EP1069373A1 - Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende - Google Patents

Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende Download PDF

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Publication number
EP1069373A1
EP1069373A1 EP00401849A EP00401849A EP1069373A1 EP 1069373 A1 EP1069373 A1 EP 1069373A1 EP 00401849 A EP00401849 A EP 00401849A EP 00401849 A EP00401849 A EP 00401849A EP 1069373 A1 EP1069373 A1 EP 1069373A1
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EP
European Patent Office
Prior art keywords
cover
projector
edge
projector according
light beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00401849A
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English (en)
French (fr)
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EP1069373B1 (de
Inventor
Massimo c/o Valeo Vision Di Tonno
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.)
Valeo Vision SAS
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Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1069373A1 publication Critical patent/EP1069373A1/de
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Publication of EP1069373B1 publication Critical patent/EP1069373B1/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
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • 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 present invention relates generally to projectors of the type elliptical for motor vehicles.
  • a projector of this type conventionally comprises a source luminous, an elliptical type reflector, a first focus of which is located at the near the source, a converging lens whose focal plane passes through in the vicinity of a second focus of the receiver, and a lens for closing the projector.
  • the lens may be formed by the lens itself.
  • Such a headlamp When such a headlamp is to generate a cut-off beam, such as a passing beam or anti-fog beam, it includes a cover interposed between the light source and the lens, which obscures the part of the radiation, which would otherwise spread over this cut.
  • a cut-off beam such as a passing beam or anti-fog beam
  • a difficulty of this type of projector then lies in the difficulty that there is to modify the cut profile.
  • Such modification should be considered especially when a headlamp, designed for example for a traffic direction right, must form a light beam, cut, suitable for left-hand traffic.
  • a solution, known per se, to modify the profile of the cut consists to intervene on the projector cover to modify the cut profile.
  • a projector elliptical of the type comprising a first cover provided between the reflector and the lens, which has an edge defining a first particular cutting profile for the emitted light beam, and a second cover disposed on the first cover and movable selectively between two positions, a first position in which an edge of the second cover is positioned on the path of the light rays to form with the first hides a light beam with a second particular cutoff profile, and a second position in which said edge of the second cover is substantially positioned outside the path of light rays to form a light beam with the first cut profile.
  • a solution to selectively train in a projector universal elliptical reflector a code function or a road function consists of tilt the movable cover of the projector to position it in or out of the light beam emitted.
  • an elliptical projector of the type comprising a cover tilting between a code position and a road position, around an axis generally horizontal and parallel to the optical axis.
  • the cover is pivotally mounted on a frame part of the projector, at one of its lateral sides, and the pivoting movement of the cover takes place so that it always remains in the vertical plane transverse to the axis optics where it is in the code position.
  • Such a projector has several drawbacks.
  • the light beam emitted has a reduced light intensity due to the fact that part of the cover located on the side of the axis of rotation of the latter, always remains on the path of the rays light emitted.
  • tilting cover arrangement requires the use of a bulky and powerful actuation means to ensure with the desired speed the return of the cover in the road position to the code position.
  • the present invention therefore proposes a new universal projector for elliptical type capable of selectively performing several functions, the code function for right-hand or left-hand traffic, the fog light function and the road function, that is to say to selectively generate a cut-off beam for traffic on the right or left-hand traffic or fog lights or an uninterrupted beam, in which the movable cover arrangement allows in a road position to clear completely covers the light beam emitted, and in which the overall dimensions of the cover actuation system for its position change is optimized.
  • a projector for motor vehicle, comprising a light source, a reflector of the kind elliptical with a first focus located near the source, a lens convergent with a focal plane passing in the vicinity of a second focus of the reflector, a first cover provided between the reflector and the lens, which has an edge defining a first particular cutoff profile for the light beam emitted, and a second cover disposed in front of the first cover and selectively movable between two positions, a first position in which an edge of the second cover is positioned on the path of the light rays to form with the first cover a light beam with a second particular cut-off profile, and a second position in which said edge of the second cover is substantially positioned outside of the path of the light rays to form a second light beam with the first cut profile.
  • the first cover is selectively movable between two positions, a first position in which said edge of the first cover is positioned on the path of the light rays to form a beam with said first cut profile, and a second position in which said edge of the cover is substantially positioned outside the path of the light rays to form a second light beam without interruption, and in that the second cover is positioned at a distance from the first cover, and allows in its second position to forming said second light beam without interruption.
  • the figures show a headlamp for a motor vehicle which comprises a lamp 10 mounted in the bottom of a reflector 20 of the elliptical type of so that the filament 11 of the lamp is located in the vicinity of a first focus of the reflector 20.
  • the projector also includes a converging lens 75 mounted on a frame portion 40 of the projector secured to the reflector.
  • the focal plane of the lens 75 passes in the vicinity of the second focus of the reflector 20.
  • the projector has a movable cover 50 which in the embodiment in FIG. 1 is a first cover, provided between the reflector 20 and the lens 75.
  • the assembly constituting the optical unit is mounted in a manner not shown. in a case closed by a mirror.
  • the cover 50 positioned near the focal plane of the lens 75 has an edge 51 capable of defining in the focal plane of said lens, a first profile of particular cut-off for the light beam emitted.
  • the edge 51 defines a profile of cut off for traffic on the right.
  • the cover 50 is pivotally mounted around a pivot axis X generally horizontal and transverse to the top optical axis of the projector.
  • the pivoting mounting of the cover 50 on the part frame 30 of the projector is produced by means of a shaft 54 introduced into the through said cover in holes 53 and mounted in two bearings 31,32 of the frame part 30 of the headlamp so that it is free to rotate in these bearings.
  • the projector comprises means for tilting the cover 50 to selectively bring it into two positions, a first vertical position in which the edge 51 of the cover 50 is positioned in the focal plane of the lens on the path of light rays to forming a light beam with said first cut profile, and a second horizontal position in which the edge 51 of the cover is positioned out of the way light rays to form here an unbroken light beam.
  • the first position is a position code for traffic on the right and the second position is a road position.
  • the second horizontal position of the cover 50 is a third position of the cover 50 in the embodiments shown in the Figures 5 to 8.
  • the first position corresponds to the formation of a cut-off beam different from the code beam.
  • the cover 50 is in the form of a blade which has a thickness such that when positioned horizontally in the position road, it practically does not obscure the light beam emitted by the source bright and reflected by the reflector.
  • the means for tilting the cover 50 around the axis X comprises here an operating means comprising an actuating rod 61 including one end is linked to the cover by being inserted into a housing 55 provided on a lateral side of the cover 50.
  • the other end of the rod is connected to a electromagnet 60 capable of actuating the rod 61 by pushing or pulling it in such a way so that it causes the pivoting of the cover 50 between the first code position and the road position.
  • the electromagnet 60 comprises a housing in which are positioned a coil (in the bottom of the case), and a core so classic.
  • the core is movable in translation inside the case and is connected to the end of the actuating rod 61.
  • the core could be a part of the rod 61.
  • the core is stressed by a return spring.
  • This return spring has tendency to recall the nucleus in a remote rest position.
  • the coil of the electromagnet When the coil of the electromagnet is supplied with current, it moves the core so that it drives the actuating rod 61 forward, while compressing the spring reminder against the inner wall of the housing.
  • the solenoid coil When the solenoid coil is not no longer supplied with current, the core is no longer stressed by the coil and the spring recall brings the core and the rod 61 to the aforementioned rest position.
  • the tilting movement of the cover 50 from the vertical position code towards the horizontal road position is achieved by means of an actuating lever manual linked to cover 50.
  • the blade constituting the cover 50 extends below of the axis of rotation X of the cover and is integral with a counterweight 52.
  • this counterweight is mounted on the blade or is formed in one piece with said blade.
  • Counterweight 52 means that in the first position of the cover 50, the center of gravity of the blade is moved below its axis of rotation and thus naturally the cover 50 tends to be placed in the first vertical code position with its counterweight 52 positioned downwards.
  • the framework piece 30 includes a stop 33 mounted on each of said bearings 31,32, having an L-shape with a horizontal part 33a extending towards the front of the projector in a plane containing the axis X of tilting of the cover 50 and a vertical part 33b extending above the axis X of tilting of the cover 50, said part horizontal 33a defining the horizontal road position of the cover 50 and said part vertical 33b defining the vertical positions code of the cover 50.
  • the size of the blade 50 below the axis of rotation is minimal and the space-saving counterweight requires no additional space compared to the space initially provided in the conventional projector housing.
  • the behavior of the device is as follows:
  • the return spring does not need to exert a very large return force on the rod to cause the cover 50 to return from the road position to the first position code with the desired speed since it is assisted by the force of gravity exerted by the counterweight 52.
  • the counterweight and return spring both help keep the cover in a stable position when the electromagnet is not supplied with current to avoid in particular that the cover vibrates when the motor vehicle is moving.
  • cover 50 there are also provided on the cover 50 two lateral tabs 56 which come bear against the edges of a central opening 35 of the frame part 30. These side tabs are offset from the plane precisely in the plane of the frame piece 30 which is the focal plane the blade 50 from a distance equal to the thickness of the frame piece so that in the first position vertical code of the cover 50, it is placed from the projector lens.
  • a second cover 70 disposed in front of the first cover 50, at a distance from the latter.
  • This second cover is selectively movable between two positions. In a first position the edge 70a of the second cover 70 is positioned on the path of the spokes light to form with the first cover 50 a light beam with a second particular cutoff profile.
  • the second cover 70 has a rectangular shape with straight edges of length substantially equal to half that of the first cover 50.
  • the second cover 70 extends on the left side of cover 50 looking at it from the front, so that it allows in its first vertical position to raise the cut initially formed by the first cover to cut off traffic on the left in the light beam emitted by the projector.
  • the edge 70a of the second cover 70 is substantially positioned outside the path of the light rays to either form a light beam with the first cut profile (the first cover 50 then being raised), i.e. a light beam without interruption (the first cover 50 being lowered).
  • This second cover 70 is pivotally mounted on a lateral part of the projector by means of a lever 71 bent with a part capable of projecting outside the housing to be operated manually.
  • the lever is mounted in rotation on the axis 72 extending horizontally and substantially parallel to the optical axis O of the projector.
  • the second cover 70 then pivots in a vertical plane transverse to the optical axis.
  • the second cover 70 is positioned at a distance d from the first cover as small as possible.
  • the two covers 50 and 70 are raised (that is to say in their first position) so that they overlap and the light beam emitted by the spotlight has a cutout for left-hand traffic.
  • the second cover 70 is not located, in the raised position, in the focal plane of the lens. We here then accepts a slightly degraded cut, but in a variant not shown, it is arranged that the second cover is located substantially in the focal plane of the lens.
  • the two covers 50.70 are lowered to form a light beam without interruption, here a road beam.
  • a second embodiment of the projector according to the invention.
  • it is provided in addition to the tilting means, means for translating the cover 50 in the direction transverse to the optical axis O of the projector, to bring said cover 50 selectively from the first position of the cover 50 with its edge 51 in the path light rays to form a cut-off beam for right-hand traffic, and at a second position in which said edge of the cover 50 is offset transversely with respect to the optical axis O in the path of the light rays, so that form a light beam with a second cut profile, here a cut for left-hand traffic.
  • the means of translation of the cover 50 comprise according to the mode of illustrated embodiment, a manual actuating rod 80.83 linked to the cover and provided with a return spring 82 from the second to the first position of the cover 50.
  • the means for translating the cover comprise an actuating rod of which one end is linked to the cover and another end is connected to a electromagnet provided with a return spring, said electromagnet being intended to be supplied with current to actuate said rod so that it drives the translation of the cover from its first position to its second position.
  • the displacement at translation of the cover 50 is produced over a distance d1 of the order of 10 millimeters so as to move the cut laterally to the left while looking at the cover 50 from the front and make a cut in the light beam for traffic on the left.
  • the return spring 82 In the second position of the cover (shown in dotted lines on the FIG. 6), the return spring 82 is compressed against a stop surface 82a, and when the return spring is released, it automatically returns the cover 50 in its first initial position (shown in solid lines in FIG. 6).
  • FIGS. 7 and 8 another embodiment of the projector according to the invention is shown, according to which means are provided for pivoting the optical unit around the optical axis O of the projector to selectively bring the cover 50 into said first position and in a second position in which the edge 51 of the cover 50 is positioned in the path of the light rays angularly offset in the vertical plane of the cover, to form a light beam with a second cutting profile.
  • the cut-off is noted so as to form a light beam with cut-off for traffic on the left, while when the cover is in its first initial position, it forms a light beam with cut-off for traffic on the right, as shown from the front on the Figure 7.
  • the cover 50 can be tilted from its first vertical position to its horizontal position (see Figure 8) to form a cut-off beam and an unbroken beam, as already described above.
  • the pivoting means of the optical unit can be means of tilting at an angle of about 15 degrees in the vertical plane of the cover. This can be achieved via a static or dynamic corrector of the orientation of the reflector.
  • the means of pivoting of the optical unit can also include an electric motor (not shown) able to rotate a cage 100 in which is mounted the optical unit.
  • the rotation means allow to angularly offset in the vertical plane the optical unit of a determined angle ⁇ in order to raise the cut in the emitted light beam and form a cut-off light beam for traffic left with a shaped cover to make a beam in the first position luminous cut-off for right-hand traffic.
  • This angle ⁇ is for example equal to 15 ° when it comes to switching from a European code position for traffic on the left to a European code position for traffic on the right and vice versa.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP00401849A 1999-07-13 2000-06-29 Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende Expired - Lifetime EP1069373B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9909081 1999-07-13
FR9909081A FR2796447B1 (fr) 1999-07-13 1999-07-13 Projecteur pour vehicule automobile avec un double cache mobile

Publications (2)

Publication Number Publication Date
EP1069373A1 true EP1069373A1 (de) 2001-01-17
EP1069373B1 EP1069373B1 (de) 2007-03-21

Family

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EP00401849A Expired - Lifetime EP1069373B1 (de) 1999-07-13 2000-06-29 Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende

Country Status (4)

Country Link
EP (1) EP1069373B1 (de)
DE (1) DE60033993T2 (de)
ES (1) ES2283281T3 (de)
FR (1) FR2796447B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1764551A1 (de) * 2005-09-20 2007-03-21 Valeo Vision Elliptischer Scheinwerfer mit einem Satz schwenkbarer Blenden
EP1826476A1 (de) * 2006-02-22 2007-08-29 Audi Ag Beleuchtungsvorrichtung für ein Fahrzeug
EP2060848A1 (de) 2007-11-16 2009-05-20 Valeo Vision Elliptischer Scheinwerfer für Kraftfahrzeug der mit einer Lichtblende für Reisen in Länder mit Verkehr auf der anderen Fahrbahnseite ausgestattet ist
EP2090821A1 (de) 2008-02-14 2009-08-19 Valeo Vision Elliptisches Modul für Kraftfahrzeug
DE102007050207A9 (de) * 2007-10-20 2009-09-03 Hella Kgaa Hueck & Co. Projektionsscheinwerfer für Fahrzeuge
CZ302002B6 (cs) * 2005-08-10 2010-09-01 Visteon Global Technologies, Inc. Svetlometový systém pro motorová vozidla
EP2189714A3 (de) * 2008-11-19 2011-11-02 Koito Manufacturing Co., Ltd. Fahrzeugscheinwerfer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008011180A1 (de) 2008-02-26 2009-08-27 GM Global Technology Operations, Inc., Detroit Scheinwerfer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381851A1 (de) 1989-02-08 1990-08-16 Hella KG Hueck & Co. Abgeblendeter Kraftfahrzeugscheinwerfer nach dem Projektionsprinzip
DE19501173A1 (de) * 1995-01-17 1996-07-18 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
DE19843287A1 (de) * 1997-09-26 1999-04-01 Valeo Vision Scheinwerfer in elliptischer Ausführung mit veränderlichem Lichtbündel, insbesondere für Kraftfahrzeuge

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968977A (en) 1989-02-03 1990-11-06 Digital Equipment Corporation Modular crossbar interconnection metwork for data transactions between system units in a multi-processor system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381851A1 (de) 1989-02-08 1990-08-16 Hella KG Hueck & Co. Abgeblendeter Kraftfahrzeugscheinwerfer nach dem Projektionsprinzip
DE19501173A1 (de) * 1995-01-17 1996-07-18 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
DE19843287A1 (de) * 1997-09-26 1999-04-01 Valeo Vision Scheinwerfer in elliptischer Ausführung mit veränderlichem Lichtbündel, insbesondere für Kraftfahrzeuge

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302002B6 (cs) * 2005-08-10 2010-09-01 Visteon Global Technologies, Inc. Svetlometový systém pro motorová vozidla
EP1764551A1 (de) * 2005-09-20 2007-03-21 Valeo Vision Elliptischer Scheinwerfer mit einem Satz schwenkbarer Blenden
EP1826476A1 (de) * 2006-02-22 2007-08-29 Audi Ag Beleuchtungsvorrichtung für ein Fahrzeug
DE102007050207A9 (de) * 2007-10-20 2009-09-03 Hella Kgaa Hueck & Co. Projektionsscheinwerfer für Fahrzeuge
EP2060848A1 (de) 2007-11-16 2009-05-20 Valeo Vision Elliptischer Scheinwerfer für Kraftfahrzeug der mit einer Lichtblende für Reisen in Länder mit Verkehr auf der anderen Fahrbahnseite ausgestattet ist
FR2923775A1 (fr) * 2007-11-16 2009-05-22 Valeo Vision Sa Projecteur elliptique pour vehicule automobile equipe d'un cache vacancier
EP2090821A1 (de) 2008-02-14 2009-08-19 Valeo Vision Elliptisches Modul für Kraftfahrzeug
EP2189714A3 (de) * 2008-11-19 2011-11-02 Koito Manufacturing Co., Ltd. Fahrzeugscheinwerfer

Also Published As

Publication number Publication date
ES2283281T3 (es) 2007-11-01
EP1069373B1 (de) 2007-03-21
FR2796447A1 (fr) 2001-01-19
DE60033993T2 (de) 2007-12-06
DE60033993D1 (de) 2007-05-03
FR2796447B1 (fr) 2001-08-17

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