JPH0526664Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a switch with a holding function used in a power window device of an automobile, etc.

(Prior Art) Conventionally, a switch with a holding function has a knob that is energized to an OFF state, a contact mechanism that is closed by the knob, an electromagnet that is energized by closing the contact of the contact mechanism, and the electromagnet. It consists of a suction plate attached to the knob that is suctioned to the knob. Then, the user operates the energized knob in the OFF state to close the contact and start a predetermined operation such as raising and lowering the power window, and at the same time, the electromagnet is energized to move the suction plate on which the knob is attached by the energizing force of the knob. By attracting the knob against the pressure, the knob is kept in the on state, the contact is closed for a certain period of time, and the predetermined operation is continued.

(Problem that the invention aims to solve) However, due to dimensional tolerances of parts, manufacturing errors, etc., mismatches occur between the magnetic pole faces of the suction plate and the electromagnet, so it is difficult to bring the magnetic pole faces of the suction plate and the electromagnet into close contact without any gaps. be. If there is a gap between the suction plate and the magnetic pole surface, the suction force will be weakened and it will succumb to the biasing force of the knob, making it impossible to maintain the holding function. Therefore, the capacity of the electromagnet must be increased with a safety factor in mind. The problem is that the electromagnet becomes larger and requires more power than necessary.

The present invention was devised in view of the above problems, and an object of the present invention is to provide a switch with a holding function in which the adsorption plate and the magnetic pole surface of the electromagnet are in close contact with each other, and the capacity of the electromagnet is small.

(Means for Solving the Problems) In order to solve the above problems, the present invention operates a knob that is energized to the OFF state to close a contact, and at the same time energizes an electromagnet provided on the knob. In a switch with a holding function that maintains a knob in an on state and closes a contact for a certain period of time by suctioning a suction plate, a lever provided integrally with the knob is provided with a lever that faces the magnetic pole surface of an electromagnet. A suction accommodation recess is formed, and a suction plate elastically supported and urged outward by a coil spring is housed in the accommodation recess.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a power window switch for an automobile according to the present invention, which roughly consists of a knob 1, contact mechanisms 2, 2, an electromagnet 3, and a casing 4 in which these are assembled. .

The knob 1 is assembled to the outside of a casing 4 so as to be able to swing freely around a support shaft 5, and has a tubular ball support portion 6 projecting from a bearing portion of the support shaft 5 in a direction perpendicular to the support shaft 5. A coil spring 7 is housed inside the ball support portion 6, and urges the ball 8 outward to press against a V-shaped inclined surface 9 provided on the casing 4. And the knob 1 has a coil spring 7
Due to the biasing force, the ball 8 is stabilized in a state located at the lowest part of the inclined surface 9, and is maintained in the off state.

Further, this knob 1 is provided with a lever 10 whose lower end is bifurcated from the bearing portion of the support shaft 5 and parallel to the ball support portion 6 . This lever 10
At both lower ends of the magnetic pole surfaces 18a and 1, respectively, which will be described later
Suction plate housing recesses 11, 11 having a substantially C-shaped cross section facing the suction plate housing recesses 11, 11 facing the suction plate housing recesses 9a, 20a, 21a are attached, and the suction plate housing recesses 11, 11 are biased outwardly by coil springs 12 and supported. The suction plate 13 is housed therein. The suction plates 13, 13 of the suction plate housing recesses 11, 11 are provided so as to face each other.

As shown in FIG. 2, the contact mechanisms 2, 2 are disposed symmetrically on both sides with respect to the spindle 5 of the knob 1 on the bottom surface of the casing 4, and each contacts the first movable contact 14.
A second movable contact piece 15a includes a second movable contact 15, and a third movable contact piece 16a includes a third movable contact 16. And the first movable contact piece 14a
a tip thereof is located behind the suction plate accommodating portion 11,
The second movable contact 15 faces the first movable contact 14, and the third movable contact 16 faces the second movable contact 15, and when the knob 1 is operated,
As shown in FIGS. 3 and 4, the suction plate housing section 11
presses the first movable contact piece 14a, and each contact 1
4, 15, and 16 are closed.

As shown in FIGS. 5 and 6, the electromagnet 3 is integrally provided at both ends of the iron core 17 in a direction perpendicular to the axis, and has magnetic pole surfaces 18a and 19a at the tip thereof on the same plane. A two-piece spool 23 is attached to a core 22 having magnetic pole parts 18 and 19 formed therein, and magnetic pole parts 20 and 21 having magnetic pole faces 20a and 21a similarly protruding at positions symmetrical to the magnetic pole parts 18 and 19. The coil 24 is wound around the coil 24 by sandwiching the two. This electromagnet 3 has magnetic pole faces 18a and 19a.
is attached to one suction plate 13 of the knob 1, the magnetic pole surface 20a,
The suction plate 21a is assembled to the bottom surface of the casing 4 so as to face the other suction plate 13.

In addition, in FIGS. 2 and 4, 25, 26,
27 are stoppers for the first movable contact piece 14a, the second movable contact piece 15a, and the third movable contact piece 16a, respectively.

In the power window switch constructed as described above, as shown in FIGS. 1 and 2, when the knob 1 is not operated, the ball 8 presses against the lowest part of the inclined surface 9 and stops, turning the knob 1 into the OFF state. is maintained. In addition, each contact piece 14a, 1 of the contact mechanism 2, 2
5a and 16a are stoppers 25 and 2, respectively.
6 and 27, and the contacts are in an open state.

As shown in FIGS. 3 and 4, when the knob 1 is pressed and operated, the ball support part 6 and the lever 10 rotate counterclockwise in the drawings around the support shaft 5, and the ball 8 is moved against the inclined surface 9. while pushing up lever 10.
The suction plate accommodating portion 11 at the right end in the figure presses the first movable contact piece 14a, first the first movable contact 14 and the second movable contact 15 are closed, and then the second movable contact 15 and the second movable contact 15 are closed. 3 movable contact 16 is closed.

Here, the first movable contact 14 and the second movable contact 15
When closed, the electromagnet 3 is energized and the adsorption plate 13
are simultaneously attracted to the magnetic pole faces 18a and 19a of the electromagnet 3, and the knob 1 is held in the on state. At this time, the electromagnet 3 moves to the suction plate 13 as shown in FIG.
When the magnetic pole faces 18a,
Since the suction plate 19a is formed flush with the suction plate 13
The magnetic pole surfaces 18a and 19a are in close contact with each other without any gaps. In addition, as shown in FIG.
Even if 19a is not parallel, the suction plate 13 is elastically supported by the coil spring 12, so
At the same time as it is attracted to the magnetic pole surfaces 18a, 19a, it is tilted parallel to the magnetic pole surfaces 18a, 19a, so that there is no uneven contact and there is no gap.

Further, when the second movable contact 15 and the third movable contact 16 are closed, a power window drive motor (not shown) rotates to move the door window up and down.

Then, when it is detected that the window is completely opened or closed, and the energizing circuit to the electromagnet 3 is cut off, the adsorption force of the electromagnet 3 disappears, and the ball 8 is pushed to the inclined surface by the urging force of the coil spring 7. 9 and stops at the lowest position, and the knob 1 moves down to the first position.
While returning to the OFF state shown in FIGS. 1 and 2, the contact mechanism 2 also returns to the open state shown in FIGS. 1 and 2.

In the above embodiment, the suction plate 13 is elastically supported by the coil spring 12, but it can be supported by an elastic member such as a leaf spring or rubber.

(Effects of the invention) As is clear from the above explanation, according to the invention, when the elastically supported adsorption plate is adsorbed to the magnetic pole surface of the electromagnet, it easily tilts and comes into close contact without any gaps, so the safety factor is predetermined. There is no need to increase the capacity of the electromagnet in anticipation of the above, and the electromagnet has the advantage of being smaller and reducing the power required.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an automobile power window switch which is an embodiment of the present invention in the OFF state, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view in the ON state, and Fig. 4. is a cross-sectional view taken along the line -5 in Fig. 3.
6 are cross-sectional views showing the adsorption state of the adsorption plate and the electromagnet. 1...knob, 2...contact mechanism, 3...electromagnet,
10...Lever, 11...Adsorption plate housing recess, 12
...Coil spring, 13...Adsorption plate, 18a, 19
a, 20a, 21a...Magnetic pole surface.

Claims (1)

[Scope of Utility Model Registration Claim] The knob is maintained in the on state by operating the energized knob in the off state to close the contact, and by energizing the electromagnet to attract the suction plate provided on the knob. In a switch with a holding function that closes a contact for a certain period of time, the lever provided integrally with the knob is formed with a recess for accommodating a suction plate facing the magnetic pole surface of the electromagnet, and a coil spring is inserted into the recess. 1. A switch with a holding function, which houses a suction plate which is elastically supported by being biased outwardly by a switch.