Vehicle headlamp

Abstract

A vehicle headlamp is provided with: a plurality of light sources arranged in the left-right direction; a light source-side lens disposed in front of the plurality of light sources and emitting light forward; and a projection lens that is disposed in front of the light source-side lens and that irradiates the light irradiated from the light source-side lens toward the front of the vehicle, the light source-side lens having an incident surface on which the light from the plurality of light sources is incident, at least one groove portion extending in the vertical direction being disposed on the incident surface at a position offset from the optical axis of the projection lens in the left-right direction, the groove portion has an inclined portion that refracts light from the plurality of light sources toward the optical axis side.

Description

Technical Field

[0001] This invention relates to headlights for vehicles. Background Technology

[0002] There are known vehicle headlights that individually control the illumination status of multiple light sources, such as LEDs, to form an ADB beam pattern in front of the vehicle.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-98105 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the vehicle headlight described in Patent Document 1, when light from multiple light sources is incident on a position that is left-right away from the center of the projection lens, blurring may occur in the illumination pattern illuminated by the projection lens.

[0008] The present invention was made in view of the above circumstances, and its object is to provide a vehicle headlight capable of suppressing blurring of the illumination pattern.

[0009] Solution for solving the problem

[0010] The vehicle headlight of the present invention comprises: a plurality of light sources arranged in a left-right direction; a light source side lens disposed in front of the plurality of light sources and emitting light forward; and a projection lens disposed in front of the light source side lens and irradiating the light irradiated by the light source side lens forward of the vehicle. The light source side lens has an incident surface on which light from the plurality of light sources is incident. On the incident surface, at least one groove extending in a vertical direction is disposed at a position offset from the optical axis of the projection lens in the left-right direction. The groove has an inclined portion that refracts light from the plurality of light sources toward the optical axis side.

[0011] Invention Effects

[0012] According to the present invention, a vehicle headlight capable of suppressing blurring of the illumination pattern is provided. Attached Figure Description

[0013] Figure 1 This is a perspective view showing an example of a vehicle headlight according to this embodiment.

[0014] Figure 2 This is a diagram showing an example of a lens on the light source side.

[0015] Figure 3This is a diagram showing an example of a lens on the light source side.

[0016] Figure 4 This is a diagram showing an example of a lens on the light source side.

[0017] Figure 5 This is a diagram showing an example of a lens on the light source side.

[0018] Figure 6 This is a diagram showing an example of a lens on the light source side.

[0019] Figure 7 This is a diagram showing an example of a lens on the light source side.

[0020] Figure 8 This is a diagram illustrating an example of a vehicle using its headlights.

[0021] Figure 9 This is a diagram illustrating an example of a vehicle using its headlights.

[0022] Figure 10 This is a diagram illustrating an example of a vehicle using its headlights.

[0023] Figure 11 This is an example diagram showing the ADB pattern for vehicle headlights. Detailed Implementation

[0024] Hereinafter, embodiments of the vehicle headlight of the present invention will be described based on the accompanying drawings. However, the present invention is not limited to these embodiments. Furthermore, the structural elements in the following embodiments include elements that can and are easily substituted by those skilled in the art, or elements that are substantially the same.

[0025] In the following description, the directions of front-back, up-down, and left-right refer to the directions when the vehicle headlights are mounted on the vehicle, indicating the direction of travel when viewed from the driver's seat. Furthermore, in this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is horizontal. Additionally, in this embodiment, the directions of the front and rear sides refer to the directions when mounted on the vehicle (vehicle-mounted state). For example, when mounted on the front of the vehicle, the front is the front direction (front side), and the rear is the rear direction (rear side).

[0026] Figure 1 This is a perspective view showing an example of a vehicle headlight 100 according to this embodiment. Figure 1As shown, the vehicle headlight 100 includes multiple light sources 10, light source-side lenses 20, and projection lenses 30. The vehicle headlight 100 forms an ADB beam pattern in front of the vehicle by individually controlling the illumination and extinguishing of the multiple light sources 10. The vehicle headlights 100 are positioned on the left and right sides of the front of the vehicle. In this embodiment, the vehicle headlight 100 positioned on the right side of the vehicle will be described as an example. Furthermore, the vehicle headlight positioned on the left side of the vehicle may have a structure that is symmetrical to the vehicle headlight 100 of this embodiment.

[0027] The multiple light sources 10 are, for example, semiconductor devices such as LEDs (Light Emitting Diodes). The multiple light sources 10 are arranged in a left-right direction. In this embodiment, for example, twelve light sources 10 are arranged in the left-right direction. The left-right spacing of the multiple light sources 10 is not particularly limited; for example, they can all be the same, they can all be different, or at least two can have the same spacing.

[0028] One of the multiple light sources 10 is positioned on the optical axis AX of the projection lens 30. The spacing between adjacent light sources 10 in the left-right direction can vary depending on the light source 10. Furthermore, the number of light sources 10 positioned on the left side of the optical axis AX is greater than the number of light sources 10 positioned on the right side of the optical axis AX. The emitting surfaces 11 of the multiple light sources 10 face forward of the vehicle. The multiple light sources 10 are mounted on a substrate (not shown) with wiring and the like. This substrate is supported by support members such as a heat sink.

[0029] The light source side lens 20 is positioned in front of the plurality of light sources 10. Figures 2 to 7 This is a diagram showing an example of a light source-side lens 20. Figure 2 This is a view taken from a diagonal front. Figure 3 This is a view from above. Figure 4 This is a view taken from the rear. Figure 5 It means along Figure 4 A diagram of the structure of section AA. Figure 6 It is an enlarged representation Figure 3 A diagram showing the structure on the left side of the optical axis AX of the projection lens 30. Figure 7 It is an enlarged representation Figure 3 A diagram showing the structure on the right side of the optical axis AX of the projection lens 30. (See diagram for reference.) Figures 1 to 7 As shown, the light source side lens 20 has an incident surface 21 and an exit surface 22.

[0030] The incident surface 21 receives light from multiple light sources 10. The incident surface 21, in longitudinal section view (refer to...) Figure 5 It bends in a way that the central part protrudes towards the light source 10 in the vertical direction.

[0031] The incident surface 21 has a groove 24. The groove 24 is disposed at a position offset from the optical axis AX of the projection lens 30 in the left-right direction. In this embodiment, multiple grooves 24 are disposed, for example, four are disposed on the inner side (left side) of the vehicle in the left-right direction relative to the optical axis AX, and two are disposed on the outer side (right side) of the vehicle. That is, the number of grooves 24 is greater on the inner side of the vehicle in the left-right direction relative to the optical axis AX than on the outer side of the vehicle in the left-right direction relative to the optical axis AX. In this embodiment, the headlight 100 for the vehicle is disposed on the right side of the vehicle, and the number of light sources 10 disposed on the inner side of the vehicle (left side) relative to the optical axis AX is greater than the number of light sources 10 disposed on the outer side of the vehicle (right side) relative to the optical axis AX. Therefore, corresponding to this structure, the number of grooves 24 is greater on the left side of the optical axis AX than on the right side of the optical axis AX. In this way, it is possible to configure the number of grooves 24 disposed on the left side of the optical axis AX to be different from the number of grooves 24 disposed on the right side of the optical axis AX.

[0032] Furthermore, the groove 24 can be a single unit. In this embodiment, the groove 24 is disposed on both the left and right sides of the optical axis AX, but this configuration is not limited to this structure. For example, it is also possible to have the groove 24 disposed only on one side of the optical axis AX. Additionally, for example, the groove 24 may not be disposed on the outer (right) side of the vehicle in the left-right direction relative to the optical axis AX.

[0033] Multiple slots 24 are arranged with gaps in the left-right direction. The slots 24 extend in the vertical direction. The width of the slots 24 is approximately uniform in the vertical direction. The widths of the multiple slots 24 in the left-right direction may also differ from each other.

[0034] Each groove 24 has a depth that gradually increases from the left and right sides to the center when viewed from above (see reference). Figure 3 The groove 24 is formed in a V shape. It has an inclined portion 25 and a connecting portion 26. The inclined portion 25 and the connecting portion 26 are, for example, straight in cross-section and are inclined relative to a plane perpendicular to the optical axis AX. In one groove 24, the inclined portion 25 is located on one side in the left-right direction, and the connecting portion 26 is located on the other side in the left-right direction.

[0035] The inclined portion 25 is formed to refract light from the plurality of light sources 10 toward the optical axis AX. For example, the slot 24, except for the slot 24 located at the left end in the left-right direction, which is arranged on the left side relative to the optical axis AX, is formed with the inclined portion 25 tilting to the right and forward. Additionally, the slot 24 located at the left end in the left-right direction is formed with the inclined portion 25 tilting to the left and forward. Hereinafter, when distinguishing the inclined portion 25, the inclined portion 25 of the slot 24 located on the left side relative to the optical axis AX, which is located at the left end in the left-right direction, will be labeled as inclined portion 25b, and the inclined portions 25 of the other slot 24 will be labeled as inclined portion 25a (see reference). Figure 6 wait).

[0036] Furthermore, the groove 24 located on the right relative to the optical axis AX is formed with an inclined portion 25 tilting to the left and forward. However, the groove 24 located at the right end in the left-right direction is formed with an inclined portion 25 tilting to the right and forward. Hereinafter, when distinguishing the inclined portions 25, in the groove 24 located on the right relative to the optical axis AX, the inclined portion 25 of the groove 24 located at the right end in the left-right direction will be labeled as inclined portion 25d, and the inclined portions 25 of the other groove 24 will be labeled as inclined portion 25c (see reference). Figure 7 wait).

[0037] In one groove 24, the inclined portion 25 and the connecting portion 26 each have a shape with rounded corners at their boundary portions with the incident surface 21. Furthermore, the boundary portions of the inclined portion 25 and the connecting portion 26 also have rounded corners.

[0038] When viewed along the optical axis AX, each slot 24 is configured to leave at least a portion of the incident surface 21 empty of the portion opposite to each light source 10. In other words, when viewed along the optical axis, at least a portion of the plurality of light sources 10 is positioned opposite the incident surface 21 between adjacent slots 24 in the left-right direction. Furthermore, when viewed along the optical axis, each slot 24 is configured with an inclined portion 25 positioned between adjacent light sources 10 in the left-right direction.

[0039] The exit surface 22 emits light incident from the incident surface 21. For example... Figure 3 As shown, the emission surface 22 has a central portion 22a disposed in the center in the left-right direction and curved portions 22b disposed on both sides in the left-right direction. The optical axis AX passes through the central portion 22a. The central portion 22a is, for example, cylindrical, and its front end is straight when viewed from above.

[0040] The curved portion 22b is formed to bend towards the rear side from the central portion 22a to both ends in the left-right direction. The aforementioned groove portion 24 can, for example, be positioned at the portion corresponding to the curved portion 22b when viewed along the optical axis AX. Furthermore, the ejection surface 22 is formed such that, in longitudinal section view (refer to...) Figure 5 It bends from the center in the vertical direction to the two sides in the vertical direction towards the back side. As a whole, the central part 22a and the left and right curved parts 22b are stepless and have continuous tangents and continuous curvature.

[0041] In this embodiment, compared to the right side of the optical axis AX of the projection lens 30, the left-side light source 10 is configured to cover a wider area in the left-right direction. Therefore, corresponding to the configuration of this light source 10, the right-side curved portion 22b is a shape obtained by cutting off a portion of the right end of the shape that makes the left-side curved portion 22b symmetrical. Thus, the left-side curved portion 22b is configured to cover a wider area than the right-side curved portion 22b. Furthermore, the left and right curved portions 22b are respectively curved with equal curvature from the central portion 22a towards the left and right in the left-right direction.

[0042] A mounting portion 23 is provided on the light source side lens 20. The mounting portion 23 is disposed on both sides of the light source side lens 20 in the left-right direction. The mounting portion 23 is mounted, for example, via a fixing component not shown, such as a screw.

[0043] A projection lens 30 is positioned in front of the light source-side lens 20. The projection lens 30 is held by a holding part (not shown). The projection lens 30 has an incident surface 31 and an exit surface 32. The incident surface 31 receives light from the light source-side lens 20. The exit surface 32 emits the light incident from the incident surface 31 toward the front of the vehicle, forming an ADB pattern.

[0044] Next, the operation of the vehicle headlight 100 configured as described above will be explained. Figures 8 to 10 This is a diagram illustrating an example of the operation of a vehicle's headlights 100. Figure 9 and Figure 10 Will Figure 8 A portion is enlarged and represented. Furthermore, Figure 9 and Figure 10 This refers to a structure along a cross section parallel to the horizontal plane.

[0045] By illuminating multiple light sources 10 of the vehicle's headlight 100, light is emitted from the light-emitting surface 11. For example... Figure 8As shown, light L1 from one of the multiple light sources 10, positioned within a range corresponding to the central portion 22a of the emission surface 22 when viewed along the optical axis AX, enters the light source-side lens 20 from the incident surface 21 and exits forward from the emission surface 22. This light L1 enters from the incident surface 31 of the projection lens 30, exits from the emission surface 32, and forms at least a portion of the ADB pattern in front of the vehicle.

[0046] In addition, such as Figure 8 As shown, a portion of the light L2 from one of the multiple light sources 10, located in the region corresponding to the curved portion 22b on the left side of the emission surface 22, enters through the incident surface 21 between the slot portions 24 arranged in the left-right direction, and a portion of the light L3 enters through the inclined portion 25a of the slot portion 24. Additionally, for example, a portion of the light L4 emitted from the light source 10 located at the left end enters through the inclined portion 25b of the slot portion 24, and a portion of the light L5 enters through the incident surface 21 (hereinafter referred to as the left end 21a of the incident surface 21) located to the left of the slot portion 24 at the left end.

[0047] Light L2 incident from the incident surface 21 exits, for example, from the central portion 22a of the exit surface 22 and reaches the incident surface 31 of the projection lens 30.

[0048] Light L3 incident from the inclined portion 25a of the groove 24 is refracted by the inclined portion 25a toward the optical axis AX and exits from the center portion 22a or the curved portion 22b of the exit surface 22. This light L3 is different from the light L3a without the inclined portion 25a (in... Figure 8 and Figure 9 Compared to (represented by a single-dot dash), it reaches the optical axis AX side, which is closer to the incident surface 31 of the projection lens 30.

[0049] Light L4 incident from the inclined portion 25b of the groove 24 is refracted by the inclined portion 25b toward the optical axis AX and exits from the curved portion 22b of the exit surface 22. This light L4 differs from light L4a without the inclined portion 25b (in... Figure 8 and Figure 9 Compared to (represented by a single-dot dash), it refracts at a smaller angle to the optical axis AX and reaches the optical axis AX side of the incident surface 31 closer to the projection lens 30.

[0050] Light L5 incident from the left end 21a of the incident surface 21 is refracted from the bend 22b of the exit surface 22 toward the optical axis AX and reaches the incident surface 31 of the projection lens 30. Without the bend 22b, light L5a incident from the left end of the incident surface 21 (in...) Figure 8 and Figure 9(Indicated by a single-dotted line) Light emitted from the side of the light source-side lens 20 does not reach the projection lens 30. In contrast, by forming a bend 22b, light L5 incident from the incident surface 21 at the left end is refracted by the bend 22b of the exit surface 22 towards the optical axis AX and is emitted, thus reaching the incident surface 31 of the projection lens 30. Therefore, the light utilization efficiency is increased.

[0051] In addition, such as Figure 8 as well as Figure 9 As shown, a portion of the light L6 from one of the multiple light sources 10, located in the region corresponding to the curved portion 22b to the right of the emission surface 22, is incident from the incident surface 21 between the slot portions 24 arranged in the left-right direction. Additionally, a portion of the light L7 is incident from the inclined portion 25c of the slot portion 24. Furthermore, for example, a portion of the light L8 emitted from the light source 10 located at the left end is incident from the inclined portion 25d of the slot portion 24, and a portion of the light L9 is incident from the incident surface 21 (hereinafter referred to as the right end portion 21b of the incident surface 21), located to the right of the slot portion 24 located at the right end.

[0052] Light L6 incident from the incident surface 21 exits, for example, from the central portion 22a of the exit surface 22 and reaches the incident surface 31 of the projection lens 30.

[0053] Light L7 incident from the inclined portion 25b of the groove 24 is refracted towards the optical axis AX by the inclined portion 25c and exits from the center portion 22a or the curved portion 22b of the exit surface 22. This light L7 differs from light L7a without the inclined portion 25c (in... Figure 8 and Figure 10 Compared to (represented by a single-dot dash), it reaches the optical axis AX side, which is closer to the incident surface 31 of the projection lens 30.

[0054] Light L8 incident from the inclined portion 25d of the groove 24 is refracted by the inclined portion 25d toward the optical axis AX and exits from the curved portion 22b of the exit surface 22. This light L8 differs from light L8a without the inclined portion 25d (in... Figure 8 and Figure 10 Compared to (represented by a single-dot dash), it refracts at a smaller angle to the optical axis AX and reaches the optical axis AX side of the incident surface 31 closer to the projection lens 30.

[0055] Light L9 incident from the right end 21b of the incident surface 21 is refracted from the bend 22b of the exit surface 22 toward the optical axis AX and reaches the incident surface 31 of the projection lens 30. Without the bend 22b, light L9a incident from the right end of the incident surface 21 (in...) Figure 8 and Figure 10(Indicated by a single-dotted line) Light emitted from the side of the light source-side lens 20 does not reach the projection lens 30. In contrast, by forming a bend 22b, light L9 incident from the incident surface 21 at the right end is refracted by the bend 22b of the exit surface 22 towards the optical axis AX and emitted, thus reaching the incident surface 31 of the projection lens 30. Therefore, the light utilization efficiency is increased.

[0056] Figure 11 This is an example diagram showing the ADB pattern for vehicle headlights. Figure 11 In the diagram, HH lines represent horizontal lines, and VV lines represent lines parallel to the vertical direction (hereinafter referred to as vertical lines). As described above, light rays L1 to L9 arriving at the incident surface 31 enter from the incident surface 31, exit from the exit surface 32, and form an ADB pattern P in front of the vehicle. Figure 11 As shown, the ADB pattern P is arranged such that the patterns P1 to P12 corresponding to the light source 10 partially overlap and are arranged in the left-right direction. The central region PA of the ADB pattern P is formed by the central region 20A of the light source-side lens 20 (refer to...). Figure 11 The left region PB of the ADB pattern P is formed by the left region 20B of the light source-side lens 20 (refer to...). Figure 11 The right region PC of the ADB pattern P is formed by the right region 20C of the light source-side lens 20 (refer to...). Figure 11 )form.

[0057] As described above, the vehicle headlight 100 of this embodiment includes a plurality of light sources 10 arranged in the left-right direction, a light source side lens 20 arranged in front of the plurality of light sources 10 and emitting light forward, and a projection lens 30 arranged in front of the light source side lens 20 and irradiating the light irradiated from the light source side lens 20 in front of the vehicle. The light source side lens 20 has an incident surface 21 for light from the plurality of light sources 10 to be incident on. On the incident surface 21, at least one groove 24 extending in the vertical direction is arranged at a position offset from the optical axis AX of the projection lens 30 in the left-right direction. The groove 24 has an inclined portion 25 that refracts the light from the plurality of light sources 10 toward the optical axis AX side.

[0058] According to this structure, when light from multiple light sources 10 is incident on the incident surface 21 of the light source-side lens 20 at a position that is away from the optical axis AX of the projection lens 30 in the left-right direction, a portion of the light is refracted by the inclined portion 25 of the groove 24 towards the optical axis AX side. Therefore, compared to a structure without the groove 24 and the inclined portion 25, the light emitted from the light source-side lens 20 can reach a position closer to the optical axis AX of the projection lens 30. In this way, an illumination pattern can be formed near the optical axis AX in the left-right direction within the projection lens 30, thus enabling the use of the peripheral portion where aberrations are significant to be suppressed while forming the illumination pattern. As a result, blurring of the illumination pattern can be suppressed. For example, by reducing the curvature of the exit surface 32 of the projection lens 30, the use of the peripheral portion where aberrations are significant can be suppressed, thus suppressing blurring in an illumination pattern formed at a position away from the center in the left-right direction.

[0059] In the vehicle headlight 100 of this embodiment, when viewed from the optical axis direction along the optical axis AX, the slot 24 is configured to leave at least a portion of the incident surface 21 that is opposite to each light source 10 empty. According to this structure, by arranging the incident surface 21 in at least a portion of the portion opposite to each light source 10, light traveling forward from the light source 10 and incident on the incident surface 21 can reach a predetermined portion of the incident surface 31 of the projection lens 30. Therefore, blurring of the illumination pattern can be reliably suppressed.

[0060] In the vehicle headlight 100 of this embodiment, when viewed from the optical axis direction along the optical axis AX, the slot 24 is configured such that the inclined portion 25 is located between adjacent light sources 10 in the left-right direction. According to this structure, the inclined portion 25 can reliably refract light from the light source 10 in the left-right oblique direction toward the optical axis AX side.

[0061] In the vehicle headlight 100 of this embodiment, multiple slots 24 are arranged with spacing in the left-right direction. According to this structure, by refracting light through the multiple slots 24, light emitted from the light source-side lens 20 can reach the optical axis AX side of the projection lens 30.

[0062] In the vehicle headlight 100 of this embodiment, the groove 24 is disposed on both the left and right sides of the optical axis AX. According to this structure, by using the groove 24 to refract light on both the left and right sides of the optical axis AX that reach the incident surface 21, the light emitted from the light source side lens 20 can reach the optical axis AX side of the projection lens 30 more reliably.

[0063] In the vehicle headlight 100 of this embodiment, multiple slots 24 are arranged on the outer side of the vehicle in the left-right direction relative to the optical axis AX. According to this structure, by using the slots 24 to refract light reaching the outer side of the vehicle in the left-right direction relative to the optical axis AX in the incident surface 21, the light emitted from the light source side lens 20 can reach the optical axis AX side of the projection lens 30 more reliably.

[0064] In the vehicle headlight 100 of this embodiment, the number of slots 24 disposed on the left side of the optical axis AX is different from the number of slots 24 disposed on the right side of the optical axis AX. According to this structure, for example, the number of slots 24 disposed on the left and right sides of the optical axis AX can be flexibly set according to conditions such as whether the vehicle headlight 100 is disposed on the left or right side of the vehicle.

[0065] In the vehicle headlight 100 of this embodiment, the light source side lens 20 has an emission surface 22 from which light incident on the incident surface 21 is emitted. The emission surface 22 has curved portions 22b that bend towards the rear side from the central portion 22a passing through the optical axis AX to both ends in the left-right direction. With this structure, light reaching both sides of the emission surface 22 in the left-right direction can be emitted while being refracted towards the optical axis AX by the curved portions 22b. Therefore, compared to a structure without curved portions 22b, more light reaching the emission surface 22 can reach the projection lens 30. This improves light utilization efficiency.

[0066] In the vehicle headlight 100 of this embodiment, when viewed from the optical axis direction along the optical axis AX, the groove 24 is disposed in the portion overlapping with the curved portion 22b. According to this structure, the curved portion 22b can be used to bend the light refracted by the groove 24 on the incident surface 21 side and reaching the curved portion 22b towards the optical axis AX side, thus enabling the light to reach the vicinity of the optical axis AX of the projection lens 30 more reliably.

[0067] The technical scope of the present invention is not limited to the above-described embodiments, and appropriate modifications can be made without departing from the spirit of the present invention.

[0068] Symbol Explanation

[0069] AX—Optical axis, 10—Light source, 11—Emitting surface, 20—Light source side lens, 21, 31—Incident surface, 21a—Left end, 21b—Right end, 22, 32—Emitting surface, 22a—Central part, 22b—Bent part, 23—Mounting part, 24—Gutter, 25, 25a, 25b, 25c, 25d—Inclined part, 26—Connecting part, 30—Projection lens, 100—Vehicle headlight.

Claims

1. A vehicle headlight, characterized in that, have: Multiple light sources are arranged along the left-right direction; A light source-side lens is disposed in front of the plurality of light sources and emits light forward; as well as A projection lens is positioned in front of the light source-side lens and directs the light emitted from the light source-side lens toward the front of the vehicle. The light source-side lens has an incident surface for light from the plurality of light sources. On the incident surface, at least one groove extending in the vertical direction is disposed at a position offset from the optical axis of the projection lens in the left-right direction. The groove has an inclined portion that refracts light from the plurality of light sources toward the optical axis.

2. The vehicle headlight according to claim 1, characterized in that, When viewed from the direction of the optical axis, the slot is configured to leave at least a portion of the portion of the incident surface opposite to each of the light sources empty.

3. The vehicle headlight according to claim 2, characterized in that, When viewed from the direction of the optical axis, the groove is configured such that the inclined portion is located between adjacent light sources in the left-right direction.

4. The vehicle headlight according to claim 2, characterized in that, The grooves are arranged with gaps in the left and right directions.

5. The vehicle headlight according to claim 4, characterized in that, The grooves are located on the left and right sides of the optical axis.

6. The vehicle headlight according to claim 4, characterized in that, Multiple slots are arranged on the outer side of the vehicle in the left-right direction relative to the optical axis.

7. The vehicle headlight according to claim 6, characterized in that, The number of slots located on the left side of the optical axis is different from the number of slots located on the right side of the optical axis.

8. The vehicle headlight according to claim 1, characterized in that, The light source-side lens has an exit surface from which light incident on the incident surface exits. The ejection surface has a curved portion that bends from the central portion through which the optical axis passes to both ends in the left-right direction toward the back side.

9. The vehicle headlight according to claim 8, characterized in that, When viewed from the direction of the optical axis, the groove is positioned at the portion that overlaps with the curved portion.

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