Patent ID: 8240435

Claim:
Drive mechanism for a device with two operating parts, which are connected so as to be pivotally displaceable relative to each other between a first position and a second position over a certain pivotal angle (α) about a common axis of rotation, wherein driving means are provided in such a manner that, proceeding from the first position, a movement in the direction of the second position can be initiated initially in a manual manner by means of a slight movement and the additional movement is then effected automatically through spring force (F) until the second position has been reached, wherein the movement out of the first position into the second position is possible in an arbitrary direction of movement, clockwise or counterclockwise, said driving means comprising a driven part that is associated with the one operating part and two drives that are associated with the other operating part and are in the form of the same kind of force storing means, said force storing means interacting with the driven part in a symmetrical disposition in opposing directions such that for each of the two opposing movements only the one force storing means, moving out of a starting position that is biased with a spring force (F), is in driving connection with the driven part by means of positive locking elements, whilst the respective other force storing means is retained in its starting position that is biased with the spring force (F).