Membrane for key switch and the key switch

摘要

The present invention provides a key switch diaphragm capable of obtaining a good click feeling and capable of avoiding contact failure and having a high durability. A key switch diaphragm 30 comprises a thin plate having flexibility and conductivity, and the key switch diaphragm 30 includes a truncated pedestal 16 , and a spherical domical portion 18 being raised toward an upper portion of the pedestal 16 on the side of the upper portion of the pedestal 16 . The domical portion 18 is provided at its substantially central portion with an outwardly raised portion 32 being raised toward an outer surface of the domical portion 18 . An edge of the outwardly raised portion 32 on the side of its inner surface forms a contact 34.