Key sheet

Abstract

A thin-film-like key sheet covering pushbutton switches is equipped with a plurality of key tops constituting operating pushbuttons, and a film-like base sheet on an upper surface of which the key tops are placed, in which a depression load is small, and no interference with the adjacent key tops and a frame sheet occurs when depressing the key tops, thus avoiding undulating movement of those components. There is further provided a film-like shape maintaining sheet covering a lower surface of a base sheet and stacked on the base sheet, and the shape maintaining sheet has, at dividing positions between the adjacent key tops, insulating slits insulating a stress generated along a surface of the shape maintaining sheet when the key tops are depressed. Thus, the key tops do not easily rise or become shaky at a time of depressing operation.

Dependencies are inferred from the claim text.