JPH07261247A - Controller for camera - Google Patents

Abstract

PURPOSE:To stop initial film feeding and film information reading actions by a motor-driven operation at the will of a photographer. CONSTITUTION:This controller for a camera is equipped with feeding means 34 and 35 feeding a film driven by motor, a commanding means 38 commanding the stop of the initial feeding of the film in accordance with a manual operation and a control means 39 actuating the feeding means 34 and 35 for taking the initial film feeding action after the loading of a film cartridge 21 is completed and simultaneously stopping the feeding means 34 and 35 for stopping the initial film feeding action when the stop of the initial feeding is commanded before the initial film feeding action is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a camera, which electrically carries out an initial film feeding operation and a film information reading operation.

[0002]

2. Description of the Related Art In a camera which employs a so-called auto loading system, a film feeding motor is automatically rotated upon completion of loading a film cartridge to perform initial film feeding (film loading). In a camera that uses the normal wind method (hereinafter referred to as a normal wind camera), a film that is closest to the leading end of the film is opposed to the aperture by the initial film feeding, and a camera that uses the prewind method (hereinafter referred to as a prewind camera).
Then, the endmost frame of the film is opposed to the aperture. On the other hand, there is known a film cartridge in which a bar code pattern relating to film information such as film ISO sensitivity and the number of shots is formed. A camera using such a cartridge recognizes film information by electrically rotating a barcode pattern when the cartridge is completely loaded and reading the rotating barcode pattern with a photo reflector or the like. The barcode pattern is formed, for example, on a disk integrated with a spool in a cartridge, and the barcode pattern is rotated via the spool by a fork member of a camera engaging with the spool.

[0003]

However, in the conventional camera adopting the above-mentioned auto-loading system, after the initial feeding operation of the film is started once,
The initial feeding operation cannot be stopped at the will of the photographer. Therefore, when the initial feeding operation is started, it is not possible to stop the rotation noise of the feeding motor until the initial feeding operation is completed, and when quietness is required, such as at a concert. If you accidentally load the film cartridge into the camera, it will cause problems. Also, the camera that reads the film information from the barcode pattern similarly,
Once the rotation of the bar code pattern is started, the rotation cannot be stopped by the photographer's intention, so the same problem as described above occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera control device capable of stopping the film initial feeding operation and the film information reading operation by electric operation halfway at the will of the photographer.

[0005]

To explain with reference to FIG. 1 showing an embodiment, a camera control device according to the invention of claim 1 electrically feeds a film,
35, a command means 38 for instructing to stop the initial film feeding in response to a manual operation, and a feeding means 3 for performing the initial film feeding operation after the completion of loading the film cartridge 21.
When the initial feeding stop is commanded before the completion of the initial film feeding operation, the control means 39 for stopping the feeding means 34, 35 to stop the initial film feeding operation is activated. The above problem is solved by this. According to the second aspect of the present invention, the feeding means is controlled so that the frame on the most front side of the film faces the aperture by the initial feeding operation of the film. According to the third aspect of the invention, the feeding means is controlled so that the film at the endmost side of the film faces the aperture by the initial feeding operation of the film. The invention according to claim 4 further comprises a reading means for reading the film information from the recording area of the cartridge, and a display means for displaying the read film information, and the reading means is operated after the completion of loading of the cartridge. When the display means is operated after the film information is read and the film feeding means is operated to perform the film initial feeding operation, and the initial feeding stop is commanded before the completion of the film initial feeding operation, the film initial feeding operation is performed. The feeding means is stopped in order to stop. According to a fifth aspect of the invention, after stopping the film initial feeding operation in response to the initial feeding stop command, the film feeding means is operated to restart the film initial feeding operation in response to a predetermined manual operation. It is the one. The invention of claim 6 further comprises a mode setting means for selectively setting the auto mode and the manual mode as the film initial feeding mode, and when the auto mode is set, the film initial feeding operation is performed in accordance with completion of loading of the cartridge. The feeding means is controlled to start, and when the manual mode is set, when the manual feeding start command is issued after the completion of loading of the cartridge, the feeding means is controlled to start the initial film feeding operation. The invention of claim 7 comprises a rotation driving means 34 for electrically rotating the film information recording medium 22 of the loaded film cartridge 21 and a reading means FR for reading film information from the rotating film information recording medium 22. It is applied to the camera control device. And a command means 38 for commanding a stop of reading the film information in accordance with the manual operation,
Control for activating the rotation driving means 34 and the reading means FR to read the film information after the completion of loading the cartridge, and for stopping the operation of the rotation driving means when a command to stop reading the film information is issued before the completion of reading the film information. And means 39 for solving the above problems. According to the invention of claim 8, after the operation of the rotation driving means is stopped in response to the reading stop command, the feeding means is operated to restart the film information reading operation in response to a predetermined manual operation. It is a thing.

[0006]

[Action]

(1) Invention of Claim 1 After the loading of the cartridge 21 is completed, the initial feeding operation of the film is performed electrically by the feeding means 34 and 35. If an instruction to stop the initial feeding is made by a manual operation before the completion of the initial feeding, the initial feeding operation by the feeding means 34 and 35 is stopped. (2) Invention of Claim 7 After the completion of loading of the cartridge 21, the film information recording medium is electrically rotationally driven by the rotation driving unit 34, and the film information is read from the rotating film information recording medium 22 by the reading unit FR. If the reading stop is manually instructed before the completion of the film information reading operation, the operation of the rotation driving means 34 is stopped.

Incidentally, in the section of means and action for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for making the present invention easy to understand. It is not limited to.

[0008]

【Example】

-First Embodiment- An embodiment in which the present invention is applied to a normal wind camera will be described with reference to FIGS. The normal wind camera is a type of camera in which exposure is sequentially performed from the frame on the most front side to the end side of the film.

FIG. 1 shows the configuration of a camera control device and a film cartridge in this embodiment.
A film cartridge 21 is loaded in a cartridge chamber (not shown) of the camera, and a film 25 is wound around a spool rotatably housed inside the film cartridge. A bar code disk 22 that rotates integrally with the spool is provided on the upper surface of the cartridge 21, and the bar code disk 22 has a bar code pattern corresponding to the film ISO sensitivity.

Reference numeral 34 is a feeding / rewinding motor that rotationally drives the spool of the cartridge 21, and 35 is a winding motor that rotationally drives the film take-up spool 30.
The rewinding motor 34 rotates a fork member (not shown) of the camera. The fork member is engaged with the spool of the loaded cartridge 21, so that the rotation of the fork member causes the spool of the cartridge 21 to rotate. When the spool rotates in the film feeding direction (counterclockwise direction in the drawing), the film 25 is fed from the cartridge 21, and the fed film 25 passes through the aperture and is wound up on the film take-up spool 30. On the other hand, when the spool of the cartridge 21 rotates in the film rewinding direction (clockwise direction in the drawing), the film 2
5 is rewound into the cartridge 21. At the time of feeding and rewinding the film, the cartridge 21
The barcode disc 22 also rotates integrally with the spool.

FR is a bar code detecting photo reflector having a light emitting section 23 and a light receiving section 24. In this photo reflector FR, the light emitted from the light emitting section 23 is reflected by a bar code pattern and is received by the light receiving section 24. It is placed in the camera as described above. The light receiving section 24 photoelectrically converts the received light and outputs the photoelectrically converted output to the CP via the I / F 44.
Input in U39. If the white pattern of the barcode is located at the emission position from the light emitting unit 23, the amount of light received by the light receiving unit 24, that is, the output of the light receiving unit 24 becomes a predetermined value or more,
If the black pattern is located, it will be less than the predetermined value. Therefore, if the output of the light receiving unit 24 is input for a predetermined time when the disk 22 rotates, the barcode pattern can be decoded from the output waveform.

FI is a photointerrupter for detecting perforations, which comprises a light projecting section 28 and a light receiving section 29, and detects the perforations 26 formed in the film. The photoelectric conversion output of the light receiving unit 29 is input to the CPU 39 via the I / F 40. Perforation 26
Is provided corresponding to each frame of the film 25, it is possible to judge whether or not each frame of the film faces the aperture based on the output of the photo interrupter FI.

Reference numeral 31 is a roller that rotates with the film feeding, 32 is a disk that rotates integrally with the roller 31, and 33 is a photo interrupter that detects holes formed in the disk 32 at predetermined angular intervals. , Photo interrupter 33
Is output to the CPU 39 via the I / F 43.
Disk 3 if film 25 is not in contact with roller 31
2 does not rotate, and the output waveform of the photo interrupter 33 does not change. Therefore, when the spool of the cartridge 21 rotates in the rewinding direction, the output waveform of the photo interrupter 33 does not change for a predetermined time.
It can be determined that the cartridge has been completely rewound in the cartridge 21.

The CPU 39 has a motor driver 42 for driving the above-mentioned feeding / rewinding motor 34 and hoisting motor 35, and a liquid crystal display device 36 provided on the surface of the camera.
LCD driver 41 for driving and displaying, slide type mode switch 37, and press release switch 3
8 and a pressing type film rewinding switch 51 are connected. The mode switch 37 is manually operated in an auto mode in which film loading is automatically started immediately after reading a bar code, and in a manual mode in which the loading is started after the release switch 38 is turned on after the bar code is read. It is a switch for selecting.

Next, the procedure of control by the CPU 39 will be described based on the flowcharts of FIGS. This routine shows the procedure from the loading of the cartridge to the completion of the initial feeding of the film. When it is determined in step S301 in FIG. 2 that the cartridge has been loaded, step S3
Go to 02. Here, in this embodiment, the cartridge 21 is inserted into the cartridge chamber and then the lid of the cartridge chamber is closed to determine that the loading of the cartridge is completed. Whether or not the cartridge is inserted into the cartridge chamber may be detected by a cartridge insertion detection switch (not shown), and the opening / closing of the cartridge lid may be detected by a lid opening / closing detection switch (not shown).

Next, in step S302, the shift to the interrupt process 1 of FIG. 4 accompanying the operation of the release button 38 is permitted. The transition to the interrupt processing 1 is made in step S31.
Up to 5 interrupts are disabled. That is, when the release button 38 is operated while the processes of steps S303 to S314 are being performed, the interrupt process 1 is executed.
Details of the interrupt processing 1 will be described later.

In step S303, a variable a indicating the number of times the barcode is read is reset to "0". In step S304, the bar code detecting photo reflector FR is operated via the I / F 44, and in step S305, the sending / rewinding motor 3 is operated via the motor driver 42.
Start the reversal of 4. The reverse rotation of the motor 34 causes the spool in the cartridge 21 to rotate in the film rewinding direction via a fork (not shown) of the camera, and the barcode disc 22 also rotates accordingly.

In step S306, the bar code pattern is read and decoded. That is, the output of the light receiving portion 24 of the bar code detecting photo reflector FR is input through the I / F 44 for a predetermined time, and the bar code pattern is decoded based on the input signal waveform. As a result, the ISO sensitivity of the film 25 is recognized in the CPU 39. In step S307, the decoded ISO sensitivity is stored in a memory (not shown), and in step S308, the barcode reading count a is incremented by "1", and then step S30 is performed.
In 9, the ISO sensitivity is displayed on the liquid crystal display device 36 via the liquid crystal driver 41.

In step S310, it is determined whether or not a = 5, that is, whether or not the reading and decoding of the bar code pattern has already been performed five times, and if negative, the process returns to S306.
If affirmative, in step S311, the sending / rewinding motor 3
The reverse rotation of No. 4 is stopped, and the operation of the barcode detecting photo reflector FR is stopped in step S312.
That is, in the present embodiment, reading the barcode pattern,
The decryption is performed 5 times, and the 5 ISO sensitivities thus obtained are stored in the memory. Originally, these five ISO sensitivities should all be the same, but they are not always the same due to a reading error or the like.

In step S313, a majority vote is selected from the five ISO sensitivities stored in the memory, and this is set as the ISO sensitivity for exposure calculation. Note that I
The method of setting the SO sensitivity is not limited to this. For example, if the same ISO sensitivity is obtained three times in a row, the sensitivity may be set as the sensitivity for exposure calculation. Step S3
In 14, the ISO sensitivity set in step S313 is displayed on the liquid crystal display device 36. In step S315, the transition to interrupt processing 1 is prohibited.

According to the procedure so far, the cartridge 2
Upon completion of loading No. 1, the spool of the cartridge 21 and the bar code disk 22 are integrally rotated in the rewinding direction, and the bar code pattern is read and decoded five times accordingly. Then, the ISO sensitivity for exposure calculation is set from the obtained five ISO sensitivities. If the release button 38 is operated while this control is being performed, the interrupt processing 1 of FIG. 4 is interrupt-activated as described above.

The interrupt processing 1 of FIG. 4 will be described. In step S501, energization of the bar code detecting photo reflector FR is stopped, and in step S502, the sending / rewinding motor 34 is supplied via the motor driver 42.
Stop rotating. Whether or not a = 0 in step S503,
That is, it is determined whether or not the barcode has not been read even once, and if the result is affirmative, the process proceeds to step S509. In step S509, the liquid crystal display device 16 warns that the ISO sensitivity cannot be obtained.

On the other hand, if it is judged at the step S503 that a = 0 is not satisfied, that is, if the bar code is read at least once, the routine proceeds to step S504, where it is possible to set the ISO sensitivity for exposure calculation. To determine. For example, if the number of times of reading is two and the ISO sensitivities obtained at the first and second times are different, it is determined that the ISO sensitivity for exposure calculation cannot be set, and the above step S50 is performed.
Proceed to 9. When at least two identical sensitivities are obtained, it is determined that the ISO sensitivity for exposure calculation can be set, and the process proceeds to step S505. In step S505,
The ISO sensitivity for exposure calculation is set from the read ISO sensitivity. In step S506, the set ISO sensitivity for exposure calculation is displayed on the liquid crystal display device 36.

When the processes of steps S506 and S509 are completed, the loop of steps S507 and S508 is repeated.
When the release switch 38 is turned on while rotating this loop, steps S507 to S2 of FIG.
Proceeding to 304, the reading of the barcode pattern is restarted. Further, if the cartridge 21 is taken out while the above-mentioned loop is being rotated, step S508 is affirmed and the process ends. The determination as to whether the cartridge 21 has been taken out may be made by the state of the cartridge insertion detection switch or by the cartridge lid opening / closing detection switch.

As described above, in the present embodiment, when the release switch 38 is operated while the barcode pattern reading operation is being performed, the sending / rewinding motor 34 is once stopped and the reading operation is stopped. It Therefore, even if the film cartridge 21 is accidentally loaded into the camera when quietness is required at a concert, for example, the rotation sound of the sending / rewinding motor 34 is immediately stopped by operating the release switch 38. be able to. After the bar code pattern reading operation is stopped in this way, it is determined whether the ISO sensitivity for exposure calculation can be set based on the number of times of reading up to the present. If it is determined that the setting is possible, the ISO sensitivity for exposure calculation is set, the set sensitivity is displayed, and if it is determined that the setting is not possible, an error is displayed.

After that, when the release switch 38 is operated again, the barcode pattern reading operation is restarted. On the other hand, when the photographer looks at the ISO sensitivity for exposure control displayed on the liquid crystal display device 36 and determines that the sensitivity is different from the intended sensitivity, the release switch 38 need not be operated. In this case, the barcode pattern reading operation is not restarted, and the cartridge can be immediately taken out and replaced with another one.

Referring back to FIG. 2, step S31 will be described.
At 6, it is determined which of the above-mentioned auto mode and manual mode is set. If the manual mode is set, the loop of steps S317 and S138 is repeated. If the cartridge 21 is taken out of the camera while rotating around this loop, step S31
When 8 is affirmed, the processing ends.

If the release switch 38 is operated during the loop of steps S317 and S138, the process proceeds from step S317 to step S401 in FIG. In step S401, the shift to the interrupt process 2 of FIG. 5 associated with the operation of the release button 38 is permitted. The shift to the interrupt processing 2 is permitted until the interrupt is prohibited in step S407. That is, steps S402 to S40
If the release button 38 is operated while the process of 6 is being performed, the interrupt process 2 is executed. The details of the interrupt processing 2 will be described later.

Next, in order to start the initial feeding operation of the film, the driving of the perforation detecting photo interrupter FI is started via the I / F 40 in step S402, and the motor driver 4 is started in step S403.
The forward rotation of the feeding / rewinding motor 34 is started via 2.
The forward rotation of the feeding / rewinding motor 34 causes the spool in the cartridge 21 to rotate in the film feeding direction via a fork (not shown) of the camera, and the film 25 is fed from the cartridge 21. The delivered film 25 passes through the aperture 27 and is guided to the take-up spool 30,
The film 25 is wound on the take-up spool 30 that rotates in the winding direction by the normal rotation of the winding motor 35.

In step S404, the film 2 is output from the output of the photointerrupter FI for perforation detection.
It is determined whether or not the piece 5 on the most distal side faces the aperture. If step S404 is denied, step S4
If the answer is YES, the process proceeds to step S405. In step S405, the feeding / rewinding motor 34 and the hoisting motor 35 are stopped, and at the same time, step S406.
Then, the photo interrupter FI for perforation detection is stopped. At this point, the initial film feeding operation is completed. In step S407, the transition to the interrupt processing 2 is prohibited, and then the processing ends. On the other hand, step S3
When it is determined in 16 that the auto mode is set, steps S317 and S318 are skipped and the process directly proceeds to step S401.

As described above, in the present embodiment, when the manual mode is set, after the reading and decoding of the bar code pattern is completed and the ISO speed for exposure calculation is set and displayed, the initial film feeding is performed. It is up to the photographer to decide whether or not to perform the sending operation. When the photographer operates the release switch 38 after determining that the initial feeding should be performed, the initial feeding of the film is performed. If the photographer does not operate the release switch 38 by observing the ISO sensitivity for exposure calculation displayed on the liquid crystal display device 36 and not determining that the initial feeding should be performed, the film initial feeding is not performed. The cartridge 21 can be taken out on the spot. Further, when the auto mode is set, the initial film feeding is automatically started after the reading and decoding of the bar code pattern is completed and the ISO sensitivity for exposure calculation is set and displayed.

When the release button 38 is operated during the control of steps S402 to S406 of FIG. 3, that is, during the film initial feeding operation, the interrupt processing 2 of FIG. 5 is activated by interruption.

FIG. 5 shows the details of the interrupt processing 2. In step S601, the photo interrupter FI for perforation detection is stopped, and in step S602, the feeding / rewinding motor 34 and the winding motor 35 are stopped to initially feed the film. Stop the feeding operation. Step S60
In 3, the liquid crystal display device 36 displays via the liquid crystal driver 41 that the initial feeding operation has stopped halfway.

After that, the loop of steps S604 and S605 is repeated. When the release switch 38 is turned on while rotating in this loop, the process returns to step S402 in FIG. 3 to restart the film initial feeding operation. On the other hand, if the film rewind switch 51 is turned on while the loop of steps S604 and S605 is being rotated, step S6
The routine proceeds from 05 to step S606, and it is determined whether the time point at which the interrupt processing 2 is entered is before or after step S403, that is, before or after the driving of the feed / rewind motor 35. After driving, the process proceeds to step S607 to rewind the film delivered from the cartridge 21 into the cartridge 21, and the reverse rotation of the delivery / rewinding motor 34 is started. The reverse rotation of the motor 34 causes the spool of the cartridge 21 to rotate in the rewinding direction via a fork (not shown) to rewind the film. Step S6
At 08, the process waits until the rewinding is completed, and when it is completed, the process is ended. Whether or not the rewinding is completed may be determined from the output of the photo interrupter 33 described above.

In step S606, the feeding / rewinding motor 3
If it is determined that the recording medium has not been driven in step 4, that is, if the film has not been sent out from the cartridge 21, there is no need to rewind, and the processing is terminated without performing steps S607 and S608.

As described above, in this embodiment, when the release switch 38 is operated after the initial feeding operation of the film is started, the feeding / rewinding motor 34 and the winding motor 35 are once stopped, and the initial feeding is performed. The operation is stopped. Since this initial feeding operation is performed using the two motors 34 and 35, the motor rotation sound generated is larger than that of the barcode reading operation performed using only the motor 34. Therefore, from the viewpoint of noise, the operation of reading the bar code pattern is not a problem, but the initial film feeding operation may be unsatisfactory. However, in this embodiment, the film initial feeding operation can be stopped midway by operating the release button 38, so that the motor 3 can be used when necessary.
The rotation noises of 4,35 can be stopped immediately. After that, when the release switch 38 is operated again, the film initial feeding operation is restarted.

Further, particularly when the auto mode is set, the initial film feeding is started immediately after the reading and decoding of the bar code pattern and the display of the exposure control ISO speed. Therefore, when the photographer looks at the ISO sensitivity for exposure control displayed on the liquid crystal display device 36 and determines whether or not the sensitivity is as intended, the initial feeding operation has already been started. If the photographer determines that the displayed sensitivity is not the intended value, the release button 38 can be operated to immediately stop the film initial feeding operation, and then the film rewind switch 51 is turned on. When manipulated, the film is rewound and the cartridge can be immediately removed and replaced with another.

Furthermore, in the present embodiment, the ISO sensitivity is displayed on the liquid crystal display device 36 every time the bar code pattern is read and decoded, so that if the reading error occurs frequently, the display on the liquid crystal display device 36 will occur. The content will change frequently. When the photographer sees such a change in display and determines that the film cartridge or the camera has some trouble, the operation of the release switch 38 can stop the barcode pattern reading operation on the spot. .

In the configuration of the above embodiment, the sending / rewinding motor 34 and the hoisting motor 35 read the feeding means, the release switch 38 the commanding means, the CPU 39 the control means and the mode setting means, and the photoreflector FR. The liquid crystal display device 36 transmits / receives the display means.
The rewinding motors 34 respectively constitute rotation driving means.

In the above description, the barcode pattern is read by rotating the spool of the cartridge 21 in the rewinding direction before the initial feeding of the film. The bar code pattern is not read during the initial feeding of the film because the film 25 fed from the cartridge 21 receives resistance at the gate and rails of the camera when the film is fed, so that the barcode disc 22 is at a constant speed. This is because there is a possibility that the ISO sensitivity may be set incorrectly because the rotation cannot be performed with. However, if the barcode disc 22 is guaranteed to rotate at a constant speed, the barcode pattern may be read during the initial feeding. Further, in the above description, the ISO sensitivity is displayed on the liquid crystal display device 36 each time the barcode pattern is decoded, but the ISO sensitivity for exposure control is displayed only after the ISO sensitivity is set. May be. This eliminates the possibility that the photographer will mistakenly recognize the ISO sensitivity.

Second Embodiment A second embodiment in which the present invention is applied to a prewind camera will be described with reference to FIGS. 6 and 7. A prewind camera is a type of camera in which a film is once wound up to the end after a cartridge is loaded, and then the film is rewound one frame at a time for each shooting.

In step S701 of FIG. 6, the cartridge 2
When it is determined that the loading of No. 1 is completed, the process proceeds to step S702,
The shift to the interrupt process 3 of FIG. 7 associated with the operation of the release button 38 is permitted. The shift to the interrupt processing 3 is permitted until the interrupt is prohibited in step S717. That is,
If the release button 38 is operated while the processes of steps S703 to S716 are being performed, the interrupt process 3 is executed. Details of the interrupt processing 3 will be described later.

In step S703, the variable a indicating the number of times the barcode is read is reset to "0". In step S704, the photointerrupter detecting photointerrupter FI is activated, and in step S705, the barcode detecting photoreflector FR is activated. In step S706, the forward rotation of the feeding / rewinding motor 34 and the winding motor 35 is started in order to perform the initial feeding of the film, that is, in order to make the endmost frame of the film 25 face the aperture. By the normal rotation of the motor 34, the spool in the cartridge 21 rotates in the film feeding direction via a fork (not shown) of the camera, and the film 25 is fed from the cartridge 21. Film 25 sent out
Is guided to the take-up spool 30 through the aperture 27, and the film 25 is wound on the take-up spool 30 which rotates in the winding direction by the forward rotation of the take-up motor 35. After the film 25 is wound on the take-up spool 30, the rotation of the feeding / rewinding motor 34 is stopped, and thereafter, the film 25 is wound by the driving force of only the winding motor 35.

In step S707, the barcode pattern is read and decoded in the same manner as described above. In step S708, the decoded ISO sensitivity is stored in a memory (not shown), and in step S709, the barcode reading count a is incremented by "1". Step S7
In 10, it is determined whether or not a = 5, that is, whether or not the reading and decoding of the bar code pattern has already been performed 5 times. If negative, the process returns to S707, and if affirmative, step S7.
From the five ISO sensitivities stored in the memory in step 11, for example, a majority is selected by majority, and this is selected as the ISO for exposure calculation.
Set as sensitivity. In step S712, step S
The ISO sensitivity set in 711 is displayed on the liquid crystal display device 36.

Next, in step S713, the film 25
It is determined whether or not the piece at the endmost end of is facing the aperture. This determination can be made by counting the number of times perforation is detected by the photointerrupter FI for perforation detection during the initial feeding. If step S713 is denied, the process returns to step S707, and if affirmed, the process proceeds to step S714. Step S
At 714, the hoisting motor 35 is stopped, and step S71
In 5, the bar code detecting photo reflector FR is stopped, and in step S716, the perforation detecting photo interrupter FI is stopped. At this point, the initial film feeding operation is completed. In step S717, the transition to the interrupt process 3 is prohibited, and then the process ends.

As described above, in this embodiment, the initial feeding operation of the film 25 is started when the loading of the cartridge 21 is completed, and the bar code pattern is read and decoded in synchronization with the initial feeding operation. . And got 5
The ISO sensitivity for exposure calculation is set from one ISO sensitivity. If the release button 38 is operated while the initial feeding operation and the barcode reading / decoding operation are being performed, the interrupt processing 3 shown in FIG. 7 is activated.

FIG. 7 shows the details of the interrupt processing 3. In step S801, the perforation detecting photo interrupter FI is stopped, and in step S802, the feeding / rewinding motor 34 and the winding motor 35 are stopped to initially feed the film. Stop the feeding operation. Step S80
In 3, the bar code detecting photo reflector FR is stopped, and in step S804, the liquid crystal display device 36 displays, via the liquid crystal driver 41, a message indicating that the initial feeding operation is stopped.

After that, the loop of steps S805 and S806 is repeated. When the release switch 38 is turned on while rotating in this loop, the process returns to step S704 in FIG. 6 to restart the film initial feeding operation. On the other hand, if the film rewind switch 51 is turned on while the loop of steps S805 and S806 is being rotated, step S8
In step S807, the reverse rotation of the feeding / rewinding motor 34 is started to rewind the film 25 into the cartridge 21. The reverse rotation of the motor 34 causes the spool of the cartridge 21 to rotate in the rewinding direction via a fork (not shown) to rewind the film. In step S808, the process waits until the rewinding is completed, and when the rewinding is completed, the process proceeds to step S717 in FIG.

As described above, in this embodiment, in the prewind camera, when the release switch 38 is operated after the initial film feeding operation and the reading / decoding operation of the bar code pattern are started, each of these operations is performed. Is once stopped and then the release switch 38 is operated again, each operation is restarted. Therefore, the same effect as the above can be obtained. In particular, in the prewind camera as in the present embodiment, the time required for the initial film feeding operation is longer than that in the normal wind camera, so that the effect of stopping this initial feeding operation is great.

In the above description, when the reading / decoding operation of the bar code pattern is once stopped and then restarted, the ISO sensitivity for exposure calculation is set by using the data read before the stop. , The data read before the stop is not used, the reading and decoding operations are performed again 5 times after the restart, and the I for the exposure calculation is based on the result.
The SO sensitivity may be set. Further, the film information is not limited to the ISO speed, and may be, for example, the number of frames to be photographed or other film information. Further, although an example in which a cartridge of a type in which the spool of the cartridge is rotated to feed the film is used is shown, the initial feeding of the film is performed by rotating only the take-up spool of the camera like a normal 135 type cartridge. It may be a cartridge. The switch operated to stop or restart the barcode pattern reading / decoding operation or the film initial feeding operation is not limited to the release switch 38, and may be, for example, a self-timer mode setting switch or a flash photography mode. It can also be used with various existing switches such as a selection switch. Alternatively, a dedicated switch may be provided without using the existing switch.

[0051]

According to the invention of claim 1, since the initial feeding operation can be stopped by a manual operation after the electric film initial feeding operation is started, for example, quietness at a concert is required. Even if the initial feeding operation is mistakenly started at the time of the occurrence, it is possible to immediately stop the generation of noise (for example, the rotation noise of the feeding motor) generated by the feeding operation. In particular, in the prewind camera, the time required for the initial film feeding operation is longer than that in the normal wind camera, so that the initial feeding operation can be stopped midway. If the film information read from the cartridge is displayed before or immediately after the start of the initial feeding, the film initial feeding operation can be immediately stopped when the displayed sensitivity is not the intended value. The cartridge can be replaced quickly.
If the film initial feeding operation is restarted in response to the manual operation after the film initial feeding operation is stopped, the initial feeding operation is immediately restarted when the quietness is separated from the required location. be able to. According to the invention of claim 7, in the camera for reading the film information by electrically driving the film information recording medium of the cartridge to read the film information, after the film information reading operation is started, the reading operation can be stopped by a manual operation. Therefore, it is possible to immediately stop the generation of noise (such as the rotation sound of the motor) during the reading operation as described above.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an operation control device for a camera according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of the first embodiment.

FIG. 3 is a flowchart following FIG. 2;

FIG. 4 is a flowchart showing details of interrupt processing 1.

FIG. 5 is a flowchart showing details of interrupt processing 2.

FIG. 6 is a flowchart illustrating the operation of the second embodiment.

FIG. 7 is a flowchart showing details of interrupt processing 3.

[Explanation of symbols]

 21 film cartridge 25 film 30 film take-up spool 34 feed / rewind motor 35 take-up motor 36 liquid crystal display 37 mode setting switch 38 release switch 39 CPU FI perforation detection photo interrupter FR bar code detection photo reflector

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuyuki Kazami 3 2-3 Marunouchi, Chiyoda-ku, Tokyo Inside Nikon Corporation

Claims (8)

[Claims] 1. A feeding means for feeding a film electrically, an instruction means for instructing to stop the initial feeding of the film in accordance with a manual operation, and an initial feeding operation for the film after the loading of the film cartridge is completed. While activating the feeding means,
When the initial feeding stop is instructed before the completion of the film initial feeding operation, a control means for stopping the feeding means to stop the film initial feeding operation is provided. Control device. 2. The camera according to claim 1, wherein the control means controls the feeding means so that the frame on the most front side of the film faces the aperture by the initial feeding operation of the film. Control device. 3. The camera according to claim 1, wherein the control means controls the feeding means so that the film at the endmost side of the film faces the aperture by the film initial feeding operation. Control device. 4. A reading means for reading film information from a recording area of the cartridge, and a display means for displaying the read film information, wherein the control means controls the reading means after the loading of the cartridge is completed. Activating the display means after reading the film information by the reading means and activating the feeding means for performing the film initial feeding operation, and the initial feeding operation before the completion of the film initial feeding operation. 4. The camera control device according to claim 1, wherein when the stop is instructed, the feeding means is stopped so as to stop the film initial feeding operation. 5. The control means stops the film initial feeding operation in response to the initial feeding stop command, and then restarts the film initial feeding operation in response to a predetermined manual operation. 5. The camera control device according to claim 1, wherein the feeding means is activated. 6. The film initial feeding mode, further comprising a mode setting means for selectively setting an auto mode and a manual mode, wherein the control means sets the auto mode when the loading of the cartridge is completed. The film feeding means is controlled to start the film initial feeding operation, and when the manual feeding start command is issued after the completion of loading of the cartridge in the manual mode setting, the film feeding operation is started to start the film initial feeding operation. The control device for a camera according to claim 1, wherein the control means controls the means. 7. A control device for a camera, comprising: a rotation driving means for electrically rotating and driving a film information recording medium of a loaded film cartridge; and a reading means for reading film information from the rotating film information recording medium. Commanding means for instructing to stop reading the film information in response to a manual operation, and actuating the rotation driving means and the reading means to read the film information after the loading of the cartridge is completed, and before completing the reading of the film information. And a control unit for stopping the operation of the rotation driving unit when a command to stop the reading of the film information is issued to the control unit of the camera. 8. The feeding means for stopping the operation of the rotation driving means in response to the reading stop command and then restarting the reading operation of the film information in response to a predetermined manual operation. 8. The control device for the camera according to claim 7, wherein the control device operates.