JPH05232576A - Camera capable of switching image frame size - Google Patents

Abstract

PURPOSE:To provide a camera capable of switching an image frame size and whose printing operation is simple. CONSTITUTION:This camera is provided with a motor-driven film feeding means 33 feeding the frame of a film, winding and rewinding the film, and an image frame size switching means 201 switching an image frame size to a normal size image frame or a control size image frame; and provided with a controlling means 41 in which the film is fed from a first frame when the image frame size is switched to one image frame size by the image frame size switching means 201, the film is wound to the last frame and reversely fed from the last frame when the image frame size is switched to the other image frame size, and furthermore, the film is rewound or wound to the frame which can be photographed and corresponds to the image frame size switched and fed from that frame when the image frame size is switched in the middle of photographing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen size switching camera capable of changing the screen size while shooting with a single film.

[0002]

2. Description of the Related Art In recent years, there has been proposed a camera capable of changing a shooting screen between a normal full size screen and a panoramic size screen while shooting one film. However, if the screen size is changed during shooting, the full size screen 25 and the panorama size screen 2 are displayed as shown in FIG.
6 and 6 are mixed. Therefore, especially in a so-called laboratory, the panoramic size screen 26 is first skipped and only the full size screen 25 is printed, and then the full size screen 25 is skipped and only the panoramic size screen 26 is printed. There was a problem that the printing work was very troublesome.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the problem of a camera whose screen size can be changed in the middle of shooting, and it is an object of the present invention to provide a screen size switching camera which simplifies the printing operation.

[0004]

SUMMARY OF THE INVENTION To achieve this object, the present invention relates to an electric film feeding means for frame-advancing, winding and rewinding film, and a screen size switching means for switching the screen size between a standard size screen and a regulated size screen. A camera equipped with, and the film is advanced from the first frame when the screen size is switched to one screen size by the screen size switching means, and the film is transferred to the final frame when the screen size is switched to the other screen size. A control unit that winds the film backwards from the last frame, and when the screen size is switched during shooting, rewinds or winds the film to the shootable frame corresponding to the switched screen size, and feeds the film from that frame. It is characterized by having and. With this configuration, even if the screen size is changed during shooting, the standard size screen and the regulated size screen are divided into separate groups and are shot (exposed) on one film.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. FIG. 2 is a perspective view showing the back surface of the main part of the embodiment of the film feeding device of the camera to which the present invention is applied. A film guide block 11 of a camera body (not shown) is provided with a semi-cylindrical patrone holder 13 and a film take-up portion 15 at both ends thereof, and an aperture frame 17 for regulating a photographing screen size is provided at a central portion thereof. Are formed. The aperture frame 17 regulates the standard screen size. Further, the cartridge 21 is loaded in the cartridge holding portion 13, and the film winding portion 15
A spool shaft 31 pivotally supported by a fixed portion of the camera body is rotatably housed therein.

Although not shown in detail, the spool shaft 31 and the shaft of the cartridge 21 are electrically driven film feed mechanisms 33.
Driven by. That is, the film feeding mechanism 33
The spool shaft 31 is driven to feed and wind the film frame by frame, and the shaft of the cartridge 21 is rotated to feed the film in the reverse direction and rewind the film. A sprocket 35 rotatably supported by the body is engaged with the perforation 25 of the film 23.
The sprocket 35 rotates in association with the traveling of the film 23, and the rotational direction and the rotational amount thereof are detected and counted by the film traveling counting means 27.

Further, the camera of this embodiment is provided with a screen size switching means 201 on the photographing lens side of the aperture frame 17 for restricting the photographing screen to a horizontally long panoramic size screen. As an example of the screen size switching means 201,
FIG. 3 shows an embodiment in which the upper and lower parts of the aperture frame 17 are covered with a light shielding plate. A pair of light shielding plates 204 and 205, which are longer than the width of the aperture frame 17, are arranged outside the upper and lower sides of the aperture frame 203 that regulates the full-size screen. One end of each of the pair of shading plates 204 and 205 is slidably guided by a guide plate 206 extending in the lateral direction of the screen. A pair of nuts 207 and 208 having a reverse thread are fixed to the other ends of the light shielding plates 204 and 205. The nuts 207 and 208 are screwed to the reverse screw portions 209a and 209b of the shaft 209 provided outside the other short side of the aperture frame 17 in parallel with the short side. Therefore, when the shaft 209 rotates, the light shielding plates 204 and 205 move in parallel in the panorama size forming direction in which they approach each other or in the standard size screen forming direction in which they separate from each other according to the rotation direction.

The shaft 209 has a reduction gear mechanism 21.
It is rotationally driven by a motor 213 via 0, 211 and 212. The motor 213 is driven by the drive control circuit 215 in response to the switching of the screen size selection switch 214, and drives the light shielding plates 204 and 205 to the normal size screen position or the panorama size screen position. In the panorama size position, the light shielding plates 204 and 205 regulate the upper side and the lower side of the panorama size screen by these edge portions 204a and 205b. It should be noted that the limit switches 216 and 217 detect that the light shielding plates 204 and 205 have reached the normal size screen position or the panorama size screen position, and the drive control circuit 215 causes the motor 2
The drive of 13 is stopped.

The configuration of the control system of this screen size switching camera will be described with reference to the block diagram shown in FIG. The film running data from the film running counting means 37 and the screen size switching data from the screen size switching means 201 are input to the control means 41. Control means 41
Is a memory means (RAM) 43 for storing the number of shots and the like.
Is equipped with. The memory means 43 has the number of frames which have already been photographed plus one frame as the number of frames to be photographed, the frame number of a filmable film next to the frame which has already been photographed, the film feed direction for frame-by-frame feed, and the switched screen The size information is assigned to different addresses (43a, 43
b, 43c, 43d, 43e). The number of shots stored in the shot number address 3a is displayed on the shot number display means (not shown). Further, the screen size information stored in the screen size memory 43e may be displayed on the display means.

The film running data output from the counting means 37 is converted into frame number data by the control means 41, and the frame number of the film which can be photographed at the position facing the aperture frame 17 and the number of photographed images are respectively stored in the memory means. 43 predetermined addresses 43a, 43b, 43c
Will be stored in. Here, as the frame numbers, there are a frame number at the time of forward frame feeding and a frame number at the time of backward frame feeding, and they are stored in separate forward frame number address 43b and reverse frame number address 43c. And control means 4
The number 1 is incremented by 1 each time the exposure is completed and one frame is advanced, and the frame number is incremented by 1 in the frame number address 43a.
When feeding backward frames, subtract 1 to reverse frame number address 4
Store in memory 3c.

Further, when the screen size is switched by the screen size switching unit 201, the control unit 41 stores the switched screen size information in the screen size address 43e and the film frame feed direction information in the film feed direction address 43d. To memory. Then, the control means 41 causes the film feeding mechanism 33 to perform forward frame feeding or backward frame feeding based on the direction data of the film feeding direction address 43d, and adds the frame number to the forward frame number address 43b or subtracts it. Then, it is stored in the reverse frame number address 43c.

Next, the operation of the film feeding mechanism 33 during photographing will be described. The film feed mechanism 33
The operation of is controlled by the control means 41. When the screen size switching means 201 is switching to the standard size (full size) screen, it operates as follows.
When the film 23 (patrone 21) is loaded and the back cover (not shown) is closed, the spool shaft 31 is rotated in the winding direction to automatically wind the film to the first frame (indexing). Here, both the number of shots and the frame number are set to "1" and stored in the addresses 43a and 43b of the memory means 43, respectively. After that, one frame is advanced (winding for one frame) each time it is exposed, and the number of photographed images and the frame number are incremented by 1 and stored in the addresses 43a and 43b of the memory means 43.

The operation when the screen size is changed will be described with reference to the flowchart shown in FIG. When the shooting screen is changed to the panoramic size screen by the screen size switching unit 201, when this switching is the first switching, the film feeding mechanism 33 causes the film 2
3 is wound up to the final frame (S101, S103). Then, the frame feed direction is reversed to enable shooting from the last frame (S107). That is, when the image is taken on the panorama size screen, the film feed mechanism 33 feeds one frame in the reverse direction (rewinds one frame at a time) every time it is exposed. The control means 41 counts the output of the film running counting means 37, detects that the film 23 has reached the specified final frame, stops the film feeding mechanism 33, and changes the frame number to the frame number before switching. The reverse frame number address 4 which is different from the forward frame number address 43b for storing
Store in memory 3c. Then, each time it is exposed, a value obtained by adding 1 to the content of the number-of-photographed image address 43a is stored in the number-of-photographed image address 43a.

Here, again, the screen size switching means 201
When the shooting screen is changed to the full size screen by, the film feeding mechanism 33 rewinds the film 23 to the frame number stored in the forward frame number address 43b and reverses the frame feeding direction (S101, S105, S107). , Allows forward frame-by-frame shooting. When the shooting screen is changed to the panorama size screen, the film feed mechanism 33 advances the film 23 to the reverse frame number stored in the reverse frame number address 43c, and performs reverse frame-by-frame shooting from this frame number.

The state in which the film photographed by this camera is developed is shown in FIG. In this way, when shooting with the camera of this embodiment, the shooting screen with the full size screen continues from the beginning of the film, and the shooting screen with the panoramic size screen continues from the last frame of the film. Therefore, it is possible to easily distinguish the full-size print and the panoramic-size print, which makes the printing work very easy.

As described above, in this embodiment, when the full size screen is used, the film is taken from the beginning of the film, but the reverse structure may be used. Further, the screen size switched when the film is loaded may be prioritized and the film size may be taken from the beginning of the film.

[0017]

As is apparent from the above description, in the camera of the present invention, when the screen size switching means is switching to one screen size, the film is sequentially fed from the first frame to shoot and the other screen size is selected. When switching,
When the film is sent to the last frame and the frame is moved backward from the last frame for shooting, and if the screen size is switched during shooting, the film is rewound or wound up to the shootable frame corresponding to the switched screen size. Since the images are taken from that frame, the images can be taken continuously on a single film for each screen size, which facilitates processing in the laboratory and arrangement of the film by the photographer.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main configuration of a control system of a film switching camera provided with the present invention.

FIG. 2 is a perspective view showing a back surface of a main part of an embodiment of a film feeding device of the camera.

FIG. 3 is a front view showing an embodiment of a screen size switching means of the camera.

FIG. 4 is a flowchart regarding an operation when the screen size is switched.

FIG. 5 is a front view of a photographed film.

[Explanation of symbols]

 23 film 26 full size shooting screen 27 panorama size shooting screen 33 film feed mechanism 35 sprocket 37 film run counting means 201 screen size switching means

Claims (3)

[Claims] 1. A camera comprising: an electric film feeding means for frame-advancing, winding and rewinding a film, and a screen size switching means for switching a screen size between a standard size screen and a regulated size screen. When the screen size is switched to one screen size by the size switching means, the film is advanced from the first frame, and when it is switched to the other screen size, the film is wound up to the final frame and then the reverse frame is advanced from the final frame. When the screen size is changed during shooting, a control means for rewinding or winding the film up to a shootable frame corresponding to the changed screen size and advancing the film from the frame is provided. Size switching camera. 2. The camera according to claim 1, further comprising a film counting means for counting the frame number of the film at the photographing position, and a screen size before switching when the screen size is switched by the screen size switching means. And a memory means for respectively storing the frame numbers of filmable films in the above, and the control means rewinds the film to the frame number corresponding to the screen size stored in the memory means each time the screen size is switched, or A screen size switching camera characterized by rolling up. 3. The control means according to claim 2, when the screen size is switched by the screen size switching means, winds or rewinds the film to a frame number stored in the storage means according to the screen size. A screen size switching camera characterized by.