| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vehicular lamp having a fixed structure capable of efficiently utilizing light emitted from an LED as a light source. <P>SOLUTION: In the vehicular lamp 1 wherein light source units 50 (60) having an LED 21 as a light source and an optical member (52 or the like) are mounted on a heat sink 10 and an LED module 20 for mounting the LED 21 on a power supply board 22 is pressed and fixed to a board mounting surface 13a of the heat sink 10 via an attachment 30, a plurality of positioning projections 14 coming in contact with an outer edge of the power supply board 22 are arranged on a circumference of the board mounting surface 13a, and recessed grooves 102 extending along an outer peripheral surface 14x of the projections 14 are arranged on a side of the root of the projections 14 facing the board mounting surface 13a. The outer peripheral surface 14x of the projections 14 and side faces 102a of the recessed grooves 102 are continued, the outer peripheral surface 14x of the projections 14 coming in contact with the outer edge of the power supply board 22 approximately crosses at right angle the board mounting surface 13a, and accurate positioning can be attained by making side edge angle sections 22a of the power supply board 22 surely come in contact with the outer peripheral surface 14x of the projections 14. Thus, heat transmission efficiency to the heat sink 10 becomes excellent by making a bottom face of the power supply board 22 surely come in contact with the board mounting surface 13a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
