Patent ID: 8878083

Claim:
A button key assembly, comprising: a frame; a plurality of button keys connected to said frame via a plurality of resilient supports such that said plurality of button keys are resiliently movable, wherein said plurality of resilient supports, said plurality of button keys, and said frame are integrally formed, and each of said plurality of button keys includes an engagement portion that projects therefrom; and a case including a button hole formed therein, said case being assembled to said frame such that said plurality of button keys are received in the button hole; wherein said plurality of button keys are spaced apart by a first gap before said plurality of button keys have been received in the button hole; wherein said plurality of button keys are spaced apart by a second gap after said case has been assembled to said frame such that said plurality of button keys are received in the button hole and such that the engagement portion abuts an inner wall of the button hole, the second gap being smaller than the first gap; and wherein the engagement portion projects in a direction substantially perpendicular to a direction in which said plurality of button keys are depressed.