EP3438523B1 - Pivotable luminous module for vehicle headlight - Google Patents

Pivotable luminous module for vehicle headlight Download PDF

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Publication number
EP3438523B1
EP3438523B1 EP18186112.1A EP18186112A EP3438523B1 EP 3438523 B1 EP3438523 B1 EP 3438523B1 EP 18186112 A EP18186112 A EP 18186112A EP 3438523 B1 EP3438523 B1 EP 3438523B1
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EP
European Patent Office
Prior art keywords
fins
base
lighting module
fin
light module
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
EP18186112.1A
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German (de)
French (fr)
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EP3438523A1 (en
Inventor
Pascal GARIN
Rémi Letoumelin
Stephane Andre
Thibault MENN
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
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Valeo Vision SAS
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Publication date
Priority claimed from FR1757523A external-priority patent/FR3062461B1/en
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3438523A1 publication Critical patent/EP3438523A1/en
Application granted granted Critical
Publication of EP3438523B1 publication Critical patent/EP3438523B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/657—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by moving 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
    • 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
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device

Definitions

  • the invention relates to the field of lighting and/or signaling devices for motor vehicles. It relates more particularly to a light module intended to be mounted in a motor vehicle headlight, the optical module being pivotable relative to the headlight.
  • Automotive headlights are usually composed of a housing which is closed by a transparent wall through which pass one or more light beams emitted by one or more light modules housed in this headlight housing.
  • a light module mainly comprises a light source and an optical system capable of modifying at least one parameter of the light generated by the light source for the emission of this or these light beams.
  • light-emitting diodes when lit, light-emitting diodes have the disadvantage of producing heat which proves to be harmful to their operation. Indeed, the more a light-emitting diode rises in temperature, the more its luminous flux decreases.
  • the light module is designed to generate a beam requiring high light intensity, such as for low beams, high beams or fog lights, the number of light-emitting diodes and/or the power necessary for their operation is high. Due to the sharp rise in temperature of the light module during use, it is necessary to reduce its temperature to avoid any damage inherent to excessive heat.
  • a heat sink is provided in this module comprising a base carrying the light-emitting diodes on a first face and a heat-dissipating part provided on the face of the base opposite to this. first side.
  • the heat dissipating part can in particular be arranged towards the bottom of the projector housing, that is to say opposite the transparent wall closing the housing.
  • EP 2 218 964 A2 And CN 106 122 873 A disclose light modules generating at least one light beam known from the prior art.
  • the invention fits into this context and it proposes a light module comprising a heat dissipating part arranged so as to significantly reduce the volume occupied by the light module as a whole in order to facilitate its pivoting in a reduced space in a motor vehicle headlight.
  • the invention proposes a light module generating at least one light beam along an optical axis for a motor vehicle, according to claim 1.
  • the light module comprises at least one light source and at least one heat sink configured to dissipate calories generated by the light source, the heat sink comprising at least one base arranged to capture the calories generated by the light source and a dissipation member arranged to dissipate the calories captured by the base outside the light module, the dissipation member comprising a series of fins extending respectively projecting from the base, each fin being defined by a vertex which extends at a distance from the base and which defines the length of this fin, and by two end edges extending between said vertex and said base.
  • the light module is configured to pivot around a first pivot axis and around a second pivot axis, and the series of fins is configured so as to have eccentric fins whose length is less that the length of the fins present in the center of the dissipation member, at least one fin also having at least one bevel at the junction between the top and an end edge.
  • the dissipation member comprises fins, necessary to increase the heat exchange surface and the correct dissipation of heat, the length of which decreases from the center towards the periphery of the series of fins so as to reduce its bulk at the level of opposite edges of the base.
  • length we mean the direction in which the fins move away from the base.
  • the height of a peak is less than the height of the fin at the base of the heat sink.
  • height we mean here the direction in which the tops of the fins extend, parallel to the first pivot axis.
  • the length of the fins varies so that their tops are in a cylindrical shape.
  • the lengths of the fins are such that the vertices are arranged on or inside a circle whose radius is defined substantially by the dimension between the top of the central fin and a pivot axis, the fins being arranged at inside this circle.
  • the length of the fins can decrease constantly when one moves away from the center of the series of parallel fins, or the variation in length can consist of a reduction in length at variable steps, in particular to adapt to the specific thermal constraints of a light module.
  • the invention also relates to a motor vehicle headlight comprising a housing inside which at least one light module described above is mounted so as to be pivotable around two pivot axes.
  • the light module can in particular pivot around a first pivot axis, and this first pivot axis can be confused with an axis of revolution of a cylinder in which the vertices of the series of fins are inscribed.
  • the light module can pivot around a second pivot axis normal or substantially normal to the optical axis and to the first pivot axis of the light module.
  • the beveled edges of the fins are configured to minimize the space necessary in the automotive headlight to allow pivoting of the light module around the second pivot axis.
  • the longitudinal, vertical and transverse directions refer to the motor vehicle comprising a headlight in which a light module according to one aspect of the invention is integrated.
  • a longitudinal direction L corresponds to a direction of advancement of the vehicle and to the direction of the optical axis Ax along which the light rays generated by the light module 1 extend mainly when the light module is in a standard position in the front headlight.
  • a transverse direction T corresponds to a direction perpendicular to this longitudinal direction and which extends horizontally
  • a vertical direction V corresponds to a direction perpendicular to the longitudinal and transverse directions and which extends vertically.
  • the front and rear, left and right, high and low orientations relate respectively to each of the longitudinal, vertical and transverse directions previously described, and are to be considered in relation to the observation position of the driver of a vehicle traveling forward and with reference to the L, V, T trihedron illustrated in the figures.
  • THE figures 1 to 5 illustrate a light module 1, otherwise called an optical module, whose function is to generate and project one or more light beams onto a road.
  • a light module 1 is intended to be installed in a headlight 100, for example front, of a motor vehicle as illustrated in figures 2 to 5 .
  • the projector mentioned here generally comprises a housing 102 closed at the front by a transparent glass 104, the latter being crossed by the light rays created by the light module according to the invention.
  • the shape of the housing 102 has been shown here schematically and it will be understood that the dimensions of this housing can be modified to receive in the interior volume of the projector, delimited by the housing 102 and the transparent glass 104, one or more light modules according to the invention.
  • a light module 1 forms a unitary subassembly, that is to say an object which can fulfill its lighting and/or signaling function without any other contribution than the electrical energy necessary to its ignition.
  • the light module 1 is arranged to form a light beam of a single type, such as a low beam or a main beam.
  • the light module 1 is particularly suitable to create the low beam and high beam.
  • the light module 1 is adapted so that the high beam is the combination of the low beam beam with a complementary beam which illuminates above the low beam beam, the assembly thus forming the low beam. high beam.
  • the trim must be able to be modified by tilting the headlights or light modules inside these headlights, and more particularly by pivoting around a horizontal axis.
  • DBL type function for the English acronym “Dynamic Bending Light”
  • the projection of the light beam in a direction parallel to the direction of travel of the vehicle must be able to be modified in order to 'illuminate the inside of bends when the vehicle is turning, for example, and the light modules must for this purpose be pivotable around a vertical axis.
  • the light module(s) 1 housed inside this headlight are pivotable, that is to say they are mounted on the housing of the projector, or on a structural part integral with this housing.
  • the light module(s) 1 are configured to pivot in the projector, at least between a standard position, as illustrated on the figures 2 And 4 , and in which the optical axis is oriented parallel to the longitudinal direction, in a horizontal plane, in order to essentially illuminate the road scene ahead of the vehicle, and a dynamic position, following a pivot around a first axis pivoting ( Figure 3 ) or around a second pivot axis ( figure 5 ), in order to be able to dynamically illuminate parts of a road scene not sufficiently illuminated by the standard position of the light module(s), by modifying the height of the optical axis Ax using known means, and/or its lateral orientation.
  • At least one light module comprises cooling means configured to present a footprint forming a compromise between the necessary cooling of the module components and the compactness of the projector housing inside which the light module equipped with these cooling means must pivot.
  • the light module 1 comprises at least one light source, here not shown and configured to emit light rays towards the output of the light module along the optical axis Ax, a projection lens 2 arranged at the outlet of the light module 1 so as to be crossed by the light rays emitted by the light source and a heat sink 3 configured to evacuate to the rear of the module, that is to say opposite the projection lens, the calories resulting from operation of the light source.
  • the light module 1 comprises a body 10 configured on the one hand to contain the light rays between the light source(s) and the projection lens 2 and on the other hand to form a mechanical support for each of the components and in particular the projection lens. projection and heat sink.
  • the body 10 comprises means 11 for receiving a frame, not shown here, by means of which rotation around two pivot axes A 1 and A 2 is made possible.
  • the projection lens 2 participates in the formation of the desired light beam, whether it is a low beam type beam or a high beam type beam. As has been specified, the projection lens 2 forms a first longitudinal end of the light module 1, opposite the heat sink 3.
  • the light source(s) may take the form of one or more light-emitting diodes, the operation of which may be disrupted by excessive ambient heat. A compromise must be found between the size of the heat sink 3, intended to drain the calories generated by the light source(s) and thus reduce the temperature thereof, and the size of this heat sink. .
  • the heat sink 3 positioned on a rear part of the light module, faces a wall delimiting a bottom 103 of the light module.
  • projector housing 102 opposite the transparent glass 104.
  • the shape of this bottom wall 103 and the shape of the heat sink 3 must be such that the heat sink can follow the pivoting movement of the light module along the two axes of pivoting without hitting the bottom wall 103 of the projector housing 102.
  • the light module 1 can be associated with a fan, so as to force air circulation from or to the heat sink 3.
  • a fan not shown here, can be secured to the projector housing.
  • the light module can carry the fan by completing the unitary subassembly mentioned above. The fan is thus attached to the light module by being placed under the heat sink.
  • the light module is configured to pivot in two directions, that is to say around two axes here perpendicular.
  • a first pivot axis A 1 is a vertical axis, so that the light module can pivot to take several positions around this vertical axis to illuminate more or less laterally
  • a second pivot axis A 2 is a horizontal and transverse axis , so that the light module can pivot to take several positions around this second axis to illuminate more or less vertically.
  • These two pivot axes can intersect at a central pivot point, without this being limiting to the invention.
  • a vertical median elongation plane Pv of the light module as a vertical plane comprising the optical axis Ax and the first axis A1 for the transverse pivoting of the light module
  • a horizontal median elongation plane Ph of the light module as a horizontal plane comprising the optical axis Ax and the second axis A2 for the vertical pivoting of the light module.
  • the heat sink 3 comprises in particular a base 4 and a dissipation member 12. More precisely, the base 4 has a first face 41, facing the body of the light module, and a second face 42 opposite the first face and from which the dissipation member 12 extends. Furthermore, the base 4 serves as a mechanical support for the light source(s) and the control elements of this light source(s). We understand that in this way the dissipation member 12 is arranged to dissipate the calories captured by the base 4 during the operation of the light sources, these calories being dissipated on the side of the bottom wall 103 of the projector housing 102.
  • the dissipation member 12 extends longitudinally, that is to say perpendicular to the base of the heat sink, between a first longitudinal end zone 12a made integral, by bonding, welding or any other manufacturing process, of this base 4 and a second longitudinal end zone 12b, left free facing the bottom wall 103, the clearance J left between this second free longitudinal end zone 12b and the bottom wall of the projector housing allowing the pivoting of the light module inside the projector.
  • the length of the dissipation member is defined in this longitudinal direction projecting from the base.
  • the heat sink 3 comprises a particular dissipation member 12 in that its second free longitudinal end zone 12b is truncated both on its lateral and vertical edges relative to the center of the dissipation member, in order to facilitate the pivoting of the light module inside the housing projector.
  • the length of the dissipation member is reduced on its vertical edges and on its longitudinal edges relative to the length of the center of the dissipation member.
  • the dissipation member 12 comprises a base 13 pressed against the base 4 and a plurality of fins 14 parallel to each other and respectively perpendicular to the base 13 and the second face 42 of the base 4. It will be understood that The base could be assimilated to the base in the case of possible realization, not shown here, where the fins are made in the same piece with the base.
  • Each fin 14 has the shape of a plate having a top 15 formed by the free edge extending parallel to and opposite the base 4, and having two end edges 16 extending between the top and the base .
  • the vertex 15 corresponds to the second longitudinal end zone previously described, and the end edges 16 extend perpendicular to the base of the first longitudinal end zone 12a and the second longitudinal end zone 12b.
  • the length of the fins of the dissipation member is defined as the distance between the top 15 of the fin and the base 4 common to these fins, in the longitudinal direction.
  • each fin 14 of the dissipation member 12 that is to say the transverse dimension between two successive fins of the series of fins, is for example between 4mm and 8mm.
  • such a spacing can still be between 6mm and 8mm, in particular for a light module without a fan.
  • the particular shape of the fins of the dissipation member at the level of the vertices will be described and in particular the specific truncation of these fins to allow the desired compromise between heat dissipation and the mobility of the light module in a weak clutter.
  • the fins 14 can thus be joined two by two at their vertices 15 by a rounded connection 18 extending at a distance from the base 4.
  • the dissipation member 12 can thus have the shape of a corrugated part 33 which extends projecting from the second face 42 of the base 4, being secured to the latter, for example by thermal glue.
  • the corrugated part 33 can be formed by at least one rolled sheet metal then attached against the second face 42 of the base.
  • this corrugated part 33 can be formed at least by a rolling and folding process, from a single sheet.
  • the fins are connected together alternately by connections 18 in the form of a rounded shape at their vertices 15 and by plane junctions 19 at the end of the fins opposite the connections 18 in a rounded shape.
  • a fin 14 is connected to a first neighboring fin, in a first direction in the transverse direction, by a connection 18 in the form of a rounded shape, at a distance from the base, and to a second neighboring fin, according to the opposite direction in this same transverse direction, by a plane junction 19 against the base.
  • a plurality of junctions 19 form the base 13 as it could be described previously.
  • the fins Whether the fins are connected together at their summit or whether they are free opposite the base, the fins extend parallel to each other, and respectively in a plane parallel to the vertical median elongation plane Pv of the light module.
  • the vertices 15 of each fin extend parallel to the base, and parallel to the first pivot axis A 1 of the light module.
  • the length of the fins 14 decreases from the center of the base 4 towards its periphery, so that the fins 14 located outside the series of parallel fins have a length less than that of the fins located in the center of said series.
  • the fins arranged furthest from the vertical median elongation plane Pv are smaller than those arranged closest to this elongation plane, it being understood that a first fin is smaller than a second fin since the longitudinal dimension of this first fin, from its base to the top, is smaller than that of the second fin.
  • the bottom wall 103 of the headlight housing can be arranged as close as possible to the fins 14 of larger dimensions, that is to say the fin or fins closest to the median plane of vertical elongation Pv, since the external fins do not risk hitting this wall when the light module pivots outwards and in particular when moving from the standard position to an extreme pivoted position.
  • the progressive reduction in the lengths of the fins 14 allows rotation of the light module without the dissipation member 12 hitting the bottom wall 103 of this housing 102.
  • the invention makes it possible to significantly reduce the dimensions to be provided for the projector housing 102 since in accordance with what has been illustrated , this housing can have a flat bottom wall 103, forming a flat surface which reduces the general bulk of the housing while allowing the pivoting of the module it contains.
  • An optimal shape of the projector housing can be obtained, for the freedom of transverse pivoting of the light module, by declining the characteristic of the longitudinal dimension of the fins as it has just been presented to all of the fins in the series.
  • Each fin thus has a length greater than the fin which is directly adjacent to it towards the end of the nearest dissipation member and a length smaller than the fin which is directly adjacent to it towards the center of this member. dissipation.
  • the two fins arranged in the center of the series, on either side of the optical axis Ax have the same length, the reduction in the length of the fins only starting from these two central fins.
  • no fin is of the same dimension, or that on the contrary, a greater number of central fins, and in particular three, have the same length, the reduction in the length of the fins towards the outside not concerning these three central fins.
  • the vertices 15 of the fins 14 then fit into a cylindrical shape 35 with a circular base, such that the axis of revolution of this cylindrical shape 35 coincides with the first pivot axis A 1 .
  • the fins will not do not exceed the theoretical envelope of this cylindrical shape, and the construction of the projector housing 102 can therefore be carried out as close as possible to this theoretical envelope.
  • the dissipation member is further configured to optimize the size of the projector housing while allowing the rotation of the light module around the second pivot axis A2.
  • the fins 14 are truncated on each of their end edges 16. More particularly, each fin 14 has at least one bevel 17 at the junction between the top 15 and an end edge 16.
  • the parts of a fin furthest from the horizontal median elongation plane Ph have a length less than the central part of this fin, centered on this horizontal median elongation plane.
  • the truncated parts forming bevels at the junction of the walls and the end edges then allow rotation of the light module without the dissipation member 12 hitting the bottom wall 103 of the housing 102 of the projector 100.
  • the beveling of the corners of the fins allows advantageously to minimize the space necessary to allow the pivoting of the light module in the projector around the second pivot axis A2.
  • the invention makes it possible to significantly reduce the dimensions to be provided for the projector housing 102 since, in accordance with what has been illustrated, this housing can have a flat bottom wall 103, forming a flat surface which reduces the general size of the housing while allowing the pivoting of the module it contains.
  • the dissipation member comprises a plurality of fins, arranged in series and configured such that on the one hand, the most eccentric fins have a length less than those of the fins arranged in the center of this series, and that on the other hand, one or more of these fins each have at least one bevel formed in place of a right corner at the junction between the top and an edge of end of this fin.
  • the end edges 16 of a fin 14 as comprising a straight part 16a, normal and adjacent to the base 4, and another inclined part 16b forming a ramp up to the top 15 of the fin 14.
  • the bevel produced to form the inclined part 16b forming a ramp can have a longitudinal dimension, that is to say a dimension projected onto the horizontal median elongation plane Ph, at least equal to the longitudinal dimension of the straight part 16a .
  • the height of the top 15 is between 10% and 80%, preferably between 30% and 60%, of the height of the fin at the level of its contact with the base 4, the height corresponding to the dimension along the vertical axis, parallel to the base.
  • the end edges of some of the fins can be cut differently from what has just been described, to form a zone for releasing the base, making zones or parts of the second face 42 of the base accessible. The end edge of these fins is then cut straight instead of being beveled.
  • the fins 14 can be made from material with the base 4 and form with it a single piece assembly, that is to say form a unitary part carried out in a single manufacturing operation, or else be carried out independently of the base and reported on it subsequently, in accordance with what is illustrated.

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

Description

L'invention relève du domaine des dispositifs d'éclairage et/ou de signalisation pour véhicule automobile. Elle concerne plus particulièrement un module lumineux destiné à être monté dans un projecteur de véhicule automobile, le module optique étant pivotable par rapport au projecteur.The invention relates to the field of lighting and/or signaling devices for motor vehicles. It relates more particularly to a light module intended to be mounted in a motor vehicle headlight, the optical module being pivotable relative to the headlight.

Les projecteurs automobiles sont habituellement composés d'un boîtier qui est fermé par une paroi transparente à travers laquelle passent un ou plusieurs faisceaux lumineux émis par un ou plusieurs modules lumineux logés dans ce boîtier de projecteur. Un module lumineux comprend principalement une source de lumière et un système optique apte à modifier au moins un paramètre de la lumière générée par la source de lumière pour l'émission de ce ou de ces faisceaux lumineux.Automotive headlights are usually composed of a housing which is closed by a transparent wall through which pass one or more light beams emitted by one or more light modules housed in this headlight housing. A light module mainly comprises a light source and an optical system capable of modifying at least one parameter of the light generated by the light source for the emission of this or these light beams.

L'évolution des techniques tend à favoriser l'utilisation de sources lumineuses constituées d'au moins une diode électroluminescente ou LED de l'anglais «Light Emitting Diode », en raison de leur faible consommation en énergie, de leur faible encombrement et de la qualité de l'éclairage obtenu.The evolution of techniques tends to favor the use of light sources consisting of at least one light emitting diode or LED from the English "Light Emitting Diode", due to their low energy consumption, their small size and the quality of lighting obtained.

Cependant, les diodes électroluminescentes lorsqu'elles sont allumées présentent comme inconvénient de produire de la chaleur qui s'avère être nuisible pour leur fonctionnement. En effet, plus une diode électroluminescente monte en température, plus son flux lumineux diminue. Lorsque le module lumineux est conçu pour générer un faisceau nécessitant une forte intensité lumineuse, tel que pour des feux de croisement, des feux de route ou des feux antibrouillard, le nombre de diodes électroluminescentes et/ou la puissance nécessaire à leur fonctionnement est élevé. Du fait de la forte montée en température du module lumineux durant son utilisation, il est nécessaire d'en réduire la température pour éviter tout dommage inhérent à une chaleur excessive.However, when lit, light-emitting diodes have the disadvantage of producing heat which proves to be harmful to their operation. Indeed, the more a light-emitting diode rises in temperature, the more its luminous flux decreases. When the light module is designed to generate a beam requiring high light intensity, such as for low beams, high beams or fog lights, the number of light-emitting diodes and/or the power necessary for their operation is high. Due to the sharp rise in temperature of the light module during use, it is necessary to reduce its temperature to avoid any damage inherent to excessive heat.

Pour assurer un refroidissement efficace du module lumineux équipé de ces diodes électroluminescentes, on dispose dans ce module un dissipateur de chaleur comportant une base porteuse des diodes électroluminescentes sur une première face et une partie dissipatrice de chaleur ménagée sur la face de la base opposée à cette première face. La partie dissipatrice de chaleur peut notamment être disposée vers le fond du boîtier du projecteur, c'est-à-dire à l'opposé de la paroi transparente fermant le boîtier. La présence de la partie dissipatrice de chaleur, si elle permet une évacuation de chaleur optimale, a pour inconvénient d'augmenter le volume global du module lumineux et donc de rendre son intégration plus délicate dans un projecteur.To ensure effective cooling of the light module equipped with these light-emitting diodes, a heat sink is provided in this module comprising a base carrying the light-emitting diodes on a first face and a heat-dissipating part provided on the face of the base opposite to this. first side. The heat dissipating part can in particular be arranged towards the bottom of the projector housing, that is to say opposite the transparent wall closing the housing. The presence of the heat dissipating part, although it allows optimal heat evacuation, has the disadvantage of increasing the overall volume of the light module and therefore making its integration more difficult in a projector.

Ce problème d'intégration est d'autant plus vrai lorsqu'un ou plusieurs modules lumineux doivent être montés mobiles dans le projecteur de manière à pouvoir éclairer de façon dynamique différentes parties d'une même scène. En effet, le projecteur doit alors réserver un espace libre, entre le module lumineux pivotable et les parois délimitant le boîtier de projecteur, qui soit suffisamment important pour permettre le pivotement du module lumineux et de sa partie dissipatrice de chaleur.This integration problem is all the more true when one or more light modules must be mounted mobile in the projector so as to be able to dynamically illuminate different parts of the same scene. Indeed, the projector must then reserve a free space, between the pivotable light module and the walls delimiting the projector housing, which is large enough to allow the pivoting of the light module and its heat dissipating part.

EP 2 218 964 A2 et CN 106 122 873 A divulguent des modules lumineux générateur d'au moins un faisceau lumineux connus de l'art antérieur. EP 2 218 964 A2 And CN 106 122 873 A disclose light modules generating at least one light beam known from the prior art.

L'invention s'inscrit dans ce contexte et elle propose un module lumineux comprenant une partie dissipatrice de chaleur agencée de manière à réduire de façon significative le volume occupé par le module lumineux dans son ensemble afin de faciliter son pivotement dans un espace réduit dans un projecteur de véhicule automobile.The invention fits into this context and it proposes a light module comprising a heat dissipating part arranged so as to significantly reduce the volume occupied by the light module as a whole in order to facilitate its pivoting in a reduced space in a motor vehicle headlight.

Pour cela, l'invention propose un module lumineux générateur d'au moins un faisceau lumineux suivant un axe optique pour véhicule automobile, selon la revendication 1. Selon l'invention, le module lumineux comprend au moins une source de lumière et au moins un dissipateur de chaleur configuré pour dissiper des calories générées par la source de lumière, le dissipateur de chaleur comprenant au moins une base agencée pour capter les calories générées par la source de lumière et un organe de dissipation agencé pour dissiper les calories captées par la base à l'extérieur du module lumineux, l'organe de dissipation comprenant une série d'ailettes s'étendant respectivement en saillie de la base, chaque ailette étant définie par un sommet qui s'étend à distance de la base et qui définit la longueur de cette ailette, et par deux bords d'extrémité s'étendant entre ledit sommet et ladite base.For this, the invention proposes a light module generating at least one light beam along an optical axis for a motor vehicle, according to claim 1. According to the invention, the light module comprises at least one light source and at least one heat sink configured to dissipate calories generated by the light source, the heat sink comprising at least one base arranged to capture the calories generated by the light source and a dissipation member arranged to dissipate the calories captured by the base outside the light module, the dissipation member comprising a series of fins extending respectively projecting from the base, each fin being defined by a vertex which extends at a distance from the base and which defines the length of this fin, and by two end edges extending between said vertex and said base.

Selon l'invention, le module lumineux est configuré pour pivoter autour d'un premier axe de pivotement et autour d'un deuxième axe de pivotement, et la série d'ailettes est configurée de manière à présenter des ailettes excentrées dont la longueur est moindre que la longueur des ailettes présentes au centre de l'organe de dissipation, au moins une ailette présentant par ailleurs au moins un biseau à la jonction entre le sommet et un bord d'extrémité.According to the invention, the light module is configured to pivot around a first pivot axis and around a second pivot axis, and the series of fins is configured so as to have eccentric fins whose length is less that the length of the fins present in the center of the dissipation member, at least one fin also having at least one bevel at the junction between the top and an end edge.

Ainsi, l'organe de dissipation comprend des ailettes, nécessaires pour augmenter la surface d'échange thermique et la dissipation correcte de la chaleur, dont la longueur diminue du centre vers la périphérie de la série d'ailettes de manière à réduire son encombrement au niveau de bords opposés de la base. Par le terme « longueur », on entend la direction selon laquelle les ailettes s'éloignent de la base. Pour au moins une ailette, la hauteur d'un sommet est inférieure à la hauteur de l'ailette au niveau de la base du dissipateur de chaleur. Par le terme « hauteur », on entend ici la direction selon laquelle s'étendent les sommets des ailettes, parallèlement au premier axe de pivotement. Ce mode de réalisation permet avantageusement de réduire l'espace nécessaire dans un projecteur pour pivoter le module lumineux, et donc de faciliter grandement l'intégration du module lumineux dans un projecteur lorsque le module lumineux pivote dans ledit projecteur.Thus, the dissipation member comprises fins, necessary to increase the heat exchange surface and the correct dissipation of heat, the length of which decreases from the center towards the periphery of the series of fins so as to reduce its bulk at the level of opposite edges of the base. By the term “length” we mean the direction in which the fins move away from the base. For at least one fin, the height of a peak is less than the height of the fin at the base of the heat sink. By the term “height”, we mean here the direction in which the tops of the fins extend, parallel to the first pivot axis. This embodiment advantageously makes it possible to reduce the space required in a projector to pivot the light module, and therefore to greatly facilitate the integration of the light module into a projector when the light module pivots in said projector.

Selon l'invention, la longueur des ailettes varie de sorte que leurs sommets s'inscrivent dans une forme cylindrique. En d'autres termes, les longueurs des ailettes sont telles que les sommets sont disposés sur ou à l'intérieur d'un cercle dont le rayon est défini sensiblement par la dimension entre le sommet de l'ailette centrale et un axe de pivotement, les ailettes étant agencées à l'intérieur de ce cercle. Dans ce contexte, la longueur des ailettes peut diminuer de façon constante lorsqu'on s'écarte du centre de la série d'ailettes parallèles, ou bien la variation de longueur peut consister en une diminution de longueur à pas variable, notamment pour s'adapter aux contraintes thermiques spécifiques d'un module lumineux.According to the invention, the length of the fins varies so that their tops are in a cylindrical shape. In other words, the lengths of the fins are such that the vertices are arranged on or inside a circle whose radius is defined substantially by the dimension between the top of the central fin and a pivot axis, the fins being arranged at inside this circle. In this context, the length of the fins can decrease constantly when one moves away from the center of the series of parallel fins, or the variation in length can consist of a reduction in length at variable steps, in particular to adapt to the specific thermal constraints of a light module.

Selon différentes variantes de réalisation, prises seules ou en combinaison, on pourra prévoir que :

  • la longueur des ailettes diminue au fur et à mesure que l'on s'écarte du centre de la série d'ailettes.
  • la longueur des ailettes diminue de façon constante lorsqu'on s'écarte du centre de la série d'ailettes parallèles.
  • la forme cylindrique dans laquelle les sommets s'inscrivent présente un axe confondu avec le premier axe de pivotement.
  • les sommets s'étendent parallèlement au premier axe de pivotement.
  • le module lumineux est configuré pour pivoter autour d'un deuxième axe de pivotement perpendiculaire au premier axe de pivotement.
  • pour au moins une ailette, la hauteur du sommet est comprise entre 10% et 80%, de préférence entre 30% et 60% de la hauteur de l'ailette au niveau de la base du dissipateur de chaleur.
  • une pluralité d'ailettes présente un biseau à la jonction entre leur sommet et l'un des bords d'extrémité.
  • au moins une ailette présente un biseau à chaque jonction entre son sommet et ses bords d'extrémité.
  • un bord d'extrémité d'une ailette présentant un biseau comporte une partie droite, adjacente à la base, et une partie inclinée qui la prolonge et qui forme une rampe, ladite partie inclinée présentant une dimension longitudinale au moins égale à celle de la partie droite.
  • l'organe de dissipation est fixé, par exemple par collage, sur la base ou bien il est réalisé d'un seul tenant avec cette base.
  • les ailettes s'étendent perpendiculairement par rapport à un premier plan dans lequel s'étend majoritairement la base.
  • la base s'inscrit dans un plan perpendiculaire à l'axe optique.
According to different embodiments, taken alone or in combination, it can be expected that:
  • the length of the fins decreases as we move away from the center of the series of fins.
  • the length of the fins decreases constantly as we move away from the center of the series of parallel fins.
  • the cylindrical shape in which the vertices are inscribed has an axis coincident with the first pivot axis.
  • the vertices extend parallel to the first pivot axis.
  • the light module is configured to pivot about a second pivot axis perpendicular to the first pivot axis.
  • for at least one fin, the height of the top is between 10% and 80%, preferably between 30% and 60% of the height of the fin at the base of the heat sink.
  • a plurality of fins has a bevel at the junction between their apex and one of the end edges.
  • at least one fin has a bevel at each junction between its top and its end edges.
  • an end edge of a fin having a bevel has a straight part, adjacent to the base, and an inclined part which extends it and which forms a ramp, said inclined part having a longitudinal dimension at least equal to that of the straight part.
  • the dissipation member is fixed, for example by gluing, to the base or it is made in one piece with this base.
  • the fins extend perpendicularly to a first plane in which the base mainly extends.
  • the base lies in a plane perpendicular to the optical axis.

Bien entendu, les différentes caractéristiques, variantes et formes de réalisation mentionnées ci-dessus peuvent être associées les unes avec les autres selon diverses combinaisons, dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres.Of course, the different characteristics, variants and embodiments mentioned above can be associated with each other in various combinations, as long as they are not incompatible or exclusive of each other.

L'invention porte également sur un projecteur de véhicule automobile comportant un boîtier à l'intérieur duquel au moins un module lumineux décrit ci-dessus est monté de manière à être pivotable autour de deux axes de pivotement.The invention also relates to a motor vehicle headlight comprising a housing inside which at least one light module described above is mounted so as to be pivotable around two pivot axes.

Le module lumineux peut notamment pivoter autour d'un premier axe de pivotement, et ce premier axe de pivotement peut être confondu avec un axe de révolution d'un cylindre dans lequel sont inscrits les sommets de la série des ailettes.The light module can in particular pivot around a first pivot axis, and this first pivot axis can be confused with an axis of revolution of a cylinder in which the vertices of the series of fins are inscribed.

Le module lumineux peut pivoter autour d'un deuxième axe de pivotement normal ou sensiblement normal à l'axe optique et au premier axe de pivotement du module lumineux. De préférence, les bords biseautés des ailettes sont configurés pour minimiser l'espace nécessaire dans le projecteur automobile pour permettre le pivotement du module lumineux autour du deuxième axe de pivotement.The light module can pivot around a second pivot axis normal or substantially normal to the optical axis and to the first pivot axis of the light module. Preferably, the beveled edges of the fins are configured to minimize the space necessary in the automotive headlight to allow pivoting of the light module around the second pivot axis.

D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement à la lecture de la description donnée ci-après à titre indicatif en relation avec des dessins dans lesquels :

  • la figure 1 est une vue en perspective d'un module lumineux selon un aspect de l'invention, dans laquelle on a notamment rendu visibles une lentille, un corps et un organe dissipateur de chaleur ;
  • la figure 2 est une vue de dessus du module lumineux illustré à la figure 1, dans laquelle on a illustré un boîtier de projecteur de véhicule automobile logeant ce module lumineux, ledit module lumineux étant ici dans une première position standard de projection ;
  • la figure 3 est une vue de dessus similaire à celle de la figure 2, dans laquelle le module lumineux est dans une deuxième position de projection, pivotée dans le projecteur autour d'un premier axe de pivotement ;
  • la figure 4 est une vue de côté du module lumineux illustré à la figure 1, dans laquelle on a illustré un boîtier de projecteur de véhicule automobile logeant ce module lumineux, ledit module lumineux étant ici dans une première position standard de projection ;
  • la figure 5 est une vue de côté similaire à celle de la figure 4, dans laquelle le module lumineux est dans une troisième position de projection, pivotée dans le projecteur autour d'un deuxième axe de pivotement ;
  • la figure 6 est une vue de derrière du module lumineux illustré à la figure 1.
Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below for information purposes in relation to the drawings in which:
  • there figure 1 is a perspective view of a light module according to one aspect of the invention, in which a lens, a body and a heat dissipating member have in particular been made visible;
  • there figure 2 is a top view of the light module illustrated in figure 1 , in which there is illustrated a motor vehicle headlight housing housing this light module, said light module being here in a first standard projection position;
  • there Figure 3 is a top view similar to that of the figure 2 , in which the light module is in a second projection position, pivoted in the projector around a first pivot axis;
  • there Figure 4 is a side view of the light module shown in figure 1 , in which there is illustrated a motor vehicle headlight housing housing this light module, said light module being here in a first standard projection position;
  • there figure 5 is a side view similar to that of the Figure 4 , in which the light module is in a third projection position, pivoted in the projector around a second pivot axis;
  • there Figure 6 is a rear view of the light module shown in figure 1 .

Il faut tout d'abord noter que les figures exposent l'invention de manière détaillée pour mettre en oeuvre l'invention, lesdites figures pouvant bien entendu servir à mieux définir l'invention le cas échéant.It should first be noted that the figures set out the invention in detail to implement the invention, said figures being able of course to be used to better define the invention if necessary.

Dans la suite de la description, les directions longitudinale, verticale et transversale se réfèrent au véhicule automobile comportant un projecteur dans lequel un module lumineux selon un aspect de l'invention est intégré. Une direction longitudinale L correspond à une direction d'avancement du véhicule et à la direction de l'axe optique Ax le long duquel les rayons lumineux générés par le module lumineux 1 s'étendent majoritairement lorsque le module lumineux est dans une position standard dans le projecteur avant. Une direction transversale T correspond à une direction perpendiculaire à cette direction longitudinale et qui s'étend horizontalement, et une direction verticale V correspond à une direction perpendiculaire aux directions longitudinale et transversale et qui s'étend verticalement. Les orientations avant et arrière, gauche et droite, haute et basse sont relatives respectivement à chacune des directions longitudinale, verticale et transversale précédemment décrites, et sont à considérer par rapport au poste d'observation du conducteur d'un véhicule roulant en marche avant et en référence au trièdre L,V,T illustré sur les figures.In the remainder of the description, the longitudinal, vertical and transverse directions refer to the motor vehicle comprising a headlight in which a light module according to one aspect of the invention is integrated. A longitudinal direction L corresponds to a direction of advancement of the vehicle and to the direction of the optical axis Ax along which the light rays generated by the light module 1 extend mainly when the light module is in a standard position in the front headlight. A transverse direction T corresponds to a direction perpendicular to this longitudinal direction and which extends horizontally, and a vertical direction V corresponds to a direction perpendicular to the longitudinal and transverse directions and which extends vertically. The front and rear, left and right, high and low orientations relate respectively to each of the longitudinal, vertical and transverse directions previously described, and are to be considered in relation to the observation position of the driver of a vehicle traveling forward and with reference to the L, V, T trihedron illustrated in the figures.

Les figures 1 à 5 illustrent un module lumineux 1, autrement appelé module optique, dont la fonction est de générer et projeter un ou plusieurs faisceaux lumineux sur une route. Un tel module lumineux 1 est destiné à être installé dans un projecteur 100, par exemple avant, d'un véhicule automobile comme illustré aux figures 2 à 5. On notera que le projecteur évoqué ici comprend globalement un boîtier 102 fermé à l'avant par une glace transparente 104, cette dernière étant traversée par les rayons lumineux créés par le module lumineux selon l'invention. La forme du boîtier 102 a été représenté ici de façon schématique et on comprendra que les dimensions de ce boîtier peuvent être modifiées pour recevoir dans le volume intérieur du projecteur, délimité par le boîtier 102 et la glace transparente 104, un ou plusieurs modules lumineux selon l'invention.THE figures 1 to 5 illustrate a light module 1, otherwise called an optical module, whose function is to generate and project one or more light beams onto a road. Such a light module 1 is intended to be installed in a headlight 100, for example front, of a motor vehicle as illustrated in figures 2 to 5 . It will be noted that the projector mentioned here generally comprises a housing 102 closed at the front by a transparent glass 104, the latter being crossed by the light rays created by the light module according to the invention. The shape of the housing 102 has been shown here schematically and it will be understood that the dimensions of this housing can be modified to receive in the interior volume of the projector, delimited by the housing 102 and the transparent glass 104, one or more light modules according to the invention.

Un module lumineux 1 selon un aspect de l'invention forme un sous-ensemble unitaire, c'est-à-dire un objet qui peut remplir sa fonction d'éclairage et/ou de signalisation sans autre apport que l'énergie électrique nécessaire à son allumage.A light module 1 according to one aspect of the invention forms a unitary subassembly, that is to say an object which can fulfill its lighting and/or signaling function without any other contribution than the electrical energy necessary to its ignition.

Le module lumineux 1 selon l'invention est agencé pour former un faisceau lumineux d'un type unique, tel qu'un feu de croisement ou un feu de route. Alternativement, le module lumineux 1 est tout particulièrement adapté pour créer le faisceau de feu de croisement et le faisceau de feu de route. Selon un exemple de réalisation, le module lumineux 1 est adapté pour que le faisceau route soit la combinaison du faisceau de feu de croisement avec un faisceau complémentaire qui éclaire au-dessus du faisceau de feu de croisement, l'ensemble formant ainsi le faisceau de feu de route. En fonction de la charge du véhicule par exemple, l'assiette doit pouvoir être modifiée par inclinaison des projecteurs ou des modules lumineux à l'intérieur de ces projecteurs, et plus particulièrement par pivotement autour d'un axe horizontal. Par ailleurs, pour l'obtention d'une fonction de type DBL (pour l'acronyme anglais « Dynamic Bending Light »), la projection de faisceau lumineux selon une direction parallèle à la direction d'avancement du véhicule doit pouvoir être modifiée afin d'éclairer l'intérieur des virages quand le véhicule tourne par exemple, et les modules lumineux doivent à cet effet être pivotables autour d'un axe vertical.The light module 1 according to the invention is arranged to form a light beam of a single type, such as a low beam or a main beam. Alternatively, the light module 1 is particularly suitable to create the low beam and high beam. According to an exemplary embodiment, the light module 1 is adapted so that the high beam is the combination of the low beam beam with a complementary beam which illuminates above the low beam beam, the assembly thus forming the low beam. high beam. Depending on the load of the vehicle for example, the trim must be able to be modified by tilting the headlights or light modules inside these headlights, and more particularly by pivoting around a horizontal axis. Furthermore, to obtain a DBL type function (for the English acronym “Dynamic Bending Light”), the projection of the light beam in a direction parallel to the direction of travel of the vehicle must be able to be modified in order to 'illuminate the inside of bends when the vehicle is turning, for example, and the light modules must for this purpose be pivotable around a vertical axis.

Dans le projecteur selon l'invention, et plus particulièrement un projecteur avant de véhicule, le ou les modules lumineux 1 logés à l'intérieur de ce projecteur sont pivotants, c'est-à-dire qu'ils sont montés sur le boîtier du projecteur, ou sur une pièce de structure solidaire de ce boîtier. Le ou les modules lumineux 1 sont configurés pour pivoter dans le projecteur, au moins entre une position standard, telle qu'elle est illustrée sur les figures 2 et 4, et dans laquelle l'axe optique est orienté parallèlement à la direction longitudinale, dans un plan horizontal, afin d'éclairer essentiellement la scène de route en amont du véhicule, et une position dynamique, suite à un pivotement autour d'un premier axe de pivotement (figure 3) ou autour d'un deuxième axe de pivotement (figure 5), afin de pouvoir éclairer de façon dynamique des parties d'une scène route non suffisamment éclairée par la position standard du ou des modules lumineux, en modifiant par l'utilisation de moyens connus la hauteur de l'axe optique Ax, et/ou son orientation latérale.In the headlight according to the invention, and more particularly a vehicle front headlight, the light module(s) 1 housed inside this headlight are pivotable, that is to say they are mounted on the housing of the projector, or on a structural part integral with this housing. The light module(s) 1 are configured to pivot in the projector, at least between a standard position, as illustrated on the figures 2 And 4 , and in which the optical axis is oriented parallel to the longitudinal direction, in a horizontal plane, in order to essentially illuminate the road scene ahead of the vehicle, and a dynamic position, following a pivot around a first axis pivoting ( Figure 3 ) or around a second pivot axis ( figure 5 ), in order to be able to dynamically illuminate parts of a road scene not sufficiently illuminated by the standard position of the light module(s), by modifying the height of the optical axis Ax using known means, and/or its lateral orientation.

Selon l'invention, et tel que cela va être décrit plus en détails ci-après, au moins un module lumineux comporte des moyens de refroidissement configurés pour présenter un encombrement formant compromis entre le refroidissement nécessaire des composants du module et la compacité du boîtier de projecteur à l'intérieur duquel doit pivoter le module lumineux équipé de ces moyens de refroidissement.According to the invention, and as will be described in more detail below, at least one light module comprises cooling means configured to present a footprint forming a compromise between the necessary cooling of the module components and the compactness of the projector housing inside which the light module equipped with these cooling means must pivot.

La figure 1 illustre plus en détails un module lumineux 1 selon l'invention. Le module lumineux 1 comprend au moins une source de lumière, ici non représentée et configurée pour émettre des rayons lumineux vers la sortie du module lumineux selon l'axe optique Ax, une lentille de projection 2 disposée en sortie du module lumineux 1 de manière à être traversée par les rayons lumineux émis par la source de lumière et un dissipateur de chaleur 3 configuré pour évacuer à l'arrière du module, c'est-à-dire à l'opposé de la lentille de projection, les calories résultant du fonctionnement de la source de lumière. Le module lumineux 1 comprend un corps 10 configuré d'une part pour contenir les rayons lumineux entre la ou les sources de lumière et la lentille de projection 2 et d'autre part pour former un support mécanique à chacun des composants et notamment la lentille de projection et le dissipateur de chaleur. Par ailleurs, le corps 10 comporte des moyens de réception 11 d'un cadre, ici non représenté, par l'intermédiaire duquel la rotation autour de deux axes de pivotement A1 et A2 est rendue possible.There figure 1 illustrates in more detail a light module 1 according to the invention. The light module 1 comprises at least one light source, here not shown and configured to emit light rays towards the output of the light module along the optical axis Ax, a projection lens 2 arranged at the outlet of the light module 1 so as to be crossed by the light rays emitted by the light source and a heat sink 3 configured to evacuate to the rear of the module, that is to say opposite the projection lens, the calories resulting from operation of the light source. The light module 1 comprises a body 10 configured on the one hand to contain the light rays between the light source(s) and the projection lens 2 and on the other hand to form a mechanical support for each of the components and in particular the projection lens. projection and heat sink. Furthermore, the body 10 comprises means 11 for receiving a frame, not shown here, by means of which rotation around two pivot axes A 1 and A 2 is made possible.

La lentille de projection 2 participe à la formation du faisceau lumineux souhaité, qu'il s'agisse d'un faisceau de type feu de croisement ou un faisceau de type feu de route. Tel que cela a été précisé, la lentille de projection 2 forme une première extrémité longitudinale du module lumineux 1, à l'opposé du dissipateur de chaleur 3.The projection lens 2 participates in the formation of the desired light beam, whether it is a low beam type beam or a high beam type beam. As has been specified, the projection lens 2 forms a first longitudinal end of the light module 1, opposite the heat sink 3.

La ou les sources de lumière peuvent prendre la forme d'une ou plusieurs diodes électroluminescentes, dont le fonctionnement peut être perturbé par une trop forte chaleur ambiante. Il convient de trouver un compromis entre la taille du dissipateur de chaleur 3, destiné à drainer les calories générées par la ou les sources de lumière et ainsi réduire la température de celle(s)-ci, et l'encombrement de ce dissipateur de chaleur.The light source(s) may take the form of one or more light-emitting diodes, the operation of which may be disrupted by excessive ambient heat. A compromise must be found between the size of the heat sink 3, intended to drain the calories generated by the light source(s) and thus reduce the temperature thereof, and the size of this heat sink. .

Il convient de noter que dans le logement défini à l'intérieur du projecteur pour recevoir le ou les modules lumineux, le dissipateur de chaleur 3, positionné sur une partie arrière du module lumineux, est en regard d'une paroi délimitant un fond 103 du boîtier 102 de projecteur, opposée à la glace transparente 104. La forme de cette paroi de fond 103 et la forme du dissipateur de chaleur 3 doivent être telles que le dissipateur de chaleur puisse suivre le mouvement de pivotement du module lumineux selon les deux axes de pivotement sans heurter la paroi de fond 103 du boîtier 102 de projecteur.It should be noted that in the housing defined inside the projector to receive the light module(s), the heat sink 3, positioned on a rear part of the light module, faces a wall delimiting a bottom 103 of the light module. projector housing 102, opposite the transparent glass 104. The shape of this bottom wall 103 and the shape of the heat sink 3 must be such that the heat sink can follow the pivoting movement of the light module along the two axes of pivoting without hitting the bottom wall 103 of the projector housing 102.

Le module lumineux 1 peut être associé à un ventilateur, de manière à forcer une circulation d'air depuis ou vers le dissipateur de chaleur 3. Un tel ventilateur, ici non illustré peut être solidarisé au boîtier du projecteur. Alternativement, le module lumineux peut porter le ventilateur en venant compléter le sous-ensemble unitaire évoqué plus haut. Le ventilateur est ainsi attaché au module lumineux en étant disposé sous le dissipateur de chaleur.The light module 1 can be associated with a fan, so as to force air circulation from or to the heat sink 3. Such a fan, not shown here, can be secured to the projector housing. Alternatively, the light module can carry the fan by completing the unitary subassembly mentioned above. The fan is thus attached to the light module by being placed under the heat sink.

Le module lumineux est configuré pour pivoter dans deux directions, c'est-à-dire autour de deux axes ici perpendiculaires. Un premier axe de pivotement A1 est un axe vertical, de sorte que le module lumineux peut pivoter pour prendre plusieurs positions autour de cet axe vertical pour éclairer plus ou moins latéralement, et un deuxième axe de pivotement A2 est un axe horizontal et transversal, de sorte que le module lumineux peut pivoter pour prendre plusieurs positions autour de ce deuxième axe pour éclairer plus ou moins verticalement. Ces deux axes de pivotement peuvent se couper en un point central de pivotement, sans que cela soit limitatif de l'invention.The light module is configured to pivot in two directions, that is to say around two axes here perpendicular. A first pivot axis A 1 is a vertical axis, so that the light module can pivot to take several positions around this vertical axis to illuminate more or less laterally, and a second pivot axis A 2 is a horizontal and transverse axis , so that the light module can pivot to take several positions around this second axis to illuminate more or less vertically. These two pivot axes can intersect at a central pivot point, without this being limiting to the invention.

Dans ce qui va suivre, et tel que cela est illustré sur la figure 1, on définit un plan d'allongement médian vertical Pv du module lumineux comme un plan vertical comportant l'axe optique Ax et le premier axe A1 pour le pivotement transversal du module lumineux, et un plan d'allongement médian horizontale Ph du module lumineux comme un plan horizontal comportant l'axe optique Ax et le deuxième axe A2 pour le pivotement vertical du module lumineux.In what follows, and as illustrated in the figure 1 , we define a vertical median elongation plane Pv of the light module as a vertical plane comprising the optical axis Ax and the first axis A1 for the transverse pivoting of the light module, and a horizontal median elongation plane Ph of the light module as a horizontal plane comprising the optical axis Ax and the second axis A2 for the vertical pivoting of the light module.

On va maintenant décrire plus en détails une forme de module lumineux équipé d'un dissipateur de chaleur spécifique qui permette de limiter l'encombrement du module lors de son pivotement autour de l'un ou l'autre de ses axes de pivotement, de sorte que la forme de la paroi de fond 103 du boîtier de projecteur peut être ajustée en conséquence pour limiter l'encombrement du projecteur dans le véhicule automobile.We will now describe in more detail a form of light module equipped with a specific heat sink which makes it possible to limit the bulk of the module when it pivots around one or the other of its pivot axes, so as to that the shape of the bottom wall 103 of the headlight housing can be adjusted accordingly to limit the size of the headlight in the motor vehicle.

Tel que cela est visible sur les figures 1 à 5, le dissipateur de chaleur 3 comprend notamment une base 4 et un organe de dissipation 12. Plus précisément, la base 4 présente une première face 41, tournée vers le corps du module lumineux, et une deuxième face 42 opposée à la première face et à partir de laquelle s'étend l'organe de dissipation 12. Par ailleurs, la base 4 sert de support mécanique à la ou aux sources lumineuses et des éléments de pilotage de cette ou ces sources lumineuses. On comprend que de la sorte l'organe de dissipation 12 est agencé pour dissiper les calories captées par la base 4 lors du fonctionnement des sources lumineuses, ces calories étant dissipées du côté de la paroi de fond 103 du boîtier 102 de projecteur.As visible on the figures 1 to 5 , the heat sink 3 comprises in particular a base 4 and a dissipation member 12. More precisely, the base 4 has a first face 41, facing the body of the light module, and a second face 42 opposite the first face and from which the dissipation member 12 extends. Furthermore, the base 4 serves as a mechanical support for the light source(s) and the control elements of this light source(s). We understand that in this way the dissipation member 12 is arranged to dissipate the calories captured by the base 4 during the operation of the light sources, these calories being dissipated on the side of the bottom wall 103 of the projector housing 102.

L'organe de dissipation 12 s'étend longitudinalement, c'est-à-dire perpendiculairement à la base du dissipateur de chaleur, entre une première zone d'extrémité longitudinale 12a rendue solidaire, par collage, soudage ou tout autre process de fabrication, de cette base 4 et une deuxième zone d'extrémité longitudinale 12b, laissée libre en regard de la paroi de fond 103, le jeu J laissé entre cette deuxième zone d'extrémité longitudinale 12b libre et la paroi de fond du boitier de projecteur permettant le pivotement du module lumineux à l'intérieur du projecteur. On définit la longueur de l'organe de dissipation selon cette direction longitudinale en saillie de la base.The dissipation member 12 extends longitudinally, that is to say perpendicular to the base of the heat sink, between a first longitudinal end zone 12a made integral, by bonding, welding or any other manufacturing process, of this base 4 and a second longitudinal end zone 12b, left free facing the bottom wall 103, the clearance J left between this second free longitudinal end zone 12b and the bottom wall of the projector housing allowing the pivoting of the light module inside the projector. The length of the dissipation member is defined in this longitudinal direction projecting from the base.

Tel que cela va être décrit plus en détail ci-après, le dissipateur de chaleur 3 comporte un organe de dissipation 12 particulier en ce que sa deuxième zone d'extrémité longitudinale libre 12b est tronquée aussi bien sur ses bords latéraux que verticaux par rapport au centre de l'organe de dissipation, afin de faciliter le pivotement du module lumineux à l'intérieur du boîtier de projecteur. En d'autres termes, la longueur de l'organe de dissipation est réduite sur ses bords verticaux et sur ses bords longitudinaux par rapport à la longueur du centre de l'organe de dissipation.As will be described in more detail below, the heat sink 3 comprises a particular dissipation member 12 in that its second free longitudinal end zone 12b is truncated both on its lateral and vertical edges relative to the center of the dissipation member, in order to facilitate the pivoting of the light module inside the housing projector. In other words, the length of the dissipation member is reduced on its vertical edges and on its longitudinal edges relative to the length of the center of the dissipation member.

Plus particulièrement, l'organe de dissipation 12 comprend une embase 13 plaquée contre la base 4 et une pluralité d'ailettes 14 parallèles entre elles et respectivement perpendiculaires à l'embase 13 et la deuxième face 42 de la base 4. On comprendra que l'embase pourrait être assimilée à la base dans le cas de réalisation envisageable, ici non représenté, où les ailettes sont réalisées d'un même tenant avec la base.More particularly, the dissipation member 12 comprises a base 13 pressed against the base 4 and a plurality of fins 14 parallel to each other and respectively perpendicular to the base 13 and the second face 42 of the base 4. It will be understood that The base could be assimilated to the base in the case of possible realization, not shown here, where the fins are made in the same piece with the base.

Chaque ailette 14 présente la forme d'une plaque comportant un sommet 15 formé par le bord libre s'étendant parallèlement et à l'opposé de la base 4, et comportant deux bords d'extrémité 16 s'étendant entre le sommet et la base. Le sommet 15 correspond à la deuxième zone d'extrémité longitudinale précédemment décrite, et les bords d'extrémité 16 s'étendent perpendiculairement à la base de la première zone d'extrémité longitudinale 12a et la deuxième zone d'extrémité longitudinale 12b.Each fin 14 has the shape of a plate having a top 15 formed by the free edge extending parallel to and opposite the base 4, and having two end edges 16 extending between the top and the base . The vertex 15 corresponds to the second longitudinal end zone previously described, and the end edges 16 extend perpendicular to the base of the first longitudinal end zone 12a and the second longitudinal end zone 12b.

Conformément à ce qui a été évoqué précédemment, la longueur des ailettes de l'organe de dissipation est définie comme la distance entre le sommet 15 de l'ailette et la base 4 commune à ces ailettes, selon la direction longitudinale.In accordance with what was mentioned previously, the length of the fins of the dissipation member is defined as the distance between the top 15 of the fin and the base 4 common to these fins, in the longitudinal direction.

L'écartement entre chaque ailette 14 de l'organe de dissipation 12, c'est-à-dire la dimension transversale entre deux ailettes successives de la série d'ailettes, est compris par exemple entre 4mm et 8mm. Avantageusement, un tel écartement peut encore être compris entre 6mm et 8mm, notamment pour un module lumineux dépourvu de ventilateur.The spacing between each fin 14 of the dissipation member 12, that is to say the transverse dimension between two successive fins of the series of fins, is for example between 4mm and 8mm. Advantageously, such a spacing can still be between 6mm and 8mm, in particular for a light module without a fan.

Dans ce qui va suivre, il va être décrit la forme particulière des ailettes de l'organe de dissipation au niveau des sommets et notamment la troncature spécifique de ces ailettes pour permettre le compromis recherché entre la dissipation thermique et la mobilité du module lumineux dans un faible encombrement. Dans ce contexte, il est possible, tel qu'illustré, d'avoir des zones de jonction entre les ailettes de la série. Les ailettes 14 peuvent ainsi être jointes deux à deux à leurs sommets 15 par une liaison 18 en forme d'arrondi s'étendant à distance de la base 4.In what follows, the particular shape of the fins of the dissipation member at the level of the vertices will be described and in particular the specific truncation of these fins to allow the desired compromise between heat dissipation and the mobility of the light module in a weak clutter. In this context, it is possible, as illustrated, to have junction zones between the fins of the series. The fins 14 can thus be joined two by two at their vertices 15 by a rounded connection 18 extending at a distance from the base 4.

Tel que cela est plus particulièrement visible sur les figures 2 à 5, l'organe de dissipation 12 peut ainsi présenter la forme d'une pièce ondulée 33 qui s'étend en saillie de la deuxième face 42 de la base 4, en étant solidarisée sur cette dernière, par exemple par une colle thermique. Plus particulièrement, la pièce ondulée 33 peut être formée par au moins une tôle roulée puis rapportée contre la deuxième face 42 de la base. À titre d'exemple non limitatif de procédé d'obtention, cette pièce ondulée 33 peut être formée au moins par un procédé de roulage et de pliage, à partir d'une seule et unique tôle.As is more particularly visible on the figures 2 to 5 , the dissipation member 12 can thus have the shape of a corrugated part 33 which extends projecting from the second face 42 of the base 4, being secured to the latter, for example by thermal glue. More particularly, the corrugated part 33 can be formed by at least one rolled sheet metal then attached against the second face 42 of the base. As a non-limiting example of a method of obtaining, this corrugated part 33 can be formed at least by a rolling and folding process, from a single sheet.

Dans cette pièce ondulée formée à partie d'une seule et unique tôle, les ailettes sont reliées entre elles alternativement par des liaisons 18 en forme d'arrondi au niveau de leurs sommets 15 et par des jonctions 19 planes au niveau de l'extrémité des ailettes à l'opposé des liaisons 18 en forme d'arrondi. En d'autres termes, une ailette 14 est reliée à une première ailette voisine, selon un premier sens dans la direction transversale, par une liaison 18 en forme d'arrondi, à distance de la base, et à une deuxième ailette voisine, selon le sens opposé dans cette même direction transversale, par une jonction 19 plane contre la base. Une pluralité de jonctions 19 forme l'embase 13 telle qu'elle a pu être décrite précédemment.In this corrugated part formed from a single sheet, the fins are connected together alternately by connections 18 in the form of a rounded shape at their vertices 15 and by plane junctions 19 at the end of the fins opposite the connections 18 in a rounded shape. In other words, a fin 14 is connected to a first neighboring fin, in a first direction in the transverse direction, by a connection 18 in the form of a rounded shape, at a distance from the base, and to a second neighboring fin, according to the opposite direction in this same transverse direction, by a plane junction 19 against the base. A plurality of junctions 19 form the base 13 as it could be described previously.

Que les ailettes soient reliées entre elles au niveau de leur sommet ou bien qu'elles soient libres à l'opposé de la base, les ailettes s'étendent parallèlement entre elles, et respectivement dans un plan parallèle au plan d'allongement médian vertical Pv du module lumineux. Les sommets 15 de chaque ailette s'étendent parallèlement à la base, et parallèlement au premier axe de pivotement A1 du module lumineux.Whether the fins are connected together at their summit or whether they are free opposite the base, the fins extend parallel to each other, and respectively in a plane parallel to the vertical median elongation plane Pv of the light module. The vertices 15 of each fin extend parallel to the base, and parallel to the first pivot axis A 1 of the light module.

De manière remarquable, il est à noter que la longueur des ailettes 14 diminue depuis le centre de la base 4 en direction de sa périphérie, de sorte que les ailettes 14 situées à l'extérieur de la série d'ailettes parallèles présentent une longueur moindre de celle des ailettes situées au centre de ladite série. En d'autres termes, les ailettes disposées le plus loin du plan d'allongement médian vertical Pv sont plus petites que celles disposées au plus près de ce plan d'allongement, étant entendu qu'une première ailette est plus petite qu'une deuxième ailette dès lors que la dimension longitudinale de cette première ailette, depuis sa base jusqu'au sommet, est plus petite que celle de la deuxième ailette.Remarkably, it should be noted that the length of the fins 14 decreases from the center of the base 4 towards its periphery, so that the fins 14 located outside the series of parallel fins have a length less than that of the fins located in the center of said series. In other words, the fins arranged furthest from the vertical median elongation plane Pv are smaller than those arranged closest to this elongation plane, it being understood that a first fin is smaller than a second fin since the longitudinal dimension of this first fin, from its base to the top, is smaller than that of the second fin.

Il en résulte, tel que cela est visible sur les figures 2 et 3, que la paroi de fond 103 du boîtier de projecteur peut être agencée au plus près des ailettes 14 de plus grandes dimensions, c'est-à-dire l'ailette ou les ailettes les plus proches du plan médian d'allongement vertical Pv, puisque les ailettes extérieures ne risquent pas de heurter cette paroi lors du pivotement du module lumineux vers l'extérieur et notamment lors du passage de la position standard vers une position pivotée extrême.The result, as is visible on the figures 2 and 3 , that the bottom wall 103 of the headlight housing can be arranged as close as possible to the fins 14 of larger dimensions, that is to say the fin or fins closest to the median plane of vertical elongation Pv, since the external fins do not risk hitting this wall when the light module pivots outwards and in particular when moving from the standard position to an extreme pivoted position.

Ainsi, de façon avantageuse, lorsque le module lumineux 1 est monté dans un boitier 102 de projecteur 100 de sorte à pouvoir pivoter autour d'un premier axe de pivotement A1, la diminution progressive des longueurs des ailettes 14 permet une rotation du module lumineux sans que l'organe de dissipation 12 heurte la paroi de fond 103 de ce boîtier 102. De ce fait, l'invention permet de réduire de façon significative les dimensions à prévoir pour le boîtier 102 de projecteur puisque conformément à ce qui a été illustré, ce boîtier peut présenter une paroi de fond 103 plane, formant un méplat qui diminue l'encombrement général du boîtier tout en permettant le pivotement du module qu'il renferme.Thus, advantageously, when the light module 1 is mounted in a housing 102 of projector 100 so as to be able to pivot around a first pivot axis A 1 , the progressive reduction in the lengths of the fins 14 allows rotation of the light module without the dissipation member 12 hitting the bottom wall 103 of this housing 102. As a result, the invention makes it possible to significantly reduce the dimensions to be provided for the projector housing 102 since in accordance with what has been illustrated , this housing can have a flat bottom wall 103, forming a flat surface which reduces the general bulk of the housing while allowing the pivoting of the module it contains.

Afin de faciliter la compréhension de l'intérêt d'une telle configuration des ailettes, on a illustré en pointillés sur ces figures 2 et 3 une ailette extérieure 14ext de forme standard, c'est-à-dire avec une dimension longitudinale égale à celle des ailettes centrales. On comprend que dans la deuxième position illustrée sur la figure 3, après pivotement, une telle ailette extérieure 14ext de forme standard serait entrée en contact avec la paroi de fond 103 du boîtier de projecteur tel qu'il a ici été dimensionné, et qu'il aurait donc fallu augmenter l'encombrement de ce boîtier de projecteur pour permettre le pivotement total du module lumineux.In order to facilitate the understanding of the interest of such a configuration of the fins, we have illustrated in dotted lines on these figures 2 and 3 an external fin 14ext of standard shape, that is to say with a longitudinal dimension equal to that of the central fins. We understand that in the second position illustrated on the Figure 3 , after pivoting, such an external fin 14ext of standard shape would have come into contact with the bottom wall 103 of the projector housing as it has been dimensioned here, and it would therefore have been necessary to increase the bulk of this projector housing to allow total pivoting of the light module.

Une forme optimale du boîtier de projecteur peut être obtenue, pour la liberté de pivotement transversale du module lumineux, en déclinant la caractéristique de dimension longitudinale des ailettes telle qu'elle vient d'être présentée à l'ensemble des ailettes de la série. Chaque ailette présente ainsi une longueur plus grande que l'ailette qui lui est directement voisine vers l'extrémité de l'organe de dissipation la plus proche et une longueur plus petite que l'ailette qui lui est directement voisine vers le centre de cet organe de dissipation.An optimal shape of the projector housing can be obtained, for the freedom of transverse pivoting of the light module, by declining the characteristic of the longitudinal dimension of the fins as it has just been presented to all of the fins in the series. Each fin thus has a length greater than the fin which is directly adjacent to it towards the end of the nearest dissipation member and a length smaller than the fin which is directly adjacent to it towards the center of this member. dissipation.

On comprend que la diminution de la longueur des ailettes se fait alors au fur et à mesure depuis l'intérieur vers l'extérieur de l'organe de dissipation 12. On pourra prévoir dans ce contexte que cette diminution de la longueur des ailettes se fasse de façon constante, avec un pas régulier d'une ailette à l'autre, et qu'elle se fasse symétriquement par rapport au plan d'allongement vertical Pv.We understand that the reduction in the length of the fins then occurs gradually from the inside towards the outside of the dissipation member 12. We can predict in this context that this reduction in the length of the fins takes place constantly, with a regular pitch from one fin to the other, and that it is done symmetrically with respect to the vertical elongation plane Pv.

Dans l'exemple illustré, les deux ailettes disposées au centre de la série, de part et d'autre de l'axe optique Ax, présentent la même longueur, la diminution de la longueur des ailettes ne commençant qu'à partir de ces deux ailettes centrales. En variante de réalisation, il pourra être prévu qu'aucune ailette ne soit de la même dimension, ou qu'au contraire, un plus grand nombre d'ailettes centrales, et notamment trois, présentent une même longueur, la diminution de la longueur des ailettes vers l'extérieur ne concernant pas ces trois ailettes centrales.In the example illustrated, the two fins arranged in the center of the series, on either side of the optical axis Ax, have the same length, the reduction in the length of the fins only starting from these two central fins. As an alternative embodiment, it could be provided that no fin is of the same dimension, or that on the contrary, a greater number of central fins, and in particular three, have the same length, the reduction in the length of the fins towards the outside not concerning these three central fins.

Tel qu'illustré aux figures 2 et 3, les sommets 15 des ailettes 14 s'inscrivent alors dans une forme cylindrique 35 à base circulaire, telle que l'axe de révolution de cette forme cylindrique 35 est confondu avec le premier axe de pivotement A1. Dans n'importe quelle position de pivotement, les ailettes ne dépassent pas de l'enveloppe théorique de cette forme cylindrique, et la construction du boîtier 102 de projecteur peut dès lors être réalisée au plus près de cette enveloppe théorique.As illustrated in figures 2 and 3 , the vertices 15 of the fins 14 then fit into a cylindrical shape 35 with a circular base, such that the axis of revolution of this cylindrical shape 35 coincides with the first pivot axis A 1 . In any pivot position, the fins will not do not exceed the theoretical envelope of this cylindrical shape, and the construction of the projector housing 102 can therefore be carried out as close as possible to this theoretical envelope.

Selon l'invention, l'organe de dissipation est en outre configuré pour optimiser l'encombrement du boîtier de projecteur tout en permettant la rotation du module lumineux autour du deuxième axe de pivotement A2. A cet effet, les ailettes 14 sont tronquées sur chacun de leurs bords d'extrémité 16. Plus particulièrement, chaque ailette 14 présente au moins un biseau 17 au niveau de la jonction entre le sommet 15 et un bord d'extrémité 16.According to the invention, the dissipation member is further configured to optimize the size of the projector housing while allowing the rotation of the light module around the second pivot axis A2. For this purpose, the fins 14 are truncated on each of their end edges 16. More particularly, each fin 14 has at least one bevel 17 at the junction between the top 15 and an end edge 16.

De la sorte, si l'on se réfère à l'orientation verticale du module lumineux et son organe de dissipation, les parties d'une ailette les plus éloignées du plan d'allongement médian horizontal Ph présentent une longueur moins grande que la partie centrale de cette ailette, centrée sur ce plan d'allongement médian horizontal.In this way, if we refer to the vertical orientation of the light module and its dissipation member, the parts of a fin furthest from the horizontal median elongation plane Ph have a length less than the central part of this fin, centered on this horizontal median elongation plane.

Ainsi, de façon avantageuse et comme illustré aux figures 4 et 5, lorsque le module lumineux 1 est monté dans un projecteur de véhicule automobile de sorte à pouvoir pivoter autour d'un deuxième axe de pivotement A2, ledit axe étant normal à l'axe optique Ax et au premier axe de pivotement A1 précédemment décrit, les parties tronquées formant biseaux à la jonction des parois et des bords d'extrémité permettent alors une rotation du module lumineux sans que l'organe de dissipation 12 heurte la paroi de fond 103 du boîtier 102 du projecteur 100. Le biseautage des coins des ailettes permet avantageusement de minimiser l'espace nécessaire pour permettre le pivotement du module lumineux dans le projecteur autour du deuxième axe de pivotement A2. De ce fait, l'invention permet de réduire de façon significative les dimensions à prévoir pour le boîtier 102 de projecteur puisque conformément à ce qui a été illustré, ce boîtier peut présenter une paroi de fond 103 plane, formant un méplat qui diminue l'encombrement général du boîtier tout en permettant le pivotement du module qu'il renferme.Thus, advantageously and as illustrated in figures 4 and 5 , when the light module 1 is mounted in a motor vehicle headlight so as to be able to pivot around a second pivot axis A2, said axis being normal to the optical axis Ax and to the first pivot axis A1 previously described, the truncated parts forming bevels at the junction of the walls and the end edges then allow rotation of the light module without the dissipation member 12 hitting the bottom wall 103 of the housing 102 of the projector 100. The beveling of the corners of the fins allows advantageously to minimize the space necessary to allow the pivoting of the light module in the projector around the second pivot axis A2. As a result, the invention makes it possible to significantly reduce the dimensions to be provided for the projector housing 102 since, in accordance with what has been illustrated, this housing can have a flat bottom wall 103, forming a flat surface which reduces the general size of the housing while allowing the pivoting of the module it contains.

De manière à identique à ce qui a pu être décrit précédemment pour le pivotement autour du premier axe A1, on comprend qu'il aurait fallu là encore augmenter l'encombrement de ce boîtier de projecteur pour permettre le pivotement du module lumineux autour du deuxième axe A2 si une ailette présentait des bords d'extrémité 16 de forme standard, c'est-à-dire avec un coin, à la jonction du sommet et d'un bord d'extrémité, non rogné.In a manner identical to what could be described previously for the pivoting around the first axis A1, we understand that it would again have been necessary to increase the bulk of this projector housing to allow the pivoting of the light module around the second axis A2 if a fin had end edges 16 of standard shape, that is to say with a corner, at the junction of the top and an end edge, not trimmed.

Tel que cela vient d'être décrit, il est particulièrement avantageux que l'organe de dissipation comporte une pluralité d'ailettes, agencées en série et configurées de telle sorte que d'une part, les ailettes les plus excentrées présentent une longueur moindre que celles des ailettes agencées au centre de cette série, et que d'autre part, une ou plusieurs de ces ailettes présentent chacune au moins un biseau formé en lieu et place d'un coin droit à la jonction entre le sommet et un bord d'extrémité de cette ailette. La diminution de la dimension longitudinale de l'organe de dissipation qui en résulte, aussi bien au niveau de ses extrémités transversales que de ses extrémités verticales, permet un pivotement du module lumineux dans un boîtier de projecteur à encombrement réduit.As has just been described, it is particularly advantageous for the dissipation member to comprise a plurality of fins, arranged in series and configured such that on the one hand, the most eccentric fins have a length less than those of the fins arranged in the center of this series, and that on the other hand, one or more of these fins each have at least one bevel formed in place of a right corner at the junction between the top and an edge of end of this fin. The resulting reduction in the longitudinal dimension of the dissipation member, both at its transverse ends and at its vertical ends, allows the light module to pivot in a space-saving projector housing.

On comprend que, pour permettre l'installation de modules lumineux pivotables dans un boîtier de projecteur à l'encombrement défini, l'on pourra jouer sur l'inclinaison et la dimension du biseau 17 en fonction, tout comme sur le rapport de réduction de la longueur des parois excentrées par rapport à la longueur des parois au centre de la série d'ailettes.We understand that, to allow the installation of pivotable light modules in a projector housing with defined dimensions, we can play on the inclination and the dimension of the bevel 17 as a function, as well as on the reduction ratio of the length of the eccentric walls relative to the length of the walls in the center of the series of fins.

On peut définir, en se référant aux figures 4 et 5, les bords d'extrémité 16 d'une ailette 14 comme comprenant une partie droite 16a, normale et adjacente à la base 4, et une autre partie inclinée 16b formant rampe jusqu'au sommet 15 de l'ailette 14. Il convient de noter que le biseau réalisé pour former la partie inclinée 16b formant rampe peut présenter une dimension longitudinale, c'est-à-dire une dimension projetée sur le plan d'allongement médian horizontal Ph, au moins égale à la dimension longitudinale de la partie droite 16a.We can define, by referring to the figures 4 and 5 , the end edges 16 of a fin 14 as comprising a straight part 16a, normal and adjacent to the base 4, and another inclined part 16b forming a ramp up to the top 15 of the fin 14. It should be noted that the bevel produced to form the inclined part 16b forming a ramp can have a longitudinal dimension, that is to say a dimension projected onto the horizontal median elongation plane Ph, at least equal to the longitudinal dimension of the straight part 16a .

Dans ce contexte de dimensionnement du biseau 17, on pourra prévoir pour au moins une ailette que la hauteur du sommet 15 soit comprise entre 10% et 80%, de préférence entre 30% et 60%, de la hauteur de l'ailette au niveau de son contact avec la base 4, la hauteur correspondant à la dimension selon l'axe vertical, parallèlement à la base.In this context of sizing the bevel 17, it can be provided for at least one fin that the height of the top 15 is between 10% and 80%, preferably between 30% and 60%, of the height of the fin at the level of its contact with the base 4, the height corresponding to the dimension along the vertical axis, parallel to the base.

Par ailleurs, tel que cela est visible sur la figure 6, les bords extrémités de certaines des ailettes peuvent être découpés différemment de ce qui vient d'être décrit, pour former une zone de dégagement de la base, rendant accessible des zones ou parties de la deuxième face 42 de la base. Le bord d'extrémité de ces ailettes est alors découpé de façon droite au lieu d'être biseauté.Furthermore, as is visible on the Figure 6 , the end edges of some of the fins can be cut differently from what has just been described, to form a zone for releasing the base, making zones or parts of the second face 42 of the base accessible. The end edge of these fins is then cut straight instead of being beveled.

Tel que cela a été précisé précédemment, sans sortir du contexte de l'invention, les ailettes 14 peuvent être issus de matière avec la base 4 et former avec celle-ci un ensemble monobloc, c'est-à-dire former une pièce unitaire réalisée en une unique opération de fabrication, ou bien être réalisées indépendamment de la base et rapportées sur celle-ci par la suite, conformément à ce qui est illustré.As specified previously, without departing from the context of the invention, the fins 14 can be made from material with the base 4 and form with it a single piece assembly, that is to say form a unitary part carried out in a single manufacturing operation, or else be carried out independently of the base and reported on it subsequently, in accordance with what is illustrated.

La description qui précède explique clairement comment l'invention permet d'atteindre les objectifs qu'elle s'est fixés et notamment de proposer un module lumineux susceptible de pivoter, dans un encombrement acceptable, à l'intérieur d'un projecteur de véhicule automobile. La description faite sur un élément s'applique naturellement à tout élément de même nature et la portée de l'invention s'étend à tout élément équivalent.The preceding description clearly explains how the invention makes it possible to achieve the objectives it has set for itself and in particular to propose a light module capable of pivoting, within an acceptable footprint, inside a motor vehicle headlight. . The description made on an element naturally applies to any element of the same nature and the scope of the invention extends to any equivalent element.

Claims (10)

  1. Motor vehicle lighting module (1) for generating at least one light beam along an optical axis (Ax), the lighting module (1) comprising a body (10), at least one light source and at least one heatsink (3) configured to dissipate heat generated by the light source, the heatsink (3) comprising at least a base (4) adapted to capture the heat generated by the light source and a dissipation member (12) adapted to dissipate the heat captured by the base (4) externally of the lighting module (1), the base having a first face (41) facing toward the body of the lighting module and a second face (42) opposite the first face and from which the dissipation member (12) extends, the dissipation member (12) comprising a series of fins (14) projecting from the base (4), each fin (14) being defined by a summit (15) that extends at a distance from the base and that defines the length of that fin, and by two end edges (16) extending between said summit and said base, said lighting module is configured to pivot about a first pivot axis (A1) and about a second pivot axis (A2), and the series of fins (14) is configured to include eccentric fins the length of which is less than the length of the fins (14) at the centre of the dissipation member (12), at least one fin (14) further having at least one bevel (17) at the junction between the summit (15) and an end edge (16)
    characterized in that the lengths of fins are such that the summits are disposed on or inside a circle the radius of which is substantially defined by the dimension between the summit of the central fin and a pivot axis, the fins being arranged inside this circle.
  2. Lighting module (1) according to the preceding claim, characterized in that the length of the fins (14) decreases in the direction away from the centre of the series of fins (14).
  3. Lighting module (1) according to the preceding claim, characterized in that the length of fins (14) decreases in a constant manner in the direction away from the centre of the series of parallel fins (14).
  4. Lighting module (1) according to any one of the preceding claims, characterized in that the summits (15) extend parallel to the first pivot axis (A1).
  5. Lighting module (1) according to any one of the preceding claims, characterized in that it is configured to pivot about a second pivot axis (A2) perpendicular to the first pivot axis (A1).
  6. Lighting module (1) according to any one of the preceding claims, characterized in that a plurality of fins (14) have a bevel (17) at the junction between their summit (15) and one of the end edges (16).
  7. Lighting module (1) according to any one of the preceding claims, characterized in that at least one fin (14) has a bevel (17) at each junction between its summit (15) and its end edges (16).
  8. Lighting module (1) according to any one of the preceding claims, characterized in that an end edge (16) of a fin having a bevel (17) includes a straight part (16a), adjacent to the base (4), and an inclined part (16b) that extends it and that forms a ramp, said inclined part having a longitudinal dimension at least equal to that of the straight part.
  9. Lighting module (1) according to any one of the preceding claims, characterized in that the fins (14) extend perpendicularly to a first plane in which the base (4) mostly extends.
  10. Motor vehicle lamp (100) including a housing (102) inside which at least one lighting module (1) according to any one of the preceding claims is mounted to be pivotable about two pivot axes (A1, A2).
EP18186112.1A 2017-08-04 2018-07-27 Pivotable luminous module for vehicle headlight Active EP3438523B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1757523A FR3062461B1 (en) 2017-02-01 2017-08-04 PIVOTABLE LIGHT MODULE FOR VEHICLE PROJECTOR

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EP3438523A1 EP3438523A1 (en) 2019-02-06
EP3438523B1 true EP3438523B1 (en) 2024-05-29

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CN118009276B (en) * 2024-04-07 2024-06-07 深圳北极之光科技有限公司 Multifunctional LED lamp and lighting method

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CN106122873A (en) * 2016-08-24 2016-11-16 江苏亿诺车辆部件有限公司 A kind of automobile lamp radiator

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US7712926B2 (en) * 2006-08-17 2010-05-11 Koninklijke Philips Electronics N.V. Luminaire comprising adjustable light modules
US20090213588A1 (en) * 2008-02-14 2009-08-27 Robert Joel Manes Outdoor luminaire using light emitting diodes
JP5287324B2 (en) * 2009-02-13 2013-09-11 市光工業株式会社 Vehicle lighting
US8740402B2 (en) * 2012-06-12 2014-06-03 Albert Chow LED downlight
AT513915B1 (en) * 2013-02-14 2015-11-15 Zizala Lichtsysteme Gmbh Light module and lighting device with light module for a vehicle headlight

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CN106122873A (en) * 2016-08-24 2016-11-16 江苏亿诺车辆部件有限公司 A kind of automobile lamp radiator

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