WO2021112063A1

WO2021112063A1 - Vehicle headlight

Info

Publication number: WO2021112063A1
Application number: PCT/JP2020/044605
Authority: WO
Inventors: 麻希子末次
Original assignee: 株式会社小糸製作所
Priority date: 2019-12-04
Filing date: 2020-12-01
Publication date: 2021-06-10
Also published as: CN114746695A; JPWO2021112063A1; CN114746695B

Abstract

A vehicle headlight (1) is provided with a first light source (42) and a convex projection lens (15) having an incident surface (151) and an exit surface (153). The incident surface (151) includes a first incident surface (151a) on which part of first light forming a first light distribution pattern for a low beam is incident, and a second incident surface (151b) on which another part of the first light for forming a second light distribution pattern for overhead-sign light is incident. The exit surface (153) includes a first exit surface (153a) and a second exit surface (153b). At least a part of the second exit surface (153b) is located in a position further forward than a tangent (155) to the first exit surface (153a) at a boundary between the first exit surface (153a) and the second exit surface (153b).

Description

Vehicle headlights

The present invention relates to a vehicle headlight.

Generally, a vehicle headlight includes a housing and a lighting unit housed inside the housing. The lamp unit may include a light source unit and a projection lens that projects light emitted from the light source unit toward the front through a housing. An example of such a headlight is described in Patent Document 1.

In the incident surface of the projection lens of the headlight described in Patent Document 1, a portion other than the upper end portion of the incident surface is formed as a first light distribution control surface, and the upper end portion is formed as a second light distribution control surface. To. The first light distribution control surface forms the first light distribution pattern for the low beam with a part of the light from the light source unit, and the second light distribution control surface is for the overhead sine light with another part of the light from the light source unit. The second light distribution pattern of is formed. The second light distribution pattern is projected above the first light distribution pattern. As a result, the visibility of an object such as a road sign located above the irradiation region of the first light distribution pattern can be improved.

Japanese Patent No. 5883588

In the incident surface of the projection lens of the headlight of Patent Document 1, a stepped surface is arranged between the first light distribution control surface and the second light distribution control surface. The stepped surface is recessed toward the exit surface side of the projection lens in the direction from the second light distribution control surface arranged on the upper end side of the projection lens toward the first light distribution control surface arranged on the lower end side of the projection lens. .. Further, the stepped surface extends along the left-right direction of the projection lens. When a part of the light from the light source unit is incident on such a stepped surface, the incident light may be projected above the irradiation region of the first light distribution pattern through the stepped surface. As a result, there is a concern that unintended horizontal streaks may occur in the first light distribution pattern.

Therefore, according to the present invention, in a state where the light distribution pattern for low beam and the light distribution pattern for overhead sine light are projected, the occurrence of unintended horizontal streak-like unevenness in the light distribution pattern for low beam can be suppressed before the vehicle. The purpose is to provide lighting.

In order to solve the above problems, the vehicle headlight of the present invention has a light source that emits light, an incident surface on which the light is incident, and an emitting surface that emits the light forward. A projection lens that is convex toward the surface, and the incident surface is larger than the first incident surface on which a part of the light that forms the first light distribution pattern for a low beam is incident and the first light distribution pattern. At least one second incident that is incident on another part of the light forming a second light distribution pattern for the overhead sine light projected upward and is continuously adjacent to the first incident surface. The second incident surface extends along the left-right direction of the projection lens, and the exit surface is continuously adjacent to the curved one exit surface and the first exit surface. It has a second exit surface that is arranged together, and the first exit surface emits the light that forms the first light distribution pattern and the light that forms the second light distribution pattern. The second exit surface emits the light forming at least the first light distribution pattern, and at least a part of the second emission surface is the first at the boundary between the first emission surface and the second emission surface. 1 It is characterized in that it is arranged at a position in front of the tangent line of the exit surface.

In the vehicle headlight of the present invention, the second incident surface is continuously arranged adjacent to the first incident surface, and the second incident surface extends along the left-right direction of the projection lens. In this case, if a part of the light from the light source is incident on the second incident surface instead of the first incident surface that should be incident, the light is projected above the projection position of the first light distribution pattern. There are times. Therefore, there is a concern that unintended horizontal streaks may occur in the first light distribution pattern for the low beam. However, in the vehicle headlight of the present invention, the second emission surface emits light forming at least the first light distribution pattern, and at least a part of the second emission surface is the first emission surface and the second emission surface. It is arranged at a position in front of the tangent line of the first exit surface at the boundary with and. Therefore, when the second exit surface emits light that forms the first light distribution pattern for the low beam, the light can spread in the first light distribution pattern, and unintended horizontal streak-like unevenness occurs in the first light distribution pattern. Can be suppressed. Therefore, according to this vehicle headlight, unintended horizontal streak-like unevenness occurs in the low beam light distribution pattern in a state where the low beam light distribution pattern and the overhead sine light light distribution pattern are projected. Can be suppressed.

Further, it is preferable that the second incident surface extends from one end of the projection lens to the other end of the projection lens in the left-right direction of the projection lens.

In this case, as compared with the case where the second incident surface does not extend from one end of the projection lens to the other end of the projection lens in the left-right direction of the projection lens, the light forming the second light distribution pattern for overhead sine light is emitted. It may be easy to enter the second incident surface. Further, if the second incident surface does not extend from one end of the projection lens to the other end of the projection lens in the left-right direction of the projection lens, the end portion of the second incident surface and the first incident surface in the left-right direction of the projection lens It leads to the provision of another surface to connect the. If, for example, light that forms the first light distribution pattern for the low beam is incident on the surface, the light may be emitted in an unintended direction, and the first light distribution pattern for the low beam may have an unintended shape. .. However, if the second incident surface extends as described above, the surface is not provided. Therefore, the incident of the light forming the first light distribution pattern on the surface can be suppressed, and the emission of the light in an unintended direction can be suppressed.

Further, when the projection lens is viewed in a plan view from the exit surface side, it is preferable that the second exit surface is arranged at a position overlapping at least a part of the second incident surface.

In this case, a part of the light incident on the vicinity of the second incident surface can travel to the second exit surface. Therefore, the occurrence of unintended horizontal streaks in the low beam light distribution pattern can be further suppressed.

Further, the incident surface has a plurality of the second incident surfaces, and when the projection lens is viewed in a plan view from the exit surface side, the second exit surface is at least one of a part of the second incident surfaces. It may be arranged at a position overlapping the portion and at a position not overlapping the other part of the second incident surface.

Further, in the cross section of the projection lens in the vertical direction of the projection lens, the second incident surface is inclined with respect to the central axis direction of the projection lens so as to approach the emission surface toward the lower side of the projection lens. It is preferable that the surface is an inclined surface.

In this case, the second light distribution pattern can be projected above the first light distribution pattern, and the visibility of an object such as a road sign located above the irradiation area of the first light distribution pattern can be improved.

As described above, according to the present invention, the occurrence of unintended horizontal streak-like unevenness in the low beam light distribution pattern is suppressed in the state where the low beam light distribution pattern and the overhead sine light light distribution pattern are projected. Vehicle headlights that can be provided can be provided.

FIG. 1 is a diagram schematically showing a configuration of a vehicle headlight according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lamp unit. FIG. 3 is a cross-sectional view of the lamp unit in the vertical direction. FIG. 4 is a front view of the reflector unit, the first light source, and the second light source shown in FIG. FIG. 5 is a front view of the projection lens viewed from the exit surface side. FIG. 6 is a cross-sectional view of the projection lens on the AA line shown in FIG. FIG. 7 is a cross-sectional view of the projection lens on the line BB shown in FIG. FIG. 8 is a diagram schematically showing an example of an optical path of light emitted from a first light source and a second light source in the cross section of the projection lens shown in FIG. FIG. 9 is a diagram showing a low beam light distribution pattern and an overhead sine light light distribution pattern. FIG. 10 is a diagram showing a light distribution pattern of overhead sine light and a light distribution pattern of high beam.

Hereinafter, a preferred embodiment of the vehicle headlight according to the present invention will be described in detail with reference to the drawings. The embodiments illustrated below are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. The present invention can be modified and improved without departing from the spirit of the present invention. In addition, the present invention may appropriately combine the components in each of the embodiments exemplified below. For ease of understanding, some parts may be exaggerated in each figure.

FIG. 1 is a diagram schematically showing the configuration of a vehicle headlight 1 according to the present invention. In FIG. 1, the housing 10 of the vehicle headlight 1 is shown in a vertical cross section of the vehicle headlight 1. The vehicle headlight 1 is a vehicle headlight. Headlights for automobiles are generally provided in each of the left and right directions in front of the vehicle. In the present specification, "right" means the right side in the traveling direction of the vehicle, and "left" means the left side in the traveling direction of the vehicle. Each of the left and right headlights has the same configuration except that the shape is generally symmetrical in the left-right direction. Therefore, in the following, one of the vehicle headlights 1 will be described. Further, the vehicle headlight 1 of the present embodiment is a direct irradiation type in which the light emitted from the lighting fixture unit LU of the vehicle headlight 1 is directly emitted forward through the projection lens 15 of the vehicle headlight 1. It is a lamp of.

The vehicle headlight 1 includes a housing 10 and a lamp unit LU housed in the housing 10.

The housing 10 includes a tubular housing 11, a front cover 12, and a back cover 13. An opening is provided in front of the housing 11, and the front cover 12 is fixed to the housing 11 so as to close the opening. Further, an opening smaller than the front opening is provided behind the housing 11, and the back cover 13 is fixed to the housing 11 so as to close the opening.

The housing 11, the front cover 12, and the back cover 13 form a light room 14 as a closed space. The lamp unit LU is housed in the lamp chamber 14. The back cover 13 is openable / closable or removable with respect to the housing 11 for replacement of the lamp unit LU through the opening at the rear of the housing 11. The housing 11 and the back cover 13 are made of, for example, resin.

The front cover 12 is made of a translucent material, and the light emitted from the lamp unit LU is transmitted through the front cover 12.

FIG. 2 is an exploded perspective view of the lamp unit LU. FIG. 3 is a cross-sectional view of the lamp unit LU in the vertical direction. FIG. 4 is a front view of the reflector unit 30, the first light source 42, and the second light source 52 shown in FIG.

As shown in FIGS. 2 and 3, the lamp unit LU includes a projection lens 15, a lens holder 20, a reflector unit 30, a first light source unit 40, a second light source unit 50, and a cooling unit 70. And.

The cooling unit 70 includes a heat sink 71 and a cooling fan 75. The heat sink 71 has a first base portion 72, a second base portion 73, and a plurality of heat radiation fins 74. The first base portion 72 is a plate-like body extending diagonally upward and left and right in the front, and the second base portion 73 is a plate-like body extending diagonally downward and left and right in the front from the lower end of the first base portion 72. The heat radiating fins 74 are integrally arranged on the back surfaces of the first base portion 72 and the second base portion 73, and are thermally connected to the first base portion 72 and the second base portion 73. The heat radiating fins 74 extend toward the back cover 13. The heat radiating fins 74 are arranged apart from each other in the left-right direction of the vehicle. The cooling fan 75 is arranged on the back side of the heat radiation fin 74. The cooling fan 75 is arranged with a gap from the heat radiation fin 74 and is fixed to the heat sink 71. The heat sink 71 is cooled by the air flow generated by the rotation of the cooling fan 75. The cooling fan 75 does not need to be fixed to the heat sink 71. The cooling fan 75 may be fixed to, for example, a blanket (not shown) holding the lamp unit LU, or may be fixed to the inner surface of the housing 11.

The first light source unit 40 includes a first substrate 41, a first light source 42, and a first connector 43. The first substrate 41 is a plate-like body, and is made of, for example, metal. The first light source 42 is arranged on the first substrate 41 and emits a first light that becomes a low beam and an overhead sine light. The first light source 42 has a plurality of light emitting elements arranged in parallel. The plurality of light emitting elements are arranged in a matrix to form rows in the vertical direction and the horizontal direction, and emit light toward the front. Each of the plurality of light emitting elements can individually change the amount of emitted light by the electric power supplied to each of the light emitting elements. Further, these light emitting elements are phosphor type LEDs (Light Emitting Diodes) that emit white light, and the first light source 42 is a so-called LED array. The number and configuration of the light emitting elements 21 are not particularly limited. For example, the light emitting element 21 may be a plurality of LEDs that emit light having different wavelengths, or may be a plurality of LDs (Laser Diodes) that emit light having different wavelengths. The first connector 43 is arranged on the first substrate 41 and is electrically connected to the first substrate 41. A first cable (not shown) that is electrically connected to a first light emission control circuit (not shown) is inserted into the first connector 43. The first light emission control circuit causes an electric signal to be input to the first light source 42 via the first cable, the first connector 43, and the first substrate 41. The lighting pattern of the light emitting element in the first light source 42 is controlled by the electric signal, whereby the light distribution of the first light emitted from the first light source 42 is controlled.

Since the first substrate 41 is overlapped and fixed on the front surface of the first base portion 72 of the cooling unit 70, the surface of the first substrate 41 is substantially parallel to the front surface of the first base portion 72. Since the first base portion 72 extends diagonally upward in the front as described above, the surface of the first substrate 41 also extends diagonally upward in the front. Further, the exit surface of the first light source 42 fixed to the first substrate 41 is substantially parallel to the surface of the first substrate 41. Therefore, the normal of the exit surface of the first light source 42 extends diagonally forward and downward.

The second light source unit 50 includes a second board 51 having the same configuration as the first board 41, a second light source 52, and a second connector 53. The second light source 52 is arranged on the second substrate 51 and emits a second light that becomes a high beam. The second light source 52 has the same configuration as the first light source 42. Therefore, the second light source 52 is a so-called LED array. A second cable (not shown) that is electrically connected to a second light emission control circuit (not shown) is inserted into the second connector 53. The second light emission control circuit causes an electric signal to be input to the second light source 52 via the second cable, the second connector 53, and the second substrate 51. The lighting pattern of the light emitting element in the second light source 52 is controlled by the electric signal, whereby the light distribution of the second light emitted from the second light source 52 is controlled.

Since the second substrate 51 is overlapped and fixed on the front surface of the second base portion 73 of the cooling unit 70, the surface of the second substrate 51 is substantially parallel to the front surface of the second base portion 73. Since the second base portion 73 extends diagonally forward and downward as described above, the surface of the second substrate 51 also extends diagonally downward and forward. Further, the exit surface of the second light source 52 fixed to the second substrate 51 is substantially parallel to the surface of the second substrate 51. Therefore, the normal of the exit surface of the second light source 52 extends diagonally forward and upward.

As described above, the first light source 42 is fixed to the first base portion 72 via the first substrate 41, and the second light source 52 is fixed to the second base portion 73 via the second substrate 51. Therefore, the second light source 52 is arranged below the first light source 42. Further, as shown in FIG. 3, the first light source 42 and the second light source 52 are arranged at positions asymmetrical with respect to the optical axis of the projection lens 15. Further, as described above, the normal of the exit surface of the first light source 42 extends diagonally forward and downward, and the normal of the exit surface of the second light source 52 extends diagonally forward and upward. Therefore, the direction in which the first light is emitted from the first light source 42 intersects with the direction in which the second light is emitted from the second light source 52.

As shown in FIGS. 3 and 4, the reflector unit 30 is for the shade 35, the reflector 31 for the first light source 42, the first side reflector 31a for the first light source 42, and the first light source 42. The second side reflector 31b, the reflector 32 for the second light source 52, the first side reflector 32a for the second light source 52, and the second side reflector 32b for the second light source 52.

The shade 35 is arranged between the first light source 42 and the second light source 52, and shields a part of the first light emitted from the first light source 42. Further, the shade 35 has a first reflecting surface 35a arranged on the upper surface of the shade 35 and a second reflecting surface 35b arranged on the lower surface of the shade 35. The first reflecting surface 35a is a concave reflecting surface that extends from the side of the first light source 42 toward the projection lens 15 and reflects a part of the first light forward. The second reflecting surface 35b is a concave reflecting surface that extends from the second light source 52 side toward the projection lens 15 and reflects a part of the second light forward. Further, the front end 35c of the shade 35 has a shape that matches the cut line described later, and is gradually recessed rearward from the left and right ends toward the center.

The reflector 31 is arranged above the first light source 42. The reflector 31 has a third reflecting surface 31r that is arranged on the side of the first light source 42 and covers the upper part of the first light source 42. The third reflecting surface 31r and the first reflecting surface 35a of the shade 35 are arranged along the parallel direction of a plurality of LEDs provided in the first light source 42. The third reflecting surface 31r and the first reflecting surface 35a are a pair of reflectors arranged so as to sandwich the plurality of LEDs from the upper and lower sides.

The first side reflector 31a is arranged on one end side in the parallel direction of a plurality of LEDs provided in the first light source 42 in the space sandwiched between the third reflecting surface 31r and the first reflecting surface 35a. Further, the second side reflector 31b is arranged on the other end side of the space. The first side reflector 31a and the second side reflector 31b are arranged so that the distance between them increases from the rear to the front.

The reflector 32 is arranged below the second light source 52. The reflector 32 has a fourth reflecting surface 32r that is arranged on the side of the second light source 52 and covers the lower part of the second light source 52. The fourth reflecting surface 32r and the second reflecting surface 35b of the shade 35 are arranged along the parallel direction of a plurality of LEDs provided in the second light source 52. The fourth reflecting surface 32r and the second reflecting surface 35b are a pair of reflectors arranged so as to sandwich the plurality of LEDs from the upper and lower sides.

The first side reflector 32a is arranged on one end side in the parallel direction of a plurality of LEDs provided in the second light source 52 in the space sandwiched between the fourth reflecting surface 32r and the second reflecting surface 35b. Further, the second side reflector 32b is arranged on the other end side of the space. The first side reflector 32a and the second side reflector 32b are arranged so that the distance between them increases from the rear to the front.

The lens holder 20 shown in FIGS. 1, 2 and 3 is a tubular member that holds the projection lens 15.

The flange portion 15a of the projection lens 15 is fixed to the lens holder 20 at the front end portion. As described above, the first light source 42 and the second light source 52 are LED arrays, and the amount of heat generated from the first light source 42 and the second light source 52 is reduced as compared with halogen lamps, discharged lamps, and the like. .. Therefore, the projection lens 15 and the lens holder 20 can be made of a resin such as polycarbonate. Since the projection lens 15 and the lens holder 20 are made of resin, the projection lens 15 and the lens holder 20 can be fixed to each other by welding. Further, since the projection lens 15 and the lens holder 20 are made of resin, the weight of the vehicle headlight 1 can be reduced and the manufacturing cost can be reduced.

A flange portion (not shown) is arranged at the rear end portion of the lens holder 20, and the flange portion is fixed to the first base portion 72 and the second base portion 73 of the cooling unit 70 by a screw (not shown). By fixing the projection lens 15 to the lens holder 20 and fixing the lens holder 20 to the cooling unit 70, the relative positions of the projection lens 15, the lens holder 20, and the cooling unit 70 are fixed. Further, the reflector unit 30, the first light source unit 40, and the second light source unit 50 are fixed to the cooling unit 70. Therefore, the relative positions of the reflector unit 30, the first light source unit 40, the second light source unit 50, the projection lens 15, and the lens holder 20 are also fixed.

As shown in FIG. 3, the projection lens 15 is a lens that is convex toward the front. The projection lens 15 is arranged in front of the first light source 42 and the second light source 52 at a position where the normal of the exit surface 42f of the first light source 42 and the normal of the exit surface 52f of the second light source 52 pass. To. In the vehicle headlight 1 of the present embodiment, the focal point of the projection lens 15 is provided between the front end 35c of the shade 35 and the projection lens 15. The projection lens 15 has an incident surface 151 on which the first light emitted from the first light source 42 and the second light emitted from the second light source 52 are incident, and a first incident surface 151 incident on the projection lens 15. It has an exit surface 153 that emits the light of the above and the second light toward the front. Therefore, the projection lens 15 projects the first light and the second light incident from the incident surface 151 on the back side of the projection lens 15 toward the front from the exit surface 153 on the front side of the projection lens 15.

In the present embodiment, the incident surface 151 has three first incident surfaces 151a and two second incident surfaces 151b.

The first incident surface 151a is arranged in an incident region where a part of the first light is incident on the incident surface 151 and an incident region where the second light is incident on the incident surface 151. The first light incident on the first incident surface 151a is the light forming the first light distribution pattern for the low beam, and the second light incident on the first incident surface 151a forms the light distribution pattern for the high beam. It is light.

The second incident surface 151b is arranged on the incident surface 151 in an incident region where another part of the first light is incident. The first light incident on the second incident surface 151b is light that forms a second light distribution pattern for overhead sine light. The second light distribution pattern for overhead sine light is a light distribution pattern projected above the first light distribution pattern for low beam. Further, the second light is also incident on the second incident surface 151b.

Next, the positions of the three first incident surfaces 151a and the two second incident surfaces 151b on the incident surface 151 will be described.

From the upper end to the lower end of the projection lens 15, the first incident surface 151a and the second incident surface 151b are arranged alternately adjacent to each other and continuously. A first incident surface 151a is arranged at the upper end and the lower end of the projection lens 15.

The first incident surface 151a located at the uppermost end of the projection lens 15 is arranged on the incident surface 151 in a region where the first light and the second light are incident. The first light incident on the first incident surface 151a is light that forms a cut line of the first light distribution pattern for the low beam. Further, the other two first incident surfaces 151a arranged below the first incident surface 151a are arranged on the incident surface 151 in a region where the first light and the second light are incident.

The two second incident surfaces 151b are arranged on the incident surface 151 in a region where the first light is incident. In the vertical direction of the projection lens 15, one second incident surface 151b is arranged above the other second incident surface 151b.

In the cross section of the projection lens 15 in the vertical direction of the projection lens 15 shown in FIG. 3, the second incident surface 151b is directed toward the central axis C of the projection lens 15 so as to approach the exit surface 153 toward the lower side of the projection lens 15. It is an inclined surface that is inclined with respect to it. Therefore, one of the second incident surfaces 151b arranged on the upper side in the vertical direction of the projection lens 15 causes the first incident surface 151a arranged on the uppermost side in the vertical direction of the projection lens 15 to be arranged on the rear side. The first incident surface 151a arranged in the center of the one incident surface 151a is arranged in the front. Further, the first incident surface 151a arranged on the lowermost side in the vertical direction of the projection lens 15 is further arranged forward by the other second incident surface 151b.

FIG. 5 is a front view of the projection lens 15 viewed from the exit surface 153 side. In FIG. 5, the second incident surface 151b arranged on the incident surface 151, which is the back surface of the projection lens 15, is projected by a broken line. The second incident surface 151b extends along the left-right direction of the projection lens 15. Further, the second incident surface 151b extends from one end of the projection lens 15 to the other end of the projection lens 15 in the left-right direction of the projection lens 15. The portion of the incident surface 151 other than the second incident surface 151b arranged as described above is the first incident surface 151a.

As shown in FIG. 5, the exit surface 153 has a first exit surface 153a and two second exit surfaces 153b.

As shown in FIG. 5, when the projection lens 15 is viewed in a plan view from the exit surface 153 side, one second exit surface 153b is arranged on one end side of the projection lens 15 in the left-right direction of the projection lens 15, and the other second emission surface 153b is arranged. The two exit surfaces 153b are arranged on the other end side of the projection lens 15 apart from one second exit surface 153b.

As shown in FIG. 5, when the projection lens 15 is viewed in a plan view from the emission surface 153 side, a part of the two second emission surfaces 153b is the first incident surface arranged on the uppermost side in the vertical direction of the projection lens 15. It is arranged at a position overlapping 151a. Further, when the projection lens 15 is viewed in a plan view from the exit surface 153 side, another part of the two second exit surfaces 153b is a part of one second incident surface 151b arranged on the upper end side of the projection lens 15. It is placed at a position that overlaps with. The part is between one end and the other end of the second incident surface 151b in the left-right direction of the projection lens 15. Since the second exit surfaces 153b are arranged so as to be offset from each other, the portion where one second exit surface 153b overlaps the first incident surface 151a and the second incident surface 151b arranged on the uppermost side is the other second. 2 The exit surface 153b is arranged away from the portion overlapping the first incident surface 151a and the second incident surface 151b, which are arranged on the uppermost side. Further, when the projection lens 15 is viewed in a plan view from the exit surface 153 side, if the remaining part of each second exit surface 153b overlaps with the other second incident surface 151b arranged on the lower end side of the projection lens 15. Instead, it is arranged at a position overlapping the first incident surface 151a arranged in the center of the three first incident surfaces 151a. Therefore, each second exit surface 153b is from the first incident surface 151a arranged on the uppermost side to the first incident surface 151a located between one second incident surface 151b and the other second incident surface 151b. It is postponed. When the projection lens 15 is viewed in a plan view from the exit surface 153 side, each second exit surface 153b is arranged on the uppermost side of the one second incident surface 151b and the first incident surface 151a arranged in the center. It overlaps a lot with one incident surface 151a. In the exit surface 153, the portion other than the second exit surface 153b is the first exit surface 153a, and the second exit surface 153b is continuously arranged adjacent to the first exit surface 153a.

FIG. 6 is a cross-sectional view of the projection lens 15 on the AA line shown in FIG. FIG. 7 is a cross-sectional view of the projection lens on the line BB shown in FIG.

The first exit surface 153a is a part of a spherical surface and is a curved surface that is curved with a constant curvature. The first exit surface 153a is convex toward the front.

The second exit surface 153b is a curved surface that is curved with a curvature different from the curvature of the first exit surface 153a. For example, the curvature of the second exit surface 153b is made larger than the curvature of the first exit surface 153a. Further, on the second exit surface 153b, the curvature of the second exit surface 153b in the cross section shown in FIG. 6 in which the second exit surface 153b is parallel is the second exit surface in the cross section shown in FIG. 7 in the direction perpendicular to the parallel direction. It is made larger than the curvature of 153b. Here, the broken lines shown in FIGS. 6 and 7 indicate a virtual portion 153d of the first exit surface 153a when it is assumed that the second exit surface 153b is not provided on the exit surface 153. The virtual portion 153d is located on an extension of the first exit surface 153a in the actual portion as shown in FIGS. 6 and 7. Comparing the virtual portion 153d shown by the broken line and the second exit surface 153b, the second exit surface 153b is convex toward the front of the virtual portion 153d. The maximum amount of protrusion of the second exit surface 153b forward with respect to the virtual portion 153d is, for example, several μm.

In FIG. 6, the tangent line of the first exit surface 153a at the boundary between the first exit surface 153a and the second exit surface 153b is shown as a tangent line 155 as a alternate long and short dash line. A part of the second exit surface 153b is arranged at a position in front of the tangent line 155.

The first exit surface 153a comprises a first light forming a first light distribution pattern for a low beam, a first light forming a second light distribution pattern for overhead sine light, and a light distribution pattern for a high beam. It emits a second light to be formed.

The second exit surface 153b comprises a first light forming a first light distribution pattern for low beams, a first light forming a second light distribution pattern for overhead sine light, and a light distribution pattern for high beams. It emits a second light to be formed. The second exit surface 153b emits the first light that forms the first light distribution pattern for the low beam so that the first light spreads in the first light distribution pattern for the low beam. Further, in the second exit surface 153b shown in FIG. 7, when the light passing through the second exit surface 153b and the light passing through the virtual portion 153d of the first exit surface 153a are compared, the second exit surface 153b is the second. The light passing through the exit surface 153b is emitted toward the lower side of the projection lens 15 with respect to the light passing through the virtual portion 153d.

Next, the emission of light from the vehicle headlight 1 and the operation of the vehicle headlight 1 of the present embodiment will be described. FIG. 8 is a diagram schematically showing an example of an optical path of light emitted from a first light source 42 and a second light source 52 in the cross section of the projection lens shown in FIG. As in FIGS. 6 and 7, the virtual portion 153d of the first exit surface 153a is indicated by a broken line, and in FIG. 8, the virtual portion 153d is also shown by a broken line. Further, the angle of each reflecting surface, the reflection angle of light, the refraction angle, and the like shown in FIG. 8 may not be accurate. As described above, the vehicle headlights 1 are provided symmetrically on the left and right sides of the vehicle. In the following description of the light distribution, the light distribution when the vehicle headlights 1 provided on the left and right are similarly turned on or off will be described.

First, the first light L11, L12, L13 for the low beam emitted from the first light source 42 will be described. The first light L11, L12, L13 is incident on the projection lens 15 from the incident surface 151 as described below. Then, the first light L11, L12, L13 passes through the projection lens 15 and is emitted forward from the exit surface 153 via the front cover 12. As a result, the first lights L11, L12, and L13 form the first light distribution pattern PL for the low beam shown in FIG.

In each LED of the first light source 42, the intensity of the first light L11 emitted in the direction perpendicular to the exit surface 42f is relative to the intensity of the first lights L12 and L13 emitted in the other directions. Become strong in. The normal of the exit surface 42f of each LED extends diagonally forward and downward. Therefore, the first light L11 vertically emitted from the exit surface 42f is emitted toward the front end 35c of the shade 35 and passes near the front end 35c of the shade 35 or in front of the front end 35c of the shade 35. Therefore, all or part of the first light L11 vertically emitted from the exit surface 42f of the first light source 42 is irradiated in the vicinity of the front end 35c of the shade 35, and is incident on the front end 35c of the shade 35. The amount of light of the light L11 increases. The first light L11 described above is incident on the projection lens 15 from the first incident surface 151a arranged at the center of the three first incident surfaces 151a in the vertical direction of the projection lens 15, for example. Further, a part of the first light emitted behind the front end 35c of the shade 35 is blocked by the shade 35. By the shade 35 thus shielding a part of the first light, the front end 35c of the shade 35 forms a cut line of the first light distribution pattern PL for the low beam by the first light. As described above, a part of the first light is directly incident on the front end 35c of the shade 35 on which the cut line is formed, and the amount of light of the first light incident on the front end 35c is increased, so that the front end of the shade 35 is formed. The area around 35c tends to be bright. Here, the focal point 15f of the projection lens 15 is formed between the front end 35c of the shade 35 and the projection lens 15, that is, in the vicinity of the front end 35c of the shade 35, thereby cutting the first light distribution pattern PL for the low beam. The area around the line becomes brighter. The front end 35c of the shade 35 has a shape that matches the shape of a desired cut line for a low beam, and is formed in a concave shape as described above in the present embodiment.

Further, the other part of the first light L11 (not shown) is reflected forward by any one of the first reflecting surface 35a, the third reflecting surface 31r, the first side reflector 31a, and the second side reflector 31b. 1 The incident surface 151a is incident on the projection lens 15. The first incident surface 151a is, for example, an incident surface arranged at the center and the lowermost side of the three first incident surfaces 151a in the vertical direction of the projection lens 15.

The first light L11 reflected by the first reflecting surface 35a has a small divergence angle, is reflected forward, and is incident on the projection lens 15 from the first incident surface 151a. Since the divergence angle is small, a predetermined range of the light distribution of the first light is relatively brighter than the other ranges. For example, by collecting the first light L11 reflected by the first reflecting surface 35a near the front end 35c of the shade 35, the vicinity of the cut line of the first light distribution pattern PL for the low beam becomes brighter.

As described above, the first light L11 incident on the projection lens 15 passes through the projection lens 15 and is emitted from the first emission surface 153a of the emission surface 153.

Further, the first light L12 is reflected by the third reflecting surface 31r and is incident on the projection lens 15 from the first incident surface 151a. The first incident surface 151a is an incident surface arranged on the lowermost side of the three first incident surfaces 151a in the vertical direction of the projection lens 15. Then, the first light L12 passes through the projection lens 15 and is emitted from the first exit surface 153a of the exit surface 153. It is preferable that the first light L12 reflected by the third reflecting surface 31r is irradiated in a wider range to form the first light distribution pattern PL for the low beam. Therefore, it is preferable that the first light L12 reflected by the third reflecting surface 31r is diverged.

At least a part of the first light L13 passes in front of the front end 35c of the shade 35 and is directly incident on the projection lens 15 from the first incident surface 151a. The first incident surface 151a is an incident surface arranged on the uppermost side of the three first incident surfaces 151a in the vertical direction of the projection lens 15. The first light L13 incident on the projection lens 15 passes through the projection lens 15 and is emitted from the second emission surface 153b of the emission surface 153. The first light L13 emitted from the second exit surface 153b travels toward the lower side of the projection lens 15 than the first light L11 emitted from the first emission surface 153a. Further, the first light L13 is directed toward the lower side of the projection lens 15 by the second emission surface 153b as compared with the case where the second emission surface 153b passes through the virtual portion 153d of the first emission surface 153a as shown by the broken line arrow L13a in FIG. And exit.

As described above, the first light L11, L12, L13 is incident on the projection lens 15 from the incident surface 151, passes through the projection lens 15, and is emitted forward from the exit surface 153 via the front cover 12. Further, the first light source 42 is composed of a plurality of LEDs arranged side by side on the left and right sides of the projection lens 15. Therefore, for example, a part of the first light L11 and L12 is also emitted from the first exit surface 153a of the emission surface 153 in a cross section different from the cross section shown in FIG. The first exit surface 153a indicates, for example, a first exit surface 153a located between the two second exit surfaces 153b in FIG. As a result, the first lights L11, L12, and L13 form the first light distribution pattern PL for the low beam shown in FIG.

Further, the first light source 42 emits the first light L14 which is a part of the first light. The first light L14 travels directly to the second incident surface 151b arranged on the uppermost side of the two second incident surfaces 151b in the vertical direction of the projection lens 15, and the projection lens 15 travels directly from the second incident surface 151b. Incident on. The second incident surface 151b extends from one end of the projection lens 15 to the other end of the projection lens 15 in the left-right direction of the projection lens 15. Therefore, as compared with the case where the second incident surface 151b does not extend from one end of the projection lens 15 to the other end of the projection lens 15, the incident region on the second incident surface 151b is widened, and the first light L14 is second. It becomes easy to enter the incident surface 151b. The first light L14 passes through the projection lens 15 and is emitted forward from the second exit surface 153b of the exit surface 153 via the front cover 12. The first light L14 is emitted by the second exit surface 153b toward the lower side of the projection lens 15 as compared with the case where the first light L14 passes through the virtual portion 153d of the first emission surface 153a as shown by the broken line arrow L14a in FIG. To do. The second incident surface 151b is an inclined surface that is inclined with respect to the central axis direction of the projection lens so as to approach the exit surface 153 toward the lower side of the projection lens 15. Therefore, the first light L14 is emitted above the first light L11 forming a cut line of the first light distribution pattern PL for the low beam. As a result, the first light L14 forms the second light distribution pattern PO for the overhead sine light shown in FIG. 9, which is projected above the irradiation region of the first light distribution pattern PL for the low beam.

By the way, it is assumed that a part of the first light is incident on the second incident surface 151b extending along the left-right direction of the projection lens 15. The first light is different from the first light L14 that forms the second light distribution pattern PO for overhead sine light, and is the light that forms the first light distribution pattern PL for the low beam. When the first light is incident on the second incident surface 151b, it is projected above the irradiation region of the first light distribution pattern PL for the low beam through the second incident surface 151b, similarly to the first light L14. It ends up. As a result, there is a concern that unintended horizontal streak-like unevenness may occur in the first light distribution pattern PL for the low beam.

However, in the present embodiment, at least a part of the first light forming the first light distribution pattern PL for the low beam is emitted from the second exit surface 153b. A part of the second exit surface 153b is arranged at a position in front of the tangent line 155 of the first exit surface 153a at the boundary between the first exit surface 153a and the second emission surface 153b. Therefore, when the second exit surface 153b emits the first light forming the first light distribution pattern PL for the low beam, the first light spreads in the first light distribution pattern PL for the low beam, and the first light for the low beam is emitted. 1 The occurrence of unintended horizontal streaks in the light distribution pattern PL is suppressed.

Next, the second lights L21, L22, L23, L24, and L25 for the high beam emitted from the second light source 52 will be described. The second light L21, L22, L23, L24, L25 is incident on the projection lens 15 from the incident surface 151 as described below. First, the second lights L21 and L22 are incident on the projection lens 15 from the first incident surface 151a arranged on the uppermost side of the three first incident surfaces 151a in the vertical direction of the projection lens 15. The second lights L23 and L24 are incident on the projection lens 15 from the first incident surface 151a arranged on the lowermost side of the three first incident surfaces 151a in the vertical direction of the projection lens 15. Further, the second light L25 is incident on the projection lens 15 from the second incident surface 151b arranged on the uppermost side of the two second incident surfaces 151b in the vertical direction of the projection lens 15. Then, the second light L21, L22, L23, L24, L25 passes through the projection lens 15 and is emitted forward from the exit surface 153 via the front cover 12. At this time, at least a part of the second lights L21, L22, and L25 is emitted upward from the first lights L11, L12, and L13. Therefore, at least a part of the second lights L21 and L22 forms a light distribution above the cut line. Further, when the second light is emitted from the second light source 52, the first light is also emitted from the first light source 42. Therefore, the light distribution by the second light emitted from the second light source 52 and the light distribution by the first light emitted from the first light source 42 are combined to form the light distribution pattern PH for the high beam shown in FIG. Will be done. Further, the second light L25 is emitted upward from the first light L14 forming the second light distribution pattern PO for the overhead sine light. Therefore, the outer edge of the light distribution pattern PH for the high beam is formed outside the outer edge of the second light distribution pattern PO for the overhead sine light. The second light L21, L22, L23, L24, and L25 will be described below.

The second lights L21 and L22 are emitted from the exit surface 52f of each LED in the second light source 52. The normal of the exit surface 52f of each LED extends diagonally forward and upward. Therefore, the second light L21 that is vertically emitted from the exit surface 52f is emitted toward the front end 35c of the shade 35, and the vicinity of the front end 35c of the shade 35 tends to be bright. Here, as described above, the focal point of the projection lens 15 is formed in the vicinity of the front end 35c of the shade 35, so that the vicinity of the cut line, that is, the light distribution of the first light and the light distribution of the second light are arranged. The overlapping part becomes relatively brighter than the other parts.

At least a part of the second light L21 passing in front of the front end 35c of the shade 35 is directly incident on the projection lens 15 from the first incident surface 151a arranged on the uppermost side. Further, the other part of the second light is reflected forward by any one of the second reflecting surface 35b, the fourth reflecting surface 32r, the first side reflector 32a, and the second side reflector 32b, and the first incident surface. It is incident on the projection lens 15 from 151a.

Further, the second light L22 is reflected by the fourth reflecting surface 32r and is incident on the projection lens 15 from the first incident surface 151a arranged on the uppermost side. Then, the second light L22 passes through the projection lens 15 and is emitted from the second exit surface 153b of the exit surface 153. It is preferable that the second light L22 reflected by the fourth reflecting surface 32r is irradiated in a wider range to form a light distribution of the second light. Therefore, it is preferable that the second light L22 reflected by the fourth reflecting surface 32r is diverged.

When the second light L21 and L22 passing through the second exit surface 153b pass through the virtual portion 153d of the first exit surface 153a by the second emission surface 153b as shown by the broken line arrows L21a and L22a in FIG. It emits toward the lower side.

The second light L23 is reflected forward by the second reflecting surface 35b with a small divergence angle, and travels to the first incident surface 151a arranged at the lowermost side. Next, the second light L23 is incident on the projection lens 15 from the first incident surface 151a. Further, the second light L24 travels directly to the first incident surface 151a arranged on the lowermost side, and is incident on the projection lens 15 from the first incident surface 151a. The second lights L23 and L24 pass through the projection lens 15 and are emitted from the first exit surface 153a of the exit surface 153. Therefore, a predetermined range of the second light distribution is relatively brighter than the other ranges. For example, by collecting the second light L23 reflected by the second reflecting surface 35b in the vicinity of the front end 35c of the shade 35, the portion where the light distribution of the first light and the light distribution of the second light overlap becomes brighter. Become.

Further, the second light L25 travels directly to the second incident surface 151b arranged on the uppermost side, and is incident on the projection lens 15 from the second incident surface 151b. The second incident surface 151b extends from one end of the projection lens 15 to the other end of the projection lens 15 in the left-right direction of the projection lens 15. Therefore, as compared with the case where the second incident surface 151b does not extend from one end of the projection lens 15 to the other end of the projection lens 15, the incident region on the second incident surface 151b is widened, and the second light L25 is second. It becomes easy to enter the incident surface 151b. The second light L25 passes through the projection lens 15 and is emitted from the second exit surface 153b of the exit surface 153. The second light L25 passing through the second exit surface 153b is lower than the case where the second light L25 passes through the virtual portion 153d of the first emission surface 153a by the second emission surface 153b as shown by the broken line arrow L25a in FIG. Exit toward. The second incident surface 151b is an inclined surface that is inclined with respect to the central axis direction of the projection lens 15 so as to approach the exit surface 153 toward the lower side of the projection lens 15. Therefore, the second light L25 is the first light L11 forming the cut line of the first light distribution pattern PL for the low beam and the first light L14 forming the second light distribution pattern PO for the overhead sine light. It emits above.

As described above, the second light L21, L22, L23, L24, L25 enters the projection lens 15 from the incident surface 151, passes through the projection lens 15, and moves forward from the exit surface 153 via the front cover 12. Exit. The second light source 52 is composed of a plurality of LEDs arranged side by side on the left and right sides of the projection lens 15. Therefore, for example, a part of the second lights L21, L22, and L25 is also emitted from the first exit surface 153a of the emission surface 153 in a cross section different from the cross section shown in FIG. The first exit surface 153a indicates, for example, a first exit surface 153a located between the two second exit surfaces 153b in FIG. As a result, the second light L21, L22, L23, L24, and L25 together with the first light L11, L12, and L13 form the light distribution pattern PH for the high beam shown in FIG. Further, the second light L25 is emitted above the first light L14. Therefore, the light distribution pattern PH for the high beam includes the second light distribution pattern PO for the overhead sine light.

As described above, in the vehicle headlight 1 of the present embodiment, the first light source 42 that emits the first light, the incident surface 151 on which the first light is incident, and the first light are directed forward. It has an exit surface 153 that emits light, and includes a projection lens 15 that is convex toward the front. The incident surface 151 is a first incident surface 151a on which a part of the first light forming the first light distribution pattern for the low beam is incident, and an overhead sign projected above the first light distribution pattern for the low beam. It has a second incident surface 151b in which another part of the first light forming a second light distribution pattern for light is incident and is continuously arranged adjacent to the first incident surface 151a. The second incident surface 151b extends along the left-right direction of the projection lens 15. The exit surface 153 has a first exit surface 153a which is a curved surface and a second exit surface 153b which is continuously arranged adjacent to the first exit surface 153a. The first exit surface 153a emits the first light forming the first light distribution pattern for the low beam and the first light forming the second light distribution pattern for the overhead sine light. The second exit surface 153b emits first light that forms at least a first light distribution pattern for the low beam. A part of the second exit surface 153b is arranged at a position in front of the tangent line 155 of the first exit surface 153a at the boundary between the first exit surface 153a and the second emission surface 153b.

In the vehicle headlight 1 of the present embodiment, the second incident surface 151b is continuously arranged adjacent to the first incident surface 151a, and the second incident surface 151b extends along the left-right direction of the projection lens. Exists. In this case, if a part of the first light from the first light source 42 is incident on the second incident surface 151b instead of the first incident surface 151a that should be incident, the first light is for low beam. It may be projected above the projection position of the first light distribution pattern of. Therefore, there is a concern that unintended horizontal streaks may occur in the first light distribution pattern for the low beam. However, in the vehicle headlight 1 of the present embodiment, the second emission surface 153b emits at least the first light forming the first light distribution pattern for the low beam, and a part of the second emission surface 153b is emitted. It is arranged at a position in front of the tangent line 155 of the first exit surface 153a at the boundary between the first exit surface 153a and the second exit surface 153b. Therefore, when the second exit surface 153b emits light forming the first light distribution pattern for the low beam, the first light can spread in the first light distribution pattern for the low beam, and the first light distribution pattern for the low beam can be spread. The occurrence of unintended horizontal streaks in the above can be suppressed. Therefore, according to the vehicle headlight 1, unintended horizontal streak-like unevenness occurs in the low beam light distribution pattern in a state where the low beam light distribution pattern and the overhead sine light light distribution pattern are projected. Can be suppressed.

Further, in the vehicle headlight 1 of the present embodiment, it is preferable that the second incident surface 151b extends from one end of the projection lens 15 to the other end of the projection lens 15 in the left-right direction of the projection lens 15.

In this case, the second light distribution pattern for overhead sine light is provided as compared with the case where the second incident surface 151b does not extend from one end of the projection lens 15 to the other end of the projection lens 15 in the left-right direction of the projection lens 15. The first light to be formed can easily enter the second incident surface 151b. Further, if the second incident surface 151b does not extend from one end of the projection lens 15 to the other end of the projection lens 15 in the left-right direction of the projection lens 15, the end portion of the second incident surface 151b in the left-right direction of the projection lens 15 This leads to the provision of another surface connecting the first incident surface 151a and the first incident surface 151a. If, for example, light that forms the first light distribution pattern for the low beam is incident on the surface, the light may be emitted in an unintended direction, and the first light distribution pattern for the low beam may have an unintended shape. .. Further, for example, even if the light forming the light distribution pattern for the high beam is incident, the light distribution pattern for the high beam may have an unintended shape. However, if the second incident surface 151b extends as described above, the surface is not provided. Therefore, the incident of light forming the first light distribution pattern and the light distribution pattern for the high beam on the surface can be suppressed, and the emission of light in an unintended direction can be suppressed.

Further, in the vehicle headlight 1 of the present embodiment, when the projection lens 15 is viewed in a plan view from the exit surface 153 side, the second exit surface 153b is arranged at a position overlapping at least a part of the second incident surface 151b. To.

In this case, a part of the light incident on the vicinity of the second incident surface 151b can travel to the second exit surface 153b. Therefore, the occurrence of unintended horizontal streaks in the low beam light distribution pattern can be further suppressed.

Further, in the present embodiment, in the cross section of the projection lens 15 in the vertical direction of the projection lens 15, the central axis of the projection lens 15 is such that the second incident surface 151b approaches the exit surface 153 toward the lower side of the projection lens 15. It is preferable that the surface is inclined with respect to the C direction.

In this case, the second light distribution pattern for overhead sign light can be projected above the first light distribution pattern for low beam, such as a road sign located above the irradiation area of the first light distribution pattern for low beam. The visibility of the object can be improved.

Although the present invention has been described above by taking the above-described embodiment as an example, the present invention is not limited thereto.

At least one first incident surface 151a may be arranged.

At least one second incident surface 151b may be arranged.

The first exit surface 153a may be an exit surface in which a plurality of surfaces formed with different curvatures are continuous. In this case, the first exit surface 153a is an aspherical surface. Further, the first exit surface 153a may be formed with irregularities.

At least one second exit surface 153b may be arranged.

The second exit surface 153b may be an exit surface in which a plurality of surfaces formed with different curvatures are continuous. In this case, the second exit surface 153b is an aspherical surface. Further, the second exit surface 153b may be formed with irregularities.

The second exit surface 153b may be a flat surface.

The second exit surface 153b may be an exit surface that is curved with a constant curvature. In this case, the second exit surface 153b is a spherical surface. The curvature of the second exit surface 153b may be larger than the constant curvature of the first exit surface 153a.

The curvature of the second exit surface 153b may be the same as that of the first exit surface 153a. In this case, the center of the circle having the second exit surface 153b on a part of the circumference is arranged at a position ahead of the center of the circle having the first exit surface 153a on a part of the circumference. The curvature of the second exit surface 153b may be smaller than that of the first exit surface 153a. Further, on the second exit surface 153b, the curvature of the second exit surface 153b in the cross section shown in FIG. 6 in which the second exit surface 153b is parallel is the second exit surface in the cross section shown in FIG. 7 in the direction perpendicular to the parallel direction. It may be the same as the curvature of 153b, or it may be smaller than the curvature.

At least a part of the second exit surface 153b may be arranged at a position in front of the tangent line 155 of the first exit surface 153a at the boundary between the first exit surface 153a and the second emission surface 153b.

The second exit surface 153b may emit light that forms at least the first light distribution pattern for the low beam.

One of the second incident surfaces 151b may be arranged at a position overlapping the incident position on the incident surface 151 of the first light forming the cut line of the first light distribution pattern for the low beam.

When the projection lens 15 is viewed in a plan view from the emission surface 153 side, the second emission surface 153b may be arranged at a position overlapping at least a part of the second entrance surface 151b arranged on the upper end side of the projection lens 15. Further, when the projection lens 15 is viewed in a plan view from the exit surface 153 side, the second exit surface 153b is arranged at a position overlapping at least a part of a part of the second incident surface 151b, and the other part of the second incident surface is second incident. It may be arranged at a position that does not overlap with the surface 151b. A part of the second incident surface 151b is an incident surface arranged on the upper end side of the projection lens 15, and a part of the second incident surface 151b is an incident surface arranged on the lower end side of the projection lens 15.

As described above, according to the present invention, when the low beam light distribution pattern and the overhead sine light light distribution pattern are projected, unintended horizontal streak-like unevenness occurs in the low beam light distribution pattern. Vehicle headlights that can be suppressed are provided, and the vehicle headlights can be used in the field of vehicle headlights such as automobiles.

Claims

A light source that emits light and
A projection lens having an incident surface on which the light is incident and an exit surface on which the light is emitted toward the front, and a projection lens having a convex shape toward the front.
With
The incident surface is
A first incident surface on which a part of the light forming the first light distribution pattern for a low beam is incident, and
Another part of the light forming the second light distribution pattern for overhead sine light projected above the first light distribution pattern is incident and is continuously arranged adjacent to the first incident surface. With at least one second incident surface
Have,
The second incident surface extends along the left-right direction of the projection lens.
The exit surface is
The first exit surface, which is a curved surface,
A second exit surface that is continuously arranged adjacent to the first exit surface,
Have,
The first exit surface emits the light forming the first light distribution pattern and the light forming the second light distribution pattern.
The second exit surface emits the light that forms at least the first light distribution pattern.
At least a part of the second exit surface is arranged at a position in front of the tangent line of the first exit surface at the boundary between the first emission surface and the second emission surface. Illumination.
The vehicle headlight according to claim 1, wherein the second incident surface extends from one end of the projection lens to the other end of the projection lens in the left-right direction of the projection lens.
The first or second aspect of the present invention, wherein when the projection lens is viewed in a plan view from the exit surface side, the second exit surface is arranged at a position overlapping at least a part of the second incident surface. Headlights for vehicles.
The incident surface has a plurality of the second incident surfaces.
When the projection lens is viewed in a plan view from the exit surface side, the second exit surface is arranged at a position overlapping at least a part of the second incident surface, and the second incident surface of the other part is arranged. The vehicle headlight according to any one of claims 1 to 3, wherein the headlight is arranged at a position that does not overlap with the headlight.
In the cross section of the projection lens in the vertical direction of the projection lens, the second incident surface is inclined with respect to the central axis direction of the projection lens so as to approach the exit surface toward the lower side of the projection lens. The vehicle headlight according to any one of claims 1 to 4, characterized in that it is a surface.