Connecting structure of a series-parallel lighting string

摘要

An improved connecting structure of a series-parallel lighting string comprises a base having provided on the connecting end thereof three semicircular grooves, in which the in-between one sits on a lower position than the others, to receive three lead wires arranged in a triangular array so that a conventional structure constituted of a base and a top cap that accommodate only two wires can be adapted for more wires, significantly widening the scope of its applications.