| CPC F21S 41/24 (2018.01) [F21S 41/148 (2018.01); F21S 41/32 (2018.01)] | 7 Claims |
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1. A lighting tool for a vehicle comprising:
a light source;
a light guide part configured to guide light emitted from the light source from a first end located on one end side to a second end located on the other end side;
an incidence part configured to cause the light emitted from the light source to enter inside of the light guide part from the first end of the light guide part; and
a reflecting part configured to reflect light guided toward the second end of the light guide part in one direction substantially perpendicular to an optical axis of the light emitted from the light source,
wherein the light guide part has a width that gradually increases from the first end toward the second end and a shape in which both sides of the light guide part in a widthwise direction having the optical axis interposed between are curved toward the one direction,
the incidence part has an incidence surface located in a central part of the first end of the light guide part and facing the light source,
the incidence surface has a shape in which both sides of the incidence surface in the widthwise direction having the optical axis interposed between are curved toward the one direction, curved in a concave shape when the light guide part is seen from the one direction, and curved in a convex shape in a cross section in a thickness direction of the light guide part parallel to the optical axis,
the reflecting part has a reflecting surface inclined toward the one direction on the second end of the light guide part, and
the reflecting surface has a shape in which both sides of the reflecting surface in the widthwise direction having the optical axis interposed between are curved toward the one direction.
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