Safety coupling for fin ray wiper

Disclosed is a windscreen wiper device for a vehicle, in particular a motor vehicle, comprising a fastening element fastened to a drive shaft. The windscreen wiper device comprises a wiper blade having an elongated upper part which is designed at least partially flexibly, an elongated lower part which is designed at least partially flexibly, and a plurality of connecting elements for connecting the upper part and the lower part, wherein the connecting elements are spaced apart from each other along a longitudinal extension of the wiper blade, and wherein the connecting elements are configured to enable a movement of the upper part and lower part relative to each other with a movement component along a longitudinal extension of the wiper blade. The windscreen wiper device further comprises a fastening part on the wiper blade side, wherein the fastening part on the wiper blade side can be connected to the fastening element in a detachable manner, and a coupling device, wherein the fastening part on the wiper blade side and the fastening element can be connected for conjoint rotation via the coupling device until a defined torque value is exceeded.