JP2010191354A - Lens barrel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive lens barrel, having high grade of appearance and excellent shock resistance. <P>SOLUTION: An inner narrowed part 24b narrowed inward in the radial direction from a cylindrically-formed fitting part 24a of a cover member 24 is fitted to a slip-off preventing structure formed on the outer peripheral surface at the distal end side of a cylinder member 22. In the slip-off preventing structure, projection fitting parts 22a are partially projected in one or two or more portions on the outer peripheral surface of the peripheral edge of an opening at the distal end side of the cylinder member 22, claw parts 22b which are projections are projected parallel through a relief recess 22d formed by a stepped-down outer peripheral surface at the inner part of the projection fitting part 22a, and a relief recess 22h formed by a stepped-down outer peripheral surface is formed at the inner part of the claw parts 22b, whereby when the cover member 24 is fitted to the cylinder member 22, the inner peripheral surface of the fitting part 24a of the cover member 24 is supported by the projection fitting parts 22a, and the inner peripheral surface of the inner narrowed part 24b is locked on the claw parts 22b so that locking is achieved in the locking state where the free end of the inner narrowed part 24b is entrapped into the relief recess 22h. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lens barrel used in optical equipment such as various cameras and imaging devices.

  2. Description of the Related Art Conventionally, a film camera using a silver salt film and a digital camera capable of photographing with an image sensor have been widely used.

  In recent years, for the purpose of improving the portability of the camera, etc., technical development of an internal mechanism for reducing the size of the camera and increasing the focal length change rate (zoom magnification) has progressed, and various techniques have been proposed. . Along with this, in the field of cameras, a technique for building a high-quality camera at low cost has been proposed in order to win price competition in the market.

  In general, there are zoom cameras that can change the focal length of a photographic lens and single-focus cameras that have a fixed focal length. These cameras are small when the camera is not shooting (when the camera is turned off), and the focal length can be changed when shooting (when the camera is turned on). There is a lens barrel that uses a configured lens barrel.

  Furthermore, in the field of cameras, while miniaturization is being promoted in order to realize easy portability, technology development that can realize a high-quality and low-cost camera that will motivate users to purchase is being promoted. .

  Conventionally, as a lens barrel used for such an optical apparatus such as a camera, there has been proposed a lens ring that attaches and detaches a cosmetic ring that looks good to a user (see, for example, Patent Document 1). .

  In this conventional lens barrel, a plurality of claw portions protruding radially inward from the inner peripheral surface of the decorative ring are configured to be engaged with the retaining recesses of the cylindrical member. Furthermore, this conventional lens barrel is provided with a shallow groove-like relief groove that is continuous in the circumferential direction with respect to the retaining recess. When removing the decorative ring, the engagement between the claw portion of the decorative ring and the retaining recess of the cylindrical member is released by the guide of the escape groove shallower than the retaining recess.

  Further, in order to pursue low cost, it is conceivable that such a lens barrel is manufactured by an operation process in which a decorative ring is bonded to the lens barrel with an adhesive and the remaining adhesive is wiped off. Further, in such a lens barrel, in order to avoid a complicated and labor-intensive work process for bonding the decorative ring, the mounting opening on the decorative ring side is elastically deformed with respect to the mounting end of the lens barrel. Can be combined. Further, in such a lens barrel, it is conceivable that the makeup ring itself is abolished by deteriorating the quality.

JP 11-006947 A

  However, in the conventional lens barrel, the configuration in which the plurality of claw portions protrude radially inward from the inner peripheral surface of the decorative ring is a premise that the component is formed by molding. For this reason, the structure which makes a some nail | claw part protrude in the radial direction inner side from the inner peripheral surface of a ring with respect to the metal ring essential for comprising in high quality was not able to be formed by molding.

  Moreover, in a metal ring, the several nail | claw part made to protrude in a radial direction inner side from the internal peripheral surface is producible by die-casting or a metal shaving process. However, when a metal ring is manufactured by die-casting or metal shaving, the processing cost is high and it is not suitable for mass production. For this reason, in the lens barrel, it has been difficult to provide a high-quality and low-cost product in which a metal ring is attached to the tip of the lens barrel.

  Further, in the lens barrel, if a metal ring is attached to the tip, not only the appearance but also the impact resistance of the barrel is effective. For example, in a lens barrel, when a metal ring is put on the outer periphery of the tip of the cylindrical member, the cylindrical member is kept in a perfect circle with respect to the decorative ring of the mold even when the cylindrical member is momentarily greatly deformed by an impact caused by dropping or the like. The power to do so is stronger and superior. For this reason, in a lens barrel, it is desired to attach a metal ring from a functional standpoint.

  An object of the present invention is to provide an inexpensive lens barrel having high appearance quality and excellent impact resistance.

  In order to achieve the above object, a lens barrel according to claim 1 is a lens barrel having a cover member detachably attached around an opening on one end side of the cylindrical member. A mounting structure for fitting the inner throttle portion, which is squeezed radially inward from the formed fitting portion, onto the retaining structure formed on the outer peripheral surface on one end side of the cylindrical member, A ridge fitting portion of a ridge partially provided on one or a plurality of locations on the outer peripheral surface on one end side of the cylindrical member, and the cylindrical member with respect to the ridge fitting portion. A protrusion claw portion provided in parallel to the protrusion fitting portion on the other end side of the cover member, and an inner peripheral surface of the fitting portion of the cover member is supported by the protrusion fitting portion. The inner peripheral surface of the inner throttle portion is locked to the claw portion, and the free end portion of the inner throttle portion enters the relief recess on the other end side of the claw portion. Characterized in that it is engaged in a locked state've got.

  In order to achieve the above object, the lens barrel according to claim 3 is a lens barrel having a cover member detachably attached around an opening on one end side of the cylindrical member. A mounting structure is provided for fitting the inner throttle portion, which is squeezed radially inward from the formed fitting portion, onto the retaining structure formed on the outer peripheral surface on one end side of the cylindrical member, and the cylindrical member is removed. A stop structure is provided on the outer peripheral surface on one end side of the cylindrical member, with a plurality of fitting ribs provided with a plurality of protrusions in parallel over the entire circumference in the circumferential direction, and the plurality of fitting ribs. And a claw portion which is a protrusion provided on the other end side of the cylindrical member over the entire circumference in parallel with the multiple fitting ribs, and the fitting of the cover member The inner peripheral surface of the inner throttle portion is supported by multiple fitting ribs, the inner peripheral surface of the inner throttle portion is locked to the claw portion, and the inner throttle portion Wherein the free end portion is locked in a locked state that has entered the other end of the relief for the recess from the claw portion.

  According to the present invention, it is possible to provide a lens barrel that is inexpensive and has a high-quality appearance and excellent impact resistance.

1 is an overall schematic perspective view showing a camera including a lens barrel according to a first embodiment of the present invention. It is a disassembled perspective view which takes out and shows the lens-barrel concerning this 1st Embodiment. It is a disassembled perspective view which takes out and shows the 2nd metal ring member and movable cam ring in the lens-barrel concerning this 1st Embodiment. It is a longitudinal cross-sectional view of the moving cam ring of the state which attached the 2nd metal ring member concerning this 1st Embodiment, (B) is an expanded sectional view of the X section. It is a disassembled perspective view which takes out and shows the 2nd metal ring member and moving cam ring in the lens-barrel concerning 2nd Embodiment of this invention. (A) is a longitudinal cross-sectional view of the moving cam ring in a state in which the second metal ring member according to the second embodiment of the present invention is attached, and (B) is an enlarged cross-sectional view of the X portion thereof. It is a longitudinal cross-sectional view which shows the state at the time of starting the operation | movement which mounts the 2nd metal ring member concerning 2nd Embodiment of this invention to a movable cam ring.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is an overall schematic perspective view showing a camera provided with a lens barrel according to a first embodiment of the present invention.

  FIG. 2 is an exploded perspective view showing the lens barrel according to the first embodiment.

  FIG. 3 is an exploded perspective view showing the second metal ring member and the moving cam ring in the lens barrel according to the first embodiment.

  FIG. 4A is a longitudinal sectional view of the moving cam ring in a state where the second metal ring member according to the first embodiment is attached, and FIG. 4B is an enlarged sectional view of the X portion.

  In FIG. 1, reference numeral 1 denotes a camera body. A lens barrel 2 is mounted on the front surface of the camera body 1 so that the focal length of the photographic lens can be changed.

  The lens barrel 2 of the camera body 1 is configured in two stages: a first group barrel 21 that is a telescopic barrel member and a movable cam ring 22 that is also a barrel member. A first metal ring member 23, which is an annular cover member for improving the appearance of the appearance, is mounted around the distal end opening portion on the distal end side of the first group barrel 21 that is a telescopic cylinder member. Yes. The moving cam ring 22 is mounted with a moving cam ring 22 for improving the appearance of the appearance.

  A lens barrier device 3 (shown in an open state in FIG. 1) is mounted on the front surface of the first group barrel 21 to open and close the optical path of the photographing lens as the camera is turned on and off.

  Further, the camera body 1 is provided with a light emission window portion 4 constituting a strobe device that irradiates a subject with illumination light on an upper surface thereof, and a finder window 5 is provided on the front surface thereof.

  Further, on the upper surface of the camera body 1, a release button 6 of a two-stage push operation type for starting a shooting preparation operation (focus adjustment operation and photometry operation) and a shooting operation (exposure to an image sensor such as a film or a CCD). Is installed.

  Further, as shown in the exploded perspective view of FIG. 2, the lens barrel 2 includes a first group barrel 21, a second group barrel 7, a moving cam ring 22, a rectilinear barrel 8, a fixed barrel 9, and a third group barrel 10. And a base member 11.

  The first group lens barrel 21 holds the first group photographing lens and includes the lens barrier device 3. The second group lens barrel 7 holds a second group photographing lens and includes an anti-vibration lens mechanism and a shutter / aperture mechanism. The moving cam ring 22 includes a drive cam for driving the first group barrel 21 and the second group barrel 7 on the inner peripheral portion, and has a gear portion to which power is transmitted from a barrel drive motor (not shown).

  Further, the rectilinear barrel 8 is rotatably held by the movable cam ring 22 and restricts the first group barrel 21 and the second group barrel 7 to go straight. The fixed cylinder 9 includes a drive cam for driving the moving cam ring 22 on the inner peripheral portion. The third group barrel 10 holds the third group photographing lens. The base member 11 includes an image sensor.

  The second metal ring member 24 used in the lens barrel 2 is manufactured by drawing a metal annular material. As shown in FIG. 4, the second metal ring member 24 has a fitting portion 24a formed in a straight cylindrical shape, and is narrowed down into a truncated cone shape radially inward from the end opening of the fitting portion 24a. And an inner diaphragm portion 24b.

  In the second metal ring member 24, the straight shape of the fitting portion 24a is formed by a normal drawing process. At this time, in a normal drawing process, it is normal that a portion extending from the position of the straight end portion in the fitting portion 24a slightly warps outward in the radial direction. Therefore, in the processing of the second metal ring member 24, the inner throttle portion 24b is formed by narrowing the portion extending from the position of the end opening portion of the fitting portion 24a to the inside by making full use of the drawing technique.

  On the outer peripheral surface of the movable cam ring 22, at one or a plurality of locations on the distal end side of the opening (one end side of the cylindrical member on the subject side), a retaining structure is partially provided over a predetermined range in the circumferential direction. A protrusion having a semicircular cross section is provided to form the protrusion fitting portion 22a.

  Furthermore, in this retaining structure for the movable cam ring 22, the claw portion is a protrusion having a semicircular cross section in the same length range in the circumferential direction in parallel with the protrusion fitting portion 22a at a predetermined interval. 22b is projected.

  Thereby, in this retaining structure of the movable cam ring 22, a space 22d, which is an escape recess formed by a lower outer peripheral surface, is set between the protrusion fitting portion 22a and the claw portion 22b.

  Further, in this retaining structure of the moving cam ring 22, the rear side of the claw portion 22b (on the outer peripheral surface of the moving cam ring 22, the tip side of the opening (in addition to the protrusion fitting portion 22a opposite to the subject side). On the end side), a relief recess 22h formed by a lower outer peripheral surface is provided.

  Further, a rectangular trapezoidal protrusion 22i is provided at both ends of the protrusion fitting portion 22a and the claw portion 22b. A guide peripheral portion 22e is formed on the projecting portion 22i by chamfering a portion continuous with the outer corner portion at the tip of the opening of the movable cam ring 22.

  Next, the order of the operation of detachably attaching the second metal ring member 24 to the movable cam ring 22 will be described with reference to FIG.

  In the operation of detachably attaching the second metal ring member 24, the second metal ring member 24 is pushed rightward toward the movable cam ring 22 toward FIG. Then, the distal end (φD2) of the inner throttle portion 24b of the second metal ring member 24 is guided by a guide peripheral edge portion 22e formed by chamfering the outer corner portion of the distal end of the opening of the movable cam ring 22, and radially outward. It passes through the protrusion fitting portion 22a while being pushed and spread. And the front-end | tip of the inner aperture | diaphragm | squeeze part 24b falls in the space 22d between the protrusion fitting part 22a and the nail | claw part 22b. When the second metal ring member 24 is further pushed in, the leading end of the inner throttle portion 24b gets over the claw portion 22b and falls into the relief recess formed on the moving cam ring 22 on the rear side of the claw portion 22b. It becomes a state.

  In this locked state, the elastic deformation of the inner throttle portion 24b toward the radially outer side is released, and the difference between the outermost diameter φD1 of the claw portion 22b and the innermost diameter φD2 of the distal end portion of the inner throttle portion 24b is a radial amount. Thus, the retaining state is achieved, and the mounting operation is completed. Here, the retaining structure of the moving cam ring 22 is configured so that the outermost diameter φD1 of the claw portion 22b> the innermost diameter φD2 of the distal end portion of the inner throttle portion 24b.

  That is, in this retaining structure of the movable cam ring 22, when the cover member 24 is fitted to the cylindrical member 22, the inner peripheral surface of the fitting portion 24a of the cover member 24 is supported by the protrusion fitting portion 22a. Like that. Furthermore, in this retaining structure of the movable cam ring 22, the inner peripheral surface of the inner throttle portion 24b is locked to the claw portion 22b, and the free end portion of the inner throttle portion 24b is locked into the escape recess. It is configured to be locked.

  In this locked state, the locking strength in the state of mounting in the optical axis direction (elastically locked state) is determined by this difference D1-D2. The mounting condition in the radial direction is determined by the shapes and dimensions of the protrusion fitting portions 22a and 24a of the movable cam ring 22 and the second metal ring member 24, respectively.

  Next, a configuration capable of suppressing the deformation of the moving cam ring 22 from a perfect circle to a triangular shape when a cam groove is formed in the moving cam ring 22 by molding will be described with reference to FIG.

  In the movable cam ring 22, as shown in FIG. 3, a protrusion fitting portion 22a and a claw portion 22b are formed at three locations equally divided in the circumferential direction. A groove portion 22c is disposed at a position between the protrusion fitting portions 22a and the claw portions 22b arranged at these three locations.

  When the second metal ring member 24 is fitted and attached to the moving cam ring 22, the inner metal narrowed portion 24 b of the second metal ring member 24 is fitted at the three protrusions of the moving cam ring 22. The portion 22a is pushed outward. At this time, the inner narrowed portion 24b of the second metal ring member 24 is expanded by the protrusion fitting portions 22a arranged at three locations. At the same time, the inner throttle portion 24b is elastically deformed so that the portion between the adjacent protrusion fitting portions 22a falls inward in the radial direction. The portion of the inner throttle portion 24b that has fallen inward in the radial direction is accommodated in the groove 22c, so that the operation of the inner throttle portion 24b being pushed outward by the protrusion fitting portion 22a is not hindered.

  Therefore, the inner throttle portion 24b of the second metal ring member 24 gets over the protrusion fitting portion 22a and the claw portion 22b, and fits into the escape recess 22h and the groove portion 22c of the movable cam ring 22, and is in the engaged state. Become.

  In the engaged state where the second metal ring member 24 is attached to the movable cam ring 22, the second metal ring member 24 is spread outward by the claw portions 22b and the protrusion fitting portions 22a arranged at predetermined three locations. The reaction force at that time acts on the moving cam ring 22. In other words, the urging force in the direction of the center line of the moving cam ring 22 acts on the moving cam ring 22 at three portions where the claw portion 22b and the protrusion fitting portion 22a are provided.

  In this lens barrel 2, the second metal ring member 24 has the claw portion 22 b and the protrusion fitting portion 22 a of the moving cam ring 22 that are deformed in a triangular shape when a cam groove is molded in the moving cam ring 22. It is suppressed by the action of pressing certain three parts.

  As shown in FIG. 3, the movable cam ring 22 has a circular shape due to the cam groove and the uneven thickness of the base portion where the groove is cut when a cam groove of 120 ° is formed on the inner periphery by molding. The power may be slightly deformed to form a triangle shape. The deformed shape of the triangle formed by this molding is determined by the phase of the cam groove. Therefore, the moving cam ring 22 has a claw portion 22b and a protrusion fitting portion 22a disposed in the vicinity of a deformed portion that protrudes as a vertex of a deformed triangle. In this case, when the second metal ring member 24 is attached to the movable cam ring 22, a force acts in a direction to return the triangular deformation to a circle, and the deformation can be suppressed. In this case, the outermost diameter φD1 of the claw portion 22b and the inner throttle portion 24b of the second metal ring member 24 are lightly press-fitted, and the second metal ring member 24 presses the movable cam ring 22 radially inward. It is desirable to apply an appropriate force.

  In the first embodiment, the configuration in which the protrusion fitting portions 22a and the claw portions 22b are equally provided at three locations has been described. However, in the lens barrel 2 according to the first embodiment, the protrusion fitting portions 22a and the claw portions 22b are not necessarily required to be three places equally, and a plurality of places may be provided unevenly. . However, even in that case, it is desirable to provide the groove 22c in the middle. In the first embodiment, the case of the movable cam ring 22 and the second metal ring member 24 has been described, but the first group barrel 21 and the first metal ring member 23 are configured similarly.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  FIG. 5 is an exploded perspective view showing the second metal ring member and the moving cam ring in the lens barrel according to the second embodiment of the present invention.

  FIG. 6A is a longitudinal sectional view of the moving cam ring in a state where the second metal ring member according to the second embodiment of the present invention is attached, and FIG. 6B is an enlarged sectional view of the X portion thereof. is there.

  FIG. 7 is a longitudinal sectional view showing a state when the operation of mounting the second metal ring member according to the second embodiment of the present invention on the movable cam ring is started.

  In the lens barrel 2 according to the second embodiment, in the structure in which the second metal ring member 24 is attached to the movable cam ring 22, a stopper is provided over the entire circumference of the movable cam ring 22 in the circumferential direction. When configured in this manner, the second metal ring member 24 can be stabilized in the radial engagement of the second metal ring member 24 with respect to the second metal ring member 24.

  The retaining stopper provided over the entire circumference in the circumferential direction of the movable cam ring 22 is constituted by a double fitting rib 22g and a claw portion 22b.

  The multiple fitting ribs 22g are provided on the outer peripheral surface of the movable cam ring 22 on the distal end side (subject side) of the opening peripheral portion, and in the circumferential direction, a plurality of (two in this case). ) Ring-shaped ridges projecting in parallel.

  Further, a claw portion 22b is disposed on the outer peripheral surface of the opening peripheral edge of the movable cam ring 22 on the back side of the double fitting rib 22g (on the opposite side of the subject from the double fitting rib 22g). . The claw portion 22b has a single ring-shaped protrusion protruding in parallel with the double fitting rib 22g on the outer peripheral surface of the movable cam ring 22 in the circumferential direction over the entire circumference. Configure.

  Further, the retaining provided on the movable cam ring 22 is prevented from coming off in the optical axis direction by the difference in height between the outermost diameter φD1 of the claw portion 22b and the innermost diameter φD2 of the distal end portion of the inner throttle portion 24b. The second metal ring member 24 is fitted with the outermost diameter of the rib 22g.

  Further, in the retaining provided on the movable cam ring 22, as shown in FIG. 4, the above-mentioned protrusion fitting portion 22a shown in FIG. A relief recess 22f is provided. Further, in the retaining provided in the moving cam ring 22, a space 22d which is a relief recess formed by a lower outer peripheral surface is provided between the fitting rib 22g and the claw portion 22b.

  Further, in this structure for preventing the moving cam ring 22 from coming off, it is formed with an outer peripheral surface that is one step lower than the claw portion 22b (on the outer peripheral surface of the moving cam ring 22 on the side opposite to the distal end side (subject side) of the opening). The escape recess 22h is provided.

  In the retaining provided on the movable cam ring 22, the fitting rib 22 g and the claw portion 22 b are formed on the entire circumference. Therefore, the operation of incorporating the second metal ring member 24 into the movable cam ring 22 is performed as follows. To do.

  In the retaining provided in the movable cam ring 22, there is a difference D3-D2 between the innermost diameter φD2 of the inner throttle portion 24b of the second metal ring member 24 and the outermost diameter φD3 of the fitting rib 22g. Therefore, it is necessary to incorporate the second metal ring member 24. Here, in the operation of actually incorporating the second metal ring member 24, since the fitting rib 22g has one round in the circumferential direction, the entire circumference of the second metal ring member 24 is radial when trying to be mounted parallel to the optical axis. It's going to push outwards and won't fit.

  Therefore, in the operation of incorporating the metal ring member 24, as shown in FIG. 7, the metal ring is slightly inclined rather than parallel to the optical axis, and the circumferential portion of the opening gradually exceeds the fitting rib 22g first. It fits so that another part may exceed fitting rib 22g. In this operation, the front end of the inner throttle portion 24b of the second metal ring member 24 enters the first escape recess 22f so that the entire circumference thereof is opened, so that the deformation of the inner throttle portion 24b is released. Then, by repeating the same operation, the two fitting ribs 22g are moved over one by one, and the free end portion of the inner throttle portion 24b of the second metal ring member 24 is accommodated in the escape recess 22h. It is mounted until the engaged state of FIG.

  Further, in order to enable the work of incorporating the metal ring member 24 into the movable cam ring 22 by the above-described operation, the double fitting ribs 22g are arranged at a required short interval in the optical axis direction. It is necessary to configure.

  For example, if the first fitting rib 22g located closest to the subject is disposed at a position far from the tip of the moving cam ring 22, the second metal ring member 24 cannot be incorporated into the moving cam ring 22. . This is because the second metal ring member 24 is incorporated, so that when the second metal ring member 24 is tilted, the diameter overcoming the fitting rib 22g is large even if the deformation of the tip of the inner throttle portion 24b with φD2 is included. It is because it becomes impossible to incorporate too much.

  Therefore, in the retaining structure provided on the movable cam ring 22, the portion ahead of the first fitting rib 22g is fitted with a dimension that takes into account the deformation of the opening tip φD2 of the inner throttle portion 24b so that the pitch does not increase. The mating rib 22g is disposed at a short distance in the optical axis direction. Thus, when the relief recess 22f is configured in small increments, the second metal ring member 24 can be incorporated even if there is a claw portion 22b and a fitting rib 22g formed around the circumference. A stronger bond is possible.

  The configuration, operation, and effects of the second embodiment of the present invention other than those described above are the same as those of the first embodiment described above. Description is omitted. Further, the present invention is not limited to the above-described embodiment, and it is needless to say that various other configurations can be adopted without departing from the gist of the present invention.

2 barrel 21 first group barrel 22 moving cam ring 23 first metal ring member 24 second metal ring member 22b claw portion 22g fitting rib 22f groove portion 24b inner throttle portion

Claims (3)

In the lens barrel in which the cover member is detachably attached around the opening on the one end side of the cylindrical member,
A mounting structure for fitting an inner throttle portion that is squeezed radially inward from a fitting portion formed in a cylindrical shape of the cover member to a retaining structure formed on an outer peripheral surface on one end side of the cylindrical member. Configure
A retaining structure for the tubular member,
On the outer peripheral surface on the one end side of the cylindrical member, a ridge fitting portion of a ridge partially provided at one or a plurality of locations, and
On the other end side of the cylindrical member with respect to the ridge fitting portion, a ridge claw portion provided in parallel with the ridge fitting portion,
The inner peripheral surface of the fitting portion of the cover member is supported by the protrusion fitting portion, the inner peripheral surface of the inner throttle portion is locked to the claw portion, and the free end portion of the inner throttle portion is the other of the claw portion. A lens barrel, wherein the lens barrel is locked in a locked state that has entered into a recess for relief on the end side. When the cam groove is formed in the cylindrical member, the protrusion fitting portion and the claw portion are arranged in the vicinity of a portion that is deformed so that a part thereof protrudes,
When the cover member is attached, the cover member is deformed so that a part thereof protrudes by forming the cam groove by a biasing force that biases the protrusion fitting portion and the claw portion radially inward. The lens barrel according to claim 1, wherein the lens barrel is configured to suppress this. In the lens barrel in which the cover member is detachably attached around the opening on one end side of the cylindrical member,
Constructs an attachment structure that fits the inner throttle portion that is squeezed radially inward from the fitting portion formed in the cylindrical shape of the cover member to the retaining structure formed on the outer peripheral surface on one end side of the cylindrical member. And
A retaining structure for the tubular member,
A plurality of fitting ribs provided with a plurality of protrusions in parallel over the entire circumference in the circumferential direction on the outer peripheral surface on one end side of the cylindrical member;
On the other end side of the tubular member with respect to the multiple fitting ribs, there are claw portions that are protrusions provided over the entire circumference in the circumferential direction in parallel with the multiple fitting ribs. ,
The inner peripheral surface of the fitting portion of the cover member is supported by multiple fitting ribs, the inner peripheral surface of the inner throttle portion is locked to the claw portion, and the free end portion of the inner throttle portion is other than the claw portion. A lens barrel, wherein the lens barrel is locked in a locked state where it has entered the recess for escape on the end side.

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