JPH0829859A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera capable of preventing an accident caused by an unintended double exposure, etc., at the time of reloading a film cartridge in which a halfway exposed film is rewound and housed in the camera. CONSTITUTION:The camera using a film cartridge having a film with a magnetic recording part is provided with a rewinding means 9 rewinding the film 14 pulled out of the film cartridge 1A by photographing, a magnetic recording means 16 recording information on the magnetic recording part 15 on the film 14, a driving means setting/driving the exposure state display means 3A of the film cartridge 1A, a position detecting means detecting the position of an exposure state display, a magnetic reading means 18 reading the information of the magnetic recording means 16, at the time of driving to rewind the film and a judging means 12 judging whether the recording means 16 is normally actuated or not by the magnetic reading means 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera using a film cartridge containing a film having a magnetic recording section and having display means for displaying the exposure state of the film.

[0002]

2. Description of the Related Art In recent years, a film having a magnetic recording portion provided on the surface of a film by applying a magnetic coating to a roll-shaped film and recording information such as photographing information at the time of taking a photograph on the magnetic recording portion, Various proposals have been made for a film cartridge that stores this film.
Further, by using the film and the film cartridge, etc., recording of photographing information and the like on a magnetic recording portion and the like attached on the film surface, reading of recording of photographing information and the like recorded on the magnetic recording portion, etc. Various cameras capable of performing the above have been proposed, for example, by USP 4965627.

US Pat. No. 5,0068,73, Japanese Patent Publication No. 6
In JP-A-38148, after rewinding a film which has been exposed to a halfway into a film cartridge by utilizing photographing information recording etc. recorded in a magnetic recording unit etc. attached to the film surface, , When using this film cartridge reloaded in the camera, prevent double exposure to the frame that has already been exposed,
A camera has been proposed in which the film is fed to the unexposed portion frame position on the film, and the film is wound up, and the unexposed portion frame is quickly set at the photography standby position.

On the other hand, a proposal of a film cartridge which displays the exposure state of the film in the film cartridge is made, for example, in US Pat. No. 5,200,777. The film cartridge disclosed by US Pat. No. 5,200,777 has a roll-shaped film wound thereon, and is a disk arranged so as to rotate integrally with a cartridge shaft rotatably supported in the film cartridge. A cutout is provided on the outer peripheral side of the upper surface of the film, and when the film is rewound into the film cartridge, the position of the cutout is stopped at a predetermined position, depending on the exposure state of the film. By defining the stop position of the notch,
The exposure state of the film rewound and stored in the film cartridge is displayed.

Then, using the film cartridge disclosed in US Pat. No. 5,200,777, etc., and using the indication of the exposure state of the film accommodated in the film cartridge, unintentional double exposure is performed on the exposed frame. Various camera mechanisms for preventing this have been proposed in the past, for example, by USP4980709.

On the other hand, in the camera disclosed in, for example, Japanese Unexamined Patent Publication No. 5-281604, the exposure state of the film stored in the loaded film cartridge is judged and the exposure state of the film is "all frames not yet recorded". If it is determined to be in the `` exposure '' state, the normal film feeding is performed, while the film cartridge in which the partially exposed film is rewound and stored is reloaded in the camera, That is, when it is determined that the "partially frame exposed" state, the film feeding speed is made slower than usual so that the magnetic information and the like attached to the film surface can be surely read. What has been proposed is proposed.

Furthermore, in the photographic camera disclosed in Japanese Unexamined Patent Publication No. 3-137638, a film cartridge in which a film rewound during shooting is stored, that is, a "partially exposed" film. Regarding the cartridges, an inexpensive type of camera with a simple mechanism has been proposed in which the exposure state display of the film cartridge is set to "all frames exposed".

[0008]

However, the above-mentioned USP
According to the means disclosed in Japanese Patent No. 5200777, the film contained in the reloaded film cartridge is a film which has been partially exposed, that is, a film of "partly exposed frame". Only the means of indicating that there is is disclosed, disclosure of how to use this displayed information, that is,
There is no disclosure about application to cameras.

On the other hand, according to the means disclosed in Japanese Unexamined Patent Publication No. 5-281604, magnetic information or the like to the information recording portion attached to the film is recorded although the frame has already been exposed. If no information is recorded,
When an abnormality occurs in the magnetic information or the like, when the film cartridge is reloaded into the camera, it is determined that it is unexposed film,
There is a problem in that a frame of a film that has already been exposed is exposed, which causes an accident due to unintended double exposure or the like.

Further, according to the means disclosed in the above-mentioned Japanese Patent Laid-Open No. 3-137638, there is no disclosure about a film having a magnetic recording portion for recording photographic information and the like. Even if you reload the film cartridge that contains the film that has been rewound midway in a camera that uses the film you have, the exposure status of the film is displayed as "All frames exposed", so you can effectively use the magnetic information. There is a problem that you cannot do it.

An object of the present invention is to solve the above-mentioned conventional problems, and at least "partially exposed frame" and "all exposed frame".
In a camera that uses a film cartridge having a film with a magnetic recording unit and a means for determining and displaying the exposure state of the film, the film cartridge in which the film that has been exposed to halfway is rewound and stored is reloaded in the camera In doing so, it is an object of the present invention to provide a camera that discriminates the exposure state of the film to prevent accidents due to accidental double exposure or the like.

[0012]

The camera according to the present invention comprises:
In a camera that uses a film cartridge having a film having a magnetic recording portion and a means for determining and displaying the exposure state of at least "partly exposed" and "all exposed", the film is pulled out from the film cartridge for shooting. Rewinding means for rewinding the film, setting means for setting the display of the exposure state display means provided on the film cartridge, magnetic recording means for magnetically recording information on the magnetic recording section provided on the film, The magnetic recording means has a judging means for judging whether or not it is operating normally, and when the film is rewound in a state of "partially exposed frame", the setting means is When the judgment means judges that the operation of the magnetic recording means is normal, the indication of the exposure state of the film is "partially exposed".
And the determination means determines that the operation of the magnetic recording means is abnormal, the display of the exposure state of the film is set to "all frames exposed". The judging means has a magnetic reading means for reading the information of the magnetic recording section during the film rewinding drive, and judges whether the magnetic recording means is normal or abnormal based on the output of the magnetic reading means. .

Further, in a camera using a film cartridge having a film having a magnetic recording portion and means for discriminating and displaying at least "partly exposed frame" and "all exposed frame", the film cartridge is photographed. Rewinding means for rewinding the film drawn out from the film, magnetic recording means for magnetically recording information on the magnetic recording portion provided on the film, and drive for setting and driving the exposure state display means provided on the film cartridge. Means, position detecting means for detecting the position of the exposure state display, magnetic reading means for reading the information of the magnetic recording means at the time of film rewinding drive, and the magnetic recording means for normally operating the magnetic recording means. It has a judgment means to judge whether or not the film is rewound in the state that "the film has been partially exposed" When this is done, the drive means by the position detection means, when the determination means determines that the operation of the magnetic recording means is normal, displays the exposure state of the film as "partially exposed". When the setting drive is performed and the determining means determines that the operation of the magnetic recording means is abnormal, the display of the exposure state of the film is set and driven as "all frames exposed". .

[0014]

In a camera using a film cartridge having a film having a magnetic recording portion, and a means for discriminating and displaying the exposure state of at least "partly exposed" and "all exposed", the film cartridge is used for shooting. When the judging means judges that the operation of the magnetic recording means is normal when the drawn-out film is rewound by the rewinding means in the state of “partially exposed frame”, the setting is made. The means sets the display of the exposure state of the film to "partially exposed frame", and when the determining means determines that the operation of the magnetic recording means is abnormal, the setting means determines the exposure of the film. Set the status display to "all frames have been exposed".

The above-mentioned judging means reads the information of the magnetic recording portion on the film by the magnetic reading means during the film rewinding drive, and judges whether the magnetic recording means is normal or abnormal based on the output of this magnetic reading means. .

Further, in a camera which uses a film cartridge having a film having a magnetic recording portion and a means for discriminating and displaying at least "partly exposed frame" and "all exposed frame", the film cartridge is photographed. When the judgment means judges that the operation of the magnetic recording means is normal when the film drawn out from the film is rewound by the rewinding means in the state of “partially exposed frame”, The drive means by the detection means sets the display of the exposure state of the film to "partially exposed frame", and when the determination means determines that the operation of the magnetic recording means is abnormal, the drive means by the position detection means The means sets and drives the display of the exposure state of the film as "all frames have been exposed".

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a perspective view showing a main part of a camera of a first embodiment of the present invention. In FIG. 1, parts other than those relating to the present invention are omitted in order to avoid complication of the drawing, and only main parts of the present invention are shown.

Further, the film cartridge 1 applied to the first embodiment is such that the exposure state of the film cartridge disclosed in US Pat. No. 5,200,777, that is, the film contained in the film cartridge is displayed. The film cartridge described above is applied, and detailed description of the structure and operation of the mechanism is omitted.

As shown in FIG. 1, a film-shaped cartridge 1 having a cylindrical shape is provided with a cartridge shaft 2 which is rotatably supported and around which a film is wound. At the upper end of
An exposure state display window 3 which is an exposure state display means is provided. In the exposure state display window 3, the exposure state of the film stored in the film cartridge 1, that is, the "unexposed" state in which the film stored in the film cartridge is not exposed at all, the photograph Since the film is rewound during shooting, the roll film is exposed to the middle of the film in the "partly exposed" state, or after all the frames have been exposed. Each exposure state of the film such as the "all frames exposed" state that has been rewound is displayed, and by the display of the exposure state of this film,
Information about the exposure state of the film is transmitted to a photographer, a camera body, a developing device, or the like.

On the other hand, a cartridge receiving shaft 4 integrally formed with a rewinding knob 5 which is a film rewinding means provided in a camera body (not shown) is provided at one end of the camera body. A film cartridge chamber (not shown) is rotatably supported on the ceiling or floor of the chamber. When the film cartridge 1 is loaded in the film cartridge chamber, the cartridge receiving shaft 4 and the cartridge shaft 2 of the film cartridge 1 are engaged with each other. By rotating the return knob 5 in the direction of the arrow 5a in FIG. 1, the cartridge shaft 2 is rotated, and the film is wound around this, so that the film is rewound into the film cartridge 1. Has become. It should be noted that the rewinding knob 5 has a base portion 5b when the film rewinding operation is not performed, that is, at the time of normal photography.
It is designed to be stored in.

Further, the base portion 5b of the rewinding knob 5 has:
A stop position indicating mark 6 is provided on a part of the outer peripheral side thereof, and a stop position indicating mark 7 is provided on the exterior surface (not shown) of the camera body side facing the stop position indicating mark 6.

In the first embodiment thus constructed, the film contained in the film cartridge 1 loaded in the cartridge chamber of the camera body is sent out of the film cartridge 1 and the film The action when the film is rewound into the film cartridge 1 by the rewind knob 5 after the exposure is performed halfway, and the film cartridge 1
The operation when the camera is reloaded into the camera will be described below.

First, in a camera that does not have a mechanism for performing magnetic recording or the like on a magnetic recording portion or the like attached to the film surface, the film cartridge 1 is loaded into the camera body (not shown). Then, the cartridge shaft 2 and the cartridge receiving shaft 4 are engaged with each other. As a result, the film is fed from the inside of the film cartridge 1 to the outside by a film feeding mechanism or the like (not shown) arranged in the camera body, and the film is fed to the spool shaft (not shown) of the camera body. ) Side is rolled up. Then, at the first frame position of the frame to be photographed, the film feeding mechanism and the like are stopped, and the photographing standby state is set. In this state, a picture is taken, and after the picture is taken and the film surface is exposed, the same operation is repeated again.

After the exposure (photographing) of the frame on the film has been performed to some extent, the film is rewound midway while the unexposed film remains in the film cartridge 1. I shall. That is, as described above, by rotating the rewinding knob 5 in the direction of the arrow 5a in FIG. 1, the cartridge shaft 2 is rotated and the cartridge shaft 2 is rotated.
The film winding operation, that is, the film rewinding operation is started. As a result, the exposed film that has been sent out from the film cartridge 1 into the camera body and wound around the spool shaft provided in the camera body is rewound into the film cartridge 1.

As described above, after all the films are stored in the film cartridge 1, the rewinding knob 5 is used.
Stop position indicating mark 6 provided on the base portion 5b of the camera and the stop position indicating mark 7 provided on the exterior surface of the camera body side.
At a position where and are opposite to each other, the revolving operation of the rewinding knob 5 is stopped. Then, "all frames exposed" is displayed in the exposure state display window 3 of the film cartridge 1. Therefore, this film cartridge 1
After being taken out from the camera body, it is displayed in the exposure state display window 3 as "all frame exposed" regardless of the actual exposure state of the film.

Then, the film cartridge 1 containing the "partially exposed frame" film that has been rewound during the shooting is magnetically attached to, for example, a magnetic recording section attached to the film surface. When the camera is reloaded in a camera equipped with a recording mechanism, the camera first checks the display of the exposure state display window 3 of the film cartridge 1. At this time,
As described above, although the exposure state of the film in the film cartridge 1 reloaded in the camera is "partially exposed", the display of the exposure state display window 3 is "all exposed". Has become.

Here, when it is determined that the display of the exposure state display window 3 of the film cartridge 1 checked by the camera is "all frames exposed", the film feeding operation is prohibited to The feeding of the film in the film cartridge 1 is prohibited, and the exposure operation on the film surface is prohibited.

On the other hand, when the exposure state of the film in the film cartridge loaded in the camera is determined to be, for example, the "unexposed" state in which the film is not exposed, normal film feeding and A film feeding operation such as winding up is performed, and at the same time, a picture taking standby state for performing an exposure operation on the film surface is set.

As described above, according to the first embodiment, the film cartridge 1 in which the "partially exposed frame" film which has been rewound during the exposure is stored.
The display of the exposure state display window 3 of the above is displayed as "all frames exposed", and the exposure state of the film reloaded in the camera is checked by checking the display of the exposure state display window 3 of the film cartridge 1. Since the judgment is made in accordance with the above, it is possible to prevent the failure of accidentally performing unintended double exposure or the like on a frame which has already been exposed.

It should be noted that, in addition to providing visible marks such as the stop position indicating marks 6 and 7 mentioned above, the change in the amount of force of the rewinding knob 5 at the time of rewinding rotation is utilized to make a prescribed position. The same effect can be obtained by applying a click or the like adapted to recognize.

FIG. 2 is a perspective view showing the essential parts of a camera according to the second embodiment of the present invention. In FIG. 2 as well, portions other than those relating to the present invention are omitted in order to avoid complication of the drawing, and only the essential portions of the present invention are shown.

The film cartridge 1A applied to the second embodiment is also housed in the film cartridge disclosed in USP 5200777 or the like, that is, the film cartridge, as in the first embodiment. A film cartridge in which the exposure state of the film is displayed is applied, and detailed description of the structure and operation of the mechanism is omitted.

As shown in FIG. 2, a cylindrical film cartridge 1A is provided with a cartridge shaft 2A which is rotatably supported and on which a film is wound, and the film cartridge 1A. An exposure state display window 3A serving as an exposure state display means is provided at the upper end of the. Further, the film cartridge 1A
In the inside, a data disk 10 which is integrally formed on the upper end side of the cartridge shaft 2A and rotates integrally with the rotation operation of the cartridge shaft 2A is provided, and the upper end of the film cartridge 1A. The portion is provided with a notch 10A at a position facing the portion, and forms a display portion for reading the data of the data disk 10.

By stopping the data disk 10 at a predetermined angular position, the film stored in the film cartridge 1A is exposed, that is, "unexposed" and "partially framed". Each of the exposure states of the film, such as the "exposed state" or the "all frame exposed" state, indicates the exposure state display window 3A and the notch portion
By displaying the exposure state of the film, information about the exposure state of the film is transmitted to the photographer, the camera body, the developing device, and the like. .

Further, the angular position of the data disk 10 is detected by the reading means 11 which is a position detecting means for detecting the position of the exposure state display, and the information is read by the reading means 11 and the electric information. Are connected to each other, are arranged in the camera body, and are transmitted to the microcomputer 12 that controls the operation of the entire camera. Further, a rewinding detecting means 13 is provided in the camera body, and when the rewinding operation of the film is detected by this, the information is also transmitted to the microcomputer 12.

On the other hand, a cartridge receiving shaft 8 is rotatably supported by a ceiling or floor of a film cartridge chamber (not shown) provided at one end of a camera body (not shown). The cartridge receiving shaft 8 is connected to a drive motor 9 which is a drive source arranged in the camera body via a driving force transmitting means formed by a gear train or the like. 9 is controlled by the microcomputer 12.

When the film cartridge 1A is loaded in the film cartridge chamber, the cartridge receiving shaft 8 and the cartridge shaft 2A of the film cartridge 1A are engaged with each other. When the drive motor 9 is controlled by the computer 12 and the drive motor 9 is rotationally driven,
By rotating the cartridge shaft 2A and winding the film around it, the film is rewound into the film cartridge 1A.

In the second embodiment thus constructed, when the film which has been exposed to the halfway of the film cartridge 1A loaded in the cartridge chamber of the camera body is rewound midway, The operation and the operation when the film cartridge 1A is reloaded in the camera will be described below.

First, as in the first embodiment described above, in a camera which does not have a mechanism for performing magnetic recording or the like on the magnetic recording portion or the like attached to the film surface, the camera body (not shown) is used. 2) is loaded with the film cartridge 1A, the cartridge shaft 2A and the cartridge receiving shaft 8 are engaged with each other. As a result, the film is fed out from the inside of the film cartridge 1A by the film feeding mechanism or the like (not shown) arranged in the camera body, and the film is fed to the spool shaft (not shown) of the camera body. ) Side is rolled up. Then, at the first frame position of the frame to be photographed, the film feeding mechanism and the like are stopped and the photographing standby state is set. A photograph is taken from this state, and after the photograph is taken and the film surface is exposed, the same operation is repeated again.

After the exposure (photographing) of the frame on the film is performed to some extent, the film is rewound midway while the unexposed film remains in the film cartridge 1A. And That is, the film rewinding operation is performed by the photographer, so that the rewinding detecting means 13 is operated.
Transmits the signal output to the microcomputer 12. Then, the microcomputer 12 rotates the drive motor 9 in the rewinding direction based on the output signal. As a result, when the cartridge shaft 2 is rotated, the film winding around the cartridge shaft 2, that is, the film rewinding operation is started. As a result, the exposed film that has been sent out from the film cartridge 1A into the camera body and wound around the spool shaft provided in the camera body is rewound into the film cartridge 1A.

Further, by the rewinding detection means 13,
When it is detected that the film in the "partially exposed frame" state has been rewound into the film cartridge 1A,
The microcomputer 12 has the reading means 1
The monitoring of the angular position of the data disk 10 is started via 1, and the "all frame exposed" film state is displayed in the exposure state information display window 3A.
Then, when the data disk 10 reaches a predetermined angular position, the rotational drive of the drive motor 9 is stopped to stop the film rewinding operation.

Then, the film cartridge 1A,
That is, in order to perform magnetic recording, for example, on the film cartridge 1A that is rewound during shooting and stores the "partially exposed frame" film, for example, on a magnetic recording unit attached to the film surface. When the camera is equipped with the mechanism of No. 1, the exposure state of the film in the film cartridge 1A reloaded in the camera is "partially frame exposed" as in the first embodiment. Nevertheless, since the display of the exposure state display window 3 is "all frames have been exposed", the camera prohibits the film feeding operation, thereby prohibiting the feeding of the film in the film cartridge 1 and The exposure operation on the surface is prohibited.

As described above, according to the second embodiment, similarly to the first embodiment, the exposure information display window 3A of the film cartridge 1A is used even though the film is exposed halfway. In order to display "all frames exposed", the film cartridge 1A is provided with a mechanism for performing magnetic recording, for example, on a magnetic recording portion or the like attached to the film surface. Even when the camera is reloaded, it is possible to prevent unintended double exposure or the like from being accidentally performed on a frame that has already been exposed.

FIG. 3 is a perspective view showing a main part of a camera according to the third embodiment of the present invention. The camera of the third embodiment has basically the same configuration as that of the second embodiment described above, and therefore, the same members are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 3, a cartridge shaft 2A is rotatably supported in the film cartridge 1A.
The magnetic recording portion 15 formed of, for example, a magnetic recording layer is provided at one end in the width direction of the film 14 wound and stored in
And a writing magnetic head 16 which is a magnetic recording means provided for recording shooting information and the like at a position facing the magnetic recording unit 15 on the camera body (not shown) side, A reading magnetic head 18, which is a magnetic reading means provided to read information such as photographing information recorded by the writing magnetic head 16, is provided.

The write magnetic head 16 and the read magnetic head 18 are respectively the write head drive unit 1.
7. It is electrically connected to the microcomputer 12 via the read head drive unit 19. Then, in response to an instruction signal from the microcomputer 12, the writing magnetic head 16 records necessary photographing information and the like on the magnetic recording portion 15 on the film 14.
Further, the reading magnetic head 18 reads the data such as the photographing information recorded in the magnetic recording unit 15. The microcomputer 12 is also a judgment means for judging whether or not the write magnetic head 16 is normally operating based on the information read by the read magnetic head 18.

In the third embodiment constructed as described above, the film 14 of the film cartridge 1A loaded in the cartridge chamber (not shown) in the camera body is partially rewound during the half exposure. Operation when operation is performed, and this film cartridge 1A
The operation when the camera is reloaded into the camera will be described below.

First, when the film cartridge 1A is loaded into the camera body, as in the second embodiment described above,
At the same time when the cartridge shaft 2A and the cartridge receiving shaft 8 are engaged, a predetermined film automatic feeding (auto loading) is performed by a film feeding mechanism (not shown) arranged in the camera body. .

When a photograph is taken after the camera is in the photography standby state, the film 14 is exposed to light at a predetermined position, and the film feeding mechanism or the like causes the film winding operation. At this time, necessary data such as photographing information is recorded in the magnetic recording portion 15 on the film 14 by the write magnetic head 16.

After the frame of the film 14 has been exposed (photographed) to some extent, the film 14 is rewound midway while the unexposed film remains in the film cartridge 1A. Shall be performed. That is, when the photographer performs the film rewinding operation, the rewinding detection means 13
A signal output is transmitted to the microcomputer 12, and the microcomputer 12 rotates the drive shaft 9 in the rewinding direction on the basis of the output signal to rotate the cartridge shaft 2, thereby rotating the cartridge shaft 2.
The film rewinding operation for winding the film 14 into the film is started. At the same time, the microcomputer 12 causes the reading head 18 to read the data such as the photographing information recorded in the magnetic recording unit 15 of the film 14 via the reading head driving unit 19. .

As a result, the exposed film sent out from the film cartridge 1A into the camera body and wound around the spool shaft provided in the camera body is rewound into the film cartridge 1A.

When the reading magnetic head 18 reads the necessary data, the microcomputer 12 determines that the magnetic recording system of the camera is operating normally, while the reading magnetic head 18 is operated. When the necessary data is not read by the head 18, the microcomputer 12 determines that the magnetic recording system of the camera is not operating normally.

If the microcomputer 12 determines that the magnetic recording system is operating normally, the exposure status information display window 3A of the film cartridge 1A indicates "partially exposed frame". By stopping the film feeding at the angular position where a certain display is performed, the rotation of the data disk 10 is stopped.

If it is determined by the microcomputer 12 that an abnormality has occurred in the magnetic recording system, that is, it is not operating normally, the exposure state information display window 3A of the film cartridge 1A is displayed. The rotation of the data disk 10 is stopped by stopping the film feeding at the angular position for displaying the "all frames have been exposed" state.

Then, in a camera equipped with a mechanism for performing magnetic recording or the like on the magnetic recording portion or the like attached to the film surface, photographing information is recorded on the magnetic recording portion 15 attached on the film 14. And the like, and a mechanism for performing magnetic recording or the like on the magnetic recording unit or the like attached to the film surface of the film cartridge 1A in which the film 14 that has been rewound midway is stored. When the camera is reloaded in the camera, the "partially exposed" display on the exposure state display window 3A of the film cartridge 1A and the magnetic recording portion 15 on the film 14 are displayed.
The film is fed and wound up to the position of the unexposed frame of the film 14 in accordance with the information recorded in (1), and the photo-taking standby state is set.

Further, in a camera equipped with a mechanism for performing magnetic recording or the like on the magnetic recording portion or the like attached to the film surface, recording of photographing information or the like on the magnetic recording portion 15 attached on the film 14 is performed. When it is determined that the information recording or the like is abnormal due to the abnormal recording, the film cartridge 1A containing the film 14 that has been rewound midway is attached to the magnetic recording unit or the like attached to the film surface. On the other hand, when the camera is reloaded in a camera equipped with a mechanism for performing magnetic recording and the like, the film feeding operation is performed by the "all frame exposed" display displayed on the exposure state display window 3A of the film cartridge 1A. By prohibiting, the feeding of the film 14 in the film cartridge 1A is prohibited, and the exposure operation on the surface of the film 14 is prohibited. It is locked. In addition, the film cartridge 1A in which the magnetic recording information is determined to be abnormal
Even when the camera is reloaded into a camera that does not have a mechanism for performing magnetic recording on the magnetic recording section attached to the film surface, the "all frames" is displayed on the exposure state display window 3A of the film cartridge 1A. Since the message "Exposure completed" is displayed, the film feeding operation is similarly prohibited.

As described above, according to the third embodiment, in the camera provided with the mechanism for performing magnetic recording or the like on the magnetic recording portion or the like attached to the film surface,
When the film 14 is rewound midway during the exposure, the recording of the photographing information and the like on the magnetic recording portion 15 attached on the film 14 is read by the reading magnetic head 18, and the magnetic data is read based on this data. When an abnormality occurs in the recording system, the display of the exposure state display window 3A of the film cartridge 1A is set to "all frame exposed" despite the "partly frame exposed" state. When the film cartridge 1A is reloaded in the camera, the film feeding operation is prohibited,
It is possible to prevent a failure of accidentally performing unintended double exposure or the like on a frame that has already been exposed.

[0058]

As described above, according to the present invention, when it is determined that an abnormal operation has been made in a camera that does not support the magnetic recording system or a camera that supports the magnetic recording system, the process is performed halfway. By displaying the exposure status of the film cartridge that contains the film that has been exposed and has been rewound midway as "All frames exposed", this film cartridge is compatible with magnetic recording systems. When reloading into
It is possible to provide a camera that prevents accidents due to accidental double exposure or the like.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a camera according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of a camera according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of a camera according to a third embodiment of the present invention.

[Explanation of symbols]

 1, 1A ... Film cartridge 2, 2A ... Cartridge shaft 3, 3A ... Exposure status display window (exposure status display means) 4, 8 ... Cartridge receiving shaft 5 ... Rewind knob (rewind means) 6, 7 ... Stop position instruction mark 9 ... Drive motor (rewinding means) 10 ... Data disk 11 ... Reading means (position detecting means) 12 ... Microcomputer (judging means) 13 ... Rewinding detecting means 14 ... ... film 15 ... magnetic recording unit 16 ... writing magnetic head (magnetic recording means) 17 ... writing magnetic head driving unit 18 ... reading magnetic head (magnetic reading unit) 19 ... reading magnetic head driving unit

Claims (3)

[Claims] 1. A film for photographing in a camera which uses a film cartridge having a film having a magnetic recording portion and a means for discriminating and displaying at least "partly frame exposed" and "all frame exposed" exposure states. Rewinding means for rewinding the film pulled out from the cartridge, setting means for setting the display of the exposure state display means provided on the film cartridge, and magnetic recording of information on the magnetic recording section provided on the film. It has a magnetic recording means and a judging means for judging whether or not the magnetic recording means is operating normally, and when the film is rewound in the state of "exposure of some frames", The setting means, when the judgment means judges that the operation of the magnetic recording means is normal, displays the exposure state of the film as "partly exposed." Set, when said determination means determines that the operation of the magnetic recording means is abnormal, a camera, characterized in that the display of the exposure condition of the film to set as "fully exposed". 2. The judgment means has a magnetic reading means for reading the information of the magnetic recording portion at the time of film rewinding drive, and judges whether the magnetic recording means is normal or abnormal based on the output of the magnetic reading means. The camera according to claim 1, wherein 3. A camera using a film cartridge having a film with a magnetic recording section, and means for determining and displaying the exposure state of at least "partially frame exposed" and "all frame exposed", the film cartridge being photographed. Rewinding means for rewinding the film drawn out from the film, magnetic recording means for magnetically recording information on the magnetic recording portion provided on the film, and drive for setting and driving the exposure state display means provided on the film cartridge. Means, a position detecting means for detecting the position of the exposure state display, a magnetic reading means for reading the information of the magnetic recording means at the time of film rewinding drive, and the magnetic recording means for normally operating the magnetic recording means. It has a judgment means to judge whether or not the film is rewound in the state that "the film is partially exposed" When this is done, the drive means by the position detection means, when the determination means determines that the operation of the magnetic recording means is normal, displays the exposure state of the film as "partially exposed". When the setting drive is performed and the determining means determines that the operation of the magnetic recording means is abnormal, the display of the exposure state of the film is set and driven as "all frames exposed". camera.