JP2000039666A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of dealing with its miniaturization and preventing the position of a photographic frame from being deviated from an exposure aperture. SOLUTION: A film pressing plate 25 is formed to extend in the direction of feeding a photographic film 33 from an engaging part 25a fitted to the attaching part of a cartridge chamber side by caulking. The top end part 25b of the film pressing plate 25 comes into contact with the long and narrow region between the edge of the perforation 33a of the photographic film 33 and the side edge of the photographic film 33 on a side provided with the perforation 33a, to press the film 33 toward a rail surface frame as an exposure frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera.

[0002]

2. Description of the Related Art A photographic film unwound from a photographic film cartridge loaded in a cartridge chamber of a camera is wound on a winding shaft of a film winding chamber from the leading end. In conjunction with the winding of the photo film on the winding shaft, the photo film is gradually wound around the spool inside the cartridge body.

However, if the photo film is not wound to a certain extent on the take-up shaft, the photo film does not wind around the spool inside the cartridge body. For this reason, if vibration is applied to the camera during the shooting of the first few frames, even if the rotation of the spool is stopped, the roll of the photo film that has been gradually tightened inside the cartridge body will be evenly distributed. Trying to return to the loose state. As a result, the winding state of the photo film around the spool changes, and there is a possibility that the photo film slightly moves in either of the film feeding directions.

When such a problem occurs, the photographic film near the exposure opening of the camera is displaced. When the position of the photographic film is displaced from the exposure aperture, the interval between frames becomes extremely short, or conversely widens, and furthermore, a part thereof overlaps. In particular, new AP
In the photo film cartridge corresponding to S, the position of the photographing frame is determined for a pair of perforations arranged at a long interval, so if such a problem occurs, the photographing frame is subsequently determined by a photograph printer or the like. As a result, a shift occurs, resulting in a missing or white border at the edge of the screen in the printed photograph.

[0005] For this reason, for example, Japanese Patent Application Laid-Open No. 9-21703 is disclosed.
In the publication, a camera provided with a plate-like frame positioning member for preventing the front end portion from falling into and engaging with perforation and preventing the photographic film from shifting is described.

[0006]

However, with the miniaturization of the camera, the cartridge chamber and the aperture approach each other, so that the perforations on the cartridge chamber side are located near the entrance and exit of the cartridge. There is a problem that it is difficult to hold down the film using the perforation on the room side.

Further, if the photo film is prevented from being misaligned by engaging with the perforation of the photo film, an excessive force is applied to the perforation when the frame positioning member comes out of the perforation when feeding the photo film, and the end of the perforation is applied. It can also tear.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has as its object to provide a camera which can cope with a reduction in the size of the camera and does not cause the position of a shooting frame to be shifted from an exposure aperture.

[0009]

According to the present invention, there is provided an exposure frame having an aperture, a cartridge chamber for accommodating a photo film cartridge on both sides of the exposure frame, and an exposure frame drawn out of the photo film cartridge. And a film take-up chamber for accommodating the taken photo film in a roll form. One end is attached to the cartridge chamber side, and the photo film is fed from the one end toward the film take-up chamber. The film holding plate presses the photo film in the direction of the exposure frame by contacting between the perforation of the photo film and the side opposite to the exposure area at the other end. The film holding plate prevents the photographic film from being displaced in the feeding direction. Than it is.

[0010]

FIG. 2 is an external perspective view of a camera according to the present invention, and FIG. 3 is an exploded perspective view showing a main body of FIG. The camera 2 of the present invention roughly includes a main body 3, an outer cover 5 that covers the main body 3, and a lens barrel 30.

The main body 3 is provided with a well-known shutter device (not shown), a lens barrel 30 having a photographing lens 6, a finder 7, a strobe device 8, and the like. A lens barrel holding section 40 having a screw 40a on the inner surface is formed at the center of the main body 3. The lens barrel 30 having the photographing lens 6 is movably mounted inside the lens barrel holding portion 40 by engaging with the screw 40a. A cartridge chamber 11 and a film winding chamber 12 are integrally formed on both sides of the lens barrel holding section 40, respectively. On the rear side of the camera 2, the lens barrel 30 housed in the lens barrel holding unit 40 is provided.
Is provided.

FIG. 4 is a partial sectional view of the main body. A photo film cartridge 31 is stored in the cartridge chamber 11. The photo film cartridge 31 includes a cartridge body 32 and a photo film 33 stored in the cartridge main body 32. A spool 34 is rotatably incorporated inside the cartridge body 32, and a photographic film 33 is wound around the rear end thereof. On one side of the photographic film 33, perforations 33a are provided at both ends of each photographic frame, one by one.

A light-shielding lid 35 is rotatably attached to the film entrance of the cartridge body 32. Then, by rotating the spool 34, the photo film 33 is fed out from the film entrance 35.

On the lower surface of the camera 2, a cartridge chamber cover 45 for inserting and removing the photographic film cartridge 31 is mounted. An operation lever 46 for opening the cartridge chamber cover 45 is provided on a side surface of the main body 3.

On the back side of the barrel holding section 40 of the main body 3,
A rail surface frame 15 forming an exposure frame and a film support plate 16 provided to face the rail surface frame 15 are attached, and a photographic film 33 runs between the rail surface frame 15 and the film support plate 16. A film passage 14 is formed.

At the center of the rail surface frame 15, a rectangular opening is provided to form an aperture 15a. Two parallel ridges 15b are provided along two sides of the aperture 15a. These two parallel ridges 15b
Holds both ends of the photo film 33 from the front side,
The friction of the photographic film 33 running in the film passage 14 is reduced, and the photographic film 33 moves smoothly. In addition, an opening 15c is provided at an end of the recording film 33, into which a recording head (not shown) for recording information on the photo film 33 is inserted.

The film support plate 16 has screw holes 16 at four corners.
It is screwed to the main body 3 so as to cover the rail surface frame 15 with c. As shown in FIG. 5, a film holding plate 25 is provided on one side of the film support plate 16.
The film pressing plate 25 is made of an elastic and elongated metal plate, and one end forms an engaging portion 25 a fixed to the mounting portion 16 a of the film supporting plate 16. Also, the film holding plate 2
At the other end of 5, a tapered tip portion 25b is formed.

As shown in FIG. 6, the film holding plate 25
Of the film support plate 16 penetrates through the penetration hole 16 d formed in the film support plate 16 and reaches the inside of the film passage 14. As shown in FIG. 1, the film pressing plate 25 is formed so as to extend in the feeding direction of the photographic film 33 from an engaging portion 25a attached by caulking to the attaching portion 16a on the cartridge chamber 11 side.

The penetration hole 16 of the film support plate 16
d, the leading end 25b of the film holding plate 25
The elongate area between the edge of the perforation 33a of the photo film 33 and the side edge of the photo film 33 on the side where the perforation 33a is provided contacts the photo film 33 to the rail surface which is an exposure frame in which the aperture 15a is formed. Press in the direction of the frame 15. At the end of the film support plate 16, an opening 16b into which a recording head for recording information on the photographic film 33 is inserted is provided.

In the center of the film take-up chamber 12, a take-up shaft 18 having a built-in motor is provided. A film take-up chamber cover 19, which forms a part of the outer wall of the film take-up chamber 12, is attached to the rear side of the film take-up chamber 12 by screws 20 b. Inside the film winding chamber cover 19, a film passage 1 is provided.
A roller 21 for pressing the photographic film 33 fed through 4 toward the take-up shaft 18 is attached. For this reason, the roller 21 is urged in the direction of the winding shaft 18 by a coil spring (not shown).

The photographic film 33 fed through the film passage 14 is pressed against the take-up shaft 18 by the roller 21, and is wound around the take-up shaft 18 as a film roll 33a by the rotation of the take-up shaft 18. Can be

An outer cover 5 covering the main body 3 has a lens barrel 3 attached thereto.
An opening for exposing the camera, the finder 7, the strobe device 8 and the like is provided. A release button 23 is integrally provided above the outer cover 5, and a liquid crystal display (not shown) is provided on the back side. ) Is provided.

The operation of the embodiment having the above configuration will be described. In the camera 2 of the present invention, when the photographic film 33 unwound from the photographic film cartridge 31 and wound into the film take-up chamber 12 is set on the rail surface frame 15 which is an exposure frame, the camera support plate 16 penetrates. Tip portion 25 of film holding plate 25 penetrating through hole 16d
b contacts between the edge of the perforation 33a of the photo film 33 and the side end of the photo film 33 on the side where the perforation 33a is provided, and presses the photo film 33 in the direction of the rail surface frame 15; In a state where the photographic film 33 in the initial stage of the take-up is wound on the winding shaft 18 in a small amount, even if the camera 2 is subjected to vibration or the like, the winding state of the photographic film 33 with respect to the spool 34 changes and the photographic film 33 is wound. Prevents slight movement in either of the film feeding directions.

Therefore, there is no deviation due to the indexing of the photographed frame by the photographic printer or the like, and the printed photograph does not have a missing edge or a white edge at the screen edge. The film holding plate 25 is provided with an engaging portion 25a on the cartridge chamber 11 side.
Are formed so as to extend in the feeding direction of the photographic film 33 from the front end of the photographic film cartridge 31 due to the miniaturization of the camera.
It is located near the film entrance and exit and does not restrict downsizing.

Further, the leading end 2 of the film holding plate 25
5b does not fall into and engage with the perforation 33a, and contacts between the edge of the perforation 33a and the side end of the photographic film 33 on the side where the perforation 33a is provided to press the photographic film 33.
Perforation 33a when feeding photo film 33
And the end of the perforation 33a is not torn.

[0026]

As described above, according to the present invention, according to the present invention, an exposure frame having an aperture, a cartridge chamber for accommodating a photographic film cartridge on both sides of the exposure frame, and an exposure frame drawn out of the photographic film cartridge. And a film take-up chamber for accommodating the photograph film in a roll shape, one end of which is attached to the cartridge chamber side, and the photograph film is fed from the one end toward the film take-up chamber. A film holding plate that extends in parallel along the direction, the other end of which contacts between the perforation of the photographic film and the side opposite to the exposure area, and presses the photographic film in the direction of the exposure frame. Since the position of the photographic film in the feeding direction is prevented by this film pressing plate, the size of the camera can be reduced. Corresponding to the position of the photographic frame is to be able to provide a camera never deviate from the exposure opening.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a positional relationship between a film holding plate and a photo film in a camera of the present invention.

FIG. 2 is an external perspective view of the camera of the present invention.

FIG. 3 is a partial sectional view of a main body of the camera of the present invention.

FIG. 4 is a partial sectional view of the camera of the present invention.

FIG. 5 is a perspective view of a main part showing a film support plate and a film holding plate of the camera of the present invention.

FIG. 6 is a sectional view when FIG. 1 is viewed from the side.

[Explanation of symbols]

 2 Camera 3 Main unit 5 Outer cover 12 Film take-up chamber 14 Film passage 15 Rail surface frame 16 Film support plate 18 Take-up shaft 19 Film take-up chamber cover 21 Roller 25 Film press plate 25b Tip 31 Photo film cartridge 33 Photo film 33a perforation

Claims (1)

[Claims] An exposure frame having an aperture, a cartridge chamber for accommodating a photo film cartridge on both sides of the exposure frame, and a film winding chamber for accommodating a photo film drawn from the photo film cartridge in a roll shape. In each of the cameras provided, one end is attached to the cartridge chamber side, and the photographic film extends from the one end in parallel along the direction in which the photographic film is fed toward the film winding chamber, and the other end of the photographic film is connected to the cartridge chamber. A film holding plate for pressing the photographic film in the direction of the exposure frame is provided in contact with the perforation and the side opposite to the exposure area, and the film holding plate is used in the feeding direction of the photographic film. A camera characterized by preventing displacement.