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EP3243024B1 - Optical module for vehicle headlight - Google Patents

Optical module for vehicle headlight Download PDF

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Publication number
EP3243024B1
EP3243024B1 EP16700194.0A EP16700194A EP3243024B1 EP 3243024 B1 EP3243024 B1 EP 3243024B1 EP 16700194 A EP16700194 A EP 16700194A EP 3243024 B1 EP3243024 B1 EP 3243024B1
Authority
EP
European Patent Office
Prior art keywords
optical module
radiator
module according
fan
housing
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
EP16700194.0A
Other languages
German (de)
French (fr)
Other versions
EP3243024A1 (en
Inventor
Nicolas RUCKEBUSCH
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3243024A1 publication Critical patent/EP3243024A1/en
Application granted granted Critical
Publication of EP3243024B1 publication Critical patent/EP3243024B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/49—Attachment of the cooling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to an optical module for a vehicle headlamp.
  • Such an optical module operates with a light source having the disadvantage of emitting heat. It is therefore equipped with a radiator for absorbing this heat, so as to maintain the temperature of said module at a relatively low level. In this way, the operation of the optical module is not affected by too high a temperature.
  • This type of module has already been patented.
  • This module includes a radiator able to blow air cooled to the light source.
  • An optical module according to the invention implements a fan / radiator assembly, which is easy and quick to assemble and disassemble, is compact and has a reduced cost.
  • the invention relates to an optical module comprising a radiator comprising one or more heat-dissipating surfaces, a fan capable of sending air to the heat-dissipating surface or surfaces, and a light source supported by said radiator.
  • the main characteristic of an optical module according to the invention is that the radiator is formed with folded sheet, the fan being fixed to said radiator by fastening means made in said folded sheet.
  • the fastening means are of small thickness, have a good mechanical strength and may have a certain ability to elastic deformation. All these structural and functional features are particularly suitable for fixing the fan on the radiator.
  • such a fixing configuration is freed from the implementation of additional parts, often expensive and bulky, and specifically designed for fixing the fan on said radiator. This results in a gain economic and space saving often sought in a motor vehicle.
  • a folded sheet has the advantage of being easily and quickly machined, to obtain fastening means of variable geometry and size, adapted to the characteristics of the fan and radiator considered.
  • Each heat-dissipating surface may, for example, be represented by a fin or a pin.
  • the folded sheet forms a casing surrounding the heat dissipating surface or surfaces.
  • the folded sheet forms a fin, or several fins interconnected and separated by the folds or the curvatures of said sheet, the fins or fins forming the heat dissipating surface or surfaces.
  • the fins and the housing form a single piece formed by said folded sheet
  • the fan is attached to the radiator by clipping.
  • the attachment of the fan to the radiator is easy and fast because it does not require specific tools or complicated handling requiring precision and rigor.
  • the fan can be removed at any time from the radiator as simply and quickly as when mounted on said radiator.
  • the heat-dissipating surfaces and the housing form two distinct parts.
  • the fixing means are made in the housing of the radiator.
  • the folded sheet forms a fin, or several fins connected to one another and separated by the folds or curvatures of said sheet, the fins forming the heat-dissipating surface or surfaces, the fixing means being made in the fins of the radiator.
  • the fixing means comprise at least two resiliently deformable fastening tabs.
  • the housing, the heat dissipating surfaces and the fixing means are made of aluminum.
  • the aluminum is 99% pure.
  • the fan comprises complementary fastening means adapted to cooperate with the radiator fastening means.
  • the light source comprises at least one electroluminescent diode.
  • a light-emitting diode is a powerful light source in terms of light intensity produced, while remaining of a small footprint.
  • the fan is attached to the radiator by means of a sliding of said fan along said radiator and a lock made with the radiator fastening means.
  • a light module according to the invention for which the fan is fixed laterally on the radiator.
  • the sliding is effected by means of an interaction between two grooves and two rails, said two grooves belonging to one of the two elements constituted by the radiator and the fan and said two rails belonging to the other element.
  • the grooves are introduced into the rails and slide along them until the fan has reached its final fixing position.
  • the rails are folded portions of said folded sheet.
  • the subject of the invention is a vehicle headlight comprising at least one optical module according to the invention.
  • a light module according to the invention is particularly suitable for use in a vehicle headlight, and more particularly in a motor vehicle headlight.
  • An optical module according to the invention has the advantage of being flexible in use and maintenance, because the fan can be attached to the radiator quickly and easily, and can be removed at any time easily . It also has the advantage of being efficient in terms of temperature regulation, insofar as the radiator is made of folded sheet metal, with pure aluminum having good thermal conduction.
  • an optical module 1 constitutes an elongated element, and comprises schematically two light-emitting diodes 2, 3, two reflecting surfaces 4, 5, an exit diopter 6 and a cooling device having a fan 7 and a radiator 8.
  • the two diodes 2, 3 are placed on a support piece 9 flat and thin, secured to the radiator 8. More specifically, this support part 9 comprises two flat surfaces 10, 11 and parallel, a diode 2, 3 being fixed on each of said surfaces 10, 11.
  • Each reflective diopter 4, 5 is curved and is located opposite a diode 2, 3 so as to reflect the light beams from said diode 2, 3 to the output diopter 6.
  • the device cooling is placed behind the diodes 2, 3 with respect to 6 diopter output. In other words, the diodes 2, 3 are placed between the output dioptre 6 and the assembly formed by the fan 7 and the radiator 8.
  • the cooling device, the diodes 2, 3 and the output diopter 6 are aligned in a longitudinal axis of the optical module 1.
  • the radiator 8 comprises a housing 12 and a network of fins 13 of aluminum.
  • the housing 12 is delimited by four side walls 14, 15, 16, 17 and a bottom 18, two successive walls forming between them an angle of 90 °.
  • the walls 14, 15, 16, 17 and the bottom 18 are planar, said bottom 18 being perpendicular to each of said walls 14, 15, 16, 17.
  • each of said lugs 19, 20 having three segments 21, 22, 23 and two elbows.
  • These two tabs 19, 20 emerge on the same side of the two walls 14, 15 on which they are implanted, said side being opposite to that at which the bottom 18 is located. In this way, each tab 19, 20 extends into a direction which is opposed to that where the bottom 18 is located.
  • the first segment 21 extends in the same plane the wall 14, from which it emerges, the second segment 22 extends said first segment 21, and has a tendency to extend towards the center of the housing 13.
  • the third segment 23 extends said second segment 22 by being slightly inclined relative to the first segment 21 and tends to extend outwardly of said housing 12, the two elbows being situated between said three segments 21, 22, 23.
  • the third segments 23 of the two tabs 19, 20 facing one another, define between them a space which is gradually reduced in approaching the bottom 18 of the housing 12.
  • Two positioning tabs 24, 25, 2 6, 27 frame each of the two clipping lugs 19, 20, each of said positioning tabs 24, 25, 26, 27 consisting of a flat wall of small thickness, extending in the same plane the side wall 14, 15 of the housing 12 from which it emerges, and projecting in the same direction as that of the clipping lug 19, 20.
  • the other two parallel side walls 16, 17 of the housing 12 also have legs 28, 29, 30 having different lengths along said walls 16, 17.
  • the various positioning tabs 24, 25, 26, 27, 28, 29, 30 are intended to delimit a space of the radiator 8 intended to receive the fan 7.
  • the fins 13 of the radiator 8 are all the same length and are arranged in said radiator 8 being parallel to each other. They are further aligned with each other, two successive fins 13 being connected to each other by means of a segment 31 bent at 180 °. In other words, each fin 13 is extended at its ends by bent segments 31 in opposite directions.
  • the fins 13 being machined into sheets, can be made with 99% pure aluminum thus enabling high performance thermal conduction, in particular to cool the optical module 1.
  • the fins 13 of the radiator 8 constitute a single piece, housed in the housing 12 of the radiator 8 remaining fully included in said housing 12, without emerging thereof.
  • the housing 12 is provided with perforated fastening elements 32, parallel to the bottom 18 of said housing 12, to allow attachment, for example by screwing it onto the flat support part 9 of the optical module 1.
  • the fin array 13 and the housing 12 constitute a single piece made of folded aluminum sheet.
  • the fan 7 is brought above the radiator 8, consisting of the housing 12 and the fins 13, said radiator 8 being fixed to the flat support part 9 of the optical module 1.
  • the fan 7 is then moved in translation from top to bottom, as indicates the arrow 34, to be fixed on said radiator 8.
  • the fan 7 then passes between the third segments 23 of the two lugs 19, 20 of clipping, causing a temporary spacing of said two legs 19, 20.
  • the stroke of the fan 7 to the radiator 8 continues, until the upper part of said fan 7 has crossed the second segments 22 of said tabs 19, 20.
  • the clipping lugs 19, 20 then close on the fan 7 while relaxing to find their rest position.
  • the fin array 13 and the housing 12 constitute two separate parts made of folded aluminum sheet.
  • the part materializing the network of fins 13 is then introduced into the housing 12 to form the radiator 8.
  • the fan 7 is then attached to the radiator 8 according to the same principle as that used for the first preferred embodiment described above. .
  • the fan 7 can be fixed, either by the top of the radiator 8 as is the case for the first two preferred embodiments described above. but laterally by means of sliding on said radiator 8.
  • This lateral sliding is implemented by means of an interaction between two parallel projecting grooves and two parallel rails, said grooves belonging to one of the two elements constituted by the fan 7 and the radiator 8, and said two rails belonging to the other element.
  • the grooves are introduced into the rails, and the fan 7 slides laterally on the radiator 8 by creating an extra thickness corresponds approximately to the total thickness of said fan.
  • the fan 7 is locked on said radiator 8 by clipping.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Description

L'invention se rapporte à un module optique pour projecteur de véhicule.The invention relates to an optical module for a vehicle headlamp.

Généralement un tel module optique fonctionne avec une source lumineuse présentant l'inconvénient d'émettre de la chaleur. Il est donc équipé d'un radiateur permettant d'absorber cette chaleur, de manière à maintenir la température dudit module à un niveau relativement bas. De cette manière, le fonctionnement du module optique n'est pas affecté par une température trop élevée.Generally such an optical module operates with a light source having the disadvantage of emitting heat. It is therefore equipped with a radiator for absorbing this heat, so as to maintain the temperature of said module at a relatively low level. In this way, the operation of the optical module is not affected by too high a temperature.

Ce type de module a déjà fait l'objet de brevets. On peut, par exemple, citer la demande de brevet EP2138759 se rapportant à un module optique dont la particularité est de posséder une source lumineuse fondée sur un dispositif d'émission de lumière semi-conducteur. Ce module comprend un radiateur apte à souffler de l'air refroidi vers la source lumineuse.This type of module has already been patented. One can, for example, quote the patent application EP2138759 relating to an optical module whose particularity is to have a light source based on a semiconductor light emitting device. This module includes a radiator able to blow air cooled to the light source.

Un module optique selon l'invention met en oeuvre un ensemble ventilateur/radiateur, qui est facile et rapide à monter et à démonter, qui est peu encombrant et est d'un coût réduit.An optical module according to the invention implements a fan / radiator assembly, which is easy and quick to assemble and disassemble, is compact and has a reduced cost.

L'invention a pour objet un module optique comprenant un radiateur comportant une ou plusieurs surfaces dissipatrices de chaleur, un ventilateur apte à envoyer de l'air sur la ou lesdites surfaces dissipatrices de chaleur, et une source lumineuse supportée par ledit radiateur.The invention relates to an optical module comprising a radiator comprising one or more heat-dissipating surfaces, a fan capable of sending air to the heat-dissipating surface or surfaces, and a light source supported by said radiator.

La principale caractéristique d'un module optique selon l'invention, est que le radiateur est formé avec de la tôle pliée, le ventilateur étant fixé audit radiateur par des moyens de fixation réalisés dans ladite tôle pliée. De cette manière, les moyens de fixation sont de faible épaisseur, ont une bonne tenue mécanique et peuvent présenter une certaine aptitude à la déformation élastique. Toutes ces caractéristiques structurelles et fonctionnelles sont particulièrement adaptées à la fixation du ventilateur sur le radiateur. De plus, une telle configuration de fixation s'affranchit de la mise en oeuvre de pièces supplémentaires, souvent onéreuses et encombrantes, et spécifiquement conçues pour la fixation du ventilateur sur ledit radiateur. Il en résulte un gain économique et un gain de place souvent recherchés dans un véhicule automobile. Une tôle pliée présente l'avantage de pouvoir être facilement et rapidement usinée, pour obtenir des moyens de fixation de géométrie et de taille variables, adaptées aux caractéristiques du ventilateur et du radiateur considérés. Chaque surface dissipatrice de chaleur peut, par exemple, être représentée par une ailette ou un picot.The main characteristic of an optical module according to the invention is that the radiator is formed with folded sheet, the fan being fixed to said radiator by fastening means made in said folded sheet. In this way, the fastening means are of small thickness, have a good mechanical strength and may have a certain ability to elastic deformation. All these structural and functional features are particularly suitable for fixing the fan on the radiator. In addition, such a fixing configuration is freed from the implementation of additional parts, often expensive and bulky, and specifically designed for fixing the fan on said radiator. This results in a gain economic and space saving often sought in a motor vehicle. A folded sheet has the advantage of being easily and quickly machined, to obtain fastening means of variable geometry and size, adapted to the characteristics of the fan and radiator considered. Each heat-dissipating surface may, for example, be represented by a fin or a pin.

Avantageusement, la tôle pliée forme un boîtier entourant la ou lesdites surfaces dissipatrices de chaleur.Advantageously, the folded sheet forms a casing surrounding the heat dissipating surface or surfaces.

De façon préférentielle, la tôle pliée forme une ailette, ou plusieurs ailettes reliées entre elles et séparées par les plis ou les courbures de ladite tôle, la ou les ailettes formant la ou les surfaces dissipatrices de chaleur.Preferably, the folded sheet forms a fin, or several fins interconnected and separated by the folds or the curvatures of said sheet, the fins or fins forming the heat dissipating surface or surfaces.

Préférentiellement, les ailettes et le boitier forment une seule pièce formée par ladite tôle pliée
Avantageusement, le ventilateur est fixé au radiateur par clippage. De cette manière, la fixation du ventilateur au radiateur est facile et rapide, car elle ne nécessite ni un outillage spécifique ni une manipulation compliquée requérant de la précision et de la rigueur. De plus, le ventilateur peut être retiré à tout moment du radiateur de façon aussi simple et rapide que lors de son montage sur ledit radiateur.Preferably, the fins and the housing form a single piece formed by said folded sheet
Advantageously, the fan is attached to the radiator by clipping. In this way, the attachment of the fan to the radiator is easy and fast because it does not require specific tools or complicated handling requiring precision and rigor. In addition, the fan can be removed at any time from the radiator as simply and quickly as when mounted on said radiator.

De façon avantageuse, les surfaces dissipatrices de chaleur et le boitier forment deux pièces distinctes.Advantageously, the heat-dissipating surfaces and the housing form two distinct parts.

De façon avantageuse, les moyens de fixation sont réalisés dans le boitier du radiateur.Advantageously, the fixing means are made in the housing of the radiator.

Préférentiellement, la tôle pliée forme une ailette, ou plusieurs ailettes reliées entre elle et séparées par les plis ou les courbures de ladite tôle, la ou les ailettes formant la ou les surfaces dissipatrices de chaleur, les moyens de fixation étant réalisés dans les ailettes du radiateur.Preferably, the folded sheet forms a fin, or several fins connected to one another and separated by the folds or curvatures of said sheet, the fins forming the heat-dissipating surface or surfaces, the fixing means being made in the fins of the radiator.

Préférentiellement, les moyens de fixation comprennent au moins deux pattes de fixation déformables élastiquement.Preferably, the fixing means comprise at least two resiliently deformable fastening tabs.

De façon avantageuse, le boitier, les surfaces dissipatrices de chaleur et les moyens de fixation sont réalisés en aluminium. De façon préférentielle, l'aluminium est pur à 99%.Advantageously, the housing, the heat dissipating surfaces and the fixing means are made of aluminum. Preferably, the aluminum is 99% pure.

Avantageusement, le ventilateur comprend des moyens de fixation complémentaires aptes à coopérer avec les moyens de fixation du radiateur.Advantageously, the fan comprises complementary fastening means adapted to cooperate with the radiator fastening means.

De façon préférentielle, la source lumineuse comprend au moins une diode électroluminescente. Une diode électroluminescente constitue une source lumineuse performante en matière d'intensité lumineuse produite, tout en demeurant d'un encombrement réduit.Preferably, the light source comprises at least one electroluminescent diode. A light-emitting diode is a powerful light source in terms of light intensity produced, while remaining of a small footprint.

Préférentiellement, le ventilateur vient se fixer au radiateur au moyen d'un coulissement dudit ventilateur le long dudit radiateur puis d'un verrouillage réalisé avec les moyens de fixation du radiateur. Il s'agit d'une variante de réalisation d'un module lumineux selon l'invention, pour laquelle le ventilateur vient se fixer latéralement sur le radiateur.Preferably, the fan is attached to the radiator by means of a sliding of said fan along said radiator and a lock made with the radiator fastening means. This is an alternative embodiment of a light module according to the invention, for which the fan is fixed laterally on the radiator.

De façon avantageuse, le coulissement s'effectue par l'intermédiaire d'une interaction entre deux rainures et deux rails, lesdites deux rainures appartenant à l'un des deux éléments constitués par le radiateur et le ventilateur et lesdits deux rails appartenant à l'autre élément. Autrement dit, si les deux rails appartiennent au ventilateur, alors les rainures appartiennent au radiateur, et vice versa. Les rainures sont introduites dans les rails et coulissent le long de ceux-ci jusqu'à ce que le ventilateur ait atteint sa position définitive de fixation.Advantageously, the sliding is effected by means of an interaction between two grooves and two rails, said two grooves belonging to one of the two elements constituted by the radiator and the fan and said two rails belonging to the other element. In other words, if both rails belong to the fan, then the grooves belong to the radiator, and vice versa. The grooves are introduced into the rails and slide along them until the fan has reached its final fixing position.

Avantageusement, les rails sont des portions repliées de ladite tôle pliée.Advantageously, the rails are folded portions of said folded sheet.

L'invention a pour deuxième objet un projecteur de véhicule comprenant au moins un module optique conforme à l'invention. En effet, un module lumineux selon l'invention est particulièrement adapté pour être utilisé dans un projecteur de véhicule, et plus particulièrement dans un projecteur de véhicule automobile.The subject of the invention is a vehicle headlight comprising at least one optical module according to the invention. Indeed, a light module according to the invention is particularly suitable for use in a vehicle headlight, and more particularly in a motor vehicle headlight.

Un module optique selon l'invention présente l'avantage d'être souple d'utilisation et de maintenance, car le ventilateur peut venir se fixer sur le radiateur de façon simple et rapide, et peut être retiré à tout moment de façon tout aussi aisée. Il a de plus l'avantage d'être performant en matière de régulation de la température, dans la mesure où le radiateur est réalisé en tôle pliée, avec de l'aluminium pur ayant une bonne conduction thermique.An optical module according to the invention has the advantage of being flexible in use and maintenance, because the fan can be attached to the radiator quickly and easily, and can be removed at any time easily . It also has the advantage of being efficient in terms of temperature regulation, insofar as the radiator is made of folded sheet metal, with pure aluminum having good thermal conduction.

On donne, ci-après, une description détaillée de deux modes de réalisation préférés d'un module optique selon l'invention, en se référant aux figures 1 à 6.

  • La figure 1 est une vue en perspective d'un module optique selon l'invention, le ventilateur étant détaché dudit module,
  • la figure 2 est une vue en coupe du module de la figure 1,
  • la figure 3 est une vue en perspective d'un radiateur d'un module optique selon l'invention,
  • la figure 4 est une vue du dessus du radiateur de la figure 3,
  • la figure 5 est une vue en éclaté d'une partie d'un premier mode de réalisation préféré d'un module optique selon l'invention,
  • la figure 6 est une vue en éclaté d'une partie d'un deuxième mode de réalisation préféré d'un module optique selon l'invention,
The following is a detailed description of two preferred embodiments of an optical module according to the invention, with reference to the Figures 1 to 6 .
  • The figure 1 is a perspective view of an optical module according to the invention, the fan being detached from said module,
  • the figure 2 is a sectional view of the module of the figure 1 ,
  • the figure 3 is a perspective view of a radiator of an optical module according to the invention,
  • the figure 4 is a top view of the radiator of the figure 3 ,
  • the figure 5 is an exploded view of part of a first preferred embodiment of an optical module according to the invention,
  • the figure 6 is an exploded view of part of a second preferred embodiment of an optical module according to the invention,

En se référant aux figures 1 et 2, un module optique 1 selon l'invention constitue un élément allongé, et comprend schématiquement deux diodes électroluminescentes 2, 3, deux surfaces réfléchissantes 4, 5, un dioptre de sortie 6 et un dispositif de refroidissement possédant un ventilateur 7 et un radiateur 8. Les deux diodes 2, 3 sont placées sur une pièce support 9 plane et de faible épaisseur, solidarisée au radiateur 8. Plus précisément, cette pièce support 9 comporte deux surfaces planes 10, 11 et parallèles, une diode 2, 3 étant fixée sur chacune desdits surfaces 10, 11. Chaque dioptre réfléchissant 4, 5 est incurvé et est situé en regard d'une diode 2, 3 de manière à réfléchir les faisceaux lumineux issus de ladite diode 2, 3 vers le dioptre de sortie 6. Le dispositif de refroidissement est placé derrière les diodes 2, 3 par rapport au dioptre 6 de sortie. Autrement dit, les diodes 2, 3 sont placées entre le dioptre de sortie 6 et l'ensemble formé par le ventilateur 7 et le radiateur 8. Le dispositif de refroidissement, les diodes 2, 3 et le dioptre de sortie 6 sont alignés selon un axe longitudinal du module optique 1.Referring to Figures 1 and 2 an optical module 1 according to the invention constitutes an elongated element, and comprises schematically two light-emitting diodes 2, 3, two reflecting surfaces 4, 5, an exit diopter 6 and a cooling device having a fan 7 and a radiator 8. The two diodes 2, 3 are placed on a support piece 9 flat and thin, secured to the radiator 8. More specifically, this support part 9 comprises two flat surfaces 10, 11 and parallel, a diode 2, 3 being fixed on each of said surfaces 10, 11. Each reflective diopter 4, 5 is curved and is located opposite a diode 2, 3 so as to reflect the light beams from said diode 2, 3 to the output diopter 6. The device cooling is placed behind the diodes 2, 3 with respect to 6 diopter output. In other words, the diodes 2, 3 are placed between the output dioptre 6 and the assembly formed by the fan 7 and the radiator 8. The cooling device, the diodes 2, 3 and the output diopter 6 are aligned in a longitudinal axis of the optical module 1.

En se référant aux figures 3 et 4, le radiateur 8 comprend un boitier 12 et un réseau d'ailettes 13 en aluminium. Le boitier 12 est délimité par quatre parois latérales 14, 15, 16, 17 et par un fond 18, deux parois successives faisant entre elles un angle de 90°. Les parois 14, 15, 16, 17 et le fond 18 sont plans, ledit fond 18 étant perpendiculaire à chacune desdites parois 14, 15, 16, 17.Referring to Figures 3 and 4 , the radiator 8 comprises a housing 12 and a network of fins 13 of aluminum. The housing 12 is delimited by four side walls 14, 15, 16, 17 and a bottom 18, two successive walls forming between them an angle of 90 °. The walls 14, 15, 16, 17 and the bottom 18 are planar, said bottom 18 being perpendicular to each of said walls 14, 15, 16, 17.

En se référant aux figures 3 et 5, deux parois 14, 15 parallèles dudit boitier 12 sont prolongées chacune par une patte de clippage 19, 20 déformable élastiquement, chacune desdites pattes 19, 20 présentant trois segments 21, 22, 23 et deux coudes. Ces deux pattes 19, 20 émergent du même coté des deux parois 14, 15 sur lesquelles elles sont implantées, ledit coté étant opposé à celui au niveau duquel est situé le fond 18. De cette manière, chaque patte 19, 20 s'étend dans une direction qui est opposée à celle où est situé le fond 18. Le premier segment 21 prolonge dans le même plan la paroi 14, 15 de laquelle il émerge, le deuxième segment 22 prolonge ledit premier segment 21, et a tendance à s'étendre vers le centre du boitier 13. Le troisième segment 23 prolonge ledit deuxième segment 22 en étant légèrement incliné par rapport au premier segment 21 et a tendance à s'étendre vers l'extérieur dudit boitier 12, les deux coudes étant situés entre lesdits trois segments 21, 22, 23. Les troisièmes segments 23 des deux pattes 19, 20 en regard l'une de l'autre, définissent entre eux un espace qui se réduit progressivement en s'approchant du fond 18 du boitier 12. Deux pattes de positionnement 24, 25, 26, 27 encadrent chacune des deux pattes de clippage 19, 20, chacune desdites pattes de positionnement 24, 25, 26, 27 étant constituée d'une paroi plane de faible épaisseur, prolongeant dans le même plan la paroi latérale 14, 15 du boitier 12 de laquelle elle émerge, et saillant dans le même sens que celui de la patte de clippage 19, 20. Les deux autres parois latérales 16, 17 parallèles du boitier 12 possèdent également des pattes de positionnement 28, 29, 30 ayant des longueurs différentes le long desdites parois 16, 17. Les différentes pattes de positionnement 24, 25, 26, 27, 28, 29, 30 sont destinées à délimiter un espace du radiateur 8 destiné à recevoir le ventilateur 7.Referring to Figures 3 and 5 two parallel walls 14, 15 of said housing 12 are each extended by an elastically deformable clipping lug 19, each of said lugs 19, 20 having three segments 21, 22, 23 and two elbows. These two tabs 19, 20 emerge on the same side of the two walls 14, 15 on which they are implanted, said side being opposite to that at which the bottom 18 is located. In this way, each tab 19, 20 extends into a direction which is opposed to that where the bottom 18 is located. The first segment 21 extends in the same plane the wall 14, from which it emerges, the second segment 22 extends said first segment 21, and has a tendency to extend towards the center of the housing 13. The third segment 23 extends said second segment 22 by being slightly inclined relative to the first segment 21 and tends to extend outwardly of said housing 12, the two elbows being situated between said three segments 21, 22, 23. The third segments 23 of the two tabs 19, 20 facing one another, define between them a space which is gradually reduced in approaching the bottom 18 of the housing 12. Two positioning tabs 24, 25, 2 6, 27 frame each of the two clipping lugs 19, 20, each of said positioning tabs 24, 25, 26, 27 consisting of a flat wall of small thickness, extending in the same plane the side wall 14, 15 of the housing 12 from which it emerges, and projecting in the same direction as that of the clipping lug 19, 20. The other two parallel side walls 16, 17 of the housing 12 also have legs 28, 29, 30 having different lengths along said walls 16, 17. The various positioning tabs 24, 25, 26, 27, 28, 29, 30 are intended to delimit a space of the radiator 8 intended to receive the fan 7.

En se référant aux figures 3 et 4, les ailettes 13 du radiateur 8 ont toutes la même longueur et sont disposées dans ledit radiateur 8 en étant parallèles entre elles. Elles sont de plus alignées les unes sur les autres, deux ailettes 13 successives étant reliées l'une à l'autre au moyen d'un segment 31 coudé à 180°. Autrement dit, chaque ailette 13 est prolongée à ses extrémités par des segments coudés 31 en sens opposé. Les ailettes 13 étant usinées en feuilles, peuvent être réalisées avec de l'aluminium pur à 99% permettant ainsi d'assurer une conduction thermique performante, pour notamment refroidir le module optique 1. Les ailettes 13 du radiateur 8 constituent une pièce monobloc, logée dans le boitier 12 du radiateur 8 en demeurant totalement inclus dans ledit boitier 12, sans émerger de celui-ci. Le boitier 12 est doté d'éléments de fixation ajourés 32, parallèles au fond 18 dudit boitier 12, pour permettre une fixation par exemple par vissage de celui-ci sur la pièce support plane 9 du module optique 1.Referring to Figures 3 and 4 , the fins 13 of the radiator 8 are all the same length and are arranged in said radiator 8 being parallel to each other. They are further aligned with each other, two successive fins 13 being connected to each other by means of a segment 31 bent at 180 °. In other words, each fin 13 is extended at its ends by bent segments 31 in opposite directions. The fins 13 being machined into sheets, can be made with 99% pure aluminum thus enabling high performance thermal conduction, in particular to cool the optical module 1. The fins 13 of the radiator 8 constitute a single piece, housed in the housing 12 of the radiator 8 remaining fully included in said housing 12, without emerging thereof. The housing 12 is provided with perforated fastening elements 32, parallel to the bottom 18 of said housing 12, to allow attachment, for example by screwing it onto the flat support part 9 of the optical module 1.

En se référant à la figure 5, selon un premier mode de réalisation préféré d'un module optique 1 selon l'invention le réseau d'ailettes 13 et le boitier 12 constituent une même pièce réalisée en tôle d'aluminium pliée. Le ventilateur 7 est amené au dessus du radiateur 8, constitué du boitier 12 et des ailettes 13, ledit radiateur 8 étant fixé à la pièce support plane 9 du module optique 1. Le ventilateur 7 est alors déplacé en translation de haut en bas, comme l'indique la flèche 34, pour venir se fixer sur ledit radiateur 8. Le ventilateur 7 passe alors entre les troisièmes segments 23 des deux pattes 19, 20 de clippage, provoquant un écartement temporaire desdites deux pattes 19, 20. La course du ventilateur 7 vers le radiateur 8 se poursuit, jusqu'à ce que la partie supérieure dudit ventilateur 7 ait franchi les deuxièmes segments 22 desdites pattes 19, 20. Les pattes de clippage 19, 20 se referment alors sur le ventilateur 7 en se relaxant pour retrouver leur position de repos.Referring to the figure 5 , according to a first preferred embodiment of an optical module 1 according to the invention the fin array 13 and the housing 12 constitute a single piece made of folded aluminum sheet. The fan 7 is brought above the radiator 8, consisting of the housing 12 and the fins 13, said radiator 8 being fixed to the flat support part 9 of the optical module 1. The fan 7 is then moved in translation from top to bottom, as indicates the arrow 34, to be fixed on said radiator 8. The fan 7 then passes between the third segments 23 of the two lugs 19, 20 of clipping, causing a temporary spacing of said two legs 19, 20. The stroke of the fan 7 to the radiator 8 continues, until the upper part of said fan 7 has crossed the second segments 22 of said tabs 19, 20. The clipping lugs 19, 20 then close on the fan 7 while relaxing to find their rest position.

En se référant à la figure 6, selon un deuxième mode de réalisation préféré d'un module optique 1 selon l'invention, le réseau d'ailettes 13 et le boitier 12 constituent deux pièces distinctes réalisées en tôle d'aluminium pliée. La pièce matérialisant le réseau d'ailettes 13 est alors préalablement introduite dans le boitier 12 pour former le radiateur 8. Le ventilateur 7 est ensuite fixé au radiateur 8 selon le même principe que celui utilisé pour le premier mode de réalisation préféré décrit ci-dessus.Referring to the figure 6 , according to a second preferred embodiment of an optical module 1 according to the invention, the fin array 13 and the housing 12 constitute two separate parts made of folded aluminum sheet. The part materializing the network of fins 13 is then introduced into the housing 12 to form the radiator 8. The fan 7 is then attached to the radiator 8 according to the same principle as that used for the first preferred embodiment described above. .

Selon un troisième mode de réalisation préféré d'un module optique 1selon l'invention, le ventilateur 7 peut venir se fixer, non plus par le dessus du radiateur 8 comme cela est le cas pour les deux premiers modes de réalisation préférés décrits ci-avant, mais latéralement au moyen d'un coulissement sur ledit radiateur 8. Ce coulissement latéral est mis en oeuvre au moyen d'une interaction entre deux rainures saillantes parallèles et deux rails parallèles, lesdites rainures appartenant à l'un des deux éléments constitués par le ventilateur 7 et le radiateur 8, et lesdits deux rails appartenant à l'autre élément. Les rainures sont introduites dans les rails, et le ventilateur 7 coulisse latéralement sur le radiateur 8 en créant une surépaisseur correspond approximativement à l'épaisseur totale dudit ventilateur. En bout de course, le ventilateur 7 est verrouillé sur ledit radiateur 8 par clippage.According to a third preferred embodiment of an optical module 1 according to the invention, the fan 7 can be fixed, either by the top of the radiator 8 as is the case for the first two preferred embodiments described above. but laterally by means of sliding on said radiator 8. This lateral sliding is implemented by means of an interaction between two parallel projecting grooves and two parallel rails, said grooves belonging to one of the two elements constituted by the fan 7 and the radiator 8, and said two rails belonging to the other element. The grooves are introduced into the rails, and the fan 7 slides laterally on the radiator 8 by creating an extra thickness corresponds approximately to the total thickness of said fan. At the end of the stroke, the fan 7 is locked on said radiator 8 by clipping.

Claims (16)

  1. Optical module (1) comprising a radiator (8) comprising one or more heat dissipation surfaces (13), a fan (7) capable of conveying air onto said heat dissipation surface(s) (13), and a light source (2, 3) supported by said radiator (8), the radiator (8) being formed from folded metal sheets, characterized in that the fan (7) is secured to said radiator (8) by securing means (19, 20) provided in said folded metal sheet.
  2. Optical module according to Claim 1, characterized in that folded sheet metal forms a housing (12) surrounding said heat dissipation surface(s) (13).
  3. Optical module according to one of Claims 1 to 2, characterized in that the folded sheet metal forms a fin, or a plurality of fins, (13) connected together and separated by the folds or the curves of said metal sheet, the fin(s) forming the heat dissipation surface(s).
  4. Optical module according to Claims 2 and 3, characterized in that the fins (13) and the housing (12) form a single component formed by said folded metal sheets.
  5. Optical module according to any one of Claims 1 to 4, characterized in that the fan (7) is secured to the radiator (8) by clipping.
  6. Optical module according to Claim 2, characterized in that the heat dissipation surfaces (13) and the housing (12) form two distinct components.
  7. Optical module according to any one of Claims 1 to 6, characterized in that the securing means are provided in the housing (12) of the radiator (8).
  8. Optical module according to any one of Claims 1 to 7, characterized in that the folded sheet metal forms a fin, or a plurality of fins, (13) connected together and separated by the folds or the curves of said metal sheet, the fin(s) forming the heat dissipation surface (s), and in that the securing means are provided in the fins (13) of the radiator (8).
  9. Optical module according to any one of Claims 1 to 8, characterized in that the securing means comprise at least two elastically deformable securing tabs (19, 20).
  10. Optical module according to any one of Claims 1 to 9, characterized in that the housing (12), the heat dissipation surfaces (13) and the securing means (19, 20) are made from aluminum.
  11. Optical module according to any one of Claims 1 to 10, characterized in that the fan (7) comprises complementary securing means capable of interacting with the securing means (19, 20) of the radiator (8).
  12. Optical module according to any one of Claims 1 to 11, characterized in that the light source comprises at least one electroluminescent diode (2, 3).
  13. Optical module according to any one of Claims 1 to 12, characterized in that the fan (7) is secured to the radiator (8) by means of a sliding of said fan (7) along said radiator (8) then a locking achieved with the securing means of the radiator (8) .
  14. Optical module according to Claim 13, characterized in that the sliding is effected by means of an interaction between two grooves and two rails, said two grooves belonging to one of the two elements constituted by the radiator (8) and the fan (7) and said two rails belonging to the other element (7, 8).
  15. Optical module according to Claim 14, characterized in that the rails are folded back portions of said folded metal sheet.
  16. Vehicle headlight comprising at least one optical module (1) according to any one of Claims 1 to 15.
EP16700194.0A 2015-01-09 2016-01-08 Optical module for vehicle headlight Active EP3243024B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1550173A FR3031572B1 (en) 2015-01-09 2015-01-09 OPTICAL MODULE FOR VEHICLE PROJECTOR
PCT/EP2016/050288 WO2016110573A1 (en) 2015-01-09 2016-01-08 Optical module for vehicle headlight

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EP3243024A1 EP3243024A1 (en) 2017-11-15
EP3243024B1 true EP3243024B1 (en) 2018-12-05

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EP16700194.0A Active EP3243024B1 (en) 2015-01-09 2016-01-08 Optical module for vehicle headlight

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US (1) US9958129B2 (en)
EP (1) EP3243024B1 (en)
JP (1) JP6797806B2 (en)
KR (1) KR102468165B1 (en)
CN (1) CN107208863A (en)
FR (1) FR3031572B1 (en)
WO (1) WO2016110573A1 (en)

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KR20170103796A (en) 2017-09-13
FR3031572B1 (en) 2018-08-10
JP6797806B2 (en) 2020-12-09
KR102468165B1 (en) 2022-11-16
WO2016110573A1 (en) 2016-07-14
US20170370551A1 (en) 2017-12-28
CN107208863A (en) 2017-09-26
US9958129B2 (en) 2018-05-01
EP3243024A1 (en) 2017-11-15
JP2018501627A (en) 2018-01-18
FR3031572A1 (en) 2016-07-15

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