EP1637801A2 - Lighting device for vehicle and fastening method - Google Patents

Lighting device for vehicle and fastening method Download PDF

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Publication number
EP1637801A2
EP1637801A2 EP05017295A EP05017295A EP1637801A2 EP 1637801 A2 EP1637801 A2 EP 1637801A2 EP 05017295 A EP05017295 A EP 05017295A EP 05017295 A EP05017295 A EP 05017295A EP 1637801 A2 EP1637801 A2 EP 1637801A2
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EP
European Patent Office
Prior art keywords
housing
lens
lighting device
flat
adhesive
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.)
Granted
Application number
EP05017295A
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German (de)
French (fr)
Other versions
EP1637801B1 (en
EP1637801A3 (en
Inventor
Jan Dipl.-Ing. Formanek
Thomas Dipl.-Ing. Hilsenbeck
Jiri Dipl.-Ing. Cernoch
Karsten Dipl.-Ing. Diekmann
Frank Dr. Ing. Merkelbach
Horst Wicker
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.)
Hella Autotechnik sro
Hella GmbH and Co KGaA
Original Assignee
Hella Autotechnik sro
Hella KGaA Huek and Co
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.)
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Publication of EP1637801A2 publication Critical patent/EP1637801A2/en
Publication of EP1637801A3 publication Critical patent/EP1637801A3/en
Application granted granted Critical
Publication of EP1637801B1 publication Critical patent/EP1637801B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof

Definitions

  • the invention relates to a lighting device for motor vehicles with a light components bearing housing consisting of a plastic material, wherein the housing is connected at a front peripheral edge by gluing to a limited by the peripheral edge opening of the housing lens glass material.
  • the invention relates to a method for attaching a lens to a housing of a lighting device for motor vehicles, wherein the lens is peripherally connected to the housing.
  • a lighting device for motor vehicles is known from EP 0 589 189 B1, wherein light components, such as a reflector and a light source, are accommodated in a cup-shaped housing.
  • a front peripheral edge of the housing has a receiving groove, in which a foot of a transparent lens used and is mechanically connected by means of a laterally attached retaining clip.
  • the lens covers the limited by the peripheral edge opening of the housing completely.
  • protruding elevations are provided so that the lens is centered in the housing transversely to its Aufsetzraum.
  • a lighting device for motor vehicles with a light components, such as light source and reflector, supporting housing in which a permanently elastic sealing means is used at a front peripheral edge of the housing in a receiving groove, which serves as an adhesive bed for a projecting web a transparent lens is used.
  • the thickly introduced into the receiving groove sealant has only a limited adhesive effect; It primarily serves to seal between housing and lens.
  • To generate a required holding force of the peripheral edge of the housing is provided with a latching nose which engages behind the edge of the lens.
  • the lenses are usually formed from a pressed glass, which have relatively large manufacturing tolerances.
  • Object of the present invention is to provide a lighting device for motor vehicles and a method for attaching a lens to a housing of a lighting device, so that in a cost effective manner a secure and permanent attachment between a lens and a housing is guaranteed.
  • the lighting device in conjunction with the preamble of claim 1, characterized in that the lens has a flat edge surface, which by means of a curable and thermally elastic adhesive to form a flat adhesive strip is connected to a flat mounting surface of the housing.
  • the lens made of a thermoformed flat glass is fixed to a front edge of the housing by means of a curable adhesive only.
  • the adhesive surfaces of the light disk on the one hand and the housing on the other hand are flat and / or flat, with a flat adhesive strip extending between them.
  • the invention makes it possible that an otherwise conventional adhesive bed, which is fitted in a groove, is not required.
  • the edge region of the lens and the housing can thus be designed inexpensively.
  • a thermally elastic adhesive a long-term stable and intimate adhesive bond between the adhesive surfaces of the housing on the one hand and the lens on the other hand can be generated.
  • the thermally elastic adhesive is able to compensate for the different dimensions of the lens and the housing due to thermal stress.
  • the different thermal expansion coefficients are compensated for temperature changes due to the elasticity of the adhesive.
  • the flat edge surface of the lens and the planar mounting surface of the housing are arranged parallel to each other, wherein the adhesive layer running between them allows a permanent and secure connection.
  • the invention extends transversely to the adhesive layer or to the adhesive strip of the lens or the housing a spacer, which dictates the thickness of the adhesive strip.
  • the height of the spacer or the thickness of the adhesive strip depends on the choice of material of the lens and the housing. With increasing absolute difference between the coefficient of thermal expansion of the lens on the one hand and the housing on the other hand, the height of the spacer increases.
  • the flat edge surface of the lens which is acted upon by the adhesive layer, is continuous in a central main surface of the lens, so that the edge of the lens is free of unwanted protruding ridges.
  • the lens is made of a thermoformed flat glass, wherein a desired curvature of the lens is achieved by heating the glass material and taking advantage of its own weight in the deformation process.
  • the adhesive is formed as a moisture-curable one-component polyurethane adhesive, which is able to absorb material expansions of the component surfaces to be fastened in the event of temperature fluctuations.
  • the housing is preferably made of a thermosetting plastic material whose coefficient of thermal expansion differs only to a limited extent from the thermal expansion coefficient of the glass of the lens.
  • the housing is made of an LPP plastic material (UP-GF, BMC) or a polybuthylene terephtalate (PBT).
  • the lens has a laminating layer in a fastening region, so that an optical covering of the adhesive bond is provided.
  • the invention in conjunction with the preamble of claim 9, characterized in that in a front edge region of the housing on a flat mounting surface of the same a thermally elastic adhesive layer is applied, that the lens with a flat edge surface thereof to form a predetermined distance is applied to the planar mounting surface of the housing to the adhesive layer is held us in this position until the adhesive layer has cured.
  • the particular advantage of the method according to the invention is that only a single attachment step is required to form a thermally elastic adhesive layer between a planar mounting surface of the housing and a flat edge surface of the lens to connect the lens to the housing. As a result, sufficient tightness and strength can be achieved in a single step. An additional fixation by means of retaining clips is not required.
  • the lens is subjected to a hardening process before the fastening process.
  • the curing can be carried out thermally, chemically or by hut smoking, so that a sufficient thermal shock resistance is given for the lighting device.
  • a lighting device 1 according to the invention for motor vehicles is used in particular as a headlight for commercial vehicles, in which, according to FIG. 1, several light functions are integrated.
  • the lighting device 1 has four arranged in a row in the horizontal direction chambers 2, each forming light units to form different light functions. For example, a first lighting unit 3 for generating an additional high-beam function, a second lighting unit 4 for generating a fog light function, a third lighting unit 5 for generating a low beam function and a fourth lighting unit 6 for generating a static cornering light function or a position light function.
  • a first lighting unit 3 for generating an additional high-beam function
  • a second lighting unit 4 for generating a fog light function
  • a third lighting unit 5 for generating a low beam function
  • a fourth lighting unit 6 for generating a static cornering light function or a position light function.
  • the lighting units 3, 4, 5, 6 each have light sources 7 and reflectors 8, which are each enclosed in one of the respective lighting unit 3, 4, 5, 6 associated lighting unit housing 9, 10, 11.
  • the light sources 7 and the reflectors 8 form light components for generating a predetermined light distribution and are supported by the respective lighting unit housing 9, 10, 11.
  • the light unit housing 9, 10, 11 of the light units 3, 4, 5, 6 is preceded by a common frame 13, wherein between the light unit housings 9, 10, 11, an adapter 14 is provided for adjusting the front opening edge 15 of the light unit Housing 9, 10, 11 to a rear opening edge 16 of the frame 13.
  • the light units 3, 4, 5 is associated with an adapter 14, wherein the adapter 14 on at one of the opening edge 15 of the light unit housing 9, 10, 11 facing the end As well as the opening edge 16 of the frame 13 further end has a receiving groove 17 into which a fastening web 18 of the respective light unit housing 9, 10, 11 and the window frame 13 engages.
  • the circumferential receiving channel 17 has an adhesive bed 12 with a silicone material, so that in a known manner, a bond between the frame 13 and the adapter 14 on the one hand and the light unit housings 9, 10, 11 is given to the adapter 14 on the other.
  • the flat mounting surface 23 of the frame 13 is flush with the flat edge surface 22 of the lens 21 and extends to the same in parallel direction.
  • an adhesive layer 24 (sheet-like adhesive strip) is provided which extends between the flat edge surface at the edge 22 of the lens 21 and the mounting surface 23 of the frame 13 extends with a constant thickness.
  • the adhesive layer 24 is formed by a thermally elastic adhesive, preferably a one-component polyurethane adhesive. The adhesive 24 is formed so thick that expansions of the lens 21 and the frame 13 are compensated as a result of thermal stress.
  • a spacer 25 is provided, which is formed as a circumferential spacer rib or as a plurality of spaced edge arranged spaced cam, which protrude from the mounting surface 23 of the frame 13 and are integrally formed thereon.
  • the spacer 25 prevents over-swelling of the adhesive 24 in a decorative region of the lens 21, which is formed by a central major surface 26. From the central main surface 26 extends continuously the peripheral edge surface 22 which extends between a peripheral edge 27 of the lens 21 and a line along which the spacer 25 extends.
  • the height of the spacer 25 may be in a range of 2 mm to 8 mm.
  • the flat edge surface 22 of the lens 21 is provided with a laminating layer 28 applied by a screen printing process. It allows a cover of the adhesive bond 24 and has a predetermined color, such as silver on.
  • the adhesive layer 24 forms an adhesive strip which extends in a width of a few millimeters edge of the housing 19 and the lens 21 and of the Edge edge 27 and the spacer 25 is laterally limited.
  • the lens 21 is formed of a thermoformed flat glass.
  • the flat glass can be produced for example by means of a floating process (float process).
  • float process float process
  • the flat flat glass blank is heated, wherein the deformation is formed due to the weight of the flat glass part with the aid of suitable investment tools.
  • the finished fitting is subsequently heated to the extent that it does not lose its shape. There is a slow cooling of the fitting, occur in which less stress in the glass. By this hardening process, a thermal shock resistance .DELTA.T of greater than 110 Kelvin can be generated.
  • the laminating layer 28 is optionally applied on the inner flat edge surfaces 22 of the light disk 21 (in the fastening region) by means of a screen printing process.
  • a moisture-curable one-component polyurethane adhesive is applied to the planar mounting surface 23.
  • the spacer 25 prevents application of the adhesive layer 24 in the region of the central main surface 26 of the lens 21.
  • the lens 21 is applied by abutment of the flat edge surface 22 to the spacer 25 to the front edge 23 of the housing 19 and held in this position for so long until the adhesive layer 24 is cured.
  • the fastening process is now complete.
  • the housing 19, in particular the frame 13, is made of a thermosetting or thermoplastic plastic material.
  • the thermoset material may be formed as LPP (UP-GF, BMC) and the thermoplastic material as PBT (Polybuthylene terephthalate).
  • the laminating layer 28 is preferably applied to the lens 21 only when the lens 21 forms a gap to an edge of the body opening in the mounted state of the lighting device 1 within a body opening. If the edge of the body opening covers the adhesive strip, the laminating layer 28 can be dispensed with.
  • the lens 21 may also be directly connected to a front edge of the light unit housing 9, 10, 11.
  • This embodiment is suitable for applications in which a frame 13 or an adapter 14 can be dispensed with.

Abstract

A light unit for a motor vehicle comprises a light carrier plastic housing (13) with a periphery glued to a glass light cover disc (21) with a planar edge surface (22) by means of a hardenable thermoelastic adhesive in strip form (24) : An independent claim is also included for a process for attaching the light disc to the housing.

Description

Die Erfindung betrifft eine Leuchtvorrichtung für Kraftfahrzeuge mit einem Lichtkomponenten tragenden Gehäuse bestehend aus einem Kunststoffmaterial, wobei das Gehäuse an einem vorderen Umfangsrand durch Verklebung mit einer die durch den Umfangsrand begrenzten Öffnung des Gehäuses abdeckenden Lichtscheibe aus Glasmaterial verbunden ist.The invention relates to a lighting device for motor vehicles with a light components bearing housing consisting of a plastic material, wherein the housing is connected at a front peripheral edge by gluing to a limited by the peripheral edge opening of the housing lens glass material.

Ferner betrifft die Erfindung ein Verfahren zum Befestigen einer Lichtscheibe an ein Gehäuse einer Leuchtvorrichtung für Kraftfahrzeuge, wobei die Lichtscheibe randseitig mit dem Gehäuse verbunden wird.Furthermore, the invention relates to a method for attaching a lens to a housing of a lighting device for motor vehicles, wherein the lens is peripherally connected to the housing.

Aus der EP 0 589 189 B1 ist eine Leuchtvorrichtung für Kraftfahrzeuge bekannt, wobei in einem topfförmigen Gehäuse Lichtkomponenten, wie zum Beispiel ein Reflektor sowie eine Lichtquelle, untergebracht sind. Ein vorderer Umfangsrand des Gehäuses weist eine Aufnahmenut auf, in die ein Fuß einer transparenten Lichtscheibe eingesetzt und mittels einer seitlich aufgesetzten Halteklammer mechanisch verbunden wird. Die Lichtscheibe deckt die durch den Umfangsrand begrenzte Öffnung des Gehäuses vollständig ab. In der Aufnahmenut des Gehäusevorderrandes sind hervorspringende Erhöhungen vorgesehen, so dass die Lichtscheibe im Gehäuse quer zu ihrer Aufsetzrichtung zentriert ist.A lighting device for motor vehicles is known from EP 0 589 189 B1, wherein light components, such as a reflector and a light source, are accommodated in a cup-shaped housing. A front peripheral edge of the housing has a receiving groove, in which a foot of a transparent lens used and is mechanically connected by means of a laterally attached retaining clip. The lens covers the limited by the peripheral edge opening of the housing completely. In the receiving groove of the housing front edge protruding elevations are provided so that the lens is centered in the housing transversely to its Aufsetzrichtung.

Aus der DE 28 46 990 A1 ist eine Leuchtvorrichtung für Kraftfahrzeuge mit einen Lichtkomponenten, wie Lichtquelle und Reflektor, tragenden Gehäuse bekannt, bei dem an einen vorderen Umfangsrand des Gehäuses in einer Aufnahmenut ein dauerelastisches Dichtungsmittel eingesetzt ist, das als ein Klebebett für einen abragenden Steg einer transparenten Lichtscheibe dient. Das dickflüssig in die Aufnahmenut eingebrachte Dichtungsmittel hat nur eine begrenzte Klebewirkung; es dient in erster Linie der Abdichtung zwischen Gehäuse und Lichtscheibe. Zur Erzeugung einer erforderlichen Haltekraft ist der Umfangsrand des Gehäuses mit einer Rastnase versehen, die den Rand der Lichtscheibe hintergreift. Die Lichtscheiben sind üblicherweise aus einem Pressglas gebildet, die relativ große Fertigungstoleranzen aufweisen.From DE 28 46 990 A1 discloses a lighting device for motor vehicles with a light components, such as light source and reflector, supporting housing is known in which a permanently elastic sealing means is used at a front peripheral edge of the housing in a receiving groove, which serves as an adhesive bed for a projecting web a transparent lens is used. The thickly introduced into the receiving groove sealant has only a limited adhesive effect; It primarily serves to seal between housing and lens. To generate a required holding force of the peripheral edge of the housing is provided with a latching nose which engages behind the edge of the lens. The lenses are usually formed from a pressed glass, which have relatively large manufacturing tolerances.

Aufgabe der vorliegenden Erfindung ist es, eine Leuchtvorrichtung zur Kraftfahrzeuge sowie ein Verfahren zum Befestigen einer Lichtscheibe an einem Gehäuse einer Leuchtvorrichtung anzugeben, so dass auf kostengünstige Art und Weise eine sichere und dauerhafte Befestigung zwischen einer Lichtscheibe und einem Gehäuse gewährleistet ist.Object of the present invention is to provide a lighting device for motor vehicles and a method for attaching a lens to a housing of a lighting device, so that in a cost effective manner a secure and permanent attachment between a lens and a housing is guaranteed.

Zur Lösung dieser Aufgabe ist die erfindungsgemäße Leuchtvorrichtung in Verbindung mit dem Oberbegriff des Patentanspruchs 1 dadurch gekennzeichnet, dass die Lichtscheibe eine ebene Randfläche aufweist, die mittels eines aushärtbaren und thermisch elastischen Klebstoffs unter Ausbildung eines flächigen Klebestreifens mit einer ebenen Befestigungsfläche des Gehäuses verbunden ist.To solve this problem, the lighting device according to the invention in conjunction with the preamble of claim 1, characterized in that the lens has a flat edge surface, which by means of a curable and thermally elastic adhesive to form a flat adhesive strip is connected to a flat mounting surface of the housing.

Nach der Erfindung wird die aus einem warmgeformten Flachglas bestehende Lichtscheibe lediglich mittels eines aushärtbaren Klebstoffs an einem Vorderrand des Gehäuses befestigt. Erfindungsgemäß sind die Klebeflächen der Lichtscheibe einerseits und des Gehäuses andererseits flächig und/oder eben ausgebildet, wobei sich zwischen denselben ein flächiger Klebestreifen erstreckt. Vorteilhaft ermöglicht die Erfindung, dass ein ansonsten übliches Klebebett, das in einer Nut eingepasst ist, nicht erforderlich ist. Der Randbereich der Lichtscheibe und des Gehäuses kann somit kostengünstig gestaltet werden. Durch die Verwendung eines thermisch elastischen Klebstoffs kann eine langzeitstabile und innige Klebeverbindung zwischen den Klebeflächen des Gehäuses einerseits und der Lichtscheibe andererseits erzeugt werden. Der thermisch elastische Klebstoff ist in der Lage, die unterschiedlichen Ausdehnungen der Lichtscheibe und des Gehäuses infolge einer thermischen Belastung auszugleichen. Die unterschiedlichen Wärmeausdehnungskoeffizienten werden bei Temperaturänderungen infolge der Elastizität des Klebstoffs ausgeglichen.According to the invention, the lens made of a thermoformed flat glass is fixed to a front edge of the housing by means of a curable adhesive only. According to the invention, the adhesive surfaces of the light disk on the one hand and the housing on the other hand are flat and / or flat, with a flat adhesive strip extending between them. Advantageously, the invention makes it possible that an otherwise conventional adhesive bed, which is fitted in a groove, is not required. The edge region of the lens and the housing can thus be designed inexpensively. By using a thermally elastic adhesive, a long-term stable and intimate adhesive bond between the adhesive surfaces of the housing on the one hand and the lens on the other hand can be generated. The thermally elastic adhesive is able to compensate for the different dimensions of the lens and the housing due to thermal stress. The different thermal expansion coefficients are compensated for temperature changes due to the elasticity of the adhesive.

Nach einer besonderen Ausführungsform der Erfindung sind die ebene Randfläche der Lichtscheibe und die ebene Befestigungsfläche des Gehäuses parallel zueinander angeordnet, wobei die zwischen denselben verlaufende Klebeschicht eine dauerhafte und sichere Verbindung ermöglicht.According to a particular embodiment of the invention, the flat edge surface of the lens and the planar mounting surface of the housing are arranged parallel to each other, wherein the adhesive layer running between them allows a permanent and secure connection.

Nach einer Weiterbildung der Erfindung erstreckt sich quer zur Klebeschicht bzw. zu dem Klebestreifen von der Lichtscheibe oder dem Gehäuse ein Abstandshalter, der die Dicke des Klebestreifens vorgibt. Die Höhe des Abstandshalters bzw. die Dicke des Klebestreifens ist abhängig von der Materialwahl der Lichtscheibe und des Gehäuses. Mit zunehmender betragsmäßiger Differenz zwischen dem Wärmeausdehnungskoeffizienten der Lichtscheibe einerseits und des Gehäuses andererseits nimmt die Höhe des Abstandshalters zu.According to a development of the invention extends transversely to the adhesive layer or to the adhesive strip of the lens or the housing a spacer, which dictates the thickness of the adhesive strip. The height of the spacer or the thickness of the adhesive strip depends on the choice of material of the lens and the housing. With increasing absolute difference between the coefficient of thermal expansion of the lens on the one hand and the housing on the other hand, the height of the spacer increases.

Nach einer Weiterbildung der Erfindung geht die ebene Randfläche der Lichtscheibe, die mit der Klebeschicht beaufschlagt ist, stetig in eine mittlere Hauptfläche der Lichtscheibe über, so dass auch der Rand der Lichtscheibe frei von unerwünschten abragenden Stegen ist. Vorzugsweise ist die Lichtscheibe aus einem warmgeformten Flachglas hergestellt, wobei eine gewünschte Wölbung der Lichtscheibe durch Erwärmung des Glasmaterials und Ausnutzung des Eigengewichts desselben bei dem Verformvorgang erzielt wird.According to a development of the invention, the flat edge surface of the lens, which is acted upon by the adhesive layer, is continuous in a central main surface of the lens, so that the edge of the lens is free of unwanted protruding ridges. Preferably, the lens is made of a thermoformed flat glass, wherein a desired curvature of the lens is achieved by heating the glass material and taking advantage of its own weight in the deformation process.

Nach einer bevorzugten Ausführungsform der Erfindung ist der Klebstoff als ein durch Feuchtigkeit aushärtbarer Einkomponenten-Polyurethan-Klebstoff ausgebildet, der in der Lage ist, Materialausdehnungen der zu befestigenden Bauteileflächen bei Temperaturschwankungen aufzunehmen.According to a preferred embodiment of the invention, the adhesive is formed as a moisture-curable one-component polyurethane adhesive, which is able to absorb material expansions of the component surfaces to be fastened in the event of temperature fluctuations.

Nach einer Weiterbildung der Erfindung ist das Gehäuse vorzugsweise aus einem Duroplast-Kunststoffmaterial hergestellt, dessen Wärmeausdehnungskoeffizient sich nur begrenzt von dem Wärmeausdehnungskoeffizienten des Glases der Lichtscheibe unterscheidet. Vorzugsweise ist das Gehäuse aus einem LPP-Kunststoffmaterial (UP-GF, BMC) oder aus einem Polybuthylenterephtalat (PBT).According to a development of the invention, the housing is preferably made of a thermosetting plastic material whose coefficient of thermal expansion differs only to a limited extent from the thermal expansion coefficient of the glass of the lens. Preferably, the housing is made of an LPP plastic material (UP-GF, BMC) or a polybuthylene terephtalate (PBT).

Nach einer Weiterbildung der Erfindung weist die Lichtscheibe in einem Befestigungsbereich eine Kaschierschicht auf, so dass eine optische Abdeckung der Klebeverbindung gegeben ist.According to a development of the invention, the lens has a laminating layer in a fastening region, so that an optical covering of the adhesive bond is provided.

Zur Lösung der Aufgabe ist die Erfindung in Verbindung mit dem Oberbegriff des Patentanspruchs 9 dadurch gekennzeichnet, dass in einem vorderen Randbereich des Gehäuses auf eine ebene Befestigungsfläche desselben eine thermisch elastische Klebstoffschicht aufgetragen wird, dass die Lichtscheibe mit einer ebenen Randfläche derselben unter Bildung eines vorgegebenen Abstands zu der ebenen Befestigungsfläche des Gehäuses an die Klebstoffschicht angelegt wird uns so lange in dieser Position gehalten wird, bis die Klebstoffschicht ausgehärtet ist.To solve the problem, the invention in conjunction with the preamble of claim 9, characterized in that in a front edge region of the housing on a flat mounting surface of the same a thermally elastic adhesive layer is applied, that the lens with a flat edge surface thereof to form a predetermined distance is applied to the planar mounting surface of the housing to the adhesive layer is held us in this position until the adhesive layer has cured.

Der besondere Vorteil des erfindungsgemäßen Verfahrens besteht darin, dass lediglich ein einziger Befestigungsschritt unter Bildung einer thermisch elastischen Klebstoffschicht zwischen einer ebenen Befestigungsfläche des Gehäuses und einer ebenen Randfläche der Lichtscheibe erforderlich ist, um die Lichtscheibe mit dem Gehäuse zu verbinden. Hierdurch kann in einem einzigen Arbeitsschritt eine ausreichende Dichtigkeit und Festigkeit erzielt werden. Eine zusätzliche Fixierung mittels Halteklammern ist nicht erforderlich.The particular advantage of the method according to the invention is that only a single attachment step is required to form a thermally elastic adhesive layer between a planar mounting surface of the housing and a flat edge surface of the lens to connect the lens to the housing. As a result, sufficient tightness and strength can be achieved in a single step. An additional fixation by means of retaining clips is not required.

Nach einer Weiterbildung des erfindungsgemäßen Verfahrens wird die Lichtscheibe vor dem Befestigungsvorgang einem Härtungsvorgang unterzogen. Die Härtung kann thermisch, chemisch oder durch Hüttenräuchern erfolgen, so dass eine ausreichende Temperaturschockbeständigkeit für die Leuchtvorrichtung gegeben ist.According to a development of the method according to the invention, the lens is subjected to a hardening process before the fastening process. The curing can be carried out thermally, chemically or by hut smoking, so that a sufficient thermal shock resistance is given for the lighting device.

Ein Ausführungsbeispiel der Erfindung wird nachfolgen anhand der Zeichnungen näher erläutert.An embodiment of the invention will be explained below with reference to the drawings.

Es zeigen:

Figur 1
einen Horizontalschnitt durch eine erfindungsgemäße Leuchtvorrichtung und
Figur 2
einen Vertikalschnitt durch eine Leuchteinheit entlang der Schnittlinie A in Figur 1
Show it:
FIG. 1
a horizontal section through a lighting device according to the invention and
FIG. 2
a vertical section through a lighting unit along the section line A in Figure 1

Eine erfindungsgemäße Leuchtvorrichtung 1 für Kraftfahrzeuge wird insbesondere als Scheinwerfer für Nutzkraftfahrzeuge eingesetzt, in dem gemäß Figur 1 mehrere Lichtfunktionen integriert sind.A lighting device 1 according to the invention for motor vehicles is used in particular as a headlight for commercial vehicles, in which, according to FIG. 1, several light functions are integrated.

Die Leuchtvorrichtung 1 weist vier in horizontaler Richtung reihenförmig angeordnete Kammern 2 auf, die jeweils Leuchteinheiten zur Bildung unterschiedlicher Lichtfunktionen bilden. Beispielsweise kann eine erste Leuchteinheit 3 zur Erzeugung einer Zusatzfernlichtfunktion, eine zweite Leuchteinheit 4 zur Erzeugung einer Nebellichtfunktion, eine dritte Leuchteinheit 5 zur Erzeugung einer Abblendlichtfunktion und eine vierte Leuchteinheit 6 zur Erzeugung einer statischen Kurvenlichtfunktion bzw. einer Positionslichtfunktion dienen.The lighting device 1 has four arranged in a row in the horizontal direction chambers 2, each forming light units to form different light functions. For example, a first lighting unit 3 for generating an additional high-beam function, a second lighting unit 4 for generating a fog light function, a third lighting unit 5 for generating a low beam function and a fourth lighting unit 6 for generating a static cornering light function or a position light function.

Hierzu weisen die Leuchteinheiten 3, 4, 5, 6 jeweils Lichtquellen 7 sowie Reflektoren 8 auf, die jeweils in einem der jeweiligen Leuchteinheit 3, 4, 5, 6 zugeordneten Leuchteinheit-Gehäuse 9, 10, 11 eingefasst sind.For this purpose, the lighting units 3, 4, 5, 6 each have light sources 7 and reflectors 8, which are each enclosed in one of the respective lighting unit 3, 4, 5, 6 associated lighting unit housing 9, 10, 11.

Die Lichtquellen 7 und die Reflektoren 8 bilden Lichtkomponenten zur Erzeugung einer vorgegebenen Lichtverteilung und werden durch das jeweilige Leuchteinheit-Gehäuse 9, 10, 11 getragen. Dem Leuchteinheit-Gehäuse 9, 10, 11 der Leuchteinheiten 3, 4, 5, 6 ist ein gemeinsamer Blendrahmen 13 vorgelagert, wobei zwischen den Leuchteinheit-Gehäusen 9, 10, 11 ein Adapter 14 vorgesehen ist zur Anpassung des vorderen Öffnungsrandes 15 des Leuchteinheit-Gehäuses 9, 10, 11 an einen hinteren Öffnungsrand 16 des Blendrahmens 13. Den Leuchteinheiten 3, 4, 5 ist jeweils ein Adapter 14 zugeordnet, wobei der Adapter 14 auf an einem dem Öffnungsrand 15 des Leuchteinheit-Gehäuses 9, 10, 11 zugewandten Ende sowie dem Öffnungsrand 16 des Blendrahmens 13 zugewandten weiteren Ende eine Aufnahmerinne 17 aufweist, in die ein Befestigungssteg 18 des jeweiligen Leuchteinheit-Gehäuses 9, 10, 11 bzw. des Blendrahmens 13 eingreift. Die umlaufende Aufnahmerinne 17 weist ein Klebebett 12 mit einem Silikonmaterial auf, so dass in bekannter Weise eine Verklebung zwischen dem Blendrahmen 13 und dem Adapter 14 einerseits und den Leuchteinheit-Gehäusen 9, 10, 11 mit dem Adapter 14 andererseits gegeben ist.The light sources 7 and the reflectors 8 form light components for generating a predetermined light distribution and are supported by the respective lighting unit housing 9, 10, 11. The light unit housing 9, 10, 11 of the light units 3, 4, 5, 6 is preceded by a common frame 13, wherein between the light unit housings 9, 10, 11, an adapter 14 is provided for adjusting the front opening edge 15 of the light unit Housing 9, 10, 11 to a rear opening edge 16 of the frame 13. The light units 3, 4, 5 is associated with an adapter 14, wherein the adapter 14 on at one of the opening edge 15 of the light unit housing 9, 10, 11 facing the end As well as the opening edge 16 of the frame 13 further end has a receiving groove 17 into which a fastening web 18 of the respective light unit housing 9, 10, 11 and the window frame 13 engages. The circumferential receiving channel 17 has an adhesive bed 12 with a silicone material, so that in a known manner, a bond between the frame 13 and the adapter 14 on the one hand and the light unit housings 9, 10, 11 is given to the adapter 14 on the other.

Die Leuchteinheit-Gehäuse 9, 10, 11 bilden zusammen mit den jeweils zugeordneten Adaptern 14 sowie dem Blendrahmen 13 ein Gehäuse 19 der Leuchtvorrichtung 1, das an einem vorderen Umfangsrand 20 mit einer die durch den Umfangsrand 20 begrenzte Öffnung des Gehäuses 19 abdeckenden Lichtscheibe 21 durch Verklebung verbunden ist. Als Klebefläche dienen zum einen eine ebene Randfläche 22 der Lichtscheibe 21 sowie eine ebene Befestigungsfläche 23 des Gehäuses 19 bzw. des Blendrahmens 13. Die ebene Befestigungsfläche 23 des Blendrahmens 13 schließt bündig mit der ebenen Randfläche 22 der Lichtscheibe 21 ab und erstreckt sich zu derselben in paralleler Richtung. Zur klebenden Haftung ist eine Klebeschicht 24 (flächiger Klebestreifen) vorgesehen, der sich randseitig zwischen der ebenen Randfläche 22 der Lichtscheibe 21 und der Befestigungsfläche 23 des Blendrahmens 13 mit konstanter Dicke erstreckt. Die Klebeschicht 24 wird durch einen thermisch elastischen Klebstoff, vorzugsweise einen Einkomponenten-Polyurethan-Klebstoff, gebildet. Der Klebstoff 24 ist derart dick ausgebildet, dass Ausdehnungen der Lichtscheibe 21 bzw. des Blendrahmens 13 infolge thermischer Belastung ausgeglichen werden.The light unit housing 9, 10, 11 together with the respectively associated adapters 14 and the frame 13, a housing 19 of the lighting device 1, which at a front peripheral edge 20 with a limited by the peripheral edge 20 opening of the housing 19 covering the light disk 21 Bonding is connected. The flat mounting surface 23 of the frame 13 is flush with the flat edge surface 22 of the lens 21 and extends to the same in parallel direction. For adhesive adhesion, an adhesive layer 24 (sheet-like adhesive strip) is provided which extends between the flat edge surface at the edge 22 of the lens 21 and the mounting surface 23 of the frame 13 extends with a constant thickness. The adhesive layer 24 is formed by a thermally elastic adhesive, preferably a one-component polyurethane adhesive. The adhesive 24 is formed so thick that expansions of the lens 21 and the frame 13 are compensated as a result of thermal stress.

Zur Vorgabe der Dicke der Klebeschicht 24 ist ein Abstandshalter 25 vorgesehen, der sich als umlaufende Abstandsrippe oder als eine Mehrzahl von randseitig verteilt angeordneten Abstandsnocken ausgebildet ist, die von der Befestigungsfläche 23 des Blendrahmens 13 abragen und an demselben angeformt sind. Darüber hinaus verhindert der Abstandshalter 25 ein Überquellen des Klebstoffs 24 in einen dekorativen Bereich der Lichtscheibe 21, der durch eine mittlere Hauptfläche 26 gebildet wird. Von der mittleren Hauptfläche 26 erstreckt sich stetig die umlaufende Randfläche 22, die sich zwischen einer Randkante 27 der Lichtscheibe 21 und einer Linie erstreckt, entlang der der Abstandshalter 25 verläuft. Die Höhe des Abstandshalters 25 kann in einem Bereich von 2 mm bis 8 mm liegen.To specify the thickness of the adhesive layer 24, a spacer 25 is provided, which is formed as a circumferential spacer rib or as a plurality of spaced edge arranged spaced cam, which protrude from the mounting surface 23 of the frame 13 and are integrally formed thereon. In addition, the spacer 25 prevents over-swelling of the adhesive 24 in a decorative region of the lens 21, which is formed by a central major surface 26. From the central main surface 26 extends continuously the peripheral edge surface 22 which extends between a peripheral edge 27 of the lens 21 and a line along which the spacer 25 extends. The height of the spacer 25 may be in a range of 2 mm to 8 mm.

Damit die Klebeschicht 25 von außen nicht sichtbar ist, ist die ebene Randfläche 22 der Lichtscheibe 21 mit einer durch ein Siebdruckverfahren aufgebrachten Kaschierschicht 28 versehen. Sie ermöglicht eine Abdeckung der Klebeverbindung 24 und weist eine vorgegebene Farbe, beispielsweise Silber, auf.So that the adhesive layer 25 is not visible from the outside, the flat edge surface 22 of the lens 21 is provided with a laminating layer 28 applied by a screen printing process. It allows a cover of the adhesive bond 24 and has a predetermined color, such as silver on.

Die Klebeschicht 24 bildet einen Klebestreifen, der sich in einer Breite von wenigen Millimetern randseitig des Gehäuses 19 und der Lichtscheibe 21 erstreckt und von der Randkante 27 und dem Abstandshalter 25 seitlich begrenzt ist.The adhesive layer 24 forms an adhesive strip which extends in a width of a few millimeters edge of the housing 19 and the lens 21 and of the Edge edge 27 and the spacer 25 is laterally limited.

Die Lichtscheibe 21 ist aus einem warmgeformten Flachglas gebildet. Das Flachglas kann beispielsweise mittels eines Schwimmverfahrens (Floatverfahren) hergestellt sein. Zur Formgebung der gebogenen Lichtscheibe 21 wird der ebene Flachglas-Zuschnitt erwärmt, wobei die Verformung infolge des Eigengewichtes des Flachglasteils unter Zuhilfenahme geeigneter Anlagewerkzeuge ausgebildet wird.The lens 21 is formed of a thermoformed flat glass. The flat glass can be produced for example by means of a floating process (float process). For the shaping of the curved lens 21, the flat flat glass blank is heated, wherein the deformation is formed due to the weight of the flat glass part with the aid of suitable investment tools.

Das fertige Formstück wird nachfolgend soweit aufgeheizt, dass es seine Form nicht verliert. Es erfolgt ein langsames Abkühlen des Formstücks, bei dem weniger Spannungen im Glas auftreten. Durch diesen Härtevorgang kann eine Temperaturschockfestigkeit ΔT von größer als 110 Kelvin erzeugt werden.The finished fitting is subsequently heated to the extent that it does not lose its shape. There is a slow cooling of the fitting, occur in which less stress in the glass. By this hardening process, a thermal shock resistance .DELTA.T of greater than 110 Kelvin can be generated.

Vor dem Härtevorgang wird optional auf den innen liegenden ebenen Randflächen 22 der Lichtscheibe 21 (im Befestigungsbereich) die Kaschierschicht 28 mittels eines Siebdruckverfahrens aufgebracht.Before the hardening process, the laminating layer 28 is optionally applied on the inner flat edge surfaces 22 of the light disk 21 (in the fastening region) by means of a screen printing process.

Zur Befestigung der Lichtscheibe 21 an dem Gehäuse 19 wird auf der ebenen Befestigungsfläche 23 ein durch Feuchtigkeit aushärtbarer Einkomponenten-Polyurethan-Klebstoff aufgetragen. Der Abstandshalter 25 verhindert ein Aufbringen der Klebeschicht 24 in den Bereich der mittleren Hauptfläche 26 der Lichtscheibe 21. Nachfolgend wird die Lichtscheibe 21 unter Anlage der ebenen Randfläche 22 an den Abstandshalter 25 an den Vorderrand 23 des Gehäuses 19 angelegt und so lange in dieser Position gehalten, bis die Klebstoffschicht 24 ausgehärtet ist. Der Befestigungsvorgang ist nunmehr beendet.To attach the lens 21 to the housing 19, a moisture-curable one-component polyurethane adhesive is applied to the planar mounting surface 23. The spacer 25 prevents application of the adhesive layer 24 in the region of the central main surface 26 of the lens 21. Subsequently, the lens 21 is applied by abutment of the flat edge surface 22 to the spacer 25 to the front edge 23 of the housing 19 and held in this position for so long until the adhesive layer 24 is cured. The fastening process is now complete.

Das Gehäuse 19, insbesondere der Blendrahmen 13, ist aus einem Duroplast- oder Thermoplast-Kunststoffmaterial hergestellt. Beispielsweise kann das Duroplast-Material als LPP (UP-GF, BMC) und das Thermoplast-Material als PBT (Polybuthylenterephtalat) ausgebildet sein.The housing 19, in particular the frame 13, is made of a thermosetting or thermoplastic plastic material. For example, the thermoset material may be formed as LPP (UP-GF, BMC) and the thermoplastic material as PBT (Polybuthylene terephthalate).

Die Kaschierschicht 28 wird vorzugsweise nur dann auf die Lichtscheibe 21 aufgebracht, wenn die Lichtscheibe 21 im montierten Zustand der Leuchtvorrichtung 1 innerhalb einer Karosserieöffnung einen Spalt zu einem Rand der Karosserieöffnung bildet. Deckt der Rand der Karosserieöffnung den Klebestreifen ab, kann auf die Kaschierschicht 28 verzichtet werden.The laminating layer 28 is preferably applied to the lens 21 only when the lens 21 forms a gap to an edge of the body opening in the mounted state of the lighting device 1 within a body opening. If the edge of the body opening covers the adhesive strip, the laminating layer 28 can be dispensed with.

Nach einer nicht dargestellten alternativen Ausbildung der Erfindung kann die Lichtscheibe 21 auch direkt mit einem Vorderrand der Leuchteinheit-Gehäuse 9, 10, 11 verbunden sein. Diese Ausführung kommt für solche Anwendungen in Frage, in denen auf einen Blendrahmen 13 bzw. ein Adapter 14 verzichtet werden kann.According to an alternative embodiment of the invention, not shown, the lens 21 may also be directly connected to a front edge of the light unit housing 9, 10, 11. This embodiment is suitable for applications in which a frame 13 or an adapter 14 can be dispensed with.

Claims (10)

Leuchtvorrichtung für Kraftfahrzeuge mit einem Lichtkomponenten tragenden Gehäuse bestehend aus einem Kunststoffmaterial, wobei das Gehäuse an einem vorderen Umfangsrand durch Verklebung mit einer die durch den Umfangsrand begrenzten Öffnung des Gehäuses abdeckenden Lichtscheibe aus Glasmaterial verbunden ist, dadurch gekennzeichnet, dass die Lichtscheibe (21) eine ebene Randfläche (22) aufweist, die mittels eines aushärtbaren und thermisch elastischen Klebstoffs (24) unter Ausbildung eines flächigen Klebestreifens mit einer ebenen Befestigungsfläche (23) des Gehäuses (13) verbunden ist.Lighting device for motor vehicles with a light components bearing housing consisting of a plastic material, wherein the housing is connected at a front peripheral edge by gluing to a limited by the peripheral edge opening of the housing lens glass material, characterized in that the lens (21) has a planar Edge surface (22) which is connected by means of a curable and thermally elastic adhesive (24) to form a flat adhesive strip with a planar mounting surface (23) of the housing (13). Leuchtvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die ebene Randfläche (22) der Lichtscheibe (21) und die ebene Befestigungsfläche (23) des Gehäuses (13) parallel zueinander verlaufen.Lighting device according to claim 1, characterized in that the flat edge surface (22) of the light disc (21) and the planar mounting surface (23) of the housing (13) parallel to each other. Leuchtvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass im Bereich der ebenen Randfläche (22) der Lichtscheibe (21) oder der ebenen Befestigungsfläche (23) des Gehäuses (13) ein Abstandshalter (25) abragt, der die Dicke des Klebestreifens (24) vorgibt.Lighting device according to claim 1 or 2, characterized in that in the region of the flat edge surface (22) of the lens (21) or the planar mounting surface (23) of the housing (13) protrudes a spacer (25), the thickness of the adhesive strip (24 ) pretends. Leuchtvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Höhe des Abstandshalters (25), der an dem Gehäuse (13) oder der Lichtscheibe (12) angeformt ist, in einem Bereich von 2 mm bis 8 mm liegt.Lighting device according to one of claims 1 to 3, characterized in that the height of the spacer (25) which is integrally formed on the housing (13) or the lens (12), in a range of 2 mm to 8 mm. Leuchtvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sich an die ebene Randfläche (22) der Lichtscheibe (21) eine mittlere Hauptfläche (26) der Lichtscheibe (21) stetig anschließt.Luminous device according to one of claims 1 to 4, characterized in that on the flat edge surface (22) of the lens (21) a central main surface (26) of the lens (21) connects steadily. Leuchtvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Klebstoff (24) als ein durch Feuchtigkeit aushärtbarer Einkomponenten-Polyurethan-Klebstoff ausgebildet ist.Lighting device according to one of claims 1 to 5, characterized in that the adhesive (24) is formed as a moisture-curable one-component polyurethane adhesive. Leuchtvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Gehäuse (13) aus einem Duroplast- oder Thermoplast-Kunststoffmaterial, vorzugsweise aus LPP oder PBT, und die Lichtscheibe (21) aus einem warmgeformten Flachglas besteht.Lighting device according to one of claims 1 to 6, characterized in that the housing (13) made of a thermosetting or thermoplastic plastic material, preferably of LPP or PBT, and the lens (21) consists of a thermoformed flat glass. Leuchtvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Lichtscheibe (21) auf der ebnen Randfläche (22) mit einer durch Siebdruckverfahren hergestellten Kaschierschicht (28) versehen ist.Lighting device according to one of claims 1 to 7, characterized in that the light disc (21) on the flat edge surface (22) is provided with a laminating layer (28) produced by screen printing. Verfahren zum Befestigen einer Lichtscheibe an ein Gehäuse einer Leuchtvorrichtung für Kraftfahrzeuge, wobei die Lichtscheibe randseitig mit dem Gehäuse verbunden wird, dadurch gekennzeichnet, dass in einem vorderen Randbereich des Gehäuses (19) auf eine ebene Befestigungsfläche (23) desselben eine thermisch elastische Klebstoffschicht (24) aufgetragen wird, dass die Lichtscheibe (21) mit einer ebenen Randfläche (22) derselben unter Bildung eines vorgegebenen Abstands (25) zu der ebenen Befestigungsfläche (23) des Gehäuses (19) an die Klebstoffschicht (24) angelegt wird und so lange in dieser Position gehalten wird, bis die Klebstoffschicht (24) ausgehärtet ist.Method for fastening a lens to a housing of a lighting device for motor vehicles, wherein the lens is peripherally connected to the housing, characterized in that in a front edge region of the housing (19) on a flat mounting surface (23) thereof a thermally elastic adhesive layer (24 ) is applied so that the lens (21) with a flat edge surface (22) of the same to form a predetermined distance (25) to the flat mounting surface (23) of the housing (19) applied to the adhesive layer (24) is held and in this position until the adhesive layer (24) is cured. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Lichtscheibe (21) vor der Befestigung an dem Gehäuse (19) derart gehärtet wird, dass die Temperaturschockfestigkeit (ΔT) größer als 110 Kelvin ist.A method according to claim 9, characterized in that the lens (21) prior to attachment to the housing (19) is cured such that the thermal shock resistance (.DELTA.T) is greater than 110 Kelvin.
EP05017295A 2004-09-17 2005-08-09 Lighting device for vehicle and fastening method Active EP1637801B1 (en)

Applications Claiming Priority (1)

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DE102004045590A DE102004045590A1 (en) 2004-09-17 2004-09-17 Illuminating device for motor vehicles and fastening methods

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EP1637801A3 EP1637801A3 (en) 2006-12-06
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CN103277717A (en) * 2013-06-03 2013-09-04 苏州荣文库柏光电科技有限公司 Flood light
EP2662614A1 (en) 2012-05-10 2013-11-13 Hella Fahrzeugteile Austria GmbH Headlamp for vehicles
WO2018161989A1 (en) * 2017-03-08 2018-09-13 HELLA GmbH & Co. KGaA Lighting device for vehicles and mounting method

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EP2662614A1 (en) 2012-05-10 2013-11-13 Hella Fahrzeugteile Austria GmbH Headlamp for vehicles
CN103277717A (en) * 2013-06-03 2013-09-04 苏州荣文库柏光电科技有限公司 Flood light
CN103277717B (en) * 2013-06-03 2016-06-01 苏州荣文库柏光电科技有限公司 A kind of projection light
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US10935204B2 (en) 2017-03-08 2021-03-02 HELLA GmbH & Co. KGaA Lighting device for vehicles having an adaptor mounting a lens to a vehicle lamp housing at the periphery thereof

Also Published As

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DE102004045590A1 (en) 2006-03-23
EP1637801B1 (en) 2008-01-09
EP1637801A3 (en) 2006-12-06
DE502005002470D1 (en) 2008-02-21
ES2299930T3 (en) 2008-06-01
ATE383545T1 (en) 2008-01-15

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