JP7268339B2 - Vehicle light guide, light source unit, and vehicle headlamp - Google Patents

Description

The present invention relates to a vehicle light guide, a light source unit, and a vehicle headlamp.

In recent years, there has been known a structure in which functions corresponding to a reflector, a shade, a projection lens, and the like are integrated into one vehicle light guide (for example, see Patent Document 1). In other words, such a light guide for a vehicle includes an incident portion for receiving light from a light source, an internal reflecting portion (corresponding to a reflector) for internally reflecting the incident light, and a portion of the internally reflected light. and an emitting portion (corresponding to the projection lens) that emits the light that is internally reflected and passes through the shielding portion to illuminate the headlamp pattern in front of the vehicle.

Japanese Patent Application Laid-Open No. 2018-060808

Vehicle headlamps using the vehicle light guide described above are required to have a configuration that suppresses dazzling of oncoming vehicles.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle light guide, a light source unit, and a vehicle headlamp capable of suppressing dazzling of oncoming vehicles.

A light guide for a vehicle according to the present invention includes an incident portion for incident light from a light source, a reflecting portion for internally reflecting the light incident from the incident portion, and part of the light reflected by the reflecting portion. a light shielding part that shields the light from the light shielding part, an emitting part that emits the light that has been internally reflected by the reflecting part and has passed through the light shielding part to irradiate a headlamp pattern in front of the vehicle, and a light passing through the light shielding part and a course changing section that changes a course of a part of the light emitted from the emitting section to a predetermined area of the headlight pattern in a direction in which the predetermined area is not irradiated.

Further, in the vehicle light guide described above, the path changing portion may be arranged near the light shielding portion.

In the vehicle light guide, a plurality of the path changing portions may be arranged in a line in a straight line direction of an imaginary straight line parallel to the optical axis of the reflecting portion.

Further, in the vehicle light guide described above, the plurality of route changing portions include a first route changing portion arranged on the incident portion side with respect to the light shielding portion, and a first route changing portion arranged on the incident portion side with respect to the light shielding portion. and a second diverting section located in the .

In the vehicle light guide described above, the first path changing portion may have an internal reflecting surface that internally reflects the light from the reflecting portion in a direction away from the emitting portion.

In the vehicle light guide described above, the second path changing portion may have a refracting surface that refracts the light from the reflecting portion toward the outside of the light guide.

Further, in the vehicle light guide described above, the second path changing portion has an external reflection surface that reflects the light refracted toward the outside of the light guide by the refracting surface outside the light guide. may

Further, in the vehicle light guide described above, the path changing portion automatically moves toward a horizontal reference position in the headlamp pattern, which is one of the left side and the right side of the vehicle-mounted state, relative to the optical axis passing through the light source. It may be arranged on the side of the running line of the vehicle.

A light source unit according to the present invention includes a light source, and the vehicle light guide described above that guides and emits light from the light source to illuminate a headlamp pattern in front of the vehicle.

A vehicle headlamp according to the present invention includes the light source unit described above.

ADVANTAGE OF THE INVENTION According to this invention, the light guide for vehicles, the light source unit, and the headlamp for vehicles which can suppress the blinding of an oncoming vehicle can be provided.

FIG. 1 is a perspective view showing an example of a vehicle headlamp. FIG. 2 is a cross-sectional view showing an example of a vehicle light guide. 3 is an enlarged view of a part of the vehicle light guide shown in FIG. 2. FIG. FIG. 4 is a diagram showing an example of the vehicle light guide of FIG. 3 when viewed from direction A. FIG. FIG. 5 is a diagram showing an example of an optical path of light reflected by an internal reflecting surface. FIG. 6 is a diagram showing an example of a headlamp pattern that illuminates forward of the vehicle. FIG. 7 is a diagram showing another example of the vehicle light guide. FIG. 8 is a diagram showing another example of the headlamp pattern that illuminates the front of the vehicle.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the light guide for vehicles which concerns on this invention, a light source unit, and a vehicle headlamp is described based on drawing. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same. In the following description, front and rear, up and down, and left and right directions are the directions in which the vehicle headlamp is mounted in the vehicle, and the directions when viewed from the driver's seat in the traveling direction of the vehicle. . In this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is the horizontal direction.

FIG. 1 is a perspective view showing an example of a vehicle headlamp 100. FIG. The vehicle headlamp 100 shown in FIG. 1 emits a headlamp pattern P1 (see FIG. 6), which will be described later, in front of the vehicle. In this embodiment, for example, a low beam pattern will be described as an example of the headlamp pattern P1. The vehicle headlamp 100 includes a light source unit U. As shown in FIG. The light source unit U includes a light source 10 and a vehicle light guide 20 . In addition to the light source unit U, the vehicle headlamp 100 may further include another light source unit having a light source, a reflector, a shade, a projection lens, and the like. Further, the vehicle headlamp 100 may have a configuration in which a plurality of light source units U are provided. Hereinafter, in the present embodiment, the configuration of the vehicle headlamp 100 mounted on a vehicle traveling on a right-hand traffic road will be described as an example.

[light source]
A semiconductor light source, for example, is used as the light source 10 . Examples of such semiconductor light sources include LEDs, OELs, and OLEDs (organic EL). The light source 10 has a light emitting surface 11 that emits light so as to form a Lambertian distribution. The light emitting surface 11 is arranged to face an incident portion 21 of a vehicle light guide 20 which will be described later. The light emitting surface 11 is placed facing the vehicle light guide 20 . In this embodiment, a plurality of, for example, three, light sources 10 are arranged in the horizontal direction. The number of light sources 10 is not limited to three, and may be two or less, or may be four or more.

[Vehicle light guide]
FIG. 2 is a cross-sectional view showing an example of a vehicle light guide. The vehicular light guide 20 guides the light from the light source 10 and emits it forward when mounted on the vehicle. The vehicular light guide 20 according to this embodiment has a configuration in which functions corresponding to a reflector, a shade, a projection lens, and the like in a conventional projector-type vehicular headlamp are integrated, for example. As shown in FIGS. 1 and 2 , the vehicle light guide 20 includes an incident portion 21 , a reflecting portion 22 , a light shielding portion 23 , an emitting portion 24 and a path changing portion 25 .

[Incident part]
The incident part 21 is provided for each light source 10 . The incident portion 21 has a first incident surface 21a, a second incident surface 21b, and an incident side reflecting surface 21c. Light from the light source 10 is incident on the first incident surface 21a and the second incident surface 21b. The first incident surface 21 a faces the light emitting surface 11 . The first incident surface 21a is a convex surface protruding toward the light source 10 side. The second entrance surface 21b is arranged on the side of the light source 10 and arranged in a cylindrical surface so as to surround the light emitting surface 11 of the light source 10 and the first entrance surface 21a. The incident-side reflecting surface 21 c reflects the light incident from the second incident surface 21 b toward the reflecting section 22 .

[Reflection part]
The reflecting portion 22 internally reflects the light incident on the incident portion 21 toward the emitting portion 24 . The reflecting section 22 is arranged above the incident section 21 . The reflecting portion 22 has an internal reflecting surface 22a. The internal reflective surface 22 a reflects the light from the entrance section 21 toward the exit section 24 . The internal reflection surface 22a is, for example, a free-form surface. The internal reflection surface 22a has a first focus (not shown), a second focus, and an optical axis AX connecting the first focus and the second focus. The first focal point is located at or near the center of the light emitting surface 11 of the light source 10 . The second focal point is arranged at a position that overlaps the focal point of the emission section 24, which will be described later.

[Light shielding part]
The light blocking portion 23 blocks part of the light internally reflected by the reflecting portion 22 . For example, as shown in FIG. 2, the light shielding portion 23 is formed so that a corner portion 20c is formed by a surface 20a and a surface 20b arranged on the opposite side (front) of the light guide member 20 for a vehicle from the reflecting portion 22. It has a curved shape. The surface 20a is formed, for example, in a state inclined upward toward the front. Further, the surface 20b is formed, for example, in a state inclined downward toward the front. The corner portion 20c is arranged along the optical axis AX of the internal reflection surface 22a and is formed linearly in a direction perpendicular to or crossing the optical axis AX. The light shielding portion 23 forms, for example, a cutoff line Pc of a headlamp pattern P1, which will be described later, at the corner portion 20c. The cutoff line Pc includes a horizontal cutoff line and an oblique cutoff line. In this case, corner 20c has a horizontal portion (not shown) for forming a horizontal cut-off line and an inclined portion (not shown) for forming an oblique cut-off line.

The light shielding portion 23 is provided in a region including the corner portion 20c. The light shielding portion 23 may shield light by, for example, refracting or internally reflecting the light reaching the light shielding portion 23 in a direction different from the direction of the emission portion 24. A light absorption layer may be arranged in a portion corresponding to the light shielding portion 23, and the light may be blocked by absorbing light with the light absorption layer. The light internally reflected or refracted by the light shielding portion 23 is emitted to the outside of the vehicle light guide 20 and is absorbed by an inner housing or the like arranged outside the vehicle light guide 20 .

[Emitting part]
The emitting portion 24 emits the light that has been internally reflected by the reflecting portion 22 and has passed through the light shielding portion 23 to illuminate the headlamp pattern P1 (see FIG. 6) in front of the vehicle. The emitting portion 24 has a curved emitting surface 24a for emitting light. The exit surface 24a has a focal point (not shown) and an optical axis. The optical axis of the exit surface 24 a coincides or substantially coincides with the optical axis AX of the internal reflection surface 22 a of the reflection section 22 .

[Diversion part]
The course changing section 25 changes the course of part of the light passing through the light shielding section 23 . As shown in FIG. 1 , the path changing portion 25 is arranged at a position shifted to one side (for example, to the left) with respect to the center of the vehicle light guide 20 in the left-right direction.

3 is an enlarged view of a part of the vehicle light guide shown in FIG. 2. FIG. As shown in FIGS. 1 to 3 , the route changing section 25 has a first changing section 26 and a second changing section 27 . The first changing unit 26 and the second changing unit 27 change the path of a part of the light that reaches the predetermined area Pa in the headlamp pattern P1 (see FIG. 6) out of the light that passes through the light shielding unit 23. change. When the path changing portion 25 is provided, the amount of light reaching the predetermined area Pa of the headlamp pattern P1 is reduced compared to when the path changing portion 25 is not provided. Therefore, the brightness of the predetermined area Pa is reduced.

FIG. 4 is a diagram showing an example of the vehicle light guide of FIG. 3 when viewed from direction A. FIG. As shown in FIGS. 2 to 4 , the first changing portion 26 is arranged on the incident portion 21 side with respect to the light shielding portion 23 . The second changing portion 27 is arranged on the output portion 24 side with respect to the light shielding portion 23 . In addition, the first changing portion 26 and the second changing portion 27 are arranged in a state of being aligned on an imaginary straight line Q (see FIG. 4) that is parallel to the optical axis AX and parallel to the front-rear direction when viewed in direction A or in a plan view. be done. In this manner, the first changing portions 26 and the second changing portions 27 are arranged in a plurality of rows along the straight line direction of the imaginary straight line Q parallel to the optical axis AX on the reflecting surface 22a. Further, the first changing portion 26 and the second changing portion 27 are arranged at positions sandwiching the light shielding portion 23 in the direction in which the virtual straight line Q extends. In this embodiment, the first changing portion 26 and the second changing portion 27 are arranged near the light shielding portion 23 . For example, in the first changing portion 26 and the second changing portion 27, the distance from the light shielding portion 23 to the ends of the first changing portion 26 and the second changing portion 27 on the light shielding portion 23 side is It is arranged at a position shorter than the dimensions t1 and t2 of the 2-changed portion 27 .

The first changing portion 26 is formed in a triangular concave shape on the surface 20a in a cross-sectional view. Here, the concave shape is the shape of the vehicle light guide 20 when viewed from the outside. That is, when viewed from the inside of the vehicle light guide 20, the first changing portion 26 is provided in a state of protruding inward of the vehicle light guide 20 from the surface 20a. The first modified portion 26 has an internal reflecting surface 26a. The internal reflection surface 26 a is a flat surface arranged on the entrance portion 21 side of the first change portion 26 . As shown in FIG. 4, the internal reflective surface 26a is formed, for example, in a shape in which the dimension in the horizontal direction decreases as the depth from the surface 20a increases, but the shape is not limited to this.

The internal reflective surface 26a is provided to the inside of the vehicle light guide 20, that is, to be inclined upward with respect to the surface 20a from the rear to the front. The internal reflection surface 26 a internally reflects the light from the reflection section 22 in a direction away from the emission section 24 . The light internally reflected by the internal reflection surface 26a is emitted to the outside of the vehicle light guide 20 from the upper surface side of the vehicle light guide 20, for example, and the inner housing disposed outside the vehicle light guide 20. etc. is absorbed.

In the present embodiment, the first changing portion 26 is provided at a position closer to the incident portion 21 than the light shielding portion 23 as described above. At this position, for example, the light reflected by the region of the internal reflection surface 26a on the incident portion 21 side travels upward along the surface 20a. Therefore, the first change portion 26 internally reflects the light further upward by the internal reflection surface 26 a to change the course of the light, so that the light is reliably transmitted from the upper surface side of the vehicle light guide 20 to the outside of the vehicle light guide 20 . light can be emitted to

Like the first change portion 26, the second change portion 27 is formed in a triangular concave shape on the surface 20b in a cross-sectional view. Here, the concave shape is the shape of the vehicle light guide 20 when viewed from the outside. That is, when viewed from the inside of the vehicle light guide 20, the second changing portion 27 is provided in a state of protruding inward of the vehicle light guide 20 from the surface 20b. The second changing portion 27 has a refracting surface 27a and an external reflecting surface 27b. The refracting surface 27a is a flat surface arranged on the incident section 21 side of the second changing section 27 . The refracting surface 27a is provided to the inside of the vehicle light guide 20, that is, inclined upward with respect to the surface 20b. The external reflection surface 27b is a plane or curved surface arranged on the output section 24 side of the second changing section 27 . As shown in FIG. 4, the refracting surface 27a and the external reflecting surface 27b are formed in a shape such that the dimension in the left-right direction decreases as the depth from the surface 20b increases, but the shape is not limited to this.

The refracting surface 27 a refracts the light from the reflecting portion 22 toward the outside of the vehicle light guide 20 . Part of the light refracted toward the outside of the vehicle light guide 20 at the refracting surface 27 a is absorbed by an inner housing or the like arranged outside the vehicle light guide 20 . Further, part of the light refracted toward the outside of the vehicle light guide 20 at the refracting surface 27a may reach the external reflecting surface 27b. The external reflecting surface 27b reflects the light arriving from the refracting surface 27a outside the light guide. Therefore, the light emitted from the refracting surface 27 a to the outside of the light guide is prevented from entering the vehicle light guide 20 again. The light reflected by the external reflecting surface 27b is absorbed by an inner housing or the like arranged outside the vehicle light guide 20 . The refracting surface 27 a and the external reflecting surface 27 b have a structure in which a part of the surface 20 a is inclined toward the inside of the vehicle light guide 20 .

In the present embodiment, the second changing portion 27 is provided at a position closer to the emitting portion 24 than the light shielding portion 23 as described above. At this position, for example, the light reflected by the region of the internal reflection surface 26a on the side of the output portion 24 travels downward along the surface 20b. Therefore, the second changing portion 27 refracts the light further downward by the refracting surface 27 a to change the course, so that the light can be reliably emitted to the outside of the vehicle light guide 20 .

Further, the course changing unit 25 is arranged on the left side or the right side of the optical axis AX passing through the light source 10 on the side of the own lane with respect to the horizontal reference position in the headlight pattern P1. In this embodiment, a case where the vehicle light guide 20 is mounted on a vehicle traveling on a right-hand traffic road is described as an example. In this case, the right side of the headlight pattern P1 is the lane of the host vehicle, and the left side is the lane of the oncoming vehicle. Therefore, as shown in FIG. 4, the path changer 25 is arranged on the right side of the optical axis AX when mounted on the vehicle.

[motion]
Next, the operation of the vehicle headlamp 100 configured as described above will be described. FIG. 5 is a diagram showing an example of an optical path of light reflected by the internal reflection surface 22a. FIG. 6 is a diagram showing an example of a headlight pattern P1 illuminated on a virtual screen in front of the vehicle, and shows a pattern corresponding to a right-hand traffic vehicle. In FIG. 6, the VV line indicates the vertical line of the screen, and the HH line indicates the left and right horizontal lines of the screen. Also, here, the intersection of the vertical line and the horizontal line is assumed to be the reference position in the horizontal direction. By turning on each light source 10 in the light source unit U, light is emitted from the light emitting surface 11 . This light enters the vehicle light guide 20 from the first incident surface 21a and the second incident surface 21b of the incident portion 21, and is internally reflected toward the reflecting portion 22 by the incident-side reflecting surface 21c. The light internally reflected by the incident-side reflecting surface 21c is reflected toward the output surface 24a by the internal reflecting surface 22a of the reflecting section 22 .

As shown in FIG. 5, part of the light L1 reflected by the internal reflection surface 22a passes through the light blocking portion 23, reaches the exit surface 24a of the exit portion 24, and exits from the exit surface 24a. . As shown in FIG. 6, this light L1 is projected forward of the vehicle as a headlight pattern P1 having a cutoff line Pc. Note that FIG. 6 illustrates an example in which the oblique cutoff line of the cutoff line Pc is formed so as to be inclined downward toward the left side. A similar explanation can be applied to the case of tilting downward toward . Part of the light L2 reflected by the internal reflection surface 22a is blocked by the light blocking portion 23. As shown in FIG.

A part of the light L<b>3 of the light reflected by the internal reflection surface 22 a has its course changed by the first change unit 26 . The light L3 that has reached the first changing portion 26 is internally reflected by the internal reflection surface 26a, and the course is changed from the course L3a to the course L3b. This light L3 is emitted to the outside of the vehicle light guide 20 and is absorbed by an inner housing or the like arranged outside the vehicle light guide 20 .

Further, part of the light L<b>4 out of the light reflected by the internal reflection surface 22 a has its course changed by the second change unit 27 . The light L4 reaching the second changing portion 27 is refracted toward the outside of the vehicle light guide 20 at the refracting surface 27a, is reflected by the external reflecting surface 27b, and is changed from the course L4a to the course L4b. be. This light L4 is emitted to the outside of the vehicle light guide 20 and is absorbed by an inner housing or the like arranged outside the vehicle light guide 20 .

When the light L3 and the light L4 travel along the paths L3a and L4a, respectively, they reach the predetermined area Pa in the headlamp pattern P1. On the other hand, in the present embodiment, the light beams L3 and L4 that should travel along the paths L3a and L4a are changed to the paths L3b and L4b, respectively. Therefore, the amount of light applied to the predetermined area Pa is reduced. Therefore, for example, by arranging the route changing unit 25 so that the area corresponding to the position of the oncoming vehicle is the predetermined area Pa, the amount of light directed to the position corresponding to the oncoming vehicle is reduced, so that the dazzling of the oncoming vehicle is suppressed. be done. In the present embodiment, the course changing unit 25 is arranged on the side of the vehicle's driving lane with respect to the horizontal reference position in the headlight pattern P1 with respect to the optical axis AX passing through the light source 10, that is, on the right side in the vehicle-mounted state. be. In this case, in the headlight pattern P1, the predetermined area Pa is arranged on the left front side of the host vehicle. Therefore, the predetermined area Pa is arranged at a position corresponding to the oncoming vehicle.

As described above, the vehicular light guide 20 according to the present embodiment includes the incident portion 21 that receives the light from the light source 10, the reflecting portion 22 that internally reflects the light incident from the incident portion 21, and the reflecting portion 22. a light shielding part 23 for shielding a part of the light reflected by the light shielding part 23, and an emitting part 24 for emitting the light that has passed through the light shielding part 23 after being internally reflected by the reflecting part 22 to irradiate the headlamp pattern P1 in front of the vehicle. and a path changing unit 25 that changes the path of a part of the light that passes through the light shielding unit 23 and that is emitted from the emitting unit 24 to the predetermined area Pa of the headlight pattern P1 so as not to illuminate the predetermined area Pa. Prepare.

According to the present embodiment, part of the light passing through the light shielding portion 23, which is adjusted by the reflecting portion 22 so as to travel from the emitting portion 24 toward the predetermined area Pa of the headlight pattern P1, is directed to the predetermined area. By changing the direction in which Pa is not irradiated, the amount of light irradiated to the predetermined area Pa is reduced. Therefore, for example, by arranging the route changing unit 25 so that the area corresponding to the position of the oncoming vehicle is the predetermined area Pa, the amount of light directed to the position corresponding to the oncoming vehicle is reduced, thereby suppressing the dazzle of the oncoming vehicle. can do.

Further, in the vehicle light guide 20 according to the present embodiment, the path changing portion 25 is arranged near the light shielding portion 23 . According to this configuration, for example, when the predetermined area Pa is set in the vicinity of the cutoff line Pc in the headlamp pattern P1, the path changing portion 25 is arranged in the vicinity of the light shielding portion 23 so that the predetermined area Pa can efficiently reduce the amount of light.

Further, in the vehicle light guide 20 according to the present embodiment, the path changing portion 25 includes the first changing portion 26 arranged on the incident portion 21 side with respect to the light shielding portion 23 and the exit portion 26 with respect to the light shielding portion 23 . and a second changing portion 27 arranged on the 24 side. According to this configuration, since the first changing portion 26 and the second changing portion 27 are arranged at positions straddling the light shielding portion 23 in the optical axis direction, the amount of light irradiated to the predetermined area Pa is reduced in a well-balanced manner. be able to.

Further, in the vehicle light guide 20 according to this embodiment, the first changing portion 26 has an internal reflection surface 26 a that internally reflects the light from the reflecting portion 22 in a direction away from the emitting portion 24 . According to this configuration, it is possible to reliably change the course of the light adjusted by the reflector 22 so as to head toward the predetermined area Pa.

Further, in the vehicle light guide 20 according to this embodiment, the second changing portion 27 has a refracting surface 27a that refracts the light from the reflecting portion 22 toward the outside of the light guide. According to this configuration, it is possible to reliably change the course of the light adjusted by the reflector 22 so as to head toward the predetermined area Pa.

Further, in the vehicle light guide 20 according to the present embodiment, the second changing portion 27 has an external reflection surface 27b that reflects the light refracted toward the outside of the light guide by the refracting surface 27a outside the light guide. . According to this configuration, it is possible to reliably change the course of the light adjusted by the reflector 22 so as to head toward the predetermined area Pa.

Further, in the vehicle light guide 20 according to the present embodiment, the path changing portion 25 has a horizontal reference position in the headlight pattern P1, which is the left side or the right side of the vehicle-mounted state, of the optical axis AX passing through the light source 10. It is arranged on the side of the running line of the own vehicle with respect to the position. In this embodiment, the case where the vehicle light guide 20 is mounted on a vehicle traveling on a right-hand traffic road is taken as an example. can be made

The light source unit U according to this embodiment includes a light source 10 and the vehicle light guide 20 that guides and emits the light from the light source 10 to illuminate the headlamp pattern P1 in front of the vehicle. Further, the vehicle headlamp 100 according to this embodiment includes the light source unit U described above. Therefore, since the amount of light to the position corresponding to the oncoming vehicle is reduced, it is possible to suppress the dazzle of the oncoming vehicle.

The technical scope of the present invention is not limited to the above embodiments, and modifications can be made as appropriate without departing from the scope of the present invention. In the above embodiment, the configuration of the vehicle headlamp 100 mounted on a vehicle traveling on a right-hand traffic road has been described as an example. A similar explanation can be applied to the case where a headlight is mounted.

FIG. 7 is a diagram showing another example of a light guide for a vehicle, which is mounted on a vehicle traveling on a left-hand traffic road. In the vehicle light guide 120 shown in FIG. 7, the path changing portion 125 is arranged on the left side of the optical axis AX when the vehicle is mounted. Other configurations are the same as those of the vehicle light guide 20 according to the above embodiment.

FIG. 8 is a diagram showing another example of the headlight pattern that illuminates the front of the vehicle, and shows a pattern corresponding to a left-hand traffic vehicle. In this case, the headlight pattern P2 has a horizontal reference position, that is, the intersection of the vertical line VV and the horizontal line HH, on the left side is the driving line of the own vehicle, and on the right side is the driving lane of the oncoming vehicle. side. In this case, as shown in FIG. 8, by arranging the course changing unit 125 on the left side of the optical axis AX in the state where the vehicle is mounted, the headlight corresponding to the vehicle on the left-hand traffic road is obtained. In the pattern P2, the predetermined area Pa is arranged on the front right side of the host vehicle. Therefore, the predetermined area Pa is arranged at a position corresponding to the oncoming vehicle.

For example, in the above-described embodiment, the configuration in which the route changing unit 25 has two changing units (the first changing unit 26 and the second changing unit 27) has been described as an example, but the present invention is not limited to this. The route changing section 25 may be configured to have three or more changing sections.

In the above-described embodiment, one changing portion (first changing portion 26) is arranged on the incident portion 21 side with respect to the light shielding portion 23, and the other changing portion (second changing portion 27) is arranged with respect to the light shielding portion 23. Although the configuration in which it is arranged on the output section 24 side has been described as an example, it is not limited to this. For example, all of the plurality of changing portions may be arranged on the incident portion 21 side with respect to the light shielding portion 23, or all of the plurality of changing portions may be arranged on the exit portion 24 side with respect to the light shielding portion 23. may be arranged in the

In addition, in the above-described embodiment, the configuration in which the route changing section 25 (the first changing section 26 and the second changing section 27) is arranged near the light shielding section 23 has been described as an example, but the present invention is not limited to this. For example, the course changing section 25 may be arranged at a position away from the light shielding section 23 . Alternatively, only one of the first changing portion 26 and the second changing portion 27 may be arranged at a position away from the light shielding portion 23 .

Further, in the above-described embodiment, the configuration in which the first changing portion 26 and the second changing portion 27 are arranged in a straight line direction parallel to the optical axis AX in a plan view has been described as an example. Not limited. At least one of the first changing portion 26 and the second changing portion 27 may be arranged at a position out of the linear direction parallel to the optical axis AX in plan view.

AX... optical axis, L1, L2, L3, L4... light, L3a, L3b, L4a, L4b... path, P... headlamp pattern, Pa... area, Pc... cutoff line, t1, t2... dimension, U... light source Unit 10 Light source 11 Light emitting surface 20 Vehicle light guide 20a, 20b Surface 20c Corner 21 Incident portion 21a First incident surface 21b Second incident surface 21c 22 Reflecting portion 22a, 26a Internal reflecting surface 23 Light shielding portion 24 Output portion 24a Output surface 25 Course changing portion 26 First changing portion 27 Third 2 change part, 27a... refraction surface, 27b... external reflection surface, 100... vehicle headlamp

Claims (9)

an incident part that receives light from a light source;
a reflecting section that internally reflects the light incident from the incident section;
a light shielding portion that shields part of the light reflected by the reflecting portion;
an emission section that emits the light that has been internally reflected by the reflection section and passed through the light shielding section to irradiate a headlamp pattern in front of the vehicle;
a path changing unit that changes a path of a part of the light that passes through the light shielding unit and that is emitted from the emitting unit to a predetermined area of the headlamp pattern in a direction that the predetermined area is not irradiated; prepared ,
A plurality of the path changing portions are provided, and at least one is arranged on the exit portion side with respect to the light shielding portion,
The path changing section arranged on the emitting section side with respect to the light shielding section has a refracting surface that refracts the light from the reflecting section toward the outside of the light guide.
Vehicle light guide. The vehicle light guide according to claim 1, wherein the plurality of path changing portions are arranged near the light shielding portion. The vehicle light guide according to claim 1 or 2, wherein the plurality of path changing portions are arranged in a straight line direction of an imaginary straight line parallel to the optical axis of the reflecting portion. The plurality of path changing parts are a first path changing part arranged on the incident part side with respect to the light shielding part, and the course changing part arranged on the exit part side with respect to the light shielding part. The vehicular light guide according to claim 3 , further comprising a second path changing portion provided with a refracting surface . The vehicular light guide according to claim 4, wherein the first path changing portion has an internal reflecting surface that internally reflects the light from the reflecting portion in a direction away from the emitting portion. The path changing portion arranged on the emitting portion side with respect to the light shielding portion has an external reflection surface that reflects the light refracted toward the outside of the light guide by the refracting surface outside the light guide. The vehicle light guide according to any one of claims 1 to 5 . The course changing section is arranged on the side of the vehicle's running line with respect to the horizontal reference position in the headlamp pattern, out of the left side and the right side in the vehicle-mounted state, relative to the optical axis passing through the light source. The vehicle light guide according to any one of claims 1 to 6 . a light source;
The light guide for a vehicle according to any one of claims 1 to 7 , which guides and emits the light from the light source to illuminate a headlamp pattern in front of the vehicle. A vehicle headlamp comprising the light source unit according to claim 8 .

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