<p>The device has an axial locking insert (2) supported movable in a housing (1) and in effective connection with a switch guide plate. The locking insert is designed as a hollow body into which a spring-loaded pressure unit (3) is inserted. The pressure unit directly or indirectly provides an enlargement of the locking insert in radial direction in a subrange of the locking insert. The locking insert or the subrange of the locking insert lies at an inner wall of the housing in a clearance free manner.</p>
