EP3857120B1 - Light guide for a vehicle lighting device - Google Patents

Light guide for a vehicle lighting device Download PDF

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Publication number
EP3857120B1
EP3857120B1 EP19794591.8A EP19794591A EP3857120B1 EP 3857120 B1 EP3857120 B1 EP 3857120B1 EP 19794591 A EP19794591 A EP 19794591A EP 3857120 B1 EP3857120 B1 EP 3857120B1
Authority
EP
European Patent Office
Prior art keywords
guide portion
guide
light
freedom
optical path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19794591.8A
Other languages
German (de)
French (fr)
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EP3857120A1 (en
Inventor
Rodolphe Peron
Guillaume Royer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stellantis Auto SAS
Original Assignee
PSA Automobiles SA
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Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3857120A1 publication Critical patent/EP3857120A1/en
Application granted granted Critical
Publication of EP3857120B1 publication Critical patent/EP3857120B1/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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]

Definitions

  • the present invention generally relates to a light guide forming part of a light signaling device of a motor vehicle, such a light guide typically comprising a light source and a guide portion of transparent material, to guide light towards an exit surface visible from the environment outside the vehicle.
  • Light guides are known in the prior art with several distinct light guide portions cooperating with a light guide or a main guide portion, as shown in the document EP3118060A1 , but this document does not provide any solution for fixing all these guide portions, and this results in a manufacturing complexity to hold all these components together.
  • a modification of the shape of the main light guide then entails a redefinition of the whole assembly, which then increases the design and tooling costs.
  • EP 3 67 618 A1 discloses a light guide of a signaling device known from the prior art.
  • An object of the present invention is to respond to the drawbacks of the prior art mentioned above and in particular, first of all, to propose a light guide which offers a simple fixing solution and which allows adaptations of design or design, without requiring long and costly development operations.
  • the light guide according to the implementation above comprises positioning and locking means integrally formed in the first or second guide portion (the guide portions are separate and independent parts), so that it does not there is no need to provide external fixing, which simplifies the overall system.
  • these guide portions are made by molding a transparent plastic material. This is for example PMMA (poly(methyl methacrylate)) with a refractive index of 1.49 or polycarbonate with a refractive index of 1.59, and the integration of these positioning and locking means is easy, by simple design of the manufacturing mould.
  • these two guide portions which integrate their own coupling means between them (made of the same material), provide an integrated fixing solution.
  • the positioning means are arranged to block at least five degrees of freedom between the first guide portion and the second guide portion. Even more advantageously, the positioning means are arranged to block six degrees of freedom between the first guide portion and the second guide portion, so as to immobilize the two guide portions together.
  • the positioning means comprise a plurality of support pads arranged on an output surface of the first optical path or on an input surface of the second optical path, and arranged to bear respectively on the input surface of the second optical path or on the output surface of the first optical path, so as to block at least a first degree of freedom in translation along a first direction.
  • Such support pads can for example block a translation in X, and also one or two rotations along an axis perpendicular to this direction.
  • the positioning means are arranged to block at least five degrees of freedom between the first exit surface and the second entry surface.
  • the positioning means comprise a plurality of bearing studs arranged on one of the first exit surface or the second entry surface, and arranged to rest on the other of the first exit surface or of the second entry surface, so as to block at least a first degree of freedom in translation in a first direction.
  • Such support pads can for example block a translation in X, and also one or two rotations along an axis perpendicular to this direction.
  • the positioning means comprise a plurality of hooks arranged on one of the first guide portion or the second guide portion, so as to mate with the other of the first guide portion or the second guide portion, so as to lock the first degree of freedom in the second direction, and to block at least a second degree of freedom in translation.
  • the second degree of freedom is typically along the Y direction.
  • the positioning means and the locking means comprise at least one flexible lug arranged on one of the first guide portion or the second guide portion, so as to mate with the other of the first portion guide or the second guide portion, so as to block at least a third degree of freedom in translation and to lock the first guide portion on the second guide portion.
  • the third degree of freedom is typically in the direction Z. It is possible to envisage engagement or coupling by elastic interlocking, otherwise called clipping or clipping.
  • the first guide portion and/or the second guide portion are thin and/or planar guide portions.
  • the guide portions have a cross section (typically perpendicular to the optical path, i.e. the path of light) which has a width that is significantly less than its length, and the total optical path has a length also significantly greater than the width of the cross section.
  • said at least one light source is fixed to the first guide portion.
  • the light guide comprises two light sources, each arranged to emit specific signaling light.
  • a third aspect of the invention relates to a motor vehicle, comprising at least one light guide according to the first aspect of the invention.
  • the figure 1 presents a light guide according to the present invention, comprising a first guide portion 10 coupled to a second guide portion 20.
  • the first guide portion 10 defines a first optical path which is upstream (c that is to say close to the light source), and the second guide portion 20 forms a second optical path which is downstream (that is to say that the first guide portion 10 is located between the source of light and the second guide portion 20).
  • this is the second serving guide 20 and in particular its exit surface which will be visible to the customer.
  • the guide light comprises a first guide portion 10 standard usable on several vehicle models and a second guide portion 20 whose output is specific to a given vehicle.
  • the picture 2 represents a rear view of the first guide portion 10 which embeds the light sources, which are here one or more light-emitting diodes (LEDs or LEDs) mounted on an electronic circuit 40.
  • the light sources which are here one or more light-emitting diodes (LEDs or LEDs) mounted on an electronic circuit 40.
  • the invention also proposes an integrated fixing solution for securing the first guide portion 10 and the second guide portion 20, as shown by the figures 3 and 4 .
  • studs 31 are formed on an entry surface 20e of the second guide portion 20, which bear against an exit surface 10s of the first guide portion 10. These studs 31 therefore form part of means of positioning, and which block a first degree of freedom, here a translation along an X axis of the vehicle.
  • the figure 5 shows in close-up these plots 31.
  • the positioning means also comprise hooks 32b formed on the entry surface 20e of the second guide portion 20 (visible figure 4 ), which are housed in openings 32a formed in the exit surface 10s of the first guide portion 10. These hooks 32b and openings 32a are part of the positioning means, and then block a second degree of freedom, here a translation along a Y axis of the vehicle.
  • the figures 6 and 7 show in close-up and from two different angles the assembled parts, with the hooks 32b engaged in the openings 32a.
  • a flexible tab 33a is provided on the first guide portion 10, to cooperate with a catch 33b of the second guide portion, to block the last degree of freedom in translation (in the direction Z), and also to s Engage after deformation and elastic return on the cleat 33b (by clipping or clipping or elastic interlocking), so as to also form locking means, in addition to being part of the positioning means.
  • the figure 8 shows a close-up of flexible tab 32a engaged with cleat 33b.
  • the studs 31, the openings 32a, the hooks 32b, the flexible tab 33a and the cleat 33b form means for positioning the first guide portion 10 on the second guide portion 20 and are integrated on these parts (made for example in a single block by injection/moulding in a single material). Part of these positioning means also form locking means, so that the first guide portion 10 is firmly fixed to the second guide portion 20 to form the light guide according to the invention.
  • the figure 9 represents two alternative embodiments of the light guide according to the invention which is coupled to two types of light sources 41 and 42.
  • the light sources 41 and 42 are stacked or offset along a direction normal to this view, fixed on a printed circuit 43, and facing a single input surface of the first portion guide 10, which is coupled with the positioning and locking means with the second guide portion 20.
  • the light sources 41 and 42 are separated, so that the first guide portion 10' has two entry surfaces, and a single exit surface, which faces the entry surface of the second guide portion 20'.
  • the interfaces (positioning means and locking means) between the first guide portion 10 or 10' and the second guide portion 20 or 20' are identical, and always integrated directly into the body of these parts, which are then of easy to manufacture and assemble.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Description

La présente invention concerne de manière générale un guide de lumière faisant partie d'un dispositif de signalisation lumineuse d'un véhicule automobile, un tel guide de lumière comprenant typiquement une source de lumière et une portion de guidage en matière transparente, pour guider de la lumière vers une surface de sortie visible depuis l'environnement extérieur du véhicule.The present invention generally relates to a light guide forming part of a light signaling device of a motor vehicle, such a light guide typically comprising a light source and a guide portion of transparent material, to guide light towards an exit surface visible from the environment outside the vehicle.

Il est connu dans l'art antérieur des guides de lumières avec plusieurs portions de guidage de lumière distinctes coopérant avec un guide de lumière ou une portion de guidage principale, comme le montre le document EP3118060A1 , mais ce document ne donne aucune solution de fixation de toutes ces portions de guidage, et il en résulte une complexité de fabrication pour maintenir ensembles tous ces composants. De plus, une modification de la forme du guide de lumière principal entraîne alors une redéfinition de tout l'ensemble, ce qui augmente alors les coûts de conception et d'outillage. EP 3 67 618 A1 divulgue un guide de lumière d'un dispositif de signalisation connu de l'art antérieur.Light guides are known in the prior art with several distinct light guide portions cooperating with a light guide or a main guide portion, as shown in the document EP3118060A1 , but this document does not provide any solution for fixing all these guide portions, and this results in a manufacturing complexity to hold all these components together. In addition, a modification of the shape of the main light guide then entails a redefinition of the whole assembly, which then increases the design and tooling costs. EP 3 67 618 A1 discloses a light guide of a signaling device known from the prior art.

Un but de la présente invention est de répondre aux inconvénients de l'art antérieur mentionnés ci-dessus et en particulier, tout d'abord, de proposer un guide de lumière qui propose une solution de fixation simple et qui permette des adaptations de design ou de conception, sans pour autant requérir de longues et couteuses opérations de développement.An object of the present invention is to respond to the drawbacks of the prior art mentioned above and in particular, first of all, to propose a light guide which offers a simple fixing solution and which allows adaptations of design or design, without requiring long and costly development operations.

Pour cela un premier aspect de l'invention concerne un guide de lumière d'un dispositif de signalisation lumineuse de véhicule comprenant au moins une source de lumière agencée pour émettre au moins une lumière de signalisation, le guide de lumière comprenant :

  • une première portion de guidage définissant un premier chemin optique,
  • une deuxième portion de guidage définissant un deuxième chemin optique, à la suite du premier chemin optique,
caractérisé en ce que la première portion de guidage et/ou la deuxième portion de guidage est intégralement formée avec :
  • des moyens de positionnement agencés pour bloquer au moins trois degrés de liberté entre la première portion de guidage et la deuxième portion de guidage,
  • des moyens de verrouillage comprenant au moins une portion flexible, agencés pour verrouiller le blocage desdits degrés de liberté, par déformation élastique de ladite au moins une portion flexible.
For this, a first aspect of the invention relates to a light guide of a vehicle light-signalling device comprising at least one light source arranged to emit at least one signaling light, the light guide comprising:
  • a first guide portion defining a first optical path,
  • a second guide portion defining a second optical path, following the first optical path,
characterized in that the first guide portion and/or the second guide portion is integrally formed with:
  • positioning means arranged to block at least three degrees of freedom between the first guide portion and the second guide portion,
  • locking means comprising at least one flexible portion, arranged to lock the blocking of said degrees of freedom, by elastic deformation of said at least one flexible portion.

Le guide de lumière selon la mise en œuvre ci-dessus comprend de moyens de positionnement et de verrouillage intégralement formés dans la première ou deuxième portion de guidage (les portions de guidage sont des pièces distinctes et indépendantes), si bien qu'il n'y a pas besoin de prévoir de fixation externe, ce qui simplifie le système global. Typiquement, ces portions de guidages sont réalisées par moulage d'une matière plastique transparente. Il s'agit par exemple de PMMA (poly(méthacrylate de méthyle)) d'indice de réfraction de 1,49 ou de polycarbonate d'indice de réfraction de 1,59, et l'intégration de ces moyens de positionnement et de verrouillage est aisé, par simple conception du moule de fabrication. En d'autres termes, ces deux portions de guidage qui intègrent leurs propres moyens d'accouplement entre elles (réalisés dans la même matière), procurent une solution de fixation intégrée.The light guide according to the implementation above comprises positioning and locking means integrally formed in the first or second guide portion (the guide portions are separate and independent parts), so that it does not there is no need to provide external fixing, which simplifies the overall system. Typically, these guide portions are made by molding a transparent plastic material. This is for example PMMA (poly(methyl methacrylate)) with a refractive index of 1.49 or polycarbonate with a refractive index of 1.59, and the integration of these positioning and locking means is easy, by simple design of the manufacturing mould. In other words, these two guide portions which integrate their own coupling means between them (made of the same material), provide an integrated fixing solution.

Avantageusement, les moyens de positionnement sont agencés pour bloquer au moins cinq degrés de liberté entre la première portion de guidage et la deuxième portion de guidage. Encore plus avantageusement, les moyens de positionnement sont agencés pour bloquer six degrés de liberté entre la première portion de guidage et la deuxième portion de guidage, de sorte à immobiliser les deux portions de guidage entre elles.Advantageously, the positioning means are arranged to block at least five degrees of freedom between the first guide portion and the second guide portion. Even more advantageously, the positioning means are arranged to block six degrees of freedom between the first guide portion and the second guide portion, so as to immobilize the two guide portions together.

Avantageusement, les moyens de positionnement comprennent une pluralité de plots d'appui agencés sur une surface de sortie du premier chemin optique ou sur une surface d'entrée du deuxième chemin optique, et agencés pour prendre appui respectivement sur la surface d'entrée du deuxième chemin optique ou sur la surface de sortie du premier chemin optique, de sorte à bloquer au moins un premier degré de liberté en translation selon une première direction. De tels plots d'appuis peuvent par exemple bloquer une translation en X, et aussi une ou deux rotations selon un axe perpendiculaire à cette direction.Advantageously, the positioning means comprise a plurality of support pads arranged on an output surface of the first optical path or on an input surface of the second optical path, and arranged to bear respectively on the input surface of the second optical path or on the output surface of the first optical path, so as to block at least a first degree of freedom in translation along a first direction. Such support pads can for example block a translation in X, and also one or two rotations along an axis perpendicular to this direction.

En d'autres termes et selon un mode de réalisation particulier, l'invention concerne un guide de lumière d'un dispositif de signalisation lumineuse de véhicule comprenant au moins une source de lumière agencée pour émettre au moins une lumière de signalisation, le guide de lumière comprenant :

  • une première portion de guidage comprenant :
    • une première surface d'entrée agencée pour capter et diriger la lumière émise par la source de lumière vers un premier chemin optique de la première portion de guidage
    • une première surface de sortie, agencée en sortie du premier chemin optique de la première portion de guidage
  • une deuxième portion de guidage comprenant :
    • une deuxième surface d'entrée agencée pour capter et diriger la lumière émise par la première surface de sortie vers un deuxième chemin optique de la deuxième portion de guidage
    • une deuxième surface de sortie, agencée en sortie du deuxième chemin optique de la deuxième portion de guidage
caractérisé en ce que la première portion de guidage et/ou la deuxième portion de guidage est intégralement formée avec :
  • des moyens de positionnement agencés pour bloquer au moins trois degrés de liberté entre la première surface de sortie et la deuxième surface d'entrée,
  • des moyens de verrouillage comprenant au moins une portion flexible, agencés pour verrouiller le blocage desdits degrés de liberté, par déformation élastique de ladite au moins une portion flexible.
In other words and according to a particular embodiment, the invention relates to a light guide of a vehicle light-signalling device comprising at least one light source arranged to emit at least one signaling light, the light including:
  • a first guide portion comprising:
    • a first input surface arranged to capture and direct the light emitted by the light source towards a first optical path of the first guide portion
    • a first output surface, arranged at the output of the first optical path of the first guide portion
  • a second guide portion comprising:
    • a second input surface arranged to capture and direct the light emitted by the first output surface towards a second optical path of the second guide portion
    • a second output surface, arranged at the output of the second optical path of the second guide portion
characterized in that the first guide portion and/or the second guide portion is integrally formed with:
  • positioning means arranged to block at least three degrees of freedom between the first exit surface and the second entry surface,
  • locking means comprising at least one flexible portion, arranged to lock the blocking of said degrees of freedom, by elastic deformation of said at least one flexible portion.

Avantageusement, les moyens de positionnement sont agencés pour bloquer au moins cinq degrés de liberté entre la première surface de sortie et la deuxième surface d'entrée.Advantageously, the positioning means are arranged to block at least five degrees of freedom between the first exit surface and the second entry surface.

Avantageusement, les moyens de positionnement comprennent une pluralité de plots d'appui agencés sur l'une de la première surface de sortie ou de la deuxième surface d'entrée, et agencés pour prendre appui sur l'autre de la première surface de sortie ou de la deuxième surface d'entrée, de sorte à bloquer au moins un premier degré de liberté en translation selon une première direction. De tels plots d'appuis peuvent par exemple bloquer une translation en X, et aussi une ou deux rotations selon un axe perpendiculaire à cette direction.Advantageously, the positioning means comprise a plurality of bearing studs arranged on one of the first exit surface or the second entry surface, and arranged to rest on the other of the first exit surface or of the second entry surface, so as to block at least a first degree of freedom in translation in a first direction. Such support pads can for example block a translation in X, and also one or two rotations along an axis perpendicular to this direction.

Avantageusement, les moyens de positionnement comprennent une pluralité de crochets agencés sur l'une de la première portion de guidage ou de la deuxième portion de guidage, de sorte à s'accoupler avec l'autre de la première portion de guidage ou de la deuxième portion de guidage, de sorte à verrouiller le premier degré de liberté selon la deuxième direction, et à bloquer au moins un deuxième degré de liberté en translation. Le deuxième degré de liberté est typiquement selon la direction Y.Advantageously, the positioning means comprise a plurality of hooks arranged on one of the first guide portion or the second guide portion, so as to mate with the other of the first guide portion or the second guide portion, so as to lock the first degree of freedom in the second direction, and to block at least a second degree of freedom in translation. The second degree of freedom is typically along the Y direction.

Avantageusement, les moyens de positionnement et les moyens de verrouillage comprennent au moins une patte flexible agencée sur l'une de la première portion de guidage ou de la deuxième portion de guidage, de sorte à s'accoupler avec l'autre de la première portion de guidage ou de la deuxième portion de guidage, de sorte à bloquer au moins un troisième degré de liberté en translation et à verrouiller la première portion de guidage sur la deuxième portion de guidage. Le troisième degré de liberté est typiquement selon la direction Z. On peut envisager un engagement ou un accouplement par emboîtement élastique, autrement appelé clipsage ou clipage.Advantageously, the positioning means and the locking means comprise at least one flexible lug arranged on one of the first guide portion or the second guide portion, so as to mate with the other of the first portion guide or the second guide portion, so as to block at least a third degree of freedom in translation and to lock the first guide portion on the second guide portion. The third degree of freedom is typically in the direction Z. It is possible to envisage engagement or coupling by elastic interlocking, otherwise called clipping or clipping.

Avantageusement, la première portion de guidage et/ou la deuxième portion de guidage sont des portions de guidage minces et/ou planes. En d'autres termes, les portions de guidage présentent une section transversale (typiquement perpendiculaire au chemin optique, c'est-à-dire au trajet de la lumière) qui présente une largeur nettement inférieure à sa longueur, et le chemin optique total présente une longueur également nettement supérieure à la largeur de la section transversale.Advantageously, the first guide portion and/or the second guide portion are thin and/or planar guide portions. In other words, the guide portions have a cross section (typically perpendicular to the optical path, i.e. the path of light) which has a width that is significantly less than its length, and the total optical path has a length also significantly greater than the width of the cross section.

Un deuxième aspect de l'invention concerne un dispositif de signalisation, tel qu'un dispositif d'indication de changement de direction et/ou de position, comprenant :

  • un guide de lumière selon le premier aspect de l'invention,
  • au moins une source de lumière agencée pour émettre au moins une lumière de signalisation
A second aspect of the invention relates to a signaling device, such as a device for indicating a change of direction and/or position, comprising:
  • a light guide according to the first aspect of the invention,
  • at least one light source arranged to emit at least one signaling light

Avantageusement, ladite au moins une source de lumière est fixée sur la première portion de guidage.Advantageously, said at least one light source is fixed to the first guide portion.

Avantageusement, le guide de lumière comprend deux sources de lumière, chacune agencée pour émettre une lumière de signalisation spécifique.Advantageously, the light guide comprises two light sources, each arranged to emit specific signaling light.

Un troisième aspect de l'invention concerne un véhicule automobile, comprenant au moins un guide de lumière selon le premier aspect de l'invention.A third aspect of the invention relates to a motor vehicle, comprising at least one light guide according to the first aspect of the invention.

D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description détaillée qui suit d'un mode de réalisation de l'invention donné à titre d'exemple nullement limitatif et illustré par les dessins annexés, dans lesquels :

  • la figure 1 représente une vue générale d'un guide de lumière selon l'invention ;
  • la figure 2 représente une vue arrière du guide de lumière de la figure 1 ;
  • la figure 3 représente une première portion de guidage du guide de lumière de la figure 1 ;
  • la figure 4 représente une deuxième portion de guidage du guide de lumière de la figure 1 ;
  • la figure 5 représente un détail de la deuxième portion de guidage du guide de lumière de la figure 1 ;
  • la figure 6 représente un détail du guide de lumière de la figure 1, vu sous un premier angle ;
  • la figure 7 représente le détail du guide de lumière de la figure 1, vu sous un deuxième angle ;
  • la figure 8 représente un autre détail du guide de lumière de la figure 1 ;
  • la figure 9 représente deux exemples schématiques de réalisation du guide de lumière de la figure 1.
Other characteristics and advantages of the present invention will appear more clearly on reading the following detailed description of an embodiment of the invention given by way of non-limiting example and illustrated by the appended drawings, in which:
  • the figure 1 represents a general view of a light guide according to the invention;
  • the picture 2 shows a rear view of the light guide of the figure 1 ;
  • the picture 3 represents a first guide portion of the light guide of the figure 1 ;
  • the figure 4 represents a second guide portion of the light guide of the figure 1 ;
  • the figure 5 shows a detail of the second guide portion of the light guide of the figure 1 ;
  • the figure 6 represents a detail of the light guide of the figure 1 , seen from a first angle;
  • the figure 7 represents the detail of the light guide of the figure 1 , seen from a second angle;
  • the figure 8 represents another detail of the light guide of the figure 1 ;
  • the figure 9 shows two schematic embodiments of the light guide of the figure 1 .

La figure 1 présente un guide de lumière selon la présente invention, comprenant une première portion de guidage 10 accouplée à une deuxième portion de guidage 20. Par convention dans la présente demande, la première portion de guidage 10 définit un premier chemin optique qui est en amont (c'est-à-dire proche de la source de lumière), et la deuxième portion de guidage 20 forme un deuxième chemin optique qui est en aval (c'est-à-dire que la première portion de guidage 10 est située entre la source de lumière et la deuxième portion de guidage 20). Typiquement, c'est la deuxième portion de guidage 20 et en particulier sa surface de sortie qui sera visible pour le client.The figure 1 presents a light guide according to the present invention, comprising a first guide portion 10 coupled to a second guide portion 20. By convention in the present application, the first guide portion 10 defines a first optical path which is upstream (c that is to say close to the light source), and the second guide portion 20 forms a second optical path which is downstream (that is to say that the first guide portion 10 is located between the source of light and the second guide portion 20). Typically this is the second serving guide 20 and in particular its exit surface which will be visible to the customer.

De cette manière, il est aisé de prévoir par exemple la première portion de guidage 10 avec une forme standard, et de modeler la surface de sortie 20s de la deuxième portion de guidage 20 pour respecter les contraintes d'aspect, si bien que le guide de lumière comprend une première portion de guidage 10 standard utilisable sur plusieurs modèles de véhicule et une deuxième portion de guidage 20 dont la sortie est spécifique à un véhicule donné.In this way, it is easy to provide, for example, the first guide portion 10 with a standard shape, and to model the exit surface 20s of the second guide portion 20 to respect the appearance constraints, so that the guide light comprises a first guide portion 10 standard usable on several vehicle models and a second guide portion 20 whose output is specific to a given vehicle.

La figure 2 représente une vue arrière de la première portion de guidage 10 qui embarque les sources de lumières, qui sont ici une ou plusieurs diodes électroluminescentes (DELs ou LEDs) montées sur un circuit électronique 40.The picture 2 represents a rear view of the first guide portion 10 which embeds the light sources, which are here one or more light-emitting diodes (LEDs or LEDs) mounted on an electronic circuit 40.

L'invention propose aussi une solution de fixation intégrée pour solidariser la première portion de guidage 10 et la deuxième portion de guidage 20, comme le montrent les figure 3 et 4. En effet, des plots 31 sont formés sur une surface d'entrée 20e de la deuxième portion de guidage 20, qui viennent en appui sur une surface de sortie 10s de la première portion de guidage 10. Ces plots 31 font donc partie de moyens de positionnement, et bloquent dont un premier degré de liberté, ici une translation selon un axe X du véhicule. La figure 5 montre en gros plan ces plots 31.The invention also proposes an integrated fixing solution for securing the first guide portion 10 and the second guide portion 20, as shown by the figures 3 and 4 . In fact, studs 31 are formed on an entry surface 20e of the second guide portion 20, which bear against an exit surface 10s of the first guide portion 10. These studs 31 therefore form part of means of positioning, and which block a first degree of freedom, here a translation along an X axis of the vehicle. The figure 5 shows in close-up these plots 31.

Les moyens de positionnement comprennent aussi des crochets 32b formés sur la surface d'entrée 20e de la deuxième portion de guidage 20 (visibles figure 4), qui viennent se loger dans des ouvertures 32a ménagées dans la surface de sortie 10s de la première portion de guidage 10. Ces crochets 32b et ouvertures 32a font dont partie des moyens de positionnement, et bloquent alors un deuxième degré de liberté, ici une translation selon un axe Y du véhicule. Les figures 6 et 7 montrent en gros plan et selon deux angles différents les pièces assemblées, avec les crochets 32b engagés dans les ouvertures 32a.The positioning means also comprise hooks 32b formed on the entry surface 20e of the second guide portion 20 (visible figure 4 ), which are housed in openings 32a formed in the exit surface 10s of the first guide portion 10. These hooks 32b and openings 32a are part of the positioning means, and then block a second degree of freedom, here a translation along a Y axis of the vehicle. The figures 6 and 7 show in close-up and from two different angles the assembled parts, with the hooks 32b engaged in the openings 32a.

De plus, une patte flexible 33a est prévue sur la première portion de guidage 10, pour coopérer avec un taquet 33b de la deuxième portion de guidage, pour bloquer le dernier degré de liberté en translation (selon la direction Z), et aussi pour s'engager après déformation et retour élastique sur le taquet 33b (par clippage ou clipsage ou emboîtement élastique), de sorte à former aussi des moyens de verrouillage, en plus de faire partie des moyens de positionnement. La figure 8 représente un gros plan de la patte flexible 32a engagée avec le taquet 33b.In addition, a flexible tab 33a is provided on the first guide portion 10, to cooperate with a catch 33b of the second guide portion, to block the last degree of freedom in translation (in the direction Z), and also to s Engage after deformation and elastic return on the cleat 33b (by clipping or clipping or elastic interlocking), so as to also form locking means, in addition to being part of the positioning means. The figure 8 shows a close-up of flexible tab 32a engaged with cleat 33b.

En résumé, les plots 31, les ouvertures 32a, les crochets 32b, la patte flexible 33a et le taquet 33b forment des moyens de positionnement de la première portion de guidage 10 sur la deuxième portion de guidage 20 et sont intégrés sur ces pièces (réalisées par exemple d'un seul bloc par injection/moulage en une seule matière). Une partie de ces moyens de positionnement forment aussi des moyens de verrouillage, si bien que la première portion de guidage 10 est fermement fixée à la deuxième portion de guidage 20 pour former le guide de lumière selon l'invention.In summary, the studs 31, the openings 32a, the hooks 32b, the flexible tab 33a and the cleat 33b form means for positioning the first guide portion 10 on the second guide portion 20 and are integrated on these parts (made for example in a single block by injection/moulding in a single material). Part of these positioning means also form locking means, so that the first guide portion 10 is firmly fixed to the second guide portion 20 to form the light guide according to the invention.

La figure 9 représente deux alternatives de réalisation du guide de lumière selon l'invention qui est accouplé à deux types de sources lumineuses 41 et 42.The figure 9 represents two alternative embodiments of the light guide according to the invention which is coupled to two types of light sources 41 and 42.

Dans la vue de gauche, les sources lumineuses 41 et 42 sont empilées ou décalées selon une direction normale à cette vue, fixées sur un circuit imprimé 43, et en vis-à-vis d'une seule surface d'entrée de la première portion de guidage 10, qui est accouplées avec les moyens de positionnement et de verrouillage avec la deuxième portion de guidage 20.In the left view, the light sources 41 and 42 are stacked or offset along a direction normal to this view, fixed on a printed circuit 43, and facing a single input surface of the first portion guide 10, which is coupled with the positioning and locking means with the second guide portion 20.

Dans la vue de droite, les sources de lumière 41 et 42 sont séparées, si bien que la première portion de guidage 10' présente deux surfaces d'entrée, et une seule surface de sortie, qui est en vis-à-vis avec la surface d'entrée de la deuxième portion de guidage 20'.In the view on the right, the light sources 41 and 42 are separated, so that the first guide portion 10' has two entry surfaces, and a single exit surface, which faces the entry surface of the second guide portion 20'.

En tout état de cause, seule la deuxième portion de guidage 20 ou 20' est visible de l'extérieur, si bien que seule cette dernière serait à modifier en cas d'adaptation à un nouveau véhicule. De plus, les interfaces (moyens de positionnement et moyens de verrouillage) entre la première portion de guidage 10 ou 10' la deuxième portion de guidage 20 ou 20' sont identiques, et toujours intégrées directement au corps de ces pièces, qui sont alors de fabrication et d'assemblage aisés.In any event, only the second guide portion 20 or 20' is visible from the outside, so that only the latter would have to be modified in the event of adaptation to a new vehicle. In addition, the interfaces (positioning means and locking means) between the first guide portion 10 or 10' and the second guide portion 20 or 20' are identical, and always integrated directly into the body of these parts, which are then of easy to manufacture and assemble.

Claims (8)

  1. A light guide of a vehicle light signaling device comprising at least one light source (41, 42) arranged to emit at least one signal light, the light guide comprising:
    - a first guide portion (10) defining a first optical path,
    - a second guide portion (20) defining a second optical path, following the first optical path
    wherein the first guide portion (10) and/or the second guide portion (20) is integrally formed with :
    - positioning means arranged to block at least three degrees of freedom between the first guide portion (10) and the second guide portion (20), wherein the positioning means comprise a plurality of bearing studs (31) arranged on an exit surface of the first optical path or on an entry surface of the second optical path and arranged to rest respectively on the input surface of the second optical path or on the output surface of the first optical path, so as to block at least a first degree of freedom in translation along a first direction, characterized in that the light guide comprises : - locking means comprising at least one flexible portion ,arranged to lock said degrees of freedom, by elastic deformation of said at least one flexible portion and wherein the positioning means comprise a plurality of hooks (32b) arranged on one of the first guide portion (10) or the second guide portion (20) so as to mate with the other of the first guide portion (10) or the second guide portion (20), so as to lock the first degree of freedom along the second direction, and to block at least a second degree of freedom in translation.
  2. The light guide of the preceding claim, wherein the positioning means are arranged to lock at least five degrees of freedom between the first guide portion (10) and the second guide portion (20).
  3. The light guide according to any of the preceding claims, wherein the positioning means and the locking means comprise at least one flexible tab (33a) as a flexible portion arranged on one of the first guide portion (10) or the second guide portion (20), so as to mate with the other of the first guide portion (10) or the second guide portion (20), so as to block at least a third degree of translational freedom and lock the first guide portion (10) to the second guide portion (20).
  4. The light guide according to any of the preceding claims, wherein the first guide portion (10) and/or the second guide portion (20) are thin and/or flat guide portions
  5. A light signaling device, such as a direction and/or position change indicating device, comprising:
    - a light guide according to any of the preceding claims,
    - at least one light source (41, 42) arranged to emit at least one signal light.
  6. The signaling device according to the preceding claim, wherein said at least one light source (41, 42) is attached to the first guide portion (10).
  7. The signaling device of either claim 5 or 6, comprising two light sources, each arranged to emit a specific signaling light.
  8. A motor vehicle, comprising at least one light guide according to any of claims 1 to 4.
EP19794591.8A 2018-09-27 2019-09-13 Light guide for a vehicle lighting device Active EP3857120B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1858853A FR3086729B1 (en) 2018-09-27 2018-09-27 LIGHT GUIDE OF A VEHICLE LIGHTING DEVICE
PCT/FR2019/052129 WO2020065171A1 (en) 2018-09-27 2019-09-13 Light guide for a vehicle lighting device

Publications (2)

Publication Number Publication Date
EP3857120A1 EP3857120A1 (en) 2021-08-04
EP3857120B1 true EP3857120B1 (en) 2023-01-11

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Application Number Title Priority Date Filing Date
EP19794591.8A Active EP3857120B1 (en) 2018-09-27 2019-09-13 Light guide for a vehicle lighting device

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EP (1) EP3857120B1 (en)
CN (1) CN112739952B (en)
FR (1) FR3086729B1 (en)
WO (1) WO2020065171A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102006044640A1 (en) * 2006-09-19 2008-03-27 Schefenacker Vision Systems Germany Gmbh Lighting unit for high and low beam generation
EP2438350A1 (en) * 2009-06-02 2012-04-11 Koninklijke Philips Electronics N.V. Apparatus and system for separating space
KR101594620B1 (en) * 2009-07-14 2016-02-17 엘지디스플레이 주식회사 Back light unit and liquid crystal display device having the same
JP5396498B2 (en) * 2012-03-02 2014-01-22 株式会社エス・ケー・ジー Light emitting device
DE102013008433B4 (en) * 2013-05-17 2020-12-03 Lisa Dräxlmaier GmbH Flat device for illuminating the interior of a vehicle
FR3031793B1 (en) * 2015-01-15 2017-01-27 Valeo Iluminacion Sa VEHICLE LIGHT DEVICE IN WHICH A LIGHT GUIDE SUPPORTS ANOTHER LIGHT GUIDE
FR3033621B1 (en) * 2015-03-13 2017-04-21 Valeo Iluminacion Sa LIGHT DEVICE WITH OPTICAL GUIDES
JP6599647B2 (en) * 2015-06-05 2019-10-30 株式会社小糸製作所 Vehicle lighting
AT517414A1 (en) 2015-06-29 2017-01-15 Zkw Group Gmbh Optical fiber arrangement for generating at least one illumination function and / or signaling function of a motor vehicle headlight
CN205755181U (en) * 2016-05-09 2016-11-30 中兴通讯股份有限公司 Fixing device
DE102016109132A1 (en) * 2016-05-18 2017-11-23 Hella Kgaa Hueck & Co. Headlight, in particular headlight of a motor vehicle
FR3063797B1 (en) * 2017-03-07 2019-03-22 Peugeot Citroen Automobiles Sa LIGHTING DEVICE WITH SIMPLIFIED AND PRECISE POSITIONING OF LIGHT SOURCES AND LIGHT GUIDES

Also Published As

Publication number Publication date
CN112739952A (en) 2021-04-30
FR3086729B1 (en) 2021-04-23
WO2020065171A1 (en) 2020-04-02
EP3857120A1 (en) 2021-08-04
CN112739952B (en) 2023-05-30
FR3086729A1 (en) 2020-04-03

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