JPH1031243A - Discriminator for use state of film cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately discriminate the use state of a photographic film by discriminating either of a code part and a quiet zone is exposed to an discriminating opening in accordance with the contents of a counter having a specific constitution at the time of loading a film cartridge. SOLUTION: In the counter 84, a count value is increased one by one wherever a counting up signal is inputted, at the time of detecting a code pattern 26 by a photosensor 57 to count the number of the boundaries (transitions) between the white bars and black bars of the bar code 26 of the quiet zones, which are detected by the photosensor 57. The count value of the counter 84 is transmitted to a microcomputer 80 after counting is stopped. The microcomputer 80 discriminates whether the photographic film of the loaded film cartridge is unexposed or not based on the number of the transitions (count value) detected by the photosensor 57.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for identifying the use state of a film cartridge, and more particularly to an apparatus for identifying the use state of a photographic film housed in a film cartridge according to the position of a data disk plate. It is about.

[0002]

2. Description of the Related Art A new photographic system called an advanced photo system using a film cartridge in which a photographic film can be sent out of a cartridge body by rotation of a spool is known. In the film cartridge of the advanced photo system, a cover member that opens and closes the film delivery port is provided at the film delivery port instead of the conventional telemp. Furthermore, various information of the photo film stored in the cartridge body (film sensitivity, number of pictures that can be taken, etc.)
Is represented by a bar code, and a data disk on which the bar code is recorded is provided.

[0003] The data disk is configured to rotate together with the spool, and the bar code has a low reflection surface (hereinafter, referred to as a black bar) and a high reflection surface (hereinafter, referred to as a white bar).
Are alternately arranged, and a quiet zone as a wide low-reflection surface indicating a boundary between the code portions. The code pattern of this bar code is a reading opening provided in the cartridge body or an identification opening for identifying a use state described later while the spool is being rotated immediately after the film cartridge is loaded in the camera. And is read by the photo sensor.

Further, in this film cartridge, since all of the photographic film is stored in the cartridge body, the appearance of the stored photographic film is whether it is unexposed, exposed or developed. Can not be distinguished. Therefore, in order to prevent an exposed or developed film cartridge from being reloaded into the camera and taking an image, a bar code portion exposed to the identification opening is determined according to a use state. The use state can be identified by detecting this with a photo sensor on the camera side. For example, when film rewinding is completed and the film cartridge is taken out of the camera, if an exposed photographic film is stored in the film cartridge, the quiet zone is positioned in the identification opening so that the The stop position is controlled. When the stored photographic film is not exposed, the code portion is exposed to the identification opening. In order to prevent the stop position of the spool from being inadvertently shifted, the spool is not easily rotated by the spool lock mechanism when the cover member closes the film feed port.

Further, in a camera using such a film cartridge, in order to reduce the size of the camera and reduce the number of parts, the camera is used to engage with the spool with one motor and rotate the spool. Aside from rotating the spool driver on the side, the rotation of the spool driver is transmitted to an opening / closing drive shaft that temporarily engages with the lid member, and the lid member is rotated from the closed position to the open position. . In this camera, this rotation rotates the open / close drive shaft while rotating the spool in the film rewind direction in order to read the barcode and specify the position when the barcode is loaded. I try to make it.

[0006] The spool driver is adapted to engage an engaging projection provided on the spool driver with a key groove of the spool. However, the rotational position of the engagement protrusion does not always coincide with the key groove of the spool depending on the use state of the previously used film cartridge at the time of removal and the use state of the loaded film cartridge. For this reason, the spool driver is slidable, for example, in the axial direction of the spool, and is pushed up against the bias of the spring until the rotational position with the key groove coincides with each other. It is adapted to be engaged.

By using a single photo sensor, the number of boundaries (transitions) between the white bar of the bar code obtained from the start of the rotation of the spool driver and the black bar or the quiet zone is counted. The applicant of the present invention has proposed a method of identifying whether a quiet zone or a code portion of a bar code is present in the identification opening and identifying the use state of the photo film in the loaded film cartridge. In this method, the spool driver is rotated by a motor, and at the same time, the reflected light from the bar code is detected by a photo sensor, and the number of bar code transitions is counted. Also, the width (angle) of the low reflection surface (black bar or quiet zone) detected by the photo sensor is checked. The transition counting is stopped when the quiet zone is detected, and based on the count value at this time, whether the code portion or the quiet zone is present in the identification opening at the time of loading is used, and the use of the photo film is performed. Identify the state.

[0008]

However, in the case of a camera in which the lid member is opened and closed and the spool is driven by one motor, the above-described identification method has a problem in reliability. When the motor is driven to open the lid member, the spool driver also starts rotating. For example, when the engagement protrusion of the spool driver does not match the key groove of the spool, the tip of the spool driver or the engagement protrusion and the spool may be rotated. The rotational force is applied to the spool by friction with the end face of the spool. However, when the lid member is closed, the rotation of the spool is prevented by the spool lock mechanism, so that the spool rotates by a small amount in the forward and reverse directions by the rotational force, and this movement is transmitted to the data disk as it is. This is because the photo sensor repeatedly detects the same boundary between the white bar and the black bar or the same boundary between the white bar and the quiet zone, causing a phenomenon that the number of transitions becomes larger than the actual number.

Even if the engagement protrusion of the spool driver and the key groove of the spool match, the gear integral with the spool and the lock lever engaged with this gear are used until the lid member is opened. The spool lock mechanism is working, and the behavior is unstable because it forcibly gets over it. Then, even when the lid member is opened, the spool rotates together with the release of the spool lock mechanism. Therefore, immediately after the rotation of the spool driver, the data disk behaves in an unstable manner. Therefore, the photo sensor may mistake the black bar as a quiet zone,
The inconvenience of repeatedly detecting the same boundary part occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is an object of the present invention to identify a use state of a photographic film stored in a loaded film cartridge without stopping or reversing the data disk. It is an object of the present invention to provide a film cartridge use state discriminating apparatus capable of correctly discriminating the use state even when stable behavior occurs.

[0011]

In order to achieve the above object, according to the first aspect of the present invention, a code section and a quiet zone are arranged to face an identification opening of a loaded film cartridge and photoelectrically detect a code section and a quiet zone. After loading the photo sensor and the film cartridge, the spool driver engaged with the spool is rotated, and the photo sensor is started to perform photoelectric detection. Based on the result of the photoelectric detection, a quiet zone is detected in a predetermined pattern. A counter that counts the number of boundaries between the white bar and the black bar and the white bar and the quiet zone detected by the photo sensor until the reference code pattern in the order of the detected code portion and the quiet zone is first detected; and Depending on the content of the film, the cord and Those which of jet zone includes a discriminating means for discriminating whether or been exposed.

According to the second aspect of the present invention, the photosensor is disposed opposite to the identification opening of the loaded film cartridge and photoelectrically detects the code portion and the quiet zone. The photosensor is connected to the spool after the film cartridge is loaded. While rotating the spool driver, the photoelectric detection by the photo sensor is started, and based on the result of the photoelectric detection, the reference code pattern in the order of the quiet zone, the code portion detected in the predetermined pattern, and the quiet zone is firstly set. At the time of detection, whether the code portion or the quiet zone was exposed at the identification opening when the film cartridge was loaded, depending on whether a pattern other than the predetermined pattern was detected from the code portion before this reference code pattern. Is provided.

According to the third aspect of the present invention, when the photographic film accommodated in the cartridge body is not exposed, the code portion is exposed from the identification opening, and when the photographic film is not unexposed, the code portion is quiet from the identification opening. The zone is exposed, and the discriminating means determines that the code pattern exposed in the identification opening at the time of loading the film cartridge is a code portion, and the film cartridge removes the unexposed photographic film. If the film cartridge is stored and if it is determined to be in the quiet zone, it is determined that the film cartridge stores a photographic film other than unexposed.

According to the present invention, the discriminating means has a measuring means for measuring an angle of rotation of the supple driver, and is output when the photo sensor detects a black bar or a quiet zone. When the level of the photoelectric signal to be output is set to the first level and the level of the photoelectric signal output when the white bar is detected is set to the second level, the measurement by the measuring means and the output from the photo sensor are performed. Based on the level of the generated photoelectric signal, the spool driver rotates more than a predetermined angle while the first level photoelectric signal is being generated, and then the second level and the first level photoelectric signal are output a plurality of times. The supple driver rotates at a predetermined angle with respect to the black bar and the white bar during each of the periods in which the photoelectric signals of each level occur alternately. To, by the spool driver is rotated above a predetermined angle while the photoelectric signal of the first level is generated after this, it is to determine that detects the reference code pattern.

According to a fifth aspect of the present invention, the measuring means detects that the spool driver has been rotated by a predetermined angle by counting the encode pulses generated each time the spool driver rotates by a predetermined angle. It is.

[0016]

2 and 3, a film cartridge 10 has a cartridge body 11 inside.
A spool 13 around which the photo film 12 is wound is rotatably accommodated, and the photo film 12 is sent out of the cartridge body 11 from the leading end by rotating the spool 13 in the film feeding direction. Further, by rotating the spool 13 in the film rewinding direction, the photographic film 12 can be rewound into the cartridge body 11.

The cartridge body 11 includes an upper case 11a and a lower case 11b made of resin.
The a and 11b are assembled to each other by an engaging claw 16 provided on the lower case 11b, and a label 17 is attached to the outer periphery of these. A film delivery port 20 for delivering the photographic film 12 is formed on the joint surface between the cases 11a and 11b. The film feed port 20 is provided with a lid member 21 for preventing external light from entering the cartridge body 11. The lid member 21 is formed with an engagement hole 22 having a key groove 22a at each end thereof. A drive shaft for opening / closing the camera is engaged with the engagement hole 22 when the camera is mounted on the camera. By rotating the drive shaft for opening / closing, the cover 21 closes the film feed port 20. And an open position where the film feed port 20 is opened.

The spool 13 includes a spool shaft 23, a pair of flanges 24, and a rotating member 25. The spool 13 is provided with a data disk 27 integrally therewith. The spool shaft 23 is formed with an engagement hole 28 having a key groove 28a at each end of the spool shaft 23. A drive shaft (hereinafter referred to as a camera shaft) which engages with the engagement hole 28 when the spool shaft 23 is mounted on the camera. , A spool driver) to rotate in the film feeding direction or the film rewinding direction.

The rotating member 25 includes a gear 30 and a display plate 31.
Are integrally formed, and these rotate integrally with the spool shaft 23. The gear 30 of the rotating member 25 and the lock lever 32 constitute a spool lock mechanism. The lock lever 23 is disposed in the cartridge main body 11 so as to be swingable between a spool lock position where one end 23a is engaged with the gear 30 and a release position where the engagement is released. The lock lever 23 is driven by the lid member 21 and is swung to the engagement position when the lid member 21 is at the closed position, so that the spool is locked and the rotation of the spool 13 is prevented. This prevents the positions of the display plate 31 and the data disk 27 from being inadvertently shifted from the position corresponding to the use state of the photo film 12. When the cover member 21 is in the open position, the cover member 21 is set to the release position, the spool is unlocked, and the rotation of the spool 13 is allowed.

FIG. 4 shows an example of the code pattern 26 formed on the data disk 27. The code pattern 26 is composed of a quiet zone 35 formed by partially cutting out the data disk 27 in a fan shape, and black bars 37 a and 3 of a low reflection surface written on the data disk 27.
7b and a code section 36 in which white bars 38a and 38b of a high reflection surface are alternately arranged. Since the quiet zone 35 is formed as a notch in the data disk 27, when this portion is detected by a reflection type photosensor such as a camera, it is handled in the same manner as the black bars 37a and 37b. Black bar 37a, 3 of part 36
7b, the width (angle) thereof is sufficiently widened to indicate the division of the code portion 36.

The code section 36 comprises a wide black bar 37a and a white bar 38a, and a narrow black bar 37b and a white bar 38b. These four types of bars 37a and 3b are provided.
By arranging 7b, 38a, 38b in a predetermined order, the sensitivity of the photographic film 12, the number of storable images, and the like are represented.
In addition, the low reflection surface adjacent to the quiet zone 35
It is treated as a quiet zone 35. While the data disk 27 is rotating together with the spool 13, the code pattern 26 is
Is read, and the information of the code section 36 is decoded.

The angle of the quiet zone 35 and the angles and arrangement of the bars 37a, 37b, 38a, 38b of the cord section 36 are predetermined. For example, the angle of the quiet zone 35 is about 170 degrees, and each bar 37a,
The angles of 37b, 38a, 38b are set in the range of 3 degrees to 40 degrees. For example, the angle of each wide bar 37a, 38a is 20 degrees, and the angle of each narrow bar 37b, 38b is 1
0 degrees. The code section 36 has a white bar of 7
It is determined that there are a total of 13 books and 6 black bars. Further, the relative angle between the key groove 28a of the spool 13 and the data disk 27 is also determined.

FIG. 5 shows the positions of the key groove 28a, the display plate 31, and the data disk 27 for each use state of the photographic film 12. When the photographic film 12 has not been exposed, as shown in FIG.
Is exposed from the circular display window 40a among the four display windows 40a to 40d formed on one side surface of the cartridge body 11. At this time, the code portion 36 of the data disk 27 is exposed to the identification opening 41 formed on the other side surface of the cartridge body 11.

When a part of the photographic frame of the photographic film 12 has been exposed (hereinafter, referred to as partially exposed),
As shown in FIG. 5B, the display plate 31 is exposed from the semicircular display window 40 b, and the rear end of the code portion 36 is slightly exposed at the counterclockwise end of the identification opening 41. The quiet zone 35 is located in the portion.

FIG. 5C shows a case where all the photographed frames of the photographic film 12 have been exposed. In this case,
The display panel 31 is exposed from the cross-shaped display window 40c. When the image has been developed, the display plate 31 is exposed from the rectangular display window 40d as shown in FIG. The quiet zone 35 is located in the identification opening 41 in both the exposed and developed cases.

Also, the spool 13 is shown in FIGS.
As shown in (d), the key groove 28a is moved to the unexposed position U in accordance with the use state of the stored photo film 12.
s, the partially exposed position Ps, the exposed position Es, and the developed position Prs so that the photographic film 12 is attached to the cartridge body 11 in a camera or a printer.
After rewinding the spool 13, the stop position of the spool 13 is determined.

Reference numeral 43 denotes a reading opening for reading the information of the code pattern 26 by the photo sensor. The reading opening 43 or the identification opening 41 is used.
Needless to say, the information of the code pattern 26 can be read from any of the above.

FIG. 6 shows a camera using the film cartridge 10. The camera 50 identifies whether the photographic film 12 of the loaded film cartridge 10 has not been exposed or is in another use state. As is well known, a cartridge loading chamber 51 is formed in the camera 50, and the bottom surface thereof is an opening 52. The opening 52 is opened and closed by a bottom cover 53, and a lock lever 54 provided on the side surface of the camera 50 is slid in the direction of the arrow, whereby the bottom cover 53 is locked in a closed state. When the lock lever 54 is slid in the direction opposite to the arrow, the bottom cover 53 is unlocked, and the bottom cover 53 is opened, so that the film cartridge 10 can be loaded and unloaded.

The film cartridge 10 is placed in the cartridge loading chamber 51 with the data disk 27 facing upward.
Is loaded inside. A spool driver 55 is provided at a position facing the engagement hole 28 of the spool 13, and an opening / closing drive shaft 56 is provided at a position facing the engagement hole 22 of the lid member 21 so as to protrude from the inner wall of the upper surface of the cartridge loading chamber 51. And inserted into the corresponding engagement holes of the loaded film cartridge 10.

Further, a reflection type photo sensor 57 is arranged at a position facing the identification opening 41. As shown in FIG. 5, the photo sensor 57 is disposed so as to face the vicinity of the counterclockwise end of the identification opening 41. The photo sensor 57 emits detection light from the light emitting unit, and reflects the reflected light reflected by the code unit 36 through the identification opening 41 or the reflected light reflected by the surface of the cartridge body 11 through the quiet zone 35. Light is received by the light receiving section. Then, it outputs a photoelectric signal according to the light intensity of the reflected light. This photoelectric signal is used for identifying a use state and reading information of a code pattern.

In FIG. 7, a driving force from a motor 60 built in the camera 50 is transmitted to a spool gear 62 via a speed reduction mechanism 61. On the lower surface of the spool gear 62, a cylindrical driver shaft 62a inserted into the engagement hole 28 of the spool 13 is integrally formed. Inside the driver shaft 62a, an inner cylindrical portion 63 having an engagement protrusion 63a engaged with the key groove 28a is slidably inserted, and the engagement protrusion 63a is formed on the outer peripheral surface of the driver shaft 62a. Projected from the opening 62b. These spool shafts 62a and the engagement projections 63a make the spool driver 55
Is composed.

A coil spring 64 is disposed above the inner cylindrical portion 63. The coil spring 64 is pressed downward by a pressing portion 66 provided integrally with the interlocking lever 65, and pushes the cylindrical portion 63 downward (camera). In the direction of the bottom). As a result, the keyway 2 of the loaded film cartridge 10 is
Even when the position of the engagement protrusion 63a of the spool driver 55 does not coincide with the position of the engagement protrusion 63a, the engagement protrusion 63a moves upward against the bias of the coil spring 64. Insertion is allowed. And
When the spool driver 55 rotates and the positions of the key groove 28a and the engagement protrusion 63a coincide with each other, the engagement protrusion 63a slides downward by the bias of the coil spring 64, and the key groove 28
a.

In the following description, the key groove of the spool 13 stopped at each of the unexposed position Us, the partially exposed position Ps, the exposed position Es, and the developed position Prs of the loaded film cartridge 10 will be described. 28a and the engagement protrusion 63
The positions of the spool driver 55 where the positions a coincide will be described as an unexposed position Ud, a partially exposed position Pd, an exposed position Ed, and a developed position Prd, respectively.

When removing the film cartridge 10 from the cartridge loading chamber 51, the spool driver 55
Is the unexposed position U according to the use state of the photographic film 12.
The control is performed so as to stop at either d or the exposed position Ed. Therefore, the spool driver 55 sets the unexposed position Ud or the exposed position E according to the use state of the film cartridge 10 used last time.
In step s, the spool 13 of the film cartridge 10 is received.

On the upper surface of the spool gear 62, a three-tooth gear 67 is integrally formed. This interlocking gear 67
Engages with the three-tooth sector gear 68a of the opening / closing rotation member 68 while the spool driver 55 is rotating counterclockwise, and rotates the opening / closing rotation member 68 clockwise.
An opening / closing drive shaft 56 is integrally formed on the lower surface of the opening / closing drive member 68 coaxially therewith.
An engagement protrusion 56a that engages with the key groove 22 of the cover member 21 is formed on the peripheral surface of the cover member 21.

The opening / closing rotary member 68 is connected to a first urging sector gear 70 disposed above the connecting member via a connecting pin 71, and these rotate coaxially and integrally. This first
The urging sector gear 70 meshes with the second urging sector gear 72. The second urging sector gear 72 is urged clockwise by a toggle spring 73 when the film cartridge 10 is loaded.

The interlocking lever 65 is coaxial with the second biasing sector gear 72 and is rotatably disposed below the second urging sector gear 72.
It is rotated by. One end 65a of this interlock lever 65
The connection pin 71 described above is arranged on the movement trajectory.

FIG. 8 schematically shows the operation of the spool gear 62 and the opening / closing rotary member 68 configured as described above. When the bottom cover 53 is locked, as shown in FIG. 8A, one end 65a of the interlocking lever 65 is at a position separated from the opening / closing rotating member 68 in the counterclockwise direction. Further, the opening / closing rotary member 68 is urged counterclockwise by the urging force of the toggle spring 73 via the second urging sector gear 72, the first urging sector gear 70, and the connecting pin 71. In this state, when the motor 60 rotates in the reverse direction, the spool gear 62 rotates counterclockwise, and the spool driver 55 rotates in the film rewinding direction. Further, with the rotation of the spool gear 62, the interlocking gear 67 rotates counterclockwise.

When the interlocking gear 67 meshes with the sector gear 68a, as shown in FIG.
, And the first urging sector gear 70 connected thereto are both rotated clockwise. By the rotation of the opening / closing rotation member 68, the opening / closing drive shaft 56 is rotated from a position corresponding to the closed position of the lid member 21 to a position corresponding to the open position. Further, the first biasing sector gear 70 rotates the second biasing sector gear 72 counterclockwise against the biasing force of the toggle spring 73.

When the opening / closing rotating member 68 further rotates and the second urging sector gear 72 rotates by a predetermined angle, the toggle spring 73 is inverted as shown in FIG. 8C. The biasing direction of the second biasing sector gear 72 is reversed. The urging force of the toggle spring 73 causes the second urging sector gear 72 to rotate clockwise, and via the first urging sector gear 70 and the connecting pin 71, the opening / closing rotary member 6.
8 further rotates clockwise. For this reason, the sector gear 68a is rotated to the retracted position retracted from the movement locus of the interlocking gear 67, and is held at this retracted position. At this time,
The opening / closing drive shaft 56 rotates to a position corresponding to the open position of the lid member 21. Also, in this state, even if the supple gear 62 rotates clockwise or counterclockwise thereafter,
The interlocking gear 67 does not mesh with the sector gear 68a.

When the film cartridge 10 is taken out, the lock lever 5 is moved to a position where the bottom cover 53 is unlocked.
When the slide 4 is slid, the interlock lever 65 is rotated clockwise by the drive pin 74 as shown in FIG. At this time, since the one end 65a of the interlocking lever 65 presses the connecting pin 71 clockwise, the opening / closing drive member 68, the first urging sector gear 70, and the second urging dynamic sector gear 72 resist the urging of the toggle spring 73. Then, the biasing direction of the toggle spring 73 is reversed by being rotated in the opposite direction to that described above. Thus, the opening / closing drive shaft 56 is rotated from a position corresponding to the open position of the lid member 21 to a position corresponding to the closed position. FIGS. 8A and 8D show a case where the spool driver 55 is at the exposed position Ed, respectively.

When the spool driver 55 is in the developed position Prd
Is an opening operation area in which the interlocking gear 67a meshes with the sector gear 68a. For example, when the spool driver 55 detects the exposed position Ed or the unexposed position Ud
Is set in the vicinity of the spool gear 62, the position of the opening / closing drive shaft 56 cannot be determined, and when the film cartridge 10 is taken out, the cover member 21 is not completely rotated to the closed position, When the film cartridge 10 is loaded, the opening / closing drive shaft 56 or the cover member 21 may be broken by receiving the next film cartridge 10 with the opening / closing drive shaft 56 that does not correspond to the closing position of the cover member 21. . But with the camera,
When the photo film 12 is used, the spooled driver 55
Is not stopped at the developed position Prd, and the cover member 21 is located near the developed position Prd of the spool driver 55.
Is set to perform the opening operation.

In FIG. 9 showing the electrical configuration of the camera 50, a microcomputer 80 temporarily stores data necessary for various controls, and performs various controls with a RAM 80a used as a work memory. Is connected to the ROM 80b in which a program for the program is written.
The microcomputer 80 controls each unit of the camera 50 based on a program in the ROM 80b.

The photoelectric signal from the photo sensor 57 is sent to a binarization circuit 81. The binarization circuit 81 outputs a bar code signal obtained by binarizing the photoelectric signal at an appropriate threshold level. The bar code signal becomes "H level" when the photo sensor 57 detects the white bars 38a, 38b of the bar code 26, and the black bars 37a, 3
7b and when the quiet zone 35 is detected, the level becomes “L level”. This bar code signal is sent to the transition detection circuit 82, the pulse width detection circuit 83, and the microcomputer 80.

When the bar code signal changes from “H level” to “L level”, the transition detection circuit 82
And when the level changes from "L level" to "H level", a count-up signal is generated.
Send to 4. The counter 84 resets the count value Ct to “0” by the microcomputer 80 before the detection of the code pattern 26 by the photo sensor 57, and resets the count value Ct to 1 every time the count-up signal is input.
Increment by one. Thereby, the photo sensor 5
7 detect the white bars 37a, 38b of the barcode 26.
And the number of boundaries (transitions) with the black bars 37a, 38b or the quiet zone 35 are counted. After the count value Ct of the counter 84 stops counting,
The photo film 12 is sent to the microcomputer 80 to identify the use state of the photo film 12.

The motor driver 85 is controlled by the microcomputer 80 to rotate the motor 60 forward or backward. The spool drive mechanism 86 includes a speed reduction mechanism 61, a spool gear 62, and the like, and rotates the spool gear 62 by rotating the motor 80 to rotate the spool 13. The lid member opening / closing mechanism 87 is composed of an interlocking sector gear 67 of the spool driver 62, an opening / closing driving member 68, first and second urging sector gears 70 and 72, and opens and closes in conjunction with the rotation of the spool gear 62. The cover member 21 is rotated by the drive shaft 56 for use.

The motor rotation sensor 86a includes, for example, an encoding plate that has a large number of radially formed slits formed at a constant pitch, is rotated by the rotation of the motor 60 transmitted through a spool drive mechanism 86, and has a slit formed on the encoding plate. The encoder includes a photo-interrupter for monitoring passage and a pulse generator connected to the photo-interrupter and generating an encode pulse when the photo-interrupter detects a slit of the encoding plate. Motor 6
0 is rotated by a certain angle, that is, the spool driver 5
The motor rotation sensor 86a generates an encode pulse each time the spool driver 55 rotates by a fixed angle because the encode plate is also rotated by a fixed angle every time the 5 rotates by a certain angle. This encode pulse is supplied to a pulse width counter 83.
Sent to

Note that an encoder may be directly connected to the rotating shaft of the motor 60 to extract an encode pulse.
Further, the spool driver 55 may be used by other devices.
May be generated every time the motor rotates a fixed angle. When a pulse motor is used as the motor 60, the spool driver 55 is controlled in accordance with the number of motor drive pulses supplied to the motor. By rotating the angle, by counting the motor drive pulse,
The rotation angle of the spool driver 55 may be detected.

The pulse width detection circuit 83 counts the number of input encode pulses as a count value Cp. This count value Cp is determined when the bar code signal changes from “H level” to “L level”, and It is reset to "0" when it changes from "L level" to "H level". The count value Cp of the pulse width detection circuit 83 is
The rotation angle of the spool driver 55 when the photo sensor 57 detects any one of the black bars 37a and 37b, the white bars 38a and 38b, and the quiet zone 35 is sent to the microcomputer 80.

Immediately after the start of rotation of the spool driver 55, the spool 13 and the data disk 27 do not rotate stably due to reverse rotation or stoppage. For example, when the lid member 21 is in the closed position, the engagement protrusion 63a of the spool driver 55 and the key groove 28 of the spool 13
a is not engaged, the engagement hole 2 of the spool 13
The spool 13 attempts to rotate due to friction generated between the shaft 8 and the driver shaft 62a. However, since the spool 13 is in the spool locked state, the spool 13 keeps stopping, or reciprocates such that the spool 13 immediately reverses and returns to the original position even if rotated. Therefore, the data disk 27 shows the same behavior. Hereinafter, such a behavior is referred to as a first behavior.

When the cover member 21 is in the closed position and the engaging projection 63a and the key groove 28a are engaged, the spool 30 is forcibly rotated while the lock lever 32 repeatedly passes over the gear 30 of the spool lock mechanism. Since the data disk 13 rotates, the data disk 27 rotates with a stop or slight reverse rotation. Hereinafter, this is referred to as a second behavior.

When the spool gear 62 is rotating in the opening operation area, the interlocking gear 67 meshes with the sector gear 68a to rotate the opening / closing rotary member 68 against the urging force of the toggle spring 73. Therefore, the engagement protrusion 63a and the key groove 28a
Data disk 27 regardless of whether or not
Is unstable, and the data disk 27 stops or violently reverses. Hereinafter, the behavior in the opening operation area is referred to as a third behavior.

Even after the lid member 21 is in the open position, if the engagement protrusion 63a and the key groove 28a are not engaged, friction occurs between the engagement hole 28 and the driver shaft 62a. In some cases, the disk 27 rotates, and in other cases, the disk 27 remains stopped, but does not reverse. Hereinafter, such a behavior is referred to as a fourth behavior. After the lid member 21 is in the open position, the engagement protrusion 63
If the key groove 28a is engaged with the key groove 28a, the data disk 27 rotates smoothly and stably with the spool driver 55.

In order to prevent such misjudgment of the use state due to various behaviors of the data disk 27, the microcomputer 80 sets the bar code signal and the count value C
The detection of the quiet zone 35 and the detection of the code portion 36 are performed using p and p. The number of transitions (= count value Ct) detected by the photosensor 57 by the time when the quiet zone 35, the code portion 36 in which the predetermined pattern is detected, and the reference code pattern in the order of the quiet zone 35 are first detected. Based on this, it is determined whether the photographic film 12 of the loaded film cartridge 10 has not been exposed or not.

Whether or not the code portion 36 is detected in a predetermined pattern is determined based on whether or not the following conditions are satisfied. The count value Cp counted while the "H level" or "L level" bar code signal is being generated is calculated by the bars 37a, 37b, 38a, 38b of the code section 36.
It corresponds to the angle. That 13 count values Cp satisfying the following are continuously obtained, and the preceding and succeeding count values are quiet zones.

When the bar code signal is at "L level", the microcomputer 80 determines that the count value Cp is equal to the number of encode pulses generated when the spool driver 55 is rotated by 90 degrees or more (hereinafter referred to as a second reference pulse). Value), it is determined that the photo sensor 57 has detected the quiet zone 35. If an incomplete code portion 36 that does not satisfy the above conditions is detected thereafter, this determination is incorrect. If there is, the determination of the quiet zone 35 is performed again. Also, the count value C
When examining whether or not p corresponds to the angle of each bar 37a, 37b, 38a, 38b of the cord, it is preferable to provide an allowable range in consideration of the measurement error.

When the use state is identified, the count value Ct of the counter 84 at the time when the above-mentioned reference code pattern is detected is read, and the count value Ct is compared with the first reference value of the value 20. Do. If the count value Ct is equal to or less than the first reference value in this comparison, it is determined that the photographic film 12 of the loaded film cartridge 10 is other than unexposed. If the count value Ct is larger than the first reference value, it is determined that the photographic film 12 of the loaded film cartridge 10 has not been exposed.

When the film cartridge 10 is not exposed, the transition detected by the photosensor 57 is performed between the time when the photosensor 57 first starts the detection from the quiet zone 35 and the time when the reference code pattern is detected. The number is the transition number “14” for one round of the code pattern 26. Photo film 1
When 2 is partially exposed, the photo sensor 57 may detect the rear end of the code section 36 at the time of loading, so that the number of transitions may fluctuate by about +1 to +3.

When the unexposed film cartridge 10 is loaded, the photosensor 57 starts detection from the first half of the code section 36. Also, when the reference code pattern is detected, the transition number “7” of the latter half of the code part 36 is changed to the transition number “14” of the detected code part 36 as a complete code.
Is added to “21”. Therefore, 14 (+1
To +3) to the first reference value in the range of 21 to the count value Ct.
Can be used to identify the use state.
Therefore, in this embodiment, the first reference value is used.
The black bars 37a, 37b,
When the number of the white bars 38a, 38b is increased or decreased, it goes without saying that the value of the first reference value is changed.

Next, the operation of the above configuration will be described with reference to FIG. The bottom cover 53 is opened, and the film cartridge 10 is loaded in the cartridge loading chamber 51. The spool driver 55 is at the unexposed position Us or the exposed position Es according to the use state of the film cartridge 10 taken out last time. Therefore, if the position of the spool 13 of the currently loaded film cartridge 10 matches the position of the spool driver 55, the driver shaft 62a is inserted into the engagement hole 28 of the spool 13 and the key shaft 28a is engaged. The projections 63a engage, but when they do not match, the engagement projections 63a are pushed upwards at the peripheral edge of the engagement hole 28 against the bias of the coil spring 64, so that they do not engage. The opening / closing drive shaft 56 is engaged with the engagement hole 22 of the lid member 21 at the closed position.

When the bottom cover 53 is closed and the lock lever 54 is slid to lock the bottom cover 53, a closing signal is input to the microcomputer 80. When the microcomputer 80 receives the close signal, it first resets the counter 84 to set the count value Ct to “0”.
Further, the pulse width detection circuit 83 is initialized and its count value Cp is set to “0”. Thereafter, the photo sensor 57
Is turned ON.

Next, the microcomputer 80 identifies the use state of the photographic film 12 and the code pattern 26.
In order to read the information, the motor drive signal is sent to the motor driver 85 to rotate the motor 60 in the reverse direction. Motor 6
The rotation of 0 rotates the spool gear 62 counterclockwise in FIG. This spool gear 62
Reaches the opening operation area, the interlocking gear 67 meshes with the sector gear 68a of the opening / closing rotation member 68, and the opening / closing rotation member 68 is turned against the biasing force of the toggle spring 73. As a result, the opening / closing drive shaft 56 rotates the lid member 21 from the closed position to the open position. When the opening / closing rotation member 68 is rotated by a predetermined angle, the toggle spring 73 is inverted, and the bias of the toggle spring 73 causes the sector gear 68a to rotate to the retracted position. Thereby, the lid member 21 is rotated to the open position. After this, the spool gear 62 continues to rotate.

When the spool gear 62 rotates, an encode pulse is generated from the motor rotation sensor 86a every time the spool gear 62 rotates by a predetermined angle. This encode pulse is sent to the first and second pulse width detection circuits 83 and 88, and the first and second pulse width detection circuits 83 and 88 respectively count the count values Cp1 and Cp1 each time the encode pulse is input.
Increment p2 by "1".

On the other hand, when the spool driver 55 rotates, the data disk 27 first shows the first behavior or the second behavior depending on the positions of the spool 13 and the spool driver 55. When the spool gear 62 rotates in the opening operation area, the data disk 27 exhibits the third behavior. Furthermore, even after passing through the opening operation area, the robot may rotate while exhibiting the fourth behavior. In any case, if the data disk 27 passes through the opening operation area and is engaged with the engagement protrusion 63a of the spool driver 55 and the key groove 28a, the data disk 27 rotates stably with the rotation of the spool driver 55. Move.

In this manner, while the data disk 27 exhibits the first to fourth behaviors or rotates stably thereafter, the photo sensor 57 emits the detection light toward the identification opening 41. It emits light and outputs a photoelectric signal corresponding to the intensity of the received reflected light. This photoelectric signal is converted into a bar code signal by a binarization circuit 81, which is converted into a bar code signal by a transition detection circuit 82, a pulse width detection circuit 83, and a microcomputer 8
Sent to 0.

For example, when the position where the photo sensor 57 faces from one of the quiet zone 35 and the black bars 37a and 37b to one of the white bars 38a and 38b in accordance with the behavior of the data disk 27, the bar code The signal changes from “L level” to “H level”.
When the bar code signal changes from “L level” to “H level”, the transition detection circuit 82 generates a count up signal and sends it to the counter 84. Counter 84
The current count value Ct is incremented by 1 in response to the input of the count-up signal.

The pulse width detection circuit 83 resets the count value Cp to “0” when the bar code signal changes from “L level” to “H level”, and then starts counting the encode pulses again. I do.

Further, when the position where the photo sensor 57 faces from one of the white bars 43a and 43b to one of the quiet zone 35 and the black bars 42a and 42b, the bar code signal changes from "L level" to "L". The level changes to “H level”, and the count value Ct of the counter 84 is incremented by 1 with the count-up signal from the transition detection circuit 82. Also, the pulse width detection circuit 83
Resets the count value Cp to “0” when the barcode signal becomes “H level”, and then starts counting the encode pulses.

Of course, when the data disk 27 reciprocates or stops, the photo sensor 57 is moved to the quiet zone 35, the black bars 37a and 37b, and the white bar 38.
If the state facing any one of a and 38b is maintained, at this time, the count value Ct of the counter 84 is not incremented unless there is a change in the level of the barcode signal. However, in the pulse width detection circuit 83, the count value Cp is incremented by "1" each time an encode pulse is generated, that is, each time the spool driver 55 rotates by a certain angle.

As described above, the bar code signal and the count value C obtained based on the detection result of the photo sensor 57 are obtained.
p is monitored by the microcomputer 80 simultaneously with the start of rotation of the motor 60. Then, when the monitored bar code signal becomes “L level”, the microcomputer 80 sequentially compares the count value Cp, which is sequentially updated every time the spool driver 55 rotates by a certain angle, with the third reference value. When these values become the same, it is determined that the photo sensor 57 has detected the quiet zone 35. If the bar code signal becomes “H level” and the count value Cp becomes “0” before these values become the same, it is determined that the bar code signal is not in the quiet zone 35 and then the bar code signal of “L level” During the period in which is input, the count value Cp is compared with the third reference value to check whether the quiet zone 35 is detected.

When it is determined that the first quiet zone 35 has been detected, the microcomputer 80 predicts that the photosensor 57 will detect the next time using the change in the level of the bar code signal input thereafter and the count value Cp. Bars 37a, 37b, 38 of the code portion 36
Check whether the width of a, 38b is a predetermined width,
It is determined whether the above condition is satisfied. Specifically, when the input barcode signal changes, the count value Cp input from the pulse width detection circuit 83 immediately before the barcode signal changes to a value corresponding to the bar width of 10 or 20 degrees. Check whether or not. If it is determined that the condition is satisfied, it is determined whether or not 13 detected bars are continuous.

When it is determined that 13 bars are continuous,
The microcomputer 80 determines whether the photo sensor 57 has detected the quiet zone 35 while the next “L level” barcode signal is being input in the same procedure as described above. If the photo sensor 57 determines in this determination that the quiet zone 35 has been detected, the microcomputer 80 detects the code portion 36, and since the quiet zone 35 is detected before and after that, the condition is satisfied. It is determined that the code part 36 has been detected as a proper code part having a predetermined pattern. Since the reference code pattern is detected at the same time, the counter 84 stops counting at this point.

On the other hand, when the condition is not satisfied or when 13 bars are not continuous, that is, when the code section 36 is an incomplete code, the photo sensor 57 is set to the black Bars 37a, 3
7b, the first quiet zone 35
Is judged to be wrong. After making this decision,
The microcomputer 80 checks again whether or not the first quiet zone 35 has been detected in the same procedure as described above from the time when the code section 36 becomes an incomplete code.

When the reference code pattern is detected, the microcomputer 80 sets the data disk 27
While the camera rotates one or more rotations, the photo sensor 57 is used to read information such as the film sensitivity and the number of images that can be captured in the code pattern 26, and then the motor 60 is stopped.

After stopping the motor 60, the microcomputer 80 reads the count value Ct of the counter 84, and if the count value Ct is larger than the first reference value, the photo sensor 57 switches the code section 36 Is determined to have started, and the photographic film 12 of the loaded film cartridge 10 is identified as unexposed.

When the microcomputer 80 determines that the photographic film 12 has not been exposed, the microcomputer 60 rotates the motor 60 in the normal direction and sends the
Is rotated in the film feeding direction. As a result, the photographic film 12 is sent out from the inside of the cartridge main body 11 through the film sending port 20, and is sent to the film winding chamber (not shown) behind the aperture of the camera 50 so that the photographic film can be taken. Is done.

After a part of the frame of the photo film 12 is photographed, a rewind button (not shown) is operated, or when the photographing of all frames is completed, the spool 13 is rotated in the film rewind direction. All the photo films 12 are stored in the cartridge body 11. Thereafter, control is performed so that the supple 13 stops at the exposed position Es. In addition, when the rewind button is operated without photographing, the spool 13 is stopped at the unexposed position Us. The stop position of the spool 13 can be determined based on the number of barcode signals and encode pulses.

On the other hand, if the count value Ct is equal to or less than the first reference value, it is determined that the photo sensor 57 has started detection from the quiet zone 35, and the photo film 12 of the loaded film cartridge 10 is not yet detected. Identify the usage state other than exposure. In this case, the spool 13 is rotated in the film rewind
s to stop. And a photo film 1 that cannot be taken
A warning indicating that No. 2 has been loaded is displayed, and the sequence ends.

After the photo film 12 is completely stored in the film cartridge body 11, the lock lever 54
When the lock of the bottom cover 53 is released by sliding the lock lever 54, the drive pin 74 is swung in conjunction with the slide operation of the lock lever 54, and the interlock lever 65 rotates clockwise in FIG. At this time, the opening / closing drive member 68 is rotated by the one end 65a pressing the connecting pin 71, so that the lid member 2
1 is pivoted to the closed position. Thereafter, the film cartridge 10 is taken out of the cartridge loading chamber 51.

FIG. 10 shows a photo corresponding to the code pattern 26 when the film cartridge 10 in various use states is loaded and the spool 13 is rotated in the film rewinding direction when the spool driver 55 is at the exposed position Ed. This shows the relative movement state of the sensor 57. Note that FIG. 10 illustrates a linearly converted code pattern corresponding to the vertical axis, and the movement curve indicated by the symbol Sd indicates the movement state of the spool driver 55.

When the spool driver 55 is at the exposed position Ed, for example, the exposed film cartridge 10
Is loaded, the spool driver 55 is loaded at the time of loading.
Are engaged with the key groove 28a, but the spool is locked until the lid member 21 rotates to the open position. Therefore, as indicated by the movement curve Es / Ed, the data disk 27 shows the second behavior when the rotation of the spool driver 55 starts. Then, while the spool gear 62 is rotating in the opening operation area, the data disk 27 shows the third behavior.

In the second and third behaviors, the data disk 27
Rotates while stopping or reversing, but even if the data disk 27 stops or reverses until the spool gear 62 passes through the opening operation area, the photo sensor 57 faces only the quiet zone 35 of the code pattern 26. Therefore, the bar code signal is maintained at "L level". Therefore, the number of transitions (count value Ct) does not increase during these second and third behaviors. Immediately after the film cartridge 10 is loaded, the distance between the photosensor 57 and the tip of the cord section 36 is 90 mm.
Since the angle is greater than or equal to degrees, while the quiet zone 35 is detected, the encode pulse is generated more than the number (second reference value) generated when the spool driver 55 is rotated by 90 degrees. The quiet zone 35 can be determined during the second and third behaviors.

The quiet zone 35 is the photo sensor 5
7, the spool disk 62 passes through the opening operation area. Therefore, before the photo sensor 57 starts detecting the code portion 36, the data disk 27 is stably rotated with the rotation of the supple driver 55. It turns. Therefore, the photo sensor 57 performs the detection of the code portion 36 and the subsequent detection of the quiet zone 35 while the data disk 27 is rotating stably.

As a result, as shown in FIG.
From the start of rotation of the spool driver 55, a reference code pattern in the order of the quiet zone 35, the code portion 36 read as a predetermined pattern, and the quiet zone 35 is detected. When the quiet zone 35 is detected for the second time, the count value Cp becomes the original number of transitions of the code pattern 26. Therefore, it is determined that the quiet zone 35 is located in the identification opening 42 at the time of loading. It is possible to identify that the photographic film 12 of the loaded film cartridge 10 is in a use state other than the unexposed state.

When the developed film cartridge 10 is loaded, the engagement projection 63a of the spool driver 55 does not engage with the key groove 28a at the time of loading. In addition, the spool is in the locked state until the lid member 21 rotates to the open position. Therefore, as shown by the movement curve Prs / Ed, the data disk 27 first shows the first behavior.
Then, while the spool gear 62 is rotating in the opening operation area,
The engagement protrusion 63a and the key groove 28a are engaged with each other, and the data disk 27 exhibits the third behavior in the open operation area.

Even in the first behavior and the third behavior, the photo sensor 57 faces only the quiet zone 35 during these behaviors as in the case of the second and third behaviors. The number of transitions does not increase. Immediately after the film cartridge 10 is loaded, the angle between the photo sensor 57 and the leading end of the cord portion 36 may be slightly smaller than 90 degrees, but during the first behavior, the supple driver 55 The rotation angle is larger than that of the data disk 27. Therefore, quiet zone 3
During detection of 5, an encode pulse equal to or greater than the second reference value is generated. Therefore, it can be determined that the quiet zone 35 has been detected during the first and third behaviors. Thereafter, the above-mentioned supple 13 is moved to the exposure position Es
Is the same as

Even when the partially exposed film cartridge 10 is loaded, the engagement projection 63a does not engage with the key groove 28a at the time of loading. In this case, as shown in the movement curve Ps / Ed, first, the data disk 2
7 shows the first behavior, and then shows the third behavior. This third
Even after the movement, the position of the key groove 28a is located at a position advanced from the engagement protrusion 63a, so that the friction between the driver shaft 62a and the spool 13 causes
Indicates the fourth behavior. However, since the photo sensor 57 starts detection from the rear end of the quiet zone 35 (the side closer to the first half of the cord section 36), the first to fourth photo sensors 57
Even if the behavior occurs, the user is in a state of facing the quiet zone 35 during these behaviors.

In most cases, before the photo sensor 57 starts detecting the code portion 36, the engagement protrusion 6
3a catches up with and engages with the key groove 28a, so that when the photo sensor 57 starts detecting the code portion 36,
The data disk 27 rotates stably. Therefore,
In the same manner as described above, the loaded photographic film 12 can be identified as a use state other than the unexposed state.

On the other hand, the unexposed film cartridge 10
Is loaded, the engagement projection 63a is also
Does not engage with the key groove 28a. In this case, as shown by the movement curve Us / Ed, the data disk 27 exhibits the first behavior, the third behavior, and the fourth behavior as in the case where the partially exposed film cartridge 10 is loaded. At the time of loading, since the photo sensor 57 faces the first half of the code section 36, when the first behavior occurs, the data disk 27
May remarkably increase the number of transitions detected by the photo sensor 57. In addition, during each movement, the rotation of the data disk 27 is not stable, so that the pulse width of the bar code signal is
It does not correspond to 37b, 38a, 38b. Therefore, the code part 36 detected first is determined as an incomplete code.

In this case, even if the first behavior and the third behavior
The behavior and the fourth behavior do not occur, and the count value Cp in each period in which the bar code signal is at “H level” and “L level” corresponds to each bar 37a, 37b, 38a, 38b. Also, the photo sensor 57
Since the detection is started in the middle of the above, the code section 36 is determined as an incomplete code. In addition, data disk 2
7 stops and even if one of the black bars 37a and 37b is erroneously determined as the quiet zone 35,
Is not detected as a predetermined pattern, it can be seen that this is an erroneous determination.

In most cases, before the photosensor 57 starts detecting the next quiet zone 35 after detecting the code portion 36 as an incomplete code, the engaging projection 63a is inserted into the key groove 28a. Since the data disk 27 is rotated stably by the engagement, the reference code pattern can be detected thereafter.

As a result, as shown in FIG.
After detecting an incomplete code, a reference code pattern is detected. Since the number of transitions in which an incomplete code is detected is counted more than the count value Cp when the film cartridge 10 in a use state other than unexposed is loaded, the code portion 36 is inserted into the identification opening 42 at the time of loading. Can be determined, and it can be determined that the photographic film 12 of the loaded film cartridge 10 has not been exposed.

FIG. 12 shows a photo corresponding to the code pattern 26 when the film cartridge 10 in various use states is loaded and the spool 13 is rotated in the film rewinding direction when the spool driver 55 is at the unexposed position Ud. This shows the relative movement state of the sensor 57. Note that also in FIG. 12, the code pattern 2
6 is converted to a straight line.

As shown by the movement curves Es / Ud and Ps / Ud, the spool driver 55 moves the unexposed position Ud
When a film cartridge 10 that has been exposed or partially exposed is loaded at
This is similar to the case where the developed film cartridge 10 is loaded when 5 is at the exposure position Ed. When the developed film cartridge 10 is loaded, the movement curve P
As shown by r / Ud, this is the same as when the developed film cartridge 10 is loaded when the spool driver 55 is at the exposure position Ed. In these cases, the non-exposed photographic film 12 is also determined by the count value Cp. Can be identified.

When the unexposed film cartridge 10 is loaded while the spool driver 55 is at the unexposed position Ud, the point where the second behavior occurs first as shown by the movement curve Us / Ud is the spool. When the driver 55 is at the exposure position Ed, the unexposed film cartridge 10
Is different from the case in which the reference code pattern is detected, but after detecting an incomplete code, the reference code pattern is detected.
When the data disk 27 shows the second behavior, the number of transitions increases during this behavior, or the count value C
Since p does not correspond to each of the bars 37a, 37b, 38a, and 38b, the count value Cp can also be used to identify that the unexposed photographic film 12 has been loaded.

In the above embodiment, the use state is identified based on the count number of the counter 84. However, after the reference code pattern is first detected, an incomplete state is detected before this reference code pattern. Code part 3 as code
The use state can also be identified by checking whether or not 6 has been detected. Also, the code part 3 of the predetermined pattern
In determining whether or not No. 6 has been detected, the pattern of the code portion 36 detected between the first and second quiet zones 35 indicates the code portion at the time of reading information such as film sensitivity and the number of shootable images. It may be added as a condition that the pattern matches 36 patterns.

[0097]

After loading the film cartridge,
While rotating the spool driver, the photoelectric detection by the photo sensor is started, and the white zone detected by the photo sensor is detected until the reference code pattern in the order of the quiet zone, the predetermined pattern code portion, and the quiet zone is first detected. Depending on the number of boundaries between the bar and the black bar, the white bar and the quiet zone, or whether a pattern other than the predetermined pattern is detected before detecting the reference code pattern, the identification opening is set when the film cartridge is loaded. Since it is determined which of the code section and the quiet zone has been exposed, even if the rotation of the data disk is unstable immediately after the rotation of the spool driver,
The usage state of the loaded film cartridge can be identified.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure for identifying a use state of a loaded film cartridge.

FIG. 2 is a perspective view showing an appearance of a film cartridge provided with a data disk.

FIG. 3 is an exploded perspective view showing a film cartridge configuration.

FIG. 4 is an explanatory diagram showing an example of a code pattern of a data disc.

FIG. 5 is an explanatory diagram showing a use state of a film cartridge and a positional relationship of a data disk.

FIG. 6 is a perspective view showing a cartridge loading chamber of the camera from the bottom side.

FIG. 7 is an exploded perspective view showing a configuration of a spool driving mechanism and a lid member opening / closing mechanism.

FIG. 8 is an explanatory diagram illustrating operations of a spool driving mechanism and a lid member opening / closing mechanism.

FIG. 9 is a block diagram illustrating an electrical configuration of the camera.

FIG. 10 is a graph showing a code pattern, a photo sensor, and a relative movement position when a spool driver is at an exposed position when a film cartridge is loaded.

FIG. 11 is an explanatory diagram showing a state of a code pattern detected by a photo sensor.

FIG. 12 is a graph showing a code pattern, a photo sensor, and a relative movement position when a spool driver is at an unexposed position when a film cartridge is loaded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Film cartridge 12 Photo film 13 Spool 21 Lid member 26 Code pattern 27 Data disk 35 Quiet zone 36 Code part 41 Identification opening 55 Spool driver 56 Opening / closing drive shaft 57 Photo sensor 80 Microcomputer 82 Transition detection circuit 83 Pulse width detection circuit 84 counter

Claims (5)

[Claims] 1. A code portion in which a plurality of low-reflection black bars and a plurality of high-reflection white bars are alternately arranged, and a quiet portion provided between a front end and a rear end of the code portion and indicating a break of the code portion. After the data disk having the zone formed therein is rotated together with the spool and the film is stored in the cartridge main body, the code portion and the quiet zone are formed through the identification opening formed in the cartridge main body according to the use state of the film. Either one is used for a selectively exposed film cartridge, and when the film cartridge is loaded, it is determined whether the code section or the quiet zone is exposed in the identification opening, and the loaded film cartridge is determined. A camera for identifying the use state of a film cartridge, which is arranged to face the identification opening of the loaded film cartridge. After the photosensor for photoelectrically detecting the code section and the quiet zone and the loading of the film cartridge, the spool driver engaged with the spool is turned, and the photoelectric detection by the photosensor is started. Based on the quiet zone, the code portion detected in the predetermined pattern, the white bar and the black bar detected by the photo sensor and the white bar and the quiet zone until the reference code pattern in the order of the quiet zone is first detected. A film cartridge comprising: a counter for counting the number of boundaries; and a discriminating means for discriminating which of a code portion and a quiet zone is exposed in the identification opening when the film cartridge is loaded according to the content of the counter. Use condition identification device. 2. A code portion in which a plurality of low-reflection black bars and a plurality of high-reflection white bars are alternately arranged, and a quiet portion provided between a front end and a rear end of the code portion to indicate a break of the code portion. After the data disk having the zone formed therein is rotated together with the spool and the film is stored in the cartridge main body, the code portion and the quiet zone are formed through the identification opening formed in the cartridge main body according to the use state of the film. Either one is used for a selectively exposed film cartridge, and when the film cartridge is loaded, it is determined whether the code section or the quiet zone is exposed in the identification opening, and the loaded film cartridge is determined. A camera for identifying the use state of a film cartridge, which is arranged to face the identification opening of the loaded film cartridge. After the photosensor for photoelectrically detecting the code section and the quiet zone and the loading of the film cartridge, the spool driver engaged with the spool is turned, and the photoelectric detection by the photosensor is started. Based on the first detection of the reference code pattern in the order of the quiet zone, the code portion detected in the predetermined pattern, and the quiet zone, a pattern other than the predetermined pattern is detected from the code portion before this reference code pattern. A use state discriminating device for discriminating whether a code section or a quiet zone is exposed in the discriminating opening when the film cartridge is loaded, depending on whether the film cartridge is loaded or not. 3. In the film cartridge, when the photographic film stored in the cartridge body is not exposed, the code portion is exposed from the identification opening, and when the photographic film is not unexposed, the quiet zone is exposed from the identification opening. When the code pattern exposed to the identification opening at the time of loading the film cartridge is determined to be the code portion, the determination unit stores the unexposed photographic film. 3. The film cartridge according to claim 1 or 2, wherein when it is determined that the photographing zone is in the quiet zone, the film cartridge stores a photographic film other than an unexposed one.
The use state identification device of the film cartridge described in the above. 4. The level of a photoelectric signal output when the photo sensor detects a black bar or a quiet zone, wherein the determining means has a measuring means for measuring a rotation angle of the supple driver. Is the first level,
When the level of the photoelectric signal output when detecting the white bar is set to the second level, based on the measurement by the measuring means and the level of the photoelectric signal output from the photosensor, While the photoelectric signal of one level is being generated, the spool driver is rotated by a predetermined angle or more, and then the second
The level and the first level photoelectric signal are alternately generated a plurality of times, and a predetermined predetermined value is set for the black bar and the white bar during each period in which the alternately generated photoelectric signal of each level is generated. It is determined that the reference code pattern has been detected by rotating the supple driver at an angle of?, And further rotating the spool driver at a predetermined angle or more while the first-level photoelectric signal is being generated thereafter. 4. The use state identifying apparatus for a film cartridge according to claim 1, wherein the use state is determined. 5. The apparatus according to claim 1, wherein the measuring means detects that the spool driver measures a rotation angle by counting an encode pulse generated each time the spool driver rotates by a predetermined angle. 5. The use state identification device for a film cartridge according to item 4.