JP2011081975A - Vehicle headlight and reflector unit therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a downsized vehicle headlight and achieve the characteristics necessary for light distribution. <P>SOLUTION: The headlight 1 for a vehicle is provided with a first reflector 30 which has a rotating paraboloidal face as a base with an optical axis 31 as a central axis and has a first reflecting face 32 formed on the right side of the optical axis 31 in a horizontal direction, a second reflector 40 which is located on the left side of the optical axis 31 and has a second reflecting face 42 having a rotating paraboloidal face as a base with an optical axis 41 as a central axis, a first light emitting body 10 arranged near the focal point of the first reflecting face 32, and a second light emitting body 20 arranged near the focal point of the second reflecting face 42. The focal distance of the second reflecting face 42 is set to be shorter than that of the first reflecting face 32. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle headlamp and a reflector unit, and more particularly to a vehicle headlamp and a reflector unit that use a plurality of light emitters.

  2. Description of the Related Art Conventionally, there are vehicle headlamps in which two light emitting diodes and two reflectors are unitized (see, for example, Patent Document 1). The reflecting surface of one of the reflectors reflects the light of one of the light emitting diodes forward, and forms a light distribution pattern as an aggregate of inverted images of the light emitting diodes arranged in the horizontal direction on the front virtual screen. Thereby, a horizontal cut-off line is formed. The reflection surface of the other reflector reflects the light of the other light emitting diode forward, and the light distribution pattern as a collection of inverted images of the light emitting diodes arranged obliquely with respect to the horizontal direction on the front virtual screen Form. Thereby, an oblique cut-off line is formed.

JP 2004-303639 A

However, the size of the vehicle headlamp described in Patent Document 1 increases. That is, if the reflecting surface is configured in consideration of the emission characteristics of the two light emitting diodes and obtaining the necessary light distribution, the vehicle headlamp becomes longer in the left-right direction (vehicle width direction). Moreover, in order to dissipate the heat | fever emitted from the light emitting diode, since a heat sink is installed in the rear part of a reflector, the vehicle headlamp will become long also in the front-back direction.
Therefore, the problem to be solved by the present invention is to make it possible to obtain necessary light distribution characteristics while miniaturizing the vehicle headlamp.

  In order to solve the above problems, a vehicle headlamp according to the present invention is based on a paraboloid of revolution having a first axis extending in the front-rear direction as a central axis, and one side of the first axis in the horizontal direction. The first reflector having the first reflecting surface formed in the above and a rotating paraboloid with the second axis extending in the front-rear direction as a central axis, and the horizontal direction of the first reflecting surface with respect to the first axis A second reflector having a second reflecting surface formed on the opposite side and vertically below the second axis and parallel to the first reflector in the horizontal direction, and a focal point of the first reflecting surface A first light emitter disposed in the vicinity of the second light emitter and a second light emitter disposed in the vicinity of the focal point of the second reflective surface, the focal length of the second reflective surface being greater than the focal length of the first reflective surface Was also shortened.

  Preferably, the second reflecting surface reflects light emitted from the second light emitter so as to diffuse forward in a horizontal direction, and a vertex of the second reflecting surface is a front side of a vertex of the first reflecting surface. It is characterized by being arranged in.

  Preferably, the first light emitter is installed in a direction inclined downward with respect to a horizontal direction, one side of the first light emitter is provided in parallel to the front-rear direction, and the first reflecting surface is the first reflecting surface. A first reflective region that reflects light of the first light emitter forward so that one side of one light emitter is projected as a horizontal cut-off line, and an oblique cut that rises one side of the first light emitter at a predetermined angle from the horizontal cut-off line A second reflection region that reflects the light of the first light emitter forward so as to project as offline, the second light emitter is installed downward, and one side of the second light emitter is horizontally oriented And the second reflecting surface reflects light of the first light emitter forward so as to project one side of the first light emitter as a horizontal cut-off line.

  In order to solve the above problems, a reflector unit according to the present invention is based on a paraboloid of revolution having a first axis extending in the front-rear direction as a central axis, and is formed on one side of the first axis in the horizontal direction. Based on a first reflector having a first reflecting surface and a parabolic surface centering on a second axis extending in the front-rear direction, and on the opposite side of the first reflecting surface in the horizontal direction with respect to the first axis, And a second reflecting surface formed on the lower side of the second axis in the vertical direction, the second reflecting surface arranged in parallel with the first reflector, and a focal length of the second reflecting surface Is shorter than the focal length of the first reflecting surface.

In the present invention, since the focal length of the second reflecting surface is shorter than the focal length of the first reflecting surface, the reflected light from the second reflecting surface can be broadened. The spread can be reduced, and the reflected light from the first reflecting surface can be increased in illuminance. Since the first reflector having the first reflection surface and the second reflector having the second reflection surface are arranged in parallel in the horizontal direction, the light distribution pattern of the reflected light by the first reflection surface and the second reflection A desired light distribution pattern can be obtained by a combination with the light distribution pattern of the reflected light from the surface.
In addition, since the focal length of the second reflecting surface is short, the second light emitter can be installed close to the second reflecting surface, and even if the aperture size of the second reflecting surface is small, the distribution of the reflected light by the second reflecting surface is small. A sufficient illuminance of the light pattern can be secured. Therefore, the opening size of the second reflecting surface can be reduced. Therefore, the vehicle headlamp can be reduced in size. In particular, since the first reflector and the second reflector are juxtaposed in the horizontal direction, and the reflection surface of the second reflector is formed on the lower side in the vertical direction of the second axis, the second reflector and the second reflection surface are made smaller. The vehicle headlamp can be downsized.

It is a perspective view of the vehicle headlamp in the first embodiment of the present invention. It is a top view of the vehicle headlamp in the same embodiment. It is a top view of the light-emitting body used for the vehicle headlamp in the embodiment. It is a side view of the light-emitting body used for the vehicle headlamp in the embodiment. It is a side view of the light-emitting body used for the vehicle headlamp in the embodiment. It is a front view of the vehicle headlamp in the same embodiment. It is a cross-sectional view of the vehicle headlamp in the same embodiment. It is drawing which expanded and showed a part of FIG. It is the figure which showed the light distribution pattern by the 1st reflector of the vehicle headlamp in the embodiment. It is the figure which showed the light distribution pattern by the 2nd reflector of the vehicle headlamp in the embodiment. It is the figure which showed the synthesis | combination of the light distribution pattern by the 1st reflector of the vehicle headlamp in the embodiment, and the light distribution pattern by a 2nd reflector. It is a perspective view of the vehicle headlamp in 2nd embodiment of this invention. It is a top view of the vehicle headlamp in the same embodiment. It is a front view of the vehicle headlamp in the same embodiment. It is a side view of the vehicle headlamp in the same embodiment.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

[First Embodiment]
FIG. 1 is a perspective view of a vehicle headlamp 1. FIG. 2 is a top view of the vehicle headlamp 1.

  As shown in FIGS. 1 to 2, the vehicle headlamp 1 is a lamp configured to form a low beam (passing) light distribution pattern. The vehicle headlamp 1 includes a reflector unit 2, a first light emitter 10, a second light emitter 20, and the like.

FIG. 3 is a plan view of the first light emitter 10. FIG. 4 is a side view of the first light emitter 10. FIG. 5 is a side view of the first light emitter 10. As shown in FIGS. 3 to 5, the first light emitter 10 is mounted on the substrate 15, and the hemispherical mold lens 16 is formed on the substrate 15 so as to cover the first light emitter 10. The first light emitter 10 is provided in a rectangular shape having long sides 11 and 12 and short sides 13 and 14 in plan view. The first light emitter 10 is a light emitting diode chip.
The second light emitter 20 is provided in the same manner as the first light emitter 10, and the same reference numerals are given to the configuration related to the second light emitter 20 and the configuration related to the first light emitter 10.

FIG. 6 is a front view of the vehicle headlamp 1. FIG. 7 is a cross-sectional view of the vehicle headlamp 1.
As shown in FIGS. 6 and 7, the reflector unit 2 includes a first reflector 30 on the right side (opposite lane side), a second reflector 40 on the lower left side, and a decoration unit 50 on the upper left side. The 1st reflector 30, the 2nd reflector 40, and the decoration part 50 are shape | molded integrally, and the 1st reflector 30 and the 2nd reflector 40 are paralleled in the horizontal direction.

The first reflector 30 has a first reflecting surface 32 based on a paraboloid of revolution having an optical axis 31 extending in the front-rear direction as a central axis. Specifically, the first reflecting surface 32 of the first reflector 30 is formed on the right side of the optical axis 31 and is based on a semi-rotating paraboloid on the right side of the optical axis 31.
The second reflector 40 has a second reflecting surface 42 based on a paraboloid of revolution having an optical axis 41 extending in the front-rear direction as a central axis. Specifically, the second reflecting surface 42 of the second reflector 40 is formed below the optical axis 41 and is based on a semi-rotating paraboloid below the optical axis 41. The optical axis 41 by the second reflecting surface 42 is on the left side (own lane side) of the optical axis 31 by the first reflecting surface 32, and the second reflecting surface 42 is on the left side (own lane side) of the optical axis 31. Is formed. In FIG. 6, the reflecting surfaces 32 and 42 are filled with a pattern. A transparent transparent cover is provided in front of the reflecting surfaces 32 and 42 and the decorative portion 50, but the illustration of the transparent cover is omitted for easy viewing of the drawing.

The distance from the vertex 36 of the first reflecting surface 32 to the focal point F1 (the distance from the vertex of the rotating paraboloid to the focal point is referred to as the focal length) is longer than the focal length of the second reflecting surface 42. Specifically, the focal length of the first reflecting surface 32 is 20 to 23 mm, and the focal length of the second reflecting surface 42 is 8 to 10 mm.
As shown in FIG. 6, the focal point F <b> 1 of the first reflecting surface 32 is arranged on the right side and the upper side of the focal point F <b> 2 of the second reflecting surface 42.
As shown in FIG. 7, the focal point F <b> 2 of the second reflecting surface 42 is disposed in front of the focal point F <b> 1 of the first reflecting surface 32.
The apex 46 of the second reflecting surface 42 is located in front of the apex 36 of the first reflecting surface 32.
The rear end of the second reflector 40 is disposed in front of the rear end of the first reflector 30, and the right end portion 49 of the second reflector 40 and the left end portion of the first reflector 30 overlap in the left-right direction.

  As shown in FIG. 6, the holder 60 is provided at the rear portion of the decorative portion 50, the substrate 15 related to the second light emitter 20 is attached to the lower surface of the holder 60, and the substrate 15 related to the first light emitter 10 is attached to the holder 60. It is attached to the side.

  The first light emitter 10 is disposed in the vicinity of the focal point F <b> 1 of the first reflecting surface 32. Specifically, the first light emitter 10 is installed in a direction inclined downward by a predetermined angle (for example, 15 °) with respect to the horizontal right direction, and the long sides 11 and 12 of the first light emitter 10 are horizontally and in the front-rear direction. The long side 11 of the first light emitter 10 is disposed below the long side 12.

  FIG. 8 is an enlarged view of a part of FIG. As shown in FIGS. 6, 7, and 8, the right end portion 51 of the decoration portion 50 is disposed in front of the first light emitter 10 and the molded lens 16, and the right end portion 51 of the decoration portion 50 and the first light emitter 10 are arranged. While overlapping in the left-right direction, the right end 51 of the decorative portion 50 and the mold lens 16 overlap in the left-right direction. Specifically, the right end surface 52 of the decorative portion 50 is disposed on the right side of the vertex of the mold lens 16. Therefore, the right end portion 51 of the decorative portion 50 functions as a light shielding portion that shields the front side of the first light emitter 10, and the first light emitter 10 and its mold lens 16 are seen from the front as shown in FIG. It is hidden behind the right end 51 of 50. Therefore, the direct light emitted from the first light emitter 10 is blocked by the right end portion 51 of the decorative portion 50, and the generation of dazzling light can be suppressed.

As shown in FIGS. 6 and 7, the second light emitter 20 is disposed in the vicinity of the focal point F <b> 2 of the second reflecting surface 42. Specifically, the second light emitter 20 is installed downward, the long sides 11 and 12 of the second light emitter 20 are installed horizontally and horizontally, and the long side 11 of the second light emitter 20 is longer than the long side 12. Are arranged on the front side, and the left and right positions of the midpoint of the front long side 11 are aligned with the left and right positions of the focal point F2 of the second reflecting surface 42, and the front and rear positions of the midpoint of the front long side 11 are second reflected. It is slightly behind the front-rear position of the focal point F2 of the surface 42.
Similarly to the first light emitter 10, the second light emitter 20 is arranged behind the lower end of the decorative portion 50, and the second light emitter 20 and its mold lens 16 are behind the lower end of the decorative portion 50 when viewed from the front. Hiding in. Therefore, the lower end part of the decoration part 50 functions as a light shielding part. Therefore, the direct light emitted from the second light emitter 20 is shielded by the lower end portion of the decorative portion 50, and generation of dazzling light can be suppressed.

  The first reflection surface 32 includes a first reflection region 33 for forming a horizontal cutoff light distribution, a second reflection region 34 for forming an oblique cutoff light distribution, and a third reflection region 35 for forming an overhead sign light distribution. It consists of. The first reflecting surface 32 reflects the light emitted from the first light emitter 10 forward, and forms a light distribution pattern on a virtual screen that is a predetermined distance away from the first reflecting surface 32. FIG. 9 is a view showing a light distribution pattern formed by the first reflecting surface 32. In FIG. 9, the horizontal axis represents the angle from the optical axis 31 in the left-right direction, and the vertical axis represents the angle from the optical axis 31 in the horizontal direction.

As shown in FIG. 9, the light distribution pattern formed by the first reflective surface 32 includes a far-sighted light distribution pattern 91 formed by the first reflective region 33 and the second reflective region 34, and a third reflective region 35. And an overhead sign light distribution pattern 92 formed by
The far-sight viewing light distribution pattern 91 is a light distribution pattern for left-hand traffic, and has a horizontal cut-off line 91a on the upper edge on the right side of the right and left direction at zero degrees, and on the upper edge on the left side of the left and right direction in zero degrees. It has an oblique cut-off line 91b that rises at 15 ° from the horizontal cut-off line 91a. The horizontal cut-off line 91a is parallel to the horizontal line and is formed slightly below the vertical direction of zero degrees.
The overhead sign light distribution pattern 92 is formed in a substantially rectangular shape that is substantially long in the left-right direction. The overhead sign light distribution pattern 92 is formed above a horizontal line passing through the optical axis 31 (the vertical angle is zero).

  The first reflection region 33 is optically designed so that the inverted image of the first light emitter 10 is arranged in the horizontal direction and projected onto the virtual screen. Here, the first reflective region 33 includes a plurality of reflective elements 33a which are surfaces having different curvatures from the reference surface, with the paraboloid of the first reflective surface 32 as a reference surface. These reflecting elements 33a reflect the light emitted from the first light emitter 10 forward and reflect the light emitted from the first light emitter 10 below the horizontal line for reflection in the vertical direction (vertical direction). To deflect.

  These reflecting elements 33a invert the image of the first light emitter 10 and project it on a virtual screen. Specifically, the reflecting elements 33 a are arranged so that the lower long side 11 of the first light emitter 10 is parallel to the horizontal line and slightly below the horizontal line passing through the optical axis 31. A reverse image of the light emitter 10 is projected onto a virtual screen. Accordingly, the horizontal cut-off line 91 a is formed by the lower long side 11 of the first light emitter 10.

  The second reflective area 34 tilts the inverted image of the first light emitter 10 at a predetermined angle (for example, oblique 15 °), arranges the inverted image of the first light emitter 10 in the oblique direction, and projects it on the virtual screen. Designed to be optical. Here, the second reflection region 34 is formed from a plurality of reflection elements 34a, which are surfaces having a rotational paraboloid related to the first reflection surface 32 as a reference surface and a conical surface having an axis in the left-right direction as an approximation of the reference surface. Become. The upper boundary line 34b of the second reflection region 34 is horizontal, and the first light emitter 10 is disposed on the extension of the upper boundary line 34b when viewed from the front. Further, the lower boundary line 34c of the second reflection region 34 is inclined by a predetermined angle (for example, 15 °) with respect to the upper boundary line 34b when viewed from the front, and the first light emission is performed on the extension of the lower boundary line 34c when viewed from the front. A body 10 is arranged.

  The plurality of reflective elements 34a in the second reflective region 34 reflect light emitted from the first light emitter 10 forward, invert the image of the first light emitter 10, and further tilt it by 15 ° to virtually Project onto the screen. Specifically, these reflecting elements 34 a project an image of the first light emitter 10 so that the lower long side 11 of the first light emitter 10 is inclined by 15 ° with respect to the horizontal line. Therefore, the oblique cut-off line 91 b is formed by the lower long side 11 of the first light emitter 10.

  Since the first light emitter 10 is arranged so that the longitudinal direction of the first light emitter 10 is the front-rear direction, the far-sight-seeing light distribution pattern 91 is formed long in the horizontal direction (left-right direction).

  The third reflecting region 35 is composed of a single reflecting element 35a that is a cylindrical surface with the rotational paraboloid of the first reflecting surface 32 as a reference surface and an axis in the left-right direction that approximates the reference surface. The reflection element 35a reflects the light emitted from the first light emitter 10 forward, and deflects the light emitted from the first light emitter 10 above the horizontal line for reflection in the vertical direction. Here, the reflective element 35 a inverts the image of the first light emitter 10 and projects it on the virtual screen above the horizontal line passing through the optical axis 31. Specifically, the reflective element 35 a performs the first light emission so that the long side 11 and the long side 12 of the first light emitter 10 are parallel to the horizontal line and slightly above the horizontal line passing through the optical axis 31. Project an image of the body 10. Thereby, an overhead sign light distribution pattern 92 is formed.

  The second reflecting surface 42 reflects light emitted from the second light emitter 20 forward, and forms a near-side visual light distribution pattern on a virtual screen that is a predetermined distance ahead of the second reflecting surface 42. FIG. 10 is a view showing the near-side visual light distribution pattern 93 formed by the second reflecting surface 42. In FIG. 10, the horizontal axis represents the angle from the front horizontal axis to the left-right direction, and the vertical axis represents the angle from the front horizontal axis to the horizontal direction.

  As shown in FIG. 10, the near-side visual light distribution pattern 93 is formed in a substantially rectangular shape that is substantially elongated in the left-right direction by the second reflecting surface 42, and has a horizontal cut-off line 93 a at the upper edge.

  The second reflecting surface 42 is optically designed so that the image of the second light emitter 20 is arranged in the horizontal direction and projected onto the virtual screen. Here, the second reflecting surface 42 includes a plurality of reflecting elements 42a, which are surfaces having different curvatures from the reference surface, with the paraboloid of the second reflecting surface 42 as a reference surface. These reflecting elements 42a reflect the light emitted from the second light emitter 20 forward, and deflect the light emitted from the second light emitter 20 below the horizontal line for reflection in the vertical direction. For the reflection in the horizontal direction, the light emitted from the second light emitter 20 is diffused in the left-right direction toward the front.

  These reflective elements 42a invert the image of the second light emitter 20 and project it on a virtual screen. Specifically, the reflective elements 42a are configured to emit the second light emission so that the long side 11 on the front side of the second light emitter 20 is parallel to the horizontal line and slightly below the horizontal line passing through the optical axis 41. Project an image of the body 20. Accordingly, the horizontal cutoff line 93a is formed by the long side 11 on the front side of the second light emitter 20.

FIG. 11 shows a combination of the light distribution pattern formed by the first reflection surface 32 and the light distribution pattern formed by the second reflection surface 42.
Since the focal length of the second reflecting surface 42 is shorter than the focal length of the first reflecting surface 32, the projection magnification of the image of the second light emitter 20 onto the virtual screen is such that the image of the first light emitter 10 onto the virtual screen. It is larger than the projection magnification. Therefore, as shown in FIG. 11, the near-side viewing light distribution pattern 93 is wider in the left-right direction than the far-viewing light distribution pattern 91.

  The second reflecting surface 42 diffuses the light emitted from the second light emitter 20 forward and in the left-right direction, but the horizontal diffusion range by the second reflecting surface 42 is the reflection regions 33 and 34 of the first reflecting surface 32. Is larger than the horizontal diffusion range. Therefore, as shown in FIG. 11, the near-side viewing light distribution pattern 93 is wider in the left-right direction than the far-viewing light distribution pattern 91.

  The second reflection surface 42 that diffuses and reflects light emitted from the second light emitter 20 in the horizontal direction is disposed on the front side of the first reflection surface 32 that diffuses and reflects light emitted from the first light emitter 10 in the horizontal direction. Therefore, the light reflected by the second reflecting surface 42 is not shielded by the first reflector 30. Therefore, it is possible to prevent the near side visual light distribution pattern 93 from becoming dark.

  On the other hand, even if the first reflecting surface 32 is disposed behind the second reflecting surface 42, the first reflecting surface 32 diffuses and reflects light emitted from the first light emitter 10 in the horizontal direction. The light reflected by the reflecting surface 32 is not easily shielded by the second reflector 40. Therefore, it is possible to prevent the distant viewing light distribution pattern 91 from becoming dark.

  And since the 2nd reflective surface 42 is arrange | positioned ahead of the 1st reflective surface 32, and the vertex 46 of the 2nd reflective surface 42 is arrange | positioned ahead of the vertex 36 of the 1st reflective surface 32, it is 2nd reflector. The rear end of 40 can be installed in front of the rear end of the first reflector 30. Therefore, an effective space can be provided behind the second reflector 40, and various members and mechanisms can be installed in such an effective space. For example, a heat sink for cooling the light emitters 10 and 20 and a drive circuit for driving the light emitters 10 and 20 can be installed in an effective space.

  Further, since the second reflection surface 42 forms the light distribution pattern 93 for visually recognizing the near side, sufficient illumination intensity of the light distribution pattern 93 is ensured even if the opening size of the second reflection surface 42 is small. can do. Therefore, an effective space can be provided on the right side of the first reflector 30 and above the second reflector 40 as viewed from the front. That is, an installation space for the decorative portion 50 and an installation space for the holder 60 can be taken. Further, even if a heat sink for cooling the light emitters 10 and 20 and a drive circuit for driving the light emitters 10 and 20 are attached to the holder 60, such a heat sink or drive circuit is located on the right side of the first reflector 30. And since it can install in the upper direction of the 2nd reflector 40, the enlargement of the vehicle headlamp 1 can be suppressed.

As described above, according to the present embodiment, since the focal length of the second reflecting surface 42 is shorter than the focal length of the first reflecting surface 32, the reflected light from the second reflecting surface 42 is assumed to spread. In addition, the spread of the reflected light from the first reflecting surface 32 can be reduced, and the reflected light from the first reflecting surface 32 can have high illuminance. Since the first reflector 30 having the first reflection surface 32 and the second reflector 40 having the second reflection surface 42 are arranged in parallel in the horizontal direction, the light distribution pattern 91 by the first reflection surface 32 and A desired light distribution pattern can be obtained by a combination with the light distribution pattern 93 by the second reflecting surface 42 (see FIG. 11).
Further, since the focal length of the second reflecting surface 42 is short, the second light emitter 20 can be installed close to the second reflecting surface 42, and even if the opening size of the second reflecting surface 42 is small, the second reflecting surface 42. The illumination intensity of the light distribution pattern 93 can be sufficiently secured. Therefore, the opening size of the second reflecting surface 42 can be reduced. Therefore, the vehicle headlamp 1 can be reduced in size. In particular, the first reflector 30 and the second reflector 40 are juxtaposed in the horizontal direction, and the second reflecting surface 42 of the second reflector 40 is formed below the optical axis 41 in the vertical direction. The vehicle headlamp 1 can be reduced in size by reducing the two reflecting surfaces 42.
Further, since the vertex 46 of the second reflecting surface 42 is disposed in front of the vertex 36 of the first reflecting surface 31, the focal length of the second reflecting surface 42 is shorter than the focal length of the first reflecting surface 32, Even if the light of the second luminous body 20 is reflected by the second reflecting surface 42 so as to diffuse in the horizontal direction, the reflected light can be prevented from being blocked by the first reflector 30.
The light of the first light emitter 10 is reflected by the first reflecting surface 32, but the focal length of the first reflecting surface 32 is longer than the focal length of the second reflecting surface 42. Since the light diffusion range is narrower than the light diffusion range reflected by the second reflection surface 42, the light reflected by the first reflection surface 32 can be prevented from being blocked by the second reflector 40.

In the above embodiment, the vehicle headlamp 1 is for left-hand traffic, but may be for right-hand traffic. In this case, the entire vehicle headlamp 1 is reversed left and right as viewed from the front.
In the above embodiment, the light emitters 10 and 20 are rectangular light emitting diode chips using a semiconductor. However, the light emitters are not limited to light emitting diodes as long as the light emitters have a rectangular shape.

[Second Embodiment]
FIG. 12 is a perspective view of a vehicle headlamp 1A according to the second embodiment. FIG. 13 is a top view of the vehicle headlamp 1A. FIG. 14 is a front view of the vehicle headlamp 1A. FIG. 15 is a side view of the vehicle headlamp 1A. Parts corresponding to each other between the vehicle headlamp 1A in the second embodiment and the vehicle headlamp 1 in the first embodiment are denoted by the same reference numerals.

  Hereinafter, when the mutually corresponding portions are provided between the vehicle headlamp 1A in the second embodiment and the vehicle headlamp 1 in the first embodiment, the description thereof is omitted. The difference between the corresponding parts will be described.

  In the first embodiment, the decorative portion 50 is disposed on the second reflector 40. However, in the second embodiment, the third reflector 70 is disposed on the second reflector 40 instead of the decorative portion 50. It is arranged. The 3rd reflector 70, the 1st reflector 30, and the 2nd reflector 40 are integrally formed, and the reflector unit 2 is comprised by integrating these.

  The third reflector 70 is a high beam reflector. The third reflector 70 has a third reflecting surface 72 based on a paraboloid of revolution having an optical axis extending in the front-rear direction as a central axis. The third reflecting surface 72 is formed above the optical axis, and is based on a semi-rotating paraboloid above the optical axis.

  The focal length of the third reflective surface 72 is shorter than the focal length of the first reflective surface 32. Specifically, the focal length of the third reflecting surface 72 is 8 to 12 mm.

  The focal point F3 of the third reflecting surface 72 is disposed above the focal point F2 of the second reflecting surface 42. The horizontal position of the focal point F3 of the third reflective surface 72 is aligned with the horizontal position of the focal point F2 of the second reflective surface. The position of the focal point F3 of the third reflecting surface 72 in the front-rear direction is also aligned with the position of the focal point F2 of the second reflecting surface 42 in the left-right direction.

The focal point F3 of the third reflecting surface 72 is disposed on the left side of the focal point F1 of the first reflecting surface 32. The focal point F3 of the third reflective surface 72 is disposed in front of the focal point F1 of the first reflective surface 32.
The vertex of the third reflective surface 72 is located on the front side of the vertex of the first reflective surface 32.
The rear end of the third reflector 70 is disposed in front of the rear end of the first reflector 30.

  The third light emitter 80 is disposed near the focal point F3 of the third reflecting surface 72. The third light emitter 80 is a light emitting diode chip provided in a rectangular shape. The third light emitter 80 is mounted on the substrate and covered with a hemispherical mold lens, similarly to the light emitters 10 and 20.

  The third light emitter 80 is mounted on the upper surface of a plate-like holder 60 disposed in the horizontal direction on the front side of the second reflecting surface 42 and the third reflecting surface 72. The third light emitter 80 is installed upward, and the long side of the third light emitter 80 is installed horizontally and in the left-right direction.

  The third reflecting surface 72 reflects the light emitted from the third light emitter 80 toward the front, and forms a spot-like light distribution pattern on a virtual screen that is a predetermined distance ahead of the third reflecting surface 72. . Specifically, the third reflecting surface 72 projects a reverse image of the third light emitter 80 at positions of zero degrees in the vertical direction and zero degrees in the horizontal direction on the virtual screen.

  A heat sink 85 is provided behind the second reflector 40 and the third reflector 70. The holder 60 penetrates the portion between the second reflecting surface 42 and the third reflecting surface 72 rearward, and the holder 60 and the heat sink 85 are connected. Since the heat sink 85 is connected to the holder 60, the heat of the light emitters 10, 20, 80 is radiated by the heat sink 85.

  Except for what has been described above, portions corresponding to each other are provided in the same manner between the vehicle headlamp 1A in the second embodiment and the vehicle headlamp 1 in the first embodiment.

Also in the present embodiment, it is possible to prevent the reflected light from the second reflecting surface 42 from being blocked by the first reflector 30 and the near side visual distribution pattern becoming dark.
Moreover, it is difficult for the reflected light from the first reflecting surface 32 to be blocked by the second reflector 40, and it is possible to prevent the distant viewing light distribution pattern from becoming dark.
Moreover, even if an effective space is provided behind the reflectors 40 and 80 and the heat sink 85 is installed in the effective space, the vehicle headlamp 1A can be prevented from being enlarged.

DESCRIPTION OF SYMBOLS 1, 1A Vehicle headlamp 1A Vehicle headlamp 2 Reflector unit 10 First light emitter 11 Long side 20 Second light emitter 30 First reflector 31 Optical axis 32 First reflection surface 33 First reflection area 34 Second Reflection area 36 Vertex 40 Second reflector 41 Optical axis 42 Second reflection surface 46 Vertex 91 Distant viewing light distribution pattern 91a Horizontal cut-off line 91b Oblique cut-off line 93 Front-side viewing light distribution pattern 93a Horizontal cut-off line F1, F2, F3 focus

Claims (4)

A first reflector having a first parabolic surface formed on one side of the first axis in the horizontal direction, with a rotary paraboloid centered on a first axis extending in the front-rear direction as a central axis;
A rotary paraboloid having a second axis extending in the front-rear direction as a central axis is used as a keynote, and is on the opposite side of the first reflecting surface in the horizontal direction with respect to the first axis, and below the second axis in the vertical direction. A second reflector having a second reflecting surface formed in parallel with the first reflector in a horizontal direction;
A first light emitter disposed near the focal point of the first reflecting surface;
A second light emitter disposed near the focal point of the second reflecting surface,
The vehicular headlamp characterized in that a focal length of the second reflecting surface is shorter than a focal length of the first reflecting surface. The second reflecting surface reflects the light emitted from the second light emitter to diffuse forward in the horizontal direction,
2. The vehicle headlamp according to claim 1, wherein the vertex of the second reflecting surface is disposed in front of the vertex of the first reflecting surface. The first light emitter is installed in a direction inclined downward with respect to the horizontal direction,
One side of the first light emitter is provided parallel to the front-rear direction,
The first reflecting surface reflects the light of the first light emitter forward so as to project one side of the first light emitter as a horizontal cutoff line, and one side of the first light emitter is the horizontal. A second reflection region that reflects the light of the first light emitter forward so as to project as an oblique cut-off line that rises at a predetermined angle from the cut-off line, and
The second illuminant is installed downward;
One side of the second light emitter is provided parallel to the horizontal direction,
The vehicle front according to claim 1, wherein the second reflecting surface reflects light of the first light emitter forward so as to project one side of the first light emitter as a horizontal cutoff line. Lighting. A first reflector having a first parabolic surface formed on one side of the first axis in the horizontal direction, with a rotary paraboloid centered on a first axis extending in the front-rear direction as a central axis;
A rotary paraboloid having a second axis extending in the front-rear direction as a central axis is used as a keynote, and is on the opposite side of the first reflecting surface in the horizontal direction with respect to the first axis, and below the second axis in the vertical direction. A second reflecting surface formed on the first reflector and the second reflector arranged in parallel in the horizontal direction,
A reflector unit, wherein a focal length of the second reflecting surface is shorter than a focal length of the first reflecting surface.

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