Abstract: A joining device includes a male member having a shaft portion, and a tubular female member having a mating portion whereto the shaft portion is inserted and fitted, which are capable of detachably joined with each other. The shaft portion includes, on an outer surface thereof and along an axial line direction, a plurality of protruded portions about an axial line of the shaft portion in a cross section taken along an axial line direction and protruded over an entire perimeter. The mating portion includes, on an inner surface thereof and along an axial line direction, a plurality of recessed portions about an axial line of the mating portion in a cross section taken along an axial line direction and recessed over an entire perimeter. The shaft portion and the mating portion are joined by being engaged at the protruded portions and the recessed portions.

Abstract: A photovoltaic junction box includes a housing, a circuit board received in the housing, a plurality of metal brackets, and a plurality of bypass diodes. The plurality of metal brackets are secured to the circuit board, each of the plurality of metal brackets defines a receiving space receiving a spring sheet. The plurality of bypass diodes are respectively secured to the plurality of metal brackets and electrically connected to the circuit board. Each of a plurality of ribbons is clamped between the spring sheet and a corresponding metal bracket, and the ribbon directly and electrically contacts the corresponding metal bracket.

Abstract: A photovoltaic junction box includes a housing, a circuit board received in the housing, a plurality of metal brackets, and a plurality of bypass diodes. The plurality of metal brackets are secured to the circuit board. The plurality of bypass diodes are respectively secured to the plurality of metal brackets and electrically connected to the circuit board.

Abstract: A photovoltaic junction box includes a housing, a circuit board received in the housing, a plurality of metal brackets, and a plurality of bypass diodes. The plurality of metal brackets are secured to the circuit board, each of the plurality of metal brackets defines a receiving space receiving a spring sheet. The plurality of bypass diodes are respectively secured to the plurality of metal brackets and electrically connected to the circuit board. Each of a plurality of ribbons is clamped between the spring sheet and a corresponding metal bracket, and the ribbon directly and electrically contacts the corresponding metal bracket.

Abstract: A power device includes a substrate portion and a connector plug. The substrate portion defines a recess portion and a pair of receiving grooves, and includes at least one contact terminal. The connector plug includes a main body and a pair of conducting strips protruding outwardly from the main body. The main body defines at least one receiving slot. The pair of conducting strips are received in the receiving grooves correspondingly and the contact terminals slide into the corresponding receiving slots to accommodate the connector plug in the substrate portion. The main body and the recess portion are in a square shape respectively, so that the connector plug is capable of turning for 90 degrees relative to the substrate portion to be mounted on the substrate portion.

Abstract: A power device includes a substrate portion and a connector plug. The substrate portion defines a recess portion and a pair of receiving grooves, and includes at least one contact terminal. The connector plug includes a main body and a pair of conducting strips protruding outwardly from the main body. The main body defines at least one receiving slot. The pair of conducting strips are received in the receiving grooves correspondingly and the contact terminals slide into the corresponding receiving slots to accommodate the connector plug in the substrate portion. The main body and the recess portion are in a square shape respectively, so that the connector plug is capable of turning for 90 degrees relative to the substrate portion to be mounted on the substrate portion.