Patent ID: 8079446

Claim:
An operational mechanism for a movable body, comprising: a movable body, rotatably attached to a support, and rotatable to an engaged position, a closed position and an open position; a rotating member, rotatably attached to the support, which rotates due to movement of the movable body to the engaged position; a biasing member, one end of which is attached to the movable body, and the other end of which is attached to the rotating member; and an operation member, which rotates the rotating member, changes a biasing position of the biasing member with respect to a center of rotation of the movable body, and generates in the biasing member a rotational force that moves the movable body to the closed position or the open position, wherein the biasing member stores the rotational force to move the movable body toward the open position in the event that the movable body is in the engaged position, and the biasing member stores the rotational force to move the movable body toward the closed position in the event that the movable body is in the open position.