JPH0368482B2 - - Google Patents
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- Publication number
- JPH0368482B2 JPH0368482B2 JP63039056A JP3905688A JPH0368482B2 JP H0368482 B2 JPH0368482 B2 JP H0368482B2 JP 63039056 A JP63039056 A JP 63039056A JP 3905688 A JP3905688 A JP 3905688A JP H0368482 B2 JPH0368482 B2 JP H0368482B2
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- filament
- reflective surface
- light
- passing
- 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.)
- Expired - Lifetime
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
【発明の詳細な説明】
本発明車輌用前照灯を以下の項目に従つて説明
する。DETAILED DESCRIPTION OF THE INVENTION The vehicle headlamp of the present invention will be explained in accordance with the following items.
Ａ 産業上の利用分野
Ｂ 発明の概要
Ｃ 従来技術［第６図乃至第８図］
Ｄ 発明が解決しようとする問題点［第６図乃至
第８図］
Ｅ 問題点を解決するための手段
Ｆ 実施例［第１図乃至第５図］
ａ 反射鏡［第１図乃至第３図］
ｂ フイラメント［第１図乃至第４図］
ｃ 遮光キヤツプ［第１図、第２図］
ｄ レンズ［第１図、第２図］
ｅ 配光パターン［第５図］
Ｇ 発明の効果
（Ａ 産業上の利用分野）
本発明は新規な車輌用前照灯に関する。詳しく
は、反射鏡の反射面をいくつかに分割して、反射
鏡の各部分の焦点距離と焦点位置を適宜に変える
ことによつて反射光だけで車輌用前照灯に望まれ
る配光パターンに近い配光パターンが得られるよ
うにし、レンズに対する負担が少なくて済むよう
にした新規な車輌用前照灯を提供しようとするも
のである。A. Field of industrial application B. Summary of the invention C. Prior art [Figures 6 to 8] D. Problems to be solved by the invention [Figures 6 to 8] E. Means for solving the problems F Examples [Figs. 1 to 5] a Reflector [Figs. 1 to 3] b Filament [Figs. 1 to 4] c Light-shielding cap [Figs. 1 and 2] d Lens [Figs. 1, FIG. 2] e Light distribution pattern [FIG. 5] G. Effects of the invention (A. Field of industrial application) The present invention relates to a novel headlamp for a vehicle. Specifically, by dividing the reflective surface of the reflector into several parts and changing the focal length and focal position of each part of the reflector as appropriate, the desired light distribution pattern for a vehicle headlamp can be created using only reflected light. The present invention aims to provide a novel vehicular headlamp that can obtain a light distribution pattern close to that of the present invention and that requires less burden on the lens.
（Ｂ 発明の概要）
本発明車輌用前照灯は、正面から見て上下及び
左右４つの部分に分割されそれぞれが回転放物面
状を為すと共に稍前下がりの共通の光軸を有する
反射面から成る反射鏡と走行ビーム用及びすれ違
いビーム用の２つのフイラメントを備え、走行ビ
ーム用フイラメントは光軸に対して平行に、か
つ、光軸より下側で光軸を通る垂線より右又は左
に離れて位置し、すれ違いビーム用フイラメント
は正面から見て光軸に関して走行ビーム用フイラ
メントの対称位置、即ち、光軸より上側で光軸を
通る垂線より左又は右に離れた位置に配置され、
左右の反射面の焦点距離が上側の反射面の焦点距
離より小さくされ、上記各反射面の焦点は光軸上
であつて、左右の反射面の焦点はフイラメントの
中央に対応した位置に、上側反射面の焦点はフイ
ラメントの後端に対応した位置に、下側反射面の
焦点はフイラメントの前端に対応した位置に、そ
れぞれ配置されたもので、これによつて、反射鏡
による反射光のみで車輌用前照灯の配光パターン
に要求されるパターンに近い配光パターンを得る
ことができ、レンズの果たす役割を小さくするこ
とができる。(B Summary of the Invention) The vehicle headlamp of the present invention is divided into four parts, top and bottom, left and right, when viewed from the front, each of which has a paraboloid of revolution shape, and has a reflective surface that has a common optical axis slightly downward in front. and two filaments, one for the running beam and one for the passing beam. The passing beam filament is located at a position symmetrical to the running beam filament with respect to the optical axis when viewed from the front, i.e., at a position above the optical axis and spaced apart to the left or right of a perpendicular line passing through the optical axis;
The focal length of the left and right reflective surfaces is smaller than the focal length of the upper reflective surface, and the focus of each of the reflective surfaces is on the optical axis, and the focal length of the left and right reflective surfaces is at a position corresponding to the center of the filament, and The focal point of the reflective surface is located at a position corresponding to the rear end of the filament, and the focal point of the lower reflective surface is located at a position corresponding to the front end of the filament. A light distribution pattern close to that required for a vehicle headlamp can be obtained, and the role played by the lens can be reduced.
（Ｃ 従来技術）［第６図乃至第８図］
走行ビーム用フイラメントとすれ違いビーム用
フイラメントを備えた車輌用前照灯に、すれ違い
ビーム用フイラメントの前面と略下半分を遮光キ
ヤツプで覆つたものがあるが、このような車輌用
前照灯にあつては、すれ違いビーム用フイラメン
トに関し反射鏡の略下半分に向う光が全く無駄な
ものとなつてしまうという問題がある。(C Prior Art) [Figures 6 to 8] A vehicle headlamp equipped with a driving beam filament and a passing beam filament, with the front and substantially lower half of the passing beam filament covered with a light-shielding cap. However, in such a vehicle headlamp, there is a problem in that the light directed toward substantially the lower half of the reflecting mirror regarding the low beam filament is completely wasted.
そこで、第６図乃至第８図に示すような車輌用
前照灯ａが提案されている。 Therefore, a vehicle headlamp a as shown in FIGS. 6 to 8 has been proposed.
ｂは反射鏡であり、回転放物面状の反射面ｃを
備えている。反射面ｃの光軸ｘ−ｘは稍前下がり
に傾斜している。 b is a reflecting mirror, and is provided with a reflecting surface c in the shape of a paraboloid of revolution. The optical axis xx of the reflective surface c is inclined slightly downward.
ｄは走行ビーム用フイラメントであり、正面か
ら見て光軸ｘ−ｘの左下方に、かつ、光軸ｘ−ｘ
と略平行に延びるように配置されている。ｅはす
れ違いビーム用フイラメントであり、正面から見
て光軸ｘ−ｘの右上方に、かつ、光軸ｘ−ｘと略
平行に延びるように配置されている。そして、上
記反射面ｃの焦点ｆはフイラメントｄ，ｅの前後
方向における中央部と対応した位置に配置されて
いる。 d is a filament for the traveling beam, which is located below and to the left of the optical axis x-x when viewed from the front;
It is arranged so as to extend substantially parallel to the . Denoted by e is a filament for a passing beam, which is disposed to the upper right of the optical axis x-x when viewed from the front and to extend substantially parallel to the optical axis x-x. The focal point f of the reflective surface c is located at a position corresponding to the center of the filaments d and e in the front-rear direction.
ｇはフイラメントｅ，ｄの前面を覆つた遮光キ
ヤツプであり、これによつて、反射鏡ｂの前方へ
は反射光のみが出射されるようになつている。 g is a light-shielding cap covering the front surfaces of filaments e and d, so that only reflected light is emitted in front of reflecting mirror b.
ｈは反射鏡ｂの前面を覆うように配置されたレ
ンズである。 h is a lens arranged to cover the front surface of the reflecting mirror b.
しかして、上記した車輌用前照灯ａによつて、
第８図に示すような反射光による配光パターン、
即ち、レンズｈを通さない状態での配光パターン
が得られる。このうち、ｉが走行ビーム用フイラ
メントｄからの光によるもので、ｊがすれ違いビ
ーム用フイラメントｅからの光によるものであ
る。そして、これらパターンｉ及びｊがレンズｈ
によつて整えられて、それぞれ走行ビーム及びす
れ違いビームとして適合した配光パターンとされ
る。 However, with the above-mentioned vehicle headlight a,
A light distribution pattern by reflected light as shown in Fig. 8,
That is, a light distribution pattern without passing through the lens h can be obtained. Of these, i is due to the light from the traveling beam filament d, and j is due to the light from the passing beam filament e. These patterns i and j form the lens h
The light distribution patterns are arranged to be suitable for a traveling beam and a passing beam, respectively.
（Ｄ 発明が解決しようとする問題点）［第６図
乃至第８図］
上記した従来の車輌用前照灯ａにあつては、レ
ンズｈを通さない状態では、左右への拡がりのな
い略円形の配光パターンｉ，ｊが得られるのみで
あるので、これを走行ビームあるいはすれ違いビ
ームとして適合する配光パターンにするためには
レンズｈが大いに働かなければならない。(D Problems to be Solved by the Invention) [Figures 6 to 8] In the above-mentioned conventional vehicle headlight a, when the lens h is not passed through, the light does not spread to the left or right. Since only circular light distribution patterns i and j are obtained, the lens h must work very hard to make this a light distribution pattern suitable for a traveling beam or a passing beam.
このようにレンズｈの負担が大きくなると、走
行ビーム、すれ違いビームのうち一方のために設
けた大きな制御角を有するレンズ素子が他方のビ
ームの制御のためには邪魔になつて来る等の問題
が多く出て来て、レンズｈの設計上両者の調和を
図るために多大な努力を要求され、レンズの設計
が難しく、かつ、コストが増大する等様々な問題
が生じる。 When the load on the lens h increases in this way, problems arise such as a lens element with a large control angle provided for one of the traveling beam and the passing beam becoming a hindrance to controlling the other beam. A large number of these elements occur, and a great deal of effort is required to achieve harmony between the two when designing the lens h, which causes various problems such as difficulty in designing the lens and increased cost.
また、パワーを増す、即ち、反射面ｃの利用立
体角を増すために、反射面ｃの焦点距離を小さく
すると、上記パターンｉ，ｊが大きくなりすぎ、
グレア光が増大して配光が成立たないという問題
もある。 Furthermore, if the focal length of the reflective surface c is decreased in order to increase the power, that is, increase the solid angle of use of the reflective surface c, the patterns i and j become too large,
There is also the problem that glare light increases and light distribution cannot be achieved.
（Ｅ 問題点を解決するための手段）
本発明車輌用前照灯は、上記した問題点を解決
するために、正面から見て上下及び左右４つの部
分に分割されそれぞれが回転放物面状を為すと共
に稍前下がりの共通の光軸を有する反射面から成
る反射鏡と走行ビーム用及びすれ違いビーム用の
２つのフイラメントを備え、走行ビーム用フイラ
メントは光軸に対して平行に、かつ、光軸より下
側で光軸を通る垂線より右又は左に離れて位置
し、すれ違いビーム用フイラメントは正面から見
て光軸に関して走行ビーム用フイラメントの対称
位置、即ち、光軸より上側で光軸を通る垂線より
左又は右に離れた位置に配置され、左右の反射面
の焦点距離が上側の反射面の焦点距離より小さく
され、上記各反射面の焦点は光軸上であつて、左
右の反射面の焦点はフイラメントの中央に対応し
た位置に、上記反射面の焦点はフイラメントの後
端に対応した位置に、下側反射面の焦点はフイラ
メントの前端に対応した位置に、それぞれ配置さ
れたものである。(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the vehicle headlight of the present invention is divided into four parts, upper and lower, left and right when viewed from the front, and each part has a paraboloid of revolution shape. It is equipped with a reflector consisting of a reflective surface having a common optical axis slightly downwardly inclined, and two filaments for the traveling beam and for the passing beam.The filament for the traveling beam is parallel to the optical axis and The passing beam filament is located below the optical axis and away to the right or left of the perpendicular line passing through the optical axis, and the passing beam filament is located at a symmetrical position with respect to the optical axis when viewed from the front, that is, the optical axis is located above the optical axis. It is placed at a position away from the perpendicular to the left or right, and the focal length of the left and right reflective surfaces is smaller than the focal length of the upper reflective surface, and the focal length of each reflective surface is on the optical axis, and the left and right reflective surfaces The focal point of the surface is located at a position corresponding to the center of the filament, the focal point of the above reflective surface is located at a position corresponding to the rear end of the filament, and the focal point of the lower reflective surface is located at a position corresponding to the front end of the filament. It is.
従つて、本発明車輌用前照灯によれば、反射鏡
による反射光だけで車輌用前照灯の配光に要求さ
れ配光パターンに近い配光パターンが得られるた
め、レンズの負担が軽くなり、その分より良い配
光パターンを得ることができる。また、左右の反
射面についてはその焦点距離を小さくしてもその
パターンの拡がりは左右方向に大きくなるだけで
あるため、グレアの増大を招くことなく、パワー
を増大させることができる。 Therefore, according to the vehicle headlamp of the present invention, a light distribution pattern close to the light distribution pattern required for a vehicle headlamp can be obtained using only the light reflected by the reflecting mirror, so that the burden on the lens is light. Therefore, a better light distribution pattern can be obtained. Furthermore, even if the focal length of the left and right reflecting surfaces is reduced, the spread of the pattern will only increase in the left and right direction, so it is possible to increase the power without causing an increase in glare.
（Ｆ 実施例）［第１図乃至第５図］
以下に、本発明車輌用前照灯の詳細を図示した
実施例に従つて説明する。(Embodiment F) [Figures 1 to 5] Details of the vehicle headlamp of the present invention will be described below with reference to illustrated embodiments.
図中１は本発明車輌用前照灯を実施した自動車
用前照灯である。 In the figure, 1 is an automobile headlamp in which the vehicular headlamp of the present invention is implemented.
（ａ 反射鏡）［第１図乃至第３図］
２は反射鏡であり、前方に向つて開口した略横
長の箱形をしており、前方を向いた反射面部３と
上下及び左右の側面部４，４，…………とから成
る。そして、反射面部３の中央部には電球挿通孔
５が形成されている。(a Reflector) [Figures 1 to 3] Reference numeral 2 is a reflector, which is shaped like a horizontally long box that opens toward the front, and has a reflective surface section 3 facing forward, and upper, lower, left, and right side surfaces. It consists of parts 4, 4, and so on. A light bulb insertion hole 5 is formed in the center of the reflective surface portion 3.
反射面部３は上下６，７及び左右８，８の４つ
の部分に分割されている。 The reflective surface section 3 is divided into four parts: upper and lower parts 6 and 7 and left and right parts 8 and 8.
上側反射面６は電球挿通孔５の縁の上側略４分
の１の部分と該部分の両端から反射面部３の左右
側縁の上端寄りの部分まで延びる線９，９と反射
面部３の上縁とによつて区画された扇型の部分を
為し、下側反射面７は電球挿通孔５の縁の下側略
４分の１の部分と該部分の両端から反射面部３の
左右側縁の下端寄りの部分まで延びる線１０，１
０と反射面部３の下縁とによつて区画された扇型
の部分を為し、左側及び右側反射面８，８は電球
挿通孔５の縁の左右それぞれ略４分の１の部分と
該部分の両端から反射面部３の左右側縁のそれぞ
れ上端寄りの部分及び下端寄りの部分まで延びる
線９，１０及び９，１０と反射面部３の左側縁及
び右側縁とによつて区画された扇型の部分を為し
ている。 The upper reflective surface 6 includes approximately one-fourth of the upper edge of the light bulb insertion hole 5, lines 9, 9 extending from both ends of this portion to upper ends of the left and right edges of the reflective surface portion 3, and the top of the reflective surface portion 3. The lower reflective surface 7 forms a fan-shaped portion divided by the edge of the light bulb insertion hole 5 and the left and right sides of the reflective surface portion 3 from both ends of the lower portion of the edge of the light bulb insertion hole 5. Lines 10, 1 extending to the lower end of the edge
0 and the lower edge of the reflective surface portion 3, and the left and right reflective surfaces 8, 8 correspond to approximately one-quarter of the left and right edges of the light bulb insertion hole 5, respectively. A fan defined by lines 9, 10 and 9, 10 extending from both ends of the section to the upper and lower ends of the left and right side edges of the reflective surface section 3, respectively, and the left and right edges of the reflective surface section 3. It forms part of the mold.
そして、上記各反射面６，７，８，８はそれぞ
れ回転放物面状をしていると共に、共通の光軸ｘ
−ｘを有しており、かつ、該光軸ｘ−ｘは稍前下
がりに、即ち、真直前方に延びるランプ軸ｙ−ｙ
に対して稍前下がりに傾斜している。また、各反
射面６，７，８，８の焦点距離F6，F7，F8，F8
はF6＞F8という関係になつており、更に好まし
くはF7＞F6となつている。 Each of the reflecting surfaces 6, 7, 8, 8 has a paraboloid of revolution shape, and has a common optical axis x.
-x, and the optical axis x-x is a lamp axis y-y that extends slightly forward, that is, directly forward.
It is tilted slightly downwards. Also, the focal lengths of each reflective surface 6, 7, 8, 8 are F 6 , F 7 , F 8 , F 8
The relationship is F 6 >F 8 , and more preferably F 7 >F 6 .
尚、各反射面６，７，８，８の焦点位置もそれ
ぞれ違つているが、これはフイラメントとの関係
で後述する。 Note that the focal positions of the reflecting surfaces 6, 7, 8, and 8 are also different, which will be described later in relation to the filament.
（ｂ フイラメント）［第１図乃至第４図］
１１は電球であり、１２はガラス球、１３はガ
ラス球１２を支持した口金部である。(b Filament) [Figures 1 to 4] 11 is a light bulb, 12 is a glass bulb, and 13 is a cap part that supports the glass bulb 12.
１４，１５はガラス球１２内に互いに平行にな
るように配設されたフイラメントであり、それぞ
れの両端がリード線１６，１６，…………のうち
それぞれ対を為すものの両端に支持されている。
そして、これら２つのフイラメント１４，１５の
うち、一方１４が走行ビーム用フイラメントであ
り、他方１５がすれ違いビーム用フイラメントで
ある。 Reference numerals 14 and 15 indicate filaments arranged parallel to each other within the glass bulb 12, and both ends of each filament are supported by the ends of a pair of lead wires 16, 16, . . . .
Of these two filaments 14 and 15, one 14 is a filament for a traveling beam, and the other 15 is a filament for a passing beam.
そして、かかる電球１１は、そのガラス球１２
が反射鏡２の電球挿通孔５に後方から挿通され、
口金部１３が電球挿通孔５に支持される。 The light bulb 11 includes the glass bulb 12
is inserted into the light bulb insertion hole 5 of the reflector 2 from behind,
The base portion 13 is supported in the light bulb insertion hole 5.
この状態で、走行ビーム用フイラメント１４は
光軸ｘ−ｘに対して平行に、かつ、光軸ｘ−ｘよ
り下側で光軸ｘ−ｘを通る垂線１７より正面から
見て左（左配光の場合。右配光のときは右。）に
離れた所に位置している。また、すれ違いビーム
用フイラメント１５は光軸ｘ−ｘに対して平行
に、かつ、光軸ｘ−ｘより上側で光軸ｘ−ｘを通
る垂線１７より正面から見て右（左配光のとき。
右配光のときは左。）に離れた所に位置している。
即ち、走行ビーム用フイラメント１４とすれ違い
ビーム用フイラメント１５とは正面から見て光軸
ｘ−ｘに対して対称に位置している。 In this state, the traveling beam filament 14 is placed parallel to the optical axis x-x and below the optical axis x-x to the left (left side) of the perpendicular line 17 passing through the optical axis x-x when viewed from the front. In the case of light, it is located far away to the right (in the case of right-hand light distribution). The filament 15 for the passing beam is placed parallel to the optical axis x-x and above the optical axis x-x to the right of the perpendicular line 17 passing through the optical axis x-x when viewed from the front (in the case of left-hand light distribution). .
Left when right light distribution. ) located far away.
That is, the traveling beam filament 14 and the passing beam filament 15 are located symmetrically with respect to the optical axis x--x when viewed from the front.
更に、上記した各反射面６，７，８，８の各焦
点f6，f7，f8は光軸ｘ−ｘ上に位置しているが、
左右の反射面８，８の焦点f8は第４図に示すよう
に、フイラメント１４，１５と光軸ｘ−ｘが重な
つて見える方向から見た状態で、フイラメント１
４，１５の中央に対応した位置に、上側反射面６
の焦点f6はフイラメント１４，１５の後端に対応
した位置に、下側反射面７の焦点f7はフイラメン
ト１４，１５の前端に対応した位置に、それぞれ
配置されている。 Furthermore, the focal points f 6 , f 7 , f 8 of each of the reflecting surfaces 6, 7, 8, 8 described above are located on the optical axis x-x,
As shown in FIG. 4, the focal point f8 of the left and right reflecting surfaces 8, 8 is located at the filament 1 when viewed from the direction in which the filaments 14, 15 and the optical axis x-x overlap.
The upper reflective surface 6 is located at a position corresponding to the center of 4 and 15.
The focal point f 6 of the lower reflective surface 7 is located at a position corresponding to the rear ends of the filaments 14 and 15, and the focal point f 7 of the lower reflective surface 7 is located at a position corresponding to the front ends of the filaments 14 and 15, respectively.
（ｃ 遮光キヤツプ）［第１図、第２図］
１８は帽子状をした遮光キヤツプであり、上記
フイラメント１４，１５の前側を覆うように配置
され、この結果反射鏡２による反射光以外は前方
へ出射されないようになつている。(c Light-shielding cap) [Figures 1 and 2] Reference numeral 18 is a hat-shaped light-shielding cap, which is arranged to cover the front side of the filaments 14 and 15, so that light other than the light reflected by the reflecting mirror 2 is directed forward. It is designed so that it will not be emitted.
（ｄ レンズ）［第１図、第２図］
１９はレンズであり、反射鏡２にその前面開口
を覆うように取着され、その内面には図示しない
種々の光制御用のレンズ素子が形成されている。(d Lens) [Figures 1 and 2] Reference numeral 19 denotes a lens, which is attached to the reflecting mirror 2 so as to cover its front opening, and various lens elements (not shown) for light control are formed on its inner surface. has been done.
（ｅ 配光パターン）［第５図］
しかして、上記した自動車用前照灯１にあつて
は、走行ビーム用フイラメント１４の点灯によつ
て第５図Ａに示す配光パターン２０が、また、す
れ違いビーム用フイラメント１５の点灯によつて
第５図Ｂに示す配光パターン２１が、レンズ１９
を通さない状態で形成される。(e Light distribution pattern) [FIG. 5] However, in the above-mentioned automobile headlamp 1, the light distribution pattern 20 shown in FIG. , the light distribution pattern 21 shown in FIG.
It is formed in a state where it does not pass through.
尚、これら配光パターン２０，２１のうち、２
０Ａ，２１Ａは左右の反射面８，８で反射された
反射光による配光部分、２０Ｂ，２１Ｂは上側反
射面６で反射された反射光による配光部分、２０
Ｃ，２１Ｃは下側反射面７で反射された反射光に
よる配光部分である。 Note that among these light distribution patterns 20 and 21, 2
0A and 21A are light distribution portions due to the reflected light reflected by the left and right reflective surfaces 8, 8, 20B and 21B are light distribution portions due to the reflected light reflected from the upper reflective surface 6, 20
C and 21C are light distribution portions due to the reflected light reflected by the lower reflective surface 7.
このように、レンズ１９を通さない状態におい
て、走行ビームあるいはすれ違いビームに要求さ
れる配光パターンにきわめて近い（70％位）配光
パターン２０あるいは２１が得られるので、あと
少しレンズ１９によつて整えてやれば、走行ビー
ムやすれ違いビームとして良好な配光パターンを
得ることができる。 In this way, without passing through the lens 19, a light distribution pattern 20 or 21 that is extremely close (about 70%) to the light distribution pattern required for a traveling beam or a passing beam can be obtained. If adjusted properly, a good light distribution pattern can be obtained as a traveling beam or a passing beam.
（Ｇ 発明の効果）
以上に記載したところから明らかなように、本
発明車輌用前照灯は、反射鏡と走行ビーム用及び
すれ違いビーム用の２つのフイラメントとすれ違
いビーム用フイラメントの前面を覆つた遮光キヤ
ツプとを備えた車輌用前照灯であつて、反射鏡は
その反射面が正面から見て上下及び左右４つの部
分に分割されていて、上下及び左右各反射面は回
転放物面状を為し稍前下がりの共通の光軸を有し
ており、走行ビーム用フイラメントは光軸に対し
て平行に、かつ、光軸より下側で光軸を通る垂線
より右又は左に離れて位置し、すれ違いビーム用
フイラメントは正面から見て光軸に関して走行ビ
ーム用フイラメントの対称位置、即ち、光軸より
上側で光軸を通る垂線より左又は右に離れた位置
に配置され、左右の反射面の焦点距離が上側の反
射面の焦点距離より小さくされ、上記各反射面の
焦点は光軸上であつて、左右の反射面の焦点はフ
イラメントの中央に対応した位置に、上側反射面
の焦点はフイラメントの後端に対応した位置に、
下側反射面の焦点はフイラメントの前端に対応し
た焦点に、それぞれ配置されたことを特徴とす
る。(G Effect of the Invention) As is clear from the above description, the vehicle headlight of the present invention includes a reflector, two filaments for the driving beam and the passing beam, and a front surface of the passing beam filament. This is a vehicle headlamp equipped with a light-shielding cap, and the reflecting surface of the reflecting mirror is divided into four parts, top, bottom, left and right when viewed from the front, and each of the top, bottom, left and right reflecting surfaces are shaped like a paraboloid of revolution. The filament for the traveling beam is parallel to the optical axis, and is spaced below the optical axis to the right or left of the perpendicular line passing through the optical axis. The passing beam filament is placed at a symmetrical position to the traveling beam filament with respect to the optical axis when viewed from the front, that is, at a position above the optical axis and away from the perpendicular line passing through the optical axis to the left or right, so that left and right reflections occur. The focal length of the surface is smaller than the focal length of the upper reflective surface, and the focal point of each reflective surface is on the optical axis, and the focal length of the left and right reflective surfaces is at a position corresponding to the center of the filament. The focal point is at the position corresponding to the rear end of the filament.
The lower reflective surface is characterized in that its focal points are respectively arranged at focal points corresponding to the front end of the filament.
従つて、本発明車輌用前照灯によれば、反射鏡
による反射光だけで車輌用前照灯の配光に要求さ
れ配光パターンに近い配光パターンが得られるた
め、レンズの負担が軽くなり、その分より良い配
光パターンを得ることができる。また、左右の反
射面についてはその焦点距離を小さくしてもその
パターンの拡がりは左右方向に大きくなるだけで
あるため、グレアの増大を招くことなく、パワー
を増大させることができる。 Therefore, according to the vehicle headlamp of the present invention, a light distribution pattern close to the light distribution pattern required for a vehicle headlamp can be obtained using only the light reflected by the reflecting mirror, so that the burden on the lens is light. Therefore, a better light distribution pattern can be obtained. Furthermore, even if the focal length of the left and right reflecting surfaces is reduced, the spread of the pattern will only increase in the left and right direction, so it is possible to increase the power without causing an increase in glare.
第１図乃至第５図は本発明車輌用前照灯の実施
の一例を示すものであり、第１図は一部を切り欠
いて示す正面図、第２図は第１図の−線に沿
う断面図、第３図は反射鏡の正面図、第４図は第
１図の拡大矢視図、第５図は配光パターン図で
あり、Ａは走行ビームの、Ｂはすれ違いビーム
の、配光パターンをそれぞれ示し、第６図乃至第
８図は従来の車輌用前照灯の一例を示すもので、
第６図は一部切欠概略正面図、第７図は概略縦断
面図、第８図は配光パターン図である。
符号の説明、１……車輌用前照灯、２……反射
鏡、６……上側反射面、７……下側反射面、８…
…左右の反射面、１４……走行ビーム用フイラメ
ント、１５……すれ違いビーム用フイラメント、
１７……光軸を通る垂線、１８……遮光キヤツ
プ、ｘ−ｘ……光軸、f6……上側反射面の焦点、
f7……下側反射面の焦点、f8……左右の反射面の
焦点。
1 to 5 show an example of the implementation of the vehicle headlamp of the present invention, FIG. 1 is a partially cutaway front view, and FIG. 2 is a diagram taken along the - line in FIG. 1. 3 is a front view of the reflecting mirror, FIG. 4 is an enlarged view of FIG. 1, and FIG. 5 is a light distribution pattern diagram. Each of the light distribution patterns is shown, and FIGS. 6 to 8 show an example of a conventional vehicle headlight.
FIG. 6 is a partially cutaway schematic front view, FIG. 7 is a schematic vertical sectional view, and FIG. 8 is a light distribution pattern diagram. Explanation of symbols, 1...Vehicle headlight, 2...Reflector, 6...Upper reflective surface, 7...Lower reflective surface, 8...
...Left and right reflective surfaces, 14...Filament for traveling beam, 15...Filament for passing beam,
17... Perpendicular line passing through the optical axis, 18... Light-shielding cap, x-x... Optical axis, f 6 ... Focal point of the upper reflective surface,
f 7 ...Focus of the lower reflective surface, f 8 ...Focus of the left and right reflective surfaces.
Claims (1)
の２つのフイラメントとすれ違いビーム用フイラ
メントの前面を覆つた遮光キヤツプとを備えた車
輌用前照灯であつて、 反射鏡はその反射面が正面から見て上下及び左
右４つの部分に分割されていて、 上下及び左右各反射面は回転放物面状を為し稍
前下がりの共通の光軸を有しており、 走行ビーム用フイラメントは光軸に対して平行
に、かつ、光軸より下側で光軸を通る垂線より右
又は左に離れて位置し、 すれ違いビーム用フイラメントは正面から見て
光軸に関して走行ビーム用フイラメントの対称位
置、即ち、光軸より上側で光軸を通る垂線より左
又は右に離れた位置に配置され、 左右の反射面の焦点距離が上側の反射面の焦点
距離より小さくされ、 上記各反射面の焦点は光軸上であつて、左右の
反射面の焦点はフイラメントの中央に対応した位
置に、上側反射面の焦点はフイラメントの後端に
対応した位置に、下側反射面の焦点はフイラメン
トの前端に対応した位置に、それぞれ配置された ことを特徴とする車輌用前照灯。[Scope of Claims] 1. A vehicle headlamp comprising a reflecting mirror, two filaments for a running beam and a passing beam, and a light-shielding cap covering the front surface of the passing beam filament, the reflecting mirror comprising: The reflecting surface is divided into four parts, top, bottom, left and right when viewed from the front, and each of the top, bottom, left and right reflecting surfaces are in the shape of a paraboloid of revolution and have a common optical axis that slopes slightly forward and downward, and the traveling beam The filament for the passing beam is located parallel to the optical axis, and below the optical axis, to the right or left of the perpendicular line passing through the optical axis. It is arranged at a symmetrical position, that is, above the optical axis and away from the perpendicular line passing through the optical axis to the left or right, and the focal length of the left and right reflective surfaces is smaller than the focal length of the upper reflective surface, and each of the above reflections The focal point of the surface is on the optical axis, the focal point of the left and right reflective surfaces is at a position corresponding to the center of the filament, the focal point of the upper reflective surface is at a position corresponding to the rear end of the filament, and the focal point of the lower reflective surface is at a position corresponding to the rear end of the filament. A vehicle headlight characterized in that each of the vehicle headlights is arranged at a position corresponding to the front end of the filament.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039056A JPH01213903A (en) | 1988-02-22 | 1988-02-22 | Headlight for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039056A JPH01213903A (en) | 1988-02-22 | 1988-02-22 | Headlight for car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01213903A JPH01213903A (en) | 1989-08-28 |
| JPH0368482B2 true JPH0368482B2 (en) | 1991-10-28 |
Family
ID=12542475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63039056A Granted JPH01213903A (en) | 1988-02-22 | 1988-02-22 | Headlight for car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01213903A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000100233A (en) * | 1998-09-25 | 2000-04-07 | Ichikoh Ind Ltd | Headlight |
| JP2000164021A (en) * | 1998-11-20 | 2000-06-16 | Ichikoh Ind Ltd | Headlight |
-
1988
- 1988-02-22 JP JP63039056A patent/JPH01213903A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01213903A (en) | 1989-08-28 |
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