JPH0224108Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera back cover device which is pivotably mounted on a camera body and can be opened and closed.

When carrying a camera while traveling, it is preferable that the camera be small and lightweight. Therefore, in recent years, there has been a call for miniaturization of cameras, and various efforts have been made to make cameras smaller. Furthermore, although it has been a long time since the camera back was hinged to open and close the camera back to make it easier to load film, there are cases where the hinge and camera key board are provided so that they protrude outward on both sides of the camera. many. FIG. 1 is a plan view showing the outline of the most common conventional 35mm camera. The hinge part H of the back cover and the key plate part L protrude from the body line, so
If the camera is placed in a pocket or the like without being housed in a case, there is a problem in that this part tends to get caught. In addition, the protrusion of these parts prevents the camera's outline from coming into close contact with the operator's palm.
It is also not favorable in terms of camera holding.

Therefore, if these parts were to fit inside the camera body, the width of the camera would increase accordingly, which would go against the demands of making the camera smaller and lighter.

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera back cover device that is suitable for reducing the size and weight of a camera and can provide a camera with a favorable external shape in terms of camera holding.

In order to achieve the above object, the camera back cover device according to the present invention engages the back cover with the camera body, and includes a cylindrical film supply space provided on one side of the camera body. A
, a cylindrical film winding space B provided on the other side, and a front surface circumscribing these spaces A and B;
Among the spaces defined by a rectangular parallelepiped space C having a back surface and left and right side surfaces, a triangular prism-shaped first space P surrounded by the outer periphery of the film supply space A and the front and side surfaces of the rectangular parallelepiped space c, It is located inside the camera body line (the outline of the camera excluding the protrusions L and H in Figure 1),
a first engaging portion that engages the camera body and the back cover; and a triangular prism-shaped second space S surrounded by the outer periphery of the film winding space B and the rear and side surfaces of the rectangular parallelepiped space C. The second engaging part is located inside the camera body line and engages the camera body and the back cover.

According to the above structure, the object of the present invention can be completely achieved.

The present invention will be explained in more detail below with reference to the drawings.

FIG. 2 is a perspective view showing the concept of a camera back cover device according to the present invention.

In the figure, A is a cylindrical film supply space in which a cartridge and the like are accommodated, and B is a film winding space for winding exposed film. A rectangular space C circumscribing these spaces forms the general outline of the camera. It is customary to provide the key plate and hinge of the camera back cover on both sides of this C.
As mentioned above, this is not preferable from the viewpoint of making the camera compact.

The inventor of the present invention has focused on the fact that it is reasonable to provide a key plate and a hinge in a substantially triangular prism-shaped space defined by these cylindrical spaces and the rectangular space. Since the film is wound around a central shaft on both the film supply side and the take-up side,
The approximately triangular prism-shaped spaces P, Q, R, and S shown in the figure are unnecessary spaces from the perspective of accommodating the film, and it is often difficult to say that these spaces are utilized effectively in conventional devices. Ta.

Figures 3 and 4 show the first part of the device according to the present invention.
It is a figure showing an example of. In this embodiment, the position P shown in FIG. 2 is the fulcrum and hinge position of the camera back, and
A key board is provided at the position.

In the figure, 1 is the camera body, 2 is the back cover, and 4 is the hinge shaft. A cartridge 12 is accommodated in the film supply space A. 6 is a pressure plate provided on the back cover 2 via a pressure plate spring 3. 7 is a sprocket for feeding the film, and 9 is a spool.

The space corresponding to the film winding space has a diameter φA. As shown in FIG. 4, the key board 11 is supported by upper and lower shelves of the body 1 so as to be movable up and down.
It is urged upward (in the locking direction) by a spring 11a. Reference numeral 11b is an operating section used to open the back cover 2. In FIG. 3, the broken line a indicates the locus of movement of the tip of the back cover 2. A protrusion 2b is provided on the inside of the back cover 2 to be engaged with the key plate 11, and when the protrusion is engaged, the tip thereof is in contact with the body 1. The light shielding member 1c is in contact with the light shielding member 1c to prevent light leakage.

FIG. 5 is a cross-sectional view showing still another embodiment. This embodiment is applied to a camera having a simple loading device, and a key board is provided at a position corresponding to P in FIG. 2, and a hinge is provided at a position corresponding to S in FIG.

In addition, in the drawings, the same numbers are attached to the members common to those previously explained in FIGS. 3 and 4.
Since this embodiment uses a simple film loading device, the hinge shaft 4 is placed quite inward.

As explained in detail above, according to the present invention, the first and second engaging parts are provided at the positions P and S so that they do not protrude beyond the camera body line, so that they do not protrude beyond the camera body line in the past. It is possible to eliminate the protruding part caused by the engaging part, and it is possible to improve the storage of the camera in a pocket and the holding of the camera, and also to realize miniaturization of the camera. In addition, since the first engaging portion is provided in the first space P, when the back cover is opened, the opening for inserting and removing the film on the film supply side can be enlarged, and the operability of inserting and removing the film can be increased. The effect is that it can be improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the external shape of a normal 35mm camera, Fig. 2 is a schematic perspective view for explaining the concept of the back cover device according to the present invention, and Fig. 3 is a first view of the back cover device according to the present invention. FIG. 4 is a perspective view showing the key board portion of the device shown in FIG. 3, and FIG. 5 is a cross-sectional view of the camera showing the second embodiment. L...Keyboard section, H...Hinge section, A...Film supply space, B...Film winding space, C...Rectangular parallelepiped space, P, Q, R, S...Triangular prism-shaped space,
1... Camera body, 2... Back cover, 3... Pressure plate spring, 4... Hinge shaft, 6... Pressure plate, 7... Sprocket, 11... Keyboard, 12... Patrone.

Claims (1)

[Claims for Utility Model Registration] (1) In a camera back cover device that engages a back cover with a camera body, there is a cylindrical film supply space A provided on one side of the camera body, and a cylindrical film supply space A provided on the other side of the camera body. Of the spaces defined by the provided cylindrical film winding space B and a rectangular parallelepiped space C having a front surface, a back surface, and left and right side surfaces circumscribing these spaces A and B, the film supply space A
A triangular prism-shaped first space P surrounded by the outer periphery of the rectangular parallelepiped space C and the front and side surfaces of the rectangular parallelepiped space C, is located inside the camera body line, and connects the camera body and the back cover. a first engaging portion that fits together, and a triangular prism-shaped second space S surrounded by the outer periphery of the film winding space B and the rear and side surfaces of the rectangular parallelepiped space C, and located inside the camera body line. 1. A camera back cover device comprising: a second engaging portion that is positioned so as to engage the camera body and the back cover. (2) The first engaging part is a hinge part that pivotally fixes the back cover to the camera body, and the second engaging part is provided on the camera body, and the second engaging part is a hinge part that pivots the back cover to the camera body. The camera back cover device according to claim 1, which is a registered utility model, characterized in that the camera back cover device is a key board portion that engages with and disengages from a back cover claw provided on the lid. (3) The first engaging portion is a key board portion provided on the camera body that engages and disengages with a back cover claw provided on the back cover by vertical movement, and
2. The camera back cover device according to claim 1, wherein the engaging portion is a hinge portion for pivotally fixing the back cover to the camera body.