JPH0728154A - Camera - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost, facilitate inspection works, and accomplish a camera with no risk of accident occurrence and of a high quality by eliminating any coupling bend which is otherwise provided to couple a bulkhead with the front wall of a spool chamber, using the corresponding part to a hole opened in the facade of the camera, and also forming a light shutting member by molding in a single piece with the bulkhead. CONSTITUTION:A camera concerned has a camera body 14 which has a bulkhead 14a partitioning a spool chamber from a lens barrel accommodation chamber, and a coupling part to couple this bulkhead 14a with the front wall part 14b of the spool chamber is segregated at least near the camera central part in vertical direction, and a hole 14d is formed equipped with a certain specified width. A projection 14c for light shutting is formed by molding in a single piece with the bulkhead 14a. Use of a die of such a structure allows eliminating the fabrication cost for light shutting member and the parts management costs and also allows omission of the affixing works for members otherwise required, so that the efficiency of the camera assembly process is enhanced and the manufacturing cost reduced. In the camera assembly process, the installed condition of a spring-fitted roller 3 can be checked from the front of the camera.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a still camera,
In particular, it relates to a camera having an improved structure around the film winding spool chamber.

[0002]

2. Description of the Related Art The structure of the main part of a conventionally known non-interchangeable lens type camera will be described with reference to FIGS.

In FIG. 4, hatched portions are first camera bodies 1 and 6 which are manufactured by plastic molding or die casting, and guide the lens barrel 7 to extend and retract along the optical axis. Together with a front plate fixed to the front side of the first camera body 1, 9 is an exterior member of the camera front side, 10 is a second camera body forming a side portion of the spool chamber R, and 11 is a rear portion of the camera. The exterior member 4, a film winding spool housed in the spool chamber R, 3 a roller with a spring for pressing the film against the outer peripheral surface of the spool 4, and 5 also pressing the film against the outer peripheral surface of the spool 4. Is a spring for. In addition, 2 is a roller 3 with a spring that leaks light from the aperture.
Is a light-shielding member for preventing it from being reflected on the roller surface and being transferred onto the film, and the arrangement of the member 2 is shown in FIG.

The first camera body 1 has a partition wall 1a for partitioning the spool chamber R and the lens barrel accommodating chamber 8, a spool chamber front wall 1b on the front side of the spool chamber R, the partition wall 1a and the spool. A bending connecting portion 1c that forms a recess 1d for connecting the chamber front wall portion 1b and press-fitting the base end bending portion 3b of the spring 3a of the spring-loaded roller 3; A recess 1e for mounting the light shielding member 2 is formed in the center of the rear end of the la 1a.

The first camera body 1 is formed by integrally molding a partition wall portion 1a, a spool chamber front wall portion 1b, and a bending connecting portion 1c. As shown in FIG. A cavity C formed between the die 13 and the die 13 is filled with a plastic material or the like and melt-molded, and then the two dies 12 and 13 are moved backward in the direction of the arrow shown in the drawing to be released. Since the light shielding member 2 cannot be integrally molded with the camera body 1 due to the mold structure and the die cutting direction in the molding process, in the conventional camera structure, the light shielding member 2 is manually attached to the concave portion 1e with an adhesive. It was pasted with.

[0006]

The conventional camera structure described above has the following drawbacks.

(I) Since the light-shielding member 2 must be manually attached to the recess 1e, the distance a between the shaft center of the spool 4 and the partition wall portion 1a is set to facilitate the work such as securing the attachment surface. It had to be designed larger than necessary. Therefore, this is one of the factors that hinder the miniaturization of the camera.

Further, since the light-shielding member 2 is manually attached, the assembling efficiency of the camera is poor, and the manufacturing cost of the member 2 and the parts management cost are high, which is a factor that hinders the reduction of the manufacturing cost of the camera.

(Ii) Bending portion 3 of spring of roller 3 with spring
At the final stage of the assembling process in which the lens barrel 7 is assembled after press-fitting b into the recess 1d of the camera body 1, it is not possible to inspect whether the spring-loaded roller 3 is correctly positioned. This is because the concave portion 1d of the camera body 1 is closed toward the front side of the camera, so that it is not possible to observe the state of the roller with spring 3 from the front side of the camera.

Therefore, conventionally, it is not possible to inspect at the end of the camera assembly process whether or not the spring-loaded roller 3 is installed in a normal state and is held in a normal attitude, so the spring-loaded roller 3 is installed in a normal attitude. There is a risk of being shipped in the unloaded state, and the autoloading failure was caused by the spring-loaded roller 3 slipping out of the recess 1d or tilting from its normal posture.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional camera structure, to reduce the manufacturing cost as compared with the conventional camera, and to provide a high-quality camera which does not cause the accident described above. is there.

[0012]

In order to eliminate the above-mentioned drawbacks of the prior art, (a) the work of attaching the light shielding member 2 is eliminated and the member 2 can be integrally molded with the camera body 1.

(B) It is necessary to have means for solving the problem such that the mounting state of the spring-loaded roller 3 can be visually checked from the front side of the camera when the lens barrel is assembled.

The present inventor has devised the following improvement structure based on such a basic policy.

That is, in the improved camera according to the present invention, the connecting bent portion 1c connecting the partition wall portion 1a and the spool chamber front wall portion 1b is eliminated, and the portion corresponding to the portion 1c is directed to the front side of the camera. It is characterized in that a hole having a predetermined width is opened and the light shielding member 2 is integrally molded with the partition wall portion 1a.

[0016]

According to the structure of the present invention as described above, the following effects can be obtained.

Since the manufacturing cost of the light-shielding member 2 and the parts management cost of the member 2 are not necessary and the attaching work of the member 2 is eliminated, the efficiency of the camera assembly process can be improved and the manufacturing cost can be greatly reduced. Further, since the attaching work is eliminated, the distance between the center of the spool and the partition wall portion 1a can be made smaller than that of the conventional camera, so that the camera can be downsized.

At the end of the camera assembling process when the lens barrel is assembled, the assembled state of the roller with spring 3 can be checked from the front side of the camera, so that the occurrence of the above-mentioned accident can be prevented, and the quality and auto performance can be improved more than before. It is possible to provide a camera with high loading reliability.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a camera having an improved structure according to the present invention will be described below with reference to FIGS.

FIG. 2 is a view showing a camera body 14 having an improved structure according to the present invention, a mold for molding the camera body, and a molding method.

In the camera of the present invention, in the camera body 14, the connecting portion for connecting the partition wall portion 14a separating the lens barrel housing chamber and the spool chamber and the spool chamber front wall view 14b is the partition wall portion 14a. The front wall portion 14b of the spool chamber and the front wall portion 14b of the spool chamber are separated from each other at least in the vicinity of the central portion in the vertical direction of the camera, and a hole 14d between the portions 14a and 14b is formed with a predetermined width. Further, in the molding die, the front mold 15 is formed with a projection 15a for molding the hole 14d, and between the rear mold 16 and the rear mold 16, the partition 14a is provided with a light-shielding projection 14c. The protrusion 14c has a cavity for integrally molding the light shielding member 2 in the conventional structure.

Therefore, by using the mold having such a structure, a hole 14d opening to the front side of the camera is formed between the partition wall portion 14a and the spool chamber front wall portion 14b, and the light-shielding protrusion 14c is formed. Is integrally molded with the partition wall portion 14a.

FIG. 1 is a diagram for explaining a method of incorporating the roller with spring 3 in assembling a camera having the camera body 14 molded as described above.

When the roller with spring 3 is assembled in the spool chamber R, the bent portion 3b of the spring 3a of the roller 3 is press-fitted into the hole 14d of the camera body 14 as shown in the drawing. Using the jig 17 as shown, the hole 14
The position of the spring bent portion 3b in d is positioned at a predetermined regular position. That is, the jig 17 is fixed from the front side of the camera in the same manner as the front plate 18, which is a regular assembly part. The fixed jig 17 is provided with a receiving surface 17a,
The spring bent portion 3b of the roller with spring 3 is inserted into the hole 14d of the main body from the rear of the camera, and the jig 1 is made with a thin rod-shaped tool 19.
The spring bent portion is inserted into the receiving surface 17a of the bearing 7 until it comes into contact with the bearing surface 17a, and the positioning in the front-rear direction is performed. Further, the positioning of the spring-loaded roller 3 in the left-right direction is performed by measuring the widthwise dimension of the hole 14d
And controlling the width dimension of the spring-loaded roller 3. In this way, the spring-loaded roller 3 is attached to the spool chamber R. Then, when the lens barrel 7 and the camera front plate 6 are assembled at the end of the camera assembling process, the assembled state of the spring-loaded roller 3 is inspected by looking into the hole 14d from the front side of the camera. Hole 1 as shown
The camera assembly is completed by mounting and fixing 4d on the main body 14 with the recess 6a of the front plate 6.

[0025]

As described above, according to the present invention, the following effects can be obtained.

Since the manufacturing cost of the light-shielding member 2 and the parts management cost of the member 2 become unnecessary and the attaching work of the member 2 is eliminated, the efficiency of the camera assembly process can be improved and the manufacturing cost can be greatly reduced. Further, since the attaching work is eliminated, the distance between the center of the spool and the partition wall portion 1a can be made smaller than that of the conventional camera, so that the camera can be downsized.

At the end of the camera assembling process when the lens barrel is assembled, the assembled state of the roller 3 with spring can be checked from the front side of the camera, so that the occurrence of the above-mentioned accident can be prevented, and the quality and reliability can be improved as compared with the conventional case. A highly reliable camera can be provided.

[Brief description of drawings]

FIG. 1 is a plan view of a main part showing a characteristic structural part of a camera of the present invention and a fixing means for a spring-loaded roller.

FIG. 2 is a diagram showing a structure of a camera body, a molding method, and a molding die in the camera of the present invention.

FIG. 3 is a plan view of the camera of the present invention in a completely assembled state.

FIG. 4 is a plan view showing a main structure of a conventional camera.

5 is a perspective view of a part of the structure shown in FIG.

FIG. 6 is a view showing a structure of a camera body of a conventional camera and a molding die.

[Explanation of symbols]

1, 14 ... Camera body 1a, 14a ...
Partition walls 1b, 14b ... Spool chamber front wall portion 2 ... Light blocking member 3 ... Spring-loaded roller 3a ... Spring 4 ... Film winding spool 5 ... Spring 6 ... Front plate 7 ... Lens barrel 8 ... Lens barrel housing chamber 14c ... Light-shielding protrusion 14d ... Holes 15, 16, 1
2, 13 ... Mold 17 ... Jig for mounting roller with spring

Claims (1)

[Claims] 1. A roller with a spring for pressing a film against the peripheral surface of a film take-up spool is provided in the spool chamber, and a light-shielding portion for shielding the reflected light from the roller with the spring is provided with the spool chamber for photographing. In the camera provided on the partition wall between the lens housing chamber and the partition wall, a hole for fixing the spring of the spring-loaded roller is provided between the partition wall and the front wall of the spool chamber. A camera which is open to the side and is closed by a camera front plate or the like, and the light-shielding portion is formed integrally with the partition wall portion.