SU858130A1 - Push-button switch - Google Patents

Description

(54) BUTTON SWITCH

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The invention relates to electrical engineering and can be used in electrical circuits, for example, a light-switching circuit, a reversing lamp in automobiles.

Known pushbutton switch, comprising a housing with a hole, a button inserted into the hole of the housing, the electrical contacts and the membrane 1.

Also known is a pushbutton switch comprising a housing with a hole, a button inserted into the opening of the housing, a shell and stationary contacts and a spring-loaded bridge of conductive material with moving contacts and a membrane located between the button and the contacts t.

However, the well-known pushbuttons to the bees have low reliability due to the low dielectric strength and can not work at enough: low temperatures.

The purpose of the invention is to increase reliability by increasing the dielectric strength and extending the temperature range of operation.

For this purpose, in a button switch, comprising a housing with an opening, a button inserted into the opening of the housing, the shell and the fixed contacts located therein and the spring-loaded bridge of the conductive

10 of a material with movable contacts and a membrane located between the button and the contacts, a membrane of polyethylene made of rubber-fabric material with an arrangement of a layer of fabric between the layers

IS rubber, with the above-mentioned layers having a thickness ratio of 1: 2: 1, and the place of membrane fixing around the periphery is performed in the form of a Z-shaped lock.

20

In mg J, a general electrical circuit diagram with a push-button switch is shown; FIG. 2 - pushbutton switch, obtion view.

3

Terminals I ,. to which the car's reverse light is connected, are connected to a current source (battery) 2 through switch 3,

The switch has a shell A of insulating material, in which there are two pairs of contacts: fixed contacts 5 and 6 and movable contacts 7 and 8 placed on bridge 9 of conductive material which is pressed by spring 10 supported on bottom 11 of shell 4, Spring 10 It is intended for the electrical connection of the contacts 5 and b through the bridge 9 with the contacts 7 and 8.

The open end of the sheath 4 is sealed by a metal body 12, which is folded around the periphery. The housing 12 with the neck 13 is provided with an axial through4 hole 14 In the axial hole 14 with a slide-mounted pin 15 of the button 16, which ends with a head 17,

Between the button and the contacts there is a membrane 18 made of rubber-fabric material, which has an optimum thickness of 0.3-0.5 mm. A membrane is installed between the shell 4 and the body 12 and separates the air cavity with the contacts from the oil cavity with the button. The fixing place 19 of the membrane is made 2 shaped.

One side of the membrane 18 is in contact with the head I7 of the button 16, the second side is in contact with the expanded end 20 of the piston 21, which abuts the bridge 9. The piston 21 is installed freely for axial movement in the opening of the disk 22, which is clamped along the periphery together with the membrane 18 between the shell 4 and housing 12.

The push button switch works in the following way.

04

In the absence of additional free-flowing discharges, the spring 10 presses the button 16 through the bridge 9, the piston 21, the membrane 18 and the head 17. In this case, Joseph 9 provides the electrical connection between the fixed contacts 5 and 6.

When the force is applied to the button 16, the membrane 18 transmits the force to the bridge 9, the opening and the fixed contacts. When button 16 is released, all elements return to their original position.

Fochshula invention

A pushbutton switch comprising a housing with a button opening, inserted into the opening of the housing, the shell and stationary contacts and a spring-loaded bridge of conductive material with moving contacts and a membrane located between the button and the contacts, characterized in that, in order to improve reliability increase dielectric strength and dissolve the temperature range of operation; the membrane is made of rubber-fabric material with the fabric layer located between the rubber layers, with the said layers it has a thickness ratio of 1: 2: 1, and the place of the fixed membrane on the periphery is made in the vnde Z-shaped lock

Sources of information taken into account in the examination

1. Patent Fradsdai 2078215, cl. H 01 H 13/00, 1971.

2. The UK patent number 1.116.030, cl. H 1, 1968.

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Claims (1)

Claim Pushbutton Switch, comprising a housing with a hole; ' a button inserted into the opening of the housing, the shell and the fixed contacts placed therein and a spring-loaded bridge of conductive material with movable contacts and a membrane located between the button and the contacts, characterized in that, in order to increase reliability by increasing the dielectric strength and expanding the temperature range of operation the membrane is made of rubber-fabric material with the location of the fabric layer between the rubber layers, while the said layers have a thickness ratio of 1: 2: 1, and the membrane is attached s peripherally configured as a Z-shaped lock.