Heat radiation fins, heat sinks and lighting equipment

摘要

PROBLEM TO BE SOLVED: To provide a radiation fin suitable for a heat sink.SOLUTION: A radiation fin 122 has a mounting portion 126 fixed to a base plate, and a radiation plate 125 continued from the mounting portion, and the radiation plate 125 has a cut portion (inner cut portion 84, outer cut portion 85) forming a space with the base plate. The cut portion (inner cut portion 84, outer cut portion 85) is a cutout part cut into the L-shape at an end portion at a lower side on which the mounting portion 126 is disposed. The mounting portion 126 is formed by one side of a sheet of sheet metal bent at a folding line, the radiation plate 125 is formed by the other side of the bent sheet metal, and the cut portion (inner cut portion 84 outer cut portion 85) exists on at least one end portion of the folding line.SELECTED DRAWING: Figure 17