JP7046730B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp, and in particular, a vehicle lamp capable of suppressing a gentle change in luminous intensity between a low beam light distribution pattern and an ADB light distribution pattern and a decrease in light distribution feeling. Regarding.

Conventionally, a projection lens composed of a first lens and a second lens, a light guide lens arranged behind the projection lens (hereinafter referred to as a separator), and a separator and a projection lens arranged behind the separator are arranged in this order. A vehicle lamp equipped with a low-beam light source that emits light that is transmitted and radiated forward to form a low-beam light distribution pattern (see, for example, Patent Document 1 (FIG. 1 and the like)) has been proposed. The focal plane of the projection lens and the light emitting surface of the separator from which the light from the low beam light source is emitted (and the light entering surface of the projection lens from which the light from the low beam light source emitted from the light emitting surface of the separator is received) are respectively. It is a spherical surface (a spherical surface with a constant curvature) and is in agreement (surface contact).

On the other hand, the present inventors have considered further adding a light source for ADB that emits light that passes through a separator and a projection lens in this order and is irradiated forward to form a light distribution pattern for ADB. The focal plane of the projection lens and the light emission surface of the separator from which the light from the ADB light source is emitted (and the light entrance surface of the projection lens from which the light from the ADB light source is emitted from the light output surface of the separator) are respectively. It is a spherical surface (a spherical surface with a constant curvature) and is in agreement (surface contact).

Japanese Unexamined Patent Publication No. 2015-79660

However, as a result of the study by the present inventors, the light emission of the separator that emits light from the low beam light source and the light emission of the separator that emits light from the ADB light source due to the molding variation of the separator, the temperature change, and the like. It was found that a gap may occur between the surface and the surface, and if a gap occurs, the luminous intensity drops sharply between the low beam light distribution pattern and the ADB light distribution pattern, and the light distribution feeling deteriorates. did.

The present invention has been made in view of the above circumstances, and a gap is formed between the light emitting surface of the separator from which the light from the low beam light source is emitted and the light emitting surface of the separator from which the light from the ADB light source is emitted. Even in such a case, it is desired to provide a vehicle lighting fixture capable of suppressing a decrease in the light distribution feeling due to a gentle change in the luminous intensity between the low beam light distribution pattern and the ADB light distribution pattern. The purpose.

In order to achieve the above object, one aspect of the present invention is a projection lens, a separator arranged behind the projection lens, and a separator arranged behind the separator, and transmits the separator and the projection lens in this order. In a vehicle lamp equipped with a low beam light source that emits light that is emitted forward to form a low beam light distribution pattern, the separator and the projection lens are transmitted in this order and irradiated forward to be irradiated to the ADB. The separator further comprises an ADB light source that emits light forming a light distribution pattern, and the separator includes an upper separator body including a front surface from which light from the low beam light source is emitted, and light from the ADB light source is emitted. The low beam light source and the upper separator body including the lower separator body including the front surface are arranged above the reference axis extending through the focal point of the projection lens and extending in the front-rear direction of the vehicle, and the ADB light source and the lower separator body. The separator body is arranged below the reference axis, the upper portion of the front end portion of the lower separator body includes an overlapping portion extending upward, and the overlap portion is the lower portion of the upper separator body and the lower separator. Light from the ADB light source that includes a gap between the upper part of the main body, a rear surface facing the front surface of the upper separator body, and a front surface facing the rear surface of the projection lens, and enters light into the lower separator body. A part of the light is guided through the overlapped portion while repeating total reflection between the front surface and the rear surface of the overlapped portion to emit light from the front surface of the overlapped portion, and further, for the low beam by the projection lens. It is characterized in that it is projected on the region between the lower part of the light distribution pattern and the upper part of the ADB light distribution pattern.

Further, other aspects of the present invention include a projection lens, a separator arranged behind the projection lens, and a separator arranged behind the separator, and the separator and the projection lens are transmitted in this order and irradiated forward. In a vehicle lamp equipped with a low beam light source that emits light that forms a low beam light distribution pattern, the separator and the projection lens are transmitted in this order and irradiated forward to form an ADB light distribution pattern. Further comprising an ADB light source that emits light, the separator extends from a lower portion of the upper separator body, including a front surface and a rear surface on the opposite side thereof, toward the low beam light source, and at the tip thereof. A lower separator main body including a first light guide portion having a first light entrance surface facing the low beam light source, a front surface and a rear surface on the opposite side thereof, and extending from the upper part of the lower separator main body toward the ADB light source. The projection lens includes a front surface and a rear surface on the opposite side thereof, and the rear surface of the projection lens includes a second light guide portion having a second light entrance surface facing the ADB light source at the tip thereof. The low beam light source, the first light guide unit, the upper separator main body, and the lower light emitting surface including the upper light entering surface facing the front surface of the upper separator main body and the lower light entering surface facing the front surface of the lower separator main body. The upper light entering surface is arranged above the reference axis extending through the focal point of the projection lens and extending in the front-rear direction of the vehicle, respectively, and is the ADB light source, the second light guide portion, the lower separator main body, and the lower entrance. The optical surfaces are respectively arranged below the reference axis, the upper portion of the front end portion of the lower separator body includes an overlapping portion extending upward, and the overlapping portion is the lower portion of the upper separator body and the said. The light from the low beam light source includes a gap between the upper part of the lower separator body, a rear surface facing the front surface of the upper separator body, and a front surface facing the upper light entering surface of the projection lens. Light enters the first light guide portion from the first light entry surface, a part of the light is emitted directly from the front surface of the upper separator body, and another part is between the front surface and the rear surface of the upper separator body. While repeating all reflections, the inside of the upper separator main body is guided, light is emitted from the front surface of the upper separator main body, is transmitted through the overlap portion, and further, light enters the projection lens from the upper light incoming surface of the projection lens. Then, the light is projected by the projection lens and used for forming the low beam light distribution pattern, and the light enters the second light guide portion from the second light incoming surface. A part of the light from the ADB light source is directly emitted from the front surface of the lower separator body, further enters the projection lens from the lower incoming light surface of the projection lens, and is projected by the projection lens. The other part is used to form the light distribution pattern for ADB, and the other part is guided through the overlapped portion while repeating total reflection between the front surface and the rear surface of the overlapped portion to guide the front surface of the overlapped portion. It is characterized in that light is emitted from the light and is further projected by the projection lens into a region between the lower part of the low beam light distribution pattern and the upper part of the ADB light distribution pattern.

Further, other aspects of the present invention include a projection lens, a separator arranged behind the projection lens, and a separator arranged behind the separator, and the separator and the projection lens are transmitted in this order and irradiated forward. In a vehicle lamp equipped with a low beam light source that emits light that forms a low beam light distribution pattern, the separator and the projection lens are transmitted in this order and irradiated forward to form an ADB light distribution pattern. The separator further includes an upper separator body including a front surface where light from the low beam light source is emitted, and a lower separator body including a front surface where light from the ADB light source is emitted. The low beam light source and the upper separator body are arranged above a reference axis that passes through the focal point of the projection lens and extends in the front-rear direction of the vehicle, and the ADB light source and the lower separator body are the reference. The lower portion of the front end portion of the upper separator body, which is arranged below the shaft, includes an overlapping portion extending downward, and the overlap portion is between the lower portion of the upper separator body and the upper portion of the lower separator body. A part of the light from the low beam light source that has entered the upper separator body includes the gap, the rear surface facing the front surface of the lower separator body, and the front surface facing the rear surface of the projection lens. While repeating total reflection between the front surface and the rear surface of the overlap portion, the inside of the overlap portion is guided and light is emitted from the front surface of the overlap portion, and further, the lower portion of the low beam light distribution pattern is formed by the projection lens. It is characterized in that it is projected on the region between the upper part of the light distribution pattern for ADB.

Further, other aspects of the present invention include a projection lens, a separator arranged behind the projection lens, and a separator arranged behind the separator, and the separator and the projection lens are transmitted in this order and irradiated forward. In a vehicle lamp equipped with a low beam light source that emits light that forms a low beam light distribution pattern, the separator and the projection lens are transmitted in this order and irradiated forward to form an ADB light distribution pattern. Further comprising an ADB light source that emits light, the separator extends from a lower portion of the upper separator body, including a front surface and a rear surface on the opposite side thereof, toward the low beam light source, and at the tip thereof. A lower separator main body including a first light guide portion having a first light entrance surface facing the low beam light source, a front surface and a rear surface on the opposite side thereof, and extending from the upper part of the lower separator main body toward the ADB light source. The projection lens includes a front surface and a rear surface on the opposite side thereof, and the rear surface of the projection lens includes a second light guide portion having a second light entrance surface facing the ADB light source at the tip thereof. The low beam light source, the first light guide unit, the upper separator main body, and the lower light emitting surface including the upper light entering surface facing the front surface of the upper separator main body and the lower light entering surface facing the front surface of the lower separator main body. The upper light entering surface is arranged above the reference axis extending through the focal point of the projection lens and extending in the front-rear direction of the vehicle, respectively, and is the ADB light source, the second light guide portion, the lower separator main body, and the lower entrance. The optical surfaces are respectively arranged below the reference axis, the lower portion of the front end portion of the upper separator body includes an overlapping portion extending downward, and the overlapping portion is the lower portion of the upper separator body and the said. The light from the low beam light source includes a gap between the upper part of the lower separator body, a rear surface facing the front surface of the lower separator body, and a front surface facing the lower light entering surface of the projection lens. Light enters the first light guide portion from the first light entry surface, a part of the light is emitted directly from the front surface of the upper separator body, and another part is between the front surface and the rear surface of the upper separator body. While repeating all reflections, the inside of the upper separator main body is guided and light is emitted from the front surface of the upper separator main body, and further, light enters the projection lens from the upper light entering surface of the projection lens and is projected by the projection lens. This is used to form the low beam light distribution pattern, and among the light from the low beam light source that has entered the first light guide portion from the first light incoming surface. A part of the light is guided through the overlap portion while repeating total reflection between the front surface and the rear surface of the overlap portion to emit light from the front surface of the overlap portion, and further, the low beam arrangement is performed by the projection lens. One of the light from the ADB light source that is projected onto the region between the lower part of the light pattern and the upper part of the ADB light distribution pattern and enters the second light guide portion from the second light incoming surface. The portion emits light directly from the front surface of the lower separator main body, passes through the overlap portion, and further enters the projection lens from the lower light entering surface of the projection lens, and is projected by the projection lens. It is characterized in that it is used for forming a light distribution pattern for ADB.

It is a perspective view of a vehicle lamp 10. (A) Top view, (b) Front view, and (c) Side view of the vehicle lamp 10. FIG. 3 is a cross-sectional view of the vehicle lighting tool 10 shown in FIG. 1 cut along a horizontal plane including the reference axis AX (a plane including the X-axis and the Y-axis). FIG. 3 is a cross-sectional view of the vehicle lamp 10 shown in FIG. 1 cut along a vertical surface (a plane including the X-axis and the Z-axis) including the reference axis AX. It is an exploded perspective view of a vehicle lamp 10. It is a perspective view of the structure which combined the heat sink 20, the light source module 30, the holder 40 and the separator 50. It is a perspective view of a separator 50. (A) Partial front view of the upper separator body 52, (b) Partial front view of the lower separator body 53, (c) Front view of a plurality of low beam light sources 32a and a plurality of ADB light sources 32b seeing through the separator 50. (Perspective view). A synthetic light distribution pattern including (a) an example of a low beam light distribution pattern P _Lo , (b) an example of an ADB light distribution pattern P _ADB , and (c) a low beam light distribution pattern P _Lo and an ADB light distribution pattern P _ADB . As an example, (d) is a diagram showing a state in which a plurality of regions (for example, a plurality of regions A1 to A4 that are individually turned on and off) constituting an ADB light distribution pattern are circular and overlap each other. This is an example in which the upper separator main body 52 is omitted and a separator (similar to the light guide lens of the above-mentioned prior art) is used only for the first light guide unit 52d. This is an example of the low beam light distribution pattern P _Lo formed when the upper separator main body 52 is omitted and only the separator of the first light guide unit 52d is used. FIG. 3 is a cross-sectional view of a vehicle lighting tool 10A cut along a vertical surface (a plane including the X-axis and the Z-axis) including the reference axis AX. FIG. 12 is a cross-sectional view taken along the line AA of the vehicle lamp 10A shown in FIG. It is a perspective view of the separator 50A. (A) Top view, (b) Back view, (c) Bottom view, and (d) Side view of the separator 50A. This is an example of the holding structure of the separator 50A and the primary lens 60A. It is a figure for demonstrating the optical path of the light from a low beam light source 32a. This is an example of the low beam light distribution pattern P _Lo formed by the vehicle lamp 10A. (A) An example of an ADB light distribution pattern and a low beam light distribution pattern formed when the separator shown in FIG. 10 (a light guide lens similar to the above-mentioned prior art) is used, (b) the separator shown in FIG. 20 (b). This is an example of an ADB light distribution pattern and a low beam light distribution pattern formed when a light guide lens similar to the conventional technique is used. It is a figure for demonstrating the relationship between the upper light entry surface 60Ab1 and the lower light entry surface 60Ab2 of a primary lens 60A, and the focal plane FP of a projection lens 90. This is a modification of the focal plane FP of the projection lens 90. (A) A diagram for explaining a gap S13 between the front surface 52Aa of the upper separator body 52A and the front surface 53a of the lower separator body 53 from which light emitted from the ADB light source 32b is emitted. It is an example of a synthetic light distribution pattern including a low beam light distribution pattern and an ADB light distribution pattern formed in. It is a partial vertical sectional view of the separator 50B. (A) is a perspective view of the upper separator main body 52B, and (b) is a perspective view of the lower separator main body 53B. This is an example of a synthetic light distribution pattern including a low beam light distribution pattern P _Lo and an ADB light distribution pattern P _ADB formed by a vehicle lamp 10B. It is a partial vertical sectional view of a separator 50B (a modified example). It is a graph showing the luminous intensity distribution of the light emitted from the front surface 52Aa of the upper separator body 52A by being guided inside the upper separator body 52A while repeating total reflection between the front surface 52Aa and the rear surface 52Ab of the upper separator body 52A.

Hereinafter, the vehicle lamp 10 according to the embodiment of the present invention will be described with reference to the accompanying drawings. Corresponding components in each figure are designated by the same reference numerals, and duplicate description is omitted.

FIG. 1 is a perspective view of a vehicle lamp 10. 2A is a top view of the vehicle lamp 10, FIG. 2B is a front view, and FIG. 2C is a side view.

The vehicle lighting fixtures 10 shown in FIGS. 1 and 2 have a low beam light distribution pattern P _Lo (see FIG. 9A) or a low beam light distribution pattern P _Lo and an ADB (Adaptive Driving Beam) light distribution pattern P. It is a vehicle headlight capable of forming a synthetic light distribution pattern including _ADB (see FIG. 9C), and is mounted on the left side and the right side of the front end portion of the vehicle (not shown). The low beam light distribution pattern P _Lo and the ADB light distribution pattern P _ADB are formed on a virtual vertical screen (located about 25 m ahead of the vehicle front) facing the front of the vehicle. Hereinafter, for convenience of explanation, the XYZ axes are defined. The X-axis extends in the vehicle front-rear direction, the Y-axis extends in the vehicle width direction, and the Z-axis extends in the vertical direction.

FIG. 3 is a cross-sectional view of the vehicle lighting tool 10 shown in FIG. 1 cut along a horizontal plane including the reference axis AX (a plane including the X-axis and the Y-axis). FIG. 4 is a cross-sectional view of the vehicle lighting fixture 10 shown in FIG. 1 cut along a vertical surface (a plane including the X-axis and the Z-axis) including the reference axis AX. FIG. 5 is an exploded perspective view of the vehicle lamp 10.

As shown in FIGS. 3 to 5, the vehicle lamp 10 of the present embodiment includes a heat sink 20, a light source module 30, a holder 40, a separator 50, a primary lens 60, a retainer 70, a secondary lens 80, and the like. Although not shown, the vehicle lighting fixture 10 is arranged in a lighting chamber composed of an outer lens and a housing, and is attached to the housing or the like.

As shown in FIG. 5, the heat sink 20 is made of die-cast aluminum and includes a base 22 including a front surface 22a and a rear surface 22b on the opposite side thereof.

The front surface 22a includes a light source module mounting surface 22a1 and a peripheral surface 22a2 surrounding the light source module mounting surface 22a1.

The light source module mounting surface 22a1 and the peripheral surface 22a2 are, for example, planes parallel to a plane including the Y-axis and the Z-axis.

The light source module mounting surface 22a1 is provided with screw holes 22a5 (three places in FIG. 5) for fixing the light source module 30 with screws. Further, the light source module mounting surface 22a1 is provided with positioning pins 22a6 (two locations in FIG. 5) for positioning the light source module 30.

The peripheral surface 22a2 includes a holder contact surface 22a3 with which the holder 40 abuts, and a retainer abutment surface 22a4 with which the retainer 70 abuts.

The retainer contact surface 22a4 is provided on both the left and right sides of the peripheral surface 22a2, respectively.

The thickness between the retainer contact surface 22a4 and the rear surface 22b (thickness in the X-axis direction) is thicker than the thickness between the holder contact surface 22a3 and the rear surface 22b (thickness in the X-axis direction), forming a stepped portion. ing.

The base 22 is provided with screw holes 22c (two places in FIG. 3) into which the screw N1 is inserted. The screw hole 22c penetrates the retainer contact surface 22a4 and the rear surface 22b.

First extension portions 24 extending rearward (in the X-axis direction) from the left and right sides of the base 22 are provided on both the left and right sides of the base 22, respectively. A second extension 26 extending laterally (Y-axis direction) is provided at the tip of the first extension 24.

A heat dissipation fin 28 is provided on the rear surface 22b of the base 22.

The light source module 30 includes a plurality of low beam light sources 32a and a plurality of ADB light sources 32b, and a substrate 34 on which a plurality of low beam light sources 32a, a plurality of ADB light sources 32b, and a connector 34c are mounted.

FIG. 8C is a front view (perspective view) of the plurality of low beam light sources 32a and the plurality of ADB light sources 32b through which the separator 50 is seen through.

As shown in FIG. 8C, the plurality of low beam light sources 32a are mounted on the substrate 34 in the form of being arranged in the upper stage and in the Y-axis direction. The plurality of ADB light sources 32b are mounted on the substrate 34 in a form arranged in the lower stage and in the Y-axis direction.

Each of the light sources 32a and 32b is, for example, a semiconductor light emitting element such as an LED or LD having a rectangular (for example, 1 mm square) light emitting surface, and the substrate 34 with each light emitting surface facing forward (front). Is implemented in. The plurality of rectangles in FIG. 8C represent the light emitting surfaces of the respective light sources 32a and 32b.

The substrate 34 is provided with through holes 34a (two places in FIG. 5) into which the positioning pins 22a6 of the heat sink 20 are inserted, and cutouts S1 (three places in FIG. 5) into which the screws N2 are inserted.

The light source module 30 having the above configuration has the positioning pin 22a6 of the heat sink 20 inserted into the through hole 34a of the substrate 34, and the screw N2 inserted into the notch S1 is screwed into the screw hole 22a5 of the heat sink 20. It is fixed to the heat sink 20 (light source module mounting surface 22a1).

As shown in FIGS. 3 to 5, the holder 40 is made of a synthetic resin such as acrylic or polycarbonate, and includes a cup-shaped holder body 42 that is open on the front side and closed on the rear side.

The front surface 42a of the holder body 42 has a surface (rearly) having a shape in which the rear surface of the separator 50 is inverted so that the rear surface of the separator 50 (the rear surface 52b of the upper separator body 52 and the rear surface 53b of the lower separator body 53) come into surface contact with each other. It is configured as a spherical surface that is concave toward it.

The holder body 42 is provided with a through hole 42c into which the first light guide portion 52d and the second light guide portion 53d of the separator 50 are inserted.

The holder body 42 is provided with a tubular portion 44 extending rearward (in the X-axis direction) from the outer peripheral portion of the holder body 42. A flange portion 46 that abuts on the holder contact surface 22a3 of the heat sink 20 is provided at the tip of the tubular portion 44.

The holder body 42 (and the cylindrical portion 44) is provided with a notch portion S4.

A convex portion 48 and a convex portion 49 are provided on the front side opening end surface 40a of the holder 40.

FIG. 6 is a perspective view of a structure in which a heat sink 20, a light source module 30, a holder 40, and a separator 50 are combined.

FIG. 7 is a perspective view of the separator 50.

As shown in FIG. 7, the separator 50 is made of silicon resin and is a cup-shaped member having an opening on the front side and a closure on the rear side. The separator 50 includes an upper separator main body 52 and a lower separator main body 53.

As shown in FIG. 4, the upper separator main body 52 is arranged above the reference axis AX, and the lower separator main body 53 is arranged below the reference axis AX. The reference axis AX extends in the X-axis direction.

The front surface 52a of the upper separator main body 52 has an upper half of the rear surface 60b of the primary lens 60 so that the upper half of the rear surface 60b (spherical surface convex toward the rear) of the primary lens 60 is in surface contact with the reference axis AX. It is configured as a surface with an inverted shape (a spherical surface that is concave toward the rear).

The rear surface 52b (see FIGS. 3 and 4) of the upper separator body 52 is in surface contact with the upper half of the front surface 42a (the spherical surface concave toward the front) of the holder 40 (holder body 42) with respect to the reference axis AX. The upper half of the front surface 42a of the holder 40 (holder body 42) is configured as an inverted surface (a spherical surface convex toward the rear).

As shown in FIG. 8A, the lower end edge of the front surface 52a of the upper separator main body 52 has a stepped edge portion 52a1 having a shape corresponding to the cut-off line CL _Lo (CL1 to CL3) and a stepped edge portion 52a1. Includes extended edge portions 52a2 and 52a3 arranged on both sides. The extension edge portion may be provided on only one side.

The stepped edge portion 52a1 has an edge e1 corresponding to the left horizontal cut offline CL1, a side e2 corresponding to the right horizontal cut offline CL2, and an oblique cut offline CL3 connecting the left horizontal cut offline CL1 and the right horizontal cut offline CL2. Includes the side e3 corresponding to.

The extension edge portion 52a2 is arranged at the same position as the side e1 in the Z-axis direction. The extension edge portion 52a3 is arranged at the same position as the side e2 in the Z-axis direction.

The lower end surface 52c (see FIG. 4) of the upper separator main body 52 is a surface extending in the horizontal direction (X-axis direction) from the lower end edge of the front surface 52a of the upper separator main body 52 toward the rear surface 52b of the upper separator main body 52.

As shown in FIGS. 3 and 4, a first light guide unit 52d is provided on the rear surface 52b of the upper separator main body 52 in order to guide the light from the light source module 30 (a plurality of low beam light sources 32a). .. The base end portion of the first light guide portion 52d is provided in a part of the rear surface 52b of the upper separator main body 52 including the stepped edge portion 52a1, and is provided in the light source module 30 (a plurality of low beam light sources 32a). It extends toward. A part of the region including the stepped edge portion 52a1 is a region of the rear surface 52b of the upper separator main body 52 where the light source module 30 (light emitting surface of the plurality of low beam light sources 32a) faces. The first light guide portion 52d is inserted into the through hole 42c of the holder 40.

A first light entrance surface 52e is provided at the tip of the first light guide portion 52d. The first light receiving surface 52e is, for example, a plane parallel to a plane including the Y-axis and the Z-axis.

The first light entry surface 52e is arranged at a position facing the light source module 30 (light emitting surface of a plurality of low beam light sources 32a) with the first light guide portion 52d inserted into the through hole 42c of the holder 40. (See FIG. 4). The distance between the first light input surface 52e and the light source module 30 (light emitting surface of the plurality of low beam light sources 32a) is, for example, 0.2 mm.

As shown in FIGS. 5 and 7, a flange portion 52f is provided on the front opening end surface of the upper separator main body 52. In the flange portion 52f, a through hole 52f1 (one location in FIGS. 5 and 7) into which the convex portion 48 of the holder 40 is inserted, and a through hole 52f2 (FIG. 5, FIG. 7) into which the convex portion 49 of the holder 40 is inserted are inserted. 2 places in the middle) are provided.

The front surface 53a of the lower separator body 53 has a lower half of the rear surface 60b of the primary lens 60 so that the lower half of the rear surface 60b (spherical surface convex toward the rear) of the primary lens 60 is in surface contact with the reference axis AX. It is configured as a surface with an inverted shape (a spherical surface that is concave toward the rear).

The rear surface 53b (see FIGS. 3 and 4) of the lower separator body 53 is in surface contact with the lower half of the front surface 42a (the spherical surface concave toward the front) of the holder 40 (holder body 42) with respect to the reference axis AX. The lower half of the front surface 42a of the holder 40 (holder body 42) is configured as an inverted surface (a spherical surface convex toward the rear).

As shown in FIG. 8B, the upper end edge of the front surface 53a of the lower separator main body 53 has a stepped edge portion 53a1 (sides e1'to e3') in which the stepped edge portion 52a1 is inverted, and a stepped edge portion 53a1. Includes extended edge portions 53a2 and 53a3 arranged on both sides of the edge portion 53a1. The extension edge portion may be provided on only one side.

The extension edge portion 53a2 is arranged at the same position as the side e1'in the Z-axis direction. The extension edge portion 53a3 is arranged at the same position as the side e2'in the Z-axis direction.

The upper end surface 53c (see FIG. 4) of the lower separator main body 53 is a surface extending in the horizontal direction (X-axis direction) from the upper end edge of the front surface 53a of the lower separator main body 53 toward the rear surface 53b of the lower separator main body 53.

As shown in FIGS. 3 and 4, a second light guide unit 53d is provided on the rear surface 53b of the lower separator main body 53 in order to guide the light from the light source module 30 (a plurality of ADB light sources 32b). .. The base end portion of the second light guide portion 53d is provided in a part of the rear surface 53b of the lower separator main body 53 including the stepped edge portion 53a1, and is provided in the light source module 30 (plural ADB light sources 32b). It extends toward. The partial region including the stepped edge portion 53a1 is a region of the rear surface 53b of the lower separator main body 53 where the light source modules 30 (light emitting surfaces of the plurality of ADB light sources 32b) face each other. The second light guide portion 53d is inserted into the through hole 42c of the holder 40.

A second light entrance surface 53e is provided at the tip of the second light guide portion 53d. In the second light input surface 53e, a plurality of regions (for example, a plurality of regions A1 to A4 that are individually turned on and off) constituting the light distribution pattern for ADB form a circle as shown in FIG. 9D and mutually. It is a surface adjusted so as to be formed in a state of being divided by vertical edges as shown in FIG. 9 (b). Note that FIGS. 9 (b) and 9 (d) represent ADB light distribution patterns formed when a plurality of ADB light sources 32b are four. The hatched area in FIGS. 9 (b) and 9 (d) indicates that the ADB light source 32b corresponding to the area is turned off.

The second light entry surface 53e is arranged at a position facing the light source module 30 (light emitting surface of a plurality of ADB light sources 32b) with the second light guide portion 53d inserted into the through hole 42c of the holder 40. (See FIG. 4). The distance between the second light input surface 53e and the light source module 30 (light emitting surface of the plurality of ADB light sources 32b) is, for example, 0.2 mm.

As shown in FIGS. 5 and 7, a flange portion 53f is provided on the front opening end surface of the lower separator main body 53. The flange portion 53f is provided with through holes 53f1 (two locations in FIGS. 5 and 7) into which the convex portion 48 of the holder 40 is inserted.

The lower separator main body 53 is provided with a notch portion S5 so that the connector 34c of the light source module 30 does not abut (interfere) with the lower separator main body 53.

As shown in FIG. 8C, in the upper separator main body 52 and the lower separator main body 53, the lower end edge of the front surface 52a of the upper separator main body 52 and the upper end edge of the front surface 53a of the lower separator main body 53 are in line contact with each other. The lower end surface 52c of the upper separator main body 52 and the upper end surface 53c of the lower separator main body 53 are combined in a surface contact state to form the separator 50.

In the separator 50 having the above configuration, the first light source portion 52d of the upper separator main body 52 and the second light source portion 53d of the lower separator main body 53 are inserted (for example, press-fitted or fitted) into the through hole 42c of the holder 40, and the upper The first light incoming surface 52e of the separator main body 52 (first light guide unit 52d) and the light source module 30 (light emitting surface of a plurality of low beam light sources 32a) face each other, and the lower separator main body 53 (second light guide unit 53d) The second light input surface 53e and the light source module 30 (light emitting surfaces of a plurality of ADB light sources 32b) face each other (see FIGS. 3 and 4), and the rear surface of the separator 50 (the rear surface 52b of the upper separator main body 52 and). The rear surface 53b) of the lower separator body 53) is arranged in a state of being in surface contact (see FIGS. 3 and 4) with the front surface 42a of the holder 40 (holder body 42).

At that time, the convex portion 48 of the holder 40 is inserted into the through hole 52f1 of the upper separator main body 52 and the through hole 53f1 of the lower separator main body 53 (see FIG. 6). Further, the convex portion 49 of the holder 40 is inserted into the through hole 52f2 of the upper separator main body 52 (see FIG. 6).

As shown in FIG. 5, the primary lens 60 is a spherical lens including a front surface 60a and a rear surface 60b on the opposite side thereof. The front surface 60a is a spherical surface convex toward the front, and the rear surface 60b is a spherical surface convex toward the rear. The primary lens 60 is provided with a flange portion 62. The flange portion 62 extends between the front surface 60a and the rear surface 60b so as to surround the reference axis AX.

As shown in FIG. 5, the retainer 70 is made of a synthetic resin such as acrylic or polycarbonate, and includes a retainer main body 72 which is a tubular body that widens in a pyramidal shape from the front opening end face toward the rear opening end face.

As shown in FIG. 5, the secondary lens 80 is made of a synthetic resin such as acrylic or polycarbonate and includes a lens body 82.

The lens body 82 includes a front surface 82a and a rear surface 82b on the opposite side thereof (see FIGS. 3 and 4). The front surface 82a is a plane parallel to the plane including the Y-axis and the Z-axis, and the rear surface 82b is a spherical surface convex toward the rear.

A tubular portion 84 extending rearward (in the X-axis direction) from the outer peripheral portion of the lens main body 82 is provided on the outer peripheral portion of the lens main body 82.

In the primary lens 60 and the secondary lens 80, the focal point F (see FIG. 8C) is the lower end edge (stepped edge portion 52a1) of the front surface 52a of the upper separator body 52 and the upper end edge (stepped edge) of the front surface 53a of the lower separator body 53. Attached edge portion 53a1) Constructs a projection lens located in the vicinity. The curvature of field (rear focal plane) of this projection lens is formed on the lower end edge (stepped edge portion 52a1) of the front surface 52a of the upper separator body 52 and the upper end edge (stepped edge portion 53a1) of the front surface 53a of the lower separator body 53. It is almost the same.

As the primary lens 60 and the secondary lens 80 constituting this projection lens, for example, the spherical lens and the plano-convex lens described in Japanese Patent Application Laid-Open No. 2015-79660 can be used.

The secondary lens 80 having the above configuration is arranged in a state where the lens body 82 is arranged in front of the primary lens 60 and the holding portion / screw receiving portion 86 is in contact with the flange portion 76 of the retainer 70 (FIGS. 3 and 3). See FIG. 4).

In the vehicle lamp 10 having the above configuration, when the plurality of low beam light sources 32a are turned on, the light from the plurality of low beam light sources 32a is emitted from the first light input surface 52e of the first light guide portion 52d of the upper separator main body 52. Light enters from, is guided through the first light source portion 52d, and emits light from the front surface 52a of the upper separator main body 52. As a result, a luminous intensity distribution corresponding to the low beam light distribution pattern is formed on the front surface 52a of the upper separator main body 52. This luminous intensity distribution includes sides e1 to e3 (see FIG. 8A) corresponding to the cut-off line CL _Lo (CL1 to CL3). The projection lens composed of the primary lens 60 and the secondary lens 80 reversely projects this luminous intensity distribution forward. As a result, as shown in FIG. 9A, a low beam light distribution pattern P _Lo including cut-off line CL (CL1 to CL3) is formed on the upper end edge.

When the plurality of ADB light sources 32b are turned on, the light from the plurality of ADB light sources 32b enters from the second light inlet surface 53e of the second light guide unit 53d of the lower separator main body 53, and the light enters from the second light guide unit 53d. The inside is guided and light is emitted from the front surface 53a of the lower separator main body 53. As a result, a luminous intensity distribution corresponding to the ADB light distribution pattern is formed on the front surface 53a of the lower separator main body 53. This luminous intensity distribution includes sides e1'to e3' (see FIG. 8B) corresponding to the cut-off line CL _ADB (CL1'to CL3'). The projection lens composed of the primary lens 60 and the secondary lens 80 reversely projects this luminous intensity distribution forward. As a result, as shown in FIG. 9B, a light distribution pattern P _ADB for ADB including a cut-off line CL _ADB (CL1'to CL3') is formed at the lower end edge. Note that FIG. 9B shows an ADB light distribution pattern P _ADB formed when a plurality of ADB light sources 32b are four. The hatched area in FIG. 9B indicates that the ADB light source 32b corresponding to the area is turned off.

When the plurality of low beam light sources 32a and the plurality of ADB light sources 32b are turned on, a synthetic light distribution pattern including the low beam light distribution pattern P _Lo and the ADB light distribution pattern P _ADB is formed as shown in FIG. 9 (c). Will be done.

As a result of the examination by the present inventors, the vehicle lamp 10 having the above configuration satisfies the regulations required for the low beam light distribution pattern, but is a part of the low beam light distribution pattern (for example, around 4 degrees below the horizon). It has been found that the luminous intensity of the light is relatively high, causing, for example, uneven luminous intensity (uneven brightness), and as a result, the light distribution feeling is deteriorated.

The reason why the luminous intensity of a part of the low beam light distribution pattern (for example, around 4 degrees below the horizon) is high is that the light from the low beam light source 32a has a relatively strong luminous intensity (for example, the low beam light source 32a). Light in the narrow angle direction with respect to the optical axis _{AX 32a} (see FIG. 4) of This is due to being projected (or projected) at (around 4 degrees).

FIG. 10 shows an example in which the upper separator main body 52 is omitted and a separator (a light guide lens similar to the above-mentioned prior art) is used only for the first light guide unit 52d.

As shown in FIG. 10, when the upper separator main body 52 is omitted and a separator having only the first light guide portion 52d is used as the separator 50, a part of the low beam light distribution pattern P _Lo (for example, 4 below the horizontal line). In addition to the relatively high luminous intensity (near the degree), as shown in FIG. 11, the thickness TC at the center of the low beam light distribution pattern P _Lo is thinner than the thickness TL and TR on both the left and right sides. As a result, it was found that the light distribution feeling was lowered. FIG. 11 is an example of a low beam light distribution pattern P _Lo formed when the upper separator main body 52 is omitted and a separator having only the first light guide portion 52d is used.

The detailed reason why the thickness TC at the center of the low beam light distribution pattern P _Lo is thinner than the thickness TL and TR on both the left and right sides is unknown, but it can be considered as follows.

That is, first, the thickness of the upper separator main body 52 along the reference axis AX becomes thicker as the distance from the reference axis AX increases in the horizontal direction (see the thicknesses T1 and T2 in FIG. 3), and secondly, the upper Since the light from the low beam light source 32a that passes through the thick portion of the separator main body 52 has a longer optical path length in the upper separator main body 52, it is largely diffused in the vertical direction from the front surface 52a of the upper separator main body 52. It is thought that it is due to the light emission.

For example, in the upper separator main body 52, a portion far from the reference axis AX (for example, refer to the portion of the thickness T2 in FIG. 3) is a portion near the reference axis AX (for example, refer to the portion of the thickness T1 in FIG. 3). ) Is thicker. Therefore, the light from the low beam light source 32a that passes through the portion of the upper separator main body 52 that is far from the reference axis AX (see, for example, the portion of the thickness T2 in FIG. 3) is near the reference axis AX (for example). Since the optical path length in the upper separator main body 52 is longer than that of the light from the low beam light source 32a transmitted through the portion of the thickness T1 in FIG. 3, it is largely diffused in the vertical direction and the front surface of the upper separator main body 52. Light is emitted from 52a. As a result, it is considered that the thickness TC of the central portion of the low beam light distribution pattern P _Lo is thinner than the thickness TL and TR on both the left and right sides.

Further, as examined by the present inventors, the low beam light distribution pattern has a longer vertical length, a lower density (narrower bright range), and a lower maximum light intensity than the ADB light distribution pattern. However, as shown in FIG. 10, the focal plane FP of the projection lens 90 and the low beam emitted from the front surface 52a of the separator 50 from which the light emitted from the low beam light source 32a is emitted (and the low beam emitted from the front surface 52a of the separator 50). The rear surface 60b of the primary lens 60 into which the light from the light source 32a enters is spherical (a spherical surface having a constant curvature) and coincides with each other (surface contact), and the focal plane FP of the projection lens 90 and the light source for ADB. The front surface 53a of the separator 50 from which the light from the 32b is emitted (and the rear surface 60b of the primary lens 60 from which the light from the ADB light source 32b which is emitted from the front surface 53a of the separator 50 is emitted) are spherical (a spherical surface having a constant curvature). In the case of coincidence (surface contact), as shown in FIG. 19A, the low beam light distribution pattern P _Lo and the ADB light distribution pattern P _ADB have a vertically symmetrical shape and light intensity distribution, and are obtained above. It was found that the low beam light distribution pattern could not be formed. It was also found that the outline of the light distribution pattern for ADB became clear and the light distribution feeling was deteriorated. FIG. 19A is an example of an ADB light distribution pattern and a low beam light distribution pattern formed when the separator shown in FIG. 10 (a light guide lens similar to the above-mentioned prior art) is used.

Next, as the second embodiment, the light distribution pattern for low beam, which has a longer vertical length, a lower density (narrower bright range), and a lower maximum luminous intensity than the light distribution pattern for ADB, and the contour are A vehicle lamp 10A capable of forming an appropriately blurred light distribution pattern for ADB will be described.

Compared with the vehicle lamp 10 of the first embodiment, the vehicle lamp 10A of the present embodiment uses the separator 50A instead of the separator 50, and uses the primary lens 60A instead of the primary lens 60. It's different. Other than that, the configuration is the same as that of the first embodiment. Hereinafter, the differences from the first embodiment will be mainly described, and the same reference numerals will be given to the same configurations, and the description thereof will be omitted as appropriate.

FIG. 12 is a cross-sectional view of the vehicle lamp 10A cut along a vertical surface (a plane including the X-axis and the Z-axis) including the reference axis AX. FIG. 13 is a cross-sectional view taken along the line AA of the vehicle lamp 10A shown in FIG. In FIGS. 12 and 13, the heat sink 20, the holder 40, the retainer 70, and the like are omitted.

As shown in FIGS. 12 and 13, the vehicle lighting equipment 10A includes a secondary lens 80, a primary lens 60A arranged behind the secondary lens 80, a separator 50A arranged behind the primary lens 60A, and a separator 50A. A plurality of low beam light sources 32a (hereinafter, simply low beams) that are arranged behind the above and emit light that passes through the separator 50A, the primary lens 60A, and the secondary lens 80 in this order and is irradiated forward to form a low beam light distribution pattern. A plurality of ADB light sources 32b (hereinafter, simply referred to as “ADB light sources 32a”) that emit light that passes through the separator 50A, the primary lens 60A, and the secondary lens 80 in this order and is irradiated forward to form an ADB light distribution pattern. ADB light source 32b) and.

The low beam light source 32a, the ADB light source 32b, the separator 50A, the primary lens 60A, and the secondary lens 80 are held by the heat sink 20, the holder 40, the retainer 70, and the like as in the first embodiment, so that the positional relationship shown in FIG. Is kept.

The secondary lens 80 (front surface 82a and rear surface 82b) and the primary lens 60A (front surface 60a) constitute the projection lens 90. Specifically, the projection lens 90 is the rear surface of the rearmost lens (primary in the present embodiment) of one or a plurality of lenses (primary lens 60A, secondary lens 80 in the present embodiment). It is composed of optical surfaces other than the rear surface 60Ab of the lens 60A (in the present embodiment, the front surface 60a of the primary lens 60A, the front surface 82a and the rear surface 82b of the secondary lens 80). The focal plane FP of the projection lens 90 is, for example, a spherical surface having a constant curvature (see FIG. 20).

As shown in FIG. 12, the focal point F of the projection lens 90 is located between the lower end edge of the front surface 52Aa of the upper separator body 52A and the upper end edge of the front surface 53a of the lower separator body 53 in the vertical direction. Although not shown, the focal point F of the projection lens 90 is located at the center of the lower end edge of the front surface 52Aa of the upper separator body 52A (and the upper end edge of the front surface 53a of the lower separator body 53) in the horizontal direction. The reference axis AX passes through the focal point F and extends in the vehicle front-rear direction (X direction).

14 is a perspective view of the separator 50A, FIG. 15A is a top view of the separator 50A, FIG. 15B is a rear view, FIG. 15C is a bottom view, and FIG. 15D is a side view.

The separator 50A is made of silicon resin and is a cup-shaped member having an opening on the front side and a closed side on the rear side, as shown in FIG. 14 and the like.

As shown in FIG. 12, the separator 50A includes an upper separator main body 52A, a first light guide portion 52d, a first extension portion 54, a second extension portion 55, a lower separator main body 53, and a second light guide portion. The 53d and the flange portion 56 are included, and these are configured as one integrally molded component.

The upper separator body 52A is arranged above the reference axis AX, and the lower separator body 53 is arranged below the reference axis AX.

The upper separator main body 52A is a thin plate-shaped light guide portion including a front surface 52Aa and a rear surface 52Ab on the opposite side thereof. Specifically, the upper separator main body 52A is curved along the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A in the horizontal cross section (see FIG. 13), and extends upward in the vertical cross section. (See FIG. 12) It is a thin plate-shaped light guide unit. The lower end edge of the front surface 52Aa of the upper separator main body 52A includes a stepped edge portion 52a1 (not shown in FIG. 12) having a shape corresponding to the cut-off line CL _Lo (CL1 to CL3), as in the first embodiment.

As shown in FIG. 12 and the like, the upper separator main body 52A is arranged with the front surface 52Aa facing the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A.

The lower portion of the front surface 52Aa of the upper separator main body 52A is in surface contact with the lower portion of the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A. Further, a space S is formed between a portion above the lower portion of the front surface 52Aa of the upper separator main body 52A and a portion above the lower portion of the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A.

The distance (space S) between the front surface 52Aa of the upper separator main body 52A and the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A becomes wider toward the upper side. The relationship between the front surface 52Aa of the upper separator main body 52A and the rear focal plane FP (curvature of field; see FIG. 12) of the projection lens 90 is also the same.

Since the light from the low beam light source 32a emitted from the first light guide portion 52d (front surface 52Aa) of the upper separator main body 52A becomes diffused light, it reaches the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A. The light becomes weaker as the distance (space S) between the front surface 52Aa of the upper separator main body 52A and the rear surface 60Ab (upper light source surface 60Ab1) of the primary lens 60A becomes wider (that is, as it goes upward from the reference axis AX). Become. As a result, the low beam light distribution pattern has an ideal luminous intensity distribution that decreases in a gradation pattern from the upper end edge toward the lower side.

The vertical length H1 (see FIG. 12) of the portion (surface contact portion) in which the lower portion of the front surface 52Aa of the upper separator main body 52A and the lower portion of the rear surface 60b (upper light incident surface 60Ab1) of the primary lens 60A are in surface contact is For example, it is 0.7 mm. By providing this surface contact portion, it is possible to form a high luminous intensity band having a relatively high luminous intensity in the vicinity of the cutoff line of the low beam light distribution pattern. Further, by adjusting the length H1, the vertical length of the high luminous intensity band can be adjusted.

The front surface 52Aa of the upper separator body 52A receives light from the low beam light source 32a that is guided through the upper separator body 52A while repeating total reflection between the front surface 52Aa and the rear surface 52Ab of the upper separator body 52A. For example, it is configured as a curved surface slightly convex toward the front so that light is emitted from the front surface 52Aa of the 52A (see FIG. 17). Similarly, the rear surface 52Ab of the upper separator main body 52A is also configured as a curved surface slightly convex toward the front.

The thickness T (see FIG. 12) of the upper separator main body 52A is, for example, 2 mm in consideration of moldability and the like. Further, the vertical length H2 (see FIG. 12) of the upper separator main body 52A is, for example, 7 mm in consideration of the vertical length (thickness) of the low beam light distribution pattern. By adjusting the length H2, the vertical length of the low beam light distribution pattern can be adjusted.

As shown in FIG. 12, the first light guide portion 52d is a thin plate-shaped light guide portion including the upper surface 52d1 and the lower surface 52d2 on the opposite side thereof. The first light guide portion 52d extends from the lower portion of the upper separator main body 52A (rear surface 52Ab) toward the low beam light source 32a, and has a first light input surface 52e facing the low beam light source 32a at the tip end. The first light entry surface 52e is a surface on which light from the low beam light source 32a enters the separator 50A (first light guide unit 52d), for example, a plane parallel to a plane including the Y axis and the Z axis. be.

The first extension portion 54 and the second extension portion 55 are so-called connecting portions for which the optical function is not intended. The first extension portion 54 extends forward from the upper end portion of the upper separator main body 52A. The second extension portion 55 extends from the front end portion of the first extension portion 54 along the rear surface 60Ab of the primary lens 60A.

The lower separator main body 53 is a thin plate-shaped light guide portion including a front surface 53a and a rear surface 53b on the opposite side thereof. Similar to the first embodiment, the upper end edge of the front surface 53a of the lower separator main body 53 includes the stepped edge portion 53a1 (not shown in FIG. 12) in which the stepped edge portion 52a1 is inverted.

The second light guide portion 53d extends from the upper portion of the lower separator main body 53 (rear surface 53b) toward the ADB light source 32b, and has a second light input surface 53e at the tip thereof with the ADB light source 32b facing. The second light entry surface 53e is a surface on which light from the ADB light source 32b enters the separator 50A (second light guide unit 53d), for example, a plane parallel to a plane including the Y axis and the Z axis. be.

FIG. 16 is an example of the holding structure of the separator 50A and the primary lens 60A.

As shown in FIG. 16, the separator 50A having the above configuration is sandwiched between the holder 40 and the retainer 70 together with the primary lens 60A. Specifically, the first light guide unit 52d and the second light guide unit 53d are inserted into the through hole 42c of the holder 40, and the first light entry surface 52e and the low beam light source 32a (light emitting surface) face each other, and the first 2 With the light input surface 53e and the ADB light source 32b (light emitting surface) facing each other and the rear surface (rear surface 52Ab, 53b, etc.) of the separator 50A in surface contact with the front surface 42a of the holder 40 (holder body 42). It is sandwiched between the holder 40 and the retainer 70 together with the primary lens 60A.

The primary lens 60A is made of a transparent resin such as acrylic or polycarbonate, and as shown in FIG. 12, is a spherical lens including a front surface 60a and a rear surface 60Ab on the opposite side thereof. The front surface 60a is a spherical surface convex toward the front, and the rear surface 60Ab is a spherical surface convex toward the rear. The primary lens 60A is provided with a flange portion 62. The flange portion 62 extends between the front surface 60a and the rear surface 60Ab so as to surround the reference axis AX.

The rear surface 60Ab of the primary lens 60A includes an upper light entering surface 60Ab1 arranged above the reference axis AX and a lower light entering surface 60Ab2 arranged below the reference axis AX.

The upper light entering surface 60Ab1 is a surface on which light emitted from the low beam light source 32a emitted from the front surface 52Aa of the upper separator main body 52A enters the primary lens 60A. The upper light entering surface 60Ab1 is provided in a region of the rear surface 60Ab of the primary lens 60A where the front surface 52Aa of the upper separator main body 52A faces.

The lower portion of the upper light surface 60Ab1 coincides with the rear focal plane FP of the projection lens 90. On the other hand, the portion above the lower portion of the upper light entering surface 60Ab1 does not coincide with the rear focal plane FP of the projection lens 90 and is inclined forward with respect to the rear focal plane FP.

The surface shape of the headlight surface 60Ab1 satisfies the regulations required for the low beam light distribution pattern, and the luminous intensity of a part of the low beam light distribution pattern (for example, around 4 degrees below the horizontal line) is relatively high. It is adjusted so that it can be suppressed and the thickness in the vertical direction becomes uniform in the horizontal direction (that is, it is possible to suppress the deterioration of the light distribution feeling). For example, the surface shape of the upper light input surface 60Ab1 is adjusted so that the luminous intensity distribution of the low beam light distribution pattern decreases in a gradation manner from the upper end edge of the low beam light distribution pattern downward. The surface shape of the front surface 52Aa of the upper separator main body 52A may be adjusted in the same manner. In addition, in this specification, "uniformity" is not limited to uniformity in a strict sense. That is, it is "uniform" as long as it can be visually evaluated as uniform or substantially uniform.

Since the surface shape of the upper light incoming surface 60Ab1 adjusted in this way is a complicated free curved surface, it is difficult to express the surface shape of the upper light incoming surface 60Ab1 with a specific numerical value or the like.

However, for example, by adjusting the surface shape of the upper light entering surface 60Ab1 using predetermined simulation software and confirming the low beam light distribution pattern (luminous intensity distribution, etc.) each time the adjustment is made, the low beam light distribution is performed. Satisfying the regulations required for the pattern, it is possible to suppress the relatively high luminous intensity of a part of the low beam light distribution pattern (for example, around 4 degrees below the horizon), and the thickness in the vertical direction with respect to the horizontal direction is increased. It is possible to find the surface shape of the upper light input surface 60Ab1 on which the low beam light distribution pattern that becomes uniform (that is, it is possible to suppress the deterioration of the light distribution feeling) is formed.

The lower light entry surface 60Ab2 is a surface on which light emitted from the ADB light source 32b emitted from the front surface 53a of the lower separator main body 53 enters the primary lens 60A. The lower light entering surface 60Ab2 is provided in a region of the rear surface 60Ab of the primary lens 60A where the front surface 53a of the lower separator main body 53 faces. The lower light surface 60Ab2 coincides with the rear focal plane FP of the projection lens 90.

As shown in FIG. 16, the primary lens 60A having the above configuration is sandwiched between the holder 40 and the retainer 70 together with the separator 50A. Specifically, the flange portion 62 is in contact with the flange portion 56 of the separator 50A, a part of the rear surface 60Ab is in surface contact with the second extension portion 55 of the separator 50A, and the lower portion of the rear surface 60Ab (upper light receiving surface 60Ab1) is in contact with the flange portion 56. The lower surface of the upper separator body 52A is in surface contact with the lower portion of the front surface 52Aa, the rear surface 60Ab (lower light incident surface 60Ab2) is in surface contact with the front surface 53a of the lower separator body 53, and the front surface 52Aa of the upper separator body 52 and the primary lens 60A are in surface contact with each other. A space S is formed between the rear surface 60Ab (upper light input surface 60Ab1), and is sandwiched between the holder 40 and the retainer 70 together with the separator 50A.

FIG. 20 is a diagram for explaining the relationship between the upper light entering surface 60Ab1 and the lower light entering surface 60Ab2 of the primary lens 60A and the focal plane FP of the projection lens 90.

As shown in FIG. 20, the lower part of the upper light surface 60Ab1 of the primary lens 60A and the upper part of the lower light surface 60Ab2 of the primary lens 60A are set as the first region B1, and above the lower part of the upper light surface 60Ab1 of the primary lens 60A. The first region B1 corresponds to the focal plane FP of the projection lens 90, when the portion of is the second region B2 and the portion below the upper part of the lower light surface 60Ab2 of the primary lens 60A is the third region B3. The second region B2 is arranged forward (or backward) with respect to the focal plane FP of the projection lens 90, and the third region B3 is arranged rearward (or forward) with respect to the focal plane FP of the projection lens 90. There is.

The distance between the second region B2 and the focal plane FP of the projection lens 90 increases upward from the reference axis AX. On the other hand, the distance between the third region B3 and the focal plane FP of the projection lens 90 increases downward from the reference axis AX.

By adjusting the first region B1, the high luminous intensity in the vicinity of the cut-off line of the low beam light distribution pattern and the high luminous intensity in the vicinity of the lower end edge of the ADB light distribution pattern are relatively high. The vertical length of the band can be adjusted. Further, by adjusting the second region B2, the vertical length of the low beam light distribution pattern can be adjusted. Further, by adjusting the third region B3, the vertical length of the light distribution pattern for ADB can be adjusted.

The secondary lens 80 is a plano-convex lens made of a transparent resin such as acrylic or polycarbonate and including a front surface 82a and a rear surface 82b on the opposite side thereof. The front surface 82a is a plane parallel to the plane including the Y-axis and the Z-axis, and the rear surface 82b is a spherical surface convex toward the rear.

FIG. 17 is a diagram for explaining an optical path of light from the low beam light source 32a.

In the vehicle lamp 10A having the above configuration, when the low beam light source 32a is turned on, the light from the low beam light source 32a enters the separator 50A (first light guide unit 52d) from the first light entry surface 52e.

As shown in FIG. 17, among the light from the low beam light source 32a that has entered the separator 50A (first light guide unit 52d), some of the light, for example, the light Ray1 having a relatively strong luminosity (for example, the low beam). The light in the narrow angle direction with respect to the optical axis AX _32a of the light source 32a) emits light directly from the lower part of the front surface 52Aa of the upper separator main body 52A, and further enters the primary lens 60A from the upper light entering surface 60Ab1 of the primary lens 60A. It shines and is projected by a projection lens 90 composed of a primary lens 60A and a secondary lens 80 to be used for forming a low beam light distribution pattern.

Further, among the light from the low beam light source 32a that has entered the separator 50A (first light guide unit 52d), some other light, for example, the light Ray2 having a relatively weak light intensity (for example, the low beam light source 32a). Light in the wide angle direction with respect to the optical axis AX _32a ) is guided through the upper separator body 52A while repeating total reflection between the front surface 52Aa and the rear surface 52Ab of the upper separator body 52A, and the front surface of the upper separator body 52A. A low beam light distribution pattern is emitted from 52Aa, further enters the primary lens 60A from the upper light entering surface 60Ab1 of the primary lens 60A, and is projected by the projection lens 90 composed of the primary lens 60A and the secondary lens 80. Used for the formation of. FIG. 27 is a graph showing the luminous intensity distribution of light emitted from the front surface 52Aa of the upper separator body 52A by being guided inside the upper separator body 52A while repeating total reflection between the front surface 52Aa and the rear surface 52Ab of the upper separator body 52A. Is.

As shown in FIG. 18, the present inventors satisfy the regulations required for the low beam light distribution pattern, and the low beam light distribution pattern formed as described above satisfies a part of the low beam light distribution pattern (for example,). , Around 4 degrees below the horizon H) can be suppressed from becoming relatively high, and the thickness in the vertical direction becomes uniform in the horizontal direction (that is, the thickness TC, TL, and TR become uniform). It was confirmed that the decrease in optical feeling can be suppressed). FIG. 18 is an example of the low beam light distribution pattern P _Lo formed by the vehicle lamp 10A.

The detailed reason why the luminous intensity of a part of the low beam light distribution pattern (for example, around 4 degrees below the horizon) does not increase is unknown, but it can be considered as follows.

That is, since the space S is formed between the front surface 52Aa of the upper separator main body 52A and the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A, light enters the separator 50A (first light guide unit 52d). Of the light from the low beam light source 32a, the light Ray1 having a relatively strong luminosity is emitted from the front surface 52Aa of the upper separator main body 52A and from the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A to the primary lens 60A. When light enters, they are refracted (diffused) and further reflected by Fresnel. As a result, it is considered that the light directed to a part of the low beam light distribution pattern (for example, around 4 degrees below the horizon) is reduced.

The detailed reason why the thickness in the vertical direction is uniform in the horizontal direction is unknown, but it can be considered as follows.

That is, since the space S is formed between the front surface 52Aa of the upper separator main body 52A and the rear surface 60Ab (upper light receiving surface 60Ab1) of the primary lens 60A, light enters the separator 50A (first light guide unit 52d). Of the light from the low beam light source 32a, the light Ray1 having a relatively strong luminosity is refracted (diffused) when it enters the primary lens 60A from the rear surface 60Ab (upper incoming light surface 60Ab1) of the primary lens 60A. It is considered that a part of the light is projected onto a region (mainly the lower region in the central portion) in the low beam light distribution pattern by the projection lens 90 composed of the primary lens 60A and the secondary lens 80. Be done.

Further, the light from the low beam light source 32a, which is guided through the upper separator body 52A while repeating total reflection between the front surface 52Aa and the rear surface 52Ab of the upper separator body 52A and emitted from the front surface 52Aa of the upper separator body 52A, is the primary. It is considered that this is because the projection lens 90 composed of the lens 60A and the secondary lens 80 projects the light intensity in the low beam light distribution pattern to a region where the light intensity is relatively low (mainly, the lower region in the central portion).

Further, as shown in FIG. 19B, the low beam light distribution pattern formed as described above has a longer vertical length than the ADB light distribution pattern P _ADB (in addition, the present inventors have a longer vertical length (as shown in FIG. 19 (b)). In FIG. 19 (b), it was confirmed that T3 <T4), the density was low (the bright range was narrow), and the maximum luminous intensity was low. FIG. 19B is an example of an ADB light distribution pattern and a low beam light distribution pattern formed when the separator 50A shown in FIG. 20 is used.

The reason why the low beam light distribution pattern has a longer vertical length than the ADB light distribution pattern is that the second region B2 is arranged forward (or backward) with respect to the focal plane FP of the projection lens 90. Therefore, the light from the low beam light source 32a that emits light from the front surface 52Aa of the upper separator main body 52A and further enters the primary lens 60A from the upper light entering surface 60Ab1 of the primary lens 60A is emitted by the primary lens 60A and the secondary lens 80. It is considered that this is due to the fact that the projection lens 90 is projected in a blurred state.

Further, the reason why the low beam light distribution pattern has a lower density (narrower bright range) and a lower maximum luminous intensity than the ADB light distribution pattern is a part of the low beam light distribution pattern (for example, horizontal line). It is considered to be the same as the reason why the luminous intensity does not increase (around 4 degrees below).

In FIG. 19 (b), the width W2 of the low beam light distribution pattern P _Lo is wider than the width W1 of the ADB light distribution pattern P _ADB because the low beam light source 32a is shown in FIG. 15 (b). This is because the width W4 of the first light guide unit 52d to which the light from the light source is guided is wider than the width W3 of the second light guide unit 53d to which the light from the ADB light source 32b is guided.

When the ADB light source 32b is turned on, the ADB light distribution pattern P _ADB is formed, and when the low beam light source 32a and the ADB light source 32b are turned on, the low beam light distribution pattern P _Lo and the ADB light distribution pattern P _ADB are formed. A synthetic light distribution pattern containing is formed. Since this point is the same as that of the first embodiment, the description thereof will be omitted.

Further, the present inventors have confirmed that the contour of the light distribution pattern for ADB formed as described above is appropriately blurred.

The reason why the outline of the light distribution pattern for ADB is appropriately blurred is that the third region B3 is arranged behind (or in front of) the focal plane FP of the projection lens 90, so that the lower separator main body 53 The light from the ADB light source 32b that emits light from the front surface 53a of the primary lens 60A and further enters the primary lens 60A from the lower incoming light surface 60Ab2 of the primary lens 60A is emitted by the projection lens 90 composed of the primary lens 60A and the secondary lens 80. It is thought that this is due to the fact that it is projected in a blurred state.

As described above, according to the present embodiment, the low beam light distribution pattern has a longer vertical length, a lower density (narrower bright range), and a lower maximum luminous intensity than the ADB light distribution pattern. Further, it is possible to provide a vehicle lamp 10A capable of forming a light distribution pattern for ADB whose contour is appropriately blurred.

Further, according to the present embodiment, it is possible to suppress that the luminous intensity of a part of the low beam light distribution pattern (for example, around 4 degrees below the horizontal line) becomes relatively high, and the thickness in the vertical direction with respect to the horizontal direction. It is possible to provide a vehicle lamp 10A capable of forming a low beam light distribution pattern in which the light distribution is uniform (that is, it is possible to suppress a decrease in the light distribution feeling).

As a result of the examination by the present inventors, in the vehicle lamp 10A having the above configuration, due to the molding variation of the separator 50A, the temperature change, and the like, as shown in FIG. 22A, the light from the low beam light source 32a There may be a gap S13 between the front surface 52Aa of the upper separator body 52A and the front surface 53a of the lower separator body 53 where the light from the ADB light source 32b emits light. As shown in b), the luminous intensity sharply decreases between the low beam light distribution pattern P _Lo and the ADB light distribution pattern P _ADB (see the gap indicated by the reference numeral S14 in FIG. 22 (a)), and the light distribution occurs. It turned out that the feeling was reduced. 22 (a) is a diagram for explaining a gap S13 between the front surface 52Aa of the upper separator main body 52A and the front surface 53a of the lower separator main body 53 from which light emitted from the ADB light source 32b is emitted, FIG. 22 (b) is a diagram. This is an example of a synthetic light distribution pattern including a low beam light distribution pattern and an ADB light distribution pattern, which is formed when the gap S13 is generated.

Next, as a third embodiment, there is a gap S13 between the front surface 52Aa of the upper separator body 52A where the light from the low beam light source 32a is emitted and the front surface 53a of the lower separator body 53 where the light from the ADB light source 32b is emitted. Even when the light distribution pattern P _Lo for low beam and the light distribution pattern P _ADB for ADB change in luminosity smoothly, it is possible to suppress the deterioration of the light distribution feeling. The lighting tool 10B will be described.

The vehicle lamp 10B of the present embodiment is different from the vehicle lamp 10A of the second embodiment in that the separator 50B is used instead of the separator 50A. Other than that, it has the same configuration as the second embodiment. Hereinafter, the differences from the second embodiment will be mainly described, and the same reference numerals will be given to the same configurations, and the description thereof will be omitted as appropriate.

FIG. 23 is a partial vertical sectional view of the separator 50B. FIG. 24A is a perspective view of the upper separator main body 52B, and FIG. 24B is a perspective view of the lower separator main body 53B.

The separator 50B shown in FIG. 23 is configured by combining the upper separator main body 52B and the lower separator main body 53B shown in FIG. 24.

As shown in FIGS. 23 and 24 (b), the separator 50B includes an overlap portion 57 in which the upper portion of the front end portion of the lower separator main body 53B extends upward as compared with the separator 50A of the second embodiment. It's different. Other than that, it has the same configuration as the separator 50A of the second embodiment. Hereinafter, the differences from the separator 50A of the second embodiment will be mainly described, and the same reference numerals will be given to the same configurations, and the description thereof will be omitted as appropriate.

As shown in FIG. 23, the overlap portion 57 includes a front surface 57a facing the upper light entering surface 60Ab1 (not shown in FIG. 23) of the primary lens 60A, and a lower portion and a lower separator body of the upper separator body 52B (front surface 52Aa). It is a thin film-shaped light guide portion including a gap S13 between the upper part of the 53B (front surface 53a) and a rear surface 57b facing the front surface 52Aa of the upper separator main body 52B.

The thickness T3 of the overlap portion 57 is, for example, 0.2 mm. It is desirable that the thickness T3 of the overlap portion 57 is as thin as possible in order to suppress the decrease in the transmittance of the light emitted from the low beam light source 32a emitted from the front surface 52Aa of the upper separator main body 52B.

In the overlap portion 57, the light Ray 3 from the ADB light source 32b, which is guided through the overlap portion 57 while repeating total reflection between the front surface 57a and the rear surface 57b of the overlap portion 57, is the overlap portion 57. A gap S15 is formed between the rear surface 57b of the overlap portion 57 and the front surface 52Aa of the upper separator main body 52B so that light is emitted from the front surface 57a. The gap S15 is, for example, 0.02 mm.

In the vehicle lamp 10B having the above configuration, when the low beam light source 32a and the ADB light source 32b are turned on at the same time, the light from the low beam light source 32a is emitted from the first light input surface 52e to the separator 50B (first light guide unit 52d). It shines in.

Of the light from the low beam light source 32a that has entered the separator 50B (first light guide unit 52d), some of the light, for example, the light Ray1 having a relatively strong luminosity (see, for example, FIG. 17) is the upper separator. Light is emitted directly from the lower part of the front surface 52Aa of the main body 52B, passes through the overlap portion 57, and further enters the primary lens 60A from the upper light entering surface 60Ab1 of the primary lens 60A, and is composed of the primary lens 60A and the secondary lens 80. It is used to form a low beam light distribution pattern by being projected by the projection lens 90.

Further, among the light from the low beam light source 32a that has entered the separator 50B (first light guide unit 52d), some other light, for example, light Ray2 having a relatively weak light intensity (see, for example, FIG. 17). Is guided through the inside of the upper separator body 52B while repeating total reflection between the front surface 52Aa and the rear surface 52Ab of the upper separator body 52B, emits light from the front surface 52Aa of the upper separator body 52B, and passes through the overlap portion 57. Further, the light enters the primary lens 60A from the upper light entering surface 60Ab1 of the primary lens 60A and is projected by the projection lens 90 composed of the primary lens 60A and the secondary lens 80, so that it is used for forming a low beam light distribution pattern. ..

On the other hand, the light from the ADB light source 32b enters the separator 50B (second light guide unit 53d) from the second light entry surface 53e.

Of the light from the ADB light source 32b that has entered the separator 50B (second light guide unit 53d), a part of the light is directly emitted from the upper part of the front surface 53a of the lower separator main body 53B, and further, the lower light of the primary lens 60A. Light enters the primary lens 60A from the surface 60Ab2 and is projected by the projection lens 90 composed of the primary lens 60A and the secondary lens 80 to be used for forming a light distribution pattern for ADB.

Further, as shown in FIG. 23, of the light from the ADB light source 32b that has entered the separator 50B (second light guide unit 53d), the other part (see the light beam indicated by the reference numeral Ray 3 in FIG. 23) While repeating total reflection between the front surface 57a and the rear surface 57b of the overlap portion 57, the inside of the overlap portion 57 is guided and light is emitted from the front surface 57a of the overlap portion 57, and further, the primary lens 60A and the secondary lens 80 provide light. It is projected between the low beam light distribution pattern (lower part) and the ADB light distribution pattern (upper part) by the configured projection lens 90.

As shown in FIG. 25, the present inventors have described the low beam light distribution pattern and the synthetic light distribution pattern including the ADB light distribution pattern formed as described above for the low beam light distribution patterns P _Lo and ADB. It was confirmed that the change in luminous intensity between the light distribution pattern P _ADB and the light distribution pattern P ADB became gentle, and it was possible to suppress the deterioration of the light distribution feeling. FIG. 25 is an example of a synthetic light distribution pattern including a low beam light distribution pattern P _Lo and an ADB light distribution pattern P _ADB formed by the vehicle lamp 10B.

As described above, according to the present embodiment, the front surface 52Aa of the upper separator body 52B where the light from the low beam light source 32a is emitted and the front surface 53a of the lower separator body 53B where the light from the ADB light source 32b is emitted. Even when a gap S13 is generated between them, the change in luminous intensity between the low beam light distribution pattern P _Lo and the ADB light distribution pattern P _ADB becomes gentle, and the light distribution feeling is suppressed from deteriorating. It is possible to provide a vehicle lighting fixture 10B capable of being capable.

Next, a modification will be described.

FIG. 26 is a partial vertical sectional view of the separator 50B (modification example).

In the third embodiment, an example in which the overlap portion 57 in which the upper portion of the front end portion of the lower separator main body 53B extends upward is used as the overlap portion has been described, but the present invention is not limited to this. For example, as shown in FIG. 26, as the overlap portion, the overlap portion 58 in which the lower portion of the front end portion of the upper separator main body 52B extends downward may be used.

The overlap portion 58 includes a front surface 58a facing the lower light plane 60Ab2 (not shown in FIG. 26) of the primary lens 60A, a lower portion of the upper separator body 52B (front surface 52Aa), and an upper portion of the lower separator body 53B (front surface 53a). It is a thin film-shaped light guide portion including a gap S13 between the two and a rear surface 58b facing the front surface 53a of the lower separator main body 53B.

The thickness T4 of the overlap portion 58 is, for example, 0.2 mm. It is desirable that the thickness T4 of the overlap portion 58 is as thin as possible in order to suppress the decrease in the transmittance of the light emitted from the ADB light source 32b emitted from the front surface 53a of the lower separator main body 53B.

In the overlap portion 58, the light from the low beam light source 32a guided through the overlap portion 58 while repeating total reflection between the front surface 58a and the rear surface 58b of the overlap portion 58 is the front surface of the overlap portion 58. A gap S16 is formed between the rear surface 58b of the overlap portion 58 and the front surface 53a of the lower separator main body 53B so that light is emitted from the 58a. The gap S16 is, for example, 0.02 mm.

In this modification, when the low beam light source 32a and the ADB light source 32b are turned on at the same time, the light from the low beam light source 32a enters the separator 50B (first light guide unit 52d) from the first light input surface 52e. ..

Of the light from the low beam light source 32a that has entered the separator 50B (first light guide unit 52d), the light Ray1 (see, for example, FIG. 17) having a relatively strong luminosity is the lower part of the front surface 52Aa of the upper separator body 52B. Light is emitted directly from the primary lens 60A, transmitted through the overlap portion 58, and further enters the primary lens 60A from the upper light entering surface 60Ab1 of the primary lens 60A, and is projected by the projection lens 90 composed of the primary lens 60A and the secondary lens 80. Therefore, it is used to form a light distribution pattern for low beams.

Further, among the light from the low beam light source 32a that has entered the separator 50B (first light guide unit 52d), the light Ray2 (see, for example, FIG. 17) having a relatively weak light intensity is the front surface 52Aa of the upper separator main body 52B. While repeating total reflection between the surface and the rear surface 52Ab, the inside of the upper separator body 52B is guided and light is emitted from the front surface 52Aa of the upper separator body 52B, and further enters the primary lens 60A from the upper light input surface 60Ab1 of the primary lens 60A. It shines and is projected by a projection lens 90 composed of a primary lens 60A and a secondary lens 80 to be used for forming a low beam light distribution pattern.

Further, of the light from the low beam light source 32a that has entered the separator 50B (first light guide unit 52d), the other part (see the light beam indicated by the reference numeral Ray 4 in FIG. 26) is the front surface 58a of the overlap portion 58. While repeating total reflection between the surface and the rear surface 58b, the inside of the overlap portion 58 is guided and light is emitted from the front surface 58a of the overlap portion 58, and further, by a projection lens 90 composed of a primary lens 60A and a secondary lens 80. It is projected between the low beam light distribution pattern (lower part) and the ADB light distribution pattern (upper part).

On the other hand, the light from the ADB light source 32b enters the separator 50B (second light guide unit 53d) from the second light entry surface 53e.

Of the light from the ADB light source 32b that has entered the separator 50B (second light guide unit 53d), a part of the light is directly emitted from the upper part of the front surface 53a of the lower separator main body 53B, and further, the lower light of the primary lens 60A. Light enters the primary lens 60A from the surface 60Ab2 and is projected by the projection lens 90 composed of the primary lens 60A and the secondary lens 80 to be used for forming a light distribution pattern for ADB.

As shown in FIG. 25, the present inventors have described the low beam light distribution pattern and the synthetic light distribution pattern including the ADB light distribution pattern formed as described above for the low beam light distribution patterns P _Lo and ADB. It was confirmed that the change in luminous intensity between the light distribution pattern P _ADB and the light distribution pattern P ADB became gentle, and it was possible to suppress the deterioration of the light distribution feeling.

Further, in the third embodiment, an example in which the overlap portion 57 is applied to the separator 50A of the vehicle lamp 10A of the second embodiment has been described, but the present invention is not limited to this. For example, the overlap portion 57 may be applied to the separator 50 of the vehicle lamp 10A of the first embodiment and other separators. The same applies to the overlap portion 58.

In the above embodiment, an example in which a projection lens 90 composed of two lenses, a primary lens 60A and a secondary lens 80, is used as the projection lens has been described, but the present invention is not limited to this. For example, as the projection lens, although not shown, a projection lens composed of one lens may be used, or a projection lens composed of three or more lenses may be used.

Further, in the above embodiment, an example in which a spherical surface having a constant curvature (see FIG. 20) is used as the focal plane FP of the projection lens 90 has been described, but the present invention is not limited to this. For example, as shown in FIG. 21, a spherical surface whose curvature changes non-uniformly may be used as the focal plane FP of the projection lens 90. FIG. 21 is a modified example of the focal plane FP of the projection lens 90.

All of the numerical values shown in the above embodiments are examples, and it goes without saying that appropriate numerical values different from these can be used.

Each of the above embodiments is merely an example in every respect. The present invention is not limitedly construed by the description of each of the above embodiments. The present invention can be practiced in various other forms without departing from its spirit or key features.

10 ... Vehicle lighting equipment, 20 ... Heat sink, 22 ... Base, 22a ... Front surface, 22a1 ... Light source module mounting surface, 22a2 ... Peripheral surface, 22a3 ... Holder contact surface, 22a4 ... Retainer contact surface, 22a5 ... Screw holes, 22a6 ... Positioning pin, 22b ... Rear surface, 22c ... Screw hole, 24 ... First extension, 26 ... Second extension, 28 ... Radiation fin, 30 ... Light source module, 32a ... Low beam light source, 32b ... ADB light source, 34 ... Board, 34a ... Through hole, 34c ... Connector, 40 ... Holder, 40a ... Front opening end face, 42 ... Holder body, 42a ... Front surface, 42c ... Through hole, 44 ... Cylindrical part, 46 ... Flange part, 48 ... Convex part, 49 ... Convex part, 50, 50A ... Separator, 52, 52A ... Upper separator body, 52a, 52Aa ... Front surface, 52a1 ... Stepped edge part, 52a2 ... Extension edge part, 52a3 ... Extension edge part, 52b, 52Ab ... rear surface, 52c ... lower end surface, 52d ... first light guide section, 52e ... first light entry surface, 52f ... flange section, 52f1 ... through hole, 52f2 ... through hole, 52g ... light guide section, 52h ... light entry surface , 53 ... Lower separator body, 53a ... Front surface, 53a1 ... Stepped edge part, 53a2 ... Extension edge part, 53a3 ... Extension edge part, 53b ... Rear surface, 53c ... Upper end surface, 53d ... Second light guide part, 53e ... Second 2 Incoming light surface, 53f ... Flange part, 53f1 ... Through hole, 53g ... Light guide part, 53h ... Incoming light surface, 60, 60A ... Primary lens, 60a ... Front surface, 60b, 60Ab ... Rear surface, 60Ab1 ... Upper light entering surface , 60Ab2 ... lower light surface, 62 ... flange part, 70 ... retainer, 72 ... retainer body, 76 ... flange part, 80 ... secondary lens, 82 ... lens body, 82a ... front surface, 82b ... rear surface, 84 ... tubular part , 86 ... Holding part and screw receiving part, 88 ... Positioning pin, AX ... Reference axis, CL ... Cut offline, CL1 ... Left horizontal cut offline, CL2 ... Right horizontal cut offline, CL3 ... Cut offline, CL _ADB ... Cut offline, CL _Lo ... Cut offline, F ... Focus, N1, N2 ... Screw, P _ADB ... Light distribution pattern for ADB, P _Lo ... Light distribution pattern for low beam

Claims (4)

A projection lens, a separator arranged behind the projection lens, and light arranged behind the separator, transmitted through the separator and the projection lens in this order and irradiated forward to form a low beam light distribution pattern. In a vehicle lamp equipped with a low beam light source that emits light.
Further provided with an ADB light source that emits light that passes through the separator and the projection lens in this order and is irradiated forward to form an ADB light distribution pattern.
The separator includes an upper separator body including a front surface from which light from the low beam light source is emitted, and a lower separator body including a front surface from which light from the ADB light source is emitted.
The low beam light source and the upper separator body are arranged above a reference axis that passes through the focal point of the projection lens and extends in the front-rear direction of the vehicle.
The ADB light source and the lower separator main body are arranged below the reference axis.
The upper portion of the front end portion of the lower separator body includes an overlapping portion extending upward.
The overlap portion includes a gap between the lower portion of the upper separator body and the upper portion of the lower separator body, a rear surface facing the front surface of the upper separator body, and a front surface facing the rear surface of the projection lens. ,
A part of the light from the ADB light source that has entered the lower separator body is guided through the overlap portion while repeating total reflection between the front surface and the rear surface of the overlap portion, and the overlap portion is guided. A vehicle lamp that emits light from the front surface of the light and is further projected by the projection lens into a region between the lower part of the low beam light distribution pattern and the upper part of the ADB light distribution pattern. A projection lens, a separator arranged behind the projection lens, and light arranged behind the separator, transmitted through the separator and the projection lens in this order and irradiated forward to form a low beam light distribution pattern. In a vehicle lamp equipped with a low beam light source that emits light.
Further provided with an ADB light source that emits light that passes through the separator and the projection lens in this order and is irradiated forward to form an ADB light distribution pattern.
The separator has an upper separator main body including a front surface and a rear surface on the opposite side thereof, and a first light input surface extending from the lower portion of the upper separator main body toward the low beam light source and facing the low beam light source at the tip end. A second light guide portion having a lower separator body including a front surface and a rear surface on the opposite side thereof, and a second light source extending from the upper portion of the lower separator body toward the ADB light source and facing the ADB light source at the tip. Includes a second light source with an incoming surface,
The projection lens includes a front surface and a rear surface on the opposite side thereof.
The rear surface of the projection lens includes an upper light entering surface facing the front surface of the upper separator body and a lower light entering surface facing the front surface of the lower separator body.
The low beam light source, the first light guide unit, the upper separator main body, and the upper light entering surface are each arranged above a reference axis that passes through the focal point of the projection lens and extends in the front-rear direction of the vehicle.
The ADB light source, the second light guide unit, the lower separator main body, and the lower incoming light surface are arranged below the reference axis, respectively.
The upper portion of the front end portion of the lower separator body includes an overlapping portion extending upward.
The overlap portion includes a gap between the lower portion of the upper separator body and the upper portion of the lower separator body, a rear surface facing the front surface of the upper separator body, and a front surface facing the upper light entering surface of the projection lens. , Including
The light from the low beam light source enters the first light guide portion from the first light incoming surface, a part of the light directly emits light from the front surface of the upper separator main body, and the other part of the light is directly above the upper separator body. While repeating total reflection between the front surface and the rear surface of the separator body, the inside of the upper separator body is guided and light is emitted from the front surface of the upper separator body, transmitted through the overlap portion, and further above the projection lens. Light enters the projection lens from the light entry surface and is projected by the projection lens to be used for forming the low beam light distribution pattern.
Of the light from the ADB light source that has entered the second light guide portion from the second incoming light surface, a part of the light is directly emitted from the front surface of the lower separator main body, and further, the lower incoming light of the projection lens. Light enters the projection lens from a surface and is projected by the projection lens to be used for forming the ADB light distribution pattern, and the other part is totally reflected between the front surface and the rear surface of the overlap portion. The light is guided from the front surface of the overlapped portion while repeating the above steps, and further, the region between the lower part of the low beam light distribution pattern and the upper part of the ADB light distribution pattern by the projection lens. Light fixtures for vehicles projected on. A projection lens, a separator arranged behind the projection lens, and light arranged behind the separator, transmitted through the separator and the projection lens in this order and irradiated forward to form a low beam light distribution pattern. In a vehicle lamp equipped with a low beam light source that emits light.
Further provided with an ADB light source that emits light that passes through the separator and the projection lens in this order and is irradiated forward to form an ADB light distribution pattern.
The separator includes an upper separator body including a front surface from which light from the low beam light source is emitted, and a lower separator body including a front surface from which light from the ADB light source is emitted.
The low beam light source and the upper separator body are arranged above a reference axis that passes through the focal point of the projection lens and extends in the front-rear direction of the vehicle.
The ADB light source and the lower separator main body are arranged below the reference axis.
The lower portion of the front end portion of the upper separator body includes an overlapping portion extending downward.
The overlap portion includes a gap between the lower portion of the upper separator body and the upper portion of the lower separator body, a rear surface facing the front surface of the lower separator body, and a front surface facing the rear surface of the projection lens. ,
A part of the light from the low beam light source that has entered the upper separator body is guided through the overlap portion while repeating total reflection between the front surface and the rear surface of the overlap portion, and the overlap portion is guided. A vehicle lamp that emits light from the front surface of the light and is further projected by the projection lens into a region between the lower part of the low beam light distribution pattern and the upper part of the ADB light distribution pattern. A projection lens, a separator arranged behind the projection lens, and light arranged behind the separator, transmitted through the separator and the projection lens in this order and irradiated forward to form a low beam light distribution pattern. In a vehicle lamp equipped with a low beam light source that emits light.
Further provided with an ADB light source that emits light that passes through the separator and the projection lens in this order and is irradiated forward to form an ADB light distribution pattern.
The separator has an upper separator main body including a front surface and a rear surface on the opposite side thereof, and a first light input surface extending from the lower portion of the upper separator main body toward the low beam light source and facing the low beam light source at the tip end. A second light guide portion having a lower separator body including a front surface and a rear surface on the opposite side thereof, and a second light source extending from the upper portion of the lower separator body toward the ADB light source and facing the ADB light source at the tip. Includes a second light source with an incoming surface,
The projection lens includes a front surface and a rear surface on the opposite side thereof.
The rear surface of the projection lens includes an upper light entering surface facing the front surface of the upper separator body and a lower light entering surface facing the front surface of the lower separator body.
The low beam light source, the first light guide unit, the upper separator main body, and the upper light entering surface are each arranged above a reference axis that passes through the focal point of the projection lens and extends in the front-rear direction of the vehicle.
The ADB light source, the second light guide unit, the lower separator main body, and the lower incoming light surface are arranged below the reference axis, respectively.
The lower portion of the front end portion of the upper separator body includes an overlapping portion extending downward.
The overlap portion includes a gap between the lower part of the upper separator body and the upper part of the lower separator body, a rear surface facing the front surface of the lower separator body, and a front surface facing the lower light entering surface of the projection lens. , Including
The light from the low beam light source enters the first light guide portion from the first light incoming surface, a part of the light directly emits light from the front surface of the upper separator main body, and the other part of the light is directly above the upper separator body. While repeating total reflection between the front surface and the rear surface of the separator body, the inside of the upper separator body is guided and light is emitted from the front surface of the upper separator body, and further, from the upper light entering surface of the projection lens to the projection lens. It is used to form the low beam light distribution pattern by receiving light and projecting it with the projection lens.
Of the light from the low beam light source that has entered the first light guide portion from the first light input surface, a part of the light is repeatedly totally reflected between the front surface and the rear surface of the overlap portion, and the overlap is performed. The inside of the portion is guided and light is emitted from the front surface of the overlap portion, and further projected by the projection lens on the region between the lower portion of the low beam light distribution pattern and the upper portion of the ADB light distribution pattern.
Of the light from the ADB light source that enters the second light guide portion from the second light entry surface, a part of the light directly emits light from the front surface of the lower separator main body, passes through the overlap portion, and further. A vehicle lighting tool used for forming a light distribution pattern for ADB by entering light into the projection lens from the lower light entering surface of the projection lens and projecting the light by the projection lens.

Images