JP2005189443A - Lens barrel and camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a lens barrel and a camera in which a cam follower of a lens holder is surely prevented from being dislocated from a cam groove of the cam body though having a simple constitution even when external force is added in a state where the lens holder is extended. <P>SOLUTION: In the lens barrel 1, in a state where a 1st lens holder 10 is extended in an optical axis F direction, a 2nd lens holder 14 is in a state of being arranged so as to be superposed on a first cam follower 12 in a radial direction with an optical axis F as a center. Further the camera 70 has the lens barrel 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lens barrel and a camera used for a camera or the like.

  For cameras that can magnify or reduce the subject, that is, zoom photography, a so-called pay-out lens barrel that adjusts the focal length by extending a plurality of lens holders that respectively hold a plurality of lenses in the optical axis direction There is something with.

  As an example of a pay-out type lens barrel, a cam follower is provided around a plurality of lens holders, and a cam body having a cam groove that engages with these cam followers, and a lens holder when the cam body is rotated. And a lens barrel having a guide body provided with a guide hole that prevents the rotation of the lens and allows straight travel.

  In such a lens barrel, when an external force is applied to the extended lens holder, the cam follower of the lens holder tends to come off from the cam groove of the cam body. For this reason, there is a lens barrel in which the shape of the cam follower of the lens holding body and the shape of the guide hole of the guide body are improved to adopt a structure in which the cam follower is not easily detached from the cam groove (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 2002-277711 (Abstract, FIGS. 1 and 3)

  As shown in FIG. 8, in the lens barrel 90 of Patent Document 1, unless the shape of the cam follower 94 of the lens holding body 92 and the shape of the guide hole 98 of the guide body 96 are accurately formed, the cam follower 94 is guided to the guide hole 98. However, if the shape of the cam follower 94 or the guide hole 98 is formed with high accuracy, there is a problem that the manufacturing cost of the lens barrel 90 increases.

  The present invention has been made in order to solve the above-described problems, and the cam follower of the lens holding body can be mounted on the cam body even when an external force is applied in a state where the lens holding body is extended, regardless of a simple configuration. It is an object of the present invention to provide a lens barrel and a camera that reliably prevent the cam groove from coming off.

  To achieve the above object, the present invention provides a first lens holder that holds a first lens that moves in the optical axis direction, a first cam follower provided on the first lens holder, and a rear side of the first lens. A second lens holder disposed on the inside of the first lens holder, a second cam follower provided on the second lens holder, A cam body having a first cam groove engaged with the first cam follower and a second cam groove engaged with the second cam follower on the inner wall, and disposed around the first lens holding body and the second lens holding body. And the second lens holding body is disposed so as to overlap the first cam follower in the radial direction centered on the optical axis in a state where the first lens holding body is extended in the optical axis direction. It is a lens barrel.

  In the present invention, since the first lens holding body is extended in the optical axis direction, the second lens holding body is disposed so as to overlap the first cam follower in the radial direction centered on the optical axis. In spite of a simple configuration, even when an external force is applied in a state where the lens holder is extended, it is possible to reliably prevent the cam follower of the lens holder from coming off the cam groove of the cam body. In this specification and the like, the direction from the lens barrel toward the subject is referred to as the front, and the direction from the subject toward the lens barrel is referred to as the rear.

  It is possible to employ a configuration in which the second lens holder is arranged so as to always overlap the first cam follower in the radial direction with the optical axis as the center. With this configuration, it is possible to always prevent the cam follower of the lens holding body from coming off from the cam groove of the cam body, even if an external force is applied to the lens holding body, despite a simple configuration.

  It has a guide body provided with a first guide hole that engages with the first cam follower and a second guide hole that engages with the second cam follower, and employs a configuration that combines the first guide hole and the second guide hole. Can do. With this configuration, the guide body can be easily created.

  The 1st lens can employ | adopt the structure which is a lens arrange | positioned most forward. With this configuration, it is possible to reliably prevent the cam follower of the lens holding body of the frontmost lens having a long feeding distance from coming off from the cam groove of the cam body.

  The 1st cam follower can employ | adopt the structure integrally molded with the 1st lens holding body. With this configuration, the first cam follower and the first lens holder can be created at the same time, and the manufacturing process can be simplified.

  Another invention is a camera having the lens barrel described above. In the present invention, since the first lens holding body is extended in the optical axis direction, the second lens holding body is disposed so as to overlap the first cam follower in the radial direction centered on the optical axis. Despite the simple configuration, even if an external force is applied while the lens holder is extended from the lens barrel of the camera, the cam follower of the lens holder can be reliably prevented from coming off the cam groove of the cam body. Can do.

  According to another aspect of the invention, a first lens that moves in the optical axis direction, a first lens holder that holds the first lens, a first cam follower provided on the first lens holder, and a rear side of the first lens A second lens that moves in the optical axis direction, a second lens holding body that holds the second lens and that is disposed inside the first lens holding body, and a second lens that is provided on the second lens holding body. A cam body having a cam follower, a first cam groove engaged with the first cam follower and a second cam groove engaged with the second cam follower, a drive mechanism for rotating the cam body around the optical axis, and a first A guide body having a first guide hole that engages with the cam follower and a second guide hole that engages with the second cam follower, and an outer peripheral surface of the second lens holding body connects the first cam follower to the cam body. The first cam follower is the first cam. A camera to prevent from coming off.

  In this invention, the outer peripheral surface of the second lens holding body sandwiches the first cam follower between the cam body and prevents the first cam follower from coming off the first cam groove. Even if an external force is applied while the lens holder is extended from the lens barrel of the camera, the lens barrel is not damaged.

  A third lens that is disposed behind the second lens and moves in the optical axis direction; a third lens holder that holds the third lens; and a third cam follower that is provided on the third lens holder. The cam body may include a third cam groove that engages with the third cam follower, and the guide body may have a third guide hole that engages with the third cam follower. With this configuration, the number of lenses can be increased, so that the focal length of light incident on the camera from the subject can be adjusted more precisely.

  According to the present invention, a lens that reliably prevents the cam follower of the lens holder from coming off the cam groove of the cam body even when an external force is applied in a state where the lens holder is extended, despite the simple configuration. A lens barrel and a camera can be obtained.

  Hereinafter, embodiments of a lens barrel according to the present invention will be described with reference to the drawings. The camera will be described together with the lens barrel.

  FIG. 1 is a cross-sectional end view of a lens barrel 1 according to an embodiment of the present invention. The lens barrel 1 includes a cylindrical first lens holder 10, a first cam follower 12, a cylindrical second lens holder 14, a second cam follower 16, a cylindrical cam body 20, and a cylinder. And a guide body 24 having a shape.

  The first lens holding body 10 holds the first lens 26 that is disposed closest to the subject, that is, the foremost lens among the plurality of lenses. Moreover, in this Embodiment, although the 1st lens 26 and the 1st lens holding body 10 are comprised by the different body, these may be integrally formed by the same member or another member.

  Around the first lens holder 10, three first cam followers 12 (only one is shown in the figure) are provided at equal intervals so that the center angles thereof are about 120 degrees. The three first cam followers 12 have the same position in the direction of the optical axis F (when the optical axis F is used as a coordinate axis, the coordinate values indicating the positions of the three first cam followers 12 are the same). In the lens barrel 1 according to the present embodiment, the first cam follower 12 and the first lens holding body 10 are formed as separate bodies, but these are integrally formed of the same member or different members. May be.

  The second lens holder 14 holds a cylindrical second lens 30 disposed behind the first lens 26. The second lens holding body 14 has a region 14 a that overlaps the first cam follower 12 and the first lens holding body 10 in the radial direction with the optical axis F as the center. Therefore, when the first lens holder 10 is extended from the lens barrel 1 and used, the second lens holder 14 supports the first cam follower 12 even if an external force is applied to the first lens holder 10. Thus, the first cam follower 12 is prevented from coming off from first cam grooves 32a, 32b, and 32c of the cam body 20, which will be described later.

  Around the second lens holder 14, three second cam followers 16 (however, only one is shown) are provided at equal intervals so that their center angles are about 120 degrees. Similarly to the first cam follower 12, the second cam follower 16 has the same position in the optical axis F direction. In the lens barrel 1 according to the present embodiment, the second cam follower 16 and the second lens holding body 14 are formed separately, but these are integrally formed of the same member or different members. May be.

  The lens barrel 1 according to the present embodiment has a third lens holder 36. The third lens holder 36 holds a third lens 38 disposed behind the second lens 30. Around the third lens holder 36, three third cam followers 40 (however, only one is shown) are provided at equal intervals so that the center angles thereof are about 120 degrees. Further, the third cam follower 40 has the same position in the optical axis F direction as the first cam follower 12 and the second cam follower 16.

  In the lens barrel 1 according to the present embodiment, the third cam follower 40 and the third lens holding body 36 are configured as separate bodies, but these are integrally formed of the same member or different members. May be. The first, second, and third cam followers 12, 16, and 40 are all arranged side by side in the optical axis F direction.

  As shown in the developed view of FIG. 5, the cam body 20 is engaged with the first cam groove 32 with which the first cam follower 12 is engaged, the second cam groove 46 with which the second cam follower 16 is engaged, and the third cam follower. A third cam groove 48 is provided on the inner wall. Specifically, the first cam grooves 32a, 32b, 32c with which the three first cam followers 12 are engaged, respectively, the second cam grooves 46a, 46b, 46c with which the three second cam followers 16 are engaged, and the three third cam grooves, respectively. The cam followers 40 have third cam grooves 48a, 48b and 48c, respectively, with which the cam followers 40 are engaged, and are arranged around the first, second and third lens holders 10, 14, and 36.

  As shown in FIG. 5, the first cam grooves 32a, 32b, 32c, the second cam grooves 46a, 46b, 46c, and the third cam grooves 48a, 48b, 48c are partly or entirely spiral. Yes. Further, as the cross-sectional shapes of the first cam groove 32, the second cam groove 46, and the third cam groove 48, for example, an arc shape, a substantially V shape, a substantially U shape, or the like can be adopted.

  The guide body 24 includes a first guide hole through which each of the three first cam followers 12 passes, a second guide hole through which each of the three second cam followers 16 passes, and a third guide through which each of the three third cam followers 40 passes. It has a hole. In the guide body 24 of the lens barrel 1 according to the present embodiment, as shown in FIG. 6, the first, second, and third guide holes are also used, and the three communication guide holes 56, 57, and 58 are provided. Forming. That is, the communication guide hole 56 is used as a first guide hole from the tip end on the subject side to a position slightly away from the rear end portion on the imaging side. A central region excluding both end portions is used as the second guide hole, and a portion from the substantially central portion to the rear end portion on the imaging side is used as the third guide hole. The other communication guide holes 57 and 58 are also used in the same manner. The communication guide holes 56, 57, and 58 are provided at equal intervals so that the center angles of the communication guide holes 56, 57, and 58 are about 120 degrees.

  As described above, the first, second, and third guide holes are communicated to form the guide hole in the guide body 24 as compared to the case where the first, second, and third guide holes are formed independently. Work becomes easier.

  The drive mechanism includes a gear (not shown) that fits on the outer periphery of the cam body 20 and a rotary motor (not shown) that rotates the gear. When the cam body 20 is rotated by the drive mechanism about the optical axis F as the rotation axis, the first, second, and third lens holders 10, 14, and 36 are respectively the first guide hole and the second guide of the guide body 24. It moves in the optical axis F direction while being prevented from rotating by the hole and the third guide hole. The movement mechanism will be described later.

  In addition, the drive mechanism may be comprised from the rotation motor directly connected to the cam body 20 without having a gear, and may have several gears. Further, as the rotary motor, an electric type, magnetic type or electromagnetic type motor can be used.

  Further, the lens barrel 1 according to the present embodiment has a fourth lens 60 behind the third lens 38. The fourth lens 60 is moved in the direction of the optical axis F by a drive motor 62 disposed in close proximity, and adjusts the focusing state of light incident on the camera 70 from the subject.

  Next, the system configuration of the camera 70 including the lens barrel 1 will be described with reference to FIG.

  The camera 70 performs a zooming operation by driving the first, second, and third lens holders 10, 14, and 36 that respectively hold the first, second, and third lenses 26, 30, and 38 in the direction of the optical axis F. A driver 72 that realizes the above, an image signal processing unit 76 that processes an image signal obtained from the image sensor 74, a memory device 78 that stores image data, a memory 80 that temporarily stores an image for electronic processing, The display unit 82 includes a liquid crystal display element that displays an optical image or an electronically processed electronic image, and an MPU (Micro Processing Unit) 84 as a system controller that controls these members.

  The lens barrel 1 includes a mechanical portion of the lens barrel 1 including first, second, and third lens holders 10, 14, and 36 including first, second, and third lenses 26, 30, and 38; It consists of a drive motor 62 and the like.

  Next, a mechanism for moving the first, second, and third lens holders 10, 14, and 36 in the lens barrel 1 in the direction of the optical axis F will be described with reference to FIG.

  First, it is assumed that the first, second, and third lenses 26, 30, and 38 are at the most rearward so-called retracted positions in the respective driving ranges. The positions of the three first, second, and third cam followers 12, 16, and 40 corresponding to the retracted positions are the positions indicated by A in FIG. 5, and the first, second, and third lenses 26, 30, and 38 are provided. Is also the position shown in FIG. When shooting, first, an operation switch (not shown) of the camera 70 is turned on. When the MPU 84 receives the on command, the MPU 84 commands the driver 72 to drive the first, second, and third lenses 26, 30, and 38 forward in the optical axis F direction. Then, the zoom driver 72 supplies a power source to the rotation motor to rotate the cam body 20.

  Even if the cam body 20 rotates in the arrow X direction in FIG. 5, the first, second, and third cam followers 12, 16, and 40 are in a state where the cam body 20 rotates in the arrow X direction in FIG. 5. The rotation in the arrow X direction is restricted by the side walls 56a, 57a, 58a, and the rotation is not performed in the arrow X direction.

  As described above, the first, second, and third lens holders 10, 14, and 36 abut against the communication guide holes 56, 57, and 58 of the guide body 24, so that the first, second, and third lens holders 10 are aligned. , 14, and 36 are prevented from rotating about the optical axis F as a rotation axis. Therefore, the first, second, and third lens holders 10, 14, and 36 are only moved in the direction (forward) along the optical axis F of the cam grooves 32, 46, and 48.

  That is, when the cam body 20 is rotated about the optical axis F as the rotation axis, the portions corresponding to the first guide holes of the communication guide holes 56, 57, 58 prevent the rotation of the first lens holding body 10. The first lens holder 10 is allowed to move in the direction of the optical axis F, and the portions corresponding to the second guide holes of the communication guide holes 56, 57, 58 prevent the second lens holder 14 from rotating, The second lens holder 14 is allowed to move in the direction of the optical axis F, and the portions corresponding to the third guide holes of the communication guide holes 56, 57, 58 prevent the rotation of the third lens holder 36 while preventing the rotation of the third lens holder 36. The movement of the three-lens holder 36 in the optical axis F direction is allowed.

  In this way, the first, second, and third lenses 26, 30, and 38 move from the retracted position to the wide-angle photographing position. The wide-angle shooting position is a position indicated by B in FIG. 5, and is also a position where the first, second, and third lenses 26, 30, and 38 are in the state shown in FIG. When the first, second, and third lenses 26, 30, and 38 are in the wide-angle photographing position, the lens system can be photographed.

  When a zooming instruction is issued in a state where the first, second, and third lenses 26, 30, and 38 are in the wide-angle shooting position, the MPU 84 instructs the driver 72 to zoom. Then, the cam body 20 further rotates in the arrow X direction, and the first, second, and third lenses 26, 30, and 38 move from the wide-angle shooting position to the telephoto shooting position by the same mechanism. The telephoto shooting position is a position indicated by C in FIG. 5 and is also a position where the first, second, and third lenses 26, 30, and 38 are in the state shown in FIG.

  On the contrary, the mechanism by which the first, second, and third lenses 26, 30, and 38 move from the telephoto shooting position to the wide-angle shooting position is as follows.

  When the MPU 84 receives a zooming command for reduction by operating a zoom switch (not shown), the MPU 84 instructs the driver 72 to drive the first, second, and third lens holders 10, 14, and 36 in the direction of the wide-angle shooting position. put out. Then, the driver 72 supplies a power source to the rotary motor and rotates the cam body 20 in the opposite direction to the previous one. Thereby, the cam body 20 rotates in the arrow Y direction of FIG.

  The first, second, and third cam followers 12, 16, and 40 are restricted from rotating in the arrow Y direction by the side walls 56b, 57b, and 58b while the cam body 20 rotates in the arrow Y direction in FIG. And does not rotate in the direction indicated by the arrow X.

  As described above, the first, second, and third lens holders 10, 14, and 36 abut against the communication guide holes 56, 57, and 58 of the guide body 24, so that the first, second, and third lens holders 10 are aligned. , 14, and 36 are prevented from rotating about the optical axis F as a rotation axis. Therefore, the first, second, and third lens holders 10, 14, and 36 are only moved in the direction (backward) along the optical axis F of the cam grooves 32, 46, and 48.

  The first, second, and third cam followers 12, 16, and 40 can move smoothly in the direction of the optical axis F without causing rattling in the arrow X direction and the arrow Y direction. The widths of the communication guide holes 56, 57, and 58 and the outer diameters of the first, second, and third cam followers 12, 16, and 40 are set to each other.

  In this way, the first, second, and third lenses 26, 30, and 38 move from the telephoto shooting position to the wide-angle shooting position. A state in which the first, second, and third lenses 26, 30, and 38 are moving from the telephoto shooting position to the wide-angle shooting position, that is, the first, second, and third lenses 26, 30, and 38 are in the telephoto shooting position. The position between the wide-angle shooting position is a position indicated by D in FIG. 5, and is also a position where the first, second, and third lenses 26, 30, and 38 are in the state shown in FIG.

  When stopping the shooting of the camera 70, an operation switch (not shown) is turned off. Then, the cam body 20 rotates in the arrow Y direction. As a result, by the same mechanism, the first, second, and third lenses 26, 30, and 38 move from the wide-angle shooting position, the telephoto shooting position, and the position therebetween to the retracted position.

  In a state where zoom photographing is performed, the first, second, and third lenses 26, 30, and 38 are at a wide-angle photographing position, a telephoto photographing position, and a position therebetween. At this time, at least the first lens holder 10 is in a position extended from the lens barrel 1. In the lens barrel 1 according to the present embodiment, the second lens holder 14 has a region 14a that overlaps the first cam follower 12 and the first lens holder 10 in the radial direction with the optical axis F as the center. Even when an external force is received when the one lens holder 10 is extended from the lens barrel 1, the second lens holder 14 supports the first cam follower 12, and the first cam follower 12 is the first cam groove of the cam body 20. It is prevented from coming off from 32a, 32b, 32c.

  Further, a region 14a that overlaps the first lens holding body 10 in the radial direction centered on the optical axis F of the second lens holding body 14 is always in a state in which the first lens holding body 10 is extended most, and a part thereof is always present. It is comprised so that it may overlap, and it can prevent reliably that the 1st cam follower 12 remove | deviates from the cam groove 32. FIG. That is, the outer peripheral surface of the second lens holder 14 is always sandwiched in cooperation with the cam body 20 so as to support the base of the first cam follower 12 at the wide-angle shooting position, the telephoto shooting position, or an intermediate position. Yes.

  Although the present embodiment described above is a preferred example of the present invention, various modifications can be made without departing from the scope of the present invention. For example, when the first, second, and third lenses 26, 30, and 38 are in the telephoto shooting position, the second lens holder 14 holds the first cam follower 12 and the first lens in the radial direction centered on the optical axis F. The body 10 may not be supported. That is, there may be an unsupported state (a state where the second lens holding body 14 does not overlap the first cam follower 12 and the first lens holding body 10 in the radial direction around the optical axis F).

  In the lens barrel 1 according to the present embodiment, the lens holders 10, 14, 36, the guide body 24, and the cam body 20 are arranged in this order from the inner side to the outer side in the radial direction around the optical axis F. However, instead of this, the lens holders 10, 14, 36, the cam body 20, and the guide body 24 may be arranged in this order from the inner side to the outer side in the radial direction with the optical axis F as the center. .

  In addition, the third lens holder 36 is also used when the first, second, and third lens holders 10, 14, and 36 are at a telephoto position or a position between the telephoto position and the wide-angle position. You may make it overlap with the 2nd lens holding body 14 in the radial direction centering on the optical axis F. FIG.

  Further, in the lens barrel 1 according to the present embodiment, three cam followers 12, 12, 12, 16, 16, 16, 40, 40, 40 are provided in each of the lens holders 10, 14, 36. However, the number may be four or more, and in some cases, the number may be two or less. In the lens barrel 1 according to the present embodiment, the guide body 24 is provided. However, the lens holders 10, 14, and 36 are directly attached without the guide body 24 and without rotating the cam body 20. The lens may be moved in the optical axis F direction by driving and moving in cam grooves 32, 46, and 48 formed in the optical axis F direction.

  Further, in the lens barrel 1 according to the present embodiment, the three lenses 26, 30, and 38 that move in the direction of the optical axis F by rotating the cam body 20 are provided. However, by rotating the cam body 20, The number of lenses moving in the direction of the optical axis F may be two or four or more.

  The present invention can be applied to various optical devices such as an optical camera and a digital camera. Further, the present invention can be applied to a mobile device such as a mobile phone having a camera function. Further, it can be incorporated into an electronic device having a lens position switching mechanism.

It is the lens barrel which concerns on embodiment of this invention, and is the end elevation which made the cross section in the state which has a lens in a wide angle imaging position. It is the lens barrel which concerns on embodiment of this invention, and is the end elevation which made the cross section in the state which has a lens in a retracted position. It is the lens barrel which concerns on embodiment of this invention, and is the end elevation which made the cross section in the state which has a lens in a telephoto shooting position. FIG. 4 is an end view of the lens barrel according to the embodiment of the present invention, in which the lens is in a cross-section in a state where the lens is between a telephoto shooting position and a wide-angle shooting position. It is a plane development view showing the inner wall of the cam body of the lens barrel according to the embodiment of the present invention. It is a plane development view showing an inner wall of a guide for a lens barrel according to an embodiment of the present invention. It is a block diagram which shows the system configuration | structure of the camera which concerns on embodiment of this invention. It is principal part sectional drawing which shows the conventional lens barrel, (a) is sectional drawing cut | disconnected by the cut surface parallel to an optical axis including an optical axis, (b) is the II line | wire of (a) It is sectional drawing cut | disconnected by.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens barrel 10 1st lens holding body 12 1st cam follower 14 2nd lens holding body 16 2nd cam follower 20 Cam body 24 Guide body 26 1st lens 30 2nd lens 32 1st cam groove 36 3rd lens holding body 38 Third lens 40 Third cam follower 46 Second cam groove 48 Third cam groove 56, 57, 58 Communication guide hole 70 Camera F Optical axis

Claims (8)

A first lens holder that holds a first lens that moves in the optical axis direction;
A first cam follower provided on the first lens holder;
A second lens holder disposed behind the first lens and holding the second lens moving in the optical axis direction; and disposed inside the first lens holder;
A second cam follower provided on the second lens holder;
A first cam groove that engages with the first cam follower and a second cam groove that engages with the second cam follower are provided on the inner wall, and are disposed around the first lens holding body and the second lens holding body. Cam body,
Have
In a state where the first lens holder is extended in the optical axis direction, the second lens holder is arranged so as to overlap the first cam follower in a radial direction centered on the optical axis. A lens barrel characterized by having a lens barrel.   2. The lens barrel according to claim 1, wherein the second lens holding body is disposed so as to always overlap the first cam follower in a radial direction centered on the optical axis. A guide body having a first guide hole that engages with the first cam follower and a second guide hole that engages with the second cam follower;
The lens barrel according to claim 1 or 2, wherein the first guide hole and the second guide hole are also used.   The lens barrel according to any one of claims 1 to 3, wherein the first lens is a lens arranged at the forefront.   5. The lens barrel according to claim 1, wherein the first cam follower is integrally formed with the first lens holder. 6.   A camera comprising the lens barrel according to claim 1. A first lens that moves in the direction of the optical axis;
A first lens holder for holding the first lens;
A first cam follower provided on the first lens holder;
A second lens disposed behind the first lens and moving in the optical axis direction;
A second lens holder that holds the second lens and is disposed inside the first lens holder;
A second cam follower provided on the second lens holder;
A cam body having a first cam groove with which the first cam follower is engaged and a second cam groove with which the second cam follower is engaged;
A drive mechanism for rotating the cam body about the optical axis as a rotation axis;
A guide body having a first guide hole that engages with the first cam follower and a second guide hole that engages with the second cam follower;
Have
An outer peripheral surface of the second lens holding body sandwiches the first cam follower between the cam body and prevents the first cam follower from being detached from the first cam groove. A third lens disposed behind the second lens and moving in the optical axis direction;
A third lens holder for holding the third lens;
A third cam follower provided on the third lens holder;
Have
The cam body includes a third cam groove with which the third cam follower is engaged,
The camera according to claim 7, wherein the guide body has a third guide hole that engages with the third cam follower.

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