Patent ID: 8360788

Claim:
A freely rotatable electrical conduction structure, comprising: at least two cylindrical electrical conduction portions arranged separately along an axis, wherein an inner surface of each cylindrical electrical conduction portion is welded with an end of a conducting wire; an insulated material portion combined with the at least two cylindrical electrical conduction portions via injection molding to form a circular shaft assembly; and at least two electrical conduction terminals corresponding to the at least two cylindrical electrical conduction portions respectively, and each electrical conduction terminal partially projecting to form an arc contact portion configured to abut onto an outer peripheral surface of the corresponding cylindrical electrical conduction portion of the electrical conduction terminal, the each electrical conduction terminal being allowed to rotate around the corresponding cylindrical electrical conduction portion of the electrical conduction terminal with the arc contact portion keeping contacting and conducting with the outer peripheral surface; wherein the insulated material portion further comprises an anti-rotation portion engaged to a hexangular recess structure of a box to prevent the rotation of the circular shaft assembly.