EP1409922B1 - Motor vehicle headlight with improved electromagnetic shielding means - Google Patents

Motor vehicle headlight with improved electromagnetic shielding means Download PDF

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Publication number
EP1409922B1
EP1409922B1 EP01983640A EP01983640A EP1409922B1 EP 1409922 B1 EP1409922 B1 EP 1409922B1 EP 01983640 A EP01983640 A EP 01983640A EP 01983640 A EP01983640 A EP 01983640A EP 1409922 B1 EP1409922 B1 EP 1409922B1
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EP
European Patent Office
Prior art keywords
reflector
lamp holder
conductive element
motor vehicle
metal ring
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Expired - Lifetime
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EP01983640A
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German (de)
French (fr)
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EP1409922A1 (en
Inventor
Rémy c/o Valeo Vision CHAVE
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Valeo Vision SAS
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Valeo Vision SAS
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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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices

Definitions

  • the present invention relates generally to motor vehicle headlamps equipped with a discharge lamp.
  • Discharge lamps in particular of the metal halide type (typically sodium iodide), are more and more frequently used as light sources in such projectors.
  • metal halide type typically sodium iodide
  • a motor vehicle headlamp comprising a reflector on which is fixed a lamp holder for mounting a discharge lamp and a high voltage connector adapted to be attached to the lamp mounted in the lamp holder, to ensure the power supply of this lamp.
  • the reflector has an electrically conductive shielding layer.
  • the lamp holder has a metal part fixed to the reflector so as to be in electrical contact with said layer.
  • the connector has a metal shielding shell.
  • the lamp holder or the connector has at least one elastically deformable conductive tongue capable of ensuring electrical continuity between the lamp holder and the connector during assembly of said connector.
  • the present invention aims to overcome the limitations of the state of the art, to ensure electrical continuity, within a projector, between the reflector and the lamp holder and thus allow good electromagnetic compatibility between these elements.
  • a searchlight for a motor vehicle comprising an at least partially conducting reflector, a lamp holder for supporting a lamp through an orifice of the reflector, this lamp holder having a metal ring connected to the mass of the motor vehicle, and a conductive element electrically connecting the reflector and the metal ring, characterized in that the conductive element extends electrically continuously 360 degrees around the orifice to provide electromagnetic shielding between the reflector and the lamp holder .
  • the shielding more effectively limits the leakage of electromagnetic waves and better meets the requirements of the specifications in terms of shielding.
  • the invention relates to an electromagnetic shielding element for a motor vehicle, characterized in that it consists of a conductive element extending over 360 degrees about an axis and between an end intended to be electrically connected to a lamp holder and another end to be electrically connected to a conductive area at least partially filling at least one of the surfaces of a reflector.
  • a motor vehicle headlight is shown. Conventionally it comprises a housing closed at the front by an ice and defining an interior space, but these elements have not been shown in the drawings for the sake of simplification.
  • a reflector 2 In the interior of the housing is housed a reflector 2 in the region of the bottom of which is mounted a lamp holder 4.
  • the lamp holder 4 has means for fixing and positioning adjustment 6 of the lamp holder 4 in the housing.
  • the lamp holder 4 also has a metal ring 8 connected to the mass of the motor vehicle.
  • the metal ring 8 is pierced with three slots 10 each for receiving a pin 12 of a fixing washer 14.
  • this fixing washer 14 consists of a metal washer whose edge corresponding to the inner diameter is provided with pins 12 extending radially towards the center of the washer.
  • the pins 12 consist of a tongue which has, in section in a plane perpendicular to that of the washer and parallel to a radial direction, a V-shaped.
  • the tabs constituting the pins 12 are flexible and resilient. The bottom of the V of each tongue penetrates into a light 10 ( Fig. 1 ). Folded thus, the tabs do not present sharp edges. Therefore, unlike self-locking washers type "circlip" often used in mechanics, the fixing washer 14 can be attached to the metal ring 8 without damaging the anti-corrosion coating thereof.
  • the reflector 2 is made by injecting thermosetting material (projector of the parabolic type or anotropic reflecting surface of at least a part of the photometry of the beam).
  • the reflector 2 has on its rear face an electrically conductive layer 16 made for example by overmolding the thermosetting material of the reflector 2 on or around a thin metal insert or by physical or chemical deposition an electrically conductive coating.
  • This electrically conductive coating is for example made of aluminum.
  • a conductive element 18 of shielding electrically connects the conductive layer 16 to the metal ring 8 ( Fig.1 ).
  • this conductive element 18 consists of a cylindrical metal knit 19 stretched between an internal washer 20 integral with the fixing washer 14 (see also figure 4 ) intended to be mounted on the metal ring 8 of the lamp holder 4 and a collar 24 intended to be mounted on the reflector 2.
  • Fixing washer 14 provides electrical continuity between conductive element 18 and metal ring 8.
  • the collar 24 provides electrical continuity between the conductive element 18 and the conductive layer 16.
  • the metallic knit 19 is flexible and thus enables the electrical conduction between the reflector 2 and the lamp holder 4 to be continuously adapted without interruption to any existing gaps between these parts and / or when there is a relative displacement of these parts. (for a crossing of low beam, high beam for example).
  • the figure 5 illustrates some of them.
  • the figure 5a represents a conductive element 18 of shielding in the form of a spiral spring.
  • the turns 26 of the spring must be quasi-contiguous so as to allow only a few electromagnetic waves to pass and thus allow a wraparound shield while allowing a possible relative movement of the reflector 2 and the lamp holder 4.
  • the section of the turns 26 can be any.
  • the figure 5b represents a shielding conductive element 18 consisting of conductive cylindrical parts 28 nested one inside the other.
  • the figure 5c represents a shielding conductive element 18 consisting of a grid 30 or a conductive fabric (woven or not).
  • a reflector 2 made of thermosetting material has been described above, but the reflector 2 can be made of stamped sheet metal, in a conventional manner per se.
  • the conductive element 18 is electrically connected to the metal ring 8 of a lamp holder 4 . But in a completely equivalent manner, the conductive element 18 may be electrically connected to a connector itself connected to the lamp or to another room capable of forming a shielding enveloping the projector.

Abstract

The invention concerns a motor vehicle headlight comprising a reflector (2) at least partially conductive, a lamp holder (4) to support a lamp through an orifice of the reflector (2), said lamp holder (4) having a metal ring (8) connected to the motor vehicle ground connection, and a conductive element (18) electrically connecting the reflector (2) and the metal ring (8). The invention is characterised in that the conductive element (18) extends electrically continuously over 360° around the orifice to provide electromagnetic shielding between the reflector (2) and the lamp holder (4).

Description

La présente invention a trait d'une façon générale aux projecteurs de véhicules automobiles équipés d'une lampe à décharge.The present invention relates generally to motor vehicle headlamps equipped with a discharge lamp.

Les lampes à décharge notamment du type à halogène métallique (typiquement iodure de sodium) sont de plus en plus fréquemment utilisées comme sources lumineuses dans de tels projecteurs.Discharge lamps, in particular of the metal halide type (typically sodium iodide), are more and more frequently used as light sources in such projectors.

Elles jouissent en effet de l'avantage appréciable de pouvoir, à puissance consommée comparable, fournir une intensité lumineuse bien plus importante que dans le cas des lampes à filament à halogène classiques.They enjoy in fact the appreciable advantage of being able, at comparable power consumption, to provide a much higher luminous intensity than in the case of conventional halogen filament lamps.

Ces lampes présentent toutefois l'inconvénient d'engendrer, au niveau de leur arc, des champs électromagnétiques qui posent un grave problème vis à vis des exigences de compatibilité électromagnétique, tant en émission qu'en réception, généralement imposées par les cahiers des charges. On observera à cet égard que, par le développement des circuits électroniques assurant certaines fonctions de sécurité à bord d'un véhicule, ces exigences sont aujourd'hui de plus en plus sévères.However, these lamps have the disadvantage of generating, in their arcs, electromagnetic fields that pose a serious problem with respect to the requirements of electromagnetic compatibility, both in transmission and reception, generally imposed by the specifications. It will be observed in this regard that, by the development of electronic circuits providing certain safety functions on board a vehicle, these requirements are today more and more severe.

Il existe déjà des dispositions destinées à blinder autant que possible une lampe à décharge et ces circuits d'alimentation. Ainsi le document FR 2 783 593 décrit un projecteur de véhicule automobile, comprenant un réflecteur sur lequel est fixé un porte-lampe pour le montage d'une lampe à décharge et un connecteur haute tension apte à être rapporté sur la lampe montée dans le porte-lampe, pour assurer l'alimentation électrique de cette lampe. Le réflecteur possède une couche électriquement conductrice de blindage. Le porte-lampe possède une partie métallique fixée sur le réflecteur de façon à être en contact électrique avec ladite couche. Le connecteur possède une enveloppe métallique de blindage. Le porte-lampe ou le connecteur possède au moins une languette conductrice élastiquement déformable apte à assurer la continuité électrique entre le porte lampe et le connecteur lors du montage dudit connecteur.There are already provisions for shielding as much as possible a discharge lamp and these power circuits. So the document FR 2 783 593 describes a motor vehicle headlamp, comprising a reflector on which is fixed a lamp holder for mounting a discharge lamp and a high voltage connector adapted to be attached to the lamp mounted in the lamp holder, to ensure the power supply of this lamp. The reflector has an electrically conductive shielding layer. The lamp holder has a metal part fixed to the reflector so as to be in electrical contact with said layer. The connector has a metal shielding shell. The lamp holder or the connector has at least one elastically deformable conductive tongue capable of ensuring electrical continuity between the lamp holder and the connector during assembly of said connector.

Cependant, ce type de blindage électromagnétique, dit « à griffes », ne permet pas toujours d'atteindre les exigences en terme de blindage mentionnées plus haut.However, this type of electromagnetic shielding, called "claw", does not always achieve the requirements in terms of shielding mentioned above.

La présente invention vise à palier les limitations de l'état de la technique, à assurer la continuité électrique, au sein d'un projecteur, entre le réflecteur et le porte-lampe et à permettre ainsi une bonne compatibilité électromagnétique entre ces éléments.The present invention aims to overcome the limitations of the state of the art, to ensure electrical continuity, within a projector, between the reflector and the lamp holder and thus allow good electromagnetic compatibility between these elements.

Ce but est atteint grâce à un projecteur pour véhicule automobile comprenant un réflecteur au moins partiellement conducteur, un porte-lampe pour supporter une lampe à travers un orifice du réflecteur, ce porte-lampe ayant une bague métallique reliée à la masse du véhicule automobile, et un élément conducteur reliant électriquement le réflecteur et la bague métallique, caractérisé par le fait que l'élément conducteur s'étend de manière électriquement continue sur 360 degrés autour de l'orifice pour assurer un blindage électromagnétique entre le réflecteur et le porte-lampe.This object is achieved by means of a searchlight for a motor vehicle comprising an at least partially conducting reflector, a lamp holder for supporting a lamp through an orifice of the reflector, this lamp holder having a metal ring connected to the mass of the motor vehicle, and a conductive element electrically connecting the reflector and the metal ring, characterized in that the conductive element extends electrically continuously 360 degrees around the orifice to provide electromagnetic shielding between the reflector and the lamp holder .

En effet, grâce à l'invention, on réalise une conduction sur 360° autour des pièces du réflecteur et du porte-lampe, à monter ensemble. Ainsi, le blindage limite plus efficacement les fuites des ondes électromagnétiques et répond mieux aux exigences des cahiers des charges en terme de blindage.In fact, thanks to the invention, a 360 ° conduction is carried out around the reflector and the lamp holder parts, to be mounted together. Thus, the shielding more effectively limits the leakage of electromagnetic waves and better meets the requirements of the specifications in terms of shielding.

Des aspects préférés mais non limitatifs des projecteurs selon l'invention sont les suivants :

  • l'élément conducteur est fixé au porte-lampe grâce à une rondelle de fixation, coopérant avec une structure du porte-lampe sans altérer le revêtement anti-corrosion de ce dernier, par exemple, la rondelle de fixation possède des languettes aptes à pénétrer dans une ouverture du porte-lampe ;
  • l'élément conducteur est fixé au réflecteur grâce à un collier ;
  • l'élément conducteur est apte à permettre un rattrapage du jeu éventuel entre le réflecteur et le porte-lampe ou un déplacement relatif entre le réflecteur et le porte-lampe ;
  • l'élément conducteur est constitué d'un matériau métallique tissé ;
  • l'élément conducteur a une forme en spirale ; et
  • l'élément conducteur est constitué d'éléments cylindriques emboîtés les uns dans les autres.
Preferred but non-limiting aspects of the projectors according to the invention are the following:
  • the conductive element is fixed to the lamp holder by means of a fixing washer, cooperating with a structure of the lamp holder without altering the anti-corrosion coating of the latter, for example, the fixing washer has tabs adapted to penetrate into the lamp holder; an opening of the lamp holder;
  • the conductive element is attached to the reflector through a collar;
  • the conductive element is adapted to allow a catch of any play between the reflector and the lamp holder or a relative displacement between the reflector and the lamp holder;
  • the conductive element is made of woven metal material;
  • the conductive element has a spiral shape; and
  • the conductive element consists of cylindrical elements nested in each other.

Selon un autre aspect, l'invention concerne un élément de blindage électromagnétique pour véhicule automobile, caractérisé par le fait qu'il est constitué d'un élément conducteur s'étendant sur 360 degrés autour d'un axe et entre une extrémité destinée à être électriquement reliée à un porte-lampe et une autre extrémité destinée à être électriquement reliée à une zone conductrice garnissant au moins en partie au moins l'une des surfaces d'un réflecteur.According to another aspect, the invention relates to an electromagnetic shielding element for a motor vehicle, characterized in that it consists of a conductive element extending over 360 degrees about an axis and between an end intended to be electrically connected to a lamp holder and another end to be electrically connected to a conductive area at least partially filling at least one of the surfaces of a reflector.

D'autres aspects, buts et avantages de la présente invention apparaîtront mieux à la lecture de la description détaillée suivante de formes de réalisation préférées de celle-ci, données à titres exemples non limitatifs et qui font référence aux dessins annéxés sur lesquels :

  • la figure 1 est une vue schématique en coupe horizontale et axiale d'une partie d'un projecteur selon une première forme de réalisation de l'invention ;
  • la figure 2 est une vue de dessus d'un élément de blindage électromagnétique tel que celui équipant le projecteur de la figure 1 ;
  • la figure 3 est une vue schématique en coupe horizontale et axiale de l'élément de blindage représenté sur la figure 2 ;
  • la figure 4 est une vue de dessus schématique d'une rondelle de fixation d'un élément de blindage électromagnétique tel que celui représenté sur les figures 2 et 3, sur le projecteur représenté à la figure 1 ; et
  • la figure 5 représente schématiquement en perspective des variantes de l'élément de blindage représenté sur les figures 2 et 3.
Other aspects, objects and advantages of the present invention will become more apparent upon reading the following detailed description of preferred embodiments thereof, given by way of non-limitative examples and referring to the appended drawings in which:
  • the figure 1 is a schematic view in horizontal and axial section of a portion of a projector according to a first embodiment of the invention;
  • the figure 2 is a top view of an electromagnetic shielding element such as that fitted to the projector of the figure 1 ;
  • the figure 3 is a schematic view in horizontal and axial section of the shielding element shown in FIG. figure 2 ;
  • the figure 4 is a schematic top view of a washer for attaching an electromagnetic shielding element such as that shown in FIGS. figures 2 and 3 , on the projector represented at figure 1 ; and
  • the figure 5 schematically shows in perspective variants of the shielding element shown on the figures 2 and 3 .

En référence à la figure 1, on a représenté un projecteur de véhicule automobile. De façon classique celui-ci comprend un boîtier fermé à l'avant par une glace et définissant un espace intérieur, mais ces éléments n'ont pas été représentés sur les dessins par souci de simplification.With reference to the figure 1 a motor vehicle headlight is shown. Conventionally it comprises a housing closed at the front by an ice and defining an interior space, but these elements have not been shown in the drawings for the sake of simplification.

Dans l'espace intérieur du boîtier est logé un réflecteur 2 dans la région du fond duquel est monté un porte-lampe 4.In the interior of the housing is housed a reflector 2 in the region of the bottom of which is mounted a lamp holder 4.

Le porte-lampe 4 possède des moyens de fixation et réglage de positionnement 6 du porte-lampe 4 dans le boîtier. Le porte lampe 4 possède également une bague métallique 8 reliée à la masse du véhicule automobile.The lamp holder 4 has means for fixing and positioning adjustment 6 of the lamp holder 4 in the housing. The lamp holder 4 also has a metal ring 8 connected to the mass of the motor vehicle.

La bague métallique 8 est percée de trois lumières 10 destinées à recevoir chacune respectivement un picot 12 d'une rondelle de fixation 14.The metal ring 8 is pierced with three slots 10 each for receiving a pin 12 of a fixing washer 14.

Comme représenté sur la figure 2, cette rondelle de fixation 14 est constitué d'une rondelle métallique dont le bord correspondant au diamètre intérieur est muni de picots 12 s'étendant radialement vers le centre de la rondelle. Les picots 12 sont constitués d'une languette qui présente, en coupe dans un plan perpendiculaire à celui de la rondelle et parallèle à une direction radiale, une forme en V. Les languettes constitutives des picots 12 sont flexibles et élastiques. Le fond du V de chaque languette pénètre dans une lumière 10 (fig. 1). Repliées ainsi, les languettes ne présentent pas d'arêtes vives. Donc, contrairement aux rondelles autobloquantes de type « circlip » souvent utilisées en mécanique, la rondelle de fixation 14 peut être fixée à la bague métallique 8 sans endommager le revêtement anti-corrosion de celle-ci.As shown on the figure 2 this fixing washer 14 consists of a metal washer whose edge corresponding to the inner diameter is provided with pins 12 extending radially towards the center of the washer. The pins 12 consist of a tongue which has, in section in a plane perpendicular to that of the washer and parallel to a radial direction, a V-shaped. The tabs constituting the pins 12 are flexible and resilient. The bottom of the V of each tongue penetrates into a light 10 ( Fig. 1 ). Folded thus, the tabs do not present sharp edges. Therefore, unlike self-locking washers type "circlip" often used in mechanics, the fixing washer 14 can be attached to the metal ring 8 without damaging the anti-corrosion coating thereof.

Le réflecteur 2 est réalisé par injection de matière thermodurcissable (projecteur du type parabolique ou à surface réfléchissante anto-génératrice d'au moins une partie de la photométrie du faisceau). Pour assurer un blindage de la lampe à décharge, le réflecteur 2 possède sur sa face arrière une couche électriquement conductrice 16 réalisée par exemple par surmoulage du matériau thermodurcissable du réflecteur 2 sur ou autour d'un insert métallique mince ou encore par dépôt physique ou chimique d'un revêtement électriquement conducteur. Ce revêtement électriquement conducteur est par exemple constitué d'aluminium.The reflector 2 is made by injecting thermosetting material (projector of the parabolic type or anotropic reflecting surface of at least a part of the photometry of the beam). To ensure shielding of the discharge lamp, the reflector 2 has on its rear face an electrically conductive layer 16 made for example by overmolding the thermosetting material of the reflector 2 on or around a thin metal insert or by physical or chemical deposition an electrically conductive coating. This electrically conductive coating is for example made of aluminum.

Un élément conducteur 18 de blindage relie électriquement la couche conductrice 16 à la bague métallique 8 (Fig.1).A conductive element 18 of shielding electrically connects the conductive layer 16 to the metal ring 8 ( Fig.1 ).

Comme représenté sur la figure 3, cet élément conducteur 18 est constitué d'un tricot métallique 19 cylindrique tendu entre une rondelle interne 20 solidaire de la rondelle de fixation 14 (voir aussi figure 4) destinée a être montée sur la bague métallique 8 du porte-lampe 4 et un collier 24 destiné à être monté sur le réflecteur 2.As shown on the figure 3 , this conductive element 18 consists of a cylindrical metal knit 19 stretched between an internal washer 20 integral with the fixing washer 14 (see also figure 4 ) intended to be mounted on the metal ring 8 of the lamp holder 4 and a collar 24 intended to be mounted on the reflector 2.

La rondelle de fixation 14 assure la continuité électrique entre l'élément conducteur 18 et la bague métallique 8.Fixing washer 14 provides electrical continuity between conductive element 18 and metal ring 8.

Le collier 24 assure la continuité électrique entre l'élément conducteur 18 et la couche conductrice 16.The collar 24 provides electrical continuity between the conductive element 18 and the conductive layer 16.

Le tricot métallique 19 est souple et permet ainsi de s'adapter sans interruption de la conduction électrique entre le réflecteur 2 et le porte-lampe 4, aux éventuels jeux existants entre ces pièces et/ou lorsqu'il existe un déplacement relatif de ces pièces (pour un passage feux de croisement, feux de route par exemple).The metallic knit 19 is flexible and thus enables the electrical conduction between the reflector 2 and the lamp holder 4 to be continuously adapted without interruption to any existing gaps between these parts and / or when there is a relative displacement of these parts. (for a crossing of low beam, high beam for example).

La continuité électrique entre le réflecteur 2 et le porte-lampe 4 est ainsi parfaitement maintenue en toute circonstance et est ainsi complètement enveloppante comme l'exigent les contraintes liées aux classes de champ électromagnétique à atteindre désormais.The electrical continuity between the reflector 2 and the lamp holder 4 is thus perfectly maintained in all circumstances and is thus completely enveloping as required by the constraints related to classes of electromagnetic field to reach now.

De nombreuses variantes au mode de réalisation exposé ci-dessus peuvent être envisagées.Many variations to the embodiment set forth above can be envisaged.

La figure 5 en illustre quelques unes.The figure 5 illustrates some of them.

La figure 5a représente un élément conducteur 18 de blindage en forme de ressort à spirales. Les spires 26 du ressort doivent être quasi-jointives afin de ne laisser passer que peu d'ondes électromagnétiques et de permettre ainsi un blindage enveloppant tout en autorisant un éventuel déplacement relatif du réflecteur 2 et du porte-lampe 4. La section des spires 26 peut être quelconque.The figure 5a represents a conductive element 18 of shielding in the form of a spiral spring. The turns 26 of the spring must be quasi-contiguous so as to allow only a few electromagnetic waves to pass and thus allow a wraparound shield while allowing a possible relative movement of the reflector 2 and the lamp holder 4. The section of the turns 26 can be any.

La figure 5b représente un élément conducteur 18 de blindage constitué de pièces cylindrique 28 conductrices emboîtées les unes dans les autres.The figure 5b represents a shielding conductive element 18 consisting of conductive cylindrical parts 28 nested one inside the other.

La figure 5c représente un élément conducteur 18 de blindage constitué d'un grillage 30 ou d'un tissu conducteur (tissé ou non).The figure 5c represents a shielding conductive element 18 consisting of a grid 30 or a conductive fabric (woven or not).

On a décrit ci-dessus un réflecteur 2 en matière thermodurcissable mais le réflecteur 2 peut être réalisé en tôle emboutie, de façon classique en soi.A reflector 2 made of thermosetting material has been described above, but the reflector 2 can be made of stamped sheet metal, in a conventional manner per se.

De même on a décrit ci-dessus le cas où l'élément conducteur 18 est électriquement relié à la bague métallique 8 d'un porte-lampe 4. Mais de manière tout à fait équivalente, l'élément conducteur 18 peut être électriquement relié à un connecteur lui-même branché sur la lampe ou encore à une autre pièce apte à former un blindage enveloppant du projecteur.Similarly, the case in which the conductive element 18 is electrically connected to the metal ring 8 of a lamp holder 4 has been described above. But in a completely equivalent manner, the conductive element 18 may be electrically connected to a connector itself connected to the lamp or to another room capable of forming a shielding enveloping the projector.

Claims (10)

  1. Motor vehicle headlight comprising a reflector (2) at least partially conductive, a lamp holder (4) for supporting a lamp through an orifice of the reflector (2), the said lamp holder (4) having a metal ring (8) connected to the earth connection of the motor vehicle, and a conductive element (18) electrically connecting the reflector (2) and the metal ring (8), the conductive element (18) extending in an electrically continuous manner over 360 degrees around the orifice thereby providing electromagnetic shielding between the reflector (2) and the lamp holder (4), characterised in that the conductive element comprises a flexible cylindrical metallic woven material (19) stretched between an inner washer (20) integral with a fixing washer (14) designed to be mounted on the metal ring (8) of the lamp holder (4) and a collar (24) designed to be mounted on the reflector (2).
  2. Headlight according to claim 1, characterised in that the conductive element (18) is fixed to the lamp holder (4) by virtue of the fixing washer (14) cooperating with the structure of the lamp holder (4) without impairing the corrosion-proof coating of the latter.
  3. Headlight according to any one of the preceding claims, characterised in that the conductive element (18) is designed to allow the take-up of any play between the reflector (2) and the lamp holder (4) or a relative displacement between the reflector (2) and the lamp holder (4).
  4. Headlight according to any one of the preceding claims, characterised in that the conductive element (18) consists of a woven metallic material.
  5. Headlight according to any one of claims 1 to 3, characterised in that the conductive element (18) has a spiral shape.
  6. Headlight according to any one of claims 1 to 3, characterised in that the conductive element (18) consists of cylindrical elements fitted into each other.
  7. Electromagnetic shielding element for a motor vehicle headlight comprising a reflector (2) at least partially conductive, and a lamp holder (4) for supporting a lamp through an orifice of the reflector (2), the said lamp holder (4) having a metal ring (8) connected to the earth connection of the motor vehicle, the shielding element consisting of a conductive element (18) extending over 360 degrees about an axis, designed to extend in an electrically continuous manner around the orifice of the said reflector, characterised in that the conductive element comprises a flexible cylindrical metallic woven material (19) designed to be stretched between an inner washer (20) integral with a fixing washer (14) mounted on the metal ring (8) of the lamp holder (4) and a collar (24) designed to be mounted on the reflector (2).
  8. Shielding element according to claim 7, characterised in that the conductive element (18) consists of a woven metallic material.
  9. Shielding element according to claim 7, characterised in that the conductive element (18) has a spiral shape.
  10. Shielding element according to claim 7, characterised in that the conductive element (18) consists of cylindrical elements fitted into each other.
EP01983640A 2000-10-30 2001-10-26 Motor vehicle headlight with improved electromagnetic shielding means Expired - Lifetime EP1409922B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0013918A FR2816035B1 (en) 2000-10-30 2000-10-30 MOTOR VEHICLE PROJECTOR WITH IMPROVED ELECTROMAGNETIC SHIELDING MEANS
FR0013918 2000-10-30
PCT/FR2001/003349 WO2002037024A1 (en) 2000-10-30 2001-10-26 Motor vehicle headlight with improved electromagnetic shielding means

Publications (2)

Publication Number Publication Date
EP1409922A1 EP1409922A1 (en) 2004-04-21
EP1409922B1 true EP1409922B1 (en) 2012-08-01

Family

ID=8855897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01983640A Expired - Lifetime EP1409922B1 (en) 2000-10-30 2001-10-26 Motor vehicle headlight with improved electromagnetic shielding means

Country Status (4)

Country Link
EP (1) EP1409922B1 (en)
ES (1) ES2394281T3 (en)
FR (1) FR2816035B1 (en)
WO (1) WO2002037024A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10322627A1 (en) 2003-05-20 2004-12-09 Hella Kgaa Hueck & Co. Headlights for vehicles
EP2163814B1 (en) * 2008-09-16 2020-03-11 HELLA GmbH & Co. KGaA Reflector for a lighting device for a motor vehicle
DE102010048236A1 (en) * 2010-10-12 2012-04-12 Odelo Gmbh Motor vehicle light

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3195215B2 (en) * 1995-12-28 2001-08-06 株式会社小糸製作所 Automotive headlamp
JP3162290B2 (en) * 1996-04-30 2001-04-25 株式会社小糸製作所 Vehicle lamp having a discharge bulb
FR2755747B1 (en) * 1996-11-13 1999-01-29 Valeo Vision DISCHARGE LAMP PROJECTOR
FR2769072B1 (en) * 1997-09-26 1999-12-24 Valeo Vision MOTOR VEHICLE PROJECTOR EQUIPPED WITH A DISCHARGE LAMP AND IMPROVED ELECTROMAGNETIC SHIELDING MEANS
FR2783593B1 (en) 1998-09-21 2000-12-29 Valeo Vision MOTOR VEHICLE PROJECTOR EQUIPPED WITH A DISCHARGE LAMP AND IMPROVED ELECTROMAGNETIC SHIELDING MEANS

Also Published As

Publication number Publication date
ES2394281T3 (en) 2013-01-30
EP1409922A1 (en) 2004-04-21
FR2816035B1 (en) 2003-04-11
WO2002037024A1 (en) 2002-05-10
FR2816035A1 (en) 2002-05-03

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