JP4735852B2 - Vehicle headlamp - Google Patents

Vehicle headlamp Download PDF

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JP4735852B2
JP4735852B2 JP2007099933A JP2007099933A JP4735852B2 JP 4735852 B2 JP4735852 B2 JP 4735852B2 JP 2007099933 A JP2007099933 A JP 2007099933A JP 2007099933 A JP2007099933 A JP 2007099933A JP 4735852 B2 JP4735852 B2 JP 4735852B2
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light
lamp
light guide
lens cover
inner panel
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JP2008258037A (en
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智之 影山
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Ichikoh Industries Ltd
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Ichikoh Industries 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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

本発明は車両用前照灯に関するものであり、特に、複数の機能のランプが組み合わされたコンビネーション型の車両用前照灯に関する。   The present invention relates to a vehicle headlamp, and more particularly to a combination type vehicle headlamp in which lamps having a plurality of functions are combined.

車両用前照灯には、ランプボディとその前端開口部に取り付けた透明なカバーとで画成されている灯室内に、ヘッドランプとフロントターンシグナルランプ、及びフロントクリアランスランプ等、複数の機能のランプを一体的に組み込んでなるコンビネーション型の前照灯がある(例えば、特許文献１参照)。   The vehicle headlamp has a plurality of functions such as a headlamp, a front turn signal lamp, and a front clearance lamp in a lamp chamber defined by a lamp body and a transparent cover attached to the front end opening. There is a combination type headlamp in which a lamp is integrated (see, for example, Patent Document 1).

このコンビネーション型の前照灯では、ランプボディ内に配設している複数の機能のランプのそれぞれに、光源及びリフレクタ等が必要とされるため、全体の規模が大きくなり前照灯全体が大型化するという問題がある。   In this combination-type headlamp, a light source, a reflector, and the like are required for each of the multiple function lamps arranged in the lamp body. There is a problem of becoming.

また、複数の機能のランプを上下に積層した前照灯では、自動車の車体フロント部の流線型デザインとのマッチングから、ランプボディ内の下部領域が上部領域よりも前方に突出し、前端開口部及び該前端開口部に取り付けたレンズカバーが光軸に対しスラント(傾斜)したデザイン形状にせざるを得ない。   In addition, in a headlamp in which a lamp having a plurality of functions is stacked vertically, the lower region in the lamp body projects forward from the upper region due to the matching with the streamlined design of the front part of the automobile body, and the front end opening and the The lens cover attached to the front end opening must be slanted (tilted) with respect to the optical axis.

さらに、特許文献１に示す車両用前照灯では、小型化を図るために、フロントクリアランスランプの光源にＬＥＤ(発光ダイオード)等の発光素子を用い、ＬＥＤから出射した光を透明材料からなる透光カバーの背後より該透光カバー内に導光させて、該透光カバーの前方に向けて透過させる照明を行っている。この構造では、フロントクリアランスランプ用の透光カバーを、ランプボディ内の下部領域に配設している。
特開２００６−２３６５８８号公報 Further, in the vehicle headlamp disclosed in Patent Document 1, in order to reduce the size, a light emitting element such as an LED (light emitting diode) is used as a light source of a front clearance lamp, and light emitted from the LED is made of a transparent material. Illumination is performed such that light is guided from behind the light cover into the light-transmitting cover and transmitted toward the front of the light-transmitting cover. In this structure, a translucent cover for the front clearance lamp is disposed in a lower region in the lamp body.
JP 2006-236588 A

しかしながら、特許文献１に開示されるような、複数の機能のランプを上下に積層した前照灯では、ランプボディ内の下部領域が上部領域よりも前方に突出し、前端開口部、及びこの前端開口部に取り付けたレンズカバーが、光軸に対しスラントしたデザイン形状にせざるを得ないため、ランプ面積に対する前面投影面積が減少の傾向にある。   However, in a headlamp in which lamps having a plurality of functions are stacked one above the other as disclosed in Patent Document 1, the lower region in the lamp body projects forward from the upper region, and the front end opening and the front end opening Since the lens cover attached to the part has to be slanted with respect to the optical axis, the front projection area with respect to the lamp area tends to decrease.

このため、灯室内の各機能は法規で定められた配光を満足する必要最小限の前面投影面積での設定が強いられ、当然、ランプボディ内の下部領域に配設しているフロントクリアランスランプ用の透光カバーの大きさも小さくせざるを得ない。したがって、必要最小限の大きさで、法規で定められた配光を満足するフロントクリアランスランプ等における信号灯の組み込みが望まれている。   For this reason, each function in the lamp chamber is forced to be set with the minimum required front projection area that satisfies the light distribution stipulated by laws and regulations, and of course, the front clearance lamp is arranged in the lower area in the lamp body. The size of the translucent cover for use must be reduced. Therefore, it is desired to incorporate a signal lamp in a front clearance lamp or the like that satisfies the light distribution defined by laws and regulations with a minimum size.

また、大きくスラントした形状になると、その下部領域部分がレンズカバーを通して外部に露見し、外観状の見栄えを低下させるという問題もあった。   Further, when the slanted shape is large, the lower region portion is exposed to the outside through the lens cover, and there is a problem that the appearance of the appearance is deteriorated.

本発明は、上記の事情に鑑みてなされたものであり、その目的とするところは、限られた前面投影面積内において信号用ランプの機能の向上と、下部領域部分等の被視認性を向上させることができる車両用前照灯を提供することにある。   The present invention has been made in view of the above circumstances, and its purpose is to improve the function of the signal lamp and improve the visibility of the lower region within a limited front projection area. An object of the present invention is to provide a vehicular headlamp that can be used.

本発明に係る車両用前照灯は、ランプボディと該ランプボディの前端開口部に光軸に対しスラントして取り付けた透明なレンズカバーとにより画成されている灯室内に、複数の機能のランプを一体的に組み込んでなるコンビネーション型の車両用前照灯であって、信号用の光を発する光源と、前記光源からの光が入射されたて該光を内面反射により他端側に向かって導光し、かつ、該導光途中の光の一部を前方に向けて出射させる導光体とを有してなる導光板を備える。この構成によれば、光源からの光を導光体で均一に輝かせ信号灯の機能を満足させることができる。   The vehicle headlamp according to the present invention has a plurality of functions in a lamp chamber defined by a lamp body and a transparent lens cover that is attached to the front end opening of the lamp body by slanting with respect to the optical axis. A vehicle headlamp of a combination type in which a lamp is integrated, and a light source that emits signal light, and the light from the light source is incident on the other end side by internal reflection. A light guide plate that includes a light guide body that guides light and emits part of the light in the middle of the light guide forward. According to this configuration, the light from the light source can be uniformly illuminated by the light guide to satisfy the function of the signal lamp.

前記導光体を前記レンズカバーの内面に沿わせて配置してなることを特徴とする。この構成によれば、導光体をレンズカバーの内面に沿わせて配置しているので、導光体から前方に向かって出射される光は、直ぐに、レンズカバーを透過して外部へ出る。これにより、光損失がなく、外部から明るく輝いた導光体を見ることができる。   The light guide is arranged along the inner surface of the lens cover. According to this configuration, since the light guide is disposed along the inner surface of the lens cover, light emitted forward from the light guide passes through the lens cover and exits to the outside. Thereby, there is no light loss, and it is possible to see a bright and bright light guide from the outside.

上記構成において、前記複数の機能のランプの間を仕切るインナーパネルを有し、前記導光体から出射された光の一部を前記インナーパネルの表面反射を介して間接配光するようにしたことを特徴とする。   In the above configuration, an inner panel that partitions the lamps having the plurality of functions is provided, and a part of the light emitted from the light guide is indirectly distributed through the surface reflection of the inner panel. It is characterized by.

この構成によれば、上記導光体から出射された光の一部は、前記インナーパネルの表面反射を介して間接配光の形で、導光体から直接出射された光の一部と共に前方へ配光されるので光の損失が少ない。これにより、小さな前面投影面積であっても、明るい信号光が得られる。また、インナーパネルの表面で光の一部を反射させて間接配光することにより、外部からはインナーパネル自体が輝いているように視認され、外観上の見栄えも向上し、下部領域部分等の被視認性も高まる。また、前記インナーパネルは、球形状のインナーパネルであり、導光体は棒状の曲形状をなすことを特徴とする。この構成によれば、導光体は、球形状のインナーパネルの形状に対応することができ、導光体により導いた光を均一に発光させ視認性を良くできる。   According to this configuration, a part of the light emitted from the light guide is in the form of an indirect light distribution through the surface reflection of the inner panel, and a part of the light directly emitted from the light guide. There is little light loss because Thereby, even if it is a small front projection area, bright signal light is obtained. In addition, by reflecting a part of the light on the surface of the inner panel and indirectly distributing the light, the inner panel is visually recognized from the outside as if it is shining, the appearance is improved, and the lower region portion, etc. Visibility is also increased. Further, the inner panel is a spherical inner panel, and the light guide has a rod-like curved shape. According to this configuration, the light guide can correspond to the shape of the spherical inner panel, and the light guided by the light guide can be uniformly emitted to improve visibility.

上記構成において、上記導光体は、上記光源からの距離が光学的に遠くなるに従って徐々に断面積を小さく形成してなる、構成を採用できる。   The said structure WHEREIN: The structure which forms the cross-sectional area gradually small as the distance from the said light source becomes optically far can be employ | adopted for the said light guide.

この構成によれば、光源からの距離が遠くなるに従って導光量は徐々に減って行くが、これに伴って断面積も減少するので光密度は変わらない。これにより、導光体は光源側から先端側まで均一の明るさで輝くことになる。   According to this configuration, the amount of guided light gradually decreases as the distance from the light source increases, but the light density does not change because the cross-sectional area also decreases accordingly. Thereby, the light guide shines with uniform brightness from the light source side to the tip side.

本発明によれば、導光体から前方に向かって出射される光の損失が少ないので、限られた前面投影面積内において、外部から明るく輝いた導光体を見ることができ、信号用ランプの機能の向上が図れる。また、インナーパネルの表面で光の一部を反射させることにより、外部からはインナーパネル自体が輝いているように視認され、外観上の見栄えが向上するとともに、下部領域部分等の被視認性も高まる。さらに、導光体を光源側から先端側まで、均一の明るさで輝かせることもできるので、さらに見栄えの向上が期待できる。   According to the present invention, since the loss of light emitted forward from the light guide is small, the bright light guide can be seen from the outside within the limited front projection area, and the signal lamp Can be improved. In addition, by reflecting a part of the light on the surface of the inner panel, it is visually recognized from the outside as if the inner panel itself is shining, and the appearance is improved and the visibility of the lower region portion and the like is also improved. Rise. Furthermore, since the light guide can be illuminated with uniform brightness from the light source side to the tip side, further improvement in appearance can be expected.

以下、本発明の最良の実施形態について、添付図面を参照しつつ説明する。図１は本発明を適用した自動車のコンビネーション型前照灯の正面図で、図２は図１のＡ−Ａ線断面図である。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a combination headlamp for an automobile to which the present invention is applied, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

図１に示すコンビネーション型前照灯１は、自動車の進行方向で、かつ、ドライバー側から見た右側に搭載されるものである。なお、左側に搭載されるコンビネーション型前照灯は、図示のコンビネーション型前照灯に対して左右逆となる。   The combination type headlamp 1 shown in FIG. 1 is mounted on the right side as viewed from the driver side in the traveling direction of the automobile. In addition, the combination type headlamp mounted on the left side is reversed to the left and right with respect to the illustrated combination type headlamp.

前記コンビネーション型前照灯１は、自動車の前部の中央部側に配置された前照灯の機能を有する走行ビームランプ(ハイビームランプ)２と、サイド側に配置されたすれ違いビームランプ(ロービームランプ)３と、走行ビームランプ２及びすれ違いビームランプ３の各サイド側にそれぞれ位置した状態で配置され、夜間の走行中に前から見て車の存在が分かるようにする信号灯、すなわちクリアランスランプの機能を有する複数個(本例では３個)の導光板４，４，４とから組み合わされている。   The combination type headlamp 1 includes a traveling beam lamp (high beam lamp) 2 having the function of a headlamp disposed on the center side of the front portion of the automobile, and a low beam lamp (low beam lamp) disposed on the side side. ) 3 and a function of a signal lamp, that is, a clearance lamp, which is arranged on each side of the traveling beam lamp 2 and the passing beam lamp 3 so that the vehicle can be seen from the front during night driving. Are combined from a plurality (three in this example) of light guide plates 4, 4, 4.

前記コンビネーション型前照灯１は、図２に示すように、ランプボディ５と該ランプボディ５の前面開口部に光軸に対しスラントして取り付けられた透明なレンズカバー６(図１では取り外している)とで灯室７が画成されており、この灯室７内に図１に示すように上記走行ビームランプ２とすれ違いビームランプ３と導光板４，４とを配置している。また、灯室７内には、インナーパネル８(もしくは、インナーハウジングやエクステンション)と、すれ違いビームランプ３用の光源９及びリフレクタ１０及びインナーレンズ１１と、光源部１２及びリフレクタ１３と導光板４，４，４が、それぞれ配置されている。   As shown in FIG. 2, the combination type headlamp 1 includes a lamp body 5 and a transparent lens cover 6 attached to the front opening of the lamp body 5 by slanting with respect to the optical axis (not shown in FIG. 1). A lamp chamber 7 is defined, and the traveling beam lamp 2, the passing beam lamp 3, and the light guide plates 4 and 4 are arranged in the lamp chamber 7 as shown in FIG. In the lamp chamber 7, an inner panel 8 (or an inner housing or an extension), a light source 9, a reflector 10, and an inner lens 11 for the passing beam lamp 3, a light source unit 12, a reflector 13, and a light guide plate 4 are provided. 4 and 4 are respectively arranged.

前記インナーパネル８は、灯室７内を走行ビームランプ２とすれ違いビームランプ３との間を機能別に仕切る仕切壁である。このインナーパネル８には、走行ビームランプ２用のリフレクタ１３からの光とすれ違いビームランプ３用のリフレクタ１０及びインナーレンズ１１からの光を前記レンズカバー６を介して透過させて外部に照射させ、正面視がほぼ円形の円筒形状をなす走行ビームランプ２用の開口部１４とすれ違いビームランプ３用の開口部１５とを設けている。そして、走行ビームランプ２とすれ違いビームランプ３との間の空間を覆い隠すようにして、ランプボディ５に適宜の固定手段により固定され、レンズカバー６から内部構造物、例えば灯室７内のリフレクタ１０，１３の後部に配置されている光軸調整機構、配線機構等が見えないように隠蔽している。   The inner panel 8 is a partition wall that partitions the interior of the lamp chamber 7 between the traveling beam lamp 2 and the passing beam lamp 3 according to function. The inner panel 8 is caused to transmit light from the reflector 13 for the traveling beam lamp 2 and light from the reflector 10 for the passing beam lamp 3 and the inner lens 11 through the lens cover 6 and irradiate outside. An opening 14 for the traveling beam lamp 2 and an opening 15 for the passing beam lamp 3, which have a substantially circular cylindrical shape when viewed from the front, are provided. The space between the traveling beam lamp 2 and the passing beam lamp 3 is covered with an appropriate fixing means so as to cover the space between the traveling beam lamp 2 and the passing beam lamp 3, and the internal structure such as a reflector in the lamp chamber 7 is fixed from the lens cover 6. The optical axis adjusting mechanism, the wiring mechanism, and the like arranged at the rear portions of 10 and 13 are concealed so as not to be seen.

また、前記インナーパネル８の少なくとも表側(レンズカバー６と対向する側、またはレンズカバー６を通して見える側)とランプボディ５の内面との間の隙間には、このインナーパネル８及びランプボディ５とレンズカバー６とで画成された補助灯室１６が設けられている。この補助灯室１６内における少なくともインナーパネル８の表面には、アルミ蒸着や銀色塗装等の鏡面が施されている。   Further, in the gap between at least the front side of the inner panel 8 (the side facing the lens cover 6 or the side visible through the lens cover 6) and the inner surface of the lamp body 5, the inner panel 8 and the lamp body 5 and the lens An auxiliary lamp chamber 16 defined by the cover 6 is provided. At least the surface of the inner panel 8 in the auxiliary lamp chamber 16 is provided with a mirror surface such as aluminum vapor deposition or silver paint.

前記導光板４は、上記補助灯室１６内にクリアランスランプを形成するもので、光源１７と、導光体２１とで構成されている。   The light guide plate 4 forms a clearance lamp in the auxiliary lamp chamber 16 and includes a light source 17 and a light guide 21.

前記導光板４の構成について、図３を用いてさらに説明する。図３は導光板４の入光部を示すものである。光源１７は、例えばＬＥＤ(発光ダイオード)であり、ランプボディ５に取り付けられた基板１８に実装され、灯室７内の下部にインナーパネル８で隠蔽した状態にして配置されている。光源１７の点灯制御は車両の運転席からの操作によって実行される。   The configuration of the light guide plate 4 will be further described with reference to FIG. FIG. 3 shows a light incident portion of the light guide plate 4. The light source 17 is, for example, an LED (light emitting diode), is mounted on a substrate 18 attached to the lamp body 5, and is disposed in a state of being hidden by the inner panel 8 at a lower portion in the lamp chamber 7. The lighting control of the light source 17 is executed by an operation from the driver's seat of the vehicle.

前記導光体２１は、ガラス製または合成樹脂（例えば、ポリカーボネート樹脂、メタクリル樹脂、ポリメチルメタクリエート樹脂等)からなる透光性素材で形成された断面概略四角形状をした細長く、また適宜に屈曲された棒状の導光レンズである。その導光体２１の表側(レンズカバー６と対向する側、またはレンズカバー６を通して見える側)は光を出射する発光面２１ａで、その裏面が乱反射面２１ｂであり、左右の両側面２１ｃ，２１ｃも間接配光用の光を作り出すために光りの漏れを許可する面になっている。また、乱反射面２１ｂには、乱反射がよく行われるようにするために、例えば図４に導光体２１の裏面(乱反射面２１ｂ)を一部拡大して示しているように、多数の錐形をした凹部２３を設けたプリズム加工あるいはシボ加工をほぼ全面に亘って設けている。なお、凹部２３のプリズム形状は、四角錐形だけでなく、多角形錐あるいは円錐等であってもよい。   The light guide 21 is an elongated shape having a substantially square cross section formed of a translucent material made of glass or synthetic resin (for example, polycarbonate resin, methacrylic resin, polymethyl methacrylate resin, etc.), and bends appropriately. It is the made rod-shaped light guide lens. The front side of the light guide 21 (the side facing the lens cover 6 or the side visible through the lens cover 6) is a light emitting surface 21a that emits light, the back surface is a diffusely reflecting surface 21b, and both left and right side surfaces 21c and 21c. The surface is also allowed to leak light to create light for indirect light distribution. Further, in order to perform irregular reflection well on the irregular reflection surface 21b, for example, as shown in FIG. 4, the back surface of the light guide 21 (diffuse reflection surface 21b) is partially enlarged, and a large number of cones are formed. Prism processing or embossing provided with a concave portion 23 is provided over almost the entire surface. The prism shape of the recess 23 may be not only a quadrangular pyramid but also a polygonal pyramid or a cone.

そして、導光体２１は、導光体２１の一端部、すなわち発光面２１ａと面交差する一端面を、光源１７の先端発光部１７ａが対向配設される入光面２２とし、この入光面２２に光源１７の先端発光部１７ａが収容配置される光源収容室２４を設けている。また、導光体２１は、入光面２２から他端側に向かって離れて行く、すなわち入光面２２から光学的に遠くになるに従い、徐々に断面積が小さくなるようにして、先細状に形成されている。   The light guide 21 has one end portion of the light guide 21, that is, one end surface intersecting the light emitting surface 21 a as a light incident surface 22 on which the tip light emitting portion 17 a of the light source 17 is disposed to face the light incident surface 21. A light source accommodation chamber 24 in which the front end light emitting portion 17 a of the light source 17 is accommodated is provided on the surface 22. Further, the light guide 21 is tapered from the light incident surface 22 toward the other end side, that is, the cross-sectional area gradually decreases as the distance from the light incident surface 22 increases optically. Is formed.

このように構成された導光体２１は、光源１７が配置されている灯室７内の下部において、光源収容室２４に光源１７の先端発光部１７ａの一部を収容させるようにして、一端側の入光面２２の部分を光源１７に連結させ、その灯室７内の下部からインナーパネル８の前面に露見し、かつレンズカバー６の内面をはわせて灯室７のほぼ上端部まで向かい、さらに補助灯室１６内の奥部(後端部)へ向かって延びるように湾曲させて設けられ、ランプボディ５に適宜の固定手段により固定されている。   The light guide 21 configured as described above is configured such that a part of the tip light emitting portion 17a of the light source 17 is accommodated in the light source accommodating chamber 24 in the lower part in the lamp chamber 7 where the light source 17 is disposed. The light entrance surface 22 on the side is connected to the light source 17, exposed from the lower part of the lamp chamber 7 to the front surface of the inner panel 8, and the inner surface of the lens cover 6 is put to almost the upper end of the lamp chamber 7. It is provided to be curved so as to extend further toward the inner portion (rear end portion) in the auxiliary lamp chamber 16, and is fixed to the lamp body 5 by appropriate fixing means.

そして、光源１７が点灯されると、光源１７から出射された光が入光面２２から導光体２１内に放射状に広がって入射され、これが内部で乱反射を繰り返して他端側に向かって導光されて行き、途中、一部の光が正面の発光面１７からレンズカバー６を透過して外部に出射する(図２中に符号２５で示す直接配光)。これと同時に、左右の両側面２１ｃ，２１ｃからも一部の光が漏れ出て、これがインナーパネル８の鏡面をなす外表面で反射し、間接配光(図２中に符号２６で示す)としてレンズカバー６を透過して外部に出射する。これにより、導光体２１による直接配光２５及びインナーパネル８で反射させる補助灯室１６内の間接配光２６をもってクリアランスランプ等の信号灯として使用される。   When the light source 17 is turned on, the light emitted from the light source 17 spreads radially and enters the light guide 21 from the light incident surface 22, and this is repeatedly diffused and guided toward the other end. On the way, a part of the light passes through the lens cover 6 from the front light emitting surface 17 and exits to the outside (direct light distribution indicated by reference numeral 25 in FIG. 2). At the same time, part of the light leaks from both the left and right side surfaces 21c and 21c, and is reflected by the outer surface forming the mirror surface of the inner panel 8 to provide indirect light distribution (indicated by reference numeral 26 in FIG. 2). The light passes through the lens cover 6 and is emitted to the outside. Thereby, the direct light distribution 25 by the light guide 21 and the indirect light distribution 26 in the auxiliary lamp chamber 16 reflected by the inner panel 8 are used as a signal lamp such as a clearance lamp.

したがって、本実施の形態に係る車両用前照灯１によれば、導光体２１をレンズカバー６の内面に沿わせて配置しているので、導光体２１から前方に向かって出射される光は、直ぐにレンズカバーを透過して外部に出ることになる。これにより、光損失がなく、外部から明るく輝いた導光体２１を見ることができ、信号用ランプの機能の向上が図れる。   Therefore, according to the vehicle headlamp 1 according to the present embodiment, since the light guide 21 is arranged along the inner surface of the lens cover 6, the light is emitted forward from the light guide 21. The light immediately passes through the lens cover and goes out. Thereby, there is no light loss, and the light guide 21 shining brightly from the outside can be seen, and the function of the signal lamp can be improved.

また、導光体２１の左右の両側面２１ｃ，２１ｃから漏れ出た光は、インナーパネル８の鏡面をなす表面で反射し、間接配光２６としてレンズカバー６を透過して外部に配光されるので光の損失が少ない。これにより、小さな前面投影面積であっても、明るい信号用の光が得られる。また、インナーパネル８の鏡面で光の一部を反射させて間接配光することにより、外部からはインナーパネル８自体が輝いて視認され、外観上の見栄えも向上し、下部領域部分の被視認性も高まることになる。   Further, the light leaking from the left and right side surfaces 21c, 21c of the light guide 21 is reflected by the mirror surface of the inner panel 8, and is transmitted to the outside through the lens cover 6 as an indirect light distribution 26. Therefore, there is little loss of light. Thereby, even for a small front projection area, bright signal light can be obtained. In addition, by reflecting a part of the light on the mirror surface of the inner panel 8 and indirectly distributing the light, the inner panel 8 itself is shined and visually recognized from the outside, the appearance is improved, and the lower region portion is visually recognized. The nature will also increase.

さらに、導光体２１の断面積を光源１７からの距離が遠くなるに従い、徐々に小さくなるように先細状に形成しているので、光源１７からの距離が遠くなり、導光量が徐々に減っても光密度は変わらない。これにより、導光体２１は、光源側から先端側まで均一の明るさで輝かせることができる。   Furthermore, since the cross-sectional area of the light guide 21 is tapered so that it gradually decreases as the distance from the light source 17 increases, the distance from the light source 17 increases and the amount of light guided decreases gradually. However, the light density does not change. Thereby, the light guide 21 can be made to shine with uniform brightness from the light source side to the front end side.

以上、本発明の好ましい実施の形態について説明したが、本発明は、特許請求の範囲の概念を逸脱しない範囲で、上記実施の形態の構造に種々の変形や変更を施すことも可能である。   The preferred embodiments of the present invention have been described above. However, the present invention can be variously modified and changed without departing from the concept of the claims.

例えば、上記実施の形態では、導光板４をクリアランスランプとして使用した場合について説明したが、これ以外にターンシグナルランプ等の信号灯として使用することも可能である。   For example, although the case where the light guide plate 4 is used as a clearance lamp has been described in the above embodiment, it can also be used as a signal lamp such as a turn signal lamp.

また、信号灯として必要な色を出す場合には、光源１７側の色を変えても、あるいは導光体２１の色を変えてもよい。さらに、導光板４の数は適宜に変更しても差し支えないものである。   In addition, when a necessary color is emitted as a signal lamp, the color on the light source 17 side may be changed, or the color of the light guide 21 may be changed. Furthermore, the number of the light guide plates 4 may be changed as appropriate.

本発明を適用した車両用前照灯の使用面図である。It is a use surface view of the vehicular headlamp to which the present invention is applied. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 図１及び図２に示す導光板における入光部の拡大断面図である。It is an expanded sectional view of the light-incidence part in the light-guide plate shown in FIG.1 and FIG.2. 同上導光板の乱反射面の拡大斜視図である。It is an expansion perspective view of the irregular reflection surface of a light-guide plate same as the above.

符号の説明Explanation of symbols

１ 車両用前照灯
２ 走行ビームランプ
３ すれ違いビームランプ
４ 導光板(クリアランスランプ)
５ ランプボディ
６ レンズカバー
７ 灯室
８ インナーパネル
１７ 光源
２１ 導光体
２１ａ 発光面
２１ｂ 乱反射面
２２ 入光面
２３ 凹部
２５ 直接配光
２６ 間接配光 1 Vehicle headlamp 2 Traveling beam lamp 3 Passing beam lamp 4 Light guide plate (clearance lamp)
5 Lamp body 6 Lens cover 7 Lamp chamber 8 Inner panel 17 Light source 21 Light guide 21a Light emitting surface 21b Diffuse reflecting surface 22 Light incident surface 23 Recess 25 Direct light distribution 26 Indirect light distribution

Claims (2)

ランプボディと該ランプボディの前端開口部に光軸に対しスラントして取り付けた透明なレンズカバーとにより画成されている灯室内に、複数の機能のランプを一体的に組み込んでなるコンビネーション型の車両用前照灯であって、
前記複数の機能のランプの間を仕切るインナーパネルであって、前記機能のランプを開口部から露出させて前記レンズカバーとランプボディの間に配置したインナーパネルと、
信号用の光を発する光源と、前記光源からの光を一端から入射して内面反射の繰り返しにより他端側に向かって導光し、かつ、該導光途中の光の一部を正面の発光面から出射させる導光体とを有してなる導光板を備え、
前記導光体は、前記レンズカバーとインナーパネルの間にレンズカバー内面に沿って配置され、その正面の発光面から出射される光を前記レンズカバーを透過して外部に出射する一方、その側面から漏れる光を前記インナーパネルで反射させ前記レンズカバーを透過して外部に出射することを特徴とする車両用前照灯。 A combination type in which a lamp having a plurality of functions is integrally incorporated in a lamp chamber defined by a lamp body and a transparent lens cover attached to the front end opening of the lamp body by slanting with respect to the optical axis. A vehicle headlamp,
An inner panel for partitioning the plurality of function lamps, the inner panel being disposed between the lens cover and the lamp body by exposing the function lamp from an opening;
A light source that emits signal light; light from the light source is incident from one end and guided to the other end side by repeating internal reflection ; and part of the light that is being guided is emitted from the front A light guide plate having a light guide that emits from the surface ,
The light guide is disposed along the inner surface of the lens cover between the lens cover and the inner panel, and transmits light emitted from the light emitting surface on the front surface to the outside through the lens cover. The vehicle headlamp is characterized in that light leaking from the light is reflected by the inner panel, passes through the lens cover, and is emitted to the outside . 上記導光体は、上記光源からの距離が光学的に遠くなるに従って徐々に断面積を小さく形成してなることを特徴とする請求項１に記載の車両用前照灯。
The vehicle headlamp according to claim 1, wherein the light guide body is formed so that a cross-sectional area is gradually reduced as the distance from the light source is optically increased.
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