JP2005338415A - Camera lens mirror frame device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera lens mirror frame device which ensures waterproofing of a frame member without increasing component parts and also which can be taken apart and repaired, for example. <P>SOLUTION: This camera lens mirror frame device is composed of a first group frame 3 that is driven forward and backward by the rotation and to-and-fro movement of a cam frame 2, a focus frame 4 that is fixed to the first group frame 3, and a first group lens frame 5 that is driven forward and backward by the focus frame 4. Between the first group frame 3 and the first group lens frame 5, there is arranged a light shielding rubber 15 that is flexible and freely extendable/contractible. The outer circumference of the first group frame 3 is covered with an exterior metallic outer frame 13. In this state, a mounting part 15a of the light shielding rubber 15 is compressedly held between the first group frame 3 and the outer frame 13, which shields the fitted part between the first group frame 3 and the outer frame 13 against the outside to form a waterproof condition. The first group frame 3 and the outer frame 13 are not stuck to each other but mutually held engaged by fixing and press-fitting of a cam follower 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to the structure of a lens barrel device for a camera, and more particularly to a waterproof structure.

  As a conventional lens barrel device having a waterproof function, there is one having a structure in which a metal outer frame is covered on the outer periphery of a lens frame that can be extended. FIG. 8 is a cross-sectional view taken along the optical axis O of a lens barrel device showing an example of a conventional lens barrel device to which the above-described lens barrel having a metal outer frame is applied. FIG. 9 is a cross-sectional view along the optical axis O of the first group frame and the first group lens frame of the conventional lens barrel apparatus.

  The conventional lens barrel device 50 includes a fixed frame 51 fixedly supported on the camera body, a CCD mounting plate 58 fixed to the fixed frame, and a cam frame 52 that is helicoidally coupled to the fixed frame 51 and rotates and advances and retracts. The first group frame 53 that is cam-coupled to the cam frame 52 and moves forward and backward, the first group frame 53 is fixed, the focus frame 54 that incorporates the focus drive unit, and the first group lens 71 are held, The first group lens frame 55 that is driven forward and backward by the focus drive unit, the second group lens 72 that holds the second group lens 72, and is cam-coupled with the cam frame 52, and the ring-shaped guide 57c are fixed. The float key 57 and the optical low-pass filter 73 and the CCD 74 held on the CCD mounting plate 58 are provided.

  The first group frame 53 is covered with a metal outer frame 63 on the outer periphery. A metal outer frame 64 is put on the outer periphery of the cam frame 52. Each of the outer frames 63 and 64 is attached to the first group frame 53 or the cam by an adhesive applied to the adhesion pool portion 53a provided on the outer periphery of the first group frame or the adhesive pool portion 52a provided on the outer periphery of the cam frame. The frame 52 is adhesively fixed.

  Between the first group frame 53 and the relatively moving first group lens frame 55, a flexible light-shielding rubber 65 that also functions as a waterproof is mounted with its end portions fixed to the frame. A waterproof rubber ring 67 is disposed between the fixed frame 51 and the outer periphery of the metal outer frame 64, and a waterproof rubber ring 66 is disposed on the outer periphery of the cam frame 52 and the metal outer frame 63.

  FIG. 10 is a cross-sectional view taken along the optical axis O of the first group frame and the first group lens frame in a lens barrel apparatus showing another conventional example having a metal outer frame.

  The first group frame 81 of this conventional lens barrel apparatus is a frame member that directly holds the first group lens 85. Accordingly, no light shielding rubber is provided on the front surface of the first group frame 81.

  A metal outer frame 83 is also placed on the outer periphery of the first group frame 81. The outer peripheral portion of the first group lens 85 is bonded and fixed to the first group frame 81 by a waterproof adhesive 86. Further, a lens holder 84 is fixed to the front surface of the first group frame 81.

Although what was disclosed by patent document 1 is related with the lens barrel which employ | adopted the structure which covered the metal outer frame on the outer periphery of the lens frame which can be extended as mentioned above, there is no description about a waterproof structure. .
Patent Document 1 is Japanese Patent Application Laid-Open No. 8-271777.

  In the conventional lens barrel device shown in FIGS. 9 and 10, the fitting portions between the metal outer frames 63 and 83 and the first group frames 53 and 81 are applied to the adhesive pool portions 53a and 81a. It cannot be said that it is waterproofed over the entire circumference simply by being bonded by the adhesive, and a slight gap may be partially generated due to unevenness of the adhesive or the roundness of the frame member. Therefore, there is a problem that water that has entered from the front side of the metal outer frames 63 and 83 reaches the inside of the lens frame through the gap.

  The present invention has been made to solve the above-described problems, and provides a lens barrel device for a camera that can reliably waterproof a frame member without increasing the number of components, and can be disassembled and repaired. The purpose is to do.

  According to a first aspect of the present invention, there is provided a lens barrel device for a camera, a holding frame, a movable frame supported in the holding frame and movable in the optical axis direction of the photographing optical system, and a front surface portion of the holding frame. One end portion for being fixedly held to the moving frame and the other end portion for being fixedly held by the moving frame, and can be expanded and contracted according to the movement of the moving frame in the optical axis direction, and from the outside An elastic member formed so as to be able to shield dust and water, a plurality of protrusions provided on the outer periphery of the holding frame, and a cylindrical cover so as to cover the front and outer peripheral surfaces of the holding frame In order to cover the cap member to be assembled from the front side of the holding frame along the optical axis direction, and to fix and hold the cap member to be incorporated in the optical axis direction and the circumferential direction, Formed on the cap member and engaged with the plurality of protrusions A plurality of engaging portions provided on the elastic member, and the one end portion of the elastic member is fixed so as to be sandwiched between the front surface portion of the holding frame and the cap member. .

  The camera lens barrel apparatus according to claim 2 of the present invention is the camera lens barrel apparatus according to claim 1, wherein the projection is a cam of a cam member for driving the holding frame in the optical axis direction. It also serves as a cam follower that engages the part.

  The camera lens barrel apparatus according to claim 3 of the present invention is the camera lens barrel apparatus according to claim 1, wherein the elastic member is elastic rubber.

  The camera lens barrel apparatus according to claim 4 of the present invention is the camera lens barrel apparatus according to claim 1, wherein the elastic member has a front surface of the one end portion and a front surface of the cap member and the holding frame. It is fixed and held so as to be sandwiched between the two parts.

  The camera lens barrel apparatus according to claim 5 of the present invention is the camera lens barrel apparatus according to claim 4, wherein a protrusion is formed on the entire front surface of one end of the elastic member. The ridge portion is pressed and displaced by the cap member.

  The camera lens barrel apparatus according to claim 6 of the present invention is the camera lens barrel apparatus according to claim 5, wherein the cap is provided at a plurality of locations in the circumferential direction on the front surface of the one end portion of the elastic member. A second protrusion is formed that contacts the member and is deformable in the optical axis direction.

    According to a seventh aspect of the present invention, there is provided a lens barrel device for a camera, a holding frame, an elastic member disposed on the entire front surface of the holding frame, and a plurality of protrusions provided on the outer periphery of the holding frame. And a cap member that is formed in a cylindrical shape so as to cover the front surface portion and the outer peripheral surface of the holding frame, and is incorporated so as to be covered along the optical axis direction from the front surface side of the holding frame, In order to fix and hold the cap member to be incorporated in the optical axis direction and the circumferential direction, a plurality of engaging portions formed on the cap member and provided to engage with the plurality of protruding portions. The cap member is in contact with the elastic member disposed on the holding frame so as to be pressed and deformed, and is easily fixed to the holding frame in a detachable manner.

  The camera lens barrel apparatus according to claim 8 of the present invention is the camera lens barrel apparatus according to claim 7, wherein the protrusion is a cam of a cam member for driving the holding frame in the optical axis direction. It also serves as a cam follower that engages the part.

  The camera lens barrel apparatus according to claim 9 of the present invention is the camera lens barrel apparatus according to claim 7, wherein the elastic member is elastic rubber.

  The camera lens barrel device according to claim 10 of the present invention is the camera lens barrel device according to claim 7, wherein the elastic member has a front surface between the cap member and the front portion of the holding frame. It is fixed and held so as to be sandwiched.

  The lens barrel apparatus for a camera according to claim 11 of the present invention is the lens barrel apparatus for a camera according to claim 7, wherein a protrusion is formed on the entire front surface of the elastic member. The protrusion is pressed and displaced by the cap member.

  A camera lens barrel apparatus according to a twelfth aspect of the present invention is the camera lens barrel apparatus according to the seventh aspect, wherein the cap member and the cap lens are disposed at a plurality of locations in the circumferential direction on the front surface of the elastic member. A second ridge portion that is in contact with and is deformable in the optical axis direction is formed.

  According to the present invention, it is possible to provide a lens barrel device for a camera that can reliably perform waterproofing and drip-proofing of a frame member without increasing the number of components, and further can be disassembled and repaired.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view taken through the optical axis of the lens barrel device of the camera of the first embodiment of the present invention. FIG. 2 is an exploded perspective view around the first group frame portion of the lens barrel apparatus. FIG. 3 is a longitudinal sectional view through the optical axis of the first group frame and the first group lens frame of the lens barrel apparatus. 4 is a view taken in the direction of arrow A in FIG. FIG. 5 is an enlarged view of a portion B in FIG. 6 is a view taken in the direction of arrow C in FIG.
The lens optical axis of the photographing optical system in the lens barrel device of the present embodiment is the optical axis O. The direction parallel to the optical axis O is the Z direction, the subject side is the + Z side (front), The following description will be given with the image side as the -Z side (backward).

  A lens barrel device 10 of a camera according to a first embodiment of the present invention is fixed to a fixed frame 1 fixedly supported by a camera body (not shown) as shown in FIGS. A CCD mounting plate 8, a cam frame 2 that is helicoidally coupled to the fixed frame 1 and rotated and moved back and forth, and a first group frame 3 that is cam-coupled to the cam frame 2 and moved forward and backward; A focus frame 4 fixed to the first group frame 3 and incorporating a focus drive unit; a first group lens frame 5 that is a moving frame that holds the first group lens 21 and is supported by the focus frame 4 so as to be able to advance and retreat; The second group lens frame 6 that holds the second group lens 22 and is driven forward and backward by being cam-coupled to the cam frame 2, the float key 7, the optical low-pass filter 23 and the CCD 24 that are held by the CCD mounting plate 8, , Arranged between the first group frame 3 and the first group lens frame 5 A light shielding rubber 15 is an elastic member that comprises a waterproof rubber ring 16, 17 with fins is an elastic member that is disposed between the frame of the lens frame member.

  The cam frame 2 is an annular frame member, and a metal outer frame 14 is put on the outer peripheral portion. The cam frame 2 includes a rotary drive gear portion 2a on the outer periphery of the rear end portion, a helicoid screw portion 2e that is screwed with a helicoid screw on the fixed frame side, and three protrusions on the front side of the rear end portion. A mating protrusion 2d is provided, and cam grooves 2b and 2c which are cam portions that are inclined with respect to the direction of the optical axis O are provided on the inner peripheral portion. When the cam frame 2 is rotationally driven via the gear portion 2a by a long gear of a zoom drive portion (not shown), the cam frame 2 is driven forward and backward in the direction of the optical axis O while being rotated by the helicoid screw 2e.

  A rubber ring 16 is bonded and fixed to the inner periphery of the tip of the cam frame 2. The front end portion 16 a that is a protrusion and a protrusion of the rubber ring 16 is disposed so as to protrude from the front end portion of the cam frame 2.

  The outer frame 14 is a cap member that forms a metal cylindrical exterior portion having an opening, and three engagement holes (engagement portions) 14a are provided on the rear outer peripheral portion. The outer frame 14 is fitted to the outer peripheral portion of the cam frame 2 and is engaged in a waterproof connection by engaging with an engagement hole. The waterproof connection structure will be described later.

  The float key 7 has a ring shape, and is provided with a protrusion 7a in the outer peripheral direction and a straight guide portion 7b extending forward in parallel with the optical axis O. Further, a ring-shaped guide 7 c is fixed to the front side with screws 19. The ring-shaped guide 7 c is slidably fitted into a circumferential groove provided in the inner peripheral portion of the cam frame 2. Further, the rectilinear guide portion 7 b is slidably fitted into a rectilinear guide groove in the optical axis O direction provided on the inner peripheral portion of the fixed frame 1. Therefore, when the cam frame 2 moves forward and backward while rotating, the float key 7 moves forward and backward in the optical axis O direction together with the cam frame 2 while being restricted in rotation with respect to the fixed frame 1.

  The first group frame 3 is an annular frame member, and a metal outer frame 13 is put on the outer peripheral portion. The focus frame 4 is fixed to the first group frame 3 by screws 18 through which the screw insertion holes 3b are inserted. A fitting escape portion 3c for fitting the outer frame 13 is provided on the outer peripheral portion, and a step portion 3d is provided on the front surface portion. A cam follower 11, which is a protrusion, is press-fitted and fixed to the pin hole 3 a on the outer periphery of the rear end portion of the first group frame 3. The cam follower 11 is slidably fitted into the cam groove 2 b of the cam frame 2. Further, the front end portion of the straight guide portion 7b of the float key 7 is slidably fitted into the focus frame 4 fixed to the first group frame 3. Therefore, when the cam frame 2 moves forward and backward while rotating, the first group frame 3 moves forward and backward in the optical axis O direction by the cam groove 2b in a rotation restricted state.

  The outer frame 13 is a cap member that forms a metal cylindrical exterior portion having an opening, and has three projecting portions 13a projecting rearward as shown in FIG. 4, and the cam follower 11 is formed in the projecting portion. Slots 13b, which are three engaging portions through which are inserted, are provided. The outer frame 13 is fitted to the outer peripheral portion of the first group frame 3 with the mounting portion 15a of the light shielding rubber 15 sandwiched between the step portion 3d of the first group frame 3 and the engaging portion. , And the waterproof connection structure will be described later.

  The first lens group frame 5 is a moving frame member that holds the first lens group 21 and is supported by the focus frame 4 so as to be movable back and forth in the optical axis O direction, and is driven forward and backward by a focus driving unit built in the focus frame during focusing. Is done. The first group lens 21 is held after being bonded and fixed at the central opening of the first group lens frame 5 and further waterproofed for waterproofing. A light shielding rubber 15, which will be described later, is disposed on the front surfaces of the first group frame 3 and the first group lens frame 5.

  The light shielding rubber 15 is made of elastic rubber, and is flexible at the both ends to connect the first group frame mounting portion 15a which is a ring-shaped one end, the holding frame mounting portion 15b which is the other end, and the mounting portions 15a and 15b. Part 15c. The attachment portion 15a is provided with a fin portion 15e that is a flexible protrusion portion over the entire circumference and a protrusion portion 15d that is another protrusion portion protruding forward in three circumferential directions. The light shielding rubber 15 is sandwiched between the step portion 3d of the first group frame 3 and the outer frame 13 in a state where the projection portion 15d on the mounting portion 15a side is compressed, and the fin portion 15e is in close contact with the inner surface of the outer frame 13. Furthermore, it is supported between the 1st group frame 3 and the 1st group lens frame 5 in the state which adhered the attaching part 15b side to the 1st group lens frame 5 on the front outer periphery. A flexible portion 15c of a light shielding rubber 15 is interposed between the first group frame 3 and the first group lens frame 5 that move relative to each other, and is sealed in a waterproof, dustproof, and light shielding state.

  The second group lens frame 6 is a frame member that holds the second group lens 22, and a cam follower 12 that fits into the cam groove 2 c of the cam frame 2 is fixed to the outer peripheral portion. This second group lens frame 6 is supported by being guided straight by a straight guide portion 7 b of the float key 7. When the cam frame 2 is driven to rotate and advance / retreat during zoom driving, the second lens group frame 6 moves forward / backward in the direction of the optical axis O by the cam groove 2c in a rotation restricted state.

Next, a waterproof joint structure between the first group frame 3 and the outer frame 13 will be described with reference to FIGS.
The outer frame 13 is fitted and joined to the outer periphery of the first group frame 3 with the mounting portion 15a of the light shielding rubber 15 attached to the step portion 3d in front of the first group frame 3, but in the fitted state, A protrusion 15 d provided on the attachment portion 15 a of the light shielding rubber 15 is compressed in the Z direction by the step 3 d in front of the first group frame 3 and the inner surface of the front wall of the outer frame 13. In this state, the cam follower 11 is inserted from the elongated hole 13b of the outer frame 13, and is press-fitted and fixed to the pin hole 3a of the first group frame 3. The outer frame 13 is pressed and urged in the + Z direction by the compressive force of the projecting portion 15d of the light shielding rubber 15, and the outer diameter portion 11a of the cam follower 11 is in contact with the end portion of the elongated hole 13b of the outer frame 13. The first group frame 3 is fixed and held in the Z direction with a predetermined holding force. At the same time, the fin portion 15e of the light shielding rubber 15 is deformed and adhered along the inner surface of the front wall of the outer frame 13. A slight gap remains between the inner surface of the front wall of the outer frame 13 and the front end surface of the first group frame 3, and the outer frame 13 is slightly smaller than the first group frame 3 as described later. Pressing displacement is possible in the direction of the optical axis O by the gap.

  Accordingly, the fitting portion between the inner periphery of the outer frame 13 and the outer periphery of the first group frame 3 is shielded from the outside by the fin portion 15e, and a completely waterproof state (including drip-proof) is obtained. Further, the gap between the outer peripheral portion of the outer frame 13 and the inner peripheral portion of the cam frame 2 is also outside because the fin portion of the rubber ring 16 attached to the cam frame 2 is in sliding contact with the lens barrel device 10 in the assembled state. On the other hand, it is kept waterproof.

  Furthermore, since the first group frame 3 and the outer frame 13 are not bonded and fixed, disassembly after assembly is possible. That is, to remove the outer frame 13 from the first group frame 3, if the cam follower 11 that is press-fitted while pushing the outer frame 13 in the −Z direction with respect to the first group frame 13 is extracted from the first group frame 3, The outer frame 13 can be removed from the first group frame 3.

Next, a waterproof joint structure between the cam frame 2 and the outer frame 14 will be described with reference to FIGS.
The outer frame 14 is fitted and joined to the outer periphery of the cam frame 2 in a state where the rubber ring 16 is bonded and fixed to the inner periphery of the tip end portion of the cam frame 2, and in this inserted state, the rubber frame 16 projects forward. The distal end portion 16a is pressed by the inner surface of the front wall of the outer frame 14 and compressed in the Z direction, and the distal end portion 16a and the inner surface of the front wall of the outer frame 14 are in close contact with each other. In this state, the engagement protrusion 2d on the outer peripheral portion of the cam frame 2 is engaged with the engagement hole 14a of the outer frame 14 (FIGS. 5 and 6). Since the outer frame 14 is pressed and urged in the + Z direction by the compression force of the rubber ring 16, the engagement protrusion 2 d abuts on the rear end of the engagement hole 14 a and is held in the Z direction with respect to the cam frame 2. It will be fixed and supported by force.

  Accordingly, the fitting portion between the inner periphery of the outer frame 14 and the outer periphery of the cam frame 2 is shielded from the outside by the tip end portion 16a of the rubber ring 16, and is securely held in a waterproof state (including drip-proof). On the other hand, the gap between the outer peripheral portion of the outer frame 14 and the inner peripheral portion of the fixed frame 1 is also in contact with the outside because the fin portion of the rubber ring 17 attached to the fixed frame 1 is in sliding contact with the lens barrel device 10 in the assembled state. And kept waterproof.

  Since the cam frame 2 and the outer frame 14 are not bonded and fixed, they can be disassembled even after assembly. That is, in order to remove the outer frame 14 from the cam frame 2, the outer frame 14 can be removed by engaging the engagement hole 14 a with the engagement protrusion 2 d of the cam frame 2 while pressing the outer frame 14 in the −Z direction. Can be removed from the cam frame 2.

  According to the lens barrel device 10 of the present embodiment described above, the fitting gap between the first group frame 3 and the outer frame 13 and the waterproofing of the fitting gap between the cam frame 2 and the outer frame 14 are originally waterproof. The light shielding rubber 15 and the rubber ring 16 are provided for the purpose. That is, the projection 15d and the fin 15e of the light shielding rubber 15 and the tip 16a of the rubber ring 16 are pressed against and in close contact with each other in the direction of the optical axis O between the respective frames and shielded from the outside (a reliable waterproof state ( Including dustproof). Thus, waterproofing between the frame members in the fitting relationship can be reliably performed without increasing the number of components.

  The first group frame 3 and the outer frame 13 once assembled, and the cam frame 2 and the outer frame 14 are not bonded and fixed to each other, so that they can be disassembled as necessary, which is advantageous for repair. is there. Furthermore, when the lens barrel device 10 is dropped, the projection 15d of the light shielding rubber 15 inside the outer frame 13 acts as a buffer material that receives an impact force due to the drop.

Next, a lens barrel apparatus according to a second embodiment of the present invention will be described.
FIG. 7 is a longitudinal sectional view passing through the optical axis O of the first group frame constituting the lens barrel apparatus of the present embodiment.

  In the lens barrel device of the present embodiment, as shown in FIG. 7, the first group lens frame is not directly driven by focusing and is directly held by the first group frame 33, and the structure of that portion is the first embodiment. This is different from the lens barrel device 10 of the embodiment. Therefore, this lens barrel apparatus is not provided with the light shielding rubber 15 applied to the first embodiment. In this lens barrel apparatus, in order to waterproof the fitting portion between the first group frame 33 that is a holding frame and the outer frame 35 that is a cap member of a metal exterior covering the outer periphery thereof, A waterproof rubber 36, which is an elastic member, is disposed between the step portion 33 c on the front surface of the group frame 33 and the inner surface of the front wall of the outer frame 35 instead of the attachment portion 15 a of the light shielding rubber 15.

  The waterproof rubber 36 has a ring shape formed of elastic rubber, and is a fin portion 36c that is a flexible ridge portion over the entire circumference and other ridge portions that protrude forward in three circumferential directions. And a protrusion 36b.

  The waterproof joint structure between the first group frame 33 and the outer frame 35 will be described. The outer frame 35 is attached to the outer periphery of the first group frame 33 in a state where the waterproof rubber 36 is attached to the step portion 33d in front of the first group frame 33. The projection 36b of the waterproof rubber 36 is compressed in the Z direction by the step 33d in front of the first group frame 33 and the inner surface of the front wall of the outer frame 35 in the fitted state. In this state, the cam follower 34 is inserted from the elongated hole 35 a that is the engaging portion of the outer frame 35 and is press-fitted and fixed to the pin hole of the first group frame 33. The outer frame 35 is pressed and urged in the + Z direction by the compressive force of the protrusion 36 b of the waterproof rubber 36, and the outer diameter portion 34 a of the cam follower 34 contacts the end of the elongated hole 35 a of the outer frame 35, The frame 33 is fixed and held in the Z direction with a predetermined holding force. At the same time, the fin portion 36 c of the waterproof rubber 36 is deformed along the inner surface of the front wall of the outer frame 35 and is in close contact therewith. Also in this case, the fitting of the first group frame 33 and the outer frame 35 is not bonded, and the outer frame 35 can be detached from the first group frame 33.

  Therefore, the fitting portion between the inner periphery of the outer frame 35 and the outer periphery of the first group frame 33 is shielded from the outside by the fin portion 36c, and a completely waterproof state (including drip-proof) is obtained.

  The first group lens 21 is bonded and fixed to the first group frame 33, and further, waterproof adhesion is performed on the outer periphery of the first group lens 21 by a waterproof adhesive 38. A decorative ring 37 is fixed to the front surface of the outer periphery of the lens of the first group frame 33.

  The lens barrel device of the present embodiment also has the same effects as the lens barrel device 10 of the first embodiment.

  The outer frame 35 is fixed to the first group frame 33 by press-fitting and fixing a cam follower to the first group frame 33. However, if the frame member is a frame that does not require a cam follower, it is replaced with a cam follower. It is also possible to apply a press-fitting pin dedicated to locking.

  The lens barrel apparatus for a camera according to the present invention can be used as a lens barrel apparatus for a camera that can reliably waterproof a frame member without increasing the number of components and can be disassembled and repaired.

It is a longitudinal cross-sectional view which passes along the optical axis of the lens barrel device of the camera of the first embodiment of the present invention. It is a disassembled perspective view around the 1st group frame part of the lens barrel apparatus of FIG. It is a longitudinal section which passes along the optical axis of the 1st group frame of a lens barrel device, and the 1st group lens frame. It is A arrow directional view of FIG. It is the B section enlarged view of FIG. It is C arrow line view of FIG. It is a longitudinal cross-sectional view which passes along the optical axis of the 1st group frame applied to the lens barrel apparatus of 2nd embodiment of this invention. It is a longitudinal cross-sectional view which passes along the optical axis of the conventional lens barrel device. It is a longitudinal cross-sectional view which passes along the optical axis of the 1st group frame of the conventional lens barrel apparatus of FIG. 8, and a 1st group lens frame. It is a longitudinal cross-sectional view which passes along the optical axis of the 1st group frame applied to the other conventional lens barrel apparatus.

Explanation of symbols

2 ... Cam frame (holding frame, cam member)
2b ... Cam groove (cam part)
2d: engagement protrusion (protrusion)
3,33
... First group frame (holding frame)
5 ... First lens group frame (moving frame)
11, 34
... Cam followers (protrusions)
13, 14, 35
... Outer frame (cap member)
13b, 35a
... Long hole (engagement part)
14a ... engagement hole (engagement part)
15 ... Light shielding rubber (elastic member)
15a ... Mounting portion (one end of the elastic member)
15b ... Mounting portion (the other end of the elastic member)
15d ... Projection (other ridges)
15e ... Fin (ridge)
16
... Rubber ring (elastic member)
16a ... tip (ridge)
36 ... Waterproof rubber (elastic member)
36b ... Projection (other ridges)
36c ... Fin part (ridge part)

Agent Patent Attorney Susumu Ito

Claims (12)

A holding frame;
A movable frame supported in the holding frame and movable in the optical axis direction of the photographing optical system;
One end for fixing and holding to the front surface of the holding frame and the other end for fixing and holding to the moving frame, and extendable according to movement of the moving frame in the optical axis direction And an elastic member formed to shield dust and water from the outside,
A plurality of protrusions provided on the outer periphery of the holding frame;
A cap member that is formed in a cylindrical shape so as to cover the front surface portion and the outer peripheral surface of the holding frame, and is assembled so as to be covered along the optical axis direction from the front surface portion side of the holding frame;
In order to fix and hold the cap member to be incorporated in the optical axis direction and the circumferential direction, a plurality of engaging portions formed on the cap member and provided to engage with the plurality of protruding portions. When,
Comprising
The lens lens frame device for a camera, wherein the one end portion of the elastic member is fixed so as to be sandwiched between the front surface portion of the holding frame and the cap member.   2. The lens lens frame device for a camera according to claim 1, wherein the protruding portion also serves as a cam follower that engages with a cam portion of a cam member for driving the holding frame in the optical axis direction.   2. The lens barrel apparatus for a camera according to claim 1, wherein the elastic member is an elastic rubber.   2. The lens barrel of a camera according to claim 1, wherein the elastic member is fixedly held so that a front surface of the one end portion is sandwiched between the cap member and a front surface portion of the holding frame. apparatus.   5. A camera lens mirror according to claim 4, wherein a ridge is formed on the entire front surface of one end of the elastic member, and the ridge is pressed and displaced by the cap member. Frame device.   Furthermore, the other protrusion part which can contact | abut with the said cap member and can deform | transform into an optical axis direction is formed in the circumferential location in the front surface of the one end part of the said elastic member. 6. A lens barrel device for a camera according to 5. A holding frame;
An elastic member disposed on the entire front surface of the holding frame;
A plurality of protrusions provided on the outer periphery of the holding frame;
A cap member that is formed in a cylindrical shape so as to cover the front surface portion and the outer peripheral surface of the holding frame, and is incorporated so as to be covered along the optical axis direction from the front surface portion side of the holding frame;
In order to fix and hold the cap member to be incorporated in the optical axis direction and the circumferential direction, a plurality of engaging portions formed on the cap member and provided to engage with the plurality of protruding portions. When,
And the cap member is in contact with the elastic member disposed on the holding frame so as to be pressed and deformed, and is easily detachably fixed to the holding frame. Camera lens frame device.   8. The lens barrel device for a camera according to claim 7, wherein the protrusion also serves as a cam follower that engages with a cam portion of a cam member for driving the holding frame in the optical axis direction.   8. The lens barrel device for a camera according to claim 7, wherein the elastic member is an elastic rubber.   8. The lens barrel apparatus for a camera according to claim 7, wherein the elastic member is fixed and held such that a front surface is sandwiched between the cap member and a front surface portion of the holding frame.   8. The lens barrel device for a camera according to claim 7, wherein a ridge portion is formed on the entire front surface of the elastic member, and the ridge portion is pressed and displaced by the cap member.   Furthermore, the other protrusion part which contact | abutted with the said cap member and can be deform | transformed in an optical axis direction is formed in the several places of the circumferential direction in the front surface of the said elastic member. Camera lens frame device.

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