JPH0719747U - Camera screen restraint - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a shooting screen control device for a camera with a simpler structure. [Structure] Two light-shielding plates for narrowing the vertical width of a shooting screen are integrally configured, and one of the two light-shielding plates and the aperture frame that are integrated has a permanent magnet, and the other one However, the photographing screen regulation tool of the camera having a magnetic material to be attracted to the permanent magnet.

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention relates to a photographing screen regulating tool for a camera, and particularly to a photographing screen regulating tool suitable for panoramic photographing.

[0002]

[Prior art and its problems]

 In panoramic shooting with a still camera, a certain width above and below the film surface is shielded from light by a certain amount, and shooting is performed on a screen with a ratio that is longer than the normal shooting screen.When printing, this horizontal screen is printed on landscape printing paper. is there. There is a dedicated camera for panoramic shooting, but this is only used for panoramic shooting, and there was the inconvenience of having to carry it with an ordinary camera.

[0003] Therefore, there has been devised a photographing screen regulating tool that can be fixed to an aperture frame of a normal camera and can shield the upper and lower sides of the aperture with a constant width for panoramic photographing. This photographing screen regulating tool will be described with reference to FIGS. A photographic lens 13 and a back cover 15 that can be opened and closed are provided in front of and behind a camera body 12 of a normal camera 11. On the left and right sides of the camera body 12, there are formed a cartridge chamber 17 and a spool chamber 19 for winding the film sent from the cartridge chamber 17 on a spool. An aperture 20 composed of upper and lower aperture frames 18 and left and right aperture frames 21 is provided in the middle of the cartridge chamber 17 and the winding chamber 19.

The photographing screen restrictor 22 has two light-shielding plates 23 which should be located above and below the aperture 20, and the light-shielding plates 23 are spaced by a constant width by the frame members 25 and 26. It is positioned. Sliding support members 31 each having a U-shaped cross section are attached to the upper surfaces of the two light shielding plates 23, respectively, and the sliding portions 27 integrally formed with the frame member 25 and the frame member 26 are integrated. The formed 29 are inserted into the slide supporting members 31 and supported so as to be slidable in the left and right directions. The sliding portions 27, 29 have their tips 27a, 29a engaged with both ends of a compression spring 32 located in the opening of the sliding support member 31, respectively. It is spread to the left and right as shown in Fig. 6. The frame members 25 and 26 are bent in directions away from the sliding portions 27 and 29, respectively, and thereby gaps 33 are formed between the frame members 25 and 26 and the light shielding plate 23, respectively.

Therefore, when the photographing screen restrictor 22 having such a configuration is used, the frame members 25 and 26 are centered against the compression spring 32 by a specially-shaped mounting tool (not shown). The lateral width formed by the frame members 25 and 26 is narrowed. Then, the left and right end portions of the upper and lower light shielding plates 23 are brought into contact with the aperture frame 21, and the fixture is removed from the photographing screen restrictor 22 in this state. Then, the frame members 25 and 26 are expanded in the left-right direction by the compression spring 32 and the left and right gaps 33 are fitted into the aperture frame 21, so that the photographing screen restrictor 22 is fixed to the aperture 20 and its vertical width is increased. Shield a predetermined amount.

However, the conventional photographing screen restrictor 22 having such a structure has a large number of parts such as a compression spring 32 that spreads the frame members 25 and 26 to the left and right, and has a complicated structure, which is simpler. The structure is coveted.

[0007]

[The purpose of the device]

 The present invention has been made in view of such conventional problems, and an object thereof is to obtain a photographing screen regulating tool for a camera having a simpler structure.

[0008]

[Outline of the device]

 The present invention that achieves the above object is, therefore, capable of being attached to and detached from a horizontally elongated aperture frame of a camera, and has a two screen plate for shielding the upper and lower parts of the aperture of the camera when the camera is mounted. In the tool, the two light shields are integrally formed, and one of the two light shields integrated and the aperture frame has a permanent magnet, and the other has a permanent magnet. The feature is that it has a magnetic material to be attracted to the magnet.

[0009]

[Example of device]

 The present invention will be described below with reference to illustrated embodiments. As shown in FIG. 2, the photographing screen restrictor 34 according to the present invention has two light shielding plates 35 integrally formed via left and right frame members 36. An opening 37 is formed in the middle of the plate 35. A box-shaped frame body 39 is provided on each of the two light-shielding plates 35, and the box-shaped frame body 39 is formed in a rectangular parallelepiped shape that enters the aperture 20 at a predetermined depth. The box-shaped frame body 39 has a light shielding plate portion 39a for shielding the mounting claw insertion hole 35a formed in the light shielding plate 35 from light. A portion of the photographing screen regulation tool 34 that protrudes from the upper and lower box-shaped frame members 39 is a contact surface 38 that contacts the upper and lower aperture frames 18 of the aperture 20. At least the frame member 36 of the photographing screen regulating tool 34 is made of a magnetic material such as an iron material that can be attracted by a permanent magnet. On the other hand, the camera 11 to which the present proposal is applied is substantially the same as that described with reference to FIG. 5, except that the frame member 36 of the photographing screen restrictor 34 should be attracted to the left and right aperture frames 21 of the aperture 20. Each permanent magnet 24 is provided.

A mounting tool 40 shown in FIG. 4 is used when mounting the photographing screen restricting tool 34 on the aperture 20, and the mounting tool 40 is mounted on the main body 41 and the lower part of the main body 41. It has mounting claws 42 formed by projecting downward from the left and right and bending the tip.

The main photographing screen restrictor 34 having the above-described configuration can be used as follows. First, the main body 41 of the mounting tool 40 is picked up with fingers, and both mounting claws 42 thereof are inserted into the both mounting claw insertion holes 35a of the photographing screen regulation tool 34 and held. Then, the back cover 15 of the camera 11 is left open, and the upper and lower ends of the two box-shaped frame bodies 39 are aligned with the upper and lower ends of the inner side surface of the aperture 20 and inserted into the aperture 20. Then, as shown in FIG. 3, the photographing screen regulating tool 34 causes the box-shaped frame body 39 to enter the aperture 20 by a predetermined amount, and the left and right frame members 36 and the upper and lower abutting surfaces 38 are left and right. The frame 21 and the upper and lower aperture frames 18 are brought into contact with each other. Therefore, even if the aperture 20 has a shutter screen, the box frame 39 does not come into contact with the shutter screen. The photographing screen regulation tool 34 is thus stably supported by keeping the side surface of the box-shaped frame body 39 in contact with the inner wall of the aperture 20 in this way so as not to rattle in the vertical and horizontal directions, and the left and right aperture frames 21. The frame member 36 is attracted to the permanent magnets 24 provided in each of them, so that the frame member 36 is fixed so as not to come out of the aperture 20. In this state, the aperture 20 is shielded from the upper and lower parts by a certain amount, so that it is possible to form a so-called shooting screen for panoramic shooting.

After the panoramic shooting is finished, if the shooting screen restricting tool 34 is to be removed from the aperture 20, it is possible to remove it by hand, but there is a fear that the flatness of the shooting screen restricting tool 34 may be disturbed. The left and right mounting claws 42 of the mounting tool 40 are inserted into and hooked in the two upper and lower mounting claw insertion holes 35a as in the case of mounting, and are pulled rearward against the magnetic force of the permanent magnet 24. Thereby, the photographing screen regulation tool 34 can be easily removed from the aperture 20.

Although the permanent magnet 24 is provided on the side of the aperture 20 in this embodiment, it is provided on the side of the photographing screen restrictor 34 and the magnetic material to be attracted to the permanent magnet 24 on the side of the photographing screen restrictor 34. May be provided on the side of the aperture 20. When the camera body of the camera 11 is made of a magnetic material such as iron, it is not necessary to provide a special magnetic material on the camera 11 side, and only the permanent magnet 24 needs to be provided on the photographing screen restricting tool 34 side. Further, even when the periphery of the aperture is made of a magnetic material instead of the entire body of the camera, it is not necessary to provide a special magnetic material on the camera 11 side, and the permanent magnet 24 is provided on the photographing screen restricting device 34 side. All you have to do is provide it.

[0014]

[Effect of device]

 As described above, according to the present invention, two light shields are integrally formed, and one of the two light shields and the aperture frame has a permanent magnet, and the other has a permanent magnet. Since it has a magnetic material to be attracted, it can be fixed with a permanent magnet by simply fitting it into the aperture frame, and can be easily removed from the aperture by pulling against the permanent magnet. The operation is extremely easy, and it is possible to obtain a shooting screen regulating tool with a simpler structure.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera showing an aperture for attaching and detaching a photographing screen restrictor of the present invention.

FIG. 2 is a perspective view showing a photographing screen restrictor according to the present invention.

FIG. 3 is a cross-sectional view showing a state in which a photographing screen regulating tool is fitted in the aperture.

FIG. 4 is a perspective view showing a fixture.

FIG. 5 is a perspective view showing a state in which a conventional photographing screen regulating tool is attached to an aperture frame of a camera.

FIG. 6 is a perspective view showing a conventional photographing screen regulating tool.

FIG. 7 is a cross-sectional view showing a state in which a conventional photographing screen regulating tool is attached to the aperture.

[Explanation of symbols]

 11 Camera 12 Camera Body 13 Photographic Lens 15 Back Lid 18 21 Aperture Frame 20 Aperture 24 Permanent Magnet 34 Photograph Screen Control Tool 35 Light-Shielding Plate 35a Mounting Claw Insertion Hole 36 Frame Member 37 Opening 38 Abutment Surface 39 Box Frame 39a Light-Shielding Plate Part 40 Mounting tool 42 Mounting claw

Claims (3)

[Scope of utility model registration request] 1. A photographing screen restricting device for a camera, which is detachable from a horizontally long aperture frame of a camera and has two light shielding plates for shielding the upper and lower parts of the aperture of the camera when the camera is mounted, wherein the two light shielding plates are provided. And one of the two light-shielding plates and the aperture frame integrated with each other has a permanent magnet, and the other has a magnetic material to be attracted to the permanent magnet. A shooting screen control tool for a camera characterized by being. 2. The photographing screen regulating tool for a camera according to claim 1, wherein the permanent magnet is provided on the aperture frame, and the magnetic material is provided on the side of the two light shielding plates. 3. The photographing screen regulating tool for a camera according to claim 1, wherein the permanent magnet is provided on the side of the two light shielding plates, and the magnetic material is provided on the aperture frame.