JP2001249386A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem where a cartridge chamber cover becomes large in the case of adopting small case type light shielding structure over the entire periphery of the cartridge chamber cover and a cartridge chamber. SOLUTION: In this camera where a cartridge chamber 14c, in which a film cartridge is loaded in the axial direction is formed and which is provided with the cartridge chamber cover opening/closing the aperture of the chamber 14c, a projection part 1a is formed at one part of an inner surface side in the cartridge chamber cover, and a rubber light shielding member 2, is attached to the projection part 1a. When the cartridge chamber cover is in a closed state, the light-shielding member is pressed to one part 14c of the periphery part of the aperture of the cartridge chamber, and a part other than the part to which the light-shielding member is pressed out of the periphery part of the aperture thereof and the cartridge chamber cover are fit through projecting and recessed parts by the small case type structure, whereby the external light entering the cartridge chamber is intercepted.

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 cartridge chamber cover for opening and closing a cartridge chamber in which a film cartridge can be loaded in an axial direction.

[0002]

2. Description of the Related Art In a camera as described above, as a structure for blocking external light from entering the cartridge chamber from around the lid of the cartridge chamber, the entire periphery of the opening of the cartridge chamber and the lid of the cartridge chamber are fitted. In general, a so-called intaglio structure is used, which is a highly reliable light shielding structure.

As shown in FIG. 7, an elastic member 22 such as maltprene or suede is attached to the cartridge chamber lid 2.
1 (or the wall surface of the cartridge chamber), and when the cartridge chamber lid 21 is in the closed state, the elastic member is sandwiched and compressed between the cartridge chamber lid 21 and the wall surface of the cartridge chamber, thereby invading external light. There is also known a structure that shuts off the air. In FIG. 7, one elastic member 22 is attached, but there is also a type in which a plurality of elastic members are attached.

Further, as shown in FIGS. 8 to 10, when a rubber packing is provided on the cartridge chamber side (inner side) of the cartridge chamber lid, and when the cartridge chamber lid is closed,
There is also known a structure in which rubber packing is compressed between the entire circumference of the cartridge chamber lid and the entire circumference of the cartridge chamber to block external light from entering.

FIG. 8 is an exploded view of the cartridge chamber lid as viewed from the cartridge chamber side, and FIG. 9 is an exploded view of the cartridge chamber lid viewed from the outside of the cartridge chamber lid. FIG. 10 is a view of the assembled cartridge chamber cover as viewed from the cartridge chamber side. In these figures, 31 is a main body of the cartridge chamber lid, 32 is a rubber packing, and 33 is a cart inner cover for pressing the rubber packing 32 against the main body 32.

As the structure of the cartridge chamber lid, the present applicant has proposed a configuration in which a tripod screw hole is formed in the cartridge chamber lid in Japanese Patent Application Laid-Open No. 9-160120. Forming a tripod screw hole in the lid of the cartridge chamber in this way can be said to be one of the effective methods of using the space of the camera.

[0007]

However, as described above, when the ink cartridge structure is employed over the entire periphery of the cartridge chamber lid and the cartridge chamber, there is a disadvantage that the cartridge chamber lid becomes large and the entire camera becomes large. This is because, particularly, in order to provide an intaglio structure near the opening / closing hinge portion of the cartridge chamber lid, it is necessary to largely separate the hinge portion from the cartridge chamber.

Further, in a configuration in which the suede or malt prene is attached to the lid of the cartridge chamber or the wall surface of the cartridge chamber, it is difficult to control the amount of compression of the suede or malt prene, and lacks light blocking reliability. Moreover, suede and moltoprene have a problem in reliability against long-term aging, and it is difficult to reliably perform light shielding for a long period of time.

Further, when the cartridge chamber cover is closed to shield the light from the entire circumference of the cartridge chamber by compressing the rubber packing, a large part is required as an expensive rubber packing, and there is no problem in reliability. There is a problem that the structure becomes expensive.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera which uses a rubber member as small as possible to realize high light-shielding reliability around a cartridge chamber lid at low cost.

[0011]

In order to achieve the above object, according to the present invention, there is provided a cartridge chamber in which a film cartridge can be loaded in an axial direction, and a cartridge chamber lid for opening and closing an opening of the cartridge chamber. In the camera, a projection is formed on a part of the inner surface side of the cartridge chamber lid, and a rubber light-shielding member is attached to the projection, and when the cartridge chamber lid is in the closed state, the periphery of the opening of the cartridge chamber is closed. A part of the light-shielding member is pressed, and a part other than the part where the light-shielding member is pressed out of the above-mentioned opening and the cartridge chamber lid are fitted into the unevenness of the ink cartridge structure or the like to prevent external light from entering the cartridge chamber. I try to shut it off.

That is, a rubber light-shielding member is attached to a projection formed on a part of the cartridge chamber lid, and the light-shielding member is pressed against a part of the periphery of the opening of the cartridge chamber to enter the cartridge chamber from this part. In addition to blocking the intrusion of external light, the other parts around the opening are blocked by the concave-convex fitting structure, so that the cost of the entire cartridge chamber lid can be reduced and the light shielding reliability can be reduced. To improve.

In particular, by providing the projection and the rubber light blocking member in the vicinity of the hinge portion, which leads to an increase in the size of the cartridge chamber lid when the concave and convex fitting structure is provided in the cartridge chamber lid, the cartridge chamber lid can be reduced in size and, consequently, the camera. Can be reduced in size.

Further, by forming the light-shielding member from highly durable silicon rubber, it is possible to obtain high light-shielding reliability over a long period of time.

As the projection for attaching the light shielding member, a portion for forming a screw fastening portion for fastening a tripod screw from the outer surface side of the cartridge chamber lid is used, and this projection is also used for the light shielding structure. By using it effectively,
It is not necessary to form a dedicated projection for attaching the light shielding member to the cartridge chamber lid, and the cartridge chamber lid and the camera can be reduced in size.

[0016]

1 to 6 show a camera and a cartridge chamber cover according to an embodiment of the present invention. FIG. 1 is an exploded view of the cartridge chamber lid and seen from the cartridge chamber side (inner side), and FIG. 2 is an exploded view of the cartridge chamber lid seen from the side opposite to the cartridge chamber side (outer side). FIG. 3 and 4 are views of the cartridge chamber lid in an assembled state as viewed from the outside and the inside, respectively. 5 and 6 are views of the camera as viewed obliquely from below. FIG. 5 shows a state where the cartridge chamber lid is closed, and FIG. 6 shows a state where the cartridge chamber lid is open.

In these figures, reference numeral 1 denotes a main body (lid main body) of a cartridge chamber lid, and a hinge shaft 1b for connecting the cartridge chamber lid to the camera main body 14 so that the cartridge chamber lid can be freely opened and closed. Are formed integrally. The hinge shaft 1b is rotatably assembled to a hinge receiving portion 14b of the camera body 14, and the assembled portion is held down by a front cover 7 and a back cover 8, which are exterior members of the camera. As a result, the cartridge chamber cover is connected to the camera body 14 so as to be freely opened and closed.

Reference numeral 1c denotes a hook formed integrally with the lid body 1, and the hook 1c
By engaging with a claw receiving portion (not shown) formed on the side, the cartridge chamber lid is locked and held in a closed state as shown in FIG.

Reference numeral 1a denotes a projection formed on the cartridge chamber side (inner side) of the lid main body 1. Inside the projection 1a, a camera provided on a tripod (not shown) from the outer side of the lid main body 1. A female screw portion 1e to which the fixing screw is fastened is formed. That is, the projection 1a is formed integrally with the lid main body 1 as a back side portion for forming a screw fastening portion to which the camera fixing screw is fastened.

In FIG. 1, reference numeral 2 denotes an annular rubber packing (light-shielding member) formed of silicone rubber, which is mounted around the projection 1a from the cartridge chamber side.
3 is a cart inner which is attached to the inner surface side of the lid body 1 after the rubber packing 2 is attached to the projection 1a, thereby pressing down a part of the rubber packing 2 with respect to the lid body 1 to prevent the rubber packing 2 from floating. It is a cover (inner lid). The cart inner cover 3 is fixed to the lid body 1 by tightening screws 4 into screw holes 1d.

Cart inner cover 3 with respect to lid body 1
3 and 4, a portion of the rubber packing 2, which is pressed against the inner wall of the cartridge chamber when the lid of the cartridge chamber is in the closed state, is exposed.

Reference numeral 5 denotes a cart ball for holding a film cartridge (not shown) with an appropriate force. Reference numeral 6 denotes a cart outer cover for holding a spring (not shown) for urging the cart ball 5 toward the film cartridge. is there.

In FIG. 5, reference numeral 9 denotes a cartridge lid opening knob for releasing the closing lock of the cartridge chamber lid and opening the cartridge chamber lid. The description of the opening mechanism of the cartridge chamber lid will be omitted.

Reference numeral 10 denotes an eyepiece of a camera;
Denotes a main switch of the camera, 12 denotes a zoom button of the camera, and 13 denotes a battery cover of the camera.

Further, in FIG. 6, reference numeral 14c denotes a cartridge chamber formed in the camera body 14, and a film cartridge (not shown) is loaded in the cartridge chamber 14c in its axial direction (axial direction of the spool in the cartridge). Is done. Reference numeral 14a denotes a cartridge chamber rib which forms an uneven intaglio structure (concavo-convex fitting structure) with the lid main body 1 and the cart inner cover 3, and is formed in a portion of the periphery of the opening of the cartridge chamber 14c except for the vicinity of the hinge receiving portion 14b. Have been.

Reference numeral 14d denotes a packing pressing surface formed above the hinge receiving portion 14b in the periphery of the opening of the cartridge chamber 14c, and is formed in such a manner that the inner wall of the cartridge chamber 14c is partially recessed.

In the camera constructed as described above, when the cartridge chamber lid is changed from the open state shown in FIG. 6 to the closed state shown in FIG. 5, the exposed portion of the rubber packing 2 is placed on the packing pressing surface 14d of the cartridge chamber 14a. Pressed,
Compressed. Further, the cartridge chamber rib 14a, the lid main body 1 of the cartridge chamber lid, and the cart inner cover 3 are brought into close contact with each other by fitting the seals.

As described above, in this embodiment, the pressing of the rubber packing 2 on the side of the cartridge chamber lid against the packing pressing surface 14d of the periphery of the opening of the cartridge chamber 14c, and the fitting of the ink cartridge of the cartridge chamber lid to the cartridge chamber rib 14a. Thereby, the intrusion of external light into the cartridge chamber 14c from around the lid of the cartridge chamber is reliably blocked. Since the rubber packing 2 is made of silicon rubber having high durability against repeated compression, light-shielding reliability can be maintained for a long period of time. In addition, the packing pressing surface 14d is
4c is provided in the vicinity of the hinge structure of the cartridge chamber lid in the periphery of the opening of 4c, so that the hinge structure is formed so as to extend greatly from the lid main body 1 as compared with the case of forming an intaglio structure in the vicinity of the same. This is effective for reducing the size of the cartridge chamber lid and, consequently, the overall size of the camera.

The rubber packing 2 is small enough to be mounted around the protrusion 1a formed small on a part of the lid body 1, so that it is small as a component and can be mounted, for example, all around the lid of the cartridge chamber. It can be manufactured at a lower price than in the case of having a large size.

In the present embodiment, since a portion for forming a screw fastening portion 1e for fastening a tripod screw is used as the projection 1a for attaching the rubber packing 2, it is conventionally formed on the cartridge chamber lid. The used screw fastening portion can be effectively used for the light shielding structure. That is, there is no need to form a dedicated projection for attaching the rubber packing 2, and the cartridge chamber lid can be made more compact.

In the present embodiment, the case where a portion for forming a screw fastening portion for fastening a tripod screw is used as the projection for attaching the rubber packing 2 has been described. The part may be formed as a dedicated part for attaching the packing member. Further, as the light shielding member, a general synthetic rubber other than the silicone rubber may be used, or a rubber member having no annular packing shape may be used.

[0032]

As described above, according to the present invention,
A rubber light-shielding member is attached to a projection formed on a part of the cartridge chamber lid, and this light-shielding member is pressed against a part of the periphery of the opening of the cartridge chamber to prevent external light from entering the cartridge chamber from this part. In addition to blocking the light, the other parts around the opening are prevented from invading external light by a concave-convex fitting structure, so that the cost of the entire cartridge chamber lid is reduced and the reliability of light shielding is improved. Can be planned.

In particular, the projection and the rubber light-shielding member are provided in the vicinity of the hinge portion, which leads to an increase in the size of the cartridge chamber cover when the concave-convex fitting structure is provided in the cartridge chamber lid, thereby reducing the size of the cartridge chamber lid and, consequently, the camera. Can be reduced in size.

If the light-shielding member is made of highly durable silicon rubber, high light-shielding reliability can be obtained for a long period of time.

As the projection for attaching the light shielding member, a portion for forming a screw fastening portion for fastening a tripod screw from the outer surface side of the cartridge chamber lid is used, and this projection is also used for the light shielding structure. If used effectively, there is no need to form a dedicated projection for attaching the light blocking member to the cartridge chamber lid, and the cartridge chamber lid and the camera can be made more compact.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view (viewed from the inside) of a cartridge chamber lid of a camera according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the cartridge chamber cover (a view as viewed from the outer surface side).

FIG. 3 is a perspective view of the cartridge chamber lid (as viewed from the outside).

FIG. 4 is a perspective view of the cartridge chamber cover (a view as viewed from the inside).

FIG. 5 is a perspective view of the camera with a cartridge chamber lid closed.

FIG. 6 is a perspective view of the camera with the cartridge chamber lid open.

FIG. 7 is a perspective view of a conventional cartridge chamber lid (a suede pasting type).

FIG. 8 is an exploded perspective view of a conventional cartridge chamber cover (a view as viewed from the inside).

FIG. 9 is an exploded perspective view of a conventional cartridge lid (a view seen from the outer surface side).

FIG. 10 is a perspective view of a conventional cartridge chamber lid (as viewed from the inside).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lid body 1a ... Protrusion part 1b ... Hinge shaft 2 ... Rubber packing 3 ... Cart inner cover 4 ... Screw 5 ... Cart ball 6 ... Cart outer cover 7 ... Front cover 8 ... Back cover 9 ... Cart opening knob 10 ... Eyepiece window Unit 11: Main SW knob 12 ... Zoom button 13 ... Battery cover 14 ... Camera body 14c ... Cartridge chamber 22 ... Suede 31 ... Cartridge cover 32 ... Rubber packing 33 ... Cart inner cover

Claims (5)

[Claims] 1. A camera having a cartridge chamber in which a film cartridge can be loaded in an axial direction and having a cartridge chamber lid for opening and closing the opening of the cartridge chamber, wherein a projection is formed on a part of the inner surface side of the cartridge chamber lid. A rubber light-shielding member is attached to the projection, and when the cartridge chamber lid is in a closed state, the light-shielding member is pressed against a part of the opening around the cartridge chamber, and A camera, wherein a portion other than a portion where the light shielding member is pressed of the portion and the cartridge chamber lid are fitted into the concave and convex portions to block external light from entering the cartridge chamber. 2. The cartridge chamber lid has a hinge portion which is held to be able to open and close with respect to a camera body, and wherein the projection is formed near the hinge portion in the cartridge chamber lid. 2. The method according to claim 1, wherein
The camera according to. 3. The camera according to claim 1, wherein the light blocking member is formed of silicone rubber. 4. The device according to claim 1, wherein the protrusion is a portion for forming a screw fastening portion for fastening a tripod screw from the outer surface side of the cartridge chamber lid.
The camera according to any one of the above. 5. The cartridge chamber lid includes a lid main body and an inner lid attached to an inner surface side of the lid main body, wherein the protrusion is formed on an inner surface side of the lid main body. 5. The light shielding member is pressed against the lid body by the inner lid.
The camera according to any one of the above.