JP7217934B2 - vehicle lamp - Google Patents

vehicle lamp Download PDF

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Publication number
JP7217934B2
JP7217934B2 JP2018233613A JP2018233613A JP7217934B2 JP 7217934 B2 JP7217934 B2 JP 7217934B2 JP 2018233613 A JP2018233613 A JP 2018233613A JP 2018233613 A JP2018233613 A JP 2018233613A JP 7217934 B2 JP7217934 B2 JP 7217934B2
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Prior art keywords
light source
duct portion
laser light
control member
optical control
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JP2020095878A (en
Inventor
和則 岩▲崎▼
秀丸 小谷野
駿太 高木
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Ichikoh Industries Ltd
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Ichikoh Industries Ltd
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Priority to JP2018233613A priority Critical patent/JP7217934B2/en
Priority to PCT/JP2019/042397 priority patent/WO2020121669A1/en
Publication of JP2020095878A publication Critical patent/JP2020095878A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16Laser light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24Light guides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/30Ventilation or drainage of lighting devices
    • F21S45/33Ventilation or drainage of lighting devices specially adapted for headlamps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40Cooling of lighting devices
    • F21S45/42Forced cooling
    • F21S45/43Forced cooling using gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40Cooling of lighting devices
    • F21S45/47Passive cooling, e.g. using fins, thermal conductive elements or openings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/502Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/502Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/504Cooling arrangements characterised by the adaptation for cooling of specific components of refractors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/60Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76Cooling 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

本発明は車両用灯具に関するものである。 The present invention relates to a vehicle lamp.

特許文献1には、レンズ自身にシェードと反射鏡を一体に形成した複合光学レンズを用いた異なる配光特性の複数の光源ユニットでロービーム配光パターンを形成するようにした車両用灯具が開示されている。 Japanese Patent Laid-Open No. 2002-200002 discloses a vehicle lamp that forms a low-beam light distribution pattern with a plurality of light source units having different light distribution characteristics using a compound optical lens in which a shade and a reflecting mirror are integrally formed on the lens itself. ing.

また、特許文献2には、光源に熱的に接続されるヒートシンクの背面に送風するファンを設ける車両用灯具が開示されている。 Further, Patent Literature 2 discloses a vehicle lamp in which a fan for blowing air is provided behind a heat sink thermally connected to a light source.

特開2004-241349号公報Japanese Patent Application Laid-Open No. 2004-241349 特開2012-212521号公報JP 2012-212521 A

ところで、光源としてレーザ光源を使用する場合、光源としてLED(Light Emitting Diode)を用いる場合に比べて、光学部品とレーザ光源との間の距離(隙間)が短くなる傾向があり、レーザ光源による光学部品への影響(例えば溶損)を低減することが難しくなる。 By the way, when a laser light source is used as the light source, the distance (gap) between the optical component and the laser light source tends to be shorter than when an LED (Light Emitting Diode) is used as the light source. It becomes difficult to reduce the influence (for example, melting) on the parts.

そこで、1つの側面では、本発明は、レーザ光源による光学部品への影響を効率的に低減することを目的とする。 Accordingly, in one aspect, an object of the present invention is to efficiently reduce the influence of a laser light source on optical components.

1つの側面では、レーザ光源と、
前記レーザ光源からの光の入射面を有する光学部品と、
送風機と、
一端が前記送風機に連通し、他端が前記レーザ光源に向けて開口する第1ダクト部とを備え、
前記第1ダクト部は、前記一端側から前記他端側に向けて窄まるテーパ状の形態を有する、車両用灯具が提供される。
In one aspect, a laser light source;
an optical component having an incident surface for light from the laser light source;
a blower;
a first duct portion having one end communicating with the blower and the other end opening toward the laser light source;
The vehicle lamp is provided, wherein the first duct portion has a tapered shape that narrows from the one end side toward the other end side.

1つの側面では、本発明によれば、レーザ光源による光学部品への影響を効率的に低減することが可能となる。 In one aspect, according to the present invention, it is possible to efficiently reduce the influence of a laser light source on optical components.

本実施形態の車両用灯具を備えた車両の平面図である。1 is a plan view of a vehicle equipped with the vehicle lamp according to the present embodiment; FIG. 本実施形態の灯具ユニットの斜視図である。1 is a perspective view of a lamp unit of this embodiment; FIG. 本実施形態の灯具ユニットの分解斜視図である。2 is an exploded perspective view of the lamp unit of the embodiment; FIG. フロントカバーを取り外した状態の本実施形態の灯具ユニットの正面図である。FIG. 2 is a front view of the lamp unit of the present embodiment with the front cover removed; 図4のラインA-Aに沿った本実施形態の灯具ユニットの縦断面図である。FIG. 5 is a vertical cross-sectional view of the lamp unit of the present embodiment taken along line AA in FIG. 4; 図4のラインB-Bに沿った本実施形態の灯具ユニットの縦断面図である。FIG. 5 is a vertical cross-sectional view of the lamp unit of the present embodiment taken along line BB in FIG. 4;

以下、添付図面を参照して、本発明を実施するための形態(以下、「実施形態」と称する。)について詳細に説明する。
なお、実施形態の説明の全体を通して同じ要素には同じ番号又は符号を付している。
EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the form (henceforth "embodiment" is called) for implementing this invention is demonstrated in detail.
The same numbers or symbols are given to the same elements throughout the description of the embodiment.

また、実施形態及び図中において、特に断りがない場合、「前」、「後」は、各々、車両102の「前進方向」、「後進方向」を示し、「上」、「下」、「左」、「右」は、各々、車両102に乗車する運転者から見た方向を示す。
なお、言うまでもないが「上」、「下」は鉛直方向での「上」、「下」でもあり、「左」、「右」は水平方向での「左」、「右」でもある。
In the embodiments and drawings, unless otherwise specified, "front" and "rear" indicate the "forward direction" and "reverse direction" of the vehicle 102, respectively, and "up", "down", and ""Left" and "Right" respectively indicate directions viewed from the driver of the vehicle 102 .
Needless to say, "top" and "bottom" are also "top" and "bottom" in the vertical direction, and "left" and "right" are also "left" and "right" in the horizontal direction.

図1は、本実施形態の車両用灯具を備えた車両102の平面図である。
図1に示すように、本実施形態の車両用灯具は、車両102の前方側の左右のそれぞれに設けられる車両用の前照灯(101L、101R)であり、以下では単に車両用灯具と記載する。
FIG. 1 is a plan view of a vehicle 102 equipped with a vehicle lamp according to this embodiment.
As shown in FIG. 1, the vehicle lamps of the present embodiment are vehicle headlamps (101L, 101R) provided on the left and right front sides of a vehicle 102, respectively. do.

本実施形態の車両用灯具は、車両前方側に開口したハウジング(図示せず)と開口を覆うようにハウジングに取り付けられるアウターレンズ(図示せず)を備え、ハウジングとアウターレンズとで形成される灯室内に灯具ユニット1(図2参照)等が配置されている。 The vehicular lamp of this embodiment includes a housing (not shown) that opens toward the front of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed by the housing and the outer lens. A lamp unit 1 (see FIG. 2) and the like are arranged in the lamp chamber.

図2は、本実施形態の灯具ユニット1の斜視図である。図3は、本実施形態の灯具ユニット1の分解斜視図である。図4は、フロントカバー60を取り外した状態の本実施形態の灯具ユニット1の正面図である。図5は、図4のラインA-Aに沿った本実施形態の灯具ユニット1の縦断面図である。ただし、図5は、図4には図示を省略したフロントカバー60が付加された状態の灯具ユニット1の縦断面図である。 FIG. 2 is a perspective view of the lamp unit 1 of this embodiment. FIG. 3 is an exploded perspective view of the lamp unit 1 of this embodiment. FIG. 4 is a front view of the lamp unit 1 of this embodiment with the front cover 60 removed. FIG. 5 is a vertical cross-sectional view of the lamp unit 1 of this embodiment taken along line AA in FIG. However, FIG. 5 is a longitudinal sectional view of the lamp unit 1 with the front cover 60 not shown in FIG. 4 added.

図2から図5に示すように、灯具ユニット1は、ヒートシンク10(放熱部材の一例)と、ヒートシンク10に取り付けられる光源装置20と、光源装置20の前方側に配置される光学制御部材30と、光学制御部材30の一部を覆うカバー40と、ファン50と、フロントカバー60(カバー部材の一例)と、を備えている。そして、灯具ユニット1は、ヒートシンク10とフロントカバー60とによりダクト70が形成されている。 As shown in FIGS. 2 to 5, the lamp unit 1 includes a heat sink 10 (an example of a heat dissipation member), a light source device 20 attached to the heat sink 10, and an optical control member 30 arranged in front of the light source device 20. , a cover 40 that covers a part of the optical control member 30, a fan 50, and a front cover 60 (an example of a cover member). The lamp unit 1 has a duct 70 formed by the heat sink 10 and the front cover 60 .

なお、本実施形態では、一例として、光源装置20が左右に並ぶ態様の対で設けられるが、光源装置20は1つだけ設けられてもよいし、3つ以上設けられてもよい。また、光源装置20の並ぶ方向も車幅方向に平行である必要はなく、また、水平方向に対して平行である必要もない。例えば、光源装置20は、上下に並ぶ態様で対で設けられてもよい。 In this embodiment, as an example, the light source devices 20 are provided in a pair arranged side by side, but only one light source device 20 may be provided, or three or more light source devices 20 may be provided. Also, the direction in which the light source devices 20 are arranged does not need to be parallel to the vehicle width direction, nor does it need to be parallel to the horizontal direction. For example, the light source devices 20 may be arranged in a pair vertically.

(ヒートシンク10)
ヒートシンク10は、対の光源装置20を保持し、対の光源装置20から伝わる熱を放出する機能を有する。ヒートシンク10は、左右に並ぶ態様の対の光源装置20に対応して、左右方向(車両幅方向)の中心に関して左右対称な構成を有する。すなわち、左右の対称な構成のうちの、左部分は、左側の光源装置20に対応した部分であり、右部分は、右側の光源装置20に対応した部分である。以下では、特に言及しない限り、ヒートシンク10について、左右対称な構成のうちの、左右の一方側の部分について説明する。
(Heat sink 10)
The heat sink 10 has a function of holding the pair of light source devices 20 and releasing heat transmitted from the pair of light source devices 20 . The heat sink 10 has a symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), corresponding to the pair of light source devices 20 arranged side by side. That is, in the left-right symmetrical configuration, the left portion corresponds to the light source device 20 on the left side, and the right portion corresponds to the light source device 20 on the right side. In the following, unless otherwise specified, the heat sink 10 will be described with respect to one of the left and right portions of the symmetrical configuration.

ヒートシンク10は、光源装置20を配置するベース部11と、ベース部11の後方側に設けられ、車両幅方向に並ぶ複数の放熱フィン12と、ベース部11の鉛直方向の一方側(図2では下側)に設けられ、前方側に突出する車両幅方向に離間した一対の位置決めピン11Aと、取付部111とを備えている。 The heat sink 10 includes a base portion 11 on which the light source device 20 is arranged, a plurality of heat radiation fins 12 provided on the rear side of the base portion 11 and arranged in the vehicle width direction, and one side of the base portion 11 in the vertical direction (in FIG. A pair of positioning pins 11</b>A projecting forward and spaced apart in the vehicle width direction, and a mounting portion 111 .

なお、ヒートシンク10は、ベース部11には、車両幅方向の中央側であって、鉛直方向に離間する位置に一対のネジ螺合孔11Bが形成されており、一対のネジ螺合孔11Bには、後述する光源装置20を止着させる一対のネジNが螺合固定される。 The base portion 11 of the heat sink 10 is formed with a pair of screw holes 11B at positions spaced apart in the vertical direction on the center side in the vehicle width direction. are screwed and fixed with a pair of screws N for fixing the light source device 20 to be described later.

また、ベース部11の車両幅方向の外側に、取付部111が形成されており、取付部111には、後述する光学制御部材30及びカバー40を止着させる締結部材BTが螺合固定される。締結部材BTは、例えばネジである。 A mounting portion 111 is formed on the outer side of the base portion 11 in the vehicle width direction, and a fastening member BT for fixing the optical control member 30 and the cover 40 to be described later is screwed and fixed to the mounting portion 111. . The fastening member BT is, for example, a screw.

放熱フィン12は、外気との接触面積を増大することで放熱効率を高める部位である。放熱フィン12は、ピンの形態であってもよいし、直線状のストレートフィンの形態であってもよいし、形状等は任意である。本実施形態では、放熱フィン12は、ヒートシンク10の後方側(光源装置20が設けられる側とは逆側)に形成される。 The heat radiation fins 12 are portions that increase the heat radiation efficiency by increasing the contact area with the outside air. The radiation fins 12 may be in the form of pins, may be in the form of linear straight fins, and may have any shape. In this embodiment, the radiation fins 12 are formed on the rear side of the heat sink 10 (the side opposite to the side where the light source device 20 is provided).

本実施形態では、ヒートシンク10はアルミダイカスト製のヒートシンク10になっているが、これに限定される必要はなく、熱伝導率の高い金属又は樹脂等を用いて形成されたものであればよい。 In this embodiment, the heat sink 10 is made of die-cast aluminum, but the heat sink 10 is not limited to this, and may be made of metal, resin, or the like having high thermal conductivity.

本実施形態では、ヒートシンク10は、ベース部11の下方に流路形成部17を有する。流路形成部17は、ファン50によって流れが形成される空気の流路を形成する。流路形成部17は、前側が開口し後側が閉塞した溝部171,172を有する。 In this embodiment, the heat sink 10 has a flow path forming portion 17 below the base portion 11 . The flow path forming portion 17 forms an air flow path in which the flow is formed by the fan 50 . The flow path forming portion 17 has groove portions 171 and 172 that are open on the front side and closed on the rear side.

溝部171,172は、前後方向に視て、下側から上側に向かうにつれて外側に広がる態様で、上下方向で斜めに延在する。溝部171,172は、上端が上側に開口し、下端が下側に開口する。溝部171,172は、前側がフロントカバー60に覆われる。 The grooves 171 and 172 obliquely extend in the vertical direction in such a manner that they widen outward from the bottom to the top when viewed in the front-rear direction. The grooves 171 and 172 open upward at their upper ends and open downward at their lower ends. The front sides of the grooves 171 and 172 are covered with the front cover 60 .

溝部171は、フロントカバー60と協動して、下端がファン50に連通し、上端が光源22に向けて開口する内側ダクト部71(第1ダクト部の一例)(図4参照)を形成する。すなわち、溝部171は、ファン50から光源装置20まで延在する送風流路のうちの一部を形成する。また、溝部172は、フロントカバー60と協動して、ファン50と締結部材BT(取付部111)との間に延在する外側ダクト部72(第2ダクト部の一例)(図4参照)を形成する。 The groove portion 171 cooperates with the front cover 60 to form an inner duct portion 71 (an example of a first duct portion) (see FIG. 4) whose lower end communicates with the fan 50 and whose upper end opens toward the light source 22. . That is, the groove portion 171 forms part of the airflow passage extending from the fan 50 to the light source device 20 . Further, the groove portion 172 cooperates with the front cover 60 to form an outer duct portion 72 (an example of a second duct portion) extending between the fan 50 and the fastening member BT (mounting portion 111) (see FIG. 4). to form

(光源装置20)
光源装置20は、左右に並ぶ態様の対で設けられる。以下では、特に言及しない限り、一方の光源装置20について代表して説明する。
光源装置20は、熱伝達部材21と、熱伝達部材21上に配置された光源22と、熱伝達部材21上に配置され、光源22に対応する位置に設けられた開口部23Aと外部コネクタが接続されるコネクタ接続部23Bを有する接続部23と、を備えている。
(Light source device 20)
The light source devices 20 are provided in pairs arranged side by side. Hereinafter, one light source device 20 will be described as a representative unless otherwise specified.
The light source device 20 includes a heat transfer member 21, a light source 22 arranged on the heat transfer member 21, an opening 23A arranged on the heat transfer member 21 and provided at a position corresponding to the light source 22, and an external connector. and a connection portion 23 having a connector connection portion 23B to be connected.

なお、コネクタ接続部23Bは、熱伝達部材21よりも鉛直方向の他方側(図2では上側)に位置し、熱伝達部材21よりも一部が後方側に出っ張るように設けられており、先に触れたように、この出っ張った部分が、放熱フィン12の後方側に切欠かれたような形状の部分に位置することになる。 Note that the connector connection portion 23B is positioned on the other side in the vertical direction (upper side in FIG. 2) of the heat transfer member 21, and is provided so as to partially protrude rearward from the heat transfer member 21. As mentioned above, the protruding portion is located in a portion of the radiation fin 12 which is cut out on the rear side.

本実施形態では、熱伝達部材21は、光源22よりも外形の大きいアルミ製の板材を用いているが、材料はアルミに限定される必要はなく、熱伝導率の高いアルミ以外の金属又は樹脂等であってもよい。 In this embodiment, the heat transfer member 21 uses an aluminum plate material having a larger outer shape than the light source 22, but the material is not limited to aluminum, and a metal or resin other than aluminum having high thermal conductivity can be used. etc.

そして、熱伝達部材21は、光源22で発生する熱を速やかに広い範囲に拡散しつつ、熱を効率よくヒートシンク10に伝達して光源22の冷却効率を高める役目を果たす。 The heat transfer member 21 quickly diffuses the heat generated by the light source 22 over a wide area and efficiently transfers the heat to the heat sink 10 to improve the cooling efficiency of the light source 22 .

光源22は、光を透過する発光領域22Bを有する基板22Aと、基板22Aの裏側に配置され、発光領域22Bを発光させるための光を出射する発光チップ(図示せず)と、を備え、本実施形態では、発光チップにLDチップ(レーザーダイオードチップ)が用いられたLD光源(レーザー光源)になっている。 The light source 22 includes a substrate 22A having a light-emitting region 22B that transmits light, and a light-emitting chip (not shown) arranged on the back side of the substrate 22A and emitting light for causing the light-emitting region 22B to emit light. In the embodiment, the light emitting chip is an LD light source (laser light source) using an LD chip (laser diode chip).

接続部23は、例えば、耐熱性に優れた電気絶縁樹脂を用いたインサート成形で、光源22と外部コネクタとの電気的な接続を行うための電気配線(図示せず)を内部に収容するように形成された部材であり、その電気配線(図示せず)の一端側が開口部23Aに導出され光源22との電気的な接続が行われ、その電気配線(図示せず)の他端側がコネクタ接続部23B内に導出され、外部コネクタとの電気的な接続が行われるようになっている。 The connection part 23 is, for example, insert-molded using an electrical insulating resin with excellent heat resistance so as to accommodate an electrical wiring (not shown) for electrically connecting the light source 22 and an external connector. One end of the electrical wiring (not shown) is led out to the opening 23A and electrically connected to the light source 22, and the other end of the electrical wiring (not shown) is a connector It is led out into the connecting portion 23B and electrically connected to an external connector.

そして、光源装置20は、ベース部11に設けられた一対の位置決めピン11Aを通す一対の位置決め孔24Aと、ベース部11に設けられたネジ螺合孔11Bに対応する位置に設けられた一対のネジ孔24Bと、を備えており、位置決めピン11Aで位置決めされた状態でネジNによってヒートシンク10に対して固定できるようになっている。 The light source device 20 includes a pair of positioning holes 24A through which the pair of positioning pins 11A provided in the base portion 11 pass, and a pair of positioning holes 24A provided at positions corresponding to the screw engagement holes 11B provided in the base portion 11. It is provided with a screw hole 24B, and can be fixed to the heat sink 10 with a screw N while being positioned by the positioning pin 11A.

(光学制御部材30)
光学制御部材30は、左右に並ぶ態様の対の光源装置20に対応して、左右方向の中心に対して左右対称な構成を有する。すなわち、左右の対称な構成のうちの、左部分は、左側の光源装置20に対応した部分であり、右部分は、右側の光源装置20に対応した部分である。以下では、特に言及しない限り、光学制御部材30について、左右対称な構成のうちの、左右の一方側の部分について説明する。
(Optical control member 30)
The optical control member 30 has a symmetrical configuration with respect to the center in the left-right direction, corresponding to the pair of light source devices 20 arranged side by side. That is, in the left-right symmetrical configuration, the left portion corresponds to the light source device 20 on the left side, and the right portion corresponds to the light source device 20 on the right side. In the following, unless otherwise specified, the optical control member 30 will be described with respect to one of the left and right portions of the symmetrical configuration.

光学制御部材30は、光源22からの光を前方側に照射する複合光学レンズ31と、複合光学レンズ31をカバー40とともにヒートシンク10に対して固定するための固定部32と、を備えており、複合光学レンズ31と固定部32が、透明な樹脂(例えば、アクリル系樹脂やポリカーボネート系樹脂)で一体成形された部材である。光学制御部材30は、ガラスにより形成されてもよい。 The optical control member 30 includes a compound optical lens 31 that irradiates the light from the light source 22 forward, and a fixing portion 32 for fixing the compound optical lens 31 together with the cover 40 to the heat sink 10, The composite optical lens 31 and the fixing portion 32 are integrally molded members made of transparent resin (for example, acrylic resin or polycarbonate resin). The optical control member 30 may be made of glass.

固定部32は、外側に延在する脚部32Aと、脚部32Aに繋がるように設けられた固定のための基部32Bと、を備えている。 The fixed portion 32 includes an outwardly extending leg portion 32A and a fixing base portion 32B connected to the leg portion 32A.

そして、基部32Bは、ベース部11に設けられた一対の位置決めピン11Aを通す一対の位置決め孔32BA(図4参照)と、ベース部11の外側に設けられた取付部111に対応する位置に設けられたネジ孔32BBと、を備えており、位置決めピン11Aで位置決めされた状態で、締結部材BTによってカバー40とともにヒートシンク10に対して固定される。 The base portion 32B is provided at a position corresponding to a pair of positioning holes 32BA (see FIG. 4) through which a pair of positioning pins 11A provided in the base portion 11 pass, and a mounting portion 111 provided outside the base portion 11. It is fixed to the heat sink 10 together with the cover 40 by the fastening member BT while being positioned by the positioning pin 11A.

なお、本実施形態では、光学制御部材30の基部32Bは、ヒートシンク10に固定されるが、光源装置20の接続部23上に配置されてもよい。この場合、接続部23が光学制御部材30と熱伝達部材21の間に設けられた熱を絶縁する熱絶縁体としての機能を果たすことで、光学制御部材30に耐熱性の低いアクリル系樹脂(例えば、耐熱温度100℃程度)を使用することも可能となり得る。 Although the base portion 32B of the optical control member 30 is fixed to the heat sink 10 in this embodiment, it may be arranged on the connection portion 23 of the light source device 20. FIG. In this case, the connection portion 23 functions as a thermal insulator that insulates heat provided between the optical control member 30 and the heat transfer member 21, so that the optical control member 30 is made of an acrylic resin (with low heat resistance). For example, it may be possible to use a heat resistant temperature of about 100°C.

また、本実施形態では、複合光学レンズ31は、所望の配光が得られるように形成されるが、複合光学レンズ31の構成自体は任意である。なお、対で設けられる複合光学レンズ31は、左右の対称ではなく、全体として所望の配光が得られるように、互いに異なる構成であってもよい。 Moreover, in the present embodiment, the compound optical lens 31 is formed so as to obtain a desired light distribution, but the configuration itself of the compound optical lens 31 is arbitrary. In addition, the compound optical lenses 31 provided in a pair may have different configurations from each other so as to obtain a desired light distribution as a whole instead of being symmetrical in the left-right direction.

(カバー40)
カバー40は、複合光学レンズ31の光を出射する出射面31A(図2参照)及び光を入射させる入射面31B(図5参照)を塞がないように開口し、複合光学レンズ31の側面を覆う略円筒状の覆い部41と、覆い部41の後端側に位置し、覆い部41から外側に突出するように設けられ、光学制御部材30、及び、光源装置20とともにヒートシンク10に対して固定するためのフランジ部42と、を備えている。
(Cover 40)
The cover 40 is open so as not to block the exit surface 31A (see FIG. 2) for emitting light of the compound optical lens 31 and the entrance surface 31B (see FIG. 5) for entering light, and covers the side surface of the compound optical lens 31. A substantially cylindrical cover portion 41 for covering, and a cover portion 41 positioned on the rear end side of the cover portion 41 and provided so as to protrude outward from the cover portion 41 , and are provided with respect to the heat sink 10 together with the optical control member 30 and the light source device 20 . and a flange portion 42 for fixing.

フランジ部42は、ベース部11に設けられた一対の位置決めピン11Aを通す一対の位置決め孔42A(図4参照)と、ベース部11の外側に設けられた取付部111に対応する位置に設けられたネジ孔42Bと、を備えており、位置決めピン11Aで位置決めされた状態で、締結部材BTによって、光学制御部材30とともにヒートシンク10に対して固定される。 The flange portion 42 is provided at a position corresponding to a pair of positioning holes 42A (see FIG. 4) through which the pair of positioning pins 11A provided in the base portion 11 pass, and the mounting portion 111 provided outside the base portion 11. It is fixed to the heat sink 10 together with the optical control member 30 by the fastening member BT while being positioned by the positioning pin 11A.

なお、カバー40は、複合光学レンズ31の出射面31A以外の位置から光が漏れるのを抑制するためのものであり、本実施形態では、光が透過しない不透明な樹脂で形成したものになっている。 The cover 40 is for suppressing leakage of light from a position other than the exit surface 31A of the compound optical lens 31, and in this embodiment, it is made of an opaque resin that does not transmit light. there is

ただし、カバー40は、光が透過するような透明な樹脂で形成され、表面に光の透過を抑制する着色層を形成したものであってもよい。 However, the cover 40 may be made of a transparent resin that allows light to pass therethrough, and may have a colored layer formed on the surface thereof to suppress the transmission of light.

本実施形態では、カバー40は、図5に示すように、下端部がフロントカバー60の上端部と上下方向に近接又は当接する。なお、別の実施形態では、カバー40は、下部がフロントカバー60の上部に重なる態様で設けられてもよい。 In this embodiment, as shown in FIG. 5, the lower end of the cover 40 approaches or abuts the upper end of the front cover 60 in the vertical direction. Note that, in another embodiment, the cover 40 may be provided in such a manner that the lower portion overlaps the upper portion of the front cover 60 .

カバー40は、下部(光学制御部材30よりも下方の部位)が、内側ダクト部71と隙間90との間に位置し、送風流路の一部を形成する。カバー40は、好ましくは、側面視で、図5に示すように、下部の内面(送風流路側の表面)が、下方に向かうほど前方に向かう態様で傾斜する。これにより、送風流路のうちの、カバー40が形成する部分は、上側が細くなるテーパ状となり、光源装置20に向かう空気の流速を効率的に速めることができる。 A lower portion (a portion below the optical control member 30) of the cover 40 is located between the inner duct portion 71 and the gap 90, and forms a part of the airflow passage. The cover 40 preferably has a lower inner surface (a surface on the side of the airflow path) that slopes forward as it goes downward, as shown in FIG. 5 in a side view. As a result, the portion of the airflow path formed by the cover 40 is tapered with the upper side narrowed, and the flow velocity of the air toward the light source device 20 can be efficiently increased.

(ファン50)
ファン50は、送風機の一例であり、例えば電動式で動作する。ファン50は、2つの光源装置20に対して共通で1つだけ設けられる。ただし、他の実施形態では、ファン50は、光源装置20ごとに設けられてもよい。
(Fan 50)
The fan 50 is an example of an air blower, and operates electrically, for example. Only one fan 50 is provided in common for the two light source devices 20 . However, in other embodiments, the fan 50 may be provided for each light source device 20 .

ファン50は、上向きに空気の流れを生成する。ファン50は、ヒートシンク10の放熱フィン12間を通る空気の流れを生成することで、ヒートシンク10を冷却する機能(以下、「ヒートシンク冷却機能」とも称する)を備える。また、ファン50は、光源22と光学制御部材30の間に、空気の流れを生成することで、後述のダクト70と協動して、光源22からの熱又はエネルギによる光学制御部材30への影響を低減する機能(以下、「レンズ熱保護機能」とも称する)を備える。以下では、特に言及しない限り、説明中の空気の流れは、ファン50によって形成される流れである。 The fan 50 creates an upward airflow. The fan 50 has a function of cooling the heat sink 10 by generating airflow passing between the heat radiation fins 12 of the heat sink 10 (hereinafter also referred to as “heat sink cooling function”). In addition, the fan 50 generates an air flow between the light source 22 and the optical control member 30, and cooperates with the duct 70 described later to transfer heat or energy from the light source 22 to the optical control member 30. It has a function to reduce the influence (hereinafter also referred to as "lens heat protection function"). Hereinafter, the air flow in the description is the flow created by the fan 50 unless otherwise specified.

本実施形態では、一例として、ファン50は、ヒートシンク10の放熱フィン12の下方と、光源22と光学制御部材30の間の下方とをカバーする態様で設けられる。ただし、ファン50は、上述したヒートシンク冷却機能及びレンズ熱保護機能が確保される限り、任意の位置に設けられてよい。例えばレンズ熱保護機能に関しては、変形例では、ファン50は、光源22と光学制御部材30の間の上方や側方に設けられてもよい。あるいは、ファン50は、光源22と光学制御部材30の間に対して、オフセットして設けられてもよい。この場合、ダクト70が当該オフセットを吸収するように構成されることで、上記のレンズ熱保護機能を確保することができる。また、上述したヒートシンク冷却機能を実現するためのファンと、上述したレンズ熱保護機能を実現するためのファンとが別々に設けられてもよい。 In this embodiment, as an example, the fan 50 is provided so as to cover the area below the radiation fins 12 of the heat sink 10 and the area below the light source 22 and the optical control member 30 . However, the fan 50 may be provided at any position as long as the heat sink cooling function and the lens heat protection function described above are ensured. For example, regarding the lens heat protection function, in a variant, the fan 50 may be provided above or to the side between the light source 22 and the optical control member 30 . Alternatively, fan 50 may be offset between light source 22 and optical control member 30 . In this case, the above lens heat protection function can be ensured by configuring the duct 70 to absorb the offset. Also, a fan for realizing the heat sink cooling function described above and a fan for realizing the lens heat protection function described above may be provided separately.

ファン50は、灯具ユニット1の点灯状態において常時動作してもよいし、灯具ユニット1の点灯状態において、所定の動作条件が成立した場合に動作してもよい。 The fan 50 may always operate when the lighting unit 1 is lit, or may operate when a predetermined operating condition is satisfied when the lighting unit 1 is lit.

(フロントカバー60)
フロントカバー60は、例えば樹脂により形成される。フロントカバー60は、板状の形態である。フロントカバー60は、2つの光源装置20に対して共通で1つだけ設けられる。ただし、他の実施形態では、フロントカバー60は、光源装置20ごとに設けられてもよい。フロントカバー60は、ヒートシンク10の左右それぞれの溝部171,172を前方から覆う。
フロントカバー60は、上述のように、内側ダクト部71、72を形成する部材であるので、好ましくは、ある程度気密性の高い構成(すなわち穴等のない構成)であり、ある程度気密性の高い態様で周辺部品に接続される。なお、本実施形態では、フロントカバー60は、図2に示すように、内側の溝部171については略全体を覆うが、外側の溝部172については上側かつ外側の一部を覆わない。ただし、他の実施形態では、フロントカバー60は、外側の溝部172についても、締結部材BTに至るまでの略全体を覆ってもよい。また、フロントカバー60は、上述のように、上端がカバー40の下部に上下方向で近接又は当接する。
(Front cover 60)
The front cover 60 is made of resin, for example. The front cover 60 has a plate-like shape. Only one front cover 60 is provided in common for the two light source devices 20 . However, in other embodiments, the front cover 60 may be provided for each light source device 20 . The front cover 60 covers the left and right grooves 171 and 172 of the heat sink 10 from the front.
Since the front cover 60 is a member that forms the inner duct portions 71 and 72 as described above, it preferably has a somewhat airtight configuration (that is, a configuration without holes or the like), and a somewhat airtight configuration. connected to the peripheral parts. In this embodiment, as shown in FIG. 2, the front cover 60 covers substantially the entire inner groove portion 171 but does not partially cover the upper and outer portion of the outer groove portion 172 . However, in another embodiment, the front cover 60 may cover substantially the entire outer groove 172 up to the fastening member BT. Further, the front cover 60 has its upper end close to or in contact with the lower portion of the cover 40 in the vertical direction, as described above.

(ダクト70)
ダクト70は、ファン50により発生される空気の流れを、光源装置20及び締結部材BTに導く機能を有する。ダクト70は、左右に並ぶ態様の対の光源装置20に対応して、左右方向(車両幅方向)の中心に関して左右対称な構成を有する。以下では、特に言及しない限り、ダクト70について、左右対称な構成のうちの、左右の一方側の部分について説明する。
(duct 70)
The duct 70 has a function of guiding the flow of air generated by the fan 50 to the light source device 20 and the fastening member BT. The duct 70 has a symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), corresponding to the pair of light source devices 20 arranged side by side. In the following, unless otherwise specified, the duct 70 will be described with respect to one of the left and right portions of the symmetrical configuration.

ダクト70は、内側ダクト部71及び外側ダクト部72を含む。内側ダクト部71及び外側ダクト部72は、上述したように、ヒートシンク10とフロントカバー60とにより形成される。ただし、他の実施形態では、内側ダクト部71及び外側ダクト部72の一部又は全部は、ヒートシンク10及びフロントカバー60とは異なる部材により形成されてもよい。この場合、例えばヒートシンク10は、内側ダクト部71及び外側ダクト部72を一切形成しない構成であってもよい。 Duct 70 includes an inner duct portion 71 and an outer duct portion 72 . The inner duct portion 71 and the outer duct portion 72 are formed by the heat sink 10 and the front cover 60 as described above. However, in other embodiments, part or all of the inner duct portion 71 and the outer duct portion 72 may be formed of a member different from the heat sink 10 and the front cover 60 . In this case, for example, the heat sink 10 may have a configuration in which the inner duct portion 71 and the outer duct portion 72 are not formed at all.

内側ダクト部71は、下端がファン50に連通し、上端が光源22に向けて開口する。内側ダクト部71は、側面視で(左右方向に視て)、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。すなわち、内側ダクト部71は、側面視で、下方から上方に向かって細くなる(窄まる)テーパ状の形態を有する。本実施形態では、内側ダクト部71は、上下方向の全体にわたってテーパを有するが、他の実施形態では、上下方向の一部分だけにわたってテーパを有してもよい。以下では、内側ダクト部71における上端側の開口部を、「内側ダクト部71の出口開口部711」とも称する。 The inner duct portion 71 communicates with the fan 50 at its lower end and opens toward the light source 22 at its upper end. The inner duct portion 71 has a tapered form in which the flow velocity is higher at the upper end than at the lower end when viewed from the side (viewed in the left-right direction). That is, the inner duct portion 71 has a tapered form that narrows (narrows) upward from the bottom when viewed from the side. In this embodiment, the inner duct portion 71 has a taper over the entire vertical direction, but in other embodiments, it may have a taper over only a part of the vertical direction. Below, the opening on the upper end side of the inner duct portion 71 is also referred to as "the exit opening 711 of the inner duct portion 71".

また、本実施形態では、内側ダクト部71は、更に、正面視でも(前後方向に視ても)、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。すなわち、内側ダクト部71の出口開口部711の幅d2と、入口開口部の幅d0(図4参照)は、d0>d2である。なお、内側ダクト部71の出口開口部711の幅d2は、複合光学レンズ31の入射面31Bのサイズに応じて決定されてよい。 In addition, in the present embodiment, the inner duct portion 71 further has a tapered shape such that the flow velocity is higher at the upper end than at the lower end, even when viewed from the front (even when viewed in the front-rear direction). That is, the width d2 of the outlet opening 711 of the inner duct portion 71 and the width d0 of the inlet opening (see FIG. 4) satisfy d0>d2. Note that the width d2 of the outlet opening 711 of the inner duct portion 71 may be determined according to the size of the incident surface 31B of the compound optical lens 31 .

このようにして、本実施形態では、内側ダクト部71は、上側が細くなるテーパ状の形態を有するので、ファン50からの空気の流れの流速を高めることができ、流速が高められた空気を出口開口部711から光源装置20へと流入させることができる。 In this manner, in this embodiment, the inner duct portion 71 has a tapered shape tapered upward, so that the flow velocity of the air from the fan 50 can be increased, and the air with the increased flow velocity can be supplied. It can flow into the light source device 20 through the outlet opening 711 .

ただし、別の実施形態では、内側ダクト部71は、正面視及び側面視のいずれか一方でのみで、又は他の方向視のみで、上側が細くなるテーパ状の形態を有してもよい。 However, in another embodiment, the inner duct portion 71 may have a tapered form that narrows at the upper side only when viewed from the front or the side, or only when viewed from the other direction.

なお、本実施形態では、内側ダクト部71は、上述のように、1つの光源装置20に対して、1つ設けられるが、他の実施形態では、内側ダクト部71は、1つの光源装置20に対して、複数個設けられてもよい。 In this embodiment, one inner duct portion 71 is provided for one light source device 20 as described above. may be provided in plurality.

内側ダクト部71は、好ましくは、光源22の近傍に出口開口部711を有するように構成・配置される。例えば内側ダクト部71は、光学制御部材30の入射面31Bの下端付近まで延在する。この場合、内側ダクト部71の出口開口部711から流出する空気を、効率的に光学制御部材30と光源22との間の隙間90(図5参照)に流すことができ、レンズ熱保護機能を高めることができる。なお、ここでは、隙間90とは、便宜上、光学制御部材30の入射面31Bの各点と光源22の発光中心との間を結ぶ各線分を内包する空間として定義する。 The inner duct portion 71 is preferably constructed and arranged to have an exit opening 711 in the vicinity of the light source 22 . For example, the inner duct portion 71 extends to near the lower end of the incident surface 31B of the optical control member 30. As shown in FIG. In this case, the air flowing out from the outlet opening 711 of the inner duct portion 71 can be efficiently flowed to the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22, and the lens heat protection function can be achieved. can be enhanced. Here, for the sake of convenience, the gap 90 is defined as a space including each line segment connecting each point on the incident surface 31B of the optical control member 30 and the light emission center of the light source 22 .

また、内側ダクト部71は、好ましくは、出口開口部711が、光学制御部材30と光源22との間の隙間90(図5参照)に向くように配置される。すなわち、内側ダクト部71内を流れる空気の流れ方向(主要な流れ方向)に視て、出口開口部711は、光学制御部材30と光源22との間の隙間90(図5参照)に対して、少なくとも部分的に重なる位置に配置される。この場合も、内側ダクト部71の出口開口部711から流出する空気を、効率的に光学制御部材30と光源22との間の隙間90(図5参照)に流すことができ、レンズ熱保護機能を高めることができる。 Also, the inner duct portion 71 is preferably arranged such that the exit opening 711 faces the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22 . That is, when viewed in the flow direction (main flow direction) of the air flowing through the inner duct portion 71, the exit opening 711 is positioned relative to the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22. , are positioned to at least partially overlap. In this case also, the air flowing out from the outlet opening 711 of the inner duct portion 71 can be efficiently flowed to the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22, and the lens heat protection function can be achieved. can increase

外側ダクト部72は、ファン50と締結部材BT(取付部111)との間に延在する。外側ダクト部72は、側面視で(左右方向に視て)、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。本実施形態では、外側ダクト部72は、上下方向の全体にわたってテーパを有するが、他の実施形態では、上下方向の一部分だけにわたってテーパを有してもよい。 The outer duct portion 72 extends between the fan 50 and the fastening member BT (mounting portion 111). The outer duct portion 72 has a tapered form in which the flow velocity is higher at the upper end than at the lower end when viewed from the side (viewed in the left-right direction). In this embodiment, the outer duct portion 72 has a taper over the entire vertical direction, but in other embodiments, it may have a taper over only a part of the vertical direction.

また、本実施形態では、外側ダクト部72は、更に、正面視でも(前後方向に視ても)、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。すなわち、外側ダクト部72の下流側の幅d3と、入口開口部の幅d4(図4参照)は、d4>d3である。 Further, in the present embodiment, the outer duct portion 72 further has a tapered form such that the flow velocity is higher at the upper end than at the lower end, even when viewed from the front (even when viewed in the front-rear direction). That is, the width d3 of the downstream side of the outer duct portion 72 and the width d4 of the inlet opening (see FIG. 4) satisfy d4>d3.

このようにして、本実施形態では、外側ダクト部72は、上側が細くなるテーパ状の形態を有するので、ファン50からの空気の流れの流速を高めることができ、流速が高められた空気を締結部材BT(取付部111)に当てることができる。 In this way, in this embodiment, the outer duct portion 72 has a tapered shape that narrows on the upper side, so that the flow velocity of the air from the fan 50 can be increased, and the air with the increased flow velocity can be supplied. It can be brought into contact with the fastening member BT (mounting portion 111).

ただし、別の実施形態では、外側ダクト部72は、正面視及び側面視のいずれか一方でのみで、又は他の方向視のみで、上側が細くなるテーパ状の形態を有してもよい。 However, in another embodiment, the outer duct portion 72 may have a tapered shape that narrows on the upper side only when viewed from the front or the side, or only when viewed from the other direction.

(作用・動作等)
次に、図5を続けて参照し、かつ、図6を参照して、本実施形態によるファン50及びダクト70の作用について説明する。
(action, operation, etc.)
Next, with continued reference to FIG. 5 and reference to FIG. 6, the operation of the fan 50 and duct 70 according to this embodiment will be described.

図6は、図4のラインB-Bに沿った本実施形態の灯具ユニット1の縦断面図である。 FIG. 6 is a vertical cross-sectional view of the lamp unit 1 of this embodiment taken along line BB in FIG.

まず、図5を参照するに、ファン50が作動すると、矢印R1で示すように、内側ダクト部71を介して上方へと空気が流れる。内側ダクト部71は、上述のように、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。従って、内側ダクト部71を流れる空気は、上方に向かうほど流速が高くなる。このようにして流速が速められた空気は、出口開口部711から上方へと流出し、矢印R2に示すように、カバー40と光源装置20との間の送風流路部分を通過する。本実施形態では、カバー40と光源装置20との間の送風流路部分も上側が細くなるテーパ状であるので、空気の流れは、カバー40と光源装置20との間の送風流路部分においても速められる。その後、このようにして流速が速められた空気は、光学制御部材30と光源22との間の隙間90へと流入する。なお、この際、光源22を含む光源装置20自体も直接的に空気(風)が当たることで冷却される。 First, referring to FIG. 5, when the fan 50 operates, air flows upward through the inner duct portion 71 as indicated by the arrow R1. As described above, the inner duct portion 71 has a tapered shape such that the flow velocity is higher at the upper end than at the lower end. Therefore, the flow velocity of the air flowing through the inner duct portion 71 increases as it goes upward. The air whose flow velocity has been increased in this manner flows upward from the outlet opening 711 and passes through the airflow channel portion between the cover 40 and the light source device 20 as indicated by an arrow R2. In the present embodiment, the air flow path portion between the cover 40 and the light source device 20 is also tapered so that the upper side becomes narrower. can also be accelerated. After that, the air whose flow velocity has been increased in this way flows into the gap 90 between the optical control member 30 and the light source 22 . At this time, the light source device 20 itself including the light source 22 is also cooled by being directly exposed to the air (wind).

矢印R3に示すように、光学制御部材30と光源22との間の隙間90に空気が流れると、隙間90に溜まりうる熱が、空気とともに隙間90の外へと(隙間90の上側へと)移動される(矢印R4参照)。これにより、レンズ熱保護機能が実現される。 As shown by arrow R3, when air flows through gap 90 between optical control member 30 and light source 22, heat that can accumulate in gap 90 moves out of gap 90 (to the upper side of gap 90) along with the air. is moved (see arrow R4). This realizes a lens thermal protection function.

また、図6を参照するに、ファン50が作動すると、内側ダクト部71の場合と同様に、矢印R5で示すように、外側ダクト部72を介して上方へと空気が流れる。外側ダクト部72は、上述のように、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。従って、外側ダクト部72を流れる空気は、上方に向かうほど流速が高くなる。このようにして流速が速められた空気は、取付部111まわりを通り、取付部111まわりを冷却し、外部へと流出する(矢印R6参照)。これにより、レンズ熱保護機能が実現される。 Further, referring to FIG. 6, when the fan 50 operates, air flows upward through the outer duct portion 72 as indicated by the arrow R5, as in the case of the inner duct portion 71. FIG. As described above, the outer duct portion 72 has a tapered shape such that the flow velocity is higher at the upper end than at the lower end. Therefore, the flow velocity of the air flowing through the outer duct portion 72 increases as it goes upward. The air whose flow velocity has been increased in this way passes around the mounting portion 111, cools the surroundings of the mounting portion 111, and flows out to the outside (see arrow R6). This realizes a lens thermal protection function.

ところで、灯具ユニット1の小型化を図るためには、光学系の小型化を図るべくLEDよりも面積の小さい蛍光体をもつLD光源(レーザー光源)とするとき、光源光束の損失を最小限に抑えるため、LD光源(レーザー光源)と光学部品の距離が、LEDのそれより近いレイアウトとなる。すなわち、本実施形態でいう光学制御部材30と光源22との間の距離Δ1(光源22の光軸方向での離間距離、図5参照)は、LD光源(レーザー光源)を用いる方が、LEDを用いる場合よりも短くなる傾向となる。例えば、LD光源(レーザー光源)を用いる場合、光学制御部材30と光源22との間の隙間は、0.3mm~5mm程度となる傾向がある。 By the way, in order to reduce the size of the lamp unit 1, when an LD light source (laser light source) having a phosphor having a smaller area than the LED is used in order to reduce the size of the optical system, the loss of the light source luminous flux is minimized. In order to suppress this, the distance between the LD light source (laser light source) and the optical parts is shorter than that of the LED. That is, the distance Δ1 between the optical control member 30 and the light source 22 in the present embodiment (the separation distance of the light source 22 in the optical axis direction, see FIG. 5) is greater when the LD light source (laser light source) is used. tends to be shorter than when using For example, when using an LD light source (laser light source), the gap between the optical control member 30 and the light source 22 tends to be about 0.3 mm to 5 mm.

光学制御部材30と光源22との間の距離Δ1が小さくなると、光源22による光学制御部材30への悪影響(例えば光学制御部材30の溶損)が生じやすくなる。具体的には、光源22の発する光エネルギと、光源22を熱源とする熱伝達による空間温度上昇(すなわち隙間90における温度上昇)が顕著となる。この場合、隙間90の温度が、光学制御部材30の入射面31Bが耐熱温度を越えると、光学制御部材30の溶損が生じるおそれがある。 As the distance Δ1 between the optical control member 30 and the light source 22 becomes smaller, the light source 22 is more likely to adversely affect the optical control member 30 (for example, melt the optical control member 30). Specifically, the spatial temperature rise (that is, the temperature rise in the gap 90) due to the light energy emitted by the light source 22 and the heat transfer using the light source 22 as a heat source becomes significant. In this case, if the temperature of the gap 90 exceeds the heat-resistant temperature of the incident surface 31B of the optical control member 30, the optical control member 30 may be melted.

この点、本実施形態によれば、上述のように、光学制御部材30と光源22との間の隙間90に向けて、ファン50から内側ダクト部71を介して空気が強制的に流されるので、隙間90における温度上昇を低減できる。この結果、隙間90の温度が、光学制御部材30の入射面31Bが耐熱温度を越える可能性を低減できる。よって、本実施形態によれば、光学制御部材30と光源22との間の距離Δ1が小さい場合でも、光学制御部材30の溶損が生じる可能性を低減できる。 In this respect, according to the present embodiment, air is forced to flow from the fan 50 through the inner duct portion 71 toward the gap 90 between the optical control member 30 and the light source 22 as described above. , the temperature rise in the gap 90 can be reduced. As a result, it is possible to reduce the possibility that the temperature of the gap 90 exceeds the heat resistant temperature of the incident surface 31B of the optical control member 30 . Therefore, according to the present embodiment, even when the distance Δ1 between the optical control member 30 and the light source 22 is small, the possibility that the optical control member 30 will be melted can be reduced.

また、本実施形態によれば、内側ダクト部71が出口開口部711側で流速が高くなるようなテーパ状の形態を有するので、光学制御部材30と光源22との間の隙間90を通る空気の流速を高めることができる。光学制御部材30と光源22との間の隙間90を通る空気の流速が高いほど、隙間90における温度上昇を効率的に低減できる。従って、本実施形態によれば、例えばファン50の出力を過大とすることなく、隙間90における温度上昇を適切に低減できる。 Further, according to this embodiment, since the inner duct portion 71 has a tapered shape such that the flow velocity increases on the exit opening portion 711 side, the air passing through the gap 90 between the optical control member 30 and the light source 22 is reduced. can increase the flow velocity of The higher the flow velocity of the air passing through the gap 90 between the optical control member 30 and the light source 22, the more efficiently the temperature rise in the gap 90 can be reduced. Therefore, according to the present embodiment, the temperature rise in the gap 90 can be appropriately reduced without excessively increasing the output of the fan 50, for example.

ところで、内側ダクト部71の出口開口部711から流出する際の空気の流速が比較的高い場合でも、光学制御部材30と光源22との間の隙間90に至る前に、流路の急拡大や急縮小等、抵抗等による損失があると、光学制御部材30と光源22との間の隙間90を通る空気の流速を効率的に高めることが難しい。この観点から、隙間90と出口開口部711との間での空気の流れの損失を低減するために、上下方向で隙間90と出口開口部711との間に、閉塞された流路(送風流路部分)が形成されることが望ましい。この点、本実施形態では、上述のように、カバー40とフロントカバー60とは上下方向で近接又は当接するので、上下方向で隙間90と出口開口部711との間に、実質的に閉塞された流路(送風流路部分)が形成される By the way, even if the flow velocity of the air flowing out from the outlet opening 711 of the inner duct portion 71 is relatively high, the flow path may expand rapidly or the flow path may expand before reaching the gap 90 between the optical control member 30 and the light source 22 . If there is a loss due to resistance such as rapid contraction, it is difficult to efficiently increase the flow velocity of the air passing through the gap 90 between the optical control member 30 and the light source 22 . From this point of view, in order to reduce the loss of air flow between the gap 90 and the outlet opening 711, a blocked flow path (air flow It is desirable that a path portion) is formed. In this regard, in the present embodiment, as described above, the cover 40 and the front cover 60 are in close proximity or in contact with each other in the vertical direction. A flow path (blowing flow path portion) is formed

また、内側ダクト部71の出口開口部711の幅Δ3は、光学制御部材30と光源22との間の距離Δ1よりもわずかに大きい場合には、内側ダクト部71の出口開口部711での流速よりも、光学制御部材30と光源22との間の隙間90を通る空気の流速を速くすることが可能となるので、隙間90における温度上昇を効率的に低減できる。ただし、内側ダクト部71の出口開口部711の幅Δ3は、光学制御部材30と光源22との間の距離Δ1よりもわずかに大きい場合であっても、上述のように、空気の流れ方向で、内側ダクト部71の出口開口部711と隙間90との間の損失に起因して、内側ダクト部71の出口開口部711での流速よりも、光学制御部材30と光源22との間の隙間90を通る空気の流速が早くならない場合もありうる。
本実施形態では、カバー40の上端位置での流路(送風流路部分)の幅(光源22の前面基準)をΔ2とすると、光学制御部材30と光源22との間の距離Δ1と、内側ダクト部71の出口開口部711の幅Δ3との関係は、Δ1<Δ2<Δ3である。ただし、別の実施形態では、Δ1<Δ2≒Δ3であってもよいし、Δ1≒Δ2<Δ3であってもよいし、Δ1≒Δ2≒Δ3であってよい。なお、Δ1≒Δ2≒Δ3の場合であっても、内側ダクト部71が出口開口部711側で流速が高くなるようなテーパ状の形態を有するので、光学制御部材30と光源22との間の隙間90を通る空気の流速を効率的に高めることができる。
Also, when the width Δ3 of the outlet opening 711 of the inner duct portion 71 is slightly larger than the distance Δ1 between the optical control member 30 and the light source 22, the flow velocity at the outlet opening 711 of the inner duct portion 71 is Since it is possible to increase the flow velocity of the air passing through the gap 90 between the optical control member 30 and the light source 22, the temperature rise in the gap 90 can be efficiently reduced. However, even if the width Δ3 of the outlet opening 711 of the inner duct portion 71 is slightly larger than the distance Δ1 between the optical control member 30 and the light source 22, as described above, , due to the loss between the outlet opening 711 of the inner duct section 71 and the gap 90, the flow velocity at the outlet opening 711 of the inner duct section 71 is higher than the flow rate at the gap 90 between the optical control member 30 and the light source 22. It is possible that the air velocity through 90 will not increase.
In this embodiment, if the width of the flow path (blowing flow path portion) at the upper end position of the cover 40 (reference to the front surface of the light source 22) is Δ2, the distance Δ1 between the optical control member 30 and the light source 22 and the inner The relationship with the width Δ3 of the outlet opening 711 of the duct portion 71 is Δ1<Δ2<Δ3. However, in other embodiments, Δ1<Δ2≈Δ3, Δ1≈Δ2<Δ3, or Δ1≈Δ2≈Δ3. Even in the case of Δ1≈Δ2≈Δ3, the inner duct portion 71 has a tapered shape such that the flow velocity increases on the exit opening portion 711 side. The flow velocity of air passing through the gap 90 can be efficiently increased.

また、光学制御部材30と光源22との間の距離Δ1が小さくなると、ヒートシンク10等のような、光学制御部材30と光源22の間に介する部品を伝う熱伝導に起因して、光学制御部材30の取り付け部である固定部32(すなわちネジ孔32BB付近)が材料の耐熱温度を超え、溶損するおそれがある。 Further, when the distance Δ1 between the optical control member 30 and the light source 22 becomes small, the heat conduction through the parts such as the heat sink 10 between the optical control member 30 and the light source 22 causes the optical control member The fixing portion 32 (that is, the vicinity of the screw hole 32BB), which is the mounting portion of the fixing portion 30, may exceed the heat-resistant temperature of the material and be melted.

この点、本実施形態によれば、上述のように、取付部111に向けて開口する外側ダクト部72が設けられる。従って、光学制御部材30の固定部32は、ファン50により隙間90に流される空気によって冷却できる。これにより、光学制御部材30の固定部32が溶損する可能性も低減できる。 In this respect, according to the present embodiment, the outer duct portion 72 that opens toward the mounting portion 111 is provided as described above. Therefore, the fixed portion 32 of the optical control member 30 can be cooled by the air flowed through the gap 90 by the fan 50 . As a result, the possibility that the fixed portion 32 of the optical control member 30 will be melted can be reduced.

以上、各実施形態について詳述したが、特定の実施形態に限定されるものではなく、特許請求の範囲に記載された範囲内において、種々の変形及び変更が可能である。また、前述した実施形態の構成要素を全部又は複数を組み合わせることも可能である。 Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes are possible within the scope described in the claims. It is also possible to combine all or more of the constituent elements of the above-described embodiments.

例えば、上述した実施形態では、外側ダクト部72が設けられるが、外側ダクト部72は省略されてもよい。
また、上述した実施形態では、ヒートシンク10や光学制御部材30等は、左右方向(車両幅方向)の中心に関して左右対称な構成を有するが、左右で若干の相違を有してもよいし、完全に非対称な構成を有してもよい。
For example, although the outer duct portion 72 is provided in the embodiments described above, the outer duct portion 72 may be omitted.
In the above-described embodiment, the heat sink 10, the optical control member 30, and the like have a symmetrical configuration with respect to the center in the left-right direction (vehicle width direction). may have an asymmetrical configuration.

また、上述した実施形態では、カバー40の下部が、内側ダクト部71から隙間90までの間の送風流路の一部を形成するが、フロントカバー60の上端を上側に延長することで、カバー40の下部の機能が実現されてもよい。この場合、位置決め孔42A(位置決め孔32BA及び位置決め孔24A)の位置は、他の位置(例えばカバー40の上部等)に設定されてもよい。 Further, in the above-described embodiment, the lower portion of the cover 40 forms part of the airflow passage from the inner duct portion 71 to the gap 90, but by extending the upper end of the front cover 60 upward, the cover The functionality below 40 may be implemented. In this case, the positions of the positioning holes 42A (the positioning holes 32BA and the positioning holes 24A) may be set to other positions (for example, the top of the cover 40).

1 灯具ユニット
10 ヒートシンク
11 ベース部
11A 位置決めピン
11B ネジ螺合孔
12 放熱フィン
20 光源装置
21 熱伝達部材
22 光源
22A 基板
22B 発光領域
23 接続部
23A 開口部
23B コネクタ接続部
24A 位置決め孔
24B ネジ孔
30 光学制御部材
31 複合光学レンズ
31B 入射面
32 固定部
32A 脚部
32B 基部
32BA 位置決め孔
32BB ネジ孔
40 カバー
41 覆い部
41A 切欠き部
42 フランジ部
42A 位置決め孔
42B ネジ孔
70 ダクト
71 内側ダクト部
711 出口開口部
72 外側ダクト部
90 隙間
N ネジ
BT 締結部材
101L、101R 車両用の前照灯
102 車両
1 Lamp Unit 10 Heat Sink 11 Base Part 11A Positioning Pin 11B Threaded Hole 12 Radiation Fin 20 Light Source Device 21 Heat Transfer Member 22 Light Source 22A Board 22B Light Emitting Area 23 Connection Part 23A Opening 23B Connector Connection Part 24A Positioning Hole 24B Screw Hole 30 Optical control member 31 Compound optical lens 31B Entrance surface 32 Fixing part 32A Leg part 32B Base part 32BA Positioning hole 32BB Screw hole 40 Cover 41 Cover part 41A Notch part 42 Flange part 42A Positioning hole 42B Screw hole 70 Duct 71 Inner duct part 711 Exit Opening portion 72 Outer duct portion 90 Gap N Screw BT Fastening members 101L and 101R Vehicle headlamp 102 Vehicle

Claims (5)

レーザ光源と、
前記レーザ光源からの光の入射面を有する光学部品と、
送風機と、
一端が前記送風機に連通し、他端が前記レーザ光源に向けて開口する第1ダクト部とを備え、
前記第1ダクト部は、前記一端側から前記他端側に向けて窄まるテーパ状の形態を有し、
前記レーザ光源の光軸方向において、前記第1ダクト部の前記他端側の出口開口部の幅は、前記レーザ光源と前記光学部品との間の離間距離よりも大きく、
前記第1ダクト部は前記出口開口部と入口開口部とを有し、
前記出口開口部は、前記レーザ光源と前記光学部品との間の隙間に向くように配置され、
前記入口開口部から前記出口開口部に向かう空気の流れが直線的である、車両用灯具。
a laser light source;
an optical component having an incident surface for light from the laser light source;
a blower;
a first duct portion having one end communicating with the blower and the other end opening toward the laser light source;
The first duct portion has a tapered form that narrows from the one end side toward the other end side ,
In the optical axis direction of the laser light source, the width of the outlet opening on the other end side of the first duct portion is larger than the separation distance between the laser light source and the optical component,
said first duct portion having said outlet opening and an inlet opening;
the exit aperture is positioned to face a gap between the laser light source and the optical component;
A vehicular lamp , wherein air flows linearly from the entrance opening to the exit opening .
フィンを備え、溝部が形成される放熱部材と、
前記溝部を覆うカバー部材を更に備え、
前記第1ダクト部は、前記溝部と前記カバー部材とにより形成される、請求項1に記載の車両用灯具。
a heat dissipating member having fins and having grooves;
Further comprising a cover member covering the groove,
2. The vehicle lamp according to claim 1, wherein said first duct portion is formed by said groove portion and said cover member.
前記光学部品を前記放熱部材に取り付ける固定具と、
前記送風機と前記固定具との間に延在する第2ダクト部とを更に備える、請求項2に記載の車両用灯具。
a fixture that attaches the optical component to the heat dissipation member;
3. The vehicle lamp according to claim 2, further comprising a second duct portion extending between said blower and said fixture.
前記第1ダクト部及び前記第2ダクト部の少なくともいずれか一方は、少なくとも一部の区間において、前記レーザ光源の光軸に沿った方向に視て、前記一端側から前記他端側に向かって幅が狭くなる、請求項3に記載の車両用灯具。 At least one of the first duct portion and the second duct portion, in at least a part of the section, extends from the one end side toward the other end side when viewed in the direction along the optical axis of the laser light source. 4. The vehicle lamp according to claim 3, wherein the width is narrowed. レーザ光源と、
前記レーザ光源からの光の入射面を有する光学部品と、
送風機と、
一端が前記送風機に連通し、他端が前記レーザ光源に向けて開口する第1ダクト部とを備え、
前記第1ダクト部は、前記一端側から前記他端側に向けて窄まるテーパ状の形態を有し、
前記レーザ光源の光軸方向において、前記第1ダクト部の前記他端側の開口部の幅は、前記レーザ光源と前記光学部品との間の離間距離よりも大きく、
フィンを備え、溝部が形成される放熱部材と、
前記溝部を覆うカバー部材を更に備え、
前記第1ダクト部は、前記溝部と前記カバー部材とにより形成される、車両用灯具。
a laser light source;
an optical component having an incident surface for light from the laser light source;
a blower;
a first duct portion having one end communicating with the blower and the other end opening toward the laser light source;
The first duct portion has a tapered form that narrows from the one end side toward the other end side ,
In the optical axis direction of the laser light source, the width of the opening on the other end side of the first duct portion is larger than the separation distance between the laser light source and the optical component,
a heat dissipating member having fins and having grooves;
Further comprising a cover member covering the groove,
The vehicle lamp , wherein the first duct portion is formed by the groove portion and the cover member .
JP2018233613A 2018-12-13 2018-12-13 vehicle lamp Active JP7217934B2 (en)

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JP7271078B2 (en) 2016-09-30 2023-05-11 積水化学工業株式会社 Air conditioning drain pipe
JP7343960B2 (en) 2016-09-30 2023-09-13 積水化学工業株式会社 Air conditioning drain pipe and method for manufacturing air conditioning drain pipe

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JP5553708B2 (en) * 2010-08-11 2014-07-16 スタンレー電気株式会社 Lighting device and heat sink thereof

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JP2017062885A (en) 2015-09-24 2017-03-30 スタンレー電気株式会社 Vehicular lighting fixture
US20180266646A1 (en) 2017-03-16 2018-09-20 Valeo Vision Optical module including a heat sink equipped with a vent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7271078B2 (en) 2016-09-30 2023-05-11 積水化学工業株式会社 Air conditioning drain pipe
JP7343960B2 (en) 2016-09-30 2023-09-13 積水化学工業株式会社 Air conditioning drain pipe and method for manufacturing air conditioning drain pipe

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