JP2006178006A - Photographing lens unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size, in the external diameter direction and optical axis direction, of an entire lens barrel in a video camera and digital camera in which a zoom lens and focal lens are linearly driven or an attached camera of a portable digital assistant, such as a portable telephone or photographing products. <P>SOLUTION: Coils 42, 52, magnets 45, 55, yokes 44, 54 which are components of a linear motor 41 for zooming for a zoom movable body 31 and a linear motor 51 for focusing for a focus movable body 33 are arranged atop an outside surface of the lens barrel 20 or on one side in the same direction as a direction normal to the moving direction of the zoom movable body 31 and the focus movable body 33 so that the size in the radial direction and axial direction of the lens barrel 20 is reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an imaging lens device and an imaging device using the imaging lens device, and in particular, has a zoom lens and a focus lens, and the zoom lens is moved in the optical axis direction by a zoom moving body, and the focus lens is moved in focus. The present invention relates to an imaging lens device that is moved in the optical axis direction by a body, and an imaging device that uses the imaging lens device.

  Video cameras and digital still cameras have been improved in performance for many themes such as miniaturization and weight reduction, high-magnification zoom, high-speed focus, and high-speed zoom. When configuring a moving lens group of an optical device such as a video camera or a digital still camera, a coil is attached to a zoom moving body having a zoom function or a focus moving body having a focus function in order to drive with high accuracy and high speed. A linear actuator or a linear motor is used in which these coils are linearly driven by a magnetic circuit composed of a magnet and a yoke.

  FIG. 8 shows a configuration example of a typical optical system having a moving lens group of an optical device such as a video camera or a digital still camera. Here, the objective lens 2 is fixedly attached to the front lens barrel 1, the zoom lens 4 is attached to the zoom movable body 3 movable in the optical axis direction, the intermediate fixed lens 6 is fixed to the intermediate lens barrel 5, and thereafter A focus lens 8 is attached to a focus moving body 7 that is movable in the optical axis direction on the side. An imaging element 10 made of a CCD is attached to the rear barrel 9. An iris 11 constituting a diaphragm is disposed in the intermediate fixed lens 6. A pair of upper guide shafts 12 and 13 and a lower guide shaft 14 are provided to move the zoom moving body 3 and the focus moving body 7 in the optical axis direction.

  Such a lens barrel performs image frame setting by zooming by moving the zoom lens 4 by the zoom moving body 3. Further, by moving the focus lens 8 by the focus moving body 7, focus adjustment is performed in accordance with the movement amount of the zoom moving body 3. Further, the optical aperture is automatically adjusted so that the iris 11 can obtain an appropriate exposure. The image light is imaged on the surface of the image sensor 10, and the intensity of the light is converted into an electric signal by the image sensor 10.

  An attempt to reduce the size of a lens barrel having a linear actuator for the moving operation of such a moving body has been proposed in Japanese Patent Application Laid-Open Nos. 11-149030 and 2000-2831. In these proposals, the linear mechanism for moving the moving frame and the arrangement of the shaft for guiding the movement of the moving frame are shaped so as to swell in the outer diameter direction of the lens barrel. Further, there is no improvement or progress in downsizing the entire lens barrel in the optical axis direction.

  Further, when the lens moving frame is driven by the linear actuator, if the center of gravity of the lens moving frame and the action point of the thrust of the linear motor are greatly different, the moving frame cannot be driven stably. Therefore, for example, Japanese Patent Laid-Open No. 2002-214504 proposes to solve this. Here, it has a plurality of linear mechanisms that generate thrust for driving the lens moving frame in the optical axis direction by energizing the coil, and the resultant force of the thrust generated in each of the plurality of linear thrust generators The working point is arranged so as to coincide with the position of the center of gravity of the lens moving frame or so as to be located in the vicinity of the position of the center of gravity. However, such a structure requires a plurality of linear mechanisms, increases the number of parts, and has disadvantages that are disadvantageous for downsizing.

The downsizing of the lens barrel has led to the problem of using a linear actuator as the drive system for the lens moving frame, which has an effect on the magnetoresistive element that detects the position of the lens moving frame. Magnetic leakage. There are two methods for detecting the position of the moving frame: optical and magnetic. The magnetic method is smaller and less expensive than the optical method, and because it is more accurate, a small lens barrel is used. Indispensable. As an example of solving magnetic leakage from a driving magnetic circuit while using a magnetoresistive element for detecting the position of the lens moving frame and using a linear actuator mechanism for driving the lens moving frame, a proposal by Japanese Patent Laid-Open No. 10-225083 is proposed. There is. In this method, two driving magnetic circuits are provided facing each other with respect to one moving frame, and a magnetoresistive element is arranged at the center thereof, thereby mitigating the influence of leakage magnetic flux. However, by providing the two driving magnetic circuits in a face-to-face manner, the outer diameter of the entire lens barrel expands in the direction in which the driving magnetic circuit is arranged, which prevents miniaturization.
JP 11-149030 A JP 2000-2831 A JP 2002-214504 A Japanese Patent Laid-Open No. 10-225083

  SUMMARY OF THE INVENTION An object of the present invention is to provide a high-performance imaging lens device and an imaging device that solve the drawbacks of conventional imaging lens devices.

  Another object of the present invention is to provide an imaging lens device and an imaging device that can be further miniaturized.

  Still another object of the present invention is to provide an imaging lens device and an imaging device that are reduced in weight by reducing the number of components.

  Still another object of the present invention is to provide an imaging lens device and an imaging device in which a lens moving body and a linear motor mechanism for driving the lens moving body are improved.

  Still another object of the present invention is to provide an imaging lens device and an imaging device that achieve an overall miniaturization by devising the arrangement of the guiding spindle that moves the lens moving body.

  The above-described problems and other problems of the present invention will be clarified by the technical idea of the present invention and the embodiments thereof described below.

The main invention of the present application is that the zoom lens is movable in the optical axis direction by the zoom moving body, and is moved in the optical axis direction by the zoom linear motor,
An imaging lens device in which a focus lens is movable in the optical axis direction by a focus moving body and is moved in the optical axis direction by a focusing linear motor,
The zoom linear motor and the focus linear on the outer surface of a substantially rectangular tube-shaped lens barrel constituting the lens apparatus and substantially parallel to the optical axis, or on one side in the normal direction to the optical axis The present invention relates to an imaging lens device characterized by disposing a motor.

  Here, the zoom moving body is guided to be movable in the optical axis direction by the zoom guiding main shaft, the focus moving body is guided to be movable in the optical axis direction by the focus guiding main shaft, and the zoom guiding main shaft and the focus The zoom linear motor and the focus linear motor may be arranged side by side between the guide main shaft. The zoom guide main axis and the focus guide main axis are arranged on a plane substantially parallel to the optical axis on one side in the normal direction with respect to the optical axis, and the plane is substantially parallel to the optical axis. A common guide auxiliary shaft may be arranged at the shifted position, and the zoom moving body and the focus moving body may be guided in common.

  The coil of the zoom linear motor may be arranged on the optical axis side of the zoom guide main shaft in the normal direction to the optical axis. The coil of the focusing linear motor may be arranged on the optical axis side of the focus guiding main axis in the normal direction to the optical axis. Further, the coil of the zoom linear motor is fed by a flexible printed cable attached to the image pickup means side in the optical axis direction of the zoom moving body, and the coil of the focus linear motor is image pickup means in the optical axis direction of the focus moving body. Power may be supplied by a flexible printed cable attached to the opposite side. The yoke of the zoom linear motor and the yoke of the focus linear motor may be received in slits extending in the optical axis direction on the outer surface of the lens barrel and formed in parallel to each other.

  The zoom guide has a magnetoresistive element for detecting the position of the zoom moving body and a magnetoresistive element for detecting the position of the focus moving body, and the zoom guide is interposed between the pair of magnetoresistive elements in a direction perpendicular to the optical axis. A main spindle for focus and a main spindle for focus guidance may be arranged, and the main spindle for zoom guidance and the main spindle for focus guidance may be made of a magnetic material. Further, a magnetoresistive element for detecting the position of the zoom moving body may be disposed on the opposite side of the zoom guiding main shaft from the zoom linear motor. Further, the magnetoresistive element for detecting the position of the focus moving body may be disposed on the opposite side of the focus linear motor from the focus linear motor. In addition, the zoom linear body includes a magnetoresistive element for detecting the position of the zoom moving body and a magnetoresistive element for detecting the position of the focus moving body, and the zoom linear element is interposed between the pair of magnetoresistive elements in a direction orthogonal to the optical axis. A motor and a focusing linear motor may be arranged.

  Further, the zoom linear motor and the focus linear motor may be juxtaposed in parallel on a plane which is substantially parallel to the optical axis and is set on one side in the normal direction to the main axis. Further, the zoom guide main axis and the focus guide main axis may be arranged substantially parallel to each other on a plane that is substantially parallel to the optical axis and set on one side in the normal direction to the optical axis.

  The invention related to the imaging apparatus relates to an imaging apparatus using the imaging lens apparatus according to any one of the above configurations.

  The main invention of the present application is that the zoom lens can be moved in the optical axis direction by the zoom moving body, and can be moved in the optical axis direction by the zoom linear motor, and the focus lens can be moved in the optical axis direction by the focus moving body, In addition, an imaging lens device that is moved in the optical axis direction by a focusing linear motor, and is an outer surface of a substantially rectangular tube-shaped lens barrel constituting the lens device and a surface substantially parallel to the optical axis, or A zoom linear motor and a focus linear motor are arranged on one side of the normal direction with respect to the optical axis.

  Therefore, according to such an imaging lens device, the dimension in the normal direction with respect to the optical axis can be reduced. This makes it possible to provide a smaller imaging lens device.

  The present invention will be described below with reference to embodiments shown in the drawings. 1 to 7 show an imaging lens device according to the present embodiment. As shown in FIGS. 1 and 2, this imaging lens device has an outer casing made of a synthetic resin having a substantially rectangular parallelepiped shape. 20. An opening on the front side of the outer casing 20 is closed by a front plate 21, and a front lens barrel 22 is integrally connected to the front plate 21 as shown in FIGS. 1 to 3. An objective lens 23 is fixedly held on the front lens barrel 22. On the other hand, the opening on the back side of the outer casing 20 is closed by the back plate 24.

  Inside the outer casing 20, a pair of left and right guide main shafts 26 and 27 are disposed on the upper side, and a guide sub shaft 28 is disposed on the lower side. The main shafts 26 and 27 and the auxiliary shaft 28 are supported at the front end portion and the rear end portion thereof by the front plate 21 and the back plate 24, respectively.

  A zoom moving body 31 shown in FIGS. 3 to 5 is attached to be movable in the optical axis direction by the guide main shaft 26 and the guide sub shaft 28. The zoom moving body 31 is a lens frame and holds a zoom lens 32. Further, as shown in FIGS. 3, 4, and 6, the focus moving body 33 is arranged to be movable in the optical axis direction by the guide main shaft 27 and the guide sub shaft 28. The focus lens 34 is fixedly supported by the focus moving body 33.

  In the outer casing 20, a partition wall 36 (see FIG. 3) is fixedly disposed between the lens moving body 31 and the focus moving body 33 at an intermediate position in the optical axis direction. An intermediate lens barrel 37 is provided so as to protrude forward. An intermediate fixed lens 38 is fixedly held on the intermediate barrel 37. In addition, an iris 39 (see FIG. 1) constituting the diaphragm device is inserted in a portion in front of the intermediate fixed lens.

  Next, the configuration of the zoom linear motor 41 for moving the zoom moving body 31 will be described. As shown in FIGS. 4 and 5, the zoom linear motor 41 includes a coil 42 having a rectangular tube shape. The coil 42 is fixed to the zoom moving body 31 and is slidably attached to an outer peripheral portion of a yoke bridge 43 that is disposed substantially parallel to the guide main shaft 26. A substantially U-shaped yoke 44 is attached from above so as to contact both ends of the yoke bridge 43. A magnet 45 is fixed to the lower surface of the yoke 44, and the magnetic flux of the magnet 45 passes through the yoke 44 and the yoke bridge 43 to form a magnetic circuit.

  A position detecting magnet 46 is mounted on the outer surface of the zoom moving body 31 including the coil 42, and the position detecting magnet 46 is attached by a magnetoresistive element 48 mounted on a mounting plate 47 (see FIG. 2). I try to detect it. The coil 42 is supplied with power by a flexible printed cable 49 attached to the rear surface side of the zoom moving body 31 and the surface on the imaging element 61 side described later. The yoke 44 is received in a slit 50 formed on the upper surface of the outer casing 20 as shown in FIGS.

  Next, the focus linear motor 51 for moving the focus moving body 33 that holds the focus lens 34 will be described with reference to FIGS. 3, 4, 5, and 6. The linear motor 51 includes a square cylindrical coil 52 attached to the focus moving body 33. The rectangular tube-shaped coil 52 is slidably guided by a yoke bridge 53 arranged in parallel to the guiding main shaft 27. A yoke 54 having a substantially U-shape is attached so as to contact the upper surface of the yoke bridge 53. As shown in FIGS. 1 and 2, the yoke 54 is held in the slit 60 on the upper surface of the outer casing 20. A bar-shaped magnet 55 is attached to the lower surface of the yoke 54.

  A position detection magnet 56 is attached to the side surface of the focus moving body 33 to which the coil 52 is attached, and this magnet 56 is detected by a magnetoresistive element 58 fixed inside a mounting plate 57 (see FIG. 1). Like to do. A flexible printed cable 59 is attached to the side surface of the focus moving body 33 on the objective lens side, and power is supplied to the coil 52 by the printed cable 59.

  An image sensor 61 is disposed in an imaging unit of an optical system having such a lens configuration. The image sensor 61 converts the optical image into an electrical image signal. A CCD imager is used as the image sensor 61. The video signal read from the image sensor 61 is converted into a digital signal by the A / D converter 62 shown in FIG. 7, and is supplied to the signal processor 63 to be processed into an appropriate video signal. The performed video signal is output from the imaging device. When the imaging apparatus is a video camera provided with a video signal recording unit, the obtained video signal is recorded by the recording unit.

  The signal processor 63 includes a detection circuit that detects a predetermined component of the imaging signal, for example, a high-frequency component of luminance, and supplies the detection output of the detection circuit to a controller 64 that controls the imaging operation of the imaging apparatus. . Based on the level of the detection signal, the controller 64 determines the focus state, that is, the in-focus state, and performs automatic focus control so that the determined in-focus state becomes the just-focus state.

  In this focus control, a servo control process for driving the focus control lens 34 is performed from the controller 64 to the servo circuit 66 to generate a drive signal for the motor 51, and this drive signal is supplied to the servo motor 51. This is done by adjusting the movable position 34.

  The controller 64 is supplied with operation information of the zoom operation key. Based on the operation information of the zoom operation key, the controller 64 supplies the target position information of the zoom lens 32 for setting the image frame to the servo circuit 66. Then, servo processing for driving the zoom lens 32 to the target position is performed to generate a drive signal for the motor 41, and the drive signal is supplied to the motor 41 to adjust the movable position of the zoom lens 32.

  In this case, the drive speed of the image frame setting zoom lens 32 by the servo motor 41 can be varied according to the operation state of the zoom operation key, and when driven at the highest speed, the wide end (that is, the focal length is the longest). The time required for the image frame setting zoom lens group 32 to move from the short state to the tele end (that is, the state with the longest focal length) is, for example, a very short high speed drive of less than 1 second.

  Even if the focus adjustment lens 34 has the same subject position to be focused, the just focus state cannot be maintained unless the position is changed in accordance with the focal length when the image frame (focal length) changes. Regarding the correspondence between the focal length and the position of the focus adjustment lens 34 in the just focus state, necessary information is set in advance in the memory 65 connected to the controller 64. When the focal length changes, the controller 64 reads the information stored in the memory 65, supplies a servo control signal for focus control to the servo circuit 66, and adjusts the movable position of the focus adjustment lens 34.

  In this case, the drive of the focus lens 34 by the servo motor 51 can also be driven at a very high speed. For example, when the zoom lens 32 for setting the image frame is moved at a high speed as described above, the movement follows the movement. The process of correcting the movable position of the focus lens 34 and maintaining the just focus state can be performed at high speed.

  In the imaging lens device that performs the zoom operation and the focus adjustment in this manner, the arrangement structure of the linear motors 41 and 52 for moving the zoom moving body 31 and the focus moving body 33 is improved in the lens barrel. Significant miniaturization has been achieved. The configuration will be described below. 1 and 2 show the external appearance of this lens device, and FIGS. 3 and 4 show the internal structure in which the outer casing 20 and the iris 39 are removed from the devices shown in FIGS.

  The imaging lens device has a structure in which an objective lens 23 attached to the front lens barrel 22 from the subject side, a zoom lens 32 attached to a zoom moving body 31 for adjusting a magnification such as zoom, and an intermediate lens barrel 37 on the rear side. Zoom lens for moving the zoom moving body 31 and the focus moving body 33, the intermediate fixed lens 38 of the three groups attached to the lens, the iris 39 constituting the diaphragm device, the focus lens 34 attached to the focus moving body 33, It is composed of a linear motor 41, a focusing linear motor 51, and the like.

  Here, in order to measure the amount of movement of the zoom moving body 31 that moves in the optical axis direction along the guiding main axis 26 and the guiding auxiliary axis 28, the zoom moving body 31 is alternately arranged at a predetermined pitch in one direction. A position detecting magnet 46 magnetized in the opposite direction is attached, and the position detecting magnet 46 is detected by a magnetoresistive element 48. Similarly, in order to measure the movement amount of the focus moving body 33 that moves in the optical axis direction along the guiding main shaft 27 and the guiding auxiliary shaft 28, the focus moving body 33 has a predetermined magnetization pitch in one direction. The position detecting magnets 56 which are alternately magnetized with opposite polarities are attached, and the position of the magnets 56 is detected by the magnetoresistive element 58.

  The magnetoresistive elements 48 and 58 for detecting the position of the zoom moving body 31 and the position of the focus moving body 33, the yoke 44 of the zoom linear motor 41, and the yoke 54 of the focus linear motor 51 are provided. 1 is arranged on the upper surface of the outer casing 20 shown in FIG. 1 to reduce the size of the lens barrel in the outer diameter direction. Further, these yokes 44 and 54 are received in the slits 50 and 60, so that the outer casing 20 By arranging them substantially parallel to each other on the upper surface, the size in the optical axis direction can be reduced. Therefore, the lens device as a whole can be greatly reduced in size.

  Next, particularly as shown in FIGS. 4 to 6, between the guiding main shaft 26 that guides the zoom moving body 31 in the optical axis direction and the guiding main shaft 27 that guides the focus moving body 33 in the optical axis direction, A zoom linear motor 41 for moving the zoom moving body 31 in the optical axis direction and a focus linear motor 51 for moving the focus moving body 33 in the optical axis direction are housed and arranged, in particular, a direction that is normal to the optical axis direction. The lens device in the outer diameter direction can be reduced in size.

  In addition, the zoom linear motor 41 for driving the zoom moving body 31 and the focus linear motor 51 for moving the focus moving body 33 are not arranged in a straight line in the optical axis direction, but in the optical axis direction. Therefore, the size in the optical axis direction can be reduced.

  Further, by sharing a guide auxiliary shaft 28 that suppresses the rotation of the zoom moving body 31 and the focus moving body 33 with respect to the guide main shafts 26 and 27, the guide auxiliary shaft 28 is made to be connected to the zoom moving body 31 and the focus moving body. 33, the number of parts can be reduced as compared with the case where each has an auxiliary axis individually, and this makes it possible to reduce the size in the outer diameter direction that is normal to the optical axis direction.

  In the lens apparatus in which the zoom moving body 31 and the focus moving body 33 are driven by the linear motors 41 and 51, the linear driving magnets 45 and 55 and the magnetoresistive elements 48 and 58 that detect the positions of the moving bodies 31 and 33 are used. If the distances are close to each other, a malfunction may occur in detection of the magnetoresistive elements 48 and 58 due to leakage magnetic flux. In order to solve such a problem, in the present embodiment, the coils 42 and 52 of the zoom linear motor 41 and the focus linear motor 51, the U-shaped yokes 44 and 54, and the yoke bridge 43, 53 is arranged as close to the center of the optical axis as possible, and the magnetic flux generated from the drive magnets 45 and 55 is avoided. Moreover, by disposing the guide main shafts 26 and 27 made of a magnetic material between the magnetoresistive elements 48 and 58 and the drive magnets 45 and 55, the leakage main magnetic flux is absorbed by these guide main shafts 26 and 27. The magnetic resistance elements 48 and 58 are prevented from malfunctioning by preventing leakage magnetic flux from being applied to the magnetic resistance elements 48 and 58.

  Further, when the position of the center of gravity of the zoom moving body 31 and the focus moving body 33 and the position of the thrust action point of the linear motors 41 and 51 are shifted in the optical axis direction, a moment around the center of gravity of the moving bodies 31 and 33 is generated. The frictional force between the guiding main shafts 26 and 27 and the sleeve portions of the moving bodies 31 and 33 fitted to the yoke bridges 43 and 53 of the zoom moving bodies 31 and 33 varies. Such a variation in the frictional force makes it difficult to control the position of the zoom moving body 31 and the focus moving body 33 smoothly. Therefore, in the present embodiment, the plane that is normal to the optical axis direction is in a direction normal to the optical axis relative to the guiding main axes 26 and 27 of the zoom moving body 31 and the focus moving body 33, and the optical axis. Driving coils 42 and 52 are arranged on the center side. According to such a configuration, the position of the center of gravity of the zoom moving bodies 31 and 33 and the position of the thrust action point of the linear motors 41 and 51 become very close to each other, and thereby the zoom moving body 31 and the focus moving body 33. Is moved smoothly and stable position control is possible.

  The effects of this embodiment are enumerated as follows.

  (1) The coils 42 and 52, the magnets 45 and 55, and the yokes 44 and 54, which are constituent elements of the zoom linear motor 41 and the focus linear motor 51, are connected to the upper surface of the outer casing 20, or the zoom moving body 31 or the focus moving body. By arranging on one side in the same direction as the normal direction with respect to 33 moving directions, the entire lens barrel can be reduced in size in the outer diameter direction. In addition, coils 42 and 52, magnets 45 and 55, and yokes 44 and 54, which are components of the linear motors 41 and 51, are arranged between the guide main shafts 26 and 27 for guiding the movement of the zoom moving body 31 and the focus moving body 33, respectively. By the arrangement structure arranged in parallel, the entire lens barrel can be downsized in the optical axis direction.

  (2) In addition to the above-described configuration, the rotation directions of the zoom moving body 31 and the focus moving body 33 around the guiding main shafts 26 and 27 that restrict the respective coordinate directions on the plane that is normal to the optical axis. By sharing the guiding auxiliary shaft 28 for restricting the zoom moving body 31 and the focus moving body 33, the number of parts can be reduced and the volume of the entire lens apparatus can be reduced.

  (3) As described above, the lens device can be miniaturized and at the center of the zoom moving body 31 and the focus moving body 33 with respect to the guiding main shafts 26 and 27 on the plane that is normal to the optical axis of the image sensor 61. The coils 42 and 52 are arranged on the side, the center of gravity of the zoom moving body 31 and the focus moving body 33 is optimized, and the zoom moving body 31 and focus movement are performed so as to avoid magnetic flux generated from the linear drive magnets 45 and 55. By arranging the magnetoresistive elements 48 and 58 used for detecting the position of the body 33, high-accuracy position control becomes possible, and a small lens barrel is achieved, thereby achieving high performance of the lens apparatus. .

  Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the technical idea of the invention included in the present application. For example, various modifications can be made within the scope of the technical idea of the invention included in the present application with respect to the specific shape and specific configuration of each member in the above embodiment.

  The present invention can be widely used as an imaging lens device for video cameras, digital cameras, portable information terminal cameras, and other various imaging devices.

It is an external appearance perspective view of an imaging lens device. It is an external appearance perspective view in the state where the right side of the imaging lens device is on the upper side. It is a side view of the state which removed the outer casing of the lens apparatus. It is a perspective view of the principal part of a lens apparatus. It is the front view which looked at the principal part shown in FIG. 4 from the objective lens side. It is the rear view which looked at the lens apparatus shown in FIG. 4 from the image pick-up element side. It is a block diagram which shows the system configuration | structure of a lens apparatus. It is a principal part longitudinal cross-sectional view of the conventional lens apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Front side lens barrel, 2 ... Objective lens, 3 ... Zoom moving body, 4 ... Zoom lens, 5 ... Intermediate lens barrel, 6 ... Intermediate fixed lens, 7 ... Focus moving body, 8 ... Focus lens, 9 ... Rear mirror Cylinder, 10 ... Imaging device (CCD), 11 ... Iris, 12, 13 ... Guide shaft (upper), 14 ... Guide shaft (lower), 20 ... Outer casing, 21 ... Front plate, 22 ... Front lens barrel, 23 ... Objective lens, 24 ... back plate, 26, 27 ... guiding spindle, 28 ... guiding auxiliary shaft, 31 ... zoom moving body, 32 ... zoom lens, 33 ... focus moving body, 34 ... focus lens, 36 ... partition wall, 37 ... Intermediate lens barrel, 38 ... Intermediate fixed lens, 39 ... Iris (aperture device), 41 ... Linear motor for zoom, 42 ... Coil, 43 ... Yoke bridge, 44 ... Yoke, 45 ... Magnet, 46 ... Magnetic for position detection, 47 ... Installation 48 ... Magnetoresistive element 49 ... Flexible printed cable 50 ... Slit 51 ... Linear motor for focus 52 ... Coil 53 ... Yoke bridge 54 ... Yoke 55 ... Magnet 56 ... Position detection magnet 57 ... Mounting plate, 58 ... magnetoresistive element, 59 ... flexible printed cable, 60 ... slit, 61 ... imaging device (CCD), 62 ... A / D converter, 63 ... signal processor, 64 ... controller, 65 ... memory, 66 ... Servo circuit

Claims (14)

The zoom lens can be moved in the optical axis direction by a zoom moving body, and further moved in the optical axis direction by a zoom linear motor,
An imaging lens device in which a focus lens is movable in the optical axis direction by a focus moving body and is moved in the optical axis direction by a focusing linear motor,
The zoom linear motor and the focus linear on the outer surface of a substantially rectangular tube-shaped lens barrel constituting the lens apparatus and substantially parallel to the optical axis, or on one side in the normal direction to the optical axis An imaging lens device comprising a motor.   The zoom moving body is guided by the zoom guide spindle so as to be movable in the optical axis direction, the focus moving body is guided by the focus guide spindle so as to be movable in the optical axis direction, and the zoom guide spindle and the focus guide spindle The imaging zoom device according to claim 1, wherein the zoom linear motor and the focus linear motor are arranged side by side.   The zoom guiding main axis and the focus guiding main axis are arranged on a plane substantially parallel to the optical axis on one side in the normal direction with respect to the optical axis, and are shifted from the plane substantially parallel to the optical axis. The imaging lens device according to claim 2, wherein a common guiding auxiliary shaft is arranged at the same position, and guides the zoom moving body and the focus moving body in common.   3. The imaging lens device according to claim 2, wherein a coil of the zoom linear motor is arranged closer to the optical axis than the zoom guiding main axis in a direction normal to the optical axis.   3. The imaging lens device according to claim 2, wherein a coil of the focus linear motor is disposed on the optical axis side of the focus guide main shaft in a normal direction with respect to the optical axis.   The coil of the zoom linear motor is fed by a flexible printed cable attached to the image pickup means side in the optical axis direction of the zoom moving body, and the coil of the focus linear motor and the image pickup means in the optical axis direction of the focus moving body The imaging lens device according to claim 2, wherein power is supplied by a flexible printed cable attached to the opposite side.   The yoke of the zoom linear motor and the yoke of the focus linear motor are received in slits extending in the optical axis direction on the outer surface of the lens barrel and formed in parallel to each other. The lens apparatus for imaging described.   The zoom guide has a magnetoresistive element for detecting the position of the zoom moving body and a magnetoresistive element for detecting the position of the focus moving body. 3. The imaging lens device according to claim 2, wherein a main shaft and the focus guide main shaft are arranged, and the zoom guide main shaft and the focus guide main shaft are made of a magnetic material.   9. The imaging lens apparatus according to claim 8, wherein a magnetoresistive element that detects a position of the zoom moving body is disposed on a side opposite to the zoom guiding main shaft from the zoom linear motor.   9. The imaging lens device according to claim 8, wherein a magnetoresistive element that detects the position of the focus moving body is disposed on the opposite side of the focus guide main shaft from the focus linear motor.   A zoom linear motor having a magnetoresistive element for detecting the position of the zoom moving body and a magnetoresistive element for detecting the position of the focus moving body, and between the pair of magnetoresistive elements in a direction perpendicular to the optical axis The imaging lens device according to claim 2, further comprising: a focusing linear motor.   The zoom linear motor and the focus linear motor are juxtaposed substantially parallel to each other on a plane that is substantially parallel to the optical axis and set on one side in the normal direction to the main axis. Item 12. The imaging lens device according to Item 11.   The zoom guide main axis and the focus guide main axis are juxtaposed substantially parallel to each other on a plane that is substantially parallel to the optical axis and set on one side in the normal direction to the optical axis. The imaging lens device according to 11. An imaging device using the imaging lens device according to claim 1.