Lamp structure of lamp string

A lamp adapted to be connected to a lamp string by means of wires, the lamp comprising:

• a bulb having conductive terminals;
• a retainer comprising a cylinder having a top opening for receiving the bulb and a U-shaped support having a bottom with two arms extended towards and connected to a lower side of the cylinder for supporting and retaining the bulb in the retainer, opposite openings being formed between the two arms of the support and the cylinder and on opposite sides of the support, holes being defined in the bottom of the support for extension of the terminals of the bulb, projections extending from opposite sides of the support and extending in opposite directions, a partition extending from the bottom of the support and having opposite side faces that are inclined and converge to each other;
• a socket comprising a circumferential wall forming an upper space having an upper opening for receiving the retainer therein and a lower space having a lower opening for extension of the wire, a securing structure formed on an inside surface of the circumferential wall and corresponding to each of the openings between the two arms of the support and the cylinder of the retainer, each securing structure comprising two spaced axially extending ribs received in an opening between the two arms and engaging corresponding arms of the support of the retainer, a circumferentially extending rib being formed on the inside surface for engaging the projection of the retainer to secure the retainer in the socket, channels being defined in the circumferential wall in the lower space for receivingly engaging the side faces of the partition of the retainer;
• and
• a conductive pad mounted to each wire and located in a chamber formed between the securing structures and the circumferential wall of the socket for engaging the terminals of the bulb.