Lamp unit

Abstract

Disclosed is a lamp unit 10 which comprises a hat-shaped reflector 2 having an inner surface formed as a reflective surface for reflecting light, a plurality of bar-shaped light source lamps 1 each of which has an anchor end fixed to a vicinity of an end wall 2a of the reflector 2, and an insertion portion inserted inside the reflector 2 to protrude toward an opening of the reflector 2, and a reflection member 3 having an outer surface formed as a reflective surface. The reflection member 3 is disposed in a central region of the end wall 2a of the reflector 2 in such a manner to protrude toward the opening of the reflector 2. In the lamp unit, a protrusion length “d1” of the reflection member 3 is set in the range of one-third to three-fourths of a protrusion length “d2” of the insertion portion of each of the bar-shaped light source lamps 1. The present invention can optimize a positional relationship between the reflection member and each of the bar-shaped light source lamps so as to obtain enhanced illumination efficiency.

Dependencies are inferred from the claim text.