Key switch mechanism and membrane actuator

Details Key switch mechanism and membrane actuator Key switch mechanism and membrane actuator

H - Electricity

01

H

306/308

H01H 13/52 (2006.01) H01H 13/705 (2006.01)

Patent

CA 2009246

KEY SWITCH MECHANISM AND MEMBRANE ACTUATOR ABSTRACT OF THE INVENTION A switch activator is described which is a unitary molded plastic molded coil spring and a pivot plate which pivots to act on a membrane switch when the coil spring buckles under load. The buckling of the spring is controlled by the relative placement of the axis of the spring and a pivot surface around which the top portion of the spring pivots as the spring buckles. The cross section of the spring member is limited in size so as to prevent the forming of a solid column upon compression, while at the same time accommodating the needs for molten plastic flow in the spring during molding.

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