JPH1073874A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of preventing adjacent photographic frames from being exposed harm fully. SOLUTION: A loading chamber 11b in which a film cartridge is loaded, a take-up chamber 11c having the take-up shaft for film 8, a film feeding path 9 provided between the chambers 11b and 11c, and a photographing aperture 11a formed at the back position of a photographing lens 2 on the path 9 are disposed in the camera main body 11 of the camera. Light shielding lines 11g are provided on an opposed surface to the emulsion surface 8a of the upper film 8 on both sides of the aperture 11 a on the path 9 of the main body 11. A harmful light beam reflected on the emulsion surface 8a is reflected in the direction of the aperture 11a by the light shielding line 11g and attenuated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a camera, and more particularly, to a camera to which a film having a photosensitive surface is applied.

[0002]

2. Description of the Related Art As shown in a cross-sectional view of FIG. 6, a conventional camera employing a film having a photosensitive emulsion surface such as a silver halide film has a photographic opening 1a on both sides of a camera body 1 on a film feeding path 9. 1f opposite to the emulsion side of film 8
Was made of black resin with a half matte black paint or a matte finish on the surface.

[0006] In FIG. 6, a camera body 1 is supported by an exterior body 4 and supports a lens frame 3 having a photographing lens 2 so as to be able to move forward and backward. A photographing opening 1a is provided at the center of the camera body 1, and a loading chamber 1b in which a film cartridge 7 is loaded is provided at a right position thereof, and a winding shaft 6 for winding a film is provided at a left position. A winding chamber 1c is provided. A film feeding path 9 through which the film is fed is formed between the photographing opening 1a and the pressure plate 5. As shown in FIG. 7, which is a cross-sectional view taken along the line AA 'of FIG. 6, a film rail surface 1d and a pressure plate rail surface 1e are arranged above and below the photographing opening 1a along the feeding path.

[0004]

The emulsion surface, which is the photosensitive surface of the film applied to the above-described conventional camera, has been subjected to a matting process to suppress reflection. However, in recent years, a film 8 having a reduced matte degree of the matte processing on the emulsion surface 8a has appeared on the market in order to improve the photographic image performance. In this film 8, the surface reflectance of the emulsion surface 8a is considerably higher than that of the conventional film.

Using the film 8, a conventional camera shown in FIG. 6 shoots an object in which light from a light source S, such as a high-intensity light source or a spotlight, is located at the longitudinal end of a shooting screen. In the case, the subject light beam L from the light source S
Are reflected on the emulsion surface 8a, and then the opposite surface 1f and the emulsion surface 8a
, And proceeds toward the outside of the photographing aperture 1a.

At this time, since the reflectance of the emulsion surface 8a is high as described above, the degree of attenuation of the amount of reflected light is small, and the reflected light reaches the vicinity of the winding chamber 1c. FIG. 8 shows the film 8 photographed under the above-mentioned condition, and assuming that the photographed frame 8c is photographed under the above-mentioned condition, the frame 8d indicates an adjacent photographed frame photographed one frame before. The above-mentioned frame 8d, which is one frame before, has a photosensitive portion R due to a harmful ray due to the above-described repeated reflection of the subject ray L from the high-intensity light source S, thereby deteriorating the photographing screen. The film 8 is provided with a perforation 8b for detecting a feeding position.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a camera capable of preventing adjacent photographic frames from being exposed to harmful rays when photographing with the conventional camera. Aim.

[0008]

According to a first aspect of the present invention, there is provided a camera having a camera body constituting a film feeding path through which a photographic film sent from a film cartridge passes. A light-shielding line for preventing reflection is provided on at least a part of the surface of the camera body member facing the camera. In the above camera, even if the reflected light of the subject light that reaches the emulsion surface of the film is reflected by the emulsion surface, the reflected light is transmitted on the feeding path by the light-shielding line provided on the surface facing the emulsion surface. Is prevented from being further reflected outward.

According to a second aspect of the present invention, there is provided a camera for loading a film cartridge containing a photographic film, a winding chamber having a winding shaft for winding a film delivered from the cartridge, and the loading chamber. A camera having a film feeding path provided between the film feeding path and the take-up chamber, and a photographing opening provided in the film feeding path for performing exposure of a predetermined size on the film. Of the feeding path, on both sides along the film running side of the photographing aperture, at least a part of the surface facing the emulsion surface of the film, with a light-shielding line along a direction substantially perpendicular to the film running direction. The formed antireflection means is provided. In the camera, the reflection light on the emulsion surface of the film may be further reflected outward on the film feeding path during shooting by anti-reflection means provided on the film feeding path of the camera body. Is prevented.

According to a third aspect of the present invention, there is provided a camera having a camera main body constituting a film feeding path through which a photographic film sent from a film cartridge passes, wherein the camera body member has an emulsion surface of the film. An anti-reflection member separate from the camera body member is fixed to the facing surface. In the camera, the reflected light from the emulsion surface of the film during shooting is attenuated on the film feeding path by a separate anti-reflection means provided on the film feeding path of the camera body. go.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged cross-sectional view of a main portion around a shooting aperture of a camera according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA 'of FIG. FIG. 5 is a diagram viewed from the back side of the opening (the film feeding path side). FIG. 3 is a diagram showing a film photographed by the camera of FIG. It is assumed that portions not shown in FIG. 1 have the same configuration as the conventional camera shown in FIG. Further, the same reference numerals as those in FIG. 6 are used for the same components.

In the camera of this embodiment, FIG.
As shown in FIG. 2, a loading chamber 11b for loading a film cartridge 7 containing a photographic film 8 in a camera body 11.
A winding chamber 11c having a winding shaft 6 for winding the film 8 sent from the cartridge 7, a film feeding path 9 provided between the loading chamber 11b and the winding chamber 11c, The film 8 provided at a position behind the lens 2 and in the film feeding path 9.
A photographing opening 11a for performing exposure of a predetermined size is provided on the upper side.

A light-shielding line 11g serving as an anti-reflection means is provided on the film feeding path 9 of the camera body 11, on both sides of the photographing opening 11a along the film running side and opposite to the emulsion surface 8a of the film 8. Is provided. The light-shielding line 11g is formed by a plurality of fine-pitch peak-shaped cross-sectional ridges provided along a direction D2 substantially perpendicular to the film running direction D1, and ridge-and-groove grooves formed by the valleys. Further, the inclination angle .theta.1 of the photographic opening side and the inclination angle .theta.2 of the anti-imaging opening side with respect to the axis Z0 parallel to the optical axis O of the hill-shaped slope of the valley-shaped groove of one light-shielding line 11g are set so that .theta.2> .theta.1. Have been.

When an image is taken by the camera according to the present embodiment having the above-described configuration, the subject light L enters the taking aperture 11a through the taking lens 2, but the reflected light reflected by the film emulsion surface 8a is Finally, the light is reflected inward on the surface formed at the inclination angle θ1 of the light-shielding line 11g, and does not proceed in the direction of the adjacent frame.

As described above, in the camera of this embodiment, the inclination angle of the peak of the light-shielding line 11g provided on both sides of the photographing opening 11a of the camera body 11 is set to an appropriate angle such that θ2> θ1. As a result, the area of the harmful photosensitive portion R 'is narrowed as shown in the frame 8d' after the adjacent photographing, which is the screen adjacent to the photographing frame 8c 'which is the photographing screen shown in the photographed film 8 in FIG. , Almost no effect on adjacent pieces. The same applies to the frame 8e 'before adjacent shooting, which is an adjacent screen before shooting. Even if there is a high-luminance light source near the end in the photographing screen, it is possible to prevent exposure of the frame after adjacent photographing or the previous frame due to harmful rays.

Next, a camera according to a second embodiment of the present invention will be described. FIG. 4 is an enlarged cross-sectional view of a main part around a shooting opening of a camera according to a second embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line AA 'of FIG. FIG. 5 is a diagram viewed from the back side of the opening (the film feeding path side). Note that portions not shown in FIG. 4 have the same configuration as the conventional camera shown in FIG.
Further, the same reference numerals as those in FIG. 6 are used for the same components.

In the camera of this embodiment, FIG.
As shown in FIG. 5, a loading chamber 21b for loading a film cartridge 7 containing a photographic film 8 in a camera body 21.
A winding chamber 21c having a winding shaft 6 for winding the film 8 sent from the cartridge 7, a film feeding path 9 provided between the loading chamber 21b and the winding chamber 21c, The film 8 provided at a position behind the lens 2 and in the film feeding path 9.
A photographing opening 21a for performing exposure of a predetermined size is provided above.

On the film feeding path 9 of the camera body 21, on both sides along the film running side of the photographing opening 21a, opposite surfaces to the emulsion surface 8a of the film 8, a separate body from the camera body 21 is provided. An anti-reflection member 21g as anti-reflection means is fixedly provided. The anti-reflection member 21g,
It is formed of a material having a low reflectance such as a flocked member or a porous material. As shown in FIG.
It is attached to the camera body 21 so as to cover the space between 1d.

As described above, in the camera of the present embodiment, the reflection of the subject light beam L on the film emulsion surface 8a is achieved by mounting the anti-reflection member 21g on the surface of the camera body 21 opposite to the film emulsion surface 8a. The light is rapidly attenuated by the antireflection member 21g, and the harmful light rays of the adjacent portion 8d 'adjacent to the photographic frame 8c' cause the harmful light to the photosensitive portion R '. The range becomes narrow. The same applies to the frame 8e 'before the adjacent photographing, and the adverse effect of the harmful ray on the frame after the adjacent photographing or the previous frame is almost eliminated.

(Supplementary Note) Based on the above embodiment, a camera having the following configuration can be proposed. (1) A camera characterized in that a light-shielding line for preventing reflection is provided on a surface of a camera body member having a film feeding path through which a photographic film sent from a cartridge passes, the surface facing the emulsion surface of the film. According to the camera, the light reflected on the emulsion surface of the film is blocked by the light-shielding line, so that adjacent frames are reliably prevented from being exposed to harmful light.

(2) A camera according to (1), wherein the light-shielding line is provided along a direction substantially perpendicular to the film feeding direction. According to the above camera,
Light rays reflected on the emulsion surface of the film can be efficiently blocked by the light-shielding lines.

(3) In the supplementary note (1), there is provided a photographing opening which is provided in the film feeding path and is a mask for performing exposure of a predetermined size on the film. Is formed along a direction substantially perpendicular to the plane, and is formed by a plurality of continuous valley-shaped grooves formed by combining slopes having two different angles, and the one slope facing the photographing opening side is the slope. A camera having a larger angle with respect to the film surface than the other slope adjacent to the camera. According to the camera, the light reflected on the emulsion surface of the film is reflected on one slope of the light-shielding line toward the shooting aperture,
It is possible to attenuate the arrival of the harmful ray in the direction of the adjacent piece, and to prevent exposure by the harmful light.

(4) A camera characterized in that an anti-reflection member is fixed to a surface of a camera body member having a film feeding path through which a photographic film sent from a cartridge passes, the surface facing the emulsion surface of the film. According to the camera, the light reflected on the emulsion surface of the film can be reliably blocked by the antireflection member, and the adjacent frame can be prevented from being exposed to harmful light.

(5) The camera according to (4), wherein the antireflection member comprises a flocked member. According to the camera, the light reflected on the emulsion surface of the film can be reliably blocked by the flocked member, and the adjacent frame can be prevented from being exposed to harmful light.

(6) The camera according to (4), wherein the antireflection member is made of a porous material.
According to the camera, the light beam reflected on the emulsion surface of the film can be reliably blocked by the porous material, so that adjacent frames are prevented from being exposed to harmful light beams.

(7) A loading chamber for loading a film cartridge containing a photographic film, a winding chamber having a winding shaft for winding the film delivered from the cartridge, and a space between the loading chamber and the winding chamber. A film feeding path provided in the camera, and a camera having a shooting opening for performing exposure of a predetermined size on the film provided in the film feeding path, On both sides along the film running side, at least a part of the surface facing the emulsion surface of the film was provided with an antireflection means formed by a light-shielding line along a direction substantially perpendicular to the film running direction. A camera characterized in that: According to the camera, the light reflected on the emulsion surface of the film is efficiently blocked by the light-shielding line along the substantially right-angle direction, so that the adjacent screen is reliably prevented from being exposed to harmful light.

(8) A loading chamber for loading a film cartridge containing a photographic film, a winding chamber having a winding shaft for winding the film sent from the cartridge, and a space between the loading chamber and the winding chamber. A camera body member provided with a film feeding path provided in the film feeding path and a photographing opening provided in the film feeding path for performing exposure of a predetermined size on the film surface. Anti-reflection means in which an anti-reflection member separate from the camera main body member is fixed to at least a part of the path on both sides along the film running direction of the photographing opening and opposite to the emulsion surface of the film. A camera comprising: According to the above camera, a material having a low reflectance can be selected as an anti-reflection means separate from the camera body, so that light rays reflected on the emulsion surface of the film are efficiently blocked, and adjacent screens are harmful rays. Exposure is reliably avoided.

(9) The camera according to (8), wherein the anti-reflection member comprises a flocked member. According to the camera, the light reflected on the emulsion surface of the film is blocked by the flocked member, so that the adjacent screen is reliably prevented from being exposed to harmful light.

(10) The camera according to (8), wherein the antireflection member is made of a porous material. According to the camera, the light reflected on the emulsion surface of the film is blocked by the porous material, and the adjacent screen is reliably prevented from being exposed to harmful light.

(11) In the supplementary note (7) or (8), the anti-reflection means may be configured so that the light incident from the photographing aperture and reflected on the film surface is reflected again on the camera body, and Attenuates harmful rays reaching
A camera for preventing harmful exposure to an adjacent screen in a film running direction. According to the camera, the light reflected on the film surface by the anti-reflection means attenuates harmful rays reaching the film surface by being reflected again,
Sensitive light exposure of adjacent film screens is reliably avoided.

[0031]

As described above, the first aspect of the present invention is as follows.
According to the camera described above, antireflection means is provided on the surface of the camera body member having the film feeding path opposite to the film emulsion surface, so that there is a case where there is a high brightness light source near the end in the shooting screen. Even if there is, it is possible to prevent the adjacent screen from being exposed to harmful light.

According to the camera of the second aspect of the present invention,
By providing a light-shielding line substantially perpendicular to the feeding direction on the surface of the camera body member having the film feeding path opposite to the film emulsion surface, in the case where there is a high brightness light source near the end in the shooting screen. Even if there is, it is possible to efficiently prevent exposure to harmful rays on the adjacent screen.

According to the camera of the third aspect of the present invention,
An anti-reflection member having a low reflectance, which is separate from the camera body member, can be selected and fixed to a surface of the camera body member having a film feeding path opposite to the film emulsion surface. Even when there is a high-luminance light source in the vicinity, it is possible to prevent the adjacent screen from being exposed to harmful rays.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part around a shooting aperture of a camera according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA ′ of FIG. 1;

FIG. 3 is a view showing a photographic film photographed by the camera of FIG. 1;

FIG. 4 is a cross-sectional view of a main part around a shooting aperture of a camera according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line AA ′ of FIG. 4;

FIG. 6 is an enlarged cross-sectional view of a main part around a shooting opening of a conventional camera.

FIG. 7 is a sectional view taken along line AA ′ of FIG. 6;

FIG. 8 is a view showing a film taken by the conventional camera of FIG. 6;

[Explanation of symbols]

 Reference numeral 6: winding shaft 7: film cartridge 8: photographic film 8a: emulsion surface of the film 9: film feeding path 11, 21, camera body (camera body member) 11a, 21a: photographing opening 11b , 21b Loading chamber 11c, 21c Winding chamber 11g Shielding line (antireflection means) 21g Separate antireflection member D1 Film running direction D2 Right angle to film running direction direction

Claims (3)

[Claims] 1. A camera having a camera body member constituting a film feeding path through which a photographic film sent from a film cartridge passes, wherein at least a part of a surface of the camera body member facing an emulsion surface of the film is reflected. A camera having a light-shielding line for prevention. 2. A loading chamber for loading a film cartridge containing a photographic film, a winding chamber having a winding shaft for winding a film delivered from the cartridge, and a loading chamber between the loading chamber and the winding chamber. A camera having a film feeding path provided therein and a shooting opening provided in the film feeding path for performing exposure of a predetermined size on the film, wherein the film of the shooting opening in the film feeding path On both sides along the running side, at least a part of the surface facing the emulsion surface of the film is provided with anti-reflection means formed by a light-shielding line along a direction substantially perpendicular to the film running direction. A camera characterized by the following. 3. A camera having a camera body member forming a film feeding path through which a photographic film sent from a film cartridge passes, wherein the camera body member is provided on a surface of the camera body member facing the emulsion surface of the film. A camera, wherein an anti-reflection member separate from the camera is fixed.