JP2011107417A - Lens barrel and imaging device - Google Patents

Abstract

A lens barrel mounting angle adjustment operation in an imaging apparatus is simplified.
A lens holding frame that holds a lens, a frame support that supports the lens holding frame, and one of the lens holding frame and the frame support, the thickness of the lens in the optical axis direction being the circumference of the lens A tapered portion that changes along the direction, and a sliding piece that is sandwiched between the other of the lens holding frame and the frame supporting portion and the tapered portion, and slides along the tapered portion. It is supported from the frame support part via the part and the sliding piece.
[Selection] Figure 4

Description

  The present invention relates to a lens barrel and an imaging apparatus.

  The process of attaching the optical component to the optical device includes an operation of adjusting the tilt of the optical axis of the optical component. For this reason, the attachment structure of the optical component may include an adjustment mechanism that can change the inclination of the optical axis of the optical component. Patent Document 1 describes a structure in which a frame that supports an optical member biased by a spring while resisting the biasing is displaced by a screw or the like.

JP 2003-279823 A

  For example, in manufacturing a lens barrel used in an interchangeable lens imaging apparatus, it is required to adjust the optical axis of the entire optical system including a plurality of optical components in addition to the optical axis alignment of individual optical components. For this reason, there is a need for an adjustment mechanism that can be easily adjusted and has high support rigidity for the optical system fixed after adjustment.

  Therefore, as a first aspect of the present invention, a lens holding frame (141, 142, 143, 144, 145, 146) for holding a lens (L1, L2, L3, L4, L5, L6) and a lens holding frame are supported. And a taper portion (182) disposed on one of the lens holding frame and the frame support portion and having a thickness in the optical axis (X) direction of the lens that changes along the circumferential direction of the lens. A sliding piece (170) sandwiched between the other of the lens holding frame and the frame supporting portion and the tapered portion and sliding along the tapered portion, and the lens holding frame includes the tapered portion and the sliding piece. A lens barrel (100) supported from the frame support is provided.

  As a second aspect of the present invention, there is provided an imaging device (300) including the lens barrel and an imaging unit (200) that captures an image connected by the lens barrel.

2 is a perspective view of an interchangeable lens 100. FIG. 2 is a perspective view of a camera body 200. FIG. 2 is a cross-sectional view of a camera system 300. FIG. 4 is an exploded perspective view of an adjustment mechanism 400. FIG. FIG. 10 is an exploded perspective view in which the viewpoint of the adjustment mechanism 400 is changed. 3 is a perspective view of a slide shim 170. FIG. It is sectional drawing of the fixed slide shim 170. FIG. 3 is an exploded perspective view of an adjustment mechanism 401. FIG. FIG. 6 is an exploded perspective view in which the viewpoint of the adjustment mechanism 401 is changed.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is a perspective view of the interchangeable lens 100. In the illustrated state, the rear end of the interchangeable lens 100 is visible. When the interchangeable lens 100 is attached to the camera body, the rear end of the illustrated interchangeable lens 100 is engaged with the camera body. Note that the optical axis X of the optical system of the interchangeable lens 100 is indicated by a dotted line in the drawing.

  The interchangeable lens 100 includes a fixed cylinder 110, a focus ring 120, and a zoom ring 130. The fixed cylinder 110 is fixed to the camera body or the like, and supports movable parts such as the focus ring 120 and the zoom ring 130.

  The focus ring 120 can be rotated along the peripheral surface of the fixed cylinder 110. When the focus ring 120 is rotated, the focal position of the interchangeable lens 100 changes.

  The zoom ring 130 can be rotated along the peripheral surface of the fixed cylinder 110. When the zoom ring 130 is rotated, the magnification (focal length) of the interchangeable lens 100 changes.

  A mount ring 160 and a mount claw 162 are disposed on the rear end surface of the interchangeable lens 100. The mount ring 160 and the mount pawl 162 may be an integral part. The mount ring 160 has a locking hole 164.

  The mount ring 160 has a flat annular surface that is orthogonal to the optical axis X of the optical system of the interchangeable lens 100. When the interchangeable lens 100 is attached to the camera body, the mount ring 160 is in close contact with the mount ring on the camera body side. Thereby, the optical axis X of the optical system of the interchangeable lens 100 is positioned with respect to the camera body. In other words, when manufacturing the interchangeable lens 100, it is required to adjust so that the optical axis X of the optical system and the mount ring 160 are accurately orthogonal.

  The mount claw 162 has an arc shape and protrudes outward in the radial direction of the interchangeable lens 100. When the interchangeable lens 100 is attached to the camera body, the mount claw 162 engages with the mount claw on the camera body side to prevent the interchangeable lens 100 from falling off.

  An insertion index 168 is disposed near the rear end of the peripheral surface of the interchangeable lens 100. The insertion index 168 is a mark for alignment when the interchangeable lens 100 is mounted on the camera body.

  FIG. 2 is a perspective view of the camera body 200. The camera body 200 includes a housing 201 and a mount ring 260 disposed on the front surface thereof.

  The mount ring 260 has an annular flat surface having an opening at the center, and an arc-shaped mount claw 262 disposed on the inside thereof. The mount claw 262 protrudes radially inward of the mount ring 260 and engages with the mount claw 162 on the interchangeable lens 100 side when the interchangeable lens 100 is attached to the camera body 200.

  The mount ring 260 is provided with a locking pin 264. The locking pin 264 protrudes from the flat surface of the mount ring 260 and engages with the locking hole 164 when the interchangeable lens 100 is attached to lock the rotation of the interchangeable lens 100 around the optical axis X.

  When the release button 266 is pressed, the locking pin 264 sinks toward the inside of the housing 201 and comes out of the locking hole 164. Thereby, the latching with respect to the interchangeable lens 100 is cancelled | released.

  Further, an insertion index 268 is arranged on the surface of the housing 201 in the vicinity of the mount ring 260. The insertion index 268 is a reference for positioning with the insertion index 168 on the interchangeable lens 100 side when the interchangeable lens 100 is attached to the camera body 200.

  The interchangeable lens 100 is attached to the camera body 200 according to the following procedure. First, with the interchangeable lens 100 and the mount rings 160 and 260 of the camera body 200 facing each other, the insertion index 168 of the interchangeable lens 100 is matched with the insertion index 268 of the camera body 200.

  As a result, the mount claw 162 on the interchangeable lens 100 side and the mount claw 262 on the camera body 200 side have a complementary positional relationship. Therefore, when the rear end of the interchangeable lens 100 is inserted into the opening of the mount ring 260, the mount claw 162 on the interchangeable lens 100 side passes between the mount claws 262 on the camera body 200 side and Enter to the back side.

  Subsequently, when the interchangeable lens 100 is rotated clockwise around the optical axis X, the mount claw 162 on the interchangeable lens 100 side enters the back side of the mount claw 262 on the camera body 200 side, and both are engaged. Thereby, the interchangeable lens 100 and the camera body 200 are engaged with each other.

  Note that at least one of the mount claws 162 and 262 has a leaf spring biased in the thickness direction of the mount claws 162 and 262. Thereby, the mount rings 160 and 260 are in close contact with each other, and the interchangeable lens 100 is positioned with respect to the camera body 200.

  When the interchangeable lens 100 inserted into the camera body 200 is rotated and the interchangeable lens 100 rotates to a position where the mount claws 162 and 262 are completely engaged, the locking pin 264 enters the locking hole 164. As a result, the rotation of the interchangeable lens 100 is locked. Therefore, unless the release button 266 is pushed, the interchangeable lens 100 will not drop off.

  The equipment to be mounted on the mount ring 260 of the camera body 200 is not limited to the interchangeable lens 100. For example, an intermediate ring, a conversion adapter, etc. may be attached. It is preferable that the optical axis of these devices is aligned with the camera body 200.

  FIG. 3 is a cross-sectional view of the camera system 300. The camera system 300 includes a camera body 200 and an interchangeable lens 100 attached to the camera body 200. In this figure, elements common to those in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description is omitted.

  The interchangeable lens 100 includes a plurality of lenses L1, L2, L3, L4, L5, and L6, and lens frames 141, 142, 143, 144, 145, and 146 that individually support the lenses L1 to L6. One lens frame 143 holds the diaphragm device 222 together with the lens L3. Each of the lens frames 141 to 146 is supported by a fixed inner cylinder 112 formed inside the fixed cylinder 110 so as to be movable in the optical axis X direction.

  In addition, the lenses L1 to L6 are arranged on a common optical axis X and form one optical system as a whole. When the focus ring 120 or the zoom ring is rotated in the interchangeable lens 100, one of the lens frames 141 to 146 moves in the optical axis direction X with respect to the fixed cylinder 110, and the focal position and focal length of the entire optical system. To change.

  Further, in the interchangeable lens 100, the mount ring 160 is fixed to the rear end of the fixed inner cylinder 112 by a mount fixing screw 198. As already described, the mount ring 160 is in close contact with the mount ring 260 of the camera body 200.

  The camera body 200 houses an optical system including a main mirror 240, a pentaprism 270, and a finder optical system 290, and a main control unit 250. The primary mirror 240 has a standby position that is inclined on the optical path of incident light that has entered through the optical system of the interchangeable lens 100, and a shooting position that rises while avoiding the incident light (indicated by a dotted line in the figure). Move between.

  The primary mirror 240 in the standby position guides most of the incident light to the focusing screen 272 disposed above. The focusing screen 272 is disposed at a position where an image is formed when the optical system of the interchangeable lens 100 is focused, and visualizes the image.

  The image formed on the focusing screen 272 is observed from the finder optical system 290 via the pentaprism 270. Thereby, the image on the focusing screen 272 can be viewed as a normal image from the finder optical system 290.

  A half mirror 292 is disposed between the pentaprism 270 and the finder optical system 290. The half mirror 292 superimposes the display image formed on the finder LCD 294 on the image on the focusing screen 272. As a result, the image on the focusing screen 272 and the image on the viewfinder LCD 294 can be seen together at the exit end of the viewfinder optical system 290. The viewfinder LCD 294 displays information such as shooting conditions and setting conditions of the camera system 300.

  A part of the light emitted from the pentaprism 270 is guided to the photometry unit 280. The photometry unit 280 measures the intensity of incident light, its distribution, and the like, and refers to the measurement result when determining imaging conditions.

  On the other hand, a secondary mirror 242 is disposed on the back surface of the primary mirror 240 with respect to the incident light incident surface. The secondary mirror 242 guides part of the incident light transmitted through the primary mirror 240 to the focus detection unit 230 disposed below. Thereby, when the main mirror 240 is in the standby position, the focus detection unit 230 detects the focus adjustment state of the optical system. When the primary mirror 240 is moved to the photographing position, the secondary mirror 242 is also retracted from the optical path of the incident light.

  A shutter 220, an optical filter 212, and an image sensor 210 are disposed along the optical axis behind the primary mirror 240 with respect to the incident light from the interchangeable lens 100. When the shutter 220 is opened, the primary mirror 240 moves to the photographing position immediately before that, so that the incident light travels straight and enters the image sensor 210. As a result, the image formed by the incident light is converted into an electrical signal in the image sensor 210.

  In addition, the camera body 200 includes a main LCD 296 facing the outside on the back surface of the interchangeable lens 100. The main LCD 296 can display various setting information for the camera body 200 and can also display an image formed on the image sensor 210 when the primary mirror 240 is moved to the shooting position.

  The main control unit 250 comprehensively controls the various operations as described above. The camera body 200 is electrically connected to the interchangeable lens 100 via a contact not shown.

  Accordingly, the main control unit 250 forms an autofocus mechanism that drives the interchangeable lens 100 with reference to the information on the distance to the subject detected by the focus detection unit 230. The main control unit 250 also controls the opening time of the shutter 220 and the opening degree of the aperture device 222 with reference to the measurement result of the photometry unit 280.

  FIG. 4 is an exploded perspective view of the adjustment mechanism 400. The adjustment mechanism 400 is provided in the interchangeable lens 100 and adjusts the tilt (tilt) of the optical axis X with respect to the mount ring 160 in the interchangeable lens 100. Although the optical system is not shown in FIG. 4, the optical axis X is shown in the figure for convenience of explanation.

  The adjusting mechanism 400 includes a pair of slide shims 170 and a single taper ring 180. The taper ring 180 is attached to the rear end of the fixed inner cylinder 112. The slide shim 170 is sandwiched between a flange portion 114 formed at the rear end of the fixed inner cylinder 112 and the taper ring 180.

  The fixed inner cylinder 112 has a flange portion 114 extending outward in the radial direction on the rear end side. The flange portion 114 includes a positioning portion 116, a mound portion 118, and the like that extend further rearward from the rear surface of the flange portion 114. The mound portion 118 has a screw hole 119 that penetrates to the front surface of the flange portion 114. The positioning part 116, the mound part 118, and the screw hole 119 will be described later with reference to FIG.

  The taper ring 180 has substantially the same outer diameter as the outer diameter of the flange portion 114. Further, the taper ring 180 has an inner diameter that is substantially the same as the inner diameter of the fixed inner cylinder 112.

  Further, the taper ring 180 has a notch portion 188 having a shape and arrangement complementary to the positioning portion 116. Thereby, when the taper ring 180 is attached to the rear end of the fixed inner cylinder 112, the positioning part 116 and the notch part 188 are fitted, and the taper ring 180 is positioned.

  A pair of taper portions 182, a long hole 184, a guide groove 186, and a contact portion 181 are disposed on the surface of the taper ring 180 facing the fixed inner cylinder 112. The tapered portion 182 is formed in an arc-shaped region that follows the shape of the tapered ring 180 and is thick at one end and thin at the other end.

  A thick portion of the taper portion 182 protrudes from the taper ring 180 toward the fixed inner cylinder 112. The thin portion of the tapered portion 182 has the same thickness as the portion other than the tapered portion 182 of the taper ring 180. A slope having a certain slope is formed between both ends of the taper portion 182.

  In the illustrated example, the planar shape of the left and right taper portions 182 is symmetrical in the taper ring 180. On the other hand, with respect to the thickness of the tapered portion 182, the left tapered portion 182 in the drawing has a thick upper end and a thin lower end. The taper portion 182 on the right side in the figure has a thick lower end and a thin upper end. However, a tapered portion 182 that is inclined in the same direction may be formed in the circumferential direction of the taper ring 180.

  The long hole 184 extends in the longitudinal direction of the tapered portion 182 at the center in the width direction of the tapered portion 182. Shim fixing screws 194 are inserted through the long holes 184, respectively. Each of the shim fixing screws 194 has a tip protruding toward the fixed inner cylinder 112 side.

  A pair of guide grooves 186 are arranged along each of the tapered portions 182. Each of the guide grooves 186 has a certain width and depth and is formed to be recessed from the taper ring 180.

  The pair of abutting portions 181 are arranged in the vicinity of the lower end of the taper ring 180 in the figure and project toward the fixed inner cylinder 112. The pair of abutting portions 181 are arranged symmetrically across one of the ring fixing screws 192.

  The taper ring 180 is penetrated by a plurality of ring fixing screws 192 in a region other than the taper portion 182. The ring fixing screw 192 has a tip protruding toward the fixed inner cylinder 112 side.

  The slide shim 170 has a tapered surface 172 and a guided portion 176. The tapered surface 172 has a shape complementary to the tapered portion 182. The guided portion 176 rises from the tapered surface 172 on both sides of the tapered surface 172 in the width direction of the slide shim 170.

  The slide shim 170 has a contact protrusion 178 on the back surface and a lever hole 174 on the outside of the side surface. One end of a detachable lever 177 is inserted into the lever hole 174. The detailed structure of the slide shim 170 will be described later with reference to FIG.

  FIG. 5 is an exploded perspective view in which the viewpoint of the adjustment mechanism 400 is changed. The same members as those in FIG. 4 are denoted by the same reference numerals, and redundant description is omitted.

  On the back surface of the taper ring 180, the head of the ring fixing screw 192 and the head of the shim fixing screw 194 are visible. In each of the slide shims 170, one end of the screw hole 171 opens at the center of the tapered surface 172.

  In the flange portion 114 of the fixed inner cylinder 112, a plurality of positioning portions 116 and mound portions 118 are arranged symmetrically in the drawing. The positioning portion 116 protrudes greatly from the rear end surface of the fixed inner cylinder 112. Screw holes 117 are respectively arranged on the end surfaces of the positioning portions 116. Each of the mound portions 118 is lower than the positioning portion 116 and slightly protrudes from the rear end surface of the fixed inner cylinder 112. Screw holes 119 are respectively arranged on the end surface of the mound portion 118.

  The positioning portion 116 is disposed at a position complementary to the notch 188 of the taper ring 180. Therefore, when the taper ring 180 is fixed to the rear end surface of the fixed inner cylinder 112, the positioning part 116 enters the notch 188 and determines the position of the taper ring 180 relative to the fixed inner cylinder 112.

  When the taper ring 180 is fixed to the rear end surface of the fixed inner cylinder 112, each of the mound parts 118 faces the taper ring 180 in the vicinity of the positioning part 116 and the notch part 188. Therefore, the fixed inner cylinder 112 and the taper ring 180 are integrated while maintaining the positioning accuracy by screwing the ring fixing screw 192 penetrating the taper ring 180 into the screw hole 119.

  Here, a pair of screw holes 119 in the mound portion 118 are arranged in the circumferential direction of the taper ring 180 with the taper portion 182 interposed therebetween. As a result, as will be described later, when the taper ring 180 is fixed to the flange part 114 with the slide shim 170 on the taper part 182 interposed therebetween, the positioning of the taper ring 180 is stabilized.

  Each of the slide shims 170 is sandwiched between the tapered portion 182 of the tapered ring 180 and the flange portion 114 of the fixed inner cylinder 112. At this time, the slide shim 170 can be fixed to the taper ring 180 by screwing the shim fixing screw 194 inserted into the long hole 184 into the screw hole 171. Note that the tip of the mount fixing screw 198 for fixing the mount ring 160 is screwed into the screw hole 117 at the tip of the positioning portion 116.

  FIG. 6 is a perspective view showing the slide shim 170 alone. As already described, the slide shim 170 has the tapered surface 172 and the guided portion 176.

  The tapered surface 172 has a shape that is complementary to the tapered portion 182 and has an inclination that changes the thickness of the slide shim 170 along the longitudinal direction. The inclination of the taper surface 172 is equal to the inclination of the taper portion 182 of the taper ring 180. As a result, when the slide shim 170 is placed on the taper portion 182, the back surface 179 of the slide shim 170 is parallel to a portion other than the taper portion 182 of the taper ring 180.

  FIG. 7 is a cross-sectional view of the slide shim 170 fixed between the flange portion 114 and the taper ring 180. Elements common to FIGS. 4, 5 and 6 are given the same reference numerals, and redundant description is omitted.

  When placed on the taper portion 182 of the taper ring 180, the taper surface 172 of the slide shim 170 is in close contact with the surface of the taper portion 182. The pair of guided portions 176 of the slide shim 170 rises so as to protrude from the tapered surface 172 on both sides of the tapered surface 172, and goes around the side of the tapered portion 182. This prevents the slide shim 170 from shifting laterally from the tapered portion 182. The guided portion 176 is narrower than the guide groove 186 of the taper ring 180.

  Further, when the slide shim 170 is placed on a thin portion of the tapered portion 182, the guided portion 176 enters the guide groove 186. Thereby, the taper surface 172 of the slide shim 170 is prevented from floating from the taper portion 182.

  When the slide shim 170 is sandwiched between the taper ring 180 and the flange portion 114, the back surface of the slide shim 170 comes into contact with the flange portion 114 by the contact protrusion 178. Therefore, as will be described later, even when the relative angle between the taper ring 180 and the fixed inner cylinder 112 changes, no play occurs between the slide shim 170 and the flange portion 114.

  Further, the slide shim 170 can be fixed to the tapered portion 182 at an arbitrary position of the tapered portion 182 by screwing a shim fixing screw 194 inserted into the elongated hole 184 into the screw hole 171. Accordingly, by moving each of the slide shims 170 along the tapered portion 182, the distance between the flange portion 114 and the tapered ring 180 can be individually changed.

  Even when the slide shim 170 is sandwiched between the flange portion 114 and the taper ring 180, the slide shim 170 can be moved by inserting the lever 177 into the lever hole 174. Therefore, the inclination of the optical axis X can be adjusted even in the interchangeable lens 100 that has already been assembled.

  Referring to FIG. 4 again, a pair of abutting portions 181 are disposed near the lower end of the taper ring 180. When the taper ring 180 is attached to the flange portion 114, the contact portion 181 contacts the flange portion 114 and determines the interval between the flange portion 114 and the taper ring 180. Since the height of the contact portion 181 with respect to the taper ring 180 is constant, the distance between the flange portion 114 and the taper ring 180 is constant in the vicinity of the lower end of the taper ring 180 where the contact portion 181 is disposed.

  On the other hand, in the region where the taper portion 182 is disposed, the taper ring 180 does not directly contact the flange portion 114 but the slide shim 170 on the taper portion 182 and the flange portion 114 abut. Therefore, the positional relationship between the flange portion 114 and the taper ring 180 is determined by three points, that is, one contact portion 181 and a pair of slide shims 170.

  Here, in the region where the flange portion 114 abuts against the slide shim 170, the distance between the flange portion 114 and the taper ring 180 varies depending on the thickness of the taper portion 182 at the position of the slide shim 170. In other words, by moving the pair of slide shims 170 individually, it is possible to change the interval between the flange portion 114 and the taper ring 180 at the position where the slide shims 170 abut.

  In the adjustment mechanism 400, the pair of slide shims 170 can be individually moved. Therefore, the angle of the flange portion 114 with respect to the taper ring 180 can be changed by changing the interval at two locations on the circumference of the flange portion 114 and the taper ring 180. Therefore, for example, by providing a structure in which the mount ring 160 can be mounted at a fixed angle with respect to the taper ring 180, the optical axis X of the entire optical system by the lenses L1 to L6 can be adjusted with respect to the mount ring 160. Alternatively, the taper ring 180 and the mount ring 160 may be an integral member.

  In the above example, the tapered portion 182 is provided on the tapered ring 180 which is a member on the mount ring 160 side. However, the same adjustment function can be realized even if a taper is provided on the fixed inner cylinder 112 side. Further, the inclination of the tapered portion 182 is not necessarily constant, and further, the thickness of the tapered portion 182 may change stepwise.

  Further, in the above example, the taper portion 182 raised from the surface of the taper ring 180 is formed. However, the taper portion 182 can also be formed by forming an inclined surface recessed from the surface of the taper ring 180. In this case, instead of the guide groove 186, a guide rib protruding along the tapered portion 182 may be provided.

  Furthermore, in the above example, the positioning portion 116, the screw hole 119, etc. are arranged symmetrically in the drawing. However, by making the arrangement and shape of each part asymmetric, it is possible to prevent the attachment position and the attachment direction of each member from being wrong.

  FIG. 8 is an exploded perspective view of an adjustment mechanism 401 having another structure. FIG. 9 is an exploded perspective view of the adjustment mechanism 401 with a different viewpoint.

  The adjustment mechanism 401 has the same structure as that of the adjustment mechanism 400 shown in FIGS. 4 to 7 except for the part described below. Accordingly, common elements are denoted by the same reference numerals and redundant description is omitted.

  The adjustment mechanism 401 includes a washer 196 sandwiched between a taper ring 180 to which a slide shim 170 is fixed and a flange portion 114. The washer 196 has the same inner diameter as that of the fixed inner cylinder 112 and the taper ring 180. Further, the washer 196 has the same outer diameter as the outer diameter of the fixed inner cylinder 112 and the taper ring 180.

  Further, the washer 196 has a notch portion 197 that avoids interference with the positioning portion 116 and the mound portion 118 disposed on the end face of the flange portion 114. Accordingly, the washer 196 can be sandwiched between the slide shim 170 and the taper ring 180 and the flange portion 114 without affecting the inclination of the optical axis X adjusted by the slide shim 170 and the taper ring 180. Therefore, by preparing and exchanging a plurality of washers 196 having different thicknesses, the interval in the optical axis X direction of the fixed inner cylinder 112 with respect to the taper ring 180 can be changed.

  The slide shim 170 after the optical axis X is adjusted is fixed to the taper ring 180 by a shim fixing screw 194. Therefore, when the washer 196 is replaced, the adjusted inclination of the optical axis X does not change.

  Further, as shown in FIG. 9, a sliding protrusion 175 may be arranged on the tapered surface 172 of the slide shim 170. Thereby, the sticking of the slide shim 170 to the taper portion 182 can be prevented, and the play of the taper portion 182 and the slide shim 170 can be prevented.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  100 Interchangeable lens, 110 Fixed cylinder, 112 Fixed inner cylinder, 114 Flange part, 116 Positioning part, 117, 119, 171 Screw hole, 118 Mound part, 120 Focus ring, 130 Zoom ring, 141, 142, 143, 144, 145 146 Lens frame, 160, 260 Mount ring, 162, 262 Mount claw, 164 Locking hole, 168, 268 Insertion index, 170 Slide shim, 172 Tapered surface, 174 Lever hole, 175 Sliding projection, 176 Guided part 177 Lever, 178 Contact protrusion, 179 Back surface, 180 Tapered ring, 181 Contact portion, 182 Tapered portion, 184 Long hole, 186 Guide groove, 188, 197 Notch, 192 Ring fixing screw, 194 Shim fixing screw, 196 Washer, 198 Mount Fixing screw, 200 Camera body, 201 Case, 210 Image sensor, 212 Optical filter, 220 Shutter, 222 Aperture device, 230 Focus detection unit, 240 Primary mirror, 242 Secondary mirror, 250 Main control unit, 264 Locking pin, 266 Release button, 270 Penta prism, 272 Focusing screen, 280 Metering unit, 290 Viewfinder optical system, 292 Half mirror, 294 Viewfinder LCD, 296 Main LCD, 300 Camera system, 400, 401 Adjustment mechanism

Claims (12)

A lens holding frame for holding the lens;
A frame support for supporting the lens holding frame;
A tapered portion that is disposed on one of the lens holding frame and the frame support portion, and the thickness of the lens in the optical axis direction changes along the circumferential direction of the lens;
A sliding piece that is sandwiched between the other of the lens holding frame and the frame supporting portion and the tapered portion and slides along the tapered portion. The lens holding frame includes the tapered portion and the sliding portion. A lens barrel supported from the frame support through a moving frame. The lens barrel according to claim 1,
The lens barrel, wherein the thickness of the tapered portion changes continuously. The lens barrel according to claim 1 or 2, wherein
The one of the lens holding frame and the frame support part has a pair of arcuate tapered portions arranged along the circumferential direction of the lens,
The lens holding frame is positioned with respect to the frame support portion at a pair of the sliding pieces arranged in each of the pair of taper portions and another point different from the pair of taper portions. A lens barrel characterized by The lens barrel according to claim 3,
The pair of taper portions has a lens barrel in which the thickness increases in the same direction along a circumferential direction of a lens held by a lens holding frame. A lens barrel according to any one of claims 1 to 4, wherein
The lens barrel, wherein the lens holding frame and the frame support portion are coupled to each other by coupling members disposed in the vicinity of both ends of the tapered portion in the circumferential direction of the lens. A lens barrel according to any one of claims 1 to 5,
The lens barrel, wherein the tapered portion is disposed on the lens holding frame. A lens barrel according to any one of claims 1 to 6,
The lens barrel further comprising a spacer sandwiched between the other of the lens holding frame and the frame support portion and the sliding piece. A lens barrel according to any one of claims 1 to 7,
An elongated hole penetrating the tapered portion while being arranged along the extending direction of the tapered portion;
A lens barrel, comprising: a coupling screw that is inserted through the elongated hole and couples the one of the lens holding frame or the frame support portion and the sliding piece. A lens barrel according to any one of claims 1 to 8,
The lens holding frame and the frame support portion include a positioning portion that has a shape complementary to each other and is fitted,
The lens barrel characterized in that the positioning portion has an asymmetric shape or arrangement with respect to rotation around the optical axis. A lens barrel according to any one of claims 1 to 9,
2. The lens barrel according to claim 1, wherein the sliding piece includes a guide portion that extends along a side surface of the tapered portion and guides the sliding piece along the tapered portion. A lens barrel according to any one of claims 1 to 10,
The sliding piece has a hole for inserting a handle pin serving as a clue when displacing the sliding piece on a side surface exposed when sandwiched between the lens holding frame and the frame support portion. Lens barrel to be used. A lens barrel according to any one of claims 1 to 11,
An imaging device comprising: an imaging unit that captures an image connected by the lens barrel.

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