JPH043038A - Film feeder - Google Patents

Abstract

PURPOSE:To allow the sure resetting of a film take-in member to an initial position by providing a guide member in the position corresponding to the spacing between the body of a spool chamber and a pressure plate. CONSTITUTION:The guide member 17 for guiding the film take-in member 4 to the spacing between the body 1 of the spool chamber 20b and the pressure plate 14 is provided in the position corresponding to this spacing. The film take-in member 4 is, therefore, smoothly guided between the body 1 and the pressure plate 14 and is returned to the initial position even as the guide member 17 is provided, even if the other end part of the film take-in member 4, i.e. the part where a projecting part is formed, is curled at the time of rewinding. The film feeder provided with the film take-in member 4 which intrudes smoothly into the spacing between the body 1 and the pressure plate 14 at the time of rewinding is obtd. in this way.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a film feeding device used in cameras and the like. When a cartridge is loaded into the cartridge chamber, the perforations of this film engage with the protrusions of the film attracting member, and the film is pulled together with the film attracting member into the main body. It passes between the and the pressure plate and is wound onto the spool.
The present invention relates to a film feeding device in which the protruding portion of the film loading member returns to the vicinity of the cartridge chamber when the film is rewound.

[Prior Art] Various so-called autoloading mechanisms have been proposed to simplify the film loading operation of a camera.

Some of these have a back cover that opens and closes only the cartridge chamber, and if you close the back cover with a part of the film leader left outside the camera after loading the cartridge into the camera, the film leader exposed from the cartridge will be removed. Prior to the filing of this application, a loading device has been proposed which automatically unwinds a portion of the film and then automatically winds it up again.

The above device is equipped with a band-shaped film drawing member whose one end is connected to the film take-up spool and whose other end reaches the vicinity of the cartridge chamber.At the end of the film drawing member facing the cartridge chamber, there is a perforation of the film. Protrusions that can be engaged with are provided, and by empty rewinding,
A part of the leader of the film is engaged with the protrusion, and during subsequent idle winding, the film is wound onto the spool together with the film drawing member.

Furthermore, when the film is to be rewound after shooting, the shaft of the cartridge is rotated to rewind the film into the cartridge, and at the same time, the film drawing member that engages with the film is returned to its initial position together with the film. ing. That is, as shown in FIG.
J4b is fixed, and protrusions (not shown) are formed on other parts.

In the chamber 20' in which the spool 20 is housed, a rod-shaped roller lever 32 is fixed 32a toward the main body side, and a roller 31 is rotatably supported at the tip of this lever. Therefore, the film 3 wound on the spool 20
is pressed toward the spool by this roller 31, and the film 3 will not sag.

[V1 Problem to be Solved by the Invention] As described above, the film drawing member 4 is formed with a protrusion, and the protrusion winds the film onto the spool, which is effective in loading the film, but the film is not wound properly. This may cause some inconvenience when returning it. That is, %14 As shown in FIG. 14, the film loading member or film leader 4 enters between the pressure plate 14 and the main body 1 together with the film 3 that is wound up by the cartridge shaft after photographing is completed. A conventional roller lever 32 that supports a roller 31 that guides a film is made by bending a metal plate, and there is a gap between the roller lever 32 and the main body 1. Further, since the film leader 4 was wound around the spool 20, it curled as shown in the figure.

For this reason, the film 3 is drawn smoothly between the pressure plate 14 and the main body 1, but the tip of the film leader 4 ends up between the main body 1 and the roller lever 32, and the film leader 4 is drawn smoothly between the pressure plate and the main body. I have a problem with not getting in.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a film feeding device in which a film leader, that is, a film drawing member smoothly enters between the main body and the pressure plate during rewinding.

[Means for Solving the Problems] In order to achieve the above object, the present invention is provided with a guide member in the spool chamber for guiding the film drawing member between the main body and the pressure plate. That is, the present invention includes a band-shaped film drawing member whose one end is connected to a take-up spool and whose other end is provided with a protrusion that engages with the perforations of the film, and when the cartridge is loaded into the cartridge chamber, the perforations of the film are or engages with the protrusion of the film draw-in member, so that the film passes between the main body and the pressure plate together with the film draw-in member and is wound onto the spool, and when the film is unwound, the protrusion of the film draw-in member returns to the vicinity of the cartridge chamber. In the spool chamber for storing the spool, a guide member for guiding the film drawing member to the gap is provided at a position corresponding to the gap between the main body and the pressure plate. .

[Function] Since the present invention is configured as described above, the cartridge is loaded into the cartridge chamber. Then, for example, a winding motor controlled by a microcomputer is activated, the perforations of the film engage with the protrusions of the film drawing member, and the film drawing member is wound into the spool, so that the film is also wound by a predetermined amount at the same time. The film is loaded.

For example, when the film has been photographed, a rewind motor is activated and the film is wound into the cartridge. At this time, even if the other end of the film drawing member, that is, the part where the protrusion is formed, is curled, the guide member is provided at a position corresponding to the gap between the main body and the pressure plate in the spool chamber. , the film drawing member is smoothly guided between the main body and the pressure plate, and then returns to the vicinity of the cartridge, that is, to the initial state.

[Embodiment] First, a first embodiment of the present invention will be described with reference to FIGS. 1.2 and 3.

In FIG. 1, the space on the right side is a patrone chamber 22. The fork 23 on the bottom of the cartridge chamber 22 is for rewinding the film.
The two claws 23a and 23b engage with the shaft of the cartridge, and the fork is rotated counterclockwise by a motor (not shown), thereby rewinding the film.

Inner rail 16. The lcs are formed integrally with the main body at predetermined intervals vertically, and these surfaces position the film in the optical axis direction. Further, the vertical positioning of the film is performed by a positioning bin 24. This is also provided on the upper side of the upper rail 1c, and the film passes between these bins. In addition, the opening 1a
is the aperture.

The outer rail 1d is for positioning the pressure plate that presses the film in the optical axis direction, and is also provided above the inner rail 1c.

The photocoupler 16 outputs a pulse signal every time the perforation of the film passes, and controls the film based on this signal.

The spool 20 at the left end is for winding up the film, and this spool has a portion 20a to which a film leader or lead-in member, which will be described later, is attached, and this portion is slightly lower than the other portions.

In the spool chamber 20b where the spool 20 is stored,
Along with the spool 20, a lever 18, a guide member 17, etc. are arranged. That is, as shown in FIGS. 2 and 3, one end of the film guide lever 18 is rotatably supported by a shaft 18a on the main body, and a guide roller 27 is rotatably provided near the tip. This roller 3 is a spool 20
is elastically pressed against the outer surface of the Therefore, the film 3 wound around the spool will not loosen.

As shown in FIG. 1, the tip of the film guide lever 18 is formed with a plurality of ridges and grooves 18b cut inward in the shape of a comb.

A roller cover 17 is further provided in the spool chamber 20b. As shown in FIG. 3, this roller cover is provided at a position corresponding to the gap between the main body 1 and the pressure plate 14, the lower surface is formed smoothly into an arc shape, and the upper surface has a guide lever. A plurality of uneven lines 17a are formed to loosely mesh with the 18 uneven lines 18b. These concave and convex strips are arranged in a mutually meshed state to constitute a guide member.

Next, the structure near the patrone chamber 22 will be explained.

FIG. 4 shows a state in which a film or cartridge 2 is loaded, and the leader portion 3b of the film is exposed from the gap formed by the back cover 78 and the rear cover 10a. The back M7 is rotatable around the hinge portion 7b, and the cartridge 2 is pressed and fixed against the cartridge chamber 22 by a spring (not shown).

The film pressing roller 6 is rotatably supported with respect to the lever 5 about an axis 5b. This lever 5 is attached to the back M7 so as to be rotatable around 5a, and furthermore, the lever 5 is biased clockwise by a spring (not shown).

Therefore, the film 3 is urged toward the film surface side (upward in the figure) by the film pressing roller 6.

Further, the film detection lever 8 is attached to the rear cover 10 so as to be rotatable about a shaft 8a, and is biased by a spring in the clockwise direction by a contact piece 9. Therefore, the film detection lever tip 18b urges the film 3 toward the back cover, that is, downward in the figure.

Although the direction in which the film detection lever tip iab and the film press roller 6 are biased are opposite, the biasing force on the film detection lever side is stronger than the bias force on the film press roller, so the film press roller presses the film through the film 3. It is pushed back by the detection lever 8 and is in the state shown in FIG.

The film detection lever 8 cannot be rotated any further clockwise due to the presence of the film 3. Therefore, the contact piece 9 of the film detection switch does not come into contact with the contact piece 21. That is, the film detection switch remains OFF until the film is completely stored in the camera.

Also, in the initial state when loading the film,
Film leader 4 has its tip near the cartridge.
There, as shown in Figure 4, there is a film leader tab 4a.

FIG. 5 is a detailed perspective view of the claw portion of the film leader. This claw is formed by drawing a part of the flexible thin metal plate that makes up the film leader, increasing the strength of the claw and preventing deformation or damage due to external forces.

Next, a loading detection switch is constructed near the cartridge-side end of the pressure plate 14 that presses the film. This switch has a contact piece 12. as shown in FIG.
13 and an insulating member 11, the contact piece 12 is fixed to the insulating member 11, and the insulating member 11 is further fixed to the main body 7 of the camera. Further, the contact piece 12 is located inside the surface 11a of the insulating member. This is to prevent contact pieces 12 and 13 from becoming electrically connected via film leader 4 if the film leader is made of a conductive material and comes into contact with contact piece 12. The contact piece 13 is fixed to the pressure plate base plate 25,
Its end is urged toward the contact piece 12 by its own springiness. Therefore, if the film leader, lead-in member 4, or film 3 is interposed between the contact pieces 12 and 13 as shown in FIG. 4, there will be no conduction between the contact pieces 12 and 13, but the When the contact piece 13 is removed, the contact piece 13 comes into contact with the contact piece 12 and becomes electrically conductive.

The pressure plate 14 is biased toward the rail surface of the main body by a pressure plate spring 15 fixed to a pressure plate base plate 25, and positioning in the optical axis direction is performed by the rail portion 1d shown in FIG. Also,
The film sliding surfaces of the pressure plate 14 and contact piece 13 are chamfered and Rfi-embedded so that the film can easily enter.

FIG. 4 is a detailed perspective view of the film leader 4. In this example, the film leader is made of a thin metal plate,
The claw part 4 is formed by drawing. This allows the strength of the claw to be improved and the film leader to be integrated with the claw at the same time. Furthermore, it is desirable to provide a plurality of tabs to increase the probability that the tabs of the film leader will hit the perforations of the film. In the illustrated embodiment, three claws 4a are formed.

FIG. 6 shows a state in which the perforations 3a of the film 3 are caught on the claws 4a of the film leader 4, and the intervals between the perforations of the film and the claws of the film leader are approximately the same.

The loading detection switch is provided outside the perforations of the film and on the perforated side of a part of the film leader. This is because if the loading detection switch is attached at the bottom in the figure, when a part of the film leader passes through, the film will prevent contact pieces 12 and 13 from coming into contact even if loading is successful. This is because if it cannot be done, it will be judged as a loading failure.

Further, if this detection switch is provided inside the inner rail IC, there is a possibility that the contact pieces 12 and 13 may scratch the surface of the film to be photographed, which is not desirable. Further, in a place where the film leader's claw 4a passes, there is a possibility that the detection switch may be scratched or damaged by the film leader's claw, which is not desirable. Further, a detection switch is provided at the end of the pressure plate 14 on the cartridge chamber side in order to detect loading failure at an early stage.

The film 3 that has fallen into the camera is kited by the guide 1e, and is positioned vertically, between the film leader claw 4a and the film perforation 3a.
are arranged on the same line. here,
The film leader is also vertically positioned by guides 1e and 24. Further guide if, 24
is also a guide for positioning the film, and the width of the film leader and the film are almost the same.

During loading, the film leader 4 and the film 3 pass between the rail surfaces 1b and 1c of the main body 1 and the pressure plate 14, but at this time, the claw 4a of the film leader
4, a groove 14a is provided in the pressure plate 14, as shown in FIG. Here, FIG. 7 is a detailed view of a longitudinal section of the pressure plate portion.

Note that the guides lc, le, and 24 are made of a material harder than the film leader to improve the abrasion resistance against sliding of the film leader. In addition, in the illustrated embodiment, the film detection switch is shown as a contact type, but if it is implemented with a non-contact type detection means such as a photocoupler, it will improve the flatness of the film and prevent scratches on the film. There are other benefits.

When the film is loaded and the back M7 is closed, a back cover opening/closing detection switch (not shown) detects that the back cover is closed, and a rewinding motor (not shown) drives the rewinding fork 23 to perform a rewinding operation. As a result, the film 3 that is protruding outside the camera is stored inside the camera, and when the film 3 is stored inside the tip 8b of the film detection lever, the film 3 that is blocking the movement of the film detection lever disappears. Therefore, due to the spring force of the contact piece 9, it rotates clockwise and reaches the surface 7c of the back cover. At this time, the contact pieces 9 and 21 come into contact with each other, and the film detection switch is turned on.

Further, since the film pressing roller 6 and the lever 5 are not pushed back by the film detection lever 8 via the film, they are rotated clockwise by the spring force applied to the lever 5, and the film 3 is moved to the film guide 4.
press against.

Immediately when the film detection switch is turned on, the film rewinding motor is stopped to stop the film rewinding operation.

At this time, by making the distance from part 2b where the film comes out from the cartridge to the tip 8b of the film detection lever shorter than the distance from part 2b to the loading detection contact piece 13, the stored film can be detected by the loading detection switch. This prevents it from getting caught on the edge of the pressure plate and stopping.

In this way, if the distance from the tip i8b of the film detection lever to the part 2b where the film comes out from the cartridge is shorter than the distance from part 2b of the cartridge to the loading detection switch 13, the film 3 and the film leader 4 will overlap. The length is shorter than the conventional one, and the probability that the claw 4a of the film leader engages with the perforation of the film is significantly reduced, resulting in a reduction in loading reliability. Therefore, in this embodiment, the cartridge chamber 22 and the aperture 27 shown in FIG.
In order to widen the distance between the two and keep the overall size of the camera the same, the above problem is solved by arranging a cartridge chamber on the side of the focal plane shutter 21 where the drive section 21a is located, as shown in FIG. Improves loading reliability.

Further, even if an attempt is made to stop the motor immediately, the film being rewound by the motor will overrun to some extent, so that the film will stop when it is inside the tip 18b of the film detection lever. Furthermore, when the film detection switch is located further away from the loading detection switch, pressure plate, etc., the motor is stopped a little later than when the film detection switch is turned on, thereby ensuring that the film falls onto the film leader. I can do it.

FIG. 8 is a state diagram when the film 3 has been stored, and the film 3 is pressed against the film leader 4 by the film pressing roller 6. Further, light entering through the gap between the back cover 7 and the rear cover 10 is blocked by the film detection lever. The perforations of the film 3 and the tabs 4a of the film guide are on the same line, so when the film is pressed against the film leader or in the next operation, the tabs 4a of the film guide enter the perforations and the film leader 4 and film 3 are engaged. It is designed to match.

When the rewinding motor stops, the winding motor (not shown) is then rotated in the normal direction to rotate the spool 20 clockwise. Then, the film leader 4 engaged with the spool 20a also moves together with the spool and is taken up by the spool. As a result, the claw 4a of the film leader also moves toward the spool chamber 20b (to the left). At this time, the tab of the film leader enters and engages the perforation controller of the film located on the same line as the tab 4a of the film leader, and the film 3 also moves to the spool chamber.

During this process, if the claw 4a of the film leader does not enter the perforation of the film, only the film leader moves toward the spool chamber, but in this case, the film loading fails. in this way,
When only the film leader is wound, the end of the film leader is connected to contact piece 1 of the loading detection switch.
3, there is no obstruction between the contact pieces 12 and 13, so the contact piece 13 moves to the contact piece 12 due to its own spring force.
, and the loading detection switch turns ON. That is, if loading fails, the loading detection switch is turned on.

When a loading detection switch detects a loading failure, the winding motor is stopped, the winding operation is stopped, the winding motor is reversed, and the film leader is returned to its initial position.

In order to return the film leader 4 to its initial position, the winding motor (not shown) is first rotated in reverse to rotate the spool 20 in FIG. 6 (counterclockwise). At this time, the film leader, which is integrally fixed to the spool, is pushed toward the cartridge chamber 22. Then, the phase of the spool 20 is detected by the micro brush 25 attached to the spool 20 and the phase board 26 attached to the camera body 1, and the winding motor is stopped when the spool 20 rotates to a predetermined phase. The film leader 4 can be returned to its initial position.

When loading is successful, the film 3 is transferred to the pressure plate 14 and the rail surfaces 1b and 1c of the main body 1 together with the film leader 4.
It passes through the gap and moves to the spool side, but then it passes through the photo coupler 16 and is wound onto the spool.
This photocoupler outputs one pulse signal each time one perforation of the film passes, and when a predetermined number of pulses are counted, the winding motor is stopped and film loading is completed.

At this time, the film guide roller 27 is urged toward the spool so that the film leader 4 and film 3 are wound onto the spool without any gaps. Therefore, the film guide roller 27 is supported by a lever 18, which is rotatably supported around a shaft 18a, and further biased clockwise by a spring.

Next, the film rewinding operation in the above embodiment will be explained using FIGS. 1.2.3 and 5.

First, the return fork 23 shown in FIG. 1 is rotated counterclockwise by a rewind motor (not shown), and the film 3 is wound into the cartridge 2. At this time, the photocoupler 16 detects the interval between pulse signals output each time a perforation of the film passes. Then, as the end of film rewinding approaches and the film leader 4 passes through the photocoupler 16, the pulse signal is no longer output. From now on, the phase of the spool 20 is detected by the micro brush 25 attached to the spool 20 and the phase board 26 attached to the main body 1 as shown in FIG. to stop. Thereafter, the winding motor is reversed to push the film leader toward the spool chamber, and the winding motor is stopped at a phase in which the film leader is in its initial position, thereby completing the film rewinding operation.

This is because if you return the film at home by rotating the return fork, the tab of the film leader will remain caught in the perforation of the film when you remove the film. In this case, the user must remove the tab before removing the film, which is a cumbersome operation for the user.

Also, if you take out the film while the film is caught in the film, the film may be pulled out by the film and the film that has already been photographed may be damaged. Since there is a step of moving only the film leader to the cartridge chamber side while the film is in the same state, the tabs will naturally come off from the film perforations and the above-mentioned troubles will not occur.

In addition, the film leader can always be returned to its initial position without being affected by unstable elements such as film.
Another advantage is that the initial position of the film leader is always stable.

Also in FIG. 3, when the film is rewound, since the film leader 4 is taken up by the spool 20, it curls toward the inside of the spool as shown in the figure. For this reason, in order to prevent the film leader from falling between the film guide roller lever 18 and the main body 1 when being pulled by the film 3 and moving toward the pressure plate 14, and from getting caught in the film leader during rewinding, the uneven strip 18a is provided. The portions 17a are uneven so that they interlock with each other.

This allows the curled film leader 4 to be smoothly guided between the main body 1 and the pressure plate 14.

Although not shown, the camera according to this embodiment includes a microcomputer. This microcomputer includes a film detection switch, a loading detection switch, a Fort Cabra 16, and a microbrush 25.
．． A signal from 26 or the like is inputted to control the rewinding motor or the winding motor. The function will be explained next using a flowchart.

FIG. 9 is a flowchart for loading a film, and the loading operation will be explained using this diagram.

In step (002), it is determined whether the back cover has changed from the open state to the closed state.
003), otherwise go to step (002)
Repeat.

In step (003), the film detection lever 8 is in a state like that shown in FIG.
If F > state, the film exists, otherwise (ON) state, it is determined that the film does not exist. Then, if the film is present, that is, the film detection switch is in the (OFF> state), step (004) is performed.
If not, proceed to step (025),
No loading is performed.

In step (004), a timer 7 of the camera control microcomputer (not shown) is started, and the next step (005)
). In step (005), the rewind motor is driven and rewind operation begins. This pulls the film that is outside the camera into the camera. In the next step (008), it is determined by the film detection switch whether or not the film has been drawn in. If the film has been drawn in, the contact pieces 9.21 will come into contact as shown in Figure 8, and the film detection switch will turn ON.
) state, and if it is incomplete, the film detection switch will be (
OFF) state. That is, if the film has been completely drawn in, the process moves to step (009), and if it is not completed, the process moves to step (007). Step (007)
Then, it is determined whether the value of timer 7 is greater than a predetermined value (ffiAT (for example, 5 seconds). If it is longer than AT, the process moves to step (008); otherwise, the process moves to step (008).
Return to 06). If the value of timer 7 is greater than AT, it is determined that the film retracting operation is not performed for some reason, and this operation should be canceled (i.e., the return motor is stopped and this subroutine is executed in the next step (026)). At this time, it is preferable to inform the user that the loading operation was not performed normally by displaying a loading failure.When the value of timer 7 is smaller than AT, step (0091 is the film After the retracting operation is completed, the film rewind motor is stopped.

In the next step (010), timer 2 of the camera control microcomputer is started, and the process moves to step (011), where it is determined whether the value of timer 2 is greater than 100m5. This step is to wait until the motor stopped in step (00!l) is completely stopped and the film is pressed onto the film leader by the film presser roller 6 as shown in FIG. Any other value is also acceptable. If the value of timer 2 is greater than 100+ms, proceed to step (012); otherwise, repeat step (011).

In step (012), timer 3 of the microcomputer for controlling the camera is started, and the process proceeds to step (ot3). In step (013), the film winding motor is rotated in the normal direction to wind up the film leader with the spool. In the next step (014), it is determined whether or not the loading has failed using the loading detection switch described earlier. If the loading has not failed, step (014)
If the process fails, the process moves to step (015).

In step (015), since loading failure is detected, the winding operation is stopped and the winding motor is stopped. Then, in step (016), the spool is reversed by reversing the winding motor, and the film leader is pushed back into the cartridge chamber to return to the initial position. In step (017), the phase of the spool is adjusted, and it is determined whether the spool has moved to the phase (A) set to return to the film leader position or the initial position, and when the spool has reached the predetermined phase. If so, proceed to step (018); otherwise, repeat step (017). When the spool is driven to the predetermined phase (A), the winding motor is stopped in step (018), and this subroutine is ended in step (019), but at this time, the user is warned that loading has failed. Then it's even better.

If no loading failure is detected in step (014), the process proceeds to step (020), where a pulse signal is output every time the film passes through a perforation. The number of pulses of the photocoupler is counted and it is determined whether the number of pulses has reached 25 pulses. Here, if the predetermined number of pulses 25 has been counted, the process moves to step (023) to complete the loading operation, and if not, the process moves to step (02+).

In step (021), the value of timer 3 is set to a predetermined value BT.
(for example, 10 seconds), and if it is larger than a predetermined value BT, the process moves to step (022); otherwise, the process returns to step (014). If the value of timer 3 becomes larger than the predetermined value BT in step (021), it is determined that there is some abnormality in the loading, and in order to stop the loading operation, the hoisting motor is stopped in step (022), and in step (021), the hoisting motor is stopped in step (022). 027), this subroutine ends (at this time, it is better to display a loading failure message).

If a predetermined pulse signal is output from the photocoupler in step (020), the winding motor is stopped in step (023), and this subroutine is ended in the next step (024). At this time, it is preferable to display an indication of successful loading or to set a film counter to 1.

Next, the film rewinding operation will be explained using FIG. 10.

FIG. 10 is a flow chart of film rewinding. In step (102), in order to rewind the film, the rewinding motor is driven and the rewinding fork is rotated to wind the film onto the spool.

In step (103), the pulse interval of the pulse signal output from the photocoupler is detected, and the pulse interval is determined to be a predetermined value C (for example, 100 m
) to determine whether it is greater than. When the film leader is rewound to the point where it touches the photocoupler, the pulse signal is no longer generated, so the pulse interval increases and becomes a value larger than the predetermined value C, and it can be detected that the end of the rewinding operation is near. If it is detected that the end of this rewinding operation is near, the process moves to step (104), otherwise step (103) is repeated. Step (+04
) detects the phase of the spool and determines whether it has reached the phase (B) in which the leading edge of the film is removed from the pressure plate, and if it is detected that the leading edge of the film has moved from the pressure plate to the cartridge side, the process proceeds to step (105), and if so. If not, repeat step (104).

In step (105), the rewind motor is stopped to stop winding the film. In the next step (106), the winding motor is reversed and the spool is rotated counterclockwise, thereby pushing the film leader toward the cartridge chamber. This makes it possible to remove the claw of the film leader that is caught in the film cartridge, making it easier to take out the film.

In the next step (107), the phase of the spool is detected,
It is determined whether the position of the film leader is at the initial position of the spool (A). If the film leader has returned to the initial position, step (108)
), otherwise repeat step (107).

In step (108), since the film leader has returned to the initial position, the winding motor is stopped, and step (109)
) ends the film rewind subroutine.

Next, a second embodiment of the present invention will be described with reference to FIG.

In this embodiment, the guide member is made of an elastic plate. That is, the guide member 40 is in contact with the surface 41a of the lever 41 that holds the roller 42 for bringing the film 3 into close contact with the spool 2o, and the guide 40 is always in contact with the surface 41a of the lever 41 due to its own springiness. It looks like this. Therefore, the film leader does not get between the roller and the main body during unwinding.

FIG. 12 shows a third embodiment of the invention. According to this embodiment, the guide member 50 is rotatable about the shaft 50a, and is biased counterclockwise by a spring (not shown). Therefore, the guide member 50 is attached to the roller 5 in the palm of the hand.
The film leader is in contact with the inside of the extension part 51a of the lever 51 that holds the film leader 2, and prevents the film leader from getting between the roller and the main body.

Furthermore, in the embodiment 's4 shown in FIG.
The lever 61 and the guide member 60 are constructed so as to always overlap. This prevents the film leader from getting stuck between the roller and the main body during rewinding.The second to fourth embodiments described above have the advantage of having a simple structure and being able to be provided at low cost.

[Effects of the Invention] As explained above, according to the present invention, the spool chamber housing the spool is provided with a guide member at a position corresponding to the gap between the main body and the pressure plate. Even when curling, the guide member allows the tip to be smoothly guided into the gap between the main body and the pressure plate. Therefore, according to the present invention, an excellent effect can be obtained in that the film drawing member can be reliably returned to the initial position. Further, this guide member can be molded with resin, and has the advantage that it can be provided at low cost.

[Brief explanation of the drawing]

1 to 13 are diagrams showing embodiments of the present invention, FIG. 1 is a perspective view showing the outline of the first embodiment, FIG. 2 is a plan sectional view thereof, and FIG. 3 is an enlarged view showing the main parts thereof. 4 is an enlarged sectional view of the vicinity of the cartridge chamber, FIG. 5 is a perspective view showing an example of a film leader, FIG. 6 is a front view showing the cartridge loaded state, and FIG. 7 is a longitudinal section of the pressure plate portion. Figure 8 is an enlarged cross-sectional view showing the state in which the film is drawn into the camera body, Figures 9 and 10 are flowcharts showing autoloading and rewinding operations, respectively, and Figures 11 and 12 are
．． FIG. 13 is an enlarged sectional view showing the second, third and fourth embodiments of the present invention, and FIG. 14 is a sectional view showing a conventional example. 1...Main body 4...Film leader (film loading member) 4a
... Protrusion 14 ... Pressure plate 20 ... Spool 20b ... Spool chamber 22 ... Patrone chamber 17.40, 50.60 ... Guide member. 4 others

Claims (1)

[Scope of Claims] 1. A belt-shaped film drawing member is provided with one end connected to a take-up spool and the other end provided with a protrusion that engages with a perforation of the film, and when a cartridge is loaded into a cartridge chamber, the film is drawn in. the perforation engages with the protrusion of the film attracting member,
A spool chamber for storing the spool, in which the film is wound onto a spool together with a film drawing member passing between the main body and the pressure plate, and when the film is rewound, the projection of the film drawing member returns to the vicinity of the cartridge chamber. A film feeding device characterized in that a guide member for guiding the film drawing member to the gap is provided at a position corresponding to the gap between the main body and the pressure plate.