Vehicle seat with a backrest having a restraining element

Abstract

The proposed solution relates to a vehicle seat (1A-1G), comprising: a seat part (10) and a backrest (11A-11G) which can be moved relative to the seat part (10) between at least one upright sitting position, in which a seat user (B1) can sit on the vehicle seat (1A-1G), and a set-down position, wherein on the backrest (11A-11G) a set-down surface (110A-110E) is provided, on which the feet (F) of a seat user (B2) located behind the vehicle seat (1A-1G) in relation to a direction of travel (R) can be set down when the backrest (11A-11G) is arranged in the set-down position, and a restraining element (18A-18F) is provided, which is designed to brace the feet (F), set down on the set-down surface (110A-110E), against a movement in the direction of travel (R).

Description

[0001] Brose Fahrzeugteile SE & Co.

[0002] Limited partnership, Coburg

[0003] Max-Brose-Str. 1

[0004] 96450 Coburg and

[0005] Joyson Safety Systems Germany GmbH

[0006] Railway Route 1

[0007] 63743 Aschaffenburg

[0008] BRO3217WO / 2024 382 WO

[0009] Vehicle seat with a backrest incorporating a restraint element

[0010] Description

[0011] The proposed solution concerns a vehicle seat and an arrangement with such a vehicle seat.

[0012] In a vehicle crash, significant forces can act on a vehicle seat and the passenger sitting in it. Vehicle seats are therefore equipped with seat belts to restrain the occupant in the event of a crash. The seat belt is typically of particular importance in a frontal collision, as it keeps the occupant in the vehicle seat. However, a potential hazard is submarining, which occurs when the occupant's pelvis slides under the lap belt of a three-point seat belt. The arrangement of the seat belt attachment points and the shape of the seat cushion are therefore typically designed to minimize the risk of submarining. Page 2

[0013] In modern vehicles, comfort plays an increasingly important role alongside safety. Adjustable car seats are a common requirement, allowing each occupant to find their ideal, comfortable position. A significant increase in comfort, especially on long journeys, can be achieved by reclining the seat into a relaxed position, enabling the occupant to rest or sleep. This can be accomplished by allowing the seat backrest to be tilted back to a relatively large angle.

[0014] However, objectives such as the highest possible safety, the highest possible comfort and the simplest possible construction are sometimes in conflict with each other.

[0015] The task is to enable a vehicle seat user to have a comfortable and safe seating position.

[0016] This problem is solved by an object having the features of claim 1.

[0017] The following describes a vehicle seat comprising a seat cushion and a backrest. The backrest is movable relative to the seat cushion, between (at least) an upright sitting position and a reclining position. In the upright sitting position, the vehicle seat can be occupied by a occupant sitting on the seat cushion with their back against the backrest. A footrest and a restraint element are provided on the backrest. The feet of a occupant located behind the vehicle seat (e.g., in a rear row of seats) can be placed on the footrest when the backrest is in the reclining position. The restraint element is designed to support the feet placed on the footrest against movement in the aforementioned direction (e.g., the direction of travel).

[0018] For example, a passenger sitting in another vehicle seat behind the one described can rest their feet on the backrest of the seat when it is folded down, provided the seat itself is unoccupied. This allows for a particularly comfortable footrest height, ideal for relaxing or sleeping, and significantly improves comfort, especially on long journeys. However, the elevated legs, particularly when combined with a reclined backrest on the other vehicle seat (e.g., the rear seat), could increase the risk of submarining, as the impact force on the legs in the event of a frontal collision could be transferred to the rear seat.

[0019] 2024 382 WO Page 3

[0020] The pelvis of the seat user can be pulled. However, by providing the restraint element as described, it can support the feet and thus the legs of the seat user in the direction of the leg's momentum vector. This makes it possible to offer the seat user increased comfort and a high level of safety with simple means.

[0021] For example, when the backrest is in the folded position, the restraint element is movable relative to the vehicle floor along the direction of travel, i.e., the direction of travel. This also applies to the mounting points of the vehicle seat for attaching it to the vehicle floor. Thus, the position of the restraint element relative to the rear vehicle seat (and therefore relative to the feet of the occupant) can be adjusted, particularly the distance between the feet and the occupant. This makes it possible to move the restraint element into a position, especially close to the feet, where the feet are best supported in the event of a crash. This adjustment can be made depending on the leg length and seating position of the occupant.

[0022] The backrest has a front surface against which the occupant of the vehicle seat can lean (when the backrest is in the upright position). Furthermore, the backrest has a rear surface opposite the front, specifically facing away from it. The restraint element may be located at the rear, for example, mounted on the back of the vehicle seat. Alternatively, the restraint element may be movable relative to the backrest, allowing it to be positioned at the rear of the backrest. This provides particularly good support.

[0023] For example, in the reclining position, at least part of the front of the backrest rests on the seat cushion. This allows for a relatively flat or even horizontally oriented storage surface and thus comfortable support.

[0024] The restraint element has a support surface to brace the feet placed on the platform against movement in the direction of travel. The support surface can be oriented at an angle to the platform and / or to the direction of travel (e.g., at a right angle or at an angle between 70 and 110 degrees or between 80 and 100 degrees).

[0025] The support surface is movable relative to at least part of the backrest. This allows...

[0026] 2024 382 WO Page 4 the support surface can be unfolded or extended as needed and / or adjusted in a simple manner.

[0027] In one embodiment, the support surface is movable relative to at least part (or the entire) of the backrest by means of a drive unit. This allows for particularly convenient adjustment, which can, for example, be automated. For instance, when a command is entered into a control system that moves the rear vehicle seat into a relaxed position (by adjusting the backrest of that rear vehicle seat backward), the backrest of the vehicle seat is automatically moved into the stowed position, e.g., folded down, and / or the restraint element is moved into a restraint position. The drive unit includes, for example, a motor.

[0028] In one embodiment, the drive unit includes a pyrotechnic actuator. The pyrotechnic actuator comprises, for example, a detonator and a propellant charge that can be ignited by the detonator. This enables a particularly rapid movement of the restraint element into the restraint position, triggered, for example, by a crash sensor or pre-crash sensors.

[0029] For example, the restraint element is mounted on the backrest in a sliding manner. This allows it to be easily moved into the restraint position and, optionally, into other positions as well.

[0030] Alternatively or additionally, the restraint element can be pivotally mounted on the backrest. This allows it to be easily folded out when needed.

[0031] The restraint element can be designed to function as a footrest, table, and / or screen for displaying digital content when the backrest is in at least one upright sitting position. In this way, the restraint element can serve multiple purposes.

[0032] In one embodiment, the backrest comprises a lower backrest section, which is, for example, pivotally mounted to the seat section, and a backrest head that is movably, for example, pivotally, mounted on the lower backrest section. The backrest head can be designed to serve as the retaining element. For this purpose, the backrest head is designed, for example, to pivot backward along a straight line extending from a pivot axis of the lower backrest section to a pivot axis of the backrest head on the lower backrest section. In this way, the backrest head can fulfill a dual function.

[0033] 2024 382 WO Page 5

[0034] For example, the backrest head can be swivelled to an angle relative to the lower backrest section that opens away from the seat section. So, if the lower backrest section is folded onto the seat section, the backrest head will point upwards, for example.

[0035] A headrest can be movably mounted on the backrest, for example, sliding and / or swiveling. It can be designed so that the headrest also serves as the restraint element. For this purpose, the headrest can be designed to swivel backwards along a straight line extending from a pivot axis of the backrest on the seat to an attachment point of the headrest on the backrest. In this way, the headrest can fulfill a dual function.

[0036] The restraint element can be movable relative to the backrest. It can be designed so that, in the upright sitting position (or positions), the restraint element is movable (e.g., pivotable) within a first adjustment range (e.g., angle range) relative to the backrest (or a part of the backrest). Furthermore, it can be designed so that, in the reclined position of the backrest, the restraint element is movable (e.g., pivotable) within a second adjustment range (e.g., angle range) relative to the backrest (or a part of the backrest). The second adjustment range is, for example, larger than the first. For instance, in the upright sitting position (or positions), the restraint element is movable relative to the backrest (or a part of the backrest) up to a first end position in one direction (e.g., backwards), e.g., pivotable.In the stowed position, the restraint element can be moved beyond the first end position to a second end position, for example, by pivoting. The first end position is predefined, for example, by a control system and / or a mechanical stop. In the stowed position, the area between the first and second end positions is released by the control system and / or by mechanically releasing the stop. This prevents, for example, the seat back and / or headrest from being moved too far back in an upright seating position. Alternatively or additionally, a warning may be provided in the vehicle (e.g., similar to a seatbelt warning) if the restraint element is set to a safety-critical position.

[0037] For example, the headrest can be swivelled backwards relative to the backrest until it rests against the back of the backrest. This allows for easy assembly.

[0038] It may be designed that the restraint element is formed wholly or partially in a recess of the backrest, e.g. in the form of a side wall. This allows for a

[0039] 2024 382 WO Page 6 particularly robust design.

[0040] A component, such as a back panel section, can be mounted so that it can move relative to the backrest, thus freeing up the support surface. This allows the restraint element to be visible only when needed.

[0041] The component is, for example, mounted on the backrest in a sliding manner. This allows for simple design.

[0042] A control system may be provided. This control system may be configured to adjust the distance between the restraint element and another vehicle seat. The control system may be communicatively linked to one or more drive units of the vehicle seat and / or the other vehicle seat.

[0043] According to one aspect, an arrangement, in particular for a vehicle, is specified, comprising: a (first) vehicle seat according to any of the embodiments described herein and a further (i.e., second) vehicle seat arranged (viewed in the direction of travel) behind the (first) vehicle seat.

[0044] According to one aspect, a vehicle is specified, encompassing the vehicle seat and / or the arrangement according to any of the configurations described herein.

[0045] The underlying concept of the invention will be explained in more detail below with reference to the exemplary embodiments shown in the figures. The figures show:

[0046] Fig. 1A-1C shows a vehicle with a vehicle seat comprising a seat section, a backrest and a restraint element which can also be used as a table and footrest, and a further vehicle seat arranged behind it;

[0047] Fig. 2A, 2B shows an arrangement with a vehicle seat comprising a seat part, a backrest and a restraint element in a recess, as well as a further vehicle seat arranged behind it;

[0048] 2024 382 WO Page 7

[0049] Fig. 3 shows a vehicle seat comprising a seat section, a backrest and a

[0050] Retaining element formed by a backrest head;

[0051] Fig. 4A, 4B shows an arrangement with the vehicle seat according to Fig. 3 and another vehicle seat arranged behind it;

[0052] Fig. 5A, 5B shows an arrangement with a vehicle seat comprising a seat part, a backrest and a restraint element formed by a headrest of the vehicle seat, and a further vehicle seat arranged behind it;

[0053] Fig. 6A, 6B shows an arrangement with a vehicle seat comprising a seat part, a backrest and a restraint element in a recess which can be closed by a movable component, and a further vehicle seat arranged behind it;

[0054] Fig. 7 shows an arrangement with a vehicle seat, comprising a seat part, a

[0055] Backrest and a restraint element in the form of a flexible pocket, as well as another vehicle seat arranged behind it; and

[0056] Fig. 8 shows an arrangement with a vehicle seat, comprising a seat part, a

[0057] Backrest and a pyrotechnically deployable restraint element, as well as another vehicle seat arranged behind it.

[0058] Fig. 1A shows a vehicle 3 with an arrangement A of vehicle seats 1A, 2. The arrangement A comprises a first vehicle seat 1A and a second vehicle seat 2 arranged behind the first vehicle seat 1A. Since the following description mainly refers to the first vehicle seat 1A, it will be referred to as vehicle seat 1A in the following for ease of reference, while the second, rear vehicle seat 2 will be referred to as another vehicle seat 2.

[0059] The vehicle seat 1A comprises a seat section 10 and a backrest 11A. The backrest 11A is arranged at the rear of the seat section 10 and is pivotally mounted to the seat section 10 about a pivot axis by means of an arrangement of fittings 13. A headrest 12 is mounted at the upper end of the backrest 11A, the end furthest from the seat section 10.

[0060] 2024 382 WO Page 8

[0061] The vehicle seat 1A further comprises a height adjustment device 14 for adjusting the seat height of the seat section 10 (including the backrest 11A) relative to a vehicle floor 30 of the vehicle 3, on which the vehicle seat 1A is mounted. The height adjustment device 14 has (on each side, i.e., left and right) a front support arm 140 and a rear support arm 141, by means of which the seat section 10, and also the backrest 11A, are supported on the vehicle floor 30. The support arms 140 and 141 are each pivotally mounted on a base, and the seat section 10 is pivotally mounted on the support arms 140 and 141.

[0062] By adjusting the swing arms 140, 141 relative to the base, the seat height is adjustable relative to the base (and to the vehicle floor 30) along a vehicle vertical axis Z.

[0063] In this case, the base consists of seat rails 150 of a longitudinal adjustment device 15 of the vehicle seat 1A. If the vehicle seat 1A is not equipped with the longitudinal adjustment device 15, then the vehicle floor 30 or a component fixed to it can serve as the base.

[0064] By means of the longitudinal adjustment device 15, the seat section 10 (together with the backrest 11A) is adjustable relative to the vehicle floor 30 along a longitudinal vehicle axis X. The longitudinal vehicle axis X runs perpendicular to the vehicle's vertical axis Z. The longitudinal vehicle axis X and the vehicle's vertical axis Z each run perpendicular to a transverse vehicle axis Y. The pivot axes of the swing arms 140, 141 run parallel to the vehicle's transverse axis Y. The pivot axis of the backrest 11A relative to the seat section 10 runs parallel to the vehicle's transverse axis Y.

[0065] In the present example, the longitudinal adjustment device 15 comprises two floor rails 151 spaced apart along the vehicle's transverse axis Y. In the side view according to Fig. 1A, the left floor rail 151 is visible from the perspective of a seat user B1 sitting on the vehicle seat 1A. The corresponding right floor rail 151 is designed analogously (e.g., identically or as a mirror image) to the left floor rail 151. This also applies to the previously mentioned swing arms 140, 141 of the height adjustment device 14.

[0066] The floor rails 151 can be mounted on the vehicle floor 30 of the vehicle 3 and, in the mounted state, are attached to the vehicle floor 30 of the vehicle 3 as shown in Fig. 1A. Each of the floor rails 151 corresponds to one of the seat rails 150 of the longitudinal adjustment device.

[0067] 2024 382 WO Page 9

[0068] 15 longitudinally displaceable in engagement. The longitudinal adjustment device 15 connects the height adjustment device 14 to the vehicle floor 30.

[0069] Vehicle seat 1A is shown here as merely an example of a front passenger seat. The other vehicle seat, 2, is a rear seat located in a second row, behind the (first) vehicle seat 1A. However, it should be noted that other arrangements are conceivable. In an autonomous vehicle, vehicle seat 1A could also be located in the driver's position. Furthermore, the two vehicle seats 1A and 2 could, for example, be arranged in a second or third row.

[0070] Along a direction of travel R, which runs parallel to the vehicle's longitudinal axis X, the additional vehicle seat 2 is arranged behind vehicle seat 1A. The direction of travel R corresponds to the direction in which the vehicle 3 moves when traveling straight ahead.

[0071] The additional vehicle seat 2 also has a seat section 20 and a backrest 21. The backrest 21 is located at the rear of the seat section 20 and is pivotally mounted on the seat section 20 about a pivot axis by means of an arrangement of fittings 23. A headrest 22 is mounted at the upper end of the backrest 21, the end furthest from the seat section 20. The additional vehicle seat 2 can be fixedly attached to the vehicle floor 30 or to a vehicle part fixedly connected thereto, or alternatively, it can also be height- and / or longitudinally adjustable. In this example, the additional vehicle seat 2 is only adjustable in height.

[0072] Fig. 1A shows the vehicle seat 1A and the other vehicle seat 2, each in an upright seating position. A first occupant, B1, sits on the vehicle seat 1A with his back against a front surface 113 of the backrest 11A. A second occupant, B2, sits on the other vehicle seat 2 with his back against its backrest 21. The backrest 11A of the vehicle seat 1A can be adjusted to one of several possible upright seating positions by means of the fittings 13.

[0073] Fig. 1 B shows the vehicle seat 1 A with the backrest 11 A in a storage position and the other vehicle seat in a relaxed position.

[0074] In the stowed position, a predominant part of the front 113 of the backrest 11A of the vehicle seat 1A rests on the seat section 10. A storage surface 110A is formed on the backrest 11A of the vehicle seat 1A, specifically on a rear side 114 opposite the front 113, on which the feet F of the person in the direction of travel R rest.

[0075] 2024 382 WO Page 10 The feet of the (second) seat user B2 located behind the vehicle seat 1A can be stored when the backrest 11A is in the storage position. Fig. 1B shows the feet F of the (second) seat user B2 resting on the storage surface 110A. In the example shown, the storage surface is flat.

[0076] The additional vehicle seat 2 is adjustable to the reclining position, in which the second passenger B2 can, for example, rest or sleep in the additional vehicle seat 2. In the reclining position, the backrest 21 is inclined further backward (from the perspective of the second passenger B2, who is seated in the additional vehicle seat 2 and facing straight ahead) compared to the upright seating position, specifically to such an extent that a torso angle and / or an angle of a longitudinal axis of the backrest 21 is greater than 25° (in particular greater than 30°, greater than 40° or even greater than 50°) with respect to the vehicle's vertical axis Z (and, in the case of the vehicle 3 placed on a horizontal surface, with respect to the vertical). The torso angle corresponds, for example, to the angle of a straight torso line of the torso from the hip joint to the shoulders of the second passenger B2, who is seated in the additional vehicle seat 2, with respect to the vehicle's vertical axis Z (and / or with respect to the vertical).The longitudinal axis of the backrest 21 extends, for example, from the pivot axis of the backrest 21 at the seat part 20 to the upper end edge of the backrest 21.

[0077] The torso angle is measured, for example, using the standardized H-point measuring machine SAE J826 H-POINT MANIKIN according to E / ECE / 324 and / or E / ECE / TRANS / 505 (e.g., according to Regulation No. 14, REV. 1 / ADD. 13 / REF, 1 , ANNEX 4).

[0078] The relaxed position of the second vehicle seat 2 is made particularly comfortable by the option of resting the feet F on the storage surface 110A, as the height and distance of the folded-down backrest 11A of vehicle seat 1A allow the (second) seat user B2 to fully extend their legs. Such a sitting or reclining position can also reduce the risk of thrombosis on long journeys.

[0079] In the event of a frontal crash, the weight of the legs of the (second) seat occupant B2 pulls the hips of the (second) seat occupant B2 forward. The weight of one leg of an average person is approximately 13 kg. Since, in the relaxed position, the seat occupant's torso is tilted relatively far backward, e.g., at an angle of more than 35 degrees to the vehicle's vertical axis Z or even at an angle of more than 45 degrees to the vehicle's vertical axis Z, these forces could contribute to submarining.

[0080] 2024 382 WO Page 11

[0081] To prevent this, a restraint element 18A is formed on the backrest 11A of vehicle seat 1A to support the feet F and legs of the (second) seat occupant B2, which are resting on the storage area 110A, against movement along the direction of travel R. If seat occupant B2 of the second vehicle seat 2 slides forward as a result of a frontal impact, their feet F press against the restraint element 18A and are thereby prevented from moving forward further. The restraint element 18A is designed to withstand the forces exerted by the legs. This prevents the legs from pulling seat occupant B2 of the second vehicle seat 2 forward under the seat belt.

[0082] The restraint element 18A has a support surface 180 for supporting the feet F, which are placed on the storage surface 110A, against movement in the direction of travel R. In this example, this support surface 180 is flat. The restraint element 18A comprises a plate 182. The plate 182 has the support surface 180. In the position shown in Fig. 1B, the support surface 180 faces the seat user B2. The support surface 180 is therefore oriented at an angle to the storage surface 110A and to the direction of travel R. In this example, the support surface 180 is oriented approximately at a right angle to the storage surface 110A. While in the position shown in Fig. 1A the rear side 114, which faces away from the front 113 of the backrest 11A, faces the second, rear seat user B2 (and is oriented backwards), in the position shown in Fig. 1B this rear side 114 is oriented upwards.Between these two positions, the backrest 11A is swivelled by more than 45 degrees, in this case by more than 80 degrees, specifically even more than 90 degrees.

[0083] The restraint element 18A is located on the rear 114 of the backrest 11A of the vehicle seat 1A.

[0084] Fig. 1C shows the arrangement A with the vehicle seats 1A, 2 in the positions shown in Fig. 1A, except that the restraint element 18A is configured as a table in Fig. 1A, but as a footrest in Fig. 1C. It should be noted that the restraint element 18A can, for example, include a display on one of its large surfaces, either alternatively or additionally, allowing, for example, the playback of films. In Fig. 1A, the restraint element 18A is positioned higher on the backrest 11A than in Fig. 1C. For this purpose, the restraint element 18A is movable relative to the backrest 11A. In this case, the restraint element 18A is slidably mounted on the backrest 11A. For this purpose, one or more guides 181 are mounted on the backrest 11A, on which the plate 182 is slidably mounted. Furthermore, it is provided that the restraint element 18A is pivotally mounted on the backrest 11A. By means of a swivel joint, the plate 182 can thus be moved relative to the backrest.

[0085] 2024 382 WO page 12 can be swivelled. The plate 182, including its swivel joint, is slidable on the guides 181. In this way, the retaining element 18A can serve both to secure the raised feet F (Fig. 1B), as a table (Fig. 1A), and as a footrest (Fig. 1C). If none of these functions are required, the plate 182 can be folded against the backrest 11A, i.e., folded away.

[0086] While it would be possible to adjust the restraint element 18A manually, in this case, motorization is provided for increased comfort. For this purpose, the plate 182 (and thus the support surface 180) is movable relative to at least a part of the backrest 11A, in this case the entire backrest 11A, by means of a drive unit 187A. When used as a table, it is height-adjustable; this also applies when used as a footrest, which additionally allows for tilt adjustment. When used to restrain the feet F placed on the support surface 110A, the restraint element 18A can be moved to a position adjacent to the feet F, whereby a different position can be set depending on the size of the seat user B2 to achieve optimal protection.

[0087] The vehicle seat 1A comprises several drive units 16 for adjusting the vehicle seat 1A. In this example, each drive unit 16 comprises a motor, specifically an electric motor. The vehicle seat 1A can be moved from the upright sitting position to the reclined position and vice versa by means of the drive units 16. Furthermore, the height, longitudinal position, and backrest angle can be adjusted by means of a respective drive unit 16. For this purpose, the longitudinal adjustment mechanism 15 comprises a drive unit 16. The height adjustment mechanism 14 comprises a drive unit 16, and the fittings 13 are adjustable by means of a drive unit 16. Additional drive units may be provided. The other vehicle seat 2 also comprises drive units, in particular at least one drive unit for the motorized adjustment of the backrest 21 relative to the seat section 20.

[0088] Furthermore, a control system 17 is provided. In the example shown, the control system 17 of vehicle seat 1A is mounted on vehicle seat 1A, but it could also be arranged at a distance from it. In addition, the control system 17 can comprise several individual, spaced-apart control units that are communicatively connected to each other, e.g., a central control unit of the vehicle 3. The control system 17 is communicatively connected to the drive units 16 of vehicle seat 1A. In the present example, the control system 17 is also communicatively connected to one or more (e.g., all) drive units of the other vehicle seat 2.

[0089] 2024 382 WO Page 13

[0090] The restraint element 18A (with the backrest 11A in the stowed position) is movable along the direction of travel R relative to the vehicle floor 30. For this purpose, the drive unit 187A of the restraint element 18A can be activated to move the restraint element 18A (in particular the plate 182) along the guides 181. Furthermore, the drive unit 16 of the longitudinal adjustment device 15 can be activated to move the vehicle seat 1A (including the restraint element 18A) relative to the vehicle floor 30.

[0091] The control system 17 is configured to adjust the restraint element 18A into a restraint position by activating one or more of the drive units 16, 187A. This can be done manually, e.g., by pressing buttons, or automatically. For automated adjustment, the vehicle seat 1A can include one or more sensors 19. An example sensor 19 mounted on the vehicle headliner is shown here. The sensor 19 is mounted at a distance from the vehicle seat 1A but can be considered part of the vehicle seat 1A because it is communicatively coupled to its control system 17. The sensor 19 is an optical sensor, e.g., in the form of a camera, and serves to detect the position of the feet F of the (second) seat occupant B2.The control system 17 reads the sensor and adjusts the restraint element 18A by means of a corresponding control signal from one or more of the drive units 16, 187A so that it is positioned close to or touching the feet. The described configuration of the sensor 19 is merely exemplary, and the vehicle seat 1A can alternatively or additionally include one or more other sensors, e.g., another optical sensor, a radar sensor, a tactile sensor, a capacitive sensor, or the like. At least one sensor can be arranged on the storage surface 110A, and at least one sensor can be arranged on the plate 182. The control system 17 can be configured to use the at least one sensor to set and / or suggest a distance between the restraint element 18A and the rear vehicle seat 2.The drive unit 187A can be used here and / or the height adjustment, a tilt adjustment of the seat section, the backrest tilt adjustment and / or the longitudinal adjustment of the vehicle seats 1A, 2.

[0092] Figures 2A and 2B show two vehicle seats 1B, 2, which can be designed and mounted in the vehicle 3 as described in Figures 1A-1C, however, the backrest 11B and the restraint element 18B of the front vehicle seat 1B are designed differently.

[0093] According to Figs. 2A and 2B, the retaining element 18B is defined by a contouring of the back (in particular a back panel of the backrest 11B) 114 of the backrest 11B.

[0094] 2024 382 WO page 14. Specifically, the backrest 11 B has a recess 184. The retaining element 18B is formed in the recess 184 of the backrest 11 B.

[0095] The storage surface 110B is curved inwards into the backrest 11B. The storage surface 11OB is tray-shaped. The storage surface 11OB has a slope facing the other vehicle seat 2. The restraint element 18B has a side wall which forms the support surface 180. The storage surface 110B adjoins the support surface 180 and is at an angle to it. The support surface 180 can be oriented approximately perpendicular to the vehicle's longitudinal axis X (see Fig. 1A), but in this case, it is inclined at a right angle to it (e.g., by up to 10 or 15 degrees) to prevent the feet from slipping. In the storage position, the upper end of the support surface 180 along the vehicle's vertical axis Z is positioned further back along the vehicle's longitudinal axis X (closer in this direction to the position of the other vehicle seat 2) than the lower end of the support surface 180 along the vehicle's vertical axis Z.

[0096] The 18B retaining element does not require any moving parts of its own and is therefore particularly easy to construct.

[0097] Fig. 3 shows a vehicle seat 1C, which can be designed and mounted in the vehicle 3 as described with reference to Figs. 1A-1C. However, the backrest 11C and the restraint element 18C of the vehicle seat 1C are designed differently.

[0098] As shown in Fig. 3, the backrest 11C comprises a lower backrest section 111 and a backrest head 112 movably mounted on the lower backrest section 111. The lower backrest section 111 is mounted on the seat section 10 by means of fittings 13. At the end of the lower backrest section 111 facing away from the seat section 10, the backrest head 112 is pivotally mounted about a pivot axis S, shown here by means of fittings. The adjustable backrest head allows for a particularly comfortable adjustment of the vehicle seat 1C for the respective seat user B1 in the upright seating position. A drive unit 187A is provided for adjusting the backrest head 112 relative to the lower backrest section 111.

[0099] The backrest head 112 forms the restraint element 18C of the vehicle seat 1C, as will be explained in more detail below.

[0100] Furthermore, Fig. 3 shows a leg rest 100, which is mounted at a front end of the vehicle seat 1C, shown here as an example of folding in and out. The vehicle seat 1C can itself be moved into a relaxed position, as illustrated in Fig. 3. It should be noted that also

[0101] 2024 382 WO page 15, the additional vehicle seat 2 in all examples described herein can have such a leg rest 100. This can, for example, be designed so that, in the relaxed position of the additional vehicle seat 2, it closes a gap between the vehicle seat and the additional vehicle seat 2, or at least is arranged in the gap. In this way, a (nearly) closed lying surface can be provided.

[0102] Figures 4A and 4B show the vehicle seat 1C according to Figure 3 and another vehicle seat 2, which can be designed and mounted in the vehicle 3 as described with reference to Figures 1A-2B.

[0103] As can be seen particularly in Fig. 4B, the backrest head 112 is adjustable particularly far to the rear, in this case so far that, when the lower backrest section 111 is folded forward onto the seat section 10, the backrest head 112 stands upright (along the vehicle's vertical axis Z). For this purpose, the pivoting mechanism (comprising the fittings of the backrest head 112) is designed such that the backrest head 112 can pivot rearward (towards the other vehicle seat 2) beyond a plane defined by the two pivot axes of the lower backrest section 111 (at the bottom of the seat section 10 and at the top of the backrest head 112). The backrest head 112 can pivot at an angle relative to the lower backrest section 111 that opens away from the seat section 10. The (second) seat occupant B2 can rest their feet F within this angle.

[0104] The lower backrest part 111 forms the storage surface 110C, the backrest head 112 the support surface 180.

[0105] Consequently, the backrest head adjustment, due to its wide adjustability to the rear, can also serve to secure the feet F.

[0106] The control system 17 can be designed (alternatively or additionally, this applies to the swivel mechanism) such that a limited adjustment range is available in the upright sitting position (or in all possible upright sitting positions), while in the rearward-folding position, a further adjustment range is released, allowing adjustment to the position shown in Fig. 4B. Alternatively or additionally, a mechanical stop can be provided, which is removed electrically or mechanically when moving into the rearward-folding position.

[0107] Figures 5A and 5B show two vehicle seats 1 D, 2, which are designed and installed in the vehicle

[0108] 3 can be mounted as described in Fig. 1A-1C, however, the

[0109] 2024 382 WO Page 16

[0110] The backrest 11 D and the restraint element 18D of the front vehicle seat 1 D are designed differently.

[0111] As described above, the vehicle seat 1D also includes a headrest 12. This is movably mounted on the backrest 11D. In this case, however, the headrest 12 is designed to form the restraint element 18D.

[0112] For this purpose, the headrest 12 (by means of a drive unit 187A, here by way of example a motorized drive unit) can be moved so far backwards that it (with its back) comes to rest on or above the back 114 of the backrest 11 D, cf. Fig. 5B. For this purpose, the headrest 12 can be pivoted about a pivot axis S relative to the backrest 11 D, namely beyond a plane through the pivot axis of the backrest 11 D at the seat part 10 and beyond the pivot axis S of the headrest 12 to the rear, e.g. by 45, 90, or even 135 degrees beyond.

[0113] Since the headrest 12 is located at the upper edge of the backrest 11 D, i.e., relatively far away from the other vehicle seat 2 when folded forward, the vehicle seat 1 D can be moved close to the other vehicle seat 2 in the storage position by means of the longitudinal adjustment device 15, see Fig. 5B.

[0114] The control system 17 can, in turn, be designed (alternatively or additionally, the swivel mechanism) such that a limited adjustment range is available in the upright sitting position (or in all possible upright sitting positions), while in the stowed position, a further stroke is released to the rear, allowing adjustment to the position shown in Fig. 5B. Alternatively or additionally, a mechanical stop can be provided, which is removed electrically or mechanically when moving into the stowed position.

[0115] Figures 6A and 6B again show two vehicle seats 1 E, 2, which can be designed and mounted in the vehicle 3 as described in Figures 1A-1C, however, the backrest 11 E and the restraint element 18E of the front vehicle seat 1 E are designed differently.

[0116] Similar to what has already been described with reference to Figures 2A and 2B, the restraint element 18E in the vehicle seat 1E according to Figures 6A and 6B is also formed by a contour of the backrest 11E, in this case by the side wall of a recess 185 in the backrest 11E. In the upright seating position according to Figure 6A, however, this recess 185 is formed by a

[0117] 2024 382 WO Page 17

[0118] Component 183, here in the form of a cover part, is closed. Component 183 covers the recess 185. As a result, the support surface 180 of the retaining element 18E is not visible.

[0119] Component 183 is mounted to be movable relative to the backrest 11 E in order to release the support surface 180. In this case, component 183 is displaceable relative to the backrest 11 E. A drive unit (e.g., a motor) can be used to recess component 183 into the backrest 11 E, although other configurations are also conceivable. In the reclining position (see Fig. 6B), the seat user B2 can place a foot F into the recess 185. Component 183 then forms the storage surface 11 OE, specifically, by way of example, the surface which, in the upright sitting position, forms part of the surface of the rear 114 of the backrest 11 E.

[0120] While Figures 6A and 6B show the component 183 retracting (or lowering in the folded position) to release the support surface 180, it is also possible, conversely, for a component to extend from the backrest 11E to provide the support surface 180. Furthermore, the component 183 can be linearly adjustable and / or pivotable on the backrest 11E.

[0121] Another restraint element 18F is illustrated in Fig. 7. Fig. 7 again shows two vehicle seats 1F, 2, which can be designed and mounted in the vehicle 3 as described with reference to Figs. 1A-1C. Here, the restraint element 18F is formed by a pocket 186. The pocket 186 is formed, for example, by a textile, such as a cover fabric. The pocket 186 can be elastic. The seat user B2 can place their feet F into the pocket 186. The pocket 186, in particular a closed end thereof, restrains the feet F of the seat user B2. A design as a foot tunnel is also conceivable. The foot tunnel or the pocket 186 can be equipped with a heater, a massage device, or the like.

[0122] Another restraint element 18G is illustrated in Fig. 8. Fig. 8 again shows two vehicle seats 1G, 2, which can be designed and mounted in the vehicle 3 as described with reference to Figs. 1A-1C. Here, the restraint element 18G, similar to the example in Figs. 1A-1C, comprises a rigid part movable relative to the backrest 11G, again in the form of a plate. In this case, the restraint element 18G is movable relative to the backrest 11G by means of a drive unit 187B (here, by way of example: pivotable), wherein the drive unit 187B comprises a pyrotechnic actuator 188.

[0123] 2024 382 WO Page 18

[0124] The pyrotechnic actuator 188 is equipped with a detonator and a propellant charge that can be ignited by the detonator. The pyrotechnic actuator 188 has a housing in which the propellant charge and the detonator are located. The drive unit 187B has an extendable telescopic arm. Upon ignition of the propellant charge, the pyrotechnic actuator 188 extends the telescopic arm. This makes it possible to activate the restraint element 18G only in the event of a crash. The pyrotechnic actuator 188, as configured in this way, can also be referred to as a pyrotechnic piston. In general, a pyrotechnic piston can be used to displace and / or deform part of the backrest to provide a restraint element.

[0125] The pyrotechnic actuator 188 is activated by the connected control system 17, which detects an impending or already started crash, for example by means of an acceleration sensor and / or by means of connected post-crash or pre-crash sensors.

[0126] It should be noted that the other restraint elements 18A, 18C-18E described herein, which are equipped with a drive unit 187A, may alternatively or additionally include a drive unit 187B with a pyrotechnic actuator 188.

[0127] Furthermore, it should be noted that the drive units 187A, 187B of the restraint elements described herein may be equipped with pyrotechnic actuators 188 and may alternatively or additionally be designed as motors as described above. For the drive units 187A, 187B, the following (electromechanical) systems, for example, may be provided: fast adjustment actuators (which may be directly self-locking, e.g., with poor efficiency and mechanically simple, or non-self-locking, e.g., optimized for efficiency and / or with a backstop, and smaller due to high efficiency), a locked energy storage device (e.g., a spring), with a pyrotechnic actuator, with an electric actuator or mechanical mass pendulum mechanism, with a locking effect by means of a one-sided detent lock with a sawtooth pawl and / or via a kinematic mechanism that locks itself in the end position by passing over a dead position.

[0128] 2024 382 WO Page 19

[0129] Reference symbol list

[0130] 1A-1G Vehicle seat

[0131] 10 Seat section

[0132] 100 leg rest

[0133] 11A-11G Backrest

[0134] 110A-110E Storage area

[0135] 111 lower backrest part

[0136] 112 Headrest

[0137] 113 Front

[0138] 114 reverse

[0139] 12 Headrest

[0140] 13 fitting

[0141] 14 Height adjustment device

[0142] 140, 141 swing arm

[0143] 15 Longitudinal adjustment device

[0144] 150 seat rail

[0145] 151 Floor rail

[0146] 16 Drive unit

[0147] 17 Control system

[0148] 18A-18G Retaining element

[0149] 180 support surface

[0150] 181 Leadership

[0151] 182 plate

[0152] 183 Component

[0153] 184, 185 In-depth study

[0154] 186 bags

[0155] 187A, 187B Drive unit

[0156] 188 pyrotechnic actuator

[0157] 19 Sensor

[0158] 2 additional vehicle seats

[0159] 20 Seat section

[0160] 21 Backrest

[0161] 22 Headrest

[0162] 23 Fitting

[0163] 3 vehicles

[0164] 30 Vehicle floor

[0165] 2024 382 WO Page 20

[0166] A Arrangement

[0167] B1, B2 Seat users

[0168] F foot

[0169] R Direction of travel S Swivel axis

[0170] X Vehicle longitudinal axis

[0171] Y vehicle transverse axis

[0172] Z vehicle vertical axis

[0173] 2024 382 WO

Claims

Page 21 Claims 1. Vehicle seat (1A-1G), comprising: a seat section (10) and a backrest (11A-11G) which is movable relative to the seat section (10) between at least one upright seating position in which a seat user (B1) can sit on the vehicle seat (1A-1G) and a storage position, wherein a storage surface (110A-110E) is provided on the backrest (11A-11G) on which the feet (F) of a seat user (B2) located behind the vehicle seat (1A-1G) with respect to a direction of travel (R) can be placed when the backrest (11A-11G) is in the storage position, and a retaining element (18A-18F) which is designed to support the feet (F) placed on the storage surface (110A-110E) against movement in the direction of travel (R).

2. Vehicle seat (1A-1G) according to claim 1, characterized in that the restraint element (18A-18G) with the backrest (11A-11G) in the storage position is movable along the direction of travel (R) relative to the vehicle floor (30) in relation to a state of the vehicle seat (1A-1G) mounted on a vehicle floor (30).

3. Vehicle seat (1A-1G) according to claim 1 or 2, characterized in that the backrest (11A-11G) has a front (113) against which the seat user (B1) sitting on the vehicle seat (1AA-1G) can lean, and a rear (114) opposite the front, wherein the restraint element (18A-18G) is arranged or can be arranged on the rear (114).

4. Vehicle seat (1A-1G) according to claim 3, characterized in that in the storage position at least a part of the front (113) of the backrest (11A-11G) rests on the seat part (10).

5. Vehicle seat (1A-1G) according to one of the preceding claims, characterized in that the restraint element (18A-18G) has a support surface (180) for supporting the feet (F) placed on the storage surface (110A-110E) against the 2024 382 WO Page 22 exhibits movement in the direction of travel (R), wherein the support surface (180) can be aligned at an angle to the storage surface (110A-110E) and / or to the direction of travel (R).

6. Vehicle seat (1A, 1C, 1D, 1G) according to claim 5, characterized in that the support surface (180) is movable relative to at least a part of the backrest (11A, 11C, 11D, 11G).

7. Vehicle seat (1A, 1C, 1D, 1G) according to claim 6, characterized in that the support surface (180) is movable relative to at least the part of the backrest (11A, 11C, 11D, 11G) by means of a drive unit (187A, 187B).

8. Vehicle seat (1G) according to claim 7, characterized in that the drive unit (187B) comprises a pyrotechnic actuator (188).

9. Vehicle seat (1A) according to one of the preceding claims, characterized in that the restraint element (18A) is slidably mounted on the backrest (11A).

10. Vehicle seat (1A, 1C, 1D, 1G) according to one of the preceding claims, characterized in that the restraint element (18A, 18C, 18D, 18G) is pivotably mounted on the backrest (11A).

11. Vehicle seat (1A) according to one of the preceding claims, characterized in that the restraint element (18A) forms a footrest or a table when the backrest (11A) is arranged in at least one upright seating position.

12. Vehicle seat (1C) according to one of claims 1 to 10, characterized in that the backrest (11C) has a lower backrest part (111) and a [missing element] attached to the lower backrest part 2024 382 WO Page 23 (111) comprises a movably mounted backrest head (112), wherein the backrest head (112) forms the retaining element (18C).

13. Vehicle seat (1C) according to claim 12, characterized in that the backrest head (112) is pivotable at an angle relative to the lower backrest part (111) which is open away from the seat part (10).

14. Vehicle seat (1 D) according to one of claims 1 to 10, characterized in that a headrest (12) is movably mounted on the backrest (11 D), wherein the headrest (12) forms the retaining element (18D).

15. Vehicle seat (1 D) according to claim 14, characterized in that the headrest (12) is pivotable relative to the backrest (11 D) onto a rear side (114) of the backrest (11 D).

16. Vehicle seat (1 B, 1 E) according to one of claims 1 to 10, characterized in that the retaining element (18B, 18E) is formed in a recess (184, 185) of the backrest (11 B, 11 E).

17. Vehicle seat (1 E) according to claim 16, characterized in that a component (183) is movably mounted relative to the backrest (11 E) in order to release the support surface (180).

18. Vehicle seat (1 E) according to claim 17, characterized in that the component (183) is slidably mounted on the backrest (11 E).

19. Vehicle seat (1A-1G) according to one of the preceding claims, characterized in that a control system (17) is provided which is configured to adjust a distance of the restraint element (18A-18F) relative to another vehicle seat (2). 2024 382 WO Page 24 20. Arrangement (A), in particular for a vehicle (3), comprising: a vehicle seat (1A-1G) according to one of the preceding claims and - a further vehicle seat (2) arranged behind the vehicle seat (1A-1G). 2024 382 WO

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