EP1139017A1 - Motor vehicle headlamp emitting light beams having different beam patterns - Google Patents

Motor vehicle headlamp emitting light beams having different beam patterns Download PDF

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Publication number
EP1139017A1
EP1139017A1 EP01400639A EP01400639A EP1139017A1 EP 1139017 A1 EP1139017 A1 EP 1139017A1 EP 01400639 A EP01400639 A EP 01400639A EP 01400639 A EP01400639 A EP 01400639A EP 1139017 A1 EP1139017 A1 EP 1139017A1
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EP
European Patent Office
Prior art keywords
cover
rotation
axis
projector
edge
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Granted
Application number
EP01400639A
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German (de)
French (fr)
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EP1139017B1 (en
Inventor
Emanuelle c/o Valeo Vision Michel
Jean Louis c/o Valeo Vision Velay
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP1139017A1 publication Critical patent/EP1139017A1/en
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Anticipated expiration legal-status Critical
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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
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges

Definitions

  • the present invention relates generally to elliptical type projectors for motor vehicles.
  • the invention relates to a headlight for a motor vehicle, comprising a light source, a reflector of the elliptical type, a first focus of which is located near the light source, a converging lens with a focal plane passing through near the second focus of the reflector, a cover being provided between the reflector and the lens converging and having a concealing edge defining a predetermined cutting profile for the light beam emitted by the projector along an optical axis, the cover being movable selectively between two extreme positions under the effect of tilting means, a first position in which the concealment edge of the cover is positioned on the path of the light rays to form a light beam having the predetermined cutting profile, and a second position in which the masking edge of the cover is positioned outside of the path of the light rays to form a second light beam without interruption, the cover being movable about a substantially horizontal axis of rotation and perpendicular to the optical axis of the projector, the tilting means comprising an
  • the electromagnet controls the tilting of the movable cover by through a link interposed between the electromagnet core and a lever arm secured to the movable cover, and a spring biases the lever arm in tension in a position where the movable cover is vertical.
  • the stroke of the electromagnet core is important due to the presence of the lever arm, so that the electromagnet must be specially sized to perform this function, and all the more so since the electromagnet is of the swallower type.
  • the return spring works in extensions of relatively large amplitudes during the tilting of the mobile cover, these repeated extensions being harmful to its lifespan.
  • the movement of the link results from the combination of a translation and a rotation, so that the size of the mechanism for actuating the movable cover is relatively large.
  • the present invention is placed in this context and it aims to provide a projector can selectively emit beams of different profiles determined by the position of a mobile cover, the positions of this mobile cover being precisely defined, the mobile cover being set in motion by a reliable, simple and space-saving device, the movement of this cache taking place as quietly as possible.
  • a first end of the actuating rod is integral the core of an electromagnet movable in translation in a housing comprising a coil, the core being biased by a compression spring bearing against an internal wall of the housing, and a second end of the actuating rod has an oblong slot extending in a direction substantially perpendicular to the direction of actuation of the rod and the axis of rotation of the cover.
  • a headlight for a motor vehicle which comprises a lamp 10 mounted in the bottom of a reflector 20 of the elliptical type, so that the light source 11 of the lamp 10 is located in the immediate vicinity of a first focus of the reflector 20.
  • the lamp 10 may consist of a conventional filament lamp, a halogen lamp or a discharge lamp.
  • the projector also includes a converging lens 70 (not shown in the Figure 1), mounted on an intermediate part 40 of the projector, this intermediate part being integral with the reflector 10.
  • the intermediate piece 40 is such that the focal plane of the lens 70 passes in the immediate vicinity of the second focus of the reflector.
  • the projector finally comprises a movable cover 50 disposed between the reflector 20 and the lens 70, the movable cover 50 being mounted in a support piece 30, itself integral of the reflector 20 and of the intermediate piece 40.
  • the cover 50 located, in its vertical position, in a plane in the immediate vicinity of the focal plane of the lens 70, has an edge 51 capable of defining in the focal plane of the lens 70 a predetermined cutoff profile for the beam emitted by the projector, this cutoff profile being imposed by various legislations.
  • the movable cover 50 is pivotally mounted around a pivot axis Y, generally horizontal and perpendicular to the optical axis X of the projector.
  • the pivoting mounting of the movable cover 50 on the workpiece support 30 of the projector is produced by means of a shaft 54, introduced through the cover 50 in orifices 53 formed on the latter so that the shaft 54 is secured of the cover 50, for example by crimping, the shaft 54 being mounted in two or two bearings hinges 31 and 32 of the support part 30 of the projector so as to be free to rotate in these landings.
  • the movable cover 50 is capable of being moved by tilting means 60, the cover 50 being able to be brought selectively into two positions, a first substantially vertical position in which the edge 51 of the cover 50 is located in the focal plane of the lens 70 on the path of the light rays to form a light beam with a cutoff profile predetermined by the shape of the edge 51, for example a code bundle for right or left traffic, and a second substantially horizontal position in which the edge 51 of the cover is located outside the path of the light rays to form a unbroken light beam, for example a driving beam.
  • the movable cover 50 consists of a blade which has a thickness such that when the cover is positioned substantially horizontally in the road position, it does not or almost does not obscure the light beam emitted by the light source 11 and reflected by the reflector.
  • the means for tilting 60 of the cover 50 around the axis Y includes a means maneuver comprising an actuating rod 61 one end of which is integral with the core 62 of an electromagnet 60, capable of pushing or pulling the rod 61 in a direction substantially parallel to the X axis.
  • the electromagnet 60 comprises a housing 63 in which are located a coil 64 and a core 62 in a conventional manner.
  • the core 62 is movable in translation at inside the housing 63 and it is connected to the end of the actuating rod 61.
  • the housing 63 can be fixed on a base, itself fixed on the support piece 30 or integral with this support piece, the base can also be fixed to the reflector 20.
  • the core 62 is subjected to the action of a return spring 65, which biases the core in a rear rest position.
  • a return spring 65 which biases the core in a rear rest position.
  • the other end of the actuating rod 61 is secured to a tip 66, by example of a generally parallelepiped shape, comprising an oblong lumen 67, extending in a direction substantially perpendicular to the direction of actuation of the rod 61 and to the axis of rotation Y of the cover 50.
  • the light oblong 67 is formed in the actuating rod 61, the latter being for example flattened and pierced with an oblong opening, or by a particular configuration of the rod 61, the latter being for example folded several times on itself in the manner of a paper clip.
  • the oblong light 67 is intended to receive one end of the shaft 54.
  • This end is folded twice in succession at right angles so to form a two-bearing crankshaft, the crankshaft bearing outside the axis of rotation Y of the cover being received in the oblong opening 67 of the endpiece 66 and being susceptible to slide freely in this oblong light.
  • the cover 50 has two lateral tabs 55 which come to bear when the cover 50 returns to its vertical position, against stops 33 formed on lugs of the reflector 20 and passing through openings 34 formed in the nearby support piece 30 edges of the central opening 35 of the support piece 30.
  • the stops 33 thus define precisely with respect to the reflector 20, under the effect of the bias of the return spring 65, the vertical position of the cover 50, so that the edge 51 is located at the focus of the reflector 20 and in the focal plane of the converging lens 70.
  • the intermediate piece 40 also has bearing surfaces 41 on which come in support the side tabs 55 of the cover 50, and which serve as stops limiting the movement of tilting the cover 50 forward.
  • the blade constituting the cover 50 is extended below the axis of rotation Y, and it is integral with a counterweight 52. It can be provided that the counterweight 52 is mounted on the blade or is formed in one piece with this blade.
  • the counterweight 52 has the effect that, in the vertical position of the cover 50, the center of gravity of the blade is located below its axis of rotation Y, and the cover 50 thus tends naturally to be placed in this vertical position.
  • the blade constituting the cover 50 is planar, and the axis of rotation Y of the cover 50 is contained in the plane of the blade, or it is very close to it.
  • the edge 51 passes from an extreme position, for example vertical, to another extreme position, for example horizontal, continuously variable.
  • a "rebound" phenomenon which appears when the edge of the cache cover is located behind the vertical plane passing through the axis of rotation of the cover.
  • the edge of the cover when switching the cache to at the front, the edge of the cover first follows an ascending arc, then a descending arc. This then results in an undesirable movement in the beam emitted by the projector.
  • the illumination limit defined by the edge of the cover in cooperation with the converging lens in cooperation with the converging lens.
  • the particular arrangement according to the present invention of the axis of rotation of the cover 50 avoids such a disadvantage.
  • the present invention is not limited to the embodiment which has been described, but it is on the contrary likely to receive by the skilled person many variants that fall within its scope.
  • the electromagnet is fixed on the intermediate piece and pulls on the cover to tilt it, instead of pushing it as described above.
  • the actuating rod constitutes a rack, meshing with a toothed pinion integral of the cache drive shaft.

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

Abstract

The headlamp (40) has a screen (50) that swings upright for low beam operation. The screen is between the reflector (20) and the front lens of the headlamp. The screen is operated by an electromagnet (60) which moves a rod (61) parallel to the optical axis. The rod ends in a block (66) with an elongated slot for the end of a crank (54) at the end of the shaft supporting the screen.

Description

La présente invention concerne de manière générale les projecteurs de type elliptique pour véhicules automobiles.The present invention relates generally to elliptical type projectors for motor vehicles.

De manière plus précise, l'invention concerne un projecteur pour véhicule automobile, comprenant une source lumineuse, un réflecteur du genre elliptique, dont un premier foyer est situé au voisinage de la source lumineuse, une lentille convergente dont un plan focal passe au voisinage du second foyer du réflecteur, un cache étant prévu entre le réflecteur et la lentille convergente et comportant un bord d'occultation définissant un profil de coupure prédéterminé pour le faisceau lumineux émis par le projecteur selon un axe optique, le cache étant mobile sélectivement entre deux positions extrêmes sous l'effet de moyens de basculement, une première position dans laquelle le bord d'occultation du cache est positionné sur le trajet des rayons lumineux pour former un faisceau lumineux ayant le profil de coupure prédéterminé, et une deuxième position dans laquelle le bord d'occultation du cache est positionné en dehors du trajet des rayons lumineux pour former un deuxième faisceau lumineux sans coupure, le cache étant mobile autour d'un axe de rotation sensiblement horizontal et perpendiculaire à l'axe optique du projecteur, les moyens de basculement comportant une tige d'actionnement mobile en translation dans une direction sensiblement parallèle à l'axe optique du projecteur.More specifically, the invention relates to a headlight for a motor vehicle, comprising a light source, a reflector of the elliptical type, a first focus of which is located near the light source, a converging lens with a focal plane passing through near the second focus of the reflector, a cover being provided between the reflector and the lens converging and having a concealing edge defining a predetermined cutting profile for the light beam emitted by the projector along an optical axis, the cover being movable selectively between two extreme positions under the effect of tilting means, a first position in which the concealment edge of the cover is positioned on the path of the light rays to form a light beam having the predetermined cutting profile, and a second position in which the masking edge of the cover is positioned outside of the path of the light rays to form a second light beam without interruption, the cover being movable about a substantially horizontal axis of rotation and perpendicular to the optical axis of the projector, the tilting means comprising an actuating rod movable in translation in a direction substantially parallel to the optical axis of the projector.

On connaít du document DE-A-3 806 658 un tel projecteur, qui présente de nombreux inconvénients. En effet, l'électroaimant commande le basculement du cache mobile par l'intermédiaire d'une biellette interposée entre le noyau de l'électroaimant et un bras de levier solidaire du cache mobile, et un ressort sollicite en traction le bras de levier dans une position où le cache mobile est vertical. Outre le fait que la position du bord d'occultation du cache n'est pas définie avec la précision souhaitée dans le plan focal de la lentille convergente, la course du noyau de l'électroaimant est importante du fait de la présence du bras de levier, de sorte que l'électroaimant doit être spécialement dimensionné pour accomplir cette fonction, et ce d'autant plus que l'électroaimant est du type avaleur. De plus, le ressort de rappel fonctionne en extensions de relativement grandes amplitudes lors du basculement du cache mobile, ces extensions répétées étant nuisibles à sa durée de vie. Enfin, le mouvement de la biellette résulte de la combinaison d'une translation et d'une rotation, de sorte que l'encombrement du mécanisme d'actionnement du cache mobile est relativement important. We know from document DE-A-3 806 658 such a projector, which has many disadvantages. Indeed, the electromagnet controls the tilting of the movable cover by through a link interposed between the electromagnet core and a lever arm secured to the movable cover, and a spring biases the lever arm in tension in a position where the movable cover is vertical. In addition to the fact that the position of the concealment edge of the cover is not defined with the desired precision in the focal plane of the converging lens, the stroke of the electromagnet core is important due to the presence of the lever arm, so that the electromagnet must be specially sized to perform this function, and all the more so since the electromagnet is of the swallower type. In addition, the return spring works in extensions of relatively large amplitudes during the tilting of the mobile cover, these repeated extensions being harmful to its lifespan. Finally, the movement of the link results from the combination of a translation and a rotation, so that the size of the mechanism for actuating the movable cover is relatively large.

On connaít également du document DE-A-198 43 287 un projecteur de type elliptique à faisceau variable, dans lequel un actionneur entraíne en translation une crémaillère qui entraíne en rotation une roue dentée fixée sur un axe solidaire du cache. Lorsque l'actionneur entraíne la crémaillère, le cache peut être déplacé dans une parmi trois positions. L'actionneur doit alors être commandé de façon très précise pour que le cache occupe lui-même très précisément chacune de ses positions prédéterminées.We also know from document DE-A-198 43 287 an elliptical type projector with variable beam, in which an actuator drives in translation a rack which drives in rotation a toothed wheel fixed on an axis integral with the cover. When the actuator drives the rack, the cover can be moved to one of three positions. The actuator must therefore be ordered very precisely so that the cover itself occupies very precisely each of its predetermined positions.

La présente invention se place dans ce contexte et elle a pour but de proposer un projecteur pouvant émettre sélectivement des faisceaux de profils différents déterminés par la position d'un cache mobile, les positions de ce cache mobile étant définies avec précision, le cache mobile étant mis en mouvement par un dispositif fiable, simple et peu encombrant, le mouvement de ce cache s'effectuant le plus silencieusement possible.The present invention is placed in this context and it aims to provide a projector can selectively emit beams of different profiles determined by the position of a mobile cover, the positions of this mobile cover being precisely defined, the mobile cover being set in motion by a reliable, simple and space-saving device, the movement of this cache taking place as quietly as possible.

Selon la présente invention, une première extrémité de la tige d'actionnement est solidaire du noyau d'un électroaimant mobile en translation dans un boítier comprenant une bobine, le noyau étant sollicité par un ressort de compression en appui contre une paroi interne du boítier, et une deuxième extrémité de la tige d'actionnement comporte une lumière oblongue s'étendant dans une direction sensiblement perpendiculaire à la direction d'actionnement de la tige et à l'axe de rotation du cache.According to the present invention, a first end of the actuating rod is integral the core of an electromagnet movable in translation in a housing comprising a coil, the core being biased by a compression spring bearing against an internal wall of the housing, and a second end of the actuating rod has an oblong slot extending in a direction substantially perpendicular to the direction of actuation of the rod and the axis of rotation of the cover.

Selon d'autres caractéristiques avantageuses et non limitatives du projecteur selon l'invention :

  • la lumière oblongue est formée dans un embout solidaire de la tige d'actionnement ;
  • une extrémité de l'arbre est repliée deux fois de suite à angle droit de manière à former un vilebrequin à deux paliers, un palier du vilebrequin en dehors de l'axe de rotation du cache étant reçu dans la lumière oblongue ;
  • le cache est formé dans une lame comportant, sur son côté opposé à celui sur lequel est formé le bord d'occultation par rapport à l'axe de rotation, un contrepoids, et
  • la lame constituant le cache est plane, et l'axe de rotation du cache est contenu dans le plan de la lame ou est disposé en arrière du plan vertical passant par le bord d'occultation du cache.
According to other advantageous and non-limiting characteristics of the projector according to the invention:
  • the oblong opening is formed in an end piece integral with the actuating rod;
  • one end of the shaft is folded twice in succession at a right angle so as to form a crankshaft with two bearings, a bearing of the crankshaft outside the axis of rotation of the cover being received in the oblong slot;
  • the cover is formed in a blade comprising, on its side opposite to that on which the concealing edge is formed relative to the axis of rotation, a counterweight, and
  • the blade constituting the cover is flat, and the axis of rotation of the cover is contained in the plane of the blade or is arranged behind the vertical plane passing through the obscuring edge of the cover.

D'autres buts, caractéristiques et avantages de la présente invention ressortiront clairement de la description qui va maintenant être faite d'un exemple de réalisation donné à titre non limitatif en référence aux dessins annexés sur lesquels :

  • la Figure 1 représente une vue en perspective éclatée d'un mode de réalisation du projecteur selon la présente invention ;
  • la Figure 2 représente une vue en coupe horizontale du projecteur selon la présente invention ;
  • la Figure 3 représente une vue en coupe selon la ligne III-III de la Figure 2,
  • la Figure 4 représente une vue en coupe selon la ligne IV-IV de la Figure 3.
Other objects, characteristics and advantages of the present invention will emerge clearly from the description which will now be made of an exemplary embodiment given without limitation with reference to the appended drawings in which:
  • Figure 1 shows an exploded perspective view of an embodiment of the projector according to the present invention;
  • Figure 2 shows a horizontal sectional view of the projector according to the present invention;
  • FIG. 3 represents a sectional view along line III-III of FIG. 2,
  • Figure 4 shows a sectional view along line IV-IV of Figure 3.

On a représenté sur les Figures un projecteur pour véhicule automobile, qui comporte une lampe 10 montée dans le fond d'un réflecteur 20 du type elliptique, de telle sorte que la source lumineuse 11 de la lampe 10 soit située au voisinage immédiat d'un premier foyer du réflecteur 20. La lampe 10 peut être constituée d'une lampe à filament conventionnelle, d'une lampe à halogène ou encore d'une lampe à décharge.There is shown in the Figures a headlight for a motor vehicle, which comprises a lamp 10 mounted in the bottom of a reflector 20 of the elliptical type, so that the light source 11 of the lamp 10 is located in the immediate vicinity of a first focus of the reflector 20. The lamp 10 may consist of a conventional filament lamp, a halogen lamp or a discharge lamp.

Le projecteur comporte également une lentille convergente 70 (non représentée sur la Figure 1), montée sur une pièce intermédiaire 40 du projecteur, cette partie intermédiaire étant solidaire du réflecteur 10. La pièce intermédiaire 40 est telle que le plan focal de la lentille 70 passe au voisinage immédiat du deuxième foyer du réflecteur.The projector also includes a converging lens 70 (not shown in the Figure 1), mounted on an intermediate part 40 of the projector, this intermediate part being integral with the reflector 10. The intermediate piece 40 is such that the focal plane of the lens 70 passes in the immediate vicinity of the second focus of the reflector.

Le projecteur comporte enfin un cache mobile 50 disposé entre le réflecteur 20 et la lentille 70, le cache mobile 50 étant monté dans une pièce de support 30, elle-même solidaire du réflecteur 20 et de la pièce intermédiaire 40.The projector finally comprises a movable cover 50 disposed between the reflector 20 and the lens 70, the movable cover 50 being mounted in a support piece 30, itself integral of the reflector 20 and of the intermediate piece 40.

L'ensemble des éléments que l'on vient de décrire est monté de façon conventionnelle, et non représentée, dans un boítier fermé par une glace.All of the elements that have just been described are mounted in a conventional manner, and not shown, in a case closed by a glass.

Le cache 50, situé, dans sa position verticale, dans un plan à proximité immédiate du plan focal de la lentille 70, présente un bord 51 apte à définir dans le plan focal de la lentille 70 un profil de coupure prédéterminé pour le faisceau émis par le projecteur, ce profil de coupure étant imposé par diverses législations.The cover 50, located, in its vertical position, in a plane in the immediate vicinity of the focal plane of the lens 70, has an edge 51 capable of defining in the focal plane of the lens 70 a predetermined cutoff profile for the beam emitted by the projector, this cutoff profile being imposed by various legislations.

Le cache mobile 50 est monté à pivotement autour d'un axe de pivotement Y, généralement horizontal et perpendiculaire à l'axe optique X du projecteur.The movable cover 50 is pivotally mounted around a pivot axis Y, generally horizontal and perpendicular to the optical axis X of the projector.

De façon plus précise, le montage à pivotement du cache mobile 50 sur la pièce de support 30 du projecteur est réalisé par l'intermédiaire d'un arbre 54, introduit au travers du cache 50 dans des orifices 53 formés sur ce dernier de manière à ce que l'arbre 54 soit solidarisé du cache 50, par exemple par sertissage, l'arbre 54 étant monté dans deux paliers ou deux paumelles 31 et 32 de la pièce de support 30 du projecteur de manière à être libre en rotation dans ces paliers.More specifically, the pivoting mounting of the movable cover 50 on the workpiece support 30 of the projector is produced by means of a shaft 54, introduced through the cover 50 in orifices 53 formed on the latter so that the shaft 54 is secured of the cover 50, for example by crimping, the shaft 54 being mounted in two or two bearings hinges 31 and 32 of the support part 30 of the projector so as to be free to rotate in these landings.

Le cache mobile 50 est susceptible d'être mis en mouvement par des moyens de basculement 60, le cache 50 pouvant être amené sélectivement dans deux positions, une première position sensiblement verticale dans laquelle le bord 51 du cache 50 est situé dans le plan focal de la lentille 70 sur le trajet des rayons lumineux pour former un faisceau lumineux avec un profil de coupure prédéterminé par la forme du bord 51, par exemple un faisceau de code pour trafic à droite ou à gauche, et une deuxième position sensiblement horizontale dans laquelle le bord 51 du cache est situé en dehors du trajet des rayons lumineux pour former un faisceau lumineux sans coupure, par exemple un faisceau de route.The movable cover 50 is capable of being moved by tilting means 60, the cover 50 being able to be brought selectively into two positions, a first substantially vertical position in which the edge 51 of the cover 50 is located in the focal plane of the lens 70 on the path of the light rays to form a light beam with a cutoff profile predetermined by the shape of the edge 51, for example a code bundle for right or left traffic, and a second substantially horizontal position in which the edge 51 of the cover is located outside the path of the light rays to form a unbroken light beam, for example a driving beam.

Le cache mobile 50 est constitué d'une lame qui présente une épaisseur telle que lorsque le cache est positionné de manière sensiblement horizontale dans la position route, il n'occulte pas ou pratiquement pas le faisceau lumineux émis par la source lumineuse 11 et réfléchi par le réflecteur.The movable cover 50 consists of a blade which has a thickness such that when the cover is positioned substantially horizontally in the road position, it does not or almost does not obscure the light beam emitted by the light source 11 and reflected by the reflector.

Les moyens de basculement 60 du cache 50 autour de l'axe Y comprennent un moyen de manoeuvre comportant une tige d'actionnement 61 dont une extrémité est solidaire du noyau 62 d'un électroaimant 60, apte à pousser ou à tirer la tige 61 dans une direction sensiblement parallèle à l'axe X. L'électroaimant 60 comporte un boítier 63 dans lequel sont situés une bobine 64 et un noyau 62 de façon classique. Le noyau 62 est mobile en translation à l'intérieur du boítier 63 et il est relié à l'extrémité de la tige d'actionnement 61. En variante, on peut prévoir que la tige 61 fasse une seule pièce avec le noyau 62. Le boítier 63 peut être fixé sur un socle, lui-même fixé sur la pièce de support 30 ou solidaire de cette pièce de support, le socle pouvant également être fixé sur le réflecteur 20.The means for tilting 60 of the cover 50 around the axis Y includes a means maneuver comprising an actuating rod 61 one end of which is integral with the core 62 of an electromagnet 60, capable of pushing or pulling the rod 61 in a direction substantially parallel to the X axis. The electromagnet 60 comprises a housing 63 in which are located a coil 64 and a core 62 in a conventional manner. The core 62 is movable in translation at inside the housing 63 and it is connected to the end of the actuating rod 61. As a variant, we can predict that the rod 61 is one piece with the core 62. The housing 63 can be fixed on a base, itself fixed on the support piece 30 or integral with this support piece, the base can also be fixed to the reflector 20.

Le noyau 62 est soumis à l'action d'un ressort de rappel 65, qui sollicite le noyau dans une position arrière de repos. Lorsque la bobine 64 de l'électroaimant est alimentée en courant, elle déplace le noyau 62 de sorte qu'elle entraíne vers l'avant la tige d'actionnement 61, tout en comprimant le ressort de rappel 65 contre la paroi interne 63 du boítier. Lorsque la bobine 64 de l'électroaimant n'est plus alimentée en courant, le noyau 62 n'est plus sollicité par la bobine 64 et le ressort de rappel 65 ramène le noyau 62 et la tige 61 vers la position arrière de repos.The core 62 is subjected to the action of a return spring 65, which biases the core in a rear rest position. When the coil 64 of the electromagnet is supplied with current, it moves the core 62 so that it drives the actuating rod 61 forward, while compressing the return spring 65 against the inner wall 63 of the housing. When the coil 64 of the electromagnet is no longer supplied with current, the core 62 is no longer stressed by the coil 64 and the return spring 65 brings the core 62 and the rod 61 to the position back of rest.

L'autre extrémité de la tige d'actionnement 61 est solidaire d'un embout 66, par exemple de forme générale parallélépipédique, comportant une lumière oblongue 67, s'étendant dans une direction sensiblement perpendiculaire à la direction d'actionnement de la tige 61 et à l'axe de rotation Y du cache 50. En variante, on peut prévoir que la lumière oblongue 67 soit formée dans la tige d'actionnement 61, cette dernière étant par exemple aplatie et percée d'une ouverture oblongue, ou par une configuration particulière de la tige 61, celle-ci étant par exemple repliée plusieurs fois sur elle-même à la manière d'un trombone. Comme on le voit mieux sur les Figures 3 et 4, la lumière oblongue 67 est destinée à recevoir une extrémité de l'arbre 54. Cette extrémité est repliée deux fois de suite à angle droit de manière à former un vilebrequin à deux paliers, le palier du vilebrequin en dehors de l'axe de rotation Y du cache étant reçu dans la lumière oblongue 67 de l'embout 66 et étant susceptible de coulisser librement dans cette lumière oblongue.The other end of the actuating rod 61 is secured to a tip 66, by example of a generally parallelepiped shape, comprising an oblong lumen 67, extending in a direction substantially perpendicular to the direction of actuation of the rod 61 and to the axis of rotation Y of the cover 50. As a variant, it can be provided that the light oblong 67 is formed in the actuating rod 61, the latter being for example flattened and pierced with an oblong opening, or by a particular configuration of the rod 61, the latter being for example folded several times on itself in the manner of a paper clip. As best seen in Figures 3 and 4, the oblong light 67 is intended to receive one end of the shaft 54. This end is folded twice in succession at right angles so to form a two-bearing crankshaft, the crankshaft bearing outside the axis of rotation Y of the cover being received in the oblong opening 67 of the endpiece 66 and being susceptible to slide freely in this oblong light.

On comprend donc bien que lorsque l'électroaimant 60 est alimenté en courant, le mouvement exercé sur la tige 61 amène celle-ci, par l'intermédiaire du coulissement du palier du vilebrequin dans la lumière oblongue 67 du manchon 66, à provoquer la rotation de l'arbre 54 et le basculement du cache 50 de sa position verticale à sa position horizontale, et le maintien du cache 50 dans cette dernière position. Quand l'électroaimant n'est plus alimenté en courant, le ressort de rappel 65 ramène la tige d'actionnement 61 dans sa position arrière de repos, le cache 50 basculant alors dans le sens inverse pour revenir dans sa position verticale initiale. Le ressort de rappel 65 maintient alors le cache 50 dans cette position verticale.It is therefore clear that when the electromagnet 60 is supplied with current, the movement exerted on the rod 61 brings the latter, by means of the sliding of the bearing of the crankshaft in the oblong opening 67 of the sleeve 66, to cause the rotation of the shaft 54 and the tilting of the cover 50 from its vertical position to its horizontal position, and maintaining of the cover 50 in this last position. When the electromagnet is no longer supplied with current, the return spring 65 returns the actuating rod 61 to its rear position of rest, the cover 50 then tilting in the opposite direction to return to its vertical position initial. The return spring 65 then maintains the cover 50 in this vertical position.

Le cache 50 comporte deux pattes latérales 55 qui viennent prendre appui, lorsque le cache 50 revient dans sa position verticale, contre des butées 33 formées sur des ergots du réflecteur 20 et traversant des ouvertures 34 formées dans la pièce de support 30 à proximité des bords de l'ouverture centrale 35 de la pièce de support 30. Les butées 33 définissent ainsi avec précision par rapport au réflecteur 20, sous l'effet de la sollicitation du ressort de rappel 65, la position verticale du cache 50, de telle manière que le bord 51 soit situé au foyer du réflecteur 20 et dans le plan focal de la lentille convergente 70.The cover 50 has two lateral tabs 55 which come to bear when the cover 50 returns to its vertical position, against stops 33 formed on lugs of the reflector 20 and passing through openings 34 formed in the nearby support piece 30 edges of the central opening 35 of the support piece 30. The stops 33 thus define precisely with respect to the reflector 20, under the effect of the bias of the return spring 65, the vertical position of the cover 50, so that the edge 51 is located at the focus of the reflector 20 and in the focal plane of the converging lens 70.

La pièce intermédiaire 40 comporte également des portées 41 sur lesquelles viennent en appui les pattes latérales 55 du cache 50, et qui servent de butées limitant le mouvement de basculement vers l'avant du cache 50.The intermediate piece 40 also has bearing surfaces 41 on which come in support the side tabs 55 of the cover 50, and which serve as stops limiting the movement of tilting the cover 50 forward.

De la sorte, les butées 33 et 41 limitant le mouvement du cache vers l'avant et vers l'arrière étant formées sur des pièces massives, à savoir le réflecteur 20 et la pièce intermédiaire 40, il en résulte que la venue en butée du cache mobile 30 sur ces pièces massives n'engendrera que des bruits de faible intensité. De plus, on peut prévoir de former des pattes élastiques dans la pièce de support 30 pour empêcher cette dernière de vibrer.In this way, the stops 33 and 41 limiting the movement of the cover forwards and towards the rear being formed on solid parts, namely the reflector 20 and the intermediate part 40, it follows that the coming into abutment of the movable cover 30 on these massive parts will only generate low intensity noises. In addition, provision can be made to form legs elastic in the support piece 30 to prevent the latter from vibrating.

De manière avantageuse, la lame constituant le cache 50 est prolongée en dessous de l'axe de rotation Y, et elle est solidaire d'un contrepoids 52. On peut prévoir que le contrepoids 52 soit monté sur la lame ou soit formé d'une seule pièce avec cette lame. Le contrepoids 52 a pour effet que, dans la position verticale du cache 50, le centre de gravité de la lame soit situé en dessous de son axe de rotation Y, et que le cache 50 a ainsi tendance naturellement à se placer dans cette position verticale. Advantageously, the blade constituting the cover 50 is extended below the axis of rotation Y, and it is integral with a counterweight 52. It can be provided that the counterweight 52 is mounted on the blade or is formed in one piece with this blade. The counterweight 52 has the effect that, in the vertical position of the cover 50, the center of gravity of the blade is located below its axis of rotation Y, and the cover 50 thus tends naturally to be placed in this vertical position.

De préférence, la lame constituant le cache 50 est plane, et l'axe de rotation Y du cache 50 est contenu dans le plan de la lame, ou il en est très proche. De cette manière, lors du mouvement du cache 50, le bord 51 passe d'une position extrême, par exemple verticale, à une autre position extrême, par exemple horizontale, de manière continûment variable. On évite ainsi ce qu'il est convenu d'appeler dans la technique un phénomène de « rebond », qui apparaít lorsque le bord du cache du cache est situé en arrière du plan vertical passant par l'axe de rotation du cache. Dans une telle configuration, lors du basculement du cache vers l'avant, le bord du cache suit d'abord un arc de cercle ascendant, puis un arc de cercle descendant. Il en résulte alors, dans le faisceau émis par le projecteur, un mouvement indésirable de la limite d'éclairement définie par le bord du cache en coopération avec la lentille convergente. La disposition particulière selon la présente invention de l'axe de rotation du cache 50 permet d'éviter un tel inconvénient. On peut également prévoir que l'axe de rotation du cache 50 soit disposé en arrière du plan vertical passant par le bord 51 du cache 50.Preferably, the blade constituting the cover 50 is planar, and the axis of rotation Y of the cover 50 is contained in the plane of the blade, or it is very close to it. In this way, when movement of the cover 50, the edge 51 passes from an extreme position, for example vertical, to another extreme position, for example horizontal, continuously variable. We This avoids what is known in the art as a "rebound" phenomenon, which appears when the edge of the cache cover is located behind the vertical plane passing through the axis of rotation of the cover. In such a configuration, when switching the cache to at the front, the edge of the cover first follows an ascending arc, then a descending arc. This then results in an undesirable movement in the beam emitted by the projector. the illumination limit defined by the edge of the cover in cooperation with the converging lens. The particular arrangement according to the present invention of the axis of rotation of the cover 50 avoids such a disadvantage. We can also provide that the axis of rotation of the cover 50 is disposed behind the vertical plane passing through the edge 51 of the cover 50.

Bien entendu, la présente invention n'est pas limitée au mode de réalisation qui a été décrit, mais elle est susceptible au contraire de recevoir par l'homme du métier de nombreuses variantes qui rentrent dans son cadre. C'est ainsi par exemple que l'on pourra prévoir que l'électroaimant soit fixé sur la pièce intermédiaire et tire sur le cache pour le faire basculer, au lieu de le pousser comme on l'a décrit plus haut. C'est ainsi également que l'on pourra prévoir que la tige d'actionnement constitue une crémaillère, engrenant avec un pignon denté solidaire de l'arbre d'entraínement du cache.Of course, the present invention is not limited to the embodiment which has been described, but it is on the contrary likely to receive by the skilled person many variants that fall within its scope. Thus, for example, we can predict that the electromagnet is fixed on the intermediate piece and pulls on the cover to tilt it, instead of pushing it as described above. This is also how we can plan that the actuating rod constitutes a rack, meshing with a toothed pinion integral of the cache drive shaft.

Claims (6)

Projecteur pour véhicule automobile, comprenant une source lumineuse (11), un réflecteur (20) du genre elliptique, dont un premier foyer est situé au voisinage de la source lumineuse (11), une lentille convergente (70) dont un plan focal passe au voisinage du second foyer du réflecteur (20), un cache (50) étant prévu entre le réflecteur (20) et la lentille convergente (70) et comportant un bord d'occultation (51) définissant un profil de coupure prédéterminé pour le faisceau lumineux émis par le projecteur (20) selon un axe optique (X), le cache (50) étant mobile sélectivement entre deux positions extrêmes sous l'effet de moyens de basculement (60), une première position dans laquelle le bord d'occultation (51) du cache (50) est positionné sur le trajet des rayons lumineux pour former un faisceau lumineux ayant le profil de coupure prédéterminé, et une deuxième position dans laquelle le bord d'occultation (51) du cache (50) est positionné en dehors du trajet des rayons lumineux pour former un deuxième faisceau lumineux sans coupure, le cache (50) étant mobile autour d'un axe de rotation (Y) sensiblement horizontal et perpendiculaire à l'axe optique (X) du projecteur, les moyens de basculement (60) comportant une tige d'actionnement (61) mobile en translation dans une direction sensiblement parallèle à l'axe optique (X) du projecteur, la translation de la tige d'actionnement (61) commandant directement la rotation d'un arbre (54), l'arbre (54) étant solidaire du cache (50) et disposé selon l'axe de rotation (Y) du cache (50), caractérisé en ce qu'une première extrémité de la tige d'actionnement (61) est solidaire du noyau (62) d'un électroaimant (60) mobile en translation dans un boítier (63) comprenant une bobine (64), le noyau (62) étant sollicité par un ressort de compression (65) en appui contre une paroi interne (63) du boítier, et en ce qu'une deuxième extrémité de la tige d'actionnement (61) comporte une lumière oblongue (67) s'étendant dans une direction sensiblement perpendiculaire à la direction d'actionnement de la tige (61) et à l'axe de rotation (Y) du cache (50).Projector for a motor vehicle, comprising a light source (11), a reflector (20) of the elliptical type, a first focus of which is located in the vicinity of the light source (11), a converging lens (70) whose focal plane passes through the in the vicinity of the second focal point of the reflector (20), a cover (50) being provided between the reflector (20) and the converging lens (70) and comprising an obscuring edge (51) defining a predetermined cutting profile for the light beam emitted by the projector (20) along an optical axis (X), the cover (50) being selectively movable between two extreme positions under the effect of tilting means (60), a first position in which the occulting edge ( 51) of the cover (50) is positioned on the path of the light rays to form a light beam having the predetermined cutting profile, and a second position in which the obscuring edge (51) of the cover (50) is positioned outside of the path of r have light to form a second light beam without interruption, the cover (50) being movable about an axis of rotation (Y) substantially horizontal and perpendicular to the optical axis (X) of the projector, the tilting means (60) comprising an actuating rod (61) movable in translation in a direction substantially parallel to the optical axis (X) of the headlight, the translation of the actuating rod (61) directly controlling the rotation of a shaft (54) , the shaft (54) being secured to the cover (50) and arranged along the axis of rotation (Y) of the cover (50), characterized in that a first end of the actuating rod (61) is secured of the core (62) of an electromagnet (60) movable in translation in a housing (63) comprising a coil (64), the core (62) being biased by a compression spring (65) bearing against an internal wall ( 63) of the housing, and in that a second end of the actuating rod (61) has an oblique lumen ung (67) extending in a direction substantially perpendicular to the direction of actuation of the rod (61) and to the axis of rotation (Y) of the cover (50). Projecteur selon la revendication 1, caractérisé en ce que la lumière oblongue (67) est formée dans un embout (66) solidaire de la tige d'actionnement (61).Projector according to claim 1, characterized in that the oblong opening (67) is formed in an end piece (66) integral with the actuating rod (61). Projecteur selon la revendication 1, caractérisé en ce qu'une extrémité de l'arbre (54) est repliée deux fois de suite à angle droit de manière à former un vilebrequin à deux paliers, un palier du vilebrequin en dehors de l'axe de rotation (Y) du cache (50) étant reçu dans la lumière oblongue (67). Projector according to claim 1, characterized in that one end of the shaft (54) is folded twice in succession at right angles so as to form a crankshaft with two bearings, a bearing of the crankshaft outside the axis of rotation (Y) of the cover (50) being received in the oblong lumen (67). Projecteur selon la revendication 1, caractérisé en ce que le cache (50) est formé dans une lame comportant, sur son côté opposé à celui sur lequel est formé le bord d'occultation (51) par rapport à l'axe de rotation (Y), un contrepoids (52).Projector according to claim 1, characterized in that the cover (50) is formed in a strip comprising, on its side opposite to that on which the concealment edge (51) is formed relative to the axis of rotation (Y ), a counterweight (52). Projecteur selon la revendication 4, caractérisé en ce que la lame constituant le cache (50) est plane, et en ce que l'axe de rotation (Y) du cache (50) est contenu dans le plan de la lame.Projector according to claim 4, characterized in that the blade constituting the cover (50) is planar, and in that the axis of rotation (Y) of the cover (50) is contained in the plane of the blade. Projecteur selon la revendication 4, caractérisé en ce que la lame constituant le cache (50) est plane, et en ce que l'axe de rotation (Y) du cache (50) est disposé en arrière du plan vertical passant par le bord d'occultation (51) du cache (50).Projector according to claim 4, characterized in that the blade constituting the cover (50) is planar, and in that the axis of rotation (Y) of the cover (50) is disposed behind the vertical plane passing through the edge d 'concealment (51) of the cover (50).
EP01400639A 2000-03-31 2001-03-12 Motor vehicle headlamp emitting light beams having different beam patterns Expired - Lifetime EP1139017B1 (en)

Applications Claiming Priority (2)

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FR0004097A FR2807143B1 (en) 2000-03-31 2000-03-31 PROJECTOR FOR MOTOR VEHICLE EMITTING BEAMS OF DIFFERENT PROFILES
FR0004097 2000-03-31

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DE (1) DE60125627T2 (en)
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FR2836713A1 (en) * 2002-03-04 2003-09-05 Koito Mfg Co Ltd VEHICLE LIGHT WITH MOBILE SHUTTER
EP1621810A1 (en) * 2004-07-30 2006-02-01 Valeo Vision Elliptic optical module with shield for vehicles
EP1640658A2 (en) * 2004-09-22 2006-03-29 Automotive Lighting Reutlingen GmbH Headlight with several dimmer screens
CN106989338A (en) * 2016-01-20 2017-07-28 Aml***公司 The disabling mechanism with removable cut-off thick stick for motor vehicle headlamp

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JPH0935504A (en) * 1995-07-17 1997-02-07 Honda Motor Co Ltd Headlight device for vehicle
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FR2782147A1 (en) * 1998-08-10 2000-02-11 Valeo Vision Elliptical headlamp with compact operation of tilting internal mask, for use in motor vehicles

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JPH0935504A (en) * 1995-07-17 1997-02-07 Honda Motor Co Ltd Headlight device for vehicle
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FR2782147A1 (en) * 1998-08-10 2000-02-11 Valeo Vision Elliptical headlamp with compact operation of tilting internal mask, for use in motor vehicles

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2836713A1 (en) * 2002-03-04 2003-09-05 Koito Mfg Co Ltd VEHICLE LIGHT WITH MOBILE SHUTTER
DE10309181B4 (en) * 2002-03-04 2009-07-23 Koito Manufacturing Co., Ltd. vehicle headlights
EP1621810A1 (en) * 2004-07-30 2006-02-01 Valeo Vision Elliptic optical module with shield for vehicles
FR2873788A1 (en) * 2004-07-30 2006-02-03 Valeo Vision Sa ELLIPTICAL OPTICAL MODULE WITH OCCULTOR FOR MOTOR VEHICLE
US7534019B2 (en) 2004-07-30 2009-05-19 Valeo Vision Elliptical optical module with light shield for a motor vehicle
EP1640658A2 (en) * 2004-09-22 2006-03-29 Automotive Lighting Reutlingen GmbH Headlight with several dimmer screens
EP1640658A3 (en) * 2004-09-22 2007-06-20 Automotive Lighting Reutlingen GmbH Headlight with several dimmer screens
CN106989338A (en) * 2016-01-20 2017-07-28 Aml***公司 The disabling mechanism with removable cut-off thick stick for motor vehicle headlamp
CN106989338B (en) * 2016-01-20 2022-01-11 Aml***公司 Cut-off mechanism with removable cut-off bar for motor vehicle headlamp

Also Published As

Publication number Publication date
EP1139017B1 (en) 2007-01-03
FR2807143B1 (en) 2002-05-17
FR2807143A1 (en) 2001-10-05
DE60125627D1 (en) 2007-02-15
DE60125627T2 (en) 2007-10-04
ES2279795T3 (en) 2007-09-01

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