JP6659456B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicle that emits light that contributes to the formation of at least a low-beam light distribution pattern (main light distribution pattern) and an overhead sign light distribution pattern. Lighting equipment.

  DESCRIPTION OF RELATED ART Conventionally, as a vehicle lamp which forms the low beam light distribution pattern and the overhead sign light distribution pattern by the emitted light, there exists the thing disclosed by patent document 1, for example.

  The disclosed vehicle lamp (vehicle lamp unit) is a projector-type lamp unit configured to form a low-beam light distribution pattern, and its specific configuration is as shown in FIG. The wavelength conversion member 82 is disposed above the light exit surface 80b side of the light guide 80 in which the light entrance surface 80a is disposed near the front of the excitation light source 81 and the light exit surface 80b is disposed in close contact with or close to the wavelength conversion member 82. A main reflecting surface 83 and a first sub-reflecting surface 84 are arranged so as to cover, and a second sub-reflecting surface 85 is disposed obliquely below and in front of the main reflecting surface 83 and the first sub-reflecting surface 84, and a projection lens 86 is disposed in front thereof. ing.

  Among them, the main reflection surface 83 has an elliptical shape in a vertical direction extending upward from a range of 120 ° on each of the left and right sides with respect to a center axis Xa extending on the vehicle rear side (opposite to the projection lens 86). The first sub-reflecting surface 84 has a spheroidal shape extending from near the tip of the main reflecting surface 83 toward the projection lens 86, and the second sub-reflecting surface 85 is located on the vehicle front side with respect to the horizontal plane ( It has a planar shape inclined downward toward the projection lens 86).

  Therefore, the light emitted from the excitation light source 81 and incident on the light guide 80 via the light entrance surface 80a of the light guide 80 is guided inside the light guide 80 and directed to the wavelength conversion member 82 via the light exit surface 80b. And is emitted. Then, from the wavelength conversion member 82, a mixed light of the wavelength-converted light excited by the light emitted from the excitation light source 81 and wavelength-converted and the direct light directly transmitted by the light emitted from the excitation light source 81 is emitted. The light is reflected in a predetermined direction by the reflecting surface 83, the first sub-reflecting surface 84, and the second sub-reflecting surface 85, and the respective reflected light passes through the projection lens 86 located in front and is emitted to the outside.

  The light distribution pattern projected on the virtual vertical screen supposed in front of the vehicle by the irradiation light from the vehicle lamp unit 90 having the above configuration is, as shown in FIG. 11B, the central axis Xa of the main reflection surface 83. , A partial distribution light pattern (high luminosity region) P1 is formed by the reflected light in the region 83b near the horizontal plane, and a partial distribution light pattern P2 is formed by the reflected light in a portion other than the region 83b of the main reflection surface 83. A low-beam light distribution pattern located below the horizontal reference line (H) is formed by a combined light distribution pattern of the light pattern P1 and the partial distribution light pattern P2.

  In addition, an overhead sign such as a road sign or a road information board, which is located above the horizontal reference line (H), is provided by the light reflected on the second sub-reflection surface 85 after the reflection on the first sub-reflection surface 84. The overhead sign light distribution pattern P3 illuminating the overhead sign area A is formed.

Patent No. 5812283

  By the way, the vehicular lamp unit 90 having the above configuration is provided between the low beam light distribution pattern formed by the combined light distribution pattern of the partial light distribution pattern P1 and the partial light distribution pattern P2, and the overhead sign light distribution pattern P3. A dark area (dark area) B to which irradiation light is not directed (not illuminated) occurs. For this reason, there is a possibility that the visibility of the driver during night driving may be reduced, which may hinder driving.

  Therefore, the present invention has been made in view of the above-described problem, and has as its object to at least combine the light distribution patterns of the low beam light distribution pattern (main light distribution pattern) and the overhead sign light distribution pattern with each other. An object of the present invention is to realize a vehicular lamp with good visibility for a driver during nighttime driving by partially overlapping and forming.

  In order to solve the above-mentioned problem, the invention described in claim 1 of the present invention provides a light source, a first reflecting surface located above the light source, and a second reflecting surface located near a front end of the first reflecting surface. A reflecting surface, a third reflecting surface located below the second reflecting surface, a lens located in front of the third reflecting surface, and a shade located between the light source and the lens. The first reflecting surface is a spheroidal reflecting surface based on a spheroidal surface having a first focal point at the position of the light source and having a second focal point at a front end of the shade, and the second reflecting surface. Is a spheroid based on a spheroid having a first focal point as one focal point and a third focal point serving as the other focal point on a substantially extended line from the second reflecting surface to the third reflecting surface. A third reflecting surface, wherein the third reflecting surface is inclined forward from a position near the second focal point. A reflecting surface extending obliquely downward, wherein the lens has the second focal point as a focal point, and at least a part of a lower portion of a light exit surface on the front surface of the lens has light passing through the second focal point; Is a projection-type lens having a shape formed to have a curvature smaller than the curvature of the parallel light, and wherein the virtual focal point of the third focal point is located near the lower part of the light exit surface on the front surface of the lens. It is assumed that.

  Further, according to the invention described in claim 2 of the present invention, the light source, a first reflecting surface located above the light source, a second reflecting surface located near a front end of the first reflecting surface, A third reflection surface located below the second reflection surface, a lens located in front of the third reflection surface, and a shade located between the light source and the lens, wherein the first reflection surface has A spheroidal reflecting surface based on a spheroidal surface having a first focal point at the position of the light source and a second focal point at the front end of the shade, wherein the second reflecting surface is the first focal point; And a spheroidal reflecting surface based on a spheroidal surface having a third focal point serving as the other focal point on a substantially extended line passing from the second reflecting surface to the third reflecting surface, The third reflecting surface is inclined forward and obliquely downward from a position near the second focal point. A reflective surface extending from the lens, wherein the lens has the second focal point as a focal point, and at least a part of a lower portion of a light incident surface on the rear surface of the lens has a curvature that makes light passing through the second focal point into parallel light. Is a projection type lens having a shape formed with a small curvature, and wherein the virtual focus of the third focus is located near the lower part of the light incident surface behind the lens.

  Further, according to the invention described in claim 3 of the present invention, the light source, a first reflecting surface located above the light source, a second reflecting surface located near a front end of the first reflecting surface, A third reflection surface located below the second reflection surface, a lens located in front of the third reflection surface, and a shade located between the light source and the lens, wherein the first reflection surface has A spheroidal reflecting surface based on a spheroidal surface having a first focal point at the position of the light source and a second focal point at the front end of the shade, wherein the second reflecting surface is the first focal point; And a spheroidal reflecting surface based on a spheroidal surface having a third focal point serving as the other focal point on a substantially extended line passing from the second reflecting surface to the third reflecting surface, The third reflecting surface is inclined forward and obliquely downward from a position near the second focal point. A reflecting surface that extends, wherein the lens has a focal point at the second focal point, and at least a part of an upper portion of a light exit surface on the front surface of the lens has a curvature larger than a curvature that causes light passing through the second focal point to be parallel light. It is a projection type lens having a shape formed with a large curvature and wherein the virtual focal point of the third focal point is located near the upper part of the light exit surface on the front surface of the lens.

  Also, the invention described in claim 4 of the present invention is a light source, a first reflection surface located above the light source, a second reflection surface located near a front end of the first reflection surface, A third reflection surface located below the second reflection surface, a lens located in front of the third reflection surface, and a shade located between the light source and the lens, wherein the first reflection surface has A spheroidal reflecting surface based on a spheroidal surface having a first focal point at the position of the light source and a second focal point at the front end of the shade, wherein the second reflecting surface is the first focal point; And a spheroidal reflecting surface based on a spheroidal surface having a third focal point serving as the other focal point on a substantially extended line passing from the second reflecting surface to the third reflecting surface, The third reflecting surface is inclined forward and obliquely downward from a position near the second focal point. A reflecting surface that extends, wherein the lens has the second focal point as a focal point, and at least a part of an upper portion of a light incident surface on the rear surface of the lens has a curvature larger than a curvature that makes light passing through the second focal point into parallel light. It is a projection type lens having a shape formed with a large curvature and having the virtual focal point of the third focal point located near the upper part of the light incident surface behind the lens.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a fourth reflection surface is provided near a front end of the second reflection surface, and the fourth reflection surface is provided. The surface is curved and inclined inward with respect to the vicinity of the front end of the second reflecting surface, and is a reflecting surface configured to reflect light from the light source backward from the third focal point.

  The invention described in claim 6 of the present invention is characterized in that, in any one of claims 1 to 5, the light source is a semiconductor light emitting element.

  According to the present invention, the main light distribution pattern is formed by the light reflected by the first reflection surface, and the upper light of the main light distribution pattern is formed by the light reflected by the second reflection surface and further reflected by the third reflection surface. An overhead sign light distribution pattern that overlaps and is connected is formed.

  As a result, there is no dark portion between the main light distribution pattern and the overhead sign light distribution pattern, and the visibility of the driver in front of and at an obliquely upper front during night driving is increased, and obstacles and road signs in front of the vehicle and An overhead sign such as a road information board can be easily recognized.

It is an outline exploded perspective view of the important section of the vehicular lamp of an embodiment. FIG. 2 is a longitudinal sectional view along a vehicle front-rear direction when the vehicle is mounted in FIG. 1. It is a layout explanatory view of the surface which constitutes the optical system of the vehicular lamp of the embodiment. FIG. 4 is a partially enlarged explanatory view of a light exit surface at a lower end of a lens. It is an optical path figure of the vehicular lamp of an embodiment. It is explanatory drawing of the light distribution pattern formed in the vehicle lamp of embodiment. Similarly, it is explanatory drawing of the light distribution pattern formed in the vehicle lamp of embodiment. It is explanatory drawing of the conventional light distribution pattern. FIG. 3 is a partially enlarged explanatory view of a light emitting surface at an upper end portion of a lens. It is explanatory drawing which changed some lamps for vehicles of embodiment. It is explanatory drawing of a conventional example.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10 (the same parts are denoted by the same reference numerals). The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are added. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

  1 is a schematic exploded perspective view of a main part of the vehicle lamp of the embodiment, FIG. 2 is a longitudinal sectional view along the vehicle front-rear direction when the vehicle is mounted in FIG. 1, and FIG. 3 is an optical system of the vehicle lamp of the embodiment. FIG. 4 is a partially enlarged explanatory view of a light emitting surface at a lower end portion of a lens, FIG. 5 is an optical path diagram of a vehicle lamp of the embodiment, and FIGS. 6 and 7 are vehicle lamps of the embodiment. It is explanatory drawing of the light distribution pattern formed.

  A vehicular lamp (hereinafter, abbreviated as “lamp”) 1 of the present invention includes a light source 2, four reflectors of a first reflector 10, a second reflector 20, a fourth reflector 30, and a third reflector 40, a shade 50, This is a so-called projector-type lamp in which an optical system is configured by the lens 60.

  The general positional relationship between the constituent members of the optical system is as follows: the first reflector 10 is located above the light source 2, the second reflector 20 and the fourth reflector 30 are located near the front end of the first reflector, The shade 50 and the third reflector 40 are located below the reflector 20 and the fourth reflector 30, and the lens 60 is located in front of the shade 50 and the third reflector 40.

  The light source 2 is disposed with the light emitting surface facing upward substantially on the central axis Z extending in the front-rear direction of the vehicle when the lamp is mounted on the vehicle. Specifically, a semiconductor light emitting element such as an LED is used as the light source 2. Alternatively, the phosphor may be irradiated with laser light from a laser light source to obtain mixed color light. In this case, a phosphor is arranged at the position of the light source 2.

  The first reflector 10 is disposed above a horizontal plane including the central axis Z so as to cover the light source 2 (the light emitting surface of the light source 2) from above. In addition, a spheroidal reflecting surface (hereinafter, referred to as a “first reflecting surface”) 11 based on a spheroidal surface having the central axis Z as a major axis is provided on the inner surface thereof. The first focal point F1 of the first reflecting surface 11 is located at the light source 2, and the second focal point F2 is located on the center axis Z and forward of the focal point F1.

  Accordingly, light emitted from the light source 2 located at the position of the focal point F1 toward the first reflecting surface 11 of the first reflector 10 is reflected by the first reflecting surface 11 toward the position of the focal point F2 and the vicinity thereof. The reflected light passes through the position of the focal point F2 and the vicinity thereof and is irradiated from the front to a range obliquely downward and forward.

  The second reflector 20 is located near the front end of the first reflector 10, and has a focal point F1 at the position of the light source 2 and a focal point F3 obliquely below and below the focal point F2 on the inner surface, and has two focal points F1 and F3. A spheroidal reflecting surface (hereinafter, referred to as a “second reflecting surface”) 21 based on a spheroidal surface whose major axis is a straight line S passing through the focal point is provided.

  Accordingly, the light emitted from the light source 2 located at the position of the focal point F1 toward the second reflecting surface 21 of the second reflector 20 is located at the position of the focal point F3 located obliquely downward and forward on the second reflecting surface 21 and its position. The light is reflected toward the vicinity.

  The fourth reflector 30 has a curved shape with a free-form surface extending obliquely downward from the front end of the second reflector 20 toward the front, and has a second reflection surface on the inner surface facing forward from the front end of the second reflection surface 21. An inwardly curved reflecting surface (hereinafter referred to as a “fourth reflecting surface”) 31 that curves inward with respect to the vicinity of the front end of 21 is provided.

  Accordingly, light emitted from the light source 2 located at the position of the focal point F1 toward the fourth reflecting surface 31 of the fourth reflector 30 is reflected by the fourth reflecting surface 31 toward the rear side of the focal point F3.

  The third reflector 40 extends obliquely downward and forward from the vicinity of the focal point F2 in a side view, and has a curved shape in which a rear end side is curved forward and toward both sides through the vicinity of the focal point F2 in a plan view. And a flat curved reflecting surface (hereinafter, referred to as a “third reflecting surface”) 41 on the upper surface. The vertical direction in which the light reflected by the third reflection surface 41 is directed is set according to the inclination angle of the third reflection surface 41.

  The third reflector 40 is located (on a line segment) between the second reflector 20 and the fourth reflector 30 and the focal point F3, and is emitted from the light source 2 by the third reflection surface 41 and is the second reflector of the second reflector 20. The reflected light reflected toward the focal point F3 by the reflecting surface 21 is reflected obliquely downward and forward, and is emitted from the light source 2 and directed toward the rear side of the focal point F3 by the fourth reflecting surface 31 of the fourth reflector 30. The reflected light is reflected forward.

  The shade 50 has a planar shape extending substantially horizontally rearward from the focal point F2 in a side view, and is emitted from the light source 2 and directed toward the position of the focal point F2 and the vicinity thereof by the first reflection surface 11 of the first reflector 10. The light path is partially blocked so that unnecessary light is not emitted from the lamp 1 by blocking part of the reflected light.

  Further, in a plan view, the cutoff line of the passing light distribution pattern is formed by the light passing through the vicinity of the front end of the shade 50 among the light reflected by the first reflection surface 11 of the first reflector 10, so that the shape of the front end is changed. The setting is made so as to correspond to a desired cutoff line shape.

  In some cases, a reflective surface is provided on the upper surface of the shade 50, and a part of the light reflected by the first reflective surface 11 of the first reflector 10 is reflected by the reflective surface of the shade 50, and the reflected light traveling obliquely upward and forward is reflected. Can be effectively used as the output light of the lamp 1.

  The lens 60 is a projection-type lens composed of a biconvex lens in which each of the rear light incident surface 61 and the front light exit surface 62 has a curved surface that is convex outward, and adjusts the position of the focal point F2 on the light incident surface 61 side. The light that has entered the lens 60 via the light incident surface 61 through the focal point F2 and its vicinity as the focal position is emitted from the light emitting surface 62 forward as substantially parallel light.

  Also, near the lower end of the light exit surface 62 of the lens 60, the reflected light reflected toward the focal point F3 by the second reflection surface 21 of the second reflector 20 and reflected by the third reflection surface 41 of the third reflector 40. Has a virtual focal point F3 ′ of the focal point F3.

  In this case, as shown in FIG. 4, the lower end of the light exit surface 62 of the lens 60 is set to have a curvature smaller than the curvature of the curved surface of the upper light exit surface 62 and has a small curvature protruding forward. It has a portion (small curvature portion 62a) consisting of a surface 62b. As a result, light emitted from the light source 2 and radiated from the front to the front obliquely downward range on the first reflection surface 11 of the reflector 10 passes through the lens 60 and is emitted from the lower area of the light emission surface 62. At this time, the emission angle is reduced, and the emitted light is lowered accordingly.

  In other words, the reflected light reflected toward the lower part of the lens 60 by the first reflecting surface 11 has an angle (incident angle) of the incident light with respect to the normal of the position at the arrival point of the light incident surface 61 of the lens 60. Similarly, the light that is larger than the central portion, enters the lens 60, transmits through the lower side of the lens 60, and reaches the light exit surface 62 is also the exit light at the arrival point of the light exit surface 62 and the normal to the position. Angle (incident angle) is large. Therefore, the light emitted from the lower part of the lens 60 has a larger refraction angle than the light emitted from the central part of the lens 60, and the influence of the chromatic aberration becomes larger, so that the color separation of the light becomes remarkable.

  In particular, when blue light that is color-separated from the cutoff line of the passing light distribution pattern forms white light, which deviates from white and becomes incompatible with the law, the generation of chromatic aberration is suppressed by lowering the light emitted from the lens 60 downward, and the chromatic aberration is large. By directing the light downward, a cut-off line is mainly formed by light transmitted through the central portion of the lens 60 and less affected by chromatic aberration, and a light distribution pattern less affected by chromatic aberration is formed.

  At the same time, in order to direct the light passing through the focal point F3 'downward, the focal point F3' is set at a position near the small curvature surface 62b of the small curvature portion 62a of the light exit surface 62 of the lens 60.

  Therefore, as shown in FIG. 5, the spheroidal reflecting surface of the first reflector 10 which is radially emitted from the light source 2 located at the position of one focal point F1 and is located above the light source 2 so as to cover the light source 2. The light traveling toward the first reflecting surface 11 is reflected by the first reflecting surface 11 from the front toward the front and obliquely downward, and the reflected light passes through the position of the other focal point F2 and the vicinity thereof to the light of the lens 60. The light is emitted to the lower surface of the incident surface 61.

  Then, the light applied to the lower surface of the light incident surface 61 of the lens 60 is refracted by the light incident surface 61 and enters the lens 60, passes through the lens 60, is refracted again by the light exit surface 62, and exits to the outside. Is done.

  In particular, light transmitted through the inside of the lens 60 toward the lower end surface (small curvature surface 62b) of the light exit surface 62 has a surface having the same curvature as the upper light exit surface 62 when exiting from the small curvature surface 62b. Is emitted to the outside at a smaller angle of refraction than the light emitted from.

  For this reason, light emitted from the small curvature surface 62b to the outside and having the largest influence of chromatic aberration is lowered by the small curvature surface 62b to form a lower portion of the cutoff line of the passing light distribution pattern, A main light distribution pattern with less influence of chromatic aberration can be formed.

  That is, light emitted from the light source 2 toward the first reflecting surface 11 of the first reflector 10 is reflected by the first reflecting surface 11, and the reflected light is transmitted through the lower side of the lens 60 and is emitted from the light source 2. Forms a passing light distribution pattern (main light distribution pattern) of A shown in FIGS. 6 and 7 in which the influence of chromatic aberration is suppressed.

  Next, the light source 2 is radially emitted from the light source 2 located at the position of the one focal point F1 and is formed of a spheroidal reflecting surface of the second reflector 20 located obliquely in front of the light source 2 (near the front end of the first reflector 10). The light traveling toward the second reflecting surface 21 is reflected by the second reflecting surface 21 toward the other focal point F3, and the reflected light is reflected by the third reflecting surface 41 of the third reflector 40 below the light incident surface 61 of the lens 60. The light is reflected toward the side surface.

  Then, the light irradiated on the lower surface of the light incident surface 61 of the lens 60 is refracted by the light incident surface 61 and enters the lens 60, and passes through the inside of the lens 60 at the lower end surface of the light exit surface 62 (small curvature surface 62 b). ) The light is transmitted toward the virtual focal point F3 'of the focal point F3 located in the vicinity, and is once collected at the position of the virtual focal point F3'. Is emitted.

  Also in this case, similarly to the light forming the main light distribution pattern, when the light exits from the small curvature surface 62b, the light exits outside at a smaller refraction angle than the light exiting from the surface having the same curvature as the upper light exit surface 62. Is emitted. Therefore, as shown in FIG. 8 (conventional light distribution pattern), the main light distribution pattern A and the overhead sign light distribution pattern B are separated from each other and the conventional light distribution pattern having the dark area 70 therebetween. The emitted light is lowered to form a light distribution pattern downward from the conventional position.

  That is, the light emitted from the light source 2 toward the second reflecting surface 21 of the second reflector 20 is reflected by the second reflecting surface 21, and the reflected light is reflected by the third reflecting surface 41 of the third reflector 40 by the lens 60. , And the reflected light is transmitted through the lower side of the lens, and the emitted light is overlapped with the main light distribution pattern A in FIG. 6 and FIG. To form

  As a result, there is no dark portion between the main light distribution pattern A and the overhead sign light distribution pattern B, and the visibility of the driver in front of and at an obliquely upper front during night driving is increased, and the driver is obstructed in front of the vehicle. An object can be reliably recognized (see FIG. 6).

  Next, the reflection emitted radially from the light source 2 and reflected toward the rear side of the focal point F3 by the fourth reflection surface 31 of the fourth reflector 30 extending obliquely downward from the front end of the second reflector 20 to the front. The light is reflected by the third reflecting surface 41 of the third reflector 40 toward the central surface of the light incident surface 61 of the lens 60.

  Then, the light applied to the central surface of the light incident surface 61 of the lens 60 is slightly refracted by the light incident surface 61 and enters the lens 60, and passes through the inside of the lens 60 toward the central surface of the light emitting surface 62, The light is emitted obliquely upward and forward from the center plane.

  As a result, as shown in FIG. 7, the overhead sign distribution is reduced so as to cover the original area of the overhead sign distribution pattern B lowered from the conventional light distribution pattern (see FIG. 8). A light distribution pattern (auxiliary light distribution pattern C) for irradiating a further upper region of the light pattern is formed.

  As a result, there is no dark portion between the main light distribution pattern A and the overhead sign light distribution pattern B, and by illuminating the conventional area of the overhead sign light distribution pattern that is lowered downward, during night driving, It is possible to further improve the visibility of the driver with respect to an overhead sign area provided with an overhead sign such as a road sign or a road information board.

  As described above, the lamp of the present invention includes the first reflecting surface 11 of the first reflector 10 contributing to the formation of the passing light distribution pattern and the second reflector 20 of the second reflector 20 contributing to the formation of the overhead sign light distribution pattern. It has a reflecting surface 21 and a third reflecting surface 41 of the third reflector 40, has a shape in which light passing through the focal point F2 is emitted forward as parallel light, and a part of light reflected by the first reflecting surface 11 and second reflection. A lens 60 having a surface (small curvature surface 62b) of a portion (small curvature portion 62a) for directing the light reflected by the third reflection surface 41 downward after reflection on the surface 21 is provided.

  Thus, a low-pass light distribution pattern in which the influence of chromatic aberration is suppressed is formed, and the low-pass light distribution pattern and the overhead sign light distribution pattern are not connected to each other, and a dark portion does not occur therebetween.

  Further, a small curvature surface 62b of a small curvature portion 62a for directing light incident into the lens 60 downward is provided on the light exit surface 62 at the lower end of the lens 60. Therefore, the chromatic aberration of the passing light distribution pattern can be suppressed and the overhead sign light distribution pattern can be moved downward by the minimum necessary partial deformation of the lens 60, and the passing light distribution pattern is formed through the central portion of the lens 60. Does not adversely affect the light that contributes to the light.

  Further, on the second reflecting surface 21 of the second reflector 20, the reflected light reflected on the front surface reaches the position of the third reflecting surface 41 farther away from the focal point F2 position on the third reflecting surface 41. Therefore, the fourth reflecting surface 31 of the fourth reflector 30 is formed on the front end side of the second reflecting surface 21 by a curved reflecting surface that curves downward from the second reflecting surface 21. The light reaching the position farther forward on the front side from the focal point F2 is directed toward the focal point F2, so that the light reflected by the third reflecting surface 41, transmitted through the lens 60, and emitted diagonally forward and upward.

  As a result, by supplementing the area after the overhead sign light distribution pattern has moved downward with the auxiliary light distribution pattern, a light distribution pattern with good visibility as a whole can be formed.

  Instead of providing a small curvature portion 62a composed of a small curvature surface 62b at the lower end of the light exit surface 62 of the lens 60, as shown in FIG. 9 (a partially enlarged explanatory view of the light exit surface at the upper end of the lens), At the upper end of the light exit surface 62 of the light guide surface 60, a large curvature portion 62c formed of a large curvature surface 62d having a curvature set to be larger than the curvature of the curved surface of the lower light exit surface 62 and protruding rearward is provided. It may be provided.

  In this case, the virtual focal point F3 ′ of the focal point F3 is set at a position near the large curvature surface 62d of the large curvature portion 62c of the light exit surface 62 of the lens 60. Thus, the reflected light reflected toward the upper side of the lens 60 by the third reflecting surface 41 of the third reflector 40 passes through the upper side in the lens 60, and the direction in which the light emitted from the large curvature surface 62d faces the lower side. Can be lowered.

  Further, instead of changing the curvature of a part of the light exit surface 62 of the lens 60, the curvature of a part of the light incident surface 61 of the lens 60 may be changed. That is, a small curvature portion formed of a small curvature surface is provided below the light incident surface 61 of the lens 60, and the virtual focal point F3 'of the focal point F3 is set at a position near the small curvature portion. Alternatively, a large curvature portion having a large curvature surface is provided above the light incidence surface 61 of the lens 60, and the virtual focal point F3 ′ of the focal point F3 is set at a position near the large curvature portion. Thereby, the light passing through the incident surface can be directed downward.

  As a result, the formation area of the overhead sign light distribution pattern is lowered, and the light distribution patterns of the main light distribution pattern and the overhead sign light distribution pattern are partially overlapped and formed.

  The vehicle lighting device of FIG. 10 differs from the vehicle lighting device of the above embodiment in that the virtual focal point F3 ′ of the focal point F3 is changed to the center of the light exit surface 62 of the lens 60 by changing the inclination angle of the third reflection surface 41. The light reflected by the third reflection surface 41 passes through the position of the virtual focal point F3 'so as to be positioned slightly below. Further, a part of the light emitting surface 62 of the lens 60 where the virtual focal point F3 'is located is formed to have a smaller curvature than the curvature that makes the light passing through the focal point F2 parallel light.

  The virtual focus F3 'may be located slightly above the center of the light exit surface 62 of the lens 60. In this case, a part of the light exit surface 62 of the lens 60 where the virtual focal point F3 'is located is formed to have a curvature larger than the curvature that makes the light passing through the focal point F2 into parallel light.

  As a result, light from the third reflecting surface 41 passing slightly below the center of the light emitting surface 62 of the lens 60 can be reduced, and the overhead sign light distribution pattern can be connected to the main light distribution pattern.

  Also in this case, similarly to the above-described embodiment, instead of changing the curvature of a part of the light exit surface 62 of the lens 60, the curvature of a part of the light incident surface 61 of the lens 60 may be changed. Accordingly, light passing through the light incident surface 61 of the lens 60 can be directed downward.

DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Light source 10 ... 1st reflector 11 ... Reflection surface (1st reflection surface) of 1st reflector
20 ... second reflector 21 ... reflection surface of the second reflector (second reflection surface)
30 Fourth reflector 31 Reflective surface of fourth reflector (fourth reflective surface)
40... Third reflector 41... Reflecting surface of the third reflector (third reflecting surface)
50 Shade 60 Lens 61 Light entrance surface 62 Light exit surface 62a Small curvature portion 62b Small curvature surface 62c Large curvature portion 62d Large curvature surface 70 Dark area

Claims (6)

Light source,
A first reflecting surface located above the light source;
A second reflecting surface located near a front end of the first reflecting surface;
A third reflecting surface located below the second reflecting surface;
A lens located in front of the third reflecting surface;
Comprising a shade located between the light source and the lens,
The first reflecting surface has a first focal point at the position of the light source, and is a spheroidal reflecting surface based on a spheroidal surface having a second focal point at the front end of the shade,
The second reflecting surface is a spheroid having a first focal point as one focal point and a third focal point serving as the other focal point on a substantially extended line passing from the second reflecting surface to the third reflecting surface. Including a spheroidal reflective surface to be the base tone,
The third reflecting surface is a reflecting surface that extends obliquely downward and forward from a position near the second focal point,
The lens has the second focal point as a focal point, and at least a part of a lower portion of a light exit surface on the front surface of the lens is formed to have a smaller curvature than a curvature that makes light passing through the second focal point into parallel light. A vehicular lamp, which is a projection-type lens having a bent shape and wherein the virtual focal point of the third focal point is located near a lower part of a light exit surface on the front surface of the lens. Light source,
A first reflecting surface located above the light source;
A second reflecting surface located near a front end of the first reflecting surface;
A third reflecting surface located below the second reflecting surface;
A lens located in front of the third reflecting surface;
Comprising a shade located between the light source and the lens,
The first reflecting surface has a first focal point at the position of the light source, and is a spheroidal reflecting surface based on a spheroidal surface having a second focal point at the front end of the shade,
The second reflecting surface is a spheroid having a first focal point as one focal point and a third focal point serving as the other focal point on a substantially extended line passing from the second reflecting surface to the third reflecting surface. Including a spheroidal reflective surface to be the base tone,
The third reflecting surface is a reflecting surface that extends obliquely downward and forward from a position near the second focal point,
The lens has the second focal point as a focal point, and at least a part of a lower portion of a light incident surface on the rear surface of the lens is formed to have a smaller curvature than a curvature that makes light passing through the second focal point into parallel light. A vehicle lamp, which is a projection-type lens having a bent shape and wherein the virtual focal point of the third focal point is located near a lower portion of a light incident surface behind the lens. Light source,
A first reflecting surface located above the light source;
A second reflecting surface located near a front end of the first reflecting surface;
A third reflecting surface located below the second reflecting surface;
A lens located in front of the third reflecting surface;
Comprising a shade located between the light source and the lens,
The first reflecting surface has a first focal point at the position of the light source, and is a spheroidal reflecting surface based on a spheroidal surface having a second focal point at the front end of the shade,
The second reflecting surface is a spheroid having a first focal point as one focal point and a third focal point serving as the other focal point on a substantially extended line passing from the second reflecting surface to the third reflecting surface. Including a spheroidal reflective surface to be the base tone,
The third reflecting surface is a reflecting surface that extends obliquely downward and forward from a position near the second focal point,
The lens has the second focal point as a focal point, and at least a part of an upper portion of a light exit surface on the front surface of the lens is formed to have a curvature larger than a curvature that makes light passing through the second focal point into parallel light. A vehicular lamp, which is a projection type lens having a shape and wherein the virtual focal point of the third focal point is located near an upper part of a light exit surface on the front surface of the lens. Light source,
A first reflecting surface located above the light source;
A second reflecting surface located near a front end of the first reflecting surface;
A third reflecting surface located below the second reflecting surface;
A lens located in front of the third reflecting surface;
Comprising a shade located between the light source and the lens,
The first reflecting surface has a first focal point at the position of the light source, and is a spheroidal reflecting surface based on a spheroidal surface having a second focal point at the front end of the shade,
The second reflecting surface is a spheroid having a first focal point as one focal point and a third focal point serving as the other focal point on a substantially extended line passing from the second reflecting surface to the third reflecting surface. Including a spheroidal reflective surface to be the base tone,
The third reflecting surface is a reflecting surface that extends obliquely downward and forward from a position near the second focal point,
The lens has the second focal point as a focal point, and at least a part of an upper portion of a light incident surface on the rear surface of the lens is formed to have a curvature larger than a curvature that makes light passing through the second focal point into parallel light. A vehicular lamp, which is a projection type lens having a shape and wherein the virtual focal point of the third focal point is located near an upper part of a light incident surface behind the lens. A fourth reflecting surface near a front end of the second reflecting surface;
The fourth reflection surface is a reflection surface that is curved and inclined inward with respect to a vicinity of a front end of the second reflection surface, and reflects light from the light source backward from the third focal point. The vehicle lighting device according to claim 4.   The vehicle lamp according to any one of claims 1 to 5, wherein the light source is a semiconductor light emitting element.