Patent ID: 7028573
Filing Date: 2006-04-18
Classification: E05F,E05Y,Y10T

Abstract:
1. An opening and closing device for moving a movable member comprising: a drive gear connected to a power source; a driven gear geared with the drive gear; an immovable portion supporting the drive gear and the driven gear; a dynamic transmission mechanism, connected to the driven gear so that the driven gear and the dynamic transmission mechanism rotate together as a unit, the dynamic transmission mechanism transmitting a drive force of the power source from the driven gear to the movable member; and a shock absorbing member for applying a force to the movable member in accordance with a state of the movable member; wherein a direction of a rotational force affecting the driven gear via the dynamic transmission mechanism in accordance with a resultant force from a weight of the movable member and the shock absorbing member fluctuates; a friction member applied at least at one position between relatively movable facing surfaces of the immovable portion, the drive gear, the driven gear, and the dynamic power transmission mechanism.