| 摘要 |
PROBLEM TO BE SOLVED: To attain flexible luminous intensity distribution in the desired direction of the front side of a lighting fixture and improvements of performance and reliability of this kind of signal lighting fixtures by effectively using the inside of side walls conventionally useless areas for light distribution. SOLUTION: In this vehicle signal lighting fixture 1, a plurality of reflecting steps 4b for reflecting the light from a light source 5 are formed on the inside of side walls 2b and 2d of a lighting fixture housing 2. A free-form surface- reflecting mirror 4c coupling the plurality of reflecting steps 4b in a smooth curve is also formed. Thus, flexible light distribution in the desired direction of the front side of the lighting fixture 1 is attained by effectively using the inside of the side walls conventionally useless areas for light distribution. Further, it is agreeable compared with a conventional one when the lighting fixture 1 is watched through a lens during light-out. Rather, visual harmony is produced throughout the reflecting surface in the housing 2 to improve showings.
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