Cross beam for backrest, backrest for vehicle seat and vehicle seat

Abstract

The utility model discloses a cross beam for a backrest, the backrest for a vehicle seat and the vehicle seat. The proposed solution relates to a crossbeam (1) for a backrest (21), comprising: a transverse sheet (10) having a front side surface (OV) and a rear side surface (OR) facing away from the front side surface; and at least one headrest bracket (11) supported at a first support surface (101) on the front side surface (OV) of the transverse plate (10) and at a second support surface (102) on the rear side surface (OR) of the transverse plate (10).

Description

Technical Field

[0001] The proposed solutions involve crossbeams for backrests, backrests for vehicle seats, and vehicle seats. Background Technology

[0002] Vehicle seats are typically equipped with headrests. Seat users can rest their heads on such headrests, and especially in the event of a vehicle collision, the headrests can support the user's head to prevent injury.

[0003] Because the force and acceleration during a vehicle collision can be significant, the head can impact the headrest with considerable force. Therefore, the headrest's support structure is designed to withstand this load.

[0004] However, the corresponding stable design typically results in relatively high weight and / or relatively large structural space requirements. This often leads to a considerable thickness in the seat backs. However, the thickness of the seat back directly impacts the usable space inside the vehicle for passengers.

[0005] DE 10 2014 211 527 B4 describes a vehicle seat with a backrest having a crossbeam. The crossbeam is formed of a transverse plate, on which two headrest supports are tightly fitted. The headrest rods are housed in the headrest supports. In known vehicle seats, the transverse plate is bent into a C-shape, and each headrest support has two mutually aligned openings through which the headrest supports are inserted and welded. However, as previously described, the resulting box-like structural form would occupy a significant amount of structural space. Utility Model Content

[0006] The task was to improve the crossbeam of the backrest.

[0007] This task is accomplished by the crossbeam for the backrest as described in this invention.

[0008] Therefore, the crossbeam for the backrest includes: a transverse plate having a front surface and a rear surface opposite to the front surface; and at least one headrest bracket supported at a first support surface on the front surface of the transverse plate and at a second support surface on the rear surface of the transverse plate.

[0009] This is based on the understanding that by applying a load to the headrest at a distance from the headrest support, torque is introduced into the headrest support at the location where it is supported on the transverse panel. In this context, two improvements can be achieved simultaneously by supporting the headrest on one main side of the panel forming the transverse panel and on the other main side. The first improvement is that the encapsulation of the headrest support can be eliminated because the torque pushes the headrest support against its respective support surface. Therefore, the transverse panel can expose the headrest support on the side opposite to its respective support surface. Since the headrest support thus only experiences unilateral contact, a particularly flat backrest structure can be achieved. The second improvement is that the support on the surface of the transverse panel allows for particularly secure support, unlike the support on the edges of the panel in previously known transverse panels, which tends not to tear. Therefore, a stable crossbeam can be provided with a simple structure, and this crossbeam also reduces structural space requirements.

[0010] The headrest support can extend through an opening in the transverse plate. A first support surface can be arranged above the opening, while a second support surface can be arranged below the opening. This allows for a particularly flat structure and also safely intercepts torque applied from the rear to the headrest mounted on the headrest support.

[0011] The headrest support is welded to the transverse plate at the support surface, for example. This allows for a particularly secure connection. However, other connection methods are also conceivable, such as shape-locking and / or force-locking fastening methods. The headrest support can be made of metal, such as steel, wherein, alternatively, it can also be made of, for example, plastic.

[0012] For example, the headrest support is constructed in the form of a sleeve extending (e.g., vertically) along a longitudinal axis. Such a sleeve can securely and adjustably accommodate the headrest.

[0013] One option is to configure the headrest support to have a rectangular cross-section. This allows for a large area of ​​contact with the support surface, thus improving stability. Alternatively, the headrest support can be configured with a cross-section shaped in other ways, such as a circle.

[0014] The support surface can be flat. This allows for particularly secure support even in the case of a flat structure. Furthermore, the support surface can be shaped to correspond with the headrest support. For example, in the case of a circular headrest support, a support surface corresponding to a cylindrical section can be provided. It should be noted that other shapes are also conceivable.

[0015] The crossbeam can have two headrest supports, which are supported respectively at a first support surface on the front side of the transverse plate and a second support surface on the rear side of the transverse plate. This achieves stable holding of the headrest.

[0016] It can be configured such that the transverse plate has an opening for each headrest bracket, wherein the headrest bracket extends through the respective opening and is supported on a support surface of the transverse plate that is offset from (and for example parallel to) the opening on the opposite side of the opening (along the respective longitudinal axis of the headrest bracket).

[0017] The transverse panels may have support surfaces for supporting the transverse panels on the longitudinal struts of the backrest. Furthermore, the transverse panels may have reinforcements extending from one of the support surfaces for one of the headrest supports to one of the support surfaces for one of the longitudinal struts. This allows forces introduced via the support surfaces of the headrest supports to be dissipated particularly effectively.

[0018] According to an improved design, the reinforcements are constructed in the form of embossed ribs. This allows the reinforcements to be manufactured particularly easily and without the need for additional components. Alternatively, the reinforcements can also be constructed from attachments (e.g., in the form of wires, sheets, or the like, which can be assembled by form-locking, force-locking, and / or material-locking) mounted on the remaining transverse plates.

[0019] The reinforcing parts can extend in an arched manner, for example, in an S-shape. This can dissipate force particularly effectively.

[0020] The horizontal panels are constructed as a single piece. This allows for particularly simple and rapid manufacturing while maintaining high stability.

[0021] Furthermore, the transverse sheet metal can be constructed in the form of bent sheet metal sections, for example, from steel plates. This allows for rapid manufacturing.

[0022] According to one aspect, a crossbeam for a backrest is described, particularly a crossbeam for a backrest according to any of the preceding claims, the crossbeam having at least one receiving portion for a headrest support, wherein the receiving portion has an opening in which a headrest support can be arranged or disposed, and a support surface arranged offset from and parallel to the opening on the opposite side of the opening for supporting the headrest support. The advantages are described above.

[0023] One aspect describes a backrest for a vehicle seat, the backrest including a crossbeam according to any of the designs described herein. Regarding advantages, the aforementioned description of the crossbeam is referenced again.

[0024] For example, the backrest may include two longitudinal struts that are connected to the transverse panel at the support surface of the transverse panel, particularly by welding. This allows for a particularly stable backrest.

[0025] The longitudinal struts each have edges, wherein at least one headrest support of the crossbeam can be arranged between and / or at an angle to the two edges. This enables particularly secure support. Therefore, the edges do not require bends for aligning the headrest supports, thereby achieving improved load-bearing capacity.

[0026] Both edges of the longitudinal strut are, for example, straight, especially in the area of ​​the headrest (multiple) supports. The two edges of the longitudinal strut do not have bends, especially in the area of ​​the headrest (multiple) supports. This improves load-bearing capacity, especially in the event of a collision.

[0027] Multiple headrest supports can intersect with, or pass through, the (imaginary) plane formed by the two edges of the longitudinal strut. This can further improve the load-bearing capacity.

[0028] Both edges of the longitudinal strut are, for example, front edges and face the seat occupant who is leaning against the backrest as required. This allows for improved load-bearing capacity, especially in the event of a rear-end collision.

[0029] One aspect describes a vehicle seat comprising a backrest according to any of the designs described herein. Regarding advantages, the aforementioned description of the crossbeam is referenced again. Attached Figure Description

[0030] The basic concept of this utility model will now be explained in detail with reference to the embodiments shown in the accompanying drawings. Wherein:

[0031] Figure 1 A vehicle seat with a seating section and a backrest is shown;

[0032] Figure 2 It shows that according to Figure 1 A perspective view of the crossbeams and two longitudinal struts of the backrest of a vehicle seat.

[0033] Figure 3 It shows that according to Figure 2 A top view of the crossbeam and longitudinal struts;

[0034] Figure 4 It shows that according to Figure 2 Side view of the beam and longitudinal struts;

[0035] Figure 5 It shows crossing according to Figure 4 A sectional view of the beam;

[0036] Figure 6 It shows that according to Figure 5 A view of the cross-sectional plane;

[0037] Figure 7 A perspective view of the transverse plates of the beam is shown; and

[0038] Figure 8 It shows that according to Figure 1 A side view of the longitudinal struts of the backrest of a vehicle seat. Detailed Implementation

[0039] Figure 1 A vehicle seat 2 with a seating portion 20 and a backrest 21 is shown. The backrest 21 is exemplarily supported on the seating portion 20 in a manner that allows it to swing about a swing axis via a tilt adjustment mechanism with accessory components. Furthermore, the vehicle seat 2 exemplarily includes a longitudinal adjustment device 22, which allows the vehicle seat 2 to be adjusted longitudinally along the vehicle's longitudinal direction X. The vehicle's longitudinal direction X is oriented perpendicular to the vehicle's height direction Z. The longitudinal adjustment device 22 comprises two pairs of components, each consisting of a floor rail that can be fixed (in the illustrated example, fixed to the vehicle floor FB) and a seat rail supported in a manner that allows it to move along the vehicle's longitudinal direction X on the floor rail. The remainder of the vehicle seat 2 is fitted onto the seat rail. The vehicle's width direction Y is oriented perpendicular to the vehicle's longitudinal direction X and perpendicular to the vehicle's height direction Z.

[0040] A headrest 23 is also fitted on the backrest 21. The headrest 23 is located at the upper end of the backrest 21 away from the seating part 20.

[0041] The headrest 23 is adjustable relative to the backrest 21. Here, the headrest 23 can be positioned closer to the upper end of the backrest or further away from the upper end. Depending on the adjusted (or fixed in the absence of a tilt adjustment device) tilt of the backrest 21 relative to the vehicle floor FB, the headrest 23 on the backrest can be adjusted along the vehicle height direction Z.

[0042] Figures 2 to 5 Different views are shown of the upper end of the backrest 21 of the vehicle seat 2, on which is mounted a... Figure 1 23. Headrest.

[0043] As can be seen, the backrest 21 has two lateral longitudinal struts 210A and 210B, which extend from the lower end of the backrest 21 adjacent to the seating portion 20 to the upper end of the backrest 21. The longitudinal struts 210A and 210B are spaced apart from each other. Specifically, the longitudinal struts 210A and 210B are spaced apart from each other along the vehicle width direction Y.

[0044] The upper crossbeam 1 of the backrest 21 connects the longitudinal struts 210A and 210B to each other. For this purpose, the transverse plate 10 of the crossbeam 1 is securely connected to the longitudinal struts 210A and 210B. Currently, the transverse plate 10 has multiple support surfaces 103 and 104, which are surface-mounted against the corresponding support surfaces on the longitudinal struts 210A and 210B. The support surfaces 103 and 104 of the transverse plate 10 are welded to the support surfaces on the longitudinal struts 210A and 210B.

[0045] The transverse sheet 10 is made from a single sheet of material (such as a steel plate). The transverse sheet 10 is a bent sheet material. The transverse sheet 10 is made by punching out sheet material segments and bending the sheet material segments to form the transverse sheet 10.

[0046] Therefore, the transverse plate 10 has a front surface OV and a rear surface OR opposite to the front surface (see, for example, [reference needed]). Figure 5 or Figure 6 ). Figure 1 and Figure 2 The front surface of the transverse plate 10 is shown under an OV-shaped pattern. However, due to the bending of the segments of the transverse plate 10, it is also possible that, according to... Figure 1 or Figure 2 A portion of the rear surface OR can be seen in the view. The sheet segment bent into a transverse sheet 10 has two principal faces that are opposite to each other, which are connected to each other via cut edges. The front surface OV is one of the two principal faces, and the rear surface OR is the other principal face.

[0047] The front surface OV and the rear surface OR are spaced apart from each other by the material thickness of the transverse plate 10 at every location. The front surface OV extends parallel to the rear surface OR. At least on most surfaces (e.g., more than half of the front surface OV or the rear surface OR), the transverse plate 10 has the same distance between the front surface OV and the rear surface OR. The front surface OV is formed by the (larger) side of the plate segment forming the transverse plate 10, and the rear surface OR is formed by the other (larger) side of the plate segment forming the transverse plate 10.

[0048] Currently, all the support surfaces 103 and 104 of the transverse plate 10, which are welded to the longitudinal struts 210A and 210B, are constructed on the rear surface OR. Therefore, the transverse plate 10 rests against the longitudinal struts 210A and 210B using a section of its rear surface OR.

[0049] The crossbeam 1 also includes two headrest supports 11, each of which is supported at a first support surface 101 on the front surface OV of the transverse plate 10 and at a second support surface 102 on the rear surface OR of the transverse plate 10. In the specified installation state, the first support surface 101 is arranged above the second support surface 102.

[0050] In addition, the transverse plate 10 also has an opening 100 for each of the headrest supports 11. Specifically, the transverse plate 10 has exactly one opening 100 for each of the headrest supports 11.

[0051] The headrest supports 11 extend through corresponding openings 100 within the transverse plate 10. Here, each first support surface 101 is arranged above the opening 100, while each second support surface 102 is arranged below the opening 100.

[0052] Therefore, one of the support surfaces 101 and 102 of the transverse plate 10 is located in front of its respective headrest bracket 11, while the other support surface 101 and 102 of the transverse plate 10 is located behind its respective headrest bracket 11.

[0053] The support surfaces 101 and 102 of the transverse plates 10 for their respective headrest supports 11 are arranged on opposite sides of the opening 100. One support surface 101 or 102 is thus arranged on one side of the opening 100, while the other support surface 101 or 102 is arranged on the other side passing through the opening 100. Furthermore, the support surfaces 101 and 102 are staggered from the opening 100. Additionally, the support surfaces 101 and 102 of the transverse plates 10 for their respective headrest supports 11 are respectively flat and oriented parallel to each other. The support surfaces 101 and 102 of the transverse plates 10 for their respective headrest supports 11 are also arranged perpendicularly to each other and staggered from their respective planes.

[0054] Therefore, the transverse plate 10 is constructed with a receiving portion A for each headrest bracket 11, the receiving portion being formed by an opening 100 in which the respective headrest bracket 11 is arranged and support surfaces 101, 102 arranged on the opposite side of the opening and offset from the opening 100 and parallel to each other.

[0055] The headrest supports 11 are respectively positioned along the longitudinal axis L (see, for example, see...) Figure 5 It is constructed in the form of a straight-extending sleeve. The headrest supports 11 are respectively configured to accommodate the headrest rods of the headrest 23. Each headrest rod can be pushed into the corresponding headrest support 11 along the longitudinal axis L.

[0056] Furthermore, each headrest support 11 has two opposite, parallel sides that rest against the corresponding support surfaces 101 and 102. Currently, each headrest support 11 has a rectangular cross-section. However, this rectangular cross-section is merely an example, and other shapes, such as circles, are also possible.

[0057] The headrest bracket 11 is welded to the transverse plate 10 at support surfaces 101 and 102, respectively. For this purpose, a slot is constructed on each support surface 101 and 102, and a corresponding weld S is distributed along the slot. The welds S (and the slots) are constructed diagonally on their respective support surfaces 101 and 102.

[0058] The transverse plate 10 also has reinforcing portions 105 and 106. The reinforcing portions 105 and 106 extend from one of the support surfaces 102 and 103 for one of the headrest supports 11 to one of the support surfaces 103 and 104 for one of the longitudinal struts 210A and 210B, respectively. For example, from... Figure 2 and Figure 3 It can be seen from this that the reinforcement of Department 105... Figure 2 and Figure 3 The first support surface 101 of the left-side headrest bracket 11 extends from the nearest support surface 103, which is welded to the adjacent longitudinal strut 210A. Similarly, the reinforcement 106 extends from... Figure 2 and Figure 3 The second support surface 102 of the left headrest bracket 11 extends to the nearest support surface 104 that is welded to the adjacent longitudinal strut 210A.

[0059] For the other ( Figure 2 and Figure 3 Regarding the headrest support 11 (on the right side), it has reinforcing parts 105 and 106 distributed in a mirror image.

[0060] The reinforcing parts 105 and 106 are arched in their orientation. For example, the reinforcing parts 106 of each second support surface 102 extend in an S-shape.

[0061] It can also be seen that the reinforcing parts 105 and 106 are respectively constructed in the form of embossed ribs (however, the reinforcing parts 105 and 106 may also be constructed in the form of assembled accessories). Therefore, the reinforcing parts can be easily embossed when the transverse plate 10 is bent. The reinforcing parts 105 and 106 are used as tie rods. The reinforcing parts 105 and 106 extend in the bending area of ​​the transverse plate 10, and by embossing the reinforcing parts 105 and 106 into the bending area, the distance between the support surfaces 101 and 102 of the headrest bracket 11 and the support surfaces 103 and 104 of the longitudinal struts 210A and 210B is shortened. Therefore, the reinforcing parts 105 and 106 shorten the connection between the force introduction point and the force dissipation point.

[0062] The support surfaces 101 and 102 of the headrest bracket 11 are recessed relative to the area surrounding the transverse plate 10 (see especially). Figure 2 , Figure 3 and Figure 6 This provides additional reinforcement to the support surfaces 101 and 102 and ensures proper contact with them.

[0063] Reference Figure 4 and Figure 5 It can be seen that the headrest supports 11 (and their respective longitudinal axes L) are at a certain angle to the longitudinal struts 210A and 210B. This allows for the optimization of the positioning of the headrest 23 relative to the head. However, this is made possible by the design of the transverse plate 10, especially when the structure of the beam 1 is particularly flat, which is particularly true when combined with... Figure 5 As can be seen. Furthermore, it is unnecessary to introduce bends or kinks into the longitudinal struts as is commonly done. Instead, the front edges 211 (facing the seat user) of the longitudinal struts 210A and 210B are straight, especially at the height of the headrest support 11. This is particularly relevant in conjunction with... Figure 8 As can be seen, in practice, such front edges typically have bends or curves, which tend to bend during a collision, thus failing to provide optimal protection for the seat occupant. Since the design described here uses a straight front edge 211, this situation can be effectively avoided.

[0064] The headrest support 11 is arranged between two edges 211 and at an angle to the two edges. The headrest support extends through the plane unfolded by the two edges 211.

[0065] For example, the front edges 211 of the longitudinal struts 210A and 210B extend straight for at least half the length of the longitudinal struts 210A and 210B. Instead of a straight orientation, the edges 211 may be slightly arched, but without any local bends. The region of the edges 211 below the headrest support 11 extends parallel to or at an angle to the region of the edges 211 at the height of the headrest support 11, an angle at least an order of magnitude smaller than the angle between the headrest support 11 at the height of the headrest support 11 and the two edges 211.

[0066] The transverse plate 10 has steps, that is, it extends in stages and extends on both sides of the headrest support 11 through the steps.

[0067] Reference Figure 6 The shape of the transverse plate 10 in the area of ​​the support surfaces 101, 102 for the headrest support 11 should now be explained in detail. Starting from the upper edge, the transverse plate 10 first forms a bend, which is currently generally semi-circular. This bend serves to reinforce and protect the end edges, but may also be omitted. Immediately following this is another bend, after which the transverse plate 10 transitions into the first support surface 101. There, the transverse plate 10 extends straight in the cross-section shown. Then, the transverse plate 10 bends out from this surface, away from the corresponding headrest support 11, and then bends in the opposite direction. This is followed by an opening 100, after which the transverse plate 10 bends further toward the headrest support 11, and then bends in the opposite direction, this bend transitioning into the straight direction of the second support surface 102. Then, the transverse plate 10 bends again away from the headrest support 11, and has a further bend in the opposite direction, so that the lower end edges point rearward and form a reinforcement.

[0068] Figure 6 The diagram further illustrates that, due to the force acting on the headrest 23 through the head, the headrest support 11 is pressed against the support surfaces 101 and 102 of the transverse plate 10 along opposite support directions R1 and R2. These two support directions intersect perpendicularly on the support surfaces 101 and 102, thus improving the drag torque.

[0069] Combination Figure 7 It can be seen that the opening 100 in the transverse plate 10 for the headrest support 11 is basically rectangular. It can also be seen that two of the support surfaces 103 for the longitudinal struts 210A and 210B are constructed on the laterally protruding tabs. Figure 7 The first and second support surfaces 101 and 102, which are arranged in parallel and staggered order, can also be clearly seen.

[0070] List of reference numerals

[0071] 1. Crossbeam

[0072] 10. Horizontal panels

[0073] 100 opening

[0074] 101, 102 Support surfaces

[0075] 103, 104 Support surfaces

[0076] 105, 106 Reinforced Department

[0077] 11. Headrest support

[0078] 2. Vehicle seats

[0079] 20. Passenger section

[0080] 21 Backrest

[0081] 210A, 210B longitudinal struts

[0082] 211 Edge

[0083] 22. Longitudinal adjustment device

[0084] 23. Headrest

[0085] A containment section

[0086] FB vehicle floor

[0087] L (vertical direction)

[0088] OR Rear surface

[0089] OV front surface

[0090] R1, R2 support direction

[0091] S weld

[0092] X Vehicle longitudinal direction

[0093] Y (Vehicle width direction)

[0094] Z Vehicle height direction

Claims

1. A crosspiece (1) for a backrest (21), characterized in that, The crossbeam comprises: - a transverse panel (10) having a front side surface (OV) and a rear side surface (OR) facing away from the front side surface, and - at least one headrest support (11) which is supported at a first support surface (101) on the front side surface (OV) of the transverse panel (10) and at a second support surface (102) on the rear side surface (OR) of the transverse panel (10).

2. Beam (1) according to claim 1, characterized in that The headrest support (11) extends through an opening (100) in the transverse panel (10), wherein the first support surface (101) is arranged above the opening (100) and the second support surface (102) is arranged below the opening (100).

3. Beam (1) according to claim 1, characterized in that The headrest support (11) is welded to the transverse panel (10) at the first support surface (101) and the second support surface (102).

4. Beam (1) according to claim 1, characterized in that The headrest support (11) is formed in the form of a sleeve which extends straight along a longitudinal axis (L).

5. Beam (1) according to claim 1, characterized in that The headrest support (11) has a rectangular or circular cross section.

6. Beam (1) according to claim 1, characterized in that The first support surface (101) and the second support surface (102) are flat and / or commensurate with the headrest support (11).

7. Beam (1) according to claim 1, characterized in that The crossbeam (1) has two headrest supports (11) which are respectively supported at respective first support surfaces (101) on the front side surface (OV) of the transverse panel (10) and at respective second support surfaces (102) on the rear side surface (OR) of the transverse panel (10).

8. Beam (1) according to claim 7, characterized in that The transverse panel (10) has an opening (100) for each headrest support (11), wherein the headrest support (11) extends through the respective opening (100) and is supported on opposite sides of the opening (100) at support surfaces of the transverse panel (10) which are arranged offset to the openings (100) and parallel to one another.

9. Beam (1) according to claim 7, characterized in that The transverse panel (10) has support surfaces for supporting the transverse panel (10) on longitudinal struts (210A, 210B) of the backrest (21), wherein the transverse panel (10) further has reinforcing portions (105, 106) which respectively extend from a support surface for one of the headrest supports (11) to a support surface for one of the longitudinal struts (210A, 210B).

10. Beam (1) according to claim 9, characterized in that The reinforcing portions (105, 106) are respectively formed in the form of embossed beads and / or consist of at least one fitted-on attachment.

11. Beam (1) according to claim 9, characterized in that The reinforcing portions (105, 106) respectively extend arched.

12. Beam (1) according to claim 1, characterized in that The transverse panel (10) is formed integrally.

13. Beam (1) according to claim 1, characterized in that The transverse panel (10) is formed in the form of a panel bending.

14. Beam (1) according to claim 1, characterized in that The crossbeam has at least one accommodation (A) for a headrest support (11), wherein the accommodation (A) has an opening (100) in which the headrest support (11) can be arranged and support surfaces which are arranged offset to the opening (100) and parallel to one another on opposite sides of the opening (100) for supporting the headrest support (11).

15. Backrest (21) for a vehicle seat (2), characterized in that A vehicle seat has a crossbeam (1) according to claim 1.

16. Backrest (21) according to claim 15, characterized in that The longitudinal struts (210A, 210B) each have an edge (211), wherein at least one headrest support (11) of the crossbar (1) is arranged between the two edges (211) and at an angle thereto.

17. Backrest (21) according to claim 16, characterized in that The two edges (211) of the longitudinal struts (210A, 210B) are straight.

18. Backrest (21) according to claim 17, characterized in that The at least one headrest support (11) intersects a plane that is spanned by the two edges (211) of the longitudinal struts (210A, 210B).

19. Backrest (21) according to claim 18, characterized in that The two edges (211) of the longitudinal struts (210A, 210B) are both front edges (211) and face a seat user who is intended to rest against the backrest.

20. Backrest (21) according to claim 17, characterized in that The longitudinal struts are welded to the crossbar (10) at the support face of the crossbar (10).

21. Backrest (21) according to claim 16, characterized in that The backrest (21) according to any one of claims 15 to 21.

22. Vehicle seat (2), characterized in that ​

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