Abstract: A wire take-up device includes a shell having an internal cavity. The internal cavity is correspondingly provided with a wire take-up mechanism and a power transmission mechanism; the power transmission mechanism includes a movable plate member and a stationary plate member; the movable plate member is rotatably in electrical contact with the stationary plate member; a connector on the stationary plate member has a conductive contact formed by correspondingly bending a metal sheet; the conductive contact is in the shape of a spring arch, and is correspondingly pressed against the movable plate member to establish an electrical connection; and the conductive contact is configured to be thickened correspondingly at least at its deformation bending.