法国专利FR3046387A1 RETROECRATING CARROSERIE ELEMENT

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专利摘要:
Motor vehicle body element (1) comprising a body (2) formed of a transparent material, arranged conspicuously on a support (3) forming part of the bodywork of the vehicle, one side of which is covered with a coating of semi-transparent decoration (4), characterized in that a diffusing light guide (5) connected to a light source is arranged between the support (3) and the body (2) of the bodywork element.
公开号:FR3046387A1
申请号:FR1563450
申请日:2015-12-30
公开日:2017-07-07
发明作者:Issam Khayat
申请人:Plastic Omnium SA；
IPC主号:

专利说明:

[001] The subject of the invention is a bodywork element of a motor vehicle and more particularly a piece of style intended to contribute to the general exterior appearance of the vehicle.
[002] These style parts or bodywork elements are intended to enhance a line or emphasize a shape in order to reinforce the image that the manufacturer wants to associate with its make or model of vehicle.
[003] For example, the chrome strips running along the side of the vehicle, the sill protectors, the logo of the brand, the door handles hubcaps, the hulls of mirrors are these pieces of style whose design is the subject of special care on the part of the designers of the vehicle. By extension, all parts of the body visible from the outside and participating in the general appearance of the vehicle, such as an opening, a bumper, a grille, can also be considered as bodywork elements or style parts within the scope of the invention.
[004] In order to reinforce the effect produced by these bodywork elements, it has been proposed to place a light source behind the surface of the bodywork element formed of a transparent material, and to modify the transparency of the body element. covering the bodywork element so as to show a luminous effect when the external lighting conditions are insufficient and the light source is activated.
Thus, when the vehicle is illuminated by daylight, the optical device is off, and the appearance of the bodywork element is given by the paint coating forming the outer layer of the bodywork element. When the lighting conditions decrease, the bodywork element appears as a uniformly bright surface.
[006] By activating the lighting device, it is also possible to display particular patterns such as a logo to the manufacturer's mark, or particular figurative elements that remain invisible when the vehicle is illuminated by the light of the day.
[007] Thus, US Pat. No. 5,249,104 describes a light device comprising light sources disposed in cavities formed in a diffusing body whose bottom is equipped with a reflective surface, an upper plate formed of a material dispersant light surmounted by a semi-reflecting mirror, and a transparent body whose outer portion is covered with a non-uniform opaque coating revealing a pattern when the light device is activated. The semi-reflecting mirror obscures the inner part of the device when the room is exposed to daylight.
[008] The publication FR 2 840 269 describes a piece of style, supporting a logo or a monogram, composed of a transparent material, behind which are arranged one or more light sources, and whose outer surface comprises a semi-reflective coating that allows light to pass only in one direction.
[009] However, these light bodywork elements have the disadvantage of having light sources arranged directly in the rear part of the surface forming the skin of the bodywork element. The light sources are then exposed to shocks and external climatic conditions experienced by the bodywork element itself. It is then necessary to provide an encapsulation adapted to ensure the protection of the light source, and a particular optical device for distributing the light uniformly to the outer surface of the body member.
The invention aims to eliminate the disadvantages mentioned above.
The bodywork element of a motor vehicle according to the invention comprises a body formed of a transparent material, arranged conspicuously on a support forming part of the vehicle body, one side of which is covered with a coating of Semi-transparent decoration, The bodywork element is characterized in that a diffusing light guide connected to a light source is disposed between the support and the body of the bodywork element.
In this way, it becomes possible to relocate the light source, and the electrical connection elements that accompany it, in a part of the body located away from external aggression.
By optical guide or light guide means here a transparent or translucent piece having a refractive index higher than the ambient air, inside which light rays move in a controlled manner in a general direction common from a first end of the guide having an input surface near which are disposed one or more light sources, to an output surface from which the light rays emerge. The propagation of the light inside the light guide is done by successive internal reflections of the light rays on the faces of the light guide called internal reflection faces. The exit surface may be formed by the face or section opposite to the entrance face or alternatively by a side face of the light guide.
In the present description, and in a manner known to those skilled in the art, the term "diffusing light guide" means a light guide in which the light exit surface is formed by a lateral face of said light guide. . This surface, which occupies all or part of the surface of the light guide, is generally substantially parallel to the general direction of progression of the light in the light guide. Thus, for a diffusing light guide of circular cross section, such as an optical fiber, the light emerges from the light guide in a substantially radial direction. A diffusing light guide therefore makes it possible to distribute a substantially constant luminous flux at any point on the exit surface of the diffusing portion of the guide.
The realization of a diffusing light guide can use different technologies and known as such. A first technique is to treat the surface of the fiber or light guide considered as the output surface, so as to make it rough. The roughnesses are then so many reflective surfaces allowing part of the light to escape from the light guide to the outside. This technology is inexpensive, and is very effective for diffusing light guides of short length, in practice for lengths less than 3m. It also makes it possible to make diffusing only the part of the light guide used for lighting. Another technology involves doping the material forming the light guide with microscopically sized reflective particles. This technology makes the diffusion of light more uniform.
The bodywork element according to the invention also comprises, in isolation or in combination, the following characteristics: the light guide is formed by a plurality of diffusing optical fibers arranged in a sheet. the diffusing light guide is formed of a plurality of diffusing optical fibers arranged in a strand. the optical fiber strand is surrounded by a sheath formed of a transparent plastic material. the diffusing optical fibers have a diameter of between 250 and 500 micrometers. the diffusing light guide is connected at one of its ends to one or more light sources, offset relative to the bodywork element, and situated on an internal side of the bodywork. the light sources are light-emitting diodes. the semitransparent decor coating is constituted by: a translucent paint having a total thickness of less than 20 micrometers or, o a metal deposit with a thickness of less than 200 nanometers, and preferably less than 100 nanometers, and even more preferably less than 100 nanometers at 75 nanometers or, where a translucent thermoformed film deposited by overmoulding with a thickness of between 175 micrometers and 475 micrometers, the paint layer comprises a primer whose thickness is between 5 and 10 micrometers, a tinted base of which thickness is between 2 and 3 micrometers, and a transparent varnish whose thickness is between 5 and 10 micrometers. the metal deposit is made by physical vapor deposition of a material such as chromium, nickel, gold, silver, or aluminum. the semitransparent decor coating is disposed on the outer face of the body of the body member facing outwardly of the vehicle. * Semi-transparent decorative coating is covered with a transparent or semi-transparent protective coating. the semitransparent decorative coating is disposed on the inner face of the body of the body member facing the interior of the vehicle. a layer of light-emitting material opaque and patterned is interposed between the inner face of the body member body and the diffusing light guide. the layer of opaque material is constituted by: o an opaque paint layer or, o a glued insert, o an insert of the same material as the skin made by bi-injection.
The invention will be better understood in the light of the figures serving as a support for the present description in which:
Figure 1 is a sectional view of a bodywork element according to the invention.
Figure 2 is a sectional view of an alternative embodiment in which the bodywork element comprises a visible pattern when the bodywork element is illuminated.
Figure 3 is a sectional view of a variant in which the body body body and the diffusing light guide form a single piece.
Figure 4 is a sectional view of a body member in which the decorative coating is covered with a transparent protective coating.
Figure 5 is a sectional view of a body member in which the decorative coating is disposed on the inner face of the body.
FIG. 6 represents, in a view from above, the various parts forming the actual bodywork element comprising a light guide formed by a sheet of diffusing optical fibers.
Figure 7 shows the bodywork element when the light device is not activated.
Figure 8 shows the bodywork element when the light device is illuminated.
Figure 9 shows, in top view, the various parts forming the actual bodywork element comprising a light guide formed of diffusing optical fibers forming a strand.
Figure 10 shows the bodywork element when the light device is not activated.
Figure 11 shows the bodywork element when the light device is illuminated.
The bodywork element 1 in section shown in Figure 1 comprises a body 2 on which is deposited a semitransparent decorative coating 4.
The body 2 is made using an amorphous material, transparent to light, such as, for example and not exclusively, polycarbonate (PC), polymethyl methacrylate (PMMA) , Acrylonitrile Butadiene Styrene Translucent (ABS) or Acrilonitrile Styrene Acrylate (ASA), styrene acrilonitrile (SAN), a mixture of Acrilonitrile Styrene Acrylate and Polycarbonate, a mixture of Poolycarbonate and Polyterephthalate Ethylene).
The parts made using these thermoplastic materials can be obtained by injection or molding. The shape of the body is then adapted at will to harmonize with the shape of the body on which, or around which, the body member 1 is disposed. The thickness of the body is not limited, and is determined according to the shape and rigidity of the bodywork element 1 that is sought to achieve; it can vary from a few millimeters to one or even two centimeters.
The body 2 is fixed by means (not shown) on a support 3. The support 3 itself is a part of the bodywork preferably made with an opaque material such as for example a polypropylene loaded such as that which is commonly used in the automotive industry to achieve the opening or the inserts on the body such as the hulls of mirrors. The support 3 can also be confused with the structural part on which the bodywork element 1 is fixed.
A diffusing light guide 5 is interposed between the body 2 and the support 3. The diffusing light guide 5 is arranged in such a way that the outgoing light is emitted in a direction L perpendicular to the plane formed by the light guide. broadcasting.
This diffusing light guide may itself be composed of a thermoplastic material, preferably chosen from the group consisting of amorphous polymers or copolymers such as Polyacrylics, Polyesters, Polycarbonates, Polyethers Sulfones or poly set. epoxy siloxanes and cyclic olefin polymers. Some of these polymers, such as polymethyl methacrylate, have a very pronounced translucent and crystalline appearance, and are known as crystal plastic, particularly sought after for the style effects that they make it possible to obtain.
It will be observed here that some of these materials are identical to the materials that can be selected to form the body of the bodywork element 1. It is then possible to produce a bodywork element in which the body and the guide of light are made of material and are made of the same material doped with microscopically sized reflective particles as shown in Figure 3.
However, these materials may have insufficient impact resistance properties, which has the effect of weakening the bodywork element 1 which is exposed.
Also, preferably, the diffusing light guide 5 is made using optical fibers of small diameter.
These optical fibers may be arranged in layers or strands.
Referring to Figure 6, the fibers 52, whose diameter is between 250 and 500 microns, are arranged in layers, in which the fibers 53 form the son of chains, and are maintained by weft son 53 preferentially translucent. The fibers are arranged so that the outgoing light is emitted in the radial direction.
A tablecloth of this type is offered for sale by the company EF! Lighting (registered trademark) under the references Lightex265, Lightex690, or Lightex 1130.
With reference to FIG. 9, the optical fibers 54 are arranged in a strand and form a cable of given diameter, illustrated by the section A-A. The fibers forming the strand may have a slight twist. Preferably, the strand is surrounded by a sheath 55 of transparent plastic material to maintain the fibers and isolate external aggressions.
The advantage of this solution lies in the fact that the fibers are not very sensitive to shock on the one hand, and that the sheet or the strand can easily comply with various support forms on the other hand. In addition, it is possible to treat the fiber so that it diffuses the light only on the only part of the body part 1 intended to be exposed to the view.
The light source 51 is placed at one end of the fiber bundle. Because of its flexibility, particularly when the fibers are in the form of a strand, the fiber bundle can easily be brought into a region of the body protected from external aggression, offset from the bodywork element 1 itself, and where are disposed the light source 51 and the electrical connections.
The light source 51 is preferably formed by one or more light-emitting diodes, emitting a white or colored light.
Figure 2 illustrates the case in which one seeks to reveal a particular pattern when the light device is activated. For this purpose, a layer of opaque material 6, which does not allow the light to pass, is deposited on the inner face of the support 2. This layer of opaque material 6 filters the light coming from the diffusing light guide and reveals a graphic pattern such as than a logo or a monogram.
The layer of opaque material 6 may be an opaque paint layer in which the pattern is obtained by laser scraping, or a part bonded directly to the inner face of the body 2.
Alternatively, it is also possible to achieve this pattern at the same time as the manufacture of the body, by bi-injection of an insert of opaque material of the same nature as the material used for the body.
The support 3 comprises on its outer face, that is to say on the side of the support looking outside the vehicle and visible from the outside, a semitransparent decorative coating 4 (see Figure 1). ).
The decorative coating 4 has a first aesthetic function which is to give a tint to the body member 1 so that the outer surface of this element integrates with adjacent body parts. The chosen color may be identical to the color of the body parts, or of different color, if one wishes to raise a particular line or profile.
The second function of the decorative coating 4 is to let all or part of the light emitted by the diffusing light guide 5. It is therefore important to choose a thin coating.
[0040] Several technologies are available to fulfill this functionality. It will thus be possible to use a translucent paint, a metallic deposit or a thermoformed translucent film.
For the desired effect, the paint will preferably comprise a primer layer whose thickness is between 5 and 10 microns, a tinted base layer whose thickness is between 2 and 3 microns and a layer of transparent protective varnish, advantageously glossy or satin, the thickness of which is between 5 and 10 micrometers. The total thickness of the paint should not exceed 20 micrometers.
It may also cover the body 2 of the bodywork element with a metal deposit obtained, for example, by the technique of physical vapor deposition, and whose thickness is, depending on the metal used , less than 200 nanometers, and preferably less than 100 nanometers, and even more preferably less than 75 nanometers. The chosen material may be, depending on the desired effect, chromium, nickel, gold, silver, or aluminum.
Another technique is to overmold a translucent colored film having a thickness of between 175 micrometers and 475 micrometers on the outer face of the body 2.
A third function of the decorative coating 4 is to return, as much as possible, the incident light from the external natural lighting so as to hide the internal organs of the bodywork element 1 such as the 5, the logo or the monogram, or the support 3. For this purpose, we preferentially choose coatings of the metallized or glossy type which have the effect of acting as a semi-transparent mirror.
Due to the high sensitivity of the decorative coating 4 to scratches, especially when the decorative coating 4 is a paint or a metal coating, it is possible to deposit a protective coating 7 on the decorative layer like this is shown in Figure 4. This protective coating 7 can be used in a known manner, using a transparent thermoplastic film.
The embodiment variant illustrated in Figure 5 shows the case in which the decorative coating 4 is disposed on the face of the support 2 facing the inner part of the vehicle. This arrangement enhances the protection of the decorative coating. However, it limits the semi-reflecting mirror effect mentioned above. However, it allows to confer a particular depth effect to the decor, which effect can be amplified by varying the transparency or pigmentation of the material used to make the support.
Figure 6 shows all the parts participating in the desired features.
The bodywork element 1 is used here to enhance the line of a door bottom. The support 3 is fixed on a structural part of the body 8. The diffusing light guide 5 is connected at one of its ends to a light source 51, and is inserted between the support 3 and the body 2. A panel 81 completes the lower part of the door bottom. This panel may be of the same color or color different from that which has been retained for the decorative coating of the bodywork element 1.
The assembly of the bodywork element according to the invention can be done by assembling each of the parts as shown in Figure 6, and during which the support 3 is superimposed successively, the light guide diffusing 5 and the body 2.
Another technique may be particularly interesting, wherein the body member 1 is formed by overmolding the diffusing light guide 5 and the body 2 on the support 3. Once this operation is completed, the coating of decor is deposited on the outer face of the body.
FIG. 7 illustrates the case in which the bodywork element 1 is illuminated by the only external light such as daylight.
The entire bottom door gives the outside look a uniform hue.
When the lighting conditions weaken, the light source 51 is activated, and the bodywork element appears as a uniformly illuminated surface. Due to the origin of the light rays, the body element 1 provides a backlight appearance. The pattern 61 is then highlighted as shown in FIG. 8.
Figure 9 shows the same bodywork element as that illustrated in Figure 6 wherein the diffusing light guide 5 is formed by fibers 54 organized in strand and visible in detail on the section A-A.
Figure 10 shows the body element formed of the assembly of the parts of Figure 9 lit in daylight. Its appearance is identical to that shown in FIG. 7. FIG. 11 makes it possible to visualize the luminous effect in the form of a line of light, produced by this same bodywork element when the light source 51 is activated.
In view of the foregoing, the skilled person can adapt the lessons learned in the present description to achieve body elements of varying sizes and functions, while giving these sets the strength and protection required by the severe requirements for the use of a motor vehicle.
NOMENCLATURE 1 Bodywork element.
2 Body.
3 Support.
4 Semi transparent decorative coating 5 Diffuse light guide.
51 Light source.
52 Optical fibers arranged in a sheet.
53 Weft yarn 54 Optical fibers arranged in a strand.
55 Transparent sheath.
6 Opaque material forming a pattern.
61 Pattern 7 Protective coating 8 Body structure part 81 Panel

权利要求:
Claims (15)
[1" id="c-fr-0001]
Motor vehicle body element (1) comprising a body (2) formed of a transparent material, arranged conspicuously on a support (3) forming part of the body of the vehicle, one face of which is covered with a semi-transparent decorative coating (4), characterized in that a diffusing light guide (5) connected to a light source (51) is arranged between the support (3) and the body (2) of the light element bodywork (1).
[2" id="c-fr-0002]
Body element according to claim 1, wherein the diffusing light guide (5) is formed by a plurality of diffusing optical fibers (52) arranged in a web.
[3" id="c-fr-0003]
The bodywork element according to claim 1, wherein the diffusing light guide (5) is formed of a plurality of diffusing optical fibers (54) arranged in a strand.
[4" id="c-fr-0004]
The body member of claim 3, wherein the optical fiber strand is surrounded by a sheath (55) formed of a transparent plastic material.
[5" id="c-fr-0005]
5. Bodywork element according to one of claims 2 to 4, wherein the diffusing optical fibers (52) have a diameter of between 250 and 500 micrometers.
[6" id="c-fr-0006]
6. body element according to one of claims 1 to 5, wherein the diffusing light guide (5) is connected at one of its ends to one or more light sources (51) offset relative to the body element and located on an inner side of the bodywork.
[7" id="c-fr-0007]
The body member of claim 6, wherein the light sources (51) are light emitting diodes.
[8" id="c-fr-0008]
8. body element according to one of claims 1 to 7, wherein the semitransparent decor coating (4) is constituted by: a translucent paint with a total thickness of less than 20 microns or a metal deposit of a thickness less than 200 nanometers, and preferably less than 100 nanometers, and even more preferably less than 75 nanometers or, a thermoformed translucent film deposited by overmolding with a thickness of between 175 micrometers and 475 micrometers.
[9" id="c-fr-0009]
9. Body element according to claim 8 wherein the paint layer comprises a primer whose thickness is between 5 and 10 microns, a tinted base whose thickness is between 2 and 3 microns, and a transparent varnish with the thickness is between 5 and 10 micrometers.
[10" id="c-fr-0010]
10. Body element according to claim 8 wherein the metal deposition is achieved by physical vapor deposition of a material such as chromium, nickel, gold, silver, or aluminum.
[11" id="c-fr-0011]
Body element according to one of Claims 1 to 10, in which the semitransparent decorative coating (4) is arranged on the external face of the body (2) of the bodywork element pointing towards the outside of the vehicle. . *
[12" id="c-fr-0012]
Body element according to claim 11, in which the semi-transparent decorative coating (4) is covered with a transparent or semi-transparent protective coating (7).
[13" id="c-fr-0013]
Bodywork element according to one of Claims 1 to 10, in which the semitransparent decorative coating (4) is arranged on the inside face of the body (2) of the bodywork element facing towards the inside of the vehicle. .
[14" id="c-fr-0014]
Bodywork element according to one of Claims 1 to 13, in which a layer of opaque material (6) which does not allow light to pass through and which forms a pattern (61), is interposed between the internal face of the body (2). of the body member and the diffusing light guide (5).
[15" id="c-fr-0015]
15. Bodywork element according to claim 14 wherein the layer of opaque material (6) is constituted by: an opaque paint layer or, a glued insert, an insert of the same material as the support and made by bi-injection.

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同族专利:

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FR3046387B1|2019-03-22|

引用文献:

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法律状态:
2016-12-26| PLFP| Fee payment|Year of fee payment: 2 |

2017-07-07| PLSC| Search report ready|Effective date: 20170707 |

2017-12-19| PLFP| Fee payment|Year of fee payment: 3 |

2018-12-20| PLFP| Fee payment|Year of fee payment: 4 |

2020-10-16| ST| Notification of lapse|Effective date: 20200914 |

优先权:

申请号 | 申请日 | 专利标题

FR1563450|2015-12-30|

FR1563450A|FR3046387B1|2015-12-30|2015-12-30|RETROECRATING CARROSERIE ELEMENT|FR1563450A| FR3046387B1|2015-12-30|2015-12-30|RETROECRATING CARROSERIE ELEMENT|

EP16826117.0A| EP3397522A1|2015-12-30|2016-12-19|Backlit bodywork element|

CN201680077064.9A| CN108473089A|2015-12-30|2016-12-19|Backlit body component|

US16/067,476| US20190023195A1|2015-12-30|2016-12-19|Backlit Bodywork Element|

PCT/FR2016/053554| WO2017115031A1|2015-12-30|2016-12-19|Backlit bodywork element|

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