CAPACITIVE SENSITIVE KEY STRUCTURE

摘要

A capacitive sensitive key structure includes a key, support component, fixing pad, substrate and conductive portion. The key includes a key body and a connection wall which encloses a receiving space. The support component is disposed in the receiving space and includes a body, conical wall, buffering space, and extending pad connected to the conical wall. The body abuts against the key body. The conductive portion is disposed at the bottom of the body and inside the buffering space. The substrate is connected to the fixing pad and has thereon a circuit unit and a sensing layer. The substrate is coated with an insulating layer which covers the sensing layer. When the key body is pressed to press against the support component, electrostatic changes occur because of changes in the distance between the conductive portion and the sensing layer; hence, the circuit unit sends electrical signals for driving electronic apparatuses.

主权项

1. A capacitive sensitive key structure, comprising:
at least a key comprising a key body and a connection wall connected to the key body and adapted to deform when pressed against by the key body, thereby enabling the key body to move; a fixing pad connected to the connection wall, wherein a through hole is disposed at the fixing pad, corresponds in position to the key body and penetrates the fixing pad; a substrate connected to a side of the fixing pad, wherein a circuit unit and a sensing layer coupled to the circuit unit are disposed at the substrate and correspond in position to the through hole; and a conductive portion disposed between a bottom of the key body and the substrate and corresponding in position to the sensing layer from above, wherein, when the key body is pressed and moved to drive the conductive portion to move and separate from the sensing layer by a predetermined distance, electrostatic changes occur between the conductive portion and the sensing layer such that the circuit unit sends an electrical signal for driving a function of an electronic apparatus.