JPH0635034A - Photographing size switching device for camera - Google Patents

Abstract

PURPOSE:To smoothly rotate a visual field frame for 2nd size and upper and lower light shielding members and also to surely position them. CONSTITUTION:A visual field frame for full size 36A is arranged just in front of an eyepiece 36, a visual field frame for panoramic size 30A is rotatably arranged between an objective lens 38 and the eyepiece 36. And the upper and lower light shielding members 40A and 42A are supported so that they can be rotated between a retreat position where the members are retreated from an optical path and a film is exposed by an aspect ratio of full size and a light shielding position where the upper and lower parts of the film are shielded from light and then the film is exposed by an aspect ratio of panoramic size. And the visual field frame plate for panoramic size 30 is inclined at the full size photographing time so as to reflect the light reflected on the visual field frame for panoramic size 30A outside the optical path and also the upper and lower light shielding members 40A and 42A are positioned on the retreat position, and the visual field frame plate for panoramic size 30 is arranged orthogonal to the optical axis of a finder at the panoramic size photographing time and also the upper and lower light shielding members 40A and 42A are positioned on the light shielding position by using a switching knob 12..., etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera shooting size switching device, and more particularly to a camera shooting size switching device adapted to a camera capable of shooting full size and panoramic size.

[0002]

2. Description of the Related Art Conventionally, a camera capable of shooting full size and panorama size is provided with a shooting size switching device for the camera. The viewfinder of the photographing size switching device of the camera is configured to be able to switch between a full-size field frame and a panoramic size field frame. further,
The camera shooting size switching device is provided with upper and lower light blocking members and can be positioned between a full size shooting position where the upper and lower light blocking members are retracted from the optical path and a panoramic size shooting position where the upper and lower parts of the film are shielded from light. . And
When the upper and lower light blocking members are positioned at the full size shooting position, the film can be exposed at the full size aspect ratio, and when positioned at the panoramic size shooting position, the film can be exposed at the panoramic size aspect ratio. ing.

The field frame of the finder and the upper and lower light-shielding members are interlocked by a switching operation of a switching lever or a switching knob. Therefore, when the photographer switches the switching lever or the switching knob from the panoramic-sized shooting position (“P” position) to the full-size shooting position (“N (normal)” position), the full-size image is taken through the eyepiece of the viewfinder. The field of view frame is viewed at the same time as the subject image. Further, the upper and lower light shielding members are positioned at the full-size photographing position, and the film is exposed at the full-size aspect ratio.

On the other hand, when the switching lever or the switching knob is switched from the "N" position to the "P" position, the panoramic size field frame is observed simultaneously with the subject image through the eyepiece of the finder. Further, the upper and lower light shielding members are positioned at the panoramic size photographing position, and the film is exposed with the aspect ratio of the panoramic size. In this way, the shooting size switching device of the camera for switching between the full-size shooting state and the panorama-size shooting state has the upper and lower field frames and the upper and lower light-shielding members respectively moved in the vertical direction according to the switching operation of the switching lever or the switching knob. A type that slides is used.

[0005]

However, the slide movement type switching device has a problem that the upper and lower visual field frames and the upper and lower light shielding members may not move smoothly in the vertical direction, and the upper and lower visual field frames and the upper and lower visual field members may not move smoothly. There is a problem that the light blocking member cannot be reliably positioned. The present invention has been made in view of the above circumstances, and smoothly moves the field frame and the upper and lower light blocking members according to switching between full-size shooting and panoramic size shooting, and also allows the viewing frame and the upper and lower light blocking members to move. An object of the present invention is to provide a photographing size switching device for a camera capable of reliably positioning members.

[0006]

In order to achieve the above object, the present invention is directed to a camera capable of photographing the first size and the second size, the first size being arranged immediately before the eyepiece. And a second-size field frame rotatably disposed between the objective lens and the eyepiece lens,
A retreat position that is arranged in front of the film and that is retracted from the optical path to expose the film in a first size aspect ratio, and a light shield that shields the top and bottom of the film from light and exposes the film in a second size aspect ratio. The upper and lower light shielding members rotatable between the position and the second size field frame plate when the first size image is captured are tilted to reflect the reflected light of the second size field frame to the outside of the optical path. Along with this, the upper and lower light blocking members are positioned at the retracted position, the field frame plate for the second size is arranged orthogonally to the finder optical axis when the second size image is taken, and the upper and lower light blocking members are positioned at the light blocking position. It is characterized by having a mechanism.

[0007]

According to the present invention, in the camera capable of photographing the first size and the second size, the field frame for the first size is arranged immediately before the eyepiece lens, and the camera for the second size is provided. The field frame was rotatably arranged between the objective lens and the eyepiece lens. Also, the upper and lower light blocking members are arranged in front of the film, and the upper and lower light blocking members are retracted from the optical path to the first
It is rotatably supported between a retracted position where the film is exposed at an aspect ratio of 1) and a light shielding position where the upper and lower sides of the film are shielded to expose the film at an aspect ratio of the second size. Then, the switching mechanism is configured to change the second size when the first size image is captured.
The size of the field frame for the second size is tilted to reflect the reflected light of the field frame for the second size to the outside of the optical path and the upper and lower light shielding members are positioned at the retracted position, and the second size is used for shooting the second size. The size field frame plate is arranged orthogonal to the finder optical axis, and the upper and lower light blocking members are positioned at the light blocking position.

As described above, the field frame for the second size and the upper and lower light shielding members are interlocked with each other to thereby rotate the second frame.
The size of the field frame and the upper and lower light-shielding members can be positioned at the first size shooting position and the second size shooting position, respectively.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a photographing size switching device for a camera according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view of a photographing size switching device for a camera according to the present invention.
Has a switching knob 12. The switching knob 12 is slidably supported in the opening 14A between the "P" position and the "N" position, and the opening 14A is formed in the rear frame 14 of the camera. Then, when the switching knob 12 is positioned at the "P" position and the "N" position, this camera is switched between panoramic size shooting and full size shooting. In addition, in FIG. 1, the switching knob 1
2 is switched to a state in which full-size shooting is possible.

In this state, the field frame plate 30 for panorama size is positioned at a position inclined by 25 °, and
The upper and lower light blocking members 40A and 42A are positioned at positions retracted from the optical path. As a result, the field frame for full size can be seen, and the film can be exposed at the full size aspect ratio. The panoramic field frame plate 30 is integrally formed with a shaft 32, and the shaft 32 is rotatably supported by a camera body (not shown). A half mirror lens 34 is provided in front of the panoramic size field frame plate 30, and
An eyepiece lens 36 is disposed behind the panoramic field frame plate 30. Therefore, the field frame plate 30 for the panorama size has an eyepiece lens 36 and a half mirror lens 34.
Can swing between.

A panoramic field frame 30A and a letter "P" are formed on the rear surface of the panoramic field frame plate 30, and a full size field frame 36A (see FIG. 2) is formed on the front surface of the eyepiece 36. (See) is formed. Also,
As shown in FIG. 2, a reflection film is vapor-deposited on the inner surface 34A of the half mirror lens 34 so as to form a semitransparent concave mirror. This finder constitutes an albada-type bright frame finder.

The field frame plate 30 for panorama size is shown in FIG.
It swings between the full size shooting position indicated by the solid line and the panorama size shooting position indicated by the broken line. When the panoramic size field frame plate 30 is positioned at the full-size shooting position, the light entering from the objective lens 38 illuminates the field frame 36A of the eyepiece lens 36 and the inner surface 34A of the half mirror lens 34. And a virtual image of the full-size field frame 36A is formed at a distance. Then, the virtual image of the field frame 36A shown in FIG. 3 is observed simultaneously with the subject image through the eyepiece lens 36. On the other hand, since the field frame plate 30 is inclined by 25 ° or more, the reflected light of the field frame 30A and the character "P" is reflected out of the optical path, and the field frame 30A and the character "P" are not observed.

Next, when the panoramic size field frame plate 30 is positioned at the panoramic size photographing position, the field frame plate 30 is arranged orthogonal to the optical axis. Then, the field of view frame 30A of the field of view frame plate 30 and the letter "P" are illuminated by the light entering from the objective lens 38, reflected by the inner surface 34A of the half mirror lens 34, and the field of view frame 30A for panoramic size.
And a virtual image of the letter "P" is formed at a distance. Then, the virtual image of the visual field frame 30A and the character "P" is observed by the eyepiece lens 36. In this case, as shown in FIG. 4, the panoramic size field frame 30A and the character "P" and the virtual image of the full size field frame 36A are simultaneously observed.

The upper and lower light blocking members 40A and 42A are
A pair of pins 40B and 4 provided at both ends, respectively.
It is swingably supported by the camera body via 2B. As a result, the upper and lower light blocking members 40A and 42A are positioned at the full-size shooting position retracted from the optical path and the panoramic size shooting position that shields the upper and lower portions of the film. Then, when the upper and lower light shielding members 40A and 42A are positioned at the full-size shooting position, the film can be exposed at the full-size aspect ratio, and when positioned at the panoramic-size shooting position, the film is exposed at the panoramic-size aspect ratio. You can do it.

Next, the case of switching from the full size shooting state of FIG. 1 to the panorama size shooting state will be described. When the switching knob 12 is moved from the “N” position to the “P” position, the leaf spring 1 is moved through the slide plate 16.
8 moves in the direction of arrow P. The slide plate 16 is screwed to the switching knob 12, and a leaf spring 18 is fixed to the slide plate 16. The right end portion of the leaf spring 18 has a bent portion 1 that is bent and protrudes rearward.
8A is formed. When the switching knob 12 moves to the "P" position, the bent portion 18A is positioned at a position where the bent portion 18A has passed over the convex portion 14B formed on the rear frame 14. As a result, the switching knob 12 is held in the “P” position against the biasing force of the spring 20.

Further, the slide plate 16 has an arm 1
When 6A is connected and the arm 16A moves in the direction of arrow P, the lever 22 rotates in the clockwise direction via the pin 22A. A projecting piece 22A is formed on the lever 22, and the projecting piece 22A rotates together with the lever 22 in the clockwise direction. In this case, the projecting piece 22A contacts the upper end of the rod 24 and presses the rod 24 downward. An arm 24A is formed on the rod 24, and the rear end of the lever 25 is in contact with the arm 24A. Therefore, the arm 24
When A moves downward together with the rod 24, the lever 25
Rotates counterclockwise around the pin 25A.
When the lever 25 rotates counterclockwise, the lever 25
Is transmitted to the lever 26 via the spring 25B.

As a result, the lever 26 rotates counterclockwise about the pin 25A. A bent piece 26A is formed at the upper end of the lever 26, and the bent piece 26A is formed.
A is in contact with the upper light blocking member 40A. When the lever 26 rotates counterclockwise, the upper light blocking member 4
OA is pushed down by the bending piece 26A. Therefore, the upper light shielding member 40A swings downward against the biasing force of the spring 44A and is positioned at the panoramic size photographing position.

The lever 26 has a slot hole 26B formed therein, and a pin 27A is movably supported in the slot hole 26B. The pin 27A is formed integrally with the lever 27. Therefore, the lever 27 rotates in the clockwise direction against the biasing force of the spring 27B at the same time as the lever 26 rotates in the counterclockwise direction. In this case, the rotation center of the lever 27 is the pin 27C.

A bent piece 27D is formed at the lower end of the lever 27, and the bent piece 27D is located below the light shielding member 42A.
Is in contact with. When the lever 27 rotates in the clockwise direction, the lower light shielding member 42A is pushed upward by the bending piece 27D. Therefore, the lower light blocking member 4
2A swings upwards against the urging force of the spring 46A,
It is positioned at the panoramic size shooting position.

On the other hand, when the arm 16A moves in the direction of arrow P, the lever 28 rotates in the clockwise direction, and at the same time, the lever 28 rotates in the clockwise direction about the pin 28A. As a result, the protruding piece 28B of the lever 28 retracts from the contact position with the lower end of the lever 39, so that the lever 3
9 is rotated clockwise about the shaft 32 by the urging force of the spring 39B. Therefore, the panoramic size field frame plate 30 is positioned at the panoramic size photographing position.

The field frame plate 30 for panorama size
When the camera is positioned at the panoramic size photographing position, the projecting piece 28B of the lever 28 retreats to a position separated from the lower end of the lever 39, so that the panoramic size field frame plate 30 is securely operated by the biasing force of the spring 39B. It is positioned at the panoramic size shooting position. Then, when switching from the panoramic size shooting state to the full size shooting state, when the switching knob 12 is moved from the “P” position to the “N” position, the arm 16A retracts to the position separated from the lever 22. To do. Therefore, the upper and lower light blocking members 40
A and 42A are reliably positioned at the full-size shooting position by the biasing forces of the springs 44A and 46A, respectively. further,
When the switching knob 12 is moved from the “P” position to the “N” position, the arm 16A retracts to the position separated from the lever 28. Therefore, the lever 28 rotates counterclockwise by the urging force of the spring 28C. In this case, spring 28C
Since the urging force of the lever is larger than the urging force of the spring 39B, the lever 28 rotates in the counterclockwise direction even after the protruding piece 28B and the lower end portion of the lever 39 contact each other. This allows lever 3
9 rotates counterclockwise until it reaches a predetermined inclination angle (25 ° or more). Then, when the lever 39 is rotated up to a predetermined inclination angle (25 ° or more), the stopper 39A abuts on the stopper of the camera body, and the lever 39 is positioned for panoramic image capturing.

In FIGS. 3 and 4, 36B is a field frame for parallax correction during short-distance shooting, and 36C is a target mark. That is, when performing full-size shooting, the composition is determined so that the subject is within the visual field frame 36A, and during short-range photography, the composition is determined so that the subject does not enter above the visual field frame 36B. In the case of shooting, the composition is determined so that the subject enters the field frame 30A.

In the embodiment of the present invention, the first size is the full size and the second size is the panoramic size. However, the second size may be a half size, a cine size or a high definition size. Further, the first and second sizes may be appropriately selected from full size, panorama size, half size, cine size, and high definition size.

[0024]

As described above, according to the photographing size switching device for a camera of the present invention, when photographing the first size, the second size field frame plate is rotated to the predetermined tilt position to move the second size. It is possible to reflect the reflected light of the field frame for the above size to the outside of the optical path and rotate the upper and lower light shielding members to the retracted position to retract from the optical path to expose the film with the first size aspect ratio. Further, at the time of photographing the second size, the field frame plate for the second size is rotated so as to be arranged orthogonal to the finder optical axis, and the upper and lower light blocking members are rotated to the light blocking position to block the upper and lower portions of the film. Then, the film can be exposed with the aspect ratio of the second size. In this way, by rotating the second size field frame and the upper and lower light blocking members in conjunction with each other, the second size field frame and the upper and lower light blocking members are respectively photographed in the first size. The position and the second-size shooting position can be set.

Therefore, in response to the switching between the first size shooting and the second size shooting, the field of view frame for the second size and the upper and lower light shielding members are smoothly rotated, and
The field frame for the second size and the upper and lower light blocking members can be reliably positioned.

[Brief description of drawings]

FIG. 1 is a perspective view of a photographing size switching device of a camera according to the present invention.

FIG. 2 is a side view of an albada-type bright frame finder used in the shooting size switching device of the camera according to the present invention.

FIG. 3 is a plan view showing a field frame of the albada-type bright frame finder shown in FIG. 2 during full-size shooting.

FIG. 4 is a plan view showing a field-of-view frame at the time of panorama size photography of the albada-type bright frame finder shown in FIG.

[Explanation of symbols]

 10 ... Camera size switching device 12 ... Switching knobs, etc. (switching mechanism) 30 ... Panorama size field frame plate 30A ... Panorama size field frame 36 ... Eyepiece 36A ... Full size field frame 38 ... Objective lens 40A, 42A ... Shading member

Claims (1)

[Claims] 1. A camera capable of taking images of the first size and the second size, wherein a field frame for the first size, which is arranged immediately before the eyepiece lens, and between the objective lens and the eyepiece lens. A field frame for the second size that is rotatably disposed, a retracted position that is disposed in front of the film and that retracts from the optical path and exposes the film at the aspect ratio of the first size, and The upper and lower light blocking members that are rotatable between a light blocking position where the upper and lower parts are shielded and the film is exposed with the aspect ratio of the second size, and the second size field frame plate is tilted when shooting the first size. To reflect the reflected light of the second size field frame to the outside of the optical path and to position the upper and lower light shielding members at the retracted position, and the second size field frame plate is used for finder at the time of photographing the second size. Arranged orthogonally to the optical axis and shield the upper and lower light blocking members Camera recording size switching apparatus characterized by comprising: a switching mechanism, the positioning to the position.