JP2019085091A - Vehicle lighting system - Google Patents

Abstract

To provide a vehicle lighting system having high flexibility in a mounting position and capable of emitting light from a wide area in a light emission part.SOLUTION: A vehicle lighting system 30 includes a light source 32 and a light guide body 40. The light guide body 40 includes a light emission part 45, and a light incident part 42 which is branched from the light emission part 45 and extended, the extended end surface 42A of which is provided with a light incident surface 41, and which is structured so that light incident from the light incident surface 41 and travelling along the extending direction enters into the light emission part 45 and is entirely reflected on a side surface 45C. The light incident surface 41 is arranged facing the light source 32 and is formed in a convex surface shape protruding to the side of the light source 32. The light emission part 45 has a reflection surface 47B reflecting the light travelling along the extending direction. The light emission surface 46 includes: a first area 46A located in a travelling direction of the light incident into the light incident surface 41 with respect to a position P1 where the light incident part 42 is branched; and a second area 46B located in a direction opposite to the travelling direction of the light incident into the light incident surface 41.SELECTED DRAWING: Figure 7

Description

  The technology disclosed by the present specification relates to a vehicle lighting device.

  As a lamp unit, one disclosed in Patent Document 1 below is known. It is described that the lamp unit disclosed in Patent Document 1 includes a light guide and a light source, and the light guide includes a light guide, a light incident part, and a connecting part. And, in the lamp unit provided with the two light incident parts, the light incident to the two light incident parts is surely guided to both ends in the extending direction of the light guiding part, and only one light incident part In the lamp unit provided with the light source, a part of the light emitted from the light source is incident as leaked light to the connecting portion, and light is also transmitted to the end of the linear portion (light guiding portion) connected from the connecting portion to the connecting portion. Is described.

WO 2015/029852

  However, in the configuration disclosed in Patent Document 1, it is necessary to provide at least two or more light sources in the lamp unit provided with two light incident parts, in which the restriction on the mounting position is larger than that of the light guide. There is a problem with the low degree of freedom in mounting position of the unit.

  Further, in the configuration disclosed in Patent Document 1, in the lamp unit provided with only one light incident portion, part of the light emitted from the light source is incident as leaked light to the coupling portion, and the light is guided from the coupling portion In the configuration in which light is also incident on the end of the unit, light can not be emitted from a position away from the light source at the end of the light guide, and light may be emitted from a wide area in the light guide Can not.

  The technology disclosed by the present specification has been completed based on the above circumstances, has a high degree of freedom in mounting position, and is capable of emitting light from a wide area in the light emitting portion. It is an object of the present invention to provide a lighting device.

  The vehicle lighting device disclosed by the present specification is a vehicle lighting device including a light source, and a light guiding body that emits light from the light source toward the vehicle interior while guiding the light from the light source, The light body has a light emitting surface extending along a predetermined direction and emitting light to the side surface, and guiding the light from the light source in the extending direction into the vehicle room from the light emitting surface The light emitting portion for emitting toward the light emitting side, the light emitting portion having a light incident surface which is branched and extended from the light emitting portion and on which the light from the light source is incident on the extended tip end surface, is incident from the light incident surface A light incident portion configured such that light traveling along the extending direction enters the light emitting portion and is totally reflected by the side surface, and the light incident surface is disposed to face the light source And a convex shape protruding toward the light source side, and the light emitting portion extends in the extending direction. The end surface located in the advancing direction of the light which injected into the said light-incidence surface among reflecting end surfaces has a reflective surface which reflects the light which travels along the said extending direction, and the said light-projection surface is said light-incidence A first region located in the traveling direction of light incident on the light incident surface and a second region located in the opposite direction to the traveling direction of light incident on the light incident surface with respect to the position where the unit branches; And.

  According to such a vehicle lighting device, by having the light entrance portion branched from the light exit portion, it is possible to temporarily compare the light entrance portion with the light entrance portion extended from the end face in the extension direction of the light exit portion. It is possible to increase the mounting position freedom of the vehicle lighting device. Then, by providing such a light entrance portion, it is difficult to cause sufficient light to be emitted from the second region of the light exit surface, the light entrance surface is made convex and the light exit portion has a reflecting surface. Can be eliminated by providing Specifically, since light is incident on the convex light incident surface, light rays traveling inside the light emitting portion are mutually parallelized as compared with a configuration in which the light incident surface is temporarily made flat. Thus, the amount of light reaching the reflective surface can be increased. Furthermore, by reflecting the light collimated to each other by the reflection surface, more light can be advanced to the second region side, and the amount of light emitted from the second region can be increased. As a result, it has become possible to provide a vehicle lighting device having a high degree of freedom in mounting position and capable of emitting light from a wide area in the light emitting portion.

  In the above configuration, the second region may extend to a position farther from the position of the light incident surface than the position where the light incident portion branches. In such a configuration, with respect to the position of the light incident surface, the arrangement range of the light emission surface is not limited, and the mounting position freedom is further enhanced, and light is emitted from a wide area in the light emission portion. A lighting device capable of emitting light can be provided.

  In the above configuration, the light emitting portion is formed with a light rising portion configured to raise light toward the light emitting surface side, and the light rising portion is in the width direction of the light emitting portion. Grooves extending in parallel along the extending direction of the light emitting portion, wherein the grooves are directed toward the second region from a portion where light is raised toward the first region. The portion for raising the light may be arranged more densely. According to such a configuration, the amount of light emitted from the first region and the amount of light emitted from the second region can be made uniform, which is preferable.

  In the above-described configuration, a vehicle interior including a first board member, a second board member, and a plurality of attachment portions for attaching an edge portion of the first board member to the second board member. The light guide is disposed on the edge side of the plurality of attachment portions along the edge of the first board member, and the light incident portion is disposed on the light guide The plurality of attachment portions may be extended apart from the edge of the first board member. According to such a configuration, the light emitting portion can be disposed on the edge side of the plurality of mounting portions while avoiding interference between the light source and the mounting portion, and the mounting position freedom of the vehicle lighting device is large. Can be realized.

  According to the technology disclosed by the present specification, it is possible to provide a vehicle lighting device having a high degree of freedom in mounting position and capable of emitting light from a wide area in the light emitting portion.

Front view of a door trim on which a lighting device according to Embodiment 1 is installed Partial cross-sectional view of the door trim (a view cut along the line II-II in FIG. 1) Partial cross-sectional view of the door trim (a view taken along the line III-III in FIG. 2, with the outer lens omitted) A view of the light guide from the inside of the passenger compartment Explanatory drawing seen from the vehicle upper direction which shows typically the advancing aspect of the light in the inside of a light guide. Explanatory view viewed from the rear of the vehicle schematically showing the progress of light inside the light guide Explanatory drawing seen from the vehicle interior side which shows typically the advancing aspect of the light in the inside of a light guide The light guide which concerns on Embodiment 2 seen from the vehicle interior side

First Embodiment
Embodiment 1 will be described with reference to FIGS. 1 to 8. In the present embodiment, a lighting device 30 installed on a door trim 10 which is an example of a vehicle interior material will be illustrated as a vehicle lighting device. In each figure, arrows FR and RR indicate the front and rear of the vehicle, arrows UP and DW indicate the upper and lower portions of the vehicle, respectively, and arrows IN and OUT indicate the passenger compartment (vehicle interior) side and The outside of the vehicle (outside of the vehicle) is shown.

  As shown in FIG. 1, the door trim 10 constitutes a vehicle interior side portion of a vehicle door, and is attached to a door inner panel (not shown) from the vehicle interior side. The door trim 10 includes an armrest 12 and a door inside handle 18 disposed above the armrest 12. Furthermore, the door trim 10 includes a door pocket 14 (pocket) disposed below the armrest 12, a pull handle 16, and a speaker grill 17.

  The door trim 10 is mainly configured of a trim board 20, as shown in FIG. The trim board 20 is composed of a plurality of parts assembled to one another. As each part which comprises the trim board 20, the lower board 27, the upper board 26, the armrest board 28, and the decoration board 21 are mainly mentioned.

  As shown in FIG. 3, the decorative board 21 includes a first board 22 (first board member), a second board 23 (second board member), and an edge 22A of the first board 22. A mounting portion 24 for mounting to the two boards 23 is provided. As shown in FIG. 1, the first board 22 has an opening in which the door inside handle 18 is disposed, and is disposed around the door inside handle 18. The edge 22A of the first board 22 located on the lower side of the vehicle is adjacent to the second board 23. The first board 22 has an elongated slit-like opening 25 formed between the lower end of the edge 22A and the second board 23 (see FIG. 2).

  The second board 23 is disposed below the first board 22 and above the armrest 12 as shown in FIGS. 1 and 2. The second board 23 is a member called a so-called ornament whose surface on the vehicle interior side is covered with a skin material. The second board 23 has an inclined surface 23A extending downward from the opening edge of the opening 25 toward the vehicle interior and a general surface 23B extending downward from the inclined surface 23A. doing. The second board 23 has an irradiated area to which the light emitted from the illumination device 30 is irradiated on the inclined surface 23A. In other words, the second board 23 has a shelf-shaped irradiated area adjacent to the edge 22A of the first board 22.

  A plurality of mounting portions 24 are provided in a dotted manner in the extending direction of the edge portion 22A of the first board 22 (see FIG. 1). As shown in FIG. 3, for example, the mounting portion 24 has a mounting boss 24 A erected on the outer surface of the first board 22 at the circumferential end of the second board 23. It is inserted into an attachment hole 24B which is formed through a flange-like portion extending outward of the passenger compartment and fixed to each other using fastening means such as screw tightening and heat caulking. The second board 23 is provided with the light source unit 31 so that the portion where the light source unit 31 described later is installed is cut out in a portion extending in a flange shape outside the casing of the first board 22. It is possible to secure a space for

  As shown in FIG. 2, the lighting device 30 is disposed outside the cabin of the first board 22 and is an indirect lighting device that illuminates the second board 23 through the opening 25. In detail, the illumination device 30 is configured such that a light emitting unit 45 described later faces the vehicle interior through the opening 25 and emits light toward the inclined surface 23A. With such a configuration, the lighting device 30 can illuminate the illuminated region at a position where it is difficult for the occupant to enter the field of view.

  The illuminating device 30 is provided with the light source 32 and the light guide 40 which radiates | emits towards a vehicle interior, guiding the light from the light source 32, as FIG.1 and FIG.2 shows. The illumination device 30 emits light in the form of a line from the light emission portion 45 of the light guide 40, and is used as line illumination capable of irradiating light to the long irradiation target area. In the present embodiment, the lighting device 30 comprises a single light source 32. In such a configuration including the single light source 32, the degree of freedom in arrangement of the light source 32 (the light source unit 31) is high as compared with the configuration including the plurality of light sources 32, The amount of light emitted from the two-light emitting unit 45B tends to be small, and it can be said that the present technology is more effective.

  The light source 32 is a point light source such as an LED as shown in FIG. 3 and is mounted on the substrate 34. In FIG. 7, the light source 32 is schematically shown by dots. Although the light source 32 has a large amount of light traveling along the optical axis passing through the center of the light emitting surface 32A, the light source 32 is configured to emit light with a light component that diffuses radially. The substrate 34 on which the light source 32 is mounted is housed in the case 36. The case 36 is provided with a light incident surface arrangement portion 36A which is opened at a position facing the light emitting surface 32A of the light source 32 and for arranging a light incident surface 41 described later of the light guide 40. Thus, the light source unit 31 including the light source 32, the substrate 34, and the case 36 is configured.

  The light source 32 is disposed at a position away from the edge 22A of the first board 22 with respect to the mounting portion 24 at a position facing the light incident surface 41 of the light guide 40 described later, as shown in FIG. ing. The light source 32 is configured to occupy a larger arrangement space than the light guide 40 in the outer direction of the vehicle interior and the vertical direction of the vehicle because of the configuration provided in the light source unit 31. In the vicinity of the edge 22A of the first board 22 where the lighting device 30 is installed, the space in the vehicle interior-outside direction narrows as it goes downward. Further, at the edge 22A of the first board 22, a mounting portion 24 is provided at a predetermined position. For this reason, the light source 32 is disposed at a position away from the edge 22A from the light emitting portion 45 of the light guide 40 so as to avoid the attachment portion 24 and secure an arrangement space of the light source unit 31.

  The light guide 40 is made of a substantially transparent synthetic resin material whose refractive index is sufficiently higher than that of air. In the present embodiment, the light guide 40 is made of an acrylic resin having a critical angle of about 42.2 °. The light guide 40 is configured to propagate the inside while totally reflecting it, when light traveling inside is incident on the interface with the outside air layer at an incident angle larger than the critical angle.

  As shown in FIG. 4, the light guide 40 has a light emission surface 46 extending along the first direction (predetermined direction) and emitting light to the side surface 45 C, and from the light source 32 A light emitting portion 45 for emitting light from the light emitting surface 46 toward the vehicle room while guiding light in the extending direction, and a branch from the light emitting portion 45 and extending from the light source 32 to the extending distal end surface 41C Light incident from the light incident surface 41 and traveling along the extending direction enters the light emitting portion 45 and is totally reflected by the side surface 45 C. And the light incident portion 42. Assuming that the extending direction of the light incident portion 42 is a second direction, an angle θ (0 ° ≦ θ ≦ 180 °) formed by the first direction and the second direction is from 90 ° to the critical angle of the light guide. The angle is smaller than the angle drawn (θ ≦ 90 ° −critical angle). The “first direction (predetermined direction)” is one direction in the surface direction of the trim board, and in the present embodiment, is the vehicle longitudinal direction. Further, the “second direction” is a direction different from the one direction in the surface direction of the trim board 20, and in the present embodiment, has an angle of about 25 ° to 40 ° with respect to the first direction. And the direction to cross.

  In the light guide 40, as shown in FIG. 1, the light emitting portion 45 is disposed along the edge 22A of the first board 22 from the plurality of attachment portions 24 to the edge 22A, and the light incident portion 42. Are extended apart from the edge 22A of the first board 22 between the plurality of mounting portions 24, 24. As shown in FIG. The light guide 40 is held by the outer lens 49 assembled to the opening 25 (see FIG. 2). The outer lens 49 is made of a transparent resin that can transmit light emitted from the light emitting unit 45, and is configured to be capable of housing the light emitting unit 45 therein. With such a configuration, the illumination device 30 refracts light emitted from the light emitting portion 45 twice when entering and exiting when passing through the outer lens 49, and the light distribution direction thereof is directed to the vehicle interior side. It is configured to face (see FIG. 6). The light guiding portion 40 is disposed so that the light emitting portion 45 housed in the outer lens 49 is disposed in the opening 25 and the light incident portion 42 is covered by the first board 22 from the vehicle interior side .

  As shown in FIG. 4, the light emitting portion 45 has a substantially prismatic shape having a cross-sectional shape of approximately the same size throughout the entire area in the extending direction. The light emitting portion 45 has a surface on the upper side of the vehicle and a surface on the lower side of the vehicle substantially parallel, and has a light emitting surface 46 on the surface on the lower side of the vehicle. Further, the light emitting portion 45 is formed with a light rising portion 48 configured to raise the light toward the light emitting surface 46 (see FIG. 5). Furthermore, the light emitting portion 45 has a chamfered portion 48C at the corner on the vehicle interior side and the upper side of the vehicle, and the light raised by the light rising portion 48 is reflected by the chamfered portion 48C, and the light emitting surface It is configured to be directed to the 46 side (see FIG. 7). In the following description, a portion of the light emitting portion 45 located in the traveling direction of light incident on the light incident surface 41 with respect to the position P1 where the light incident portion 42 branches is called a first light emitting portion 45A, A portion located in a direction opposite to the traveling direction of the light incident on the light incident surface 41 is referred to as a second light emitting portion 45B. Then, in the light emitting portion 45, a surface that is positioned in the traveling direction of the light incident on the light incident portion 42 and reflects light from the light incident portion 42 is referred to as a first reflection surface 47A. The first reflection surface 47 </ b> A is disposed in the vicinity of the position P <b> 1 of the surface of the light emitting unit 45 outside the passenger compartment.

  As shown in FIG. 4, the light emitting portion 45 travels along the extending direction to the end surface 45A1 of the end surfaces 45A1 and 45B1 in the extending direction, which is located in the traveling direction of the light incident on the light incident surface 41. And a second reflection surface 47B (reflection surface) that reflects the light. That is, the second reflection surface 47 </ b> B is disposed on the end face of the light emitting portion 45 on the side of the first light emitting portion 45 </ b> A. The second reflection surface 47 </ b> B is a smooth surface orthogonal to the extending direction of the light emitting portion 45. In the present embodiment, the end face on the second light emitting part 45B side of the light emitting part 45 is also configured the same as the second reflecting surface 47B, and a third reflecting surface that reflects the light traveling along the extending direction Configure 47C. With such a configuration, the amount of leaked light from the light emitting unit 45 is reduced.

  As shown in FIG. 4, the light emitting surface 46 has a first region 46A located in the traveling direction of light incident on the light incident surface 41 and a light incident surface at a position P1 where the light incident portion 42 branches. And a second region 46B located in a direction opposite to the traveling direction of the light incident on the. That is, in the light emitting surface 46, the first region 46A is located at the first light emitting portion 45A, and the second region 46B is located at the second light emitting portion 45B.

  The second region 46B extends to a position farther from the position of the light incident surface 41 with respect to the position P1 where the light incident portion 42 branches, as shown in FIG. 3. Specifically, the light emitting portion 45 opens the space for arranging the light source unit 31 in front of the mounting portion 24 (front of the vehicle) and extends to the front, whereas the second light emitting portion 45 B It is extended to a position equal to or exceeding the mounting portion 24.

  As shown in FIG. 5, the light rising portion 48 is constituted by a groove portion 48B formed in a protruding portion 48A which protrudes from a surface on the outer side of the passenger compartment. The light rising portion 48 has a configuration in which grooves 48B extending along the width direction of the light emitting portion 45 are arranged in parallel along the extending direction of the light emitting portion 45.

  As shown in FIG. 4, the groove 48B is denser in the portion that raises the light toward the second region 46B than the portion that raises the light toward the first region 46A. In the present embodiment, the width dimension of the protrusion 48A is larger in the second light emitting portion 45B than in the first light emitting portion 45A, and in the first light emitting portion 45A and the second light emitting portion 45B, The parallel pitch of the grooves 48B is equal, and the length dimension of the grooves 48B is changed. That is, in the groove portion 48B, the arrangement density in the second light emitting portion 45B is higher than the arrangement density in the first light emitting portion 45A. The groove 48B has a V-shaped cross sectional view, and the light traveling along the extending direction of the inside of the light emitting portion 45 is chamfered at the side surface of the groove 48B (point A in FIGS. 5 and 6) The light reflected toward the 48C side and reflected at the chamfered portion 48C (at the same point B) is configured to be emitted from the light emitting surface 46 (at the same point C). In the present embodiment, the groove 48B is configured to be deeper and wider in the second light emitting portion 45B than in the first light emitting portion 45A.

  The light incident portion 42 is branched from a surface (in the present embodiment, the upper surface of the vehicle in the present embodiment) of the side surface 45C of the light emitting portion 45, as shown in FIG. It has a shape that stands up backward. Then, the light traveling toward the lower side and the front side of the vehicle along the extending direction of the light incident portion 42 is totally reflected by the first reflection surface 47A of the light emitting portion 45, and the vehicle front (first light emitting portion It is comprised so that it may advance toward 45 A side). With such a configuration, the light incident portion 42 is allowed to propagate to the light emitting portion 45 side without leaking light which is incident on the light incident surface 41 and travels inside.

  As shown in FIG. 3, the light incident portion 42 has a substantially cylindrical shape having a diameter smaller than that of the light emission portion 45, and the extending base end surface is connected to the side surface 45C of the light emission portion 45 at the position P1. The light emitting portion 45 is connected to the light emitting portion 45 by a thin flat connecting portion 43. Further, in the light incident portion 42, the extended leading end surface 42A located above the vehicle and behind the vehicle constitutes a light incident surface 41.

  As shown in FIG. 3, the light incident surface 41 has a convex shape which is disposed to face the light source 32 and protrudes toward the light source 32. The light incident surface 41 travels along the extending direction of the light incident portion 42 by the light advancing while being diffused radially from the light emitting surface 32A of the light source 32 incident with refraction on the convex surface. It is configured.

  Subsequently, the operation of the present embodiment will be described using FIGS. 5 to 7. The light emitted from the light emitting surface 32 A of the light source 32 enters the inside of the light guide 40 from the light incident surface 41 of the light guide 40. At this time, as shown in FIG. 7, the light from the light source 32 is refracted by the light incident surface 41 having a convex shape, so that the light incident surfaces 41 are parallel to each other as compared with the case where the light incident surface 41 is flat. In this state, the light incident portion 42 travels toward the light emitting portion 45 side. The light which has been mutually collimated and entered the light emitting portion 45 is reflected by the first reflection surface 47A, and travels forward in the first light emitting portion 45A toward the front of the vehicle. Among the light traveling toward the front of the vehicle in the first light emitting portion 45A, a portion of the light traveling toward the light rising portion 48 is emitted from the first region 46A of the light emitting surface 46, and the other light is the first The reflection is repeated between the upper surface and the lower surface of the light emitting portion 45A to reach the second reflective surface 47B. The light that has reached the second reflection surface 47B is reflected by the second reflection surface 47B, and travels in the first light emitting portion 45A toward the rear of the vehicle. Among the light traveling toward the rear of the vehicle in the first light emitting portion 45A, a portion of the light traveling toward the light rising portion 48 is emitted from the first region 46A of the light emitting surface 46, and the other light is the first The reflection is repeated between the upper surface and the lower surface of the light emitting portion 45A, and the light travels to the second light emitting portion 45B. Among the light traveling toward the rear of the vehicle in the second light emitting portion 45B, a portion of the light traveling toward the light rising portion 48 is emitted from the second region 46B of the light emitting surface 46, and the other light is the second The reflection is repeated between the surface on the vehicle upper side and the surface on the lower side of the light emitting portion 45B to reach the third reflection surface 47C. The mode in which the light reaching the third reflection surface 47C is reflected is the same as the light reaching the second reflection surface 47B, and the description thereof will be omitted. Although the amount of light traveling in the second light emitting portion 45B is smaller than the amount of light traveling in the first light emitting portion 45A, the arrangement density of the groove portion 48B of the second light emitting portion 45B is the first light emitting portion Because the arrangement density of the groove portions 48B of 45A is higher, the amount of light emitted from the first region 46A and the amount of light emitted from the second region 46B are substantially equal. As a result, a uniform and sufficient amount of light is emitted from the light emitting surface 46 to the inclined surface 23 A of the second board 23.

  Subsequently, the effects of the present embodiment will be described. According to the present embodiment, by providing the light incident part 42 branched from the light emitting part 45, compared with the configuration having the light incident part temporarily extended from the end face in the extending direction of the light emitting part 45, illumination can be obtained. The mounting position freedom of the device 30 can be increased. Then, by providing such a light incident portion 42, it is difficult to cause sufficient light to be emitted from the second region 46B of the light emitting surface 46, while making the light incident surface 41 convex and By providing the second reflecting surface 47B in the portion 45, the problem can be solved. Specifically, in the present embodiment, since light is incident on the convex light incident surface 41, it travels inside the light emitting portion 45 compared to a configuration in which the light incident surface 41 is temporarily made flat. By collimating the light rays, the amount of light reaching the second reflective surface 47B can be increased. Furthermore, by reflecting the light collimated to each other by the second reflection surface 47B, more light can be advanced to the second area 46B side, and the amount of light emitted from the second area 46B can be increased. . As a result, it has become possible to provide the illumination device 30 which has a high degree of freedom in mounting position and can emit light from a wide area in the light emitting unit 45.

  Further, in the present embodiment, the second region 46B extends to a position farther from the position of the light incident surface 41 with respect to the position P1 where the light incident portion 42 branches. In such a configuration, the arrangement range of the light emitting surface 46 is not limited with respect to the position of the light incident surface 41, and the degree of freedom in mounting position is further increased, and a wide area in the light emitting portion 45 is obtained. Thus, it is possible to provide a lighting device 30 capable of emitting light from the light source.

  Further, in the present embodiment, the groove portion 48B is arranged more densely at the portion that raises the light toward the second region 46B than the portion that raises the light toward the first region 46A. Therefore, the amount of light emitted from the first region 46A and the amount of light emitted from the second region 46B can be made uniform, which is preferable.

  Further, in the present embodiment, the light incident portion 42 is extended so as to be apart from the edge portion 22A of the first board 22 between the plurality of attachment portions 24. Therefore, the light emitting portion 45 can be disposed on the edge portion 22A side of the plurality of mounting portions 24 while avoiding the interference between the light source 32 and the mounting portion 24. It can be realized.

Second Embodiment
A second embodiment will now be described with reference to FIG. The light guide 140 of this embodiment differs from the first embodiment in the configuration of the groove 148B. The same parts as those of the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.

  The groove portion 148B is denser in the portion that raises the light toward the second region 46B than the portion that raises the light toward the first region 46A. In the present embodiment, the parallel pitch of the groove portions 148B is smaller in the second light emitting portion 45B than the first light emitting portion 45A, and the groove portions 148B in the first light emitting portion 45A and the second light emitting portion 45B. The length dimension of the is the same aspect. That is, in the groove portion 148B, the disposition density in the second light emitting portion 45B is higher than the disposition density in the first light emitting portion 45A. The other configuration of the groove portion 148B is the same as that of the groove portion 48B of the first embodiment, and the description thereof will be omitted.

Other Embodiments
The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The shape, the arrangement, the number of arrangements, and the configuration of the light guide and the light source can be appropriately changed in addition to the above embodiment. For example, the extending direction of the light incident part can be appropriately changed according to the installation place of the lighting device. In addition, a plurality of light incident portions and light sources may be provided, and light incident portions may be disposed between two different attachment portions among three or more attachment portions.
(2) In the above-described embodiment, the light rising portion having the groove portion is illustrated as a configuration for emitting light from the light emitting portion, but the invention is not limited thereto. For example, the configuration for emitting light from the light emitting portion may be configured by a light reflecting film or the like appropriately disposed in a region other than the light emitting surface on the surface of the light guide. Furthermore, a light reflection film having light reflectivity may be disposed on the end face of the light guide to constitute the second reflection surface.
(3) In the above embodiment, the lighting apparatus is installed in the interior material for a vehicle, and the light emitting unit is disposed along the edge of the first board constituting the decorative board. The installation mode is not limited to this. For example, the lighting device may be appropriately installed in a vehicle display device or the like.
(4) In the said embodiment, although the illuminating device illustrated what comprises indirect illumination, it is not restricted to this. For example, the illumination device may illuminate the opening of a pocket that constitutes a door pocket or a pull handle, and an illumination for decoration that illuminates the vehicle compartment without assuming the surface to be illuminated. May be configured.
(5) In the said embodiment, although the illuminating device for vehicles was illustrated as a vehicle illuminating device, illuminating devices for vehicles, such as aircraft other than vehicles, may be sufficient as a vehicle illuminating device.

  DESCRIPTION OF SYMBOLS 10 door trim (vehicle interior material) 22 first board 22A edge part 23 second board 24 mounting portion 30 lighting device (lighting device for vehicle) 32 light source 40 guiding Light body 41: light incident surface 42: light incident portion 42A: extended end surface 45: light emitting portion 45A1: end surface 45C: side surface 46: light emitting surface 46A: first region 46B: Second region, 47B: second reflection surface (reflection surface), 48: light rising portion, 48B, 148B: groove portion, P1: position

Claims (4)

A vehicle lighting device comprising: a light source; and a light guide for guiding light from the light source toward a vehicle room and emitting the light into the vehicle room,
The light guide is
It has a light emitting surface extending along a predetermined direction and emitting light to the side surface, and emits light from the light emitting surface toward the vehicle interior while guiding the light from the light source in the extending direction. A light emitting portion,
A light incident surface which is branched and extended from the light emitting portion and has a light incident surface to which light from the light source is incident on the extended tip end surface, and light which is incident from the light incident surface and travels along the extending direction A light incident portion configured to enter the light emitting portion and be totally reflected by the side surface,
The light incident surface has a convex shape that is disposed to face the light source and protrudes toward the light source side.
The light emitting portion has a reflecting surface for reflecting the light traveling along the extending direction on the end surface located in the traveling direction of the light incident on the light incident surface among the end surfaces in the extending direction ,
The light emitting surface is a first area located in the traveling direction of light incident on the light incident surface and a traveling direction of light incident on the light incident surface, with respect to the position where the light incident portion branches. And a second region located in the reverse direction.   The vehicle illumination device according to claim 1, wherein the second area extends to a position farther from the position of the light incident surface than the position where the light incident portion branches. The light emitting portion is formed with a light rising portion configured to raise light toward the light emitting surface side,
The light rising portion has a configuration in which grooves extending along the width direction of the light emitting portion are arranged in parallel along the extending direction of the light emitting portion.
The vehicle according to claim 1 or claim 2, wherein the groove portion is disposed closer to the portion that raises the light toward the second region than the portion that raises the light toward the first region. Lighting equipment. A vehicle interior material comprising a first board member, a second board member, and a plurality of attachment portions for attaching an edge of the first board member to the second board member; ,
The light guide is disposed such that the light emitting portion is closer to the edge than the plurality of attachment portions along the edge of the first board member, and the light incident portion includes the plurality of attachments. The vehicle lighting device according to any one of claims 1 to 3, wherein the vehicle lighting device is extended apart from the edge of the first board member between the parts.

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