EP1108950B1 - Motor vehicle headlamp comprising improved bulb locking means - Google Patents

Motor vehicle headlamp comprising improved bulb locking means Download PDF

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Publication number
EP1108950B1
EP1108950B1 EP00403193A EP00403193A EP1108950B1 EP 1108950 B1 EP1108950 B1 EP 1108950B1 EP 00403193 A EP00403193 A EP 00403193A EP 00403193 A EP00403193 A EP 00403193A EP 1108950 B1 EP1108950 B1 EP 1108950B1
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EP
European Patent Office
Prior art keywords
ring
lamp
reflector
elastically deformable
rigid element
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EP00403193A
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German (de)
French (fr)
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EP1108950A1 (en
Inventor
Daniel Josquin
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Valeo Vision SAS
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Valeo Vision SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/194—Bayonet attachments

Definitions

  • the present invention relates to motor vehicle headlights.
  • the invention relates to a projector comprising improved means for fixing a lamp in a reflector of the projector.
  • the angular position of the lamp relative to the reflector is fixed by polarizing means, and the spring prevents the removal of the lamp.
  • a projector having the features of the preamble of claim 1 is known from DE-A-4123379.
  • the object of the invention is to make it possible to produce a motor vehicle headlamp comprising means for fixing a standard lamp such as those used in known manner with springs of locking, while greatly reducing the disadvantages associated with fasteners by locking springs.
  • the invention proposes a motor vehicle headlamp comprising a lamp mounted in a reflector and means for locking the position of the lamp in the reflector, characterized in that the locking means comprise an elastically-elastic element. deformable and a rigid element, the two elements being movable relative to each other in at least one degree of freedom and cooperating together during their relative movement relative to each other to deform the element elastically deformable and bring portions of this element into overlap of a portion of the lamp, so as to lock the position of the lamp relative to the reflector, and in that the elastically deformable element comprises fingers engaged in respective openings of the rigid element, said openings extending along median lines that do not correspond to arcs of a circle centered on the center of the rigid element, so that during a rotation of the elastically deformable element relative to the rigid element, the cooperation of each finger and the walls of the respective opening in which the finger is engaged causes deformation of the elastically deformable element.
  • Figures 1 and 2 show the structure of arrangements carried by the rear surface of a reflector wall 10 of a projector according to the invention
  • Figure 1 is a rear elevational view.
  • thermodur trademark of thermodur
  • FIGS. 4 to 6 show all or part of a ring 30 intended to be placed and held between the arrangements of the rear of the reflector and the cover 20.
  • This ring made of an elastically deformable material such as a flexible steel or a plastic material, has a circular geometry in the absence of any external constraint.
  • Figure 4 shows the ring in its so-called "unlocking" state (we will specify later in this text what lock is and how it is obtained).
  • the ring 30 is made in one piece, and comprises two fingers 31 and 32 salient perpendicularly out of the same surface of the ring (corresponding to the surface 300 facing the observer in Figure 4), the two fingers being diametrically opposed .
  • Figure 5 shows the geometry of the finger 31 in the particular example described here; however, the fingers may have a different geometry.
  • the outer radius of the ring 30 is constant, but its inner radius is not: the ring has indeed two sections 310 and 320 diametrically opposed and whose width between the outer edge of the section and its inner edge has a first value I, but also two other diametrically opposite sections 311 and 321, which join on both sides of the ring the sections 310 and 320, the width L sections 311 and 312 being greater than I, their inner radius being less than that of sections 310 and 320.
  • the fingers 31 and 32 are located in the middle regions of the respective sections 311 and 312.
  • Figure 6 shows the ring 30 when radial inward stress is applied to each finger 31, 32 (such stresses being represented by arrows). Under the effect of such opposing constraints, the ring deforms and takes an elliptical shape, the sections 311 and 312 then approaching. In this figure, there is shown in dashed lines the shape of the ring in the absence of any constraint.
  • FIGS. 4 and 6 represent the ring with two different angular positions with respect to a reference axis X linked to the casing 20. The meaning of these two angular positions will appear below.
  • FIGS. 7 and 8 show, seen from the rear, the means making it possible to lock according to the invention a standard type lamp "H7" engaged in the opening 11 of the wall of the reflector.
  • the cover 20 and the ring 30 have been assembled to cooperate together so as to selectively block the cup 41 of the lamp 40 so that any movement of the lamp rearward is prohibited.
  • Said cup is supported on the surface 12 of the wall of the reflector, via bosses. Since any movement of the lamp in a plane parallel to that of the cup is also prohibited by the cooperation of conventional tabs B of the lamp cup, with complementary arrangements of the reflector (said adjustments of the reflector being only partially shown in the figure by the notch 120 in the peripheral wall of the opening 11), the prohibition of movement of the lamp in a direction perpendicular to the plane of the cup 41 is equivalent to locking the lamp.
  • the ring 30 is engaged at the rear on the surface of the crown 13 of the arrangements of the reflector.
  • the ring is mounted on the ring 13 so as to surround the guides 131 and 132 with which the inner wall of the sections 310 and 320 of the ring cooperates to guide the ring in rotation about an axis coinciding with the axis of the lamp .
  • the cover 20 (only part of which is shown in Figure 7) was mounted behind the ring 30 so as to cover it from the rear, the fingers 31 and 32 of the ring being when mounting the bonnet engaged in the two respective openings of the cover (only the opening 211 being shown in Figure 7).
  • the groove portion 22 of the cover has then been fitted into the groove 14 of the reflector wall, so that the cover is fixed relative to the reflector and holds the ring 30.
  • the fingers 31 and 32 are not subjected to any radial force directed towards the center of the ring, so that the elastic ring returns to its shape. corresponding to the representation of Figure 4. Therefore, the sections 311 and 321 are also spaced so that they no longer cover the lamp cup, which can be removed from the reflector.
  • the invention is not limited to the particular embodiment shown above in which a fixed rigid element (Cover 20) cooperates with an elastically deformable and movable element (ring 30).
  • a fixed rigid element Cover 20
  • an elastically deformable and movable element ring 30
  • the rigid element corresponding here to the casing 20
  • the elastically deformable element a part of which partially covers the cup of the lamp to lock its position, the important thing being that during the movement relative to the rigid element, these two elements cooperate to deform the elastically deformable element so that certain parts thereof are at least partially cover the cup 41 of the lamp and lock, so its position in the reflector.
  • the relative movement of the elastically deformable element relative to the rigid element is a rotation about an axis coincident with that of the lamp as in the example described above. ; it is also possible to arrange these two elements so that they cooperate in any other degree of freedom (translation, translation-rotation, screwing, ).

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

Description

La présente invention concerne les projecteurs de véhicule automobile.The present invention relates to motor vehicle headlights.

Plus précisément, l'invention concerne un projecteur comprenant des moyens perfectionnés de fixation d'une lampe dans un réflecteur du projecteur.More specifically, the invention relates to a projector comprising improved means for fixing a lamp in a reflector of the projector.

On connaît principalement deux grandes familles de moyens pour fixer une lampe dans un réflecteur de projecteur :

  • d'une part, il est connu de prévoir directement sur la lampe des moyens d'accrochage pour coopérer avec des aménagements du réflecteur : c'est le cas des lampes à baïonnette, dont le culot porte des tiges destinées à être engagées dans des logements d'aménagements de la paroi du réflecteur.
    Cette solution permet une fixation efficace de la lampe dans le réflecteur. Toutefois, du fait qu'il existe plusieurs types de baïonnettes pour coopérer avec des aménagements spécifiques des réflecteurs, cette solution va à l'encontre de la standardisation des lampes, ce qui entraîne des inconvénients de coût et de complexité liés au grand nombre de références de lampes,
  • d'autre part, on connaît également des ressorts de verrouillage déformables qui présentent l'avantage de pouvoir être utilisés avec un très grand nombre de modèles de lampe.
Two major families of means are known for fixing a lamp in a projector reflector:
  • on the one hand, it is known to provide directly on the lamp hooking means to cooperate with adjustments of the reflector: this is the case of bayonet lamps, whose base carries rods intended to be engaged in housing adjustments of the reflector wall.
    This solution allows efficient attachment of the lamp in the reflector. However, because there are several types of bayonets to cooperate with specific arrangements of the reflectors, this solution goes against the standardization of the lamps, which entails cost and complexity disadvantages related to the large number of references. lamps,
  • on the other hand, deformable locking springs are also known which have the advantage that they can be used with a very large number of lamp models.

Dans ce cas, la position angulaire de la lampe par rapport au réflecteur est fixée par des moyens de détrompage, et le ressort empêche le retrait de la lampe.In this case, the angular position of the lamp relative to the reflector is fixed by polarizing means, and the spring prevents the removal of the lamp.

Mais ces ressorts, s'ils constituent une solution avantageuse en terme de standardisation du matériel, sont des pièces dont l'encombrement est important. De plus, la manipulation de ces ressorts s'avère parfois malaisée, en particulier lorsque le positionnement de la lampe dans le réflecteur la rend difficilement accessible à un opérateur.But these springs, if they are an advantageous solution in terms of hardware standardization, are parts whose size is important. In addition, the handling of these springs is sometimes difficult, especially when the positioning of the lamp in the reflector makes it difficult to access an operator.

Un projecteur comportant les caractéristiques du préambule de la revendication 1 est connu de DE-A-4123379.A projector having the features of the preamble of claim 1 is known from DE-A-4123379.

Le but de l'invention est de permettre de réaliser un projecteur de véhicule automobile comportant des moyens de fixation d'une lampe standard telles que celles utilisées de manière connue avec des ressorts de verrouillage, tout en réduisant considérablement les inconvénients associés aux fixations par ressorts de verrouillage.The object of the invention is to make it possible to produce a motor vehicle headlamp comprising means for fixing a standard lamp such as those used in known manner with springs of locking, while greatly reducing the disadvantages associated with fasteners by locking springs.

Afin d'atteindre ce but, l'invention propose un projecteur de véhicule automobile comprenant une lampe montée dans un réflecteur et des moyens de verrouillage de la position de la lampe dans le réflecteur, caractérisé en ce que les moyens de verrouillage comprennent un élément élastiquement déformable et un élément rigide, les deux éléments étant mobiles l'un par rapport à l'autre selon au moins un degré de liberté et coopérant ensemble lors de leur mouvement relatif l'un par rapport à l'autre pour déformer l'élément élastiquement déformable et amener des parties de cet élément en recouvrement d'une partie de la lampe, de manière à verrouiller la position de la lampe par rapport au réflecteur, et en ce que l'élément élastiquement déformable comprend des doigts engagés dans des ouvertures respectives de l'élément rigide, lesdites ouvertures s'étendant selon des lignes médianes qui ne correspondent pas à des arcs de cercle centrés sur le centre de l'élément rigide, de sorte que lors d'une rotation de l'élément élastiquement déformable par rapport à l'élément rigide, la coopération de chaque doigt et des parois de l'ouverture respective dans laquelle le doigt est engagé provoque la déformation de l'élément élastiquement déformable.In order to achieve this object, the invention proposes a motor vehicle headlamp comprising a lamp mounted in a reflector and means for locking the position of the lamp in the reflector, characterized in that the locking means comprise an elastically-elastic element. deformable and a rigid element, the two elements being movable relative to each other in at least one degree of freedom and cooperating together during their relative movement relative to each other to deform the element elastically deformable and bring portions of this element into overlap of a portion of the lamp, so as to lock the position of the lamp relative to the reflector, and in that the elastically deformable element comprises fingers engaged in respective openings of the rigid element, said openings extending along median lines that do not correspond to arcs of a circle centered on the center of the rigid element, so that during a rotation of the elastically deformable element relative to the rigid element, the cooperation of each finger and the walls of the respective opening in which the finger is engaged causes deformation of the elastically deformable element.

Des aspects préférés, mais non limitatifs du procédé selon l'invention sont les suivants :

  • les degrés de liberté de l'élément élastiquement déformable par rapport à l'élément rigide sont un degré de liberté unique.
  • le degré de liberté unique est une rotation autour d'un axe parallèle à l'axe de la lampe.
  • l'élément rigide est fixe par rapport au réflecteur, l'élément élastiquement déformable étant mobile par rapport au réflecteur.
  • l'élément élastiquement déformable est une bague sensiblement circulaire dont les doigts coopèrent avec des moyens correspondants de l'élément rigide de sorte qu'une rotation de la bague autour d'un axe parallèle à l'axe de la lampe entraîne une déformation de la bague, la rotation de la bague étant limitée entre deux positions d'extrémité correspondant respectivement à une position de verrouillage de la position de la lampe dans laquelle au moins une partie de la bague est en recouvrement d'une partie de la lampe et une position de déverrouillage de la lampe dans laquelle aucune partie de la bague ne recouvre la lampe.
  • les ouvertures de l'élément rigide sont configurées pour qu'une rotation de la bague dans un premier sens provoque un rapprochement de parties de la bague de sorte que lesdites parties de la bague viennent en recouvrement d'une coupelle de la lampe, et une rotation de la bague dans le sens opposé provoque un écartement desdites parties de la bague de sorte que celles-ci libèrent la coupelle.
  • les parties de la bague aptes à venir en recouvrement de la coupelle de la lampe sont des sections de bague de rayon interne diminué.
  • les doigts de la bague engagés dans des ouvertures de l'élément rigide dépassent hors de la surface de l'élément rigide, de manière à être accessibles à un opérateur pour que celui-ci puisse faire tourner la bague.
  • la rotation de la bague est guidée par la coopération de la bague avec des guides saillants hors de la paroi du réflecteur.
  • il est prévu des moyens de calage de la position de la bague par rapport à l'élément rigide dans chacune des deux positions de verrouillage et de déverrouillage de la lampe.
  • l'élément élastiquement déformable est fixe par rapport au réflecteur, l'élément rigide étant mobile par rapport au réflecteur.
Preferred, but not limiting, aspects of the process according to the invention are the following:
  • the degrees of freedom of the elastically deformable element relative to the rigid element are a single degree of freedom.
  • the unique degree of freedom is a rotation about an axis parallel to the axis of the lamp.
  • the rigid element is fixed relative to the reflector, the elastically deformable element being movable relative to the reflector.
  • the elastically deformable element is a substantially circular ring whose fingers cooperate with corresponding means of the rigid element so that a rotation of the ring about an axis parallel to the axis of the lamp causes deformation of the ring, the rotation of the ring being limited between two end positions respectively corresponding to a locking position of the lamp position in which at least a portion of the ring is in overlap of a part of the lamp and a position of unlocking the lamp in which no part of the ring covers the lamp.
  • the openings of the rigid element are configured so that a rotation of the ring in a first direction brings about a bringing together of parts of the ring so that said parts of the ring overlap with a cup of the lamp, and a rotation of the ring in the opposite direction causes a spacing of said parts of the ring so that they release the cup.
  • the parts of the ring adapted to overlap the lamp cup are ring sections of reduced internal radius.
  • the fingers of the ring engaged in openings of the rigid member protrude beyond the surface of the rigid member, so as to be accessible to an operator so that it can rotate the ring.
  • the rotation of the ring is guided by the cooperation of the ring with protruding guides out of the wall of the reflector.
  • there are provided means for setting the position of the ring relative to the rigid element in each of the two locking and unlocking positions of the lamp.
  • the elastically deformable element is fixed relative to the reflector, the rigid element being movable relative to the reflector.

D'autres aspects, buts et avantages de la présente invention apparaîtront mieux à la lecture de la description suivante d'une forme particulière de réalisation de l'invention faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue en élévation arrière des aménagements prévus sur l'arrière de la paroi d'un réflecteur de projecteur selon l'invention, autour d'une ouverture destinée à recevoir une lampe. Sur cette figure est défini le plan de section II-II,
  • la figure 2 est une section selon le plan II-II défini sur la figure 1,
  • la figure 3 est une vue en élévation d'un capot destiné à coopérer avec les aménagements des figures 1 et 2,
  • la figure 4 est une vue en élévation d'une bague déformable de verrouillage destinée à coopérer avec le capot et les aménagements évoqués plus haut la bague étant représentée, dans une position de déverrouillage dans laquelle elle n'est pas déformée. Sur cette figure est défini le plan de section V-V,
  • la figure 5 est une section selon le plan V-V défini sur la figure 4,
  • la figure 6 est une vue analogue à celle de la figure 4, montrant la bague dans une position de verrouillage dans laquelle la bague est déformée,
  • les figures 7 et 8 sont des vues correspondant respectivement aux figures 1 et 2, sur lesquelles on a représenté la bague et le capot montés sur les aménagements du réflecteur, afin de verrouiller la position d'une lampe.
Other aspects, objects and advantages of the present invention will appear better on reading the following description of a particular embodiment of the invention with reference to the appended drawings in which:
  • Figure 1 is a rear elevational view of the arrangements provided on the rear of the wall of a projector reflector according to the invention, around an opening for receiving a lamp. In this figure is defined the sectional plan II-II,
  • FIG. 2 is a section along the plane II-II defined in FIG. 1,
  • FIG. 3 is an elevational view of a cover intended to cooperate with the arrangements of FIGS. 1 and 2,
  • FIG. 4 is an elevational view of a deformable locking ring intended to cooperate with the cover and the arrangements mentioned above, the ring being shown, in a position of unlocking in which it is not deformed. In this figure is defined the section plane VV,
  • FIG. 5 is a section along the plane VV defined in FIG. 4,
  • FIG. 6 is a view similar to that of FIG. 4, showing the ring in a locking position in which the ring is deformed,
  • Figures 7 and 8 are views respectively corresponding to Figures 1 and 2, on which there is shown the ring and the hood mounted on the arrangements of the reflector, to lock the position of a lamp.

Les figures 1 et 2 représentent la structure d'aménagements portés par la surface arrière d'une paroi 10 de réflecteur d'un projecteur selon l'invention, la figure 1 étant une vue en élévation de derrière.Figures 1 and 2 show the structure of arrangements carried by the rear surface of a reflector wall 10 of a projector according to the invention, Figure 1 is a rear elevational view.

Autour d'une ouverture 11 prévue dans la paroi du réflecteur prévue pour permettre à un opérateur d'engager par l'arrière un bulbe de lampe (non représentée) à l'intérieur du réflecteur, on trouve les aménagements concentriques suivants, en partant du centre de l'ouverture :

  • entourant immédiatement l'ouverture 11, une surface 12 sur laquelle doit venir en appui une partie de montage (telle qu'une coupelle) d'une lampe, le diamètre de la coupelle étant supérieur à celui de l'ouverture 11, alors que le bulbe est engagé dans cette ouverture. La lampe (non représentée sur les figures 1 et 2 mais dont on expliquera la position en référence aux figures 7 et 8) peut être de tout type connu pouvant être utilisé avec un ressort de verrouillage, par exemple une lampe de type normalisé « H7 ». La surface d'appui 12 est adjacente à une encoche 120 classique de détrompage pour positionner correctement la lampe,
  • entourant cette surface d'appui 12, une couronne 13 est saillante vers l'arrière de manière à former un épaulement circulaire 130 (dont la hauteur h peut être de 0.4 à 0.6 millimètre par exemple). La surface plane de cette couronne porte deux guides 131 et 132 venus de matière, saillants vers l'arrière et diamétralement opposés par rapport au centre de l'ouverture 11,
  • une gorge 14 entoure la couronne 13, ladite gorge étant elle-même ceinte d'un rebord extérieur 15.
Around an opening 11 provided in the wall of the reflector provided to allow an operator to engage from the rear a lamp bulb (not shown) inside the reflector, we find the following concentric arrangements, starting from the center of the opening:
  • immediately surrounding the opening 11, a surface 12 on which is to bear a mounting part (such as a cup) of a lamp, the diameter of the cup being greater than that of the opening 11, while the bulb is engaged in this opening. The lamp (not shown in FIGS. 1 and 2 but whose position will be explained with reference to FIGS. 7 and 8) may be of any known type that can be used with a locking spring, for example a standard "H7" type lamp. . The bearing surface 12 is adjacent to a conventional keying notch 120 for correctly positioning the lamp,
  • surrounding this bearing surface 12, a ring 13 is projecting rearwardly so as to form a circular shoulder 130 (whose height h may be 0.4 to 0.6 millimeters for example). The flat surface of this crown carries two guides 131 and 132 integrally formed, protruding rearward and diametrically opposite with respect to the center of the opening 11,
  • a groove 14 surrounds the crown 13, said groove being itself encircled with an outer edge 15.

L'ensemble de ces aménagements est venu de matière avec le réflecteur, qui peut être réalisé en moulage d'une matière plastique telle que le thermodur (marque déposée).All these arrangements come from material with the reflector, which can be made by molding a plastic material such as thermodur (trademark).

La figure 3 représente un capot 20 en forme générale de couronne évidée en son centre. Le capot 20 est destiné à être engagé par l'arrière sur les aménagements décrits ci-dessus. Ce capot qui n'est pas déformable est réalisé d'une seule pièce dans une matière plastique rigide, et comporte :

  • une partie centrale 21 qui la forme d'une couronne plane s'étendant dans le plan de la figure 3, ladite partie comprenant deux ouvertures allongées 211 et 212 symétriques par rapport au centre géométrique O du capot. Chaque ouverture (211, 212) a une largeur sensiblement constante. On remarquera que l'ouverture 211 s'étend selon une ligne géométrique moyenne L qui ne correspond pas à un arc de cercle centré sur le point O, mais à une portion de spirale de sorte que, quand on décrit l'ouverture en tournant autour du point géométrique O, la distance à ce point varie. Le diamètre extérieur de la partie plane 21 est légèrement supérieur au diamètre extérieur de la couronne 13 des figures 1 et 2, qu'elle est destinée à recouvrir,
  • autour de cette partie plane 21, le capot 20 comprend une partie en gorge 22, dont les dimensions correspondent à celles de la gorge 14 des figures 1 et 2 de manière à ce que la partie en gorge 22 du capot puisse être engagée dans la gorge 14 des aménagements du réflecteur. Un rebord 23 borde l'extérieur de la gorge 22.
FIG. 3 represents a cover 20 in the general shape of a crown hollowed out at its center. The cover 20 is intended to be engaged from the rear on the arrangements described above. This cover which is not deformable is made of a single piece in a rigid plastic material, and comprises:
  • a central portion 21 which forms a planar ring extending in the plane of Figure 3, said portion comprising two elongated openings 211 and 212 symmetrical with respect to the geometric center O of the cover. Each opening (211, 212) has a substantially constant width. It will be noted that the opening 211 extends along a mean geometric line L that does not correspond to an arc centered on the point O, but to a spiral portion so that, when the opening is described by turning around it from the geometric point O, the distance at this point varies. The outer diameter of the flat portion 21 is slightly greater than the outer diameter of the ring 13 of FIGS. 1 and 2, which it is intended to cover,
  • around this flat portion 21, the cover 20 comprises a groove portion 22, whose dimensions correspond to those of the groove 14 of Figures 1 and 2 so that the groove portion 22 of the cover can be engaged in the groove 14 of the reflector arrangements. A flange 23 borders the outside of the groove 22.

Les figures 4 à 6 représentent tout ou partie d'une bague 30 destinée à être placée et maintenue entre les aménagements de l'arrière du réflecteur et le capot 20. Cette bague, réalisée dans une matière élastiquement déformable telle qu'un acier souple ou une matière plastique, a une géométrie circulaire en l'absence de toute contrainte extérieure.FIGS. 4 to 6 show all or part of a ring 30 intended to be placed and held between the arrangements of the rear of the reflector and the cover 20. This ring, made of an elastically deformable material such as a flexible steel or a plastic material, has a circular geometry in the absence of any external constraint.

La figure 4 représente la bague dans son état dit « de déverrouillage » (on va préciser plus loin dans ce texte à quoi correspond le verrouillage et comment on l'obtient).Figure 4 shows the ring in its so-called "unlocking" state (we will specify later in this text what lock is and how it is obtained).

La bague 30 est réalisée en une seule pièce, et comprend deux doigts 31 et 32 saillants perpendiculairement hors de la même surface de la bague (correspondant à la surface 300 tournée vers l'observateur sur la figure 4), les deux doigts étant diamétralement opposés. La figure 5 précise la géométrie du doigt 31 dans l'exemple particulier décrit ici ; toutefois les doigts peuvent avoir une géométrie différente.The ring 30 is made in one piece, and comprises two fingers 31 and 32 salient perpendicularly out of the same surface of the ring (corresponding to the surface 300 facing the observer in Figure 4), the two fingers being diametrically opposed . Figure 5 shows the geometry of the finger 31 in the particular example described here; however, the fingers may have a different geometry.

Le rayon extérieur de la bague 30 est constant, mais son rayon intérieur ne l'est pas : la bague possède en effet deux sections 310 et 320 diamétralement opposées et dont la largeur entre le bord extérieur de la section et son bord intérieur a une première valeur I, mais également deux autres sections 311 et 321 diamétralement opposés, qui joignent des deux côtés de la bague les sections 310 et 320, la largeur L des sections 311 et 312 étant supérieure à I, leur rayon intérieur étant inférieur à celui des sections 310 et 320. Les doigts 31 et 32 sont situés dans les zones médianes des sections respectives 311 et 312.The outer radius of the ring 30 is constant, but its inner radius is not: the ring has indeed two sections 310 and 320 diametrically opposed and whose width between the outer edge of the section and its inner edge has a first value I, but also two other diametrically opposite sections 311 and 321, which join on both sides of the ring the sections 310 and 320, the width L sections 311 and 312 being greater than I, their inner radius being less than that of sections 310 and 320. The fingers 31 and 32 are located in the middle regions of the respective sections 311 and 312.

La figure 6 représente la bague 30 lorsqu'on applique une contrainte radiale vers l'intérieur sur chaque doigt 31, 32 (de telles contraintes étant représentées par des flèches). Sous l'effet de telles contraintes opposées, la bague se déforme et prend une forme elliptique, les sections 311 et 312 se rapprochant alors. Sur cette figure, on a représenté en traits pointillés la forme de la bague en l'absence de toute contrainte.Figure 6 shows the ring 30 when radial inward stress is applied to each finger 31, 32 (such stresses being represented by arrows). Under the effect of such opposing constraints, the ring deforms and takes an elliptical shape, the sections 311 and 312 then approaching. In this figure, there is shown in dashed lines the shape of the ring in the absence of any constraint.

On remarquera que les figures 4 et 6 représentent la bague avec deux positions angulaires différentes par rapport à un axe de référence X lié au carter 20. La signification de ces deux positions angulaires va apparaître ci-après.It will be noted that FIGS. 4 and 6 represent the ring with two different angular positions with respect to a reference axis X linked to the casing 20. The meaning of these two angular positions will appear below.

En correspondance avec les figures 1 et 2, les figures 7 et 8 montrent, vus de l'arrière, les moyens permettant de verrouiller selon l'invention une lampe 40 de type normalisé « H7 » engagée dans l'ouverture 11 de la paroi du réflecteur.In correspondence with FIGS. 1 and 2, FIGS. 7 and 8 show, seen from the rear, the means making it possible to lock according to the invention a standard type lamp "H7" engaged in the opening 11 of the wall of the reflector.

Sur ces figures, le capot 20 et la bague 30 ont été assemblés pour coopérer ensemble de manière à pouvoir bloquer sélectivement la coupelle 41 de la lampe 40 de sorte que tout mouvement de la lampe vers l'arrière soit interdit. Ladite coupelle est en appui sur la surface 12 de la paroi du réflecteur, par l'intermédiaire de bossages. Etant donné que tout mouvement de la lampe dans un plan parallèle à celui de la coupelle est par ailleurs interdit par la coopération de pattes classiques B de la coupelle de la lampe, avec des aménagements complémentaires du réflecteur (lesdits aménagements du réflecteur n'étant que partiellement représentés sur la figure par l'encoche 120 dans la paroi périphérique de l'ouverture 11), l'interdiction des mouvements de la lampe selon une direction perpendiculaire au plan de la coupelle 41 équivaut au verrouillage de la lampe.In these figures, the cover 20 and the ring 30 have been assembled to cooperate together so as to selectively block the cup 41 of the lamp 40 so that any movement of the lamp rearward is prohibited. Said cup is supported on the surface 12 of the wall of the reflector, via bosses. Since any movement of the lamp in a plane parallel to that of the cup is also prohibited by the cooperation of conventional tabs B of the lamp cup, with complementary arrangements of the reflector (said adjustments of the reflector being only partially shown in the figure by the notch 120 in the peripheral wall of the opening 11), the prohibition of movement of the lamp in a direction perpendicular to the plane of the cup 41 is equivalent to locking the lamp.

Pour effectuer ce verrouillage sélectif de la coupelle - et donc de la lampe dont elle est rigidement solidaire, on utilise la coopération des aménagements de la paroi du réflecteur, de la bague 30 et du capot 20, ces différents éléments ayant initialement été montés ensemble de la manière suivante :To perform this selective locking of the cup - and therefore of the lamp of which it is rigidly secured, the cooperation of the arrangements of the wall of the reflector, the ring 30 and the cover 20 are used, these various elements having initially been mounted together with the following way:

Tout d'abord, on a engagé par l'arrière la bague 30 sur la surface de la couronne 13 des aménagements du réflecteur. La bague est montée sur la couronne 13 de manière à entourer les guides 131 et 132 avec lesquels la paroi intérieure des sections 310 et 320 de la bague coopère pour guider la bague en rotation autour d'un axe coïncidant avec l'axe de la lampe.First of all, the ring 30 is engaged at the rear on the surface of the crown 13 of the arrangements of the reflector. The ring is mounted on the ring 13 so as to surround the guides 131 and 132 with which the inner wall of the sections 310 and 320 of the ring cooperates to guide the ring in rotation about an axis coinciding with the axis of the lamp .

Le capot 20 (dont seule une partie est représentée sur la figure 7) a été monté en arrière de la bague 30 de manière à la recouvrir par l'arrière, les doigts 31 et 32 de la bague étant lors de ce montage du capot engagés dans les deux ouvertures respectives du capot (seule l'ouverture 211 étant représentée sur la figure 7).The cover 20 (only part of which is shown in Figure 7) was mounted behind the ring 30 so as to cover it from the rear, the fingers 31 and 32 of the ring being when mounting the bonnet engaged in the two respective openings of the cover (only the opening 211 being shown in Figure 7).

La partie en gorge 22 du capot a ensuite été emmanchée dans la gorge 14 de la paroi du réflecteur, de sorte que le capot est fixe par rapport au réflecteur et maintient la bague 30.The groove portion 22 of the cover has then been fitted into the groove 14 of the reflector wall, so that the cover is fixed relative to the reflector and holds the ring 30.

Une fois ce montage initial effectué :

  • la bague 30 est située dans l'espace recouvert par la partie 21 du capot. Les guides 131 et 132 maintiennent la bague centrée sur le milieu de l'ouverture du réflecteur, et le diamètre de la partie 21 du capot étant légèrement supérieur au diamètre extérieur de la bague, celle-ci peut se déformer sous l'action de contraintes radiales telles que celles évoquées plus haut,
  • et les doigts 31 et 32 sont engagés dans les ouvertures 211 et 212 du capot et ne peuvent se déplacer que selon la ligne médiane de leur ouverture associée, dont la largeur correspond à la largeur du doigt. En outre, ces doigts dépassent vers l'arrière hors des ouvertures du capot pour pouvoir être manipulés par un opérateur de la manière qui va être décrite ci-dessous.
Once this initial setup is done:
  • the ring 30 is located in the space covered by the portion 21 of the cover. The guides 131 and 132 keep the ring centered on the middle of the opening of the reflector, and the diameter of the portion 21 of the cap being slightly greater than the outer diameter of the ring, the latter may deform under the action of constraints. such as those mentioned above,
  • and the fingers 31 and 32 are engaged in the openings 211 and 212 of the hood and can move only along the center line of their associated opening, the width of which corresponds to the width of the finger. In addition, these fingers protrude rearward out of the hood openings to be manipulated by an operator in the manner to be described below.

Lorsque la bague est dans la position qui correspond à celle de la figure 7, la coopération de chaque doigt de la bague et des parois de l'ouverture du capot dans laquelle ce doigt est engagé provoque une déformation de la bague, de sorte que celle-ci est dans son état représenté sur la figure 6. Dans cette position « de verrouillage » de la bague, une partie de chaque section 311 et 321 recouvre partiellement la coupelle 41 de la lampe et interdit ainsi le retrait de la lampe vers l'arrière. Comme on l'a dit, la différence des diamètres de la partie 21 du capot et de la bague autorise la déformation de cette dernière.When the ring is in the position corresponding to that of Figure 7, the cooperation of each finger of the ring and the walls of the opening of the cover in which the finger is engaged causes a deformation of the ring, so that it is in its state in Figure 6. In this "locking" position of the ring, a portion of each section 311 and 321 partially covers the cup 41 of the lamp and thus prohibits the withdrawal of the lamp backwards. As has been said, the difference in diameters of the part 21 of the cover and the ring allows the deformation of the latter.

Si un opérateur fait alors tourner la bague dans le sens trigonométrique en manipulant les doigts 31 et 32 qui sont saillants à l'arrière du capot, la bague tourne également dans le sens trigonométrique et lors de cette rotation de la bague, l'opérateur ne peut déplacer chaque doigt que le long de l'ouverture dans laquelle le doigt est engagé ; ces ouvertures 211 et 212 guident ainsi les doigts et, au fur et à mesure de la rotation de la bague dans le sens trigonométrique, les doigts s'écartent du fait de la disposition des ouvertures, le matériau de la bague autorisant cette déformation.If an operator then rotates the ring in the trigonometric direction by manipulating the fingers 31 and 32 which protrude from the rear of the cover, the ring also rotates in the counterclockwise direction and during this rotation of the ring, the operator does not can move each finger as along the opening in which the finger is engaged; these openings 211 and 212 thus guide the fingers and, as and when the rotation of the ring in the trigonometric direction, the fingers deviate due to the arrangement of the openings, the material of the ring allowing this deformation.

Au terme de cette rotation dans le sens trigonométrique (défini par les extrémités des ouvertures 211 et 212), les doigts 31 et 32 ne sont soumis à aucune force radiale dirigée vers le centre de la bague, de sorte que la bague élastique retrouve sa forme correspondant à la représentation de la figure 4. Par conséquent, les sections 311 et 321 sont également écartées de sorte qu'elles ne recouvrent plus la coupelle de la lampe, qui peut être retirée du réflecteur.At the end of this rotation in the trigonometric direction (defined by the ends of the openings 211 and 212), the fingers 31 and 32 are not subjected to any radial force directed towards the center of the ring, so that the elastic ring returns to its shape. corresponding to the representation of Figure 4. Therefore, the sections 311 and 321 are also spaced so that they no longer cover the lamp cup, which can be removed from the reflector.

Il apparaît ainsi que la coopération du capot 20 fixe et rigide et de la bague 30 mobile par rapport au capot et élastiquement déformable permet d'effectuer un verrouillage sélectif de la lampe dans le réflecteur, de manière extrêmement simple. En effet, un opérateur peut effectuer facilement ce verrouillage sélectif d'une seule main, même si la lampe est implantée dans un endroit difficile d'accès.It thus appears that the cooperation of the fixed and rigid cover 20 and the ring 30 movable with respect to the cover and elastically deformable makes it possible to selectively lock the lamp in the reflector, in an extremely simple manner. Indeed, an operator can easily perform this selective locking with one hand, even if the lamp is located in a difficult to access location.

Il est également possible de prévoir des moyens de maintien de la position de la bague par rapport au capot dans ses deux positions verrouillée et déverrouillée, par exemple en prévoyant des bossages en deux endroits du capot, espacés angulairement et pouvant coopérer avec un creux complémentaire de la surface de la bague qui se trouve en face d'un, respectif, des deux bossages du capot dans chacune des deux positions respectives de verrouillage et de déverrouillage.It is also possible to provide means for maintaining the position of the ring relative to the cover in its two locked and unlocked positions, for example by providing bosses in two parts of the cover, angularly spaced and able to cooperate with a complementary hollow of the surface of the ring which is in front of a respective one of the two bosses of the cover in each of the respective two positions of locking and unlocking.

Bien entendu, l'invention n'est pas limitée à la forme de réalisation particulière représentée ci-dessus dans laquelle un élément rigide fixe (capot 20) coopère avec un élément élastiquement déformable et mobile (bague 30). Il est en particulier possible de prévoir un élément rigide mobile, alors que l'élément élastiquement déformable et venant recouvrir de manière sélective une partie de la coupelle de la lampe est fixe par rapport au réflecteur.Of course, the invention is not limited to the particular embodiment shown above in which a fixed rigid element (Cover 20) cooperates with an elastically deformable and movable element (ring 30). In particular it is possible to provide a movable rigid element, while the elastically deformable element selectively covering a portion of the lamp cup is fixed relative to the reflector.

Il est également possible d'agencer différemment l'élément rigide (correspondant ici au carter 20) et l'élément élastiquement déformable dont une partie vient partiellement recouvrir la coupelle de la lampe afin de verrouiller sa position, l'important étant que lors du mouvement relatif de l'élément élastiquement déformable par rapport à l'élément rigide, ces deux éléments coopèrent pour déformer l'élément élastiquement déformable afin que certaines parties de celui-ci viennent recouvrir au moins partiellement la coupelle 41 de la lampe et verrouiller, ainsi sa position dans le réflecteur.It is also possible to arrange differently the rigid element (corresponding here to the casing 20) and the elastically deformable element, a part of which partially covers the cup of the lamp to lock its position, the important thing being that during the movement relative to the rigid element, these two elements cooperate to deform the elastically deformable element so that certain parts thereof are at least partially cover the cup 41 of the lamp and lock, so its position in the reflector.

A cet égard, il n'est pas obligatoire que le mouvement relatif de l'élément élastiquement déformable par rapport à l'élément rigide soit une rotation autour d'un axe confondu avec celui de la lampe comme dans l'exemple décrit ci-dessus ; il est également possible d'agencer ces deux éléments de sorte qu'ils coopèrent selon tout autre degré de liberté (translation, translation-rotation, vissage, ...).In this regard, it is not mandatory that the relative movement of the elastically deformable element relative to the rigid element is a rotation about an axis coincident with that of the lamp as in the example described above. ; it is also possible to arrange these two elements so that they cooperate in any other degree of freedom (translation, translation-rotation, screwing, ...).

Claims (11)

  1. A motor vehicle headlight comprising a lamp (40) mounted in a reflector (10), together with means (20, 30, 12, 13, 14) for locking the position of the lamp in the reflector, the said locking means comprising an elastically deformable element (30) and a rigid element (20), the two elements being movable with respect to each other in at least one degree of freedom and cooperating together, during their relative movement with respect to each other, in such a way as to deform the elastically deformable element (30) and to bring portions (311, 321) of the said element into an overlying relationship with a portion (41) of the lamp, thereby locking the position of the lamp with respect to the reflector, characterised in that the elastically deformable element has fingers (31, 32) which are engaged in respective openings (211, 212) in the rigid element, the said openings extending along median lines which do not correspond to circular arcs centred on the centre of the rigid element, whereby, during a rotational movement of the elastically deformable element with respect to the rigid element, the cooperation of each finger with walls of the respective opening in which the finger is engaged causes the elastically deformable element to deform.
  2. A headlight according to Claim 1, characterised in that the degrees of freedom of the elastically deformable element (30) with respect to the rigid element (20) consist of a single degree of freedom.
  3. A headlight according to Claim 2, characterised in that the single degree of freedom consists of rotation about an axis parallel to the axis of the lamp.
  4. A headlight according to one of the preceding Claims, characterised in that the rigid element (20) is fixed with respect to the reflector (10), the elastically deformable element (30) being movable with respect to the reflector.
  5. A headlight according to Claim 4, characterised in that the elastically deformable element (30) is a substantially circular ring, the fingers (31, 32) of which are in cooperation with corresponding means (211, 212) of the rigid element, in such a way that a rotational movement of the ring about an axis parallel to the axis of the lamp causes the ring to be deformed, the rotation of the ring being limited between two end positions which correspond, respectively, to a position in which the position of the lamp is locked and in which at least one portion (311, 321) of the ring is in overlying relationship with a portion (41) of the lamp, and a position in which the lamp is unlocked, and in which no portion of the ring overlies the lamp.
  6. A headlight according to Claim 5, characterised in that the apertures (211, 212) of the rigid element are so configured that a rotational movement of the ring in a first direction causes portions of the ring (311, 321) to move closer together, in such a way that the said portions of the ring come into overlying relationship with a flanged cup piece (41) of the lamp, and a rotational movement of the ring in the opposite direction causes the said portions of the ring to move away from each other, so as to cause these latter to release the flanged cup piece.
  7. A headlight according to Claim 6, characterised in that the portions of the sleeve which are adapted to come into overlying relationship with the flanged cup piece are ring sections (311, 321) of reduced internal radius.
  8. A headlight according to Claim 6 or Claim 7, characterised in that the ringers of the ring which are engaged in openings in the rigid element extend beyond the surface of the rigid element, so as to be accessible to an operator so that the latter is able to rotate the ring.
  9. A headlight according to one of Claims 5 to 8, characterised in that the rotational movement of the ring is guided by the cooperation of the ring with guides (131, 132) which project out the wall (10) of the reflector.
  10. A headlight according to one of Claims 5 to 9, characterised in that means are provided for locating the position of the ring (30) with respect to the rigid element (20) in each of the two positions, namely the locking position and the unlocking position of the lamp.
  11. A headlight according to one of Claims 1 to 3, characterised in that the elastically deformable element (30) is fixed with respect to the reflector (10), the rigid element (20) being movable with respect to the reflector.
EP00403193A 1999-12-15 2000-11-16 Motor vehicle headlamp comprising improved bulb locking means Expired - Lifetime EP1108950B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9915811A FR2802614B1 (en) 1999-12-15 1999-12-15 MOTOR VEHICLE PROJECTOR COMPRISING IMPROVED LAMP LOCKING MEANS
FR9915811 1999-12-15

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EP1108950A1 EP1108950A1 (en) 2001-06-20
EP1108950B1 true EP1108950B1 (en) 2006-11-29

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EP00403193A Expired - Lifetime EP1108950B1 (en) 1999-12-15 2000-11-16 Motor vehicle headlamp comprising improved bulb locking means

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EP (1) EP1108950B1 (en)
DE (1) DE60032104T2 (en)
ES (1) ES2276667T3 (en)
FR (1) FR2802614B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007022028B4 (en) * 2007-05-11 2016-10-20 Automotive Lighting Reutlingen Gmbh Lighting device for a vehicle, in particular motor vehicle headlights
CN101900284B (en) * 2009-05-27 2012-08-29 市光工业株式会社 Vehicle lamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1529782A (en) * 1967-05-08 1968-06-21 Sev Marchal Improvements to headlamps such as those in motor vehicles
DE4123379A1 (en) * 1991-07-15 1993-01-21 Bosch Gmbh Robert Bulb fixture vehicle headlamp reflector - has axially projecting crown with rotatable fixing ring cooperating with bulb socket plate
DE4436409C1 (en) * 1994-10-12 1995-12-07 Hella Kg Hueck & Co Bulb holder for reflector of vehicle headlamp

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ES2276667T3 (en) 2007-07-01
FR2802614A1 (en) 2001-06-22
DE60032104D1 (en) 2007-01-11
EP1108950A1 (en) 2001-06-20
DE60032104T2 (en) 2007-06-28
FR2802614B1 (en) 2002-05-24

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