Patent ID: 8766123

Claim:
A key device, comprising a housing and a key structure, a hollow accommodating space in the housing, and the key structure comprising: a key body, at least part of the key body being in the hollow accommodating space, the key body having a proximal end that a user presses against to actuate the key and a distal end in the hollow accommodating space, a longitudinal axis extending between the proximal and distal ends; and a lateral contacting structure positioned within the hollow accommodating space and comprising a flexible member having a contacting portion and a squeezing portion, the contacting portion being at an outer side of the distal end of the key body, and when the key body is pressed, the distal portion of the key body moves along the longitudinal axis and against the squeezing portion to squeeze the squeezing portion in a radially outward direction and force the contacting portion into contact with a sensing element retained in the hollow accommodating space, wherein: the squeezing portion is a sole actor against the key body when the key body is unpressed to urge the key body along the longitudinal axis and support the key body in a loosened position where the contacting portion is spaced apart from the sensing element.