JPS5894718A - Push switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bushing switch, and more particularly, to a bushing switch that has a built-in permanent magnet and an electromagnet and can be miniaturized.
do.

Conventionally, it was turned on (or off) by the first knob button.
There are various types of button switches that use a mechanical launch mechanism that turn off (or turn on) when the second button is pressed, but because they are mechanical latching mechanisms, they are difficult to miniaturize, and /pu stroke also tended to be large.

The present invention has been made in view of such conventional problems, and provides an electromagnetic latch mechanism that utilizes the magnetic repulsion between a permanent magnet and an electromagnet to enable push-on (or push-off). The object of the present invention is to provide a bushing switch that has a small stroke and can be downsized.

The present invention will be explained in detail below along with illustrated embodiments.

In FIGS. 1 to 3, 1 is a knob, and 2 is a case. The knob L is fitted into a circular hole on the top surface of the case 2 so as to be able to come in and out, and is constantly urged outward by a coil spring 3. , the flange 1a on the periphery of the knob 1 is of the case 2! H
It is engaged with I2a and is prevented from coming off. An electromagnet 4 composed of a yoke 4a and a coil 4b is provided at the center bottom of the case 2, and a permanent magnet 5 is provided at the center of the coil 4b. Above the yoke 4a of the electromagnet 4 is an armature 6.
are opposed to each other, and a slider 6a provided on the outer periphery of the armature 6 is slidably fitted on the outer periphery of the yoke 4a. A coil spring 7 is interposed between the armature 6 and the yoke 4a. The strength of the coil spring 7 is set to such an extent that it yields to the magnetic attraction force when the armature 6 is close to the permanent magnet 5, but can resist the attraction force when it is away from the permanent magnet 5. There is. When the armchair is separated from the permanent magnet 5 and volatilized upward by the spring 7, it is in elastic contact with the protrusion 1b at the center of the lower surface of the knob 1. The bottom of the case 2 has a coil energizing terminal 8.9 and a fixed switch terminal 10.1.
1 is provided.

The terminals 8 and 9 each have spring properties, and the contact portion 8 at the upper end of each
a, 9a is a projection 1c on the periphery of the lower surface of the knob 1;

1d, and the center portions of the respective inclined portions 8b, 9b in the case 2 are in contact with the slider 6a of the armature 6. A movable contact 12.13 is attached to the armature 6 so as to face the fixed terminal 10.11. 14 is a conductor ring provided over the entire length of the inner peripheral surface of the knob 1. Further, 15 and 16 are terminals of the coil 4b, respectively.

The bush switch with the above configuration is initially in the state shown in FIGS. 1 to 3, with the knob l protruding from the case 2 due to the force of the spring 3, and the armature 6 being separated from the permanent magnet 5 due to the force of the spring 7. It is in contact with the protrusion 1b of the knob l. Furthermore, since this embodiment is an example of push-on and push-off, the contacts 12.13 are separated from the fixed terminals 10.11, and the switch itself is in an off state. Furthermore, the coil 4b is not energized.

In this state, when the knob 1 is pushed in against the force of the spring 3 as shown in FIG. 4, the armature 6 is pushed down by the protrusion 1b and comes into contact with the permanent magnet 5 against the force of the spring 7. . At the same time, the slider 6a of the 7-1 chain Aero presses and bends the inclined portions 8b and 9b of the terminals 8 and 9. Contacts 12.13 each make contact with the contacts of terminal 10.11 to turn on the switch.

When knob 1 is released in this state, knob l will appear as shown in Figure 5.
is returned to its original state protruding from the case 2 by the force of the spring 3. However, armature 6 is spring 7
It is attracted to the permanent magnet 5 against the force of , and maintains that state, so the switch remains on. In this return operation of the knob 1, the inclined portions Bb of the terminals 8 and 9;
gb goes from being pushed and bent by the slider 6a to being pushed and spread when the contact portions 8a and 8b at the tips are released.

Next, push in the knob 1 again as shown in Figure 6, and the terminal 8,
The contact portions 8a, 8b of 9 are connected to the ring 1 on the periphery of the lower surface of the knob 1.
4, the terminals 89 are short-circuited through the ring 14, and the coil terminals 15.1
A current flows between the magnets 6 and the electromagnet 4 is excited.

When the knob l is released from the state shown in Fig. 6, the magnetic force of the electromagnet 4 cancels out the magnetic force of the permanent magnet 5, and the force of the spring 7 cancels out the magnetic force of the permanent magnet 5.
- The machiner 6 returns to the state shown in FIG. 2, and as shown in FIG. 3, the movable contact 12.13 separates from the fixed terminal 10.11 and the switch is turned off.

At the same time, by sliding the 7-mm machiner 6 upward, the inclined portion 8b,
The coil current-carrying terminal 8°9, from which the pressure of gb has been released, returns to the position where the contact portions 8a, 9a at the tip thereof engage again with the protrusions lc, ld of the knob l. In this way, everything is returned to its initial state again, and the button-on and button-off operations are completed.

In the above embodiment, the switch is turned on by the first push of the knob, and turned off by the second push.
Although a button switch with button-off operation is shown, the movable contact 12, 13 is brought below the contact of the fixed terminal 10, 11, so that both contacts are in contact in the initial state shown in Fig. 3. If this is done, a bushing switch with a bushing-off and bushing-off operation can be obtained in which the first bushing turns off and the second bushing turns on. In addition, if the terminals 15 and 16 are simply connected to an external circuit so that the electromagnet 4 is directly controlled from the outside without providing the coil energizing terminals 8, 9, ring 14, etc., it is possible to turn off the switch by external operation (
or on), and furthermore, these terminals 8
, 9, ring 14, etc., if the electromagnet 4 is directly connected to an external circuit, it becomes possible to release the switch both by operating the knob and by external operation.

In particular, if the external circuit includes a switching element such as a transistor, automatic switch release is possible.

As described above, the present invention makes it possible to turn on or off the switch by pushbutton operation using a combination of a permanent magnet and an electromagnet. It has the advantage that it can be made smaller and the stroke of the knob can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the present invention, FIG. 2 is a front sectional view of the same, and Il! FIG. 3 is a side sectional view of the same as the above, and FIGS. 4 to 6 are front sectional views showing the operating state of the same. l...knob, 2...case, 3...spring,
4... Electromagnet, 5... Permanent magnet, 6... Armature, 7... Spring, 10.11... Fixed terminal, 12.13... Movable contact patent applicant Tokai Rika Denki Co., Ltd. Manufacturing site Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] The knob is fitted into the case so that it can move in and out, and a spring interposed between the two applies a force that constantly pushes the knob outward from the case.A permanent magnet and an electromagnet are provided inside the case, and the knob is pushed in. An armature that is attracted to a permanent magnet is disposed between the armature and the permanent magnet, and when the armature is in contact with the permanent magnet, it yields to the attraction force, and when the armature is away from the permanent magnet, it yields to the attraction force. A spring with a force capable of resisting the attractive force is fully interposed, and the electromagnet has an excitation force that separates the armature from the permanent magnet, and this electromagnet is connected to excitation means, and the armature is connected to a fixed electrode in the case. A bushing switch is characterized in that it is provided with a movable contact that contacts and releases.