EP0223943B1 - Head light for a motor vehicle - Google Patents

Head light for a motor vehicle Download PDF

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Publication number
EP0223943B1
EP0223943B1 EP19860112452 EP86112452A EP0223943B1 EP 0223943 B1 EP0223943 B1 EP 0223943B1 EP 19860112452 EP19860112452 EP 19860112452 EP 86112452 A EP86112452 A EP 86112452A EP 0223943 B1 EP0223943 B1 EP 0223943B1
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EP
European Patent Office
Prior art keywords
reflector
incandescent lamp
lamp
light
support arm
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
EP19860112452
Other languages
German (de)
French (fr)
Other versions
EP0223943A2 (en
EP0223943A3 (en
Inventor
Hans-Otto Dr. Ernst
Helmut Jakobsmeyer
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 GmbH and Co KGaA
Original Assignee
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.)
Filing date
Publication date
Application filed by Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Priority to AT86112452T priority Critical patent/ATE62188T1/en
Publication of EP0223943A2 publication Critical patent/EP0223943A2/en
Publication of EP0223943A3 publication Critical patent/EP0223943A3/en
Application granted granted Critical
Publication of EP0223943B1 publication Critical patent/EP0223943B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F21S41/435—Hoods or cap-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices

Definitions

  • the invention relates to a headlight for motor vehicles with a lens covering the reflector, with an incandescent lamp inserted into the apex opening of the reflector and with an essentially U-shaped covering device made of sheet metal and arranged in the vicinity of the incandescent lamp, the web of which connects the legs is arranged between the incandescent lamp and the lens, and whose limb, which extends in the mounting position of the headlamp at a distance above and below the incandescent lamp, is at least partially designed as a reflector sections producing scattered light, the limb arranged below the incandescent lamp essentially as a support arm of the covering device serves and the leg arranged above the incandescent lamp with its free end section the lamp base and / or the lamp holder and / or the reflector regions adjacent to the apex opening with respect to the light emerging from the incandescent lamp t shields.
  • FIG. 1 of the drawing Such a cover device for headlights is shown in Fig. 1 of the drawing.
  • the essentially U-shaped cover device is formed by a cup-shaped sheet metal part, in which the bottom forming the web of the U-shape has a punched-out opening and from the wall forming the lateral surface, two opposite legs of the U-shape serving as support arms are cut free. The sections of the legs adjoining the web are so wide that they serve as cover screens.
  • the leg arranged above the incandescent lamp has a further cover screen at its free end area, which shields both the reflector areas adjacent to the apex opening from the scattered light arising in the base of the glass bulb and the upper edge area of the lamp base from the light rays emerging directly from the filament of the incandescent lamp.
  • the leg has at its free end in addition to the cover screen, two cut-out tongues that can be fixed in slot-like openings in the lamp holder. Due to the heat conduction of the leg serving as a support arm, both the lamp holder and the lamp base, especially if they are made of a material with low heat resistance, can heat up to a critical temperature range or even beyond this.
  • a support arm made of an additional sheet metal strip must be attached at one end to the area arranged above the filament of the incandescent lamp and at the other end to the reflector.
  • the additional fastening of the support arm to the leg is too cumbersome and also too expensive because of the high labor costs.
  • the object of the invention is to design the U-shaped covering device made of sheet metal of the headlight for motor vehicles described in the preamble in such a way that the upper support arm in the vicinity of the web of the U-shape is made in one piece with the leg of the U-shape arranged above the light bulb and can be fixed with the free end far away from the apex region on the reflector in order to dissipate heat via the support arm into a reflector section which is far enough away from the lamp holder and the lamp base.
  • the support arm should run in the light shadow of the leg arranged above the incandescent lamp in order not to cover any additional reflection surface of the reflector.
  • the free cut for the tongue forming the support arm extends over the entire web height into the leg or legs.
  • the length of the support arm can be varied, so that the covering device can only be used by extending the free cut with different reflector sizes.
  • the opening created by the free cutting and the bending out of the tongue forming the support arm is widened in width up to near the side edges of the web.
  • the narrow strips of the web produced by the widened opening run in an arcuate cross-section.
  • the narrow strips of the web have sufficient rigidity.
  • the glass bulb of the incandescent lamp pointing in the direction of light exit has at its free end an opaque cap which shields the light rays emerging directly from the incandescent lamp against the lens.
  • the covering device is produced from a flat sheet metal blank by bending.
  • Such a covering device can be manufactured with a tool that is relatively simple in construction.
  • the free arms of the cover device can be inserted with their free ends into an opening in the reflector. This means that the cover device can be installed quickly and easily.
  • the support arms have tongues cut free at their free ends, which are inserted into slot-like openings of the reflector up to the contact surfaces formed by shoulders of the support arms and whose free end section is bent over on the rear side of the reflector. This ensures that the cover device is securely attached to the reflector.
  • a further advantage is when the support arm arranged below the incandescent lamp is bent with its free end section towards the lower reflector part. As a result, heat from the cover device is also conducted away from this support arm into a reflector section located far enough from the lamp holder or from the lamp base.
  • FIG. 1 of the drawing An embodiment of a cover device of a headlight for motor vehicles, which was assumed in the formation of the preamble of claim 1, is shown in Fig. 1 of the drawing in a perspective view.
  • Fig. 2 shows a longitudinal section through a headlight with a cover
  • FIG. 3 is a perspective view of the covering device from FIG. 2
  • Fig. 1 of the drawing shows a known, substantially U-shaped cover device of a headlight, not shown, for motor vehicles.
  • the cover device consists of a cup-shaped sheet metal part produced in the deep-drawing process, the rectangular base 1 'of which forms a web, has a punched-out opening 2' and from whose wall forming the lateral surface two opposite legs 3 'and serving as support arms. 4 'are cut free.
  • the legs serving as support arms 3 'and. 4 'adjacent to the floor 1' cover screens 5 'which, in the case of a reflector having a rectangular light exit opening, shield the upper and lower flats against light rays emerging directly from the filament.
  • the leg 3 ' has at its free end region two cut-out tongues 6' and the leg 4 'has a cut-out tongue 7'.
  • the tongues 6 'u. 7 ' can be fixed in openings in a lamp holder.
  • the leg 3' has a further cover screen 8 'which is angled toward the leg 4' and which shields the scattered light produced in the base of the glass bulb of an incandescent lamp from the reflector regions adjacent to the lamp holder.
  • the light rays emerging directly from the filament of the incandescent lamps are shielded from the upper edge region of the lamp base of the incandescent lamp by the cover screen.
  • the reflector 9 of which has a rectangular light outlet opening and is covered by a lens 10.
  • the peripheral outer edge of the lens 10 is glued to the reflector edge.
  • the reflector 9 is made of a material with low heat resistance, such as plastic.
  • the apex opening 11 is surrounded by the reflector neck 12, in which the light bulb 13 with the sleeve-shaped lamp base 14 made of plastic is inserted into the reflector neck 12 from the back of the reflector 9.
  • a rubber ring 15 fixed on the lateral surface of the lamp base 14 engages in a circumferential groove on the inside of the reflector neck 12 and fixes the lamp base 14 in the axial direction.
  • the lamp base 14 is fixed by the reflector neck 12 which bears at least in sections on the lateral surface of the sleeve-shaped lamp base 14.
  • the flat plug connections 16 of the incandescent lamp are fastened to the surface of the lamp base 14 directed towards the rear of the reflector.
  • the glass bulb 17 of the incandescent lamp facing the lens has at its free end an opaque cap 18, so that the light rays emerging directly from the filament 19 are shielded from the lens 10.
  • An essentially U-shaped covering device is arranged in the interior of the headlight in the vicinity of the incandescent lamp 13 and is produced from a flat sheet metal blank by bending.
  • the web 1 of the U-shape is arranged running vertically between the incandescent lamp 13 and the lens 10.
  • the legs 3 u. 4 of the U-shape run at a distance above and below the glass bulb 17 of the incandescent lamp.
  • the leg 4 arranged below the glass bulb 17 has an end section 20 which is angled towards the lower reflector part and serves as a support arm of the covering device.
  • a cut-out tongue 21 is bent toward the upper reflector part, the free cut over the entire web height into the legs 3 and. 4 runs into it.
  • This tongue 21, which serves as the second support arm, runs in the light shadow of the leg 3.
  • the support arms 3 u arranged above and below the glass bulb of the incandescent lamp. 4 of the cover device have at their free end portions a cut-out tongue 6 u. 7, which are pushed into slot-like openings of the reflector 9 up to the contact surface 22 of the support arms formed by shoulders.
  • the support arms are securely attached to the reflector 9.
  • the opening 2 created by the free cutting and bending out of the tongue 21 forming the support arm is widened so close to the side edges of the U-shape that two narrow strips of the web 1 delimiting the opening remain.
  • the narrow strips of the web are arched in cross-section.
  • the one arranged above and below the bulb 13 Adjacent to the opening 2, the one arranged above and below the bulb 13 Leg 3 u. 4 has a cover screen 5 which shields the light rays emerging directly from the filament 19 of the incandescent lamp from the flattened areas 24 of the reflector 9 which have a rectangular light exit surface and produce scattered light.
  • the leg 3 arranged above the glass bulb 17 has a third cover screen 8 which is bent towards the optical axis and which covers the light rays emerging directly from the filament 19 relative to the upper edge region of the lamp base 14 made of plastic and that of the apex opening Shields 11 adjacent reflector areas from the scattered rays generated in the base of the glass bulb 17.

Abstract

The invention concerns a headlight for motor vehicles, with a cover plate that covers up the reflector. An essentially U-shaped enclosure made out of sheet metal is positioned in the vicinity of the lamp, which fits into an opening in the vertex of the reflector. The flanks of the enclosure extend above and below but not in contact with the lamp, at least to some extent constituting a screen that screens off sections of the reflector that generate diffused light. The flank below the lamp also functions essentially as a supporting arm for the enclosure. The free terminal section of the supporting arm above the lamp has a third screen. A tongue is punched and bent out of the area of the U-shaped enclosure between the lamp and the cover plate and constitutes the upper supporting arm.

Description

Die Erfindung bezieht sich auf einen Scheinwerfer für Kraftfahrzeuge mit einer den Reflektor abdeckenden Lichtscheibe, mit einer in die Scheitelöffnung des Reflektors eingesetzten Glühlampe und mit einer aus Blech hergestellten, in der Nähe der Glühlampe angeordneten, im wesentlichen U-förmigen Abdeckvorrichtung, deren die Schenkel verbindenderSteg zwischen der Glühlampe und der Lichtscheibe angeordnet ist und deren in der Anbaulage des Scheinwerfers in einem Abstand oberhalb und unterhalb der Glühlampe verlaufende Schenkel zumindest teilweise als Streulicht erzeugende Reflektorabschnitte abdeckender Schirm ausgebildet ist, wobei der unterhalb der Glühlampe angeordnete Schenkel im wesentlichen als ein Tragarm der Abdeckvorrichtung dient und der oberhalb der Glühlampe angeordnete Schenkel mit seinem freien Endabschnitt den Lampensockel und/oder die Lampenfassung und/oder die der Scheitelöffnung benachbarten Reflektorbereiche gegenüber dem aus der Glühlampe austretenden Licht abschirmt.The invention relates to a headlight for motor vehicles with a lens covering the reflector, with an incandescent lamp inserted into the apex opening of the reflector and with an essentially U-shaped covering device made of sheet metal and arranged in the vicinity of the incandescent lamp, the web of which connects the legs is arranged between the incandescent lamp and the lens, and whose limb, which extends in the mounting position of the headlamp at a distance above and below the incandescent lamp, is at least partially designed as a reflector sections producing scattered light, the limb arranged below the incandescent lamp essentially as a support arm of the covering device serves and the leg arranged above the incandescent lamp with its free end section the lamp base and / or the lamp holder and / or the reflector regions adjacent to the apex opening with respect to the light emerging from the incandescent lamp t shields.

Eine solche Abdeckvorrichtung für Scheinwerfer ist in Fig. 1 der Zeichnung dargestellt. Die im wesentlichen U-förmige Abdeckvorrichtung wird von einem becherförmigen Blechteil gebildet, bei welchem der den Steg der U-Form bildende Boden eine ausgestanzte Öffnung aufweist und aus dessen die Mantelfläche bildende Wandung zwei sich gegenüberliegende als Tragarme dienende Schenkel der U-Form freigeschnitten sind. Die an den Steg angrenzenden Abschnitte der Schenkel sind so breit ausgeführt, daß sie als Abdeckschirme dienen. Der oberhalb der Glühlampe angeordnete Schenkel weist an seinem freien Endbereich einen weiteren Abdeckschirm auf, der sowohl die der Scheitelöffnung benachbarten Reflektorbereiche gegenüber dem in Fuß des Glaskolbens entstehenden Streulicht als auch den oberen Randbereich des Lampensockels gegenüber den direkt aus dem Glühfaden der Glühlampe austretenden Lichtstrahlen abschirmt. Damit der oberhalb der Glühlampe angeordnete Schnekel auch als Tragarm der Abdeckvorrichtung vorwendbar ist, weist der Schenkel an seinem freien Ende außer dem Abdeckschirm zwei freigeschnittene Zungen auf, die in schlitzartigen Öffnungen der Lampenfassung festsetzbar sind. Durch die Wärmeleitung des als Tragarm dienenden Schenkels können sich sowohl die Lampenfassung als auch der Lampensockel, besonders wenn sie aus einem Werkstoff mit geringer Warmfestigkeit hergestellt sind, bis zu einem kritischen Temperaturbereich oder sogar über diesen hinaus aufheizen. Um bei einer solchen Abdeckvorrichtung, deren oberhalb der Glühlampe angeordneter Schenkel an seinem freien Ende den in der Nähe des Lampensockels angeordneten Abdeckschirm aufweist, die Wärme des Schenkels über den Tragarm in einen Reflektorabschnitt ableiten zu können, der in einem ausreichend großen Abstand zur Lampenfassung und dem Lampensockel liegt, müßen ein aus einem zusätzlichen Blechstreifen hergestellter Tragarm mit einem Ende an dem über dem Glühfaden der Glühlampe angeordneten Bereich und mit dem anderen Ende am Reflektor befestigt werden. Bei Masseartikeln ist das zusätzliche Befestigen des Tragarms an dem Schenkel zu umständlich und wegen zu hoher Lohnkosten auch zu teuer.Such a cover device for headlights is shown in Fig. 1 of the drawing. The essentially U-shaped cover device is formed by a cup-shaped sheet metal part, in which the bottom forming the web of the U-shape has a punched-out opening and from the wall forming the lateral surface, two opposite legs of the U-shape serving as support arms are cut free. The sections of the legs adjoining the web are so wide that they serve as cover screens. The leg arranged above the incandescent lamp has a further cover screen at its free end area, which shields both the reflector areas adjacent to the apex opening from the scattered light arising in the base of the glass bulb and the upper edge area of the lamp base from the light rays emerging directly from the filament of the incandescent lamp. So that the snail arranged above the light bulb can also be used as a support arm of the covering device, the leg has at its free end in addition to the cover screen, two cut-out tongues that can be fixed in slot-like openings in the lamp holder. Due to the heat conduction of the leg serving as a support arm, both the lamp holder and the lamp base, especially if they are made of a material with low heat resistance, can heat up to a critical temperature range or even beyond this. In order to be able to dissipate the heat of the leg via the support arm into a reflector section in such a covering device, whose leg arranged above the incandescent lamp has at its free end the cover screen arranged near the lamp base, which is at a sufficiently large distance from the lamp holder and the Lamp base is located, a support arm made of an additional sheet metal strip must be attached at one end to the area arranged above the filament of the incandescent lamp and at the other end to the reflector. In the case of bulk articles, the additional fastening of the support arm to the leg is too cumbersome and also too expensive because of the high labor costs.

Aufgabe der Erfindung ist es, die aus Blech hergestellte U-förmige Abdeckvorrichtung des im Gattungsbegriff beschriebenen Scheinwerfers für Kraftfahrzeuge derart auszubilden, daß der obere Tragarm in der Nähe des Stegs der U-Form mit dem oberhalb der Glühlampe angeordneten Schenkel der U-Form einteilig ausgeführt und mit dem freien Ende weit ab vom Scheitelbereich an dem Reflektor festsetzbar ist, um Wärme über den Tragarm in einen von der Lampenfassung und dem Lampensockel weite genug entfernt liegenden Reflektorabschnitt abzuleiten. Darüber hinaus soll der Tragarm im Lichtschatten den oberhalb der Glühlampe angeordneten Schenkels verlaufen, um keine zusätzliche Reflexionsfläche des Reflektors abzudecken. Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß eine aus dem zwischen der Glühlampe und der Lichtscheibe verlaufenden Bereich der U-förmigen Abdeckvorrichtung freigeschnittene Zunge herausgebogen ist und den oberen, an dem Reflektor festsetzbaren Tragarm bildet. Eine solche Lösung ist sehr einfach und kann sehr kostengünstig hergestellt werden.The object of the invention is to design the U-shaped covering device made of sheet metal of the headlight for motor vehicles described in the preamble in such a way that the upper support arm in the vicinity of the web of the U-shape is made in one piece with the leg of the U-shape arranged above the light bulb and can be fixed with the free end far away from the apex region on the reflector in order to dissipate heat via the support arm into a reflector section which is far enough away from the lamp holder and the lamp base. In addition, the support arm should run in the light shadow of the leg arranged above the incandescent lamp in order not to cover any additional reflection surface of the reflector. This object is achieved according to the invention in that a tongue cut out from the area of the U-shaped covering device running between the incandescent lamp and the lens is bent out and forms the upper support arm which can be fixed on the reflector. Such a solution is very simple and can be manufactured very inexpensively.

Weiterhin ist es vorteilhaft, wenn der Freischnitt für die den Tragarm bildende Zunge über die gesamte Steghöhe bis in den oder die Schenkel hinein verläuft. Durch eine solche Lösung kann der Tragarm in seiner Länge variabel ausgeführt werden, so daß die Abdeckvorrichtung nur durch Verlängerung des Freischnittes bei unterschiedlichen Reflektorgrößen verwendbar ist.Furthermore, it is advantageous if the free cut for the tongue forming the support arm extends over the entire web height into the leg or legs. With such a solution, the length of the support arm can be varied, so that the covering device can only be used by extending the free cut with different reflector sizes.

Ein weiterer Vorteil ist es, wenn die durch den Freischnitt und das Herausbiegen der den Tragarm bildende Zunge erzeugte Öffnung in der Breite bis nahe der Seitenkanten des Stegs verbreitert ist. Bei einer solchen Lösung kann die über der Glühlampe stark aufgezeizte Luft durch die Öffnung gut entweichen und nach oben steigen.It is a further advantage if the opening created by the free cutting and the bending out of the tongue forming the support arm is widened in width up to near the side edges of the web. With such a solution, the air, which is heavily heated up above the light bulb, can escape well through the opening and rise upwards.

Ebenfalls ist es vorteilhaft, wenn die durch die verbreiterte Öffnung erzeugten schmalen Streifen des Stegs im Querschnitt bogenförmig verlaufen. Dadurch weisen die schmalen Streifen des Stegs eine ausreichende Steifigkeit auf.It is also advantageous if the narrow strips of the web produced by the widened opening run in an arcuate cross-section. As a result, the narrow strips of the web have sufficient rigidity.

Außerdem ist es vorteilhaft, wenn der in Lichtaustrittsrichtung weisende Glaskolben der Glühlampe an seinem freien Ende eine lichtundurchlässige Abdeckkappe aufweist, die gegenüber der Lichtscheibe die direkt aus der Glühlampe austretenden Lichtstrahlen abschirmt. Durch die Verwendung einer solchen Glühlampe können die Lichtstrahlen nicht durch die Öffnung im mittleren Bereich der Abdeckvorrichtung hindurchtreten und eine Blendung verursachen.In addition, it is advantageous if the glass bulb of the incandescent lamp pointing in the direction of light exit has at its free end an opaque cap which shields the light rays emerging directly from the incandescent lamp against the lens. By using such an incandescent lamp, the light rays cannot pass through the opening in the central region of the covering device and cause glare.

Ferner ist es vorteilhaft, wenn die Abdeckvorrichtung aus einem planen Blechzuschnitt durch Biegen hergestellt ist. Eine solche Abdeckvorrichtung kann mit einem im Aufbau relativ einfachen Werkzeug hergestellt werden.It is also advantageous if the covering device is produced from a flat sheet metal blank by bending. Such a covering device can be manufactured with a tool that is relatively simple in construction.

Bei einer vorteilhaften Ausführungsform der Erfindung sind die Tragarme der Abdeckvorrichtung mit ihren freien Enden selbstrastend in eine Öffnung des Reflektors einsetzbar. Dadurch ist die Abdeckvorrichtung einfach und schnell zu montieren.In an advantageous embodiment of the invention, the free arms of the cover device can be inserted with their free ends into an opening in the reflector. This means that the cover device can be installed quickly and easily.

Bei einer anderen Ausführungsform der Erfindung weisen die Tragarme an ihren freien Enden freigeschnittene Zungen auf, die bis zu den von Schultern der Tragarme gebildeten Anlageflächen in schlitzartige Öffnungen des Reflektors eingeschoben sind und deren freier Endabschnitt auf der Rückseite des Reflektors umgebogen ist. Hierbei ist ein sicherer Festsitz der Abdeckvorrichtung am Reflektor gewährleistet.In another embodiment of the invention, the support arms have tongues cut free at their free ends, which are inserted into slot-like openings of the reflector up to the contact surfaces formed by shoulders of the support arms and whose free end section is bent over on the rear side of the reflector. This ensures that the cover device is securely attached to the reflector.

Ein weiterer Vorteil ist es, wenn der unterhalb der Glühlampe angeordnete Tragarm mit seinem freien Endabschnitt zum unteren Reflektorteil hin abgebogen ist. Dadurch wird auch von diesem Tragarm Wärme der Abdeckvorrichtung in einen von der Lampenfassung bzw. von dem Lampensockel weit genug entfernt gelegenen Reflektorabschnitt abgeleitet.A further advantage is when the support arm arranged below the incandescent lamp is bent with its free end section towards the lower reflector part. As a result, heat from the cover device is also conducted away from this support arm into a reflector section located far enough from the lamp holder or from the lamp base.

Ein Ausführungsbeispiel von einer Abdeckvorrichtung eines Scheinwerfers für Kraftfahrzeuge, von dem bei der Bildung des Oberbegriffs des Patentanspruchs 1 ausgegangen wurde, ist in Fig. 1 der Zeichnung in einer perspektivischen Ansicht dargestellt.An embodiment of a cover device of a headlight for motor vehicles, which was assumed in the formation of the preamble of claim 1, is shown in Fig. 1 of the drawing in a perspective view.

Weiterhin ist die Erfindung in der Zeichnung dargestellt, und zwar zeigtFurthermore, the invention is shown in the drawing, namely shows

Fig. 2 einen Längsschnitt durch einen Scheinwerfer mit einer Abdeckvorrichtung undFig. 2 shows a longitudinal section through a headlight with a cover and

Fig. 3 in einer perspektivischen Ansicht die Abdeckvorrichtung aus Fig. 23 is a perspective view of the covering device from FIG. 2

Fig. 1 der Zeichnung zeigt eine bekannte, im wesentlichen U-förmige Abdeckvorrichtung eines nicht dargestellten Scheinwerfers für Kraftfahrzeuge. Die Abdeckvorrichtung besteht aus einem im Tiefziehverfahren hergestellten becherförmigen Blechteil, dessen rechteckiger, den Steg bildender Boden 1' eine ausgestanzte Öffnung 2' aufweist und aus dessen die Mantelfläche bildende Wandung zwei gegenüberliegende, als Tragarme dienende Schenkel 3' u. 4' freigeschnitten sind.Fig. 1 of the drawing shows a known, substantially U-shaped cover device of a headlight, not shown, for motor vehicles. The cover device consists of a cup-shaped sheet metal part produced in the deep-drawing process, the rectangular base 1 'of which forms a web, has a punched-out opening 2' and from whose wall forming the lateral surface two opposite legs 3 'and serving as support arms. 4 'are cut free.

Außerdem weisen die als Tragarme dienenden Schenkel 3' u. 4' angrenzend an den Boden 1' Abdeckschirme 5' auf, die bei einem eine rechteckige Lichtaustrittsöffnung aufweisenden Reflektor die obere und untere Abflachung gegen direkt aus dem Glühfaden austretende Lichtstrahlen abschirmen. Außerdem weist der Schenkel 3' an seinem freien Endbereich zwei freigeschnittene Zungen 6' auf und der Schenkel 4' eine freigeschnittene Zunge 7'. Die Zungen 6' u. 7' sind in Öffnungen einer Lampenfassung festsetzbar. Zwischen den beiden Zungen 6' weist der Schenkel 3' einen weiteren, zum Schenkel 4' hin abgewinkelten Abdeckschirm 8' auf, der das in Fuß des Glaskolbens einer Glühlampe entstehende Streulicht gegenüber den der Lampenfassung benachbarten Reflektorbereiche abschirmt. Außerdem sind durch den Abdeckschirm die direkt aus dem Glühfaden der Glühlampen austretenden Lichtstrahlen gegenüber dem oberen Randbereich des Lampensockels der Glühlampe abgeschirmt.In addition, the legs serving as support arms 3 'and. 4 'adjacent to the floor 1' cover screens 5 'which, in the case of a reflector having a rectangular light exit opening, shield the upper and lower flats against light rays emerging directly from the filament. In addition, the leg 3 'has at its free end region two cut-out tongues 6' and the leg 4 'has a cut-out tongue 7'. The tongues 6 'u. 7 'can be fixed in openings in a lamp holder. Between the two tongues 6 ', the leg 3' has a further cover screen 8 'which is angled toward the leg 4' and which shields the scattered light produced in the base of the glass bulb of an incandescent lamp from the reflector regions adjacent to the lamp holder. In addition, the light rays emerging directly from the filament of the incandescent lamps are shielded from the upper edge region of the lamp base of the incandescent lamp by the cover screen.

Fig. 2 der Zeichnung zeigt einen Scheinwerfer für Kraftfahrzeuge nach der Erfindung, dessen eine rechteckige Lichtaustrittsöffnung aufweisender Reflektor 9 durch eine Lichtscheibe 10 abgedeckt ist. Der umlaufende äußere Rand der Lichtscheibe 10 ist mit dem Reflektorrand verklebt. Der Reflektor 9 ist aus einem Werkstoff mit geringer Warmfestigkeit, wie z.B. Kunststoff, hergestellt. Auf der Rückseite des Reflektors 9 ist die Scheitelöffnung 11 von dem Reflektorhals 12 umgeben, in den von der Rückseite des Reflektors 9 her die Glühlampe 13 mit dem aus Kunststoff hergestellten hülsenförmigen Lampensockel 14 in den Reflektorhals 12 eingesetzt ist. Dabei greift ein an der Mantelfläche des Lampensockels 14 festgesetzter Gummiring 15 in eine umlaufende Nut auf der Innenseite des Reflektorhalses 12 ein und setzt den Lampensockel 14 in axialer Richtung fest. In radialer Richtung ist der Lampensockel 14 durch den zumindest abschnittweise an der Mantelfläche des hülsenförmigen Lampensockels 14 anliegenden Reflektorhals 12 festgesetzt. An der zur Reflektorrückseite gerichteten Fläche des Lampensockels 14 sind die Flachsteckeranschlüsse 16 der Glühlampe befestigt.2 of the drawing shows a headlight for motor vehicles according to the invention, the reflector 9 of which has a rectangular light outlet opening and is covered by a lens 10. The peripheral outer edge of the lens 10 is glued to the reflector edge. The reflector 9 is made of a material with low heat resistance, such as plastic. On the back of the reflector 9, the apex opening 11 is surrounded by the reflector neck 12, in which the light bulb 13 with the sleeve-shaped lamp base 14 made of plastic is inserted into the reflector neck 12 from the back of the reflector 9. In this case, a rubber ring 15 fixed on the lateral surface of the lamp base 14 engages in a circumferential groove on the inside of the reflector neck 12 and fixes the lamp base 14 in the axial direction. In the radial direction, the lamp base 14 is fixed by the reflector neck 12 which bears at least in sections on the lateral surface of the sleeve-shaped lamp base 14. The flat plug connections 16 of the incandescent lamp are fastened to the surface of the lamp base 14 directed towards the rear of the reflector.

Der zur Lichtscheibe weisende Glaskolben 17 der Glühlampe weist an seinem freien Ende eine lichtundurchlässige Abdeckkappe 18 auf, so daß die direkt aus dem Glühfaden 19 austretenden Lichtstrahlen gegenüber der Lichtscheibe 10 abgeschirmt sind.The glass bulb 17 of the incandescent lamp facing the lens has at its free end an opaque cap 18, so that the light rays emerging directly from the filament 19 are shielded from the lens 10.

Im Scheinwerferinneren ist in der Nähe der Glühlampe 13 eine im wesentlichen U-förmige Abdeckvorrichtung angeordnet, die aus einem planen Blechzuschnitt durch Biegen hergestellt ist. Der Steg 1 der U-Form ist senkrecht verlaufend zwischen der Glühlampe 13 und der Lichtscheibe 10 angeordnet. Die Schenkel 3 u. 4 der U-Form verlaufen in einem Abstand oberhalb und unterhalb des Glaskolbens 17 der Glühlampe. Der unterhalb des Glaskolbens 17 angeordnete Schenkel 4 weist einen zum unteren Reflektorteil hin abgewinkelten Endabschnitt 20 auf und dient als Tragarm der Abdeckvorrichtung. Aus dem zwischen dem Glaskolben 17 und der Lichtscheibe 10 angeordneten Bereich der U-förmigen Abdeckvorrichtung ist eine freigeschnittene Zunge 21 zum oberen Reflektorteil hin abgebogen, wobei der Freischnitt über die gesamte Steghöhe bis in die Schenkel 3 u. 4 hinein verläuft. Diese als zweiter Tragarm dienende Zunge 21 verläuft im Lichtschatten des Schenkels 3.An essentially U-shaped covering device is arranged in the interior of the headlight in the vicinity of the incandescent lamp 13 and is produced from a flat sheet metal blank by bending. The web 1 of the U-shape is arranged running vertically between the incandescent lamp 13 and the lens 10. The legs 3 u. 4 of the U-shape run at a distance above and below the glass bulb 17 of the incandescent lamp. The leg 4 arranged below the glass bulb 17 has an end section 20 which is angled towards the lower reflector part and serves as a support arm of the covering device. From the area of the U-shaped covering device arranged between the glass bulb 17 and the lens 10, a cut-out tongue 21 is bent toward the upper reflector part, the free cut over the entire web height into the legs 3 and. 4 runs into it. This tongue 21, which serves as the second support arm, runs in the light shadow of the leg 3.

Die oberhalb und unterhalb des Glaskolbens der Glühlampe angeordneten Tragarme 3 u. 4 der Abdeckvorrichtung weisen an ihren freien Endabschnitten eine freigeschnittene Zunge 6 u. 7 auf, die in schlitzartige Öffnungen des Reflektors 9 bis zur von Schultern gebildeten Anlagefläche 22 der Tragarme hineingeschoben sind. Durch Umbiegen der aus den Öffnungen herausragenden Endabschnitte 23 auf der Rückseite des Reflektors sind die Tragarme sicher am Reflektor 9 festgesetzt. Die durch den Freischnitt und das Herausbiegen der den Tragarm bildenden Zunge 21 erzeugte Öffnung 2 ist bis so nahe an die Seitenkanten der U-Form verbreitert, daß zwei schmale, die Öffnung seitlich begrenzende Streifen des Stegs 1 verbleiben. Die schmalen Streifen des Stegs verlaufen im Querschnitt bogenförmig. Angrenzend an die Öffnung 2 weist der oberhalb und unterhalb der Glühlampe 13 angeordnete Schenkel 3 u. 4 einen Abdeckschirm 5 auf, der die direkt aus dem Glühfaden 19 der Glühlampe austretenden Lichtstrahlen gegenüber den Streulicht erzeugenden Abflachungen 24 des eine rechteckige Lichtaustrittsfläche aufweisenden Reflektors 9 abschirmt. An dem freien Endbereich weist der oberhalb des Glaskolbens 17 angeordnete Schenkel 3 einen dritten, zur optischen Achse hin abgebogenen Abdeckschirm 8 auf, der die direkt aus dem Glühfaden 19 die Glühlampe austretenden Lichstrahlen gegenüber dem oberen Randbereich des aus Kunststoff hergestellten Lampensockels 14 und die der Scheitelöffnung 11 benachbarten Reflektorbereiche gegenüber den im Fuß des Glaskolbens 17 erzeugten Streustrahlen abschirmt.The support arms 3 u arranged above and below the glass bulb of the incandescent lamp. 4 of the cover device have at their free end portions a cut-out tongue 6 u. 7, which are pushed into slot-like openings of the reflector 9 up to the contact surface 22 of the support arms formed by shoulders. By bending the end portions 23 protruding from the openings on the back of the reflector, the support arms are securely attached to the reflector 9. The opening 2 created by the free cutting and bending out of the tongue 21 forming the support arm is widened so close to the side edges of the U-shape that two narrow strips of the web 1 delimiting the opening remain. The narrow strips of the web are arched in cross-section. Adjacent to the opening 2, the one arranged above and below the bulb 13 Leg 3 u. 4 has a cover screen 5 which shields the light rays emerging directly from the filament 19 of the incandescent lamp from the flattened areas 24 of the reflector 9 which have a rectangular light exit surface and produce scattered light. At the free end region, the leg 3 arranged above the glass bulb 17 has a third cover screen 8 which is bent towards the optical axis and which covers the light rays emerging directly from the filament 19 relative to the upper edge region of the lamp base 14 made of plastic and that of the apex opening Shields 11 adjacent reflector areas from the scattered rays generated in the base of the glass bulb 17.

Claims (9)

  1. Headlight for motor vehicles having a light pane (10) covering the reflector, having an incandescent lamp (13) placed in the vertex opening of the reflector (9), and having an essentially U-shaped masking device which is produced from sheet metal and is arranged in the vicinity of the incandescent lamp, and whose web (1) connecting the limbs is arranged between the incandescent lamp and the light pane and whose limbs (3,4), which extend in the headlight's installed position at a distance above and below the incandescent lamp, are constructed at least partially as a screen which masks reflector sections generating scattered light, the limb (4) arranged under the incandescent lamp serving essentially as a support arm of the masking device and the limb (3) arranged above the incandescent lamp screening, by means of its free end section, the lamp cap and/or the lamp holder and/or the reflector regions adjacent to the vertex opening against the light emerging from the incandescent lamp, characterised in that a tongue (21) that is cut free from the region of the U-shaped masking device extending between the incandescent lamp (13) and the light pane (10) is bent outwards and forms the upper support arm, which can be fixed to the reflector (9).
  2. Headlight according to Claim 1, characterised in that the part cut free for the tongue (21) forming the support arm extends over the entire web height into the limb or limbs (3 and 4).
  3. Headlight according to Claim 1 or 2, characterised in that the opening (2) produced by cutting free and bending out the tongue (21) forming the support arm is increased in width as far as the vicinity of the side edges of the web (1).
  4. Headlight according to Claim 3, characterised in that the narrow strips of the web (1) produced by the widened opening extend arcuately in cross-section.
  5. Headlight according to one of the preceding claims, characterised in that at its free end the glass bulb (17) of the incandescent lamp pointing in the direction of emergence of the light has a light-proof masking cap (18), which screens the light pane (10) against the light beams emerging directly from the incandescent lamp (13).
  6. Headlight according to one of the preceding claims, characterised in that the masking device is produced by bending from a plane metal sheet cut to size.
  7. Headlight according to one of the preceding claims, characterised in that the support arms (4 and 21) of the masking device can be inserted in a self-locking fashion with their free ends into an opening of the reflector (9).
  8. Headlight according to one of the preceding claims, characterised in that at their free ends the support arms have tongues (6 and 7) cut free, which are pushed into slot-like openings of the reflector (9) as far as the bearing surfaces formed by shoulders (22) of the support arms, and whose free end section is bent back onto the rear of the reflector.
  9. Headlight according to one of the preceding claims, characterised in that the support arm (4) arranged below the incandescent lamp is bent with its free end section (20) towards the lower reflector part.
EP19860112452 1985-11-13 1986-09-09 Head light for a motor vehicle Expired - Lifetime EP0223943B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86112452T ATE62188T1 (en) 1985-11-13 1986-09-09 HEADLIGHTS FOR MOTOR VEHICLES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3540130 1985-11-13
DE3540130A DE3540130C1 (en) 1985-11-13 1985-11-13 Headlights for motor vehicles

Publications (3)

Publication Number Publication Date
EP0223943A2 EP0223943A2 (en) 1987-06-03
EP0223943A3 EP0223943A3 (en) 1988-09-14
EP0223943B1 true EP0223943B1 (en) 1991-04-03

Family

ID=6285789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860112452 Expired - Lifetime EP0223943B1 (en) 1985-11-13 1986-09-09 Head light for a motor vehicle

Country Status (5)

Country Link
US (1) US4679127A (en)
EP (1) EP0223943B1 (en)
AT (1) ATE62188T1 (en)
DE (1) DE3540130C1 (en)
ES (1) ES2003463A6 (en)

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JPH0353365Y2 (en) * 1987-03-31 1991-11-21
US4814959A (en) * 1988-02-25 1989-03-21 Gte Products Corporation Heat shield for low profile automotive headlight
JPH07109721B2 (en) * 1990-08-07 1995-11-22 株式会社小糸製作所 Vehicle headlights
DE4227888C1 (en) * 1992-08-22 1993-12-02 Hella Kg Hueck & Co Fastening the cover plate to the housing of motor vehicle headlights
DE4310048C2 (en) * 1993-03-27 1995-07-20 Hella Kg Hueck & Co Method for attaching a translucent lens to a support element of a lamp, in particular a vehicle headlight
FR2704934B1 (en) * 1993-05-04 1995-08-04 Valeo Vision MOTOR VEHICLE SPOTLIGHT EQUIPPED WITH RADIATOR MEANS AND AN OCCULTATION OR LIGHT TREATMENT ELEMENT.
US5497299A (en) * 1994-12-12 1996-03-05 General Motors Corporation Headlamp assembly with hook-in bulb shield
JP3176535B2 (en) * 1995-06-21 2001-06-18 株式会社小糸製作所 Vehicle lighting
JP3791626B2 (en) * 1995-12-22 2006-06-28 株式会社小糸製作所 Vehicle headlamp
US5993035A (en) * 1998-03-09 1999-11-30 Trans Technology Engineered Components, Llc Combined light shield and heat shield for headlight
DE10354992B4 (en) * 2003-11-25 2006-06-08 GM Global Technology Operations, Inc., Detroit light assembly
DE102004004651B3 (en) * 2004-01-29 2005-12-01 Flowil International Lighting (Holding) B.V. Lamp for general lighting purposes
FR3022978B1 (en) * 2014-06-30 2018-08-24 Valeo Vision COVER OF AN OPTICAL MODULE FOR MOTOR VEHICLE
JP6595258B2 (en) 2015-08-26 2019-10-23 株式会社小糸製作所 Lamp

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Also Published As

Publication number Publication date
DE3540130C1 (en) 1987-04-02
EP0223943A2 (en) 1987-06-03
EP0223943A3 (en) 1988-09-14
ES2003463A6 (en) 1988-11-01
ATE62188T1 (en) 1991-04-15
US4679127A (en) 1987-07-07

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