EP0688999A1 - Kraftfahrzeugscheinwerfer insbesondere mit elliptischem Reflektor zum Emittieren eines welches zwei selektiv umschaltbare Lichtbegrenzungen aufweist Lichtbündels - Google Patents

Kraftfahrzeugscheinwerfer insbesondere mit elliptischem Reflektor zum Emittieren eines welches zwei selektiv umschaltbare Lichtbegrenzungen aufweist Lichtbündels Download PDF

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Publication number
EP0688999A1
EP0688999A1 EP95401495A EP95401495A EP0688999A1 EP 0688999 A1 EP0688999 A1 EP 0688999A1 EP 95401495 A EP95401495 A EP 95401495A EP 95401495 A EP95401495 A EP 95401495A EP 0688999 A1 EP0688999 A1 EP 0688999A1
Authority
EP
European Patent Office
Prior art keywords
shutter
flap
cut
projector
support rod
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
EP95401495A
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English (en)
French (fr)
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EP0688999B1 (de
Inventor
Bernard Bigot
Didier Vraux
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
Original Assignee
Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP0688999A1 publication Critical patent/EP0688999A1/de
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Publication of EP0688999B1 publication Critical patent/EP0688999B1/de
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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

Definitions

  • the invention relates to a beam projector, in particular for a motor vehicle.
  • Such a projector essentially comprises a light source and a reflector together defining a light beam, as well as a means for defining the cut-off, that is to say for defining the delimitation between the illuminated area and the dark area, of the diagram of 'headlamp illumination, as required in particular for dipped headlights and fog lamps.
  • the means for defining the cut-off may consist of a screening screen. interposed in the beam, the edge of this screen defining the desired cutoff profile.
  • the main object of the invention is to propose a headlamp of this type making it possible to selectively modify the cut-off profile, that is to say, in other words, making it possible to choose two single cut-outs on one and the same headlamp. different as needed.
  • EP-A-0 294 589 projects a projector according to the preamble of claim 1.
  • These means include, here again, a fixed element and a mobile element defining in combination the cutoff, but proposition of this anticipation these two elements are distant from each other in the direction of the axis of the beam.
  • the disadvantage is that it is necessary to give one of the two elements (the fixed element, in the example illustrated by this document) a curved shape in order to compensate for the axial offset relative to the focus and act in a substantially uniform manner across the entire beam width.
  • the cut defined by this device has a poor definition, therefore provides a beam quality lower than that which would be with a specialized projector with single cut.
  • a headlight as defined in claim 1.
  • Figure 1 is a front view, along I-I of Figure 2, of the screen of the projector of the invention, equipped with a rotary control system.
  • FIG. 2 is a side view, along II-II of FIG. 1, of this same screening screen, it being observed that, in this figure, another embodiment of the control system has been illustrated, this time using a translation system in place of the rotary system of Figure 1 (the rest of the device being otherwise identical).
  • Figures 1 and 2 show the screen for masking the projector of the invention.
  • This screen is located inside the projector and interposed in the beam, in the vicinity of the second focal point of an ellipsoidal mirror, in order to define a cut, the edge of the blackout screen having the shape of the profile. cutoff selected.
  • the other elements of the projector such as the light source, the mirror, the closing glass, etc. are in themselves well known and will not be described in detail.
  • the projector is in particular a projector of the "elliptical" type, because in such a type of projector the only possible solution for defining a cut-off consists in interposing a screening screen in the beam, in close proximity to the light source.
  • the reference 1 designates a fixed element of the blackout screen, which will be called hereinafter "blade” and which, taken in isolation, is of the same type as the blackout screens of specialized projectors with single cut-off.
  • blade a fixed element of the blackout screen
  • FIG. 1 it is a screen defining a cutout for an American type passing beam, that is to say with two horizontal parts offset on either side of the axis. central and an inclined transition part between these horizontal parts.
  • a movable element 2 is provided, which will be called hereinafter “shutter”, intended to partially obscure the blade and thus modify the profile of the cut.
  • the blade 1 and the flap 2 are two essentially vertical elements, flat and arranged one against the other, therefore substantially in the same plane, which makes it possible to define a cut with excellent sharpness.
  • the blade 1 is integral with a fixed part 3 such as a support piece placed inside the projector, while the shutter 2, which is extended by a horizontal tab 4, on a vertical movable rod 5.
  • the shutter 2 is fixed by the tab 4 on the rod 5 for example by means of a nut 6 tightened on a threaded end 7 of the rod 5.
  • the lower end of the rod carries the actuator means making it possible to move the flap in vertical translation.
  • FIG. 1 it is a rotary deflection system in which the lower end 8 of the rod 5 cooperates with a ring 9 which can rotate in axial rotation around the axis ⁇ and provided , on its face turned towards the end 8, of an inner peripheral ramp 10 coming in contact with the region 11 of the end 8 forming a cam.
  • This ring and cam deflection system makes it possible to transform the axial rotational movement of the ring 9 into a vertical translational movement of the rod 5.
  • a helical spring 12 placed in compression between the tab 4 and the fixed support 3 ensures permanent contact between the ramp 10 and the cam 11.
  • the flap 2 When one operates a rotation of the ring 9, the flap 2 is biased by the spring 12 to move in vertical translation (arrow 13) to a raised position, and gradually obscure the right part (with the conventions of the figure) blade 1.
  • stops 14, 15 allowing precise definition of an end of travel for this translational movement, so that the final position of the flap 2 (illustrated in dashed lines in 16) is precisely in alignment with the horizontal part. 17 of the edge of the blade 1. It is thus possible to define, in the upper position of the flap 2, a horizontal cut of excellent quality, entirely comparable to that which would have been obtained with a specialized cut-off projector. invariable.
  • the ramp and cam device must at the end of travel completely release the shutter, that is to say that the stroke x1 of this ramp device and cam must be slightly greater than the total travel x2 of shutter 2 between its two extreme positions.
  • actuator means comprise a translation control, for example a pull tab disposed on the side of the projector instead of a rotating ring.
  • the lower end 8 ′ of the rod 5 is configured so as to cooperate with a part such as a fork 9 ′ comprising a ramp 10 ′, for example by means of a homologous surface 11 ′ forming a cam, so as to selectively release the shutter 2 so that it adopts its raised position, against the stops 14, 15, under the action of the spring 12, and bring the shutter into its retracted position against the force of the spring.
  • the presence of the spring 12 and the stops 14 and 15 ensures, on the one hand, a very good resistance to vibrations and, on the other hand, a very good cut quality, since this is defined by the position - invariable - of these stops and not by an end of stroke of the free end of a moving part, necessarily subject to mechanical play and changes over time.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP95401495A 1994-06-23 1995-06-23 Kraftfahrzeugscheinwerfer insbesondere mit elliptischem Reflektor zum Emittieren eines Lichtbündels mit zwei selektiv umschaltbaren Lichtbegrenzungen Expired - Lifetime EP0688999B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407709 1994-06-23
FR9407709A FR2721685B1 (fr) 1994-06-23 1994-06-23 Projecteur automobile, en particulier à réflecteur elliptique, produisant un faisceau susceptible de deux coupures sélectivement commutables.

Publications (2)

Publication Number Publication Date
EP0688999A1 true EP0688999A1 (de) 1995-12-27
EP0688999B1 EP0688999B1 (de) 2000-05-24

Family

ID=9464557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401495A Expired - Lifetime EP0688999B1 (de) 1994-06-23 1995-06-23 Kraftfahrzeugscheinwerfer insbesondere mit elliptischem Reflektor zum Emittieren eines Lichtbündels mit zwei selektiv umschaltbaren Lichtbegrenzungen

Country Status (3)

Country Link
EP (1) EP0688999B1 (de)
DE (1) DE69517095T2 (de)
FR (1) FR2721685B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796448A1 (fr) * 1999-07-13 2001-01-19 Valeo Vision Projecteur pour vehicule automobile avec un cache a multipositions
EP1160507A1 (de) 2000-05-31 2001-12-05 Valeo Vision Scheinwerfer für Kraftfahrzeug mit einer durch eine Rückstellfeder angetriebenen Lichtblende
FR2809803A1 (fr) 2000-05-31 2001-12-07 Valeo Vision Projecteur de vehicule automobile a ecran mobile
EP1201988A3 (de) * 2000-10-25 2004-06-23 Zizala Lichtsysteme GmbH Fahrzeugscheinwerfer
EP1283390A3 (de) * 2001-08-10 2006-05-10 Ichikoh Industries, Ltd. Scheinwerfer mit zwei Funktionen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3528820A1 (de) 1985-08-10 1987-02-12 Bosch Gmbh Robert Scheinwerfer, insbesondere scheinwerfer fuer abblendlicht oder nebellicht, von fahrzeugen
EP0294589A2 (de) 1987-06-12 1988-12-14 Robert Bosch Gmbh Abblendlichtscheinwerfer
DE3903631C1 (de) 1989-02-08 1990-07-05 Hella Kg Hueck & Co, 4780 Lippstadt, De
EP0429922A1 (de) * 1989-12-01 1991-06-05 Hella KG Hueck & Co. Scheinwerfer nach dem Projektionsprinzip
EP0573994A2 (de) * 1992-06-12 1993-12-15 Stanley Electric Co., Ltd. Scheinwerfer ähnliche Beleuchtungseinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3528820A1 (de) 1985-08-10 1987-02-12 Bosch Gmbh Robert Scheinwerfer, insbesondere scheinwerfer fuer abblendlicht oder nebellicht, von fahrzeugen
EP0294589A2 (de) 1987-06-12 1988-12-14 Robert Bosch Gmbh Abblendlichtscheinwerfer
DE3903631C1 (de) 1989-02-08 1990-07-05 Hella Kg Hueck & Co, 4780 Lippstadt, De
EP0429922A1 (de) * 1989-12-01 1991-06-05 Hella KG Hueck & Co. Scheinwerfer nach dem Projektionsprinzip
EP0573994A2 (de) * 1992-06-12 1993-12-15 Stanley Electric Co., Ltd. Scheinwerfer ähnliche Beleuchtungseinrichtung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796448A1 (fr) * 1999-07-13 2001-01-19 Valeo Vision Projecteur pour vehicule automobile avec un cache a multipositions
EP1160507A1 (de) 2000-05-31 2001-12-05 Valeo Vision Scheinwerfer für Kraftfahrzeug mit einer durch eine Rückstellfeder angetriebenen Lichtblende
FR2809803A1 (fr) 2000-05-31 2001-12-07 Valeo Vision Projecteur de vehicule automobile a ecran mobile
FR2809801A1 (fr) 2000-05-31 2001-12-07 Valeo Vision Projecteur pour vehicule automobile a ecran d'occultation associe a un ressort de rappel
EP1201988A3 (de) * 2000-10-25 2004-06-23 Zizala Lichtsysteme GmbH Fahrzeugscheinwerfer
EP1283390A3 (de) * 2001-08-10 2006-05-10 Ichikoh Industries, Ltd. Scheinwerfer mit zwei Funktionen

Also Published As

Publication number Publication date
FR2721685A1 (fr) 1995-12-29
DE69517095D1 (de) 2000-06-29
DE69517095T2 (de) 2000-11-02
FR2721685B1 (fr) 1996-09-13
EP0688999B1 (de) 2000-05-24

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