Patent ID: 8678608

Claim:
A lamp device comprising: a power unit including a battery housing adapted for receiving a battery set therein, and a circuit board disposed fixedly in said battery housing and adapted to be connected electrically to the battery set received in said battery housing; a lamp casing enclosing said power unit, and connected movably to said battery housing such that said lamp casing is movable relative to said battery housing in an axial direction; an LED lighting unit mounted in and connected fixedly to said lamp casing, and disposed spacedly above said circuit board of said power unit; and a power switch mounted on said circuit board and connected electrically between said LED lighting unit and the battery set received in said battery housing, said power switch being operable between a power-on state, where said LED lighting unit is connected electrically to the battery set via said power switch such that said LED lighting unit emits light in response to supply of electric power from the battery set, and a power-off state, where said LED lighting unit is disconnected electrically from the battery set received in said battery housing; wherein, when said lamp casing is pressed to move said LED lighting unit toward said circuit board, said power switch is actuated in response to movement of said LED lighting unit toward said circuit board to switch from a current one of the power-on and power-off states to the other one of the power-on and power-off states.