JPH09222648A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a dimension in a horizontal direction (the direction of feeding a film) smaller by making a spool chamber wall composed of a lens barrel constituting member. SOLUTION: The spool chamber wall 1a of a camera main body consists of the lens barrel constituting member for constituting a lens barrel, to make the dimension in the horizontal direction smaller than that in a conventional camera in which both of the spool chamber wall and the lens barrel constituting member are arranged side by side. Further, for preventing rays of light from being leaked in a spool chamber 2 from an aperture 1c through a film feeding path, when an exposure for photographing is over, a light shielding rib 1e projected into the spool chamber 2 is provided. On the side on the spool chamber 2 of the rib 1e, enough space for the roller part and roller supporting part of a main body side roller spring 8 to enter and further, a roller to rotate is formed. Thus, in the case a photographic optical axis and the spool chamber are close to each other, an inner rail is extended even a little, so that the leakage of the rays of light in the spool chamber 2 from the aperture can be prevented, while the flatness of the film 9 can be secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a spool chamber provided with a spool for winding a photographic film.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 4-3 is one of the cameras described above.
As proposed in Japanese Patent Publication No. 49443, etc., there is a camera body in which a wall portion surrounding a spool chamber is formed and a film is pressed against the spool by a roller spring attached to the wall portion. .

FIG. 4 schematically shows a conventional spool chamber, where 1 is a camera body, 1a is a spool chamber wall formed in the camera body 1, and 1b is a part of the spool chamber wall 1a. This is a groove portion for press-fitting and holding the roller spring 8.

Reference numeral 2 is a spool chamber for winding and storing a photographic film. Reference numeral 3 is a winding spool disposed in the spool chamber 2. The spool 3 is rotationally driven by a film feeding means (not shown) at the time of winding the film, and is in an idling state at the time of rewinding.

Reference numeral 5 denotes a back cover which covers the aperture portion 1c formed in the camera body and the spool chamber 2 in a light-tight manner, and 4 denotes a back cover side roller attached to the back cover 5 for pressing the photographic film onto the spool 3. It is a spring.

Reference numeral 6 denotes a fixed barrel which constitutes the outermost peripheral portion of the taking lens barrel, and 7 denotes a taking barrel unit housed inside the fixed barrel 6. Reference numeral 8 denotes a main body side roller spring for pressing the photographing film 9 against the spool 3. At the time of assembly, the main body side roller spring 8 is inserted into the spool chamber 2 from the direction of the back cover, and the groove portion 1 provided in the camera main body 1 is inserted.
Press into b.

Reference numeral 1d is an inner rail which is integrally formed with the camera body 1 and which regulates the position of the photographic film 9 in the optical axis direction in the film feed path formed between the camera body 1 and the back cover 5. is there.

Next, the movement of the photographic film in this camera will be described. The film 9 sent out from the film cartridge by the film feeding means (not shown) passes through the film feeding path and enters the spool chamber 2. When the film 9 is further fed out, the leading end of the film 9 contacts the back lid side roller spring 4 and is pressed by the spool 3. Therefore, when the spool 3 rotates in the winding direction (clockwise direction in FIG. 4), the film 9 starts to wind around the spool 3 due to the friction generated by the pressing force.

When the film 9 is further fed, the film 9 is guided between the wall surface of the spool chamber 2 and the main body roller spring 8 and is sandwiched between the main body roller spring 8 and the spool 3 as shown in FIG. , And then wound up on the spool 3. When the film 9 is wound up on the spool 3 up to the maximum frame, the body side roller spring 8 is elastically deformed to the position indicated by 8a in FIG.

In the camera shown in FIG. 4, the main body side roller spring 8 is provided, but as shown in FIG. 5, some cameras do not have the main body side roller spring 8.

In FIG. 5, reference numeral 10 indicates that the photographic film 9 that is about to enter the spool chamber 2 is prevented from falling between the spool 3 and the wall of the spool chamber on the lens barrel side, or the exposure amount at the time of photographing exceeds. The ribs are provided so as to project into the spool chamber in order to prevent light rays from entering the spool chamber 2 from the aperture portion and to improve the flatness of the film in the aperture portion.

[0012]

However, in the camera shown in FIGS. 4 and 5, a part of the camera body (spool chamber wall 1a on the lens barrel side) and a part of the taking lens barrel (fixed barrel) on the front surface of the camera. 6) and 6) are arranged side by side in the left-right direction, there is a problem that the size of the camera in the left-right direction increases.

Further, as shown in FIG. 4, when the molding die is removed in the direction of the back lid to mold the camera main body, the main body side roller spring 8 is press-fitted only at a position overlapping the spool chamber wall 1a in the left-right direction. The groove 1b cannot be formed, which also hinders downsizing of the camera in the left-right direction.

Further, as shown in FIG. 5, when the molding die is removed in the direction of the back lid to mold the camera body, it is extremely difficult to mold the rib 10 protruding into the spool chamber integrally with the camera body. Is. For this reason, the rib 10 must be molded separately from the camera body 1, and the ribs 10 must be joined together during assembly, leading to a problem of increased cost.

Even if a slide type is used, since a step due to a sliding key groove or partition is generated on the inner surface of the spool chamber 20 along which the film moves, the film is caught in the step and the film feeding is hindered. There will be problems such as

When the rib 10 as shown in FIG. 5 is to be integrally formed with the camera body 1 in the example shown in FIG. 4, even if it is possible to form the rib 10 by the method shown in FIG. It becomes extremely difficult to incorporate the body side roller spring 8 into the camera body 1. Moreover, in order to miniaturize the camera,
The closer the main body side roller spring 8 is to the lens barrel side wall surface 1a,
It becomes difficult to assemble the main body side roller spring 8. Therefore, in reality, the rib 10 has to be molded as a separate component from the camera body 1.

Therefore, a first object of the present invention is to provide a camera in which the structure around the lens barrel is simplified and the size of the camera can be reduced.

A second object of the present invention is to provide a camera which can be easily assembled.

[0019]

In order to achieve the above object, the first invention of the present application has a taking lens barrel and a camera main body in which a spool chamber having a film winding spool is formed. In the camera, at least a part of the wall surrounding the spool chamber (spool chamber wall) is formed by the lens barrel constituting member that constitutes the lens barrel.

That is, by making the lens barrel constituting member also serve as a part of the spool chamber wall, the size in the left-right direction (film feeding direction) is made smaller than that of the conventional camera in which both of them are arranged side by side. . When the lens barrel has a fixed barrel that accommodates the moving mechanism of the taking lens inside and is attached to the camera body, it is desirable to use the fixed barrel as the lens barrel constituting member.

Further, in the second aspect of the present invention, in the camera having the pressing means for pressing the film against the spool in the spool chamber, the pressing means is attached to the lens barrel constituting member.

That is, the lateral dimension of the camera is further reduced by bringing the pressing means closer to the spool chamber wall side than the conventional one. Further, the lens barrel constituting member to which the pressing means is previously attached by a method such as press-fitting is assembled to the camera body to facilitate the assembly.

A retracting portion is formed in the lens barrel forming member so as to allow the pushing means to move, and the pushing means can enter the retracting portion when the film is wound on the spool so that the pushing means moves. In order to secure the range, it is desirable to prevent the spool chamber width, that is, the lateral dimension of the camera from increasing.

Further, the pressing means may be sandwiched between the lens barrel constituting member and the camera body to which the lens barrel constituting member is assembled.

In the third invention of the present application, the camera body is provided with the guide portion which projects into the spool chamber and guides the film to the spool.

Specifically, the guide portion is integrally formed with a rail portion that faces the aperture opening and regulates the position of the film in the optical axis direction, or is formed in a rib shape near the end portion of the aperture opening in the film feeding direction. As a result, the assembling work is simplified as compared with the case where a guide component formed separately from the camera body is attached to the camera body.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a camera which is a first embodiment of the present invention. In this figure, the same components as those shown in FIG.

In the fixed barrel 6 which is a part of the photographing lens barrel, a spool chamber wall surface portion 6a forming a part of a wall surface surrounding the spool chamber 2 and a press-fit groove portion 6b for press-fitting the main body side roller spring 8 are provided. Is provided.

It is sufficient for the wall surface portion 6a to have a thickness sufficient to form a female helicoid for mounting the lens barrel on the lens side thereof. Therefore, the outer diameter of the fixed barrel 6 may be small, and by using the peripheral wall of the fixed barrel 6 as the wall surface portion 6a of the spool chamber, the lateral dimension of the camera can be minimized.

Reference numeral 1a in FIG. 1 denotes a light shielding wall provided in the camera body 1 in order to prevent light rays from directly entering the spool chamber 2 between the fixed barrel 6 and the aperture 1c. In the camera configured as described above, the position of the main body side roller spring 8 when the photographic film 9 is wound around the spool shaft 3 by the total number of frames is as shown by a dotted line 8a in the drawing, as shown by a dotted line 8a. It will be close to you. At this position, the spring portion of the main body side roller spring 8 is shaped so as to be pushed into the fixed cylinder b side from the light shielding wall 1a.

That is, in this embodiment, the camera body 1
Not only partially removed the spool chamber wall of, but also the space created by the removal, the main body side roller spring 8
Is effectively utilized as a refuge space for

1e is an aperture 1c when the exposure for photographing is exceeded.
This is a light-shielding rib that protrudes into the spool chamber 2 in order to prevent light rays from leaking into the spool chamber 2 through the film feeding path. On the spool chamber 2 side of the rib 1e, the roller portion of the main body side roller spring 8 and the roller support portion are inserted, and a space is formed in which the roller can rotate.

Reference numeral 1f is an inner rail extension portion in which an inner rail 1d for restricting the position of the film 9 on the optical axis front side in the film feeding path is projected into the spool chamber 2.

When the photographing optical axis and the spool chamber 2 are close to each other as in the present embodiment, the inner rail is extended as much as possible to secure the flatness of the film 9 and the spool chamber from the aperture portion. 2 can be prevented from leaking into the light. Further, since the inner rail extension portion 1f projects into the spool chamber 2, the film 9 is not fed from the film feeding path between the back lid side roller spring 4 and the spool 3 at the beginning of feeding the film. Also, the film feeding does not fail because it falls between the main body side roller spring 8 and the light shielding wall 1a due to the film curling.

FIG. 2 shows the camera of this embodiment as viewed from the back side. The ribs 1e and the inner rail extension portions 1f are provided symmetrically in the vertical direction and reach the upper and lower surfaces of the spool chamber 2, thereby strengthening the structure around the spool chamber 2 in the main body 1.

Further, since the main body side roller spring 8 is incorporated into the camera main body 1 while being pressed into the groove portion 6b of the fixed barrel 6 which is a part of the photographing lens barrel unit, even if the light shielding rib 1e and the extension inner rail 1f are provided. Does not pose a problem in assembling even if it projects into the spool chamber.

(Second Embodiment) FIG. 3 shows a camera according to a second embodiment of the present invention. In this figure, 1g
Is a gap for holding the body side roller spring 8 formed by the camera body 1 and the fixed barrel 6. This gap 1
After the fixed cylinder 6 is assembled into the camera body 1, the main body side roller spring 8 is press-fitted into g and incorporated therein.

In this embodiment, since the side wall surface of the barrel of the spool chamber 2 is formed by the fixed barrel 6, the same effect as that of the first embodiment can be obtained.

In each of the above embodiments, the case where the main body side roller spring 8 is attached by press fitting has been described, but in the present invention, any means that can be fixed such as screwing and caulking may be used.

Further, in the present embodiment, the rib 1e and the inner rail extension 1f are formed so as to fill the vertical width of the spool chamber 2 and have a vertically symmetrical shape and project into the spool chamber 2. Then, it is partial, it is vertically asymmetrical shape, only above, only below, only in the middle, or
Even if there are a plurality of or different shapes, it is sufficient that they protrude into the spool chamber 2.

The present invention can be applied to various forms of cameras such as a single-lens reflex camera, a lens shutter camera, and the like, and further, an optical device other than the camera and other devices, and further these cameras and optical devices. It can also be applied to devices applied to other devices or elements constituting them.

Further, the present invention may be used by combining the above-described embodiments and modified examples, or their technical elements as needed.

(Relationship Between Embodiment and Claims) In the above embodiment, the spool chamber 2 is in the spool chamber described in the claims, the spool 3 is in the film winding spool described in the claims, and the fixed barrel 6 is provided. Corresponds to the lens barrel constituting member, the main body side roller spring 8 corresponds to the pressing means described in the claims, and the inner rail extension 1f and the rib 1e correspond to the guide portions described in the claims.

The above is the correspondence relationship between each configuration of the present invention and each configuration of the embodiment, but the present invention is not limited to the configurations of these embodiments, and the mechanism or the embodiment described in the claims is not limited thereto. Any structure may be used as long as the function of the structure can be achieved.

[0045]

As described above, in the first invention of the present application, at least a part of the spool chamber wall is formed by the lens barrel constituting member. Therefore, when the present invention is used, the size in the left-right direction (the film feeding direction) can be made smaller than that of a conventional camera in which the spool chamber wall that is a part of the camera body and the lens barrel constituting member are arranged side by side. You can

According to the second aspect of the present invention, in the camera having the pressing means for pressing the film against the spool in the spool chamber, the pressing means is attached to the lens barrel constituting member. Therefore, according to the present invention, the pressing means can be brought closer to the spool chamber wall side than the conventional one, and the lateral dimension of the camera can be further reduced. Furthermore, since the lens barrel constituting member to which the pressing means is previously attached by a method such as press fitting can be assembled to the camera body, the assembling can be facilitated.

If a retracting portion for allowing the movement of the pressing means is formed in the lens barrel constituting member so that the pressing means can enter the retracting portion when the film is wound on the spool, It is possible to prevent the width of the spool chamber, that is, the dimension of the camera in the left-right direction, from increasing in order to secure the movement range.

In the third invention of the present application, the camera body is provided with a guide portion which projects into the spool chamber and guides the film to the spool. Therefore, according to the present invention, the assembling work can be simplified as compared with the case where the guide component formed separately from the camera body is attached to the camera body.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a camera that is a first embodiment of the present invention.

FIG. 2 is a sectional perspective view of the camera.

FIG. 3 is a cross-sectional view of a camera that is a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a conventional camera.

FIG. 5 is a cross-sectional view of a conventional camera without a body roller spring.

[Explanation of symbols]

 1 ... Camera body 1a ... Spool chamber wall 1b ... Press-fit groove 1c ... Aperture opening 1d ... Inner rail 1e ... Light shielding rib 1f ... Inner rail extension 1g ... Gap 2 ... Spool surface 3 ... Spool 4 ... Back lid side roller spring 5 ... Back cover 6 ... Fixed cylinder 6a ... Spool chamber wall surface portion 6b ... Press-fit groove 7 ... Imaging lens barrel unit 8 ... Main body side roller spring 8a ... Main body roller spring retreat position 9 ... Film 10 ... Rib

Claims (9)

[Claims] 1. A camera having a camera body in which a spool chamber having a film winding spool is formed and a taking lens barrel, wherein at least a part of a wall surrounding the spool chamber is provided with the taking lens barrel. A camera which is formed of a lens barrel constituting member. 2. The photographing lens barrel has a fixed barrel which accommodates a moving mechanism of the photographing lens inside and is attached to the camera body, and the lens barrel constituting member is the fixed barrel. The camera according to claim 1, wherein the camera is a camera. 3. The spool chamber is provided with a pressing unit for pressing the film against the spool, and the pressing unit is attached to the lens barrel constituting member. The camera described in. 4. The camera according to claim 3, wherein the pressing means is press-fitted into a recess formed in the lens barrel constituting member. 5. The camera according to claim 3, wherein the pressing means is sandwiched between the lens barrel constituting member and the camera body. 6. The camera according to claim 3, wherein the lens barrel constituting member is formed with a retracting portion that allows the pressing means to move. 7. The camera according to claim 1, wherein the camera body is provided with a guide portion that projects into the spool chamber and guides the film to the spool. 8. A rail portion for limiting the position of the film in the optical axis direction facing the aperture opening is formed in the camera body, and the guide portion is formed to be connected to the rail portion. The camera according to claim 7, wherein the camera is a camera. 9. The camera according to claim 7, wherein the guide portion is formed in a rib shape in the vicinity of an end portion of the aperture opening of the camera body in the film feeding direction.