JPH10184847A - Power split device - Google Patents

Abstract

(57) [Problem] To provide a small and inexpensive power split device. SOLUTION: When a planetary gear transmits driving force to one of output gears, a regulating means for regulating the revolution of the planetary gear to determine the position of the planetary gear, and a holding means for holding the position of the regulating means. And urging means for urging the holding means to release the holding means.When the holding of the regulating means is released in accordance with the urging force of the urging means, when returning to the holding position by the holding means again, A power split device having charging means for moving the regulating means against the urging force of the urging means;

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power split device, and more particularly, to a sun gear driven by a drive motor, a planetary gear revolving around the sun gear, and a plurality of outputs respectively connected to a power transmission mechanism. The present invention relates to an improvement of a power split device such as a camera including a gear and a power split control unit that meshes the planetary gear with an output gear and selectively transmits a driving force of the sun gear to the output gear.

[0002]

2. Description of the Related Art Hitherto, various power split mechanisms for cameras and the like have been proposed. Hereinafter, technical means disclosed in Japanese Patent Application Laid-Open No. 4-258930 will be described as an example of the power split mechanism.

FIG. 18 is a front view showing a main part of a power split mechanism in the technical means disclosed in Japanese Patent Application Laid-Open No. 4-258930.

[0004] As shown in FIG.
11a to 111d are arranged on the circumference, and the planetary gear 103
Gear 101 and the planetary gear 1 so as not to hinder the revolution of
03 and a positional relationship on the same straight line. This allows
More than two power transmission numbers have been obtained. Further, stoppers 113a to 113d and 114a to 114d for preventing the planetary gear from revolving are provided, and the stoppers 113a to 113d prevent the planetary gear 103 from revolving in conjunction with the plunger.
Stopping at 113d and 114a to 114d restricts the revolution of the planetary gear 103 in both clockwise and counterclockwise directions. Then, a force is transmitted to each of the gears 111a to 111d.

[0005]

However, the technical means disclosed in Japanese Patent Application Laid-Open No. 4-258930 shown in FIG. 18 requires a solenoid-type plunger capable of suction as a drive source for driving the stopper. Therefore, a large plunger that generates a large force is required, so that a large space is required and the cost is increased.

A first object of the present invention is to provide a small and inexpensive power split device.

A second object of the present invention is to provide a power split device capable of reliably switching planetary gears while achieving power saving.

A third object of the present invention is to provide an inexpensive power split device with a reduced number of parts by simplifying the mechanism.

A fourth object of the present invention is to provide a power split device having a high transmission efficiency by reducing a load during rotation transmission.

A fifth object of the present invention is to provide a power split device which is small and has high transmission efficiency by reducing a load during rotation transmission and not providing an internal gear.

[0011]

According to the first aspect of the present invention, there is provided a sun gear driven by a drive motor and a planetary gear revolving around the sun gear. A power splitter having a plurality of output gears coupled to a power transmission mechanism, and power split control means for meshing the planetary gear with the output gear and selectively transmitting the driving force of the sun gear to the output gear; In the splitting device, when the planetary gear transmits driving force to one of the output gears, a restricting unit that restricts the revolution of the planetary gear to determine the position of the planetary gear, and holds the position of the restricting unit. Holding means, and urging means for urging the holding means to release the holding means, and after the holding of the regulating means is released in accordance with the urging force of the urging means, return to the holding position by the holding means again At the time, Braking means characterized by comprising a charge means for moving against the biasing force of the biasing means.

Thus, when transmitting the driving force of the drive motor to the output gear, the restricting means locks the revolution of the planetary gear, and the position of the planetary gear is held at an appropriate position in meshing with the output gear. Also, without using a large plunger having a suction force, the rotation restriction of the planetary gear can be released, and after the restricting means moves in accordance with the urging force of the urging means, the position of the restricting means can be controlled again. The urging means is charged by the function of the means, and the driving force of the motor can be selectively transmitted to a plurality of operating parts provided in a camera or the like as appropriate.

In order to achieve the second object, the present invention according to the second aspect is characterized in that the holding means is a plunger which can be driven by a small current.

By using as a holding means a plunger capable of holding by suction even if suction is not possible, (1) a type that has a permanent magnet and loses the suction force when energized (2) has a suction force when energized without a magnet Both types can be driven with less current than the solenoid type that attracts the iron core.

According to a third aspect of the present invention, the charging means is a cam integrally provided on a planetary arm on which a planetary gear is mounted. And

As a result, a mechanism that satisfies the performance with a small number of parts is achieved, the work efficiency at the time of assembling is improved, and it is possible to contribute to a reduction in product costs as well as a reduction in parts costs.

In order to achieve the fourth object, the present invention according to claim 5, wherein the cam is provided with an internal gear that meshes with the planetary gear during the revolution of the planetary gear. Is provided at a position where a charging operation is performed while revolving while meshing with the internal gear.

Accordingly, when charging is performed against the urging force of the urging means, a large revolving force is generated in the planetary arm, so that the frictional force provided between the planetary gear and the planetary arm can be reduced, and the planetary gear can be reduced. The load during rotation transmission from the motor to the output gear is reduced, and a power split device with high transmission efficiency can be provided.

According to a sixth aspect of the present invention, in order to achieve the fifth object, the cam is designed to be engaged with the addendum circle of the planetary gear during the revolution of the planetary gear. It is provided at a position where charging is started after revolving to a position where the gear tip circle interferes.

This is equivalent to the presence of the internal gear, and when charging against the urging force of the urging means, a large revolving force is generated in the planetary arm. It can reduce the provided friction force,
The load during rotation transmission from the planetary gear to the output gear can be reduced, and a power split device with good transmission efficiency in a small space can be provided.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 9 is a cross-sectional view showing a layout of a main part of a camera to which the power split device of the embodiment is applied.

In FIG. 1, reference numeral 1 denotes a lens barrel, and 2 denotes a photographing lens which is held by the lens barrel 1. Lens barrel 1
Is movable in the optical axis direction by a lens barrel drive mechanism (not shown). Reference numeral 3 denotes a camera body having a patrone chamber 3a for loading a film patrone 4 therein. Reference numeral 3b denotes a spool chamber for storing the wound film F, and reference numeral 5 denotes a spool which is rotatably held in the spool chamber 3b and winds the film F drawn from the film cartridge 4. 6 is a drive motor, and a spool 5
And a driving source that outputs driving force to each power transmission mechanism described below.

Next, the configuration of the power split device provided in the camera of FIG. 1 will be described with reference to FIGS. FIG. 2 is a longitudinal sectional view of a main part of the power split mechanism of the camera of FIG. FIG. 3 is a diagram of the power split device of FIG. 1 viewed from below.

Reference numeral 7 denotes a motor ground plate, to which a drive motor 6 is attached with screws. Reference numeral 8 denotes a pinion gear, which is press-fitted into the output shaft of the drive motor 6 to transmit forward and reverse rotations of the drive motor 6. Reference numeral 9 denotes a planetary gear, which meshes with the pinion gear 8 and an upper portion of an internal gear 7a provided integrally with the main plate 7, and revolves around the pinion gear 8 by rotation of the pinion gear 8. Reference numeral 10 denotes a gear holder plate that supports the planetary gear 9 and rotates according to the revolution of the planetary gear 9. The gear holder plate 10 is integrally formed with a gear portion 10a. 11 is the same planet gear as the planet gear 9,
The gear 10a meshes with the lower part of the internal gear 7a, and revolves around the gear 10a by the rotation of the gear 10a. Reference numeral 12 denotes a gear holder plate that supports the planetary gear 11 and rotates according to the revolution of the planetary gear 11. or,
A gear portion 12a is formed integrally with the gear holder plate 12, and this gear 12a is a sun gear of a power split mechanism described later. That is, the rotational power of the drive motor 6 is transmitted to the sun gear 12a via the above-described reduction mechanism.

Reference numeral 13 denotes a planetary gear, which is rotatable around a planetary shaft 14, and is supported by the planetary arm 14 on a planetary arm 15 via a friction spring 16. That is, the planet gear 13 supported by the planet arm 15 can revolve around the sun gear 12a.

Reference numerals 17a to 17d denote output gears, which are meshing destinations of the planetary gears 13, and are rotatably supported by the motor ground plate 7, respectively.

Reference numeral 18 denotes a connecting gear which meshes with both of the output gears 17a and 17b. Reference numeral 19 denotes a lens barrel gear which meshes with the connecting gear 18 and is connected to a gear train of a lens barrel drive system (not shown) to transmit the rotation of the drive motor 6 to the movement of the lens barrel 1 in the optical axis direction.

Reference numerals 20a to 20c denote a film rewinding gear train which meshes with the output gear 17c and is further connected to a fork gear (not shown) from 20c.

Reference numeral 21 denotes a film winding gear, which is a two-stage gear having a gear meshing with the output gear 17d and a gear meshing with the gear 5a of the spool 5.

A plunger 22 is fixed to the motor base plate 7. In FIG. 2, only the position in the height direction is equivalently shown and drawn at an easily understood position.

An armature 23 has an attraction surface 23a in contact with the yoke attraction surface 22a of the plunger 22.
When the plunger 22 is energized while the suction surfaces 23a and 22a are in contact with each other as shown in FIG. 3, the suction is held.

Reference numeral 24 denotes a regulating lever, which is rotatably held by the motor ground plate 7 about the rotation center 24a, and the armature 23 is held by a dowel 24b provided on one arm so as to be able to swing by a small angle. . The dowel 24c provided on the other arm of the regulating lever 24 is provided with cam surfaces 15a to 15c and 15f to 15h provided on the outer peripheral portion of the planetary arm 15.
And a stopper that abuts against the cam follower and the rotation regulating surfaces 15d and 15e.

Reference numeral 25 denotes a tension spring.
4d, and urges the regulating lever 24 to rotate clockwise.

Reference numeral 26 denotes a gear pressing plate for preventing a number of gears from coming off. A photoreflector 27 indicated by a broken line in FIG. 3 is fixed to the gear holding plate 26. Further, a reflection plate 28 is attached to the planetary arm 15 and reflects the light projected from the photoreflector 27. That is, the photo reflector 27 detects and controls the rotational position of the planetary arm 15.

Next, the operation of the power split device having the above configuration will be described with reference to FIGS.

Normally, as shown in FIG. 3, the planetary gear 13 is in a state of being meshed with the output gear 17a. In this initial state, the reflection plate 28 is located below the photo reflector (hereinafter, referred to as PR) 27. Accordingly, at the beginning of each operation described below, the ON of the PR signal is detected to confirm that the planetary gear is at the initial position, and then the operation proceeds to each operation.

First, the lens barrel extending operation will be described.

When an operation switch (not shown) is turned on from the initial state, the drive motor 6 is energized in the forward direction, rotates forward, and the sun gear 12a rotates clockwise. The planetary gear 13, whose rotation has been suppressed by the action of the friction spring 16, tries to revolve clockwise together with the planetary arm 15 in accordance with the clockwise rotation of the sun gear 12 a, but the projection 15 i of the planetary arm has the slot 7 b of the motor base plate 7. The rotation of the sun gear 12a is transmitted in a counterclockwise rotation of the planetary gear 13 by abutment on the end face 7c. The rotation of the planetary gear 13 is transmitted to the clockwise rotation of the output gear 17a, and is sequentially transmitted to the counterclockwise rotation (in the direction of the solid arrow) of the connecting gear 18 and the clockwise rotation of the lens barrel gear 19, and the lens barrel 1 It moves out in the optical axis direction. At this time, the dowel 24c of the regulating lever 24 is in contact with the outer peripheral portion 15a of the planetary arm 15, and the armature 23 is
In contact with the suction surface 22a. When the lens barrel extending operation switch is turned off, the power supply to the drive motor 6 is cut off, and the movement of the lens barrel 1 stops.

Next, the lens barrel retracting operation will be described.

When an unillustrated lens barrel retraction switch is turned on from the initial state, reverse energization of the drive motor 6 is started and the drive motor 6 is rotated in reverse, and the sun gear 12a rotates counterclockwise. The planetary gear 13 whose rotation has been suppressed by the action of the friction spring 16 starts revolving in the counterclockwise direction together with the planetary arm 15 according to the counterclockwise rotation of the sun gear 12a. In conjunction with this, the dowel 24c of the regulating lever 24 is lowered along the cam surface 15b from the state of contact with the outer peripheral portion 15a of the planetary arm 15 according to the urging force of the tension spring 25, and rotates the regulating lever 24. That is, since the plunger 22 is not energized at this time, the armature 23 is not attracted. Then, the planetary arm 15 revolves to the position shown in FIG. 4, and the planetary gear 13 meshes with the output gear 17b. At this time, the dowel 24c of the regulating lever 24 contacts the cam surface 15c and the rotation regulating surface 15d to stop the planetary arm 15 from revolving further counterclockwise, and the rotation of the sun gear 12a causes the planetary gear 13 to rotate. It is transmitted clockwise. The rotation of the planetary gear 13 is the output gear 17b.
, And sequentially transmitted to the connecting gear 18 in the clockwise direction (in the direction of the dashed arrow) and the lens barrel gear 19 in the counterclockwise direction, and the lens barrel 1 retreats in the optical axis direction. I do. Then, the lens barrel retraction operation switch is turned off.
Then, the energization of the drive motor 6 is stopped, and the movement of the lens barrel 1 stops.

Then, as a return operation of the planetary gear 13, the drive motor 6 is immediately energized to start normal rotation by rotating forward, and the planetary gear 13 revolves clockwise with the planetary arm 15 according to the clockwise rotation of the sun gear 12 a. . At this time, the dowel 24c of the regulating lever 24 is interlocked with the revolution of the planetary arm 15.
Moves up from the state of contact with the cam surface 15c of the planetary arm 15 against the biasing force of the tension spring 25 along the cam surface 15b, and rotates the regulating lever 24 to a position where it contacts the outer peripheral portion 15a. Immediately before the planetary gear 13 meshes with the output gear 17a, ON of the signal of PR27 is detected, and after a predetermined time, the drive motor 6 stops. At this time, the planetary gear revolves to the position shown in FIG. 3, that is, the planetary gear 13 returns to the initial position where it meshes with the output gear 17a.

The movement of the lens barrel in the optical axis direction is performed by any one of a zooming operation (zoom), a focus adjustment operation (AF), a combination thereof (address zoom), and a collapsing operation of the photographing lens of the camera. But it doesn't matter.

Next, the operation when the planetary gear is switched to the film feeding system and the film winding operation will be described.

When a film winding instruction is given by an instruction from a microcomputer (not shown), the plunger 22 is energized by first confirming the ON of the signal of the PR 27 as described above from the initial state shown in FIG. Hold. In this state, the reverse energization of the drive motor 6 is started and the drive motor 6 rotates reversely, and the sun gear 12a rotates counterclockwise. The planetary gear 13, whose rotation has been suppressed by the action of the friction spring 16, rotates according to the counterclockwise rotation of the sun gear 12 a.
The planetary arm 15 starts revolving in the counterclockwise direction. At this time, the rotation of the regulating lever 24 is prevented by the suction holding state of the armature 23, and the dowel 24c of the regulating lever 24 is prevented.
However, it does not move down along the cam surface 15b of the planetary arm 15 according to the urging force of the tension spring 25. Accordingly, the dowel 24c does not engage with the revolution restricting surface 15d, and the planetary gear 13 continues to revolve, and moves to the position shown in FIG. In addition, the revolving beyond this is performed by the projection 15i of the planetary arm.
Is stopped because it contacts the end face 7d of the long hole 7b of the motor base plate 7, and the rotation of the sun gear 12a is transmitted in the clockwise rotation of the planetary gear 13. The rotation of the planetary gear 13 is transmitted to the counterclockwise rotation of the output gear 17d, and sequentially transmitted to the clockwise rotation of the winding gear 21 and the counterclockwise rotation of the spool gear 5a, and the film is wound on the spool 5.

Thereafter, the perforation of the film is detected, and when the winding complete signal for one frame is detected, the armature 23 is attracted and held by energization of the plunger 22, and the planetary gear 13 is immediately returned to the drive operation. When the motor 6 is positively energized and rotates forward, the planetary gear 13 revolves clockwise with the planetary arm 15 according to the clockwise rotation of the sun gear 12a. Also at this time, since the rotation of the regulating lever 24 is prevented by the suction holding state of the armature 23, the dowel 24c can revolve the planetary gear 13 without engaging the revolution regulating surface 15e, and the initial position shown in FIG. Return to. Also, as described above, the planetary gear 13 is
The ON of the signal of PR27 is detected immediately before meshing with 7a, and after a predetermined time, the drive motor 6 stops.

Next, the film rewinding operation will be described.

Similarly to the above-described winding operation, when a film rewinding instruction is given by a microcomputer (not shown),
From the initial state shown in FIG. 3, first, it is confirmed that the signal of the PR 27 is ON, and then the power is supplied to the plunger 22, and the armature 23 is held by suction. In this state, the drive motor 6 is reversely energized and reversely driven, and the planetary gear 13 starts revolving in the counterclockwise direction together with the planetary arm 15 according to the counterclockwise rotation of the sun gear 12a. At this time, the rotation of the regulating lever 24 is prevented by the suction holding state of the armature 23, and the dowel 24c keeps revolving without engaging the revolution regulating surface 15d, and moves to the position shown in FIG. The rotation of the sun gear 12a is transmitted to the clockwise rotation of the planetary gear 13 because the projection 15i of the planetary arm comes into contact with the end face 7d of the long hole 7b of the motor base plate 7, Counterclockwise rotation of output gear 17d, spool gear 5
The rotation is transmitted to the counterclockwise rotation of a, and the film is wound up by the spool 5. Then, when the perforation of the film is detected, and the movement signal of the film is detected, it can be determined that the dowel 24c has revolved without engaging the revolution control surface 15d to the position where the planetary gear 13 meshes with the output gear 17d for winding. Then, the power supply to the plunger 22 is cut off to release the armature 23 from being sucked and held.

Thereafter, the drive motor 6 is positively energized and rotates forward, and the planetary gear 13 revolves clockwise with the planetary arm 15 in accordance with the clockwise rotation of the sun gear 12a. At this time, the dowel 24c of the regulating lever 24 is lowered along the cam surface 15g from a state in which the dowel 24c is in contact with the outer peripheral portion 15h of the planetary arm 15 according to the urging force of the tension spring 25, thereby rotating the regulating lever 24. Then, the planetary arm 15 revolves to the position shown in FIG. 6, and the planetary gear 13 becomes the output gear 17c.
Mesh with. At this time, the dowel 24c of the regulating lever 24 contacts the cam surface 15f and the rotation regulating surface 15e to stop the planetary arm 15 from further revolving clockwise, and the rotation of the sun gear 12a is opposite to the rotation of the planetary gear 13. It is transmitted clockwise. The rotation of the planetary gear 13 is the output gear 17
The rotation is transmitted to the clockwise rotation of c, and sequentially transmitted to a film rewinding system gear train 20a to 20c and a fork gear (not shown) to rewind the film.

After the completion of the film rewinding, as a return operation of the planetary gear 13, the reverse drive of the drive motor 6 is started and the planetary gear 13 reverses, and the planetary gear 13 rotates in accordance with the counterclockwise rotation of the sun gear 12a. Revolves counterclockwise with. At this time, in conjunction with the revolution of the planetary arm 15, the dowel 24c of the regulating lever 24 climbs along the cam surface 15g from a state in which it contacts the cam surface 15f of the planetary arm 15 against the urging force of the tension spring 25, The regulating lever 24 is rotated to a position where it comes into contact with the outer peripheral portion 15h. Here, the armature 23 contacts the suction surface 22a of the plunger 22. After the drive motor 6 is reversely energized for a predetermined period of time, the plunger 22 is energized, and the armature 23 is sucked and held. Then, the drive motor 6 is energized and rotated forward, and the planetary gear 13 is rotated by the sun gear 12a. Revolves clockwise together with the planetary arm 15 in accordance with the clockwise rotation of. At this time, since the regulating lever 24 is prevented from rotating by the suction holding state of the armature 23, the dowel 24c can revolve without engaging the revolution regulating surface 15e, and the planetary gear 13 can revolve to the initial position shown in FIG. Return. Similarly to the above, the ON of the signal of PR27 is detected immediately before the planetary gear 13 meshes with the output gear 17a, and the drive motor 6 is stopped a predetermined time after that.

In the above embodiment, the power is divided into the lens barrel drive and the film feeding. However, the power can be divided into any drive such as shutter drive, up / down of a strobe light emitting unit, and insertion / removal of a film cartridge. It doesn't matter.

Next, the operation of the regulating lever interlocking when the planetary gear revolves will be described in detail with reference to FIGS.

FIGS. 7 to 9 show the planetary gear 13 and the output gear 1.
FIG. 7 is a view showing the teeth of 7a, 17b, 17c and 17d. FIG. 7 is equivalent to FIG. 4, and the sun gear 12a, the planetary gear 13 and the output gear 17b are meshed in a straight line. The dowel 24c is in contact with the cam surface 15c of the planet arm 15.

From this state, as a return operation of the planetary gear 13, the drive motor 6 is positively energized to start normal rotation, and the planetary gear 13 revolves clockwise with the planetary arm 15 according to the clockwise rotation of the sun gear 12a. The dowel 24c of the regulating lever 24 linked to the planetary arm 15 is
When starting climbing along the cam surface 15b from the state in which it comes into contact with the cam surface 15c of FIG.
The revolving force Fr exceeds this spring force due to the urging force of 5
is necessary. Therefore, as shown in FIG. 8, when the planetary arm 15 revolves until the dowel 24c of the regulating lever 24 comes into contact with the cam surface 15b of the planetary arm 15, the tooth tip of the planetary gear 13 becomes the tip circle (one point) of the output gear 17a. (Shown by a chain line), the tip of the tooth surface of the planetary gear 13 pushes the tooth surface of the coupling gear 18 by the counterclockwise rotation of the planetary gear 13, and the reaction force exceeds the urging force of the tension spring 25. An orbital force is generated.

Accordingly, the planetary arm 15 can rotate the regulating lever 24 to a position where the regulating lever dowel 24c contacts the outer peripheral portion 15a while charging the tension spring 25 (the state of FIG. 9).

Also, when the dowel 24c of the regulating lever 24 climbs along the cam surface 15g from the cam surface 15f of the planetary arm 15, similarly to the above, the tip of the planetary gear 13 is
7D, the revolving force exceeding the urging force of the tension spring 25 is generated, and the revolving lever 24 is rotated to a position where the regulating lever dowel 24c contacts the outer peripheral portion 15h while charging the tension spring 25. Can be.

(Second Embodiment) Next, a power split mechanism according to a second embodiment of the present invention will be described with reference to FIGS. The power split device of the second embodiment has an output gear of four as described in the first embodiment.
This is not provided, but is constituted by two output gears.

FIGS. 10 to 13 show a power split device according to the second embodiment. In these figures, reference numeral 30 denotes a sun gear, and the rotational power of the drive motor 6 is transmitted to the sun gear 30 via a speed reduction mechanism, as in the first embodiment.

Reference numeral 31a denotes a first planetary gear, and 31b denotes a second planetary gear, both of which are rotatably supported by the planetary arm 32, and which suppress rotation of each of the first planetary gear 31a and the second planetary gear 31b. It has a friction spring (not shown). That is, the planet gears 31 a and 31 b supported by the planet arm 32 can revolve around the sun gear 30.

Reference numerals 33a to 33b denote output gears, which are meshing destinations of the first planetary gear 31a and the second planetary gear 31b, and each of which is rotatably supported by a main plate (not shown).

Numeral 34 denotes a plunger which is fixed to a main plate (not shown).

Reference numeral 35 denotes an armature whose suction surface 35a is in contact with the yoke suction surface 34a of the plunger 34.
As shown in FIG. 10, when the plunger 34 is energized in a state where the suction surfaces 35a and 34a are in contact with each other, the suction is held.

Reference numeral 36 denotes a regulating lever, which is rotatably held on a base plate (not shown) about a rotation center 36a, and an armature 35 is held by a dowel 36b provided on the arm portion so as to be swingable by a small angle. The dowel 36c provided in the middle of the arm portion of the regulating lever 36 comes into contact with the cam followers and the rotation regulating surfaces 32d and 32e contacting the cam surfaces 32a to 32c and 32f to 32h provided on the outer peripheral portion of the planetary arm 32. Functions as a stopper.

Reference numeral 37 denotes a tension spring.
6d, and urges the regulating lever 36 to rotate clockwise.

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

First, the clockwise rotation output of the output gear 33a will be described.

Assuming that the initial state is the state shown in FIG. 10, when the operation switch (not shown) is turned on, the drive motor 6 starts to be forward-directed and rotates forward, and the sun gear 30 rotates clockwise.
The first planetary gear 31a tries to revolve clockwise with the planetary arm 32 in accordance with the clockwise rotation of the sun gear 30, but the planetary arm 32 is stopped from revolving by the stopper 38 of the main plate, and the rotation of the sun gear 30 is rotated by the first planetary gear. It is transmitted in the counterclockwise rotation of the gear 31a. The rotation of the first planetary gear 31a is transmitted to the clockwise rotation of the output gear 33a (in the direction of the solid arrow). At this time, the dowel 36c of the regulating lever 36 is
The armature 35 is in contact with the outer peripheral portion 32 a of the planetary arm 32, and the armature 35 is in contact with the suction surface 34 a of the plunger 34.

Next, the counterclockwise rotation output of the output gear 33a will be described.

From an initial state, an operation switch (not shown)
By ON, reverse energization of the drive motor 6 is started, and the drive motor 6 rotates in reverse.
The sun gear 30 rotates counterclockwise. 1st planetary gear 31
a and the second planetary gear 31b start revolving in the counterclockwise direction together with the planetary arm 32 according to the counterclockwise rotation of the sun gear 30. In conjunction with this, the dowel 36c of the regulating lever 36
Is lowered along the cam surface 32b from a state in which it comes into contact with the outer peripheral portion 32a of the planetary arm 32 according to the urging force of the tension spring 37, and rotates the regulating lever 36. That is, at this time, the armature 35 is not sucked because the plunger 34 is not energized. Then, the planetary arm 32 revolves to the position shown in FIG. 11, and the second planetary gear 31b meshes with the output gear 33a. At this time, the dowel 36c of the regulating lever 36 comes into contact with the cam surface 32c and the rotation regulating surface 3c.
2d, the further reciprocal counterclockwise rotation of the planet arm 32 is stopped, and the rotation of the sun gear 30 is stopped by the second planetary gear 3
The rotation is transmitted in the clockwise direction 1b. Second planetary gear 31b
Is transmitted to the output gear 33a in the counterclockwise direction (in the direction of the dashed arrow). At this time, the first planetary gear 31a idles without engaging with any gear. Thereafter, as a return operation of the planetary gears 31a and 31b, the drive motor 6 is positively energized to start normal rotation, and revolves clockwise with the planetary arm 32 in accordance with the clockwise rotation of the sun gear 30.
Return to the state of 0.

Next, the counterclockwise rotation output of the output gear 33b will be described.

First, from the initial state shown in FIG. 10, the plunger 34 is energized to hold the armature 35 by suction. In this state, the reverse energization of the drive motor 6 is started and the drive motor 6 rotates in the reverse direction.
The sun gear 30 rotates counterclockwise. Planetary gear 31a,
31b starts revolving in the counterclockwise direction together with the planetary arm 32 according to the counterclockwise rotation of the sun gear 30. At this time, the regulation lever 36 is prevented from rotating by the suction holding state of the armature 35, and the dowel 36c of the regulation lever 36 is
The planetary arm 32 according to the urging force of the tension spring 37
Does not fall along the cam surface 32b. Accordingly, the dowel 36c does not engage with the revolution restricting surface 32d, and the planetary arm 32 continues to revolve, and moves to the position shown in FIG. Further, the planetary arm 32 abuts against the stopper 38 on the main plate for further revolution, and the rotation of the sun gear 30 is transmitted in the clockwise rotation of the second planetary gear 31b.
The rotation of the second planetary gear 31b is transmitted to the counterclockwise rotation (in the direction of the solid arrow) of the output gear 33b.

Thereafter, as a return operation, the plunger 34
When the armature 35 is attracted and held by the power supply, the drive motor 6 is positively energized to rotate forward, and the planetary gears 31a, 3a
1b revolves clockwise with the planetary arm 32 according to the clockwise rotation of the sun gear 30. Also at this time, since the rotation of the regulating lever 36 is prevented by the suction holding state of the armature 35, the dowel 36c can revolve without engaging the dowel 36c with the revolution regulating surface 32e, and the initial position shown in FIG. Return to.

Next, the clockwise rotation output of the output gear 33b will be described.

Similarly to the above-described operation, the plunger 34 is energized from the initial state shown in FIG. 10, the armature 35 is attracted and held, and the drive motor 6 is reversely energized and reversely rotated.
2 revolves counterclockwise and moves to the position shown in FIG. After that, the power supply of the plunger 34 is cut off and the armature 3
After releasing the suction holding of 5, the drive motor 6 is positively energized to rotate forward, and the planetary arm 32 revolves clockwise. At this time, the dowel 36c of the regulating lever 36 is lowered along the cam surface 32g from a state in which it contacts the outer peripheral portion 32h of the planet arm 32 according to the urging force of the tension spring 37, and rotates the regulating lever 36. Then, the planetary arm 32 revolves to the position shown in FIG. 13, and the first planetary gear 31a meshes with the output gear 33b. At this time, dowel 3 of regulating lever 36
6c is in contact with the cam surface 32f and the rotation regulating surface 32c.
e, the further clockwise revolution of the planetary arm 32 is stopped, and the rotation of the sun gear 30 is stopped by the first planetary gear 31a.
Is transmitted in a counterclockwise rotation. The rotation of the first planetary gear 31a is the clockwise rotation of the output gear 33b (the direction of the dashed arrow).
Conveyed to.

Then, as a return operation, the reverse energization of the drive motor 6 is started and the drive motor 6 reversely rotates, and the planetary arm 32 revolves counterclockwise according to the counterclockwise rotation of the sun gear 30.
At this time, the regulating lever 36 is interlocked with the revolution of the planet arm 32.
The dowel 36c climbs along the cam surface 32g from a state in which it contacts the cam surface 32f of the planetary arm 32 against the urging force of the tension spring 37, and rotates the regulating lever 36 to a position in which it contacts the outer peripheral portion 32h. Let it. Here, amateur 3
5 contacts the suction surface 34a of the plunger 34. After the drive motor 6 is reversely energized for a predetermined period of time, the plunger 34 is energized to hold the armature 35 by suction. Revolves clockwise according to the clockwise rotation of.
At this time, since the regulating lever 36 is prevented from rotating by the suction holding state of the armature 35, the dowel 36c can revolve without engaging the dowel 36c with the revolution regulating surface 32e, and reaches the initial position shown in FIG. Return.

In both the first and second embodiments, the operation of returning to the initial position from the power split destination has been described. However, after driving at the power split destination is completed, a planetary gear is mounted at the split destination. It may be of a configuration that stays.

(Third Embodiment) Next, a power split device according to a third embodiment of the present invention will be described with reference to FIGS. The power split device according to the third embodiment is configured to achieve six-direction rotation with three output systems instead of four-direction rotation with two output systems as described in the first and second embodiments. .

FIGS. 14 to 17 are views showing a power split device according to the third embodiment. In these figures, reference numeral 40 denotes a sun gear, and the rotational power of the drive motor 6 is transmitted to the sun gear 40 via a speed reduction mechanism as in the first embodiment.

A planetary gear 41 is rotatably supported by the planetary arm 42 and has a friction spring (not shown) on the planetary gear 41 for suppressing rotation. That is, the planet gear 41 supported by the planet arm 42 can revolve around the sun gear 40.

Reference numerals 43a to 43c denote output gears, which mesh with the planetary gears 41, each rotatably supported by a main plate (not shown).

A plunger 44 is fixed to a main plate (not shown).

Reference numeral 45 denotes an armature whose suction surface 45a contacts the yoke suction surface 44a of the plunger 44.
When the plunger 44 is energized in a state where the suction surfaces 45a and 44a are in contact with each other as shown in FIG. 14, the suction is held.

Reference numeral 46 denotes an interlocking lever, which is rotatably held on a base plate (not shown) about a rotation center 46a, and the armature 45 is held by a dowel 46b provided on the arm so as to be able to swing by a small angle. The dowel 46c provided in the middle of the arm of the regulating lever 46 functions as a cam follower that comes into contact with cam surfaces 42a to 42g provided on the outer peripheral portion of the planetary arm 42.

Reference numeral 47 denotes a regulating lever, which is rotatably held on a main plate (not shown) around a pivot 46a, similarly to the interlocking lever 46. A claw 47a engages with the V-grooves 42h to 42j of the planet arm 42. And functions as a stopper for controlling the revolution of the planetary arm 42.

Reference numeral 48 denotes a torsion spring.
Is pivotally biased counterclockwise with respect to the interlocking lever 46. By the function of the torsion spring 48, the convex portion 47b of the regulating lever 47 is moved to the notch 46 of the interlocking lever 46.
d and are integrally connected.

Reference numeral 49 denotes a tension spring.
6e, and urges the interlocking lever 46 to rotate clockwise.

Reference numerals 50a and 50b denote internal gears fixed to a base plate (not shown), which mesh with the planet gear 41 in the process of revolving.

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

In the state of FIG. 14, the plunger 44
And the armature 45 is in a state of being sucked and held, and the claw portion 47 of the regulating lever 47 is
a engages with the V groove 42i of the planetary arm 42, and the revolution of the planetary arm 42 is stopped.

When the drive motor 6 is energized positively, the sun gear 40 rotates clockwise (solid arrow direction), and the output gear 43b rotates clockwise (solid arrow direction) via the counterclockwise rotation of the planetary gear 41. Communicate to

When the drive motor 6 is reversely energized,
The sun gear 40 rotates counterclockwise (in the direction of the dashed arrow) and transmits the clockwise rotation of the planetary gear 41 to the counterclockwise rotation of the output gear 43b (in the direction of the dashed arrow). That is, forward and reverse rotation to the output gear 43b can be transmitted in accordance with the direction of current supply to the drive motor 6.

Next, the operation of switching the planetary gears for changing the power split destination will be described.

When the power supply to the plunger 44 is cut off from the state shown in FIG. 14, the suction of the armature 45 is released, and the interlocking lever 46 rotates clockwise together with the regulating lever 47 in accordance with the urging force of the tension spring 49, and the claw portion 47a Escapes from the V groove 42i of the planetary arm 42 (the state of FIG. 15).

Thereafter, when the drive motor 6 is energized positively, the sun gear 34 rotates clockwise. Planetary gear 41 whose rotation is suppressed by the action of a friction spring (not shown)
Is the planetary arm 4 according to the clockwise rotation of the sun gear 40.
2 starts revolving clockwise. In conjunction with this, the dowel 46c of the interlocking lever 46 climbs along the cam surface 42c from a state in which it contacts the outer peripheral cam portion 42b of the planet arm 42 against the urging force of the tension spring 49, and turns the interlocking lever 46. Move. A dowel 46 is formed along the cam surface 42c.
When c rises, the planetary gear 41 meshes with the internal gear 50a, and the planetary arm 42 generates a revolving force capable of charging the tension spring 49. The restricting lever 47 also rotates counterclockwise in accordance with the rotation of the interlocking lever 46, but the tip of the claw 47 a of the restricting lever 47 is
A gap x is formed between the convex portion 47b of the regulating lever 47 and the notch portion 46d of the interlocking lever 46, as shown in FIG.
Is charged. And dowel 4 of the interlocking lever 46
6c comes into contact with the cam surface 42d of the planet arm 42,
The suction surface 45a of the armature 45 comes into contact with the suction surface 44a of the plunger 44, and when the plunger 44 is energized at this time, the armature 45 is suction-held.

Further, the revolution of the planet arm 42 continues, and the claw portion 47a of the regulating lever 47 falls into the V groove 42j of the planet gear 42 according to the urging force of the torsion spring 48 when the planet gear 41 meshes with the output gear 43a. The revolution of the arm 42 is locked (the state of FIG. 17).

At this point, when the drive motor 6 is energized positively, the sun gear 40 rotates clockwise (in the direction of the solid arrow).
Then, the output gear 4 is rotated via the counterclockwise rotation of the planetary gear 41.
When the transmission is performed in the clockwise direction of 3a (in the direction of the solid arrow) and the drive motor 6 is reversely energized, the sun gear 40 rotates in the counterclockwise direction (in the direction of the broken line), and the output gear 43a is rotated through the clockwise rotation of the planetary gear 41. Counterclockwise rotation (in the direction of the dashed arrow)
Communicate to

That is, the driving force of the driving motor 6 is transmitted to the output gear 43b in the forward and reverse directions in FIG.
In FIG. 17, the driving force of the driving motor 6 can be transmitted to the output gear 43a in forward and reverse rotations.

In the same manner as described above, when the claw portion 47a of the regulating lever 47 engages with the V groove 42h of the planet arm 42 and the planet gear 41 meshes with the output gear 43c, the drive motor 6
Can be transmitted to the output gear 43c in the forward and reverse rotations.

In the above embodiment, the configuration of three output systems has been described. However, a configuration of two or four or more output systems may be used.

In the first, second, and third embodiments, the plunger used together is of a type having a permanent magnet and having an attractive force when energized without a permanent magnet. It may be composed of a type that performs

Further, the present invention may combine the above-described embodiments or their technical elements as necessary.

Further, the present invention may be applied to a case where all or a part of the configuration of the claim or the embodiment forms one device or is combined with another device. , Which may be a constituent element of the device.

Also, the present invention relates to various types of cameras such as a single-lens reflex camera, a lens shutter camera, and a video camera.
Further, the present invention can be applied to optical devices and other devices other than cameras, and further to devices applied to the cameras, optical devices and other devices, or elements constituting these devices.

[0104]

As described above, the first embodiment according to the present application is described.
According to the invention, a solenoid-type plunger capable of sucking is not required, and a small and inexpensive power split device can be provided.

According to the second aspect of the present invention, since a plunger capable of being attracted and held by a small current is used as the holding means, power saving is achieved and an iron core such as a solenoid type plunger is used. An object of the present invention is to provide a power split device which does not generate sound when sucking and can surely switch planetary gears.

According to the third invention of the present application, a mechanism that satisfies the performance with a small number of parts is achieved, the work efficiency at the time of assembling is improved, and it is possible to contribute to a reduction in parts costs and a reduction in product costs. .

According to the fourth aspect of the present invention, a power split device which is automatically charged and which is easy to use can be provided.

According to the fifth invention of the present application, the load during rotation transmission is reduced, and a power split device with high transmission efficiency can be provided.

According to the sixth aspect of the present invention, it is possible to reduce the load during the rotation transmission and to provide a small power transmission device with high transmission efficiency by not providing the internal gear. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a layout of a main part of a camera to which a power split device according to the present invention is applied.

FIG. 2 is a longitudinal sectional view of a main part of a power split mechanism of the camera according to the first embodiment of the present invention.

FIG. 3 is a bottom view of a main part of the power split mechanism of the camera according to the first embodiment of the present invention, showing a state where a planetary gear meshes with a lens barrel extension gear;

FIG. 4 is a bottom view of a main part of the power split mechanism of the camera according to the first embodiment of the present invention, showing a state where a planetary gear meshes with a barrel rewind gear.

FIG. 5 is a bottom view of a main part of the power split mechanism of the camera according to the first embodiment of the present invention, showing a state in which a planetary gear meshes with a film winding gear.

FIG. 6 is a bottom view of a main part of the power split mechanism of the camera according to the first embodiment of the present invention, showing a state in which a planetary gear meshes with a film rewind gear.

FIG. 7 is a bottom view of a main part of the power split device according to the first embodiment of the present invention, showing a state where a planetary gear meshes with one output gear.

FIG. 8 is a bottom view of a main part of the power split device according to the first embodiment of the present invention, showing a state where the planetary gear starts charging while revolving orbiting.

FIG. 9 is a bottom view of a main part of the power split device according to the first embodiment of the present invention, showing a state in which charging is completed while the planetary gear is revolving halfway.

FIG. 10 is a bottom view of the power split device according to the second embodiment of the present invention, showing a state where the first output gear rotates clockwise.

FIG. 11 is a bottom view of the power split device according to the second embodiment of the present invention, showing a state where the first output gear rotates counterclockwise.

FIG. 12 is a bottom view of the power split device according to the second embodiment of the present invention, showing a state where the second output gear rotates counterclockwise.

FIG. 13 is a bottom view of the power split device according to the second embodiment of the present invention, showing a state where the second output gear rotates clockwise.

FIG. 14 is a bottom view of a power split device according to a third embodiment of the present invention, showing a state where a planetary gear meshes with one output gear.

FIG. 15 is a bottom view of the power split device according to the third embodiment of the present invention, showing a state where the planetary gears start revolving.

FIG. 16 is a bottom view of the power split device according to the third embodiment of the present invention, showing a state where charging is completed while the planetary gear is revolving halfway.

FIG. 17 is a bottom view of the power split device according to the third embodiment of the present invention, showing a state where the planetary gear meshes with another output gear.

FIG. 18 is a front view of a main part of a power split mechanism in a conventional camera or the like.

[Explanation of symbols]

6 Drive motors 12a, 30, 40 Sun gear 13, 41 Planetary gear 31a First planetary gear 31b Second planetary gear 15, 32, 42 Planetary arm 18 Connection gear 19 Barrel gears 17a to 17d, 33a to 33b, 43a to 43c Output gear 20 Film rewinding gear train 21 Film winding gear 22, 34, 44 Plunger 23, 35, 45 Armature 24, 36, 47 Regulatory lever 25, 37, 49 Tension spring 27 Photoreflector (PR) 28 Reflector 46 Interlocking Lever 48 Torsion spring 50 Internal gear

Claims (6)

[Claims] 1. A sun gear driven by a drive motor, a planetary gear revolving around the sun gear, a plurality of output gears respectively connected to a power transmission mechanism, and meshing the planetary gear with the output gear. A power split control means for selectively transmitting the driving force of the sun gear to the output gear, wherein the planetary gear transmits the driving force to one of the output gears. Regulating means for regulating the revolution of the gear to determine the position of the planetary gear, holding means for holding the position of the regulating means, and urging means for urging the holding means to release the holding means, After the holding of the regulating means is released according to the urging force of the urging means, when returning to the holding position by the holding means again, the charging means is provided for moving the regulating means against the urging force of the urging means. Octopus And a power split device. 2. The power split device according to claim 1, wherein said holding means is a plunger which can be driven by a very small current. 3. The power split device according to claim 1, wherein said charging means is a cam integrally provided on a planetary arm to which a planetary gear is attached. 4. The power split device according to claim 1, wherein the movement of the regulating means by the charging means is interlocked with the revolution of the planetary gear by the driving force of the driving motor. 5. A position where the cam is provided with an internal gear engaged with the planet gear during the revolution of the planet gear, and a charging operation is performed while the planet gear meshes with the internal gear and revolves. 5. The power split device according to claim 4, wherein the power split device is provided in the power split device. 6. The charging of the cam is started after the cam revolves to a position where the addendum circle of the planetary gear and the addendum circle of the output gear to be meshed next intersect during the revolution of the planetary gear. The power split device according to claim 4, wherein the power split device is provided at a position where the power is split.