JPH1195285A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of surely fixing a special-sized visual field frame such as a panoramic-sized frame which is easily affected by the positional deviation of the visual field frame to a fixed position. SOLUTION: As for the camera provided with a visual field frame adaptable to a panoramic size, the camera is provided with a fixed mask 8 which is fixed so as to be nearly aligned with an image forming plane where an object image is formed, a switching mask 18 which is made rotatable behind the fixed mask 8, and a boss 7c capable of locking the rotation of the switching mask 18. And the panoramic-sized visual field frame is formed by overlapping the fixed mask 8 and the switching mask 18, and when the switching mask 18 is locked by the boss 7c, the switching mask 18 is always fixed to such the position that the panoramic-sized visual field frame may be formed 10 a state that the mask 18 and the mask 8 overlap each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera provided with a field frame in a finder optical system.

[0002]

2. Description of the Related Art Since a finder image projected on a finder of a camera is to be confirmed by a user as a subject image photographed at the time of photographing, the finder image and an image of a printed photograph obtained after photographing are highly accurate. Are configured to match. The viewfinder optical system of the camera is provided with a field frame that limits the range of the subject image so that the same viewfinder image as the image obtained after shooting is obtained.When the position of this field frame changes, it is reflected on the viewfinder. Since the range of the subject image changes, the field frame is accurately fixed at a predetermined position.

[0003]

By the way, recently, a special size such as a panoramic size (aspect ratio 1: 3) having an aspect ratio different from the conventional classical size (aspect ratio 2: 3) has been recently developed. Possible cameras are being developed. In a size with a narrow width in one direction, such as this panorama size, even if the difference between the viewfinder image and the captured image is slight, the difference is easy to be recognized by the photographer. In addition, the field frame must be accurately fixed. If the camera is capable of capturing only the panorama size, the field of view corresponding to the panorama size may be fixed, so that the problem due to the relative displacement is less likely to occur. However, in the case of a camera capable of shooting a size other than the panorama size, the camera has a structure in which a plurality of view frames corresponding to each size are provided, and the view frames are switched according to the shooting size. For this reason, since the field frame or the member forming the field frame is configured to be movable, there is a possibility that the position of the field frame is shifted each time the field frame is switched according to the shooting size, and as a result, the finder image is captured. There is a possibility that the image is shifted with respect to the image to be reproduced.

An object of the present invention is to enable photographing of a special size such as a panorama size in which the influence of positional displacement of the field frame is likely to occur, and a field frame corresponding to such a size or a member forming the field frame is provided. Even if the camera is movable, we provide a camera that can reliably fix the field of view corresponding to such a size at a certain location so that the viewfinder image always matches the captured image with high accuracy Is to do.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides a finder optical system in which a finder image is the same as a printed photograph obtained after photographing. In a camera provided with a field frame that limits the range of the subject image, a fixed frame that is fixed so as to substantially coincide with the image forming plane on which the subject image is formed, and a front or a rear of the fixed frame. A movable frame that is movable, and a locking member that can lock the movement of the movable frame; the visual field frame is formed by overlapping the fixed frame and the movable frame; When being locked by the locking member, the movable frame is fixed at a position where the visual field frame is formed so as to overlap with the fixed frame.

According to the first aspect of the present invention, a field frame for limiting the range of the subject image is provided in the viewfinder optical system so that the viewfinder image becomes the same image as a print photograph obtained after photographing. In the camera, the field frame is formed by overlapping a fixed frame fixed so as to substantially coincide with an image forming plane on which a subject image is formed, and a movable frame movable in front or behind the fixed frame, When the movable frame is locked by the locking member, the movable frame is fixed at a position where the visual field frame is formed so as to overlap the fixed frame.

Therefore, the field frame formed by the overlapping of the movable frame and the fixed frame is also fixed at a substantially fixed position. Even if the fixed frame and the moving frame are used to form a specially sized field of view such as a panorama size that is likely to be affected by misalignment, the field of view and the viewfinder image are It is possible to reliably fix at a certain position so that they match with high accuracy. Here, the frame formed as the fixed frame may be a single frame or a frame that becomes one visual field frame. In this case, in the camera of the present invention, the moving frame does not overlap the frame formed on the fixed frame, and the frame is used alone as the visual field frame, and the fixed frame and the moving frame overlap with each other to provide another visual field. What is necessary is just to provide a field frame switching mechanism that can switch between a state in which the frame is formed and a state in which the frame is formed.

According to a second aspect of the present invention, in the camera according to the first aspect, an elastic member for urging the moving frame is provided so as to be locked by the locking member. In the vicinity of the locking member, the movable member is moved only by the urging force of the elastic member and locked by the locking member.

According to the camera of the second aspect, the movable frame is moved only by the urging force of the elastic member and is locked to the locking member in the vicinity of the locking member. Therefore, when the moving frame is always locked by the locking member, the moving frame always moves only by the urging force of the elastic member. Therefore, the camera of the present invention has a mechanism for moving the moving frame independently of the urging force of the elastic member. Even if it does, the position locked by the locking member is always fixed without being affected by the accuracy or the like of such a mechanism. The field frame composed of the fixed frame and the field frame is also fixed at a substantially fixed location. Even if the field frame consisting of the fixed frame and the moving frame has a special shape such as a panorama size,
This field frame is securely fixed so that the viewfinder image matches the image to be shot with high accuracy. The elastic member refers to a member that elastically deforms, such as a spring or a rubber member.

According to a third aspect of the present invention, in the camera according to the second aspect, there is provided a gear mechanism for driving the moving frame so that the moving frame moves in front of or behind the fixed frame, When the moving frame is moved to a predetermined position near the locking member by the gear mechanism so as to be locked by the locking member, the gear mechanism does not restrict the movement of the moving frame, and The frame is configured to be moved only by the urging force of the elastic member and locked by the locking member.

According to the third aspect of the present invention, the moving frame is driven by the gear mechanism so as to move in front of or behind the fixed frame, but the moving frame is locked by the locking member. When the gear mechanism stops moving to a predetermined position in the vicinity of the locking member, the gear mechanism does not restrict the movement of the moving frame, and the moving frame moves only by the urging force of the elastic member and is locked by the locking member. The position where the movable frame is locked by the locking member is constant without being affected by the accuracy of the operation of the mechanism or the like. Here, "the movement of the moving frame is not restricted" means that when the moving frame moves to a predetermined position near the locking member, the operation of the gear mechanism stops, and a part of the gears constituting the gear mechanism. Missing tooth or 1
The lack of one tooth prevents direct or indirect action on the moving frame.

According to a fourth aspect of the present invention, in the camera according to any one of the first to third aspects, the movable frame is provided with a notch portion capable of contacting the locking member. Features.

According to the camera of the fourth aspect, the movable frame can be locked by the locking member at the notch.
In addition, since the moving frame is partially cut out and locked by the locking member, the entire moving frame can be formed compact.

According to a fifth aspect of the present invention, there is provided the camera according to any one of the first to fourth aspects, wherein:
A transmission plate is provided so as to be parallel to the imaging plane, the fixed frame is attached to the transmission plate, the locking member is an eccentric pin, and the eccentric pin is locked to the eccentric pin. The adjusted moving frame may be overlapped with the fixed frame and adjusted so as to form the visual field frame, and then attached to the transmission plate. The eccentric pin is composed of a disc and a rod-shaped pin that is a rotating shaft that is erected at a position deviated from the center of the disc, and is rotated by a jig or the like to rotate the disc. The position of the board
It can be changed around a pin.

According to the camera of the fifth aspect, the locking member is an eccentric pin, and the eccentric pin has a movable frame previously locked to the eccentric pin overlapping the fixed frame to form a field frame. After being adjusted so that it can be mounted on the transmission plate, the position of the eccentric pin is adjusted at the stage of assembling the camera. Field of view consisting of
The finder image can be reliably fixed to a certain location so as to match with a captured image with high accuracy.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera according to the present invention will be described below with reference to FIGS. This camera is
Prints in three sizes: a high-definition size with an aspect ratio of 9:16, a classical size that is a conventional general photo size with an aspect ratio of 2: 3, and a panorama size with an aspect ratio of 1: 3. Uses a film that can be photographed and has a film format according to the Advanced Photo System (APS).
In the case of this film, photographing is performed in a high-vision size corresponding to the full size of the film, and a desired size is magnetically recorded on the film for each photographing, and the film is printed at that size at the time of printing.

The finder of this camera can project a finder image having the same aspect ratio as the above three sizes so as to correspond to the size of the print photograph. For this purpose, in this camera, the viewfinder optical system has three view frames having the same aspect ratio as the three sizes, and when the photographer specifies the size of the print photograph desired, the view field is switched to the view frame of the corresponding size. It has a frame switching mechanism. Further, a field frame positioning mechanism is provided for particularly accurately matching the panorama size finder image with the image to be printed, and when the field frame switching mechanism is switched to the field frame corresponding to the panorama size, the field frame positioning mechanism is used. A deviation or the like does not easily occur in an image to be printed.

First, the configuration of the camera will be described. FIG. 1 shows an example of the camera of the present invention, and is an exploded perspective view of each member constituting a view frame switching mechanism 1 provided in the camera body. This view frame switching mechanism 1
Switches the field of view using a gear mechanism. The operation knob 2, the click member 3, the connecting lever 4, the gear 5,
It is constituted by the gear 6 and the projections 9c and 9d of the mounting plate 9. The connecting lever 4 is the finder case 1
The gear 5 and the gear 6 are housed in the finder case 10. The finder case 10 is a box having a predetermined shape and size, which does not hinder necessary movement of each member in the case 10.

The mounting plate 9 is fixed to the camera body 20 so as to be adjacent to the finder case 10 and substantially parallel to the side surface of the camera body 20. A cylindrical cylindrical boss 9a is erected on the upper part of the mounting plate 9, and a mounting hole 9b is defined by the cylindrical boss 9a. The mounting plate 9 is thicker below the cylindrical boss 9a and has a step. The upwardly facing surface formed by the step is a curved surface 9f having substantially the same curvature as the outer peripheral surface of the extending portion 14 of the click member 3 described later. Two projections 9c and 9d are formed continuously at the left end of the curved surface 9f. And these two projections 9c and 9d
A recess 9e is formed between them.

In this camera, a photographer can operate the operation knob 2 to take a photograph so as to obtain three sizes of print photographs. Operation knob 2
As shown in FIG. 1 and FIG. 2, a disk-shaped plate portion 2a,
A knob 2b extending downward from the plate 2a;
a protruding from the back surface, and is substantially cylindrical and has a groove 2d at the tip.
Is cut off. A notch (not shown) is formed in the groove 2d so that a not-shown claw (not shown) of the E-ring 11 can be fitted therein. Plate part 2
From the back surface of a, the two engaging portions 2e, 2e are erected so as to oppose each other in the vertical direction. Operation knob 2
Is mounted on the side surface of the camera body 20 by fitting the protrusion 2c into the mounting hole 9b of the mounting plate 9 with the knob 2b facing downward and the plate 2a and the knob 2b exposed outside. ing. Then, as shown in FIG. 3, an E-shaped E-ring 11 is provided around the groove 2d exposed from the back surface of the mounting plate 9, and a not-shown claw formed on the E-ring 11 at a not-shown cut in the groove 2d. By inserting the operation knob 2 in the inserted state, the operation knob 2 is rotatable with respect to the mounting hole 9b and is prevented from falling out of the mounting hole 9b. Further, the engaging portions 2e, 2e of the operation knob 2
Are the fitting portions 12 of the click member 3 described later,
Twelve.

The click member 3 is substantially disk-shaped, and has a through hole 3a in the center thereof into which the outer peripheral surface of the cylindrical boss 9a of the mounting plate 9 is fitted. Fitting portions 12, 12 into which the above-mentioned engaging portions 2e, 2e can be fitted are formed at positions vertically opposed to the peripheral portion of the through hole 3a.
Further, a side hole 13 is formed in a peripheral portion of the through hole 3a so that the engaging pin 4c at the tip of the connecting lever 4 can be engaged.
A substantially fan-shaped extending portion 14 extending in the radial direction is formed at the lower portion of the click member 3, and the elongated portion 14 has a long hole 14 defined by a curved surface having substantially the same curvature opposite thereto.
a is provided. Further, a claw portion 14b is formed on a peripheral edge portion of the extension portion 14 so as to protrude in a radial direction and can be engaged with the concave portion 9e. A thin portion 14c is formed between the elongated hole 14a and the claw portion 14b, and the thin portion 14c is
When the tip 4b is pressed from its tip toward the elongated hole 14a with a predetermined force or more, the tip 4b can be elastically deformed. The click member 3 is engaged with the engaging portion 2 of the operation knob 2 in a state where the outer peripheral surface of the cylindrical boss 9a is fitted into the through hole 3a.
By engaging the fittings 12 and 12 with the fitting portions 12 and 12, the fittings 12 and 12 are attached to the attachment plate 9 so as to be rotatable integrally with the operation knob 2 around the cylindrical boss 9 a. Further, the detection pin 1
5 project upward. The detection pin 15 can be engaged with the holding portion 16 b of the detection switch 16, and rotates with the rotation of the click member 3.

Then, corresponding to the movement of the operation knob 2,
The click member 3 is configured to operate as follows. When the knob 2b of the operation knob 2 is oriented vertically (C in FIG. 1), the claw 1 of the click member 3
4b, as shown in FIG.
Is engaged. At this time, the claw portion 14b is
The rotation of the click member 3 is stopped by abutting on c and 9d, and the click member 3 is positioned at this position. That is, the click member 3 is
The locking means including the projections 4b and the projections 9c and 9d fixes the rotation position shown in FIG. 5B.

When the operation knob 2 is to be rotated counterclockwise from the state shown in FIG. 5B, the click member 3 is also trying to rotate, and at this time, the claw portion 14b is pushed by the projection 9c and the entire rotation is performed. Is locked so that a load is applied to the operation knob 2. When the operation knob 2 is further rotated against the load, the thin portion 14c is elastically deformed inward while the claw portion 14b is pressed by the projection 9c. The claw 14b
Gets over the protrusion 9c, and the click member 3 rotates,
In the state of FIG. 1A, the operation knob 2 is located at P in FIG. Once the claw portion 14b has climbed over the protrusion 9c, the click member 3 cannot be rotated clockwise and returned by the locking means including the claw portion 14b and the protrusion 9c, and as described later. Since the click member 3 is locked by the engagement pin 4c and cannot be further rotated in the counterclockwise direction, the click member 3 has the claw portion 14b in contact with the right side surface of the projection 9c in FIG. It is adapted to be fixed at the rotational position shown in a). When the operation knob 2 is rotated clockwise by applying a force greater than the force by which the thin portion 14c is elastically deformed, the click member 3 returns to the state shown in FIG. 5B.

Conversely, when the operation knob 2 is operated to rotate clockwise from the state shown in FIG. 5B, the click member 3 also attempts to rotate together.
b is pushed by the projection 9d and the entire rotation is locked, so that a load is applied to the operation knob 2. When the operation knob 2 is further rotated against the load, the claw portion 14b is pushed by the projection 9d. The thin portion 14c is elastically deformed inward,
The claw portion 14b rides over the projection 9d, the click member 3 rotates to the state shown in FIG. 5C, and the operation knob 2 is positioned at H in FIG. Once the claw portion 14b gets over the protrusion 9d, the click member 3 cannot be rotated counterclockwise and returned by the locking means including the claw portion 14b and the protrusion 9d, and will be described later. In addition, since the click member 3 is locked by the engagement pin 4c and cannot be further rotated clockwise, the click member 3 has the claw portion 14b abutting on the left side surface of the projection 9d in FIG. It is fixed at the rotational position shown in c). When the operation knob 2 is rotated counterclockwise by applying a force greater than the force that causes the thin portion 14c to elastically deform, the click member 3 returns to the state shown in FIG. 5B.

That is, the click member 3 is provided with the claw portion 14b.
Are fixed at any of three rotational positions, such as in the recess 9e, on the right side of the projection 9c, and on the left side of the projection 9d.

The connecting lever 4 has a rod-shaped shaft portion 4a and a front plate 4 which is formed at the tip thereof and is orthogonal to the longitudinal direction of the shaft portion 4a.
b and an engaging pin 4 erected at the end of the front plate 4b.
c. In the connecting lever 4, the longitudinal direction of the shaft portion 4a is substantially parallel to the optical axis of the light incident on the prism P2 from the prism P1, which will be described later. Is rotatably fixed to the finder base plate 17. FIG.
As shown in FIG. 3, the front end protrudes from the finder case 10 while being supported by a wall (not shown) defining the finder case 10 so as not to hinder rotation.

The engaging pin 4c is engaged with the side hole 13 of the click member 3, as shown in FIG. Therefore, when the click member 3 rotates counterclockwise from the state shown in FIG. 5B to the state shown in FIG. 5A, the engaging pin 4c is moved downward, and the connecting lever 4 as a whole is It rotates clockwise around the portion 4a. However, the click member 3 is moved by the operation knob 2 as shown in FIG.
Even if the user tries to rotate further in the counterclockwise direction than the state shown in FIG.
The click member 3 is prevented from rotating further in the counterclockwise direction. Also,
Conversely, when the click member 3 rotates clockwise from the state of FIG. 5B to the state of FIG.
Is moved upward, and the connecting lever 4 as a whole is
It rotates counterclockwise around a. However, even if the click member 3 is further rotated clockwise from the state shown in FIG. 5C by the operation knob 2, the click member 3 is locked by the engagement pin 4c in the same manner as described above, so that the click member 3 is further rotated clockwise. Rotation is prevented.

A gear 5 is attached to a rear portion of the connecting lever 4 so as to be rotatable integrally with the connecting lever 4. The gear 5 meshes with the gear 6, and the uppermost tooth 5a lacks a tip (FIG. 7). Gear 6
Is mounted so as to rotate together with the shaft 19 with respect to a shaft 19 which is parallel to and separated from the shaft portion 4a of the connecting lever 4 and penetrates the finder base plate 17 in a rotatable state. Therefore, when the rotation of the gear 5 is transmitted, the gear 6
9 and, conversely, when the shaft 19 rotates, it also rotates.

When the connecting lever 4 rotates clockwise about the shaft portion 4a, the gear 5 rotates together clockwise.
The gear 6 rotates counterclockwise. Here, when the operation knob 2 is rotated to the position P as described above, the gear 5 and the gear 6 are rotated by the torque transmitted to the connection lever 4 via the click member 3 as shown in FIG. The gear 5 rotates until the right side of the teeth 5 a comes into contact with the teeth of the gear 6. Since the tooth 5a lacks its tip and is short, the left side of the tooth 5a has a gap 2 between the tooth 5a and the gear 6.
1 results. Due to the gap 21, the rotation of the gear 6 in the counterclockwise direction is not restricted by the gear 5. When the connecting lever 4 rotates counterclockwise about the shaft 4a, the gear 5 also rotates counterclockwise, and the gear 6 rotates clockwise.

As described above, this camera can obtain a print photograph of a high-vision size, a classical size, and a panorama size, but the photographing is performed in the high-vision size. When the panorama size is designated and photographed, the horizontal length of the photographed high-definition size image is kept as it is, and the vertical length becomes one when the horizontal length is set to three. The image is printed with the top and bottom of the image cut at the same width. If you shoot with the classical size specified, the height of the shot HDTV image will be the same, and the horizontal length will be 3 if the vertical length is 2.
The image is printed with the left and right sides of the image cut to the same width so that the length of the image is the same.

The same applies to the finder image.
As will be described later, the viewfinder image having the aspect ratio corresponding to the HDTV size is the full size, and when the image size is the panorama size, the horizontal length of the HDTV size is unchanged, and the vertical length is 3 times. In this case, the upper and lower portions of the high-definition image are cut by the same width so as to have a length of 1 and projected as a panoramic size finder image. In the case of the classical size, the vertical length of the HDTV size image is the same, and the horizontal length is the same width on the left and right of the HDTV size so that when the vertical length is 2, the horizontal length is 3 The image is cut and projected as a classical finder image. In this case, for the panorama-sized finder image, if the straight line passing through the vertical center of the panorama-sized finder image is displaced from the straight line passing through the vertical center of the original HDTV-sized finder image, it will be displaced. Even if it is slight, the length in the vertical direction is short in the panorama size, so the image that the photographer checked with the viewfinder image and thought that it was taken,
There is a possibility that the actually obtained printed image is shifted.

In order to prevent such a deviation, the camera has a field frame positioning mechanism for particularly accurately positioning a panorama size field frame. This field frame positioning mechanism will be described together with the outline of the finder optical system.

The finder optical system of this camera is housed in a finder case 10, and is provided with a prism P1 and a prism P2 with a finder base plate 17 interposed therebetween, as shown in FIG. Further, as shown in FIG. 8, between the prism P1 and the prism P2 and behind the finder base plate 17, the transmission plate 7, the fixed mask 8,
The switching mask 18 is provided, and a field frame is formed in the fixed mask 8 and the switching mask 18 as described later.

The finder of this camera is a real image type finder, and a real image of a subject incident through the objective lens L enters the prism P1, passes through a predetermined optical path in the prism P1, and is shown by arrows B and C in FIG. As described above, the light exits from the prism P1, passes through the switching mask 18, the fixed mask 8, and the transmission plate 7, and enters the prism P2. Thereafter, the light is projected on a finder through a predetermined optical path in the prism P2. The subject image emitted from the prism P1 and incident on the prism P2 is rotated by 90 ° with respect to the actual subject image. However, the subject image is rotated by 90 ° in the prism P2 and the same image as the actual subject image is obtained in the finder. Can be observed. Therefore, the aspect ratio of the field frame corresponding to the above three types of print sizes is reversed in the aspect ratio from the actual size, the field of view corresponding to the HDTV size is 16: 9, and the field of view corresponding to the classical size is 16: 9. The frame is 3: 2, and the visual field frame corresponding to the panorama size is 3: 1. In the finder optical system, the light emitted from the prism P1 forms an image once on the back surface (the fixed mask 8 side) of the transmission plate 7, and the same image as the subject image is formed on that surface (hereinafter referred to as an imaging surface). It is configured to be reproduced. The subject image formed on the rear surface of the transmission plate 7 forms an image having the same aspect ratio as the HDTV size as the maximum size (full size).

The transmission plate 7 is made of a transparent material such as plastic. As shown in FIG. 9, the transmission plate 7 includes a rectangular flat plate 7 a and a side plate 7 extending in the surface direction from the side surface of the flat plate 7 a.
The boss 7c (locking member) is provided upright on the back surface of the side plate 7b. The boss 7c has a shape that can be brought into contact with a notch 18d of the switching mask 18 described later, and may be formed integrally with the flat plate 7a and the side plate 7b, or may be attached to the side plate 7b. Is also good.

On the back surface of the flat plate 7a, a frame 7d having a size corresponding to a subject image to be formed with an aspect ratio of the above-mentioned high-definition size and an AF target mark 7e within the frame 7d are set at a short distance. The correction mark 7f is provided by printing. The frame 7d, the AF target mark 7e, and the short distance correction mark 7f are displayed on the viewfinder together with the subject image. The AF target mark 7e is a mark indicating a region to be focused. While observing the viewfinder image, the photographer
When the subject is aligned with the F target mark 7e, the subject to which the AF target mark 7e is focused is photographed by the auto-focus (automatic focus adjustment) function of the camera during photographing.
The short distance correction mark 7f is a mark indicating a range of a finder image at the time of short distance shooting. In this camera, parallax occurs because the finder optical system and the photographing optical system are separately provided, but there is no problem if the subject is located at a distance of a certain distance or more. However, in the case of close-up shooting, the deviation between the subject image and the finder image becomes large. In the case of short-distance shooting at a certain distance or less, the photographer recognizes the inside of the short-distance correction mark 7f as an image to be shot when observing the viewfinder image. Is no longer a problem.

As shown in FIG. 8, the transmission plate 7 is provided on the finder base plate 17 so that the frame 7d substantially coincides with the high-vision size subject image reproduced on the image plane.
Attached to.

The fixed mask 8 (fixed frame) is a rectangular thin plate. On the lower right side, as shown in FIG. 10, a Hi-Vision frame 8a (16: 9 aspect ratio), which is a Hi-Vision size field of view, is provided. Is open. And the fixed mask 8
Is attached to the transmission plate 7 with an adhesive so that the high-vision frame 8a and the frame 7d of the transmission plate 7 coincide with each other.

As shown in FIGS. 1 and 10, the switching mask 18 (moving frame) has a fan shape, and is attached to a shaft 19 at an upper portion thereof.
Rotates along with the back surface of the fixed mask 8 in accordance with the rotation, and when the shaft 19 is fixed, the switching mask 1 is rotated.
8 is also fixed. Also, on the back surface of the switching mask 18,
A pin 18c is provided. The coil spring 23 has one end portion hung on the pin 18c and the other end portion hung on the pin 22 provided in the finder case 10, and the shaft 1
Mounted around 9. Therefore, the switching mask 18 is always urged counterclockwise by the coil spring 23 when viewed from the direction of arrow A in FIG.
However, the biasing force is applied to the switching mask 1 via the shaft 19.
8 is weaker than the rotational force transmitted to the shaft 8 and the force with which the switching mask 18 is fixed by fixing the shaft 19, that is, only when no external force is applied to the shaft 19, the switching mask 18 It rotates counterclockwise by the urging force.

As shown in FIG. 10, the switching mask 18 has a classical frame 18a and a panoramic frame 18b formed side by side. There is no frame on the right side of the classical frame 18a, and the classical frame 18a has a U-shape. The left side of the classical frame 18a is partially notched, and a notch 18d that can contact the boss 7c of the transmission plate 7 is provided.
Is formed. When the switching mask 18 rotates counterclockwise and the notch 18d comes into contact with the boss 7c, the switching mask 18 is locked. The vertical length of the classical frame 18a is 3 when the horizontal length of the HDTV frame 8a of the fixed mask 8 is 2, and the horizontal length of the classical frame 18a is slightly smaller than that of the HDTV frame 8a. It is getting longer.

The panorama frame 18b is moved when the switching mask 18 rotates and the notch 18d comes into contact with the boss 7c.
The center line of the panorama frame 18b is overlapped with the center line of the high-definition frame 8a parallel to the vertical direction. The panorama frame 18b has a slightly longer vertical length than the high-definition frame 8a, and a horizontal length of 1 when the vertical length of the high-definition frame is 3.

The positional relationship between the switching mask 18 and the fixed mask 8 will be described with reference to FIG. 10, together with the rotational positions of the gears 5 and 6. FIG. 10 shows a fixed mask 8.
And the switching mask 18 as viewed from the front (in the direction A in FIG. 6), and the gears 5 and 6 located further forward are shown.
Is shown by a virtual line, and only the boss 7c is shown for the transmission plate 7. For convenience, the AF target mark 7e and the short distance correction mark 7f of the transmission plate 7 are
Are indicated by imaginary lines at positions facing each other.

When the click member 3 is at the position shown in FIG. 5 (b), the switching mask 18 is in a state where the classical frame 18a overlaps the HDTV frame 8a with respect to the fixed mask 8 as shown in FIG. 10 (b). It has become. At this time, although the switching mask 18 is urged in the counterclockwise direction by the coil spring 23, the central tooth of the gear 5 abuts against the central tooth of the gear 6, and the gear 6 is no longer counterclockwise. Since the gear 6 cannot be rotated clockwise, the gear 6 is fixed, and the switching mask 18 is also fixed at the position shown in FIG. Since the size relationship between the high-definition frame 8a and the classical frame 18a is as described above, as a result, the fixed mask 8 and the switching mask 18 cause the vertical length of the classical frame 18a to be the vertical length, and the high-definition frame 8a Let the horizontal length of be the horizontal length,
A field frame having an aspect ratio (3: 2) corresponding to the classical size can be formed. Therefore, the prism P1
The image of the subject emitted from the transmission plate 7 and formed on the rear surface of the transmission plate 7 is limited to a size having an aspect ratio corresponding to the classical size by the field frame, and enters the prism P2.

When the click member 3 rotates counterclockwise from the state shown in FIG. 5B to the state shown in FIG.
The gear 5 rotates clockwise, the gear 6 rotates counterclockwise, and the switching gear 18 also rotates counterclockwise. At this time, due to the rotational force transmitted from the click member 3,
The gears 5 and 6 rotate until they reach the state shown in FIG. At this time, the switching mask 18 is
Counter-clockwise, while the gear 6
Because of the presence of the gap 21, the counterclockwise rotation is not restricted by the gear 5. Therefore, since there is no force against the urging force of the coil spring 23, the switching mask 18 is moved by the urging force of the coil spring 23.
Rotates counterclockwise. When the notch 18d comes into contact with the boss 7c due to the rotation, the switching mask 18 is fixed at that position, and the panorama frame 18b overlaps the high-definition frame 8a as shown in FIG. 10A. Switching mask 18 by urging force of coil spring 23
When the gear rotates, the gear 6 also rotates a little through the shaft 19, so that there is play around the teeth 5a of the gear 5 as shown in FIG. As described above, in the vicinity where the panorama frame 18b overlaps the high-definition frame 8a, the switching mask 18 is not necessarily a rolling force derived from the movement of the operation knob 2, but the cutout portion 18d is always attached to the boss 7c by the urging force of the coil spring 23. Rotate until it abuts.
Therefore, the position where the switching mask 18 is fixed depends on the precision of the gears 5 and 6, more specifically, the field frame switching mechanism 1.
Is always constant irrespective of the accuracy of the operation.

Since the size relationship between the high-vision frame 8a and the panorama frame 18b is as described above, as a result, the fixed mask 8 and the switching mask 18 make the vertical length of the high-vision frame 8a vertical. Panorama frame 18
A field frame having an aspect ratio (3: 1) corresponding to the panorama size, where the horizontal length of b is the horizontal length, can be formed. Therefore, the subject image emitted from the prism P1 and formed on the rear surface of the transmission plate 7 is limited to a size having an aspect ratio corresponding to the panorama size by the field frame, and enters the prism P2. When the switching mask 18 rotates and the notch portion 18d comes into contact with the boss 7c, the center line of the panorama frame 18b overlaps with the center line parallel to the vertical direction of the HDTV frame 8a. Therefore, the finder image is a panorama-size finder image in which the upper and lower portions of the high-definition finder image are cut by the same width, and always matches the image of the photograph to be printed.

When the click member 3 rotates clockwise from the state shown in FIG. 5B to the state shown in FIG. 5C, the gear 6 also rotates clockwise, and the switching gear 18 also turns the coil spring 23. When they rotate together against the urging force of FIG.
As shown in (c), the high definition frame 8a of the fixed mask 8
In contrast, the switching mask 18 does not overlap.
At this time, although the switching mask 18 is urged in the counterclockwise direction by the coil spring 23, the right end tooth of the gear 5 is in contact with the right end tooth of the gear 6, and the gear 6 is The switching mask 18 cannot be rotated clockwise and is fixed, and the switching mask 18 is also fixed at that position via the shaft 19. Therefore, at this time, the high vision frame 8a is used as a field frame, and the subject image emitted from the prism P1 is limited to a size having an aspect ratio corresponding to the high vision size, and enters the prism P2.

As shown in FIG. 8, an opening 17a is provided below a portion of the finder base plate 17 through which the shaft 19 passes.
The opening 17a is formed so as to have at least the same length and width as the high-definition frame 8a, and the light of the subject image that has passed through the switching mask 18 and the fixed mask 8 is formed. , Finder base plate 1
7 so that it is not obstructed.

In this camera, when the operation knob 2 is operated, a magnetic recording corresponding to a desired size among the high definition size, the classical size and the panorama size is made on the film through the detection switch 16 at the time of photographing. It has become so.

The detection switch 16 is, as shown in FIG.
It comprises a rotating frame 16a and a detecting unit 16b. Rotating frame 16a
Has a donut shape when viewed from above, and the peripheral edge of the circular opening at the center is stepped as shown in FIG. The detecting portion 16b is joined to the rotating frame 16a, and the holding portion 16c with which the detecting pin 15 is engaged and the terminal portion 16d are formed integrally. The detection switch 16 is attached by rotating the rotary frame 16 a to be rotatable with respect to the cylindrical base 31. The detection switch 16 includes a detection pin 15 engaged with the holding portion 16c.
Is rotated counterclockwise with the rotation of the click member 3, the pin 16c is pushed by the detection pin 15, and rotates clockwise when viewed from above. Conversely, when the detection pin 15 rotates clockwise with the click member 3, the detection pin 15 rotates counterclockwise.

As described above, since the click member 3 is fixed at three rotational positions by operating the operation knob 2, the detection switch 16 also changes the three rotational positions corresponding to them. The terminal section 16d also has three directions with the rotation of the detection switch 16, and these directions correspond to the print size desired by the photographer. Also, the base 31
A printed circuit board 30 is provided on the upper part of the printed circuit board. A plurality of detection terminals (not shown) are formed on the printed circuit board 30 by printing, and a terminal portion 16d is electrically connected to the detection terminals. . When the operation knob 2 is operated, the detection switch 16 is rotated, and when the terminal portion 16d changes its direction, different signals corresponding to the respective directions are transmitted to the film via the detection terminals of the printed circuit board 30. The information is output to a recording medium that performs magnetic recording. With this recording medium, the contents corresponding to each of the three print sizes are magnetically recorded on the film.

That is, when the photographer operates the operation knob 2 to take a picture in a desired size, the finder is also switched to the desired size, and the magnetic recording corresponding to the film is performed to obtain a print photograph of the desired size. Therefore, the actual shooting itself is performed in one size (high-definition size), but the photographer can use this camera as if shooting at a desired size each time shooting was performed. Things.

Next, the operation of the above camera will be described.

When the knob 2b of the operation knob 2 is oriented vertically (position C in FIG. 1), the click member 3
5b is in a state of being engaged with the concave portion 9e of the mounting plate 9, as shown in FIG. At this time, the switching mask 18 is located at a position where the classical frame 18a overlaps the high-definition frame 8a with respect to the fixed mask 8 as shown in FIG. 10B, and a field-of-view frame corresponding to the classical size is formed. Therefore, the subject image emitted from the prism P1 and formed on the rear surface of the transmission plate 7 is limited to a size corresponding to the classical size, then enters the prism P2, and the photographer can view the finder image having the aspect ratio of the classical size. Can be seen. When the claw portions 14b abut against the protrusions 9c and 9d, the movements of the click member 3 and the operation knob 2 are locked, the switching mask 18 cannot be rotated, and the field frame is fixed at the classical size. ing. At this time, if photographing is performed, a signal corresponding to the classical size is output to the recording medium via the terminal portion 16d of the detection switch 16, and the fact that the recording medium has been photographed at the film in the classical size is magnetically detected. Recorded in.

In order to perform panoramic photography, the photographer pushes the operation knob 2 to the thin portion 14c with the claw portion 14b pressed by the projection 9c.
When it is turned counterclockwise (P direction in FIG. 1) with a force enough to cause it to elastically deform inward, the click member 3 rotates, and the state shown in FIG. With the rotation of the click member 3, the engaging pin 4c of the connecting lever 4 is moved downward, and the connecting lever 4 as a whole is
Rotate clockwise. As a result, the gear 5 also rotates clockwise, the gear 6 meshing with the gear 5 rotates counterclockwise, and the switching mask 18 that rotates the same as the gear 6 also rotates counterclockwise. The switching mask 18 rotates by the rotational force transmitted from the gear 5 until the gears 5 and 6 reach the state shown in FIG. 7, and thereafter rotates counterclockwise by the urging force of the coil spring 23, and FIG. As shown in ()), when the notch 18d abuts on the boss 7c, it is fixed at that position, the panorama frame 18b overlaps the high-vision frame 8a, and a field frame having an aspect ratio corresponding to the panorama size is formed. Therefore, the subject image emitted from the prism P1 and formed on the rear surface of the transmission plate 7 is limited to a size corresponding to the panorama size, then enters the prism P2, and the photographer obtains a finder image having an aspect ratio of the panorama size. Can be seen.

Once the state shown in FIG.
4b is in contact with the projection 9c, and the click member 3 cannot rotate clockwise and return. Operation knob 2
Is further locked in the counterclockwise direction, the locking member 4c is locked by the locking pin 4c of the connecting lever 4, and the click member 3 cannot be further rotated counterclockwise from the state of FIG. Both the click member 2 and the click member 3 are fixed. Therefore, the position of the switching mask 18 is also fixed, and the finder image is also fixed at the panorama size. Also,
At this time, if photographing is performed, a signal corresponding to the panorama size is output to the recording medium via the terminal portion 16d of the detection switch 16, and the fact that the panorama size was photographed on the film by the recording medium is magnetically recorded. Is done.

When the operation knob 2 is rotated clockwise by applying a force greater than the force of elastic deformation of the thin portion 14c, the switching mask 18 is also rotated clockwise, and the finder image returns to the classic size. .

On the other hand, the photographer pushes the operating knob 2 so that the thin portion 14c is elastically deformed inward when the claw portion 14b is pushed by the projection 9d so as to perform the shooting from the classical size to the high-vision size. By turning clockwise (direction H in FIG. 1) from position C in FIG.
Rotates to the state shown in FIG. This click member 3
With the rotation of, the engagement pin 4c of the connecting lever 4 is moved upward, and the connecting lever 4 as a whole rotates counterclockwise about the shaft 4a. Thus, the gear 5
Also rotates counterclockwise and meshes with gear 5
Rotates clockwise, and the switching mask 18 that rotates the same as the gear 6 also rotates clockwise against the urging force of the coil spring 23, and as shown in FIG. On the other hand, since the switching mask 18 does not overlap, the high-vision frame 8a becomes the field of view. Therefore, the subject image emitted from the prism P1 and formed on the rear surface of the transmission plate 7 is limited to a size corresponding to the HDTV size, then enters the prism P2, and the photographer can view the finder image having the HDTV size aspect ratio. Can be seen.

Once the state shown in FIG.
4b is in contact with the projection 9d, and the click member 3 cannot rotate counterclockwise and return. Further, if the operation knob 2 is further rotated clockwise, the click member 3 is locked by the locking pin 4c of the connecting lever 4 and the click member 3 cannot be further rotated clockwise from the state of FIG. , The operation knob 2 and the click member 3 are fixed.
Therefore, the position of the switching mask 18 is also fixed, and the finder image is also fixed at the HD size. Also,
At this time, if photographing is performed, a signal corresponding to the high-definition size is output to the recording medium via the terminal portion 16d of the detection switch 16, and the fact that the high-definition size is photographed on the film by the recording medium is magnetically recorded. Is done.

When the operation knob 2 is rotated counterclockwise by applying a force greater than the force that causes the thin portion 14c to elastically deform, the switching mask 18 also rotates counterclockwise, and the finder image is changed to the classic size. Return to

According to the camera of the present invention described above, in the camera provided with the field frame corresponding to the panorama size, the fixed mask 8 fixed so as to substantially coincide with the image forming plane on which the subject image is formed. A switching mask 18 rotatable behind the fixed mask 8, and a boss 7 c capable of locking the rotation of the switching mask 18. The panorama-size field frame includes the fixed mask 8 and the switching mask. 18
Are formed by overlapping, and the switching mask 18 is
Is locked, the switching mask 18 is always fixed at a position where it overlaps with the fixed mask 8 to form a panorama-size field frame.

Therefore, a panorama-size field frame is
The finder image can be reliably fixed to a certain location so as to match with a captured image with high accuracy.

This camera has a field frame switching mechanism including a gear mechanism for driving the switching mask so that the switching mask 18 rotates behind the fixed mask 8, and the switching mask 18 is engaged by the boss 7c. When the field frame switching mechanism stops moving to a predetermined position near the boss 7c so as to be stopped, the rotation of the switching mask 18 is no longer restricted, and the switching mask 18 is rotated only by the urging force of the coil spring 23 to rotate the boss 7c. Is locked. Therefore, the position where the switching mask 18 is locked to the boss 7c is constant without being affected by the accuracy of the operation of the gear mechanism.

In addition, the switching mask 18 has a boss 7c
Since the notch portion 18d that can contact with the switching mask 18 is provided, the entire switching mask 18 can be formed compact.

In the above embodiment, the relationship between the imaging surface of the finder optical system, the boss 7c of the transmission plate 7, the fixed mask 8, the switching mask 18, and the like is determined in advance by the notch 18d of the switching mask 18. Is configured to be in the same finder image as a panoramic-size print photograph when it comes into contact with the boss 7c. Such a configuration may be obtained by precisely manufacturing and assembling parts in advance in the design stage, or may be accurately adjusted after assembly. For example, an eccentric pin 24 is used instead of the boss 7c,
After assembling the transmission plate 7, the fixed mask 8, the switching mask 18, and the like, the position of the eccentric pin 24 is adjusted by the jig T, and when the notch 18d of the switching mask is in contact with the eccentric pin 24, the switching is performed. Panorama frame 18 of mask 18
The eccentric pin 24 may be fixed at a predetermined position so that b overlaps the HDTV frame 8a of the fixed mask 8 in the same manner as in the above embodiment.

[0065]

According to the camera described in the first aspect, the field frame formed by the movable frame overlapping the fixed frame is also fixed to a substantially fixed position. Even when the fixed frame and the moving frame are used to form a specially sized field frame such as a panorama size, which is likely to be affected by positional deviation, this field frame is used as the image to be photographed with the viewfinder image. A camera that can be reliably fixed at a fixed location so that it always matches with high accuracy.

According to the camera of the second aspect, the field frame composed of the fixed frame and the field frame is also fixed at a substantially fixed position. Even if the field frame composed of the fixed frame and the moving frame has a special shape such as a panorama size,
A camera that can be reliably fixed to a certain location so that the viewfinder image matches the captured image with high accuracy.

According to the camera of the third aspect, the position of the movable frame which is locked by the locking member is constant without being affected by the accuracy of the operation of the gear mechanism and the like. Is fixed at a substantially fixed position.

According to the camera of the fourth aspect, the movable frame is locked by the locking member at the notch and fixed at a predetermined position. In addition, since the moving frame is partially cut out and locked by the locking member, the entire moving frame can be formed compact.

According to the camera of the fifth aspect, the position of the eccentric pin is adjusted at the stage of assembling the camera. This makes it possible to reliably fix the visual field frame to a certain location so that the viewfinder image matches the image to be captured with high accuracy.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view showing an example of a camera according to the present invention.

FIG. 2 is a perspective view of an operation knob attached to the camera of FIG.

FIG. 3 is a partial cross-sectional view showing a state in which an operation knob and a click member of the camera in FIG. 1 are mounted on a mounting plate.

FIG. 4 is a plan view of a detection switch attached to the camera of FIG.

FIG. 5 is a plan view showing a relationship among a click member, a connection lever, and a detection switch of the camera of FIG. 1;

6 is a plan view showing the inside of the camera shown in FIG. 1, and an arrow A in the figure is in the same direction as the arrow A in FIG.

FIG. 7 is a partial plan view showing a positional relationship between a gear 5 and a gear 6.

FIG. 8 is a sectional view taken along the line MM of FIG. 6;

FIG. 9 is a perspective view showing a rear surface side of a transmission plate provided in the camera in FIG. 1;

FIG. 10 is a plan view showing a positional relationship between a fixed mask and a switching mask of FIG. 1;

FIG. 11 is a perspective view showing a method for adjusting the position of an eccentric pin as a locking member used in another example of the camera of the present invention.

[Explanation of symbols]

 1 view frame switching mechanism 2 operation knob 3 click member 4 connection lever 5, 6 gear 7 transmission plate 7c boss (locking member) 8 fixed mask (fixed frame) 8a HDTV frame 18 switching mask (moving frame) 18a classical frame 18b panorama Frame 18d Notch 20 Camera body 23 Coil spring (elastic member) 24 Eccentric pin (locking member)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kohei Kaneko 1-1538 Kamikawa, Suwa-shi, Nagano Prefecture Nitto Kogaku Co., Ltd. (72) Inventor Takashi Yamaguchi 1-1538 Kamikawa, Suwa City, Nagano Prefecture Nitto Kogaku Co., Ltd.

Claims (5)

[Claims] 1. A camera provided with a field frame for limiting a range of a subject image in a viewfinder optical system so that the viewfinder image becomes the same image as a print photograph obtained after photographing, wherein the subject image is formed. A fixed frame fixed so as to substantially coincide with an imaging surface to be moved, a movable frame movable in front of or behind the fixed frame, and a locking member capable of locking movement of the movable frame. The visual field frame is formed by overlapping the fixed frame and the moving frame. When the moving frame is locked by the locking member, the visual field frame is formed by overlapping the fixed frame. The camera, wherein the moving frame is fixed at such a position. 2. An elastic member for biasing the moving frame is provided so as to be locked by the locking member, and the moving frame is provided near the locking member by a biasing force of the elastic member. The camera according to claim 1, wherein the camera moves only and is locked by the locking member. 3. A gear mechanism for driving the movable frame so that the movable frame moves in front of or behind the fixed frame, wherein the movable frame is locked by the locking member by the gear mechanism. When the gear mechanism is moved to a predetermined position near the locking member, the gear mechanism does not restrict the movement of the moving frame, and the moving frame moves only by the urging force of the elastic member to lock the moving frame. 3. The camera according to claim 2, wherein the camera is configured to be locked to a member. 4. The camera according to claim 1, wherein the movable frame is provided with a notch that can contact the locking member. 5. A transmission plate is provided near the image plane so as to be parallel to the image plane, the fixed frame is attached to the transmission plate, and the locking member is an eccentric pin. The eccentric pin is attached to the transmission plate after being adjusted so that the moving frame locked by the eccentric pin overlaps the fixed frame to form the viewing frame. The camera according to any one of claims 1 to 4, wherein