JPH0596601U - Actuator - Google Patents

Abstract

(57) [Summary] [Purpose] Reliability is ensured by reliably driving the door opening / closing mechanism by continuing to supply power to the actuator motor from when the swing arm is in the stroke until it reaches the stroke end. To provide a high actuator. A first switch 8 which has one end connected to one power supply terminal 12 and the other end connected to one brush terminal of an actuator motor and which is switched on and off during a stroke of a swing arm 7. An actuator 1 provided with a second switch 9 that is connected in parallel to the first switch 8 and that switches on and off at the stroke end of the swing arm 7 in response to rotation of the swing arm 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an actuator for a door lock used to automatically lock or unlock a door of a vehicle by supplying power.

[0002]

[Prior Art]

 As an actuator that automatically locks or unlocks the vehicle door by supplying power, the swing arm connected to the door opening / closing mechanism is detected by a switch that detects the stroke of the swing arm just before it reaches the stroke end. It is known that the power supply to the actuator motor that drives the actuator is stopped, and the swing arm moves to the stroke end even after the power supply to the actuator motor is stopped, due to the rotational power that accompanies the inertia of the actuator motor. Move.

[0003]

[Conventional drawback]

 However, in the above-mentioned actuator, since the swing arm has a structure in which power supply to the actuator motor is stopped just before reaching the stroke end, the side of the door opening / closing mechanism connected to the swing arm in the mounted state on the vehicle body is If the swing arm does not operate unless a large load is applied due to rubbing or running out of oil, and the power supply to the actuator motor is stopped before the swing arm reaches the stroke end, the swing arm will stop operating in the middle of the stroke. It is hard to say that there is a risk that it will happen, and there is a drawback that if the swing arm stops during the stroke, there is a possibility that the door opening / closing mechanism cannot be driven.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the invention is that if the power supply to the actuator motor is stopped just before the swing arm reaches the stroke end, there is a possibility that the door opening / closing mechanism cannot be driven. is there.

[0005]

[Means for Solving the Problems]

 The actuator according to the present invention has one end connected to one power supply terminal and the other end connected to one brush terminal of the actuator motor and the stroke of the swing arm in order to reliably drive the door opening / closing mechanism. A first switch for switching on and off, and a second switch connected in parallel to the first switch for switching on and off at the stroke end of the swing arm in response to the swing arm swinging. In a more preferred embodiment, a holder that is concentric with the worm wheel and that operates with the swing arm is provided between the worm wheel and the actuator case, and the holder and the worm wheel are provided. The first switch is placed between the The feature is that the second switch is arranged between the cheetah cases, and the power supply to the actuator motor is kept continuous from when the swing arm is in the stroke until it reaches the stroke end. By doing so, the objective was to provide a highly reliable actuator by reliably driving the load.

[0006]

[Action]

 In the actuator according to the present invention, the first switch turns off when the swing arm is in the stroke to stop the power supply to the actuator motor. The second switch is turned on until it reaches the position, and the actuator motor continues to be energized, so that the actuator motor continues to be driven until the swing arm reaches the stroke end. Therefore, the swing arm continues the stroke without stopping in the middle of the stroke.

[0007]

【Example】

 An embodiment of the actuator according to the present invention will be described below with reference to FIGS.

The illustrated actuator 1 includes an actuator motor 4, a worm 5 a, a worm wheel 5 b, and a pinion 5 c between a first actuator case 2 and a second actuator case 3, a power transmission mechanism 5, and a contactor holder (holder). 6), a sector 7a provided on the swing arm 7, a first switch 8 and a second switch 9 are housed, and after the first actuator case 2 and the second actuator case 3 are combined, The screw 10 is screwed.

An actuator motor 4 is fixed to the upper side of the first actuator case 2 in FIG. 1, and a motor shaft 4 a provided in the actuator motor 4 constitutes a part of a power transmission mechanism 5. Worm 5a is attached. The actuator motor 4 energizes the motor shaft 4a in the forward and reverse directions from one brush terminal 4b and the other brush terminal 4c to rotate the motor shaft 4a in the forward and reverse directions.

Further, a pivot shaft portion 2b protruding axially toward the right side in FIG. 2 is provided at approximately the center of the bottom surface 2a of the first actuator case 2, and this pivot shaft portion 2b is A worm wheel 5b forming another part of the power transmission mechanism 5 is inserted. The worm wheel 5b is rotatably supported by the pivot shaft 2b and is attached to the return position A1 in FIG. 6 by a return spring 11 mounted outside the pivot shaft 2b while meshing with the worm 5a. It is energized. A part of the worm wheel 5b on the inner peripheral side is provided with a pinion locking part 5b1 that slightly protrudes in the centripetal direction. The pinion locking part 5b1 allows the worm wheel 5b to elastically repel the return spring 11. The pinion 5c is locked while rotating from the A1 position to the A3 position in FIG. 6 against the force.

The central portion of the power supply terminals 12 and 13 connected to external wiring (not shown) is attached to the lower side of the first actuator case 2 in FIG. 1, and the tips of the power supply terminals 12 and 13 are attached. The side projects into the connector insertion portion 2c having a rectangular hole shape, and the base end sides of the power supply terminals 12 and 13 are the first of the terminal plates 8a, 8b, and 8c included in the first switch 8 described later. It is connected to the terminal plate 8a and the third terminal plate 8c.

As is apparent from FIG. 5, the terminal plates 8a, 8b, 8c are attached to the bottom surface 2a of the first actuator case 2. The first terminal plate 8a, the second terminal plate 8b, and the third terminal plate 8c are all thin-walled conductive plates, and are separated from each other by a distance of about 60 degrees to the lower side corresponding to the worm wheel 5b. There is.

The cathode of the first diode D1 is connected to one end of the first terminal plate 8a, and the anode of the first diode D1 is connected to one end of the second terminal plate 8b. The anode of the second diode D2 is connected to the other end of the second terminal plate 8b, and the cathode of the second diode D2 is connected to one end of the third terminal plate 8c. Each of the diodes D1 and D2 forms a constant energization path from the second terminal plate 8b to the first terminal plate 8a and from the second terminal plate 8b to the third terminal plate 8c. The other end of the third terminal plate 8c is connected to one brush terminal 4b of the actuator motor 4, and the other brush terminal 4c of the actuator motor 4 is connected to the other power supply terminal 13. The one power supply terminal 12 is connected to the other end of the first terminal plate 8a.

A contactor holder 6 is assembled in the space between the worm wheel 5 b and the bottom surface 2 a of the first actuator case 2. The contactor holder 6 is provided with a disk-shaped base portion 6a and an engagement convex portion 6b which axially projects from a part of the outer periphery of the base portion 6a toward the right side in FIG. The contactor holder 6 is inserted into a holder supporting portion 2d formed in an annular shape outside the pivot portion 2b of the first actuator case 2, and is rotatably supported by the holder supporting portion 2d.

On the right side of the worm wheel 5b in FIG. 2, a pinion 5c forming a part of the rest of the power transmission mechanism 5 is inserted through the pivot portion 2b. A part of the outer circumference of the pinion 5c is provided with a locking projection 5c1 which projects outward in a fan shape. The locking projection 5c1 is pushed by the pinion locking part 5b1 of the worm wheel 5b. When moved, the pinion 5c rotates in response to the rotation of the worm wheel 5b from the A1 position to the A3 position.

A swing arm 7 meshes with the pinion 5c. The swing arm 7 is provided with a sector portion 7a having a sector shape, and an output portion 7c fixed to the base end side of the sector portion 7a via a shaft portion 7b outside the first actuator case 2 at the base end side. The shaft portion 7b is rotatably supported on the right side of the first actuator case 2 in FIG. 1, and the output portion 7c is connected to a door opening / closing mechanism (not shown) serving as a load. The swing arm 7 rotates from the C1 position to the C3 position in FIG. 6 in response to the rotation of the pinion. An engaging hole 7a1 having an elliptical shape is provided at the substantially center of the sector portion 7a, and the engaging convex portion 6b of the contactor holder 6 is inserted into the engaging hole 7a1.

Since the engagement protrusion 6b of the contactor holder 6 is inserted into the engagement hole 7a1 of the swing arm 7, when the swing arm 7 is rotated from the C1 position to the C3 position in FIG. Since the convex portion 6b is pushed, the contactor holder 6 rotates together with the swing arm 7 from the B1 position to the B3 position in FIG.

Further, a central portion of a contactor 8 d provided on the first switch 8 is fixed to the base portion 6 a of the contactor holder 6 on the bottom surface 2 a side of the first actuator case 2.

As is clear from FIG. 5, the contactor 8d of the first switch 8 has an arc-shaped conductive shape that is slightly shorter than the arc lengths in the central portions of the first terminal plate 8a and the second terminal plate 8b. The plate is provided with a mounting portion 8d1 for fixing it to the contactor holder 6 in the center, and the mounting portion 8d1 is in contact with both end sides bent toward the terminal plates 8a, 8b, 8c side. Parts 8d2 and 8d3 are provided respectively. Then, the contactor 8d connects the first terminal plate 8a to the second terminal plate 8b and the second terminal plate 8b to the third terminal plate 8c when the contactor holder 6 rotates.

As is apparent from FIG. 4, the second switch 9 is connected in parallel with the first switch 8 and is arranged between the contactor holder 6 and the worm wheel 5b. The second switch 9 is provided with a terminal plate 9a fixed to the worm wheel 5b and contactors 9b and 9c fixed to the base 6a of the contactor holder 6, and one contactor 9b and the other contactor 9c are Is also a conductive plate, one end of each of the contactor 9b and the other contactor 9c is provided with contact portions 9b1 and 9c1 bent toward the terminal plate 9a side, and the other end thereof is connected to the first contactor 9b. There are provided contact portions 9b2, 9c2 that are bent toward the terminal plates 8a, 8b, 8c of the first switch 8, and these contactors 9b, 9c are located at opposite positions. Further, the terminal plate 9a is a C-shaped conductive plate, and a non-conducting region is partially formed therein.

Here, as is apparent from FIGS. 5 and 6, when the worm wheel 5b is in the A1 position, the contactor holder 6 is in the B1 position, so that the contactor 8d of the first switch 8 has the second terminal plate. Since 8b is connected to the first terminal plate 8a and the contactor holder 6 is at the B1 position, one contactor 9b of the second switch 9 is connected to the third terminal plate 8c of the first switch 8. A contact path is formed between the terminal plate 9a and the third terminal plate 8c of the first switch 8, and the other contactor 9c of the second switch 9 is the first terminal of the first switch 8. Since it is not in contact with the plate 8a, there is no connection between the terminal plate 9a and the first terminal plate 8a of the first switch 8. Does not form an electric path.

Further, as is clear from FIGS. 7 and 8, when the worm wheel 5b is rotated to the A2 position, the contactor holder 6 is in the B2 position, so that the contactor 8d of the first switch 8 has the first contactor 8d. Since the second terminal plate 8b is connected to the third terminal plate 8c apart from the terminal plate 8a and the contactor holder 6 is in the B2 position, one of the contactors 9b of the second switch 9 is the first switch. The third contact plate 8c of the second switch 9 is in contact with the third terminal plate 8c of the first switch 8 to form an energization path between the terminal plate 9a and the first terminal plate 8a of the first switch 8. Since it is in contact with the first terminal plate 8a of the switch 8, the terminal plate 9a and the first switch 8a are in contact with each other. An energization path is formed between the first terminal plate 8a of the switch 8 and the third terminal plate 8c of the first switch 8.

When the worm wheel 5b further rotates from the state shown in FIGS. 7 and 8 to the A3 position, the contactor holder 6 moves to the B3 position, so that the contactor 8d of the first switch 8 is Since the second terminal plate 8b is connected to the third terminal plate 8c and the contactor holder 6 is in the B3 position, the other contactor 9c of the second switch 9 is the first terminal 8 of the first switch 8. Although in contact with the null plate 8a, one of the contactors 9b of the second switch 9 is separated from the third terminal plate 8c of the first switch 8 and the terminal plate 9a and the first terminal plate of the first switch 8 are separated. Since the power supply path to and from 8a is cut off, the terminal plate 9a and the first terminal plate of the first switch 8 are connected. The power supply path between the switch 8a and the third terminal plate 8c of the first switch 8 is cut off.

The actuator 1 having such a structure is fixed near the door opening / closing mechanism provided on the vehicle door, and the door opening / closing mechanism is connected to the output portion 7c of the swing arm 7. A power supply is connected to the power supply terminals 12 and 13 via a door lock switch (not shown).

Then, when the power is supplied from one power supply terminal 12 to the other power supply terminal 13 by switching the door lock switch, the worm wheel 5b is returned to the return position as shown in FIGS. Since the contactor holder 6 is in the B 1 position, the contactor 8d of the first switch 8 forms an energization path between the first terminal plate 8a and the second terminal plate 8b. One power supply terminal 12 → first terminal plate 8a of first switch 8 → contactor 8d of first switch 8 → second terminal plate 8b of first switch 8 → second diode D2 → first switch No. 8 third terminal plate 8c → actuator motor 4 one brush terminal 4b → actuator motor 4 other brush end A current flows from the child 4c to the other power supply terminal 13, and the motor shaft 4a of the actuator motor 4 rotates forward.

The forward rotation of the motor shaft 4a of the actuator motor 4 causes the worm wheel 4b to rotate counterclockwise in FIG. 6, so that the pinion 5c of the worm wheel 5b causes the pinion 5c to move as shown in FIG. It is pushed counterclockwise inside. When the pinion 5c is pushed counterclockwise in FIG. 6, the swing arm 7 at the C1 position starts a stroke.

When the swing arm 7 starts its stroke, the contactor holder 6 starts to move from the B1 position by the engagement protrusion 6b inserted into the engagement hole 7a 1 of the swing arm 7. Since the contactor holder 6 starts moving from the B1 position, when the worm wheel 5b reaches the A2 position during the stroke of the swing arm 7, the contactor holder 6 reaches the B2 position, and as shown in FIG. The contactor 8d of the first switch 8 separates from the first terminal plate 8a and connects the second terminal plate 8b to the third terminal plate 8c.

When the contactor 8d of the first switch 8 separates from the first terminal plate 8a, the current from one of the power supply terminals 12 is cut off, and at the same time the contactor holder 6 is in the B2 position. One contactor 9b of the second switch 9 forms an energization path between the terminal plate 9a and the third terminal plate 8c of the first switch 8, and the other contactor 9c of the second switch 9 is the terminal plate 9a. And a first terminal plate 8a of the first switch 8, a power supply path is formed between one power terminal 12 → the first terminal plate 8a of the first switch 8 → the other of the second switch 9. Contactor 9c → terminal plate 9a of second switch 9 → contactor 9b of second switch 9 → first The third terminal plate 8c of the switch 8 → the brush terminal 4b of one of the actuator motors 4 → the other brush terminal 4c of the actuator motor 4 → the current flows to the other power supply terminal 13 and the actuator motor 4 is continuously energized. , The motor shaft 4a continues to rotate forward.

Since the motor shaft 4a of the actuator motor 4 continues to rotate forward, the worm wheel 5b rotates to the A3 position. When the swing arm 7 strokes to the stroke end C3 position by the pinion 5c by rotating the worm wheel 4b to the A3 position, the contact holder 6 reaches the B3 position, so that one of the second switches 9 The contactor 9b is separated from the third terminal plate 8c of the first switch 8 and the energization path from the first terminal plate 8a of the first switch 8 to the third terminal plate 8c of the first switch 8 is cut. The power supply to the actuator motor 4 is cut off, the motor shaft 4a stops rotating, and the swing arm 7 stops at the stroke end.

[0030]

[Effect of the device]

 As described above, the actuator according to the present invention has one end connected to one power supply terminal and the other end connected to one brush terminal of the actuator motor, and is switched on and off during the stroke of the swing arm. Since the first switch for switching and the second switch connected in parallel to the first switch for switching on and off at the stroke end of the swing arm are provided, the swing arm is Even if the first switch is turned off during the stroke and the energization of the actuator motor is stopped, the second switch remains on during the period from when the swing arm is in the stroke until it reaches the stroke end. To keep the actuator motor energized by switching it on, Since the actuator motor continues to be driven and the actuator motor is driven until the swing arm reaches the end of the stroke, the swing arm does not stop in the middle of the stroke, so that the load can be reliably driven. In addition, it has an excellent effect that the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of an embodiment of an actuator according to the present invention.

FIG. 2 is a vertical cross-sectional bottom view of the actuator shown in FIG.

FIG. 3 is an external perspective view for explaining an assembling relationship between the first switch and the second switch in the actuator shown in FIG.

4 is a schematic circuit diagram of the actuator shown in FIG.

FIG. 5 is a combination diagram for explaining the operation of the first switch and the second switch in the actuator shown in FIG.

6 is a combination diagram for explaining the operation of the worm wheel and the swing arm in the actuator shown in FIG.

7 is a combination diagram for explaining the operation of the first switch and the second switch in the actuator shown in FIG.

8 is a combination diagram for explaining the operation of the worm wheel and the swing arm in the actuator shown in FIG.

[Explanation of symbols]

 1 Actuator 2, 3 Actuator Case 4 Actuator Motor 4a Motor Shaft 4b, 4c Brush Terminal 5b Worm Wheel 7 Swing Arm 8 First Switch 9 Second Switch 12, 13 Power Terminal

Claims (2)

[Scope of utility model registration request] 1. An actuator case, one power supply terminal and the other power supply terminal arranged in the actuator case, and energization from one brush terminal and the other brush terminal while being housed in the actuator case. An actuator motor having a motor shaft that rotates in forward and reverse directions, a worm wheel that is rotatably supported by the actuator case and that transmits rotational power of the motor shaft, and rotatably supported by the actuator case. A swing arm having one end connected to the worm wheel and the other end connected to a load; one end connected to the one power supply terminal and the other end connected to one brush terminal of the actuator motor. And during the stroke of the swing arm, A first switch for switching and off, and a second switch connected in parallel to the first switch and for switching on and off at the stroke end of the swing arm in response to the rotation of the swing arm. An actuator having a switch. 2. A holder, which is concentric with the worm wheel and operates together with the swing arm, is provided between the worm wheel and the actuator case, and a first switch is provided between the holder and the worm wheel and between the holder and the actuator. The actuator according to claim 1, wherein a second switch is provided in the actuator.