Key unit of a keyboard

Abstract

An improved key unit of a keyboard comprising a key top, a keyboard plate and a conductive film; the conductive film being mounted beneath the keyboard plate; the keyboard plate has a mounting base comprising a hollow cylinder mounted thereon and the key top being mounted on the mounting base through the hollow cylinder. The key unit further comprises: (1) a lower portion of the key top having a stem extending therefrom; the stem having a blind hole therein and two symmetrical sides, the stem also having two salient blocks mounted on the two symmetrical sides; the mounting base having a mounting socket comprising two symmetrical guide grooves therein; beneath the two guide grooves, the mounting socket further comprising two stop-and-guide grooves being furnished and aligned to the guide grooves, but being slightly deeper than the two guide grooves, respectively; (2) a bottom portion of the stop-and-guide grooves in the mounting socket having a bias flange; and (3) a taper-shaped spring supported on the bias flange which is mounted between the stem and the mounting socket so as to retain the key unit in the stop-and-guide grooves.

Dependencies are inferred from the claim text.