Membrane switch

Abstract

The invention provides a membrane switch comprising an upper substrate, a partition plate and a lower substrate which are sequentially arranged from top to bottom; a first through hole penetrating through the partition plate is formed in the partition plate, a cavity defined by the hole wall of the first through hole, the lower surface of the upper substrate and the upper surface of the lower substrate forms a pressing air cavity, and electric conductors are arranged in the pressing air cavity; the electric conductors are arranged on the surfaces of the opposite sides of the upper substrate and the lower substrate; the partition plate is connected with the upper substrate and the lower substrate in a sealed mode; the lower substrate is provided with second through holes communicating the pressing air cavity with the outside, the outer walls of the electric conductors are provided with isolation layers, and conduction of the upper electric conductors and the lower electric conductors is achieved through mutual contact of the isolation layers; therefore, the pressing air cavity is communicated with the outside only through second through holes, the communication distance is short, the drainage and exhaust efficiency is high, the pressing comfort is good, and the drainage performance is good; the electric conductors can be isolated from air and water in the pressing air cavity through the isolation layers, oxidation and corrosion of the electric conductors are avoided, and the technical effect that the original function is restored after water is drained is achieved.

Description

technical field [0001] The invention relates to the technical field of electric switches, in particular to a membrane switch. Background technique [0002] Membrane switch is a new type of electronic switch, which is used to control the on-off of the circuit where it is located. It is widely used in the assembly of various key panels, computer keyboards and other products. Most of the existing membrane switches include: upper and lower substrates, formed between the upper and lower substrates The pressing air chamber, the conductor located in the pressing air chamber and arranged on the surface of the upper and lower substrates opposite to each other, when the membrane switch is pressed, the upper and lower substrates are deformed, and the pressing air chamber is compressed, so that the conductor is connected to the circuit where the membrane switch is located, realizing signal output. [0003] For this type of membrane switch, in order to achieve compression and rebound of...

AI Technical Summary

Problems solved by technology

[0004] 1. The pressing air cavity is connected to the airway. When the airway is compressed, the air pressure in the pressing air cavity will increase, and a large force is required to press the substrate to realize the compression of the pressing air cavity, and the use comfort is poor;

[0005] 2. Once the water enters the pressing air cavity through the air passage, it is difficult to discharge, and it is easy to corrode the conductor in the pressing air cavity, resulting in poor contact, and in severe cases, it will also lead to permanent failure of the membrane switch function

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