Patent ID: 7604373

Claim:
A holding frame for fixing a plurality of lamp pairs having electrode holders and lamps wires, the holding frame comprising: a top surface, a bottom surface, an outer surface, and an inner surface; a plurality of electrode receiving openings defined at the top surface; a plurality of wiring openings defined at the bottom surface; a plurality of electrode groove pairs defined at the outer surface, each electrode groove of each of the electrode groove pairs communicating between a respective one of the wiring openings and a respective one of the electrode receiving openings, the electrode groove pairs configured for receiving the electrode holders of the lamp pairs, wherein each of the electrode grooves is partly bounded by a pair of railings formed at the outer surface, and a width between the railings is less than a corresponding width of the electrode receiving opening at the electrode groove; a plurality of wiring channels defined at the bottom surface, each wiring channel communicating between the wiring openings at a corresponding electrode groove pair, the wiring channels configured for receiving selected portions of the lamp wires; a plurality of wiring outlet pairs defined at the bottom surface, and each wiring outlet of each of the wiring outlet pairs communicating between a respective wiring channel and the inner surface; a depressed area parallel to the inner surface, and a plate mounting surface located at the depressed area, wherein the plate mounting surface is parallel to the inner surface, and parallel to the outer surface but at a side of the holding frame opposite to the side where the outer surface is; and a plurality of mounting structures extending generally between the plate mounting surface and the inner surface, wherein each of the mounting structures comprises a first protrusion and a second protrusion, the first and second protrusions are located generally at respective opposite sides of a corresponding one of the electrode grooves, and are oriented symmetrically opposite each other, and bottom surfaces of the first and second protrusions are convex.