JP2018063775A - Vehicular lighting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a reduction in the volume of light guided to a light guide member.SOLUTION: A tail lamp 10 includes: a light source 16 for irradiating with light; a plate-form light guide member 18 to which light of the light source 16 is guided from an end portion in a direction orthogonal to a thickness direction and that includes an irradiation surface 18C on one side in the thickness direction, the surface irradiated with the guided light. Further, the tail lamp 10 includes a reflector 20 for shielding a portion of the light guide member 18, the portion to which the light of the light source 16 is guided. The reflector 20 includes a lower reflection member 22 and an upper reflection member 24 that are oppositely disposed in a thickness direction of the light guide member 18. A surface of the lower reflection member 22, the surface facing the upper reflection member 24, and a surface of the upper reflection member 24, the surface facing the lower reflection member 22, constitute reflection surfaces (i.e., an upper-side reflection surface 24A and a lower-side reflection surface 22A) for reflecting the light of the light source 16. Thus, the light reflected on the reflection surface is guided to the light guide member 18.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicular lamp.

  Patent Document 1 listed below discloses a vehicular lamp (vehicle lighting device) including a long light guide member (light guide) through which light from a light source is guided. In this vehicular lamp, light from the light source is guided from one end in the longitudinal direction of the light guide member.

JP, 2006-046006, A

  By the way, in the vehicle lamp provided with the light guide member, it is desired to suppress a reduction in the amount of light guided to the light guide member.

  In view of the above facts, an object of the present invention is to provide a vehicular lamp that can suppress a reduction in the amount of light guided to a light guide member.

  The vehicular lamp according to claim 1 is a light source for irradiating light, and is formed in a plate shape, and light from the light source is guided from an end portion in a direction orthogonal to the thickness direction, and the surface on one side in the thickness direction. A light guide member that is an irradiation surface irradiated with light guided by the light source, and a portion of the light guide member that guides the light of the light source, and is opposed to the light guide member in the thickness direction. The first opposing portion and the second opposing portion are arranged, and the surface of the first opposing portion on the second opposing portion side and the surface of the second opposing portion on the first opposing portion side reflect the light of the light source. And a reflector for guiding the light reflected by the reflecting surface to the light guide member.

  According to the vehicle lamp of the first aspect, the light emitted from the light source is guided to the light guide member. And the light of the light source guided by the light guide member is irradiated from the irradiation surface of the light guide member. Here, in the first aspect of the present invention, the portion of the light guide member where the light from the light source is guided is covered by the reflector having the above configuration. Therefore, a part of the light emitted from the light source is reflected by the reflecting surface of the first facing portion and the reflecting surface of the second facing portion and guided to the light guide member. Thus, in the first aspect of the invention, the light from the light source can be guided to the light guide member.

  The vehicular lamp according to the present invention has an excellent effect that the amount of light guided to the light guide member can be reduced.

It is a top view which decomposes | disassembles and shows the tail lamp of this embodiment. It is a rear view which shows the rear part of the vehicle provided with the tail lamp of this embodiment. (A) And (B) is explanatory drawing for demonstrating the path | route of the light irradiated from the light source, (A) has shown the cross section which looked at the light guide member from the thickness direction, (B) These show the cross section which looked at the light guide member from the width direction. (A)-(D) are expanded sectional views which show the variation of arrangement | positioning of a light source.

  A vehicular lamp according to an embodiment of the present invention will be described with reference to FIGS. Note that an arrow FR appropriately shown in each drawing indicates a vehicle front-rear direction front side, an arrow UP indicates a vehicle vertical direction upper side, an arrow RH indicates a vehicle width direction right side, and an arrow LH indicates The left side in the vehicle width direction is shown. In the following description, when using the front / rear, top / bottom and left / right directions, the front / rear direction of the vehicle, the top / bottom direction of the vehicle's vertical direction, and the left / right direction of the vehicle width direction are indicated.

  As shown in FIG. 2, the tail lamps 10 as the vehicle lamps of the present embodiment are provided on the right side and the left side of the rear portion 12 </ b> R of the vehicle 12. Note that the tail lamp 10 provided on the right side of the rear portion 12R of the vehicle 12 and the tail lamp provided on the left side are configured symmetrically in the vehicle width direction with the center line 12C of the vehicle 12 in between. The tail lamp 10 provided on the right side of the rear part 12R of 12 will be described.

  As shown in FIG. 1, the tail lamp 10 has a case 14 (see FIG. 2) that constitutes a part of its outer case, a light source 16 disposed in the case 14, and light emitted from the light source 16 is guided. The light guide member 18 is configured to irradiate the guided light toward the rear side, and the reflector 20 is attached to the light guide member 18.

  As shown in FIGS. 1 and 2, the case 14 is formed in a box shape in which the light source 16, the reflector 20, and the light guide member 18 are arranged, and the rear portion of the case 14 is transparent. Lens portion 14A. Thereby, the light irradiated to the back side from the light guide member 18 can permeate | transmit the lens part 14A.

  As shown in FIG. 1, the light source 16 can be irradiated with light when energized, and the light source 16 of the present embodiment is an LED as an example. The light source 16 is attached (fixed) to a reflector 20 described later in a state where the light irradiation direction is directed to the rear side.

  The light guide member 18 is formed in a rectangular plate shape having a longitudinal direction in the vehicle width direction using transparent resin or glass. The light guide member 18 is fixed to the case 14 in a state where the front-rear direction is disposed in the thickness direction in the case 14 (see FIG. 2). In addition, a plurality of protrusions 18A protruding toward the front side are formed on the front surface of the light guide member 18 along the vertical direction, and the plurality of protrusions 18A are arranged in the vehicle width direction. Has been. Further, the front end surface of the protruding portion 18A in the protruding direction is an inclined surface 18B that is inclined rearward as it goes inward in the vehicle width direction. Further, the rear surface of the light guide member 18 is an irradiation surface 18 </ b> C formed in a planar shape extending in the vertical direction and the width direction. And most of the light of the light source 16 guided to the light guide member 18 is irradiated from the irradiation surface 18C toward the rear side. Further, the left end of the light guide member 18 is a reflector locking portion 18D where a reflector 20 described later is locked. Further, the left end surface of the light guide member 18 is a light incident surface 18E covered by the reflector 20, and light from the light source 16 is incident (guided) from the light incident surface 18E. .

  The reflector 20 has a divided structure including a lower-side reflecting member 22 as a first facing portion and an upper-side reflecting member 24 as a second facing portion that are engaged in a state of being opposed to each other in the front-rear direction. .

  The lower-side reflecting member 22 is formed in a rectangular plate shape whose thickness direction is the front-rear direction. The front surface of the lower-side reflecting member 22 is a lower-side reflecting surface 22A as a reflecting surface capable of reflecting light by performing aluminum vapor deposition or the like. In addition, an insertion hole 22 </ b> B into which the light source 16 is inserted is formed at the center in the vertical direction and the width direction of the lower side reflection member 22. And the light source 16 is being fixed to the lower side reflection member 22 in the state inserted in insertion hole 22B.

  As shown in FIGS. 3A and 3B, the upper-side reflecting member 24 is formed in a concave shape in which the lower-side reflecting member 22 side is opened. A surface on the lower-side reflecting member 22 side of the upper-side reflecting member 24 is an upper-side reflecting surface 24A as a reflecting surface that can reflect light by performing aluminum vapor deposition or the like. Describing each part of the upper-side reflecting member 24 in detail, as shown in FIG. 3B, the upper-side reflecting member 24 faces the lower-side reflecting member 22 in the front-rear direction and the lower-side reflecting member 22. And a top wall portion 24 </ b> B extending substantially in parallel. 3A, the upper-side reflecting member 24 connects the top wall portion 24B and the lower-side reflecting member 22 and has a substantially U-shaped cross section when viewed from the thickness direction of the light guide member 18. The peripheral wall portion 24C is provided. The left portion 24CL of the peripheral wall portion 24C is curved into a shape in which the lower reflection member 22 side is opened. In other words, the left portion 24 </ b> CL in the peripheral wall portion 24 </ b> C does not extend in parallel with the lower-side reflecting member 22.

  The rear end portion of the upper-side reflecting member 24 described above is locked to the lower-side reflecting member 22, thereby forming the bottomed box-shaped reflector 20 whose right side is open. The right end portion of the reflector 20 is locked to the reflector locking portion 18D of the light guide member 18, so that the light incident surface 18E of the light guide member 18 is covered by the reflector 20. .

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIGS. 2 and 3B, when light 32 is emitted from the light source 16 by operating a switch of the vehicle 12 of this embodiment, most of the light 32 is reflected by the reflector 20. After being reflected by the reflecting surfaces (upper side reflecting surface 24A and lower side reflecting surface 22A), the light is guided from the light incident surface 18E of the light guide member 18 to the light guide member 18. And most of the light 32 guided to the light guide member 18 is irradiated to the rear side of the vehicle 12 from the irradiation surface 18 </ b> C of the light guide member 18.

  Here, as shown in FIGS. 3A and 3B, in this embodiment, the light incident surface 18 </ b> E of the light guide member 18 is covered with the reflector 20. Thereby, the light 32 of the light source 16 can be guided to the light guide member 18 without leakage. That is, in the present embodiment, it is possible to suppress the amount of the light 32 guided to the light guide member 18 from being reduced. As a result, the amount of light of the tail lamp 10 can be secured without increasing the output of the light source 16, and power saving of the tail lamp 10 can be achieved. In particular, the configuration of the present embodiment is useful when the light guide member 18 is thin.

  In addition, although this embodiment demonstrated the example which formed the surrounding wall part 24C of the upper side reflection member 24 in the substantially U-shaped cross section, this invention is not limited to this. For example, you may form the surrounding wall part 24C of the upper side reflection member 24 in a polygonal cross section. Further, as shown in FIGS. 4A, 4C, and 4D, the left side portion 24CL of the peripheral wall portion 24C is linearly inclined to bend between the peripheral wall portion 24C and the top wall portion 24B. The part 24D may be formed.

  Moreover, although this embodiment demonstrated the example in which the said light source 16 was fixed to the lower side reflection member 22 in the state in which the irradiation direction of the light of the light source 16 was orient | assigned to the back side, this invention is limited to this. Not. For example, as shown in FIGS. 4B and 4C, the light source 16 is used as the lower-side reflecting member 22 in a state where the light irradiation direction of the light source 16 is inclined to the right side or the left side with respect to the rear side. It may be fixed. Further, as shown in FIG. 4D, the light source 16 may be fixed to the upper-side reflecting member.

  Furthermore, the present invention can be applied not only to the tail lamp 10 but also to other vehicle lamps such as a head lamp and a back lamp.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

10 Tail lamp (vehicle lamp)
16 Light source 18 Light guide member 18B Inclined surface 20 Reflector 22 Lower side reflection member (first facing portion)
22A Lower reflective surface (reflective surface)
24 Upper side reflection member (second facing part)
24A Upper side reflective surface (reflective surface)

Claims (1)

A light source that emits light;
A light guide that is formed in a plate shape and is guided by light from the light source from an end in a direction perpendicular to the thickness direction, and is irradiated with light that is guided on one surface in the thickness direction. Members,
The light guide member covers a portion where the light of the light source is guided, and has a first facing portion and a second facing portion arranged to face each other in the thickness direction of the light guide member, and the first facing portion. The surface on the second facing portion side of the portion and the surface on the first facing portion side of the second facing portion are reflecting surfaces that reflect the light of the light source, and the light reflected by the reflecting surface is transmitted to the light guide member. A light-guided reflector;
Vehicular lamp equipped with