JPS606973Y2 - push button switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a push button switch constructed by using rubber as a spring and adding metal contacts.

A conventional push button switch using rubber as a spring is constructed as shown in FIG.

In FIG. 1, 1 is a push button, and 2 is a movable contact holder made of rubber with an integrally sealed upper end, and the push button 1 faces the sealing upper end surface of the movable contact holder. A movable contact 3 made of conductive rubber is fixed to the inner surface, and a pair of fixed contacts 5 are fixed to a base 4 supporting the movable contact holder 2, which is short-circuited by the movable contact 3 when the movable contact is lowered. By pressing the push button 1, the movable contact 3 short-circuits the fixed contact 5 and turns the switch on.

Note that 6 is a switch holder.

However, as mentioned above, in conventional pushbutton switches, conductive rubber is used for the movable contacts, so the maximum
It is only possible to interrupt and connect a current of about TIA (internal resistance 50Ω), and when directly interrupting and discontinuing a current of about 1 to 2 A, it is necessary to amplify the contact capacity by using a relay or the like.

For this reason, there has been a demand for a push-button switch as described above that can directly turn on and off a current of about 1 or more.

The present invention is based on the above considerations, and aims to provide a high current capacity pushbutton switch by maintaining and utilizing the elasticity of the comb and using metal contacts for the movable contacts. Hereinafter, the present invention will be explained by way of examples.

FIG. 2 is a longitudinal sectional view of a pushbutton switch according to an embodiment of the present invention.

Reference numeral 10 denotes a movable contact holder made of rubber and having an open upper end and a barb-shaped cross section. Inside the movable contact holder 10, a flange-like protrusion 11 for holding the movable contact is formed integrally with the movable contact holder 10. A movable contact 12 made of metal is fitted onto the flanged protrusion 11.

In addition, the upper part of the movable contact holder 10 has a trapezoidal recess 2.
3 is formed, and the press bar 13 is fitted into this recessed part 23.

On the other hand, a pair of fixed contacts 15 and 16 are fixed on a base 14 made of an insulator fixed to the lower end surface of the movable contact holder 10, facing the movable contact 12 and spaced apart from each other by a predetermined distance.

When no pressing force is applied to the push bar 13 of the pushbutton switch having the main body configured as described above, the switch is in the state shown in FIG. 2, and the movable contact 12 and the fixed contacts 15 and 16 are in a non-contact state. .

Next, when a pressing force is applied to the pressing bar 13, the movable contact holder 10 bends at approximately the center thereof, as shown in FIG. Moderation 17 occurs and the movable contact 12 becomes the fixed contact 15
and 16, and when a sufficient pressing force is applied to the pressing bar 13, the detent 17 becomes deeper as shown in FIG. is short-circuited by the movable contact 12 and becomes switched on.

In this case, due to the deepened moderation 17, the concave portion 23 is the third
As shown in Figure C, the deformation occurs from the broken line to the solid line, and sufficient contact pressure of the movable contact 12 to the fixed contacts 15 and 16 is maintained.

Next, when the pressing force of the pressing bar 13 is released, the movable contact holder 10 returns from the state shown in FIG. 3C to the state shown in FIG. 2 in the order of FIGS. 3b and 3a.

As described above, the movable contact holder 10 and the flanged protruding body 11 are integrally molded with rubber, and the movable contact 12 made of metal is fitted and fixed to the flanged protruded body 11, so that conventional conductive rubber can be used as a movable contact. It is possible to open and close at a higher current compared to the conventional type, and since the elasticity of the comb is used to ensure click action, it is possible to apply uniform contact pressure with less chattering.

Next, an illuminated pushbutton switch to which an embodiment of the present invention is applied will be described.

FIG. 4 is a longitudinal sectional view of an illuminated pushbutton switch to which an embodiment of the present invention is applied.

In FIG. 4, the pushbutton switch according to the embodiment of the present invention shown in FIG. 2 is used as the switch main body.

18 is a pressing knob, and 19 is a knob core, which is integrally formed with the pressing knob 18 and the knob core 19 at the upper part of a holder 20 having a U-shaped cross section.

A pressing bar 13 for pressing the movable contact holder 10 is integrally provided at the lower end of the holder 20.

Note that the knob 18, knob core 19, and holder 20 are made of transparent members.

Note that a push button switch shown in FIG. 2 is housed below the push bar 13.

Reference numeral 21 denotes a case for the illuminated pushbutton switch, which houses the holder 20 and the pushbutton switch shown in FIG.

On the other hand, an illuminated lamp 22 is fixedly attached to the surface of the case 21 of the illuminated push button switch corresponding to the opening of the holder 20.

By pressing the knob 18, the holder 20 slides inside the case 21, and the press bar 13 at the tip of the holder 20 is pressed, and the push button switch operates in the same way as described in the previous embodiment. The switch is turned on.

As explained above, according to the present invention, a metal contact can be used, a current of about 1 to 2 A can be directly interrupted and connected, and the elasticity of the rubber used for the movable contact holder allows for click action. It is possible to maintain uniform contact pressure between the fixed contact and the movable contact due to the elasticity of the rubber.

It also has a sense of moderation when turned on. Furthermore, the cushioning effect of the rubber reduces chattering when the contacts are opened and closed.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of an example of a conventional pushbutton switch, Fig. 2 is a longitudinal sectional view of a pushbutton switch according to an embodiment of the present invention, and Fig. 3 is a longitudinal sectional view of an example of a pushbutton switch of the present invention. Diagram provided for explanation. FIG. 4 is a longitudinal sectional view of an example of an illuminated pushbutton switch in which the pushbutton switch according to the embodiment of the present invention is applied. 10... Movable contact holder, 11... Flange-like protrusion, 12... Movable contact, 13...
・Press bar, 14...Base, 15.16...
... Fixed contact, 17 ... Moderation.

Claims (1)

[Scope of utility model registration request] A movable contact holder, which is made of a rubber member formed into a hollow shape and has a flanged protruding body that holds a movable contact described later inside thereof integrally formed therein, and a forest-like recessed part formed on the upper surface, and the movable contact. a metal movable contact having a T-shaped head fitted into the flanged protrusion of the holding body; and a pressing bar fitted into the recessed portion of the movable contact holding body for applying pressing force. , a base made of an insulating material that supports the lower part of the movable contact holder and has a pair of fixed contacts fixed on the surface facing the movable contact at a predetermined interval, and applies a pressing force to the pressing bar. 1. A pushbutton switch, wherein the movable contact short-circuits the pair of fixed contacts when the movable contact is applied.