String light connector and the applications thereof

A string light connector, comprising:

• a cable;
• a plug connected with one end of the cable;
• and
• a socket module connected with the other end of the cable, the socket module having a plurality of interface modules of which at least one is used for electrically connecting an external lighting module and at least one is used for electrically connecting a plug of another string light connector, wherein both the lighting module and the corresponding interface module are further worn by a locking ring therearound to be locked together, and both the plug of the another string light connector and the corresponding interface module are further worn by another locking ring therearound to be locked together,
• wherein the socket module has an insulating body of which side edges are provided with a plurality of pedestals corresponding to the interface modules with each pedestal defining a plurality of inserting holes, a plurality of socket terminals are arranged in the insulating body with each socket terminal having a connecting tail for being electrically connected with the cable and a plurality of contact tails respectively inserted in the corresponding inserting hole of each of the pedestals, and each of the socket terminals is further fastened in the insulating body by means of pressing a pressing plate thereon.