JP7397662B2 - Fitting structure of frame member and groove, lens barrel - Google Patents

Description

The present invention relates to a fitting structure between a frame member and a groove, and a lens barrel.

In a lens barrel having a plurality of lens groups, zooming or focusing operations are performed by moving each lens group in the optical axis direction. In order to move the lens group in the optical axis direction, a cam groove is provided in the cam tube that is inclined with respect to the optical axis direction, and a frame member is provided upright on the cylinder body or lens holding frame that holds the lens group. A fitting structure in which a piece member is fitted into a cam groove is widely used. FIG. 7 is a cross-sectional view orthogonal to the cam groove, showing a fitting structure between the cam groove and the block member according to the prior art. As shown in FIG. 7, in this fitting structure 300, a piece member 210 is provided upright on the sliding tube 206, and this piece member 210 is fitted into a cam groove 220 of the cam tube 208. The piece member 210 has a piece shaft 214 having a shaft portion 214G arranged on the surface of the sliding tube 206 on the cam cylinder 208 side, and this piece shaft 214 is fixed with a piece screw 212, and the piece shaft 214 is fixed around the shaft portion 214G of the piece shaft 214. It is constructed by attaching a top 216. Further, a cam groove 220 consisting of a through groove formed to be inclined with respect to the optical axis direction is formed in the cam tube 208 constituting the lens barrel. The piece 216 of the piece member 210 is fitted into the cam groove 220 without any gap. According to such a configuration, when the cam cylinder 208 rotates with respect to the sliding cylinder 206, the top 216 moves along the cam groove 220, and the sliding cylinder 206 moves in the optical axis direction.

When such a lens barrel is dropped and the sliding barrel 206 collides with the ground, a force in the optical axis direction is generated between the sliding barrel 206 and the cam barrel 208, and this force is applied to the frame 216 as an impact. It will get damaged. For this reason, it is conceivable to increase the number of cam grooves 220 and piece members 210 to disperse the impact acting on the pieces. However, if the number of cam grooves 220 and the piece members 210 are increased, the design of the members, especially the arrangement of the cam grooves, becomes difficult, and assembly becomes very time-consuming.

Therefore, as shown in FIG. 8, a large diameter part 314B on the sliding cylinder 206 side and a small diameter part 314C on the cam cylinder 208 side are formed in the shaft part 314G of the top shaft 314, and around the small diameter part 314C. A mating configuration 400 with attached piece 316 is proposed. In this fitting configuration 400, the piece 316 fits into the cam groove 220 without any gap, and a gap is provided between the piece shaft 314 and the side surface of the cam groove 220. When a force in the optical axis direction is applied between the sliding tube 206 and the cam tube 208, the large diameter portion 314B of the top shaft 314 comes into contact with the wall surface of the cam groove 220 when the top 316 deforms slightly. This prevents excessive impact from acting on the top 316 and prevents the top 316 from being damaged. Patent Document 1 discloses a structure that prevents the breakage of the top in the same way as the structure shown in FIG. A configuration is disclosed.

Japanese Patent Application Publication No. 2008-191328

However, in the configuration shown in FIG. 8, since the cam groove 220 is a through groove, there is a risk that the cam groove 220 may fall into the lens barrel during a zooming operation or the like. On the other hand, as shown in FIG. 9, a fitting configuration 500 may be considered in which a bottom surface 308A is provided in the cam groove 320 of the cam cylinder 308 to prevent the piece 316 from coming off. However, in such a configuration, the thickness of the cam barrel 308 increases, making the lens barrel larger and causing an increase in weight.

The present invention has been made in view of the above problems, and provides a fitting between a frame member and a groove that can prevent the frame from falling off and prevent the frame from being damaged in the event of an impact, without increasing the size of the lens barrel. The purpose is to provide a structure and a lens barrel.

The fitting structure of the frame member and the groove of the present invention includes a frame member provided on a first member in a lens drive mechanism of a lens barrel, and a first frame member located on one side in the radial direction with respect to the first member. A fitting structure with a first groove provided in a second member movable relative to the member, wherein the first groove has a narrow portion and a portion of the first member that is smaller than the narrow portion. a wide portion formed on the side and wider than the narrow portion; the top member has a top shaft having a shaft portion protruding toward the second member; and a top member attached around the shaft portion. The top has a top, the top is placed in the wide part with no gap between the top and the wall of the wide part, and the top axis is in the narrow part with a space between it and the wall of the narrow part. It is characterized by being located.

According to the present invention having the above configuration, the top always comes into contact with the wall surface of the wide portion, and thereby the top is guided along the groove. Further, when an impact is applied, the top is elastically deformed, the top axis comes into contact with the wall surface of the narrow part, and force is transmitted from the first member to the second member via the top axis. This prevents excessive force from acting on the top and prevents damage to the top. Furthermore, since the top is held by both edges of the narrow portion, it is possible to prevent the top from falling off.

In the lens barrel of the present invention, the lens drive mechanism for driving the lens includes the above-mentioned frame member and groove fitting structure.

According to the present invention, there is provided a fitting structure between a frame member and a groove, and a lens barrel, which can prevent the frame from falling off and prevent the frame from being damaged in the event of an impact, without increasing the size of the lens barrel. I can do it.

FIG. 1 is a perspective view showing a lens barrel at a wide angle according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a lens barrel during telephoto mode according to the first embodiment of the present invention. 2 is a perspective view showing a sliding barrel and a cam barrel of the lens barrel shown in FIG. 1. FIG. 2 is an exploded perspective view showing a sliding barrel and a cam barrel of the lens barrel shown in FIG. 1. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3. FIG. FIG. 7 is a cross-sectional view showing a fitting structure between a piece member and a groove according to a second embodiment of the present invention. FIG. 3 is a cross-sectional view perpendicular to the cam groove, showing a fitting structure between the cam groove and the block member according to the prior art. FIG. 3 is a cross-sectional view (part 1) perpendicular to the cam groove, showing a fitting structure configured such that the top axis comes into contact with the cam groove during impact according to the prior art. FIG. 7 is a cross-sectional view (part 2) perpendicular to the cam groove, showing a fitting structure configured such that the top axis comes into contact with the cam groove at the time of impact according to the prior art.

<First embodiment>
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fitting structure between a frame member and a groove and a lens barrel according to a first embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the optical axis direction of the lens barrel will be referred to as the optical axis direction, and the radial direction perpendicular to the optical axis of the lens barrel will be referred to as the lens barrel radial direction.

First, the overall structure of the lens barrel will be explained.
1 and 2 are perspective views showing a lens barrel according to a first embodiment of the present invention, with FIG. 1 showing a wide-angle state and FIG. 2 showing a telephoto state. 3 and 4 show a sliding barrel and a cam barrel of the lens barrel shown in FIG. 1, with FIG. 3 being a perspective view and FIG. 4 being an exploded perspective view. As shown in FIGS. 1 to 4, the lens barrel 1 includes an outer barrel 2, a linear barrel 4, and a sliding barrel 6 (a sliding barrel 6), which are coaxially nested toward the inside in the barrel radial direction. 1 member) and a cam cylinder 8 (second member). Further, a plurality of lens groups are provided within the lens barrel 1.

The outer cylinder 2 is a cylindrical member, and a mount 2C is provided at the end on the imaging side. A zoom ring 2B is rotatably provided at the tip of the outer surface of the outer cylinder 2, and a focus ring 2A is provided on the imaging side of the zoom ring 2B. A rear lens (lens of the rearmost lens group) is held at the rear end of the outer cylinder 2.

The linear cylinder 4 is provided inside the outer cylinder 2 in the wide-angle state, and is restricted from rotating in the circumferential direction with respect to the outer cylinder 2, and is held movably in the optical axis direction.

The sliding tube 6 is provided inside the linear tube 4 in the wide-angle state, and its rotation in the circumferential direction with respect to the linear tube 4 is restricted, and the optical axis is regulated relative to the linear tube 4 and the cam tube 8. It is held movable in the direction. A front lens (frontmost lens group) 6A is held at the tip of the sliding tube 6. A piece member 10 is provided at the rear end of the sliding barrel 6 and projects inward in the radial direction of the lens barrel.

The cam cylinder 8 is provided inside the sliding cylinder 6 in the wide-angle state, and is rotatable in the circumferential direction with respect to the linear cylinder 4 and the sliding cylinder 6, and is movable together with the linear cylinder 4 in the optical axis direction. is maintained. That is, the cam barrel 8 is movable relative to the sliding barrel 6 in the optical axis direction. The cam cylinder 8 is provided with three cam grooves 20 (first grooves) that are inclined with respect to the optical axis direction.

As shown in FIG. 2, when the zoom ring 2B is rotated, the linear barrel 4 and the cam barrel 8 move toward the subject in the optical axis direction. Further, when the zoom ring 2B is rotated, the rotation is transmitted to the cam barrel 8, and the cam barrel 8 rotates with respect to the linear barrel 4 while moving together with the linear barrel 4. Since rotation of the sliding cylinder 6 in the circumferential direction with respect to the linear cylinder 4 is restricted, the rotation of the cam cylinder 8 guides the piece member 10 along the cam groove 20, and the sliding cylinder 6 is Move in the axial direction.

In the above explanation, regarding the lens group, only the rear lens and front lens were explained, and regarding the cylinder body, only the outer cylinder 2, the linear cylinder 4, the sliding cylinder 6, and the cam cylinder 8 were explained. Other lens groups and other cylindrical bodies are arranged within the lens barrel, and the other lens groups are movable in the optical axis direction in conjunction with the rotation of the zoom ring 2B.

Next, the fitting structure between the piece member and the groove of this embodiment will be explained.
FIG. 5 is a cross-sectional view taken along the line AA in FIG. 3. As shown in FIG. 5, a plurality of protrusions 6A that protrude inward in the lens barrel radial direction are formed on the inner surface of the imaging side end of the sliding barrel 6. It is arranged inward in the lens barrel radial direction with respect to the sliding barrel 6 so that the inner surface of the cam barrel 6A comes into contact with the outer surface of the cam barrel 8. The fitting structure 100 of the present embodiment is configured such that a piece member 10 fixed to the sliding tube 6 is fitted into a cam groove 20 formed in the cam tube 8.

Three through holes 30 are formed at equal intervals in the circumferential direction at the imaging side end of the sliding tube 6. Furthermore, a notch 6B is formed in the inner surface of the sliding tube 6 at the portion where the through hole 30 is formed, and the through hole 30 opens into the notch 6B. The through hole 30 has a circular cross-sectional shape, and includes a large diameter cylindrical hole 30A on the outside in the radial direction of the lens barrel (upper part in FIG. 5), and a small diameter cylindrical hole 30A on the inside of the large diameter hole 30A in the radial direction of the lens barrel. It has a hole 30B. The diameter of the large diameter hole 30A is larger than the diameter of the small diameter hole 30B.

The piece member 10 has a piece screw 12, a piece shaft 14, and a piece 16.
The top screw 12 is a rotating body-shaped member made of metal or resin, and has a circular flat head 12A, a base 12B continuous to the head 12A, and a tip 12C continuous to the base 12B. The base 12B has a cylindrical shape, and the diameter of the base 12B is smaller than the head 12A and approximately equal to the diameter of the small diameter hole 30B of the through hole 30. The tip 12C has a cylindrical shape, and the diameter of the tip 12C is smaller than the diameter of the base 12B.

The piece shaft 14 is a rotating body-shaped member made of a material having higher rigidity (higher elasticity) than the piece 16, such as metal. The spindle 14 includes an annular flange portion 14A and a shaft portion 14G, and the shaft portion 14G has a large diameter portion 14B continuous to the flange portion 14A and a small diameter portion 14C continuous to the large diameter portion 14B. The large diameter portion 14B has a substantially cylindrical shape, and the outer diameter of the large diameter portion 14B is smaller than the outer diameter of the flange portion 14A. Further, the small diameter portion 14C has a substantially cylindrical shape, and the outer diameter of the small diameter portion 14C is smaller than the outer diameter of the large diameter portion 14B and slightly smaller than the width of the narrow portion 20B of the cam groove 20. The lengths of the large diameter portion 14B and the small diameter portion 14C of the frame shaft 14 are such that the tip does not protrude further inward in the lens barrel radial direction than the inner surface of the cam barrel 8 in the attached state. The tip of the small diameter portion 14C of the top shaft 14 terminates at the inner surface of the cam cylinder 8 in the attached state.

Further, a through hole 14D having a circular cross section is formed in the frame shaft 14 and passing through in the axial direction. The through hole 14D includes a large diameter hole portion 14E on the side of the flange portion 14A, and a small diameter hole portion 14F continuous with the large diameter hole portion 14E and on the side of the small diameter portion 14C. The large diameter hole 14E has a cylindrical shape and extends from the flange portion 14A to the middle portion of the large diameter portion 14B. The small diameter hole 14F has a cylindrical shape and extends from the middle part of the large diameter part 14B to the end surface of the small diameter part 14C. The diameter of the small diameter hole 14F is smaller than the diameter of the large diameter hole 14E.

The top 16 is a rotating body-shaped member made of an elastic material such as resin, and has a cylindrical top main body 16A. Further, the piece 16 has a through hole 16D that penetrates in the axial direction (vertical direction in FIG. 5). The top 16 also has an inner edge 16B extending from the radially inward edge of the lens barrel (downward in FIG. 5) of the through hole 16D toward the inside of the top body 16A in the radial direction (horizontal direction in FIG. 5). , an outer edge portion 16C extending from the outer surface of the frame body 16A in the radial direction of the lens barrel (upward direction in FIG. 5) toward the outside in the radial direction (horizontal direction in FIG. 5) of the frame body 16A. The through hole 16D has a large diameter hole 16E on the outer edge 16C side and a small diameter hole 16F continuous with the large diameter hole 16E. The large diameter hole 16E has a cylindrical shape, and the inner diameter of the large diameter hole 16E is approximately equal to the outer diameter of the large diameter portion 14B of the spindle 14. The small diameter hole 16F has a cylindrical shape, and the inner diameter of the small diameter hole 16F is approximately equal to the outer diameter of the small diameter portion 14C of the top shaft 14.

The cam groove 20 extends diagonally with respect to the optical axis direction of the cam barrel 8, and has a wide portion 20A on the outer side in the radial direction of the lens barrel and a narrow portion 20B on the inner side in the radial direction of the lens barrel. The wide portion 20A extends with a constant width, and the width of the wide portion 20A is approximately equal to the diameter of the top body 16A of the top 16. The narrow portion 20B extends with a constant width, and the width of the narrow portion 20B is slightly larger than the outer diameter of the small diameter portion 14C of the top shaft 14.

The top screw 12 is inserted into the through hole 30 of the sliding tube 6 from the outside in the lens barrel radial direction, and the head 12A abuts the bottom of the large diameter hole 30A of the through hole 30, and the base 12B penetrates. It is located within the small diameter hole portion 30B of the hole 30. Further, the frame shaft 14 is arranged at a position where it abuts the through hole 30, with the flange portion 14A abutting the bottom surface (the surface facing inward in the lens barrel radial direction) of the notch portion 6B. The base 12B of the top screw 12 is housed in the large diameter hole 14E of the top screw 14, and the tip 12C of the top screw 12 is located in the small diameter hole 14F. is fixed. In this way, by fixing the piece shaft 14 to the piece screw 12, the head 12A of the piece screw 12 and the flange portion 14A of the piece shaft 14 sandwich the sliding tube 6, and the piece screw 12 and the piece shaft 14 are fixed to the sliding tube. Fixed to 6. Further, the top 16 is arranged such that the large diameter portion 14B and the small diameter portion 14C of the top shaft 14 penetrate into the through hole 16D of the top 16. The inner surface of the large diameter hole 16E of the through hole 16D of the top 16 contacts the outer surface of the large diameter portion 14B of the top shaft 14, and the inner surface of the small diameter hole 16F of the through hole 16D of the top 16 contacts the small diameter portion of the top shaft 14. The top 16 is attached to the top shaft 14 by coming into contact with the outer surface of the top 14C.

The tip of the piece member 10 is located within the cam groove 20 of the cam cylinder 8. The top body 16A of the top member 10 is located within the wide portion 20A of the cam groove 20, and the tip of the small diameter portion 14C of the top shaft 14 is located within the narrow portion 20B. The top body 16A is fitted into the wide portion 20A of the cam groove 20 with no gap between the outer surface of the top body 16A and the wall surface of the wide portion 20A of the cam groove 20. Further, the tip of the small diameter portion 14C of the top shaft 14 is located within the narrow width portion 20B, and a gap is formed between the small diameter portion 14C of the top shaft 14 and the narrow width portion 20B.

According to such a configuration, the top 16 normally comes into contact with the wall surface of the wide portion 20A of the cam groove 20, so that the top 16 is guided along the cam groove 20. When an impact is applied to the sliding barrel 6 of the lens barrel 1 due to a drop or the like, a large force is generated between the sliding barrel 6 and the cam barrel 8. On the other hand, according to the fitting structure 100 of the present embodiment, when a large force is generated between the sliding tube 6 and the cam tube 8, first the wall surface of the wide portion 20A of the cam groove 20 and the shaft portion The piece 16 sandwiched between the outer surfaces of the large diameter portion 14B and the small diameter portion 14C of 14G is elastically deformed. When the piece 16 is elastically deformed, the tip of the small diameter portion 14C of the piece shaft 14 comes into contact with the wall surface of the narrow portion 20B of the cam groove 20. In this way, when the tip of the small diameter portion 14C of the top shaft 14 comes into contact with the wall surface of the narrow portion 20B of the cam groove 20, an impact is transmitted from the top shaft 14 to the cam cylinder 8, so a large force is applied to the top 16. This prevents damage to the top 16.

According to this embodiment, the following effects are achieved.
According to this embodiment, the top 16 is normally in contact with the wall surface of the wide portion 20A of the cam groove 20, and thereby the top 16 is guided along the cam groove 20. Furthermore, when an impact is applied, the piece 16 is elastically deformed and the piece shaft 14 comes into contact with the wall surface of the narrow part 20B, and force is transmitted from the sliding cylinder 6 to the cam cylinder 8 via the piece shaft 14. , no further large force is applied to the top 16, and damage to the top 16 can be prevented. Furthermore, since the top 16 is held by both edges of the narrow portion 20B, the top 16 can be prevented from falling off.

Further, according to the present embodiment, although the cam groove 20 passes through the narrow portion 20B, the top 16 is held by both edges of the narrow portion 20B, so that it is possible to prevent the top 16 from falling off. can.

Further, according to the present embodiment, the sliding tube 6 is arranged outward in the lens barrel radial direction with respect to the cam tube 8, the through hole 30 is formed in the sliding tube 6, and the frame member 10 is slidable. It further has a top screw 12 inserted into the through hole from the outside in the lens barrel radial direction of the moving barrel 6, and the top shaft 14 is arranged inside the sliding barrel 6 in the lens barrel radial direction and is fixed by the top screw 12. . According to such a configuration, the frame shaft 14 can be easily attached to the inside of the sliding barrel 6 in the lens barrel radial direction.

<Second embodiment>
In the first embodiment, a case has been described in which the piece member 10 fits only into the cam groove 20 of the cam cylinder 8, but the present invention is not limited to this, and the piece member fits into the cam groove of the cam cylinder and the fixed cylinder etc. The present invention is also applicable when fitting into both grooves formed in another cylinder. A second embodiment of the present invention will be described below. In the following description, components similar to or corresponding to those in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

FIG. 6 is a sectional view showing a fitting structure between a piece member and a groove according to a second embodiment of the present invention. As shown in FIG. 6, in the fitting structure 200, the frame member 210 provided on the sliding tube 6 (first member) is connected to the guide groove 40 (second groove) of the fixed tube 7 (third member). It is fitted into the cam groove 20 (second member) of the cam cylinder 8 (second member).

In the lens barrel of this embodiment, a fixed barrel 7 is arranged inside the sliding barrel 6 in the radial direction of the lens barrel, and a cam groove 20 is arranged inside the fixed barrel 7 in the radial direction of the lens barrel. A guide groove 40 is formed in the fixed barrel 7 so as to extend in the circumferential direction or the optical axis direction.

In this embodiment, the top body 116A of the top 116 is in the shape of a rotating body, and has a large diameter portion 116G and a small diameter portion 116H. The diameter of the large diameter portion 116G is larger than the diameter of the small diameter portion 116H. Furthermore, a through hole 116D is formed in the piece 116. The through hole 116D includes a small diameter hole portion 116F on the inside in the lens barrel radial direction, and a large diameter hole portion 116E continuing from the small diameter hole portion 116F on the outside in the lens barrel radial direction. The shaft portion 14G of the top shaft 14 is inserted through the through hole 116D of the top 116, the large diameter portion 14B of the shaft portion 14G is in contact with the large diameter hole 116E of the through hole 116D, and the small diameter portion 14C of the shaft portion 14G is inserted into the through hole. The top 116 is attached to the top shaft 14 by coming into contact with the small diameter hole 116F of the top 116D.

In this embodiment, the tip of the piece 116 is inserted through the guide groove 40 of the fixed cylinder 7 and is located within the cam groove 20 of the cam cylinder 8. The large diameter portion 116G of the top 116 is located within the guide groove 40 of the fixed cylinder 7, and the large diameter portion 116G is arranged so that there is no gap between the outer surface of the large diameter portion 116G and the inner wall surface of the guide groove 40. It is fitted into the guide groove 40. Further, the small diameter portion 116H of the piece 116 is located within the wide portion 20A of the cam groove 20 of the cam barrel 8, and the small diameter portion 116H is connected to the inner wall surface between the outer surface of the small diameter portion 116H and the wide portion 20A of the cam groove 20. It is fitted into the wide portion 20A with no gap between them. Further, the tip of the small diameter portion 14C of the top shaft 14 is located within the narrow width portion 20B, and a gap is formed between the small diameter portion 14C of the top shaft 14 and the narrow width portion 20B.

According to such a configuration, the large diameter portion 116G of the top 116 is normally in contact with the wall surface of the guide groove 40 of the fixed barrel 7, and thereby the top 16 is guided along the guide groove 40, and the top 116 is The small diameter portion 116H comes into contact with the wall surface of the cam groove 20 of the cam cylinder 8, and thereby the piece 16 is guided along the cam groove 20. When a shock is applied to the sliding barrel 6 of the lens barrel due to a drop or the like, a large force is generated between the sliding barrel 6 and the cam barrel 8. On the other hand, according to the fitting structure 200 of the present embodiment, when a large force is generated between the sliding tube 6 and the cam tube 8, first the wall surface of the wide portion 20A of the cam groove 20 and the shaft portion 14G The piece 16 sandwiched between the small diameter portion 14C of the fixed cylinder 7 and the outer surfaces of the small diameter portion 14C and the large diameter portion 14B of the shaft portion 14G is elastically deformed. When the piece 16 is elastically deformed, the tip of the small diameter portion 14C of the piece shaft 14 comes into contact with the wall surface of the narrow portion 20B of the cam groove 20. In this way, when the tip of the small diameter portion 14C of the top shaft 14 comes into contact with the wall surface of the narrow portion 20B of the cam groove 20, an impact is transmitted from the top shaft 14 to the cam cylinder 8, so a large force is applied to the top 16. This prevents damage to the top 16.

This embodiment also provides the same effects as the first embodiment.

In addition, in each of the above embodiments, the case where the frame member 10 is provided on the sliding tube 6 has been described, but the present invention is not limited to this, and the present invention can be applied even when the frame member is provided on a lens frame or the like. I can do it.
Further, in each of the above embodiments, when the sliding tube 6 located on the outside in the radial direction of the lens barrel is provided with the frame members 10 and 210, and the cam groove 20 is provided on the cam tube 8 located on the inside in the radial direction of the lens barrel. Although the explanation is given as an example, the present invention is not limited to this, and the present invention can also be applied to a case where a frame member is provided on a member located on the inside in the radial direction of the lens barrel, and a cam groove is provided on a member located on the outside in the radial direction of the lens barrel. I can do it. That is, "one radial side" in the present invention is not limited to the inside in the radial direction of the lens barrel as in this embodiment, but may be the outside in the radial direction of the lens barrel.
Further, the groove into which the piece member fits is not limited to a cam groove, and the present invention can be applied to any groove extending in the circumferential direction.

1 Lens barrel 2 Outer barrel 2A Focus ring 2B Zoom ring 2C Mount 4 Straight barrel 6 Sliding barrel 6A Projection 6B Notch 7 Fixed barrel 8 Cam barrel 10 Column member 12 Coma screw 12A Head 12B Base 12C Tip 14 Column Shaft 14A Flange portion 14B Large diameter portion 14C Small diameter portion 14D Through hole 14E Large diameter hole portion 14F Small diameter hole portion 14G Shaft portion 16 Piece member 16A Top body 16B Inner edge portion 16C Outer edge portion 16D Through hole 16E Large diameter hole portion 16F Small diameter hole portion 20 Cam groove 20A Wide part 20B Narrow part 30 Through hole 30A Large diameter hole 30B Small diameter hole 40 Guide groove 100 Fitting structure 116 Piece member 116A Piece main body 116D Through hole 116E Large diameter hole 116F Small diameter hole 116G Large diameter Part 116H Small diameter part

Claims (5)

a frame member provided on a first member in a lens drive mechanism of a lens barrel, and a second member located on one side in the radial direction with respect to the first member and movable relative to the first member. A fitting structure with a first groove provided in the member,
The first groove is
A narrow part,
a wide portion formed closer to the first member than the narrow portion and wider than the narrow portion;
The frame member is
a top shaft having a shaft portion protruding toward the second member;
an elastic piece attached around the shaft,
The piece is placed in the wide part with no gap between the piece and the wall of the wide part, and the piece axis is placed in the narrow part with a space between it and the wall of the narrow part. The lens mirror is configured such that when an impact is applied to the lens barrel, the frame is elastically deformed and the axis of the frame comes into contact with a wall surface of the narrow portion. The fitting structure between the frame member and the groove in the cylinder. A third member is disposed between the first member and the second member,
the third member has a second groove;
The pieces are arranged in the second groove without any gaps;
The fitting structure of the block member and the groove according to claim 1. the first groove passes through the second member;
The fitting structure of the block member and groove according to claim 1 or 2. The first member is arranged radially outward with respect to the second member,
A through hole is formed in the first member,
The piece member further includes a piece screw inserted into the through hole from the other side in the radial direction of the first member,
The top shaft is arranged on one side in the radial direction of the first member and fixed by the top screw,
A fitting structure between a piece member and a groove according to any one of claims 1 to 3. A lens drive mechanism for driving the lens includes the fitting structure of the frame member and the groove according to any one of claims 1 to 4.
lens barrel.

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