FUNCTIONAL DEVICE FOR A MOTOR VEHICLE

Description

[0001] The invention relates to the field of automobiles. More specifically, the invention relates to the field of shock absorption experienced by a functional device of a motor vehicle.

[0002] In the automotive field, recent lighting devices tend to become larger, in order to fully participate in the aesthetic appearance of the motor vehicle, both for front headlights and rear lights. A front headlight can now form a major part or even the entirety of the grille of a motor vehicle. Therefore, the surface area of ​​a lighting device likely to be subject to impact or shock increases.

[0003] Furthermore, in the context of semi-autonomous or autonomous navigation of a motor vehicle, it is becoming common to integrate into a lighting device of this vehicle one or more sensors capable of acquiring information relating to the environment of the vehicle. Therefore, the price of such a lighting device increases and the replacement costs in the event of damage caused by an impact or shock become prohibitive. In addition, the various elements contained in the lighting device, whether light modules or sensors, require precise adjustment. Thus, a simple impact or accidental contact with the lighting device can disrupt this adjustment so that a repair is then necessary.

[0004] There is therefore a need for a lighting device capable of absorbing or absorbing a shock or impact without this disturbing the internal arrangement and adjustment of the various elements it contains.

[0005] In particular, it is necessary that the damping of these shocks can be done in a repeatable and reversible manner without impacting the adjustment of the various elements it contains. On the other hand, it is necessary that vibrations, induced by the movement of the motor vehicle, do not cause or cause little disruption of the devices.

[0006] This issue can be extended to other devices or functional blocks, other than a lighting device, of a motor vehicle, and in particular devices for detecting the presence or position of an obstacle in the environment of the vehicle, radiators, fans or air conditioners, screens, panels or interfaces of the vehicle passenger compartment.

[0007] Documents US 4,466,646 A and DE 102 58 626 A1 disclose functional devices of a motor vehicle comprising a damping system according to the prior art.

[0008] The present invention is therefore placed in this context and aims to meet this need.

[0009] For these purposes, the invention relates to a functional device of a motor vehicle, comprising a plate, a housing and at least one functional module arranged in the housing, the housing being mounted movably on the plate by at least one elastically deformable member capable of returning the housing to a rest position, in which the plate comprises at least one stop and in which the or each elastically deformable member comprises a spring fixed to the housing and cooperating with the or one of said stops of the plate, characterized in that the spring comprises a torsion spring with two branches and two arms, each arm extending from one of the branches of said torsion spring, and coming into contact with a lateral face of the stop, on either side of the stop.

[0010] In the invention, the plate thus forms a rigid structure on which the housing is fixed. It may be an interior or exterior chassis of the motor vehicle or an intermediate frame interposed between this chassis and the housing. The functional module may be a light module intended for a road lighting function, light signaling or lighting of the interior of the motor vehicle, or a module for detecting the position and / or presence of an obstacle in the environment of the vehicle, such as a radar, a lidar or a camera, or a radiator, a fan or an air conditioner of the vehicle, or a gearbox, a screen or an interface of the passenger compartment of the vehicle. In the event of an impact on the functional device, the housing may then move back with respect to the plate which remains fixed.This recoil thus makes it possible to absorb the shock and therefore to avoid damaging the functional module and any other elements provided in the housing. The arms of the spring coming into contact with the lateral face on either side of the stop, the recoil of the housing with respect to the plate, under the force of the shock, thus causes a displacement of the arms, due to the contact with the stop, and therefore a deformation of the torsion spring thus causing the housing to return to its rest position. In addition, the combination of these arms and the lateral face of the stop thus makes it possible to define a variable, or even deliberately non-linear, behavior of the deformation of the torsion spring, for example to define a spring retention threshold below which the torsion spring deforms little or not at all.

[0011] The functional device may be a lighting device, in particular a front projector (also called a vehicle headlight), a rear light, a side or repeater light, an illuminated front grille, a light panel arranged on the front or rear face of the vehicle. This lighting device may comprise a functional module such as a lighting module intended for a road lighting function, when it is a front projector, light signaling or lighting of the interior of the motor vehicle, or a module for detecting the position and / or presence of an obstacle in the environment of the vehicle, such as a radar, a lidar or a camera, or a radiator, a fan, a screen or an interface of the passenger compartment of the vehicle.

[0012] This lighting device can therefore be a front projector (also called a vehicle headlight), a rear light, a side or repeater light, an illuminated front grille, a light panel arranged on the front or rear of the vehicle.

[0013] The functional device may also be any functional device comprising a functional module such as a vehicle air conditioner, or even a gearbox.

[0014] Advantageously, each arm extends from one of the branches of the spring at an angle with that branch so that the arms cross. In this way, the arms cross behind the stop, the spring being locked to that stop. If desired, each arm may extend from its branch at an angle such that the arms make an angle between them substantially equal to 45°.

[0015] Advantageously, said lateral face of the stop has a profile defining a cam cooperating with each of said arms. This cam makes it possible, on the one hand, to define a retention threshold of the spring and, on the other hand, to modulate the recoil force of the housing.

[0016] For example, the cam may be arranged so that the torsion spring undergoes deformation only if a force greater than a given threshold is exerted on the housing. This retention threshold makes it possible to avoid movements of the housing relative to the plate which would be likely to be caused by vibrations due to the movement of the motor vehicle.

[0017] Alternatively or cumulatively, the cam is arranged so that the change in the angle between the arms of the spring caused by a force exerted on the housing is non-linear. In other words, the deformation of the torsion spring, and therefore the restoring force exerted by this spring, is not linear and it is possible to control the way in which the housing moves back with respect to the plate and is returned to its rest position. For example, a cam profile could be determined allowing a significant recoil of the housing at the start of the stroke and then a smaller recoil approaching the end of the stroke. Alternatively, for example, a cam profile could be determined limiting the recoil of the housing at the start of the stroke and then allowing a greater recoil approaching the end of the stroke.

[0018] If desired, the side face of the stop may include a rim against which the said arms of the spring bear. The rim may extend, continuously or discontinuously, over all or part of the perimeter of the side face.

[0019] Advantageously, the end of each of the arms is curved to form a hook. This hook thus comes against the stop when the arm is moved apart to define an end-of-travel position of the spring. Preferably, the profile of the hook can be arranged to match the profile of the lateral face of the stop.

[0020] In one embodiment of the invention, the plate comprises members for fixing the functional device to a chassis of the vehicle and the plate comprises two guide members, the housing comprises at least two positioning members, each positioning member being associated with one of the guide members and being capable of coming into contact with at least one point of this associated guide member to define said rest position of the housing on the plate, the housing being mounted movably, according to at least three degrees of freedom, on the plate by said at least one elastically deformable member capable of returning the housing to said rest position.

[0021] In one embodiment of the invention, the stop is mounted in line with one of the guide members and the spring of said elastically deformable member is fixed to one of the positioning members. Advantageously, the torsion spring of said elastically deformable member is wound on said positioning member. According to this characteristic, the torsion spring thus forms a hinge allowing the pivoting of the housing with respect to the plate around an axis passing through this positioning member, in particular in the absence of any stress on this torsion spring.

[0022] Advantageously, the plate may comprise at least one other stop mounted in line with another guide member, and the functional device may comprise another elastically deformable member comprising a spring fixed to the housing and cooperating with this other stop, this spring comprises a torsion spring wound on another positioning member and two arms each extending from one of the branches of said torsion spring, each arm coming into contact with a lateral face of the stop.

[0023] Advantageously, the functional device may comprise at least one sensor capable of detecting the presence of an obstacle and possibly of estimating the position of said obstacle with respect to the motor vehicle. Said sensor may, for example, comprise a radar sensor, a lidar sensor or a camera.

[0024] Preferably, the housing may include an opening closed by a protective glass, the housing and the glass defining a closed volume in which the functional module is arranged.

[0025] A guide member is understood to mean a member arranged to guide a positioning member of the housing, which would have moved away from its rest position due to an impact on the functional device of its position and which is returned by the elastically deformable member, towards this rest position in which this guide member and this positioning member are in contact.

[0026] A guide member may, for example, be a recess provided in the plate, having, for example, one or more supporting walls, adjoining or opposite, with which a positioning member may come into contact. The recess may in particular have a “V” or a “U” profile.

[0027] A positioning member may, for example, be a lug extending from the housing and having a peripheral surface via which it can come into contact with a guide member. The lug may in particular have a cylindrical shape.

[0028] Advantageously, the plate can form a frame surrounding the housing, the guide members being arranged around the entire periphery of the frame. The frame could, for example, comprise a plurality of uprights, at least one guide member being arranged on each upright.

[0029] In an exemplary embodiment of the invention, the housing comprises at least three positioning members, called longitudinal, and the plate comprises at least three guide members, called longitudinal. Where appropriate, each of said longitudinal positioning members is capable of coming into contact with one of the longitudinal guide members so that the housing, in its rest position, is in plane support against the plate. For example, in the case where the functional device is a lighting device, the longitudinal guide members can define a substantially vertical plane to which an optical axis of the lighting device is perpendicular. In this case, the longitudinal positioning and guide members make it possible to ensure immobilization of the housing in its rest position along this optical axis.

[0030] If desired, the housing may comprise four longitudinal positioning members and four longitudinal guide members. This configuration is particularly suitable in the case where the functional device is a lighting device forming a major part, or even the entirety of the grille of the motor vehicle, the dimensions of the lighting device making it possible to identify a plane passing approximately through each of the longitudinal guide members. For example, it may be possible to envisage arranging two longitudinal positioning members on an upper upright of the plate and two longitudinal positioning members on a lower upright of the plate, these members being superimposed vertically two by two.

[0031] Advantageously, each of said longitudinal guide members of the plate comprises a recess formed in the plate and provided with a support wall, each of said longitudinal positioning members comprising a lug extending from the housing into the recess of one of the longitudinal guide members so that, in the rest position of the housing, a peripheral surface of said lug is in contact with the support wall of this recess. For example, each recess may have a V-shaped profile and each lug may have a cylindrical shape. Preferably, in the case where the functional device is a lighting device, said support wall may be a wall substantially normal to an optical axis of the lighting device. Alternatively, said support wall may be a wall oblique to an optical axis of the lighting device.

[0032] Alternatively or cumulatively, the housing comprises at least two positioning members, called lateral, and the plate comprises at least two guide members, called lateral. Where appropriate, each of said lateral positioning members is capable of coming into contact with one of the lateral guide members so that the housing is, in its rest position, in rectilinear linear connection with the plate. For example, in the case where the functional device is a lighting device, the lateral guide members may be arranged so that the rectilinear linear connection of the housing with the plate takes place in a substantially vertical direction, in particular so as to ensure immobilization of the housing in its rest position along a horizontal axis perpendicular to an optical axis of the lighting device.

[0033] Advantageously, at least two longitudinal positioning members are also lateral positioning members, and at least two longitudinal guide members are also lateral guide members, these positioning and guide members being said to be double. Where appropriate, the recess of each double guide member is provided with two adjoining support walls, and the lug of each double positioning member extends from the housing into one of said recesses of the double guide members so that, in the rest position of the housing, the peripheral surface of this lug is in contact with the two adjoining support walls of this recess.In the case where the functional device is a lighting device, the positioning members and the double guide members thus participate in immobilizing the housing in its rest position both along the optical axis of the lighting device and along a horizontal axis perpendicular to this optical axis.

[0034] Advantageously, the adjoining support walls of a recess may form an angle of approximately 90° between them. Where appropriate, the recess may have a V-shaped profile. Preferably, the height of the lug of each double positioning member may be substantially greater than that of the recess of the double guide member in which it extends, so that together they form a short centering type connection. This increases the capacity of the housing to move in several directions, or even to achieve complex trajectories.

[0035] If desired, each double guide member may have two teeth extending on either side of its recess.

[0036] According to a non-limiting example, the plate may comprise four stops each mounted in line with one of the longitudinal and double guide members and the functional device may comprise four elastically deformable members each comprising a spring fixed to one of the longitudinal and double guide members.

[0037] Alternatively or cumulatively, the housing comprises at least two positioning members, called vertical, and the plate comprises at least two guide members, called vertical. Where appropriate, each of said positioning members is capable of coming into contact with a guide member of the plate so that the housing is, in its rest position, in sliding connection with the plate. For example, the lateral guide members may be arranged so that the sliding connection operates in a substantially horizontal direction, in particular so as to ensure immobilization of the housing in its rest position along a substantially vertical axis.

[0038] Advantageously, each of said vertical guide members of the plate comprises a recess formed in the plate and provided with two opposite support walls and each of said vertical positioning members comprises a lug extending from the housing into the recess of a vertical guide member so that, in the rest position of the housing, a peripheral surface of said lug is in contact with the opposite support walls of said recess.

[0039] Where appropriate, the recess of each vertical guide member may have a U-shaped profile, the opposite support walls of this recess being substantially parallel to each other and being normal to a substantially vertical axis. Preferably, each vertical positioning member and the vertical guide member with which it cooperates may together form a short centering type connection.

[0040] Obviously, other types of connection may be designed for the longitudinal, transverse and vertical guide and positioning members without departing from the scope of the present invention. In particular, the number of guide members and positioning members for immobilizing the housing in its rest position in one of the directions mentioned above may vary and it may be possible to envisage a flat support type connection, a rectilinear linear type connection or even a sliding connection for immobilizing the housing in its rest position in one of the directions mentioned above.

[0041] In one embodiment of the invention, the functional device is arranged as a light device and the functional module is a light module.

[0042] Another object of the invention is a vehicle comprising a functional device according to the invention, the plate being fixed to the chassis of the vehicle and / or to the body of the vehicle.

[0043] The present invention is now described using examples which are purely illustrative and in no way limitative of the scope of the invention, and from the appended drawings, drawings in which the various figures represent: [ Fig. 1 ] represents, schematically and partially, a rear view of a functional device according to an embodiment of the invention; [ Fig. 2 ] represents, schematically and partially, a top view of the functional device of the [ Fig. 1 ] ; [ Fig. 3 ] represents, schematically and partially, a side view of the functional device of the [ Fig. 1 ] ; [ Fig. 4 ] represents, schematically and partially, an example of the embodiment of an elastically deformable member used in the functional device of the [ Fig. 1 ].

[0044] In the following description, elements that are identical, by structure or function, appearing in different figures retain, unless otherwise specified, the same references. In addition, the terms "longitudinal", "lateral", "vertical", "front", "rear", "top" and "bottom" must be interpreted in the context of the orientation of the light device as shown, corresponding to a normal use of the functional device, such as when it is mounted in a motor vehicle.

[0045] We have represented in [ Fig. 1 ] a functional device 1 of a motor vehicle according to one embodiment of the invention. The [ Fig. 2 ] represents a top view of the functional device 1 and the [ Fig. 3 ] represents a side view of the functional device 1.

[0046] In the example described, the functional device 1 is a lighting device 1 arranged in a left front headlight of a motor vehicle.

[0047] The lighting device 1 comprises a plate 2 comprising fixing members (not shown) for fixing the lighting device 1 to a chassis of the vehicle. These fixing members may for example consist of a plurality of fixing lugs extending from the plate 2 and intended to be screwed into a plurality of fixing points on the chassis.

[0048] The lighting device 1 also comprises a housing 3 closed by a protective glass 4, defining a closed volume inside which are arranged a plurality of lighting modules (not shown) and a sensor, for example of the lidar type, capable of detecting the presence of an obstacle and possibly estimating the position of said obstacle with respect to the motor vehicle. The lighting device 1 thus has an optical axis X, defined by the overall direction of emission of the lighting modules arranged in the housing 3. The housing 3 also extends transversely along a Y axis and vertically along a Z axis. These axes X, Y and Z have thus been reported on each of the [ Fig. 1] à [Fig. 3 ].

[0049] The plate 2 forms a frame through which the housing 3 passes, this frame forming a rigid structure via which the housing 3 is fixed to the luminous vehicle. The housing 3 is mounted movably, according to at least three degrees of freedom, on the plate 2, so that contact on the glass 4 can cause the housing to move back with respect to the plate 2, according to any translation and / or rotation. The luminous device 1 is however equipped with a plurality of elastically deformable members by which the housing 3 is connected to the plate 2, so that the housing 3 can be returned to an isostatic rest position with respect to the plate.

[0050] In order to define this isostatic rest position, the plate 2 comprises six guide members 51 to 56, distributed over the entire circumference of the frame. Two members 51 and 52 are arranged on an upper upright 21 of the plate 2, two members 53 and 54 are arranged on a lower upright 22 of the plate 2, and two members 55 and 56 are each arranged on a lateral upright 23, respectively 24, of the plate 2. The [ Fig. 2 ] shows enlargements of organs 51 and 52.

[0051] The guide members 51 to 54 are longitudinal guide members each comprising a recess provided in a rear wall of the plate 2. The guide members 52 and 54 are also lateral guide members, these members thus being said to be double.

[0052] The recesses of the members 51 and 53 have a V-shaped profile and are provided for this purpose with a support wall 51a, respectively 53a, vertical and substantially normal to the optical axis X. The recess of the member 51 is vertically superimposed with the recess of the member 53.

[0053] The recesses of the members 52 and 54 also have a V-shaped profile and are provided for this purpose with two supporting walls 52a and 52b, respectively 54a and 54b, adjoining, forming an angle of approximately 90° between them, and each extending vertically and obliquely to the optical axis X. The recess of the member 52 is vertically superimposed on the recess of the member 54.

[0054] The double guide members 52 and 54 each also comprise two teeth 52c, extending the support walls of their recess.

[0055] The guide members 55 and 56 are vertical guide members each comprising a recess provided in a rear wall of the plate 2. Each recess has a U-shaped profile and is provided for this purpose with two opposite support walls 55a and 55b, respectively 56a and 56b, parallel to each other and each extending horizontally while being normal to the Z axis. The recesses are also extended by teeth.

[0056] To cooperate with these guide members and in order to define the isostatic rest position of the housing 3, the housing 3 comprises six positioning members 61 to 66.

[0057] Each positioning member 61 to 66 comprises a cylindrically shaped lug extending from a peripheral wall of the housing and having a peripheral surface via which it can come into contact with one of the guide members 51 to 56. The lugs are thus distributed on the peripheral wall of the housing in a similar manner to the recesses of the guide members 51 to 56. The positioning members 61 and 63 are therefore longitudinal positioning members, the positioning members 62 and 64 are double positioning members, namely longitudinal and transverse, and the positioning members 65 and 66 are vertical positioning members.

[0058] The guide members and the positioning members, when in contact, thus form connections between the housing 3 and the plate 2 defining an isostatic position of the housing 3 on the plate 2.

[0059] More precisely, each of the lugs of the longitudinal and double positioning members 61 to 64 is capable of coming into contact with the support wall(s) of one of the longitudinal guide members 51 to 54 so that the housing 3 is, in its rest position, in plane support against the plate 2, along a plane that is substantially vertical and normal to the optical axis X of the light device. This connection makes it possible to ensure immobilization of the housing 3 in its rest position along this optical axis X.

[0060] Each of the lugs of the double positioning members 62 and 64 is also capable of coming into contact with the support walls of one of the double guide members 52 and 54 so that the housing 3 is, in its rest position, in rectilinear linear connection with the plate 2, in a substantially vertical direction. This connection makes it possible to ensure immobilization of the housing 3 in its rest position along the Y axis.

[0061] Each of the lugs of the vertical positioning members 65 and 66 is capable of coming into contact with the support walls of one of the vertical guide members 55 and 56 so that the housing is, in its rest position, in sliding connection with the plate, in a substantially horizontal direction parallel to the Y axis. This connection makes it possible to ensure immobilization of the housing 3 in its rest position along the Z axis.

[0062] It will be noted that for the recesses of the guide members 51 and 53, when the lug of the positioning member 61 and 63 is in contact with the bearing surface 51a, respectively 53a of this recess, there is a clearance between a second wall 51b of the “V” profile of this recess and this lug. Furthermore, the height of the lug of each double positioning member 62 and 64 is substantially greater than that of the recess of the associated double guide member 52 and 54, so that together they form a short centering type connection. The lugs of the vertical positioning members 65 and 66 are also dimensioned to form a short centering with the associated recesses. The housing 3 can thus move in several directions and can follow complex trajectories, without risking causing strong deformation stresses on the housing 3.

[0063] In order to allow the housing 3 to be returned to its rest position, the lighting device 1 comprises four elastically deformable members 7 connecting the housing 3 to the plate 2. The plate 2 comprises four stops 8, each provided in line with one of the guide members 51 to 54 and each elastically deformable member 7 comprises a spring fixed to one of the positioning members 61 to 64 and cooperating with one of said stops 8 of the plate.

[0064] In the [ Fig. 1] à [Fig. 3 ], only one of these organs 7 and only one of these stops 8 have been shown, for the sake of clarity, it being understood that these organs and these stops are identical and that the description which will be made of this organ 7 and of this stop 8, in connection with the [ Fig. 4 ], is applicable to all others.

[0065] The spring comprises a torsion spring 71 wound on the lug of the positioning member 62 and two arms 72 and 73 each extending from one of the branches of said torsion spring.

[0066] Each arm 72 and 73 comes into contact with a lateral face 81 of the stop 8, on either side of the stop.

[0067] Each arm 72 and 73 extends at an angle with the spring 71 so that the arms cross, behind the stop, at an angle between them substantially equal to 45°.

[0068] The recoil of the case 3 with respect to the plate 2, under the force of contact exerted on the crystal 4, thus causes a separation of the arms 72 and 73, due to the contact with the stop 8, and therefore a deformation of the torsion spring 71 thus causing the case 3 to return to its rest position.

[0069] The lateral face 81 of the stop 8 has a profile defining a cam cooperating with each of said arms 72 and 73. This cam is arranged on the one hand so that the torsion spring 71 undergoes a deformation only if a force greater than a given threshold is exerted on the housing 3. On the other hand, the cam is arranged so that the evolution of the angle between the arms 72 and 73 is non-linear with a force exerted on the housing. In other words, it is possible to control the way in which the housing moves back with respect to the plate and is returned to its rest position.

[0070] The lateral face 81 of the stop 8 has a rim 82 against which the arms 72 and 73 bear.

[0071] Finally, the end of each of the arms 72 and 73 is curved to form a hook 74 and 75 coming against the stop 8 to match the profile of the lateral face 81 and define an end-of-travel position of the spring.

[0072] The foregoing description clearly explains how the invention makes it possible to achieve the objectives it has set itself, namely to obtain a functional device capable of repeatably absorbing a shock, whatever the direction of this shock, without risking damaging or disrupting the various components it contains, by allowing the casing of this functional device to move back under the effect of the shock and then returning the casing to an isostatic rest position.

[0073] In any event, the invention cannot be limited to the embodiments specifically described in this document, and extends in particular to any equivalent means and to any technically operative combination of these means as defined by the appended claims. It will be possible in particular to envisage other types of functional devices than a light device, and in particular a detection device incorporating a radar, a lidar or a camera, or even a device intended to participate in a heating, ventilation and / or air conditioning function of the vehicle such as a radiator, a fan or an air conditioner, or even a device intended to be arranged in the passenger compartment of the vehicle such as a screen or an interface.

Claims

1. A functional device (1) of an automotive vehicle, comprising a plate (2), a housing (3) and at least one functional module arranged in the housing, the housing being movably mounted on the plate by at least one elastically deformable member (7) capable of returning the housing to a rest position, wherein the plate includes at least one stop (8) and wherein the or each elastically deformable member includes a spring fixed to the housing and cooperating with the or one of said stops of the plate, characterized in that the spring comprises a torsion spring (71) with two branches and two arms (72, 73), each arm (72, 73) extending from one of the branches of said torsion spring, and coming into contact with a lateral face (81) of the stop, on either side of the stop (8).

2. The functional device (1) according to the preceding claim, wherein each arm (72, 73) extends from one of the branches of the spring (71) at an angle to this branch so that the arms cross each other.

3. The functional device (1) according to one of the preceding claims, wherein said lateral face (81) of the stop (8) has a profile defining a cam cooperating with each of said arms (72, 73).

4. The functional device (1) according to the preceding claim, wherein the cam is arranged so that the torsion spring (71) undergoes deformation only if a force greater than a given threshold is exerted on the housing (3).

5. The functional device (1) according to the preceding claim, wherein the cam is arranged so that the evolution of the angle between the arms (72, 73) of the spring caused by a force exerted on the housing (3) is non-linear.

6. The functional device (1) according to one of the preceding claims, wherein the lateral face (81) of the stop (8) includes a rim (82) against which said arms (72, 73) of the spring rest.

7. The functional device (1) according to one of the preceding claims, wherein the end of each of the arms (72, 73) is curved to form a hook.

8. The functional device (1) according to one of the preceding claims, the plate (2) comprising means for fixing the functional device to a chassis of the vehicle, characterized in that the plate includes two guiding members (51, 52, 53, 54, 55, 56), in that the housing (3) includes at least two positioning members (61, 62, 63, 64, 65, 66), each positioning member being associated with one of the guiding members by being able to come into contact with at least one point of this associated guiding member to define said rest position of the housing on the plate, the housing being movably mounted, according to at least three degrees of freedom, on the plate by said at least one elastically deformable member (7) capable of returning the housing to said rest position.

9. The functional device (1) according to the preceding claim, wherein the stop (8) is mounted opposite one of the guiding members (51, 52, 53, 54, 55, 56) and wherein the spring of said elastically deformable member (7) is fixed on one of the positioning members (61, 62, 63, 64, 65, 66).

10. The functional device (1) according to the preceding claim, wherein the torsion spring (71) of said elastically deformable member (7) is wound on said positioning member (61, 62, 63, 64, 65, 66).

11. The functional device (1) according to the preceding claim, wherein the plate (2) forms a frame surrounding the housing, the guiding members (51, 52, 53, 54, 55, 56) being arranged around the entire perimeter of the frame.

12. The functional device (1) according to one of the preceding claims, characterized in that it is arranged as a lighting device and in that the functional module is a lighting module.

13. A vehicle comprising a functional device (1) according to any one of the preceding claims, the plate (2) being fixed to the chassis of the vehicle and / or to the bodywork of the vehicle.