Vehicle lamp
AssigneeKoito Manufacturing Co., Ltd.
InventorHiroshi Shida
Life of this patent
Estimating the term…
Abstract
A vehicle lamp such that a bulb structurally integrating a bulb body with a plastic bulb socket is fixed and held in a bulb fitting hole in the rear top portion of a container-like metal reflector in a lamp chamber by a plastic socket fixture. In the vehicle lamp, the reflector is provided with convection-current forming holes and an air convention current generated between the inside and outside of the reflector promotes the heat radiating action of the reflector via the convection-current forming holes. Furthermore, a decrease in the light receiving area of the reflector to an extent equivalent to an area corresponding to the convection-current forming holes reduces heat deriving from direct and radiant heat transmitted to the reflector to that extent. Thus, the reflector is restrained from being heated to high temperatures.
Claims10
A vehicle lamp comprising:
- a cup-like metal reflector opening toward a front end of a lamp chamber, said reflector comprising a light source fitting hole formed in a rear portion thereof;
- a covering over the reflector opening toward the front end of the lamp chamber, comprising a light-transmitting portion;
- a fixing-holder member coupled to said light source fitting hole of said reflector;
- a light source body held in said fixing holding member and disposed in a predetermined position ahead of the rear portion of said reflector;
- and
- at least two convection-current forming holes formed on a surface of said reflector;
- wherein airflow into and out of said vehicle lamp is substantially through said convection-current forming holes, and
- wherein said convection-current forming holes respectively comprise a plurality of laterally-long slits formed at predetermined intervals in the direction of an optical axis extending in a direction substantially perpendicular to the optical axis of the reflector, and further comprises vertical wall-like heat-radiating fins extending along the respective slits and disposed between said adjoining slits.
Dependencies are inferred from the claim text.