JPH01255842A - Film winding device - Google Patents

Abstract

PURPOSE:To surely release an engagement of a cam and an engaging member even if a voltage of a battery drops by setting the other member to a state that it is being engaged, when one member of a winding stop member and the cam is being released from the engagement. CONSTITUTION:In a winding stop member 22 and a one-rotation cam 10, when one member of them is being released from the engagement, the other member is being engaged, and in order to release this engaged state, a large load against energize-force of a spring becomes necessary. Reversely speaking, when one member of them is engaged, the other member can be released from the engagement by a small load. Accordingly, after a film has been fed by one frame, when the winding stop member 22 and a winding stop lever 23 are engaged, the engagement of the one-rotation cam 10 and a run-over roller plate 26 can be released by a small load, and a reduction ratio of a gear for driving the one-rotation cam 10 can be reduced. In such a way, even if a voltage of a battery drops, the engagement of the one-rotation cam 10 and the run-over roller plate 26 can be released surely.

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION W The present invention relates to a film winding device that unwinds the film after charging mechanisms such as an aperture, a mirror, and a glosser in a camera.

2. Description of the Related Art Conventionally, film winding devices of various types have been proposed for cameras. For example, a differential gear mechanism having a planetary gear mechanism is connected to a motor, a film winding mechanism is connected to the planetary gear mechanism of this differential gear mechanism, and when the film winding frame is wound up by the wire winding-Length mechanism, the film winds up. A film stopping member for stopping the drive of the film (j4) is connected to the winding mechanism, and a charging mechanism for charging the aperture, mirror and shutter is connected to the planetary gear mechanism via a rotating cam. When a frame is wound up, a winding lever is provided to stop the rotation of the winding stopper, and after the rotating cam rotates and the charging operation of the aperture, etc. is completed, the winding stopper and the winding l- Some devices are configured to release the engagement with the lever.

In the above configuration, the release signal drives the bipedal motor to drive the planetary gear mechanism.

At this time, since the winding mechanism is stopped from rotating by the winding stopper member when the winding lever is engaged, the planetary gear mechanism rotates the charging mechanism to charge the aperture, mirror, and shutter. After the charging operation is completed, the rotating cam connects the winding member to the winding 1.
1. Disengage the lever, engage the cam engaging member with the rotary cam to stop its rotation, and drive the winding mechanism with the planetary gear mechanism to wind the film. conduct. When one frame of the film is wound up, the winding lever engages with the two-leg winding member to stop the rotation of the winding member, and the driving of the winding mechanism is stopped. Then, the rotary cam L is rotated again via the planetary gear mechanism, and the bipedal cam engaging member is disengaged, thereby stopping the drive of the motor and ending the film winding operation. . If the film is stretched at the final frame, the rotating cam is rotated via the planetary gear mechanism without engaging the stopper lever, and the motor is stopped when the cam engagement member is disengaged. , the process moves to the rewinding operation.

Problem to be Solved by the Invention However, in the above structure, after the film has been fed one frame and the winding stopper collar engages the two-foot one stopper member, it prepares for the next winding operation. When releasing the engagement between the rotary cam and the cam engaging member, it is desirable to reduce the load at the time of release in preparation for the next winding operation, but if the release load is too small, the filler When the film becomes a little heavy, the film stopper lever is released before it is engaged, and it is mistakenly determined that the film is stretched. Therefore, in order to reliably detect film tension, the release load must be increased to some extent. Therefore, the load required for the release operation in preparation for the next winding operation becomes large.
There was a problem in that this engagement could not be released when the battery voltage decreased.

Therefore, it is an object of the present invention to reliably determine the tension of the film, and to engage the rotary cam with the cam after the film is wound. It is an object of the present invention to provide a film winding device which can reduce the load of disengaging from an engagement member and easily disengage the engagement even if the voltage of a battery decreases.

Means for Solving the Problems In order to achieve the above objects, the present invention provides that the load for releasing the engagement between the cam and the retaining member that engages the cam is lower than that during film winding. It was designed so that it would become smaller after it was removed. That is, a motor, a differential gear mechanism connected to the motor, a winding mechanism connected to the differential gear mechanism for winding the film, a winding stop member connected to the winding mechanism, and a winding mechanism for winding the film one frame. a wind stop lever that engages with the wind stop member to stop rotation of the chain wind stop member and stop winding of the film by the winding mechanism; and an engagement between the wind stop lever and the wind stop member. a cam having an engagement release member on its outer circumferential portion and connected to the differential gear mechanism; a charge mechanism connected to the cam and charging a predetermined mechanism by rotational driving of the cam; and a charge mechanism that engages with the cam. an engaging member that stops the rotation of the cam; an engaging member that is bridged between the engaging member and the winding lever and biases both members toward each other; In the engagement relationship between the winding stopper member and the winding stopper lever, when either one of the engagement relationships is released, the load that releases the other engagement relationship is applied to either one of the engagement relationships. The biasing member is configured to have a force set so that when the engagement relationship is established, the force is greater than the load that causes the other engagement relationship to be released. The predetermined mechanism may be an aperture, a mirror, and a shutter, or may be only a shutter, a mirror and a shutter, or an aperture and a mirror.

Effects of the Invention In the above configuration, the motor is driven and the differential gear mechanism drives the charging mechanism via the cam to charge the mechanisms such as the diaphragm, the mirror, and the shutter. After the charging mechanism has finished operating, the cam disengages the winding stopper member from the winding stopper lever, and the bipedal cam is engaged by the engagement member. At this time, since the engagement between the winding stopper member and the winding stopper lever has been released, the engagement between the cam and the engaging member will be released unless a large load is applied that resists the biasing force of the biasing member. I can't. Therefore, the winding mechanism is driven to rotate the winding stopper member. When the film has been fed h month frames, the winding lever engages with the winding member to stop driving the winding mechanism, and the film winding operation is completed. The above-mentioned engagement operation enables the engagement between the cam and the engagement member to be released with a small load, and after winding is completed, the above-mentioned cam rotates and the engagement between the cam and the engagement member is released and the next Prepare for the film winding operation.

Effects of the Invention According to the above configuration, during the charging operation, the engagement between the cam and the engaging member is released, and the winding stopper member and the winding stop lever are surely engaged by the urging force of the urging member. On the other hand, during the film winding operation, the bipedal cam and the retaining member are reliably engaged, and the winding stop member and the winding stop lever are disengaged. In other words, when one of the winding member and the cam is disengaged, the other member is engaged, and in order to release the engaged state, the biasing force of the biasing member must be applied. A large load that can be resisted is required. Conversely, if one of the members is engaged, the other member can be disengaged with a small load. Therefore, when the winding stopper and the winding stopper lever engage after the film has been advanced one frame, the engagement between the cam and the engaging member can be released with a small load, and the cam is driven. The reduction ratio of the gear can be reduced, and even if the voltage of the battery decreases, the engagement between the cam and the engagement member can be reliably released.

Furthermore, it is possible to reliably detect that the film is stretched.

Embodiments of the present invention will be described in detail below with reference to FIGS. 1-13.

FIG. 1 schematically shows a film winding/rewinding device having a film winding device according to this embodiment.

In FIG. 1, l is a reversible motor for winding and rewinding, which is built into the spool 9. As shown in Fig. 3, a gear Ib is attached to the shaft 1a of the motor l.
This gear lb meshes with the large gear 2a of the reduction gear 2. The small gear 2b of the reduction gear 2 is the large gear 3a of the reduction gear 3.
The first small gear 3b of the reduction gear 3 is in mesh with the second small gear 3b.
As shown in the figure, there are three planetary gears 4, 4. =1 and meshed. Each planetary gear 4 has a shaft 5 integrally formed with the gear 5.
The shaft 5b is attached at its upper part to a carrier plate 6, and the carrier plate 6 is mounted to rotate integrally with the shaft 7. The upper part 7a of the shaft 7 fits into a hole 91a of a base plate 91 fixed to a body (not shown), and the lower part 7b of the shaft 7 fits into a hole 94a of a bearing 94 attached to a base plate 92 fixed to the body. can be fitted and rotated. This shaft 7 also serves to rotationally support the reduction gear 3 and a reduction gear 8, which will be described later. Three planetary gears 4.4.4
meshes with an internal gear 8a formed inside the reduction gear 8. First small gear 3b of reduction gear 3 and planetary gear = 1
．． 4.4, the internal gear 8a of the reduction gear 8, the gear 5, and the carrier plate 6 constitute a planetary gear mechanism.

That is, due to the rotation of the planetary gears 4.4.4, the reduction gear 8 is rotated via the internal gear 8a, and the planetary gears 4.4.4 are rotated.
4 rotates the gear 5 and the carrier plate 6 together with the shaft 7. Whether the planetary gear 4 rotates or revolves around its axis depends on which of the load applied to the reduction gear 8 and the load applied to the gear 5 is smaller. A gear 111 rotatable around the upper part 8b of the moon speed gear 8 is fitted, and a spring 112 is wound around the outer peripheral surface of the lower part 1llb of the gear i11. This spring l12
An arm 112a protrudes from the lower side, and this arm 112a is fitted into a notch of an annular projection 8d provided on the reduction gear 8. The rotation of the reduction gear 8 is transmitted to the gear 21 via the spring 112.

The gear 21 meshes with an internal gear 9a formed integrally with the spool 9, and rotation of the gear 111 causes the spool 9 to rotate. The torque that can be transmitted between the spring 112 and the gear 111 is set to a sufficient amount of force to wind up the film on the spool 9, and normally there will be no slippage. This spring 112 is provided so that the photographer can open the back cover and pull out the film by hand without rewinding the film wound around the spool 9. At that time, the spring +12 and the gear ill They end up sliding against each other.

A gear 8C is provided on the outer periphery of the reduction gear 8, and the gear 1
It meshes with 1. In FIG. 1, a gear 11 meshes with a gear 12, and the gear 12 and the gear 13 above it are connected via a spring 14, and rotate together or with relative sliding.

The top end 14a of the spring 14 is connected to the gear 12°1.
Notch +J< of cylinder 76 rotatable around the same axis as 3
76a, and a spring 77 is wound around the cylinder 76. The second end of the spring 77 is detached from the cylinder and fixed to a fixing pin (not shown). Therefore, although this cylinder 76 can be rotated counterclockwise even with a small torque, it cannot be rotated clockwise even when the maximum torque of the motor l is applied. Gear 13 is gear 1
5, the gear 15 meshes with a gear 16a formed integrally with the sprocket shaft 16, and the gear 16a further meshes with a gear 22a formed integrally with the outer peripheral surface of the winding stopper member 22. As is clear from the above, the reduction gear 3,
Planetary gear 4, gear 5, carrier plate 6, shaft 7, reduction gear 8
and gear II+ constitute a differential gear mechanism.

As shown in FIG. 5, the sprocket shaft 16 is rotatable by fitting into the hole 91b of the base plate 91. is engaged in. There is a slight play between the sprocket shaft 16 and the sprocket 17 in the direction of rotation, and the spring 21 urges the sprocket shaft 16 relative to the sprocket 17 in the winding direction. Pattern 1 is placed on the upper part 16c of the sprocket shaft 16.
A base plate 18 having a diameter 8a is attached and rotates integrally with the sprocket shaft 16. The contact pieces 19 and 20 slide on the pattern 18a of the substrate 18, and the third switch S
When the Subroqueso 1-17 is rotating, the third switches S to V3 are turned on and off repeatedly. As is clear from the above, the spool 9 and the gear l 1.1
2. +3, spring 14, gear +5, sprocket shaft 16, and spring 17 constitute a film winding mechanism.

On the other hand, in FIG. 1, the gear 5 is the gear 10a of the one-rotation cam 10.
They are interlocked. The one-rotation cam 10 has a notched gear 10
b, a mirror/shutter charge cam portion 10c, a crossing roller cam portion 10d as a convex portion, a winding release cam portion 10e, and a switch cam recess portion 10f. The notched gear tab is connected to the first aperture charge gear 5! after the one-rotation cam 10 has rotated a predetermined amount in the counterclockwise direction. The bevel gear 51b of the first throttle charge gear 51 meshes with the spur gear 51a of the second throttle charge gear 52.
The flat gear 52b of the second aperture charge gear 52 engages with an aperture ring gear (not shown) to release the aperture lever. mirror·
A tip 28a of a mirror charge lever 28, which is biased counterclockwise around the axis P by a spring 29, is in contact with the outer peripheral surface of the shutter charge cam portion 10c. The radius of the outer peripheral surface of the mirror/shutter charge cam portion 10c increases as the cam 10 rotates counterclockwise, and at a certain angle, the radius of the outer peripheral surface suddenly decreases to the original radius. Therefore, when the one-rotation cam 10 rotates counterclockwise, the mirror charge lever 28 rotates clockwise about the axis P+ against the force of the spring 29. The mirror lever 61 faces the bent portion 28b at the rear end of the mirror charge lever 28 after the release, and as the mirror charge lever 28 rotates clockwise, the mirror lever 28 is pushed to the left in FIG. The shutter is charged at the same time as the mirror is lowered. As is clear from the above, the above 1. A charging mechanism is constituted by the second erroneous charge gear 51, 52 and the mirror charge lever 28.

An engagement roller 26a pivotally supported at the tip of a get-over roller plate (cam engagement lever) 26 as an engaging member is disposed within the rotation locus of the get-over roller cam portion 10d, and as shown in FIG. It is biased clockwise around the axis 12 by a torsion coil spring 34, which serves as a biasing member, and is applied between the roller plate 26 and a winding stop lever 23, which will be described later. When the one-turn cam 10 has rotated a predetermined amount in the counterclockwise direction, the override roller cam portion 10d comes into contact with the roller 26a of the override roller plate 26. At this time, unless the one-turn cam 10 has a predetermined torque or more, the one-turn cam 10 cannot rotate counterclockwise. When a certain predetermined torque is applied to the single-rotation cam 10, the single-rotation cam 10 rotates counterclockwise while rotating the crossover roller plate 26 counterclockwise around the axis 27. When the convex portion 23c of the wind stop lever 23 is engaged with the recess 22b of the wind stop member 22, a bin 23d formed on the wind stop lever 23 is disposed within the rotation locus of the wind stop release cam portion 10e. ing. When the one-rotation cam 10 rotates counterclockwise, the winding release cam portion 10e releases the pin 2 of the winding lever 23.
3d, the winding stop lever 23 is rotated clockwise around the axis 21, and the engagement between the protrusion 23c of the winding stop lever 23 and the recess 22b of the winding stopper member 22 is released. . The winding stopper lever 23 is rotated counterclockwise by a torsion coil spring 34 that is applied between the lever 23 and the above-mentioned overpassing roller plate 26, and a leaf spring 30 that is in contact with the bent portion of the winding stopper lever 23. energized. The leaf spring 30 and the opposing temporary spring 31 constitute a first switch SW1, and when the convex portion 23c of the winding stopper lever 23 is engaged with the concave portion 22b of the winding stopper member 22, the first switch SW1 is activated.
When the switch SWI is off and disengaged, the first switch SWl is in the on state. Above spring 3
4 is the above-mentioned overpassing roller plate 26 and the above-mentioned winding stop lever 23
The engagement relationship between the cam 10 and the overpassing roller plate 26 and the winding stopper member 22 and the winding stopper lever 23 are In the engagement relationship, when either one of the engagement relationships is released, the load that releases the other engagement relationship is applied, and when either of the engagement relationships is established, the load that releases the other engagement relationship is applied. The ability is set so that it is greater than the load to be applied.

The switch cam recess 1Or of the one-rotation cam 10 has a sleeve core P.
The switch lever 27 that rotates 4 times is at one end 271]
The other end 27a is brought into contact with the other end 27a by being biased counterclockwise by the temporary spring 33. A temporary spring 32 is arranged opposite to the temporary spring 33, and constitutes the second switch SW2. When the tip 27a of the switch lever 27 falls into the switch cam recess 10f of the one-rotation cam 10, the second switch SW2 is in the OFF state, and in other cases, the second switch SW2 is in the ON state.

- The arrangement of each cam part of the rotary cam 10 and the notched gear 10b is arranged in the following order when the one-rotation cam 10 rotates counterclockwise.

First, after the cam 10 has rotated by a certain amount, the notched gear 1. Ob meshes with the lower gear 51a of the first throttle charge gear 51. Almost at the same time, the mirror chart bar 28 starts to rotate clockwise by the mirror/shutter charge cam section 10c. Also, at this time, the tip 27a of the switch lever 27 comes off from the switch cam recess 10f almost simultaneously, and the second switch SW2 is turned on. Then, the radius of the outer peripheral surface of the mirror/shutter charge cam portion 10c suddenly decreases at a certain portion, and the mirror charge lever 28 is rotated counterclockwise around the axis 21 by the spring 29 and returned to its original state. Next, the notched gear 10 and the spur gear 51
The mesh with a becomes disengaged. Here, even after the mirror/shutter charging is finished, is the aperture charging still being performed for a while?
This is to prevent the stroke from being insufficient, that is, to prevent overcharging, and since the overcharging stroke results in a considerable load, this is to prevent these loads from stacking up at once. In other words, after the overcharging of the mirror/shutter charge is completed, only the aperture is overcharged. Thereafter, the wind stop release cam 10e comes into contact with the pin '23d of the wind stop lever 23, causing the wind stop lever 23 to rotate clockwise. Thereafter, the overcoming roller cam portion 10d comes into contact with the roller 26a of the overcoming roller plate 26, and the overcoming roller plate 26 is rotated counterclockwise. The moment the roller 26a rides on the large radius portion of the outer peripheral surface of the roller cam portion 10d, the tip 27a of the switch lever 27 falls into the switch cam recess 10f. And roller 26
A falls into the concavity log, climbs the gentle slope 10h again, and returns to the starting point.

As shown in FIG. 6, the tip 23 of the winding lever 23
The end surface 24b of the winding locking lever 24, which is urged clockwise around the axis 26 by the spring 25, is in contact with the end surface 24b. When the winding stopper lever 23 rotates clockwise around the axis P2 and the convex portion 23c of the winding stopper lever 23 disengages from the recess 22b of the winding stopper member 22, the winding stopper lever 2
4 C III It rotates clockwise around the core I's, and its tip 24c comes into contact with the tip 23e of the winding stop lever 23. The winding release cam portion 10e of the one-rotation cam 10 is connected to the bin 23.
d, the winding stop lever 23 tries to rotate counterclockwise due to the biasing force of the spring 34, but the end surface 23a of the winding stop lever 23 touches the end surface 24a of the winding stop lever 24. The convex portion 23c of the winding stopper lever 23 touches the concave portion 22b of the winding stopper member 22 and cannot rotate.
cannot be engaged with.

In Figure 6, it is rotatable around the axis 28/(-1
14 is biased clockwise, and its negative end bent portion 11
4a is engaged with one of the recesses 113a on the outer peripheral surface of a locking plate 113 attached to the reduction gear 8. And then, the other end of lever 114! +4b is arranged below the winding stopper lever 23 so as to face its pin 23d, and when the winding stopper lever 23 rotates clockwise around the axis Pt, the pin 23d provided on the lower surface of one end of the winding stopper lever 23 is arranged to face the pin 23d of the lever 114. The shaft center P of the lever 114 is brought into contact with the end surface 114b of the other end.

Rotate counterclockwise and lock plate! The engagement between the concave portion 113a on the outer peripheral surface of the lever 13 and the bent portion 114a of the lever 114 is released.

In FIG. 1, the second small gear 3C at the bottom of the reduction gear 3 is engaged with a rewinding gear 71, and a switching gear that is pivotally supported at the tip of a carrier 73 that rotates around the same axis 28 as the rewinding gear 71. A planetary gear 72 meshes with the rewinding gear 71. This switching planetary gear 72 is disposed opposite to a gear 74a at the left end in the figure of a rewinding gear train 74. The gear 74'b at the right end of the rewinding gear train 74 meshes with the rewinding fork gear 75, and engages with the shaft of the trone through the protrusion 75b of the rewinding fork 75a integrally formed on the upper surface of the rewinding fork gear 75. Then, the film is rewound into the cartridge by clockwise rotation of the rewind fork gear 75.

As shown in FIGS. 1, 3, and 4, an encoder plate 103 is attached to the lower part of the large gear 3a of the reduction gear 3, and a pair of contact pieces 101 fixed to the base plate 92 and 1
02 slides on the encoder plate 103. One contact piece 1
01 is the comb-shaped notch turn 103a on the other contact piece 1.
02 constitute a fourth switch SW4 by sliding on the common turn 103b, and the fourth switch SW4 generates pulses by rotating the encoder plate 103. The rotational speed of the motor 1 can be detected using this pulse. Since the motor 1 has two types of windings with different characteristics, an encoder plate 103 is provided to switch between these windings at a certain constant speed.

As shown in FIGS. 1 and 7, a roller 82 that presses the film in contact with the outer peripheral surface of the spool 9 is pivotally supported by a bent end portion stb of a roller holder 81 that is rotatable around an axis 27. As shown in FIGS. The protruding portion 81a of the roller holder 81 is biased counterclockwise around the shaft center 29 by the arm 83a of the torsion coil spring 83, and the roller 82 is attached to the outer peripheral surface of the spool 9 so that the film is wound around the spool 9. It is in contact with the A spring 85 is wound around the small diameter cylindrical portion 9b at the top of the spool 9.

An upper end 85a of this spring 85 is inserted into a gap between bent portions 84b and 84c at the tip of a roller release lever 84 that rotates around the same axis 27 as the roller holder 81.

The lower end 85b of the spring 85 contacts a fixing pin (not shown) when the spool 9 rotates by a predetermined angle in the direction opposite to the winding direction. It is designed so that it does not rotate as a unit. The bent portion 84a near the axis P7 of the roller release lever 84 contacts the arm 83a of the torsion coil spring 83 and charges the torsion coil spring 83 when the roller release lever 84 rotates clockwise around the axis P7. I have to. When the torsion coil spring 83 is charged by the roller release lever 84, the roller holder 81 is no longer subjected to the biasing force of the torsion coil subjig 83, and the roller 82 is no longer able to press the film.

The motor l is the motor l. Based on the detection signal from the second switch SW1.2, the microcomputer 40, which will be described later, drives the film forward and backward to wind and rewind the film.

The operation of the configuration as described above will be explained.

In response to the release signal, a release magnet (not shown) is energized, the aperture is narrowed down by the force of the spring, and the mirror is raised. At this time, the mirror lever 61 moves to the right in FIG. 1 and comes to a position immediately adjacent to and opposite the bent portion 28b of the mirror charge lever 28. Thereafter, when a shutter (not shown) runs to complete exposure, the motor I is energized and the motor gear Ib rotates clockwise. motor gear l
The large gear 2a of the reduction gear 2 that meshes with the gear b rotates counterclockwise, and the reduction gear 3 that meshes with the small gear 2b rotates clockwise. At this point, the convex portion 23c of the winding lever 23 is
and the concave portion 22b of the winding stopper member 22 are engaged with each other, and the concave portion 113a of the locking plate 113 and the bent portion 114 of the lever 114 are engaged with each other.
Since gear a is engaged, the reduction gear 8 cannot rotate, and the three planetary gears 4.4.4 cannot rotate. Therefore, the three planetary gears 4.4.4 revolve, and the gear 5, carrier plate 6, and shaft 7 rotate together clockwise. The one-rotation cam 10 starts rotating counterclockwise, and when it rotates by a predetermined amount, the notched gear Sob engages with the flat gear 51a of the first aperture charge gear 51 and charges the aperture via the second aperture charge gear 52. Make it open. At almost the same time, the mirror charge lever 28 is rotated clockwise around the axis P1 by the mirror/shutter charge cam section 10c, and the mirror/<-61 is moved to the left in Fig. 1 to lower the mirror. , charges the shutter.

Further, the tip 27a of the switch lever 27 comes off the switch cam recess 101, and the switch lever 27 is moved to the center P4.
The contact pieces 33 and 32 are brought into contact with each other by rotating clockwise, and the second switch SW2 is turned on. Then, when the radius of the outer circumferential surface of the mirror shutter charge cam portion 10c suddenly decreases, mirror shutter charging is completed, and the mirror charge lever 28 rises to the spring 29 and rotates counterclockwise around the center P1. It rotates and returns to its original state. After that, the notched gear tab is connected to the first throttle charge gear 51.
When the spur gear 51a disengages, the aperture charging is completed. Subsequently, the wind stop release cam portion 10e contacts the bin 23d of the wind stop lever 23, rotates the wind stop lever 23 clockwise around the axis Pt, and the convex portion 23c of the wind stop lever 23 and the wind stop member 22 are rotated clockwise. The engagement with the recessed portion 22b is released. As a result, the first switch SWI is turned on. Then, the bin 23d of the wind stop lever 23
The lever 114 is rotated counterclockwise around the axis 211 by contacting the end surface 114b of the lever +14 and the recess 113 of the locking plate 113.
The engagement with a does not come off. Further, the winding locking lever 24 rotates clockwise, and the tip 24c of the winding stopping lever 23 is rotated clockwise so that the tip 24c
It contacts 3e.

At this time, the engagement between the protrusion 23c of the winding lever 23 and the recess 22b of the winding member 22 is disengaged, and the locking plate 113 Since the engagement with the lever 114 is also disengaged, whether the three planetary gears 4°4.4 revolve or rotate at this point is determined by whichever has the smaller load. However, if the planetary gear 4.4.4 rotates at this point,
The wind stop release cam part 10e is connected to the bin 23 of the wind stop lever 23.
d', the convex portion 23c of the winding stopper lever 23 must again engage the recess 22b of the winding stopper member 22 when film winding is started and exactly one frame has been wound, as will be described later. It should be impossible, but it becomes impossible. In order to prevent such a phenomenon, as will be described later, a load is placed on the film winding system so that the torque that the unwinding cam part 10e passes through the abutting part of the bin 23d is lighter even when there is no film. The planetary gear 4.4.4 continues to revolve.

When the winding stop release cam part foe passes, the winding stop lever 2
3 attempts to rotate counterclockwise due to the spring force of the spring 34, but its tip 23a is stopped by the locking lever 24.
Since it is in contact with the end 24a of the holder, it cannot be rotated. When the one-rotation cam 10 further rotates counterclockwise,
The overcoming clutch cam portion 10d immediately overrides the overcoming roller plate 2.
The roller 26a is pivotally supported at the tip of the roller 6. At this time, the one-rotation cam 10 cannot rotate the overpass roller plate 26 counterclockwise. This is because, as will be described later, the planetary gears 4, 4.4 rotate on their own axis to wind up the film, but the load on these gears is lighter than the load caused by the one-rotation cam 10 pushing up and rotating the roller plate 26. This is because the force relief of the torsion coil spring 34 that biases the overcoming roller plate 26 is set in such a manner. therefore,
Here, the planetary gears 4, 4.4 once stop revolving and start rotating, and the reduction gear 8 is rotated counterclockwise. Then, the gear II+ is rotated counterclockwise via the spring 112, and the spool 9 is rotated counterclockwise via the internal gear 9a of the spool 9 to wind up the film.

On the other hand, the outer gear 8c of the reduction gear 8 causes the gear 11 to
The gear 12 is rotated counterclockwise via . Since the spring 14 can transmit torque to the gear 13 when rotated counterclockwise, the gears 12 and 13 rotate together. At this time, the spring 77 wound around the cylinder 76 is loosened, and the cylinder 76 can rotate with a light load. As the gear 13 rotates, the gear 16a of the sprocket shaft 16 rotates counterclockwise via the gear 15, and the gear 22a of the winding member 22 rotates clockwise.

As the sprocket shaft 16 rotates counterclockwise, the sprocket 17 also rotates counterclockwise to feed the film toward the spool.

As explained above, the rotation of motor I is caused by sprocket 1.
7 only when there is no film or at the beginning of initial loading. The film is wound around the spool in normal shooting frames from the 3rd or 4th frame after initial loading, and in this case,
The speed at which the film is pulled by the spool 9 is faster than the speed at which the sprocket I7 is rotated by the motor l and the film is sent out. Therefore, at this time,
Since gear 13 rotates faster than gear 12, it will slip between gear 13 and spring 14.

The winding stopper member 22 rotates clockwise due to the rotation of the sprocket shaft I6. As shown in FIG. 6, the winding member 22
has a convex portion 22c immediately next to the concave portion 22b that was engaged with the convex portion 23C of the winding stop lever 23, and as soon as the winding stopper member 22 starts rotating clockwise, this convex portion 22c
However, the convex portion 2 of the winding stop lever 23 that has retreated from the concave portion 22b
3c, the winding stopper member 22 rotates clockwise while further pushing up the winding stopper lever 23 clockwise around the axis 21. The load at this time is made larger than the load passing through the portion where the unwinding cam portion 10e of the one-rotation cam 10 contacts the pin 23d, as described above.
The one-rotation cam 10 continues to rotate reliably. Then, the clutch cam portion 10d stops when it comes into contact with the roller 26a of the crossover roller plate 26, and at this point the planetary gears 4.4.
4 switches from revolution to rotation.

When the winding member 22 further rotates clockwise, the convex portion 22c contacts the end surface 24d of the winding locking lever 24, and the winding locking lever 24 is rotated around the axis P6 against the spring force of the spring 25. Rotate counterclockwise. As a result, the end 23a of the winding stop lever 23 and the end surface 24a of the winding lock lever 24 are disengaged, and the winding stop lever 23
rotates a little counterclockwise and comes into contact with the outer peripheral side surface 22d of the winding stopper member 22. In this state, the first switch SWI is still in the on state, and the lever 114 also rotates slightly clockwise due to the biasing force, but the tip 114a and the recessed die 3a of the locking plate 113 are not yet engaged.

The winding stopping member 22 continues to rotate, and when it has completed one rotation, the convex portion 23c of the winding stopping lever 23 is fitted into the recessed portion 22b and its rotation is stopped, and the film has been advanced by one frame. At this time, the first switch SWI is turned off. Then, the force of t<-t l 4 increases and rotates clockwise to connect the tip 114a and the locking plate 113.
engages with the recess 113a to stop the reduction gear 8 and the spool 9. Here, when the rotation of the winding stopper member 22 is stopped, the sprocket shaft 16 is also stopped immediately, but the engagement between the lever l14 and the locking plate 113 is different from the engagement between the winding stopper lever 23 and the winding stopper member 22. Since there is a slight delay in comparison, the spool 9 continues to rotate and pull the film. However, since play is provided between the sprocket shaft 16 and the sprocket 17 by the spring 21, even if the sprocket shaft 16 is stopped, the sprocket 17 can rotate a little, and the spool 9 can rotate the film. Even when pulled, a large tension is not applied to the film, and there is no problem of the film perforations tearing.

Note that if the lever 114 and the locking plate 113 are not engaged,
Even if the rotation of the winding stopper member 22 is stopped due to gear backlash, the rotation of the planetary gear 4.4°4 does not stop immediately, and the spool 9 rotates considerably, which cannot be handled by the amount of play mentioned above. The time loss also increases.

During film winding, the spring 85 wound around the upper cylindrical portion 9b of the spool 9 rotates counterclockwise to rotate the roller release lever 84 counterclockwise around the axis 27 via its arm 85a. However, since the roller release lever 84 is provided with a stopper (not shown) at a certain point to prevent it from rotating counterclockwise, it will slide between the cylinder 9b and the spring 85 with a light force. Further, as the sprocket shaft 16 rotates, the board 18 attached to the top thereof rotates, and the third switch SW3 repeats the on and off states.

The motor ■ continues to rotate, and when the lever ll4 and the locking plate 113 engage and the reduction gear 8 is stopped, the planetary gears 4, 4.4 are no longer able to rotate and begin to revolve again, and the cam 10 rotates once. rotates while rotating the overcoming roller plate 26 counterclockwise around the axis 22.

Here, the force that causes the one-rotation cam 10 to rotate the roller plate 26 counterclockwise is applied to the convex portion 23c of the stopper lever 23.
A torsion coil spring 34 is applied to the roller plate 26 and the winding stopper lever 23 so that when the recess 22b of the winding stopper member 22 is engaged, the coil spring 34 is smaller than when the engagement is disengaged. That is, the winding lever 23
When the winding stopper member 22 is disengaged, the torsion coil spring 34 is charged, and the overcoming roller plate 26
The urging force of becomes stronger. As will be explained later, the overpass roller plate 26 is also rotated counterclockwise when the film is stretched at the final frame, but it operates when a fairly heavy film is being wound and is incorrectly determined to be stretched. This is because it is better to operate with as light a force as possible when the film has been wound 137 times, because the speed will be faster and it will be more profitable. When the roller 26a passes over the roller cam part 10d, the tip 27a of the switch lever 27 drops into the switch cam part 10'', the second switch SW2 is turned off, and the motor 1 is braked. Since the motor l cannot stop immediately due to inertia, the one-rotation cam 10 continues to rotate, and the roller 26a is pushed into the recessed part 10 at one end.
After falling to g, climb the gentle slope 10h. This slope 1
0h acts as resistance and improves the effectiveness of the brakes.

Then, after the one-rotation cam 10 has completed almost one revolution, it completely stops and returns to its original state, thus completing the winding process. In addition, the first suite S to Vl.

FIG. 8 shows the timing relationship of the second switch SW2.

Incidentally, when the overcoming roller plate 26 operates, the one-rotation cam 10 receives the reaction force of the overcoming roller plate 26 and tries to move faster than the motor l. At this time, if the locking plate 1[3 and the lever 114 are not locked, when the motor l is braked, the single-rotation cam 10 will become the drive side, causing the spool 9 to reverse, and the single-rotation cam 10 will It moves regardless of the brake of motor 1 and cannot be stopped. By stopping the spool 9, this lever 114
The single-rotation cam 10 is brought into a connected state, and the one-rotation cam 10 is reliably stopped by the brake of the motor 1.

During the winding process, the clockwise rotation of the reduction gear 3 causes the rewind gear 71, which is meshed with the second small gear 3c of the reduction gear 3, to rotate counterclockwise.

Therefore, the carrier 73 rotates counterclockwise around the axis 28 due to the friction between the rewinding gear 71 and the carrier 73, so that the switching planetary gear 72 and the left end gear 74a of the rewinding gear train 74 are They never mesh. Further, during the above process, the encoder plate 103 is constantly rotating and the fourth switch SW4 is generating pulses. This pulse is constantly monitored by the microcomputer 40, and the windings of the motor 1 are switched at a certain speed.

Next, the operation during initial loading (idle feeding) will be explained. When the film is loaded and the back cover is closed, a switch (not shown) is turned on and the motor 1 is energized. The direction of rotation is clockwise, the same as when unwinding. As in the case of normal winding described above, first, the one-rotation cam 10 rotates counterclockwise, and the notched gear 10b moves to the first calibration gear 5I.
The mirror charge lever 28 is engaged with the spur gear 51a of the
Rotate clockwise around the shaft center 1). At this time, since no release operation is being performed, the one-rotation cam 10 is not subjected to any charging load and simply rotates idly. Then, the winding stop release cam portion 10e comes into contact with the pin 23d of the winding stopper lever 23, and the winding stopper 23 is rotated clockwise to be disengaged from the winding stopper member 22. Thereafter, the film is fed in exactly the same manner as described above, and when one frame has been fed, the one-rotation cam 10 begins to rotate again and the second switch SW2 is turned off. At this time, the motor 1 continues to be energized without applying a brake. Then, the one-rotation cam 10 continues to rotate, and the notched gear tab is again connected to the first throttle charge gear 51.
The mirror charge lever 28 is engaged with the spur gear 51a of the
rotates clockwise around the axis P1. The same operation is repeated until the fourth frame of the film has been fed and the second switch SW2 is turned off, and the microcomputer 40 applies a brake to the motor 1 to complete the initial loading. A timing chart at this time is shown in FIG.

Next, a case will be described in which the film is at its last frame and stretched during winding. When the film is stretched, the spool 9 cannot rotate, and the rotation of the reduction gear 8 is stopped. As a result, each planetary gear 4 is unable to rotate, and revolves in the same way as when the film is advanced one frame, causing the one-rotation cam 10 to rotate counterclockwise. As a result, the roller 26a of the crossing roller plate 26 moves to the crossing roller cam portion 1.
0d and the second switch SW2 is turned off.

Here, a brake is applied to the motor l via the microcomputer 40, and the cam 10 rotates once for a while, and then stops, as in the case of (2) when the winding is finished. At this time, the convex portion 23c of the winding stopper lever 23 and the winding stopper member 22
Since it does not engage with the recess 22b of the first switch S
W+ remains on, and when the microcomputer 40 detects that this switch is on, it is determined that the film has finished. Thereafter, as shown in FIG. 1O, the motor 1 is energized so as to rotate in a counterclockwise direction, which is opposite to the winding direction. Due to the reverse rotation of motor l, the second
Since the rewinding gear 71 rotates clockwise via the small gear 3c and rotates clockwise around the axis Pa of the carrier gear 36, the switching planetary gear 72 and the left end gear 74 of the rewinding gear train 74
a and mesh together. As a result, the rewind fork gear 75 rotates clockwise via the rewind gear train 74 to wind the film into the cartridge. On the other hand, the one-rotation cam 10 tries to rotate clockwise, but the roller 26a of the overpassing roller plate 26 falls into the recess 10g and cannot rotate any further.
The planetary gears 4, 4.4 rotate and rotate the reduction gear 8 clockwise. Therefore, the spool 9 rotates clockwise, and the spring 85 wound around the upper cylindrical portion 9b of the spool 9 causes the roller release lever 84 to rotate clockwise around the axis P7. Therefore, the roller release lever 8
The bent portion 84a of 4 is the arm 8 of the torsion coil spring 83.
3a to charge the torsion coil spring 83. At this time, the spring 85 and the cylindrical portion 9b of the spool 9 do not slip, and the torsion coil spring 8
It has enough transmission torque to charge 3.

When the torsion coil spring 83 is charged, the roller 82 is no longer subjected to biasing force, and as the spool 9 rotates, the film spreads into the spool chamber and does not come into contact with the spool 9. Therefore, the load when the film is wound into the cartridge by the rewinding fork gear 75 can be reduced, and scratches caused by the films rubbing against each other can also be prevented. Note that the lower end 85b of the spring 85 comes into contact with a stopper (not shown) when the roller release lever 84 is sufficiently rotated clockwise, so the spring 85 cannot rotate any further, and after that, the cylinder of the spool 9 The portion 9b and the spring 85 will slip. Also, due to the clockwise rotation of the reduction gear 8, the gear 12 is
rotates clockwise. As a result, the spring 146
The cylinder 76 attempts to rotate clockwise, but its upper end 14a engages with the notch 76a of the cylinder 76, and even if the cylinder 76 attempts to rotate clockwise, the spring 77 prevents it from rotating. , since the spring 14 cannot also rotate, it will slip between the gear 12 and the spring 14. Therefore, the rotation of gear 12 is the same as that of gear 13.
The gear 13 is free to rotate clockwise independently of the gear 12. The sprocket 17 rotates clockwise as the film or cartridge is rewound. Therefore, the sprocket shaft 16 also rotates clockwise, and the gear 13 rotates clockwise via the gear 15.

As mentioned above, the gear 13 can rotate independently of the gear 12, so it is not affected by the rotation of the motor 1, and when the film is rewound to the point where it comes off the sprocket 17, the sprocket 17 stops rotating. The clockwise rotation of the sprocket 17 causes the winding stop member 22 to rotate counterclockwise. As long as the winding stop member 22 is rotating counterclockwise, the convex portion 23c of the winding stop lever 23 and the recess 22b of the winding stop member 22 do not engage with each other. This is because the convex portion 22c of the winding stopper member 22
4d and rotates the winding locking lever 24 counterclockwise around the axis 22 to release the locking with the winding stopping lever 23, the convex portion 23c of the winding stopping lever 23 does not stop the winding. Immediately after engaging the concave portion 22b of the member 22, the convex portion 22c of the winding stop member 22 comes into contact with the convex portion 23c of the winding stop lever 23, and the winding stop lever 23 is rotated clockwise around the axis 22 again. This is because the winding stop lever 24 rotates clockwise and locks the winding stop lever 23.

The rotation of the sprocket 17 turns the third switch SW3 on and off repeatedly, but when the film comes off the sprocket I7, the sprocket 17 stops rotating and the third switch SW3 turns on and off.
The switch SW3 remains on or off. By detecting this state with the microcomputer 40, it is determined that rewinding has ended, and the power to the motor 1 is cut off.
The rotation of the rewind fork gear 75 is stopped. In this embodiment, in order to switch the windings of the motor 1, the rotational speed of the motor 1 is constantly monitored by the microcomputer 40, and when the film comes off the sprocket 17, at least the tora sprocket 17, the sprocket shaft 16,
Since the load on the motor 1 is reduced by the load of rotating the gear +2.15 and the winding stopper 22, the speed increases. By detecting this by the microcomputer 40, it may be determined that rewinding has ended.

After cutting off the power to the motor 1, as shown in FIG. 10, the motor 1 is then energized in the winding direction, the winding lever 23 and the winding stopping member 22 are engaged, and the first switch SWI is turned off. At this point, the brake is applied via the microcomputer 40 and the process ends.

If the film does not reach the final frame and the photographer wants to rewind at an intermediate frame, the photographer can press the switch and the film will rewind as shown in the timing chart in Figure 11.
Rotate the motor 1 once in the winding direction. Then, the one-rotation cam 10 rotates counterclockwise, and the charging stroke just idles as in the initial loading, but eventually the unwinding release cam portion foe comes into contact with the pin 23d of the unwinding lever 23 and the winding is stopped. Disengage the stop member 22.

At this time, the first switch SWI is turned on, and when this is detected by the microcomputer 40, the motor 1 is energized for the time period during which the overpass clutch cam portion 10d is predicted to contact the roller 26a of the override roller plate 26. After that, the current is cut off, and then the motor 1 is reversed. This allows the rewind fork gear 75 to rotate and rewind the film as described above. At this time, the clockwise rotation of the one-turn cam 10 is prevented at the tip 28a of the mirror charge lever 28 where the radius of the outer circumferential surface of the mirror/shutter charge cam portion 10c suddenly changes.
This is done by coming into contact with the

As mentioned above, when the microcomputer 40 detects the end of rewinding, the power to the motor 1 is cut off and the motor 1 is rotated in the winding direction again. At this time, even if the winding stopping member 22 or the locking lever 23 is engaged and the first switch SWI is turned off, the motor l continues to be energized, and the roller 26a of the overcoming roller plate 26 moves over the overcoming clutch cam portion 10d. When the second switch SW2 is turned off, the brake is applied, and the one-turn cam 10 rotates to its original state and stops, ending the process.

During each of the above operations, the rotation of the motor 1 is controlled by the microcomputer 40 as a control device.
Shown in Figure 2. In the figure, after the motor l is rotated in the forward direction to wind the film, it is determined whether the first switch SWI is off or not, that is, the convex portion 23c of the winding stopper lever 23 is engaged with the concave portion 22b of the winding stopper member 22. Determine whether or not. If the first switch SWI is off, that is, if the convex portion 23c is engaged in the concave portion 22b, the motor l is rotated in the forward direction.

Then, when the first switch SWI is turned on by disengaging the concave portion 22b of the winding member 22 and the convex portion 23c of the winding lever 23 by the unwinding cam portion 10e of the one-rotation cam 10, next It is determined whether the second switch SW2 is off, that is, whether the tip 27a of the switch lever 27 has fallen into the switch cam portion 10f of the one-turn cam 10. If the second switch SW2 is on,
The motor 1 continues to rotate until the second switch SW2 is turned off, that is, the tip 27a falls into the switch cam portion 10f. When the second switch SW2 is turned off, a brake is applied to the motor l to stop its rotation, and it is again determined whether the first switch SW1 is turned off. If it is off, it is determined that the film has definitely been advanced by one frame. If the first switch SWl is on, it is assumed that the film has reached the final frame, and the end of the film is detected, and the motor 1 is rotated in the reverse direction. Then, rewind the film into the cartridge. During this rewinding operation, the third switch SW3 repeats on and off states, and the third switch SW3 stops in the on or off state, or the rotational speed of the motor l increases, and the film is wound. When the end of the return is detected, a brake is applied to the motor l to stop its rotation. Immediately thereafter, the motor 1 is reversely rotated in the forward direction. Then, the first switch SWI is off and the second switch SW
2 is off, and both switches SWl, S
When both W2 are turned off, the motor 1 is braked to stop its rotation, and the film rewinding operation is completed.

In addition, FIG. 13 shows the first to fourth switches SWl to SW4.
The microcomputer 40 receives the on/off signals of the motor 1, and the microcomputer 40 controls the motor 1.
This shows a circuit that rotates forward and reverse. In the figure, a switching circuit is constructed by connecting four diodes and four transistors to the motor l, and the polarity of the DC voltage applied to the motor 1 from the microcomputer 40 is switched through the circuit, and the polarity of the DC voltage applied to the motor l is switched. Rotate in forward and reverse directions.

According to the above embodiment, during the charging operation, the one-rotation cam 10 is disengaged from the roller 26a of the overpassing roller plate 26 as an engagement member, and the urging force of the spring 34 causes the stopper member 22 to disengage from the roller 26a. During the film winding operation, the one-rotation cam 10 and the roller 26a of the overpassing roller plate 26 are securely engaged, and the winding stopper member 22 and the winding stop lever 23 are securely engaged. 23 is disengaged. That is, the winding member 2
2 and the one-rotation cam 10, if either member is disengaged, the other member is engaged, and in order to disengage this engaged state, it is necessary to resist the biasing force of the spring 34. A large load is required. Conversely, if one of the members is engaged, the other member can be disengaged with a small load. Therefore, when the film stopping member 22 and the film stopping lever 23 are engaged after the film has been fed one frame, the engagement between the one-rotation cam 10 and the roller 26a of the overpassing roller plate 26 is released with a small load. This makes it possible to reduce the reduction ratio of the gear that drives the single-rotation cam 10, and to reliably release the engagement between the single-rotation cam 10 and the overpass roller plate 26 even if the battery voltage drops. be able to.

Further, when the film reaches its final frame and the film is stretched between the spool 9 and the cartridge, the rotation of the winding mechanism and the winding stopper member 22 is stopped, and the winding stop lever 23 is not engaged with the winding stopper member 22 and the winding is stopped. Member 22 stops rotating. Then, due to the planetary gear mechanism, one rotation cam 1
0 rotates, and the engagement between the roller 26a of the roller plate 26 and the overpass clutch cam portion 10d of the cam 10 is released. Then, the tip 27a of the switch lever 27 engages with the switch cam recess 10r, and the switch SW2 is turned off. Therefore, when the film is stretched at the last frame, the switch SW
Since l is on and switch SW2 is off, it is possible to reliably determine that the film has reached the final frame by detecting the states of switches SWI and SW2.

Note that the present invention is not limited to the above embodiments,
It can be implemented in various other ways. For example, the differential gear mechanism is not limited to that of the embodiment described above, and may be of other mechanisms. That is, as shown in FIG. 14, the bevel gear 135 is connected to the shaft 13 of the spur gear 132.
The spur gear 132 is rotatable with a pin 135a perpendicular to 2a.
be placed in The bevel gears 136 and 137 are arranged opposite to each other so as to sandwich the spur gear 132 therebetween, and are placed on the same center as the shaft 132a of the spur gear 132.
Shafts 138, 137 for rotating 37 are arranged. The driving force of the motor is transmitted to the bevel gear 136. The bevel gear 135 meshes with the bevel gears 136 and 137. ” The bipedal spur gear 132 meshes with the spur gear 131 connected to the shaft 133.

In the above configuration, if the spur gear 132 is kept stationary,
Rotation of shaft 138 causes shaft 139 to rotate in the opposite direction, shaft 13B
rotate at the same speed. However, when the spur gear 132 is rotated around its shaft 132a, when the shaft 138 rotates in the same direction at a constant speed, the shaft 139 can be freely rotated slowly or rapidly to the left or right. 1
39 can also be made stationary. In the above configuration, the shaft 13
If the load on shaft 3 is heavier than the load on shaft +39, bevel gear 13
5 rotates, and the bevel gear 137 rotates. If the load on shaft 133 is lighter than the load on shaft 139, bevel gear 135
38 and 139, and the spur gear 132 also rotates. In the above embodiment, the first small gear 3b of the embodiment corresponds to the bevel gear 136, the planetary gear 4 corresponds to the bevel gear +35, the gear 5 corresponds to the spur gear 132, and the reduction gear 8 corresponds to the bevel gear 137, respectively.

Further, as an example of still another differential gear mechanism, as shown in FIG. 15, the structure is similar to that of FIG. 14 above, but instead of the spur gears 131 and 132, a bevel gear , 142, the shaft 143 is connected to the sleeve 138,
It is perpendicular to 139. That is, the shaft 133 is the bevel gear 1
41, and the bevel gear 141 and bevel gear 142 mesh with each other.

A casing 149 is fixed to the center of the bevel gear 142, and the casing 149 rotates integrally with the bevel gear 142. Inside this casing 149, the bevel gear 1
36 and 137 are housed so as to be rotatable, respectively, facing each other, and the bevel gear 136°137 and the small bevel gear 144,
mesh together. These small bevel gears 144, 144 are connected to each shaft 144.
a is rotatably supported by the casing 149, and the small bevel gears 144 and 144 are configured to rotate together with the casing 149. Therefore, the bevel gear 136°137
The shafts 138, 139 allow the bevel gear 144 to swing thereon.

In the above configuration, when the loads applied to the shafts 138, 139 are approximately the same, when the bevel gear 141 rotates the bevel gear 142, the casing 149 and the small bevel gears 144, 144 rotate integrally, and the sleeves 138, 139 rotate. Usually rotate at the same speed. When the load applied to the shaft 139 is greater than the load applied to the shaft 138, the sleeve 13B rotates faster than the sleeve 139. Incidentally, members similar to those shown in FIG. 14 are given the same numbers and their explanations will be omitted.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a film winding/rewinding device having a film winding device according to an embodiment of the present invention;
Fig. 2 is a partially cutaway perspective view of the planetary gear mechanism of the winding/winding/rewinding device, Fig. 3 is a sectional view of the planetary gear mechanism, and Fig. 4 is motor speed detection of the winding/rewinding device. A bottom view of the switch section, FIG. 5 is a sectional view of the sprocket section of the winding/rewinding device, FIG. 6 is a plan view of the vicinity of the winding lever of the winding/rewinding device, and FIG. 7 is a cross-sectional view of the sprocket portion of the winding/rewinding device. Plan view of the film roller release part of the return device, Nos. 8 to 11
The figures are timing diagrams of the winding/rewinding device during winding, initial loading, auto return, and intermediate rewinding, respectively. Figure 12 is a flowchart showing the operation of the winding/rewinding device. Figure 13 is a flowchart showing the operation of the winding/rewinding device. A diagram showing the rotation switching circuit of the motor of the winding/rewinding device,
14 and 15 are front views showing modifications of the differential gear mechanism in the above embodiments, respectively. l...Motor, 2,3.8...Reduction gear, 4...
Planetary gear, 5. +1.12. + 3.15.111・
...Gear, 6...Carrier plate, 7...Shaft, 9...
Spool, 10...one rotation cam, loa...gear,
10b...notch gear, 10C...mirror/shutter charge cam section, 10d...crossover roller cam section,
10e... Winding release cam part, 10r... Switch cam part, 10g... Recessed part, 10h... Slope, 14,
21.25, 29, 77.85.112... Spring, 16... Sprocket shaft, 17... Sprocket, 18... Board, 19, 20, 101, 102...
- Contact piece, 22... winding member, 22a... gear, 2
2b... Concave portion, 22c... Convex portion, 22d... Side surface, 23... Winding stop lever, 23a... End surface, 23c
...Protrusion, 23d...pin, 23e...tip,
24... Winding locking lever, 24a... End surface, 24
c... Tip, 26... Overpass roller plate, 26a...
・Roller, 27... Switch lever, 28... Mirror charge lever, 30, 31, 32° 33... Leaf spring, 34.83... Torsion coil spring, 40.
...Microcomputer, 51.52...1st. 2nd calibration charge gear, 61...Mirror lever, 71.
...Rewinding gear, 72...Switching planetary gear, 73...
Carrier, 74... Rewinding gear train, 75... Rewinding fork gear, 76... Cylinder, 81... Roller holder, 82... Roller, 84... Roller release lever,
91.92... Base plate, 94... Bearing, 103...
Encoder plate, 113...locking plate, 114...lever. Patent Applicant Minolta Camera Co., Ltd. Agent Patent Attorney Aohaku Ao and 2 others Figure 2 Figure 4

Claims (2)

[Claims] (1) A motor (1), and a differential gear mechanism (3, 4,
5, 6, 7, 8), and a winding mechanism (9, 11, 12, 1) connected to the differential gear mechanism (3, 4, 5, 6, 7, 8) and winding the film.
3, 14, 15, 16, 17) and the winding mechanism (9, 11, 12, 13, 14, 15,
16, 17), and a winding stop member (22) connected to the winding stop member (22) when the film is wound one frame.
2) to stop the rotation of the winding member (22), and the winding mechanism (9, 11, 12, 13, 14, 15,
16, 17), and an engagement release member (10e) that releases the engagement between the winding stopper lever (23) and the winding stopper member (22). a cam (10) connected to the differential gear mechanism (3, 4, 5, 6, 7, 8); A charging mechanism (51, 5) that charges a predetermined mechanism
2, 28), an engaging member (26, 26a) that engages with the cam (10) to stop the rotation of the cam (10), and the engaging member (26, 26a) and the winding stopper lever. (2
3) and both members (26, 26a; 23)
and the engagement relationship between the cam (10) and the engaging member (26, 26a) and the winding stopper member (22) and the winding stopper lever (2).
3), when one of the engagement relationships is released, the load that releases the other engagement relationship is
A biasing member (34) whose force is set so that when one of the engagement relationships is established, the force is set to be greater than the load that causes the other engagement relationship to be released. Film winding device. (2) The cam (10) has a convex portion (10d), and the engaging member (26, 26a) has the cam (10) at the tip end.
) comprises a cam engagement lever (26) having an engagement roller (26a) that engages with the protrusion (10d) of the winding member (22) and whose rear end is pivotably supported. )
has a recess (22b), and the winding stopper lever (23) has an engaging protrusion (23c) at its tip end that engages with the recess (22b) of the winding stopper member (22), and has a rear end. The part is supported coaxially with the engaging member (26, 26a),
The cam (10) and the winding member (22) are coaxial (
The film winding device according to claim 1, wherein the film winding device is arranged to rotate at P_2).