JP2780246B2 - Motorized actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor type actuator which is used, for example, as an actuator for a door lock of an automobile and is operated by using a motor as a drive source.

[0002]

2. Description of the Related Art Conventionally, as this type of motor type actuator, those disclosed in, for example, Japanese Patent Application Laid-Open Nos. 62-29685 and 61-57780 are known. These motor-type actuators have a built-in switch that locks and unlocks the door lock by remote control and detects the state at the same time.

FIG. 3 is a front view in which a conventional motor-type actuator disclosed in the above-mentioned publications is applied to a door lock device of an automobile, FIG. 4 is a configuration diagram of the inside of the actuator, and FIG. FIG. 2 is a cross-sectional view taken along the line A. In the figure, reference numeral 1 denotes a door lock actuator, which is linked to a door lock mechanism 2 via a rod 3. Specifically, one end of a rod 3 is connected to a free end of a link lever 5 fixed to an output shaft 4 of the actuator 1 by a clamp 6, and the other end of the rod 3 has a lock knob 2b at a tip thereof. It is pin connected in the middle. The actuator 1 has a main body 7 made of synthetic resin.
The cover 8 is screw-connected to the body to form an enclosure.
Is integrally formed with a mounting hole 9 having a through-hole 9a having a cut-off portion at the outer end thereof, and the actuator 1 is screwed to the inside of the door by the mounting member 9. Further, the output shaft 4 connected to the door B <br/> click mechanism 2 is projected outward through the seal 12 from the hole 10 opened in the main body 7.

On the other hand, a motor 13
Is disposed, and the small gear 1 of the reduction mechanism is mounted on the motor shaft 13a.
4 is attached. A gear 15 meshing with the small gear 14 is mounted on a shaft 18 via a spring 16 having elasticity in the rotation direction between the gear 15 and a pinion gear 17. Outer teeth 21 d of a clutch input gear 21 mesh with the pinion gear 17.
Has roller guide walls 21a, 21a formed of fan-shaped inclined surfaces and an arc-shaped lever hole 21b, as shown in FIGS. A return spring 23 is provided on the roller guide walls 21a of the clutch input gear 21.
Rollers 22, 22 connected to both ends are engaged. Reference numeral 19 denotes a lever drum, on which a brake spring 20 is mounted on the outer periphery, and both ends 20a of the spring 20 abut on the stopper portions 7a of the main body 7 to restrict movement. A lever projection 19a protrudes near the outer peripheral portion of one side surface of the lever drum 19, and the lever projection 19a is fitted into a lever hole 21b of the clutch input gear 21.

Reference numeral 24 denotes a clutch output gear. A transmission projection 24a provided on the clutch output gear 24 is engaged with an inner wall 21c of the clutch input gear 21 so that the two gears 24, 21 are engaged.
Are combined to form a clutch. The clutch input gear 21, the lever drum 19 and the clutch output gear 24 are rotatably supported concentrically on a clutch shaft 25. Also, the gear 24d of the clutch output gear 24
Is meshed with the output gear 26, and the output gear 26 has a convex portion 26a elastically engaged with the plate 27. further,
The output gear 26 has a rotary sliding surface 26 with the main body 7.
The wiper 40 is fixed to b, and is configured to be switched between conducting and non-conducting with respect to the electrode 41 provided on the main body 7 by the rotation position of the output gear 26.
The plate 27 is fixed to the output shaft 4 by swaging.

Next, the operation of the above configuration will be described. When the lock knob 2b is pulled up from the state of the virtual line in FIG. 3 to the state of the solid line, and the lock mechanism 2 is in the unlocked state, the link bar 5 of the door lock actuator 1 is located on the unlock side shown in FIGS. doing. In this state, when the driver turns on a hand switch (not shown) to the lock side, a holding circuit (not shown) is operated, and the motor 13 rotates for a set time, for example, 0.5 seconds, and the small gear 14 Then, the pinion gear 17 is rotated while compressing the spring 16 via the reduction gear 15.

[0007] The rotation of the pinion gear 17 is transmitted to the clutch input gear 21 to bring the clutch into a connected state.
As shown in FIG. 7A, the clutch is connected by the clockwise rotation input to the clutch input gear 21 as shown in FIG.
The clutch input gear 21 rotates relative to the lever 19a, the movement of the roller 22 is prevented by the lever 19a, the return spring 23 is extended, and the roller guide wall 21 is extended.
The roller 22 is pushed out to the outer circumference in the radial direction along a, and the roller 22 comes into contact with the inner wall 21c of the clutch input gear 21 to stop the movement. At this time, as shown in FIG. 7 (b), the lever 19a is rotated at the same speed as the clutch input gear 21 by the slip between the brake spring 20 provided on the outer periphery of the lever drum 19 and the lever drum 19.

As described above, the roller 22 pushed to the outer periphery in the radial direction is rotated by the rotation of the clutch input gear 21, and as shown in FIG.
Of the clutch output gear 24
To rotate. By the rotation of the clutch output gear 24, the output shaft 4 is rotated via the output gear 26 and the plate 27, and the lever 2a is pulled down and locked via the link bar 5 and the rod 3 as shown by the phantom line in FIG. The mechanism 2 is locked. Thereafter, when the set time elapses and the power supply is stopped by a timer (not shown), the spring 1
The rotational force in the reverse rotation direction is transmitted to the motor 13 by the repulsive force of No. 6 and the reverse rotation causes the clutch input gear 21 and the clutch output gear 24 to loosen as shown by the dotted line in FIG. The roller 22 returns to the initial position shown in FIG. 7A due to the restoring force of the spring 23, and the clutch enters the disconnected state.

Here, with the operation of the output gear 26 from the unlocked state to the locked state, the wiper 40 fixed to the output gear 26 comes off from above the electrode 41 as shown in FIG. Changes to non-conduction, and lock mechanism 2
Is electrically detected. In the automatic operation from the locked state to the unlocked state, the operation direction of the switch mechanism by the wiper 40 and the electrode 41 is only opposite, and the operation is the same as that described above, and therefore the description is omitted.

[0010]

Since the conventional motor type actuator is configured as described above, the contact pressure of the wiper 40 is unstable due to the vertical movement of the output gear 26, and the detected current is very small. In this case, the contact resistance is unstable. Further, since the contact portion is used in a sliding state between the wiper 40 and the electrode 41, there is a problem that the contact portion is inevitably worn over time, and the reliability of the contact is lacking. Further, there is a problem that electric connection is complicated and workability is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can improve the reliability of the contacts, simplify the electric connection, improve the workability, and reduce the overall size. It is an object of the present invention to provide a motor-type actuator capable of achieving a high performance.

[0012]

Means for Solving the Problems Claim 1 according to the present invention.
Is a driving member coupled to a motor, a rotation transmission mechanism engaged with the driving member, a rotation driven member engaged with the rotation transmission mechanism and driving an output shaft, and a rotation position of the rotation driven member . Position detecting means for detecting
The position detection means and the motor are fixed and
A printed circuit board having a connection part,
The step abuts on the rotation driven member and changes its rotation direction.
Operation of the switch at a predetermined displacement.
Sensing lever, and the rotation driven member of the sensing lever,
Formed at the contact portion of the switch, and the rotation of the switch after the operation of the switch.
And a sliding portion that allows the driven member to slide.
It is characterized by having.

According to a second aspect of the present invention, there is provided a motor type actuator accommodating the first type.
To secure the motor to the above case.
Thus, the printed circuit board is fixed .

According to the first aspect of the present invention, the switch as the position detecting means of the driven member is provided on the printed circuit board fixed to the motor so that the sensing lever of the switch can be displaced in the rotation direction of the driven member. In addition, after the switch is operated , the sensing lever comes into contact with the driven member.
By Oite the driven member constituting a sliding portion that can slide, with possible to improve the reliability and operability of the contacts, it is possible to lay out the entire compact.

[0015] According to claim 2 of the present invention, without using a printed circuit board reverse rotational force generated in the motor, since they are received by the motor itself, the electrical connection between the motor and the printed circuit board Reliability can be ensured.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. Figure 1 is a plan view showing the internal structure of the motor actuator according to an embodiment of the present invention. In the figure, the rotation transmitting mechanism until it reached a output shaft 4 from the motor 13 in the conventional example shown in FIG. 3 Since they are the same, the corresponding portions are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 42 denotes a motor protection positive temperature coefficient thermistor, which is connected in series with the motor 13 in an electric circuit. Reference numeral 43 denotes a micro switch which is a small switch as a position detecting means, and a contact ON / OFF sensing lever 45 is rotatably attached to the upper right end. Reference numeral 44 denotes a printed circuit board on which the motor 13, the positive temperature coefficient thermistor 42, and the microswitch 43 are mechanically and electrically mounted by soldering or the like, and connected to an external power supply via a lead wire 46 derived from the right end. Have been.

The sensing lever 4 of the micro switch 43
5 is a portion 45 that comes into contact with the interference portion 26b with the output gear 26.
a, and the bending angle is bent toward the tangential direction of the end face 26 c of the outer peripheral tooth of the output gear 26 at the position where the microswitch 43 is turned on. The printed circuit board 44 is fixed to the main body 7 and the cover 8 by the front and rear end circular portions 13b of the motor 13 and the thickness direction of the motor 13 integrated with the printed circuit board 44. 8 peripheral parts 7a, 8
As shown in FIG. 2, there is a slight gap between the motor shaft 13a and the motor shaft 13a so that the motor shaft 13a has a degree of freedom in the rotation direction and the axial direction.

In the motor-type actuator having the above-described structure, by using the highly reliable microswitch 43 alone, it is possible to achieve both the reliability of the contact and the workability. Then, one printed circuit board 44
By fixing the motor 13, the positive temperature coefficient thermistor 42, and the microswitch 43 by soldering or the like,
Electrical and mechanical connections can be made at the same time, and workability can be improved.

The microswitch 43 and the motor 13
Are fixed on the same plane, the sensing lever 45 of the microswitch 43 needs to be in the operating position facing the output gear 26, and the operating range of the sensing lever 45 is limited by its structure. Is limited to an extremely small angle (approximately 10 °), so that it is necessary to increase the distance to the output gear 26. However, as in the above embodiment, the sensing lever 45 is output at the contact portion 45a with the output gear. Gear 26
Is bent in the tangential direction of the end face 26c of the outer peripheral tooth, so that the interference portion 26b
And presses the base 45a of the sensing lever 45 to turn on the micro switch 43. After the on operation,
The outer peripheral tooth end surface 26c of the output gear 26 and the sliding surface 45b of the sensing lever 45 slide. Therefore, it is possible to reduce the distance from the output gear 26 while keeping the operating range of the sensing lever 45 at a small angle, and to lay out the whole compact. Further, the printed circuit board 44 is integrated with the
And the cover 8, the reaction force generated on the motor 13 when the actuator is operated, that is,
The reverse rotation force is not applied to the solder portion for connection between the motor 13 and the printed circuit board 44, and the reliability of the connection portion can be improved.

In the above embodiment, the case where the present invention is used for a door lock actuator of an automobile has been described. However, when applied to any other actuator, the same effects as those of the above embodiment can be obtained.

[0022]

As described above, according to the first aspect of the present invention, the switch as the position detecting means for the driven member is provided on the printed circuit board fixed to the motor, and the sensing lever of the switch is used to rotate the driven member. Direction of the switch, and the contact of the sensing lever with the driven member
Since the driven member has a sliding portion that can slide after the operation , the reliability of the contact point and the workability of the electrical connection portion can be improved, and the whole can be configured compact.

Further, by fixing the printed circuit board integrated with the motor to the case via the motor as in claim 2 of the present invention, the reverse rotational force generated in the motor when the actuator is operated can be reduced. Can be received by the motor without adding force to the motor, so that unnecessary stress is not applied to the connection part such as soldering between the printed circuit board and the motor, and the reliability of the electrical connection between the two is further improved. can do.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the inside of a motor-type actuator according to an embodiment of the present invention.

FIG. 2 is an arrow view from a direction B in FIG. 1;

3 is a front view of applying the conventional motor type actuator motor vehicle door <br/> locking device state.

FIG. 4 is a configuration diagram showing the inside of the motor-type actuator shown in FIG. 3;

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is an exploded perspective view of a conventional clutch mechanism.

FIG. 7 is an explanatory diagram showing operation steps of a conventional clutch mechanism.

FIG. 8 is a detailed view of a conventional switch mechanism.

[Explanation of symbols]

 Reference Signs List 4 output shaft 7 main body (part of case) 8 cover (other part of case) 13 motor 13a motor shaft 26 output gear (driven member) 43 micro switch (position detecting means) 44 printed circuit board 45 sensing lever

Claims (2)

(57) [Claims] 1. A driving member coupled to a motor, a rotation transmission mechanism engaged with the driving member, a rotation driven member engaged with the rotation transmission mechanism and driving an output shaft, and a rotation driven member
Position detecting means for detecting the rotational position of
Secures the step and the motor and has an electrical connection
A printed circuit board.
So that it can be displaced in the direction of rotation by contacting the driven member
Sensing lever that operates the switch with a predetermined displacement
And a contact portion of the sensing lever with the rotation driven member.
The rotation driven member slides after the operation of the switch.
A motor-driven actuator, comprising: a movable portion that is movable . 2. A motor-operated actuator according to claim 1.
Equipped with a case for storing the motor and fixing the motor to the above case
A motor-type actuator characterized in that the printed circuit board is fixed by doing so .