Patent ID: 8069694

Claim:
A key device comprising: a rotating member having a regulating surface that is rotated by rotation of a key; an allowing member that is rotated by the rotating member when the rotating member is rotated to a predetermined rotational position; a regulating member provided to correspond to the allowing member, that regulates rotation of the rotating member to the predetermined rotational position by not rotating together with the allowing member when the rotating member is rotated to the predetermined rotational position, and that allows rotation of the rotating member to the predetermined rotational position by rotating together with the allowing member when the rotating member is rotated to the predetermined rotational position, said regulating member having a distal end that includes an end surface that selectively engages said regulating surface of said rotating member; and a pair of restricting portions included in the allowing member and disposed at both sides of the regulating member in a rotating axis direction of the regulating member that restrict tilt of the regulating member to said both sides in the rotating axis direction wherein the restricting portions are provided to face each other such that the distal end of the regulating member is sandwiched between the restricting portions, wherein one end portion of the allowing member that contacts the rotating member is disposed on both sides of the regulating member in the rotating axis direction such that the pair of restricting portions of the allowing member are disposed on both sides of the distal end of the regulating member in the rotating axis direction, and the other end portion of the allowing member which is rotatably supported on a rotating axis of the regulating member is disposed on only one side of the regulating member in the rotating axis direction.