EP0750156A2 - 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
EP0750156A2
EP0750156A2 EP96401351A EP96401351A EP0750156A2 EP 0750156 A2 EP0750156 A2 EP 0750156A2 EP 96401351 A EP96401351 A EP 96401351A EP 96401351 A EP96401351 A EP 96401351A EP 0750156 A2 EP0750156 A2 EP 0750156A2
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EP
European Patent Office
Prior art keywords
mirror
lens
projector
lamp
projector 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.)
Granted
Application number
EP96401351A
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German (de)
French (fr)
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EP0750156B1 (en
EP0750156A3 (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 EP0750156A2 publication Critical patent/EP0750156A2/en
Publication of EP0750156A3 publication Critical patent/EP0750156A3/en
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Publication of EP0750156B1 publication Critical patent/EP0750156B1/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 headlamps of the elliptical type for motor vehicles.
  • a projector of this kind conventionally consists of a lamp mounted in the region of the first focus of an elliptical mirror, and a converging lens whose focal plane passes in the vicinity of the second focus of the mirror to project onto the road. the image shows said second focus.
  • This spotlight 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 concealer.
  • the lens is directly integrated into the lens of the projector, or the projector has a separate lens, generally smooth, in front of the lens.
  • the projector further comprises an intermediate piece PI, which is mounted on the edge of the front opening of the mirror M by extending the latter forward.
  • This piece PI includes a screen or blackout E intended to give the beam the desired cutting profile, as well as a ring B intended to receive and hold a lens Le by its edges.
  • the projector mirror produced in one piece, is necessarily an open mirror, whether it is produced by molding or stamping. As a result, the recovery of the luminous flux emitted by the lamp is limited.
  • DE-C-427143 discloses a projector as defined in the preamble of claim 1.
  • this known projector is not capable of generating a beam having a clear cut.
  • an extension of the mirror, acting downstream of a first lens and upstream of a second lens is used as a means of forming the cut.
  • the use of two lenses significantly increases the cost and the difficulty of manufacturing the projector.
  • the present invention therefore aims to propose a projector of the elliptical type, in which the recovery of the luminous flux emitted by the source is significant, and which is at the same time capable of generating a beam with a clear cut-off with, moreover, a simpler structure and economic.
  • FIG. 1bis there is shown schematically an elliptical projector according to the invention, which comprises a lamp La, a lens Le, and two parts 100 and 200 able to be assembled to each other perpendicular to the optical axis xx of the headlamp, according to the arrows F2, to form a lamp holder, a mirror, an intermediate concealer part and a lens holder ring.
  • these two parts end up in a horizontal plane passing through the x-x axis, this however not being in any way limiting.
  • the upper part 100 comprises a zone PL 'forming an upper half-lamp holder, a zone M' forming an upper half-mirror, a zone PI 'forming an upper intermediate half-part, and a zone B' forming an upper half-ring.
  • the lower part comprises a zone PL "forming a lower half-lamp holder, a zone M" forming a lower half-mirror, a zone PI “forming a lower intermediate half-part, and a zone B" forming a half-ring. lower.
  • the part PI "carries, projecting upwards and in one piece, a concealer or oblique screen E, the upper edge of which is placed substantially in the focal plane of the lens Le.
  • the projector according to Figure 2 also includes a spring R for holding 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 lens Le, or even beyond it, for recovery. significantly increased in flow compared to solutions known in the art of elliptical projectors.
  • parts 100 and 200 can be produced, each in one piece, in any suitable material, preferably by molding.
  • parts can be made of aluminum alloy, zinc alloy, thermosetting resin or high temperature hot melt resin, this list however not being in any way limiting.
  • parts 100 and 200 can be produced by stamping sheet steel, brass, aluminum or any other material capable of being stamped.
  • the two parts 100, 200 are fixed 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 pieces 300, 400 which end up in a vertical plane passing through the optical axis x-x of the projector.
  • the left part 300 (looking at the headlamp from the front) comprises a part PL 'forming the left half-lamp holder, a part M' forming the left half-mirror, a half intermediate part PI 'and a half-ring B '.
  • the elliptical-type mirror has a large extent towards the front while gradually closing up to the intermediate part.
  • the part 300 comprises a lateral wing 301 extending in a vertical plane over the entire height of the part, substantially in the median region of the mirror. It also comprises a wing 302 extending in a vertical plane passing in the vicinity of the optical axis, over most of the depth of the projector, above and below the part.
  • the wing 302 comprises a series of centering pins P.
  • the intermediate part PI ′ consists of an enlarged zone 304, of rectangular section with rounded corners, in which a lateral ventilation hole 306 is formed.
  • This intermediate part PI ' is closed at the rear by a transverse wall in which is formed a half-opening 310, of generally semi-elliptical shape, for the passage of light. It is closed at the front by a transverse wall in which a circular half-opening is formed to receive the lens Le, this opening being bordered by a bead 307 in which a groove 308 is formed for the reception of a peripheral rib of support belonging to the Le lens.
  • a mounting half-ring B ' is thus defined of the lens.
  • wing 302 Furthermore, along the upper and lower edges of the wing 302 are formed rear 303 and front 305 fittings intended to cooperate with assembly clips A.
  • the part 300 further comprises, extending at about 45 ° upwards and backwards from the base of the half-opening, a first occluding part or oblique screen E 'which comprises in its upper part , projecting in the direction of the part 400 from the vertical connection plane of the two parts 300 and 400, an extension 312.
  • the part 400 is produced essentially symmetrically from the part 300 and comprises a lateral wing 401 extending in the same vertical plane as the wing 301, also over the entire height of the projector. It also includes a wing 402 intended to be attached to the wing 302 over its entire extent.
  • the 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-part PI", with a side ventilation opening 406. It is also closed at the rear by a transverse wall in which is formed a half-opening 410 which, with the half-opening 310, defines a generally elliptical opening for the passage of light from the second focal point of the mirror towards the lens Le .
  • the intermediate half-part PI is closed at the front by a transverse wall in which is formed a circular half-opening bordered by a bead 407 in which a groove 408 is formed for the reception of a peripheral retaining rib belonging to the lens Le. This defines a half-ring B "for mounting the lens.
  • rear fittings 403 and front 405 intended to cooperate with the homologous fittings 303, 305 of the part 300 for the clipping of the assembly clips A.
  • the part 300 further comprises, extending at about 45 ° upwards and backwards from the base of the half-opening 410, a second occluding part or oblique screen E "which comprises a recess intended to receive the extension 312 of the half screen E '.
  • the recovery of the light flux emitted by the lamp can be further increased.
  • Such a solution in fact makes it possible to extend the mirror towards the front, in particular in the lower part, well beyond the focal plane of the lens, in the vicinity of which extends the upper edge of the screening screen. More precisely, the light rays returned towards the second focal point of the mirror by the regions of the mirror located furthest forward will again be returned to the first focal point, in order to increase the luminous flux actually emitted by the source in the region of said region. first home.
  • Figures 6 and 7 illustrate a second embodiment of the invention, which differs from that of Figures 2 to 5 essentially by a different arrangement of the lamp La.
  • the light output can be increased insofar as the solid angle, seen from the source, of 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)

Abstract

The headlamp for a vehicle comprises a lamp (La) and an elliptical mirror (M). The mirror has a first focus (Fa) in the vicinity of the lamp source and a second focus (Fb) which is further forward w.r.t. to the lamp beam. The first and second focus points together define an optical axis (x). A converging lens (Le) is situated with its focal plane (PF) near to the second focus (Fb). The mirror extends axially in the direction of the lens, beyond a plane perpendicular to the optical axis and equidistant from the two foci. A shutter (E) is mounted inside the space enclosed by the mirror. This shutter extends from the lower front edge of the mirror (200) back up to a point near the second focus (Fb), preventing light leaving the headlamp assembly in a specific direction.

Description

La présente invention concerne les projecteurs du genre elliptique pour véhicules automobiles.The present invention relates to headlamps 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 conventionally consists of a lamp mounted in the region of the first focus of an elliptical mirror, and a converging lens whose focal plane passes in the vicinity of the second focus of the mirror to project onto the road. the image shows said second focus.

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 spotlight 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 concealer.

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.Furthermore, either the lens is directly integrated into the lens of the projector, or the projector has a separate lens, generally smooth, in front of the lens.

On a représenté sur la figure 1 ces divers éléments, dans leur construction classique.These various elements are shown in Figure 1, in their conventional 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.Thus we find a lamp The mounted in a PL lamp holder and fixed to it by an elastic hook or spring R. The PL lamp holder is assembled to the mirror M, at the rear of it, around a lamp hole. The projector further comprises an intermediate piece PI, which is mounted on the edge of the front opening of the mirror M by extending the latter forward. This piece PI includes a screen or blackout E intended to give the beam the desired cutting profile, as well as a ring B intended to receive and hold a lens Le by 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 projector mirror, produced in one piece, is necessarily an open mirror, whether it is produced by molding or stamping. As a result, the recovery of the luminous flux emitted by the lamp is limited.

On connaît également par le document JP-A-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.Also known from document JP-A-04 5007 published 01/17/94 a projector of the elliptical type in which the mirror is produced 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, does not however bring any improvement in terms of recovery of the light flux since the mirror remains an open mirror.

On connaît enfin par DE-C-427143 un projecteur tel que défini dans le préambule de la revendication 1.Finally, DE-C-427143 discloses a projector 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 accroît 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. In fact, in this known spotlight, an extension of the mirror, acting downstream of a first lens and upstream of a second lens, is used as a means of forming the cut. In addition, the use of two lenses significantly increases the cost and the difficulty of manufacturing the projector.

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, et qui soit en même temps capable d'engendrer un faisceau à coupure nette avec en outre une structure plus simple et économique.The present invention therefore aims to propose a projector of the elliptical type, in which the recovery of the luminous flux emitted by the source is significant, and which is at the same time capable of generating a beam with a clear cut-off with, moreover, a simpler structure and economic.

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

Des aspects préférés de ce projecteur sont définis dans les sous-revendications.Preferred aspects of this projector are defined in the subclaims.

D'autres aspects, buts et avantages de la présente invention apparaîtront 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 1bis 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 non-limiting example and made with reference to the accompanying drawings, in which :
  • Figure 1 is a schematic view in axial section of a projector of the elliptical type of the technique anterior,
  • FIG. 1a 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 headlamp 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 1bis, 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 firstly to Figure 1bis, there is shown schematically an elliptical projector according to the invention, which comprises a lamp La, a lens Le, and two parts 100 and 200 able to be assembled to each other perpendicular to the optical axis xx of the headlamp, according to the arrows F2, to form a lamp holder, a mirror, an intermediate concealer part and a lens holder ring. In the present example, these two parts end up in a horizontal plane passing through the x-x axis, this however not being in any 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 comprises a zone PL 'forming an upper half-lamp holder, a zone M' forming an upper half-mirror, a zone PI 'forming an upper intermediate half-part, and a zone B' forming an 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 comprises a zone PL "forming a lower half-lamp holder, a zone M" forming a lower half-mirror, a zone PI "forming a lower intermediate half-part, and a zone B" forming a half-ring. lower. In addition, the part PI "carries, projecting upwards and in one piece, a concealer or oblique screen E, the upper edge of which is placed substantially in the focal plane of the 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 for holding 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 forms the aforementioned corresponding elements, the lens Le being trapped between the two half-rings B 'and B "after having been positioned, prior to assembly, in line with the The two focal points of the 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.It is observed that, in particular thanks 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 lens Le, or even beyond it, for recovery. significantly increased in flow compared to solutions known in the art of elliptical projectors.

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.The parts 100 and 200 can be produced, each in one piece, in any suitable material, preferably by molding. Thus, parts can be made of aluminum alloy, zinc alloy, thermosetting resin or high temperature hot melt resin, this list however not being in any way limiting. Thus, parts 100 and 200 can be produced by stamping sheet steel, brass, aluminum or any other material capable of being 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 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 a projector.

Sur ces figures et sur les suivantes, des éléments ou parties identiques ou similaires à celles de la figure 1bis 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 of FIG. 1a 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 pieces 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 part 300 (looking at the headlamp from the front) comprises a part PL 'forming the left half-lamp holder, a part M' forming the left half-mirror, a half intermediate 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.It is observed that the elliptical-type mirror has a large extent towards the front while gradually closing up 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 part, substantially in the median region of the mirror. It also comprises a wing 302 extending in a vertical plane passing in the vicinity of the optical axis, over most of the depth of the projector, above and below the part. The wing 302 comprises 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 an enlarged zone 304, of rectangular section with rounded corners, in which a lateral ventilation hole 306 is formed. This intermediate part PI 'is closed at the rear by a transverse wall in which is formed a half-opening 310, of generally semi-elliptical shape, for the passage of light. It is closed at the front by a transverse wall in which a circular half-opening is formed to receive the lens Le, this opening being bordered by a bead 307 in which a groove 308 is formed for the reception of a peripheral rib of support belonging to the Le lens. A mounting half-ring B 'is thus defined 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.Furthermore, along the upper and lower edges of the wing 302 are formed rear 303 and front 305 fittings intended to cooperate with 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, 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 at about 45 ° upwards and backwards from the base of the half-opening, a first occluding part or oblique screen E 'which comprises in its upper part , projecting in the direction of the part 400 from the vertical connection plane 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.The part 400 is produced essentially symmetrically from the part 300 and comprises a lateral wing 401 extending in the same vertical plane as the wing 301, also over the entire height of the projector. It also includes a wing 402 intended to be attached to the wing 302 over its entire extent. The 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-part PI", with a side ventilation opening 406. It is also closed at the rear by a transverse wall in which is formed a half-opening 410 which, with the half-opening 310, defines a generally elliptical opening for the passage of light from the second focal point of the mirror towards the lens Le . The intermediate half-part PI "is closed at the front by a transverse wall in which is formed a circular half-opening bordered by a bead 407 in which a groove 408 is formed for the reception of a peripheral retaining rib belonging to the lens Le. 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 of the wing 402 are formed rear fittings 403 and front 405 intended to cooperate with the homologous fittings 303, 305 of the part 300 for the clipping of the 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 at about 45 ° upwards and backwards from the base of the half-opening 410, a second occluding part or oblique screen E "which comprises a recess intended to 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.It will be observed here that, thanks to this constitution of the screen, it is ensured that the upper edge thereof, defined almost entirely by the single piece 300 due to the presence of the extension 312, is perfectly continuous and regular, to the benefit of the quality of cut of the generated beam. In particular, the quality of the beam cut-off is not dependent on a possible position shift 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 accroître le flux lumineux effectivement émis par la source dans la région dudit premier foyer.Furthermore, due to the oblique orientation of the shield as described and shown, the recovery of the light flux emitted by the lamp can be further increased. Such a solution in fact makes it possible to extend the mirror towards the front, in particular in the lower part, well beyond the focal plane of the lens, in the vicinity of which extends the upper edge of the screening screen. More precisely, the light rays returned towards the second focal point of the mirror by the regions of the mirror located furthest forward will again be returned to the first focal point, in order to increase the luminous flux actually emitted by the source in the region of said region. first home.

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 embodiment of the invention, which differs from that of Figures 2 to 5 essentially by a different arrangement of the lamp La.

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 focus.

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 a positioning of the lamp, the light output can be increased insofar as the solid angle, seen from the source, of the mirror part occupied by the lamp holder can be reduced.

Bien entendu, la présente invention n'est nullement limitée aux formes de réalisation décrites et représentées, mais l'homme de l'art saura y apporter toute variante ou modification conforme à son esprit.Of course, the present invention is not limited to the embodiments described and shown, but those skilled in the art will be able to make any variant or modification in accordance with his spirit.

Claims (7)

Projecteur pour véhicule automobile, comprenant une lampe (La), un miroir (M) du genre elliptique possédant un premier foyer (Fa) au voisinage duquel la source est située, et un second foyer (Fb), les premier et second foyers définissant un axe optique, et une lentille convergente (Le) dont un plan focal (PF) se situe au voisinage dudit second foyer, dans lequel le miroir s'étend axialement, en direction de la lentille, au delà d'un plan perpendiculaire à l'axe optique et équidistant des deux foyers, caractérisé en ce qu'il comprend en outre un occulteur (E; E', E") en saillie dans l'espace intérieur du miroir à partir d'une région du miroir (M) adjacente à son bord le plus éloigné du premier foyer,Projector for a motor vehicle, comprising a lamp (La), a mirror (M) of the elliptical type having a first focal point (Fa) in the vicinity of which the source is located, and a second focal point (Fb), the first and second focal points defining a optical axis, and a converging lens (Le) of which a focal plane (PF) is located in the vicinity of said second focal point, in which the mirror extends axially, in the direction of the lens, beyond a plane perpendicular to the optical and equidistant axis of the two focal points, characterized in that it further comprises a concealer (E; E ', E ") projecting into the interior space of the mirror from a region of the mirror (M) adjacent to its edge farthest from the first focus, Projecteur selon la revendication 1, caractérisé en ce que le miroir (M) s'étend axialement, en direction de la lentille, au-delà du plan focal (PF) de la lentille (Le).Projector according to claim 1, characterized in that the mirror (M) extends axially, in the direction of the lens, beyond the focal plane (PF) of the lens (Le). Projecteur selon l'une des revendications 1 et 2, caractérisé en ce que le miroir (M) est réalisé en deux pièces (M', M") assemblées l'une à l'autre dans une direction générale transversale à l'axe optique (x-x).Projector according to either of Claims 1 and 2, characterized in that the mirror (M) is produced in two parts (M ', M ") joined to one another in a general direction transverse to the optical axis (xx). Projecteur selon la revendication 3, caractérisé en ce que les deux pièces (M', M"; 300, 400) se raccordent dans un plan généralement vertical au voisinage de l'axe optique (x-x) du projecteur, en ce que ledit occulteur est défini par deux parties d'occulteur (E', E") formées respectivement sur les deux pièces (300, 400), et en ce qu'une partie d'occulteur (E') comporte un prolongement latéral (312), au delà du plan de raccordement, au moins dans sa partie supérieure.Projector according to claim 3, characterized in that the two parts (M ', M "; 300, 400) are connected in a generally vertical plane in the vicinity of the optical axis (xx) of the projector, in that said blackout is defined by two blackout parts (E ', E ") formed respectively on the two parts (300, 400), and in that a blackout part (E') has a lateral extension (312), beyond of the connection plan, at least in its upper part. Projecteur selon l'une des revendications 1 à 4, caractérisé en ce que l'occulteur (E; E', E") est incliné en oblique vers le haut et vers le fond du miroir (M) à partir dudit bord le plus éloigné du premier foyer, le bord supérieur de l'occulteur s'étendant au voisinage du plan focal (PF) de la lentille (Le).Projector according to one of claims 1 to 4, characterized in that the screen (E; E ', E ") is inclined obliquely upwards and towards the bottom of the mirror (M) from said most distant edge of the first focal point, the upper edge of the concealer extending in the vicinity of the focal plane (PF) of the lens (Le). Projecteur selon la revendication 5, caractérisé en ce que ledit occulteur incliné (E; E', E") s'étend à partir de la base d'une ouverture de passage de lumière (310, 410) circonscrite par le bord du miroir.Projector according to claim 5, characterized in that said inclined concealer (E; E ', E ") extends from the base of a light passage opening (310, 410) circumscribed by the edge of the mirror. Projecteur selon l'une des revendications 1 à 6, caractérisé en ce que la lampe (La) est orientée verticalement dans le miroir (M).Projector according to one of claims 1 to 6, characterized 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
FR9507487A FR2735848B1 (en) 1995-06-22 1995-06-22 ELLIPTICAL PROJECTOR WITH IMPROVED MIRROR FOR MOTOR VEHICLE
FR9507487 1995-06-22

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

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EP96401351A Expired - Lifetime EP0750156B1 (en) 1995-06-22 1996-06-20 Projection type motor vehicle headlamp comprising an improved mirror

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1286108A2 (en) 2001-08-21 2003-02-26 Hella KG Hueck & Co. Vehicle headlamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (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
EP0212211A2 (en) * 1985-08-17 1987-03-04 Hella KG Hueck & Co. Dipped-beam headlamp with an elliptical reflector
FR2663406A1 (en) * 1990-06-19 1991-12-20 Koito Mfg Co Ltd PROJECTOR-TYPE VEHICLE HEADLIGHT IN WHICH THE RADIATION OF HEAT IS IMPROVED.

Patent Citations (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
EP0212211A2 (en) * 1985-08-17 1987-03-04 Hella KG Hueck & Co. Dipped-beam headlamp with an elliptical reflector
FR2663406A1 (en) * 1990-06-19 1991-12-20 Koito Mfg Co Ltd PROJECTOR-TYPE VEHICLE HEADLIGHT IN WHICH THE RADIATION OF HEAT IS IMPROVED.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1286108A2 (en) 2001-08-21 2003-02-26 Hella KG Hueck & Co. Vehicle headlamp

Also Published As

Publication number Publication date
DE69629335D1 (en) 2003-09-11
EP0750156B1 (en) 2003-08-06
ES2205006T3 (en) 2004-05-01
FR2735848A1 (en) 1996-12-27
FR2735848B1 (en) 1997-08-22
DE69629335T2 (en) 2004-06-24
EP0750156A3 (en) 1997-05-28

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