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EP0974786B1 - Headlamp of the projector type for vehicles - Google Patents

Headlamp of the projector type for vehicles

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Publication number
EP0974786B1
EP0974786B1 EP99111395A EP99111395A EP0974786B1 EP 0974786 B1 EP0974786 B1 EP 0974786B1 EP 99111395 A EP99111395 A EP 99111395A EP 99111395 A EP99111395 A EP 99111395A EP 0974786 B1 EP0974786 B1 EP 0974786B1
Authority
EP
European Patent Office
Prior art keywords
reflector
projection
lens
lamp
reflection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99111395A
Other languages
German (de)
French (fr)
Other versions
EP0974786A3 (en
EP0974786A2 (en
Inventor
Michael Werner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP0974786A2 publication Critical patent/EP0974786A2/en
Publication of EP0974786A3 publication Critical patent/EP0974786A3/en
Application granted granted Critical
Publication of EP0974786B1 publication Critical patent/EP0974786B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/36Combinations of two or more separate reflectors

Definitions

  • the invention relates to a projection system for a motor vehicle with at least one lamp or lamp filament, a reflector system and a projection lens according to claim 1, see e.g. DE 4036031 C.
  • Headlight assemblies for motor vehicles are known in various ways. Nearly all headlamp assemblies for motor vehicles contain two different reflectors for dipped and main beam. The two reflectors mentioned are either arranged side by side in a common headlight housing, or arranged in two separate headlight housings. In both cases, namely the quasi side-by-side arrangement of the reflectors, two light sources or two lamps are also necessary.
  • the provision of low beam and high beam is required by law.
  • the high beam In its geometrical positioning between the light source and the respective reflector, the high beam generates an intense light cone directed across the roadway for illuminating both the roadway and the roadway surroundings in front of the motor vehicle.
  • the said low beam generated in its positioning on the one hand between the lamp and reflector and of course the reflector based on the headlight geometry a cone of light that is directed exclusively at the road and thus has a much shorter range.
  • the so-called dimming of said light on the road should prevent dazzling oncoming traffic.
  • the so-called high beam As soon as the driver visibly approaches a vehicle on the oncoming lane, he switches to low beam to prevent dazzling the oncoming driver.
  • headlight assemblies are known in which two separate light sources are integrated in a common halogen lamp. This said halogen lamp is then assigned to a common reflector. Now changes the driver between dipped beam and high beam, in the manner described above, so only between the two lamp filaments, d. H. the said two light sources switched in the common halogen lamp.
  • this construction described has the advantage that no longer two juxtaposed reflectors are necessary, but that the same function is represented by a common single reflector. This has the consequence that much smaller space in the headlight housing are needed.
  • the two illumination methods are represented by a common reflector because they actually require different reflector geometries. In this respect, such an arrangement is merely a compromise between luminous efficacy and space considerations. The disadvantage, of course, that the luminous efficacy decreases significantly with this quasi-compromise solution, since the reflector can not be optimized for both illumination methods simultaneously.
  • headlight assemblies are known by the so-called projection system.
  • a projection lens is used in particular for generating the high beam, in which the optics in particular the yield of available direct light is significantly increased.
  • Projection lenses are known which have differently ground zones, so that both the dipped beam and the main beam are generated according to the projection type.
  • the invention is therefore the object of developing a headlamp assembly of the generic type such that both the low beam, and the high beam is generated in an efficient manner and directed directed in a corresponding manner and, moreover, the required space is kept compact.
  • the essence of the invention is firstly that two reflector systems are used even in a headlight assembly according to the projection type, namely one for the normal reflection system and the other reflector for the projection system.
  • the projection lens is fixed relative to the reflector of the reflection system.
  • the projection lens is not fixed relative to the reflector of the projection system, but is stationary relative to the reflector of the reflection system.
  • the essential advantage here is that on the one hand, the series arrangement of two reflectors with a common, the two reflectors at a suitable overlapping to each other opening passing, and that exactly such a double reflector system arrangement according to the projection type, d. H. works with a projection lens.
  • said projection lens only collects the light from the projection reflector.
  • the projection reflector is displaceable. That is, not the lens is displaceable together with the projection reflector, but the lens is fixed relative to the reflection reflector and relative to the projection reflector moves. Likewise, an otherwise possible displacement movement of the lamp can be omitted.
  • the lamp, the two reflectors and the lens arranged in alignment on a common optical axis.
  • the relative local strength of the individual elements such as lens and reflection reflector to each other can be done in a preferred embodiment of the invention by a rigid connection.
  • This rigid connection can be given by fixing on a common holding element.
  • This means that the said lens and the reflection reflector are arranged on a common holding frame or holding element.
  • FIG. 1 shows the invention only in its essential elements.
  • the essential elements are the reflection reflector 10, the projection reflector 20, and the lamp 1 and the lens 30.
  • the larger diameter reflection reflector 10 is arranged so that within the same smaller, also parabolic projection reflector 20th Takes place.
  • openings are arranged through which the lamp 1 or the lamp vessel passes.
  • the lens 30 is now positioned at a corresponding distance so that it collects the light reflected from the lamp 1 onto the reflector surface of the projection reflector 20, but not the reflection light of the reflection reflector 10.
  • the arrangement according to the invention is not only functionally advantageous, but it also fulfills the task, keeping the space unaffected compact.
  • Figures 2 and 3 contain only two embodiments of the prior art, which are deliberately avoided with the invention.
  • Figure 2 shows the mobility of the projection reflector, but with the projection lens moves. This leads to a final stroke movement of the lens 30, which protrudes beyond the actually required space in a corresponding position.
  • FIG. 3 shows another possibility in FIG. 3, but due to the movability of the lamp itself, the installation space to the rear must be correspondingly large. This means that even with this design, an increase in the installation space would be the result.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The headlamp arrangement has at least one lamp (1) or lamp coil, a reflector system and a projection list. There are a reflector (10) for the reflector system and a reflector (20) for the projection system. Only the reflector for the projection system can be moved along the optical axis and the projection lens (30) is fixed with reference to the reflector for the reflector system.

Description

Die Erfindung betrifft eine Scheinwerferanordnung nach dem Projektionstyp für ein Kraftfahrzeug mit mindestens einer Lampe bzw. Lampenwendel, einem Reflektorsystem und einer Projektionslinse gemäß Anspruch 1, siehe z.B. die DE 4036031 C.The invention relates to a projection system for a motor vehicle with at least one lamp or lamp filament, a reflector system and a projection lens according to claim 1, see e.g. DE 4036031 C.

Scheinwerferanordnungen für Kraftfahrzeuge sind in verschiedenster Art bekannt. Dabei enthalten nahezu alle Scheinwerferanordnungen für Kraftfahrzeuge zwei unterschiedliche Reflektoren für Abblend- und Fernlicht. Die beiden genannten Reflektoren sind dabei entweder in einem gemeinsamen Scheinwerfergehäuse nebeneinander angeordnet, oder aber in zwei voneinander separierten Scheinwerfergehäusen angeordnet. In beiden Fällen, nämlich der quasi Nebeneinanderanordnung der Reflektoren sind auch zwei Lichtquellen bzw. zwei Lampen notwendig.Headlight assemblies for motor vehicles are known in various ways. Nearly all headlamp assemblies for motor vehicles contain two different reflectors for dipped and main beam. The two reflectors mentioned are either arranged side by side in a common headlight housing, or arranged in two separate headlight housings. In both cases, namely the quasi side-by-side arrangement of the reflectors, two light sources or two lamps are also necessary.

Grundsätzlich ist die Vorsehung von Abblendlicht und Fernlicht gesetzlich vorgeschrieben. Das Fernlicht erzeugt dabei in seiner geometrischen Positionierung zwischen Lichtquelle und jeweiligem Reflektor einen intensiven, über die Fahrbahn hinweg gerichteten Lichtkegel zur Ausleuchtung sowohl der Fahrbahn, als auch der Fahrbahnumgebung vor dem Kraftfahrzeug. Das besagte Abblendlicht erzeugt in seiner Positionierung zum einen zwischen Lampe und Reflektor und natürlich auch dem Reflektor bezogen auf die Scheinwerfergeometrie einen Lichtkegel, der ausschließlich auf die Fahrbahn gerichtet ist und somit eine sehr viel kürzere Reichweite hat. Das sogenannte Abblenden des besagten Lichtes auf die Fahrbahn soll eine Blendung des Gegenverkehrs verhindern. Üblicherweise wird während einer Fahrt in Nacht- oder Abendstunden, soweit dies notwendig ist, vom sogenannten Fernlicht Gebrauch gemacht. Sobald sich für den Fahrzeugführer sichtbar ein Fahrzeug auf der Gegenfahrbahn nähert, schaltet er auf Abblendlicht um, um eine Blendung des entgegenkommenden Fahrzeugführers zu verhindern.Basically, the provision of low beam and high beam is required by law. In its geometrical positioning between the light source and the respective reflector, the high beam generates an intense light cone directed across the roadway for illuminating both the roadway and the roadway surroundings in front of the motor vehicle. The said low beam generated in its positioning on the one hand between the lamp and reflector and of course the reflector based on the headlight geometry a cone of light that is directed exclusively at the road and thus has a much shorter range. The so-called dimming of said light on the road should prevent dazzling oncoming traffic. Usually, during a drive in the night or in the evening, as far as necessary, use is made of the so-called high beam. As soon as the driver visibly approaches a vehicle on the oncoming lane, he switches to low beam to prevent dazzling the oncoming driver.

Die besagten Funktionen als solches sind vorgeschrieben. Um dieser Vorschrift genüge zu tun, werden jedoch vielfach Scheinwerferanordnungen wie oben beschrieben konstruiert, die den wesentlichen Nachteil haben, daß sie wegen der doppelten und zum Teil separierten Anordnung erheblichen Bauraum benötigen.The said functions as such are prescribed. In order to comply with this requirement, however, headlamp assemblies are often constructed as described above, which have the significant disadvantage that they require considerable space because of the double and partially separated arrangement.

Darüber hinaus sind jedoch Scheinwerferanordnungen bekannt, bei welcher zwei getrennte Lichtquellen in einer gemeinsamen Halogenlampe integriert sind. Diese besagte Halogenlampe ist dann auch einem gemeinsamen Reflektor zugeordnet. Wechselt nun der Fahrzeugführer zwischen Abblend- und Fernlicht, in der oben beschriebenen Weise, so wird lediglich zwischen den beiden Lampenwendeln, d. h. den besagten beiden Lichtquellen in der gemeinsamen Halogenlampe umgeschaltet. Im Hinblick auf die oben genannte Bauweise hat diese beschriebene Bauweise den Vorteil, daß nicht mehr zwei nebeneinander angeordnete Reflektoren notwendig sind, sondern daß die gleiche Funktion über einen gemeinsamen einzigen Reflektor dargestellt wird. Dies hat zur Konsequenz, daß erheblich kleinere Bauräume im Scheinwerfergehäuse benötigt werden. Dennoch ist es von Nachteil, daß die beiden Beleuchtungsmethoden über einen gemeinsamen Reflektor dargestellt werden, weil sie eigentlich unterschiedliche Reflektorgeometrien bedingen. Insofern ist eine solche Anordnung lediglich ein Kompromiß zwischen Lichtausbeute und Bauraumberücksichtigung. Nachteilig ist natürlich, daß sich mit dieser quasi-Kompromißlösung die Lichtausbeute merklich verringert, da der Reflektor nicht auf beide Ausleuchtungsmethoden gleichzeitig optimiert sein kann.In addition, however, headlight assemblies are known in which two separate light sources are integrated in a common halogen lamp. This said halogen lamp is then assigned to a common reflector. Now changes the driver between dipped beam and high beam, in the manner described above, so only between the two lamp filaments, d. H. the said two light sources switched in the common halogen lamp. In view of the above construction, this construction described has the advantage that no longer two juxtaposed reflectors are necessary, but that the same function is represented by a common single reflector. This has the consequence that much smaller space in the headlight housing are needed. Nevertheless, it is disadvantageous that the two illumination methods are represented by a common reflector because they actually require different reflector geometries. In this respect, such an arrangement is merely a compromise between luminous efficacy and space considerations. The disadvantage, of course, that the luminous efficacy decreases significantly with this quasi-compromise solution, since the reflector can not be optimized for both illumination methods simultaneously.

Darüber hinaus sind Scheinwerferanordnungen nach dem sogenannten Projektionssystem bekannt. Hierbei wird insbesondere zur Erzeugung des Fernlichtes eine Projektionslinse verwendet, bei welcher durch die Optik insbesondere die Ausbeute beim verfügbaren direkten Licht erheblich gesteigert wird. Dabei sind Projektionslinsen bekannt, die unterschiedlich geschliffene Zonen aufweisen, so daß sowohl das Abblendlicht, als auch das Fernlicht nach dem Projektionstyp erzeugt wird.In addition, headlight assemblies are known by the so-called projection system. Here, a projection lens is used in particular for generating the high beam, in which the optics in particular the yield of available direct light is significantly increased. Projection lenses are known which have differently ground zones, so that both the dipped beam and the main beam are generated according to the projection type.

Es kann jedoch von erheblichem Vorteil sein, dennoch die beiden Ausleuchtmethoden zu separieren und nur eine davon über die Projektionslinse zu gestalten.However, it can be of considerable advantage to still separate the two illumination methods and to design only one of them via the projection lens.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Scheinwerferanordnung der gattungsgemäßen Art dahingehend weiterzubilden, daß sowohl das Abblendlicht, als auch das Fernlicht auf effiziente Weise erzeugt und in entsprechender Weise gerichtet abgestrahlt wird und überdies der benötigte Bauraum kompakt gehalten wird.The invention is therefore the object of developing a headlamp assembly of the generic type such that both the low beam, and the high beam is generated in an efficient manner and directed directed in a corresponding manner and, moreover, the required space is kept compact.

Die gestellte Aufgabe ist bei einer Scheinwerferanordnung der gattungsgemäßen Art erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst.The stated object is achieved according to the invention in a headlamp assembly of the generic type by the characterizing features of claim 1.

Weitere vorteilhafte Ausgestaltungen der erfindungsgemäßen Scheinwerferanordnung sind in den übrigen abhängigen Ansprüchen angegeben.Further advantageous embodiments of the headlamp assembly according to the invention are specified in the remaining dependent claims.

Der Kern der Erfindung besteht zum einen darin, daß auch bei einer Scheinwerferanordnung nach dem Projektionstyp zwei Reflektorsysteme verwendet werden, nämlich einen für das normale Reflektionssystem und der weitere Reflektor für das Projektionssystem. Dabei ist lediglich der Reflektor des Projektionssystems entlang der optischen Achse verschiebbar und die Projektionslinse ist relativ zum Reflektor des Reflektionssystems ortsfest. Hierbei ist wesentlich deutlich zu machen, daß die Projektionslinse nicht relativ zum Reflektor des Projektionssystems ortsfest ist, sondern relativ zum Reflektor des Reflektionssystems ortsfest ist. Der wesentliche Vorteil ist hierbei, daß zum einen die Hintereinanderanordnung zweier Reflektoren mit einer gemeinsamen, die beiden Reflektoren an einer geeigneten zueinander überlappenden Öffnung hindurchreichend angeordnet ist, und daß genau eine solche doppelte Reflektorsystemanordnung nach dem Projektionstyp, d. h. mit einer Projektionslinse arbeitet. Diese besagte Projektionslinse sammelt natürlich lediglich das Licht aus dem Projektionsreflektor.The essence of the invention is firstly that two reflector systems are used even in a headlight assembly according to the projection type, namely one for the normal reflection system and the other reflector for the projection system. In this case, only the reflector of the projection system along the optical axis is displaceable and the projection lens is fixed relative to the reflector of the reflection system. It is essential to make it clear that the projection lens is not fixed relative to the reflector of the projection system, but is stationary relative to the reflector of the reflection system. The essential advantage here is that on the one hand, the series arrangement of two reflectors with a common, the two reflectors at a suitable overlapping to each other opening passing, and that exactly such a double reflector system arrangement according to the projection type, d. H. works with a projection lens. Of course, said projection lens only collects the light from the projection reflector.

In weiterer vorteilhafter Ausgestaltung der Erfindung ist der Projektionsreflektor verschiebbar. Das heißt, verschiebbar ist nicht die Linse zusammen mit dem Projektionsreflektor, sondern die Linse ist bezogen auf den Reflektionsreflektor ortsfest und dazu relativ bewegt sich der Projektionsreflektor. Ebenso kann eine ansonsten mögliche Verschiebebewegung der Lampe unterbleiben.In a further advantageous embodiment of the invention, the projection reflector is displaceable. That is, not the lens is displaceable together with the projection reflector, but the lens is fixed relative to the reflection reflector and relative to the projection reflector moves. Likewise, an otherwise possible displacement movement of the lamp can be omitted.

Der erhebliche Vorteil ergibt sich aus der konstruktiven Gegebenheit bzw. den konstruktiven Abmessungen zwischen Projektionsreflektor und Reflektionsreflektor zum einen, und zum anderen aus der entsprechenden erfindungsgemäßen Positionierung bzw. Bewegbarkeit. Da der Projektionsreflektor quasi innerhalb des ebenfalls parabolischen Reflektionsreflektors angeordnet ist und von kleinerem, d. h. erheblich kleinerem Durchmesser ist, benötigt eine verschiebliche Anordnung des Projektionsreflektors keinen zusätzlichen Bauraum im Scheinwerfergehäuse. Eine Bewegbarkeit der Projektionslinse, die deutlich vor den Reflektoren liegt, würde eine Erhöhung der Tiefe des Scheinwerfergehäuses bedingen. Gleiches gilt für den Fall, daß die Lampe selbst verschiebbar sein sollte. Auch dies würde eine Erhöhung der nötigen Tiefe des Scheinwerfergehäuses bedingen.The considerable advantage results from the structural condition or the constructive dimensions between projection reflector and reflection reflector for one, and on the other hand from the corresponding positioning or mobility according to the invention. Since the projection reflector is arranged, as it were, within the likewise parabolic reflection reflector and is of smaller, ie considerably smaller diameter, a displaceable arrangement of the projection reflector does not require any additional installation space in the spotlight housing. A mobility of the projection lens, which lies well in front of the reflectors, would require an increase in the depth of the spotlight housing. The same applies in the event that the lamp itself should be displaceable. This would also require an increase in the necessary depth of the headlight housing.

Insgesamt ist durch die erfindungsgemäße Anordnung und Bewegbarkeit der besagten Elemente gewährleistet, daß zum einen zwar einzelne aber ineinander angeordnete Reflektoren mit einer gemeinsamen Lichtquelle vorgesehen werden können, daß diese Anordnung dann zusätzlich nach dem Projektionstyp betreibbar ist und zwischen Fernlicht und Abblendlicht geschaltet werden kann.Overall, it is ensured by the inventive arrangement and mobility of said elements that on the one hand though individual reflectors arranged one inside the other can be provided with a common light source that this arrangement is then additionally operable according to the projection type and can be switched between high beam and low beam.

Hierzu sind in weiterer vorteilhafter Ausgestaltung der Erfindung natürlich, wie oben bereits ausgeführt, die Lampe, die beiden Reflektoren sowie die Linse auf einer gemeinsamen optischen Achse fluchtend angeordnet. Die relative Ortsfestigkeit der einzelnen Elemente wie Linse und Reflektionsreflektor zueinander kann in vorteilhafter Ausgestaltung der Erfindung durch eine starre Verbindung erfolgen. Diese starre Verbindung kann durch Fixieren auf einem gemeinsamen Halteelement gegeben sein. Dies bedeutet, daß die besagte Linse und der Reflektionsreflektor auf einem gemeinsamen Halterahmen oder Halteelement angeordnet sind.For this purpose, of course, in a further advantageous embodiment of the invention, as already stated above, the lamp, the two reflectors and the lens arranged in alignment on a common optical axis. The relative local strength of the individual elements such as lens and reflection reflector to each other can be done in a preferred embodiment of the invention by a rigid connection. This rigid connection can be given by fixing on a common holding element. This means that the said lens and the reflection reflector are arranged on a common holding frame or holding element.

Die Erfindung ist in der Zeichnung dargestellt und nachfolgend näher beschrieben.The invention is illustrated in the drawing and described in more detail below.

Es zeigt:

Figur 1:
Erfindungsgemäße Scheinwerferanordnung
Figur 2:
Dargestellte Bauraumerhöhung durch gemeinsam bewegliche Linse und Projektionsreflektor.
Figur 3:
Bauraumerhöhung durch verschiebbare Lampe
It shows:
FIG. 1:
Headlight assembly according to the invention
FIG. 2:
Illustrated installation space increase by jointly movable lens and projection reflector.
FIG. 3:
Installation space increase by sliding lamp

Figur 1 zeigt die Erfindung lediglich in ihren wesentlichen Elementen.Figure 1 shows the invention only in its essential elements.

Die wesentlichen Elemente sind der Reflektionsreflektor 10, der Projektionsreflektor 20, sowie die Lampe 1 und die Linse 30. Wie aus Figur 1 ersichtlich, ist der mit größerem Durchmesser vorliegende Reflektionsreflektor 10 so angeordnet, daß innerhalb desselben der im Durchmesser kleinere, ebenfalls parabolische Projektionsreflektor 20 Platz findet. Im Bereich der tiefsten Stellen der beiden Reflektoren 10 und 20 sind Öffnungen angeordnet, durch die hindurch die Lampe 1 bzw. das Lampengefäß hindurchreicht. Auf der sich ergebenden optischen Achse ist nun in entsprechendem Abstand die Linse 30 so positioniert, daß sie das von der Lampe 1 auf die Reflektorfläche des Projektionsreflektors 20 reflektierte Licht sammelt, nicht jedoch das Reflektionslicht des Reflektionsreflektors 10.The essential elements are the reflection reflector 10, the projection reflector 20, and the lamp 1 and the lens 30. As can be seen from Figure 1, the larger diameter reflection reflector 10 is arranged so that within the same smaller, also parabolic projection reflector 20th Takes place. In the region of the lowest points of the two reflectors 10 and 20, openings are arranged through which the lamp 1 or the lamp vessel passes. On the resulting optical axis, the lens 30 is now positioned at a corresponding distance so that it collects the light reflected from the lamp 1 onto the reflector surface of the projection reflector 20, but not the reflection light of the reflection reflector 10.

Um nun zwischen Fernlicht und Abblendlicht hin- und herschalten zu können, ist lediglich der Projektionsreflektor 20 entlang der optischen Achse um einen bestimmten Betrag verschiebbar. Dieser Betrag muß so groß sein, daß der Hauptteil des von der Lampe 1 emittierten Lichtes auf den Reflektionsreflektor 10 fällt. Hierbei ist wesentlich, daß sowohl die Lampe 1, als auch die Linse 30 sowie auch der Reflektor 10 ortsfest bleiben. Das heißt, die Projektionslinse 30, und im wesentlichen der Reflektionsreflektor 10 sind zueinander relativ gesehen ortsfest. Das heißt, die Linse 30 kann relativ zum Reflektionsreflektor 10 nicht bewegt werden, wobei aber durch die Verschiebbarkeit des Projektionsreflektors 20 eine Relativbewegung zwischen Linse 30 und Projektionsreflektor 20 entsteht. Diese Defokussierung im Hinblick auf das Fokuslicht der Lampe auf den Projektionsreflektor begünstigt hier das Auskoppeln des Lichtes aus dem Projektionsbereich, so daß der überwiegende Teil des Lichtes für den Reflektionsreflektor 10 übrig bleibt. Hierbei ist bereits zu erkennen, daß eine axiale Verschiebung der Linse 30 und/oder der Lampe 1 gänzlich vermieden wird. Durch die lediglich realisierte Verschiebbarkeit einzig des Projektionsreflektors wird aber kein zusätzlicher Bauraum benötigt. Dies ergibt sich aus der Konkavität des parabolischen Projektionsreflektors, der sich zwar in Richtung Linse 30 bewegt, aber in seiner Hubbewegung von der Linse nicht behindert wird. Im übrigen erreicht der Projektionsreflektor mit einer seiner Körperkanten in keiner Position eine der Bauraumbegrenzungen nahe der Linse 30 oder nahe dem Lampengefäß 1. Hingegen eine Hubbewegung der Lampe 1 oder der Linse 30 würde eine Bauraumerhöhung bedingen.In order to switch back and forth between the high beam and low beam, only the projection reflector 20 along the optical axis by a certain amount is displaced. This amount must be so large that the majority of the light emitted by the lamp 1 falls on the reflection reflector 10. It is essential that both the lamp 1, as well as the lens 30 and the reflector 10 remain stationary. That is, the projection lens 30, and substantially the reflection reflector 10 are relatively fixed relative to each other. That is, the lens 30 can not be moved relative to the reflection reflector 10, but due to the displaceability of the projection reflector 20, a relative movement between the lens 30 and the projection reflector 20 is formed. This defocusing with respect to the focus light of the lamp on the projection reflector favors here the coupling out of the light from the projection area, so that the majority of the light remains for the reflection reflector 10. It can already be seen that an axial displacement of the lens 30 and / or the lamp 1 is completely avoided. Due to the only realized displaceability only of the projection reflector but no additional space is needed. This results from the concavity of the parabolic projection reflector, which moves in the direction of lens 30, but is not hindered in its lifting movement of the lens. Moreover, the projection reflector reaches with one of its body edges in any position one of the space limitations near the lens 30 or near the Lamp vessel 1. However, a lifting movement of the lamp 1 or the lens 30 would require an increase in space.

Somit ist die erfindungsgemäße Anordnung nicht nur funktionsmäßig vorteilhaft, sondern sie erfüllt auch die aufgabengemäße Maßgabe, den Bauraum unbeeinflußt kompakt zu halten.Thus, the arrangement according to the invention is not only functionally advantageous, but it also fulfills the task, keeping the space unaffected compact.

Figur 2 und 3 enthalten lediglich zwei Ausgestaltungen aus dem Stand der Technik, die mit der Erfindung bewußt vermieden sind. Figur 2 zeigt die Bewegbarkeit ebenfalls des Projektionsreflektors, wobei aber sich die Projektionslinse mitbewegt. Dies führt zu einer letztendlichen Hubbewegung der Linse 30, die bei entsprechender Stellung über den eigentlich benötigten Bauraum hinausragt. Eine andere Möglichkeit zeigt Figur 3, wobei aber durch die Bewegbarkeit der Lampe selbst der Bauraum nach hinten entsprechend groß ausgebildet werden muß. Das heißt, auch bei dieser Bauform würde eine Erhöhung des Bauraumes die Folge sein.Figures 2 and 3 contain only two embodiments of the prior art, which are deliberately avoided with the invention. Figure 2 shows the mobility of the projection reflector, but with the projection lens moves. This leads to a final stroke movement of the lens 30, which protrudes beyond the actually required space in a corresponding position. Another possibility is shown in FIG. 3, but due to the movability of the lamp itself, the installation space to the rear must be correspondingly large. This means that even with this design, an increase in the installation space would be the result.

Somit zeigt sich, daß auf sehr effiziente einfache Weise ein entsprechend umfangreiches technisch gut ausgestattetes Scheinwerferelement auch kompakt sein kann.Thus, it turns out that in a very efficient simple way a correspondingly extensive technically well-equipped headlight element can also be compact.

Claims (4)

  1. Headlamp arrangement of the projection type for a motor vehicle, having at least one lamp or lamp coil (1), a reflector system and a projection lens (30), a reflector (10) being provided for the reflection system, and a further reflector (20) being provided for the projection system, characterized in that only the reflector (20) of the projection system can be displaced along the optical axis, and the projection lens (30) is stationary relative to the reflector (10) of the reflection system.
  2. Headlamp arrangement of the projection type according to Claim 1, characterized in that the lamp (1), the two reflectors (10, 20) and the lens (30) are arranged on a common optical axis in an aligned fashion.
  3. Headlamp arrangement of the projection type according to Claim 2, characterized in that the lens (30) is rigidly connected to the reflector (10) of the reflection system.
  4. Headlamp arrangement of the projection type according to Claim 3, characterized in that rigid connection of reflector (10) and lens (30) is provided by fixing on a common holding element.
EP99111395A 1998-07-18 1999-06-11 Headlamp of the projector type for vehicles Expired - Lifetime EP0974786B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19832466 1998-07-18
DE19832466A DE19832466A1 (en) 1998-07-18 1998-07-18 Projection type headlamp assembly for a motor vehicle

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EP0974786A2 EP0974786A2 (en) 2000-01-26
EP0974786A3 EP0974786A3 (en) 2001-09-26
EP0974786B1 true EP0974786B1 (en) 2006-08-16

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004259541A (en) * 2003-02-25 2004-09-16 Cateye Co Ltd lighting equipment
DE10353087A1 (en) * 2003-11-13 2005-06-16 Bayerische Motoren Werke Ag vehicle light
DE102006047837A1 (en) * 2006-10-10 2008-04-17 Volkswagen Ag Motor vehicle headlight, has parabolic reflector, whose focus point is brought in combination with light source for forming driving light, where reflector is focused and defocused for forming day driving light opposite to light source
JP4445502B2 (en) * 2006-10-30 2010-04-07 株式会社シマノ Bicycle lighting device
DE102007049309B4 (en) * 2007-10-15 2013-04-11 Automotive Lighting Reutlingen Gmbh Projection module of a motor vehicle headlight
CN102410496A (en) * 2010-09-20 2012-04-11 刘克迅 Concentrating device of light source and its lamp
EP2796778B1 (en) * 2013-04-26 2017-02-01 Hella KGaA Hueck & Co. Lighting system
DE102014008043A1 (en) * 2014-05-28 2015-12-03 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) vehicle headlights

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826988A1 (en) * 1988-08-09 1990-02-15 Kodak Ag VEHICLE HEADLIGHTS
DE4036031C1 (en) * 1990-11-13 1992-02-27 Hella Kg Hueck & Co, 4780 Lippstadt, De
JP2579256Y2 (en) * 1992-04-30 1998-08-20 株式会社小糸製作所 Variable luminous flux pattern type 4-light headlight
JP2827147B2 (en) * 1993-07-09 1998-11-18 株式会社小糸製作所 Variable light distribution type lamp for reflector driven vehicle
FR2767182B1 (en) * 1997-08-11 1999-09-03 Valeo Vision VARIABLE BEAM PROJECTOR, ESPECIALLY FOR VEHICLES

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EP0974786A3 (en) 2001-09-26
DE59913776D1 (en) 2006-09-28
EP0974786A2 (en) 2000-01-26
ATE336692T1 (en) 2006-09-15
DE19832466A1 (en) 2000-02-17

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