JPH0714013Y2 - Electric actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to improvement of an electric actuator used as a drive source for operating a door or the like of an air conditioner for a vehicle.

(Prior Art) Recent automobiles have been electrified, and electric motors have been used to control the opening and closing of the window glass of the passenger lift doors and the operation of wind direction switching dampers (commonly known as doors) in automobile air conditioners. Actuator is used.

As shown in FIG. 4, this electric actuator includes a motor M and a worm 2, a worm wheel, which are connected to the motor M in a casing 1 composed of a bottomed case 1a and a lid 1b closing the case 1a. 3, a spur gear 4, and the like, a drive gear 6 rotated by the reduction gear 5, and an output shaft 7 rotated by the drive gear 6.
And a sliding member 8 that rotates in synchronization with the rotation of the output shaft 7.
(See FIG. 4) and a rotation control section 9 for controlling energization of the motor M according to the rotational position of the sliding member 8. Then, when a power feeding coupler (not shown) is connected to the coupler k having the connector pin 10 provided on the side portion of the casing 1 and the power is fed, the motor M operates and the output shaft protruding from the lid 1b. The rotation operation of a rotation link (not shown) attached to the end portion of 7 is transmitted to various doors through a control cable as necessary, and the opening degree of the door is controlled.

The rotation control unit 9 is a kind of potentiometer,
As shown by the diagonal lines in FIG. 5, resistor patterns P ₁ and P ₂ are printed on the upper surface of the case 9a.
The rotation amount of the output shaft 7 is detected from the change in resistance value caused by the sliding movement of the sliding member 8 by sliding contact between P ₁ and P ₂ and the brush-shaped sliding member 8 driven by the driving gear 6. It is supposed to do. That is, when the sliding member 8 is at the position A in the figure, the resistance value is the length from the end of the outer resistor pattern P ₁ to which the terminal a is connected to the sliding member 8 and the sliding member. 8 is a value corresponding to the length of the inner common resistor pattern P ₂ to which the terminal b is connected. The rotation amount of the output shaft 6 is detected by this resistance value, and the opening / closing operation amount of the door is detected. ing.

Some electric actuators are disclosed in Japanese Utility Model Laid-Open No. 56-166,813 and Japanese Patent Laid-Open No. 60-53,419.

In this electric actuator, the ones corresponding to the resistor patterns P ₁ and P ₂ of the electric actuator described above are formed of an electrically conductive material such as copper, and a brush-like pattern is formed on the conductor pattern thus formed. The sliding member operates in sliding contact to form a kind of switch mechanism. That is, if the sliding member comes off the end of the conductor pattern while it is operating, the power supply to the motor M is automatically stopped and the motor M is stopped.

(Problems to be solved by the invention) However, in manufacturing these electric actuators, as is apparent from FIG.
The terminals a, b, c (see FIG. 5) protruding from the rotation controller 9 and the connector pins 10 and the like must be soldered to the conductive pattern 12 on the printed circuit board 11 directly or via the power supply line 13. . Soldering such a large number of parts individually is extremely troublesome work, lacks promptness in manufacturing work, and lowers workability.

Further, since the electric actuator requires parts such as the terminal d of the motor M, the printed board 11, the connector pin 10, and the power supply line 13, the number of parts is large, which is disadvantageous in terms of cost.

The present invention has been made in order to solve the drawbacks and problems associated with the above-described conventional technology, and it is possible to eliminate the soldering work of various components and provide a cost-effective electric actuator with a small number of components. To aim.

[Means for Solving the Problems] (Means for Solving the Problems) The present invention for achieving the above object is to provide a motor, a reduction mechanism connected to the motor, and a rotation mechanism by the reduction mechanism in a bottomed case. An output shaft, and a rotation control unit that controls energization to the motor according to the rotational position of the output shaft.The bottomed case is electrically connected to the terminals of the motor and the rotation control unit. In an electric actuator having a coupler provided with a connector pin, the terminal of the rotation control unit, the terminal of the motor and the connector pin are integrally formed by a conductive plate, and at least the conductive plate of the rotation control unit is It is an electric actuator that is fixedly connected to a protrusion protruding from the bottom surface of a bottomed case.

Further, the present invention for achieving the above-mentioned object is to form a lower bottom surface on which the motor is mounted and an upper bottom surface on which the rotation control unit is installed on a bottom surface of the bottomed case, and a side surface of the upper bottom surface. Is an electric actuator in which the end portions of the conductor are collected to form the coupler.

(Operation) With this configuration, the rotation control unit terminal, the motor terminal,
Since the connector pins can be formed by a conductive plate, when assembling the electric actuator, no soldering work is required and no printed circuit board is used.
The motor and the rotation control unit can be incorporated in the case.

Moreover, this electric actuator has a reduced number of parts, which is advantageous in terms of cost.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a main part according to an embodiment of the present invention,
FIG. 2 is a schematic front view of the embodiment shown in FIG. 1, and FIG. 3 is an explanatory view of a rotation control unit of the embodiment, and the same members as those shown in FIGS. Is attached.

This electric actuator 20 has a bottomed case 1a,
On the case 1a, a motor M, a reduction mechanism 5 connected to the motor M (however, only the worm 2 is shown for simplicity), and a drive gear 6 rotated by the reduction mechanism 5
The output shaft 7 rotated by the drive gear 6, the sliding member 8 (see FIG. 3) that rotates in synchronization with the rotation of the output shaft 7, and the rotation position of the sliding member 8. A rotation control unit 9 for controlling energization of the motor M is provided.

Particularly, the bottom surface 21 of the case 1a has a stepped shape having a lower bottom surface 21a on which the motor M is mounted and an upper bottom surface 21b on which the rotation control unit 9 is installed. I have to. An end of a conductive plate 22 made of a flat conductive material is connected to the terminal d of the motor M, and the other end of the conductive plate 22 extends inside the lower bottom surface 21a and is formed on a side surface of the upper bottom surface. The coupler is extended to 23.

On the other hand, the terminals a, b, c provided on the rotation control unit 9 and the above-mentioned connector pin 1 electrically connected to the terminals a, b, c
0 is integrally formed by a conductive plate 24 made of a flat conductive material similar to the conductive plate 22. This conductive plate 24
Extends along the upper surface of the upper bottom surface 21b, and the end portion thereof projects into the coupler k.

In particular, the conductive plate 24 has a large-diameter portion 24a formed in the middle portion thereof, and the through-hole 25 formed in the large-diameter portion 24a is fitted with the projection 26 projected from the upper bottom surface 21b. The rotation control unit 9 is fixed on the upper bottom surface 21b.

With this configuration, the motor M and the rotation control unit 9 and the coupler k can be electrically connected without providing the printed circuit board 11 as shown in FIG. It also reduces the number of soldering and connection work points.

Next, the operation will be described.

To assemble the electric actuator 20, first,
A step-like case 1a having 21a and an upper bottom surface 21b is molded with a synthetic resin. In this case, the conductive plate 22 for the motor M is also embedded in the lower bottom surface 21a and the upper bottom surface 21b, and its end portion is formed. Is molded so as to protrude from the coupler k.

When the case 1a is formed in this manner, the upper bottom surface 21b
The rotation control section 9 is set on the upper side, the tip of the conductive plate 24 protruding from the rotation control section 9 is projected into the coupler 22, and the projection 26 is inserted into the through hole 25. By heating, the conductive plate 24 is fixed by caulking on the upper bottom surface 21b.
As a result, the rotation control unit 9 is held in a fixed position with respect to the displacement caused by the rotation of the drive gear 6 and also with respect to the phase input when the power supply coupler is connected.

Then, with the terminal d of the motor M abutting on the end of the conductive plate 22 protruding from the lower bottom surface 21a, the motor M is moved downward.
a Fix on top.

Since the worm 2 is provided at the end of the rotary shaft of the motor M, the worm 2 and the worm wheel are meshed with each other to form the speed reduction mechanism 5, and the drive gear 6 is rotated by the speed reduction mechanism 5. To mesh.

With this configuration, the motor M and the rotation control unit 9 can be connected without soldering the terminals d of the motor M and the terminals a, b, c of the rotation control unit 9 and the printed circuit board 11 as in the conventional case. It can be electrically connected to the coupler k, and the manufacturing work becomes extremely simple.

When the motor M is driven by connecting the power supply coupler to the coupler 22 of the electric actuator 20 which has been assembled, the drive gear 6 rotates via the reduction gear mechanism 5 and the resistor patterns P ₁ , P of the rotation control unit 9 are rotated. _The brush-shaped sliding member 8 is slidably contacted with the sliding member _2, and the rotation amount of the output shaft 6 is detected from the change in the resistance value caused by the movement of the sliding member 8. That is, the sliding member 8 is moved from the position where the terminal a is connected.
To the outer resistance pattern P ₁ and the resistance value determined by the length from the sliding member 8 to the end of the inner common resistance pattern P ₂ to detect the rotation amount of the output shaft 6, The opening / closing operation amount of will be set.

In addition, in the above-described embodiment, the rotation control unit 9 is configured to function as a kind of potentiometer, but the present invention is not limited to this. You may use what was done.

[Effects of the Invention] As is apparent from the above description, according to the present invention, the terminals of the rotation control unit and the terminals of the motor in the electric actuator are integrally formed by the connector pin and the conductive plate, and at least the conductivity of the rotation control unit is improved. Since the plate is fixedly connected to the projection protruding from the bottom surface of the bottomed case, it is possible to easily assemble the electric actuator without soldering work and without using the printed circuit board and the power supply line. it can.

Moreover, this electric actuator has a reduced number of parts, which is advantageous in terms of cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part according to an embodiment of the present invention,
2 is a schematic front view of the embodiment shown in FIG. 1, FIG. 3 is an explanatory view of a rotation control unit of the same embodiment, FIG. 4 is a sectional view of a conventional electric actuator, and FIG. FIG. 6 is a schematic view showing the inside of the rotation control unit, and FIG. 6 is a perspective view of a main part of the conventional electric actuator. 1a …… Case, 5 …… Reduction mechanism, 7 …… Output shaft, 9 ……
Rotation control part, 10 ...... connector pin, 20 ... electric actuator, 21 ... bottom, 21a ... bottom bottom, 21b ... top bottom, 22,24 ... conductive plate, 26 ... projection, a, b , c, d …… terminal,
k: coupler, M: motor.

Claims (2)

[Scope of utility model registration request] 1. A motor (M) in a bottomed case (1a),
The speed reduction mechanism (5) connected to the motor (M), the output shaft (7) rotated by the speed reduction mechanism (5), and the motor (M) according to the rotational position of the output shaft (7). ) And a rotation control section (9) for controlling energization to the motor (M) and the rotation control section (9) in the bottomed case (1a).
An electric actuator equipped with a coupler (k) provided with a connector pin (10) electrically connected to the terminal of the rotation controller (9) of the rotation controller (9), The terminal (d) and the connector pin (10) are integrally formed by conductive plates (22, 24), and at least the conductive plate (24) of the rotation control section (9) is attached to the bottom surface of the bottomed case (1a) ( 21b) An electric actuator which is fixedly connected to a protrusion (26) protruding from the protrusion. 2. A lower bottom surface (21a) on which the motor (M) is mounted and an upper bottom surface (21b) on which the rotation control section (9) is installed, on the bottom surface (21) of the bottomed case (1a). And a conductive plate (22, 24) is formed on the side surface of the upper bottom surface (21b).
The electric actuator according to claim 1, wherein the coupler (k) is formed by collecting end portions of the coupler.