EP0381851B1 - Abgeblendeter Kraftfahrzeugscheinwerfer nach dem Projektionsprinzip - Google Patents

Abgeblendeter Kraftfahrzeugscheinwerfer nach dem Projektionsprinzip Download PDF

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Publication number
EP0381851B1
EP0381851B1 EP89123709A EP89123709A EP0381851B1 EP 0381851 B1 EP0381851 B1 EP 0381851B1 EP 89123709 A EP89123709 A EP 89123709A EP 89123709 A EP89123709 A EP 89123709A EP 0381851 B1 EP0381851 B1 EP 0381851B1
Authority
EP
European Patent Office
Prior art keywords
screen
adjustable
headlamp according
section
rim
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
EP89123709A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0381851A1 (de
Inventor
Karol Goldschmidt
Rolf Stöppelkamp
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 EP0381851A1 publication Critical patent/EP0381851A1/de
Application granted granted Critical
Publication of EP0381851B1 publication Critical patent/EP0381851B1/de
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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/686—Blades, i.e. screens moving in a vertical plane
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/62—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution for adaptation between right-hand and left-hand traffic

Definitions

  • the invention relates to a dimmed motor vehicle headlight according to the projection principle with a diaphragm arranged between the converging lens and the reflector, the first part of which forms the section of the cut-off line lying on the side of oncoming traffic and the other part of the cut-off line is horizontal Border-forming second part slopes away from the horizontal, at least the second part of the diaphragm edge being adjustable.
  • Such a headlight is known from DE-OS 34 15 867.
  • the diaphragm has two diaphragm edges that have a different line profile and can be rotated about an axis that runs horizontally in a vertical plane in two active positions. As a result, either one or the other diaphragm edge is arranged in the light beam reflected by the reflector.
  • a first diaphragm edge section which forms the section of the cut-off line lying on the side of oncoming traffic, runs horizontally and a second diaphragm edge section, which forms the other section of the cut-off line, slopes down to the horizontal.
  • the one-piece, fixed diaphragm has only one diaphragm edge running in a horizontal plane and the adjustable diaphragm can be set into an upper and a lower active position.
  • the adjustable diaphragm edge slopes away from the horizontal plane and the diaphragm edge of the fixed and adjustable diaphragm creates a cross-section that is asymmetrical in cross-section, which meets the legal requirements for low beam, while in the lower active position of the adjustable diaphragm, the asymmetry of the cross-section of the Light beam is larger, which thus better illuminates your own road side in the distance. It can be the case that after resetting the adjustable diaphragm into the upper active position, its diaphragm edge no longer occupies exactly the same position and the risk of glare is impermissibly high for oncoming traffic.
  • the diaphragm which has a horizontally running diaphragm edge section and a diaphragm edge section sloping relative to the horizontal, is made in one piece and stationary and an adjustable diaphragm with one of its diaphragm edges in an active position above and in a rest position below the horizontally running diaphragm edge section of the fixed diaphragm, but the headlamp is also not usable for left and right-hand traffic, since there is an asymmetrical dipped beam both in the active position and in the rest position of the adjustable diaphragm, the part of the light beam which is directed towards the opposite lane side, more or less far.
  • a headlight is known, the aperture of which is adjustable from a rest position to an active position. With such a headlight, it is possible to adjust the diaphragm, but it is not possible to change the course of the light-dark boundary that it depicts.
  • the diaphragm can be pivoted about an axis running parallel to the optical axis.
  • the aperture swivels around an angle corresponding to the inclination of the vehicle in a curve, so that the position of the cut-off line from the road surface does not change. After resetting the diaphragm, it is possible that the diaphragm is no longer in exactly the same position.
  • the object of the invention is to design the dimmed motor vehicle headlights described in the preamble of the revised claim 1 in such a way that in short-term and rarely occurring exceptional cases after setting a diaphragm edge in the horizontal plane, the light figure resulting from the light beam emerging from the headlights is no longer asymmetrical but instead is symmetrical, that is, the light-dark boundary runs horizontally in its entire length and nevertheless after resetting the diaphragm edge it is ensured that the light-dark boundary assumes both its original course and its original position to the road surface, that is , there is an unchanged original asymmetrical low beam.
  • the one-piece diaphragm is designed to be stationary and that in addition to this fixed diaphragm there is an adjustable diaphragm in an active and rest position, the diaphragm edge of which in the active position above and in The rest position runs below the diaphragm edge section of the fixed diaphragm, which depicts the part of the cut-off line lying on the side facing away from oncoming traffic, the adjustable diaphragm in the active position with its diaphragm edge in the direction of the optical axis being seen on the horizontally running diaphragm edge section of the fixed one Connects to the diaphragm edge and lies together with it in a horizontal plane.
  • Such a solution can be implemented retrospectively for a headlight with a fixed aperture.
  • Such retrofitting is very simple and very inexpensive to manufacture, since the adjustable aperture is essentially added to the known headlamp.
  • a headlight which, for. B. has the usual asymmetrical light distribution for right-hand traffic, there is a symmetrical light distribution after adjusting the additional aperture in its active position.
  • Such a headlight can also be used for left-hand traffic.
  • the adjustable diaphragm lies flat against the stationary diaphragm, at least in the region of its diaphragm edge. This makes it possible for both the diaphragm edge of the fixed and the adjustable diaphragm to be located approximately in the focal point of the converging lens.
  • the adjustable diaphragm can be pivoted about an axis. It is furthermore expedient if the pivot axis runs approximately parallel to the optical axis and is formed by a bore going through both diaphragms or through the stationary diaphragm and a section carrying the adjustable diaphragm and a bolt mounted in the bore.
  • the pivot axis runs approximately parallel to the optical axis and is formed by a bore going through both diaphragms or through the stationary diaphragm and a section carrying the adjustable diaphragm and a bolt mounted in the bore.
  • the free end section forming the handle of the section supporting the adjustable diaphragm is an angle lever which projects with its free end into an opening in a headlight housing in which a cover is detachably inserted.
  • the upper edge of the section carrying the adjustable diaphragm lies below the first diaphragm edge section of the stationary diaphragm. This ensures after an adjustment of the diaphragm in its active position that the portion of the light-dark boundary formed by the horizontal diaphragm edge portion of the fixed diaphragm is not influenced by the adjustable diaphragm. It is therefore not possible for oncoming traffic to be dazzled even if the adjustable diaphragm has not been reset to its rest position.
  • the adjustable diaphragm is both in the Active position and in the rest position held by a spring. An intermediate position of the diaphragm is therefore not possible. It is useful if the spring is inserted between two abutments of the fixed or adjustable diaphragm and the abutments lie approximately in a line running perpendicularly through the pivot axis and the spring in its relaxed state is longer than the distance between the two abutments, whereby the spring between its two abutments in the direction of adjustment of the diaphragm is locked on the adjustable or stationary diaphragm and there is a relative movement between the locking and the abutments when the diaphragm is rotated.
  • Such a solution is not only simple and very inexpensive to manufacture, but also very reliable.
  • the motor vehicle headlight shown in Figure 1 consists essentially of an ellipsoid reflector (1) and a fixed aperture (3) and adjustable between the converging lens (2) and the reflector (1) Cover (4).
  • the reflector has an opening (5) at the apex for receiving an incandescent lamp (6).
  • the frame (8) carrying the lens (2) is attached to the outer reflector edge (7).
  • the fixed cover (3) and the frame (8) are made in one piece from sheet metal.
  • the diaphragm edge (9) of the fixed diaphragm (3) is arranged approximately in the focal point of the converging lens and has a course which is common for a headlamp for right-hand traffic. This is because the diaphragm edge has a horizontal diaphragm edge section (10) which forms the section of the cut-off line lying on the side of oncoming traffic and a second diaphragm edge section (11) which slopes away from the horizontal and which forms the section of the light section lying on its own roadway side. Dark border forms.
  • the adjustable diaphragm (4) made of sheet metal bears against the main surface of the fixed diaphragm facing the lens (2) and running perpendicular to the optical axis.
  • the adjustable diaphragm (4) can be pivoted about an axis (12) running parallel to the optical axis into an active and a rest position.
  • the diaphragm edge (13) lies below the first diaphragm edge section (11) of the fixed diaphragm edge
  • the pivotable diaphragm (4) has its diaphragm edge (13) above the second aperture edge section (11) of the fixed aperture edge.
  • the adjustable diaphragm edge (13) adjoins the first diaphragm edge section (10) of the fixed diaphragm edge and lies with this first diaphragm edge section in a horizontal plane.
  • the pivot axis (12) runs at a distance from the adjustable diaphragm edge (13) and below the first diaphragm edge section (10) of the fixed diaphragm edge.
  • the swivel axis (12) is formed by a bore passing through the section (14) carrying the diaphragm (4) and the stationary diaphragm (3) and one into the Bore used bolt.
  • the free end section, designed as an angle lever (15), of the section carrying the diaphragm (4) serves as a handle and projects into an opening in a housing, in which a cover is detachably inserted (not shown).
  • the adjustable diaphragm is held in its rest position and active position by a leaf spring (16) which is inserted between two abutments (17) of the adjustable diaphragm (4).
  • the abutments (17) of the adjustable diaphragm (4) lie approximately on a line running perpendicularly through the swivel axis and consist of tabs cut out and bent out of the diaphragm, which are bent in a V-shape.
  • the abutments (17) face the V-shape with their open side, the linear base of the V-shape extending perpendicular to the main surface of the adjustable diaphragm (4).
  • the adjustable screen (4) has an opening (18) serving as a guide slot.
  • the length of the guide slot (18) extends on a circular arc, the center of which lies on the pivot axis (12).
  • Two tongues (19) cut out of the stationary screen (3) and bent out of it protrude through the guide slot.
  • the leaf spring (16) is arranged between the free end sections of the tongues (19) protruding from the guide slot (18). These two tongues (19) thus serve to lock the leaf spring (16) in the direction of rotation of the adjustable diaphragm (4).
  • a tab (20) is cut free from the lower edge of the adjustable panel, which is curved and so long that its free end section extends over the tongues (19) both in the active and in the rest position of the adjustable panel (4) extends.
  • the distance of the free end portion of the tab (20) to the main surface of the adjustable diaphragm (4) corresponds approximately to the width of the leaf spring (16). Since the leaf spring (16) is inserted under prestress between the abutment (17) of the adjustable diaphragm (4) and is locked between the tongues (19) of the fixed diaphragm (3), the adjustable diaphragm is secure both in its rest position and in the active position held.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Length Measuring Devices By Optical Means (AREA)
EP89123709A 1989-02-08 1989-12-22 Abgeblendeter Kraftfahrzeugscheinwerfer nach dem Projektionsprinzip Expired - Lifetime EP0381851B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3903631A DE3903631C1 (enrdf_load_stackoverflow) 1989-02-08 1989-02-08
DE3903631 1989-02-08

Publications (2)

Publication Number Publication Date
EP0381851A1 EP0381851A1 (de) 1990-08-16
EP0381851B1 true EP0381851B1 (de) 1994-09-14

Family

ID=6373593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123709A Expired - Lifetime EP0381851B1 (de) 1989-02-08 1989-12-22 Abgeblendeter Kraftfahrzeugscheinwerfer nach dem Projektionsprinzip

Country Status (3)

Country Link
EP (1) EP0381851B1 (enrdf_load_stackoverflow)
DE (1) DE3903631C1 (enrdf_load_stackoverflow)
ES (1) ES2058459T3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059903A1 (de) * 2006-12-19 2008-06-26 Hella Kgaa Hueck & Co. Projektionsscheinwerfer für Fahrzeuge

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05347101A (ja) * 1992-06-12 1993-12-27 Stanley Electric Co Ltd プロジェクタ型灯具
DE4233032A1 (de) * 1992-10-01 1994-04-07 Hella Kg Hueck & Co Scheinwerfer für Fahrzeuge
FR2721685B1 (fr) 1994-06-23 1996-09-13 Valeo Vision Projecteur automobile, en particulier à réflecteur elliptique, produisant un faisceau susceptible de deux coupures sélectivement commutables.
DE19501173A1 (de) * 1995-01-17 1996-07-18 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
DE59712677D1 (de) * 1997-08-08 2006-07-27 Hella Kgaa Hueck & Co Scheinwerfereinheit mit Blendenanordnung und Schaltvorrichtung für die Blendenanordnung
DE19858225A1 (de) * 1998-12-17 2000-06-21 Hella Kg Hueck & Co Scheinwerfer für Fahrzeuge
FR2796447B1 (fr) 1999-07-13 2001-08-17 Valeo Vision Projecteur pour vehicule automobile avec un double cache mobile
AT413752B (de) 2000-03-23 2006-05-15 Zizala Lichtsysteme Gmbh Fahrzeugscheinwerfer
FR2827945B1 (fr) 2001-07-26 2004-02-27 Valeo Vision Projecteur elliptique equipe de caches a axes de pivotement transversaux pour vehicule automobile
DE10304062A1 (de) * 2003-01-31 2004-12-23 Volkswagen Ag Scheinwerfereinrichtung für ein Kraftfahrzeug
DE10337059A1 (de) * 2003-08-12 2005-04-07 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
DE102005012303B4 (de) * 2005-03-17 2015-11-26 Automotive Lighting Reutlingen Gmbh Scheinwerfer
AT502192B1 (de) * 2006-02-13 2007-02-15 Zizala Lichtsysteme Gmbh Blendenanordnung für eine lichteinheit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1550222A (en) * 1924-03-12 1925-08-18 Moses E Newell Automobile headlight dimmer
US1761811A (en) * 1928-02-17 1930-06-03 Evan P Bone Head lamp
GB1504513A (en) * 1974-03-05 1978-03-22 Lucas Electrical Ltd Vehicle lamp unit
DE3415867A1 (de) * 1984-04-28 1985-10-31 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Abgeblendeter fahrzeugscheinwerfer mit einem schalenfoermigen reflektor
DE3528820C2 (de) * 1985-08-10 1994-02-24 Bosch Gmbh Robert Abblendlicht- oder Nebellichtscheinwerfer für Kraftfahrzeuge
DE3719638A1 (de) * 1987-06-12 1988-12-29 Bosch Gmbh Robert Abblendlichtscheinwerfer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059903A1 (de) * 2006-12-19 2008-06-26 Hella Kgaa Hueck & Co. Projektionsscheinwerfer für Fahrzeuge

Also Published As

Publication number Publication date
EP0381851A1 (de) 1990-08-16
ES2058459T3 (es) 1994-11-01
DE3903631C1 (enrdf_load_stackoverflow) 1990-07-05

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