A device for contactless
current generation, in particular bicycle
dynamo, on a rotatable counter element, in particular wheel rim, with at least one movably mounted rotor element (2) having at least one
magnet (3), and at least one coil (7), in the at least one winding of which a current can be induced by the
magnet (3), which moves together with the rotor element (2), said current being
usable to operate a
consumer, wherein the rotor element (2) is movable by
magnetic interaction with the counter element (1), characterized in that the rotor element (2) and the counter element (1) have different axial profiles, and, in an operative position, the rotor element (2) is designed to generate at least one
magnetic field (6a, 6b) on the basis of an
eddy current in the conductive counter element (1), which forms an uninterrupted circular path, in such a manner that, by means of continuous relative movement between the counter element (2) and rotor element (1),
eddy current fields which are continuously opposed to one another and have oppositely polled magnetic fields (6a, 6b) to one another are induced in the counter element and the rotor element (2) is thus moved together with the counter element (1) with an
eddy current gearing being formed. Furthermore, the invention relates to a vehicle
lighting system and to a bicycle, each with a corresponding device for
current generation.