Patent ID: 8497443

Claim:
A switch actuation device for turning on and off a switch in accordance with one of movement and rotation of at least two movable members, said switch actuation device comprising: a first shaft; a supporting member swingably or rotatably disposed around the first shaft in response to movement or rotation of a first one of the at least two movable members; a second shaft supported by the supporting member; and a swingable lever supported by the second shaft with its both ends being swingable, one of said both ends including a switch actuation section to activate the switch, said swingable lever swinging around the second shaft in response to movement or rotation of a second one of the at least two movable members, wherein said switch actuation section of the swingable lever activates the switch when the supporting member and the swingable lever swing at the same time and in opposite direction in response to the movement or the rotation of the first and second one of the at least two movable members, respectively, and wherein said switch actuation section of the swingable lever includes a cam.