Vehicle seat back and vehicle seat comprising such a back

Abstract

The utility model relates to a backrest (16) for a vehicle seat (11), comprising a backrest bracket (17) having side posts (171; 172) spaced apart from each other in a transverse direction (Y) of the backrest (16). 172), which is formed by side columns (171; the utility model relates to a vehicle seat (11) comprising a backrest bracket (17), a housing (50) carried by the backrest bracket (17, 171, 172), the housing (50) having a front face (50A) and a rear face (50B), where the front face (50A) faces an occupant of the vehicle seat (11), the rear face (50B) being opposite the front face (50A), and at least one light source (60) adapted to emit a light beam (FL2) towards one of the backrest bracket (17) and the housing (50), in particular towards the rear face (50B) of the housing (50).

Description

TECHNICAL FIELD

[0001] The present utility model relates to a backrest for a vehicle seat, in particular for a motor vehicle seat, and to a vehicle seat, in particular a motor vehicle seat, comprising such a backrest. BACKGROUND

[0002] It is known to produce seats that can adapt to the posture of an occupant or to changes in the posture of an occupant. In particular, EP-A-2755 855 discloses a seat whose backrest comprises a shell adapted to assume various configurations, between a configuration that accommodates the lordosis of the back of a seat occupant and a configuration that accommodates the kyphosis of the back of an occupant, in response to variable loads exerted by the back of an occupant, in particular loads exerted by the lumbar region of the back of an occupant.

[0003] It is also known from the unpublished application PCT / FR2022 / 052067 in the name of the applicant, a vehicle seat in which the backrest comprises a shell to which one or more devices adapted to provide a comfort or safety function for a seat occupant are also attached. SUMMARY

[0004] The present utility model aims to improve the visual appearance of a backrest of a vehicle seat.

[0005] To this end, a vehicle seat backrest, in particular for a motor vehicle, for a backrest of a vehicle seat, comprises:

[0006] - a backrest support comprising first and second side uprights spaced apart in the transverse direction of the backrest;

[0007] - a shell carried by the first and second side uprights, the shell having a front face intended to be directed towards an occupant of the vehicle seat, and a back face opposite the front face;

[0008] - at least one light source adapted to emit a light beam towards one of the backrest support and the shell, in particular towards the back face of the shell.

[0009] Thus, advantageously, the distance between the shell and the backrest support is highlighted and the shell and the backrest support are more clearly visually separated. The backrest can then appear to comprise a shell floating in front of the backrest support.

[0010] According to a preferred embodiment, the vehicle seat backrest can comprise one or more of the following features, used alone or in combination:

[0011] - the at least one light source is attached to one of the shell and the backrest support, in particular to the side uprights of the backrest support, preferably to each of the side uprights of the backrest support;

[0012] - At least one light source is attached to the decoration of the backrest support, particularly to the side post of the backrest support, and at least one light source is adapted to emit a light beam toward the housing, particularly toward the back of the housing;

[0013] - At least one light source is attached to the decoration of each side post of the backrest support, and each at least one light source is adapted to emit a beam of light toward the housing, particularly toward the back of the housing;

[0014] - Each at least one light source includes a light-emitting diode, preferably an array of light-emitting diodes, particularly a linear array of light-emitting diodes;

[0015] - The backrest also includes padding that at least partially contacts the front of the outer shell;

[0016] - The backrest also includes a padding cover that covers the front of the housing, preferably at least partially covering the back of the housing;

[0017] - The beam illuminates at least a portion of the covering on the back of the casing; and

[0018] - The housing is used to support the vehicle seat occupant via padding and / or covering (if appropriate). The housing is preferably deformable and / or movable relative to the first and second side pillars. The backrest preferably also includes two connecting rods, each pivotally mounted on the backrest support about a first axis, which preferably extends in a generally transverse direction of the backrest. Each connecting rod is also pivotally mounted on the housing about a second axis, which preferably extends in a generally transverse direction of the backrest. The housing is even more preferably connected to the backrest support on each side by ball joints.

[0019] According to another aspect, a vehicle seat, particularly a motor vehicle seat, is proposed, comprising the vehicle seat backrest and all combinations thereof as described above. Attached Figure Description

[0020] Other features, details, and advantages will become apparent after reading the following detailed description and analysis of the accompanying figures, among which:

[0021] Figure 1 A perspective view of the first vehicle seat is shown schematically.

[0022] Figure 2 schematically shown Figure 1 An exploded perspective view of the seat cushion of a vehicle.

[0023] Figure 3 The modular seat cushion is schematically shown in... Figure 1 Assembly on the seat cushion support of the vehicle seat shown.

[0024] Figure 4 schematically shownFigure 1 Longitudinal cross-sectional view of a first example seat cushion of the vehicle seat shown.

[0025] Figure 5 A perspective view of a first detail of the seat back of the seat assembly shown is shown. Figure 1 A perspective view of a seat detail of the seat assembly shown, with the cushion and cover peeled away to reveal the shell of the backrest upholstery.

[0026] Figure 6 A perspective view of a second detail of the seat back of the seat assembly shown is shown. Figure 1 A perspective view of a first detail of the seat back of the seat assembly shown is shown.

[0027] Figure 7 A perspective view of a second detail of the seat back of the seat assembly shown is shown. Figure 1 A perspective view of a second detail of the seat back of the seat assembly shown is shown.

[0028] Figure 8 A perspective view of a third detail of the seat back of the seat assembly shown is shown. Figure 1 A perspective view of a third detail of the seat back of the seat assembly shown is shown.

[0029] Figure 9 A cross-sectional detail of the seat back of the seat assembly shown is shown. Figure 1 A cross-sectional detail of the seat back of the seat assembly shown is shown.

[0030] Figure 10 A perspective view of a detail of the seat back of the seat assembly shown is shown. Figure 1 A perspective view of a detail of the seat back of the seat assembly shown is shown.DETAILED DESCRIPTION

[0031] In the various figures, like reference signs refer to like or similar elements. For simplicity, only elements that are helpful for understanding the described embodiments are shown in the figures and are described in detail below.

[0032] In the following description, when terms defining an absolute position are mentioned, such as the terms “front”, “back”, “upper”, “lower”, “left”, “right”, etc., or terms defining a relative position, such as the terms “above”, “below”, “upper part”, “lower part”, etc., or terms defining a direction, such as “horizontal”, “vertical”, etc., unless otherwise specified, refer to the orientation of the figures or to the orientation of the vehicle seat in its normal position of use.

[0033] In particular, the longitudinal direction X represents the longitudinal direction of the seat. The longitudinal direction of the seat is considered to be identical to the longitudinal direction of the motor vehicle in which the seat is installed. This longitudinal direction X corresponds to the normal direction of travel of the vehicle. The longitudinal direction X is horizontal. The transverse direction Y of the seat thus corresponds to the transverse or lateral direction of the motor vehicle. This transverse direction corresponds to the direction perpendicular to the normal direction of travel of the vehicle. The transverse direction Y is horizontal. Finally, the vertical direction Z is the vertical direction of the seat, which is perpendicular to the longitudinal direction and to the transverse direction.

[0034] Figure 1 A motor vehicle seat assembly 10 is schematically shown, comprising a vehicle seat 11 and a slide mechanism 12, the seat 11 being mounted on the slide mechanism 12.

[0035] The seat 11 comprises a seat cushion 13, a seat cushion bracket 14 and a modular seat cushion pad 15 on which a backrest 16, a backrest bracket 17 and a backrest trim 18 are mounted. Here, the backrest bracket 17 is pivoted relative to the seat cushion bracket 14 about a transverse axis. To this end, a hinge mechanism can be arranged between the seat cushion bracket 14 and the backrest bracket 17 on each side of the backrest 17.

[0036] The seat cushion 13, in particular the seat cushion bracket 14, is mounted on a movable section (also referred to as a slide rail or convex section) via legs 19, 20. Each movable section is associated with a fixed section 21 to form a slide 22. The fixed sections 21 are also referred to as “rails” or “concave sections”. The fixed sections 21 are attached to the floor of the motor vehicle. The fixed sections 21 and the movable sections of the slide 22 can be metallic.

[0037] In the present embodiment, the seat 11 comprises buttons B for controlling the slide 22 and for adjusting other means of the position of the seat 11. Thus, one of the buttons B is configured to control the unlocking of the slide of the movable section relative to the respective fixed section 21 and an actuator for moving the movable section relative to the fixed section 21.

[0038] The seat 11 further comprises a headrest 23, as shown in the example. The headrest 23 comprises a headrest bracket and a headrest trim 24. The headrest bracket is connectable to the backrest bracket 17. For example, the headrest bracket can be integrally formed with the backrest bracket 17. In particular, the headrest bracket can be integrally formed with the backrest bracket 17 or attached, in particular rigidly attached, to the backrest bracket 17. Alternatively, the headrest bracket can be attached to the backrest bracket 17 by at least one headrest attachment rod, preferably two headrest attachment rods. The length of the headrest attachment rod can be variable to allow adjusting the height of the position of the headrest 23. Alternatively or additionally, the headrest bracket can be movable relative to the headrest bracket rod 23 to allow adjusting the height of the position of the headrest 23. The headrest trim 23 and / or the backrest trim 18 can cover all or part of the headrest attachment rod, for example, to improve the aesthetics of the vehicle seat 11.

[0039] In the following, a Figures 2 to 4 is described in more detail, which can be used for Figure 1 a first example of a vehicle seat cushion 13 of the vehicle seat 11 shown.

[0040] As previously mentioned, the seat cushion 13 has a modular seat cushion pad 15 configured to be attached to a seat cushion support 14. The seat cushion support 14 comprises two longitudinal members 141, 142, supported by a front transverse part 143 and a rear transverse part 144. Each longitudinal member 141, 142 can for example take the form of a flange. The transverse parts 143, 144 can for example take the form of tubes. Each longitudinal member 141, 142 can form a leg 19, 20 or be rigidly attached to a leg 19, 20.

[0041] The seat cushion support 14 can be made of metal or composite material, in particular filled with glass and / or carbon fibers. The seat cushion support 14 can be monolithic or consist of attached elements rigidly fixed together. The seat cushion support 14 can comprise a covering, for example in the form of a plastic shell, rigidly attached to at least one of the two longitudinal members 141, 142 and the two transverse parts 143, 144.

[0042] The modular seat cushion pad 15 comprises, in the assembled state, the parts shown in Figure 2

[0043] - a support 26, also called a decorative support, forming a base comprising a mechanical interface system for attachment to the seat cushion support 14,

[0044] - a padding 28, located on the upper surface of the support 26, intended to be oriented towards the occupant of the vehicle seat 11; and, here,

[0045] - a decorative covering 30 covering the padding 38.

[0046] The padding 26 makes the seat cushion 13 comfortable. The padding 26 can be based on polyurethane foam, generally obtained by molding, or on another material, for example forming looped fiber structures welded together, obtained by extruding thermoplastic fibers and calendering the fibers by two partially immersed members (rollers).

[0047] The mechanical interface system can for example comprise at least one, preferably each of the following:

[0048] - a rear mechanical interface located at the rear of the support 26, comprising a first open housing configured to house the rear transverse part 144 in a mechanically lockable manner by a locking system, in particular the rear mechanical interface. The locking system can be located inside the modular seat cushion pad 15, in particular inside the mechanical interface, and / or outside the rear mechanical interface, or even outside the modular seat cushion pad 15;

[0049] - a front mechanical interface located at the front of the support 26, comprising a second open housing configured to house the transverse part 143 in a pivotable manner around the transverse part 143. ​

[0050] Thus, the mechanical interface system can be configured to secure the modular cushion mattress 15 by implementing the following steps, as shown: Figure 3

[0051] i) aligning the front mechanical interface with the front transverse part 143 and inserting the front transverse part into the second housing;

[0052] ii) pivoting the support 26 around the front transverse part 143, then the front transverse part 143 engages in the second housing of the front mechanical interface until the rear transverse part 144 is inserted in the first housing of the rear mechanical interface; and

[0053] iii) mechanically locking the rear transverse part 144 in the first housing using the locking system.

[0054] The first housing and / or the second housing can generally be a U-shaped housing. The "U" shaped housing can be continuous in the transverse direction Y or can be obtained by a plurality of discontinuous sections along this transverse direction Y.

[0055] For example, the second recess is open towards the front of the support 26, i.e. in the longitudinal direction X, from the rear transverse part 144 of the cushion bracket 14 towards the front transverse part 143 of the cushion bracket 14. In particular, the second forwardly open housing ensures effective retention of the modular cushion mattress 15 in the event of a frontal impact. In this case, the impact force forces the front transverse part 143 of the cushion bracket 14 to reach the bottom of the second housing.

[0056] The first housing can be open towards the underside of the support 26, generally in the vertical direction Z. In the event of an impact, the first housing helps to retain the modular cushion mattress 15 by pressing the walls delimiting the first housing against the rear transverse part 144.

[0057] In the event of an impact, the constraint of the modular cushion mattress 15 and the occupant thereon relative to the cushion bracket 14 is substantially distributed between the front transverse part 143 and the rear transverse part 144 of the cushion bracket 14.

[0058] The direction of insertion of the rear transverse part 144 into the first housing and the direction of insertion of the front transverse part 143 into the second housing can be inclined relative to each other, for example by an angle of between 25° and 135°, in particular by an angle of between 45° and 90°.

[0059] ​The locking system of the rear mechanical interface can be elastically deformable, configured to allow elastic locking, such that at the end of the pivoting travel of the modular seat cushion around the front transverse member 143, locking of the rear transverse member 144 in the first housing is achieved by elastic deformation of the locking system of the rear mechanical interface. To this end, the first housing can be elastically deformable and comprise a recessed entrance of a smaller size than the cross section of the rear transverse member 144 and accommodate a central portion of the rear transverse member 144, which is in a locking position adjusted to the cross section of the rear transverse member 144.

[0060] The locking system can also comprise specific retaining members, such as protrusions. The operator can then attach the retaining members in a second step. In particular, it can be a locking system comprising one or more screws. The locking system can also comprise a latch.

[0061] According to another locking option, which can be combined with elastic locking, the rear transverse member 144 is locked in the first housing by positioning the backrest 16 or backrest element 16, such as a modular backrest cushion, on the backrest support and / or by positioning the backrest support 17 on the seat cushion support 14. Once the backrest element is fixed to the backrest support 16, the backrest element forms an upper stop, which cooperates with the rear portion of the modular seat cushion pad 15, preventing the rear transverse member 144 from leaving the first housing by pivoting the support 26 around the front transverse member 143.

[0062] The locking system can thus be located inside the modular seat cushion pad 15, or outside the modular seat cushion pad 15, or comprise a portion located inside the modular seat cushion pad 15 and a portion located outside it.

[0063] The support 26 of the modular seat cushion pad 15 can be a plastic element, such as a plastic element obtained by injection molding. The front and rear mechanical interfaces are preferably formed by the support 26, for example at the time of molding of the support 26.

[0064] The support 26 can form a frame. The frame can be configured to be supported on the seat cushion support 14, for example by being supported on at least one, preferably at least two, of the opposite longitudinal members 141, 142 and transverse members 143, 144 of the seat cushion support 14. For example, the frame formed by the support 26 can be supported only on the front and rear transverse members 143, 144 of the seat cushion support 14, only on the longitudinal members 141, 142, or both on the front and rear transverse members 143, 144 and on the longitudinal members 141, 142.

[0065] The support 26 can comprise a substantially flat central portion 32, here in the form of a perforated plate, from which at least one edge 34 extends, at the front end of the support 26. The edge 34 can be continuous around the entire contour of the support 26, thereby forming a skirt.

[0066] The central portion 32 of the support 26 can form a flexible suspension member, which is significantly more flexible than the peripheral frame of the support 26. The suspension member is for example in the form of a flexible perforated leaf. The suspension member can for example comprise blind or through recesses in the thickness of the central portion 32 of the support 26. The recesses are for example distributed uniformly in the longitudinal direction X and in the transverse direction Y of the vehicle seat 11. The surface porosity of the suspension member 15 is for example between 10% and 80%, in particular greater than 20%, even greater than 30%, even greater than 40%, even greater than 50%, in the presence of through recesses for example. The recesses contribute to the flexibility of the suspension member in the vertical direction Z. The recesses also contribute to reducing the weight of the support 26.

[0067] As illustrated, the support 26 advantageously does not present a metal suspension, the suspension being obtained solely by the central perforated portion 32 of the support 26. According to another embodiment, however, the support 26 can comprise a suspension, generally metallic, with spring wires, housed in recesses of a plastic part, for example forming the support frame on the cushion holder 14.

[0068] Figure 4 The details of the cushion 13 are presented. As Figure 4 illustrated, a light source 36, in particular a lamp, more particularly at least one light-emitting diode, for example an array of light-emitting diodes, is attached to the lower face 26i of the support 26, opposite the upper face 26s, in contact with the padding of the modular cushion mat 15. The light source 36 is for example overmoulded by the support 26 of the modular cushion mat 15.

[0069] Here, the light source 36 is attached in the angle formed by the edge 34 of the support 26 and the central portion 32 of the support 26. In this way, the edge 34 can limit the visibility of the light source 36 by a user of the vehicle seat 11.

[0070] The light source 36 is adapted to emit a light beam FL towards the cushion holder 14, in particular towards the ornament 145 of the cushion holder 14. The ornament 145 of the cushion holder 14 is for example in the form of a plastic casing, possibly composed of several parts fastened together.

[0071] To this end, the cover 38, which covers the padding of the modular cushion mat 15 and is attached to the support 26, does not cover the light source 36. Alternatively, the cover 38 can comprise a part made of a translucent or transparent material, in particular a translucent or transparent plastic, which covers the light source 36. In all cases, the cover 38 is designed to allow the light beam emitted by the light source 36 to pass through.

[0072] Here, the light beam FL emitted by the light source 36 illuminates a surface 40 of the upholstery of the cushion holder 14. The surface 40 is arranged at least partially below the support 26 of the modular cushion mat 15. In particular, here, the surface 40 illuminated by the light beam FL extends partially below the edge 34 of the support 26. The surface 40 illuminated by the light beam FL is located away from the modular cushion mat 15, in particular away from the support 26 of the modular cushion mat 15, in particular in the vertical direction Z. The surface 40 illuminated by the light beam FL is preferably concave. The surface 40 illuminated by the light beam FL is oriented towards the front of the vehicle seat 11. Thus, the surface 40 illuminated by the light beam FL is preferably visible from the front of the vehicle seat 11. The surface 40 illuminated by the light beam FL can also be visible from at least one side of the vehicle seat 11, preferably from both lateral sides of the vehicle seat 11. To this end, the upholstery 145 of the cushion holder 14 can be free of side parts extending vertically above the surface 40 illuminated by the light beam FL.

[0073] Thus, the surface 40 illuminated by the light beam FL makes the cushion 13, in particular the modular cushion mat 15, lighter than the conventional cushions described above. The illuminated surface 40 makes it easier to visually distinguish the modular cushion mat 15 from the cushion holder 14, wherein the modular cushion mat 15 appears to be floating above the cushion holder 14.

[0074] Furthermore, the surface 40 illuminated by the light beam FL can vary depending on the inclination of the cushion 13. Thus, the surface 40 illuminated by the light beam FL can allow the user to better visually grasp the inclination of the cushion 13, thereby facilitating the adjustment of the inclination of the cushion 13.

[0075] Reference is made below to Figures 5 to 10 to describe in more detail the modular cushion mat 15 that can be used Figure 1 in the example vehicle seat 11 shown.

[0076] As shown, the backrest support 17 comprises two tubular sections 41, 42. The two tubular sections 41, 42 are spaced apart in the longitudinal direction X of the seat 11. The first tubular section 41 is generally U-shaped, forming two generally parallel first uprights 43 and a cross member 44 connecting the two first uprights 43. The second tubular section 42 has two generally parallel second uprights 45, and a "V" shaped portion 46 connecting the two second uprights 45. The V-shaped portion forms a headrest support. On each lateral side of the backrest 16, the first uprights 43 are connected to the second uprights 45 by a first reinforcement plate 47 and a second reinforcement plate 48, and a third reinforcement plate 49. For example, each reinforcement plate 47, 48, 49 is welded to each associated first and second upright 43, 45. The first reinforcement plate 47 extends to an intermediate region of the uprights 43, 45 of the tubular sections 41, 42, here between the second and third reinforcement plates 48, 49. The second reinforcement plate 48 extends to a lower end (or free end) of the tubular sections 41, 42, for example. The third reinforcement plate 49 extends near a top end of the uprights 43, 45 of the tubular sections 41, 42, for example.

[0077] Thus, the backrest support 17 comprises two side uprights 171, 172, each side upright 171, 172 of the backrest support 17 comprising, according to the illustrated example:

[0078] - the first upright 43 of the first tubular section 41;

[0079] - the second upright 45 of the second tubular section 42;

[0080] - the first reinforcement plate 47;

[0081] - the second reinforcement plate 48; and

[0082] - the third reinforcement plate 49.

[0083] However, in another example, each side upright 171, 172 of the backrest support 17 can consist only of the first upright 43 of the first tubular section 41, the second upright 45 of the second tubular section 42 and a single reinforcement plate 47.

[0084] Alternatively, each side upright 171, 172 is formed by a flange, typically made of metal.

[0085] Furthermore, the backrest 16 comprises a shell 50 designed to support an occupant of the vehicle seat 11 via a cushion and a seat cover, if applicable. In particular, the shell 50 is suitable for supporting the back of an occupant of the seat 11. The shell 50 is supported by the backrest support 17. More particularly, the shell 50 is attached to the backrest support 17.

[0086] The shell 50 mainly extends transversely into the backrest 16 of the seat 11. The shell 50 has a front face 50A facing the occupant of the seat 11 and a back face 50B opposite the front face 50A. The front face 50A of the shell 50 can be covered with a padding and / or a seat covering, for example a seat cover. The padding can be based on polyurethane foam, usually obtained by molding, or on another material, for example forming looped fiber structures welded together, obtained by extruding thermoplastic fibers and calendering the fibers through two partially submerged members (rollers). The back face 50B of the shell 50 can not be covered with a padding or a seat covering. Thus, the back face 50B of the shell 50 is at least partially, if not entirely, visible to a passenger sitting behind the seat 11. Advantageously, the backrest 16 is free of padding covering the back face 50B of the shell 50. In this way, the space behind the shell 50 can be freely available to a passenger sitting behind the seat 11. In particular, such a space can improve the comfort of a passenger sitting behind the seat 11 by leaving more space for the knees of the passenger sitting behind the seat 11, which can be at least partially accommodated in the space behind the shell 50, in particular between the uprights 45 of the tubular section 42. To this end, the seat backrest 16 can be free of a rear trim element, for example a plate forming the back of the seat backrest 16 separate from the shell 50.

[0087] At the top, the shell 50 is directly attached to the first side upright 171 and to the second side upright 172 of the backrest support 17.

[0088] To this end, as Figure 6 illustrated, the first reinforcement plate 47 has a first face 51 (or inner face), in which the hinge member 52 implements a spherical connection. The first face 51 of each first reinforcement plate 47 faces the other first reinforcement plate 47, i.e. the interior of the vehicle seat 11. The first face 51 is substantially perpendicular to the transverse direction Y of the seat 11. The hinge member 52 extends from the first face 51 of the first reinforcement plate 47 in the transverse direction Y. The hinge member 52 has, for example, a substantially spherical or spherical portion, which is integrally formed with a cylindrical portion connecting the substantially spherical or spherical portion to the first face 51 of the first reinforcement plate 47. The hinge member 52 is, for example, a ball-and-socket joint. The hinge member 52 is housed in a complementary housing 53 formed on the back face 50B of the shell 50. Here, the housing 53 is delimited in a flange 54 of the shell 50, which extends above the back face 50B of the shell 50.

[0089] Furthermore, at the bottom, the shell 50 is connected to the backrest support 17 on both sides by a connecting rod 55.

[0090] On the one hand, as Figure 8As shown, each connecting rod 55 is pivotally mounted about a first axis that transversely crosses the housing 50. To this end, a pin 56 of the housing 50 extends along the transverse direction Y of the seat 11 and is housed in a complementary housing formed in the connecting rod 55. As shown, the pin 56 has a substantially cylindrical shape, for example. Figure 7 As shown, the pin 56 has a substantially cylindrical shape, for example.

[0091] On the other hand, each connecting rod 55 is pivotally mounted about a second transverse axis with respect to the uprights 171, 172 of the backrest support 17. To this end, a pin 58 is formed integrally with the second plate 48 and extends along the transverse direction Y of the vehicle seat 11 and is housed in a complementary housing 59 formed in the connecting rod 55. The pin 58 is substantially cylindrical, for example. The pin 58 is attached to the second plate 48, in particular welded or screwed to the second plate 48, for example. However, alternatively, the pin 58 is made of the same material as the second plate 48.

[0092] In this case, the housing 50 is also deformable. To improve the deformability of the housing 50, in particular in the area of the housing 50 for supporting the lumbar vertebrae of the occupant of the vehicle seat 11, the housing 50 has transverse slots, in particular in the lower part of the housing 50. The slots have at least one portion extending substantially parallel to the transverse direction Y of the vehicle seat 11. Each slot has a width of between 1 millimeter, preferably 2 millimeters, and 7 millimeters, preferably 6 millimeters. For example, each slot has a width of 5 millimeters.

[0093] Thus, the particular attachment of the housing 50 to the backrest support 17, combined with the flexibility of the housing 50, in particular the lower part of the housing 50, for supporting the lumbar vertebrae of the occupant of the vehicle seat 11, makes it possible to better adjust the vehicle seat, in particular the backrest 16 of the vehicle seat 11, to its occupant and to the position of the occupant in the vehicle seat 11.

[0094] Furthermore, as shown, Figure 5 As shown, the housing 50 has two recesses 59. Each recess 59 opens on the front face 50A of the housing 50. Each recess 59 is closed on the back face 50B of the housing 50. Here, each recess 59 has a frustoconical shape, facilitating the molding of the housing 50, in particular by injection molding. The housing 50 can be made of a material that can be shaped by molding. In particular, the housing 50 can be made of plastic, for example polyethylene (PE). The housing 50 has a minimum thickness of between 1 millimeter and 5 millimeters, in particular approximately 2.5 millimeters, for example. Furthermore, the frustoconical shape of the recesses 59 is particularly suitable for accommodating a vibration module, for example a haptic exciter (or exciter or vibrator or vibration device).

[0095] The design of the recesses 59 on the housing 50 can tend to reinforce the housing 50, which can limit the flexibility of the housing 50 in the vicinity of the recesses 59 and have a negative impact on the comfort of the occupant of the seat 11.

[0096] To limit this phenomenon, the slots in the shell 50 can be designed so that the flexibility of the shell 50 adapts to the different supported or non-supported areas of the occupant of the vehicle seat 11. Thus, the first slot can be substantially rectilinear and extend entirely outside the recess 59, substantially along the transverse direction Y of the vehicle seat 11. The second slot can have a curved portion to avoid the recess 59. Finally, the third slot can extend at least partially into the recess 59.

[0097] Likewise, to adapt the flexibility of the shell 50, the latter has stiffening protrusions near its lateral sides, to which the lateral modules, here for holding the occupant in the vehicle seat 11, can be attached. These modules are advantageously stiffer than the shell 50, in particular to ensure that the occupant remains in place.

[0098] Advantageously, the vehicle seat 11 does not comprise a rear trim, in particular a rear panel. This lightens the vehicle seat 11, which in turn reduces the fuel consumption of the motor vehicle equipped with the vehicle seat 11. As mentioned above, this leaves accessible space for the occupant of the seat located behind the vehicle seat 11, in particular for the knees of the occupant.

[0099] Thus, the shell 50 is a functional technical part which not only plays the role of cushion support, comfort support of the occupant of the vehicle seat, and support for devices for implementing comfort or safety functions, but also is a partly aesthetic appearance part which ensures the aesthetics of the vehicle seat 11. The shell 50 replaces the elastic support sheet which is usually used to support the vehicle seat backrest cushion. The shell 50 also serves as a support for the vehicle seat backrest cushion, or even as a cover for this cushion. The shell 50 also allows the use of comfort and / or safety devices of the vehicle seat which can be easily removed or replaced. Comfort devices can also be added during the entire lifetime of the vehicle seat backrest. The backrest of the vehicle seat can be adjusted to the needs of the occupant by adding or removing comfort devices. Finally, the shell 50 is made of plastic, as an appearance part, which is intended to ensure the aesthetics and comfort of the vehicle seat backrest. Thus, it is possible not to add any trim on the back of the vehicle seat backrest, so that the shell 46 is accessible and / or visible from the rear of the vehicle seat 11.

[0100] Figure 9 A detail of the backrest 16 is shown. As Figure 9As shown, a light source 60, in particular a lamp, more particularly at least one light emitting diode, for example a light emitting diode array, is attached to a front face 61 of the trim 175 of the backrest support 17, facing the housing 50, in particular the back face 50B of the housing 50. The light source 60 is for example housed in a casing 62 in the trim 175 of the backrest support 17. Here, the trim 175 of the backrest support 17 comprises two plastic shells 63, 64 which are elastically interlocked to form a substantially cylindrical casing for housing the upright 172 of the backrest support 17. The casing 62 can be closed on the front face facing the housing 50 by a translucent material plate.

[0101] The light source 60 is adapted to emit a light beam FL2 towards the housing 50, in particular towards a cover 65 covering at least a portion of the back face 50B of the housing 50. The cover 65 can consist of a plurality of sheets stitched together as shown, and can also cover a gasket in contact with the front face 50A of the housing 50. Figure 9

[0102] Here, the light beam FL2 emitted by the light source 60 illuminates a surface 66 on the back face 50B of the housing 50, which is here covered by the cover 65. Here, the surface 66 is convex, bulging along the curvature of the housing 50 towards its lateral end. The surface 66 illuminated by the light beam FL2 is preferably visible from the side of the vehicle seat 11. The surface 66 illuminated by the light beam FL2 can also be visible from the front of the vehicle seat 11.

[0103] Thus, the surface 66 illuminated by the light beam FL2 gives the backrest 16, in particular the housing 50, a feeling of lightness greater than a conventional backrest comprising a cover covering the entire upholstery and the backrest support. The illuminated surface 66 makes it easier to visually distinguish the housing 50 and the backrest support 17.

[0104] In addition, the surface 66 illuminated by the light beam FL2 can vary according to the inclination and / or deformation of the housing 50. Thus, the surface 66 illuminated by the light beam FL2 can give the user a better visual grasp of the inclination of the housing 50, thus facilitating the adjustment of the inclination of the housing 50.

[0105] Preferably, a light source 60 is associated with each upright 171, 172 of the backrest support 17, each light source 60 illuminating a surface of the housing 50 on the respective side of the housing 50.

[0106] The utility model is not limited to the above examples. On the contrary, a person skilled in the art can make many variants.

[0107] ​In particular, according to a variant, the light source 36 in the seat cushion is attached to the seat cushion support 14 and is adapted to emit a light beam toward the modular seat cushion mat 15, in particular toward the support 26 of the modular seat cushion mat 15, and more particularly toward the lower side 26i of the support 26 of the modular seat cushion mat 15.

[0108] In another variant, the light source 60 is attached to the shell 50 of the backrest 16 and is adapted to emit a light beam toward the backrest support 17, in particular toward the ornament 175 of the upright 171, 172 of the backrest support 17, so as to illuminate the surface of this ornament 175 of the backrest support 17.

Claims

1. Backrest (16) for a vehicle seat (11), comprising: - a backrest support (17) comprising a first side upright (171) and a second side upright (172), said first and second side uprights (171; 172) being spaced apart in a transverse direction (Y) of said backrest (16); - a shell (50) carried by said first and second side uprights (171; 172), said shell (50) having a front face (50A) intended to face an occupant of said vehicle seat (11), and a back face (50B) opposite said front face (50A); - at least one light source (60) adapted to emit a light beam (FL2) towards one of said backrest support (17) and said shell (50).

2. The backrest (16) according to claim 1, characterized in that Said at least one light source (60) is adapted to emit a light beam (FL2) towards the back face (50B) of said shell (50).

3. The backrest (16) according to claim 1, characterized in that Said at least one light source (60) is attached to one of said shell (50) and said backrest support (17).

4. The backrest (16) according to claim 3, characterized in that Said at least one light source (60) is attached to at least one side upright (171; 172) of said backrest support (17).

5. The backrest (16) according to claim 1, characterized in that Said at least one light source (60) is attached to a trim (175) of said backrest support (17).

6. The backrest (16) according to claim 5, characterized in that Said at least one light source (60) is attached to a trim (175) of a side upright (171; 172) of said backrest support (17).

7. The backrest (16) according to claim 5, characterized in that Said at least one light source (60) is adapted to emit a light beam (FL2) towards one of said front face (50A) of said shell (50) and said back face (50B) of said shell (50).

8. The backrest (16) according to claim 5, characterized in that Said at least one light source (60) is attached to a trim (175) of each side upright (171; 172) of said backrest support (17), each at least one light source (60) being adapted to emit a light beam (FL2) towards one of said front face (50A) of said shell and said back face (50B) of said shell (50).

9. The backrest (16) of claim 1, characterized in that Each at least one light source (60) comprises at least one light emitting diode.

10. Backrest (16) according to claim 1, further comprising a cushion at least partially in contact with said front face (50A) of said shell.

11. Backrest (16) according to claim 10, further comprising a cover (65) covering said cushion over said front face (50A) of said shell.

12. The backrest (16) according to claim 11, characterized in that Said cover (65) also at least partially covers said back face (50B) of said shell.

13. The backrest (16) according to claim 12, characterized in that Said light beam (FL2) illuminates at least a portion of said cover (65) on said back face (50B) of said shell (50).

14. The backrest (16) of claim 1, characterized in that Said shell (50) is for supporting a vehicle seat occupant.

15. The backrest (16) according to claim 10, characterized in that Said shell (50) is for supporting a vehicle seat occupant via said cushion.

16. The backrest (16) according to claim 11, characterized in that Said shell (50) is for supporting a vehicle seat occupant via said cushion and said cover (65).

17. The backrest (16) according to claim 14, characterized in that Said shell (50) is deformable.

18. The backrest (16) of claim 14, characterized in that Said shell (50) is movable relative to said first and second side uprights (171; 172).

19. Backrest (16) according to claim 18, comprising two connecting levers (55), each connecting lever (55) being pivotally mounted on the backrest carrier (17) about a first axis, which extends in a transverse direction (Y) of the backrest (16), each connecting lever (55) further being pivotally mounted on the housing (50) about a second axis, which extends in a transverse direction of the backrest (16).

20. The backrest (16) according to claim 19, characterized in that The housing (50) is connected to the backrest carrier (17) on each side by a spherical joint.

21. Vehicle seat (11) comprising a backrest (16) according to any one of the preceding claims.

Images