JPH0553191A - Film feeding device of camera - Google Patents

Abstract

PURPOSE:To surely execute auto loading(AL) by executing rewind position control in the case an AL failure is detected by providing an AL failure detecting means. CONSTITUTION:In the case a film is not set properly, and film wind stops, a photointerrupter 5 detects a hole of the film, and in the case a prescribed number of frames cannot be counted even if a processing time elapses, a controller 1 transfers a signal to a film driving device 7, sets a signal (e) and a signal (f) to a low level and a high level, respectively and executes an electric conduction in the motor 8 rewind direction. As a result, the film starts to move in the rewind direction, a film movement detecting device 6 outputs a signal, and also, rewinds the film to a position in which the film is apt to be subjected to no-load feed most, and at that time, a film existence/non-existence switch 3 being a third detecting means is turned off. Thereafter, this time the controller 1 executes an electric conduction to the motor 8 in the film wind direction, resets temporarily a timer once, and thereafter, restarts the timer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeding device for idling a predetermined number of frames after loading a film.

[0002]

2. Description of the Related Art Conventionally, a code attached to a film cartridge or a switch which is turned on by inserting a film cartridge is read, and when the back cover is closed, the film is automatically fed in the winding direction ( Film feeding devices are known from now on). Further, based on this film feeding device, there is also known a film feeding device which automatically rewinds a film to a predetermined position when a predetermined amount of film cannot be fed within a predetermined time during an automatic idling operation. ..

Further, in Japanese Unexamined Patent Publication No. 02-082233, when automatic idling is completed and one or more images are not photographed, a manual rewind switch (hereinafter abbreviated as SW) is turned on to wind the film. A method has also been proposed in which, when the film is returned, the rewinding is completed while leaving the leading end portion of the film.

[0004]

However, in a camera having such an automatic feeding device, the photographer himself pulls out the film to a predetermined position and sets it in the film feeding device to perform the automatic feeding operation. Was there. As a result, if the film is pushed too far or the position where the film is set is misaligned, there will be a situation in which the film will be partially fed and stopped, or it will not be possible.

Further, when the film is fed midway and stopped, the film is taken out by the photographer himself, so that the film may be exposed or, in the worst case, the film may be broken. .. Further, in the case of manual rewinding, the film was rolled up, which was very inconvenient. Also in the film feeding device that rewinds the film leaving the leading edge, open the back cover and take out the film, adjust the length of the film by a predetermined amount, set the film again, and then close the back cover. It was extremely troublesome because it had to be. Furthermore, as described above, even if the film is set again and the film is automatically fed, the photographer pulls out the film and sets it.
In addition, it often resulted in a blank feed error.

In order to make these improvements, the present inventor has proposed in Japanese Patent Application No. 3-36161 that a photographer pulls out a film to a predetermined position, sets it, automatically feeds it, and winds it by a predetermined amount within a predetermined time. If it was not possible, we proposed that the film should be rewound once to the position where the idling operation is most likely to succeed, and the idling operation should be performed again.

However, there are many kinds of films at present, and as shown in FIG.
1, R2) and the length (l ₁ l ₂ ) of the leading edge of the film differ depending on the type of the film, and it is the current situation that it is difficult to determine the position where the idling operation is most likely to succeed as one fixed position.

An object of the present invention is to solve the above-mentioned problems of the conventional film auto-loading device and to provide a film feeding device capable of surely performing film auto-loading (abbreviated as AL). is there.

[0009]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention is directed to a case where a photographer pulls out a film to a predetermined position, sets it, and automatically winds it, but does not wind the film by a predetermined amount within a predetermined time. The present invention provides a film feeding device capable of stable idle feeding by rewinding the film to the position where the idling operation is most likely to be successful and then performing the automatic idling operation again.

In order to rewind to the position where the idling operation is most likely to be successful, the rewinding is stopped after a certain period of time after being detected by the third detecting means described later.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a control device that controls the sequence control and calculation of the camera. Reference numeral 2 denotes a DX detection SW attached to the film cartridge or a SW that is turned on when the film is loaded, and represents the first detection means of the present invention. Reference numeral 3 is a film presence / absence switch showing a third detecting means of the present invention which is turned on when the front end of the film pulled out from the cartridge comes to the position where the automatic idling is most easy. SW indicates a second detecting means of the present invention which is turned on and off in association with the opening and closing of the back lid. Reference numeral 5 is a photo interrupter that detects the movement of the film 14.

Reference numeral 6 is a film movement amount detecting device for detecting a signal of the photo interrupter and outputting a signal for one frame of the film 14 to the control device 1, which constitutes the fourth detecting means of the present invention together with the photo interrupter 5. To do. Reference numeral 7 is a film drive device that winds and rewinds the film by rotating the film feeding motor 8 in the forward or reverse direction. Reference numeral 9 is a display device for displaying the movement of the film, the film, etc., and for indicating an error in automatic jumping.

Reference numeral 10 is a known photographing device for photographing with a camera.

Reference numeral 20 is a film type detecting device for detecting a code indicating the type of film with the switches 20-1 to 20-4 and transmitting the code of the film type to the control device 1.

FIG. 2 shows an example of the arrangement of the detection device group showing the features of the present invention. In FIG. 2, members indicated by the same reference numerals as those in FIG. 1 indicate members having the same functions as those shown in FIG. 11 is a back cover, 12 is a camera body, and 9 is L
A CD display, 14 is a film, and 15 is a cartridge. SW2-1 to 2-4 showing the first detecting means of the present invention
When the cartridge 15 is loaded into the camera body, the GND pattern SW2-4 and the other code patterns SW2-1 to 2-3 become conductive,
The presence or absence of a patrone is detected. The second detecting means of the present invention is the projection 11-1 of the back lid 11 when the back lid 11 is closed.
Detects that the film is shielded by turning on SW3. The third detecting means of the present invention is the film 1
When the film is pulled out to the position of SW4 when 4 is pulled out, it is detected by being pushed by the film and turning on SW4. The fourth detecting means of the present invention is arranged so as to face the position of the film hole of the film 14, detects the light blocking state and the transmitting state by the photo interrupter 5 as the film moves, and counts this number. Thus, the moving amount of the film is detected.

Next, the operation of the above-mentioned camera will be described with reference to the flow chart shown in FIG. 3 and the timing chart shown in FIG. First, when a film is loaded, SW2, which is the first detection means, is turned on, and the signal a is transmitted to the control device 1 (# 101). When the film is set at a predetermined position in this state, SW4 is turned on. Then, when the back cover is closed, SW3, which is the second detecting means, is turned on, and the signal b is output (# 102). Then, the control device 1 sends a signal to the film drive device 7 to set the signal e to a high level to rotate the motor 8 in the forward direction to perform the winding operation (# 105). At the same time, the reset of a timer (not shown) in the control device 1 is released and the timer is started (# 106). At this time, if the film is properly set and is wound normally, the film shown in FIG.
As shown in FIG. 4, the photo interrupter 5 detects a hole in the film, and when the film movement detecting device 6 counts the number of one frame of the film, a signal d is output. The control circuit 1 counts the signal d, and within a predetermined time (# 108)
When a predetermined number of frames are counted (# 107), the motor is stopped (# 118), and the idle feed completion process (# 119) is performed.

FIG. 4B shows the case where the film is not properly set and the film winding is stopped even though the motor 8 is energized during the automatic idling. The photo interrupter 5 detects holes in the film,
When the film movement detecting device 6 counts the number of one frame, the signal d is output, but the signal d remains low because the film is stopped halfway.
Then, the control device 1 checks a predetermined time (# 10
8) If the predetermined number of frames cannot be counted within a predetermined time, a signal is transmitted to the film drive device 7, the signal e is set to the low level and the signal f is set to the high level, and the motor 8
Is energized in the rewinding direction (# 110). Then, the film starts moving in the rewinding direction, and the film movement detection device 6
Outputs a signal and rewinds the film to a position where the film is most easily fed, and at that time, the film presence / absence switch 3 which is the third detecting means is turned off (# 11).
1). After that, the control device 1 waits for a predetermined time (# 126), then energizes the motor 8 in the winding direction (# 120), resets the timer once, and then restarts the timer (# 121), similarly within a predetermined time (# 123), a predetermined number of frames (# 122)
If it cannot be wound up, stop the motor 8 (# 115).
Completes the automatic feed operation.

FIG. 5 is a flow chart showing another embodiment of the present invention. In the figure, those in which the 1's digit and the 10's digit are the same as those in FIG. 3 indicate the same control. First, when the film is pulled out and set in the camera, the first detection means transmits the detection signal to the control device 1 (# 201), and
When the back cover is closed, the second detection circuit also outputs a detection signal (# 202), the control device 1 sets the automatic idle feeding repeat count to 0 (# 203), and energizes the feeding motor in the winding direction ( (# 205), reset and start the thrusting timer for detecting automatic feed failure (# 20).
6). Then, the film starts moving in the winding direction, and the control device 1 judges whether or not a predetermined number of frames have been wound (# 207) within a predetermined time (# 208), and if the predetermined number of frames has been wound, the feeding motor 8 is stopped (# 218) and the automatic idling completion processing is performed (# 219). On the other hand, within a predetermined time (# 2
08) When the predetermined number of frames cannot be wound (# 207), the controller 1 energizes the feeding motor 8 in the rewinding direction to rewind the film (# 210). Then, the film presence / absence switch SW3 is turned off, and after the first timer time (# 216, # 217), the film is rewound (# 211). Then, the number of repetitions of the automatic jump feed is incremented by 1 and it is determined whether or not this count is a predetermined number (# 214). Repeat the idling operation. If the automatic jumping operation cannot be performed even after the specified number of times, it is highly possible that some mechanism is defective, so first rewind the film to a position where it can be easily taken out (# 225), the motor is stopped (# 215), the ALMiss latch which is a flag for prohibiting photographing is set up (# 216), and a warning display signal is issued to display a warning on the display device 9.

In step # 216, since the timer time is changed by CONT which is the number of times of the automatic idling operation, when the film is rewound, the film stop position changes little by little, and the idling fails due to the different kind of film. However, the probability of succeeding in the next blank feeding operation becomes high.

In the embodiment described with reference to FIG. 5, #
If the timer time selection part (# 216) of 216 is determined by a signal from the film type detection device 20, and by slightly shifting the position by the number of CONTs, the AL start position suitable for the film is set, Therefore, it becomes easy to succeed in the blank feeding.

FIG. 6 is a flow chart showing another embodiment of the present invention. This embodiment is basically the same as that shown in FIG. 5, but # 304, # 309, # 313.
13 points are new points by changing the duty ratio of the motor. In other words, in # 304, automatic idling is performed at a normal winding motor duty ratio, and if idling fails, in # 309, the duty ratio is set so that the film is slowly moved to accurately obtain the stop position of the film. Three
At 13, a duty ratio for which the energization time is longer than that of # 304 is set, and the ability of automatic idling is increased to perform automatic idling again.

[0023]

As described above, according to the apparatus of the present invention, when the automatic idling fails, the film is once rewound to the position where the idling operation is most successful, and the automatic idling operation is performed again. It is possible to achieve a stable automatic feed.

Further, the position at which the idling operation is most successful is
It is possible to achieve more stable automatic jump feeding by changing it little by little depending on the frequency of jump feeding failure or by changing the type of film.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a camera configured by applying the present invention.

FIG. 2 is a conceptual diagram showing an arrangement of detection devices included in the configuration of the present invention.

FIG. 3 is a flowchart showing the operation of the camera of FIG.

4 is a timing chart showing the operation of the camera of FIG.

FIG. 5 is a flowchart showing the operation of another embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of still another embodiment of the present invention.

FIG. 7 is a diagram for explaining the shape of a film.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Control device 2 ... DX code detection switch 3 ... Film presence / absence switch 4 ... Back lid opening / closing detection switch 5 ... Photointerrupter 6 ... Film movement amount detection device 7 ... Film drive device 8 ... Film feeding motor 9 ... Display device (LCD display body) 10 ... Shooting device 11 ... Back cover 12 ... Camera body 14 ... Film 15 ... Patrone

Claims (10)

[Claims] 1. A jump feed failure detecting means for detecting a failure of automatic jump feeding performed after a film is loaded in a camera, and rewinding the film when the jump feeding failure detecting means detects a jump feeding failure of the film. And a film rewinding position control means for changing the stop position of the leading end of the film according to the type of film. 2. A film skipping failure detection means for detecting a failure of film skipping after the film is loaded, and when the detection means detects at least one failure of automatic film skipping, depending on the number of failure detections. Film rewinding position control means for rewinding the film so as to change the stop position of the film front end during film rewinding,
A film feeding device for a camera, comprising: 3. A first detecting means for detecting that the film is loaded in the camera, a second detecting means for detecting that the film is shielded from light by a member for shielding the film, and the film is predetermined in advance. Third detection means for detecting that the film has been pulled out to the position, fourth detection means for detecting the movement of the film, and automatically in response to generation of a detection signal from the first and second detection means. A film feeding means for idling the film by a predetermined number of frames, and a timer means for generating an output after a lapse of a certain time from the time when the detection signal is generated from the third detecting means, When it is detected by the detection means that the film has not been fed by a predetermined number of frames within a predetermined time, rewinding is started and at the same time, the output of the third detection means is monitored, Wherein the output of the detecting means is no longer timer means performs the film rewinding operation after a time which is delayed by, and performs again the film idle feed, camera film transport device. 4. The idling operation is stopped when the reel is not rewound a prescribed length within a prescribed time even after re-idling a predetermined number of times.
Film feeder. 5. When the reel is not rewound by a predetermined length within a predetermined time even after re-feeding a predetermined number of times, the position detected by the third detecting means or the predetermined time is reached. 4. The film feeding apparatus according to claim 3, wherein the idling operation is stopped after the film is rewound only by the above. 6. The film feeding apparatus according to claim 4, further comprising means for generating a signal for displaying a warning after stopping the idling operation when the idling operation fails. 7. The film feeding apparatus according to claim 4, further comprising means for generating a signal for prohibiting a release operation after the idling operation is stopped when the idling operation fails. 8. The film feeding device according to claim 3, wherein when the idling operation fails, the feeding capacity is increased when the idling operation is performed again. 9. The film according to claim 3, wherein the third detection means generates a detection signal when the film is fed to a position most suitable for winding and idling the film. Feeding device. 10. A film type detection means for detecting the type of film loaded in the camera, wherein the timer time of the timer means is set based on the film type information output from the detection means. Claim 3
Film feeder.