| 摘要 |
<p>The invention relates to a drive device for a motor vehicle door lock or the like, which comprises a motor or in particular an electromotor drive and a gear unit (3) with a drive end and an output end. In order to optimize mechanical back-up actuation in the case of power failure or voltage drop or other interruption of the motor, in particular electromotor drive, according to the invention, between the drive end and the output end of the gear unit (3), is fitted a coupling (10) that is variable in coupling degree, which has a high degree of coupling in the case of high rotational speed, and a low degree of coupling in the case of low rotational speed.</p> |
