JP2964719B2 - Camera that can use film taken out halfway - 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 which can use a partially taken out film, and more particularly to a camera which can be used with a partially taken out film photographed by a prewind camera.

[0002]

2. Description of the Related Art A normal wind camera is a camera in which a film is wound up by a predetermined amount (for example, four frames) after a film cartridge is loaded, and thereafter, the film is wound up one frame at a time for each photographing. On the other hand, after loading the cartridge, the film is wound up to the end,
A camera that rewinds one frame at a time for each shot is called a prewind camera. By the way, a film taken halfway may be rewound once, taken out of the camera, and then loaded again into the camera for use. In order to prevent double exposure in such a case, US Pat.
In the publication, photographed information is magnetically recorded for a photographed frame, for example, in a magnetic recording area of a film, and when the film is reloaded, the presence or absence of the photographed information is detected, and the photographed information is recorded. There is disclosed a camera for taking a picture without a frame (unexposed frame) facing an aperture.

[0003]

However, the camera disclosed in the above-mentioned publication is a pre-wind camera, and it is premised that a pre-wound film previously photographed by the pre-wind camera is used. And there is no problem when the pre-wound film taken by such a pre-wind camera is loaded into the pre-wind camera having the above-described function, but when this is loaded into the normal wind camera, It is not possible to cope, and there is a possibility that double exposure will occur.

An object of the present invention is to provide a camera capable of using a partially taken out film which prevents double exposure when a partially taken out film taken by a prewind camera is loaded.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to FIGS. 1 and 2 showing an embodiment of the present invention. The present invention is applied to a loadable camera. Then, the feeding means 28, 29, 30, and 31 for feeding the film 1 and the film use state identification display means 60 (FIG. 3) provided on the cartridge 5 are driven to identify the use state of the film. The film drive means 28 and 29 and the film use state identification and display means 60 are distinguished to determine whether the loaded film is an unloaded film or not. At the time of winding, the photographed information detecting means 18 and 23 for detecting whether or not the photographed information is recorded, and the film 1 loaded with the film detecting means 27 detect that the film 1 is a partially removed film, and When the information detecting means 18 and 23 detect that the photographed information is not recorded for the frame at the leading end of the film, the photographing is prohibited. Feeding means 2
8 and 29, the film is rewound and the display driving means 28,
29 is provided with a control means 21 for controlling the drive of the film use state identifying and displaying means 60 to identify and display that it is a used film, thereby solving the above problem. In the invention of claim 2, the film detecting means 27 detects that the loaded film 1 is a film taken out halfway, and the photographed information detecting means 18, 2
When it is detected that the photographed information is recorded for the frame on the leading end side of the film, winding 3 and detection of the photographed information are continued, and after detecting the frame where the photographed information is not recorded, When a frame in which the photographed information is recorded is detected, photographing is prohibited and the feeding means 28, 29
And the display driving means 28 and 29 drive-control the film use state identification display means to identify the used film.

[0006]

When it is detected that the loaded film 1 is a film taken out halfway and that no photographed information is recorded for the frame at the foremost end of the film, the control means 21 determines It is determined that the film was previously shot by the prewind camera, the shooting is prohibited, and the film is rewound by the feeding means 28 and 29. Then, the display driving means 28 and 29 drive-control the film use state identification display means 60 to identify the used film. In particular, according to the invention of claim 2, when it is detected that the loaded film 1 is a halfway taken-out film and that it is detected that the photographed information is recorded on the most distal end frame of the film, , The detection of the wound-up and photographed information is continued.
Then, if a frame on which the photographed information is recorded is detected after a frame on which the photographed information is not recorded is detected, then the film used in both the prewind camera and the normal wind camera is used. Is determined, and the photographing is prohibited in the same manner as described above, and the feeding means 28, 29
Rewinds the film, and drives and controls the film use state identification and display means 60 by the display driving means 28 and 29.
The used film is identified and displayed.

In the means and means for solving the above problems which explain the constitution of the present invention, the drawings of the embodiments are used to make the present invention easy to understand. However, the present invention is not limited to this.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 2 shows a film used in this example. .., N-1, n from the leading end of the film 1 as shown in the figure. In the upper part of the film 1, two perforations 3a and 3b are perforated for each photographing frame. As can be seen from the figure, the perforations 3a are arranged on the leading end side of the film with respect to each photographic frame, and the perforations 3b are arranged on the trailing end side (cartridge side) with respect to each photographic frame. Further, one perforation 3b 'is arranged on the leading end side of the film from the perforation 3a of the frame of the frame number "1", and the perforation 3a' is closer to the cartridge than the perforation 3b of the frame of the frame number "n" (the last frame). However, a perforation 3c for indicating the termination is further provided on the cartridge side.
Is arranged.

A lower part of the film 1 is provided with a magnetic recording area 2 coated with a magnetic recording medium as disclosed in, for example, JP-A-2-136840.
In the magnetic recording area 2, information on photographing is recorded by a magnetic head 18 described later.

Reference numeral 5 denotes a film cartridge for accommodating the above-mentioned film 1. The cartridge 5 of the present embodiment includes the one disclosed in Japanese Patent Application No. 2-189994 by the present applicant. Similarly, a film state identification display device 60 as shown in FIG. 3 is provided. This identification display device 60 divides the periphery of the upper end surface of the cartridge 5 into four parts, and provides a number indicating the use state of the film 1 provided in the three areas, and an index 6 indicating one of the numbers according to the use state.
1 (provided on the spool shaft of the cartridge). When the index 61 indicates the number "1", it indicates that the film 1 in the cartridge 5 is a completely unused film, and when the index 61 indicates the number "2", the film 1 is partially taken and taken out. Indicates that the film has been taken out halfway, and indicates a used film from which all frames have been photographed when indicating the number "3". The cartridge 5 is described in US Pat.
The index 61 may be provided on a member different from the spool shaft as disclosed in Japanese Patent No. 65600.

FIGS. 4A and 4B show three examples of a film taken out halfway, wherein FIG. 4A shows a film taken out halfway through a prewind camera, and FIG. 4B shows a film taken out halfway through a normal wind camera. , (C) respectively show the halfway-taken films photographed by both the prewind camera and the normal wind camera. In the figure, the shaded pieces indicate the pieces that have been photographed, and FIG.
In the film of FIG. 4A, two frames have been photographed from the end, and in the film of FIG.
In the film of FIG. 4C, two frames at the front end and two frames at the end have already been photographed.

FIG. 5 is a rear view of the normal wind camera according to the present embodiment, and shows a state in which a rear surface is removed. At one end of the camera body, a cartridge chamber 11 for loading the cartridge 5 is provided, and at the other end, a spool chamber 13 for accommodating a film take-up spool 12 is provided. Is provided. Also aperture 1
4 above and below are inner rails 1 forming a film passage path.
5 and an outer rail 16 are provided respectively.

The film take-up spool 12 is connected to a film feed motor 30 (FIG. 1) via a reduction gear mechanism (not shown), and is rotatable by rotation of the motor 30. When the film feed motor 30 is rotated forward after the film 1 has been sent from the cartridge 5 to the film take-up spool 12, the film 1 is pressed by a film roller (not shown).
2 and wound up by the film take-up spool 12.

A photoelectric element 17 such as a photoreflector for detecting the perforation of the film 1 is disposed above the aperture 14, and a magnetic recording area 2 provided on the film 1 is disposed below the photoelectric element 17. A magnetic head 18 for recording various information related to photographing and a pressure pad 19 are provided. The film 1 is sandwiched between the magnetic head 18 and the pressure pad 19 in a pressure-contact state, and the magnetic force is applied when the film 1 runs. Recording and reproduction can be performed appropriately. Here, when an arbitrary frame of the film is opposed to the aperture 14, the photoelectric element 1
Numeral 7 is located at a position where the perforation 3a (FIG. 2) of the piece is detected, and the magnetic head 18 is located almost directly below.

FIG. 1 is a block diagram of a control system of the camera. Reference numeral 21 denotes a control circuit, which controls the operation of the camera 10 according to a processing procedure described later. Reference numeral 22 denotes a recording circuit, which records information relating to photography in the magnetic recording area 2 of the film 1 via the connected magnetic head 18. Here, the information on the photographing is, for example, information such as a photographing date and an exposure value at the time of photographing, and in the present embodiment, these information correspond to photographed information. A reproducing circuit 23 reproduces information recorded in the magnetic recording area 2 via the magnetic head 18. Reference numeral 24 denotes a photoelectric conversion circuit, which detects presence / absence and perforation of the film 1 by the connected photoelectric element 17. Reference numeral 25 denotes a film end detecting circuit which inputs the output of the photoelectric conversion circuit 24 and, when two perforations cannot be detected within a predetermined time, judges that the film is at the end and outputs a signal to that effect to the control circuit 21.

An exposure controller 26 controls a shutter mechanism and an aperture mechanism (not shown) to perform photographing. 27
Is a use state detecting device for detecting the film use state indicated by the identification display device 60 (FIG. 3) of the loaded cartridge 5. That is, this device 27 detects the rotational position of the cartridge spool shaft by means of a photoelectric element (not shown), for example, as disclosed in the above-mentioned Japanese Patent Application No. 2-189994. Input to the control circuit 21. The control circuit 21 determines which number the index 61 of the spool shaft indicates based on the input rotation position signal, and thereby recognizes the use state of the film.

Reference numeral 28 denotes a cartridge drive motor, which is driven and controlled by a motor drive circuit 29. Here, the cartridge 5 of the present embodiment is to send out the film 1 from the cartridge by rotating its spool shaft (where the film is wound). That is, when the cartridge drive motor 28 is rotated forward, the spool shaft of the cartridge 5 is rotated, and the film is delivered. When the motor 28 rotates in the reverse direction, the spool shaft rotates in the direction opposite to the above, and the film 1 is rewound into the cartridge 5.
After rewinding, the cartridge 5 is rotated by the reverse rotation of the motor.
Can be driven.

Reference numeral 30 denotes a film feed motor which is driven and controlled by a motor control circuit 31. When the film feed motor 30 rotates forward, the take-up spool 12 rotates, and the film 1 is wound on the take-up spool 12. Can be
Reference numeral 50 denotes a warning device, which displays a warning by lighting or blinking a warning LED (not shown) in response to a warning signal from the control circuit 21.

The switch SW1 is a lid switch and is turned on when a cartridge lid (not shown) is opened. The switch SW2 is a cartridge switch, and is turned on when the cartridge 5 is loaded in the cartridge chamber 11. The switch SW3 is a release switch, and is turned on by pressing a release button (not shown). The switch SW4 is a halfway take-out switch, and is turned on in conjunction with the depression of a halfway take-out command button (not shown).

Next, the control procedure by the control circuit 21 will be described with reference to the flowcharts of FIGS. This program starts when the power supply battery is loaded into the camera. First, the variable W is set to zero in step S101. Next, in step S1, until the cartridge 5 is loaded (car
Wait until the switch SW2 is turned on), and when loaded, go to step S2. If it is determined in step S2 that the cartridge lid is open (the lid switch SW1 is on), the process returns to step S1, and the cartridge lid is closed (the lid switch SW1).
If it is determined to be OFF, the process proceeds to step S3. Step S
In step 3, the detection result of the use state detection device 27 is input, and it is determined whether or not the film in the loaded cartridge 5 is a partially removed film. If it is determined that the film is not a partially removed film, the process proceeds to step S4. If it is determined in step S4 that the film is not an unused film, that is, if it is determined that the film is a photographed film, the process proceeds to step S. Step S
In step 102, the variable W is set to 1, and in step S103, the output of a warning signal is started, and the flow advances to step S7. In response to the warning signal, the warning device 50 causes, for example, an unillustrated warning LED.
Lights or blinks to give a warning.

On the other hand, if it is determined in step S4 that the film is an unused film, the flow advances to step S5 to perform an unused film process. That is, after the film 1 is sent out from the cartridge and wound up on the take-up spool 12, the frame of the frame number 1 (the first frame) is opposed to the aperture 14. Since then
Film 1 for each frame while recording shooting information for each shooting
After winding the frame (final frame) of the frame number n, the film 1 is completely wound into the cartridge 5 and the film is rewound. If the halfway take-out switch SW4 is turned on before reaching the end, rewinding is performed at that point.

Next, in step S6, the identification display device 60 of the cartridge 5 is driven according to the use state of the film 1 (the film taken out halfway or the used film). That is, the spool drive shaft of the cartridge 5 is rotated by rotating the cartridge drive motor 28 in the reverse direction, and the index 61 is indicated by the number "2" (corresponding to the film taken out halfway) by the use state detection circuit 27 according to the use state of the film 1. Do)
Alternatively, when a state indicating the number "3" (corresponding to the used film) is detected, the motor is stopped. In step S7, the process waits until the cartridge lid is opened. When the cartridge lid is opened, the process proceeds to step S8. If it is determined in step S8 that the cartridge 5 has not been removed, the process returns to step S7, and if it is determined that the cartridge 5 has been removed, the process proceeds to step S104. If it is determined in step S104 that W ≠ 1, the process returns to step S1, and if it is determined that W = 1, the output of the warning signal is stopped in step S105 and the warning by the warning device 50 is released. It returns to step S1 as zero.

On the other hand, if it is determined in step S3 that the film is taken out halfway, the process proceeds to step S9 in FIG.
Is rotated forward, and the film 1 is sent out. Subsequently, in step S10, the film feed motor 30 is rotated forward through the motor drive circuit 31 to wind up the sent out film 1 onto the take-up spool 12. Start. Next, in step S11, perforation 3
Wait until b ′ is detected, and if detected, step S6
Wait until the perforation 3a is detected at 0, and when it is detected, it is determined that the foremost frame of the film (the frame of frame number 1; hereinafter, referred to as the top frame) faces the aperture 14. Proceed to step S12.

In step S12, the variable N indicating the film frame number is initialized to 1, the variable K for counting the perforations is initialized to zero, and the flag E is initialized to zero, and the flow advances to step S13. In step S13, the magnetic head 18 is operated via the reproducing circuit 23 to reproduce information from the magnetic recording area 2 of the film 1. If it is determined in step S14 that photographing information has been detected, that is, it is determined that the first frame has been exposed, the flag E is set to 1 in step S15, and the process proceeds to step S16. If it is determined that the image has not been exposed, the process proceeds to step S16. Steps S13 to S15 are repeated until perforation is detected in step S16, and if detected, the variable K is counted up in step S17 and the process proceeds to step S18. In step S18, K
= 2, that is, whether two perforations have been detected. If the result is negative, the process returns to step S13, and if the result is positive, the process proceeds to step S19. Here, an affirmative determination in step S18 indicates a state in which the winding of the first piece is completed and the next piece faces the aperture 14.

If it is determined in step S19 that E = 0, that is, if the first frame is not exposed, the flow advances to step S20 to stop winding the film, and then in step S21 the film 1 is exposed.
Is completely rewound into the cartridge 5. Next, in step S22, the identification display device 60 of the cartridge 5 is drive-controlled to indicate that the film is taken out halfway. That is, the cartridge drive motor 28 is rotated in the reverse direction to rotate the spool shaft of the cartridge 5, and the use state detection circuit 27 detects a state where the index 61 indicates the number "2" (corresponding to the film taken out halfway). Then the motor stops. Thereafter, the process proceeds to step S102 described above.

Here, in step S3, it is determined that the film is a halfway-taken film.
The fact that the leading frame is determined to be unexposed at 9 indicates that the loaded film is a halfway-extracted film previously photographed by the prewind camera, as shown in FIG. Therefore, the camera of this embodiment, which is a normal wind camera, prohibits photographing on the film and performs rewinding.

On the other hand, if it is determined in step S19 that E ≠ 0, that is, if the first frame has been photographed,
The film winding is continued, and the process proceeds to step S23 in FIG. In step S23, the variable M is reset to zero, and then in step S24, the flag F (N) is set to 1. Here, the flag F (N) is 1 when the frame of the frame number N has been photographed, and becomes 0 when the frame has not been photographed. In step S25, a variable N indicating the film frame number
Is incremented by “1”, and a variable K for perforation counting and a flag E are reset to zero. Next, in step S26, the information is reproduced by the magnetic head 18, and when the photographing information is detected in step S27, the flag E is set to 1 in step S28, and step S2 is performed.
The process proceeds to step S9, and if not detected, the process directly proceeds to step S29.

If it is determined in step S29 that the end of the film has not yet been reached, that is, it is determined that the end-of-film detecting device 25 has not output a signal indicating the end of the film, the process proceeds to step S30, and steps S26 to S26 are performed until perforation is detected. The process of S29 is repeated. When perforation is detected in step S30, step S30 is performed.
At step 31, the perforation count value K is incremented by "1", and the process proceeds to step S32. In step S32, K ≠ 2
When it is determined that K = 2, that is, when two perforations are detected, it is determined that the film has been wound up by one frame, and the process proceeds to step S33.

In step S33, it is detected whether or not E = 1, that is, whether or not the frame has been exposed. If the result is negative, the flow advances to step S34. In step S34, the flag F (N) is set to zero, and then in step S35, it is determined whether or not F (N-1) = 1. That is, it is determined whether or not the immediately preceding frame has been exposed. If step S35 is denied, step S25 is reached.
If the result is affirmative, the current frame number N is substituted for the variable M in step S36, and the process returns to step S25. Since the flag F (N) is set to 1 in step S24 and set to zero in step S34, the flag F (N) is set in step S35.
Affirmatively indicates that the frame is unexposed and the previous frame has been exposed, that is, the frame is the first unexposed frame, and in this case, step S36
To store the frame number as M.

If it is determined in step S33 that E = 1 (the frame has been exposed), F is determined in step S37.
It is determined whether (N-1) = 0 or not. If the result is negative, the process returns to step S24. If the result is affirmative, the process returns to step S2 in FIG.
Then, the film is rewound in the same manner as described above, and the identification display device 60 of the cartridge 5 is pointed to the film "2" taken out halfway. That is, F (N-1)
= 0 indicates that the frame has been exposed and the immediately preceding frame has not been exposed. This means that the loaded film is not exposed, for example, as shown in FIG. This indicates that the film has been shot by both a normal wind camera and a prewind camera. Therefore, in this case as well, photography is prohibited and the film is rewound as described above.

On the other hand, if the end of the film is detected in step S29 in FIG. 8, the process proceeds to step S38 in FIG.
Here, the end of the film is detected when the film is wound up to the end of the film without affirmation of step S37 in FIG. 8, which means that the loaded film has been photographed only in the normal wind first. This indicates that the film was taken out halfway or was used.

In step S38, winding of the film is stopped. Then, in step S39, it is determined whether or not M = 0. M is the frame number of the first unexposed frame as described above, and M = 0 indicates that the loaded film is a used film. Therefore, in this case, the process proceeds to step S40 to perform a film rewinding process of completely rewinding the film 1 into the cartridge 5, and in step S41, the identification display device 60 of the cartridge 5 displays the used film "3". Drive as indicated. Thereafter, the process proceeds to step S102 in FIG.

When it is determined in step S39 that M ≠ 0, it is determined that the film is a halfway-extracted film photographed only in normal wind, and steps S42 to S48 are performed.
To rewind the film to the frame of the frame number M. First, in step S42, the number of perforations I to be detected before the frame of the frame number M faces the aperture 14 is calculated by the following equation: I = 2 × (N + 1−M). That is, when the termination is determined in step S29, the perforations 3c have passed through the photoelectric element 17. On the other hand, in order to make the frame of the frame number M face the aperture, the perforation 3a of the frame may be detected. From this, the perforation number 2 of each frame is subtracted from the value obtained by adding 1 to the current frame number N (which is a value obtained by adding 1 to the frame number n of the last frame). The multiplied value is the number of perforations to be detected before the frame with the frame number M faces the aperture 14.

Next, in step S43, the count value K of the number of perforations is reset to zero, and in step S44
Then, the cartridge drive motor 28 is rotated in the reverse direction to start rewinding the film. In step S45, the process waits until perforation is detected.
In step 6, the value of K is incremented by "1", and the flow advances to step S47. If K = I is determined in step S47, it is determined that the frame of the frame number M has opposed the aperture, and the process proceeds to step S48. If K ≠ I is determined, the process returns to step S45 to repeat the above-described processing. . In step S48, the film rewinding is stopped, and the flow advances to step S49 in FIG.

In the step S49, the switch S is taken out halfway.
If it is determined that W4 has been turned on, that is, it has been instructed to take out halfway, the process proceeds to step S57 and proceeds to step S57.
At 57, a film rewinding process for completely rewinding the film 1 into the cartridge 5 is performed, and at step S58, the identification display device 60 of the cartridge 5 is driven so as to indicate the film "2" taken out halfway. Thereafter, the process proceeds to step S7 in FIG.

On the other hand, if step S49 is denied, the process proceeds to step S50. If it is determined in step S50 that the release switch SW3 is on, the process proceeds to step S51. If it is determined that the release switch SW3 is off, the process returns to step S49. Step S5
In step 1, the photographing is performed via the exposure control device 26. After the photographing is completed, the film is wound up by one frame in step S52. The recording of the photographing information for is performed.

When the winding of one frame is completed, step S53 is performed.
Increments M by "1" at step S54, and then at step S54 M =
N is determined. If step S54 is affirmed, it is determined that the shooting of the last frame (the frame at the end end) has been completed, and the process proceeds to step S55. If not, it is determined that the last frame has not been reached and the process returns to step S49. Step S5
In step 5, the film is rewound to the leading end, and in step S56, the identification display device 60 of the cartridge 5 is driven so as to point to the used film "3". Thereafter, the process proceeds to step S7 in FIG.

The procedure of control by the control circuit 21 has been described above. First, when the camera is loaded with the film and the back cover is closed, the film is sent out and wound up, and the identification display device 6 of the cartridge 5 is displayed.
From the state of 0, the use state of the loaded film 1 is determined. If the film is used, a warning is issued. If the film is not used, shooting is performed sequentially from the top frame.

In the case of a film taken out halfway,
First, information reproduction by the magnetic head 18 is performed on the foremost frame (leading frame) of the film. When it is detected that the photographed information is not recorded for the first frame (the first frame is an unexposed frame), the film 1 is curled.
All of them are rewound into the cartridge 5. That is, the fact that the film is a halfway-extracted film and the top frame is an unexposed frame means that the film is a halfway-extracted film (FIG. 4 (a) and FIG.
(A)). Therefore, double-exposure occurs when photographing is performed with the normal wind camera in this embodiment. Therefore, the film is rewound as shown in FIG. Shooting is prohibited. After rewinding, the film is identified and displayed to be taken out halfway.
Therefore, this film can be used later in a pre-wind camera.

On the other hand, when it is detected that the loaded film is a film taken out in the middle and the photographed information is recorded for the first frame (the first frame has been photographed), winding and information reproduction are performed. To continue. When an unexposed frame is detected, the frame number M is stored, and winding and information reproduction are continued. Thereafter, when it is detected that the film has not been exposed to the end, it is determined that the film is a partially removed film (FIGS. 4 (b) and 11 (b)) previously photographed only with a normal wind camera, As shown in FIG. 11 (b), the frame is rewound to the frame of the above-mentioned frame number M, and photographing is sequentially performed from this frame to the end side. And when the shooting of the last frame is completed, it is rewound,
An identification display indicates that the film has been shot.

If the exposed frame is detected before the end of the film is detected when the frame number M is stored and the winding and the information reproduction are continued, the film is loaded first with the normal wind camera and the normal wind camera. Film taken out by both prewind cameras (Fig. 4
(C) and FIG. 11 (c)), the film is rewound as shown in FIG. 11 (c) to prevent double exposure, and photographing with this film is prohibited. After rewinding, the film is identified and displayed to be taken out halfway. Therefore, this film can be used later in a pre-wind camera.

In the construction of the above embodiment, the cartridge driving motor 28, the film feeding motor 30, and the respective motor driving circuits 29, 31 constitute the feeding means, and the cartridge driving motor 28 and the motor driving circuit 29 constitute the motor. The display driving means, the use state detecting device 27 constitutes the film detecting means, the magnetic head 18 and the reproducing circuit 23 constitute the photographed information detecting means, and the control circuit 21 constitutes the controlling means.

In the above description, in the case of a halfway-extracted film shot by a prewind camera, the halfway-extracted film shot by both the normal wind camera and the prewind camera is identified as a halfway-extracted film after being rewound. Although the display is performed, it is also possible to identify and display the used film by replacing step S22 in FIG. 7 with step S59 in FIG. In this case, this film cannot be used, but double exposure can be reliably prevented.

Note that the identification display device is not limited to the one shown in FIG. 3. If the identification state of the film can be displayed and the use state can be detected by a camera, the above-mentioned US Pat. No. 4,965,600 is used. Other configurations as described in the specification may be used. When the identification display device described in the above specification is used, a display drive unit is separately required for exclusive use. In addition, although the information regarding the photographing is used as the photographed information, dedicated photographed information may be used separately from this photographing information. Further, the present invention can be applied to a camera that can switch between a normal wind system and a prewind system. In this embodiment, the identification display device is shown in FIG.
When the film is wound up to determine whether or not the leading edge piece has been photographed, the spool shaft rotates and the index 61 is shifted, so that after rewinding, the index is returned to the state when the index was inserted into the camera. However, it is necessary to control the drive, but using a film cartridge independent of the movement of the index and the rotation of the spool shaft as shown in the above-mentioned US Pat. No. 4,965,600, the display drive is performed as described above. If the means is provided separately, there is no need to control the drive after rewinding,
At any time while the cartridge is inserted, it is possible to identify the film being taken out or the used film.

[0045]

As described above, according to the present invention, when the loaded film is a film taken out in the middle and the photographed information is not recorded for the most distal end frame of the film, , Filming is banned, rewinding the film, and indicating that it is a halfway taken out film or used film, so that all the halfway taken out films taken with a prewind camera earlier are prohibited, In addition to preventing the double exposure, the use state of the film can be immediately judged after rewinding. According to the second aspect of the present invention, if the loaded film is a film taken out in the middle and the photographed information is recorded on the most distal end frame of the film, the winding and photographed information Continue the detection of, when the frame in which the photographed information is recorded is detected after the frame in which the photographed information is not recorded is detected, the photographing is prohibited in the same manner as described above, and the film is rewound, and The use of all pre-wound cameras and both pre-wound cameras and normal-wound cameras is prohibited, and double exposure is prevented. In addition to being able to do so, the use condition of the film can be immediately determined after rewinding.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control system of a camera according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a film.

FIG. 3 is a plan view showing a configuration of a cartridge identification display device.

FIG. 4 is a view showing three examples of a film taken out halfway.

FIG. 5 is a rear view showing the configuration of the camera.

FIG. 6 is a flowchart showing a processing procedure.

FIG. 7 is a flowchart following FIG. 6;

FIG. 8 is a flowchart following FIG. 7;

FIG. 9 is a flowchart following FIG. 8;

FIG. 10 is a flowchart following FIG. 9;

FIG. 11 is a diagram illustrating a feeding operation for each halfway-taken film.

FIG. 12 is a flowchart showing a modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film 2 Magnetic recording area 5 Film cartridge 14 Aperture 17 Photoelectric element 18 Magnetic head 21 Control circuit 22 Recording circuit 23 Reproduction circuit 24 Photoelectric conversion circuit 27 Usage state detection device 28 Cartridge drive motor 29, 31 Motor drive Circuit 30 Film feed motor 50 Warning device 60 Film status identification display device SW1 Lid switch SW2 Cartridge switch SW3 Release switch SW4 Midway takeout switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G03B 17/00 G03B 17/18 G03B 17/20 G03B 17/24

Claims (2)

(57) [Claims] 1. A film car for accommodating a film taken out halfway where photographed information is recorded for a photographed frame.
A camera capable of loading a cartridge, feeding means for feeding the film, display driving means for driving the film use state identification display means provided on the cartridge to identify and display the use state of the film, By determining the film use state identification display means,
Film detecting means for detecting whether or not the loaded film is an unloading film; and filmed information detecting means for detecting whether or not the photographed information is recorded when the film is wound by the feeding means, The film detecting means has detected that the loaded film is a film taken out halfway, and the photographed information detecting means has detected that photographed information has not been recorded for the foremost frame of the film. Control means for prohibiting photographing, rewinding the film by the feeding means, controlling the drive of the film use state display means by the display drive means, and identifying the used film. A camera that can use a film taken out halfway. 2. The film detecting means detects that the loaded film is a film taken out halfway,
And when the photographed information detecting means detects that the photographed information is recorded for the frame at the foremost end of the film, the detection of the winding and photographed information is continued, and the photographed information is recorded. When a frame in which the photographed information is recorded is detected after detecting a frame which has not been recorded, the film is rewound by the feeding means, and the film driving state identification display means is driven and controlled by the display driving means. 2. The camera according to claim 1, wherein the camera is used to identify the used film.