JP3537212B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly, to a camera having a drive mechanism for selecting and driving a plurality of driven systems.

[0002]

2. Description of the Related Art A power split device for a camera disclosed in Japanese Patent Application Laid-Open No. 4-258934, which has been proposed as a camera drive mechanism for transmitting the power of a drive motor by selecting one of a plurality of driven parts, has been proposed. A drive mechanism using a planetary gear mechanism is applied. When the electromagnetic actuator is turned on, it is revolved by the power of the motor to select a driven gear, and when the electromagnetic actuator is turned off, power is transmitted to the selected driven gear. It concerns the mechanism.

The drive mechanism of an electric camera disclosed in Japanese Utility Model Laid-Open Publication No. 61-206939 employs two electromagnetic locking mechanisms and two planetary clutch mechanisms, and uses a single motor to drive a plurality of driven motors. The present invention relates to a mechanism for selecting and transmitting a gear.

[0004]

However, in the mechanism disclosed in Japanese Patent Laid-Open No. 4-258934, since each driven gear must be arranged around the revolution of the planetary gear, a large space is required. However, it has been difficult to reduce the size of the camera. In the camera driving mechanism disclosed in Japanese Utility Model Laid-Open No. 61-206939, during motor driving,
It is necessary to energize the electromagnetic force, which increases power consumption, and requires a plurality of electromagnetic actuators in the electromagnetic locking mechanism, which is disadvantageous in cost.

[0005] In view of the above problems, the present invention can switch power transmission to a plurality of driven parts using a single electromagnetic means without using a complicated switching mechanism, thereby reducing power consumption. It is an object of the present invention to provide a camera which is small, occupies a small space, and is cost-effective.

[0006]

A camera according to the present invention comprises a single motor and forward and reverse rotation by the motor.
A first sun gear, a first planetary gear that always meshes with the first sun gear, the first sun gear, and the first sun gear .
A first connecting arm for connecting the rotation axis of the primary planetary gears,
When the first sun gear is rotated in one direction, the first sun gear
The first planetary gear is revolved and displaced.
The second thick plate capable of transmitting the driving force from the
When the positive gear and the first sun gear are rotated in the other direction
When the first planetary gear revolves and displaces,
The driving force from the first planetary gear can be transmitted.
And always mesh with the third sun gear
A second planetary gear , the second sun gear, and the second
A second connecting arm for connecting the rotation shaft with the planetary gear ;
A third planetary gear that always meshes with the third sun gear ;
A link is established between the rotation axes of the third sun gear and the third planetary gear.
A third connection arm of the binding, the by first to lock the third connection arm of the plurality can be displaced into a state that allows the state to prohibit the revolution of the people first to third planetary gears husband a scan <br/> stopper member and the prohibit the plurality of stopper members
A single that can be displaced between a state and an acceptable state
Electromagnetic means , one connecting arm of the plurality of connecting arms,
Position of one stopper member of the plurality of stopper members
Position and switch the transmission destination of the driving force of the motor
Control means .

In the present camera, the control means includes
One connecting arm of the plurality of connecting arms and the plurality of stoppers
Determine the position of one of the stopper members, and
Switches the transmission destination of the driving force of the motor.

[0008] In addition, the camera according to the present invention, a single mode
And a first sun gear rotated forward and reverse by the motor
And a first planetary gear that always meshes with the first sun gear
When the rotation of the said first sun gear and said first Yu star gear
A first connecting arm connecting between the shafts and the first sun gear;
When rotated in one direction, the first planetary gear revolves
By the displacement, the driving force from the first planetary gear is transmitted.
A second sun gear capable of being
When the sun gear is rotated in the other direction, the first planetary gear
Are revolved and displaced, so that the drive from the first planetary gear
A third sun gear through which power can be transmitted;
A second planetary gear that always meshes with the second sun gear;
Between the rotation axes of the second sun gear and the second planetary gear
A second connecting arm connecting the third sun gear and the second connecting arm
A third planetary gear meshing with the third sun gear and the third planetary gear;
A third connecting arm for connecting between the rotating shaft with the third planetary gear
And the first connecting arm is capable of locking the revolving rotation of the first connecting arm.
And the position of the first connecting arm in the rotation locus of the first connecting arm.
A position outside the rotation locus of the first connecting arm so as to allow the rotation
A first stopper member which is displaceable to the
Rotation of the second connection arm so that the revolving rotation of the connection arm can be locked.
Allows the position in the trajectory and the revolving rotation of the second connecting arm
And the position outside the rotation locus of the second connecting arm.
Revolving of the existing second stopper member and the third connecting arm
Position in the rotation locus of the third connecting arm so that movement can be locked
And the third connecting arm is allowed to revolve around the third connecting arm.
The third arm, which can be freely displaced,
A topper member , the second stopper member, and the third
Position the stopper member within the rotation locus of the first and second connecting arms.
Or, biasing toward one position outside the rotation locus
Means, and the first stopper member is connected to the first connecting arm.
Drive displacement between a position inside the rotation locus and a position outside the rotation locus
A single electromagnetic means .

In the above camera, the first stopper
Drive change of the member to a position within the rotation locus of the first connecting arm
The second stopper member and the third
Of the first and second connecting arms by the stopper member
Displace to one position inside or outside the rotation trajectory.
The first stopper member is located outside the rotation locus of the first connecting arm.
The second stopper portion is interlocked with the drive displacement to the position.
Material and the third stopper member against the urging means.
Inside or outside the rotation locus of the first and second connecting arms
To the other position.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 are enlarged perspective views showing a configuration of a driving device built in a camera and a driving state according to an embodiment of the present invention. FIGS. 5 to 11 are plan views showing the operation state of the camera driving device of the present embodiment. Figure 1 above
11 to 11, a description will be given of the configuration of a driving device that performs the forward / backward drive of the lens barrel, the film winding / rewinding drive in the camera of the present embodiment. The driving device is arranged so that the camera body is located above the driving device in the perspective view.

The single motor 20 as a drive source is a motor having a pinion gear 21 on its output shaft and capable of rotating forward and reverse. The pinion gear 21 meshes with the first sun gear 30 via a reduction gear train (not shown), and transmits the rotational force of the motor 20 to the first sun gear 30. On the upper surface of the first sun gear 30, a first gear arm 32, which is a connecting arm, is provided, and is rotatable coaxially with the first sun gear 30. A pivot pin 32a is suspended from the first gear arm 32, and a first pin is
A planet gear 31 is axially mounted in a state of meshing with the first sun gear 30.

The first planetary gear 31 is provided with the first planetary gear 31.
There is a predetermined friction (not shown) between the gear arm 32 and the gear arm 32. Therefore, when the first sun gear rotates, the force of the friction causes the first gear arm 32 to generate a rotating force in the direction in which the first sun gear 30 rotates. The first gear arm 32 has the first
Protrusions 32b, 32 for stopping the rotation of the gear arm 32
c and clutch PI (photo interrupter) described later
A light-shielding portion 32d that shields light from the light-receiving portion 34 is provided.

On the revolving locus of the first planetary gear 31, a gear 36, which is a driven gear, which is axially mounted on a support shaft 36a, and a third sun gear 60, which is also a driven gear which is axially mounted on a support shaft 60a.
Are arranged. A first stopper 35 serving as a stopper member is rotatably supported coaxially with the gear 36 on the support shaft 36a.

As shown in FIG. 5B, the first stopper 35 has a counterclockwise rotation (hereinafter referred to as C) of the first gear arm 32.
As shown in FIG. 6B, a locking portion 35a is provided for locking and stopping the rotation of the first gear arm 32 in the clockwise direction (hereinafter referred to as CW). Around the first gear arm 32, positioning members 33a and 3a
3b, which regulate the rotation of the first gear arm 32 in the CW direction as shown in FIG. 5A and the rotation in the CCW direction as shown in FIG.

The gear 36 meshes with a gear 37 pivotally mounted on a support shaft 37a, and the gear 37 meshes with a second sun gear 38 pivotally mounted on a support shaft 38a. A second gear arm 45, which is a connecting arm, is provided below the second sun gear 38, and is rotatable coaxially with the second sun gear 38. A shaft pin 45a is suspended from the second gear arm 45, and a second planetary gear 47 meshes with the second sun gear 38 and is axially mounted on the shaft pin 45a.

The second planetary gear 47 has a predetermined friction (not shown) between itself and the second gear arm 45.
have. Therefore, when the second sun gear 38 rotates, the force of the friction generates a rotating force in the second gear arm 45 in the direction in which the second sun gear 38 rotates. On the revolving locus of the second planetary gear 47, a set gear 48, which is a driven gear pivotally mounted on the support shaft 48a, and a gear 49, which is a driven gear pivotally mounted on the support shaft 49a, are arranged.

The gear 49 is a step gear 5 which is a reduction gear.
Rotating power is transmitted to the rewind gear 51 as a rewinding drive mechanism via 0,50 '. The gear 51 is provided with a claw (not shown) which is engaged with a spool shaft in the cartridge and rewinds the film. When the rewind gear 51 rotates in the CW direction, the film is wound in the cartridge. Will be returned.

The set gear 48 moves the lens frame from the retracted position to the photographing position (hereinafter, this operation is referred to as a set-up operation), and moves the lens frame from the photographing position to the retracted position (hereinafter, this operation is set). -Described as a down operation). That is, it is connected to a set driving system gear train terminating at a set gear for set driving on the lens barrel side, and the lens frame is set up by rotation of the gear 48 in the CW direction, and is rotated by rotation in the CCW direction. The mirror frame operates to set down.

A support shaft 41a is disposed at a lower position where it does not interfere with the second sun gear 38, and a second stopper 41 as a stopper member is rotatably supported on the support shaft 41a. . The second stopper 41 has a locking arm 41d that locks and prevents the rotation of the second gear arm 45 in the CW direction as shown in FIG. In addition, the second
Positioning members 43 and 44 are provided around the gear arm 45. As shown in FIG.
The rotation in the W direction and the rotation in the CCW direction of the second gear arm 45 are restricted as shown in FIG. Further, the second stopper 41 has a light shielding portion 41b for shielding a stopper PI (photo interrupter) 46 described later.

Below the third sun gear 60, there is provided a third gear arm 61 as a connecting arm, which is rotatably supported coaxially with a support shaft 60a of the sun gear 60. The third gear arm 61 has a support shaft pin 61b suspended therefrom. The third planetary gear 62 and the gear 62 ', which are integral step gears, mesh with the third sun gear 60 on the support shaft pin 61b. , Is attached to the shaft. However, the third planetary gear 62 meshes with the third sun gear 60.

The third planetary gear 62 and the gear 62 '
Is provided with a predetermined friction (not shown) between itself and the third gear arm 61. Therefore, when the third sun gear 60 rotates, the force of the friction causes
The third gear arm 61 generates a rotating force in the direction in which the third sun gear 60 rotates.

On the revolving locus of the third planetary gear 62, a zoom gear 65, which is a driven member,
And a driven member integrated with a spool for winding the film, and a wind gear 7 as a winding mechanism.
0 is provided. The gear 65 is a gear 37, 3
8 is located at a position that does not interfere with the gears 37 and 38.

The zoom gear 65 is connected to a later-described zoom system gear train for zooming the lens barrel. The rotation of the gear 65 in the CW direction causes the lens frame to zoom down, and the rotation in the CCW direction causes the lens frame to zoom. It is supposed to work up. Regarding the above-mentioned zoom gear train, an intermediate gear train is not shown, but the last gear is a zoom drive zoom gear on the lens barrel side. Of the third planetary gear 62 and the gear 62 ', which are the above-mentioned stepped gears, the third planetary gear 62, which is a large gear side thereof, can mesh with the zoom gear 65, and the gear 62', which is a small gear side, is a wind gear 70. It is possible to mesh.

A support shaft 72a is located below the second sun gear 38 and does not interfere with the second sun gear 38, and a third stopper 72 serving as a stopper member rotates on the support shaft 72a. Supported as possible. Third stopper 7
As shown in FIG. 6A, C of the third gear arm 61
A locking arm 72b for locking CW rotation is provided.

Positioning members 63 and 64 are provided around the third gear arm 61, as shown in FIG.
As shown in FIG. 7A, the rotation of the third gear arm 61 in the CW direction and the rotation of the third gear arm 61 in the CCW direction are restricted. The first stopper 35 is connected to the support shaft 3.
It is rotatable about 6a and has a vertically extending convex pin 35b. A plunger-type electromagnet 40 serving as electromagnetic means is disposed near the first stopper 35. The electromagnet 40 is provided with a movable core 40a that is attracted to the left in FIG. 5A when energized, and a compression spring 40b that urges the movable core 40a to the right in the drawing.

When the electromagnet 40 is not energized, the movable core 40a is pushed rightward in FIG. 5A by the compression spring 40b, and is moved by a positioning pin (not shown).
The position is regulated by hitting the position. Also, by making the force of the compression spring 40a weaker than the attraction force when the electromagnet 40 is energized, when the electromagnet 40 is energized, the movable core 40a is attracted to the left in FIG. (See FIG. 8A).

The movable iron core 40a of the electromagnet 40 has a notch at the tip, into which a convex pin 35b of the first stopper 35 is fitted. Therefore, the first stopper 35 rotates in the CCW direction when the electromagnet 40 is energized and the movable core 40a is attracted and moves leftward as in FIG. 5A. When the electromagnet 40 is turned off and the movable iron core 40a is pushed back to the right as shown in FIG. 5A by the force of the compression spring 40b, it rotates in the CW direction.

The locking portion 35 of the first stopper 35
An arm 35c is provided at the opposite end of the portion a. The arm 35c is located below the gear 37,
Does not interfere with The second stopper 41 is connected to the support shaft 4.
It is rotatable around 1a and has a gear portion 41f. The right end has an arm 41e.
Furthermore, it has a convex part 41d as a locking part.

A pin 42a is suspended from a main body (not shown) near the second stopper 41, and a torsion spring 42 is inserted into the pin 42a. One end of the torsion spring 42 is hung on the positioning member 43, and the other end is hooked on one end of the second stopper 41 to urge the stopper 41 in the CCW direction. The second stopper 41 is located below the gears 37 and 38 and is located at a position that does not interfere with the gears 37 and 38.

The third stopper 72 is connected to the support shaft 72a.
And a gear 72 at the center.
c is provided, and a locking arm 72b is provided at the right end, and an arm 72d is provided at the left end.

A positioning pin 73 is suspended from a main body (not shown) near the upper third stopper 72 to restrict the rotation of the third stopper 72 in the CW direction. The third stopper 72 is disposed below the gears 37 and 38 and is located at a position where it does not interfere with the gears 37 and 38.

The gear 41f of the second stopper 41 and the gear 72c of the third stopper 72 mesh with each other.
When the second stopper 41 rotates in the CW direction, the third stopper 72 rotates in the CCW direction. The second stopper 41 is biased in the CCW direction by the torsion spring 42, but is held at the position shown in FIG. 5A because the third stopper 72 is in contact with the positioning pin 73. Is done. The arm 4 of the first stopper 41
1e and the arm 35c of the first stopper 35 have a slight gap in the rotation direction, and are arranged at the same position in the height direction.

The electromagnet 40 is energized and the movable core 40
a is sucked leftward in the figure, the first stopper 35
Rotates in the CCW direction. At this time, the first stopper 35
Of the first gear arm 32, that is, even if the first gear arm 32 is rotated,
It turns to the position where 2b does not contact. Further, when the first stopper 35 rotates in the CCW direction, the arm 41c of the second stopper 41
Is rotated while pressing against the force of the torsion spring 42, so that the second stopper 41 rotates in the CW direction, thereby rotating the third stopper 72 in the CCW direction.

At this time, the locking arm 4 of the second stopper 41
Reference numeral 1d rotates to a position outside the rotation trajectory of the convex portion 45b for locking the rotation of the second gear arm 45, that is, to a position where the convex portion 45b of the second gear arm 45 does not come into contact even if rotated. The locking arm 72b of the third stopper 72 has a projection 61 for locking the rotation of the third gear arm 61.
It turns to the outside of the turning locus of b (see FIG. 8A).

When the electromagnet 40 is de-energized,
The movable core 40a is pushed back by the force of the compression spring 40b, whereby the movable core 40a protrudes to a position where it comes into contact with the positioning pin, and rotates the first stopper 35 in the CW direction. With the operation, the second stopper 41 and the third stopper 72 are rotated in the CCW direction and the CW direction by the force of the torsion spring 42 until the arm 72d of the third stopper 72 contacts the positioning pin 73. (See FIG. 5A). The locking arm 72 of the third stopper 72
b is above the arm 41e of the second stopper 41,
There is a slight gap in the thrust direction.

In the above drive device, the rewind gear 5
When 1 rotates in the CW direction, an operation of rewinding the film into the cartridge is performed. Also, if the set gear 48 is CW
If the set gear 48 is rotated in the CCW direction, a set-up operation is performed in which the lens frame is moved to the retracted position. Is performed.

When the zoom gear 65 rotates in the CW direction, a zoom-down operation of the lens frame at the protruding position is performed. When the zoom gear 65 rotates in the CCW direction, a zoom-up operation of the lens frame at the protruding position is performed. Done. When the wind gear 70 rotates in the CW direction, the film is wound up.

The above-described set-up operation or set-down operation is performed by the gears 36 and 3 constituting the first driving means.
7, a second sun gear 38, a second planetary gear 47, a second gear arm 45, and a set gear 48 by transmitting their driving force by a gear driving system. In the above-described zoom-down operation or zoom-up operation, the driving force of the third sun gear 60, the third planetary gear 62, the third gear arm 61, and the gear driving system of the zoom gear 65 constituting the second operation means is reduced. It is transmitted and performed.

Next, the driving operation and the driving force switching operation of the driving device configured as described above will be described with reference to FIGS. In FIG. 1 and FIG.
Turn on the power switch (not shown) of the camera,
0 in the CW direction, the first sun gear 30
Rotate in the direction. Then, the first gear arm 32 rotates in the CW direction, the projection 32c abuts on the positioning member 33b, and the first planetary gear 31 rotates in the CCW direction. Gear 3
The rotation of the second and third sun gears 38 and 37
The second gear arm 45 rotates in the W direction, and the second gear arm 45 rotates in the CW direction, so that the projection 45b abuts on the second stopper 41. Then, the second planetary gear 47 rotates in the CCW direction, and the set gear 48 rotates in the CW direction, thereby performing the set-up operation of the lens barrel.

After the above set-up operation, the zoom
When the switching operation to the up operation is performed, FIGS.
5A, the electromagnet 40 is turned on, and the movable iron core 40a is attracted to the left in FIG. 5A. The first stopper 35 rotates in the CCW direction, and the first stopper 35 pushes the second stopper 41. The second stopper 41 rotates in the CW direction,
The third stopper 72 rotates in the CCW direction (see the state in FIG. 8A). The attraction force of the electromagnet 40 is determined by the compression spring 4
0b and the spring force of the torsion spring 42.

At this time, the light shielding portion 41b of the second stopper 41
Enters the stopper PI 46 and turns off the signal from on. If the projecting portion 45b of the second gear arm 45 is engaged with the locking arm 41d of the stopper 41 and the movable iron core 40a cannot be attracted, the PI 46 does not change from on to off, and the state is not changed. Is detected, the energization of the electromagnet 40 is once turned off, the motor 20 is moved in the order of the predetermined amount CCW and CW, the above-mentioned biting state is loosened, and the electromagnet 40 is energized again,
The movable iron core 40 is sucked.

In the state shown in FIG. 8A, when the motor 20 is rotated in the CCW direction while the electromagnet 40 is energized,
The sun gear 30 rotates in the CCW direction. Since there is friction between the gear 36 and the main body (not shown), the first planetary gear 31 revolves around the sun gear 30 in the CCW direction while rotating around until it separates from the gear 36 (the state shown in FIG. 11A). ). Note that the friction torque of the gear 36 due to the friction force is set to be larger than the friction torque of the first planetary gear 31.

As shown in FIG. 11A, the first planetary gear 31
When the first gear arm 32 rotates in the CCW direction, the light shielding portion 32d of the first gear arm 32
Enter I34 to turn off the signal from on. The PI34
When the off signal is input to the controller 20, the electromagnet 40 is turned off while rotating the motor 20 in the CCW direction. When the energization of the electromagnet 40 is cut off, the movable iron core 40a is pushed back by the force of the compression spring 40b, and the locking portion 35a of the first stopper 35 comes into contact with the outer diameter side surface of the convex portion 32b of the first gear arm 32 (FIG. 1
1 (B) state). By setting the friction torque of the first planetary gear 31 larger than the torque acting on the first gear arm 32 via the first stopper 35 formed by the compression spring 40b and the torsion spring 42, the first gear arm 32 1 The stopper 35 rotates in the CCW direction with the stopper 35 kept in contact with the side surface.

Next, if a friction is provided between the third sun gear 60 and a main body (not shown), the first planetary gear 31 rotates again while rotating around the sun gear 30 with the CCW.
Orbit in the direction. The friction torque of the sun gear 60 due to the friction force is set to be larger than the friction torque of the first planetary gear 31. As it is
As the first gear arm 32 rotates in the CCW direction, the locking portion 35a of the first stopper 35 comes off the outer diameter side surface of the projection 32b of the first gear arm 32, and the movable core 40a is moved by the force of the compression spring 40b. Is pushed back to the position of the positioning part,
At the same time, the first stopper 35 is driven to rotate in the CW direction.

The second stopper 41 and the third stopper 7
2 is a positioning member 73 in which the arm 72d of the third stopper 72 is
Until it comes into contact with the torsion spring 42.
Further, at this time, since the light blocking portion 41b of the second stopper 41 escapes from the stopper PI46, the signal of the PI46 changes from off to on (the state of FIGS. 2 and 6B). The rotation of the motor 20 is stopped by detecting this signal.

The zoom-up operation of the lens barrel is shown in FIG.
In FIG. 6B, the rotation is performed by rotating the motor 20 in the CCW direction and rotating the first sun gear 30 in the CCW direction. Due to the rotation, the first gear arm 32 rotates in the CCW direction, and the protrusion 32 </ b> C
3a, the first planetary gear 31 rotates in the CW direction, and the third sun gear 60 rotates in the CCW direction. The third gear arm 61 rotates in the CCW direction, and the projection 61a
When the third planetary gear 62 comes into contact with the stopper 72 and rotates in the CW direction, and the zoom gear 65 rotates in the CCW direction, a zoom-up operation of the lens barrel is performed (the state of FIG. 6A).

The zoom-down operation of the lens barrel is performed by rotating the motor 20 in the CW direction and rotating the first sun gear 30 in the CW direction in FIGS. 2 and 6A. Due to the rotation, the first gear arm 32 rotates in the CW direction, and the projection 32b
5, and the first planetary gear 31 is connected to the CC
The third sun gear 60 rotates in the CW direction, the third gear arm 61 rotates in the CW direction, the third gear arm 61 abuts on the positioning member 63, and the planetary gear 6
2 rotates in the CCW direction, and the lens frame performs a zoom-down operation by rotating the zoom gear 65 in the CW direction (the state of FIG. 6B).

When switching to the film winding operation is performed after the above zoom up or zoom down operation, FIGS. 2 and 6 (A) or 6 (B)
By energizing the electromagnet 40, the movable iron core 40a is attracted and driven to the left. Then, the first stopper 35 is rotated in the CCW direction, and the second stopper 41 is pressed to rotate in the CW direction. The rotation causes the third stopper 72 to rotate in the CCW direction (the state of FIG. 8B).

At this time, the light shielding portion 41b of the second stopper 41
Enters the stopper PI 46 and turns off the signal from on.
At this time, the locking portion 72b of the third stopper 72 and the convex portion 61a of the third gear arm 61 bite, or the locking portion 35a of the first stopper 35 and the convex portion 32b of the first gear arm 32 bite. When the movable iron core 40a cannot be attracted, the state is detected by the PI 46 not changing from ON to OFF, the energization of the electromagnet 40 is once turned off, and the motor 20 is rotated by a predetermined amount in the order of CW direction and CCW direction. Then, the bite is loosened and the electromagnet 40 is energized again to suck the movable iron core 40a.

When the motor 20 is rotated in the CCW direction while the electromagnet 40 is energized in the state shown in FIG.
The first sun gear 30 rotates CCW. First gear arm 3
2 is applied to the positioning member 33a, and the first planetary gear 31
Is rotated in the CW direction, the third sun gear 60 is rotated in the CCW direction, and the third gear arm 62 is rotated in the CCW direction.

The third planetary gear 62 as a step gear and the gear 6
2 ', the planetary gear 62 is farther from the zoom gear 65, and when the third gear arm 62 comes into contact with the positioning member 64, the gear 62' of the third planetary gear 62 and the gear 62 '.
Is engaged with the wind gear 70 (FIG. 9A). The amount by which the third planetary gear 62 and the gear 62 'switch from the zoom gear 65 to the wind gear 70 is set by the rotation amount of the motor 20, and after the motor 20 is rotated by the set amount, the electromagnet 40 The energization is stopped (FIGS. 3 and 7 (A) state).

The film winding operation is shown in FIGS.
In (A), when the motor 20 rotates CCW, the first
The sun gear 30 rotates in the CCW direction, and the first gear arm 3
2 rotates in the CCW direction, and the projection 32c
3a, the first planetary gear 31 rotates in the CW direction, and the third sun gear 60 rotates in the CCW direction. The third gear arm 61 rotates in the CCW direction, and the third gear arm 6
1 comes into contact with the positioning member 64, and the third planetary gear 62 and the gear 62 'rotate in the CW direction. Third planetary gear 62 '
Rotates the wind gear 70 in the CCW direction to wind up the film.

When switching to the zoom operation is performed after the film winding operation, when the motor 20 is rotated in the CW direction in FIGS. 3 and 7A, the first sun gear 30 rotates in the CW direction. And the first gear arm 32 is CW
The first gear arm 32 is rotated in the first direction.
The first planetary gear 31 rotates in the CCW direction, and the third sun gear 60 rotates in the CW direction.

By making the friction torque between the third planetary gear 62 and the gear 62 ′ larger than the torque acting on the third stopper 72 of the torsion spring 42, when the third sun gear 60 rotates in the CW direction, the third The gear arm 61 rotates in the CW direction while pressing the side surface of the third stopper 72 with the convex portion 61a (the state shown in FIG. 10A). By this rotation, the third stopper 72 rotates in the CCW direction, and the second stopper 41 rotates in the CW direction. The second stopper 41 is C
By rotating in the W direction, the light blocking portion 41b of the second stopper 41 enters the stopper PI46.

When the third gear arm 61 is
When the torsion spring 42 rotates in the W direction, the third stopper 72 comes off the projection 61 a of the third gear arm 61.
With this force, the second stopper 41 is turned in the CCW direction, and the third stopper 72 is turned in the CW direction. Also, at this time, since the light blocking portion 41b of the second stopper 41 protrudes from the stopper PI46, the signal of PI46 is turned on from off. The rotation of the motor 20 is stopped by detecting this signal (FIG. 6B).

In the case of performing a switching operation for switching from the zoom operation to the set-down operation, after the zoom-down of the lens frame is completed, the electromagnet 40 is energized and the movable iron core 40a is attracted as shown in FIGS. , First stopper 35
Rotates in the CCW direction, and the first stopper 35 presses the second stopper 41, whereby the second stopper 41 rotates in the CW direction and the third stopper 72 rotates in the CCW direction (FIG. 8).
(B) state).

At this time, the light blocking portion 41b of the second stopper 41
Enters the stopper PI 46 and turns off the signal from on. The convex portion 72b of the third stopper 72 and the third gear arm 6
The first protrusion 61b is bitten or the first stopper 3
5 and the convex portion 32b of the first gear arm 32 bite, and the movable iron core 40a cannot be attracted.
Since the state of I46 does not change from on to off, the state is detected, and the energization of the electromagnet 40 is once turned off, and the motor 2
0 is moved in the order of the predetermined amounts CW and CCW to loosen the bite, and the electromagnet 40 is energized again to attract the movable iron core 40a.

When the motor 20 is rotated in the CW direction while the electromagnet 40 is energized in the state shown in FIG.
The sun gear 30 rotates in the CW direction. Third sun gear 60
The first planetary gear 31 first revolves around the first sun gear 30 in the CW direction while rotating and moving away from the third sun gear 60 because there is friction between the first sun gear 30 and the third sun gear 60 (FIG. 11 (A) state). The friction torque of the third sun gear 60 due to the friction force is set to be larger than the friction torque of the first planetary gear 31.

As shown in FIG. 11A, the first gear arm 32
Is turned in the CW direction, the light shielding portion 32d of the first gear arm 32 is released from the clutch PI34, and turns on the signal from off. When the PI 34 receives an ON signal, the motor 20
Is turned in the CW direction, and the energization of the electromagnet 40 is cut off. When the energization of the electromagnet 40 is cut off, the movable iron core 40a is pushed back by the force of the compression spring 40b, and the locking portion 35a of the first stopper 35 abuts against the side surface of the convex portion 32b of the first gear arm 32 (FIG. )Status).

By setting the friction torque of the first planetary gear 31 to be larger than the friction torque acting on the first gear arm 32 of the first stopper 35 by the compression spring 40b and the torsion spring 42, the first gear arm 32 becomes the first gear arm 32. The stopper 35 rotates in the CW direction while keeping the stopper 35 in contact with the side surface.

Subsequently, since the friction is provided between the gear 36 and the main body as described above, the first planetary gear 31 rotates around the first sun gear 30 again while rotating again.
Revolves in the W direction. The first gear arm 32 remains CW
In the direction, the locking portion 35a of the first stopper 35
Is disengaged from the side surface of the convex portion 32b of the first gear arm 32, the movable iron core 40a is pushed back to the position of the positioning portion by the force of the compression spring 40b, and at the same time, the first stopper 35 is rotated in the CW direction.

The third stopper 41 and the third stopper 7
2 is rotated by the force of the torsion spring 42 until the arm 72d contacts the positioning member 73. Further, at this time, since the light blocking portion 41b of the second stopper 41 escapes from the stopper PI46, the signal of the PI46 changes from off to on (the state of FIG. 1 and FIG. 5A). The rotation of the motor 20 is stopped by detecting this signal.

When the motor rotates in the CCW direction in FIG. 5A, the first sun gear 30 rotates in the CCW direction,
The first gear arm 32 rotates in the CCW direction, and
Abuts against the first stopper 35, and the first planetary gear 31
By rotating in the W direction and rotating the gears 36 and 37, the sun gear 38 rotates in the CCW direction, the second gear arm 45 rotates in the CCW direction, and the second gear arm 45 abuts on the positioning member 44. . Then, the planetary gear 47 rotates in the CW direction, and the set gear 48 rotates in the CCW direction, thereby performing the set-down operation of the lens barrel (the state of FIG. 5B).

When performing the switching operation from the set-down operation to the film rewinding operation, the electromagnet 40 is energized to suck the movable iron core 40a in FIGS. 1 and 5B. The first stopper 35 rotates in the CCW direction, and when the first stopper 35 pushes the second stopper 41,
The stopper 41 rotates in the CW direction, and the third stopper 72 rotates in the CCW direction (FIG. 8A).

At this time, the light shielding portion 41b of the second stopper 41
Enters the stopper PI 46 and turns off the signal from on. The locking arm 41d of the second stopper 41 and the second gear arm 45 and the convex portion 45b bite, or the locking portion 35a of the first stopper 35 and the convex portion 32b of the first gear arm bite and the movable iron core 40a If can not be sucked, the above P
The state is detected by the fact that I46 does not change from on to off, and the energization of the electromagnet 40 is once turned off, and the motor 2
0 is moved in the order of CCW and CW in a predetermined amount to loosen the bite, and the electromagnet 40 is energized again to attract the movable iron core 40a.

When the motor 20 is rotated in the CW direction while the electromagnet 40 is energized in the state shown in FIG.
The sun gear 30 rotates in the CW direction. The first gear arm contacts the positioning member 33b, and the first planetary gear 31
By rotating in the CW direction, the gear 36 rotates in the CW direction, the gear 37 rotates in the CCW direction, and the second sun gear 38 rotates in the CW direction.
The second gear arm 45 rotates in the CW direction. The second planetary gear 47 is separated from the set gear 48 and the second gear arm 4
5 comes into contact with the positioning member 43, and the second planetary gear 47 meshes with the gear 49 (FIG. 9B). The amount by which the second planetary gear 47 switches from the set gear 48 to the gear 49 is set by the rotation amount of the motor 20, and after the motor 20 is rotated by the set amount, the energization of the electromagnet 40 is stopped (FIG. FIG. 7 (B) state.

The rewinding operation of the film is shown in FIGS.
In (B), when the motor 20 is rotated in the CW direction,
The first sun gear 30 rotates in the CW direction, the first gear arm 32 rotates in the CW direction, and the projection 32c is
3b. The first planetary gear 31 rotates in the CCW direction, the gear 36 is in the CW direction, the gear 37 is in the CCW direction,
The sun gear 38 rotates in the CW direction. The second gear arm 45 rotates in the CW direction and contacts the positioning member 43. The second planetary gear 47 rotates in the CCW direction, so that the gear 49 is in the CW direction, and the step gears 50 and 50 'are in the CCW direction.
The rewind gear 51, which rotates in the W direction and is provided with a claw for rewinding the film, rotates in the CW direction to rewind the film.

When the operation of switching to the set operation after the rewinding operation of the film is performed, FIGS.
In (B), the motor 20 is rotated in the CCW direction.
The first sun gear 30 rotates in the CCW direction, the first gear arm 32 rotates in the CCW direction, and the projection 32b of the first gear arm 32 abuts on the locking portion 35a of the first stopper 35. The first planetary gear 31 rotates in the CW direction, the gear 36 moves in the CCW direction, the gear 37 moves in the CW direction, and the second sun gear 3 rotates.
8 rotates in the CCW direction.

Since the friction torque of the second planetary gear 47 is set to be larger than the torque acting on the second gear arm 45 by the torsion spring 42, the second gear arm 45 is rotated with the rotation of the second sun gear 38 in the CCW direction.
Rotates in the CCW direction.

When the second gear arm 45 turns in the CCW direction, the locking arm 41d of the second stopper 41 comes off the projection 45b of the second gear arm 45, and the second stopper 41 is moved by the force of the torsion spring 42. Third in the CCW direction
The stopper 72 rotates in the CW direction. Also, at this time, since the light blocking portion 41b of the second stopper 41 escapes from the stopper PI46, the signal of the PI46 is turned on from off. The rotation of the motor 20 is stopped by detecting this signal (FIG. 1, FIG. 5B).

FIG. 12 is a block diagram of a control device for a drive mechanism according to the present embodiment. The configuration will be described with reference to FIG. Switching request means 73 constituting this control device
Receives a signal from an external switch (zoom button, power switch, rewind switch) or film end detection or rewind end from the camera body, and receives a target position for switching the gear drive system of the camera driving device, for example, A signal indicating a set-down position, a zoom-up / zoom-down position, a film winding position, and a film rewind position is output.

The gear arm position storage means 74 stores the current positions of the first, second, and third gear arms of the camera driving device. For example, the contents are retained even if the camera is powered off. ing. The storage means is E
EPROM is used.

The gear arm position comparing means 75 compares the switching position of the camera driving device from the switching request means 1 with the current arm position of the camera driving device stored in the gear arm position storing means 74, and It is determined whether or not to switch the gear drive system of the drive device.
When switching is performed, a drive command signal is output to the control means 76. When an arm switching end signal is received from the control means 4, the position of the camera driving device whose switching has been completed is checked, and the position information is written into the gear arm position storage means 74.

The control means 76 is constituted by a CPU, receives a drive command signal from the gear arm position comparison means 75, and switches the camera driving device to a designated switching position. 20 and the electromagnet 40 (see FIG. 1 and the like) and
The switching of 1 to 83 is controlled. Motor driving means 77
Is for driving the motor 20, and the driving direction of the motor 20 is changed to the CW direction and the CCW direction depending on the direction of the current.
Switch to the direction. The electromagnet driving means 79 drives the electromagnet 40 when it is desired to switch the gear position by pulling up the first stopper 35.

The first arm position detecting means 81 is provided with the first arm
When the gear arm 32 is on the zoom / winding side,
Whether the planet 31 is in a position meshed with the gear 36 (FIG. 5)
(See FIG. 6A) or the set / rewind side, that is, whether the first planetary gear 31 is in a position where it meshes with the third sun gear 60 (see FIG. 6A).
5A, and corresponds to the clutch PI34 in FIG. 5A. When the first gear arm 32 is located on the zoom / wind-up side, the clutch PI
When the clutch 34 is off (shielded) and is located on the set / rewind side, the clutch PI 34 is turned on (transmits light).

The motor driving amount detecting means 82 is a motor
It outputs a pulse corresponding to a drive amount of 0, is a PI directly connected to the motor, and is referred to as a motor PI.

The stopper position detecting means 83 is provided with
This is for detecting the position of the third stopper, and corresponds to the stopper PI46 in FIG. This stopper PI4
Reference numeral 6 denotes a switch which is turned off when any of the first to third stoppers is pulled up, and turned on when all the stoppers are lowered.

Each of the detection means 81 to 83 employs a PI (photo interrupter) in the embodiment.
Any type of sensor may be used as long as it can detect the movement position of the member, such as R (photo reflector) or another detection switch.

The position detection signal selecting means 84 includes first to third
With the control for switching the gear arm, the control means 76
From the first arm position detecting means 81,
Alternatively, the output signal of the motor drive amount detection means 82 or the stopper position detection means 83 is fetched. The signal processing unit 85 processes the output of each of the detection units 81 to 83, and feeds back the current drive information of the gear arm or the state of the stopper to the control unit 76.

Referring to the operation state diagram of the camera driving mechanism shown in FIG.
A description will be given with reference to flowcharts of switching control of Nos. To 19. The function of each output gear of the driving device is as shown in FIG.
When the rewind gear 51 of (A) rotates in the CW direction, the film is rewound into the cartridge. Also, set gear 4
When the lens 8 rotates in the CW direction, the mirror frame performs the set-up operation.
When rotated in the CW direction, the lens frame performs a set-down operation.
When the zoom gear 65 rotates in the CCW direction, the lens frame performs a zoom-down operation, and when the zoom gear rotates in the CW direction, the lens frame performs a zoom-down operation. Furthermore, when the wind gear 70 is CCW
When rotated in the direction, the film is wound up.

In the power-off state of the camera, the first gear arm 32 is on the set / rewind side, that is, the position where the planetary gear 31 is engaged with the gear 36, and the second gear arm 45 is connected to the planetary gear 47. The third gear arm 61 is located at a position where the set gear 48 meshes with the set gear 48.
2 and the zoom gear 65 are in a meshing position, and the information is stored in the gear arm position detecting means 74.

FIG. 13 is a flowchart of a photographing sequence including drive control after the power of the camera is turned on. This flow is processed assuming that a film is already loaded in the camera. When the power switch of is turned on, in the initial setting step S86, C
It performs initialization of the control means 76 which is a PU, checks the power supply voltage, calls EEPROM data, and the like.

Then, in order to move the lens barrel from the retracted position to the photographing position, in step S87, the state is switched to a meshing state in which the set gear 48 can be driven (see FIG. 5A, the switching control will be described later). However, planetary gear 4
Since 7 is engaged with the set gear 48, no operation is performed again. In the setup operation (Step S88) to be executed subsequently, the motor PI, that is, the motor drive amount detecting means 82 is selected, and the motor 20 is driven in the CW direction by a predetermined number of pulses.

After the end of the setup control, step S89
A zoom gear switching process for switching the gear drive system to a meshing state in which the zoom gear 65 capable of zooming up / down can be driven is performed. This process is a process of switching the first gear arm 32 from the set / rewind side to the zoom / wind side (see FIG. 6A). Then, the lens frame is driven to a wide position, and a photographing state is set (step S90).

Subsequently, various processes are performed according to the switch input of the camera. When the release switch is first pressed and an ON signal of the release switch is detected, the processes in steps S92 to S95 are performed. . That is,
When the release switch is turned on, the distance to the subject is measured. An AF lens (focus lens) is extended by a shutter operation (step S93) based on the data measured by the shutter operation to expose the film.
After the exposure, the film is switched from a meshing state in which the zoom gear 65 capable of zooming up / down in order to wind up the film can be driven to a meshing state in which the film winding wind gear 70 is meshed (step S94). This processing is performed by the third gear arm 6
1 is a process of switching from the zoom side to the winding side (see FIG. 7A).

After the switching, the film moving amount is detected by using a film moving amount detecting photo reflector (hereinafter referred to as WPR, not shown), and the film is wound up by one frame. At this time, the motor 20 is driven in the CCW direction.

If the release switch is not operated and the zoom up / down switch is operated, the process proceeds to steps S97 to S98 by the judgment processing of step S96. At this time, the gear drive system of the camera driving device is in a meshing state in which the wind gear 70 can be driven (see FIG. 7A), but when the zoom switch is operated, the gear drive system meshes with the wind gear 70. Zoom gear 6 from the state
The state is switched to the meshing state in which five driving can be performed (step S9)
7). In this case, the third gear arm 61 is moved from the winding side to the zoom side, that is, the planetary gear 62 is
(See FIG. 6B). When the zoom-up switch is pressed, the motor 20 is switched to CCW.
Drive in the direction. When the zoom down switch is pressed, the motor 20 is driven in the CW direction. Then, the driving of the motor is continued until the zoom switch is turned off or the tele / wide position is reached.

If the power switch is not turned off, the film end is not detected, or the forced rewind switch is not turned on in step S99,
Returning to step S91, the above processing is repeated. on the other hand,
Power switch off detection, film end detection,
Alternatively, when the ON of the forced rewind switch is detected, the process proceeds to steps S100 to S103 to execute a process of retracting the lens frame.

First, the gear drive system of the camera driving device is switched to the meshing state of the zoom gear 65 capable of zooming up / down (step S100). Depending on the state of the gear at the time of the determination in step S99, the zoom gear 6
No operation is performed when 5 is engaged. Subsequently, the motor 20 is turned CW until the lens barrel can be collapsed.
In the direction to zoom down (step S10).
1).

Upon completion of the zoom-down processing, the gear drive system is switched from the meshing state of the zoom gear 65 to the meshing state of the set gear 48 in order to retract the lens frame (step S10).
2). In this case, the first gear arm 32 is switched from the wind / zoom side to the set / rewind side, that is, the planet gear 31 is engaged with the gear 36 (the state shown in FIG. 5A). Then, the motor 20 is driven in the CW direction to retract the lens frame (step S103).

When a film rewind request is detected while the film is being wound or the forced rewind switch is pressed, the gear drive system is moved from the meshed state of the set gear 48 to the rewind gear 51 to rewind the film. Switch to a drivable state (step S10)
5). This processing operation rotates the second gear arm 45,
The planetary gear 47 is a rewinding gear 4 from the set gear 48.
This is a switching operation for meshing with No. 9 (FIG. 7B).

When it is detected that the planetary gear 47 has meshed with the rewinding gear 49, the WPR is detected, and the motor 20 is driven in the CW direction until the output of the WPR disappears, thereby winding the film. Return (Step S
106). When the rewinding of the film is completed, the second gear arm 45 is switched so that the planetary gear 47 separates from the gear 49 of the rewinding gear system and meshes with the set gear 48 so that the gear drive system is in a meshing state with the set gear 48 (step S107). , FIG. 5 (A)), and terminates this routine. If it is determined in step S104 that there is no request to rewind the film, the routine ends with the lens retracted.

Next, detailed control of each switching process called in the photographing sequence including the drive control of FIG. 13 will be described. FIG. 14 is a flowchart showing the flow of the gear change control. As described in FIG. 13, when the current camera state or switch input instructs switching to a state in which each output gear can be driven, such as set gear switching, rewind gear switching, zoom gear switching, and wind gear switching, FIG. Are called, and the drive target position of each gear arm is set (step S110).

When it is desired to switch to the meshing state in which the set gear 48 can be driven, the target position of each gear arm is set to the set / rewind side with respect to the first gear arm 32, that is, the position rotated to the gear 36 meshing position. Is set to the target position. Further, with respect to the second gear arm 45, a position rotated to the meshing position of the set gear 48, the third gear arm 61
, The position rotated to the meshing position of the zoom gear 65 is set as the target position.

When it is desired to switch to the rewind gear 51 drivable state, first, the set / rewind side with respect to the first gear arm 32, that is, the position rotated to the meshing position of the gear 36, is further moved to the second gear arm 45. On the other hand, the position rotated to the meshing position of the gear 49 of the rewinding system and the state rotated to the meshing position of the zoom gear 65 with respect to the third gear arm 61 are set to the respective target positions.

When it is desired to switch to the meshing state in which the zoom gear 65 can be driven, the first gear arm 32 is moved to the zooming / winding side, that is, the position rotated to the meshing position of the third sun gear 60, and further the second gear arm 32 is rotated. The position rotated to the meshing position of the set gear 48 is set as the target position with respect to the position 45, and the position rotated to the meshing position of the zoom gear 65 is set as the target position with respect to the third gear arm 61.

When it is desired to switch to the meshing state in which the wind gear 70 can be driven, the first gear arm 32 is moved to the zooming / winding side, that is, the position rotated to the meshing position of the third sun gear 60, and further the second gear arm 32 is rotated. The position rotated to the meshing position of the set gear 48 is set as the target position with respect to the position 45, and the position rotated to the meshing position of the wind gear 70 with respect to the third gear arm 61 is set as the target position.

However, when it is desired to switch to the meshing state of the set gear 48, if the gear train is currently meshing with the wind gear 70, the gear train is first switched to the meshing state of the zoom gear 65 (steps S108, 109).

Next, after the above-described target setting processing in step S110, it is determined whether the current arm position stored in the EEPROM is equal to the actual position detected by the two position detecting means of the stopper PI46 and the clutch PI34. Compare (step S111).

That is, when the state currently stored in the EEPROM data is switched to the set gear 48 side, the state of the clutch PI34 is ON and the stopper PI4
State 6 must be on. When switching to the rewind gear 51 side, the state of the clutch PI34 must be on and the state of the stopper PI46 must be off. In the case of switching to the zoom gear 65 side, the state of the clutch PI34 is off and the stopper PI46
Must be turned on. In the case of switching to the wind gear 70 side, the state of the clutch PI34 must be off and the state of the stopper PI46 must be on.

If the correspondence between the arm position information and the state of each PI as described above is not correct, the gear meshing state is initialized, the set gear 48 is meshed, and the lens barrel is retracted (step S112). . If the lens frame is in a photographable state before the gear initialization described later is performed, the lens frame is driven to the wide position (step S114).
In step S115, initialization is performed. This is processing for initializing RAM data used for control and setting interrupts and the like.

First arm 32 in step S116
In the switching process, when the gear drive system is to be switched to the set gear 48 or the rewind gear 51, the first gear arm 32 is switched from the zoom / winding side to the set / winding side meshing state. When it is desired to switch the gear drive system to the zoom gear 65 or the wind gear 70, control is performed to switch the first gear arm 32 from the set / rewind side to the zoom / wind-up side meshing position. After the switching of the first gear arm 32 is completed, the rotation of the second gear arm 45 or the third gear arm 61 is controlled to a position where it meshes with the respective target gear.

The target position of the first gear arm 32 is set /
In the case of the switching position to the rewinding side (in FIG. 14, it is described as S / R side), it is determined whether it is desired to switch to the set gear 48 side or to the rewind gear 51 side (step S118). When switching to the set gear 48 side, the second gear arm 45 is controlled to rotate to the set gear 48 meshing position (step S119), and when switching to the rewind gear 51 side, the second gear arm 45 is rotated to the gear 49 meshing position. It is controlled to move (step S120).

When the target position of the first gear arm 32 is
In the case of the switching position to the winding side, the third arm 61 is controlled to rotate to the meshing position of the zoom gear 65 or the wind gear 70 according to the target position information (steps S121 to S123). The gear switching control is completed by the processing described above.

During the switching control of the second gear arm 45 or the third gear arm 61, if the first gear arm 32 moves due to an impact on the camera, it may cause a malfunction after the gear is switched. The state is detected, and the rewritten position of the first gear arm 32 and the state of the PI are checked (steps S124 and S125).

If the position of the PI 34 is different from the position of the first gear arm 32, the process jumps to damage as an error process (step S126). Finally, the state of the gear train switched is written into the EEPROM, and this routine ends (steps S127 to S128).

FIG. 15 is a flowchart showing step S116 of FIG.
1st gear arm 32 which is a subroutine called by
5 is a flowchart of switching control of the first embodiment. In this routine, when it is desired to switch the first gear arm 32 to the S / R side, that is, to the set / rewind side, when the first gear arm 32 is already located on the S / R side, To switch to the W / Z side, that is, to the wind / zoom side,
When the first gear arm 32 is located on the side, there is no need to switch the first gear arm 32, and thus this routine ends as it is (steps S129 to S131).

In any state other than the above-mentioned state, it is necessary to rotate the first gear arm 32. However, as described above, the first gear arm 32 is locked by the first stopper 35.
To rotate it, the electromagnet 40 is turned on and the first
It is necessary to raise the stopper 35.

In step S132, a loose driving operation is performed to raise the first stopper 35. The loosening operation first detects whether the state of the stopper PI46 is turned off by applying a full voltage to the electromagnet 40 for a predetermined time. When it is detected that the stopper PI 46 has been turned off, there is no need to apply a full voltage thereafter.

Then, even if a predetermined time has passed, the stopper P
If the off state of I46 cannot be detected, if the current position of the first gear arm 32 is on the set / rewind side, the first stopper 35 and the first gear arm 32 or the second gear arm 32
Either the stopper 41 or the second gear arm 45 bites. When the position of the first gear arm 32 is currently on the zoom / wind-up side, the first stopper 35 and the first gear arm 32 or the third stopper 7
Either the second gear arm 61 or the third gear arm 61 bites.

In order to release the biting, first, the motor PI is driven by a predetermined number of pulses in a direction in which the biting of the second gear arm 45 or the third gear arm 61 can be released.
Since this driving direction is the same as the direction in which the first gear arm 32 bites, the first gear arm 32 is driven by the number of pulses of the motor PI that releases the biting of the first gear arm 32.

The number of biting release pulses must be determined within a range where the relationship of the pulse of the second gear arm 45 or the third gear arm 61> the number of biting release pulses of the first gear arm 32 is satisfied. After the predetermined pulse drive, the electromagnet 40 is turned on again at the full voltage, and the third stopper 72 is pulled up. When the stopper is pulled up, the state of the stopper PI46 is turned off. Therefore, after detecting the off state, the drive voltage of the electromagnet 40 is switched to the minimum holding voltage. In this state, the first stopper 35 is surely pulled up, and the first gear arm 32 can rotate (see FIG. 8A or FIG. 8B).

In step S133, a guard timer for the detection time of the clutch PI34 is set, the clutch PI34 is selected as the position detecting means of the first gear arm 32, and the setting is made so as to detect the on / off state (step S133).
134). In step S135, when the first gear arm 32 is switched from the set / rewind side to the zoom / rewind side, the motor 20 is switched in the CCW direction, and the first gear arm 32 is switched from the zoom / rewind side to the set / rewind side. In this case, the motor 20 is driven in the CW direction by a duty drive that repeats on and off at intervals of a predetermined cycle until the state of the clutch PI34 changes.

If no change in the clutch PI34 is detected even after the lapse of the predetermined time, it is determined that an error has occurred, and the process jumps to the damage process (step S136). When a change in the clutch PI34 is detected, the electromagnet 40 is turned off,
The drive voltage of the motor 20 is set to a predetermined value (step S
138, 139). Even if the electromagnet 20 is turned off as shown in FIG. 11 (B), the first stopper 35 rides on the first gear arm 32, and the stopper PI
46 remains off (light-shielded).

Therefore, the selection PI of the position detecting means is switched from the clutch PI34 to the stopper PI46. Then, a guard timer for the detection time of the stopper PI46 is set, and the motor 20 starts to be driven in the same direction as above (steps S140 to S142).

When the fall of the stopper PI46 is detected (step S144), the motor 2 is switched upon completion of the gear change.
The brake is applied to 0 (step S145). If it is determined that the fall of the stopper PI46 cannot be detected within the predetermined time, the process jumps to the damage process as a gear switching error (step S143). After confirming that the motor has stopped, the information of the first gear arm 32 is updated to the state where the switching has been completed, and this routine is ended (step S
146).

FIG. 16 shows a state where the second gear arm called at step S119 in FIG. 14 is switched from the rewind position to the set position (from the state shown in FIG. 10B to the state shown in FIG. 5A).
(Switching to the state of (1)). First, in step S147, when the second gear arm 45 is switched to the set gear meshing state, it is determined whether or not the second gear arm 45 is already at the meshing position of the set gear 48. (State of FIG. 5A).

When the second gear arm 45 is located at the meshing position of the gear 49 in a state in which the rewind can be driven, the stopper PI46 is shielded from light and is in the off state, and the process proceeds to step S149, where the stopper PI4 is used as the position detecting means.
6 is selected (step S148).

Next, a guard timer for the switching time is set (step S149). Then, the motor 20 is set to a predetermined constant voltage, and the motor 20 is driven in the CCW direction (step S150). Thereby, the second gear arm 4
5 drives in the CCW direction.

If the fall of the stopper PI 46 is detected within a predetermined time, that is, if a detection signal from OFF to ON is not obtained, it is determined that switching has failed, and a retry is performed.
If the switching fails the second time, the process jumps to the damage process (steps S151 to S153).

When the fall of the stopper PI46 is detected (from off to on), the motor 20 is braked and stopped (step S155). Finally, the position information of the second gear arm 45 is updated, and this routine ends (step S156).

FIG. 17 shows the control for switching the second gear arm 45 called from step S120 in FIG. 14 from the set position to the rewind position (from FIG. 5A to FIG. 10).
(Switching to (A)).

First, when the position of the second gear arm 45 is switched to a position where the rewind gear can be driven, if the second gear arm 45 is already in a state where the rewind gear can be driven, this routine is terminated without any operation (step S1).
57).

When the second gear arm 45 is switched to the rewind drive-enabled state, the electromagnet 40 is turned on to release the locked state of the second gear arm 45 because the second gear arm 45 is locked by the second stopper 41. There is a need to. For this reason, in step S158, the loosening drive is performed, the electromagnet 40 is turned on, and the stopper PI46 is turned off.

In the above loosening operation, the electromagnet 40 is once turned on at the full voltage. When the first to third stoppers are pulled up, the state of the stopper PI46 is switched from on to off by the light blocking portion of the second stopper entering the stopper PI46. When the off detection of the stopper PI46 is performed,
The voltage applied to the electromagnet 40 is switched to the specified holding voltage, and the loosening operation ends.

If the off detection of the stopper PI46 is not obtained, either the second gear arm 45 and the second stopper 41, or the first gear arm 32 and the first stopper 35 are stuck. In order to release this biting, the motor PI is driven in the CCW direction by a predetermined number of pulses by the motor PI, then driven in the CW direction, the electromagnet 40 is energized again, and the state of the stopper PI46 is detected (step S1).
58). After detecting that the stopper PI 46 has been turned off, the motor PI is selected as the position detecting means, and the driving amount of the motor is detected (step S159).

Next, a limiter is set to a time until the end of switching to the rewind gear (step S160). Then, while the electromagnet 40 is kept on, the motor 20 is turned on and off for a predetermined period in the CW direction (step S161).

When the output of the motor PI is detected for a predetermined time or the number of switching pulses, the energization of the electromagnet 40 is turned off, and the motor 20 is stopped by the motor brake (steps S162 to S164).

After the motor 20 is stopped, it is confirmed that the state of the stopper PI 46 is off (light-shielded), the position information of the second gear arm 45 is updated, and this routine ends. When the stopper PI46 is on, it is considered that the stopper has fallen during the gear change. Therefore, the switching operation is retried again. However, if the second failure also occurs, it is determined that there is damage (step S1).
68).

FIG. 18 is a flowchart of control (switching from FIG. 7A to FIG. 6A) for switching the third gear arm from the wind position to the zoom position, which is called in step S122 of FIG. Third gear arm 61
Is switched to the zoom gear meshing state, if the third gear arm 61 is already located at the zoom gear meshing position, this routine is immediately terminated (step S17).
0).

In step S171, the stopper PI46 is selected as a position detecting means for switching control. A motor drive voltage for driving the third gear arm 61 is set (step S172). Third gear arm 6
1 sets a time limiter until the end of switching from the wind position to the zoom position. If the switching is not completed within this time, it is determined that there is damage (steps S173, S17).
5).

At the set driving voltage, the motor 20
It is driven in the W direction (step S174). The third
When the gear arm 61 is at the wind gear meshing position, the stopper PI46 is on. By driving the motor 20 in the CW direction, the third gear arm 61
Lift the stopper 72. When the third gear arm 61 rotates to a predetermined position, the rising detection of the stopper PI46 is obtained. That is, the output of the stopper PI46 changes from ON (light transmission) to OFF (light shielding). The change is detected in step S176.

After the off detection of the stopper PI46, the motor 20 is further driven in the CW direction. Third gear arm 61
When reaches the position of the zoom gear, the stopper drops and the fall detection of the stopper PI46 (change from off to on) is obtained (steps S177 to S179). This stopper P
When the fall of I46 is detected, the motor 20 is braked and stopped (step S180). Finally, the position information of the third gear arm 61 is updated and the process ends (step S181).

FIG. 19 shows control for switching the third gear arm 61 called from step S123 in FIG. 14 from the zoom position to the wind position (FIGS. 6A to 7A).
2 is a flow chart of the switching to the operation shown in FIG. When switching the third gear arm 61 to the wind gear meshing position, if the third gear arm 61 is already at the wind gear meshing position, the present routine ends as it is (step S18).
2).

The third gear arm 61 has a third stopper 72
Thus, even if the motor 20 is driven in the CCW direction, the motor 20 is locked so as not to switch to the wind gear meshing position. Therefore, when switching the third gear arm 61 from the zoom position to the wind position, it is necessary to release the locking of the third gear arm 61 by turning on the electromagnet 40.

In step S183, the electromagnet 40 is turned on by the loosening drive, and the off detection of the stopper PI46 by releasing the stopper is performed.

In the loose driving, the electromagnet 40 is once turned on at a full voltage. When the first to third stoppers are lifted, the light blocking portion of the second stopper 41b is moved to the stopper PI46.
, The state of the stopper PI46 is switched from on to off. When the off detection of the stopper PI46 is performed, the voltage applied to the electromagnet 40 is switched to the specified holding voltage, and the process ends.

When the off detection of the stopper PI46 is not obtained, either the third gear arm 61 and the third stopper 72 or the first gear arm 32 and the first stopper 35 are in a biting state. In order to release this biting, the motor PI outputs a predetermined number of pulses with the output of the motor PI.
Are driven in the CCW direction after driving in the CW direction. The electromagnet 40 is energized again to detect the state of the stopper PI46. After the off detection of the stopper PI46, the motor PI is selected as the position detecting means, and the driving amount of the motor is detected (step S184).

Next, a time limiter is set until the third gear arm 61 switches from the zoom position to the wind position (step S185). With the electromagnet 40 energized, the motor 20 is driven in the CCW direction with a predetermined cycle motor on / off duty (step S18).
6). If the switching end pulse is not output within the predetermined time, the process jumps to the damage process as a gear switching failure (step S187).

When the number of pulses required for gear switching set in advance is detected, the electromagnet 40 is turned off (steps S188 to S189). After the electromagnet 40 is turned off, in order to detect the state of the stopper, the position detecting means is driven by the motor P.
Switching from I to the stopper PI46 (Step S19)
0).

When the third gear arm 61 is switched to the zoom position, the first to third stoppers are dropped, and the output of the stopper PI 46 is turned on from off to on when the duty drive of turning on and off the motor 20 is continued (steps S191 to S193). Switch to. The detection signal is read, and the motor 20 is braked and stopped (step S194). Finally, the position information of the third gear 61 is updated, and this routine ends (step S195).

As described above, according to the camera driving mechanism of the present embodiment, the single motor 20 is used as a driving source, and the setting and resetting of the lens frame are performed by turning on / off one electromagnet 40 and the rotation direction of the motor 20. And a mechanism that allows a plurality of drive systems of zoom up and zoom down, wind and rewind to be selected and driven,
It is possible to provide a camera driving mechanism that consumes less power, occupies less space, and is cost-effective.

In the camera driving mechanism of the above-described embodiment, the driving loads are set to wind up and rewind the film, to extend the lens frame to the photographing position, and to retract the lens frame and zoom up and zoom down the lens frame. Without limitation, for example, shutter drive, shutter charge,
It is also suitable for opening and closing a barrier, extending and retracting an autofocus lens, moving a strobe, switching a panorama shooting screen, and moving a mirror of a single-lens reflex camera.

(Appendix) According to the embodiment of the present invention as described in detail above, the following configuration can be obtained. That is, (1) a sun gear, a planetary gear that always meshes with the sun gear, a connection arm that connects between the rotation axes of the planetary gear and the sun gear, and a rotation of the connection arm around the sun gear. A camera comprising: a plurality of sets of stopper members that are displaced between a state in which movement is prohibited and a state in which movement is released, wherein the plurality of stopper members are driven by a single electromagnetic means.

(2) A single motor, a sun gear rotated forward and reverse by the motor, a first planetary gear always meshing with the sun gear, and a rotating shaft between the sun gear and the planetary gear. , A first and a second driven gear selectively meshed with and driven by the planetary gear by the revolution of the planetary gear, and a first and a second driven gear, respectively. , The second and third planetary gears that always mesh with the first driven gear and the second planetary gear, and the second and third planetary gears that connect between the second driven gear and the rotation shaft of the third planetary gear. 3 in the second and third connecting arms,
A plurality of stopper members which are displaced between a state in which rotation around the first and second driven gears is prohibited and a state in which the rotation is released, and the second and third planetary gears revolve to rotate the second and third planetary gears. By determining the positions of the plurality of driven members, the plurality of connecting arms, and the stopper members that are selectively meshed with and driven by the planetary gears, selection of the driving force to be connected to the plurality of driven members. And a control means for controlling the camera.

(3) A single motor, a sun gear rotated forward and backward by the motor, a planetary gear that always meshes with the sun gear, and a connection that connects between the rotation shafts of the sun gear and the planetary gear. An arm, and a plurality of driven gears selectively driven by being engaged with the planetary gear by the revolution of the planetary gear;
A plurality of planetary gears that always mesh with each of the plurality of driven gears, a plurality of connecting arms that link between the plurality of driven gears and the rotating shafts of the respective planetary gears that mesh with the plurality of driven gears, and the plurality of planetary gears; When one of the planetary gears revolves in one orbital direction, the rewinding drive mechanism for performing the film rewinding operation, which is driven by meshing with the revolving direction, and the other one of the plurality of planetary gears are provided. A camera, comprising: a winding drive mechanism for performing a film winding operation, which is driven by meshing with the revolving direction in the other revolving direction.

(4) A sun gear, a planetary gear that always meshes with the sun gear, a connecting arm that connects between the rotating shafts of the planetary gear and the sun gear, and a rotation of the connecting arm around the sun gear. A stopper member that is displaced between a state in which movement is prohibited and a state in which the movement is released, and a single electromagnetic unit that performs an operation of inhibiting the one-way rotation of the connecting arm of the plurality of stopper members, The camera according to claim 1, wherein the operation of prohibiting the rotation of the connecting arm in the other direction is performed by the connecting arm getting over a stopper member.

[0148]

As described above, the camera of the present invention does not need to use a complicated switching mechanism, can transmit power to a plurality of driven parts using a single electromagnetic means, and consumes less power. It is possible to provide a camera which is small, occupies a small space, and is cost-effective.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing a configuration of a driving device incorporated in a camera showing one embodiment of the present invention, and one driving state of the device.

FIG. 2 is an enlarged perspective view showing one driving state of the camera driving device of FIG. 1;

FIG. 3 is an enlarged perspective view showing another driving state of the camera driving device of FIG. 1;

FIG. 4 is an enlarged perspective view showing another driving state of the camera driving device of FIG. 1;

FIGS. 5A and 5B are diagrams showing an operation state of the camera driving device of FIG. 1, wherein FIGS.

FIGS. 6A and 6B are views showing an operation state of the camera driving device of FIG. 1, wherein FIGS.

FIGS. 7A and 7B are diagrams showing an operation state of the camera driving device shown in FIG. 1, wherein FIGS.

FIGS. 8A and 8B are diagrams showing an operation state of the camera driving device of FIG. 1, wherein FIGS.

FIGS. 9A and 9B are views showing an operation state of the camera driving device of FIG. 1, wherein FIGS.

FIGS. 10A and 10B are diagrams showing an operation state of the camera driving device of FIG. 1; FIGS.

FIGS. 11A and 11B are diagrams showing an operation state of the camera driving device of FIG. 1, wherein FIGS.

FIG. 12 is a block diagram of a control device of the camera driving device of FIG. 1;

FIG. 13 is a flowchart of a shooting sequence including drive control of the camera in FIG. 1 after the camera is turned on.

FIG. 14 is a flowchart of each of the switching gears called in the photographing sequence including the drive control of FIG.

FIG. 15 is a flowchart of a first gear arm switching process called in the routine of FIG. 14;

FIG. 16 is a flowchart of a second gear arm switching process called in the routine of FIG. 14;

FIG. 17 is a flowchart of a second gear arm switching process called in the routine of FIG. 14;

FIG. 18 is a flowchart of a third gear arm switching process called in the routine of FIG. 14;

FIG. 19 is a flowchart of a third gear arm switching process called by the routine of FIG. 14;

[Explanation of symbols]

30, 38, 60 ... Sun gear 31, 47, 62 ... planetary gear 32, 45, 61 ... Arm (connection arm) 35, 41, 72 ... Stopper (stopper member) 40 ...... Electromagnet (electromagnetic means)

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-34778 (JP, A) JP-A-6-148727 (JP, A) JP-A-7-104361 (JP, A) 273835 (JP, A) JP-A-62-129829 (JP, A) JP-A-61-172127 (JP, A) Japanese Utility Model Laid-Open No. 61-207006 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) G03B 17/00

Claims (2)

(57) [Claims] 1. A a single motor, a first sun gear which is normally and reversely rotated by the motor, a first planetary gear always meshes with the first sun gear, and the first sun gear A first connecting arm for connecting between the rotation shafts of the first planetary gear and the first sun gear when the first sun gear is rotated in one direction;
The first planetary gear is revolved and displaced.
The second thick plate capable of transmitting the driving force from the
The sun gear and the first sun gear are rotated when the first sun gear is rotated in the other direction.
The first planetary gear is revolved and displaced.
A third thick plate capable of transmitting the driving force from the
A positive gear, a second planetary gear that always meshes with the second sun gear, and a rotating shaft between the second sun gear and the second planetary gear.
, A third planetary gear that always meshes with the third sun gear, and a rotating shaft between the third sun gear and the third planetary gear.
A third connecting arm for connecting, by engaging the first to third connection arm of the first
A state where the revolution of each of the third to third planetary gears is prohibited and allowed.
A plurality of stopper members that can be displaced between the plurality of stopper members and a state where the plurality of stopper members are prohibited.
A single electromagnetic means capable of being displaced into a state, a connecting arm of the plurality of connecting arms, and the plurality of switches.
Determine the position of one stopper member of the topper member
Control means for switching the transmission destination of the driving force of the motor
Camera, characterized in that the, the equipped. Wherein a single motor, a first sun gear which is normally and reversely rotated by the motor, a first planetary gear always meshes with the first sun gear, and the first sun gear A first connecting arm that connects between the rotation shafts of the first planetary gear and the first sun gear when the first sun gear is rotated in one direction;
By the planetary gear is displaced by revolution, a second thick that it is possible to drive force from the first planetary gear is transmitted
When the first sun gear is rotated in the other direction, the first sun gear
By the planetary gear is displaced by revolution, the third thickness that it is possible to drive force from the first planetary gear is transmitted
And yang gear, a second planetary gear always meshes with the second sun gear, a second connection arm for connecting the rotary shaft between the second sun gear and the second planetary gears, the a third planetary gear always meshes with the third sun gear, a third connection arm for connecting the rotation axis between the third sun gear and the third planetary gears, said first connection arm The first link so as to be able to lock the revolving rotation of the first link.
The position of the arm in the rotation locus and the revolution of the first connecting arm
A position outside the rotation trajectory of the first connecting arm so as to allow movement.
A first stopper member which can be freely displaced, and the second link which can lock the revolving rotation of the second connecting arm.
The position in the turning locus of the arm and the revolution of the second connecting arm
A position outside the rotation trajectory of the second connecting arm so as to allow movement.
And a third stopper member that is displaceable to the third connection arm and the third connection member that can lock the revolving rotation of the third connection arm.
The position of the arm in the rotation locus and the revolution of the third connecting arm
A position outside the rotation trajectory of the third connecting arm so as to allow movement.
And a third stopper member which can be freely displaced, and the second stopper member and the third stopper member.
Inside or outside the rotation locus of the first and second connecting arms
Biasing means for biasing the first stopper member toward one of the first position and the rotation locus of the first connecting arm.
And a single electromagnetic means for driving and displacing to a position outside the rotation locus and a position outside the rotation locus, within the rotation locus of the first connecting arm of the first stopper member.
In conjunction with the drive displacement to the position
The member and the third stopper member are connected to the first and second stoppers.
Change to one position within or outside the rotation trajectory of the connecting arm
And the first connection of the first stopper member
In conjunction with the drive displacement to a position outside the rotation locus of the arm, the above
The second stopper member and the third stopper member are
Rotation trajectory of the first and second connecting arms against the urging means
A camera characterized by being displaced to the other position inside or outside the rotation locus .