Switch structure for making keyboards and keyboards using such a structure.

摘要

The structure according to the invention comprises a substrate (10) carrying at least one pair of fixed contacts (C, C'), an elastic membrane (12) covering the substrate (10) and having a hollow boss (13) and a conductive element (14) arranged in the concavity of the boss (13) and integral with the latter. The boss (13) is prolonged by a transmission part (15) whose end slides in a perforation (16) of a guide part (2) which has a recessed orifice (18). The part (2) is covered by a sheet of semi-rigid material (20) which has a domed cap-shaped form (21) serving as key and onto which the part (15) abuts. The invention makes it possible to effect accurate guiding of the conductive element (14) which serves as movable contact bridge and to render independent the elastic return means and the means serving to produce the touch effect. <IMAGE>