EP1679472B1 - Device for fastening a lamp to a lampholder of a vehicle headlamp - Google Patents

Device for fastening a lamp to a lampholder of a vehicle headlamp Download PDF

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Publication number
EP1679472B1
EP1679472B1 EP06290019.6A EP06290019A EP1679472B1 EP 1679472 B1 EP1679472 B1 EP 1679472B1 EP 06290019 A EP06290019 A EP 06290019A EP 1679472 B1 EP1679472 B1 EP 1679472B1
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EP
European Patent Office
Prior art keywords
ring
lamp
lamp holder
flexible
flexible ring
Prior art date
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Application number
EP06290019.6A
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German (de)
French (fr)
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EP1679472A2 (en
EP1679472A3 (en
Inventor
Daniel Josquin
Jean Masse
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP1679472A2 publication Critical patent/EP1679472A2/en
Publication of EP1679472A3 publication Critical patent/EP1679472A3/en
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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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • 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
    • F21S41/10—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 invention relates to a system for fixing a lamp of the discharge lamp type, also called xenon lamp, on a lamp holder of a lighting and / or signaling device, of the projector type, of a motor vehicle.
  • the invention has applications in the field of the automobile and, more specifically, in the field of lighting of motor vehicles. It aims, in particular, to develop a quick fixing of a discharge lamp with the possibility of interchangeability between different models of discharge lamps.
  • the lighting devices are provided with light sources which can be of different kinds.
  • the vehicle headlamps can be equipped with several light sources, which can be of two different kinds, for example: a halogen lamp and a discharge lamp.
  • the light source is equipped with a high voltage module that provides power to the lamp of the discharge lamp.
  • each of these lamps includes a discharge bulb, a bulb foot and a high voltage module.
  • the high voltage module is immovably fixed in the case of a lamp D1 and, conversely, removably in the case of a lamp D2.
  • the high voltage module is an integral part of the lamp. More specifically, the discharge bulb is surmounted by a high voltage module, integral with said bulb. This module most often has an outer contour generally substantially square, a relatively small footprint compared to a lamp D2 and its module, which will be described later.
  • the change of this bulb and high voltage module assembly is relatively difficult because, firstly, of the difficulty of access to the lamp D1 and operations to be performed to remove the faulty assembly and install the new set and the fact , on the other hand, risks due to the high voltage present in the module.
  • the high voltage module is not integrated in the lamp; it constitutes an independent piece, removably mounted on the lamp: it is fixed on the bulb after the introduction of the bulb in the reflector. It is therefore possible, during the assembly and disassembly of the projector, to disconnect the high voltage module from the bulb.
  • This has a certain advantage over the lamp D1. Indeed, with a lamp D2, it is possible, when the bulb is defective, to change only the bulb and keep the high voltage module initial. However, changing a bulb in a D2 lamp is even more delicate than changing the bulb and module assembly for a D1 lamp. Indeed, in the difficult place of access that is a projector, the user must first remove the module, and remove the bulb; he must then change the bulb and put the module back on the bulb, with all the risks inherent to the high voltage in the module.
  • the geometry and the bulk of the lamps D1 and D2 are different. Different fixing systems are therefore necessary to fix a lamp D1 and a lamp D2 on a lamp holder reflector.
  • the lamps D1 and D2 are not interchangeable in the same projector.
  • fixing rings removable, fixed on the reflectors of the projectors by screw systems. These screw systems require, on the part of the user, a series of rotational movements.
  • the environment of a lamp in a projector is relatively small, which makes these rotational movements difficult and painful to achieve for the user.
  • the screw systems are, by nature, removable.
  • a vehicle in operation vibrates. And, the vibrations of this vehicle can cause a progressive unscrewing of the ring and, consequently, an undesirable disassembly of the lamp.
  • some fastening systems are equipped with a locking means.
  • This locking means may be, for example, a spring-type spring leaf system which bears on the high voltage module of the lamp, preventing any unplanned disassembly.
  • a spring-type spring leaf system which bears on the high voltage module of the lamp, preventing any unplanned disassembly.
  • closing such a spring blade system requires additional movement on the part of the user, which further complicates the bulb change by the user.
  • the actuation of such a leaf spring causes a relatively large clearance, inappropriate for a small environment such as that of a projector.
  • the document FR 2 805 599 A1 describes a device according to the preamble of claim 1.
  • the object of the invention is precisely to overcome the disadvantages of the techniques described above by providing an improved fixing system for lamp D1 and lamp D2, and which is in particular non-removable and / or simpler to implement.
  • This fastening system makes it possible to hold and lock the discharge bulb with the lamp holder.
  • the invention uses the assembly of an immovable flexible ring on the projector lamp holder and a rigid ring movable relative to the flexible ring.
  • the invention also relates to a motor vehicle, which comprises at least one lighting and / or signaling device described above.
  • the figure 1 represents an example of a fastening system according to the invention mounted around a light source D2.
  • This figure shows a lamp 1 mounted on a counterpart 2 of the projector by means of a fastening system 3.
  • the counterpart 2 is the part of the projector comprising a reflector 21 and a lamp holder 22.
  • the lamp holder 22 and the reflector 21 together form a single piece 2.
  • the lamp holder can also not integral part of the reflector 21; in this case, it is fixed integrally to the reflector at the time of mounting the projector.
  • the lamp holder 22 for example of cylindrical shape, has the role of supporting the discharge bulb of the lamp 1. It also allows to center and orient the bulb inside the reflector 21.
  • the fastening system 3 of the invention is mounted around this lamp holder 22.
  • the fastening system 3 comprises a rigid ring 4 and a flexible ring 5 assembled so that the rigid ring is movable relative to the flexible ring.
  • the flexible ring 5 has contact tongues 51 which provide electrical contact with the high voltage module of the lamp 1.
  • the figure 2 represents a fastening system of the invention mounted around a lamp D1.
  • This figure 2 shows the counterpart 2 of the headlamp, with the reflector 21 and the lamp holder 22, on which is mounted the fixing system 3 of the invention and the lamp 6.
  • the fastening system 3 comprises a rigid ring 4 and a flexible ring 5 assembled so that the rigid ring is movable relative to the flexible ring.
  • the flexible ring 5 comprises contact tabs, not visible on this figure 2 , which provide electrical contact with the high voltage module of the lamp 4.
  • the fastening system 3 comprises a rigid ring represented on the figure 4 and a flexible ring shown on the Figures 3A and 3B .
  • a D1 lamp or a D2 lamp the rigid ring is identical.
  • the flexible ring differs according to whether it is a D1 lamp or a D2 lamp. As will be seen later, this difference essentially relates to the contact tabs.
  • the characteristics of the flexible ring other than the contact tongues are the same for a lamp ring D1 as for a lamp ring D2.
  • This flexible ring 5 is electrically conductive. It is made of a flexible and electrically conductive material, such as hardened steel. It thus ensures an electrical function, at the same time, by internal contact on the counterpart and by contact of the contact tabs on the high voltage module of the lamp.
  • This flexible ring 5 has a shape substantially circular; more specifically, it has a circular shape when the fastening system is in the locked position; it is circular in segments, or sectors, when the fastening system is in the unlocked position. In other words, the flexible ring 5 has a tangential spacing greater at one point than at another point, that is to say, greater at the end of the segment than at the beginning of the segment.
  • This flexible ring 5 comprises a plurality of tongues or claws, such as, for example, the holding tabs 51, whose role is to ensure the axial temporary retention between the rigid ring and the flexible ring 5 and the attachment claws 52 which lock the lamp in the fixing system.
  • These tongues ensure the maintenance of the flexible ring in the ring, especially when the projecting sector 42 of the ring is fitted into one of the cavities of the flexible ring.
  • the holding tabs 51 also constitute the contact tabs of the fastening system, that is to say the tabs that provide electrical continuity and the electromagnetic shielding between the high voltage module and the counterpart of the projector.
  • this flexible ring 5 comprises at least two fixing lugs 53 able to fit into fastening means of the counterpart.
  • These fixing lugs 53 are located at the base of the ring 5, that is to say on the circumference of the ring opposite to the contact tongues 51. They each comprise at least one bezel 54, that is, that is to say, an orifice made in the fixing lug, intended to hang in a harpoon of the counterpart.
  • the end of each fixing lug 53 may comprise a chamfer 55, at its free end, adapted to abut against locking lugs of the rigid ring.
  • the flexible ring 5 also comprises a positioning clip 50 of the ring in the rigid ring.
  • This clip 50 is a tab folded at its free end to form a hook.
  • This clip 50 provides an angular positioning of the flexible ring 5 relative to the rigid ring, before assembling the ring / ring assembly on the counterpart.
  • the clip ensures the positioning of the ring after locking the lamp.
  • this clip 50 is intended to be housed in a cavity of the rigid ring.
  • the flexible ring 5 can be made by cutting and forming in a metal plate.
  • This metal plate may be a steel plate, treated after cutting and forming. Each claw, leg and other tabs are made by cutting and folding.
  • the circular shape of the ring is obtained by forming the cut plate.
  • the cut and shaped plate is latched, in its circular form, by a fastening system 58.
  • This fastening system 58 may comprise a hook 56 obtained by forming a tongue at one end of the metal plate and a bezel 57 obtained by cutting in the other end of said metal plate.
  • the hook 56 is inserted into the bezel 57 to keep the ring closed.
  • the bezel 57 may comprise two tips called "fir" which ensure a non-removable connection.
  • the figure 3B represents an example of flexible ring for lamp D2.
  • This flexible ring 5 comprises, as previously explained, holding tabs 51, contact tabs 59, fastening claws 52, fixing tabs 53 each with a bezel 54 and a bevel 55 and a positioning clip 50.
  • the contact tongues 59 are longer than the contact tabs 51 of the lamp ring D1, because they must ensure electrical contact with the outside of the connector of the high voltage module of the lamp D2 .
  • the contact tongues provide electrical contact with a metal zone located under the connector of the lamp D1.
  • the holding tabs 51 are also longer than the holding tabs 51 of the figure 3A because they also act as contact tabs with the connector. They therefore have substantially the same shape as the contact tabs 59 in their free end, but they are cut and folded at their base so as to form a hook that can receive a projecting sector of the rigid ring and can be inserted in a space from the bulb foot of the D2 lamp.
  • the flexible ring 5 is mounted in a rigid ring 4.
  • This rigid ring is made of a non-flexible material such as plastic or stainless steel.
  • This rigid ring 4 has projecting sectors 42, or cams, in the upper part of the ring 4, that is to say on the base of the ring located near the lamp. These salient areas are planned to fit into the hooks formed by the holding tabs 51 of the flexible ring 5. The positioning of these projecting sectors 42 in the holding tabs 51 of the flexible ring 5 ensures the axial retention of the flexible ring in the ring during assembly.
  • the rigid ring 4 also comprises centering sectors 41 disposed on the inner wall of said ring and ensuring a centering of the ring / ring assembly on the lamp holder. These centering sectors 41 are located in an area of the inner wall of the ring which, after assembly with the flexible ring, is covered by said ring.
  • the rigid ring 4 further comprises at least one cavity 43 intended to receive the clip 50.
  • This cavity 43 is formed in the thickness of the wall of the ring. It preferably has a V shape adapted to receive the hook of the positioning clip 50 of the flexible ring 5.
  • This clip in position in the cavity 43 of the ring ensures the angular positioning of the ring relative to the ring when assembly.
  • a second cavity may be present (not shown in the figures), to ensure the positioning of the ring after locking the lamp.
  • the rigid ring 4 also has locking lugs 44 which ensure the locking of the ring on the lamp holder.
  • These lugs 44 are located at the base of the ring 4, that is to say on the lower part of the wall of the ring, in prominence of this wall.
  • These lugs 44 each comprise a clearance 45, that is to say a central area less prominent, which allows the engagement of the ring 4 on the lamp holder, without interfering with harpoons 24 of the lamp holder.
  • These lugs 44 allow to orient the ring on the lamp holder.
  • These lugs can be of different sizes and shapes, thus providing a keying role during assembly on the lamp holder.
  • this assembly can be mounted on the lamp holder of the projector.
  • FIG. 5 An example of a counterpart capable of receiving the fastening system 3 of the invention is represented on the figure 5 .
  • This counterpart 2 comprises a reflector 21 and a lamp holder 22. Is shown the axis XX 'of the assembly of the ring 4.
  • This lamp holder 22 has a cylindrical shape having an external surface 23 equipped with different protuberances intended to fit into the rigid ring 4 or the flexible ring 5. More specifically, the lamp holder comprises, on its outer surface 23 , harpoons 24 adapted to fit into the glasses 54 of the fixing lugs 53 of the flexible ring 5.
  • These harpoons can be beveled with a portion flared downwards, that is to say towards the reflector, so that the connection between the ring and the lamp holder is undetachable by traction.
  • These harpoons 24, associated with the fixing lugs 53 of the flexible ring, thus ensure the attachment of said ring 5 to the counterpart 2 and the mechanical tensile strength of the ring 5 in the locking position.
  • the lamp holder 22 also has a circular projecting ring 25 located on the outer contour of said lamp holder.
  • This projecting crown 25 serves to guide the displacement of the locking lugs 44 of the ring 4.
  • this ring 25 has a rectangular section.
  • the lower face 28 of this projecting ring ensures a resistance of the pins to all the traction in the X direction, when the ring is in the locked position.
  • the upper face 29 of this ring limits the penetration of the lamp holder in the direction X ', through the centering sectors 41 of the rigid ring 4.
  • the projecting crown 25 has clearances 27 ensuring the passage of the locking lugs 44 of the ring 4.
  • the harpoons 24 are located in these clearances 27. It also comprises at least one stop 26, made in its lower face, limiting the movement of locking lugs 44 of the ring 4.
  • FIG. 6 the lamp holder 22 is shown on which the flexible ring 5 is mounted. It is clearly understood that this figure is an explanatory view of the counter-ring assembly and that this assembly does not have to be, in reality, since the flexible ring 5 is mounted in the ring 4 before being mounted on the lamp holder.
  • This figure 6 shows a flexible ring 5 for lamp D2, with its contact tabs 59, its holding tabs 51, its fixing claws 52 and its clip 50.
  • figure 6 also shows a lamp holder 22 with its crown 25 and its harpoons 24. As seen in this figure, the harpoon 24 of the lamp holder 22 is inserted into the bezel 54 of the fixing lug 53 of the ring 5.
  • the ring 5 is fixed on the lamp holder 22 irremovably. Disassembly of the assembly is made impossible when the ring 4 is in place around the ring 5, making the harpo 24 inaccessible to the user.
  • the ring is stationary relative to the lamp holder.
  • the rigid ring is mobile with respect to the flexible ring 5 and, consequently, to the lamp holder 22.
  • This ring 4 is free to rotate around the ring 5 within the limit of a predefined angular value, depending on the length of a segment containing fixing claws 52 and a retaining tab 51 and the location of the cavity 43 on the rigid ring.
  • the fastening system is mounted on the lamp holder, only the rigid ring can be moved from a locked position to an unlocked position, and vice versa, to allow replacement of the lamp in the projector.
  • the locking direction is predetermined by the stop 26 of the lamp holder.
  • said ring may include gripping lugs 46 located on the outer face of the ring.
  • the lugs 44 of the ring are passed behind the projecting ring 25 of the lamp holder.
  • the ring can then withstand all the mechanical stresses exerted on the lamp or the connector. It is solid with the reflector.

Description

Domaine de l'inventionField of the invention

L'invention concerne un système de fixation d'une lampe du type lampe à décharge, appelée aussi lampe xénon, sur un porte lampe d'un dispositif d'éclairage et/ou de signalisation, du type projecteur, de véhicule automobile. L'invention trouve des applications dans le domaine de l'automobile et, plus précisément, dans le domaine de l'éclairage des véhicules automobiles. Elle a pour but, en particulier, de mettre au point une fixation rapide d'une lampe à décharge avec possibilité d'interchangeabilité entre différents modèles de lampes à décharge.The invention relates to a system for fixing a lamp of the discharge lamp type, also called xenon lamp, on a lamp holder of a lighting and / or signaling device, of the projector type, of a motor vehicle. The invention has applications in the field of the automobile and, more specifically, in the field of lighting of motor vehicles. It aims, in particular, to develop a quick fixing of a discharge lamp with the possibility of interchangeability between different models of discharge lamps.

Etat de la techniqueState of the art

Actuellement, les dispositifs d'éclairage sont munis de sources lumineuses qui peuvent être de différentes sortes. En particulier, les projecteurs des véhicules peuvent être équipés de plusieurs sources lumineuses, qui peuvent être de deux sortes différentes, par exemple : une lampe halogène et une lampe à décharge. Dans le cas d'une lampe à décharge, la source lumineuse est équipée d'un module haute tension qui assure l'alimentation électrique de l'ampoule de la lampe à décharge.Currently, the lighting devices are provided with light sources which can be of different kinds. In particular, the vehicle headlamps can be equipped with several light sources, which can be of two different kinds, for example: a halogen lamp and a discharge lamp. In the case of a discharge lamp, the light source is equipped with a high voltage module that provides power to the lamp of the discharge lamp.

Parmi les lampes à décharge, il existe plusieurs modèles de lampes dont les principaux sont la lampe dite D1 et la lampe dite D2. Chacune de ces lampes comporte une ampoule à décharge, un pied d'ampoule et un module haute tension. Le module haute tension est fixé de manière inamovible, dans le cas d'une lampe D1 et, au contraire, de manière amovible dans le cas d'une lampe D2.Among the discharge lamps, there are several lamp models, the main ones are the so-called lamp D1 and the lamp called D2. Each of these lamps includes a discharge bulb, a bulb foot and a high voltage module. The high voltage module is immovably fixed in the case of a lamp D1 and, conversely, removably in the case of a lamp D2.

Dans le cas d'une lampe D1, le module haute tension fait partie intégrante de la lampe. Plus précisément, l'ampoule à décharge est surmontée d'un module haute tension, solidaire de ladite ampoule. Ce module a le plus souvent un contour extérieur généralement sensiblement carré, d'un encombrement relativement faible par rapport à une lampe D2 et son module, qui seront décrits ultérieurement. Le changement de cet ensemble ampoule et module haute tension est relativement délicat du fait, d'une part, de la difficulté d'accès à la lampe D1 et des opérations à effectuer pour retirer l'ensemble défaillant et installer le nouvel ensemble et du fait, d'autre part, des risques dus à la haute tension présente dans le module.In the case of a lamp D1, the high voltage module is an integral part of the lamp. More specifically, the discharge bulb is surmounted by a high voltage module, integral with said bulb. This module most often has an outer contour generally substantially square, a relatively small footprint compared to a lamp D2 and its module, which will be described later. The change of this bulb and high voltage module assembly is relatively difficult because, firstly, of the difficulty of access to the lamp D1 and operations to be performed to remove the faulty assembly and install the new set and the fact , on the other hand, risks due to the high voltage present in the module.

Dans le cas d'une lampe D2, le module haute tension n'est pas intégré dans la lampe ; il constitue une pièce indépendante, montée de façon amovible sur la lampe : il est fixé sur l'ampoule après la mise en place de l'ampoule dans le réflecteur. Il est donc possible, lors du montage et du démontage du projecteur, de désolidariser le module haute tension de l'ampoule. Ceci présente un avantage certain par rapport à la lampe D1. En effet, avec une lampe D2, il est possible, lorsque l'ampoule est défaillante, de ne changer que l'ampoule et de conserver le module haute tension initial. Cependant, le changement d'une ampoule dans une lampe D2 est encore plus délicat que le changement de l'ensemble ampoule et module pour une lampe D1. En effet, dans le lieu difficile d'accès qu'est un projecteur, l'utilisateur doit d'abord retirer le module, et retirer l'ampoule ; il doit ensuite changer l'ampoule et remettre le module sur l'ampoule, avec tous les risques inhérents à la haute tension dans le module.In the case of a lamp D2, the high voltage module is not integrated in the lamp; it constitutes an independent piece, removably mounted on the lamp: it is fixed on the bulb after the introduction of the bulb in the reflector. It is therefore possible, during the assembly and disassembly of the projector, to disconnect the high voltage module from the bulb. This has a certain advantage over the lamp D1. Indeed, with a lamp D2, it is possible, when the bulb is defective, to change only the bulb and keep the high voltage module initial. However, changing a bulb in a D2 lamp is even more delicate than changing the bulb and module assembly for a D1 lamp. Indeed, in the difficult place of access that is a projector, the user must first remove the module, and remove the bulb; he must then change the bulb and put the module back on the bulb, with all the risks inherent to the high voltage in the module.

Comme on le comprend à la lecture de ce qui précède, la géométrie et l'encombrement des lampes D1 et D2 sont différents. Des systèmes de fixation différents sont donc nécessaires pour fixer une lampe D1 et une lampe D2 sur un porte lampe de réflecteur. Les lampes D1 et D2 ne sont donc pas interchangeables dans un même projecteur. Pour permettre l'interchangeabilité de ces lampes, il existe des bagues de fixation, amovibles, fixées sur les réflecteurs des projecteurs par des systèmes à vis. Ces systèmes à vis nécessitent, de la part de l'utilisateur, une série de mouvements de rotation. Or, comme expliqué précédemment, l'environnement d'une lampe dans un projecteur est relativement exigu, ce qui rend ces mouvements de rotation difficiles et pénibles à réaliser pour l'utilisateur.As can be understood from reading the foregoing, the geometry and the bulk of the lamps D1 and D2 are different. Different fixing systems are therefore necessary to fix a lamp D1 and a lamp D2 on a lamp holder reflector. The lamps D1 and D2 are not interchangeable in the same projector. To allow the interchangeability of these lamps, there are fixing rings, removable, fixed on the reflectors of the projectors by screw systems. These screw systems require, on the part of the user, a series of rotational movements. However, as explained above, the environment of a lamp in a projector is relatively small, which makes these rotational movements difficult and painful to achieve for the user.

Par ailleurs, les systèmes à vis sont, par nature, démontables. Or, un véhicule en fonctionnement vibre. Et, les vibrations de ce véhicule peuvent entraîner un dévissage progressif de la bague et, par conséquent, un démontage indésirable de la lampe. Aussi, pour assurer un maintien en position du système de fixation sur le réflecteur, certains systèmes de fixation sont équipés d'un moyen de verrouillage. Ce moyen de verrouillage peut être, par exemple, un système à ressort du type lame de ressort qui assure un appui sur le module haute tension de la lampe, empêchant tout démontage inopiné. Un tel système est décrit dans le brevet EP 1 065 438 . Cependant, la fermeture d'un tel système de lame de ressort nécessite un mouvement supplémentaire de la part de l'utilisateur, ce qui complique encore le changement d'ampoule par l'utilisateur. En outre, l'actionnement d'une telle lame de ressort entraîne un débattement relativement important, inapproprié pour un environnement exigu comme celui d'un projecteur.Moreover, the screw systems are, by nature, removable. However, a vehicle in operation vibrates. And, the vibrations of this vehicle can cause a progressive unscrewing of the ring and, consequently, an undesirable disassembly of the lamp. Also, to maintain a position of the fastening system on the reflector, some fastening systems are equipped with a locking means. This locking means may be, for example, a spring-type spring leaf system which bears on the high voltage module of the lamp, preventing any unplanned disassembly. Such a system is described in the patent EP 1 065 438 . However, closing such a spring blade system requires additional movement on the part of the user, which further complicates the bulb change by the user. In addition, the actuation of such a leaf spring causes a relatively large clearance, inappropriate for a small environment such as that of a projector.

Le document FR 2 805 599 A1 décrit un dispositif selon le préambule de la revendication 1.The document FR 2 805 599 A1 describes a device according to the preamble of claim 1.

Exposé de l'inventionPresentation of the invention

L'invention a justement pour but de résoudre les inconvénients des techniques exposées précédemment en fournissant un système de fixation amélioré pour lampe D1 et lampe D2, et qui soit notamment non démontable et/ou plus simple à mettre en oeuvre. Ce système de fixation permet de maintenir et de verrouiller l'ampoule à décharge avec le porte lampe. Pour cela, l'invention utilise l'assemblage d'un anneau flexible inamovible sur le porte lampe du projecteur et d'une bague rigide mobile par rapport à l'anneau flexible.The object of the invention is precisely to overcome the disadvantages of the techniques described above by providing an improved fixing system for lamp D1 and lamp D2, and which is in particular non-removable and / or simpler to implement. This fastening system makes it possible to hold and lock the discharge bulb with the lamp holder. For this, the invention uses the assembly of an immovable flexible ring on the projector lamp holder and a rigid ring movable relative to the flexible ring.

Plus précisément, l'invention concerne un dispositif d'éclairage et/ou de signalisation, du type projecteur, pour véhicule automobile comportant :

  • une lampe à décharge, dite également lampe xénon,
  • une contrepartie comportant un réflecteur et un porte lampe assurant le maintien d'une ampoule de la lampe à décharge devant le réflecteur, et
  • un système de fixation de la lampe xénon sur la contrepartie.
More specifically, the invention relates to a lighting and / or signaling device, of the projector type, for a motor vehicle comprising:
  • a discharge lamp, also called a xenon lamp,
  • a counterpart comprising a reflector and a lamp holder for holding a bulb of the discharge lamp in front of the reflector, and
  • a system for fixing the xenon lamp on the counterpart.

Ce dispositif utilise un système de fixation comportant :

  • un anneau flexible placé entre le porte lampe et
  • une bague rigide apte à être montée, mobile en rotation, autour du porte lampe et de l'anneau flexible,
et est caractérisé en ce que le système de fixation comporte des moyens aptes à assurer une continuité électrique entre le boîtier conducteur de la lampe xénon enfermant le module haute tension et une zone conductrice de la contrepartie et ledit anneau flexible est d'une part monté à l'intérieur de la bague rigide et, d'autre part, fixé de façon à être inamovible sur le porte lampe au moyen d'au moins deux pattes de fixation aptes à s'emboîter dans des moyens d'attache du porte lampe, moyens d'attache formés par les protubérances. Cette continuité électrique est très utile pour lutter contre les interférences électromagnétiques crées par le fonctionnement de la lampe xénon. On obtient ainsi un blindage électromagnétique, sachant que, plus en « amont », on assure aussi la continuité électrique du boîtier conducteur du module haute tension de la lampe jusqu'au ballast, lui aussi généralement disposé dans un boîtier conducteur : la continuité électrique entre les deux boîtiers peut se faire par le câble d'alimentation blindé (par exemple à l'aide d'une gaine conductrice). L'invention permet ainsi d'assurer simultanément le montage mécanique de la lampe et de contribuer au blindage électromagnétique de celle-ci.This device uses a fixing system comprising:
  • a flexible ring placed between the lamp holder and
  • a rigid ring adapted to be mounted, movable in rotation, around the lamp holder and the flexible ring,
and is characterized in that the fixing system comprises means capable of ensuring electrical continuity between the conductive housing of the xenon lamp enclosing the high-voltage module and a conducting zone of the counterpart and said flexible ring is on the one hand mounted to the inside of the rigid ring and, secondly, fixed so as to be irremovable on the lamp holder by means of at least two fixing lugs adapted to fit into means of attachment of the lamp holder, means fasteners formed by the protuberances. This electrical continuity is very useful to fight against electromagnetic interference created by the operation of the xenon lamp. We thus obtaining an electromagnetic shielding, knowing that, more in "upstream", one also ensures the electrical continuity of the conductive box of the module high voltage from the lamp to the ballast, also generally arranged in a conductive housing: the electrical continuity between the two housings can be done by the shielded power cable (for example using a conductive sheath). The invention thus makes it possible simultaneously to assemble the lamp mechanically and to contribute to the electromagnetic shielding thereof.

L'invention peut comporter également une ou plusieurs des caractéristiques suivantes :

  • les moyens d'attache du porte lampe sont des harpons aptes à s'emboîter chacun dans une lunette d'une patte de fixation de l'anneau flexible.
  • la bague rigide comporte des ergots de verrouillage aptes à verrouiller le déplacement de la bague par rapport au porte lampe.
  • le porte lampe comporte, sur une surface externe, une couronne saillante guidant le déplacement des ergots de verrouillage de la bague rigide.
  • le porte lampe comporte, sur une surface externe, une couronne saillante assurant, de par sa conception, l'arrêt en rotation de la bague autour de l'axe de montage de ladite bague.
  • au moins une patte de fixation (de préférence chaque patte) comporte une extrémité libre chanfreinée, notamment masquée avant montage derrière les ergots de verrouillage de la bague rigide.
  • les ergots de verrouillage ont des tailles et des formes différentes formant un détrompeur.
  • l'anneau flexible comporte au moins un clip de positionnement et la bague rigide comporte au moins une cavité pour recevoir un clip.
  • la bague rigide est montée autour de l'anneau flexible de sorte que, une fois le système de fixation monté sur le porte lampe, les pattes de fixation de l'anneau flexible ne sont plus accessibles.
  • l'anneau flexible comporte des griffes de fixation aptes à maintenir la lampe à décharge dans une position verrouillée et la bague rigide comporte, sur une face intérieure, des cames aptes à pousser les griffes de fixation et à les maintenir dans la position verrouillée.
  • l'anneau flexible comporte des languettes de contact assurant un contact électrique entre la lampe à décharge et la contrepartie. C'est notamment une forme de réalisation des moyens aptes à assurer la continuité électrique entre la lampe (son boîtier conducteur renfermant le module haute tension, amovible ou non selon qu'il s'agit d'une lampe D1 ou d'une lampe D2) et la contrepartie à l'arrière du réflecteur.
  • l'anneau flexible est réalisé par découpe et pliage d'une plaque d'acier trempé.
  • l'anneau flexible comporte, à une extrémité de la plaque découpée, un crochet et, à une autre extrémité de la plaque découpée, une lunette pour recevoir le crochet.
The invention may also include one or more of the following features:
  • the fastening means of the lamp holder are harpoons adapted to fit each in a bezel of a bracket of the flexible ring.
  • the rigid ring has locking lugs adapted to lock the movement of the ring relative to the lamp holder.
  • the lamp holder comprises, on an outer surface, a projecting ring guiding the displacement of the locking lugs of the rigid ring.
  • the lamp holder comprises, on an outer surface, a projecting ring ensuring, by design, the rotational stop of the ring around the mounting axis of said ring.
  • at least one fixing lug (preferably each lug) has a chamfered free end, in particular hidden before mounting behind the locking lugs of the rigid ring.
  • the locking lugs have different sizes and shapes forming a key.
  • the flexible ring has at least one positioning clip and the rigid ring has at least one cavity for receiving a clip.
  • the rigid ring is mounted around the flexible ring so that, once the fastening system mounted on the lamp holder, the fixing lugs of the flexible ring are no longer accessible.
  • the flexible ring has fixing claws adapted to hold the discharge lamp in a locked position and the rigid ring has, on an inner face, cams adapted to push the fastening claws and to keep them in the locked position.
  • the flexible ring has contact tongues providing electrical contact between the discharge lamp and the counterpart. This is an embodiment of means capable of ensuring electrical continuity between the lamp (its conductive housing enclosing the high voltage module, removable or not depending on whether it is a D1 lamp or a D2 lamp ) and the counterpart at the back of the reflector.
  • the flexible ring is made by cutting and bending a hardened steel plate.
  • the flexible ring has, at one end of the cut plate, a hook and, at another end of the cut plate, a bezel for receiving the hook.

L'invention concerne également un véhicule automobile, qui comporte au moins un dispositif d'éclairage et/ou de signalisation décrit précédemment.The invention also relates to a motor vehicle, which comprises at least one lighting and / or signaling device described above.

Brève description des dessinsBrief description of the drawings

  • La figure 1 représente un système de fixation selon l'invention monté autour d'une lampe D2.The figure 1 represents a fastening system according to the invention mounted around a lamp D2.
  • La figure 2 représente un système de fixation selon l'invention monté autour d'une lampe D1.The figure 2 represents a fastening system according to the invention mounted around a lamp D1.
  • Les figures 3A et 3B représentent des exemples d'anneaux flexibles du système de l'invention.The Figures 3A and 3B are examples of flexible rings of the system of the invention.
  • La figure 4 représente un exemple de bague rigide du système de l'invention.The figure 4 represents an example of a rigid ring of the system of the invention.
  • La figure 5 représente un exemple de porte lampe sur lequel est monté un système de fixation selon l'invention.The figure 5 represents an example of lamp holder on which is mounted a fastening system according to the invention.
  • La figure 6 représente un exemple d'anneau flexible selon l'invention monté sur un porte lampe.The figure 6 represents an example of a flexible ring according to the invention mounted on a lamp holder.
Description détaillée de modes de réalisation de l'inventionDETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

La figure 1 représente un exemple de système de fixation selon l'invention monté autour d'une source lumineuse D2. Cette figure montre une lampe 1 montée sur une contrepartie 2 du projecteur par l'intermédiaire d'un système de fixation 3. La contrepartie 2 est la partie du projecteur comportant un réflecteur 21 et un porte lampe 22. Dans certains modes de réalisation du projecteur, le porte lampe 22 et le réflecteur 21 forment, ensemble, une seule et même pièce 2. Le porte lampe peut aussi ne pas partie intégrante du réflecteur 21 ; dans ce cas, il est fixé solidairement au réflecteur au moment du montage du projecteur.The figure 1 represents an example of a fastening system according to the invention mounted around a light source D2. This figure shows a lamp 1 mounted on a counterpart 2 of the projector by means of a fastening system 3. The counterpart 2 is the part of the projector comprising a reflector 21 and a lamp holder 22. In some embodiments of the projector , the lamp holder 22 and the reflector 21 together form a single piece 2. The lamp holder can also not integral part of the reflector 21; in this case, it is fixed integrally to the reflector at the time of mounting the projector.

Le porte lampe 22, par exemple de forme cylindrique, a pour rôle de supporter l'ampoule à décharge de la lampe 1. Il permet aussi de centrer et d'orienter l'ampoule à l'intérieur du réflecteur 21. Le système de fixation 3 de l'invention est monté autour de ce porte lampe 22.The lamp holder 22, for example of cylindrical shape, has the role of supporting the discharge bulb of the lamp 1. It also allows to center and orient the bulb inside the reflector 21. The fastening system 3 of the invention is mounted around this lamp holder 22.

Comme on l'aperçoit sur la figure 1, le système de fixation 3 comporte une bague rigide 4 et un anneau flexible 5 assemblés de façon à ce que la bague rigide soit mobile par rapport à l'anneau flexible. L'anneau flexible 5 comporte des languettes de contact 51 qui assurent un contact électrique avec le module haute tension de la lampe 1.As we see on the figure 1 , the fastening system 3 comprises a rigid ring 4 and a flexible ring 5 assembled so that the rigid ring is movable relative to the flexible ring. The flexible ring 5 has contact tongues 51 which provide electrical contact with the high voltage module of the lamp 1.

La figure 2 représente un système de fixation de l'invention monté autour d'une lampe D1. Cette figure 2 montre la contrepartie 2 du projecteur, avec le réflecteur 21 et le porte lampe 22, sur laquelle est monté le système de fixation 3 de l'invention et la lampe 6. Comme dans l'exemple de la figure 1, le système de fixation 3 comporte une bague rigide 4 et un anneau flexible 5 assemblés de façon à ce que la bague rigide soit mobile par rapport à l'anneau flexible. L'anneau flexible 5 comporte des languettes de contact, non visibles sur cette figure 2, qui assurent un contact électrique avec le module haute tension de la lampe 4.The figure 2 represents a fastening system of the invention mounted around a lamp D1. This figure 2 shows the counterpart 2 of the headlamp, with the reflector 21 and the lamp holder 22, on which is mounted the fixing system 3 of the invention and the lamp 6. As in the example of the figure 1 , the fastening system 3 comprises a rigid ring 4 and a flexible ring 5 assembled so that the rigid ring is movable relative to the flexible ring. The flexible ring 5 comprises contact tabs, not visible on this figure 2 , which provide electrical contact with the high voltage module of the lamp 4.

Le système de fixation 3 comporte une bague rigide représentée sur la figure 4 et un anneau flexible représenté sur les figures 3A et 3B. Quelle que soit la lampe montée dans le projecteur, une lampe D1 ou une lampe D2, la bague rigide est identique. Par contre, l'anneau flexible diffère selon qu'il s'agit d'une lampe D1 ou d'une lampe D2. Comme on le verra par la suite, cette différence concerne essentiellement les languettes de contact. Les caractéristiques de l'anneau flexible autres que les languettes de contact sont les mêmes pour un anneau de lampe D1 que pour un anneau de lampe D2.The fastening system 3 comprises a rigid ring represented on the figure 4 and a flexible ring shown on the Figures 3A and 3B . Regardless of the lamp mounted in the projector, a D1 lamp or a D2 lamp, the rigid ring is identical. On the other hand, the flexible ring differs according to whether it is a D1 lamp or a D2 lamp. As will be seen later, this difference essentially relates to the contact tabs. The characteristics of the flexible ring other than the contact tongues are the same for a lamp ring D1 as for a lamp ring D2.

Sur la figure 3A, on a représenté un exemple d'anneau flexible 5 pour lampe D1. Cet anneau flexible 5 est électriquement conducteur. Il est réalisé dans un matériau flexible et électriquement conducteur, comme un acier trempé. Il assure ainsi une fonction électrique, en même temps, par contact intérieur sur la contrepartie et par contact des languettes de contact sur le module haute tension de la lampe. Cet anneau flexible 5 a une forme sensiblement circulaire ; plus précisément, il a une forme circulaire lorsque le système de fixation est en position verrouillée ; il est circulaire par segments, ou secteurs, lorsque le système de fixation est en position déverrouillée. En d'autres termes, l'anneau flexible 5 a un écartement tangentiel plus grand en un point qu'en un autre point, c'est-à-dire plus grand en fin de segment qu'en début de segment.On the figure 3A an example of a flexible ring 5 for a lamp D1 is shown. This flexible ring 5 is electrically conductive. It is made of a flexible and electrically conductive material, such as hardened steel. It thus ensures an electrical function, at the same time, by internal contact on the counterpart and by contact of the contact tabs on the high voltage module of the lamp. This flexible ring 5 has a shape substantially circular; more specifically, it has a circular shape when the fastening system is in the locked position; it is circular in segments, or sectors, when the fastening system is in the unlocked position. In other words, the flexible ring 5 has a tangential spacing greater at one point than at another point, that is to say, greater at the end of the segment than at the beginning of the segment.

Cet anneau flexible 5 comporte une pluralité de languettes ou griffes, comme, par exemple, les languettes de maintien 51, dont le rôle est d'assurer le maintien provisoire axial entre la bague rigide et l'anneau flexible 5 et les griffes de fixation 52 qui assurent le verrouillage de la lampe dans le système de fixation. Ces languettes assurent le maintien de l'anneau flexible dans la bague, notamment lorsque le secteur saillant 42 de la bague est emboîté dans l'une des cavités de l'anneau flexible. Dans l'exemple de l'anneau de la figure 3A, les languettes de maintien 51 constituent aussi les languettes de contact du système de fixation, c'est-à-dire les languettes qui assurent la continuité électrique et le blindage électromagnétique entre le module haute tension et la contrepartie du projecteur.This flexible ring 5 comprises a plurality of tongues or claws, such as, for example, the holding tabs 51, whose role is to ensure the axial temporary retention between the rigid ring and the flexible ring 5 and the attachment claws 52 which lock the lamp in the fixing system. These tongues ensure the maintenance of the flexible ring in the ring, especially when the projecting sector 42 of the ring is fitted into one of the cavities of the flexible ring. In the example of the ring of the figure 3A , the holding tabs 51 also constitute the contact tabs of the fastening system, that is to say the tabs that provide electrical continuity and the electromagnetic shielding between the high voltage module and the counterpart of the projector.

Selon l'invention, cet anneau flexible 5 comporte au moins deux pattes de fixation 53 aptes à s'emboîter dans des moyens d'attache de la contrepartie. Ces pattes de fixation 53 sont situées à la base de l'anneau 5, c'est-à-dire sur la circonférence de l'anneau opposée aux languettes de contact 51. Elles comprennent chacune au moins une lunette 54, c'est-à-dire un orifice réalisé dans la patte de fixation, destinée à s'accrocher dans un harpon de la contrepartie. L'extrémité de chaque patte de fixation 53 peut comporter un chanfrein 55, à son extrémité libre, apte à entrer en butée contre des ergots de verrouillage de la bague rigide.According to the invention, this flexible ring 5 comprises at least two fixing lugs 53 able to fit into fastening means of the counterpart. These fixing lugs 53 are located at the base of the ring 5, that is to say on the circumference of the ring opposite to the contact tongues 51. They each comprise at least one bezel 54, that is, that is to say, an orifice made in the fixing lug, intended to hang in a harpoon of the counterpart. The end of each fixing lug 53 may comprise a chamfer 55, at its free end, adapted to abut against locking lugs of the rigid ring.

L'anneau flexible 5 comporte également un clip de positionnement 50 de l'anneau dans la bague rigide. Ce clip 50 est une languette pliée à son extrémité libre pour former un crochet. Ce clip 50 assure un positionnement angulaire de l'anneau flexible 5 par rapport à la bague rigide, avant l'assemblage de l'ensemble bague/anneau sur la contrepartie. Par une deuxième cavité dans la bague, le clip assure le positionnement de l'anneau après verrouillage de la lampe. Comme on la verra par la suite, ce clip 50 est destiné à se loger dans une cavité de la bague rigide.The flexible ring 5 also comprises a positioning clip 50 of the ring in the rigid ring. This clip 50 is a tab folded at its free end to form a hook. This clip 50 provides an angular positioning of the flexible ring 5 relative to the rigid ring, before assembling the ring / ring assembly on the counterpart. By a second cavity in the ring, the clip ensures the positioning of the ring after locking the lamp. As will be seen later, this clip 50 is intended to be housed in a cavity of the rigid ring.

L'anneau flexible 5 peut être réalisé par découpe et formage dans une plaque métallique. Cette plaque métallique peut être une plaque d'acier, traitée après découpe et formage. Chaque griffe, patte et autres languettes sont réalisées par découpe et pliage. La forme circulaire de l'anneau est obtenue par formage de la plaque découpée. La plaque découpée et formée est verrouillée, dans sa forme circulaire, par un système d'attache 58. Ce système d'attache 58 peut comporter un crochet 56 obtenu par formage d'une languette à une extrémité de la plaque métallique et une lunette 57 obtenue par découpage dans l'autre extrémité de ladite plaque métallique. Le crochet 56 est inséré dans la lunette 57 pour maintenir l'anneau fermé. Pour assurer un verrouillage de ce système d'attache, la lunette 57 peut comporter deux pointes dites « en sapin » qui garantissent une liaison non démontable.The flexible ring 5 can be made by cutting and forming in a metal plate. This metal plate may be a steel plate, treated after cutting and forming. Each claw, leg and other tabs are made by cutting and folding. The circular shape of the ring is obtained by forming the cut plate. The cut and shaped plate is latched, in its circular form, by a fastening system 58. This fastening system 58 may comprise a hook 56 obtained by forming a tongue at one end of the metal plate and a bezel 57 obtained by cutting in the other end of said metal plate. The hook 56 is inserted into the bezel 57 to keep the ring closed. To ensure a locking of this fastening system, the bezel 57 may comprise two tips called "fir" which ensure a non-removable connection.

La figure 3B représente un exemple d'anneau flexible pour lampe D2. Cet anneau flexible 5 comporte, comme expliqué précédemment, des languettes de maintien 51, des languettes de contact 59, des griffes de fixation 52, des pattes de fixation 53 avec chacune une lunette 54 et un chanfrein 55 et un clip de positionnement 50. Dans cet exemple d'anneau flexible, les languettes de contact 59 sont plus longues que les languettes de contact 51 de l'anneau pour lampe D1, car elles doivent assurer le contact électrique avec l'extérieur du connecteur du module haute tension de la lampe D2. Au contraire, dans le cas de la lampe D1, les languettes de contact assurent un contact électrique avec une zone métallique située sous le connecteur de la lampe D1. Dans cet exemple d'anneau flexible, les languettes de maintien 51 sont également plus longues que les languettes de maintien 51 de la figure 3A, car elles assurent aussi le rôle de languettes de contact avec le connecteur. Elles ont donc sensiblement la même forme que les languettes de contact 59 dans leur extrémité libre, mais elles sont découpées et pliées à leur base de façon à former un crochet pouvant recevoir un secteur saillant de la bague rigide et pouvant s'insérer dans un espace du pied d'ampoule de la lampe D2.The figure 3B represents an example of flexible ring for lamp D2. This flexible ring 5 comprises, as previously explained, holding tabs 51, contact tabs 59, fastening claws 52, fixing tabs 53 each with a bezel 54 and a bevel 55 and a positioning clip 50. this example of flexible ring, the contact tongues 59 are longer than the contact tabs 51 of the lamp ring D1, because they must ensure electrical contact with the outside of the connector of the high voltage module of the lamp D2 . On the contrary, in the case of the lamp D1, the contact tongues provide electrical contact with a metal zone located under the connector of the lamp D1. In this example of a flexible ring, the holding tabs 51 are also longer than the holding tabs 51 of the figure 3A because they also act as contact tabs with the connector. They therefore have substantially the same shape as the contact tabs 59 in their free end, but they are cut and folded at their base so as to form a hook that can receive a projecting sector of the rigid ring and can be inserted in a space from the bulb foot of the D2 lamp.

Comme représenté en figure 4, qu'il soit prévu pour une lampe D1 ou une lampe D2, l'anneau flexible 5 est monté dans une bague rigide 4. Cette bague rigide est réalisée dans un matériau non flexible comme du plastique ou de l'inox. Cette bague rigide 4 comporte des secteurs saillants 42, ou cames, en partie supérieure de la bague 4, c'est-à-dire sur la base de la bague située à proximité de la lampe. Ces secteurs saillants sont prévus pour s'ajuster dans les crochets formés par les languettes de maintien 51 de l'anneau flexible 5. Le positionnement de ces secteurs saillants 42 dans les languettes de maintiens 51 de l'anneau flexible 5 assure la tenue axiale de l'anneau flexible dans la bague lors de l'assemblage.As represented in figure 4 , whether it is provided for a lamp D1 or a lamp D2, the flexible ring 5 is mounted in a rigid ring 4. This rigid ring is made of a non-flexible material such as plastic or stainless steel. This rigid ring 4 has projecting sectors 42, or cams, in the upper part of the ring 4, that is to say on the base of the ring located near the lamp. These salient areas are planned to fit into the hooks formed by the holding tabs 51 of the flexible ring 5. The positioning of these projecting sectors 42 in the holding tabs 51 of the flexible ring 5 ensures the axial retention of the flexible ring in the ring during assembly.

La bague rigide 4 comporte aussi des secteurs de centrage 41 disposés sur la paroi interne de ladite bague et assurant un centrage de l'assemblage bague/anneau sur le porte lampe. Ces secteurs de centrage 41 sont situés dans une zone de la paroi interne de la bague qui, après assemblage avec l'anneau flexible, est recouvert par ledit anneau.The rigid ring 4 also comprises centering sectors 41 disposed on the inner wall of said ring and ensuring a centering of the ring / ring assembly on the lamp holder. These centering sectors 41 are located in an area of the inner wall of the ring which, after assembly with the flexible ring, is covered by said ring.

La bague rigide 4 comporte, de plus, au moins une cavité 43 destinée à recevoir le clip 50. Cette cavité 43 est formée dans l'épaisseur de la paroi de la bague. Elle a de préférence une forme en V adaptée pour recevoir le crochet du clip de positionnement 50 de l'anneau flexible 5. Ce clip en position dans la cavité 43 de la bague assure le positionnement angulaire de l'anneau par rapport à la bague lors de l'assemblage. Une deuxième cavité peut être présente (non représentée aux figures), pour assurer le positionnement de la bague après verrouillage de la lampe.The rigid ring 4 further comprises at least one cavity 43 intended to receive the clip 50. This cavity 43 is formed in the thickness of the wall of the ring. It preferably has a V shape adapted to receive the hook of the positioning clip 50 of the flexible ring 5. This clip in position in the cavity 43 of the ring ensures the angular positioning of the ring relative to the ring when assembly. A second cavity may be present (not shown in the figures), to ensure the positioning of the ring after locking the lamp.

La bague rigide 4 comporte aussi des ergots de verrouillage 44 qui assurent le verrouillage de la bague sur le porte lampe. Ces ergots 44 sont situés à la base de la bague 4, c'est-à-dire sur la partie inférieure de la paroi de la bague, en proéminence de cette paroi. Ces ergots 44 comportent chacun un dégagement 45, c'est-à-dire une zone centrale moins proéminente, qui permet l'engagement de la bague 4 sur le porte lampe, sans interférer avec les harpons 24 du porte lampe. Ces ergots 44 permettent d'orienter la bague sur le porte lampe. Ces ergots peuvent être de tailles et de formes différentes, assurant ainsi un rôle de détrompeur lors de l'assemblage sur le porte lampe.The rigid ring 4 also has locking lugs 44 which ensure the locking of the ring on the lamp holder. These lugs 44 are located at the base of the ring 4, that is to say on the lower part of the wall of the ring, in prominence of this wall. These lugs 44 each comprise a clearance 45, that is to say a central area less prominent, which allows the engagement of the ring 4 on the lamp holder, without interfering with harpoons 24 of the lamp holder. These lugs 44 allow to orient the ring on the lamp holder. These lugs can be of different sizes and shapes, thus providing a keying role during assembly on the lamp holder.

En position porte lampe déverrouillé, les pattes de fixation 53 de l'anneau flexible sont placées au-dessus de ces ergots de verrouillage 44.In unlocked lamp holder position, the fixing lugs 53 of the flexible ring are placed above these locking lugs 44.

Lorsque la bague 4 et l'anneau flexible 5 sont assemblés, formant ainsi un système de fixation 3 d'une lampe D1 ou D2, cet assemblage peut être monté sur le porte lampe du projecteur.When the ring 4 and the flexible ring 5 are assembled, thus forming a fixing system 3 of a lamp D1 or D2, this assembly can be mounted on the lamp holder of the projector.

Un exemple de contrepartie apte à recevoir le système de fixation 3 de l'invention est représenté sur la figure 5. Cette contrepartie 2 comporte un réflecteur 21 et un porte lampe 22. Est représenté l'axe XX' de montage de la bague 4. Ce porte lampe 22 a une forme cylindrique comportant une surface externe 23 équipée de différentes protubérances destinées à s'insérer dans la bague rigide 4 ou l'anneau flexible 5. Plus précisément, le porte lampe comporte, sur sa surface externe 23, des harpons 24 aptes à s'emboîter dans les lunettes 54 des pattes de fixation 53 de l'anneau flexible 5. Ces harpons peuvent être en biseau avec une partie évasée vers le bas, c'est-à-dire vers le réflecteur, de sorte que la liaison entre l'anneau et le porte lampe est indémontable par traction. Ces harpons 24, associés aux pattes de fixation 53 de l'anneau flexible, assurent ainsi l'accrochage dudit anneau 5 sur la contrepartie 2 ainsi que la tenue mécanique en traction de l'anneau 5 en position de verrouillage.An example of a counterpart capable of receiving the fastening system 3 of the invention is represented on the figure 5 . This counterpart 2 comprises a reflector 21 and a lamp holder 22. Is shown the axis XX 'of the assembly of the ring 4. This lamp holder 22 has a cylindrical shape having an external surface 23 equipped with different protuberances intended to fit into the rigid ring 4 or the flexible ring 5. More specifically, the lamp holder comprises, on its outer surface 23 , harpoons 24 adapted to fit into the glasses 54 of the fixing lugs 53 of the flexible ring 5. These harpoons can be beveled with a portion flared downwards, that is to say towards the reflector, so that the connection between the ring and the lamp holder is undetachable by traction. These harpoons 24, associated with the fixing lugs 53 of the flexible ring, thus ensure the attachment of said ring 5 to the counterpart 2 and the mechanical tensile strength of the ring 5 in the locking position.

Le porte lampe 22 comporte aussi une couronne saillante 25 circulaire, situées sur le contour extérieur dudit porte lampe. Cette couronne saillante 25 a pour rôle de guider le déplacement des ergots de verrouillage 44 de la bague 4. De préférence, cette couronne 25 a une section rectangulaire. La face inférieure 28 de cette couronne saillante assure une résistance des ergots à toutes les tractions selon la direction X, lorsque la bague est en position verrouillée. La face supérieure 29 de cette couronne limite la pénétration du porte lampe suivant la direction X', par l'intermédiaire des secteurs de centrage 41 de la bague rigide 4.The lamp holder 22 also has a circular projecting ring 25 located on the outer contour of said lamp holder. This projecting crown 25 serves to guide the displacement of the locking lugs 44 of the ring 4. Preferably, this ring 25 has a rectangular section. The lower face 28 of this projecting ring ensures a resistance of the pins to all the traction in the X direction, when the ring is in the locked position. The upper face 29 of this ring limits the penetration of the lamp holder in the direction X ', through the centering sectors 41 of the rigid ring 4.

La couronne saillante 25 comporte des dégagements 27 assurant le passage des ergots de verrouillage 44 de la bague 4. Les harpons 24 sont situés dans ces dégagements 27. Elle comporte aussi au moins une butée 26, réalisée dans sa face inférieure, limitant le déplacement des ergots de verrouillage 44 de la bague 4.The projecting crown 25 has clearances 27 ensuring the passage of the locking lugs 44 of the ring 4. The harpoons 24 are located in these clearances 27. It also comprises at least one stop 26, made in its lower face, limiting the movement of locking lugs 44 of the ring 4.

Sur la figure 6, on a représenté le porte lampe 22 sur lequel est monté l'anneau flexible 5. On comprend bien que cette figure est une vue explicative du montage anneau sur contrepartie et que cet assemblage n'a pas lieu d'être, dans la réalité, puisque l'anneau flexible 5 est monté dans la bague 4 avant d'être monté sur le porte lampe. Cette figure 6 montre un anneau flexible 5 pour lampe D2, avec ses languettes de contact 59, ses languettes de maintien 51, ses griffes de fixation 52 et son clip 50. Cette figure 6 montre également un porte lampe 22 avec sa couronne 25 et ses harpons 24. Comme on le voit sur cette figure, le harpon 24 du porte lampe 22 est inséré dans la lunette 54 de la patte de fixation 53 de l'anneau 5. L'anneau 5 est donc fixé sur le porte lampe 22 de manière inamovible. Le démontage de l'ensemble est rendu impossible dès lors que la bague 4 est en place autour de l'anneau 5, rendant les harpons 24 inaccessibles à l'utilisateur.On the figure 6 the lamp holder 22 is shown on which the flexible ring 5 is mounted. It is clearly understood that this figure is an explanatory view of the counter-ring assembly and that this assembly does not have to be, in reality, since the flexible ring 5 is mounted in the ring 4 before being mounted on the lamp holder. This figure 6 shows a flexible ring 5 for lamp D2, with its contact tabs 59, its holding tabs 51, its fixing claws 52 and its clip 50. figure 6 also shows a lamp holder 22 with its crown 25 and its harpoons 24. As seen in this figure, the harpoon 24 of the lamp holder 22 is inserted into the bezel 54 of the fixing lug 53 of the ring 5. The ring 5 is fixed on the lamp holder 22 irremovably. Disassembly of the assembly is made impossible when the ring 4 is in place around the ring 5, making the harpo 24 inaccessible to the user.

L'assemblage du système de fixation 3 sur le porte lampe 22 est réalisé de la façon suivante :

  • le système de fixation est positionné sur le porte lampe en plaçant les ergots de verrouillage 44 en face des dégagements 27 de la couronne 25 ;
  • une pression axiale est appliquée sur l'anneau métallique : les dégagements 45 des ergots 44 permettent à la bague 4 de s'engager sur le porte lampe 22 sans accrocher les harpons 24 ; les pattes de fixation 53 de l'anneau se déforment pour permettre d'insertion des harpons 24 ; une fois le sommet des harpons passé, les pattes de fixation se referment.
The assembly of the fastening system 3 on the lamp holder 22 is carried out as follows:
  • the fixing system is positioned on the lamp holder by placing the locking lugs 44 opposite the clearances 27 of the ring 25;
  • an axial pressure is applied on the metal ring: the clearances 45 of the lugs 44 allow the ring 4 to engage the lamp holder 22 without hooking harpoons 24; the fixing lugs 53 of the ring are deformed to allow insertion of harpoons 24; once the top of the harpoons passed, the brackets close again.

Comme on le comprend à la lecture de ce qui précède, l'anneau est immobile par rapport au porte lampe. Par contre, la bague rigide est mobile par rapport à l'anneau flexible 5 et, par conséquent, au porte lampe 22. Cette bague 4 est libre en rotation autour de l'anneau 5 dans la limite d'une valeur angulaire prédéfinie, fonction de la longueur d'un segment contenant des griffes de fixation 52 et une languette de maintien 51 et de l'emplacement de la cavité 43 sur la bague rigide. Lorsque le système de fixation est monté sur le porte lampe, seule la bague rigide peut être déplacée d'une position verrouillée vers une position déverrouillée, et inversement, pour permettre le remplacement de la lampe dans le projecteur. Le sens de verrouillage est prédéterminé par la butée 26 du porte lampe. Pour faciliter le déplacement de la bague rigide, par l'utilisateur, ladite bague peut comporter des pattes de préhension 46 situées sur la face extérieure de la bague.As understood from reading the above, the ring is stationary relative to the lamp holder. On the other hand, the rigid ring is mobile with respect to the flexible ring 5 and, consequently, to the lamp holder 22. This ring 4 is free to rotate around the ring 5 within the limit of a predefined angular value, depending on the length of a segment containing fixing claws 52 and a retaining tab 51 and the location of the cavity 43 on the rigid ring. When the fastening system is mounted on the lamp holder, only the rigid ring can be moved from a locked position to an unlocked position, and vice versa, to allow replacement of the lamp in the projector. The locking direction is predetermined by the stop 26 of the lamp holder. To facilitate the movement of the rigid ring, by the user, said ring may include gripping lugs 46 located on the outer face of the ring.

Lorsque la bague rigide est en position verrouillée, les ergots 44 de la bague sont passés derrière la couronne saillante 25 du porte lampe. La bague peut alors résister à toutes les contraintes mécaniques exercées sur la lampe ou le connecteur. Elle se solidarise avec le réflecteur.When the rigid ring is in the locked position, the lugs 44 of the ring are passed behind the projecting ring 25 of the lamp holder. The ring can then withstand all the mechanical stresses exerted on the lamp or the connector. It is solid with the reflector.

Claims (14)

  1. Lighting and/or signalling device, of the headlamp type, for motor vehicles comprising:
    - a discharge lamp or xenon lamp (1, 6),
    - a counterpart (2) comprising a reflector (21) and a lamp holder (22) providing the holding of a bulb of the lamp in front of the reflector, the lamp holder (22) comprising protuberances, and
    - a system (3) for fixing the lamp to the counterpart, comprising :
    - a flexible ring (5) placed between the lamp holder and
    - a rigid ring (4) capable of being mounted, movable in rotation, around the lamp holder (22) and the flexible ring (5),
    characterized in that the fixing system (3) comprises means capable of ensuring electrical continuity between the conductive housing of the lamp (1, 6) enclosing the high voltage module and a conductive zone of the counterpart (2) and said flexible ring (5) is, on the one hand, mounted inside the rigid ring (4) and, on the other hand, fixed in such a way as to be irremovable on the lamp holder (22) by means of at least two fixing brackets (53) capable of fitting into fastening means of the lamp holder (22), fastening means formed by the protuberances.
  2. Device according to claim 1, characterized in that the fastening means of the lamp holder (22) are harpoons (24) each capable of fitting into an aperture (54) of a fixing bracket (53) of the flexible ring (5).
  3. Device according to claim 1 or 2, characterized in that the rigid ring (4) has locking pins (44) capable of locking the movement of the rigid ring (4) with respect to the lamp holder (22) along the axis (XX') of mounting said ring.
  4. Device according to claim 3, characterized in that the lamp holder (22) has, on an outer surface (23), a projecting crown (25) guiding the movement of the locking pins (44) of the rigid ring.
  5. Device according to claim 3 or claim 4, characterized in that the lamp holder (22) has, on an external surface (23), a projecting crown (25) ensuring the rotation stop of the rigid ring (4) about the axis (XX') of mounting of the said ring.
  6. Device according to one of claims 3 to 5, characterized in that at least one fixing bracket (53) has a chamfered free end (55), in particular concealed before mounting behind the locking pins (44) of the rigid ring (4).
  7. Device according to any of claims 3 to 6, characterized in that the locking pins (44) have different sizes and shapes forming a coding.
  8. Device according to any of the previous claims, characterized in that the flexible ring (5) has at least one positioning clip (50) and the rigid ring (4) has at least one cavity (43) to receive said clip (50).
  9. Device according to any of the above claims, characterized in that the rigid ring (4) is mounted around the flexible ring (5) so that, once the fixing system (3) is mounted on the lamp holder (22), the fixing brackets (53) of the flexible ring (5) are no longer accessible.
  10. Device according to any of the above claims, characterized in that the flexible ring (5) has fixing claws (52) capable of holding the lamp (1, 6) in a locked position and in that the rigid ring (4) has, on an inner face, cams (42) capable of pushing the fixing claws (52) and holding them in the locked position.
  11. Device according to any of the above claims, characterized in that the flexible ring (5) has contact tabs (51, 59) ensuring electrical contact between the lamp (1, 6) and the counterpart (2).
  12. Device according to any of the above claims, characterized in that the flexible ring (5) has holding tabs (51) and in that the rigid ring has projecting sectors (42), the positioning of these projecting sectors (42) in the tabs (51) ensuring the axial retention of the flexible ring in the rigid ring (4) during assembly.
  13. Device according to any of the above claims, characterized in that the flexible ring (5) is made by cutting and bending a hardened steel plate.
  14. Device according to claim 13, characterized in that the flexible ring (5) has, at one end of the cut plate, a hook (56) and, at another end of the cut plate, an aperture (57) for receiving the hook.
EP06290019.6A 2005-01-07 2006-01-05 Device for fastening a lamp to a lampholder of a vehicle headlamp Active EP1679472B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0500197A FR2880674B1 (en) 2005-01-07 2005-01-07 SYSTEM FOR FIXING A LAMP ON A PROJECTOR LAMP DOOR FOR A MOTOR VEHICLE

Publications (3)

Publication Number Publication Date
EP1679472A2 EP1679472A2 (en) 2006-07-12
EP1679472A3 EP1679472A3 (en) 2013-07-31
EP1679472B1 true EP1679472B1 (en) 2019-12-11

Family

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Application Number Title Priority Date Filing Date
EP06290019.6A Active EP1679472B1 (en) 2005-01-07 2006-01-05 Device for fastening a lamp to a lampholder of a vehicle headlamp

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US (1) US7517124B2 (en)
EP (1) EP1679472B1 (en)
FR (1) FR2880674B1 (en)

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Also Published As

Publication number Publication date
US7517124B2 (en) 2009-04-14
EP1679472A2 (en) 2006-07-12
FR2880674B1 (en) 2007-03-16
US20060152940A1 (en) 2006-07-13
FR2880674A1 (en) 2006-07-14
EP1679472A3 (en) 2013-07-31

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