Motorised window drive with electronic anti-jamming protection e.g. for motor vehicles

摘要

The drive has at least one spring in the drive system between the drive unit and the window pane. The spring is tensioned in a housing by a force which corresp. to at least the anticipated drive force when the window pane is raised. The spring is joined to a force transfer element. The spring's maximum blocking force (FB,F'B) is the sum of the anticipated drive force and the permissible clamping force. The spring characteristic has a diminishing, pref. negative shape when the bias force (FV) is exceeded so that the spring allows a relatively large drive unit displacement (delta1,delta1') when the bias force is exceeded.