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JP5358118B2 - Vehicle headlamp - Google Patents

Vehicle headlamp Download PDF

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Publication number
JP5358118B2
JP5358118B2 JP2008109011A JP2008109011A JP5358118B2 JP 5358118 B2 JP5358118 B2 JP 5358118B2 JP 2008109011 A JP2008109011 A JP 2008109011A JP 2008109011 A JP2008109011 A JP 2008109011A JP 5358118 B2 JP5358118 B2 JP 5358118B2
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Japan
Prior art keywords
light
vehicle
reflector
shielding plate
shielding
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Expired - Fee Related
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JP2008109011A
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JP2009259689A (en
Inventor
悠司 桑島
博 植松
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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    • 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
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/692—Shields, i.e. screens not creating an image meant to be projected
    • 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
    • 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
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • 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
    • F21S41/40—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
    • 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
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve the light use efficiency of the light source of a vehicle headlight. <P>SOLUTION: The vehicular headlight 1 includes a bulb 2, and a shielding plate 12 selectively changeable over between a shielding condition of partially shielding a light path from the bulb 2 to the front upper side of a vehicle and a non-shielding condition of not shielding it. Herein, there are provided a lateral reflector 7 for guiding light to the front lateral side of the vehicle and a guide reflector 6 for guiding part of the light from the bulb 2 to the lateral reflector 7. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

この発明は、車両用前照灯に関するものである。   The present invention relates to a vehicle headlamp.

車両の前照灯は、一般に、車両の近くの走行路面を照らすＬｏビームモードと、遠方まで照らすＨｉビームモードとに切り換えることができるように構成されている。
例えば、特許文献１には、Ｌｏビーム用ランプとＨｉビーム用ランプを備え、ＬｏビームモードではＬｏビーム用ランプのみが点灯し、ＨｉビームモードではＬｏビーム用ランプとＨｉビーム用ランプが同時に点灯するように構成された車両用前照灯が記載されている。 A vehicle headlamp is generally configured to be switchable between a Lo beam mode that illuminates a road surface near the vehicle and a Hi beam mode that illuminates far.
For example, Patent Document 1 includes a Lo beam lamp and a Hi beam lamp. In the Lo beam mode, only the Lo beam lamp is lit, and in the Hi beam mode, the Lo beam lamp and the Hi beam lamp are lit simultaneously. A vehicular headlamp configured as described above is described.

また、近年では、光路の一部を遮蔽可能にする遮蔽板を備え、ＬｏビームモードとＨｉビームモードのいずれのモードのときにも同じ光源が点灯し、Ｌｏビームモードでは、遮蔽板によって光源から車両前上方へ向かう光路を部分的に遮蔽し、Ｈｉビームモードでは、遮蔽板による光路の遮蔽を解除して車両前上方へも光を照射するように構成した車両用前照灯も実用化されている。
特許第３９１１８６３号公報 Further, in recent years, a shielding plate that can shield a part of the optical path is provided, and the same light source is turned on in both the Lo beam mode and the Hi beam mode. A vehicular headlamp configured to partially shield the light path toward the front upper side of the vehicle and irradiate light to the front upper side of the vehicle by releasing the shielding of the light path by the shielding plate in the Hi beam mode is also put into practical use. ing.
Japanese Patent No. 3911863

しかしながら、従来の遮蔽板を備えた車両用前照灯では、光源の光の利用率が低く、無駄にしていた光が多くあった。例えば、Ｌｏビームモード時に遮蔽板によって遮蔽された光は、利用されることなく無駄となる。
そこで、この発明は、光源の光の利用率を向上させるとともに、使い勝手のよい車両用前照灯を提供するものである。 However, in the vehicle headlamp provided with the conventional shielding plate, the light utilization rate of the light source is low, and much light is wasted. For example, the light shielded by the shielding plate in the Lo beam mode is wasted without being used.
Accordingly, the present invention provides a vehicular headlamp that improves the light utilization rate of the light source and is easy to use.

この発明に係る車両用前照灯では、上記課題を解決するために以下の手段を採用した。
請求項１に係る発明は、光源（例えば、後述する実施例におけるバルブ２）と、前記光源からの光を車両前方へ誘導するメインリフレクタ（例えば、後述する実施例におけるメインリフレクタ５）と、前記光源から前記メインリフレクタで反射して車両前上方へ向かう光路を部分的に遮蔽する遮蔽状態および遮蔽しない非遮蔽状態に選択的に切り換え可能な遮蔽板（例えば、後述する実施例における遮蔽板１２）と、を備えた車両用前照灯（例えば、後述する実施例における車両用前照灯１）であって、光を車両前側方へ誘導する側方用リフレクタ（例えば、後述する実施例における側方用リフレクタ７）と、前記メインリフレクタの上部前端に連なって形成され、前記光源からの光の一部を前記側方用リフレクタへ誘導する誘導リフレクタ（例えば、後述する実施例における誘導リフレクタ６）と、を備え、前記遮蔽板の遮蔽面が鏡面（例えば、後述する実施例における鏡面１２ａ）で形成されていて、該遮蔽板は、前記遮蔽状態としたときに、前記メインリフレクタの下半部で反射した前記光源からの光を遮蔽するとともに前記遮蔽面で反射させて前記側方用リフレクタへ誘導し、前記側方用リフレクタのみに、暗所での視認性が高い緑色域の波長選択性を備える波長選択性フィルタを配置したことを特徴とする車両用前照灯である。 The vehicle headlamp according to the present invention employs the following means in order to solve the above problems.
The invention according to claim 1 includes a light source (for example, a bulb 2 in an embodiment described later), a main reflector for guiding light from the light source forward of the vehicle (for example, a main reflector 5 in an embodiment described later), A shielding plate that can be selectively switched between a shielding state in which the light path reflected from the light source by the main reflector and directed upward in front of the vehicle is partially shielded and a non-shielding state in which the light path is not shielded (for example, a shielding plate 12 in an embodiment described later) A vehicle headlamp (for example, a vehicle headlamp 1 in an embodiment described later), and a side reflector (for example, a side in an embodiment described later) that guides light toward the vehicle front side. Direction reflector 7) and an induction reflector formed to be connected to the upper front end of the main reflector and guide a part of light from the light source to the side reflector For example, a guidance reflector 6) in an embodiment described later is provided, and the shielding surface of the shielding plate is formed as a mirror surface (for example, a mirror surface 12a in the embodiment described later), and the shielding plate is in the shielding state. The light reflected from the lower half of the main reflector is shielded and reflected by the shielding surface and guided to the side reflector, and only to the side reflector in the dark. The vehicle headlamp is characterized in that a wavelength-selective filter having a wavelength selectivity in the green region with high visibility is arranged.

請求項２に係る発明は、請求項１に記載の発明において、前記遮蔽板を非遮蔽状態に切り換えた場合に、前記誘導リフレクタから前記側方用リフレクタへの光路を遮蔽する副遮蔽板（例えば、後述する実施例における副遮蔽板１６）を備えることを特徴とする。 According to a second aspect of the present invention, in the first aspect of the present invention, when the shielding plate is switched to a non-shielding state, an auxiliary shielding plate that shields an optical path from the guide reflector to the side reflector (for example, The sub-shielding plate 16) in the embodiments to be described later is provided.

請求項１に係る発明によれば、単一の光源の光で、車両前方だけでなく、車両に近い前側方を照明することができ、前方の視認性を悪化させることなく、前側方に対する視認性を向上することができる。
特に、遮蔽板を遮蔽状態とするＬｏビーム時には、誘導リフレクタで反射した光源の光で車両前方の左側方または右側方を照らすことができることに加えて、遮蔽板で遮蔽された光源の光で車両前方の左側方または右側方を照らすことができるので、Ｌｏビーム時の車両前側方を照らす光量を増加することができ、車両前側方をより明るく照らすことができる。
また、暗所での視認性の高い緑色域の波長選択性を備えた波長選択性フィルタを設けることによって、車両の斜め前側方を照らす光を緑色系の色にし、夜間やトンネル内など暗所において車両の斜め前側方の視認性を向上させることができる。 According to the first aspect of the present invention, not only the front of the vehicle but also the front side close to the vehicle can be illuminated with light from a single light source, and the front side can be visually recognized without deteriorating the front visibility. Can be improved.
In particular, at the time of the Lo beam in which the shielding plate is shielded, the vehicle can be illuminated with the light of the light source shielded by the shielding plate in addition to being able to illuminate the left or right side of the vehicle front with the light of the light source reflected by the guide reflector. Since the front left side or the right side can be illuminated, the amount of light that illuminates the front side of the vehicle during the Lo beam can be increased, and the front side of the vehicle can be illuminated more brightly.
In addition, by providing a wavelength-selective filter with a wavelength selectivity in the green range that is highly visible in the dark, the light that illuminates the front side of the vehicle is converted to a green color, making it possible to use dark areas such as at night or in tunnels. Thus, the visibility of the oblique front side of the vehicle can be improved.

請求項２に係る発明によれば、Ｈｉビーム時に車両に近い前側方を照らさないようにすることができ、その結果、Ｈｉビーム時に自車両の運転者に前方を積極的に注視させることができるとともに、車両の斜め前側方にいる歩行者などを眩惑させるのを防止することができる。 According to the second aspect of the present invention, it is possible to prevent the front side near the vehicle from being illuminated at the time of the Hi beam, and as a result, it is possible to cause the driver of the own vehicle to actively watch the front at the time of the Hi beam. At the same time, it is possible to prevent a pedestrian or the like that is on the diagonally front side of the vehicle from being dazzled.

以下、この発明に係る車両用前照灯の実施例を図５、図８、図９の図面を参照して説明する。
＜参考例１＞
初めに、この発明に係る車両用前照灯に関連する技術の参考例１を図１から図４の図面を参照して説明する。
図１、図３に示すように、車両用前照灯１は、光源としてのハロゲンランプからなる単一のバルブ２を備え、バルブ２を支持する口金３がランプハウジング４に固定されている。 Hereinafter, an embodiment of a headlamp for a vehicle according to the present invention FIG. 5, FIG. 8, will be described with reference to the drawings of FIG.
< Reference Example 1>
First , Reference Example 1 of a technique related to a vehicle headlamp according to the present invention will be described with reference to the drawings of FIGS.
As shown in FIGS. 1 and 3, the vehicle headlamp 1 includes a single bulb 2 made of a halogen lamp as a light source, and a base 3 that supports the bulb 2 is fixed to a lamp housing 4.

ランプハウジング４は樹脂製で、ランプハウジング４の前面は、バルブ２の周囲を覆う凹曲面に形成されるとともに、鏡面に形成されており、バルブ２の光を反射させてバルブ２の前方に集光するメインリフレクタ５とされている。
また、ランプハウジング４は、メインリフレクタ５の上部前端に連なって形成された誘導リフレクタ６と、メインリフレクタ５の下部前端に連なって形成された側方用リフレクタ７とを備えている。誘導リフレクタ６と側方用リフレクタ７はいずれも凹曲面に形成されるとともに鏡面に形成されている。 The lamp housing 4 is made of resin, and the front surface of the lamp housing 4 is formed in a concave curved surface that covers the periphery of the bulb 2 and is formed in a mirror surface, and reflects the light from the bulb 2 to collect it in front of the bulb 2. The main reflector 5 shines.
In addition, the lamp housing 4 includes a guide reflector 6 formed continuously with the upper front end of the main reflector 5 and a side reflector 7 formed continuously with the lower front end of the main reflector 5. Both the guide reflector 6 and the side reflector 7 are formed in a concave curved surface and a mirror surface.

誘導リフレクタ６はバルブ２から照射された光を側方用リフレクタ７に向けて反射するように構成されており、側方用リフレクタ７は誘導リフレクタ６から入射した光を車両に近い斜め前側方へ反射するように構成されている。例えば、車両の左側に設置された前照灯１の場合には、側方用リフレクタ７で反射した光は車両の左前方を照らし、車両の右側に設置された前照灯１の場合には、側方用リフレクタ７で反射した光は車両の右前方を照らす。   The guide reflector 6 is configured to reflect the light emitted from the bulb 2 toward the side reflector 7, and the side reflector 7 transmits the light incident from the guide reflector 6 obliquely forward to the side close to the vehicle. It is configured to reflect. For example, in the case of the headlamp 1 installed on the left side of the vehicle, the light reflected by the side reflector 7 illuminates the left front of the vehicle, and in the case of the headlamp 1 installed on the right side of the vehicle The light reflected by the side reflector 7 illuminates the right front of the vehicle.

バルブ２およびランプハウジング４の前方には遮蔽板支持フレーム８が配置されており、遮蔽板支持フレーム８のさらに前方にプロジェクターレンズ９が配置されている。
遮蔽板支持フレーム８の略中央には開口１０が設けられており、メインリフレクタ５で反射したバルブ２の光は開口１０の近傍で集光し、開口１０を通過して再び拡散し、プロジェクターレンズ９に入射する。換言すると、メインリフレクタ５で反射した光がそのような光路となるように、メインリフレクタ５の凹曲面が設計され、遮蔽板支持フレーム８およびプロジェクターレンズ９の位置が設定されている。
プロジェクターレンズ９は前方に凸の略半球状をなし、筒状のレンズフレーム１１に支持されている。メインリフレクタ５で反射した光はプロジェクターレンズ９で屈折し、ほぼ平行光となってプロジェクターレンズ９から出射し、車両前方に進む。 A shielding plate support frame 8 is disposed in front of the bulb 2 and the lamp housing 4, and a projector lens 9 is disposed in front of the shielding plate support frame 8.
An opening 10 is provided substantially at the center of the shielding plate support frame 8, and the light of the bulb 2 reflected by the main reflector 5 is collected near the opening 10, passes through the opening 10, and is diffused again. 9 is incident. In other words, the concave curved surface of the main reflector 5 is designed so that the light reflected by the main reflector 5 has such an optical path, and the positions of the shielding plate support frame 8 and the projector lens 9 are set.
The projector lens 9 has a substantially hemispherical shape convex forward and is supported by a cylindrical lens frame 11. The light reflected by the main reflector 5 is refracted by the projector lens 9, becomes almost parallel light, exits from the projector lens 9, and travels forward of the vehicle.

遮蔽板支持フレーム８には、光の透過を完全に遮断する材料からなる遮蔽板１２が、開口１０の下部近傍を回転中心Ｏとして回動可能に支持されている。遮蔽板１２は一端側が回転中心Ｏに配置され、他端側がバルブ２に接近する方向に延びている。この遮蔽板１２は、図１に示される後方傾斜姿勢から、図３に示される略水平な姿勢までの間で回動可能であり、遮蔽板１２を図１に示す後方傾斜姿勢にすると（以下、この状態を遮蔽状態という）、メインリフレクタ５の下半部で反射して前上方へ向かって進む光が遮蔽板１２によって遮蔽されて開口１０への通過が阻止され、遮蔽板１２を図３に示す略水平姿勢にすると（以下、この状態を非遮蔽状態という）、メインリフレクタ５の下半部で反射して前上方へ向かって進む光は遮蔽板１２によって遮蔽されず、開口１０を通過して前方へ進む。
つまり、遮蔽板１２は遮蔽状態と非遮蔽状態に選択的に切り換えることができ、遮蔽状態にすると、バルブ２から車両前上方へ向かう光路が部分的に遮蔽される。 A shielding plate 12 made of a material that completely blocks transmission of light is supported on the shielding plate support frame 8 so as to be rotatable about a lower center of the opening 10 as a rotation center O. One end side of the shielding plate 12 is disposed at the rotation center O, and the other end side extends in a direction approaching the valve 2. The shielding plate 12 can be rotated from the rearward inclined posture shown in FIG. 1 to the substantially horizontal posture shown in FIG. 3, and when the shielding plate 12 is in the rearward inclined posture shown in FIG. This state is referred to as a shielded state). Light that is reflected by the lower half portion of the main reflector 5 and travels forward and upward is shielded by the shield plate 12 and is prevented from passing through the opening 10. (Hereinafter, this state is referred to as an unshielded state), the light reflected by the lower half of the main reflector 5 and traveling forward and upward is not shielded by the shielding plate 12 and passes through the opening 10. And go forward.
That is, the shielding plate 12 can be selectively switched between a shielding state and a non-shielding state. When the shielding plate 12 is in the shielding state, the optical path from the bulb 2 to the front upper side of the vehicle is partially shielded.

なお、メインリフレクタ５の上半部で反射して前下方へ向かって進む光は、遮蔽板１２が遮蔽状態であっても非遮蔽状態であっても、遮蔽板１２によって遮蔽されず、開口１０を通過して前方へ進むことができるように構成されている。   The light reflected by the upper half of the main reflector 5 and traveling forward and downward is not shielded by the shielding plate 12 regardless of whether the shielding plate 12 is in the shielding state or in the non-shielding state, and the opening 10 It is comprised so that it can advance ahead through.

また、遮蔽板支持フレーム８の下部には、遮蔽板１２を回転駆動するアクチュエータ１３が固定されている。アクチュエータ１３は図示しない制御装置からの制御信号に基づいて制御され、例えば、Ｌｏビームモード信号に基づいて遮蔽板１２が遮蔽状態となるようにアクチュエータ１３を作動し、Ｈｉビームモード信号に基づいて遮蔽板１２が非遮蔽状態となるようにアクチュエータ１３を作動する。なお、アクチュエータ１３は、ソレノイド、ステッピングモータなどで構成することができ、その構成に応じて、アクチュエータ１３と遮蔽板１２を適宜の手段（例えば、ギヤやリンクなど）で連係すればよい。   An actuator 13 that rotationally drives the shielding plate 12 is fixed to the lower portion of the shielding plate support frame 8. The actuator 13 is controlled based on a control signal from a control device (not shown). For example, the actuator 13 is operated so that the shielding plate 12 is in a shielding state based on the Lo beam mode signal, and is shielded based on the Hi beam mode signal. The actuator 13 is operated so that the plate 12 is in a non-shielding state. The actuator 13 can be configured by a solenoid, a stepping motor, or the like, and the actuator 13 and the shielding plate 12 may be linked by appropriate means (for example, a gear or a link) according to the configuration.

なお、プロジェクターレンズ９とレンズフレーム１１の下側、および、アクチュエータ１３と遮蔽板支持フレーム８の下側には、開口部１４が形成されており、この開口部１４によって、側方用リフレクタ７で反射した光が車両の斜め前側方に向かって進む光路が確保されている。
また、ランプハウジング４と遮蔽板支持フレーム８とレンズフレーム１１は、図示しない前照灯ユニットフレームに固定されており、相対移動不能とされている。 An opening 14 is formed on the lower side of the projector lens 9 and the lens frame 11 and on the lower side of the actuator 13 and the shielding plate support frame 8, and the side reflector 7 is formed by the opening 14. An optical path is ensured in which the reflected light travels toward the diagonally front side of the vehicle.
Further, the lamp housing 4, the shielding plate support frame 8, and the lens frame 11 are fixed to a headlamp unit frame (not shown) and are not relatively movable.

このように構成された車両用前照灯１においては、Ｌｏビームモードのときには、図１に示すように遮蔽板１２が遮蔽状態とされる。このときには、メインリフレクタ５の上半部で反射して前下方へ向かって進む光は、遮蔽板１２が遮蔽状態であっても遮蔽板１２によって遮蔽されず、開口１０を通過して前方へ進むことができるが、メインリフレクタ５の下半部で反射して前上方へ向かって進む光は遮蔽板１２によって遮蔽され、開口１０を通過することができない。その結果、図２に示すように、メインリフレクタ５で反射したバルブ２の光Ｐ１は、車両Ｖに近い前方の走行路面を照らし、遠方を照らさないので、対向車両の乗員を眩惑させるのを防止することができる。   In the vehicle headlamp 1 configured as described above, the shielding plate 12 is in a shielding state as shown in FIG. 1 in the Lo beam mode. At this time, the light reflected by the upper half of the main reflector 5 and traveling forward and downward is not shielded by the shielding plate 12 even when the shielding plate 12 is in the shielding state, and travels forward through the opening 10. However, the light reflected by the lower half of the main reflector 5 and traveling forward and upward is blocked by the shielding plate 12 and cannot pass through the opening 10. As a result, as shown in FIG. 2, the light P <b> 1 of the bulb 2 reflected by the main reflector 5 illuminates the front road surface close to the vehicle V and does not illuminate the distance, thus preventing the oncoming vehicle occupant from being dazzled. can do.

また、誘導リフレクタ６で反射した光は側方用リフレクタ７へ誘導され、側方用リフレクタ７で反射して開口部１４を通り、車両の斜め前側方に向かって進む。その結果、図２に示すように、誘導リフレクタ６で反射したバルブ２の光Ｐ２で、車両Ｖに近い前方の左側方または右側方を照らすことができる。   Further, the light reflected by the guide reflector 6 is guided to the side reflector 7, reflected by the side reflector 7, passes through the opening 14, and proceeds toward the oblique front side of the vehicle. As a result, as shown in FIG. 2, the front left side or the right side close to the vehicle V can be illuminated with the light P <b> 2 of the bulb 2 reflected by the induction reflector 6.

一方、Ｈｉビームモードのときには、図３に示すように遮蔽板１２が非遮蔽状態とされる。このときには、遮蔽板１２が非遮蔽状態であるので、メインリフレクタ５の上半部で反射して前下方へ向かって進む光も、メインリフレクタ５の下半部で反射して前上方へ向かって進む光も、遮蔽板１２によって遮蔽されず、開口１０を通過して前方へ進むことができる。その結果、図４に示すように、メインリフレクタ５で反射したバルブ２の光Ｐ３は、車両Ｖの前方を遠方まで照らすことができる。   On the other hand, in the Hi beam mode, the shielding plate 12 is not shielded as shown in FIG. At this time, since the shielding plate 12 is in a non-shielding state, the light reflected by the upper half of the main reflector 5 and traveling forward and downward is also reflected by the lower half of the main reflector 5 and travels forward and upward. The traveling light is not shielded by the shielding plate 12 but can travel forward through the opening 10. As a result, as shown in FIG. 4, the light P <b> 3 of the bulb 2 reflected by the main reflector 5 can illuminate the front of the vehicle V far.

また、Ｈｉビームモードのときにも、誘導リフレクタ６で反射した光は側方用リフレクタ７へ誘導され、側方用リフレクタ７で反射して開口部１４を通り、車両の斜め前側方に向かって進む。その結果、図４に示すように、Ｌｏビームモードのときと同様に、誘導リフレクタ６で反射したバルブ２の光Ｐ２は、車両Ｖに近い前方の左側方または右側方を照らすことができる。   Also in the Hi beam mode, the light reflected by the guide reflector 6 is guided to the side reflector 7, reflected by the side reflector 7, passes through the opening portion 14, and obliquely toward the front side of the vehicle. move on. As a result, as shown in FIG. 4, the light P <b> 2 of the bulb 2 reflected by the guide reflector 6 can illuminate the front left side or the right side near the vehicle V, as in the Lo beam mode.

ところで、バルブ２から誘導リフレクタ６の方向に進む光は従来は車両の前方へ照射されず無駄な光であったが、この車両用前照灯１では、誘導リフレクタ６の方向に進む光を車両に近い前側方を照らす光として利用している。したがって、従来よりもバルブ２の光の利用率が大きく、バルブ２の光を有効に利用することができる。   By the way, the light traveling in the direction from the bulb 2 to the induction reflector 6 has been conventionally wasted light without being irradiated to the front of the vehicle. In this vehicle headlamp 1, the light traveling in the direction of the induction reflector 6 is transmitted to the vehicle. It is used as light to illuminate the front side close to. Therefore, the light utilization rate of the bulb 2 is greater than in the prior art, and the bulb 2 light can be used effectively.

また、誘導リフレクタ６の反射面または側方用リフレクタ７の反射面に、暗所での視認性の高い緑色域の波長選択性を備えた波長選択性フィルタを設けることによって、車両の斜め前側方を照らす光を緑色系の色にし、夜間やトンネル内など暗所において車両の斜め前側方の視認性を向上させることもできる。これは夜間での右左折時に特に効果がある。
図１６は、光の波長と比視感度の関係を示す比視感度特性図であり、明るい場所（明所）では波長５５５ｎｍの光に対する比視感度が最大となるが、暗い場所（暗所）では波長５０７ｎｍの光に対する比視感度が最大となる。したがって、前記波長選択性フィルタは、波長５０７ｎｍ付近の光を選択するフィルタとするのが好ましい。 Further, by providing a wavelength selective filter having a wavelength selectivity in a green region with high visibility in a dark place on the reflective surface of the induction reflector 6 or the reflective surface of the side reflector 7, the vehicle can be seen diagonally forward. The light that illuminates the vehicle can be made into a greenish color, and the visibility of the front side of the vehicle in a dark place such as at night or in a tunnel can be improved. This is particularly effective when turning left and right at night.
FIG. 16 is a characteristic characteristic diagram showing the relationship between the wavelength of light and the relative luminous efficiency. In a bright place (in a bright place), the relative visibility for light having a wavelength of 555 nm is maximized, but in a dark place (in a dark place). Then, the relative visibility with respect to light having a wavelength of 507 nm is maximized. Therefore, it is preferable that the wavelength selective filter is a filter that selects light in the vicinity of a wavelength of 507 nm.

＜実施例１＞
次に、この発明に係る車両用前照灯の実施例１を図５の図面を参照して説明する。
実施例１の車両用前照灯１の基本的構成は参考例１と同じであるので、同一構成については図中同一態様部分に同一符号を付して説明を省略し、参考例１との相違点のみ説明する。
実施例１の車両用前照灯１では、遮蔽板１２の遮蔽面が鏡面１２ａに形成されている。そして、遮蔽板１２を遮蔽状態としたときに、メインリフレクタ５の下半部で反射して前上方へ向かって進んできた光を、鏡面１２ａが側方用リフレクタ７へ向かって反射させるように構成されている。さらに、この光は側方用リフレクタ７で反射して開口部１４を通り、車両の斜め前側方に向かって進むように構成されている。つまり、実施例１の車両用前照灯１では、誘導リフレクタ６は第１の誘導リフレクタであり、遮蔽板１２の鏡面１２ａは第２の誘導リフレクタであると言うことができる。 <Example 1 >
Next, Embodiment 1 of the vehicle headlamp according to the present invention will be described with reference to the drawing of FIG.
Since the basic configuration of the vehicle headlamp 1 of the first embodiment is the same as in Reference Example 1, the same configuration is omitted will be denoted by the same reference numerals to the same embodiment parts in the drawings, the reference example 1 Only the differences will be described.
In the vehicle headlamp 1 of the first embodiment, the shielding surface of the shielding plate 12 is formed on the mirror surface 12a. Then, when the shielding plate 12 is in a shielding state, the mirror surface 12a reflects the light reflected from the lower half of the main reflector 5 and traveling forward and upward toward the side reflector 7. It is configured. Further, the light is reflected by the side reflector 7, passes through the opening portion 14, and travels toward an oblique front side of the vehicle. That is, in the vehicle headlamp 1 of the first embodiment, it can be said that the guide reflector 6 is a first guide reflector, and the mirror surface 12a of the shielding plate 12 is a second guide reflector.

このように構成された実施例１の車両用前照灯１によれば、Ｌｏビームモードのときには、誘導リフレクタ６で反射したバルブ２の光で、車両に近い前方の左側方または右側方を照らすことができることに加えて、遮蔽板１２で遮蔽されたバルブ２の光で車両Ｖに近い前方の左側方または右側方を照らすことができる。その結果、Ｌｏビームモードのときに車両前側方を照らす光量を増加することができ、車両前側方をより明るくすることができる。 According to the vehicle headlamp 1 of the first embodiment configured as described above, in the Lo beam mode, the light of the bulb 2 reflected by the guide reflector 6 illuminates the left side or the right side in front of the vehicle. In addition to being able to illuminate, it is possible to illuminate the front left side or the right side near the vehicle V with the light of the bulb 2 shielded by the shielding plate 12. As a result, the amount of light that illuminates the front side of the vehicle in the Lo beam mode can be increased, and the front side of the vehicle can be made brighter.

ところで、遮蔽板１２で遮蔽された光は参考例１では車両の前方へ照射されず無駄な光となるが、この実施例１の車両用前照灯１では、遮蔽板１２で遮蔽された光を車両に近い前方の側方を照らす光として利用している。したがって、実施例１の車両用前照灯１は参考例１よりもバルブ２の光の利用率が大きく、バルブ２の光をさらに有効に利用することができる。 By the way, the light shielded by the shielding plate 12 becomes useless light in the reference example 1 without being irradiated to the front of the vehicle. However, in the vehicle headlamp 1 of the first embodiment, the light shielded by the shielding plate 12 is used. Is used as light to illuminate the front side near the vehicle. Therefore, the vehicle headlamp 1 of the first embodiment has a higher light utilization rate of the bulb 2 than that of the first reference example, and can more effectively utilize the light of the bulb 2.

この実施例１の場合には、誘導リフレクタ６の反射面と遮蔽板１２の鏡面１２ａ、または側方用リフレクタ７の反射面に、暗所での視認性の高い緑色域の波長選択性を備えた波長選択性フィルタを設けることによって、車両の斜め前側方を照らす光を緑色系の色にし、夜間やトンネル内など暗所において車両の斜め前側方の視認性を向上させることができる。 In the case of the first embodiment, the reflective surface of the induction reflector 6 and the mirror surface 12a of the shielding plate 12 or the reflective surface of the side reflector 7 have wavelength selectivity in the green region with high visibility in a dark place. By providing the wavelength selective filter, the light that illuminates the oblique front side of the vehicle has a green color, and the visibility of the oblique front side of the vehicle can be improved in a dark place such as at night or in a tunnel.

＜参考例２＞
次に、この発明に係る車両用前照灯に関連する技術の参考例２を図６、図７の図面を参照して説明する。
参考例２の車両用前照灯１の基本的構成は参考例１と同じであるので、同一構成については図中同一態様部分に同一符号を付して説明を省略し、参考例１との相違点のみ説明する。 < Reference Example 2 >
Next, a reference example 2 of a technique related to the vehicle headlamp according to the present invention will be described with reference to the drawings of FIGS.
Since the basic configuration of the headlamp 1 for a vehicle of Example 2 is the same as in Reference Example 1, the same configuration is omitted will be denoted by the same reference numerals to the same embodiment parts in the drawings, the reference example 1 Only the differences will be described.

参考例１の車両用前照灯１においては、遮蔽板１２を光を完全に遮断する材料で構成したが、参考例２の車両用前照灯１では、遮蔽板１２を、光の一部を遮断し、他は透過させる透光性を有する材料で構成する。
例えば、遮蔽板１２を半透明の材料で構成することにより、遮蔽板１２を遮蔽状態としたときに、メインリフレクタ５の下半部で反射して前上方へ向かって進む光の一部が遮蔽板１２を透過することができるようにする。このようにすると、遮蔽板１２を透過した一部の光は、開口１０を通過し、プロジェクターレンズ９を通って、車両前方へ進むので、図７に示すように、この光Ｐ４によって車両前方の遠方を照らすことができる。このときの遠方を照らす光量は、遮蔽板１２を非遮蔽状態としたときに遠方を照らすときの光量（図４参照）よりも少なく、したがって、この光が対向車両の乗員を眩惑させることはない。
この場合、半透明の材料で構成された遮蔽板１２は、光の一部を遮断する波長選択フィルタを構成する。
このようにすると、Ｌｏビームモードのときにも車両前方の遠方を対向車両の運転者を眩惑させずに照明することができ、Ｌｏビームモード時の遠方視認性が向上する。 In the vehicular headlamp 1 of the reference example 1 , the shielding plate 12 is made of a material that completely blocks light. However, in the vehicular headlamp 1 of the reference example 2 , the shielding plate 12 has a portion of the light. It is made of a light-transmitting material that blocks light and transmits others.
For example, when the shielding plate 12 is made of a translucent material, when the shielding plate 12 is put in a shielding state, a part of the light that is reflected by the lower half portion of the main reflector 5 and travels forward and upward is shielded. It can be transmitted through the plate 12. In this way, a part of the light transmitted through the shielding plate 12 passes through the opening 10, passes through the projector lens 9, and travels forward of the vehicle. Therefore, as shown in FIG. Can illuminate far away. The amount of light that illuminates far away at this time is less than the amount of light that illuminates far away when the shielding plate 12 is in the non-shielding state (see FIG. 4), and therefore this light does not dazzle the passengers of the oncoming vehicle. .
In this case, the shielding plate 12 made of a translucent material constitutes a wavelength selection filter that blocks part of the light.
In this way, even in the Lo beam mode, it is possible to illuminate the distance ahead of the vehicle without dazzling the driver of the oncoming vehicle, and the distance visibility in the Lo beam mode is improved.

あるいは、遮蔽板１２を、対向車両の乗員を眩惑させ難い色に着色された透明な材料で構成することにより、遮蔽板１２を遮蔽状態としたときに、メインリフレクタ５の下半部で反射して前上方へ向かって進む光が遮蔽板１２を透過することができるようにするとともに、透過した光を対向車両の乗員が眩惑し難い色に着色する。このようにすると、遮蔽板１２を透過した光は、開口１０を通過し、プロジェクターレンズ９を通って、車両前方へ進むので、図７に示すように、この光Ｐ４によって車両前方の遠方を照らすが、この光は対向車両の乗員が眩惑し難い色となっているので、対向車両の乗員を眩惑させることはない。
なお、対向車両の乗員を眩惑させ難い色とは、例えば、波長４３５ｎｍ〜５６０ｎｍの青色〜緑色系を例示することができる。
このようにしても、Ｌｏビームモードのときに車両前方の遠方を対向車両の運転者を眩惑させずに照明することができ、Ｌｏビームモード時の遠方視認性が向上する。 Alternatively, the shielding plate 12 is made of a transparent material colored in a color that is difficult to dazzle oncoming passengers, so that the shielding plate 12 is reflected at the lower half of the main reflector 5 when the shielding plate 12 is in a shielding state. Thus, the light traveling forward and upward can be transmitted through the shielding plate 12, and the transmitted light is colored in a color that is difficult for the passengers of the oncoming vehicle to dazzle. In this way, the light transmitted through the shielding plate 12 passes through the opening 10, passes through the projector lens 9, and travels forward in the vehicle. Therefore, as shown in FIG. However, this light does not dazzle the occupant of the oncoming vehicle because it is a color that makes it difficult for the occupant of the oncoming vehicle to dazzle.
In addition, the color which is hard to dazzle the passenger | crew of an oncoming vehicle can illustrate the blue-green type | system | group of wavelength 435nm -560nm, for example.
Even in this case, it is possible to illuminate the distance ahead of the vehicle in the Lo beam mode without dazzling the driver of the oncoming vehicle, and the distance visibility in the Lo beam mode is improved.

なお、参考例２の車両用前照灯１においても、誘導リフレクタ６の反射面または側方用リフレクタ７の反射面に、暗所での視認性の高い緑色域の波長選択性を備えた波長選択性フィルタを設けることによって、車両の斜め前側方を照らす光を緑色系の色にし、夜間やトンネル内など暗所において車両の斜め前側方の視認性を向上させることができる。 In the vehicle headlamp 1 of Reference Example 2 as well, a wavelength having a wavelength selectivity in the green region with high visibility in a dark place on the reflective surface of the guide reflector 6 or the reflective surface of the side reflector 7. By providing the selectivity filter, the light that illuminates the oblique front side of the vehicle has a green color, and the visibility of the oblique front side of the vehicle can be improved in a dark place such as at night or in a tunnel.

＜実施例２＞
次に、この発明に係る車両用前照灯の実施例２を図８、図９の図面を参照して説明する。
実施例２の車両用前照灯１の基本的構成は実施例１と同じであるので、同一構成については図中同一態様部分に同一符号を付して説明を省略し、実施例１との相違点のみ説明する。
実施例２の車両用前照灯１では、実施例１の車両用前照灯１の構成に加えて、遮蔽板支持フレーム８の下部に、サポート１５を介して、光を完全に遮断する材料からなる副遮蔽板１６が取り付けられている。副遮蔽板１６はサポート１５の先部に回動可能に設置されており、図示しないアクチュエータによって姿勢制御されるように構成されている。 <Example 2>
Next, a second embodiment of the vehicle headlamp according to the present invention will be described with reference to the drawings of FIGS.
Since the basic configuration of a prior vehicle of Example 2 headlight 1 is the same as in Example 1, the same configuration is omitted will be denoted by the same reference numerals to the same embodiment parts in the drawings, the first embodiment Only the differences will be described.
Material in the vehicle headlamp 1 of the embodiment 2, in addition to the configuration of the vehicle headlamp 1 of the first embodiment, the lower portion of the shielding plate support frame 8, via a support 15 to completely block light A sub shielding plate 16 is attached. The auxiliary shielding plate 16 is rotatably installed at the front portion of the support 15 and is configured to be controlled in posture by an actuator (not shown).

そして、Ｈｉビームモードのときに副遮蔽板１６は図８に示すように水平姿勢とされ、誘導リフレクタ６で反射し側方用リフレクタ７へ向かう光路を遮断するように構成されている。このようにすると、Ｈｉビームモード時には、車両の斜め前側方を照明しなくなり、図９に示すように、車両Ｖの前方の遠方を照明する光Ｐ５だけとすることができる。その結果、車両の斜め前側方を照らす光による煩わしさを軽減することができ、自車両の運転者に前方を積極的に注視させることができる。また、車両の斜め前側方にいる歩行者などを眩惑させるのを防止することができる。   In the Hi beam mode, the sub-shielding plate 16 is in a horizontal posture as shown in FIG. 8 and is configured to block the optical path reflected by the guide reflector 6 and directed to the side reflector 7. In this way, in the Hi beam mode, the oblique front side of the vehicle is not illuminated, and only the light P5 that illuminates the far front of the vehicle V can be obtained as shown in FIG. As a result, it is possible to reduce the annoyance caused by the light that illuminates the front side of the vehicle, and the driver of the host vehicle can be actively watched forward. Further, it is possible to prevent a pedestrian or the like that is on the diagonally front side of the vehicle from being dazzled.

一方、Ｌｏビームモードのときには副遮蔽板１６を下方に９０度だけ回転させた姿勢とされ、誘導リフレクタ６で反射し側方用リフレクタ７へ向かう光路を遮断しないように構成されている。このようにすると、Ｌｏビームモード時には、誘導リフレクタ６で反射した光は側方用リフレクタ７へ誘導され、側方用リフレクタ７で反射して開口部１４を通り、車両の斜め前側方に向かって進む。その結果、実施例１のＬｏビームモード時と同様に、誘導リフレクタ６で反射したバルブ２の光で、車両に近い前方の左側方または右側方を照らすことができる。   On the other hand, in the Lo beam mode, the sub-shielding plate 16 is rotated 90 degrees downward so that the optical path reflected by the guide reflector 6 and directed to the side reflector 7 is not blocked. In this way, in the Lo beam mode, the light reflected by the guide reflector 6 is guided to the side reflector 7, reflected by the side reflector 7, passes through the opening 14, and obliquely toward the front side of the vehicle. move on. As a result, as in the Lo beam mode of the first embodiment, the left side or the right side in front of the vehicle can be illuminated with the light of the bulb 2 reflected by the induction reflector 6.

なお、実施例２の車両用前照灯１においても、誘導リフレクタ６の反射面または側方用リフレクタ７の反射面に、暗所での視認性の高い緑色域の波長選択性を備えた波長選択性フィルタを設けることによって、車両の斜め前側方を照らす光を緑色系の色にし、夜間やトンネル内など暗所において車両の斜め前側方の視認性を向上させることができる。 In the vehicle headlamp 1 according to the second embodiment, the wavelength provided with the wavelength selectivity of the green region with high visibility in the dark place on the reflection surface of the guide reflector 6 or the reflection surface of the side reflector 7. By providing the selectivity filter, the light that illuminates the oblique front side of the vehicle has a green color, and the visibility of the oblique front side of the vehicle can be improved in a dark place such as at night or in a tunnel.

＜参考例３＞
次に、この発明に係る車両用前照灯に関連する技術の参考例３を図１０から図１５の図面を参照して説明する。
実施例２の車両用前照灯１では、遮蔽板１２と副遮蔽板１６の２つの遮蔽板を備えているが、参考例３の車両用前照灯１では、遮蔽板１２の機能と副遮蔽板１６の機能を併せ持つ１つの遮蔽板を備える点が、実施例２との相違点である。その他の構成は実施例２と同じであるので、同一構成については図中同一態様部分に同一符号を付して説明を省略し、実施例２との相違点のみ説明する。 < Reference Example 3 >
Next, Reference Example 3 of the technology related to the vehicle headlamp according to the present invention will be described with reference to the drawings of FIGS.
The vehicle headlamp 1 according to the second embodiment includes two shielding plates, that is, the shielding plate 12 and the sub-shielding plate 16. However, in the vehicle headlamp 1 according to the reference example 3 , the function and the auxiliary shielding plate 12 are provided. The difference from the second embodiment is that a single shielding plate having the function of the shielding plate 16 is provided. Since the other configuration is the same as that of the second embodiment, the same configuration is denoted by the same reference numeral in the drawing, the description thereof is omitted, and only differences from the second embodiment will be described.

参考例３の車両用前照灯１には、実施例２における遮蔽板１２がなく、その代わりに、遮蔽板支持フレーム８の下部に、サポート１７を介して、光を完全に遮断する材料からなる遮蔽板１８が取り付けられている。遮蔽板１８はサポート１７の先部に回動可能に設置されており、遮蔽板支持フレーム８の下部に設置されたアクチュエータ１９によって姿勢制御可能に構成されている。 The vehicle headlamp 1 of the reference example 3 does not have the shielding plate 12 in the second embodiment, but instead of a material that completely blocks light through the support 17 at the lower portion of the shielding plate support frame 8. A shielding plate 18 is attached. The shielding plate 18 is rotatably installed at the front portion of the support 17 and is configured to be capable of posture control by an actuator 19 installed at the lower portion of the shielding plate support frame 8.

そして、Ｌｏビームモードのときには、図１０に示すように、遮蔽板１８がサポート１７の先端で起立する姿勢とされ、このとき遮蔽板１８は、誘導リフレクタ６で反射し側方用リフレクタ７へ向かう光を遮断せず、メインリフレクタ５の下半部で反射して前上方へ向かって進む光のみ遮蔽するように構成されている。
このようにすると、Ｌｏビームモード時には、メインリフレクタ５の上半部で反射して前下方へ向かって進む光は、遮蔽板１８によって遮蔽されることなく、開口１０を通過して前方へ進むことができるが、メインリフレクタ５の下半部で反射して前上方へ向かって進む光は遮蔽板１８によって遮蔽され、開口１０を通過することができない。その結果、図１１に示すように、メインリフレクタ５で反射したバルブ２の光Ｐ６は、車両Ｖに近い前方の走行路面を照らし、遠方を照らさないので、対向車両の乗員を眩惑させるのを防止することができる。 In the Lo beam mode, as shown in FIG. 10, the shielding plate 18 stands up at the tip of the support 17. At this time, the shielding plate 18 is reflected by the guide reflector 6 and heads toward the side reflector 7. It is configured not to block light but to block only the light reflected by the lower half of the main reflector 5 and traveling forward and upward.
In this way, in the Lo beam mode, light that is reflected by the upper half of the main reflector 5 and travels forward and downward passes through the opening 10 and travels forward without being shielded by the shielding plate 18. However, the light reflected by the lower half of the main reflector 5 and traveling forward and upward is blocked by the shielding plate 18 and cannot pass through the opening 10. As a result, as shown in FIG. 11, the light P6 of the bulb 2 reflected by the main reflector 5 illuminates the front road surface near the vehicle V and does not illuminate the distance, thus preventing the oncoming vehicle occupant from being dazzled. can do.

また、誘導リフレクタ６で反射した光は、遮蔽板１８によって遮蔽されることなく、側方用リフレクタ７へ誘導され、側方用リフレクタ７で反射して開口部１４を通り、車両の斜め前側方に向かって進む。その結果、図１１に示すように、誘導リフレクタ６で反射したバルブ２の光Ｐ７で、車両Ｖに近い前方の左側方または右側方を照らすことができる。   Further, the light reflected by the guide reflector 6 is guided to the side reflector 7 without being shielded by the shielding plate 18, reflected by the side reflector 7, passes through the opening 14, and is obliquely forward laterally of the vehicle. Proceed toward. As a result, as shown in FIG. 11, the front left side or the right side close to the vehicle V can be illuminated with the light P <b> 7 of the bulb 2 reflected by the induction reflector 6.

一方、Ｈｉビームモードのときには、遮蔽板１８は、図１２に示す水平姿勢と、図１４に示す下向き鉛直姿勢のいずれかを選択することができるように構成されている。
Ｈｉビームモードのときに図１２に示す水平姿勢の遮蔽板１８を選択した場合には、遮蔽板１８は、誘導リフレクタ６で反射し側方用リフレクタ７へ向かう光路のみ遮断し、メインリフレクタ５の下半部および上半部で反射して前上方および前下方へ向かう光路は遮蔽しないように構成されている。
このようにすると、Ｈｉビームモード時に、メインリフレクタ５の上半部で反射して前下方へ向かって進む光も、メインリフレクタ５の下半部で反射して前上方へ向かって進む光も、遮蔽板１８によって遮蔽されることなく、開口１０を通過して前方へ進むことができる。その結果、図１３に示すように、メインリフレクタ５で反射したバルブ２の光Ｐ８は、車両Ｖの前方を遠方くまで照らすことができる。
また、誘導リフレクタ６で反射し側方用リフレクタ７へ向かう光が遮蔽板１８により遮断されるので、車両の斜め前側方は照明されなくなる。その結果、車両の斜め前側方を照らす光による煩わしさを軽減することができ、自車両の運転者に前方を注視させる効果がある。また、車両の斜め前側方にいる歩行者などを眩惑させるのを防止することができる。 On the other hand, in the Hi beam mode, the shielding plate 18 is configured to be able to select either the horizontal posture shown in FIG. 12 or the downward vertical posture shown in FIG.
When the horizontal shielding plate 18 shown in FIG. 12 is selected in the Hi beam mode, the shielding plate 18 blocks only the optical path reflected by the guide reflector 6 and directed to the side reflector 7. The optical path which is reflected by the lower half and the upper half and goes toward the front upper side and the front lower side is configured not to be shielded.
In this way, in the Hi beam mode, the light reflected by the upper half of the main reflector 5 and traveling forward and downward, and the light reflected by the lower half of the main reflector 5 and traveling forward and upward, Without being shielded by the shielding plate 18, it can pass forward through the opening 10. As a result, as shown in FIG. 13, the light P8 of the bulb 2 reflected by the main reflector 5 can illuminate the front of the vehicle V far.
In addition, since the light reflected by the guide reflector 6 and traveling toward the side reflector 7 is blocked by the shielding plate 18, the oblique front side of the vehicle is not illuminated. As a result, it is possible to reduce the annoyance caused by the light that illuminates the front side of the vehicle, and the driver of the host vehicle has an effect of gazing forward. Further, it is possible to prevent a pedestrian or the like that is on the diagonally front side of the vehicle from being dazzled.

一方、Ｈｉビームモードのときに図１４に示す下向き鉛直姿勢の遮蔽板１８を選択した場合には、遮蔽板１８は、誘導リフレクタ６で反射し側方用リフレクタ７へ向かう光路と、メインリフレクタ５の下半部および上半部で反射して前上方および前下方へ向かう光路のいずれの光路も遮蔽しないように構成されている。
このようにすると、Ｈｉビームモード時に、メインリフレクタ５の上半部で反射して前下方へ向かって進む光も、メインリフレクタ５の下半部で反射して前上方へ向かって進む光も、遮蔽板１８によって遮蔽されることなく、開口１０を通過して前方へ進むことができる。その結果、図１５に示すように、メインリフレクタ５で反射したバルブ２の光Ｐ９は、車両Ｖの前方を遠方くまで照らすことができる。
また、誘導リフレクタ６で反射した光は、遮蔽板１８によって遮蔽されることなく、側方用リフレクタ７へ誘導され、側方用リフレクタ７で反射して開口部１４を通り、車両の斜め前側方に向かって進む。その結果、図１５に示すように、誘導リフレクタ６で反射したバルブ２の光Ｐ１０で、車両Ｖに近い前方の左側方または右側方を照らすことができる。 On the other hand, when the shielding plate 18 in the downward vertical posture shown in FIG. 14 is selected in the Hi beam mode, the shielding plate 18 reflects the light reflected by the guide reflector 6 and travels toward the side reflector 7, and the main reflector 5. The optical path is configured so as not to block any of the optical paths that are reflected by the lower half and the upper half of the light and go forward and upward and downward.
In this way, in the Hi beam mode, the light reflected by the upper half of the main reflector 5 and traveling forward and downward, and the light reflected by the lower half of the main reflector 5 and traveling forward and upward, Without being shielded by the shielding plate 18, it can pass forward through the opening 10. As a result, as shown in FIG. 15, the light P9 of the bulb 2 reflected by the main reflector 5 can illuminate the front of the vehicle V far.
Further, the light reflected by the guide reflector 6 is guided to the side reflector 7 without being shielded by the shielding plate 18, reflected by the side reflector 7, passes through the opening 14, and is obliquely forward laterally of the vehicle. Proceed toward. As a result, as shown in FIG. 15, the front left side or the right side near the vehicle V can be illuminated with the light P <b> 10 of the bulb 2 reflected by the induction reflector 6.

なお、参考例３の車両用前照灯１においても、誘導リフレクタ６の反射面または側方用リフレクタ７の反射面に、暗所での視認性の高い緑色域の波長選択性を備えた波長選択性フィルタを設けることによって、車両の斜め前側方を照らす光を緑色系の色にし、夜間やトンネル内など暗所において車両の斜め前側方の視認性を向上させることができる。
また、上述した各実施例１，２および参考例１〜３の車両用前照灯１において、遮蔽板１２、副遮蔽板１６、遮蔽板１８の姿勢制御を、ハンドル舵角信号やウィンカー信号に基づいて行うことも可能である。 In the vehicle headlamp 1 of Reference Example 3 as well, the wavelength provided with the wavelength selectivity of the green region with high visibility in the dark place on the reflective surface of the guide reflector 6 or the reflective surface of the side reflector 7. By providing the selectivity filter, the light that illuminates the oblique front side of the vehicle has a green color, and the visibility of the oblique front side of the vehicle can be improved in a dark place such as at night or in a tunnel.
Further, in the vehicle headlamps 1 according to the first and second embodiments and the first to third embodiments , the attitude control of the shielding plate 12, the auxiliary shielding plate 16, and the shielding plate 18 is performed on the steering wheel steering angle signal and the winker signal. It is also possible to do based on this.

この発明に係る車両用前照灯に関連する技術の参考例１における構成図であり、Ｌｏビーム時を示す図である。It is a block diagram in the reference example 1 of the technique relevant to the vehicle headlamp which concerns on this invention, and is a figure which shows the time of Lo beam. 参考例１の車両用前照灯のＬｏビーム時における照明範囲を示す平面図である。It is a top view which shows the illumination range at the time of Lo beam of the vehicle headlamp of the reference example 1. FIG. 参考例１の車両用前照灯における構成図であり、Ｈｉビーム時を示す図である。It is a block diagram in the vehicle headlamp of the reference example 1, and is a figure which shows the time of Hi beam. 参考例１の車両用前照灯のＨｉビーム時における照明範囲を示す平面図である。It is a top view which shows the illumination range at the time of the Hi beam of the vehicle headlamp of the reference example 1. この発明に係る車両用前照灯の実施例１における構成図であり、Ｌｏビーム時を示す図である。It is a block diagram in Example 1 of the vehicle headlamp which concerns on this invention, and is a figure which shows the time of Lo beam. この発明に係る車両用前照灯に関連する技術の参考例２における構成図であり、Ｌｏビーム時を示す図である。It is a block diagram in the reference example 2 of the technique relevant to the vehicle headlamp which concerns on this invention, and is a figure which shows the time of Lo beam. 参考例２の車両用前照灯のＬｏビーム時における照明範囲を示す平面図である。It is a top view which shows the illumination range at the time of Lo beam of the vehicle headlamp of the reference example 2. FIG. この発明に係る車両用前照灯の実施例２における構成図であり、Ｈｉビーム時を示す図である。It is a block diagram in Example 2 of the vehicle headlamp which concerns on this invention, and is a figure which shows the time of Hi beam. 実施例２の車両用前照灯のＨｉビーム時における照明範囲を示す平面図である。It is a top view which shows the illumination range at the time of the Hi beam of the vehicle headlamp of Example 2. FIG. この発明に係る車両用前照灯に関連する技術の参考例３における構成図であり、Ｌｏビーム時を示す図である。It is a block diagram in the reference example 3 of the technique relevant to the vehicle headlamp which concerns on this invention, and is a figure which shows the time of Lo beam. 参考例３の車両用前照灯のＬｏビーム時における照明範囲を示す平面図である。It is a top view which shows the illumination range at the time of Lo beam of the vehicle headlamp of the reference example 3. FIG. 参考例３の車両用前照灯における構成図であり、Ｈｉビーム時の第１形態を示す図である。It is a block diagram in the vehicle headlamp of the reference example 3 , and is a figure which shows the 1st form at the time of Hi beam. 参考例３の車両用前照灯のＨｉビーム時の第１形態における照明範囲を示す平面図である。It is a top view which shows the illumination range in the 1st form at the time of the Hi beam of the vehicle headlamp of the reference example 3 . 参考例３の車両用前照灯における構成図であり、Ｈｉビーム時の第２形態を示す図である。It is a block diagram in the vehicle headlamp of the reference example 3 , and is a figure which shows the 2nd form at the time of Hi beam. 参考例３の車両用前照灯のＨｉビーム時の第２形態における照明範囲を示す平面図である。It is a top view which shows the illumination range in the 2nd form at the time of the Hi beam of the vehicle headlamp of the reference example 3 . 光の波長と比視感度の関係を示す比視感度特性図である。It is a specific luminous sensitivity characteristic figure which shows the relationship between the wavelength of light, and specific luminous efficiency.

符号の説明Explanation of symbols

１ 車両用前照灯
２ バルブ（光源）
６ 誘導リフレクタ
７ 側方用リフレクタ
１２ 遮蔽板
１２ａ 鏡面（遮蔽面）
１６ 副遮蔽板
１８ 遮蔽板 1 Vehicle headlamp 2 Bulb (light source)
6 Inductive reflector 7 Side reflector 12 Shield plate 12a Mirror surface (shield surface)
16 Sub-shield 18 Shield

Claims (2)

光源と、前記光源からの光を車両前方へ誘導するメインリフレクタと、前記光源から前記メインリフレクタで反射して車両前上方へ向かう光路を部分的に遮蔽する遮蔽状態および遮蔽しない非遮蔽状態に選択的に切り換え可能な遮蔽板と、を備えた車両用前照灯であって、
光を車両前側方へ誘導する側方用リフレクタと、
前記メインリフレクタの上部前端に連なって形成され、前記光源からの光の一部を前記側方用リフレクタへ誘導する誘導リフレクタと、
を備え、
前記遮蔽板の遮蔽面が鏡面で形成されていて、該遮蔽板は、前記遮蔽状態としたときに、前記メインリフレクタの下半部で反射した前記光源からの光を遮蔽するとともに前記遮蔽面で反射させて前記側方用リフレクタへ誘導し、
前記側方用リフレクタのみに、暗所での視認性が高い緑色域の波長選択性を備える波長選択性フィルタを配置したことを特徴とする車両用前照灯。 A light source, a main reflector that guides light from the light source to the front of the vehicle, and a shielded state that partially shields the light path that is reflected from the light source by the main reflector and goes upward in front of the vehicle, and a non-shielded state that is not shielded A vehicular headlamp comprising a switchable shielding plate,
A side reflector for guiding light to the front side of the vehicle;
A guidance reflector formed to be connected to an upper front end of the main reflector, and guiding a part of light from the light source to the side reflector;
With
The shielding surface of the shielding plate is formed as a mirror surface, and when the shielding plate is in the shielding state, the shielding plate shields the light from the light source reflected by the lower half of the main reflector and the shielding surface. Reflect and guide to the side reflector,
A vehicle headlamp, wherein a wavelength selective filter having a wavelength selectivity in a green region with high visibility in a dark place is disposed only on the side reflector. 前記遮蔽板を非遮蔽状態に切り換えた場合に、前記誘導リフレクタから前記側方用リフレクタへの光路を遮蔽する副遮蔽板を備えることを特徴とする請求項１に記載の車両用前照灯。 The vehicular headlamp according to claim 1, further comprising: a sub-shielding plate that shields an optical path from the guide reflector to the side reflector when the shielding plate is switched to a non-shielding state.
JP2008109011A 2008-04-18 2008-04-18 Vehicle headlamp Expired - Fee Related JP5358118B2 (en)

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