JPH0731345B2 - Motor drive camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a motor drive camera, more specifically, a film winding by a single motor housed in a camera body,
The present invention relates to a motor drive camera that automatically performs shutter charge, aperture control, mirror up, and film rewinding drive.

[Prior Art] Conventionally, a motor drive camera in which a motor is housed in a camera body and the camera is automatically operated by driving the motor is disclosed in Japanese Patent Publication No. 36-12928 and Japanese Patent Publication No.
1-36426, Japanese Patent Publication No. 60-26203, Japanese Patent Publication No. 60-2
It is already well known from Japanese Patent No. 8332, etc. In this case, one motor is used for film winding, shutter charging, and film rewinding, and another motor is used for raising and lowering the movable mirror and controlling the diaphragm, or a total of two motors are used. The means for performing each operation by utilizing the forward and reverse rotation of the motor is adopted.

[Problems to be Solved by the Invention] However, in the case of controlling with two conventional motors, it is necessary to provide a control means for each of the motors, which not only increases the electrical equipment and motor costs but also requires space. Because there are many disadvantages.

In addition, when using the forward and reverse rotation of one motor, it is necessary to use many clutches for switching the drive system, especially when using the clutch of the planetary gear mechanism by connecting each drive system with a gear train. Since the clutch is automatically switched only in two directions, the forward rotation direction and the reverse rotation direction of the motor, for example, film winding and shutter charging are performed by switching the forward rotation direction of the motor, and aperture control and mirror drive are performed. If the motor is switched in the reverse direction, the film rewinding system must manually control the clutch. Therefore, there is a possibility that a completely different motor has to be provided for film rewinding, and some means must be provided here in order to perform all driving with one motor.

The present invention has been made in view of the above points, and an object of the present invention is to provide a motor drive camera in which all driving is performed by one motor.

[Means and Actions for Solving Problems] According to the present invention, the rotation of one motor built in the camera body is sequentially time-sequentially via a planetary gear clutch mechanism and a stop lever that constrains the planetary gear of the mechanism. So that the normal rotation of the motor is transmitted to the drive system such as film winding, shutter charge, aperture control and mirror up, and the reverse rotation is transmitted to the film rewinding drive system. It is the one.

[Embodiment] A motor drive camera of the present invention will be described below with reference to an embodiment.

The present embodiment is a case where the present invention is applied to a single-lens reflex camera, and the rotational force at the time of normal rotation of the motor is (1) a drive system for film winding and shutter charging (2) diaphragm Drive system that performs automatic control and mirror up (3) Sequentially transmitted to the drive system that performs shutter release, and rotational force during reverse rotation of the motor is (4) transmitted to the drive system that rewinds the film. ing.

FIG. 1 is a sectional view of a drive system showing each drive transmission system in the camera of the present invention. One driving motor M is housed in the film winding spool 1, and the motor M
The rotation of the output shaft Ma is transmitted to the sun gear 8, which is an output gear, via a two-stage planetary gear mechanism.
That is, the first sun gear 2 is fixed to the output shaft Ma, the first planetary gear 3 is engaged with the sun gear 2, and the center rotation shaft of the carrier 4 of the planetary gear 3 is the output shaft Ma. A second sun gear 5 is fixed to the carrier 4 coaxially with and a second planetary gear 6 is meshed with the gear 5. The center rotation shaft of the carrier 7 of the planetary gear 6 is coaxial with the output shaft Ma, and the third sun gear 8 is fixed to the drive shaft 7a. Therefore, the rotational force greatly reduced by the two-stage planetary gear mechanism is transmitted to the sun gear 8. The sun gear 8 serves as an output gear, and a planetary gear 9 is further rotatably supported by a carrier arm 10 via a friction for controlling the attitude of the carrier and meshes with the gear. Further, an internal gear 11 which is engaged with the planetary gears 3 and 6 when the planetary gears 3 and 6 revolve is arranged around the two-stage planetary gear mechanism.

A support shaft 12 fixedly fixed to the carrier arm 10 and rotatably holding the planetary gear 9 extends upward, and the support shaft 12 extends on the orbit O of the planetary gear 9 (see FIG. 2). The rotation force is transmitted from the planetary gear 9 to each drive system by being restrained at a proper position by a stopper arm which will be described later.

Among the above-mentioned drive systems, the film winding drive system and the film rewinding drive system are configured such that power is switched and transmitted by a planetary gear clutch mechanism, and the planetary gear 9 is transmitted by the clutch mechanism. It engages with gear 13 in a timely manner. Clutch gears 14 and 15 are meshed with the transmission gear 13, and the clutch gear 14 meshes with the one-turn gear 16 during film winding.
Rotate the lower sprocket gear 17, which meshes with 16, by one frame. When this gear 17 rotates, the sprocket shaft 18
Thus, the sprocket 19 rotates, the sprocket upper gear 20 also rotates, the spool gear 22 rotates via the idle gear 21 meshing with the gear 20, and the film winding spool 1 rotates via the friction spring 23. Next, when the film is rewound, the clutch gear 15 meshes with the rewind transmission gear 24, and the gears 25, 26, 27, 28a, 2
Rewinding gear 30 through a gear train consisting of 8b and 29
Is driven to rotate the fork member 31 fitted to the film shaft in the film cartridge (not shown) to rewind the film. The gears 28a and 28b are connected shafts.
Are joined by 28. When the film is rewound, the sprocket shaft 18
Is raised, and a sprocket shaft locking mechanism, which will be described later, holds the sprocket shaft 18 at the raised position so that the transmission of the rotational force to the film winding drive system is also cut off. That is, when the rewind button 32 is pushed against the return spring 33 to raise the sprocket shaft 18, the coupling member 35 is fixed coaxially and is fitted into the fitting hole 19a of the sprocket 19 by the elastic force of the spring 34. Also rises and disconnects from the sprocket 19, and the gear 20 fixed to the sprocket shaft 18 also rises, so the gear 20 and the idle gear 21
The connection with is also cut off. Therefore, the sprocket 19 and the spool 1 are free, and the film can be smoothly rewound. The lower part of the sprocket shaft 18 and the lower gear 17 are connected to each other because the connecting shaft part to the lower gear 17 of the sprocket shaft 18 is formed into an oval cross section, and the sprocket shaft 18 can move in the axial direction. Only the rotation of is transmitted to the shaft 18.

Next, power is transmitted to the automatic diaphragm control drive system by the planet gear 9 revolving and engaging with the diaphragm drive gear 36. An idle gear 37 is engaged with the gear 36, a gear 38 is engaged with the gear 37, and a gear 39 is engaged with the gear 38. The gear 39 is formed of a spur gear, and a bevel gear 40 is integrally attached to the gear 39, and a bevel gear 41 (see FIG. 2) is engaged with the bevel gear 40. This bevel gear 41
A spur gear 42 is integrally attached to the gear, and a connecting gear 43b is engaged with the gear 42. The gear 43b transmits a rotational force to the aperture gear 43a via a clutch shaft 43 (see FIG. 2) of a slip clutch (not shown). The diaphragm gear 43a meshes with a gear 44a formed on the outer circumference of the diaphragm drive ring 44. A pinion 45 is engaged with the gear 44a. The pinion 45 is designed to rotate the large diameter gear 46 for the governor.
46 further rotates the governor gear 47. A ratchet wheel 48 is integrally attached to the gear 47. A ratchet 49a of a ratchet lever 49 engages with and disengages from the ratchet wheel 48. The ratchet lever 49 is formed by an inverted L-shaped lever, the ratchet 49a is formed at one arm end thereof, and the other arm end thereof extends downward and is positioned near a restraining lever 71 described later. (See Figure 2). This ratchet lever 49 has a magnet attracting member 50 attached to one arm end thereof, and in normal use, this attracting member 50 is a release type electromagnet 5.
1, that is, it is attracted to the repulsive power supply type magnet. When the diaphragm drive ring 44 is rotated and the diaphragm aperture is narrowed by a diaphragm blade (not shown) to reach an appropriate diaphragm value, the electromagnet 51 is energized, the attracting member 50 repels, and the ratchet lever 49 rotates. The ratchet 49a moves to lock the ratchet wheel 48 and stop the rotation of the diaphragm drive ring 44 to obtain an appropriate diaphragm opening.

When the diaphragm drive ring 44 is stopped, the transmission of the rotational force of the gear 43b to the gear 43a is slipped by the above-mentioned slip clutch (not shown). Further, as this slip clutch, a clutch that escapes by the stop force of the diaphragm drive ring 44 may be used, and when this escape clutch is used, the self-recovering spring may self-recover when the diaphragm is opened.

The automatic diaphragm control is driven in this manner, and the mirror-up operation is performed in connection with this operation. That is, a cam 52 for mirror up (see FIG. 2) is integrally provided on the rear surface of the spur gear 42, and a mirror up lever (not shown) is operated in accordance with the rotation of the gear 42 to move the mirror up. Is designed to do. In addition, the diaphragm drive ring 44
The diaphragm mechanism including the above and the mirror up lever and the like are configured to self-return to the mirror down position and the diaphragm open position after the end of photographing by the elastic force of a return spring (not shown).

Next, the details of each drive system will be described with reference to the plan view of FIG.
I will explain it in a little more detail now.

The state shown in FIG. 2 shows a state in which the film winding is completed and the shutter is charged, waiting for the release. In this state, the planetary gear 9 that meshes with the sun gear 8 that is an output gear is in a position that meshes with the transmission gear 13 of the planetary gear clutch mechanism, and the support shaft 12 thereof is restrained by the first stop arm 53. This stop arm 53
Has a base rotatably attached to a support shaft 54, and a notch 53c having two tiered inclined edges 53a, 53b at one side edge near the tip thereof.
Is provided. This stop arm 53 is the cutout
The extension spring 5 is attached to the arm 53d extending from the lower edge of the planet gear 9 so that the 53c is positioned on the revolution path O of the support shaft 12 of the planetary gear 9.
A habit of turning counterclockwise around the support shaft 54 by giving 5 is given. Then, this rotation is caused by the cutout 53.
The stop pin 56 regulates c so that it is located on the orbit O. In addition, the arm 53d is a winding detection switch S
It is designed to open and close W1. That is, when the film is wound up (see FIG. 5), the support shaft 12 is inserted into the notch 53c of the stop arm 53 at a position where it comes into contact with the second slanted edge 53b. Although it rotates counterclockwise to the position where it abuts against, and the winding detection switch SW1 is opened, overload due to winding is applied when the film winding of one frame is completed, and the planet gear 9 has its support shaft 12 It slightly rotates to the position where it moves from the second inclined edge 53b to the first inclined edge 53a. When this rotates, the stop arm 53 rotates clockwise around the support shaft 54 as shown in FIG.
Closes the hoist detection switch SW1, which causes the motor M
Stop rotating.

Further, the transmission gear 13 in engagement with the planetary gear 9 is rotatably supported by the immovable support shaft 57, and a dogleg-shaped carrier lever 58 is pivotally attached to the coaxial 57 so as to pivot about the fulcrum in the middle thereof. It is worn. The clutch gear 14 that meshes with the transmission gear 13 is held by a spindle on one arm of the carrier lever 58, and the clutch gear 15 that meshes with the transmission gear 13 is held by a spindle on the other arm. This clutch gear 15 is a gear that meshes with the above transmission gear 13.
It is composed of a two-stage gear 15a and a gear 15b which meshes with the rewind transmission gear 24 by switching the clutch when the film is rewound. The planetary gear clutch mechanism configured as described above has a transmission gear when the motor M rotates forward.
Since 13 rotates counterclockwise about the support shaft 57, the clutch gears 14 and 15 rotate counterclockwise around the transmission gear 13, which is the sun gear, and the clutch gear 14 meshes with the one-turn gear 16. . When the motor M rotates in the reverse direction during film rewinding, the transmission gear 13 rotates in the clockwise direction, whereby the clutch is switched and the clutch gears 14 and 15 are rotated in the clockwise direction around the transmission gear 13, and the clutch gear 15b. Engage with the rewinding transmission gear 24.

In the one-turn gear 16 that meshes with the clutch gear 14,
A notch disk 59 for controlling one rotation of the gear and a shutter charge cam 60 having a gradually opening actuating cam edge whose radius from the center gradually increases are coaxially and integrally attached. The one arm end 61a of the winding stop lever 61 is fitted into the cutout 59a of the cutout disk 59. The winding stop lever 61 is rotatably attached to a support shaft at its fulcrum, and the other arm 61b having a bulge at the end extends over one arm of the locking lever 62. The winding stop lever 61 has the habit of rotating counterclockwise around the support shaft by the elastic force of the coil spring 63 applied to the other arm 61b.
Is fitted in the notch 59a. The locking lever 62 has a fulcrum pivotally attached to a support shaft so that the one arm end extending upward has the other arm 61 of the winding stop lever 61.
A pin 64 for pushing b is planted. The other arm 62a extending downward (in FIG. 2) is connected to one arm 65a of the shutter charge lever 65 by a coil spring 66, and the other arm 62a pulled by the spring 66 is connected to the one arm 65a. The locking lever 62 is prevented from rotating in the clockwise direction by coming into contact with the fixed cam sliding contact pin 67. Further, the shutter charge lever 65 is the other arm 65b.
Although it is pulled by a spring 68, it is given the habit of rotating clockwise around the support shaft, but when the film is wound in the shutter charged state, it is fixed to the end of the other arm 65b. The locking pin 70a at one end of the blocking lever 70 is engaged with the cylindrical pin 69 to prevent the rotation thereof. In this state, the locking portion 62b formed so as to project rightward (in FIG. 2) from the middle of the locking lever 62 faces the hook 71a of the restraining lever 71 with a slight gap. ing. Although the restraint lever 71 has a tendency to rotate clockwise around a support shaft by a spring 72, the hook 71a is stopped by a stopper pin 73 at a position facing the locking portion 62b.

The locking lever 62 is a spring when the diaphragm is closed and the mirror is raised at the time of photographing, and when the rotation of the shutter charge lever 65 is allowed by the operation of the drive arm 80 described later.
Due to the elastic force of 66, the locking portion 62b is restrained at a position where it is locked to the hook 71a by rotating slightly clockwise around the support shaft. The hook 71a is formed on one arm end of the restraint lever 71, and is pushed by the other arm end by a set member described later to rotate the restraint lever 71 counterclockwise against its own habit. Pin 74 is fixedly planted. Also, the above blocking lever
The spring 70 has a habit of rotating clockwise around a support shaft by a spring 75, and is stopped by a stopper pin 76 at a position where its locking claw 70a is locked to the semi-cylindrical pin 69.
A pin 78 planted at one arm end of a bell crank-shaped linking lever 77 is in pressure contact with the other arm 70b of the blocking lever 70,
The other arm end 77a of the linkage lever 77 is in pressure contact with the tip of a drive arm 80, which will be described later.

The focal plane shutter used in the present embodiment is a vertical traveling type focal plane shutter, and the opening and closing operations thereof are each performed by a magnet (not shown). The charging operation of the lever 65 locks the shutter until just before the exposure so as to prevent an unexpected burst operation of the shutter due to vibration or the like. However, it goes without saying that the shutter charge lever 65 may directly operate the charge member of the shutter.

The support shaft 12 of the planetary gear 9 is connected to the first stop arm 53.
The inclined notch 81a at the tip of the second stop arm 81 is positioned on the revolution orbit O at the next operating position after being moved away from the revolution orbit O. The second stop arm 81 has a fulcrum pivotally attached to a support shaft 79, and the rear extension arm 81b is pulled by a spring 82 to rotate clockwise around the support shaft 79. Although the notch 81a is given, the orbit O of the support shaft 12 of the planetary gear 9 is revolved.
The rotation of the arm 81 is blocked by a stopper pin 83 so that the arm 81 stops at a position to be arranged above. When the support shaft 12 is prevented from revolving by the notch 81a of the second stop arm 81 and is stopped at the same position, the planet gear 9 meshes with the diaphragm drive gear 36 described above, and the automatic diaphragm control drive system. Transmits power to. This diaphragm drive system is composed of a gear train composed of the gears 36 to 42, 43a, 43b and 44a as described above. Further, the spur gear 39 and the bevel gear 40 are integrated, and a stopper pin 84 is planted on the back surface thereof. The pin 84 serves to regulate the rotation angle of the spur gear 39 and the bevel gear 40, and regulates the rotation of the both gears 39 and 40 to almost one rotation or less. That is, this stopper pin 84 is in contact with one side wall of the immovable member 85 as shown in FIG. 2 in the shutter charged state in which the film is wound up, and the rotational force from the diaphragm drive gear 36 causes both gears 39, 40 to move. When the gears 39, 40 rotate clockwise, the gears 39, 40 come into contact with the other side wall of the immovable member 85 at a position slightly less than one rotation, and serve to prevent the gears 39, 40 from rotating.

The tip edge of the drive arm 80 is located on the rotation path of the stopper pin 84. The drive arm 80 is formed by an L-shaped arm having a distal end extending between the spur gear 39 and the linking lever 77, and the base of the drive arm 80 is rotatably pivotally attached to a support shaft of the gear 38. Has been done.
At the tip edge portion of the arm 80, a protruding inclined edge portion 80a for locating an inclined edge at a part of the rotation path of the stopper pin 84 is provided.
Is formed, and this inclined edge portion 80a forms the stopper pin 8
The tip of the arm is pulled by a spring 86 and stopped by a stop pin 87 so as to be positioned on the rotation path of 4. A reset pin 88 is fixedly planted in the bent portion of the drive arm 80.

Next, the support shaft 12 of the planetary gear 9 is separated from the second stop arm 81, and the inclined tip end portion 89a for operating the shutter release lever 89 is arranged at the next operating position after moving on the orbit O in the direction of arrow a. Has been done. The release lever 89 has its fulcrum pivotally attached to the support shaft 90 so as to be swingable, and one arm thereof extends toward the rotation path of the support shaft 12, and its tip portion is the inclined tip portion. It is formed as 89a. Further, a switch opening / closing bent portion 89b is provided on the other arm, and when the inclined tip portion 89a is pushed by the support shaft 12 and the release lever 89 swings counterclockwise around the support shaft 90. The normally-closed switch SW2 is opened by the bent portion 89b, and a magnet (not shown) for opening the shutter is operated to open the shutter.

Next, the shutter is actuated to complete the exposure, and the reset member 91 is actuated in the process in which the support shaft 12 moves on the revolving orbit O in the direction of the arrow a and returns. The reset portion 91 has a pushing piece portion 91a bent downward at one end portion (the left end portion in FIG. 2) and has a substantially T-shape in a plan view, and the first stop arm 53 is seen in a plan view. The guide elongated holes 91b and 91c (see FIG. 4) are fitted in the guide pins 92a and 92b so as to be movable in the lateral direction. The drive arm 80 is provided at the other end (the right end in FIG. 2) of the reset member 91.
The pushing piece 91d for pushing the reset pin 88, the projecting edge portion 91e for pushing the pushing pin 74 of the restraint lever 71, and the lower end portion of the ratchet lever 49 (see FIG. 1). Bent pieces 91f are formed respectively. The reset member 91 thus laid horizontally is moved to the right (in FIG. 2) by the tension spring 93 applied to the pushing piece 91a.
The pushing piece 91a is stopped by the stopper 94 at a position where it is pushed and moved by the support shaft 12.

In addition, around the orbit O of the planetary gear 9, gear forming members 11a, 11b, 11 forming the internal gear 11 are formed.
Each of the c's is swingably arranged by a support shaft, and is stopped at an appropriate position by a tension spring and a stopper pin.

Each drive system and its drive mechanism are configured as described above. Next, the operation will be described.

I) Photographing Operation FIG. 2 shows a release standby state in which film winding and shutter charging have been completed. When the release button (not shown) is pressed in this state, the motor M
(See Fig. 1) is driven in the normal rotation direction, the sun gear 8 which is the output gear is counterclockwise, the planetary gear 9 is clockwise, the transmission gear 13 is counterclockwise, and the clutch gear.
14 try to rotate clockwise, but notch disc
The winding stop lever 61 is fitted into the notch 59a of the 59, and the one-turn gear 1
Since 6 is restrained, it becomes overloaded,
The planetary gear 9 starts to revolve while rotating on its axis, and its supporting shaft 12
Escapes from the inside of the notch 53c that is in contact with the inclined edge 53a, moves on the revolution orbit O in the direction of arrow a, and moves to the second stop arm 81.
The revolution is stopped at the inclined notch 81a. When the support shaft 12 stands still at this position, the planet gear 9 meshes with the diaphragm drive gear 36 as shown in FIG. 3, so that power is transmitted to the diaphragm automatic drive system. Then, as the spur gear 39, the bevel gear 40 and the stopper pin 84 rotate in the direction of the arrow, the proper aperture value is automatically controlled as described with reference to FIG. 1, and the cam 52 performs the mirror-up operation. . When this operation is completed, the stopper pin 84 pushes the inclined edge portion 80a of the drive arm 80, causing the drive arm 80 to spring 86.
Against the resilience of the gears, the gears are rotated clockwise around the support shaft as shown in FIG. 3 to get over the inclined edge portion 80a and come into contact with the immovable member 85 to stop the rotation of the gears 39, 40.

When the drive arm 80 rotates clockwise, the linkage lever
Since the other arm 77a of the 77 is pushed, the lever 77 rotates counterclockwise around the support shaft, and its pin 78 pushes the other arm 70b of the blocking lever 70 to make the lever 70 its own habit. Rotate counterclockwise around the support shaft. Then, the locking claw 70
Since the engagement between the a and the semi-cylindrical pin 69 is released, the shutter charge lever 65 rotates clockwise around the support shaft by the elastic force of the spring 68, and the cam slide contact pin 67 moves the operating circumference of the charge cam 60. Press it against the surface. Further, at this time, since the other arm 62a of the locking lever 62 is pulled by the elastic elastic force of the spring 66, the locking lever 62 pivots slightly clockwise around the support shaft to engage the locking portion 62b with the hook 71a of the restraining lever 71. Stop it. Therefore, in this state, the shutter is released and the shutter can be opened by operating the magnet for opening the shutter.

Further, when the stopper pin 84 gets over the inclined edge portion 80a, the drive arm 80 returns to the initial position.
The stopper pin 84 that abuts the 85 is held at the abutting position by the inclined edge portion 80a. When the stopper pin 84 comes into contact with the immovable member 85 and the rotation of the gears 39, 40 is stopped, the rotation of the gears 36 to 38 is also stopped, so that the planet gear 9 is overloaded. The gear 9 starts revolving while rotating again, and escapes from the inclined notch 81a. This planet gear 9 moves along the orbit O on the arrow a.
When the shutter release lever 89 is moved in the direction (see FIG. 2), the inclined tip portion 89a of the shutter release lever 89 is then pushed, and the lever 89 is swung counterclockwise around its support shaft 90 as shown in FIG. . Then, since the switch SW2 is opened by the bent portion 89b, the shutter opening operation magnet is operated and the shutter is opened. The motor M is stopped by the opening operation of the switch SW2. When exposure is started here and proper exposure is given by a photometric circuit (not shown), a shutter closing magnet (not shown) works to close the shutter, and the photographing ends.

II) Film winding and shutter charging operation When exposure is completed, a shutter closing signal is issued, which causes motor M to start normal rotation again, and planetary gear 9 revolves around sun gear 8 while rotating. To do. When the planetary gear 9 shifts from the internal gear 11a to the internal gear 11b, the support shaft 12 pushes the pushing piece 91a of the reset member 91 to move the reset member 91 to the left as shown in FIG. Shift to. Same member 91
Is displaced to the left, the protruding piece 91d is reset pin 8
As it pushes 8, the drive arm 80 moves the spring 86 around the spindle.
It rotates clockwise against the elasticity of the stopper pin 84 to retract the inclined edge portion 80a from the rotation passage of the stopper pin 84. When this retracts, the return spring and diaphragm drive ring of the movable reflecting mirror
A gear train that constitutes an automatic diaphragm drive system by the action of a return spring such as 44 (neither is shown), that is, a gear
36-43a also rotate in the backward direction, and rotate until the pin 84 of the gear 39, 40 abuts the upper side wall of the immovable member 85 counterclockwise. At the same time, the bent piece 91f is the ratchet lever 49.
Since the lower end of the ratchet lever is pushed to the left, the ratchet lever 49
(See FIG. 1) rotates clockwise around the support shaft to release the ratchet wheel 48 from the lock and release the electromagnet 51 to the attracting member 50.
(See FIG. 1) is displaced to a position where it is adsorbed. Further, the pin 74 is also pushed by the protruding edge portion 91e by the movement of the reset member 91 to the left, so that the restraining lever 71 rotates counterclockwise around the support shaft against the elastic force of the spring 72. Then, the hook 71a releases the engagement with the engaging portion 62b.
62 is rotated clockwise around the support shaft by the elastic force of the spring 66 until the other arm 62a contacts the cam sliding contact pin 67. When the locking lever 62 rotates clockwise, the pin 64 pushes the other arm 61b of the winding stop lever 61, so that the winding stop lever 61 rotates clockwise around the support shaft against the elasticity of the spring 63. The arm 61a is released from the cutout 59a of the cutout disk 59 for stopping winding,
Here, it becomes possible to wind up a piece of film.

After that, the support shaft 12 makes a half rotation on the revolution orbit O in the counterclockwise direction. Then, along with this, the reset member 91 also moves to the right, and the pushing piece 91a returns to the initial position where it abuts on the stopper pin 94. When this returns, the protruding piece 91d also moves to the right, so that the drive arm 80 returns to the initial position shown in FIGS. In addition, the bent piece 91f is a ratchet lever 49
The control lever 71 is separated from the lower end portion thereof, and the restraining lever 71 also rotates clockwise in accordance with the movement of the protruding edge portion 91e to the right.

Then, when the support shaft 12 pushes the first stop arm 53 to face the cutout portion 53c in the vicinity of one rotation, the stop arm 53 is rotated around the support shaft 54 by the spring 55 in the counterclockwise direction to form the cutout portion. The support shaft 12 is restrained in the portion 53c, and the revolution of the planetary gear 9 is stopped. When the support shaft 12 is constrained in such a position as to come into contact with the second inclined edge 53b of the cutout portion 53c, the planet gear 9 meshes with the transmission gear 13 at this position. Therefore,
By this engagement, the film is wound up and the shutter is charged.

That is, as shown in FIG. 5, the rotation of the planetary gear 9 is transmitted from the transmission gear 13 via the clutch gear 14 to the one-rotation gear 16
To and from the gear 16 to the sprocket lower gear 17. Notch disk when one rotation gear 16 is rotated once
59 and shutter charge cam 60 also make one revolution. Cam 60
When is rotated once counterclockwise, the cam sliding contact pin 67 is pushed by the operating cam edge, so that the charge lever 65 and the locking lever 62 integrally rotate in the counterclockwise direction around the support shaft. Move. Then, the semi-cylindrical pin 69 is constrained to a position where it is locked by the locking claw 70a of the blocking lever 70. Further, when the locking lever 62 rotates counterclockwise, the pin 64 of the locking lever 62 separates from the other arm 61b of the winding stop lever 61, so that the lever 61 moves the spring 63.
Is rotated counterclockwise around the support shaft by the elastic force of, and one arm end 61a thereof is fitted into the cutout 59a when the cutout disk 59 makes one rotation,
Stop the notched disk 59 with one rotation. The one arm end 61a is in pressure contact with the peripheral surface of the notched disc 59 until it makes one revolution.

In this way, the rotational force of the gear 16 whose one rotation can be controlled is transmitted to the gear 17, and when the gear 17 is rotated, this rotation causes the sprocket shaft 18 to rotate the sprocket 19 as shown in FIG. Since one spool of film is transported and the spool 1 is rotated through the sprocket upper gear 20, the idle gear 21, and the spool gear 22, the one frame of film transported by the sprocket 19 is wound up on the spool 1. In this way, when the film is wound and charging of the shutter is completed, one arm end of the winding stop lever 61 fits into the cutout 59a of the cutout disk 59 and the rotation of the one-turn gear 16 is stopped. ,
At this time, the planet gear 9 is in an overloaded state. Then, the planetary gear 9 starts to revolve again, and the support shaft 12 thereof slightly moves from the second inclined edge 53b to the position where it comes into contact with the first inclined edge 53a in the cutout portion 53c. When this moves, as shown in FIG.
Since it slightly rotates clockwise around 54, its switch opening / closing arm 53d closes the hoisting detection switch SW1, stops the motor M there, and hoisting mechanism and each drive system are all in the initial state of FIG. Return to position.

When the camera is set to the continuous shooting motor, the motor M does not stop even when the winding detection switch SW1 is closed, and the above-described shooting operation and film winding shutter charging operation are continuously performed. It is like this.

III) Film rewinding operation In order to rewind the film wound on the film winding spool 1 into the cartridge, the rewinding button 32 shown in FIG. 1 is pushed in to raise the sprocket shaft 18 and the sprocket shaft described later. This is performed by holding the raised position by the lock mechanism and reversing the motor M.

That is, when the sprocket shaft 18 is raised, the coupling member 35 is also raised against the spring 34 to disconnect from the fitting hole 19a, and the sprocket upper gear 20 is also raised to idle gear 21.
Cut off the engagement with. Therefore, sprocket 19 and spool 1
And will be free. When the motor M starts reverse rotation in this state, the sun gear 8 rotates clockwise as shown in FIG. Then, the planetary gear 9 rotates counterclockwise, and its support shaft 12 slightly moves clockwise on the revolution orbit O of the planetary gear 9 in the notch 53c, and is separated from the second inclined edge 53b to be the lower edge. Stop at the position where it touches. When the planetary gear 9 rotates counterclockwise at this position, the rotation is transmitted to the transmission gear 13, the planetary gear clutch mechanism is switched, the clutch gear 14 is separated from the one-turn gear 16, and the clutch gear 15b is rewound transmission gear. Engage with 24 and rotate gear 24 clockwise. Then, the rotational force causes the rewinding gear 30 (see FIG. 1) to rotate through the gear train composed of the gears 25 to 29, which causes the fork member 31 to rotate and rewind the film into the cartridge.

Then, when the rewinding is completed, a detection mechanism (not shown) is activated to stop the motor M, the signal is reset to the hoisting mode by a signal such as opening of the back cover of the camera, and the rewinding state in which the rewinding is stopped is returned.

When the film end is reached while the film is being wound, the sprocket 19 and the spool 1 are stopped, so that the planet gear 9 is overloaded and the spindle 12
Moves from the contact position of the second inclined edge 53b in the cutout portion 53c to the contact position of the first inclined edge 53a, and the first stop arm 53 swings clockwise around the support shaft 54. When this swings, the switch SW1 is closed, so that the film end is detected by a winding stop switch (not shown) detecting that this and the winding stop lever 61 are not fitted in the cutout 59a of the cutout disk 59. Has become.

Next, the above-mentioned sprocket shaft lock mechanism will be described. This lock mechanism is configured as shown in FIGS. 7 to 10. That is, as shown in FIG. 7, FIG. 8 (a), and FIG. 8 (b), a small diameter step portion 18a for locking is provided near the upper end of the sprocket shaft 18, and this step portion is provided. The lock piece 95 of the lock member 95 corresponding to the shaft peripheral surface above 18a.
a is located. The lock member 95 has a T-shaped planar shape, and the lock arm 95b extending toward the side of the sprocket shaft 18 is fitted to the small-diameter step portion 18a on the side surface facing the sprocket shaft 18. Rock piece 95a with thickness
Are integrally formed. The lock member 95 is arranged such that its left extending arm portion 95c is pivotally attached to a support shaft 96 so that the lock member 95 can be pivoted around the support shaft 96 by a tension spring 97 applied to a lock piece 95a. Although the habit of rotating in the clockwise direction is given, the rotation is blocked by the lock arm 95b being locked by the bent hanging piece 98a of the conductive leaf spring 98. Therefore, in this state, since the lock piece 95a does not contact the sprocket shaft 18, it does not become a load when the film is wound.

In addition, the conductive leaf spring 98 has a curved portion 98b formed near the tip end so as to come into pressure contact with the upper end surface of the sprocket shaft 18, and a movable conductive contact provided so as to face the tip end. The piece 99 and the normally closed switch SW4 for generating the reset completion signal are formed. And the lock member 9
A lock release lever 101 is provided between the right extending arm portion 95d of 5 and the protruding piece 100a of the camera back cover 100. The lever 101 is rotatably pivotally attached to a support shaft 102, and a spring 103 is provided with a tendency to rotate clockwise around the support shaft 102. When the arm is pushed, one arm stands still at a position largely separated from the right extending arm portion 95d of the lock member 95. A normally-closed switch SW3 for generating a holding signal is arranged near the left extending arm portion 95c.

The sprocket shaft lock mechanism is configured as described above. In the lock mechanism configured in this way,
When the rewind button 32 (see FIG. 1) is pushed and the sprocket shaft 18 is raised, the curved portion 98b is pushed up by the upper end surface of the coaxial shaft 18 as shown in FIG. 9 (a), so that the switch SW4 is opened. At the same time, the hanging piece 98a releases the lock of the lock arm 95b.
When this is released, the locking member 95 springs around the support shaft 96.
The locking piece 95a is pressed against the peripheral surface of the sprocket shaft 18 by being rotated clockwise by the elastic force of 97. When the small-diameter step portion 18a is aligned with the lock piece 95a as the shaft 18 moves upward,
As shown in FIG. 7B, the lock piece 95a enters the small-diameter step portion 18a and locks the sprocket shaft 18 in its raised position. In this operating state of the locking member 95, the right extending arm portion 95d
Comes close to one arm of the lock release lever 101, and the left extended arm 9
5c opens switch SW3. In this state, the sprocket shaft 18 and the sprocket 19 and the sprocket upper gear 20 and the idle gear 21 are disconnected from each other, and the motor M starts the reverse rotation by the open signal of the switch SW3.

Then, the rewinding is completed by this state transmission, and the motor M is stopped by the rewinding completion detecting mechanism (not shown).
When the lever is opened, as shown in FIG. 10, the protruding piece 100a is separated from the lock release lever 101 and the restraint is released, so that the lever 101 is rotated clockwise around the support shaft 102 by the elasticity of the spring 103. . When this is rotated, one arm of the release lever 101 pushes the right extending arm portion 95d, so that the lock member 95 moves the support shaft 9
Rotate counterclockwise around 6 to lock the lock piece 95a
Escape from 18a. When this escapes, the sprocket shaft 1
8 is unlocked at the ascending position, so it descends and returns to the initial state by its own habit.

However, when the sprocket shaft 18 is returned, the coaxial is the first
As shown in the drawing, the sprocket upper gear 20 and the connecting member 35 must be completely engaged with the idle gear 21 and the fitting hole 19a of the sprocket 19, respectively. For this reason,
In this lock mechanism, the motor M is rotated in the hoisting direction until the two are completely engaged. That is, when the lock member 95 rotates counterclockwise to unlock the sprocket shaft 18, the switch SW3 is closed, whereby the motor M rotates in the film winding direction and the sprocket shaft 18 rotates.
To rotate. Then, the sprocket upper gear 20 completely meshes with the idle gear 21, and the connecting member 35 is the sprocket.
When the sprocket shaft 18 completely fitted in the fitting hole 19a of 19 returns to the normal position, the switch SW4 is closed, a reset completion signal is generated, and the motor is stopped.

Further, in the above lock mechanism, the switch SW3 is used as the reverse rotation start signal, but the displacement of the lock member 95 may be used to switch the motor.

Further, as described above, when the sprocket shaft 18 is lowered, the motor is slightly rotated in the film winding direction by at least one rotation, which also serves the following purpose. That is, when the film end is reached, if the film feed stops before one frame of film has been wound up, the one-rotation gear 16 that charges the shutter also stops before one rotation is completed. Charging has ended halfway. Therefore, in order to engage the gears and the like as described above, the motor M
When is rotated in the winding direction, the remaining rotation of the one-rotation gear 16 can be performed, so that the shutter can be completely charged.

Next, FIGS. 11 to 13 show modifications of the switching mechanism between the film winding drive system and the film rewinding drive system in the above embodiment. Although the planetary gear clutch mechanism is used as the switching mechanism in the above embodiment, a one-way clutch may be used.

That is, as shown in FIG. 11, the one-rotation gear 16 is made into two-stage gears 16a and 16b, and the one-way clutch 105 is interposed between them. This one-way clutch 105 is well known,
For example, as shown in FIG. 12, the inner ring 105D and the outer ring 105F are connected only in one direction by the ball 106 and the compression spring 107 in the inclined cutout portion 105A.
As shown in the figure, the gear that engages the inner ring 105D with the motor-driven armature and the outer ring 105F with the sprocket lower gear 17
Connect to 16a respectively. With this configuration, when the motor M rotates normally, the inner ring 105D rotates counterclockwise, and the power is transmitted to the outer ring 105F via the ball 106. At this time, the angular velocity ω
Then, ω _D > ω _F (ω _D ; angular velocity of inner ring, ω _F ; angular velocity of outer ring), and the one-way clutch 105 operates to wind the film.

Further, as shown in FIG. 13, the transmission gear 13 and the gear 15c are connected by a connecting plate 108, and the gear 16b and the gear 13 are connected by an idle gear 109. Then, when the film is rewound, that is, when the motor is rotated in the reverse direction, the inner ring 1 of the one-way clutch 105 is
Since 05D rotates clockwise, if ω _D > ω _F , the one-way clutch 105 does not engage, and the spool 1 and the sprocket 19 integrally rotate in the reverse direction. The peripheral speed ratio difference at this time is absorbed by the spool friction.
Further, the reverse rotation of the shutter does not cause a large rewinding load once the charging is completed. Further, the cam slide contact pin 67 of the shutter charge lever 65 (see FIG. 2) may be slid at the time of reverse rotation so that the lever 65 cannot be reversely charged.

Furthermore, since the spool generally has a larger diameter ratio between the sprocket 19 and the spool 1, the sprocket has a larger angular velocity during rewinding. Therefore, if another unidirectional clutch is interposed between the sprocket 19 and the spool 1, both the sprocket and the spool can be rewound in a free state.

Even with the configuration of this modification, it is possible to automatically rewind by reversing one motor.

Next, FIG. 14 shows a modification of the winding stop reset mechanism. In the above embodiment, the ratchet lever 49 for controlling the aperture is released by moving the reset member 91. That is, the drive arm 80, the ratchet lever 49,
The restraint levers 71 are released independently by moving the reset members 91. However, as shown in FIG. 14, the winding stop lever 61 includes a first arm 61a that engages and disengages with the notch 59a of the notch disc 59, and a second arm 61b that is pressed by the push pin 64 of the locking lever 62. The ratchet lever 49 is composed of a three-arm rod with a third arm 61c that pushes the lower end of the ratchet lever 49.
When the hook 71a of is released from the engaging portion 62b, the engaging lever 62
The pin 64 first pushes the second arm 61b to rotate the winding stop lever 61 in the clockwise direction, and the first arm 61a is ejected from the notch 59a.
After that, the ratchet lever 49 may be released by the third arm 61c, and the ratchet lever 49 may be sequentially operated in a shogi manner. FIG. 15 is a time chart of a modified example of the winding stop reset mechanism.

[Effects of the Invention] As described above, according to the present invention, it is possible to control the drive system for the diaphragm and mirror-up operations and the drive system for the film winding and shutter charge operations only by the normal rotation of one motor. Therefore, the number of control elements on the circuit can be reduced.
Further, since the film rewinding drive system is operated by the reverse rotation of the motor, the circuit for rewinding does not require an element such as a short brake. Since the shooting operation and film winding operation are performed only in one direction, the time lag between them is small, and automatic rewinding (auto return) is possible, and the diaphragm and mirror drive system and film winding drive are also possible. Since the systems are close to each other, a number of remarkable effects are exhibited, in which mechanical sequencing is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram of each drive transmission system of a motor drive camera showing an embodiment of the present invention, and FIG. 2 is a plan view showing a detailed configuration of each drive transmission system. FIG. 3 is a plan view showing the operation of the diaphragm automatic control drive system at the time of shooting, FIG. 4 is a plan view showing the operation of the drive system at the time of shutter release and release of the winding stop, and FIG. FIG. 6 is a plan view showing the operation of the drive system at the time of up, FIG. 6 is a plan view showing the operation of the drive system at the time of rewinding the film, FIG. 7 is an exploded perspective view of the lock mechanism of the sprocket shaft, FIG. 7A and 7B are front views and plan views of the locking mechanism of FIG. 7, and FIGS. 9A and 9B are front views and plan views showing an operating mode of the locking mechanism. FIG. 11 is a diagram showing a modified example of the drive system switching mechanism, FIG. 12 is a sectional view of a one-way clutch, and FIG. 13 is Note FIG. 11 is a plan view showing a film rewinding drive system in the drive system switching mechanism of FIG. 11, FIG. 14 is a plan view showing a modified example of the winding stop reset mechanism, and FIG. 15 is a winding stop reset of the above FIG. 7 is a time chart of the operation of the mechanism. M …… Motor 8 …… Sun gear 9 …… Planetary gear 13 …… Drive force transmission gear 53 …… Stop arm 53a, 53b …… Locking part

Claims (1)

[Claims] 1. A motor drive camera in which a film winding operation is performed by rotating the motor in one direction and a film rewinding operation is performed by rotating in the other direction of the motor, and a planetary gear mechanism driven by the rotation of the motor, A switching means that meshes with the planetary gear of the planetary gear mechanism and switches the transmission of the driving force by rotation of the planetary gear between a film winding mechanism and a film rewinding mechanism; and the film so that only one frame is wound. A winding control means for controlling a winding mechanism and a position where the driving force of the planetary gear can be transmitted to the switching means when the motor rotates in one direction, and the planetary gear is prevented from revolving so that only one film is formed. After being wound up, an inclined edge that allows the planetary gear to revolve, and when the motor rotates in the other direction, the planetary gear is prevented from revolving, and the planetary teeth are rotated. A motor drive camera comprising: a stop arm having a notch portion formed with a lower edge for transmitting the driving force of the vehicle to the switching means to drive the rewinding mechanism.