JP3122944B2 - Screen size switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus provided in a camera body for photographing an image such as a panoramic screen, for example, a special screen divided in a shape different from a standard screen, and capable of switching the screen size. Things.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application No. 2-278335.
In the screen size switching apparatus disclosed in Japanese Patent Application Laid-Open No. H11-157, two upper and lower light shielding members and a driving member for changing the position and angle of the light shielding members are constituted by a plurality of members. Also, for example, in a switching device in a panorama switching camera disclosed in Japanese Patent Application Laid-Open No. 6-95244, a photographing opening that defines a panoramic photographing screen in the center is bent in the direction of the short side substantially at the center of the long side. Using a photographic screen mask member provided with a section, a normal full-size photographic screen is obtained when the image is bent at the bending portion, and a panoramic image is displayed when the image is not bent. Further, a configuration in which many links are connected as transmission means for this switching operation is shown.

[0003]

In the conventional apparatus described in the first aspect, the upper and lower light shielding members and the driving member are composed of a plurality of members, and they are combined to form a complicated structure. Further, there is a problem that the interlock between the driving member and the light shielding member is not matched, and an error occurs. Further, in the conventional apparatus described in the second aspect, since the switching is performed by bending or not bending the photographing screen mask member at the bending portion, a large space is required in the optical axis direction, that is, the depth direction. The means also has a problem of a complicated structure.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the error of interlocking with a simple structure, eliminate the need for a space in the depth direction, and make it possible to reliably and easily switch the screen size.

[0005]

In order to achieve the above-mentioned object, a light-shielding member having a light-shielding portion which is positioned in parallel and a connecting portion which connects both ends of both light-shielding portions is provided substantially integrally. It is folded back and supported by the connecting portion, and both light-shielding portions are positioned at an interval parallel to each other to form an opening facing the photographing screen, and the operating member moves the two light-shielding portions parallel to or away from each other along the photographing screen in parallel. The distance between the two light-shielding portions is changed, and the opening is switched between the first screen size and another screen size. Such a substantially integrated light-shielding member can eliminate an error in interlocking the two light-shielding portions by the operating member, and can be moved along the photographing screen, thereby eliminating a space in the depth direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A screen size switching apparatus according to the present invention has a light-shielding portion substantially integrally provided with a light-shielding portion positioned opposite and parallel to each other and a connecting portion connecting both ends of both light-shielding portions. The light-shielding member is folded back and supported by the connecting portion, so that the two light-shielding portions are positioned in parallel with an interval therebetween to form an opening facing the photographing screen. There is also provided an operating member for operating the light shielding member such that the two light shielding portions located in parallel approach or separate in parallel along the photographing screen to change the interval between the two light shielding portions. By parallel movement of the two light-shielding portions, the opening is switched to the first screen size when the two light-shielding portions are separated from each other, and the opening is switched to another screen size when the two light-shielding portions approach.

In the light-shielding member, the light-shielding portion and the connection portion may be substantially integrally formed as separate members.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to the drawings. FIG. 1 shows a state of shooting with a normal screen size as a first screen size, and FIG. 2 shows a state of shooting with another screen size. FIG. 3 is a diagram illustrating a state of shooting. FIG. 3 is a development view of the light shielding member.

First, the configuration of the light shielding member 1 will be described in detail with reference to FIG. The light-shielding member 1 has two vertically
The two ends of the two light shielding portions 1a and 1b are connected to the connection portions 1e and 1f.
And are formed substantially integrally with each other. The whole is in a rectangular shape, and the central portion is a wide opening. The left and right connecting portions 1e and 1f are provided with long guide grooves 1c and 1c on the side near the light shielding portion 1a and short guide grooves 1c and 1c on the side near the light shielding portion 1b. At both ends of the upper light shielding portion 1a, spring hooks 1d are provided.

When the light-shielding member 1 is mounted in the camera body, as shown in FIG. 1, left and right connecting portions 1e and 1e of the light-shielding member 1 are mounted on shafts 2 and 2 provided on the camera body side.
1f is supported in a folded state, and six guide pins 3 penetrating four guide grooves 1c are fixed to the camera body side. Also, the other ends of the springs 4 and 4 whose one ends are fixed to the camera body side are hooked on the spring hooks 1d and 1d. An operating member 50 is connected to the light shielding member 1. The N state of the operating member 50 is a state in which the light shielding member 1 is locked at a lower position by a locking member (not shown), and the P state is such that the locking is released and the light shielding member 1 can be moved by the urging force of the spring 4. It is in a state to do. When the light-shielding member 1 is thus mounted in the camera body, the upper side of the light-shielding portion 1a above the light-shielding member 1 in FIG. 3 becomes the lower side of the light-shielding portion 1a in FIG. .

Therefore, when photographing with a normal screen size, the operating member 50 is rotated to the N state as shown in FIG. For this reason, the light-shielding member 1 is lowered at the light-shielding portion 1b against the spring 4, and the guide pin 3 is locked at the upper end of the lower guide groove 1c to restrict further lowering, thereby maintaining the lowered position. The light-shielding portion 1a relatively slides at the portion turned back by the shafts 2 and 2 and rises by a half of the above-described lowering. For this reason, the light shielding portion 1a
The opening formed between the lower side of the light-shielding portion 1b and the upper side of the light-shielding portion 1b is large (the vertical interval is large), and all four sides of the light-shielding member 1 are located outside the opening of the normal screen size 100.
When the image is taken in the state of the opening, it is possible to take an image of a normal screen size.

Next, when photographing another screen size, for example, a panoramic screen size, the operating member 50 is rotated to the P state as shown in FIG. For this reason, since the light blocking member 1 is unlocked and is movable,
The light shielding portion 1a is lowered by the urging force of the spring 4,
The light shielding portion 1b relatively rises. The rise of the light shielding portion 1b is stopped at the position where the guide pin 3 is locked at the lower end of the lower guide groove 1c, and the spring 4 is prevented from moving by the urging force. You. The normal screen size 100
And the lower part of the normal screen size 100 is covered by the rise of the light-shielding portion 1b. At the time of movement, the guide pin 3 fixed at a fixed position slides through the guide groove 1c, so that the light shielding member 1 does not shift in the left-right direction in the direction in which the light shielding portions 1a and 1b approach each other. Slide. Due to this movement, the opening formed between the lower side of the light-shielding portion 1a and the upper side of the light-shielding portion 1b becomes smaller (the vertical interval becomes smaller), and the width ratio is much larger than that of the normal screen size 100. The screen size 100a is opened. When taking a picture in the state of this opening, it becomes possible to take a picture of another screen size (panoramic screen size).

Next, in order to return to the normal screen size from another screen size, the operating member 50 is rotated to return to the N state. The light-shielding portion 1b of the light-shielding member 1 is pulled downward against the urging force of the spring 4, and the light-shielding portions 1a and 1b slide away from each other and move out of the opening of the normal screen size 100 as shown in FIG. I do. Here, the light shielding member 1 is locked by a locking member (not shown).

According to this embodiment, since the light-shielding portions 1a and 1b which are positioned opposite and parallel to each other are integrally formed, no error occurs when moving. Also, since they move relatively in the opposite direction, the amount of movement becomes equal,
Naturally, the center between the normal screen size and the panorama screen size coincides. Further, since the movement of the light shielding portions 1a and 1b moves in parallel along the photographing screen, no space is required in the optical axis direction of the camera, that is, in the direction orthogonal to the screen.

[0015]

In another embodiment shown in FIG. 4, in the light shielding member, the light shielding portions 1a and 1b in the above embodiment are formed by light shielding pieces 11a and 11b which are separate members. Both ends of the pieces are connected by connecting pieces 12 and 12 as connecting members, and are formed substantially integrally. The other parts are substantially the same as those of the above-described embodiment, and are denoted by the same reference numerals. The switching operation is the same as described above.

In any of the embodiments, the state switched by the operating member 50 is not limited to two states. For example, three states N, S, and P may be used.
In this state, a locking member (not shown) is provided to enable locking. As a result, the N state is set to the normal screen size, the S state is set to the other first screen size, and the P state is set to the other second screen size.

In each of the above embodiments, the movement of the light-shielding portion is described as moving in the vertical direction (vertical direction) along the photographing screen. However, the present invention is not limited to this. The portion may be slid in the horizontal direction (left / right direction) parallel to the shooting screen.

[0018]

According to the present invention, since the light-shielding portion of the light-shielding member approaches or separates along the photographing screen, the amount of movement of the light-shielding portion operates equally, there is no interlocking error, and the screen size can be switched with certainty. Easy. Since both light-shielding portions move in parallel along the photographing screen, a space in the depth direction can be made unnecessary, and the thickness can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of an embodiment of the present invention, showing a time of shooting with a normal screen size.

FIG. 2 is a front view of a main part of the embodiment of the present invention, showing a time of shooting with another screen size.

FIG. 3 is a development view of the light shielding member of the present invention.

FIG. 4 is a front view of a main part of another embodiment of the present invention, showing shooting at a normal screen size.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light-shielding member 1a, 1b Light-shielding part 1e, 1f Connection part 11a, 11b Light-shielding part (light-shielding piece) 12 Connection part (connection part) 50 Operating member 100 First screen size 100a Other screen size

Claims (2)

(57) [Claims] 1. A light-shielding member having a light-shielding portion substantially opposed to and parallel to each other and a connecting portion connecting both ends of the two light-shielding portions substantially integrally provided. By being folded back and supported by the connecting portion, the two light-shielding portions are positioned in parallel at an interval to form an opening facing the shooting screen, and the two parallel light-shielding portions are parallel along the shooting screen. An actuating member is provided to actuate the light shielding member so that the distance between the two light shielding portions is changed by approaching or moving away from the light shielding portion. The parallel movement of the two light shielding portions causes the opening when the two light shielding portions are separated from each other. A screen size switching device, wherein the opening is switched to another screen size when approaching the first screen size. 2. The screen size switching device according to claim 1, wherein the light-shielding member is configured such that the light-shielding portion and the connection portion are substantially integrally formed by separate members. .