Power plug assembly

A power plug assembly comprising:

• a cable having two power wires;
• a lighting unit having a ring-shaped housing and a ring-shaped printed circuit board, each of the ring-shaped housing and the ring-shaped printed circuit board having a circular cross-section and a ring-shaped hole extending axially through a center thereof, the cable being inserted through the ring-shaped hole, and the lighting unit is positioned on the cable behind the two power wires, the ring-shaped printed circuit board is located in front of the ring-shaped housing, a plurality of light sources connected in parallel via wires are located in the ring-shaped housing and communicate with the ring-shaped hole, and the front end of the ring-shaped housing is provided with two power input terminals for being coupled with the ring-shaped printed circuit board, two guiding wires are extendedly provided on the front end of the ring-shaped printed circuit board;
• a conductive tube having an outer tube and an inner tube;
• an insulating material is provided between the outer tube and the inner tube, according to the polarity, the two power wires and the two guiding wires are respectively provided on the outer tube and the inner tube, then a welding operation is processed so as to fasten the two power wires and the two guiding wires on the conductive tube;
• an inner covering member made by an operation of plastic injection and served to cover the rear portion of the conductive tube, the front portion of the cable and the lighting unit, and the ring-shaped housing is exposed out of the inner covering member;
• and
• an outer covering member made by an operation of plastic injection and served to cover the inner covering member and the ring-shaped housing is exposed out of the outer covering member.