Patent ID: 7138593

Claim:
A keytop component for use in a keytop support member to press a key switch when the keytop component is pressed down, the keytop component comprising: a base member mounted upon said keytop support member; and a keytop member mounted upon said base member, said keytop member including: a first surface configured to be pushed by a user; a second surface configured to abut a surface of said base member; and a pair of resilient engagement members that protrude beyond the second surface, said base member including: a pair of engagement receiving parts to be engaged by the pair of engagement members so as to detachably hold the keytop member; a locking section to lock the base member to the keytop support member; and a projection member extending downward under the base member and configured to press the key switch when the base member is pressed down, each of said engagement members including, at a tip end part thereof including a tip end of said engagement member, an engagement part for engagement with one of said engagement receiving parts corresponding thereto, said engagement part including a first sloped surface extending from said tip end toward a root part of said engagement member and a second sloped surface formed behind said first sloped surface when viewed from said tip end of said engagement member, such that said first and second sloped surfaces form together a trapezoidal shape for said engagement part such that said engagement member increases a thickness thereof in correspondence to said first sloped surface in a direction from said tip end toward said second sloped surface and decreases the thickness thereof in correspondence to said second sloped surface in a direction from said first sloped surface to said root part of said engagement member, said locking section including a hook engaging with a rear surface of said keytop support member at a side of said keytop support member away from a side facing said base member.