JPH0425525B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric drive device for a camera that sequentially drives each mechanism of the camera using a motor to take pictures.

Conventionally, in electric cameras with electric drive devices, two motors are used to simplify the operating mechanisms such as raising and lowering the mirror, charging the aperture, charging the shutter, and winding the film. There are known drive methods in which the driving parts are shared, and drive methods in which a single reversible motor is used and different drive parts are shared in accordance with forward rotation and reverse rotation. A drive system using two motors is difficult due to the arrangement of the motors and the space, making it difficult to downsize the camera. On the other hand, in the drive method using a single reversible motor, since there is only one motor, there is a relatively large possibility of downsizing the camera with the former drive method, but since the rotation direction of the motor is changed during the shooting process, , the motor control circuit becomes complicated, and when the motor changes direction of rotation, it is necessary to apply a brake to bring it to a sudden stop, and the time it takes for the motor to stop until it reverses after stopping, and the time it takes to reach the normal rotation speed, etc. This makes high-speed operation of the camera difficult. Furthermore, since a dedicated magnet is required to switch between forward and reverse power, it is extremely disadvantageous in terms of space and cost.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the above-mentioned known devices and to provide an electric drive device for a camera that is compact and capable of high-speed drive using one motor.

In order to achieve the above object, in the present invention, an interlocking means that rotates in one direction together with a motor drives an optical system operating mechanism such as a mirror and an aperture device that operate before exposure, and also drives an optical system operating mechanism such as a mirror and an aperture device that operate before exposure. and the film feeding means is driven by the clutch means being disengaged while the film feeding means is locked by the locking means that locks after feeding one frame of the film. At the end of the operation of the optical system operating mechanism before exposure, the clutch means is temporarily engaged to temporarily stop the rotation of the interlocking means to prevent overrun of the optical system operating mechanism. It is characterized by what it did.

The present invention will be described in detail below based on embodiments shown in the accompanying drawings.

FIG. 1 is an explanatory view showing an embodiment of the present invention. When a back cover lock (not shown) that locks the back cover 1 is removed, the back cover 1 is opened and moved to the left rear in the figure. The back cover interlocking lever 3, which is negatively biased by the spring 2, rotates counterclockwise about the shaft 4. The cam lever 5 is configured to rotate around a shaft 7 by a spring 6 so that one end 5a is negatively biased by the cam surface of the cam 8.
The winding limit lever 9 has one end 9d in contact with the cam lever 5 due to a spring 10 which is weaker than the spring 6, and the other end 9c contacts the groove 11 of the winding limit cam 11 in the winding completion state or before the winding start state shown in the figure.
It is configured to engage with a. In the above system, the counterclockwise rotation of the back cover interlocking lever 3 is caused by the winding limit lever 9 which comes into contact with a pin 12 planted on the back cover interlock lever 3 by the force of the spring 2.
is rotated clockwise against the force of the spring 6, and the winding limiting lever 9 is disengaged from the groove 11a of the winding limiting cam 11. The counterclockwise rotation of the back cover interlocking lever 3 is further controlled by the counter detent pawl 1 which is negatively biased by the counter catch wheel 15 by springs 13 and 14.
6. Move the counter feed claw 17 to the counter feed wheel 1 using the pin 18 installed on the back cover interlocking lever 3.
Leave from 5. The counter disk 20 is rotated counterclockwise by the counter return spring 19, and the end surface 2 of the idle feed cam 21 is fixed integrally with the counter hit wheel 15 and the counter disk 20 by the shaft 22.
1a comes into contact with the winding limit lever 9a, completing the return.

The tip of the film 23 is inserted into the groove 24a of the spool 24.
, close the back cover 1, and press the push button 25 to turn on the push button switch 26. At this time, the winding completion switch 27 closes the back cover 1 because the projection 21b of the blank feed cam 21 is in contact with the projection 9b of the winding restriction lever 9 due to the clockwise rotation of the winding restriction lever 9 and the return of the counter disk 20. Even if it is closed, the winding limit lever 9 does not return to the state shown in the figure, and the winding completion switch 27 remains in the ON state. Therefore, the motor 28 starts rotating clockwise.

As shown in the second diagram, rotation of the motor shaft is transmitted to a pinion gear 29 fixed to the motor shaft. A pawl lever 142 supported by a shaft 143 mounted on the pinion gear 29 is negatively biased by a spring 147 against the outer periphery of a one-way clutch cam 144 . The clockwise rotation of the pinion gear 29 is caused by the engagement between the pawl lever 142 and the one-way clutch cam 144, which causes the one-way clutch cam 144 to rotate clockwise, and the one-way clutch cam 144 and the gear 146 integrally formed via the shaft 145 and the gear. 75 in the same direction.

Again, in FIG. 1, the rotation of the motor shaft is further transmitted to the second gear 30 that meshes with the gear 146, and the gear 31 formed integrally with the second gear 30.
The third gear 32 that meshes with the third gear 32 is rotated clockwise. The rotation of the third gear 32 is transmitted to the one-way clutch cam 34 via the shaft 33. Furthermore, clutch gear 3
A clutch gear 38 having a rotation axis concentric with the rotation axis 33 of the third gear 32 is rotated about a shaft 36 fixed to the third gear 32 via a pawl lever 37 which is negatively biased by a spring 35 to a one-way clutch cam 34. rotates clockwise together with the pawl lever 37. clutch gear 3
Spool gear 3 meshes with this by rotation of 8.
9 and sprocket gear 40 both rotate counterclockwise, and shaft 4 fixed to spool gear 39 rotates counterclockwise.
Since the spool 24 frictionally connected to the film 23 rotates counterclockwise, the film 23 is moved in the direction shown by the arrow.
wind up. A notched groove 40a is provided on the sprocket gear 40, into which a pin 43 fixed on the shaft 42 engages, and a pin 45 fixed on the shaft 42 engages with a vertical groove 44a of the sprocket 44. Therefore, the counterclockwise rotation of the sprocket gear 40 is transmitted to the sprocket 44, and the film 23
is transferred to the right (as shown by the arrow). Sprocket 4
4 is transmitted to a counter gear 47 that engages with a gear 46 formed integrally with the shaft 42, and swings the counter feed pawl 17 via an eccentric pin 48 implanted on the counter gear 47.

Since the back cover 1 is closed and the pin 18 has already been released from the counter detent pawl 16, the spring 13,
14, the counter detent pawl 16 and the counter feed pawl 17 come into contact with the counter hitch wheel 15,
The counter feed wheel 15 is rotated clockwise by the counter feed pawl 17 swinging in the left and right directions in the figure. The rotation of this counter-chatch wheel 15 is based on the axis 2.
2 to the idle feed cam 21, and when the idle feed cam 21 rotates by a certain rotation angle, the protrusion 21b is disengaged from the protrusion 9b, and the winding limit lever 9 is moved to the shaft 14.
9 in the counterclockwise direction, the protruding end 9c of the winding limiting lever 9 comes into contact with the outer periphery of the winding limiting cam 11. When the winding restriction cam 11 rotates counterclockwise and the notch groove 11a faces the tip 9c, the tip 9
c enters the groove 11a as shown in FIG. 1, and the pin 49 installed on the winding limit lever 9 turns off the winding completion switch 27 and the motor 28 stops rotating. This completes the film feed. Note that if the film that has been shot ends in the middle of winding and is to be rewound, the prong end 9c of the winding limit lever 9 is moved to the outer circumferential portion of the winding limit cam 11 other than the cutout groove 11a at the start of the above-mentioned blank feed operation. It is in contact with the In this case, the film length is equal to the amount defined by the film feed cam 21 and the protrusion 9b plus the film winding amount for which winding was not completed in the previous film.

Next, push button 25 again and switch 26 will turn on.
When turned on, the release magnet 52 configured as a combination magnet releases the movable piece of the control lever 53, so the control lever 53 moves counterclockwise around the shaft 90 due to the negative force of the spring 54. the locking lever 56 with the spring 6
It rotates clockwise against the negative force of 5. The rotation of the locking lever 56 about the shaft 57 moves the pin 59 implanted on the aperture control lever 58 by 5 notches.
Release the lock of 6a. Furthermore, the locking lever 5
The pin 60 installed on the pin 60 serves as a restriction for the aperture locking lever 62 which is negatively biased counterclockwise by a spring 61, so that the aperture lock can be locked by clockwise rotation of the locking lever 56. The lever 62 rotates clockwise to release a pin 64 implanted in an aperture lever 63 that works in conjunction with the aperture device to set its aperture. Note that the spring 65 is a spring for returning the locking lever 56 and is sufficiently weaker than the spring 54 of the control lever 53. When the pin 64 is released, the aperture lever 63 starts lowering due to the spring 66, and controls an aperture blade limiting lever of a lens-side aperture device (not shown).

On the other hand, the switch 26 is activated by pressing the push button 25.
When turned on, the aperture control magnet 67 turns on, attracts the movable piece of the aperture control lever 58, and the claw 5
At the same time as releasing the mesh between 8a and gear 70,
A photometry section (not shown) on the camera side starts measuring the intensity of light that has passed through the aperture aperture of the photographic lens. As the aperture lever 63 moves, the aperture aperture is gradually reduced from its open state, and when the photometric value of the passing light shows an appropriate value, the aperture control magnet 67 is turned off via the photometric circuit. Therefore, the movable piece of the aperture control lever 58 is released from suction, and the aperture control lever 58 rotates downward about the shaft 69 due to the negative force of the spring 68, and its claw portion 58a meshes with the outer peripheral teeth of the gear 70. The gears 70 to 74 constitute a governor, and the gear 74 fixed to the rotation shaft 75 of the aperture lever 63 rotates clockwise as the aperture lever 63 rotates, turning the governor final stage gear 70. , the claw portion 58a of the aperture control lever 58 is connected to the gear 70.
The rotation of the aperture lever 63 is prevented by the engagement of the aperture lever 63, and the aperture lever 63 is stopped at that position. The governor mechanism shown in the figure is configured to use gears 70 and 72 as flywheels to slow down the deflection speed of the aperture lever 63, but depending on the control conditions, a friction reduction mechanism using a torsion spring or the like may be used. There is no problem in adding it. Furthermore, since there is actually a delay between turning on the aperture control magnet 67 and when the aperture lever 63 starts operating, it is better to turn on the aperture control magnet 67 earlier by the delay.

In addition, a timer circuit is provided in which the motor 28 starts rotating after the time required for aperture control has passed after the push button 25 is pressed and the release magnet 52 is momentarily turned on (see Fig. 6). Set it up. When the motor 28 starts rotating clockwise, it rotates the shutter charge gear 76 counterclockwise, which meshes with the screw gear 75 formed integrally with the gear 146, and at the same time rotates the aperture charge gear 77 clockwise. The rotation of the aperture charge gear 77 is transmitted to the gear 79 via the shaft 78, and rotates the mirror gear 80 that meshes with the gear 79 in the counterclockwise direction. The mirror cam 82, which is fixed by the mirror gear 80 and the shaft 81, rotates in the counterclockwise direction to rotate the mirror 83, which had been in contact with the stopper 85 and tilted at 45 degrees on the photographing optical path, around the shaft 86. Center and raise via pin 84. The mirror switch 87 is activated by the protruding arm 83a when the mirror 83 finishes rising.
OFF, and the rotation of the motor 28 is stopped. In this case, if the mirror 83 is set to complete raising with 1/4 rotation of the mirror cam 82, and the rotation ratio of the mirror gear 80 and the third gear 32 is set to 1:4, the third gear 32 will cause the mirror 83 to rise. Complete one rotation. There is a control cam 89 integrally formed on the third gear 32, and one rotation of the control cam 89 moves the control lever 53, which comes into contact with the outer circumference of the cam, into the shaft 9.
0, the movable piece of the control lever 53 comes close to the release magnet 52, and is attracted to the release magnet 52, so that the control lever 53 is maintained in the state shown in FIG. Furthermore, the mirror cam 82 rotates 1/4, the mirror 83 rises, and the mirror switch 87 is activated.
The clutch cam 34 and pawl lever 3 are turned off the moment it is turned off.
7 are in mesh, the protruding part of the control cam 89 being formed on the opposite side of the control lever 53 . Clutch cam 34 and pawl lever 3
When 7 is engaged, the winding limit cam 1 is activated as described later.
1 cannot rotate while being restrained by the winding restriction lever 9, the sprocket gear 40, clutch gear 38, and pawl lever 37 also become unrotatable, and the clutch cam is not rotated by the pawl lever 37. is prevented. Therefore, the motor 28 also becomes unable to rotate, preventing the mirror cam 82 from overrunning, and the mirror 83 is reliably stopped at the raised position.

At the same time as the mirror switch 87 is turned OFF, a timer circuit (see FIG. 6) starts operating, and after a certain period of time has elapsed, starts the front and rear curtains (not shown) of the shutter 88. A rear curtain switch (not shown) is provided in the shutter 88 (see FIG. 6).
When the rear curtain switch is turned on in conjunction with the rear curtain running,
A timer circuit turns on the release magnet 52 momentarily after a certain period of time has elapsed, releasing the control lever 53. Therefore, again, the control lever 53 is rotated counterclockwise and the pin 55 disengages the pawl lever 37 from the one-way clutch cam 34. Therefore, the rotation interlocking device including the motor becomes rotatable again, and the motor 28 starts rotating at the same time as the release magnet 52 is momentarily turned on. The rotation of the motor 28 is started after the timer circuit is activated after the aforementioned trailing curtain switch is turned on.

The clockwise rotation of the screw gear 75 passes through the aperture charge gear 77, the intermediate gear 79, and the mirror gear 80, and reaches the mirror cam 82. Due to the counterclockwise rotation of the mirror cam 82, the mirror 83 follows the mirror cam 82 due to the negative force of the spring 91. descend. When the mirror lowering stroke is set to 1/4 rotation of the mirror cam 82, the third gear 32 rotates once, and the control lever 53
is again attracted to the release magnet 52 by contact with the control cam 89. 3rd stage during the mirror lowering process
During one rotation of the gear 32, the pawl lever 37 comes into contact with the outer periphery of the one-way clutch cam 34 after the pin 55 is disengaged, and when the mirror has finished lowering, it is reunited with the one-way clutch cam 34 in the state shown in the figure.

On the other hand, the shutter charge gear 76 rotates counterclockwise while the mirror is lowering, and the convex portion 8 of the cam 8
a comes into contact with the end 5a of the cam lever 5, and the cam lever 5 rotates clockwise about the shaft 7 against the spring 6. End portion 9d of winding limit lever 9
Since the spring 10 applies a negative force to the cam lever 5, the clockwise rotation of the cam lever 5 causes
The winding limit lever 9 rotates clockwise about the shaft 149 and rotates in the groove 11 of the winding limit cam 11.
The protruding end 9c separates from a, releasing the restraint of the hoisting restriction cam 11.

When the mirror lowering stroke is completed and the motor 28 continues to rotate with the pawl lever 37 reconnected to the one-way clutch cam 34, the clockwise rotation of the third gear 32 passes through the one-way clutch to the clutch gear 38.
As a result, the spool gear 39 and sprocket gear 40 are rotated counterclockwise, and the film 23 fed by the sprocket 44 is wound onto the spool 24, thereby winding the film. In this case, if the shape of the sprocket is set so that one rotation of the sprocket gear 40 feeds the film equivalent to one screen, and the ratio of the number of teeth between the clutch gear 38 and the sprocket gear 40 is set to 1:2, the clutch gear 38
When the sprocket gear 40 rotates twice, the sprocket gear 40 rotates once and transfers one frame of film. clutch gear 3
8 rotates twice, that is, the one-way clutch
During rotation, the release magnet 52 is not turned on, so the one-way clutches 34 and 37 will not be disengaged. The cam lever 5 returns after the sprocket gear 40 has rotated slightly.
If the phase of the sprocket gear 40 is determined, rotation of the sprocket gear 40 will not be hindered. When the clutch gear 38 rotates twice and the groove 11a of the limit cam 11 again faces the tip 9c of the winding limit lever 9, the tip 9c moves into the groove 1.
Enter 1a again. As the tip 9c reenters the groove 11a, the winding completion switch 27, which had been turned on until then, is turned off, so the motor stops and the winding is completed.

Charging of the shutter 88 is performed by counterclockwise rotation of the shutter charge gear 76 from the mirror lowering stroke to the middle of the film winding stroke, that is, during the second and third rotations of the one-way clutches 34 and 37 (Fig. 6). reference). The rotation of the shutter charge gear 76 is transmitted to the cam 8 , and a charge lever 95 is connected via a shaft 94 to the other end of an arm 93 rotatably supported on an eccentric shaft 92 implanted on the cam 8 . ing. Shaft 94 and arm 93 or lever 9
5 is configured to be rotatable. The rotation of the cam 8 causes the arm 93 to perform a swinging motion, moving the charge lever 95 up and down to perform shutter charging. The return of the aperture lever 63 and the aperture control lever 58 is similar to the shutter charge, in which the one-way clutch portion, that is, the third gear 32 is
This occurs during the rotation process (see Figure 6). The clockwise rotation of the aperture charge gear 77 is transmitted to the aperture lever cam 96 via the shaft 78, which further rotates the gear 79 fixed to the shaft 78, and the idle gear 97,
The aperture control lever cam 100 is rotated clockwise via the gear 98. During the second and third rotations of the third gear 32, the aperture control lever cam 100 rotates the outer periphery of the pin 5.
9 and disengages the claw portion 58a of the aperture control lever 58 from the gear 70. Further thereafter, the aperture lever cam 96 comes into contact with the pin 101 implanted in the aperture lever 63, and the aperture lever 63 returns upwardly in the counterclockwise direction about the shaft 75. At this time, the control lever 53 returns clockwise around the shaft 90 due to contact with the control lever 53 during the second rotation of the third gear 32, and is attracted to the release magnet 52. The aperture lever 63 and the aperture control lever 58, which are raised by the clockwise rotation of the aperture lever cam 96 and the aperture control lever cam 100, are raised by the rising of the pins 59 and 64, respectively. The springs 65 and 61 keep the locking in place. The leaf spring 67a reliably moves the movable piece of the aperture control lever 58 to the aperture control magnet 6.
This is a negative spring for making contact with 7. Furthermore, during the fourth rotation of the third gear 32 during film winding, the aperture lever cam 96 and the aperture control lever cam 100 continue to rotate, and the aperture lever cam 96 and the aperture control lever cam 100 continue to rotate, and the aperture lever cam 96 and the aperture control lever cam 100 move out of the rotational range of the aperture lever 63 and the aperture control lever 58, respectively, until the winding of one frame of film is completed. leave completely. This completes a series of normal photographing steps, from release by pressing the push button, aperture control, mirror raising, shutter operation, mirror lowering, aperture and shutter charging, and film winding. Photographing is carried out one after another, and when all the films have been wound, it becomes impossible to pull out the films from the cartridge, and the rotation of the sprocket is prevented. In this case, it is desirable to provide a slip mechanism between the motor shaft and pinion gear 29 to protect the motor and film.

Next, the film rewinding process will be explained. When the rewind button 102 is pressed against the spring 113, the tip 11 of the lever 115 is attached to the tip of the shaft 103.
A flange 114 is provided which abuts 5a. As the shaft 103 descends, the lever 115 rotates clockwise about the shaft 117 against the negative force of the spring 116, and the pin 118 fixed at the tip of the lever 115 engages the flange groove 42a of the sprocket shaft 42. Since it is engaged with the sprocket shaft 42
is raised, the pin 43 fixed to the sprocket shaft 42 separates from the notch 40a of the sprocket gear 40, and the connection between the sprocket gear 40 and the sprocket 44 is broken. Furthermore, the clockwise rotation of the lever 115 switches the rewind switch 119 to the rewind side, and the motor 28 begins to rotate counterclockwise, that is, in the opposite direction to that at the time of photographing. The rotation of the pinion gear 29 is controlled by the rewinding gear 120 via a gear train (not shown).
and rotates the rewind gear 120 clockwise. When the second rewind button 51 is pressed, the lever 106, which is biased downward by the spring 107 around the shaft 105, rotates clockwise, and the pin 108 implanted at the tip of the lever 106 moves toward the shaft 109. groove 109
a, the shaft 109 is raised, and the pin 110 fixed on the shaft 109 is engaged with the groove 112a of the sleeve 112 formed integrally with the rewind pulley 111. The clockwise rotation of the rewind gear 120 is transmitted to a pin 121 fixed on the shaft 109 that engages a groove 120a of a sleeve integrally formed on the rewind gear 120, causing the shaft 109 to rotate clockwise. The rotation of the shaft 109 is transmitted to the unwinding pulley 111 through the engagement of the pin 110 and the groove 112a, and via the belt 122 rotates the unwinding fork pulley 123 in the clockwise direction. Fork 12 integrally formed with unwinding fork pulley 123
4 engages with a spool shaft of a film cartridge (not shown), and the film 23 is rewound by clockwise rotation of the fork 124. During film rewinding, the claw lever 142 and one-way clutch cam 144 in FIG. 2 are disengaged, so the rotation of the motor 28 is not transmitted to the gear 146 and the screw gear 75. Therefore, rotation is not transmitted to the winding system, shutter charge, and aperture charge system.

Next, the operation and operation of multiple photography will be explained.

The multiple knob 125 is connected to a lever 127 by a shaft 126.
The lever 127 rotates about a shaft 128. Spring 129 with multiple knob 125
If you move it downward in the figure against the force, lever 127
The pin 130 implanted at the tip of the pin 130 rotates clockwise about the shaft 128. A lever 131 is rotatably supported on the shaft 128.
Spring 132 provided between 27 and lever 131
Since the two are connected by the lever 127
As a result of this rotation, the lever 131 can be rotated clockwise until it comes into contact with the pin 130. Lever 13
1, the tip of the lever 131 comes into contact with the cam surface of the cam 50. Further, as the lever 127 rotates, the pin 133 implanted in the lever 127 rotates the locking lever 134 clockwise against the spring 135 while contacting the slope of the distal end of the locking lever 134. It is locked in a notch 134a of the stop lever 134. This completes the multiplex shooting setup.
Even if the photographer releases his/her hand from the multiple lever 125 after that, the lever 127 does not return due to the engagement between the pin 133 and the notch 134a of the locking lever 134. Next, when the push button 25 is pressed, the aforementioned steps, ie, diaphragm control, mirror raising, shutter operation, and mirror lowering operations proceed. At this time, in the case of normal shooting, the winding limit lever 9
The cam lever 5 rotates clockwise due to the contact between the protrusion of the cam 8 and the cam lever 5, and the winding limit lever 9 rotates clockwise around the shaft 149 due to the negative force of the spring 10, thereby limiting the winding. The protruding end 9c of the lever 9 disengages from the groove 11a of the limiting cam 11 to enable rotation of the sprocket gear 40, but when multiple photography is set, the distal end 127a of the lever 127 prevents the clockwise rotation of the lever 127. Due to the movement, the cam 8 comes into contact with the end surface of the winding limit lever 9, and the cam 8
The cam lever 5 comes into contact with the convex part of the cam lever 5.
Even if the winding limit lever 9 rotates clockwise,
is prevented from rotating clockwise. Furthermore, during the second rotation of the third gear 32, the tip of the lever 131 shifts contact from the convex part to the flat part of the cam 50, so the lever 131 rotates clockwise about the shaft 128 due to the negative force of the central spring 132. do. The clockwise rotation of the lever 131 causes the lever 137, which is negatively biased by the spring 136, to rotate counterclockwise about the shaft 138.
The pin 139 implanted on the lever 137 comes into contact with the end surface of the pawl lever 37, and the pawl lever 37 disengages from the one-way clutch cam 34. In the above state, the film 23 is not wound up during the third and fourth rotations of the third gear 32. Just before the end of the fourth rotation of the third gear 32, the lever 131 contacts the recessed portion of the cam 50, and the lever 131 further rotates clockwise. When the lever 131 rotates,
The tip 131a of the lever 131 is a locking lever 134
The locking lever 134 is rotated clockwise. Therefore, the pin 133 that was locked in the notch 134a of the locking lever 134 is released from the lock, and the lever 127 is rotated counterclockwise by the negative force of the spring 129, thereby canceling the multiple photography setting. The rotation of the lever 127 is caused by the contact of the pin 140 installed on the lever 127, which causes the multiplex switch 1 to rotate.
41 is turned off, and the motor 28 is stopped. Next, when the push button is pressed, aperture control, mirror raising, and shutter operation are carried out again, but since the film 23 has not been wound up since the previous shooting, multiple shooting is performed. The lever 150 is a reverse rotation prevention pawl, and is in contact with the spool gear 39 with a spring 151 rotating about a shaft 152 in order to prevent the spool gear 39 from rotating in the reverse direction due to the curling force of the film. Therefore, the spool gear 39 is allowed to rotate counterclockwise, but is prevented from rotating clockwise. Even if the clockwise rotation of the spool gear 39 is prevented, the shaft 4
Since a slip mechanism is provided between the spool 1 and the spool 24, the spool 24 does not become unable to rotate clockwise during film rewinding.

FIG. 3 shows another embodiment of the gear interlocking means shown in FIG. The clockwise rotation of the motor 28 is transmitted to the pinion gear 29 ¹ fixed to the motor shaft, which rotates the second gear 30 that meshes with the pinion gear 29 ¹ counterclockwise. Gear 31 is on the second gear 30
is integrally formed and meshes with the third gear 32 ¹ , so the third gear 32 ¹ rotates in the same clockwise direction as the motor 28 . As in FIG. ¹ of the first embodiment, this rotation of the third gear 321 is transmitted to the one-way clutch cam 34 via the shaft 33, and the engagement of the one-way clutch cam 34 and the pawl lever 37 causes the clutch gear 38 to move clockwise. It rotates and transmits the rotation to the winding spool 24 and sprocket 44 shown in the first diagram. In FIG. 3, a shaft 33 ¹ is further installed on the third gear 32 ¹ , and the clockwise rotation of the third gear 32 ¹ is transmitted to the one-way clutch cam 161 . This one-way clutch cam 161 has a pawl lever 160 attached to the spring 16.
2, when the third gear ³²¹ rotates clockwise, the one-way clutch cam 161
The pawl lever 160 engages with the pawl lever 160, and the shaft 163 implanted in the flange portion of the screw gear ⁷⁵¹ is engaged with the pawl lever 160.
Since the screw gear 75 is rotatably supported on the
¹ rotates clockwise. The screw gear 75 ¹ has the first
As in the embodiment, the shutter charge gear 76 and the aperture charge gear 77 are engaged with each other, and the shutter charge gear 76 is rotated counterclockwise and the aperture charge gear ⁷⁷¹ is rotated clockwise. Here the third
If each gear is set so that the rotation ratio between the gear ³²¹ , the shutter charge gear 76, and the aperture charge gear 77 is 4:1, the photographing operation is the same as in the first embodiment shown in FIG. 1, that is, the aperture control mirror is raised. A series of normal photographing steps are performed, including shutter operation, mirror lowering, and film winding.

Next, rewinding in the second embodiment shown in FIG. 3 will be explained.

As in the first embodiment shown in FIG. 1, when the rewind button 102 is pressed and the contacts of the changeover switch 119 are switched and the motor 28 starts rotating counterclockwise, the third gear ³²¹ rotates counterclockwise. Therefore, the one-way clutch cams 34, 161 are disengaged from the pawl levers 37, 160, respectively. Therefore, the clutch gear 38 and screw gear ⁷⁵¹ do not rotate, and the rotation of the motor 28 is not transmitted to the shutter, aperture system, and film winding system. On the other hand, the counterclockwise rotation of the third gear ³²¹ rotates the rewind gear 120 clockwise, and the second rewind button 51 is rotated as in the first embodiment.
(See Figure 1), the shaft 109 slides upward and the pin 110 is inserted into the groove 112a of the sleeve 112.
The rotation of the gear 120 is caused by the unwinding pulley 11 formed integrally with the sleeve 112.
1, the spool shaft of the film cassette is rotated via the belt 122 and the unwinding fork pulley 123, and the film is wound.

In the second embodiment shown in FIG. 3, parts of the reduction gear train 30, 31 ^{, 321} used during winding are also used during rewinding, so the number of parts is smaller than that of the first embodiment. Since the structure is simplified, costs are reduced and space is required.

FIG. 4 is a third embodiment showing the rewind operation portion of FIG. 1. In the first embodiment (Fig. 1),
The rewind operation is performed by pressing the rewind button 102 and then the second rewind button ^51. In the third embodiment shown in FIG. 115, and the movement of the lever 115 frees the sprocket 44 (see FIG. 1) from the winding interlocking system, switches the rewind switch 119, and reverses the motor 28. Next, when the rewind knob 125 ¹ is slid to the left in the figure, the sliding plate 170 fixed to the rewind knob 125 ¹ rotates the lever 106 ¹ clockwise about the shaft 105, and the lever 106 ¹ The rotating shaft 109 is raised through the groove 109a in which the pin 108 fixed to the tip of the rewind gear 12 is engaged.
0 and rewind pulley 111. Rewind 1
20 is connected to the motor 28 via a gear train as in FIG. 1 or 3, so the motor 28
The counterclockwise rotation causes the rewind gear 120 to rotate clockwise, and the rotation of the rewind pulley 111 in the same direction is transmitted to the rewind fork via the belt 122 to rewind the film.

In FIG. 1, the photographer must press both the rewind button and the second rewind button when rewinding, but in the embodiment shown in FIG.
When the rewind knob 125 ¹ is slid by pressing 02 ¹ , the large diameter portion 103 ¹ a of the shaft 103 ¹ is connected to the sliding plate 170.
Since the shaft 103 1 engages with a long groove 170 a that descends downward from the flat surface of the shaft 103 ¹ and has a width narrower than the diameter of the large diameter portion 103 ^{1 a} , the shaft 103 ¹ is prevented from rising by the spring 113. Therefore, the flange 114 and the lever 11
The rotation of the lever 115 and the switching of the rewind switch 119 due to the contact of the lever 5 are maintained, and the photographer only needs to hold the rewind knob ¹²⁵¹ . In addition, in FIG. 4, the rewind button 102 ¹ and the rewind knob 125 ¹ are close to each other, so the photographer can first press the rewind button 102 ¹ with his thumb and then slide the rewind knob 125 ¹ . , it is possible to rewind with one hand. Also, the rewind knob 125 ¹ is the rewind button 10
2 It does not slide until after pressing ¹ , so there are no accidents caused by incorrect operation.

FIG. 5 is a block diagram of an electric circuit in an embodiment of the present invention, and FIG. 6 is a mode diagram in a general photographing process. In FIGS. 5 and 6, when the release switch 26 is turned ON, the release magnet drive section 202 is turned ON by the pulse generated by the monostable multivibrator 201 (hereinafter abbreviated as "M, M"), and the release magnet is activated. 52 turns on for a moment. Further, the M and M pulses activate the timer 203, and after a certain period of time, the motor drive circuit 204 is turned on, and the motor 28 starts rotating.
When the photometry circuit 205 detects an appropriate amount of light while the timer 203 is operating, the aperture control magnet 67 is activated.
The aperture control lever 58 turns OFF (see Figure 1).
is opened and locks the aperture control mechanisms 70-74.
The rotation of the motor 28 is stopped when the mirror is raised and the mirror switch 84 is turned OFF, and the motor drive circuit 204 is turned OFF. When the shutter operates and the rear curtain switch 206 is turned on, the timer 2
03 operates for a certain period of time different from the above-mentioned time, and then turns on the motor drive circuit 204. The motor 28 starts rotating again and the winding completion switch 2 is activated.
Continue rotating until 7 turns OFF. Rewind switch 119 is a changeover switch, and when it is connected to contact F, the motor rotates in the normal direction to perform the normal photographing process, and when it is connected to contact R, the motor rotates in the reverse direction to perform film rewinding. Mirror switch 8
4. Rewind switch 119, winding completion switch 2
7 and the multiplex photographing switch 141 are both connected to a motor drive circuit, and reference numeral 208 is a power supply section.

As described above, according to the present invention, a series of normal photographing steps from release to completion of film winding are performed by one motor rotating in one direction, and when one frame of film has been fed, film feeding is stopped. By appropriately setting the timing for releasing the locking member and the timing for locking and disengaging the clutch that transmits the driving force to the film feeding mechanism, the member that locks the film feeding can be released before exposure. Since it can also be used to limit the mechanism that operates, an extremely high-speed electric drive device can be obtained with a simple structure.

In the embodiments of the present invention, the optical system operation mechanism that operates before the shutter operation is exemplified by the elevating mirror of a single-lens reflex camera, but the first rotation performed before the exposure operation of the interlocking means an automatic diaphragm mechanism in which the aperture is stopped down to a predetermined aperture value and then opened to the maximum aperture by a second rotation after the shutter is operated, or the lens is displaced to one side along the optical axis by the first rotation. and focus on the second
It may be an autofocus mechanism that returns the lens to its original position by rotating the lens. Further, according to the present invention, since the entire photographing process is normally performed by rotating the motor in one direction, it is also possible to add a mechanism for setting film sensitivity, etc. by rotating the motor in the opposite direction before starting photographing. .

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment based on the present invention, FIG.
3 is a perspective view showing another embodiment of the gear interlocking mechanism shown in FIG. 1, and FIG. 4 is an enlarged view of the motor shaft shown in FIG. FIG. 5 is an electric circuit block diagram of the embodiment shown in FIG. 1, and FIG. 6 is a mode diagram of the embodiment shown in FIG. 1. 5, 8, 9, 9c...Locking means, 11, 24,
38-46...Film feeding means, 28...Motor, 29-33, 75, 77-82...Interlocking means, 34-37...Clutching means, 52-55...
...Clutch control means, 83-86...Optical system operating mechanism.

Claims (1)

[Scope of Claims] 1 a motor, and a first motor chronologically linked to the rotation of the motor;
interlocking means for performing one-way rotation for actuation, second actuation, and third actuation; and interlocking means that is interlocked with the interlocking means to raise the mirror with the rotation for the first actuation and to raise the mirror with the rotation for the second actuation. A mirror operating mechanism that lowers the mirror and stops the operation of the mirror during the third operating rotation, a film feeding means for feeding the film, and a clutch capable of connecting the interlocking means and the film feeding means. means for releasing the connection between the interlocking means and the film feeding means when the rotation for the first operation is started, and connecting the interlocking means and the film feeding means when the rotation for the first operation is completed; , at least when the rotation for the second operation starts, the interlocking means and the film feeding means are disconnected, and when the rotation for the second operation is completed, the interlocking means and the film feeding means are connected. a control means for controlling the clutch means so as to transmit rotation for the third actuation to the film feeding means; and a control means capable of locking the film feeding means, at least upon completion of the rotation for the first actuation. The film feeding means is locked, and the lock is released when the rotation for the second operation is completed, and when the film feeding means feeds the film by one frame by the rotation for the third operation, a locking means for relocking the film feeding means and maintaining the locked state; An electric drive device for a camera, wherein the locking means locks the mirror operating mechanism to maintain the mirror in a raised position.