Pressure sensing switch with conductive deflectable diaphragm

摘要

A pressure sensing switch for transducing the change of pneumatic pressure to an electrical signal comprises a diaphragm made of a material having a Young's modulus E of 1.0x104-2.1x104 kg/mm2, a Poisson's ratio V of 0.3, a thickness t of 0.02-0.2mm, a diameter d measured at a radially inner edge of a side wall portion being 5-10mm, a ratio of a radius or curvature R measured at a deflectable portion to a diameter d measured at the radially inner edge of the side wall portion being 2.5-5, and a maximum deflection Dmax of the deflectable area being <IMAGE>