CPC F21S 41/19 (2018.01) [F21S 41/143 (2018.01); F21S 41/153 (2018.01)] | 6 Claims |
1. A vehicle-mounted light source unit comprising:
a holding member that includes a pair of ribs; and
a substrate that is disposed on the holding member, includes a pair of fitting portions into which the respective ribs are fitted, and on which a light source is mounted,
wherein
when viewed along a height direction of each of the ribs, each of the ribs includes:
an extending portion that extends in a direction different from a direction in which the pair of ribs is arranged, and has both end surfaces having a planar shape, and
a protruding portion that protrudes from a part of the extending portion to a side on which the pair of ribs approach each other or are away from each other in a direction different from an extending direction of the extending portion, and has an end surface having a planar shape having an in-plane direction different from an in-plane direction of both end surfaces of the extending portion, and
each of the fitting portions includes:
a pair of first facing portions facing both end surfaces of the extending portion, and
a second facing portion facing the end surface of the protruding portion.
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