JPH08339028A - Camera - Google Patents

Abstract

PURPOSE: To provide a camera having a mechanism holding the flatness of an exposure surface whether a back paper exists or not at the time of exposing a film surface and preventing trouble that the film surface is damaged or warped at the time of feeding film. CONSTITUTION: This camera is provided with a pair of plate-like members 3 arranged on a back cover 1 side so as to be opposed to both ends in the width direction of the film 10, being long in the feeding direction of the film 10, and inclined at an acute angle to an optical axis; a plunger 4 being a driving means moving the member 3 in an optical axis direction with respect to the film 10; and a roller member 7 rotatably arranged at an opposite position in the case of interposing the film 10 between the member 3 and the member 7 and on the outside of an exposure range for the film 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera having a mechanism for improving the flatness of the exposed surface of a roll-shaped film loaded in the camera body.

[0002]

2. Description of the Related Art Photographing is performed using a roll-shaped film, for example, a 35 mm width roll film accommodated in a 135-type film cartridge, 120-type or 220-type roll film (so-called Brownie film), etc. In the camera, the roll film or the like arranged behind the photographing opening in the camera main body is provided in the vicinity of the photographing opening by a pressure plate arranged on the inner wall surface side of the back cover or the like on the back side of the camera. By crimping to the film rail surface or the like forming the provided film feeding path, and sandwiching the film between the pressure plate and the film rail surface, the flatness of the exposed surface of the film is improved, Various proposals have hitherto been made and generally put into practical use for cameras having a holding mechanism.

For example, in the apparatus disclosed in Japanese Utility Model Publication No. 46-1415, during film feeding, in order to prevent friction generated between the film surface and the pressure plate or the like, during film winding operation, While the pressure plate is released from the pressure bonding operation, the pressure plate and the film surface are brought into a pressure bonded state after the film winding operation.

Further, in the apparatus disclosed in Japanese Utility Model Publication No. 56-40964, the width of the film is reduced by disposing a leaf spring or the like for extending the film in the width direction of the film on the pressure-bonding surface of the film by the pressure plate. The flatness of the exposure surface in the direction is further improved and held.

[0005]

However, as described above, when the entire film surface is uniformly pressed by the pressure plate or the like, a convex portion is formed on a part of the exposed surface of the film. Therefore, there is a problem in that good flatness cannot be obtained.

That is, FIG. 11 is a view showing a state of the exposed surface of the film when the exposed surface of the film is pressed against the film rail surface by the pressure plate or the like, and is taken along a line orthogonal to the film feeding direction. It is sectional drawing cut | disconnected by.

As shown in FIG. 11, in the camera 100, the film 110 is arranged along the surface of the film rail 101 forming the film feeding path in the width direction thereof, and a back cover (not shown) or the like. Is closed, the pressure plate 102 disposed on the inner wall surface side of the back cover or the like.
However, both widthwise end portions of the film 110 are crimped to the film rail 101, respectively.

Here, when the case back or the like is opened,
Since the pressure plate 102 has been released from the pressure-bonding of the film to the exposed surface, the film (110)
As shown by the dotted line in FIG. 11, the central part of the film surface rises in a substantially convex shape toward the back side of the camera, that is, toward the rear in the optical axis direction due to the curl of the film itself. Become.

Therefore, the back cover or the like is closed, and the exposed surface of the film is pressed against the surface of the film rail 101 by the pressure plate 102, so that the cross-sectional shape of the film 110 is as shown by the hatched portion in FIG. In addition, it is possible to suppress, to some extent, the substantially convex shape generated in the central portion of the film (110) surface in the pressure release state of the pressure plate 102 (the state shown by the dotted line in FIG. 11).

However, in the central portion of the surface of the film 110, as shown in FIG. 11, it is possible that a slightly convex lift is generated toward the front side of the camera, that is, toward the subject side. In such a case, there is a problem that good flatness of the exposed surface of the film 110 cannot be maintained.

Further, when the film is fed, the pressing force of the film 110 on the surface of the film rail 101 is constantly applied to the film 110 by the pressure plate 102. Film 110 and film rail 101
There is also a problem that an accident such as scratching or distorting the film surface occurs due to friction generated between the film surface.

On the other hand, according to the means disclosed in Japanese Utility Model Publication No. 46-1415, it is possible to prevent an accident such as scratching or distortion of the film surface during film feeding. At the time of exposure, since the pressure plate is only pressure-bonded to the film surface, as described above, due to the curl of the film itself (curling),
The problem that good flatness cannot be obtained cannot be solved.

According to the means disclosed in Japanese Utility Model Publication No. 56-40964, the film is stretched in the width direction by a leaf spring during exposure,
Although it is possible to further improve the flatness of the film surface,
Since the film surface is always pressed against the film rail surface by the leaf spring even when the film is fed, the problem that the film surface is damaged or an accident such as distortion occurs occurs. It will not be resolved.

An object of the present invention is to solve the above-mentioned conventional problems and to maintain the flatness of the exposed surface of the film when exposing the film surface, while maintaining the flatness of the exposed surface of the film when feeding the film. Another object of the present invention is to provide a camera having a mechanism for preventing accidents such as scratches and distortion.

[0015]

The camera according to the present invention comprises:
At least a pair of plate-shaped members which are provided on the case back side so as to face both ends in the width direction of the film and are long in the feeding direction of the film and inclined at an acute angle with respect to the optical axis, and the plate-shaped members. Drive means for moving in the optical axis direction with respect to
A roller member is provided rotatably at a position opposite to the plate-shaped member with respect to the film and outside the exposure range of the film.

Further, the plate-like member is moved to the film side when the film is exposed.

The plate-like member is moved to a position where the roller member is rotated with the film sandwiched during exposure of the film.

[0018]

When the film is exposed, at least a pair of plate-like members are provided on the case back side so as to face both ends in the width direction of the film, and are long in the film feeding direction and inclined at an acute angle with respect to the optical axis. The member is moved in the optical axis direction with respect to the film by the driving means.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a rear view showing the outline of the camera of the first embodiment of the present invention, and shows a case where the back cover of the camera is opened. 2 and 3 are central longitudinal cross-sectional views when the back cover of the camera of the first embodiment is in a closed state, as viewed from the side thereof, and FIG. If it is released (the state when the film is fed),
FIG. 3 shows the pressure-bonded state of the film (the state when the film is exposed).

As shown in FIGS. 1 to 3, in the camera of the first embodiment, at least a pair of widthwise ends 10a of the roll-shaped film 10 (broken line) loaded in the camera body 2 are pressed. Of the plate-like member 3 and a plunger 4 composed of an electromagnet or the like which is a driving means for moving the pair of plate-like members 3 in the optical axis direction with respect to the film 10.
On the camera body 2 side, the plate 10 is rotatably arranged at the opposite position to the plate member 3 with the film 10 sandwiched therebetween and outside the exposure range of the film. Roller member 7 sandwiched between 3 and
And the like.

A back cover 1 is rotatably arranged on the back side of the camera body 2 with respect to the camera body 2. On the inner wall surface side of the back cover 1, the plunger 4 is attached to the film 10. They are arranged at positions facing both ends 10a in the width direction.

At each tip of the plunger 4, the pair of plate-shaped members 3 are long in the feeding direction of the film 10 with respect to the optical axis so that the pair of plate-shaped members 3 face both ends 10a in the width direction of the film 10. They are arranged so as to be inclined at an acute angle and form an angle θ with respect to the optical axis. The pair of plate-like members 3 are located at positions facing both ends 10a of the film 10 when the back cover 1 is closed with respect to the camera body 2, that is, at positions indicated by alternate long and two short dashes lines in FIG. It is arranged at (the position indicated by the reference numeral (3)).

On the other hand, the film 10 is sandwiched between the pair of plate-like members 3 outside the exposure range of the film 10, that is, the outer edges of the upper and lower ends of the exposure opening 5 of the camera body 2. The roller member 7 is rotatably disposed at a position inside both end portions 10a of the film 10 and on the front side (that is, the subject side) from the rear end surface of the exposure opening portion 5. 7 is a camera body 2
Are rotatably supported by respective fixed members.

The roller member 7 is provided so as to sandwich the film 10 which is exposed during photography and the like, between the pair of plate-like members 3. Thus, the flatness of the exposed surface of the film 10 is improved and held.

The operation of the camera of the first embodiment having the above-described structure will be described below. First, when the back cover 1 is closed after the roll-shaped film 10 is loaded into the camera body 2, as shown in FIG. 2, the pair of plate-shaped members 3 and roller members 7 Both ends 10a of the film 10 are positioned in between.
Here, when the plunger 4 is in the OFF state, as shown in FIG. 2, a predetermined space is provided between the plate member 3 and the film 10. Therefore, the film 10 is released from the pressure bonding for maintaining the flatness by the plate-shaped member 3.

If the film 10 is, for example, a 120-inch roll film, the backing paper 8 is further placed between the plate-like member 3 and the film 10 ( The state shown in Fig. 2. Hereinafter, Figs.
In FIG. 6, FIG. 8 and FIG. 10, description will be made assuming that a 120-inch roll film having a backing paper is applied. ).

In this state, the film feeding operation is performed by driving the film feeding mechanism (not shown) in the camera body 2. As mentioned above,
Since the film 10 is in a state where the pressing force for maintaining the flatness is released, the film 10 can be smoothly fed without any resistance.

On the other hand, the film feeding operation for one frame of the film 10 is performed, and at the same time, the plunger 4 is turned on by the control means (not shown) arranged in the camera body 2. (ON) state. Then, as shown in FIG. 3, the pair of plate-shaped members 3 are pressed against the peripheral surface of the roller member 7 while sandwiching the film 10 and the backing paper 8 while maintaining the angle of θ. The Rukoto.

At this time, the states of the force applied by the plate member 3 and the force applied to the exposed surface of the film 10 will be described below with reference to FIG. That is, FIG. 4 is an enlarged view of the vicinity of one end portion (10a) in the width direction of the plate member 3 and the film 10 when the plunger 4 is turned on in the camera of the first embodiment. FIG.

As described above, when the plunger 4 is turned on, the plate-like member provided at the tip of the plunger 4 so as to form an angle θ with the optical axis. 3 moves toward the roller member 7 while maintaining the angle θ.

At this time, the plate-like member 3 moves in the optical axis direction,
That is, in FIG. 4, the film 10 and the backing paper 8 are sandwiched by the force in the direction of the arrow X and pressed against the peripheral surface of the roller member 7. Here, the amount of force in the X direction is divided into two directions, the vector X1 direction and the vector X2 direction in FIG. 4, depending on the angle θ formed by the plate member 3 and the optical axis.

When the backing paper 8 exists between the plate-shaped member 3 and the film 10, the backing paper 8 is caused by the frictional force generated between the backing paper 8 and the plate-shaped member 3.
Causes tension in the direction of vector X1 in FIG.
At the same time, due to the frictional force generated between the backing paper 8 and the film 10, tension is also generated in the film 10 in the vector X1 direction in FIG.

Here, the roller member 7 is subjected to a frictional force generated between the peripheral surface of the roller member 7 and the film 10 as shown in FIG.
In the vector X1 direction, that is, in the clockwise direction in FIG. As a result, the film 10 shown in FIG.
It does not hinder the tension in the vector X1 direction at.

Accordingly, the plate-like member 3 is moved in the optical axis direction by the plunger 4, and the film 10 and the backing paper 8 are sandwiched between the roller member 7 and
Tension is applied to both ends 10a of the film 10 and the backing paper 8 in the width direction thereof. As a result, the flatness of the exposed surface of the film 10 is further improved, and this flatness is maintained until the plunger 4 is turned off.

At the same time, the amount of force in the vector X2 direction shown in FIG. 4 becomes a pressing force for pressing the plate member 3 onto the peripheral surface of the roller member 7, and the plunger 4 is turned on. During the state, the film 10
Further, both ends 10a of the backing paper 8 are continuously pressed by the roller member 7.

In this state, that is, the film 1
When the flatness of the exposure surface of 0 is maintained, the shutter release operation or the like is performed on the camera body 2 side,
Photographing or the like is performed by performing the exposure operation.

When the exposure operation is completed in this way, the plunger 4 is turned off by the control means (not shown) arranged in the camera body 2, and the film 10 formed by the plate-like member 3 is turned off. Then, the pressing on the backing paper 8 is released, and the state shifts to the state shown in FIG. Then, the film feeding operation and the like are performed again.

As described above, according to the first embodiment, the pressing force of the plunger 4 in the optical axis direction, that is, the vector X direction in FIG. According to the angle θ formed, the vector X1 in FIG.
Direction and the vector X2 direction, and the force amount in the vector X1 direction is generated at both ends 10a of the film 10 and the backing paper 8 sandwiched between the plate-like member 3 and the roller member 7. Since the tension in the width direction of the film 10 is generated, the flatness of the exposed surface of the film 10 is further improved only by pressing the both end portions 10a of the film 10 by the plate-shaped member 3. You can

That is, the plate-shaped member is moved in the optical axis direction with respect to the film without pressing the entire exposed surface of the film, and both end portions of the film are pressed by the plate-shaped members, whereby tension is applied in the width direction of the film. And the flatness of the exposed surface can be improved.

Further, in the film having the backing paper 8, since the backing paper 8 is also subjected to the tension in the width direction thereof, the 120-type roll, which has the backing paper 8, is disadvantageous in terms of flatness. In a film or the like, it is possible to obtain a better improvement in the flatness of the exposed surface.

When the film feeding operation is performed, the pressing force applied to the film 10 is released, while the pressing force is applied to the film 10 only during exposure.
When feeding the film, scratch the film surface,
Accidents such as causing distortion can be prevented.

In the above description, the case where the backing paper 8 is present, that is, the 120-inch roll film or the like is specifically exemplified, but when the backing paper 8 is not present, For example, 35mm stored in 220 type roll film, 135 type film cartridge
The same effect can be obtained with a roll film or the like.

Further, in the above-mentioned first embodiment, the pair of plate-shaped members 3 are applied as the members for pressing the both end portions 10a of the film 10, but with respect to this plate-shaped member,
Not limited to this, various shapes are conceivable.

That is, FIG. 5 is a schematic view of the back cover of the camera of the second embodiment of the present invention, and FIG. 6 shows the back cover of the camera of the second embodiment in the closed state. FIG. 2 is a central longitudinal cross-sectional view when viewed from the side surface thereof, showing a state where the pressure-bonded state of the film is released (a state when the film is fed). Since the second embodiment basically has the same configuration as that of the above-mentioned first embodiment, the same members are designated by the same reference numerals and the description thereof will be omitted. , As described below.

As shown in FIGS. 5 and 6, the camera of the second embodiment is similar to the camera of the first embodiment described above in the width direction of the roll-shaped film 10 loaded in the camera body 2A. A plate-like member 3A that presses both ends at the same time, a plunger 4A composed of an electromagnet or the like that is a driving means for moving the plate-like member 3A in the optical axis direction with respect to the film 10, and a film with respect to the plate-like member 3A It is formed by a roller member 7 and the like which are rotatably arranged at the opposite positions sandwiching 10 and outside the exposure range of the film, and which sandwiches both ends of the film 10 with the plate-like member 3A. .

That is, in the second embodiment, instead of the pair of plate-shaped members 3 applied to the first embodiment, the pair of plate-shaped members 3 is integrated to form one plate-shaped member. 3A
However, the point that it is moved in the optical axis direction by one plunger 4A is different.

When the back cover 1A of the camera is closed with respect to the camera body 2A, the plate-like member 3A forms an acute angle with the optical axis at positions facing both ends in the width direction of the film. And is bent to form an angle θ with respect to the optical axis.

The plate-like member 3A is disposed at the tip of a plunger 4A, which is a driving means provided on the inner wall surface side of the back cover 1A at the substantially central portion thereof.

The operation of the camera of the second embodiment constructed as described above will be briefly described below. First, when the back cover 1A is closed after the roll-shaped film 10 is loaded into the camera body 2A, as shown in FIG. 6, the space between the plate-shaped member 3A and the roller member 7 is increased, as shown in FIG. Both ends of the film 10 are in a position. Here, when the plunger 4A is in the OFF state, a predetermined space is provided between the plate-shaped member 3A and the film 10, as shown in FIG. Therefore, the pressing force for maintaining the flatness of the film 10 by the plate-shaped member 3A is released.

In this state, the film feeding mechanism (not shown) or the like in the camera body 2A carries out the film feeding operation. At this time, the pressure force applied to the film 10 is released. Therefore, the film 10 can be smoothly fed without any resistance.

On the other hand, at the same time when the film feeding operation of the film 10 is completed, the plunger 4A is turned on. Then, both ends of the plate-like member 3A (both ends bent at an angle of θA) are
The film 10 and the backing paper 8 are sandwiched and pressed against the peripheral surface of the roller member 7.

At this time, the states of the amount of force pressed by the plate-like member 3A and the amount of force applied to the exposed surface of the film 10 are the same as those described in the first embodiment (see FIG. 4).

That is, the plunger 4A is turned on.
In this state, the entire plate-shaped member 3A provided at the tip of the plunger 4A is moved in the optical axis direction, forming an angle θA with respect to both ends of the plate-shaped member 3A, that is, the optical axis. Both ends thus bent move toward the roller member 7.

At this time, the amount of force of the plate-shaped member 3A in the optical axis direction is divided into two directions by the bent both ends (angle θA) of the plate-shaped member 3A.

Therefore, the plate-like member 3A is moved in the optical axis direction by the plunger 4A, and the film 10 is moved.
By sandwiching the backing paper 8 with the roller member 7 between the film 10 and both ends 10 of the backing paper 8
Tension is given to a in the width direction of the film by one component force, whereby the flatness of the exposed surface of the film 10 is improved. This planarity is maintained until the plunger 4A is turned off, and the other component force causes the bent end portions of the plate member 3A to move around the roller member 7. As a pressing force for pressing on the surface, both ends of the film 10 and the backing paper 8 are continuously pressed against the roller member 7 while the plunger 4A is in an ON state. Then, in this state, the shutter release operation or the like is performed, and the exposure operation is performed.

When the exposure operation is completed in this way, the plunger 4A is turned off, the pressing of the film 10 and the backing sheet 8 by the plate member 3A is released, and the state shown in FIG. Transition to. Then, the film feeding operation and the like are performed again.

As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained, and the pair of plate-like members 3 applied in the first embodiment can be obtained. Instead of the plate-shaped member 3
By applying A, it is possible to use only one plunger 4A which is a drive means for moving the plate-shaped member 3A in the optical axis direction. Therefore, the number of members can be reduced to contribute to downsizing of the mechanism, and the complicated control for controlling the two drive means (plungers) performed in the first embodiment described above is not required. This can contribute to the simplification of the mechanism itself.

FIGS. 7 and 8 are views showing a modification of the above-mentioned second embodiment, FIG. 7 is a view showing the outline of the back cover of this camera, and FIG. FIG. 4 is a central longitudinal cross-sectional view of the back cover of the camera when viewed from the side when the back cover is closed, showing a state where the pressure-bonded state of the film is released (a state when the film is fed).

The modification of the second embodiment is different only in that a plate-shaped member 3B is applied instead of the plate-shaped member 3A of the above-described second embodiment. That is, as shown in FIG. 8, the plate-shaped member 3B applied to the camera of this modification is bent so as to be inclined at an acute angle θ with respect to the optical axis at the connection portion with the plunger 4A which is the driving means. The plate-shaped member 3B is moved in the optical axis direction by driving the plunger 4A, so that both widthwise end portions of the film 10 are pressed onto the peripheral surface of the roller member 7. It has become.

In the modified example of the second embodiment having such a structure, the same effect as that of the second embodiment can be obtained.

9 and 10 are views showing another modified example of the above-mentioned second embodiment, FIG. 9 is a view showing an outline of the back cover of this camera, and FIG. , A central longitudinal cross-sectional view of the back cover of the camera when it is closed, showing a state in which the pressure-bonded state of the film is released (a state when the film is fed). There is.

It is to be noted that another modification of the second embodiment is different only in that a plate-shaped member 3C is applied instead of the plate-shaped member 3A of the second embodiment described above. That is, FIG.
As shown in FIG. 0, the plate-shaped member 3C applied to the camera of this another modification has its both ends, that is, the plate-shaped member 3C.
By moving in the optical axis direction, the portions that press both ends in the width direction of the film 10 are formed so as to be inclined at an acute angle θ with respect to the optical axis and have a curved shape. It was done like this.

As a result, the plate-like member 3C is moved in the optical axis direction by driving the plunger 4A, so that both widthwise end portions of the film 10 are pressed onto the peripheral surface of the roller member 7. There is.

In another modification of the second embodiment having such a structure, the same effect as that of the second embodiment can be obtained.

In each of the above embodiments, the plungers 4 and 4A composed of electromagnets are used as the driving means for moving the plate-shaped members 3, 3A, 3B and 3C in the optical axis direction. The drive means may be any means that moves the plate member in the optical axis direction, and the same applies to other means.

[Additional Notes] According to the embodiments of the present invention described in detail above, the following configurations can be obtained. That is, (1) at least a pair of plate-like members which are provided on the case back side so as to face both ends in the width direction of the film and which are long in the feeding direction of the film and inclined at an acute angle with respect to the optical axis, Driving means for moving the plate-shaped member in the optical axis direction with respect to the film, and a roller member rotatably provided at a position opposite to the plate-shaped member with respect to the film and outside the exposure range of the film. And a camera.

(2) In the camera described in Appendix 1,
The plate-shaped member is moved to the film side when the film is exposed.

(3) In the camera described in appendix 1,
The plate-shaped member is moved to a position where the roller member is rotated while sandwiching the film when the film is exposed.

(4) In the camera described in Appendix 1,
The drive means is an electromagnet device.

[0070]

As described above, according to the present invention, when the film surface is exposed, the flatness of the exposed surface of the film is similarly maintained well regardless of the presence or absence of the backing paper. On the other hand, it is possible to provide a camera having a mechanism for preventing an accident such as scratching or distortion of the film surface when the film is fed.

[Brief description of drawings]

FIG. 1 is a rear view showing the outline of a camera of a first embodiment of the present invention, showing a case where a back cover of the camera is in an open state.

FIG. 2 is a central vertical cross-sectional view of the camera shown in FIG. 1 when viewed from the side when the back cover is in a closed state,
The figure which shows the state (the state at the time of film feeding) in which the pressure-bonded state of the film is released.

FIG. 3 is a central vertical cross-sectional view of the camera shown in FIG. 1 when viewed from the side when the back cover is in a closed state,
The figure which shows the pressure-bonded state (state at the time of exposure of a film) of a film.

FIG. 4 is an enlarged cross-sectional view of an essential part of the camera shown in FIG. 1 in which the vicinity of one end portion in the width direction of the plate-shaped member and the film when the drive means for the plate-shaped member is turned on.

FIG. 5 is a diagram showing an outline of a back cover of a camera of a second embodiment of the present invention.

6 is a central longitudinal sectional view of the camera shown in FIG. 5 when the back cover is in a closed state, as viewed from the side surface thereof, in a state where the pressure-bonded state of the film is released (when the film is fed). (State of).

FIG. 7 is a view showing a modified example of the second embodiment of the present invention and is a view showing an outline of a back cover of the camera.

8 is a central longitudinal cross-sectional view of the back cover of the camera shown in FIG. 7 when it is closed, showing a state in which the pressure-bonded state of the film is released (when the film is being fed). (State of).

FIG. 9 is a view showing another modified example of the second embodiment of the present invention, showing the outline of the back cover of the camera.

FIG. 10 is a vertical cross-sectional view of the camera as viewed from the side when the back cover of the camera shown in FIG. 9 is closed, showing a state in which the pressure-bonded state of the film has been released (when the film is being fed). (State of).

FIG. 11 is a view showing a pressure-bonded state of an exposed surface of a film by a pressure plate or the like in a conventional camera, which is a cross-sectional view when cut along a line orthogonal to a film feeding direction.

[Explanation of symbols]

 1, 1A ... back cover 2, 2A, 100 ... camera body 3, 3A, 3B, 3C ... plate-like member 4, 4A ... plunger (driving means) 7 ... roller member 8 ... backing paper 10, 110 ... film

Claims (3)

[Claims] 1. At least a pair of plate-like members which are provided on the case back side so as to face both ends in the width direction of the film, and which are long in the feeding direction of the film and inclined at an acute angle with respect to the optical axis. Driving means for moving the plate-shaped member in the optical axis direction with respect to the film, and a roller member rotatably provided at a position opposite to the plate-shaped member with respect to the film and outside the exposure range of the film. And a camera. 2. The camera according to claim 1, wherein the plate-shaped member is moved to the film side when the film is exposed. 3. The camera according to claim 1, wherein the plate-shaped member is moved to a position where the roller member is rotated while sandwiching the film when the film is exposed.