JP3261622B2 - Camera with counter mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a simple structure such as a film unit with a lens which has an exposure and film winding function and can immediately take a picture of a previously loaded unexposed film. Manufactured at cost
Related to a camera having a counter function .

[0002]

2. Description of the Related Art A film unit with a lens is a so-called film-integrated camera having a photographing function, which is also referred to as a "clear camera". Since the camera body is used only for photographing the film and the exposed body of the camera is discarded after taking out the film, the camera body is manufactured with a simple structure at a low cost.

[0003] Cameras are often purchased and used on the go when traveling or the like. However, it is hard to say that the camera is convenient to carry.
Approximately 35 mm in size, it was inconvenient because it did not fit in the breast pocket of the shirt.

[0004]

However, despite the fact that it is called a "camera clearly", the camera functions have been advanced as in the case of a lens-equipped film unit with a built-in strobe light emitting device due to the recent diversification of shooting purposes. There is a tendency to increase costs and increase the size of cameras.

[0005] Further, from the viewpoint of reusing resources, it has been demanded to make a camera that can be used clearly, that is, a Lew's camera, into a reusable camera.

Therefore, in order to satisfy these demands, the mechanism as a camera must be as simple and inexpensive as possible and have a high reliability. Then, camera film counter mechanism that appears odor number value each is necessary that the display is changed each time performing the winding with the single frame shooting, the display should not be incorrect. In addition, the shutter charge must be correctly performed, and the photographing operation must be correctly performed. Therefore, the film counter mechanism is more only a easy without being dependability signal is deteriorated, the but also shooting operation causes no trouble been accurately is desired.

[0007] The present invention results an improvement to resolve points of this like, suppresses an increase in cost by utilization of simplification and space of the camera mechanism, with full Irumukaunta mechanism and the taking lens reliable operation film Simple structure such as unit
Counter mechanism that is manufactured at low cost
It is intended to provide a camera equipped with the camera .

[0008]

An object of the present invention is to provide an index plate integrally formed with an index gear, a sprocket, and a gear portion, a cam portion, and a fitting shaft which are engaged with the index plate gear in order from the tip. And a sprocket mounting portion. The cam member is rotatably supported so as to rotate integrally with the sprocket by fitting the fitting shaft portion of the cam member into a shaft hole of a camera body. Each time a frame is wound, the sprocket is rotated by the film, and a counter mechanism configured to rotate the index wheel by a predetermined angle by the gear portion of the cam member is provided. A camera body having a diameter of the panel larger than a diameter of the index wheel and the index wheel is provided on a lower surface of the index panel, and the counter mechanism is mounted.
The cam portion contacts the side surface of the cam shaft of the cam member.
Pressing in the direction in which the gear part of the material and the index plate gear mesh
And a regulating portion for regulating the position of the gear portion of the cam member.
A camera equipped with a counter mechanism characterized by providing a member, an index plate in which an index plate gear is integrally formed, a sprocket, a gear portion meshing with the index plate gear in order from a tip end, a cam portion. A cam shaft having a fitting shaft portion and a sprocket mounting portion, the cam member being supported so as to rotate integrally with the sprocket by fitting the fitting shaft portion of the cam member into a shaft hole of a camera body. , each time the film is wound by one frame, the sprocket is rotated by the film, in a camera having a counter mechanism which is adapted to a predetermined angular rotation of the index plate gear by said gear part of said cam member, the exponent Release Indicates the diameter of the index plate
While making it larger than the diameter of the number plate gear,
Provided on the lower surface of the index plate, the diameter of the index plate and the index plate
The space under the index panel caused by the difference in gear diameter
Forming a circumferential groove into which the tip of the cam member fits;
The tip of the cam member is connected to the groove of the index plate.
So as to rotatably support the cam member.
This is achieved by a camera provided with a counter mechanism.

[0009]

FIG. 1 shows a turtle having a counter mechanism according to the present invention.
For example, it shows the appearance of a film unit with a lens (hereinafter also referred to as the present camera).
mm film (J135) is loaded, and after filming, the film is sent to the maker side without being rewound, and is taken out of the camera without being rewound. Printing is performed.

An unexposed film used in the camera is loaded in a state of being wound on a spool, and is wound up in a patrone by winding every time a photograph is taken.
Therefore, on the maker side, the photographed film can be taken out of the camera in the light room.

It is possible to easily take out the photographed film by bending a part of the back cover. Therefore, the camera portion is checked, a new unexposed film is loaded, and the back cover is replaced. It can be used.

The patrone loaded into the camera is a patrone having an outer diameter of φ20.6 mm, which is different from a patrone (JIS K7528) generally used.

As a result, the thickness of the camera can be suppressed to about 24 mm except for the lens barrel having the photographing lens, thereby realizing an ultra-thin compact camera.

The camera is provided with a cardboard carton (paper cover) on which a product name and a simple usage method are displayed on a part of the outer surface thereof.

FIG. 2 is a developed view showing the configuration of the camera.

Reference numerals 10, 20, and 30 denote a camera body, a front cover, and a back cover, respectively, which are main components of the camera. Reference numeral 40 denotes a built-in flash unit.
Reference numerals 60 and 70 denote film winding, sector charge and film counter mechanisms, respectively.

When the camera body 10 is used alone, the film winding mechanism 50, the sector charging mechanism 60, and the members constituting the film counter mechanism 70 are mounted, and a shutter case 11 for accommodating a sector is mounted.

The shutter case 11 is fixed by engaging claws 11A protruding on both sides with a locking portion 10A on the front surface of the camera body 10, and connects the sector to the sector charging mechanism 60.

Further, on the front surface of the shutter case 11, a photographing lens 12 having a focal length f = 30 mm, a single lens having an aperture of F9.5 and having an aperture of F9.5 is provided, and a slide 13A which engages with a guide pin 11B is provided. Covered by the lens holder 13.

The camera body 10 and the shutter case 11 described above.
Is molded from a black matte plastic material having some elasticity, including the front cover 20 and the back cover 30 described above.

On the other hand, the strobe unit 40 is mounted and supported with reference to holes 40A and 40B on the board which are engaged with guide pins 10B and 10C on the front of the camera body 10, respectively.

The strobe unit 40 is composed of AA batteries serving as a strobe charging power source by projecting the upper and lower battery contact pieces 41 to be integrated into the upper and lower slits 10D of the camera body 10 and projecting into the battery chamber on the back of the camera body 10. A certain power supply battery E is sandwiched.

The integrated main capacitor C is stored in a capacitor chamber formed below the shutter case 11.

The lens holder 13 and the strobe unit 40
Is fixedly integrated with the camera body 10 by mounting the front cover 20 on the camera body 10.

Prior to mounting the front cover 20 on the camera body 10, the objective lens 21 of the finder is dropped on the front surface thereof in advance and fixed by the engagement of the decorative cover 22. The makeup cover 22 has a guide pin 22A and four claws 22B on the back.
, Which are respectively engaged with holes 20A on the front face of the front cover 20 and four locking portions 20B to be attached.

The front cover 20 is further mounted on the front surface of the camera body 10 after engaging and mounting an eyepiece 23 of a finder on the rear surface.

The front cover 20 has a hole 20C, a claw 20D, and three locking portions 20E on its rear surface, and a guide pin 10E, a claw 10F, and a locking portion 10G on the front surface of the camera body 10, respectively. Engage and attach.

The engagement of the front cover 20 with the camera body 10 causes the lens holder 13 and the strobe unit 40 to be fixed to the camera body 10.

The camera body 10 with the front cover 20 attached
The cartridge P1 and the spool S2 with the leading end of the unexposed film F are respectively loaded into a patrone chamber and a scroll chamber (both not shown) formed on the back surface thereof.

The other end of the film F is locked on a spool S1 in a patrone P1, and even if the film in the patrone is once wound up by a spool S2 after the film is loaded, the other end is locked on the spool S1. Therefore, it can be wound into the patrone P1 every time the photographing is completed.

A back cover 30 is attached to the back of the camera body 10 loaded with the film F, so that the light shielding of the film F and the restriction on the focus surface position are maintained.

The back cover 30 has claws 30A and 30B on its front surface and locking holes 30C and 30D on its side surface.
The claw 30A and 30B are the locking parts of the camera body 10
Holes 30C and 30D on the other hand are 10H and 10J,
K and 10L are engaged and fixed.

After the back cover 30 is mounted, a predetermined film winding operation is performed to set a photographable screen, and the carton shown in FIG. 1 is mounted to complete the screen.

Next, the details of the film winding mechanism 50, the sector charging mechanism 60, and the film counter mechanism 70 will be described.

FIG. 3 shows each of the above-mentioned mechanisms at an angle as viewed from the back side of the camera, and FIG. 4 shows the patrone and the spool in which the film is wrapped, as viewed from the direction in which the spool is inserted into the camera body. It is a thing.

The camera body 10 has a patrone chamber 15 as two storage chambers for film winding and film loading in the same plane on both sides of a screen frame 16 as an exposure unit.
A and a scroll chamber 15B are provided, and J135 is caught in a patrone P1 which is a storage container shown in FIG.
The film F is to be loaded.

The film F used in the camera of the present embodiment is a roll film J135 or a slightly thin roll film of 130 to 140 μm, like a general camera, and a spool of the cartridge P1 in a dark room or the like in advance using a cartridge as a storage container. The end portion is fixed to S1, and a predetermined number of frames are wrapped in a length that can be photographed, and a film of a certain length comes out from the film drawer of the cartridge P1. The film in this state is loaded into the camera. The loading method will be described below.

The patrone P1 is loaded into the patrone chamber 15A such that the spool S1 of the patrone P1 engages with the fork of the hoisting fork 52. On the other hand, the spool S2 is also inserted into the scroll chamber 15B. Then, in the present embodiment, the film F is pulled out until the tip of the film notch FN of the film F matches the index 17A at the lower portion of the lower rail surface.
The leading end of the film F is inserted into the slit SL of the spool S2 to lock the perforations P of the film F with the claws H. The film notch FN has a number of holes provided in the tongue portion at the leading end of the film to indicate the emulsion lot number and the like of the film.

Next, the back cover 30 is put on the cover to make the cover light-tight.
Then, the camera in this state is mounted on the film winding device, and the entire film F (with the other end not being detached from the spool S1 of the cartridge P1) is moved to the scroll chamber 15B.
And the loading of the film is completed. That is, by loading the film F in this manner, the film F is sequentially wound into the patrone P1 for each photographing, and after the photographing of a predetermined number of frames is completed, in the present embodiment, two frames are skipped. And film F
The photographed film is wrapped in the patrone P1, leaving the required length without being caught in the patrone. Therefore, this patrone can be taken out of the camera in a bright room.

Next, the mechanism of the main body will be described.

In the camera body 10, a film winding mechanism 50 including a photographing lens 12, a sector charging mechanism 60,
The main mechanism of the film counter mechanism 70 is incorporated therein.

First, the film winding mechanism and the sector charging mechanism will be described.

Reference numeral 51 denotes a film winding knob. The film F loaded as described above is wound by turning the film winding knob 51 counterclockwise. A cam 55 coaxial with an eight-tooth sprocket gear 54 meshing with the perforation P of the film F and having a fan-shaped cam portion 55B at the bottom.
Is rotated exactly one turn in the counterclockwise direction by winding the film.

That is, the film is wound up with the length of eight perforations, which is the number of teeth of the sprocket gear, as one frame, and the frame size is a so-called full size frame size of 24 × 36 mm.

The rotation of the cam 55 in the counterclockwise direction naturally rotates the sector cam portion 55B in the counterclockwise direction as described above, and in the process, the charge lever is moved by the sector cam portion 55B.
61 rotates clockwise against the spring force of a charge lever spring 64 that urges the charge lever shaft 63 counterclockwise about the charge lever shaft 63, and the sector is formed by a triangular ketobashi 61C provided on the charge lever 61. The rising portion 65B of the lever 65 is depressed, and eventually gets over the rising portion 65B to charge the sector charging mechanism as shown in the figure.

The pin 65C of the sector lever 65 and the camera body 10
A sector spring 67 is stretched between the pins 18C provided on the sector lever 67.
The left end of the long hole is brought into contact with a pin 18B provided on the camera body 10 that guides the long hole slidably and rotatably, and the sector lever
The arm 65D provided on the camera body 10 is provided with a pin 18 provided on the camera body 10.
It comes into contact with E. A sector drive pin 65A for operating a sector 66 pivotally supported by a sector pin 18D provided on the camera body 10 is inserted into the fork of the sector 66.

As will be described later, the cam stopper after photographing is completed
The protrusion 62D of 62 is pulled out from the groove 55A of the cam 55,
The arm portion 57A of the hoisting stopper 57 changes from the state shown in the figure to change the arm portion 61A of the charge lever 61 and the arm portion of the cam stopper 62.
It comes off from each edge of 62A, and is in contact with the end face of the arm 61A by the spring force of the hoisting stopper spring 58 that urges clockwise. When the cam 55 rotates just once by the film winding as described above and the groove 55A of the cam 55 returns to the initial position, the spring force for urging the cam stopper 62 by the horizontal end of the charge lever spring 64 in the clockwise direction. As a result, the projection 62D of the cam stopper 62 jumps into the groove 55A. By this jumping operation, the locking of the arm portion 57A of the hoisting stopper 57, which has been locked on the end surface of the arm portion 62A of the cam stopper 62 at this time, is released.

The outer peripheral cylindrical surface of the film winding knob 51 is a ratchet gear, and the V-shaped projection at the tip of the winding stopper 57 is released by the release of the engagement, so that the ratchet gear is driven by the spring force of the winding stopper spring 58. This jumps into the tooth groove of the gear 51A, thereby preventing the film winding knob 51 from rotating in the counterclockwise direction. That is, upon completion of film winding, the film winding knob 51 is prevented from rotating further.

In the camera body 10, the tip of a reverse rotation preventing claw 53 utilizing the elasticity of a resin material is pressed against the ratchet gear 51A so as to prevent the film winding knob 51 from rotating in the opposite direction of winding. It has become.

When the release button 25 of the front cover 20 is pressed, a release button pin 25A implanted on the back of the release button 25
Operates in the direction of arrow A. That is, the front cover 20
When the camera is attached to the camera body 10,
By the operation of the tip of the release button pin 25A in the direction of arrow A described above, the hoisting stopper 57 rotates counterclockwise against the spring force of the hoisting stopper spring 58. Then, the arm portion of the charge lever 61 is moved from the end surface of the arm portion 57A of the hoisting stopper 57.
The edge of 61A is disengaged, and the charge lever 61, and thus the cam stopper 62, is rotated counterclockwise by the spring force of the charge lever spring 64.

The counterclockwise rotation of the charge lever 61 by the spring force of the charge lever spring 64 stronger than the sector spring 67 causes the charge lever 61 to rotate.
C hits the rising portion 65B of the sector lever 65 and comes off the rising portion 65B. Therefore, the sector lever 65 rotates clockwise around the pin 18B in the long groove of the sector lever against the tensile force of the sector spring 67, and
It returns to its original state due to the tensile force. Therefore, the sector drive pin 65A
Turns the sector 66 around the sector pin 18D and closes after giving the film exposure.

On the other hand, the cam stopper 62 also rotates in the counterclockwise direction together with the charge lever 61 as described above.
The projection 62D of 62 comes out of the groove 55A of the cam 55. Therefore, even if you stop pressing the release button,
The arm 57A of the charge lever 61 is urged clockwise by the spring force of the hoisting stopper spring 58.
The V-shaped projection at the end of the hoisting stopper 57 does not lock the ratchet gear 51A of the hoisting knob 51. Therefore, the next film winding can be performed.

Next, the film counter mechanism will be described.

As described above, 72 engages with the V groove 56A of the gear provided at the upper end of the cam shaft 56 implanted in the cam 55 which rotates integrally with the sprocket gear 54, and the film 1
This is an index gear that rotates clockwise by one tooth each time the cam shaft 56 is rotated by one rotation of the frame.

On the upper surface of the index plate gear 72, an index plate 71 is printed as an integrally molded product, and the remaining number of shootable films is displayed from the film counter window 26 on the upper surface of the front cover 20.

FIG. 5A is a perspective view of the cam member 155, which has a cam shaft 56, a cam 55, and a sector cam portion 55B whose mechanism has been described earlier, and is fitted coaxially. Joint shaft 55C,
Furthermore, the tip of the sprocket mounting section has a two-way cross section.
It is a resin molded member having 55D. Cam member 155
Is inserted into the camera body 10 and fitted with the fitting shaft portion 55C, and further, the sprocket gear 54 is fitted to the sprocket mounting portion 55D at the tip.
Is fixed.

FIG. 5B is a plan view of the periphery of the index plate gear 72 and the cam member 155 of the film counter mechanism viewed from the upper surface side, and FIG. 5C is a side view thereof. FIG.
In (b), the triangular teeth 72C of the index plate gear 72 below the index plate 71 have a V groove 56A of the gear at the tip of a cam shaft 56 coaxial with the sprocket gear 54 fixed to one end of the cam member 155, as shown in FIG. Are engaged. The sprocket gear 54
When the film F is wound, the film F moves and rotates the sprocket gear 54 in the counterclockwise direction, and as described above, the V groove of the gear at the tip of the cam shaft 56 coaxial with the sprocket gear 54.
An index wheel 72 meshing with 56A, and thus an index plate 71
Will rotate clockwise. Further, the cam 55 provided on the cam member 155 is moved from the initial position by one rotation due to the rotation of the sprocket gear 54 coaxially attached with the movement of the film.
When rotated, the protrusion 62D of the cam stopper 62 jumps into the groove 55A of the cam 55. Also cam member 15
The fan-shaped cam portion 55B provided at 5 performs an operation of pushing up the charge lever 61 during the rotation in the counterclockwise direction. This operation is as described above.

The cam member 155 that performs multifunctional operations is fitted and rotated by the fitting shaft 55C with the camera body 10, but the fitting length is not sufficient, and it is difficult to expect good fitting accuracy. When the cam member 155 is tilted while rotating, the index plate 71 is not correctly rotated to one frame and the display becomes inaccurate. Also, while the charge lever 61 is pushed up by the sector cam portion 55B, the cam member 155 When tilted, the push-up becomes insufficient and an accident occurs in which the shutter charge is not performed.

The present invention prevents the cam member 155 from tilting,
In which correct operation is to be performed, the tip of the cam shaft 56 is provided a conical projection 56B, also in the index plate 71,
As shown in FIGS. 5 (b) and 5 (C), the diameter of the index plate 71 is
The diameter of the index plate gear 72 should be larger than the diameter of the
Provided on the lower surface, the difference between the diameter of the index plate 71 and the diameter of the index plate gear 72
A circumferential groove 72E centering on the center of rotation of the index plate 71 is provided in the lower surface space of the index plate 71, and the projection 56B is always in the groove 72E. In the embodiment, the conical projection 56B is provided at the tip of the camshaft 56. However, the tip of the camshaft 56 is made hemispherical or flat, and has a shape matching the cross-sectional shape of the circumferential groove 72E. Desirably. Also, the camshaft 56
As shown in FIG. 5, the portion from the cam 55 side to the tip is
The cam shaft 56 is used, but the cam 55 side to reinforce the shaft strength
It is desirable to provide a base having a slightly larger shaft diameter.
Also the camera body have arms 10P is provided which operates as a spring plate of elastic, the side of the cam shaft 56 of the cam member 155
Surface (cam shaft base side surface) so as to press it from the side opposite to the contact position of the charge lever 61, and the tip of the cam member is
Regulates the position so that it does not tilt, meshes with the index wheel 72
And the amount of contact with the charge lever 61 is kept constant.

With the above arrangement, the cam member 155 is regulated, so that the cam member 155 makes a miso-sliding motion while the cam member 155 is rotating, so that the display of the index plate 71 becomes inaccurate and the shutter charge is not performed. In order to prevent such accidents, all operations have been performed stably.

Returning to FIG. 3, a projection 72A is provided on the lower surface of the index platen gear 72, and after the predetermined number of frames have been photographed, the projection 72A is charged by the next film winding.
The protrusion 61E of the cam 61 and the other protrusion 62E of the cam stopper 62 break into the protrusion 61E. And the protruding part 72A
Enters between the projecting portions 61E and 62E, the film is wound up by one frame, and even when the cam 55 rotates once and the sector charging is completed, the projecting portions 61E and 62E project the indexing gear 72. Since the movement is prevented by the portion 72A, the charge lever 61 cannot be operated, and the protrusion 62D of the cam stopper 62 cannot jump into the groove 55A of the cam 55. And
A hoisting stopper spring 58 is provided on the end face of the arm 62A of the cam stopper 62.
The arm portion 57A of the hoisting stopper 57 abuts due to the above-mentioned spring force, the V-shaped protrusion at the tip of the hoisting stopper 57 does not lock the ratchet gear 51A, and the charge lever 61 is operated to open and close the sector. Nor can it give the film exposure.

As described above, in this embodiment, when two frames of film are fed, the index plate gear 72 rotates by two teeth, and the rotation causes the protrusion 72A of the index plate gear 72 to rotate.
The charging lever 61 is
Movement of the cam stopper 62, but another projection 62E of the cam stopper 62.
It comes out of the. Therefore, the protrusion 62D jumps into the groove 55A of the cam 55, the locking of the hoisting stopper 57 is released, and the hoisting knob 57 is locked by the hoisting stopper 57.
The film can no longer be wound. Since the movement of the charge lever 61 is blocked as described above, the film cannot be exposed. In this way, the tongue at the leading end of the film is prevented from being caught in the cartridge, and the tongue of the required length is secured. Therefore, in order to make the camera compact, there is no problem in drawing out the film from the patrone at the time of development even if a patrone having a small outer diameter is used.

[0063]

Effect of the Invention] The present invention, therefore to prevent the inclination of the cam member by an extremely simple structure, and improve the reliability of the film counter mechanism, a shutter operation, a counter mechanism which stably operates without increase in cost Equipped camera will be provided.

[Brief description of the drawings]

FIG. 1 is an external view of a film unit with a lens according to the present invention.

FIG. 2 is a development view showing a configuration of a film unit with a lens according to the present invention.

FIG. 3 is a perspective view of mechanisms such as a camera body and a front cover of the lens-fitted film unit according to the present invention as viewed from the rear side.

FIG. 4 is a perspective view of a film used for a film unit with a lens according to the present invention.

FIG. 5A is a perspective view of a cam member made according to the present invention, and FIG. 5B is an enlarged view around the cam member and the index plate.
(C), (b) is a view seen from the top side, (c) is a side view thereof.

[Explanation of symbols]

 10 Camera body 10P Arm 54 Sprocket gear 55 Cam 55B Fan-shaped cam 55C Fitting shaft 55D Sprocket mounting 56 Cam shaft 56A V-groove 56B Projection 61 Charge lever 62 Cam stopper 62D Projection 71 Index plate 72 Index disk gear 72C Triangular teeth 72E Groove 155 Cam member F film

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 17/00 G03B 17/02 G03C 3/00 575

Claims (2)

(57) [Claims] 1. An index plate in which an index plate gear is integrally formed, a sprocket, and a gear portion, a cam portion, a fitting shaft portion, and a sprocket mounting portion that are sequentially meshed with the index plate gear from a tip end portion. The cam member is supported so as to rotate integrally with the sprocket by fitting the fitting shaft portion of the cam member into a shaft hole of a camera body, and each time a film is wound up by one frame, the film Wherein the sprocket rotates and the indexing wheel rotates a predetermined angle by the gear portion of the cam member. while larger than the diameter provided with the index plate gear to a lower surface of the index plate, the counter mechanism preparative
The camera body attached to the cam shaft side of the cam member
The gear portion of the cam member and the index disk
Pressing in the direction in which the car meshes, the gear portion of the cam member
A camera equipped with a counter mechanism, wherein a regulating member for regulating a position is provided . 2. An index plate in which an index plate gear is integrally formed, a sprocket, and a gear portion, a cam portion, a fitting shaft portion, and a sprocket mounting portion that are sequentially engaged with the index plate gear from a tip end portion. The cam member is supported so as to rotate integrally with the sprocket by fitting the fitting shaft portion of the cam member into a shaft hole of a camera body, and each time a film is wound up by one frame, the film The sprocket rotates, the camera equipped with a counter mechanism that causes the index plate gear to rotate a predetermined angle by the gear portion of the cam member, wherein the index plate has a diameter of the index plate.
The index plate gear is made larger than the diameter of the index plate gear and
A gear is provided on the lower surface of the index plate, and the diameter of the index plate and the
Lower surface of the exponential dial caused by the difference in the diameter of the dial
A circumferential groove into which the tip of the cam member fits.
Forming the tip of the cam member in front of the index plate.
The cam member is rotatably supported by being fitted into the groove.
Camera equipped with a counter mechanism, characterized in that the the like.