Optical vehicle unit comprising a referent light guide

Abstract

The invention relates to an optical unit (BO) with which a vehicle is equipped, the optical unit comprising at least a first mask (M1), a reflector (RP), a flat light guide (GL), and a circuit board (CE) provided with components participating in controlled generation of photons fed to the light guide (GL) with a view to participation in at least one photometric function. The first mask (M1), reflector (RP) and circuit board (CE) are positioned relative to and coupled to the light guide (GL), which serves as a reference part and participates with them (M1, RP, CE) in an assembled assembly (EA).

Description

DESCRIPTION TITLE: VEHICLE OPTICAL UNIT, WITH REFERENCE LIGHT GUIDE The present invention claims priority from French application 2311718 filed on 27.10.2023, the content of which (text, drawings and claims) is incorporated herein by reference. Technical field of the invention

[0001] The invention relates to optical units which are intended to equip vehicles and which must provide at least one photometric function. State of the art

[0002] Some vehicles, generally of the automobile type, comprise at least one optical unit comprising a housing in which are installed at least one mask, a reflector, a flat-type light guide, and an electronic card provided with components capable of participating in the controlled generation of photons to power the light guide to participate in at least one photometric function. For example, this photometric function may be a brake light and / or sidelight function.

[0003] Currently, in most of the optical blocks presented above, the light guide and the electronic board are secured to at least one dedicated support piece which is then fixedly installed inside the housing, and the mask(s) and the reflector are also fixedly installed inside the housing. In other words, the support piece serves as a reference piece for the precise relative positioning of the light guide with respect to the electronic board, and the housing serves as a reference piece for the precise relative positioning of the mask(s) and reflector with respect to the support piece and therefore with respect to the light guide.

[0004] This requires the provision of numerous fastening means, such as screws and clipping elements, and may also require welding and / or gluing operations. This results in a more complex architecture of the housing, and requires the provision of free spaces in the housing to allow welding, gluing, screwing and clipping operations to be carried out, which increases the volume of the optical unit and therefore makes it more difficult to integrate into a vehicle. In addition, this makes the assembly of the optical unit more complex and time-consuming, and therefore increases the manufacturing cost of this optical unit.

[0005] The invention therefore aims in particular to improve the situation. Presentation of the invention

[0006] For this purpose, it proposes in particular an optical unit, on the one hand, intended to equip a vehicle, and, on the other hand, comprising at least a first mask, a reflector, a flat-type light guide, and an electronic card provided with components capable of participating in a controlled generation of photons which must supply the light guide to participate in at least one photometric function.

[0007] This optical block is characterized by the fact that its first mask, reflector and electronic card are positioned in relation to, and coupled with, the light guide which serves as their reference part and participates with them in an assembled unit.

[0008] Thanks to the invention, the architecture of the housing is simpler and the assembly of the optical unit is significantly less complex and less time-consuming, which makes it possible, in particular, to reduce the manufacturing cost of the optical unit.

[0009] The optical unit according to the invention may include other characteristics which may be taken separately or in combination, and in particular:

[0010] - its light guide may comprise at least first, second and third coupling and / or positioning elements, its first mask may comprise fourth coupling and / or positioning elements capable of cooperating with the first coupling and / or positioning elements to position it and / or immobilize it relative to the light guide, its reflector may comprise fifth coupling and / or positioning elements capable of cooperating with the second coupling and / or positioning elements to position it and / or immobilize it relative to the light guide, and its electronic card may comprise sixth coupling and / or positioning elements capable of cooperating with the third coupling and / or positioning elements to position it and / or immobilize it relative to the light guide;

[0011] - in the presence of the first option, its light guide may comprise a first face provided with at least one rib defining by a first shape a first part of the first coupling and / or positioning elements dedicated to positioning and in which a second part of the first coupling and / or positioning elements is defined. In this case, its first mask may comprise a first wall, on the one hand, defining by a second shape a part of the fourth coupling and / or positioning elements, this second shape being substantially homologous to the first shape so that the first wall is placed substantially against the rib, and, on the other hand, provided with another part of the fourth coupling and / or positioning elements;

[0012] - in the presence of the last sub-option, the rib can define by the first shape at least part of the second coupling and / or positioning elements dedicated to positioning. In this case, its reflector can comprise a front part defining by a third shape at least part of the fifth coupling and / or positioning elements dedicated in positioning, this third shape being substantially homologous to the first shape so that the front part is placed substantially against the rib;

[0013] - its first mask may comprise a first internal face oriented towards a first face of the light guide. In this case, it may also comprise a second mask comprising a second internal face oriented towards a second face of the light guide, opposite the first face of the light guide, and positioned relative to, and coupled to, the light guide in order to participate in the assembled assembly;

[0014] - in the presence of the last sub-option, its light guide may comprise seventh coupling and / or positioning elements. In this case, its second mask may comprise eighth coupling and / or positioning elements capable of cooperating with the seventh coupling and / or positioning elements to position and / or immobilize it relative to the light guide;

[0015] - in the presence of the last sub-option, its light guide may include a technical wall equipped with the seventh coupling and / or positioning elements;

[0016] - also in the presence of the last sub-option, its second mask may comprise ninth coupling and / or positioning elements. In this case, its reflector may comprise a second wall provided with tenth coupling and / or positioning elements capable of cooperating with the ninth coupling and / or positioning elements to position and / or immobilize it relative to the second mask;

[0017] - its reflector and electronic card can be coupled together in order to define a pre-assembled sub-assembly constituting a sub-part of the assembled assembly;

[0018] - the photometric function can be a brake light and / or sidelight function.

[0019] The invention also proposes a vehicle, possibly of the automobile type, and comprising at least one optical unit of the type presented above. Brief description of the figures

[0020] Other characteristics and advantages of the invention will appear on examining the detailed description below, and the attached drawings (obtained in CAD / CAM (“Computer Aided Design / Computer Aided Drawing”)), in which:

[0021] [Fig. 1] schematically illustrates, in a perspective view from the front side, an exemplary embodiment of an assembled assembly of an exemplary optical unit according to the invention,

[0022] [Fig. 2] schematically illustrates, in a perspective view from the rear side, the light guide of the optical unit of Figure 1, before assembly,

[0023] [Fig. 3] schematically illustrates, in a perspective view from the rear side, a portion of the light guide of Figures 1 and 2, before assembly,

[0024] [Fig. 4] schematically illustrates, in a perspective view from the rear side, the light guides and first mask of the optical block of figure 1, before assembly,

[0025] [Fig. 5] schematically illustrates, in a perspective view from the rear side, a small part of the light guide and first mask of the optical block of figure 1, assembled together,

[0026] [Fig. 6] schematically illustrates, in a perspective view from the rear side, a part of the second mask of Figure 1, before assembly,

[0027] [Fig. 7] schematically illustrates, in a perspective view from above, the relative positioning of the reflector of Figure 1 with respect to the light guide, before assembly of the first and second masks and the electronic card.

[0028] [Fig. 8] schematically illustrates, in a perspective view from the rear side, a part of the assembled assembly of Figure 1, after assembly of the first and second masks to the light guide and just before assembly on the latter of the pre-assembled sub-assembly comprising the reflector, the electronic card and a heat shield,

[0029] [Fig. 9] schematically illustrates, in a perspective view from the rear side, a part of the assembled assembly of Figure 1, in the absence of the reflector, and

[0030] [Fig. 10] schematically illustrates, in a side perspective view and partially in section in a vertical and longitudinal plane, a part of the assembled assembly of figure 1. Detailed description of the invention

[0031] The invention aims in particular to propose an optical unit BO intended to equip a vehicle and capable of ensuring at least one photometric function by means of a flat type light guide GL and serving as a reference part (or referent) within an assembled assembly EA.

[0032] It is considered in the following, by way of non-limiting example, that the optical unit BO is intended to equip a motor vehicle, such as for example a car. But the invention is not limited to this type of vehicle. Indeed, the optical unit BO can equip any vehicle (land, sea (or river), or air) which must have at least one photometric function by means of a light guide.

[0033] Furthermore, it is considered in the following, by way of non-limiting example, that the optical unit BO constitutes a rear light of a vehicle. But it could constitute a front headlight (or projector) (when it also provides at least one photometric lighting function), or a front light of a vehicle, for example.

[0034] In the above and below, the notion of "front" is defined in relation to the place where the photons participating in a photometric function exit, and the notion of "back" is defined in relation to the place which is opposite to that where the photons participating in a photometric function exit. Consequently, the front face of an element is oriented outwards, while the back face of this element is oriented inwards and opposite to the front face.

[0035] In Figures 1 to 10, the X direction is intended to be parallel to the longitudinal direction of the vehicle, which is substantially parallel to the lateral (or longitudinal) sides comprising the side doors, the Y direction is intended to be parallel to the transverse direction of the vehicle and perpendicular to the longitudinal direction X, and the Z direction is intended to be parallel to the vertical direction of the vehicle and perpendicular to the longitudinal directions X and transverse directions Y.

[0036] Figure 1 schematically illustrates an example of an assembled assembly EA intended to form part of an example of an optical unit BO according to the invention, and more precisely to be installed in a housing (not illustrated) of the latter (BO), possibly upstream of a protective glass.

[0037] As illustrated at least partially in Figures 1 and 8 to 10, an assembled assembly EA of an optical block BO according to the invention comprises at least one light guide GL, a first mask M1, a reflector RD and an electronic card CE.

[0038] The CE electronic card is equipped with components (partially illustrated) which are suitable for participating in the controlled generation of photons which must supply the light guide GL in the vicinity of its rear face FR to participate in at least one photometric function.

[0039] For example, this photometric function can be a signaling function. As an illustrative example (and therefore not (limiting) this signaling function can be a stop light and / or sidelight function. But it could be a reversing light function or a turn indicator (or flashing) function, for example.

[0040] Also, for example, the electronic card CE may include at least one photon source, not illustrated, suitable for generating the photons which must participate in the photometric function and supplying the light guide GL, and components and / or electronic circuit(s) making it possible to control the power supply and operation of this (each) photon source.

[0041] Also for example, the (each) photon source may comprise at least one light-emitting diode (or LED). But alternatively the (each) photon source may comprise at least one laser diode or a gas laser.

[0042] Note that the choice of the (each) photon source may depend on the photometric function.

[0043] Also, for example, the CE electronic card can be a printed circuit board of the PCB type (“Printed Circuit Board”).

[0044] The light guide GL is of the flat type and is capable of participating in the (each) aforementioned photometric function when it is supplied with photons originating from the (each) photon source and reflected towards its rear face FR by the reflector RP. The latter (RP) therefore comprises at least one rear part located close to the rear face FR of the light guide GL and the area of ​​the electronic card CE comprising the (each) photon source, as illustrated non-limitingly in Figures 8 and 10.

[0045] It should be noted that the light guide GL is arranged in such a way as to guide the photons, which it receives at its rear face FR, towards a front face FV through which they exit to reach the outside, for example after passing through any protective glass.

[0046] In addition, the light guide GL is arranged so as to serve as a reference part (or referent) for the other elements of its assembled assembly EA, namely the first mask M1, the reflector RD and the electronic card CE, as well as possibly, as illustrated without limitation, a second mask M2 and a heat shield ET. Consequently, the first mask M1, the reflector RP and the electronic card CE (as well as possibly the second mask M2) are positioned relative to, and coupled to, the light guide GL. In this way, the light guide GL, the first mask M1, the reflector RD and the electronic card CE, as well as possibly the second mask M2 and the heat shield ET all participate in an assembled assembly EA.It will be understood that this assembled assembly EA can be handled without risk of detachment or partial disassembly of one of its elements, and can be assembled before arriving on an optical block manufacturing line, and therefore before being connected to the connectors and fixedly installed in the housing of an optical block BO.

[0047] This makes it possible to significantly reduce the number of fixing means that must be defined and / or used in the housing and to dispense with the dedicated support part. Consequently, the architecture of the housing is simpler and the assembly of the optical unit BO is significantly less complex and less time-consuming, and therefore the manufacturing cost of the optical unit BO is reduced. In addition, the invention makes it possible to constitute a compact assembled assembly EA, and therefore to reduce the volume of the optical unit BO, thus facilitating its integration into a vehicle.

[0048] In order to enable the production of the assembled assembly EA, the light guide GL may comprise at least first ECP1, second ECP2 and third ECP3 coupling and / or positioning elements, the first mask M1 may comprise fourth coupling and / or positioning elements ECP4, the reflector RP may comprise fifth coupling and / or positioning elements ECP5, and the electronic card CE may include sixth coupling and / or positioning elements ECP6, for example and as illustrated non-limitingly and at least partially in figures 2 to 4 and 6 to 10.

[0049] In the following and the preceding, the term "coupling and / or positioning element" means an element (or physical means) participating either only in a coupling, or only in a positioning, or even both in a coupling and in a positioning. Such an element may therefore be in the form of a through hole or a slot or a passage or a chute or a support tab or a clipping tab or a clipping hole or an element such as a rib having a particular shape, for example.

[0050] As illustrated non-limitingly and at least partially in Figures 2 to 4, the fourth coupling and / or positioning elements ECP4 of the first mask M1 are capable of cooperating with the first coupling and / or positioning elements ECP1 to position and / or immobilize the first mask M1 relative to the light guide GL.

[0051] In the example illustrated non-limitingly and at least partially in Figures 2 to 4, the first coupling and / or positioning elements ECP1 comprise at least two through holes and a passage (or chute) defined in at least one rib N (which will be discussed later), and the fourth coupling and / or positioning elements ECP4 comprise at least two tabs (or protuberances) and a finger passing respectively through the two through holes ECP1 and the passage ECP1. This makes it possible to ensure precise coupling and positioning in at least the transverse Y and vertical Z directions.

[0052] As illustrated non-limitingly and at least partially in figures 2 to 5, 7 and 8, the fifth coupling and / or positioning elements ECP5 of the reflector RP are capable of cooperating with the second coupling and / or positioning elements ECP2 for positioning and / or immobilizing the reflector RP relative to the light guide GL.

[0053] In the example illustrated non-limitingly and at least partially in Figures 2 to 5, 7 and 8, the second coupling and / or positioning elements ECP2 comprise at least five first zones delimited by at least one (the) rib N, and the fifth coupling and / or positioning elements ECP5 comprise at least five second zones defined in a front part of the reflector RP and of shapes substantially homologous respectively to the shapes of the first five zones ECP2 so as to be housed precisely in the latter (ECP2). This makes it possible to ensure precise coupling and positioning in the longitudinal X, transverse Y and vertical Z directions.

[0054] As illustrated non-limitingly and at least partially in figures 2 to 5, 8 and 9, the sixth coupling and / or positioning elements ECP6 of the electronic card CE are capable of cooperating with the third coupling and / or positioning elements ECP3 to position and / or immobilize the electronic card CE relative to the light guide GL.

[0055] In the example illustrated non-limitingly and at least partially in Figures 2 to 5, 8 and 9, the third coupling and / or positioning elements ECP3 comprise at least three support tabs PS, and the sixth coupling and / or positioning elements ECP6 comprise at least three third zones defined in a front part of the electronic card CE and capable of resting respectively on the support tabs PS. These support tabs PS can be defined on a technical wall PTG that the light guide GL comprises, for example in its rear part comprising its rear face FR.

[0056] It will be noted that in the example illustrated non-limitingly and at least partially in Figure 9, the third elements of coupling and / or positioning ECP3 also comprise at least three stops BP on which at least three fourth zones ECP6' respectively rest, defined in a front part of the electronic card CE and capable of abutting respectively against the stops BP. For this purpose, the fourth zones ECP6' may be notches defined in the front part of the electronic card CE and defining housings for the stops BP. This makes it possible to reinforce the coupling and the precise positioning of the electronic card CE in the longitudinal X and transverse Y directions relative to the light guide GL. The three stops BP may be defined on the technical wall PTG of the light guide GL, respectively near the support lugs PS.

[0057] Also for example, and as illustrated non-limitingly and at least partially in figures 2 to 5, 8 and 9, the light guide GL may comprise a first face FG1 provided with at least one (the) rib N which defines by its first shape a first part of the first coupling and / or positioning elements ECP1 which is dedicated to the positioning of a first wall PM1 (rear) of the first mask M1, and in which is defined a second part of the first coupling and / or positioning elements ECP1 (namely here the two through holes and the passage), as indicated above.In this case, the first mask M1 may comprise the first wall PM1, on the one hand, which defines by its second shape a part of the fourth coupling and / or positioning elements ECP4, this second shape being substantially homologous to the first shape so that the first rear wall PM1 is placed substantially against the rib N, and, on the other hand, provided with another part of the fourth coupling and / or positioning elements ECP4 (namely here the two tabs and the finger).

[0058] Note that in the illustrated example only a single rib N of long length is defined on the first face FG1 of the guide of light GL, but several (at least two) ribs could be defined on this first face FG1.

[0059] It will also be noted that in the illustrated example the front part of the light guide GL is intended to be installed substantially horizontally (XY plane), and the first mask M1 is installed above the first face FG1 which is therefore an upper face of the light guide GL. The first mask M1 therefore comprises a first internal face FI1 installed opposite, and partly against, the first face FG1. But in a first variant, the first internal face FI1 of the first mask M1 could be installed opposite, and partly against, the second face FG2 of the light guide GL opposite its first face FG1 and therefore constituting a lower face of the light guide GL. In a second variant, the front part of the light guide GL could be intended to be installed substantially vertically (YZ plane), and in this case the first mask M1 could be installed to the left or to the right of the light guide GL.

[0060] Also for example, and as illustrated non-limitingly and at least partially in Figures 2 to 5, 8 and 9, the (each) rib N can define by its first shape at least a part of the second coupling and / or positioning elements ECP2 which is dedicated to positioning. In this case, the reflector RP can comprise a front part PVR which defines by its third shape at least a part of the fifth coupling and / or positioning elements ECP5 which is dedicated to positioning. This third shape is substantially homologous to the first shape so that the front part PVR of the reflector RP is placed substantially against the rib N. This makes it possible to ensure precise coupling and positioning of the reflector RP along the longitudinal X, transverse Y and vertical Z directions relative to the light guide GL.

[0061] Also for example, and as illustrated non-limitingly and at least partially in figures 1, 6, and 8 to 10, the assembly assembled assembly EA may comprise a second mask M2, as mentioned above. This second mask M2 comprises a second internal face FI2 oriented towards the second face FG2 of the light guide GL (opposite its first face FG1), and is positioned relative to, and coupled with, the light guide GL in order to participate in the assembled assembly EA. In this case, the light guide GL is partially framed by the first M1 and second M2 masks (here respectively on its first upper face FG1 and second lower face FG2). But, as indicated above, the assembled assembly EA could not comprise a second mask M2.

[0062] Also for example, and as illustrated non-limitingly and at least partially in Figures 2 to 6 and 9, the light guide GL may comprise seventh coupling and / or positioning elements ECP7, and the second mask M2 may comprise eighth coupling and / or positioning elements ECP8. The latter (ECP8) are capable of cooperating with the seventh coupling and / or positioning elements ECP7 to position and / or immobilize the second mask M2 relative to the light guide GL.

[0063] In the example illustrated non-limitingly and at least partially in Figures 2 to 5, 7 and 8, the seventh coupling and / or positioning elements ECP7 comprise at least two through holes and a slot, and the eighth coupling and / or positioning elements ECP8 comprise at least three tabs (or protrusions) passing respectively through the two through holes ECP7 and the slot ECP7. This makes it possible to ensure precise coupling and positioning in at least the transverse Y and vertical Z directions.

[0064] Also for example, and as illustrated non-limitingly and at least partially in figures 2 to 5 and 7 to 10, the technical wall PTG of the light guide GL can be provided with the seventh coupling and / or positioning elements ECP7.

[0065] Also for example, and as illustrated non-limitingly and at least partially in Figures 6 and 8 to 10, the second mask M2 may comprise ninth coupling and / or positioning elements ECP9, and the reflector RP may comprise a second wall PR2 provided with tenth coupling and / or positioning elements ECP10. The latter (ECP10) are capable of cooperating with the ninth coupling and / or positioning elements ECP9 to position and / or immobilize the reflector RP relative to the second mask M2. This arrangement advantageously makes it possible to fix the second mask M2 and the reflector RP in a fixed and simultaneous manner relative to the light guide GL.

[0066] In the example illustrated non-limitingly and at least partially in figures 6 and 8 to 10, the ninth coupling and / or positioning elements ECP9 comprise at least two tabs each comprising a clipping hole, and the tenth coupling and / or positioning elements ECP10 comprise in the rear part of the reflector RP at least two clipping tabs which clip into the corresponding ECP9 clipping holes.

[0067] It will be noted that in the example illustrated the front part of the electronic card CE also comprises at least two through holes TT which are crossed respectively by the clipping tabs ECP10 in order to allow the latter to clip into the corresponding clipping holes ECP9. This advantageously makes it possible to firmly secure the reflector RP and the second mask M2 relative to the electronic card CE, while immobilizing the electronic card CE relative to the light guide GL, and thus to reinforce the quality of the assembled assembly EA.

[0068] For example, and as illustrated non-limitingly in Figure 8, the reflector RP and the electronic card CE can be coupled together in order to define a pre-assembled sub-assembly constituting a sub-part of the assembled assembly EA. It will be understood that this pre-assembled sub-assembly is then assembled at least to the guide light guide GL, as well as possibly to the first mask M1 and / or to the possible second mask M2 which has / have been previously assembled to the light guide GL. This simplifies the complete assembly of the assembled assembly EA.

[0069] It will be noted that in the example illustrated non-limitingly in figures 1, 8 and 10 the pre-assembled sub-assembly also includes a heat shield ET fixedly secured, for example by clipping and / or screwing, to the face (here lower) of the electronic card CE which is opposite the reflector RP. But such a heat shield ET could be dispensed with.

[0070] It will also be noted that the first M1 and second M2 masks, the reflector RP and the light guide GL can be made by injection molding of rigid and preferably strong plastic material(s), such as for example polycarbonate (or PC). Similarly, the housing and the possible protective glass can be made by injection molding of a rigid and strong plastic material, such as for example polycarbonate (or PC).

Claims

CLAIMS

1. Optical unit (BO) suitable for equipping a vehicle and comprising at least a first mask (M1), a reflector (RP), a flat-type light guide (GL), and an electronic card (CE) provided with components suitable for participating in a controlled generation of photons to supply said light guide (GL) to participate in at least one photometric function, characterized in that said first mask (M1), reflector (RP) and electronic card (CE) are positioned relative to, and coupled to, said light guide (GL) which serves as a reference part for them and participates with them (M1, RP, CE) in an assembled assembly (EA).

2. Optical block according to claim 1, characterized in that i) said light guide (GL) comprises at least first (ECP1), second (ECP2) and third (ECP3) coupling and / or positioning elements, ii) said first mask (M1) comprises fourth coupling and / or positioning elements (ECP4) suitable for cooperating with said first coupling and / or positioning elements (ECP1) to position and / or immobilize it relative to said light guide (GL), ll) said reflector (RP) comprises fifth coupling and / or positioning elements (ECP5) suitable for cooperating with said second coupling and / or positioning elements (ECP2) to position and / or immobilize it relative to said light guide (GL),and iv) said electronic card (CE) comprises sixth coupling and / or positioning elements (ECP6) capable of cooperating with said third coupling and / or positioning elements (ECP3) to position and / or immobilize it relative to said light guide (GL).,

3. Optical block according to claim 2, characterized in that i) said light guide (GL) comprises a first face (FG1) provided with at least one rib (N) defining by a first shape a first part of said first coupling and / or positioning elements (ECP1) dedicated to positioning and in which is defined a second part of said first coupling and / or positioning elements (ECP1), and ii) said first mask (M1) comprises a first wall (PM1), on the one hand, defining by a second shape a part of said fourth coupling and / or positioning elements (ECP4), this second shape being substantially homologous to said first shape so that said first wall (PM1) is placed substantially against said rib (N), and, on the other hand, provided with another part of said fourth coupling and / or positioning elements (ECP4).

4. Optical unit according to claim 3, characterized in that i) said rib (N) defines by said first shape at least a part of said second coupling and / or positioning elements (ECP2) dedicated to positioning, and ii) said reflector (RP) comprises a front part (PVR) defining by a third shape at least a part of said fifth coupling and / or positioning elements (ECP5) dedicated to positioning, this third shape being substantially homologous to said first shape so that said front part (PVR) is placed substantially against said rib (N).

5. Optical block according to one of claims 1 to 4, characterized in that said first mask (M1) comprises a first internal face (FI1) oriented towards a first face (FG1) of said light guide (GL), and in that it comprises a second mask (M2) comprising a second internal face (FI2) oriented towards a second face (FG2) of said light guide (GL), opposite to said first face (FG1), and positioned relative to, and coupled to, said light guide (GL) in order to participate in said assembled assembly (EA).

6. Optical unit according to claim 5, characterized in that i) said light guide (GL) comprises seventh coupling and / or positioning elements (ECP7), and ii) said second mask (M2) comprises eighth coupling and / or positioning elements (ECP8) capable of cooperating with said seventh coupling and / or positioning elements (ECP7) to position and / or immobilize it relative to said light guide (GL).

7. Optical unit according to claim 6, characterized in that said light guide (GL) comprises a technical wall (PTG) provided with said seventh coupling and / or positioning elements (ECP7).

8. Optical unit according to claim 6 or 7, characterized in that said second mask (M2) comprises ninth coupling and / or positioning elements (ECP9), and in that said reflector (RP) comprises a second wall (PR2) provided with tenth coupling and / or positioning elements (ECP10) capable of cooperating with said ninth coupling and / or positioning elements (ECP9) to position and / or immobilize it relative to said second mask (M2).

9. Optical unit according to one of claims 1 to 8, characterized in that said reflector (RP) and electronic card (CE) are coupled together in order to define a pre-assembled sub-assembly constituting a sub-part of said assembled assembly (EA).

10. Vehicle, characterized in that it comprises at least one optical unit (BO) according to one of claims 1 to 9.

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