Patent ID: 7909281
Filing Date: 2011-03-22
Classification: B65H,H01R,H02G

Abstract:
1. A wire-winding device having a circuit unit, comprising: an insulating body having a receiving space, the insulating body having a moving slot and a groove adjacent to the moving slot formed in an inner wall thereof; a wire-winding disk rotatably located in the receiving space, wherein the wire-winding disk has a first receiving cavity on one side thereof, a second receiving cavity centrally disposed on an opposing side of the wire-winding disk and at least one first concave slot disposed adjacent and external to the second receiving cavity; at least one first rolling ball disposed at least partially within the first concave slot and contacting the insulating body; two cables wound around the wire-winding disk; a scroll spring located in the first receiving cavity, wherein the scroll spring is connected between the wire-winding disk and the insulating body; a circuit unit located in the second receiving cavity, wherein the circuit unit is electrically connected with the cables for converting an input voltage to a certain output voltage; a rotatable disk body disposed below the scroll spring, the disk body having a track slot disposed in correspondence with the moving slot and two second concave slots respectively disposed in correspondence with the groove formed in the insulating body; a second rolling ball received between the track slot and the moving slot; and two rolling balls respectively received between the two second concave slots and the groove formed in the insulating body.