Patent ID: 7387434

Claim:
A portable apparatus comprising: an apparatus enclosure body having a through hole; a pipe having an insert tube and a retainer tube, the pipe being fixed to the apparatus enclosure body with the insert tube inserted in the through hole and the retainer tube fixedly disposed outside the apparatus enclosure body; a push button having a shaft extending through the pipe, a detent that prevents the shaft from being pulled out of the pipe, and a manipulator head disposed outside the apparatus enclosure body; a biasing member that is sandwiched between the pushbutton and the pipe and biases the push button outward with respect to the apparatus enclosure body; a rotatable locking member having an inner wall with a stopper projection that comes into contact with and moves away from the manipulator head and an outer wall that fits on the outer surface of the retainer tube, the locking member being threadly attached to the retainer tube and being movable in the axial direction of the retainer tube between a locked state in which the stopper projection contacts the manipulator head and the locking member completely covers the peripheral side surface of the manipulator head, and an unlocked state in which the stopper projection is spaced from the manipulator head and the peripheral side surface of the manipulator head projects outwardly beyond the locking member; and a whirl-stop that is sandwiched between the inner or outer wall and the retainer tube and provides rotational resistance to the locking member.