Patent ID: 7874597

Claim:
A mechanism for allowing a movable member which was moved forward to a predetermined position to automatically move further forward to a stopped position comprising: a first connecting member adapted to be provided in one of the movable member and an immovable member; and a second connecting member adapted to be provided in the other of the movable member and the immovable member, said second connecting member including a catcher for catching the first connecting member, said catcher having a retaining member for retaining and releasing the first connecting member and a lock member for holding the catcher in a waiting position, and an urging device for urging the catcher, said catcher being arranged to be able to move or relatively move along a moving direction of the movable member, and held in the waiting position by the lock member while receiving an urging force by the urging device toward a forward movement direction of the movable member so that when the movable member is moved to the predetermined position, the first connecting member is retained by the retaining member of the catcher; when the first connecting member is retained by the retaining member, the lock member releases the retaining member; upon releasing of the retaining member by the lock member, the movable member is automatically moved forward to the stopped position by the urging force of the urging device; and when the movable member which is in the stopped position is moved backward to the predetermined position, the retaining member of the catcher is held in the waiting position again by the lock member, and the first connecting member comes out of the catcher.