JP3445104B2 - camera - Google Patents

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 shooting 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 unit having a film exposure state such as "unused (unexposed)", "mid-exposure", "exposed", and "developed" as bar code information is provided. A camera using a film cartridge has been commercialized.

In this type of camera, when the midway rewinding switch is turned on, the film exposed halfway is rewound, and when this rewinding operation is completed, the film exposure information on the display section is displayed as " Set to "Exposure on the way" so that the film cartridge can be removed from the camera. When the film cartridge set to the "halfway exposure" is reloaded, when the film is fed, the magnetic information recorded for each photographing frame is read, and if a frame without magnetic information is detected, One frame is rewound as an unexposed frame, and thereafter, it is possible to shoot from the unexposed first frame. As a result, the user can arrange the combination of the photo and the film cartridge by using the film cartridge which is different for each photographing purpose.

[0004]

However, when the number of film cartridges exposed to the middle and taken out increases as described above, it becomes impossible to discriminate which film cartridge was used and what kind of shooting was performed. Even though they were separated, I accidentally used different film cartridges to shoot.

On the other hand, the film cartridge I
There is known a camera capable of confirming the number of frames photographed by the user by setting the D number, but the number of frames photographed is not sufficient for identifying the purpose of photographing.

(Object of the Invention) A first object of the present invention is to provide a reader without feeding a film to an unexposed frame.
-By the film feeding of the part, it is possible to identify what kind of shooting purpose the loaded film cartridge was for.
The aim is to provide a camera that can do so.

[0007]

[0008]

A second object of the present invention is to provide a camera which makes it easier to identify what kind of shooting purpose the film cartridge being loaded was for.

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

[0011]

Means for Solving the Problems In order to achieve the first object, the present invention according to claim 1 provides a method for producing a film on a film when the loaded film cartridge has a film which is exposed halfway. In a camera that feeds a film up to a frame with no magnetic information recorded on the disk, a magnetic writing unit that writes the magnetic information on the film each time the image is taken and an instruction to rewind the film that has been exposed halfway are given.
The magnetic writing means, the film leader
And recording control means for magnetically recording the title information into parts, before
Some feed serial film feed is for a camera having a display control unit that presents a display unit title information recorded to the leader portion of the film.

That is, a rewind instruction is given during the exposure.
Title information is recorded in the leader section of the film.
The film cartridge containing the film
When loaded, the film is fed to the leader section.
By doing so, the title information recorded in the leader section is displayed.

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

Further, in order to achieve the second object, the invention according to claim 2 uses the final title information recorded before the film rewinding as the leader portion of the film so that the title information can be easily recalled. It is supposed to be a magnetic recording camera.

Further, in order to achieve the third object, according to the invention of claim 3 , when the film is exposed to the last frame and automatically rewound, the film is recorded in the leader portion of the film. This is a camera that deletes the title information that exists.

That is, since the title information recorded in the leader section for identifying the purpose of photographing is unnecessary when the final frame is photographed, the title information is erased.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the present invention in detail based on the illustrated embodiments , FIGS.
A reference technology example according to the present invention will be described .

FIG. 1 is a block diagram showing a circuit configuration of a main part of a camera in a reference technology example according to the present invention.
In the figure, 1 is a control circuit composed of a microcomputer or the like, 2a is a film feeding circuit for driving a feeding motor 2b for feeding and rewinding a film, and 3 is a disc-like shape provided in a film cartridge. A film information detection circuit composed of a photoreflector for detecting various information of the film from the bar code information on the display section 4 and a photoreflector for detecting the leading end portion (leader section) of the film and the feeding position of each frame. Film position detection circuit consisting of
5 is a magnetic writing circuit for writing magnetic information to the film, 6
Is a magnetic read circuit for reading the magnetic information of 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 the presence or absence of a film which is turned on when a film cartridge is loaded. A switch, S2 is a release switch, and S3 is an intermediate rewinding switch for rewinding the film in the middle.

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

After step A101 in FIG. 2, the operation when the film cartridge is loaded is started. First,
In step A102, the process waits for the film cartridge to be loaded. That is, the film presence switch S
This step is repeated until 1 is turned on. The film cartridge is loaded and the film presence switch S
When 1 is turned on, the process proceeds to step A103, where the feeding motor 2b is rotated in the rewinding direction via the film feeding circuit 2a, and the "unexposed" and "halfway exposure" are detected from the bar code information from the film information detection circuit 3. , "Exposed", "developed" film exposure information, film sensitivity, maximum number of shots, etc. are detected.

At the next step A104, it is determined whether the film exposure information of the loaded film cartridge is "unexposed". As a result, when it is determined that the film is "unexposed", the process proceeds to step A105, the feeding motor 2b is rotated in the winding direction via the film feeding circuit 2a, and film winding is started. In the following step A106, this step is repeated until the feeding to the first frame proceeds while detecting the output of the film position detection circuit 4. When it is determined that the film has been fed to the first frame, the process proceeds to step A107, and the film feeding circuit 2a is used.
The feeding motor 2b is de-energized through to stop the film feeding.

On the other hand, in step A104, "unexposed"
If it is determined that it is not, the process proceeds to step A108, where it is determined whether the film exposure information of the loaded film cartridge is "halfway exposure". If it is not "halfway exposure", it means that the film is "exposed" or "developed", and therefore the process proceeds to step A109 to prohibit photographing.

If it is determined in step A108 that the exposure is "halfway exposure", the process proceeds to step A110 to start the feeding for setting the leading position of the unexposed frame to the aperture position. The feeding 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 judged from the output of the magnetic reading circuit 6 during the film feeding whether or not there is magnetic information on the film.
If there is magnetic information, the process proceeds to step A112, and the title information included in the magnetic information is output to the title information display circuit 7a and displayed on the LCD 7b. After that, the process proceeds to step A113, it is determined from the output of the film position detection circuit 4 whether or not the feeding of one frame is completed, and 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, it is determined that it is an unexposed frame, step A111 → A1
By repeating 12 → A113 → A111 ..., the title information recorded for each frame is sequentially displayed on the LCD 7b, and the user can confirm this display.

After that, when it is determined in step A111 that the magnetic information is lost, the process proceeds to step A114, and the end of the feeding of one frame is detected from the output of the film position detection circuit 4. Then, when the end of the feeding of one frame is detected, the process proceeds to step A115, the film feeding by the feeding motor 2b is stopped through the film feeding circuit 2a, and the unexposed frame is detected in the following step A116. Film feeding circuit 2a for rewinding one frame that has been fed too much for
The feeding motor 2b is energized in the reverse direction via the, and film rewinding is started. Then, the next step A11
In step 7, it is judged from the output of the film position detection circuit 4 whether or not the rewinding of one frame is completed. When the rewinding of one frame is completed, the process proceeds to step A118, and the film feeding circuit 2a
The power supply to the feeding motor 2b is cut off via and the rewinding is stopped.

According to the above-mentioned reference technology example , only by loading the “halfway exposure” film cartridge into the camera, the title at the time of shooting with the film cartridge is displayed, so that the shooting purpose of each film cartridge is identified. -Not only can you confirm it, but title information is displayed one by one during feeding of unexposed frames, so no special operation or extra time is required.

FIG. 3 (a form status of the Embodiment) of the present invention
FIG. 2 is a block diagram showing a main configuration of a camera according to one embodiment, which differs from FIG. 1 only in that a title information storage unit 8 including a memory for storing magnetically recorded title information is provided.

FIG. 4 and FIG. 5 are flowcharts showing the operation of the main part of the camera of one embodiment of the present invention. The circuit configuration of the camera is the same as that shown in FIG.

FIG. 4 is a flow chart in a normal photographing enabled state after the film cartridge is loaded in the camera.

In FIG. 4, in step B101, a film cartridge is loaded and the first frame of photographing is set to the aperture position. From this state, step B
The process proceeds to 102 and waits until the release switch S2 is turned on. When the release switch S2 is turned on, the process proceeds to step B103 to perform shooting operations such as autofocus and exposure control, and in the next step B104, the film feeding circuit 2a and the feeding motor 2b start feeding one frame. To do.

At the next step B105, magnetic writing including the title information is performed by the magnetic writing circuit 5.
After that, the process proceeds to step B106, where it is determined whether the film position detection circuit 4 has finished feeding one frame.
When the feeding of one frame is completed, the process proceeds to step B107, the film feeding by the film feeding circuit 2a and the feeding motor 2b is stopped, and in the following step B108, the title information magnetically recorded is stored in the title information storage unit 8 Remember.
In the next step B109, it is determined whether or not the photographed frame is the last frame of the film, and if it is not the last frame, the process returns to step B102 and the same operation is repeated.

Steps B102 to 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.

When the release switch S2 is not turned on in step B102, the process proceeds to step B110, and it is determined whether the midway rewind switch S3 is turned on. If the midway rewinding switch S3 is not turned on, the process returns to step B102, but if it is turned on, the process proceeds to step B111 to start film rewinding by the film feeding circuit 2a and the feeding motor 2b. Then, in step B112, it is determined from the output of the film position detection circuit 4 whether or not the rewinding has been performed to the leader portion of the film. If the rewinding has been performed to the leader portion, the process proceeds to step B113 and the above step B
At 108, the final title information stored in the title information storage section 8 is recorded in the reader section by the magnetic writing circuit 5.

Thereafter, the process proceeds to step B114, where it is determined that the rewinding of the film is completed, and when it is determined that the rewinding is completed, the process proceeds to step B115 where the rewinding is stopped by adjusting the output timing of the film information detection circuit 3. As a result, the film exposure information of the film cartridge is set to "halfway exposure".

Although it is in the middle of the description of FIG. 4, FIG.
With reference to a flowchart of the operation of the time of film cartridge loading in the embodiment of the present invention.

[0042] step C101~C109, said participants
In considered art example, in FIG. 2, step A101~A109
Since it is the same as, the description thereof will be omitted.

"Half exposure" in step C108 of FIG.
If it is determined that the other film cartridge has been loaded, the process proceeds to step C110, and the film feeding circuit 2a
And 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 reading circuit 6, and in the following step C112, it is rewound midway to the LCD 7b via the title information display circuit 7a. Display previous last title information. After that, the process proceeds to Step C113, the film is fed until the first frame is detected by the film position detection circuit 4, and the film feeding is once stopped at Step C114. In this state, LCD 7b
Since the final title information before rewinding is displayed in,
From the title information, you can slowly remember what you shot with the film cartridge.

As a result of checking the title information, if the user wants to continue shooting with the film cartridge, the user will press the release button S2, but step C1
When it is detected that the release button S2 is ON in step 15, the process proceeds to step C116, and the film feeding by the film feeding circuit 2a and the feeding motor 2b is continued. Then, in the next steps C117 to C123,
Almost the same operation as that in steps A111 to A118 in the above-described reference technology example (except that title information is not displayed for each frame) is executed.

When the film cartridge is taken out only by confirming the title information without taking a picture thereafter, it suffices to press the midway rewind switch S3 instead of the release switch S2. When the user performs such an operation, the release is performed. Since the switch S2 is OFF and the midway rewind switch S3 is ON, the operation is 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 "halfway 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 of the film. Then, in the next step B117, if rewinding to the leader portion is detected, step B1
18, the extra title magnetic information written in step B113 is erased by the magnetic writing circuit 5,
In the following step B119, the end of film rewinding is awaited. When the end of film rewinding is detected, the process proceeds to step B120, and the exposure information of the film cartridge is set to "exposed".

[0047] According to the shape condition of the above-described, the leader portion of the film, since so as to record the final title before returning middle winding, until the reader unit by loading the film cartridge of the "partially exposed" Just let me feed you
The shooting status can be confirmed in a short time.

Further, by displaying the title information magnetically recorded on the film, it becomes easy to identify the "halfway exposed" film cartridge. Further, in the title information display, the title information for each photographing frame can be confirmed during feeding to the unexposed frame, so that the film cartridge can be more accurately identified. Furthermore, by recording the title information in the leader section of the film,
At the time of reloading, the title information can be confirmed only by feeding the leader portion of the film.

Although the final title before rewinding on the way is recorded in the leader section of the film, the title of arbitrary characters set by the user is recorded, and "New Year holidays", "Summer holidays", "Christmas holidays" are recorded. By preferentially recording a title corresponding to a seasonal event such as “” in the reader unit, it is possible to make the shooting information easier to remember.

(Correspondence between Invention and Embodiment)
In shape state, the magnetic writing means of the present invention is magnetic Kishokomi circuit 5, the display means of the title information display circuit 7a and LCD7b is present invention, the display control circuit 1 and the title information storage unit 8 of the present invention The control circuit 1 corresponds to the control means, and corresponds to the recording control means of the present invention.

The above is the correspondence relationship between each configuration of the embodiments and each configuration of the present invention, but the present invention is not limited to the configurations of these embodiments, and the functions shown in the claims,
It goes without saying that any structure may be used as long as the functions of the embodiments can be achieved.

[0052]

As described above, according to the present invention , a reader can be used without feeding a film to an unexposed frame.
-By the film feeding of the part, it is possible to identify what kind of shooting purpose the loaded film cartridge was for.
A camera that can do so can be provided.

[0053]

[0054]

Further, according to the present invention, it is an object of the present invention to provide a camera capable of more easily identifying what kind of photographing purpose the film cartridge being loaded was for.

Further, according to the present invention, it is intended to provide a camera capable of erasing unnecessary title information.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic circuit configuration of a camera in a reference technology example according to the present invention.

FIG. 2 is a flowchart showing an operation when a film cartridge of a camera is loaded in a reference technology example according to the present invention.

3 is a block diagram showing a schematic circuit configuration of a camera according to an embodiment of the present invention.

FIG. 4 is a flowchart showing an operation during normal shooting of the camera of one embodiment of the present invention.

5 is a flowchart showing the operation at the time of the film cartridge loading of a camera according to an embodiment of the present invention.

[Explanation of symbols]

1 control circuit 2a Film feeding circuit 2b feeding motor 5 Magnetic writing circuit 6 Magnetic read circuit 7a Title information display circuit 7b LCD 8 Title information display section

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03B 17/24 GAP G03B 1/60 GAP G03B 17/00 GAP G03B 17/18 GAP

Claims (3)

(57) [Claims] 1. A camera for feeding a film up to a frame having no magnetic information recorded on the film when the loaded film cartridge has a film exposed to the middle of the film. A magnetic writing unit that writes magnetic information and a partially exposed
When a film rewinding instruction is issued, recording control means for magnetically recording title information on the leader portion of the film by the magnetic writing means, and a film feeding means during film feeding are provided.
A means for displaying the title information recorded in the leader section of RUM
Camera, characterized in that a display control unit that presents to. 2. A magnetic recording is made on the leader portion of the film.
The camera according to claim 1 , wherein the title information is final title information recorded before rewinding . 3. A film is automatically wound by exposing up to the last frame of the film.
Recorded on film leader when rewound
Claim 1, wherein the camera, characterized in that to erase the title information that is.