Sensor apparatus having an adjustment device

A sensor apparatus for a towing vehicle coupling or as a component of a towing vehicle coupling, by means of which a trailer vehicle, can be coupled to a towing vehicle wherein the towing vehicle coupling has a coupling element for the releasable coupling of a mating coupling element, which elements are or can be fastened to the towing vehicle and to the trailer vehicle and, in the mutually coupled state, forming a coupling joint, can be rotated about a coupling joint rotational axis relative to one another, wherein the sensor apparatus has a driver which is mounted on a driver mounting device so as to be rotatable about a drive rotational axis relative to the coupling element and which can be rotationally driven about the drive rotational axis by the mating coupling element upon rotation about the at least one coupling joint rotational axis in order to detect a rotation of the mating coupling element about the at least one coupling joint rotational axis relative to the coupling element, and wherein the sensor apparatus has a sensor for detecting a particular rotational position of the driver relative to the driver mounting device with respect to the drive rotational axis, and wherein the sensor apparatus has a retaining device for retaining the driver mounting device with respect to the coupling element so as to be non-rotatable with respect to the drive rotational axis, and wherein the sensor apparatus further comprises an adjustment device with at least one adjustment element for moving and/or guiding the driver between a working position set closer to the mating coupling element and provided for rotationally driving the driver and an idle position farther away from the mating coupling element, and wherein the adjustment device is not in engagement with the retaining device in the working position, so that the retaining device can be moved relative to the coupling element with at least one degree of freedom of movement which is different from the rotatability about the drive rotational axis and is suitable for providing or maintaining the drive coupling of the driver with the mating coupling element.