Vehicle lighting fixtures

Abstract

To provide a vehicular lighting fixture that can improve the appearance of light-emission by preventing light-emission unevenness during lighting.SOLUTION: A light guide body 3 includes a plurality of light guide portions 5 extending in the same direction to each other while light guide portions 5 adjacent to each other are coupled, an incident portion disposed oppositely to a light source, a plurality of reflecting portions 6 respectively disposed on back surface sides of the plurality of light guide portions 5, and a plurality of emitting portions 7 respectively disposed on front surface sides of the plurality of light guide portions 5. The reflecting portion 6 includes a plurality of reflection cuts 6a aligned in an extending direction of the light guide portion 5, and inside reflection surfaces 6b inclined in the opposite direction to each other across a boundary 3a on the back surface side located between the light guide portions 5 adjacent to each other. The inside reflection surface 6b is formed so as to draw a straight line on a cross-section in a direction orthogonal to the extending direction of the light guide portion 5.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vehicle lamp. [Background technology]

[0002] Conventionally, a combination of a light source such as a light-emitting diode (LED) and a rod-shaped or plate-shaped light guide has been known as a vehicle lamp mounted on a vehicle. In such a vehicle lamp, light emitted from the light source enters the base end of the light guide and is guided toward the tip end of the light guide while repeatedly reflecting inside the light guide. In addition, light reflected by multiple reflection cutouts provided on the back side of the light guide is emitted from the front side of the light guide. This makes it possible to make the light-emitting element provided on the front side of the light guide emit light in a line or a plane.

[0003] Furthermore, some vehicle lamps include a light guide body in which adjacent rod-shaped light guide sections are connected together (see, for example, Patent Document 1 below). In vehicle lamps including such a light guide body, light emitted from a plurality of light sources is guided in the same direction by the plurality of light guide sections, and a planar light emitting section formed by these plurality of light guide sections is caused to emit light. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-045895 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-described conventional vehicle lamp, dark areas (uneven light emission) occur between adjacent light guide sections (boundaries), which can lead to poor appearance when lit.

[0006] The present invention has been proposed in view of the above-mentioned conventional circumstances, and aims to provide a vehicle lamp that can improve the appearance of the emitted light by preventing uneven light emission when turned on. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides the following means. [1] A light source; a light guide that guides the light emitted from the light source, The light guide body includes a plurality of light guide portions extending in the same direction with adjacent light guide portions connected to each other; an incident portion disposed opposite the light source and configured to cause light emitted from the light source to enter the light guiding portion; a plurality of reflecting portions arranged on the rear side of the plurality of light guiding portions, respectively, and reflecting the light guided inside the light guiding portions toward the front side of the light guiding portions; a plurality of exit sections disposed on the front side of the plurality of light guide sections, each of which emits the light reflected by the reflecting section to the outside of the light guide section; the reflecting portion includes a plurality of reflection cuts arranged in a direction in which the light guiding portion extends, and inner reflection surfaces inclined in opposite directions across a boundary on a rear side between adjacent ones of the light guiding portions, The inner reflective surface is formed so as to describe a straight line in a cross section in a direction perpendicular to the extending direction of the light guiding section. and is inclined at an angle such that a part of the light reflected by the reflection cut is reflected toward a boundary on the front side located between adjacent ones of the light guiding sections. A vehicle lamp characterized by: [2] A light source; a light guide that guides the light emitted from the light source, The light guide body includes a plurality of light guide portions extending in the same direction with adjacent light guide portions connected to each other; an incident portion disposed opposite the light source and configured to cause light emitted from the light source to enter the light guiding portion; a plurality of reflecting portions arranged on the rear side of the plurality of light guiding portions, respectively, and reflecting the light guided inside the light guiding portions toward the front side of the light guiding portions; a plurality of exit sections disposed on the front side of the plurality of light guide sections, each of which emits the light reflected by the reflecting section to the outside of the light guide section; the reflecting portion includes a plurality of reflection cuts arranged in a direction in which the light guiding portion extends, and inner reflection surfaces inclined in opposite directions across a boundary on a rear side between adjacent ones of the light guiding portions, the inner reflective surface is formed so as to describe a straight line in a cross section in a direction perpendicular to a direction in which the light guiding section extends, the light exit portion includes a light exit surface that is continuous in a direction in which the light guide portion extends, the exit surface is formed so as to describe a convex curve across a front boundary between adjacent ones of the light guiding sections in a cross section perpendicular to a direction in which the light guiding sections extend, The front boundary is formed so as to form a concave curve between adjacent exit surfaces in a cross section perpendicular to the direction in which the light-guiding section extends. [3] The vehicular lamp according to [2], wherein the emission section has a diffusion section that diffuses light emitted from the vicinity of the boundary on the front side. [ 4 The reflection cut is formed by cutting out a straight line or a concave curve in a cross section perpendicular to the extending direction of the light guide portion. Any one of the items in (3) The vehicle lamp according to claim 1. [ 5 The reflecting portion is located on the opposite side of the inner reflecting surface across the plurality of reflection cuts, and includes an outer reflecting surface that is inclined in the opposite direction to the inner reflecting surface. 4 ] The vehicular lamp according to any one of the above items. [ 6 The outer reflective surface is formed so as to draw a straight line or a concave or convex curve in a cross section perpendicular to the extending direction of the light guiding section. 5 a vehicle lamp according to the 。 [Effects of the Invention]

[0008] As described above, according to the present invention, it is possible to provide a vehicle lamp that can improve the appearance of light emission by preventing uneven light emission when turned on. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a configuration of a vehicle lamp according to an embodiment of the present invention; [Figure 2] 2 is a cross-sectional view of the vehicle lamp taken along line AA shown in FIG. 1. [Figure 3] 2 is a cross-sectional view of the vehicle lamp taken along line BB shown in FIG. 1. [Figure 4] 2 is a cross-sectional view for explaining the cross-sectional shape of a light guide provided in the vehicle lamp shown in FIG. 1. FIG. [Figure 5] 5 is a cross-sectional view showing the optical path of light directed toward the boundary on the front side of the light guide shown in FIG. 4. [Figure 6]6 is a photograph showing a light source image of a light-emitting portion when the light guide shown in FIG. 5 is made to emit light. [Figure 7] 10 is a cross-sectional view showing the optical path of light directed toward the boundary on the front side of the light guide body of Comparative Example 1. FIG. [Figure 8] 8 is a photograph showing a light source image of a light-emitting portion when the light guide shown in FIG. 7 is made to emit light. [Figure 9] 10 is a cross-sectional view showing the optical path of light directed toward the boundary on the front side of the light guide body of Comparative Example 2. FIG. [Figure 10] 10 is a photograph showing a light source image of a light emitting portion when the light guide shown in FIG. 9 is made to emit light. [Figure 11] FIG. 1A is a cross-sectional view showing a modified example of the light guide, and FIG. 1B is an enlarged cross-sectional view of a boxed portion C shown in FIG. [Figure 12] FIG. 10 is a perspective view showing another example of the configuration of the light guide. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings used in the following description, the dimensions of the components may be shown at different scales to make them easier to see, and the dimensional ratios of the components may not necessarily be the same as in reality.

[0011] As one embodiment of the present invention, a vehicle lamp 1 shown in, for example, FIGS. 1 to 4 will be described. Fig. 1 is a perspective view showing the configuration of the vehicle lamp 1. Fig. 2 is a cross-sectional view of the vehicle lamp 1 taken along line AA shown in Fig. 1. Fig. 3 is a cross-sectional view of the vehicle lamp 1 taken along line BB shown in Fig. 1. Fig. 4 is a cross-sectional view for explaining the cross-sectional shape of a light guide 3 provided in the vehicle lamp 1.

[0012] In addition, in the drawings shown below, an XYZ Cartesian coordinate system is set up, with the X-axis direction being the front-to-rear direction of the vehicle lighting fixture 1, the Y-axis direction being the left-to-right direction of the vehicle lighting fixture 1, and the Z-axis direction being the up-to-down direction of the vehicle lighting fixture 1.

[0013] As shown in FIGS. 1 to 3, a vehicle lamp 1 of this embodiment includes a plurality of light sources 2 (two in this embodiment) and a light guide 3 that guides light L emitted from the plurality of light sources 2.

[0014] The plurality of light sources 2 are made up of, for example, LEDs, and are mounted on the same surface of a circuit board (not shown) on which a drive circuit for driving the LEDs is provided, and each emits light L radially in the same direction.

[0015] The light guide 3 is made of a light-transmitting material such as glass or a transparent resin such as polycarbonate or acrylic. The light guide 3 has a plurality of (two in this embodiment) incident sections 4 arranged opposite the plurality of light sources 2, respectively, through which the light L emitted from the plurality of light sources 2 enters the interior of the light guide 3, a plurality of (two in this embodiment) light guide sections 5 that guide the light L incident from the plurality of incident sections 4 in the same direction, a plurality of (two in this embodiment) reflecting sections 6 arranged on the back side (-X axis side) of the plurality of light guide sections 5, respectively, and reflecting the light L guided inside the light guide section 5 toward the front side (+X axis side) of the light guide section 5, and a plurality of (two in this embodiment) exit sections 7 arranged on the front side of the plurality of light guide sections 5, respectively, and emitting the light L reflected by the reflecting sections 6 to the outside.

[0016] The light guide 3 has a structure in which a plurality of rod-shaped light guide sections 5 extend in the same direction (the Y-axis direction in this embodiment) from the base end side facing each light source 2 toward the tip end side, and adjacent ones of these light guide sections 5 are connected to each other.

[0017] Furthermore, by connecting adjacent ones of the plurality of light guide sections 5, the light guide 3 has a rear-side boundary 3a between adjacent ones of the reflection sections 6 on the rear side, and a front-side boundary 3b between adjacent ones of the emission sections 7 on the front side.

[0018] The plurality of incident sections 4 are positioned on the base end side of each light guide section 5, and are configured with flat (planar) incident surfaces 4a facing the respective light sources 2.

[0019] The plurality of reflecting sections 6 are located on the back side of each light guiding section 5 and have a plurality of reflection cuts 6a arranged in the direction in which the light guiding section 5 extends (hereinafter referred to as the "extending direction"). The plurality of reflection cuts 6a are not particularly limited in shape, size, number, etc., as long as they reflect light L incident on the back side of the light guiding section 5 at an angle such that the light L is emitted (transmitted) from the front side of the light guiding section 5 to the outside.

[0020] In this embodiment, for example, the reflection cuts 6a are configured by cutting out the back surface of the light guiding unit 5 in the vertical direction and having a generally triangular cross section, and are arranged at equal intervals in the extension direction of the light guiding unit 5. Furthermore, each reflection cut 6a is formed by cutting out along a straight surface or a concavely curved surface in a cross section (vertical cross section) perpendicular to the extension direction of the light guiding unit 5. In this embodiment, each reflection cut 6a is formed by cutting out along a concavely curved surface that is curved like an arc on the back side of the light guiding unit 5 in the vertical direction.

[0021] On the other hand, the multiple reflection cuts 6a may be configured so that the spacing between adjacent ones of the multiple reflection cuts 6a gradually narrows from the base end side to the tip end side of the light-guiding section 5, in order to make the exit surface 7a, described later, emit light more uniformly.

[0022] The reflecting part 6 has an inner reflecting surface 6b which is inclined in opposite directions across the boundary 3a on the rear side, and an outer reflecting surface 6c which is located on the opposite side of the inner reflecting surface 6b across the multiple reflection cuts 6a and is inclined in the opposite direction to the inner reflecting surface 6b.

[0023] Inner reflective surface 6b forms a surface that is continuous in the extension direction of light guiding section 5, and is formed so as to describe a straight line in a cross section (vertical cross section) perpendicular to the extension direction of light guiding section 5. Inner reflective surface 6b is inclined at an angle that reflects a portion of light L reflected by reflection cut 6a toward boundary 3b on the front side.

[0024] The outer reflective surface 6c forms a continuous surface in the extension direction of the light guiding section 5, and is formed so as to describe a straight line or a concavely or convexly curved line in a cross section (vertical cross section) perpendicular to the extension direction of the light guiding section 5. In this embodiment, the outer reflective surface 6c is formed so as to describe a straight line in a cross section (vertical cross section) perpendicular to the extension direction of the light guiding section 5. Furthermore, the outer reflective surface 6c is inclined at an angle such that a portion of the light L reflected by the reflection cut 6a is reflected toward the exit surface 7a, which will be described later.

[0025] The vehicle lamp 1 of this embodiment may be configured to have a reflector facing the back surface (reflecting portion 6) of the light guide portion 5. In this configuration, the light L emitted to the outside from the back surface side of the light guide 3 is reflected by the reflector and made to enter the inside from the back surface side of the light guide 3 again, thereby improving the utilization efficiency of the light L.

[0026] The plurality of emission sections 7 are located on the front side of each light guide section 5 and have emission surfaces 7a that are continuous in the extension direction of the light guide section 5. In a cross section (vertical cross section) perpendicular to the extension direction of the light guide section 5, each emission surface 7a is configured as a convex curved surface that is curved in an arc shape across the front boundary 3b.

[0027] The light exit surface 7a may be provided with a plurality of diffusion cuts (not shown) for diffusing the light L emitted from the light exit surface 7a to the outside. Examples of the diffusion cuts include lens cuts called flute cuts or fisheye cuts, and uneven structures formed by knurling or embossing. By adjusting the shape of the diffusion cuts, it is possible to control the degree of diffusion of the light L emitted from the light exit surface 7a.

[0028] In the vehicle lamp 1 of this embodiment having the above-described configuration, light L emitted from each light source 2 enters the inside of each light guiding section 5 from each incident surface 4a (incident section 4). As a result, the light L that has entered the inside of each light guiding section 5 is guided toward the base end side of each light guiding section 5 while repeatedly reflecting inside each light guiding section 5.

[0029] Furthermore, in the vehicle lamp 1 of this embodiment, light L guided inside each light guiding section 5 is reflected by the plurality of reflection cuts 6a, inner reflection surfaces 6b, and outer reflection surfaces 6c (reflecting sections 6), and the light L reflected by the plurality of reflection cuts 6a, inner reflection surfaces 6b, and outer reflection surfaces 6c (reflecting sections 6) is emitted from the plurality of emission surfaces 7a (emitting sections 7) to the outside of the light guiding section 5. This makes it possible to cause the plurality of emission surfaces 7a (emitting sections 7) to emit light as light-emitting sections of the vehicle lamp 1.

[0030] In the vehicle lamp 1 of this embodiment, a portion of the light L reflected by the above-mentioned multiple reflection cuts 6a is incident on the inner reflection surface 6b, and is reflected from this inner reflection surface 6b toward the front boundary 3b.

[0031] As a result, in the vehicle lighting fixture 1 of this embodiment, it is possible to prevent dark areas (uneven light emission) from occurring between adjacent ones of the multiple exit surfaces 7a (exit portions 7) (near the boundary 3b on the front side).

[0032] Therefore, in the vehicle lamp 1 of this embodiment, the plurality of light emitting surfaces 7a (light emitting portion 7) can emit light more uniformly, and the appearance of the light emitting portion can be improved.

[0033] Furthermore, in the vehicle lamp 1 of this embodiment, even when the viewing angle from the front becomes large, the multiple exit surfaces 7a (exit portions 7) can emit light more uniformly, making it possible to view the light-emitting portions with the same brightness.

[0034] Here, the cross-sectional shape of light guide 3 preferably satisfies the relationships of the following formulas (1) to (3) when, in the vertical cross section shown in Figure 4, the outer spacing between adjacent light guide sections 5 is X, the center-to-center spacing between adjacent light guide sections 5 is Y, the distance between the centers of reflection cut 6a and exit surface 7a is Z, and the width of reflection cut 6a is A. X / 8≦Y <X / 2 …(1) X / 3≦Z≦3X / 4 …(2) 0 <A≦X / 2 …(3)

[0035] It is more preferable that the cross-sectional shape of the light guide 3 satisfies the relationships of the following formulas (1)' to (3)'. X / 4≦Y≦4X / 9 …(1)' X / 2≦Z≦2X / 3 …(2)' X / 15≦A≦X / 4 …(3)'

[0036] In the vehicle lamp 1 of this embodiment, by satisfying the relationships of the above formulas (1) to (3) (more preferably formulas (1)' to (3)'), it is possible to optimize the dimensions X, Y, Z, and A between adjacent light-guiding sections 5, and prevent the occurrence of dark areas (uneven light emission) between adjacent ones of the plurality of exit surfaces 7a (exit sections 7) (near the boundary 3b on the front side), while making the plurality of exit surfaces 7a (exit sections 7) emit light more uniformly.

[0037] FIG. 5 shows the cross-sectional shape of the light guide 3 that satisfies the relationships Y=2X / 5, Z=3X / 5, and A=X / 6 in the above formulas (1) to (3). FIG. 5 also shows the optical path of light L directed toward the boundary 3b on the front side of the light guide 3. A light source image of the light-emitting section when the light guide 3 shown in FIG. 5 is made to emit light was obtained by simulation. The light source image of the light-emitting section obtained as a result of the simulation is shown in FIG.

[0038] In the light guide 3 having the cross-sectional shape shown in Figure 5, as shown in Figure 6, it is possible to prevent dark areas (uneven light emission) from occurring between adjacent ones of the multiple exit surfaces 7a (exit sections 7) (near the boundary 3b on the front side), thereby improving the appearance of the light-emitting section.

[0039] On the other hand, as Comparative Example 1, a light source image of the light emitting portion when light guide 30A having the cross-sectional shape shown in Fig. 7 is caused to emit light was obtained by simulation. The light source image of the light emitting portion obtained by the simulation is shown in Fig. 8.

[0040] In the light guide 30A, the same reference numerals are used in the drawings to designate the same parts as those in the light guide 3. Fig. 7 also shows the optical path of light L directed toward the boundary 3b on the front side of the light guide 30A.

[0041] In the light guide 30A, the inner reflective surface 6b is formed so as to describe a concave curve that is curved in an arc shape.

[0042] In the light guide 30A having the cross-sectional shape shown in Figure 7, as shown in Figure 8, dark areas (uneven light emission) occur between adjacent ones of the multiple exit surfaces 7a (exit sections 7) (near the boundary 3b on the front side), making the light-emitting section look bad.

[0043] On the other hand, as Comparative Example 2, a light source image of the light emitting portion when light guide 30B having the cross-sectional shape shown in Fig. 9 is caused to emit light was obtained by simulation. The light source image of the light emitting portion obtained by the simulation is shown in Fig. 10.

[0044] In the light guide 30B, the same reference numerals are used in the drawings to designate the same parts as those in the light guide 3. Fig. 9 also shows the optical path of light L directed toward the boundary 3b on the front side of the light guide 30B.

[0045] In the light guide 30B, the inner reflective surface 6b is formed to describe a convex curve that is curved in an arc shape, and the outer reflective surface 6c is formed to describe a convex curve that is curved in an arc shape.

[0046] In the light guide 30B having the cross-sectional shape shown in Figure 9, as shown in Figure 10, dark areas (uneven light emission) occur between adjacent ones of the multiple exit surfaces 7a (exit sections 7) (near the boundary 3b on the front side), making the light-emitting section look bad.

[0047] The present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. Specifically, in the above-described vehicle lamp 1, the light guide 3 may have a shape as shown in, for example, Figures 11(A) and 11(B). Figure 11(A) is a cross-sectional view showing a modified example of the light guide 3. Figure 11(B) is an enlarged cross-sectional view of the enclosed portion C shown in Figure 11(A).

[0048] Specifically, in the light guide 3 shown in Figures 11(A) and (B), in a cross section (vertical cross section) perpendicular to the extension direction of the light guide section 5, the front side boundary 3b is formed so as to draw an arc-shaped concave curve between adjacent exit surfaces 7a.

[0049] In this case, the light L emitted from the front boundary 3b can be diffused, and the brightness near the front boundary 3b can be prevented from increasing, while allowing the light to be emitted more uniformly between adjacent ones of the multiple exit surfaces 7a (exit sections 7) (near the front boundary 3b).

[0050] Furthermore, the emission section 7 may be configured to have a diffusion section (not shown) for diffusing the light L emitted from the vicinity of the boundary 3b on the front side. The diffusion section may be a fine uneven structure formed by applying a graining process or a blasting (surface roughening) process to the vicinity of the boundary 3b on the front side.

[0051] In this case, too, by diffusing the light L emitted from the front boundary 3b using the diffusion section while preventing the brightness from increasing near the front boundary 3b, it is possible to emit light more uniformly between adjacent ones of the multiple exit surfaces 7a (exit sections 7) (near the front boundary 3b).

[0052] Furthermore, the above-described vehicle lamp 1 is not necessarily limited to the configuration of the light guide 3 described above, and it is also possible to use configurations of light guides 3A to 3D as shown in Figures 12(A) to 12(D). Figures 12(A) to 12(D) are perspective views showing other configuration examples of the light guides 3A to 3D.

[0053] Specifically, as shown in FIG. 12(A), the light guide 3A may have one incident portion 4 for one light source 2, and the light guide portion 5 extending from this incident portion 4 may be branched into two light guide portions 5 and connected together.

[0054] On the other hand, a light guide 3B shown in Figure 12(B) may have three incident portions 4 for three light sources 2, and three light guide portions 5 extending from each incident portion 4 may be connected to each other.

[0055] On the other hand, as in a light guide 3C shown in FIG. 12(C), two light guide sections 5 connected to each other may have asymmetrical cross-sectional shapes of outer reflecting surfaces 6c.

[0056] On the other hand, a light guide 3D shown in Figure 12(D) may have two incident portions 4 for two light sources 2, and two light guide portions 5 extending from each incident portion 4 may be connected midway.

[0057] Furthermore, in the vehicle lamp 1, the shape of the light guide 3 can be changed as appropriate to suit the design of the actual vehicle. For example, the light guide 3 may have a curved or inclined shape that is recessed more on the outside than on the inside in the vehicle width direction, in accordance with the slanted shape provided at the corners on the front or rear end of the vehicle.

[0058] The vehicle lighting fixtures to which the present invention can be applied are not particularly limited, and the present invention can be widely applied to, for example, taillights, position lamps, daytime running lights (DRLs), backup lamps, turn signal lamps, side marker lamps, etc.

[0059] Furthermore, the light source 2 may be any light source that radially emits light L, and may be a light emitting element such as a laser diode (LD) in addition to the LED described above. The color of the light emitted by the light source 2 may be changed appropriately depending on the application of the vehicle lamp, such as red light, white light, or orange light. [Explanation of symbols]

[0060] 1...Vehicle lamp 2...Light source 3,3A~3D...Light guide 3a...Back side boundary 3b...Front side boundary 4...Incidence part 4a...Incidence surface 5...Light guide part 6...Reflection part 6a...Reflection cut 6b...Inner reflection surface 6c...Outer reflection surface 7...Output part 7a...Output surface L...Light

Claims

1. A light source and a light guide that guides the light emitted from the light source, The light guide body includes a plurality of light guide portions extending in the same direction with adjacent light guide portions connected to each other; an incident portion disposed opposite the light source and configured to cause light emitted from the light source to enter the light guiding portion; a plurality of reflecting portions arranged on the rear side of the plurality of light guiding portions, respectively, and configured to reflect the light guided inside the light guiding portions toward the front side of the light guiding portions; a plurality of exit sections disposed on the front side of the plurality of light guide sections, each of which emits the light reflected by the reflecting section to the outside of the light guide section; the reflecting portion includes a plurality of reflection cuts arranged in a direction in which the light guiding portion extends, and inner reflection surfaces inclined in opposite directions across a boundary on the rear side between adjacent ones of the light guiding portions, The inner reflective surface is formed so as to describe a straight line in a cross section perpendicular to the direction in which the light-guiding section extends, and is inclined at an angle such that a portion of the light reflected by the reflection cut is reflected toward the front boundary located between adjacent light-guiding sections.

2. A light source and a light guide that guides the light emitted from the light source, The light guide body includes a plurality of light guide portions extending in the same direction with adjacent light guide portions connected to each other; an incident portion disposed opposite the light source and configured to cause light emitted from the light source to enter the light guiding portion; a plurality of reflecting portions arranged on the rear side of the plurality of light guiding portions, respectively, and configured to reflect the light guided inside the light guiding portions toward the front side of the light guiding portions; a plurality of exit sections disposed on the front side of the plurality of light guide sections, each of which emits the light reflected by the reflecting section to the outside of the light guide section; the reflecting portion includes a plurality of reflection cuts arranged in a direction in which the light guiding portion extends, and inner reflection surfaces inclined in opposite directions across a boundary on the rear side between adjacent ones of the light guiding portions, the inner reflective surface is formed so as to describe a straight line in a cross section in a direction perpendicular to a direction in which the light guiding section extends, the light exit portion includes a light exit surface that is continuous in a direction in which the light guide portion extends, the light exit surface is formed so as to describe a convex curve across a front boundary between adjacent ones of the light guiding sections in a cross section perpendicular to a direction in which the light guiding sections extend, The front boundary is formed so as to form a concave curve between adjacent exit surfaces in a cross section perpendicular to the direction in which the light-guiding section extends.

3. 3. The vehicle lamp according to claim 2, wherein the light exiting portion has a diffusing portion that diffuses light that is emitted from the vicinity of the boundary on the front side.

4. The vehicular lamp according to any one of claims 1 to 3, characterized in that the reflection cut is formed by cutting out along a straight surface or a concave curved surface in a cross section perpendicular to the direction in which the light guiding section extends.

5. The vehicular lamp according to any one of claims 1 to 4, characterized in that the reflective portion includes an outer reflective surface located on the opposite side of the inner reflective surface across the plurality of reflective cuts and inclined in the opposite direction to the inner reflective surface.

6. 6. The vehicle lamp according to claim 5, wherein the outer reflective surface is formed so as to describe a straight line or a concave or convex curve in a cross section perpendicular to the direction in which the light-guiding portion extends.

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