Lamp unit
AssigneeToyota Shatai Kabushiki Kaisha
InventorsYouji Mikami, Daisuke Nagafuchi, Koji Sato
Life of this patent
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Abstract
A lamp unit is constructed of light sources, a reflector, a lamp housing that receives the light sources and the reflector therein, and a lamp lens that closes an opening of the lamp housing. The reflector has a through hole that is formed in a portion positioned above a first light source as a heat source, so that air warmed by heat of the first light source can be introduced into a rear side of the reflector via the through hole. The air introduced into the rear side of the reflector via the through hole and ascending therein can be lead by a first guide means to an air stagnating portion positioned in an end periphery of a hermetically-closed space that is defined by the lamp housing and the lamp lens.
Claims4
A lamp unit constructed of light sources, a reflector that is capable of surrounding the light source and reflecting light emitted from the light source forwardly, a lamp housing that receives the light sources and the reflector therein, and a lamp lens that closes an opening of the lamp housing,
- wherein the reflector has a through hole that is formed in a portion positioned above a first light source as a heat source, so that air warmed by heat of the first light source can be introduced into a rear side of the reflector via the through hole,
- wherein the air introduced into the rear side of the reflector via the through hole and ascending therein can be led by a first guide means to an air stagnating portion positioned in an end periphery of a hermetically-closed space that is defined by the lamp housing and the lamp lens,
- wherein a support member supporting additional light sources is disposed in the rear side of the reflector so as to be positioned above the through hole, so that the air ascending in the hermetically-closed space can be separated into right and left by the support member and a second guide means formed in the support member,
- wherein the support member includes a plurality of upwardly extending plate portions, the plate portions being transverse to one another, and
- wherein the second guide means is positioned at an upper end of one of the plurality of plate portions of the support member, extending upwardly and away from the support member.
A lamp unit constructed of light sources, a reflector that is capable of surrounding the light source and reflecting light emitted from the light source forwardly, a lamp housing that receives the light sources and the reflector therein, and a lamp lens that closes an opening of the lamp housing,
- wherein the reflector has a through hole that is formed in a portion positioned above a first light source as a heat source, so that air warmed by heat of the first light source can be introduced into a rear side of the reflector via the through hole,
- wherein the air introduced into the rear side of the reflector via the through hole and ascending therein can be led by a first guide plate to an air stagnating portion positioned in an end periphery of a hermetically-closed space that is defined by the lamp housing and the lamp lens, and
- wherein a support member supporting additional light sources is disposed in the rear side of the reflector so as to be positioned above the through hole, so that the air ascending in the hermetically-closed space can be separated into right and left by the support member and a second guide plate positioned at an upper end of the support member,
- wherein the support member includes a plurality of upwardly extending plate portions, the plate portions being transverse to one another.
Dependencies are inferred from the claim text.