JPS6328570Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door lock actuator, and more particularly to a door lock actuator that automatically locks and unlocks an automobile door using an electrically operated switch.

Conventionally, in actuators for door lock devices, electromagnetic solenoids have been used as driving means. The thrust generated by this electromagnetic solenoid is based on the magnetic attraction force between the axially opposing end surfaces of the movable core and yoke, so its thrust characteristics are as follows:
At the start of the operation, the generated thrust is small, and at the end of the operation, the generated thrust is large.

Therefore, door lock actuators that use electromagnetic solenoids as driving means have the following drawbacks.

(1) Since the thrust generated at the end of the operation is large, the operation sound at the end is shocking and becomes quite loud.

(2) If a sound absorbing material is attached to the end face of the yoke or the end face of the mover in order to absorb the impact sound at the end, the length of the gap that generates the electromagnetic attraction force becomes large, resulting in a decrease in the thrust force generated.

(3) Since it is necessary to use separate electromagnetic coils for each of the pushing and pulling operations, the size and weight are large.

Therefore, in order to eliminate the above-mentioned drawbacks, a movable magnet type door lock actuator has been proposed in Japanese Utility Model Application No. 123955/1983.

FIG. 1 is a longitudinal sectional front view of a drive unit in the conventional movable magnet type door lock actuator.

In the figure, reference numeral 1 denotes a yoke having a substantially E-shaped end face in longitudinal section, and is composed of a cylindrical outer circumferential yoke 2, a center yoke 3, and side yokes 4, 4a, all of which are made of a soft magnetic material. side yoke 4,4
a is a side plate 5 attached to both ends of the outer yoke 2;
It is integrated with the outer circumferential yoke 2 via 5a. 6, 6a are bearings fixed to the centers of the side yokes 4, 4a.

Inside the yoke 1, two electromagnetic coils 8, 8a are arranged, which are housed in coil bobbins 7, 7a, respectively. wired in parallel.

Reference numeral 9 denotes a mover disposed in the center of the yoke 1. The mover 9 has magnetic pole pieces 11, 11a attached to both ends of a ring-shaped permanent magnet 10 magnetized in the axial direction. Sound absorbing materials 12, 12a such as rubber are attached to both ends of the pieces 11, 11a, and these are integrally supported and fixed to a shaft 13. The shaft 13 is supported by the yoke 1 via bearings 6 and 6a.

Further, in the above drive device, the magnetic pole piece 11
and 11a are the annular portions 14 and 14, respectively.
The inner surface of the side yokes 4, 4a is formed to have a similar shape to the tapered parts 15, 15a.

The operation of the above configuration starts with the electromagnetic coil 8
and 8a, the S pole is on the magnetic pole part A of the center yoke 3, and the magnetic pole part B, C of the side yokes 4, 4a.
When energized so that a north pole is generated in the magnetic pole piece 11
is magnetically repulsive with the magnetic pole piece B, while the magnetic pole piece 11
a is magnetically attracted to the magnetic pole portion C.

From this, a thrust force is applied to the movable element 9 in the direction of the arrow E shown in the figure. In addition, the electromagnetic coils 8, 8a
When the energization direction is reversed, a similar magnetic relationship occurs, and a thrust force is applied to the movable element 9 in the direction of arrow F in the figure.

The door lock actuator described above solves the drawbacks of the door lock actuator using the electromagnetic solenoid.

However, this door lock actuator has a drawback in the structure of the mover. This drawback will be explained based on FIG.

Here, FIG. 2 is an enlarged vertical sectional front view of the movable element of the door lock actuator shown in FIG. 1.

Since the sound absorbing materials 12 and 12a of the movable member 9 are fixed to the shaft 13 with adhesive, the bonding requires time and labor and has the disadvantage of poor workability.

This invention eliminates these drawbacks,
It is an object of the present invention to provide a door lock actuator that can easily and firmly fix the sound absorbing material of the mover.

The feature of this invention is that two electromagnetic coils are arranged in a yoke whose longitudinal end face is approximately E-shaped so that the same polarity occurs in adjacent parts, and in the center of the yoke,
A mover formed by holding magnetic pole pieces consisting of an annular part and a truncated conical part having approximately the same outer diameter as the permanent magnet at both ends of a ring-shaped permanent magnet magnetized in the axial direction. In a door lock actuator having a reciprocating drive device which is movably arranged and in which inner circumferential surfaces on both sides of the yoke are formed in a shape substantially similar to the truncated conical portion of the magnetic pole piece, the shaft insertion of the sound absorbing body of the movable element is provided. The actuator for a door lock includes a convex portion provided on the inner circumferential surface of the hole, and the convex portion is fitted into a circumferential groove bored in the outer circumferential surface of the shaft.

Embodiments of the present invention will be described below based on the drawings.

Here, FIG. 3 is an enlarged longitudinal sectional front view of the movable element of the door lock actuator according to one embodiment.

In this figure, parts equivalent to those in FIGS. 1 and 2 are designated by the same reference numerals. 16 and 16a are sound absorbing materials made of an elastic material such as rubber, and 17 and 17a are convex portions formed on the inner peripheral surfaces of the shaft insertion holes 18 and 18a of the sound absorbing materials 16 and 16a, respectively. 19 is the axis of the mover 9,
20 and 20a are circumferential grooves bored in the outer circumferential surface of the shaft 19, respectively.

In the above configuration, the shaft 1 of the sound absorbing material 16, 16a
9 is fixed to the shaft insertion hole 1 of the sound absorbing material 16, 16a.
8 and 18a are inserted into the shaft 19, since the sound absorbing materials 16 and 16a are elastic bodies, they are easily deformed and inserted into the shaft insertion holes 18 and 18a. 17a are fitted into circumferential grooves 20 and 20a formed in the outer peripheral surface of the shaft 19, respectively, and are firmly fixed.

As explained above, in the door lock actuator according to this embodiment, the sound absorbing material 1 is attached to the movable element 9.
2, 12a are installed using convex portions 17, 17a on the inner peripheral surfaces of the shaft insertion holes 18, 18a of the sound absorbing materials 12, 12a.
A circumferential groove 2 formed on the outer circumferential surface of the shaft 19
0.20a.

Therefore, there is no need for bonding with an adhesive as in the conventional case, and the workability is good and the installation is strong.

As described above, the present invention can be expected to provide a door lock actuator that can securely and easily fix the sound absorbing material of the mover, and is a device with excellent practical effects. It can be said that.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the drive unit of a conventional door lock actuator, Fig. 2 is an enlarged longitudinal sectional front view of its mover, and Fig. 3 is a movable door lock actuator according to an embodiment of the present invention. It is an enlarged front view of a child. 1... Yoke, 8, 8a... Electromagnetic coil, 9... Mover, 10... Permanent magnet, 11, 11a... Magnetic pole piece, 1
6, 16a...Sound absorbing material, 17, 17a...Protrusion, 1
8, 18a...Shaft insertion hole, 19...Shaft, 20, 20a
...Circumferential groove.

Claims (1)

[Scope of utility model registration request] Two electromagnetic coils are arranged in a yoke whose longitudinal end face is approximately E-shaped so that the same polarity occurs in adjacent parts, and a ring magnetized in the axial direction is placed in the center of the yoke. At both ends of a shaped permanent magnet, a movable element holding magnetic pole pieces consisting of an annular part and a truncated conical part having an outer diameter approximately equal to that of the permanent magnet is disposed to be movable in the axial direction, and the yoke is movable in the axial direction. In a door lock actuator having a reciprocating drive device in which inner circumferential surfaces on both sides are formed in a shape substantially similar to the truncated conical portion of the magnetic pole piece, a convex portion is provided on the inner circumferential surface of the shaft insertion hole of the sound absorbing body of the mover. An actuator for a door lock, characterized in that the convex portion is fitted into a circumferential groove bored on the outer peripheral surface of the shaft.