EP2947379A2 - Elliptical optical module for a motor vehicle lighting device - Google Patents

Elliptical optical module for a motor vehicle lighting device Download PDF

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Publication number
EP2947379A2
EP2947379A2 EP15167270.6A EP15167270A EP2947379A2 EP 2947379 A2 EP2947379 A2 EP 2947379A2 EP 15167270 A EP15167270 A EP 15167270A EP 2947379 A2 EP2947379 A2 EP 2947379A2
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EP
European Patent Office
Prior art keywords
cover
optical module
axis
parts
focus
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.)
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Application number
EP15167270.6A
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German (de)
French (fr)
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EP2947379A3 (en
Inventor
Carlos Gomez
Jose-Manuel Herrera
Eric Moisy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Iluminacion SA
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Valeo Iluminacion SA
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Publication date
Application filed by Valeo Iluminacion SA filed Critical Valeo Iluminacion SA
Publication of EP2947379A2 publication Critical patent/EP2947379A2/en
Publication of EP2947379A3 publication Critical patent/EP2947379A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/698—Shaft-shaped screens rotating along its longitudinal axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/62—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution for adaptation between right-hand and left-hand traffic

Definitions

  • the present invention relates to an optical module for automotive lighting device projector type, the module being placed within a motor vehicle. It applies more particularly to optical modules called elliptical modules comprising a light source associated with a reflector and closed by a dioptric element of the convergent lens type, for example a plano-convex type lens.
  • An optical module comprises an optical system comprising at least one light source, for example a halogen lamp or a xenon lamp, arranged in a reflector, and which is preferably autonomous, that is to say which is able to be lit. or turned off separately from other optical modules lighting device in which it is installed if the latter comprises a plurality of optical modules.
  • a light source for example a halogen lamp or a xenon lamp
  • the present invention relates to optical modules of the first family.
  • the invention is also concerned with optical modules equipped with a fixed or movable cover adapted to intercept at least partially, depending on its position, the light beam emitted by the light source / reflector assembly.
  • the shape of the upper edge of the cache makes it possible to define the desired cut in the beam by imaging with the convergent lens.
  • the mobile cover on command and thanks to the presence of a motor, can take different positions relative to the light source, including at least one so-called optically active position, that is to say a position where it actually obscures a part of the light beam, in particular for the module to emit a cut-off beam, such as a cross beam (oblique cut) or anti-fog (horizontal cut).
  • the cache may thus have one or more active positions, for example two, one for the traffic crossing function on the right and one for the traffic function on the left, and also a so-called passive function where it does not block the light beam, thus allowing the module to emit light beams without interruption of the road beam type.
  • the invention proposes such an elliptical optical module with several optically active parts and which is easy to produce mechanically.
  • one of the parts of the cache comprises an axis, called the main axis, on which are rotated the other parts of the cache. The mechanical realization of the cache is thus facilitated.
  • the different parts of the cover can be arranged so that the junction or junctions between the cut edges of the different parts is offset (s) transversely to the longitudinal optical axis.
  • the part of the cover, including its cutting edge, comprising the axis on which are rotatably mounted the other parts of the cover advantageously extends beyond the longitudinal optical axis.
  • Each part of the cover may include a gear for controlling its rotation.
  • the cache can only include two parts.
  • Each of the parts of the cover mounted in rotation on the main axis may have a tubular portion in which is inserted the main axis.
  • the part of the cover comprising the main axis can be formed integrally in one piece with this main axis.
  • the other parts of the cover may have a tubular portion in which is inserted the main axis.
  • the cover can be arranged in a support fixed between the reflector and the lens.
  • Said main axis may be perpendicular to the longitudinal optical axis.
  • the invention also relates to a lighting and / or signaling device comprising an optical module described above.
  • the optical module 1 comprises a reflector 2 whose inner active optical surface 21 has a shape overall ellipsoidal and which has a front opening.
  • the optical axis "A" of the reflector 2 has a longitudinal orientation.
  • the reflector 2 comprises a first rear focus "a” and a second front focus “b” which are arranged on the optical axis "A".
  • a light source is arranged in the vicinity of the first focus "a", inside the reflector 2.
  • This is a discharge lamp which is mounted in the reflector 2 via a mounting hole provided at the rear vertex of the reflector 2.
  • the invention could be applied to devices comprising light-emitting diodes, for example to the device of the document FR2953468 , replacing the cache of the latter by that of the present invention.
  • the optical module 1 also comprises an intermediate sleeve, not shown, which is generally frustoconical in shape converging towards the front and which is coaxial with the optical axis "A".
  • the rear end of the sleeve has a rear opening whose contour corresponds to the contour of the front opening of the reflector 2.
  • the sleeve is intended to be fixed on the periphery of the front opening of the reflector.
  • the front end of the sleeve is closed by a convergent optical lens 3 before.
  • the lens 3 is arranged so that its focal plane coincides with the second front focus "b" of the reflector 2.
  • the lamp when it is on, it emits light rays, represented by arrows, a majority of which is reflected by the inner wall of the reflector 2 towards the front.
  • the lamp being arranged at the first focus "a", the reflected light rays converge towards the second focus "b" which is arranged behind the lens 3.
  • the light rays then pass through the lens 34 so as to form a light beam which is directed forward in the overall direction of the optical axis "A".
  • Module 1 also includes a cover 4, illustrated in FIGS. Figures 2 to 5 and 7.
  • the cover 4 is pivotally mounted about an axis of rotation "B" transversely oriented relative to the reflector 2.
  • the rotation axis "B" of the cover 4 n is not concurrent with the optical axis "A" of the reflector 2.
  • the axis of rotation "B" is more particularly arranged in the transverse vertical plane of the front opening of the reflector 2, near the second front focus "b".
  • the cover 4 comprises several distinct parts 5.6, each part 5, 6 being pivotally mounted about the axis of rotation "B". Each portion 5.6 is provided with adjacent flanges 7 ( Figures 2, 3 and 5 ). Each flange 7 extends radially from the axis of rotation "B". The transverse width of the flanges 7 is substantially equal to the transverse diameter of the opening of the reflector 2 at the height of the second focus "b".
  • the wings 7 meet at an angle at the axis of rotation "B" of the cover 4.
  • Each wing 7 comprises at least one opaque active portion which is intended to prevent a portion of the light rays to pass through when the wing 7 is interposed vertically between the lamp and the second home "b".
  • the free edge 5 'and 6' of these wings form a cutting edge portion, intended, in one of the positions of the cache portion which carries it, to form the cut line without the beam.
  • the cache may comprise a first optically active portion 5, called primary cut-off cache.
  • the primary cutout cover 5 is driven by a gear 8 allowing its rotation.
  • the primary cut-off cover 5 comprises an axis 9, called the main axis of the cover, intended to accommodate one or more other optically active parts, for example a secondary cut-off cover 6 ( figure 5 ).
  • the secondary cut-off cover 6 comprises for this purpose a tube 10 in which is inserted the axis 9 of the primary cut-off cover 5.
  • the secondary cutout cover 6 has a free rotation and independent of that of the primary cutoff cover 5, thanks to a gear 11 for controlling its rotation.
  • the secondary cut-off cover 6 comprises, like the primary cut-off cover 5, a plurality of optically active wings 7 capable of forming a cut-off in the beam emitted by the optical module 1.
  • Each cut of the secondary cover 6 makes it possible to form with a cut of the primary cache 5 the cut that will be projected by the elliptical system.
  • the junction between the primary cut-off cover 5 and the secondary cut-off cover 6, that is to say the junction between the flanges 7 of the primary cut-off cover 5 and the fins 7 of the secondary cut-off cover 6, is preferably offset from the optical axis "A". This gives a greater precision on the cut at the optical axis "A", and it avoids projecting light leaks on the road, so as not to dazzle drivers of vehicles traveling in the opposite direction.
  • the primary cut-off cover 5 Even more preferentially, it is the primary cut-off cover 5, and in particular its cutting edge, which extends beyond the longitudinal optical axis "A", which allows greater precision.
  • the dimension chain and the games are indeed less important on the primary cut-off cover 5, which carries the other parts.
  • the figure 6 thus illustrates different types of cuts obtained by combining different wing profiles 7 of the primary cut-off cover 5 and the secondary cut-off cover 6.
  • the primary cut-off cover 5 may for example have six wings 7 of type 1 to type 6 and the secondary cut-off cover 6 may have four wings 7 of type A to type D.
  • the number and shape of cutting cuts are chosen according to the form of cuts required, especially according to country regulations.

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

Abstract

Module optique (1) pour dispositif d'éclairage et/ou de signalisation pour véhicule automobile, apte à émettre au moins un type de faisceau lumineux selon un axe optique longitudinal (A), et comportant :
- un réflecteur (2) comportant un premier foyer (a) et un deuxième foyer (b) sur l'axe optique (A),
- une source lumineuse, au voisinage du premier foyer (a),
- une lentille convergente (3) à l'avant du réflecteur (2), et
- un cache (4), au voisinage du deuxième foyer (b) et monté en rotation autour d'un axe (B) orthogonal à l'axe optique (A), et présentant au moins deux parties (5,6) munies chacune d'au moins un bord apte à former une coupure dans le faisceau lumineux, l'un des bords de coupure étant apte à être positionné au niveau du deuxième foyer (b),
l'une (5) des parties (5, 6) du cache (4) comprenant un axe (9), sur lequel sont montées en rotation les autres parties (6) du cache (4).

Figure imgaf001
Optical module (1) for a lighting and / or signaling device for a motor vehicle, capable of emitting at least one type of light beam along a longitudinal optical axis (A), and comprising:
a reflector (2) comprising a first focus (a) and a second focus (b) on the optical axis (A),
a light source, in the vicinity of the first focus (a),
a convergent lens (3) at the front of the reflector (2), and
- a cover (4), in the vicinity of the second focus (b) and mounted in rotation about an axis (B) orthogonal to the optical axis (A), and having at least two parts (5,6) each provided with at least one edge capable of forming a cut-off in the light beam, one of the cut-off edges being able to be positioned at the level of the second focus (b),
one (5) of the parts (5, 6) of the cover (4) comprising an axis (9) on which the other parts (6) of the cover (4) are rotated.
Figure imgaf001

Description

La présente invention a pour objet un module optique pour dispositif d'éclairage automobile du type projecteur, le module étant placé au sein d'un véhicule automobile. Elle s'applique plus particulièrement aux modules optiques appelés modules elliptiques comprenant une source de lumière associée à un réflecteur et fermés par un élément dioptrique du type lentille convergente, par exemple une lentille de type plan-convexe.The present invention relates to an optical module for automotive lighting device projector type, the module being placed within a motor vehicle. It applies more particularly to optical modules called elliptical modules comprising a light source associated with a reflector and closed by a dioptric element of the convergent lens type, for example a plano-convex type lens.

Le domaine de l'invention est, d'une façon générale, celui dispositifs destinés à l'éclairage de la route ou à la signalisation, parmi lesquels on trouve essentiellement:

  • des feux de position, d'intensité et de portée faible,
  • des feux de route longue portée, et des feux de complément de type longue portée, dont la zone de vision sur la route avoisine 200 mètres, et qui doivent être éteints lorsque l'on croise un autre véhicule afin de ne pas éblouir son conducteur; ce sont des faisceaux sans coupure,
  • des feux antibrouillard,
  • des feux de croisement, ou codes, d'intensité importante et de portée sur la route avoisinant 70 mètres,
  • des projecteurs perfectionnés, dits bifonctions, qui cumulent les fonctions de feux de croisement et de feu de route en incorporant un cache amovible,
  • des dispositifs de signalisation, par exemple de type clignotants.
The field of the invention is, in general, that devices intended for road lighting or signaling, among which we find essentially:
  • position, intensity and low range lights,
  • long-range headlamps, and long-range supplement lights, whose vision zone on the road is approximately 200 meters, and which must be extinguished when crossing another vehicle so as not to dazzle its driver; they are unbroken beams,
  • fog lights,
  • low beam, or codes, of significant intensity and range on the road close to 70 meters,
  • advanced projectors, called dual functions, which combine the functions of low beam and high beam by incorporating a removable cover,
  • signaling devices, for example flashing type.

Il existe deux familles principales de modules optiques, qui correspondent à deux agencements distincts de différents éléments, et qui sont susceptibles d'intervenir dans le dispositif selon l'invention. On comprend par module optique un système optique comprenant au moins une source lumineuse, par exemple une lampe halogène ou une lampe xénon, disposée dans un réflecteur, et qui est de préférence autonome, c'est-à-dire qui est apte à être allumé ou éteint séparément des autres modules optiques du dispositif d'éclairage dans lequel il est installé si ce dernier comporte plusieurs modules optiques.There are two main families of optical modules, which correspond to two different arrangements of different elements, and which may be involved in the device according to the invention. An optical module comprises an optical system comprising at least one light source, for example a halogen lamp or a xenon lamp, arranged in a reflector, and which is preferably autonomous, that is to say which is able to be lit. or turned off separately from other optical modules lighting device in which it is installed if the latter comprises a plurality of optical modules.

Les deux familles principales de modules optiques sont les suivantes:

  • La première famille est celle des modules optiques dits elliptiques. Dans ce type de projecteurs, une tache de concentration lumineuse est engendrée par une source lumineuse disposée dans un miroir, ou réflecteur. Ces modules sont dit elliptiques car ils présentent deux foyers, les rayons partant de l'un des foyers et étant réfléchis par le réflecteur convergeant vers le deuxième foyer. Par exemple, le réflecteur peut être une portion d'ellipsoïde. Par exemple, la source lumineuse est disposée au premier foyer, ou foyer objet, d'un miroir en forme d'ellipsoïde, ladite tache se formant au second foyer, ou foyer image, du miroir. La tache de concentration lumineuse est ensuite projetée sur la route par une lentille convergente, par exemple une lentille de type plan-convexe.
  • La seconde famille est celle des modules optiques dits paraboliques. Dans ce type de modules optiques, un faisceau lumineux est engendré par une source lumineuse de petite dimension disposée dans un réflecteur, ou miroir. La projection sur la route des rayons lumineux réfléchis par un réflecteur approprié permet d'obtenir directement un faisceau lumineux obéissant aux différentes contraintes imposées par les normes. Cette famille de modules optiques inclut les projecteurs dits à surface libre, ou surface complexe, qui permettent d'obtenir directement un faisceau lumineux présentant une ligne de coupure désirée.
The two main families of optical modules are:
  • The first family is that of so-called elliptical optical modules. In this type of projectors, a spot of light concentration is generated by a light source arranged in a mirror, or reflector. These modules are said to be elliptical because they have two foci, the rays starting from one of the foci and being reflected by the reflector converging towards the second focus. For example, the reflector may be an ellipsoid portion. For example, the light source is disposed at the first focus, or object focus, of an ellipsoid-shaped mirror, said spot forming at the second focus, or image focus, of the mirror. The spot of light concentration is then projected onto the road by a convergent lens, for example a plano-convex lens.
  • The second family is that of so-called parabolic optical modules. In this type of optical modules, a light beam is generated by a small light source disposed in a reflector, or mirror. The projection on the road of the light rays reflected by a suitable reflector makes it possible to directly obtain a light beam obeying the various constraints imposed by the standards. This family of optical modules includes projectors said free surface, or complex surface, which can directly obtain a light beam having a desired cutoff line.

La présente invention concerne les modules optiques de la première famille.The present invention relates to optical modules of the first family.

L'invention s'intéresse en outre aux modules optiques équipés d'un cache fixe ou mobile apte à intercepter au moins partiellement, selon sa position, le faisceau lumineux émis par l'ensemble source lumineuse/réflecteur. La forme du bord supérieur du cache permet de délimiter la coupure voulue dans le faisceau par imagerie avec la lentille convergente. Le cache mobile, sur commande et grâce à la présence d'un moteur, peut prendre différentes positions par rapport à la source lumineuse, dont au moins une position dite active optiquement, c'est-à-dire une position où il occulte effectivement une partie du faisceau lumineux, notamment pour que le module émette un faisceau à coupure, comme un faisceau de type croisement (coupure oblique) ou anti-brouillard (coupure horizontale). Le cache peut ainsi présenter une ou plusieurs positions actives, par exemple deux, une pour la fonction croisement trafic à droite et une pour la fonction trafic à gauche, et aussi une fonction dite passive où il n'occulte pas le faisceau lumineux, permettant ainsi au module d'émettre des faisceaux lumineux sans coupure du type faisceau de route.The invention is also concerned with optical modules equipped with a fixed or movable cover adapted to intercept at least partially, depending on its position, the light beam emitted by the light source / reflector assembly. The shape of the upper edge of the cache makes it possible to define the desired cut in the beam by imaging with the convergent lens. The mobile cover, on command and thanks to the presence of a motor, can take different positions relative to the light source, including at least one so-called optically active position, that is to say a position where it actually obscures a part of the light beam, in particular for the module to emit a cut-off beam, such as a cross beam (oblique cut) or anti-fog (horizontal cut). The cache may thus have one or more active positions, for example two, one for the traffic crossing function on the right and one for the traffic function on the left, and also a so-called passive function where it does not block the light beam, thus allowing the module to emit light beams without interruption of the road beam type.

Il est connu, par exemple du document DE 10 2006 043 281 , d'utiliser un cache présentant différentes parties optiquement actives pouvant tourner les unes par rapport aux autres par rotation par rapport à un axe.It is known, for example from the document DE 10 2006 043 281 , to use a cache having different optically active portions rotatable relative to each other by rotation relative to an axis.

L'invention propose un tel module optique elliptique à plusieurs parties optiquement actives et qui est facile à réaliser mécaniquement.The invention proposes such an elliptical optical module with several optically active parts and which is easy to produce mechanically.

L'invention a ainsi pour objet un module optique elliptique pour dispositif d'éclairage et/ou de signalisation pour véhicule automobile, apte à émettre au moins un type de faisceau lumineux vers l'avant selon la direction globale d'un axe optique longitudinal, et comportant :

  • un réflecteur de type elliptique, comportant un premier foyer et un deuxième foyer agencés sur l'axe optique,
  • une source lumineuse, agencée au voisinage du premier foyer,
  • une lentille convergente disposée à l'avant du réflecteur, et
  • un cache, agencé au voisinage du deuxième foyer et monté en rotation autour d'un axe de rotation orthogonal à l'axe optique, ledit cache présentant au moins deux parties optiquement actives munies chacune d'au moins un bord optiquement actif apte à former une coupure dans le faisceau émis par le module optique, l'un des bords de coupure étant apte à être positionné au niveau du deuxième foyer.
The invention thus relates to an elliptical optical module for a lighting and / or signaling device for a motor vehicle, capable of emitting at least one type of light beam forwardly in the overall direction of a longitudinal optical axis, and comprising:
  • an elliptical type reflector, comprising a first focus and a second focus arranged on the optical axis,
  • a light source, arranged in the vicinity of the first focus,
  • a convergent lens disposed at the front of the reflector, and
  • a cover, arranged in the vicinity of the second focus and rotatably mounted about an axis of rotation orthogonal to the optical axis, said cover having at least two optically active portions each provided with at least one optically active edge capable of forming a cut in the beam emitted by the optical module, one of the cut edges being adapted to be positioned at the second focus.

Dans le module optique selon l'invention, l'une des parties du cache comprend un axe, appelé axe principal, sur lequel sont montées en rotation les autres parties du cache. La réalisation mécanique du cache est ainsi facilitée.In the optical module according to the invention, one of the parts of the cache comprises an axis, called the main axis, on which are rotated the other parts of the cache. The mechanical realization of the cache is thus facilitated.

Les différentes parties du cache peuvent être agencées de manière à ce que la ou les jonctions entre les bords de coupure des différentes parties soit décalée(s) transversalement par rapport l'axe optique longitudinal.The different parts of the cover can be arranged so that the junction or junctions between the cut edges of the different parts is offset (s) transversely to the longitudinal optical axis.

Dans ce cas, la partie du cache, y compris son bord de coupure, comprenant l'axe sur lequel sont montées en rotation les autres parties du cache se prolonge avantageusement au-delà de l'axe optique longitudinal.In this case, the part of the cover, including its cutting edge, comprising the axis on which are rotatably mounted the other parts of the cover advantageously extends beyond the longitudinal optical axis.

Chaque partie du cache peut comprendre un engrenage permettant le pilotage de sa rotation.Each part of the cover may include a gear for controlling its rotation.

La cache peut comprendre uniquement deux parties.The cache can only include two parts.

Chacune des parties du cache montées en rotation sur l'axe principal peut présenter une portion tubulaire dans laquelle est inséré l'axe principal.Each of the parts of the cover mounted in rotation on the main axis may have a tubular portion in which is inserted the main axis.

La partie du cache comprenant l'axe principal peut être formée venue de matière en une seule pièce avec cet axe principal. Les autres parties du cache peuvent présenter une portion tubulaire dans laquelle est inséré l'axe principal.The part of the cover comprising the main axis can be formed integrally in one piece with this main axis. The other parts of the cover may have a tubular portion in which is inserted the main axis.

Le cache peut être disposé dans un support fixé entre le réflecteur et la lentille.The cover can be arranged in a support fixed between the reflector and the lens.

Ledit axe principal peut être perpendiculaire à l'axe optique longitudinal.Said main axis may be perpendicular to the longitudinal optical axis.

L'invention a également pour objet un dispositif d'éclairage et/ou de signalisation comprenant un module optique décrit ci-dessus.The invention also relates to a lighting and / or signaling device comprising an optical module described above.

D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description suivante donnée à titre d'exemple illustratif et non limitatif et faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue schématique en coupe longitudinale d'une partie d'un module optique selon l'invention,
  • les figures 2 à 5 illustrent différentes parties d'un cache du module optique, et
  • la figure 6 est un diagramme montrant différents exemples de coupures obtenues à l'aide du module optique.
Other characteristics and advantages of the present invention will appear more clearly on reading the following description given by way of illustrative and nonlimiting example and with reference to the appended drawings in which:
  • the figure 1 is a schematic view in longitudinal section of a portion of an optical module according to the invention,
  • the Figures 2 to 5 illustrate different parts of a cache of the optical module, and
  • the figure 6 is a diagram showing different examples of cuts obtained using the optical module.

Tel qu'illustré à la figure 1, le module optique 1 comprend un réflecteur 2 dont la surface optique active interne 21 a une forme globalement ellipsoïdale et qui comporte une ouverture avant. L'axe optique "A" du réflecteur 2 a une orientation longitudinale. Le réflecteur 2 comporte un premier foyer arrière "a" et un deuxième foyer avant "b" qui sont agencés sur l'axe optique "A".As illustrated in figure 1 , the optical module 1 comprises a reflector 2 whose inner active optical surface 21 has a shape overall ellipsoidal and which has a front opening. The optical axis "A" of the reflector 2 has a longitudinal orientation. The reflector 2 comprises a first rear focus "a" and a second front focus "b" which are arranged on the optical axis "A".

Une source lumineuse est agencée au voisinage du premier foyer "a", à l'intérieur du réflecteur 2. Il s'agit ici d'une lampe à décharge qui est montée dans le réflecteur 2 par l'intermédiaire d'un orifice de montage prévu au sommet arrière du réflecteur 2. L'invention pourrait toutefois s'appliquer à des dispositifs comportant des diodes électroluminescentes, comme par exemple au dispositif du document FR2953468 , en remplaçant le cache de ce dernier par celui de la présente invention.A light source is arranged in the vicinity of the first focus "a", inside the reflector 2. This is a discharge lamp which is mounted in the reflector 2 via a mounting hole provided at the rear vertex of the reflector 2. However, the invention could be applied to devices comprising light-emitting diodes, for example to the device of the document FR2953468 , replacing the cache of the latter by that of the present invention.

Le module optique 1 comporte aussi un manchon intermédiaire, non représenté, qui est de forme globalement tronconique convergeant vers l'avant et qui est coaxial à l'axe optique "A". L'extrémité arrière du manchon comporte une ouverture arrière dont le contour correspond au contour de l'ouverture avant du réflecteur 2. Le manchon est destiné à être fixé sur le pourtour de l'ouverture avant du réflecteur.The optical module 1 also comprises an intermediate sleeve, not shown, which is generally frustoconical in shape converging towards the front and which is coaxial with the optical axis "A". The rear end of the sleeve has a rear opening whose contour corresponds to the contour of the front opening of the reflector 2. The sleeve is intended to be fixed on the periphery of the front opening of the reflector.

L'extrémité avant du manchon est fermée par une lentille optique avant 3 convergente. La lentille 3 est agencée de manière que son plan focal coïncide avec le deuxième foyer avant "b" du réflecteur 2.The front end of the sleeve is closed by a convergent optical lens 3 before. The lens 3 is arranged so that its focal plane coincides with the second front focus "b" of the reflector 2.

Ainsi, comme représenté à la figure 1, lorsque la lampe est allumée, elle émet des rayons lumineux, représentés par des flèches, dont une majeure partie est réfléchie par la paroi interne du réflecteur 2 vers l'avant. La lampe étant agencée au premier foyer "a", les rayons lumineux réfléchis convergent vers le deuxième foyer "b" qui est agencé en arrière de la lentille 3. Les rayons lumineux traversent ensuite la lentille 34 de manière à former un faisceau lumineux qui est dirigé vers l'avant selon la direction globale de l'axe optique "A".Thus, as represented in figure 1 when the lamp is on, it emits light rays, represented by arrows, a majority of which is reflected by the inner wall of the reflector 2 towards the front. The lamp being arranged at the first focus "a", the reflected light rays converge towards the second focus "b" which is arranged behind the lens 3. The light rays then pass through the lens 34 so as to form a light beam which is directed forward in the overall direction of the optical axis "A".

Le module 1 comporte également un cache 4, illustré aux figures 2 à 5 et 7. De manière connue, le cache 4 est monté pivotant autour d'un axe de rotation "B" d'orientation transversale par rapport au réflecteur 2. De manière non limitative, l'axe de rotation "B" du cache 4 n'est pas concourant avec l'axe optique "A" du réflecteur 2.Module 1 also includes a cover 4, illustrated in FIGS. Figures 2 to 5 and 7. In known manner, the cover 4 is pivotally mounted about an axis of rotation "B" transversely oriented relative to the reflector 2. Without limitation, the rotation axis "B" of the cover 4 n is not concurrent with the optical axis "A" of the reflector 2.

L'axe de rotation "B" est plus particulièrement agencé dans le plan vertical transversal de l'ouverture avant du réflecteur 2, à proximité du deuxième foyer avant "b".The axis of rotation "B" is more particularly arranged in the transverse vertical plane of the front opening of the reflector 2, near the second front focus "b".

Le cache 4 comprend plusieurs parties 5,6 distinctes, chaque partie 5,6 étant montée pivotante autour de l'axe de rotation "B". Chaque partie 5,6 est munie d'ailes 7 adjacentes (figures 2, 3 et 5). Chaque aile 7 s'étend radialement depuis l'axe de rotation "B". La largeur transversale des ailes 7 est sensiblement égale au diamètre transversal de l'ouverture du réflecteur 2 à la hauteur du deuxième foyer "b".The cover 4 comprises several distinct parts 5.6, each part 5, 6 being pivotally mounted about the axis of rotation "B". Each portion 5.6 is provided with adjacent flanges 7 ( Figures 2, 3 and 5 ). Each flange 7 extends radially from the axis of rotation "B". The transverse width of the flanges 7 is substantially equal to the transverse diameter of the opening of the reflector 2 at the height of the second focus "b".

Les ailes 7 se rejoignent en formant un angle au niveau de l'axe de rotation "B" du cache 4.The wings 7 meet at an angle at the axis of rotation "B" of the cover 4.

Chaque aile 7 comporte au moins une partie active opaque qui est destinée à empêcher une partie des rayons lumineux de la traverser lorsque l'aile 7 est interposée verticalement entre la lampe et le deuxième foyer "b". La tranche libre 5' et 6' de ces ailes forme une portion de bord de coupure, destinée, dans l'une des positions de la partie de cache qui la porte, à former la ligne de coupure sans le faisceau.Each wing 7 comprises at least one opaque active portion which is intended to prevent a portion of the light rays to pass through when the wing 7 is interposed vertically between the lamp and the second home "b". The free edge 5 'and 6' of these wings form a cutting edge portion, intended, in one of the positions of the cache portion which carries it, to form the cut line without the beam.

Tel qu'illustré à la figure 2, le cache peut comprendre une première partie optiquement active 5, appelée cache de coupure primaire. Le cache de coupure primaire 5 est entraîné par un engrenage 8 permettant sa rotation. Conformément à l'invention, le cache de coupure primaire 5 comprend un axe 9, appelé axe principal du cache, destiné à accueillir une ou plusieurs autres parties optiquement actives, par exemple un cache de coupure secondaire 6 (figure 5). Le cache de coupure secondaire 6 comprend à cet effet un tube 10 dans lequel est inséré l'axe 9 du cache de coupure primaire 5.As illustrated in figure 2 , the cache may comprise a first optically active portion 5, called primary cut-off cache. The primary cutout cover 5 is driven by a gear 8 allowing its rotation. According to the invention, the primary cut-off cover 5 comprises an axis 9, called the main axis of the cover, intended to accommodate one or more other optically active parts, for example a secondary cut-off cover 6 ( figure 5 ). The secondary cut-off cover 6 comprises for this purpose a tube 10 in which is inserted the axis 9 of the primary cut-off cover 5.

Le cache de coupure secondaire 6 a une rotation libre et indépendante de celle du cache de coupure primaire 5, grâce à un engrenage 11 permettant le pilotage de sa rotation. Le cache de coupure secondaire 6 comporte, tout comme le cache de coupure primaire 5, une pluralité d'ailes 7 optiquement actives aptes à former une coupure dans le faisceau émis par le module optique 1. Chaque coupure du cache secondaire 6 permet de former avec une coupure du cache primaire 5 la coupure qui sera projetée par le système elliptique.The secondary cutout cover 6 has a free rotation and independent of that of the primary cutoff cover 5, thanks to a gear 11 for controlling its rotation. The secondary cut-off cover 6 comprises, like the primary cut-off cover 5, a plurality of optically active wings 7 capable of forming a cut-off in the beam emitted by the optical module 1. Each cut of the secondary cover 6 makes it possible to form with a cut of the primary cache 5 the cut that will be projected by the elliptical system.

Tel qu'illustré aux figures 4 et 6, la jonction entre le cache de coupure primaire 5 et le cache de coupure secondaire 6, c'est-à-dire la jonction entre les ailes 7 du cache de coupure primaire 5 et les ailettes 7 du cache de coupure secondaire 6, est de préférence décalée par rapport à l'axe optique "A". On obtient ainsi une plus grande précision sur la coupure au niveau de l'axe optique "A", et on évite de projeter des fuites de lumière sur la route, pour ne pas éblouir les conducteurs de véhicules circulant en sens inverse.As illustrated in Figures 4 and 6 , the junction between the primary cut-off cover 5 and the secondary cut-off cover 6, that is to say the junction between the flanges 7 of the primary cut-off cover 5 and the fins 7 of the secondary cut-off cover 6, is preferably offset from the optical axis "A". This gives a greater precision on the cut at the optical axis "A", and it avoids projecting light leaks on the road, so as not to dazzle drivers of vehicles traveling in the opposite direction.

Encore plus préférentiellement, c'est le cache de coupure primaire 5, et en particulier son bord de coupure, qui se prolonge au-delà de l'axe optique longitudinal "A", ce qui permet une plus grande précision. La chaîne de cote et les jeux sont en effet moins importants sur le cache de coupure primaire 5, qui porte les autres parties.Even more preferentially, it is the primary cut-off cover 5, and in particular its cutting edge, which extends beyond the longitudinal optical axis "A", which allows greater precision. The dimension chain and the games are indeed less important on the primary cut-off cover 5, which carries the other parts.

La figure 6 illustre ainsi différents types de coupures obtenues en combinant différents profils d'ailes 7 du cache de coupure primaire 5 et du cache de coupure secondaire 6. Le cache de coupure primaire 5 peut par exemple présenter six ailes 7 de type 1 à type 6 et le cache de coupure secondaire 6 peut présenter quatre ailes 7 de type A à type D. Le nombre et la forme de découpe des coupures sont choisis en fonction de la forme des coupures requises, notamment selon les règlements des pays.The figure 6 thus illustrates different types of cuts obtained by combining different wing profiles 7 of the primary cut-off cover 5 and the secondary cut-off cover 6. The primary cut-off cover 5 may for example have six wings 7 of type 1 to type 6 and the secondary cut-off cover 6 may have four wings 7 of type A to type D. The number and shape of cutting cuts are chosen according to the form of cuts required, especially according to country regulations.

Claims (11)

Module optique (1) elliptique pour dispositif d'éclairage et/ou de signalisation pour véhicule automobile, apte à émettre au moins un type de faisceau lumineux vers l'avant selon la direction globale d'un axe optique longitudinal (A), et comportant : - un réflecteur (2) de type elliptique, comportant un premier foyer (a) et un deuxième foyer (b) agencés sur l'axe optique (A), - une source lumineuse, agencée au voisinage du premier foyer (a), - une lentille convergente (3) disposée à l'avant du réflecteur (2), et - un cache (4), agencé au voisinage du deuxième foyer (b) et monté en rotation autour d'un axe de rotation (B) orthogonal à l'axe optique (A), ledit cache (4) présentant au moins deux parties optiquement actives (5,6) munies chacune d'au moins un bord optiquement actif apte à former une coupure dans le faisceau émis par le module optique (1), l'un des bords de coupure étant apte à être positionné au niveau du deuxième foyer (b), ledit module optique (1) étant caractérisé en ce que l'une (5) des parties (5,6) du cache (4) comprend un axe (9), appelé axe principal, sur lequel sont montées en rotation les autres parties (6) du cache (4).Elliptical optical module (1) for a lighting and / or signaling device for a motor vehicle, capable of emitting at least one type of light beam forward in the overall direction of a longitudinal optical axis (A), and comprising : a reflector (2) of elliptical type, comprising a first focus (a) and a second focus (b) arranged on the optical axis (A), a light source, arranged in the vicinity of the first focus (a), a convergent lens (3) disposed at the front of the reflector (2), and a cover (4), arranged in the vicinity of the second focus (b) and rotatably mounted about an axis of rotation (B) orthogonal to the optical axis (A), said cover (4) having at least two parts optically active elements (5, 6) each provided with at least one optically active edge capable of forming a cut-off in the beam emitted by the optical module (1), one of the cut-off edges being able to be positioned at the level of the second home (b), said optical module (1) being characterized in that one (5) of the parts (5, 6) of the cover (4) comprises an axis (9), called the main axis, on which the other parts are rotated ( 6) of the cover (4). Module optique (1) selon la revendication 1, caractérisé en ce que les différentes parties (5,6) du cache sont agencées de manière à ce que la ou les jonctions entre les bords de coupure des différentes parties (5,6) soit décalée(s) transversalement par rapport l'axe optique longitudinal (A).Optical module (1) according to claim 1, characterized in that the different parts (5, 6) of the cover are arranged in such a way that the junction (s) between the cut edges of the different parts (5, 6) is offset. (s) transversely to the longitudinal optical axis (A). Module optique (1) selon la revendication 2, caractérisé en ce que la partie (5) du cache (4), y compris son bord de coupure, comprenant l'axe (9) sur lequel sont montées en rotation les autres parties (6) du cache (4) se prolonge au-delà de l'axe optique longitudinal (A).Optical module (1) according to claim 2, characterized in that the part (5) of the cover (4), including its cutting edge, comprising the axis (9) on which are rotatably mounted the other parts (6). ) of the cover (4) extends beyond the longitudinal optical axis (A). Module optique (1) selon l'une des revendications 1à 3, caractérisé en ce que chaque partie (5,6) du cache (4) comprend un engrenage (8,11) permettant le pilotage de sa rotation.Optical module (1) according to one of claims 1 to 3, characterized in that each portion (5,6) of the cover (4) comprises a gear (8,11) for controlling its rotation. Module optique (1) selon l'une des revendications 1à 4, caractérisé en ce que le cache (4) comprend uniquement deux parties (5,6).Optical module (1) according to one of claims 1 to 4, characterized in that the cover (4) comprises only two parts (5,6). Module optique (1) selon l'une des revendications 1 à 5, caractérisé en ce que chacune des parties (5,6) du cache (4) montées en rotation sur l'axe principal (9) présente une portion tubulaire (10) dans laquelle est inséré l'axe principal (9).Optical module (1) according to one of claims 1 to 5, characterized in that each of the parts (5, 6) of the cover (4) rotatably mounted on the main axis (9) has a tubular portion (10) in which is inserted the main axis (9). Module optique (1) selon l'une des revendications 1 à 5, caractérisé en ce que la partie (5) du cache (4) comprenant ledit axe principal (9) est formée venue de matière en une seule pièce avec cet axe principal (9).Optical module (1) according to one of claims 1 to 5, characterized in that the portion (5) of the cover (4) comprising said main axis (9) is integrally formed in one piece with this main axis ( 9). Module optique (1) selon la revendication 7, dans lequel les autres parties du cache présentent une portion tubulaire (10) dans laquelle est inséré l'axe principal (9).Optical module (1) according to claim 7, wherein the other parts of the cover have a tubular portion (10) in which is inserted the main axis (9). Module optique (1) selon l'une des revendications 1 à 8, caractérisé en ce que le cache (4) est disposé dans un support fixé entre le réflecteur (2) et la lentille (3).Optical module (1) according to one of claims 1 to 8, characterized in that the cover (4) is disposed in a support fixed between the reflector (2) and the lens (3). Module optique (1) selon l'une des revendications 1 à 9, caractérisé en ce que ledit axe principal (9) est perpendiculaire à l'axe optique longitudinal (A).Optical module (1) according to one of claims 1 to 9, characterized in that said main axis (9) is perpendicular to the longitudinal optical axis (A). Dispositif d'éclairage et/ou de signalisation, caractérisé en ce qu'il comprend un module optique (1) selon l'une des revendications 1 à 10.Lighting and / or signaling device, characterized in that it comprises an optical module (1) according to one of Claims 1 to 10.
EP15167270.6A 2014-05-20 2015-05-12 Elliptical optical module for a motor vehicle lighting device Withdrawn EP2947379A3 (en)

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FR1454541A FR3021392B1 (en) 2014-05-20 2014-05-20 ELLIPTICAL OPTICAL MODULE FOR AUTOMOBILE SCALE DEVICE

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EP2947379A3 EP2947379A3 (en) 2016-04-27

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Citations (2)

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FR2953468A1 (en) 2009-12-08 2011-06-10 Valeo Vision OPTICAL MODULE FOR GENERATING A CODE-TYPE LIGHT BEAM AND A SELECTIVE LUMINOUS BEAM

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US5373424A (en) * 1992-10-21 1994-12-13 Koito Manufacturing Co., Ltd. Automotive projection headlamp
JP5053890B2 (en) * 2008-03-05 2012-10-24 株式会社小糸製作所 Vehicle lamp
JP2010146984A (en) * 2008-12-22 2010-07-01 Koito Mfg Co Ltd Headlight device for vehicle
WO2011033709A1 (en) * 2009-09-15 2011-03-24 株式会社小糸製作所 Headlight device for vehicle
JP2011175857A (en) * 2010-02-24 2011-09-08 Koito Mfg Co Ltd Headlight for vehicle

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Publication number Priority date Publication date Assignee Title
DE102006043281A1 (en) 2006-09-14 2008-03-27 Hella Kgaa Hueck & Co. Projection headlight device for vehicle, has two focal points comprising shell type reflector, light source and lens with diaphragm shaft, which is arranged between the lens and the reflector
FR2953468A1 (en) 2009-12-08 2011-06-10 Valeo Vision OPTICAL MODULE FOR GENERATING A CODE-TYPE LIGHT BEAM AND A SELECTIVE LUMINOUS BEAM

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FR3021392B1 (en) 2018-11-02
FR3021392A1 (en) 2015-11-27

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