| 摘要 |
PROBLEM TO BE SOLVED: To provide a marker light, in which an LED can be efficiently cooled, by aligning plural LEDs in the peripheral edge of plural plate-like boards, of which flat surface is positioned in the emitting direction of a lamp body. SOLUTION: Plural LEDs 12 are aligned for arrangement in front of a peripheral edge of a plate-like board 13, of which flat surface is positioned in the emitting direction of a marker light. A nearly bell-shaped groove 25 is arranged in the periphery of the LEDs 12, and the hot air inside the groove 25 is heat- exchanged with the air inside 17d of a pipe-like support 17, which forms a second cooling means 33b, through a support 17, and cooled and fallen inside the groove 25 so as to cool the inside of the groove 25. The heated air inside the support 17 is discharged through a hole 29 provided with a bottom and a small hole 31, which respectively form a second cooling means 33b. New outside air is sucked for leading from a lower ventilation hole 20 into the support 17, and the outside air is made to flow as a cooling material. The LEDs 12 inside the groove 25 are cooled, and lowering of luminance of the LEDs 12 is prevented. |
