Patent ID: 7270468

Claim:
A lamp string comprising: a plurality of bulb mounting units arranged electrically in series with each other; and a plurality of light-emitting units mounted respectively on said bulb mounting units, each of said light-emitting units being provided with a pair of conductive leads; wherein each of said bulb mounting units includes a receptacle defining an inner space, having a top open end, and formed with angularly displaced first and second inner shoulders in said inner space, each of said first and second inner shoulders having a depth from said top open end of said receptacle, the depth of said first inner shoulder being shorter than that of said second inner shoulder, spaced apart first and second conductive contacts mounted in said receptacle and disposed below said first and second inner shoulders, and a mounting seat mounted in said receptacle and including a tubular part with a bottom end, and a flange extending radially and outwardly from a peripheral edge of said bottom end of said tubular part and formed with an axially extending protrusion, said flange having a contact portion seated on said first inner shoulder, said axially extending protrusion being seated on said second inner shoulder; and wherein each of said light-emitting units is mounted in said tubular part of said mounting seat of the respective one of said bulb mounting units, said leads of each of said light-emitting units extending through said bottom end of said tubular part of said mounting seat of the respective one of said bulb mounting units and connected electrically and respectively to said first and second conductive contacts.