JPH05249549A - Camera - Google Patents

Abstract

PURPOSE:To release a film from such a state that it is mechanically caught and to enable it to be wound up by repeatedly executing the rewinding action and the winding-up action of small amount plural times when the film is not moved while it is idly fed or wound up. CONSTITUTION:When the output of a film moving amount detection device 6 does not occur within a prescribed time after the winding-up action of the film is started, the film is rewound in the fixed time for eliminating the catch thereof by transmitting a signal to a film moving device 7 and energizing a motor 8 in a rewinding direction. When the prescribed catch eliminating action is not finished, the film is rewound again in the fixed time and such an action is repeatedly executed. When the actions of the prescribed frequency are finished, the motor 8 is energized in the winding-up direction by a controller 1 and a timer is started again after it is temporarily reset again. Then, when the prescribed frames of the film cannot be wound up in the prescribed time, the motor 8 is stopped and the automatic idle feeding action of the film is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a film feeding device, and more particularly to a camera with a simple loading mechanism.

[0002]

2. Description of the Related Art Conventionally, a code attached to a film patrone or a film patrone is turned on to read a switch, and when the back cover is closed, the film is automatically fed in the winding direction (hereinafter referred to as "automatic"). Cameras are known which have a film feed device (referred to as blank feed). There is also known a camera having a mechanism that issues a warning and prompts reloading when the film has not been fed even though it has been fed in the winding direction.

Furthermore, as a means for preventing the re-loading of a film due to an unsuccessful jump feeding and increasing the success rate of the automatic jump feeding,
If the film cannot be detected by skipping the film by the specified number of frames within the specified time, the film is automatically rewound to the loading position and then automatically skipped to the specified position. A camera having a mechanism for sending the light has also been proposed.

[0004]

However, when the film is stuck in the film feeding device in such a re-automatic idling operation, the current is continuously supplied to the motor or the conventional automatic feeding operation is performed. It was very inconvenient because the film was exposed because the photographer had to take it out again like a blank feed, and in the worst case, the film was cut.

Further, even in a film feeding device for rewinding the film leaving the leading end thereof, if the film is caught in the feeding device, the current continues to flow through the motor, If the camera user opens the back cover without noticing it, the film will be exposed unintentionally and the film will be forcibly removed. There were often things.

It is an object of the present invention to automatically perform a small number of rewinding and winding operations several times when the film does not move during idling or winding.
It is an object of the present invention to provide a camera which releases a film from a mechanically trapped state so that the film can be wound successfully.

[0007]

A camera according to the present invention comprises:
If the output of the film movement amount detecting means does not occur within a predetermined time after the film winding operation is started,
A camera provided with a control means for operating the film winding mechanism after the film rewinding mechanism and the film winding mechanism are alternately and repeatedly operated for a predetermined time after the film winding operation is stopped. Is.

Further, there is provided a film feeding device having a function of issuing a failure warning and notifying the photographer when the film winding and rewinding operations cannot be performed at all.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a schematic structural view mainly showing a film feeding device in a camera having the film feeding device of the present invention. In the figure, reference numeral 1 is a control device which controls the entire operation sequence of the camera, and which constitutes a film feeding control means, and 2 detects a DX code on the surface of the film cartridge, or a film is loaded. A switch that turns on due to the fact that it is turned on (hereinafter, the switch is referred to as SW), 3 is a switch that is turned on when the leading edge of the film pulled out from the patrone is at the position where it is most easy to feed by air, and 4 is the back of the camera. A switch for turning on / off in conjunction with opening and closing of the lid, 5 is a photo interrupter for detecting the movement of the film, 6 is a signal generated from the photo interrupter 5 according to the movement of the film, and a signal for one frame of film is sent to the control device 1. The film movement amount detecting device 7 for outputting is provided by energizing the film feeding motor 8 in the forward direction or the reverse direction. A film drive device for driving the film, a display device 9 for displaying the number of films and the like and an automatic jump feed error display, and a shooting device 10 having a built-in device such as exposure control and lens drive control for shooting. Device.

FIG. 4 shows an example of the arrangement of the detection device group in the above-mentioned camera. The same numbers as in FIG. 3 indicate the same devices as in FIG. Reference numeral 9 is a device for displaying an AL (auto loading) error or failure, 11 is a back cover of the camera, 12 is a camera body, 13 is a finder, 14 is a film, and 15 is a cartridge.

Reference numeral 2 denotes the switch described with reference to FIG. 1. The switch 2 is composed of four constituent elements 2-1 to 2-4.
When the cartridge 15 is loaded into the camera body, SW2-4 which is a GND pattern and S which is another code pattern.
The presence / absence of a cartridge is detected by establishing conduction with W2-1 to SW2-3. The switch 4 detects that the projection 11-1 of the back lid 11 turns on the SW4 when the back lid 11 is closed and the film is shielded from light. S
W3 is a switch for detecting the stop position of the film leader section by pushing on the film when the rear end of the film leader section is pulled out to the position of SW3 when the leader section of the film 14 is pulled out from the cartridge, and 6 is the above-mentioned. The device 6 is a detection device, and detects the light shielding state / transmission state of a pulse plate fixed to a roller or the like which is arranged at a position corresponding to the film hole of the film 14 and is rotated with the movement of the film by a photo interrupter. The amount of film movement is detected by counting this number.

Next, the electrical operation in the configuration shown in FIGS. 3 and 4 will be described with reference to the flow chart shown in FIG. 1 and the timing chart shown in FIG. First, when loaded in the camera, SW2 is turned on, and a signal is transmitted to the control device 1 (# 101). SW3 is turned on when the film leader is set to a predetermined position in this state. When the back lid is closed, SW4 is turned on and the signal b is output (# 10
2). Then, the control device 1 sends a signal to the film drive device 7 to bring the signal e to a high level, thereby causing the motor 8 to move.
To rotate in the forward direction to perform the winding operation (# 10
5). At the same time, the reset of the timer in the control device 1 is released to start the timer (# 106), and at the same time, the counter of the catch release operation is reset (# 104). At this time, when the film is properly set and wound normally, the photo interrupter 5 detects the movement of the film by the film movement detecting device 6 (pulses attached to the roller) by the roller or the like, as shown in FIG. The signal d is output by the plate. When the control circuit 1 counts the signal d and counts a predetermined number of frames within a predetermined time (# 108) (# 107), it stops the motor (# 11).
8) An idle feed completion process (# 119) is performed.

FIG. 2 shows a case in which the film winding is stopped while the motor is being energized and the current is being applied while the motor is being wound in the course of automatic idling without proper setting of the film.
It shows in (b). The photo interrupter 5 detects the movement of the film, and when the film movement detecting device 6 outputs the brightness of the pulse plate to the signal d, but the film stops midway, the signal d does not change. .. Then, the control device 1 checks a predetermined time (# 108), and if the predetermined number of frames cannot be counted even after the predetermined time is exceeded, 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. The level is set and the motor 8 is energized in the rewinding direction (# 110). Then, in order to remove the catch, it is rewound for a certain period of time (# 111), and this operation is counted (# 112). When the predetermined catch removal operation has not been completed, that is, when the counter has not reached the predetermined number of times (# 113), it is wound up again for a fixed time (# 124, # 125), and then the steps of # 111 and # 112 are performed. Repeat the operation. When the predetermined number of times is completed, the control device 1 then energizes the motor in the winding direction (# 12
1) After resetting the timer once again, the timer is restarted (# 121), and if the predetermined number of frames (# 122) is not wound within the predetermined time (# 123), the motor is stopped (# 115) automatically. Complete the idling operation.

FIG. 5 is a flow chart showing another embodiment of the present invention. In the figure, the units whose ten's place and one's place are the same as those in FIG. 1 indicate the same control. First of all, pull out the film tip from the Patrone and set it on the camera,
The detection means 3 transmits the detection signal to the control device 1 (# 20
1) And when the back cover is closed, the switch 4 also outputs a detection signal (# 202) to energize the feeding motor in the winding direction (# 205), reset the piercing timer for automatic idling error detection, and start. (# 206). Then, the film starts moving in the winding direction, and the control device 1 has wound a predetermined number of frames within a predetermined time (# 208) (# 20).
7) is judged, and if a predetermined number of frames are wound up, the feeding motor 8
Is stopped (# 218), and automatic idling completion processing is performed (# 219). When the predetermined number of frames cannot be wound up within the predetermined time (# 208) (# 207), the control device 1 energizes the feeding motor 8 in the rewinding direction to rewind the film (# 210). ). At this time, the tension timer for detecting rewinding error is reset and started (# 230).

If the film moves in the rewinding direction, the detecting means 6
Detects a signal and continues rewinding until no output is generated from the detection means 3. At this time, if the detecting means 6 does not output a signal, it is determined that the film is not moving, and the winding operation is performed again (# 233, # 214, # 225).
This is to detect the rewinding tension. And
When the output of the detection means 3 is turned off, the rewinding is stopped,
After that, a normal idling operation is performed.

FIG. 6 is a flow chart showing another embodiment of the present invention. Basically the same as in Fig. 5, but # 3
In 12, # 313, count the number of rewind tensions,
It differs from the embodiment of FIG. 5 in that a prohibition is applied when the number exceeds a predetermined number. That is, a feature of the present embodiment is that a warning is issued and a failure is displayed when the film does not move at all.

[0017]

As described above, in the camera of the present invention, when the automatic skipping is unsuccessful, regardless of the state of the film, the catching release operation is performed once, the film is rewound to the position where the skipping is successful, and the film is re-wound. The automatic jumping operation can be successful by performing the automatic jumping operation.

[Brief description of drawings]

FIG. 1 is a flowchart for explaining a function of a camera having a film feeding device according to a first embodiment of the present invention.

FIG. 2 is a timing chart of signals of respective parts in the camera having the configuration shown in FIGS. 3 and 4.

FIG. 3 is a schematic configuration diagram of a camera having a film feeding device of the present invention.

FIG. 4 is a diagram showing an arrangement of various detection means related to film feeding in the camera having the configuration of FIG.

FIG. 5 is a flowchart showing the function of a camera having a film feeding device according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing the functions of a camera having a film feeding device according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Control device 2, 3, 4 ... Switch (detection means) 5 ... Photointerrupter 6 ... Film movement detection device 7 ... Film drive device 8 ... Film feeding motor 9 ... Display device (for failure etc.) 10 ... Imaging device

Claims (4)

[Claims] 1. A film winding mechanism, a film rewinding mechanism, a drive source for driving the film winding mechanism and the film rewinding mechanism, and a film moving amount for detecting a film moving amount at the time of winding and rewinding the film. In a camera having a detection means and a film feeding means for controlling the drive source that takes in the output of the film movement amount detection means, the output of the film movement amount detection means is predetermined after the film winding operation is started. If it disappears in time,
A camera provided with a control means for operating the film winding mechanism after the film rewinding mechanism and the film winding mechanism are alternately and repeatedly operated for a predetermined time after the film winding operation is stopped. .. 2. A film winding mechanism, a film rewinding mechanism, a drive source for driving the film winding mechanism and the film rewinding mechanism, and a film moving amount for detecting a film moving amount at the time of winding and rewinding the film. In a camera having a detection means, a film leading edge detection means provided at a predetermined position of a film traveling path, and a film feeding means for controlling the drive source while taking in the output of the film movement amount detection means, If the output of the film movement amount detecting means does not occur within a predetermined time after the start of the winding operation of the film, the film rewinding mechanism and the film winding mechanism are alternately switched for a predetermined time after stopping the film winding operation. A control means for operating the film winding mechanism after being repeatedly operated is provided. Before Lum idle feeding operation resumes, characterized in that it has a function of stopping after the film leader is moved in a direction to rewind the film leader to the position detected by the film leading end detection means, a camera. 3. A film winding mechanism, a film rewinding mechanism, a drive source for driving the film winding mechanism and the film rewinding mechanism, and a film moving amount for detecting a film moving amount at the time of winding and rewinding the film. In a camera having a detection means and a film feed control means for controlling the drive source that takes in the output of the film movement amount detection means, the output of the film movement amount detection means after the film winding operation is started. When it does not occur within a predetermined time, the film winding operation is stopped, the film rewinding mechanism and the film winding mechanism are alternately repeated for a predetermined time, and then the film winding mechanism is operated. And the control means repeats the film rewinding mechanism and the film winding mechanism. After completion of the work, characterized in that a display means for displaying the film feed failure when the normal output to the film movement amount detecting means did not occur when the film winding operation is resumed, the camera. 4. The control means operates the film winding mechanism, and restarts the film winding operation when it is confirmed in the final film winding operation that a normal output is generated from the film movement detecting means. The camera according to claim 1, 2 or 3, characterized in that.