Lens structure for vehicle lighting fixtures

Abstract

To improve design flexibility about a cross-sectional shape of an area of light led by a lens structure while efficiently using a space in the lens structure.SOLUTION: A vehicular lamp body lens structure leads at least a part of light Li in a Z+ direction to both sides in an X direction, and then leads the part of light in a Y+ direction. A first reflection surface 31 totally reflects the light in the Z+ direction in an X- direction. A second reflection surface 32 totally reflects the light Li in the Z+ direction in an X+ direction. The first reflection surface 31 is equipped with a first reflection surface main part 31a, and a first reflection surface sub part 31b projecting out from the first reflection main part 31a in the X+ direction. The second reflection surface 32 is equipped with a second reflection surface main part 32a, and a second reflection surface sub part 32b projecting out from the second reflection surface main part 32a in the X- direction. The first reflection surface sub part 31b and the second reflection sub part 32b are arranged in parallel with each other in a Y direction in a plan view in a Z direction, and intersect each other in the plan view in the Y direction.SELECTED DRAWING: Figure 7

Claims

1. A lens structure for a vehicle light unit that guides at least a portion of the light in the Z+ direction, which is one of the predetermined Z directions, in the X- and X+ directions, which are both sides of the X direction perpendicular to the Z direction, and then guides it in the Y+ direction, which is one of the Y directions perpendicular to the Z direction and the X direction, A first reflective surface whose orientation perpendicular to the surface is inclined with respect to the Z direction, and which totally reflects light in the Z+ direction in the X- direction, A second reflective surface whose orientation perpendicular to the surface is inclined with respect to the Z direction, and which totally reflects light in the Z+ direction in the X+ direction, Equipped with, The first reflective surface comprises a first reflective surface main portion and a first reflective surface sub portion that protrudes from the first reflective surface main portion in the X+ direction and is shorter in the Y direction than the first reflective surface main portion. The second reflective surface comprises a second reflective surface main portion provided at a position spaced apart from the first reflective surface main portion in the X+ direction, and a second reflective surface sub portion protruding from the second reflective surface main portion in the X- direction and being shorter in the Y direction than the second reflective surface main portion. The first reflective surface sub-part and the second reflective surface sub-part are arranged side by side in the Y direction in a plan view as seen in the Z direction, and intersect in a plan view as seen in the Y direction. Lens structure for vehicle lighting fixtures.

2. A third reflective surface is provided on the X-direction side of the first reflective surface, its orientation perpendicular to the surface is inclined with respect to the X direction, and it totally reflects light from the first reflective surface in the Y+ direction. A fourth reflective surface is provided on the X+ side of the second reflective surface, its orientation perpendicular to the surface is inclined with respect to the X direction, and it totally reflects light from the second reflective surface in the Y+ direction. A lens structure for a vehicle light fixture according to claim 1, comprising the above.

3. The third reflective surface comprises a third reflective surface main portion that totally reflects light from the first reflective surface main portion in the Y+ direction, and a third reflective surface sub portion that totally reflects light from the first reflective surface sub portion in the Y+ direction. The third reflective surface main portion and the third reflective surface sub portion are arranged offset from each other in the X direction and the Z direction. The fourth reflective surface comprises a fourth reflective surface main portion that totally reflects light from the second reflective surface main portion in the Y+ direction, and a fourth reflective surface sub portion that totally reflects light from the second reflective surface sub portion toward the Y+ direction. The fourth reflective surface main portion and the fourth reflective surface sub portion are arranged offset from each other in the X direction and the Z direction. The lens structure for a vehicle light fixture according to claim 2.

4. A fifth reflective surface is provided on the Y+ side of the first and second reflective surfaces, with its orientation perpendicular to the surface inclined with respect to the Z direction, causing total internal reflection of light in the Z+ direction in the Y+ direction. Light guided in the Y+ direction via the fifth reflective surface, Light guided in the Y+ direction via the first main reflective surface and the third main reflective surface, Light guided in the Y+ direction via the first reflective surface sub-part and the third reflective surface sub-part, Light guided in the Y+ direction via the second main reflective surface portion and the fourth main reflective surface portion, The light guided in the Y+ direction via the second reflective surface sub-part and the fourth reflective surface sub-part is The following are aligned in the X direction: The lens structure for a vehicle light fixture according to claim 3.

5. The reflective portion includes the first reflective surface, the second reflective surface, the third reflective surface, the fourth reflective surface, and the fifth reflective surface, and is configured to be offset from each other in the Y direction and the Z direction. The lens structure for a vehicle light fixture according to claim 4.

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