JP2947986B2 - Camera and camera control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera loaded with a film having a magnetic recording section for recording film information, photographing information and the like, and a control device therefor .

[0002]

2. Description of the Related Art A system for recording or reproducing film information such as film sensitivity and photographing information such as the date of photographing is provided in U.S. Pat.
No. 4,332.

In US Pat. No. 4,878,075, film information (unphotographed frame information, photographed frame information, etc.) is reproduced and discriminated, and based on the result, the film is unloaded and reloaded. Proposals have been made to make it possible. Furthermore, the film leader part is stored in the cartridge,
U.S. Pat. No. 4,834,306 proposes a technique in which the film spool is rotated when the camera is loaded so that the film leader portion is exposed from inside the cartridge.

Further, a technology in which a film cartridge is provided with a function of displaying a film use state is disclosed in Japanese Unexamined Patent Publication No.
It is described in JP-A-14248.

[0005]

However [0006] The In the conventional example, when the film cartridge packed with a middle film used is loaded in the camera, a magnetic recording means in front of the camera using this film when the failure or the like due <br/> Ri already captured recorded has not been properly have a problem leading to an accident such as a multiple exposure. An object of the present invention is to provide a multiple exposure of a film in use during reuse.
It is an object of the present invention to provide a camera and a control device thereof that can prevent the accident described above.

[0006]

[0007]

In order to achieve the above object, a first aspect of the present invention is to store information on a use state of a film.
A film with a storage unit that can be stored is loaded
Film car provided with an index indicating the use state of the film
In a camera that can use a cartridge, the cartridge
First reading for reading the use state of the film from the index
Means and use condition of the film from the storage unit of the film
Reading means for reading the information of the film, and the state of use of the film
The first reading means confirms that the state has been partially exposed.
When reading from the index of the cartridge,
The information on the use state of the corresponding film is stored in the second reader.
If the step cannot be read from the storage of the film,
Control means for performing a prohibition process of photographing,
Claim 2 can store information on the use state of the film.
Loaded with a film having a storage unit
Film cartridge with indicators that indicate the usage status of the system
A camera control device that can use
The first reading is to read the use condition of the film from the index of the cartridge.
Taking means and the use condition of the film from the storage unit of the film.
Reading means for reading state information and use of film
The first reading means indicates that the state has been partially exposed.
Is read from the index of the cartridge,
Reading the information on the use state of the film corresponding to the second reading
If the means cannot read from the storage of the film
Has control means for performing a prohibition process of photographing.
You.

[0008]

[0009]

FIG. 1 is a flowchart showing the processing of a camera according to the present invention. FIG. 2 is an exploded perspective view showing a schematic configuration of a mechanism of the camera according to the present invention.
FIG. 3 is a block diagram showing an entire circuit of an electric system of the camera according to the present invention.

First, referring to FIGS. 2 and 3, a description will be given of a mechanism and an electric system of the camera. 2, reference numeral 1 denotes a film F of the perforations P _1, P ₂ detection to the film constant distance feeding make transporting photoreflector, 2 denotes a motor for feeding film disposed in the spool, 3 is decelerated A gear mechanism for switching between winding and rewinding; 4 a fork for rewinding; 5 a magnetic head for writing and reading information to and from a track T on the film F; It is a pressure bonding pad.

The film cartridge C contains a film F
Is stored in a wound state. The film F has a magnetic layer applied on the base side, one side edge of which has a track T on which data such as exposure status and frame number is recorded as magnetic information, and the other side edge has a photographing surface. Perforations P ₁ and P ₂ corresponding to the screen are provided.

Further, on the upper surface of the film cartridge C, the usage status of the film (“unused”, “under use”,
Film usage status mark E indicating "used"
Is provided. Reference numeral 18 denotes a switch for detecting the film use state according to the display state of the film use state display means E.

Next, the configuration of FIG. 3 will be described.

Reference numeral 8 denotes a CPU for controlling the driving of the entire system.
This power is supplied from the battery 7. In addition to the battery 7, the CPU 8 receives a signal detected by the release switch 9 which is turned on at the start of the photographing operation, a feeding circuit 10 for winding and rewinding the film F, and a signal detected by the feeding photoreflector 1. A pulse detection circuit 11 for converting the signal to a signal receivable by the CPU 8, a magnetic information writing circuit 12 for transmitting a signal for recording photographic information on the track T of the film F by the magnetic head 5, and a signal written on the track T of the film F A magnetic reproducing circuit 13 for reading magnetic information, A for performing automatic exposure, automatic focusing, and shutter opening / closing operations
An E / AF / SH circuit 14, an LCD (liquid crystal display) 15 for displaying the frame number of the film F and issuing an abnormality warning, a switch 16 for instructing whether or not to perform photographing even when magnetic recording is not possible, (Light Emitting Diode) 17 for performing lighting display and a switch 18 for detecting a film use state are connected.

Next, an example of processing for achieving the present invention will be described with reference to the flowchart of FIG. 1 and the flowchart of FIG. 4 subsequent to the processing of FIG. In the drawings, "S" appended to the reference numeral indicates a step.

First, whether or not the film cartridge C is loaded is checked by a cartridge presence / absence switch (not shown) (S101). Next, the state of the film use state display means E is determined by the switch 18 to determine whether the loaded film cartridge C has been used (S10).
2). If it has been used, the processing after B in FIG. 4 is executed, and if it has not been used, the film feeding motor 2 is driven to start winding the film F (S103). Then, reproduction of the magnetic information recorded on the track T of the film F is started by the magnetic head 5 and the magnetic reproduction circuit 13 (S1).
04).

Thereafter, the perforations P ₁ , P ₂ are detected by the feeding photoreflector ₁ , and if the prescribed number of perforations for one frame is confirmed (S 105),
A frame count is performed (S106). Then, LCD
The frame number displayed at 15 is counted up (S106). After this processing, and step 1
If the specified perforation number is not confirmed in 05, it is determined whether or not magnetic information has been read by the magnetic reproducing circuit 13 (S107). If the magnetic information has been read, it is determined whether or not the frame is an unphotographed frame (S10).
8). If the frame has not been shot, the film feeding motor 2 is stopped, and the winding of the film F is stopped (S109).
Further, the reproduction of the magnetic information by the magnetic head 5 and the magnetic reproduction circuit 13 is stopped (S110), and the processing after C in FIG. 4 is executed.

On the other hand, if the magnetic information is not read in step 107, the maximum number of frames obtained from the DX code of the film cartridge C is compared with the frame count value, or the perforation is detected for a predetermined period or more. By not being detected, it is determined whether or not the last frame (ie, whether or not the film F has ended) (S11).
1) If it is not the last frame, the flow returns to step 105 to execute the subsequent processing. If it is the last piece, switch 18
, The use state of the film F is determined, and it is determined whether the film F is in use or unused (S112). In this determination, since it is determined in step 102 that it is not already used, it is only necessary to check whether or not it is in use. When not used, no magnetic signal is detected at all, so it is possible that the magnetic reproducing circuit 13 or the magnetic head 5 is defective. Assuming that the magnetic head 5 is defective, there is a possibility that recording of photographing information is not performed due to defective magnetic writing. However, since it is an unused film, it is possible to take a picture. Therefore, an indication that the magnetic information recording is defective is displayed by the LED 17 for the time being. Even if the magnetic recording is defective, the photographer can determine whether or not to perform photographing. If photographing is OK (S117), the release switch 9 is turned on, and the CPU 8 detects the operation of the release switch 9. Then, the film F is set to the first frame (S118). In other words, because we decided to shoot,
When the perforation is detected, the film F is rewound until the frame count becomes 1, and if the film is set to the first frame, the processing after C is executed. On the other hand, if the photographing is to be stopped, the switch 16 is turned on, and this operation is performed by the CPU.
After the detection by step 8, the process proceeds to step 113. In step 113, the entire film F is rewound into the film cartridge C (S113), and the LED 17 and the LCD 15
Displays that the camera has an error (S11).
4). Thereafter, the camera is brought to a service station or the like to repair the camera, and the camera is reset at the time of repair (S115), whereby the process returns to step 101.

Next, the processing of FIG. 4 will be described. This process is executed following steps 110 and 102 in FIG.

First, the on / off state of the release switch 9 is detected (S119). If it is on, the photometry (A
A series of photographing operations of E), ranging (AF), and exposure (SH) are sequentially performed (S120 to S122). Next, film winding similar to that in step 103 is started (S12).
3) Write magnetic information (such as the date of photographing) on the track T using the magnetic head 5 and the magnetic information writing circuit 12 (S124). Thereafter, perforation is detected in the same manner as in step 105 (S125),
If the specified number of perforations for the frame is detected, the winding is stopped in the same manner as in step 109 (S
127).

Next, a film cartridge C (not shown)
Is compared with the DX code or the maximum number of frames in the magnetic information recorded in advance on the film F (S128). If the current number of frames is equal to or less than the maximum number of frames, the process returns to step 119 and exceeds the maximum number of frames. If so, a rewind process is performed (S129). In step 129,
The film feed motor 2 is driven to rewind the film, and when the rewind is completed, the film feed motor 2
To stop. Completion of this rewind is determined by counting the number of perforations and subtracting the frame count,
Alternatively, it can be determined from the fact that the perforation is not detected for a predetermined time.

Next, the state of the film cartridge presence / absence switch (not shown) is detected by the CPU 8, and when it is determined that the film F is to be taken out (S130), the process returns to step 101. After the film cartridge C is taken out, the film use state display means E is set to the "used" state (or the camera may be provided with a switch means to switch to the used state).

FIGS. 5 and 6 are flowcharts showing another embodiment of the present invention. FIG. 6 shows a process subsequent to FIG. In FIGS. 5 and 6, steps indicating the same processes as those in FIGS. 1 and 4 are denoted by the same reference numerals, and redundant description will be omitted below.

While the above embodiment is directed to a normal wind camera, the present embodiment is directed to a prewind camera. For this, step 108
A step 201 of performing a photographed process is provided in place of step, and a step of performing one frame rewinding process after step 110 is performed.
2 and remove step 118, and
A feature is that a step 204 for performing the rewinding stop processing instead of the step 127 and a step 205 for performing the rewinding processing instead of the step 129 are provided.

The reason why step 202 is provided is that, although the pre-winding method is for photographing from the leading edge of the film, when it is determined that photographing has been completed, it is considered that a frame has been set in the photographing section of the camera. In step 201,
It is determined whether or not the magnetic information has been photographed.

Further, because of the prewind system, the feed after photographing is rewinding, and the rewinding is started in step 203, and the rewinding is stopped in step 204. Further, at step 205, the leading end of the film F exposed from the film cartridge C is rewound for a predetermined time to perform writing.

[0027]

As described above , according to the present invention,
Accidents such as multiple exposure of film being reused
That can provide a camera and control device
is there.

[Brief description of the drawings]

FIG. 1 is a flowchart showing main processing in the present invention.

FIG. 2 is an exploded perspective view showing a schematic configuration of a mechanism of the camera according to the present invention.

FIG. 3 is a block diagram showing an entire circuit of an electric system of the camera according to the present invention.

FIG. 4 is a flowchart showing processing subsequent to FIG. 1;

FIG. 5 is a flowchart illustrating processing for a pre-wind camera.

FIG. 6 is a flowchart showing processing subsequent to FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Feeding photoreflector 2 Film feeding motor 3 Gear mechanism 4 Fork 5 Magnetic head 6 Crimping pad 7 Battery 8 CPU 9 Release switch 10 Feeding circuit 11 Pulse detection circuit 12 Magnetic information writing circuit 13 Magnetic reproduction circuit 14 AE / AF / SH circuit 15 LCD 16 switch 17 LED 18 switch 19 photoreflector 20 detection circuit C film cartridge E film use status display mark F film T track P ₁ perforation P ₂ perforation

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) G03B 17/24 G03B 17/00 G03B 17/02 G03B 7/24

Claims (2)

(57) [Claims] (1) Information on a use state of a film can be stored.
A film having a storage unit is loaded and the film
Use a film cartridge with an index that indicates
For cameras that can be used,
First reading means for reading the use state of the film from the
Reads film usage status information from the film storage
The second reading means for removing the film and the use condition of the film are partially
The first reading means checks that the cart has been exposed.
When reading from the ridge index, the file corresponding to the index
The second reading means reads the information on the use state of the film by the file.
If you cannot read from the film storage section, prohibit shooting
Control means for performing processing.
La. 2. The use condition information of the film can be stored.
A film having a storage unit is loaded and the film
Use a film cartridge with an index that indicates
In a camera control device that can be used, the cartridge
First reading for reading the use state of the film from the index
Means and use condition of the film from the storage unit of the film
Reading means for reading the information of the film, and the state of use of the film
The first reading means confirms that the state has been partially exposed.
When reading from the index of the cartridge,
The information on the use state of the corresponding film is stored in the second reader.
If the step cannot be read from the storage of the film,
Control means for performing a prohibition process of photographing.
Camera control device.