JPH0815757A - Film rewinding device - Google Patents

Abstract

PURPOSE:To obtain a film rewinding device capable of loading surely a film in a cartridge and completing rewinding processing in the shortest time by detecting a projection provided on the leading edge of the film with a projection detecting part provided in the vicinity of the film feeding port, of the cartridge. CONSTITUTION:The cartridge 11 and a winding shaft 14 are arranged in the rear of a photographic lens 13 and on both sides across it, to wind the film 9 from the cartridge 11 on the winding shaft 14. In the cartridge 11, an R-fork 16 fitted into a spool shaft 15 is connected to a feeding motor 18 via a driving mechanism 17, to rewind the film 9. The projection detecting part 1 detecting the projection of the leading edge of the film 9 is arranged in close proximity to the port for feeding the film 9 of the cartridge 11 and even if the setting of a further short time as a specified time is attained, at least the exposed frame is completely rewound and the film 9 is loaded in the cartridge 11. Thus, a rewinding control time can be shortened.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Generally, a film of a cartridge mounted on a camera is rewound into the cartridge by a motor when photographing is completed. In this rewinding of the film, at the end of the rewinding, at least the exposed frames must be completely accommodated in the patrone, and if there is too much unrolled film, it becomes inconvenient to handle and when handling There is a risk of pulling out the rewound material. Therefore, in many cases, the film is completely contained in the cartridge, and various measures are taken.

For example, in Japanese Patent Publication No. 63-13522, a film detection switch is provided at a position away from the cartridge chamber of the camera body in the spool chamber direction, and when the film is rewound, the film detection switch causes the film failure to occur. A method is disclosed in which, after the presence is detected, the rewinding operation is continued for a time corresponding to the power supply voltage, the film is completely stored in the cartridge, and the rewinding operation is completed.

[0004]

However, in the rewinding stop device described in Japanese Patent Publication No. 63-13522, the film detection switch is provided at a position away from the cartridge chamber in the spool chamber direction. It is difficult to set the time from the detection of the absence of the film to the end of the rewinding, that is, the waiting time, and the time is set longer. Therefore, in reality, unnecessary time is added to the waiting time, and during that time, the winding operation is continued, and the energy consumption of the battery increases. or,
Since there is a relatively long waiting time from the detection of the absence of the film until the film is stored in the patrone, if the load suddenly becomes heavy on the way, the film is completely stored in the patrone. Before winding, it may be considered that the winding is completed. Therefore, an object of the present invention is to provide a film rewinding device that reliably stores a film in a cartridge and completes the rewinding process in the shortest time.

[0005]

In order to achieve the above object, the present invention is provided with a film feeding means for rewinding a film by a motor, a film feeding means provided in the vicinity of the cartridge chamber and in the film traveling path, and detects the leading end of the film. A leading edge detecting means for generating a characteristic signal, a timer means for counting a predetermined time in response to the characteristic signal, and a control for stopping the film feeding means when the counting of the predetermined time is completed. And a film rewinding device for the camera.

Further, a film feeding means for rewinding the film by a motor, an intermediate rewinding instruction means for rewinding the film on the way by the photographer's intention, and a film traveling path provided near the cartridge chamber and in the film traveling path, When the leading edge is detected, a leading edge detecting means for outputting a characteristic signal, a timer means for timing a predetermined time in response to the characteristic signal, and a status reading means for reading a film status displaying means provided on the cartridge are provided. In a film rewinding device of a camera equipped with the film, after the film front end is detected and timed for a predetermined time, film rewinding is stopped after the film state display means is brought into a predetermined state depending on whether or not the film is being rewound midway. A rewinding device is provided.

[0007]

The film rewinding device having the above-mentioned structure is
When rewinding the film, the notch provided at the tip of the film is detected by the notch detection part provided near the film feed opening of the cartridge, and the rewinding operation is performed after the lapse of a predetermined waiting time for an extremely short time. To stop.

Further, the film rewinding apparatus detects a notch provided at the leading end of the film at the time of film rewinding by a notch detecting section provided in the vicinity of the film feed opening of the patrone for an extremely short time. After the rewinding operation is stopped after the elapse of the predetermined waiting time, the usage state of the film before the film rewinding is displayed on the cartridge.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a schematic structure of a film rewinding device according to the present invention. This film rewinding device is provided in a camera and is shown in FIG.
A projection (tip projection) 10 provided at the tip of the film or a tip detection unit 1 for detecting the notch 46 shown in FIG. 21, a midway rewinding unit 2 for instructing midway rewinding of the film, A film feeding unit 3 for rewinding (winding) a film by a motor, a lens drive control unit 4 for driving a photographing lens of a camera, a shutter control unit 5, and a usage state such as the number of exposed films are detected. It is composed of a film use state detection unit 6, a film use state display unit 7 for displaying the film use state on the cartridge, and a CPU 8 for controlling these units.

FIG. 2A shows the structure of a film applied to the film rewinding device of the present invention. This film 9 is loaded into a cartridge 11 in a roll shape, and a tip projection 10 as shown in FIGS.
Is provided. The tip projection 10 is formed by pressing an object 12 having an acute angle, for example, from the back surface side of the film 9. The tip projection has a tip notch 4 as shown in FIG.
6 is acceptable.

FIG. 3 is a diagram characteristically showing the arrangement and configuration when the film rewinding device of the present invention is provided in a camera, and FIGS. 3 (a) and 22 (a) show diagonally. FIG. 3 is a perspective view seen from behind, and FIGS. 3B and 22B are top views seen from above.

In this structure, a cartridge (patrone chamber) 11 and a winding shaft (spool chamber) 14 are arranged behind the photographing lens 13 on both sides of the photographing lens 13, and the film 9 from the cartridge 11 is wound on the winding shaft. Wrap around 14. The cartridge 11 is an R fork 16 fitted into the spool shaft 15 of the cartridge 11.
Is connected to a feeding motor 18 via a drive mechanism 17 including a gear and the like, and the film 9 is rewound by the rotation of the motor 18. In addition, the winding shaft 14
Is also connected to the motor 18, and the film 9 can be wound by the rotation of the motor 18. The projection detecting section 1 or the notch detecting section 45 is arranged near the delivery port of the film 9 of the cartridge 11.

Next, the operation of the film rewinding apparatus described above will be described with reference to the flow chart of FIG. First, the exposure of the final frame is performed, and when the film reaches the end of the film, or when the forced rewind button (not shown) is operated, rewinding (rewind) is started (step S1). At that time, the open / closed state of the rear lid of the camera is checked (step S2), and if the rear lid is opened during rewinding (YES), the rewind operation is ended (step S5). However, when the rear lid is closed (NO),
The rewind operation is continued until the protrusion or notch at the film front is detected (step S3), and when the protrusion or notch is detected (YES), the rewind operation is ended after waiting for a predetermined time (step S4) ( Step S5).

In this film rewinding device, the projection detecting section 1 for detecting the projection at the front end of the film or the notch detecting section 45 for detecting the notch is arranged near the delivery port of the film 9 of the cartridge 11. Even if the predetermined time is set to a considerably short time, the film 9 is completely accommodated in the cartridge 11 at least for the exposed frames, and the rewind control time can be shortened.

Next, FIG. 6 shows, as a first embodiment, the structure of the projection detecting portion in the film rewinding device, which will be described. As shown in FIG. 5, the protrusion detection unit 1 includes a mask 1 that defines an imaging surface on an aperture (not shown) of the camera.
8 is provided at the end of the mask 18 of FIG.
A protrusion detection unit (switch) 1 having a structure as shown in (a) and (b) is provided. The position at which the protrusion detection unit 1 is provided is near the film feed port of the cartridge 11 and on the film traveling path, and FIG.
It is a position where the projection 10 at the front end of the film shown in FIG.

A specific structure of the protrusion detecting section 1 will be described with reference to FIG. The protrusion detection unit 1 is configured as a switch including a first contact piece 20 and a second contact piece 21. The first contact piece 20 has a convex portion 20a protruding from a window 19 opened in the mask 18, comes into contact with the protrusion 10, and has one end that bends, and the other end fixed to the mask 18. V in the section
A V-shaped contact portion is formed. The second contact piece 21 is
The contact piece has one end that comes into contact with the V-shaped contact portion due to bending, and the other end that is fixed to the mask 18. The other end of the first contact piece 20 is connected to the CPU 8 shown in FIG. 1 and the power supply Vcc, and the other end of the second contact piece 21 is grounded.

In the projection detecting section 1 thus constructed, as shown in FIG. 6A, in a normal state,
The switch is in the off state, and the power supply voltage Vc is applied to the CPU 8.
The voltage of c is applied and is at a high level. However, as shown in FIG. 6B, during the rewinding of the film, the projection 10 of the film 9 is changed to the projection 20 a of the first contact piece 20.
And the first contact piece 20 bends, and the V-shaped contact portion
By contacting one end of the contact piece 21, the switch is turned on, the power supply voltage Vcc applied to the CPU 8 flows to the ground side, and a low level signal is input to the CPU 8.

When the protrusion detecting section 1 detects a protrusion,
The voltage applied to the CPU 8 is changed from a normal high level to a low level. In this embodiment, detection is performed by setting the normal high level and changing the projection detection time to the low level. However, it may be normally low level and may be changed to the high level during detection.

As described above, a relatively long standby time is set after the leading edge of the film is detected, and the motor is rotated during that period to continue the rewinding operation. Since the projection provided at the tip of the film is detected by the projection detection section provided near the film feed opening of the patrone, it is only necessary to wait for a very short time, and the entire process from the rewind start to the end As a result, the rewinding time can be shortened, and it can be detected that the film is reliably stored in the cartridge. Further, since the waiting time after detecting the end of the rewinding is short, it is possible to reduce unnecessary energy consumption of the motor and reduce energy consumption.

Next, as a second embodiment, a description will be given of a configuration example in which the projection detecting portion in the above-mentioned first embodiment is arranged at another position. As shown in FIG. 7, the protrusion detection unit 1 is provided on the back side of the camera, for example, at the end of the pressure plate 23 provided on the back cover 22. As shown in FIG. 8, this protrusion detection unit 1 has a structure similar to that of FIG. 6 described above, and is provided in the vicinity of the film delivery port of the cartridge 11 as in FIG. 5 described above. It is on the film traveling path and is the position where the projection 10 at the leading end of the film shown in FIG.

In the second embodiment, the detection operation is the first
This is the same as the embodiment and the same effect can be obtained.
Next, as a third embodiment, a configuration example of the projection detecting portion of the film rewinding device of the present invention will be shown and described.

In the third embodiment, the film rewinding device has the same structure as that of FIG. 3A described above, and the projection detecting section 31 of the second embodiment is the projection detecting section shown in FIG. The same as in No. 1, in the vicinity of the film delivery port of the cartridge 11, on the film traveling path, and in FIG.
It is arranged at a position where the projection 10 at the front end of the film shown in FIG.

As shown in FIG. 9, an aperture (not shown) of the camera is provided with a mask 32 for defining an image pickup surface, and a projection detecting window 33 is opened at the above-mentioned position at the end of the mask 32. There is. In this embodiment, an optical sensor having a light projecting portion and a light receiving portion, for example, a photo reflector (PR) 34 is used as the protrusion detecting portion 31.

As shown in FIGS. 10 (a) and 10 (b), the protrusion detecting portion 31 is obliquely attached to the film surface with the opened window 33 interposed therebetween. That is, the protrusion detection unit 3
No. 1 is a film projected by the light projecting unit of the photo reflector when the film 9 is not on the projection detecting window 33, or when the flat surface of the film 9 is on the projection detecting window 33. It is arranged so that the light reflected by is not received by the light receiving portion.

With such a structure, the projection detection unit 31 outputs a low level signal when a normal film is not loaded or when the flat portion of the film 9 is on the projection detection window 33. ing. However, when the film 9 is rewound and the projection 10 of the film 9 passes over the projection detection window 33, the light projected by the projection section of the projection detection section 31 and reflected by the film is received by the light receiving section. Then, the projection detector 31 outputs a high level signal which is received and is received as shown in FIG.

In the third embodiment, a photo reflector is used in place of the mechanical switch of the projection detecting unit 1 in the first embodiment, and the projection provided on the tip of the film 9 is used. 10 is detected so that the same effect as that of the above-described first embodiment can be obtained. Further, a notch may be detected as shown in FIGS. 27 and 28. In this case, when the notch is detected, the photoreflector outputs a low level, usually a high level, but the same effect can be obtained.

Next, as a fourth embodiment, a description will be given of a configuration example in which the projection detecting portion in the above-mentioned third embodiment is arranged at another position. As shown in FIG. 11, the projection detection unit 31 is provided on the back side of the camera, for example, at the end of the pressure plate 35 provided on the back cover 34. The protrusion detection unit (photoreflector) 31 shown in FIG. 12 has the same structure as that of FIG. 10 described above, and is provided at a position near the film delivery port of the cartridge 11 as in FIG. 5 described above. , On the film traveling path, and at a position where the projection 10 at the leading end of the film shown in FIG. 3B passes.

In the fourth embodiment, the detection operation is the third.
This is the same as the embodiment and the same effect can be obtained.
In the fourth embodiment, the output signal of the projection detector (photoreflector) 31 is set to the high level to detect the projection 10 of the film 9, but it may be changed to the low level for detection. Good. Alternatively, the notch may be detected as shown in FIGS.

In the third and fourth embodiments, the protrusion detector is installed on the mask or the back of the camera, but it may be installed anywhere near the cartridge. Next in FIG.
As a fifth embodiment, a configuration example of a cartridge 41 attached to a film rewinding device will be described in Section 3 below.

The patrone 41 is provided with a plurality of marks on the upper surface or the lower surface thereof to show the usage state of the film. For example, the mark A is unused, the mark B is used halfway, and the mark C is The used mark D indicates that development processing has been completed. As shown in FIG. 13, a display member 43 is provided on a spool shaft 42 in the cartridge 41 so as to rotate integrally with the spool shaft 42, and a bar code disc 44 is also provided on the display unit. Similarly, it is provided so as to rotate integrally with the spool shaft 42. Further, in order to read the bar code on the bar code disc 44 on the upper surface or the lower surface of the cartridge 41,
A bar code reading window 45 is provided.

A camera equipped with such a cartridge 41 is constructed as shown in FIG. 3 described above, and further, a photo reflector (PR) for reading a bar code is provided on the upper surface or the lower surface of the cartridge chamber in which the cartridge is mounted. In this embodiment, PR is provided on the upper surface of the cartridge chamber.

The rewinding operation when such a cartridge 41 is mounted on the camera will be described with reference to the flowchart of FIG. First, the rewind is started when the last frame of the film is exposed or when the forced rewind button (not shown) is operated (step S10). Before entering the rewind control, the CPU in the camera and the E ² PROM etc. memorize whether the rewind was entered after the exposure of the last frame was performed or the rewind button was operated. To do.

After the rewind is started, the open / closed state of the rear lid is checked (step S11), and if the rear lid is opened during the rewind (YES), the rewind control is ended (step S17). However, if the rear lid is in the closed state (NO), the projection 1 at the tip of the film 9
Rewind operation is continued until 0 is detected (step S
12), when the protrusion 10 is detected by the configuration described in the above-described first to fourth embodiments (YES), a predetermined predetermined time necessary to surely store the leading end of the film in the cartridge 41. , The rewind operation is continued (step S13), and it is determined whether the rewind operation is a rewind by the end of the exposure of the final image frame or an intermediate rewind by the operation of the forced rewind button.
^{2 A} judgment is made based on the contents stored in the RPOM (step S14).

When it is determined in this determination that the exposure of the final frame is finished (NO), the spool shaft 42 is rotated so that the display member 43 indicates the mark C shown in FIG. 13 (a). It is set, the fact that it has been used is displayed (step S15), and the rewind is finished (step S17). However, when it is determined that the rewind is due to the midway rewind (YES), the display member 43 is
Is set by rotating the spool shaft 42 so as to point to the mark B (step S16), and the rewind is finished (step S17).

As for the control for driving the display member 43 to the position of the predetermined mark and stopping it, the bar code data is read and the rotation of the spool shaft 42 is detected to move the display member 43 to the position of the predetermined mark. Alternatively, the display member 43 may be driven to a predetermined mark position by detecting the rotation of the rewind shaft.

If the time for driving the display member 43 to the position of the predetermined mark is longer than the time for reliably storing the film 9 in the cartridge 41 after the projection is detected by the projection detecting section, , The step S1
If the step of waiting the predetermined time of 3 is omitted, the processing becomes faster.

As described above, the rewind control time can be shortened and the film use state can be displayed. Of course, the form of the film use state display is an example, and the present invention is not limited to this.

Next, a method of stopping the display member at a predetermined position by using the cartridge having the bar code display portion according to the fifth embodiment will be described. As shown in FIG. 15, the barcode disc and the display member are integrated. This bar code surrounds the display member 43 in a circular shape and serves as an area for information on ISO and the number of frames and an area for start data. Although not shown, a photo interrupter (hereinafter referred to as a motor PI) that generates a pulse in response to the rotation of the motor is provided. As shown in the timing chart of FIG. Is output.

This bar code is divided into 12 or 1
It has 2 bits of data, and the ISO and the number of frames are composed of 3 bits as shown in FIGS. 17 and 18, respectively. The start data is 4 bits black, then 1 bit.
White data is used, and 1 bit white is inserted between ISO and the number of frames. If black continues for 4 bits or more, it is determined to be start data. Specifically, since the motor PI has 4 pulses during 1 bit of the barcode, it is converted into barcode data every 4 pulses.

Considering the motor PI, the start data is the white portion of the four-pulse bar code after the motor PI continues blacking the bar code for 4 × 4 = 16 pulses or more, and every four pulses from that point. Convert data to. Considering variations and the like, the color (black or white) that matches three or more of the four pulses may be used as the barcode data.

Since the mounting position of the PR for detecting the bar code is determined by the camera, when the data of the bar code is known, it can be known where the display member 43 is pointing. Even during rewinding, it is possible to rewind while detecting the position of the display member 43 by simultaneously detecting the bar code and the signal of the motor PI.

FIG. 19 shows a timing chart near the end of rewinding. First, rewinding is performed while detecting the position of the display member 43 by detecting the bar code and the motor PI. After detecting the leading edge of the film, the motor is kept energized until the bar code signal to be stopped comes, and the film stop control is performed at the bar code signal (position α).

The protrusion detector 1 or the protrusion detector 31
Depending on the mounting position, the bar code may rotate once or more after the protrusion is detected. In FIG. 19, braking is performed for a certain period of time, a voltage is applied in the reverse rotation direction for a certain period of time, and braking is performed again, but speed feedback may be performed by the motor PI.

As shown in FIG. 20, instead of the motor PI, a pulse is generated in synchronism with the rotation of the roller that moves in synchronism with the movement of the film. You can In this case, the barcode data is not limited to ISO and the number of frames, and may be ISO data only.

Although the protrusion is detected in the fifth embodiment, the control may be performed by detecting the notch as in the third and fourth embodiments. Next, as a sixth embodiment, a configuration example in which a notch detecting portion is provided instead of the protrusion detecting portion in the above-described first embodiment will be described.

In the first embodiment, as shown in FIG. 21, a film provided with a notch 46 is used instead of the projection provided, and in the first embodiment, the projection 10 is cut instead of the projection 10. Since the notch 46 is detected and the other structure is similar to that of the first embodiment, the description thereof will be omitted. The notch detector 45 and the protrusion detector 1 have the same configuration, but the notch detector 45 changes the voltage applied to the CPU 8 from the normal high level to the low level when the notch at the leading end of the film is detected. Change. On the contrary, when the notch is detected from the normal low level, it may be changed to the high level. The other actions and effects are the same as those in the first embodiment.

Next, the projection detecting portion in the second embodiment described above as the seventh embodiment is replaced with a notch detecting portion, and other configurations and arrangements are the same as those in the second embodiment, and the film tip is attached. The notch provided is detected. The operation and effect of this embodiment are similar to those of the sixth embodiment.

According to the above embodiment of the present invention, the following configuration can be obtained. (1) It has a film feeding means for rewinding a film and a notch detecting means for detecting a notch provided in the leading end portion of the film, which is placed in the vicinity of the mouth of the patrone. In this case, the film rewinding control device for a camera, wherein after the notch detecting means detects the notch at the leading end of the film, the rewinding is ended after waiting for a predetermined time.

(2) The film feeding means for rewinding the film and the notch detecting means for detecting the notch provided at the leading end of the film, which is placed near the mouth of the cartridge, are provided. A film rewinding control device for a camera, characterized in that, when rewinding, when the notch detecting means detects a notch at the leading end of the film, the use state display of the film is changed to end the rewinding.

(3) In a film rewinding device in which a film having a characteristic notch portion at the tip portion can be used, a notch detecting means for detecting the notch portion is provided near the film outlet of the cartridge. A film rewinding device for a camera, wherein rewinding is stopped after a lapse of a predetermined time when the notch is detected.

(4) The camera according to (3), characterized in that the cartridge is provided with a status display means, and the status display means is changed at least at the end of the rewinding in accordance with the film exposure status. Film rewinding device.

[0052]

As described above in detail, the present invention can shorten the film rewinding time, prevent the user from feeling uncomfortable, and reduce the power consumption during the rewinding control. It will be possible. Therefore, according to the present invention, it is possible to provide a film rewinding device that reliably stores the film in the cartridge and completes the rewinding process in the shortest time.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a film rewinding device according to the present invention.

FIG. 2 is a diagram showing a characteristic structure of a cartridge and a film used in the present invention.

FIG. 3 is a diagram characteristically showing the arrangement and configuration when the film rewinding device of the present invention is provided in a camera.

FIG. 4 is a flow chart for explaining a film rewinding operation of the film rewinding device of the present invention.

FIG. 5 is a diagram for explaining the positional relationship between the protrusion detection unit and the film in the first embodiment.

FIG. 6 is a diagram showing a configuration of a protrusion detection unit in a film rewinding device as a first embodiment.

FIG. 7 is a diagram showing a configuration in which the protrusion detection unit in the first embodiment is arranged at another position as a second embodiment.

FIG. 8 is a diagram showing a configuration of a protrusion detection unit in a film rewinding device as a second embodiment.

FIG. 9 is a diagram showing a configuration of a protrusion detection unit that optically detects a protrusion in the film rewinding device of the third embodiment.

FIG. 10 is a diagram showing a configuration of a protrusion detection unit in the film rewinding device of the third embodiment.

FIG. 11 is a diagram showing a configuration in which the protrusion detection unit in the third embodiment is arranged at another position as a fourth embodiment.

FIG. 12 is a diagram showing a configuration of a protrusion detection unit in the film rewinding device of the fourth embodiment.

FIG. 13 is a diagram showing a configuration of a patrone attached to a film rewinding device as a fifth embodiment.

FIG. 14 is a flow chart for explaining the film rewinding operation of the film rewinding device of the fifth embodiment.

FIG. 15 is a diagram showing a configuration of a barcode disc and a display member.

FIG. 16 is a timing chart showing a relationship between a bar code signal and a motor PI signal.

FIG. 17 is a diagram showing the relationship between bar code data and ISO in the film rewinding device of the fifth embodiment.

FIG. 18 is a diagram showing the relationship between bar code data and the number of frames in the film rewinding device of the fifth embodiment.

FIG. 19 is a timing chart near the end of rewinding in the film rewinding device of the fifth example.

FIG. 20 is a diagram showing a configuration example in which, in place of the motor PI in the film rewinding device of the fifth embodiment, a pulse synchronized with rotation of a roller interlocked with the movement of the film is generated.

FIG. 21 is a diagram showing a characteristic structure of a cartridge and a film used in the present invention.

FIG. 22 is a diagram characteristically showing the arrangement and configuration when the film rewinding device of the present invention is provided in a camera.

FIG. 23 is a diagram for explaining the positional relationship between the notch detection unit and the film in the sixth embodiment.

FIG. 24 is a diagram showing a configuration of a notch detection unit in a film rewinding device as a sixth embodiment.

[FIG. 25] As a seventh embodiment according to the present invention, the notch detection unit in the sixth embodiment is replaced by another one.

FIG. 26 is a diagram showing the configuration of a notch detection unit in a film rewinding device as a seventh embodiment.

FIG. 27 is a diagram showing a configuration of a notch detection unit that optically detects a notch in the film rewinding device of the third embodiment.

FIG. 28 is a diagram showing a configuration of a notch detection unit in the film rewinding device of the third example.

FIG. 29 is a diagram showing a configuration in which the notch detection unit in the third embodiment is arranged at another position as the fourth embodiment.

FIG. 30 is a diagram showing the configuration of a notch detection unit in the film rewinding device of the fourth example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Protrusion detection part, 2 ... Halfway rewinding part, 3 ... Film feeding part, 4 ... Lens drive control part, 5 ... Shutter control part, 6
... film use state detection unit, 7 ... film use state display unit, 8 ... CPU, 9 ... film, 10 ... protrusion, 11 ... patrone, 13 ... shooting lens, 14 ... winding shaft, 15
... Spool shaft, 16 ... R fork, 17 ... Drive mechanism, 1
8 ... Motor.

Claims (3)

[Claims] 1. A film feeding means for rewinding a film by a motor, and a leading end portion detecting means which is provided in the vicinity of the cartridge chamber and in the film traveling path and which generates a characteristic signal when the leading end portion of the film is detected, A film winding for a camera, comprising: timer means for counting a predetermined time in response to a characteristic signal; and control means for stopping the film feeding means when the counting of the predetermined time ends. Return device. 2. A film winding film for a camera according to claim 1, wherein a film having a characteristic cutout at a front end thereof can be used, and the front end detection means detects the cutout. Return device. 3. A film feeding means for rewinding a film by a motor, a midway rewinding instruction means for rewinding the film on the way according to a photographer's intention, and a film feeding path provided in the vicinity of the cartridge chamber and in the film running path, A leading edge detecting means for outputting a characteristic signal when the leading edge of the film is detected, a timer means for timing a predetermined time in response to the characteristic signal, and a status reading means for reading a film status displaying means provided in the cartridge. In a film rewinding device for a camera, the film state display means is set to a predetermined state depending on whether or not the film is rewound midway after the film front end is detected and a predetermined time is measured. A film rewinding device for a camera, characterized in that the rewinding is stopped after the film is rewound.