Patent ID: 7494247

Claim:
A HID searchlight module comprising: a lamp head unit, said lamp head unit comprising a lamp case, a lamp base mounted in said lamp case, a reflector fastened to a front side of said lamp base, a HID lamp installed in said lamp base within said reflector, a PC board disposed at a rear side of said lamp base, said PC board having a positive contact at the center thereof and a negative contact at one side thereof, an lamp head end cap provided at a rear side of said PC board, said lamp head end cap comprising two holes corresponding to the positive and negative contacts of said PC board, two metal springs respectively mounted in the holes and respectively electrically connected to the contacts of said PC board, two metal conducting pins respectively supported on said metal springs, a front inner annular flange protruded from a front side thereof at the center, a front outer annular flange protruded from the front side at the center and concentrically spaced around said front inner annular flange, and an annular coupling groove defined between the front outer annular flange and the front inner annular flange; a ballast unit connectable to said lamp case in a line, said ballast unit comprising a ballast housing, a ballast mounted in said ballast housing for boosting voltage, a power switch mounted in said ballast housing at one side for operation by the user holding the HID searchlight module to switch on/off power supply, and a ballast unit end plate at a front side of said ballast housing for the connection of said lamp head end cap of said lamp head unit, said ballast unit end plate comprising a circular center groove, which receives the front inner annular flange of said lamp head end cap, an annular groove concentrically disposed around said circular center groove, which receives the front outer annular flange of said lamp head end cap, an annular flange disposed between the annular groove and the circular center groove, an annular contact plate mounted in the annular groove, which is kept in contact with one metal conducting pin of said lamp head end cap, and a metal contact mounted in the circular center groove, which is kept in contact with the other metal conducting pin of said lamp head end cap, said ballast having positive and negative terminals thereof respectively and electrically connected to the metal contact and annular contact plate in said ballast unit end plate; and a battery unit connected to one end of said ballast unit opposite to said lamp head unit, said battery unit comprising a battery housing, a battery mounted in said battery housing.