| 摘要 |
<p>The drive device for a locking mechanism of a motor vehicle door lock which can be fastened by means of a central locking installation comprises an operating element which is guided on a housing for linear displacement between a fastening position and an unfastening position and is coupled with the fastening mechanism. A motor drives the operating element in both directions of displacement. A locking lever mounted on the housing for pivoting about a spindle extending transversely of the direction of displacement of the operating element in its locking position blocks the operating element when it is situated in the fastening position. Thus the fastening mechanism in the locked condition cannot be unfastened manually. The locking lever is pivoted by a rotating drive through an eccentric. The eccentric engages in an aperture of the locking lever. The aperture permits a pivoting movement of the eccentric of more than 180 DEG , while a stop face of the aperture limits the range of rotation of the eccentric. The end positions of the eccentric are situated, both in the locking position and in the unlocking position of the locking lever in a "beyond-dead-point-position", so that the locking device holds the locking lever in self-locking manner.</p> |
