Patent ID: 8503158

Claim:
A key button mechanism, comprising: a base body; a protective piece assembled to the base body and comprising two actuating portions; and a key button partially attached to the base body and aligning with the protective piece; the key button comprising a key body, an elastic arm and two resisting blocks, the elastic arm formed on the key body and positioned on the base body for providing a returning force to the key button as the key button is pressed in use; the two resisting blocks respectively positioned at two sides of the elastic arm and configured to align with and abut against the corresponding two actuating portions of the protective piece; wherein the base body includes a side wall, a cut out defined through the side wall, and an accommodating groove recessed from an outer surface of the side wall and communicating with the cut out; the protective piece is received within the cut out of the base body; the key button is attached to and partially accommodated within accommodating groove of the base body; the base body further includes a post formed on the base body and located adjacent to the cut out; the protective piece further includes a hinged portion positioned between the two actuating portions, the hinged portion defines a hinged hole and is hinged to the post of the base body; the two actuating portions and the hinged portion cooperate to form an accommodating space; a projection protrudes from an inner surface of the side wall and is configured corresponding to the accommodating space of the protective piece, the post extends from the projection.