EP0715120B1 - Projecteur de type elliptique pour véhicule automobile, comportant un cache basculant - Google Patents

Projecteur de type elliptique pour véhicule automobile, comportant un cache basculant Download PDF

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Publication number
EP0715120B1
EP0715120B1 EP95402693A EP95402693A EP0715120B1 EP 0715120 B1 EP0715120 B1 EP 0715120B1 EP 95402693 A EP95402693 A EP 95402693A EP 95402693 A EP95402693 A EP 95402693A EP 0715120 B1 EP0715120 B1 EP 0715120B1
Authority
EP
European Patent Office
Prior art keywords
screen
headlamp
axis
flanges
headlamp according
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
EP95402693A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0715120A1 (fr
Inventor
Jacques Berton
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
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP0715120A1 publication Critical patent/EP0715120A1/fr
Application granted granted Critical
Publication of EP0715120B1 publication Critical patent/EP0715120B1/fr
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 headlamps of the elliptical type for motor vehicles.
  • a projector of this kind conventionally comprises an elliptical type mirror at the first focus of which is placed the filament of a lamp.
  • a converging lens is focused on the second focus of the mirror, and a lens closes the projector.
  • the lens may be formed by the lens itself.
  • a mask is placed in the vicinity of the second focal point of the mirror, one edge of which defines the profile of the cut-off and which obscures the part of the radiation that would otherwise propagate above this cutoff.
  • a difficulty of this type of projector compared to the parabolic type projectors lies in the difficulty that there is in modifying the profile of the cut. Such a modification may be desirable, in particular when a headlamp, designed for example for a right-hand traffic direction, must form a beam suitable for left-hand traffic. It may also be desirable to produce a universal headlamp capable of selectively generating a passing beam or an anti-fog beam.
  • this adaptation is carried out by affixing on the glass of the projector an adhesive mask masking part of the radiation of the side of the raised part of the cut so as to obtain a generally straight cut.
  • the present invention proposes to improve this type of known headlamp, and aims in particular at means making it possible to give the tilting cover a particularly well-defined position in one or the other of its two positions, as well as means for preventing there is no risk of the cover occupying an intermediate position between the two positions, making it possible respectively to obtain the two cut beams.
  • the present invention relates to a motor vehicle headlamp, comprising a light source, a mirror of the ellipsoidal type of which a first focal point is located in the vicinity of the source, a converging lens whose focal plane passes in the vicinity of a second focal point of the mirror , and a movable cover device provided between the mirror and the lens, the movable cover device comprising a screen capable of pivoting about an axis generally horizontal and transverse to an optical axis of the projector, which has two edges, each defining respectively a particular cut-off profile for the generated beam, and a means for operating said screen to selectively bring one or the other of said edges onto the radiation path and selectively form two beams with different cut-off, characterized in that the screen has the shape of an "L" angle and in that it includes stop means defining two stable positions of the angle in which one or the other of its wings is generally vertical.
  • FIG. 1 there is shown an elliptical type projector which includes a lamp 1, a mirror 2 of the ellipsoidal type and a lens 4, as well as a closing glass not shown.
  • the filament of the lamp 1 is placed in the vicinity of the first focus F1 of the mirror 2.
  • the focal plane PF of the lens 4, coaxial with the mirror 2, passes through the second focus F2 of the mirror.
  • a movable cover device is located between the mirror 2 and the lens 4, so as to selectively define, in the focal plane PF or in its vicinity, a first cover with a first cutting profile and a second cover with a second cutting profile.
  • This device consists of a mobile screen 30 in the form of an "L" angle, the two wings of which are listed 31 and 32.
  • This screen is able to pivot around an axis XX 'passing through the junction zone of the two wings.
  • pins 36 forming lateral projections, engaged in bearings or hinges 33 formed in a part attached to the mirror 2.
  • the screen 30, in the position illustrated in FIG. 3, has a profile defined by three straight lines 31a, 31b and 31c of the wing 31, arranged as illustrated, so as to generate a crossing light beam for right-hand traffic, that is to say with an increase in the cutoff, defined by the segments 31a and 31b, in the right half of the beam.
  • the second profile of the screen is defined by the free edge of the wing 32 and also includes three straight segments 32a, 32b, 32c, defining, when the screen has tilted 90 ° around the axis XX ', a cut-off profile of a passing beam for left-hand traffic.
  • the screen is able to cooperate with stops to define two stable positions, in which one or the other of the wings 31 and 32 extends in a vertical position, which corresponds to the cuts to be generated.
  • one or more plates forming a stop could be used, each extending horizontally on either side of the axis XX '.
  • the screen wing 31 is provided, on one of its short sides generally perpendicular to the cutting profile, with a plate 34. This plate extends in a vertical plane and is directed towards the side of the second wing . It affects, seen from the front (FIGS. 6 and 7), the shape of a rectangle whose two long sides are parallel to the wing 32. It is pierced with a circular opening 340, arranged halfway between the two large above-mentioned sides and near its free edge.
  • the screen is equipped with an operating means capable of selectively bringing one or the other of its edges onto the path of the beam of the projector.
  • This operating means consists of a pull tab 5 formed from a bent metal wire and able to be moved along an axis Y, Y ′ generally horizontal and parallel to an optical axis of the projector. To do this, the pull tab is engaged in guide means 7 formed in the wall of the projector.
  • This pull tab is mechanically connected to the screen 30.
  • the projector according to the invention is provided with elastic means capable of urging the screen towards a position in which one or the other of its wings is in abutment against one or the other of the stops 41 and 41 '.
  • these means consist of a coil spring 6 whose opposite ends 60 and 60 'have the shape of a hook.
  • the zipper is moved in the direction of the arrow h. If necessary, the direction of movement will be indicated by a mark immediately visible to the operator.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP95402693A 1994-11-30 1995-11-29 Projecteur de type elliptique pour véhicule automobile, comportant un cache basculant Expired - Lifetime EP0715120B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414370 1994-11-30
FR9414370A FR2727495A1 (fr) 1994-11-30 1994-11-30 Projecteur de type elliptique pour vehicule automobile, comportant un cache basculant

Publications (2)

Publication Number Publication Date
EP0715120A1 EP0715120A1 (fr) 1996-06-05
EP0715120B1 true EP0715120B1 (fr) 2000-04-05

Family

ID=9469319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402693A Expired - Lifetime EP0715120B1 (fr) 1994-11-30 1995-11-29 Projecteur de type elliptique pour véhicule automobile, comportant un cache basculant

Country Status (4)

Country Link
EP (1) EP0715120B1 (enrdf_load_stackoverflow)
DE (1) DE69516093T2 (enrdf_load_stackoverflow)
ES (1) ES2146725T3 (enrdf_load_stackoverflow)
FR (1) FR2727495A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2769071B1 (fr) * 1997-09-26 1999-12-03 Valeo Vision Projecteur de type elliptique a faisceau variable, notamment pour vehicule automobile
FR2781870B1 (fr) * 1998-08-03 2000-10-13 Valeo Vision Projecteur du type elliptique, comportant un cache basculant

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1389291A (en) * 1920-01-08 1921-08-30 Evan P Bone Headlamp
DE3415867A1 (de) 1984-04-28 1985-10-31 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Abgeblendeter fahrzeugscheinwerfer mit einem schalenfoermigen reflektor
IT1247780B (it) * 1990-11-16 1994-12-30 Carello Spa Proiettore ellittico a due luci per veicoli

Also Published As

Publication number Publication date
ES2146725T3 (es) 2000-08-16
EP0715120A1 (fr) 1996-06-05
FR2727495B1 (enrdf_load_stackoverflow) 1997-02-14
FR2727495A1 (fr) 1996-05-31
DE69516093T2 (de) 2000-09-14
DE69516093D1 (de) 2000-05-11

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