JP2013149443A - Vehicular lamp unit and vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp unit in which a projection lens does not move at an optical axis adjustment and appearance is not affected.SOLUTION: A vehicular lamp unit includes a plurality of optical systems including projection lenses, light sources which are arranged at a focal point on a rear side of the projection lens or in the vicinity of the same and emit light which transmits the projection lenses and forms a prescribed light distribution patterns, and shade parts which are arranged at a rear side focal point or its vicinity and still at a position nearer the projection lenses than the light sources and shield a part of the light from the light sources; a movable shade including each of the shade parts of the plurality of the optical systems; a supporting means for supporting the movable shade movably in a perpendicular direction and/or in a horizontal direction inside a perpendicular face orthogonally crossing a lamp optical axis against each of the projection lens of each of the plurality of the optical systems; and a fixing means for fixing the movable shade at an arbitral position after moving.The projection lenses of the plurality of the optical systems and the light sources are fixed on a vehicle side and each of the projection lenses of the plurality of the optical systems has the same focal distance.

Description

  The present invention relates to a vehicular lamp unit and a vehicular lamp, and more particularly to a vehicular lamp unit and a vehicular lamp that are adjustable in optical axis.

  Conventionally, in the field of vehicle lamps, as shown in FIG. 19, a support member 220 (that is, fixed to the support member 220) by an aiming mechanism 230 connected to the support member 220 to which a plurality of vehicle lamp units 210 are fixed. There is known a vehicular lamp 200 that adjusts an optical axis by tilting each vehicular lamp unit 210 as a whole (see, for example, Patent Document 1).

Japanese Patent No. 4264335

  However, since the vehicular lamp 200 described in Patent Document 1 is configured to tilt the entire vehicular lamp unit 210 (including the projection lens 211) to adjust the optical axis, each vehicular lamp unit is adjusted when adjusting the optical axis. There is a problem in that the projection lens 211 of 210 moves greatly and a gap is not formed between the projection lens 211 and a member (such as the inner panel 240) arranged around the projection lens 211, which affects the appearance.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a vehicular lamp unit and a vehicular lamp in which the projection lens does not move during optical axis adjustment and does not affect the appearance. .

  In order to achieve the above object, the invention according to claim 1 is arranged at a projection lens and a rear reference point of the projection lens or in the vicinity thereof to form a predetermined light distribution pattern through the projection lens. A light source that radiates the light, and a shade portion that is disposed at or near the rear reference point of the projection lens and near the projection lens relative to the light source, and shields part of the light from the light source. A plurality of optical systems, a movable shade including a shade portion of each of the plurality of optical systems, and the movable shade in a vertical plane perpendicular to a lamp optical axis with respect to each projection lens of the plurality of optical systems. Support means for supporting the movable shade so as to be movable in the vertical direction and / or horizontal direction, and fixing means for fixing the movable shade at an arbitrary position after the movement. Lens and the light source is fixed to the vehicle side, the plurality of optical systems each projection lens, and wherein the distance between the reference point and the projection lens is identical.

  According to the first aspect of the present invention, unlike the conventional case in which the entire vehicle lamp unit is tilted to adjust the optical axis, the optical axis is adjusted by moving only the movable shade without tilting the entire vehicle lamp unit. It becomes possible to do. Accordingly, it is possible to realize a vehicular lamp unit in which the projection lens does not move at all during the optical axis adjustment and has no influence on the appearance.

  The invention according to claim 2 is a projection lens, and a light source that is arranged at or near the rear reference point of the projection lens and emits light for forming a predetermined light distribution pattern through the projection lens. A plurality of optical systems comprising: a rear reference point of the projection lens or the vicinity thereof, and a shade portion that is disposed at a position closer to the projection lens than the light source and shields part of the light from the light source; A movable shade including shade portions of each of the plurality of optical systems, and the movable shade with respect to a projection lens of each of the plurality of optical systems around a rotation axis extending in a direction parallel to the lamp optical axis. Support means for supporting the movement, and fixing means for fixing the movable shade at an arbitrary position after the movement. The projection lens and the light source of each of the plurality of optical systems are fixed to the vehicle side. Oh , The ratio of the distance from the rotational axis to the optical axis of each of the plurality of optical systems, characterized in that equal to the ratio of the distance between the reference point and the projection lens of the plurality of optical systems each of the projection lens.

  According to the second aspect of the present invention, unlike the conventional case where the optical axis is adjusted by tilting the entire vehicle lamp unit, only the movable shade is swung without tilting the entire vehicle lamp unit. It becomes possible to adjust. Accordingly, it is possible to realize a vehicular lamp unit in which the projection lens does not move at all during the optical axis adjustment and has no influence on the appearance.

  According to a third aspect of the present invention, in the second aspect of the invention, the optical system including the projection lens having the longest distance between the reference point and the projection lens among the plurality of optical systems has the most concentrated light distribution pattern. The other optical system is characterized in that a light distribution pattern having a wide horizontal spread is formed as the distance between the reference point of the projection lens and the projection lens becomes shorter.

  According to the third aspect of the present invention, it is possible to form a synthetic light distribution pattern excellent in distance visibility in which the illuminance at the center is high and the illuminance decreases as it goes toward the periphery.

  According to a fourth aspect of the present invention, the projection lens, the light source, and the light emitted from the light source are arranged in the radiation direction of the light source so that the light incident from the light source is an optical axis of the projection lens. A reflecting surface configured to be condensed and transmitted through the projection lens to form a predetermined light distribution pattern; a rear reference point of the projection lens or in the vicinity thereof; and closer to the projection lens than the light source A plurality of optical systems, each of the plurality of optical systems including a shade section that blocks a part of light from the light source, a movable shade including a shade section of each of the plurality of optical systems, and the movable shade, Support means for supporting the projection lens of each of a plurality of optical systems so as to be swingable about a rotation axis extending in a direction parallel to the optical axis of the lamp, and fixing the movable shade to an arbitrary position after movement. Do And a projection lens, a light source, and a reflecting surface of each of the plurality of optical systems are fixed to the vehicle side, and a distance from the rotation axis to each of the optical axes of the plurality of optical systems is determined. The ratio is equal to the ratio of the distance between the reference point of the projection lens of each of the plurality of optical systems and the projection lens.

  According to the fourth aspect of the present invention, unlike the conventional case where the optical axis is adjusted by tilting the entire vehicle lamp unit, only the movable shade is swung without tilting the entire vehicle lamp unit. It becomes possible to adjust. Accordingly, it is possible to realize a vehicular lamp unit in which the projection lens does not move at all during the optical axis adjustment and has no influence on the appearance.

  According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the optical system including the projection lens having the longest distance between the reference point and the projection lens among the plurality of optical systems has the most concentrated light distribution pattern. The other optical system is characterized in that a light distribution pattern having a wide horizontal spread is formed as the distance between the reference point of the projection lens and the projection lens becomes shorter.

  According to the fifth aspect of the present invention, it is possible to form a synthetic light distribution pattern excellent in distance visibility in which the illuminance at the center is high and the illuminance decreases as it goes toward the periphery.

  The invention described in claim 6 can also be specified as follows. A vehicular lamp using the vehicular lamp unit according to any one of claims 1 to 5.

  According to the present invention, it is possible to provide a vehicular lamp unit and a vehicular lamp that do not move the projection lens when adjusting the optical axis and do not affect the appearance.

1 is a perspective view of a vehicular lamp unit 10. FIG. 1 is an exploded perspective view of a vehicular lamp unit 10. FIG. 1 is a front view of a vehicular lamp unit 10. FIG. 1 is a top view of a vehicular lamp unit 10. FIG. It is a perspective view of the vehicular lamp unit 10 from which a lens is omitted. It is an example of the synthetic | combination light distribution pattern formed on a virtual vertical screen by the vehicle lamp unit. 2 is a perspective view of a vehicle lamp unit 20. FIG. 2 is an exploded perspective view of a vehicle lamp unit 20. FIG. 2 is a front view of a vehicle lamp unit 20. FIG. 3 is a top view of the vehicular lamp unit 20. FIG. It is a perspective view of vehicle lamp unit 20 which omitted a lens. It is an example of the synthetic | combination light distribution pattern formed on a virtual vertical screen by the vehicle lamp unit 20. FIG. 2 is a perspective view of a vehicle lamp unit 30. FIG. 2 is an exploded perspective view of a vehicle lamp unit 30. FIG. 3 is a front view of the vehicular lamp unit 30. FIG. 4 is a top view of the vehicular lamp unit 30. FIG. (A) a vehicular lamp unit 30, cross-sectional view taken along a vertical cross section including the optical axis AX _1, is a cross-sectional view taken along (b) a vehicle lamp unit 30, a vertical cross section including the optical axis AX _2. It is an example of the synthetic | combination light distribution pattern formed on a virtual vertical screen by the vehicle lamp unit 30. FIG. It is a horizontal sectional view of the vehicular lamp 200 that performs conventional optical axis adjustment.

[First Embodiment]
Hereinafter, as a first embodiment of the present invention, a vehicular lamp unit 10 capable of simultaneously adjusting the optical axes of a plurality of direct projection optical systems 10A to 10D by moving one movable shade 13 will be described. To do.

  The vehicular lamp unit 10 of the present embodiment is a vehicular headlamp (headlamp), and is disposed on both the left and right sides of the front surface of a vehicle such as an automobile. The left and right vehicle lamp units 10 are symmetrical and have the same configuration. Hereinafter, the vehicle lamp unit 10 disposed on the left side will be mainly described.

  1 is a perspective view of the vehicular lamp unit 10, FIG. 2 is an exploded perspective view, FIG. 3 is a front view, FIG. 4 is a top view, and FIG. 5 is a perspective view of the vehicular lamp unit 10 with a lens omitted. FIG. 6 is an example of a combined light distribution pattern formed on the virtual vertical screen by the vehicle lamp unit 10.

  As shown in FIGS. 1 to 5, the vehicular lamp unit 10 includes a plurality of lenses 11 (11 a to 11 d), a plurality of light sources 12 (12 a to 12 d), a movable shade 13, a guide member 14, a guide fixing screw 15, A vertical adjustment screw 16, a horizontal adjustment screw 17, a bracket 18, a lens holder 19 and the like are provided.

As shown in FIG. 4, the lenses 11 (11a to 11d) are lenses having the same focal length f. The optical origins F _{11a to} F _11d (corresponding to the rear focal point) on the rear side of the lens 11 ( _11a to _11d ) are located in the same vertical plane orthogonal to the lamp optical axis AX. The lenses 11 (11a to 11d) are arranged at a predetermined interval in the horizontal direction when viewed from the front (see FIG. 3). The lens 11 (11a to 11d) is fixed to a vehicle side such as a housing or a body frame via a bracket 18. The lens 11a is a lens having a focal point that makes the light emitted from the light source 12a parallel light, and the lenses 11b to 11d have a focal point that makes the light emitted from the light sources 12b to 12d spread. It is a lens that does not have.

  The reference point shown in the present invention refers to a focal position when using the lens 11a that converts the light emitted from the light source 12a into parallel light, and spreads to the light emitted from the light sources 12b to 12d. When using the lenses 11b to 11d that do not have a focal point to be provided, the light source position indicates that the intended light distribution can be formed from the lens by design.

Hereinafter, the optical axes of the lenses 11 a to ₁₁ d are referred to as AX ₁ to AX ₄ . The optical axes AX _{1 to} AX ₄ are parallel to the lamp optical axis AX and extend in the vehicle front-rear direction, like the lamp optical axis AX.

As shown in FIGS. 2 to 4, the first lens 11 a is held by a lens holder 19 fixed to the front surface 18 a of the bracket 18 with screws, and is disposed in front of the first light source 12 a and on the optical axis AX _1. ing. The first lens 11a is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface). Emitting surface shape of the first lens 11a is a lens surface to be irradiated forward light emitted from the optical origin F _11a and transmitted through the first lens 11a as collimated light.

The second lens 11b is held by a lens holder 19 which is screwed to the front 18a of the bracket 18 is disposed on the front and the optical axis AX ₂ of the second light source 12b. The second lens 11b is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface). Emitting surface shape of the second lens 11b, in the horizontal cross-section, the light beam incident radiated from the optical origin F _11b and the incident surface of the second lens 11b, and irradiated forward as diffused light diffuses to left and right sides In the vertical cross section, a light beam radiated from the optical origin F _11b and incident on the incident surface of the second lens 11b is irradiated forward as light vertically deflected away from the optical axis AX _{2 in the} vertical direction. It is supposed to be a lens surface.

The third lens 11c is held by the lens holder 19 which is screwed to the front 18a of the bracket 18 is disposed on the front and the optical axis AX ₃ of the third light source 12c. The third lens 11c is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface). In the horizontal cross section, the exit surface shape of the third lens 11c is diffused light (second lens 11b) that diffuses a light beam emitted from its optical origin F _11c and incident on the entrance surface of the third lens 11c to the left and right sides. The light beam emitted from the optical origin F _11c and incident on the incident surface of the third lens 11c is separated from the optical axis AX _{3 in the} vertical direction. Accordingly, the lens surface irradiates forward as light deflected vertically downward (the degree of deflection is greater than that of the second lens 11b).

The fourth lens 11d is held by a lens holder 19 which is screwed to the front 18a of the bracket 18 is disposed on the front and the optical axis AX ₄ of the fourth light source 12d. The fourth lens 11d is, for example, a projection lens whose front surface (exiting surface) is convex and whose rear surface (incident surface) is flat. In the horizontal cross section, the exit surface shape of the fourth lens 11d is diffused light (third lens 11c) that diffuses a light beam emitted from its optical origin F _11d and incident on the entrance surface of the fourth lens 11d to the left and right sides. In the vertical section, a light beam emitted from the optical origin F _11d and incident on the incident surface of the fourth lens 11d is separated from the optical axis AX _{4 in the} vertical direction. Accordingly, the lens surface irradiates forward as light deflected vertically downward (the degree of deflection is larger than that of the third lens 11c).

  The lens 11 (11a to 11d) may be integrally molded by injecting a transparent resin (such as acrylic or polycarbonate) into a mold, cooled, and solidified, or may be molded as individual parts. . The material of the lens 11 (11a to 11d) may be any material that can form a desired light distribution by refracting light (visible light) emitted from the light source 12 (12a to 12d). For example, glass may be used.

  As shown in FIGS. 2 to 4, the light sources 12 (12 a to 12 d) have a predetermined interval in the horizontal direction within the same vertical plane orthogonal to the lamp optical axis AX (in this embodiment, the front surface 18 a of the bracket 18). Arranged in a row. The light sources 12 (12 a to 12 d) are fixed to the vehicle side such as a housing or a body frame via a bracket 18.

The first light source 12a is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface is directed to the first lens 11a. in is mounted on a metal substrate Ka which is fixed to the front surface 18a of the bracket 18 is disposed on the optical axis AX ₁ above (optical origin F _11a or near the rear side of the first lens 11a). The first light source 12a, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _1.

The second light source 12b is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface is directed to the second lens 11b. in is mounted on a metal substrate Kb which is fixed to the front surface 18a of the bracket 18 is disposed on the optical axis AX ₂ above (optical origin F _11b or near the rear side of the second lens 11b). The second light source 12b, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _2.

The third light source 12c is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface is directed to the third lens 11c. in it is mounted on a metal substrate Kc which is fixed to the front surface 18a of the bracket 18 is disposed on the optical axis AX ₃ (optical origin F _11c or near the rear side of the third lens 11c). The third light source 12c, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _3.

The fourth light source 12d is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface is directed to the fourth lens 11d. in it is mounted on a metal substrate Kd which is fixed to the front surface 18a of the bracket 18 is disposed on the optical axis AX ₄ (optical origin F _11d or near the rear side of the fourth lens 11d). The fourth light source 12d, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _4.

  The heat generated by the light source 12 (12a to 12d) is radiated from the radiation fin 18b of the bracket 18. Since the bracket 18 is made of a material having excellent thermal conductivity such as an aluminum alloy, it is possible to efficiently dissipate heat. In addition, it is preferable to interpose thermal conductive members such as thermal conductive grease between the substrates Ka to Kd on which the light sources 12 (12a to 12d) are mounted and the front surface 18a of the bracket 18. In this way, it is possible to further improve the heat dissipation performance.

  In addition, the light source 12 (12a-12d) should just be a light source with a rectangular light emission part (rectangular light emission surface), and the structure in particular is not ask | required. For example, the light source 12 (12a to 12d) may be a light source having a structure in which an LED element and a phosphor are combined, or may be a light source having a structure in which an LD element and a phosphor are combined.

  As shown in FIGS. 2 to 5, the movable shade 13 is an elongated plate-shaped light shielding member that extends along a vertical plane orthogonal to the lamp optical axis AX.

  The movable shade 13 is supported so as to be movable in the vertical direction and / or the horizontal direction with respect to the lens 11 (11a to 11d) in a vertical plane orthogonal to the lamp optical axis AX (along the vertical plane).

  In the present embodiment, the movable shade 13 is supported by the guide member 14 as follows (corresponding to the support means of the present invention).

  As shown in FIG. 2, the guide member 14 includes a horizontal portion 14a extending in the horizontal direction along a vertical plane orthogonal to the lamp optical axis AX and two vertical portions 14b extending in the vertical direction from both ends of the horizontal portion 14a. And.

  A shaft portion of a guide fixing screw 15 fixed to the front surface 18a of the bracket 18 with a screw is inserted into a horizontally extending guide hole 14c formed in the flange portion of the guide member 14. Thereby, the guide member 14 is guided by the guide hole 14c, and can move in the horizontal direction in a vertical plane orthogonal to the lamp optical axis AX.

  Both ends of the movable shade 13 are inserted into guide grooves 14d extending in the vertical direction formed on the surfaces of the two vertical portions 14b facing each other. Thereby, the movable shade 13 is guided by the guide groove 14d and is movable in the vertical direction within a vertical plane orthogonal to the lamp optical axis AX.

  As shown in FIGS. 3 and 5, the movable shade 13 includes a first shade portion 13a, a second shade portion 13b, a third shade portion 13c, and a fourth shade portion 13d. The movable shade 13 (13a to 13d) is integrally configured by, for example, injecting a material such as aluminum die casting into a mold, and cooling and solidifying.

The first shade portion 13a is a light shielding member that shields part of the light from the first light source 12a. The first shade portion 13a is, for example, an elongated plate-shaped light shielding member extending along a vertical plane orthogonal to the lamp optical axis AX, and in the vicinity of the front of the first light source 12a with the movable shade 13 supported as described above. It covers the lower part of the light emitting surface of the first light source 12a. The upper edge of the first shade portion 13a includes a Z-shaped step portion 13a1. Optical origin _{F 11a} of the first lens 11a is positioned at the upper end edge near the first shade portion 13a. The optical origin F _11a of the first lens 11a may be any upper edge near the first shade section 13a, for example, may be located at the long side near the first light source 12a.

The second shade portion 13b is a light shielding member that shields part of the light from the second light source 12b. The second shade portion 13b is, for example, an elongated plate-shaped light shielding member extending along a vertical plane orthogonal to the lamp optical axis AX, and in the vicinity of the front of the second light source 12b with the movable shade 13 supported as described above. It covers the lower part of the light emitting surface of the second light source 12b. The upper end edge of the second shade portion 13b extends horizontally. In addition, you may provide a Z-shaped level | step-difference part also in the upper end edge of the 2nd shade part 13b. Optical origin _{F 11b} of the second lens 11b is positioned at the upper end edge near the second shade section 13b. The optical origin F _11b of the second lens 11b may be any upper edge vicinity of the second shade section 13b, for example, may be located at the long side near the second light source 12b.

The third shade portion 13c is a light shielding member that shields part of the light from the third light source 12c. The third shade portion 13c is, for example, an elongated plate-shaped light shielding member extending along a vertical plane orthogonal to the lamp optical axis AX, and in the vicinity of the front of the third light source 12c with the movable shade 13 supported as described above. It covers the lower part of the light emitting surface of the third light source 12c. The upper end edge of the third shade portion 13c extends horizontally. In addition, you may provide a Z-shaped level | step-difference part also in the upper end edge of the 3rd shade part 13c. Optical origin _{F 11c} of the third lens 11c is positioned upper edge near the third shade portion 13c. The optical origin F _11c of the third lens 11c may be any upper edge near the third shade section 13b, for example, may be located at the long side near the third light source 12c.

The fourth shade portion 13d is a light shielding member that shields part of the light from the fourth light source 12d. The fourth shade portion 13d is, for example, an elongated plate-like light shielding member extending along a vertical plane orthogonal to the lamp optical axis AX, and in the vicinity of the front of the fourth light source 12d with the movable shade 13 supported as described above. It covers the lower part of the light emitting surface of the fourth light source 12d. The upper end edge of the fourth shade portion 13d extends horizontally. In addition, you may provide a Z-shaped level | step-difference part also in the upper end edge of the 4th shade part 13d. Optical origin _{F 11d} of the fourth lens 11d is located on the upper end edge near the fourth shade portion 13d. The optical origin F _11d of the fourth lens 11d may be any upper edge vicinity of the fourth shade portion 13d, for example, may be located at the long side near the fourth light source 12d.

  Each shade part 13a-13c is connected mutually, and comprises one elongate plate-shaped movable shade 13 extended along the vertical plane orthogonal to lamp | ramp optical axis AX.

  The first lens 11a, the first light source 12a, and the movable shade 13 (first shade portion 13a) configured as described above constitute a first direct projection optical system 10A. According to the first direct projection optical system 10A, the light emitted from the first light source 12a is transmitted through the first lens 11a and irradiated forward as parallel light, and a virtual vertical screen (front of the vehicle) facing the front of the vehicle. A partial light distribution pattern P1 that irradiates the vicinity of the center of the light distribution pattern for the passing beam is formed (see FIG. 6).

  Since the light emitted from the first light source 12a passes through the first lens 11a and is irradiated forward as parallel light, the partial light distribution pattern P1 has a high-condensation (spot-like) high-illuminance pattern and Become.

  In addition, since the light source image of the light emitting surface of the first light source 12a, the lower part of which is covered by the first shade portion 13a, is inverted and projected forward by the action of the first lens 11a, the partial light distribution pattern P1 is The pattern includes a cut-off line CL1 including a Z-shaped step portion defined by the upper edge of the first shade portion 13a at the upper edge.

This cut-off line CL1 is an oblique (for example, 45 °) cut-off line CL1 connecting the own lane side cut-off line CL1 _L extending in the horizontal direction, the opposite lane side cut-off line CL1 _R extending in the horizontal direction, and both cut-off lines CL1 _L and CL1 _{R. S} is included.

  The second lens 11b, the second light source 12b, and the movable shade 13 (second shade portion 13b) configured as described above constitute a second direct projection optical system 10B. According to the second direct projection optical system 10B, the light emitted from the second light source 12b is transmitted through the second lens 11b and diffused to the left and right sides in the horizontal section, and in the vertical section, Light is emitted forward as light deflected vertically downward, and is diffused in a horizontal direction and a vertical direction from the partial light distribution pattern P1 on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. The partial light distribution pattern P2 is formed (see FIG. 6).

  Since the partial light distribution pattern P2 is diffused in the horizontal direction and the vertical direction, the partial light distribution pattern P2 is a pattern that is larger in the horizontal direction and the vertical direction and lower in illuminance than the partial light distribution pattern P1.

  In addition, since the light source image of the light emitting surface of the second light source 12b whose lower part is covered with the second shade portion 13a is reversely projected forward by the action of the second lens 11b, the partial light distribution pattern P2 is The upper end edge includes a cut-off line CL2 extending in the horizontal direction defined by the upper end edge of the second shade portion 13a.

  The third lens 11c, the third light source 12c, and the movable shade 13 (third shade portion 13c) configured as described above constitute a third direct projection optical system 10C. According to the third direct projection optical system 10C, the light emitted from the third light source 12c is transmitted through the third lens 11c and diffused to the left and right sides in the horizontal section, and in the vertical section, Light is emitted forward as light deflected vertically downward, and is diffused in a horizontal direction and a vertical direction from the partial light distribution pattern P2 on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. A partial light distribution pattern P3 is formed (see FIG. 6).

  Since the partial light distribution pattern P3 is diffused in the horizontal direction and the vertical direction, the partial light distribution pattern P3 is a pattern that is larger in the horizontal direction and the vertical direction and lower in illuminance than the partial light distribution pattern P2.

  In addition, since the light source image of the light emitting surface of the third light source 12c whose lower part is covered with the third shade portion 13a is reversely projected forward by the action of the third lens 11c, the partial light distribution pattern P3 is The upper end edge includes a cut-off line CL3 extending in the horizontal direction defined by the upper end edge of the third shade portion 13d.

  The fourth lens 11d, the fourth light source 12d, and the movable shade 13 (fourth shade portion 13d) configured as described above constitute a fourth direct projection optical system 10D. According to the fourth direct projection optical system 10D, the light emitted from the fourth light source 12d is transmitted through the fourth lens 11d and diffused to the left and right sides in the horizontal section, and in the vertical section, Light is emitted forward as light deflected vertically downward, and is diffused in a horizontal direction and a vertical direction from the partial distribution light pattern P3 on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. A partial light distribution pattern P4 is formed (see FIG. 6).

  Since the partial light distribution pattern P4 is diffused in the horizontal direction and the vertical direction, the partial light distribution pattern P4 is a pattern that is larger in the horizontal direction and the vertical direction and lower in illuminance than the partial light distribution pattern P3.

  In addition, since the light source image of the light emitting surface of the fourth light source 12d, the lower part of which is covered by the fourth shade portion 13a, is reversely projected forward by the action of the fourth lens 11d, the partial light distribution pattern P4 is The pattern includes a cut-off line CL4 extending in the horizontal direction defined by the upper edge of the fourth shade portion 13d at the upper edge.

  Each of the partial light distribution patterns P1 to P4 is superimposed as shown in FIG. Thereby, the illuminance of the partial distribution light pattern P1 is the highest, and the combined light distribution pattern (passing beam light distribution pattern) excellent in far visibility in which the illuminance decreases in the order of the partial distribution light patterns P2, P3, P4, and P5. It is formed.

  As shown in FIG. 5, the movable shade 13 (13 a to 13 d) is vertically adjusted in a vertical plane orthogonal to the lamp optical axis AX by adjusting the screwing amount of the vertical adjustment screw 16 and / or the horizontal adjustment screw 17. It moves to a direction and / or a horizontal direction, and is fixed to the arbitrary positions after a movement.

  The vertical adjustment screw 16 is a screw that rotates at the same position around the vertical axis, and is held by the guide member 14 (horizontal portion 14a). The vertical adjustment screw 16 is screwed into a substantially central portion (flange portion) in the horizontal direction of the movable shade 13. The vertical adjustment screw 16 is screwed into the relatively tight movable shade 13 in order to fix the movable shade 13 to an arbitrary position after the movement (corresponding to the fixing means of the present invention).

  When the screwing amount of the vertical adjustment screw 16 to the movable shade 13 is adjusted, the movable shade 13 (13a to 13d) is guided by the guide groove 14d and moves in the vertical direction in the vertical plane orthogonal to the lamp optical axis AX. , Fixed to an arbitrary position after the movement.

  The left / right adjustment screw 17 is a screw that rotates at the same position around the horizontal axis, and is held by the bracket 18. The left / right adjustment screw 17 is screwed into the flange portion of the movable shade 13. The left / right adjustment screw 17 is screwed into the relatively tight movable shade 13 in order to fix the movable shade 13 to an arbitrary position after the movement (corresponding to the fixing means of the present invention).

  When the screwing amount of the left / right adjustment screw 17 to the movable shade 13 is adjusted, the guide member 14 (and the movable shade 13 held by the guide member 14) is guided in the guide hole 14c and is in a vertical plane orthogonal to the lamp optical axis AX. It moves in the horizontal direction and is fixed to an arbitrary position after the movement.

When the movable shade 13 is moved in the vertical direction and / or the horizontal direction in a vertical plane orthogonal to the lamp optical axis AX, the upper edge of the movable shade 13 (13a to 13d) and the rear side of the lens 11 (11a to 11d) are disposed. The relative positional relationship with the optical origins F _{11a to} F _11d changes. In accordance with the change in the relative positional relationship, the partial distribution light patterns P1 to P4 move on the virtual vertical screen as follows.

  For example, when the movable shade 13 (13a to 13d) is moved vertically upward in a vertical plane orthogonal to the lamp optical axis AX, the partial light distribution patterns P1 to P4 move vertically downward on the virtual vertical screen. For example, when the focal length f of the lens 11 (11a to 11d) is 10 [mm], the movable shade 13 (13a to 13d) is 0.35 [mm] vertically upward in a vertical plane orthogonal to the lamp optical axis AX. When moved, the partial light distribution patterns P1 to P4 move 2.0 [deg] vertically downward on the virtual vertical screen.

  On the other hand, when the movable shade 13 (13a to 13d) is moved vertically downward in the vertical plane orthogonal to the lamp optical axis AX, the partial light distribution patterns P1 to P4 move vertically upward on the virtual vertical screen. For example, when the focal length f of the lens 11 (11a to 11d) is 10 [mm], the movable shade 13 (13a to 13d) is 0.35 [mm] vertically downward in the vertical plane orthogonal to the lamp optical axis AX. When moved, the partial light distribution patterns P1 to P4 move 2.0 [deg] vertically upward on the virtual vertical screen.

  On the other hand, when the movable shade 13 (13a to 13d) is moved in the horizontal direction (right direction) in the vertical plane orthogonal to the lamp optical axis AX, the partial distribution light patterns P1 to P4 are displayed in the horizontal direction on the virtual vertical screen ( Move left). For example, when the focal length f of the lens 11 (11a to 11d) is 10 [mm], the movable shade 13 (13a to 13d) is moved in the horizontal direction (right direction) within the vertical plane orthogonal to the lamp optical axis AX. When moved by 35 [mm], the partial distribution light patterns P1 to P4 move 2.0 [deg] in the horizontal direction (left direction) on the virtual vertical screen.

  On the other hand, when the movable shade 13 (13a to 13d) is moved in the horizontal direction (left direction) in the vertical plane orthogonal to the lamp optical axis AX, the partial light distribution patterns P1 to P4 are displayed in the horizontal direction on the virtual vertical screen ( Move to the right). For example, when the focal length f of the lens 11 (11a to 11d) is 10 [mm], the movable shade 13 (13a to 13d) is moved to the horizontal direction (left direction) within the vertical plane perpendicular to the lamp optical axis AX. When moved by 35 [mm], the partial distribution light patterns P1 to P4 move 2.0 [deg] in the horizontal direction (right direction) on the virtual vertical screen.

  Accordingly, the screwing amount of the vertical adjustment screw 16 and the horizontal adjustment screw 17 is adjusted, and the movable shade 13 (13a to 13d) is moved in the vertical direction and / or the horizontal direction in the vertical plane orthogonal to the lamp optical axis AX. Thus, the optical axis can be adjusted by fixing to an arbitrary position after the movement.

  Next, a comparative example will be described.

  The vehicular lamp unit (not shown) of this comparative example (conventional example) uses a fixed shade instead of the movable shade 13 and a vehicular lamp centering on a fulcrum as compared with the vehicular lamp unit 10. The difference is that the optical axis is adjusted by tilting the entire unit. Other than that, it is the structure similar to the vehicle lamp unit 10. FIG.

  When the entire vehicle lamp unit of the comparative example (optical axis direction dimension: 100 [mm]) is tilted about the fulcrum and the optical axis is adjusted (optical axis adjustment angle: 2.0 [deg]), the optical axis is adjusted. Before and after, the end part of the vehicle lamp unit (part farthest from the fulcrum) of the comparative example moved 3.5 [mm] in the horizontal direction (movement amount: 3.5 [mm]).

  On the other hand, in the vehicle lamp unit 10 of the present embodiment, the same angle optical axis adjustment as that in the comparative example was performed. However, the focal length f of the lens 11 (11a to 11d) was set to 10 [mm]. In this case, the lens 13 (13a to 13d) did not move before and after the optical axis adjustment (movement amount: 0 [mm]), and the movable shade 13 moved 0.35 [mm] in the horizontal direction.

  As is clear from the comparative example, according to the present embodiment, it is possible to reduce the amount of movement of the movable part as compared with the vehicle lamp unit of the comparative example (comparative example: 3.5 [mm], This embodiment: 0.35 [mm]). Therefore, according to the present embodiment, it is possible to save the moving space of the movable part.

  As described above, according to the present embodiment, unlike the conventional case in which the entire vehicle lamp unit is tilted to adjust the optical axis, the movable shade 13 is tilted without tilting the entire plurality of direct projection optical systems 10A to 10D. It is possible to adjust the optical axis by moving only the lens. Accordingly, it is possible to realize the vehicular lamp unit 10 in which the lens 11 (11a to 11d) does not move at all during the optical axis adjustment (movement amount: 0 [mm]) and does not affect the appearance at all.

  Further, according to the present embodiment, the lens 11 (11a to 11d) does not move at all when adjusting the optical axis (movement amount: 0 [mm]), and thus the movement of the projection lens of the vehicular lamp unit that has been conventionally required is performed. Spaces can be omitted.

  Further, according to the present embodiment, it is possible to simultaneously adjust the optical axes of the plurality of direct projection optical systems 10A to 10D simply by moving one movable shade 13.

  Next, a modified example will be described.

  In the above embodiment, the example using the four direct projection optical systems 10A to 10D has been described, but the present invention is not limited to this. For example, the number of direct projection optical systems may be two to three or five or more.

[Second Embodiment]
Next, as a second embodiment of the present invention, a vehicular lamp unit 20 capable of simultaneously adjusting the optical axes of a plurality of direct projection optical systems 20A to 20D by swinging one movable shade 23. explain.

  The vehicular lamp unit 20 of the present embodiment is different from the vehicular lamp unit 10 of the first embodiment mainly in that a movable shade 23 supported so as to be swingable is used, and a lens having a different focal length. 21 (21a-21d) is different. Hereinafter, the difference from the vehicular lamp unit 10 of the first embodiment will be mainly described.

  The vehicular lamp unit 20 of the present embodiment is a vehicular headlamp (headlamp), and is disposed on both the left and right sides of the front surface of a vehicle such as an automobile. The left and right vehicle lamp units 20 are symmetrical and have the same configuration. Hereinafter, the vehicle lamp unit 20 arranged on the left side will be mainly described.

  7 is a perspective view of the vehicular lamp unit 20, FIG. 8 is an exploded perspective view, FIG. 9 is a front view, FIG. 10 is a top view, and FIG. 11 is a perspective view of the vehicular lamp unit 20 with a lens omitted. FIG. 12 is an example of a combined light distribution pattern formed on the virtual vertical screen by the vehicle lamp unit 20.

  As shown in FIGS. 7 to 11, the vehicular lamp unit 20 includes a plurality of lenses 21 (21 a to 21 d), a plurality of light sources 22 (22 a to 22 d), a movable shade 23, a movable shade fixing screw 24, and a vertical adjustment screw. 25, a bracket 26, a lens holder 27, and the like. As shown in FIGS. 9 and 10, the vehicle lamp unit 20 is disposed in a lamp chamber 92 configured by combining a front lens 90 and a housing 91.

  As shown in FIG. 10, the lenses 21 (21a to 21d) are projection lenses having different focal lengths. The focal length of the lens 21 (21a to 21d) satisfies the following expression.

[Equation 1]
Focal length f1 of the first lens 21a: focal length f2 of the second lens 21b: focal length f3 of the third lens 21c: focal length f4 of the fourth lens 21d = 4: 3: 2: 1
The optical origins F _{21a to} F _21d (corresponding to the rear focal point) on the rear side of the lens 21 ( _21a to _21d ) are located in the same vertical plane orthogonal to the lamp optical axis AX. The lenses 21 (21a to 21d) are arranged at a predetermined interval in an oblique direction with respect to the horizontal in a front view (see FIG. 9). The lens 21 (21a to 21d) is fixed to a vehicle side such as a housing or a body frame via a bracket 26.

Hereinafter, the optical axes of the lenses 21 a to 21 d are referred to as AX ₁ to AX ₄ . The optical axes AX _{1 to} AX ₄ are parallel to the lamp optical axis AX and extend in the vehicle front-rear direction, like the lamp optical axis AX.

8 to 10, the first lens 21a is held by a lens holder 27 which is screwed to the front 26a of the bracket 26, is disposed on the front and the optical axis AX ₁ of the first light source 22a ing. The first lens 21a is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface). Emitting surface shape of the first lens 21a is a lens surface to be irradiated forward light emitted from the optical origin F _21a and transmitted through the first lens 21a as collimated light.

The second lens 21b is held by a lens holder 27 which is screwed to the front 26a of the bracket 26 is disposed on the front and the optical axis AX ₂ of the second light source 22b. The second lens 21b is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface). In the horizontal cross section, the emission surface shape of the second lens 21b irradiates the light beam emitted from the optical origin F _21b and incident on the incident surface of the second lens 21b forward as diffused light that diffuses to the left and right sides. , in the vertical cross-section, irradiating the light beams incident radiated from the optical origin F _21b and the incident surface of the second lens 21b, with the distance in the vertical direction from the optical axis AX _2, in front as light deflected vertically downward It is supposed to be a lens surface.

The third lens 21c is held by the lens holder 27 which is screwed to the front 26a of the bracket 26 is disposed on the front and the optical axis AX ₃ of the third light source 22c. The third lens 21c is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface). In the horizontal cross section, the exit surface shape of the third lens 21c is diffused light (second lens 21b) that diffuses a light beam emitted from the optical origin F _21c and incident on the entrance surface of the third lens 21c to the left and right sides. irradiated forward as a more degree of diffusion is large), in the vertical cross-section, the light rays incident radiated from the optical origin F _21c in the entrance surface of the third lens 21c, leaving the vertical direction from the optical axis AX ₃ Accordingly, the lens surface irradiates forward as light deflected vertically downward (the degree of deflection is greater than that of the second lens 21b).

The fourth lens 21d is held by a lens holder 27 which is screwed to the front 26a of the bracket 26 is disposed on the front and the optical axis AX ₄ of the fourth light source 22d. The fourth lens 21d is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface). In the horizontal cross section, the exit surface shape of the fourth lens 21d is diffused light (third lens 21c) that diffuses the light beam emitted from the optical origin F _21d and incident on the entrance surface of the fourth lens 21d to the left and right sides. irradiated forward as a more degree of diffusion is large), in the vertical cross-section, the light rays incident radiated from the optical origin F _21d and on the incident surface of the fourth lens 21d, away vertically from the optical axis AX ₄ Accordingly, the lens surface irradiates forward as light deflected vertically downward (the degree of deflection is greater than that of the third lens 21c).

  The lens 21 (21a to 21d) may be integrally formed by injecting a transparent resin (acrylic, polycarbonate, or the like) into a mold, cooled, and solidified, or may be formed as individual parts. . The material of the lens 21 (21a to 21d) may be any material that can refract light (visible light) emitted from the light source 22 (22a to 22d) to form a desired light distribution. For example, glass may be used.

As shown in FIGS. 8 to 10, the light sources 22 (22 a to 22 d) are oblique to the horizontal in the same vertical plane (in this embodiment, the front surface 26 a of the bracket 26) orthogonal to the lamp optical axis AX. (In this embodiment, along the straight line L _s extending obliquely with respect to the horizontal in the same vertical plane orthogonal to the lamp optical axis AX and passing through the rotation axis 24a of the movable shade 23), Arranged to meet.

[Equation 2]
Distance L1 from the rotational axis 24a of the movable shade 23 to the first light source 22a (optical axis AX ₁ ) L1: Distance from the rotational axis 2a of the movable shade 23 to the second light source 22b (optical axis AX ₂ ) L2: of the movable shade 23 Distance L3 from rotation axis 24a to third light source 22c (optical axis AX ₃ ): Distance L4 from rotation axis 24a of movable shade 23 to fourth light source 22d (optical axis AX ₄ ) = focal length f1 of first lens 21a : Focal length f2 of second lens 21b: focal length f3 of third lens 21c: focal length f4 of fourth lens 21d = 4: 3: 2: 1
Thus, the ratio of the distance from the rotation axis 24a of the movable shade 23 to the light sources 22a to 22d (the optical axis _AX 1 _{~AX 4)} is equal to the ratio of the focal length of the lens 21a to 21d.

  The light source 22 (22a to 22d) is fixed to a vehicle side such as a housing or a body frame via a bracket 26.

The first light source 22a is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface is directed to the first lens 21a. in is mounted on a metal substrate Ka which is fixed to the front surface 26a of the bracket 26 is disposed on the optical axis AX ₁ above (optical origin F _21a or near the rear side of the first lens 21a). The first light source 22a, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _1.

The second light source 22b is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface is directed to the second lens 21b. in is mounted on a metal substrate Kb which is fixed to the front surface 26a of the bracket 26 is disposed on the optical axis AX ₂ above (optical origin F _21b or near the rear side of the second lens 21b). The second light source 22b, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _2.

The third light source 22c is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface faces the third lens 21c. in it is mounted on a metal substrate Kc which is fixed to the front surface 26a of the bracket 26 is disposed on the optical axis AX ₃ (optical origin F _21c or near the rear side of the third lens 21c). Third light source 22c, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _3.

The fourth light source 22d is a semiconductor light emitting element having a rectangular light emitting portion (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting portions), and the light emitting surface is directed to the fourth lens 21d. in it is mounted on a metal substrate Kd which is fixed to the front surface 26a of the bracket 26 is disposed on the optical axis AX ₄ (optical origin F _21d or near the rear side of the fourth lens 21d). The fourth light source 22d, the long sides are arranged symmetrically with respect to the horizontal and the optical axis AX _4.

  Heat generated by the light source 22 (22a to 22d) is radiated from the radiation fins 26b of the bracket 26. Since the bracket 26 is made of a material having excellent thermal conductivity such as an aluminum alloy, it is possible to efficiently dissipate heat. In addition, it is preferable to interpose heat conductive members such as heat conductive grease between the substrates Ka to Kd on which the light sources 22 (22a to 22d) are mounted and the front surface 26a of the bracket 26. In this way, it is possible to further improve the heat dissipation performance.

  In addition, the light source 22 (22a-22d) should just be a light source with a rectangular light emission part (rectangular light emission surface), and the structure in particular is not ask | required. For example, the light source 22 (22a to 22d) may be a light source having a structure in which an LED element and a phosphor are combined, or may be a light source having a structure in which an LD element and a phosphor are combined.

  As shown in FIGS. 8 to 11, the movable shade 23 is an elongated plate-shaped light shielding member that extends along a vertical plane orthogonal to the lamp optical axis AX.

  The movable shade 23 has a base end portion (rotating shaft 24a) as a center and a vertical direction with respect to the lens 21 (21a to 21d) in a vertical plane perpendicular to the lamp optical axis AX (along the vertical plane). It is supported so that it can swing.

  In the present embodiment, the movable shade 23 is supported by the movable shade fixing screw 24 as follows (corresponding to the support means of the present invention).

  As shown in FIG. 8, the shaft portion 24 a of the movable shade fixing screw 24 fixed to the front surface 26 a of the bracket 26 is inserted into the opening 23 g formed at the proximal end portion of the movable shade 23. Thereby, the movable shade 23 can swing in the vertical direction around the shaft portion 24a (rotating shaft 24a) in a vertical plane perpendicular to the lamp optical axis AX. A shaft portion 24a (rotating shaft 24a) of the movable shade fixing screw 24 is parallel to the lamp optical axis AX and extends in the vehicle front-rear direction, like the lamp optical axis AX.

  As shown in FIGS. 9 and 11, the movable shade 23 includes a first shade portion 23a, a second shade portion 23b, a third shade portion 23c, and a fourth shade portion 23d. The movable shade 23 (23a to 23d) is integrally configured by, for example, injecting a material such as aluminum die casting into a mold, and cooling and solidifying the material.

The first shade portion 23a is a light blocking member that blocks a part of the light from the first light source 22a. The second shade portion 23a is, for example, an elongated plate-shaped light shielding member extending along a vertical plane orthogonal to the lamp optical axis AX, and in the vicinity of the front of the first light source 22a with the movable shade 23 supported as described above. It covers the lower part of the light emitting surface of the first light source 22a. The upper edge of the first shade portion 23a includes a Z-shaped step portion 23a1. Optical origin _{F 21a} of the first lens 21a is positioned at the upper end edge near the first shade portion 23a. The optical origin F _21a of the first lens 21a may be any upper edge near the first shade section 23a, for example, may be located at the long side near the first light source 22a.

The second shade portion 23b is an elongated plate-shaped light shielding member extending along a vertical plane orthogonal to the lamp optical axis AX, and is disposed near the front of the second light source 22b with the movable shade 23 supported as described above. Thus, the lower part of the light emitting surface of the second light source 22b is covered. The upper end edge of the second shade portion 23b extends horizontally. In addition, you may provide a Z-shaped level | step-difference part also in the upper end edge of the 2nd shade part 23b. Optical origin _{F 21b} of the second lens 21b is positioned at the upper end edge near the second shade section 23b. The optical origin F _21b of the second lens 21b may be any upper edge vicinity of the second shade section 23b, for example, may be located at the long side near the second light source 22b.

The third shade portion 23c is a light shielding member that shields part of the light from the third light source 12c. The third shade portion 23c is, for example, an elongated plate-shaped light shielding member extending along a vertical plane orthogonal to the lamp optical axis AX, and in the vicinity of the front of the third light source 22c in a state where the movable shade 23 is supported as described above. It covers the lower part of the light emitting surface of the third light source 22c. The upper end edge of the third shade portion 23c extends horizontally. In addition, you may provide a Z-shaped level | step-difference part also in the upper end edge of the 3rd shade part 23c. Optical origin _{F 21c} of the third lens 21c is positioned upper edge near the third shade portion 23c. The optical origin F _21c of the third lens 21c may be any upper edge near the third shade section 23b, for example, may be located at the long side near the third light source 22c.

The fourth shade portion 23d is a light blocking member that blocks part of the light from the fourth light source 22d. The fourth shade portion 23a is, for example, an elongated plate-shaped light shielding member extending along a vertical plane perpendicular to the lamp optical axis AX, and in the vicinity of the front of the fourth light source 22d with the movable shade 23 supported as described above. It covers the lower part of the light emitting surface of the fourth light source 22d. The upper end edge of the fourth shade portion 23d extends horizontally. In addition, you may provide a Z-shaped level | step-difference part also in the upper end edge of the 4th shade part 23d. Optical origin _{F 21d} of the fourth lens 21d is located on the upper end edge near the fourth shade portion 23d. The optical origin F _21d of the fourth lens 21d may be any upper edge vicinity of the fourth shade portion 23d, for example, may be located at the long side near the fourth light source 22d.

  Each shade part 23a-23c is connected by the connection part 23e extended in the diagonal direction, and comprises the one movable shade 23. As shown in FIG.

  The first lens 21a, the first light source 22a, and the movable shade 23 (first shade portion 23a) configured as described above constitute a first direct projection optical system 20A. According to the first direct projection optical system 20A, the light emitted from the first light source 22a is transmitted through the first lens 21a and irradiated forward as parallel light, and a virtual vertical screen (front of the vehicle) facing the front of the vehicle. The partial distribution light pattern P5 that irradiates the vicinity of the center of the light distribution pattern for the passing beam is formed (see FIG. 12).

  Since the first lens 21a can project a light source image having a longer focal length and a smaller focal length than the other lenses 21b to 21d, the partial light distribution pattern P5 has the highest condensed (spot-like) high illuminance. It becomes a pattern.

  Further, since the light source image of the light emitting surface of the first light source 22a whose lower part is covered with the first shade part 23a is reversely projected forward by the action of the first lens 21a, the partial light distribution pattern P5 is The pattern includes a cut-off line CL5 including a Z-shaped step portion defined by the upper edge of the first shade portion 23a at the upper edge.

The cut-off line CL5 is an oblique (for example, 45 °) cut-off line CL5 connecting the own lane side cut-off line CL5 _L extending in the horizontal direction, the opposite lane side cut-off line CL5 _R extending in the horizontal direction, and both cut-off lines CL5 _L and CL5 _{R. S} is included.

  The second lens 21b, the second light source 22b, and the movable shade 23 (second shade portion 23b) configured as described above constitute a second direct projection optical system 20B. According to the second direct projection optical system 20B, the light emitted from the second light source 22b is transmitted through the second lens 21b and diffused to the left and right sides in the horizontal section, and in the vertical section, Light is emitted forward as light deflected vertically downward, and is diffused in a horizontal direction and a vertical direction from the partial light distribution pattern P5 on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. A partial light distribution pattern P6 is formed (see FIG. 12).

  Since the second lens 21b has a shorter focal length than the first lens 21a, the partial light distribution pattern P6 is larger in the horizontal and vertical directions and has a lower illuminance than the partial light distribution pattern P5.

  In addition, since the light source image of the light emitting surface of the second light source 22b, the lower part of which is covered by the second shade portion 23a, is reversely projected forward by the action of the second lens 21b, the partial light distribution pattern P6 is The pattern includes a cut-off line CL6 extending in the horizontal direction defined by the upper edge of the second shade portion 23a at the upper edge.

  The third lens 21c, the third light source 22c, and the movable shade 23 (third shade portion 23c) configured as described above constitute a third direct projection optical system 20C. According to the third direct projection optical system 20C, the light emitted from the third light source 22c is transmitted through the third lens 21c and diffused to the left and right sides in the horizontal section, and in the vertical section, Light is emitted forward as light deflected vertically downward, and is diffused in a horizontal direction and a vertical direction from the partial distribution light pattern P6 on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. The partial light distribution pattern P7 is formed (see FIG. 12).

  Since the third lens 21c has a shorter focal length than the second lens 21b, the partial light distribution pattern P7 is a pattern that is larger in the horizontal and vertical directions and lower in illuminance than the partial light distribution pattern P6.

  In addition, since the light source image of the light emitting surface of the third light source 22c whose lower part is covered with the third shade portion 23a is reversely projected forward by the action of the third lens 21c, the partial light distribution pattern P7 is The upper end edge includes a cut-off line CL7 extending in the horizontal direction defined by the upper end edge of the third shade portion 23d.

  The fourth lens 21d, the fourth light source 22d, and the movable shade 23 (fourth shade portion 23d) configured as described above constitute a fourth direct projection optical system 20D. According to the fourth direct projection optical system 20D, the light emitted from the fourth light source 22d is transmitted through the fourth lens 21d and diffused to the left and right sides in the horizontal section, and in the vertical section, Light is emitted forward as light deflected vertically downward, and is diffused in a horizontal direction and a vertical direction from the partial light distribution pattern P7 on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. A partial light distribution pattern P8 is formed (see FIG. 12).

  Since the fourth lens 21d has a shorter focal length than the third lens 21c, the partial light distribution pattern P8 is a pattern that is larger in the horizontal and vertical directions and lower in illuminance than the partial light distribution pattern P7.

  In addition, since the light source image of the light emitting surface of the fourth light source 22d, the lower part of which is covered by the fourth shade portion 23a, is inverted and projected forward by the action of the fourth lens 21d, the partial light distribution pattern P8 is The pattern includes a cut-off line CL8 extending in the horizontal direction defined by the upper edge of the fourth shade portion 23d at the upper edge.

  Each of the partial light distribution patterns P5 to P8 is superimposed as shown in FIG. That is, the optical system 20A including the projection lens 21a having the longest focal length among the plurality of optical systems 20A to 20B forms the most condensed light distribution pattern P5, and the other optical systems 20B to 20D are the focal points of the projection lenses. As the distance becomes shorter, light distribution patterns P6 to P8 having a wider horizontal spread are formed. As a result, the center (partial distribution light pattern P5) has the highest illuminance, and as it moves toward the periphery, the horizontal spread increases and the illuminance decreases. Is formed.

  As shown in FIG. 9, the movable shade 23 (23a to 23d) adjusts the screwing amount of the vertical adjustment screw 25 so that the movable shade 23 (23a to 23d) is vertical in the vertical plane perpendicular to the lamp optical axis AX with the rotation shaft 24a as the center. It swings in the direction and is fixed to an arbitrary position after movement.

  The vertical adjustment screw 25 is a screw that rotates at the same position around the vertical axis, and is held by the housing 91. The vertical adjustment screw 25 is inserted into an opening 23f formed at the distal end portion of the movable shade 23 and screwed into a flange portion 29 fixed thereto. The vertical adjustment screw 25 is screwed into a relatively tight flange portion 29 (corresponding to the fixing means of the present invention) in order to fix the movable shade 23 to an arbitrary position after the movement.

  When the screwing amount of the vertical adjustment screw 25 to the movable shade 23 is adjusted, the movable shade 23 (23a to 23d) swings in the vertical direction around the rotation shaft 24a in a vertical plane orthogonal to the lamp optical axis AX. , Fixed to an arbitrary position after the movement.

  When the movable shade 23 is swung by a small angle θ in the vertical direction around the rotation axis 24a in a vertical plane perpendicular to the lamp optical axis AX, the vertical movement amount h1 of the movable shade 23 (23a to 23d). ˜h4 is represented by the following formula.

[Equation 3]
A vertical movement amount h1 = L1 × sin θ = 4 × L4 × sin θ of the portion of the first shade portion 23a corresponding to the first light source 22a (optical axis AX ₁ ).
The amount of vertical movement h2 = L2 × sin θ = 3 × L4 × sin θ of the portion of the second shade portion 23b corresponding to the second light source 22b (optical axis AX ₂ ).
The amount of vertical movement h3 = L3 × sin θ = 2 × L4 × sin θ of the portion of the third shade portion 23c corresponding to the third light source 22c (optical axis AX ₃ ).
A vertical movement amount h4 = L4 × sin θ of a portion corresponding to the fourth light source 22d (optical axis AX ₄ ) in the fourth shade portion 23d.
Here, the ratio of the optical axis change of the lens 21 (21a to 21d) is expressed by the following equation.

[Equation 4]
h1 / f1 = 4 × L4 × sin θ / (4 × f4) = L4 × sin θ / f4
h2 / f2 = 3 × L4 × sin θ / (3 × f4) = L4 × sin θ / f4
h3 / f3 = 2 × L4 × sin θ / (2 × f4) = L4 × sin θ / f4
h4 / f4 = L4 × sin θ / f4
As described above, the ratio of the distance from the rotation axis 24a of the movable shade 23 to the light sources 22a to 22d (the optical axis _AX 1 _{~AX 4)} is, for equal proportions of the focal length of the lens 21a to 21d (distance L1 : Distance L2: distance L3: distance L4 = focal length f1: focal length f2: focal length f3: focal length f4 = 4: 3: 2: 1), the movable shade 23 around the rotation axis 24a and the lamp optical axis Even if the micro-angle θ is swung in the vertical direction in the vertical plane orthogonal to AX, the rate of change of the optical axis of the lens 21 (21a to 21d) becomes equal (h1 = h2 = h3 = h4). That is, the moving directions and the moving amounts of the cut-off lines CL5 to CL8 of the light distribution patterns P5 to P8 on the virtual vertical screen are equal.

  Accordingly, the amount of screwing of the vertical adjustment screw 25 is adjusted, and the movable shade 23 (23a to 23d) is moved by swinging in the vertical direction around the rotation shaft 24a in the vertical plane perpendicular to the lamp optical axis AX. The optical axis can be adjusted by fixing to an arbitrary position later.

  Next, a comparative example will be described.

  The vehicle lamp unit (not shown) of this comparative example (conventional example) uses a fixed shade instead of the movable shade 23 and a vehicle lamp with a fulcrum as the center, as compared with the vehicle lamp unit 20. The difference is that the optical axis is adjusted by tilting the entire unit. Other than that, the configuration is the same as the vehicular lamp unit 20.

  When the entire vehicle lamp unit of the comparative example (optical axis direction dimension: 45 [mm]) is tilted about the fulcrum and the optical axis is adjusted (optical axis adjustment angle: 2.0 [deg]), the optical axis is adjusted. Before and after, the end part (the part farthest from the fulcrum) of the vehicle lamp unit of the comparative example moved 1.6 [mm] in the vertical direction (movement amount: 1.6 [mm]).

  On the other hand, in the vehicle lamp unit 20 of the present embodiment, the same angle optical axis adjustment as that in the comparative example was performed. However, f1 = 10 [mm], f2 = 7.5 [mm], f3 = 5.0 [mm], f4 = 2.5 [mm], L1 = 10 [mm], L2 = 75 [mm], L3 = 50 [mm], L4 = 25 [mm], and the length of the movable shade 23 in the longitudinal direction = 120 [mm]. In this case, the lens 21 (21a to 21d) does not move before and after the optical axis adjustment (movement amount: 0 [mm]), and the end of the movable shade 13 (the part farthest from the rotating shaft 24a) is in the vertical direction. Moved 0.42 [mm]. The rotation angle θ of the movable shade 23 was 0.2 [deg].

  As is clear from the comparative example, according to the present embodiment, the moving amount of the movable portion can be reduced as compared with the vehicle lamp unit of the comparative example (comparative example: 1.6 [mm], This embodiment: 0.42 [mm]). Therefore, according to the present embodiment, it is possible to save the moving space of the movable part.

  As described above, according to the present embodiment, unlike the conventional case in which the entire vehicle lamp unit is tilted to adjust the optical axis, the movable shade 23 is tilted without tilting the entire plurality of direct projection optical systems 20A to 20D. Only the optical axis can be swung to adjust the optical axis. Accordingly, it is possible to realize the vehicular lamp unit 20 in which the lens 21 (21a to 21d) does not move at all during the optical axis adjustment (movement amount: 0 [mm]) and does not affect the appearance at all.

  Further, according to the present embodiment, since the lens 21 (21a to 21d) does not move at all during the optical axis adjustment (movement amount: 0 [mm]), the movement of the projection lens of the vehicular lamp unit that has been conventionally required is performed. Spaces can be omitted.

  Further, according to the present embodiment, it is possible to simultaneously adjust the optical axes of the plurality of direct projection optical systems 20A to 20D by moving only one movable shade 23.

  Next, a modified example will be described.

  In the above embodiment, an example using the four direct projection optical systems 20A to 20D has been described, but the present invention is not limited to this. For example, the number of direct projection optical systems may be two to three or five or more.

[Third Embodiment]
Next, as a third embodiment of the present invention, a vehicular lamp unit 30 capable of simultaneously adjusting the optical axes of a plurality of projector optical systems 30A and 30B by swinging one movable shade 33 will be described. To do.

  The vehicle lamp unit 30 of the present embodiment is different from the vehicle lamp unit 20 of the second embodiment mainly in that a projector optical system is used. Hereinafter, the difference from the vehicular lamp unit 20 of the second embodiment will be mainly described.

  The vehicular lamp unit 30 of the present embodiment is a vehicular headlamp (head lamp), and is disposed on both the left and right sides of the front surface of a vehicle such as an automobile. The left and right vehicle lamp units 30 are symmetrical and have the same configuration. Hereinafter, the vehicle lamp unit 30 disposed on the left side will be mainly described.

13 is a perspective view of the vehicle lamp unit 30, FIG. 14 is an exploded perspective view, FIG. 15 is a front view, and FIG. 16 is a top view. FIG. 17 (a) vehicle lamp unit 30, cross-sectional view taken along a vertical cross section including the optical axis AX _1, FIG. 17 (b) vehicle lamp unit 30, cut by a vertical section including the optical axis AX ₂ FIG. FIG. 18 is an example of a combined light distribution pattern formed on the virtual vertical screen by the vehicle lamp unit 30.

  As shown in FIGS. 13 to 17, the vehicle lamp unit 30 includes a plurality of lenses 31a and 31b, a plurality of light sources 32a and 32b, a movable shade 33, a movable shade fixing screw 34, a vertical adjustment screw 35, a bracket 36, and a lens. A holder 37 and a plurality of reflecting surfaces 38a and 38b are provided. As shown in FIGS. 15 and 16, the vehicle lamp unit 30 is disposed in a lamp chamber 95 configured by combining a front lens 93 and a housing 94.

  As shown in FIG. 16, the lenses 31a and 31b are projection lenses having different focal lengths. The focal lengths of the lenses 31a and 31b satisfy the following expression.

[Equation 5]
Focal length f1 of the first lens 31a: Focal length f2 of the second lens 31b = 2: 1
The optical origins F _31a and F _31b on the rear side of the lenses 31a and 31b (corresponding to the rear focal point) are located in the same vertical plane orthogonal to the lamp optical axis AX. The lenses 31a and 31b are arranged at a predetermined interval in a diagonal direction with respect to the horizontal in a front view (see FIG. 15). The lenses 31 a and 31 b are fixed to a vehicle side such as a housing or a body frame via a bracket 36.

Hereinafter, the optical axes of the lenses 31a and 31b are referred to as AX ₁ and AX ₂ . The optical axes AX ₁ and AX ₂ are parallel to the lamp optical axis AX and extend in the vehicle front-rear direction, like the lamp optical axis AX.

As shown in FIGS. 14 to 16, the first lens 31 a is held on a lens holder 37 fixed to the bracket 36 with a screw, and is disposed on the optical axis AX ₁ . The first lens 31a is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface).

The second lens 31b is held by a lens holder 37 which is screwed to the bracket 36 is disposed on the optical axis AX _2. The second lens 31b is, for example, a projection lens having a convex surface on the vehicle front side (emission surface) and a flat surface on the vehicle rear side (incident surface).

  The lenses 31a and 31b are arranged so as to satisfy the following expression.

[Equation 6]
Distance from the rotation axis 34a of the movable shade 33 to the optical axis AX ₁ L1: distance from the rotation axis 34a of the movable shade 33 to the optical axis AX ₂ L2 = the focal length f1 of the first lens 31a: focal length of the second lens 31b f2 = 2: 1
Thus, the ratio of the distance from the rotating shaft 34a of the movable shade 33 to each of the light sources 32a and 32b (each of the optical axes AX ₁ and AX ₂ ) is equal to the ratio of the focal lengths of the lenses 31a and 31b.

  The light sources 32 a and 32 b are fixed to a vehicle side such as a housing or a body frame via a bracket 36.

The first light source 32a is a semiconductor light emitting element having a rectangular light emitting part (for example, a light source module such as an LED having a light emitting surface of 1 mm square × 4 rectangular light emitting parts), and is located behind the rear focal point F _31a of the first lens 31a. side and the optical axis AX ₁ near is fixed to the bracket 36 in a state that the light emitting surface upward (or obliquely rearward upward). The first light source 32a, the long sides are arranged symmetrically with respect to the optical axis perpendicular to the AX ₁ and the optical axis AX _1.

As shown in FIGS. 14 and 17B, the second light source 32b is a semiconductor light emitting element having a rectangular light emitting part (for example, a light source module such as an LED having a 1 mm square light emitting surface × 4 rectangular light emitting parts). The second lens 31b is fixed to the bracket 36 on the rear side of the rear focal point F _31b and in the vicinity of the optical axis AX ₂ with its light emitting surface facing upward (or obliquely rearwardly upward). The second light source 32b are arranged symmetrically its long side against the perpendicular to the optical axis AX ₂ and the optical axis AX _2.

  The heat generated by the light sources 32 a and 32 b is radiated from the radiation fins 36 b of the bracket 36. Since the bracket 36 is made of a material having excellent thermal conductivity such as an aluminum alloy, it is possible to efficiently dissipate heat. In addition, it is preferable to interpose heat conductive members such as heat conductive grease between the boards Ka and Kb on which the light sources 32a and 32b are mounted and the bracket 36. In this way, it is possible to further improve the heat dissipation performance.

  The light sources 32a and 32b may be any light source having a rectangular light emitting portion (rectangular light emitting surface), and the structure thereof is not particularly limited. For example, the light sources 32a and 32b may be light sources having a structure in which an LED element and a phosphor are combined, or may be light sources having a structure in which an LD element and a phosphor are combined.

  The first reflecting surface 38a and the second reflecting surface 38b are fixed to a vehicle side such as a housing or a body frame via a bracket 36.

The first reflecting surface 38a is configured so that light incident from the first light source 32a by transmitting the first lens 31a by focusing the optical axis AX ₁ side of the first lens 31a to form a predetermined light distribution pattern It is a reflective surface. Specifically, as shown in FIGS. 16 and 17A, the first reflecting surface 38a has a first focal point F1 _38a set in the vicinity of the first light source 32a and a second focal point F2 _38a as the first lens 31a. The light source of the first light source 32a is incident so that light emitted from the first light source 32a is incident on a spheroid reflection surface (spheroid surface or similar free-form surface) set near the rear focal point F _31a . It arrange | positions in the radiation | emission direction (above the 1st light source 32a). The first reflecting surface 38a is first from the side of the first light source 32a (the side of the rear side of the vehicle in FIG. 17A) so that light radiated substantially upward from the first light source 32a enters. It extends toward the lens 31a and covers the top of the first light source 32a.

The second reflective surface 38b is configured so that light incident from the second light source 32b by transmitting the second lens 31b and is focused on the optical axis AX ₂ side of the second lens 31b to form a predetermined light distribution pattern It is a reflective surface. Specifically, as shown in FIGS. 16 and 17B, the first reflecting surface 38b has a first focal point F1 _38b set in the vicinity of the second light source 32b, and a second focal point F2 _38b as the second lens 31b. The second light source 32b is arranged so that light emitted from the second light source 32b is incident on a spheroid reflection surface (spheroid surface or similar free-form surface) set near the rear focal point F _31b . It arrange | positions in the radiation | emission direction (above the 2nd light source 32b). The second reflecting surface 38b is second from the side of the second light source 32b (the side of the rear side of the vehicle in FIG. 17B) so that light radiated substantially upward from the second light source 32b enters. It extends toward the lens 31b and covers the second light source 32b.

  As shown in FIGS. 14 and 15, the movable shade 33 is an elongated light shielding member extending in a direction orthogonal to the lamp optical axis AX.

  The movable shade 33 can swing in the vertical direction with respect to the lenses 31a and 31b in the vertical plane perpendicular to the lamp optical axis AX (along the vertical plane) around the base end portion (rotating shaft 34a). It is supported by.

  In the present embodiment, the movable shade 33 is supported by the movable shade fixing screw 34 as follows (corresponding to the support means of the present invention).

  As shown in FIG. 14, the shaft portion 34 a of the movable shade fixing screw 34 fixed to the bracket 36 is inserted into the opening 33 g formed in the proximal end portion of the movable shade 33. As a result, the movable shade 33 can swing in the vertical direction around a shaft portion 34a (rotating shaft 34a) in a vertical plane orthogonal to the lamp optical axis AX. A shaft portion 34a (rotating shaft 34a) of the movable shade fixing screw 34 is parallel to the lamp optical axis AX and extends in the vehicle front-rear direction, like the lamp optical axis AX.

  As shown in FIGS. 14 and 15, the movable shade 33 includes a first shade portion 33a and a second shade portion 33b. The movable shade 33 (33a to 33d) is integrally configured by, for example, injecting a material such as aluminum die casting into a mold, and cooling and solidifying the material.

The first shade portion 33a is arranged in the light shielding member for shielding a part of light from the first light source 32a, the vicinity of the back focal point F _31a of the first lens 31a in a state where the movable shade 33 is supported as described above (See FIG. 17A). Side focal point _{F 31a} of the first lens 31a is positioned at the upper end edge near the first shade portion 33a. The upper edge of the first shade portion 33a includes a Z-shaped step portion 33a1 (see FIG. 14).

The second shade portion 33b is a light blocking member that blocks a part of the light from the second light source 32b, and is disposed in the vicinity of the rear focal point F _31b of the second lens 31b with the movable shade 33 supported as described above. (See FIG. 17B). Side focal point _{F 31b} after the second lens 31b is positioned at the upper end edge near the second shade section 33b. The upper edge of the second shade portion 33b includes a Z-shaped step portion 33b1 (see FIG. 14).

  The shade portions 33 a and 33 b are connected to constitute one movable shade 33.

The first lens 31a, the first light source 32a, the first reflecting surface 38a, and the movable shade 33 (first shade portion 33a) configured as described above constitute a first projector optical system 30A. According to the first projector optical system 30A, the light emitted from the first light source 32a is reflected by the first reflecting surface 38a and condensed near the rear focal point F _31a of the first lens 31a, and then the first lens. Partially distributed light that irradiates the vicinity of the center of the light distribution pattern for the passing beam on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) that is irradiated forward through 31a and directly facing the front of the vehicle A pattern P9 is formed (see FIG. 18).

  Since the first lens 31a can project a smaller light source image with a longer focal length than the second lens 31b, the partial light distribution pattern P9 is the most concentrated (spot-like) high-illuminance pattern. Become.

  Further, since part of the light from the first light source 32a is shielded by the first shade portion 33a, the partial light distribution pattern P9 includes a Z-shaped step portion defined by the upper edge of the first shade portion 33a. The pattern includes the cut-off line CL9 at the upper edge.

This cut-off line CL9 is a lane-side cut-off line CL9 _L extending in the horizontal direction, an opposite lane-side cut-off line CL9 _R extending in the horizontal direction, and an oblique (for example, 45 °) cut-off line CL9 connecting both cut-off lines CL9 _L and CL9 _{R. S} is included.

The second lens 31b, the second light source 32b, the second reflecting surface 38b, and the movable shade 33 (second shade portion 33b) configured as described above constitute a second projector optical system 30B. According to the second projector optical system 30B, the light emitted from the second light source 32b is reflected by the second reflecting surface 38b and condensed near the rear focal point F _31b of the second lens 31b, and then the second lens. Part diffused in a horizontal direction and a vertical direction from the partial light distribution pattern P9 on a virtual vertical screen (disposed approximately 25m forward from the front of the vehicle) that is transmitted forward through 31b and directly facing the front of the vehicle A distribution light pattern P10 is formed (see FIG. 18).

  Since the second lens 31b has a shorter focal length than the first lens 31a, the partial light distribution pattern P10 is larger in the horizontal and vertical directions and has a lower illuminance than the partial light distribution pattern P9.

  Further, since a part of the light from the second light source 32b is shielded by the second shade portion 33b, the partial light distribution pattern P10 includes a Z-shaped step portion defined by the upper edge of the second shade portion 33b. The pattern includes the cut-off line CL10 at the upper edge.

This cut-off line CL10 includes a cut-off line CL10 that connects the own lane-side cut-off line CL10 _L that extends in the horizontal direction, an opposite lane-side cut-off line CL10 _R that extends in the horizontal direction, and both the cut-off lines CL10 _L and CL10 _{R. S} is included.

  The respective part-distributed light patterns P9 and P10 are superimposed as shown in FIG. That is, among the plurality of optical systems 30A and 30B, the optical system 30A including the projection lens 31a having the longest focal length forms the most concentrated light distribution pattern P9, and the other optical systems 30B have a wide horizontal spread. A light distribution pattern P10 is formed. As a result, the center (partial light distribution pattern P9) has the highest illuminance, and as it goes to the periphery, the horizontal spread increases and the illuminance decreases. Is formed.

  As shown in FIG. 15, the movable shade 33 (33a, 33b) adjusts the screwing amount of the vertical adjustment screw 35 so that the movable shade 33 (33a, 33b) is vertical in a vertical plane perpendicular to the lamp optical axis AX with the rotation shaft 34a as the center. It swings in the direction and is fixed to an arbitrary position after movement.

  The vertical adjustment screw 35 is a screw that rotates at the same position around the vertical axis, and is held by the housing 94. The vertical adjustment screw 35 is screwed into a flange portion 39 that is inserted into an opening 33 f formed at the distal end portion of the movable shade 33 and fixed thereto. The vertical adjustment screw 35 is screwed into a relatively tight flange portion 39 (corresponding to the fixing means of the present invention) in order to fix the movable shade 33 to an arbitrary position after the movement.

  When the screwing amount of the vertical adjustment screw 35 to the movable shade 33 is adjusted, the movable shade 33 (33a, 33b) swings in the vertical direction around the rotation shaft 34a in a vertical plane perpendicular to the lamp optical axis AX. , Fixed to an arbitrary position after the movement.

  When the movable shade 33 is swung in the vertical direction by a small angle θ around the rotation axis 34a in the vertical plane orthogonal to the lamp optical axis AX, the vertical movement amount h1 of the movable shade 33 (33a, 33b). , H2 is represented by the following equation.

[Equation 7]
Vertical movement of the portion corresponding to the optical axis AX ₁ of the first shade portion 33a h1 = L1 × sinθ = 2 × L2 × sinθ
Vertical movement of the portion corresponding to the optical axis AX ₂ of the second shade section 33b h2 = L2 × sinθ
Here, the ratio of the optical axis change of the lenses 31a and 31b is expressed by the following equation.

[Equation 8]
h1 / f1 = 2 × L2 × sin θ / (2 × f2) = L2 × sin θ / f2
h2 / f2 = L2 × sin θ / f2
As described above, the ratio of the distance from the rotation axis 34a of the movable shade 33 to each of the light sources 22a and 22b (respective optical axes AX ₁ and AX ₂ ) is equal to the ratio of the focal lengths of the lenses 31a and 31b (distance L1). : Distance L2 = focal length f1: focal length f2 = 2: 1), and the movable shade 33 is swung in the vertical direction by a small angle θ around the rotation axis 34a in the vertical plane perpendicular to the lamp optical axis AX. In addition, the ratios of the optical axis changes of the lenses 31a and 31b are equal (h1 = h2). That is, the movement direction and the movement amount of each cut-off line CL9, CL10 of each light distribution pattern P9, P10 on the virtual vertical screen become equal.

  Accordingly, the amount of screwing of the vertical adjustment screw 35 is adjusted, and the movable shade 33 (33a, 33b) is moved by swinging in the vertical direction around the rotation axis 34a in the vertical plane orthogonal to the lamp optical axis AX. The optical axis can be adjusted by fixing to an arbitrary position later.

  Next, a comparative example will be described.

  The vehicle lamp unit (not shown) of this comparative example (conventional example) uses a fixed shade instead of the movable shade 33 and a vehicle lamp with a fulcrum as the center, as compared with the vehicle lamp unit 30. The difference is that the optical axis is adjusted by tilting the entire unit. Other than that, it is the structure similar to the vehicle lamp unit 30. FIG.

  When the entire vehicle lamp unit of the comparative example (optical axis direction dimension: 105 [mm]) is tilted about the fulcrum and the optical axis is adjusted (optical axis adjustment angle: 2.0 [deg]), the optical axis is adjusted. Before and after, the end part of the vehicle lamp unit (part farthest from the fulcrum) of the comparative example moved 3.7 [mm] in the vertical direction (movement amount: 3.7 [mm]).

  On the other hand, in the vehicle lamp unit 30 of the present embodiment, the same angle optical axis adjustment as that in the comparative example was performed. However, f1 = 30 [mm], f2 = 15 [mm], L1 = 100 [mm], L2 = 50 [mm], and the longitudinal length of the movable shade 33 = 125 [mm]. In this case, the lenses 31a and 31b do not move before and after the optical axis adjustment (amount of movement: 0 [mm]), and the end of the movable shade 33 (the portion farthest from the rotation shaft 34a) becomes 0. It moved 44 [mm]. The rotation angle θ of the movable shade 33 was 0.2 [deg].

  As is clear from the comparative example, according to the present embodiment, it is possible to reduce the amount of movement of the movable part as compared with the vehicle lamp unit of the comparative example (comparative example: 3.7 [mm], This embodiment: 0.44 [mm]). Therefore, according to the present embodiment, it is possible to save the moving space of the movable part.

  As described above, according to the present embodiment, unlike the conventional case in which the entire vehicle lamp unit is tilted to adjust the optical axis, only the movable shade 33 is tilted without tilting the entire projector optical systems 30A and 30B. It is possible to adjust the optical axis by swinging. Accordingly, it is possible to realize the vehicular lamp unit 30 in which the lenses 31a and 31b do not move at all during the optical axis adjustment (movement amount: 0 [mm]) and do not affect the appearance at all.

  Further, according to the present embodiment, since the lenses 31a and 31b do not move at all when adjusting the optical axis (movement amount: 0 [mm]), the space for moving the projection lens of the vehicular lamp unit that has been conventionally required is omitted. It becomes possible to do.

  Further, according to the present embodiment, it is possible to simultaneously adjust the optical axes of the plurality of projector optical systems 30A and 30B simply by moving one movable shade 33.

  Next, a modified example will be described.

  In the above embodiment, the example using the two projector optical systems 30A and 30B has been described, but the present invention is not limited to this. For example, there may be three or more projector optical systems.

  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.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp unit, 10A-10D ... Direct projection optical system, 11 (11a-11d) ... Lens (1st-4th lens), 12 (12a-12d) ... Light source (1st-4th light source), 13 (13a to 13d): movable shade (first to fourth shade portions), 14: guide member, 14a: horizontal portion, 14b: vertical portion, 14c: guide hole, 14d: guide groove, 15: guide fixing screw, DESCRIPTION OF SYMBOLS 16 ... Vertical adjustment screw, 17 ... Left-right adjustment screw, 18 ... Bracket, 18a ... Front surface, 18b ... Radiation fin, 19 ... Lens holder, 20 ... Vehicle lamp unit, 20A-20D ... Direct projection optical system, 21 (21a- 21d) ... lenses (first to fourth lenses), 22 (22a to 22d) ... light sources (first to fourth light sources), 23 (23a to 23d) ... movable shells (First to fourth shade portions), 23e ... connecting portion, 23f ... opening, 23g ... opening, 24 ... movable shade fixing screw, 24a ... rotating shaft, 25 ... up / down adjustment screw, 26 ... bracket, 26a ... front surface, 26b ... radiating fin, 27 ... lens holder, 29 ... flange, 30 ... vehicle lamp unit, 30A-30B ... projector optical system, 31 (31a, 31b) ... lens (first and second lenses), 32 (32a) 32b) ... light sources (first and second light sources), 33 (33a, 33b) ... movable shades (first and second shade portions), 33f ... openings, 33g ... openings, 34 ... movable shade fixing screws, 34a ... Rotating shaft, 35 ... Vertical adjustment screw, 36 ... Bracket, 36b ... Radiating fin, 37 ... Lens holder, 38a ... First reflecting surface, 38b ... Second reflecting surface, 39 ... Flange

Claims (6)

A projection lens, a light source disposed at or near a reference point of the projection lens, and emitting light for transmitting the projection lens to form a predetermined light distribution pattern, a reference point of the projection lens or the vicinity thereof A plurality of optical systems comprising: a shade portion that is disposed at a position closer to the projection lens than the light source and shields a part of light from the light source;
A movable shade including a shade portion of each of the plurality of optical systems;
Support means for supporting the movable shade so as to be movable in a vertical direction and / or a horizontal direction in a vertical plane orthogonal to the lamp optical axis with respect to the projection lenses of the plurality of optical systems;
Fixing means for fixing the movable shade to an arbitrary position after movement;
With
The projection lens and the light source of each of the plurality of optical systems are fixed to the vehicle side,
The vehicular lamp unit according to claim 1, wherein the projection lens of each of the plurality of optical systems has the same distance between the reference point and the projection lens. A projection lens, a light source disposed at or near a reference point of the projection lens, and emitting light for transmitting the projection lens to form a predetermined light distribution pattern, a reference point of the projection lens or the vicinity thereof A plurality of optical systems comprising: a shade portion that is disposed at a position closer to the projection lens than the light source and shields a part of light from the light source;
A movable shade including a shade portion of each of the plurality of optical systems;
A support means for supporting the movable shade so as to be swingable about a rotation axis extending in a direction parallel to the optical axis of the lamp with respect to each projection lens of the plurality of optical systems;
Fixing means for fixing the movable shade to an arbitrary position after movement,
The projection lens and the light source of each of the plurality of optical systems are fixed to the vehicle side,
A vehicle lamp characterized in that a ratio of a distance from the rotation axis to an optical axis of each of the plurality of optical systems is equal to a ratio of a distance between a reference point of the projection lens and the projection lens of each of the plurality of optical systems. unit.   Among the plurality of optical systems, the optical system including the projection lens having the longest distance between the reference point and the projection lens forms the most condensed light distribution pattern, and the other optical systems are the projection lens reference point and the projection lens. The vehicular lamp unit according to claim 2, wherein a light distribution pattern having a wide horizontal spread is formed as the distance to the vehicle becomes shorter. The projection lens, the light source, and the projection lens arranged in the radiation direction of the light source so that light emitted from the light source is incident, and condensing the light incident from the light source near the optical axis of the projection lens And a reflecting surface configured to form a predetermined light distribution pattern, and a reference point of the projection lens or the vicinity thereof and a position closer to the projection lens than the light source. A plurality of optical systems including a shade portion that partially shields light;
A movable shade including a shade portion of each of the plurality of optical systems;
Support means for supporting the movable shade so as to be swingable about a rotation axis extending in a direction parallel to a lamp optical axis with respect to the projection lens of each of the plurality of optical systems;
Fixing means for fixing the movable shade to an arbitrary position after movement,
The projection lens, the light source and the reflecting surface of each of the plurality of optical systems are fixed to the vehicle side,
A vehicle lamp characterized in that a ratio of a distance from the rotation axis to an optical axis of each of the plurality of optical systems is equal to a ratio of a distance between a reference point of the projection lens and the projection lens of each of the plurality of optical systems. unit.   Among the plurality of optical systems, the optical system including the projection lens having the longest distance between the reference point and the projection lens forms the most condensed light distribution pattern, and the other optical systems are the projection lens reference point and the projection lens. The vehicle lamp unit according to claim 4, wherein a light distribution pattern having a wide spread in the horizontal direction is formed as the distance to the vehicle decreases.   A vehicular lamp using the vehicular lamp unit according to any one of claims 1 to 5.

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