JP3229513B2 - Actuator - Google Patents

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 door lock mechanism of an automobile and 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-2-256776).

[0003] This actuator is mounted in a holder 1
A motor 2 that can be driven forward and reverse, a large-diameter gear 3 that meshes with a motor gear 2 a provided on the rotating shaft of the motor 2 and rotates by driving the motor 2, and rotates integrally with the large-diameter gear 3. A small diameter gear 4, a pair of planetary gears 5 a and 5 b meshing with the small diameter gear 4, and a door lock mechanism (not shown) are meshed with one of the planetary gears 5 a and rotated about a shaft 6 a. And a driven gear 6 to be driven. 7a and 7b are arms.

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, 5b rotate accordingly, and the arm portions 7a, It moves by pressing against 7b. When one of the planetary gears 5a meshes with the driven gear 6, the driven gear 6 rotates about the shaft 6a to drive the door lock mechanism.

[0005]

However, in the conventional actuator, the planetary gears 5a, 5b are connected to the arm 7
Since the position is moved while being pressed against a and 7b, the resistance is large and a smooth operation cannot be expected.
In addition, the driven gear 6 is disposed substantially in the same plane with respect to the planetary gears 5a and 5b, and the motor 2 projects in a direction perpendicular to the driven gears 6, so that the occupied space and the weight are increased. However, there is a problem that weight balance is poor.

SUMMARY OF THE INVENTION In view of the above problems, it is 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 with a reduced resistance.

[0007]

In order to achieve the above object, according to the present invention, an actuator has a motor accommodating chamber and a gear accommodating chamber, and internal teeth are formed on an inner peripheral surface of the gear accommodating chamber. A housing member, a motor housed in the motor housing chamber, and a motor that is provided on a rotating shaft and protruding into the gear housing chamber; and a motor that is orthogonal to the rotating shaft of the motor and is disposed at the center of the gear housing chamber. An output shaft for projecting a part to the outside of the housing member, housed in the gear housing chamber,
A large-diameter gear that rotates about the output shaft and that meshes with the motor gear of the motor; and a coaxial gear provided with the large-diameter gear and is fixed to one surface of the large-diameter gear. A small-diameter gear that rotates in accordance with the above, meshes with the small-diameter gear and the internal teeth formed in the gear housing chamber on one surface of the large-diameter gear, and changes the meshing position with the internal teeth by the rotation of the small-diameter gear. A planetary gear to be engaged, a rotating member engaged with the planetary gear and rotating in the gear receiving chamber, and having a spring groove formed in an arc shape, for rotating the output shaft, and being accommodated in the spring groove. And a guide formed on the housing member and positioned at both ends of the coil spring to guide the rotating member rotatably in a rotating direction and to bias the rotating member to a neutral position via the spring. When it is obtained by a configuration with a.

[0008] The spring groove of the rotating member is formed by a spring guide portion erected at a predetermined interval, and is extended inward to the spring guide portion located on the outside to prevent the coil spring from falling off. Preferably, a stop is provided.

[0009] It is preferable that the apparatus further comprises an action knob which rotates with a play of a predetermined angle with respect to the rotation of the rotating member, and wherein the output shaft rotates integrally with the action knob.

[0010]

According to the invention having the above construction, when the motor is driven, the rotating member is rotated via the gear, whereby the output shaft is rotated. When the motor stops, the rotating member returns to the neutral position by the urging force of the coil spring.

[0011] In the invention having a structure in which the spring guide portion located outside the rotating member has a retaining portion, when the rotating member rotates, the coil spring is guided by the retaining portion, and vibrates or moves out of the spring groove. It does not protrude.

According to the invention having the action knob, when the motor stops, the rotating member returns to the neutral position by the urging force of the coil spring, and only the action knob rotates by an operation from the output shaft side. I 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.
1 shows an exploded perspective view of 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 as the rotating members in the holder 11 as the housing member. This is a configuration in which the output shaft 18 protrudes outside.

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

As shown in FIG. 2, the first holder 11a has a motor chamber 19 and a gear chamber 20. A plurality of harness insertion portions 19 are formed on the upper edge of one end wall of the motor accommodation chamber 19 so as to have a recess 19a at the center.
b is formed, and a holding table 21 is provided below.
A cut-out portion 22 is formed in the other end wall of the motor housing 19, and communicates with the motor housing 19 and the gear housing 20. The slit portion 2 is provided on one side wall of the motor accommodation chamber 19.
3 are formed, and a positive star 24 (see FIG. 1) is provided therein. The positive star 24 is for preventing heat generation of the motor 12, and receives heat generated by the positive star 24 itself or heat generated by the motor 12 due to an overcurrent, and limits 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 housing chamber 20, and a recess 27 for housing a steel ball 26 (see FIG. 1) is provided at three places around the through hole 25. Internal teeth 28 are formed on the inner peripheral surface of the side wall.
The steel ball 26 slightly protrudes from the bottom surface of the gear housing chamber 20 while being housed in the recess 27, and makes point contact with the large-diameter gear 13 housed in the gear housing chamber 20 as described below. Thereby, the sliding resistance when the large-diameter gear 13 rotates is suppressed, and no load is applied to the output shaft 18, so that the rotation is smooth. Further, the meshing between the large-diameter gear 13 and the motor gear 43 described below is smooth without requiring much dimensional accuracy.

The first holder 11a has a ridge 29 formed along the outer edge. Further, at the lower end of both side walls of the first holder 11a, for example, as shown in FIG. 10, a locking claw portion 85 may be extended sideways.
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. Then, the inside of one of the locking claws 86 (on the locking claw 87 side)
By forming the slit 89 in the base, the locking claw 86 can be elastically deformed inward.

As shown in FIG. 3, the second holder 11b has a substantially plate-like shape for closing the upper opening of the first holder 11a, and corresponds to the ridge 29 of the first holder 11a along the outer edge. A groove 30 is formed at the position. A recess 32 is formed in the rectangular portion 31a that covers the motor accommodating chamber 19 so that the groove 30 communicates at the center on both sides. A circular portion 31b covering the gear housing chamber 20;
, A cylindrical shaft portion 33 is provided at the center portion, and arc-shaped guide portions 34a and 34b which are symmetrical with respect to a longitudinal center line passing through the bearing portion 33 are protruded inside the groove portion 30, respectively. . Three thin plate-like terminal terminals 35a, 35b, and 35c are fixed around the cylindrical shaft portion 33, and a stopper portion 36 is provided at one end side (the 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 concave portion 32. One end of the outer edge sealing portion 38 is provided with a harness holding portion 38 located in the recess 19a of the first holder 11a.
a is formed. Further, a cushion portion 40 extends inward in the vicinity of the linear portion 38c at the arc portion 38b of the outer edge sealing portion 38. This cushion part 4
Numeral 0 protrudes in the shape of a mountain in the circumferential direction of the circular arc portion 38b, and serves to alleviate the impact when the rotary table 17 described below rotates and the spring receiving portion 61 abuts. In addition, the outer edge sealing portion 38 has one portion (the groove portion 3) at a central portion.
(0 side). The motor presser 39 is in direct contact with the motor 12 and
2 plays a role of absorbing noise and vibration generated from. The pressing surface side of the motor pressing portion 39 has three protrusions 39a.
Are formed, and the motor 12 can be reliably held.

As shown in FIG. 1, the motor 12 has a structure in which bearings 41 (one of which is not shown) provided at both ends support a rotating shaft 42 protruding toward the distal end.
Is mounted with a motor gear 43. As shown in FIG. 4, for example, the motor gear 43 is made of stainless steel (SU) having a notch 43b at the center of each tooth 43a.
The bevel gear of step 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 mounted in the motor housing 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 housing chamber 20 side.

The large-diameter gear 13 is formed of, for example, a synthetic resin (for example, polyacetal) as shown in FIG. 5, and is formed of a spiral bevel gear similar to the motor gear 43. The teeth 44 formed on the outer peripheral edge mesh with the motor gear 43 provided on the rotating shaft 42 of the motor 12 to constitute a speed reduction mechanism.
Further, a central portion of the large-diameter gear 13 slightly protrudes, and an engagement hole 46 having an engagement internal tooth 45 is formed at the center thereof.
An annular, slightly protruding ridge 47 is provided at the flat portion between the spiral tooth 44 and the engagement hole 46. In addition,
The protrusions 47 are provided to reduce the contact area with the mounting table 16 described below so that the rotation can be smoothly performed.

The small-diameter gear 14, 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, 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 is inserted by press-fitting its small-diameter portion 49 so that there is no play in the engagement hole 46 of the large-diameter gear 13, and each tooth portion 48 is meshed with the engagement internal tooth 45. , And rotates integrally with the large-diameter gear 13. That is, the small-diameter gear 14 can easily prevent rotation with the large-diameter gear 13 simply by engaging the small-diameter portion 49 with the engagement internal teeth 45 of the large-diameter gear 13. In addition, small diameter part 4
By simply limiting the range in which the large-diameter gear 9 is formed, the height dimension when integrated with the large-diameter gear 13 can be easily set to a desired value. In addition, 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, so that the manufacturing cost can be reduced.

The planet gear 15 is formed of a synthetic resin.
As shown in FIG. 1, it is constituted by a pair of spur gears mounted on the mounting base 16. A concave portion 51 is formed at the center of each planetary gear 15 from the upper surface side, and an insertion hole (not shown) is formed at the center thereof.

As shown in FIG. 1, the mounting base 16 is substantially fan-shaped and has an insertion hole 52 at the center of the arc through which the small-diameter gear 14 is inserted. It has a configuration. And among the shaft parts 53,
The two parts on both sides are inserted into the insertion holes of each planetary gear 15 and protrude into the recess 51.

As shown in FIGS. 7 (a) and 7 (b), the turntable 17 has a substantially disk shape and includes a large diameter portion 54 and a small diameter portion 55.

As shown in FIG. 7A, the first guide portion 5 extends along the outer edge of the large-diameter portion 54 on one surface of the turntable 17.
6 and a second guide portion 57 is provided at a predetermined interval inside the first guide portion 56, so that a return spring 58 (see FIG. 1) is provided 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 protruding inward are formed at both ends of the first guide portion 56 and the second guide portion 57, and the guide portions 34a and 34b of the second holder 11b move in the spring receiving portions 61. Guide groove 62 is provided.

An annular bearing 63 is provided at the center of the small diameter portion 55, and the second holder 11b
The annular shaft portion 33 is located. Further, arc holes 64 are respectively formed along the outer peripheral surface at positions symmetrical on both sides of the annular bearing portion 63, and arc walls 65 are respectively formed at positions orthogonal to these. An insulating plate 66 is rotatably disposed 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 has a pair of projections 67 and 68 projecting symmetrically on the front and back surfaces. The contact plate 69 is integrated on one surface by a projection 67, and the action knob 72 is integrated on the other surface by a projection 68.

As shown in FIG. 1, the contact plate 69 is formed by punching a thin plate having conductivity and spring properties into an annular shape. The contact plate 69 is provided with a through hole 70 that engages with the protrusion 67 at a symmetric position,
The contacts 71 that contact the terminal terminals 35a, 35b, and 35c are formed at positions orthogonal to these by bulging. Then, the contact plate 69
The terminal terminals 35a and 35b or 35b and 35c are connected in accordance with the rotational position of. The contact plate 69 is bent so as to protrude most 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 center, and bulges 74 extend from both ends in the longitudinal direction. I have. The bulging portion 74 has a fan shape at a predetermined angle from the center of the ellipse, and has a cutout portion 75 at the center thereof for engaging with the projection 68 of the insulating plate 66.

On the other hand, on the other surface of the turntable 17, as shown in FIG. 7B, a cylindrical portion 76 with which the shaft portions 53 formed on the mount 16 engage with the large diameter portion 54. , 77 are respectively formed. However, the central tubular portion 77 is formed in a substantially triangular shape so that the planetary gear 15 does not interfere during assembly.

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

The notch 75 of the action knob 72 is locked by a projection 68 of the insulating plate 66 protruding through the arc hole 64, so that both are integrally rotated. 78 is a waterproof O
It is a ring.

As shown in FIG. 1, the output shaft 18 is made of a metal rod, and has a flange 18a formed at the upper end and a substantially rectangular cutout at the lower end. The lower end of the output shaft 18
As shown in FIG. 9B, the through hole 5 of the small-diameter gear 14
The O-ring 78 is mounted at a position protruding from the bottom surface of the lower holder 11a, and the output lever 79 is integrated at a position protruding therefrom. Further, an action knob 72 is engaged with the upper end flange portion 18a of the output shaft 18 so as to rotate integrally.

Reference numeral 80 denotes a tight screw which is used when the upper holder 11b is mounted on the lower holder 11a. Reference numeral 81 denotes a wire harness,
It is composed of a Posister 24, a terminal terminal 35b, and an electric wire 81a connected to one of the terminal terminals 35a or 35c.

Actuator 1 composed of each of the above 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. Further, the action knob 72 is arranged on the arc-shaped cylindrical portion 77 of the turntable 17, and the projection 68 of the insulating plate 66 is projected from the opposite side through the arc hole 64 so that the cutout 75 of the action knob 72 is formed. By locking, these are integrated. In this state, the action knob 72 can rotate within the arc hole 64 within a predetermined angle range.
A so-called play is formed. Further, a contact plate 69 is integrated with the insulating plate 66 by a projection 67.

Then, after the planetary gears 15 are mounted 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 gears 15, the cylindrical portion 7 of the rotary base 17 is rotated.
6 and 77 are engaged with the shaft 53 in the recess 51 of the planetary gear 15, so that the planetary gear 15 is rotatably held by the mount 16 and the turntable 17.

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

Next, the motor 12 is accommodated in the motor accommodating chamber 19 of the first holder 11a together with the positive star 24 with the motor gear 43 attached to the rotating shaft 42 thereof.
At this time, since the large-diameter gear 13 can be rotated in a stable state by being supported by the steel ball 26 as described above, the motor gear 43 and the turning tooth portion 44 of the large-diameter gear 13 are securely engaged with each other. Is 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 abuts on the upper surface of the small-diameter gear 14, and further insertion is prevented. Therefore, the output lever 79 is integrated with the lower end of the output shaft 18 via the O-ring 78.

Thereafter, 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 housing chamber 20. The flange 18a of the output shaft 18 is
Through the insertion hole 52 of the action knob 72
Engages. The spring groove 5 of the turntable 17
9 is provided with a return spring 58 (see FIG. 9A).

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

Since the turntable 17 is provided with the retaining portion 60, there is no fear that the return spring 58 will come off even if it is housed in the spring groove 59 before the turntable 17 is assembled. .

The actuator 1 completed as described above
0 is applicable to, for example, the door lock mechanism 90 shown in FIG. 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 mounted on a base plate 91. Each of the levers 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 an inner lock knob 9 is provided.
By operating the lever 4, the lever 92 and the like are turned, and the door can be locked or unlocked.

From the base plate 91, the holding portion 95
A locking receiving claw 96 having a substantially L-shaped cross-section is formed on each side so as to bend from both sides in a direction in which the tip edge approaches.

The actuator 10 having the locking claw portion 85 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 an arrow in FIG. As a result, the locking claw 86 of the actuator 10 abuts against the locking receiving claw 96 and elastically deforms inward. It is formed. 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 forward, the large-diameter gear 13 and the small-diameter gear 14 rotate in the same direction, and accordingly, the two planetary gears 15 meshing with the small-diameter gear 14 rotate. Start. The planetary gear 15 is a small diameter gear 14
Is meshed with the internal teeth 28 of the first holder 11a, and the meshing position with respect to the internal teeth 28 changes.

The movement of the planetary gear 15 causes the turntable 1 to move.
7 rotates together with the mount 16, but the guide portions 34a and 34b formed on the second holder 11b do not move.
Return spring 58 disposed in spring groove 59
Is received by one of the guide portions 34a and 34b. That is, the turntable 17 is provided with the return spring 5.
8 rotates together with the mounting table 16 against the urging force. At this time, the return spring 58 moves inward from the first guide portion 56 on the outside of the turntable 17 to the retaining portion 6.
Since the extension 0 is extended, the return spring 58 does not dance, so-called undulation does not occur, and the return spring 58 does not bend outward and come off. Also, as described above, since a predetermined play is formed between the cylindrical portion 77 of the turntable 17 and the action knob 72, the action is performed after the motor 12 is driven and the turntable 17 rotates by a predetermined dimension. The rotation of the knob 72 will begin.

When the action knob 72 is rotated, the output shaft 18 integrated therewith is rotated, and the lever 92 constituting the door lock mechanism 90 of the automobile is rotated 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 drive of the motor 12 is stopped, the turntable 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 table 17, the action knob 7,
2. The door lock mechanism is driven via the output shaft 18, the output lever 79, and the operation lever 97, and the door lock state is established.

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

When the door lock mechanism 90 is in the locked state, the contact 71 of the contact plate 69 is connected to the wire harness 81 of the terminal terminals 35a or 35c.
Contacts the terminal terminal that is not connected to
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 when no current-carrying circuit is formed between b and 35a or 35c. 35b and 3
An energizing circuit is formed between 5a and 35c, and it can be determined whether the door lock mechanism 90 is in the door lock state or the door unlock state.

By providing a circuit for controlling the motor 12, when the door is locked, the motor 12
Is driven to rotate the rotating shaft 42 in the forward direction to bring the door to the unlocked state. In the door unlocked state, the motor 12 is driven to rotate the rotating shaft 42 in the reverse direction to bring the door into the locked state.

Further, since the output shaft 18 is a support shaft of the gear 14, the number of parts is reduced accordingly.

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, due to the play, in the door lock actuator 10, only the output shaft 18 and the action knob 72 are rotated only via the operation lever 97 and the output lever 79, and extra force is required to operate the inner lock knob 94 and the like. Is not 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, a spring groove is formed in a rotating member, a coil spring is housed in the spring groove, and guide portions are provided 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,
The rotating member can be reliably returned to the neutral position.

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

According to the invention having the action knob, by turning off the motor, the rotating member can be always returned to the neutral position by the urging force of the coil spring, and the operation from the output shaft side can be performed. In some cases, only the action knob operates, so that when the output shaft is connected to, for example, an inner lock knob of an automobile, the operation can be performed smoothly.

[Brief description of the drawings]

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

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

FIG. 3 is a plan view of a second holder shown in FIG. 1;

FIG. 4 is a sectional view of the motor gear shown in FIG. 1;

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

FIG. 6 is a partial sectional front view of the small-diameter gear shown in FIG. 1;

7A is a plan view of the turntable shown in FIG. 1 and FIG.

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

9A and 9B are a plan view and a cross-sectional view 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 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 symbols]

 DESCRIPTION OF SYMBOLS 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 accommodation room 20 Gear accommodation room 28 Internal teeth 34a, 34b Guide Part 43 motor gear 58 return spring (coil spring) 60 retaining part 72 action knob

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI H02K 7/116 H02K 7/116 (56) References JP-A-64-90376 (JP, A) JP-A-2-256775 (JP) JP-A-2-261180 (JP, A) JP-A-7-11825 (JP, A) JP-A-7-11826 (JP, A) JP-A-7-233664 (JP, A) 8-28119 (JP, A) JP 5-40557 (JP, U) JP 4-38049 (JP, B2) US Patent 5,221,239 (US, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) F16H 1/14 F16H 1/28 F16H 35/00 E05B 65/20 H02K 7/116

Claims (3)

(57) [Claims] A motor housing provided with an internal tooth on an inner peripheral surface of the gear housing; a motor gear housed in the motor housing and provided on a rotating shaft; A motor for projecting the gear housing chamber, an output shaft orthogonal to a rotation axis of the motor and disposed at the center of the gear housing chamber, and projecting a part of the gear shaft outside the housing member; A large-diameter gear housed in the chamber and rotating about the output shaft and meshing with the motor gear of the motor; a large-diameter gear provided coaxially with the large-diameter gear and fixed to one surface of the large-diameter gear; A small-diameter gear that rotates in accordance with the rotation operation of the large-diameter gear; meshes with the small-diameter gear and internal teeth formed in the gear housing chamber on one surface of the large-diameter gear; A planetary gear that changes the meshing position of A rotating member that is engaged with the planetary gear, rotates in the gear housing chamber, has a spring groove formed in an arc shape, and rotates the output shaft; and a coil spring housed in the spring groove. A guide portion formed on the housing member and positioned at both ends of the coil spring, for guiding the rotatable member rotatably in a rotating direction, and for urging the rotatable member to a neutral position via the spring. An actuator characterized by the above-mentioned. 2. The spring groove of the rotating member is formed by a spring guide portion erected at a predetermined interval, and is extended inward to a spring guide portion located outside to prevent the coil spring from falling off. 2. The actuator according to claim 1, further comprising: 3. An action knob which rotates with a play of a predetermined angle with respect to the rotation of the rotating member, and wherein the output shaft rotates integrally with the action knob. Item 3. The actuator according to Item 1 or 2.