Abstract: A bulb set structure comprises a plug having two guiding pieces to connect with a power source and to assemble with a LED bulb set and a fitter, an orifice to output alternating current, and a power converting unit having one end to electrically connect with the guiding pieces, and having another end to connect with wires of the LED bulb set and the fitter by using the joining segment to convert the alternating current into direct current, and a circuit board is used to rectify the alternating current to output direct current to emit LED bulb set and to transmit the alternating current to the fitter.

Abstract: A waterproof electric plug with transformer includes a housing comprising an internal space, two forward prongs, a rear waterproof element, and a rear fastening assembly; a transformer unit disposed in the space and electrically connected to the prongs; a rear cap comprising a connector electrically connected to the transformer unit, and a corresponding fastening assembly; and a waterproof member disposed in the waterproof element. The housing is adapted to repel water when the cap is secured thereto by matingly fastening the corresponding fastening assembly and the fastening assembly together with the waterproof member being clamped in the waterproof element.

Abstract: A socket, plug, and adaptor combination includes a housing having a forward sliding door; an inverted L-shaped circuit assembly in the housing having a conductor mounting section in the vertical part; a transformer being concealed in the horizontal part of the circuit assembly in a waterproof way and adapted to electrically connect to a power cord; two electrical connection assemblies each disposed in the conductor mounting section and having a prong; a conductive assembly comprising two separate fuses disposed in the conductor mounting section, each fuse being electrically interconnected between the prong and the transformer; a cover releasably secured onto the circuit assembly and having two sockets distal the prongs; and a covering plate disposed between the transformer and the cover. The combination is applicable to be used as a charger for outdoor LED type Christmas light strings.

Abstract: Waterproof electric plug or receptacle for LED light string is provided. In one embodiment, the plug includes a housing comprising two prongs, two fuses, an internal space, rear passages, compartments between the space and the passages, a wall for separating the space and the compartments; an electrical assembly comprising a PCB electrically to the prongs via the fuses, and rear conductive posts in the compartments; a power cord passing the passages and having two sleeves secured to the posts, and a shell mounted around the housing. Waterproof adhesive is applied on the wall, the compartments, and front and rear ends of the PCB.