EP0843125B1 - Headlamp comprising an arc discharge bulb - Google Patents

Headlamp comprising an arc discharge bulb Download PDF

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Publication number
EP0843125B1
EP0843125B1 EP97402709A EP97402709A EP0843125B1 EP 0843125 B1 EP0843125 B1 EP 0843125B1 EP 97402709 A EP97402709 A EP 97402709A EP 97402709 A EP97402709 A EP 97402709A EP 0843125 B1 EP0843125 B1 EP 0843125B1
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EP
European Patent Office
Prior art keywords
reflector
headlight according
ring
fixing
fixed
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.)
Expired - Lifetime
Application number
EP97402709A
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German (de)
French (fr)
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EP0843125A1 (en
Inventor
Vincent Raillard
Benoít Reiss
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Valeo Vision SAS
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Valeo Vision SAS
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Priority to EP98120777A priority Critical patent/EP0898113B1/en
Publication of EP0843125A1 publication Critical patent/EP0843125A1/en
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Publication of EP0843125B1 publication Critical patent/EP0843125B1/en
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Classifications

    • 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
    • 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
    • F21S41/172—High-intensity 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof

Definitions

  • the present invention relates to projectors of motor vehicles, and more particularly to discharge lamp type headlamps.
  • the document GB-A-2 249 165 represents for example the state of the art closest according to the preamble of claim 1.
  • Motor vehicle headlamps discharges are powered by alternating currents, from preferably square, which increases notably the lifetime of the lamps.
  • each chain link mesh which creates glare incompatible with regulatory requirements.
  • An object of the invention is therefore to propose a motor vehicle headlamp whose sources of noise is reduced, without performance projector optics are not attenuated.
  • a lamp projector with discharge for a motor vehicle comprising a reflector concave in the bottom of which is placed a lamp with discharge, characterized in that it comprises, inside of the reflector, a metal ring that surrounds the lamp discharge near its base and which is connected to the mass.
  • the projector illustrated in Figure 1 has mainly a reflector 1, a lamp 2 and a concealer 3.
  • the reflector 1 conventionally has a concave shape which reflects the light emitted by the lamp 2 so as to what it leaves the projector in a directed beam.
  • This concave form is for example a paraboloid form or other, a home of which is arranged near the lamp 2.
  • This reflector 1 is for example constituted by a sheet or wall made of plastic, on which an aluminum film is deposited.
  • the lamp 2 is for example a discharge lamp with sodium iodides.
  • FIG. 1 There is shown schematically in Figure 1 its discharge tube 2a, and its supply base 2b.
  • the discharge tube 2a extends inside the reflector 1, from its bottom, along the axis of said reflector 1; the 2b supply base extends outside the reflector 1, from the bottom of it and is in support direct on said reflector 1.
  • An annular metal ring 4 surrounds the tube discharge 2 near the reflector 1.
  • This ring metallic 4 is, as will be described later in more detail, linked to the common ground of the system, on which are connected the different masses and pieces of shielding of the various components of the electronic system (control ballast, 12 V and high voltage connectors, etc, ).
  • This ring 4 is used to capture emissions the lamp 2.
  • this metal ring 4 is ends with an outer annular rim 4a which, when the ring 4 is in place on the reflector 1, is interposed between the external face of the reflector and a flange 5 that presents the base 2b of the lamp.
  • the reflector 1 has, on its external face, a or several protrusions 1a - which are used for lamp positioning - against which flange 5 of the base 2b comes to bear, these protuberances being by elsewhere intended to engage in an orifice that the annular rim 4a of the ring 4, to hold said ring 4 in place by relative to reflector 1.
  • the cover 3 forming a concealer is held in place relative to reflector 1 via two fixing lugs 6 extending between said concealer 3 and the reflector 1, these tabs 6 being distributed on one side and on the other side of the discharge tube 2a.
  • These fixing lugs 6 are lugs metal. They are, at their end opposite to the screen 3, pressing against the aluminized face of the reflector 1, at least one of these legs 6 passing through said reflector 1 at an orifice 7 that the latter present (bottom hole or specific bore).
  • This through leg 6 is connected either to the ring located around the base 2b - for example by welding from its end on edge 4a - either to a socket ground outside the reflector 1.
  • the aluminized face of the reflector 1 and the concealer 3 - both of which are likely to constitute radiation emission antennas harmful electromagnetic - are both linked to the mass, which prevents any emission.
  • Attaching the shield 3 to the reflector 1 can be achieved by means of the ring 4, the tabs 6 being scratched through the rim 4a of said ring 4 to ensure at the same time the grounding of the concealer 3 and the mechanical retention of said concealer 3.
  • This projector comprises a reflector 11, a lamp discharge 12 which has a tube 12a and a base 12b, as well as a concealer 13 fixed relative to the reflector 11 by means of fixing lugs 16.
  • a metal ring 14 connected to earth surrounds part 12a of the discharge lamp.
  • This ring metallic 14 does not have an annular rim similar to ledge 4a, but is fixed to the spotlight via legs 18 which extend radially from the outer face of said ring 14 to the fixing lugs 16 of the screen.
  • the screen 13 is for example fixed on the reflector 11 by folding legs 16 on protrusions 19 on the rear side thereof, these legs 16 being otherwise in contact with the face aluminized reflector 11.
  • At least one of the legs 16 is connected to the ground, so that the aluminized face of the reflector 11, the ring 14 and blackout 13 are both grounded.
  • the concealer 13 is in support by means of these fixing lugs 16 on the reflector 11, which prevents movement of the concealer 13 towards the rear of the reflector.
  • FIG. 3 Another variant embodiment of the invention has again illustrated in FIG. 3.
  • the ring 24 is fixed to the fixing lugs 26 by elements which extend radially.
  • the fixing lugs 26 pass through through relative to reflector 21 and folded down in whole or in part on a metal crown 30, fixed by screwing on the reflector 21.
  • the common ground connection is then placed either on one of the fixing lugs 26 of the concealer 23, either on the screwed metal crown 29.
  • the weight gain is achieved by the metallic mask of the reflector.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Description

La présente invention est relative aux projecteurs de véhicules automobiles, et plus particulièrement aux projecteurs du type à lampe à décharge. Le document GB-A-2 249 165 représente par exemple l'état de la technique le plus proche selon le préambule de la revendication 1.The present invention relates to projectors of motor vehicles, and more particularly to discharge lamp type headlamps. The document GB-A-2 249 165 represents for example the state of the art closest according to the preamble of claim 1.

Les projecteurs de véhicules automobiles à lampe à décharge sont alimentés par des courants alternatifs, de préférence de forme carrée, ce qui permet d'augmenter de façon notable la durée de vie des lampes.Motor vehicle headlamps discharges are powered by alternating currents, from preferably square, which increases notably the lifetime of the lamps.

Toutefois, du fait de la richesse des harmoniques présents dans un signal d'alimentation carrée, ces projecteurs émettent des signaux électromagnétiques parasites, nuisibles à l'environnement électronique du véhicule. De tels signaux parasites sont par exemple susceptibles de perturber l'électronique de contrôle du moteur, le système anti-blocage des freins, les autoradios, etc.However, due to the richness of the harmonics present in a square feed signal, these projectors emit electromagnetic signals parasites, harmful to the electronic environment of the vehicle. Such spurious signals are for example likely to disturb the electronic control of the engine, anti-lock brake system, car radios, etc.

Pour résoudre ce problème, il est déjà connu de réaliser un blindage des fils d'alimentation.To solve this problem, it is already known to shield the supply wires.

Toutefois, cette solution ne permet pas de réduire l'émission propre aux éléments à l'intérieur du projecteur, et notamment les émissions de la lampe, via son culot.However, this solution does not reduce the emission specific to the elements inside the projector, including lamp emissions, via his base.

Il a également été proposé d'enfermer la lampe du projecteur dans une cage de FARADAY constituée du réflecteur du projecteur et de la glace avant de celui-ci, ladite glace étant armée d'un grillage réalisé par des fils métalliques de faible diamètre.It was also proposed to lock the lamp of the projector in a FARADAY cage made up of reflector of the headlamp and of the front glass thereof, said ice being armed with a mesh produced by small diameter metal wires.

Cependant, avec cette solution, la transmission optique de la glace armée est atténuée de façon importante, puisqu'elle n'est plus que de l'ordre de 60 à 70 %. Cette chute de transmission fait perdre à la lampe à décharge une partie de son intérêt principal, qui est de procurer un flux lumineux élevé.However, with this solution, the transmission reinforced ice optics are attenuated so important, since it is only around 60 to 70%. This drop in transmission causes the lamp to lose discharges part of its main interest, which is to provide a high luminous flux.

En outre, la lumière est diffractée sur chacune des mailles du grillage, ce qui crée des éblouissements incompatibles avec les prescriptions réglementaires. In addition, the light is diffracted on each chain link mesh, which creates glare incompatible with regulatory requirements.

Un but de l'invention est donc de proposer un projecteur de véhicule automobile dont les sources de bruits parasites sont réduites, sans que les performances optiques du projecteur ne se trouvent atténuées.An object of the invention is therefore to propose a motor vehicle headlamp whose sources of noise is reduced, without performance projector optics are not attenuated.

A cet effet, elle propose un projecteur à lampe à décharge pour véhicule automobile comportant un réflecteur concave dans le fond duquel est disposée une lampe à décharge, caractérisé en ce qu'il comporte, à l'intérieur du réflecteur, une bague métallique qui entoure la lampe à décharge à proximité de son culot et qui est reliée à la masse.To this end, it offers a lamp projector with discharge for a motor vehicle comprising a reflector concave in the bottom of which is placed a lamp with discharge, characterized in that it comprises, inside of the reflector, a metal ring that surrounds the lamp discharge near its base and which is connected to the mass.

Ce projecteur est avantageusement complété par les différentes caractéristiques suivantes prises seules ou selon toutes leurs combinaisons techniquement possibles :

  • il comporte un occulteur et celui-ci est relié à la masse ;
  • la face interne du réflecteur est reliée à la masse ;
  • l'occulteur est fixé mécaniquement par rapport au réflecteur par l'intermédiaire de pattes de fixation, qui sont en appui sur la face interne dudit réflecteur ;
  • au moins une patte de fixation traverse le réflecteur, son extrémité à l'extérieur du réflecteur coopérant avec des moyens complémentaires pour assurer la fixation de ladite patte par rapport au réflecteur ;
  • la bague métallique se termine par un rebord annulaire par lequel elle est fixée sur la face externe du réflecteur ;
  • ladite patte de fixation est fixée sur ledit rebord qui termine la bague ;
  • la bague métallique est fixée sur les pattes de fixation par l'intermédiaire d'éléments qui s'étendent sensiblement radialement entre ladite bague et lesdites pattes ;
  • une patte de fixation qui s'étend à travers le réflecteur est rabattue sur une protubérance externe que présente ledit réflecteur ;
  • une patte de fixation qui s'étend à travers le réflecteur est rabattue sur une couronne métallique vissée extérieurement sur le réflecteur.
This projector is advantageously supplemented by the following different characteristics taken alone or in all their technically possible combinations:
  • it has a concealer and this is connected to ground;
  • the internal face of the reflector is connected to ground;
  • the screen is mechanically fixed relative to the reflector by means of fixing lugs, which are supported on the internal face of said reflector;
  • at least one fixing lug passes through the reflector, its end outside the reflector cooperating with complementary means for ensuring the fixing of said lug relative to the reflector;
  • the metal ring ends with an annular rim by which it is fixed to the external face of the reflector;
  • said fixing lug is fixed to said flange which ends the ring;
  • the metal ring is fixed to the fixing lugs by means of elements which extend substantially radially between said ring and said lugs;
  • a fixing lug which extends through the reflector is folded over an external protuberance which the said reflector has;
  • a fixing lug which extends through the reflector is folded down on a metal crown screwed externally to the reflector.

D'autres caractéristiques et avantages de l'invention ressortiront encore de la description qui suit. Cette description est purement illustrative et non limitative. Elle doit être lue en regard des dessins annexés sur lesquels :

  • la figure 1 est une représentation schématique en coupe d'un projecteur conforme à un mode de réalisation possible pour l'invention ;
  • la figure 2 est une représentation schématique en coupe d'un projecteur conforme à un deuxième mode de réalisation possible pour l'invention ;
  • la figure 3 est une représentation schématique en coupe d'un troisième mode de réalisation possible de l'invention.
Other characteristics and advantages of the invention will emerge from the description which follows. This description is purely illustrative and not limiting. It must be read in conjunction with the appended drawings in which:
  • Figure 1 is a schematic sectional representation of a projector according to a possible embodiment for the invention;
  • Figure 2 is a schematic sectional representation of a projector according to a second possible embodiment for the invention;
  • Figure 3 is a schematic sectional representation of a third possible embodiment of the invention.

Le projecteur illustré sur la figure 1 comporte principalement un réflecteur 1, une lampe 2 et un occulteur 3.The projector illustrated in Figure 1 has mainly a reflector 1, a lamp 2 and a concealer 3.

Le réflecteur 1 a classiquement une forme concave qui réfléchit la lumière émise par la lampe 2 de façon à ce qu'elle sorte du projecteur selon un faisceau dirigé. Cette forme concave est par exemple une forme paraboloide ou autre, dont un foyer est disposé à proximité de la lampe 2.The reflector 1 conventionally has a concave shape which reflects the light emitted by the lamp 2 so as to what it leaves the projector in a directed beam. This concave form is for example a paraboloid form or other, a home of which is arranged near the lamp 2.

Ce réflecteur 1 est par exemple constitué par une tôle ou une paroi en une matière plastique, sur laquelle est déposé un film d'aluminium.This reflector 1 is for example constituted by a sheet or wall made of plastic, on which an aluminum film is deposited.

La lampe 2 est par exemple une lampe à décharge aux iodures de sodium.The lamp 2 is for example a discharge lamp with sodium iodides.

On a représenté schématiquement sur la figure 1 son tube à décharge 2a, et son culot d'alimentation 2b. Le tube à décharge 2a s'étend à l'intérieur du réflecteur 1, à partir de son fond, selon l'axe dudit réflecteur 1 ; le culot 2b d'alimentation s'étend à l'extérieur du réflecteur 1, à partir du fond de celui-ci et est en appui direct sur ledit réflecteur 1.There is shown schematically in Figure 1 its discharge tube 2a, and its supply base 2b. The discharge tube 2a extends inside the reflector 1, from its bottom, along the axis of said reflector 1; the 2b supply base extends outside the reflector 1, from the bottom of it and is in support direct on said reflector 1.

Une bague métallique annulaire 4 entoure le tube à décharge 2 à proximité du réflecteur 1. Cette bague métallique 4 est, ainsi que cela sera décrit plus loin plus en détails, reliée à la masse commune du système, sur laquelle sont reliés les différentes masses et pièces de blindage des différents composants du système électronique (ballast de commande, connectique 12 V et haute tension, etc, ...). Cette bague 4 sert à capter les émissions électromagnétiques de la lampe 2.An annular metal ring 4 surrounds the tube discharge 2 near the reflector 1. This ring metallic 4 is, as will be described later in more detail, linked to the common ground of the system, on which are connected the different masses and pieces of shielding of the various components of the electronic system (control ballast, 12 V and high voltage connectors, etc, ...). This ring 4 is used to capture emissions the lamp 2.

Plus précisément, cette bague métallique 4 se termine par un rebord annulaire extérieur 4a qui, lorsque la bague 4 est en place sur le réflecteur 1, est interposé entre la face externe du réflecteur et un rebord 5 que présente le culot 2b de la lampe.More specifically, this metal ring 4 is ends with an outer annular rim 4a which, when the ring 4 is in place on the reflector 1, is interposed between the external face of the reflector and a flange 5 that presents the base 2b of the lamp.

Le réflecteur 1 présente, sur sa face externe, une ou plusieurs protubérances 1a - qui servent au positionnement de la lampe - contre lesquelles le rebord 5 du culot 2b vient en appui, ces protubérances étant par ailleurs destinées à s'engager dans un orifice complémentaire que présente le rebord annulaire 4a de la bague 4, pour maintenir ladite bague 4 en place par rapport au réflecteur 1.The reflector 1 has, on its external face, a or several protrusions 1a - which are used for lamp positioning - against which flange 5 of the base 2b comes to bear, these protuberances being by elsewhere intended to engage in an orifice that the annular rim 4a of the ring 4, to hold said ring 4 in place by relative to reflector 1.

Le cache 3 formant occulteur est maintenu en place par rapport au réflecteur 1 par l'intermédiaire de deux pattes de fixation 6 s'étendant entre ledit occulteur 3 et le réflecteur 1, ces pattes 6 étant réparties de part et d'autre du tube à décharge 2a.The cover 3 forming a concealer is held in place relative to reflector 1 via two fixing lugs 6 extending between said concealer 3 and the reflector 1, these tabs 6 being distributed on one side and on the other side of the discharge tube 2a.

Ces pattes de fixation 6 sont des pattes métalliques. Elles sont, à leur extrémité opposée à l'occulteur 3, en appui contre la face aluminée du réflecteur 1, au moins l'une de ces pattes 6 traversant ledit réflecteur 1 au niveau d'un orifice 7 que celui-ci présente (trou de fond ou alésage spécifique).These fixing lugs 6 are lugs metal. They are, at their end opposite to the screen 3, pressing against the aluminized face of the reflector 1, at least one of these legs 6 passing through said reflector 1 at an orifice 7 that the latter present (bottom hole or specific bore).

Cette patte 6 traversante est reliée soit à la bague située autour du culot 2b - par exemple par soudure de son extrémité sur le bord 4a - soit à une prise de masse à l'extérieur du réflecteur 1.This through leg 6 is connected either to the ring located around the base 2b - for example by welding from its end on edge 4a - either to a socket ground outside the reflector 1.

Ainsi, la face aluminée du réflecteur 1 et l'occulteur 3 - qui sont tous deux susceptibles de constituer des antennes d'émission de rayonnements électromagnétiques nuisibles - sont tous deux reliés à la masse, ce qui empêche toute émission.Thus, the aluminized face of the reflector 1 and the concealer 3 - both of which are likely to constitute radiation emission antennas harmful electromagnetic - are both linked to the mass, which prevents any emission.

La fixation de l'occulteur 3 sur le réflecteur 1 peut être réalisée au moyen de la bague 4, les pattes 6 étant griffées au travers du rebord 4a de ladite bague 4 pour assurer en même temps la mise à la masse de l'occulteur 3 et le maintien mécanique dudit occulteur 3.Attaching the shield 3 to the reflector 1 can be achieved by means of the ring 4, the tabs 6 being scratched through the rim 4a of said ring 4 to ensure at the same time the grounding of the concealer 3 and the mechanical retention of said concealer 3.

Une autre variante de réalisation a encore été illustrée sur la figure 2.Another alternative embodiment has been illustrated in figure 2.

On a repris pour les éléments du projecteur de la figure 1 que l'on retrouve sur le projecteur de la figure 2, la même numérotation de référence augmentée de 10.We took over for the projector elements of the Figure 1 found on the projector of Figure 2, the same reference numbering increased by 10.

Ce projecteur comporte un réflecteur 11, une lampe à décharge 12 qui présente un tube 12a et un culot 12b, ainsi qu'un occulteur 13 fixé par rapport au réflecteur 11 par l'intermédiaire de pattes de fixation 16.This projector comprises a reflector 11, a lamp discharge 12 which has a tube 12a and a base 12b, as well as a concealer 13 fixed relative to the reflector 11 by means of fixing lugs 16.

Une bague métallique 14 reliée à la masse entoure la partie 12a de la lampe à décharge. Cette bague métallique 14 ne comporte pas de rebord annulaire semblable au rebord 4a, mais est fixée sur le projecteur par l'intermédiaire de pattes 18 qui s'étendent radialement à partir de la face externe de ladite bague 14 jusqu'aux pattes de fixation 16 de l'occulteur.A metal ring 14 connected to earth surrounds part 12a of the discharge lamp. This ring metallic 14 does not have an annular rim similar to ledge 4a, but is fixed to the spotlight via legs 18 which extend radially from the outer face of said ring 14 to the fixing lugs 16 of the screen.

L'occulteur 13 est par exemple fixé sur le réflecteur 11 par rabattement de pattes 16 sur des protubérances 19 sur la face arrière de celui-ci, ces pattes 16 étant par ailleurs en contact avec la face aluminée du réflecteur 11.The screen 13 is for example fixed on the reflector 11 by folding legs 16 on protrusions 19 on the rear side thereof, these legs 16 being otherwise in contact with the face aluminized reflector 11.

Au moins l'une des pattes 16 est reliée à la masse, de sorte que la face aluminée du réflecteur 11, la bague 14 et l'occulteur 13 sont tout deux à la masse.At least one of the legs 16 is connected to the ground, so that the aluminized face of the reflector 11, the ring 14 and blackout 13 are both grounded.

L'occulteur 13 est en appui par l'intermédiaire de ces pattes de fixation 16 sur le réflecteur 11, ce qui empêche les mouvements de l'occulteur 13 vers l'arrière du réflecteur.The concealer 13 is in support by means of these fixing lugs 16 on the reflector 11, which prevents movement of the concealer 13 towards the rear of the reflector.

Une autre variante de réalisation de l'invention a encore été illustrée sur la figure 3.Another variant embodiment of the invention has again illustrated in FIG. 3.

On a repris pour les éléments de la variante de la figure 1 qui se retrouve sur cette variante les mêmes numérotations de référence augmentées de 20.We took over for the elements of the variant of the Figure 1 which is found on this variant the same reference numbering increased by 20.

Comme dans le cas de la variante illustrée sur la figure 2, la bague 24 est fixée aux pattes de fixation 26 par des éléments qui s'étendent radialement.As in the case of the variant illustrated on the Figure 2, the ring 24 is fixed to the fixing lugs 26 by elements which extend radially.

Les pattes de fixation 26 sont traversantes par rapport au réflecteur 21 et rabattues en tout ou partie sur une couronne métallique 30, fixée par vissage sur le réflecteur 21.The fixing lugs 26 pass through through relative to reflector 21 and folded down in whole or in part on a metal crown 30, fixed by screwing on the reflector 21.

La prise de masse commune est alors disposée soit sur l'une des pattes de fixation 26 de l'occulteur 23, soit sur la couronne métallique vissée 29.The common ground connection is then placed either on one of the fixing lugs 26 of the concealer 23, either on the screwed metal crown 29.

En variante encore, il peut être prévu que la prise de masse s'effectue par le masque métallisé du réflecteur.As a further variant, it can be provided that the weight gain is achieved by the metallic mask of the reflector.

Claims (10)

  1. Headlight with a discharge lamp for a motor vehicle having a concave reflector (1, 11, 21) in the bottom of which there is disposed a discharge lamp (2, 12, 22), characterised in that it has, inside the reflector (1, 11, 21), a metallic ring (4, 14, 24) which surrounds the discharge lamp (2, 12, 22) close to its cap and which is connected to earth.
  2. Headlight according to Claim 1, having a shield, characterised in that the said shield (3, 13, 23) is connected to earth.
  3. Headlight according to one of the preceding claims, characterised in that the internal face of the reflector (1, 11, 21) is connected to earth.
  4. Headlight according to Claims 2 and 3 taken in combination, characterised in that the shield (3, 13, 23) is fixed mechanically with respect to the reflector (1, 11, 21) by means of fixing lugs (6, 16, 26), which are in abutment on the internal face of the said reflector (1, 11, 21).
  5. Headlight according to Claim 4, characterised in that at least one fixing lug (6, 16, 26) passes through the reflector, its end outside the reflector cooperating with complementary means for ensuring the fixing of the said lug with respect to the reflector.
  6. Headlight according to one of the preceding claims, characterised in that the metallic ring (4) terminates in an annular rim (4a) by means of which it is fixed to the external face of the reflector.
  7. Headlight according to Claims 5 and 6, characterised in that the said fixing lug is fixed to the said rim (4a) which terminates the ring.
  8. Headlight according to Claim 4, characterised in that the metallic ring is fixed to the fixing lugs by means of elements (18, 28) which extend substantially radially between the said ring and the said lugs.
  9. Headlight according to Claims 5 and 8 taken in combination, characterised in that a fixing lug which extends through the reflector is folded back over an external protuberance (19) on the said reflector.
  10. Headlight according to Claims 5 and 8 taken in combination, characterised in that a fixing lug which extends through the reflector is folded back over a metallic annulus (30) screwed externally onto the reflector.
EP97402709A 1996-11-13 1997-11-13 Headlamp comprising an arc discharge bulb Expired - Lifetime EP0843125B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98120777A EP0898113B1 (en) 1996-11-13 1997-11-13 Headlamp with gas discharge lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9613799 1996-11-13
FR9613799A FR2755747B1 (en) 1996-11-13 1996-11-13 DISCHARGE LAMP PROJECTOR

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP98120777A Division EP0898113B1 (en) 1996-11-13 1997-11-13 Headlamp with gas discharge lamp

Publications (2)

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EP0843125A1 EP0843125A1 (en) 1998-05-20
EP0843125B1 true EP0843125B1 (en) 2002-02-20

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ID=9497552

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97402709A Expired - Lifetime EP0843125B1 (en) 1996-11-13 1997-11-13 Headlamp comprising an arc discharge bulb
EP98120777A Expired - Lifetime EP0898113B1 (en) 1996-11-13 1997-11-13 Headlamp with gas discharge lamp

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP98120777A Expired - Lifetime EP0898113B1 (en) 1996-11-13 1997-11-13 Headlamp with gas discharge lamp

Country Status (5)

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EP (2) EP0843125B1 (en)
JP (1) JP4229995B2 (en)
DE (2) DE69718309T2 (en)
ES (2) ES2170349T3 (en)
FR (1) FR2755747B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767377B1 (en) * 1998-10-13 2000-05-26 Valeo Vision DISCHARGE LAMP PROJECTOR
JP3854421B2 (en) * 1999-02-23 2006-12-06 株式会社小糸製作所 Vehicle lamp having a discharge bulb
FR2816035B1 (en) * 2000-10-30 2003-04-11 Valeo Vision MOTOR VEHICLE PROJECTOR WITH IMPROVED ELECTROMAGNETIC SHIELDING MEANS
CN109716022B (en) * 2016-09-22 2021-01-15 昕诺飞控股有限公司 Core slot box type lamp support clamping and grounding assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101722A1 (en) * 1990-04-04 1991-10-10 Bosch Gmbh Robert HEADLIGHTS FOR MOTOR VEHICLES
JPH0740442B2 (en) * 1990-07-23 1995-05-01 株式会社小糸製作所 Vehicle headlights
US5343370A (en) * 1990-10-23 1994-08-30 Koito Manufacturing Co., Ltd. Motor vehicle headlamp
DE4139905A1 (en) * 1991-12-04 1993-06-09 Robert Bosch Gmbh, 7000 Stuttgart, De Plug connector for gas discharge lamp connected in spotlight holder - has plastics material plug housing releasably attached to spotlight holder contg. HV cable leads separated from each other by plastics material
DE4310307B4 (en) * 1993-03-30 2004-10-14 Robert Bosch Gmbh Headlights for vehicles
FR2732654B1 (en) * 1995-04-06 1997-06-20 Valeo Vision PROJECTOR FOR A MOTOR VEHICLE WITH AN ALTERNATIVE LAMP
JP3159078B2 (en) * 1996-08-30 2001-04-23 株式会社デンソー High pressure discharge lamp device

Also Published As

Publication number Publication date
DE69710559D1 (en) 2002-03-28
EP0843125A1 (en) 1998-05-20
EP0898113B1 (en) 2003-01-08
DE69718309T2 (en) 2003-10-23
ES2186076T3 (en) 2003-05-01
FR2755747A1 (en) 1998-05-15
ES2170349T3 (en) 2002-08-01
DE69718309D1 (en) 2003-02-13
FR2755747B1 (en) 1999-01-29
DE69710559T2 (en) 2003-01-09
JP4229995B2 (en) 2009-02-25
JPH10162605A (en) 1998-06-19
EP0898113A1 (en) 1999-02-24

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