Patent ID: 6897391

Claim:
An electric membrane switch, suitable for selectively delivering seven control signals with which to control other such differentiated operations, of the type comprising a membrane ( 11 ) on one or more areas on which one or more pushers act and which has associated contacts susceptible to closing an electric circuit when said membrane ( 11 ) is shifted, generating an electric signal, and to opening said circuit when it elastically returns to a standstill position, characterized by comprising a laminar membrane ( 11 ) element on one side of which nine support means ( 12 , 13 a , 13 b ) of eight actuator means ( 14 a , 14 b ) and a piston ( 21 ) element are arranged, the latter in central position ( 12 ) and the remaining ones ( 13 a , 13 b ) distributed around it, each one associated to a corresponding contact, said actuator means ( 14 a , 14 b ) being constituted by several pins ( 14 a , 14 b ) susceptible to being actuated individually in pushing against said membrane ( 11 ) as from a piston ( 21 ) element, the central pin as from a cap ( 32 ) with four pins ( 33 ), said pins being supported on the rounded ends of four of said pins ( 14 b ), the four remaining pins ( 14 a ) being actuated in pairs by the arms ( 25 ) of a crosspiece ( 24 ) finished in slanted ramps ( 26 a , 26 b ), the cap ( 32 ) and crosspiece ( 24 ) being actuated from a single rod ( 28 ) element passing through them and coupled to them, said rod ( 28 ) element being finished by an actuation member ( 42 ).