JPH04258938A - Power dividing device for camera - Google Patents

Abstract

PURPOSE:To prevent a mechanism having anxiety that it unpreparedly receives external force from freely moving and to surely execute a power transmitting action thereafter. CONSTITUTION:An instruction means 24 which instructs a power division control means so as to mesh a planet gear with an output gear coupled to a power transmitting mechanism which may unpreparedly receive the external force after the transmission of power is finished and so as to stop the transmission of the power to the output gear at the same time, an engagement control means 24 which executes such an action that the planet gear is previously meshed with the output gear again in advance when the power is started to be transmitted to the output gear coupled to the power transmitting mechanism which unpreparedly receives the external force, an AND and an FF are provided.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a power division control means for meshing a planetary gear with a designated output gear and selectively transmitting the driving force transmitted to a sun gear to the output gear, and the power division control means. The present invention relates to an improvement in a power splitting device for a camera, which is provided with a holding means that maintains the meshed state of a planetary gear and an output gear that are meshed together under the control of the invention.

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. 35, 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 reason why there are two systems of force as in 2) above is that a) the conventional planetary gear mechanism has a planetary gear 103 as shown in FIG.
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. 22 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. That is, the force transmission direction of the gears 111a to 111d is only in one direction as shown in FIG. 22, and the force cannot be transmitted for reverse rotation.

As shown in FIG. 22, 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.

The state in FIG. 23 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, other gears 111b to 11
1d does not mesh with the planetary gear 103, so there is nothing to restrict the rotation of these gears. Therefore, among the gears 111b to 111d, for example, the mechanism to which the power is transmitted to the gear 111c is likely to receive external force inadvertently,
For example, in the case of a variable focal length mechanism in a camera, there is an inconvenience that if some external force is applied to this mechanism from outside the camera, the mechanism will move by itself. Of course, if the mechanism to which the gear 111a transmits power is likely to receive external force inadvertently, the same problem may occur if the planetary gear 103 revolves to another position after the power transmission is completed. will occur.

In order to solve the above problem, after the power transmission is completed, the planetary gear 103 is selectively engaged with the gear connected to the mechanism that is likely to receive external force inadvertently, and this state is maintained. It is possible to do so. However, when the planetary gears 103 are selectively engaged, there are the following problems.

[0017]

In FIG. 23, the stoppers 113a to 113d and 114a to 114d are for locking the revolution of the planetary gear 103 as described above, and are configured to be able to move forward and backward relative to the planetary gear 103 and the shaft 107. It becomes. Here, each stopper 113a to 113d, 11
4a to 114d are in the retracted state and the planetary gear 103 is able to revolve, consider a case where, for example, as shown in FIG. 36, the planetary gear 103 and the gear 111a are engaged to prevent the mechanism connected to the gear 111a from spinning.

At this time, a device (not shown) detects that the planetary gear 103 engages with the gear 111a while revolving, and thereby the stoppers 113a, 114a are moved in as shown in the figure to lock the revolution of the planetary gear 103. . At this time, the planetary gear 103 starts rotating from the moment the revolution is locked. Therefore, unless the rotation of the sun gear 101 is stopped at the moment when the revolution of the planetary gear 103 is locked, the rotation will rotate the gear 111a. Therefore, the rotation of the sun gear 101 is stopped and the stoppers 113a, 114a
If the timing of the revolution locking is not performed accurately, the mechanism connected to the gear 111a that is ``capable of functioning even when not in the abutting state'' will move.

In other words, a mechanism that uses only the abutment state is a mechanism that uses only the tele end or wide end, such as the lens barrel of a bifocal camera, and can function even when it is not in the abutment state. The term "mechanism" refers to a mechanism in a camera having a zoom mechanism that allows the zoom function to be performed at the middle position even when the lens barrel is not in the telephoto end state or the wide end state.

When the planetary gear 103 is engaged with the gear connected to the zoom mechanism as described above, the zoom mechanism may malfunction at the moment the stoppers 113a and 114a are applied to prevent the zoom mechanism from spinning. I move to get ready. Also,
In order to prevent this inconvenience from occurring, it is conceivable to stop the rotation of the sun gear 103 before the revolution lock is applied, but this would be the same as not having the stoppers 113a and 114a, so the zoom mechanism It may become impossible to lock or transmit power.

In view of the above points, it is an object of the present invention to selectively engage a planetary gear with an output gear connected to a mechanism that may be inadvertently subjected to an external force, thereby preventing the mechanism from moving without permission. It is an object of the present invention to provide a power splitting device for a camera that can prevent the camera from being put away and also ensure the subsequent power transmission operation.

[0022]

[Means for Solving the Problems] The present invention provides power division control means for 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 the control of the power division control means. a retaining means for retaining the engaged state;
After the power transmission is completed, the power division control means is configured to cause the planetary gear to mesh with the output gear connected to the power transmission mechanism that is inadvertently subjected to external force, and at the same time stop the power transmission to the output gear. When starting the power transmission to the output gear connected to the power transmission mechanism that inadvertently receives the external force, the planetary gear is engaged with the output gear again. A meshing control means is provided for causing the operation to be performed.

[0023]

[Operation] When starting power transmission to an output gear connected to a power transmission mechanism that is inadvertently subjected to an external force, the meshing control means causes the planetary gear to mesh with the output gear again. will be made to do so. This results in
Even if the operation in which the output gear connected to the power transmission mechanism and the planetary gear are engaged with each other is not performed normally, and is inadvertently subjected to an external force, as instructed by the instruction means, the same operation is performed again. Since this is repeated, power transmission to the output gear is started after these gears are securely engaged.

[0024]

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 split 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 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).

The output gear 9b is 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 designed to rotate around a planetary shaft 8a, and by inserting a spring 8b, a certain degree of resistance to rotation is provided. 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 speed 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 rotating arm 5 has several vertically bent portions, and a hole is formed in the vertically bent portion 5a, and a rotation stop located above the rotating arm 5 is provided. 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 rotation 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 rotary 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 surface 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 moves toward the common axis 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 this vertically bent portion 10c prevents the planetary gear 7 from freely revolving more than 360 degrees, and only revolves for one right and left rotation. 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 rotation direction of the sun gear 6, as shown in FIG. 5(a), clockwise rotation is referred to as "Rv", and counterclockwise rotation is referred to 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.

[0053] ■, ■, ■, ■ 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).

[0056] In this state, the rotation arm 5 and 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 disengaged 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.

[0060] Details will be explained later in "Entering operation" and "Extracting 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. At this time, the rotation time of the motor 1 is sufficient for the planetary gear 7 to make one revolution from ■ to The tip 12c of the rotation stopper arm 12 is simply abutted against the vertically bent portion c of the crown stopper 10 by unconditionally rotating 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 Rotate the motor 1 Rv for a certain period of time to move the planetary gear 7 to position X (
After Rv revolution to the state shown in FIG. 7(a), Fw revolution is performed and the planetary gear 7 hits in the region (■).

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 checking 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.

[0072] 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, etc.,
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.

[0073] 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, the mechanisms 25a to 25d (see FIG. 17) that transmit power are each equipped with a circuit section that generates drive signals 26a to 25d (see FIG. 17) that feed back their movements. Output gears 9a-9d are connected to each mechanism 25a-
When transmitting power to 25d, the drive signal 26a
26d does not come, or when the drive signals 26a to 26d come from mechanisms 25a to 25d that do not need to transmit power, or if the division destination is selected incorrectly, by performing "initial positioning". , you can make the selection again.

The reason why this "initial positioning" operation is necessary is because 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 region 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.

[0077] 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.

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.

[0080] 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 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 mentioned 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.

That is, 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 with ■) 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.

[0093] 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 attraction 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 that directly detects 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 using FIGS. 14(a) and 15(a).

[0098] 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 ①. 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".

[0102] In this way, during the "ongoing 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.

[0104] 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.

[0105] Also, AND is a two-input AND gate,
The input terminal has a tele switch (TELE) for zooming.
-SW) and wide switch (WIDE-SW) status signals are input. FF is an RS flip-flop, and its input terminal (low active) receives the output signal of the AND gate AND and the status signal of the camera's release switch (release SW).

Next, before entering into an explanation of the operation of the portion of the control circuit 24 according to the present invention, its outline will be described below.

[0107] The planetary gear 7 is connected to any one output gear 9a~
By stopping motor 1 while meshing with gear 9d, the subsequent gear train will not idle, and the mechanism to which the power is transmitted can be locked, which has the effect of stopping unnecessary movement. In this embodiment, as an example of this procedure, it is performed during normal photographing (when the main switch is turned on). In other words, when the main switch is turned on, the planet gear 7 remains engaged with the output gear 9c connected to the zoom drive gear 312, and the zooming operation is performed by only rotating the "Fw" and "Rw" of the motor 1. Then, when winding the film after release, the planetary gear 7 is engaged with the output gear 9d connected to the film feeding drive system to perform the winding operation, but after the release, the output gear 9c is engaged again.
and planetary gear 7 are meshed together.

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 in FIG.
The zoom lens barrel 316 is the one that moves when touched.
This is because it is a lens barrel 316. In this state, the lens barrel 31
4 is fixed by a bayonet ring 311 and therefore does not move.

Next, the zoom drive gear 31 during actual film feeding and zoom operation in such a gear lock.
The second gear lock will be explained using FIG. 19.

When the main switch is turned on, the planetary gear 7 is meshed with the output gear 9c connected to the zoom drive gear 312, and the zoom lens barrel 3 shown in FIG.
16 prevents it from moving due to external forces. Here, assume that the "Fw" rotation of the motor 1 (sun gear 6) is energizing in the telephoto direction of the zoom or in the film rewinding direction, and the "Rv" rotation is energizing in the wide direction or in the film winding direction. do.

Normally, the planetary gear 7 is meshed with the output gear 9c, and the zoom operation is performed by the rotation of the motor 1. In this case, when the zoom operation is completed, the tip 12c of the rotation stopper arm 12 abuts against the "Fw" side of the notch of the crown stopper 10, that is, the end surface 10a-1 shown in FIG. 19, and is stopped.

[0112] When the release operation is performed, the planetary gear 7 engages with the output gear 9d in the same revolution direction while performing the division destination selection operation in the "Rv" revolution, and also engages the output gear 9d in the same revolution direction. 12 hits the notch (end surface 10b-2) of the crown stopper 10, and then the "Rv" rotation of the planetary gear 7 is transmitted to the output gear 9d, and the film winding operation is performed via the film feeding planetary gear 304.

After the above film winding operation is completed, the planetary gear 7 rotates the output gear 9 while performing a division destination selection operation in order to prevent the output gear 9c that performs the zoom drive from idling.
c, and the rotation of the motor 1 is stopped at the time of this engagement. The movement at this time is that planetary gear 7 is "F"
When the end 12c of the rotation stopper arm 12 enters between the end surfaces 10a-1 and 10b-1 of the notch of the crown stopper 10, the motor 1 engages with the output gear 9c while rotating. Rotation must be stopped.

However, in this embodiment, the planetary gear 7
The pulse plate 14 and the photocoupler 17 are used to detect the revolution position of the robot and to detect the signal that determines the ON/OFF timing of the plunger 16 that regulates and cancels the revolution. As shown, planetary gear 7
The division destination selection operation by the revolution of the power transmission destination and the subsequent rotation operation of the power transmission destination must be performed continuously.

[0115] Then, the revolution of the planetary gear 7 has stopped, in other words, the tip 12c of the rotation stopper arm 12 has reached the end surfaces 10a-1 and 10d-1 of the notch of the crown stopper 10.
The rotation of the motor 1 must be stopped by predictive control. In this case, there are three cases depending on the timing at which the motor 1 stops.

1) At the same time as the revolution of the planetary gear 7 is stopped, the motor 1 is also stopped.

2) Even after the "Fw" revolution of the planetary gear 7 is stopped, the rotation of the motor 1 does not stop, causing the output gear 9c to rotate in the telephoto side drive direction ("Fw" rotation), causing the zoom −
The lens barrel 316 moves.

3) The rotation of the motor 1 stops before the revolution of the planetary gear 7 is stopped, and the tip 12c of the rotation stopper arm 12 comes off and rests on the stopper 11 (the state shown in FIG. 19). As a result, the planetary gear 7 becomes unable to revolve.

[0119] There is no problem in the case of 1) above, but
In the case of 2), the zoom lens barrel 31 is
6 moves, which is inconvenient for use. For this reason, it is necessary to stop the rotation of the motor 1 at the shortest timing possible, but then the above case 3) may occur. In the case of 3), the camera looks normal after the film has finished feeding, but when the zoom operation is performed afterwards,
a) In the case of telephoto direction drive, the planetary gear 7 revolves "Fw" until the tip 12c of the rotation stopper arm 12 enters the notch of the crown stopper 10, and then normal telephoto side drive operation can be performed.

b) In the case of wide-direction drive operation, the planetary gear 7 engages with the output gear 9d while making an "Rv" revolution, causing the output gear 9d to rotate in the film winding direction.

[0121] In the case b) above, the movement is not normal. As a countermeasure against this, in this embodiment, the following control is performed.

In other words, instead of stopping the rotation of the motor 1 at a timing that prevents the above case 2) from occurring after film feeding is completed, it is assumed that the worst case is the above case 3). When a direction drive signal is received, the motor 1 is rotated "Fw" for a short period of time, and the planetary gear 7 is rotated "Fw".
w'', the planetary gear 7 meshes with the output gear 9c, and the tip 12c of the rotation stopper arm 12 enters between the end surfaces 10a-1 and 10d-1 of the notch of the crown stopper 10, and the revolution is stopped. After doing so, the motor 1 is rotated "Rv" in the wide drive direction. In this case, the short time it takes for the motor 1 to rotate "Fw" means that the tip 12c of the rotation stopper arm 12 is in the notch of the crown stopper 10 (end faces 10a-1 and 10d-1) from the state shown in FIG.
1), the revolution of the planetary gear 7 changes to rotation, and the lens barrel 3, which is a zoom lens barrel,
The backlash of the gear trains up to 16 must be shorter than the timing at which the lens barrel 316 starts moving in the telephoto direction when it is shifted toward the telephoto drive direction.

[0123] In the case of a gear lock to the zoom mechanism as described above, that is, when the lens barrel 316 is in the middle position between the telephoto end and the wide end, it is necessary to prevent the lens barrel 316 from moving at this zoom position. Assuming that the revolution regulation (gear lock) of the planetary gear 7 is not performed normally when the gear lock is applied to the The reliability of the gear lock mechanism can be increased by controlling the rotation stopper arm 12 to enter the notch of the crown stopper 10 before starting power transmission (assuming that the gear is resting on the pull-out stopper 11). can improve sex.

[0124] In order to achieve the above, it is necessary to ``switch the power division destination from the zoom mechanism side, that is, from the output gear 9d to 9c after the film winding after the normal release operation is completed. It is necessary to determine that the wide-angle drive signal has arrived after the camera has moved (if the previous operation was the same zooming, there is no need to momentarily drive to the telephoto side), but it is necessary to know the previous operation state. The circuit portion for this purpose is an AND gate AND and an RS flip-flop FF shown in FIG.

[0125] That is, TELE-SW or WIDE-S
When W is turned on and a zooming operation is performed, the output of the AND gate AND is inverted to "L" level, the RS flip-flop FF is set, and its Q output ZM is "H".
set to level. Also, when the release operation is performed, the release SW is turned on, so the RS flip-flop F
F is set and its Q output ZM is reset to "L" level. Therefore, the output Z during wide zooming operation
Check M, and if it is “H” level, the previous operation will be canceled.
This means that it was a timing operation, and if it is at the "L" level, it can be determined that the previous operation was a normal release operation.

Next, the operation of the above-mentioned portion of the control circuit 24 will be explained with reference to the flowchart of FIG. This flow
The process proceeds by jumping to this point in the "WIDE zooming" operation portion of the main flow (not shown). "Step 221" Set the rotational direction M of the motor 1 to "Rv"
”. "Step 222" It is determined whether the previous operation was a zooming operation or a release operation based on the output ZM of the aforementioned RS flip-flop FF. As a result, “Z
M=H'', that is, if the previous operation was a zooming operation, the process advances to step 227. Also, if "ZM=L", that is, the previous operation was a release operation, step 2
Proceed to 23. "Step 223" In order to rotate the motor 1 "Fw", the rotation direction of the motor 1 is set to "M=Fw". "Step 224" Start an internal timer. "Step 225" The motor 1 is rotated "Fw" to cause the planetary gear 7 to revolve "Fw". "Step 226" Determine whether or not the timer has counted a certain period of time. If the timer has not finished counting, proceed to step 2.
Return to 25. After that, when it is determined that a certain period of time has passed, the planetary gear 7 meshes with the output gear 9c and the rotation stopper
The tip 12c of the ram 12 enters between the end faces 10a-1 and 10d-1 of the notch of the crown stopper 10, and the process proceeds to step 227 assuming that the revolution is stopped. "Step 227" Rotate "Rv" of motor 1 to perform WIDE zooming. “Step 228” Determine whether the lens barrel 316 has reached the WIDE end based on the state of a switch (not shown), and
If the IDE end has not been reached, the process advances to step 229; if it has, the process advances to step 230. "Step 229" WIDE-SW is ON or OFF
If it remains ON, the process returns to step 228. "Step 230" Here, when the WIDE end is reached or the desired WIDE zoom position is reached, the WIDE
- Assuming that the SW is turned off, the power supply to the motor 1 is stopped.

According to this embodiment, the lens barrel 316, which is a zoom lens barrel, is located between the telephoto end and the wide end, which can be freely operated by an external force, and the zoom lens barrel 316 is in this position. We tried to lock the gear to prevent it from moving, but as shown in Figure 19, assuming that the gear lock of the planetary gear 7 was not done properly, we tried to lock the gear before starting power transmission in the wide direction. Furthermore, since the rotation stopper arm 12 is controlled to always enter the notch of the crown stopper 10, the reliability of the gear lock mechanism can be improved. In other words, it is possible to prevent the film from being erroneously engaged with the film feeding output gear 9d and winding the film during the wide drive operation.

[0128]

[Effects of the Invention] As explained above, according to the present invention,
After the power transmission is completed, the power division control means is instructed to mesh the planetary gear with the output gear connected to the power transmission mechanism, which is inadvertently subjected to external force, and at the same time stop the power transmission to the output gear. and an instruction means for causing the planetary gear to mesh with the output gear again before starting power transmission to the output gear connected to the power transmission mechanism that is inadvertently subjected to the external force. When starting power transmission to the output gear connected to the power transmission mechanism that is inadvertently subjected to external force, the output gear is connected to the planetary gear again. The device is designed to perform an action that engages the two. As a result, even if the operation in which the output gear connected to the power transmission mechanism and the planetary gear are engaged with each other is not performed normally and is inadvertently subjected to an external force, which was performed according to the instruction from the instruction means, the same operation can be performed again. Since these operations are repeated, power transmission to the output gear is started after these gears are securely engaged. Therefore, it is possible to prevent a mechanism that may be inadvertently subjected to an external force from moving without permission, and furthermore, it is possible to perform the subsequent power transmission operation reliably.

[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 side view showing a state in which the planetary gear is 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. 4 is a diagram showing a plane and a side view of a state when switching to an area of FIG.

FIG. 7 is a plan view and a side view showing a state in which the planetary gear is located in the region X in an embodiment of the present invention.

FIG. 8 is a plan view and a side view of the planetary gear in a state immediately before it enters the region (■) in an embodiment of the present invention.

FIG. 9 is a plan view and a side view showing a state in which the planetary gear is located in the region (3) in an embodiment of the present invention.

FIG. 10 is a plan view and a side 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 according to an embodiment of the present invention.

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

18 is a flowchart showing an example of the operation of a portion of the control circuit 24 of FIG. 17 according to the present invention.

FIG. 19 is a plan view showing the configuration of main parts for explaining the main parts in an embodiment of the present invention.

FIG. 20 is a diagram illustrating a conventional general planetary gear mechanism.

FIG. 21 is a plan view showing a conventional planetary gear mechanism with two systems of power transmission.

FIG. 22 is a plan view showing a conventional planetary gear mechanism with four systems and four directions of power transmission.

FIG. 23 is a plan view showing a conventional planetary gear mechanism with four systems and eight directions of power transmission.

[Explanation of sign]

1 Motor 5 Rotating arm 6 Sun Gear 7 Planetary Gear 9a-9d Output gear 10 Crown stopper 11 Pull-out stopper 12 Rotation stopper arm 14 Pulse plate 15 Arm 16 Plunger 24 Control circuit 304 Planetary gear for film feeding 314 Lens barrel 315 Cam ring 316 Lens tube AND and gate FF RS flip-flop

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 maintains the meshing state between the meshed planetary gear and the output gear under control of the power division control means. In the power splitting device for a camera, which is equipped with a holding means for a camera, after the power transmission is completed, the planetary gear is meshed with the output gear connected to the power transmission mechanism, which is inadvertently subjected to external force, and at the same time the planetary gear is connected to the output gear. an instruction means for instructing the power division control means to stop power transmission to the power transmission mechanism; The power splitting device for a camera is further provided with meshing control means for causing the output gear to mesh with the planetary gear again.