FR3056698B1 - LUMINOUS MODULE FOR MOTOR VEHICLE - Google Patents

Abstract

A light module (1) comprises a light source (6), a projection lens (4) for projecting at least a portion of the light rays emitted by the light source (6), a plate (2) supporting the projection lens (4), and at least one intermediate optical element (3, 5) arranged between the projection lens (4) and the plate (2). According to the invention, the intermediate optical element (3, 5) comprises at least one portion or holding section (38, 53) in position of the projection lens (4) on the plate (2).

Description

LUMINOUS MODULE FOR MOTOR VEHICLE

The field of the present invention is that of the light modules for a motor vehicle, and in particular the lighting and / or signaling modules.

A motor vehicle is equipped with headlamps, or headlights, intended to illuminate the road in front of the vehicle, especially at night or in bad weather. These headlamps can generally be used in two lighting modes: a first mode "high beam" and a second mode "low beam". The "high beam" mode provides strong illumination of the road far ahead of the vehicle, with the risk of dazzling oncoming road users. The "low beam" mode provides more limited road lighting, but still offers good visibility without dazzling other road users. These two lighting modes are complementary.

In each of these modes of operation, in order to avoid the glare of oncoming road users, it is necessary to control the positioning and orientation of each of the projectors, and more particularly of each of the components of these components. projectors.

The projectors may comprise one or more light modules comprising a light source, an optical deflection element, a projection optics, each of these elements being mounted on a support. Each element of the module is fixed to the support by at least one fixing element, the support being itself fixed to the vehicle.

In this context, it must be ensured that the projection optics is in place with respect to the light source, but also that all the other elements are correctly arranged, an offset of one which may disturb the operation of the others.

The manufacturing tolerances of each of the parts are added to the mounting sets associated with each fastener, which generates a large number of parameters to be processed to obtain projectors capable of projecting beams compliant with the regulations.

In this context, the present invention aims to provide a light module for a motor vehicle that is simple to manufacture, assemble, adjust and implement.

A light module according to the invention comprises a light source, a projection lens intended to project at least a portion of the light rays emitted by the light source, a plate supporting at least the projection lens and at least one intermediate optical element arranged between the lens and the platinum. According to the invention, the intermediate optical element comprises at least one portion or holding section, participating in maintaining the position of the projection lens on the plate.

Thus, the light module according to the invention comprises a projection lens which is placed on a plate, in a position that allows the projection lens to collaborate with the light source to project at least a portion of the light rays emitted by the source light. The projection lens is held on the plate via the intermediate optical element.

By "posed" is meant that the projection lens does not have a clean fixing element, more particularly no gluing, screwing or welding means, with the plate. Before being held by the intermediate optical element, the projection lens is free on the plate.

Thus, the invention according to its first aspect limits the number of fasteners used to maintain the various elements on the plate. The limitation of the fasteners causes the limitation of the number of adjustments necessary to the fasteners. The limitation of the number of means and arrangements therefore decreases the manufacturing tolerances of the various stages of manufacture and assembly of the light module. It follows that the automation of the manufacture and assembly of the light module is facilitated. Another advantage of the invention is to limit the number of elements to be adjusted relative to each other to obtain a regulatory beam.

According to a characteristic of the invention, the intermediate optical element is fixed to the plate. It can in particular be screwed, glued, welded, the light module comprising at least one fixing element of the intermediate optical element on the plate. The intermediate optical element has a first portion and a second portion. The first part is the part in the direct vicinity of the stage, the second part being the furthest part of the stage. More particularly, the portion of the intermediate optical element participating in maintaining the projection lens on the plate is arranged in the first part of the intermediate optical element. In a particular arrangement of the device, the first part is a lower part arranged under the second part while being in contact with the plate.

The projection lens may comprise at least one positioning tab, and the lens, in particular at the level of this positioning tab which can rest on the plate, is clamped between the plate and the portion of the intermediate optical element participating in the maintenance.

The portion of the intermediate optical element participating in the maintenance of the projection lens may extend continuously over all or part of its width, or it may be subdivided into several subparts. The portion of the intermediate optical element may be related to the intermediate optical element or be made of material with the intermediate optical element.

By width means the direction perpendicular to the general direction of the light rays emitted by the light source and parallel to the surface of the plate where are arranged the different elements of the light module.

The portion of the intermediate optical element involved in holding the projection lens extends towards the projection lens so as to at least partially cover the positioning tab of the projection lens.

The projection lens may include a locating tab, or a plurality of locating tabs. In the case of a plurality of positioning tabs, the positioning tabs are of identical shape and size. The positioning tabs are regularly distributed over all or part of the width, in other words of the transverse dimension, of the projection lens. Alternatively, at least one positioning tab may be of different size or shape.

This feature ensures optimal retention of the projection lens on the platen.

According to the invention, the light module comprises a light source oriented in order to emit light rays in the general direction of the projection lens. Advantageously, the light module comprises a plurality of light sources, arranged in series. The series arrangement is defined as a substantially aligned arrangement of the different light sources along an axis perpendicular to the general direction of the light rays emitted by the light sources. The intermediate optical element and the projection lens are arranged perpendicular to the general direction of the rays emitted by the light. The intermediate optical element may in particular comprise a cover intended to intercept another part of the light rays emitted by the light sources. The cache has a first part and a second part. The first part is the part in the direct vicinity of the stage, the second part being the furthest part of the stage.

More particularly, the holding portion of the cache participating in the maintenance of the projection lens on the plate is arranged in the first part of the cache. In a particular arrangement of the device, the first part is a lower part arranged vertically under the second part. More particularly, the first part, or the lower part, is the part in contact with the plate.

The cover may comprise at least one rib which extends perpendicularly to the plate, between the plate attachment element and the light source. The rib is arranged to block the rays emitted by the light source that would reflect on the fastener. The rib at least partially surrounds the fastener element to the plate, especially in the case where the attachment to the plate is by screwing, riveting or riveting. More particularly, the rib is in the form of a circular arc. In an alternative embodiment, the upper portion of the rib is tapered.

Furthermore, the intermediate optical element may comprise an additional lens intended to collaborate with the light source and the projection lens to project in a controlled manner the light rays emitted by the light source.

Projecting the rays in a controlled manner means that we obtain a ray beam at the output of the module that complies with the specifications and regulations, in terms of shape, color and power. Controlled radii do not include little or no chromatic aberration.

According to a particular embodiment of the invention, the light module may comprise at least two intermediate optical elements, including at least one cover intended to intercept another part of the light rays emitted by the light source, and at least one additional lens intended collaborating with the light source and the projection lens to project in a controlled manner the light rays emitted by the light source.

In this context, the cover has substantially the same shape as that which can take a single intermediate optical element, and an additional lens is interposed between the cover and the projection lens. The additional lens has a positioning element so that the holding part of the cover participates in maintaining the additional lens on the plate.

According to this embodiment, the additional lens is placed on the plate. By laid, it is meant that the additional lens does not include a clean fastener, more particularly by gluing, screwing, welding, with the plate. Before being held by the cover, the projection lens is free on the plate.

According to this embodiment of the invention, the projection lens comprises at least one positioning tab. This positioning tab collaborates with the first part of the additional lens to hold the projection lens in position on the plate. This holding in position is by a support of the first part on the positioning tab. Alternatively, the support can be flat or punctual.

The positioning tab extends over a larger or smaller portion of the projection lens. More particularly, the positioning tab extends over the majority of the width of the positioning lens.

The projection lens may comprise a single locating tab, or it may include a plurality of locating tabs. The positioning tabs may or may not evenly be distributed over the width of the projection lens. Subparts may have identical or different shapes, and / or identical or different sizes.

The additional lens may comprise at least one positioning element, and the cover has a holding portion of the additional lens on the plate. The positioning element of the additional lens can collaborate with the retention portion of the cover to hold the additional lens in position on the platen. This holding in position is by a support of the holding portion on the positioning element. Alternatively, the support can be flat or punctual. Again, the cache can have a first part and a second part. The first part is the part in the direct vicinity of the stage, the second part being the furthest part of the stage. More particularly, the portion holding the cache participating in the maintenance of the additional lens on the plate is arranged in the first part of the cache. In a particular arrangement of the device, the first part is a lower part arranged vertically under the second part. More particularly, the first part, or the lower part, is the part in contact with the plate. The positioning element extends over a larger or smaller portion of the additional lens. More particularly, the positioning element extends over most of the width of the additional lens.

Alternatively, the additional lens may comprise a single positioning element, or it may comprise a plurality of positioning elements. The positioning elements may or may not evenly be distributed over the width of the additional lens. Subparts may have identical or different shapes, and / or identical or different sizes.

The platen may include at least one first groove for receiving the projection lens. The first groove is arranged to receive a part of the projection lens, more particularly the positioning tab.

The first groove has at least one boss. The bosses, extending in excess of the bottom of the groove, collaborates with the positioning tab of the projection lens to ensure a plane support of the projection lens.

The plate may comprise, in addition to the first groove configured to receive the positioning tab of the projection lens, at least a second groove for receiving the additional lens. The second groove is arranged in the plate so as to be parallel to the first groove. The second groove is of a shape substantially identical to the first groove. The second groove is arranged to receive a portion of the additional lens, more particularly the positioning element.

The second groove has at least one boss. The bosses, extending in excess thickness of the bottom of the groove, collaborates with the positioning element of the additional lens to ensure a plane support of the additional lens.

According to different characteristics, taken alone or in combination, provision can be made for: the shell comprises a base in contact with the plate: at least one partitioning wall extends perpendicularly projecting from the base, the partitioning wall being parallel in the general direction of the rays emitted by the light source; the partitioning wall comprises at least one axial extension finger in the direction of the projection lens; more particularly, the partition wall comprises several axial extension fingers; the fingers extend from the free end of the partitioning walls, that is to say the end opposite the base of the coke; the additional lens may comprise at least one notch intended to receive an axial extension finger of the cuff in order to participate in maintaining the additional lens on the platen; the axial extension finger of the cuff can participate in maintaining the projection lens on the platen; more particularly, this participation in the maintenance is done by a flat support of the end of the axial extension finger on the entrance face of the projection lens; the input face of the projection lens may have a shape configuration complementary to that of an axial extension finger; the additional lens may comprise at least one axial extension finger in the direction of the projection lens, alternatively or complementary to the presence of an axial extension finger extending the cover, and which similarly participates in maintaining the projection lens on the stage; the cover comprises at least one rib which extends perpendicular to the plate, between the fixing element to the plate and the light source, in particular to block the rays emitted by the light source which would be reflected on the fixing element : the rib at least partially surrounds the fastener element to the plate, especially in the case where the fastening to the plate is by screwing, riveting or riveting; more particularly, the rib may have a shape of a circular arc, and the upper part of the rib may be beveled. The invention also relates to a vehicle headlamp comprising at least one light module according to one of the aspects of the invention. The fixing element of the intermediate optical element may be glue, a fixing screw, a rivet or any other suitable type of attachment. More particularly, the fixing element is a fixing screw. It is the intermediate optical element which serves as a fastening element to the projection lens on the plate, that is to say that the attachment of a single element of the light module ensures the attachment of others. According to one of the features of the invention, the plate may comprise at least one heat sink. And the heat sink can be placed in the vicinity of the light sources, and in particular on the face of the support wall of the light sources which is opposite to the face supporting these sources.

Platinum is manufactured in any material useful to its operation, including metal, plastic. In particular, the plate of the light module can be made of aluminum.

The plate of the light module can be manufactured by any process adapted to the material of which it is formed. More particularly, the plate can be obtained by molding, and this plate can be made of aluminum.

The cover can be made of a thermoplastic material. The cover can be made of an opaque material, in whole or in part. It can be provided that only the partition walls of the cache are made of an opaque material. Alternatively, the cover or its walls may be covered with an opaque material. Opaque material means a material that absorbs most of the light rays emitted by the light source

Alternatively, the cover or one of its parts may be made of a reflective material. Alternatively, the cover or one of its parts may be covered with a reflective material.

The light module described by the invention can be advantageously used for headlamps equipped with Adaptive Driving Beam (Adaptive Driving Beam) function. Such an ADB function is intended to automatically detect a user of the road likely to be dazzled by a beam of light emitted in headlight mode by a projector, and to modify the outline of this beam of light in a manner to create a shadow zone at the location of the detected user. The advantages of the ADB function are multiple: comfort of use, better visibility compared to a lighting in dipped beam mode, better reliability for the change of mode, risk of dazzling greatly reduced, driving safer. The possibility of modifying the illumination beam is ensured by the division of all the rays emitted by the light sources into selectively activatable vertical segments. This division is performed by the partition walls of the cache and the light module according to the invention is therefore particularly suitable for the application of the ADB function. Other features, details and advantages of the invention will emerge more clearly on reading the description given below by way of indication and without limitation in relation to the appended drawings in which: FIG. 1 is an exploded view of FIG. a light module according to a first embodiment of the invention, - Figure 2 is a perspective view of the plate of the light module as shown in Figure 1; - Figure 3 is a sectional view of the module; FIG. 1 is a sectional view of the light module of FIG. 1, along the sectional plane 1V-1V shown in FIG. 1, according to the sectional plane 111-111 illustrated in FIG. FIG. 5 illustrates a light module according to a second embodiment of the invention, in a sectional view similar to that of FIG. 3.

In the figures, the elements common to several figures retain the same reference.

In the remainder of the description, the longitudinal, vertical and transverse denominations refer to an axis in relation to the general direction of the rays emitted by the light source. The longitudinal direction corresponds to the general direction of the light rays emitted by the light source. The transverse direction corresponds to a direction perpendicular to the longitudinal direction and parallel to the face of the plate accommodating the elements of the light module. The vertical direction is the direction perpendicular to the transverse direction and the longitudinal direction.

The directions mentioned above are also visible in an LVT trihedron shown in the figures.

The light module 1 comprises at least one light source 6, a projection lens 4 designed to project outside the module at least a portion of the light rays emitted by the light source 6, a plate 2, and one or more intermediate optical elements 3 , 5 arranged between the projection lens 4 and the plate 2, each element being supported by the plate 2.

The light source (s), the intermediate optical element (s) and the projection lens are arranged one after the other in the longitudinal direction.

As will be described hereinafter, the intermediate optical element or elements 3, 5 comprise at least one portion or holding section 38, 53 in position of the projection lens 4 on the plate 2. The portion or holding section 38 , 53 makes it possible to ensure the correct position of the projection lens 4 with respect to the light source 6 via the common reference frame of the support 2, without resorting to additional fastening elements such as screws, glue or any other fastening element.

A first embodiment will first be described, with particular reference to FIGS. 1 to 4, in which the light module 1 has two intermediate optical elements 3, 5 arranged between the light source and the projection lens, and which a first intermediate optical element 5 is an additional lens and a second intermediate optical element 3 is a curtain.

In the example illustrated, the module comprises four light sources 6. The light sources 6 are arranged at a first longitudinal axial end 201 of the light module 1 and the plate 2, opposite the projection lens 4 which is arranged at a second longitudinal axial end of the light module and the plate.

The plate 2 serves to support the cover 3, the projection lens 4 and the additional lens 5.

At least the projection lens 4 is placed on the plate 2 while an intermediate optical element 3, 5 is fixed on this plate by an independent member. In the illustrated embodiment, the intermediate optical element fixed by the independent member is the cover 3. The independent member may be a screw or glue.

The plate 2 has the general shape of a plate 202 of small thickness, extended at a first axial end by a support wall 23 of the light source or sources. By thickness of the plate 2 is meant the dimension between a first face 20 of the plate 2 on which are arranged the different elements of the light module 1 and a second face opposite to this first face.

The support wall 23 extends perpendicular to the plate 2, having a first face facing the projection lens 4, the light sources 6 being disposed on this first face.

The plate of the plate 2 comprises a first groove 21, arranged on the first face 20 substantially in the vicinity of the second axial end of the plate, forming a thin imprint which extends transversely, that is to say substantially perpendicular to the longitudinal direction along which are successively arranged the source, the intermediate optical element and the projection lens. The first groove 21 comprises a bottom wall defining the depth of the cavity and the side walls defining the shape of the cavity. The first groove 21 comprises three bosses 210, arranged respectively projecting from the bottom wall of the first groove 21. Two of the bosses 210 are each located at a transverse end of the first groove 21, the third boss 210 being located between the two other bosses 210, substantially in the center of the first groove 21.

The plate 2 comprises a second groove 22 also arranged on the first face 20 of the plate, forming a small cavity which extends transversely and substantially parallel to the first groove 21 between the first groove 21 and the support wall 23. The second groove 22 comprises a bottom wall defining the depth of the cavity and side walls defining the shape of the cavity.

The second groove 22 comprises two bosses 220, arranged respectively projecting from the bottom wall of the second groove 22. The bosses 220 are each located at a transverse axial end of the second groove 22.

The plate 2 further comprises centering holes for improving the positioning of at least the projection lens 4 and / or the additional lens 5 on the plate 2. These centering holes have a shape and dimensions complementary to those centering pins positioned on the face of the projection lens 4 and that of the additional lens brought into contact with the plate 2. Where appropriate, a centering hole may have a larger dimension to facilitate the taking into account. manufacturing games and allow the insertion of the centering pins.

The plate 2 comprises a radiator 24 which is arranged on the second face of the light source support 23, opposite the first face comprising the light sources 6. The radiator 24 is arranged to dissipate the heat produced by the light sources 6 For this purpose, the radiator 24 comprises a set of vertically oriented fins, but it will be understood that any configuration capable of effectively dissipating heat can be envisaged. Furthermore, the radiator 24 is shown here made from material with the plate 2, but it can advantageously be attached to the plate 2.

The projection lens 4 has an optical portion and a positioning portion. The optical portion takes the form of a lens having an input face 41 of the light rays and an output face 42 of the light rays through which the light module 1 emits the rays emitted by the light sources 6. the illustrated example, the lens is a convex plane lens having an essentially flat input face 41 and a curved exit face 42.

The positioning portion comprises a positioning tab 44, which has a complementary shape or substantially complementary to that of the first groove 21, so as to be housed in this first groove at the time of assembly. The positioning tab 44 comprises a lower face 44L which is in contact with the bottom wall of the first groove, and an upper face 442 opposite to the lower face.

The first groove 21 of the plate 2 is thus arranged to receive the positioning tab 44 of the projection lens 4, and in the mounted position, the positioning tab 44, and more particularly its lower face 44L is positioned on the bosses 210, formed in the first groove 21. Therefore, the projection lens 4 is placed on the plate 2. By posed, it means that it does not include a clean fixing element.

The additional lens 5, arranged between the light source 6 and the projection lens 4, has the role of modifying the path of the rays emitted by the light source so that they impart the projection lens 4 with an appropriate angle of incidence, the projection lens being in the illustrated example curved about a vertical axis perpendicular to the main direction of radiation emission. The additional lens 5 is arranged on the plate 2, between the projection lens 4 and the cover 3. It comprises on the one hand a base 51 comprising a positioning element 52 and a holding section 53, and secondly on the other side. at least one optical wall 54 extending substantially projecting from the base. The positioning element 52 has a shape complementary or substantially complementary to the shape of the second groove 22 of the plate 2. The positioning element 52 has a bottom face 521, which is in contact with the bottom wall of the second groove 22, rt an upper face 522 opposite to the underside. The second groove 22 of the plate 2 is thus arranged to receive the positioning element 52 of the additional lens 5, and in the mounted position, the positioning element 52, and more particularly its lower face 521, is positioned on the bosses 220 formed in the second groove 22. As a result, the additional lens 5 is placed on the plate 2. By posed, it means that it does not include a clean fastener.

The holding section 53 is configured so that, in this position of the additional lens placed on the plate 2, rt when the projection lens 4 is previously placed on the plate, this holding section 53 collaborates with the paw of positioning 44 of the projection lens 4 to maintain in position the projection lens 4. In particular, the holding section 53 extends towards the projection lens 4 so as to cover the positioning tab 44, and more particularly the face 442 upper this positioning tab, thereby preventing it from leaving the housing defined by the first groove 21.

The positioning of the additional lens thus participates in fixing the lens on the plate without additional screwing or bonding means necessary.

The additional lens 5 comprises at least one optical wall 54 acting as an optical element for deflecting the light rays passing therethrough. In the illustrated example, such as in particular visible in Figure 1, the additional lens 5 comprises four optical walls 54. The four optical walls 54 extend perpendicularly from the base 5L and present at the junction of their free ends 542, c i.e. at the junction of their opposite ends to the base, a plurality of notches 55 arranged regularly in a transverse series.

The optical walls 54 are essentially aligned transversely, that is to say perpendicularly to the general direction of the rays emitted by the light sources 6, each having an input face 540 facing the corresponding light source and an output face 541 turned towards the projection lens, here common to each of these optical walls.

Thus, each of the optical walls 54 is arranged to collaborate with one of the light sources 6 and the projection lens 4 to project the light rays in a controlled manner.

The cover comprises a base 37 brought to be in contact with the plate 2, and a plurality of partitioning walls 35, here three in number, ensuring the role of separation of the rays emitted by the different light sources 6. The partitioning walls 35 extend perpendicularly to the base 37, in the form of a transverse series of longitudinal walls.

The cover 3 is configured to have a holding portion 38 adapted to collaborate with the positioning element 52 of the additional lens 5 to hold the additional lens 5 against the plate 2. The holding portion 38 is formed by the base 37, a lower face 371 covers the positioning element 52 of the additional lens 5, more particularly its upper face 522. In the example shown, the holding portion 38 may further comprise longitudinal extensions 39 of the walls 35, which extend beyond a longitudinal end edge of the base 37, these longitudinal extensions 39 protruding from the base to extend, when the cover 3 and the additional lens 5 are in position on the plate 2, facing the base 51 and thus forming an additional stop against the release of the additional lens 5.

This covering thus prevents the positioning element from coming out of the housing delimited by the second groove 22. Thus, the cover 3 indirectly participates by this means in maintaining the projection lens 4 on the plate 2, since it is understood that when the cover 3 is fixed on the plate, it blocks in position the additional lens 5, which consequently blocks in position the projection lens 4.

In order to take into account the manufacturing tolerances and to allow assembly of the assembly, provision is made for a mounting clearance between the positioning element 52 and the second groove 22. In order to prevent this mounting set from disturbing the positioning of the assemblies, elements between them and the operation of the light module according to the invention, the positioning element 52 and the shell 3 respectively comprise one or more complementary indexing means 59 whose interaction allows a relative adjustment of the parts between them, whatever the play due to manufacturing and assembly tolerances.

The cuff 3 further comprises at least one axial extension finger 36 extending substantially longitudinally a partition wall 35 of the coke. It will be noted that in the illustrated example, the cuff 3 comprises three fingers of axial extension 36. These axially extending fingers 36 extend from the free end 351 of the partition walls 35, in a direction parallel to the general direction of propagation of the rays emitted by the light source 6, and these fingers of axial extension 36 extend towards the additional lens 5 and the projection lens 4 when the coffin is placed on the plate 2. The extension fingers Axial projections 36 may have different dimensions, and in the example illustrated, there is a central axial extension finger and two lateral axial extension fingers.

When the additional lens 5 is placed against the plate 2 and the cap is attached to block the position of the additional lens, the axial extension fingers 36 cooperate with the notches 55 formed respectively at the junction of two successive optical walls 54 . The fingers of axial extension 36 enter the notches 55 and press on the additional lens 5.

In the example of the invention, the notches 55 have a crenellated section, but they may have a section of other shape, since this shape allows shape cooperation with that of the fingers of axial extension 36 .

The central axial extension finger, disposed between the two lateral axial extension fingers extends to the corresponding central notch 55 and only participates in the maintenance of the additional lens 5 on the plate 2, while the fingers lateral axial extension extends beyond the corresponding notch 55 until it comes into contact with the entry face 41 of the projection lens 4, thus participating in the holding of the projection lens 4 on the stage 2.

The shell 3 is fixed on the plate 2 by one or more independent fixing elements, here two fixing screws 7, the shell comprising for this purpose two bores 32. It is understood that one could, without leaving the context of the invention, choose another method of fixing the cover, or a different number of fixing screws and corresponding bores.

Each fixing screw 7 collaborates with a bore 32 of the cover 3 and a threaded bore 26 of the plate 2. A dimension of the bore 32 of the cover larger than that of the corresponding threaded bore 26 of the plate, to facilitate the correspondence between the fixing screw and the threaded bore.

The position of the cover 3 on the plate 2 is thus ensured and maintained stably. The holding portion 38 of the cover then participates in the positioning of the positioning element 52 and the additional lens 5 on the plate 2, and by cascade effect, the holding section 53 of the additional lens 5 maintains its position. turn the positioning tab 44 and the projection lens 4 on the plate 2.

As illustrated in Figures 1, 3 and 5, the cover 3 may have a rib 34 disposed partially around the bore 32, between the latter and the light sources 6. These ribs 34 have an arc shape of circle surrounding the bores 32 and the height of the ribs 34 is defined to prevent the rays emitted by the light sources 6 to reflect on the screw heads 7 and become parasitic rays. The upper part of these ribs 34 is beveled to optimize the passage of rays closer to the screw head 7 without the rays reflected on it.

We will now describe a mode of assembly of the light module 1 according to the invention.

The projection lens 4 is placed on the plate 2, more precisely on a portion placed essentially at the second longitudinal end of the plate 2, so that the positioning tab 44 is placed in the first groove 21.

A first intermediate optical element 5, here an additional lens 5, is placed on the plate 2 between the projection lens 4 and the support of the light sources 23, so that the base 51 is in contact with the plate 2, with the holding section 53 extending over the positioning tab 44 of the projection lens 4, and the positioning element 52 being placed in the second groove 22.

A second intermediate optical element 3, here a mask 3, is placed on the plate 2 between the first intermediate optical element 5 and the light source support 23. The base 37 of the mask is in contact with the plate 2 and the portion of 38 extends over the positioning element 52 of the first intermediate optical element 5. The axial extension fingers 36 fit into the notches 55, thus pressing on the additional lens 5. The axial ends of the extension fingers lateral radials come into contact with the entry face 41 of the projection lens 4 and participate in its holding in position, by creating a high point of support, the opposite in the vertical direction of the recovery of the positioning tab 44 of the projection lens 4 by the holding section 53 of the additional lens 5. This avoids the possible release of the positioning tab by pivoting at the turn of a transverse axis.

The bores 32 of the cover 3 are aligned respectively with the threaded bores 26 of the plate 2, and they respectively receive one of the fixing screws 7. The second intermediate optical element 3 thus fixed holds in place the first intermediate optical element 5 on the plate 2, this first intermediate optical element 5 itself holding in place the projection lens 4 on the plate2.

Independently of these steps, the light sources 6 can be mounted at any time on the light source support 23.

We will now describe a second embodiment of the invention, which differs from the first embodiment previously described in that the light module 1 comprises a single intermediate optical element 3 disposed between the projection lens 4 and the light source 6 there where the light module according to the first mode had two. This intermediate optical element 3 is a cache.

It is understood that in this second embodiment, the shape of the projection lens makes it possible not to require the presence of an additional lens.

The plate 2 may thus contain only a groove 21 configured to receive the positioning tab 44 of the projection lens 4. The first part of the cover 3 helps maintain the projection lens 4 by extending and pressing at least a part of the positioning tab 44. Compared with the first embodiment, the first part of the cover 3 is extended more pronounced until reaching the positioning tab 44, the projection lens 4 being in a position substantially identical to that it occupies in the first embodiment, or the projection lens 4 is closer to the cover 3 at a location substantially identical to that the additional lens 5 occupies in the example of the first embodiment of embodiment, the first part of the cover 3 then extending substantially identically to the example of the first embodiment.

In accordance with the embodiment previously described, the cover 3 comprises at least one partitioning wall, here not visible in FIG. 5 because of the position of the cutting plane, and this or these partitioning walls can be extended respectively by a fingertip. axial extension 36 to participate in maintaining the projection lens 4.

The assembly is substantially the same as previously described. The projection lens 4 is placed on the plate 2, the positioning tab 44 in the single groove. The cuff 3 is then placed on the plate 2, its holding portion 38 coming to cover the positioning tab 44. The cuff 3 is then held in turn by the fastening elements 7 passing through the bores 32. As in the example in the first embodiment, the light sources 6 may be arranged on the light source support 23 at any time.

The other features and elements of the invention are identical or substantially identical to those set forth in the description of the first embodiment.

The embodiments described above are in no way limiting; it will be possible to imagine variants of the invention comprising only a selection of characteristics as described isolated from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the art. The invention described above allows the manufacture and assembly of a light module so as to limit the manufacturing tolerances and to facilitate the implementation of a light module according to the invention.

Claims (15)

1. Light module (1) comprising: - a light source (6); - a projection lens (4) for projecting at least a portion of the light rays emitted by the light source (6); - a plate (2) supporting the projection lens (4): - at least one intermediate optical element (3, 5) arranged between the projection lens (4) and the plate (2); characterized in that the intermediate optical element (3, 5) comprises at least one holding portion or section (38, 53) in position of the projection lens (4) on the plate (2) in that the lens of projection (4) comprises at least one locating tab (44) and in that the positioning tab (44) of the projection lens (4) rests on the plate (2) so that it is clamped between the plate (2) and the portion or holding section (38, 53) of the intermediate optical element (3, 5) involved in maintaining the position of the projection lens (4) on the plate (2). 2. Light module according to the preceding claim, characterized in that the light module (l) comprises at least one fastening element (7) of the intermediate optical element (3, 5) to the plate (2). 3. Light module according to any one of the preceding claims, characterized in that the portion or holding section (38, 53) of the intermediate optical element (3, 5) involved in maintaining the projection lens (4). is arranged in the part of the intermediate optical element (3, 5) in the direct vicinity of the plate (2). 4. Light module according to any one of claims 1 to 3, characterized in that an intermediate optical element (3, 5) comprises a cover (3) for intercepting another part of the light rays emitted by the light source ( 6). 5. Light module according to any one of claims 1 to 4, characterized in that an intermediate optical element (3, 5) comprises an additional lens (5) intended to collaborate with the light source (6) and the lens of projection (4) for projecting in a controlled manner the light rays emitted by the light source (6). 6. Light module according to one of claims 4 to 5, characterized in that the light module (1) comprises at least a first intermediate optical element (5) and a second intermediate optical element (3), the first intermediate optical element (5) having at least one holding section (53) of the projection lens (4) on the plate (2), the second intermediate optical element (3) having at least one holding portion (38) of the first optical element intermediate (5) on the plate (2). 7. Light module according to the preceding claim, characterized in that the second intermediate optical element (3) comprises at least one fastening element (7) to the plate (2). 8. Light module according to any one of claims 6 to 7 when dependent on claim 5, characterized in that the additional lens (5) comprises at least one positioning element (52). 9. Light module according to any one of claims 6 to 8 when dependent on claim 5, characterized in that the positioning element (52) of the additional lens (5) rests on the plate (2) of so that it is clamped between the plate (2) and a holding portion (38) of the cover (3) participating in maintaining the position of the additional lens (5) on the plate (2). 10. Light module according to any one of claims 6 to 9 when dependent on claim 4, characterized in that the cover (3) comprises at least one axial extension finger (36) towards the lens of projection (4) · 11. Light module according to claim 10 in combination with claims 4 and 5, characterized in that the additional lens (5) comprises at least one notch (55) for receiving the axial extension finger (36) of the cover ( 3), the axial extension finger (36) engaged in the notch (55) participating in the maintenance of the additional lens (5) on the plate (2). 12. Light module according to any one of claims 10 or 11, characterized in that the axial extension finger (36) of the cover (3) extends so as to be in contact with the projection lens (4). , so as to participate in maintaining the projection lens (4) on the plate (2). 13- Light module according to any one of claims 6 to 12, characterized in that the second intermediate optical element (3) comprises at least one rib (34) which surrounds at least partially the fastening element (7) to platinum (2) · 14. Vehicle headlight characterized in that it comprises at least one light module according to any one of the preceding claims. 15. A method of assembling a light module according to the invention, in which: placing a projection lens (4) on a plate (2), the plate (2) having a first groove (21) arranged to to accommodate a positioning tab (44) of the projection lens (4), an additional lens (5) is placed on the plate (2), the plate (2) comprising a second groove (22) arranged to receive an element of positioning (52) the additional lens (5), the additional lens (5) having a holding section (53) coming to cover the positioning tab (44) of the projection lens (4), a cover (3 ) on the plate (2), the cover (3) having a holding portion (38) coming to cover the positioning element (52) of the additional lens (5) is fixed the cover (3) on the plate (2 ) by means of at least one fastening element (7).