JPH1138497A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate identification meaning for which photographing purpose a film cartridge loaded is used by reading title information magnetically recorded on film and displaying the title information read. SOLUTION: In the case of discriminating that it is the film cartridge exposed halfway, the winding of the film is started by rotating a feeding motor 2b in the winding direction of the film through a film feeding circuit 2a so that feeding to set the top position of an unexposed frame at an aperture position is started. Then, it is discriminated whether the magnetic information exists on the film or not from the output of a magnetic reading circuit 6 while feeding the film. In the case that the magnetic information exists, the title information included in the magnetic information is outputted to a title information display circuit 7a and is displayed on an LCD 7b. Thus, a title at the time of photographing by using the film cartridge is displayed only by loading the film cartridge exposed halfway at the camera.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera capable of continuing photographing from an unexposed frame when a partially exposed film cartridge is loaded.

[0002]

2. Description of the Related Art In recent years, a disk-shaped display portion having film exposure states such as "unused (unexposed)", "intermediate exposure", "exposed", and "developed" has been provided as bar code information. Cameras using film cartridges have been commercialized.

In this type of camera, when the rewind switch is turned on halfway, the film that has been exposed halfway is rewound, and when this rewinding operation is completed, the film exposure information on the display unit is displayed as " Set to "intermediate exposure" to allow the film cartridge to be taken out of the camera. Then, when the film cartridge set in the "intermediate exposure" is reloaded, the magnetic information recorded for each photographing frame is read at the time of film feeding, and a frame having no magnetic information is detected. One frame is rewound as an unexposed frame, and thereafter, it is possible to shoot from the unexposed top frame. Thus, the user can prepare a combination of a photograph and a film cartridge by using a different film cartridge for each photographing purpose.

[0004]

However, as the number of film cartridges that have been partially exposed and taken out as described above increases, it becomes impossible to determine which film cartridge has been used and what kind of shooting has been performed. Sometimes I accidentally shot different film cartridges even though they were separated.

On the other hand, the film cartridge I
A camera is known in which a user can confirm the number of shot frames by setting a D number, but the number of shot frames alone is not sufficient for identifying a shooting purpose.

(Object of the Invention) A first object of the present invention is to provide a camera capable of easily distinguishing what kind of photographing purpose the loaded film cartridge is for. It is.

A second object of the present invention is to provide a camera capable of confirming title information during a search for unexposed frames.

A third object of the present invention is to determine what kind of photographing purpose the loaded film cartridge is for until the film is fed to the leader section without feeding the film to the unexposed frame. It is an object of the present invention to provide a camera capable of performing identification.

A fourth object of the present invention is to provide a camera capable of easily identifying what kind of photographing purpose the loaded film cartridge is for.

A fifth object of the present invention is to provide a camera capable of deleting unnecessary title information.

[0011]

In order to achieve the first object, according to the present invention, when a loaded film cartridge has a partially exposed film, the film cartridge may have a partially exposed film. A camera for feeding a film up to a frame having no magnetic information recorded in the camera has magnetic reading means for reading title information magnetically recorded on the film, and title information displaying means for displaying the read title information. Camera.

That is, the title information magnetically recorded on the film is displayed to inform the user.

Further, in order to achieve the second object,
According to a second aspect of the present invention, there is provided a display control for sequentially displaying title information recorded for each frame on the display means during film feeding for each frame until the magnetic information recorded on the film is lost. It is a camera having means.

That is, the title information for each frame is displayed at the same time as the film is being fed to search for an unexposed frame having no magnetic information.

In order to achieve the third object,
According to a third aspect of the present invention, there is provided a camera having display control means for displaying title information recorded on a film leader on a display means.

In order to achieve the second object,
According to a fourth aspect of the present invention, there is provided a camera having magnetic writing means for writing magnetic information on a film, and recording control means for causing the magnetic writing means to magnetically record title information for each photographic frame. Things.

That is, the title information is magnetically recorded for each photographic frame, and the film feed for searching for unexposed frames without magnetic information is performed when the film of the film cartridge is rewound halfway and reloaded. During transmission, title information for each frame can be displayed at the same time.

In order to achieve the third object,
The present invention according to claims 5 and 6 is characterized in that the magnetic writing means for writing magnetic information on the film and the magnetic writing means when the rewind instruction of the halfway exposed film is given. The camera has a recording control means for magnetically recording the title information in the reader section.

That is, when the film is rewound in the middle of the exposure, the title information is recorded in the film leader, and when the film cartridge is loaded again, the film is fed to the film leader. By doing
The title information of the film cartridge can be displayed.

In order to achieve the fourth object,
According to a sixth aspect of the present invention, there is provided a camera for magnetically recording the final title information recorded before rewinding the film in a leader portion of the film so that the title information can be easily remembered.

In order to achieve the fifth object,
According to a seventh aspect of the present invention, there is provided a camera for erasing title information recorded in a leader section of a film when the last frame of the film is exposed and automatic rewinding is performed.

That is, when the last frame has been photographed, the title information of the leader section recorded for identifying the purpose of photographing becomes unnecessary and is deleted.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a block diagram showing a circuit configuration of a main part of a camera according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a control circuit composed of a microcomputer or the like, and 2a denotes a film. A film feeder circuit for driving a feed motor 2b for feeding and rewinding a film; a photoreflector 3 for detecting various types of film information from barcode information on a disk-shaped display unit provided in the film cartridge; A film position detecting circuit 4 comprising a photoreflector for detecting the leading end (leader portion) of the film and a feeding position for each frame;
Is a magnetic writing circuit for writing magnetic information on the film, 6 is a magnetic reading circuit for reading magnetic information on the film, 7a is a title information display circuit for displaying title information on a display, for example, an LCD (liquid crystal display) 7b, and S1. Is a film presence / absence switch that is turned on when a film cartridge is loaded, S2 is a release switch, and S3 is a halfway rewind switch for rewinding the film halfway.

FIG. 2 is a flow chart showing the operation of the main part of the camera having the above configuration.

The operation when the film cartridge is loaded is started from step A101 in FIG. First,
In step A102, the process waits for a film cartridge to be loaded. That is, the film presence / absence switch S
This step is repeated until 1 turns ON. When a film cartridge is loaded and the film presence / absence switch S
When 1 is turned on, the process proceeds to step A103, in which the feed motor 2b is rotated in the rewinding direction via the film feed circuit 2a, and "unexposed" and "intermediate exposure" are obtained from the bar code information from the film information detection circuit 3. , "Exposed", "developed", film sensitivity, maximum number of photographed images, and the like.

In the next step A104, it is determined whether or not the film exposure information of the loaded film cartridge is "unexposed". As a result, if it is determined that the film is not exposed, the process proceeds to step A105, in which the feeding motor 2b is rotated in the winding direction via the film feeding circuit 2a, and the winding of the film is started. In a succeeding step A106, this step is repeated while the output of the film position detecting circuit 4 is detected until the feeding of the first frame is advanced. When it is determined that the film feeding has advanced to the first frame, the process proceeds to step A107, and the film feeding circuit 2a
Then, the power supply to the feed motor 2b is cut off via the, and the film feed is stopped.

On the other hand, in step A104, "unexposed"
If not, the process proceeds to step A108, where it is determined whether or not the film exposure information of the loaded film cartridge is "intermediate exposure". If the exposure is not "intermediate exposure", the film is "exposed" or "developed", and the flow advances to step A109 to inhibit photographing.

If it is determined in step A108 that the exposure is "halfway exposure", the flow advances to step A110 to start feeding for setting the leading position of the unexposed frame to the aperture position. The feed motor 2b is rotated in the film winding direction via the circuit 2a to start film winding. Then, the next step A1
At 11, it is determined whether or not there is magnetic information on the film from the output of the magnetic reading circuit 6 during the film feeding.
If there is magnetic information, the process proceeds to step A112, where the title information included in the magnetic information is output to the title information display circuit 7a and displayed on the LCD 7b. Thereafter, the process proceeds to step A113, where it is determined whether or not the feeding of one frame is completed based on the output of the film position detection circuit 4. When the feeding of one frame is completed, the process returns to step A111, and the same operation is repeated. .

Therefore, until there is no magnetic information, that is, until it is determined that the frame is an unexposed frame, steps A111 → A1.
12 → A113 → A111... Are repeated, and the title information recorded for each frame is sequentially displayed on the LCD 7b, so that the user can confirm this display.

Thereafter, if it is determined in step A111 that the magnetic information has been lost, the flow advances to step A114 to detect the end of feeding of one frame from the output of the film position detection circuit 4. When the end of feeding of one frame is detected, the process proceeds to step A115, in which the feeding of the film by the feeding motor 2b is stopped via the film feeding circuit 2a, and in step A116, the unexposed frame is detected. Film feeding circuit 2a for rewinding one frame that has been excessively fed for
, The feed motor 2b is energized in the reverse direction to start film rewinding. Then, the next step A11
In step 7, it is determined whether or not the rewinding of one frame has been completed from the output of the film position detecting circuit 4. If the rewinding of one frame has been completed, the process proceeds to step A118, where the film feeding circuit 2a
Then, the power supply to the feed motor 2b is cut off via, and the rewinding is stopped.

According to the first embodiment described above, the title of the film taken with the film cartridge is displayed by simply loading the "halfway exposed" film cartridge into the camera. Not only can the purpose be identified and confirmed, but also title information is displayed one by one during feeding of unexposed frames, so that no special operation or extra time is required.

(Second Embodiment) FIG. 3 is a block diagram showing a main configuration of a camera according to a second embodiment of the present invention. The difference from FIG. The only difference is that a title information storage unit 8 including a memory for storing is provided.

FIGS. 4 and 5 are flowcharts showing the operation of the main part of the camera according to the second embodiment of the present invention. Note that the circuit configuration of the camera is the same as that of FIG.

FIG. 4 is a flowchart in a normal photographable state after the film cartridge is loaded in the camera.

In FIG. 4, step B101 is a state where the film cartridge is loaded and the first frame to be photographed is set at the aperture position. Step B from this state
Proceed to 102 and wait for the release switch S2 to be turned on. When the release switch S2 is turned on, the flow advances to step B103 to perform a photographing operation such as autofocus and exposure control. In the next step B104, the feeding of one frame is started by the film feeding circuit 2a and the feeding motor 2b. I do.

In the next step B105, magnetic writing including title information is performed by the magnetic writing circuit 5.
Thereafter, the flow advances to step B106 to determine whether or not the feeding of one frame by the film position detection circuit 4 has been completed.
When the feeding of one frame is completed, the process proceeds to step B107, in which the film feeding by the film feeding circuit 2a and the feeding motor 2b is stopped, and in step B108, the title information recorded magnetically is stored in the title information storage unit 8. To memorize.
In the next step B109, it is determined whether or not the photographed frame is the last frame of the film. If it is not the last frame, the process returns to step B102 and the same operation is repeated.

Step B102 to step B10
By repeating the operations up to 9, the last recorded title information is stored in the title information storage unit 8 (because the title information is updated and recorded) and remains.

If the release switch S2 has not been turned on in step B102, the process proceeds to step B110, where it is determined whether the rewind switch S3 has been turned on. If the midway rewind switch S3 is not ON, the process returns to step B102. If it is ON, the process proceeds to step B111 to start rewinding the film by the film feeding circuit 2a and the feeding motor 2b. In step B112, it is determined whether or not the film has been rewound to the leader of the film based on the output of the film position detection circuit 4. If the film has been rewound to the leader, the process proceeds to step B113.
At 108, the final title information stored in the title information storage unit 8 is recorded in the reader unit by the magnetic writing circuit 5.

Thereafter, the flow advances to step B114 to determine that the rewinding of the film is completed. If it is determined that the rewinding is completed, the flow advances to step B115 to stop the rewinding by adjusting the output timing of the film information detecting circuit 3. Thereby, the film exposure information of the film cartridge is set to "intermediate exposure".

While the description of FIG. 4 is being made, the operation of loading the film cartridge according to the second embodiment of the present invention will be described with reference to the flowchart of FIG.

Steps C101 to C109 correspond to steps A101 to A1 of FIG. 2 in the first embodiment.
09, and a description thereof will be omitted.

In step C108 of FIG. 5, "intermediate exposure"
If it is determined that the film cartridge is loaded, the process proceeds to step C110, where the film feeding circuit 2a
Then, the feeding of the film is started by the feeding motor 2b.
Then, in the next step C111, the magnetic information of the reader section recorded in step B113 of FIG. 4 is read by the magnetic readout circuit 6, and in the following step C112, it is rewound halfway to the LCD 7b via the title information display circuit 7a. Displays the previous last title information. Thereafter, the flow advances to step C113 to feed the film until the first frame is detected by the film position detection circuit 4, and the film feeding is stopped once in step C114. In this state, the LCD 7b
Since the last title information before rewinding is displayed in
It is possible to slowly recall the content shot with the film cartridge from the title information.

As a result of checking the title information, if the user wants to continue shooting with the film cartridge, the user presses the release button S2.
If the release button S2 is detected to be ON in step 5, the flow advances to step C116 to continue film feeding by the film feeding circuit 2a and the feeding motor 2b. Then, in steps C117 to C123, substantially the same operation as that in steps A111 to A118 in the first embodiment (except that title information is not displayed for each frame) is executed. I do.

If the user wants to remove the film cartridge only after confirming the title information without taking a picture, he or she has to press the rewind switch S3 instead of the release switch S2. Since the switch S2 is OFF and the intermediate rewind switch S3 is ON, the operation is performed in steps C115 → C124 → C
Proceed to 125. Then, in step C125,
When the rewinding of the film is started, and the end of the rewinding is detected in the next step C126, the process proceeds to step C127, and the film exposure information of the film cartridge is set to “intermediate exposure”.
Set to.

Returning to the flowchart of FIG. 4 again, if it is detected in step B109 that the shooting of the last frame of the film has been completed, the process proceeds to step B116 to start rewinding the film. Then, in the next step B117, when rewinding to the leader portion is detected, step B1 is executed.
The program proceeds to step 18, wherein the extra title magnetic information written in step B113 is erased by the magnetic writing circuit 5,
In a succeeding step B119, the process stands by for the end of the film rewinding. When the end of the film rewinding is detected, the process proceeds to step B120, and the exposure information of the film cartridge is set to “exposed”.

According to each of the above embodiments, the final title before rewinding is recorded in the leader portion of the film. Therefore, the film cartridge of "intermediate exposure" is loaded and the supply of the leader portion is performed. Just by sending the document, you can check the shooting status in a short time.

By displaying the title information magnetically recorded on the film, the "halfway exposed" film cartridge can be easily identified. In the title information display, the title information of each photographed frame can be confirmed during the feeding to the unexposed frames, so that the film cartridge can be more accurately identified easily. Furthermore, by recording the title information in the film leader,
At the time of reloading, title information can be confirmed only by feeding the film leader.

Although the final title before rewinding is recorded in the film leader, the title of an arbitrary character set by the user can be recorded, and the title can be set to "New Year", "Summer vacation", "Christmas holiday". By preferentially recording a title corresponding to a seasonal event such as "" in the leader unit, it is possible to make it easier to remember shooting information.

(Correspondence between the Invention and the Embodiments) In each of the above embodiments, the magnetic information reading circuit 6 corresponds to the magnetic reading means of the present invention, and the magnetic writing circuit 5 corresponds to the magnetic writing means of the present invention. The circuit 7a and the LCD 7b correspond to the display unit of the present invention, the control circuit 1 and the title information storage unit 8 correspond to the display control unit of the present invention, and the control circuit 1 corresponds to the writing control unit of the present invention.

The correspondence between the components of the embodiment and the components of the present invention has been described above. However, the present invention is not limited to the configuration of the embodiment, and the functions and functions described in the claims are not limited.
Needless to say, any configuration may be used as long as the functions of the embodiment can be achieved.

[0052]

As described above, according to the present invention,
It is possible to provide a camera that can easily identify what kind of photographing purpose the loaded film cartridge is for.

Further, according to the present invention, it is possible to provide a camera capable of confirming title information while searching for unexposed frames.

Further, according to the present invention, even if the film is not fed to an unexposed frame, it is possible to identify what kind of photographing purpose the loaded film cartridge is for until the film is fed to the leader section. It is possible to provide a camera capable of performing the following.

Further, according to the present invention, it is an object of the present invention to provide a camera capable of making it easier to identify what kind of photographing purpose the loaded film cartridge is for.

Further, according to the present invention, there is provided a camera capable of erasing unnecessary title information.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic circuit configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the camera according to the first embodiment of the present invention when a film cartridge is loaded.

FIG. 3 is a block diagram illustrating a schematic circuit configuration of a camera according to a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation of a camera according to a second embodiment of the present invention during normal shooting.

FIG. 5 is a flowchart showing an operation of the camera according to the second embodiment of the present invention when a film cartridge is loaded.

[Explanation of symbols]

 Reference Signs List 1 control circuit 2a film feeding circuit 2b feeding motor 5 magnetic writing circuit 6 magnetic reading circuit 7a title information display circuit 7b LCD 8 title information display section

Claims (7)

[Claims] When a loaded film cartridge has a partially exposed film, a camera which feeds a film to a frame having no magnetic information recorded on the film has a magnetically recorded film on the film. A magnetic reading means for reading the read title information; and a title information display means for displaying the read title information. 2. A display control means for sequentially displaying title information recorded for each frame on the display means during film feeding for each frame until the magnetic information recorded on the film is lost. The camera according to claim 1, wherein: 3. The camera according to claim 1, further comprising display control means for displaying title information recorded on a film leader section on said display means. 4. The apparatus according to claim 1, further comprising magnetic writing means for writing magnetic information on the film, and recording control means for causing said magnetic writing means to magnetically record title information for each photographing frame. 3. The camera according to 1 or 2. 5. A magnetic writing means for writing magnetic information on a film, and when a rewind instruction for a half-exposed film is issued, the magnetic writing means transmits title information to a leader section of the film. 4. The camera according to claim 1, further comprising a recording control unit for performing magnetic recording. 6. The camera according to claim 5, wherein the title information magnetically recorded on the film leader is the last title information recorded before rewinding. 7. The camera according to claim 5, wherein when the last frame of the film is exposed and automatic rewinding is performed, title information recorded in a leader section of the film is erased.