Patent ID: 8905771

Claim:
A structure of tree-shaped lighting decoration, comprising: an extension cable assembly, which is a modularized assembly adapted to carry a regular voltage supplied from an electric main and comprises an extension cable, a cylindrical socket, and a cylindrical plug, the extension cable having an end electrically connected with the cylindrical socket and an opposite end electrically connected with the cylindrical plug, the cylindrical plug having a distal end on which an insertion tip is formed, the cylindrical socket having a distal end in which an insertion hole is formed, the insertion tip and the insertion hole being each axially symmetric; a tree-segment tube, which has an end section forming a retention tubular section, the retention tubular section receiving the cylindrical socket therein and having a reduced portion that retains the cylindrical socket in position; and an ancillary component, which comprises a conical body that is reduced in a direction extending into the tree-segment tube, the ancillary component comprising a stepped bore formed axially therethrough delimited by a circumferential wall, the circumferential wall of the stepped bore comprising a side opening, the stepped bore of the ancillary component having an inside surface forming a dimple, the cylindrical plug having a circumferential surface forming a bump engageable with the dimple, whereby the ancillary component receives the extension cable into the stepped bore through the side opening so that the dimple of the ancillary component engages the bump of the cylindrical plug, the conical body of the ancillary component being then positionable and fixed in an end section of the tree-segment tube that is opposite to the retention tubular section to thereby form a three segment.