JPH087367B2 - Motorized device for camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an electric device for a camera, in which one electric motor is used to wind and rewind a film.

[Prior art]

With the recent progress of electrification of cameras, one frame of film at the time of shooting, film rewinding after shooting, and focal length adjustment have been automated.

For example, in Japanese Laid-Open Patent Publication No. 60-97329, an electric motor that winds the film in forward rotation and rewinds the film in reverse rotation, and a rewinding fork from the electric motor to move the taking lens barrel. The clutch means capable of switching power from the gear train up to and the switch for reversely rotating the motor in conjunction with the switching of the clutch means. The switching of the clutch means causes the motor to reversely rotate. An electric device for a camera that moves a lens barrel has been proposed.

[Problems to be solved by the invention]

However, in the electric device of the camera, the film is wound in the forward rotation and the film is unwound in the reverse rotation, so that the control circuit for switching the motor between the forward and reverse directions is complicated. .

The present invention has been made in view of such circumstances,
An object of the present invention is to propose an electric device for a camera in which a motor control circuit is simplified by rotating a motor in one direction to wind and unwind the film.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention draws out a film stored in a cartridge and winds it on a spool, a film rewinding mechanism for rewinding the film from the spool into the cartridge, and an electric motor. A first planetary clutch mechanism for transmitting a rotational force in the positive direction to the film winding mechanism or the film rewinding mechanism, and a biasing member for urging the first planetary clutch mechanism to connect to the film rewinding mechanism. A locking member that holds the first planetary clutch mechanism so as to connect the first planetary clutch mechanism to the film winding mechanism against the biasing force of the biasing member, and a sun gear that rotates by the rotational force from the electric motor, A planetary gear that meshes with the sun gear and meshes with the first planetary clutch mechanism, and a torque detection lever that pivotally supports the sun gear and the planetary gear. When the winding torque reaches a predetermined value or more at the end of the winding of all the films, the planet gear rotates around the sun gear to rotate the torque detecting lever, and the torque detecting lever is caused by the locking member. A torque detection mechanism for releasing the connection of the first planetary clutch mechanism to the film winding mechanism, a focal length variable mechanism for changing the focal length by moving the taking lens barrel to the tele side or the wide side, and the reverse of the electric motor. A second planetary clutch mechanism that switches the rotational force from the electric motor to a variable focal length mechanism from a film winding mechanism by rotating in a direction, and is connected to and operated by the second planetary clutch mechanism to operate the taking lens mirror. A focal length switching operation member for connecting the second planetary clutch mechanism with the focal length varying mechanism so that the barrel moves to the telephoto side or the wide side. It is characterized in that it consists of.

[Action]

The present invention winds the film by rotating the electric motor in the normal direction, and when the film winding is completed after the photographing is finished, when the torque detecting mechanism detects the film end, the first planetary clutch mechanism is switched to the film rewinding mechanism. connect. As a result, both the film winding operation and the film rewinding operation can be performed by the forward rotation of the electric motor.

Further, when the electric motor is rotated in the reverse direction, the second planetary clutch mechanism is switched from the film winding mechanism to the variable focal length mechanism, and the focal length can be adjusted.

〔Example〕

Hereinafter, preferred embodiments of an electric device for a camera according to the present invention will be described in detail with reference to the accompanying drawings.

The electric device of this camera will be described in detail below with reference to FIG. In FIG. 1, the output gear 12 of the motor 10 is a gear 14,
It is connected to the sun gear 26 via 16, 18, 20, 22, 24. The arm 28 is pivotally supported on the central axis 26A of the sun gear 26.
A pin 26B is erected at an end of the arm 28, and a planet gear 30 pivotally supported by the pin 26B meshes with the sun gear 26. The sun gear 26, the planetary gear 30, and the arm 28 constitute a first planetary clutch mechanism. The planetary gear 30 is switched to either the gear 32 of the film winding mechanism or the gear 34 of the film rewinding mechanism depending on the rotation direction of the sun gear 26.

A spring 36 is attached to one end 28A of the arm 28, whereby the arm 28 is urged counterclockwise. This spring
36 is the motor 10 during manual rewind as described later.
It is provided to rotate the, and is not particularly necessary during auto rewind. On the other hand, this arm 28 is engaged with a pin 40 erected on the locking lever 38 and one end 28A thereof, and is held against the urging force of the spring 36. On the other hand, arm 28
Is provided with a protrusion 28B for turning the switch 29 on and off,
The switch 29 is switched from on to off by the counterclockwise rotation of the arm 28. The switch 29 acts as a drive switch for detecting the state of winding and rewinding at the time of automatic rewind and for rotating the motor 10 at the time of manual rewind.

The locking lever 38 is rotatably supported about a shaft 42 and is urged to rotate counterclockwise about the shaft 42 by a spring 44, whereby the planetary gear 30 is connected to the gear 32 of the film winding mechanism.
Are held in the meshing direction.

On the other hand, the arm 46 pivotally supported by the shaft 22A of the gear 22 is urged to rotate in the clockwise direction by the spring 48 and is in contact with the stopper 50. A pin 52 is erected at the end of the arm 46 and the pin 52 is
Is in contact with the locking lever 38. Therefore, when the sun gear 26 is prevented from rotating by a film end described later, the rotation force of the motor 10 causes the gear 24 and the arm 46 to move to the sun gear 22.
Around the shaft 22A counterclockwise around the shaft 22A against the biasing force of the spring 48, whereby the locking lever 38 is rotated clockwise around the shaft 42, and the end 28A of the arm 28 is rotated. The engagement between the pin 40 and the pin 40 is released, and the planetary gear 30 meshes with the gear 34 of the rewinding mechanism by the switching force generated by the rotation of the sun gear 26.

On the other hand, a bent portion 38A is formed at the other end of the locking lever 38,
The engagement between the pin 40 and the arm 28 is released by operating this from outside the camera and biasing it in the direction of the arrow in the figure. Then, the arm 28 rotates counterclockwise by the urging force of the spring 36, turns off the switch 29, rotates the motor 10, and performs a manual rewind operation.

The back cover opening / closing detection lever 54 is rotatably supported about a shaft 56, and is urged to rotate counterclockwise about the shaft 56 by a spring 58, and its end 54A is attached to the back cover 60. Receiver 62
Is in contact with. Therefore, as shown in FIG. 4, when the back lid 60 is rotated around the opening / closing shaft 64 and opened, the back lid opening / closing detection lever 54 is released from the restraint by the back lid 60, and the back lid opening / closing detection lever 54 is released. The urging force of the spring 58 causes the shaft 56 to rotate counterclockwise about the shaft 56. As a result, the pin 66 implanted at the other end 54B of the lever 54 presses the arm 28, forcibly rotating the arm 28 clockwise, separating the planetary gear 30 from the gear 34 of the rewinding mechanism, and winding It is engaged with the gear 32 of the upper mechanism and is held by the locking lever 38. This causes the reset.

As shown in FIG. 1, a sun gear 70 is mounted coaxially and integrally with the gear 32 of the film winding mechanism.
An arm 72 is supported by A. This arm 72 has a pin 73
The planet gear 74 is pivotally supported on the pin 73. The sun gear 70, the arm 72, and the planetary gear 74 constitute a second planetary clutch mechanism. The planetary gear 74 meshes with a spool gear 78 provided at the upper end of the spool 76 or a gear 80 of a focal length switching mechanism by switching the motor 10 forward or reverse. A claw 82 that meshes with the perforation of the film is formed on the outer periphery of the spool 76, and a gear 84 is formed at the lower end of the claw 82. The gear 84 includes a gear 86 and a gear 88.
Is meshing with. A one-tooth gear 90 is provided coaxially with the gear 88, and the one-tooth gear 90 is attached to the spool 76 of the film.
The film is initially fed until it is wound on the claw 82.

Next, the focal length switching mechanism will be described. A rotating lever 80A of the gear 80 is provided with a lever 92 for switching the driving direction of the lens barrel, and the lever lever 92 engages with the gear 80.
94, 98, and a gear 96 that meshes with the gear 94 are rotatably supported. The gears 94 and 96 are gear trains when driving in the tele direction, and the gear 98 is a gear when driving in the wide direction. Therefore, by rotating the switching lever 92 around the shaft 80A, the tele gear 96 meshes with the gear 100, or the wide gear 98 meshes with the gear 100. However,
Since the switching lever 92 is constantly urged to rotate clockwise by the spring 93, the switching lever 92 is urged and held in the tele direction in the normal state.

Further, the gear 100 meshes with a gear 102, and a worm 104 is formed on the gear 102. Worm 104 is gear 10
A gear 108 that meshes with 6 and is formed coaxially meshes with an encoder gear 110. A pin 112 is erected at an eccentric position on the encoder gear 110, and the pin 112 is engaged with a lens barrel feeding lever 114. That is, the lens barrel feeding lever 114 is swingably supported around the shaft 114A and has a long hole 116 formed therein, and the pin 112 from the encoder gear 110 is fitted into the long hole 116. Therefore, the rotation of the encoder gear 110 causes the lens barrel extension lever 114 to swing about the shaft 114A. A pin 118 is set up at the lower end of the lens barrel feeding lever 114, and the pin 118 is fitted in the long hole 122 of the lens barrel 120. Therefore, the lens barrel 120 is moved back and forth when the lens barrel extension lever 114 swings.

Next, the zoom switch mechanism will be described. A pin 124 is erected at the end of the drive direction switching lever 92 of the lens barrel, and the pin 124 is in contact with the projection 128 of the first slide lever 126. The first slide lever 126 is pulled rightward by a spring 130 and is in contact with the stopper 132. Spring 1
Numeral 30 is for applying a biasing force in the return direction when the zoom switch lever 136 is held at the wide position. On the other hand, a pin 134 is implanted at the other end of the slide lever 126, and this pin 134 is engaged with the zoom switch lever 136. A second slide lever 138 is provided on the lower surface of the zoom switch lever 136, and the second slide lever 138 is pulled leftward by a spring 140 and comes into contact with a stopper 142. A pin 144 is set on the slide lever 138. The pin 144 engages with the zoom switch lever 136, and the spring 14
A value of 0 applies an urging force in the return direction when the zoom switch lever 136 is held at the tele position. Further, the zoom switch lever 136 is provided with a movable contact piece 137, and the variable contact piece 137 constitutes a tele-wide switch together with the printed board 139.

Further, an end 148 of the main switch lever 146 is engaged with the pin 134 of the first slide lever 126, and the main switch lever 146
Has two positions, an OFF position and an ON position, and the projection 150A of the click lever 150 is fitted and held in the recesses 146A and 146B at each position.

When the zoom switch lever 136 is moved from the neutral position N to the tele position T, only the tele wide switches 137 and 139 are turned on while the first slide lever 126, the switching lever 92, and the gear trains 94 and 96 are turned on, and the motor 10 is driven in the reverse direction. It is driven and tele operation is performed.

On the other hand, when the zoom switch lever 136 is moved from the neutral position N to the wide position W, the projecting piece 128 of the first slide lever 126 moves the pin 124 to the left, and accordingly, the switching lever 92 rotates counterclockwise around the shaft 80A. Then, the wide-side gear group 98 is connected to the gear 100, and at the same time, the tele-wide switches 137 and 139 are turned on to drive the motor 10 in the opposite direction to perform the wide operation.

Next, the rewinding mechanism will be described. Rewind mechanism gear
34 is connected to gears 152, 154, 156, 158, 160,
The lower surface of the gear 160 is provided with a cartridge fork 162 that engages with the core of the film cartridge.

The operation of the embodiment of the electric device for a camera according to the present invention constructed as described above is as follows.

First, the film winding operation will be described. Lock lever
The locking lever 38 and the torque detection lever 46 are shown in FIGS. 1 and 2 by the urging force of the spring 44 of 38 and the spring 48 of the torque detection lever 46.
The arm 28 assumes the position shown in FIG. 1 in the position shown in FIG.
Numeral 30 meshes with a gear 32 of the film winding mechanism. When the motor 10 rotates forward (clockwise) in this state, the rotational force is transmitted to the film winding mechanism by the gear train of gears 12 → 14 → 16 → 18 → 20 → 22 → 24 → 26 → 30 → 32. As a result, the spool 76 rotates counterclockwise by the gear series 32 → 70 → 74 → 78 of the film winding mechanism, and the film (not shown) is wound on the spool 76.

The film rewinding operation is performed as follows. When shooting is completed and the entire length of the film is wound on the spool 76, the film end is engaged with the core in the film cartridge, and when the film is finished winding, the spool 76 rotates regardless of the rotation force of the motor 10. Become impossible. If the motor 10 still tries to rotate in this state, the torque detected by the motor 10 causes the torque detection lever 46 to counteract the biasing force of the spring 48 about the shaft 22A as shown by the imaginary line in FIG. Rotate clockwise. When the torque detection lever 46 rotates counterclockwise, the locking lever 38 is in contact with the pin 52 of the torque detection lever 46, and therefore rotates clockwise around the shaft 42 against the urging force of the spring 44. Move. When the locking lever 38 rotates clockwise, the engagement relationship between the pin 40 of the locking lever 38 and the end 28A of the arm 28 is released, and the arm 28 is disengaged from the spring 36 as shown by the imaginary line in FIG. As a result, the planetary gear 30 revolves in the counterclockwise direction by the rotation of the sun gear 26 and meshes with the gear 34 of the rewinding mechanism. Thereby, the motor 10 and the rewinding mechanism are connected, and the gear series 12 → 14 → 16 → 18 → 20 → 22 → 24 → 26 → 30 → 34 → 152 → 154
→ 156 → 158 → 160, the patrone fork 162 rotates, and the film is rewound into the patrone.

As described above, according to the embodiment of the present invention, when the film is wound around the spool 76 by the normal rotation of the motor 10 and the film end is detected after the film winding is completed, the torque detection lever is detected.
46 is actuated, and the film can be rewound into the cartridge in the forward rotation direction of the motor 10. As described above, in the embodiment according to the present invention, both the film winding operation and the film rewinding operation can be performed by the forward rotation of the motor 10.

Next, the operation of the focal length switching mechanism will be described. First, when the zoom knob 136A is in the neutral position N,
The zoom direction switching lever 92 is located on the tele side by the action of the spring 93 as described above.
137 and 139 are OFF and the motor 10 does not rotate. Next, the zoom knob 136A is moved to the tele position T against the urging force of the spring 140.
When the motor 10 is held at
Is turned on and is rotated in the reverse direction (counterclockwise rotation), and the rotational force from the motor 10 is gears 12 → 14 → 16 → 18 → 20 → 22 → 24 → 26 → 30 →
A clockwise rotational force is transmitted to the gear 32 by the gear 32. gear
When the 32 rotates clockwise, the planet gear 74 rotates counterclockwise, whereby the arm 72 rotates clockwise, and the planet gear 74 meshes with the gear 80 of the focal length switching mechanism. When the gear 74 meshes with the gear 80, the switching lever 92 has already been switched.
Is located on the tele side, the rotational force from the motor 10 rotates the lever 114 clockwise about the shaft 114A by the gears 80 → 94 → 96 → 100 → 102 → 104 → 106 → 108 → 110 . As a result, the lens barrel 120 is extended.

Next, when the zoom knob 136A is positioned at the wide position W, the first slide lever 126 moves leftward, whereby the switching lever 92 rotates counterclockwise about the shaft 80A,
As the gear 96 moves away from the gear 100, the wide planet gear 98 comes into mesh with the gear 100. At the same time, the tele-wide switches 137 and 139 are turned on and the motor 10 is rotated in the reverse direction.
After being transmitted in the sequence of 4 → 106 → 108 → 110, the lens barrel sending lever 114 rotates counterclockwise about the shaft 114A, and the lens barrel 120 is retracted.

Next, move the main switch 146 to the OFF position
The slide lever 126 is moved to the left, the pin 124 is rotated in accordance therewith, and the switching lever 92 is switched to the wide side.
As a result, the motor 10 rotates in the reverse direction and the lens barrel 120 is retracted and stored in the wide side, and the barrier (not shown) is closed.

〔The invention's effect〕

As described above, according to the electric device for a camera of the present invention, the torque detection mechanism for detecting the predetermined torque at the end of the winding of all the films and connecting the first planetary clutch mechanism to the film rewinding mechanism is provided. Therefore, film winding and film rewinding can be performed by the normal rotation of the motor.

Further, when the motor is rotated in the reverse direction, the second planetary clutch mechanism is switched from the film winding mechanism to the focal length varying mechanism, and the focal length can be changed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a gear transmission mechanism of a film electric device of a camera according to the present invention, FIG. 2 is a plan view showing the operation of a torque detection mechanism in a film winding mode, and FIG. 3 is a torque in a film rewinding mode. FIG. 4 is an explanatory view showing the detection mechanism, and FIG. 4 is a plan view showing a state in which the back cover is opened and resetting is performed. 10 Electric motor, 28 …… Arm, 30 …… Planetary gear, 38 ……
Locking lever, 46 …… Torque detection lever, 76 …… Take-up spool, 92 …… Switching lever, 120 …… Lens barrel, 136 ……
Zoom switch lever, 162 …… Patrone fork.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Nishizawa 1-324 Uetakecho, Omiya City, Saitama Prefecture Fuji Photo Optical Co., Ltd. (72) Inventor Haruo Onozuka 1-324 Uetakecho, Omiya City, Saitama Prefecture Fuji Photo Kouki Co., Ltd. (72) Inventor Masashi Takamura 2 26-30 Nishiazabu, Minato-ku, Tokyo Fuji Shashin Film Co., Ltd. (56) Reference JP-A-60-97329 (JP, A) JP-A-61 -35435 (JP, A) JP-A-60-100127 (JP, A) JP-A-60-131529 (JP, A)

Claims (1)

[Claims] 1. A film winding mechanism for pulling out a film stored in a cartridge and winding it on a spool, a film rewinding mechanism for rewinding the film from the spool into the cartridge, and a forward rotational force of an electric motor. A first planetary clutch mechanism that transmits to a film winding mechanism or a film rewinding mechanism; an urging member that urges the first planetary clutch mechanism so as to connect the first planetary clutch mechanism to the film rewinding mechanism; A locking member that holds the first planetary clutch mechanism so as to connect the first planetary clutch mechanism to the film winding mechanism against an urging force; and a sun gear that rotates by the rotational force from the electric motor,
A planetary gear that meshes with the sun gear and meshes with the first planetary clutch mechanism, and a torque detection lever that pivotally supports the sun gear and the planetary gear. The torque detection lever is rotated by the rotational movement of the planet gear around the gear, and the torque detection lever releases the connection of the first planetary clutch mechanism to the film winding mechanism by the locking member. A mechanism, a focal length variable mechanism for changing the focal length by moving the taking lens barrel to the tele side or the wide side, and a rotational force from the electric motor by the rotation of the electric motor in the opposite direction from the film winding mechanism to the focal length. A second planetary clutch mechanism that is switched to a variable mechanism, and is connected to the second planetary clutch mechanism and is operated to operate the image capturing mechanism. The focal length switchover operation member a second planetary clutch mechanism is connected to the focal length variable mechanism so's barrel is moved to the telephoto side or the wide side, the camera of the electric apparatus consisting of.