Seat, in particular a vehicle seat

Abstract

The invention relates to a seat (S), in particular a vehicle seat (100), comprising at least one seat structure (400) and an adjustment device (500) with at least one pivot mechanism (200) for pivoting the seat structure (400) about a pivot axis (502), wherein the seat structure (400) comprises at least one seat frame (122A) and a seat shell (124) that is pivotally mounted on the seat frame (122A), wherein the pivot mechanism (200) is coupled to the seat structure (400) and designed to move the seat frame (122A) about the pivot axis (502) and, depending on a pivot direction (R1', R2') of the seat frame (122A), to move the seat shell (124) relative to same and in a pivot direction (R1, R2) opposite the pivot direction (R1', R2') of the seat frame (122A).

Description

[0001] Adient US LLC, Plymouth, Ml (US)

[0002] SEAT, ESPECIALLY VEHICLE SEAT

[0003] The invention relates to a seat, in particular a vehicle seat.

[0004] State of the art

[0005] Adjustable vehicle seats, for example reclining seats, are known from the prior art which can be controlled in such a way that when a seat surface is adjusted, a backrest moves along with it. However, the movement of the backrest and the seat surface can create a relative movement with respect to an occupant. This relative movement is known, for example, as "shirt shear", which describes a sliding movement of a surface or front surface of the backrest relative to the occupant. In a conventional seat, there is a pivot at the bottom of the backrest, and the backrest rotates backwards around the pivot. When the backrest rotates backwards, a relative movement occurs between the surface of the backrest and the occupant's back, which can lead to shearing of a piece of clothing.With tilt adjustment mechanisms, contact between the seat, particularly the seat surface, and the occupant's thighs may be lost when the seat is tilted and / or the occupant leans back. Furthermore, when the seat is tilted, contact between the seat, particularly the backrest and / or a headrest, and the back of the occupant's head and / or shoulders may be lost, forcing the occupant to adopt a forward-facing head position and / or a forward-leaning posture during travel in order to maintain a view of the roadway.

[0006] Task

[0007] The invention is based on the object of improving a seat, in particular a vehicle seat, of the type mentioned at the outset, in particular to provide a seat which is adjustable in space, for example tiltable, in which at least the seat surface of the seat is kept in constant contact with the thighs of the occupant, and to provide a seat in which the backrest is kept largely in constant contact with the torso of the occupant when he tilts and / or leans back in space.

[0008] Solution

[0009] In a first exemplary embodiment, this object is achieved according to the invention by a seat, in particular a vehicle seat, comprising at least one seat structure and an adjusting device with at least one pivoting mechanism for pivoting the seat structure about a pivot axis, wherein the seat structure comprises at least one seat frame and a seat shell pivotably mounted on the seat frame, and wherein the pivoting mechanism is coupled to the seat structure and is designed to move the seat frame about the pivot axis and, depending on a pivoting direction of the seat frame, to move the seat shell relative to the seat frame and in a pivoting direction opposite to the pivoting direction of the seat frame.The advantages achieved by the invention are that a seat, in particular a vehicle seat, can be provided with a seat frame, wherein the seat frame is designed to be freely tiltable, inclinable or pivotable within a space and has at least one seat shell that is movable relative to the seat frame, for example tiltable, inclinable or pivotable, such that the seat shell can follow the movement of the legs of a person sitting on the seat. The pivotable connection of the seat shell to the seat frame increases ergonomic comfort, for example sitting comfort and / or lying comfort, and improves the sitting and / or lying posture of the body. The seat can be adjusted such that parts of the body of the person sitting on the seat, also called the occupant, remain sufficiently ergonomically supported or leaning.

[0010] Furthermore, the pivoting of the seat shell in a pivoting direction opposite to the pivoting direction of the seat frame advantageously allows the occupant to maintain the same heel point with respect to a floor, in particular the vehicle floor, during seat adjustment.

[0011] Furthermore, pivoting the seat shell in a direction opposite to the pivoting direction of the seat frame advantageously allows the occupant to maintain a larger body region in constant contact with the seat structure, for example, the occupant's torso with a backrest and the occupant's buttocks with a seat surface. The seat surface and the backrest can be part of a one-piece seat structure. The seat structure can, for example, comprise at least one seat surface structure and / or a backrest structure, later also referred to as a backrest structure. The constant contact of the occupant's body with the seat structure prevents any relative movement between the body, for example, the back and the backrest and / or the buttocks and the seat surface and optionally also the backrest, which, for example, prevents so-called "shirt scissors.": “shirt shear”) is avoided.

[0012] Furthermore, pivoting the seat shell in a direction opposite to the pivoting direction of the seat frame advantageously allows the occupant to change a centerline of the seat structure, particularly from a backrest or backrest, to support the occupant's lumbar lordosis when the seat structure is adjusted spatially, for example, pivoted, tilted, or inclined. A change in the seat contour in conjunction with the pivoting of the seat shell, for example, in the form of frontal upholstery, ensures that the occupant experiences natural support for their lumbar lordosis while pivoting the seat structure.

[0013] The seat frame can be designed as a further seat shell. In other words, the seat structure can comprise at least one seat surface structure with a first seat shell and a second seat shell pivotally mounted on the first seat shell, and at least one pivoting mechanism for pivoting the seat surface structure about a pivot axis or relative to a floor, in particular the vehicle floor. The pivoting mechanism is configured to pivot the second seat shell in an opposite direction when the first seat shell pivots.

[0014] For example, the second seat shell is arranged in a front shell region of the first seat shell, viewed in the longitudinal direction. Because the second seat shell is mounted on the first seat shell and pivots in an opposite direction when the first seat shell is pivoted, the seat surface structure can follow the movement of the occupant's legs, ensuring constant contact of the occupant's thighs with the seat surface. Pivoting, for example inclining or tilting, the second, for example front, seat shell allows the occupant to maintain a heel point in any seating position. This can improve seating comfort and the occupant's posture during and after seat adjustment.

[0015] A rear region of the seat shell can have a pivot point mounted on the seat frame, wherein pivoting of the seat shell about the pivot point causes a change in the distance of a front region of the seat shell relative to the seat frame.

[0016] The pivot point of the seat shell can be located at least in the area of ​​the seat frame's pivot axis. For example, a seat shell's pivot axis defined by the pivot point can be parallel to or offset from the seat frame's pivot axis. Alternatively, the pivot axis and pivot axis can be arranged so as to overlap.

[0017] The pivot mechanism can be designed such that the pivot mechanism moves the seat frame about an imaginary pivot axis running perpendicular to the pivoting direction of the seat frame. An imaginary pivot axis can, for example, be understood as a fictitious, imaginary pivot axis. The pivot mechanism allows the seat frame to be pivoted largely independently of coupling points between the pivot mechanism and the seat frame. This can have the advantage that the seat structure can be designed to be freely pivotable in space, enabling a comfort-enhancing and ergonomic movement sequence. The pivot axis can be aligned such that a hip joint or a position of the hip joint is always kept above the pivot axis and, optionally, also on a common imaginary line.Advantages of the invention can consist in providing a one-piece seat and dispensing with conventional fittings between the seat surface and backrest. The seat can be designed in particular to be lightweight and with fewer parts. The entire seat can be pivoted in space, whereby an upper body angle of up to 45° can be achieved by means of the pivotally mounted seat shell and its dependent pivoting relative to the seat frame. Simultaneously with the pivoting movement of the seat frame in space, the seat shell can rotate downwards or upwards around the pivot point. This can ensure that lower limbs, for example the legs of the occupant, can be pivoted around the anatomical hip joint in an ergonomically advantageous manner. The angle between the thigh and torso can be ergonomically increased or decreased, thereby achieving a neutral posture and relieving strain on the lumbar spine, for example.

[0018] The seat shell can be a leg support. The seat shell can be designed as a cushion or upholstered shell. The seat shell can rotate about a rotation axis directly below the anatomical hip joint and / or its anatomical rotation axis and / or slightly in front of or behind a position of the occupant's ischial tuberosities. For example, the rotation axis or pivot point of the seat shell can run largely through or near the center of hip rotation.

[0019] The pivoting mechanism may comprise at least one front swing arm and at least one rear swing arm, each connecting the seat frame to a fixed base frame, wherein the front swing arm or the rear swing arm has at least two swing arms, for example also referred to as swing arms or lever arms, which are adjustable at an angle relative to one another in order to pivot the seat frame.

[0020] Furthermore, at least one first drive unit can be provided, which is configured to pivot the seat frame during operation. The first drive unit has at least one connection point fixed to the seat frame, in particular a fixed position, and a connection point connected to the pivoting mechanism and rotatably mounted. The drive unit can be attached to a crossbar of the seat frame with its fixed connection point. The drive unit can be connected to one of the swing arms of the rear swing arm or the front swing arm with its rotatably mounted connection point.

[0021] Furthermore, at least one second drive unit can be provided, which is configured to pivot the seat shell relative to the seat frame during operation. The drive unit has at least one connection point fixed to the seat shell, in particular a fixed position, and one connection point rotatably mounted on the seat frame, or vice versa. The drive unit can be rotatably mounted with its connection point on the crossbar of the seat frame. The drive unit can be attached with its fixed connection point to an underside, for example to a bracket arranged on the underside or to a holding arm of the seat shell.

[0022] Furthermore, at least one third drive unit can be provided, which is configured to adjust the height of the seat frame relative to a base frame. The third drive unit has at least one connection point fixed to a base frame, in particular a fixed position, and a connection point connected to the pivot mechanism and rotatably mounted. The drive unit can be attached to a base frame with its fixed connection point. The drive unit can be connected to one of the rockers with its rotatably mounted connection point.

[0023] The drive units, in particular at least the first drive unit and the second drive unit, can be operated in a synchronized manner. For example, an adjustment movement of the drive units can be synchronized. For example, a synchronization device and / or a suitable control unit can be provided, which can each be signal-connected to the drive units. When the drive units, i.e. at least the first and second drive units, are synchronized, adjustment movements of drive motors of the drive units can be synchronized. The third drive unit can be operated independently and / or synchronized with the other two drive units. It is also possible for the second drive unit to be operable independently of the first drive unit in a set seating position.

[0024] The adjustment device may comprise at least one height adjustment mechanism connected to the pivoting mechanism and / or a longitudinal adjustment device.

[0025] In a second exemplary embodiment, the object is achieved according to the invention by a seat comprising at least one seat structure, for example a backrest structure, with a first back shell, for example a backrest frame, and a second back shell pivotally mounted on the first back shell, for example an upholstered shell and / or a back support shell, and at least one pivoting mechanism for pivoting the seat structure, in particular the backrest structure, about a pivot axis, wherein the pivoting mechanism is coupled to the backrest structure and is configured to pivot the second back shell relative to a frontal plane of the first back shell and / or to move the first back shell about the pivot axis and, depending on a pivoting direction of the first back shell, to move the second back shell relative to the first back shell and in a pivoting direction opposite to the pivoting direction of the first back shell.A lower region of the second back shell can have a pivot point mounted on the first back shell, in particular on the backrest frame, wherein pivoting of the second back shell about the pivot point causes a change in the distance of an upper region of the second back shell relative to the first back shell.

[0026] Optionally, a headrest structure can additionally be provided which is coupled to the backrest structure. For example, the headrest structure can be connected to the second back shell and pivotally mounted on the first back shell. An upper region of the second back shell can be provided with a headrest structure. For example, the headrest structure can be fixedly connected to the upper region of the second back shell. An upper region of the second back shell can be provided with at least one headrest cushion. Alternatively or optionally additionally, the headrest structure and the second back shell can be formed as a single piece. The pivoting mechanism can be configured to pivot the second back shell and the headrest structure relative to a frontal plane of the first back shell.

[0027] At least one drive unit can be provided, which is configured to pivot the second back shell relative to the first back shell during operation. The first drive unit has at least one connection point fixed to the second back shell, in particular a fixed position, and a connection point connected to the first back shell and rotatably mounted. For example, the second back shell is arranged in an upper shell region of the first back shell, viewed in the vertical direction.

[0028] Because the second back shell is pivotable relative to a frontal plane of the first back shell, the seat structure can follow a movement of the legs of an occupant sitting on the seat.

[0029] This constant contact with the backrest can allow the occupant to experience no relative movement between his back and the backrest, thus avoiding the sliding movement (“shirt shear”) between the seat and the occupant.

[0030] A combination of the features of the aforementioned embodiments can provide a seat, in particular a vehicle seat, in which a centerline of the backrest changes such that the lumbar lordosis of the occupant can be supported when leaning and / or reclining. A movement contour that can be generated by the adjustable back shells, in conjunction with the inclination of the seat shells, in particular the second seat shell, in particular in the form of frontal padding, has the advantage that the occupant experiences natural support for their lumbar lordosis and their thighs during and after seat adjustment.

[0031] In summary, and in other words, the invention provides a seat, in particular a vehicle seat, in which, in every seating position of the seat, a position of the heel point relative to the vehicle floor, a head and shoulder position with a view of the road, and a suitable chest posture or upper body posture can be maintained. Unwanted kyphosis can also be reduced. Furthermore, the seat according to the invention allows a suitable hip angle to be assumed with a neutral back posture. In the event of an accident, the seat enables the rapid assumption of a so-called pre-crash position, for example, through reduced adjustment range and / or rail travel.

[0032] Figures and embodiments of the invention

[0033] The invention is explained in more detail below with reference to advantageous embodiments illustrated in the figures. However, the invention is not limited to these embodiments. They show:

[0034] Fig. 1 : a schematic representation of a vehicle seat with a longitudinal adjustment device according to the prior art,

[0035] Fig. 2: a side view of a seat according to the invention, in particular a vehicle seat, according to a first embodiment, wherein the seat comprises at least one seat surface structure and a backrest structure and is in a first seating position,

[0036] Fig. 3: a side view of the seat according to Fig. 2 in a second seating position,

[0037] Fig. 4: a side view of the seat according to Fig. 2 with a headrest structure, wherein the seat is in the first seating position,

[0038] Fig. 5: a side view of the seat according to Fig. 4 in the second seating position, Fig. 6: a side view of the seat according to Fig. 4 in a third seating position,

[0039] Fig. 7: a side view of the seat according to Fig. 4 in a fourth seating position,

[0040] Fig. 8: a perspective view of a seat structure of a seat, in particular a vehicle seat, with a pivoting mechanism for pivoting the seat structure,

[0041] Fig. 9: a perspective view of the seat structure according to Fig. 8,

[0042] Fig. 10: a perspective bottom view of the seat structure according to Fig. 8,

[0043] Fig. 11 : an exploded view of the seat structure according to Fig. 8,

[0044] Fig. 12: a side view of a seat, in particular a vehicle seat, according to a second exemplary embodiment, wherein the seat comprises at least a seat surface structure, a backrest structure and a headrest structure and is in a first seating position,

[0045] Fig. 13: a side view of the seat according to Fig. 12 in an intermediate position,

[0046] Fig. 14: a side view of the seat according to Fig. 12 in a second seating position,

[0047] Fig. 15: a side view of the seat according to Fig. 12 in a comfort position, Fig. 16: a side view of the seat according to Fig. 12 in the first seating position,

[0048] Fig. 17: a perspective rear view of a backrest structure and a headrest structure attached to the backrest structure,

[0049] Fig. 18: a perspective rear view of the backrest structure and the headrest structure according to Fig. 17 in a first backrest position, and

[0050] Fig. 19: a perspective rear view of the backrest structure and the headrest structure according to Fig. 17 in a second backrest position.

[0051] Corresponding parts are provided with the same reference numerals in all figures.

[0052] A vehicle seat 100, schematically illustrated in Figure 1 according to the prior art, is described below using three spatial directions running perpendicular to one another. A longitudinal direction x, in a vehicle seat 100 installed in the vehicle, runs largely horizontally and preferably parallel to a vehicle longitudinal direction that corresponds to the usual direction of travel of the vehicle. A transverse direction y, which runs perpendicular to the longitudinal direction x, is also oriented horizontally in the vehicle and runs parallel to a vehicle transverse direction. A vertical direction z runs perpendicular to the longitudinal direction x and perpendicular to the transverse direction y. In a vehicle seat 100 installed in the vehicle, the vertical direction z preferably runs parallel to a vehicle vertical axis.The position and direction specifications used, such as front, rear, top, and bottom, refer to a viewing direction of an occupant I sitting in the vehicle seat 100 in a normal sitting position, wherein the vehicle seat 100 is installed in the vehicle, in a position of use suitable for passenger transport with the backrest 104 upright and oriented in the direction of travel as usual. However, the vehicle seat 100 can also be installed or moved in a different orientation, for example, transversely to the direction of travel. Unless otherwise described, the vehicle seat 100 is constructed mirror-symmetrically to a plane running perpendicular to the transverse direction y.

[0053] The backrest 104 can be pivotably mounted on a seat part 102 of the vehicle seat 100. For this purpose, the vehicle seat 100 can optionally comprise a fitting 106, in particular an adjustment fitting, rotary fitting, locking fitting, or wobble fitting.

[0054] The position and direction specifications used, such as radial, axial, and circumferential, refer to a rotational axis 108 of the fitting 106. Radial means perpendicular to the rotational axis 108. Axial means in the direction of or parallel to the rotational axis 108.

[0055] The vehicle seat 100 can optionally include a longitudinal adjustment device 110. The longitudinal adjustment device 110 includes, for example, a rail arrangement 112 with a first rail element 114 and a second rail element 116. The first rail element 114 is adjustable in the longitudinal direction x relative to the second rail element 116. The first rail element 114 is fastened to the seat part 102. The first rail element 114 is, for example, an upper rail or guide rail. The second rail element 116 is fastened to a structural element of a vehicle, for example, a vehicle floor. The second rail element 116 is, for example, a lower rail or floor rail.

[0056] Figure 2 shows a side view of a seat S according to the invention, in particular a vehicle seat 100, according to a first exemplary embodiment, wherein the seat S comprises a seat structure 400, for example formed from frame parts. The seat S, in particular the seat structure 400, comprises at least a seat surface structure 120 for forming the seat part 102 and a backrest structure 140 for forming the backrest 104 and is located in a first seating position P1. The first seating position P1 can be a driving position and / or starting position. The seat S can be adjusted between several seating positions, comfort positions, and / or intermediate positions.

[0057] The seat surface structure 120 comprises a first seat shell 122. The first seat shell 122 can, for example, form a base body or base body of the seat part 102. In the illustrated embodiment, the first seat shell 122 forms a seat frame 122A. Furthermore, the seat surface structure 120 comprises a second seat shell 124 pivotally mounted on the first seat shell 122. The second seat shell 124 can be a frontal shell that can be arranged in the front shell region of the first seat shell 122. The second seat shell 124 can be shorter than the first seat shell 122. The second seat shell 124 can have half the length of the total length of the first seat shell 122. The second seat shell 124 can be provided for supporting the thighs of an occupant I. The second seat shell 124 can be arranged in a front half of the first seat shell 122 and pivotally mounted thereon.

[0058] The seat S comprises an adjustment device 500 with at least one pivoting mechanism 200 for pivoting the seat structure 400 about a pivot axis 502. The pivoting mechanism 200 is designed such that the pivoting mechanism 200 moves the seat frame 122A about an imaginary pivot axis 502 running transversely to the pivoting direction R1', R2', hereinafter also referred to as direction R1', R2', of the seat frame 122A.

[0059] For example, the seat structure 400, for example the seat surface structure 120, comprises a first pivoting mechanism 200 for pivoting the seat surface structure 120, wherein the pivoting mechanism 200 is configured to pivot the second seat shell 124 in an opposite direction R1, R2, in particular pivoting direction R1, R2, when the first seat shell 122 is pivoted in a direction R1', R2'. The first seat shell 122 can be pivoted about a pivot point D1 in a first direction R1' and in a second direction R2'. When the seat shell 122 is pivoted in the first direction R1', the second seat shell 124 is pivoted in a direction R2 opposite to the first direction R1'. The pivot point D1 is in particular an imaginary pivot point D1. When the seat shell 122 is pivoted in the second direction R2', the second seat shell 124 is pivoted in a direction R1 opposite to the second direction R2'.The seat shells 122, 124 can be upholstered shells or cushion shells.

[0060] The seat surface structure 120 and the backrest structure 140 can be formed as a single piece. For example, the first seat shell 122 can be formed as a single piece with the backrest structure 140. The first seat shell 122 and the backrest structure 140 can form a common seat and backrest surface.

[0061] The proposed invention is a vehicle seat 100 that can be adapted to all person sizes for driving activities through a combination of height and length adjustment: The vehicle seat 100 does not have to be designed in the conventional manner with a fitting 106 connecting a seat part 102 to a backrest 104. The entire vehicle seat 100 according to the invention can be adjusted spatially, for example, inclined or tilted, to achieve an upper body angle of up to 45°. Simultaneously with a rotational movement, in particular a tilting movement, of the first seat shell 122 in space, the second seat shell 124 rotates downward about a pivot point D1, which allows the lower limbs to pivot around the anatomical hip joints. This allows an angle between the thigh and torso to increase (for example, up to a maximum of 135°), whereby a neutral posture can be achieved and the lumbar spine can be relieved.

[0062] The first seat shell 122 can rotate about an imaginary axis of rotation defined by the pivot point D1, in particular the pivot axis 502, directly below the anatomical axis of rotation or the hip joints and slightly in front of the ischial tuberosities. Ideally, this axis of rotation should pass exactly through the center of hip rotation.

[0063] During the rotational movement, a relative movement between the upper body of the occupant I and the backrest 104 or between the back of the head of the occupant I and a headrest 118 shown in the other figures is thus largely reduced or even avoided.

[0064] Figure 3 shows a side view of the seat S according to Figure 2 in a second seating position P2. The second seating position P2 can, for example, be a rearwardly inclined or tilted comfort position.

[0065] Figure 4 shows a side view of the seat S with a headrest structure 180 for forming and securing the headrest 118 to the backrest structure 140. The seat S is in the first seating position P1. The headrest structure 180 is arranged on an upper side of the backrest structure 140.

[0066] Figure 5 shows a side view of the seat S according to Figure 4 in the second seating position P2.

[0067] Figure 6 shows a side view of the seat S in a third seating position P3. In the third seating position P3, the seat S can be adjusted downwards in the vertical direction z, in particular height-adjusted.

[0068] Adjustment device 500 may include a height adjustment mechanism 600 connected to pivot mechanism 200. Adjustment device 500 may further include a longitudinal adjustment mechanism, in particular a longitudinal adjustment device 110. Pivot mechanism 200 may, for example, be configured to move seat S both around pivot point D1 and in the vertical direction z. Pivot mechanism 200 may be a combined tilt and height adjuster.

[0069] Figure 7 shows a side view of the seat S according to Figure 6 in a fourth seating position P4. In the fourth seating position P4, the seat S can be adjusted upwards in the vertical direction z, in particular height-adjusted.

[0070] Figure 8 shows a perspective view of a seat surface structure 120 of a seat S, in particular a vehicle seat 100, with a pivoting mechanism 200 for pivoting the seat surface structure 120. The pivoting mechanism 200 can be designed as a tilt and height adjustment kinematics. The pivoting mechanism 200 can be operatively connected to the longitudinal adjustment device 110. For example, the pivoting mechanism 200 can be coupled to a rail arrangement 112 on each of the two sides of the seat. Pivoting the seat S can cause a longitudinal adjustment of the seat S, or vice versa.

[0071] The pivoting mechanism 200 comprises, on each of two seat sides of the seat surface structure 120 arranged offset from one another in a transverse direction y, a joint arrangement 210, for example a four-joint arrangement or multi-joint arrangement, and a drive kinematics 220, which consists, for example, of a number or plurality of drive units 222.

[0072] The drive kinematics 220 is connected to the respective joint arrangement 210 via coupling interfaces 230, as can be seen in an improved manner in Figure 10.

[0073] The joint arrangement 210 is connected, for example, to the first rail element 114 of the rail arrangement 112. The drive kinematics 220 is also attached to the first rail element 114 and is operatively connected to the joint arrangement 210 via the first rail element 114. An adjustment of the seat structure 120 is achieved by a movement of the

[0074] Joint arrangement 210 or joint arrangements 210 relative to the first rail elements 114 by means of the drive kinematics 220.

[0075] The drive units 222 can be spindle drives. The drive units 222 can each include a motor 224, a gear unit 226 connected to the motor 224, and a spindle 228 that is adjustable relative to the gear unit 226.

[0076] For example, at least one drive unit 222 can be attached to the first rail element 114 and connected to at least one adjustment arm 212 of the joint assembly 210. The adjustment arm 212 is connected to the first seat shell 122 and to the first rail element 114. For example, the adjustment arm 212 can be attached to a crossbar 126 connecting the seat sides. The adjustment arm 212 can be connected to a seat side of the first seat shell 122. The adjustment arm 212 is rotatably mounted on the first rail element 114.

[0077] The adjustment arm 212 can be configured as a rear rocker arm 214 of the joint assembly 210. Furthermore, the joint assembly 210 can have at least one front rocker arm 216. The front rocker arm 216 is connected to the seat side of the first seat shell 122. The front rockers 216 of the joint assemblies 210 can be connected to one another via a connecting web 218 (shown in Figure 10), for example in the form of a rod.

[0078] At least one drive unit 222 initiating a movement of the front rockers 216 can be attached to a front crossbar 128 that connects the seat sides of the first seat shell 122. The drive unit 222 is rotatably mounted on the front rocker 216 of at least one of the joint assemblies 210 via a coupling interface 230.

[0079] An adjustment of the seat structure 120 is effected by a movement of the front rockers 216 relative to the fixed crossbar 128 by means of the drive kinematics 220.

[0080] Figure 9 shows a perspective view of the seat structure 120 and

[0081] Figure 10 shows a perspective bottom view of the seat surface structure 120. To pivot the second seat shell 124 relative to the first seat shell 122, a rear end of the second seat shell 124 is pivotally connected to the first seat shell 122. A front end of the second seat shell 124 is connected to the front crossbar 128 via the drive kinematics 220, in particular via at least one drive unit 222 of the drive kinematics 220. By a spindle movement of the drive unit 222, the second seat shell 124 can be pivoted relative to the first seat shell 122 about a pivot point D2.

[0082] The drive kinematics 220 can, for example, be configured such that a movement of the joint arrangement 210 and a movement of the second seat shell 124 are synchronized with each other.

[0083] Figure 11 shows an exploded view of the seat S. The seat structure 400 comprises an adjustment device 500 with a pivoting mechanism 200 for pivoting the seat structure 400 about a pivot axis 502. The seat structure 400 comprises a seat frame 122A and a

[0084] Backrest frame 142A. Seat frame 122A and backrest frame 142A can be formed as a single piece and can be jointly adjustable, in particular pivotable. Furthermore, the seat structure 400 comprises at least one seat shell 124 pivotably mounted on the seat frame 122A. The pivot mechanism 200 is coupled to the seat structure 400 and configured to move the seat frame 122A about the pivot axis 502 and, depending on a pivot direction R1', R2' of the seat frame 122A, to move the seat shell 124 relative to the seat frame 122A and in a pivot direction R1, R2 opposite to the pivot direction R1', R2' of the seat frame 122A. A rear region of the seat shell 124 has a pivot point D2 mounted on the seat frame 122A, wherein pivoting of the seat shell 124 about the pivot point D2 causes a change in the distance of a front region of the seat shell 124 relative to the seat frame 122A.The pivot point D2 of the seat shell 124 is arranged at least in the region of the pivot axis 502 of the seat frame 122A. The pivot mechanism 200 is designed such that the pivot mechanism 200 moves the seat frame 122A about an imaginary pivot axis 502 extending transversely to the pivot direction R1', R2' of the seat frame 122A. The pivot mechanism 200 comprises at least one front pair of rocker arms with two front rockers 216, each rocker arm 216 being assigned to a seat side. The pivot mechanism 200 comprises at least one rear pair of rocker arms consisting of two rear rockers 214, each rocker arm 214 being assigned to a seat side. The rocker arm pairs each connect the seat frame 122A to a fixed base frame 150, the base frame 150 being connectable directly to a vehicle floor or to the longitudinal adjustment device 110.The base frame 150 can, for example, be connected to the first rail element 114, in particular to the upper rail or running rail. In the illustrated embodiment, the front rockers 116 comprise three rocker arms 216A to 216C, which are adjustable at an angle relative to one another in order to pivot the seat frame 122A relative to the base frame 150. The first rocker arm 216A is a support arm or a base arm, wherein the first rocker arm 216A pivotally holds or supports the seat frame 122A on the base frame 150. The first rocker arm 216A has a lower base-fixed.

[0085] Connection point 240 and a connection point 242 connected to the second swing arm 216B. The second swing arm 216B is rotatably mounted on the first swing arm 216A. The second swing arm 216B is connected to the seat frame via a

[0086] Connection point 244 is connected to the seat frame 122A. The second swing arm 216B is connected to the third swing arm 216C via the seat frame-fixed connection point 244. For example, the second swing arm 216B and the third swing arm 216C can be formed as one piece. For example, a one-piece swing arm made up of 216B and 216C can be substantially L-shaped. In the illustrated embodiment, the

[0087] Connecting web 218 passes through the seat frame-fixed connection point 244 and connects the second swing arm 216B to the third swing arm 216C. The second swing arm 216B and the third swing arm 216C are firmly fixed to the connecting web 218. The second swing arm 216B and the third swing arm 216C are jointly pivotable relative to the first swing arm 216A, for example, adjustable at an angle relative to the first swing arm 216A. A front region of the seat frame 122A can be moved, in particular pivoted, about the pivot axis 502 relative to the first swing arm 216A. The rear swing arms 214 can be configured to pivotally hold the seat frame 122A. At least one of the front swing arms 116 is coupled to a first drive unit 222, 222A. For example, the first drive unit 222A is connected to the third swing arm 216C via the coupling interface 230.The coupling interface 230 forms a connection point 246 through which the drive unit 222A is rotatably mounted on the swing arm 116 of the pivot mechanism 200. Another end of the first drive unit 222A is fixed to the seat frame 122A. For this purpose, the first drive unit 222A has a

[0088] Seat frame 122A has a connection point 248 fixed to it. For example, the connection point 246 is provided on the crossbar 128 of the seat frame 122A. The crossbar 128 can have fixed holding arms 130 for fastening the first drive unit 222A to the seat frame 122A. At least one second drive unit 222, 222B is provided, which is configured to pivot the seat shell 124 relative to the seat frame 122A during operation. The second drive unit 222B has a connection point 250 rotatably mounted on the seat frame 122A and a connection point 252 fixed to the seat shell 124. The connection point 250 is provided on the crossbar 128. The crossbar 128 can have at least one further holding arm 132 for rotatably mounting the second drive unit 222B on the

[0089] Seat frame 122A. At least one third drive unit 222, 222C can be provided, which is coupled to at least one of the rear rockers 214. The rear rocker 214 or the rear rockers 214 is / are rotatably mounted on the base frame 150. During operation of the third drive unit 222C, the rear rockers 214 can be pivoted relative to the base frame 150 to adjust the height of the seat S.

[0090] Figure 12 shows a side view of a seat S, in particular vehicle seat 100, according to a second embodiment, wherein the seat S has at least one seat surface structure 120, a

[0091] Backrest structure 140 and a headrest structure 180 and is in a first seating position P1.

[0092] The backrest structure 140 comprises a first back shell 142, in particular a backrest frame 142A. The first back shell 142 can, for example, form a main body or base body of the backrest 104. The backrest structure 140 further comprises a second back shell 144, for example an additional back support shell, pivotally mounted on the first back shell 142. The second back shell 144 can be a shoulder support shell, which can be arranged in the upper shell region of the first back shell 142. The second back shell 144 can be shorter than the first back shell 142. The second back shell 144 can have a length half the total length of the first back shell 142. The second back shell 144 can be provided for supporting the shoulders and / or a head of the occupant I. The second back shell 144 can be arranged in an upper half of the first back shell 142 and pivotally mounted thereon.

[0093] Furthermore, the seat S comprises a second pivoting mechanism 300 for pivoting the backrest structure 140, wherein the pivoting mechanism 300 is configured to pivot the second back shell 144 relative to a frontal plane E1 of the first back shell 142.

[0094] Optionally, a headrest structure 180 can additionally be provided, which is coupled to the backrest structure 140. For example, the headrest structure 180 can be connected to the second back shell 144 and pivotally mounted on the first back shell 142. The pivot mechanism 300 can be configured to pivot the second back shell 144 and the headrest structure 180 relative to the frontal plane E1 of the first back shell 142.

[0095] The second back shell 144 and optionally the headrest structure 180 are pivotable about a pivot point D3. The second back shell 144 and optionally the

[0096] Headrest structure 180 can be pivoted about the pivot point D3 in two directions R3, R4 indicated by arrows.

[0097] Pivoting mechanism 300 can be set such that when the first back shell 142 is pivoted, the second back shell 144 pivots in an opposite direction R3, R4. When the first back shell 142 is pivoted in a first direction R3', the second back shell 144 is pivoted in a direction R4 opposite to the first direction R3'. When the first back shell 142 is pivoted in a second direction R4', the second back shell 144 can be pivoted in a direction R3 opposite to the second direction R4'. Figure 13 shows a side view of the seat S according to Figure 12 in an intermediate position Z1. The first back shell 142 is adjusted backwards relative to the first seating position P1, while the second back shell 144 is adjusted forwards.

[0098] Figure 14 shows a side view of the seat S according to Figure 12 in a second seating position P2. The first back shell 142 is adjusted further rearward relative to the intermediate position Z1, while the second back shell 144 is adjusted further forward.

[0099] Figure 15 shows a side view of the seat S according to Figure 12 in a comfort position, in particular a further intermediate position Z2. In this position, the first back shell 142 is in the rearmost tilt position and the second back shell 144 is moved back toward the frontal plane E1.

[0100] Subsequently, while maintaining constant contact between the back of the head and the headrest structure 180 and / or between the shoulders and the backrest structure 140, the seat S can be moved from the intermediate position Z2 to the first position P1, as shown in Figure 16.

[0101] Figure 17 shows a perspective rear view of a backrest structure 140 and a headrest structure 180 attached to the backrest structure 140. Furthermore, a pivoting mechanism 300 is provided. The pivoting mechanism 300 may include a joint arrangement 310 and a drive kinematics 320 with at least one drive unit 322.

[0102] The drive unit 322 comprises a motor 324, a gear unit 326 connected to the motor 324, and a spindle 328 adjustable relative to the gear unit 326. The drive unit 322 is pivotally mounted on the first back shell 142, for example, about a pivot point D4.

[0103] The second back shell 144 is pivotally mounted on the first back shell 142 via the pivot point D3. The headrest structure 180 is pivotable about the pivot point D4. The headrest structure 180 is attached to the second back shell 144.

[0104] By moving the spindle 328 relative to the gear unit 326, the second back shell 144 and the headrest structure 180 can be pivoted.

[0105] The back shell 144 can be arranged, for example, on the joint arrangement 310. The back shell 144 can be attached to lateral rockers 312 of the joint arrangement 310. The lateral rockers 312 can each be pivotally mounted on the first back shell 144. The respective lateral rocker 312 is connected to a seat side of the first back shell 142. The lateral rockers 312 are connected to one another via a connecting web 314. The headrest structure 180 can be connected, for example, to the second back shell 144 via the connecting web 314.

[0106] Figure 18 shows a perspective rear view of the backrest structure 140 and the headrest structure 180 according to Figure 17 in a first reclining position, and Figure 19 shows a perspective rear view of the backrest structure 140 and the headrest structure 180 according to Figure 17 in a second reclining position. List of Reference Symbols

[0107] 100 vehicle seats

[0108] 102 Seat part

[0109] 104 Backrest

[0110] 106 Fittings

[0111] 108 axis of rotation

[0112] 110 Longitudinal adjustment device

[0113] 112 Rail arrangement

[0114] 114 First rail element

[0115] 116 Second rail element

[0116] 118 Headrest

[0117] 120 Seat structure

[0118] 122 first seat shell

[0119] 122A seat frame

[0120] 124 second seat shell

[0121] 126 Crossbar

[0122] 128 Crossbar

[0123] 130 Holding arm

[0124] 132 Holding arm

[0125] 140 backrest structure

[0126] 142 back shell

[0127] 142A Backrest frame

[0128] 144 back shell

[0129] 150 base frame

[0130] 180 headrest structure

[0131] 200 swivel mechanism

[0132] 210 Joint arrangement

[0133] 212 Adjustment arm

[0134] 214 rear swing arm 216 front swing arm

[0135] 216A to 216C swing arm

[0136] 218 connecting bridge

[0137] 220 Drive kinematics

[0138] 222, 222A to 222C drive unit

[0139] 224 engine

[0140] 226 Gear unit

[0141] 228 spindle

[0142] 230 coupling interfaces

[0143] 240 to 252 connection point

[0144] 300 swivel mechanism

[0145] 310 joint arrangement

[0146] 312 side swing arm

[0147] 314 connecting bridge

[0148] 320 Drive kinematics

[0149] 322 drive unit

[0150] 324 engine

[0151] 326 Gearbox unit

[0152] 328 spindle

[0153] 400 seat structure

[0154] 500 adjustment device

[0155] 502 swivel axis

[0156] 600 height adjustment mechanism

[0157] D1 to D4 pivot point

[0158] E1 Frontal plane

[0159] I Inmate

[0160] P1 to P4 seating position

[0161] R1 to R4' direction, especially swivel direction

[0162] S seat

[0163] Z1 , Z2 Intermediate position x Longitudinal direction y Transverse direction z Vertical direction

Claims

Claims 1. Seat (S), in particular vehicle seat (100), comprising at least - a seating structure (400) and - an adjusting device (500) with at least one pivoting mechanism (200) for pivoting the seat structure (400) about a pivot axis (502), characterized in that the seat structure (400) comprises at least one seat frame (122A) and a seat shell (124) pivotably mounted on the seat frame (122A), wherein the pivoting mechanism (200) is coupled to the seat structure (400) and is designed to move the seat frame (122A) about the pivot axis (502) and, depending on a pivoting direction (R1 ', R2') of the seat frame (122A), to move the seat shell (124) relative to the seat frame (122A) and in a pivoting direction (R1, R2) opposite to the pivoting direction (R1 ', R2') of the seat frame (122A).

2. Seat (S) according to claim 1, characterized in that a rear region of the seat shell (124) has a pivot point (D2) mounted on the seat frame (122A), wherein pivoting of the seat shell (124) about the pivot point (D2) causes a change in the distance of a front region of the seat shell (124) relative to the seat frame (122A).

3. Seat (S) according to claim 2, characterized in that the pivot point (D2) of the seat shell (124) is arranged at least in the region of the pivot axis (502) of the seat frame (122A). Seat (S) according to one of the preceding claims, characterized in that the pivoting mechanism (200) is designed such that the pivoting mechanism (200) moves the seat frame (122A) about an imaginary pivot axis (502) extending transversely to the pivoting direction (R1', R2') of the seat frame (122A). Seat (S) according to one of the preceding claims, characterized in that the pivoting mechanism (200) comprises at least one front rocker (216) and at least one rear rocker (214), which each connect the seat frame (122A) to a fixed base frame (150), wherein the front rocker (216) or the rear rocker (214) has at least two rocker arms (216A to 216C) which are adjustable at an angle relative to one another in order to pivot the seat frame (122A). Seat (S) according to one of the preceding claims, characterized in that at least one first drive unit (222, 222A) is provided which is configured to pivot the seat frame (122A) during operation, wherein the first drive unit (222, 222A) has at least one connection point (248) fixed to the seat frame (122A) and a connection point (246) connected to the pivot mechanism (200) and rotatably mounted.Seat (S) according to one of the preceding claims, characterized in that at least one second drive unit (222, 222B) is provided, which is designed to pivot the seat shell (124) relative to the seat frame (122A) during operation, wherein the second drive unit (222, 222B) has at least one connection point (252) fixed to the seat shell (124) and one connection point (250) rotatably mounted on the seat frame (122A). Seat (S) according to claim 7, characterized in that the drive units (222, 222A to 222C) can be operated in a synchronized manner. Seat (S) according to one of the preceding claims, characterized in that the adjusting device (500) comprises at least one height adjustment mechanism (600) connected to the pivoting mechanism (200) and / or a longitudinal adjustment device (110). Seat (S) according to one of the preceding claims, wherein the seat structure (400) comprises a backrest frame (124A) which is firmly connected to the seat frame (122A) and / or is formed in one piece.

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