JP2001225662A - Actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actuator with little power transmission loss. SOLUTION: This actuator 1 is provided with an actuator case 2 formed with a first spring plate 10 capable of pressurizing one sides of a first extension piece 6c of a wheel gear 5 and a second extension piece 8c of an output shaft 7 respectively, a torsion waiting spring 11 having one end and the other end locked to the first and second spring plates respectively, and a case shaft part 13b rotatably supporting a wheel gear 5, and the first and second spring plates 10, 12 and formed with an output shaft support part 14a rotatably supporting the output shaft 7 independent from the case shaft part 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator used for a switching drive device for switching between a neutral position and a drive position, or switching between two-wheel drive and four-wheel drive.

[0002]

2. Description of the Related Art As an actuator of this type, an actuator described in Japanese Patent Application Laid-Open No. 7-179138 is known.

[0003]

In the above-mentioned actuator, the gear and the bush member are rotatably mounted on the output shaft.
In the power transmission path from the spiral spring to the output shaft, there is a problem that the power transmission loss applied to the output shaft increases.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an efficient actuator with a small power transmission loss.

[0005]

Configuration of the Invention

[0006]

According to a first aspect of the present invention, there is provided an actuator having a motor having an armature shaft which rotates when energized, a worm formed on the armature shaft of the motor, and a first extension piece. A wheel gear meshing with the worm and rotating; an output shaft having a second extension piece; a first spring plate capable of pressing one side of the first and second extension pieces; A second spring plate capable of pressing the other side of the second extension piece and a first spring plate are disposed between the first and second spring plates. A torsion waiting spring having the other end locked to the second spring plate; a wheel gear;
An actuator case formed with a case shaft portion rotatably supporting each of the spring plates and an output shaft support portion rotatably supporting the output shaft; and an output shaft protruding outside the actuator case. Is provided with an output cam coupled to the end.

In the actuator according to a second aspect of the present invention, in addition to the structure of the first aspect, the actuator case includes a lower case and an upper case assembled to the lower case, and a case shaft is formed in the lower case. The output shaft support is formed on the upper case.

[0008] In the actuator according to the third aspect of the present invention, in addition to the configuration of the first or second aspect, the wheel gear and the first spring plate are turned around the case shaft portion via a sleeve extrapolated to the case shaft portion. The first spring plate is movably supported, and the second spring plate is rotatably supported by the case shaft via a cylindrical portion and a sleeve formed on the first spring plate. And

In the actuator according to a fourth aspect of the present invention, in addition to the structure of the first, second or third aspect, a wheel plate on which a first extension piece is formed is integrally connected to the wheel gear, The output shaft is formed such that the output shaft plate on which the second extension piece is formed is integrally connected to the output shaft.

In the actuator according to a fifth aspect of the present invention, in addition to the structure of the first, second, third or fourth aspect, the first extension piece of the wheel gear has first and second ends at both ends in the rotation direction. A second collision portion is formed, and a third and a fourth collision portion are formed on both ends of the second extension piece of the output shaft in the rotation direction, respectively. First and second locking portions are formed at both ends of the first spring plate, respectively, and the first spring plate is provided with a first spring receiver in which the first locking portion of the torsion waiting spring is locked; A first extension piece pressing portion that can collide with the second collision portion of the second extension piece and the fourth collision portion of the second extension piece is formed, and the second spring plate has One end in the direction is locked by the second locking portion of the torsion waiting spring, and the other end in the rotation direction is the first end of the first extension piece. A second extension piece pressing portion that is capable of colliding with the projection and the third collision portion of the second extension piece and being pressed is formed, and the torsion waiting spring is configured to perform the first collision of the first extension piece with the first extension piece. When the portion collides with the second extension piece pressing portion of the second spring plate and is pressed, the first extension piece pressing portion of the first spring plate presses the second extension piece. And the second collision portion of the first extension piece
When the second spring plate collides with and is pressed by the second extension piece pressing portion, the second extension piece pressing portion of the second spring plate accumulates an elastic repulsive force for pressing and rotating the second extension piece. It is characterized by having a configuration.

[0011]

In the actuator according to the present invention, the output shaft is rotatably supported by an output shaft supporting portion formed on the actuator case, and the wheel gear, the wheel gear, and the like. The first and second spring plates are each rotatably supported by a case shaft formed on the actuator case. Therefore, at the time of switching operation,
In the power transmission path from the wheel gear, the first and second spring plates, and the torsion waiting spring to the output shaft, loss of power transmission applied to the output shaft does not increase.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the actuator according to the present invention, an actuator which can be used in a two-wheel / four-wheel switching driving device will be described.

In general, in a shift mechanism associated with a two-wheel / four-wheel switching driving device, when a slider is operated by a shift fork fixed to a fork shaft to switch from two-wheel drive to four-wheel drive, the slider is used. Is moved in one direction, and the two gears are spline-fitted. At this time, if the two gears are out of phase, spline fitting cannot be performed. Therefore, the switching drive device is provided with a waiting mechanism composed of a spring so as to wait for the movement of the slider until the two gears are in phase. It has become.

When switching from four-wheel drive to two-wheel drive, the slider is moved in the other direction to release the spline engagement between the two gears. At this time, if the spline fitting is hard, it cannot be released. Therefore, the movement of the slider is waited by the operation of the waiting mechanism until the spline fitting is loosened.

The actuator of the present invention is used as a drive source of a shift fork for operating a slider.

FIGS. 1 to 6 show an embodiment of an actuator according to the present invention.

The illustrated actuator 1 mainly includes
From the actuator case 2, the motor 3, the worm 4, the wheel gear 5, the wheel plate 6, the output shaft 7, the output shaft plate 8, the output cam 9, the first spring plate 10, the torsion waiting spring 11, and the second spring plate 12. It is configured.

The actuator case 2 includes a lower case 1
3 and an upper case 14 mounted on the lower case 13. The lower case 13 includes the wheel gear 5, the first and second spring plates 10, 12 substantially at the center of the bottom plate 13a. A case shaft portion 13b for rotatably supporting is formed.

The case shaft portion 13b has a height smaller than the height of the side plate 13c of the lower case 13 and is formed so as to protrude above the bottom plate 13a, and first and second spring plates are provided near the base end thereof. 13d, and a wheel gear support 13e is disposed above the first and second spring plate supports 13d.

An output shaft insertion hole 13f is formed inside the case shaft portion 13b. The output shaft insertion hole 13f has a depth that is approximately half the height of the case shaft portion 13b, and a first bearing 15 is attached to the output shaft insertion hole 13f. A second shaft portion 7b formed on the output shaft 7 is rotatably supported by the first bearing 15.

The sleeve 16 is externally inserted into the case shaft 13b. The sleeve 16 is formed in a cylindrical shape having the same height dimension as the case shaft portion 13b, and a base end portion thereof is a first spring plate support portion 16a. The upper side is a wheel gear support 16b.

In the center of the upper case 14, an output shaft supporting portion 14a which is formed in a substantially cylindrical shape and protrudes above the lower case 13 independently of the case shaft portion 13b of the lower case 13 is formed. The output shaft support portion 14a has a shaft hole 14b formed in an inner peripheral portion thereof, and an oil seal 17 and a second bearing 18 are attached to the shaft hole 14b. The shaft hole 14b is formed in the case shaft portion 13b of the lower case 13.
At the output shaft insertion hole 13f formed at the bottom. Second
Of the first shaft portion 7 formed on the output shaft 7
a is rotatably supported. That is, the output shaft 7
It is rotatably supported by the output shaft support 14a via the second bearing 18.

The motor 3 is fixed to the side of the lower case 13 and is electrically connected to a 2WD / 4WD switching control circuit (not shown). This motor 3 has a lower case 13
An armature shaft 3a protruding inward is provided. A worm 4 is formed on the armature shaft 3a.

The armature shaft 3a is rotated forward when the two-wheel drive four-wheel switch provided in the two-wheel drive four-wheel switch control circuit is switched to the four-wheel drive mode.
The reverse rotation is performed by switching the 2WD / 4WD switch to the 2WD mode.

A wheel gear 5 is meshed with the worm 4 of the armature shaft 3a. Wheel gear 5 has
As shown in FIG. 2, a tooth portion 5b of a helical gear meshed with the worm 4 is formed on an outer peripheral edge of the wheel gear body 5a, and a sleeve 16 is inserted into the center of the wheel gear body 5a. Hole 5c is formed.

The wheel gear 5 includes a wheel gear supporting portion 13e formed on a case shaft portion 13b of the lower case 13.
The wheel gear 5 is rotatably supported by the wheel gear support portion 13e of the case shaft portion 13b via the wheel gear support portion 16b of the sleeve 16 because the wheel gear 5 is inserted into the wheel gear support portion 16b of the sleeve 16 corresponding to Have been. The wheel gear 5 has a wheel plate mounting portion 5d formed on the lower surface side of the wheel gear body 5a.

The wheel gear 5 is rotated clockwise in FIG. 3 by the forward rotation of the worm 4 together with the armature shaft 3a, and conversely, counterclockwise in FIG. 3 by the reverse rotation of the worm 4. It is turned.

The wheel plate 6 is integrally connected to the wheel plate mounting portion 5d of the wheel gear 5. The wheel plate 6 has a wheel gear fixing hole 6b at a substantially central portion of a plate-shaped wheel plate body 6a.
The wheel gear fixing hole 6b is fixed to the wheel plate mounting portion 5d of the wheel gear 5.

At the outer edge of the wheel plate body 6a,
The first extension piece 6c is formed. First extension piece 6c
Extends downward from the outer edge of the wheel plate main body 6a in the same arc shape as the tooth portion 5b of the wheel gear 5, and the extension length is the second length formed on the torsion waiting spring 11. To the lower side of the locking portion 11c.

The first extension piece 6c has a first collision portion 6c1 at one end in the rotation direction, and has a second collision portion 6c2 at the other end in the rotation direction.

The output shaft 7 is integrally formed with a first shaft portion 7a, a second shaft portion 7b, and a cam shaft 7c.

The first shaft portion 7a has a larger diameter than the second shaft portion 7b and the camshaft 7c.
An output shaft plate mounting portion 7d is formed at the lower end.

The second shaft portion 7b is disposed below the first shaft portion 7a, and is connected to the lower case 1 through a washer 19.
Output shaft insertion hole 13f formed in case shaft portion 13b of No. 3
Is inserted inside.

The cam shaft 7c protrudes out of the upper case 14 and is disposed above the first shaft portion 7a. The cam shaft 7c is eccentric by a predetermined length from the center of the first shaft portion 7a. The output cam 9 has a center and is fixed to the cam shaft 7c. The output cam 9 is used to engage with a shift fork provided in a two-wheel drive four-wheel switching mechanism (not shown) and move the shift fork.

An output shaft plate 8 is connected to the output shaft plate mounting portion 7d of the output shaft 7. An output shaft fixing hole 8b is formed in the output shaft plate 8 at a substantially central portion of a plate-shaped output shaft plate body 8a, and the output shaft fixing hole 8b is attached to an output shaft plate mounting portion 7d of the output shaft 7. It is fixed to.

A second extension piece 8c is formed on the outer edge of the output shaft plate body 8a. Second extension piece 8c
Is extended downward from the outer edge of the output shaft plate main body 8a in an arc shape having a radius larger than that of the first extension piece 6c, and the extension length is formed in the torsion waiting spring 11. It reaches the lower side of the second locking portion 11c. The second extension piece 8c is the first extension piece 6c of the wheel plate 6.
Is arranged in a non-contact manner with the first extension piece 6c on the outside.

The second extension piece 8c has a third collision portion 8c1 at one end in the rotation direction and a fourth collision portion 8c2 at the other end in the rotation direction.

The first spring plate 10 is arranged below the wheel gear 5. The first spring plate 10 has a disk-shaped first spring plate main body 10.
A cylindrical portion 10b protruding into a cylindrical shape is formed on the lower surface side of a, and an insertion hole 10c for inserting the sleeve 16 from the central portion of the first spring plate main body 10a to the central portion of the cylindrical portion 10b is formed. Communication is formed. A first spring support 10d is formed in a part of the cylindrical portion 10b, and is cut in a slit shape from the distal end portion in the axial direction of the cylindrical portion. A first extension piece pressing portion 10e is formed on the outer edge of the first spring plate body 10a so as to protrude outward in a rectangular shape.

The first spring plate 10 has its insertion hole 1
0c is inserted through the first spring plate support 16a of the sleeve 16 corresponding to the first and second spring plate support 13d formed on the case shaft 13b of the lower case 13. The spring plate 10 is connected to the first and second spring plate support portions 13 of the case shaft portion 13b via the first spring plate support portion 16a of the sleeve 16.
d, and is rotatably supported by the first spring support 10d.
The first locking portion 11b formed at one end (base end) of the torsion waiting spring 11 is locked to the first extension piece pressing portion 10e. Second collision portion 6c2 formed on piece 6c, and output shaft plate 8
Are arranged so as to be able to abut against the fourth collision portions 8c2 formed on the second extension piece 8c.

The second spring plate 12 is arranged below the torsion waiting spring 11 in a pair with the first spring plate 10 with the torsion waiting spring 11 interposed therebetween. This second
Of the second spring plate main body 12a formed in a disc shape, a through hole penetrated in a round hole shape for insertion into the cylindrical portion 10b of the first spring plate 10. A second extension plate pressing portion 12c is formed on the outer edge portion of the second spring plate main body 12a so as to protrude outward in a rectangular shape.

The second spring plate 12 has its insertion hole 1
2b is inserted through the cylindrical portion 10b of the first spring plate 10, and is rotatably supported by the cylindrical portion 10b. That is, the second spring plate 12 is rotatably supported by the first and second spring plate support portions 13d of the case shaft portion 13b via the cylindrical portion 10b and the sleeve 16 of the first spring plate 10. ing. The second extension piece pressing portion 12c is connected to the first extension piece 6c of the wheel plate 6.
And the third collision portion 8 formed on the second extension piece 8c of the output shaft plate 8.
Each of them is arranged so as to be able to abut on c1. Also, the second
A second locking portion 11c formed at the other end (tip) of the torsion waiting spring 11 is locked to the extension piece pressing portion 12c.

The torsion waiting spring 11 has a first locking portion 11b formed at one end (base end) of a spring main body 11a formed in a torsion coil shape, and at the other end (distal end) of the spring main body 11a. A second locking portion 11c is formed.

In FIG. 3, when the wheel gear 5 rotates clockwise, the first extension piece 6c of the wheel plate 6 pushes the second extension piece of the second spring plate 12 when the torsion waiting spring 11 rotates. To press the portion 12c clockwise, a clockwise pressing force is applied to the second locking portion 11c,
By applying a clockwise pressing force to the first locking portion 11b via the elastic repulsive force accumulated in the spring main body 11a,
Of the output shaft plate 8 which is in contact with the first extension piece pressing portion 10e of the first spring plate 10 in the clockwise direction. By pressing, the output shaft 7 is rotated clockwise.

The torsion waiting spring 11 is contrary to the above, and FIG.
, When the wheel gear 5 rotates counterclockwise,
Since the first extension piece 6c of the wheel plate 6 presses the first extension piece pressing portion 10e of the first spring plate 10 in the counterclockwise direction, the first locking portion 11b is rotated counterclockwise. A pressing force is applied, and a counterclockwise pressing force is applied to the second locking portion 11c via the elastic repulsive force accumulated in the spring main body 11a, thereby causing the second spring plate 12 to rotate counterclockwise. The second rotation of the output shaft plate 8 in contact with the second extension piece pressing portion 12c of the second spring plate 12
By pressing the extension piece 8c of
The output shaft 7 is rotated counterclockwise.

In the actuator 1 having such a structure, the output cam 9 is engaged with a shift fork of a two-wheel drive / four-wheel drive switching mechanism (not shown), and is mounted close to the two-wheel drive / four-wheel drive switching mechanism. The vehicle is electrically connected to a four-wheel drive switching control circuit and mounted on a vehicle.

In the actuator 1, if the 2WD 4WD switch is not switched and the motor 3 is not energized by the 2WD 4WD control circuit, as shown in FIG. First extension piece 6
c and the fourth collision portion 8c2 of the second extension piece 8c of the output shaft plate 8 contact the first extension piece pressing portion 10e of the first spring plate 10. I have. The first collision portion 6c1 of the first extension piece 6c and the third collision portion 8c1 of the second extension piece 8c are connected to the second extension piece pressing portion 12c of the second spring plate 12. Abut. The 2WD / 4WD switching mechanism is at the 2WD position.

In FIG. 3, the two-wheel drive four-wheel switch is set to two.
When the mode is switched from the driving mode to the 4WD mode, the motor 3 is energized in the forward direction, so that the wheel gear 5
When the first extension piece 6c of the wheel plate 6 is rotated clockwise, the first rotation is started in a clockwise direction.
The second collision portion 6c1 of the extension piece 6c of the
The second extension piece pressing portion 12c of the spring plate 12 of FIG.
As shown in (2), a clockwise pressing force is applied to the second locking portion 11c of the torsion wait spring 11 in the clockwise direction. Then, a clockwise pressing force is applied to the first locking portion 11b and the first spring plate 10 of the torsion wait spring 11 via the elastic repulsive force accumulated in the spring main body 11a of the torsion wait spring 11.

At this time, in the shift mechanism, if the two gears that are spline-fitted by the slider moved by the shift fork are out of phase, the shift fork cannot move, and the output cam 9 is thus restrained. .

For this reason, the second extension piece 8c of the output shaft plate 8 fixed to the output shaft 7 is also restrained, and the first spring plate 10 cannot rotate and remains at the position shown in FIG.

The motor 3 is stopped at the position shown in FIG. 4 by being interrupted by an auto stop switch (not shown) provided in the 2WD 4WD switching control circuit.

When the phases of the two gears match,
The constraint on the output cam 9 is released.

As a result, the first spring plate 10 is pressed and rotated clockwise in FIG. 4 by the elastic repulsive force accumulated in the spring body 11a, and the first extended piece pressing portion of the first spring plate 10 is rotated. The second extension piece 8c of the output shaft plate 8 against which the fourth collision portion 8c2 is in contact with 10e is pressed clockwise, and is rotated to the position shown in FIG. Accordingly, the output shaft 7 is rotated clockwise from the position shown in FIG. 4 to the position shown in FIG. 5, and at a predetermined position therebetween, the rotating output cam 9 moves the shift fork, and the two-wheel drive four-wheel switching mechanism is driven. The position is switched from the 2WD position to the 4WD position. At the position shown in FIG. 5, the third collision portion 8c1 of the second extension piece 8c collides with the second extension piece pressing portion 12c, and the first extension piece pressing portion 10e moves to the first The second extension piece 8c and the first extension piece pressing portion 10e stop by colliding with the second collision portion 6c2 of the extension piece 6c.

When the 2WD 4WD switch is set to 4 from the 2WD mode
If the two gears are not out of phase when switched to the drive mode, the gears are rotated from the position shown in FIG. 3 to the position shown in FIG. 5, and the output cam 9 moves the shift fork at a predetermined position therebetween. The 2WD / 4WD switching mechanism switches from the 2WD position to the 4WD position.

Next, in the state shown in FIG. 5, when the two-wheel drive four-wheel switch is switched from the four-wheel drive mode to the two-wheel drive mode, the motor 3 is energized in the reverse direction, so that the wheel gear 5 is turned counterclockwise. When the first extension piece 6c of the wheel plate 6 is rotated counterclockwise, the second collision portion 6c2 of the first extension piece 6c abuts. The first extension piece pressing portion 10e of the first spring plate 10 is rotated counterclockwise as shown in FIG.
A counterclockwise pressing force is applied to the first locking portion 11b of the torsion waiting spring 11. Then, a counterclockwise pressing force is applied to the second locking portion 11c and the second spring plate 12 of the torsion wait spring 11 via the elastic repulsive force accumulated in the spring main body 11a of the torsion wait spring 11. .

At this time, if the shift fork cannot move due to the spline fit between the two gears, the output cam 9 is restrained. For this reason, the second extension piece 8c of the output shaft plate 8 fixed to the output shaft 7 is also restrained, and the second spring plate 12 cannot rotate and stays at the position shown in FIG.

The motor 3 is stopped at the position shown in FIG.

When the spline fit between the two gears is loosened, the restraint on the output cam 9 is released.

As a result, the second spring plate 12 is pressed and rotated counterclockwise in FIG. 4 by the elastic repulsive force accumulated in the spring main body 11a, and the second spring plate 12
The second extension piece 8c of the output shaft plate 8 against which the third collision portion 8c1 is in contact with the extension piece pressing portion 12c is pressed in the counterclockwise direction, and is turned to the position shown in FIG. Therefore,
The output shaft 7 is rotated in the counterclockwise direction from the position shown in FIG. 6 to the position shown in FIG. 3, and at a predetermined position therebetween, the rotating output cam 9 moves the shift fork to cause the two-wheel drive four-wheel switching mechanism to rotate. The position is switched from the drive position to the two-drive position.

At the position shown in FIG. 3, the second extension piece 8c
The fourth collision portion 8c2 collides with the first extension piece pressing portion 10e, the second extension piece pressing portion 12c collides with the first collision portion 6c1 of the first extension piece 6c, The second extension piece 8c and the second extension piece pressing portion 12c stop.

When the 2WD 4WD switch is set to 2 from the 4WD mode
If the spline fit between the two keys is loose when the mode is switched to the drive mode, the key is rotated from the position shown in FIG. 5 to the position shown in FIG. 3, and the output cam 9 moves the shift fork at a predetermined position therebetween. The two-wheel drive four-wheel switching mechanism switches from the four-wheel drive position to the two-wheel drive position.

Note that the actuator 1 in this embodiment is
Has been described as an actuator used in a two-wheel drive four-wheel drive drive device, but it can also be used as an actuator for a switch drive device such as a neutral position drive position.

[0063]

As described above, according to the actuator according to the first, second, third, fourth and fifth aspects of the present invention, the output shaft pivots on the output shaft supporting portion formed on the actuator case. Supported, wheel gear, first,
The second spring plates are rotatably supported by a case shaft formed on the actuator case.
Therefore, there is an excellent effect that the loss of power transmission applied to the output shaft is small in the power transmission path from the wheel gear, the first and second spring plates, and the torsion waiting spring to the output shaft during the switching operation.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of an actuator according to the present invention.

FIG. 2 is an external perspective view for explaining an assembling relation of each part of a main part in the actuator shown in FIG. 1;

FIG. 3 is a plan view around a torsion waiting spring in the actuator shown in FIG. 1;

FIG. 4 is a plan view for explaining the movement around the torsion waiting spring in the actuator shown in FIG. 1;

FIG. 5 is a plan view for explaining the movement around the torsion waiting spring in the actuator shown in FIG. 1;

FIG. 6 is a plan view illustrating a movement around a torsion waiting spring in the actuator shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Actuator 2 Actuator case 3 Motor 3a Armature shaft 4 Worm 5 Wheel gear 6 Wheel plate 6c First extension piece 6c1 First collision portion 6c2 Second collision portion 7 Output shaft 8 Output shaft plate 8c Second extension Piece 8c1 third collision part 8c2 fourth collision part 9 output cam 10 first spring plate 10d first spring receiver 10e first extended piece pressing part 11 torsion waiting spring 11a spring body 11b first locking Part 11c Second locking part 12 Second spring plate 12c Second extending piece pressing part 13 Lower case 13b Case shaft part 14 Upper case 14a Output shaft support part 16 Sleeve

Continuation of the front page F term (reference) 3D036 GA40 GB05 GH26 GJ17 3J009 EA06 EA19 EA32 EB24 EC06 EC10 ED10 FA04

Claims (5)

[Claims] A motor having an armature shaft that rotates when energized; a worm formed on the armature shaft of the motor; a wheel gear having a first extending piece and rotating by being engaged with the worm; An output shaft having two extension pieces; a first spring plate capable of pressing one side of the first and second extension pieces; and pressing the other side of the first and second extension pieces. A possible second spring plate, disposed between the first and second spring plates, one end of which is locked to the first spring plate, and the other end of which is connected to the second spring plate. And a case shaft portion rotatably supporting the wheel gear and the first and second spring plates, respectively, and rotatably supporting the output shaft. Actuator with output shaft support And Takesu, actuator, characterized in that protrudes outside said actuator case is provided with an output cam which is coupled to an end of the output shaft. 2. An actuator case comprising: a lower case; and an upper case attached to the lower case, wherein a case shaft is formed in the lower case, and an output shaft support is formed in the upper case. The actuator according to claim 1, characterized in that: 3. The wheel gear and the first spring plate,
The second spring plate is rotatably supported by the case shaft portion via a sleeve extrapolated to the case shaft portion, and the second spring plate is connected to the cylinder portion and the sleeve formed on the first spring plate. The actuator according to claim 1, wherein the actuator is rotatably supported by the case shaft. 4. A wheel plate on which a first extension piece is formed is integrally connected to the wheel gear, and an output shaft plate on which a second extension piece is formed is integrally formed with the output shaft. 2. The method according to claim 1, wherein
4. The actuator according to 2 or 3. 5. A first extension piece of a wheel gear has first and second collision portions formed at both ends in a rotation direction of the first extension piece, and a second extension piece of an output shaft has the first and second collision portions. Third and fourth collision portions are formed at both ends in the rotation direction, respectively. First and second locking portions are formed at both ends of the spring body of the torsion waiting spring, respectively. A first spring receiver in which a first locking portion of the torsion waiting spring is locked, a second collision portion of the first extension piece, and a fourth collision portion of the second extension piece. A first extension piece pressing portion that can collide with the collision portion is formed, and one end of the second spring plate in the rotation direction is locked by the second locking portion of the torsion waiting spring. And the other end in the rotation direction collides with the first collision portion of the first extension piece and the third collision portion of the second extension piece and can be pressed. A second extension piece pressing portion is formed, and the torsion wait spring presses the first extension piece of the first extension piece by colliding with the second extension piece pressing portion of the second spring plate. When the first extension piece is pressed, the second extension piece is pressed and rotated by the first extension piece pressing portion of the first spring plate, and the second collision portion of the first extension piece moves to the first extension piece. First of spring plate
When the second spring plate collides with and is pressed by the second extension piece pressing portion, the second extension piece pressing portion of the second spring plate accumulates an elastic repulsive force for pressing and rotating the second extension piece. The actuator according to claim 1, 2, 3, or 4, wherein: