VEHICULAR LAMP FITTING

• US 20200132910A1
• Filed: 10/24/2019
• Published: 04/30/2020
• Est. Priority Date: 10/24/2018
• Status: Active Grant

• Current Assignee: Stanley Electric Company Limited
• Original Assignee: Stanley Electric Company Limited
• Inventors: Matsushita, Kazuteru, Takamoto, Yuki
• Granted Patent: US 10,969,533 B2
• Time in Patent Office: Days
• CPC Class Codes: F21S 41/14 characterised by the type of light source
• CPC Class Codes: F21S 41/24 Light guides
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/237 rod-shaped
• CPC Class Codes: F21S 43/239 plate-shaped
• CPC Class Codes: F21S 43/241 of complex shape
• CPC Class Codes: F21S 43/245 emitting light from one or more of its major surfaces
• CPC Class Codes: F21S 43/247 with a single light source being coupled into the light guide
• CPC Class Codes: F21S 43/249 with two or more light sources being coupled into the light guide
• CPC Class Codes: F21S 43/40 characterised by the combination of reflectors and refractors
• CPC Class Codes: G02B 6/0045 by shaping at least a portion of the light guide

Abstract

A vehicular lamp fitting, comprising: a lamp case having an opening edge; a light guide that is disposed in the lamp case; and a light source that emits light which is guided inside the light guide, wherein the light guide includes a bar light-guiding unit and a plate light-guiding unit, the bar light-guiding unit includes a front face disposed on the front side and a rear face disposed on the rear side, the plate light-guiding unit includes a front face disposed on the front side and a rear face disposed on the rear side, and includes one edge connected to an outer peripheral surface of the bar light-guiding unit, and the other edge which is on the opposite side of the one edge, the other edge of the plate light-guiding unit extends along the opening edge in the front view.

Claims

1. A vehicular lamp fitting, comprising:

a lamp case having an opening edge;

a light guide that is disposed in the lamp case; and

a light source that emits light which is guided inside the light guide,

wherein the light guide includes a bar light-guiding unit and a plate light-guiding unit,

the bar light-guiding unit is a bar-shaped light-guiding unit that includes a front face disposed on the front side and a rear face disposed on the rear side, which is on the opposite side of the front side,

the plate light-guiding unit is a plate-shaped light-guiding unit that includes a front face disposed on the front side and a rear face disposed on the rear side, which is on the opposite side of the front side, and includes one edge connected to an outer peripheral surface of the bar light-guiding unit, and the other edge which is on the opposite side of the one edge,

the other edge of the plate light-guiding unit extends along the opening edge in the front view,

the rear face of the bar light-guiding unit includes a plurality of first structures configured to diffuse the light from the light source, which is guided inside the light guide, and allow the light to emit through the front face of the bar light-guiding unit, and

the rear face of the plate light-guiding unit includes a plurality of second structures configured to diffuse the light from the light source, which is guided inside the light guide, and allow the light to emit through the front face of the plate light-guiding unit.

2. The vehicular lamp fitting according to claim 1,

wherein the front face of the bar light-guiding unit is a curved surface of which cross-sectional shape, when sectioned by a plane that is orthogonal to the longer direction of the bar light-guiding unit, is an arc which is convex toward the front side,

the rear face of the bar light-guiding unit includes a pair of side faces, of which the cross-sectional shape, when sectioned by a plane that is orthogonal to the longer direction of the bar light-guiding unit, is a pair of arcs, which are convex toward the inside of the bar light-guiding unit and of which space decreases as approaching the rear side, and a hindmost face that connects the pair of side faces, so that the cross-sectional shape, when sectioned by a plane that is orthogonal to the longer direction of the bar light-guiding unit, becomes a line connecting the edges of the pair of arcs, and

the hindmost face includes the first structure.

3. The vehicular lamp fitting according to claim 1, further comprising a reflection surface, wherein

the reflection surface is disposed on the rear side of the light guide so as to face the rear face of the light guide.

4. The vehicular lamp fitting according to claim 1, wherein the reflection surface is disposed on the bottom portion of the lamp case.

5. The vehicular lamp fitting according to claim 1,

wherein the light guide includes a first bar light-guiding unit, a second bar light-guiding unit, a first plate light-guiding unit and a second plate light-guiding unit,

the first bar light-guiding unit and the second bar light-guiding unit are bar-shaped light-guiding units each of which includes a front face disposed on the front side and a rear face disposed on the rear side, which is on the opposite side of the front side, and are disposed in parallel via a space,

the first plate light-guiding unit is a plate-shaped light-guiding unit which includes a front face disposed on the front side and a rear face disposed on the rear side, which is on the opposite side of the front side, and includes one edge connected to an outer peripheral surface of the first bar lighting-guiding unit, and the other edge disposed on the opposite side of the one edge,

the other edge of the first plate light-guiding unit extends along the opening edge in the front view,

the second plate light-guiding unit is a plate-shaped light-guiding unit which includes a front face disposed on the front side and a rear face disposed on the rear side, which is on the opposite side of the front side, and includes one edge connected to an outer peripheral surface of the first bar light-guiding unit, and the other edge connected to an outer peripheral surface of the second bar light-guiding unit,

each of the rear faces of the first and second bar light-guiding units includes a plurality of first structures configured to diffuse the light from the light source, which is guided inside the light source, and allow the light to emit through each of the front faces of the first and second bar light-guiding units respectively, and

each of the rear faces of the first and second plate light-guiding units includes a plurality of second structures configured to diffuse the light from the light source, which is guided inside the light guide, and allow the light to emit through each of the front faces of the first and second plate light-guiding units respectively.

6. The vehicular lamp fitting according to claim 1,

comprising a plurality of light guides,

wherein the plurality of light guides include at least a first light guide and a second light guide, and

the first light guide and the second light guide are disposed in a state of being at least partially overlapped in the front view.

7. The vehicular lamp fitting according to claim 6, wherein the first light guide and the second light guide are disposed in a state where the bar light-guiding unit of the first light guide and the bar light-guiding unit of the second light guide are partially overlapped, the bar light-guiding unit of the first light guide and the plate light-guiding unit of the second light guide are partially overlapped, and the plate light-guiding unit of the first light guide and the plate light-guiding unit of the second light guide are partially overlapped in the front view.

8. The vehicular lamp fitting according to claim 6,

wherein the opening edge is an opening edge that surrounds a first space which extends in a first direction, and a second space which extends in a second direction which crosses the first direction,

the first light guide is disposed in a first space in a state where the bar light-guiding unit of the first light guide extends in the first direction, and

the second light guide is disposed in the second space in a state where the bar light-guiding unit of the second light guide extends in the second direction.

9. The vehicular lamp fitting according to claim 1,

further comprising a substrate on which the light source is mounted,

wherein the light guide further comprises a fixing unit to which the substrate is fixed, and

the substrate is fixed to the fixing unit in a state where the light source faces one end face of the bar light-guiding unit.

10. The vehicular lamp fitting according to claim 9, wherein the lamp case further comprises an extended portion which extends backward from the opening edge in a state of maintaining a space from the lamp case, and

the substrate is disposed in the space between the lamp case and the extended portion.

11. The vehicular lamp fitting according to claim 8,

wherein the opening edge is a T-shaped opening edge that surrounds the first space and the second space.