EP1092111B1 - Projecting headlight for motor vehicles - Google Patents

Projecting headlight for motor vehicles Download PDF

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Publication number
EP1092111B1
EP1092111B1 EP99931053A EP99931053A EP1092111B1 EP 1092111 B1 EP1092111 B1 EP 1092111B1 EP 99931053 A EP99931053 A EP 99931053A EP 99931053 A EP99931053 A EP 99931053A EP 1092111 B1 EP1092111 B1 EP 1092111B1
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EP
European Patent Office
Prior art keywords
projection lens
headlight
projection
motor vehicles
holding frame
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
EP99931053A
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German (de)
French (fr)
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EP1092111A1 (en
Inventor
Michael Werner
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Volkswagen AG
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Volkswagen AG
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Publication of EP1092111A1 publication Critical patent/EP1092111A1/en
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    • 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
    • F21S41/50Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F21S41/55Attachment thereof
    • 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
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25Projection lenses
    • F21S41/255Lenses with a front view of circular or truncated circular outline
    • 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
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25Projection lenses
    • F21S41/275Lens surfaces, e.g. coatings or surface structures
    • 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
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29Attachment thereof
    • F21S41/295Attachment thereof specially adapted to projection lenses

Definitions

  • the invention relates to a projection headlight for motor vehicles, with essentially following elements, a headlight housing in which a lamp element is arranged, a parabolic mirror, a projection lens and one Holding frame at least for the projection lens according to the preamble of the claim 1.
  • Projection headlights are widely used in today's automotive engineering a projection headlight consists of the elements specified above.
  • the Bulbs, d. H. the lamp is in the focus of a generally parabolic one Arranged reflector.
  • the reflection element Lens positioned with respect to its focal point.
  • the individual elements must be held in a fixed position with respect to each other become. This means that the lamp should have said focus except for slight vibrations adhere as far as possible.
  • These to each other and coordinated optical elements are used for this reason held a frame, the holding frame in many cases all of the said Connects and holds elements together by connecting them in their geometric Elements to be fixed in relation to each other such as projection lens, lamp and Reflection element can be arranged on a common by arranging these elements Holding frame the same vibrationally coupled such that vehicle vibrations the named three elements at most together but never relative swing or can swing to each other.
  • Another aspect is the consideration of the space required within the Housing of such a projection headlight. Because the housing dimensions by the geometrical or geometrically optical parameters in a given Dimensions must lie, and the space is otherwise narrowly limited, are any Changes to the illumination behavior or the optical design are extremely difficult provided that the installation space is not increased. The trend is, moreover, to make the lenses relatively small in diameter. Small-sized lenses can however due to the intense luminance, i.e. illumination per unit area, Generate glare. On the other hand, they guide the viewer, i.e. the driver is more accommodating Vehicles fail because the light cone emerging from the vehicle in the Diameter appears too small
  • a dimmed vehicle headlight which from an ellipsoidal reflector, one in the first focal point of the reflector arranged light source and also with the elements already mentioned above is also here a tubular or more specifically cup-shaped Specified frame or frame arrangement for holding the lens.
  • this is designed so complex that they do not make optimal use of space or serves to magnify the image of the projection lens
  • DE 38 27 594 C2 also discloses a dimmed vehicle headlight, in which a similar frame element is provided for the lens holder
  • the frame element in turn carries the various components of the Headlights in the above sense, but the construction is not based on it make optimal use of the installation space or the visual impression of the projection lens in terms of dimensions to enlarge.
  • DE-A-196 21 254 discloses a headlight with one illuminated Area of the projection lens ring-shaped, one-piece molding, there looks at least approximately frustoconical.
  • the molding there is translucent designed and serves to reduce the glare compared to known ones of a relatively illuminated headlamp by the molded area increases the illuminated area of the headlamp. As a result, the headlamp is perceived as less disruptive in road traffic.
  • the headlight specified there also builds relatively large.
  • the present invention is therefore based on the object of a projection headlight for motor vehicles of the generic type in that the optical impression of the diameter of the projection lens is enlarged and opposite known headlights a significant gain in installation space is achieved.
  • the essence of the invention is that the projection lens on the parabolic mirror facing side an inner, properly illuminated area has, which is surrounded by an annular integral molding
  • This ring-shaped, one-piece molding on the projection lens shifts the actual one in the core area illuminated lens body clearly above the holding frame out to vome. In other words, this means that the holding frame is clearly behind the actual lens body is set back, so that a significant gain build space
  • the projection lens a convex outer contour that points outwards, So on the side facing away from the parabolic mirror lies the convexity the diameter given according to the invention designed projection lens is larger than the illuminated interior of the lens. That is, on the convex The headlight appears larger on the side of the projection lens, although the headlight actually appears Illuminated area, in this case directly illuminated by the parabolic mirror In other words, this means that the projection lens is enlarged in its design is shown, during which the actual direct illumination is smaller
  • the parabolic mirror and the other optical geometric dimensions are, however, dimensioned such that the almost entire core light portion is based on the said inner illuminated area falls, which is smaller in diameter than the outer diameter the projection lens.
  • the said surface of the said molding can also be optically sealed chrome-plated or otherwise metallized, or even etched. In the latter case this leads to a diffuse scattering of the residual light, which is similar in effect, like an optically dense design.
  • the Fresnell structures mentioned above can also be optically sealed chrome-plated or otherwise metallized, or even etched. In the latter case this leads to a diffuse scattering of the residual light, which is similar in effect, like an optically dense design. The same applies to the Fresnell structures mentioned above.
  • the said annular formation in the area extension mentioned To make it optically tight is that by attached to the holding frame Sheet metal cladding elements, the said optically sealed cover is made as Already stated above, the lens is indeed mechanically fixed by a frame is connected to the other headlight components. That is, the The lens advantageously has lateral formations or a protruding edge, which is clasped by clamping elements of said holding frame. On the opposite Side in the area of these clamp elements can then sheet metal cladding rings also arranged in connection with said dimensions be, which cause said optically sealed cover.
  • Figure 1 shows the headlight in side view, only the most important Components are shown.
  • the headlight housing is not shown here, but only that behind the delimiting headlight glass 10 the projection lens 1, which is placed in a holding frame 4 or by the same is held.
  • the lamp element 6 is also connected to the holding frame 4, which is roughly in the focus of the parabolic mirror 7 is arranged.
  • the mechanically rigid connection between the holding frame 4 and the parabolic mirror 7 is also not shown here
  • the projection lens 1 has a molding 2 in the edge area, which is ring-shaped and is integrally formed on the projection lens. In other words, that the projection lens is in one piece and the edge area by the corresponding Ground or the mechanical processing of the projection lens is formed.
  • a correspondingly illuminated interior area can be seen, which extends over the entire surface of the flat, ground, polished lens side extends here the flat ground area is that of the lamp element 6 above the parabolic mirror 7 is illuminated directly.
  • the light thrown out here is the one above Defined core light
  • Formation 2 of the projection lens placed on the edge is on the one mentioned above inner area 3 also beveled side.
  • This bevel is however only by way of example, so not mandatory.
  • This bevel makes stray light decoupled from the actual core light cone. Otherwise it becomes the inner one Area 3, which is essentially directly illuminated, defines that on the other side of the projection lens 1 molded concavity extends over the inner area 3 also beyond the area of the molding 2.
  • Figure 2 shows in the corresponding detail circle that the molding 2 on the corresponding bevelled surface matted, or optically in the manner already described above This surface can be matted or covered optically tight, which then has the same effect, namely to decouple the scattered light.
  • FIG. 3 shows a corrugation of the said surface in order to produce Fresnell structures, which also have the effect of scattered light, i.e. the light outside the core light cone conscious, i.e. to use for ambient lighting.
  • FIG. 4 shows a further possibility, namely a sheet metal cladding on the holding frame 4 to attach the projection lens in this rear area to the full Extending the bevel of the projection 2 optically tightly covered
  • Projection lens reaches behind and so far that the said bevel optically is tightly covered.
  • Another variant can consist in the sheet metal cladding of the holding frame 4 to be metallized on the side facing the projection mirror and such to shape that the stray light back into the usable core light cone of the mirror reflect back. In addition to the aforementioned gain in installation space, this would have been even greater Luminous efficacy result.

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

Abstract

The invention relates to a projecting headlight for motor vehicles, substantially comprising a headlight housing, a lamp, a parabolic mirror, a projection lens and a holding frame for the individual components. To be able externally to enlarge the optical design of the projection lens in a projecting headlight for motor vehicles without unnecessarily increasing the overall dimensions, the invention provides for the projection lens (1) on the side facing the mirror to have an internal area (3) which is illuminated as prescribed and surrounded by an annular single-piece shaped part (2) which is embodied such that the holding frame (4) of the projection lens (1) is essentially positioned rearwards of the illuminated internal body of the projection lens.

Description

Die Erfindung betrifft einen Projektionsscheinwerfer für Kraftfahrzeuge, mit im wesentlichen folgenden Elementen, einem Scheinwerfergehäuse, in welchem ein Lampenelement angeordnet ist, einem parabolischer Spiegel, einer Projektionslinse sowie einem Halterahmen zumindest für die Projektionslinse gemäß Oberbegriff des Patentanspruches 1.The invention relates to a projection headlight for motor vehicles, with essentially following elements, a headlight housing in which a lamp element is arranged, a parabolic mirror, a projection lens and one Holding frame at least for the projection lens according to the preamble of the claim 1.

Projektionsscheinwerfer sind im heutigen Kraftfahrzeugbau weit verbreitet Im wesentlichen besteht ein Projektionsscheinwerfer aus den oben angegebenen Elementen. Das Leuchtmittel, d. h. die Lampe ist dabei in dem Fokus eines in der Regel parabolischen Reflektors angeordnet. In Lichtabstrahlrichtung des Reflexionsetements ist die Linse hinsichtlich ihres Brennpunktes positioniert. Bei vorgegebenen Leuchtweiten, die bei Kraftfahrzeugen in einem bestimmten Rahmen vorgeschrieben sind, ergeben sich feste geometrische Abmessungen. Diese Abmessungen hängen überdies auch davon ab, welche laterale Ausdehnung der Lichtkegel beim Auftreffen auf die Fahrbahn haben soll.Projection headlights are widely used in today's automotive engineering a projection headlight consists of the elements specified above. The Bulbs, d. H. the lamp is in the focus of a generally parabolic one Arranged reflector. In the direction of light emission of the reflection element Lens positioned with respect to its focal point. With given lighting ranges, the are prescribed for motor vehicles within a certain framework fixed geometric dimensions. These dimensions also depend on it the lateral extent of the light cone when it hits the road should.

Des weiteren müssen die einzelnen Elemente zueinander in fixierter Position gehalten werden. Das heißt die Lampe soll bis auf geringe Vibrationshübe den besagten Fokus weitestgehend einhalten. Das gleiche gilt auch für die Projektionslinse. Diese zueinander und aufeinander abgestimmten optischen Elemente werden aus diesem Grund mit einem Rahmen gehalten, wobei der Halterahmen in vielen Fällen alle die besagten Elemente miteinander verbindet und hält Durch die Verbindung der in ihrer geometrischen Position zueinander zu fixierenden Elemente wie Projektionslinse, Lampe und Reflexionselement können durch Anordnung dieser Elemente auf einen gemeinsamen Halterahmen dieselben erschütterungsmäßig derart gekoppelt werden, daß durch Fahrzeugvibrationen die benannten drei Elemente allenfalls gemeinsam aber niemals relativ zueinander schwingen bzw. schwingen können.Furthermore, the individual elements must be held in a fixed position with respect to each other become. This means that the lamp should have said focus except for slight vibrations adhere as far as possible. The same applies to the projection lens. These to each other and coordinated optical elements are used for this reason held a frame, the holding frame in many cases all of the said Connects and holds elements together by connecting them in their geometric Elements to be fixed in relation to each other such as projection lens, lamp and Reflection element can be arranged on a common by arranging these elements Holding frame the same vibrationally coupled such that vehicle vibrations the named three elements at most together but never relative swing or can swing to each other.

Ein weiterer Aspekt ist die Berücksichtigung des benötigten Bauraumes innerhalb des Gehäuses eines solchen Projektionsscheinwerfers. Da die Gehäuseabmessungen durch die geometrischen bzw. geometrisch optischen Parameter in einem vorgegebenen Maße liegen müssen, und der Bauraum im übrigen eng begrenzt ist, sind jedwede Änderungen am Ausleuchtverhalten oder am optischen Design ausgesprochen schwierig unter der Maßgabe, den Bauraum nicht zu erhöhen. Der Trend geht im übrigen dahin, die Linsen im Durchmesser relativ klein zu gestalten. Klein gestaltete Linsen können jedoch wegen der intensiven Leuchtdichte, also Ausleuchtung pro Flächeneinheit, Blendungen erzeugen. Zum anderen leiten sie den Betrachter, d.h. den Fahrer entgegenkommender Fahrzeuge fehl, weil der am Fahrzeug austretende Lichtkegel im Durchmesser zu klein erscheintAnother aspect is the consideration of the space required within the Housing of such a projection headlight. Because the housing dimensions by the geometrical or geometrically optical parameters in a given Dimensions must lie, and the space is otherwise narrowly limited, are any Changes to the illumination behavior or the optical design are extremely difficult provided that the installation space is not increased. The trend is, moreover, to make the lenses relatively small in diameter. Small-sized lenses can however due to the intense luminance, i.e. illumination per unit area, Generate glare. On the other hand, they guide the viewer, i.e. the driver is more accommodating Vehicles fail because the light cone emerging from the vehicle in the Diameter appears too small

Darüber hinaus ist ein kleiner Linsendurchmesser nachteilig für das optische Design des Scheinwerfers.In addition, a small lens diameter is disadvantageous for the optical design the headlight.

Aus der DE 43 05 633 A1 ist ein Projektionsscheinwerfer bzw. eine Linsenscheinwerferanordnung bekannt, die sich jedoch lediglich mit der Verbesserung der Lage der Linse befaßt Hierzu wird eine rohrförmige Befestigungseinheit vorgesehen, die zweiteilig ist und ineinanderschiebbar die Linse dazwischen hält Weitere elastische Elemente zwischen den Befestigungselementen und der Linse sollen die Position der Linse als solches verbessern. Nachteilig ist hierbei zum einen, daß durch die Verwendung elastischer Elemente lediglich im Linsenbereich eine Abkopplung der Schwingungen im Rahmen desselben und der Linse als solches bewirkt wird. Durch diese mechanische bzw. schwingungsmäßige Abkopplung wird nachteiligerweise wieder eine Relativbewegung zu den übrigen hinsichtlich ihrer geometrischen Position sensiblen Elemente bewirkt Das heißt, bei Erschütterungen macht sich dieses im Ausleuchtverhalten des Scheinwerfers direkt bemerkbar.DE 43 05 633 A1 describes a projection headlamp or a lens headlamp arrangement known, however, only with the improvement of the position of the lens For this purpose, a tubular fastening unit is provided, which is in two parts and the lens between them holds other elastic elements in between the fasteners and the lens should be the position of the lens as such improve. The disadvantage here is that the use of elastic Elements only decoupling the vibrations in the lens area Frame of the same and the lens as such is effected. Through this mechanical or vibration decoupling disadvantageously becomes a relative movement again to the other elements that are sensitive with regard to their geometric position That means, when shaken, this affects the illumination behavior of the Headlights immediately noticeable.

Darüber hinaus ist bei diesem Stand der Technik keine Maßnahme angegeben bei minimalem Linsendurchmesser das optische Bild desselben zu verbessem.In addition, no measure is given in this prior art with minimal Lens diameter to improve the optical image of the same.

Aus der DE 35 16 813 A1 ist ein abgeblendeter Fahrzeugscheinwerfer bekannt, welcher aus einem ellipsoidförmigen Reflektor, einer in erstem Brennpunkt des Reflektors angeordnete Lichtquelle und im übrigen auch mit den oben bereits genannten Elementen versehen ist Auch hierbei ist eine rohrförmige oder besser gesagt becherförmige Gestell- oder Rahmenanordnung zur Haltung der Linse angegeben. Diese ist jedoch so aufwendig gestaltet, daß sie nicht einer optimalen Bauraumausnutzung oder zur optischen Vergrößerung des Abbildes der Projektionslinse dientFrom DE 35 16 813 A1 a dimmed vehicle headlight is known, which from an ellipsoidal reflector, one in the first focal point of the reflector arranged light source and also with the elements already mentioned above is also here a tubular or more specifically cup-shaped Specified frame or frame arrangement for holding the lens. However, this is designed so complex that they do not make optimal use of space or serves to magnify the image of the projection lens

Aus der DE 38 27 594 C2 ist ein ebenfalls abgeblendeter Fahrzeugscheinwerfer bekannt, in dem zur Linsenhalterung ein ähnliches Rahmenelement vorgesehen ist Dieses Rahmenelement trägt dabei wiederum die verschiedenen Komponenten des Scheinwerfers im oben genannten Sinne, aber die Bauweise ist nicht darauf abgestellt den Bauraum optimal zu nutzen oder den optischen Eindruck der Projektionslinse abmessungsmäßig zu vergrößern.DE 38 27 594 C2 also discloses a dimmed vehicle headlight, in which a similar frame element is provided for the lens holder The frame element in turn carries the various components of the Headlights in the above sense, but the construction is not based on it make optimal use of the installation space or the visual impression of the projection lens in terms of dimensions to enlarge.

Die DE-A-196 21 254 offenbart einen Scheinwerfer mit einer einen ausgeleuchteten Bereich der Projektionslinse ringförmig umgebenden, einstückigen Anformung, die dort wenigstens annähemd kegelstumpfförmig aussieht Die dortige Anformung ist lichtdurchlässig gestaltet und dient dazu, die Blendwirkung im Vergleich zu bekannten, mit einer relativ Meinen beleuchteten Fläche versehenen Scheinwerfem zu verringern, indem die beleuchtete Fläche des Scheinwerfers durch die Anformung vergrößert wird. Hierdurch wird der Scheinwerfer als weniger störend im Straßenverkehr wahrgenommen. Der dort angegebene Scheinwerfer baut ebenfalls relativ groß.DE-A-196 21 254 discloses a headlight with one illuminated Area of the projection lens ring-shaped, one-piece molding, there looks at least approximately frustoconical. The molding there is translucent designed and serves to reduce the glare compared to known ones of a relatively illuminated headlamp by the molded area increases the illuminated area of the headlamp. As a result, the headlamp is perceived as less disruptive in road traffic. The headlight specified there also builds relatively large.

Aus der EP-A-D 485 818 ist des weiteren eine Beleuchtungseinrichtung für Fahrradlichtanlagen bekannt.From EP-A-D 485 818 there is also a lighting device for bicycle lighting systems known.

Der vorliegenden Erfindung liegt somit die Aufgabe zugrunde, einen Projektionsscheinwerfer für Kraftfahrzeuge der gattungsgemäßen Art dahingehend weiterzubilden, daß der optische Eindruck des Durchmessers der Projektionslinse vergrößert und gegenüber bekannten Scheinwerfern ein deutlicher Gewinn an Bauraum erzielt wird.The present invention is therefore based on the object of a projection headlight for motor vehicles of the generic type in that the optical impression of the diameter of the projection lens is enlarged and opposite known headlights a significant gain in installation space is achieved.

Die gestellte Aufgabe ist bei einem Projektionsscheinwerfer der gattungsgemäßen Art erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöstThe task is with a projection headlamp of the generic type solved according to the invention by the characterizing features of claim 1

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den weiteren abhängigen Ansprüchen angegeben. Further advantageous refinements of the invention are dependent on the others Claims specified.

Der Kern der Erfindung besteht darin, daß die Projektionslinse auf der dem Parabolspiegel zugewandten Seite einen inneren, bestimmungsgemäß ausgeleuchteten Bereich aufweist, welcher von einer ringförmigen einstückigen Anformung umgeben ist Diese ringförmige einstückige Anformung an der Projektionslinse verlagert den eigentlichen im Kembereich ausgeleuchteten Linsenkörper deutlich über den Halterahmen hinaus nach vome. Mit anderen Worten heißt dies, daß der Halterahmen deutlich hinter dem eigentlichen Linsenkörper nach hinten versetzt ist, so daß ein erheblicher Gewinn an Bauraum entstehtThe essence of the invention is that the projection lens on the parabolic mirror facing side an inner, properly illuminated area has, which is surrounded by an annular integral molding This ring-shaped, one-piece molding on the projection lens shifts the actual one in the core area illuminated lens body clearly above the holding frame out to vome. In other words, this means that the holding frame is clearly behind the actual lens body is set back, so that a significant gain build space

Dadurch erhält die Projektionslinse eine konvexe Außenkontur, die nach außen weist, also auf der dem Parabolspiegel abgewandten Seite liegt Der durch die Konvexität der erfindungsgemäß ausgebildeten Projektionslinse gegebene Durchmesser ist größer als der besagte ausgeleuchtete Innenbereich der Linse. Das heißt, auf der konvexen Seite der Projektionslinse erscheint der Scheinwerfer größer, wobei der tatsächlich ausgeleuchtete, in diesem Falle vom Parabolspiegel direkt ausgeleuchtete Bereich kleiner ist Mit anderen Worten heißt dies, daß die Projektionslinse in ihrem Design vergrößert dargestellt ist, während dem die eigentliche direkte Ausleuchtung kleiner ist Das Parabolspiegel sowie die weiteren optischen geometrischen Abmessungen sind jedoch so bemessen, daß der nahezu gesamte Kemlichtanteil auf den besagten inneren ausgeleuchteten Bereich fällt, der im Durchmesser kleiner ist, als der Außendurchmesser der Projektionslinse. Hierbei ist die besagte ringförmige einstückige Anformung der Projektionslinse an der dem Parabolspiegel zugewandten Seite optisch dicht bearbeitetThis gives the projection lens a convex outer contour that points outwards, So on the side facing away from the parabolic mirror lies the convexity the diameter given according to the invention designed projection lens is larger than the illuminated interior of the lens. That is, on the convex The headlight appears larger on the side of the projection lens, although the headlight actually appears Illuminated area, in this case directly illuminated by the parabolic mirror In other words, this means that the projection lens is enlarged in its design is shown, during which the actual direct illumination is smaller The parabolic mirror and the other optical geometric dimensions are, however, dimensioned such that the almost entire core light portion is based on the said inner illuminated area falls, which is smaller in diameter than the outer diameter the projection lens. Here is said annular one-piece molding the projection lens on the side facing the parabolic mirror optically tightly processed

Wie im nachfolgenden Text sowie der zugehörigen Zeichnung noch ersichtlich ist, führt eine solche Ausgestaltung nicht zu einer Erhöhung des Bauraumes. Ebenso wird der eigentliche Kemausleuchtbereich der Projektionslinse nicht nachteilig beeinflußt, dennoch wird die Projektionslinse optisch d. h. designmäßig von außen vergrößertAs can be seen in the text below and the associated drawing, leads such a design does not increase the installation space. Likewise, the actual core illumination area of the projection lens is not adversely affected, nevertheless is the projection lens optically d. H. enlarged in design from the outside

In weiterer vorteilhafter Ausgestaltung der Erfindung kann alternativ dazu die besagte bearbeitete Fläche der besagten ringförmigen einstückigen Anformung Fresnell-Strukturen enthalten um eine Umfeldausleuchtung zu bewirken. In a further advantageous embodiment of the invention, the said can alternatively machined surface of said annular one-piece molding Fresnell structures included to bring about an illumination of the surroundings.

Alternativ dazu kann die besagte Fläche der besagten Anformung auch optisch dicht verchromt oder anderweitig metallisiert, oder gar geätzt sein. Im letztgenannten Fall führt dies zu einer diffusen Streuung des Restlichtes, was in der Wirkung ähnlich ist, wie eine optisch dichte Auslegung. Das gleiche gilt für die oben genannten Fresnell-Strukturen.As an alternative to this, the said surface of the said molding can also be optically sealed chrome-plated or otherwise metallized, or even etched. In the latter case this leads to a diffuse scattering of the residual light, which is similar in effect, like an optically dense design. The same applies to the Fresnell structures mentioned above.

Eine weitere Möglichkeit, die besagte ringförmige Anformung in der genannten Flächenerstreckung optisch dicht zu gestalten, ist, daß durch an dem Halterahmen angebrachte Blechverkleidungselemente die besagte optisch dichte Abdeckung erfolgt Wie oben bereits ausgeführt, wird die Linse ja von einem Rahmen der mechanisch fest auch mit den übrigen Scheinwerferkomponenten verbunden ist, gehalten. Das heißt, die Linse hat vorteilhafterweise seitliche Anformungen bzw. einen überstehenden Rand, der von Klemmelementen des besagten Halterahmens umklammert wird. Auf der gegenüberliegenden Seite im Bereich dieser Klammerelemente können dann Blechverkleidungsringe in den besagten Abmessungen ebenfalls damit verbunden angeordnet sein, die die besagte optisch dichte Abdeckung bewirken.Another possibility is the said annular formation in the area extension mentioned To make it optically tight is that by attached to the holding frame Sheet metal cladding elements, the said optically sealed cover is made as Already stated above, the lens is indeed mechanically fixed by a frame is connected to the other headlight components. That is, the The lens advantageously has lateral formations or a protruding edge, which is clasped by clamping elements of said holding frame. On the opposite Side in the area of these clamp elements can then sheet metal cladding rings also arranged in connection with said dimensions be, which cause said optically sealed cover.

Insgesamt ist die Aufgabe somit erfindungsgemäß gelöst und der Bauraum ist durch die besagte Maßnahme nicht zwangsläufig vergrößert.Overall, the object is thus achieved according to the invention and the installation space is due to the said measure is not necessarily enlarged.

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

Es zeigt

Figur 1:
Darstellung eines erfindungsgemäßen Projektionsscheinwerfers in Seitenansicht
Figur 2:
Detailabbildung des Teilkreises A.
Figur 3:
Weitere Detaildarstellung.
Figur 4:
Weitere Detaildarstellung
It shows
Figure 1:
Representation of a projection headlight according to the invention in side view
Figure 2:
Detailed illustration of sub-circle A.
Figure 3:
Further detail display.
Figure 4:
Further detail display

Figur 1 zeigt den Scheinwerfer in Seitenansicht, wobei lediglich nur die wichtigsten Komponenten dargestellt sind. Das Scheinwerfergehäuse ist hierbei nicht weiter dargestellt, sondern lediglich das nach vom abgrenzende Scheinwerferglas 10. Dahinter liegt die Projektionslinse 1, welche in einem Halterahmen 4 plaziert bzw. von demselben gehalten wird. Ebenfalls mit dem Halterahmen 4 verbunden ist das Lampenelement 6, welches in etwa in dem Fokus des Parabolspiegels 7 angeordnet ist. Die mechanisch starre Verbindung zwischen dem Halterahmen 4 und dem Parabolspiegel 7 ist hier weiter nicht dargestelltFigure 1 shows the headlight in side view, only the most important Components are shown. The headlight housing is not shown here, but only that behind the delimiting headlight glass 10 the projection lens 1, which is placed in a holding frame 4 or by the same is held. The lamp element 6 is also connected to the holding frame 4, which is roughly in the focus of the parabolic mirror 7 is arranged. The mechanically rigid connection between the holding frame 4 and the parabolic mirror 7 is also not shown here

Die Projektionslinse 1 hat dabei im Randbereich eine Anformung 2, welche ringförmig und einstückig an die Projektionslinse angeformt ist. Mit anderen Worten heißt dies, daß die Projektionslinse ohnehin einstückig ist und der Randbereich durch den entsprechenden Schliff bzw. die mechanische Bearbeitung der Projektionslinse angeformt ist. Auf der der Lampe bzw. dem Parabolspiegel 7 zugewandten Seite 3 der Projektionslinse 1 ist ein entsprechend innerer ausgeleuchteter Bereich erkennbar, der sich über die gesamte Fläche der hier eben, also plan, geschliffenen Linsenseite erstreckt Dieser plan geschliffene Bereich ist der, der von dem Lampenelement 6 über dem Parabolspiegel 7 direkt ausgeleuchtet wird. Das hier nach außen geworfene Licht ist das oben definierte Kemlicht Darüber hinaus gibt es innerhalb des Scheinwerfergehäuses auch noch Streulicht, welches im nachfolgenden Text Erwähnung findet Die erfindungsgemäß randseitig plazierte Anformung 2 der Projektionslinse ist auf der dem oben genannten inneren Bereich 3 ebenso plazierten Seite abgeschrägt. Diese Abschrägung ist jedoch nur beispielhaft, also nicht zwingend. Durch diese Abschrägung wird Streulicht aus dem eigentlichen Kemlichtkegel ausgekoppelt. Im übrigen wird damit der innere Bereich 3, welcher im wesentlichen direkt ausgeleuchtet ist, definiert Das heißt, die auf der anderen Seite der Projektionslinse 1 angeformte Konkavität erstreckt sich über den inneren Bereich 3 hinaus auch über den Bereich der Anformung 2. Nach außen, also designoptisch ist die Projektionslinse im Durchmesser größer als der eigentlich für das Kemficht ausgeleuchtete Bereich 3. Damit ist die designoptische Vergrößerung der Projektionslinse erreicht, ohne den Bauraum wesentlich zu vergrößern.The projection lens 1 has a molding 2 in the edge area, which is ring-shaped and is integrally formed on the projection lens. In other words, that the projection lens is in one piece and the edge area by the corresponding Ground or the mechanical processing of the projection lens is formed. On the side 3 of the projection lens facing the lamp or the parabolic mirror 7 1, a correspondingly illuminated interior area can be seen, which extends over the entire surface of the flat, ground, polished lens side extends here the flat ground area is that of the lamp element 6 above the parabolic mirror 7 is illuminated directly. The light thrown out here is the one above Defined core light There is also inside the headlight housing scattered light, which is mentioned in the text below Formation 2 of the projection lens placed on the edge is on the one mentioned above inner area 3 also beveled side. This bevel is however only by way of example, so not mandatory. This bevel makes stray light decoupled from the actual core light cone. Otherwise it becomes the inner one Area 3, which is essentially directly illuminated, defines that on the other side of the projection lens 1 molded concavity extends over the inner area 3 also beyond the area of the molding 2. Outwards, that is In terms of design, the projection lens is larger in diameter than that for that Kemficht illuminated area 3. This is the design-optical enlargement of the Projection lens achieved without significantly increasing the space.

Die besagte Anformung 2 kann nun gemäß den weiteren Abbildungen im einzelnen variiert ausgestaltet sein. Dieser Bereich ist daher in Figur 1 mit einem Detailkreis A gekennzeichnet Dieser Detailkreis A ist im einzelnen in den nachfolgenden Figuren dargestellt.Said formation 2 can now according to the other figures in detail be varied. This area is therefore in Figure 1 with a detail circle A. characterized This detail circle A is in detail in the following figures shown.

Figur 2 zeigt im entsprechenden Detailkreis, daß die Anformung 2 auf der entsprechend abgeschrägten Fläche mattiert, oder optisch in der oben bereits beschriebenen Weise bearbeitet ist Diese Fläche kann dabei mattiert oder auch optisch dicht abgedeckt sein, was dann in der Wirkung, nämlich das Streulicht auszukoppeln, gleich ist.Figure 2 shows in the corresponding detail circle that the molding 2 on the corresponding bevelled surface matted, or optically in the manner already described above This surface can be matted or covered optically tight, which then has the same effect, namely to decouple the scattered light.

Figur 3 zeigt eine Riffelung der besagten Fläche zur Erzeugung von Fresnell-Strukturen, die den Effekt haben auch das Streulicht, also das Licht außerhalb des Kernlichtkegels bewußt, d.h. zur Umfeldausleuchtung einzusetzen.FIG. 3 shows a corrugation of the said surface in order to produce Fresnell structures, which also have the effect of scattered light, i.e. the light outside the core light cone conscious, i.e. to use for ambient lighting.

Figur 4 zeigt eine weitere Möglichkeit, nämlich an dem Halterahmen 4 eine Blechverkleidung anzubringen, die die Projektionslinse in diesem hinteren Bereich bis zur vollen Erstreckung der Abschrägung der Anformung 2 optisch dicht bedeckt In praxi heißt dies, daß sich im Halterahmen eine Kalotte ergibt, die die erfindungsgemäß ausgestaltete Projektionslinse hintergreift und zwar soweit, daß die besagte Schräge optisch dicht abgedeckt ist.FIG. 4 shows a further possibility, namely a sheet metal cladding on the holding frame 4 to attach the projection lens in this rear area to the full Extending the bevel of the projection 2 optically tightly covered In practice means this means that there is a calotte in the holding frame, which is designed according to the invention Projection lens reaches behind and so far that the said bevel optically is tightly covered.

Eine weitere Variante kann darin bestehen, die Blechverkleidung des Halterahmens 4 auf der dem Projektionsspiegel zugewandten Seite spiegelnd zu metallisieren und derart zu formen, daß das Streulicht zurück in den nutzbaren Kemlichtkegel des Spiegels zurückzureflektieren. Dies hätte neben dem besagten Bauraumgewinn noch eine höhere Lichtausbeute zur Folge.Another variant can consist in the sheet metal cladding of the holding frame 4 to be metallized on the side facing the projection mirror and such to shape that the stray light back into the usable core light cone of the mirror reflect back. In addition to the aforementioned gain in installation space, this would have been even greater Luminous efficacy result.

Claims (6)

  1. Projection headlight for motor vehicles, having a headlight housing, in which are arranged
    a lamp element (6),
    a parabolic mirror (7),
    a projection lens (1), and
    a holding frame (4) at least for the projection lens (1),
    the projection lens (1) having on the side facing the parabolic mirror (7) an inner properly illuminated region (3) which is surrounded by an annular, unipartite integrally formed part (2) which is formed in such a way that the holding frame (4) of the projection lens (1) essentially stands back behind the inner illuminated lens body of the projection lens (1), characterized in that the integrally formed part (2) is treated in an optically tight fashion on the side facing the parabolic mirror (7) in such a way that the projection lens appears optically larger from outside, while the actual direct illumination is smaller and corresponds only to the diameter of the projection lens.
  2. Projection headlight for motor vehicles according to Claim 1, characterized in that the said treated surface of the integrally formed part (2) includes Fresnell structures.
  3. Projection headlight for motor vehicles according to Claim 1 or 2, characterized in that the said treated surface of the integrally formed part (2) is chromium-plated or otherwise metalized.
  4. Projection headlight for motor vehicles according to one of the preceding claims, characterized in that the said treated surface of the integrally formed part (2) is etched.
  5. Projection headlight for motor vehicles according to one of the preceding claims, characterized in that the said treated surface of the integrally formed part (2) is covered in an optically tight fashion by a sheet-metal cladding fitted on the holding frame (4).
  6. Projection headlight for motor vehicles according to Claim 5, characterized in that the sheet-metal cladding of the holding frame (4) on the side facing the parabolic mirror (7) is aligned and specularly metalized in such a way that scattered light is retroreflected into the useful core light cone of the reflection element (7).
EP99931053A 1998-07-01 1999-06-11 Projecting headlight for motor vehicles Expired - Lifetime EP1092111B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19829345 1998-07-01
DE19829345A DE19829345B4 (en) 1998-07-01 1998-07-01 Projection headlights for motor vehicles
PCT/EP1999/004019 WO2000001983A1 (en) 1998-07-01 1999-06-11 Projecting headlight for motor vehicles

Publications (2)

Publication Number Publication Date
EP1092111A1 EP1092111A1 (en) 2001-04-18
EP1092111B1 true EP1092111B1 (en) 2004-09-08

Family

ID=7872598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99931053A Expired - Lifetime EP1092111B1 (en) 1998-07-01 1999-06-11 Projecting headlight for motor vehicles

Country Status (4)

Country Link
EP (1) EP1092111B1 (en)
JP (1) JP2002519839A (en)
DE (2) DE19829345B4 (en)
WO (1) WO2000001983A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004011090B4 (en) * 2004-03-06 2007-01-04 Daimlerchrysler Ag Headlights for vehicles
FR3005343A1 (en) * 2013-05-06 2014-11-07 Valeo Vision LIGHTING DEVICE AND CORRESPONDING LENS FOR MOTOR VEHICLE
JP6830850B2 (en) * 2017-04-14 2021-02-17 株式会社小糸製作所 Vehicle lighting

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550847B1 (en) * 1983-08-18 1988-07-01 Cibie Projecteurs ELLIPTICAL REFLECTOR WITH CUT BEAM FOR MOTOR VEHICLE
DE3516813A1 (en) * 1985-05-10 1986-11-13 Hella KG Hueck & Co, 4780 Lippstadt Dimmed vehicle headlights
AT398337B (en) * 1988-04-27 1994-11-25 Zizala Lichtsysteme Gmbh Vehicle headlight (headlamp)
DE3827594A1 (en) * 1988-08-13 1990-02-15 Hella Kg Hueck & Co METHOD FOR PRODUCING AND MANUFACTURED FRAME FOR A VEHICLE HEADLAMP USING THE PROJECTION METHOD
DE4305633A1 (en) * 1992-02-24 1993-10-07 Valeo Vision Headlamp with two-part lens holder esp for motor vehicle - has relative positions of lens and reflector fixed by heat-dissipating assembly which grips lens between coaxial collars
DE19655357B4 (en) * 1996-05-25 2009-01-15 Automotive Lighting Reutlingen Gmbh Vehicle headlights

Also Published As

Publication number Publication date
JP2002519839A (en) 2002-07-02
WO2000001983A1 (en) 2000-01-13
EP1092111A1 (en) 2001-04-18
DE19829345B4 (en) 2009-11-26
DE19829345A1 (en) 2000-01-13
DE59910463D1 (en) 2004-10-14

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