SWITCHING UNIT

摘要

A switching unit comprises a waterproof housing; an integrated circuit sensing element mounted within the housing, said sensing element operative to sense pressure applied to the housing; and means for communicating the output of the sensing element to external circuitry. Such a switching unit has no moving parts and can be manufactured by moulding techniques to produce a switching unit that is virtually impervious to external environmental conditions and thus is more reliable and has a longer working lifespan than conventional mechanical push switches mounted behind flexible membranes.