WO2012137808A1

WO2012137808A1 - Actuator

Info

Publication number: WO2012137808A1
Application number: PCT/JP2012/059164
Authority: WO
Inventors: 晃照田代; 匡伸西本; 忠夫結城; 敏嗣小田
Original assignee: アイシン精機株式会社
Priority date: 2011-04-08
Filing date: 2012-04-04
Publication date: 2012-10-11
Also published as: CN203499391U; JP2012219510A; JP5327266B2

Abstract

An actuator is provided with a case, a stopper which is provided to the case so as to extend in the protrusion direction, a worm wheel which is provided to the case, an engagement protrusion which protrudes from the worm wheel, and a torsion coil spring which is housed within the worm wheel. The engagement protrusion makes contact with the stopper to restrict the worm wheel to a predetermined initial position. The torsion coil spring has a first leg which is engaged with the stopper and a second leg which is engaged with the engagement protrusion at a position further toward the outside in the protrusion direction than the stopper. The torsion coil spring presses the worm wheel in the direction in which the engagement protrusion makes contact with the stopper.

Description

Actuator

The present invention relates to an actuator.

Conventionally, various actuators have been proposed. For example, Patent Literature 1 discloses an actuator that is applied to a locking device related to locking and unlocking of a vehicle. In the actuator, an output member that is rotated by an electric motor is accommodated in a case that forms the casing. A semi-cylindrical spring mounting wall is provided on the bottom surface of the case so as to protrude. A semi-cylindrical engagement piece is provided on the bottom surface of the output member so as to protrude. The engaging piece is disposed on the radially inner side of the spring mounting wall. A return spring is accommodated in the case. Both leg portions, i.e., both ends of the return spring can be locked to the spring mounting wall and the engaging piece. The output member released from the driving force of the electric motor is urged in the circumferential direction so as to return to a predetermined neutral position by a return spring. In the neutral position, both legs of the return spring are locked to the spring mounting wall and the engaging piece. On the other hand, the output member rotates in the forward and reverse directions against the biasing force of the return spring by the driving force of the electric motor, thereby selectively switching between the locked state and the unlocked state according to the rotation direction.

Further, Patent Document 2 discloses an actuator applied to a release device related to release of a latch mechanism that can hold a vehicle door in a closed state. An output member that is rotated by an electric motor is also housed in the case that forms the housing of the actuator. The case also houses a return spring in which both leg portions are locked to the case and the output member. The output member released from the driving force of the electric motor is urged in the circumferential direction so as to return to a predetermined initial position by a return spring. On the other hand, the output member releases the latch mechanism by rotating in a predetermined direction against the biasing force of the return spring by the driving force of the electric motor. Since the actuator of Patent Document 2 does not employ a configuration in which the operation is switched by forward and reverse rotation from a predetermined neutral position, unlike the actuator of Patent Document 1, the mechanical and electrical configuration of the actuator is naturally simplified. ing.

JP-A-8-13881 JP 2005-315022 A

By the way, in the actuator of Patent Document 2, the predetermined initial position of the output member fluctuates due to the influence of external force or vibration applied to the return spring, so that the accuracy of the initial position may vary. Therefore, it is also proposed to arrange a stopper and an engaging protrusion on the case and the output member, respectively, and to return the rotating position of the output member that contacts the stopper and the engaging protrusion to a predetermined initial position by a return spring. Has been.

When the output member is assembled to the case with the return spring interposed as described above, for example, the following procedure is performed. First, with the first leg, which is one leg of the return spring, locked at an appropriate position of the case, the second leg, which is the other leg, remains in the elastic return state (free state) of the return spring. Is locked at an appropriate position of the output member. At this time, it is necessary to rotate the output member until the stopper and the engaging protrusion come into contact with each other in the temporarily assembled state against the urging force of the return spring. In this case, the output member is rotated to the initial position in an unstable temporary assembled state, and for example, the leg portion (first or second leg portion) of the return spring can be detached from the case or the output member during the assembly work. There is sex.

Therefore, in order to facilitate the assembly work of the members such as the output member, it is necessary to set a required gap between the members while setting the parts accuracy of these members extremely high. Further, since the output member is assembled to a member such as a return spring housed in the case, it is obstructed by the output member, making it difficult to assemble visually, and positioning between the members becomes difficult. End up.

An object of the present invention is to provide an actuator capable of improving the assembling property without impairing accuracy.

In order to solve the above-described problems, one embodiment of the present invention is provided with a case, an output member that is rotatably accommodated in the case and rotated by an electric motor, and extends in the protruding direction in the case. A torsion coil spring, comprising: a stopper; an engaging protrusion that protrudes from the output member and contacts the stopper to restrict the output member to a predetermined initial position; and a torsion coil spring housed in the case The first leg portion provided at one end and locked to the case, and the second leg portion provided at the other end and locked to the engagement protrusion outside the stopper in the protruding direction of the stopper And the torsion coil spring provides an actuator that urges the output member in a direction in which the engagement protrusion comes into contact with the stopper.

According to this configuration, both legs (first and second legs) of the torsion coil spring are locked to the case and the engaging protrusion, respectively. The output member released from the driving force of the electric motor is moved in the circumferential direction so that the engagement protrusion is brought into contact with the stopper by the torsion coil spring, that is, returned to the predetermined initial position. It is energized. On the other hand, the output member performs a required operation by rotating in a predetermined direction in which the engaging protrusion is separated from the stopper against the biasing force of the torsion coil spring by the driving force of the electric motor. .

Here, the engagement protrusion is a portion that is brought into contact with the stopper in order to restrict the output member to the predetermined initial position. The engaging protrusion is also a part for locking the second leg of the torsion coil spring. Therefore, the output member is assembled to the case with the torsion coil spring interposed. In this case, first, the torsion coil spring is temporarily assembled to the case in a state where the first leg portion of the torsion coil spring is locked to the case. At this time, the torsion coil spring is accommodated in the case in an elastic return state (free state), and the second leg portion is disposed outside the stopper in the protruding direction of the stopper. Subsequently, for example, the second leg portion is locked to the engagement protrusion by the engagement margin of the protruding portion of the second leg portion outward from the stopper. The output member is rotated against the urging force of the torsion coil spring to a rotation position where the engagement protrusion gets over the stopper, that is, a rotation position corresponding to a predetermined initial position. Then, in this state, when the output member is moved along the axial direction toward the case, the engagement protrusion is rotated while increasing the engagement allowance of the second leg portion and the engagement protrusion. Abuts against the stopper in a direction. The output member is arranged at the predetermined initial position with the torsion coil spring interposed, and the assembly of the output member to the case is completed. Thus, the output member can be smoothly assembled to the case.

In the present invention, it is possible to provide an actuator that can improve assemblability without impairing accuracy.

The top view which shows the actuator which concerns on one Embodiment of this invention. The top view which shows the actuator of the state which removed the worm wheel of FIG. The top view which shows the actuator in the openable state of the vehicle door of the embodiment. The top view which shows the actuator of the state which removed the worm wheel of FIG. (A)-(c) is a perspective view which shows the assembly | attachment aspect of the embodiment.

An actuator according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5 (c). As shown in FIG. 1, the actuator is applied to a release device mounted on a vehicle door (not shown) such as an automobile. The actuator includes a box-shaped case 11 that forms the casing. The case 11 is made of a resin material. The case 11 houses an electric motor 12 on the right side of the figure. A rotating shaft 12 a of the electric motor 12 extends along the horizontal direction in the figure, and is rotatably supported by the case 11 at the center of the case 11. A worm 13 is fixed to the rotary shaft 12a.

The case 11 is provided with a support portion 14 protruding from the bottom surface. The support portion 14 is disposed on the upper side of the worm 13 in the figure. As shown in FIG. 5A, the support portion 14 has a stepped cylindrical shape. That is, the support portion 14 has a large diameter portion located on the proximal end side and a small diameter distal end portion 14b located on the distal end side via the annular step 14a. As shown in FIG. 1, the worm wheel 15 is rotatably supported by the support part 14 at the front-end | tip part 14b in the aspect mounted in the level | step difference 14a. That is, the worm wheel 15 has a cylindrical shaft portion 15a at the center thereof. The worm wheel 15 is rotatably supported by the support portion 14 by inserting the tip portion 14b of the support portion 14 into the shaft portion 15a of the worm wheel 15. The worm wheel 15 meshes with the worm 13 and rotates around the axis of the support portion 14 in conjunction with the rotation of the worm 13 (rotating shaft 12a). The worm wheel 15 constitutes a worm gear together with the worm 13. The worm wheel 15 is formed with a substantially spiral cam portion 15b that goes radially outward from the shaft portion 15a in the counterclockwise direction shown in the drawing.

Further, as shown in FIG. 2, the case 11 is provided with a stopper 31 protruding from the bottom surface on the lower side in the drawing, which is the outer peripheral side of the support portion 14. The stopper 31 has a partial cylindrical shape concentric with the support portion 14, that is, has an arc-shaped peripheral wall. A first end surface 31 c is formed on the tip end side in the protruding direction of the stopper 31. The first end face 31 c has an arc shape centered on the center of the support portion 14, that is, the rotation axis of the worm wheel 15. On the other hand, a substantially flat cylindrical engagement protrusion 32 is provided on the bottom surface of the worm wheel 15 so as to protrude. The engagement protrusion 32 extends from the bottom surface of the worm wheel 15 toward the bottom surface of the case 11, that is, toward the back side orthogonal to the paper surface in FIG. 2. A second end face 32a (see FIG. 5B) is formed on the distal end side of the engaging protrusion 32 in the protruding direction. The second end surface 32a has a substantially flat circular shape. The stopper 31 is disposed at a position where the rotation locus of the engaging protrusion 32 is blocked when the worm wheel 15 rotates around the axis of the support portion 14. Therefore, the rotation range of the worm wheel 15 around the axis of the support portion 14 is a predetermined rotation position (hereinafter referred to as “initial position Ps”) where the engagement protrusion 32 abuts the left end surface 31a of the stopper 31 in the drawing. Therefore, as shown in FIG. 4, a predetermined rotation position (hereinafter also referred to as “maximum rotation position Pm”) at which the engagement protrusion 32 abuts on the right end (opposite side) end surface 31b of the stopper 31 as shown in FIG. It is regulated within the range.

Furthermore, a torsion coil spring 33 is accommodated in the case 11 around the axis of the support portion 14 which is the radially inner side of the stopper 31. As shown in FIGS. 5A to 5C, the torsion coil spring 33 is substantially concentric with the support portion 14 wound in the clockwise direction from the proximal end side to the distal end side of the support portion 14. Coil part 33a. The torsion coil spring 33 has a first leg portion 33b formed by folding back the base end of the support portion 14 connected to the coil portion 33a, and further, the tip end of the support portion 14 connected to the coil portion 33a is folded back. It has the 2nd leg part 33c. Note that the tip of the coil portion 33 a is disposed more outwardly than the stopper 31 in the protruding direction of the stopper 31, that is, in the axial direction of the support portion 14. Accordingly, the second leg portion 33 c is also arranged outside the stopper 31 in the protruding direction of the stopper 31. That is, the second leg portion 33 c is disposed above the upper end 31 c of the stopper 31.

The first leg 33b is locked to the end surface 31b of the stopper 31. On the other hand, the second leg portion 33c is disposed in the vicinity of the end face 31b in the elastic return state (free state) of the torsion coil spring 33. The second leg portion 33c is locked to the engaging protrusion 32 of the worm wheel 15 in a state where the second leg portion 33c is rotated in the clockwise direction in the figure against the urging force of the torsion coil spring 33 from the end surface 31b to the vicinity of the end surface 31a. Yes. As a result, the worm wheel 15 is biased toward the illustrated counterclockwise rotation direction, that is, the direction in which the engagement protrusion 32 is in contact with the end surface 31 a of the stopper 31, that is, the initial position Ps. On the other hand, the worm wheel 15 rotates in the clockwise direction shown in the figure against the urging force of the torsion coil spring 33, so that the maximum rotation position Pm at which the engagement protrusion 32 abuts on the end surface 31b of the stopper 31. Move to.

That is, the engagement protrusion 32 is a part that makes the worm wheel 15 contact the stopper 31 in order to restrict the worm wheel 15 to the initial position Ps or the maximum rotation position Pm. Further, the engaging protrusion 32 is also a part for locking the second leg portion 33 c of the torsion coil spring 33. Since the second leg 33c of the torsion coil spring 33 is locked to the engaging protrusion 32 outside the stopper 31 in the protruding direction of the stopper 31, the initial position Ps and the maximum rotation position Pm are set. In either case, the worm wheel 15 is not sandwiched between the engaging protrusion 32 and the stopper 31.

As shown in FIG. 1, the case 11 is provided with a stepped cylindrical support 16 protruding from the bottom surface on the left side of the rotating shaft 12a in the drawing. A substantially T-shaped release lever 17 is rotatably supported by the support portion 16. The release lever 17 has an input arm 17a that extends in the radial direction from the support portion 16 toward the worm wheel 15 and can contact the outer surface of the shaft portion 15a and the cam portion 15b. The release lever 17 has an output arm 17b extending from the support portion 16 in the radial direction downward in the figure. The tip end of the output arm 17b is exposed to the outside of the case 11. As shown in FIG. 1, when the worm wheel 15 is at the initial position Ps, the input arm 17a is in contact with the outer surface of the shaft portion 15a. For example, when the worm wheel 15 rotates in the clockwise direction shown in the figure against the biasing force of the torsion coil spring 33 from the initial position Ps, the input arm 17a is guided to the cam portion 15b. Thereby, the release lever 17 rotates in the illustrated clockwise rotation direction. Then, as shown in FIG. 3, the release lever 17 rotates in the illustrated clockwise direction in conjunction with the rotation of the worm wheel 15 until the worm wheel 15 reaches the maximum rotation position Pm.

As shown in FIG. 1, a latch mechanism 21 is installed on the vehicle door via an appropriate bracket. The latch mechanism 21 includes a latch 22 and a pawl 23 that are rotatably connected to a bracket around axes parallel to each other. The latch mechanism 21 can be engaged with and disengaged from the striker 20 fixed to the vehicle body (not shown). That is, when the vehicle door is closed, the latch 22 pressed by the striker 20 rotates and engages with the striker 20, and at the same time, the pawl 23 prevents the latch 22 from rotating, thereby holding the vehicle door in a closed state. . Further, as shown in FIG. 3, when the worm wheel 15 is rotated by the driving force of the electric motor 12, the flange-like engagement piece 23a of the pole 23 is pressed by the output arm 17b of the release lever 17 interlocked therewith. The pole 23 rotates to release the latch 22 from rotating. As a result, the latch 22 is urged by a latch return spring (not shown) and rotates so as to return to the release position, and the engagement state with the striker 20 is released to make the vehicle door openable. At this time, the latch 22 is in a posture capable of engaging with the striker 20 when the vehicle door is closed. When released from the driving force of the electric motor 12, the worm wheel 15 is urged by the torsion coil spring 33 to rotate back to the initial position Ps. Along with this, the pole 23 released from the pressing force of the release lever 17 in the engagement piece 23a is urged by a pole return spring (not shown) and rotates so as to return to the position shown in FIG. As the pole 23 returns and rotates, the output arm 17b is pressed by the engagement piece 23a. Thereby, the release lever 17 with which the input arm 17a is engaged with the cam portion 15b rotates so as to return to the position shown in FIG.

Next, the assembly mode of this embodiment will be described.

As shown in FIG. 5A, first, the coil portion 33a of the torsion coil spring 33 in the elastic return state (free state) is radially inward of the stopper 31 around the axis of the support portion 14 of the case 11. It is disposed coaxially with the support portion 14 and is accommodated in the case 11. The first leg 33 b is locked to the end surface 31 b of the stopper 31. At this time, the tip of the coil portion 33 a of the torsion coil spring 33 is disposed outside the stopper 31 in the protruding direction of the stopper 31. The second leg portion 33 c is disposed near the end surface 31 b of the stopper 31 and on the outer side of the stopper 31 in the protruding direction of the stopper 31.

Subsequently, as shown in FIG. 5 (b), the shaft portion 15a of the worm wheel 15 is inserted into the tip portion 14b of the case 11, and the protruding portion of the second leg portion 33c outward from the stopper 31 is engaged. Instead, the engaging protrusion 32 of the worm wheel 15 is generally locked to the second leg 33c. At this time, the second end surface 32 a of the engagement protrusion 32 abuts on the first end surface 31 c of the stopper 31.

In this state, the worm wheel 15 is rotated around the axis of the tip end portion 14b in the clockwise direction in the figure against the urging force of the torsion coil spring 33. At this time, the first end surface 31 c of the stopper 31 abuts on the second end surface 32 a of the engaging protrusion 32 to guide the assembly of the worm wheel 15. The engaging protrusion 32 slides on the stopper 31, that is, on the first end surface 31 c. Then, when the worm wheel 15 rotates to a position where the engaging protrusion 32 gets over the stopper 31, that is, a position corresponding to the initial position Ps, the worm wheel 15 is moved in the axial direction toward the base end of the support portion 14. . Then, by further inserting the shaft portion 15a of the worm wheel 15 into the tip portion 14b of the case 11, the worm wheel 15 is placed on the step 14a. At this time, as shown in FIG. 5 (c), the engagement protrusion 32 abuts against the end surface 31a of the stopper 31 in the circumferential direction in such a manner that the engagement margin between the second leg portion 33c and the engagement protrusion 32 is increased. Touch. The worm wheel 15 is disposed at the initial position Ps with the torsion coil spring 33 interposed, and the assembly of the worm wheel 15 to the case 11 is completed.

Next, the operation of this embodiment will be described.

First, as shown in FIG. 1, the striker 20 and the latch mechanism 21 are engaged with each other, the vehicle door is held in a closed state, and the worm wheel 15 released from the driving force of the electric motor 12 is moved to the initial position Ps. It shall be arranged in. When the worm 13 is rotated by the electric motor 12 in this state, the worm wheel 15 rotates in the clockwise direction in the figure against the urging force of the torsion coil spring 33. When the release lever 17 rotates in the clockwise direction in the figure in conjunction with the rotation of the worm wheel 15, the output arm 17b presses the engagement piece 23a of the pole 23 as shown in FIG. As a result, the pole 23 is rotated to release the latch 22 from being rotated. Then, the latch 22 is urged by a latch return spring (not shown) and rotates so as to return to the release position, and the engagement state with the striker 20 is released to make the vehicle door openable. At this time, the rotation of the worm wheel 15 is restricted by the engagement protrusion 32 coming into contact with the end surface 31 b of the stopper 31. Therefore, the worm wheel 15 is disposed at the maximum rotation position Pm.

Thereafter, when released from the driving force of the electric motor 12, the worm wheel 15 is urged by the torsion coil spring 33 and rotates so as to return in the counterclockwise direction shown in the drawing. At this time, the rotation of the worm wheel 15 is restricted by the engagement protrusion 32 coming into contact with the end surface 31 a of the stopper 31. Therefore, the worm wheel 15 is disposed at the initial position Ps. Accordingly, the pole 23 released from the pressing force of the release lever 17 is urged by a pole return spring (not shown) and rotates so as to return to the rotation position shown in FIG.

As described in detail above, according to the present embodiment, the following effects can be obtained.

(1) The worm wheel 15 is assembled to the case 11 with a torsion coil spring 33 interposed therebetween. In this case, first, the torsion coil spring 33 is temporarily assembled to the case 11 in a state where the first leg portion 33 b of the torsion coil spring 33 is engaged with the end surface 31 b of the case 11. At this time, the torsion coil spring 33 is accommodated in the case 11 in an elastic return state (free state), and the second leg portion 33 c is disposed outside the stopper 31 in the protruding direction of the stopper 31. Subsequently, the second leg portion 33 c is locked to the engagement protrusion 32 by the engagement margin of the protruding portion of the second leg portion 33 c outward from the stopper 31. Then, the worm wheel 15 is rotated against the biasing force of the torsion coil spring 33 to a position where the engaging protrusion 32 gets over the stopper 31, that is, a position corresponding to the initial position Ps. In this state, when the worm wheel 15 is moved in the axial direction toward the bottom surface of the case 11, the engagement protrusion 32 is increased while increasing the engagement margin of the second leg portion 33 c and the engagement protrusion 32. It contacts the end face 31a of the stopper 31 in the circumferential direction. The worm wheel 15 is disposed at the initial position Ps with the torsion coil spring 33 interposed, and the assembly of the worm wheel 15 to the case 11 is completed. Even after the worm wheel 15 is assembled, the second leg portion 33 c is disposed outside the stopper 31 in the protruding direction of the stopper 31. Thus, the assembly of the worm wheel 15 to the case 11 can be performed smoothly. Further, since it is not necessary to set a gap between the members in order to facilitate the assembly work of the members such as the worm wheel 15, it is possible to suppress the occurrence of rattling and abnormal noise resulting therefrom. .

(2) The stopper 31 is also used as a stopper for restricting the worm wheel 15 to a predetermined maximum rotation position Pm. Thereby, for example, the case 11 can be made a simpler shape as compared with the case where the stopper for the initial position Ps and the stopper for the maximum rotation position Pm are individually provided.

(3) When the stopper 31 restricts the worm wheel 15 to the maximum rotation position Pm, the second leg 33c is locked to the engaging protrusion 32 outside the stopper 31 in the protruding direction of the stopper 31. Yes. Therefore, when the stopper 31 restricts the worm wheel 15 to the maximum rotation position Pm, the second leg 33c can be prevented from being sandwiched between the stopper 31 and the engaging protrusion 32 in the circumferential direction, and the second leg 33c Deterioration can be suppressed.

(4) An extremely simple stopper structure that restricts the rotation of the worm wheel 15 (engagement protrusion 32) by the stopper 31 of the case 11 can be adopted.

(5) When the worm wheel 15 is assembled to the initial position Ps together with the torsion coil spring 33, the first end surface 31c of the stopper 31 abuts on the second end surface 32a of the engaging projection 32 to guide the assembly. Therefore, the assembling property of the worm wheel 15 and the torsion coil spring 33 can be improved.

(6) The first end face 31 c of the stopper 31 has an arc shape centered on the rotational axis of the worm wheel 15. Therefore, if the worm wheel 15 is rotated and assembled, the second end surface 32a can be brought into contact with the first end surface 31c without fail. Therefore, the assembling property of the worm wheel 15 and the torsion coil spring 33 can be further improved.

Note that the above embodiment may be modified as follows.

The stopper 31 may restrict the rotation of the worm wheel 15 only at the initial position Ps. In this case, a maximum rotation position stopper that restricts the worm wheel 15 to the maximum rotation position Pm may be separately provided at an appropriate position of the case 11. The stopper 31 that restricts the rotation of the worm wheel 15 only at the initial position Ps may be reduced in the circumferential direction. In this case, in the elastic return state (free state) of the torsion coil spring 33, the second leg portion 33c is engaged with the engaging protrusion 32 by the engagement margin of the protruding portion of the second leg portion 33c outward from the stopper 31. There is no wall portion (stopper 31) that can slide the engagement protrusion 32 when stopped.

The first leg 33b of the torsion coil spring 33 may be locked at an appropriate position of the case 11 other than the end face 31b of the stopper 31.

As long as the second leg portion 33c is disposed outside the stopper 31 in the protruding direction of the stopper 31, the configuration of each part in the above embodiment may be appropriately changed. For example, the coil portion 33a of the torsion coil spring 33 may be compressed in the axial direction after the worm wheel 15 is assembled.

Each of the first end surface 31c of the stopper 31 and the second end surface 32a of the engaging protrusion 32 is not limited to a so-called tip surface in the protruding direction. For example, a step surface may be formed at the tip of the stopper 31 or the engaging protrusion 32.

The output member is not limited to the worm wheel 15 constituting the worm gear, and may be an appropriate gear or lever driven by the electric motor 12.

The present invention may be applied to a closer device that drives the latch mechanism 21 to hold the vehicle door in a closed state. Alternatively, the present invention may be applied to an appropriate device that performs a required operation by rotating the output member against the biasing force of the torsion coil spring by the driving force of the electric motor.

Claims

Case and
An output member rotatably accommodated in the case and rotated by an electric motor;
A stopper provided in the case so as to extend in the protruding direction;
An engaging protrusion that protrudes from the output member and restricts the output member to a predetermined initial position by contacting the stopper;
A torsion coil spring housed in the case,
The torsion coil spring is provided at one end and locked to the case, and is provided at the other end and locked to the engaging protrusion outside the stopper in the protruding direction of the stopper. And an actuator that urges the output member in a direction in which the engagement protrusion comes into contact with the stopper.
The actuator according to claim 1, wherein
When the output member rotates from the initial position against the biasing force of the torsion coil spring by the driving force of the electric motor, the engagement protrusion is positioned on the opposite side of the initial position in the circumferential direction of the stopper. The stopper restricts the output member to a predetermined maximum rotation position by contacting the stopper.
The actuator according to claim 2, wherein
The stopper has an initial position side end surface that restricts the output member to the initial position, and a maximum rotation position side end surface that restricts the output member to the maximum rotation position,
The first leg is an actuator locked to the second end surface of the stopper.
The actuator according to any one of claims 1 to 3,
The stopper has a first end surface formed at a distal end portion in the protruding direction of the stopper, and the engaging protrusion has a second end surface formed at the distal end portion in the protruding direction of the engaging protrusion. The first end surface is an actuator configured to guide assembly of the output member by contacting the second end surface when the output member is assembled to the initial position together with the torsion coil spring.
The actuator according to claim 4, wherein
The first end surface is an actuator having an arc shape centering on a rotation axis of the output member.
The actuator according to any one of claims 1 to 5,
When the stopper restricts the output member to the maximum rotation position, the second leg portion is locked to the engagement protrusion outside the stopper in the protruding direction of the stopper.