JPH08303549A - Actuator - Google Patents

Abstract

PURPOSE: To provide a small and light actuator which can transmit the drive force of a motor to an output member smoothly in a well-balanced state. CONSTITUTION: Spring grooves 59 are formed on rotary members 16, 17, 18 and coil springs 58 are arranged therein. The rotary members 16, 17, 18 are rotated along guide parts formed on a storing member 11. When the rotary members 16, 17, 18 are rotated, the guide parts enter the spring grooves 59 and the coil springs 58 are compressed. In short, the rotary members 16, 17, 18 can be rotated in either normal/reverse direction against the energizing force of the coil springs 58. The drive force of a motor 12 stored in the storing member is transmitted to the rotary members 16, 17, 18 through a motor gear 43, a large diameter gear 13, a small diameter gear 14 and a planet gear 15 and the transmitted drive force is outputted to an output shaft 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator used in a vehicle door lock mechanism or the like.

[0002]

2. Description of the Related Art Conventionally, as an actuator used for a door lock mechanism of an automobile, for example, FIG.
There is one shown in (b) (see JP-A-2-256767).

This actuator is provided in the holder 1,
A large-diameter gear 3 that rotates forward and backward when driven by a motor 2 and a motor gear 2a provided on the rotation shaft of the motor 2 and are driven by the motor 2 to rotate integrally with the large-diameter gear 3. A small-diameter gear 4, a pair of planet gears 5a and 5b meshing with the small-diameter gear 4, and a planetary gear 5a meshing with one of the planetary gears 5a to rotate about a shaft portion 6a so that a door lock mechanism (not shown) is formed. The driven gear 6 for driving is accommodated. In addition, 7a and 7b are arm parts.

According to this actuator, when the motor 2 is driven, the large-diameter gear 3 and the small-diameter gear 4 rotate via the motor gear 2a, and the planetary gears 5a and 5b rotate accordingly, and the arm portion 7a, It moves by pressing against 7b. When one planetary gear 5a meshes with the driven gear 6, the driven gear 6 rotates about the shaft portion 6a and drives the door lock mechanism.

[0005]

However, in the above-mentioned conventional actuator, the planetary gears 5a and 5b are connected to the arm portion 7.
Since the position is moved while being pressed against a and 7b, the resistance is large and smooth operation cannot be expected.
Further, since the driven gear 6 is arranged in substantially the same plane with respect to the planet gears 5a and 5b, and the motor 2 projects in the direction orthogonal to these, the occupied space and weight are increased and However, there is a problem of poor weight balance.

In view of the above-mentioned problems, it is therefore an object of the present invention to provide a small and lightweight actuator capable of smoothly transmitting a driving force of a motor to an output member in a well-balanced manner.

[0007]

To achieve the above object, in the present invention, a housing member having a motor housing chamber and a gear housing chamber, a motor housed in the motor housing chamber,
A gear that is accommodated in the gear accommodating chamber and that responds to the rotation of the motor, and a rotating member that has a spring groove formed in an arc shape and that responds to the rotation of the gear, and is accommodated in the spring groove. A coil spring, a guide portion arranged at both ends of the coil spring for urging the rotating member to a neutral position, and an output projecting from the gear accommodating chamber and rotating in response to rotation of the rotating member. And an axis.

The spring groove of the rotating member is formed by spring guide portions which are erected at a predetermined interval, and is extended toward the inner side of the spring guide portion located on the outer side so as to prevent the coil spring from falling off. It is preferable to provide a stop.

Further, it is preferable to have an action knob which rotates with a play of a predetermined angle with respect to the rotation of the rotating member, and the output shaft rotates integrally with the action knob.

[0010]

In the invention of the above structure, when the motor is driven, the output member is rotated by rotating the rotating member via the gear. When the motor stops, the urging force of the coil spring returns the rotating member to the neutral position.

In the invention having a structure in which the spring guide portion located outside the rotating member has a retaining portion, the coil spring is guided by the retaining portion when the rotating member rotates, vibrates, or moves from the spring groove. It does not stick out.

In the invention having the action knob, when the motor is stopped, the rotating member is returned to the neutral position by the urging force of the coil spring, and only the action knob is rotated by the operation from the output shaft side. To do.

[0013]

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

FIG. 1 shows an actuator 10 according to this embodiment.
FIG. This actuator 10
Accommodates the motor 12, the large-diameter gear 13, the small-diameter gear 14, the planetary gear 15, and the like, and the mounting base 16, the rotary base 17, the action knob 72, and the like, which are the rotating members, in the holder 11 which is the containing member. This is a configuration in which the output shaft 18 is projected to the outside.

The holder 11 is composed of a pair of upper and lower holders 11a and 11b.

As shown in FIG. 2, the first holder 11a has a motor accommodating chamber 19 and a gear accommodating chamber 20. At the upper edge of one end wall of the motor accommodating chamber 19, a plurality of harness insertion portions 19 are formed so as to have a recess 19a in the central portion.
b is formed, and a holding table 21 is provided below.
Further, a cutout portion 22 is formed in the other end wall of the motor housing chamber 19 so that the motor housing chamber 19 and the gear housing chamber 20 communicate with each other. The slit portion 2 is provided on one side wall of the motor housing chamber 19.
3 is formed in which a posistor 24 (see FIG. 1) is arranged. The posistor 24 is for preventing the heat generation of the motor 12, and receives the heat generation of the posistor 24 itself or the heat generation of the motor 12 due to the overcurrent, and limits the current to the motor 12.

On the other hand, a through hole 25 is formed in the center of the bottom surface of the gear accommodating chamber 20, and recesses 27 for accommodating steel balls 26 (see FIG. 1) are provided at three locations around the through hole 25. Inner teeth 28 are formed on the inner peripheral surface of the side wall.
The steel ball 26, which is accommodated in the recess 27, slightly protrudes from the bottom surface of the gear accommodating chamber 20 and comes into point contact with the large-diameter gear 13 accommodated in the gear accommodating chamber 20 as described below. As a result, the sliding resistance when the large diameter gear 13 rotates is suppressed and the load is not applied to the output shaft 18, so that the rotation becomes smooth. Further, the dimensional accuracy is not so required, and the engagement between the large-diameter gear 13 and the motor gear 43 described below becomes smooth.

A protrusion 29 is formed on the first holder 11a along the outer edge thereof. Further, locking claw portions 85 may be extended laterally at the lower ends of both side walls of the first holder 11a, for example, as shown in FIG.
The locking claw portion 85 includes a pair of locking claws 86 and 87 and a holding recess 88 formed between the locking claws 86 and 87. The inside of one of the locking claws 86 (on the side of the locking claw 87)
By forming the slit 89 in the base portion, the locking claw 86 can be elastically deformed inward.

As shown in FIG. 3, the second holder 11b has a substantially plate shape that closes the upper opening of the first holder 11a, and corresponds to the protrusion 29 of the first holder 11a along the outer edge thereof. The groove portion 30 is formed at the position. A concave portion 32 is formed in the rectangular portion 31a that covers the motor housing chamber 19 so that the groove portion 30 communicates with the central portions on both sides. Also, a circular portion 31b that covers the gear accommodating chamber 20.
The cylindrical shaft portion 33 is provided in the center of the groove, and the arcuate guide portions 34a and 34b symmetrically arranged with respect to the longitudinal center line passing through the bearing portion 33 are provided inward of the groove portion 30, respectively. . Three thin plate-shaped terminal terminals 35a, 35b, 35c are fixed around the cylindrical shaft portion 33, and a stopper portion 36 is provided on one end side (rectangular portion 19a side) of the guide portion.
a and 36b are provided.

As shown in FIG. 1, a sealing member 37 is engaged with and integrated with the groove 30 and the recess 32. The sealing member 37 includes an outer edge sealing portion 38 that engages with the groove portion 30 and a motor pressing portion 39 that engages with the recess 32. On one end side of the outer edge sealing portion 38, the harness pressing portion 38 located in the recess 19a of the first holder 11a.
a is formed. In addition, a cushion portion 40 is provided inwardly in the arc portion 38b of the outer edge sealing portion 38 in the vicinity of the straight portion 38c. This cushion part 4
0 bulges in a mountain shape in the circumferential direction of the circular arc portion 38b, and plays a role of alleviating the impact when the rotary table 17 described below rotates and its spring receiving portion 61 abuts. Further, the outer edge sealing portion 38 has one of the central portion (the groove portion 3).
It has a substantially V-shaped cross section protruding toward the 0 side). The motor pressing portion 39 directly contacts the motor 12 and
It plays the role of absorbing the noise and vibration generated from 2. It should be noted that the motor pressing portion 39 has three protrusions 39a on the pressing surface side.
Is formed, and the motor 12 can be held securely.

As shown in FIG. 1, the motor 12 has a structure in which a bearing portion 41 (one of which is not shown) provided at both ends supports a rotary shaft 42 projecting toward the front end side.
A motor gear 43 is attached to the. The motor gear 43 is, for example, as shown in FIG. 4, made of stainless steel having a notch 43b at the center of each tooth 43a (SU.
The curved bevel gear of S304) can be used.
Since the motor gear 43 is fixed to the thin rotary shaft 42 of the motor 12 by press fitting, the motor gear 43 is formed of a metal material to improve durability. The motor 12 has a rotating shaft 42.
The motor gear 43 is attached to the motor holder chamber 19 of the first holder 11a. The motor 12 accommodated in the motor accommodating chamber 19 has the bearings 41 held by the holder 21 and the notch 22. In this state, the motor gear 43 is positioned on the gear accommodating chamber 20 side.

The large-diameter gear 13 is made of synthetic resin (for example, Duracon), as shown in FIG.
The motor gear 43 is composed of a curved bevel gear similar to that of the motor gear 43. Then, the spiral tooth portion 44 formed on the outer peripheral edge portion
Is a motor gear 43 provided on the rotary shaft 43 of the motor 12.
It meshes with and forms a speed reduction mechanism. Further, the central portion of the large-diameter gear 13 projects slightly, and an engaging hole 46 having engaging internal teeth 45 is formed in the center thereof, and the flat bearing between the spiral tooth portion 44 and the engaging hole 46 is formed. A ring-shaped protruding portion 47 that slightly protrudes is provided in the portion. The ridges 47 are provided in order to reduce the contact area with the mounting base 16 described below and to smoothly rotate them.

The small-diameter gear 14 is, as shown in FIG.
A spur gear formed by sintering is applicable. The small-diameter gear 14 has a through hole 50 formed in the center thereof, and each tooth portion 48 has a small-diameter portion 49 having a small outer diameter on the lower side.
The small-diameter gear 14 has its small-diameter portion 49 inserted through the engagement hole 46 of the large-diameter gear 13 in a press-fitted state without rattling, and each tooth portion 48 is meshed with the engaging internal teeth 45. The large-diameter gear 13 is designed to rotate integrally with the large-diameter gear 13. That is, the small-diameter gear 14 can be easily prevented from rotating with the large-diameter gear 13 by simply engaging the small-diameter portion 49 with the engaging internal teeth 45 of the large-diameter gear 13. Also, the small diameter portion 4
The height dimension when integrated with the large diameter gear 13 can be easily set to a desired value only by limiting the forming range of 9. Moreover, the mold structure required for forming the small-diameter gear 14 is simple, and there is no post-processing that is difficult for the sintered material, and the manufacturing cost can be reduced.

The planetary gear 15 is made of synthetic resin,
As shown in FIG. 1, it is composed of a pair of spur gears mounted on the mount 16. A recess 51 is formed from the upper surface side in the center of each planetary gear 15, and an insertion hole (not shown) is formed in the center thereof.

As shown in FIG. 1, the mounting base 16 is substantially fan-shaped, has an insertion hole 52 through which the small diameter gear 14 is inserted at the center of the arc, and the shaft portion 53 is projected from three locations on the arc-side upper surface. It has been configured. Then, of the shaft portion 53,
Two parts on both sides are inserted into the insertion holes of each planetary gear 15 and project into the recess 51.

As shown in FIGS. 7 (a) and 7 (b), the rotary table 17 has a substantially disk shape and is composed of a large diameter portion 54 and a small diameter portion 55.

On one surface of the turntable 17, as shown in FIG. 7A, the first guide portion 5 is provided along the outer edge of the large diameter portion 54.
6 is projected, and the second guide part 57 is projected inside the first guide part 56 at a predetermined interval, whereby a return spring 58 (see FIG. 1) is arranged between the two. 59 are formed. A retaining portion 60 extends inward at the center of the upper surface of the first guide portion 56. Spring receiving portions 61 are formed at both ends of the first guide portion 56 and the second guide portion 57 so as to extend inward, and guide grooves for moving the guide portions 34a and 34b of the second holder 11b are formed between the spring receiving portions 61. It is 62.

An annular bearing portion 63 is provided at the center of the small diameter portion 55, and the second holder 11b is provided on the inner periphery of the annular bearing portion 63.
The annular shaft portion 33 is positioned. Further, arcuate holes 64 are bored along the outer peripheral surface at symmetrical positions on both sides of the annular bearing portion 63, and arcuate walls 65 are protruded at positions orthogonal to these holes. An insulating plate 66 is rotatably arranged around the arc wall 65.

As shown in FIG. 1, the insulating plate 66 is formed by molding a synthetic resin material into an annular shape, and a pair of protrusions 67 and 68 are provided at symmetrical positions on the front and back surfaces, respectively. Then, the contact plate 69 is integrated with the one surface by the projection 67, and the action knob 72 is integrated with the other surface by the projection 68.

As shown in FIG. 1, the contact plate 69 is an annular thin plate having conductivity and spring properties. Through holes 70 that engage with the protrusions 67 are formed in the contact plate 69 at symmetrical positions,
Contact points 71 that come into contact with the terminal terminals 35a, 35b, and 35c are formed by bulging at positions orthogonal to these. And the contact plate 69
The terminal terminals 35a and 35b or 35b and 35c are connected depending on the rotational position of the. Further, the contact plate 69 is bent so as to be most protruded at the contact 71.

As shown in FIG. 1, the action knob 72 has a substantially elliptical shape, an elliptical hole 73 is formed in the central portion, and bulging portions 74 are extended from both ends in the longitudinal direction. There is. The bulging portion 74 has a fan shape that makes a predetermined angle from the center of the ellipse, and a notch portion 75 is formed in the center of the bulging portion 74 to which the protrusion 68 of the insulating plate 66 is locked.

On the other hand, on the other surface of the rotary base 17, as shown in FIG. 7B, a cylindrical portion 76 with which the large diameter portion 54 is engaged with the respective shaft portions 53 formed on the mounting base 16. , 77 are formed respectively. However, the central cylindrical portion 77 is formed in a substantially triangular shape so that the planet gears 15 do not interfere with each other during assembly.

In the small diameter portion 55, the bulging portion 74 of the action knob 72 is located in the circular arc hole 64 with the action knob 72 being in contact with the annular bearing portion 63, and the circular arc hole 64 is also present. Is formed in a wider angle range than the bulging portion 74, so that a so-called play is formed in which the action knob 72 freely rotates within a predetermined angle range.

The notch 75 of the action knob 72 is engaged with the projection 68 of the insulating plate 66 protruding through the arcuate hole 64 so that the two rotate integrally. In addition, 78 is a waterproof O
It is a ring.

As shown in FIG. 1, the output shaft 18 is a metal rod having a flange 18a formed at the upper end and a substantially rectangular notch at the lower end. The lower end of the output shaft 18 is
The output lever 79 is integrated through the O-ring 78 at a position where the output lever 79 is inserted through the through hole 50 of the small-diameter gear 14 and protrudes from the bottom surface of the lower holder 11a. An action knob 72 is engaged with the upper end flange portion 18a of the output shaft 18 to rotate integrally therewith.

A tight screw 80 is used when the upper holder 11b is attached to the lower holder 11a. Further, 81 is a wire harness, which is a motor 12,
It is composed of a posistor 24, a terminal terminal 35b, and an electric wire 81a connected to either one of the terminal terminals 35a or 35c.

Actuator 1 composed of the above-mentioned components
0 is assembled as follows.

First, the small diameter portion 49 of the small diameter gear 14 is inserted into the engagement hole 46 of the large diameter gear 13 to integrate them. In addition, the action knob 72 is arranged in the circular arc recess 77 of the rotary table 17, and the projection 68 of the insulating plate 66 is projected from the opposite side through the circular arc hole 64 to be locked in the cutout portion 75 of the action knob 72. To integrate them. In this state, the action knob 72 is rotatable within the arc hole 64 within a range of a predetermined angle, and so-called play is formed. Further, a contact plate 69 is integrated with the insulating plate 66 by a protrusion 67.

After mounting the planetary gear 15 on the mounting base 16 so that the shaft portions 53 at both ends of the mounting base 16 are inserted into the insertion holes of the planetary gear 15, the tubular portion 7 of the rotary base 17 is placed.
By engaging 6, 77 with the shaft portion 53 in the recess 51 of the planetary gear 15, the planetary gear 15 is held rotatably by the mounting base 16 and the rotary base 17.

Then, the steel ball 26 is placed in the recess 27 of the gear accommodating chamber 20 of the first holder 11a, and the large diameter gear 13 and the small diameter gear 14 are accommodated so that the small diameter gear 14 projects upward. In this state, the large diameter gear 13
Is rotatably supported by the steel balls 26 at only three points, and the frictional resistance is reduced.

Next, the motor 12 is housed in the motor housing chamber 19 of the first holder 11a together with the posister 24, with the motor gear 43 attached to the rotary shaft 42 thereof.
At this time, since the large-diameter gear 13 is supported by the steel balls 26 and can rotate in a stable state as described above, the motor gear 43 and the spiral tooth portion 44 of the large-diameter gear 13 are reliably meshed with each other. Will be obtained.

The output shaft 18 is inserted through the through hole 50 of the small-diameter gear 14, and the lower end of the output shaft 18 is projected from the lower surface of the first holder 11a. At this time, the upper end flange portion 18a of the output shaft 18 contacts the upper surface of the small-diameter gear 14 to prevent further insertion. Therefore, the output lever 79 is integrated with the lower end of the output shaft 18 via the O-ring 78.

Then, the planetary gear 15 held by the mounting base 16 and the rotary base 17 is housed in the gear housing chamber 20 of the first holder 11a. At this time, the planetary gear 15 meshes with the small-diameter gear 14 and the internal teeth 28 of the gear accommodating chamber 20. Further, the collar portion 18a of the output shaft 18 is attached to the mounting base 16
Through the through hole 52 of the through hole 73 of the action knob 72
Engage with. Then, the spring groove 5 of the rotary table 17
A return spring 58 is provided at 9 (see FIG. 9A).

Finally, in advance, the terminal terminals 35a, 35
After the sealing member 37 is attached to the groove 30 on the second holder 11b to which b and 35c are fixed, the upper opening of the first holder 11a is closed by this second holder 11b, and the tight screw 80 is used to Are integrated (see FIG. 9B). In this case, the rotary table 17 needs to be positioned in a neutral position, that is, in the central portion with respect to both guide portions 34a and 34b of the second holder 11b. Further, the motor 12, the posistor 24, the terminal terminals 35a, 35
It is necessary to bundle the wire harness 81 composed of the electric wires 81a connected to b and 35c at one end of the holder 11.

Since the rotary table 17 is formed with the retaining portion 60, the return spring 58 is not likely to come off even if it is housed in the spring groove 59 before the rotary table 17 is assembled. .

The actuator 1 thus completed
0 can be applied to the door lock mechanism 90 shown in FIG. 10, for example. That is, the door lock mechanism 90 has a conventionally well-known structure in which a plurality of levers 92, 93 and the like are rotatably attached to a base plate 91, and each lever 93 and the like is rotated by operating an outer or inner handle (not shown). The door can be opened by moving.
Also, a key (not shown) or inner lock knob 9
By operating 4, the lever 92 or the like can be rotated to bring the door into a locked state or an unlocked state.

A holding portion 95 is provided from the base plate 91.
Are extended, and locking receiving claws 96 each having a substantially L-shaped cross section are formed so as to be bent from both sides in a direction in which the leading edge portions approach each other.

The actuator 10 having the locking claw portion 82 can be mounted on the holding portion 95 of the base plate 91 as follows. That is, the bottom side of the first holder 11a is slid on the holding portion 96 as shown by the arrow in FIG. As a result, the locking claw 86 of the actuator 10 comes into contact with the locking receiving claw 96 and elastically deforms inward, and when the locking receiving claw 96 engages with the holding recess 88, it elastically returns to the locked state. It is formed. Then, by connecting the output lever 79 and the lever 92 with the operation lever 97, the operation of the actuator 10 can be transmitted to the door lock mechanism 90.

Next, the actuator 1 having the above structure
The operation of 0 will be described.

When the motor 12 is driven to rotate the rotary shaft 42 in the forward direction, the large diameter gear 13 and the small diameter gear 14 rotate in the same direction, and the two planetary gears 15 meshing with the small diameter gear 14 accordingly rotate. Start. The planet gear 15 is a small-diameter gear 14.
Since it also meshes with the inner teeth 28 of the first holder 11a, the meshing position with respect to the inner teeth 28 changes.

By the movement of the planetary gears 15, the rotary table 1
7 is a mounting base 1 against the biasing force of the return spring 58.
Rotate with 6. At this time, the return spring 58
Has a retaining portion 60 extending inward from the first guide portion 56 on the outer side of the rotary table 17, so that the return spring 58 dances to cause so-called undulation, or is bent outward to bend the return spring 58. Does not come off. In addition, as described above, the circular arc concave portion 77 of the rotary table 17
Since a predetermined play is formed between the action knob 72 and the action knob 72, the rotation of the action knob 72 is started after the motor 12 is driven and the turntable 17 is rotated by a predetermined dimension.

When the action knob 72 rotates, the output shaft 18 integrated with the action knob 72 rotates, and the lever 92 constituting the door lock mechanism 90 of the automobile rotates via the output lever 79 and the operation lever 97. Then, the door lock state is released.

After the door lock state is released, if the driving of the motor 12 is stopped, the rotary base 17 is automatically returned to the neutral position by the urging force of the return spring 58.

When the motor 12 is driven to rotate the rotary shaft 42 in the reverse direction, the large diameter gear 13, the small diameter gear 14, the planetary gear 15, the rotary base 17, and the action knob 7 are processed in the same manner as described above.
2, the door lock mechanism is driven through the output shaft 18, the output lever 79, and the operation lever 97, and the door locked state is formed.

The actuator 10 can be selectively used for the right and left door lock mechanisms. When used for the right, the wire harness 81 is connected to the terminal terminals 35a and 35b, and 35c. Not connected to. When it is used for the left side, the wire harness 81 includes the terminal terminals 35b and 35b.
It is connected to c and not to 35a.

When the door lock mechanism 90 is in the locked state, the contact 71 of the contact plate 69 causes the wire harness 81 of the terminal terminals 35a or 35c.
Touch the terminal that is not connected to
An energizing circuit is not formed between b and 35a or 35c, and when the door lock mechanism 90 is in the unlocked state, the contact 71 of the contact plate 69 is connected to the wire harness 81 of the terminal terminals 35a or 35c. 3b and 3
An energizing circuit is formed between 5a and 35c, and it is possible to determine whether the door lock mechanism 90 is in the door locked state or the door unlocked state.

By providing a circuit for controlling the motor 12, the motor 12 can be operated when the door is locked.
Can be driven to rotate the rotary shaft 42 in the forward direction to unlock the door, and when the door is unlocked, the motor 12 can be driven to rotate the rotary shaft 42 in the reverse direction to lock the door.

Further, since the output shaft 18 serves as the support shaft of the gear 14, the number of parts is reduced accordingly, and the lower holder 11a passes through the rotation center position of the large diameter gear 13.
Since it is projected from the bottom surface of the output shaft 18, the output lever 79 integrated with the output shaft 18 does not protrude from the bottom surface of the lower holder 11a, and an efficient space can be secured.

Further, when the lever 92 is rotated by manually operating the inner lock knob 94 or the like, the door can be locked or unlocked, as described above.
In this case, because of the play, in the door lock actuator 10, only the output shaft 18 and the action knob 72 are rotated via the operation lever 97 and the output lever 79, and an extra force is required to operate the inner lock knob 94 and the like. Is never required.

The actuator 10 can be used for moving a predetermined angle such as a lever mechanism of a heater control device or for moving a predetermined amount.

[0061]

As is apparent from the above description, according to the present invention, the spring groove is formed in the rotating member, the coil spring is accommodated in the spring groove, and the guide portions are arranged at both ends of the coil spring. Then, the rotating member is biased to the neutral position, and the rotating member is rotated against the biasing force of the coil spring, so that the operation of the rotating member can be made smooth, and
The rotating member can be reliably returned to the neutral position.

According to the invention in which the spring guide portion of the rotating member has the retaining portion, the coil spring does not vibrate or protrude from the spring groove when the rotating member rotates, and a smooth rotating state can be obtained. You can

Further, according to the invention having the action knob, the rotating member can be always returned to the neutral position by the biasing force of the coil spring by turning off the motor, and the operation from the output shaft side is possible. Depending on the case, only the action knob operates, so that the operation can be smoothly performed when the output shaft side is connected to, for example, the inner lock knob of the automobile.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an actuator according to this embodiment.

FIG. 2 is a plan view of the first holder shown in FIG.

FIG. 3 is a plan view of the second holder shown in FIG.

FIG. 4 is a sectional view of the motor gear shown in FIG.

5 is an enlarged perspective view of the large-diameter gear shown in FIG.

6 is a partial cross-sectional front view of the small diameter gear shown in FIG.

FIG. 7 is a plan view (a) and a rear view (b) of the turntable shown in FIG.

8 is a plan view showing a rotating state of the turntable and the action knob shown in FIG. 1. FIG.

9 is a plan view (a) and a sectional view (b) showing an assembled state of the actuator shown in FIG.

FIG. 10 is a perspective view showing an example of a door lock mechanism to which the actuator according to the present embodiment is applied.

FIG. 11 is a plan view (a) and a sectional view (b) of an actuator according to a conventional example.

[Explanation of Codes] 11 Holder (accommodating member) 12 Motor 13 Large diameter gear 14 Small diameter gear 15 Planetary gear 16 Mounting base (rotating member) 17 Rotating base (rotating member) 18 Output shaft 19 Motor accommodating chamber 20 Gear accommodating chamber 28 Tooth 34a, 34b Guide part 43 Motor gear 58 Return spring (coil spring) 60 Retaining part 72 Action knob

Claims (3)

[Claims] 1. An accommodating member having a motor accommodating chamber and a gear accommodating chamber, a motor accommodated in the motor accommodating chamber, a gear accommodated in the gear accommodating chamber and responsive to rotation of the motor, and an arc shape. A rotating member that has a spring groove formed in the spring and that responds to the rotation of the gear; a coil spring that is housed in the spring groove; and a coil spring that is disposed at both ends of the coil spring to position the rotating member in a neutral position. An actuator, comprising: a guide portion that urges the gear member into the gear housing chamber; and an output shaft that protrudes from the gear accommodating chamber and that rotates in response to rotation of the rotating member. 2. The spring groove of the rotating member is formed by spring guide portions which are erected at a predetermined interval, and is extended inward at the spring guide portion located outside to prevent the coil spring from falling off. The actuator according to claim 1, further comprising: 3. An action knob that rotates with a predetermined angle of play with respect to the rotation of the rotating member, and the output shaft rotates together with the action knob. The actuator according to Item 1 or 2.