| 摘要 |
PROBLEM TO BE SOLVED: To provide a luminaire with high productivity and efficiency of the luminaire and excellent heat radiation. SOLUTION: A structure member 3 provided adjacent a heat generating member to interfere with heat radiation from the heat generating member is formed with a thermoplastic heat-resistant resin 10a and a resin compound containing a metal or an alloy with a low fusion temperature contained in the heat-resistant resin 10a together with metallic particles 20 and being capable of fusing when being plasticized. This enables to improve a coefficient of thermal conductivity of the resin itself, to radiate heat to the ceiling or the like without accumulating heat, to prevent a temperature rise of the luminaire and to suppress thermal deterioration of electronic parts. Because the resin substrate is used, it is possible to ingrate parts, to design complicated light distribution, to improve productivity and to reduce a cost. Because the resin substrate has a low infrared reflectivity, a lamp temperature does not rise and efficiency of the luminaire does not lower unlike the one using an aluminum substrate. Because the metal or alloy with a low fusion temperature being capable of fusing together with the metallic particles 20 when being plasticized is contained in the heat-resistant resin, a coefficient of thermal conductivity is enhanced. |
