EP0750156B1 - Projection type motor vehicle headlamp comprising an improved mirror - Google Patents

Projection type motor vehicle headlamp comprising an improved mirror Download PDF

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Publication number
EP0750156B1
EP0750156B1 EP96401351A EP96401351A EP0750156B1 EP 0750156 B1 EP0750156 B1 EP 0750156B1 EP 96401351 A EP96401351 A EP 96401351A EP 96401351 A EP96401351 A EP 96401351A EP 0750156 B1 EP0750156 B1 EP 0750156B1
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EP
European Patent Office
Prior art keywords
mirror
occulter
lens
focus
headlight according
Prior art date
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Expired - Lifetime
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EP96401351A
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German (de)
French (fr)
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EP0750156A3 (en
EP0750156A2 (en
Inventor
Antonio Lopez Vasco
Fermin Gonzalez Gallegos
Vincente Vallejo Fernandez
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP0750156A3 publication Critical patent/EP0750156A3/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
    • F21S41/40—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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated

Definitions

  • the present invention relates to projectors of the elliptical type for motor vehicles.
  • a projector of this kind is conventionally composed a lamp mounted in the region of the first focus of a elliptical type mirror, and a converging lens whose focal plane passes in the vicinity of the second focus of the mirror to project the audit image onto the road second home.
  • This projector is supplemented if necessary by a concealer placed substantially in said focal plane, so as to form a cut beam whose limits are defined by an upper edge of the screen.
  • either the lens is directly integrated into the projector glass, i.e. the projector has a separate, generally smooth glass in front of the lens.
  • the lamp holder PL is assembled to the mirror M, at the back of it, around a lamp hole.
  • the projector additionally comprises an intermediate piece PI, which is mounted on the edge of the front opening of the mirror M by extending it forward.
  • this piece PI includes a screen or blackout E intended to give the bundle the desired cutoff profile, as well as a ring B intended to receive and maintain a lens Le par its edges.
  • the mirror of the projector made in one piece, is necessarily an open mirror, whether made by molding or by stamping. As a result, the recovery of the flow light emitted by the lamp is limited.
  • this known projector is not capable of generating a beam having a clear cut. Indeed, we use in this known spotlight, as a means of forming the cut, an extension of the mirror, occurring downstream of a first lens and upstream of a second lens. In addition, the remedy with two lenses significantly increases the cost and difficulty of projector manufacturing.
  • the present invention therefore aims to provide a projector of the elliptical type, in which the recovery of the luminous flux emitted by the source is significant, with in addition a simpler and economical structure, and which is at the same time capable of generating a beam at clean cut without complication of this structure and therefore with no additional cost.
  • the present invention provides a projector such as defined in claim 1.
  • an elliptical projector which comprises a lamp La, a lens Le, and two parts 100 and 200 suitable for being assembled one to the other perpendicular to the optical axis x-x of the projector, according to arrows F2, to form a lamp holder, a mirror, an intermediate concealer part and a lens ring.
  • these two parts end up in a horizontal plane passing through the x-x axis, this being in no way limiting.
  • the upper part 100 includes a zone PL 'forming upper half lamp holder, an area M 'forming a half mirror upper, a zone PI 'forming an intermediate half-part upper, and an area B 'forming upper half-ring.
  • the lower part has a PL area " forming a lower half lamp holder, an area M “forming lower half-mirror, a PI “area forming a half-part lower intermediate, and a zone B “forming a half-ring lower.
  • the PI part "carries, projecting towards the top and in one piece, a blackout or oblique screen E whose upper edge is placed substantially in the plane focal lens Le.
  • the projector according to Figure 2 also includes a spring R to hold the lamp La on the lamp holder.
  • the mirror M can close in the direction of the lens and extend to the vicinity of the focal plane of the Le lens, or even beyond it, for a significantly increased flow recovery compared to solutions known in the projector technique elliptical.
  • Parts 100 and 200 can be produced, each in one piece, preferably in any suitable material by molding. So we can make alloy parts aluminum, zinc alloy, resin thermosetting or high melt resin temperature, this enumeration being however in no way limiting. So we can make parts 100 and 200 by stamping sheet steel, brass, aluminum or any other material likely to be stamped.
  • the two parts 100, 200 are fixed by for example by gluing, by screwing or by clipping.
  • the lamp holder, the mirror, the intermediate piece and the lens holder ring consist of two parts 300, 400 which end up in a vertical plane passing through the optical axis x-x of the projector.
  • the left room 300 (looking at the projector from face) has a part PL 'forming a half-lamp holder left, a part M 'forming a half-mirror on the left, a intermediate half-part PI 'and a half-ring B'.
  • the part 300 comprises a lateral wing 301 extending in a vertical plane over the entire height of the room, substantially in the middle region of the mirror. She also includes a wing 302 extending in a plane vertical passing in the vicinity of the optical axis, on most of the depth of the projector, above and below the room. Wing 302 has a series of centering pins P.
  • the intermediate part PI ' consists of a zone enlarged 304, rectangular section with rounded corners, in which a side light 306 is formed ventilation.
  • This intermediate part PI ' is closed at the rear by a transverse wall in which is formed a half-opening 310, generally semi-elliptical, for the passage of light. It's closed at the front by a transverse wall in which is formed a circular half-opening to receive the Le lens, this opening being bordered by a bead 307 in which a groove 308 is formed for reception a peripheral retaining rib belonging to the Le lens.
  • wing 302 are formed from rear fittings 303 and earlier 305 intended to cooperate with staples assembly A.
  • the part 300 further comprises, extending to approximately 45 ° upwards and backwards from the base of the half-opening, the first part of the screen or screen oblique E 'which has in its upper part, projecting in direction of room 400 from the vertical plane of connection of the two parts 300 and 400, an extension 312.
  • Part 400 is essentially made symmetrically from part 300 and has a wing lateral 401 extending in the same vertical plane as wing 301, also over the entire height of the projector. It also includes a wing 402 intended to be attached to wing 302 over its entire extent. Wing 402 has a series of holes T intended to receive the centering pins P during assembly.
  • the intermediate half-part PI " is symmetrical with the intermediate half PI ", with a side light 406 ventilation. It is also closed at the back by a transverse wall in which a half-opening is formed 410 which, with the half-opening 310, defines a generally elliptical opening for the passage of the light from the second focal point of the mirror towards the lens Le.
  • the PI "intermediate half-part is closed at the front by a transverse wall in which a half-opening is formed circular bordered by a bead 407 in which is formed a groove 408 for receiving a peripheral retaining rib belonging to the lens The. This defines a half-ring B "for mounting the lens.
  • wing 402 are formed from rear fittings 403 and earlier 405 intended to cooperate with the arrangements counterparts 303, 305 of part 300 for the clipping of assembly clips A.
  • the part 300 further comprises, extending to approximately 45 ° upwards and backwards from the base of the half-opening 410, a second concealer part or oblique screen E "which has a recess intended for receive the extension 312 of the half screen E '.
  • the recovery of the luminous flux emitted by the lamp can be further increased.
  • Such a solution makes it possible to extend the mirror forward, especially in part low, well beyond the focal plane of the lens, at vicinity of which extends the upper edge of the screen occultation. More specifically, the light rays returned to the second focus of the mirror by the the most forward regions of it are going to be at again sent back to the first home, to increase the luminous flux actually emitted by the source in the region of said first focus.
  • Figures 6 and 7 illustrate a second mode of realization of the invention, which differs from that of Figures 2 to 5 essentially by an arrangement different from the La lamp.
  • the light output can be increased to the extent that the solid angle, seen from the source, from the mirror part occupied by the lamp holder can be reduced.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

La présente invention concerne les projecteurs du genre elliptique pour véhicules automobiles.The present invention relates to projectors of the elliptical type for motor vehicles.

Un projecteur de ce genre se compose classiquement d'une lampe montée dans la région du premier foyer d'un miroir de type elliptique, et d'une lentille convergente dont le plan focal passe au voisinage du second foyer du miroir pour projeter sur la route l'image présente audit second foyer.A projector of this kind is conventionally composed a lamp mounted in the region of the first focus of a elliptical type mirror, and a converging lens whose focal plane passes in the vicinity of the second focus of the mirror to project the audit image onto the road second home.

Ce projecteur est complété le cas échéant par un occulteur placé sensiblement dans ledit plan focal, de manière à former un faisceau coupé dont les limites sont définies par une arête supérieure de l'occulteur.This projector is supplemented if necessary by a concealer placed substantially in said focal plane, so as to form a cut beam whose limits are defined by an upper edge of the screen.

Par ailleurs, soit la lentille est directement intégrée à la glace du projecteur, soit le projecteur comporte une glace distincte, généralement lisse, en avant de la lentille.By the way, either the lens is directly integrated into the projector glass, i.e. the projector has a separate, generally smooth glass in front of the lens.

On a représenté sur la figure 1 ces divers éléments, dans leur construction classique.These various elements have been represented in FIG. 1, in their classic construction.

Ainsi l'on trouve une lampe La montée dans un porte-lampe PL et fixée à celui-ci par un crochet élastique ou ressort R. Le porte-lampe PL est assemblé au miroir M, à l'arrière de celui-ci, autour d'un trou de lampe. Le projecteur comprend en outre une pièce intermédiaire PI, qui est montée sur le bord de l'ouverture frontale du miroir M en prolongeant celui-ci vers l'avant. cette pièce PI comporte un écran ou occulteur E destiné à donner au faisceau le profil de coupure souhaité, ainsi qu'une bague B destinée à recevoir et à maintenir une lentille Le par ses bords.So we find a lamp mounted in a lamp holder PL and fixed to it by an elastic hook or spring R. The lamp holder PL is assembled to the mirror M, at the back of it, around a lamp hole. The projector additionally comprises an intermediate piece PI, which is mounted on the edge of the front opening of the mirror M by extending it forward. this piece PI includes a screen or blackout E intended to give the bundle the desired cutoff profile, as well as a ring B intended to receive and maintain a lens Le par its edges.

Du fait de ce type de structure connu, le miroir du projecteur, réalisé d'une seule pièce, est nécessairement un miroir ouvert, qu'il soit réalisé par moulage ou par emboutissage. Il en résulte que la récupération du flux lumineux émis par la lampe est limitée.Due to this known type of structure, the mirror of the projector, made in one piece, is necessarily an open mirror, whether made by molding or by stamping. As a result, the recovery of the flow light emitted by the lamp is limited.

On connaít également par le document JP-U-04 5007 publié le 17/01/94 un projecteur du genre elliptique dans lequel le miroir est réalisé en deux parties assemblées l'une à l'autre dans une direction transversale à l'axe optique.We also know from document JP-U-04 5007 published 01/17/94 an elliptical projector in which the mirror is made in two parts assembled to each other in a direction transverse to the optical axis.

Cette solution connue, dont l'objet est de simplifier la fabrication du projecteur, n'amène toutefois aucune amélioration en matière de récupération du flux lumineux dans la mesure où le miroir reste un miroir ouvert.This known solution, the object of which is to simplify the manufacture of the projector, however does not bring any improvement in terms of recovery of the luminous flux insofar as the mirror remains an open mirror.

On connaít enfin par DE-C-427143 un projecteur tel que défini dans le préambule de la revendication 1.We finally know from DE-C-427143 a projector such as defined in the preamble of claim 1.

Toutefois, ce projecteur connu n'est pas capable d'engendrer un faisceau présentant une coupure nette. En effet, on utilise dans ce projecteur connu, comme moyen de formation de la coupure, un prolongement du miroir, intervenant en aval d'une première lentille et en amont d'une seconde lentille. En outre, le recours à deux lentilles accroít sensiblement le coût et la difficulté de fabrication du projecteur.However, this known projector is not capable of generating a beam having a clear cut. Indeed, we use in this known spotlight, as a means of forming the cut, an extension of the mirror, occurring downstream of a first lens and upstream of a second lens. In addition, the remedy with two lenses significantly increases the cost and difficulty of projector manufacturing.

La présente invention vise donc à proposer un projecteur du genre elliptique, dans lequel la récupération du flux lumineux émis par la source soit importante, avec en outre une structure plus simple et économique, et qui soit en même temps capable d'engendrer un faisceau à coupure nette sans complication de cette structure et donc sans surcoût associé. The present invention therefore aims to provide a projector of the elliptical type, in which the recovery of the luminous flux emitted by the source is significant, with in addition a simpler and economical structure, and which is at the same time capable of generating a beam at clean cut without complication of this structure and therefore with no additional cost.

Ainsi la présente invention propose un projecteur tel que défini dans la revendication 1.Thus the present invention provides a projector such as defined in claim 1.

Des aspects préférés de ce projecteur sont définis dans les revendications dépendantes.Preferred aspects of this projector are defined in dependent claims.

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

  • la figure 1 est une vue schématique en coupe axiale d'un projecteur du genre elliptique de la technique antérieure,
  • la figure ibis est une vue schématique en coupe axiale d'un projecteur du genre elliptique selon l'invention, la figure 2 est une vue en perspective éclatée d'un projecteur selon une première forme de réalisation concrète de l'invention,
  • la figure 3 est une vue de dessus en plan du projecteur de la figure 2, assemblé,
  • la figure 4 est une vue en coupe horizontale axiale du projecteur des figures 2 et 3, assemblé,
  • la figure 5 est une vue de côté en élévation d'une partie du projecteur des figures 2 et 3,
  • la figure 6 est une vue de côté en élévation d'une partie d'un projecteur selon une deuxième forme de réalisation de l'invention, et
  • la figure 7 est une vue de face du projecteur de la figure 6.
    • Other aspects, aims and advantages of the present invention will appear better on reading the following detailed description of preferred embodiments thereof, given by way of nonlimiting example and made with reference to the accompanying drawings, in which :
  • FIG. 1 is a schematic view in axial section of a projector of the elliptical type of the prior art,
  • FIG. ibis is a schematic view in axial section of a projector of the elliptical type according to the invention, FIG. 2 is an exploded perspective view of a projector according to a first concrete embodiment of the invention,
  • FIG. 3 is a top plan view of the projector of FIG. 2, assembled,
  • FIG. 4 is a view in axial horizontal section of the headlight of FIGS. 2 and 3, assembled,
  • FIG. 5 is a side elevation view of part of the headlight of FIGS. 2 and 3,
  • FIG. 6 is a side elevation view of part of a headlight according to a second embodiment of the invention, and
  • FIG. 7 is a front view of the projector of FIG. 6.

    • En référence tout d'abord à la figure ibis, on a représenté schématiquement un projecteur elliptique selon l'invention, qui comprend une lampe La, une lentille Le, et deux pièces 100 et 200 aptes à être assemblées l'une à l'autre perpendiculairement à l'axe optique x-x du projecteur, selon les flèches F2, pour former un porte-lampe, un miroir, une partie intermédiaire porte-occulteur et une bague porte-lentille. Dans le présent exemple, ces deux parties s'aboutent dans un plan horizontal passant par l'axe x-x, ceci n'étant toutefois nullement limitatif.Referring first to figure ibis, we have schematically represented an elliptical projector according to the invention, which comprises a lamp La, a lens Le, and two parts 100 and 200 suitable for being assembled one to the other perpendicular to the optical axis x-x of the projector, according to arrows F2, to form a lamp holder, a mirror, an intermediate concealer part and a lens ring. In this example, these two parts end up in a horizontal plane passing through the x-x axis, this being in no way limiting.

    La pièce supérieure 100 comporte une zone PL' formant demi porte-lampe supérieur, une zone M' formant demi-miroir supérieur, une zone PI' formant demi-partie intermédiaire supérieure, et une zone B' formant demi-bague supérieure.The upper part 100 includes a zone PL 'forming upper half lamp holder, an area M 'forming a half mirror upper, a zone PI 'forming an intermediate half-part upper, and an area B 'forming upper half-ring.

    De même, la pièce inférieure comporte une zone PL" formant demi porte-lampe inférieur, une zone M" formant demi-miroir inférieur, une zone PI" formant demi-partie intermédiaire inférieure, et une zone B" formant demi-bague inférieure. En outre, la partie PI" porte, en saillie vers le haut et d'un seul tenant, un occulteur ou écran oblique E dont le bord supérieur se place sensiblement dans le plan focal de la lentille Le.Similarly, the lower part has a PL area " forming a lower half lamp holder, an area M "forming lower half-mirror, a PI "area forming a half-part lower intermediate, and a zone B "forming a half-ring lower. In addition, the PI part "carries, projecting towards the top and in one piece, a blackout or oblique screen E whose upper edge is placed substantially in the plane focal lens Le.

    Le projecteur selon la figure 2 comporte également un ressort R pour le maintien de la lampe La sur le porte-lampe.The projector according to Figure 2 also includes a spring R to hold the lamp La on the lamp holder.

    Ainsi l'assemblage des deux pièces 100, 200 selon les flèches F2 forme les éléments correspondants précités, la lentille Le étant emprisonnée entre les deux demi-bagues B' et B" après avoir été positionnée, préalablement à l'assemblage, au droit des demi-bagues. Les deux foyers du miroir sont notés Fa et Fb.Thus the assembly of the two parts 100, 200 according to the arrows F2 form the aforementioned corresponding elements, the lens Le being trapped between the two half-rings B ' and B "after being positioned, before assembly, in line with the half-rings. The two homes of mirror are denoted Fa and Fb.

    On observe que, grâce en particulier à cette configuration, le miroir M peut se refermer en direction de la lentille et s'étendre jusqu'au voisinage du plan focal de la lentille Le, voire au-delà de celui-ci, pour une récupération de flux sensiblement accrue par rapport aux solutions connues dans la technique des projecteurs elliptiques.We observe that, thanks in particular to this configuration, the mirror M can close in the direction of the lens and extend to the vicinity of the focal plane of the Le lens, or even beyond it, for a significantly increased flow recovery compared to solutions known in the projector technique elliptical.

    Les pièces 100 et 200 peuvent être réalisées, chacune d'un seul tenant, en tout matériau approprié, de préférence par moulage. Ainsi l'on peut réaliser des pièces en alliage d'aluminium, en alliage de zinc, en résine thermodurcissable ou en résine thermofusible haute température, cette énumération n'étant toutefois aucunement limitative. Ainsi l'on peut réaliser les pièces 100 et 200 par emboutissage de tôle d'acier, de laiton, d'aluminium ou de toute autre matière susceptible d'être emboutie.Parts 100 and 200 can be produced, each in one piece, preferably in any suitable material by molding. So we can make alloy parts aluminum, zinc alloy, resin thermosetting or high melt resin temperature, this enumeration being however in no way limiting. So we can make parts 100 and 200 by stamping sheet steel, brass, aluminum or any other material likely to be stamped.

    La fixation des deux pièces 100, 200 est réalisée par exemple par collage, par vissage ou par clipsage.The two parts 100, 200 are fixed by for example by gluing, by screwing or by clipping.

    En référence maintenant aux figures 2 à 5, on va décrire une première forme de réalisation pratique d'un tel projecteur.Referring now to Figures 2 to 5, we will describe a first practical embodiment of such projector.

    Sur ces figures et sur les suivantes, des éléments ou parties identiques ou similaires à celles de la figure ibis sont désignés dans la mesure du possible par les mêmes signes de référence.In these and the following figures, elements or parts identical or similar to those in figure ibis are designated as far as possible by the same reference signs.

    Dans cette forme de réalisation, le porte-lampe, le miroir, la pièce intermédiaire et la bague porte lentille sont constitués par deux pièces 300, 400 s'aboutant dans un plan vertical passant par l'axe optique x-x du projecteur.In this embodiment, the lamp holder, the mirror, the intermediate piece and the lens holder ring consist of two parts 300, 400 which end up in a vertical plane passing through the optical axis x-x of the projector.

    La pièce de gauche 300 (en regardant le projecteur de face) comporte une partie PL' formant demi-porte-lampe gauche, une partie M' formant demi-miroir de gauche, une demi-partie intermédiaire PI' et une demi-bague B'.The left room 300 (looking at the projector from face) has a part PL 'forming a half-lamp holder left, a part M 'forming a half-mirror on the left, a intermediate half-part PI 'and a half-ring B'.

    On observe que le miroir de type elliptique présente une étendue importante vers l'avant en se refermant progressivement jusqu'à la partie intermédiaire.We observe that the elliptical mirror presents a large extension towards the front by closing gradually to the intermediate part.

    La pièce 300 comporte une aile latérale 301 s'étendant dans un plan vertical sur toute la hauteur de la pièce, sensiblement dans la région médiane du miroir. Elle comporte également une aile 302 s'étendant dans un plan vertical passant au voisinage de l'axe optique, sur l'essentiel de la profondeur du projecteur, au-dessus et au-dessous de la pièce. L'aile 302 comporte une série de pions de centrage P.The part 300 comprises a lateral wing 301 extending in a vertical plane over the entire height of the room, substantially in the middle region of the mirror. She also includes a wing 302 extending in a plane vertical passing in the vicinity of the optical axis, on most of the depth of the projector, above and below the room. Wing 302 has a series of centering pins P.

    La partie intermédiaire PI' se compose d'une zone élargie 304, de section rectangulaire à coins arrondis, dans laquelle est formée une lumière latérale 306 d'aération. Cette partie intermédiaire PI' est fermée à l'arrière par une paroi transversale dans laquelle est formée une demi-ouverture 310, de forme générale demi-elliptique, pour le passage de la lumière. Elle est fermée à l'avant par une paroi transversale dans laquelle est formée une demi-ouverture circulaire pour recevoir la lentille Le, cette ouverture étant bordée par un bourrelet 307 dans lequel est formée une gorge 308 pour la réception d'une nervure périphérique de maintien appartenant à la lentille Le. On définit ainsi une demi-bague B' de montage de la lentille.The intermediate part PI 'consists of a zone enlarged 304, rectangular section with rounded corners, in which a side light 306 is formed ventilation. This intermediate part PI 'is closed at the rear by a transverse wall in which is formed a half-opening 310, generally semi-elliptical, for the passage of light. It's closed at the front by a transverse wall in which is formed a circular half-opening to receive the Le lens, this opening being bordered by a bead 307 in which a groove 308 is formed for reception a peripheral retaining rib belonging to the Le lens. This defines a mounting half-ring B ' of the lens.

    Par ailleurs, le long des bords supérieur et inférieur de l'aile 302 sont formés des aménagements postérieurs 303 et antérieurs 305 destinés à coopérer avec des agrafes d'assemblage A.By the way, along the top and bottom edges wing 302 are formed from rear fittings 303 and earlier 305 intended to cooperate with staples assembly A.

    La pièce 300 comporte en outre, s'étendant à environ 45° vers le haut et vers l'arrière à partir de la base de la demi-ouverture, une première partie d'occulteur ou écran oblique E' qui comporte dans sa partie haute, en saillie en direction de la pièce 400 à partir du plan vertical de raccordement des deux pièces 300 et 400, un prolongement 312.The part 300 further comprises, extending to approximately 45 ° upwards and backwards from the base of the half-opening, the first part of the screen or screen oblique E 'which has in its upper part, projecting in direction of room 400 from the vertical plane of connection of the two parts 300 and 400, an extension 312.

    La pièce 400 est réalisée essentiellement symétriquement de la pièce 300 et comporte une aile latérale 401 s'étendant dans le même plan vertical que l'aile 301, également sur toute la hauteur du projecteur. Elle comporte également une aile 402 destinée à s'accoler à l'aile 302 sur toute son étendue. L'aile 402 comporte une série de trous T destinés à recevoir les pions de centrage P lors de l'assemblage.Part 400 is essentially made symmetrically from part 300 and has a wing lateral 401 extending in the same vertical plane as wing 301, also over the entire height of the projector. It also includes a wing 402 intended to be attached to wing 302 over its entire extent. Wing 402 has a series of holes T intended to receive the centering pins P during assembly.

    La demi-partie intermédiaire PI" est symétrique de la demi-partie intermédiaire PI", avec une lumière latérale 406 d'aération. Elle est également fermée à l'arrière par une paroi transversale dans laquelle est formée une demi-ouverture 410 qui, avec la demi-ouverture 310, définit une ouverture généralement elliptique pour le passage de la lumière du second foyer du miroir vers la lentille Le. La demi-partie intermédiaire PI" est fermée à l'avant par une paroi transversale dans laquelle est formée une demi-ouverture circulaire bordée par un bourrelet 407 dans lequel est formée une gorge 408 pour la réception d'une nervure périphérique de maintien appartenant à la lentille Le. On définit ainsi une demi-bague B" de montage de la lentille.The intermediate half-part PI "is symmetrical with the intermediate half PI ", with a side light 406 ventilation. It is also closed at the back by a transverse wall in which a half-opening is formed 410 which, with the half-opening 310, defines a generally elliptical opening for the passage of the light from the second focal point of the mirror towards the lens Le. The PI "intermediate half-part is closed at the front by a transverse wall in which a half-opening is formed circular bordered by a bead 407 in which is formed a groove 408 for receiving a peripheral retaining rib belonging to the lens The. This defines a half-ring B "for mounting the lens.

    Par ailleurs, le long des bords supérieur et inférieur de l'aile 402 sont formés des aménagements postérieurs 403 et antérieurs 405 destinés à coopérer avec les aménagements homologues 303, 305 de la pièce 300 pour le clipsage des agrafes d'assemblage A.By the way, along the top and bottom edges wing 402 are formed from rear fittings 403 and earlier 405 intended to cooperate with the arrangements counterparts 303, 305 of part 300 for the clipping of assembly clips A.

    La pièce 300 comporte en outre, s'étendant à environ 45° vers le haut et vers l'arrière à partir de la base de la demi-ouverture 410, une deuxième partie d'occulteur ou écran oblique E" qui comporte un évidement destiné à recevoir le prolongement 312 du demi-écran E'.The part 300 further comprises, extending to approximately 45 ° upwards and backwards from the base of the half-opening 410, a second concealer part or oblique screen E "which has a recess intended for receive the extension 312 of the half screen E '.

    On observera ici que, grâce à cette constitution de l'écran, on assure que le bord supérieur de celui-ci, défini pratiquement entièrement par la seule pièce 300 du fait de la présence du prolongement 312, est parfaitement continu et régulier, au profit de la qualité de coupure du faisceau engendré. En particulier, la qualité de coupure du faisceau n'est pas tributaire d'un éventuel décalage de position entre les deux pièces assemblées.We will observe here that, thanks to this constitution of the screen, we ensure that the upper edge of it, defined almost entirely by the single part 300 of the made of the extension 312, is perfectly continuous and regular, to the benefit of the cut quality of the beam generated. In particular, the cut quality of the beam is not dependent on a possible shift of position between the two assembled parts.

    Par ailleurs, du fait de l'orientation oblique de l'occulteur telle que décrite et représentée, la récupération du flux lumineux émis par la lampe peut être encore accru. Une telle solution permet en effet de prolonger le miroir vers l'avant, notamment en partie basse, bien au delà du plan focal de la lentille, au voisinage duquel s'étend le bord supérieur de l'écran d'occultation. Plus précisément, les rayons lumineux renvoyés en direction du second foyer du miroir par les régions de celui-ci situées le plus en avant vont être à nouveau renvoyées vers le premier foyer, pour accroítre le flux lumineux effectivement émis par la source dans la région dudit premier foyer.Furthermore, due to the oblique orientation of the concealer as described and shown, the recovery of the luminous flux emitted by the lamp can be further increased. Such a solution makes it possible to extend the mirror forward, especially in part low, well beyond the focal plane of the lens, at vicinity of which extends the upper edge of the screen occultation. More specifically, the light rays returned to the second focus of the mirror by the the most forward regions of it are going to be at again sent back to the first home, to increase the luminous flux actually emitted by the source in the region of said first focus.

    Les figures 6 et 7 illustrent un second mode de réalisation de l'invention, qui diffère de celui des figures 2 à 5 essentiellement par une disposition différente de la lampe La.Figures 6 and 7 illustrate a second mode of realization of the invention, which differs from that of Figures 2 to 5 essentially by an arrangement different from the La lamp.

    Celle-ci s'étend en effet avec un axe vertical, avec un porte-lampe défini par deux demi-porte-lampes PL' et PL" formés à la base des demi-miroirs M' et M" à l'aplomb du premier foyer.This indeed extends with a vertical axis, with a lamp holder defined by two half-lamp holders PL 'and PL " formed at the base of the half-mirrors M 'and M "directly above the first home.

    Grâce à un tel positionnement de la lampe, le rendement lumineux peut être accru dans la mesure où l'angle solide, vu de la source, de la partie de miroir occupée par le porte-lampe peut être réduite.Thanks to such positioning of the lamp, the light output can be increased to the extent that the solid angle, seen from the source, from the mirror part occupied by the lamp holder can be reduced.

    Claims (7)

    1. Motor vehicle headlight, comprising a lamp (La), a mirror (M) of the elliptic type having a first focus (Fa) in the vicinity of which the source is situated, and a second focus (Fb), the first and second foci defining an optical axis, and a convergent lens (Le) whose focal plane (FP) is situated in the vicinity of the said second focus, in which the mirror extends axially, in the direction of the lens, beyond a plane perpendicular to the optical axis and equidistant from the two foci, characterised in that it also comprises an occulter (E; E', E") projecting in the internal space of the mirror from a region of the mirror (M) adjacent to its edge furthest away from the first focus, the occulter being formed in a single piece with the mirror.
    2. Headlight according to Claim 1, characterised in that the mirror (M) extends axially, in the direction of the lens, beyond the focal plane (FP) of the lens (Le).
    3. Headlight according to one of Claims 1 and 2, characterised in that the mirror (M) is produced in two pieces (M', M") connected to each other in a general direction transverse to the optical axis (x-x).
    4. Headlight according to Claim 3, characterised in that the two pieces (M', M"; 300, 400) are connected in a generally vertical plane in the vicinity of the optical axis (x-x) of the headlight, in that the said occulter is defined by two occulter parts (E', E") formed respectively on the two pieces (300, 400), and in that one occulter part (E') comprises a lateral extension (312), beyond the connection plane, at least in its
    5. Headlight according to one of Claims 1 to 4, characterised in that the occulter (E; E', E") is inclined obliquely towards the top and towards the bottom of the mirror (M) from the said edge furthest away from the first focus, the top edge of the occulter extending in the vicinity of the focal plane (FP) of the lens (Le).
    6. Headlight according to Claim 5, characterised in that the said inclined occulter (E; E', E") extends from the base of a light passage opening (310, 410) circumscribed by the edge of the mirror.
    7. Headlight according to one of Claims 1 to 6, characterised in that the lamp (La) is oriented vertically in the mirror (M).
    EP96401351A 1995-06-22 1996-06-20 Projection type motor vehicle headlamp comprising an improved mirror Expired - Lifetime EP0750156B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9507487 1995-06-22
    FR9507487A FR2735848B1 (en) 1995-06-22 1995-06-22 ELLIPTICAL PROJECTOR WITH IMPROVED MIRROR FOR MOTOR VEHICLE

    Publications (3)

    Publication Number Publication Date
    EP0750156A2 EP0750156A2 (en) 1996-12-27
    EP0750156A3 EP0750156A3 (en) 1997-05-28
    EP0750156B1 true EP0750156B1 (en) 2003-08-06

    Family

    ID=9480273

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96401351A Expired - Lifetime EP0750156B1 (en) 1995-06-22 1996-06-20 Projection type motor vehicle headlamp comprising an improved mirror

    Country Status (4)

    Country Link
    EP (1) EP0750156B1 (en)
    DE (1) DE69629335T2 (en)
    ES (1) ES2205006T3 (en)
    FR (1) FR2735848B1 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10140943A1 (en) 2001-08-21 2003-03-06 Hella Kg Hueck & Co vehicle headlights
    DE102021109444A1 (en) 2021-04-15 2022-10-20 HELLA GmbH & Co. KGaA Split lens holder for a lighting device
    DE102022103699A1 (en) 2022-02-17 2023-08-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft headlight

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE427143C (en) * 1920-08-06 1926-03-27 Duncan James Ritchie Headlight lamp, especially for automobiles, with reflector, projection lens and obturator
    DE3529546C1 (en) * 1985-08-17 1987-02-05 Hella Kg Hueck & Co Dimmed vehicle headlights with an ellipsoidal reflector
    JPH0821243B2 (en) * 1990-06-19 1996-03-04 株式会社小糸製作所 Projection type automobile headlamp

    Also Published As

    Publication number Publication date
    FR2735848B1 (en) 1997-08-22
    EP0750156A3 (en) 1997-05-28
    EP0750156A2 (en) 1996-12-27
    DE69629335T2 (en) 2004-06-24
    FR2735848A1 (en) 1996-12-27
    ES2205006T3 (en) 2004-05-01
    DE69629335D1 (en) 2003-09-11

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