JP2019079697A - Vehicular lighting fixture unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp unit for a vehicle capable of shortening a dimension in a vehicle front-rear direction. SOLUTION: In a vehicle lamp 10 including a first optical system 20 for forming a low beam light distribution pattern and a second optical system 30 for forming a high beam light distribution pattern, the first optical system is a front end. A first tubular reflective surface 21 composed of first reflective surfaces provided on the upper, lower, left and right sides, in which the opening A1 is larger than the rear end opening A2 and narrows in a pyramidal shape from the front end opening toward the rear end opening, and the rear. It has a first light source 22 provided so as to face the end opening. In the second optical system, the front end opening B1 is larger than the rear end opening B2, and becomes narrower in a cone shape from the front end opening to the rear end opening. Further, the first optical system and the second optical system are arranged in parallel, and the first light source and the second light source are arranged on the first plane PL1. The first projection lens 23 and the second projection lens 33 are arranged on the second plane PL2 in front of the first plane. [Selection diagram] Fig. 3

Description

  The present invention relates to a vehicle lamp unit.

  Conventionally, a vehicle lamp including a first optical system and a second optical system arranged in parallel (e.g., in parallel in the vertical direction) has been proposed (e.g., see Patent Document 1 (FIG. 3, etc.)).

JP, 2016-001616, A

  However, in the vehicle lamp described in Patent Document 1, one optical system is a direct projection type (also referred to as direct type) optical system, and the other optical system is a projector type optical system. There is a problem that the dimension in the longitudinal direction of the vehicle becomes long.

  The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a vehicle lamp unit capable of shortening the dimension in the vehicle longitudinal direction.

  In order to achieve the above object, one aspect of the present invention is a vehicle lamp including a first optical system for forming a low beam light distribution pattern and a second optical system for forming a high beam light distribution pattern. In the first optical system, the first cylinder is constituted by a first reflecting surface provided on the upper, lower, left, and right sides whose front end opening becomes larger in a cone shape as the front end opening becomes larger than the rear end opening toward the rear end opening. A mold reflection surface, a first light source provided opposite to the rear end opening, and a front end edge of the first reflection surface provided in the vicinity of the front end edge of the first reflection surface provided opposite to the front end opening And a first projection lens for emitting light directed from the first light source and reflected light from the first light source reflected by the first cylindrical reflecting surface, the focal point being located, The front edge of the reflective surface provided below the reflective surface is the row. The second optical system has a front end opening that is larger than the rear end opening and becomes narrower in a cone shape as it goes from the front end opening to the rear end opening; And a second light source provided opposite to the rear end opening, and a second light source provided opposite to the rear end opening, the second light source provided opposite to the front end opening; A second projection lens provided with a focal point in the vicinity, and emitting forward light from the second light source and light reflected from the second light source reflected by the second cylindrical reflection surface; The first optical system and the second optical system are arranged in parallel, and the first light source and the second light source are arranged on a first plane, and the first projection lens and the second projection lens are the same. It is characterized in that it is disposed on the second plane ahead of the first plane To.

  According to this aspect, it is possible to provide a vehicle lamp unit capable of shortening the dimension in the vehicle front-rear direction as compared with the above-described conventional technology.

  This is because both the first optical system and the second optical system are configured as direct projection type optical systems.

  Further, according to this aspect, the first light source and the second light source are disposed on the same first plane, and the first projection lens and the second projection lens are disposed on the same second plane. A vehicle lamp unit having a structure can be provided.

  This is because the first cylindrical reflecting surface is provided between the first projection lens and the first light source, and the vicinity of the front end edge of the reflecting surface provided below the focal point of the first projection lens having a relatively short focal length. And the focal point of the second projection lens having a relatively long focal length is located near the second light source.

  Further, in the above-mentioned invention, in a preferable aspect, the first light source and the second light source are mounted on the same substrate, and the first projection lens and the second projection lens are integrally molded. I assume.

  According to this aspect, there is provided an easily assembled vehicle lamp unit in which the first light source and the second light source are disposed on the same substrate, and the first projection lens and the second projection lens are integrally formed. be able to.

  Further, in the above-mentioned invention, a preferable embodiment is characterized in that the reflecting surface provided below the second reflecting surface includes an extended reflecting surface extended forward from the reflecting surface provided above.

  According to this aspect, the thickness in the vertical direction above the horizontal line of the light distribution pattern for high beam can be made thicker than the thickness in the vertical direction below the horizontal line.

  This is due to the fact that the reflective surface provided below includes an extended reflective surface extending forward of the reflective surface provided above.

  One aspect of the present invention is provided in a vehicle lamp forming a light distribution pattern for high beam, wherein the front end opening is larger than the rear end opening, and narrows in a cone shape as it goes from the front end opening to the rear end opening. A cylindrical reflecting surface constituted by the reflecting surface, a light source provided opposite to the rear end opening, and a front end opening provided opposite to the front end opening, and a focus is provided in the vicinity of the light source; And a projection lens configured to irradiate forwardly reflected light from the light source reflected by the cylindrical reflection surface and direct light, and a reflection surface provided below the reflection surface provided on the upper, lower, left, and right sides It is characterized in that it includes an extended reflective surface that extends forward from the reflective surface provided above.

  According to this aspect, the thickness in the vertical direction above the horizontal line of the light distribution pattern for high beam can be made thicker than the thickness in the vertical direction below the horizontal line.

  This is due to the fact that the reflective surface provided below includes an extended reflective surface extending forward of the reflective surface provided above.

FIG. 2 is a perspective view of a vehicle lamp unit 10; FIG. 2 is a front view of a lamp unit 10 for a vehicle. FIG. 2 is a vertical cross-sectional view of the vehicle lamp unit 10; It is a horizontal sectional view of the 1st optical system. It is a horizontal sectional view of the 2nd optical system. (A) A perspective view of the second cylindrical reflecting surface 31, (b) a K-K cross sectional view of the second cylindrical reflecting surface 31 shown in FIG. 6 (c), (c) a front view of the second cylindrical reflecting surface 31 It is JJ sectional drawing of the 2nd cylindrical reflection surface 31 shown to a figure, (d) FIG.6 (c). (A) An example of a low beam light distribution pattern P _Lo , (b) an example of a high beam light distribution pattern P _Hi , (c) an example of a light distribution pattern P _{Hi_1} formed by light controlled by the left lens unit 33L (D) is an example of a light distribution pattern P _{Hi — 2} formed by light controlled by the right lens unit 33R. It is a figure for demonstrating the relationship between the 2nd projection lens 33 and a light source image. It is a figure for demonstrating the relationship between the 2nd projection lens 33 and a light source image. It is a figure for demonstrating the relationship between the 2nd projection lens 33 and a light source image. It is a figure for demonstrating the problem at the time of arrange | positioning the 1st optical system 20 to lower side, and the 2nd optical system 30 to upper side.

  Hereinafter, a vehicle lamp unit 10 according to an embodiment of the present invention will be described with reference to the attached drawings. The same reference numerals are given to the corresponding components in the respective drawings, and the overlapping description will be omitted.

  FIG. 1 is a perspective view of a vehicle lamp unit 10.

  The vehicle lamp unit 10 shown in FIG. 1 is a vehicle headlamp (head lamp), and is mounted on the left and right sides of the front end of a vehicle (not shown). Although not shown, the vehicle lamp unit 10 is disposed in a lamp chamber formed by an outer lens and a housing, and is attached to the housing or the like.

  FIG. 2 is a front view of the vehicle lamp unit 10. 3 is a vertical sectional view of the vehicle lamp unit 10, FIG. 4 is a horizontal sectional view of the first optical system, and FIG. 5 is a horizontal sectional view of the second optical system.

  As shown in FIGS. 1 to 5, the vehicle lamp unit 10 of the present embodiment includes a first optical system 20 for forming a low beam light distribution pattern, and a second optical system 30 for forming a high beam light distribution pattern. And. The first optical system 20 and the second optical system 30 are, for example, arranged in parallel in the vertical direction. Specifically, the first optical system 20 is disposed on the upper side, and the second optical system 30 is disposed on the lower side. In contrast to this, the first optical system 20 may be disposed on the lower side, and the second optical system 30 may be disposed on the upper side. In addition, the first optical system 20 and the second optical system 30 may be arranged in parallel in the left-right direction, or may be arranged in parallel in the oblique direction.

  As shown in FIGS. 3 and 4, the first optical system 20 is a direct projection type (also referred to as a direct type) including a first cylindrical reflection surface 21, a first light source 22, and a first projection lens 23. Optical system. The first cylindrical reflection surface 21, the first light source 22, and the first projection lens 23 are disposed on a first optical axis AX1 extending in the vehicle longitudinal direction.

  The first cylindrical reflection surface 21 is a cylindrical reflection surface which is narrowed in a pyramidal shape (square pyramidal shape) as the front end opening A1 is larger than the rear end opening A2 toward the rear end opening A2 from the front end opening A1. It is comprised by reflective surface 21a, 21b, 21c, 21d provided in. Hereinafter, the reflective surfaces 21a, 21b, 21c, and 21d will be referred to as the reflective surface 21 unless otherwise specified. The reflective surface 21 is an example of the first reflective surface of the present invention.

  The front end edge 21b1 (edge portion) of the reflective surface 21b provided below is formed in a shape corresponding to the cutoff line of the low beam light distribution pattern. Although not shown, the front end edge 21b1 has a Z-shaped stepped portion.

  As shown in FIGS. 3 and 4, the first cylindrical reflection surface 21 has a rear end opening A2 so that light from the first light source 22 (light emitting surface) passes through the inside of the first cylindrical reflection surface 21. It is hold | maintained by the holding member 40 in the state which the 1st light source 22 (light emitting surface) opposed. The rear end opening A2 of the first cylindrical reflecting surface 21 surrounds the first light source 22 (light emitting surface) in a front view (not shown).

  The first cylindrical reflection surface 21 may be, for example, a screw (not shown) inserted in a screw hole (not shown) formed in screw holes N1 and N2 provided on the left and right sides and a substrate K. Is held by the holding member 40 by screwing.

  The first light source 22 is a semiconductor light emitting element such as an LED or an LD provided with a rectangular (for example, 1 mm square) light emitting surface. The first light source 22 is mounted on the substrate K with the light emitting surface facing forward (front). The number of first light sources 22 is not particularly limited, and may be one or more. In the case of a plurality of first light sources 22, the first light sources 22 are arranged in a line in the horizontal direction. The substrate K is held by the holding member 40 by screwing or the like.

  The first projection lens 23 performs the first projection so that the direct light from the first light source 22 (light emitting surface) passing through the first cylindrical reflecting surface 21 and the reflected light from the first cylindrical reflecting surface 21 are transmitted. It is hold | maintained by the holding member 40 in the state which the back surface 23b of the lens 23 and front end opening A1 of the 1st cylindrical reflection surface 21 opposed (refer FIG. 3, FIG. 4).

  As shown in FIGS. 1 and 2, the first projection lens 23 is integrally molded with the second projection lens 33 and the leg 50 by injection molding of a transparent resin such as acryl or polycarbonate. The screw (not shown) inserted into the screw holes N5 and N6 provided in the screw is held by the holding member 40 by screwing it to the holding member 40.

  As shown in FIG. 2, the first projection lens 23 is configured as a lens having a shape (an octagonal shape) in which an outer shape in a front view is cut at four corners of a rectangle.

As shown in FIG. 3, the focus _{F 23} of the first projection lens 23 is located at the front end edge 21b1 vicinity of the reflecting surface 21b provided on the lower.

In the first optical system 20 configured as described above, when the first light source 22 is turned on, the direct light from the first light source 22 and the reflected light from the first cylindrical reflection surface 21 pass through the first projection lens 23 to be forward Irradiated. At that time, the luminous intensity distribution formed at the front end opening A1 of the first cylindrical reflecting surface 21 by the direct light from the first light source 22 and the reflected light from the first cylindrical reflecting surface 21 is forwardly directed by the first projection lens 23. Is projected reversely. Thus, a low beam light distribution pattern _PLo is formed.

FIG. 7A is an example of the low beam light distribution pattern _PLo . In FIG. 7 (a), an example of directly facing the virtual vertical screen low-beam distribution pattern P _Lo formed on (located about 25m forward from the vehicle front) is shown in front of the vehicle. Light distribution pattern P _Lo low-beam includes a cut-off line CL defined by the front end edge 21b1 of the reflecting surface 21b provided on the lower the upper edge.

  As shown in FIGS. 3 and 5, the second optical system 30 is a direct projection type (also referred to as a direct type) including a second cylindrical reflection surface 31, a second light source 32, and a second projection lens 33. Optical system. The second cylindrical reflection surface 31, the second light source 32, and the second projection lens 33 are disposed on a second optical axis AX2 extending in the vehicle longitudinal direction and parallel to the first optical axis AX1.

  6 (a) is a perspective view of the second cylindrical reflection surface 31, FIG. 6 (b) is a K-K cross sectional view of the second cylindrical reflection surface 31 shown in FIG. 6 (c), and FIG. FIG. 6 (d) is a J-J cross-sectional view of the second cylindrical reflecting surface 31 shown in FIG. 6 (c).

  As shown in FIG. 6, the second cylindrical reflection surface 31 has a cylinder whose front end opening B1 is larger than the rear end opening B2 and narrows in a cone shape (quadrangular pyramid shape) as it goes from the front end opening B1 to the rear end opening B2. The mold reflecting surface is constituted by reflecting surfaces 31a, 31b, 31c and 31d provided on the top, bottom, left and right. Hereinafter, the reflective surfaces 31a, 31b, 31c, and 31d will be referred to as the reflective surface 31 unless otherwise specified. The reflective surface 31 is an example of the second reflective surface of the present invention.

  As shown in FIGS. 3 and 5, the second cylindrical reflecting surface 31 has a rear end opening B2 and a rear end opening B2 so that light from the second light source 32 (light emitting surface) passes through the second cylindrical reflecting surface 31. It is hold | maintained by the holding member 40 in the state which the 2nd light source 32 (light emitting surface) opposed. The rear end opening B2 of the second cylindrical reflecting surface 31 surrounds the second light source 32 (light emitting surface) in a front view (not shown).

  The second cylindrical reflection surface 31 includes, for example, screw holes N3 and N4 provided on the left and right sides and a screw (not shown) inserted in a screw hole (not shown) formed in the substrate K. Is held by the holding member 40 by screwing.

  As shown in FIGS. 3 and 6, the reflective surface 31b provided below includes an extended reflective surface 31b1 extended forward from the reflective surface 31a provided above.

  The second light source 32 is a semiconductor light emitting element such as an LED or an LD provided with a rectangular (for example, 1 mm square) light emitting surface. The second light source 32 is mounted on the substrate K with the light emitting surface facing forward (front). The number of second light sources 32 is not particularly limited, and may be one or more. In the case of a plurality of second light sources 32, the second light sources 32 are arranged in a line in the horizontal direction.

  As described above, the first light source 22 and the second light source 32 are disposed on the mounting surface (planar plane PL1, see FIG. 3) of the substrate K. The mounting surface (plane PL1) of the substrate K is a plane orthogonal to the first optical axis AX1 (and the second optical axis AX2). The mounting surface (plane PL1) of the substrate K is an example of the first plane of the present invention.

  The second projection lens 33 performs a second projection so that the direct light from the second light source 32 (light emitting surface) which has passed through the second cylindrical reflecting surface 31 and the reflected light from the second cylindrical reflecting surface 31 are transmitted. It is hold | maintained by the holding member 40 in the state which the back surface 33b of the lens 33 and the front end opening B1 of the 2nd cylindrical reflection surface 31 opposed (refer FIG. 3, FIG. 5).

  As shown in FIGS. 1 and 2, the second projection lens 33 is integrally formed with the first projection lens 23 and the leg 50, and is a screw inserted into the screw holes N5 and N6 provided in the leg 50. The screw (not shown) is held by the holding member 40 by screwing it to the holding member 40.

  As shown in FIG. 2, the second projection lens 33 has a rectangular outer shape in a front view, and a size in a front view is substantially the same size as the first projection lens 23, and has a longitudinal cross section as shown in FIG. Is configured as a lens of substantially the same size as the first projection lens 23.

  As shown in FIG. 3, the first projection lens 23 (back surface 23b) and the second projection lens 33 (back surface 33b) are disposed on a plane PL2 parallel to the plane PL1. The plane PL2 is a plane orthogonal to the first optical axis AX1 (and the second optical axis AX2). The plane PL2 is an example of the second plane of the present invention.

The focal length of the second projection lens 33 is longer than the focal length of the first projection lens 23. As shown in FIG. 3, the focus F ₃₃ of the second projection lens 33 is directed to the vertical direction, is located near the center of the second light source 32 (light emitting surface). On the other hand, the position of the focal point F ₃₃ of the second projection lens 33 is directed to the horizontal direction, different for each portion of the second projection lens 33.

For example, as shown in FIG. 8, in the lens unit 33L on the left side with respect to the second optical axis AX2, the focal point F _33A of the lens unit 33A far from the second optical axis AX2 is positioned near to the second optical axis AX2. Do. On the other hand, as shown in FIG. 9, focus _{F 33B} of the lens portion 33B closer to the second light axis AX2 is located far from the second optical axis AX2. The focal point of the intermediate lens unit between the lens unit 33A and the lens unit 33B is located between the focal point _F33A and the focal point _F33B . The same applies to the lens unit 33R on the right side with respect to the second optical axis AX2.

As a result, the focal point F ₃₃ of the second projection lens 33 is directed to the horizontal direction, rather than focus becomes the focal line. Further, in the surface 33a of the second projection lens 33, a portion L where the left lens portion 33L and the right lens portion 33R are joined has a concaved shape toward the second light source 32. In the surface 33a of the second projection lens 33, a portion L where the left lens unit 33L and the right lens unit 33R are joined is a vertical plane including the surface 33a of the second projection lens 33 and the second optical axis AX. And intersect with each other (see FIGS. 1 and 2).

In the second optical system 30 configured as described above, when the second light source 32 is turned on, the direct light from the second light source 32 and the reflected light from the second cylindrical reflection surface 31 pass through the second projection lens 33 to be forward Irradiated. Thus, the high beam distribution pattern P _Hi is formed.

FIG. 7B is an example of the high beam light distribution pattern P _Hi . FIG. 7B shows an example of a high beam light distribution pattern P _Hi formed on a virtual vertical screen facing the front of the vehicle.

FIG. 7C is an example of a light distribution pattern P _{Hi — 1} formed by the light controlled by the left lens unit 33L. FIG. _{7D is} an example of a light distribution pattern P _{Hi — 2} formed by the light controlled by the right lens unit 33R. By 7 and the light distribution pattern _{P Hi_2} shown in the light distribution pattern _{P Hi_1} and Figure 7 (d) shown in (c) are superimposed, the high-beam light distribution pattern _{P Hi} shown in FIG. 7 (b) is formed Ru.

As shown in FIG. 7B, in the high beam light distribution pattern P _Hi , the thickness W1 in the vertical direction above the horizontal line H is thicker than the thickness W2 in the vertical direction below the horizontal line H.

  This is because the reflecting surface 31b provided below includes the extended reflecting surface 31b1 extended forward of the reflecting surface 31a provided above (see FIGS. 3 and 6).

Further, the light distribution pattern P _Hi for high beam is relatively bright in the vicinity of the intersection of the H line and the V line, and is excellent in the wide visibility in the horizontal direction. The reason is as follows.

  8 to 10 are views for explaining the relationship between the second projection lens 33 and the light source image.

As shown in FIG. 8, in the lens unit 33L on the left side, a light source image I _{33A of} the second light source 32 (light emitting surface) is an H line on the virtual vertical screen by the lens unit 33A far from the second optical axis AX2. It is projected near the point of intersection with the V-line.

Further, as shown in FIG. 9, the light source image I ₃₃ B of the second light source 32 (light emitting surface) is at the intersection point of the H line and the V line on the virtual vertical screen by the lens portion 33 B closer to the second optical axis AX2. Projected to the right side.

Further, as shown in FIG. 10, the second light source 32 (light emitting surface) is formed by the intermediate lens portion 33C between the lens portion 33A far from the second optical axis AX2 and the lens portion 33B close to the second optical axis AX2. The light source image I _{33 C 1} is projected to a position (intermediate position between the light source image I _{33 A} and the light source image I _{33 B} ) shifted to the right with respect to the intersection of the H line and the V line on the virtual vertical screen.

The light source images I _33A , I _33B and I _33C1 illustrated in FIGS. 8 to 10 are actually superimposed. As a result, a light distribution pattern P _{Hi — 2} shown in FIG. _{7D in} which the vicinity of the intersection between the H line and the V line is relatively bright is formed. Similarly in the lens portion 33R, a light distribution pattern P _{Hi — 1} shown in FIG. 7C in which the vicinity of the point of intersection between the H line and the V line is relatively bright is formed.

Then, by the light distribution pattern _{P Hi_2} shown in the light distribution pattern _{P Hi_1} and Figure 7 (d) shown in FIG. 7 (c) are superimposed, the light distribution pattern _{P Hi} for high beam shown in FIG. 7 (b) It is formed. As a result, the high beam light distribution pattern P _Hi becomes relatively bright in the vicinity of the intersection point of the H line and the V line.

Further, as shown in FIG. 10, in the lens unit 33L on the left side, a light source image I _33c2 of the second light source 32 (light emitting surface) by the reflected light from the reflecting surface 31c provided on the left by the lens unit 33C is The light source image I _{33 C 1} (the light source image I _{33 A} , I _{33 B} ) is projected with being shifted to the left. The same applies to the right lens unit 33R. As a result, the light distribution pattern for high beam P _Hi becomes wide in the horizontal direction.

For the above reasons, the high beam light distribution pattern P _Hi is relatively bright in the vicinity of the point of intersection between the H line and the V line, and is excellent in the wide visibility in the horizontal direction.

  As described above, according to the present embodiment, it is possible to provide a vehicle lamp unit (that can be miniaturized) in which the dimension in the vehicle front-rear direction can be shortened as compared with the above-described conventional technology.

  This is because both the first optical system 20 and the second optical system 30 are configured as direct projection type optical systems.

  Further, according to the present embodiment, the first light source 22 and the second light source 32 are disposed on the same mounting surface (the plane PL1, see FIG. 3) of the same substrate K, and the first projection lens 23 and the second projection It is possible to provide the vehicle lamp unit 10 of a simple structure in which the lenses 33 are disposed on the same plane PL2.

This is a first cylindrical reflective surface 21 is provided between the first projection lens 23 and the first light source 22, the focal point F ₂₃ of the relatively short focal length first projection lens 23 provided in the lower it was positioned in the vicinity of the front end edge 21b1 of the reflecting surface 21b, and a relatively focal length focus F ₃₃ of the long second projection lens 33 and the second light source 32 (light emitting surface) that is located in the vicinity, by It is.

  Further, according to the present embodiment, the first light source 22 and the second light source 32 are disposed on the same substrate K, and the first projection lens 23 and the second projection lens 33 are integrally molded, so that assembly is easy. The vehicle lamp unit 10 can be provided.

Further, according to the present embodiment, the thickness W1 in the vertical direction above the horizontal line H of the light distribution pattern for high beam P _Hi can be made thicker than the thickness W2 in the vertical direction below the horizontal line H (FIG. b) see). Thereby, the irradiation range in the upward direction can be expanded, and it is possible to suppress that the front side becomes too bright and the distant visibility declines.

  This is because the reflective surface 31b provided below includes the extended reflective surface 31b1 extended forward from the reflective surface 31a provided above (see FIG. 3 and FIG. 6D).

  Further, according to the present embodiment, since the first cylindrical reflecting surface 21 is provided, the light from the first light source 22 can be used as the first projection lens 23 as compared with the case where the first cylindrical reflecting surface 21 is not provided. It can be imported efficiently. Similarly, since the second cylindrical reflection surface 31 is provided, light from the second light source 32 can be efficiently taken into the second projection lens 33 as compared to the case where the second cylindrical reflection surface 31 is not provided. .

  FIG. 11 is a view for explaining problems when the first optical system 20 is disposed on the lower side and the second optical system 30 is disposed on the upper side.

  As shown in FIG. 11, when the first optical system 20 is disposed on the lower side and the second optical system 30 is disposed on the upper side, the light is reflected by the first cylindrical reflection surface 21 (reflection surface 21 b provided below). The reflected light RayB is transmitted through the second projection lens 33 and illuminated in the sky, which may cause glare light.

  On the other hand, according to the present embodiment, as shown in FIG. 3, the first optical system 20 is disposed on the upper side and the second optical system 30 is disposed on the lower side. The reflected light reflected by the provided reflecting surface 21 b is transmitted through the second projection lens 33 and illuminated in the sky, so that generation of glare light can be suppressed. In addition, as shown in FIG. 3, when the first optical system 20 is disposed on the upper side and the second optical system 30 is disposed on the lower side, the light is reflected by the first cylindrical reflecting surface 21 (the reflecting surface 21a provided on the upper side). The reflected light RayA thus transmitted is transmitted through the second projection lens 33, but the reflected light RayA transmitted through the second projection lens 33 is irradiated downward (in the direction of the road surface). Glare light does not occur.

  Next, a modification is described.

  Although the said embodiment demonstrated the example which applied the vehicle lamp unit of this invention to the headlamp for vehicles (head lamp), it does not restrict to this. For example, the vehicle lamp of the present invention may be applied to a vehicle lamp other than a vehicle headlamp (head lamp).

  Moreover, although the said embodiment demonstrated the example which comprised the 1st optical system 20 and the 2nd optical system 30 as one vehicle lamp unit 10 unit, it does not restrict to this. For example, the first optical system 20 may be configured as one vehicle lamp unit, and the second optical system 30 may be configured as another vehicle lamp unit.

In the above embodiment, as the second projection lens 33, the farther the lens portion 33A from the second optical axis AX2 focus _{F 33A} is located near the second optical axis AX2, the lens unit 33B close to the second optical axis AX2 more focus F _33B has been described using a lens positioned far from the second optical axis AX2 is not limited thereto. For example, on the contrary, first as second projection lens 33, the lens unit 33B as focus _{F 33B} closer to the second optical axis AX2 is located far from the second optical axis AX2, farther lens unit from the second optical axis AX2 A lens in which the focal point F _33A is positioned closer to the second optical axis AX2 by about _33A may be used.

  The lenses 23 and 33 can be formed by applying regular structures, for example, dots, cuts, or dimples, to the front surface 23a or the back surface 23b of the first projection lens 23 and the front surface 33a or the back surface 33b of the second projection lens 33. The transmitted light may be diffused.

  Each numerical value shown in each above-mentioned embodiment is an illustration, and it is needless to say that an appropriate numerical value different from this can be used.

  The above embodiments are merely illustrative in every respect. The present invention should not be construed as being limited by the description of each of the above embodiments. The present invention can be embodied in other various forms without departing from the spirit or main features thereof.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp unit, 20 ... 1st optical system, 21 ... 1st cylindrical reflection surface, 21b1 ... front end edge, 22 ... 1st light source, 23 ... 1st projection lens, 23b ... back surface, 30 ... 2nd optical 31: second cylindrical reflection surface 31b1 extended reflection surface 32 second light source 33 second projection lens 40 holding member

Claims (4)

A vehicle lamp unit comprising: a first optical system for forming a light distribution pattern for low beam; and a second optical system for forming a light distribution pattern for high beam,
The first optical system is
A first cylindrical reflecting surface constituted by first reflecting surfaces provided on the upper, lower, left, and right sides, the front end opening being larger than the rear end opening and being narrower in a cone shape as going from the front end opening to the rear end opening;
A first light source provided opposite to the rear end opening;
A focal point is provided in the vicinity of the front end edge of the reflective surface provided below the front surface opening, facing the front end opening, and the direct light from the first light source and the first cylindrical reflective surface A first projection lens for emitting light reflected from the first light source reflected by the light forwardly,
A front end edge of a reflective surface provided below the first reflective surface is configured in a shape corresponding to a cutoff line of the low beam light distribution pattern,
The second optical system is
A second cylindrical reflecting surface constituted by second reflecting surfaces provided on the upper, lower, left, and right sides which becomes narrower in a conical shape as the front end opening becomes larger than the rear end opening toward the rear end opening from the front end opening;
A second light source provided opposite to the rear end opening;
It is provided opposite to the front end opening, a focal point is provided in the vicinity of the second light source, direct light from the second light source and reflected light from the second light source reflected by the second cylindrical reflection surface And a second projection lens for emitting light forwardly,
The first optical system and the second optical system are arranged in parallel,
The first light source and the second light source are disposed on a first plane,
The said 1st projection lens and the said 2nd projection lens are the vehicle lamp units arrange | positioned on the 2nd plane ahead of the said 1st plane. The first light source and the second light source are mounted on the same substrate,
The vehicle lamp unit according to claim 1, wherein the first projection lens and the second projection lens are integrally formed.   The vehicle lamp unit according to claim 1 or 2, wherein the reflecting surface provided below the second reflecting surface includes an extended reflecting surface extended forward from the reflecting surface provided above. In a vehicle lamp forming a light distribution pattern for high beam,
A cylindrical reflecting surface constituted by reflecting surfaces provided on the upper, lower, left, and right sides, the front end opening becoming larger in a cone shape as the front end opening becomes larger than the rear end opening toward the rear end opening;
A light source provided opposite to the rear end opening;
A projection lens provided opposite to the front end opening, provided with a focal point in the vicinity of the light source, and emitting forward light from the light source and reflected light from the light source reflected by the cylindrical reflecting surface; Equipped with
The vehicle lamp unit includes a reflecting surface provided below the reflecting surfaces provided on the upper, lower, left, and right sides, and an extended reflecting surface extended forward from a reflecting surface provided on the upper.

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