Drive device for wipers of vehicles

Drive devices for wipers are known, in which a motor drives a crank which bears a crank pin on which an eccentric with a pinion is rotatably mounted. The pinion can be driven via a gearwheel mounted on the crank. In this manner, the eccentric can be adjusted in order to lay the wipers down into a lowered parking position. In order to achieve this aim with a simple construction, in a drive device according to the invention the crank can be driven by the motor in opposed directions of rotation. In addition, after a reversal of the direction of rotation of the crank the gearwheel can be swivelled via a guide lug and a fixed guide, in which the guide lug engages, either in one direction or the other around its bearing spindle.