WO2019176595A1 - Vehicle head light - Google Patents

Vehicle head light Download PDF

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Publication number
WO2019176595A1
WO2019176595A1 PCT/JP2019/008191 JP2019008191W WO2019176595A1 WO 2019176595 A1 WO2019176595 A1 WO 2019176595A1 JP 2019008191 W JP2019008191 W JP 2019008191W WO 2019176595 A1 WO2019176595 A1 WO 2019176595A1
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WO
WIPO (PCT)
Prior art keywords
light source
light
optical axis
vehicle headlamp
control unit
Prior art date
Application number
PCT/JP2019/008191
Other languages
French (fr)
Japanese (ja)
Inventor
陽介 大橋
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to JP2020506398A priority Critical patent/JPWO2019176595A1/en
Publication of WO2019176595A1 publication Critical patent/WO2019176595A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/39—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources

Definitions

  • the present invention relates to a technical field relating to a vehicle headlamp including an optical conversion element capable of controlling the direction of light emitted from a light source.
  • Some vehicle headlamps have an optical conversion element arranged in the interior space of a lamp casing formed by a cover and a lamp housing, and the direction of light is controlled by the optical conversion element.
  • the optical conversion element for example, a mirror element or a liquid crystal element is used.
  • the mirror element for example, MEMS (Micro Electro Mechanical Systems) and DMD (Digital Micromirror Device) are used (for example, see Patent Document 1).
  • a heat sink is provided in the optical unit on which the light source and the optical conversion element are mounted, and the heat dissipating fins of the heat sink are arranged to protrude outside the lamp housing, The heat radiation amount to the outside is increased to reduce the influence of heat on the optical conversion element.
  • an object of the present invention is to facilitate the adjustment of the tilt of the optical axis while ensuring high heat dissipation during driving of the light source.
  • a vehicle headlamp includes a lamp outer casing formed by a lamp housing having an opening and a cover that closes the opening, a light source, and a heat sink to which heat generated when the light source is driven is transmitted. And a light control unit having an optical conversion element capable of controlling at least the direction of light emitted from the light source, wherein the heat sink is fixed to the lamp outer casing and at least part of the lamp is It is located outside the outer casing.
  • the heat generated when the light source is driven is released to the outside of the lamp housing, and the optical axis is adjusted without moving the heat sink.
  • an optical axis adjustment screw is provided that adjusts the direction of the light control unit and is supported by the lamp housing, and changes the direction of the light control unit to change the inclination of the optical axis. It is desirable to make adjustments.
  • the optical axis adjusting screw is connected to the light control unit.
  • the optical axis tilt is adjusted by the optical conversion element.
  • the light control unit is provided with a heat radiating member that transmits heat generated when the light source is driven.
  • the optical conversion element is preferably a mirror element.
  • heat generated when the light source is driven is released to the outside of the lamp outer casing, and the optical axis is adjusted without moving the heat sink, so that high heat dissipation is ensured when the light source is driven. It is possible to smoothly adjust the inclination of the optical axis.
  • FIG. 2 to 4 show an embodiment of the present invention, which is a schematic longitudinal sectional view of a vehicle headlamp according to a first embodiment. It is a schematic longitudinal cross-sectional view of the vehicle headlamp of 2nd Embodiment. It is a schematic longitudinal cross-sectional view of the vehicle headlamp of 3rd Embodiment. It is a schematic longitudinal cross-sectional view of the vehicle headlamp of 4th Embodiment.
  • the vehicle headlamp 1 according to the first embodiment will be described (see FIG. 1).
  • the vehicle headlamp 1 includes a lamp housing 2 that opens forward and a cover 3 that closes the opening of the lamp housing 2.
  • the lamp housing 2 and the cover 3 constitute a lamp outer casing 4, and the inner space of the lamp outer casing 4 is formed as a lamp chamber 5.
  • a mounting hole 2a penetrating in the vertical direction is formed at the lower end of the lamp housing 2.
  • screw holes 2b and 2b penetrating in the front-rear direction are formed.
  • a lens unit 6, a fixed body 7, and a control body 8 are arranged in the lamp chamber 5.
  • the lens unit 6 has a lens holder 9 and a projection lens 10 attached to the front end of the lens holder 9.
  • the lens holder 9 is formed in a cylindrical shape penetrating front and rear.
  • the lens holder 9 is fixed to the control body 8 by connecting the rear end portion to the control body 8.
  • a transmission hole 9 a penetrating in the vertical direction is formed at the lower end of the lens holder 9.
  • the outer periphery of the projection lens 10 is attached to the lens holder 9 and is held by the lens holder 9.
  • the fixed body 7 is located below the lens unit 6.
  • the fixed body 7 has a light source unit 11, a heat sink 12, and a reflector 13.
  • the light source unit 11 includes a circuit board 14 and a light source 15 mounted on the upper surface of the circuit board 14.
  • a light source 15 for example, a light emitting diode (LED: Light Emitting Diode) is used.
  • the heat sink 12 is made of, for example, a material having high heat dissipation such as metal, and has a disposition portion 12a formed in a substantially flat shape facing upward and downward, and heat dissipating fins 12b, 12b protruding downward from the disposition portion 12a,. ⁇ Has The heat sink 12 is fixed to the lamp outer casing 4 with the arrangement portion 12a fitted in the attachment hole 2a.
  • the light source unit 11 is arranged on the upper surface of the arrangement part 12a.
  • the radiation fins 12b, 12b,... Are formed in a strip shape, for example, and are positioned outside the lamp outer casing 4.
  • the reflector 13 is formed in a bowl shape opened rearward and downward, and the inner surface is formed as a reflective surface 13a.
  • the reflector 13 is arranged on the upper surface of the arrangement part 12 a and is located in front of the light source unit 11.
  • the control body 8 is located behind the lens unit 6.
  • the control body 8 includes a heat radiating member 16 and a light control unit 17.
  • the heat radiating member 16 is formed of, for example, a material having high heat radiating properties such as metal and is provided as a heat sink.
  • the heat dissipating member 16 has a disposition portion 16a formed in a substantially flat shape facing in the front-rear direction and heat dissipating fins 16b, 16b,... Protruding rearward from the disposition portion 16a.
  • Bearing holes 16c, 16c, and 16c that are opened rearward are formed at the rear end of the heat dissipating member 16.
  • the light control unit 17 is arranged on the front surface of the arrangement part 16 a in the heat radiating material 16.
  • the light control unit 17 has a reflecting portion 18 and a control board 19.
  • a rear end portion of the lens holder 9 is attached to the outer peripheral portion of the light control unit 17.
  • the reflector 18 is positioned so as to face the projection lens 10.
  • the reflecting portion 18 is formed by arranging a plurality of mirror elements 20, 20,... In a matrix, for example.
  • the mirror element 20 is used as an example of an optical conversion element.
  • MEMS Micro Electro Mechanical Systems
  • DMD Digital Micromirror Device
  • Each mirror element 20 is provided with a minute reflecting surface, and by controlling each reflecting surface, highly accurate light distribution control can be performed.
  • the control board 19 is disposed around the reflecting portion 18.
  • the control board 19 is electrically connected to the reflector 18 and controls the driving state of the mirror elements 20, 20,... When the light source 15 is driven (lighted).
  • the rear end of the control body 8 is connected with optical axis adjusting screws 21 and 21 and a pivot shaft (not shown).
  • the optical axis adjusting screws 21 and 21 have a function of performing initial adjustment (aiming adjustment) of the optical axis.
  • the optical axis adjusting screws 21 and 21 are made of a material with high heat dissipation such as metal, for example.
  • the optical axis adjusting screws 21 and 21 are supported in a state where they are screwed into the screw holes 2 b and 2 b and penetrated through the lamp housing 2.
  • the optical axis adjusting screws 21 and 21 are provided as connecting portions 21a and 21a having spherical front ends, and the connecting portions 21a and 21a are inserted into the bearing holes 16c and 16c, respectively, and connected to the heat dissipation member 16.
  • the control body 8 is rotatable in any direction with the connecting portions 21a and 21a of the optical axis adjusting screws 21 and 21 as fulcrums.
  • the pivot shaft protrudes forward from the rear surface of the lamp housing 2.
  • the pivot shaft has a front end as a spherical portion.
  • the spherical portion of the pivot shaft is inserted into the bearing hole 16 c of the heat radiating member 16. Therefore, the control body 8 can be rotated in any direction with the spherical portion of the pivot shaft as a fulcrum.
  • the control body 8 is integrated with the lens unit 6 and tilted in the left-right direction with respect to the lamp housing 2 with the spherical portion of the pivot shaft and the connecting portion 21a of the other optical axis adjusting screw 21 as fulcrums.
  • the control body 8 is integrated with the lens unit 6 and tilted in the vertical direction with respect to the lamp housing 2 with the spherical portion of the pivot shaft and the connecting portion 21a of one optical axis adjusting screw 21 as fulcrums.
  • the control body 8 when the control body 8 is tilted in the left-right direction or the up-down direction, the direction of the light control unit 17 is changed, and the tilt of the optical axis of the light traveling from the reflection unit 18 toward the projection lens 10 is adjusted. Therefore, the inclination of the optical axis can be adjusted easily and precisely by using the optical axis adjusting screws 21 and 21.
  • the emitted light L is reflected by the reflecting surface 13a of the reflector 13 and passes through the transmission hole 9a, and the reflecting portion 18 is reflected. Is incident on.
  • the reflection direction of the light L incident on the reflection unit 18 is controlled by the mirror elements 20, 20,..., Is transmitted through the projection lens 10 and the cover 3, and is irradiated forward.
  • a predetermined light distribution pattern according to the control of the mirror elements 20, 20,... Is formed by the light transmitted through the projection lens 10 and the cover 3.
  • the heat sink 12 is fixed and at least a part is positioned outside the lamp outer casing 4, and heat generated by the light control unit 17 when the light source 15 is driven is outside the lamp outer casing 4. And the optical axis is adjusted without moving the heat sink 12. Therefore, it is possible to smoothly adjust the inclination of the optical axis while ensuring high heat dissipation during driving of the light source 15.
  • the optical axis adjusting screws 21 and 21 are connected to the light control unit 17 via the heat radiating member 16, the heat generated by the light control unit 17 when the light source 15 is driven is converted to the optical axis adjusting screws 21 and 21. Can be transmitted to the outside of the lamp outer casing 4. Therefore, it is possible to efficiently suppress the temperature rise of the light control unit 17 and to ensure a good operating state of the mirror elements 20, 20,.
  • the vehicle headlamp 1A according to the second embodiment has optical axis adjusting screws 21 and 21 and a pivot shaft and screw holes 2b and 2b in the lamp housing 2 and heat radiation as compared with the vehicle headlamp 1. Since only the bearing hole 16c of the member 16 is not different, the configuration similar to the first embodiment in the second embodiment is the same as the vehicle headlamp 1 in the first embodiment. The same reference numerals as those used for the same parts are attached and the description thereof is omitted or simplified.
  • a lens unit 6 and a control body 8 are fixed to the lamp housing 2 by a frame (not shown).
  • the initial adjustment (aiming adjustment) of the optical axis is performed by the mirror elements 20, 20,.
  • the aiming adjustment is performed, for example, by detecting the traveling direction of the light A emitted from the light source 15 and controlled by the control element 8 by the mirror elements 20, 20,... Based on the detection result, the mirror elements 20, 20,. This is done by adjusting the control state of (1) to a control state in which the orientation of the spindle is in an appropriate direction.
  • the tilt adjustment of the optical axis is performed by the mirror elements 20, 20,... There is no need to provide it. Therefore, the number of parts can be reduced.
  • the vehicle headlamp 1A since there is no optical axis adjusting screw partially positioned outside the lamp outer casing 4, the vehicle headlamp 1A can be miniaturized and the structure can be simplified.
  • the vehicle headlamp 1B according to the third embodiment has an attachment hole 2a formed at the upper end portion instead of the lower end portion of the lamp housing 2, as compared with the vehicle headlamp 1. Since the mounting directions of the fixed body 7 and the control body 8 with respect to the lamp housing 2 are different from each other only in that the reflecting plate 22 is used in place of the lens unit 6, the first embodiment is different from the first embodiment.
  • subjected to the part similar to the vehicle headlamp 1 in 1st Embodiment is attached
  • the fixed body 7 is fixed to the lamp outer casing 4 in a state where the arrangement portion 12a of the heat sink 12 is fitted in the mounting hole 2a.
  • the heat radiating fins 12b, 12b,... Of the heat sink 12 protrude upward from the arrangement portion 12a and are located outside the lamp outer casing 4.
  • the light control unit 11 and the reflector 13 are arranged on the lower surface of the arrangement part 12 a, and the reflector 13 is positioned in front of the light control unit 11.
  • the control body 8 is located below the fixed body 7.
  • the control body 8 is arranged so that the arrangement portion 16a of the heat radiation member 16 faces in the vertical direction, and the heat radiation fins 16b, 16b, ... are projected downward from the arrangement portion 16a.
  • the light control unit 17 is arranged on the upper surface of the arrangement part 16a.
  • the reflection plate 22 is formed in a bowl shape opened forward and downward, and the inner surface is formed as a reflection surface 22a.
  • the reflection plate 22 is located on the upper surface of the arrangement portion 16 a and is located behind the reflection portion 18 of the light control unit 17.
  • the initial adjustment (aiming) of the optical axis is performed by the rotation of the optical axis adjustment screws 21 and 21, as in the vehicle lamp 1 in the first embodiment.
  • the emitted light B is reflected by the reflecting surface 13a of the reflector 13 and enters the reflecting portion 18.
  • the reflection direction of the light B incident on the reflection unit 18 is controlled by the mirror elements 20, 20,..., Reflected by the reflection surface 22 a of the reflection plate 22, transmitted through the cover 3, and irradiated forward.
  • a predetermined light distribution pattern according to the control of the mirror elements 20, 20,... Is formed by the light transmitted through the cover 3.
  • the vehicle headlamp 1C according to the fourth embodiment has an optical axis adjusting screw 21, 21, a pivot shaft, screw holes 2b, 2b in the lamp housing 2, and heat radiation compared to the vehicle headlamp 1B. Since the only difference is that the member 16 does not have the bearing hole 16c, the configuration similar to the second embodiment in the third embodiment is the same as the vehicle headlamp 1B in the second embodiment.
  • the same reference numerals as those used for the same parts are attached and the description thereof is omitted or simplified.
  • a lens unit 6 and a control body 8 are fixed to the lamp housing 2 by a frame (not shown).
  • the initial adjustment (aiming adjustment) of the optical axis is performed by the mirror elements 20, 20,... As in the vehicle headlamp 1A in the second embodiment.
  • the emitted light C is reflected by the reflection surface 13a of the reflector 13 and is incident on the reflection unit 18.
  • the reflection direction of the light C incident on the reflection unit 18 is controlled by the mirror elements 20, 20,..., Reflected by the reflection surface 22 a of the reflection plate 22, transmitted through the cover 3, and irradiated forward.
  • a predetermined light distribution pattern according to the control of the mirror elements 20, 20,... Is formed by the light transmitted through the cover 3.
  • the vehicle headlamp 1 ⁇ / b> C configured as described above, since the optical axis inclination is adjusted by the mirror elements 20, 20,... Of the reflecting portion 18, it is necessary to provide another member for adjusting the optical axis. There is no. Therefore, the number of parts can be reduced. In addition, since there is no optical axis adjusting screw partially positioned outside the lamp outer casing 4, the vehicle headlamp 1C can be reduced in size and the structure can be simplified.
  • the vehicle headlamp 1C the light C whose reflection direction is controlled by the mirror elements 20, 20,... Therefore, no projection lens for collimating the light in front of the control body 8 is positioned, so that the size of the vehicle headlamp 1C can be reduced in the front-rear direction.
  • the fixed body 7 is arranged below or above the control body 8.
  • the arrangement of the fixed body 7 is not limited to the above example. ).
  • the control body 8 has the heat radiating member 16 and the light control unit 17, and the light control unit 17 is arranged in the arrangement portion 16 a of the heat radiating member 16.
  • the control body 8 may not have the heat radiating member 16. Thereby, since the heat radiating member 16 is not located behind or below the light control unit 17, the vehicle headlamp 1, the vehicle headlamp 1A, the vehicle headlamp 1B, and the vehicle headlamp 1C are downsized. Can be achieved.
  • the lamp chamber 5 may be provided with a shade that blocks a part of the light emitted from the light source 15. By providing the shade, light emitted from the light source 15 and not incident on the reflection portion 18 can be shielded, and a more precise light distribution pattern can be formed by the mirror elements 20, 20,. .
  • an optical conversion element is not restricted to a mirror element.
  • the optical conversion element for example, a liquid crystal element may be used.
  • SYMBOLS 1 Vehicle headlamp, 2 ... Lamp housing, 3 ... Cover, 4 ... Lamp housing, 7 ... Fixed body, 8 ... Control body, 11 ... Light source unit, 12 ... Heat sink, 12b ... Radiation fin, 15 ... Light source , 16 ... Radiating member, 17 ... Light control unit, 20 ... Mirror element (optical conversion element), 21 ... Optical axis adjusting screw

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

In the present invention, adjustment of the inclination of an optical axis is smoothly performed while high heat dissipation performance is ensured during driving of a light source. This vehicle head light is provided with: a lighting-tool outer casing (4) formed of a lamp housing (2) having an opening and a cover (3) for closing the opening; a light source unit (11) including a light source (15) and a heat sink (12) to which heat generated during driving of the light source is transmitted; and a light control unit (17) having a mirror element (20) capable of controlling at least the direction of light emitted from the light source. The heat sink is fixed to the lighting-tool outer casing, and at least a portion thereof is positioned outside the lighting-tool outer casing.

Description

車輌用前照灯Vehicle headlamp
　本発明は、光源から出射された光の方向を制御することが可能な光学変換素子を備えた車輌用前照灯についての技術分野に関する。 The present invention relates to a technical field relating to a vehicle headlamp including an optical conversion element capable of controlling the direction of light emitted from a light source.
　車輌用前照灯には、カバーとランプハウジングによって構成された灯具外筐の内部空間に光学変換素子が配置され、光学変換素子によって光の方向が制御されるものがある。光学変換素子としては、例えば、ミラー素子や液晶素子が用いられる。ミラー素子としては、例えば、ＭＥＭＳ（Micro Electro Mechanical Systems）やＤＭＤ（Digital Micromirror Device）が用いられる（例えば、特許文献１参照）。 Some vehicle headlamps have an optical conversion element arranged in the interior space of a lamp casing formed by a cover and a lamp housing, and the direction of light is controlled by the optical conversion element. As the optical conversion element, for example, a mirror element or a liquid crystal element is used. As the mirror element, for example, MEMS (Micro Electro Mechanical Systems) and DMD (Digital Micromirror Device) are used (for example, see Patent Document 1).
　上記のような車輌用前照灯においては、光源の駆動時に光源から熱が発生し、灯具外筐の内部空間の温度が上昇するが、光学変換素子に対する熱の影響が大きいと、光学変換素子の良好な動作状態が阻害される虞がある。 In the vehicle headlamp as described above, heat is generated from the light source when the light source is driven, and the temperature of the internal space of the lamp outer casing rises. However, if the influence of heat on the optical conversion element is large, the optical conversion element There is a risk that the good operating state of the device will be hindered.
　そこで、特許文献１に記載された車輌用前照灯においては、光源と光学変換素子が搭載された光学ユニットにヒートシンクを設け、ヒートシンクの放熱フィンを灯具外筐の外部に突出させて配置し、外部への放熱量を高めて光学変換素子に対する熱の影響を低下させる構成にされている。 Therefore, in the vehicle headlamp described in Patent Document 1, a heat sink is provided in the optical unit on which the light source and the optical conversion element are mounted, and the heat dissipating fins of the heat sink are arranged to protrude outside the lamp housing, The heat radiation amount to the outside is increased to reduce the influence of heat on the optical conversion element.
特開２０１６－９１９７６号公報Japanese Unexamined Patent Publication No. 2016-91976
　しかしながら、このような構成にあっては、光軸の傾き調整を行う際に光源とともにヒートシンクが傾動され、ヒートシンクと灯具外筐が干渉する可能性があり、光軸の傾き調整（エイミング調整）に支障を来たす虞があった。 However, in such a configuration, when adjusting the tilt of the optical axis, the heat sink is tilted together with the light source, and there is a possibility that the heat sink and the outer casing of the lamp interfere with each other. There was a risk of hindrance.
　そこで、本発明は、光源の駆動時における高い放熱性を確保した上で光軸の傾き調整の円滑化を図ることを目的とする。 Accordingly, an object of the present invention is to facilitate the adjustment of the tilt of the optical axis while ensuring high heat dissipation during driving of the light source.
　本発明に係る車輌用前照灯は、開口を有するランプハウジングと前記開口を閉塞するカバーとによって構成された灯具外筐と、光源と前記光源の駆動時に発生する熱が伝達されるヒートシンクとを有する光源ユニットと、少なくとも前記光源から出射された光の方向を制御することが可能な光学変換素子を有する光制御ユニットとを備え、前記ヒートシンクは前記灯具外筐に固定され少なくとも一部が前記灯具外筐の外側に位置されたものである。 A vehicle headlamp according to the present invention includes a lamp outer casing formed by a lamp housing having an opening and a cover that closes the opening, a light source, and a heat sink to which heat generated when the light source is driven is transmitted. And a light control unit having an optical conversion element capable of controlling at least the direction of light emitted from the light source, wherein the heat sink is fixed to the lamp outer casing and at least part of the lamp is It is located outside the outer casing.
　これにより、光源の駆動時に発生する熱が灯具外筐の外側に放出されると共に、ヒートシンクを動かすことなく光軸の調整が行われる。 Thus, the heat generated when the light source is driven is released to the outside of the lamp housing, and the optical axis is adjusted without moving the heat sink.
　上記した車輌用前照灯においては、前記光制御ユニットの向きを調整し前記ランプハウジングに支持された光軸調整スクリューが設けられ、前記光制御ユニットの向きが変化されることにより光軸の傾き調整が行われることが望ましい。 In the vehicle headlamp described above, an optical axis adjustment screw is provided that adjusts the direction of the light control unit and is supported by the lamp housing, and changes the direction of the light control unit to change the inclination of the optical axis. It is desirable to make adjustments.
　これにより、光軸調整スクリューの回転に応じて光学変換素子の向きが変化される。 This changes the direction of the optical conversion element according to the rotation of the optical axis adjusting screw.
　上記した車輌用前照灯においては、前記光制御ユニットに前記光軸調整スクリューが連結されていることが望ましい。 In the vehicle headlamp described above, it is desirable that the optical axis adjusting screw is connected to the light control unit.
　これにより、光源の駆動時に発生した熱を光軸調整スクリューに伝達させて放出することが可能になる。 This makes it possible to transmit the heat generated when the light source is driven to the optical axis adjusting screw and release it.
　上記した車輌用前照灯においては、前記光学変換素子によって光軸の傾き調整が行われることが望ましい。 In the vehicle headlamp described above, it is preferable that the optical axis tilt is adjusted by the optical conversion element.
　これにより、光学変換素子の動作によって光軸の傾き調整が行われるため、光軸調整を行う別部材を設ける必要がない。 Thereby, since the optical axis inclination is adjusted by the operation of the optical conversion element, it is not necessary to provide a separate member for adjusting the optical axis.
　上記した車輌用前照灯においては、前記光制御ユニットに前記光源の駆動時に発生した熱が伝達される放熱部材が設けられていることが望ましい。 In the vehicle headlamp described above, it is desirable that the light control unit is provided with a heat radiating member that transmits heat generated when the light source is driven.
　これにより、光制御ユニットで発生した熱が放熱部材に伝達されて放出される。 This causes heat generated in the light control unit to be transferred to the heat dissipation member and released.
　上記した車輌用前照灯においては、前記光学変換素子はミラー素子であることが望ましい。 In the above vehicle headlamp, the optical conversion element is preferably a mirror element.
　これにより、ミラー素子によって少なくとも光源から出射された光の方向を制御することが可能にされる。 Thereby, at least the direction of the light emitted from the light source can be controlled by the mirror element.
　本発明によれば、光源の駆動時に発生する熱が灯具外筐の外側に放出されると共に、ヒートシンクを動かすことなく光軸の調整が行われるため、光源の駆動時における高い放熱性を確保した上で光軸の傾き調整の円滑化を図ることができる。 According to the present invention, heat generated when the light source is driven is released to the outside of the lamp outer casing, and the optical axis is adjusted without moving the heat sink, so that high heat dissipation is ensured when the light source is driven. It is possible to smoothly adjust the inclination of the optical axis.
図２乃至図４と共に本発明の実施の形態を示すものであり、本図は第１の実施の形態の車輌用前照灯の概略縦断面図である。2 to 4 show an embodiment of the present invention, which is a schematic longitudinal sectional view of a vehicle headlamp according to a first embodiment. 第２の実施の形態の車輌用前照灯の概略縦断面図である。It is a schematic longitudinal cross-sectional view of the vehicle headlamp of 2nd Embodiment. 第３の実施の形態の車輌用前照灯の概略縦断面図である。It is a schematic longitudinal cross-sectional view of the vehicle headlamp of 3rd Embodiment. 第４の実施の形態の車輌用前照灯の概略縦断面図である。It is a schematic longitudinal cross-sectional view of the vehicle headlamp of 4th Embodiment.
　以下に、本発明車輌用前照灯を実施するための形態について添付図面を参照して説明する。 Hereinafter, embodiments for carrying out the vehicle headlamp of the present invention will be described with reference to the accompanying drawings.
　先ず、第１の実施の形態に係る車輌用前照灯１について説明する（図１参照）。 First, the vehicle headlamp 1 according to the first embodiment will be described (see FIG. 1).
　車輌用前照灯１は、前方に開口されたランプハウジング２とランプハウジング２の開口を閉塞するカバー３とを備えている。ランプハウジング２とカバー３によって灯具外筐４が構成され、灯具外筐４の内部空間は灯室５として形成されている。 The vehicle headlamp 1 includes a lamp housing 2 that opens forward and a cover 3 that closes the opening of the lamp housing 2. The lamp housing 2 and the cover 3 constitute a lamp outer casing 4, and the inner space of the lamp outer casing 4 is formed as a lamp chamber 5.
　ランプハウジング２の下端部には上下方向に貫通された取付孔２ａが形成されている。ランプハウジング２の後端部には前後方向に貫通された螺孔２ｂ、２ｂが形成されている。 A mounting hole 2a penetrating in the vertical direction is formed at the lower end of the lamp housing 2. At the rear end of the lamp housing 2, screw holes 2b and 2b penetrating in the front-rear direction are formed.
　灯室５には、レンズユニット６と固定体７と制御体８が配置されている。 In the lamp chamber 5, a lens unit 6, a fixed body 7, and a control body 8 are arranged.
　レンズユニット６は、レンズホルダー９とレンズホルダー９の前端に取り付けられた投影レンズ１０とを有している。 The lens unit 6 has a lens holder 9 and a projection lens 10 attached to the front end of the lens holder 9.
　レンズホルダー９は前後に貫通された筒状に形成されている。レンズホルダー９は、後端部が制御体８に連結されることで制御体８に固定されている。レンズホルダー９の下端部には上下方向に貫通された透過孔９ａが形成されている。 The lens holder 9 is formed in a cylindrical shape penetrating front and rear. The lens holder 9 is fixed to the control body 8 by connecting the rear end portion to the control body 8. A transmission hole 9 a penetrating in the vertical direction is formed at the lower end of the lens holder 9.
　投影レンズ１０は外周部がレンズホルダー９に取り付けられてレンズホルダー９に保持されている。 The outer periphery of the projection lens 10 is attached to the lens holder 9 and is held by the lens holder 9.
　固定体７はレンズユニット６の下方に位置されている。固定体７は光源ユニット１１とヒートシンク１２とリフレクター１３を有している。 The fixed body 7 is located below the lens unit 6. The fixed body 7 has a light source unit 11, a heat sink 12, and a reflector 13.
　光源ユニット１１は、回路基板１４と回路基板１４の上面に搭載された光源１５とを有している。光源１５としては、例えば、発光ダイオード（ＬＥＤ：Light Emitting Diode）が用いられている。 The light source unit 11 includes a circuit board 14 and a light source 15 mounted on the upper surface of the circuit board 14. As the light source 15, for example, a light emitting diode (LED: Light Emitting Diode) is used.
　ヒートシンク１２は、例えば、金属などの放熱性の高い材料によって形成され、上下方向を向く略平板状に形成された配置部１２ａと配置部１２ａから下方へ突出された放熱フィン１２ｂ、１２ｂ、・・・とを有している。ヒートシンク１２は、配置部１２ａが取付孔２ａに嵌め込まれた状態で灯具外筐４に固定されている。配置部１２ａの上面には、光源ユニット１１が配置されている。放熱フィン１２ｂ、１２ｂ、・・・は、例えば、短冊状に形成され灯具外筐４の外側に位置されている。 The heat sink 12 is made of, for example, a material having high heat dissipation such as metal, and has a disposition portion 12a formed in a substantially flat shape facing upward and downward, and heat dissipating fins 12b, 12b protruding downward from the disposition portion 12a,.・ Has The heat sink 12 is fixed to the lamp outer casing 4 with the arrangement portion 12a fitted in the attachment hole 2a. The light source unit 11 is arranged on the upper surface of the arrangement part 12a. The radiation fins 12b, 12b,... Are formed in a strip shape, for example, and are positioned outside the lamp outer casing 4.
　リフレクター１３は、後方及び下方に開口された椀状に形成され、内面が反射面１３ａとして形成されている。リフレクター１３は配置部１２ａの上面に配置され、光源ユニット１１より前方に位置されている。 The reflector 13 is formed in a bowl shape opened rearward and downward, and the inner surface is formed as a reflective surface 13a. The reflector 13 is arranged on the upper surface of the arrangement part 12 a and is located in front of the light source unit 11.
　制御体８はレンズユニット６の後方に位置されている。制御体８は放熱部材１６と光制御ユニット１７を有している。 The control body 8 is located behind the lens unit 6. The control body 8 includes a heat radiating member 16 and a light control unit 17.
　放熱部材１６は、例えば、金属などの放熱性の高い材料によって形成され、ヒートシンクとして設けられている。放熱部材１６は、前後方向を向く略平板状に形成された配置部１６ａと配置部１６ａから後方へ突出された放熱フィン１６ｂ、１６ｂ、・・・とを有している。放熱部材１６の後端部には後方に開口された軸受穴１６ｃ、１６ｃ、１６ｃが形成されている。 The heat radiating member 16 is formed of, for example, a material having high heat radiating properties such as metal and is provided as a heat sink. The heat dissipating member 16 has a disposition portion 16a formed in a substantially flat shape facing in the front-rear direction and heat dissipating fins 16b, 16b,... Protruding rearward from the disposition portion 16a. Bearing holes 16c, 16c, and 16c that are opened rearward are formed at the rear end of the heat dissipating member 16.
　光制御ユニット１７は放熱材１６における配置部１６ａの前面に配置されている。光制御ユニット１７は反射部１８と制御基板１９を有している。光制御ユニット１７の外周部にはレンズホルダー９の後端部が取り付けられている。 The light control unit 17 is arranged on the front surface of the arrangement part 16 a in the heat radiating material 16. The light control unit 17 has a reflecting portion 18 and a control board 19. A rear end portion of the lens holder 9 is attached to the outer peripheral portion of the light control unit 17.
　反射部１８は投影レンズ１０に対向するように位置されている。反射部１８は、複数のミラー素子２０、２０、・・・が、例えば、マトリックス状に配列されて形成されている。ミラー素子２０は、光学変換素子の一例として用いられている。ミラー素子２０としては、例えば、ＭＥＭＳ（Micro Electro Mechanical Systems）やＤＭＤ（Digital Micromirror Device）が用いられる。各ミラー素子２０には微小な反射面が設けられており、それぞれの反射面を制御することで、高精度の配光制御を行うことができる。例えば、反射面における光の反射方向を制御することで、所望の配光パターンの形成や光軸の傾き調整を行うことができるほか、反射面の駆動状態のオンオフを制御することによって、部分点灯と全体点灯の切替や部分点灯における点灯位置の切替を行い所望の配光パターンを形成することができる。 The reflector 18 is positioned so as to face the projection lens 10. The reflecting portion 18 is formed by arranging a plurality of mirror elements 20, 20,... In a matrix, for example. The mirror element 20 is used as an example of an optical conversion element. As the mirror element 20, for example, MEMS (Micro Electro Mechanical Systems) or DMD (Digital Micromirror Device) is used. Each mirror element 20 is provided with a minute reflecting surface, and by controlling each reflecting surface, highly accurate light distribution control can be performed. For example, by controlling the direction of light reflection on the reflecting surface, it is possible to form a desired light distribution pattern and adjust the tilt of the optical axis, and to turn on and off the driving state of the reflecting surface to control partial lighting Thus, it is possible to form a desired light distribution pattern by switching the whole lighting or the lighting position in partial lighting.
　制御基板１９は反射部１８の周囲に配置されている。制御基板１９は反射部１８と電気的に接続され、光源１５の駆動時（点灯時）にミラー素子２０、２０、・・・の駆動状態を制御する。 The control board 19 is disposed around the reflecting portion 18. The control board 19 is electrically connected to the reflector 18 and controls the driving state of the mirror elements 20, 20,... When the light source 15 is driven (lighted).
　制御体８の後端部には光軸調整スクリュー２１、２１と図示しないピボット軸が連結されている。光軸調整スクリュー２１、２１は、光軸の初期調整（エイミング調整）を行う機能を有している。 The rear end of the control body 8 is connected with optical axis adjusting screws 21 and 21 and a pivot shaft (not shown). The optical axis adjusting screws 21 and 21 have a function of performing initial adjustment (aiming adjustment) of the optical axis.
　光軸調整スクリュー２１、２１は、例えば、金属などの放熱性の高い材料で形成されている。光軸調整スクリュー２１、２１は螺孔２ｂ、２ｂに螺合されてランプハウジング２に貫通された状態で支持されている。光軸調整スクリュー２１、２１は、例えば、前端部が球状の連結部２１ａ、２１ａとして設けられ、連結部２１ａ、２１ａがそれぞれ軸受孔１６ｃ、１６ｃに挿入されて放熱部材１６に連結されている。制御体８は光軸調整スクリュー２１、２１の連結部２１ａ、２１ａを支点として任意の方向へ回動可能にされている。 The optical axis adjusting screws 21 and 21 are made of a material with high heat dissipation such as metal, for example. The optical axis adjusting screws 21 and 21 are supported in a state where they are screwed into the screw holes 2 b and 2 b and penetrated through the lamp housing 2. For example, the optical axis adjusting screws 21 and 21 are provided as connecting portions 21a and 21a having spherical front ends, and the connecting portions 21a and 21a are inserted into the bearing holes 16c and 16c, respectively, and connected to the heat dissipation member 16. The control body 8 is rotatable in any direction with the connecting portions 21a and 21a of the optical axis adjusting screws 21 and 21 as fulcrums.
　ピボット軸はランプハウジング２の後面部から前方に突出されている。ピボット軸は前端部が球状部として設けられている。ピボット軸の球状部は放熱部材１６の軸受穴１６ｃに挿入されている。従って、制御体８はピボット軸の球状部を支点としても任意の方向へ回転可能にされている。 The pivot shaft protrudes forward from the rear surface of the lamp housing 2. The pivot shaft has a front end as a spherical portion. The spherical portion of the pivot shaft is inserted into the bearing hole 16 c of the heat radiating member 16. Therefore, the control body 8 can be rotated in any direction with the spherical portion of the pivot shaft as a fulcrum.
　一方の光軸調整スクリュー２１が軸回り方向へ回転されると、光軸調整スクリュー２１の螺孔２ｂに対する螺合位置が変化され、光軸調整スクリュー２１が回転方向に応じて軸方向へ移動され、制御体８がレンズユニット６と一体になってピボット軸の球状部と他方の光軸調整スクリュー２１の連結部２１ａとを支点としてランプハウジング２に対して左右方向へ傾動される。他方の光軸調整スクリュー２１が軸回り方向へ回転されると、光軸調整スクリュー２１の螺孔２ｂに対する螺合位置が変化され、光軸調整スクリュー２１が回転方向に応じて軸方向へ移動され、制御体８がレンズユニット６と一体になってピボット軸の球状部と一方の光軸調整スクリュー２１の連結部２１ａとを支点としてランプハウジング２に対して上下方向に傾動される。 When one optical axis adjusting screw 21 is rotated in the direction around the axis, the screwing position of the optical axis adjusting screw 21 with respect to the screw hole 2b is changed, and the optical axis adjusting screw 21 is moved in the axial direction according to the rotation direction. The control body 8 is integrated with the lens unit 6 and tilted in the left-right direction with respect to the lamp housing 2 with the spherical portion of the pivot shaft and the connecting portion 21a of the other optical axis adjusting screw 21 as fulcrums. When the other optical axis adjusting screw 21 is rotated in the direction around the axis, the screwing position of the optical axis adjusting screw 21 with respect to the screw hole 2b is changed, and the optical axis adjusting screw 21 is moved in the axial direction according to the rotation direction. The control body 8 is integrated with the lens unit 6 and tilted in the vertical direction with respect to the lamp housing 2 with the spherical portion of the pivot shaft and the connecting portion 21a of one optical axis adjusting screw 21 as fulcrums.
　このように制御体８が左右方向又は上下方向へ傾動されることにより、光制御ユニット１７の向きが変化され反射部１８から投影レンズ１０へ向かう光の光軸の傾きが調整される。従って、光軸調整スクリュー２１、２１を用いることによって、容易且つ精密に光軸の傾き調整を行うことができる。 As described above, when the control body 8 is tilted in the left-right direction or the up-down direction, the direction of the light control unit 17 is changed, and the tilt of the optical axis of the light traveling from the reflection unit 18 toward the projection lens 10 is adjusted. Therefore, the inclination of the optical axis can be adjusted easily and precisely by using the optical axis adjusting screws 21 and 21.
　上記のように構成された車輌用前照灯１において光源１５から光が出射されると、出射された光Ｌはリフレクター１３の反射面１３ａで反射されて透過孔９ａを透過し、反射部１８に入射される。反射部１８に入射された光Ｌはミラー素子２０、２０、・・・によって反射方向が制御され、投影レンズ１０及びカバー３を透過されて前方へ向けて照射される。投影レンズ１０及びカバー３を透過された光によって、ミラー素子２０、２０、・・・の制御に応じた所定の配光パターンが形成される。 When light is emitted from the light source 15 in the vehicle headlamp 1 configured as described above, the emitted light L is reflected by the reflecting surface 13a of the reflector 13 and passes through the transmission hole 9a, and the reflecting portion 18 is reflected. Is incident on. The reflection direction of the light L incident on the reflection unit 18 is controlled by the mirror elements 20, 20,..., Is transmitted through the projection lens 10 and the cover 3, and is irradiated forward. A predetermined light distribution pattern according to the control of the mirror elements 20, 20,... Is formed by the light transmitted through the projection lens 10 and the cover 3.
　光源１５の駆動時には、固定体７において光源１５及び回路基板１４から熱が発生する。発生した熱はヒートシンク１２に伝達され、放熱フィン１２ｂ、１２ｂ、・・・から灯具外筐４の外側へ放出される。これにより、光源ユニット１１の温度上昇が抑制される。 When the light source 15 is driven, heat is generated from the light source 15 and the circuit board 14 in the fixed body 7. The generated heat is transmitted to the heat sink 12 and released to the outside of the lamp outer casing 4 from the radiation fins 12b, 12b,. Thereby, the temperature rise of the light source unit 11 is suppressed.
　車輌用前照灯１においては、ヒートシンク１２が固定され少なくとも一部が灯具外筐４の外側に位置されており、光源１５の駆動時に光制御ユニット１７で発生する熱が灯具外筐４の外側に放出されると共に、ヒートシンク１２を動かすことなく光軸の調整が行われる。従って、光源１５の駆動時における高い放熱性を確保した上で光軸の傾き調整の円滑化を図ることができる。 In the vehicle headlamp 1, the heat sink 12 is fixed and at least a part is positioned outside the lamp outer casing 4, and heat generated by the light control unit 17 when the light source 15 is driven is outside the lamp outer casing 4. And the optical axis is adjusted without moving the heat sink 12. Therefore, it is possible to smoothly adjust the inclination of the optical axis while ensuring high heat dissipation during driving of the light source 15.
　また、光源１５の駆動時には、制御体８の光制御ユニット１７で発生した熱が放熱部材１６に伝達されて放熱フィン１６ｂ、１６ｂ、・・・から放出される。これにより、光制御ユニット１７の温度上昇が抑制されてミラー素子２０、２０、・・・の良好な動作状態を確保することができる。 Further, when the light source 15 is driven, heat generated by the light control unit 17 of the control body 8 is transmitted to the heat radiating member 16 and released from the heat radiating fins 16b, 16b,. Thereby, the temperature rise of the light control unit 17 is suppressed, and the favorable operation state of the mirror elements 20, 20,.
　さらに、光制御ユニット１７には、放熱部材１６を介して光軸調整スクリュー２１、２１が連結されているため、光源１５の駆動時に光制御ユニット１７で発生した熱を光軸調整スクリュー２１、２１に伝達させて灯具外筐４の外部に放出することが可能となる。従って、光制御ユニット１７の温度上昇を効率的に抑制してミラー素子２０、２０、・・・の良好な動作状態を確保することができる。 Furthermore, since the optical axis adjusting screws 21 and 21 are connected to the light control unit 17 via the heat radiating member 16, the heat generated by the light control unit 17 when the light source 15 is driven is converted to the optical axis adjusting screws 21 and 21. Can be transmitted to the outside of the lamp outer casing 4. Therefore, it is possible to efficiently suppress the temperature rise of the light control unit 17 and to ensure a good operating state of the mirror elements 20, 20,.
　次に、第２の実施の形態に係る車輌用前照灯１Ａについて説明する（図２参照）。 Next, a vehicle headlamp 1A according to a second embodiment will be described (see FIG. 2).
　なお、第２の実施の形態に係る車輌用前照灯１Ａは、車輌用前照灯１と比較して光軸調整スクリュー２１、２１とピボット軸とランプハウジング２における螺孔２ｂ、２ｂと放熱部材１６の軸受穴１６ｃとを有さないことのみが相違するため、第２の実施の形態において第１の実施の形態と同様の構成については第１の実施の形態における車輌用前照灯１と同様の部分に付した記号と同じ符号を付して説明は省略又は簡略化する。 The vehicle headlamp 1A according to the second embodiment has optical axis adjusting screws 21 and 21 and a pivot shaft and screw holes 2b and 2b in the lamp housing 2 and heat radiation as compared with the vehicle headlamp 1. Since only the bearing hole 16c of the member 16 is not different, the configuration similar to the first embodiment in the second embodiment is the same as the vehicle headlamp 1 in the first embodiment. The same reference numerals as those used for the same parts are attached and the description thereof is omitted or simplified.
　車輌用前照灯１Ａは、例えば、図示しないフレームによってレンズユニット６と制御体８がランプハウジング２に対して固定されている。 In the vehicle headlamp 1A, for example, a lens unit 6 and a control body 8 are fixed to the lamp housing 2 by a frame (not shown).
　車輌用前照灯１Ａにおいて、光軸の初期調整（エイミング調整）はミラー素子２０、２０、・・・によって行われる。エイミング調整は、例えば、光源１５から出射され、ミラー素子２０、２０、・・・によって制御体８が制御される光Ａの進行方向が検出され　検出結果に基づいてミラー素子２０、２０、・・・の制御状態が調整され、主軸の向きが適正な向きとなる制御状態にされることにより行われる。 In the vehicle headlamp 1A, the initial adjustment (aiming adjustment) of the optical axis is performed by the mirror elements 20, 20,. The aiming adjustment is performed, for example, by detecting the traveling direction of the light A emitted from the light source 15 and controlled by the control element 8 by the mirror elements 20, 20,... Based on the detection result, the mirror elements 20, 20,. This is done by adjusting the control state of (1) to a control state in which the orientation of the spindle is in an appropriate direction.
　上記のように構成された車輌用前照灯１Ａにおいては、反射部１８のミラー素子２０、２０、・・・によって光軸の傾き調整が行われるため、光軸調整を行うための別部材を設ける必要がない。従って、部品点数を削減することができる。また、灯具外筐４の外側に一部が位置された光軸調整スクリューを有さないため、車輌用前照灯１Ａの小型化が図られるほか、構造を簡素化することができる。 In the vehicle headlamp 1A configured as described above, the tilt adjustment of the optical axis is performed by the mirror elements 20, 20,... There is no need to provide it. Therefore, the number of parts can be reduced. In addition, since there is no optical axis adjusting screw partially positioned outside the lamp outer casing 4, the vehicle headlamp 1A can be miniaturized and the structure can be simplified.
　次に、第３の実施の形態に係る車輌用前照灯１Ｂについて説明する（図３参照）。 Next, a vehicle headlamp 1B according to a third embodiment will be described (see FIG. 3).
　尚、第３の実施の形態に係る車輌用前照灯１Ｂは、車輌用前照灯１と比較して取付孔２ａがランプハウジング２の下端部の代わりに上端部に形成されていること、固定体７と制御体８のランプハウジング２に対する取付向きがそれぞれ異なること、レンズユニット６の代わりに反射板２２が用いられていることのみが相違するため、第３の実施の形態において第１の実施の形態と同様の構成については第１の実施の形態における車輌用前照灯１と同様の部分に付した記号と同じ符号を付して説明は省略又は簡略化する。 The vehicle headlamp 1B according to the third embodiment has an attachment hole 2a formed at the upper end portion instead of the lower end portion of the lamp housing 2, as compared with the vehicle headlamp 1. Since the mounting directions of the fixed body 7 and the control body 8 with respect to the lamp housing 2 are different from each other only in that the reflecting plate 22 is used in place of the lens unit 6, the first embodiment is different from the first embodiment. About the structure similar to embodiment, the code | symbol same as the code | symbol attached | subjected to the part similar to the vehicle headlamp 1 in 1st Embodiment is attached | subjected, and description is abbreviate | omitted or simplified.
　固定体７は、ヒートシンク１２の配置部１２ａが取付孔２ａに嵌め込まれた状態で灯具外筐４に固定されている。ヒートシンク１２の放熱フィン１２ｂ、１２ｂ、・・・は配置部１２ａから上方に突出され、灯具外筐４の外側に位置されている。光制御ユニット１１とリフレクター１３は配置部１２ａの下面に配置され、リフレクター１３は光制御ユニット１１より前方に位置されている。 The fixed body 7 is fixed to the lamp outer casing 4 in a state where the arrangement portion 12a of the heat sink 12 is fitted in the mounting hole 2a. The heat radiating fins 12b, 12b,... Of the heat sink 12 protrude upward from the arrangement portion 12a and are located outside the lamp outer casing 4. The light control unit 11 and the reflector 13 are arranged on the lower surface of the arrangement part 12 a, and the reflector 13 is positioned in front of the light control unit 11.
　制御体８は固定体７の下方に位置されている。制御体８は放熱部材１６の配置部１６ａが上下方向を向くように配置され、放熱フィン１６ｂ、１６ｂ、・・・が配置部１６ａから下方に突出されている。光制御ユニット１７は配置部１６ａの上面に配置されている。 The control body 8 is located below the fixed body 7. The control body 8 is arranged so that the arrangement portion 16a of the heat radiation member 16 faces in the vertical direction, and the heat radiation fins 16b, 16b, ... are projected downward from the arrangement portion 16a. The light control unit 17 is arranged on the upper surface of the arrangement part 16a.
　反射板２２は前方及び下方に開口された椀状に形成され、内面が反射面２２ａとして形成されている。反射板２２は配置部１６ａの上面に位置され、光制御ユニット１７の反射部１８より後方に位置されている。 The reflection plate 22 is formed in a bowl shape opened forward and downward, and the inner surface is formed as a reflection surface 22a. The reflection plate 22 is located on the upper surface of the arrangement portion 16 a and is located behind the reflection portion 18 of the light control unit 17.
　車輌用前照灯１Ｂにおいては、光軸の初期調整（エイミング）が第１の実施の形態における車輌用灯具１と同様に、光軸調整スクリュー２１、２１の回転によって行われる。 In the vehicle headlamp 1B, the initial adjustment (aiming) of the optical axis is performed by the rotation of the optical axis adjustment screws 21 and 21, as in the vehicle lamp 1 in the first embodiment.
　上記のように構成された車輌用前照灯１Ｂにおいて光源ユニット１１の光源１５から光が出射されると、出射された光Ｂはリフレクター１３の反射面１３ａで反射されて反射部１８に入射される。反射部１８に入射された光Ｂはミラー素子２０、２０、・・・によって反射方向が制御され、反射板２２の反射面２２ａで反射されカバー３を透過されて前方へ向けて照射される。カバー３を透過された光によって、ミラー素子２０、２０、・・・の制御に応じた所定の配光パターンが形成される。 When light is emitted from the light source 15 of the light source unit 11 in the vehicle headlamp 1B configured as described above, the emitted light B is reflected by the reflecting surface 13a of the reflector 13 and enters the reflecting portion 18. The The reflection direction of the light B incident on the reflection unit 18 is controlled by the mirror elements 20, 20,..., Reflected by the reflection surface 22 a of the reflection plate 22, transmitted through the cover 3, and irradiated forward. A predetermined light distribution pattern according to the control of the mirror elements 20, 20,... Is formed by the light transmitted through the cover 3.
　車輌用前照灯１Ｂにおいては、ミラー素子２０、２０、・・・によって反射方向が制御された光Ｂが反射板２２によって平行光とされる。従って、制御体８の前方に光を平行光にするための投影レンズが位置されないため、車輌用前照灯１Ｂの前後方向における小型化を図ることができる。 In the vehicle headlamp 1B, the light B whose reflection direction is controlled by the mirror elements 20, 20,... Therefore, since the projection lens for making the light parallel is not positioned in front of the control body 8, it is possible to reduce the size of the vehicle headlamp 1B in the front-rear direction.
　次に、第４の実施の形態に係る車輌用前照灯１Ｃについて説明する（図４参照）。 Next, a vehicle headlamp 1C according to a fourth embodiment will be described (see FIG. 4).
　尚、第４の実施の形態に係る車輌用前照灯１Ｃは、車輌用前照灯１Ｂと比較して光軸調整スクリュー２１、２１とピボット軸とランプハウジング２の螺孔２ｂ、２ｂと放熱部材１６の軸受穴１６ｃとを有さないことのみが相違するため、第３の実施の形態において第２の実施の形態と同様の構成については第２の実施の形態における車輌用前照灯１Ｂと同様の部分に付した記号と同じ符号を付して説明は省略又は簡略化する。 In addition, the vehicle headlamp 1C according to the fourth embodiment has an optical axis adjusting screw 21, 21, a pivot shaft, screw holes 2b, 2b in the lamp housing 2, and heat radiation compared to the vehicle headlamp 1B. Since the only difference is that the member 16 does not have the bearing hole 16c, the configuration similar to the second embodiment in the third embodiment is the same as the vehicle headlamp 1B in the second embodiment. The same reference numerals as those used for the same parts are attached and the description thereof is omitted or simplified.
　車輌用前照灯１Ｃは、例えば、図示しないフレームによってレンズユニット６と制御体８がランプハウジング２に対して固定されている。 In the vehicle headlamp 1C, for example, a lens unit 6 and a control body 8 are fixed to the lamp housing 2 by a frame (not shown).
　車輌用前照灯１Ｃにおいては、光軸の初期調整（エイミング調整）が第２の実施の形態における車輌用前照灯１Ａと同様、ミラー素子２０、２０、・・・によって行われる。 In the vehicle headlamp 1C, the initial adjustment (aiming adjustment) of the optical axis is performed by the mirror elements 20, 20,... As in the vehicle headlamp 1A in the second embodiment.
　上記のように構成された車輌用前照灯１Ｃにおいて光源ユニット１１の光源１５から光が出射されると、出射された光Ｃはリフレクター１３の反射面１３ａで反射されて反射部１８に入射される。反射部１８に入射された光Ｃはミラー素子２０、２０、・・・によって反射方向が制御され、反射板２２の反射面２２ａで反射されカバー３を透過されて前方へ向けて照射される。カバー３を透過された光によって、ミラー素子２０、２０、・・・の制御に応じた所定の配光パターンが形成される。 When light is emitted from the light source 15 of the light source unit 11 in the vehicle headlamp 1C configured as described above, the emitted light C is reflected by the reflection surface 13a of the reflector 13 and is incident on the reflection unit 18. The The reflection direction of the light C incident on the reflection unit 18 is controlled by the mirror elements 20, 20,..., Reflected by the reflection surface 22 a of the reflection plate 22, transmitted through the cover 3, and irradiated forward. A predetermined light distribution pattern according to the control of the mirror elements 20, 20,... Is formed by the light transmitted through the cover 3.
　上記のように構成された車輌用前照灯１Ｃにおいては、反射部１８のミラー素子２０、２０、・・・によって光軸の傾き調整が行われるため、光軸調整を行う別部材を設ける必要がない。従って、部品点数を削減することができる。また、灯具外筐４の外側に一部が位置された光軸調整スクリューを有さないため、車輌用前照灯１Ｃの小型化が図られるほか、構造を簡素化することができる。 In the vehicle headlamp 1 </ b> C configured as described above, since the optical axis inclination is adjusted by the mirror elements 20, 20,... Of the reflecting portion 18, it is necessary to provide another member for adjusting the optical axis. There is no. Therefore, the number of parts can be reduced. In addition, since there is no optical axis adjusting screw partially positioned outside the lamp outer casing 4, the vehicle headlamp 1C can be reduced in size and the structure can be simplified.
　また、車輌用前照灯１Ｃおいては、ミラー素子２０、２０、・・・によって反射方向が制御された光Ｃが反射板２２によって平行光とされる。従って、制御体８の前方に光を平行光にするための投影レンズが位置されないため、車輌用前照灯１Ｃの前後方向における小型化を図ることができる。 Further, in the vehicle headlamp 1C, the light C whose reflection direction is controlled by the mirror elements 20, 20,... Therefore, no projection lens for collimating the light in front of the control body 8 is positioned, so that the size of the vehicle headlamp 1C can be reduced in the front-rear direction.
　尚、上記には、固定体７が制御体８の下方または上方に配置された構成を示したが、固定体７の配置は上記の例に限られず、例えば、制御体８の側方（左右）に位置されていてもよい。 In the above description, the fixed body 7 is arranged below or above the control body 8. However, the arrangement of the fixed body 7 is not limited to the above example. ).
　また、上記には、制御体８が放熱部材１６と光制御ユニット１７を有し、光制御ユニット１７が放熱部材１６の配置部１６ａに配置された構成を示したが、光制御ユニット１７における発熱量が小さいか光制御ユニット１７の耐熱性が高い場合には、制御体８は放熱部材１６を有していなくてもよい。これにより、光制御ユニット１７の後方又は下方に放熱部材１６が位置されないため、車輌用前照灯１、車輌用前照灯１Ａ、車輌用前照灯１Ｂ、車輌用前照灯１Ｃの小型化を図ることができる。 In the above description, the control body 8 has the heat radiating member 16 and the light control unit 17, and the light control unit 17 is arranged in the arrangement portion 16 a of the heat radiating member 16. When the amount is small or the heat resistance of the light control unit 17 is high, the control body 8 may not have the heat radiating member 16. Thereby, since the heat radiating member 16 is not located behind or below the light control unit 17, the vehicle headlamp 1, the vehicle headlamp 1A, the vehicle headlamp 1B, and the vehicle headlamp 1C are downsized. Can be achieved.
　さらに、灯室５には、光源１５から出射された光の一部を遮蔽するシェードが設けられていてもよい。シェードが設けられることで、光源１５から出射され反射部１８に入射されない光を遮蔽して、ミラー素子２０、２０、・・・による、より精密な配光パターンを形成することができるようになる。 Furthermore, the lamp chamber 5 may be provided with a shade that blocks a part of the light emitted from the light source 15. By providing the shade, light emitted from the light source 15 and not incident on the reflection portion 18 can be shielded, and a more precise light distribution pattern can be formed by the mirror elements 20, 20,. .
　尚、上記には光学変換素子としてミラー素子２０を用いた例を示したが、光学変換素子はミラー素子に限られない。光学変換素子としては、例えば、液晶素子が用いられてもよい。 In addition, although the example which used the mirror element 20 as an optical conversion element was shown above, an optical conversion element is not restricted to a mirror element. As the optical conversion element, for example, a liquid crystal element may be used.
　１…車輌用前照灯、２…ランプハウジング、３…カバー、４…灯具外筐、７…固定体、８…制御体、１１…光源ユニット、１２…ヒートシンク、１２ｂ…放熱フィン、１５…光源、１６…放熱部材、１７…光制御ユニット、２０…ミラー素子（光学変換素子）、２１…光軸調整スクリュー DESCRIPTION OF SYMBOLS 1 ... Vehicle headlamp, 2 ... Lamp housing, 3 ... Cover, 4 ... Lamp housing, 7 ... Fixed body, 8 ... Control body, 11 ... Light source unit, 12 ... Heat sink, 12b ... Radiation fin, 15 ... Light source , 16 ... Radiating member, 17 ... Light control unit, 20 ... Mirror element (optical conversion element), 21 ... Optical axis adjusting screw

Claims (6)

  1. 　開口を有するランプハウジングと前記開口を閉塞するカバーとによって構成された灯具外筐と、
    　光源と前記光源の駆動時に発生する熱が伝達されるヒートシンクとを有する光源ユニットと、
    　少なくとも前記光源から出射された光の方向を制御することが可能な光学変換素子を有する光制御ユニットとを備え、
    　前記ヒートシンクは前記灯具外筐に固定され少なくとも一部が前記灯具外筐の外側に位置された
    　車輌用前照灯。     A lamp housing comprising a lamp housing having an opening and a cover for closing the opening;
    A light source unit having a light source and a heat sink to which heat generated during driving of the light source is transmitted;
    A light control unit having at least an optical conversion element capable of controlling the direction of light emitted from the light source,
    The vehicle heat lamp, wherein the heat sink is fixed to the lamp outer casing and at least part of the heat sink is located outside the lamp outer casing.
  2. 　前記光制御ユニットの向きを調整し前記ランプハウジングに支持された光軸調整スクリューが設けられ、
    　前記光制御ユニットの向きが変化されることにより光軸の傾き調整が行われる
    　請求項１に記載の車輌用前照灯。     An optical axis adjustment screw that adjusts the direction of the light control unit and is supported by the lamp housing is provided,
    The vehicle headlamp according to claim 1, wherein an inclination of an optical axis is adjusted by changing a direction of the light control unit.
  3. 　前記光制御ユニットに前記光軸調整スクリューが連結された
    　請求項２に記載の車輌用前照灯。     The vehicle headlamp according to claim 2, wherein the optical axis adjusting screw is connected to the light control unit.
  4. 　前記光学変換素子によって光軸の傾き調整が行われる
    　請求項１に記載の車輌用前照灯。     The vehicle headlamp according to claim 1, wherein an optical axis inclination is adjusted by the optical conversion element.
  5. 　前記光制御ユニットに前記光源の駆動時に発生した熱が伝達される放熱部材が設けられている
    　請求項１、請求項２、請求項３又は請求項４に記載の車輌用前照灯。     The vehicle headlamp according to claim 1, 2, 3, or 4, wherein the light control unit is provided with a heat radiating member to which heat generated when the light source is driven is transmitted.
  6. 　前記光学変換素子はミラー素子である
    　請求項１、請求項２、請求項３、請求項４又は請求項５に記載の車輌用前照灯。     The vehicular headlamp according to claim 1, wherein the optical conversion element is a mirror element.
PCT/JP2019/008191 2018-03-15 2019-03-01 Vehicle head light WO2019176595A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065101A (en) * 1992-06-22 1994-01-14 Koito Mfg Co Ltd Head lamp for automobile
JP2009021135A (en) * 2007-07-12 2009-01-29 Stanley Electric Co Ltd Vehicle headlight
JP2015184591A (en) * 2014-03-25 2015-10-22 スタンレー電気株式会社 Optical scanner and vehicle headlamp device
JP2017097157A (en) * 2015-11-24 2017-06-01 株式会社リコー Image projection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065101A (en) * 1992-06-22 1994-01-14 Koito Mfg Co Ltd Head lamp for automobile
JP2009021135A (en) * 2007-07-12 2009-01-29 Stanley Electric Co Ltd Vehicle headlight
JP2015184591A (en) * 2014-03-25 2015-10-22 スタンレー電気株式会社 Optical scanner and vehicle headlamp device
JP2017097157A (en) * 2015-11-24 2017-06-01 株式会社リコー Image projection device

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