JPH0193711A - Motor device for camera - Google Patents

Abstract

PURPOSE:To advance and retreat a photographing lens barrel by the unidirectional rotation of a motor, to change a focus distance and to set a camera in a desired position by providing an engagement member engaging with the end of a lever joined to a zoom operating knob and the end of lever joined to a main switch knob in the same direction. CONSTITUTION:Since a changeover switch 92 is always energized counterclockwise by a spring 93, a television gear 96 is meshed with a gear 100. A gear 98 is a one in the wide angle direction, and when the changeover switch 92 is rotated, centered about an axis 80A, the gear 98 is meshed with the gear 100. Since a zoom operating lever 136 and a main switch lever 146 engage with a lever 126 through a pin 134, the action of the zoom operating knob 136A does not interfere the action of the main switch knob 146C. Each knob rotates the changeover switch 92 through the lever 126, whereby the unidirectional rotation of the motor 10 changes a focus distance. Besides, through the operation of the main switch the lens barrel can be set in a desired position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a motorized device for a camera that changes the focal length by rotating an electric motor in one direction.

[Prior Art] Cameras have recently become more and more electric, and operations such as winding up one frame of film during shooting, rewinding the film after shooting, and adjusting focal length have become automated.

2. Description of the Related Art Conventionally, there is a camera equipped with an electric motor that winds and rewinds a film, and a dedicated zoom motor that moves a photographic lens barrel forward and backward by operating a zoom switch.

This heel-mounted camera can move the photographing lens barrel forward or backward by rotating the zooming motor in the forward or reverse direction, so it electrically detects whether the zoom switch is in the wide or tele position and performs the zoom operation. In addition, when the main switch is turned off while the zoom switch is in the neutral position, the photographing lens barrel can be retracted to the collapsed position, and the barrier can then be easily closed.

[Problem that the invention seeks to solve]

The above-mentioned conventional camera has a motor for winding and rewinding the film and a motor dedicated to zooming, but it is possible to configure it so that a single motor can perform the film winding and rewinding operations and the zooming operation. Conceivable. In this case, it is necessary to perform a zooming operation by rotating the motor in one direction, and to perform film winding and rewinding operations by rotating the motor in the other direction.

By the way, in order to perform a zooming operation by rotating the motor in one direction, for example, by rotating a switching lever having a plurality of gear trains in conjunction with the operation of the zoom control knob, the direction of rotation is switched and the photographic lens is rotated. The lens barrel must be moved forward and backward.

However, when switching the rotation direction in conjunction with the operation of the zoom operation knob, the zoom operation knob and the switching lever must be mechanically connected, and as a result, the main switch cannot be turned OFF as described above. This causes a problem in that it is no longer possible to add a function such as retracting the photographic lens barrel to the collapsed position or automatically advancing the photographic lens barrel from the collapsed position to the wide end by turning on the main switch.

The present invention was made in view of these circumstances, and allows the focal length to be changed by rotating the motor in one direction, and also allows the photographing lens barrel to be set at a desired position by turning the main switch 0NS OFF. The purpose of this invention is to provide a motorized camera device.

[Means for solving problems]

In order to achieve the above object, the present invention provides a motorized device for a camera in which the focal length is changed by advancing and retracting a photographing lens barrel by rotation of an electric motor in one direction. is transmitted M
The following gear has a plurality of gears including a gear L and is rotatably provided around the first gear, and is configured to move the photographing lens barrel forward and backward by rotating around the first gear. a switching means for switching and transmitting rotation in the same direction or the opposite direction to that of the first gear to a second gear; and rotating the switching means in a predetermined direction so as to rotate the subsequent second gear in a fixed direction. a zoom operation knob that can take a wide position, a neutral position, and a tele position by manual operation; a main switch knob that can take an ON position and an OFF position by manual operation; It has an engaging member that engages with end faces in the same direction of the connected lever and the lever connected to the main switch knob, and when the zoom operation knob is operated to one of a wide position and a tele position. Only when the main switch knob is turned off
Only when the operation is performed to either one of the position and the ON position, each operating force is transmitted to the switching means via the engaging member, and the switching means resists the urging force of the urging means. and power transmission means for rotating the second gear and reversing the direction of rotation of the second gear.

[Effect]

According to the present invention, the switching means is rotated by the urging means so that rotation in the telephoto direction is always transmitted, and the operating force is transmitted only when the zoom operation knob is operated to the wide position. The rotation is transmitted to the switching means via the means, and the switching means is rotated to switch the rotation to the wide direction. Similarly, when the main switch knob is set to the OFF position, the switching means is rotated via the power transmission means in conjunction with the OFF position movement of the main switch knob, thereby switching to wide direction rotation. As a result, the operations of the zoom operation knob and the main switch knob do not interfere with each other, and the rotation direction can be switched by the switching means as necessary.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the motorized device for a camera according to the present invention will be described in detail below with reference to the accompanying drawings.

The motorized device of this camera will be explained in detail below with reference to FIG.

In FIG. 1, the output gear 12 of the motor 10 is the gear 14.
．． Sun Gear 26 via 16.18.20.22.24
is connected to. The arm 28 is pivotally supported by the central shaft 26A of the sun gear 26.

A pin 26B is installed at the end of the arm 28, and a planetary gear 30 pivotally supported by the pin 26B meshes with the sun gear 26. Sun gear 26, planet gear 30, arm 28
constitutes a first planetary clutch mechanism. This planetary gear 3
0 is switched to either gear 32 of the film winding mechanism or gear 34 of the film rewinding mechanism depending on the rotational direction of the sun gear 26.

A spring 36 is attached to one end 28A of the arm 28, thereby biasing the arm 28 in a counterclockwise direction <CCW direction). This spring 36 is provided to rotate the motor 1O during manual rewind, as will be described later, and is not particularly necessary during auto rewind. On the other hand, this arm 28 is held against the biasing force of the spring 36 by engaging a pin 40 set on the locking lever 38 with one end 28A thereof. On the other hand, the arm 28 is provided with a protrusion 28E3 that turns the switch 29 on and off, and the switch 29 is turned from on to off by rotation of the arm 28 in the CCW direction.

This switch 29 detects the winding and rewinding state during auto rewind, and the motor 10 during manual rewind.
Acts as a drive switch for rotational drive. 4. The locking lever 38 is rotatably supported around a shaft 42 and is biased by a spring 44 to rotate around the shaft 42 in the CCW direction, so that the planetary gear 30 is connected to the gear 32 of the film winding mechanism. It is held in the direction of engagement.

On the other hand, the arm 46 supported by the shaft 22A of the gear 22 is urged to rotate clockwise (CW direction) by a spring 48 and is in contact with a stopper 50.

A pin 52 is installed at the end of the arm 46.
is in contact with the locking lever 38. Therefore sun gear 26
When rotation is prevented by the film end described later,
Due to the rotational force of the motor 10, the gear 24 and the arm 46 move around the sun gear 22 against the biasing force of the spring 48 to rotate the shaft 22.
The locking lever 38 is rotated in the CCW direction around the shaft 42, and the locking lever 38 is rotated in the CW direction around the shaft 42.
The engagement relationship between the end portion 28A and the pin 40 is released, and the planetary gear 30 is brought into mesh 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, and the engagement between the pin 40 and the arm 28 is released by operating this from outside the camera and rotating it in the direction of the arrow in the figure. . Therefore, the arm 28 is pressed against the CC by the biasing force of the spring 36.
The manual rewind operation is performed by rotating in the W direction, turning off the switch 29, and rotating the motor 10.

The camera back opening/closing detection lever 54 is rotatably supported around a shaft 56 and rotated clockwise around the shaft 56 by a spring 58.
The end portion 54A of the back cover 6
The holder 0 is in contact with the portion 62. Therefore, when the back cover 60 is rotated around the opening/closing shaft 64 and opened as shown in FIG. Due to the biasing force of the spring 58, it rotates about the shaft 56 in the CCW direction.

As a result, the pin 6 is planted on the other end 54B of the lever 54.
6 presses the arm 28 and forces the arm 28 CW.
Rotate in the direction and rewind the planetary gear 30! 4 gears 3
4 and is engaged with the gear 32 of the hoisting mechanism and held by the locking lever 38. This causes a reset.

As shown in FIG. 1, a sun gear 70 is integrally and coaxially attached to the gear 32 of the film winding mechanism. An arm 72 is pivotally supported on the OA. This arm 72
A pin 73 is installed in the pin 73, and the planetary gear 7 is attached to this pin 73.
4 is pivoted.

The sun gear 70, arm 72, and planetary gear 74 constitute a second planetary clutch mechanism. The planetary gear 74 is adapted to mesh 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 IO between forward and reverse directions. A claw 82 that engages with the perforations of the film is formed on the outer periphery of the spool 76, and a gear 84 is formed at the lower end thereof, and this gear 84 engages with gears 86 and 88. gear 88
A single-tooth gear 90 is provided coaxially with the spool 76, and this -tooth gear 90 initially feeds the film until the league portion of the film is wound onto the pawl 82 of the spool 76.

Next, the focal length switching mechanism will be explained. The rotating shaft 80A of the gear 80 is provided with a lever 92 for switching the driving direction of the lens barrel, and the switching lever 92 has gears 94 and 98 that mesh with the gear 80, and a gear 96 that meshes with the gear 94.
is pivoted.

The gears 94 and 96 are gear trains for driving in the telephoto direction, and the gear 98 is a gear for driving in the wide-angle direction. Therefore, by rotating the switching lever 92 around the shaft 80A, the tele gear 96 changes to the gear 100.
or wide gear 98 is gear 10.
It will mesh with 0. However, since the switching lever 92 is always urged to rotate in the CW force direction by the spring 93, it is kept urged in the telephoto direction in the normal state.

Furthermore, this gear 100 meshes with a gear 102, and this gear 102 has a worm 104 formed therein. The worm 104 meshes with a gear 106, and a coaxial gear 108 meshes with an encoder gear 110.

This encoder gear 110 has pin 1 at an eccentric position.
12 is erected, and this pin 112 is engaged with a lens barrel extension lever 114. That is, the lens barrel extending lever 114 is supported so as to be swingable about a shaft 114A, and is formed with a long hole 116, into which a pin 112 from the encoder gear 110 is fitted. Therefore, the rotation of the encoder gear 110 causes the lens barrel extension lever 114 to swing around the shaft 114A. A pin 118 is installed at the lower end of this lens barrel extension lever 114, and this pin 118 is attached to the lens barrel 1.
It fits into the long hole 122 of 20. Therefore, by swinging the lens barrel extension lever 114, the lens mirror 1
1Fii120 will move back and forth.

Next, the zoom switch mechanism will be explained. A pin 124 is installed at the 4th part of the drive direction switching lever 92 of the lens barrel, and this pin 124 is connected to the first slide lever 126.
It is in contact with the protruding piece 128 of.

The first slide lever 126 is pulled rightward by a spring 130 and is in contact with a stopper 132 . Spring 1
Reference numeral 30 applies a biasing force in the return direction when the zoom switch lever 136 connected to the zoom operation knob 136A is held at the wide position. On the other hand, a pin 134 is installed at the other end of the slide lever 126, and this pin 134 is engaged with a zoom switch lever 136.

A second slide lever 138 is provided on the bottom surface of the zoom switch lever 136.
is pulled to the left by the spring 140 and the stopper 1
42. This slide lever 138 has a second pin 144 that engages with the zoom switch lever 136 and this spring 140.
is adapted to apply a biasing force in the return direction when the zoom switch lever 136 is held at the telephoto position. Further, the zoom switch lever 136 is provided with a movable contact piece 137, which together with a printed board 139 constitutes a teleswitch and a wide switch.

Furthermore, the pin 134 of the first slide lever 126 is connected to the main switch lever 146 connected to the main switch knob 146C:! #A1148 is engaged, and the main switch lever 146 takes two positions, the FF position and the ON position, and in each position, the protrusion 150A of the click lever 150 fits into the recesses 146A and 146B and is held. ing.

When the zoom operation knob 136A is moved from the neutral position N to the tele position T, the first slide lever 126, the switching lever 92, and the gear train 94. A telecast will be held.

On the other hand, when the zoom operation knob 136A is moved from the neutral position N to the wide position W, the first slide lever 12
6 moves the pin 124 to the left, the switching lever 92 rotates in the CCW direction about the shaft 80A, and the gear 98 of the wide side gear series moves to the gear 100.
At the same time, the wide switch is turned on and the motor lO is driven in the opposite direction to perform wide operation.

Next, the rewinding mechanism will be explained. The gear 34 of the rewind vi structure is connected to gears 152, 154, 156, 158, and 160, and a cartridge fork 162 that engages with the core of the film cartridge is provided on the lower surface of this gear 160.

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

First, the film winding operation will be explained. Spring 44 of lock lever 38 and spring 48 of torque detection lever 46
The locking lever 38 and the torque detection lever 46 take the positions shown in FIGS. 1 and 2 due to the urging force of the spring 36, so that the arm 28 resists the urging force of the spring 36 and is in the position shown in FIG. Therefore, the planetary gear 30 meshes with the gear 32 of the film winding mechanism. When the motor 10 rotates forward (CW direction) in this state, gear 12-14-16→1
The rotational force is transmitted to the film winding mechanism through a gear series of 8→20-22→24→26-30-32. As a result, the gear series of the film winding mechanism 32-70→74→
78 causes the spool 76 to rotate in the CCW direction, and a film (not shown) is wound onto the spool 76.

The film rewinding operation is performed as follows. When shooting is finished and the entire length of the film has been wound onto the spool 76, the film end is engaged with the core inside the film cartridge, and when the film winding is finished, the spool 76 rotates despite the rotational force of the motor 10. becomes incapable. If motor 1O still tries to rotate in this state, motor 1
The torque detection lever 46 moves to the second position due to the rotational torque from 0.
As shown by the imaginary line in the figure, it rotates in the CCW direction about the shaft 22A against the biasing force of the spring 48. When the torque detection lever 46 rotates in the CCW direction, the locking lever 38 is in contact with the pin 52 of the torque detection lever 46, so the shaft 4
2 in the CW force direction against the biasing force of the spring 44. When the locking lever 38 rotates in the CW force direction, the engagement between the pin 40 of the locking lever 38 and the end 28A of the arm 28 is released, and the arm 28 moves as shown by the first quadrant in FIG. The spring 36 rotates the planetary gear 30 in the CCW direction about the shaft 26A, and the rotation of the sun gear 26 causes the planetary gear 30 to rotate in the CCW direction.
It revolves in the direction and comes to mesh with gear f34 of the rewinding mechanism. As a result, the motor 10 and the rewinding mechanism are connected, and the gear series 12-14→16→18→20→22→2
4→26-30-34→152→154→156-15
The cartridge fork 162 is rotated by 8-160,
The film will be rewound into the cartridge.

In this way, the film is wound onto the spool 76 by the forward rotation of the motor lO, and when the end of the film is detected after winding the film, the torque detection lever 46 is actuated and the motor lO
The film can be rewound into the cartridge in the forward rotation direction of 0. In other words, both film winding and rewinding operations can be performed by forward rotation of the motor IO.

Next, the operation of the focal length switching mechanism will be explained.

First, the zoom operation knob 136A is set to the 22-tral position N.
, the zoom direction switching lever 92 is located on the tele side due to the action of the spring 93 as described above, but the tele switch and wide switch are OFF, and the motor 10
does not rotate. Next, move the zoom knob 136A to the spring 14.
When held at the tele position T against the biasing force of 0, the tele switch is turned on and the motor lO rotates in the reverse direction (CCW direction rotation).
The rotational force from the motor 10 is transferred from the gear 12 to 14-16.
→ 18-20 → 22 → 24-26 → 30 → 32j The rotational force in the CW force direction is transmitted to the gear 32 from two. When the gear 32 rotates in the CW force direction, the planetary gear 74 rotates in the CCW direction, which causes the arm 72 to move in the Ctt direction! Rotate twice,
The planetary gear 74 comes to mesh with the gear 80 of the focal length switching mechanism. When the gear 7'4 meshes with the gear 80, the switching lever 92 is already located on the telephoto side, so the rotational force from the motor 10 is changed from gear 80→94→96→100→
102-104→106-108→110, the lever 114 is rotated in the CW force direction about the shaft 114A. This causes the lens barrel 120 to be extended.

Next, when the zoom operation knob 136A is positioned at the wide position Hw, the first slide lever 126 moves to the left,
As a result, the switching lever 92 moves CCW around the shaft 8QA.
As the gear 96 moves away from the gear 100, the wide planetary gear 98 comes to mesh with the gear 100. At the same time, the wide switch is turned on and motor 10
is reversed, and as a result, the rotational force from the motor 10 is transferred to the gear 8.
0→98→100-102-104-106-108→
110 series, and the lens barrel delivery lever 11
4 rotates in the CCW direction about the axis 114A, and the lens barrel 120 is retracted.

Next, when the main switch knob 146C is set to the OFF position, as the main switch lever 146 moves, the first
The slide lever 126 moves to the left, and the switching lever 92 is switched to the wide side via the bin 124. Also, turn the main switch knob 146C from the ON position to the OFF position.
When switching to the position, a lens barrel storage process to be described later is executed, the motor 10 is driven in reverse to retract the lens barrel 120 further than the wide end, and then a barrier (not shown) is closed.

Next, a control device for the motor IO will be explained.

FIG. 5 is a block diagram showing an example of a motor control device, and this device includes a camera control section 200, a motor control circuit 202, a motor drive circuit 204, a main switch 206, a back cover switch 208, and a teleswitch 21O.
, wide switch 212, film advance detection switch 2
14, an auto-return detection switch 216, an encoder 218, and the like.

The camera control unit 200 performs sequential control of the motor lO, automatic focus adjustment device, automatic exposure device (not shown), and camera operation according to the present invention, and stores programs and data necessary for each control. It has memory and solid equipment to The motor control circuit 202 is
The motor drive circuit 204 is connected to the camera control 8B 200 and applies switch signals from the above-mentioned switches to the camera control unit 200, and also sends signals MF and MZ for controlling the motor IO according to processing to be described later by the camera control unit 200. Output to. The motor drive circuit 204 operates the motor 10 as shown in the following table based on a combination of manually input signals MF and MZ.

Table 1: When the signals MP and MZ are both "L", the motor 10 is stopped; when the signals MF and MZ are "H" and "L", the motor 10 is rotated clockwise (CW);
When the signals MF and MZ are “L” and “H”, the motor 10
counterclockwise (CCW), and the signals MF and M
When both Z are "H", the motor 10 is braked.

In addition, the operating state of each switch and its switch signal (S
M 1S B SST s SW SS OSS R
) and encoder signals (EA, EB, EC
) and the lens barrel position are shown in Tables 2 and 3, respectively.

Table 2 Table 3 Note that the encoder 218 has an electrode pattern of the code shown in Table 3 formed on the encoder gear 110 (FIG. 1), and the encoder 218 has a 3-bit position according to the rotational position of the encoder gear 110. Data is output.

Next, the processing procedure for driving and controlling the motor 10 will be explained with reference to the flowcharts shown in FIGS. 6 to 9.

In FIG. 6, in step 300, the camera back switch is turned OFF.
It is determined whether the camera back has been switched from FF to ON, that is, whether the camera back has changed from open to closed. When the camera back switch is switched from OFF to ON, "initial film set processing (FFS processing)", which will be described later, is performed. Execute the subroutine and return to the start again. Similarly, in step 302, it is determined whether the main switch has been switched from ○:< to OFF.
In step 304, it is determined whether the main switch has been switched from OFF to ON. In step 306, it is determined whether frame advance is to be performed after the shirt release. In step 308, it is determined whether the teleswitch is ONL. Pu 31
0: It is determined whether the id switch is turned on or not, and when it is "YES", the "lens barrel storage process" described later is carried out.
``lens barrel set processing'', ``frame advance processing'', ``tele processing'',
After executing the "wide processing" subroutine, the process returns to the start again.

Now, in step 300, turn the camera back switch from OFF to ON.
When it is determined that the switch has been made, the “FF” shown in FIG.
In this case, as shown in the figure, the signal MF is first switched from "L" to "H" and a timer is set (steps 400 and 402).This causes the motor drive circuit 204 to applied signal M
Since F and MZ become "H" and "L", respectively, the motor IO is rotationally driven in the CW force direction as shown in Table 1.

By this rotation of the motor 10 in the CW force direction, the film is wound up by the spool 76 as described above.

After setting the timer, it is determined whether or not a film advance signal 5O (1 pulse for one frame advance) is generated within a certain period of time (5 seconds) in steps 404 and 406.
), if the signal SO occurs, reset the timer (step 408), if the total number of pulses of the signal SO is 4.
It is determined whether it has become (step 410). Signal S
If the number of O pulses is less than 4, the process returns to step 404 and the signal SO is detected.

In this way, when the number of pulses of the signal SO reaches 4, that is, when the film has been wound for 4 frames, the signal MZ is switched from "L'" to "H", and both signals MF and MZ are set to "H". and applies the brake to the motor 10 (step 412).After applying the brake for a certain period of time (approximately too many seconds) (step 414), the signals MF and MZ
Both are set to “L”, and the motor 10 is stopped.
Step 416), return to start. Note that if the film advance signal SO is not generated even after the film winding operation is performed for 5 seconds, the process proceeds from step 406 to step 412, and the motor 10 is stopped.

Next, in step 302, the main switch is turned on.
When it is determined that the switch has been made to F::' will be explained. In this case, the "lens barrel storage process" shown in FIG. 9 is executed.

That is, first, the signal MZ is switched from "L" to "H" and a timer is set (steps 600 and 602).
). As a result, the signals MF and MZ applied to the motor drive circuit 204 become "L" and "H", respectively, so that the motor IO is rotationally driven in the CCW direction as shown in Table 1. Due to the rotation of this motor lO in the CCW direction,
The arm 72 rotates in the CW force direction, the planetary gear 74 meshes with the gear 80 of the focal length switching mechanism, and the main switch changes from ON to OFF, and as described above, the switching lever 92 is turned by the main switch lever 146. is located on the wide side, so the lens barrel is on the wide side (
storage side).

Then, in step 60, it is determined whether the lens barrel position has been at the home position (HP) for a certain period of time (3 seconds).
4.606), when the lens barrel position reaches HP, the signal MF is set to L'.
to “H2” (step 610), and the signal ~IF
and MZ are both set to 1H" to apply the brake to the motor 10, and after applying the brake for 100 m seconds (step 620
), both signals MF and MZ are set to "L" to bring the motor 10 to a stopped state (step 630). Incidentally, when the lens barrel is positioned at the home position further in the depth direction than the wide end, the barrier (not shown) automatically closes.

Further, when 3 seconds have elapsed after the start of the "lens barrel storage process", the process proceeds from step 606 to step 610, and the motor IO is stopped even if the encoder does not raise the HP.

Next, in step 304, the main switch is turned from OFF to OFF.
A case where it is determined that the mode has been switched to N will be explained. In this case, Figure 9! The "lens barrel setting process" shown in 2 is executed.

That is, first, the signal MZ is switched from "L" to "H" and a timer is set (steps 700 and 702).
). As a result, the motor lO rotates in the CCW direction, and the planetary gear 74 engages with the gear 80 of the focal length switching mechanism, as in the above-mentioned "lens barrel storage process".Meanwhile, the main switch is switched from OFF to ON. Since the switching lever 92 is located on the telephoto side, the lens barrel moves to the telephoto side.

Then, it is determined whether the lens barrel position has reached the wide end within a certain period of time (3 seconds) (steps 704 and 706), and when the encoder reaches the wide end (or after setting the timer),
After 3 seconds have elapsed, the motor 10 is stopped in the same way as described in v1.

Next, a case where it is determined in step 306 to perform frame advance after shirt release will be described. in this case,
"Frame advance processing" shown in FIG. 8 is executed.

That is, first, the signal MP is switched from "L" to "H" and a timer is set (steps 500 and 50).
2). As a result, the signals MF and MZ applied to the motor drive circuit 204 become "H" and "L", respectively, so that the motor 10: C' is rotationally driven in the j direction. This rotation of the motor 10 in the CW direction causes the take-up spool 76 to rotate and the film to be wound.

On the other hand, during this time, whether or not the film advance signal SO was generated (step 504), whether 5 seconds had elapsed after the timer was set (step 506), and whether the auto return signal SR was generated after the film winding was completed (step 506). Step 50
8) is determined. Then, when the film advance signal SQ is generated or when 5 seconds have elapsed after the timer was set, the signal MZ is switched from "L" to "H" (step 5).
1O), apply the brake to the motor 10, and apply the brake to the motor 10.
After 100 msec (step 512), the signal MF
and MZ are both set to "L" to bring the motor 10 to a stopped state (step 514).

In addition, when the auto return signal SR is generated, the film winding is completed, the torque detection lever 46 is activated, and the film is rewound into the cartridge by the rotation of the motor 10 in the CW force direction. A film advance signal SO is generated each time the film is rewound. Therefore, in this case, the timer should be set again in step 516.
), within 5 seconds after this timer set! Step 518. Determine whether or not the film feed signal SO is generated.
520), when the film advance signal S○ is generated, the timer is set again.

If the film advance signal S○ is not generated within 5 seconds after setting the timer, it is determined that rewinding has been completed, and the process proceeds to step 510, where the motor 10 is stopped.

Next, a case where it is determined in step 308 that the teleswitch is ON will be described. In this case, the "tele processing" shown in FIG. 9 is executed.

That is, the signal MZ is switched from "L" to "H" (step 800), the signals MF and MZ are set to "L" and "H", respectively, and the motor IO is rotated in the direction of "CC". As the motor 10 rotates in the CCW direction, the arm 72 rotates in the CW force direction, the planetary gear 74 engages with the gear 80 of the focal length switching mechanism, and the zoom switch lever 136 rotates in the neutral and telephoto directions. When the lens is in the telephoto position, the switching lever 92 is located on the telephoto side, and the lens barrel moves to the telephoto side.

Then, it is determined whether the lens barrel has reached the telephoto end (step 802).
), and it is determined whether the tele switch is still ON (step 804), and if the tele end is reached or the tele switch is turned off, the process proceeds to step 610, where the motor 10 is stopped and the tele side of the lens barrel is turned OFF. Stop moving to.

Next, a case where it is determined in step 310 that the wide switch is ON will be described. In this case, the "wide processing" shown in FIG. 9 is executed.

That is, along with the above-mentioned "tele processing", the signal MZ is switched from "L" to "H" (step 900), and the signals ~iF and M
Set Z to "L" and "H" respectively, and motor 10 to CCW.
direction. This rotation of the motor IO in the CCW direction causes the arm 72 to rotate in the CW force direction, and the planetary gear 74
is engaged with the gear 80 of the focal length switching mechanism, and on the other hand, the zoom switch lever 136 moves in the wide-angle direction and the switching lever 92 is positioned on the wide-angle side, so that the lens barrel moves towards the wide-angle side.

Then, it is determined whether the lens barrel has reached the wide end (step 90).
2>, it is determined whether the wide switch is still ON (step 904), and if the wide end is reached or the wide switch is turned OFF, the process proceeds to step 610 and the motor lO is stopped, and the wide side of the lens barrel is turned OFF. Stop moving to.

Note that the mechanism for converting rotational motion into linear motion and moving the lens barrel forward and backward is not limited to this embodiment, and various other mechanisms can be considered. Further, in this embodiment, the gear on the telephoto side is configured to always mesh with the succeeding gear, but the gear on the wide side may be configured to always mesh with the following gear. However, in this case, it is necessary to switch to the tele side by turning the main switch ON.

〔Effect of the invention〕

As explained above, according to the electric device for a camera according to the present invention, it is possible to change the focal length by moving the photographing lens forward and backward by rotating the electric motor in one direction, and also to change the focal length by rotating the zoom operation knob and the main switch knob. The rotation direction can be switched by each of these knobs without interfering with the operation of the rotor. Thereby, the photographing lens barrel can be set at a desired position (collapsed or wide end) in conjunction with the operation of the main switch knob.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the electric device for a camera according to the present invention, FIG. 2 is a plan view showing the operation of the torque detection mechanism in film winding mode, and FIG. An explanatory view showing the button mechanism, FIG. 4 is a plan view showing a state in which the back cover is opened and reset is performed, FIG. 5 is a block diagram showing an example of a control device for a camera electric device according to the present invention, and FIG. 9 to 9 are flowcharts showing the motor control procedure by the control device of FIG. 5, respectively. 10...Electric motor, 92...Switching lever,
93...Spring, 120...Lens mirror,
124... Pin, 126... First slide lever, 136... Zoom switch lever, 136A
...Zoom operation knob, 138...Second slide lever, 146...Main switch lever, 1
46C...Main switch knob.

Claims (1)

[Scope of Claims] A motorized device for a camera in which the focal length is changed by advancing and retracting a photographing lens barrel by rotation of an electric motor in one direction, comprising: 1 gear, and is rotatably provided around the first gear, and is rotatable around the first gear to move the photographic lens barrel forward and backward. a switching means for switching and transmitting rotation in the same direction or the opposite direction to that of the first gear to a second gear; and rotating the switching means in a predetermined direction so as to rotate the subsequent second gear in a fixed direction. a zoom operation knob that can take a wide position, a neutral position, and a telephoto position by manual operation; a main switch knob that can take an ON position and an OFF position by manual operation; It has an engaging member that engages with end faces in the same direction of the connected lever and the lever connected to the main switch knob, and when the zoom operation knob is operated to one of a wide position and a tele position. Only when the main switch knob is operated to either the OFF position or the ON position, each operating force is transmitted to the switching means via the engaging member, and the switching means is An electric device for a camera, comprising: power transmission means that rotates against the urging force of the urging means to reverse the rotational direction of the second gear.