JPH04258933A - Power dividing device for camera - Google Patents

Abstract

PURPOSE:To prevent a power transmitting mechanism from freely moving by unpreparedly receiving external force. CONSTITUTION:An instruction means which instructs a power division control means so as to mesh/hold a planet gear 7 with/by output gears 9a and 9c coupled to the power transmitting mechanisms 314 and 316 which unpreparedly receive the external force after the transmission of the power is finished is provided.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention comprises a sun gear driven by a drive motor, a planetary gear rotating around the sun gear, a plurality of output gears each connected to a different power transmission mechanism, and a plurality of output gears each connected to a different power transmission mechanism. power division control means for meshing a planetary gear with a designated output gear and selectively transmitting the driving force transmitted to the sun gear to the output gear; and a planetary gear and the output gear that are meshed under control of the power division control means. The present invention relates to an improvement in a power splitting device for a camera, which is equipped with a holding means for maintaining a meshing state with a camera.

0002

2. Description of the Related Art A conventional general planetary gear mechanism, as shown in FIG.
an arm 102 that rotates independently of the arm 10;
The planetary gear 103 is attached to the arm 102 by a shaft 107, rotates with resistance to rotation by a spring 106, etc. against the arm 102, and meshes with the sun gear 101.

[0003] As a result, the planetary gear 103 becomes the sun gear 1.
The planetary gear 103 rotates (revolutions) around 01, and the planetary gear 103 can also rotate (rotate) by itself.

This planetary gear mechanism is generally used in cameras and the like as a switching mechanism for transmitting power for winding and rewinding film. At this time, the planetary gear 103
As shown in Fig. 33, the revolution range of the motor does not revolve 360 degrees, but is regulated by two gears, for example, gear 104 that transmits power to the winding system and gear 105 that transmits power to the rewind system. Ru. However, in reality, there is a risk that the gears may bite into each other, so the planetary gear 10
The revolution of the planetary gear 103 is restricted by abutting the shaft 107 of No. 3 against the abutting portions 109 and 110. As a result, if the sun gear 101 rotates to the left, the planetary gear 10
3 meshes with the gear 105 and rotates the gear 105 to the left as shown by the solid line arrow. Conversely, if the sun gear 101 rotates to the right, the gear 104 rotates to the right as shown by the broken line arrow. The following states occur due to this.

1) Which gear 104 or 105 to switch the power to is determined only by the left and right rotation of the sun gear 101.

2) Gears 104, 105 to which power is transmitted
The rotation direction of each is only one direction. In other words, there are two systems of power.

3) During power transmission or when gear backlash occurs in the transmission direction, the abutting portion 109 receives a force F-109 from the shaft 107. In the opposite case, the abutting portion 110 receives the force F-110.

4) When switching the planetary gear 103 from the state in which power is being transmitted to the gear 105 to the gear 104 as in the state shown in FIG. The planetary gear 103 only rotates (rotates to the left) until F-109 disappears, and then begins to revolve. The reasons why there are two systems of force as in 2) above are as follows: a) In the conventional planetary gear mechanism, as shown in FIG. 33, the planetary gear 103
Since the gears 104 and 105 regulate the revolution range of the planetary gear 103, the planetary gear 103 cannot mesh with anything other than the gears 104 and 105.

b) The rotation direction of each gear 104, 105 is
Since one direction is the power transmission direction and the other direction is the planetary gear switching direction, only one direction of force is transmitted by one gear.

[0010] For the above reasons, the number of power transmission systems is two.

On the other hand, in order to transmit more force than two systems, a planetary gear mechanism as shown in FIG. 34 can be considered. This mechanism has a plurality of gears 111a to 111d arranged on the circumference (four gears in this example), and the sun gear 101 is arranged so as not to interfere with the revolution of the planetary gear 103.
, and are in a positional relationship on the same straight line as the planetary gear 103. Each of the gears 111a to 111d has a planetary gear 103.
Stoppers 112a to 112d that prevent leftward revolution of
is arranged so that it can advance and retreat, which allows the sun gear 10 to move forward and backward.
Gears 111a~ in which the planetary gear 103 meshes with clockwise rotation of 1.
111d is selected, and when the sun gear 101 rotates counterclockwise, the stoppers 112a to 112d and the shaft 107 collide, transmitting force to each gear 111a to 111d. However, this only solves problem a) above, and problem b) remains the same. In other words, the force transmission direction of the gears 111a to 111d is only one direction as shown in FIG. 34, and the force cannot be transmitted for reverse rotation.

As shown in FIG. 34 above, gears 111a to 111d
Even if four gears are used and there are four gear trains beyond that, the force transmitted is only in one direction, so there is a problem that it is difficult to use for mechanisms that require both left and right rotation. Therefore,
If there is a planetary gear mechanism that can transmit both left and right rotational force with one gear train, it would be possible to rotate the sun gear from one power source and selectively transmit the power to multiple gear trains in left and right rotation. become.

A model diagram of the basic idea is shown in FIG.

This figure shows that by stopping the revolution of the planetary gear 103 with stoppers 113a to 113d and 114a to 114d, both the left and right rotation of the revolution can be stopped, and the rotation of the planetary gear 103 can be stopped in either direction. It is designed to transmit power.

[0015]

The state shown in FIG. 35 shows a state in which the driving force for counterclockwise rotation of the sun gear 101 is transmitted to the gear 111a. However, in this state, the other gears 111b to 111d are not engaged with the planetary gear 103, so there is nothing to restrict the rotation of these gears. For this reason, if the mechanism to which gear 111c among the gears 111b to 111d transmits power is likely to receive external force inadvertently, such as a zoom lens barrel mechanism in a camera, Furthermore, when some external force is applied to this zoom lens barrel mechanism, the mechanism tends to move by itself. Of course, if the mechanism to which the gear 111a transmits power is likely to receive external force inadvertently, the planetary gear 103
If it revolves to another position, a similar problem will occur.

In view of the above points, the present invention selectively engages a planetary gear with an output gear connected to a mechanism that may be inadvertently subjected to an external force after power transmission is completed, so that the planetary gear can be automatically engaged. It is an object of the present invention to provide a power splitting device for a camera that can prevent this mechanism from moving.

[0017]

[Means for Solving the Problems] The present invention provides a power division control means that maintains a planetary gear in mesh with an output gear connected to a power transmission mechanism that is inadvertently subjected to an external force after power transmission is completed. An instruction means is provided to give instructions.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on the illustrated embodiments.

FIG. 16 is a diagram showing only the main mechanical parts of a camera equipped with a power splitting device according to an embodiment of the present invention.

In FIG. 16, 6 is a sun gear, 7 is a planetary gear, and 9a to 9d are output gears that serve as a power source as described below, and these form a part of a power splitting device.

The output gear 9a is a lens barrel 31 that holds a lens drive mechanism such as a lens barrel 316 and a cam ring 315.
The helicoid gear 310 that feeds out and collapses the cylinder 4 is rotated by a gear train 310a (not shown).

[0022] The output gear 9b is connected to the lens barrel 314 that is being extended.
A bayoling 311, which is fixed to the main body 317 and prevents the barrel from collapsing, is rotated by a gear train 311a (not shown).

The output gear 9c is a zoom drive gear 312 that moves a cam ring 315 inside the lens barrel 314 to perform zooming.
is rotated by a gear train 312a (not shown).

The output gear 9d meshes with a film feeding planetary gear 304 via an arm 309, and these constitute a film feeding planetary gear mechanism, and the output gear 9d itself is connected to the sun. It's in gear. By rotating the output gear 9d to the left or right, the fork 306 or the spool 305 is selectively rotated, and the film F is wound up from within the film cartridge 313 or the film cartridge is rotated. Rewinding into the file 313 is performed.

Next, the configuration of the power splitting device including the sun gear 6, planetary gears 7, and output gears 9a to 9d will be explained using FIGS. 1 to 3 and the like. In order to simplify the drawings, these diagrams do not show the parts (gears, gears, etc.) necessary for power division.
Only the springs, etc.) are shown, and the base plates used to attach and position them are omitted.

As shown in FIGS. 1 and 3, output gears 9a to 9d to which power is transmitted are arranged next to the planetary gear 7 on the circumference, so that the planetary gear 7 can revolve 360 degrees. Note that although the number of output gears is four in this embodiment, it is not necessary that the number be four, and it is sufficient if there are two or more.

The planetary gear 7 is configured to rotate around a planetary shaft 8a, and is provided with a spring 8b to provide some resistance to rotation. The planetary shaft 8a and the planetary gear 7 are attached to a rotating arm 5, and a sun gear 6 is arranged on the rotating arm 5.
This sun gear 6 is configured to rotate as the output shaft 3 rotates.

The output shaft 3 is rotated by the power of the motor 1, but since the output shaft 3 requires a certain amount of rotational torque, in the case of a motor used for a camera, the reduction mechanism 2 is used. The force is transmitted to the output shaft 3 through.

The rotating arm 5 and the output shaft 3 are rotatably fixed to the bearing 4, and the rotating arm 5 is connected to the outside of the bearing 4,
Further, the output shaft 3 is adapted to rotate and slide inside the bearing 4. The bearing 4 is integrally molded by insert molding into a base plate (not shown) with a shaft that rotatably fixes the output gears 9a to 9d. As a result, the force that causes the rotating arm 5 to rotate around the sun gear 6 is generated only by the revolving force of the planetary gear 7.

The rotary arm 5 has several vertically bent portions, one of which has a hole formed in the vertically bent portion 5a, and a rotation stop located above the rotary arm 5. The arm 12 is also formed with holes 12b, and the rotation stopper arm 12 is rotatably stopped with respect to the rotation arm 5 by the rotation arm shaft 13a inserted into these holes. . This allows the rotation stopper arm 12 to move just like a ``fan'', and since the rotation range is nearly horizontal, its tip 12c moves almost vertically. Further, a hole 12a is formed in the rotation stopper arm 12, and the aforementioned planetary shaft 8a passes through this hole 12a (the state shown in FIG. 2). In this state, this hole 1
Since 2a is an elongated hole, there is no restriction on the vertical rotation of the rotation stopper arm 12 (in other words, the vertical movement of the tip 12c), but the rotary arm integrated with the planetary shaft 8a It rotates horizontally in conjunction with the horizontal rotation of the drum 5. A torsion spring 13b passes through the rotating arm shaft 13a, and urges the tip 12c of the rotation stopper arm 12 upward.

A pulse plate 1 is provided above the rotation stopper arm 12.
4 is arranged, and the bent portion 5b of the rotary 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 elongated hole 14a. As the rotary arm 5 rotates horizontally, the pulse plate 14 also rotates horizontally.

An arm 15 is arranged above the pulse plate 14, and is rotatably stopped by an arm shaft 15b. Further, the arm shaft 15b is fixed by a base plate (not shown). A torsion spring 15c similar to that of the rotation stopper arm 12 described above is applied to this arm shaft 15b, and the biasing direction is such that one end 15a of the arm is shown in FIGS. 1 and 2. The force is directed downward. A protrusion 15e is fixed to one end 15a of the arm, passes through a large hole 14c provided in the pulse plate 14, and urges the center 12d of the rotation stopper arm 12 downward.

A plunger 1 is attached to the other end 15d of the arm 15.
6 movable yokes 16a are arranged, and the plunger 1
6 is energized and the movable yoke 16a is sucked downward in FIGS. 1 and 2, the protrusion 15e moves upward in the figure. The strength of the spring balance of each torsion spring 13b, 15c is set so that the vertical movement of the rotation stopper arm 12 is linked to the movement of the protrusion 15e of the arm 15.

The reason and effect of the protrusion 15e of the arm 15 pushing the center when urging the rotation stopper arm 12 downward in FIG. 1, for example, will be described below.

The horizontal rotation center of the rotation stop arm 12 which rotates in conjunction with the rotating arm 5 which rotates horizontally in conjunction with the revolution of the planetary gear 7 is the output shaft 3, that is, the sun gear 6. (at 12d in FIG. 1). No matter what position the planetary gear 7 is revolving in, the center (12d) of this rotation stopper arm 12 is the center of rotation.
No matter what position the rotation stopper arm 12 is in in conjunction with the sun gear 6, planetary gear 7, rotary arm 5, etc. (for example, the state shown in each (a) of FIGS. 5 to 9), There under the same conditions (12
d) can be pushed by the protrusion 15e of the arm 15, and the tip 12c of the rotation stopper arm 12 can be moved up and down. Therefore, the revolution of the planetary gear 7 is stopped and the output gear 9
The operation for inserting the tip 12c of the rotation stopper arm 12 into the notch of the crown stopper 10 in order to transmit power to the rotation stopper arm 12 is performed when the protrusion 15e of the arm 15 is in the rotating state of the rotation stopper arm 12. A simple mechanism that only energizes the center (12d) regardless of the position is sufficient.

A crown stopper 10 and a pull-out stopper 11 are fixed directly above the output gears 9a to 9d, that is, between the rotation arm 5 and the rotation stopper arm 12, so as to overlap with a base plate (not shown). . Each stopper 10, 11 is provided with a notch, and the shape is such that the tip 12c of the rotation stopper arm 12 can pass through the notch.

Furthermore, as shown in FIG. 4 (partially enlarged view of FIG. 3), the crown stopper 1 is moved around the sun gear 6.
0 degree of the notch formed by the end surfaces 10a and 10b of the pull-out stopper 11, the angle Y degree of the notch formed by the end surfaces 11a and 11b of the pull-out stopper 11, and the angle X of the tip 12c of the rotation stopper 12.
It is formed so that the relationship of degree is Z>Y>X. As a result, the notch of the pull-out stopper 11 is in a state like an "eaves" of the notch of the crown stopper 10. This notch is located above the output gears 9a to 9d. The height at which each stopper 10, 11 is fixed (height in the vertical direction in FIG. 2) is set so that the following two states are possible. In other words, 1) The rotation stopper arm 1 is rotated in conjunction with the suction of the plunger 16.
When the tip 12c of the rotation stopper arm 12 moves upward, the tip 12c of the rotation stopper arm 12 does not touch the notches of the stoppers 10 and 11 (see FIG. 6, which will be described later).

2) When the plunger 16 is not suctioning, the protrusion 15e provided on the arm 15 urges the rotation stopper arm 12 downward, so that the end face 10a of the notch of the crown stopper 10 and 10b are at the height of the tip 12c of the rotation stopper arm (the state shown in FIG. 2).

As a result, in the state 1) above (the state shown in FIG. 6, which will be described later), the rotating arm 5 and the parts attached to it (the rotation stopper arm 12, the planetary shaft 8a, the pulse plate 14, etc.) The planetary gear 7 and the planetary gear 7 can freely rotate together around the bearing 4, and the planetary gear 7 freely revolves as the output shaft 3 and the sun gear 6 rotate. At this time, the planetary gear 7 revolves while meshing with the output gears 9a to 9d arranged on the circumference.

Furthermore, when the above condition 2) is reached, the rotation of the rotation stopper arm 12 in the horizontal direction is restricted by the end surfaces 10a and 10b of the crown stopper 10, so that the rotation arm 5
Since it is integrated with the planetary gear 7, it cannot rotate, and the revolution of the planetary gear 7 is stopped. This state corresponds exactly to FIGS. 2, 3, and 9.

The planetary gear 7, whose revolution is regulated as described above, will rotate at that position, that is, at the notch position of each stopper 10, 11, but at that time, the planetary gear 7 will be in the output gear position. Since it meshes with any one of the gears 9a to 9d and forms a gear train, it becomes possible to transmit the rotation of the sun gear 6. The direction of rotation can be transmitted to the output gears 9a to 9d either left or right.

Further, the crown stopper 10 is formed with a vertically bent portion 10c, and the vertically bent portion 10c prevents the planetary gear 7 from freely revolving more than 360 degrees, and only revolves for one revolution from side to side. In other words, plunger 16
Due to the suction, the tip 12c of the rotation stopper arm 12 is positioned above the crown stopper 10 and the pullout stopper 11 (
6 (to be described later), even if the planetary gear 7 is in a state where it can freely revolve, the vertical bent portion 10c is not connected to the rotation stopper arm 12.
This serves as a stopper for the tip 12c of , so that the revolution is stopped. This is the situation shown in FIG. 5 or 7. however,
In this position, the vertically bent portion 10c acts as a stopper, and the planetary gear 7 begins to rotate. Therefore, the vertically bent portion 10c is provided at a location where the planetary gear 7 does not mesh with any of the output gears 9a to 9d. ing.

When the planetary gear 7 revolves, the rotating arm 5 and the planetary shaft 8a also rotate around the sun gear 6. Therefore, the pulse plate 14 that rotates together with them rotates in conjunction with the revolution of the planetary gear 7. A bright and dark pattern is formed on the pulse plate 14, and the bright and dark signals (pulses) are detected by a photocoupler 17 and a pulse signal detection circuit 22 (see FIG. 17), which will be described later. It has become. The bright and dark patterns are detected by the output of the photocoupler 17 (and the pulse signal detection circuit 22 described later) when the planetary gear 7 is engaged with the output gears 9a to 9d and when it is not. The pattern shape is such that it can be used.

In this embodiment, the planetary gear 7 and the output gear 9a
A bright pattern 14e is formed so that a bright signal is generated when any of the elements 9d to 9d are engaged, and a dark pattern 14d is formed such that a dark signal is generated when they are not engaged (
(see Figure 1). Since there are four output gears 9a to 9d in this embodiment, there are also four bright patterns. As a result, the revolution position of the planetary gear 7 can be determined from the output of the photocoupler 17 (and a pulse signal detection circuit 22, which will be described later).

Next, the operation of the power splitting device in the above configuration will be explained.

Regarding the direction of rotation of the sun gear 6, as shown in FIG. 5(a), clockwise rotation is referred to as "Rv", and counterclockwise rotation is designated as "Fw". This is the same as the direction of revolution of the planetary gear 7, the direction of rotation of each of the output gears 9a to 9d, the rotation arm 5 and the rotation stopper arm 12, and the direction of rotation of the motor 1. Further, the region in which the planetary gear 7 revolves is represented by X and numbers from ■ to ■. This is the same as indicating the position of the tip 12c of the rotation stopper arm 12 with respect to the crown stopper 10. Further, X is a region including an "initial position 10d" that does not mesh with any of the output gears 9a to 9d.

■, ■, ■, ■ are the planetary gear 7 and the output gear 9
a to 9b are engaged with each other, and this area (position) is determined by the control circuit 24 (see FIG. ). In other words, the planetary gear 7 is
When the photocoupler 17
By detecting the bright and dark patterns of the pulse plate 14, bright and dark signals as shown in FIG. It can be seen that it is located in the region of
■, ■, and in this case, either output gear 9a
It can be seen that the parts 9d and 9d are not engaged with each other.

Note that the planetary gear 7 is connected to the crown stopper 1.
0 vertically bent portion 10c and the tip 12c of the rotation stopper arm 12
As already mentioned, it is not possible to revolve from X to ■ or from ■ to X because .

In order to make the planetary gear 7 revolve, the plunger 16 is energized, and when the planetary gear 7 is made to revolve after that, the planetary gear 7 becomes
,■,■,■ when plunger 1 is in the area
When the power supply to 6 is stopped, the tip 12c of the rotation stopper arm 12
is placed on top of the pull-out stopper 11 (the state shown in FIG. 8).

[0050] In this state, the rotating arm 5, the rotation stopper arm
Components that rotate around the bearing 4, such as the drum 12, the planetary gear 7, and the pulse plate 14, are in unstable positions. In other words, due to some kind of vibration or the like, the tip 12c of the rotation stopper arm 12 slips on the stopper 11, and
,■,■,■ falls into the notch part of the area (
For example, the state shown in FIG. 9). Then, the planetary gear 7 and the output gears 9a to 9d, which should not originally be meshed, will mesh with each other due to vibration or the like. On the other hand, in the area of Crown stopper 1 in the area of
Similar to the notch 0, the notch enters between the vertically bent portion 10c and the end surface 10e, making it impossible for the planetary gear 7 to revolve (Fig. 7(a)
) state). Furthermore, since there are no output gears 9a to 9d, no power is transmitted even if the motor 1 rotates, and it can be considered as a so-called "neutral" position.

In this way, the planetary gear 7 is connected to which output gear 9a~
By providing an "initial position" in which it can rotate on its own axis without engaging with 9d or revolving, the device can be stably stopped.

Here, the basic movement of the power splitting device in this embodiment is as follows: ``The planetary gear 7 revolving around the sun gear 6 revolves around the arbitrary output gear surrounding the sun gear 6 on the circumference. 9a to 9d, and only rotates on its own axis to transmit the power of the sun gear 6 to the output gears 9a to 9d.'' The series of operations will be briefly described below.

First, when the plunger 16 is energized, the rotation stopper arm 12 is removed from the notch of the crown stopper 10, and the planetary gear 7 becomes free to revolve. Next, the motor 1 is rotated to cause the planetary gear 7 to revolve in an arbitrary direction. At this time, the pulse plate 14 also rotates, and the amount of rotation of the pulse plate 14 is then detected by the output of the photocoupler 17. In other words, 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 among X to ■. And output gears 9a to 9 to which power is to be transmitted
When it is detected that the planetary gear 7 has revolved to the point d, the power to the plunger 16 is turned off, and the tip 12c of the rotation stopper arm 12 is inserted into the notch of the crown stopper 10, and the revolution of the planetary gear 7 is stopped. regulate. Next, the rotation of the motor 1 is transmitted to the output gears 9a to 9d, and the rotation of the motor 1 is transmitted to the output gears 9a to 9d.
~9d to transmit power.

[0054] Details will be explained later in "Entering operation" and "Exiting operation", but since the pulse plate 14 rotates with the revolution of the planetary gear 7, the revolution position of the planetary gear 7 is determined by the photocoupler 17. output (change amount of bright and dark pulses)
However, in the operation part where the planetary gear 7 turns off the power to the plunger 16 when it detects that it has revolved to the output gears 9a to 9d to which power is to be transmitted, the planetary gear 7 outputs How it meshes with the gears 9a to 9d, or the tip 1 of the rotation stopper arm 12.
It is necessary to determine what position 2c is in relation to the crown stopper 10 and pull-out stopper 11, and it is necessary to distinguish between the falling of the pulse from "bright" to "dark" and the pulse from "dark" to "bright". This is determined by the rising edge of . That is, by using the pulse plate 14 and the photocoupler 17, in addition to counting the amount of change in the "bright" and "dark" pulses, it is also possible to detect the rise and fall of the pulses. The rotor 1 and the plunger 16 are controlled, and the rotation stopper arm 12 is finely controlled to enter and exit the notch of the crown stopper 10.

Next, "initial positioning" will be described.

In order to know in which region of X to ■ the planetary gear 7 is revolving, a pulse plate 14 and a photocoupler 17 are used, and the signal is divided into bright and dark as shown in FIG. Since there are only two, the only thing that can be detected is the amount of change in how far the planetary gear 7 has revolved since the start of detection, that is, the number of counts of the pulse signal. Therefore, the location where the planetary gear 7 was located (initial state) cannot be known at the time when this device is started up. For this reason, ``No matter what the situation, always return to the ``initial position 10d''.
The system is controlled so that the operation of ``determining the value'' is performed when the device is started up. This operation is called "initial positioning."

As for the movement, the plunger 16 is energized,
Allow the planetary gear 7 to revolve, bring the planetary gear 7 unconditionally in the Fw revolution direction until it hits the region (■), and then count the pulse changes and set the ``initial position 1''.
0d'', the plunger 16 and the motor 1 are de-energized, and the planetary gear 7 is stably stopped there. This state is in the region X, specifically the initial position 10d of the crown stopper 10, and from there, the planetary gear 7 is activated by the "bright" and "dark" signals from the combination of the photocoupler 17 and the pulse plate 14. It is possible to detect where the object is located in the region from X to ■.

Important points at this time are the vertically bent portion 10c of the crown stopper 10 and the rotation stopper arm 12, which serve as abutting portions for regulating both left and right revolutions when the planetary gear 7 revolves.
As described above, the position of the planetary gear 7 with respect to the tip 12c is such that it does not mesh with any of the output gears 9a to 9d (states in FIGS. 5(a) and 7(a)).

When performing "initial positioning", ・When it is not possible to determine in which region from X to ■ the planetary gear 7 is positioned when the device is started up. In other words, when there is a discrepancy between the position of the planetary gear 7 that is supposed to be stored by the control circuit 24 of this device, which will be described later, and the actual position of the planetary gear 7, Since the position is not known, even if the position is detected by relative change using the pulse plate 14 and the photocoupler 17 in order to detect the subsequent revolution position of the planetary gear 7, the position has no meaning.

Therefore, in the first half of the "initial positioning" operation, after the plunger 16 is energized, the pulse change is not detected, that is, the planetary gear 7 is rotated Fw, and the planetary gear 7 is moved to the region (■ in FIG. 5(a)). state), that is, until it reaches the end with Fw revolution. The rotation time of the motor 1 at this time is enough time for the planetary gear 7 to make one revolution from ■ to - The tip 12c of the rotation stopper arm 12 is simply brought into contact with the vertically bent portion c of the crown stopper 10 by unconditionally rotating the rotor 1 Fw. However, as described in "Escape operation" described later, depending on the conditions, the planetary gear 7 may not be able to freely revolve unless Rv revolution is performed first, so in some cases, the above-mentioned The motor 1 is rotated Rv for a certain period of time and the planetary gear 7
After rotating in Rv to the position X (the state shown in FIG. 7(a)), it is rotated in Fw and the planetary gear 7 hits the area indicated by ■.

In this state, the planetary gear 7 can be considered to be in the region (3). After this state, the revolution position of the planetary gear 7 is determined as before by detecting changes in brightness and darkness using the pulse plate 14 and the photocoupler 17.

Therefore, in the second half of the "initial positioning" operation, the plunger 16 is energized in the first half state, the motor 1 is rotated Rv, and the planetary gear 7 is pulsed from ■ to X region. It rotates while detecting it. In the first half of the operation, the planetary gear 7 is normally located in the area ■, and in the second half of the operation, if the planetary gear 7 can revolve normally from ■ to the area It should be possible to detect four pulse changes of "dark" each time.

In this way, a regulating member (vertical bent portion 10c) is provided so that the planetary gear 7 does not mesh with any of the outputs 9a to 9d at the abutting position of the planetary gear 7,
By making this a neutral position (neutral position) where it can rotate without revolving, when the planetary gear 7 is revolving, the output can be output even if the motor 1 is rotated for a certain period of time, especially when the revolution position cannot be detected. A neutral position (neutral position, especially the initial position 10d of the crown stopper 10) that can rotate at the abutment position without meshing with the gears 9a to 9d and becomes the abutment position without inadvertently transmitting power. You can search for.

The effect of this "initial positioning" will be described below.

For this "initial positioning" operation, the planetary gear 7
However, since it also includes the operation of checking whether the device can reliably revolve in each region from ■→■→■→■→■→■→■→■→ It has a check function. In other words, as mentioned above, the planetary gear 7 makes one revolution (
Here, Rv revolution) If possible, we would detect four pulse changes from "bright" to "dark" and from "dark" to "bright" as shown in Figure 11, so if these four pulse changes are detected, If not, it means that the planetary gear 7 cannot revolve normally, which indicates that the power splitting device is mechanically defective.

In FIG. 19, from ``pulse count'' in step 10 to step 12, it is counted whether or not there are pulse changes equivalent to 8 times of brightness and darkness. This allows you to check the operation of this device.

[0067] In this way, in this device in which the rotational position of the planetary gear 7 is detected using the relative change amount of a pulse signal or the like,
When determining the rotational position of the planetary gear 7 by the "initial positioning" operation, the motor 1 is unconditionally energized in one direction for a certain period of time, and after performing the thrusting operation, the motor 1 is energized in the opposite direction. Sometimes, the operation of the device can be checked at the same time by detecting whether a specified number of pulse signals are being output.

In addition to the "initial positioning" operation (which also serves as a check to see if the planetary gear 7 can reliably revolve between X and "Positioning" operation may be performed. That is, although the details will be described later with reference to FIGS. 17 and 19, the mechanisms 25a to 25d (see FIG. 17) transmitting power each receive drive signals 26a to 25 that feed back their movements.
d (see FIG. 17), so if the drive signals 26a to 26d do not arrive while the output gears 9a to 9d are transmitting power to each mechanism 25a to 25d, Even in cases such as when the drive signals 26a to 26d come from mechanisms 25a to 25d that do not need to transmit power or the selection of the division destination is incorrect, by performing "initial positioning", the selection can be made again. can.

The reason why this "initial positioning" operation is necessary is that the revolution position of the planetary gear 7 is detected by the amount of relative change caused by the combination of the photocoupler 17 and the plunger 16, as described above. be. In the present invention, the planetary gear 7
If a mechanism capable of detecting the absolute position of the revolution is provided, the above-mentioned "initial positioning" operation will no longer be necessary, but this will require the present invention to be made more complex and larger.

Furthermore, after this "initial positioning" operation, the planetary gear 7 is reliably located in the area of In combination with the plate 14, it is possible to determine which output gear 9a to 9d the planetary gear 7 is engaged with while detecting the brightness signal, thereby making it possible to perform a reliable dividing operation. Therefore, which output gear 9a
In the present invention, which determines whether meshing with ~9d is made only by relative changes in bright/dark signals, if "initial positioning" is performed for each power division operation and a reliable selection operation of the power transmission destination is performed, the device can be used. However, if the "initial positioning" is performed every time the power transmission destination is changed, the operation itself is not an actual power transmission act but a switching operation, so it cannot be performed as a series of operations. will take a very long time.

For this reason, when the movement is not one that transmits power continuously to the output gears 9a to 9d, but there is no problem even if it takes a certain amount of time, it is preferable to perform the ``initial positioning'' operation as much as possible. Therefore, the reliability of the device can be improved.

[0072] In this way, in a device that performs position detection using only the amount of relative change, especially in a device that is set for an "initial positioning" operation, this "initial positioning" operation does not interfere with the overall control. In the operating part, by proactively performing an "initial positioning" operation each time the power transmission destination is changed, reliability of control of the entire device can be improved.

As for the part actually used, "initial positioning" is performed at step 91 in the main operation of the camera (FIG. 18), which will be described later. In this case, "initial positioning" is performed immediately before the manual rewind operation. Since the manual rewind operation itself takes a certain amount of time, "initial positioning" is performed because there is no problem even if some additional time is added here. In addition, in autoloading (steps 141 and 147 in FIG. 25), "initial positioning" is performed immediately before this operation. Since this is also an operation that takes some time like manual rewind, this "initial positioning" is performed in order to improve the reliability of the control of the entire device described above.

The "initial positioning" operation of the camera equipped with the apparatus of this embodiment will be described later with reference to FIG.

Next, as explained in the above section ``Basic Movement of Power Split Device'', by turning ON and OFF the plunger 16, the tip 12c of the rotation stopper arm 12 is inserted into the notch of the crown stopper 10, It is removed (removed), but the pulse plate 14 that takes the timing
The motor 1 and the plunger 16 also make small movements in response to the bright and dark signals to assist in the operation of inserting or removing the notch. The "exiting motion" and "entering motion" will be explained below.

First, the "exit operation" will be explained.

[0077] Above the crown stopper 10 is a pull-out stopper 11 having a shape very similar to that of the crown stopper 10. This has a shape similar to the crown stopper 10, but as explained above with reference to FIG. 4, the angle of the notch is set to satisfy Z<Y<X. This is a necessary condition for "exiting motion".

FIG. 12(a) is a model diagram when this embodiment is viewed from the L direction as shown in FIGS. 3 and 8(a) with the upper side of the paper facing upward. . Crown stopper 10, pull-out stopper 11, and rotation stopper arm 1
2, and the locus of movement when the tip 12c of the rotation stopper arm 12 engages with and disengages from the notch of the crown stopper 10 and the pull-out stopper 11 is shown by a broken line. Also, this broken line indicates the rotation stopper.
It also represents signals when the photocoupler 17 detects the bright pattern 14e and dark pattern 14d of the pulse plate 14, which rotates in conjunction with the rotation of the arm 12, the rotary arm 5, the planetary gear 7, etc. The thick broken line is the "light" signal, and the planetary gear 7 is ■,■
, ■, ■, and the thin broken line is a "dark" signal, indicating that the planetary gear 7 is in any of the regions X, ■, ■, ■, ■, respectively. In addition, FIGS. 13(a) and 13(b) show the mode when performing the above-mentioned "exit operation".
rotation direction of the cylinder 1, suction timing of the plunger 16,
Timing chart showing changes in “bright” and “dark” signals when the photocoupler 17 detects the pattern of the pulse plate 14
These correspond to FIGS. 12(a) and 12(b), respectively.

FIG. 9 shows a state in which the planetary gear 7 is in the region (■) and is transmitting the power of the "Fw" rotation of the output gear 9b (see FIG. 9(b)). At this time, the force that causes the planetary gear 7 to revolve in the "Fw" direction is exerted by the rotation stopper arm 12.
is stopped by being caught in the notch (end surface 10a) of the crown stopper 10. To explain the operation when stopping the power transmission from the output gear 9b from this state and trying to make the planetary gear 7 revolve around another output gear (9a, 9c or 9d), first of all, the plunger 16 must be energized. The user attempts to remove the tip 12c of the rotation stopper arm 12 from the notch of the crown stopper 10. but,
Tip 12c of rotation stopper arm 12 and crown stopper 1
The tip 12c may not be lifted upward due to friction with each end face of the 0 notch (end face 10a). this is,
It is the same whether the "Rv" rotation of the planetary gear 7, that is, the "Fw" rotation of the motor 1, is continued or stopped after the plunger 16 is attracted.

In other words, if the planetary gear 7 continues to rotate "Rv", the tip 12c of the rotation stopper arm 12 and the notch (end surface 10a) of the crown stopper 10 will always be in contact with each other. Even if the rotation of the planetary gear 7, that is, the rotation of the motor 1, is stopped, backlash occurs in the gear train. This is because it is biased toward one side.

Therefore, after suction by the plunger 16, the motor 1 is once rotated in the reverse direction "Rv" to remove the backlash, and the tip 12c of the rotation stopper arm 12 and the notch (end surface 10a) of the crown stopper 10 are aligned. Remove the friction, and when the friction is gone, insert the notch (end surface 10) of the crown stopper 10.
It must be done so that it deviates from a). However, the frictional force also varies in magnitude, and the strength of the torsion spring 13b that tries to lift the rotation stopper arm 12 also depends on the spring balance of the torsion spring 15c for the arm, the suction force of the plunger 16, etc. cannot be set strongly. As a countermeasure against this, a pull-out stopper 11 is used. In other words, even if the protrusion 15e on the arm 15 rises due to the pull-out stopper 11 and the rotation stopper arm 12 is no longer pushed down, the contact between the notch (end surface 10a) and the tip 12c is completely eliminated. Hold the tip 1 of the rotation stopper arm 12 until the friction disappears.
2c is caught on the pull-out stopper 11 (see FIGS. 9(a) and 10(a) and (b)).

The above movement will be explained with reference to FIG. 12(a).

As described above, FIG. 12 is a view seen from the L direction in FIG. 8(a). Due to the influence of friction, etc., the tip 1 of the rotation stopper arm does not move until the planetary gear 7 starts to revolve in the Rv direction.
2c needs to be made to come off from the crown stopper 10. In other words, it is necessary to make sure that the crown stopper 2c does not come off from the crown stopper 10 until the Rv revolution of the planetary gear 7 starts. 11 will be fulfilled. In order to fulfill its role, the angle (Z
The relationship <Y<X) is important. However, in FIG. 12, the angle is expressed by the width in the lateral direction.

Note that in this device, the tip 12c of the rotation stopper arm 12 is connected to the crown stopper 10 and the pull-out stopper 1.
There is no detecting device to know when it has deviated from 1, that is, when it has risen. This role is played by the pulse plate 14.
Light and dark signals take their place.

In other words, in FIGS. 12(a) and 13(a), when the crown stopper 10 and the rotation stopper arm 12 are engaged, for example, in FIG. 10, a "bright" signal (area marked ■) is detected. However, after suction by the plunger 16, the Rv rotation of the motor 1 is performed at a certain interval, and the motor 1 passes between the end surfaces 11a and 11b of the pull-out stopper 11 along the trajectory of the broken line in the figure and reaches the rotation stopper. - When the arm 12 comes off, the rotary arm 5 starts to rotate "Rv", and as a result, a "dark" signal (signal indicating that it is in the region of ■) shown at 201 in the figure is detected, and it comes off from the crown stopper 10. This is indirectly known. After that signal, the direction in which the planetary gear 7 is newly revolved, that is, the output gear 9 to which power must be transmitted next.
Rotate the motor 1 in directions a to 9d. However, as shown in FIG. 12(b), for example, the rotation in the direction to remove friction between the crown stopper 10 and the rotation stopper arm 17 ("Fw") and the direction in which the planetary gear 7 revolves after coming out of the stopper 11. If ("Fw") is the same, the motor 1 rotates in the same direction, so there is no need to stop the motor 1 since it can be performed as a series of operations.

Furthermore, as shown in FIGS. 13(a) and 13(b), the rotation of the motor 1 is started after a certain period of time 207 after suction by the plunger 16, but this time is too short. Depending on the length of the suction time of the plunger 16, the planetary gear 7 may begin to revolve before the protrusion 15e of the arm 15 is raised, and the tip 12c of the rotation stopper arm 12 may come off and the notch of the stopper 11 from the end face 11a to the end face 11b
There may be cases where the crown stopper 10 cannot be removed even if the crown is moved to the crown stopper 10. The time lag shown at 207 between suction and rotation start is designed to provide this margin.

The above is the "disengagement operation" from the end of power transmission to a certain output gear (here 9b) until the planetary gear 7 starts switching to the next output gear 9a, 9c or 9d). This is an explanation.

By attaching the pull-out stopper 11 in this manner, changes in frictional force and amount of backlash due to the spring balance of the device, the characteristics of the plunger 16, and the shapes of the parts of the crown stopper 10 and rotation stopper arm 12 can be controlled. There is no need to strictly control the switching operation after power transmission, and it becomes possible to perform the switching operation reliably after power transmission.

Next, the revolution of the planetary gear 7 is stopped at the desired output gear 9a to 9d, and power transmission begins, that is, the rotation stop arm 12 enters the notch of the crown stopper 10. " will be explained with reference to FIGS. 14 and 15. Note that FIGS. 14 and 15 have the same relationship as FIGS. 12 and 13 described above.

[0090] Although the withdrawal stopper 11 itself is not necessary in the "entering operation", the crown stopper 10
Even if it is on the top, it does not interfere with the "entering motion".

For example, when trying to stop the planetary gear 7 in the region (■) as shown in FIG. 9, the planetary gear 7 revolves in a Fw revolution from the direction of the region (■), and by stopping the suction of the plunger 16, the crown FIGS. 14(a) and 14(b) show the state when the revolution is stopped by the stopper 10 and the rotation stopper arm 12 and power is transmitted to the output gear 9b. However, the difference between FIG. 14(a) and FIG. 14(b) is in which rotation the output gear 9b in the region (■) is rotated. FIG. 14(a) shows a state in which the output gear 9b is rotated Rv via the planetary gear 7. At this time, the tip 12c of the rotation stopper arm 12 is connected to the notch (end surface 10b) of the crown stopper 10. It can be stopped. On the other hand, FIG. 14(b) shows a state in which the output gear 9b is rotated Fw, and at this time it is stopped by the notch (end surface 10a). In this way, just like the "exiting motion", there are two ways to enter the "entering motion". This is for the following reasons.

1) The direction of revolution of the planetary gear 7 must be the same as the direction of rotation of the output gears 9a to 9d to which power is to be transmitted.

2) There is no device for directly detecting whether the tip end 12c of the rotation stopper arm 12 is inserted into the notch of the crown stopper 10.

This "entering operation" will be explained below with reference to FIGS. 14(a) and 15(a).

[0095] When the planetary gear 7 is rotated Fw with the plunger 16 being attracted from the direction of the area ■, the "dark" signal 203 in the area ■ enters the area ■, and the "bright" signal 2
It will be 08. If the plunger 16 continues to be sucked and the planetary gear 7 continues to revolve Fw, it will also come out of the area of ■.
A "dark" signal 202 indicating the region (2) is detected. Upon receiving this signal, the motor 1 rotates Rv, that is, the R of the planetary gear 7 rotates.
v Start revolution. Then, a "bright" signal 204 is detected, which indicates that the state has entered the region (■), and the suction of the plunger 16 is stopped based on this signal. The state at this time is
The tip 12c of the rotation stopper arm 12 rests on the pull-out stopper 11 (the state shown in FIG. 8). At this time, rotation stopper arm 1
2 and the pull-out stopper 11 come into contact with each other (at the location 205) and rotate while rubbing against each other, but if this frictional force is greater than the revolving force of the planetary gear 7, the rotating arm 5 and the rotating There is a possibility that the rotation of the stop arm 12 and the like may also stop. Therefore, it is necessary to determine the timing to stop the suction of the plunger 16, in other words, the angular opening amount of the bright pattern 14e of the pulse plate 14, that is, the width of the area of ■, ■, ■, ■ as follows. .

``Even if the planetary gear 7 is located at the end of the region (■) as shown in FIG. 6, it always meshes with the output gear 9b. ] If the above is done, if the planetary gear 7 is in the region (■), the planetary gear 7 will not be affected by the revolving force generated from the spring 8b,
It "revolutions" while "rotating" by meshing with the sun gear 6 and output gear 9b. This allows the rotation stopper
The planetary gear 7 revolves in Rv regardless of the friction caused by the surface contact between the pull-out stopper 11 and the pull-out stopper 12. Then, the rotation stopper
The tip 12c of the crown stopper 12 reliably passes through the gap between the notches (end faces 11a, 11b) of the pull-out stopper 11 and is stopped by the notch (end faces 10b) of the crown stopper 10. and,
As a result, the Rv revolution of the planetary gear 7 is stopped and at the same time only the rotation is started, so the output gear 9b starts RV rotation. In this way, the direction of revolution of the planetary gear 7 (Fig.
If the Rv revolution in (a) and the desired rotation direction of the output gear 9 are set to be the same, the rotation of the plunger 16 will be stopped by the crown stopper 10 from the stop of suction, and the output gear 9 will be stopped by the crown stopper 10.
It is sufficient that the motor 1 rotates at the same speed until the motors a to 9d start rotating, and detect the switching signal 204 from "dark" to "bright" when moving from the region ① to the region ②. If you do so, insert the rotation stopper arm 1 into the notch of the crown stopper 10.
Whether the tip 12c of 2 has entered is indirectly but reliably detected.

Furthermore, FIGS. 14(b) and 15(b) are diagrams in which the direction of revolution of the planetary gear 7 and the direction of rotation of the output gears 9a to 9d are the same; gear 9
The movement is the same as after the state of the signal 204 "dark" → "bright" which means that it is engaged with a to 9b. The signal at that time is signal 20 in Fig. 14(b) and Fig. 15(b).
It is 4'.

The above is an explanation of the "entering operation".

[0099] In this way, during the "input operation", if the direction of power transmission (rotation) of the divided output gears 9a to 9d and the direction of revolution of the planetary gear 7 are made the same, the motor 1 Since there is no need to change the direction of rotation of the output gears 9a to 9d, the output gears 9a to 9d will not rotate in the opposite direction, and the mechanism to which the transmission is transmitted will not operate in the opposite direction. Then, the division destination can be selected reliably.

FIG. 17 is a diagram showing FIGS. 1 to 1 shown in FIG.
5 schematically shows a circuit block and mechanical main parts of a camera equipped with the device of the present embodiment described in No. 5.

In the figure, 21 indicates ON/OF of the plunger 16.
A plunger drive circuit that performs F, 22 is a photocoupler 17
23 is a motor drive circuit 23 that controls the ON/OFF and rotation of Rv and Fw of the motor 1 shown in FIG. controlled by Reference numerals 9a to 9d are the aforementioned output gears, and as explained in FIG. system) 25a to 25d, and the drive signals 26a to 26d are transmitted to the control circuit 24.
Feedback is provided to Further, 27 is a planetary gear revolution locking mechanism including the arm 15, rotation stopper arm 12, crown stopper 10, dropout stopper 11, etc. described above.

Next, before entering into an explanation of the operation of the control circuit 24, some effects that can be obtained by effectively utilizing this device will be explained.

<<Part 1>> When the lens barrel 314 is retracted, that is, when the main switch is OFF and the camera is not photographing, if the helicoid gear 310 that performs the retraction rotates inadvertently, the lens barrel 314 may fly out. . Therefore, when the main switch is OFF, the planetary gear 7 is in the region (3) and remains in mesh with the output gear 9a. by this,
If the motor 1 does not rotate, the gear train 31 of the lens barrel ejecting system
Since 0a also does not idle, it is a measure to prevent the lens barrel from flying out when the lens barrel is collapsed. However, as mentioned in the above-mentioned "removal operation", it is not clear in which direction (Fw or Rv) the tip 12c of the rotation stopper arm 12 is stopped in the notch of the crown stopper 10. and main switch O
The "exit operation" when performing "initial positioning" does not work properly, such as when N is selected. Therefore, after the collapsing operation is completed, the lens barrel 314 must be kept in the same state as it is, so that the backlash of the gear etc. is not released, and the lens barrel 314 is completely abutted in the collapsing direction. must be kept in good condition.

[0104] Also, as an operation performed when the main switch is OFF, there is a "manual rewind" of the film F. At this time, the planetary gear 7 meshes with the output gear 9d, but
At this time, when waiting again in the region (■) after completing the "manual rewind", the planetary gear 7 must be stopped in the region (2) by entering in a manner similar to collapsing the barrel in the case of "entering operation".

[0105] In this way, if the motor 1 is stopped while the planetary gear 7 is engaged with any one of the output gears 9a to 9d, the subsequent gear train will not idle, and the mechanism to which the power is transmitted will be locked. This has the effect of stopping unnecessary movements.

This procedure is carried out in the same way during normal shooting (when the main switch is ON), and the planetary gear 7 remains engaged with the output gear 9c connected to the zoom drive gear 312, and the zooming operation is continued. As it is, motor 1's "Fw""
After release, when winding the film, the planetary gear 7 is engaged with the output gear 9d connected to the film feeding drive system to perform winding, but after the release, the output gear is rotated again. Make sure that 9c and planet gear 7 are engaged. The reason why such an operation is necessary is that when the main switch is ON, the only mechanical parts of the camera that can be touched carelessly are the lens barrel 314 and the zoom lens barrel 316 in FIG. This is because it is the zoom lens barrel 316 that moves. In this state, the lens barrel 314 is fixed by the bayonet ring 311 and therefore does not move.

Gear locking in these two states is performed in the "collapsing operation" shown in FIG. 23 and the "zero position" flow shown in FIG. 30, which will be described later.

[0108] In this way, by leaving the planetary gear 7 meshed with its output gears 9a to 9d after power transmission is completed, or by combining it with any output gear, the mechanism to which the meshed output gears are connected can be changed. This makes it possible to prevent the wheel from spinning idly. As a result, this device can be considered not only as a device for simply transmitting power, but also as an operation locking device for various mechanisms.

[Part 2] During normal shooting, one release
After winding the film for each zoom, the planetary gear 7 is kept in mesh with the output gear 9c, and the lens barrel 3 is closed for all operations other than zooming.
However, since there is no zoom operation during continuous shooting mode, the planetary gear 7 is kept engaged with the output gear 9d during shooting, and the motor 1 is kept stationary. Rotation and stopping are repeated.

[0110] By providing the normal control mode and the continuous power transmission mode in this way, in the continuous power transmission mode, the plunger 1 can be adjusted by simply repeating the rotation and stopping of the motor 1.
6 and the photocoupler 17, and the division operation can be omitted with only the power transmission operation.

[Part 3] The present invention allows the transmission destination to be arbitrarily selected, instead of selecting the transmission destination sequentially by using a differential mechanism like the conventional power transmission distribution mechanism. Therefore, a transmission destination selection error (division error) may occur. In the case of a division error, as described above,
The situation can be determined by the drive signals 26a to 26d fed back to the control circuit 24 shown in FIG.

[0112] In this way, by providing a routine that can perform "initial positioning" and reselect the appropriate division destination in the event of a division error, it is possible to recover from malfunctions of the power division mechanism. It has the effect of acting as a starting action.

[0113] However, if the planetary gear 7 does not move normally and meshes with the wrong output gears 9a to 9d even after performing this "initial positioning" several times, the camera should be set to "inoperable".
It is necessary to provide a "prohibition mode" that allows

Next, the operation of the control circuit 24 shown in FIG. 17 will be explained with reference to FIGS. 18 to 31.

First, a series of general operations of the camera will be explained with reference to the main flowchart of FIG. "Step 70" If there is a battery replacement, etc., everything will be reset, so the planetary gear 7 is
Since it is not known whether the positions X to ■) are located, an "initial positioning" operation (details will be described later with reference to FIG. 19) is performed. "Step 71" It is determined whether the main switch is ON or not. If it is ON, the process proceeds to step 72; if the main switch is OFF, the process proceeds to step 82. "Step 72" Determine whether the lens barrel 314 is extended or not. If the lens barrel 314 is extended and ready for photographing, proceed to step 73; if the lens barrel 314 is retracted, proceed to step 79.
Proceed to the lens barrel extension operation. "Step 73" Release switch is ON or OFF
If it is ON, the process proceeds to the exposure and winding operations from step 84 onwards, and if it is OFF, the process proceeds to step 74. "Steps 74, 75" TELE switch or WI
It is determined whether the DE switch is ON or OFF, and if it is ON, the process proceeds to steps 80 and 81 in which "TELE zooming" or "WIDE zooming" operation is performed. Also, TELE
If the switch or the WIDE switch is OFF, the process advances to step 76. "Step 76" Determine whether the manual rewind switch is ON or OFF. If OFF, proceed to step 77; if ON, proceed to step 91 and subsequent steps. ``Step 77'' It is determined whether the back cover has been opened or closed, and if it is determined that a closing operation has been performed, this is a normal film loading operation, so the process proceeds to step 78, an auto-loading operation, and if it is determined that If not, step 71
Return to "Step 78" Here, an autoloading operation is performed (details will be described later with reference to FIG. 25). "Step 79" Here, the lens barrel is extended (
Details will be described later with reference to FIG. 23). "Step 80" Here, a TELE zooming operation is performed (details will be described later with reference to FIG. 26). "Step 81" Here, a WIDE zooming operation is performed (details will be described later with reference to FIG. 27). "Step 82" Since the main switch was OFF in step 71, it is determined here whether the lens barrel 314 is collapsed. As a result, if the barrel has not been collapsed, the process proceeds to step 83, a collapsing operation. If the barrel has already collapsed, the main switch is in the OFF state, so proceed to step 7.
Proceed to 6. "Step 83" Here, a lens barrel retracting operation is performed (details will be described later with reference to FIG. 24). "Steps 84 and 85" Normal "exposure" and "winding" operations of the film F are performed. Note that details of the "winding up" operation will be described later with reference to FIG. "Step 86" Determine whether or not the film F is fully wound and is in a film tension state. If so, proceed to step 91; if the film is wound normally, proceed to step 8.
Proceed to step 7 respectively. "Step 87" Is the continuous shooting mode switch ON or OFF?
F is determined, and if it is OFF, the process goes to step 89 since it is the single frame shooting mode, and goes to step 88 if it is the continuous shooting mode. "Step 88" It is determined whether or not the release switch continues to be turned on. If it remains turned on, the process returns to step 71 to continue continuous shooting, and the same photographing operation as described above is repeated. Also, if the release switch is turned off, continuous shooting is temporarily stopped, and the process proceeds to step 89 in the same way as for single-frame shooting. "Step 89" After the shooting operation, zooming, manual rewide, etc. when the camera is turned on, the planetary gear 7 is engaged with the gear train 312 of the lens barrel drive system, and the zoom lens barrel is rotated. Proceed to the "zero position" operation, detailed in FIG. 30, which locks the movement of 316. "Step 90" It is determined whether the release switch is OFF or not, and this step remains until the release switch is OFF.

Next, regarding the "initial positioning" operation, FIG.
This will be explained using 9. "Step 1" In steps 70 and 91 of FIG. 18 or steps 141 and 147 of FIG. 25, a jump is made to this subroutine, and the "initial positioning" operation starting from step 2 is started. “Step 2” Turn on (drive) the plunger 16 via the plunger drive circuit 21. At this time, the rotation stopper arm 12 has not yet come off from the crown stopper 10, but is stopped at the "eaves" portion of the pull-out stopper 11 (the state shown in FIG. 10). "Step 3" In order to remove the backlash of the gear and remove the rotation stopper arm 12 from the stopper 11,
The motor 1 is rotated in the opposite direction to the rotation immediately before "initial positioning" (details will be described later with reference to FIG. 20). "Steps 4 to 7" Rotate the planetary gear 7 to the area marked ■, and abut the tip 12c of the rotation stopper arm 12 against the vertically bent portion 10c of the crown stopper 10 (state in Fig. 5).
.

In this step, the revolution position of the planetary gear 7 is not detected by the pulse plate 14. Sufficient time for the planetary gear 7 to make one revolution from ■ to area X, or from X to area ■ (here, "500
msec), the motor 1 is simply rotated unconditionally and the tip 12c of the rotation stopper arm 12 is brought into contact with the vertically bent portion 10c of the crown stopper 10. As a result, the planetary gear 7 either goes directly to the area (2) or, depending on the direction of exit, goes to the area (X) and then goes to the area (2). "Step 8" Since the planetary gear 7 is located in the region (■), "8" is assigned to register n. However, here, the pulses are not counted and positioned in the region (■), but the motor 1 is rotated unconditionally and the planetary gear 7 is located in the area (■).
It is only assumed that the area is located at . If the planetary gear 7 is not actually located in the region (3), this means that the rotation arm 5 or the like is malfunctioning, and the power splitting device is malfunctioning. "Step 9" The motor 1 is rotated Rv to start revolution from the region (■) to the region X (initial position 10d). "Step 10" In this step, pulse changes are detected. In other words, the revolution progresses from the area of ■ to the area of X,
Each time there is a pulse change from bright to dark or dark to bright, the value of register n is set to "-1". If "n=0" and the planetary gear 7 enters the region of X, or if there is no pulse change for a certain period of time,
Proceed to step 11. The details of this operation will be described later with reference to FIG. "Step 11" Here, assuming that the tip 12c of the rotation stopper arm 12 has entered between the end surface 10e of the crown stopper 10 and the vertically bent portion 10c, the driving of the plunger 6 and the motor 1 is stopped. "Step 12" In this step, "Initial positioning"
Determine whether or not the process was performed normally. As a result, if the planetary gear 7 normally revolves from the region ■ to the region X and the pulse changes, there will be eight pulse changes, so at this point the value of register n will become "0". ing. However, if the revolution of the planetary gear 7 is prevented for some reason,
"n≧1" (n≠0). If "n=0", the process proceeds to step 13; if "n≠0", the process proceeds to step 14, respectively. "Step 13" Since the "initial positioning" has been performed normally, the planetary gear 7 is located in the area of X, specifically the initial position 10d. Therefore, the area where the planetary gear 7 is located (
position) P0 is set to "0". "Step 14" Since the "initial positioning" was not performed normally, it is assumed that the planetary gear 7 could not revolve normally and enters the prohibition mode. "Step 15" End this subroutine and return to the main routine.

Next, the "motor reverse direction energization" operation will be explained using FIG. 20. "Step 20" In step 3 of FIG. 19 and step 39 of FIG. 22, the program jumps to this subroutine and starts the "motor reverse direction energization" operation from step 21 onwards. "Steps 21, 22, 24" Determine the current rotation direction of the motor 1 or the immediately previous rotation direction when the motor 1 is stopped, and rotate the motor in the opposite direction to this rotation direction. Rotate 1. "Steps 23, 25" The new rotation direction is stored as the current rotation direction. "Steps 26 and 27" This subroutine is ended and the main routine returns.

Next, the "pulse count" operation will be explained using FIG. 21. "Step 61" In step 10 of FIG. 19 and steps 41, 46, 50, and 54 of FIG. 22, a jump is made to this subroutine, and the "pulse count" operation starting from step 62 is started. Note that this subroutine is a flow for counting the amount of change in pulses, and the counting timing is 1 regardless of "bright→dark" or "dark→bright". In the initial setting, the pulse change amount "n" from the current state until the planetary gear 7 revolves is determined. "Step 62" If the planetary gear 7 stops rotating,
For example, if the planetary gear 7 is in the X or ■ region and the Fw or Rv revolution is stopped as shown in Figure 5 or 7, or if the revolution is stopped due to some kind of obstacle, the change in pulses is constant. In order to determine whether the pulse has stopped changing for a period of time, the timer is reset and started every time the pulse changes. "Step 63" Pulse "bright → dark", "dark → bright"
Detect changes in If there is no change, the process proceeds to step 64; if there is a change, the process proceeds to step 65. "Step 64" If there is no pulse change, it is determined whether a certain period of time has been exceeded. If it has not been exceeded, the process returns to step 62 and waits for a change. If it is over, step 6
Proceed to step 7. "Steps 65, 66" There was a pulse change, so
Decrease the value of register n indicating the amount of change by "1". As a result, if "n=0", it is assumed that the required amount of revolution of the planetary gear 7 has been completed, and the process proceeds to step 67. "Step 67" This subroutine is ended and the main routine returns.

Next, the "power division" operation will be explained using FIG. 22, but before that, symbols used in this explanation etc. will be explained using FIG. 31.

As shown in FIG. 31, P0 is currently the planetary gear 7.
P1 is the position where P1 is the position you are about to go to, M0 is the rotation direction of motor 1 in the past, M1 is the motor rotation direction of the load at the position you are about to go to, M
2 is the direction in which the rotating arm 5 is moved. Further, the relationship between the driving operation, the dividing position, and the rotational direction of the motor 1 is as shown in the drawing. “Step 30” Steps 102 and 108 in FIG. 23
, steps 125, 128, etc. in FIG. 24 jump to this subroutine and start the "power division" operation from step 31 onwards. Note that at the start of this operation, the output gears 9a to 9d to which power is to be transmitted are
There are inputs for the position P1 and the rotation direction M1. However, output gears 9a, 9b, 9c, 9d are ■, ■, ■, ■
corresponds to the position of "Step 31, Step 31'" Now, planetary gear 7
It is determined whether the position (P0) of the output gear engaged with the output gear (P1) is the same as the position (P1) of the output gear at the desired destination.
0=P1), the motor 1 is rotated M1 as it is. Otherwise, proceed to step 32. "Step 32" Determine in which direction the planetary gear 7 should revolve, that is, "P1>P0", and
P1>P0'', the process advances to step 35; otherwise, the process advances to step 33. "Steps 33 to 36" Rotation direction M of rotating arm 5
2 (that is, the direction of revolution of the planetary gear 7) is "Rv" or "F"
w”. Then, calculate how many pulses there are for the pulse change to the desired output gears 9a to 9d ("P1-P0").
) and store this value in register N.

[0122] From now on, the "exit operation" begins. "Step 37" Turn on the plunger 16. If this plunger 16 remains ON, the rotation stopper arm 12
is stopped at the "eaves" part of the pull-out stopper 11. "Step 38" It is determined whether the rotational direction M2 of the rotary arm 5 and the direction in which the rotation stopper arm 12 abuts against the crown stopper 10 are the same or not based on whether "M2=M0". If the results are the same, it is necessary to reverse the rotation to remove the backlash as described above, and then the process proceeds to step 38. "Steps 39-42" Motor 1 "exit operation"
Rotate it in the opposite direction to the direction of rotation just before it enters the
12(a), Fig. 1
3(a), 201). If not detected, step 59
Proceed to prohibition mode. "Step 43" Since it has exited in the opposite direction to the desired direction M2, one pulse change from "bright to dark" has been detected, so the pulse change from the desired output gears 9a to 9d is calculated by one. Increase the number of doses (“N+1”). "Step 44" The planetary gear 7 is started to revolve to the desired output gear 9a to 9d.

[0123] At this stage, the "exit operation" ends. "Steps 45-47" Desired output gears 9a-9d
The planetary gear 7 is revolved to the dark pulse part one place before the bright pulse. If the revolution does not go well and the pulse does not change for a certain period of time, the process advances to step 59.

[0124] From now on, the "entering operation" begins. "Step 48" Even if this flow is completed, if the motor 1 is continued to rotate, power will be transmitted in the rotational direction. It is determined whether the direction M2 in which the rotary arm 5 has rotated (the direction of revolution of the planetary gear 7) is the same as the rotation direction of the motor 1 during power transmission by "M1=M2", and if it is the same, it is left as is. The process proceeds to step 56, and if not the same, the process proceeds to step 49. "Steps 49 to 51" The planetary gear 7 once passes the desired output gears 9a to 9d, makes a U-turn, and then engages with the desired output gears 9a to 9d in the first part of the flow where transmission begins. Confirm that a dark signal (202 in FIGS. 14(a) and 15(a)) is detected from the bright signal indicating that the mesh is disengaged. If not detected, the process proceeds to step 59; if not detected, the process proceeds to step 52. "Steps 52-55" Start a U-turn. Rotate the motor 1 in the power transmission direction. As a result, the desired output gears 9a to 9d and the planetary gear 7
A “dark → light” signal (Fig. 14 (
a), 204 in Fig. 15(a) and Fig. 14(b), Fig. 15(
Confirm that 204') in b) is detected. If not detected, the process proceeds to step 59; if not detected, the process proceeds to step 56. "Step 56" Turn off the plunger 16. From this, as explained in FIG. 8, the tip 12c of the rotation stopper arm 12 slides on the stopper 11 and enters the notch of the crown stopper 10, and the revolution of the planetary gear 7 is stopped, causing it to rotate only on its axis. Then, power transmission begins.

[0125] At this stage, the "entering operation" is completed. "Step 57" The current position P0 of the planetary gear 7 and the rotational direction M0 of the motor 1 are stored. "Step 58" This subroutine is ended and the main routine returns. "Step 59" Here, plunger 16 and motor
Turn off data 1. "Step 60" A prohibition mode is set in which the camera is "inoperable".

Next, regarding the "lens barrel extension" operation, FIG.
Explain using. "Step 100" At step 79 in FIG. 18, the program jumps to this subroutine and starts the "lens barrel extension" operation from step 101 onwards. “Steps 101, 102” Helicoid gear 310
rotate to move the lens barrel 314 in the direction (P1=7, M
1=Fw), the planetary gear 7 is rotated to mesh with the output gear 9a, and power is transmitted via the gear train 310a. "Step 103" The mode remains until the lens barrel is completely extended.
Step 1 is completed by rotating the motor 1 and detecting completion.
Proceed to 04. "Steps 104-106" Bayonet ring 31
1 in the locking direction (P1=5, M1=R
v) Rotate the motor 1 via the output gear 9b and the gear train 311a until the bayonet ring 311 fixes the lens barrel 314. "Steps 107 to 110" The zoom gear 312 is rotated and the zoom lens barrel 316 is extended to the WIDE end via the cam ring 315. "Step 111" This subroutine ends and returns to the main routine.

Next, regarding the "lens barrel retraction" operation, FIG.
Explain using. "Step 120" At step 83 in FIG. 18, the program jumps to this subroutine and starts the "lens barrel retraction" operation from step 121 onwards. "Steps 121-123""P1=3, M1=R
v'', the planetary gear 7 is caused to revolve, meshing with the output gear 9c, the zoom gear 312 is rotated, and the zoom lens barrel 316 is housed in the lens barrel 314 via the cam ring 315. "Steps 124-126""P1=5, M1=F
w'', the planetary gear 7 is revolved and engaged with the output gear 9b, and the bayonet ring 311 is rotated to unlock the lens barrel 314. "Steps 127-129""P1=7, M1=R
v", the planetary gear 7 is revolved, it is engaged with the output gear 9a, the helicoid gear 310 is rotated, and the lens barrel 3 is rotated.
14 is collapsed. "Step 130" The motor 1 is turned off while the backlash in the lens barrel retracting direction remains in the gear train 310a. This prevents the lens barrel 314 from accidentally popping out. "Step 131" This subroutine ends and returns to the main routine.

Next, the "autoloading" operation will be explained using FIG. 25. "Step 140" In step 78 of FIG. 18, a jump is made to this subroutine, and the "autoloading" operation starting from step 141 is started. "Step 141" The above-mentioned "initial positioning" operation is performed to bring the planetary gear 7 to the initial position. “Steps 142, 143” “P1=1, M1=R
v'', the planetary gear 7 is rotated, meshed with the output gear 9d, and the planetary gear 7 is rotated so as to rotate the output gear 9d in the winding direction to transmit power. As a result, the film feeding planetary gear 304 forming a normal planetary gear mechanism rotates with the film feeding planetary arm 309.
It engages with a winding gear (not shown) and rotates the spool 305. As a result, winding of the film F from the film cartridge 313 is started. "Steps 144 to 146" A normal autoloading operation is performed. "Steps 147 and 149" This is the flow when autoloading does not go well.The "initial positioning" operation is performed, and normally the film F is reloaded, so when the back cover is opened, the next step is to Proceed to step. "Step 148" A "zero position" operation is performed to lock the gear in the flow that passes when autoloading is completed (details will be described later with reference to FIG. 30). "Step 150" This subroutine ends and returns to the main routine.

Next, the "TELE zooming" operation will be explained using FIG. 26. "Step 180" At step 80 in FIG. 18, the program jumps to this subroutine and starts the "TELE zooming" operation from step 181 onwards. "Steps 181, 182""P1=3, M1=F
w'', the planetary gear 7 revolves, meshes with the output gear 9c, and power is transmitted from this output gear 9c.
Rotate ELE. "Steps 183 to 185" Gear train 312a, Z-
Normal TELE operation is performed via the system drive gear 312. "Step 186" This subroutine ends and returns to the main routine.

Next, the "WIDE zooming" operation will be explained using FIG. 27. "Step 190" At step 81 in FIG. 18, the program jumps to this subroutine and starts the "WIDE zooming" operation from step 191 onwards. “Steps 191, 192” “P1=3, M1=R
V'', the planetary gear 7 is rotated, meshed with the output gear 9c, and power is transmitted from the output gear 9c to generate W.
Rotate the IDE. "Steps 193 to 195" Similar to "TELE zooming", a normal WIDE operation is performed via the gear train 312a and the zoom drive gear 312. "Step 196" This subroutine ends and returns to the main routine.

Next, the "winding" operation will be explained using FIG. 28. "Step 160" In step 85 of FIG. 18, the program jumps to this subroutine and starts "winding" the film F. "Steps 161, 162" Similar to autoloading, specify "P1=1, M1=Rv", make the planetary gear 7 revolve, mesh with the output gear 9d, and
d and the spool 305 is rotated through gears 304 and 308 for film feeding. "Steps 163 to 165" A normal film F winding operation is performed. "Step 166" This subroutine ends and returns to the main routine.

Next, the "rewind" operation will be explained using FIG. 29. "Step 170" At step 92 in FIG. 18, the program jumps to this subroutine and starts the "rewinding" operation of the film F from step 171 onwards. "Steps 171, 172" The position where the planetary gear 7 revolves is "P1 = 1" as in the case of winding, so the output gear 9
d, but since the rotation direction is "M1=Fw", the output gear 9d also rotates Fw. Therefore, the film feeding planetary gear 304 rotates the film feeding winding gear 308, and then rotates a fork gear (not shown). "Steps 173 to 175" A normal film F rewinding operation is performed. "Step 176" A "zero position" operation described later is performed. "Step 177" This subroutine ends and returns to the main routine.

Next, the "zero position" operation will be explained using FIG. 30. “Step 200” Step 89 in FIG. 18, FIG. 25
In step 148 of , step 176 of FIG.
The program jumps to this subroutine and starts the "zero position" operation from step 201 onwards. As already mentioned, this "zero position" operation is, for example, when the main switch is turned on.
Sometimes the planetary gear 7 is used as the output gear 9c for zooming, and when the main switch is OFF, the output gear 9a is used.
This is to keep the lenses engaged and prevent the zoom lens barrel 316 and lens barrel 314 from moving inadvertently. "Step 201" Is the lens barrel retraction switch ON or O?
FF is determined, and if it is ON, it is assumed that the main switch is in the OFF state and the process proceeds to step 204, and if it is OFF, the main switch is assumed to be in the ON state and the process proceeds to step 202. "Steps 202, 203""P1=3, M1=F
w", the planetary gear 7 is caused to revolve, and the output gear 9c connected to the zoom mechanism is engaged with the planetary gear 7. This makes it possible to perform the zooming operation immediately in the next photographing. This operation also acts as a locking function for the zoom lens barrel 316, so the zoom
Even if the lens barrel 316 is pushed carelessly, it will not cause any trouble. Note that the transition from step 201 to this step occurs only when jumping from step 89 in FIG. 18 to this subroutine. "Steps 204 to 206" In the state where the planetary gear 7 and the output gear 9a are engaged, the barrel is slightly collapsed. In reality, the lens barrel 314 is retracted and does not move, but by stretching the gear train 310a and the helicoid gear 310 to some extent (providing backlash), it is possible to reliably lock the lens barrel 314. . Note that the transition from step 201 to this step is shown in FIG.
29 or step 176 in FIG. 29. "Step 207" Motor 1 is turned off. As a result, unless the motor 1 rotates as described above, the zoom
The lens barrel 316 or the lens barrel 314 does not move. "Step 208" This subroutine ends and returns to the main routine.

According to this embodiment, after film winding is completed, the planetary gear 7 is held in mesh with the output gear 9c, and in the shooting state when the switch is ON, automatic loading and film rewinding are performed. When the zoom lens barrel 316 or lens barrel 314 is inadvertently pushed, since the planetary gear 7 is held in the meshed state with the output gear 9c (see FIG. 30). Even if this happens, these members will no longer spin idly. When the switch is OFF, after the lens barrel 314 is collapsed by the retracting operation of the helicoid 310, the planetary gear 7 remains engaged with the output gear 9a connected to the helicoid gear 310, or when the switch is OFF, After auto-loading or film rewinding, the lens barrel 314 is engaged with the planetary gear 7 and the output gear 9a.
This prevents the camera from accidentally flying out due to camera vibrations, etc.

[0135]

[Effects of the Invention] As explained above, according to the present invention,
After power transmission is complete, a planetary gear is selectively engaged with the output gear connected to a mechanism that may be inadvertently exposed to external force, to prevent this mechanism from moving unintentionally. ing.

[Brief explanation of the drawing]

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

FIG. 2 is a longitudinal sectional view of a power splitting device for a camera showing an embodiment of the present invention.

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

FIG. 4: A crown stopper in one embodiment of the present invention.
FIG. 2 is a partially enlarged view illustrating the shapes of a pull-out stopper and a rotation stopper arm.

FIG. 5 is a plan view and a longitudinal cross-sectional view of the planetary gear located in the region (3) in an embodiment of the present invention.

[Fig. 6] In one embodiment of the present invention, the planetary gear changes from ■ to ■.
FIG. 3 is a diagram showing a plane and a vertical cross section of a state when switching to a region of FIG.

FIG. 7 is a plan view and a longitudinal cross-sectional view of a planetary gear positioned in an area X in an embodiment of the present invention.

FIG. 8 is a plan view and a longitudinal cross-sectional view of the planetary gear in a state immediately before entering the region (3) in an embodiment of the present invention.

FIG. 9 is a plan view and a longitudinal cross-sectional view of the planetary gear located in the region (■) in an embodiment of the present invention.

FIG. 10 is a plan view and a longitudinal cross-sectional view of the planetary gear in a state immediately before it leaves a certain area in an embodiment of the present invention.

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

FIG. 12 is a diagram to help explain the "exit 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 "entering 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 incorporating an embodiment of the present invention.

FIG. 17 is a circuit block diagram showing the main part configuration of a camera incorporating an embodiment of the present invention.

18 is a flowchart showing the main operation of the control circuit 24 of FIG. 17. FIG.

19 is a flowchart showing the "initial positioning" operation of the control circuit 24 of FIG. 17. FIG.

20 is a flowchart showing the "motor reverse direction energization" operation of the control circuit 24 of FIG. 17; FIG.

[FIG. 21] "Pulse count" of the control circuit 24 in FIG. 17
It is a flowchart showing the operation.

22 is a flowchart showing the "power division" operation of the control circuit 24 of FIG. 17;

23 is a flowchart showing the "collapse and pay out" operation of the control circuit 24 of FIG. 17; FIG.

FIG. 24 is a flowchart showing the "collapsing" operation of the control circuit 24 of FIG. 17;

25 is a flowchart showing the "autoloading" operation of the control circuit 24 of FIG. 17. FIG.

26 is a flowchart showing the "TELE zooming" operation of the control circuit 24 of FIG. 17;

27 is a flowchart showing the "WIDE zooming" operation of the control circuit 24 of FIG. 17. FIG.

28 is a flowchart showing the "winding" operation of the control circuit 24 of FIG. 17. FIG.

29 is a flowchart showing the "rewind" operation of the control circuit 24 of FIG. 17;

30 is a flowchart showing the "zero position" operation of the control circuit 24 of FIG. 17;

31 is a diagram illustrating the relationships among the symbols, drive operations, division positions, and motor directions used in explaining various operations of the control circuit 24 in FIG. 17; FIG.

FIG. 32 is a longitudinal section and a perspective view showing the configuration of a conventional planetary gear mechanism.

33 is a plan view showing the main part of the planetary gear mechanism in FIG. 32 and the output gear to which the power is transmitted; FIG.

34 is a plan view illustrating a case where the planetary gear mechanism of FIG. 33 transmits power to four systems and four directions; FIG.

35 is a plan view illustrating a case where the planetary gear mechanism of FIG. 33 transmits power to four systems and eight directions; FIG.

[Explanation of sign]

1 Motor 5 Rotating arm 6 Sun Gear 7 Planetary Gear 9a-9d Output gear 12 Rotation stopper arm 14 Pulse plate 15 Arm 16 Plunger 24 Control circuit

Claims (1)

[Claims] 1. A sun gear driven by a drive motor, a planetary gear rotating around the sun gear, a plurality of output gears each connected to a different power transmission mechanism, and a plurality of output gears connected to the planetary gear. power division control means that meshes with an output gear and selectively transmits the driving force transmitted to the sun gear to the output gear; and a state of meshing between the planetary gear and the output gear that are meshed under control of the power division control means is maintained. In the power splitting device for a camera, the power splitting device is configured such that after the end of power transmission, the planetary gear is meshed with and held by the output gear connected to the power transmission mechanism, which is inadvertently subjected to external force. A power splitting device for a camera, characterized in that it is provided with instruction means for instructing the splitting control means.