| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a straight-tube type lamp capable of restraining deflection of a cylindrical case due to change of a total length by thermal expansion, and capable of reducing manufacturing cost with a simple structure. <P>SOLUTION: The straight-tube type lamp is provided with a rod-like heat radiation member 20 for mounting an LED light source substrate 40, a cylindrical case 50 housing the heat radiation member 20 inside and equipped with a case end part 51 at either side in a length direction, a tea-caddy-lid-shaped cap part 60b on a ground side equipped with a disk part 63b and a side wall part 61b, fixed to the case end part 51b of the cylindrical case 50 so as to cover that 51b and with a surface of an inner side of the disk part 63b fixed to a member end surface 22b of the heat radiation member 20, and a tea-caddy-lid-shaped cap part 60a on a power-feeding side equipped with a disk part 63a and a side wall part 61a, with a surface of an inner side of the disk part 63a fixed to a member end surface 22a of the heat radiation member 20, and with a gap part 210 of a desired length formed between the case end part 51a and the surface of the inner side of the disk part 63a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
