JPH065101A - Head lamp for automobile - Google Patents

Head lamp for automobile

Info

Publication number
JPH065101A
JPH065101A JP4162937A JP16293792A JPH065101A JP H065101 A JPH065101 A JP H065101A JP 4162937 A JP4162937 A JP 4162937A JP 16293792 A JP16293792 A JP 16293792A JP H065101 A JPH065101 A JP H065101A
Authority
JP
Japan
Prior art keywords
reflector
arc tube
light
arc
headlamp
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP4162937A
Other languages
Japanese (ja)
Inventor
Hiroyuki Serizawa
啓之 芹澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
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 Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Priority to JP4162937A priority Critical patent/JPH065101A/en
Publication of JPH065101A publication Critical patent/JPH065101A/en
Pending legal-status Critical Current

Links

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
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/168—Incandescent light sources, e.g. filament or halogen lamps having a filament arranged transversally to the optical axis of the illuminating device
    • 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
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • 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
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate 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
    • 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
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F21S41/435—Hoods or cap-shaped
    • 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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/155—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having inclined and horizontal cutoff lines

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PURPOSE:To provide the head lamp for automobile having the excellent visibility by using an arc tube as a light source. CONSTITUTION:A head lamp for automobile is provided with a parabolic reflector 11 and an arc tube 21 provided as a light source in a nearly focus position of the parabolic reflector 11, and the light emitted from the arc tube 21 is reflected forward for flux distribution through the parabolic reflector 11. The parabolic reflector 11 is arranged so that the reflecting surface thereof directs downward so as to reflect the light, which is emitted from the arc tube 21, downward. A mirror 24 for reflecting the light, which is reflected by the reflector 11, forward is provided under the parabolic reflector 11. The arc tube 21 is arranged so that the discharge axis passing the counter electrode of the arc tube 21 is directed in the horizontal direction nearly crossing the center axis L of the reflector 11 and that the arc of the arc tube 21 at the time of stabilized discharge is positioned at a position near the focus of the reflector 11 to form the image of an arc to be appeared in the flux distribution pattern under the electing condition and improve the (distance) visibility.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は自動車用ヘッドランプに
係り、特にアークチューブを光源とする自動車用ヘッド
ランプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile headlamp, and more particularly to an automobile headlamp using an arc tube as a light source.

【０００２】[0002]

【従来の技術】放電バルブは演色性及び発光効率が良好
で、しかも耐久性に優れているため、ヘッドランプの光
源として最近注目されている。図１２は放電バルブのア
ークチューブを示し、アークチューブの放電部を拡大し
て示した断面図である。アークチューブ１は、始動用稀
ガス等の封入された密閉ガラス球２内に一対の電極３，
３が対設され、電極３，３間のアーク４によって発光す
る構造となっている。符号７は電極３，３を通る放電軸
を示す。また図１３は放電バルブを光源とするヘッドラ
ンプを示しており、リフレクター５のバルブ挿着孔６に
は放電軸７を前後方向に向けて放電バルブが挿着されて
いる。符号８はランプボディ、符号９はリフレクター５
における反射光を所定方向に拡散配光するステップの形
成されたレンズである。2. Description of the Related Art Discharge bulbs have recently attracted attention as a light source for headlamps because they have good color rendering properties and luminous efficiency and are excellent in durability. FIG. 12 shows an arc tube of a discharge bulb, and is an enlarged sectional view showing a discharge part of the arc tube. The arc tube 1 includes a pair of electrodes 3 in a closed glass bulb 2 in which a rare gas for starting is sealed.
3 are arranged opposite to each other, and light is emitted by the arc 4 between the electrodes 3 and 3. Reference numeral 7 indicates a discharge axis passing through the electrodes 3 and 3. Further, FIG. 13 shows a headlamp using a discharge bulb as a light source, and a discharge bulb is inserted into the bulb insertion hole 6 of the reflector 5 with the discharge shaft 7 oriented in the front-rear direction. Reference numeral 8 is a lamp body, and reference numeral 9 is a reflector 5.
It is a lens formed with a step of diffusing and distributing the reflected light in a predetermined direction.

【０００３】[0003]

【発明の解決しようとする課題】従来のヘッドランプで
は、放電軸７を前後方向に向けてアークチューブ１が配
置（縦配置という）されており、光源となるアークが前
後方向にｄ（図１２参照）という長さをもっているた
め、それだけリフレクター５によって反射される光は種
々の方向に反射されることとなって、レンズステップに
よる配光設計が難しいとか、配光上のロスが多い等の問
題があった。In the conventional headlamp, the arc tube 1 is arranged (referred to as a vertical arrangement) with the discharge shaft 7 oriented in the front-rear direction, and the arc serving as the light source is arranged in the front-rear direction d (see FIG. 12). Since the light reflected by the reflector 5 is reflected in various directions, the light distribution design by the lens step is difficult, and there are many losses in the light distribution. was there.

【０００４】そこで図１４に示されるように、アークチ
ューブ１を左右方向に配置（横配置）することにより、
レンズの配光設計を簡単化できるヘッドランプが実願平
２−４０２６５１において提案されている。しかし光源
であるアークチューブを縦配置とする従来のヘッドラン
プおよびアークチューブを横配置する前記したヘッドラ
ンプでは、点灯時にアークチューブ内の対向電極３，３
間に生成されるアーク４が、図１５において符号Ｌを放
物面リフレクター５の中心軸とすると、符号４Ａで示さ
れるように前方の配光スクリーン上に結像する。このた
め、ヘッドランプによって形成される配光パターン上に
現われるアークの像は、図１６に示すように下方に凸の
湾曲形状（破線で示す）となり、配光パターンの最も光
量の大きい領域であるホットゾーンおよびクリアカット
ラインの上縁部に暗い領域（斜線で示す）が形成され
て、特に遠方の視認性が悪いという問題があった。Therefore, as shown in FIG. 14, by arranging the arc tube 1 in the left-right direction (horizontal arrangement),
A headlamp that can simplify the light distribution design of a lens is proposed in Japanese Patent Application No. 2-402651. However, in the conventional headlamp in which the arc tube which is the light source is vertically arranged and the above-described headlamp in which the arc tube is horizontally arranged, the counter electrodes 3 and 3 in the arc tube are lit when the lamp is lit.
The arc 4 generated in between forms an image on the front light distribution screen as shown by reference numeral 4A, where L is the central axis of the parabolic reflector 5 in FIG. Therefore, the image of the arc appearing on the light distribution pattern formed by the headlamp has a curved shape convex downward (indicated by a broken line) as shown in FIG. 16, which is the region where the light amount is the largest. There is a problem that a dark area (shown by diagonal lines) is formed at the upper edge of the hot zone and the clear cut line, and visibility is particularly poor at a distance.

【０００５】本発明は前記従来技術の問題点に鑑みなさ
れたもので、その目的は、アークチューブを光源とする
視認性のよい自動車用ヘッドランプを提供することにあ
る。The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a headlamp for an automobile, which uses an arc tube as a light source and has good visibility.

【０００６】[0006]

【課題を解決するための手段】前記目的を達成するため
に、請求項１では、放物面リフレクターと、前記放物面
リフレクターの略焦点位置に設けられた光源であるアー
クチューブとを備え、アークチューブの発光を放物面リ
フレクターを介して前方に反射配光する自動車用ヘッド
ランプにおいて、前記リフレクターを、アークチューブ
の発する光を下方に反射するべく反射面を下向きにして
配置するとともに、前記リフレクターの下方位置に、リ
フレクターで反射された光を前方に反射するミラーを設
け、前記アークチューブを、アークチューブの対向電極
を通る放電軸を前記リフレクターの中心軸と略直交する
水平方向に向け、かつアークチューブの安定放電時のア
ークがリフレクターの焦点近傍位置となるように配置す
るようにしたものである。In order to achieve the above object, a parabolic reflector is provided in the present invention, and an arc tube which is a light source provided at a substantially focal position of the parabolic reflector, In a vehicle headlamp that reflects and distributes the light emitted from the arc tube forward through a parabolic reflector, the reflector is arranged with the reflecting surface facing downward to reflect the light emitted by the arc tube downward, and At the lower position of the reflector, a mirror that reflects the light reflected by the reflector forward is provided, and the arc tube is directed in a horizontal direction in which the discharge axis passing through the counter electrode of the arc tube is substantially orthogonal to the central axis of the reflector, Also, the arc tube is arranged so that the arc during stable discharge is near the focal point of the reflector. A.

【０００７】また請求項２では、放物面リフレクター
と、前記放物面リフレクターの略焦点位置に設けられた
光源であるアークチューブとを備え、アークチューブの
発光を放物面リフレクターを介して前方に反射配光する
自動車用ヘッドランプにおいて、前記リフレクターを、
アークチューブの発する光を上方に反射するべく反射面
を上向きにして配置するとともに、前記リフレクターの
上方位置に、リフレクターで反射された光を前方に反射
するミラーを設け、前記アークチューブを、アークチュ
ーブの対向電極を通る放電軸を前記リフレクターの中心
軸と略直交する水平方向に向け、かつアークチューブの
安定放電時のアークがリフレクターの焦点近傍位置とな
るように配置するようにしたものである。According to a second aspect of the present invention, there is provided a parabolic reflector and an arc tube which is a light source provided at a substantially focal position of the parabolic reflector, and the light emitted from the arc tube is forwarded through the parabolic reflector. In an automobile headlamp that reflects and distributes light to the reflector,
The reflecting surface is arranged upward so as to reflect the light emitted by the arc tube upward, and a mirror for reflecting the light reflected by the reflector forward is provided above the reflector, and the arc tube is defined as the arc tube. The discharge axis passing through the counter electrode is directed in a horizontal direction substantially orthogonal to the central axis of the reflector, and the arc is arranged so that the arc during stable discharge of the arc tube is near the focal point of the reflector.

【０００８】また請求項３では、請求項１又は２記載の
自動車用ヘッドランプにおいて、前記ミラーを水平方向
および垂直方向に傾動可能に支持するようにしたもので
ある。According to a third aspect of the present invention, in the vehicle headlamp according to the first or second aspect, the mirror is supported so as to be tiltable in a horizontal direction and a vertical direction.

【０００９】[0009]

【作用】放電ランプの放電部をヘッドランプの光軸と直
交する水平方向、いわゆる横置きとすることによって光
源（アーク）のヘッドランプの光軸前後方向の長さが短
くなり、それだけレンズ出射光の配光制御がしやすい。
またヘッドランプの点灯時、即ちアークチューブの安定
放電時に対向電極間に生成される上方凸形状のアーク
は、放物面リフレクターで反射されて倒立アーク像とな
るが、さらにミラーで反射されることにより、配光パタ
ーン上には正立アーク像としてあらわれる。When the discharge part of the discharge lamp is placed in the horizontal direction orthogonal to the optical axis of the headlamp, that is, in the horizontal direction, the length of the light source (arc) in the front-rear direction of the optical axis of the headlamp is shortened, and the light emitted from the lens is reduced accordingly. It is easy to control the light distribution.
Also, when the headlamp is lit, that is, when the arc tube is stably discharged, the upward convex arc generated between the opposing electrodes is reflected by the parabolic reflector to form an inverted arc image, which is further reflected by the mirror. Thus, it appears as an upright arc image on the light distribution pattern.

【００１０】[0010]

【実施例】次に、本発明の実施例を図面に基づいて説明
する。図１〜図５は本発明の一実施例である自動車用ヘ
ッドランプを示すもので、図１はサブビーム形成用の自
動車用ヘッドランプの縦断面図、図２は同ヘッドランプ
の要部である光源周辺の斜視図、図３はリフレクターで
の反射光を前方に反射するミラーの正面図、図４は左右
拡散反射面の形状を示す断面図、図５は同ヘッドランプ
の配光パターンを示す図である。Embodiments of the present invention will now be described with reference to the drawings. 1 to 5 show an automobile headlamp which is an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of an automobile headlamp for forming a sub beam, and FIG. 2 is a main part of the same. FIG. 3 is a perspective view around the light source, FIG. 3 is a front view of a mirror that reflects the light reflected by the reflector forward, FIG. 4 is a sectional view showing the shape of the left and right diffuse reflection surfaces, and FIG. 5 is a light distribution pattern of the same headlamp. It is a figure.

【００１１】これらの図において、符号１０はランプボ
ディで、ランプボディ１０の内側には放物面形状のリフ
レクター１１が上向きに設けられている。リフレクター
１１は、回転放物面形状で、リフレクター１１の内側壁
に設けられたバルブ挿着孔１１ａに挿着された放電バル
ブ２０のアークチューブ２１が水平に延出し、リフレク
ター１１の回転中心軸Ｌと直交し、アークチューブ２１
の放電部２１ａは回転中心軸Ｌ上にあるリフレクター１
１の焦点位置Ｆに配置されている。そしてアークチュー
ブ２１の放電部２１ａの発光がリフレクター１１で反射
されて略平行な上方に向かう光となる。リフレクター１
１の上方には、斜め４５度下向きに傾斜するミラー２４
が設けられており、リフレクター１１で反射し上方に向
かう光はこのミラー２４で反射され、ランプボデイ１０
の前面開口部に設けられた前面レンズ２７を透過して前
方に配光される。In these drawings, reference numeral 10 is a lamp body, and a parabolic reflector 11 is provided inside the lamp body 10 so as to face upward. The reflector 11 has a paraboloidal shape of rotation, and the arc tube 21 of the discharge bulb 20 inserted into the bulb insertion hole 11a provided in the inner wall of the reflector 11 extends horizontally, and the rotation center axis L of the reflector 11 Orthogonal to the arc tube 21
The discharge part 21a of the reflector 1 is located on the central axis L of rotation.
The focus position F is 1. Then, the light emitted from the discharge portion 21a of the arc tube 21 is reflected by the reflector 11 to become substantially parallel upward light. Reflector 1
1, a mirror 24 tilted at an angle of 45 degrees downward.
The light reflected by the reflector 11 and traveling upward is reflected by the mirror 24, and the lamp body 10
The light is transmitted to the front through the front lens 27 provided in the front opening.

【００１２】ミラー２４の上方中央部には、図３，４に
示されるように、水平断面波型の左右拡散反射面２５が
形成されており、この拡散反射面２５で反射した光は左
右方向に拡散されて、図５符号Ａで示す左右に長い拡散
配光パターンエリアを形成する。またミラー２４の左右
拡散反射面２５以外の領域２６で反射した光は略平行に
反射して、配光スクリーン上の水平線Ｈ近傍のホットゾ
ーンエリアＢを形成する。As shown in FIGS. 3 and 4, left and right diffuse reflection surfaces 25 having a horizontal cross-sectional wave shape are formed in the upper central portion of the mirror 24, and the light reflected by the diffuse reflection surfaces 25 is directed in the left and right directions. To form a diffused light distribution pattern area that is long in the left and right directions as indicated by reference character A in FIG. Further, the light reflected by the region 26 other than the left and right diffuse reflection surfaces 25 of the mirror 24 is reflected substantially in parallel to form a hot zone area B near the horizontal line H on the light distribution screen.

【００１３】ミラー２４は、一対のエイミングスクリュ
ー３２，３３と１個の玉継手３４からなるエイミング機
構により、互いに直交して延びる水平軸Ｌｘ，垂直軸Ｌ
ｙ回りに傾動できる構造となっている。即ち、スクリュ
ー３２，３３はランプボデイ１０に固定された雌ねじ部
材３５，３６に螺合してランプボデイ１０を貫通し、各
々のスクリュー先端部に形成された玉部がミラー２４の
背面に突出形成された軸受３７，３８に支承されてい
る。このためスクリュー３２，３３を回動操作すること
によってミラー２４を傾動させて、図５に示す配光パタ
ーンを上下左右方向に移動調整できる。The mirror 24 has a horizontal axis Lx and a vertical axis L extending orthogonally to each other by an aiming mechanism composed of a pair of aiming screws 32 and 33 and one ball joint 34.
It has a structure that can be tilted around y. That is, the screws 32 and 33 are threadedly engaged with the female screw members 35 and 36 fixed to the lamp body 10 to penetrate the lamp body 10, and the balls formed at the tip ends of the respective screws are formed on the rear surface of the mirror 24. The bearings 37 and 38 are supported. Therefore, by rotating the screws 32 and 33, the mirror 24 can be tilted, and the light distribution pattern shown in FIG. 5 can be moved and adjusted in the vertical and horizontal directions.

【００１４】なお符号２８は、放電バルブ２０のアーク
チューブ２１の前面側を覆うように配置された横断面円
弧形の直射光遮光用のシェードで、グレア光の発生を抑
制するためのものである。符号２９は、放電バルブ２０
に接続され、アークチューブ２１に安定した放電を行わ
しめるための点灯回路収容ユニットである。本実施例で
は、アークが正面視して横長となるようにアークチュー
ブ２１を配置しているので、ヘッドランプの前後方向の
長さが短くなり、それだけレンズステップによる出射光
の方向制御が簡単である。Reference numeral 28 is a shade for shielding the direct light which has an arc-shaped cross section and is arranged so as to cover the front side of the arc tube 21 of the discharge bulb 20 and is for suppressing the generation of glare light. is there. Reference numeral 29 is the discharge bulb 20.
Is a lighting circuit accommodating unit that is connected to the arc tube 21 for stable discharge in the arc tube 21. In this embodiment, since the arc tube 21 is arranged so that the arc is horizontally long when viewed from the front, the length of the headlamp in the front-rear direction is shortened, and the direction control of the emitted light by the lens step is simpler. is there.

【００１５】またアークチューブ２１の放電により生成
される上方凸型に湾曲するアークは、リフレクター１１
で反射されて倒立像となるが、さらにミラー２４で反射
されることにより、図５に示されるように配光パターン
上に正立像として現われるので、従来の配光パターン中
のホットゾーンにおいて見られる様な影（図１６の斜線
部参照）となる部分がなく、それだけ視認性、特に遠方
視認性に優れた配光パターンとなる。The upwardly convexly curved arc generated by the discharge of the arc tube 21 is reflected by the reflector 11.
Although it is reflected by, and becomes an inverted image, by being further reflected by the mirror 24, it appears as an erect image on the light distribution pattern as shown in FIG. 5, so that it is seen in the hot zone in the conventional light distribution pattern. There is no such a shadow (see the shaded area in FIG. 16), and the light distribution pattern has excellent visibility, particularly distance visibility.

【００１６】図６および図７は、前記実施例のヘッドラ
ンプに使用されるミラーの他の例を示すもので、ミラー
２４の上側左右位置には、垂直軸２７ａ回りに傾動可能
な一対の分割ミラー２７ｂ，２７ｂが設けられている。
分割ミラー２７ｂ，２７ｂはそれぞれ反射された光が左
右方向外方に向かうように傾斜して配置されており、こ
の分割ミラーでの反射光によって、図５符号Ａによって
示される左右に長い拡散配光パターンエリアが形成され
る。なお符号２７ｃはミラー２７ｂを傾動させるための
駆動モータで、このモータ２７ｃを駆動させて分割ミラ
ー２７ｂを傾動させ、拡散配光パターンエリアＡの拡散
度を調整できる。FIGS. 6 and 7 show another example of the mirror used in the headlamp of the above-described embodiment. A pair of splits which can be tilted about the vertical axis 27a are provided at the upper left and right positions of the mirror 24. Mirrors 27b and 27b are provided.
The split mirrors 27b and 27b are arranged so that the reflected light is inclined outward in the left-right direction. The reflected light from the split mirrors causes the diffused light distribution, which is long in the left and right directions, as indicated by reference symbol A in FIG. A pattern area is formed. Reference numeral 27c is a drive motor for tilting the mirror 27b. By driving this motor 27c to tilt the split mirror 27b, the degree of diffusion of the diffused light distribution pattern area A can be adjusted.

【００１７】図８および図９は本発明の第２の実施例の
ヘッドランプを示すもので、図８はヘッドランプの正面
図、図９は同ヘッドランプの縦断面図（図８に示す線IX
−IXに沿う断面図）である。これらの図において、符号
４０は放物面形状のリフレクター１１とミラー２４とが
一体化された構造のリフレクターユニットである。放物
面リフレクター１１は前記第１の実施例に示すリフレク
ターと同一形状で、このリフレクター１１の中心軸Ｌと
直交する様に放電バルブ２０が設けられ、放電バルブ２
０のアークチュブ２１の放電部がリフレクター１１の焦
点位置Ｆ1に配置されている。ミラー２４は前記第１の
実施例の場合とは異なり、拡散反射面２５の形成されて
いない平面鏡だけによって構成されている。そしてアー
クチューブ２１の発光はリフレクター１１とミラー２４
に反射されてレンズ２６を透過して前方に配光され、図
５に示す配光パターンの主としてホットゾーンエリアＢ
を形成する。そしてホットゾーンエリアＢ内に現われる
アークの像は上に凸なる形状となる。FIGS. 8 and 9 show a headlamp according to a second embodiment of the present invention. FIG. 8 is a front view of the headlamp, and FIG. 9 is a vertical sectional view of the headlamp (line shown in FIG. 8). IX
It is a cross-sectional view taken along line IX). In these drawings, reference numeral 40 is a reflector unit having a structure in which the parabolic reflector 11 and the mirror 24 are integrated. The parabolic reflector 11 has the same shape as the reflector shown in the first embodiment, and the discharge bulb 20 is provided so as to be orthogonal to the central axis L of the reflector 11, and the discharge bulb 2 is provided.
The discharge part of the arc tube 21 of 0 is arranged at the focal position F 1 of the reflector 11. Unlike the case of the first embodiment, the mirror 24 is composed only of a plane mirror on which the diffuse reflection surface 25 is not formed. The light emitted from the arc tube 21 is reflected by the reflector 11 and the mirror 24.
The light is distributed to the front through the lens 26 and is mainly reflected in the hot zone area B of the light distribution pattern shown in FIG.
To form. Then, the image of the arc appearing in the hot zone area B has a convex shape.

【００１８】リフレクター１１の前縁部には、アークチ
ューブ２１を上下に挾むように一対の放物面形状の第２
のリフレクター４２，４２が一体化されている。この第
２のリフレクター４２は、反射した光が上下方向には平
行光となり、左右方向には拡散光となる反射面をもち、
図５に示す配光パターンの主として左右拡散エリアＡを
形成する。そしてアークチューブ２１内の電極が第２の
リフレクター４２の中心軸上に置かれている場合、この
電極を含みリフレクター４２の中心軸に垂直な面ａより
も前方の部分での反射光パターンは、殆どが上曲がり
（斜めのものもあるが）になることが確認されており、
左右拡散エリアＡ内に現われるアークの像は上に凸形状
となる。なおこの第２のリフレクター４２の詳細な形状
については特公昭４５−７３９７号に開示されている。At the front edge of the reflector 11, a pair of paraboloidal second arc tubes 21 are sandwiched vertically.
The reflectors 42, 42 are integrated. The second reflector 42 has a reflection surface in which the reflected light becomes parallel light in the vertical direction and diffused light in the horizontal direction,
The left and right diffusion areas A of the light distribution pattern shown in FIG. 5 are mainly formed. When the electrode in the arc tube 21 is placed on the central axis of the second reflector 42, the reflected light pattern in the portion in front of the plane a including this electrode and perpendicular to the central axis of the reflector 42 is: It has been confirmed that most of them will bend upward (though there are some that are diagonal),
The image of the arc appearing in the left and right diffusion areas A has an upward convex shape. The detailed shape of the second reflector 42 is disclosed in JP-B-45-7397.

【００１９】またリフレクターユニット４０は一対のエ
イミングスクリュー３２，３３と１個の玉継手からなる
エイミング機構によりランプボデイ１０に対し傾動可能
に支持されており、エイミングスクリュー３２，３３を
回動操作することによりヘッドランプの照射軸を上下左
右方向に傾動調整できる。その他は前記第１の実施例と
同一であり、同一の符号を付すことによりその説明は省
略する。The reflector unit 40 is tiltably supported with respect to the lamp body 10 by an aiming mechanism composed of a pair of aiming screws 32 and 33 and a ball joint, and the aiming screws 32 and 33 can be rotated. With this, the irradiation axis of the headlamp can be tilted vertically and horizontally. The other points are the same as those in the first embodiment, and the description thereof will be omitted by giving the same reference numerals.

【００２０】図１０は本発明の第３の実施例のヘッドラ
ンプの要部構成を示す図である。本実施例では、リフレ
クター１１とミラー２４との間に配光制御用のレンズ２
７が配置された構造となっている。符号２７Ａはランプ
ボデイ（図示せず）の前面開口部に組付けられた透明カ
バーで、出射光の光路の最終的微調整や見栄えの観点か
ら設けられている。そしてエイミングによるリフレクタ
ー１１の傾動時に、リフレクター１１とレンズ２７とミ
ラー２４が一体に動くので、レンズ２７におけるレンズ
ステップの設計が容易である。即ち、先の実施例では、
エイミング（リフレクターの傾動調整）に伴ってレンズ
２７に対する入射光の角度が変化し、このためエイミン
グ（リフレクターの傾動）調整を考慮したレンズステッ
プの設計が必要であるが、この第３の実施例ではそのよ
うな点を考慮しなくてもよい。FIG. 10 is a diagram showing a main configuration of a headlamp according to the third embodiment of the present invention. In this embodiment, the lens 2 for controlling light distribution is provided between the reflector 11 and the mirror 24.
7 is arranged. Reference numeral 27A is a transparent cover assembled in the front opening of the lamp body (not shown), and is provided from the viewpoint of final fine adjustment of the optical path of the emitted light and appearance. When the reflector 11 tilts due to aiming, the reflector 11, the lens 27, and the mirror 24 move integrally, so that the lens step of the lens 27 can be easily designed. That is, in the previous embodiment,
The angle of the incident light with respect to the lens 27 changes with the aiming (adjustment of the tilt of the reflector). Therefore, it is necessary to design the lens step in consideration of the adjustment of the aiming (tilt of the reflector). However, in the third embodiment. It is not necessary to consider such a point.

【００２１】なお前記した２つの実施例では、アークチ
ューブ２１の下方にリフレクター１１を配置し、リフレ
クター１１の上方にミラー２４を配置した構造となって
いるが、図１１に示されるように、アークチューブ２１
の上方にリフレクター１１を配置し、リフレクター１１
の下方にミラー２４を配置する構造であってもよい。In the above-mentioned two embodiments, the reflector 11 is arranged below the arc tube 21 and the mirror 24 is arranged above the reflector 11. However, as shown in FIG. Tube 21
The reflector 11 is arranged above the
It may be a structure in which the mirror 24 is arranged below.

【００２２】[0022]

【発明の効果】以上の説明から明らかなように、本発明
に係る自動車用ヘッドランプによれば、放電ランプの放
電部をヘッドランプの光軸と直交する水平方向、いわゆ
る横置きとすることによって光源（アーク）のヘッドラ
ンプの光軸前後方向の長さが短くなり、それだけレンズ
出射光の方向制御がしやすく、ヘッドランプの製造が容
易となる。As is apparent from the above description, according to the headlamp for an automobile of the present invention, the discharge portion of the discharge lamp is arranged in the horizontal direction orthogonal to the optical axis of the headlamp, that is, so-called horizontal placement. The length of the light source (arc) in the front-back direction of the optical axis of the headlamp is shortened, so that the direction of the light emitted from the lens can be easily controlled, and the headlamp can be easily manufactured.

【００２３】またヘッドランプの点灯時、即ちアークチ
ューブの安定放電時に対向電極間に生成される上方凸形
状のアークは、放物面リフレクターで反射されて倒立ア
ーク像となるが、さらにミラーで反射されることによ
り、配光パターン上には正立アーク像としてあらわれる
ので、従来のヘッドランプの配光パターンの様にパター
ン上縁部に影が現われることがなく、視認性、特に遠方
視認性に優れたヘッドランプが得られる。The upward convex arc generated between the opposing electrodes when the headlamp is turned on, that is, when the arc tube is stably discharged, is reflected by the parabolic reflector to form an inverted arc image, which is further reflected by the mirror. By doing so, it appears as an upright arc image on the light distribution pattern, so there is no shadow on the upper edge of the pattern unlike the light distribution pattern of conventional headlamps, and visibility, especially distant visibility is improved. An excellent headlamp can be obtained.

【００２４】また請求項３では、ミラーを傾動調整する
ことによって、ヘッドランプの照射方向を簡単に調整で
きる。In the third aspect, the irradiation direction of the headlamp can be easily adjusted by adjusting the tilt of the mirror.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１の実施例である自動車用ヘッドラ
ンプの縦断面図FIG. 1 is a vertical cross-sectional view of a vehicle headlamp that is a first embodiment of the present invention.

【図２】同ヘッドランプの要部斜視図FIG. 2 is a perspective view of a main part of the headlamp.

【図３】同ヘッドランプの要部であるミラーの正面図FIG. 3 is a front view of a mirror, which is a main part of the headlamp.

【図４】左右拡散反射面の形状を示す断面図FIG. 4 is a cross-sectional view showing the shapes of left and right diffuse reflection surfaces.

【図５】同ヘッドランプの配光パターンを示す図FIG. 5 is a diagram showing a light distribution pattern of the headlamp.

【図６】ミラーの他の例を示す斜視図FIG. 6 is a perspective view showing another example of the mirror.

【図７】図６に示すミラーを裏側から見た斜視図7 is a perspective view of the mirror shown in FIG. 6 viewed from the back side.

【図８】本発明の第２の実施例である自動車用ヘッドラ
ンプの正面図FIG. 8 is a front view of a vehicle headlamp that is a second embodiment of the present invention.

【図９】同ヘッドランプの縦断面図（図８に示す線IX−
IXに沿う断面図）FIG. 9 is a vertical sectional view of the same headlamp (line IX- shown in FIG. 8).
(Cross-section view along IX)

【図１０】本発明の第３の実施例である自動車用ヘッド
ランプの要部構成図FIG. 10 is a configuration diagram of a main part of a vehicle headlamp that is a third embodiment of the present invention.

【図１１】本発明の第４の実施例である自動車用ヘッド
ランプの要部構成図FIG. 11 is a configuration diagram of a main part of a vehicle headlamp that is a fourth embodiment of the present invention.

【図１２】アークチューブの放電部の縦断面図FIG. 12 is a vertical sectional view of the discharge part of the arc tube.

【図１３】放電バルブを挿着した従来のヘッドランプの
縦断面図FIG. 13 is a vertical sectional view of a conventional headlamp in which a discharge bulb is attached.

【図１４】アークチューブを横配置したヘッドランプの
縦断面図FIG. 14 is a vertical sectional view of a headlamp in which an arc tube is horizontally arranged.

【図１５】アークが配光パターン内に逆様に現われる様
子を説明する図FIG. 15 is a diagram for explaining how arcs appear in reverse in a light distribution pattern.

【図１６】従来のヘッドランプの配光パターンを示す図FIG. 16 is a diagram showing a light distribution pattern of a conventional headlamp.

【符号の説明】[Explanation of symbols]

１０ ランプボディ １１ 放物面リフレクター ２０ 放電バルブ ２１ アークチューブ ２１ａ 放電軸 ２４ ミラー ２５ 左右拡散反射面 ２７ レンズ ２８ 直射光シェード ３２，３３，３４ エイミング機構 ４２ 第２のリフレクター Ｌ リフレクターの中心軸 10 Lamp Body 11 Parabolic Reflector 20 Discharge Bulb 21 Arc Tube 21a Discharge Axis 24 Mirror 25 Left / Right Diffuse Reflecting Surface 27 Lens 28 Direct Light Shade 32, 33, 34 Aiming Mechanism 42 Second Reflector L Reflector Central Axis

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｆ２１Ｖ 7/09 Ｃ 6908−3Ｋ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location // F21V 7/09 C 6908-3K

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 放物面リフレクターと、前記放物面リフ
レクターの略焦点位置に設けられた光源であるアークチ
ューブとを備え、アークチューブの発光を放物面リフレ
クターを介して前方に反射配光する自動車用ヘッドラン
プにおいて、前記リフレクターは、アークチューブの発
する光を下方に反射するべく反射面を下向きにして配置
されるとともに、前記リフレクターの下方位置にはリフ
レクターで反射された光を前方に反射するミラーが設け
られ、前記アークチューブは、アークチューブの対向電
極を通る放電軸を前記リフレクターの中心軸と略直交す
る水平方向に向けて、かつアークチューブの安定放電時
のアークがリフレクターの焦点近傍位置となるように配
置されたことを特徴とする自動車用ヘッドランプ。1. A parabolic reflector and an arc tube, which is a light source provided at a substantially focal position of the parabolic reflector, are provided, and the light emitted from the arc tube is reflected and distributed forward through the parabolic reflector. In the automobile headlamp, the reflector is arranged with its reflection surface facing downward so as to reflect the light emitted from the arc tube downward, and the light reflected by the reflector is reflected forward at a position below the reflector. The arc tube is provided with a discharge axis passing through a counter electrode of the arc tube in a horizontal direction substantially orthogonal to the central axis of the reflector, and the arc during stable discharge of the arc tube is near the focal point of the reflector. A headlamp for an automobile, which is arranged so as to be positioned. 【請求項２】 放物面リフレクターと、前記放物面リフ
レクターの略焦点位置に設けられた光源であるアークチ
ューブとを備え、アークチューブの発光を放物面リフレ
クターを介して前方に反射配光する自動車用ヘッドラン
プにおいて、前記リフレクターは、アークチューブの発
する光を上方に反射するべく反射面を上向きにして配置
されるとともに、前記リフレクターの上方位置にはリフ
レクターで反射された光を前方に反射するミラーが設け
られ、前記アークチューブは、アークチューブの対向電
極を通る放電軸を前記リフレクターの中心軸と略直交す
る水平方向に向けて、かつアークチューブの安定放電時
のアークがリフレクターの焦点近傍位置となるように配
置されたことを特徴とする自動車用ヘッドランプ。2. A parabolic reflector and an arc tube which is a light source provided at a substantially focal position of the parabolic reflector, and the light emitted from the arc tube is reflected and distributed forward through the parabolic reflector. In the automobile headlamp, the reflector is arranged with its reflection surface facing upward so as to reflect the light emitted by the arc tube upward, and at the position above the reflector, the light reflected by the reflector is reflected forward. The arc tube is provided with a discharge axis passing through a counter electrode of the arc tube in a horizontal direction substantially orthogonal to the central axis of the reflector, and the arc during stable discharge of the arc tube is near the focal point of the reflector. A headlamp for an automobile, which is arranged so as to be positioned. 【請求項３】 前記ミラーは水平方向および垂直方向に
傾動可能に支持されたことを特徴とする請求項１又は２
記載の自動車用ヘッドランプ。3. The mirror is supported so as to be tiltable in a horizontal direction and a vertical direction.
The automobile headlamp described.
JP4162937A 1992-06-22 1992-06-22 Head lamp for automobile Pending JPH065101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4162937A JPH065101A (en) 1992-06-22 1992-06-22 Head lamp for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4162937A JPH065101A (en) 1992-06-22 1992-06-22 Head lamp for automobile

Publications (1)

Publication Number Publication Date
JPH065101A true JPH065101A (en) 1994-01-14

Family

ID=15764082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4162937A Pending JPH065101A (en) 1992-06-22 1992-06-22 Head lamp for automobile

Country Status (1)

Country Link
JP (1) JPH065101A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692656A1 (en) 1994-07-11 1996-01-17 Nippondenso Co., Ltd. Torque converter lockup control system
JP2005135918A (en) * 2003-10-31 2005-05-26 Valeo Vision Vehicular headlamp with light source formed of discharge lamp
JP2008091350A (en) * 2007-12-26 2008-04-17 Koito Mfg Co Ltd Vehicular headlamp
KR101478480B1 (en) * 2014-01-17 2014-12-31 두산중공업 주식회사 Multi-articulated manipulator
WO2019176595A1 (en) * 2018-03-15 2019-09-19 株式会社小糸製作所 Vehicle head light

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692656A1 (en) 1994-07-11 1996-01-17 Nippondenso Co., Ltd. Torque converter lockup control system
US5701982A (en) * 1994-07-11 1997-12-30 Nippondenso Co., Ltd. Lockup control system for automatic transmission
JP2005135918A (en) * 2003-10-31 2005-05-26 Valeo Vision Vehicular headlamp with light source formed of discharge lamp
JP2008091350A (en) * 2007-12-26 2008-04-17 Koito Mfg Co Ltd Vehicular headlamp
JP4647651B2 (en) * 2007-12-26 2011-03-09 株式会社小糸製作所 Vehicle headlamp
KR101478480B1 (en) * 2014-01-17 2014-12-31 두산중공업 주식회사 Multi-articulated manipulator
US9847147B2 (en) 2014-01-17 2017-12-19 Doosan Heavy Industries & Construction Co., Ltd. Articulated manipulator
WO2019176595A1 (en) * 2018-03-15 2019-09-19 株式会社小糸製作所 Vehicle head light

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