| 摘要 |
Fogging inside a lamp unit is suppressed by effectively using heat generated by a light source, even when the quantity of the heat generated by the light source is small. The lamp unit (10) is composed of a light source (14c), a reflecting plate, a lamp housing for storing the light source (14c) and the reflecting plate; and a lamp lens for covering an opening of the lamp housing. On the reflecting plate, a through hole (62h) is formed at a part positioned on the upper side of the first light source (14c) to be a heat source, and air warmed by heat generated by the first light source (14c) is guided to the rear side of the reflecting plate through the through hole (62h). The air which is guided to the rear side of the reflecting plate by the through hole (62h) and to ascend is guided by a first guide means (81) to an air staying section at the periphery of an enclosed space formed by the lamp housing and the lamp lens.
|
