EP0355528B1 - Dipped vehicle headlamp - Google Patents

Dipped vehicle headlamp Download PDF

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Publication number
EP0355528B1
EP0355528B1 EP89114441A EP89114441A EP0355528B1 EP 0355528 B1 EP0355528 B1 EP 0355528B1 EP 89114441 A EP89114441 A EP 89114441A EP 89114441 A EP89114441 A EP 89114441A EP 0355528 B1 EP0355528 B1 EP 0355528B1
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EP
European Patent Office
Prior art keywords
lens
frame
reflector
cap
diaphragm
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
EP89114441A
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German (de)
French (fr)
Other versions
EP0355528A3 (en
EP0355528A2 (en
Inventor
Franz-Josef Böckeler
Horst Jackenkroll
Karl Witte
Axel Buchhorn
Hubert Marks
Wolfgang Gossmann
Diethard Schnelle
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
Publication of EP0355528A2 publication Critical patent/EP0355528A2/en
Publication of EP0355528A3 publication Critical patent/EP0355528A3/en
Application granted granted Critical
Publication of EP0355528B1 publication Critical patent/EP0355528B1/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
    • 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
    • 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
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F21S41/55—Attachment thereof

Definitions

  • the invention relates to a vehicle headlight with the features according to the preamble of claim 1.
  • the frame is formed by a cup-shaped sheet metal part produced in the deep-drawing process.
  • the arms of the frame attached to the reflector are cut free from the wall of the cup-shaped sheet metal part forming the lateral surface.
  • Another arm cut free from this wall has an end section which is angled towards the optical and which serves as a diaphragm.
  • An opening is cut out of the bottom of the cup-shaped sheet metal part, the peripheral region of which is the lens frame, which surrounds it and extends to the arms.
  • the contact surface for the lens inserted into the lens frame from the underside of the cup-shaped frame is the free ends of tongues, which are cut free from the lens frame and bent radially inwards.
  • the bearing surfaces are exactly in a vertical plane to the optical axis, it is necessary to remove the free ends of the tongues by an additional operation such. B. by cutting, need to be reworked.
  • the tongues can only be made using adjustable tool parts.
  • the panel is adjusted by an additional operation, such as. B. laser welding. (See DE-PS 35 16 812).
  • the lens is inserted between the arms of the frame in the lens frame and rests on an annular support surface of the lens frame facing the reflector. Furthermore, the screen is inserted between the arms of the frame and attached to the lens frame.
  • the diaphragm is made from a sheet metal strip, which is formed into a semicircular arc around an infinite number of bending lines running transversely to its longitudinal extent. Since such an arch can spring up with its end sections to a different degree, there is a relatively large tolerance range for the distance between the central region of the diaphragm edge and the contact surface for the lens. This does not guarantee that the central area of the diaphragm edge is exactly in the focal point of the lens. Only in this case is the cut-off line clearly shown.
  • the object of the invention is to improve the headlights described in the preamble of claim 1 such that the distance between the diaphragm edge generating the light-dark boundary is a fixed, unchangeable dimension, which is most safely ensured by this distance dimension the distance from tool parts is specified, which are arranged within a tool half.
  • the lens should continue from the front, i. H. even after installing the frame with the reflector can be easily placed on the lens frame and the screen can be very rigid in itself without additional fasteners.
  • the dome-shaped bulge can be produced using the deep-drawing process.
  • the opening is formed by the entire region of the dome-shaped bulge cut out above the diaphragm edge.
  • all light rays passing through the opening are not directed upwards and therefore cannot dazzle oncoming traffic.
  • the mass decreases in the area of the frame that carries the relatively heavy lens.
  • annular contact surface for the lens runs offset from the reflector by a circumferential step in the lens frame.
  • the position of the diaphragm edge towards the lens is also very precise, since the stepped circular ring surface together with the dome-shaped bulge can be pulled out of the central area of the frame receiving the lens .
  • the screen and the frame do not have to have any blackening on the sides facing the reflector in order to absorb light.
  • a blackening of these sides is not necessary, since all light rays of the incandescent lamp are shielded from the aperture and the frame to the outside below the edge of the aperture and the light rays striking the dome-shaped aperture are diffusely scattered in the direction of the reflector and therefore cannot dazzle oncoming traffic .
  • the lower half of the dome-shaped bulge of the frame has a punched-out opening.
  • the drawing shows a dimmed vehicle headlight which essentially consists of an ellipsoidal reflector (1) and an aperture (3) arranged between the convex lens (2) and the reflector (1).
  • the internal reflection surface of the reflector (1) forms a semi-ellipse in the axial longitudinal sections.
  • the filament (4) of the incandescent lamp (5) is arranged in the focal point of the semi-ellipses.
  • the diaphragm edge (6) of the diaphragm (3) which produces the light-dark boundary is arranged in the focal point of the lens (2).
  • the ellipsoidal reflector (1) has an opening (7) on the apex for receiving an annular lamp holder (8).
  • the incandescent lamp (5) is inserted into the lamp holder from the rear of the reflector and is pressed against the outside of the lamp holder (8) by the wire spring (9) with its flange projecting radially outwards.
  • a rubber cap (10) is placed on the lamp holder (8).
  • the diaphragm (3) is made in one piece with a frame (11) made of sheet metal, the arms (12) of which are firmly connected to the edge region of the reflector (1).
  • the arms (12) of the frame are connected to the outer edge of the lens frame (13) of the frame.
  • the lens (2) is inserted into the frame in the lens frame (13) from the light exit side.
  • the dome-shaped bulge (3) of the frame is created by deep-drawing the surface area within the lens frame (13).
  • the diameter of the outer edge of the dome-shaped bulge (3) is slightly smaller than the outer diameter of the lens.
  • the contact surface is then formed by a circular ring surface (15) which is offset in a stepped manner towards the reflector (1).
  • a cutout which extends into the side walls of the frame (11), is cut out from the upper and lower edge of the opening (14) receiving the light bulb (5).
  • the back of the lens lies against the circular surface (15).
  • the first and second retaining tabs (16 and 17) formed on the outer edge of the surface (13) are then bent with their free end towards the lens center.
  • the free end of the first retaining tab lies against the edge of the lens under prestress and is held in this position by the second retaining tab (17) cut free from the first retaining tab (16), that is to say that the first retaining tab cannot after bending spring back.
  • a rattle-free tight fit of the lens (2) in the frame (11) is thus ensured.

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

Description

Die Erfindung bezieht sich auf einen Fahrzeugscheinwerfer mit den Merkmalen nach dem Oberbegriff des Anspruchs 1.The invention relates to a vehicle headlight with the features according to the preamble of claim 1.

Bei einem solchen aus der DE-PS 35 16 812 bekannten Scheinwerfer wird das Gestell von einem im Tiefziehverfahren hergestellten becherförmigen Blechteil gebildet. Die an dem Reflektor befestigten Arme des Gestells sind aus der die Mantelfläche bildenden Wandung des becherförmigen Blechteils freigeschnitten. Ein weiterer aus dieser Wandung freigeschnittener Arm weist einen zur optischen hin abgewinkelten Endabschnitt auf, welcher als Blende dient. Aus dem Boden des becherförmigen Blechteils ist eine Öffnung ausgeschnitten, deren sie umgebender und bis zu den Armen sich erstreckender Randbereich der Linsenrahmen ist. Die Auflagefläche für die von der Unterseite des becherförmigen Gestells in den Linsenrahmen eingesetzte Linse sind die freien Enden von Zungen, welche aus dem Linsenrahmen freigeschnitten und radial nach innen gebogen sind. Damit die Auflageflächen genau in einer vertikal zur optischen Achse stehenden Ebene liegen, ist es notwendig, die freien Enden der Zungen durch einen zusätzlichen Arbeitsgang, wie z. B. durch Abschneiden, nachgearbeitet werden müssen. Außerdem können die Zungen nur durch verstellbare Werkzeugteile hergestellt werden. Ferner ist es wegen großen Toleranzen bei Blechteilen notwendig, die Blende um ihre senkrecht zur optischen Achse verlaufende Biegelinie so weit zu verstellen, bis ihre Blendenkante genau im Brennort der Sammellinse liegt. Um ein Zurückfedern der Blende zu vermeiden und eine feste Lage der Blende zu erhalten, wird die Blende nach ihrem Einjustieren an ihren benachbarten Armen des Gestells durch einen zusätzlichen Arbeitsgang, wie z. B. Laserschweißen, festgesetzt. (siehe hierzu die DE-PS 35 16 812).In such a headlight known from DE-PS 35 16 812, the frame is formed by a cup-shaped sheet metal part produced in the deep-drawing process. The arms of the frame attached to the reflector are cut free from the wall of the cup-shaped sheet metal part forming the lateral surface. Another arm cut free from this wall has an end section which is angled towards the optical and which serves as a diaphragm. An opening is cut out of the bottom of the cup-shaped sheet metal part, the peripheral region of which is the lens frame, which surrounds it and extends to the arms. The contact surface for the lens inserted into the lens frame from the underside of the cup-shaped frame is the free ends of tongues, which are cut free from the lens frame and bent radially inwards. So that the bearing surfaces are exactly in a vertical plane to the optical axis, it is necessary to remove the free ends of the tongues by an additional operation such. B. by cutting, need to be reworked. In addition, the tongues can only be made using adjustable tool parts. Furthermore, because of large tolerances in sheet metal parts, it is necessary to adjust the aperture around its bending line perpendicular to the optical axis until its aperture edge lies exactly in the focal point of the converging lens. In order to avoid springing back of the panel and to maintain a fixed position of the panel, the panel is adjusted by an additional operation, such as. B. laser welding. (See DE-PS 35 16 812).

Bei einem aus der DE-PS 35 29 546 bekannten Scheinwerfer ist die Linse zwischen den Armen des Gestells in den Linsenrahmen eingesetzt und liegt an einer dem Reflektor zugewandten kreisringförmigen Auflagefläche des Linsenrahmens auf. Weiterhin ist zwischen den Armen des Gestells die Blende eingesetzt und an dem Linsenrahmen befestigt. Eine solche Montage der Linse und Blende ist umständlich und zeitaufwendig. Die Blende ist aus einem Blechstreifen hergestellt, welcher um eine unendliche Vielzahl von quer zu seiner Längsausdehnung verlaufenden Biegelinien zu einem halbkreisförmigen Bogen geformt ist. Da ein solcher Bogen mit seinen Endabschnitten in einem unterschiedlichen Maß auffedern kann, besteht für den Abstand zwischen dem mittleren Bereich der Blendenkante und der Auflagefläche für die Linse ein relativ großer Toleranzbereich. Somit ist hierbei nicht sicher gewährleistet, daß der mittlere Bereich der Blendenkante genau im Brennort der Linse liegt. Nur in diesem Fall ist die Hell-Dunkel-Grenze scharf abgebildet.In a headlight known from DE-PS 35 29 546, the lens is inserted between the arms of the frame in the lens frame and rests on an annular support surface of the lens frame facing the reflector. Furthermore, the screen is inserted between the arms of the frame and attached to the lens frame. Such assembly of the lens and aperture is cumbersome and time consuming. The diaphragm is made from a sheet metal strip, which is formed into a semicircular arc around an infinite number of bending lines running transversely to its longitudinal extent. Since such an arch can spring up with its end sections to a different degree, there is a relatively large tolerance range for the distance between the central region of the diaphragm edge and the contact surface for the lens. This does not guarantee that the central area of the diaphragm edge is exactly in the focal point of the lens. Only in this case is the cut-off line clearly shown.

Aufgabe der Erfindung ist es, den im Oberbegriff des Anspruchs 1 beschriebenen Scheinwerfer derart zu verbessern, daß der Abstand zwischen der die Hell-Dunkel-Grenze erzeugenden Blendenkante ein festes, nicht veränderbares Maß ist, was am sichersten dadurch gewährleistet ist, daß dieses Abstandsmaß durch den Abstand von Werkzeugteilen vorgegeben ist, die innerhalb einer Werkzeughälfte angeordnet sind. Darüber hinaus soll die Linse weiterhin von vorn, d. h. auch nach der Montage des Gestells mit dem Reflektor leicht auf den Linsenrahmen aufgesetzt werden können und die Blende ohne zusätzliche Befestigungsmittel in sich sehr steif sein.The object of the invention is to improve the headlights described in the preamble of claim 1 such that the distance between the diaphragm edge generating the light-dark boundary is a fixed, unchangeable dimension, which is most safely ensured by this distance dimension the distance from tool parts is specified, which are arranged within a tool half. In addition, the lens should continue from the front, i. H. even after installing the frame with the reflector can be easily placed on the lens frame and the screen can be very rigid in itself without additional fasteners.

Diese Aufgabe wird nach der Erfindung durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in the characterizing part of claim 1.

Bei einer solchen sehr einfachen Lösung kann die kalottenförmige Ausbauchung im Tiefziehverfahren hergestellt werden.With such a very simple solution, the dome-shaped bulge can be produced using the deep-drawing process.

Weiterhin ist es vorteilhaft, wenn die Öffnung von dem gesamten oberhalb der Blendenkante ausgeschnittenen Bereich der kalottenförmigen Ausbauchung gebildet ist. Hierbei sind sämtliche durch die Öffnung hindurchgehende Lichtstrahlen nicht nach oben gerichtet und können somit nicht den Gegenverkehr blenden. Außerdem verkleinert sich die Masse in dem die relativ schwere Linse tragenden Bereich des Gestells.It is also advantageous if the opening is formed by the entire region of the dome-shaped bulge cut out above the diaphragm edge. Here, all light rays passing through the opening are not directed upwards and therefore cannot dazzle oncoming traffic. In addition, the mass decreases in the area of the frame that carries the relatively heavy lens.

Vorteilhaft ist es weiterhin, wenn die kreisringförmige Auflagefläche für die Linse durch eine umlaufende Stufe im Linsenrahmen zum Reflektor hin versetzt verläuft. Dadurch ist nicht nur die Linse in ihrer radialen Richtung fixiert, sondern es ist auch die Lage der Blendenkante zur Linse hin sehr genau, da die stufenförmig versetzte Kreisringfläche zusammen mit der kalottenförmigen Ausbauchung aus dem die Linse aufnehmenden mittleren Bereich der Fläche des Gestells herausgezogen werden kann.It is also advantageous if the annular contact surface for the lens runs offset from the reflector by a circumferential step in the lens frame. As a result, not only is the lens fixed in its radial direction, but the position of the diaphragm edge towards the lens is also very precise, since the stepped circular ring surface together with the dome-shaped bulge can be pulled out of the central area of the frame receiving the lens .

Bei einer kalottenförmigen Ausbauchung, welche in ihrer oberen Hälfte nur eine ausgestanzte Öffnung aufweist, ist es weiterhin vorteilhaft, daß die Blende und das Gestell auf den dem Reflektor zugewandten Seiten keine Schwärzung aufweisen müssen, um Licht zu absorbieren. Eine Schwärzung dieser Seiten ist nicht notwendig, da unterhalb der Blendenkante sämtliche Lichtstrahlen der Glühlampe von der Blende und dem Gestell nach außen hin abgeschirmt sind und die auf die kalottenförmige Blende auftreffenden Lichtstrahlen in Richtung auf den Reflektor diffus gestreut werden und somit den Gegenverkehr nicht blenden können.In the case of a dome-shaped bulge which has only one punched-out opening in its upper half, it is also advantageous that the screen and the frame do not have to have any blackening on the sides facing the reflector in order to absorb light. A blackening of these sides is not necessary, since all light rays of the incandescent lamp are shielded from the aperture and the frame to the outside below the edge of the aperture and the light rays striking the dome-shaped aperture are diffusely scattered in the direction of the reflector and therefore cannot dazzle oncoming traffic .

Bei einer anderen vorteilhaften Weiterbildung der Erfindung weist die untere Hälfte der kalottenförmigen Ausbauchung des Gestells eine ausgestanzte Öffnung auf. Bei einer solchen Lösung kann sich die Luft zwischen Blende und Linse nicht so stark aufheizen und somit erwärmen sich auch die Befestigungsstellen zwischen dem Gestell und dem Reflektor nicht so stark. Dies ist besonders bei einem aus Kunststoff hergestellten Reflektor wichtig.In another advantageous development of the invention, the lower half of the dome-shaped bulge of the frame has a punched-out opening. With one Solution, the air between the diaphragm and the lens cannot heat up as much and therefore the fastening points between the frame and the reflector do not heat up as much. This is particularly important with a reflector made of plastic.

In der Zeichnung ist ein abgeblendeter Fahrzeugscheinwerfer mit einem nach einem erfindungsgemäßen Verfahren hergestellten Gestell dargestellt und zwar zeigt

  • Figur 1 einen vertikalen Längsschnitt entlang der optischen Achse durch die von Linse, Blende und Reflektor gebildete optische Einheit des Scheinwerfers und
  • Figur 2 eine perspektivische Ansicht des mit der Blende einteilig hergestellten Gestells.
The drawing shows a dimmed vehicle headlight with a frame produced by a method according to the invention and shows
  • Figure 1 is a vertical longitudinal section along the optical axis through the optical unit formed by the lens, aperture and reflector of the headlamp and
  • Figure 2 is a perspective view of the frame made in one piece with the panel.

In der Zeichnung ist ein abgeblendeter Fahrzeugscheinwerfer dargestellt, der im wesentlichen aus einem ellipsoidförmigen Reflektor (1) und einer zwischen der konvexen Linse (2) und dem Reflektor (1) angeordneten Blende (3) besteht. Die innenliegende Reflektionsfläche des Reflektors (1) bildet in den axialen Längsschnitten jeweils eine Halbellipse. In dem Brennpunkt der Halbellipsen ist der Glühfaden (4) der Glühlampe (5) angeordnet. Die die Hell-Dunkelgrenze erzeugende Blendenkante (6) der Blende (3) ist im Brennort der Linse (2) angeordnet. Der ellipsoidförmige Reflektor (1) weist am Scheitel eine Öffnung (7) zur Aufnahme einer kreisringförmigen Lampenfassung (8) auf. Von der Rückseite des Reflektors her ist in die Lampenfassung die Glühlampe (5) eingesetzt und wird durch die Drahtfeder (9) mit ihrem radial nach außen vorspringenden Flansch gegen die Außenseite der Lampenfassung (8) gedrückt. Auf die Lampenfassung (8) ist eine aus Gummi bestehende Kappe (10) aufgesetzt.The drawing shows a dimmed vehicle headlight which essentially consists of an ellipsoidal reflector (1) and an aperture (3) arranged between the convex lens (2) and the reflector (1). The internal reflection surface of the reflector (1) forms a semi-ellipse in the axial longitudinal sections. The filament (4) of the incandescent lamp (5) is arranged in the focal point of the semi-ellipses. The diaphragm edge (6) of the diaphragm (3) which produces the light-dark boundary is arranged in the focal point of the lens (2). The ellipsoidal reflector (1) has an opening (7) on the apex for receiving an annular lamp holder (8). The incandescent lamp (5) is inserted into the lamp holder from the rear of the reflector and is pressed against the outside of the lamp holder (8) by the wire spring (9) with its flange projecting radially outwards. A rubber cap (10) is placed on the lamp holder (8).

Die Blende (3) ist mit einem aus Blech bestehenden Gestell (11) einteilig hergestellt, dessen Arme (12) fest mit dem Randbereich des Reflektors (1) verbunden sind. Die Arme (12) des Gestells sind an den äußeren Rand des Linsenrahmens (13) des Gestells angebunden. In den Linsenrahmen (13) ist von der Lichtaustrittsseite her in das Gestell die Linse (2) eingesetzt. Die kalottenförmige Ausbauchung (3) des Gestells entsteht durch Tiefziehen des innerhalb des Linsenrahmens (13) liegenden Flächenbereichs. Der äußere Rand der kalottenförmigen Ausbauchung (3) ist dabei in seinem Durchmesser etwas kleiner als der Außendurchmesser der Linse. Beim Tiefziehen der Blende (3) wird gleichzeitig die Auflagefläche der Linse (2) in Richtung auf den Reflektor hin gezogen. Die Auflagefläche wird dann von einer stufenförmig zum Reflektor (1) hin versetzt liegenden Kreisringfläche (15) gebildet. Aus dem oberen und unteren Rand der die Glühlampe (5) aufnehmenden Öffnung (14) ist jeweils eine sich bis in die Seitenwandungen des Gestells (11) sich erstreckende Aussparung ausgeschnitten.The diaphragm (3) is made in one piece with a frame (11) made of sheet metal, the arms (12) of which are firmly connected to the edge region of the reflector (1). The arms (12) of the frame are connected to the outer edge of the lens frame (13) of the frame. The lens (2) is inserted into the frame in the lens frame (13) from the light exit side. The dome-shaped bulge (3) of the frame is created by deep-drawing the surface area within the lens frame (13). The diameter of the outer edge of the dome-shaped bulge (3) is slightly smaller than the outer diameter of the lens. When the diaphragm (3) is deep-drawn, the contact surface of the lens (2) is pulled towards the reflector. The contact surface is then formed by a circular ring surface (15) which is offset in a stepped manner towards the reflector (1). A cutout, which extends into the side walls of the frame (11), is cut out from the upper and lower edge of the opening (14) receiving the light bulb (5).

Nach dem Einsetzen der Linse (2) in das Gestell (11) von der Lichtaustrittsseite her, liegt die Linse mit ihrer Rückseite an der Kreisringfläche (15) an. Danach werden die an den äußeren Rand der Fläche (13) angeformten ersten und zweiten Haltelappen (16 bzw. 17) mit ihrem freien Ende zum Linsenzentrum hin zuneigend gebogen. Dabei liegt der erste Haltelappen mit seinem freien Ende an dem Rand der Linse unter Vorspannung an und wird durch den aus dem ersten Haltelappen (16) freigeschnittenen zweiten Haltelappen (17) in dieser Position gehalten, das heißt, der erste Haltelappen kann nach einem Umbiegen nicht zurückfedern. Somit ist ein klapperfreier Festsitz der Linse (2) in dem Gestell (11) gewährleistet.After inserting the lens (2) into the frame (11) from the light exit side, the back of the lens lies against the circular surface (15). The first and second retaining tabs (16 and 17) formed on the outer edge of the surface (13) are then bent with their free end towards the lens center. The free end of the first retaining tab lies against the edge of the lens under prestress and is held in this position by the second retaining tab (17) cut free from the first retaining tab (16), that is to say that the first retaining tab cannot after bending spring back. A rattle-free tight fit of the lens (2) in the frame (11) is thus ensured.

Claims (5)

  1. Dipped vehicle headlamp comprising the following:
    - an ellipsoidal reflector (1),
    - a light source (4) arranged at the inner focus of the reflector (1),
    - a lens (2) set in a lens mount (13) of a frame (11) of sheet metal, of which the arms (12) attached to the outer rim of the lens mount (13) are fixed to the reflector (1),
    - a diaphragm (3) manufactured in one piece with the frame (11) and of which the diaphragm edge (6) arranged at the inner focus of the lens (2) produces the light/dark boundary of the beam of light emerging from the headlamp,
    characterised in that
    - the diaphragm (3) is constituted by a cap-shaped bulging portion directed towards the light source (4) and pressed out of the surface region of the frame (11) that is situated within the lens frame (13),
    - the diaphragm rim (6) is constituted by the rim of a punched-out opening (14) in the upper half of the cap-shaped bulging portion (3),
    - the rim of the cap-shaped bulging portion (3) is at least slightly smaller in diameter than the outer diameter of the lens (2),
    - the radius of the cap-shaped bulging portion (3) is large enough that at least the middle region of the diaphragm rim (6) is at the focus of the lens (2),
    - the lens (2) is supported on one annular face (15) of the lens mount (13) that is remote from the reflector (1).
  2. Dipped vehicle headlamp according to claim 1, characterised in that the opening is constituted by the entire region of the cap-shaped bulging portion (3) cut out above the diaphragm rim (6).
  3. Dipped vehicle headlamp according to claim 1 or 2, characterised in that the annular supporting surface (15) for the lens (2) is offset towards the reflector (1) by an all-round step in the lens mount (13).
  4. Dipped vehicle headlamp according to any of claims 1 to 3, characterised in that the lower half of the cap-shaped bulging portion of the frame incorporates a punched-out opening.
  5. Dipped vehicle headlamp according to claim 1, characterised in that the opening (14) in the cap-shaped bulging portion (3) of the frame (11) is in the form of a slot.
EP89114441A 1988-08-13 1989-08-04 Dipped vehicle headlamp Expired - Lifetime EP0355528B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3827594 1988-08-13
DE3827594A DE3827594A1 (en) 1988-08-13 1988-08-13 METHOD FOR PRODUCING AND MANUFACTURED FRAME FOR A VEHICLE HEADLAMP USING THE PROJECTION METHOD

Publications (3)

Publication Number Publication Date
EP0355528A2 EP0355528A2 (en) 1990-02-28
EP0355528A3 EP0355528A3 (en) 1990-12-19
EP0355528B1 true EP0355528B1 (en) 1994-02-16

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Application Number Title Priority Date Filing Date
EP89114441A Expired - Lifetime EP0355528B1 (en) 1988-08-13 1989-08-04 Dipped vehicle headlamp

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US (1) US4922386A (en)
EP (1) EP0355528B1 (en)
DD (1) DD284080A5 (en)
DE (2) DE3827594A1 (en)
ES (1) ES2049282T3 (en)

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Also Published As

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EP0355528A3 (en) 1990-12-19
ES2049282T3 (en) 1994-04-16
DE3827594A1 (en) 1990-02-15
DE58906974D1 (en) 1994-03-24
DE3827594C2 (en) 1991-10-24
DD284080A5 (en) 1990-10-31
US4922386A (en) 1990-05-01
EP0355528A2 (en) 1990-02-28

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