WO2019219935A1 - Bodywork part comprising a device for a lighting signature comprising an incurved support - Google Patents

Bodywork part comprising a device for a lighting signature comprising an incurved support Download PDF

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Publication number
WO2019219935A1
WO2019219935A1 PCT/EP2019/062853 EP2019062853W WO2019219935A1 WO 2019219935 A1 WO2019219935 A1 WO 2019219935A1 EP 2019062853 W EP2019062853 W EP 2019062853W WO 2019219935 A1 WO2019219935 A1 WO 2019219935A1
Authority
WO
WIPO (PCT)
Prior art keywords
support
reflector
light sources
light
curved
Prior art date
Application number
PCT/EP2019/062853
Other languages
French (fr)
Inventor
Issam KHAYAT
Gérald Andre
Goulven GENTIL
Original Assignee
Compagnie Plastic Omnium
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Compagnie Plastic Omnium filed Critical Compagnie Plastic Omnium
Publication of WO2019219935A1 publication Critical patent/WO2019219935A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/2661—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic mounted on parts having other functions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/0029—Spatial arrangement
    • B60Q1/0035—Spatial arrangement relative to the vehicle
    • 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]
    • 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
    • F21S43/15—Strips of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • F21S43/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • F21S43/19—Attachment of light sources or lamp holders
    • F21S43/195—Details of lamp holders, terminals or connectors
    • 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/37—Attachment thereof

Definitions

  • the invention relates to motor vehicle body parts and more particularly bodywork parts comprising at least one light device.
  • Light device means a device capable of diffusing light towards the outside of the vehicle.
  • a device generally comprises a support on which light sources, for example light-emitting diodes, are arranged.
  • light sources for example light-emitting diodes
  • the FR4 LED PCB for "Flame Resistant 4 Light-emitting diode printed circuit board”
  • Such a support can be attached to a housing.
  • the housing can also form a light reflecting device capable of reflecting the light emitted by the light sources.
  • An optical box is a box adapted to receive a functional assembly, such as electrical means, electronic means and optical means (such as the light reflector for example), to fulfill the lighting function of a vehicle.
  • a functional assembly such as electrical means, electronic means and optical means (such as the light reflector for example), to fulfill the lighting function of a vehicle.
  • Such luminous devices may constitute aesthetic pieces, arranged for example on the front face, or on the doors of a vehicle to achieve a light signature.
  • Light devices such as that described above have a major disadvantage. Indeed, the support of the light sources, typically a printed circuit, has a coefficient of thermal expansion lower than that of the plastic part, for example the housing.
  • the connection between the light sources, for example the LEDs, and the reflector device or devices is very precise (it is necessary to the light emitted by the light sources is appropriately reflected by the reflector device).
  • the alignment between the light sources and the reflector device or devices must be plus or minus 0.5 mm along a longitudinal axis of the light signature and plus or minus 0.2 mm along a transverse axis of the light signature.
  • a motor vehicle can be exposed to temperatures ranging from -40 to +85 degrees Celsius.
  • the expansion of the reflector device is then greater than that of the light source support.
  • this difference in expansion was not a problem because the parts were small.
  • this difference of expansion can for example go up to 2 or 3 millimeters for parts of an initial length about 500 millimeters.
  • An offset may therefore appear between the light sources and the reflective device which can lead to a loss of homogeneity and quality of the light signature. This offset can be relatively large with longer light devices (to limit the number of devices to mount on the body parts).
  • the invention aims to overcome this disadvantage by providing a body part to maintain the homogeneity and quality of the light signature regardless of the conditions in which the vehicle evolves.
  • the invention relates to a motor vehicle body part comprising:
  • a main body comprising at least one transparent or semi-opaque zone
  • At least one support comprising light sources capable of diffusing light through the transparent or semi-opaque zone, the support having a first coefficient of thermal expansion
  • the reflector disposed between the light sources and the main body, the reflector having through-holes forming channels, each of the light sources being able to diffuse light through a through-orifice, the reflector having a second coefficient of expansion thermal superior to the first coefficient of thermal expansion, the support being able to deform and comprising at least one more curved area that a reflector area facing it.
  • the capacity of the support to compensate for a variation in the length of the reflector being longer than the latter makes it possible to maintain the alignment between the reflector and the light sources regardless of the conditions to which the vehicle is exposed and thus allows a conservation of the homogeneity and quality of the light signature, particularly in case of dilatation of the reflector.
  • the bodywork part according to the invention may further comprise at least one of the following features:
  • the support comprises several portions each comprising several light sources, each portion being fixed to a reflector so as to be more curved than said reflector;
  • the reflector comprises fixing studs and the support comprises fixing holes adapted to cooperate with the fixing studs, the distance between two fastening holes present on the support being greater than the distance between two studs present on the reflector. and collaborating with the two fixing holes;
  • the support comprises several portions each comprising several light sources, the support comprising between each portion a more curved zone that the portions comprising the light sources;
  • a stiffening plate is fixed on each portion of the support
  • the curved area is delimited by notches made on the sides of the support on either side of the curved area;
  • the light sources are light-emitting diodes
  • the part comprises several reflectors, the reflectors being spaced apart from one another along the support;
  • the distance between two adjacent reflectors is greater than the maximum length increase of said reflectors.
  • FIG. 1 is a perspective view of a motor vehicle comprising a bodywork part according to the invention
  • FIG. 2 is a sectional view of a bodywork part according to the invention
  • FIG. 3 is a perspective view of a portion of a reflector according to the invention.
  • FIG. 4 is a sectional view of a support / reflector assembly according to a first embodiment of the invention
  • FIG. 5 is a perspective view of a support according to a second embodiment of the invention.
  • FIG. 6 is an exploded view of a support / reflector assembly according to a first variant of the second embodiment of the invention
  • FIG. 7 is a sectional view of a support / reflector assembly of FIG. 6 assembled
  • FIG. 8 is a front view of a support according to a second variant of the second embodiment of the invention.
  • FIG. 9 is a sectional view of a variant of the invention applicable to both embodiments of the invention wherein the diffusion device comprises a plurality of reflectors.
  • FIG. 1 illustrates a motor vehicle 2 comprising a set of body parts.
  • One or more of these body parts may comprise one or more transparent or semi-opaque zones 4 (semi-opaque means a part having an opaque appearance if no light is diffused through the room but allowing the light to pass through disseminated by a source near the latter).
  • the diffusion of a light through the bodywork parts can make it possible to obtain a luminous signature on the external face of the bodywork parts, ie the face of the parts visible by a user located outside the vehicle.
  • light signature is meant a particular form generated by the scattering of light through a bodywork part in order to distinguish one vehicle from another.
  • the bodywork part or parts are equipped with at least one light-scattering device such as that represented in FIG. 2. More precisely, the main body 6 of the bodywork part comprises on its inner face 8 a light diffusion device capable of generating a light signature on its outer face 10.
  • This light diffusion device comprises at least one reflector 12 attached to the main body 6 (for example by means of clips or any other fastener).
  • the reflector 12 is able, as explained above, to reflect the light emitted by a light source 16 to obtain the expected light signature on the bodywork part.
  • the reflector 12 is made of plastic, for example in a thermoplastic material such as polycarbonate or polypropylene. Such materials have particular linear thermal expansion coefficients, for example 70 ⁇ m / m / ° C for polycarbonate or 150 ⁇ m / m / ° C for polypropylene.
  • the light scattering device also comprises several light sources 16 located at one end of the reflector 12 opposite the end of the reflector 12 located near the main body 6 so that the reflector 12 is between the sources 16 and the main body 6.
  • These light sources 16 may for example be LEDs.
  • the light sources 16 are mounted on at least one support 18 fixed on the reflector 12. It may be a fixing by clipping, screwing, ...
  • This support 18 may for example be a printed circuit on which the light sources are mounted. It is connected to a source of energy of the vehicle for lighting the light sources, in particular to create dynamic lighting.
  • the support 18 is flexible and has a particular linear thermal expansion coefficient, which may be equal to 25 pm / m / ° C for a flexibly deformable support.
  • the reflector 12 comprises through orifices 20 forming channels and at least one attachment stud 22 to the support 18 (the support comprising fixing orifices 24 collaborating with the fixing studs, see FIG. 9) as can be seen in FIG.
  • the reflector 12 comprises as many through-holes 20 as the support 18a of light sources 16. The latter extend inside the through openings 20 in order to diffuse light through them to the main body 6 .
  • the coefficient of linear thermal expansion of the reflector 12 is greater than that of the support 18.
  • the motor vehicle 2 can be exposed to temperatures ranging from -40 ° C. to + 85 ° C. It is possible that the expansion of the reflector 12 is greater than that of the support 18.
  • the reflector 12 and the support 18 are therefore fixed to each other so as to maintain the coincidence between the light sources 16 and the orifices passing through. 20 of the reflector 18.
  • FIG. 4 illustrates a first embodiment of the invention in which the fixing of the reflector 12 to the support 18 makes it possible to preserve the initial disposition of the various elements within the light diffusion device.
  • the support 18 comprises curved portions 26. More particularly, the support 18, when attached to the reflector 12, comprises curved portions 26 on which light sources 16 are mounted. These latter extend at least partially inside the through orifices 20 of the reflector 12. To do this, the distance between two fixing orifices 24 present on the support 18 is greater than the distance between two fixing studs 22 present. on the reflector 12 collaborating with the two fixing holes. This leads to the formation of a curved portion 26 facing a linear reflector 12 (or at least less curved than the portion 26). Preferably, the distance between the two fixing orifices 24 is at least equal to the maximum distance between the two fixing studs 22, that is to say when the reflector 12 has a maximum expansion.
  • the support 18 is able to increase its length by a length equivalent to that of the reflector 12 while maintaining the alignment between the through holes 20 and the light sources 16.
  • the Reflector 12 elongates exerts a stress on the curved support 18 which is stretched more and more in order to follow the elongation of the reflector 12.
  • the portion 26 is suitable to curl again.
  • FIGS. 5 to 8 illustrate a second embodiment of the invention in which the support 18 also comprises curved zones 28, curved zones 28 located between light sources 16 or groups of light sources 16. This embodiment is compatible with FIG. with the first embodiment.
  • the light sources 16 extend inside the through holes 20 in the same manner regardless of the length of the reflector 12.
  • Each curved zone 28 may be facing a reflector 12 fixed to the support 18 on either side of the curved zone 28. It is possible for a plurality of curved zones 28 to face a reflector 12 attached to the support 18 of FIGS. On either side of the curved zones 28.
  • the support 18 is here made of a flexible material which is deformable.
  • the operating principle is identical to that of the first embodiment.
  • the support 18 is able to lengthen over a length equivalent to that of the reflector 12 expanding. This is made possible by fixing the reflector 12 on either side of the curved area 28 (or curved areas 28).
  • the elongate reflector 12 exerts a stress on the support 18 which leads to a progressive tensioning of the curved zone or zones 28.
  • the curved zones 28 may be of a length equal to or greater than the maximum length increase reflector 12.
  • a first variant of the second embodiment of the invention consists in fixing one or more stiffening plates 30 capable of preventing the deformation of the zone or zones of the support 18 by contact with said stiffening plates 30, deformation occurring during the attachment of the support 18 to the reflector 12 and during a retraction of the reflector 12.
  • the stiffening plates 30 comprise fastening elements 32 allowing the connection between the stiffening plate 30 and the reflector 12, the support being inserted between the two.
  • FIG. 8 Another variant, illustrated in FIG. 8 and compatible with the first variant, consists in making notches 34 on either side of the support areas 18 intended to be curved.
  • the support 18 comprises for each of these areas four notches 34, a first pair placed on one side of the support 18 and a second pair facing the first.
  • These notches 34 can be made during the formation of the support 18 by point deformation of the latter or after it by excision of material.
  • FIG. 9 represents a variant of the invention that can be implemented in each of the two embodiments.
  • the device comprises several reflectors 12 fixed to the support 18.
  • Each reflector 12 is fixed to the support 18 so as to be located at a distance from the reflector or reflectors 12 neighbors.
  • each reflector 12 of a reduced size is less than the variation in length of a single reflector of a much larger size, in the case where there is only one reflector 12 for the entire length of the light zone. This variant therefore corresponds to the creation of sub-sets of light sources 16 / support 18 / reflector 12 independent of each other.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention relates to a motor vehicle bodywork part comprising: a main body (6) comprising at least one transparent or semi-opaque zone; at least one support (18) comprising light sources (16) that can scatter light through the transparent or semi-opaque zone, the support (18) having a first thermal expansion coefficient; and at least one reflector (12) arranged between the light sources (16) and the main body (6), the reflector (12) having through-openings (20) forming channels, each light source (16) being able to scatter light through a through-opening (20), the reflector (12) having a second thermal expansion coefficient higher than the first thermal expansion coefficient, and the support (18) being deformable and comprising at least one zone (26, 28) which is more incurved than a zone of the reflector (12) facing same.

Description

PIECE DE CARROSSERIE COMPRENANT UN DISPOSITIF POUR UNE SIGNATURE LUMINEUSE COMPRENANT UN SUPPORT INCURVE  BODY PIECE COMPRISING A DEVICE FOR A LIGHT SIGNATURE INCLUDING A CURVED SUPPORT
L’invention concerne les pièces de carrosserie de véhicule automobile et plus particulièrement les pièces de carrosserie comprenant au moins un dispositif lumineux.The invention relates to motor vehicle body parts and more particularly bodywork parts comprising at least one light device.
On entend par dispositif lumineux un dispositif apte à diffuser de la lumière vers l’extérieur du véhicule. Un tel dispositif comporte généralement un support sur lequel des sources lumineuses, par exemple des diodes électroluminescentes, sont disposées. On peut citer par exemple les FR4 LED PCB (pour « Flame Résistant 4 Light-emitting diode printed circuit board »). Un tel support peut être fixé à un boîtier. Le boîtier peut également former un dispositif réflecteur de lumière apte à réfléchir la lumière émise par les sources lumineuses. Light device means a device capable of diffusing light towards the outside of the vehicle. Such a device generally comprises a support on which light sources, for example light-emitting diodes, are arranged. For example, the FR4 LED PCB (for "Flame Resistant 4 Light-emitting diode printed circuit board"). Such a support can be attached to a housing. The housing can also form a light reflecting device capable of reflecting the light emitted by the light sources.
Un boîtier optique est un boîtier adapté à recevoir un ensemble fonctionnel, tels que des moyens électriques, des moyens électroniques et des moyens optiques (comme le réflecteur de lumière par exemple), permettant de remplir la fonction d’éclairage d’un véhicule.  An optical box is a box adapted to receive a functional assembly, such as electrical means, electronic means and optical means (such as the light reflector for example), to fulfill the lighting function of a vehicle.
De tels dispositifs lumineux peuvent constituer des pièces esthétiques, disposées par exemple en face avant, ou sur les portières d’un véhicule afin de réaliser une signature lumineuse.  Such luminous devices may constitute aesthetic pieces, arranged for example on the front face, or on the doors of a vehicle to achieve a light signature.
Les dispositifs lumineux tels que celui décrit ci-dessus comportent un inconvénient majeur. En effet, le support des sources lumineuses, typiquement un circuit imprimé, possède un coefficient de dilatation thermique inférieur à celui de la pièce en matière plastique, par exemple le boîtier.  Light devices such as that described above have a major disadvantage. Indeed, the support of the light sources, typically a printed circuit, has a coefficient of thermal expansion lower than that of the plastic part, for example the housing.
Or, afin de réaliser une signature lumineuse homogène et de qualité tout au long de la vie du véhicule, il est indispensable que l’assemblage entre les sources lumineuses, par exemple les LED, et le ou les dispositifs réflecteurs soit très précis (il faut que la lumière émise par les sources lumineuses soit réfléchie de manière appropriée par le dispositif réflecteur). L’alignement entre les sources lumineuses et le ou les dispositifs réflecteurs doit être de plus ou moins 0,5 mm selon un axe longitudinal de la signature lumineuse et de plus ou moins 0,2 mm selon un axe transversal de la signature lumineuse.  However, in order to achieve a homogeneous and quality light signature throughout the life of the vehicle, it is essential that the connection between the light sources, for example the LEDs, and the reflector device or devices is very precise (it is necessary to the light emitted by the light sources is appropriately reflected by the reflector device). The alignment between the light sources and the reflector device or devices must be plus or minus 0.5 mm along a longitudinal axis of the light signature and plus or minus 0.2 mm along a transverse axis of the light signature.
Un véhicule automobile peut être exposé à des températures variant de -40 à +85 degrés Celsius. La dilatation du dispositif réflecteur est alors plus importante que celle du support des sources lumineuses. Jusqu’à présent, cette différence de dilatation ne posait pas de problème car les pièces étaient de petites dimensions. Par contre, avec la tendance vers l’allongement des zones lumineuses, cette différence de dilatation peut par exemple aller jusqu’à 2 ou 3 millimètres pour des pièces d’une longueur initiale d’environ 500 millimètres. Un décalage peut dès lors apparaître entre les sources lumineuses et le dispositif réflecteur ce qui peut conduire à une perte d’homogénéité et de qualité de la signature lumineuse. Ce décalage peut être relativement important avec des dispositifs lumineux plus long (pour limiter le nombre de dispositifs à monter sur la ou les pièces de carrosserie). A motor vehicle can be exposed to temperatures ranging from -40 to +85 degrees Celsius. The expansion of the reflector device is then greater than that of the light source support. Until now, this difference in expansion was not a problem because the parts were small. On the other hand, with the tendency towards the elongation of the luminous zones, this difference of expansion can for example go up to 2 or 3 millimeters for parts of an initial length about 500 millimeters. An offset may therefore appear between the light sources and the reflective device which can lead to a loss of homogeneity and quality of the light signature. This offset can be relatively large with longer light devices (to limit the number of devices to mount on the body parts).
L’invention a pour but de remédier à cet inconvénient en fournissant une pièce de carrosserie permettant de conserver l’homogénéité et la qualité de la signature lumineuse quelles que soient les conditions dans lesquelles évolue le véhicule.  The invention aims to overcome this disadvantage by providing a body part to maintain the homogeneity and quality of the light signature regardless of the conditions in which the vehicle evolves.
Ainsi, l’invention concerne une pièce de carrosserie de véhicule automobile comprenant :  Thus, the invention relates to a motor vehicle body part comprising:
- un corps principal comprenant au moins une zone transparente ou semi-opaque, a main body comprising at least one transparent or semi-opaque zone,
- au moins un support comprenant des sources lumineuses aptes à diffuser de la lumière à travers la zone transparente ou semi-opaque, le support ayant un premier coefficient de dilatation thermique, et at least one support comprising light sources capable of diffusing light through the transparent or semi-opaque zone, the support having a first coefficient of thermal expansion, and
- au moins un réflecteur disposé entre les sources lumineuses et le corps principal, le réflecteur présentant des orifices traversant formant des canaux, chacune des sources lumineuses étant apte à diffuser de la lumière à travers un orifice traversant, le réflecteur ayant un second coefficient de dilatation thermique supérieur au premier coefficient de dilatation thermique, le support étant apte à se déformer et comprenant au moins une zone plus incurvée qu’une zone du réflecteur lui faisant face.  at least one reflector disposed between the light sources and the main body, the reflector having through-holes forming channels, each of the light sources being able to diffuse light through a through-orifice, the reflector having a second coefficient of expansion thermal superior to the first coefficient of thermal expansion, the support being able to deform and comprising at least one more curved area that a reflector area facing it.
Ainsi, la capacité du support à compenser une variation de longueur du réflecteur en étant plus long que ce dernier permet de conserver l’alignement entre le réflecteur et les sources lumineuses quelle que soient les conditions auxquelles est exposé le véhicule et permet ainsi une conservation de l’homogénéité et de la qualité de la signature lumineuse, notamment en cas de dilatation du réflecteur.  Thus, the capacity of the support to compensate for a variation in the length of the reflector being longer than the latter makes it possible to maintain the alignment between the reflector and the light sources regardless of the conditions to which the vehicle is exposed and thus allows a conservation of the homogeneity and quality of the light signature, particularly in case of dilatation of the reflector.
La pièce de carrosserie selon l’invention peut en outre comprendre au moins une des caractéristiques suivantes :  The bodywork part according to the invention may further comprise at least one of the following features:
- le support comprend plusieurs portions comprenant chacune plusieurs sources lumineuses, chaque portion étant fixée à un réflecteur de manière à être plus incurvée que ledit réflecteur ;  the support comprises several portions each comprising several light sources, each portion being fixed to a reflector so as to be more curved than said reflector;
- le réflecteur comprend des plots de fixation et le support comprend des orifices de fixation aptes à coopérer avec les plots de fixation, la distance entre deux orifices de fixation présents sur le support étant supérieure à la distance entre deux plots de fixation présents sur le réflecteur et collaborant avec les deux orifices de fixation ;  - The reflector comprises fixing studs and the support comprises fixing holes adapted to cooperate with the fixing studs, the distance between two fastening holes present on the support being greater than the distance between two studs present on the reflector. and collaborating with the two fixing holes;
- le support comprend plusieurs portions comprenant chacune plusieurs sources lumineuses, le support comprenant entre chaque portion une zone plus incurvée que les portions comprenant les sources lumineuses ; the support comprises several portions each comprising several light sources, the support comprising between each portion a more curved zone that the portions comprising the light sources;
- une plaque de rigidification est fixée sur chaque portion du support ;  a stiffening plate is fixed on each portion of the support;
- la zone incurvée est délimitée par des encoches réalisées sur les côtés du support de part et d’autre de la zone incurvée ;  - The curved area is delimited by notches made on the sides of the support on either side of the curved area;
- les sources lumineuses sont des diodes électroluminescentes ;  the light sources are light-emitting diodes;
- la pièce comprend plusieurs réflecteurs, les réflecteurs étant espacés les uns par rapport aux autres le long du support ; et  the part comprises several reflectors, the reflectors being spaced apart from one another along the support; and
- la distance entre deux réflecteurs voisins est supérieure à l’augmentation de longueur maximale desdits réflecteurs.  the distance between two adjacent reflectors is greater than the maximum length increase of said reflectors.
Nous allons maintenant présenter deux modes de réalisation de l’invention donnés à titre d’exemples non limitatifs et à l’appui des figures annexées sur lesquelles :  We will now present two embodiments of the invention given by way of non-limiting examples and with reference to the appended figures in which:
- la figure 1 est une vue en perspective d’un véhicule automobile comprenant une pièce de carrosserie selon l’invention,  FIG. 1 is a perspective view of a motor vehicle comprising a bodywork part according to the invention,
- la figure 2 est une vue en coupe d’une pièce de carrosserie selon l’invention, FIG. 2 is a sectional view of a bodywork part according to the invention,
- la figure 3 est une vue en perspective d’une portion d’un réflecteur selon l’invention, FIG. 3 is a perspective view of a portion of a reflector according to the invention,
- la figure 4 est une vue en coupe d’un ensemble support/réflecteur selon un premier mode de réalisation de l’invention,  FIG. 4 is a sectional view of a support / reflector assembly according to a first embodiment of the invention,
- la figure 5 est une vue en perspective d’un support selon un second mode de réalisation de l’invention,  FIG. 5 is a perspective view of a support according to a second embodiment of the invention,
- la figure 6 est une vue éclatée d’un ensemble support/réflecteur selon une première variante du second mode de réalisation de l’invention,  FIG. 6 is an exploded view of a support / reflector assembly according to a first variant of the second embodiment of the invention,
- la figure 7 est une vue en coupe d’un ensemble support/réflecteur de la figure 6 assemblé,  FIG. 7 is a sectional view of a support / reflector assembly of FIG. 6 assembled,
- la figure 8 est une vue de face d’un support selon une deuxième variante du second mode de réalisation de l’invention, et  FIG. 8 is a front view of a support according to a second variant of the second embodiment of the invention, and
- la figure 9 est une vue en coupe d’une variante de l’invention applicable aux deux modes de réalisation de l’invention dans laquelle le dispositif de diffusion comprend plusieurs réflecteurs.  - Figure 9 is a sectional view of a variant of the invention applicable to both embodiments of the invention wherein the diffusion device comprises a plurality of reflectors.
On se réfère maintenant à la figure 1 qui illustre un véhicule automobile 2 comprenant un ensemble de pièces de carrosserie. Une ou plusieurs de ces pièces de carrosserie peuvent comprendre une ou plusieurs zones transparentes ou semi- opaques 4 (on entend par semi-opaque une pièce ayant un aspect opaque si aucune lumière n’est diffusée au travers de la pièce mais laissant passer la lumière diffusée par une source située à proximité de cette dernière). La diffusion d’une lumière au travers des pièces de carrosserie peut permettre d’obtenir une signature lumineuse sur la face externe des pièces de carrosserie, c’est-à-dire la face des pièces visible par un utilisateur situé à l’extérieur du véhicule. On entend par signature lumineuse une forme particulière générée par la diffusion de lumière à travers une pièce de carrosserie afin de distinguer un véhicule d’un autre. Referring now to Figure 1 which illustrates a motor vehicle 2 comprising a set of body parts. One or more of these body parts may comprise one or more transparent or semi-opaque zones 4 (semi-opaque means a part having an opaque appearance if no light is diffused through the room but allowing the light to pass through disseminated by a source near the latter). The diffusion of a light through the bodywork parts can make it possible to obtain a luminous signature on the external face of the bodywork parts, ie the face of the parts visible by a user located outside the vehicle. By light signature is meant a particular form generated by the scattering of light through a bodywork part in order to distinguish one vehicle from another.
Afin de pouvoir réaliser une telle signature lumineuse, la ou les pièces de carrosserie sont équipées d’au moins un dispositif de diffusion de lumière tel que celui représenté sur la figure 2. Plus précisément, le corps principal 6 de la pièce de carrosserie comprend sur sa face interne 8 un dispositif de diffusion de lumière apte à générer une signature lumineuse sur sa face externe 10.  In order to be able to produce such a light signature, the bodywork part or parts are equipped with at least one light-scattering device such as that represented in FIG. 2. More precisely, the main body 6 of the bodywork part comprises on its inner face 8 a light diffusion device capable of generating a light signature on its outer face 10.
Ce dispositif de diffusion de lumière comprend au moins un réflecteur 12 fixé au corps principal 6 (par exemple par l’intermédiaire de clips ou tout autre organe de fixation). Le réflecteur 12 est apte, comme expliqué plus haut, à réfléchir la lumière émise par une source lumineuse 16 afin d’obtenir la signature lumineuse attendue sur la pièce de carrosserie. Le réflecteur 12 est réalisé en matière plastique, par exemple dans un matériau thermoplastique comme par exemple le polycarbonate ou le polypropylène. De tels matériaux ont des coefficients de dilatation thermique linéaires particuliers, par exemple de 70 pm/m/°C pour le polycarbonate ou de 150 pm/m/°C pour le polypropylène.  This light diffusion device comprises at least one reflector 12 attached to the main body 6 (for example by means of clips or any other fastener). The reflector 12 is able, as explained above, to reflect the light emitted by a light source 16 to obtain the expected light signature on the bodywork part. The reflector 12 is made of plastic, for example in a thermoplastic material such as polycarbonate or polypropylene. Such materials have particular linear thermal expansion coefficients, for example 70 μm / m / ° C for polycarbonate or 150 μm / m / ° C for polypropylene.
Le dispositif de diffusion de lumière comprend également plusieurs sources lumineuses 16 situées au niveau d’une extrémité du réflecteur 12 opposée à l’extrémité du réflecteur 12 située à proximité du corps principal 6 de manière à ce que le réflecteur 12 se situe entre les sources lumineuses 16 et le corps principal 6. Ces sources lumineuses 16 peuvent par exemple être des LED.  The light scattering device also comprises several light sources 16 located at one end of the reflector 12 opposite the end of the reflector 12 located near the main body 6 so that the reflector 12 is between the sources 16 and the main body 6. These light sources 16 may for example be LEDs.
Les sources lumineuses 16 sont montées sur au moins un support 18 fixé sur le réflecteur 12. Il peut s’agir d’une fixation par clipsage, vissage,... Ce support 18 peut par exemple être un circuit imprimé sur lequel les sources lumineuses sont montées. Il est relié à une source d’énergie du véhicule permettant l’allumage des sources lumineuses, notamment pour créer un éclairage dynamique.  The light sources 16 are mounted on at least one support 18 fixed on the reflector 12. It may be a fixing by clipping, screwing, ... This support 18 may for example be a printed circuit on which the light sources are mounted. It is connected to a source of energy of the vehicle for lighting the light sources, in particular to create dynamic lighting.
Le support 18 est souple et a un coefficient de dilatation thermique linéaire particulier, pouvant être égal à 25 pm/m/°C pour un support déformable de façon souple.  The support 18 is flexible and has a particular linear thermal expansion coefficient, which may be equal to 25 pm / m / ° C for a flexibly deformable support.
Le réflecteur 12 comprend des orifices traversant 20 formant des canaux et au moins un plot de fixation 22 au support 18 (le support comprenant des orifices de fixation 24 collaborant avec les plots de fixation, voir figure 9) comme cela est visible sur la figure 3. Le réflecteur 12 comprend autant d’orifices traversant 20 que le support 18 a de sources lumineuses 16. Ces dernières s’étendent à l’intérieur des orifices traversant 20 afin de diffuser de la lumière à travers ces derniers jusqu’au corps principal 6. Comme cela peut être déduit de ce qui précède, le coefficient de dilatation thermique linéaire du réflecteur 12 est supérieur à celui du support 18. Le véhicule automobile 2 pouvant être exposé à des températures allant de -40°C à +85°C, il est possible que la dilatation du réflecteur 12 soit plus importante que celle du support 18. Le réflecteur 12 et le support 18 sont dès lors fixés l’un à l’autre de manière à conserver la coïncidence entre les sources lumineuses 16 et les orifices traversant 20 du réflecteur 18. The reflector 12 comprises through orifices 20 forming channels and at least one attachment stud 22 to the support 18 (the support comprising fixing orifices 24 collaborating with the fixing studs, see FIG. 9) as can be seen in FIG. The reflector 12 comprises as many through-holes 20 as the support 18a of light sources 16. The latter extend inside the through openings 20 in order to diffuse light through them to the main body 6 . As can be deduced from the foregoing, the coefficient of linear thermal expansion of the reflector 12 is greater than that of the support 18. The motor vehicle 2 can be exposed to temperatures ranging from -40 ° C. to + 85 ° C. It is possible that the expansion of the reflector 12 is greater than that of the support 18. The reflector 12 and the support 18 are therefore fixed to each other so as to maintain the coincidence between the light sources 16 and the orifices passing through. 20 of the reflector 18.
Dans ce qui va suivre, des modes de réalisation de l’invention vont être décrits à l’appui de figures comprenant un certain nombre de sources lumineuses 16, de supports 18 ou encore de réflecteurs 12. Leurs nombres respectifs peuvent bien évidemment être différents de ce qui est illustré sur les figures.  In what follows, embodiments of the invention will be described in support of figures comprising a number of light sources 16, supports 18 or reflectors 12. Their respective numbers may of course be different from what is illustrated in the figures.
La figure 4 illustre un premier mode de réalisation de l’invention dans lequel la fixation du réflecteur 12 au support 18 permet de conserver la disposition initiale des différents éléments au sein du dispositif de diffusion de lumière.  FIG. 4 illustrates a first embodiment of the invention in which the fixing of the reflector 12 to the support 18 makes it possible to preserve the initial disposition of the various elements within the light diffusion device.
Dans ce mode de réalisation, le support 18 comprend des portions incurvées 26. Plus particulièrement, le support 18, lorsqu’il est fixé au réflecteur 12, comprend des portions incurvées 26 sur lesquelles des sources lumineuses 16 sont montées. Ces dernières s’étendent au moins partiellement à l’intérieur des orifices traversants 20 du réflecteur 12. Pour se faire, la distance entre deux orifices de fixation 24 présent sur le support 18 est plus importante que la distance entre deux plots de fixation 22 présent sur le réflecteur 12 collaborant avec les deux orifices de fixation. Cela conduit à la formation d’une portion incurvée 26 en regard d’un réflecteur 12 linéaire (ou au moins moins incurvé que la portion 26). Préférentiellement, la distance entre les deux orifices de fixation 24 est au moins égale à la distance maximale entre les deux plots de fixation 22, c’est-à-dire lorsque le réflecteur 12 présente une dilatation maximale.  In this embodiment, the support 18 comprises curved portions 26. More particularly, the support 18, when attached to the reflector 12, comprises curved portions 26 on which light sources 16 are mounted. These latter extend at least partially inside the through orifices 20 of the reflector 12. To do this, the distance between two fixing orifices 24 present on the support 18 is greater than the distance between two fixing studs 22 present. on the reflector 12 collaborating with the two fixing holes. This leads to the formation of a curved portion 26 facing a linear reflector 12 (or at least less curved than the portion 26). Preferably, the distance between the two fixing orifices 24 is at least equal to the maximum distance between the two fixing studs 22, that is to say when the reflector 12 has a maximum expansion.
Ainsi, en cas de dilatation du réflecteur 12, le support 18 est apte à augmenter sa longueur d’une longueur équivalente à celle du réflecteur 12 tout en conservant l’alignement entre les orifices traversant 20 et les sources lumineuses 16. En effet, le réflecteur 12 s’allongeant exerce une contrainte sur le support 18 incurvé qui se tend de plus en plus afin de suivre l’allongement du réflecteur 12. En cas de rétraction du réflecteur 12, par exemple suite à sa dilatation, la portion 26 est apte à s’incurver à nouveau.  Thus, in case of expansion of the reflector 12, the support 18 is able to increase its length by a length equivalent to that of the reflector 12 while maintaining the alignment between the through holes 20 and the light sources 16. In fact, the Reflector 12 elongates exerts a stress on the curved support 18 which is stretched more and more in order to follow the elongation of the reflector 12. In the case of retraction of the reflector 12, for example as a result of its expansion, the portion 26 is suitable to curl again.
Les figures 5 à 8 illustrent un second mode de réalisation de l’invention dans lequel le support 18 comprend également des zones incurvées 28, zones incurvées 28 situées entre des sources lumineuses 16 ou des groupes de sources lumineuses 16. Ce mode de réalisation est compatible avec le premier mode de réalisation.  FIGS. 5 to 8 illustrate a second embodiment of the invention in which the support 18 also comprises curved zones 28, curved zones 28 located between light sources 16 or groups of light sources 16. This embodiment is compatible with FIG. with the first embodiment.
Dans ce mode de réalisation, les sources lumineuses 16 s’étendent à l’intérieur des orifices traversants 20 de la même manière quel que soit la longueur du réflecteur 12. Chaque zone incurvée 28 peut être en regard d’un réflecteur 12 fixé au support 18 de part et d’autre de la zone incurvée 28. Il est possible que plusieurs zones incurvées 28 soient en regard d’un réflecteur 12 fixé au support 18 de part et d’autre des zones incurvées 28. Le support 18 est ici réalisé dans un matériau souple qui est déformable.In this embodiment, the light sources 16 extend inside the through holes 20 in the same manner regardless of the length of the reflector 12. Each curved zone 28 may be facing a reflector 12 fixed to the support 18 on either side of the curved zone 28. It is possible for a plurality of curved zones 28 to face a reflector 12 attached to the support 18 of FIGS. On either side of the curved zones 28. The support 18 is here made of a flexible material which is deformable.
Le principe de fonctionnement est identique à celui du premier mode de réalisation.The operating principle is identical to that of the first embodiment.
En d’autres termes, le support 18 est apte à s’allonger sur une longueur équivalente à celle du réflecteur 12 se dilatant. Cela est rendu possible grâce à la fixation du réflecteur 12 de part et d’autre de la zone incurvée 28 (ou des zones incurvées 28). Le réflecteur 12 s’allongeant exerce une contrainte sur le support 18 ce qui conduit à une mise en tension progressive de la ou des zones incurvées 28. Les zones incurvées 28 peuvent être d’une longueur égale ou supérieure à l’augmentation de longueur maximale du réflecteur 12. In other words, the support 18 is able to lengthen over a length equivalent to that of the reflector 12 expanding. This is made possible by fixing the reflector 12 on either side of the curved area 28 (or curved areas 28). The elongate reflector 12 exerts a stress on the support 18 which leads to a progressive tensioning of the curved zone or zones 28. The curved zones 28 may be of a length equal to or greater than the maximum length increase reflector 12.
Au moment de la fixation du support 18 au réflecteur 12, il est nécessaire de s’assurer que les zones incurvées 28 se forment dans des zones. En cas de rétraction du ou des réflecteurs 12 suite à leur dilatation, il est également nécessaire que les zones incurvées 28 se reforment dans ces mêmes zones déterminées.  At the time of attachment of the support 18 to the reflector 12, it is necessary to ensure that the curved areas 28 are formed in areas. In case of retraction of the reflector (s) 12 following their expansion, it is also necessary for the curved zones 28 to reform in these same determined zones.
Pour ce faire, une première variante du second mode de réalisation de l’invention, illustrée sur les figures 6 et 7, consiste à fixer une ou plusieurs plaques de rigidification 30 apte à empêcher la déformation de la zone ou des zones du support 18 en contact avec lesdites plaques de rigidification 30, déformation ayant lieu lors de la fixation du support 18 au réflecteur 12 et lors d’une rétraction du réflecteur 12. Dans ce cas, seules les zones du support 18 situées entre les plaques de rigidification 30 peuvent s’incurver. Les plaques de rigidification 30 comprennent des éléments de fixation 32 permettant la liaison entre la plaque de rigidification 30 et le réflecteur 12, le support étant intercalé entre les deux.  To do this, a first variant of the second embodiment of the invention, illustrated in FIGS. 6 and 7, consists in fixing one or more stiffening plates 30 capable of preventing the deformation of the zone or zones of the support 18 by contact with said stiffening plates 30, deformation occurring during the attachment of the support 18 to the reflector 12 and during a retraction of the reflector 12. In this case, only the areas of the support 18 located between the stiffening plates 30 can 'curve. The stiffening plates 30 comprise fastening elements 32 allowing the connection between the stiffening plate 30 and the reflector 12, the support being inserted between the two.
Une autre variante, illustrée sur la figure 8 et compatible avec la première variante, consiste à réaliser des encoches 34 de part et d’autre des zones du support 18 destinées à être incurvées. Le support 18 comprend pour chacune de ces zones quatre encoches 34, une première paire placée sur un côté du support 18 et une seconde paire faisant face à la première. Ces encoches 34 peuvent être réalisées lors de la formation du support 18 par déformation ponctuelle de ce dernier ou après celle-ci par excision de matière.  Another variant, illustrated in FIG. 8 and compatible with the first variant, consists in making notches 34 on either side of the support areas 18 intended to be curved. The support 18 comprises for each of these areas four notches 34, a first pair placed on one side of the support 18 and a second pair facing the first. These notches 34 can be made during the formation of the support 18 by point deformation of the latter or after it by excision of material.
Ainsi, on s’assure que les zones incurvées 28, apparaissant lors de la fixation du réflecteur 12 au support 18 ou lors de la rétraction du réflecteur 12 suite à sa dilatation, se forment dans les zones désirées du support 18  Thus, it is ensured that the curved zones 28, appearing during the fixation of the reflector 12 to the support 18 or during the retraction of the reflector 12 following its expansion, are formed in the desired areas of the support 18
La figure 9 représente une variante de l’invention pouvant être mis en oeuvre dans chacun des deux modes de réalisation. Dans cette variante, le dispositif comprend plusieurs réflecteurs 12 fixés au support 18. Chaque réflecteur 12 est fixé au support 18 de manière à être situé à distance du ou des réflecteurs 12 voisins. Dans ce cas de figure, il est particulièrement intéressant de fixer les réflecteurs 12 sur le support 18 de manière à ce que la distance D entre deux réflecteurs 12 voisins soit supérieure à l’augmentation de longueur maximale desdits réflecteurs 12. FIG. 9 represents a variant of the invention that can be implemented in each of the two embodiments. In this variant, the device comprises several reflectors 12 fixed to the support 18. Each reflector 12 is fixed to the support 18 so as to be located at a distance from the reflector or reflectors 12 neighbors. In this case, it is particularly advantageous to fix the reflectors 12 on the support 18 so that the distance D between two adjacent reflectors 12 is greater than the maximum length increase of said reflectors 12.
Ainsi, en cas d’exposition du véhicule à une température entraînant une dilatation des réflecteurs 12, ces derniers sont libres de se dilater le long du support 18 sans que cela n’affecte l’alignement entre les réflecteurs 12 et le support 18, et plus particulièrement le positionnement des sources lumineuses 16 à l’intérieur des orifices traversant 20. A minima, cette liberté de dilatation peut conduire à un changement de position des orifices traversant 20 n’ayant pas d’impact sur la qualité de la diffusion de la lumière émise par les sources lumineuses 16 et traversant le réflecteur 12. De plus, la variation de longueur de chaque réflecteur 12 d’une taille réduite est inférieure à la variation de longueur d’un seul réflecteur d’une taille bien supérieure, dans le cas où il n’y aurait qu’un seul réflecteur 12 pour toute la longueur de la zone lumineuse. Cette variante correspond par conséquent à la création de sous-ensembles sources lumineuses 16/support 18/ réflecteur 12 indépendants les uns des autres.  Thus, in case of exposure of the vehicle to a temperature causing expansion of the reflectors 12, the latter are free to expand along the support 18 without this affecting the alignment between the reflectors 12 and the support 18, and more particularly, the positioning of the light sources 16 inside the through holes 20. At a minimum, this freedom of expansion can lead to a change of position of the through orifices 20 having no impact on the quality of the diffusion of the light emitted by the light sources 16 and passing through the reflector 12. In addition, the variation in length of each reflector 12 of a reduced size is less than the variation in length of a single reflector of a much larger size, in the case where there is only one reflector 12 for the entire length of the light zone. This variant therefore corresponds to the creation of sub-sets of light sources 16 / support 18 / reflector 12 independent of each other.
Il est également à noter que la présence de zones du support 18 non recouvertes par un réflecteur 12 permet, dans le cas de figure dans lequel le support 18 est déformable, d’obtenir un dispositif de diffusion de lumière suivant le galbe d’une pièce de carrosserie et ce sans exercer une contrainte importante sur ce dernier. It should also be noted that the presence of areas of the support 18 not covered by a reflector 12 makes it possible, in the case in which the support 18 is deformable, to obtain a light diffusion device according to the curve of a part bodywork and without exerting a significant constraint on the latter.
Liste des références numériques List of numerical references
2 : véhicule automobile 2: motor vehicle
4 : zones transparentes ou semi-opaques 4: transparent or semi-opaque areas
6 : corps principal  6: main body
8 : face interne du corps principal 8: inner side of the main body
10 : face externe du corps principal 10: outer face of the main body
12 : réflecteur 12: reflector
16 : sources lumineuses 16: light sources
18 : support  18: support
20 : orifices 20: orifices
22 : plot de fixation 22: fixing stud
24 : orifices de fixation 24: fixing holes
26 : portions incurvées comprenant des sources lumineuses26: curved portions including light sources
28 : zones incurvées entre les sources lumineuses 28: curved areas between light sources
30 : plaque de rigidification 30: stiffening plate
32 : élément de fixation 32: fastening element
34 : encoches 34: notches
D : distance entre deux réflecteurs voisins D: distance between two neighboring reflectors

Claims

Revendications claims
1 . Pièce de carrosserie de véhicule automobile caractérisée en ce qu’elle comprend : 1. Motor vehicle body part characterized in that it comprises:
- un corps principal (6) comprenant au moins une zone transparente ou semi- opaque, a main body (6) comprising at least one transparent or semi-opaque zone,
- au moins un support (18) comprenant des sources lumineuses (16) aptes à diffuser de la lumière à travers la zone transparente ou semi-opaque, le support (18) ayant un premier coefficient de dilatation thermique, et  at least one support (18) comprising light sources (16) able to diffuse light through the transparent or semi-opaque zone, the support (18) having a first coefficient of thermal expansion, and
- au moins un réflecteur (12) disposé entre les sources lumineuses (16) et le corps principal (6), le réflecteur (12) présentant des orifices traversant (20) formant des canaux, chacune des sources lumineuses (16) étant apte à diffuser de la lumière à travers un orifice traversant (20), le réflecteur (12) ayant un second coefficient de dilatation thermique supérieur au premier coefficient de dilatation thermique, le support (18) étant apte à se déformer et comprenant au moins une zone plus incurvée qu’une zone du réflecteur (12) lui faisant face. - at least one reflector (12) disposed between the light sources (16) and the main body (6), the reflector (12) having through openings (20) forming channels, each of the light sources (16) being adapted to diffusing light through a through orifice (20), the reflector (12) having a second coefficient of thermal expansion greater than the first coefficient of thermal expansion, the support (18) being able to deform and comprising at least one zone more curved area of the reflector (12) facing it.
2. Pièce de carrosserie selon la revendication 1 , dans laquelle le support (18) comprend plusieurs portions (26) comprenant chacune plusieurs sources lumineuses, chaque portion (26) étant fixée au réflecteur de manière à être plus incurvée que ledit réflecteur (12). Body part according to claim 1, wherein the support (18) comprises several portions (26) each comprising several light sources, each portion (26) being fixed to the reflector so as to be curved more than said reflector (12). .
3. Pièce de carrosserie selon la revendication 2, dans laquelle le réflecteur (12) comprend des plots de fixation (22) et le support (18) comprend des orifices de fixation (24) aptes à coopérer avec les plots de fixation (22), la distance entre deux orifices de fixation (24) présents sur le support (18) étant supérieure à la distance entre deux plots de fixation (22) présents sur le réflecteur (12) et collaborant avec les deux orifices de fixation (24). 3. Body part according to claim 2, wherein the reflector (12) comprises fixing studs (22) and the support (18) comprises fixing holes (24) adapted to cooperate with the fixing studs (22). , the distance between two fixing holes (24) present on the support (18) being greater than the distance between two fixing studs (22) present on the reflector (12) and collaborating with the two fixing holes (24).
4. Pièce de carrosserie selon l’une quelconque des revendications précédentes, dans laquelle le support (18) comprend plusieurs portions comprenant chacune plusieurs sources lumineuses (16), le support (18) comprenant entre chaque portion une zone incurvée (28) plus incurvée que les portions comprenant les sources lumineuses. 4. Bodywork part according to any one of the preceding claims, wherein the support (18) comprises a plurality of portions each comprising a plurality of light sources (16), the support (18) comprising between each portion a curved area (28) more curved than the portions comprising the light sources.
5. Pièce de carrosserie selon la revendication 4, dans laquelle une plaque de rigidification (30) est fixée sur chaque portion du support (18). 5. Bodywork part according to claim 4, wherein a stiffening plate (30) is fixed on each portion of the support (18).
6. Pièce de carrosserie selon l’une quelconque des revendications 4 et 5, dans laquelle la zone incurvée (28) est délimitée par des encoches (34) réalisées sur les côtés du support (18) de part et d’autre de la zone incurvée (28). 6. Body part according to any one of claims 4 and 5, wherein the curved area (28) is delimited by notches (34) formed on the sides of the support (18) on either side of the zone curved (28).
7. Pièce de carrosserie selon l’une quelconque des revendications précédentes, dans laquelle les sources lumineuses (16) sont des diodes électroluminescentes. 7. Bodywork part according to any one of the preceding claims, wherein the light sources (16) are light emitting diodes.
8. Pièce de carrosserie selon l’une quelconque des revendications précédentes comprenant plusieurs réflecteurs (12), les réflecteurs (12) étant espacés les uns par rapport aux autres le long du support (18). 8. Body part according to any one of the preceding claims comprising a plurality of reflectors (12), the reflectors (12) being spaced apart from one another along the support (18).
9. Pièce de carrosserie selon la revendication 8, dans laquelle la distance entre deux réflecteurs (12) voisins est supérieure à l’augmentation de longueur maximale desdits réflecteur (12). Body part according to claim 8, wherein the distance between two adjacent reflectors (12) is greater than the maximum length increase of said reflector (12).
PCT/EP2019/062853 2018-05-18 2019-05-17 Bodywork part comprising a device for a lighting signature comprising an incurved support WO2019219935A1 (en)

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FR1854191 2018-05-18
FR1854191A FR3081130A1 (en) 2018-05-18 2018-05-18 BODY PIECE COMPRISING A DEVICE FOR A LIGHT SIGNATURE INCLUDING A CURVED SUPPORT

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