JPH0244601A - Projector type headlight - Google Patents
Projector type headlightInfo
- Publication number
- JPH0244601A JPH0244601A JP63192431A JP19243188A JPH0244601A JP H0244601 A JPH0244601 A JP H0244601A JP 63192431 A JP63192431 A JP 63192431A JP 19243188 A JP19243188 A JP 19243188A JP H0244601 A JPH0244601 A JP H0244601A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- filament
- concave reflector
- focal point
- 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
Links
- 230000004907 flux Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 230000011514 reflex Effects 0.000 abstract 3
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
本発明は自動車に装着される前照灯に関するものである
。The present invention relates to a headlamp mounted on an automobile.
従来のプロジェクタ型前照灯２１を示すものが第３図で
あり、楕円系凹面反射鏡２２の第一焦点、即ち反射鏡２
２に近い側の焦点に光源となる電球２３のフィラメント
２３ａを配設し、前記楕円系凹面反射鏡２２の第二焦点
の近傍に投影レンズ２４を配設しておき、更に前記投影
レンズ２４の焦点の近傍に配光特性上で不必要部分を遮
蔽する遮光板２５を配設しておくものであり、このよう
に構成することで前記フィラメント２３ａからの前記楕
円系凹面反射鏡２２で反射される光束は略第二焦点の位
置にある前記投影レンズ２４に入射するものとなり、こ
の投影レンズ２４により照射方向へ適宜な照射角として
照射されるものとなり、このとき前記遮光板２５が前記
投影レンズ２４の略焦点の位置に設けられていることで
、この遮光板２５の形状が反転して投影され、求める配
光特性が得られるものとなる。FIG. 3 shows a conventional projector type headlamp 21, in which the first focal point of the elliptical concave reflector 22, that is, the reflector 2
The filament 23a of the light bulb 23 serving as a light source is disposed at the focal point on the side closer to the second focal point, and the projection lens 24 is disposed near the second focal point of the ellipsoidal concave reflecting mirror 22. A light shielding plate 25 is disposed near the focal point to shield unnecessary portions due to light distribution characteristics, and with this configuration, light from the filament 23a is reflected by the elliptic concave reflecting mirror 22. The light flux enters the projection lens 24 located approximately at the second focal point, and is irradiated by the projection lens 24 in the irradiation direction at an appropriate irradiation angle, and at this time, the light shielding plate 25 24, the shape of the light shielding plate 25 is inverted and projected, and the desired light distribution characteristic can be obtained.
しかしながら、前記した従来のプロジェクタ型前照灯２
１は、前記遮光板２５を例えばすれ違いビームの配光特
性に適するものとしたときには、このプロジェクタ型前
照灯２１の用途はすれ違いビームに限定されるものとな
り、自動車に取付る際には、図示のようにほぼ同一な構
成とした走行ビーム用の前照灯２６を別体に設ける必要
を生じ、これにより従来から使用されているすれ違いビ
ームと走行ビームとがダブルフィラメントの電球を使用
することで切換え可能な放物線系凹面反射鏡を使用した
前照灯に比較して、コスト、取付スペースなど全ての面
で倍増するものとなり、例えば大衆車などに採用できず
汎用性に欠けると云う課題を生ずるものであった。However, the conventional projector type headlight 2 described above
1, when the light shielding plate 25 is made to be suitable for the light distribution characteristic of a passing beam, for example, the application of this projector type headlamp 21 is limited to a passing beam, and when installed in a car, it is necessary to It became necessary to provide a separate headlight 26 for the running beam, which has almost the same configuration as shown in Fig. Compared to a headlight that uses a switchable parabolic concave reflector, it costs twice as much in all aspects, including cost and installation space, creating the problem that it cannot be used in popular vehicles, for example, and lacks versatility. It was something.
本発明は前記したプロジェクション型前照灯に生ずる課
題を解決するための具体的手段として、楕円系凹面反射
鏡と、該楕円系凹面反射鏡の略筆−焦点の位置に配設さ
れた第一の光源と、前記楕円系凹面反射鏡の略第二焦点
の位置に配設された投影レンズと、該投影レンズの略焦
点の位置に配設された遮光板とで成るプロジェクタ型前
照灯において、前記第一の光源よりも前方であり且つす
れ違いビーム用に形成された前記遮光板よりも後方の位
置には前記第一の光源と独立して点滅操作が可能な第二
の光源が配設され、前記楕円系凹面反射鏡の左右には前
記第二の光源を略焦点とする放物線系凹面反射鏡が配設
され、前記投影レンズの前方には前記楕円系凹面反射鏡
と前記放物線系凹面反射鏡との双方からの反射光を入射
させる前面レンズが設けられていることを特徴とするプ
ロジェクタ型前照灯を提供することで、このプロジェク
タ型前照灯においても一体の灯具ですれ違いビームと走
行ビームとを切換え可能として、前記従来の課題を解決
するものである。The present invention provides a concrete means for solving the problems that occur in the projection type headlight described above, and includes an elliptical concave reflector and a first ellipsoidal concave reflector disposed at the approximate stroke-focal position of the elliptical concave reflector. A projector-type headlamp comprising a light source, a projection lens disposed at a position approximately at the second focal point of the ellipsoidal concave reflecting mirror, and a light shielding plate disposed at a position approximately at the focal point of the projection lens. , a second light source that can be operated to blink independently of the first light source is disposed at a position in front of the first light source and behind the light shielding plate formed for the passing beam. On the left and right sides of the elliptic concave reflector, parabolic concave reflectors having the second light source as a substantially focal point are disposed, and in front of the projection lens, the elliptic concave reflector and the parabolic concave reflector are disposed. By providing a projector-type headlamp that is characterized by being equipped with a front lens that allows reflected light from both the reflector and the reflector to enter, this projector-type headlamp also eliminates the possibility of passing beams with an integrated lighting device. The above-mentioned conventional problems can be solved by making it possible to switch between the traveling beam and the traveling beam.
つぎに、本発明を図に示す一実施例の基づいて詳細に説
明する。
第１図、第２図に符号１で示すものは本発明に係るプロ
ジェクタ型前照灯であり、この前照灯１にも従来例と同
様な楕円系凹面反射鏡２と、該反射鏡２の第一焦点に配
設された第一の光源である第一の電球３の第一のフィラ
メン） ３ ａ ％前記反射鏡２の第二焦点の近傍に配
設された投影レンズ４、前記投影レンズ４の焦点の近傍
に配設された遮光板５が設けられているものであるが、
更に、本発明により前記遮光板５はすれ違いビーム用と
して形成され、この遮光板５と前記した第一の光源であ
る第一のフィラメント３ａとの中間の、位置には第二の
光源としての第二の電球６の第二のフィラメン）８ａが
、第一の光源である前記第一のフィラメント３ａとは独
立して点滅操作が可能なように配設されていて、更に前
記楕円系凹面反射鏡２の左右側面には前記第二のフィラ
メント６ａを焦点とする回転放物面など放物線系凹面反
射鏡７．７が設けられ、前記第二のフィラメント６ａか
らの光束をこの前照灯１の水平方向前方に平行光線とし
て反射するようにされている。
同時に前記投影レンズ４の前方には、この投影レンズ４
からの光線と前記放物線系凹面反射鏡７．７からの光線
の双方が充分に入射できる大きさの前面レンズ８が設け
られ、前記投影レンズ４に対応する位置には、この投影
レンズ４からの光線を受は一層にすれ違いビームの配光
特性を整えるためのすれ違いビーム用レンズカット８ａ
が施され、前記放物線系凹面反射鏡７．７からの光束が
入射する位置には走行ビームとしての配光特性を整える
ための走行ビーム用レンズカット８ｂ。
８ｂが施されている。
尚、前記第二のフィラメント６ａを点灯するときに前記
第一のフィラメン）３ａの点灯を保持するか、あるいは
消灯するかは、例えば仕向地の関係法規に従い選択すれ
ば良いものである。Next, the present invention will be explained in detail based on an embodiment shown in the drawings. 1 and 2 is a projector type headlamp according to the present invention, and this headlamp 1 also includes an elliptical concave reflecting mirror 2 similar to the conventional example, and the reflecting mirror 2. a first filament of a first light bulb 3 which is a first light source disposed at a first focal point of the reflecting mirror 2; a projection lens 4 disposed near a second focal point of the reflecting mirror 2; Although a light shielding plate 5 is provided near the focal point of the lens 4,
Further, according to the present invention, the light shielding plate 5 is formed for use in passing beams, and a second light source is provided at a position intermediate between the light shielding plate 5 and the first filament 3a, which is the first light source. The second filament 8a of the second light bulb 6 is arranged so as to be able to blink independently of the first filament 3a which is the first light source, and the elliptical concave reflector A parabolic concave reflector 7.7, such as a paraboloid of revolution, whose focal point is the second filament 6a, is provided on the left and right sides of the headlamp 2, and the light beam from the second filament 6a is directed horizontally to the headlamp 1. The light is reflected in the forward direction as parallel rays. At the same time, in front of the projection lens 4, this projection lens 4
A front lens 8 is provided which is large enough to allow both the light rays from the parabolic concave reflector 7.7 and the light rays from the parabolic concave reflector 7.7 to enter. Lens cut 8a for passing beams to further adjust the light distribution characteristics of passing beams.
A traveling beam lens cut 8b is provided at a position where the light beam from the parabolic concave reflector 7.7 enters to adjust the light distribution characteristics of the traveling beam. 8b has been applied. Incidentally, whether to keep the first filament 3a lit when the second filament 6a is lit or to turn it off can be selected in accordance with the relevant regulations of the destination country, for example.
このように構成した本発明の前照灯１の作用を説明すれ
ば、まず、第一の光源である第一のフィラメント３ａの
みを点灯したときには、この第一のフィラメン）３ａは
楕円系凹面反射鏡２の第一焦点、即ち前記楕円系凹面反
射鏡２の内部となるように配設されていることから、放
物線系凹面反射鏡７．７にこの第一のフィラメント３ａ
からの光束が達することは無く、これにより従来例のプ
ロジェクタ型前照灯と全く同様な作用を成し、このとき
に遮光板５がすれ違いビーム用の形状とされていること
で、この前照灯１から照射される光線はすれ違いビーム
の配光特性となる。
つぎに、第二の光源である第二のフィラメント６ａを点
灯すると、この第二のフィラメント６ａからの光束は前
記楕円系凹面反射鏡２と放物線系凹面反射鏡７．７の双
方で反射されるものとなる。 ここで一方の前記楕円系
凹面反射鏡２に反射する光束はこの反射鏡２の第一、第
三回れの焦点にも前記第二のフィラメント６ａが位置し
ないことから明確なビームを生ずることなく拡散光とな
り、この灯具１の配光特性には何等の寄与もしないもの
となるが、他の一方である放物線系凹面反射鏡７．７に
反射する光束は、前記第二のフィ。
ラメント６ａが焦点にあることで水平方向の平行光線と
なり、前面レンズ８に施された走行ビーム用レンズカッ
ト８ｂ１８ｂにより走行ビームに適する配光特性とされ
るものとなる。To explain the operation of the headlamp 1 of the present invention configured in this way, first, when only the first filament 3a which is the first light source is turned on, this first filament 3a has an elliptic concave reflection. The first filament 3a is located at the first focal point of the mirror 2, that is, inside the elliptic concave reflector 2, so that the first filament 3a is located at the parabolic concave reflector 7.7.
As a result, the light flux from the front light does not reach the projector type headlamp, and the effect is exactly the same as that of a conventional projector type headlamp. The light beam emitted from the lamp 1 has a light distribution characteristic of a passing beam. Next, when the second filament 6a, which is the second light source, is turned on, the light beam from the second filament 6a is reflected by both the elliptical concave reflector 2 and the parabolic concave reflector 7.7. Become something. Here, the light beam reflected on one of the elliptical concave reflecting mirrors 2 is diffused without producing a clear beam because the second filament 6a is not located at the first or third focus of this reflecting mirror 2. Although it becomes light and does not contribute in any way to the light distribution characteristics of this lamp 1, the luminous flux reflected by the other parabolic concave reflector 7.7 is the second beam. Since the lament 6a is at the focal point, the light beam becomes parallel in the horizontal direction, and the lens cut 8b18b for the traveling beam made on the front lens 8 provides a light distribution characteristic suitable for a traveling beam.
以上に説明したように本発明により、従来の構成のプロ
ジェクタ型前照灯に加えて、第一の光源よりも前方であ
り且つすれ違いビーム用に形成された遮光板よりも後方
の位置には前記第一の光源と独立して点滅操作が可能な
第二の光源が配設され、従来の楕円系凹面反射鏡の左右
には前記第二の光源を略焦点とする放物線系凹面反射鏡
が配設され、投影レンズの前方には前記楕円・系凹面反
射鏡と前記放物線系凹面反射鏡との双方からの反射光を
入射させる前面レンズが設けられた構成が付加されたも
のとしたことで、特にすれ違いビーム時の配光特性に優
れるプロジェクタ型前照灯の性能を損なうことなく、一
体の灯具でのすれ違いビームと走行ビームとの切換えを
可能とし、全ての車種に取付可能とするなど、汎用性を
高めると云う優れた効果を奏するものである。As explained above, according to the present invention, in addition to a projector type headlamp having a conventional configuration, the above-mentioned light source is provided at a position forward of the first light source and rearward of the light shielding plate formed for the low beam. A second light source that can be blinked independently of the first light source is disposed, and parabolic concave reflectors with the second light source as the approximate focus are disposed on the left and right sides of the conventional elliptical concave reflector. By adding a configuration in which a front lens is provided in front of the projection lens and allows the reflected light from both the elliptical concave reflector and the parabolic concave reflector to enter, This makes it possible to switch between a passing beam and a driving beam in a single unit without sacrificing the performance of projector-type headlamps, which have excellent light distribution characteristics especially when using a passing beam, and can be installed on all types of vehicles. It has the excellent effect of increasing sex.
第１図は本発明に係るプロジェクタ型前照灯の一実施例
を示す斜視図、第２図は第１図の■−■線に沿う断面図
、第３図は従来例を示す斜視図である。
＠１！！１
■・・・・プロジェクタ型前照灯
２・・・・楕円系凹面反射鏡
３・・・・第一の電球
３ａ・・第一のフィラメント
４・・・・投影レンズ
５・・・・遮光板
６・・・・第二の電球
６ａ・・第二のフィラメント
７・・・・放物線系凹面反射鏡
８・・・・前面レンズ
８ａ・・すれ違いビーム用レンズカット８ｂ・・走行ビ
ーム用レンズカット
第２１！１Fig. 1 is a perspective view showing an embodiment of a projector type headlamp according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a perspective view showing a conventional example. be. @1! ! 1 ■... Projector type headlight 2... Elliptical concave reflector 3... First light bulb 3a... First filament 4... Projection lens 5... Light shielding Plate 6...Second light bulb 6a...Second filament 7...Parabolic concave reflector 8...Front lens 8a...Lens cut for passing beam 8b...Lens cut for traveling beam 21st!1
Claims (1)
の位置に配設された第一の光源と、前記楕円系凹面反射
鏡の略第二焦点の位置に配設された投影レンズと、該投
影レンズの略焦点の位置に配設された遮光板とで成るプ
ロジェクタ型前照灯において、前記第一の光源よりも前
方であり且つすれ違いビーム用に形成された前記遮光板
よりも後方の位置には前記第一の光源と独立して点滅操
作が可能な第二の光源が配設され、前記楕円系凹面反射
鏡の左右には前記第二の光源を略焦点とする放物線系凹
面反射鏡が配設され、前記投影レンズの前方には前記楕
円系凹面反射鏡と前記放物線系凹面反射鏡との双方から
の反射光を入射させる前面レンズが設けられていること
を特徴とするプロジェクタ型前照灯。an elliptical concave reflector; a first light source disposed at approximately a first focal point of the elliptical concave reflector; and a projection disposed at approximately a second focal point of the elliptical concave reflector. In a projector-type headlight comprising a lens and a light shielding plate disposed at a position approximately at the focal point of the projection lens, the light shielding plate is located in front of the first light source and is formed for a passing beam. A second light source that can be blinked independently of the first light source is provided at the rear of the mirror, and a parabola with the second light source as its focal point is formed on the left and right sides of the elliptic concave reflector. A system concave reflector is disposed, and a front lens is provided in front of the projection lens to allow reflected light from both the elliptical concave reflector and the parabolic concave reflector to enter. Projector type headlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63192431A JPH0244601A (en) | 1988-08-01 | 1988-08-01 | Projector type headlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63192431A JPH0244601A (en) | 1988-08-01 | 1988-08-01 | Projector type headlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0244601A true JPH0244601A (en) | 1990-02-14 |
Family
ID=16291197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63192431A Pending JPH0244601A (en) | 1988-08-01 | 1988-08-01 | Projector type headlight |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244601A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5438379A (en) * | 1992-11-25 | 1995-08-01 | Canon Kabushiki Kaisha | Image projection apparatus |
| US5692819A (en) * | 1991-10-21 | 1997-12-02 | Canon Kabushiki Kaisha | Illuminating device and projector utilizing the same |
| JP2007227228A (en) * | 2006-02-24 | 2007-09-06 | Koito Mfg Co Ltd | Lighting fixture unit of vehicular headlight |
-
1988
- 1988-08-01 JP JP63192431A patent/JPH0244601A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5692819A (en) * | 1991-10-21 | 1997-12-02 | Canon Kabushiki Kaisha | Illuminating device and projector utilizing the same |
| US5438379A (en) * | 1992-11-25 | 1995-08-01 | Canon Kabushiki Kaisha | Image projection apparatus |
| JP2007227228A (en) * | 2006-02-24 | 2007-09-06 | Koito Mfg Co Ltd | Lighting fixture unit of vehicular headlight |
| JP4663548B2 (en) * | 2006-02-24 | 2011-04-06 | 株式会社小糸製作所 | Vehicle headlamp lamp unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3553471B2 (en) | Vehicle headlights | |
| JP2575236Y2 (en) | Projector lamp | |
| JP2002109915A (en) | Vehicle headlight | |
| JP3226391B2 (en) | Automotive headlamp | |
| JPH0361961B2 (en) | ||
| JPH0244601A (en) | Projector type headlight | |
| JP2580364Y2 (en) | Variable light distribution lighting | |
| JP3562687B2 (en) | Projector type lamp | |
| JP2558793Y2 (en) | Vehicle headlights | |
| JP3252654B2 (en) | Headlight | |
| JP3508927B2 (en) | head lamp | |
| JPS639921Y2 (en) | ||
| JP2767886B2 (en) | Vehicle headlights | |
| JPH01159902A (en) | Automobile head light | |
| JP2013051032A (en) | Vehicle headlamp system | |
| JPH0514404Y2 (en) | ||
| JP2002093217A (en) | Vehicle light | |
| JPH0443501A (en) | Headlamp device for vehicle | |
| JP3223763B2 (en) | Headlight reflector | |
| JPH05334902A (en) | Projector lamp for vehicle | |
| JPS6254201B2 (en) | ||
| JPH03184201A (en) | Projector type headlight | |
| JPH0337246B2 (en) | ||
| JPH0251201B2 (en) | ||
| JP2000299009A (en) | Vehicle lighting fixture |