Button membrane switch layer, button and keyboard

Abstract

The invention provides a key membrane switch layer, a key and a keyboard. The key membrane switch layer comprises a first membrane circuit layer, a second membrane circuit layer and an isolation layer, wherein the first membrane circuit layer is provided with first contacts, a first connecting line, a second connecting line and a first external connecting line, and the first contact is respectively electrically connected to the first external connecting line through the first connecting line and the second connecting line; the second membrane circuit layer is provided with second contacts, a third connecting line, a fourth connecting line and a second external connecting line, and the second contact is respectively electrically connected to the second external connecting line through the third connecting line and the fourth connecting line; the isolation layer is provided with through holes and is arranged between the first membrane circuit layer and the second membrane circuit layer, wherein the through holes are respectively corresponding to the first connecting line, the second connecting line, the third connecting line and the fourth connecting line. According to the key membrane switch layer, the key and the keyboard, a problem of abnormal circuit conduction caused by oxidative break of a circuit wire can be overcome.

Description

technical field [0001] The invention relates to the field of keyboards, in particular to a membrane switch layer of keyboard keys. Background technique [0002] With the development of social economy, computers have been more and more widely used. And along with people more and more diversified use to computer, the use of the most frequently used computer keyboard when operating computer is also more and more popular. [0003] There are two types of keyboard keys currently designed: one is the keyboard key of the crater structure, which is mostly used to match the large keyboard used in the desktop computer, and it feels better, but it is relatively thick and bulky; The keyboard keys are mostly used in compact products such as notebook computers and personal digital assistants. They are relatively light and thin, and feel worse than the crater type. In the market, the above two structures both adopt the form of a membrane switch to realize conduction and cutoff. see figu...

AI Technical Summary

Problems solved by technology

In actual operation, see figure 2 The circuit wire 433a is in contact with the edge of the through hole 421a at the first position L, so that the part of the circuit wire 433a connected to the conductive contact 432a is exposed in the through hole 421a, and the through hole 421a is easy to gather moisture, which will Oxidation or even disconnection of part of the circuit wire 433a exposed in the through hole 421a

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