<p>The device has a return spring (50) e.g. compression spring, exerting a retention force on a movable armature (6) in an open position. The spring is supported at the armature in such a manner that a direction of a collective force exerted on the armature depends on the position of the armature. A component of the collective force acting against a moving direction of a closing movement of the armature is maximum in the open position. Another return spring (8) has a spring axis (61) oriented parallel to a moving direction of the armature.</p>
