JP2855588B2 - Power transmission device and camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for transmitting a driving force and an improvement of a camera .

[0002]

2. Description of the Related Art As shown in FIG. 20, a conventional general planetary gear mechanism has a sun gear 101 which rotates with a certain power and a sun gear 10 which rotates about the same shaft 108 as the sun gear 101.
The arm 102 which rotates independently of 1 and its arm 10
And a planetary gear 103 which is attached to the arm 102 by a shaft 107, rotates against the arm 102 by rotation with a spring 106 or the like, and meshes with the sun gear 101.

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

This planetary gear mechanism is generally used as a switching mechanism for transmitting power for winding and rewinding a film in a camera or the like. At this time, the planetary gear 10
The revolution range of No. 3 does not revolve 360 degrees as shown in FIG. 33, but is restricted by two gears, for example, a gear 104 for transmitting power to the hoisting system and a gear 105 for transmitting power to the rewinding system. Is done. However, actually, there is a possibility that the gears may bite each other.
The revolution of the planetary gear 103 is regulated by abutting the shaft 107 of the number 03 on the abutting portions 109 and 110. Thus, if the sun gear 101 rotates left, the planetary gear 1
03 meshes with the gear 105 to rotate the gear 105 to the left as indicated by the solid arrow, and conversely, when the sun gear 101 rotates to the right, the gear 104 rotates to the right as indicated by the broken arrow. It includes various state thereby generated below.

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

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

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

4) When the planetary gear 103 is switched to the gear 104 from the state where power is being transmitted to the gear 105 as in the state of FIG. 21 , there is no backlash immediately after the right rotation of the sun gear 101 is started. The planetary gear 103 rotates only (rotates to the left) until the tension generated on the teeth and the tooth surface is removed and the force F-109 disappears, and the planetary gear starts revolving later. Above 2) The reason is two systems as a force as, a) a conventional planetary gear mechanism planetary gear 103 as in FIG. 21
Is restricted by the gears 104 and 105, the planetary gear 103 cannot mesh with any part other than the gears 104 and 105.

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

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

On the other hand, a planetary gear mechanism as shown in FIG. 22 is conceivable in order to obtain a power transmission number larger than two systems. In this mechanism, a plurality of gears 111a to 111d are arranged on the circumference (four in this example), and the sun gear 10 is arranged so as not to hinder the revolution of the planetary gear 103.
1, the same positional relationship as the planetary gear 103 and the same straight line. Each of the gears 111a to 111d has a planetary gear 1
Stoppers 112a-11 for preventing leftward revolution of 03
2d is arranged so as to be able to advance and retreat, whereby the gear 111 meshes with the planetary gear 103 when the sun gear 101 rotates clockwise.
a to 111d are selected, and the stoppers 112a to 112d and the shaft 107 abut by the left rotation of the sun gear 101,
The force is transmitted to each of the gears 111a to 111d. However, this only solves the above problem a), and the problem b) remains as it is. That is, the force transmission direction of the gears 111a to 111d is only one direction as shown in FIG. 22, and the force cannot be transmitted to the reverse rotation.

The gears 111a to 111d as shown in FIG.
Even if there are four gear trains and four gear trains ahead, the transmitted force is only in one direction, so there is a problem that it is difficult to use it for a mechanism requiring both left and right rotations. for that reason,
If there is a planetary gear mechanism that can transmit the power of both left and right rotation with one gear train, the sun gear can be rotated from one power and the power can be selectively transmitted to multiple gear trains by left and right rotation. become.

FIG. 23 shows a model diagram of the basic idea.

In this figure, the rotation of the planetary gear 103 is stopped by stoppers 113a to 113d and 114a to 114d so that the left and right rotation of the planetary gear 103 can be stopped. The power can be transmitted.

FIG. 23 shows a state where the driving force of the left rotation of the sun gear 101 is transmitted to the gear 111a. However, in this state, the other gears 111b to 111b
Since 1d does not mesh with the planetary gear 103, there is nothing that restricts the rotation of these gears. For this reason, among the gears 111b to 111d, for example, the mechanism to which the power is transmitted to the gear 111c is likely to receive an external force carelessly.
For example, in the case of a variable focal length mechanism in a camera, there is an inconvenience that the mechanism moves on its own if any external force is applied to the mechanism from outside the camera. Of course, if the mechanism to which the power is transmitted to the gear 111a is likely to receive an external force carelessly, the same problem will 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 a gear connected to a mechanism which is likely to receive an external force carelessly, and this state is maintained. Can be considered. However, when the planetary gear 103 is selectively meshed, there are the following problems.

[0017]

In FIG. 23, stoppers 113a to 113d and 114a to 114d lock the revolution of the planetary gear 103 as described above.
It is configured to be able to move forward and backward with respect to the planetary gear 103 and the shaft 107. Here, each of the stoppers 113a to 113d, 1
14a~114d is in the retracted state, the planetary gear 103 as in the case planetary gear 103 is capable revolution, for example, FIG. 23
Consider the case where the revolution of the planetary gear 103 is stopped in a state where the gear 111a and the gear 111a are engaged with each other to prevent the mechanism connected to the gear 111a from idling.

At this time, the planetary gear 103 is
It is also conceivable that the revolution stops in a state where it does not reliably engage with the vehicle. Thus, the planetary gear 103 has the gear 111a
The planetary gear 10 is not engaged with the planetary gear 10
When the transmission of the driving force in the direction opposite to the direction of engagement with the gear 111a from the gear 3 is started, the planetary gear 103 no longer revolves in the direction of engagement with the gear 111a. Occurs.

[0019]

[0020]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power transmission device and a camera capable of reliably performing a power transmission operation.

[0022]

To achieve the above object of the Invention The present invention according to claim 1, in conjunction with the first rotating portion for transmitting a driving force by rotation, the rotation of the first rotating part a second rotating portion, the driving force from the first rotary part engages by the second rotating part is revolved is transmitted to revolve around the rotation portion of the rotation and the first and And the second rotating portion revolves and moves to the power transmitting portion.
By reaching the position for transmitting the force, the second rotating part becomes public.
Regulation means for regulating the revolution in the direction opposite to the direction in which it turned
When the first rotating portion is rotated in a first direction by revolving the second rotating part, the rotating portion of the second said regulating means
Predicting that it has reached the orbital position regulated by
After the rotation of the first direction of the rotating part stops, 該停
From the stopped state to the power transmission section before the first rotating section.
The transmission of the driving force of the rotation in the second direction different from the first direction.
When starting us, driving force of the first rotating portion is rotated in the second direction after rotating in the first direction, rotation of the second direction of the first rotating part And a control means for transmitting the power to the power transmission unit. Further, the present invention according to claim 2 provides a
A first rotating part for transmitting a driving force, and the first rotating part
Revolves around the first rotating part and its rotation in conjunction with the rotation of
A second rotating part, and the second rotating part revolves.
And the driving force from the first rotating portion is transmitted.
Power transmission unit and the second rotating unit
The second position is reached by reaching the position for transmitting power to the force transmission unit.
Restricts the revolution in the direction opposite to the direction in which the rotating part of
Regulating means for rotating the first rotating portion in a first direction.
And revolves the second rotating part so that the second rotating part
Predict that it has reached the orbital position regulated by the
To stop the rotation of the first rotating part in the first direction.
Then, from the stopped state to the power transmission unit, the first
Rotation of the rotating portion in a second direction different from the first direction.
When starting transmission of the driving force, the first rotating portion is
After rotating in the first direction, rotating in the second direction,
The driving force of the rotation of the first rotating portion in the second direction
A camera having control means for transmitting power to the power transmission unit;
Is what you do.

[0023]

[0024]

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

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

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

The output gear 9a is a lens barrel 31 holding a lens driving mechanism such as a lens barrel 316 and a cam ring 315.
The helicoid gear 310 for feeding and collapsing of No. 4 is rotated by a gear train 310a not shown in the figure.

The output gear 9 b is connected to the barrel 31 that is being extended.
The bayonet ring 311 is fixed to the main body 317 so as not to be collapsed, and is rotated by a gear train 311a (not shown).

The output gear 9c is a zoom drive gear 312 for moving the cam ring 315 in the lens barrel 314 to perform zooming.
Is rotated by a gear train 312a not shown in the figure.

The output gear 9d meshes with the film feed planetary gear 304 via the arm 309, and constitutes a film feed planetary gear mechanism with the output gear 9d. It is gear. The fork (not shown) is caused by the left or right rotation of the output gear 9d .
Shown) or spool - will be selectively rotated Le 305, film patrol - winding or film of the film F than Ne within 313 patrol - Ne 313 in return f of the winding is performed.

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

As shown in FIGS. 1 and 3, output gears 9a to 9d to which power is transmitted next to the planetary gear 7 are arranged on the circumference so that the planetary gear 7 can revolve 360 degrees.
In this embodiment, four output gears are used. However, the number of output gears need not be four, but may be two or more.

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

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

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

The rotating arm 5 has several upright bent portions, and a hole is formed in the upright bent portion 5a therein.
A rotation stopping arm 12 arranged above the rotating arm 5.
Also, holes 12b are formed, and the rotation stopping arm 12 is rotatably stopped with respect to the rotating arm 5 by a rotating arm shaft 13a inserted into these holes. As a result, the rotation stopping arm 12 can rotate about the rotation arm shaft 13a, and the rotation is performed in a state where the rotation range is almost horizontal, so that the tip 12c moves up and down. A hole 12a is formed in the rotation stopping arm 12.
Are formed, and the above-mentioned planetary shaft 8a penetrates through the hole 12a (the state of FIG. 2). In this state, since the hole 12a is an elongated hole, there is no restriction on the vertical rotation of the detent arm 12 (in other words, the vertical movement of the tip 12c), but the hole 12a is integral with the planet shaft 8a. The rotating arm 5 rotates horizontally in conjunction with the horizontal rotation of the rotating arm 5. And a rotating arm shaft 13a.
, A torsion spring 13b passes therethrough and urges the tip 12c of the rotation stopping arm 12 upward.

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

An arm 15 is arranged above the pulse plate 14, and is rotatably stopped by an arm shaft 15b. The arm shaft 15b is fixed by a main plate (not shown). The arm shaft 15b is also provided with a torsion spring 15c similar to the above-described rotation stopping arm 12, and its urging direction is such that one end 15a of the arm is in FIG. 1 and FIG. The force is directed downward. A projection 15e is fixed to one end 15a of the arm, and passes through a large hole 14c provided in the pulse plate 14 to urge the central portion 12d of the rotation stopping arm 12 downward.

The other end 15d of the arm 15 has a plunger 1
6 movable yokes 16a are arranged, and the plunger 1
When the movable yoke 16a is energized and the movable yoke 16a is sucked downward in FIGS. 1 and 2, the projection 15e moves upward in the drawings. The strength of the spring balance of the torsion springs 13b and 15c is set so that the vertical movement of the rotation stopping arm 12 is linked to the movement of the projection 15e of the arm 15.

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

The horizontal rotation center of the rotation stopping arm 12 that rotates further in conjunction with the rotating arm 5 that rotates horizontally in association with the revolution of the planetary gear 7 is the output shaft 3, that is, the sun gear 6. (Per 12d in FIG. 1). No matter what position the planetary gear 7 revolves, the center (12d) of the rotation stopping arm 12 is the center of rotation.
Regardless of the position of the rotation stop arm 12 in conjunction with the sun gear 6, the planetary gear 7, the rotation arm 5, and the like (for example, the state of each (a) in FIGS. 5 to 9), Under the same conditions there (12
d) can be pushed by the projection 15e of the arm 15, and the tip 12c of the rotation stopping arm 12 can be moved up and down. For this reason, the revolution of the planetary gear 7 is stopped and the output gear 9 is stopped.
The operation for inserting the tip 12c of the detent arm 12 into the notch of the crown stopper 10 in order to transmit power to a to 9d is performed by the protrusion 15e of the arm 15 when the detent arm 12 is rotated. A simple mechanism that only urges the center (12d) is sufficient regardless of the above.

Immediately above the output gears 9a to 9d, that is, between the rotating arm 5 and the rotation stopping arm 12, a crown stopper 10 and a pull-out stopper 11 are fixed in a state of overlapping with a base plate (not shown). . Each of the stoppers 10 and 11 is provided with a notch, and has such a shape that the tip 12c of the rotation stopping arm 12 can pass through the notch.

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

2) When the plunger 16 is not suctioning, the projection 15e provided on the arm 15 urges the rotation-stopping arm 12 downward so that the notch end face 10a of the crown stopper 10 is cut. And 10b come to the height of the tip 12c of the rotation stopping arm (the state of FIG. 2).

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

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

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

The crown stopper 10 is formed with a vertical bent portion 10c. The vertical bent portion 10c makes it impossible for the planetary gear 7 to revolve freely over 360 degrees, so that the planetary gear 7 only revolves for one left and right rotation. That is, the plunger 16
The tip 12c of the detent arm 12 is positioned above the crown stopper 10 and the pull-out stopper 11 (the state of FIG. 6 described later) by the suction of The bent portion 10c is a rotation stopping arm 1.
Since it serves as a stopper for the second tip 12c, the revolution is stopped. This is the state shown in FIG. 5 or FIG. However, in this position, since the upright bent portion 10c functions as a stopper, the planetary gear 7 starts to rotate.
The upright bent portion 10c is provided at a place where the planetary gear 7 does not mesh with any of the output gears 9a to 9d.

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

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

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

As shown in FIG. 5 (a), the direction of rotation of the sun gear 6 is "Rv" in the clockwise direction and "Fw" in the counterclockwise direction. 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 rotating arm 5 and the rotation stopping arm 12, and the direction of rotation of the motor 1. Further, the revolving area of the planetary gear 7 is represented by X and the numerals. This is the same as indicating the position of the tip 12c of the rotation stopping arm 12 with respect to the crown stopper 10. X is an area including the “initial position 10d” that does not mesh with any of the output gears 9a to 9d.

,, Indicate planetary gear 7 and output gear 9
a to 9b are engaged with each other, and this area (position) is detected by detecting the amount of change of the “bright” and “dark” pulses of the pulse plate 14 from the output of the photocoupler 17, and thereby a control circuit 24 (see FIG. ). That is, the planetary gears 7 are shifted in the order of →→→ (FIG. 5 (a) → FIG. 6 (a) →
7A) and Rv revolution, the photocoupler 17
Detects the light and dark patterns of the pulse plate 14 to output light and dark signals as shown in FIG. 11, whereby the planetary gear 7 is located in the region However, it can be seen that it is in a state of meshing with any of the output gears 9a to 9b.
, The output gear 9a in this case.
It can be seen that all the gears are not meshed with each other.

Incidentally, the planetary gear 7 is provided with the crown stopper 1.
0 bending part 10c and the tip 12c of the detent arm 12.
As described above, it is not possible to revolve in the region from X to the region from to X.

In order to revolve the planetary gear 7, the plunger 16 is energized, and when the planetary gear 7 is revolved afterwards, if the energization of the plunger 16 is stopped when the planetary gear 7 is in one of the regions,. Tip 12 of the program 12
c is in a state of riding on the stopper 11 (the state of FIG. 8).

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

As described above, the planetary gear 7 has any output gear 9a to 9g.
By providing an "initial position" that can rotate without engaging with 9d and revolving, the present apparatus can be stably stopped.

Here, the basic operation of the power split device according to the present embodiment is described as follows: “A planetary gear 7 revolving around the sun gear 6 revolves around an arbitrary output gear that surrounds the circumference thereof. The revolving motion is stopped at 9a to 9d, and the rotation of the sun gear 6 is transmitted to the output gears 9a to 9d only by rotating itself. "The outline of the series of operations will be described below.

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

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

Next, "initial position setting" will be described.

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

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

At this time, it is important that the upright bent portion 10c of the crown stopper 10 and the anti-rotation arm 12 also serve as abutting portions for both left and right revolution control when the planetary gear 7 revolves.
Of the planetary gear 7 does not mesh with any of the output gears 9a to 9d as described above (the state of FIGS. 5A and 7A).

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

Therefore, in the first half of the operation of “initial position setting”, after the energization of the plunger 16, the pulse change is not detected, that is, the planetary gear 7 is rotated in the Fw direction to rotate the planetary gear 7 in the region (the state in FIG. ), That is, until it hits in the Fw revolution. At this time, the rotation time of the motor 1 takes a time (for example, "500 msec") sufficient for the planetary gear 7 to make one revolution to X or X, and the motor 1 is simply turned off. The condition is that the tip 12c of the rotation stopping arm 12 is abutted against the upright bent portion 10c of the crown stopper 10 by rotating Fw under the condition. However, as described in the "moving operation" described later, there are cases where the planetary gear 7 cannot freely revolve without first performing the Rv revolution depending on conditions. After the motor 1 is rotated by Rv for a predetermined time, the planetary gear 7 is revolved Rv to the position of X (the state of FIG. 7A), and then the planetary gear 7 is brought into contact with the planetary gear 7 by revolving Fw.

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

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

As described above, the 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 abutment position of the revolution of the planetary gear 7.
By setting this as a neutral point (neutral position) where the planetary gear 7 can revolve without revolving, even when the revolving position cannot be detected, especially when the revolving position cannot be detected, the motor 1 is rotated for a certain period of time. Neutral position (neutral position, especially the initial position 10d of the crown stopper 10), which can be rotated at the abutting position without engaging with the gears 9a to 9d and becomes the abutting position without inadvertently transmitting power. You can look for.

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

The "initial position setting" operation includes the planetary gear 7
However, since it also includes an operation of confirming whether or not the orbit can be surely revolved to each area in the order of →→→→→→→→ X, the apparatus has a function of checking whether or not the present apparatus operates normally. That is, if the planetary gear 7 can make one revolution (Rv revolution here) as described above, four pulse changes from “bright” to “dark” and “dark” to “bright” as shown in FIG. 11 are detected. Therefore, if these four pulse changes are not detected, it means that the planetary gear 7 has not normally revolved, indicating that the mechanism of the power split device is defective.

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

In addition to the "initial position setting" operation at the time of startup of the present apparatus (which also checks whether or not the planetary gear 7 can reliably revolve in each area between X and-), the "initial position setting" Out operation. That is, the mechanisms 25a to 25d (see FIG. 17) that transmit power are provided with circuit portions for generating drive signals 26a to 25d (see FIG. 17) for feedback of their movements. Each of the output gears 9a to 9d has a mechanism 25a to
When the power is transmitted to 25d, the drive signal 26a
When the drive signal 26a to 26d is not received from the mechanism 25a to 25d that does not need to transmit the power, etc. , You can redo the selection.

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

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

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

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

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

First, the "missing operation" will be described.

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

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

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

That is, if the “Rv” rotation of the planetary gear 7 continues, the tip 12c of the rotation stopping arm 12 and the notch (end face 10a) of the crown stopper 10 are always in a state of abutting. In addition, even if the rotation of the planetary gear 7, that is, the rotation of the motor 1 is stopped, tension is generated on the teeth and the tooth surface without backlash of the gear train. This is because the front end 12c of the horn 12 is biased toward the notch 10a of the crown stopper.

Therefore, after the plunger 16 is sucked, the motor 1 is once rotated in the reverse direction “Rv” to remove the tension generated on the teeth and the tooth surface in the absence of backlash, and the tip 12 c of the rotation stopping arm 12 is removed. The friction between the notch (end face 10a) of the crown stopper 10 and the notch (end face 10a) of the crown stopper 10 must be removed, and when the friction has been eliminated, the crown stopper 10 must be removed from the notch (end face 10a). However, the frictional force varies greatly, and the strength of the torsion spring 13b for lifting the rotation stopping arm 12 is also generally determined by the spring balance of the attraction force of the arm torsion spring 15c and the plunger 16. Can not be set strongly. As a countermeasure, a stopper 11 is used. In other words, even if the protrusion 15e attached to the arm 15 is raised by the removal stopper 11, and the rotation stopping arm 12 is not pushed downward, the contact between the notch (the end face 10a) and the tip 12c is completely eliminated. Until the friction stops, the tip 12c of the rotation stopping arm 12 is pulled out and caught on the stopper 11 (FIG. 9).
(A) and FIGS. 10 (a) and 10 (b)).

The above operation will be described with reference to FIG.

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

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

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

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

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

By providing the removal stopper 11 in this manner, the spring balance of the apparatus, the characteristics of the plunger 16, the crown stopper 10, the rotation stopping arm 12
It is not necessary to strictly control the amount of tension generated on the teeth and tooth surfaces in the absence of frictional changes and backlash due to the part shape of the parts, and it is possible to reliably perform the switching operation after power transmission Become.

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

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

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

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

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

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

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

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

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

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

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

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

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

AND is a two-input AND gate.
The input terminal has a zoom teleswitch (TELE).
-SW) and a state signal of the wide switch (WIDE-SW). The FF is an RS flip-flop, and its input terminal (low active) receives the output signal of the AND gate AND and the state signal of the release switch (release SW) of the camera.

Next, before the operation of the control circuit 24 according to the present invention is described, its outline is described below.

The planetary gear 7 is connected to any one of the output gears 9a to 9a.
By stopping the motor 1 while meshing with the gear 9d, the preceding gear train does not run idle, and the mechanism of the power transmission destination can be locked, so that unnecessary movement can be stopped. In this embodiment, as an example of this processing, the processing is performed at the time of normal photographing (when the main switch is ON). That is, when the main switch is ON,
Planetary gear 7 to output gear 9c connected to
Are kept engaged, the zooming operation is performed only by rotating "Fw" and "Rw" of the motor 1, and when the film is wound after the release, the planetary gear 7 is temporarily wound for the winding operation. Output gear 9d connected to the feed drive system
And wind up, but after the end, the output gear 9
c and the planetary gear 7 are engaged with each other.

The reason why such an operation is necessary is that when the main switch is turned on, each of the mechanical parts of the camera can be inadvertently touched by the lens barrel 314 in FIG.
The lens barrel 316 is moved by touching it.
This is because the lens barrel 316 is used. In this state, the lens barrel 31
4 does not move because it is fixed by the bayonet ring 311.

Next, the actual film feeding in such a gear lock and the zoom drive gear 31 when the zoom operation is used.
The gear lock 2 will be described with reference to FIG.

When the main switch is ON, the planetary gear 7 is engaged with the output gear 9c connected to the zoom drive gear 312, and the zoom lens barrel 3 shown in FIG.
16 is prevented from moving by an external force. Here, it is assumed that the "Fw" rotation of the motor 1 (sun gear 6) is in the telephoto energization or film rewind direction of the zoom, and the "Rv" rotation is in the wide energization or film winding direction. I do.

Normally, the planetary gear 7 meshes with the output gear 9c and performs a zoom operation by the rotation of the motor 1. For example, the zoom driving method is controlled by energizing the tele-side one side. In this case, at the end of the zooming operation, the tip 12c of the rotation stopping arm 12 is located on the "Fw" side of the notch of the crown stopper 10, that is, the end face 10a-1 shown in FIG.
And stopped.

When the release operation is performed, the planetary gear 7 meshes with the output gear 9d in the same revolving direction while performing the division destination selecting operation in the "Rv" revolution.
The rotation stopping arm 12 abuts against the notch (end face 10b-2) of the crown stopper 10, and thereafter 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-described film winding operation is completed, the planetary gear 7 engages with the output gear 9c while performing a division destination selecting operation in order to prevent the output gear 9c that performs zoom driving from running idle. At this point, the rotation of the motor 1 is stopped. At this time, the planetary gear 7 meshes with the output gear 9c while revolving "Fw", and the tip 12c of the rotation stopping arm 12 is
The rotation of the motor 1 must be stopped at the point when it enters between the end faces 10a-1 and 10b-1 of the 0 notch.

However, in this embodiment, the planetary gear 7
Since the detection of the revolving position and the detection of the signals for turning ON and OFF the plunger 16 for restricting and canceling the revolving are both performed by the pulse plate 14 and the photocoupler 17, the operation will be described in “ON operation”. As you can see, planetary gear 7
Must be continuously performed for the division destination selection operation and the subsequent rotation operation of the power transmission destination.

Then, the revolution of the planetary gear 7 has stopped, in other words, the tip 12c of the rotation stopping arm 12 has the notched end faces 10a-1 and 10b -of the crown stopper 10.
The rotation of the motor 1 must be stopped by predicting and controlling that the motor 1 has entered. In this case, there are three cases depending on the stop timing of the motor 1.

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

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

3) The state where the rotation of the motor 1 is stopped before the revolution of the planetary gear 7 is stopped, and the tip 12c of the rotation stopping arm 12 comes off and rides on the stopper 11 (the state shown in FIG. 19). As a result, the planetary gear 7 cannot revolve.

In case 1) above, there is no problem.
In the case of 2), the zoom lens barrel 31 is provided for each film winding operation.
6 moves, which is inconvenient for use. For this reason, the rotation of the motor 1 must be stopped at a timing as short as possible. However, the case 3) may occur. In the case of 3), although the appearance of the camera is normal after the end of the film feeding, the zoom operation is performed thereafter. A) In the case of the tele-direction drive, the planetary gear 7 is turned to the tip 12c of the rotation stopping arm 12. Revolves around "Fw" until the motor enters the notch of the crown stopper 10, after which a normal tele-side driving operation can be performed.

B) In the case of the wide-direction driving operation, the planetary gear 7 meshes with the output gear 9d while revolving "Rv", and rotates the output gear 9d in the film winding direction as it is.

In the case of b), the movement is not normal.
In this embodiment, the following control is performed as a countermeasure.

That is, after the film feeding is completed, the above 2)
Instead of stopping the rotation of the motor 1 at a timing such that the case does not occur, it is assumed that the worst case is the case 3). By rotating the motor 1 by "Fw", the planetary gear 7 revolves by "Fw". The planetary gear 7 meshes with the output gear 9c, and the tip 12c of the rotation stopping arm 12 has the notched end face of the crown stopper 10. After entering between 10a-1 and 10b -1 to stop the revolution, the motor 1 is rotated "Rv" in the wide drive direction. In this case, the short time for rotating the motor 1 by "Fw" refers to the tip 12c of the rotation stopping arm 12 from the state shown in FIG.
Are notches in the crown stopper 10 (end faces 10a-1 and 10a- 1).
0b -1) longer than the timing of entering the planetary gear 7
Of the gear train up to the lens barrel 316, which is a zoom lens barrel, must be shorter than the timing at which the lens barrel 316 starts moving in the telephoto direction due to the bias in the teledrive direction.

As described above, in the case of a gear lock to the zoom mechanism, that is, the lens barrel 316 is at the middle position between the telephoto end and the wide end, for example, so that the lens barrel 316 is not moved in this zoom position. Assuming that the revolution control (gear lock) of the planetary gear 7 is not normally performed when the gear lock operation is performed (see FIG. 19, the tip 12c of the rotation stop arm 12 is By assuming that the rotation stopper arm 12 is inserted into the notch of the crown stopper 10 before power transmission is started, the reliability of the gear lock mechanism is ensured. Performance can be improved.

Further, in order to achieve the above, it is necessary that "after the film winding after the normal release operation is completed, the power split destination is switched to the zoom mechanism side, that is, from the output gear 9d to 9c. After that, it is necessary to determine that a signal for driving in the wide direction has arrived (when the previous operation is the same zooming, it is not necessary to drive to the tele side for a moment). The circuit part to be closed is the AND gate AND and the RS flip-flop FF shown in FIG.

That is, TELE-SW or WIDE-S
When W is turned on and the zooming operation is performed, the output of the AND gate AND is inverted to "L" level, the RS flip-flop FF is set, and the Q output ZM is "H".
Set to level. When the release operation is performed, the release SW is turned on.
F is set, and its Q output ZM is reset to "L" level. Therefore, during wide zooming operation, the output Z
M is checked, and if "H" level, the previous operation is shifted.
It is determined that the previous operation was a normal release operation if the operation was "L" level.

Next, the operation of the control circuit 24 in the above-described portion will be described with reference to the flowchart of FIG. This flow is based on “WIDE-
In the "Ming" operation part, the process proceeds by jumping here. "Step 221" The rotation direction M of the motor 1 is set 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 RS flip-flop FF. As a result, if "ZM = H", that is, if the previous operation was a zooming operation, the flow proceeds to step 227. Also,
If "ZM = L", that is, if the previous operation was a release operation, the flow proceeds to step 223. "Step 223"
To rotate the motor 1 by "Fw", the rotation direction of the motor 1 is set to "M = Fw". "Step 224"
Start the internal timer. "Step 225" The motor 1 is rotated "Fw" to revolve the planetary gear 7 "Fw". "Step 226" It is determined whether or not the timer has counted a predetermined time. If the timer has not been counted, the process returns to step 225. Thereafter, when it is determined that a predetermined time has elapsed, the planetary gear 7 meshes with the output gear 9c, and the tip 12c of the detent arm 12 enters between the notched end faces 10a-1 and 10b -1 of the crown stopper 10, and The process proceeds to step 227 assuming that the revolution has been stopped. "Step 227" The motor 1 is rotated "Rv" to perform WIDE zooming. "Step 228"
It is determined from the state of a switch (not shown) whether the lens barrel 316 has reached the WIDE end, and if it has not reached the WIDE end, the process proceeds to step 229;
Proceed to 30. "Step 229" WIDE-SW is O
Determine whether it is N or OFF, and if it remains ON, step 2
Return to 28. [Step 230] Here, it is assumed that the WIDE end has been reached or the desired WIDE zoom position has been reached and the WIDE-SW has been turned off, and the power supply to the motor 1 is stopped.

According to the present embodiment, the lens barrel 316, which is a zoom lens barrel, is between the telephoto end and the wide end that can be freely operated by an external force, and the zoom lens barrel 316 is moved in this position. The gear locking operation was performed to prevent the gear from moving. However, as shown in FIG. 19, assuming that the gear locking of the planetary gear 7 was not performed normally, before starting the power transmission in the wide direction. to, be sure rotation stopping a - because the arm 12 is in the manner performs control so as to enter into the cutout of the crown stopper 10, it is possible to improve the reliability of the gear lock mechanism. In other words, it is possible to prevent the film from being erroneously engaged with the film feeding output gear 9d during the wide drive operation and the film being wound.

[0128] In the embodiment described above (corresponding INVENTION Example), the first rotary portion of the sun gear 6 is the invention, the second rotating portion of the planetary gear 7 is the invention, the output gear 9c is present Departure
The power transmission portion of the light, the cutout of the crown stopper 10 Kinotan
The surface 10b-1 corresponds to the regulating means of the present invention, and corresponds to the step shown in FIG.
The control circuit 24 that executes steps 220 to 227 corresponds to the control means of the present invention .

As described above, according to the present invention, it is possible to provide a power transmission device and a camera capable of reliably performing a power transmission operation.

[Brief description of the drawings]

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

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

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

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

FIG. 5 is a view showing a plane and a side surface in a state where a planetary gear is located in a region according to an embodiment of the present invention;

FIG. 6 is a diagram showing a plane and a side surface in a state when the planetary gear is switched to the empty region in one embodiment of the present invention.

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

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

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

FIG. 10 is a diagram showing a plane and a side surface in a state immediately before the planetary gear comes out of an area in one embodiment of the present invention.

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

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

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

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

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

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

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

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

FIG. 19 is a plan view showing a main part configuration for describing a main part in one 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 having two systems of power transmission.

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

FIG. 23 is a plan view showing a conventional planetary gear mechanism in which power is transmitted in four directions and eight directions.

[Description of sign]

 REFERENCE SIGNS LIST 1 motor 5 rotating arm 6 sun gear 7 planetary gear 9 a to 9 d output gear 10 crown stopper 11 pull-out stopper 12 rotation stopping arm 14 pulse plate 15 arm 16 plunger 24 control circuit 304 planet for film feeding Gear 314 Lens tube 315 Cam ring 316 Lens tube AND AND gate FF RS flip-flop

Claims (2)

(57) [Claims] And 1. A first rotating portion for transmitting a driving force by rotation, a second rotating part which revolves the first around the rotation portion of the rotation and the first in conjunction with the rotation of the rotating part the second
A power transmitting unit that is engaged by the rotation of the rotating unit and revolves to transmit the driving force from the first rotating unit ;
The position where the rotating part revolves and transmits power to the power transmission part
And the direction in which the second rotating part has revolved.
Means for regulating the revolution in the reverse direction, and rotating the first rotating part in the first direction to revolve the second rotating part.
The second rotating part is restricted by the restricting means.
And that the first rotating portion
After the rotation direction is stopped, the case that from the state that the stop
The power transmission unit is different from the first direction of the first rotating unit.
When starting transmission of the driving force for the rotation in the second direction,
After rotating the first rotating part in the first direction,
Rotate the second direction, the power transmission apparatus characterized by a control means for transmitting the driving force of the rotation of the second direction of the first rotating part in the power transmission unit. 2. A first rotation for transmitting a driving force by rotation.
Part and the rotation and the second part in conjunction with the rotation of the first rotating part.
A second rotating part that revolves around the first rotating part;
The first rotating part is engaged by revolving the rotating part of the first rotating part.
A power transmission unit to which a driving force from the unit is transmitted;
The position where the rotating part revolves and transmits power to the power transmission part
And the direction in which the second rotating part has revolved.
Means for regulating the revolution in the reverse direction, and said first rotation
The second rotating part revolves by rotating the part in a first direction.
The second rotating part is restricted by the restricting means.
And that the first rotating portion
After stopping the rotation in the direction of
The power transmission unit is different from the first direction of the first rotating unit.
When starting transmission of the driving force for the rotation in the second direction,
After rotating the first rotating part in the first direction,
Rotated in a second direction, the second rotation of the first rotating part
Control for transmitting the driving force of the rotation in the direction to the power transmission unit
And a camera.