EP1106911A1 - Headlamp comprising an ellipsoidal light reflector, capable of generating two specific dipped beams - Google Patents

Headlamp comprising an ellipsoidal light reflector, capable of generating two specific dipped beams Download PDF

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Publication number
EP1106911A1
EP1106911A1 EP00403289A EP00403289A EP1106911A1 EP 1106911 A1 EP1106911 A1 EP 1106911A1 EP 00403289 A EP00403289 A EP 00403289A EP 00403289 A EP00403289 A EP 00403289A EP 1106911 A1 EP1106911 A1 EP 1106911A1
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EP
European Patent Office
Prior art keywords
cover
lens
mirror
projector according
axis
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.)
Withdrawn
Application number
EP00403289A
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German (de)
French (fr)
Inventor
Pierre c/o Valeo Vision Albou
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Valeo Vision SAS
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Valeo Vision SAS
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Publication date
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Publication of EP1106911A1 publication Critical patent/EP1106911A1/en
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    • 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
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • F21S41/295—Attachment thereof specially adapted to projection lenses
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof

Definitions

  • the present invention relates generally to elliptical headlamps for vehicles automobiles.
  • elliptical projector is meant here a projector which has a small light source size, a recuperator and concentrator mirror suitable for create a spot of concentration in front of the source bright, and a lens able to project onto the road all or part of this light spot.
  • the cover is designed so that the beam has a horizontal cut at left, and raised to the right, and the mirror is designed to that the main beam concentration zone does not not centered on the axis of the road, but slightly shifted to the right to extend completely or partial under the raised cutoff.
  • the main objective of the present invention is to overcome these drawbacks of the state of the art and propose a projector which, with a design mirror single, can be used as projector for two types different beams, and in particular as a spotlight for left-hand traffic or as a searchlight crossing for traffic on the right, this in no way complicate the mutual assembly of the different components (mainly mirror, cover and lens) of the projector.
  • Another object of the present invention is to achieve this goal with a cache of unique, reversible design.
  • the invention proposes a elliptical crossover for a motor vehicle, comprising a light source, a recovery mirror and concentrator able to create in front of the source a spot of light concentration, and a lens capable of project this light spot on the road to form a lighting beam, as well as a cover chosen from at least two possible caches and interposed between the mirror and lens to obscure part of the bright spot and give the beam a break, characterized in that it includes mounting means of a lens holder on the mirror in one among at least two possible positions, said position being determined by the cache.
  • this mirror 10 having a reflecting surface 12 capable of forming a spot of light concentration in front of a source (not shown), such as the filament of a lamp incandescent or arc of a discharge lamp, placed in this mirror.
  • a source such as the filament of a lamp incandescent or arc of a discharge lamp
  • the mirror has an optical axis AO1 on which is positioned the source and which is centered the spot of light concentration.
  • the mirror Around the reflecting surface 12, the mirror has a generally flat rim against which intended to be fixed a cover 20 for forming a cut, as well as the base region 30 of a lens-carrying element, partially shown.
  • the lens itself is not shown.
  • the cover 20 has a window 22, one edge of which lower defines the profile of a cut sought for the beam. More precisely, this edge obscures part of the light spot formed by the mirror in the plane of the cover, so that the light spot as well obscured, projected onto the road by the lens (with 180 ° reversal according to the classical laws of optics) forms a passing beam delimited by an upper cut of corresponding profile.
  • the profile of the edge of the cover is defined by two horizontal line segments 22a, 22c, offset in height, separated by an oblique line segment 22b inclined about 15 ° from the horizontal, so to obtain a cut-off for type passing beam European for traffic on the right.
  • the base 30 of the lens holder has meanwhile four pins or pins 32 intended to carry out indexing the position of the lens, and particular of its optical axis, with respect to the mirror and to the cache.
  • the lens is indexed on the cover in a fixed manner (with the inversion of the cover close, such as will describe it later), using four holes circulars 24 formed in the region of the four corners of the plate forming the cover 20 and whose diameter is substantially equal to that of pawns 32.
  • Figure 1 the optical axis A02 of the lens, which passes through the intersection of the axes of horizontal and vertical reference, respectively h2 and v2, from the cache, this intersection being located at the transition between edges 22a, 22b of window 22 of hidden.
  • Indexing of the lens in relation to the mirror is done in a way that depends on the position of the hidden. More precisely, the cover 20 is designed so to be reversible and able, when assembling the projector, either occupy the position illustrated on the Figure 1, to make a low beam projector for traffic on the right, either be turned on itself and occupy the position illustrated in FIG. 2, to make a passing beam projector for traffic left.
  • this is achieved by providing, here in the upper region of the cover 20, two keying tabs 26, 28 extending horizontally and substantially parallel to the optical axis AO2, one on one side of the cover plane (rear side in FIG. 1) and the other on the other side of this same plane.
  • the lateral edge of the tongue 26 located on the side of the axis v2 is at a horizontal distance a from the latter, while the lateral edge of the tongue 28 also on the side of the axis v2 is at a horizontal distance b , greater than a , of this same axis.
  • the rim 13 of the mirror also has in its upper region, a keying notch 16 intended to cooperate with, depending on the position of the cover 20, either the tongue 26 or the tongue 28.
  • the edge of this notch on the side of the vertical axis vl is at a distance c from this same axis, the distance c being in this case between a and b .
  • the cover 20 can be pressed against the rim 13 of the mirror only in a position in which the tongue 26 enters the notch 16.
  • the optical axis A02 of the lens and of the cover is offset laterally by a distance equal to ca horizontally to the left (in front view) relative to the axis AO1.
  • the zone of maximum concentration of the light spot which is located at the intersection of the axes h1 and v1, is offset laterally by the same distance c - a with respect to the reference center of the mask, which is on the optical axis A02 and which will therefore be projected by the lens in the axis of the road.
  • the maximum concentration of the beam formed will be shifted to the right relative to the axis of the road, or in other words relative to the point of contact between the left half-cut (defined by the edge 22a) and the cutting part inclined at 15 ° (defined by the edge 22b).
  • This produces a passing beam for traffic on the right in which, desirably, the maximum concentration of light is shifted to the right.
  • the angular value of this offset is equal to arctg [(ca) / F] F being the focal length of the lens.
  • the cover 20 When the cover 20 is placed in the position of FIG. 2 to make a dipped headlamp for left-hand traffic, it can only be pressed against the edge 13 of the mirror by engaging the tongue 28 in the notch 16, and in in this case the optical axis AO2 of the lens and the cover is offset laterally by a distance equal to b - c horizontally to the right (in front view) relative to the axis AO1.
  • a beam is therefore produced, the cutoff of which is suitably reversed with respect to the case of traffic on the right, but also of which, for reasons symmetrical to those above, the zone of maximum concentration is shifted to the left with respect to the road axis. It can be shown that the angular value of this offset is equal to arctg [(bc) / F] F being here again the focal length of the lens.
  • the pins 32 of the base of the lens holder will, in the reversible cover system described above, occupy two different positions relative to the mirror according to the position given to the cover.
  • the mounting of the base 30 and the cover 20 on the mirror there is provided in the rim 13 of the latter oblong holes 14, elongated horizontally, making it possible to accept the respective pins 32 in one either of their positions. It is easy to demonstrate that to do this, the overall width of these holes 14 must be equal to or slightly greater than b - a + d , d being the diameter of the pins 32.
  • the assembly is carried out at the level of the pins, by example by crimping.
  • the optical system described above also makes it possible to shift the zone of maximum concentration of the beam downward, in addition to the lateral shift. To do this, it suffices to position the holes 24 of the cover 20 at a distance h from the axis h2, and to position the oblong holes 14 less than a distance f from the axis h1 and the oblong holes greater than a distance equal to 2 h - f on this same axis, and choose f and h so that arctg [(fh) / F] has the desired down shift value.
  • mirror 10 and base 30 assembly as described above can also be used with a cover different, such as a cover designed for a passing beam meeting the standards of the United States of America.
  • a cover typically includes a edge with two horizontal segments offset in height and separated by a segment inclined at about 45 °.

Abstract

The elliptical vehicle headlamp has a light source, a recovering and concentrating mirror (10,12) for creating a light concentration spot, and a lens adapted to project this concentrated light on the road for forming a light beam. There is a mask (20) interposed between the mirror and the lens for occulting a part of the light concentration spot. There are mounting supports (30) for the lens on the mirror (10) in two possible positions, these positions determined by the mask.

Description

La présente invention concerne d'une façon générale les projecteurs du genre elliptique pour véhicules automobiles.The present invention relates generally to elliptical headlamps for vehicles automobiles.

On entend ici par projecteur elliptique un projecteur qui comporte une source lumineuse de petite taille, un miroir récupérateur et concentrateur apte à créer en avant de la source une tache de concentration lumineuse, et une lentille apte à projeter sur la route tout ou partie de cette tache lumineuse.By elliptical projector is meant here a projector which has a small light source size, a recuperator and concentrator mirror suitable for create a spot of concentration in front of the source bright, and a lens able to project onto the road all or part of this light spot.

Pour obtenir un faisceau de croisement délimité par une coupure supérieure de profil approprié, il suffit de placer dans la région de la tache de concentration de lumière un cache ou écran qui occulte, au niveau d'un bord qui définira ladite coupure, une partie de cette tache.To obtain a passing beam delimited by a top cut of suitable profile, just place in the area of the concentration spot of light a mask or screen that obscures, at a level edge which will define said cutoff, part of this task.

Avec cette technologie, lorsque l'on souhaite réaliser un projecteur de croisement adapté à un sens de trafic donné, il est nécessaire de concevoir un cache spécifique, et également de recourir à un miroir qui modèle la tache lumineuse de façon adaptée à la réglementation.With this technology, when you want realize a dipped headlight adapted to a sense of given traffic, it is necessary to design a cache specific, and also to use a mirror that shapes the light spot to suit the regulations.

Ainsi, lorsque l'on souhaite réaliser un projecteur de croisement pour trafic à droite, le cache est conçu pour que le faisceau présente une coupure horizontale à gauche, et relevée à droite, et le miroir est conçu pour que la zone de concentration principale du faisceau ne soit pas centrée sur l'axe de la route, mais légèrement décalée vers la droite pour s'étendre de façon totale ou partielle sous la coupure relevée. So when you want to make a projector crossing for traffic on the right, the cover is designed so that the beam has a horizontal cut at left, and raised to the right, and the mirror is designed to that the main beam concentration zone does not not centered on the axis of the road, but slightly shifted to the right to extend completely or partial under the raised cutoff.

La réalisation d'un projecteur pour trafic à gauche impose donc, symétriquement, de recourir à un autre cache spécifique, et à un autre miroir spécifique, de manière à ce que la coupure soit relevée à gauche et que la zone de concentration soit décalée vers la gauche.The realization of a traffic light on the left symmetrically therefore requires the use of another cache specific, and to another specific mirror, so that that the cut is raised to the left and that the area of concentration is shifted to the left.

Il est ainsi nécessaire de recourir à deux outillages différents pour réaliser les caches, et à deux outillages différents pour réaliser les miroirs.It is thus necessary to resort to two different tools to make the covers, and two different tools for making mirrors.

Ceci contribue à un coût élevé des investissements de fabrication, et multiplie le nombre de pièces à référencer et à stocker dans le processus de fabrication.This contributes to a high cost of investments manufacturing, and multiplies the number of parts to reference and store in the manufacturing process.

La présente invention a pour objectif principal de pallier ces inconvénients de l'état de la technique et de proposer un projecteur qui, avec un miroir de conception unique, puisse convenir comme projecteur pour deux types de faisceaux différents, et notamment comme projecteur de croisement pour trafic à gauche ou comme projecteur de croisement pour trafic à droite, ceci sans nullement compliquer l'assemblage mutuel des différents composants (principalement miroir, cache et lentille) du projecteur.The main objective of the present invention is to overcome these drawbacks of the state of the art and propose a projector which, with a design mirror single, can be used as projector for two types different beams, and in particular as a spotlight for left-hand traffic or as a searchlight crossing for traffic on the right, this in no way complicate the mutual assembly of the different components (mainly mirror, cover and lens) of the projector.

Un autre objet de la présente invention est de permettre d'atteindre cet objectif avec un cache de conception unique, réversible.Another object of the present invention is to achieve this goal with a cache of unique, reversible design.

L'invention propose à cet effet un projecteur de croisement du genre elliptique pour véhicule automobile, comprenant une source lumineuse, un miroir récupérateur et concentrateur apte à créer en avant de la source une tache de concentration lumineuse, et une lentille apte à projeter cette tache lumineuse sur la route pour former un faisceau d'éclairage, ainsi qu'un cache choisi parmi au moins deux caches possibles et interposé entre le miroir et la lentille pour occulter une partie de la tache lumineuse et conférer au faisceau une coupure, caractérisé en ce qu'il comprend des moyens de montage d'un support de la lentille sur le miroir dans l'une parmi au moins deux positions possibles, ladite position étant déterminée par le cache.To this end, the invention proposes a elliptical crossover for a motor vehicle, comprising a light source, a recovery mirror and concentrator able to create in front of the source a spot of light concentration, and a lens capable of project this light spot on the road to form a lighting beam, as well as a cover chosen from at least two possible caches and interposed between the mirror and lens to obscure part of the bright spot and give the beam a break, characterized in that it includes mounting means of a lens holder on the mirror in one among at least two possible positions, said position being determined by the cache.

Des aspects préférés, mais non limitatifs de ce projecteur sont les suivants :

  • les positions différentes de montage du support de la lentille définissent différents décalages horizontaux entre un axe de la lentille et un axe du miroir.
  • les positions différentes de montage du support de la lentille définissent une position mutuelle unique entre un axe de la lentille et un axe du cache.
  • les positions différentes de montage du support de la lentille définissent au moins une valeur de décalage vertical entre un axe de la lentille et un axe du miroir.
  • le cache est choisi parmi deux caches possibles constitués par une même pièce réversible, selon le sens du trafic auquel est destiné le projecteur, tandis que la position de la lentille par rapport au miroir est déterminée par le sens de montage du cache.
  • il est prévu des moyens d'indexation invariable entre le support de la lentille et le cache.
  • il est prévu entre le cache et le miroir des moyens d'indexation mutuelle, la partie des moyens d'indexation appartenant au cache étant constituée par deux aménagements coopérant l'un ou l'autre, selon le sens de montage du cache, avec un aménagement complémentaire d'indexation solidaire du miroir.
  • les deux aménagements d'indexation du cache comprennent deux parties saillantes s'étendant de part et d'autre d'un plan du cache, tandis que l'aménagement complémentaire d'indexation solidaire du miroir comprend une encoche apte à recevoir l'une ou l'autre des languettes.
  • lesdites parties saillantes sont situées à distances latérales inégales d'un axe de référence vertical du cache.
  • le cache réversible est apte à former, selon son positionnement, l'une parmi deux coupures asymétriques pour deux sens de circulation du véhicule.
  • le projecteur est apte à recevoir alternativement un second cache destiné à former un profil de coupure différent de ceux formés par le cache réversible.
  • les coupures asymétriques formées par le cache réversible sont des coupures de faisceaux de croisement conformes aux règlements européens, tandis que la coupure formée par le second cache est une coupure de faisceau de croisement conforme aux règlements des Etats-Unis d'Amérique.
Preferred, but not limiting, aspects of this projector are:
  • the different mounting positions of the lens support define different horizontal offsets between an axis of the lens and an axis of the mirror.
  • the different mounting positions of the lens support define a unique mutual position between an axis of the lens and an axis of the cover.
  • the different mounting positions of the lens support define at least one vertical offset value between an axis of the lens and an axis of the mirror.
  • the cover is chosen from two possible covers formed by the same reversible part, depending on the direction of traffic for which the projector is intended, while the position of the lens relative to the mirror is determined by the direction of mounting of the cover.
  • invariable indexing means are provided between the support of the lens and the cover.
  • mutual indexing means are provided between the cover and the mirror, the part of the indexing means belonging to the cover being constituted by two arrangements cooperating one or the other, depending on the direction of mounting of the cover, with a additional indexing arrangement integral with the mirror.
  • the two indexing arrangements of the cover comprise two protruding parts extending on either side of a plane of the cover, while the complementary indexing arrangement secured to the mirror comprises a notch capable of receiving one or the other of the tabs.
  • said projecting parts are located at unequal lateral distances from a vertical reference axis of the cover.
  • the reversible cover is capable of forming, depending on its positioning, one of two asymmetrical cuts for two directions of movement of the vehicle.
  • the projector is capable of alternately receiving a second cover intended to form a cut-off profile different from those formed by the reversible cover.
  • the asymmetrical breaks formed by the reversible cover are cuts in passing beams in accordance with European regulations, while the break formed by the second cover is a passing beam cuts in accordance with regulations in the United States of America.

D'autres aspects, buts et avantages de la présente invention apparaítront mieux à la lecture de la description détaillée suivante d'une forme de réalisation préférée de celle-ci, donnée à titre d'exemple non limitatif et faire en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue en perspective de la région d'assemblage du miroir, du cache et du porte-lentille d'un projecteur du genre elliptique selon l'invention, dans une première situation, et
  • la figure 2 est une vue en perspective analogue à la figure 1, et partielle, de la même région dans une seconde situation.
    • Other aspects, aims and advantages of the present invention will appear better on reading the following detailed description of a preferred embodiment of the latter, given by way of non-limiting example and with reference to the accompanying drawings, on which ones :
  • FIG. 1 is a perspective view of the region of assembly of the mirror, the cover and the lens holder of a projector of the elliptical type according to the invention, in a first situation, and
  • Figure 2 is a perspective view similar to Figure 1, and partial, of the same region in a second situation.

    • En référence tout d'abord à la figure 1, on a représenté la région antérieure d'un miroir de projecteur du genre elliptique selon l'invention, ce miroir 10 possédant une surface réfléchissante 12 apte à former une tache de concentration lumineuse en avant d'une source (non représentée), telle que le filament d'une lampe à incandescence ou l'arc d'une lampe à décharge, placée dans ce miroir. Le miroir possède un axe optique AO1 sur lequel est positionnée la source et sur lequel est centrée la tache de concentration lumineuse.Referring first to Figure 1, we have depicted the anterior region of a spotlight mirror of the elliptical type according to the invention, this mirror 10 having a reflecting surface 12 capable of forming a spot of light concentration in front of a source (not shown), such as the filament of a lamp incandescent or arc of a discharge lamp, placed in this mirror. The mirror has an optical axis AO1 on which is positioned the source and which is centered the spot of light concentration.

    Autour de la surface réfléchissante 12, le miroir possède un rebord généralement plan contre lequel est destiné à être fixé un cache 20 de formation de coupure, ainsi que la région d'embase 30 d'un élément porte-lentille, représenté partiellement. La lentille elle-même n'est pas représentée.Around the reflecting surface 12, the mirror has a generally flat rim against which intended to be fixed a cover 20 for forming a cut, as well as the base region 30 of a lens-carrying element, partially shown. The lens itself is not shown.

    Le cache 20 possède une fenêtre 22 dont un bord inférieur définit le profil d'une coupure recherchée pour le faisceau. Plus précisément, ce bord occulte une partie de la tache lumineuse formée par le miroir dans le plan du cache, de telle sorte que la tache lumineuse ainsi occultée, projetée sur la route par la lentille (avec retournement à 180° suivant les lois classiques de l'optique) forme un faisceau de croisement délimité par une coupure supérieure de profil correspondant. Dans le présent exemple, le profil du bord du cache est défini par deux segments de droite horizontaux 22a, 22c, décalés en hauteur, séparés par un segment de droite oblique 22b incliné d'environ 15° par rapport à l'horizontale, afin d'obtenir une coupure pour faisceau de croisement de type européen pour trafic à droite.The cover 20 has a window 22, one edge of which lower defines the profile of a cut sought for the beam. More precisely, this edge obscures part of the light spot formed by the mirror in the plane of the cover, so that the light spot as well obscured, projected onto the road by the lens (with 180 ° reversal according to the classical laws of optics) forms a passing beam delimited by an upper cut of corresponding profile. In the this example, the profile of the edge of the cover is defined by two horizontal line segments 22a, 22c, offset in height, separated by an oblique line segment 22b inclined about 15 ° from the horizontal, so to obtain a cut-off for type passing beam European for traffic on the right.

    L'embase 30 du porte-lentille possède quant à lui quatre picots ou pions 32 destinés à réaliser l'indexation de la position de la lentille, et en particulier de son axe optique, par rapport au miroir et au cache.The base 30 of the lens holder has meanwhile four pins or pins 32 intended to carry out indexing the position of the lens, and particular of its optical axis, with respect to the mirror and to the cache.

    L'indexation de la lentille sur le cache s'effectue de façon fixe (au retournement du cache près, tel qu'on le décrira plus loin), à l'aide de quatre orifices circulaires 24 formés dans la région des quatre coins de la plaque formant le cache 20 et dont le diamètre est sensiblement égal à celui des pions 32. On a ainsi représenté sur la figure 1 l'axe optique A02 de la lentille, qui passe par l'intersection des axes de référence horizontal et vertical, respectivement h2 et v2, du cache, cette intersection étant située à la transition entre les bords 22a, 22b de la fenêtre 22 du cache.The lens is indexed on the cover in a fixed manner (with the inversion of the cover close, such as will describe it later), using four holes circulars 24 formed in the region of the four corners of the plate forming the cover 20 and whose diameter is substantially equal to that of pawns 32. We thus have shown in Figure 1 the optical axis A02 of the lens, which passes through the intersection of the axes of horizontal and vertical reference, respectively h2 and v2, from the cache, this intersection being located at the transition between edges 22a, 22b of window 22 of hidden.

    L'indexation de la lentille par rapport au miroir s'effectue d'une façon qui dépend de la position du cache. Plus précisément le cache 20 est conçu de manière à être réversible et pouvoir, lors de l'assemblage du projecteur, soit occuper la position illustrée sur la figure 1, pour réaliser un projecteur de croisement pour trafic à droite, soit être retourné sur lui-même et occuper la position illustrée sur la figure 2, pour réaliser un projecteur de croisement pour trafic à gauche.Indexing of the lens in relation to the mirror is done in a way that depends on the position of the hidden. More precisely, the cover 20 is designed so to be reversible and able, when assembling the projector, either occupy the position illustrated on the Figure 1, to make a low beam projector for traffic on the right, either be turned on itself and occupy the position illustrated in FIG. 2, to make a passing beam projector for traffic left.

    Selon la position du cache, son axe optique A02, qui reste dans tous les cas celui de la lentille, est positionné différemment par rapport à l'axe optique AO1 du miroir.Depending on the position of the cover, its optical axis A02, which remains in all cases that of the lens, is positioned differently from the optical axis AO1 from the mirror.

    Dans la forme de réalisation illustrée, ceci est réalisé en prévoyant, ici dans la région supérieure du cache 20, deux languettes de détrompage 26, 28 s'étendant horizontalement et sensiblement parallèlement à l'axe optique AO2, l'une d'un côté du plan du cache (côté arrière sur la figure 1) et l'autre de l'autre côté de ce même plan. Le bord latéral de la languette 26 situé du côté de l'axe v2 se trouve à une distance horizontale a de ce dernier, tandis que le bord latéral de la languette 28 également côté axe v2 se trouve à une distance horizontale b, supérieure à a, de ce même axe.In the illustrated embodiment, this is achieved by providing, here in the upper region of the cover 20, two keying tabs 26, 28 extending horizontally and substantially parallel to the optical axis AO2, one on one side of the cover plane (rear side in FIG. 1) and the other on the other side of this same plane. The lateral edge of the tongue 26 located on the side of the axis v2 is at a horizontal distance a from the latter, while the lateral edge of the tongue 28 also on the side of the axis v2 is at a horizontal distance b , greater than a , of this same axis.

    Le rebord 13 du miroir possède par ailleurs dans sa région supérieure, une encoche de détrompage 16 destinée à coopérer avec, selon la position du cache 20, soit la languette 26, soit la languette 28. Le bord de cette encoche du côté de l'axe vertical vl se trouve à une distance c de ce même axe, la distance c étant en l'espèce comprise entre a et b.The rim 13 of the mirror also has in its upper region, a keying notch 16 intended to cooperate with, depending on the position of the cover 20, either the tongue 26 or the tongue 28. The edge of this notch on the side of the vertical axis vl is at a distance c from this same axis, the distance c being in this case between a and b .

    Dans l'orientation de la figure 1, le cache 20 ne peut être plaqué contre le rebord 13 du miroir que dans une position dans laquelle la languette 26 pénètre dans l'encoche 16. Il en résulte que l'axe optique A02 de la lentille et du cache est décalé latéralement d'une distance égale à c-a horizontalement vers la gauche (en vue de face) par rapport à l'axe AO1. Ceci a pour conséquence principale le fait que la zone de concentration maximale de la tache lumineuse, qui se trouve à l'intersection des axes h1 et v1, est décalée latéralement de la même distance c-a par rapport au centre de référence du cache, qui se trouve sur l'axe optique A02 et qui sera donc projeté par la lentille dans l'axe de la route. Il en résulte donc que la concentration maximale du faisceau formé va se trouver décalée vers la droite par rapport l'axe de la route, ou en d'autres termes par rapport au point de contact entre la demi-coupure gauche (définie par le bord 22a) et la partie de coupure inclinée à 15° (définie par le bord 22b). On réalise ainsi un faisceau de croisement pour trafic à droite dans lequel, de façon désirable, la concentration maximale de la lumière est décalée vers la droite. Il est aisé de démontrer que, dans l'hypothèse où le plan du cache 20 passe par le foyer de la lentille, la valeur angulaire de ce décalage est égale à arctg[(c-a)/F] F étant la longueur focale de la lentille.In the orientation of FIG. 1, the cover 20 can be pressed against the rim 13 of the mirror only in a position in which the tongue 26 enters the notch 16. As a result, the optical axis A02 of the lens and of the cover is offset laterally by a distance equal to ca horizontally to the left (in front view) relative to the axis AO1. The main consequence of this is that the zone of maximum concentration of the light spot, which is located at the intersection of the axes h1 and v1, is offset laterally by the same distance c - a with respect to the reference center of the mask, which is on the optical axis A02 and which will therefore be projected by the lens in the axis of the road. It therefore follows that the maximum concentration of the beam formed will be shifted to the right relative to the axis of the road, or in other words relative to the point of contact between the left half-cut (defined by the edge 22a) and the cutting part inclined at 15 ° (defined by the edge 22b). This produces a passing beam for traffic on the right in which, desirably, the maximum concentration of light is shifted to the right. It is easy to demonstrate that, in the event that the plane of the cover 20 passes through the focal point of the lens, the angular value of this offset is equal to arctg [(ca) / F] F being the focal length of the lens.

    Lorsque le cache 20 est placé dans la position de la figure 2 pour réaliser une projecteur de croisement pour trafic à gauche, il ne peut être plaqué contre le rebord 13 du miroir qu'en engageant la languette 28 dans l'encoche 16, et dans ce cas l'axe optique AO2 de la lentille et du cache est décalé latéralement d'une distance égale à b-c horizontalement vers la droite (en vue de face) par rapport à l'axe AO1.When the cover 20 is placed in the position of FIG. 2 to make a dipped headlamp for left-hand traffic, it can only be pressed against the edge 13 of the mirror by engaging the tongue 28 in the notch 16, and in in this case the optical axis AO2 of the lens and the cover is offset laterally by a distance equal to b - c horizontally to the right (in front view) relative to the axis AO1.

    On réalise donc un faisceau dont la coupure est convenablement inversée par rapport au cas d'un trafic à droite, mais dont également, pour des raisons symétriques de celles qui précèdent, la zone de concentration maximale est décalée vers la gauche par rapport à l'axe de la route. L'on peut démontrer que la valeur angulaire de ce décalage est égale à arctg[(b-c)/F] F étant ici encore la longueur focale de la lentille. A beam is therefore produced, the cutoff of which is suitably reversed with respect to the case of traffic on the right, but also of which, for reasons symmetrical to those above, the zone of maximum concentration is shifted to the left with respect to the road axis. It can be shown that the angular value of this offset is equal to arctg [(bc) / F] F being here again the focal length of the lens.

    On comprend également que, si l'on choisit c = (a+b)/2 alors les valeurs des décalages vers la droite et vers la gauche sont identiques.We also understand that, if we choose c = (a + b) / 2 then the values of the shifts to the right and to the left are identical.

    Comme on l'observe, les pions 32 de l'embase du porte-lentille vont, dans le système à cache réversible décrit ci-dessus, occuper deux positions différentes par rapport au miroir selon la position donnée au cache. Pour permettre dans les deux cas le montage de l'embase 30 et du cache 20 sur le miroir, on prévoit dans le rebord 13 de ce dernier des trous oblongs 14, allongés horizontalement, permettant d'accepter les pions respectifs 32 dans l'une ou l'autre de leurs positions. Il est aisé de démontrer que pour ce faire, la largeur hors-tout de ces trous 14 doit être égale ou légèrement supérieure à b-a+d, d étant le diamètre des pions 32.As can be seen, the pins 32 of the base of the lens holder will, in the reversible cover system described above, occupy two different positions relative to the mirror according to the position given to the cover. To allow in both cases the mounting of the base 30 and the cover 20 on the mirror, there is provided in the rim 13 of the latter oblong holes 14, elongated horizontally, making it possible to accept the respective pins 32 in one either of their positions. It is easy to demonstrate that to do this, the overall width of these holes 14 must be equal to or slightly greater than b - a + d , d being the diameter of the pins 32.

    L'assemblage est réalisé au niveau des pions, par exemple par sertissage.The assembly is carried out at the level of the pins, by example by crimping.

    Par ailleurs, le système optique décrit ci-dessus permet également de décaler la zone de concentration maximale du faisceau vers le bas, en plus du décalage latéral. Il suffit pour ce faire de positionner les trous 24 du cache 20 à une distance h de l'axe h2, et de positionner les trous oblongs 14 inférieurs à une distance f de l'axe h1 et les trous oblongs supérieurs à une distance égale à 2h-f de ce même axe, et de choisir f et h de telle sorte que arctg[(f-h)/F] ait la valeur du décalage vers le bas souhaité.Furthermore, the optical system described above also makes it possible to shift the zone of maximum concentration of the beam downward, in addition to the lateral shift. To do this, it suffices to position the holes 24 of the cover 20 at a distance h from the axis h2, and to position the oblong holes 14 less than a distance f from the axis h1 and the oblong holes greater than a distance equal to 2 h - f on this same axis, and choose f and h so that arctg [(fh) / F] has the desired down shift value.

    Ce décalage n'est pas illustré sur les figures par souci de clarté. This offset is not illustrated in the figures by for the sake of clarity.

    On observera également, de façon non illustrée, que l'ensemble miroir 10 et embase 30 tel que décrit ci-dessus peut également être utilisé avec un cache différent, tel que par exemple un cache conçu pour un faisceau de croisement répondant aux normes des Etats-Unis d'Amérique. Un tel cache comporte typiquement un bord possédant deux segments horizontaux décalés en hauteur et séparés par un segment incliné à environ 45°.It will also be observed, not illustrated, that the mirror 10 and base 30 assembly as described above can also be used with a cover different, such as a cover designed for a passing beam meeting the standards of the United States of America. Such a cache typically includes a edge with two horizontal segments offset in height and separated by a segment inclined at about 45 °.

    Ce cache étant de conception propre, on peut choisir librement la position de la languette de détrompage (qui pourra être unique dans le cas où le cache n'est pas destiné à être réversible) et la position des trous destinés à laisser passer les pions 32 de manière à obtenir la position relative souhaitée entre le miroir et l'ensemble cache/lentille, c'est-à-dire la position relative souhaitée entre la tache de concentration formant le faisceau et le profil de coupure (étant observé qu'en règle générale, une position relative identique à celle décrite ci-dessus en référence à la figure 1, c'est-à-dire pour un faisceau de croisement européen pour trafic à droite, conviendra).This cache being of clean design, we can freely choose the position of the tongue coding (which may be unique in the case where the cover is not intended to be reversible) and the position holes intended to allow the pawns 32 of so as to obtain the desired relative position between the mirror and the lens / cover assembly, i.e. the desired relative position between the spot of beam forming concentration and cutoff profile (being observed that as a general rule, a position relative identical to that described above with reference in Figure 1, i.e. for a beam of European crossing for traffic on the right, will suit)

    Bien entendu, la présente invention n'est nullement limitée aux formes de réalisation décrites et représentées, mais l'homme du métier saura y apporter de nombreuses variantes ou modifications.Of course, the present invention is by no means limited to the embodiments described and represented, but the skilled person will be able to bring many variations or modifications.

    Claims (12)

    Projecteur de croisement du genre elliptique pour véhicule automobile, comprenant une source lumineuse, un miroir récupérateur et concentrateur (10, 12) apte à créer en avant de la source une tache de concentration lumineuse, et une lentille apte à projeter cette tache lumineuse sur la route pour former un faisceau d'éclairage, ainsi qu'un cache (20) choisi parmi au moins deux caches possibles et interposé entre le miroir et la lentille pour occulter une partie de la tache lumineuse et conférer au faisceau une coupure, caractérisé en ce qu'il comprend des moyens de montage d'un support (30) de la lentille sur le miroir (10) dans l'une parmi au moins deux positions possibles, ladite position étant déterminée par le cache.Elliptical type low beam for a motor vehicle, comprising a source light, a recuperator and concentrator mirror (10, 12) able to create in front of the source a spot of light concentration, and a lens capable of projecting this bright spot on the road to form a lighting beam, as well as a cover (20) chosen from at least two possible caches and interposed between the mirror and lens to obscure part of the bright spot and give the beam a break, characterized in that it includes mounting means of a support (30) of the lens on the mirror (10) in one of at least two possible positions, said position being determined by the cover. Projecteur selon la revendication 1, caractérisé en ce que les positions différentes de montage du support (30) de la lentille définissent différents décalages horizontaux entre un axe (A02) de la lentille et un axe (A01) du miroir.Projector according to claim 1, characterized in that the different positions of mounting the lens holder (30) define different horizontal offsets between an axis (A02) of the lens and an axis (A01) of the mirror. Projecteur selon la revendication 2, caractérisé en ce que les positions différentes de montage du support de la lentille définissent une position mutuelle unique entre un axe A02) de la lentille et un axe (A01) du cache.Projector according to claim 2, characterized in that the different positions of lens holder mounting define a unique mutual position between an axis A02) of the lens and an axis (A01) of the cover. Projecteur selon l'une des revendications 1 à 3, caractérisé en ce que les positions différentes de montage du support de la lentille définissent au moins une valeur de décalage vertical entre un axe (A02) de la lentille et un axe du miroir (AO1).Projector according to one of claims 1 to 3, characterized in that the different positions of lens holder mounting define at least a vertical offset value between an axis (A02) of the lens and a mirror axis (AO1). Projecteur selon l'une des revendications 1 à 4, caractérisé en ce que le cache est choisi parmi deux caches possibles constitués par une même pièce réversible (20), selon le sens du trafic auquel est destiné le projecteur, et en ce que la position de la lentille par rapport au miroir est déterminée par le sens de montage du cache.Projector according to one of claims 1 to 4, characterized in that the cover is chosen from two possible covers made up of the same reversible part (20), depending on the direction of traffic for which the projector, and in that the position of the lens by relationship to the mirror is determined by the mounting direction of the cache. Projecteur selon la revendication 5, caractérisé en ce qu'il est prévu des moyens d'indexation invariable (32, 24) entre le support de la lentille et le cache.Projector according to claim 5, characterized in that indexing means are provided invariable (32, 24) between the lens support and the hidden. Projecteur selon l'une des revendications 5 et 6, caractérisé en ce qu'il est prévu entre le cache (20) et le miroir (10) des aménagements d'indexation mutuelle, les aménagements d'indexation appartenant au cache étant constitués par deux aménagements (26, 28) coopérant l'un ou l'autre, selon le sens de montage du cache, avec un aménagement complémentaire d'indexation (16) solidaire du miroir.Projector according to one of claims 5 and 6, characterized in that it is provided between the cover (20) and the mirror (10) of the indexing arrangements mutual insurance, the indexing facilities belonging to the cover being constituted by two arrangements (26, 28) cooperating one or the other, depending on the mounting direction of the cache, with additional indexing arrangement (16) integral with the mirror. Projecteur selon la revendication 7, caractérisé en ce que les deux aménagements d'indexation (26, 28) du cache comprennent deux parties saillantes s'étendant de part et d'autre d'un plan du cache, et en ce que l'aménagement complémentaire d'indexation solidaire du miroir comprend une encoche (16) apte à recevoir l'une ou l'autre des languettes. Projector according to claim 7, characterized in that the two indexing arrangements (26, 28) of the cover include two protruding parts extending on either side of a plane of the cache, and in what the additional indexing arrangement integral with the mirror comprises a notch (16) suitable for receive one or other of the tabs. Projecteur selon la revendication 8, caractérisé en ce que lesdites parties saillantes sont situées à distances latérales inégales (a, b) d'un axe de référence vertical (v2) du cache.Projector according to claim 8, characterized in that said projections are located at unequal lateral distances (a, b) from an axis of vertical reference (v2) of the cover. Projecteur selon l'une des revendications 5 à 9, caractérisé en ce que le cache réversible (20) est apte à former, selon son positionnement, l'une parmi deux coupures asymétriques pour deux sens de circulation du véhicule.Projector according to one of claims 5 to 9, characterized in that the reversible cover (20) is able to form, according to its positioning, one of two asymmetrical cuts for two directions of circulation of the vehicle. Projecteur selon l'une des revendications 5 à 10, caractérisé en ce qu'il est apte à recevoir alternativement un second cache destiné à former un profil de coupure différent de ceux formés par le cache réversible.Projector according to one of claims 5 to 10, characterized in that it is suitable for receiving alternatively a second cover intended to form a cut profile different from those formed by the cover reversible. Projecteur selon les revendications 10 et 11 prises en combinaison, caractérisé en ce que les coupures asymétriques formées par le cache réversible (20) sont des coupures de faisceaux de croisement conformes aux règlements européens, et en ce que la coupure formée par le second cache est une coupure de faisceau de croisement conforme aux règlements des Etats-Unis d'Amérique.Projector according to claims 10 and 11 taken in combination, characterized in that the cuts asymmetrical formed by the reversible cover (20) are dipped beam cuts in accordance with European regulations, and in that the cut formed by the second cover is a dipped beam cutout complies with United States of America regulations.
    EP00403289A 1999-12-09 2000-11-24 Headlamp comprising an ellipsoidal light reflector, capable of generating two specific dipped beams Withdrawn EP1106911A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9915540A FR2802283B1 (en) 1999-12-09 1999-12-09 ELLIPTICAL PROJECTOR WITH NON-SPECIFIC MIRROR CAPABLE OF FORMING TWO SPECIFIC CROSSING BEAMS
    FR9915540 1999-12-09

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    EP1106911A1 true EP1106911A1 (en) 2001-06-13

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    EP00403289A Withdrawn EP1106911A1 (en) 1999-12-09 2000-11-24 Headlamp comprising an ellipsoidal light reflector, capable of generating two specific dipped beams

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    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2762772A1 (en) 2005-07-26 2014-08-06 Valeo Vision Lighting assembly for automotive vehicles

    Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR710340A (en) * 1931-01-31 1931-08-21 New headlight for automobiles, projecting no upward beam that could dazzle
    EP0293959A2 (en) * 1987-06-04 1988-12-07 FRIEMANN & WOLF GmbH Non-glaring headlight, particularly for mining vehicles
    FR2778452A1 (en) * 1998-05-06 1999-11-12 Valeo Vision ELLIPTICAL PROJECTOR WITH VARIABLE BEAM FOR MOTOR VEHICLE

    Patent Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR710340A (en) * 1931-01-31 1931-08-21 New headlight for automobiles, projecting no upward beam that could dazzle
    EP0293959A2 (en) * 1987-06-04 1988-12-07 FRIEMANN & WOLF GmbH Non-glaring headlight, particularly for mining vehicles
    FR2778452A1 (en) * 1998-05-06 1999-11-12 Valeo Vision ELLIPTICAL PROJECTOR WITH VARIABLE BEAM FOR MOTOR VEHICLE

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2762772A1 (en) 2005-07-26 2014-08-06 Valeo Vision Lighting assembly for automotive vehicles

    Also Published As

    Publication number Publication date
    FR2802283A1 (en) 2001-06-15
    FR2802283B1 (en) 2002-01-25

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