JP3349837B2 - Camera back hinge structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back cover hinge structure of a camera in which a back cover is rotatably mounted on a camera body.

[0002]

2. Description of the Related Art When a back cover is made of plastic, a hinge portion is integrally formed on the back cover, and the back cover is hinged to a camera body. It is usually configured to limit the maximum opening of the back cover by bringing the end of the camera body into contact with the surface of the moved back cover.

In the case where the back cover is made of a metal plate due to a demand for compactness or the like, a technique of forming a hinge portion by curling at the end of the back cover is known.

[0004]

However, in the case where the hinge portion is integrally provided at the end of the metal plate as the back cover hinge structure as described above, the camera body is brought into contact with the surface portion to regulate the opening degree. If this is done, there is a problem that the contact portion of the back cover is damaged.

[0005] Further, since the hinge portion of the back cover is formed at an extended portion of the back cover, the support portion for rotatably supporting the hinge portion on the camera body protrudes from the surface portion of the camera. As a result, the unevenness is formed on the surface of the camera, and it is not possible to meet the design requirements for smooth surface formation. An obstacle in raising
Curling of the back cover also has a problem that it is difficult to form a complicated shape and the production is complicated.

[0006] As described above, the formation of the back cover by the metal plate is as follows.
There are difficulties in terms of manufacturing and design, and this is an obstacle to downsizing the camera.

In view of the above, the present invention has been made in view of the above circumstances, and the structure for controlling the opening degree while attaching the back cover made of a metal plate to the camera body so as to be rotatable is designed to be compact and easy to manufacture. It is an object of the present invention to provide a back cover hinge structure of a camera which can solve the problem of the camera.

[0008]

According to the present invention, there is provided a back cover hinge structure for a camera, wherein the back cover is rotatably attached to the camera body, and a hinge member fixed to an inner surface of the back cover body made of a metal plate. A stopper provided in a protruding shape on a part of the hinge member, a support portion formed on the camera body so as to rotatably support the hinge member, and a portion not exposed to the exterior of the camera body, A restricting portion that contacts the stopper and restricts the maximum opening of the back cover.

[0009]

According to the above construction, a separate hinge member is fixed to the back cover body made of a metal plate, and the hinge member is supported on the supporting portion of the camera body, so that the back cover can be rotated with respect to the camera body. When the back cover is opened, a stopper provided in a protruding shape on a part of the hinge member comes into contact with the regulating portion of the camera body to regulate the maximum opening of the back cover. Since the back cover body and the hinge member are separate bodies, the back cover body is easier to process than the case where the hinge portion is formed integrally with the back cover by curling, and the back cover body and the hinge member are assembled in the manufacturing process. Even if the number of processes is increased, it is advantageous in terms of cost, and it is possible to provide a support portion for supporting the hinge portion on the camera body without forming a projection on the surface of the camera, thereby satisfying design requirements and achieving compactness. The commercial value It can be carried out while securing.

Further, the hinge member is fixed to the inner surface of the back cover main body, and the hinge member and the support portion of the camera main body are shielded by the back cover main body. In combination with the smoothness being obtained, a more excellent surface shape in design can be obtained.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a camera having a back cover hinge structure according to an embodiment, FIG. 2 is an exploded perspective view of the main part of the camera, and FIG. 3 is a cross-sectional view of the main part with the back cover opened.

The back cover 2 of the camera 1 of this embodiment includes a back cover body 10 made of a metal plate, a holding plate 11 for holding electronic circuit components such as a date module (not shown), and a back side of a film (not shown). And a metal hinge member 13 at two upper and lower positions on the inner surface of the back cover body 10.
The back cover 2 is rotatably supported by the camera body 3 by the hinge member 13.

The back cover body 10 is formed by pressing a metal plate to form a back cover of the camera 1. The left and right ends of the vertical plate are curved, and the vertical plate is bent vertically. The lower plate constitutes a part of the bottom cover of the camera 1 (see FIG. 2).

The hinge members 13 are vertically arranged two at a time, and the hinge member 13 has a shaft hole 13b opened.
A fixing portion 13c extending inward along the back cover body 10 from the back cover body 10 is connected to the fixing portion 13c of the back cover body 10.
b is fixed by a set screw 17. Further, a positioning projection 13d is formed on the fixing portion 13c of the hinge member 13, and the projection 13d is fixedly fitted in a positioning hole of the mounting portion 10b of the back cover body 10.

The hinge portion 13a of the hinge member 13 is located inside one end 10a of the back cover main body 10, and a stopper 14 protruding near the end of the back cover main body 10 is integrally formed. One end 10a of the back cover main body 10 is provided in an arc shape centered on the shaft hole 13b of the hinge member 13.

The holding plate 11 for supporting the electronic circuit components installed inside the back cover 2 is provided by fastening a set screw 18 to the mounting portion 10b of the back cover body 10.
It is fixed to the inner surface side of 10. A flexible wiring board 19 (see FIG. 2) for the electronic circuit component extends from between the upper and lower hinge members 13 to the side of the holding plate 11, and is connected to the electronic circuit on the camera body 3 side. A nameplate 20 is provided on the back surface of the back cover 2 so as to cover the mounting portion 10b.
17, 18 etc. are hidden.

The pressure plate 12 is provided in a substantially rectangular shape.
The pressing plate spring (not shown) urges the film toward the camera body 3 by a pressure plate spring (not shown).

On the other hand, the camera body 3 is formed of plastic, has a cylindrical portion 3a for holding a lens barrel provided with a photographic lens (not shown) at the center, and a flat plate portion 3b around the cylindrical portion 3a is formed as an aperture. A substantially cylindrical patrone chamber cover 31 forming a patrone chamber is connected to one end of the camera body 3, and a substantially cylindrical spool chamber cover 32 forming a spool chamber is connected to the other end. Have been.
A patrone (not shown) containing a roll film is loaded inside the patrone chamber cover 31, and a spool 21 with a built-in winding motor is installed inside the spool chamber cover 32 to take up the roll film.

A support portion 33 for rotatably supporting the hinge member 13 of the back cover 2 is formed integrally with the spool chamber cover 32 of the camera body 3. That is, support portions 33 are provided vertically so as to protrude laterally on the outer surface of the spool chamber cover 32 disposed at the position of the rear end portion of the camera body 3, and the upper and lower support portions 33 are vertically A support hole 33a penetrating in the direction is formed.

Further, the camera body 3 near the support portion 33
The surface of the spool chamber cover 32 is provided with a restricting portion 32a to which the stopper 14 of the hinge member 13 can abut, and the restricting portion 32a contacts the stopper 14 to restrict further rotation. The contact restricting position and angle are set in accordance with the shape and position of the stopper 14 at the maximum opening of the back cover 2.

The upper and lower support portions of the camera body 3
The hinge member 13 of the back cover 2 is disposed above and below the back cover 33, and the pivot pin 15 is inserted through the shaft hole 13b and the support hole 33a. 2
Are rotatably supported.

A front cover 23 (see FIG. 1) is disposed in front of and outside of the camera body 3, and a rear end of a side wall of the front cover 23 is connected to the hinge portion 13.
I am facing a. End of front cover 23 and back cover body in closed state
A gap for rotating the arc end 10a and for moving the stopper 14 of the hinge member 13 is formed between the light-shielding member 24 and the light-shielding member 24 for minimizing the gap. is set up. The light shielding member 24 is fixed to the spool chamber cover 32 of the camera body 3 and includes a hinge portion.
The surface facing 13a is formed in an arc surface except for the arc end 10a of the back cover 2 and a gap for moving the stopper 14, and the side surface is formed to be flush with the surface of the front cover 23.

The operation of the hinge structure as described above will be described. When the back cover 2 is closed and the back of the camera body 3 is closed as shown in FIG. It is located inward from the surface and the surface irregularities are small, and it is shielded by the back cover body 10 and the front cover 23 and is not visible from the outside, and the installation of the light shielding member 24 minimizes the gap. ing.

When the back cover 2 is opened by operating a lock mechanism (not shown) for loading and unloading the patrone from the closed state, the back cover 2 is opened by the hinge member 13 about the pivot pin 15. Rotate in the opening direction. At this time, the stopper 14 of the hinge member 13 and the
The circular arc end 10a of the ten pivots so as to enter the inside through the gap with the light shielding member 24.

When the state shown in FIG.
The stopper 14 of the hinge member 13 rotates and comes into contact with the restricting portion 32a of the spool chamber cover 32 of the camera body 3, and further rotation is restricted. Since the stopper 14 having high strength and the camera body 3 are in contact with each other, regulation of the limit position is ensured.

The camera 1 of this embodiment is for loading a patrone containing a roll film by a drop-in-load method. When a normal patrone is loaded and unloaded, the back cover 2 is fully opened as shown in FIG. A locking mechanism that does not open in a state but stops at an opening of about 30 ° is provided.

[0027]

As described above, according to the present invention, a separate hinge member is fixed to the back lid body made of a metal plate, and a projection-shaped stopper is provided on a part of the hinge member, while the camera body is provided. By providing a supporting portion to the stopper and providing a restricting portion that comes into contact with the stopper, the hinge member is a separate body, thereby facilitating the processing of the back cover main body, and by forming the supporting portion for supporting the hinge member, the camera is provided. No projections are formed on the surface of the camera, the hinge structure is not visible from the outside, and a compact camera can be realized by adopting the back cover made of a metal plate while configuring a camera having high commercial value in terms of design.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a main part of a camera having a back cover hinge structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of the camera.

FIG. 3 is a cross-sectional plan view of a main part with a back cover opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera 2 Back cover 3 Camera body 10 Back cover body 13 Hinge member 13a Hinge part 13b Shaft hole 14 Stopper 15 Pivot pin 23 Front cover 24 Light shielding member 32 Spool room cover 32a Restriction part 33 Support part 33a Support hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-235154 (JP, A) JP-A-56-130921 (JP, U) JP-A-54-179135 (JP, U) JP-A-1 101238 (JP, U) Japanese Utility Model Showa 60-124168 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 17/02

Claims (1)

(57) [Claims] 1. A back cover hinge structure for a camera in which a back cover is rotatably mounted on a camera body, the hinge member being fixed to an inner surface of a back cover body made of a metal plate, and a projection formed on a part of the hinge member. A stopper provided on the camera body so as to rotatably support the hinge member; a support portion formed on a portion that is not exposed to the exterior of the camera body; A hinge structure for a back cover of a camera, comprising: a regulating unit that regulates an opening degree.