Abstract: A decorative lamp structure which includes at least one set of light emitting elements, a power connector and a connecting wire. Each set of light emitting elements includes a plurality of light emitting elements spacedly connected in series on the connecting wire. Each light emitting element is connected to a bidirectional diode in parallel. When one or more of the light emitting element is faulty or damaged, the bidirectional diode of the faulty or damaged light emitting element is triggered and turned on so that the light emitting elements in the same set of light emitting elements are capable of working safely at a constant voltage. The connecting wire has two terminals connecting to the power connector respectively. In other words, when one or more light beads fails, the remaining light beads can still work under normal voltage and hence the Christmas decorative lamp structure can still operate safely.

Abstract: An artificial Christmas tree connection structure includes a branch connection base and branch shaft units, the branch connection base coupled at a tubular main trunk body, the branch shaft units being selectively adjusted the orientations thereof to hang at the branch connection base. The branch connection base, having a tubular configuration, has a plurality of first limitation indentions and a plurality of connection slots. The branch shaft unit has a metal shaft, wherein a connecting end portion of the shaft is bent to form a hook connector, wherein tree leaves are provided at the shaft. The hook connector passes through the first limitation indentions, the second limitation indentions, and the connection slots to hang the branch shaft unit at the branch connection base. The connection structure provides an ease of assembling, high production efficiency, low manufacturing cost, reliable connection, detaching prevention, and adjustment of the orientation of the branch.

Abstract: An artificial Christmas tree connection structure includes a branch connection base and branch shaft units, the branch connection base coupled at a tubular main trunk body, the branch shaft units being selectively adjusted the orientations thereof to hang at the branch connection base. The branch connection base, having a tubular configuration, has a plurality of first limitation indentions and a plurality of connection slots. The branch shaft unit has a metal shaft, wherein a connecting end portion of the shaft is bent to form a hook connector, wherein tree leaves are provided at the shaft. The hook connector passes through the first limitation indentions, the second limitation indentions, and the connection slots to hang the branch shaft unit at the branch connection base. The connection structure provides an ease of assembling, high production efficiency, low manufacturing cost, reliable connection, detaching prevention, and adjustment of the orientation of the branch.