| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an illumination not affected by thermal expansion. <P>SOLUTION: The illumination lamp 50 includes a cylindrical glass tube 6 and a light-emitting part 54 housed in the glass tube 6. The light-emitting part 54 includes LEDs 1, a substrate 2, and a heat sink 4. A base 5 is set in extension over a length direction of the glass tube 6 and is fixed to either end of the heat sink 4 (an elastic structure) with a linear expansion coefficient larger than that of the glass tube 6. The base 5 is either not fixed to the glass tube 6 or fitted in free movement to the glass tube 6 with silicone 9 within an elasticity range of the heat sink 4 (the elastic structure). The base 5 is fixed to a structure with the largest linear expansion coefficient among those over nearly a whole width of the lamp, and moreover, it is either not fixed to structures over a whole width other than the one with the largest linear expansion coefficient, or loosely fixed to them. <P>COPYRIGHT: (C)2013,JPO&INPIT |
