Patent ID: 7591658
Filing Date: 2009-09-22
Classification: F21V,H01R

Abstract:
1. A decorative lighting system, comprising a pipe-shaped lamp holder, a light bulb preassembled with a lamp base, and two terminals arranged at an end of each of two wires, wherein the lamp base and the terminals are respectively inserted into the inside of the lamp holder from two different ends of the lamp holder, and two electrodes of the light bulb are respectively connected to the two terminals, characterized in that a bulge is arranged at the end of the lamp base facing to the terminals and the bulge is close to one of the two terminals; a torsion spring made with conductive material is arranged inside of the lamp holder; the torsion spring is provided with two feet corresponding to positions of the terminals, a first foot is in contact with one of the terminals, and a second foot is spaced apart from the other one of the terminals due to the pressure from the bulge on the lamp base; the two feet of the torsion spring are respectively contacted with their corresponding terminals by means of a torsion force from the torsion spring when the lamp base is removed from the lamp holder, the torsion spring has a pipe shape with wound steel wire, and has a hollow passage and an end plug is provided in the inside of the lamp holder and the end plug is arranged between the two terminals; a post is set at the end plug and the post is fitted into the hollow passage of the torsion spring.