JPH07333685A - Multiple exposure device for camera - Google Patents

Abstract

PURPOSE:To obtain a camera capable of multiple exposure by selecting an arbitrary photographic frame out of the photographed frames, rewinding a film up to a specified photographic frame and performing overlap photographing. CONSTITUTION:When the multiple exposure is selected by a multiple exposure switch 44, a multiple photographic frame is selected out of the photographed frames by an up-down switch 46. The number of the selected multiple photographic frames is displayed on the photographic frame display 48 of a display LCD47. Then, the reading of a multiple exposure preventing code by a magnetic head 16 is canceled and the film is rewound up to the specified frame by a driving motor M. In this case, the photographed frame is accurately matched with a photographic aperture and stopped, so that the output of a photosensor corresponding to a perforation is used. Thus, when a release switch 42 is turned on after the selected existing photographic frame is rewound, the multiple exposure is attained by normal photographing sequence.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a multiple exposure device for a camera.

[0002]

2. Description of the Related Art In the conventional camera, multiple exposure is performed by shooting two consecutively shot scenes on the same shooting frame. Further, in a self-winding camera, multiple exposure is performed only on future frames. No exposure is possible. Even if a camera is used for film winding to perform multiple exposure, it is difficult to completely match the shooting frame with the shooting aperture because a complicated mechanism is required.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multiple exposure camera capable of multiple exposure for any already photographed frame.

[0004]

SUMMARY OF THE INVENTION The present invention is a new film cassette having a film drive spool for feeding and rewinding a film by rotating the film in forward and reverse directions, and a recording section for recording information on a film frame on a film. Since a cassette has been proposed, this film cassette is used to enable multiple exposure for arbitrary frames. That is, the present invention is directed to filming a film in a camera that uses a film cassette having a film drive spool that can feed and wind a film by rotating the film in the forward and reverse directions, and a recording unit for recording information about a filming frame on the film. Designating means for designating an arbitrary photographed frame as a multiple-exposure frame from among the finished frames; the film drive spool is driven based on the designation of this designating means, and the film is designated for the photographing frame based on the photographed frame information of the recording section. It is characterized in that it is provided with a rewinding means for rewinding up to and a multi-exposure means for superimposing an image on an already photographed frame which has been rewound.

In a camera using this new film cassette, it has been considered to prevent the multiple exposure by providing a means for writing the information of the already photographed frame to the recording section of the film photographed frame. The multiple exposure means permits the shutter release after ignoring or erasing the already photographed frame information by the writing means.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. FIG. 6 is a conceptual diagram of a new film cassette. The film cassette 11 includes a film drive spool 13 to which one end of the film 12 is fixed. The film drive spool 13 can perform a winding operation of winding the film 12 into the film cassette 11 and a sending operation of sending the film 12 out of the film cassette 11 by its normal rotation operation and reverse rotation operation. The film advancing / retreating opening 11a of the film cassette 11 is provided with a light shielding means. A magnetic recording band 14 is formed on one side of the film 12, and two perforations 15 are formed per photographing frame on the other side. In the magnetic recording band 14, at least photographing frame information of photographed frames or unphotographed frames is recorded for each photographed frame. The magnetic head 16 provided on the camera side has a reading function of reading the photographing frame information of the magnetic recording band 14 and a writing function of writing the photographing frame information to the magnetic recording band 14. The perforations 15 are used not for winding the film but for accurately stopping the photographing frame on the film at a fixed position through the optical position detecting means.

In the camera body 21 of the camera 20 of the present invention, as shown in FIGS. 1 to 3, a film cassette storage chamber 32 and a film cassette storage chamber 32 are provided on the left and right sides with a photographing opening 26 for determining an exposure area of the film interposed therebetween. A winding chamber 33 is provided. The film cassette storage chamber 32 and the film winding chamber 33 communicate with each other through the film passage 24,
On the back of the photographing opening 26, the film 12 is attached to the photographing opening 2
The pressure plate 27 that pushes to the 6 side is located.

An opening / closing lid 23 for opening / closing the film cassette storage chamber 32 is provided on one side of the upper surface of the camera body 21. The plate-shaped opening / closing lid 23 slides to open / close the cassette storage chamber 32, and as shown in FIG.
A rack 23a is formed on the back surface of the rack 23a.
The pinion 34, which is rotationally driven by the lid opening / closing motor M3, is meshed with. Therefore, the film cassette storage chamber 32 is opened / closed by the forward / reverse rotation of the lid opening / closing motor M3. The camera of this embodiment does not have a back cover unlike the conventional camera.

The cassette storage chamber 32 is provided with a drive system for driving the film drive spool 13 in the forward and reverse directions. FIG. 3 is an example thereof, and the rotation of the drive motor M1 is transmitted to the forward / reverse rotation shaft 31 via the gear train 30. The forward / reverse rotation shaft 31 faces the inside of the cassette storage chamber 32 and meshes with the film drive spool 13. For example, when the film drive spool 13 is normally rotated through the forward / reverse rotation shaft 31, the film 12 moves from the film advancing / retreating port 11a to the outside, that is, through the film passage 24, and the film winding chamber 3
Sent to 3.

A film winding shaft 33a is disposed in the film winding chamber 33, and the winding shaft 33a is rotationally driven by a winding motor M2, and the film 12 sent out by the drive motor M1 is the film winding shaft 33a. It is wound around the winding shaft 33a.

In addition to the release switch 42 and the lid opening / closing switch 43, the camera body 21 includes a multiple exposure switch 4
4, a multiple exposure cancel switch 45, and an up / down switch 46 are provided. The up / down switch 46 becomes operable when the multiple exposure is selected by the multiple exposure switch 44, and by operating this, the multiple exposure frame can be selected from the already photographed frames.
That is, the selected multiple exposure frame is displayed on the image frame display 48 of the display LCD 47. The multiple-exposure cancel switch 45 is a switch that cancels multiple-exposure shooting and winds the film up to the first unphotographed frame.

FIG. 4 shows a control system of the camera of the present invention, which includes a release switch 42, a lid opening / closing switch 43, a multiple exposure switch 44, a multiple exposure cancel switch 45, and
The switch information of the up / down switch 46 is input to the control circuit 35. The control circuit 35 is connected to the drive motor M1, the winding motor M2, and the lid opening / closing motor M3 via motor drive circuits D1, D2, and D3, respectively, and also via the head switching circuit 36, the magnetic head 1 is connected.
Connected to 6. The head switching circuit 36 is based on a command from the control circuit 35, and has a recording circuit 37 and a reproducing circuit 38.
Connected to any of. The control circuit 35 also has an AE
The / AF control circuit 39 and the display driver circuit 40 are connected, and the display driver circuit 40 is configured to display at least the image frame display 48.
The display LCD 47 including is driven.

FIG. 5 shows an example of control of the multiple exposure camera having the above structure. First, in the normal shooting sequence, the shooting sequence is executed every time the release switch 42 is turned on (steps S11 and S12). In this normal photographing, every time a photographing is performed, information (multiple exposure prevention code) indicating that the photographed frame is already recorded is recorded by the magnetic head 16 on the magnetic recording band 14 corresponding to the photographed frame.

When the multiple exposure is selected by the multiple exposure switch 44, the up / down switch 46 then selects the multiple exposure frame from the already captured frames. The number of selected multiple shooting frames is displayed on the shooting frame display 48 of the display LCD 47 (steps S13 and S14). Then, the reading of the multiple exposure prevention code by the magnetic head 16 is canceled, and the drive motor M1 causes the film 12
Is rewound to the designated frame (steps S15, S1)
6). The output of a photosensor (not shown) corresponding to the perforation 15 is used to stop the already-photographed frame so as to exactly match the photographing aperture 26. Instead of canceling the reading of the multiple exposure prevention code by the magnetic head 16, the release may be permitted by erasing the information indicating that the frame has already been photographed by the magnetic head 16.

In this way, when the release switch 42 is turned on after the selected already photographed frame is rewound, multiple exposure is performed in the normal photographing sequence (steps S17 and S18). After that, the reading of the multiple exposure prevention code by the magnetic head 16 is restarted, and the drive motor M
1. The film 12 is fed to the first unphotographed frame by the winding motor M2 and stopped (steps S20 to S2).
2).

On the other hand, when the multiple exposure cancel switch 45 is turned on without the release switch 42 being turned on even though the multiple exposure is selected, the magnetic head 16 is turned on.
The multi-exposure prevention code is restarted to be read by the drive motor M1 and the winding motor M2, and the film 12 is fed to the first unphotographed frame and stopped (steps S19 to S2).
2).

[0017]

As described above, according to the present invention, it is possible to select an arbitrary photographing frame from the already photographed frames and use it as a multiple exposure frame. Therefore, a camera without the restriction for performing multiple exposure can be obtained. To be

[Brief description of drawings]

FIG. 1 is a rear perspective view showing an external appearance example of a multiple exposure camera according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a block diagram showing a control system of the multiple exposure camera of the present invention.

FIG. 5 is a flowchart showing an operation example of the multiple exposure camera of the present invention.

FIG. 6 is a conceptual diagram showing a new film cassette.

[Explanation of symbols]

 11 film cassette 11a film advance / retreat 12 film 13 film drive spool 14 magnetic recording band 15 perforation 16 magnetic head 21 camera body 26 shooting opening 31 forward / reverse rotation axis 32 film cassette storage room 33 film winding room 43 lid opening / closing switch 44 multiple exposure Switch 45 Multiple exposure cancel switch 46 Up-down switch (Multiple exposure frame designation means) 47 Display LCD 48 Photograph frame display

Claims (2)

[Claims] 1. A camera using a film cassette having a film drive spool capable of feeding and winding a film by rotating the film in forward and reverse directions, and a recording unit for recording information on a film frame on a film. Designating means for designating an arbitrary photographed frame as a multiple-exposure frame from among the finished frames; based on the designation of the designating means, the film drive spool is driven, and the film is designated based on the photographed frame information of the recording section. A multiple-exposure device for a camera, comprising: a rewinding unit for rewinding to a shooting frame; and a multiple-exposure unit for superimposing an image on a rewound existing shooting frame. 2. The apparatus according to claim 1, further comprising means for writing information on an already-photographed frame into a recording section of the film-photographed frame, wherein the multiple-exposure means stores the already-photographed frame information by the writing means. A multiple exposure device for cameras that ignores or erases and allows shutter release.