JP2013104944A - Imaging unit - Google Patents

Abstract

An imaging unit including a camera shake correction mechanism capable of placing a movable stage in a movement-restricted state regardless of the position of the movable stage.
An imaging unit includes a movable stage that can move within a predetermined range and is capable of shifting between a storage state of an imaging optical system and a standby state for imaging. A plurality of optical housing members that house each optical member, a housing member drive section (23) that drives each optical housing member, and a movement regulating member 71 that presses against the movement regulating portion 72 to regulate the movement of the movable stage 52; A receiving recess 76 provided in the movable stage 52 so as to allow the insertion of the movement restricting portion 72, and the receiving recess 76 restricts the recess opening 76a to a position within a predetermined range of the movable stage 52. A plurality of conical holes whose dimensions are such that the movement restricting portion 72 is received, each receiving region 76c obtained by dividing the recess opening 76a into a plurality of bottom surfaces, and whose cross-sectional area gradually decreases toward the bottom of the receiving recess 76 It has a portion 76b.
[Selection] Figure 24

Description

  The present invention relates to an imaging unit having a camera shake correction function for correcting camera shake during shooting, and an imaging apparatus such as a digital still camera or a digital video camera (hereinafter referred to as “digital camera”) on which the imaging unit is mounted.

  In the imaging apparatus, there is a digital camera that causes a subject image to be received by an imaging element (CCD or the like) through a photographing lens system (imaging optical system) and generates a digital image corresponding to the subject image based on an image signal from the imaging element. As such a digital camera, a digital camera with a so-called camera shake correction function in which an image pickup unit having a camera shake correction mechanism for correcting camera shake at the time of shooting has been recently put into practical use.

  As such a camera shake correction mechanism, for example, an imaging element (CCD or the like) is provided on a movable stage that can move within a predetermined range along the XY plane perpendicular to the photographic optical axis as the Z-axis direction. There is a structure in which a movable stage is moved using a voice coil motor that generates a driving force by appropriately energizing a coil disposed in a magnetic field formed by a magnet. In a conventional imaging unit using this camera shake correction mechanism, for example, a tilt between the Y-axis direction and the X-axis direction is detected using a camera shake detection sensor, and an energization current to the coil is changed based on this detection output. Thus, the camera shake is corrected by performing a control of moving the image sensor to follow the movement of the subject image due to the camera shake.

  In this conventional imaging unit, when camera shake correction is not performed, it is desirable to stop the application of current to the coil from the viewpoint of reducing power consumption. However, since the movable stage is movably provided within a predetermined range, when application of current to the coil is stopped and position control of the movable stage (hereinafter referred to as electrical holding) is stopped, There is a possibility that the robot moves freely within the predetermined range, and a collision sound or an impact is generated by contact with the end of the movable range.

  Therefore, some imaging units (camera with a camera shake correction function) are provided with a lock mechanism that mechanically fixes and holds a movable stage (imaging device) (see, for example, Patent Document 1). In this structure, in order to displace the fifth lens group in the photographing optical axis direction, a locking member that can be moved in the Z-axis direction is provided by a female screw member that is moved in the Z-axis direction, and a needle provided on the locking member By fitting the shape portion through a through hole provided in the movable stage, it is possible to prevent the movement of the movable stage even in a state where electrical holding is not performed, so that power consumption can be suppressed, In addition, it is possible to prevent the occurrence of collision noise and impact caused by unexpected movement of the movable stage.

  However, in the conventional imaging unit (camera with camera shake correction function) described above, the movement of the movable stage in the XY direction is restricted by fitting the needle-like portion of the locking member and the through hole of the movable stage. Therefore, it is necessary to make the gap between the needle-like portion and the through hole viewed in the XY direction as small as possible. For this reason, before the fifth lens group is displaced in the direction of the photographic optical axis, the movable stage is moved so that the center positions of the needle-like part and the through hole viewed in the XY plane are matched with each other with extremely high accuracy Otherwise, the needle-shaped portion interferes with the movable stage, and the movable stage cannot be placed in the movement restricted state.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an imaging unit including a camera shake correction mechanism that can place the movable stage in a movement restricted state regardless of the position of the movable stage. And

  The imaging unit according to claim 1 is a movable stage that is movable along a plane so as to move an imaging element that acquires a subject image by a photographing optical system within a predetermined range as viewed in a plane orthogonal to the photographing optical axis. A storage state in which at least some of the plurality of optical members of the imaging optical system are retracted to store the optical members, and at least a part of the optical members are moved to the subject side from the storage state An imaging unit capable of shifting to a standby state, wherein a plurality of optical housing members that house each of the optical members, a housing member driving unit that drives each of the optical housing members, and movement restriction to the movable stage A movement restricting member for restricting movement of the movable stage by pressing the portion, and a receiving recess provided in the movable stage to allow insertion of the pressed movement restricting portion. The receiving recess has a recess opening as viewed in a plane orthogonal to a movement restricting direction for pressing the movement restricting portion against the movable stage regardless of the position of the movable stage within the predetermined range. The cross-sectional area that is sized to receive a portion, divides the recess opening into a plurality of receiving regions, sets each receiving region as a bottom surface, and goes to the bottom of the receiving recess, and is orthogonal to the movement restriction direction. It has a plurality of cone holes that gradually decrease.

  In the imaging unit according to the first aspect, regardless of the position of the movable stage, the movable stage can be in the movement restricted state.

1 is a front view showing a digital camera 10 as an example of an imaging apparatus according to the present invention. 2 is an explanatory diagram showing a control block in the digital camera 10. FIG. It is typical sectional drawing which shows the imaging unit 13 as an example which concerns on this invention, the upper half shows the imaging | photography standby state, and the lower half has shown the accommodation state. It is a perspective view showing typically image pick-up unit 13 in a photography stand-by state. It is a perspective view showing typically image pick-up unit 13 in a storage state. FIG. 3 is a schematic perspective view showing each configuration of the imaging unit 13 in an exploded manner. 2 is a perspective view illustrating a rear end portion of an imaging unit 13 and a camera shake correction mechanism 50 provided there. FIG. FIG. 2 is an explanatory diagram schematically showing the configuration of a camera shake correction mechanism 50, where (a) is an exploded view of the camera shake correction mechanism 50 provided at the rear end of the imaging unit 13, and (b) is a camera shake correction mechanism 50. The component part for the movement in is shown partially enlarged. It is explanatory drawing for demonstrating the outline | summary of a structure of the holding mechanism 70, and shows a mode that it saw from the rear end side of the imaging unit 13. As shown in FIG. FIG. 10 is an explanatory view showing a state in which FIG. 9 is viewed in the direction of the axis Ad in order to explain the outline of the operation in the holding mechanism 70 (movement restricting member 71), and FIG. A state in which the movable stage 52 is pressed against the movable stage 52 is shown, and (b) shows a state in which the movement restricting member 71 (movement restricted portion 72) is not pressed against the movable stage 52. It is explanatory drawing for demonstrating the structure of the movement control member 71, (a) is shown with a perspective view, (b) is shown with the top view seen from arrow A 1 shown to (a), (c) is (a It is shown in a plan view viewed from an arrow A2 shown in FIG. It is explanatory drawing for demonstrating the structure of the attachment of the 1st torsion spring 73 to the movement control member 71, (a) is shown with the perspective view similar to Fig.11 (a), (b) is FIG.11 (c). ) In the same plan view. FIG. 7 is a perspective view showing a holding shaft 74. It is explanatory drawing for demonstrating the structure of attachment of the pressing shaft 74 and the 2nd torsion spring 75 to the movement control member 71 to which the 1st torsion spring 73 was attached, (a) is shown with a perspective view, (b) Is a perspective view seen from a direction different from (a). FIG. 6 is an explanatory diagram for explaining a relationship of “pushing force” applied to the movement restricting member 71 by the first torsion spring 73 and the second torsion spring 75. It is explanatory drawing for demonstrating the structure of the attachment to the base board 48 of the pressing shaft 74 and the 2nd torsion spring 75. FIG. It is explanatory drawing for demonstrating the structure of the attachment to the base board 48 of the movement control member 71 and the 1st torsion spring 73, (a) shows the state in which the press board 77 is not attached, (b) is a presser. The state where the plate 77 is attached is shown. 4 is a perspective view showing a receiving recess 76 provided in the movable stage 52. FIG. It is explanatory drawing for demonstrating the structure of the receiving recess 76, (a) shows a mode that the receiving recess 76 was seen from the negative side of a Z-axis direction, (b) is the II line | wire of (a). (C) is a cross-section obtained along the line II-II in (a). It is explanatory drawing for demonstrating the relationship between the receiving recess 76 and the protrusion edge part 72a, (a) is the range (predetermined range) which can move to the receiving recess 76 seen from the Z-axis direction negative side. The movement restricting points 72 existing at the four corners in FIG. 5 are shown in an overlapping manner, and (b) is shown in the receiving recess 76 shown in the cross section obtained along the XZ plane including the apexes of the two cone holes 76b. The movement restricting points 72 existing at two corners viewed in the X-axis direction of the movable range (predetermined range) are shown in an overlapping manner. FIG. 20B is an explanatory diagram showing a state in which the right movement restricting portion 72 in FIG. 20B is displaced to the positive side in the Z-axis direction and is in contact with the right edge portion of the right cone hole portion 76b of the receiving recess 76. is there. It is explanatory drawing which shows a mode that the movement control location 72 is fitting in the cone hole part 76b on the right side of the receiving recess 76. FIG. It is explanatory drawing shown with the perspective view partially fractured | ruptured in order to demonstrate the state of the mechanical holding | maintenance by the holding mechanism 70 (movement control member 71), (a) shows the state of the mechanical holding | maintenance by the movement control member 71. (B) has shown the state by which the mechanical holding | maintenance by the movement control member 71 is not made | formed. FIG. 24 is an explanatory diagram showing a state in which FIG. 23 is viewed in the direction of the axis Ad in order to explain the operation of the holding mechanism 70 (movement restricting member 71), and FIG. (B) shows the other form of the state of the mechanical holding | maintenance by the movement control member 71. FIG. FIG. 24 is an explanatory diagram showing a state in which FIG. 23 is viewed in the direction of the axis Ad in order to explain the operation of the holding mechanism 70 (movement restricting member 71), and shows a state where the movement restricting member 71 is not mechanically held. . It is explanatory drawing for demonstrating the state (The positional relationship of the holding mechanism 70 containing the movable stage 52, and the 1st liner 43 (rear end surface)) which the mechanical holding | maintenance in the holding mechanism 70 was cancelled | released, (a). FIG. 3B shows a state seen from the rear end side of the imaging unit 13 along the photographing optical axis OA, and FIG. It is explanatory drawing for demonstrating the state of mechanical holding | maintenance in the holding mechanism 70 (The positional relationship of the holding mechanism 70 including the movable stage 52 and the 1st liner 43 (rear end surface)), (a) is FIG. The state seen from the same direction as (a) is shown, and (b) shows the state seen from the same direction as FIG.

  Embodiments of an imaging unit according to the present invention and an imaging apparatus equipped with the imaging unit will be described below with reference to the drawings.

  A schematic configuration of an imaging unit 13 as an example of an imaging unit according to the present invention and a digital camera 10 as an example of an imaging apparatus provided with the imaging unit 13 will be described with reference to FIGS. 1 to 6. In FIG. 6, for easy understanding, the imaging device 22, the first lens group 31, the second lens group 32, the third lens group 33, the fourth lens group 34, the shutter / aperture unit 35, and the first lens holding unit. The frame 36, the second lens holding frame 37, and the cam cylinder 46 are omitted. In the following description, with the digital camera 10 as a reference, the direction of the optical axis (see arrow OA in FIGS. 3 to 6) of the photographing optical system 12 described later is the Z-axis direction (the subject side is the positive side), and the digital camera 10 is The height direction when viewed from the front is the Y-axis direction (upward is the positive side), and the direction orthogonal to the Z-axis and the Y-axis is the X-axis direction (when the digital camera 10 is viewed from the front, the right hand is the positive side).

  First, a digital camera 10 as an example of an imaging apparatus provided with an imaging unit 13 will be described with reference to FIGS. 1 and 2. The digital camera 10 of this embodiment has a camera shake correction function (50) that corrects camera shake by moving the image sensor (22) in a plane perpendicular to the photographing optical axis (OA) direction. This will be described later. As shown in FIG. 1, the digital camera 10 is provided with an imaging unit 13 having a photographing optical system 12 on the front surface of the housing 11 (the front surface when FIG. 1 is viewed from the front). The photographing optical system 12 includes a plurality of optical members as will be described later. As will be described later, the imaging unit 13 is housed (predetermined retracted position (see FIG. 4)) and photographing standby state (predetermined feeding position (FIG. 5) along the photographing optical axis (OA) of the photographing optical system 12. See))). In this specification, the optical axis in the photographic optical system 12, that is, the rotationally symmetric axis that is the central axis position of each optical member in the photographing standby state is defined as the photographic optical axis of the photographic optical system 12, that is, the digital camera 10. OA.

  The digital camera 10 has a control unit 21 as shown in FIG. The control unit 21 performs a driving process based on an operation performed by an operation unit (not shown), a generation process of image data based on a signal from the image sensor 22, a lens barrel driving unit 23, a display unit 24, and a camera shake correction. Control such as driving of the mechanism 50 is comprehensively performed by a program stored in the storage unit 21a. The control unit 21 acquires an image with the imaging element 22 via the photographing optical system 12 (see FIG. 1), and appropriately displays the image on the display unit 24 provided on the rear surface side of the housing 11. The image sensor 22 is composed of a solid-state image sensor such as a CCD image sensor or a CMOS image sensor, and an object image formed on a light receiving surface (not shown) through the photographing optical system 12 is converted into an electric signal (image data). Convert to and output. The output electrical signal (image data) is transmitted to the control unit 21. Further, a detection signal is input to the control unit 21 from the position detection element 25 or the shake detection element 26.

The position detection element 25 detects the position of a movable stage 52 to be described later. In the present embodiment, the position detection element 25 is configured by a magnetic sensor such as a Hall element or a magnetoresistive element, and is provided on the movable stage 52. The shake detection element 26 detects camera shake occurring in the digital camera 10 itself (its casing 11). In the present embodiment, the shake detection element 26 is composed of a gyro sensor and is provided in the casing 11. The shake detection element 26 can also be configured using an acceleration sensor. The lens barrel drive unit 23 is configured to move the imaging unit 13 between the storage state (see FIG. 4) and the imaging standby state (see FIG. 5). (Not shown) is a storage member driving unit that moves each of a plurality of optical storage members (optical storage frames) that are held and stored.
(Configuration of the imaging unit 13)
Next, the configuration of the imaging unit 13 will be described with reference to FIGS. As shown in FIG. 3, the imaging unit 13 includes a first lens group 31, a second lens group 32, a third lens group 33, a fourth lens group 34, a shutter / aperture unit 35, an imaging element 22, and a first lens holding unit. Frame 36, second lens holding frame 37, third lens holding frame 38, fourth lens holding frame 39, fixed frame 41, first rotating cylinder 42, first liner 43, second rotating cylinder 44, second Liner 45, cam cylinder 46, rectilinear cylinder 47, and base plate 48.

  In this imaging unit 13, the shooting standby state (see the upper half of FIG. 3 and FIG. 4 etc.) will be described. From the object side, the first lens group 31, the second lens group 32, the third lens group 33 and the fourth lens The group 34 is sequentially arranged, and a shutter / aperture unit 35 is inserted between the second lens group 32 and the third lens group 33 to constitute the photographing optical system 12. The image sensor 22 is disposed on the image plane side of the fourth lens group 34. The first lens group 31 to the fourth lens group 34 (including the shutter / aperture unit 35) constitute a zoom lens having a variable focal length.

  The first lens group 31 includes one or more lenses. The first lens group 31 is fixed and held on the rectilinear cylinder 47 via a first lens holding frame 36 that holds them together.

  The second lens group 32 includes one or more lenses. In the second lens group 32, a cam follower (not shown) provided on a second lens holding frame 37 that holds them integrally is formed in a cam groove (not shown) for the second lens group of the cam cylinder 46. It is inserted into the rectilinear groove 45 a (see FIG. 6) of the second liner 45 so as to be able to interfere, and is supported by the cam cylinder 46 and the second liner 45.

  The third lens group 33 is composed of one or more lenses. The third lens group 33 is integrally held by a third lens holding frame 38, is retracted from the photographing optical axis OA (shooting optical path) in the housed state, and is taken in the photographing standby state in the photographing standby state. (Photographing optical path).

  The fourth lens group 34 includes one or more lenses. The fourth lens group 34 is integrally held by a fourth lens holding frame 39, is retracted from the photographing optical axis OA (shooting optical path) in the housed state, and is taken in the photographing standby state in the photographing standby state. (Photographing optical path). In the present embodiment, the fourth lens group 34 is used as a focus lens for focusing, that is, focusing.

  The shutter / aperture unit 35 includes a shutter and an aperture stop. In this shutter / aperture unit 35, a cam follower (not shown) formed integrally therewith is passed through a cam groove (not shown) for a shutter / aperture unit of the cam cylinder 46, so that the second liner 45 It is inserted into the rectilinear groove 45a (see FIG. 6) so as to be able to interfere, and is supported by the cam cylinder 46 and the second liner 45.

  The fixed frame 41 has a box shape and is fixed to a base plate 48 attached to the housing 11. The fixed frame 41 has a cylindrical fixed cylinder portion 41a (see FIG. 6 and the like) on the inside. As shown in FIG. 6, a rectilinear groove 41b and a cam groove 41c along the axial direction are formed on the inner peripheral surface of the fixed cylinder portion 41a. A key portion 43a (to be described later) of the first liner 43 is inserted into the rectilinear groove 41b so as to be able to interfere, and a cam follower 42a (to be described later) of the first rotary cylinder 42 is inserted into the cam groove 41c so as to be able to interfere. A first rotating cylinder 42 is provided inside the fixed cylinder portion 41a.

  The first rotating cylinder 42 has a cylindrical shape that can be inserted inward of the fixed cylinder portion 41a. A helicoid cam follower 42 a and a gear portion 42 b are formed on the outer peripheral surface of the base end portion of the first rotating cylinder 42. On the inner peripheral surface of the first rotating cylinder 42, a guide groove 42c and a rectilinear groove 42d are provided. The guide groove 42c is provided along a plane orthogonal to the photographing optical axis OA and has an annular shape. As will be described later, the guide groove 42c inserts the follower 43b of the first liner 43 so as to be able to interfere so that only the straight movement force of the first rotating cylinder 42 that moves straight while rotating is the first liner 43c. 43 is a rotation groove that functions as a straight guide member that acts on 43. The rectilinear groove 42d is a guide groove along the imaging optical axis OA (imaging optical path).

  The first rotary cylinder 42 is provided in the fixed cylinder portion 41a with a cam follower 42a inserted into the cam groove 41c so as to interfere with it. The first rotating cylinder 42 is rotatable with respect to the fixed cylinder portion 41a, that is, the base plate 48, with the imaging optical axis OA as an axis (hereinafter also referred to as rotation around the imaging optical axis OA). Along with the rotation, the cam follower 42a and the cam groove 41c move in the direction of the photographing optical axis OA (shooting optical path) by the guiding action. A first liner 43 is provided inside the first rotating cylinder 42.

  The first liner 43 has a cylindrical shape that can be inserted inward of the first rotating cylinder 42. A key portion 43 a and a follower 43 b are provided on the outer peripheral surface of the first liner 43. The key portion 43a is formed to protrude outward from the base end portion, and is inserted so as to be able to interfere with the rectilinear groove 41b of the fixed cylinder portion 41a. The follower 43b protrudes from the center of rotation toward the radial direction (hereinafter also referred to as the radial direction) along a plane orthogonal to the imaging optical axis OA, and the imaging optical axis OA in the first rotating cylinder 42 is provided. It is inserted through the insertion groove 42e along the (imaging optical path) so as to interfere with the annular guide groove 42c. With such a configuration, the first rotating cylinder 42 and the first liner 43 move integrally with respect to the fixed cylinder portion 41a in the direction of the imaging optical axis OA (imaging optical path), and the imaging optical axis OA. Relative rotation (rotational movement) is possible. For this reason, the first liner 43 is integrally formed with the first rotating cylinder 42 in the fixed cylinder portion 41a while being prevented from rotating with respect to the fixed cylinder portion 41a inside the first rotating cylinder 42 which is a rotating cylinder. On the other hand, it functions as a rectilinear cylinder (straight guide cylinder) held by the fixed cylinder portion 41a so as to be movable in the direction of the photographing optical axis OA.

  A straight groove 43c and a helicoid 43d are provided on the inner surface of the first liner 43. The rectilinear groove 43c is formed to extend in the direction of the photographing optical axis OA (shooting optical path). A key portion 45b provided on the outer periphery of a base end portion, which will be described later, of the second liner 45 is inserted into the rectilinear groove 43c so as to allow interference. The helicoid 43d is meshed with a helicoid 44a formed on the outer peripheral surface of a base end portion to be described later of the second rotating cylinder 44.

  Further, the first liner 43 is formed with a relief groove 43e. The escape groove 43e is provided through a peripheral wall portion as the first liner 43 so as to pass a cam follower 44b of a second rotating cylinder 44 described later, and is formed in a spiral shape equal to the helicoid 43d. . The size of each of the escape grooves 43e is set so that a gap is generated between the escape groove 43e and the cam follower 44b from the viewpoint of preventing the movement of the cam follower 44b to be passed.

  Next, a flange portion 43 f is formed on the outer peripheral surface of the first liner 43. The flange portion 43f is formed at the base end portion of the outer peripheral surface so as to protrude in the radial direction with a predetermined width dimension and to extend in the circumferential direction of the outer peripheral surface, and a part of the flange portion 43f seen in the outer peripheral direction is the key portion 43a. It overlaps the protruding base part. A second rotating cylinder 44 is provided inside the first liner 43.

  The second rotating cylinder 44 has a cylindrical shape that can be inserted inward of the first liner 43. A helicoid 44 a is formed on the outer peripheral surface of the base end portion of the second rotating cylinder 44. The helicoid 44 a is meshed with a helicoid 43 d provided on the inner periphery of the first liner 43. Further, a cam follower 44 b is provided so as to protrude from the outer peripheral surface in the vicinity of the base end portion of the second rotating cylinder 44. The cam follower 44b is inserted through the escape groove 43e of the first liner 43 into a rectilinear groove 42d provided on the inner periphery of the first rotating cylinder 42 so as to be able to interfere.

  With such a configuration, when the first rotating cylinder 42 rotates around the optical axis, the cam follower 44b of the second rotating cylinder 44 is pushed by the rectilinear groove 42d of the first rotating cylinder 42 to perform the second rotation. The tube 44 rotates around the optical axis. At this time, as described above, the first liner 43 is prevented from rotating due to the key portion 43a interfering with the rectilinear groove 41b of the fixed cylinder portion 41a, so that the helicoid 43d and the helicoid 44a Due to the guiding action, the second rotating cylinder 44 moves in the direction of the photographing optical axis OA relative to the first liner 43.

  A guide groove 44 c and a cam groove 44 d are formed on the inner peripheral surface of the second rotating cylinder 44. The guide groove 44c is provided along a plane orthogonal to the photographing optical axis OA (shooting optical path), and a follower (or key) 45c of a second liner 45 described later is inserted so as to be able to interfere. With such a configuration, the second liner 45 and the second rotating cylinder 44 move integrally in the direction of the photographic optical axis OA (photographing optical path) and are relatively rotated (rotated) around the photographic optical axis OA. Movement) is possible. The cam groove 44 d is a cam groove for moving the rectilinear cylinder 47. A second liner 45 is provided inside the second rotating cylinder 44.

  The second liner 45 has a cylindrical shape that can be inserted inward of the second rotating cylinder 44. The second liner 45 is formed with a key portion 45b, a follower (or key) 45c, and a rectilinear groove 45d on the outer peripheral surface of the base end portion. The key portion 45b protrudes in a key shape from the rear end of the second liner 45 toward the radially outer side. The key portion 45 b is in contact with the rear end surface of the second rotating cylinder 44, and the tip portion is inserted in the rectilinear groove 43 c of the first liner 43 so as to be able to interfere. Further, the follower (or key) 45c protrudes radially outward from the outer peripheral surface of the second liner 45. The follower (or key) 45c is inserted into the guide groove 44c of the second rotating cylinder 44 so as to be able to interfere with it, so that only the rectilinear moving force of the second rotating cylinder 44 that moves straight while rotating is supplied to the second liner. 45 is a linear guide member that acts on 45. The rectilinear groove 45 d is provided along the axial direction on the outer peripheral surface of the second liner 45. With this configuration, the second liner 45 moves integrally with the first liner 43 in the direction of the second rotating cylinder 44 and the imaging optical axis OA (imaging optical path), and the imaging optical axis OA. Rotation around is prevented. For this reason, the second liner 45 is integrally formed with the second rotary cylinder 44 while being prevented from rotating with respect to the fixed cylinder portion 41a inside the second rotary cylinder 44, which is a rotary cylinder. On the other hand, it functions as a rectilinear cylinder (straight guide cylinder) held by the fixed cylinder portion 41a so as to be movable in the direction of the photographing optical axis OA.

  On the inner peripheral surface of the second liner 45, a rectilinear groove 45a provided along the direction of the photographic optical axis OA (photographic optical path) and a guide groove 45e along a plane orthogonal to the photographic optical axis OA (photographic optical path). And are formed. Although not shown in the drawing, the straight groove 45a is passed through the cam follower of the second lens holding frame 37 passed through the cam groove for the second lens group and the cam groove for the shutter / aperture unit as described above. Further, the cam follower of the shutter / aperture unit 35 is inserted so as to be able to interfere. Although not shown, a follower (or key), which is a linear guide member provided so as to protrude from the outer peripheral surface (front side) of the cam cylinder 46 (see FIG. 3), is inserted into the guide groove 45e so as to be able to interfere. . As shown in FIG. 3, the cam cylinder 46 has a cylindrical shape and is fitted into the inner periphery of the second liner 45. The cam cylinder 46 has a protrusion (not shown) provided so as to protrude from the outer periphery of the base end portion and is fitted into the base end portion of the second rotary cylinder 44 so as to rotate integrally with the second rotary cylinder 44. It is like that. With such a configuration, the cam cylinder 46 and the second liner 45 integrally move in the direction of the photographing optical axis OA (shooting optical path), and relative rotation (rotational movement) around the photographing optical axis OA. It is possible.

  Between the second liner 45 and the second rotating cylinder 44, the base end side of the rectilinear cylinder 47 is inserted. As shown in FIG. 6, the rectilinear cylinder 47 has a cylindrical shape that can be inserted into the second rotating cylinder 44. A cam follower 47 a projects from the outer peripheral surface of the rectilinear cylinder 47 near the base end. The cam follower 47a is inserted in a cam groove 44d formed on the inner peripheral surface of the second rotating cylinder 44 so as to be able to interfere with it. Although not shown, a key portion is formed on the inner peripheral surface of the rectilinear cylinder 47, and the key portion is inserted into the rectilinear groove 45d on the outer peripheral surface of the second liner 45 so as to be able to interfere. For this reason, the rectilinear cylinder 47 can be moved (straightly moved) in the direction of the photographic optical axis OA (photographing optical path) with respect to the second liner 45, and rotation around the photographic optical axis OA is prevented. Has been.

  Next, the operation of the imaging unit 13 described above will be described. FIG. 4 shows the imaging unit 13 that is in the extended position in the shooting standby state, and FIG. 5 shows the imaging unit 13 that is in the retracted position in the retracted state.

  In the imaging unit 13, the drive motor (not shown) of the lens barrel drive unit 23 (see FIG. 2) is connected to the first rotating cylinder 42 through a gear (not shown) meshed with the gear portion 42b. The driving force is appropriately transmitted to the gear and rotated. When the first rotating cylinder 42 is rotationally driven in the accommodated state (collapsed position (see FIG. 5)) accommodated in the fixed cylinder part 41a, the fixed cylinder part 41a is guided by the cam follower 42a and the cam groove 41c. With respect to the photographic optical axis OA, it moves forward toward the object (subject) side (Z-axis direction positive side). When the first rotating cylinder 42 is driven to rotate, the rectilinear groove 42 d presses the cam follower 44 b of the second rotating cylinder 44, so that the second rotating cylinder 44 emits light against the first liner 43. Due to the guiding action of the helicoid 43d and the helicoid 44a of the first liner 43 that is rotated around the axis and prevented from rotating, the second rotating cylinder 44 is in the direction of the photographing optical axis OA with respect to the first liner 43 ( (Z-axis direction). As a result, the first rotary cylinder 42, the first liner 43, and the second rotary cylinder 44 are extended to the maximum position where they can be extended, for example, to the telephoto end (see FIG. 4). At this time, in the imaging unit 13, as described above, the second liner 45, the cam cylinder 46, and the rectilinear cylinder are accompanied by the operations of the first rotating cylinder 42, the first liner 43, and the second rotating cylinder 44. By appropriately rotating and reciprocating 47, the first lens group 31 held by the first lens holding frame 36, the second lens group 32 held by the second lens holding frame 37, and the shutter / aperture unit 35 are moved. The zooming operation is performed as prescribed. Further, the third lens group 33 held integrally by the third lens holding frame 38 is disposed on the photographing optical axis OA (shooting optical path) and performs a zooming operation as prescribed (see the upper half of FIG. 3). ). Further, the fourth lens group 34 integrally held by the fourth lens holding frame 39 is disposed on the photographing optical axis OA (shooting optical path) (see the upper half of FIG. 3) and is focused as predetermined. Operate.

  Therefore, in the imaging unit 13, the first lens holding frame 36, the second lens holding frame 37, the third lens holding frame 38, the fourth lens holding frame 39, the fixed cylinder portion 41a (fixed frame 41), and the first rotation. The cylinder 42, the first liner 43, the second rotating cylinder 44, the second liner 45, the cam cylinder 46, and the rectilinear cylinder 47 are a first lens group 31 and a second lens as optical members constituting the photographing optical system 12. It functions as an optical housing member that houses the lens group 32, the third lens group 33, the fourth lens group 34, and the shutter / aperture unit 35. Further, the first lens holding frame 36, the second lens holding frame 37, the third lens holding frame 38, the fourth lens holding frame 39, the first rotating cylinder 42, the first liner 43, the second rotating cylinder 44, The second liner 45, the cam cylinder 46, and the rectilinear cylinder 47 are used for transition between the storage state of the first lens group 31, the second lens group 32, the third lens group 33, and the fourth lens group 34 and the photographing standby state. And a movable optical housing member (hereinafter referred to as 49) that moves between the retracted position and the extended position in the direction of the photographic optical axis OA with respect to the fixed cylinder portion 41a (fixed frame 41). (See FIG. 10 etc.)).

The positions of the first rotary cylinder 42 and the like are such that a pinion gear having an encoder shape directly fixed to the output shaft thereof is configured by forming a drive motor (not shown) using a general DC (direct current) motor. Then, control can be performed using the count of drive pulses generated by a zoom count detector, for example, a photo interrupter installed in the vicinity thereof. In this embodiment, the driving source for moving the first rotary cylinder 42 is a DC motor, and the detection of the driving position is achieved by a detector using an encoder and a photo interrupter. The same function can be achieved even if replaced with. For this reason, the drive motor functions as a lens drive mechanism drive source (movable lens barrel drive source for moving the movable lens barrel forward and backward in the direction of the photographing optical axis OA) to drive the lens drive mechanism together with the spline gear, etc. It functions as a lens holding frame driving means for driving the movable lens holding frame via the movable lens barrel.
(Configuration of the image stabilization mechanism 50)
As shown in FIG. 7, the camera shake correction mechanism 50 is provided at the rear end of the imaging unit 13, and the imaging element 22 is a plane (XY plane) orthogonal to the imaging optical axis OA direction (Z-axis direction). The camera shake is corrected by moving the camera within the camera. Hereinafter, the configuration of the camera shake correction mechanism 50 will be described mainly with reference to FIG. FIG. 7 is a perspective view showing the rear end portion of the imaging unit 13 and the camera shake correction mechanism 50 provided there. 8A and 8B are explanatory views schematically showing the camera shake correction mechanism 50. FIG. 8A is an exploded view of the camera shake correction mechanism 50 provided at the rear end of the imaging unit 13, and FIG. 8B is a camera shake correction. The components for movement in the mechanism 50 are shown partially enlarged.

  In the camera shake correction mechanism 50, in this embodiment, the imaging device 22 is mounted on a flexible printed circuit board 51 (hereinafter also referred to as “FPC 51”) (see FIG. 8), and a movable stage 52 (see FIG. 8) to which the FPC 51 is fixed. 8B) is movably supported. As shown in FIG. 8B, the movable stage 52 is provided on the slide frame 54 via the first guide shafts 53. Each first guide shaft 53 has a rod shape extending in a first direction (Y-axis direction in the present embodiment) orthogonal to the photographing optical axis OA direction (Z-axis direction), and is fixed to the slide frame 54. The movable stage 52 is supported by each first guide shaft 53 so as to be slidable, and is movable in the first direction with respect to the slide frame 54.

  The slide frame 54 is provided on the attachment frame 56 via each second guide shaft 55. Each of the second guide shafts 55 has a rod shape extending in a second direction (X-axis direction in this embodiment) orthogonal to the photographing optical axis OA direction (Z-axis direction), and is fixed to the mounting frame 56. The attachment frame 56 is fixed to a base plate 48 (fixed frame 41) attached to the housing 11 (see FIG. 8A). The slide frame 54 is supported by each second guide shaft 55 so as to be slidable, and is movable in the second direction with respect to the mounting frame 56. As a result, the movable stage 52, that is, the imaging device 22 (FPC 51) fixed thereto, moves in the first direction and the second direction within a predetermined range with respect to the mounting frame 56, that is, the base plate 48 (the photographing optical system 12). It is possible to move along a plane including the XY plane (a plane orthogonal to the direction of the photographing optical axis OA). With this configuration, the predetermined range has a rectangular shape having sides parallel to the X-axis direction and the Y-axis direction (see the two-dot chain line shown in FIG. 20A). Further, with such a configuration, the movable stage 52 (the image sensor 22 (FPC 51)) is restricted from moving in the direction of the photographing optical axis OA with respect to the base plate 48 (mounting frame 56).

  As shown in FIG. 8A, the FPC 51 (movable stage 52) is provided with a first drive coil 57 and a second drive coil 58. The first drive coil 57 is provided opposite to the first drive magnet 61, and the second drive coil 58 is provided opposite to the second drive magnet 62 in the photographing optical axis OA direction (Z-axis direction). The first drive magnet 61 and the second drive magnet 62 are fixed to the base plate 48 although not clearly shown. The first drive coil 57 and the first drive magnet 61 are present in the first direction with respect to the photographing optical axis OA (Z axis), and the second drive coil 58 and the second drive magnet 62 are photographed. It exists in the second direction with respect to the optical axis OA (Z axis).

  In the camera shake correction mechanism 50, magnetic force is appropriately generated in the first drive coil 57 and the second drive coil 58 under the control of the control unit 21 (see FIG. 2), and the first and second drive coils 58 and 58 are opposed to each other in the direction of the photographing optical axis OA. By appropriately applying an attractive repulsion force by both magnetic forces between the first drive magnet 61 and the second drive magnet 62, the movable stage 52 is moved in the first direction and the slide frame 54 is moved in the second direction, respectively. Can do. In the camera shake correction mechanism 50, a position detection element 25 (see FIG. 2) for detecting the position of the movable stage 52 is provided.

  As the position detection element 25, in the present embodiment, a first position detection sensor 63 and a second position detection sensor 64 are provided on the FPC 51 (movable stage 52). A detection magnet 65 and a second position detection magnet 66 are provided. In the present embodiment, magnetic sensors such as Hall elements and magnetoresistive elements are used for the first position detection sensor 63 and the second position detection sensor 64. The first position detection sensor 63 and the second position detection sensor 64 detect changes in the magnetic field formed by the first position detection magnet 65 and the second position detection magnet 66, and thereby the FPC 51 with respect to the base plate 48 on which they are provided. The position of the (movable stage 52), that is, the position of the image sensor 22 can be detected.

  The FPC 51 is provided with a strip-shaped connecting portion 51a extending from a location where the image sensor 22 is mounted. Although not shown, the connecting portion 51a is connected to a control board on which the control unit 21 and the shake detection element 26 (see FIG. 2) described above are provided.

  In the camera shake correction mechanism 50, the first drive coil 57 and the second drive coil 58 are controlled based on the shake detection information detected by the shake detection element 26 (see FIG. 2) under the control of the control unit 21 (see FIG. 2). The current applied to the is controlled. By this control, an attractive repulsive force caused by a magnetic force is appropriately applied between the first drive coil 57 and the second drive coil 58 and the first drive magnet 61 and the second drive magnet 62. By this suction repulsive force, the movable stage 52 is moved in the first direction and the slide frame 54 is moved in the second direction so as to cancel the camera shake. Here, in the camera shake correction mechanism 50, since this movement uses the attractive repulsion force due to the magnetic force, the position detection element 25 (see FIG. 2) so as to appropriately move to the set movement target position. Servo control is performed based on the position information.

  At this time, in the camera shake correction mechanism 50 (control unit 21), the origin position in the XY plane in the moving range of the movable stage 52 is set. In addition, the camera shake correction mechanism 50 (control unit 21) sets the movement target position based on the shake detection information from the shake detection element 26 (see FIG. 2), and the movement direction from the origin position to the movement target position and The movement amount is calculated, and the movable stage 52 is moved in the movement direction by the movement amount. In this manner, the position of the movable stage 52 in the XY plane is controlled by the attractive repulsive force due to the magnetic force, that is, the movable stage 52 is movable by controlling the current applied to the first drive coil 57 and the second drive coil 58. Hereinafter, a state where the stage 52 is at an arbitrary position in the XY plane is referred to as electrical holding.

  In the camera shake correction mechanism 50, the origin position in the electrical holding described above is determined by the slide frame 54 and the mounting frame 56 so that the movable stage 52 can be moved equally regardless of the moving direction on the XY plane. It is coincident with the center position in the range that is movable on the XY plane. Since it is not known in which direction on the XY plane the camera shake occurs, the movable stage 52, that is, the image sensor 22 is moved in any direction on the XY plane with respect to the base plate 48. It is desirable to be able to do that. Further, in the camera shake correction mechanism 50, the above-described origin position is positioned on the photographing optical axis OA (Z axis) in order to suppress the deterioration of the image due to the influence of the aberration or the like in the photographing optical system 12.

  For this reason, in the camera shake correction mechanism 50, the movable stage 52, that is, the image sensor 22 is moved on the XY plane so as to cancel the camera shake based on the origin position on the photographing optical axis OA in the electrically held state. To correct camera shake. The origin position is stored in a storage unit 21a (see FIG. 2) provided in the control unit 21 and can be appropriately acquired by the control unit 21. For this reason, in the digital camera 10, that is, the camera shake correction mechanism 50, the control unit 21 applies the data to the first drive coil 57 and the second drive coil 58 based on the origin position data stored in the storage unit 21 a (see FIG. 2). By controlling the applied current, it is possible to move the movable stage 52, that is, the image sensor 22 to the origin position set on the imaging optical axis OA and to be at the origin position in the electrically held state. Can be maintained.

  Next, the holding mechanism 70 in the imaging unit 13 will be described with reference to FIGS. 9 to 27 in addition to FIG. In FIG. 9, for ease of understanding, the movable parts of the camera shake correction mechanism 50 are not shown. In FIG. 16, the movement restricting member 71 and the first torsion spring 73 are omitted for easy understanding. Further, in FIG. 17, for the sake of easy understanding, the pressing shaft 74 and the second torsion spring 75 are omitted. 26 and 27, members other than the first liner 43, the movable stage 52, the movement restricting member 71, the first torsion spring 73, the pressing shaft 74, and the second torsion spring 75 are omitted for easy understanding. Show. In addition, in FIG. 26 and FIG. 27, for ease of understanding, the first liner 43 is shown with dots while being simplified, and the movable stage 52 partially shows only the periphery of the holding mechanism 70. .

  In this embodiment, the holding mechanism 70 is movable with respect to the base plate 48 (mounting frame 56) along the XY plane (a plane orthogonal to the direction of the photographing optical axis OA). The element 22 (FPC 51)) is fixed at an arbitrary position in the XY plane without applying a current to the first drive coil 57 and the second drive coil 58 (see FIG. 8) to restrict movement. Is. As shown in FIGS. 9 and 10, the holding mechanism 70 basically presses the movement restricting portion 72 of the movement restricting member 71 provided on the base plate 48 against the movable stage 52, thereby causing the base plate 48 and the movable stage 52 to move. The relative movement is prevented by spanning 52 with the movement restricting member 71.

  In the holding mechanism 70, as shown in FIG. 10, a “pressing force F <b> 1” is applied to the movement regulating member 71 by a first elastic member (not shown) in a direction in which the movement regulating portion 72 is pressed against the movable stage 52. Further, in the holding mechanism 70, as shown in FIG. 10B, a “pushing force F2” that is opposite to the “pushing force F1” and is larger than the “pushing force F1” is not illustrated. The elastic member is applied to the movement restricting member 71. For this reason, the holding mechanism 70 is released from the state in which the “pushing force F1” substantially pushes the movement regulating member 71, and the movement regulating member 71 is moved by the force obtained by subtracting the “pushing force F1” from the “pushing force F2”. By pressing, the movement restriction part 72 is not pressed against the movable stage 52. As a result, the movable stage 52 is movable inside the base plate 48.

  In addition, in the holding mechanism 70, as shown in FIG. 10 (a), the “pushing force F3 associated with the movement of the movable optical accommodation member 49 from the extended position (photographing standby state) toward the retracted position (accommodated state). That is, the movable optical accommodating member 49 that moves to the negative side in the Z-axis direction (the image plane side in the direction of the photographic optical axis OA) with respect to the fixed cylinder portion 41a (fixed frame 41) generates “pressing force F3”. The configuration is such that it acts in a direction against F2 ”, and the“ pushing force F2 ”is set smaller than the“ pushing force F3 ”. For this reason, in the holding mechanism 70, when the movable optical accommodation member 49 is set to the retracted position, the “pushing force F2” from the movable optical accommodation member 49 cancels the “pushing force F2”, and substantially the “pushing force”. The state where F2 ”is pressing the movement restricting portion 72 is released, and the movement restricting member 71 is pushed with“ pushing force F1 ”, whereby the movement restricting portion 72 is pressed against the movable stage 52. Thereby, the movable stage 52 is fixed inside the base plate 48. As described above, in the holding mechanism 70, the action directions of the “pushing force F1”, “pushing force F2”, and “pushing force F3” with respect to the movement restricting member 71 are set as described above, and the magnitudes of these forces are set as follows. It sets so that it may become the relationship of Formula (2).

| F1 | <| F2 | <| F3 | (1)
A first elastic member (not shown) (first torsion spring 73 described later), a second elastic member (not shown) (second torsion spring 75 described later), and movement restriction with respect to the position of the movable optical housing member 49 in the holding mechanism 70. The relationship between the state of the member 71 and the movable stage 52 is shown in the following table.

  Thus, in the holding mechanism 70, the state where the movement restricting portion 72 of the movement restricting member 71 is pressed against the movable stage 52, the state where the movement restricting portion 72 of the movement restricting member 71 is not pressed against the movable stage 52, Are switched according to the position of the movable optical housing member 49 with respect to the fixed cylinder portion 41a (fixed frame 41). The holding mechanism 70 has a configuration in which the movement restricting portion 72 of the movement restricting member 71 is pressed against the movable stage 52 by the “pushing force F1” from the first elastic member (not shown), and the movement by the “pushing force F1” is performed. The pressing of the restriction location 72 to the movable stage 52 is canceled by a “pushing force F2” from a second elastic member (not shown), and the “pushing force F2” is accompanied by the movement of the movable optical housing member 49. It is set as the structure cancelled | released using "pressing force F3".

  In the present embodiment, as shown in FIG. 10, the holding mechanism 70 is a movable stage 52 from the rear side (the front side is the subject side) when the movement restriction portion 72 of the movement restriction member 71 is viewed in the direction of the photographing optical axis OA. Is pressed (pressed toward the positive side in the Z-axis direction). For this reason, in the holding mechanism 70, the movement restricting member 71 is configured to be rotatable around an axis Ad orthogonal to the direction of the photographing optical axis OA, and the movement restricting portion 72 indicates the direction of action of the “pressing force F1”. The movement restricting member 71 is configured to rotate around the axis Ad in a direction that advances toward the positive side in the OA direction. This is the normal rotation direction in the movement restricting member 71. In the holding mechanism 70, the direction in which the “pushing force F2” is applied is such that the movement restricting portion 72 is pressed against the movable stage 52 with respect to a plane including the axis Ad and a straight line orthogonal to the photographing optical axis OA. Is configured to push the movement regulating member 71 toward the positive side in the photographic optical axis OA direction on the opposite side (the reverse direction in the movement regulating member 71). As a result, the holding mechanism 70 causes the “pushing force F1” and the “pushing force F2” to act against each other, and the “pushing force F2” and the movable optical housing member 49 are on the negative side in the photographing optical axis OA direction. The “pushing force F3” generated by moving in the direction is applied to oppose each other. For this reason, in this embodiment, the forward rotation direction in the movement restriction member 71 is the movement restriction direction, and the reverse direction in the movement restriction member 71 is the release direction.

  This embodiment, which is one specific example of such a configuration, will be described below. As shown in FIG. 7, the holding mechanism 70 includes a first torsion spring 73, a pressing shaft 74, and a second torsion spring 75 in addition to the movement restriction member 71. The movement restricting member 71 is provided on the base plate 48 and can be transferred to the movable stage 52 that is relatively movable inward thereof.

  As shown in FIG. 11, the movement restricting member 71 includes a rotation base portion 81, a pair of rotation shaft portions 82, a restriction arm portion 83, a first rotational force receiving portion 84, a protruding portion 85, and a second rotation. A force receiving portion 86. The rotation base 81 has a cylindrical shape as a whole. The axis of the rotation base 81 defines the axis Ad of the movement restricting member 71. In this embodiment, the movement restricting member 71 is provided on the base plate 48 with the axis Ad along the X-axis direction as will be described later. In the following description, the XYZ coordinates are set with the axis Ad as the X-axis direction. Use.

  The pair of rotation shaft portions 82 are provided so as to protrude from both ends of the rotation base portion 81 in the X-axis (axis line Ad) direction. Both rotating shaft portions 82 have a columnar shape having an outer diameter smaller than that of the rotating base portion 81 as a whole. Of the two rotating shaft portions 82, the rotating shaft portion 82 a on the positive side in the X-axis direction has an outer diameter dimension changed at an intermediate position viewed in the X-axis direction. Is set larger. The large-diameter portion in the rotary shaft portion 82a becomes a first attachment portion 87 to which the first torsion spring 73 is attached as will be described later. The rotation shaft portion 82b on the X axis direction negative side of both the rotation shaft portions 82 is provided with a rectangular parallelepiped rotation restricting portion 82c protruding to the Z axis direction negative side.

  The restricting arm portion 83 is provided so as to protrude from the side surface of the rotation base portion 81 to the negative side in the Y axis direction and the X axis direction along the XY plane. The restricting arm 83 has a flat plate shape as a whole, and a movement restricting portion 72 is provided at the tip. The movement restricting portion 72 is formed so as to protrude from the plane of the tip end portion of the restricting arm portion 83 to the positive side in the Z-axis direction. In the present embodiment, the movement restricting portion 72 has a hemispherical protruding end 72a, and a facing surface 72b serving as a surface thereof has a spherical shape. The facing surface 72b is a location that opposes a receiving recess 76 of the movable stage 52, which will be described later, in the Z-axis direction (movement regulation direction) in the movement regulation location 72 (see FIGS. 24, 25, etc.).

  The first rotational force receiving portion 84 is formed to protrude from the side surface of the rotation base portion 81 to the Y axis direction positive side. In the first rotational force receiving portion 84, a protruding end portion is provided with a rectangular parallelepiped hooking piece 84a that protrudes toward the positive side in the X-axis direction, and a hooking groove 84b is formed in the hooking piece 84a. The hooking groove 84b is formed by cutting out the hooking piece 84a from the end surface on the positive side in the Z-axis direction toward the intermediate position on the negative side in the Z-axis direction, and penetrates the hooking piece 84a in the Y-axis direction. .

  The protruding portion 85 is formed so as to protrude from the side surface of the end portion on the rotating shaft portion 82a side of the rotating base portion 81 to the Z axis direction positive side. The protruding portion 85 has a rectangular parallelepiped shape, and forms a positioning surface 85a (see FIG. 11C) on the X axis direction negative side. The positioning surface 85a is a flat surface that is displaced from the positive side in the Y-axis direction to the negative side while including the Z-axis direction (see FIG. 11C). .

  The second rotational force receiving portion 86 is provided on the side surface of the rotation base portion 81 at a position spaced from the positioning surface 85a of the protruding portion 85 toward the X axis direction negative side. The second rotational force receiving portion 86 includes a protruding base portion 86a that protrudes from the position on the side surface to the Z-axis direction positive side, and a protruding arm portion 86b that protrudes from the protruding end portion to the Y-axis direction positive side, It has a hooking portion 86c provided at the protruding end portion and a drop-off preventing piece 86d provided at the end portion on the Y axis direction positive side. In the second rotational force receiving portion 86, the surface on the negative side in the Z-axis direction at the hooking portion 86c is formed along a substantially XY plane, and rises along the XZ plane while being orthogonal to the surface. A surface on the negative side in the Y-axis direction of the drop-off preventing piece 86d is formed. Further, the protruding base portion 86a of the second rotational force receiving portion 86 has a rectangular parallelepiped shape, and forms a positioning surface 86e (see FIGS. 11A and 11C) on the X axis direction positive side. The positioning surface 86e is a flat surface along the YZ plane (see FIG. 11C). For this reason, the positioning surface 86e faces the positioning surface 85a of the protruding portion 85 when viewed in the X-axis direction. In addition, the above-mentioned predetermined interval makes it possible to apply the leg 74d (see FIG. 12B, FIG. 13, etc.) of the pressing shaft 74 to the positioning surface 85a and the positioning surface 86e, as will be described later. Set to dimensions.

  A first torsion spring 73 is attached to the movement restricting member 71 as shown in FIG. The first torsion spring 73 is formed of a single wire having one end 73b and the other end 73c projecting from the spiral portion 73a. The first torsion spring 73 is one end 73b when viewed in the direction around the axis of the spiral portion 73a. And exerts an elastic force that resists the operation of bringing the other end 73c closer to each other. The first torsion spring 73 surrounds the first attachment portion 87 (large-diameter portion) of the rotation shaft portion 82a with the spiral portion 73a, and the one end portion 73b is a hook groove 84b of the hook piece 84a of the first rotational force receiving portion 84. And is attached to the movement restricting member 71.

  Further, the movement regulating member 71 is provided with a pressing shaft 74 as shown in FIGS. The pressing shaft 74 is provided to attach the second torsion spring 75 so that a pressing force (“pressing force F2”) from the second torsion spring 75 is applied to the movement restricting member 71. As shown in FIG. 13, the holding shaft 74 has a cylindrical rod shape as a whole, has an axis extending in the Y-axis direction, and has a head 74a, a neck 74b, a trunk 74c, and a leg 74d from the Y-axis direction positive side. And have. The head 74a has a disk shape. The neck 74b has a columnar shape with an outer diameter smaller than that of the head 74a. The trunk portion 74c has a columnar shape that is larger than the neck portion 74b and smaller in outer diameter than the head portion 74a. For this reason, in the pressing shaft 74, an annular recess is formed by the neck 74b. The leg portion 74d has a columnar shape with an outer diameter smaller than that of the trunk portion 74c. The leg portion 74d is negative from the positive side in the Y-axis direction between the positioning surface 85a of the protruding portion 85 of the movement restricting member 71 and the positioning surface 86e of the protruding base portion 86a of the second rotational force receiving portion 86. The outer diameter of the positioning surface 85a (the tip portion thereof) and the positioning surface 86e can be contacted in the X-axis direction (see FIG. 12B). Etc.). As shown in FIGS. 12B, 14, and 15, the second torsion spring 75 is attached to the pressing shaft 74.

  The second torsion spring 75 is formed of a single wire having one end portion 75b and the other end portion 75c projecting from the spiral portion 75a. One end portion 75b is seen around the axis of the spiral portion 75a. And exerts an elastic force that resists the operation of bringing the other end portion 75c closer to each other. The elastic force in the second torsion spring 75 is set larger than the elastic force in the first torsion spring 73, and the movable optical housing member 49 (first liner 43) is moved to the negative side in the Z-axis direction. It is set smaller than the force. The second torsion spring 75 is attached to the pressing shaft 74 with the spiral portion 75a surrounding the body portion 74c of the pressing shaft 74, with one end portion 75b directed to the hooking portion 86c of the second rotational force receiving portion 86, It is provided in association with the movement restricting member 71. At this time, the one end portion 75b has a length dimension that advances beyond the hooking portion 86c to which the tip portion 75d is addressed. The movement restricting member 71 is provided on the base plate 48.

  The base plate 48 is provided with an installation portion 48a for attaching the movement restricting member 71 (see FIG. 17). As shown in FIGS. 16 and 17, the installation portion 48a is formed by denting the surface on the negative side in the Z-axis direction of the base plate 48 toward the positive side in the Z-axis direction. The installation portion 48a includes a first bearing 48b that has a U-shape that penetrates in the X-axis direction and is open on the negative side in the Z-axis direction. And a second bearing 48c exhibiting the following. The first bearing 48b and the second bearing 48c are provided on the same line extending in the X-axis direction, and the first bearing 48b exists on the positive side. The installation portion 48a includes a third bearing 48d that penetrates the wall on the Y axis direction positive side of the base plate 48 and a fourth bearing 48e that has a circular hole shape with a circular cross section open on the Y axis direction positive side. 16). The third bearing 48d and the fourth bearing 48e are provided on the same line extending in the Y-axis direction, and the third bearing 48d exists on the positive side.

  The movable stage 52 is provided with a receiving recess 76 (see FIG. 17) at a place where the movement restricting portion 72 is pressed, that is, a portion facing the movement restricting portion 72 in the Z-axis direction. As shown in FIG. 18, the receiving recess 76 is formed by denting a portion where the FPC 51 is not provided on the negative side surface of the movable stage 52 to the positive side in the Z-axis direction. The receiving recess 76 is a recess opening 76a serving as an open end on the negative side in the Z-axis direction, and opens the surface of the movable stage 52. As shown in FIGS. 18 and 19, the receiving recess 76 has a plurality of cone hole portions 76 b (which have a cone shape that gradually decreases in cross-sectional area from the negative side to the positive side in the Z-axis direction). In the example shown in the figure, there are four). The cone hole portion 76b has a cone shape having a plurality of receiving regions 76c (four in the illustrated example) formed by dividing the recess opening 76a. This recess opening 76a (receiving recess 76) is a movement restriction regardless of the position within the movable range (predetermined range) along which the movable stage 52 is movable along the XY plane. It is sized and configured to accept the location 72 (its protruding end 72a).

  The relationship between the size of the receiving recess 76 (recess opening 76a) and the movement restricting location 72 (projecting end 72a) will be described with reference to FIGS. 20 to 22 in addition to FIGS. To do. FIG. 20 is an explanatory diagram for explaining the relationship between the receiving recess 76 and the projecting end 72a, and FIG. (B) shows the cross section obtained along the XZ plane including the apexes of the two cone holes 76b. In the recess 76, a movement restricting portion 72 existing at two corners of the movable range (predetermined range) viewed in the X-axis direction is shown superimposed. In FIG. 20A, the range in which the center position of the movement restricting portion 72 (its protruding end portion 72 a) can move with respect to the receiving recess 76 is indicated by a two-dot chain line square. FIG. 21 shows a state in which the right movement restricting portion 72 in FIG. 20B is displaced to the positive side in the Z-axis direction and is in contact with the right edge of the right cone hole 76b of the receiving recess 76. Show. FIG. 22 shows a state in which the movement restricting portion 72 is fitted in the right cone hole 76 b of the receiving recess 76.

  In this embodiment, the receiving recess 76 has a square shape in which the recess opening 76 a has sides parallel to the X-axis direction and the Y-axis direction, and each receiving region 76 c is a square obtained by dividing the recess opening 76 a into four equal parts. Each cone hole 76b has a regular quadrangular pyramid shape (see FIGS. 18 and 19). In addition, as described above, in the present embodiment, the movement restricting portion 72 has the protruding end portion 72a in a hemispherical shape, and the opposing surface 72b serving as the surface thereof has a spherical shape. For this reason, since the relationship seen in the X-axis direction and the relationship seen in the Y-axis direction can be set equal in the receiving recess 76 and the movement restriction location 72, the relationship seen in the X-axis direction will be described below. This will be described using sex.

  In the following description and FIGS. 20 to 22, the size dimension in the X-axis direction (or Y-axis direction) of the movable stage 52, that is, the range (predetermined range) in which the movement restricting portion 72 is movable is denoted by the symbol L. Show. In addition, the opening length of the receiving recess 76 in the X-axis direction (or Y-axis direction) (the size of the recess opening 76a) is indicated by the symbol W, and the depth of the receiving recess 76 (as viewed in the Z-axis direction). The size H) is indicated by the symbol H. Further, the diameter dimension of the protruding end portion 72a of the movement restricting portion 72 is indicated by a symbol D, and the radius thereof is indicated by a symbol r (= D / 2). The angle with respect to the XY plane of the side surface (hereinafter also referred to as the inclined surface 76d) of each cone hole portion 76b of the receiving recess 76 is indicated by a symbol θ, and the angle of each inclined surface 76d with respect to the Z-axis direction is indicated by a symbol α ( = 90−θ). The opening length in the X-axis direction (or Y-axis direction) of each conical hole 76b of the receiving recess 76, that is, the size dimension in the X-axis direction (or Y-axis direction) of each receiving region 76c is denoted by C. The length dimension of each inclined surface 76d of the receiving recess 76 is indicated by the symbol k. The smallest movement amount in the Z-axis direction of the movement restricting portion 72 (projecting end portion 72a) is indicated by a symbol S.

  First, in the receiving recess 76, the receiving recess 76 with respect to the protruding end 72a can be received regardless of the position of the movement restricting portion 72 that relatively changes in the X-axis direction. The opening length W (the size of the recess opening 76a) is set. For this reason, in this embodiment, regardless of the position of the movement restricting portion 72 that relatively changes in the X-axis direction, the opposing surface 72b (surface) of the protruding end 72a of the movement restricting portion 72 is any one. The opening length W of the receiving recess 76 is set from the viewpoint of enabling contact with the inclined surface 76d of the two conical holes 76b. From this, the opening length W is assumed to be larger than the maximum movement amount L of the movable stage 52 plus the length dimension E at the left and right ends, as shown in FIG.

W> L + 2E (2)
From the above viewpoint, the length dimension E is, as shown in FIG. 21, a movement restricting portion 72 located at the extreme end of the movable range (in the illustrated example, the right end (end on the negative side in the X-axis direction)). Is moved in the optical axis direction, the spherical opposing surface 72b of the projecting end 72a is brought into contact with the inclined surface 76d of the conical hole 76b at the right end of the receiving recess 76. In order to satisfy this condition, in this embodiment, in order to make the inclined surface 76d a flat surface including a tangent to the opposing surface 72b of the projecting end portion 72a, the angle θ of the inclined surface 76d with respect to the XY plane and the movement restriction location 72 The length dimension E is set in association with the diameter dimension D of the protruding end portion 72a. Here, when an auxiliary line passing through the position (contact point) where the inclined surface 76d and the opposing surface 72b contact is drawn from the center of the protruding end portion 72a of the movement restricting portion 72, the angle θ (with respect to the XY plane of the inclined surface 76d) The angle α) with respect to the X-axis direction can be related to the length dimension E. Thereby, the length dimension E can be expressed by the following equation (3).

  For this reason, the opening length W of the receiving recess 76 can be expressed by the following equation (4) from the equations (2) and (3).

W> L + Dsin θ (4)
Further, in the configuration described above and the setting condition of the equation (4), the depth dimension H of the receiving recess 76 can be expressed by the following equation (5) from the relationship shown in FIG.

H = ksinθ (5)
Similarly, the opening length C of each cone hole portion 76b of the receiving recess 76 (the size of each receiving region 76c) can be expressed by the following equation (6) from the relationship shown in FIG.

C = 2 × k cos θ (6)
Here, from the relationship shown in FIG. 20, the opening length W of the receiving recess 76 is multiplied by the opening length C of the cone hole portion 76b by the number n of the cone hole portions 76b (n = 2 in this embodiment). Therefore, it can be expressed by the following formula (7).

W = nC = 2nk cos θ (7)
For this reason, the depth dimension H of the receiving recess 76 can be expressed by the following equation (8) from the equations (5) and (7).

  The movement restricting portion 72 is moved from the negative side to the positive side in the Z-axis direction with respect to such a receiving recess 76, and the opposing surface 72b of the protruding end portion 72a is set to any one of the cone hole portions 76b. The movement of the movable stage 52 with respect to the base plate 48 is regulated as described later by bringing it into contact with the left and right (four actually existing in the X-axis and Y-axis directions) inclined surfaces 76d (see FIG. 22). It can be set as a movement control state (mechanical holding state). Further, the movement restricting portion 72 is moved from the positive side to the negative side in the Z-axis direction with respect to the receiving recess 76, and the projecting end portion 72a is outward with respect to any cone hole portion 76b. By being present, the movement restricted state (mechanical holding state) can be released (see the protruding end portion 72a indicated by the two-dot chain line in FIG. 22). For this reason, in the above-described configuration and the setting condition of the expression (4), when the movement amount S of the movement restriction location 72 is the smallest, the movement restriction location 72 is outside the receiving recess 76 (upward in the drawing). (Refer to the protruding end portion 72a indicated by a two-dot chain line in FIG. 22) and the opposed surface 72b of the protruding end portion 72a of the movement restricting portion 72 are in contact with the left and right inclined surfaces 76d of the conical hole portion 76b of the receiving recess 76. Between the state. Here, as shown in FIG. 22, the receiving recess 76 is formed from the tip of the protruding end 72 a of the movement restricting portion 72 in a state where the opposing surface 72 b of the protruding end 72 a is in contact with both inclined surfaces 76 d of the receiving recess 76. When the distance seen in the Z-axis direction to the deepest position (the apex of the cone hole portion 76b (end on the positive side in the Z-axis direction)) is F, the movement amount S of the movement restricting portion 72 is expressed by the following equation (9) Can be expressed as

S> H−F (9)
In the state where the opposing surface 72b of the projecting end 72a of the movement restricting portion 72 is in contact with both inclined surfaces 76d of the receiving recess 76, the deepest position of the receiving recess 76 from the center of the projecting end 72a of the movement restricting location 72 (positive Assuming that the distance to the tip of the quadrangular pyramid is I, the following equation (10) is established as seen from the triangles P1-P2-P3.

r = I cos θ (10)
Here, the interval F described above can be expressed by the following equation (11) from the positional relationship of FIG.

  For this reason, the movement amount S of the movement restriction location 72 can be expressed by the following equation (12) from the equations (8), (9), and (11).

  In the receiving recess 76, the recess opening 76a (the opening length W of the receiving recess 76) is set to be larger than a movable range (predetermined range) along the XY plane of the movable stage 52, and the recessed portion. Since the opening 76a is divided to form a plurality of receiving regions 76c (conical hole portions 76b), the movable stage 52 is positioned at the positive position in the Z-axis direction of the movement restricting portion 72 (projecting end portion 72a). Any one of the conical hole portions 76b (receiving region 76c) can exist depending on the position within the predetermined range. For this reason, the receiving recess 76 has any one of the conical hole portions 76b (acceptance) even if the movable stage 52 is located at any position within the predetermined range along the XY plane. The protruding end 72a of the movement restricting portion 72 can be received in the region 76c).

  In particular, in the present embodiment, the receiving recess 76 is set so that the opening length W satisfies the formula (4) in the above-described configuration, so that the movable stage 52 is located at any position within the predetermined range. Even when the movement restricting portion 72 moves from the negative side to the positive side in the Z-axis direction, the spherical opposing surface 72b of the projecting end portion 72a of the one of the conical hole portions 76b The inclined surface 76d can be contacted. For this reason, the center position of the cone hole portion 76b as viewed in the XY plane is determined by the guide action between the opposing surface 72b of the protruding end portion 72a and the inclined surface 76d in contact therewith. 72a), the movable stage 52 is displaced so as to coincide with the center position, and the opposed surface 72b of the projecting end 72a comes into contact with each inclined surface 76d of the corresponding cone hole 76b. For this reason, when the movement restricting portion 72 is pressed against the movable stage 52, the protruding end portion 72a enters into any one of the conical hole portions 76b of the receiving recess 76, and its four inclined surfaces 76d. The opposed surface 72b comes into contact with a plane along the XY plane.

  At this time, in the above-described configuration, the depth dimension H of the receiving recess 76 can be expressed by Expression (8). Therefore, the number n of the conical hole portions 76b (receiving regions 76c) in the receiving recess 76 is increased. The depth dimension H of the receiving recess 76 can be reduced more and more. Similarly, since the movement amount S required for the movement restriction location 72 can be expressed by the equation (12), the movement n increases as the number n of the cone hole portions 76b (receiving regions 76c) in the receiving recesses 76 is increased. The amount of movement S of the restriction location 72 can be reduced.

  Next, the attachment state of the holding mechanism 70 to the base plate 48 will be described. As described above, the holding shaft 74 (see FIGS. 14 and 15 and the like) to which the second torsion spring 75 is attached in association with the movement restricting member 71 is installed on the base plate 48 as shown in FIG. It is attached to 48a. The pressing shaft 74 is provided at the installation portion 48a with the neck portion 74b inserted into the third bearing 48d and the leg portion 74d inserted into the fourth bearing 48e. Here, since the third bearing 48d and the fourth bearing 48e are provided on the same line extending in the Y-axis direction, the pressing shaft 74 can rotate around the Y-axis direction in the installation portion 48a (hereinafter referred to as the axis). Is also referred to as rotation around the Y-axis direction). Further, since the neck 74b is fitted into the third bearing 48d and the leg 74d is inserted into the fourth bearing 48e, the pressing shaft 74 is prevented from falling off the installation portion 48a. For this reason, the pressing shaft 74 is fixed to the installation portion 48a so as to be rotatable around the Y-axis direction. The other end 75 c of the second torsion spring 75 attached to the pressing shaft 74 is fixed to the base plate 48.

  Further, as described above, the movement restricting member 71 (see FIG. 12) to which the second torsion spring 75 is associated and the first torsion spring 73 is attached is provided with an installation portion provided on the base plate 48 as shown in FIG. It is attached to 48a. The movement restricting member 71 is provided at the installation portion 48a with the rotation shaft portion 82b inserted into the first bearing 48b and the rotation shaft portion 82a inserted into the second bearing 48c although not clearly shown. Here, since the first bearing 48b and the second bearing 48c are provided on the same line extending in the X-axis direction, the movement restricting member 71 causes the axis Ad (see FIG. 11 and the like) to extend along the X-axis direction. Provided on the installation portion 48a (base plate 48). For this reason, the movement restricting member 71 is rotatable in the installation portion 48a about the X axis direction (hereinafter also referred to as rotation around the X axis direction) (see FIG. 17A). The other end 73c of the first torsion spring 73 attached to the movement restricting member 71 is fixed to the base plate 48 although it is not clearly shown.

  At this time, as described above, the leg portion 74d of the pressing shaft 74 that is rotatably fixed to the installation portion 48a is provided with the positioning surface 85a of the protruding portion 85 of the movement restricting member 71 and the protruding base of the second rotational force receiving portion 86. It passes between the positioning surface 86e of the portion 86a. Further, one end portion 75b of the second torsion spring 75 provided on the pressing shaft 74 is addressed to the hooking portion 86c of the second rotational force receiving portion 86 of the movement restricting member 71 (FIGS. 7 and 15). (See FIGS. 23, 24, 25, etc.)

  Thereafter, a pressing plate 77 is attached to the base plate 48 (see FIG. 17B). The pressing plate 77 has a thin plate shape and can cover at least the open end of the first bearing 48b on the negative side in the Z-axis direction (see FIG. 17B). For this reason, the movement restricting member 71 can be rotated around the X-axis direction and is prevented from dropping off from the installation portion 48 a and is attached to the base plate 48. That is, the movement restricting member 71 is fixed to the installation portion 48a so as to be rotatable around the X-axis direction. In this movement restricting member 71, since the rotation restricting portion 82c is provided in the rotating shaft portion 82b inserted into the first bearing 48b, the rotatable range around the X-axis direction is limited. The rotation range is such that at least the movement restriction point 72 of the movement restriction member 71 can be pressed against the movable stage 52 (receiving recess 76) (see FIG. 24) and the movement restriction point 72 is movable. And a posture (see FIG. 25) that can be separated from the stage 52 (receiving recess 76). In other words, this rotatable range is adapted to the movement amount S of the movement restriction location 72 set to satisfy the equation (12). Further, in the movement restricting member 71, the leg portion 74 d of the holding shaft 74 fixed to the installation portion 48 a as described above, the positioning surface 85 a of the protruding portion 85 of the movement restricting member 71 and the second rotational force receiving portion 86. The contact with the positioning surface 86e of the protruding base portion 86a prevents the movement in the X-axis direction within the installation portion 48a.

  In this state, in the second torsion spring 75, as described above, the tip end portion 75d of the one end portion 75b addressed to the hooking location 86c is advanced beyond the hooking location 86c (FIGS. 14 and 15). And FIG. 23 etc.). As shown in FIGS. 26 (a) and 27 (a), the distal end portion 75d has a positional relationship overlapping the first liner 43 as the movable optical accommodation member 49 when viewed from the negative side in the Z-axis direction. ing. Further, as shown in FIGS. 23A and 27B, the tip portion 75d interferes with the first liner 43 (rear end surface) in the retracted position (stored state) when viewed in the Z-axis direction. In addition, as shown in FIGS. 23B and 26B, the positional relationship is such that interference is eliminated when the first liner 43 is extended. Further, in the second torsion spring 75, when the tip portion 75d interferes with the first liner 43 (rear end surface) in the retracted position (retracted state), the tip portion 75d moves toward the negative side in the Z-axis direction. Along with the displacement, the positional relationship is such that the one end portion 75b is separated from the hooking point 86c to the negative side in the Z-axis direction (see FIGS. 23A, 24, 27B, etc.).

  In the holding mechanism 70, regardless of the position of the first liner 43 as the movable optical housing member 49, the first torsion spring 73 is a helical portion 73 a and the first attachment location 87 of the rotation shaft portion 82 a of the movement restricting member 71. Since the one end portion 73b is inserted into the hooking groove 84b of the hooking piece 84a of the first rotational force receiving portion 84 and the other end portion 73c is fixed to the base plate 48, the other end portion 73c is used as a base point. Then, the hook piece 84a (hook groove 84b) to which the one end portion 73b is attached is pushed to the negative side in the Z-axis direction (see reference numeral F1 ′ shown in FIG. 24). For this reason, as shown in FIGS. 23 to 25, the movement restricting member 71 is moved from the first torsion spring 73 to the movement restricting portion 72 around the X-axis direction within the installation portion 48 a. A “pushing force F1” in the direction of pressing against the receiving recess 76) is applied. For this reason, the first torsion spring 73 applies a “pressing force F1” around the axis Ad (forward rotation direction) to the movement regulating member 71 toward the side where the movement regulating portion 72 is pressed against the movable stage 52. 1 Functions as an elastic member.

  Further, in the holding mechanism 70, when the first liner 43 as the movable optical accommodation member 49 is set to the extended position (shooting standby state), the second torsion spring 75 is a helical portion 75a and the body portion of the pressing shaft 74. While surrounding 74c, one end portion 75b is addressed to the hooking portion 86c of the second rotational force receiving portion 86, and the other end portion 75c is fixed to the base plate 48. The hooking portion 86c to which the portion 75b is addressed is pushed toward the positive side in the Z-axis direction (see reference numeral F2 ′ shown in FIG. 25). For this reason, as shown in FIGS. 23B and 25, the movement restricting member 71 is resistant to the “pressing force F <b> 1” around the X-axis direction from the second torsion spring 75 in the installation portion 48 a. "Pushing force F2" in the direction to be applied is applied. Here, since the elastic force in the second torsion spring 75 is set larger than the elastic force in the first torsion spring 73, the holding mechanism 70 subtracts the “pushing force F1” from the “pushing force F2”. By pushing (rotating) the movement restricting member 71 with force, the movement restricting portion 72 is not pressed against the movable stage 52 (its receiving recess 76). Thus, in the holding mechanism 70, the state in which the “pushing force F1” substantially pushes (rotates) the movement restricting member 71 is released. For this reason, the second torsion spring 75 rotates around the axis Ad (reverse direction) toward the side that separates the movement restricting portion 72 from the movable stage 52 (the direction against the “pushing force F1”) with respect to the movement restricting member 71. It functions as a second elastic member that imparts a “pushing force F2”. In the movement restricting member 71, the hooking portion 86c is pushed from the second torsion spring 75 (one end portion 75b) thereof to the positive side in the Z-axis direction (see reference numeral F2 ′ shown in FIG. 25). The hooking portion 86c is inclined by rotating around (Ad). However, since the hooking portion 86c is provided with the drop-off preventing piece 86d, the one end portion 75b is prevented from dropping from the hooking portion 86c. (See FIG. 23B and FIG. 25).

  Further, in the holding mechanism 70, as shown in FIGS. 23 (a), 24, and 27 (b), the first liner 43 as the movable optical accommodation member 49 moves toward the retracted position toward the negative side in the Z-axis direction. The tip end portion 75d of the one end portion 75b of the second torsion spring 75 interferes with the rear end face. Here, in the second torsion spring 75, the elastic force is set to be smaller than the moving force of the movable optical housing member 49 (first liner 43) to the negative side in the Z-axis direction, and is installed with the above-described configuration. Since the tip portion 75d is pushed by the first liner 43 (rear end surface) that moves to the Z-axis direction negative side, the tip portion 75d, that is, the one end portion 75b is on the Z-axis direction negative side. It is displaced to. Then, in the second torsion spring 75, in a state where the tip portion 75d interferes with the first liner 43 (rear end surface) that is in the retracted position, the tip portion 75d is displaced in the Z-axis direction negative side. Since the one end 75b moves to the negative side in the Z-axis direction and is separated from the catching point 86c, the “pressing force F2” is not applied from the second torsion spring 75 to the movement restricting member 71. As described above, in the holding mechanism 70, the state in which the “pushing force F2” is pressing (rotating) the movement restricting member 71 is released. For this reason, in the holding mechanism 70, the movement regulating member 72 is pressed against the movable stage 52 (its receiving recess 76) by pushing (rotating) the movement regulating member 71 with the "pushing force F1". . Accordingly, when the first liner 43 as the movable optical accommodation member 49 moves toward the retracted position (accommodated state) toward the negative side in the Z-axis direction, the distal end portion 75d (second torsion spring 75 (one end thereof) is moved. The force that pushes the portion 75b)) toward the negative side in the Z-axis direction functions as the “pushing force F3” from the movable optical housing member 49. Further, one end 75b (including the tip portion 75d) of the second torsion spring 75 is pressed against the movement restricting member 71 so as to apply a force for rotating the movement restricting member 71 in the release direction, and is moved to the retracted position. When it interferes with the movable optical housing member 49 (first liner 43), it functions as a pressing point that is separated from the hooking point 86c (movement restricting member 71).

  As described above, in the holding mechanism 70, when the movable optical housing member 49 is in the extended position (shooting standby state), the first liner 43 (rear end surface) and the front end portion 75d do not interfere with each other. With the “pushing force F2” from the second torsion spring 75 larger than the “pushing force F1” from the first torsion spring 73 that rotates the member 71 in the forward rotation direction, the movement restricting member 71 is substantially moved in the reverse direction. The movement restricting portion 72 of the movement restricting member 71 is removed from the receiving recess 76 of the movable stage 52, and the movable stage 52 is made movable.

  Further, in the holding mechanism 70, when the movable optical accommodation member 49 is in the retracted position (accommodated state), the second torsion spring 75 restricts movement by causing the first liner 43 (rear end surface) and the front end portion 75d to interfere with each other. The “pressing force F3” from the first liner 43 that is larger than the “pressing force F2” that rotates the member 71 in the reverse direction is negative in the Z-axis direction of the tip portion 75d (one end portion 75b) of the second torsion spring 75. Assuming that the “pushing force F2” from the one end 75b does not act on the hooking portion 86c, the movement restricting member 71 is moved in the forward rotation direction by the “pushing force F1” from the first torsion spring 73. By rotating, the movement restricting portion 72 of the movement restricting member 71 enters the receiving recess 76 of the movable stage 52, and the movable stage 52 is fixed.

  Next, the operation of the holding mechanism 70 accompanying the operation of the imaging unit 13 will be described. In the imaging unit 13 (the digital camera 10 (see FIG. 1)), when the photographing standby state (the extended position (see FIG. 5)) is set, the first liner 43 (movable optical housing member) in the fixed cylinder portion 41a. 49) is a position protruding (displaced) to the side opposite to the base plate 48 (subject side). At this time, in the holding mechanism 70, as described above, the state in which the “pressing force F1” is substantially pressing (rotating) the movement restricting member 71 is released, and the “pressing force F2” is changed to the “pressing force”. By pushing (rotating) the movement restricting member 71 with the force obtained by subtracting “F1”, the movement restricting portion 72 is not pressed against the movable stage 52 (see FIGS. 23B, 25 and 26). . At this time, the movable stage 52 (imaging element 22) is movable along the XY plane, and the camera shake correction mechanism 50 is in an operable state. Hereinafter, this is referred to as a non-holding state. In the non-holding state, in the digital camera 10, an image acquired under the control of the control unit 21 is displayed on the display unit 24 (see FIG. 2) to enter a live view state (monitoring state). Perform image stabilization. Although not shown in the drawings, the digital camera 10 is provided with a camera shake correction switch for selecting whether or not to perform camera shake correction. When the camera shake correction switch is OFF in the above-described live view state, the camera shake correction mechanism 50 operates. A configuration may be adopted in which the camera shake correction by the camera shake correction mechanism 50 is executed immediately when the camera shake correction switch is turned on without executing the camera shake correction.

  In the imaging unit 13 (digital camera 10 (see FIG. 1)), if there is a request for transition from the shooting standby state (feeding position (see FIG. 5)) to the retracted state (collapsed position (see FIG. 4)), the lens mirror The driving force of the barrel drive unit 23 (see FIG. 2) (the motor thereof) is appropriately transmitted to the gear, and as described above, the movable optical housing member 49 including the first liner 43 is fixed to the fixed frame 41 (the fixed cylinder portion 41a). ). Thereby, in the imaging unit 13, each optical member of the photographing optical system 12 (see FIG. 1) moves in a predetermined manner and shifts to the housed state (see FIG. 4). Then, in the holding mechanism 70, as described above, the distal end portion 75d of the one end portion 75b of the second torsion spring 75 interferes with the first liner 43 (rear end surface), and the “pressing force F3” causes the Z axis direction negative side. As a result, the state in which the “pushing force F2” substantially pushes (rotates) the movement regulating member 71 is released, and the movement regulating member 71 is pushed (rotated) by the “pushing force F1”. As a result, the movement restricting portion 72 is pressed against the movable stage 52 (see FIGS. 23A, 24, and 27). At this time, the movable stage 52 has the protruding end 72a of the movement restricting location 72 and the receiving recess 76 (the recess opening 76a) set as described above. The portion 72a enters into any one of the receiving regions 76c of the receiving recess 76, and the opposing surface 72b is pressed against each inclined surface 76d, thereby restricting movement relative to the base plate 48 (FIG. 23 ( a) and FIG. 24). Hereinafter, this is referred to as a holding state, and a state in which the movement restricting portion 72 of the movement restricting member 71 is pressed into the receiving recess 76 is referred to as a mechanical holding. That is, in the digital camera 10, the movable optical housing member 49 (shooting optical system 12) is moved from the extended position (shooting standby state (see FIG. 5)) to the retracted position (stored) by the housing member drive unit (lens barrel drive unit 23). When the state (see FIG. 4) is established, the movement restricting member 71 of the holding mechanism 70 bridges the base plate 48 and the movable stage 52, so that it is perpendicular to the photographing optical axis OA (Z axis) of the movable stage 52. The movement (movement along the XY plane) with respect to is mechanically restricted. At this time, in the digital camera 10, the image display on the display unit 24 (see FIG. 2) is also stopped.

  In the imaging unit 13 of the above-described embodiment, the recess opening 76a of the receiving recess 76 (opening length W of the receiving recess 76) is from a movable range (predetermined range) along the XY plane of the movable stage 52. Therefore, even if the movable stage 52 is in any position within a predetermined range, the movement restricting portion 72 can be received by the receiving recess 76. For this reason, when the movable optical housing member 49 (shooting optical system 12) is set to the retracted position (stored state (see FIG. 4)), it is not necessary to move the movable stage 52 to a predetermined position. In addition, the movable stage 52 can be brought into a movement restricted state (mechanical holding state). Further, it is possible to simplify the control when the movable optical housing member 49 (the photographing optical system 12) is set to the retracted position (stored state (see FIG. 4)).

  Further, in the imaging unit 13 of the above-described embodiment, the recessed openings 76a of the receiving recess 76 are divided to form a plurality of receiving areas 76c, and the conical hole part 76b having each receiving area 76c as a bottom surface. Since the receiving recess 76 is constituted by the Z-axis of the movement restricting portion 72 (its projecting end portion 72a) even when the movable stage 52 is in any position within the predetermined range. Any one of the conical hole portions 76b (receiving region 76c) can be present at a position on the positive direction side. For this reason, even if the movable stage 52 is in any position within the predetermined range, the movement restricting portion 72 at any one of the conical hole portions 76b (the receiving region 76c) of the receiving recess 76. The protruding end portion 72a can be reliably received.

  Furthermore, in the imaging unit 13 of the above-described embodiment, the receiving recess 76 is configured by the conical hole portion 76b whose bottom surface is the plurality of receiving regions 76c formed by dividing the recess opening 76a. The depth dimension H of the receiving recess 76 can be reduced as compared with a single conical hole. That is, if only the recess opening 76a (opening length W of the receiving recess 76) is widened, an increase in the depth dimension H of the receiving recess 76 will be caused. Since the receiving recess 76 is configured, the movement restricting portion 72 can be received by the receiving recess 76 even when the movable stage 52 is in any position within a predetermined range. The depth dimension H of the receiving recess 76 can be reduced. For this reason, since the thickness in the direction (in the present embodiment, the optical axis direction) for receiving the movement restricting portion 72 having a configuration necessary only for mechanical holding can be reduced, the density can be increased by downsizing and thinning. Even in a mounted digital camera, a structure for mechanical holding can be provided without interfering with surrounding components and wiring.

  In the imaging unit 13 of the above-described embodiment, the receiving recess 76 is configured by the cone hole portion 76b whose bottom surface is the plurality of receiving regions 76c formed by dividing the recess opening 76a. The movement amount S required for the movement restriction location 72 can be reduced as compared with the case where the receiving recess 76 is configured by the conical hole. For this reason, since the thickness seen in the moving direction (in this embodiment, the optical axis direction) of the movement restricting portion 72 having a configuration necessary only for mechanical holding can be reduced, the size and thickness can be reduced. Even in a digital camera on which high-density mounting is performed, a structure for mechanical holding can be provided without interfering with surrounding parts, wiring, and the like.

  In the imaging unit 13 according to the above-described embodiment, the amount of movement S necessary for the movement restriction location 72 is reduced. It is possible to reduce the maximum amount of force in the first torsion spring 73 (first elastic member).

  In the imaging unit 13 of the above-described embodiment, the number of cone hole portions 76b constituting the receiving recess 76 (in this embodiment, two in the X-axis direction and the Y-axis direction, a total of four) is increased. Thus, the depth dimension H of the receiving recess 76 and the amount of movement S of the movement restricting portion 72 can be reduced, so that the movable stage 52 is in any position within a predetermined range. The thickness dimension seen in the moving direction (in this embodiment, the optical axis direction) of the movement restricting portion 72 having a configuration necessary only for mechanical holding while allowing the movement restricting portion 72 to be received by the receiving recess 76. It can be easily adjusted (set).

  In the imaging unit 13 of the above-described embodiment, since the opening length W of the receiving recess 76 satisfies the formula (4), the movable stage 52 is set at any position within the predetermined range. Even in this case, when the movement restricting portion 72 is pressed against the movable stage 52, the spherical opposing surface 72b of the protruding end portion 72a is reliably brought into contact with the inclined surface 76d of any one of the cone hole portions 76b. Can be made.

  In the imaging unit 13 of the above-described embodiment, the opening length W of the receiving recess 76 satisfies the formula (4), and each cone hole 76b of the receiving recess 76 is negative in the Z-axis direction. Since the cross-sectional area is gradually reduced from the side toward the positive side, the movement restricting portion 72 is pressed against the movable stage 52 and the spherical opposing surface 72b of the protruding end 72a is formed. When it comes into contact with the inclined surface 76d of any one of the cone hole portions 76b, the guiding action of the opposing surface 72b of the protruding end portion 72a and the inclined surface 76d in contact with the inclined surface 76d causes the The movable stage 52 is displaced so that the center position of the cone hole portion 76b coincides with the center position of the protruding end portion 72a of the movement restricting portion 72, and the opposing surface 72b of the protruding end portion 72a is made to correspond to the corresponding cone hole portion 76b. In contact with each inclined surface 76d Rukoto can. For this reason, since the protruding end portion 72a of the movement restricting portion 72 enters the corresponding cone hole portion 76b, the opposing surface 72b comes into contact with each inclined surface 76d on a plane along the XY plane. The movable stage 52 that is movable along the XY plane can be stably mechanically held, and the movement of the movable stage 52 in the direction along the XY plane can be reliably prevented. .

  In the imaging unit 13 of the above-described embodiment, the receiving recess 76 is formed by the pyramidal hole portion 76b having a quadrangular pyramid shape with the plurality of receiving regions 76c formed by dividing the recess opening 76a of the receiving recess 76. Therefore, the opposing surface 72b of the protruding end portion 72a of the movement restricting portion 72 received by any one of the conical hole portions 76b (receiving region 76c) of the receiving recess 76 is formed on the XY plane. Since the four inclined surfaces 76d can be brought into contact with each other on the plane along the plane, the movable stage 52 movable along the XY plane can be mechanically held more stably, and the XY plane can be held. The movement of the movable stage 52 in the direction along the direction can be more reliably prevented.

  In the imaging unit 13 of the above-described embodiment, since the recess opening 76a of the receiving recess 76 is a rectangular shape having sides parallel to the X-axis direction and the Y-axis direction, similarly, in the X-axis direction and the Y-axis direction. Regardless of the position of the movable stage 52 that is movable within a predetermined range of a rectangular shape having parallel sides, the movement restricting portion 72 (its projecting end portion 72a) is connected to the receiving recess 76 (any one cone thereof). It is possible to more efficiently form the structure in which the hole portion 76b (receiving region 76c) is reliably received.

  In the imaging unit 13 of the above-described embodiment, the rectangular recess opening 76a having sides parallel to the X-axis direction and the Y-axis direction is formed into a rectangular shape having sides parallel to the X-axis direction and the Y-axis direction. Since the receiving region 76c (cone hole portion 76b) is formed by being divided into shapes, the receiving region 76c (cone hole portion 76b) can be formed without a gap in the recess opening 76a. It can be set as the structure which receives the protrusion edge part 72a of the movement control location 72 reliably in any one cone hole part 76b (receiving area | region 76c).

  In the imaging unit 13 of the above-described embodiment, the recess opening 76a has a square shape having sides parallel to the X-axis direction and the Y-axis direction, and each receiving region 76c has sides parallel to the X-axis direction and the Y-axis direction. Since each of the conical hole portions 76b has a regular quadrangular pyramid shape and the protruding end portion 72a of the movement restricting portion 72 has a hemispherical shape, any of the inclined surfaces 76d of any of the conical hole portions 76b. Since the opposing surface 72b of the projecting end portion 72a can be brought into contact with each other equally, it is possible to shift to a mechanical holding state more stably.

  In the imaging unit 13 of the above-described embodiment, the inclined surface 76d of each conical hole portion 76b of the recess opening 76a is a flat surface including a tangent to the spherical opposing surface 72b of the protruding end portion 72a of the movement restricting portion 72. As described above, since the angle θ of the inclined surface 76d with respect to the XY plane and the diameter dimension D of the movement restricting portion 72 (projecting end portion 72a) are set, the movement restricting portion 72 is pressed against the movable stage 52. Then, while suppressing the increase in the opening length W of the receiving recess 76 (the size of the recess opening 76a), the opposing surface 72b of the protruding end 72a is the inclined surface of any one of the cone hole portions 76b. In addition to being able to contact reliably by 76d, it is possible to more reliably obtain the guiding action of the opposed surface 72b of the projecting end 72a and the inclined surface 76d due to the contact.

  In the imaging unit 13 of the above-described embodiment, when the photographing optical system 12 is in the housed state, the holding mechanism 70 is moved from the feeding position of the first liner 43 (rear end surface) as the movable optical housing member 49 of the photographing optical system 12. The “pushing force F2” is released by the “pushing force F3” accompanying the movement to the retracted position (the negative side in the Z-axis direction), and the “pushing force F2” is removed from the second torsion spring 75 (second elastic member). ) Is applied to the movement restricting member 71, so that the movable stage 52 is shifted to mechanical holding or in the mechanical holding state in the first liner 43 (movable optical housing member 49) in the XY direction. Can be prevented from acting, and the pressing force to the first liner 43 (movable optical housing member 49) in the Z-axis direction can be reduced.

  In the imaging unit 13 of the above-described embodiment, the holding mechanism 70 applies the “pressing force F1” that presses the movement restricting portion 72 against the movable stage 52 to the movement restricting member 71 by the first torsion spring 73 (first elastic member). Therefore, in the transition to the mechanical holding state of the movable stage 52 or in the mechanical holding state, the pushing force to the movable stage 52 in the Z-axis direction can be reduced, and the first torsion spring 73 is provided. By making this elastic force appropriate, it is possible to prevent a change in the optical positional relationship between the imaging element 22 held by the movable stage 52 and the imaging optical system 12.

  In the imaging unit 13 according to the above-described embodiment, the holding mechanism 70 uses the “pushing force F3” accompanying the movement of the movable optical housing member 49 (first liner 43 in the embodiment) to the negative side in the Z-axis direction. By releasing "F2" and releasing the "pushing force F2", the "pushing force F1" substantially pushes (rotates) the movement restricting member 71, thereby fixing the movable stage 52. Since it is (mechanically held), the “pushing force F3” accompanying the movement of the movable optical accommodation member 49 to the negative side in the Z-axis direction does not directly act on the movable stage 52. Therefore, the movable optical accommodation member It is possible to prevent an excessive force from acting on both 49 and the movable stage 52.

  In the imaging unit 13 of the above-described embodiment, the holding mechanism 70 pushes the movement restricting portion 72 to the movable stage 52 by the “pushing force F1” applied to the movement restricting member 71 from the first torsion spring 73 (first elastic member). By applying, the movable stage 52, that is, the imaging device 22 is fixed, so that it is possible to prevent occurrence of a collision sound and an impact due to unexpected movement of the movable stage 52 without consuming electric power.

  In the imaging unit 13 of the above-described embodiment, when the photographing optical system 12 is in the retracted state, the holding mechanism 70 is moved in the Z-axis direction (the photographing optical axis OA direction) between the retracted position and the extended position. Non-holding by using “pushing force F3” accompanying the movement of the first liner 43 as the movable optical accommodation member 49 that approaches or moves away from the base plate 48 to the negative side in the Z-axis direction. Since the state and the mechanical holding state are shifted, it is not necessary to use a new drive mechanism only for the mechanical holding.

  In the imaging unit 13 of the above-described embodiment, the holding mechanism 70 moves the movement restricting portion 72 of the movement restricting member 71 into the receiving recess 76 of the movable stage 52 in the direction of the photographing optical axis OA (Z-axis direction). Since the two cone holes 76b) are pressed against each other, it is possible to reliably prevent the movable stage 52 from moving in the direction along the XY plane at the pair of movement restricting points 72 and the receiving recesses 76. it can.

  In the digital camera 10 provided with the imaging unit 13 of the above-described embodiment, it is possible to suppress power consumption and to prevent occurrence of a collision sound and an impact due to unexpected movement of the movable stage 52, which is favorable. Images can be acquired.

  Therefore, in the imaging unit 13 according to the present invention, regardless of the position of the movable stage 52, the movable stage 52 can be in a movement restricted state (mechanical holding state).

  In the above-described embodiment, the imaging unit 13 as an example of the imaging unit according to the present invention has been described. A storage stage that includes a movable stage that can move along the plane to move within a range, and retracts at least some of the plurality of optical members of the photographing optical system to store the optical members; and the storage state An imaging unit capable of shifting to a shooting standby state in which at least a part of each of the optical members is moved to the subject side, a plurality of optical housing members that house the optical members, and the optical housing members A housing member driving unit that drives the movable stage, a movement regulating member that regulates movement of the movable stage by pressing a movement regulating portion against the movable stage, and the movement regulation that is pressed A receiving recess provided in the movable stage to allow insertion of the location, and the receiving recess is a recess viewed in a plane orthogonal to a movement regulating direction for pressing the movement regulating location against the movable stage. The opening is sized to receive the movement restricting portion regardless of the position of the movable stage within the predetermined range, the recess opening is divided into a plurality of receiving regions, and each receiving region is a bottom surface. Any imaging unit may be used as long as the imaging unit has a plurality of conical holes whose cross-sectional area perpendicular to the movement restriction direction gradually decreases toward the bottom of the receiving recess, and is not limited to the above-described embodiment.

  In the above-described embodiment, the holding mechanism 70 includes the movement restricting member 71, the first torsion spring 73, the pressing shaft 74, and the second torsion spring 75. However, when the photographing optical system 12 is in the retracted state. As long as the movement restricting portion 72 (its protruding end portion 72 a) is pressed against the movable stage 52 so as to be inserted into any one of the conical hole portions 76 b of the receiving recess 76 of the movable stage 52. For example, the distal end portion 75d may interfere with the rear end surface of another member of the movable optical housing member 49, and the moving force of the movable optical housing member 49 to the housed state is utilized by another configuration. There may be a drive source different from the lens barrel drive unit 23 that moves the movable optical storage member 49 to the storage state. It is not limited to the examples.

  Furthermore, in the above-described embodiment, the receiving recess 76 is constituted by the four cone holes 76b. However, if the receiving recess 76 has a plurality of cone holes, the number of the cone holes is appropriately set. What is necessary is just to do and it is not limited to the above-mentioned embodiment.

  In the above-described embodiment, each cone hole 76b of the receiving recess 76 of the movable stage 52 of the holding mechanism 70 has a regular quadrangular pyramid shape, but the movement restricting portion 72 of the movement restricting member 71 (the protruding end portion thereof) 72a), it is possible to prevent the movable stage 52 from moving in the direction along the XY plane, that is, if it interferes with the movement restriction point 72 received in the direction along the XY plane. For example, even if it has a pyramid shape that gradually decreases the cross-sectional area from the negative side to the positive side in the Z-axis direction, the cross-sectional area is gradually decreased from the negative side to the positive side in the Z-axis direction. The shape may be conical and is not limited to the above-described embodiment.

  In the above-described embodiment, the protruding end 72a of the movement restricting portion 72 of the holding mechanism 70 is hemispherical. However, the movable stage is inserted into any one of the conical hole portions 76b of the receiving recess 76. 52 can be prevented from moving in the direction along the XY plane, that is, it can interfere with the cone hole portion 76b inserted in the direction along the XY plane. It is not limited.

  In the above-described embodiment, the holding mechanism 70 is configured by the movement restricting portion 72 including the movement restricting member 71, the first torsion spring 73, the pressing shaft 74, and the second torsion spring 75. The movement restricting portion 72 of the movement restricting member 71 is pressed against the movable stage 52 by the “pressing force F1”, and the pressing of the movement restricting portion 72 to the movable stage 52 by the “pressing force F1” is performed from the second elastic member. The “pushing force F2” is released, and the “pushing force F2” is released using the “pushing force F3” accompanying the movement of the movable optical housing member 49. It is not limited.

  In the above-described embodiment, the image pickup unit 13 is provided in the digital camera 10, but the image pickup unit 13 may be mounted in a portable information terminal device such as a PDA (personal data assistant) incorporating a camera function or a mobile phone. However, the present invention is not limited to the examples. This is because many of such portable information terminal devices have substantially the same functions and configurations as the digital camera 10 although their appearances are slightly different. Similarly, the imaging unit (13) according to the present invention may be employed in an image input device.

  As described above, the imaging unit of the present invention and the imaging device equipped with the imaging unit have been described based on the embodiments. However, the specific configuration is not limited to the embodiments and does not depart from the gist of the present invention. As long as the design is changed or added, it is allowed.

DESCRIPTION OF SYMBOLS 10 Digital camera (as an example of an imaging device) 12 Imaging optical system 13 Imaging unit 22 Imaging element 23 Lens barrel drive unit 36 (as an example of an accommodation member drive part) First (As an example of a movable optical accommodation member) Lens holding frame 37 Second lens holding frame 38 (as an example of a movable optical housing member) Third lens holding frame 39 (as an example of a movable optical housing member) Fourth lens holding (as an example of a movable optical housing member) Frame 41a Fixed cylinder portion 42 (as an example of a movable optical accommodation member) First rotating cylinder 43 (as an example of a movable optical accommodation member) First liner 44 (as an example of a movable optical accommodation member) Second rotating cylinder 45 (as an example of a housing member) Second liner 46 (as an example of a movable optical housing member) (as an example of a movable optical housing member) ) Cam cylinder 47 (as an example of a movable optical housing member) Straight moving cylinder 52 Movable stage 71 Movement restricting member 72 Movement restricting portion 72a Projecting end 72b Opposing surface 76 Receiving recess 76a Recess opening 76b Cone hole 76c Receiving region 76d inclined surface

JP 2010-8658 A

Claims (6)

A movable stage that is movable along a plane in order to move an imaging element that acquires a subject image by the imaging optical system within a predetermined range as viewed in a plane orthogonal to the imaging optical axis; Imaging capable of shifting between a storage state in which at least a part of the optical member is retracted and the optical members are stored, and a standby state in which at least a part of the optical members are moved from the storage state to the subject side A unit,
A plurality of optical housing members for housing the optical members;
A housing member driving section for driving the optical housing members;
A movement restricting member for restricting movement of the movable stage by pressing a movement restricting portion against the movable stage;
A receiving recess provided in the movable stage to allow insertion of the pressed movement restriction portion,
The receiving recess has a recess opening as viewed in a plane orthogonal to a movement restricting direction for pressing the movement restricting portion against the movable stage regardless of the position of the movable stage within the predetermined range. The cross-sectional area that is sized to receive a portion, divides the recess opening into a plurality of receiving regions, sets each receiving region as a bottom surface, and goes to the bottom of the receiving recess, and is orthogonal to the movement restriction direction. An imaging unit comprising a plurality of cone holes that gradually decrease. The predetermined range is a rectangle;
The recess opening is a rectangle having sides parallel to each side in the predetermined range;
The receiving area is formed by equally dividing the recess opening,
The imaging unit according to claim 1, wherein each of the cone holes has a quadrangular pyramid shape. The recess opening is square;
The imaging unit according to claim 2, wherein each of the cone holes has a regular quadrangular pyramid shape. The movement restricting portion has a spherical surface facing the receiving recess,
4. The imaging unit according to claim 3, wherein each of the cone hole portions is a flat surface in which each inclined surface includes a tangent to the opposite surface.   The recess opening has a maximum dimension seen in the direction of each side constituting the square, a maximum dimension of the predetermined range seen in the same direction, and a diameter dimension of the opposing surface to the diameter of the cone hole portion. 5. The imaging unit according to claim 4, wherein each of the inclined surfaces is set to be larger than a value obtained by adding a value obtained by multiplying a cosine of an inclination angle with respect to a surface orthogonal to the movement restriction direction. An imaging apparatus comprising the imaging unit according to any one of claims 1 to 5.