JP2879754B2 - Power transmission device and 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 power transmission device for transmitting a driving force and an improvement of a camera .

[0002]

2. Description of the Related Art As shown in FIG. 19, a conventional general planetary gear mechanism has a sun gear 101 which rotates with a certain power, and a sun gear 10 which rotates about the same shaft 108 as the sun gear 101.
The arm 102 which rotates independently of 1 and its arm 10
And a planetary gear 103 which is attached to the arm 102 by a shaft 107, rotates against the arm 102 by rotation with a spring 106 or the like, and meshes with the sun gear 101.

[0003] As a result, the planetary gear 103 becomes the sun gear 1
The planetary gear 103 can rotate (revolve) on its own, and can rotate (revolve) on its own.

This planetary gear mechanism is generally used as a switching mechanism for transmitting power for winding and rewinding a film in a camera or the like. At this time, the planetary gear 10
As shown in FIG. 20, the orbital range of No. 3 does not revolve 360 degrees, but is restricted by two gears, for example, a gear 104 for transmitting power to the hoisting system and a gear 105 for transmitting power to the rewinding system. Is done. However, actually, there is a possibility that the gears may bite each other.
The revolution of the planetary gear 103 is regulated by abutting the shaft 107 of the number 03 on the abutting portions 109 and 110. Thus, if the sun gear 101 rotates left, the planetary gear 1
03 meshes with the gear 105 to rotate the gear 105 to the left as indicated by the solid arrow, and conversely, when the sun gear 101 rotates to the right, the gear 104 rotates to the right as indicated by the broken arrow. It includes various state thereby generated below.

[0005] 1) Which of the gears 104 and 105 should switch power is determined only by the left and right rotation of the sun gear 101.

2) Gears 104 and 105 to which power is transmitted
Has only one rotation direction. That is, there are two power systems.

[0007] 3) During power transmission or when there is no gear backlash and a tension is generated in the teeth or tooth surfaces in the transmission direction, the abutting portion 109 is driven by the shaft 107.
More force F-109. In the opposite case, the butting portion 110 receives the force F-110.

4) When the planetary gear 103 is switched to the gear 104 from the state where power is being transmitted to the gear 105 as in the state of FIG. 20, there is no backlash immediately after the right rotation of the sun gear 101 is started. Occurs on teeth and tooth surfaces
Until the tension is removed and the force F-109 is lost, the planetary gear 103 only rotates (left-rotates) and starts revolving later.

The reason why the two systems are used as the force as in the above 2) is as follows: a) The conventional planetary gear mechanism is a planetary gear 103 as shown in FIG.
Is restricted by the gears 104 and 105, the planetary gear 103 cannot mesh with any part other than the gears 104 and 105.

B) The direction of rotation of each gear 104, 105 is
One direction is the power transmission direction and the other direction is the switching direction of the planetary gear, so that one gear can transmit only one direction of force.

For the above reasons, the number of force transmissions is two.

On the other hand, a planetary gear mechanism as shown in FIG. In this mechanism, a plurality of gears 111a to 111d are arranged on the circumference (four in this example), and the sun gear 10 is arranged so as not to hinder the revolution of the planetary gear 103.
1, the same positional relationship as the planetary gear 103 and the same straight line. Each of the gears 111a to 111d has a planetary gear 1
Stoppers 112a-11 for preventing leftward revolution of 03
2d is arranged so as to be able to advance and retreat, whereby the gear 111 meshes with the planetary gear 103 when the sun gear 101 rotates clockwise.
a to 111d are selected, and the stoppers 112a to 112d and the shaft 107 abut by the left rotation of the sun gear 101,
The force is transmitted to each of the gears 111a to 111d. However, this only solves the above problem a), and the problem b) remains as it is. That is, the force transmission direction of the gears 111a to 111d is only one direction as shown in FIG. 21, and the force cannot be transmitted to the reverse rotation.

The gears 111a to 111d as shown in FIG.
Even if four gear trains are used and the preceding gear train is four, the transmitted force is only in one direction, so that there is a disadvantage that it is difficult to use it for a mechanism requiring both left and right rotations. In view of this disadvantage, it is possible to transmit the force in both the left and right directions to the transmission mechanism in only one direction by using a planetary gear mechanism as shown in FIG. In this figure, the planetary gear 103
Of the rotation of the stoppers 113a, 113b and 114a, 11
By stopping at 4b, both left and right rotations of the revolution can be stopped, and power can be transmitted to the gears 111a and 111b in both rotation directions.

[0014]

However, FIG.
As shown in FIG. 2, when the planetary gear 103 meshes with the gear 111a, the other gear 111b does not mesh with any gear, and there is nothing that restricts the rotation of this gear 111b. For this reason, there is a problem that the mechanism to which the power is transmitted to the gear 111b moves arbitrarily and malfunctions.

The present invention has been made in view of the above circumstances, and a power transmission device and a power transmission device capable of preventing malfunction with a simple configuration.
And cameras .

[0016]

Means for Solving the Problems In order to achieve the above object, the present invention according to claim 1 is directed to a first method for transmitting a driving force.
Of a rotating part, a second rotating part which revolves the first around the rotation portion of the rotation and the first in conjunction with the rotation of the rotating part, before
The engaged by serial second rotating portion revolves first
A power transmission system for driving force from the rotating part is transmitted, and regulating means for regulating the operation of the <br/> power transmission system, when the second rotating portion is moved to the first revolving position Said regulation means
In combination, the regulating means is disengaged by the revolving force of the second rotating part.
In the working state, the second rotating part is driven by the first rotating part.
In conjunction with the movement from the revolution position to the second revolution position
A power transmission device having an operating means for setting the restricting means in an operative state . The book according to claim 10
The invention comprises a first rotating part for transmitting a driving force;
The rotation and the rotation of the first rotating part in conjunction with the rotation of the rotating part
A second rotating unit that revolves, and the second rotating unit revolves
The driving force from the first rotating portion
Regulated power transmission system and operation of the power transmission system
And the second rotating part moves to the first revolution position.
When it moves, it engages with the regulating means and
While the orbiting force makes the regulating means inactive,
The second rotating portion moves from the first revolution position to a second revolution position;
Operating the regulating means in conjunction with the movement to the position
And a camera having operating means.

[0017]

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 16 is a diagram showing only mechanical main parts of a camera provided with a power split device according to one embodiment of the present invention.

In FIG. 16, reference numeral 6 denotes a sun gear, 7 denotes a planetary gear, 9a and 9b denote output gears serving as power sources as described below, which form part of a power split device.

The output gear 9a rotates a zoom drive gear 312 for extending and retracting a lens barrel 316 holding a lens drive mechanism by moving a cam ring 315 by a gear train 312a not shown in the figure. .

The output gear 9b meshes with the film feeding planetary gear 304 via an arm 309, and constitutes a planetary gear mechanism for film feeding with the output gear 9b. It is gear. Depending on the direction of rotation of the output gear 9b, the fork 306 or the spool 3
05 is selectively rotated, so that the film F is wound up from the film path 313 or rewound into the film path 313.

Next, the configuration of a power split device including the sun gear 6, the planetary gear 7, and the output gears 9a and 9b will be described with reference to FIGS. In these figures, the parts (gear,
(Springs, etc.) are shown, and ground plates for attaching and positioning them are omitted.

As shown in FIGS. 1 and 3, output gears 9a and 9b to which power is transmitted next to the planetary gear 7 are arranged on a circumference, and the planetary gear 7 revolves around the sun gear 6. It has a configuration that allows it. In this embodiment, the output gear is 2
The number is not limited to two, but may be two or more.

The planetary gear 7 rotates around a planetary shaft 8a, and receives a certain degree of resistance to rotation by inserting a spring 8b. The planetary shaft 8a and the planetary gear 7 are mounted on a rotating arm 5, on which a sun gear 6 is arranged.
The sun gear 6 is configured to rotate by rotation of the output shaft 3.

Although the output shaft 3 is rotated by the power of the motor 1, the output shaft 3 needs a certain amount of torque, so that in the case of a motor used in a camera, the speed reduction mechanism 2 is used. , The force is transmitted to the output shaft 3.

The rotating arm 5 and the output shaft 3 are rotatably fixed to the bearing 4.
The output shaft 3 slides and rotates inside the bearing 4. The bearing 4 is formed integrally with a base plate with a shaft (omitted in the drawing) which rotatably fixes the output gears 9a and 9b in a manner similar to insert molding. As a result, the force by which the rotating arm 5 rotates about the sun gear 6 is generated only by the revolving force of the planetary gear 7.

The rotating arm 5 has several upright bent portions (5
a, 5b, 5c), wherein a hole is formed in the upright bent portion 5a, and a hole 12b is also formed in the detent arm 12 disposed above the rotary arm 5. Has been
The rotation stop arm 12 is rotatably stopped with respect to the rotation arm 5 by a rotation arm shaft 13a inserted into these holes. As a result, the rotation stopping arm 12 rotates.
The arm 12a can be rotated about the arm shaft 13a, and the rotation is performed in a state where the rotation range is almost horizontal. Therefore, the tip portion 12c moves up and down. A hole 12a is formed in the rotation stopping arm 12, and the hole 12a
The above-mentioned planetary shaft 8a is in a penetrated state (FIG. 2).
State). In this state, since the hole 12a is an elongated hole, there is no restriction on the vertical rotation of the detent arm 12 (in other words, the vertical movement of the tip 12c), but the hole 12a is integral with the planet shaft 8a. The rotating arm 5 rotates horizontally in conjunction with the horizontal rotation of the rotating arm 5. And
A torsion spring 13b is attached to the rotating arm shaft 13a.
And urges the tip 12c of the rotation stop arm 12 upward.

The other vertical bending portion 5 of the rotating arm 5
c is a lock lever-1 attached to the shaft-equipped base plate (not shown in the figure) so as to be rotatable about the output shaft 3.
8 is provided as an operating portion for changing the operating state of the lock lever 8, and is configured to abut on the operating portion 18a of the lock lever 18.

A lock lever spring 19 is hung on the lock lever 18, and the distal end engaging portion 18b of the lock lever 18 is always engaged with the teeth of the output gear (9a in this embodiment). It is pulled by spring force. Therefore, after the power transmission to the output gear 9a by the planetary gear 7 ends, the rotation of the rotating arm 5 causes the planetary gear 7 to be switched to the output gear 9b at the same time as the output gear 9b. 9a is prevented from rotating.

Above the rotation stop arm 12, the pulse plate 1
4 is provided, the upright bent portion 5b of the rotating arm 5 is penetrated and fixed in the hole 14b formed therein, and the notch 8d of the planetary shaft 8a is fixed in the long hole 14a. The pulse plate 14 also horizontally rotates together with the horizontal rotation of the rotating arm 5.

An arm 15 is arranged above the pulse plate 14, and is rotatably stopped by an arm shaft 15b. The arm shaft 15b is also provided with a torsion spring 15c similar to the above-described rotation stopping arm 12, and its urging direction is such that one end 15a of the arm 15a is shown in FIGS. The force is directed downward in the figure. A protrusion 15e is fixed to one end 15a of the arm.
4 through the large hole 14c provided in the arm 4
Is biased downward.

A movable yoke 16a of a plunger 16 is disposed at the other end 15d of the rotating arm 15, and the plunger 16 is energized to move the movable yoke 16a downward in FIGS. When sucked, the projection 15e moves upward in the drawing. The strength of the spring balance of each of the torsion springs 13b and 15c is set so as to interlock with the movement of the rotation stopping arm 12.

The reason and effect of pushing the center when the projection 15e of the rotating arm 15 urges the rotation stopping arm 12 downward in FIG. 1, for example, will be described below.

The horizontal rotation center of the rotation stopping arm 12 which rotates further in conjunction with the rotating arm 5 which rotates horizontally in association with the revolution of the planetary gear 7 is the output shaft 3, that is, the sun gear 6. (Around 12d in FIG. 1). No matter what position the planetary gear 7 revolves, the center (12d) of the rotation stopping arm 12 is the center of rotation.
Regardless of the position of the rotation stop arm 12 in conjunction with the sun gear 6, the planetary gear 7, the rotation arm 5, and the like (for example, the state of each (a) in FIGS. 5 to 9), Under the same conditions there (12
d) can be pushed by the projection 15e of the rotating arm 15, and the tip 12c of the rotation stopping arm 12 can be moved up and down. Therefore, in order to stop the revolution of the planetary gear 7 and transmit the power to the output gears 9a and 9b, the operation for inserting the tip 12c of the rotation stop arm 12 into the notch of the crown stopper 10 is performed by the rotation arm. Fifteen projections 15e have their centers (12) regardless of the rotation state of the detent arm 12.
A simple mechanism that only urges d) may be used.

Just above the output gears 9a and 9b and the lock lever 18, that is, between the rotating arm 5 and the rotation stopping arm 12, the crown stopper 10 and the stopper 11 overlap with the main plate (not shown). Fixed. Each stopper 1
Notches are provided at 0 and 11, and the shape is such that the tip 12c of the rotation stopping arm 12 can pass through between the notches.

Further, as shown in FIG. 4 (an enlarged view of a part of FIG. 3), the crown stopper 1 with the sun gear 6 as the center.
The angle Z of the notch formed by the end faces 10a and 10b of 0, the angle Y of the notch formed by the end faces 11a and 11b of the pull-out stopper 11, and the angle X of the tip 12c of the detent arm 12.
The degrees are formed so as to satisfy the relationship of Z>Y> X. As a result, the notch of the pull-out stopper 11 is in a state like “eave” of the notch of the crown stopper 10. The notch is located above the output gears 9a and 9b. The fixed height of each of the stoppers 10 and 11 (the height in the vertical direction in FIG. 2) is set so that the following two states are possible. That is, 1) the rotation stopping arm 1 in conjunction with the suction of the plunger 16
When the tip 12c of the second arm 12 moves upward, the tip 12c of the detent arm 12 does not engage with the notch of both stoppers 10,11.

2) When the plunger 16 is not sucking, the projection 15e provided on the rotating arm 15 urges the rotation stopping arm 12 downward, so that the notch end face of the crown stopper 10 is cut. 10a and 10b are at the height of the tip 12c of the detent arm (the state of FIG. 2).

Thus, in the state of the above 1), the rotating arm 5 and the parts attached thereto (the rotation stopping arm 12, the planetary shaft 8a, the pulse plate 14, etc.) and the planetary gear 7
Can rotate freely around the bearing 4 as a unit, and the planetary gear 7 revolves freely as the output shaft 3 and the sun gear 6 rotate. At this time, the planetary gear 7 revolves while sequentially meshing with the output gears 9a and 9b arranged on the circumference.

In the state 2), the rotation of the rotation stopper arm 12 in the horizontal direction is restricted by the end faces 10a and 10b of the crown stopper 10, so that the rotation arm 5 is rotated.
Cannot rotate because it is integral with it, and stops the revolution of the planetary gear 7. This state corresponds to FIG. 2, FIG. 3, and FIG.

The planetary gear 7 whose revolution is regulated as described above rotates at that position, that is, the notch position of each of the stoppers 10 and 11, but at that time, the planetary gear 7 is just the output gear. Since it meshes with any one of 9a and 9b and forms a gear train, it is possible to transmit the rotation of the sun gear 6. The direction of rotation can be transmitted to the output gears 9a, 9b on either side.

Further, the crown stopper 10 is formed with a vertical bent portion 10c, and the vertical bent portion 10c prevents the planetary gear 7 from revolving freely. That is, even if the tip 12c of the rotation stopping arm 12 is positioned above the crown stopper 10 and the pull-out stopper 11 due to the suction of the plunger 16, even if the planetary gear 7 can freely revolve, the upright bent portion 10c will not move. Since it serves as a stopper for the tip 12c of the rotation stopping arm 12,
Revolution is stopped. However, in this position, the upright bent portion 1
Since 0c acts as a stopper, the planetary gear 7 starts to rotate.
The upright bent portion 10c is provided at a position where the upright bent portion 10c does not mesh with 9b.

When the planetary gear 7 revolves, the rotating arm 5 and the planetary shaft 8a rotate around the sun gear 6 accordingly. Therefore, the pulse plate 14 that rotates integrally therewith rotates in conjunction with the revolution of the planetary gear 7. Light and dark patterns are formed on the pulse plate 14 so that the light and dark signals (pulses) are detected by the photocoupler 17 and a pulse signal detection circuit 22 (see FIG. 17) described later. Has become. The light and dark patterns are detected by the output of the photocoupler 17 (and a pulse signal detection circuit 22 described later) when the planetary gear 7 is engaged with the output gears 9a and 9b and when it is not. It has a pattern shape as possible.

In this embodiment, the planetary gear 7 and the output gear 9
A light pattern 14e is formed so that a bright signal comes when any one of a and 9b is engaged, and a dark pattern 14d is formed so that a dark signal comes when either is not engaged (see FIG. 1). . Since the number of output gears 9a and 9b is two in this embodiment, there are two bright patterns. Thus, the revolving position of the planetary gear 7 can be determined by the output of the photocoupler 17 (and the pulse signal detection circuit 22 described later).

Next, the operation of the power split device having the above configuration will be described.

As shown in FIG. 5, the clockwise direction of the sun gear 6 is "Rv" and the counterclockwise direction is "Fw".
This depends on the direction of revolution of the planetary gears 7 and each output gear 9.
a, 9b, the rotation direction of the rotation arm 5 and the rotation stop arm 12, and the rotation direction of the motor 1. Also,
The orbiting area of the planetary gear 7 is represented by X and the numbers. This is the same as indicating the position of the tip 12c of the rotation stopping arm 12 with respect to the crown stopper 10.
X is an area including the “initial position 10d” that does not mesh with any of the output gears 9a and 9b.

Are planetary gears 7 and output gears 9a and 9b.
This area (position) is used to determine the amount of change in the “bright” and “dark” pulses of the pulse plate 14 by the photocoupler 17.
Control circuit 24, which will be described later,
(See FIG. 17). That is, the planetary gear 7
→→→→ X (FIG. 5 → FIG. 6 (a) → FIG. 7 (a)
) And Rv revolution, the light and dark patterns of the pulse plate 14 are detected from the photocoupler 17 to output light and dark signals as shown in FIG.
In the case of, the planetary gear 7 is located in the region of, and is in a state of meshing with any of the output gears 9a, 9b. In the case of "dark", it is located in the region of X ,. It can be seen that is in a state where it is not engaged with any of the output gears 9a and 9b.

In this embodiment, the area is an unused area, and the planetary gear 7 is moved from X to the upright bent portion 10c of the crown stopper 10 and the rotation stopping arm 12.
The lock lever -1 is rotatably mounted on the main plate (not shown) in such a manner that the vertical bent portion 5c of the rotary arm 5 is rotatable on the main plate (not shown).
8, the planetary gear mechanism including the rotating arm 5 repeats reciprocating motion in the region X〜.

In order to revolve the planetary gear 7, the plunger 16 is energized, and when the planetary gear 7 is revolved, if the energization of the plunger 16 is stopped when the planetary gear 7 is in any of the regions, the rotation stopping arm 12 The leading end 12c is placed on the stopper 11 (the state shown in FIG. 8).

In this state, the rotation arm 5, the rotation stop arm
Parts that rotate about the bearing 4 such as the motor 12, the planetary gear 7, the pulse plate 14, etc. are in an unstable position. That is, the tip 12c of the rotation stop arm 12 slips off the stopper 11 due to some vibration or the like,
, Fall into the notched portions of the regions (for example, the state of FIG. 9). Then, the planetary gear 7, which should not have originally meshed, and the output gears 9a, 9b mesh with each other due to vibration or the like. On the other hand, in the area of X, particularly in the range of the “initial position 10 d”, when the power supply to the plunger 16 is stopped and the tip 12 c of the rotation stopping arm 12 enters there,
Similarly to the notch of the crown stopper 10 in the other region, the planetary gear 7 cannot enter the space between the upright bent portion 10c and the end face 10e to revolve (the state of FIG. 7A). In addition, since there are no output gears 9a and 9b there is no power transmitted even when the motor 1 rotates, so that it can be considered as a so-called "neutral" position.

As described above, the planetary gear 7 has any output gear 9a,
By providing a position that can rotate on its own without revolving without engaging with 9b, that is, an “initial position”, the present apparatus can be stably stopped.

Here, the basic operation of the power split device in the present embodiment is described as follows: "A planetary gear 7 revolving around the sun gear 6 revolves around an arbitrary output gear that surrounds the circumference thereof. 9
Stop the orbit at a and 9b, and rotate the sun gear 6
Is transmitted to the output gears 9a and 9b.] An outline of the series of operations is described below.

First, when power is supplied to the plunger 16, the rotation stopping arm 12 comes off from the notch of the crown stopper 10, and the planetary gear 7 can freely revolve. Next, the motor 1 is rotated to revolve the planetary gear 7 in an arbitrary direction. At this time, the pulse plate 14 also rotates, and the rotation amount of the pulse plate 14 is detected by the output of the photocoupler 17, that is, the bright and dark pulses generated by the rotation of the pulse plate 14 are detected. By counting, it is detected where the planetary gear 7 is located in X〜. And the output gears 9a,
When it is detected that the planetary gear 7 has revolved to 9b,
De-energize the plunger 16 and turn off the rotation stop arm.
The tip 12c of the gear 12 is inserted into the notch of the crown stopper 10 to regulate the revolution of the planetary gear 7. Next, motor 1
Is transmitted to the output gears 9a and 9b to output the desired output gear 9
a, 9b.

Although the details will be described later in the section "Entering operation" and "Exiting operation", since the pulse plate 14 rotates with the revolution of the planetary gear 7, the revolving position of the planetary gear 7 is determined by the photocoupler 17. Output (bright and dark pulse change)
In the above-described operation part, when it is detected that the planetary gear 7 has revolved to the output gears 9a and 9b where power is desired to be transmitted, the energization of the plunger 16 is turned off. How the gears 9a and 9b mesh with each other, or the tip 1 of the detent arm 12
It is necessary to determine the position of the 2c with respect to the crown stopper 10 and the pull-out stopper 11, which is determined by the fall of the pulse from "bright" to "dark" and the pulse from "dark" to "bright". Is determined by the rise of That is, by using the pulse plate 14 and the photocoupler 17, it is possible to detect the rising and falling of the pulse in addition to counting the amount of change of the "bright" and "dark" pulses. By controlling the rotor 1 and the plunger 16, fine control of the "stop" of the crown stopper 10 of the rotation stop arm 12 into and out of the notch of the crown stopper 10 is performed.

Next, the "initial position setting" will be described.

The pulse plate 14 and the photocoupler 17 are used in order to know where the revolving position of the planetary gear 7 is from X to X. Since there are only two, it is possible to detect only how much the planetary gear 7 has revolved since the start of the detection, that is, only the amount of change of the pulse signal of the count. For this reason, when the apparatus starts up, it is impossible to know the location (initial state) where the planetary gear 7 was. For this reason, regardless of the state, be sure to set “Initial position 10
The operation of "determining d" is controlled so as to be performed when the apparatus is started up. This operation is called “initial position setting”.

As the movement, the plunger 16 is energized,
The planetary gear 7 is allowed to revolve, and the planetary gear 7 is unconditionally brought into the Fw orbital direction, that is, is brought into the region of ｗ. Motor 1
Is stopped, and the planetary gear 7 is stably stopped there. This state is in the region of X, more specifically, the position of the initial position 10d of the crown stopper 10. From there, the planetary gear 7 is driven by the "bright" and "dark" signals by the combination of the photocoupler 17 and the pulse plate 14. X ~
Where it is located in the area.

An important point at this time is that the planetary gear 7
At the time of revolving, the left and right revolving restrictions are abutted against each other. That is, one is the upright bent portion 10c of the crown stopper 10, the other is the operating portion 18a of the lock lever 18, the tip 12c of the detent arm 12 and the rotating arm. The position of the planet gear 7 with respect to the vertical bending portion 5c is such that the planetary gear 7 does not mesh with any of the output gears 9a and 9b as described above (the state of FIGS . 5 and 7A). ).

However, the stopper on the area side is a lock lever.
18 is also used for the operating portion 18a, so that the lock lever
Numeral 18 always tries to press the planetary gear 7 against the output gear 9a by the lock lever spring 19, and must reach the stopper area while overcoming the lock lever spring force.

In other words, the planetary gear 7 receiving the force returned by the lock lever spring 19 cannot generate a force that can overcome the force of the lock lever spring 19 only by the revolving force. Since the gear 7 cannot pass through the area of the output gear 9 when the initial position is set.
a is rotated, and the drive unit (the lens barrel 316 in this embodiment) connected to the output gear 9a is inadvertently moved.

As a countermeasure against the above problem, the output gear 9a
(In this embodiment, the output gear 9a is provided with friction by constantly pressing the zoom gear 20 next to the output gear 9a against a ground plate (not shown) by a friction spring). The gear 7 stops revolving and revolves again by using the force to rotate, and the revolving force of the lock lever spring 19 is pushed back into the area where the locking lever spring 19 pushes back by inducing the planetary gear 7 to revolve.

The relationship between the frictional force and each force is set such that the frictional force> (lock lever−spring force−revolution force).

When performing the "initial position setting": When it is not possible to determine in which region the planetary gear 7 is located at X-up when the apparatus is started up; When "misselection of the power transmission destination" described later That is, when there is a discrepancy between the position of the planetary gear 7 supposed to be stored in the control circuit 24 to be described later of the present apparatus and the position where the planetary gear 7 is actually located. Because the position is not known, even if the position detection based on the relative change is performed by using the pulse plate 14 and the photocoupler 17 in order to detect the revolving position of the planetary gear 7 thereafter, the position has no meaning.

Therefore, as the operation in the first half of the "initial position setting", after the plunger 16 is energized, the change of the pulse is not detected, that is, the planetary gear 7 is rotated by Fw to detect the pulse change in the region (the state of FIG. ), That is, until it hits in the Fw revolution. At this time, the rotation time of the motor 1 takes a time (here, "300 msec") sufficient for the planetary gear 7 to make one revolution to -X. Only by rotating the arm 5 by Fw, the upright bent portion 5c of the rotating arm 5 abuts against the stopper portion (configured on the base plate (not shown)) of the lock lever 18 while allowing the operating portion 18a of the lock lever 18 to escape. . However, as described in the "moving operation" described later, there are cases where the planetary gear 7 cannot freely revolve without first performing the Rv revolution depending on conditions. After the motor 1 is rotated Rv for a certain period of time and the planetary gear 7 revolves Rv to the position X (the state shown in FIG. 7A), F
The planetary gear 7 is abutted in the region of the planetary gear 7 by orbiting w.

In this state, it can be considered that the planetary gears 7 are located in the area. After this state, the revolving position of the planetary gear 7 is determined while detecting the change in brightness with the pulse plate 14 and the photocoupler 17 as in the conventional case.

Therefore, in the latter half of the "initial position setting" operation, the plunger 16 is energized in the first half state, the motor 1 is rotated by Rv, and the pulse change from the planetary gear 7 to the X region is detected. While revolving. In the first half operation, the planetary gear 7 is located in the normal region, and in the second half operation, the planetary gear 7 moves from the normal state to the X region.
If it can revolve, "dark" to "bright", "bright" to "dark"
Should be detected twice each.

As described above, at the abutting position of the planetary gear 7 in the revolution, the regulating member (the vertical bent portion 10c) is provided so that the planetary gear 7 does not mesh with any of the outputs 9a and 9b.
By setting this as a neutral point (neutral position) where the planetary gear 7 can revolve without revolving, even when the revolving position cannot be detected, especially when the revolving position cannot be detected, the motor 1 is rotated for a certain period of time. Neutral position (neutral position, especially the initial position 10d of the crown stopper 10), which can be rotated at the abutting position without engaging with the gears 9a, 9b and can be brought into the abutting position without inadvertently transmitting power. You can look for.

The effect of the “initial positioning” will be described below.

The "initial position setting" operation includes the planetary gear 7
However, since it also includes the operation of confirming whether or not the orbit can be surely revolved to each area in the order of →→→→ X, the device has a function of checking whether or not the present device operates normally. That is, if the planetary gear 7 can make one revolution (Rv revolution in this case) as described above, it changes from “bright” to “dark” and “dark” as shown in FIG.
To "bright" are detected. If these two pulse changes are not detected, the planetary gear 7 cannot be normally revolved, and the mechanism of the power split device It turns out that it is defective.

In FIG. 18, from "pulse count" in step 10 to step 12, it is counted whether or not there are four light and dark pulse changes. Thus, the operation of the present apparatus can be checked.

As described above, in the present apparatus in which the revolution position of the planetary gear 7 is detected by the relative change amount of the pulse signal or the like,
When the orbital position of the planetary gear 7 is determined by the "initial position setting" operation, the motor 1 is unconditionally energized in one direction for a certain period of time, and after the abutting operation is performed, the motor 1 is energized in the reverse direction. Sometimes, by detecting whether a specified number of pulse signals have been output, the operation check of the present apparatus can be performed simultaneously.

In addition to the "initial position setting" operation at the time of startup of the present apparatus (which also checks whether or not the planetary gear 7 can reliably revolve in each area between X and X), the "initial position setting" operation is also performed. Out operation. That is, although details will be described later with reference to FIGS. 17 and 19, drive signals 26a and 25b for feeding back the movements of the mechanisms 25a and 25b (see FIG. 17) for transmitting the power are respectively provided.
b (see FIG. 17) is provided. When the output gears 9a and 9b transmit power to the mechanisms 25a and 25b and the drive signals 26a and 26b do not arrive, Even in a case where the drive signal 26a, 26b comes from the mechanism 25a, 25b which does not need to transmit the power, or in the case where the division destination is selected incorrectly, it is possible to perform the selection again by performing the "initial position determination". it can.

The reason why the operation of “initial position determination” is necessary is that the orbital position of the planetary gear 7 is detected by the relative change amount due to the combination of the photocoupler 17 and the pulse plate 14 as described above. It is. This device has a planetary gear 7
If the mechanism which can detect the orbital position of an object at an absolute position is provided, the above-mentioned "initial position setting" operation is not required, but the device must be made more complicated and larger.

After the “initial position setting” operation,
Since the planetary gear 7 is surely located in the region X, specifically, in the region of the upright bent portion 10d of the crown stopper 10, the planetary gear 7 is detected therefrom by a combination of the photocoupler 17 and the pulse plate 14 while detecting the light / dark signal. If it is determined which of the output gears 9a to 9d is engaged with the output gear 7, a reliable dividing operation can be performed. Therefore, which output gear 9
In this embodiment in which it is determined only by the relative change of the light / dark signal whether or not the meshing is performed with the a and 9b, the “initial position setting” is performed for each power splitting operation, and the operation for selecting the power transmission destination can be performed reliably. Although the reliability as a device is also improved, each time the power transmission destination is changed, "initial positioning" is performed, and since the operation itself is not an actual power transmission act but a switching operation, a series of operations is performed. The operation takes a very long time.

For this reason, in the case of an operation in which power is not continuously transmitted to the output gears 9a and 9b, but an operation in which it takes a certain amount of time does not cause any problem, the "initial position setting" operation is performed as much as possible. Thus, the reliability of the device can be improved.

As described above, in an apparatus for performing position detection based only on the relative change amount, particularly in an apparatus in which the "initial position finding" operation is set, the "initial position finding" operation does not affect the entire control. In the operation part, the reliability of control of the entire apparatus can be improved by performing the “initial position determination” operation positively every time the power transmission destination is changed.

Next, as described in the above-mentioned "Basic operation of the power split device", the tip 12c of the detent arm 12 is inserted into the notch of the crown stopper 10 by turning the plunger 16 on and off. The motor 1 and the plunger 16 also perform fine movements by the "bright" and "dark" signals of the pulse plate 14, which are pulled out (removed). Or help with the action of unplugging. The “missing operation” and “entry operation” will be described below.

First, the "missing operation" will be described.

On the crown stopper 10, there is a stopper 11 having a shape very similar to that of the stopper 11. This has a shape similar to that of the crown stopper 10, but the size of the angle of the notch is set so that Z > Y > X as described in FIG. This is a condition necessary for the “missing operation”.

FIG. 12A is a model diagram when the present embodiment is viewed from the L direction as shown in FIG. 3 and FIG. . Crown stopper 10, pull-out stopper 11, and rotation stopping arm 1
2 shows the relationship between the front end 12c and the trajectory of the movement when the front end 12c of the detent arm 12 engages with or is disengaged from the notch of the crown stopper 10 or the removal stopper 11. This broken line indicates the rotation stop
The signal when the photocoupler 17 detects the bright pattern 14e and the dark pattern 14d of the pulse plate 14 that rotates in conjunction with the rotation of the arm 12, the rotating arm 5, the planetary gear 7, and the like is also shown. The thin dashed line is the “bright” signal and the planetary gear 7 is
And the bold dashed line is “dark”.
A signal indicates that the planetary gear 7 is in one of the regions X and. FIGS. 13A and 13B
Is the direction of rotation of the motor 1 when performing the above "movement operation";
"Light" and "dark" when the photocoupler 17 detects the timing of the suction of the plunger 16 and the pattern of the pulse plate 14.
12 is a timing chart showing a change in a signal, and corresponds to FIGS. 12A and 12B, respectively.

FIG. 9 shows a state in which the planetary gear 7 is located in the area and the power transmission of the "Fw" rotation of the output gear 9b is being performed (see FIG. 9B). At this time, the force for revolving the planetary gear 7 in the "Fw" direction is the rotation stopping arm 12
Is stopped by the notch (end face 10 a) of the crown stopper 10. In this state, the operation when the power transmission of the output gear 9b is stopped and the planetary gear 7 is revolved to another output gear (9a, 9c, or 9d) will be described. To remove the tip 12c of the rotation stopping arm 12 from the notch of the crown stopper 10. But,
Tip 12c of rotation stopping arm 12 and crown stopper 1
In some cases, the leading end 12c does not rise upward due to friction between the notch of 0 (end face 10a) and each end face. this is,
It is the same whether the rotation of the planetary gear 7 after the suction of the plunger 16 "Rv", that is, the rotation of the motor 1 "Fw" is continued or stopped.

In other words, if the “Rv” rotation of the planetary gear 7 continues, the tip 12c of the rotation stopping arm 12 and the notch (end face 10a) of the crown stopper 10 are always in a state of abutment. Even if the rotation of the planetary gear 7, that is, the rotation of the motor 1 is stopped, the backlash of the gear train
Since the tension generated on the teeth and the tooth surface is generated in a state where there is no gap, the tip 12c of the rotation stopper arm 12 is biased toward the notch 10a of the crown stopper. is there.

Therefore, after the plunger 16 is sucked, the motor 1 is once rotated in the reverse direction “Rv” so that there is no backlash.
In this state, the tension generated on the teeth and the tooth surface is removed, the friction between the tip 12c of the detent arm 12 and the notch (end face 10a) of the crown stopper 10 is removed, and when the friction is removed, the notch ( It must be out of the end face 10a). However, the frictional force varies greatly, and the strength of the torsion spring 13b for lifting the rotation stopping arm 12 is also generally determined by the spring balance of the attraction force of the arm torsion spring 15c and the plunger 16. Can not be set strongly. As a countermeasure, a stopper 11 is used. In other words, even if the protrusion 15e attached to the arm 15 is raised by the removal stopper 11, and the rotation stopping arm 12 is not pushed downward, the contact between the notch (the end face 10a) and the tip 12c is completely eliminated. Until the friction stops, the tip 12c of the rotation stopping arm 12 is pulled out and caught on the stopper 11 (FIG. 9).
(A) and FIGS. 10 (a) and 10 (b)).

The above operation will be described with reference to FIG.

As described above, FIG. 12 is a diagram viewed from the L direction in FIG. The planetary gear 7
It is necessary that the tip 12c of the detent arm be disengaged from the crown stopper 10 only after the revolution of the planetary gear starts in the Rv direction. It is necessary that the stopper 11 does not come off, and the stopper 11 comes out of its role.
In order to fulfill the role, the relationship of the angle (Z > Y > X) as described above is important. However, in FIG. 12, the angle is represented by the width in the horizontal direction.

In this apparatus, the tip 12c of the rotation stopping arm 12 is provided with the crown stopper 10 and the falling stopper 1
There is no detection device that knows that it has deviated from 1, that is, that it has been lifted up. The “bright” and “dark” signals of the pulse plate 14 perform the role.

That is, in FIGS. 12 (a) and 13 (a), when the crown stopper 10 and the rotation stopping arm 12 are engaged, for example, in FIG. 10, a "bright" signal is detected. However, after the plunger 16 is sucked, the motor 1 rotates at a certain interval after the suction of the plunger 16, and passes through the gap between the end surfaces 11a and 11b of the stopper 11 along the locus of the broken line in the drawing. When the arm 12 comes off, the rotating arm 5 starts to rotate "Rv", and as a result, a "dark" signal 201 (signal indicating that it is in the area of X) is detected and comes off the crown stopper 10. This is indirectly understood. After that signal, the motor 1 is rotated in the direction in which the planetary gear 7 revolves anew, that is, in the direction of the output gears 9a and 9b to which power must be transmitted next. However, for example, as shown in FIG. 12 (b), the rotation in the direction of removing the friction between the crown stopper 10 and the rotation stopping arm 17 (“Fw”), and the direction in which the planetary gear 7 revolves after the planetary gear 7 comes off from the stopper 11 If (Fw) is the same, the motor 1 is rotating in the same direction, so that it is not necessary to stop the motor 1 since a series of operations can be performed.

As shown in FIGS. 13A and 13B, the motor 1 starts rotating after a certain time 207 after the suction of the plunger 16, but this time is too short. And depending on the length of the suction time of the plunger 16,
Since the planetary gear 7 starts revolving before the projection 15e of the rotating arm 15 rises, the tip 1 of the rotation stopping arm 12
In some cases, the 2c only moves from the notch end face 11a of the stopper 11 to the end face 11b but does not come off the crown stopper 10. The time lag indicated by 207 of the suction and the rotation start takes into account the margin.

The above is the description of the "disengagement operation" from the end of power transmission to a certain output gear (here 9b) to the start of switching of the planetary gear 7 to the next output gear 9a.

By providing the detachment stopper 11 in this manner, the spring balance of the device, the characteristics of the plunger 16, the crown stopper 10, the rotation stopping arm 12
There is no change and the backlash of the frictional force due to component shape
It is not necessary to strictly control the amount of tension or the like generated on the teeth or the tooth surface in the state, and the switching operation after power transmission can be reliably performed.

Next, the revolution of the planetary gear 7 is stopped at the desired output gears 9a and 9b to start transmitting the power, that is, the rotation stopping arm 12 enters the notch of the crown stopper 10 and enters the notch operation. Will be described with reference to FIGS. 14 and 15. FIGS. 14 and 15 have the same relationship as FIGS. 12 and 13.

In the "entry operation", the removal stopper 11 itself is not necessary, but the crown stopper 10 is not required.
Even if it is above, it does not become an obstacle for the "entrance action".

For example, when trying to stop the planetary gear 7 in the area as shown in FIG. 8 , the planetary gear 7 revolves in the Fw revolution from the direction of the area, and the suction of the plunger 16 is stopped. And rotation stop
FIGS. 14A and 14B show a state in which the revolution is stopped by the system 12 and power is transmitted to the output gear 9a .
However, the difference between FIG. 14A and FIG. 14B is in which rotation the output gear 9a in the region is rotated.
FIG. 14A shows that the output gear 9a is set to Rv through the planetary gear 7.
At the time of trying to rotate, at this time the rotation stop
The tip 12c of the drum 12 is stopped by the notch (end face 10b) of the crown stopper 10. Conversely, FIG. 14B shows a case in which the output gear 9a is to be rotated Fw, and in this case, the output gear 9a is stopped by the notch (the end face 10a). In this manner, there are two ways of entering the “entrance operation” as well as the “missing operation”. This is for the following reasons.

1) The direction of revolution of the planetary gear 7 and the direction of rotation of the output gears 9a and 9b to transmit power must be the same.

2) There is no device for directly detecting whether the tip 12c of the rotation stopping arm 12 has entered the notch of the crown stopper 10.

Hereinafter, this "entry operation" will be described with reference to FIGS. 14 (a) and 15 (a).

When the planetary gear 7 revolves around Fw in a state where the plunger 16 is sucked from the direction of the area, the area enters the area from the “dark” signal 203 in the area, and the “bright” signal 2
08. If the plunger 16 continues to be sucked as it is and the planetary gear 7 keeps revolving around Fw, the plunger 16 is also out of the area,
Is detected, a "dark" signal 202 indicating the area of. Upon receiving the signal, the motor 1 rotates Rv, that is, the R of the planetary gear 7
Start v revolution. Then, a "bright" signal 204 indicating that the user has entered the area is detected, and the suction of the plunger 16 is stopped by the signal. At this time,
The tip 12c of the rotation stop arm 12 is on the stopper 11 (the state shown in FIG. 8). At this time, the rotation stop arm 1
When the frictional force is larger than the revolving force of the planetary gear 7, the rotating arm 5 and the rotating arm 5 rotate. The rotation of the stop arm 12 and the like may also stop. Therefore, it is necessary to determine the timing at which the suction of the plunger 16 is stopped, in other words, the amount of opening of the angle of the bright pattern 14e of the pulse plate 14, that is, the area of the area as follows.

"The planetary gear 7 is located at the end of the region as shown in FIG.
However, the output gear 9a is always engaged with the output gear 9a , though it is not a regular meshing position or gear interval . If the above is done, if the planetary gear 7 is in the area, the planetary gear 7
Is not revolving force generated from the spring 8b, but is "revolving" while "rotating" by meshing with the sun gear 6 and the output gear 9a . As a result, the planetary gear 7 revolves Rv irrespective of the friction caused by the contact between the rotation stopping arm 12 and the stopper 11. Then, the tip 12c of the rotation stopping arm 12 is securely pulled out and the notch of the stopper 11 (the end face 1) is removed.
1b), it is stopped by the notch (end face 10b) of the crown stopper 10. As a result, the rotation of the planetary gear 7 in the Rv direction is stopped, and at the same time, only the rotation starts, so that the output gear 9a starts the RV rotation. In this way, if the "revolution direction of the planetary gear 7 (Rv revolution in FIG. 14A) and the desired rotation direction of the output gears 9a and 9b are set to be the same", the crown stopper 10 stops the suction from the plunger 16 and stops. The revolution is stopped, and the output gears 9a, 9
It is sufficient that all the motors 1 rotate the same until b starts rotating. If the switching signal 204 from "dark" to "bright" is detected when moving from the area to the area, This means that "whether or not the tip 12c of the rotation stopping arm 12 has entered the notch of the crown stopper 10" has been indirectly but surely detected.

FIGS. 14 (b) and 15 (b) show the case where the revolving direction of the planetary gear 7 and the rotating direction of the output gears 9a and 9b are the same. Gear 9
The signal 204 moves in the same manner as after the state of the signal “dark” → “bright” of the signal 204 which means that the signal 204 has engaged with the signals a and 9b. The signal at that time is a signal 204 'in FIGS. 14 (b) and 15 (b).

The above is the description of the "entry operation".

As described above, in the "incoming operation", if the power transmission (rotation) direction of the split output gears 9a and 9b and the revolving direction of the planetary gear 7 are the same, the motor 1 Since it is not necessary to change the rotation direction of the transmission gears, the output gears 9a and 9b do not rotate in the reverse direction, and the transmission destination mechanism does not operate in the reverse direction. Then, the division destination can be selected reliably.

FIG. 17 is a cross-sectional view of FIG.
5 schematically shows circuit blocks and mechanical main parts of a camera provided with the apparatus of the present embodiment described in FIG.

In the figure, reference numeral 21 denotes ON and O of the plunger 16.
Plunger drive circuit for performing FF, 22 is the photocoupler 1
7 is a pulse signal detection circuit for detecting an output pulse, and 23 is an on / off and Rv, Fw of the motor 1 shown in FIG.
And a motor drive circuit for controlling the rotation of the motor . These are controlled by a control circuit 24. Reference numerals 9a and 9b denote the aforementioned output gears, and their power is controlled by each mechanism (lens driving system or film feeding drive) by each gear train (omitted in the figure, shown by a thick line) and the like as described in FIG. System) 25a, 25b, and drive signals 26a, 26b thereof are fed back to the control circuit 24. 27 is the aforementioned arm 1
5, a planetary gear revolving lock mechanism such as a rotation stop arm 12, a crown stopper 10, and a removal stopper 11.

Next, the operation of the portion according to the present invention of the control circuit 24 shown in FIG. 17, that is, the initial positioning operation will be described with reference to FIG.
8 will be described. "Step 1" When the battery of the camera is replaced, etc., everything is reset, and the position of the planetary gear 7 does not change to any area (X-).
Jump from chin to this subroutine, step 2
The subsequent “initial position setting” operation is started. "Step 2" The plunger 16 is turned on (driven) via the plunger drive circuit 21. At this time,
1 is not detached from the crown stopper 10 yet, but is stopped by the "eave" portion of the stopper 11 (FIG. 1).
0 state). "Step 3" Tooth without gear backlash
In order to remove the tension generated on the teeth and the tooth surface and remove the rotation stopping arm 12 from the stopper 11, the rotation of the motor 1 is rotated in a direction opposite to the rotation of the motor 1 immediately before "initial position setting". "Steps 4 to 7" The planetary gear 7 is revolved to the area indicated by, and the tip 12c of the rotation stop arm 12 is locked with the lock lever-1.
8 (the state of FIG. 5).

In this step, the revolving position of the planetary gear 7 is not detected by the pulse plate 14.
The time sufficient for the planetary gear 7 to make one revolution from or to the region of X or from the region of X (here, "300 mse
c)), the motor 1 is simply rotated unconditionally, and the tip 12c of the rotation stopping arm 12 is abutted against the operating portion 18a of the lock lever 18. As a result, the planetary gear 7 goes directly to the area, or once to the area X, and then to the next area depending on the direction in which the planetary gear 7 comes out. "Step 8" Since the planetary gear 7 is located in the area, "4" is assigned to the register n. However, here, the pulse is not positioned in the area where the pulse is counted. It is assumed that the motor 1 is rotated unconditionally and the planetary gear 7 will be positioned in the area. Only. If the planetary gear 7 is not actually located in the area, it is a rotation failure of the rotary arm 5 or the like and an operation failure of the power split device. "Step 9" The motor 1 is rotated by Rv to start revolving from the area to the area X (initial position 10d). "Step 10" In this step, a pulse change is detected. In other words, the revolution progresses from the area to the area X, and the value of the register n is set to "-1" every time there is a light-to-dark or dark-to-light pulse change. If “n = 0” and the planetary gear 7 has entered the region of X or if there has been no pulse change for a certain period of time, the process proceeds to step 11. "Step 11" Here, it is assumed that the tip 12c of the rotation stopping arm 12 has entered between the end face 10e of the crown stopper 10 and the upright bent portion 10c.
Stop driving. "Step 12" In this step, it is determined whether or not "initial position determination" has been normally performed. As a result, if the planet gear 7 revolves from the normal region to the X region and the pulse changes, there are four pulse changes, and the value of the register n becomes "0" at this point. I have. However, if the revolution of the planetary gear 7 is prevented for some reason,
“N ≧ 1” (n ≠ 0). If “n = 0”, go to step 13; if “n ≠ 0”, go to step 14
Go to each. "Step 13" Since "initial position determination" has been normally performed, the planetary gear 7 is located in the area of X, specifically, the initial position 10d. Therefore, the area (position) P0 where the planetary gear 7 is located is set to “0”. "Step 14" Since the "initial position" was not normally performed, it is considered that the planetary gear 7 could not normally revolve, and the prohibition mode is entered. "Step 15" This subroutine is completed and this routine is completed.
Chin heritage.

According to the present embodiment, when the planetary gear 7 is not engaged with the output gear 9a, the lock lever is always engaged.
Since the gear 18 and the output gear 9a are held in a meshed state, even if the zoom lens barrel 316 is inadvertently pressed by an external force, these members will not run idle. Also, the camera main switch OF
At the time of F, the collapsing operation of the lens barrel 316 is performed. Even if the planetary gear 7 is not engaged with the output gear 9a in this state, the lock lever 18 and the output gear 9 are not engaged.
Since a is held in a meshed state, it is possible to prevent the lens barrel 316 from inadvertently popping out due to vibration of the camera or the like.

(Modification) In this embodiment, one output gear (9a) for transmitting power to a mechanism that is inadvertently moved by receiving an external force is assumed to be one, but the present invention is limited to this. The other output gear (9b)
The lock lever 18 retains this rotation in a state in which it is engaged with the output gear 9b, even if the mechanism to which the power is transmitted is also inadvertently moved by receiving an external force.
The same effect can be obtained by providing a mechanism having the same mechanism as that described above in a symmetrical positional relationship.

(Correspondence between Invention and Embodiment) The above embodiment
In the first embodiment, the sun gear 6 is a planetary gear
The gear 7 is the second rotating part of the present invention, and the output gear 9a is the primary rotating part.
The lock lever 18 and the lock
Lever 19 is a rotating arm
The vertical bending portion 5c is provided with an arm 15,
The rotation stopping arm 12 and the crown stopper 10 are the present invention.
Pulse plate 14 and photocoupler 17
The control circuit 24 may be a control means according to the present invention.
Respectively.

As described above, according to the present invention, a power transmission device which can prevent malfunction with a simple configuration and
A camera can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a power split device for a camera, showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a power split device for a camera, showing one embodiment of the present invention.

FIG. 3 is a plan view of a power split device for a camera showing one embodiment of the present invention.

FIG. 4 shows a crown stopper according to an embodiment of the present invention;
It is a partial enlarged view explaining the shape of a coming-off stopper and a rotation stopping arm.

FIG. 5 is a plan view illustrating a state where a planetary gear is located in a region according to an embodiment of the present invention.

FIG. 6 is a view showing a plane and a vertical cross section in a state when the planetary gear is switched to an outgoing region in one embodiment of the present invention.

FIG. 7 is a view showing a plane and a longitudinal section in a state where a planetary gear is located in a region X in one embodiment of the present invention.

FIG. 8 is a diagram showing a plane and a vertical section in a state immediately before a planetary gear enters a region in one embodiment of the present invention.

FIG. 9 is a view showing a plane and a longitudinal section in a state where a planetary gear is located in a region according to an embodiment of the present invention.

FIG. 10 is a diagram showing a plane and a vertical cross section in a state immediately before the planetary gear comes out of a certain region in one embodiment of the present invention.

FIG. 11 is a diagram illustrating a pulse waveform serving as a position signal of a planetary gear in one embodiment of the present invention.

FIG. 12 is a diagram to help explain “missing operation” in one embodiment of the present invention.

FIG. 13 is a timing chart during the operation of FIG. 12;

FIG. 14 is a diagram to help explain the “entry operation” in one embodiment of the present invention.

FIG. 15 is a timing chart during the operation of FIG. 14;

FIG. 16 is a cross-sectional view showing a schematic mechanical configuration of a camera in which the apparatus according to the embodiment of the present invention is incorporated.

FIG. 17 is a circuit block diagram showing a configuration of a main part of a camera in which the device according to the embodiment of the present invention is incorporated.

18 is a flowchart showing an "initial position determination" operation of the control circuit of FIG.

FIG. 19 is a longitudinal sectional view and a perspective view showing a configuration of a conventional planetary gear mechanism.

20 is a plan view showing a planetary gear mechanism of a main part of FIG. 19 and an output gear to which the power is transmitted.

21 is a plan view illustrating a case where the power transmission destination of the planetary gear mechanism of FIG. 20 is set to four directions and four directions.

FIG. 22 is a plan view illustrating a case where the power transmission destination of the planetary gear mechanism is set to two systems and four directions.

[Description of sign]

 Reference Signs List 1 motor 5 rotating arm 6 sun gear 7 planetary gear 9a, 9d output gear 12 rotation stopping arm 15 rotation arm 18 lock lever 19 lock lever spring 24 control circuit

Claims (18)

(57) [Claims] And 1. A first rotating portion for transmitting a driving force, a second rotary unit revolves the first around the rotation portion of the rotation and the first in conjunction with the rotation of the rotating part, the The second rotating portion revolves and engages to drive and drive from the first rotating portion.
A power transmission system power is transmitted, and regulating means for regulating the operation of the power transmission system, the revolution and the second rotation part first
The second rotation by engaging with the regulating means when moving to the second position.
When the restricting means is brought into an inactive state by the revolving force of the revolving part ,
In both cases, the second rotating part moves from the first revolution position to the second rotation position.
The regulating means is activated in conjunction with the movement to the orbital position of
A power transmission device comprising: an operating means for setting a use state . 2. The power transmission system according to claim 1, wherein the power transmission system includes a gear for transmitting power.
System, wherein the regulating means does not operate the gear system.
The power transmission device according to claim 1, wherein
Place. 3. The control means is engaged with the power transmission system.
As a result, the working state is established, and the connection with the power transmission system is established.
It is characterized by being inactive by releasing the combination
The power transmission device according to claim 1. 4. Engaging the regulating means with the power transmission system.
Biasing means for biasing in a direction,
When the second rotating section moves to the first revolution position,
The regulating means against the urging force of the urging means by a rolling force;
Is released from engagement with the power transmission system.
The power transmission device according to claim 3. 5. The urging means according to claim 1, wherein said second rotating portion is located at the front.
Movement from the first revolution position to the second revolution position;
The regulating means is engaged with the power transmission system in conjunction with the operation.
The power transmission device according to claim 4, wherein: 6. The urging means is an elastic means.
The power transmission device according to claim 5, wherein: 7. The urging means for revolving the rotation of the second rotating part.
Holding the hand at the first revolution position against the urging force of
The power transmission device according to claim 4, further comprising a step.
Place. 8. The revolving position of the second rotating portion that revolves around
Determining means for determining, and
The second rotating part reaches the first revolution position. Before
The holding means is configured to hold the revolution of the second rotating part.
8. A control means for controlling the apparatus.
The power transmission device as described in the above. 9. The operating means, wherein the second rotating part is located at the front.
The regulating hand is linked to the movement to the first revolution position.
Moving the step to a position where the step is inactive.
The power transmission device according to claim 1. 10. A first rotating part for transmitting a driving force;
The rotation and the first rotation are interlocked with the rotation of the first rotating portion.
A second rotating part revolving around the part, and the second rotating part
Are engaged by revolving, and from the first rotating portion
A power transmission system to which a driving force is transmitted;
Regulating means for regulating the operation, and the second rotating portion comprises a first public
And when engaging with the regulating means when moving to the
The regulating means is deactivated by the revolving force of the rotating part.
And the second rotating portion moves from the first revolution position to the
In conjunction with the operation of moving to the second orbital position, the regulating means
Operating means for bringing into an operating state.
Mela. 11. The power transmission system includes a gear for transmitting power.
Gear system, and the regulating means does not operate the gear system.
The turtle according to claim 10, wherein
La. 12. The power supply system according to claim 12, wherein
Into a working state by combining with the power transmission system.
Disengaged and becomes inactive
The camera according to claim 10, wherein 13. Engaging the regulating means with the power transmission system.
Has an urging means for urging in the direction of
When the second rotating part moves to the first revolution position.
The regulating hand is turned against the urging force of the urging means by the revolving force.
Disengaging the step from the engagement with the power transmission system.
13. The camera according to claim 12, wherein 14. The urging means, wherein the second rotating portion is
Move from the first revolution position to the second revolution position
The regulating means is engaged with the power transmission system in conjunction with the operation.
14. The camera according to claim 13, wherein the camera is operated. 15. The urging means is an elastic means.
The camera according to claim 14, wherein: 16. The urging device according to claim 16, wherein the revolving motion of said second rotating part is adjusted by said urging hand.
Resists the urging force of the step Holding at the first revolution position
14. The turtle according to claim 13, comprising means.
La. 17. A revolving position of the second rotating portion which revolves.
Determining means for determining whether
When the second rotating part reaches the first revolution position,
The holding means so as to hold the revolution of the second rotating part;
And control means for controlling the pressure.
16. The camera according to item 16. 18. The operating means, wherein the second rotating portion is
The regulation is performed in conjunction with the movement to the first revolution position.
Characterized in that the means is moved to a position where it is inactive.
11. The camera according to claim 10, wherein