JPH1184493A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the rotations of a spool shaft and a data disk fitted on the spool shaft caused by loosening of a film, when a film cartridge once loaded in a camera is reloaded, in the camera corresponding to an APS (novel photographic system). SOLUTION: In the case of displaying the state of a film 100, after the film is rewound in a film cartridge 1, a key shaft 30 is rotated in the pay-out direction of the film and the state of the film is displayed by the rotation in the pay-out direction of the film. Further, a switch S2 for detecting the fact that the top end 101 of the film is protruded out of the cartridge 1 is provided. When the top end 101 of the film is protruded out, the film 100 is rewound in the cartridge 1 to try the display of the state of the film once more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel photographic system (hereinafter referred to as "APS"), in which a film is completely loaded into a film cartridge when the film cartridge is not loaded in a camera. The present invention relates to a camera using a film cartridge of a stored type.

[0002]

2. Description of the Related Art In an APS, when a film cartridge is not loaded in a camera, the film is completely stored in the film cartridge. Therefore, the film state (unused, partially photographed, photographed, developed) Is displayed, a film status display is provided. Hereinafter, the film state display in the APS compatible film cartridge will be described.

As shown in FIG. 13 (a) or (c), A
On the first surface 10 orthogonal to the axis (spool axis) 22 of the spool 26 of the PS-compatible film cartridge 1, windows 11 to 11 of a predetermined shape indicating a film state (unused, partially photographed, photographed and developed) are shown. 14, a white marker 15 attached to the spool shaft 22 rotates inside, and the stop position indicates the film state. With this display function, the user can know the state of the film 100 inside the film cartridge 1 before loading the film cartridge 1 into a camera or the like.

[0004] As shown in FIG. 13 (b) or (d), a bar code 21 a representing the type and sensitivity of the film is formed on a second surface 20 orthogonal to the spool shaft 22 of the film cartridge 1. , A data disk 21 mounted on a spool shaft 22 is provided. After the film cartridge 1 is loaded into a camera or the like, the film 100
By loading the information of the bar code 21a on the data disc 21 when loading the data, the film sensitivity and the like are automatically set.

When the film cartridge 1 is not used (the inner film is not exposed), as shown in FIG.
The position of the spool shaft 22 is adjusted so as to face a predetermined window 11 indicating unused. Marker 15
And the data disk 21 are both fixed to a spool shaft 22. In other words, the position of the barcode 21a on the data disk 21 also indirectly indicates the film state. Therefore, in a conventional APS-compatible camera, for example, FIG.
Using two sensors (not shown) such as a photo reflector provided to face the two notches 24 and 25 on the second surface 20 of the film cartridge 1 shown in FIG. 3B or 3D, respectively. By monitoring the barcode 21a on the data disk 21 and comparing changes in output signals from the two sensors, the state of the film 100 (any of unused, partially photographed, photographed, and developed) Is determined.

Some APS-compatible cameras use the above-described film state determination function to remove the film cartridge 1 from the camera with one film taken halfway, or to take the film cartridge halfway through. A camera capable of reloading the film cartridge 1 (a camera with a function of replacing the film cartridge midway) has also been commercialized.

[0007]

In the conventional APS compatible camera, after the rewinding of the film 100 is completed, the spool shaft 22 is rotated in the rewinding direction to display the film state, and the light shielding door 16 is closed to close the spool shaft. 22 rotation is locked. Therefore, inside the film cartridge 1, the film 100 is locked while being wound on the spool 26.

When the film cartridge 1 that has been photographed halfway, photographed or developed is reloaded into the camera, and the light-shielding door 16 is opened, the lock of the spool shaft 22 is released, and the film 100 is wound loose due to the elasticity of the film 100. I will try again. At this time, the spool 26 rotates, and the data disk 21 fixed to the spool shaft 22 also rotates.
The film status display (windows 11 to 14) is
Are arranged in the order of developed, photographed, partially photographed, and unused in the direction of loosening. Therefore, when the film cartridge 1 that has been photographed or partially photographed is loaded in the camera, the spool shaft 22 and the data disk 21 attached thereto rotate due to the loosening of the film 100, and the film state determination device of the camera is loaded. The film state of the film cartridge 1 may be erroneously determined to be halfway taken or unused. As a result, in the worst case, there is a problem that a frame that has already been photographed is exposed again, resulting in a double copy.

Further, the light shielding door 1 of the film cartridge 1
When the film cartridge 6 is opened, a mechanical load may be applied to the spool shaft 22 or the like so that the film 100 does not loosen. Spool shaft 2
It is difficult to secure a space for providing a mechanism for applying a load to 2. Further, when a load is applied to the spool shaft 22, the feeding speed of the film 100 is not stabilized, and information recorded in the magnetic recording area of the film 100 may be affected.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and is intended for a case where a film cartridge photographed by the camera of the present invention is reloaded into another camera (including the camera of the present invention). It is another object of the present invention to provide a camera for setting a film state of a film cartridge so that another camera does not erroneously determine the film state.

[0011]

In order to achieve the above object, a camera according to the present invention comprises an engaging member engageable with a spool shaft of a film cartridge having a film state displaying function, and a bidirectional engaging member. Drive means for rotationally driving, data reading means for reading data on a data disk attached to the spool shaft of the film cartridge, and driving the engaging member in the film rewinding direction to completely move the film into the film cartridge. After the film has been rewound, a drive control means for driving the engaging member in the film feeding direction and stopping the spool shaft at a predetermined position according to the state of the film is provided.

The engaging member is slidable, for example, in the direction of the spool axis of the film cartridge, and is constantly urged toward the film cartridge by a spring. When the engagement member rotates and the projection of the engagement member and the key groove of the spool shaft of the film cartridge face each other, the engagement member and the spool shaft are engaged by the urging force of the spring. The driving unit includes, for example, a motor, a speed reduction mechanism, an encoder for detecting a rotation direction and a rotation angle of the engagement member, and the like, and rotates the spool of the film cartridge in a predetermined direction via the engagement member and the spool shaft. Let it. The data reading unit is, for example, an optical sensor or the like configured of a light emitting element and a light receiving element,
A change in the reflectance of a bar code or the like on the data disk attached to the spool shaft of the film cartridge is detected, and the signal is converted into a predetermined signal such as a voltage level and output. The reference point on the spool shaft is, for example, a white marker attached to the spool shaft, and stops at a predetermined position corresponding to the film state, for example, a position facing a window provided at a predetermined position of the film cartridge. Thus, it is possible to display the state of the film. In addition, by fixing both the data disk and the marker to the spool shaft, it is possible to indirectly display the film state of data such as a bar code on the data disk. The drive control means includes, for example, a CPU and a memory, and calculates the reference rotation position of the engagement member or the spool shaft of the film cartridge from an output signal from the data reading means, and controls the start and stop of the motor of the drive means. I do.

In the present invention, since the setting of the film state is performed by rotating the spool shaft in the film feeding direction, the film in the film cartridge in which the film state is set is in a loose winding state. Therefore, when the film cartridge photographed by this camera is reloaded into another camera (including the camera of the present invention), even if the light shielding door of the film cartridge is opened, the spool does not rotate due to the loosening of the film, and the spool does not rotate. The data disk mounted on the shaft also does not rotate. As a result, the other camera does not erroneously determine the film state of the loaded film cartridge, and no double copying occurs even if a film cartridge that has been photographed or partially photographed is reloaded.

In the above construction, the apparatus further comprises a film leading end detecting means for detecting that the leading end of the film has been fed out from the film cartridge, and while the engaging member is being driven in the film feeding direction, the film leading end detecting means is provided. When the leading end of the film is detected by the means, the engaging member is re-driven in the film rewinding direction, and after the entire film is rewound into the film cartridge again, the engaging member is driven again in the film unwinding direction, and the spool is rotated. The reference point on the axis may be stopped at a predetermined position according to the state of the film.

In the camera of the present invention, the setting of the film state display is performed by rotating the spool of the film cartridge in the direction in which the film is fed. Therefore, the leading end of the film rarely protrudes from the film cart lodge. Therefore, a film leading end detecting means including a sensor for detecting the protrusion of the leading end of the film is provided, and when it is detected that the leading end of the film is out of the film cartridge, the engaging member is rotated in the film rewind direction, Is once rewound into the film cartridge, and then the engagement member is rotated again in the film feeding direction to reset the film state. As a result, when the film cartridge is removed from the camera of the present invention, the film is always in a loosened state.

Alternatively, the above structure further comprises a film leading end detecting means for detecting that the leading end of the film has been fed out of the film cartridge, and wherein the driving means is for driving the engaging member in the film feeding direction. When the leading edge of the film is detected by the leading edge detecting means, the engaging member is re-driven in the film rewinding direction, and after the entire film is rewound into the film cartridge again, the engaging member is further driven in the film rewinding direction. And
The reference point on the spool shaft may be stopped at a predetermined position according to the state of the film.

Also in this case, when the leading end of the film protrudes from the film cartridge, the setting of the film state is redone. However, the engaging member is rotated in the film rewinding direction, and the film state is reset by extension of the film rewinding. Therefore, although it is inevitable that the film is locked in the wound state, the time required for setting the film state is shortened.

According to another aspect of the present invention, there is provided an engaging member engageable with a spool shaft of a film cartridge having a function of displaying a film state, driving means for rotating the engaging member in two directions, and a film cartridge. Data reading means for reading data on a data disk attached to a spool shaft of the spool member, and timer means for counting a time from the start of driving the engaging member in the film feeding direction, and a film of the engaging member. If the output signal from the data reading means does not change within a predetermined count time by the timer means after the drive in the rewind direction is started, it is determined that the film cartridge is not loaded, and It is configured to stop driving.

Generally, in a conventional APS compatible camera, a cartridge detection switch for detecting that a film cartridge is loaded in a film cartridge chamber, and a lid switch for detecting that a lid of the film cartridge chamber of the camera is closed. When both switches are turned on, the engaging member is driven in the film feeding direction to read data from the data disc of the film cartridge. However, according to the above configuration, when the film cartridge is not loaded, even if the rotation of the engaging member is started at the stage when the switch for detecting that the lid of the film cartridge chamber is closed is turned on, the data reading means does not work. Does not change. Therefore, if the output of the data reading means does not change within a predetermined time (for example, 5 seconds), it can be determined that the film cartridge is not loaded. As a result, a switch for detecting that a film cartridge is loaded in the film cartridge chamber can be omitted, and the configuration of the camera can be simplified.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Next, a first embodiment of the camera of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a configuration of a camera according to a first embodiment of the present invention as viewed from a photographer side. FIG. 2 is a view showing a key shaft as an engaging member provided on the camera side and a spool shaft of a film cartridge. It is sectional drawing which shows the state which has engaged.

In FIG. 1, the optical axis L of the lens (not shown) is located at the center of the camera 200, and a rectangular exposure window 201 corresponding to the exposed area of the film 100 is centered on the optical axis L. Is formed. The film cartridge loading chamber 202 in which the film cartridge 1 is loaded is
In the figure, it is arranged on the right hand side of the exposure window 201. At the lower part of the film cartridge chamber 202, a lid 213 is provided so as to be openable and closable. Further, the camera side spool 203 for winding the film 100 is provided with the exposure window 20 in the figure.
1 is located on the left hand. Above and below the exposure window 201,
Upper rail 2 for guiding the feeding of film 100
04 and a lower rail 205 are formed.

At the bottom of the camera 200, a hoisting mechanism 206 for driving the camera-side spool 203 is provided. At the top of the film cartridge chamber 202, there is provided a key shaft 30 which engages with a shaft (spool shaft) 22 of a spool 26 inside the film cartridge 1.
And a key shaft drive mechanism 207 for rewinding the film after the photographing is completed. A portion 206a of the hoisting mechanism 206 is provided at substantially the same level as the key shaft driving mechanism 207 via the shaft 212. Also,
In the vicinity of the key shaft drive mechanism 207, a light-shielding door opening / closing mechanism 214 for opening and closing the light-shielding door of the loaded film cartridge 1 is provided. Key shaft driving mechanism 207, part 206a of hoisting mechanism 206, and light shielding door opening / closing mechanism 214
A switching mechanism 208 is provided in the vicinity of (for example, above).

A rotating shaft 210 of a film feed motor 209 (hereinafter, referred to as a motor 209) is connected to a switching mechanism 208 via a speed reduction mechanism (not shown). Also,
An encoder 21 is provided near the rotation shaft 210 of the motor 209.
1 is provided, and the encoder 211 is provided with a motor 209.
The rotation direction and the number of rotations of the rotation shaft 210 of the control circuit 22
Output to 0. The switching mechanism 208 includes a cam, a planetary gear, and the like (not shown), and changes the cam position by rotating the motor 209 in a first direction via a one-way clutch.
Change the combination of planetary gears etc. according to the cam position,
The driving force generated by the rotation of the motor 209 in the second direction is applied to the hoisting mechanism 206, the key shaft driving mechanism 207, and the light shielding door opening / closing mechanism 2.
14 etc. selectively. Further, it also controls the normal rotation and the reverse rotation of the hoisting mechanism 206, the key shaft driving mechanism 207, and the light shielding door opening / closing mechanism 214. Actually, the switching mechanism 208 is driven by controlling the rotation direction and the number of rotations of the motor 209, and the driving force of the motor 209 is selectively changed according to the position of the cam of the switching mechanism 208. It is transmitted to one of the mechanism 207 and the light shielding door opening / closing mechanism 214, and the rotation direction can also be switched. However, in the following description, it is abbreviated simply as "control the switching mechanism 208."

In the drawing, near the left end of the exposure window 201 and near the upper rail 204, a perforation provided on the film 100 is detected, and the exposed area of the film 100 is stopped at a position facing the exposure window 201. A first optical sensor S1 is provided for causing the first optical sensor S1 to operate. Exposure window 2
On the right side of 01 and near the upper rail 204, a second optical sensor S2 for detecting that the leading end 101 of the film 100 has protruded from the film cartridge 1 is provided. Further, near the left end of the exposure window 201 and near the lower rail 205, a magnetic head M1 for recording and reproducing magnetic information on a magnetic recording area of the film 100 is provided.

In FIG. 2, the key shaft drive mechanism 207
A key shaft 30 slidable in the direction of the axis L of the spool shaft 22 of the film cartridge 1; a compression coil spring 31 for urging the key shaft 30 toward the film cartridge 1;
0 and a compression coil spring 31, a cylindrical guide member 32, a gear 33 engaged with the guide member 32 and transmitting a rotational force to the key shaft 30, and a plurality of switches provided on the upper surface of the gear 33. The switch pieces 34 and 35 are provided so as to face the pieces 33 and 35 and the gear 33, and the switch pieces 34 and 35 read the barcode 21a on the data disc 21 of the film cartridge 1 on the printed board 36 sliding on the electrode pattern. A sensor 40 and C sensor 41 such as a photoreflector composed of a light emitting element and a light receiving element, CP
And a data discriminating circuit 50 for processing position signals of the key shaft 30 generated by the switch pieces 34 and 35 and the printed circuit board 36 and signals from the A sensor 40 and the C sensor 41. I have. Note that the data discriminating circuit 50 is a control circuit 220 of the camera body 200.
May be configured as a part of

Key shaft 30, guide member 32 and gear 33
Is relatively fixed. The switch pieces 34 and 35 provided on the gear 33 and the electrode pattern of the printed circuit board 36 constitute a position detecting device (encoder). In particular, a first key position switch is constituted by the switch piece 34 and the electrode pattern on the printed board 36, and a second key position switch is constituted by the switch piece 35 and the electrode pattern on the printed board 36. The data discriminating circuit 50 includes the switch piece 3
The absolute position of the marker 15 attached to the spool shaft 22 engaged with the key shaft 30 can be known from the electric signal generated by the sliding of the 4 and 35 on the electrode pattern. A gear is formed at the outermost periphery of the gear 33, and the motor 2
09 and transmits the driving force of the motor 209 to the key shaft 30.

Next, the pattern of the bar code 21a on the data disk 21 and the windows 11 to 11 showing the state of each film provided on the first surface 10 (see FIG. 13A or 13C) of the film cartridge 1. The relationship with 14 will be described with reference to FIG. The windows 11 to 14 on the first surface 10 of the film cartridge 1 are provided on the housing of the film cartridge 1, and their positions are fixed. The positions of the sensors 40 and 41 are also fixed. On the other hand, the barcode 21 a on the data disk 21 rotates with the rotation of the key shaft 30. FIG.
(A) is obtained by linearly developing a barcode 21a on a data disk 21 formed in an annular shape. In the figure, the position A is the position of the marker 15 attached to the spool shaft 22.
Indicates a portion of the barcode 21a facing the sensor 40, for example, at a time when the barcode 21a is located at a position facing the window 11 representing an unused state. Similarly, a position B indicates a portion of the barcode 21a facing the sensor 40 at a time when the marker 15 is located at a position facing the window 13 indicating the photographed state.
In the first embodiment, the film state of the loaded film cartridge is set to 2
The same processing is performed when a film cartridge that has been photographed halfway is loaded, and the same processing is performed as when a film cartridge that has been photographed is loaded.
A case in which 5 is located at a position facing the windows 12 and 14 indicating that photographing and development have been completed up to the middle of the film cartridge is omitted.

For example, as shown in FIG. 13A or 13C, it is assumed that the marker 15 and the keyway 23 of the spool shaft 22 are in the same direction. When an unused film cartridge is loaded in the camera, the key shaft 30 and the spool shaft 22 are engaged by rotating the key of the key shaft 30 on the camera side from the initial position to the phase corresponding to the point A. . Similarly, when a photographed film cartridge is loaded in the camera, the reference point of the key shaft 30 rotates from the initial position to the phase corresponding to the point B, so that the key shaft 30 and the spool shaft 22 are engaged. .

FIG. 3B shows the change of the output signal of the first key position switch constituted by the switch piece 34 provided on the gear 33 and the electrode pattern of the printed circuit board 36. The data discriminating circuit 50 detects that the voltage of the output signal from the first key position switch is at a low level (LO), so that the marker 15 attached to the spool shaft 22 is moved to the first position of the film cartridge 1.
It is determined that it is located at a position facing the window 11 provided on the surface 10 and representing an unused state. FIG. 3C shows a change in the output signal of the second key position switch constituted by the switch piece 35 provided on the gear 33 and the electrode pattern of the printed circuit board 36. Second
By detecting that the voltage of the output signal from the key position switch is at a low level (LO), the marker 15 attached to the spool shaft 22 changes the photographed state provided on the first surface 10 of the film cartridge 1. It is determined that it is at a position facing the window 13 represented.

FIG. 4 shows the electrode pattern on the printed circuit board 36.
Shown in In the figure, the switch piece 34 forming the first key position switch slides on the inner track 361, and the switch piece 35 forming the second key position switch slides on the outer track 362. The hatched area is the conduction area, and the unhatched area 361a
And 362a are non-conductive areas. The non-conductive areas 361a and 362a in the tracks 361 and 362 are formed so as to correspond to the point A representing the unused state and the point B representing the photographed state in FIG.

The loaded film cartridge 1
Is already taken by a conventional camera,
The film 100 may be loosened by releasing the lock of the spool shaft 22, and the spool shaft 22 may rotate due to the elasticity of the film 100. At that time, the data disk 21 attached to the spool shaft 22 also rotates. However, in the first embodiment, the film cartridge chamber lid 2
For example, the output signal from the sensors 40 and 41 is repeatedly detected and compared with the previous output signal every 1 ms, for example, from the time when the C sensor 13 is closed. The number of changes in the output signal of the film cartridge 1 is counted, and the loaded film cartridge 1 is counted.
, The shift of the initial position of the data disk 21 due to the rotation of the spool shaft 22 can be offset. As a result, the film state of the loaded film cartridge 1 can be accurately determined irrespective of the displacement of the initial position of the data disk 21.

Next, FIG. 5 shows a schematic configuration of the control unit according to the first embodiment of the present invention. In FIG. 5, a control circuit 220 includes a memory, a timer circuit, and the like in addition to the CPU, and can also serve as the data determination circuit 50 described above. The control circuit 220 includes, in addition to the power supply circuit 221, an LCD display device 222 for displaying in-focus display and use of a flash, an AF circuit 223 for adjusting the focus of the lens, measuring the brightness of the subject, and setting the aperture value of the lens. A that determines shutter speed and shutter speed
E circuit 224, motor driver 225 for controlling switching mechanism 208 by controlling the rotation direction and number of rotations of motor 209, A sensor 4 for reading bar code 21a on data disk 21 of film cartridge 1
0 and C sensors 41, a first optical sensor S1 for detecting film perforation for controlling film feeding for each frame, and a second optical sensor S1 for detecting that the leading end of the film has protruded from the film cartridge 1. The optical sensor S2 and the like are connected. Further, the control circuit 22
0 is a camera main switch, a film chamber lid switch for detecting a film change, and the first and second switches described above.
A key position switch, a release switch for detecting that the shutter release button is pressed, a light-shielding door switch in conjunction with opening and closing of the light-shielding door, and a rewind switch for rewinding the film after taking a picture halfway are connected. . In the drawings, the switch is abbreviated as SW.

Next, in the first embodiment of the present invention,
FIGS. 6 to 9 show flowcharts of the initial loading from when the film cartridge 1 is loaded into the camera to when the first area to be exposed (first frame) of the film 100 is stopped at the position facing the exposure window 201. .

When the film chamber lid switch is turned on (#
1) The control circuit 220 is provided in the film cartridge
The A sensor 40 and the C sensor 41 (abbreviated as D / D sensor) provided on the ceiling and the like of No. 2 are turned on (# 3),
The output signal from the D / D sensor is temporarily stored in the memory (# 5). At this stage, the presence or absence of the film cartridge 1 is unknown, and since the light blocking door 16 of the film cartridge 1 is not opened, the spool shaft 22 cannot rotate. Therefore, the key shaft drive mechanism 207 is not driven, and the key shaft 30 is not rotating.

Next, the control circuit 220 controls the switching mechanism 208
To control the rotational force of the motor 209 to control the light-shielding door opening / closing mechanism 2
14 to start the opening operation of the light shielding door 16 (#
7). Further, the control circuit 220 waits until the light shielding door switch is turned on (# 9), stops the rotation of the motor 209, and ends the light shielding door opening operation (# 11). When the film cartridge 1 is loaded in the film cartridge chamber 202, the light-shielding door 16 of the film cartridge 1 is opened, the lock of the spool shaft 22 is released, and the spool shaft 22 becomes rotatable.

When the light shielding door opening operation is completed, the control circuit 22
0 controls the switching mechanism 208 to transmit the torque of the motor 209 to the key shaft driving mechanism 207 to rotate (forward) the key shaft 30 in the film rewinding direction (# 13). In parallel with this, the control circuit 220 starts timing of the first timer (# 15) and sets the first counter n = 0 (# 17),
The output signals of the D / D sensors 40 and 41 are read (# 1
9).

Next, the control circuit 220 compares the outputs of the D / D sensors 40 and 41 read in # 19 with the outputs of the D / D sensors 40 and 41 stored in # 5 (# 2).
1). When there is no change in the outputs of the D / D sensors 40 and 41, the control circuit 220 determines that the time of the first timer has reached a predetermined time,
For example, it is determined whether five seconds have elapsed (# 23). If the first timer has not passed the predetermined time, the control circuit 2
20 counts the second timer (# 25), and returns to # 19 to read the outputs of the next D / D sensors 40 and 41.
If the count of the first timer has passed a predetermined time, that is, if neither of the D / D sensors 40 and 41 has been able to detect a signal for a certain period of time after starting the normal rotation of the key shaft 30, the film cartridge chamber 202 Is not loaded with a film cartridge. Therefore, the control circuit 220 determines that the film cartridge is not loaded (#
27) The brake is applied to the motor 209 to stop the rotation of the key shaft 30 (# 29). At the same time, the control circuit 220 displays a message such as "film not loaded" on the LCD display device 222 (# 31), terminates the initial loading operation, and waits for the next opening of the film cartridge chamber cover 213. Wait (# 33).

On the other hand, if the outputs of the D / D sensors 40 and 41 change in # 21, it is clear that the film cartridge 1 is loaded in the film cartridge chamber 202, and the control circuit 220 It is determined whether the change is due to the A sensor 40 or the C sensor 41 (# 35). If the change in the outputs of the D / D sensors 40 and 41 is due to the A sensor 40, the control circuit 220 updates the output of the D / D sensor stored in # 5 (# 37), and counts n of the counter. By one (# 3
9), the second timer measures the time (# 25), and # 19
To read the output of the next D / D sensors 40 and 41.

In # 35, the D / D sensors 40 and 4
When the change in the output of No. 1 is caused by the C sensor, the control circuit 220 turns off the D / D sensors 40 and 41 (# 4).
1), the reading of the barcode data on the data disk 21 ends, and it is determined whether the count value n of the counter is larger than a predetermined value (for example, 6) (# 4).
3).

If B> 6 in # 43, the control circuit 2
Reference numeral 20 indicates that the loaded film cartridge 1 is unused (the internal film 100 is not exposed) (# 45), and the leading end 101 of the film 100 is wound around the camera-side spool 203, and the first exposed area ( An operation of setting the (first frame) to a position facing the exposure window 201 is performed. First, the key shaft 30 is normally rotated in the film rewind direction (# 46), and the data of the barcode 21a on the data disk 21 is read by the D / D sensors 40 and 41 (# 47). According to the bar code data, the control circuit 220
Obtains information such as the type of film loaded, the sensitivity, and the number of shootable images. When the reading of the barcode data is completed, the control circuit 220 controls the switching mechanism 208 to reverse the key shaft 30 in the film feeding direction (# 4).
8).

With the reversal of the key shaft 30, the leading end 101 of the film 100 inside the film cartridge 1 passes through the opened light-shielding door 16 and passes through the film cartridge 1
Is fed out. The control circuit 220 monitors the output signal from the first optical sensor S1 and determines whether or not the perforation representing the leading end of the first frame to be captured provided on the film 100 has passed through the first optical sensor S1. (# 49).

When it is detected that the perforation of the first frame has passed through the first optical sensor S1, the control circuit 220
Brakes the film feed motor 209 and stops the rotation of the key shaft 30 (# 51). In parallel with this,
The control circuit 220 displays characters and graphics indicating the completion of the initial loading on the LCD display device 222 (# 53), terminates the initial loading operation, and then waits until the release switch linked to the shutter release button is turned on. (# 55).

On the other hand, if n> 6 is not satisfied in # 43, that is, if n ≦ 6, the control circuit 220
It is determined that the loaded film cartridge 1 has been photographed (the internal film 100 has been exposed for at least one frame) (# 57), and the switching mechanism 208 is controlled to
0 is rotated forward in the film rewinding direction (# 59). With the forward rotation of the key shaft 30, the portion of the film 100 that has been wound around the camera-side spool 203 passes through the open light-shielding door 16 of the film cartridge 1,
The film is rewound into the film cartridge 1. The control circuit 220 monitors the output signal from the second optical sensor S2 and determines whether or not the leading end 101 of the film 100 has passed through the second optical sensor S2 (# 61).

When detecting that the leading end 101 of the film 100 has passed through the second optical sensor S2, the control circuit 220 applies a brake to the film feed motor 209 and sets the key shaft 3
0 is stopped (# 63). Here, since the entire film 100 is rewound into the film cartridge 1, the control circuit 220 controls the switching mechanism 208 to
The key shaft 30 is reversed in the film feeding direction (# 6
5) The spool shaft 22 engaged with the key shaft 30 is rotated in the film feeding direction, and the display of the film state of the film cartridge 1 is started.

In this case, the loaded film cartridge 1 has been partially photographed, photographed, or developed. However, in the camera of the first embodiment, it is necessary to replace the film cartridge halfway and reload it. Since it is not assumed, the marker 15 attached to the spool shaft 22 of the film cartridge 1 is stopped at a position (the position B in FIG. 3A) opposite to the window 13 indicating that photographing has been completed. Therefore, the control circuit 220 selects the second key position switch composed of the switch piece 35 attached to the gear 33 and the electrode pattern on the printed circuit board 36 (# 66), and outputs the (second) key position switch. The signal is 2
It waits for a change from high level (HI) to low level (LO) (# 67) (see FIG. 3 (c)). That is,
The output signal of the key position switch is high level twice (HI)
To the low level (LO), the key shaft 30 always rotates one or more turns.

When the output signal of the second key position switch goes low, the spool shaft 2 of the film cartridge 1
Since the marker 15 attached to the camera 2 is located at a position facing the window 13 indicating that photographing has been completed, the control circuit 220 applies a brake to the motor 209 and stops the rotation of the key shaft 30 (# 69).

When the film state is set by the rotation in the film feeding direction, the leading end 101 of the film 100 may protrude from the film cartridge 1 very rarely. Therefore, the control circuit 220
Monitors the output signal of the second optical sensor S2,
Then, it is determined whether or not the leading end 101 of the “00” has passed the position of the second optical sensor S2, that is, whether or not the leading end 101 has protruded from the film cartridge 1 (# 71). When the leading end 101 of the film 100 is out of the film cartridge, the control circuit 220 controls the switching mechanism 208 to rotate the rewinding form 30 forward in the film rewinding direction (# 73). The rewinding into the film cartridge 1 is started. The control circuit 220 determines whether or not the leading end 101 of the film 100 has returned to the inside of the film cartridge 1 from the change in the output signal of the second optical switch S2 (# 75). Film 1
When the leading end 101 of the "00" returns to the inside of the film cartridge 1, the control circuit 220 applies a brake to the motor 209 to stop the rotation of the key shaft 30 (# 77). Then, returning to step # 65, the film state setting is performed again.

In step # 71, the leading end 1 of the film 100
When it is determined that 01 does not protrude from the film cartridge 1, the film 100 is normally rewound to the film cartridge 1 and the film state setting is normally performed. Therefore, the control circuit 220 switches the switching mechanism 2
08, the torque of the motor 209 is transmitted to the light shielding door opening / closing mechanism 214, and the light shielding door 16 of the film cartridge 1 is controlled.
Is started (# 79). The control circuit 220 waits for the light shielding door switch to be turned off (# 81), applies a brake to the motor 209, and ends the light shielding door closing operation (# 81).
83). In parallel with this, "film unusable" is displayed on the LCD display device 222 (# 85), and the initial loading operation is completed.
Is opened (# 87). Thereby, the camera 2
All the initial loading operations performed after the film cartridge chamber lid 213 of the 00 is closed are completed.

Next, FIG. 10 to FIG. 1 are flow charts of the operation when the film is shot to the last frame and the rewind switch is turned on while the film cartridge 1 is loaded in the film cartridge chamber 202.
It is shown in FIG.

When the film rewind switch is turned on when the last frame of the film is photographed or when the film is photographed up to the middle frame, the control circuit 220 controls the switching mechanism 208 so that the rotational force of the motor 209 is controlled by the key shaft 30. To rotate the key shaft 30 forward in the film rewind direction (#
101), rewinding of the film 100 is started. Next, the control circuit 220 turns on the first optical switch S1,
The detection of the perforation of the film 100 is started (# 103). In parallel with this, the count value m of the film counter, which indicates the number of shot frames stored in the memory, is called (# 105).

The control circuit 220 determines whether or not the perforation of the film 100 has passed through the first optical switch S1 (# 107). Each time one perforation passes, the count value m of the film counter is decremented by one. Subtraction is performed (# 108). Further, the control circuit 220 determines whether the count value of the film counter is m = 0, that is, whether or not all the photographed exposed areas on the film 100 have been rewound (# 109). And film 1
It is determined whether or not the tip 101 of 00 has passed through the second optical switch S2 (# 111). The tip 10 of the film 100
When detecting that 1 has passed through the second optical switch S2,
Since the entire film 100 has been rewound into the film cartridge 1, the control circuit 220
To stop the rotation of the key shaft 30 (#
113). Here, since the entire film 100 has been rewound into the film cartridge 1, the control circuit 220 controls the switching mechanism 208 to reverse the key shaft 30 in the film unwinding direction (# 115). 30
Is rotated in the film feeding direction, and the display of the film state of the film cartridge 1 is started.

At this stage, the film state of the film cartridge 1 is usually either photographed or partially photographed. However, in rare cases, an unused film cartridge may be loaded and taken out without taking a single frame. In the latter case, even if this film cartridge is loaded into a camera (including other cameras) again, there is no fear of double copying. Therefore, the control circuit 220 determines that none of the loaded films has been shot (film 100
Is fed from the film cartridge 1,
It is determined whether or not “unused” is expressed instead of “unused” (# 117). Specifically, it is determined whether or not the count value m = 0 of the film counter read in # 105.

If the film has been shot halfway or has been shot, the second key position switch is selected (# 119) because it is the same as when a halfway shot or shot film cartridge is loaded during the initial loading. ). On the other hand, when the film has not been photographed, the marker 15 attached to the spool shaft 22 of the film cartridge 1 is stopped at a position (position A in FIG. 3A) opposite to the window 11 indicating that the film is not used. First
The key position switch is selected (# 121). When either the first or second key position switch is selected, the subsequent flow is the same as steps # 67 to # 87 shown in FIG.

As described above, according to the first embodiment,
When removing the film cartridge from the camera, regardless of the film state (unphotographed, partially photographed and photographed), the film state of the film cartridge 1 is displayed by rotating the spool shaft 22 in the film feeding direction. Film 100 in one
Is not wound around the spool 26. Therefore, even if the film cartridge is reloaded into the camera and the light-shielding door 16 of the film cartridge 1 is opened, the rotation of the spool 12 due to the loosening of the film 100 is extremely small. The reading error of the data of the barcode 21a hardly occurs. As a result, it is almost unlikely that an unphotographed film cartridge is erroneously determined to have been photographed, or a photographed film cartridge is erroneously determined to be unused.

Second Embodiment In the first embodiment, when the film state is displayed after the film 100 is rewound into the film cartridge 1, the leading end 101 of the film 100 is set to the film cartridge 1. When the film runs off the film, the key shaft 30 is rotated in the film rewinding direction, the film 100 is rewound into the film cartridge 1 again, and the key shaft 30 is rotated in the film unwinding direction to redisplay the film state. doing. However, it is not always appropriate to repeat the film state setting as many times as possible, assuming that such a situation hardly occurs, because the flow of film rewinding becomes complicated. In particular, in a low-priced camera, it is required to simplify the control circuit 220 and the control program.

Therefore, as shown in FIG. 12, the second optical switch S2 is moved to the leading end 101 of the film 100 at # 75.
Is detected, the flow returns to # 67 without changing the rotation direction of the key shaft 30, and the spool shaft 2
2 may be rotated in the film rewinding direction to frequently display the film state. With this configuration, the film status display of the redo film 10
Since the leading end 101 of the “0” does not protrude from the film cartridge 1, there is no need to display the film state for the third time.

In the first and second embodiments,
Although the case where the film state of the loaded film cartridge is discriminated as two types, that is, unused or other, has been described, the present invention is not limited to this. Unused, partially photographed, photographed, and The present invention can also be applied to a case where the film state is determined for all the developed cases. In particular, in the case of a camera with the function of changing the film cartridge midway, if the film cartridge is taken out of the middle of one film, the film cartridge is taken out of the camera, and the film cartridge is reloaded into the camera, the data disk is opened even if the light blocking door of the film cartridge is opened. Does not rotate, and the film state of the loaded film cartridge is not erroneously determined. Therefore, the photographing can be continued from the frame next to the already photographed frame, and the midway exchange function of the film cartridge can be effectively used.

[0058]

As described above, according to the camera of the present invention, the engagement member engageable with the spool shaft of the film cartridge having the film state display function, and the drive for rotating the engagement member bidirectionally. Means for reading data on a data disk attached to a spool shaft of the film cartridge, and after driving the engaging member in the film rewinding direction to completely rewind the film inside the film cartridge. And a drive control means for driving the engagement member in the film feeding direction and stopping the reference point on the spool shaft at a predetermined position according to the film state. Can be rotated in the film unwinding direction. It can be in loosening state winding Lum. Therefore, when the film cartridge photographed by this camera is reloaded into another camera (including the camera of the present invention), even if the light shielding door of the film cartridge is opened,
The rotation of the spool due to the loosening of the film does not occur,
The data disk attached to the spool shaft also does not rotate. As a result, the other cameras do not erroneously determine the film state of the loaded film cartridge, and no double copying occurs even if a film cartridge that has been photographed or has been photographed halfway is reloaded.

Further, there is further provided a film leading end detecting means for detecting that the leading end of the film has been fed out from the film cartridge, and while the engaging member is being driven in the film feeding direction, the film leading end detecting means is provided. When the leading end of the film is detected, the engaging member is re-driven in the film rewinding direction, and the entire film is rewound into the film cartridge again. The reference point is stopped at a predetermined position according to the state of the film, so that even if the leading end of the film protrudes from the film cart lodge, the leading end of the film protrudes from the film cartridge by the film leading end detecting means. Can be detected, and the engaging member is moved in the film rewind direction. After the film is once rewound into the film cartridge, the engaging member is rotated again in the film feeding direction to reset the film state. be able to.

Alternatively, the apparatus further comprises a film leading end detecting means for detecting that the leading end of the film has been fed out from the film cartridge, and while the engaging member is being driven in the film feeding direction, the film leading end detecting means is provided. When the leading end of the film is detected, the engaging member is re-driven in the film rewinding direction, and the entire film is again rewound into the film cartridge. By configuring the upper reference point to stop at a predetermined position corresponding to the film state, the setting of the film state can be performed again when the leading end of the film protrudes from the film cartridge. In addition, since the engaging member is rotated in the rewinding direction of the film and the film state is reset by extending the film rewinding, it is inevitable that the film is locked when the film is wound, but the film state display is not possible. Is simplified, and the time required for setting the film state can be shortened.

According to another camera of the present invention, an engaging member engageable with a spool shaft of a film cartridge having a film state displaying function, a driving means for rotating the engaging member bidirectionally, A data reading means for reading data on a data disk attached to a spool shaft of the film cartridge; and a timer means for counting a time from the start of driving of the engaging member in the film feeding direction. If the output signal from the data reading means does not change within a predetermined count time by the timer means after the start of the driving in the film rewind direction, it is determined that the film cartridge is not loaded, and When the film cartridge is not loaded, it is configured to stop driving the members. Even if the rotation of the engagement member is started when the switch for detecting that the lid of the cartridge chamber is closed is turned on, the output of the data reading means does not change, and the data is read within a predetermined time (for example, 5 seconds). If the output of the means does not change, it can be determined that the film cartridge is not loaded.
As a result, a switch for detecting that a film cartridge is loaded in the film cartridge chamber can be omitted, and the configuration of the camera can be simplified.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention as viewed from a photographer side.

FIG. 2 is a cross-sectional view showing a state in which a key shaft of the camera and a spool shaft of a film cartridge are engaged in the camera shown in FIG.

FIG. 3A is a data disk 2 formed in an annular shape;
FIG. 1B is a diagram in which the barcode 21a on 1 is developed linearly, (b)
FIG. 3C is a diagram showing a change in an output signal of a first key position switch constituted by a switch piece 34 provided on a gear 33 and an electrode pattern of a printed circuit board 36, and FIG.
FIG. 7 is a diagram illustrating a change in an output signal of a second key position switch configured by a switch piece provided on a third and an electrode pattern of a printed circuit board.

FIG. 4 is a view showing an electrode pattern on a printed circuit board 36;

FIG. 5 is a diagram illustrating a schematic configuration of a control unit according to the first embodiment.

FIG. 6 is a diagram showing a flowchart of initial loading in the first embodiment.

FIG. 7 is a diagram illustrating a continuation of the flowchart of initial loading in the first embodiment.

FIG. 8 is a diagram illustrating a continuation of the flowchart of the initial loading in the first embodiment.

FIG. 9 is a diagram illustrating a continuation of the flowchart of the initial loading in the first embodiment.

FIG. 10 is a diagram illustrating a flowchart of an operation in a case where a film is shot up to the last frame and a case where a rewind switch is turned on in the first embodiment.

FIG. 11 is a diagram illustrating a continuation of the flowchart of the operation in the case where the film is shot up to the last frame and the case where the rewind switch is turned on in the first embodiment.

FIG. 12 is a diagram showing a flowchart in the case where the film state display is redone in the second embodiment of the present invention.

13A and 13B are diagrams showing a configuration of an APS-compatible film cartridge, wherein FIG. 13A shows a first surface of the film cartridge when not used, FIG. 13B shows a second surface when not used,
(C) shows the first surface when the image has been taken, and (d) shows the second surface when the image has been taken.

[Explanation of symbols]

 1: film cartridge 10: first surface 11: window indicating unused 12: window indicating completed shooting 13: window indicating completed shooting 14: window indicating developed 15: marker 16: light shielding door 20: second Surface 21: Data disk 21a: Bar code 22: Spool shaft 23: Key groove 24: Notch portion 25: Notch portion 26: Spool 30: Key shaft 33: Gear 34: Switch piece 35: Switch piece 36: Printed circuit board 50: Data Discrimination circuit 100: Film 101: Film tip 209: Motor 220: Control circuit S1: First optical switch S2: Second optical switch

Claims (4)

[Claims] An engaging member engageable with a spool shaft of a film cartridge having a film state display function, driving means for rotating the engaging member in two directions, and being attached to the spool shaft of the film cartridge. Data reading means for reading the data on the data disc, and after driving the engaging member in the film rewinding direction and rewinding the entire film into the film cartridge, driving the engaging member in the film unwinding direction, A camera having drive control means for stopping the spool shaft at a predetermined position according to a film state. 2. The apparatus according to claim 1, further comprising: a film leading end detecting means for detecting that the leading end of the film has been fed out of the film cartridge, wherein the driving means moves the engaging member in the film feeding direction. When the leading end of the film is detected by the detecting means, the engaging member is re-driven in the film rewinding direction, and after the entire film is rewound into the film cartridge again, the engaging member is driven in the film unwinding direction again. 2. The camera according to claim 1, wherein a reference point on the spool shaft is stopped at a predetermined position according to a film state. 3. The apparatus according to claim 1, further comprising a film leading end detecting means for detecting that the leading end of the film has been fed out of the film cartridge, wherein the engaging member is driven in the film feeding direction. When the leading end of the film is detected by the detecting means, the engaging member is re-driven in the film rewinding direction, and after the entire film is rewound into the film cartridge again, the engaging member is further moved in the film rewinding direction. 2. The camera according to claim 1, wherein the camera is driven to stop a reference point on the spool shaft at a predetermined position according to a film state. 4. An engaging member engageable with a spool shaft of a film cartridge having a film state display function, driving means for rotating the engaging member in two directions, and attached to the spool shaft of the film cartridge. Data reading means for reading the data on the data disk, and timer means for counting the time from the start of driving the engagement member in the film feeding direction, in the film rewind direction of the engagement member. If the output signal from the data reading means has not changed within a predetermined count time by the timer means since the start of the driving of the engagement means, it is determined that the film cartridge is not loaded, and the driving of the engagement member is performed. Camera.