JP2009245637A - Vehicular reflection type headlamp unit using semiconductor light source - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular reflection type headlamp unit using a semiconductor light source, capable of forming a light distribution pattern for a headlamp, even if the unit is single. <P>SOLUTION: This vehicular reflection type head lamp unit includes the semiconductor light source disposed with a light emitting surface turned upward and downward when a lighting fixture is viewed from the front, a first reflecting surface, a second reflecting surface, a third reflecting surface, and a fourth reflecting surface. The first reflecting surface is a reflecting surface to diffusively reflect light irradiated from the semiconductor light source toward the second reflecting surface in a horizontal direction, the second reflecting surface is a reflecting surface to form a first light distribution pattern including a spot part by reflecting reflected light from the first reflecting surface, the third reflecting surface is a reflecting surface to form a second light distribution pattern including an elbow part projecting upward beyond a horizontal line by reflecting light irradiated from the semiconductor light source, and the fourth reflecting surface is a light reflecting surface to form a third light distribution pattern by reflecting light irradiated from the semiconductor light source. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular reflective headlamp unit using a semiconductor light source, and more particularly to a vehicular reflective headlamp unit capable of forming a headlamp light distribution pattern even when used alone.

  Conventionally, a vehicular headlamp using a semiconductor light source such as an LED is known (see, for example, Patent Document 1).

  FIG. 25 is a diagram for explaining the configuration of the vehicle headlamp described in Patent Document 1.

  As shown in FIG. 25, the vehicular headlamp described in Patent Document 1 includes two front illumination lamp units 30 ′, two front illumination lamp units 40 ′, and a side that are different in reflector size, shape, and the like. The direction illumination lamp units 50A ′ and 50B ′ are provided.

In the vehicle headlamp described in Patent Document 1, the low-beam light distribution pattern PL, which is a headlamp light distribution pattern, is obtained from two front illumination lamp units 30 'as shown in FIG. Light distribution pattern PL1 formed by irradiation, light distribution pattern PL2 formed by light irradiation from two front illumination lamp units 40 ', and light from two side illumination lamp units 50A' and 50B ' It is formed as a combined light distribution pattern with light distribution patterns PL3A and PL3B formed by irradiation.
JP-A-2005-141919

  As described above, conventionally, in order to form a light distribution pattern for a headlamp using a semiconductor light source such as an LED, the size and shape of the reflector according to the target light distribution pattern from the light emission characteristics of the semiconductor light source such as an LED. A plurality of lamp units (in the above example, a total of four types of lamp units: two front illumination lamp units 30 ′, two front illumination lamp units 40 ′, and side illumination lamp units 50A ′ and 50B ′). ) And must be combined.

  The present invention has been made in view of such circumstances, and provides a reflective headlamp unit for a vehicle using a semiconductor light source, which can form a light distribution pattern for a headlamp even when used alone. The purpose is to do.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a reflection type headlamp unit mounted on a vehicle and forming a headlamp light distribution pattern, with a light emitting surface facing frontward or downward of the lamp. A semiconductor light source disposed; and a first reflective surface, a second reflective surface, a third reflective surface, and a fourth reflective surface, wherein the first reflective surface is disposed in front of the light emitting surface of the semiconductor light source, Of the light emitted from the light emitting surface toward the front of the light emitting surface is diffusely reflected in the horizontal direction toward the second reflecting surface mainly toward the semiconductor light source toward the left or right side of the lamp front view. The headlamp light distribution pattern is a reflection surface, and the second reflection surface is disposed on the one side with respect to the semiconductor light source, and diffuses and reflects the reflected light from the first reflection surface in the horizontal direction. Including the spot part which is part of A reflective surface forming a light distribution pattern, wherein the third reflective surface is disposed on the other side opposite to the one side with respect to the semiconductor light source and on the front side in front of the lamp, and emits light from the semiconductor light source Of the light emitted toward the front of the surface, the light reflected mainly toward the other side of the semiconductor light source opposite to the one side and toward the front side of the front of the lamp is reflected. A reflection surface forming a second light distribution pattern including an elbow portion protruding above a horizontal line that is a part of the light pattern, wherein the fourth reflection surface is the one side with respect to the semiconductor light source The other side opposite to the one side with respect to the semiconductor light source, which is disposed on the other side opposite to the lamp and viewed from the front side of the lamp and irradiated from the semiconductor light source toward the front of the light emitting surface Reflecting light toward the back side of the lamp Characterized in that it is a reflecting surface forming the third light distribution pattern which is a part of the light distribution pattern for the head lamp.

  According to the first aspect of the present invention, since the first reflecting surface, the second reflecting surface, the third reflecting surface, and the fourth reflecting surface are provided, a plurality of lamp units are not combined as in the conventional case, and are independent. Even so, the first light distribution pattern including the spot portion formed by the second reflection of the first reflection surface and the second reflection surface, the second including the elbow portion formed by the one reflection of the third reflection surface. It is possible to form a headlamp light distribution pattern that is a combined light distribution pattern of the third light distribution pattern formed by one-time reflection of the light distribution pattern and the fourth reflection surface.

  The invention according to claim 2 is the invention according to claim 1, wherein the first reflecting surface is a reflecting surface of a parabolic column system in which a focal line is set in the vicinity of the semiconductor light source. The reflecting surface is a parabolic reflecting surface whose focal point is set on the quasi-line of the first reflecting surface, and the third reflecting surface is a rotating paraboloidal system whose focal point is set near the semiconductor light source. The fourth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the semiconductor light source.

  According to the invention described in claim 2, since the second reflecting surface is a parabolic reflecting surface whose focal point is set on the quasi-line of the first reflecting surface, the reflected light from the first reflecting surface. The first light distribution pattern has a cutoff line defined by the light source image of the semiconductor light source projected so that the contour of the light source image is parallel to the horizontal line, and includes a spot portion. It is possible to form a light pattern (that is, a light distribution pattern suitable for forming a cut-off line of the light distribution pattern for headlamps because the contour of the light source image is parallel to the horizontal line).

  According to the invention described in claim 2, since the third reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the semiconductor light source, the semiconductor light source faces the front of the light emitting surface. Of the irradiated light, the light source mainly reflects the light toward the other side opposite to the one side with respect to the semiconductor light source and toward the front side of the front of the lamp, and as a second light distribution pattern, the contour of the light source image Has a cut-off line defined by the light source image of the semiconductor light source projected so as to be parallel to the horizontal line, and includes a light distribution pattern including an elbow portion protruding above the horizontal line (that is, the light source image) Therefore, it is possible to form a light distribution pattern suitable for forming a cut-off line of the headlamp light distribution pattern.

  According to the second aspect of the present invention, since the fourth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the semiconductor light source, the semiconductor light source faces the front of the light emitting surface. Of the irradiated light, the light source mainly reflects the light toward the other side opposite to the one side with respect to the semiconductor light source and toward the back of the lamp, and the contour of the light source image is obtained as a third light distribution pattern. Is a light distribution pattern having a cutoff line defined by the light source image of the semiconductor light source projected so as to be parallel to the horizontal line (that is, for the headlamp because the contour of the light source image is parallel to the horizontal line) It is possible to form a light distribution pattern suitable for forming a cut-off line of the light distribution pattern.

  Therefore, according to the second aspect of the present invention, a spot formed by twice reflection of the first reflecting surface and the second reflecting surface, even if it is a single unit without combining a plurality of lamp units as in the prior art. A first light distribution pattern including a portion, a second light distribution pattern including an elbow portion formed by a single reflection of the third reflection surface, and a third light distribution pattern formed by a single reflection of the fourth reflection surface. It becomes possible to form a light distribution pattern for a headlamp having a clear cut-off line that is a light distribution pattern.

  The invention according to claim 3 is the invention according to claim 1, wherein the first reflecting surface is a reflecting surface of a parabolic column system in which a focal line is set in the vicinity of the semiconductor light source, and the second reflecting surface is the second reflecting surface. The reflection surface reflects the reflected light from the first reflection surface, and is defined by the light source image of the semiconductor light source projected as the first light distribution pattern so that the contour of the light source image is parallel to a horizontal line. The third reflection is a parabolic reflection surface that has a cut-off line and forms a light distribution pattern including the spot portion, and a focal point is set on a quasi-line of the first reflection surface. The surface of the light emitted from the semiconductor light source toward the front of the light emitting surface mainly emits light toward the other side opposite to the one side with respect to the semiconductor light source and toward the front side of the lamp front view. Reflects and outlines the light source image as the second light distribution pattern The focal point has a cut-off line defined by a light source image of the semiconductor light source projected so as to be parallel to a horizontal line, and forms a light distribution pattern including an elbow part protruding above the horizontal line. It is a reflecting surface of a rotary paraboloid system set in the vicinity of the semiconductor light source, and the fourth reflecting surface is mainly used for the semiconductor light source among the light emitted from the semiconductor light source toward the front of the light emitting surface. On the other hand, the light that is directed toward the other side opposite to the one side and toward the back of the lamp is reflected and projected as the third light distribution pattern so that the contour of the light source image is parallel to the horizontal line. The focal point is a rotating paraboloidal reflecting surface set in the vicinity of the semiconductor light source, which forms a light distribution pattern having a cutoff line defined by a light source image of the semiconductor light source.

  According to the invention described in claim 3, the second reflecting surface is defined as the first light distribution pattern by the light source image of the semiconductor light source projected so that the contour of the light source image is parallel to the horizontal line. A light distribution pattern having a cut-off line and including a spot portion (that is, a light distribution suitable for forming a cut-off line of a head lamp light distribution pattern because the contour of the light source image is parallel to the horizontal line) Pattern) can be formed.

  According to a third aspect of the present invention, the third reflecting surface is opposite to the one side of the light mainly irradiated from the semiconductor light source toward the front of the light emitting surface. The second light distribution pattern is defined by the light source image of the semiconductor light source projected so that the contour of the light source image is parallel to the horizontal line. And a light distribution pattern that includes an elbow that protrudes above the horizontal line (that is, the contour of the light source image is parallel to the horizontal line. It is possible to form a light distribution pattern suitable for forming.

  According to the invention described in claim 3, the fourth reflecting surface is opposite to the one side of the light mainly irradiated from the semiconductor light source toward the front of the light emitting surface. The third light distribution pattern is defined by the light source image of the semiconductor light source projected so that the contour of the light source image is parallel to the horizontal line. A light distribution pattern having a cut-off line (that is, a light distribution pattern suitable for forming a cut-off line of the head lamp light distribution pattern because the contour of the light source image is parallel to the horizontal line). It becomes possible.

  Therefore, according to the third aspect of the present invention, a spot formed by twice reflection of the first reflecting surface and the second reflecting surface, even if it is a single unit without combining a plurality of lamp units as in the prior art. A first light distribution pattern including a portion, a second light distribution pattern including an elbow portion formed by a single reflection of the third reflection surface, and a third light distribution pattern formed by a single reflection of the fourth reflection surface. It becomes possible to form a light distribution pattern for a headlamp having a clear cut-off line that is a light distribution pattern.

  According to a fourth aspect of the invention, there is provided the fifth aspect of the invention according to the first to third aspects, further comprising fifth reflective surfaces arranged on both sides of the first reflective surface, wherein the fifth reflective surface is formed from the semiconductor light source. Of the light emitted toward the front of the light emitting surface, the second reflective surface is a reflective surface that diffusely reflects light directed toward the one side mainly toward the semiconductor light source toward the second reflective surface. The surface diffuses and reflects the reflected light from the fifth reflecting surface in the horizontal direction to form a fourth light distribution pattern that is a part of the headlamp light distribution pattern.

  According to the invention described in claim 4, since the first reflecting surface, the second reflecting surface, the third reflecting surface, the fourth reflecting surface and the fifth reflecting surface are provided, a plurality of lamp units are provided as in the prior art. The first light distribution pattern including the spot portion formed by the second reflection of the first reflection surface and the second reflection surface, and the elbow formed by one reflection of the third reflection surface, even if they are not combined. Second light distribution pattern including a portion, a third light distribution pattern formed by one reflection of the fourth reflection surface, and a fourth light distribution formed by two reflections of the fifth reflection surface and the second reflection surface It is possible to form a headlamp light distribution pattern which is a combined light distribution pattern of patterns.

  The invention according to claim 5 is the invention according to claim 4, wherein the fifth reflecting surface is a reflecting surface of a rotating paraboloidal system whose focal point is set in the vicinity of the semiconductor light source, and the second reflecting surface. The surface diffuses and reflects the reflected light from the fifth reflecting surface in the horizontal direction and is projected as the fourth light distribution pattern so that the contour of the light source image is inclined with respect to the horizontal line. A light distribution pattern having a cut-off line defined by is formed.

  According to the invention described in claim 5, the second reflecting surface diffuses and reflects the reflected light from the fifth reflecting surface in the horizontal direction, and the outline of the light source image is inclined with respect to the horizontal line as the fourth light distribution pattern. A light distribution pattern having a cut-off line defined by the light source image of the semiconductor light source projected so as to be vertical (ie, the vertical direction suitable for the light distribution pattern for headlamps because the contour of the light source image is inclined with respect to the horizontal line) Wide light distribution pattern) can be formed.

  Therefore, according to the fifth aspect of the present invention, a spot formed by twice reflection of the first reflecting surface and the second reflecting surface, even if it is a single unit without combining a plurality of lamp units as in the prior art. A first light distribution pattern including a portion, a second light distribution pattern including an elbow portion formed by a single reflection of the third reflection surface, a third light distribution pattern formed by a single reflection of the fourth reflection surface, and The headlamp light distribution having a clear cut-off line, which is a combined light distribution pattern of the fourth light distribution pattern formed by the second reflection of the fifth reflection surface and the second reflection surface, and wide in the vertical direction A pattern can be formed.

  The invention according to claim 6 is a reflective headlamp unit that is mounted on a vehicle and forms a light distribution pattern for a headlamp, wherein a plurality of semiconductor light emitting elements are arranged with the light emitting surface facing frontward or downward of the lamp. And a first reflecting surface, a second reflecting surface, a third reflecting surface, and a fourth reflecting surface, wherein the first reflecting surface is disposed in front of the light emitting surfaces of the plurality of semiconductor light emitting elements, and the plurality of semiconductor light emitting devices. Of the light emitted from the element toward the front of the light emitting surface, the light mainly directed toward the left or right side of the lamp front view with respect to the arrangement direction of the plurality of semiconductor light emitting elements is directed toward the second reflecting surface. The second reflection surface is disposed on the one side with respect to the arrangement direction of the plurality of semiconductor light emitting elements, and horizontally reflects the reflected light from the first reflection surface. The headlamp diffusely reflects in the direction A reflection surface that forms a first light distribution pattern including a spot portion that is a part of the light distribution pattern, wherein the third reflection surface is the one side with respect to an arrangement direction of the plurality of semiconductor light emitting elements. Of the light emitted from the plurality of semiconductor light emitting elements toward the front side of the light emitting surface and disposed on the opposite opposite side and the front side of the lamp front view, mainly with respect to the arrangement direction of the plurality of semiconductor light emitting elements A second distribution including an elbow portion that reflects light toward the other side opposite to the one side and toward the front side of the lamp front view and that protrudes above a horizontal line that is a part of the light distribution pattern for the headlamp. A reflecting surface that forms a light pattern, and the fourth reflecting surface is disposed on the other side opposite to the one side with respect to the arrangement direction of the plurality of semiconductor light emitting elements and on the far side from the front of the lamp, In front of the light emitting surface from the plurality of semiconductor light emitting elements Of the light emitted toward the light, mainly reflects the light toward the other side opposite to the one side and the lamp front view back side with respect to the arrangement direction of the plurality of semiconductor light emitting elements, It is a reflective surface that forms a third light distribution pattern that is a part of the light distribution pattern for headlamps.

  According to the sixth aspect of the present invention, since the first reflecting surface, the second reflecting surface, the third reflecting surface, and the fourth reflecting surface are provided, a plurality of lamp units are not combined as in the prior art. Even so, the first light distribution pattern including the spot portion formed by the second reflection of the first reflection surface and the second reflection surface, the second including the elbow portion formed by the one reflection of the third reflection surface. It is possible to form a headlamp light distribution pattern that is a combined light distribution pattern of the third light distribution pattern formed by one-time reflection of the light distribution pattern and the fourth reflection surface.

  The invention according to claim 7 is the invention according to claim 6, wherein the first reflecting surface is a parabolic columnar reflecting surface in which a focal line is set in the vicinity of the plurality of semiconductor light emitting elements, The second reflecting surface is a parabolic reflecting surface whose focal point is set on the quasi-line of the first reflecting surface, and the third reflecting surface is set near the plurality of semiconductor light emitting elements. The fourth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the plurality of semiconductor light emitting elements.

  According to the invention described in claim 7, since the second reflecting surface is a parabolic reflecting surface whose focal point is set on the quasi-line of the first reflecting surface, the reflected light from the first reflecting surface. As a first light distribution pattern, the light source image of the plurality of semiconductor light emitting elements projected so that the contour of the light source image (the longitudinal direction of the light source image of the plurality of semiconductor light emitting elements) is parallel to the horizontal line. Light distribution pattern that has a defined cut-off line and includes a spot (ie, the outline of the light source image is parallel to the horizontal line, so it is suitable for forming a cut-off line for the light distribution pattern for headlamps. Light distribution pattern) can be formed.

  According to the invention of claim 7, since the third reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the plurality of semiconductor light emitting devices, the third reflecting surface is separated from the plurality of semiconductor light emitting devices. Of the light emitted toward the front of the light emitting surface, mainly reflects the light directed toward the other side opposite to the one side and the front side of the lamp in the direction of arrangement of the plurality of semiconductor light emitting elements. The second light distribution pattern is defined by the light source images of the plurality of semiconductor light emitting elements projected so that the outline of the light source image (the longitudinal direction of the light source images of the plurality of semiconductor light emitting elements) is parallel to the horizontal line. And a light distribution pattern that includes an elbow that protrudes above the horizontal line (that is, the contour of the light source image is parallel to the horizontal line. Form It is possible to form a light distribution pattern) suitable for.

  According to the seventh aspect of the present invention, the fourth reflecting surface is a rotating paraboloidal reflecting surface whose focal point is set in the vicinity of the plurality of semiconductor light emitting devices. Of the light emitted toward the front of the light emitting surface, the light mainly reflected toward the other side opposite to the one side and the back side of the lamp in the direction of arrangement of the plurality of semiconductor light emitting elements is reflected. The third light distribution pattern is defined by the light source images of the plurality of semiconductor light emitting elements projected so that the contour of the light source image (the longitudinal direction of the light source images of the plurality of semiconductor light emitting elements) is parallel to the horizontal line. A light distribution pattern having a cut-off line (that is, a light distribution pattern suitable for forming a cut-off line of the head lamp light distribution pattern because the contour of the light source image is parallel to the horizontal line). Made possible .

  Therefore, according to the seventh aspect of the present invention, a spot formed by two reflections of the first reflecting surface and the second reflecting surface, even if it is a single unit without combining a plurality of lamp units as in the prior art. A first light distribution pattern including a portion, a second light distribution pattern including an elbow portion formed by a single reflection of the third reflection surface, and a third light distribution pattern formed by a single reflection of the fourth reflection surface. It becomes possible to form a light distribution pattern for a headlamp having a clear cut-off line that is a light distribution pattern.

  The invention according to claim 8 is the invention according to claim 6, wherein the first reflecting surface is a reflecting surface of a parabolic column system in which a focal line is set in the vicinity of the plurality of semiconductor light emitting elements, The second reflection surface reflects the reflected light from the first reflection surface, and the plurality of semiconductor light emission projected as the first light distribution pattern so that a contour of a light source image is parallel to a horizontal line. A parabolic reflecting surface having a cut-off line defined by a light source image of the element and forming a light distribution pattern including the spot portion, the focal point being set on a quasi-line of the first reflecting surface; And the third reflecting surface is mainly the one side of the light emitted from the plurality of semiconductor light emitting elements toward the front of the light emitting surface with respect to the arrangement direction of the plurality of semiconductor light emitting elements. Light going to the other side opposite the front of the lamp The second light distribution pattern is reflected and has a cut-off line defined by the light source images of the plurality of semiconductor light emitting elements projected so that the contour of the light source image is parallel to the horizontal line, and the horizontal line Forming a light distribution pattern including an elbow part that protrudes further upward, and having a focal point set in the vicinity of the plurality of semiconductor light emitting elements and being a paraboloidal reflecting surface; Of the light emitted from the semiconductor light emitting element toward the front of the light emitting surface, mainly the other side opposite to the one side and the back side in front of the lamp with respect to the arrangement direction of the plurality of semiconductor light emitting elements The third light distribution pattern has a cut-off line defined by the light source images of the plurality of semiconductor light emitting elements projected so that the contour of the light source image is parallel to the horizontal line. Forming a light pattern, wherein the focus is a reflective surface of the plurality of semiconductor light emitting elements parabolic system set in the vicinity.

  According to the eighth aspect of the present invention, the second reflecting surface has the light source image contour (longitudinal direction of the light source images of the plurality of semiconductor light emitting elements) parallel to the horizontal line as the first light distribution pattern. And a light distribution pattern that includes a spot line defined by light source images of a plurality of semiconductor light emitting elements projected onto the light source pattern (that is, a headlamp because the contour of the light source image is parallel to the horizontal line) It is possible to form a light distribution pattern suitable for forming a cut-off line of the light distribution pattern for use.

  According to the invention of claim 8, the third reflecting surface is mainly in the arrangement direction of the plurality of semiconductor light emitting elements among the light irradiated from the plurality of semiconductor light emitting elements toward the front of the light emitting surface. On the other hand, the light that is directed to the other side opposite to the one side and toward the front side of the front of the lamp is reflected, and as the second light distribution pattern, the outline of the light source image (the longitudinal direction of the light source images of the plurality of semiconductor light emitting elements) Has a cut-off line defined by the light source images of the plurality of semiconductor light emitting elements projected so as to be parallel to the horizontal line, and includes a light distribution pattern including an elbow portion protruding above the horizontal line (that is, Since the contour of the light source image is parallel to the horizontal line, it is possible to form a light distribution pattern suitable for forming a cut-off line for the headlamp light distribution pattern.

  According to the invention described in claim 8, the fourth reflecting surface is mainly in the arrangement direction of the plurality of semiconductor light emitting elements among the light irradiated from the plurality of semiconductor light emitting elements toward the front of the light emitting surface. On the other hand, the light that is directed to the other side opposite to the one side and toward the rear side of the lamp front view is reflected, and as a third light distribution pattern, the outline of the light source image (the longitudinal direction of the light source images of the plurality of semiconductor light emitting elements) Is a light distribution pattern having a cutoff line defined by the light source images of the plurality of semiconductor light emitting elements projected so as to be parallel to the horizontal line (i.e., the contour of the light source image is parallel to the horizontal line, It is possible to form a light distribution pattern suitable for forming a cut-off line of the headlamp light distribution pattern.

  Therefore, according to the eighth aspect of the present invention, a spot formed by twice reflection of the first reflecting surface and the second reflecting surface, even if it is a single unit without combining a plurality of lamp units as in the prior art. A first light distribution pattern including a portion, a second light distribution pattern including an elbow portion formed by a single reflection of the third reflection surface, and a third light distribution pattern formed by a single reflection of the fourth reflection surface. It becomes possible to form a light distribution pattern for a headlamp having a clear cut-off line that is a light distribution pattern.

  The invention according to claim 9 is the invention according to any one of claims 6 to 8, further comprising fifth reflecting surfaces disposed on both sides of the first reflecting surface, wherein the fifth reflecting surface is the plurality of semiconductors. Of the light emitted from the light emitting element toward the front of the light emitting surface, the light mainly directed toward the one side with respect to the arrangement direction of the plurality of semiconductor light emitting elements is diffusely reflected toward the second reflecting surface. The second reflecting surface is a reflecting surface, and diffuses and reflects the reflected light from the fifth reflecting surface in the horizontal direction to form a fourth light distribution pattern which is a part of the headlamp light distribution pattern. It is characterized by.

  According to the ninth aspect of the present invention, since the first reflecting surface, the second reflecting surface, the third reflecting surface, the fourth reflecting surface, and the fifth reflecting surface are provided, a plurality of lamp units are provided as in the related art. The first light distribution pattern including the spot portion formed by the second reflection of the first reflection surface and the second reflection surface, and the elbow formed by one reflection of the third reflection surface, even if they are not combined. Second light distribution pattern including a portion, a third light distribution pattern formed by one reflection of the fourth reflection surface, and a fourth light distribution formed by two reflections of the fifth reflection surface and the second reflection surface It is possible to form a headlamp light distribution pattern which is a combined light distribution pattern of patterns.

  The invention according to claim 10 is the invention according to claim 9, wherein the fifth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the plurality of semiconductor light emitting elements, The second reflecting surface diffuses and reflects the reflected light from the fifth reflecting surface in the horizontal direction, and the outline of the light source image (the longitudinal direction of the light source images of the plurality of semiconductor light emitting elements) is a horizontal line as the fourth light distribution pattern. A light distribution pattern having a cut-off line defined by light source images of the plurality of semiconductor light emitting elements projected so as to be inclined with respect to the light is formed.

  According to the tenth aspect of the present invention, the second reflecting surface diffuses and reflects the reflected light from the fifth reflecting surface in the horizontal direction, and the contour of the light source image (a plurality of semiconductor light emitting elements) is formed as the fourth light distribution pattern. The light distribution pattern having a cutoff line defined by the light source images of the plurality of semiconductor light emitting elements projected so that the longitudinal direction of the light source image is inclined with respect to the horizontal line (that is, the contour of the light source image is relative to the horizontal line) Therefore, it is possible to form a light distribution pattern that is wide in the vertical direction suitable for the light distribution pattern for headlamps.

  Therefore, according to the tenth aspect of the present invention, a spot formed by two-time reflection of the first reflecting surface and the second reflecting surface without combining a plurality of lamp units as in the prior art. A first light distribution pattern including a portion, a second light distribution pattern including an elbow portion formed by a single reflection of the third reflection surface, a third light distribution pattern formed by a single reflection of the fourth reflection surface, and The headlamp light distribution having a clear cut-off line, which is a combined light distribution pattern of the fourth light distribution pattern formed by the second reflection of the fifth reflection surface and the second reflection surface, and wide in the vertical direction A pattern can be formed.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is independent, it becomes possible to provide the reflective headlamp unit for vehicles using a semiconductor light source which can form the light distribution pattern for headlamps.

  Hereinafter, a reflective lamp unit for a vehicle using a semiconductor light emitting element according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of the vehicle reflective lamp unit of the present embodiment.

  The vehicle reflective lamp unit 100 of the present embodiment is applied to a vehicle headlamp such as an automobile headlamp and an auxiliary headlamp. As shown in FIG. A first reflector 20 having a reflective surface 21, a second reflector 30 having a second reflective surface 31 and a third reflective surface 32, a light guide member 40, and a heat sink 50 attached to the upper surface of the lamp as shown in FIG. I have. FIG. 2 is a perspective view of the vehicle reflective lamp unit 100 in which the heat sink 50 is attached to the configuration shown in FIG.

  The semiconductor light source 10 is, for example, an LED package in which a plurality of LED chips 11 as semiconductor light emitting elements (for example, a single color LED chip such as pseudo white or an RGB three color LED chip) are packaged.

  As shown in FIG. 1 and the like, the plurality of LED chips 11 have a light emitting surface 10a facing obliquely lower right (ie, obliquely lower left toward the vehicle traveling direction) when viewed from the front of the lamp, and as shown in FIG. Thus, it arrange | positions on the straight line (on the axis | shaft slightly inclined in the horizontal direction with respect to the lamp optical-axis AX direction). FIG. 1 shows an example in which four LED chips 11 are arranged on a straight line (on an axis slightly inclined in the horizontal direction with respect to the lamp optical axis AX direction).

  The first reflecting surface 21 and the second reflecting surface 31 reflect the irradiation light from the semiconductor light source 10 twice to form a predetermined light distribution pattern that is a part of the head lamp light distribution pattern. Configure the system.

  The third reflecting surface 32 constitutes a one-time reflection optical system for reflecting the irradiation light from the semiconductor light source 10 once to form a predetermined light distribution pattern that is a part of the headlamp light distribution pattern. .

[Twice reflection optical system]
As shown in FIG. 3, the first reflecting surface 21 and the second reflecting surface 31 as the twice-reflection optical system mainly include the irradiation light irradiated from the semiconductor light source 10 toward the front surface of the light emitting surface 10 a. FIG. 4 shows light traveling toward the left side of the lamp front view (left side in FIG. 3, that is, right side in the vehicle traveling direction) with respect to the arrangement direction of the plurality of LED chips 11 (direction perpendicular to the paper surface in FIG. 3). In this way, the optical system reflects the light twice and forms a light distribution pattern which is a part of the headlamp light distribution pattern.

  With respect to the arrangement direction of the plurality of LED chips 11 (direction orthogonal to the paper surface in FIG. 3), the light traveling toward the left side of the lamp front view (left side in FIG. 3, that is, right side in the vehicle traveling direction) is shown in FIG. As shown, the luminous flux in a conical range indicated by α (0 to 70 °) in FIG. 3 with respect to the optical axis 0 ° of the semiconductor light source 10 × four LED chips 11 (7 of the amount of light emitted from the four LED chips 11). It is a relatively high-luminance luminous flux for about 80%).

  Hereinafter, the details of the first reflecting surface 21 and the second reflecting surface 31 will be described.

[Configuration of the first reflecting surface 21]
As shown in FIG. 1, FIG. 5, etc., the first reflective surface 21 is composed of a central reflective surface 21c disposed at the center, and double-sided reflective surfaces 21R and 21L disposed on both sides of the central reflective surface 21c. Yes.

[Configuration of Central Reflecting Surface 21c]
As shown in FIGS. 1, 3, etc., the central reflecting surface 21 c (corresponding to the first reflecting surface of the present invention) is disposed in front of the light emitting surface 10 a of the semiconductor light source 10 and in the vicinity of the semiconductor light source 10. Yes.

  The central reflecting surface 21c is mainly a left side (left side in FIG. 3) when viewed from the front of the lamp with respect to the arrangement direction of the plurality of LED chips 11 in the irradiation light irradiated from the semiconductor light source 10 toward the front of the light emitting surface 10a. That is, it is a reflection surface that diffuses and reflects light toward the right side in the vehicle traveling direction toward the second reflection surface 31 in the horizontal direction.

Specifically, the central reflecting surface 21c (corresponding to the first reflecting surface of the present invention) is, as shown in FIGS. 6 and 7, a focal line F _L1 (a plurality of focal points) extending in the arrangement direction of the plurality of LED chips 11. (Also referred to as a focal line or bus) and F ₁ is a parabolic columnar reflecting surface set in the vicinity of the semiconductor light source 10. FIG. 6 is a cross-sectional view of the central reflecting surface 21 c cut along a vertical plane including the semiconductor light source 10. FIG. 7 is a top view of the central reflecting surface 21c viewed from the direction indicated by the arrow A in FIG.

As shown in FIGS. 4 and 6, the central reflecting surface 21 c does not diffuse the light emitted from the semiconductor light source 10 (the light source image of the semiconductor light source 10) in the vertical direction (that is, maintains the positional relationship in the vertical direction). As it is, the light is diffusely reflected (or projected) in the horizontal direction toward the second reflecting surface 31. As shown in FIG. 6, the reflected light from the central reflecting surface 21c appears as if it is emitted from a point on the quasi-line 21c _d (also referred to as a virtual image line or focal line) of the central reflecting surface 21c.

  The reflected light from the central reflecting surface 21c (the light source image of the semiconductor light source 10) becomes a light source image that is projected so that the contour or ridge line (longitudinal direction) of the light source image of the semiconductor light source 10 is parallel to the horizontal line. For this reason, the reflected light from the central reflecting surface 21c (the light source image of the semiconductor light source 10) is convenient for forming a headlamp light distribution pattern (horizontal cut-off line).

  As shown in FIG. 4, the reflected light from the central reflecting surface 21c (the light source image of the semiconductor light source 10) is diffused only in the horizontal direction so as not to be condensed by the second reflecting surface 31, and will be described later. In addition, the light distribution pattern P1 (the light distribution pattern P1 having the cut-off line CL1 and including the spot portion SP, which is a part of the light distribution pattern for headlamps, see FIG. 11) is formed.

[Configuration of the reflecting surfaces 21R and 21L on both sides]
As shown in FIG. 1, FIG. 5, etc., the both-side reflecting surfaces 21R and 21L (corresponding to the fifth reflecting surface of the present invention) are respectively on the left and right sides of the central reflecting surface 21c (corresponding to the first reflecting surface of the present invention). Has been placed.

  The both-side reflecting surfaces 21R and 21L are mainly in the left side of the lamp when viewed from the front of the lamp with respect to the arrangement direction of the plurality of LED chips 11 in the irradiation light irradiated from the semiconductor light source 10 toward the front of the light emitting surface 10a (in FIG. 3). This is a reflecting surface that diffuses and reflects light toward the left side, that is, toward the right side in the vehicle traveling direction, toward the second reflecting surface 31.

  1 and 5 show examples in which the boundary between the central reflection surface 21c and the both-side reflection surfaces 21R and 21L is divided by edges, but the central reflection surface 21c and both-side reflections are not formed without forming the edges. The surfaces 21R and 21L may be smoothly continuous.

Specifically, both side reflecting surfaces 21R, (corresponding to the fifth reflecting surface of the present invention) 21L, as shown in FIG. 8, the reflection of the rotary paraboloidal the focus F ₂ is set near the semiconductor light sources 10 Surface.

  As shown in FIG. 8, the reflecting surfaces 21 </ b> R and 21 </ b> L diffusely reflect (or project) the irradiation light from the semiconductor light source 10 (the light source image of the semiconductor light source 10) toward the second reflecting surface 31.

  The reflected light (light source image of the semiconductor light source 10) from the reflection surfaces 21R and 21L is not well-formed, and the contour or ridge line (longitudinal direction) of the light source image of the semiconductor light source 10 is inclined with respect to the horizontal line. It becomes a projected light source image (like the central reflecting surface 21c, the contour or ridge line (longitudinal direction) of the light source image is not always parallel to the horizontal line). For this reason, the reflected light (light source image of the semiconductor light source 10) from the reflection surfaces 21R and 21L is convenient for forming a headlamp light distribution pattern (light distribution pattern wide in the vertical direction).

  The reflected light (light source image of the semiconductor light source 10) from the two reflecting surfaces 21R and 21L is diffused only in the horizontal direction by the second reflecting surface 31, as shown in FIG. A light distribution pattern P2 (a light distribution pattern P2 having a cut-off line CL2 and wide in the vertical direction, which is a part of the light distribution pattern, see FIG. 13) is formed.

[Configuration of Second Reflector 30]
As shown in FIG. 1, the first reflector 20 having the first reflecting surface 21 (the center reflecting surface 21 c and the both-side reflecting surfaces 21 R, 21 L) is screwed into the screw hole 22 a formed in the fixing portion 22. The second reflector 30 is fixed to the second reflector 30 by screwing a screw N) inserted into the screw hole 33 formed in the second reflector 30.

  In this fixed state, between the semiconductor light source 10 and the first reflector 20 (first reflective surface 21), as shown in FIGS. 1 and 3, the semiconductor light source 10 faces the front of the light emitting surface 10a. Of the irradiated light, a space S1 through which light traveling mainly toward the right side of the lamp front view (right side in FIG. 3, ie, left side in the vehicle traveling direction) with respect to the arrangement direction of the plurality of LED chips 11 passes. Is formed.

[Configuration of Second Reflecting Surface 31]
As shown in FIGS. 1 and 9, the second reflector 30 includes a second reflecting surface 31 and a third reflecting surface 32.

  As shown in FIG. 1, the second reflecting surface 31 (corresponding to the second reflecting surface of the present invention) is the left side in the front view of the lamp with respect to the arrangement direction of the plurality of LED chips 11 (the left side in FIG. 3. It is arranged on the right side in the direction.

  The second reflecting surface 31 diffuses and reflects the reflected light from the first reflector 20 (central reflecting surface 21c, both-side reflecting surfaces 21R, 21L) in the horizontal direction, and is a light distribution pattern that is a part of the headlamp light distribution pattern. It is a reflective surface which forms P1 and P2 (refer FIG. 11, FIG. 13).

Specifically, the second reflecting surface 31 is provided with a plurality of cylindrical surface 31a which is arranged as shown in FIG. 9 or the like, as a whole, as shown in FIGS. 4 and 8, the focus F ₃ Central on the directrix 21c _d of the reflection surface 21c is a reflecting surface of the parabolic system set (position of the virtual image of the semiconductor light sources 10). For example, as the second reflecting surface 31, a parabolic column having a virtual image line (collection) of the semiconductor light source as a focal line is formed.

[Light distribution pattern P1]
The second reflecting surface 31, since the focus F ₃ is a reflecting surface of the parabolic system set on the directrix 21c _d (corresponding to the first reflecting surface of the present invention) the central reflecting surface 21c, the central reflecting surface The reflected light from 21c is diffusely reflected in the horizontal direction, and as shown in FIG. 11, the contour or ridgeline (longitudinal direction) of the light source image is parallel to the horizontal line on the vertical screen arranged at a predetermined front position. The light distribution pattern P1 (that is, the contour of the light source image 10A) having the cut-off line CL1 defined by the light source image 10A (see FIGS. 4 and 10) of the semiconductor light source 10 projected as described above and including the spot portion SP. Alternatively, since the ridge line (longitudinal direction) is parallel to the horizontal line H, a light distribution pattern P1 suitable for forming a cut-off line of the head lamp light distribution pattern (see FIGS. 10 and 11) may be formed. Possible That (corresponding to a first light distribution pattern of the present invention).

  Irradiation light from the semiconductor light source 10 (light source image of the semiconductor light source 10) is condensed (controls the degree of diffusion) vertically on the central reflecting surface 21c and left and right on the second reflecting surface 31. For this reason, the light distribution pattern P1 becomes a substantially uniform light distribution pattern without unevenness.

[Light distribution pattern P2]
The second reflecting surface 31 diffuses and reflects the reflected light from both side reflecting surfaces 21R and 21L (corresponding to the fifth reflecting surface of the present invention) in the horizontal direction, and is disposed at a predetermined position in front as shown in FIG. The light source images 10B and 10C (see FIGS. 8 and 12) of the semiconductor light source 10 are projected on the vertical screen so that the contour or ridge line (longitudinal direction of the light source image) of the light source image is inclined with respect to the horizontal line. Since the light distribution pattern P2 having the prescribed cut-off line CL2 (that is, the contours or ridge lines (longitudinal direction) of the light source images 10B and 10C are inclined with respect to the horizontal line H, the light distribution pattern P2 is vertically A wide light distribution pattern P2 (see FIGS. 12 and 13) can be formed (corresponding to the fourth light distribution pattern of the present invention).

[Single reflection optical system]
The third reflecting surface 32 as a one-time reflecting optical system is mainly arranged in the direction in which the plurality of LED chips 11 are arranged in the irradiation light emitted from the semiconductor light source 10 toward the front surface of the light emitting surface 10a (paper surface in FIG. 3). The light traveling toward the right side (right side in FIG. 3, that is, the left side in the vehicle traveling direction) of the lamp is reflected once as shown in FIG. It is an optical system which forms the light distribution pattern which is a part of.

  With respect to the arrangement direction of the plurality of LED chips 11 (direction perpendicular to the paper surface in FIG. 3), the light traveling toward the right side (right side in FIG. 3, that is, left side in the vehicle traveling direction) of the lamp is shown in FIG. As shown, the luminous flux in the conical range indicated by β (0 to 15 °) in FIG. 3 with respect to the optical axis of 0 ° of the semiconductor light source 10 × four LED chips 11 (the amount of light emitted from the four LED chips 11 is 2). This is a relatively bundled luminous flux. Light directed toward the right side of the lamp front view (the right side in FIG. 3, that is, the left side in the vehicle traveling direction) with respect to the arrangement direction of the plurality of LED chips 11 is the semiconductor light source 10 and the first reflector 20 (the first reflecting surface). 21) and the space S1 (see FIG. 1, FIG. 3, etc.) formed between the two.

  Hereinafter, details of the third reflecting surface 32 will be described.

[Configuration of Third Reflecting Surface 32]
The third reflecting surface 32 includes a right reflecting surface 32R and a left reflecting surface 32L arranged as shown in FIGS.

[Configuration of the right reflecting surface 32R]
The right reflecting surface 32R (corresponding to the third reflecting surface of the present invention) is, as shown in FIG. 1 and FIG. 9, the right side of the lamp front view with respect to the arrangement direction of the plurality of LED chips 11 (the right side in FIG. 3). It is arranged on the left side in the vehicle traveling direction) and on the front side of the lamp front view.

  The right reflecting surface 32 </ b> R is the right side of the lamp front view (right side in FIG. 3), mainly with respect to the arrangement direction of the plurality of LED chips 11 in the light emitted from the semiconductor light source 10 toward the front of the light emitting surface 10 a. This is a reflecting surface that reflects light toward the front side of the lamp front view and forms a light distribution pattern P3 (see FIG. 16) that is a part of the headlamp light distribution pattern.

Specifically, the right reflection surface 32R, as shown in FIG. 14, is a reflecting surface of the focal point F ₄ parabolic system set in the vicinity of the semiconductor light sources 10 (form nearly rotational paraboloid).

[Light distribution pattern P3]
Since the right reflecting surface 32R (corresponding to the third reflecting surface of the present invention) is a reflecting surface of the parabolic type the focus F ₄ is set in the vicinity of the semiconductor light source 10, the light emitting surface 10a forward from the semiconductor light sources 10 Of the light emitted toward the lamp, the right side of the lamp front view (right side in FIG. 3, that is, the left side in the vehicle traveling direction) and the front side of the lamp front view with respect to the arrangement direction of the plurality of LED chips 11 As shown in FIG. 16, the semiconductor projected on the vertical screen arranged at a predetermined position in front so that the contour or ridgeline (longitudinal direction) of the light source image is parallel to the horizontal line. A light distribution pattern P3 having a cut-off line CL3 defined by a light source image 10D (see FIGS. 14 and 15) of the light source 10 and including an elbow portion EB protruding above the horizontal line H (that is, the light source image 10D). Circle of Since the outline or ridge line (longitudinal direction) is parallel to the horizontal line H, a light distribution pattern P3 suitable for forming a cut-off line of the light distribution pattern for headlamps is formed (see FIGS. 15 and 16). (This corresponds to the second light distribution pattern of the present invention).

  The irradiation light from the semiconductor light source 10 reflected by the right reflecting surface 32R (light directed toward the right side in FIG. 3 (that is, the left side toward the vehicle traveling direction) with respect to the arrangement direction of the plurality of LED chips 11) is as described above. It is a relatively gathered light. For this reason, the light distribution pattern P3 formed by the right reflecting surface 32R is a relatively sharp light distribution pattern. For this reason, it becomes possible to improve distance visibility.

  Since the right reflecting surface 32R is positioned farther from the semiconductor light source 10 than the left reflecting surface 32L, the projected light source image 10D of the semiconductor light source 10 is a relatively small light source image.

[Configuration of Left Reflective Surface 32L]
As shown in FIGS. 1 and 9, the left reflecting surface 32L (corresponding to the fourth reflecting surface of the present invention) is the right side in the lamp front view with respect to the arrangement direction of the plurality of LED chips 11 (the right side in FIG. 3). It is arranged on the left side in the vehicle traveling direction) and on the back side when viewed from the front of the lamp.

  The left reflecting surface 32L is mainly the right side of the lamp when viewed from the front of the lamp in the direction in which the plurality of LED chips 11 are arranged in the light emitted from the semiconductor light source 10 toward the front of the light emitting surface 10a (the right side in FIG. 3). This is a reflecting surface that reflects light toward the rear side of the lamp front view and forms a light distribution pattern P4 (see FIG. 18) that is a part of the headlamp light distribution pattern.

Specifically, the left reflecting surface 32L, as shown in FIG. 14, is a reflecting surface of the focal point F ₅ parabolic system set in the vicinity of the semiconductor light source 10 (substantially a paraboloid of revolution).

[Light distribution pattern P4]
(Corresponding to the fourth reflecting surface of the present invention) left reflecting surface 32L, since the focus F ₅ is a reflecting surface of the parabolic system set in the vicinity of the semiconductor light source 10, the light emitting surface 10a forward from the semiconductor light sources 10 Of the light emitted toward the lamp, the right side of the lamp front view with respect to the arrangement direction of the plurality of LED chips 11 (the right side in FIG. 3, that is, the left side in the vehicle traveling direction) and the back side of the lamp front view As shown in FIG. 18, the semiconductor projected on the vertical screen arranged at a predetermined position in front so that the contour or ridgeline (longitudinal direction) of the light source image is parallel to the horizontal line. The light distribution pattern P4 having the cutoff line CL4 defined by the light source image 10E (see FIGS. 14 and 17) of the light source 10 (that is, the contour or ridge line (longitudinal direction) of the light source image 10E is parallel to the horizontal line H. Because Thus, it is possible to form a light distribution pattern P4 suitable for forming a cut-off line of the headlamp light distribution pattern (refer to FIGS. 17 and 18) (corresponding to the second light distribution pattern of the present invention).

  The irradiation light from the semiconductor light source 10 reflected by the left reflecting surface 32L (light directed toward the right side in FIG. 3 (that is, the left side in the vehicle traveling direction) with respect to the arrangement direction of the plurality of LED chips 11) is as described above. It is a relatively gathered light. For this reason, the light distribution pattern P4 formed by the left reflecting surface 32L is a relatively sharp light distribution pattern. For this reason, it becomes possible to improve distance visibility.

  Since the left reflecting surface 32L is located closer to the semiconductor light source 10 than the right reflecting surface 32R, the projected light source image 10E of the semiconductor light source 10 is a relatively large light source image. For this reason, the left reflecting surface 32L is a reflecting surface for small diffusion of the light source image of the semiconductor light source 10. In addition, according to the left reflecting surface 32L, an obliquely arranged light source image is also observed, but the size of the light source image is small, so that the diffusion is small.

  As described above, the first reflecting surface 21 and the second reflecting surface 31 as the two-reflection optical system are a plurality of LED chips 11 in the light emitted from the semiconductor light source 10 (light source image of the semiconductor light source 10). By partially reflecting the light (the light source image of the semiconductor light source 10) toward the left side in FIG. A certain light distribution pattern P1, P2 (a light distribution pattern P1 having a cut-off line CL1 and including a spot portion SP, a light distribution pattern P2 wide in the vertical direction suitable for a headlamp light distribution pattern) is formed.

  In addition, the third reflecting surface 32 as a one-time reflecting optical system is light (semiconductor light source 10 of the semiconductor light source 10) that travels to the right side in FIG. By reflecting the light source image once, light distribution patterns P3 and P4 (which have a cut-off line CL3 and projecting above the horizontal line H and which are part of the light distribution pattern for headlamps) The light distribution pattern P4 including the light distribution pattern P3 and the cut-off line CL4 is formed.

  The light source images 10A to 10E described above are actually superimposed light source images as shown in FIG. 19, and the light distribution patterns P1 to P4 are actually as shown in FIG. Thus, a superposed light distribution pattern (headlamp light distribution pattern) is obtained.

  As described above, according to the vehicle reflective lamp unit 100 of the present embodiment, the light emitted from the semiconductor light source 10 toward the front of the light emitting surface is reflected not by one reflector but by the twice-reflection optical system and once. Each of the optical systems captures and reflects and forms a predetermined light distribution pattern (light distribution patterns P1 to P4 suitable for a headlamp).

  That is, according to the vehicle reflection type lamp unit 100 of the present embodiment, the heights of the first reflection surface 21 and the second reflection surface 31 (corresponding to the conventional reflector 20 ′) as the double reflection optical system are lowered. As a result, even if the light from the semiconductor light source reflected and reflected by the twice-reflection optical system is reduced, the light from the semiconductor light source that is not reflected by the twice-reflection optical system is used as a one-time reflection optical system. The third reflecting surface 32 captures and reflects.

  In the present embodiment, the light guide member 40 is provided in order to further improve the light use efficiency of the semiconductor light source 10.

  As shown in FIGS. 1 and 21, the light guide member 40 is a thin light guide lens (a light guide plate is illustrated in FIGS. 1 and 21) formed using a transparent or translucent synthetic resin material or the like. Thus, a first fixing part 41 fixed to one upper end of the second reflector 30 with screws, a second fixing part 42 fixed to the other upper end of the second reflector 30 with screws, a first fixing part 41 and a second fixing part 41 A horizontally long opening forming portion 43 extending in the left-right direction when viewed from the front of the lamp between the fixed portions 42 is provided. As shown in FIG. 1, the light guide member 40 (mainly the opening forming portion 43) is fixed by screwing the first fixing portion 41 and the second fixing portion 42 to the upper end of the second reflector 30. A part of the horizontally elongated opening K (part of the lamp upper surface) extending in the left-right direction in front view of the lamp through which the twice reflected light by the reflecting surface 21 and the second reflecting surface 31 and the once reflected light by the third reflecting surface 32 pass. Constitute.

  As described above, the light guide member 40 is screwed and fixed to the second reflector 30 so that the light guide member 40 is disposed close to the side of the semiconductor light source 10 (a range indicated by 50 to 90 ° in FIG. 3). A surface 44 is provided. Even when the incident surface 44 is arranged in the state of being close to the semiconductor light source 10 as described above, the semiconductor light source 10 emits visible light having an extremely small infrared component, and therefore the incident surface 44 generates heat due to light emission of the semiconductor light source 10. Is almost unaffected.

  Of the light emitted by the semiconductor light source 10, the light directed to the side of the semiconductor light source 10 (light flux in the range of θ toward the right side in the range indicated by 50 to 90 ° in FIG. 3 × four LED chips 11. Four LED chips 11 is incident on the incident surface 44, repeatedly undergoes internal reflection, goes to the bent portion 45, is folded back in the opposite direction at the bent portion 45, and then extends horizontally. It is guided to the horizontally long opening forming portion 43. By this light guide lens action, the entire light guide member 40 including the opening forming portion 43 emits light (lightly shines).

  The light guide member 40 further improves the light utilization efficiency of the semiconductor light source 10. In addition, the light guide member 40 (especially, the horizontally long opening forming portion 43 extending in the left-right direction when viewed from the front of the lamp) has a thin feeling and a long feeling of the vehicle reflective lamp unit 100 (that is, a unique atmosphere of a lamp using a semiconductor light source). ) Can be further emphasized. This effect is particularly effective during twilight. Moreover, since the light guide member 40 is located at a position (front end of the vehicle) where the sunlight is easily hit (projected), there is an effect that the light guide member 40 is easily shined by receiving sunlight even during the daytime. In addition, the light guide member 40 may form a continuous cut on the back surface 43a or the front surface 43b as a matte finish, for example, as shown in FIG. .

  In the present embodiment, a heat sink 50 is provided as shown in FIG. 2 in order to dissipate heat generated by the light emission of the semiconductor light source 10. FIG. 22 is a side view of the heat sink 50.

  As shown in FIGS. 2 and 22, the heat sink 50 is a thin heat radiating member formed using a metal material such as aluminum, and is fixed to the central upper surface 34 (see FIG. 1) of the second reflector 30 with screws. The fixed portion 51 and the heat dissipating fins 52 are provided. The heat sink 50 (radiation fin 52) constitutes a part of the upper surface of the lamp as shown in FIG. 2 by fixing the fixing portion 51 to the center upper surface 34 of the second reflector 30 with screws. As shown in FIGS. 1 and 22, the radiation fins 52 are disposed in a gap S2 behind the second reflector 30 (a gap S2 existing in the left-right direction of the semiconductor light source 10).

  Thus, since the heat sink 50 is disposed on at least one of the upper, lower, left and right sides of the lamp except for the back of the lamp, the vehicle reflective is compared with the conventional reflective lamp unit for vehicles provided with the heat sink on the rear of the lamp. It becomes possible to shorten the length of the type lamp unit 100 in the vehicle front-rear direction. Further, since the heat sink 50 is disposed on at least one side of the lamp upper, lower, left and right except for the back of the lamp, the heat sink 50 (especially the heat radiating fins 52) can be kept away from the engine which is the main heat source. Thereby, the heat dissipation performance of the heat sink can be improved, and the junction temperature can be kept below an appropriate value. That is, even in a space that is exposed to high temperatures under the influence of the engine and its surrounding parts (a space in which the length in the vehicle front-rear direction is relatively short), the vehicle reflective lamp unit 100 is It becomes possible to arrange.

  As described above, according to the vehicle reflective lamp unit 100 of the present embodiment, the central reflecting surface 21c (corresponding to the first reflecting surface of the present invention), the second reflecting surface 31 (the second reflecting surface of the present invention). ), Right reflecting surface 32R (corresponding to the third reflecting surface of the present invention), left reflecting surface 32L (corresponding to the fourth reflecting surface of the present invention), and both reflecting surfaces 21R and 21L (fifth reflecting surface of the present invention). Equivalent).

The second reflecting surface 31, since the focus F ₃ is a reflecting surface of the parabolic system set on the directrix 21c _d (first corresponding to the reflecting surface of the present invention) the central reflecting surface 21c, the central The reflected light from the reflecting surface 21c is reflected, and as shown in FIG. 11, the contour or ridge line (longitudinal direction) of the light source image is parallel to the horizontal line on the vertical screen arranged at a predetermined position in front. A light distribution pattern P1 having a cut-off line CL1 defined by the projected light source image 10A (see FIGS. 4 and 10) of the semiconductor light source and including the spot portion SP (that is, the contour or ridge line of the light source image 10A has Since it is parallel to the horizontal line H, it is possible to form a light distribution pattern P1 suitable for forming a cut-off line of the light distribution pattern for headlamps (see FIGS. 10 and 11). 1st light distribution It corresponds to the turn).

Further, (corresponding to the third reflecting surface of the present invention) Right reflecting surface 32R is, the focal F ₄ is a reflecting surface of the parabolic system set in the vicinity of the semiconductor light source 10, the light emitting surface of the semiconductor light source 10 Of the light emitted toward the front side 10a, the lamp front view right side (right side in FIG. 3, that is, the left side in the vehicle traveling direction) and the lamp front view mainly with respect to the arrangement direction of the plurality of LED chips 11. As shown in FIG. 16, the light traveling toward the near side is reflected and projected on the vertical screen arranged at a predetermined position in front so that the contour or ridge line (longitudinal direction) of the light source image is parallel to the horizontal line. Further, a light distribution pattern P3 (that is, a light source) that has a cut-off line CL3 defined by a light source image 10D (see FIGS. 14 and 15) of the semiconductor light source and includes an elbow portion EB protruding above the horizontal line H. Statue 10 Since the contour or ridge line (longitudinal direction) of D is parallel to the horizontal line H, a light distribution pattern P3 suitable for forming a cut-off line of the headlamp light distribution pattern is formed (FIGS. 15 and 16). (Corresponding to the second light distribution pattern of the present invention).

Further, (corresponding to the fourth reflecting surface of the present invention) left reflecting surface 32L, since the focal point F ₅ is a reflecting surface of the parabolic system set in the vicinity of the semiconductor light source 10, the light emitting surface of the semiconductor light source 10 Of the light emitted toward the front of 10a, mainly toward the semiconductor light source 10, the right side of the lamp front view (right side in FIG. 3, that is, the left side in the vehicle traveling direction) side and the rear side of the lamp front view. As shown in FIG. 18, the light source image 10E of the semiconductor light source 10 is projected so that the contour or ridge line (longitudinal direction) of the light source image is parallel to the horizontal line, as shown in FIG. 18 (see FIGS. 14 and 17). The light distribution pattern P4 having the cut-off line CL4 defined by (that is, the contour or ridge line (longitudinal direction) of the light source image 10E is parallel to the horizontal line, thereby forming the cut-off line of the headlamp light distribution pattern. Can be formed (corresponding to the third light distribution pattern of the present invention).

  The second reflecting surface 31 diffuses and reflects the reflected light from both side reflecting surfaces 21R and 21L (corresponding to the fifth reflecting surface of the present invention) in the horizontal direction, and is disposed at a predetermined position in front as shown in FIG. The light source images 10B and 10C (see FIGS. 8 and 12) of the semiconductor light source 10 are projected on the vertical screen so that the contour or ridge line (longitudinal direction of the light source image) of the light source image is inclined with respect to the horizontal line. Since the light distribution pattern P2 having the defined cut-off line CL2 (that is, the contours or ridge lines (longitudinal direction) of the light source images 10B and 10C are inclined with respect to the horizontal line H, the light distribution pattern P2 has a vertical direction suitable for the headlamp light distribution pattern. A wide light distribution pattern P2 (see FIGS. 12 and 13) can be formed (corresponding to the fourth light distribution pattern of the present invention).

  Therefore, according to the vehicle reflective lamp unit 100 of the present embodiment, the central reflecting surface 21c (corresponding to the first reflecting surface of the present invention) can be used alone without combining a plurality of lamp units as in the prior art. ) And the second reflection surface 31 (corresponding to the second reflection surface of the present invention) and the light distribution pattern P1 (corresponding to the first light distribution pattern of the present invention) including the spot portion SP formed by twice reflection, right reflection Surface 32R (corresponding to the third reflection surface of the present invention) Light distribution pattern P3 (corresponding to the second light distribution pattern of the present invention) including the elbow portion EB formed by a single reflection, left reflection surface 32L (the present invention) Light distribution pattern P4 (corresponding to the third light distribution pattern of the present invention) formed by a single reflection, and both side reflection surfaces 21R and 21L (corresponding to the fourth reflection surface of the present invention). Equivalent) and the second reflecting surface 31 (of the present invention) A clear cut-off line that is a combined light distribution pattern of the light distribution pattern P2 (corresponding to the fourth light distribution pattern of the present invention) formed by two reflections (corresponding to two reflective surfaces) and vertically A wide headlamp light distribution pattern (see FIGS. 19 and 20) can be formed.

  Note that in the vehicle reflective lamp unit 100 of the present embodiment, the light that is irradiated from the semiconductor light source 10 toward the front of the light emitting surface 10a is not a single reflector but a first reflection optical system. The surface 21 and the second reflecting surface 31 and the third reflecting surface 32 as a one-time reflecting optical system are captured and reflected to form a predetermined light distribution pattern (for example, a headlamp light distribution pattern). Yes.

  That is, in the vehicle reflective lamp unit 100 of the present embodiment, the heights of the first reflecting surface 21 and the second reflecting surface 31 (corresponding to the conventional reflector 20 ′) as the twice reflecting optical system are lowered. As a result, even if the light from the semiconductor light source reflected and reflected by the twice-reflection optical system is reduced, the light from the semiconductor light source that is not reflected by the twice-reflection optical system is used as a one-time reflection optical system. The third reflecting surface 32 captures and reflects.

  Next, a modified example will be described.

  In the above-described embodiment, an example in which the vehicle reflective lamp unit 100 is applied to a headlamp of an automobile or the like to form a headlamp light distribution pattern has been described, but the present invention is not limited to this. For example, the vehicle reflective lamp unit 100 can be applied to an auxiliary headlamp such as a fog lamp to form the auxiliary headlamp light distribution pattern.

  Moreover, in the said embodiment, as shown in FIG.1, FIG.5 etc., the 1st reflective surface 21 is the center reflective surface 21c arrange | positioned in the center, and the both-side reflective surface each arrange | positioned at the both sides of the central reflective surface 21c. Although described as being composed of 21R and 21L, the present invention is not limited to this.

  For example, the first reflective surface 21 can be configured only by the central reflective surface 21c disposed at the center.

  According to this modification, even if it is independent, it is caused by the double reflection of the central reflecting surface 21c (corresponding to the first reflecting surface of the present invention) and the second reflecting surface 31 (corresponding to the second reflecting surface of the present invention). An elbow portion formed by a single reflection of the light distribution pattern P1 (corresponding to the first light distribution pattern of the present invention) including the spot portion SP to be formed and the right reflecting surface 32R (corresponding to the third reflecting surface of the present invention). A light distribution pattern P3 including EB (corresponding to the second light distribution pattern of the present invention) and a light distribution pattern P4 formed by one reflection of the left reflecting surface 32L (corresponding to the fourth reflecting surface of the present invention) It is possible to form a headlamp light distribution pattern that has a clear cut-off line that is a composite light distribution pattern (corresponding to the third light distribution pattern of the present invention) and that is wide in the vertical direction.

  Moreover, although the semiconductor light source 10 demonstrated in the said embodiment that it was the several LED chip 11 as a semiconductor light-emitting device, this invention is not limited to this. For example, when the vehicle reflective lamp unit 100 is used as a headlight, one LED chip (a linear contour or ridge line in the projected image (the above-described implementation) can be used as long as a sufficient amount of light can be secured to function as a headlamp. Only one LED light source) in which a contour or a ridge line corresponding to the longitudinal direction of the form appears may be used.

  Moreover, although the said embodiment demonstrated the example using one reflective lamp unit 100 for vehicles, this invention is not limited to this.

  For example, as shown in FIGS. 23 and 24, a plurality of vehicle reflective lamp units 100 may be used in combination according to the required luminous intensity / light flux. FIG. 23 is an example (side view) in which a plurality of vehicle reflective lamp units 100 are combined in two stages, and FIG. 24 is a top view of the plurality of vehicle reflective lamp units 100 shown in FIG. .

  When a plurality of vehicle reflection-type lamp units 100 are used in combination, a plurality of second reflectors 30 (a plurality of second reflection surfaces 31 and a plurality of third reflection surfaces 32) are formed by batch molding (integral molding). If the necessary number of first reflectors (first reflecting surfaces 21) are installed (and the light guide member 40 is further installed if necessary), the second reflecting surface 31 and the third reflecting surface 32 are individually provided. It becomes possible to omit the optical axis alignment. In this batch molding method, it is not necessary to prepare units of different light distributions such as a diffusion unit and a spot light unit in the case of the combination of units 100, and batch molding may be performed according to the conventional method. .

  Moreover, although the said embodiment demonstrated that the opening K formed by the opening formation part 43 of the light guide member 40 was open | released, this invention is not limited to this. For example, a lens (not shown) that covers the opening K is provided, and the twice reflected light by the first reflecting surface 21 and the second reflecting surface 31 and the once reflected light by the third reflecting surface 32 are irradiated through the lens. You may make it do.

  Moreover, in the said embodiment, although the semiconductor light source 10 (LED chip | tip 11) demonstrated as having been arrange | positioned in the state which faced the lower right diagonally seeing the lamp front view, this invention is not limited to this. For example, the semiconductor light source 10 (LED chip 11) may be arranged in a state directed obliquely to the lower left when the lamp is viewed from the front. Or the semiconductor light source 10 (LED chip 11) may be arrange | positioned in the state which faced the lamp front view diagonally upper right or upper left.

  Moreover, although the said 1st reflector 20 (1st reflective surface 21) and the light guide member 40 were each demonstrated as a separate component in the said embodiment, this invention is not limited to this. For example, the first reflector 20 and the light guide member 40 may be collectively formed of a transparent resin. This facilitates manufacturing. Also, the number of parts assembling steps can be reduced. In addition, this batch molding improves the mounting accuracy of the first reflector 20. This is because the first reflector 20 is held at the three positions of the lower end, the left end, and the right end.

  Moreover, in the said embodiment, the light (for example, 0 in FIG. 3) of the brightness | luminance suitable for formation of the predetermined light distribution pattern (for example, light distribution pattern for headlamps) among the lights irradiated to a lamp front view left-right direction. The luminous flux in the range of α toward the left in the cone range shown at ˜50 ° × the plurality of LED chips 11. About 70 to 80% The luminous flux in the range of β going to the right in the cone range shown in FIG. A plurality of LED chips 11 (about 20% of the amount of light emitted from the LED chips 11) has been described as being effectively used, but the present invention is not limited to this. For example, on the basis of this ratio, it is possible to adjust the spot flood ratio of each unit used in combination. In particular, in the case of a lamp with a large slant slope (up to 45 ° or -60 °) in recent years, the diffusion ratio increases in a unit with a large angle, and the spot ratio in a unit closer to the center increases. It is obvious that it will increase.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

It is a perspective view of the reflection type lamp unit for vehicles (there is no heat sink) using the semiconductor light source of this embodiment. It is a perspective view of the reflection type lamp unit for vehicles (with a heat sink) using the semiconductor light source of this embodiment. It is the figure which looked at the 2nd reflector 30 from the lamp front. It is a figure for demonstrating the light source image 10A of the semiconductor light source 10 projected by the 1st reflective surface 21 (center reflective surface 21c) and the 2nd reflective surface 31 as a twice reflective optical system. FIG. 3 is a perspective view of the first reflector 20. 3 is a cross-sectional view of a central reflecting surface 21c cut along a vertical plane including a semiconductor light source 10. FIG. It is a top view of the central reflective surface 21c seen from the direction shown by the arrow A in FIG. It is a figure for demonstrating the light source images 10B and 10C of the semiconductor light source 10 projected by the 1st reflective surface 21 (both reflective surfaces 21R and 21L) and the 2nd reflective surface 31 as a twice reflective optical system. 4 is a perspective view of a second reflector 30. FIG. It is a figure for demonstrating the light source image 10A of the semiconductor light source 10 projected by the 1st reflective surface 21 (center reflective surface 21c) and the 2nd reflective surface 31 as a twice reflective optical system. It is a figure for demonstrating the light distribution pattern P1 formed by the light source image 10A shown in FIG. It is a figure for demonstrating the light source images 10B and 10C of the semiconductor light source 10 projected by the 1st reflective surface 21 (both reflective surfaces 21R and 21L) and the 2nd reflective surface 31 as a twice reflective optical system. It is a figure for demonstrating the light distribution pattern P2 formed of the light source images 10B and 10C shown in FIG. It is a figure for demonstrating the light source images 10D and 10E of the semiconductor light source 10 projected by the 3rd reflective surface 32 as a once reflective optical system. It is a figure for demonstrating light source image 10D of the semiconductor light source 10 projected by the 3rd reflective surface 32 (right reflective surface 32R) as a once reflective optical system. It is a figure for demonstrating the light distribution pattern P3 formed of the light source image 10D shown in FIG. It is a figure for demonstrating the light source image 10E of the semiconductor light source 10 projected by the 3rd reflective surface 32 (left reflective surface 32L) as a once reflective optical system. It is a figure for demonstrating the light distribution pattern P4 formed with the light source image 10E shown in FIG. It is a figure for demonstrating the state which superimposed the light source images 10A-10E projected by each of a twice reflection optical system and a once reflection optical system. It is a figure for demonstrating the light distribution patterns P1-P4 (light distribution pattern for headlamps) formed with the light source images 10A-10E shown in FIG. 3 is a perspective view of a light guide member 40. FIG. 3 is a side view of a heat sink 50. FIG. It is the example (side view) which combined the reflective lamp unit 100 for vehicles in two steps. FIG. 24 is a top view of the plurality of vehicle reflective lamp units 100 shown in FIG. 23. It is a figure for demonstrating the reflective lamp for vehicles using the conventional semiconductor light source. It is a figure for demonstrating the light distribution pattern of the reflective lamp for vehicles using the conventional semiconductor light source shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Reflective lamp unit for vehicles, 10 ... Semiconductor light source, 11 ... LED chip, 20 ... 1st reflector, 21 ... 1st reflective surface, 21a ... Reflective surface, 21b ... Reflective surface, 22 ... Screw hole, 30 ... 1st 2 reflectors 31... Second reflecting surface 31 a. Cylindrical surface 32. Third reflecting surface 32 a. Reflecting surface 32 b .. reflecting surface 33 .. screw hole 40 .. light guide member 41. Fixed part, 43 ... opening forming part, 44 ... incident surface, 45 ... bent part, 50 ... heat sink, 51 ... fixed part, 52 ... radiation fin

Claims (10)

In a reflective headlamp unit for a vehicle that is mounted on a vehicle and forms a light distribution pattern for a headlamp,
A semiconductor light source arranged with the light emitting surface facing the lamp front or below,
Including a first reflecting surface, a second reflecting surface, a third reflecting surface and a fourth reflecting surface;
The first reflecting surface is disposed in front of the light emitting surface of the semiconductor light source, and is mainly either left or right in the front view of the lamp with respect to the semiconductor light source of light emitted from the semiconductor light source toward the front of the light emitting surface. A reflective surface that diffuses and reflects light toward one side in the horizontal direction toward the second reflective surface;
The second reflecting surface is disposed on the one side with respect to the semiconductor light source, diffuses and reflects the reflected light from the first reflecting surface in the horizontal direction, and is a part of the headlamp light distribution pattern. A reflecting surface that forms a first light distribution pattern including a spot portion;
The third reflecting surface is disposed on the other side opposite to the one side with respect to the semiconductor light source and on the front side of the front of the lamp, and among the light emitted from the semiconductor light source toward the front of the light emitting surface Reflecting light mainly toward the other side of the semiconductor light source opposite to the one side and toward the front side of the lamp, and above a horizontal line that is part of the headlamp light distribution pattern. Is a reflecting surface that forms a second light distribution pattern including an elbow portion protruding into
The fourth reflecting surface is disposed on the other side opposite to the one side with respect to the semiconductor light source and on the back side of the lamp in front view, and among the light emitted from the semiconductor light source toward the front of the light emitting surface The third light distribution that reflects light mainly toward the semiconductor light source on the other side opposite to the one side and toward the rear side when viewed from the front of the lamp and is part of the headlamp light distribution pattern A reflective headlamp unit for a vehicle using a semiconductor light source, which is a reflective surface for forming a pattern. The first reflecting surface is a parabolic columnar reflecting surface whose focal line is set in the vicinity of the semiconductor light source,
The second reflecting surface is a parabolic reflecting surface whose focal point is set on a quasi-line of the first reflecting surface;
The third reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the semiconductor light source,
2. The vehicle reflective headlamp unit using a semiconductor light source according to claim 1, wherein the fourth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the semiconductor light source. 3. . The first reflecting surface is a parabolic columnar reflecting surface whose focal line is set in the vicinity of the semiconductor light source,
The second reflecting surface reflects the reflected light from the first reflecting surface and is projected as the first light distribution pattern so that the contour of the light source image is parallel to a horizontal line. A parabolic reflecting surface having a cutoff line defined by an image and forming a light distribution pattern including the spot portion, the focal point being set on a quasi-line of the first reflecting surface;
The third reflecting surface is mainly the other side of the light emitted from the semiconductor light source toward the front of the light emitting surface, opposite to the one side with respect to the semiconductor light source, and the front side of the lamp front view. And has a cutoff line defined by the light source image of the semiconductor light source projected so that the outline of the light source image is parallel to the horizontal line as the second light distribution pattern, and Forming a light distribution pattern including an elbow protruding above the horizontal line, the focal point is a reflecting surface of a rotating paraboloidal system set near the semiconductor light source;
The fourth reflecting surface is mainly the other side opposite to the one side of the light emitted from the semiconductor light source toward the front of the light emitting surface, and the back side in the front view of the lamp. A light distribution pattern having a cut-off line defined by the light source image of the semiconductor light source projected so that the contour of the light source image is parallel to the horizontal line as the third light distribution pattern. The reflective headlamp unit for a vehicle using a semiconductor light source according to claim 1, wherein the focal point is a reflecting surface of a rotary paraboloid system whose focal point is set in the vicinity of the semiconductor light source. A fifth reflecting surface disposed on both sides of the first reflecting surface;
The fifth reflecting surface diffuses light mainly toward the one side with respect to the semiconductor light source from the semiconductor light source toward the front of the light emitting surface toward the second reflecting surface. A reflective surface to reflect,
The second reflecting surface diffuses and reflects the reflected light from the fifth reflecting surface in a horizontal direction to form a fourth light distribution pattern that is a part of the headlamp light distribution pattern. Item 5. A vehicle reflective headlamp unit using the semiconductor light source according to any one of Items 1 to 3. The fifth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the semiconductor light source,
The second reflecting surface diffuses and reflects the reflected light from the fifth reflecting surface in the horizontal direction and is projected as the fourth light distribution pattern so that the contour of the light source image is inclined with respect to the horizontal line. 5. The vehicle reflective headlamp unit using a semiconductor light source according to claim 4, wherein a light distribution pattern having a cut-off line defined by a light source image of the light source is formed. In a reflective headlamp unit for a vehicle that is mounted on a vehicle and forms a light distribution pattern for a headlamp,
A plurality of semiconductor light emitting elements arranged with the light emitting surface facing the lamp front view or downward, and
Including a first reflecting surface, a second reflecting surface, a third reflecting surface and a fourth reflecting surface;
The first reflecting surface is disposed in front of a light emitting surface of the plurality of semiconductor light emitting elements, and mainly the plurality of semiconductor light emitting elements among light emitted from the plurality of semiconductor light emitting elements toward the front of the light emitting surface. A light-reflecting surface that diffuses and reflects light directed toward either the left or right side of the lamp front view toward the second reflecting surface in the horizontal direction with respect to the arrangement direction of
The second reflection surface is disposed on the one side with respect to the arrangement direction of the plurality of semiconductor light emitting elements, diffusely reflects the reflected light from the first reflection surface in the horizontal direction, and distributes the light for the headlamp. A reflecting surface that forms a first light distribution pattern including a spot portion that is part of the pattern;
The third reflecting surface is disposed on the other side opposite to the one side and on the front side of the lamp in front of the light emitting surface from the plurality of semiconductor light emitting elements. Of the light emitted toward the light, mainly reflects the light toward the other side opposite to the one side and the front side of the lamp front with respect to the arrangement direction of the plurality of semiconductor light emitting elements, A reflecting surface that forms a second light distribution pattern including an elbow protruding above a horizontal line that is a part of the light distribution pattern for headlamps;
The fourth reflecting surface is disposed on the other side opposite to the one side and the back side of the lamp in the arrangement direction of the plurality of semiconductor light emitting elements, and from the plurality of semiconductor light emitting elements to the front side of the light emitting surface Of the light emitted toward the light, mainly reflects the light toward the other side opposite to the one side and the lamp front view back side with respect to the arrangement direction of the plurality of semiconductor light emitting elements, A reflective headlamp unit for a vehicle using a semiconductor light source, characterized in that the reflective surface forms a third light distribution pattern which is a part of a light distribution pattern for headlamps. The first reflective surface is a parabolic columnar reflective surface having a focal line set in the vicinity of the plurality of semiconductor light emitting elements,
The second reflecting surface is a parabolic reflecting surface whose focal point is set on a quasi-line of the first reflecting surface;
The third reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the plurality of semiconductor light emitting elements,
7. The vehicle reflective type using a semiconductor light source according to claim 6, wherein the fourth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the plurality of semiconductor light emitting elements. Headlamp unit. The first reflective surface is a parabolic columnar reflective surface having a focal line set in the vicinity of the plurality of semiconductor light emitting elements,
The second reflection surface reflects the reflected light from the first reflection surface, and the plurality of semiconductor light emission projected as the first light distribution pattern so that a contour of a light source image is parallel to a horizontal line. A parabolic reflecting surface having a cut-off line defined by a light source image of the element and forming a light distribution pattern including the spot portion, the focal point being set on a quasi-line of the first reflecting surface; Yes,
The third reflecting surface is opposite to the one side mainly with respect to the arrangement direction of the plurality of semiconductor light emitting elements among the light emitted from the plurality of semiconductor light emitting elements toward the front of the light emitting surface. The light source images of the plurality of semiconductor light emitting elements that reflect light toward the other side and the front side of the lamp front view and are projected as the second light distribution pattern so that the outline of the light source image is parallel to the horizontal line. A paraboloidal system having a focal point set in the vicinity of the plurality of semiconductor light-emitting elements, forming a light distribution pattern including an elbow portion protruding above a horizontal line and having a cutoff line defined by Surface,
The fourth reflecting surface is opposite to the one side mainly with respect to the arrangement direction of the plurality of semiconductor light emitting elements among the light emitted from the plurality of semiconductor light emitting elements toward the front of the light emitting surface. The light source images of the plurality of semiconductor light emitting elements that reflect the light toward the other side and the back side of the lamp in the front view and are projected as the third light distribution pattern so that the contour of the light source image is parallel to the horizontal line. The semiconductor according to claim 6, wherein the semiconductor is formed by a paraboloidal reflecting surface formed in the vicinity of the plurality of semiconductor light emitting elements, forming a light distribution pattern having a cutoff line defined by A reflective headlamp unit for vehicles using a light source. A fifth reflecting surface disposed on both sides of the first reflecting surface;
The fifth reflecting surface mainly emits light directed toward the one side with respect to the arrangement direction of the plurality of semiconductor light emitting elements among the light emitted from the plurality of semiconductor light emitting elements toward the front of the light emitting surface. A reflecting surface that diffusely reflects toward the second reflecting surface;
The second reflecting surface diffuses and reflects the reflected light from the fifth reflecting surface in a horizontal direction to form a fourth light distribution pattern that is a part of the headlamp light distribution pattern. Item 9. A vehicle reflective headlamp unit using the semiconductor light source according to any one of Items 6 to 8. The fifth reflecting surface is a rotating paraboloid reflecting surface whose focal point is set in the vicinity of the plurality of semiconductor light emitting elements,
The second reflecting surface diffusely reflects the reflected light from the fifth reflecting surface in the horizontal direction and is projected as the fourth light distribution pattern so that the outline of the light source image is inclined with respect to the horizontal line. The reflective headlamp unit for a vehicle using a semiconductor light source according to claim 9, wherein a light distribution pattern having a cutoff line defined by a light source image of the semiconductor light emitting element is formed.

Images