EP0208895B1 - Dipped beam head light or fog light for motor vehicles - Google Patents

Dipped beam head light or fog light for motor vehicles Download PDF

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Publication number
EP0208895B1
EP0208895B1 EP86107589A EP86107589A EP0208895B1 EP 0208895 B1 EP0208895 B1 EP 0208895B1 EP 86107589 A EP86107589 A EP 86107589A EP 86107589 A EP86107589 A EP 86107589A EP 0208895 B1 EP0208895 B1 EP 0208895B1
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EP
European Patent Office
Prior art keywords
reflector
light
headlight according
beams
optical means
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
EP86107589A
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German (de)
French (fr)
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EP0208895A2 (en
EP0208895A3 (en
Inventor
Heinz Kretschmer
Gerhard Dipl.-Ing. Lindae
Ernst Merkl
Peter Perthus
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0208895A2 publication Critical patent/EP0208895A2/en
Publication of EP0208895A3 publication Critical patent/EP0208895A3/en
Application granted granted Critical
Publication of EP0208895B1 publication Critical patent/EP0208895B1/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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas

Definitions

  • the invention relates to a headlight for low beam or fog light of motor vehicles according to the preamble of claim 1.
  • Such a headlight is known from DE-OS 24 25 336, in which two side reflectors and the lens are required to form the additional light beam. The adjustment of the side reflectors and the superimposition of the light beam by the additional light beam cause increased mechanical and optical effort.
  • Such a headlamp is also known from DE 32 18 703 A1, in which only the direct rays (not reflected by the reflector) are used for the generation of the additional light beam, which rays pass through two prismatic lenses arranged on the side of the objective; the light intensity the direct rays are often inadequate and the horizontal extension of both prismatic lenses, which is a multiple of that of the lens, increases the lateral extension of the headlamp.
  • Claim 2 uses that region of the reflector for the formation of the additional light beam, the reflected rays of which are shielded by the diaphragm.
  • Claim 3 shows a way of an easily producible optical means.
  • FIG. 1 shows a headlamp for low beam or fog light of motor vehicles in vertical section in a non-scale, schematic representation
  • FIG. 2 shows a variant of the reflection section generating the additional light beam in viewing direction II in FIG. 1 in a greatly enlarged illustration.
  • a headlight for low beam or fog light of motor vehicles has an overall reflector 10, which a reflector 11 and a reflector cutout 12 essentially form.
  • the vertical and horizontal meridian section of the reflector 11 are higher-order curves, in particular ellipses or parabolas.
  • an incandescent lamp 14 is inserted, the filament (light source) 15 of which lies in the region of the optical axis 16 of the headlight, but is slightly offset with respect to the focal point 17 of the reflector cutout 12.
  • the reflector cutout 12 is part of a paraboloid and is attached to the reflector 11 in the lower region of the overall reflector 10.
  • an aperture 19 is arranged below the axis 16, the edge 20 of which forms the light-dark boundary of the light beam of the low beam or fog light illuminating the roadway.
  • an objective 21 is arranged in front of it, which projects the light onto the road.
  • the inclination and sweep (lateral inclination) essentially determines the front part of the motor vehicle body.
  • horizontally scattering means such as prisms 23 are arranged.
  • the three light beams 18 reflected by the reflector 11 pass through the lens 21 and form the light bundle that illuminates the road and complies with the legislation.
  • the reflector cutout 12, which is designed as part of a paraboloid, reflects the rays 24 below the aperture 19 and the objective 21, as a result of which an additional light beam is formed which effects the illumination of both the apron and the side illumination, ie the illumination of the road edges. These rays 24 are ineffective for the formation of the light beam and do not fall through the lens 21.
  • the horizontally scattering means 23 are not required if the reflector cutout 12 'is part of a paraboloid ellipsoid, the vertical meridian section of which is part of a parabola and the horizontal meridian section of which is part of an ellipsoid, because this alone achieves the desired side illumination.
  • the reflector cutout in FIG. 2 consists of a left and right side part 32, 33 (continuous line), which result from the fact that the original reflector cutout 12 (dashed line) is separated into a left side part 32 and a right side part 33 by a vertical central plane 30 ; both side parts are pivoted about a vertical pivot axis 31 which passes through the light source 15 (FIG. 1) such that the optical axis 32 'of the left side part 32 points to the right, the optical axis 33' of the right side part 33 points to the left, each with respect to the vertical center plane 30.

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

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen nach der Gattung des Anspruchs 1. Mit dem Zusatzlichtbündel erreicht man die Beleuchtung des Vorfeldes, d. h. den Bereich der Fahrbahn vor dem Krafrfahrzeug, und der beiden Fahrbahnräder, wodurch sich für den Fahrzeuglenker eine Verbesserung der Seitenorientierung ergibt.The invention relates to a headlight for low beam or fog light of motor vehicles according to the preamble of claim 1. With the additional light beam you can achieve the lighting of the apron, d. H. the area of the road in front of the vehicle, and the two road wheels, which results in an improvement in the lateral orientation for the vehicle driver.

Ein derartiger Scheinwerfer ist aus der DE-OS 24 25 336 bekannt, bei dem zur Bildung des Zusatzlichtbündels zwei Seitenreflektoren und das Objektiv erforderlich sind. Die Einstellung der Seitenreflektoren und die Überlagerung des Lichtbündels durch das Zusatzlichtbündel verursachen erhöhten mechanischen und optischen Aufwand. Ein derartiger Scheinwerfer ist auch aus der DE 32 18 703 A1 bekannt, bei dem für die Erzeugung des Zusatzlichtbündels nur die direkten (vom Reflektor nicht reflektierten) Strahlen verwendet werden, die durch zwei seitlich des Objektivs angeordnete Prismenscheiben hindurchtreten; die Lichtstärke der direkten Strahlen dürfte vielfach unzureichend sein und die Horizontalausdehnung beider Prismenscheiben, die ein Vielfaches der des Objektivs ist, vergrößert die seitliche Ausdehnung des Scheinwerfers.Such a headlight is known from DE-OS 24 25 336, in which two side reflectors and the lens are required to form the additional light beam. The adjustment of the side reflectors and the superimposition of the light beam by the additional light beam cause increased mechanical and optical effort. Such a headlamp is also known from DE 32 18 703 A1, in which only the direct rays (not reflected by the reflector) are used for the generation of the additional light beam, which rays pass through two prismatic lenses arranged on the side of the objective; the light intensity the direct rays are often inadequate and the horizontal extension of both prismatic lenses, which is a multiple of that of the lens, increases the lateral extension of the headlamp.

Vorteile der ErfindungAdvantages of the invention

Mit dem Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen nach dem Anspruch 1 werden die im vorerwähnten Stand der Technik aufgezeigten technischen und optischen Unzulänglichkeiten in einfacher Weise behoben.With the headlamp for low beam or fog light of motor vehicles according to claim 1, the technical and optical deficiencies shown in the aforementioned prior art are easily remedied.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Mit Anspruch 2 wird derjenige Bereich des Reflektors für die Bildung des Zusatzlichtbündels herangezogen, dessen reflektierten Strahlen durch die Blende abgeschirmt werden. Mit Anspruch 3 ist ein Weg eines einfach herstellbaren optischen Mittels gewiesen.Advantageous developments of the invention are described in the subclaims. Claim 2 uses that region of the reflector for the formation of the additional light beam, the reflected rays of which are shielded by the diaphragm. Claim 3 shows a way of an easily producible optical means.

Mit der Weiterbildung der Erfindung gemäß Anspruch 4 erreicht man eine den linken und rechten Fahrbahnrand angepaßte Beleuchtung. Mit Anspruch 5 wird das Zusatzlichtbündel bereits durch den Reflexionsausschnitt erzeugt.With the development of the invention according to claim 4 one achieves the left and right edge of the road lighting. With claim 5, the additional light beam is already generated by the reflection cutout.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der Figurenbeschreibung näher erläutert. Es zeigen: Figur 1 einen Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen in Vertikalschnitt in nichtmaßstäblicher, schematischer Darstellung; und Figur 2 eine Variante des das Zusatzlichtbündel erzeugenden Reflexionsabschnittes in Blickrichtung II in Figur 1 in stark vergrößerter Darstellung.An embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures. FIG. 1 shows a headlamp for low beam or fog light of motor vehicles in vertical section in a non-scale, schematic representation; and FIG. 2 shows a variant of the reflection section generating the additional light beam in viewing direction II in FIG. 1 in a greatly enlarged illustration.

Beschreibung des AusführungsbeispielesDescription of the embodiment

Ein Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen hat einen Gesamtreflektor 10, den ein Reflektor 11 und ein Reflektorausschnitt 12 im wesentlichen bilden. Der vertikale und horizontale Meridianschnitt des Reflektors 11 sind Kurven höherer Ordnung, insbesondere Ellipsen oder Parabeln. In einer Scheitelöffnung 13 des Reflektors 11 ist eine Glühlampe 14 eingesetzt, deren Glühfaden (Lichtquelle) 15 im Bereich der optischen Achse 16 des Scheinwerfers liegt, jedoch bezüglich des Brennpunktes 17 des Reflektorausschnittes 12 geringfügig versetzt ist. Der Reflektorausschnitt 12 ist Teil eines Paraboloides und im unteren Bereich des Gesamtreflektors 10 am Reflektor 11 angesetzt.A headlight for low beam or fog light of motor vehicles has an overall reflector 10, which a reflector 11 and a reflector cutout 12 essentially form. The vertical and horizontal meridian section of the reflector 11 are higher-order curves, in particular ellipses or parabolas. In an apex opening 13 of the reflector 11, an incandescent lamp 14 is inserted, the filament (light source) 15 of which lies in the region of the optical axis 16 of the headlight, but is slightly offset with respect to the focal point 17 of the reflector cutout 12. The reflector cutout 12 is part of a paraboloid and is attached to the reflector 11 in the lower region of the overall reflector 10.

Im Strahlengang der vom Reflektor 11 reflektierten Strahlen 18 ist unterhalb der Achse 16 eine Blende 19 angeordnet, deren Kante 20 die Helldunkelgrenze des die Fahrbahn ausleuchtenden Lichtbündels des Abblendlichtes oder Nebellichtes bildet. Im Strahlengang der von der Blende 19 beeinflußten Strahlen ist vor dieser ein Objektiv 21 angeordnet, welches das Licht auf die Fahrbahn projiziert.In the beam path of the rays 18 reflected by the reflector 11, an aperture 19 is arranged below the axis 16, the edge 20 of which forms the light-dark boundary of the light beam of the low beam or fog light illuminating the roadway. In the beam path of the rays influenced by the aperture 19, an objective 21 is arranged in front of it, which projects the light onto the road.

Im Strahlengang vor dem Objektiv 21 ist eine transparente Lichtscheibe 22, deren Neigung und Pfeilung (seitliche Neigung) im wesentlichen die Frontpartie der Kraftfahrzeug-Karosserie bestimmt. Im unteren Bereich und an der Innenseite der Lichtscheibe 22 sind horizontal streuende Mittel wie beispielsweise Prismen 23 angeordnet.In the beam path in front of the lens 21 is a transparent lens 22, the inclination and sweep (lateral inclination) essentially determines the front part of the motor vehicle body. In the lower area and on the inside of the lens 22, horizontally scattering means such as prisms 23 are arranged.

Die drei vom Reflektor 11 reflektierten Lichtstrahlen 18 fallen durch das Objektiv 21 und bilden das der Gesetzgebung entsprechende, die Fahrbahn ausleuchtende Lichtbündel. Der als Teil eines Paraboloides ausgeführte Reflektorausschnitt 12 reflektiert die Strahlen 24 unterhalb der Blende 19 und des Objektivs 21, wodurch ein Zusatzlichtbündel gebildet wird, das die Ausleuchtung sowohl des Vorfeldes als auch die Seitenausleuchtung, d. h. die Beleuchtung der Fahrbahnrändern bewirkt. Diese Strahlen 24 sind für die Bildung des Lichtbündels unwirksam und fallen nicht durch das Objektiv 21.The three light beams 18 reflected by the reflector 11 pass through the lens 21 and form the light bundle that illuminates the road and complies with the legislation. The reflector cutout 12, which is designed as part of a paraboloid, reflects the rays 24 below the aperture 19 and the objective 21, as a result of which an additional light beam is formed which effects the illumination of both the apron and the side illumination, ie the illumination of the road edges. These rays 24 are ineffective for the formation of the light beam and do not fall through the lens 21.

Alternativ hierzu sind die horizontalstreuenden Mittel 23 dann nicht erforderlich, wenn der Reflektorausschnitt 12' Teil eines Paraboloid-Ellipsoides ist, dessen vertikaler Meridianschnitt Teil einer Parabel und dessen horizontaler Meridianschnitt Teil eines Ellipsoides ist, weil allein hierdurch die gewünschte Seitenausleuchtung erreicht wird.As an alternative to this, the horizontally scattering means 23 are not required if the reflector cutout 12 'is part of a paraboloid ellipsoid, the vertical meridian section of which is part of a parabola and the horizontal meridian section of which is part of an ellipsoid, because this alone achieves the desired side illumination.

Der Reflektorausschnitt in Figur 2 besteht aus einem linken und rechten Seitenteil 32, 33 (durchgehende Linie), die dadurch entstehen, daß der ursprüngliche Reflektorausschnitt 12 (strichlierte Linie) durch eine vertikale Mittelebene 30 in einen linken Seitenteil 32 und einen rechten Seitenteil 33 getrennt wird; beide Seitenteile werden um eine vertikale Schwenkachse 31, die durch die Lichtquelle 15 (Figur 1) hindurchgeht, derart geschwenkt, daß die optische Achse 32' des linken Seitenteils 32 nach rechts weist, die optische Achse 33' des rechten Seitenteils 33 nach links weist, und zwar jeweils bezüglich der vertikalen Mittelebene 30.The reflector cutout in FIG. 2 consists of a left and right side part 32, 33 (continuous line), which result from the fact that the original reflector cutout 12 (dashed line) is separated into a left side part 32 and a right side part 33 by a vertical central plane 30 ; both side parts are pivoted about a vertical pivot axis 31 which passes through the light source 15 (FIG. 1) such that the optical axis 32 'of the left side part 32 points to the right, the optical axis 33' of the right side part 33 points to the left, each with respect to the vertical center plane 30.

Claims (6)

  1. Dipped beam headlight or fog light for motor vehicles, comprising a reflector which reflects the beams of a light source and whose vertical and horizontal meridian section are curves of higher order, and comprising a shield in the beam path of the reflected light beams for the formation of the low-beam cut-off of the light bundle, and comprising a lens in the beam path of the beams influenced by the shield for the formation of the light bundle emitted onto the roadway, and comprising optical means for producing an additional light bundle which widens the light bundle and illuminates the foreground and the sides, the optical means acquiring only light beams which are not directed onto the lens by the reflector, characterised in that the optical means reflect and are arranged in the lower and/or upper region of the reflector (11).
  2. Headlight according to Claim 1, characterised in that the optical means are at least one reflector segment (12) in the lower region of the reflector (11).
  3. Headlight according to Claim 2, characterised in that the reflector segment (12) is part of a paraboloid.
  4. Headlight according to Claim 2 or 3, characterised in that the reflector segment consists of at least one left-hand and one right-hand lateral part (32, 33), and in that the optical axis (32') of the left-hand lateral part (32) is swivelled preferably to the right and that (33') of the right-hand lateral part (33) is swivelled to the left about a vertical swivel axis (31), which passes through the light source (15).
  5. Headlight according to Claim 4, characterised in that the reflector segment (12') is part of a paraboloid ellipsoid whose vertical meridian section is part of a parabola and whose horizontal meridian section is part of an ellipsoid.
  6. Headlight according to one of Claims 1 to 3, characterised in that horizontally scattering means are arranged in the beam path of the additional light bundle (24).
EP86107589A 1985-07-13 1986-06-04 Dipped beam head light or fog light for motor vehicles Expired - Lifetime EP0208895B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3525041 1985-07-13
DE3525041A DE3525041C2 (en) 1985-07-13 1985-07-13 Low beam or fog lights for motor vehicles

Publications (3)

Publication Number Publication Date
EP0208895A2 EP0208895A2 (en) 1987-01-21
EP0208895A3 EP0208895A3 (en) 1989-03-22
EP0208895B1 true EP0208895B1 (en) 1992-09-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107589A Expired - Lifetime EP0208895B1 (en) 1985-07-13 1986-06-04 Dipped beam head light or fog light for motor vehicles

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US (1) US4772987A (en)
EP (1) EP0208895B1 (en)
JP (1) JPH0789447B2 (en)
DE (2) DE3525041C2 (en)

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Also Published As

Publication number Publication date
US4772987A (en) 1988-09-20
JPS6215701A (en) 1987-01-24
DE3525041C2 (en) 1994-06-16
EP0208895A2 (en) 1987-01-21
JPH0789447B2 (en) 1995-09-27
DE3525041A1 (en) 1987-01-15
EP0208895A3 (en) 1989-03-22
DE3686748D1 (en) 1992-10-22

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