Seat components

Abstract

The invention relates to a seat assembly (1, 100), in particular a floating seat, comprising: - at least one seat shell (2) having a seat surface area (2.2) and a backrest area (2.1); - a base element (3) on which the seat shell (2) is adjustably arranged; - an adjustment mechanism (4, 40) for adjusting the seat shell (2) relative to the base element (3) and / or a seat base (9), wherein the adjustment mechanism (4, 40) has at least one adjustment unit (4.1, 4.2) for adjusting the seat shell (2) and at least one drive unit (5.1, 5.2) designed to lock the base element (3) and the seat shell (3) in an appropriate position in a self-locking manner, and wherein the locking can be released by a force introduced into the adjustment unit (4.1, 4.2) by an occupant sitting in the seat shell (2) via the seat shell (2) and by a force introduced into the adjustment unit (4.1, 4.2) by the drive unit (5.1, 5.2).

Description

Technical Field

[0001] The invention relates to a seat assembly for a vehicle, comprising a seat, in particular a floating seat; in particular a vehicle seat which is adjustable relative to a body floor, in particular adjustable in length, tiltable, rotatable and / or pivotable. Background Art

[0002] Adjustable seats, in particular vehicle seats such as floating seats, are known in the prior art for maximizing comfort. Typically, the seat of such a seat assembly comprises a locking mechanism and an adjustment mechanism for locking or unlocking the floating seat. Summary of the invention

[0003] The object of the present invention is to provide a seat assembly with a seat, in particular a floating seat, which has improved comfort and better safety.

[0004] The seat assembly according to the invention comprises at least one seat having a seat surface area and a backrest area; a base element on which the seat is adjustably arranged; at least one adjustment unit for adjusting the seat relative to the base element and / or the seat base; and at least one drive unit, which is configured to lock the base element and the seat in a self-locking manner, and wherein the locking can be released by a force introduced into the adjustment unit by an occupant seated in the seat via the seat and also by a force introduced into the adjustment unit by the drive unit.

[0005] The invention allows in a simple manner to combine an autonomous adjustment of the center of gravity of a person sitting in the seat by switching and a motorized adjustment based on a set or activated adjustment mode.

[0006] The seat comprises, for example, a seat surface and a backrest which are arranged fixedly relative to one another. The seat adjustment is effected by body movements of an occupant sitting in the seat. In contrast to previously known seat adjustment devices, the adjustment about one or more adjustment axes is not effected by means of a manually controlled input device but only by means of a shifting of the center of gravity or center of support of the occupant against the seat, in particular against the seat surface of the seat.

[0007] In a possible embodiment, the seat is constructed as a seat shell. Instead of a shell form, the seat can be formed by a seat part and a backrest. These can be separate seat parts connected together. Alternatively, the seat can be formed in one piece.

[0008] The invention also allows the seat to be adjusted even when there is no passenger. For example, the seat can be automatically brought back to a "normal" starting position or a position that makes entry / exit easier. This adjustment can be made not only when the seat is "idle", but also when an occupant is seated in the seat. For example, stored positions, such as seat positions or slightly or significantly tilted positions, can be automatically restored.

[0009] In other words, the seat comprises a mechanical motorized adjustment device utilizing the self-locking principle, so that a separate locking device can be omitted.

[0010] Another embodiment provides that at least one force sensor is arranged in the force flow between the seat and the base element. The force sensor is arranged and configured such that it measures the forces acting on the adjustment unit. The force sensor is coupled to the drive unit in this case so that the self-locking of the drive unit is released or at least reduced when the adjustment mode is activated and forces are applied to the adjustment unit after a movement of an occupant in the seat. For example, in this case, the occupant has activated an adjustment mode of the seat so that, due to the shifting of the center of gravity of the occupant or a corresponding support located in the seat shell, the seat is automatically moved accordingly.

[0011] Another aspect provides a control unit coupled to the drive unit, the force sensor and / or the activation unit. Here, the control unit is coupled to the force sensor, the drive unit and / or the activation unit in order to activate a regulating mode for signaling and / or control purposes.

[0012] A further embodiment provides that an adjustment command of the occupant is determined via an input unit, for example a switch or a voice signal, and / or via an activation unit. By inputting an adjustment request or an adjustment mode via an input unit, for example via a voice command or by actuating a switch, in particular one of a plurality of adjustment modes can be activated. Alternatively or additionally, the seat can include a plurality of contact sensors, for example also sensors for detecting seat occupancy, as activation units in order to activate the adjustment mode. Alternatively or additionally, the adjustment command can also be determined using fewer sensors, which detect force components in the actuation direction of the drive unit close to the drive device.

[0013] In a possible embodiment, a floating mode is activated, wherein the control unit is configured to move the seat in the activated floating mode such that the seat follows the body movement of an occupant sitting in the seat. The seat, in particular the seat shell, is not locked in an assumed seat position.

[0014] Alternatively, an adjustment mode may be activated, wherein the control unit is configured to move the seat in the activated adjustment mode such that the seat follows the body movement of an occupant sitting in the seat into a desired seat position and wherein the seat is locked in the desired seat position.

[0015] In a further alternative embodiment, a driving comfort mode can be activated, wherein the control unit is designed to adjust the seat in the activated driving comfort mode as a function of the instantaneous driving movement of the vehicle.

[0016] In another embodiment, the adjustment unit is designed to perform an adjustment movement of the seat relative to the base element. For example, the adjustment unit is designed to perform an arcuate, circular and / or linear adjustment. In another embodiment, the adjustment unit is configured as a spindle drive and / or a track adjuster, in particular a circular adjuster and / or a linear longitudinal and / or transverse adjuster. Alternatively, the adjustment unit can be configured as a cable mechanism or a combination of multiple different types of adjustment units. For example, the cable mechanism is configured as an arcuate cable with a circumferential cable.

[0017] Another embodiment provides that the drive unit comprises at least one gear motor unit, which is coupled to the adjustment unit, in particular to the cable mechanism and / or the track adjuster. The drive unit comprises and actuates, for example, a Bowden cable mechanism or a spindle, which actuates a cable of the cable mechanism and / or a track of at least one adjustment unit, which acts on a load-bearing part coupled to the seat for movement purposes.

[0018] In a possible embodiment, the gear motor unit is configured as a self-locking worm gear with a motor. For movement purposes, a cable or rail of a cable mechanism is coupled to the self-locking worm gear of the gear motor unit. For example, the cable is held by two deflection rollers, which are driven by the gear motor unit via a Bowden cable of a Bowden cable mechanism. Furthermore, the cable is coupled to a load-bearing part attached to the seat.

[0019] If the carrier part substantially follows the arc or arc segment of the seat shell or other shape of the seat surface and the cable rests on the seat side on the arc segment, the adjustment mechanism can be designed to be very rigid, since almost no length adjustment is required for the cable. The seat is locked in particular by the self-locking of the cable and the worm gear, but if a motor is used, the seat can also be adjusted via the motor.

[0020] Furthermore, the seat and the base element and / or the seat base and the force sensor arranged therebetween are actively coupled so that the forces introduced by an occupant sitting in the seat act on the force sensor as a resultant force. In particular, in order to primarily measure only the forces introduced into the seat by the occupant, the adjustment mechanism, in particular the adjustment unit and its components (e.g. cable mechanism, deflection roller and carrier), and the drive unit are supported against the base element and / or the seat base, for example the vehicle floor, via the force sensor.

[0021] By arranging the force sensor between the seat base and the seat, wherein the seat components, such as the adjustment unit, the drive unit and the carrier, are mounted on a structural support, it is ensured that the preload required by the adjustment unit to ensure a free play, such as the preload required for the cables of a cable mechanism, is not superimposed on the force measurement signal, but only the resultant force from the adjustment command acts on the force sensor.

[0022] For this purpose, a base element with at least an adjustment unit and / or a drive unit and / or the base element itself is mounted via a support point on a seat base, for example on a vehicle floor. To ensure this single force transmission point, the adjustment unit and / or the drive unit is mounted against the seat base at the support point so that the force component in the measuring direction is influenced as little as possible.

[0023] For a compact design of the seat assembly, both the drive unit and the adjustment unit and / or the control unit can be allocated to the base element. Furthermore, a separate guidance of the adjustment unit, for example a separate guidance of the cables, can be provided. Furthermore, the guidance of the cables over the deflection rollers and their movement via the Bowden cables allows the drive unit to be allocated to the base element, so that the seat shell carries less weight. This also simplifies the power supply to the motor.

[0024] In order to rotate the seat about its vertical axis, a separate adjustment device can be provided. The separate adjustment device comprises a further drive unit formed, for example, by a motor and a worm gear, which is arranged directly at the pivot point of the seat or along an arc section of the seat shell of the seat with the pivot point as the center point without a cable mechanism, or is coupled to the seat or the seat shell, wherein a further force sensor is arranged as a transmission element for tangential forces between the seat or the seat shell and the base element and measures the tangential forces.

[0025] Furthermore, the force threshold can be parameterized. Since the force threshold, the time behavior of the adjustment mechanism and the transfer factors of the force application and the adjustment speed can be parameterized, the adjustment behavior of the seat can be adjusted and modified. In particular, further sensors for position determination can allow position-dependent adjustment parameters to be set.

[0026] Furthermore, a plurality of end stops can be provided to limit the adjustment movement of the seat. Furthermore, a entrapment protection device based on a seat environment sensor can be provided. Furthermore, environmental influences such as vehicle acceleration or deceleration can be taken into account, in particular compensated for. For this purpose, vehicle parameters such as vehicle acceleration or deceleration can be determined by the control unit and adapted control signals for the drive unit can be generated accordingly.

[0027] The seat shell can also be provided with an overload protection for absorbing overload forces. The overload protection prevents strong forces that have to be dissipated by the adjustment unit and the self-locking drive unit, for example due to an accident. Such an overload protection is formed, for example, by two T-bars, the foot points of which are mounted on the seat and connected together. For example, a cable, in particular a steel cable or a spindle, is attached above the crossbar of the T-bar. A sawtooth structure opposite to the other bar is provided below each bar.

[0028] In another embodiment, the seat is designed as a seat shell having a seat surface area and a backrest area, wherein the seat shell is adjustable relative to a base element in at least two rotational degrees of freedom by means of an adjustment mechanism, in particular being rotatable, tiltable and / or pivotable, wherein the adjustment mechanism comprises at least one adjustment unit for adjusting the seat shell in at least one rotational degree of freedom and has at least one associated drive unit which can be controlled by means of a control unit for adjusting the seat shell in at least one rotational degree of freedom, and wherein at least one force sensor is arranged in the force flow between at least one drive unit and the corresponding adjustment unit and is connected to the control unit for signaling and / or control purposes.

[0029] The advantages achieved by the invention include in particular that such a seat of a seat assembly can be adjusted under control according to the body movements of a person sitting in the seat.

[0030] Thus, the seat, in particular the seat shell, can automatically assume the desired position. By means of this direct force-controlled adjustment mechanism, the seat can be adjusted or moved in the manner of a free-floating seat (also referred to as a floating seat), in particular can be tilted forwards or backwards or sideways and rotated around a vertical axis.

[0031] To this end, the force sensor is located directly in the force flow between the seat, in particular an adjustment unit (e.g. a pivot mechanism or a swivel mechanism or a tilt mechanism) and a base element, in particular an associated drive unit (e.g. a drive unit for a pivot mechanism, a drive unit for a swivel mechanism and a drive unit for a tilt mechanism) and / or a seat base, in particular a vehicle floor.

[0032] Here, the seat moves in the direction of the maximum force measured by the force sensor in the corresponding force flow. In particular, the seat is adjusted under control so that the greater the force measured in the corresponding force flow, the faster the associated drive unit (adjustment motor) adjusts the seat.

[0033] The control unit is also designed such that, alternatively or additionally, various adjustment modes can be activated for adjusting the seat.

[0034] For example, the control unit comprises a floating mode which is configured to cause the seat, in particular the seat shell, to follow the body movements of a person sitting in the seat, in particular in the seat shell, when activated. To this end, the control unit controls the one or more drive units as a function of the instantaneous force signals of the one or more force sensors and thus continuously adjusts the attitude and / or position of the seat relative to the base element and / or the seat base as a function of the body movements - tilting forwards or backwards or to the sides, and / or rotating the seat about a vertical axis - and synchronously with the body.

[0035] Furthermore, the control unit may comprise an adjustment mode which, when activated, is configured to cause the seat, e.g. the seat shell, to follow the body movements of a person sitting in the seat, e.g. the seat shell, into a desired seat position, wherein the seat, in particular the seat shell, is locked in the desired seat position.

[0036] Furthermore, the control unit can include a driving comfort mode (also called active floating mode), which is configured such that, when activated, an adjustment of the seat, for example the seat shell, takes place as a function of instantaneous driving movements of the vehicle, such as braking, turning or acceleration. For example, when the vehicle drives through a corner, the seat, for example the seat shell, is tilted accordingly to the side, in particular accordingly into the corner. Furthermore, depending on a possible detected collision, the seat can be set or maintained in a seat position that is safe for a person sitting in the seat, for example in the seat shell. Furthermore, in the event of correspondingly strong forces generated by a collision device, the seat can be actively float-adjusted to counteract the forces. For this purpose, the control unit is additionally connected to other sensors, in particular acceleration, braking, speed and / or collision sensors and / or other control units in the vehicle for signaling purposes.

[0037] One aspect provides that the seat can be tilted relative to the base element at least about a transverse axis by an adjustment mechanism, in particular forwardly (e.g. -8°) or backwardly (e.g. +15°), and rotated about a vertical axis, in particular relative to the longitudinal axis of the vehicle, outwardly 45° or inwardly 15°.

[0038] In a possible embodiment, the seat can be tilted in longitudinal flight relative to the base element about a transverse axis in a range between -8° (forward) and +15° (rearward) relative to a neutral position, which neutral position corresponds, for example, to a seat or design position of +25°; and / or tilted or rolled in a transverse direction about the longitudinal axis in a range between 0° and 5°, and / or rotated or pivoted about a vertical axis of a floating seat by a maximum of 45°, in particular outwardly by 45° or inwardly by 15° relative to the longitudinal axis of the vehicle.

[0039] For example, in a design or seating position, the seat adopts a posture in which the seat is oriented toward the front in the longitudinal direction and therefore in the travel / viewing direction. This position is referred to as the 0° position relative to the vertical axis (Z axis) and the longitudinal axis (X axis). In this design or seating position, in order to increase the seat comfort, the seat can be tilted backwards about a transverse axis (Y axis), for example +25°. The seat can be tilted forwards by an adjustment mechanism, for example about a transverse axis, up to -8° to improve entry or exit or backwards by up to 15° for a reclining seat position. The seat can be tilted up to 120° about the transverse axis. Relative to the design or seating position, the seat shell can be rotated about the vertical axis, in particular by a maximum of 280°, in particular from -90° to +190°, in particular 45° outwards or 15° inwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The exemplary embodiments of the present invention are described below with reference to the accompanying drawings. The accompanying drawings show:

[0041] Figure 1 Schematically shows a seat assembly with an adjustable seat, an adjustment mechanism and a control unit, which is coupled to a drive unit for adjusting the seat,

[0042] Figure 2 A seat assembly with an adjustable seat, in particular a floating seat, is schematically shown in a perspective view.

[0043] Figure 3 The adjustment mechanism for the seat is schematically shown in a plan view from above onto the seat surface of the adjustable seat,

[0044] Figure 4 The ground plane diagram below schematically shows Figure 3 The seat adjustment mechanism in

[0045] Figure 5 The cross-sectional view schematically shows Figure 3 or Figure 4 The regulating mechanism in

[0046] Figures 6 to 8 The adjustment mechanism in the region of the force sensor is schematically shown in various views,

[0047] Fig. 9 A seat with a freely adjustable seat shell is schematically shown in a perspective view,

[0048] Figures 10 to 12 The adjustment mechanism is schematically shown in a perspective view,

[0049] Fig.13is a schematic diagram of another embodiment of a seat having a freely adjustable seat shell with a self-locking drive unit,

[0050] Fig.14 The schematic diagram of overload protection in no-load state is shown.

[0051] Fig.15 shows a schematic diagram of overload protection under load state,

[0052] Fig.16 A perspective view showing another embodiment of an adjustment mechanism with a coupled drive unit, and

[0053] Fig.17 An embodiment of the coupling of a control unit, a force sensor and a drive unit is schematically shown. DETAILED DESCRIPTION

[0054] In all the figures, parts that correspond to one another are provided with the same reference numerals.

[0055] Figure 1 A seat 1, in particular a vehicle seat, is schematically shown. The seat 1 is in particular arranged in a vehicle and is attached to the vehicle floor in a manner not shown in detail. The seat 2 is constructed as a movable, in particular freely floating and adjustable seat 2 (also called a floating seat). The seat 2 can be constructed as a seat shell as explained and described in more detail below. Alternatively, the seat 2 can be formed from multiple parts in a conventional manner using a seat part and a backrest (not shown in detail). The adjustment of the seat 2 using the seat shell as an example below is correspondingly applicable to the adjustment of a multi-piece seat.

[0056] As described below, the seat 2 of the seat assembly 1 can be moved in various modes. To this end, the seat assembly 1 comprises a base element 3 on which the seat 2 is arranged so as to be adjustable relative to the base element 3 and / or the seat base 9. In order to adjust the seat 2, the seat assembly 1 comprises at least one adjustment unit 4 and a drive unit 5.

[0057] The seat 2 is designed as a seat shell having a backrest area 2 . 1 and a seat surface area 2 . 2 .

[0058] In order to explain the seat adjustment more clearly using the adjustment of the seat shell as an example, the seat shell will be referred to below as “seat shell 2 ”.

[0059] The seat shell 2 can be adjusted in at least two of several rotational degrees of freedom R1 to R3 relative to the base element 3 by means of the adjustment unit 4; in particular, it is rotatable, tiltable and / or pivotable. The first rotational degree of freedom R1 allows the seat shell 2 to be adjusted about a transverse axis Y, the second rotational degree of freedom R2 allows the seat shell 2 to be adjusted about a longitudinal axis X, and the third rotational degree of freedom R3 allows adjustment about a vertical axis Z.

[0060] The adjustment unit 4 may comprise at least one separate adjustment unit 4.1, 4.2 for each rotational degree of freedom R1, R2 (in Figure 1 and 2 to 6, 10 to 11) for adjusting the seat shell 2.

[0061] The respective adjustment unit 4, 4.1, 4.2 is coupled to at least one associated drive unit 5, 5.1, 5.2 for moving, in particular free-floating movement or adjustment, the seat shell 2. In order to achieve a controlled movement, in particular adjustment, of the seat shell 2 in at least one rotational degree of freedom R1, R2, one or more respective drive units 5, 5.1, 5.2 can be controlled by a control unit 6.

[0062] Furthermore, at least one force sensor 7 , 7 . 1 , 7 . 2 is arranged in the force flow F between the at least one drive unit 5 , 5 . 1 , 5 . 2 and the respective regulating unit 4 , 4 . 1 , 4 . 2 and is connected to the control unit 6 for signaling and / or control purposes.

[0063] Furthermore, the seat assembly 1 comprises an activation unit 10 for activating an adjustment mode for unlocking and adjusting the seat shell 2. The activation unit 10 is also coupled to the control unit 6 for signaling and / or control purposes.

[0064] A seat assembly 1 having a seat shell 2 constructed in this way, having drive units 5, 5.1 and 5.2 and adjustment units 4, 4.1, 4.2 controlled by force sensors 7, 7.1, 7.2, allows various movements of the seat shell 2, in particular comfortable and, for example, free-floating movements. In particular, a seat assembly 1 having such a seat 2 can be adjusted under control according to the body movements of a person sitting in the seat shell 2. Thus, the seat 2, in particular the seat shell 2, can automatically adopt a desired position using free movement. By means of such a direct force-controlled adjustment mechanism having one or more adjustment units 4, 4.1, 4.2, the seat shell 2 can be adjusted or moved in the manner of a free-floating seat shell 2, in particular it can be tilted forward or backward about the transverse axis Y and to the side about the longitudinal axis X, and rotated about the vertical axis Z.

[0065] Here, the corresponding drive units 5, 5.1 and / or 5.2 are constructed to lock the base element 3 and the seat shell 2 in a self-locking manner, wherein the locking can be released by a force F(I) introduced into the adjustment unit 4, 4.1 and / or 4.2 via the seat shell 2 by an occupant sitting in the seat shell 2 and also by a force F(5) introduced into the adjustment unit 4, 4.1 and / or 4.2 by one of the drive units 5, 5.1 and / or 5.2.

[0066] Figure 2 A movable, in particular adjustable seat 2 is schematically shown in a perspective view. The seat 2 is designed as a floating seat or a free-floating or freely movable seat shell 2 .

[0067] Here, the seat shell 2 can be formed as a single piece or multiple pieces from a backrest area 2.1 and a seat surface area 2.2. Alternatively, the seat shell 2 can be formed from a separate backrest area 2.1 and a seat surface area 2.2 that is adjustably, in particular tiltably (not shown in detail) arranged on the separate backrest area. The seat shell 2 comprises a load-bearing portion 2.3, in particular a hard foam shell or a composite shell, in particular made of fiber-reinforced plastic. In addition, the seat shell 2 can be provided with a cushioning element (not shown in detail) arranged thereon, in particular a foam cushion with or without a covering.

[0068] The one-piece seat shell 2 is movable relative to the base element 3. As adjustment mechanisms, a plurality of adjustment units 4 to 4.2 are provided between the seat shell 2 and the base element 3.

[0069] In particular, the adjustment mechanism is configured to perform a combined adjustment movement of the seat shell 2 relative to the base element 3. For example, the adjustment unit 4, 4.1, 4.2 is configured to perform an arch, a circular and / or a linear adjustment. In another embodiment, the adjustment unit 4, 4.1, 4.2 is configured as a spindle drive and / or a track adjuster, in particular a ring adjuster and / or a linear longitudinal and / or lateral adjuster. For this purpose, the corresponding adjustment unit 4, 4.1, 4.2 may include a hinge mounting, a sliding bearing, a track mounting or a roller bearing. Therefore, the seat shell 2 is mounted on the base element 3 so as to be movable, in particular slidable, in particular tiltable, rotatable and / or pivotable. With the help of the adjustment unit 4, 4.1, 4.2, the seat shell 2 can be moved relative to the base element 3 on at least two or all of the three rotational degrees of freedom R1, R2 and / or R3, in particular tiltable, rotatable and / or pivotable.

[0070] For example, in the design or seat position P1, the seat shell 2 adopts a posture in which the seat shell 2 is oriented forward in the longitudinal direction x and therefore in the travel / visual direction. This seat position P1 is referred to as the 0° position relative to the vertical axis Z and the longitudinal axis X. In this seat position P1, the seat shell 2 is tilted backwards by 25° around the transverse axis Y to improve the sitting comfort. Here, the adjustment mechanism with the adjustment unit 4, 4.1, 4.2 is constructed so that, relative to the design or seat position P1, the seat shell 2 can be tilted forward by up to -10° or -8° relative to 25° around the transverse axis Y (rotational freedom R1) and backward by up to +15°, and / or rotated around the vertical axis Z (rotational freedom R2) in particular by a maximum of 280, in particular rotated outwards by +45° and rotated inwards by -15°.

[0071] In particular, for each rotational degree of freedom R1, R2, the adjustment mechanism comprises an associated adjustment unit 4.1 and 4.2. The adjustment unit 4.1 for tilting the seat shell 2 forwards or backwards around the transverse axis Y and tilting sideways around the longitudinal axis X is constructed, for example, as a pivot joint, a sliding mechanism or a cable mechanism 41.1 or as a track adjustment mechanism with roller bearings. For the rotational movement of the seat shell 2 around the vertical axis Z, the adjustment unit 4.2 is constructed, for example, as an annular track mechanism with roller bearings.

[0072] The adjustment units 4.1, 4.2 are coupled to each other for movement purposes. Furthermore, the adjustment units 4.1, 4.2 are arranged between the base element 3 and the seat shell 2, in particular below the seat shell 2, in particular on the lower side of the seat surface area 2.2.

[0073] Furthermore, the base element 3 can be arranged on a length adjustment unit 8, in particular a pair of rails, for adjusting the length of the seat 1 relative to a seat base 9, for example a vehicle floor. The base element 3 is, for example, a seat carrier and comprises a plurality of crossbar elements 3.1. Alternatively, the base element 3 can also be configured as a carrier plate 3.2 (for example, in Figure 5 , 9 , as shown in 16).

[0074] For a compact arrangement, the drive units 5 . 1 , 5 . 2 and the control unit 6 can be assigned to the base element 3 , mounted thereon and attached thereto. The base element 3 is in turn mounted on the seat base 9 .

[0075] The seat assembly 1 is thus constructed such that the position of the seat shell 2 relative to the base element 3 and / or the seat base 9 can be set, for example, in the longitudinal direction x in the translational degrees of freedom T1, T2 by means of the length adjustment unit 8 and / or in the rotational degrees of freedom R1 to R3 by means of the adjustment units 4.1, 4.2. For this purpose, the adjustment mechanism is provided with the adjustment units 4.1, 4.2. The free movement, in particular setting or adjustment, of the position of the seat shell 2 in more than two degrees of freedom creates the impression of a floating or sliding seat shell 2, which follows the movement of the person in the seat shell 2 due to the shifting of the center of gravity of the person sitting in the seat shell 2.

[0076] Figure 3 A partially transparent plan view from above of a seat surface area 2.2 of the movable seat 1 schematically shows an adjustment mechanism having an adjustment unit 4.1 (also called Y adjustment unit 4.1) for a forward or backward tilting movement of the seat shell 2 about a transverse axis Y and an adjustment unit 4.2 (also called Z adjustment unit 4.2) for a rotational movement of the seat shell 2 about a vertical axis Z.

[0077] The Y-adjustment unit 4.1 is designed, for example, as a sliding mechanism, in particular a track-roller mechanism. The Y-adjustment unit 4.1 comprises at least three tracks 4.1.1 and associated roller bearings 4.1.2 with rollers, by means of which the seat shell 2 is slidably mounted relative to the base element 3. The Z-adjustment unit 4.2 is designed, for example, as an annular track adjustment mechanism 4.2.1 with annular tracks.

[0078] Figure 4 The plan view from below schematically shows Figure 3 The adjustment mechanism 4 of the middle seat 1 .

[0079] In order to allow the seat shell 2 to move forward or backward tilting around the transverse axis Y, the adjustment unit 4.1 includes at least two curved rails 4.1.1 separated from each other with rollers 4.1.2 for sliding or rolling movement of the seat shell 2 on the rails 4.1.1. The corresponding rails 4.1.1 also include end stops 4.1.3 protruding in the longitudinal direction x in the direction of the seat shell 2 for limiting the forward and backward tilting movement of the seat shell 2 around the transverse axis Y. The adjustment unit 4.1 includes a bearing element 4.1.4 for fixing the rails 4.1.1, in particular a bearing plate 3.2.

[0080] Furthermore, the adjustment unit 4.1 may comprise a guide rail 4.1.5 with rollers 4.1.2. The guide rail 4.1.5 and the rollers 4.1.2 ensure that there is no play in the Y direction (lateral movement) or in the Z direction (rotation or rotation about the vertical axis Z). The guide rail 4.1.5 may be formed straight or curved. Alternatively, the guide rail 4.1.5 may also be functionally implemented in the length adjustment unit 8 (not shown in detail).

[0081] For rotational movement of the seat shell 2 about the vertical axis Z, the adjustment unit 4.2 comprises an annular rail 4.2.1 which is arranged and fixed in a passage opening 4.1.6 of the carrier element 4.1.4.

[0082] The annular track 4.2.1 is constructed as a horizontal annular track pair, comprising an upper annular track 4.2.2 and a lower annular track 4.2.3. The upper annular track 4.2.2 is fixedly held in the bearing element 4.1.4. The lower annular track 4.2.3 is fixedly held on the base element 3. In addition to the transverse bearing element 3.1, the base element 3 also comprises a bearing plate 3.2 for fixing the lower annular track 4.2.3.

[0083] Figure 5 The cross-sectional view schematically shows the Figure 3 or Figure 4 The adjusting mechanism of the adjusting units 4.1 and 4.2.

[0084] The carrier plate 3.2 and the carrier element 4.1.4 each have a central passage opening 3.2.1 or 4.1.6, which overlap one another. The annular track 4.2.2, 4.2.3 is arranged relative to the carrier plate 3.2 and the carrier element 4.1.4 so that the inner annular opening 4.2.4 and the passage openings 3.2.1, 4.1.6 of the lower carrier plate 3.2 and the upper carrier element 4.1.4 overlap one another one another.

[0085] The force-controlled movement of the seat shell 2 is described below using the example of an adjustment unit 4 . 1 for a tilting movement of the seat shell 2 about a transverse axis Y.

[0086] For this purpose, the force sensor 7.1 is located in the force flow F between the seat shell 2 and the seat base 9. The force sensor 7.1 for the adjusting unit 4.1 is located in particular directly in the force flow F between the adjusting unit 4.1 and the associated drive unit 5.1.

[0087] The force sensor 7.1 is configured, for example, as a tension and / or pressure sensor for detecting compressive and / or tensile loads. For example, the force sensor 7.1 is a strain gauge or other suitable component for detecting deformation, in particular elongation or compression. The force sensor 7.1 is connected to the control unit 6 for signaling and control purposes.

[0088] In an exemplary embodiment, the drive unit 5.1 is constructed as a Bowden cable mechanism 5.1.5. The drive unit 5.1 comprises, for example, a motor 5.1.1 and a Bowden cable 5.1.2, as well as a force transmission element 5.1.3 for transmitting the adjustment force of the motor 5.1.1 into an adjustment movement of the seat shell 2 along the adjustment unit 4.1, in particular the track 4.1.1 and the guide track 4.1.5. For this purpose, the Bowden cable 5.1.2 is connected at the end to the seat shell 2 and the output side of the motor 5.1.1.

[0089] Instead of the Bowden cable mechanism 5.1.5, another suitable mechanism can also be used. Preferably, a gear motor unit (not shown in detail) with gears is used.

[0090] Figures 6 to 8 The various diagrams schematically show an adjustment mechanism with adjustment units 4.1, 4.2 in the region of force sensor 7.1. The force transmission element 5.1.3 is designed, for example, as a deflection roller 41.3 for a Bowden cable 5.1.2.

[0091] Figure 8 The arrangement of the force sensor 7 . 1 directly in the force flow F between the control unit 4 . 1 and the drive unit 5 . 1 is shown.

[0092] Fig. 9 A seat assembly 1 with a freely adjustable seat shell 2 is schematically shown in a perspective view.

[0093] Figures 10 to 12 The adjustment mechanism with the adjustment units 4 . 1 and 4 . 2 is shown schematically in a perspective view without the seat shell 2 .

[0094] Fig.11 and 12 A drive unit 5.2 of an adjustment unit 4.2 for rotating the seat shell 2 about a vertical axis Z is shown. In the exemplary embodiment, the drive unit 5.2 is shown as, for example, a Bowden cable mechanism 5.1.5. The drive unit is preferably configured as a gear motor unit with gears. An associated force sensor 7.2 is arranged in a similar manner to the adjustment unit 4.1 between the seat shell 2 and the seat base 9, in particular in the force flow F between the drive unit 5.2 and the adjustment unit 4.2.

[0095] Fig.13 A schematic diagram of another embodiment of a seat component 100 is shown, which has a freely adjustable seat shell 2 with a self-locking drive unit 5 .

[0096] The seat component 100 is designed in particular as a floating seat. Similar to the seat component 1 , the seat shell 2 comprises a seat surface area 2 . 2 and a backrest area 2 . 1 as well as a base element 3 , on which the seat shell 2 is adjustably arranged.

[0097] Furthermore, the seat component 100 comprises an adjustment unit 40 for adjusting the seat shell 2 relative to the base element 3 . Furthermore, the seat component 100 comprises at least one self-locking drive unit 5 .

[0098] The drive unit 5 is constructed to lock the base element 3 and the seat shell 2 in a self-locking manner, wherein the locking can be released by a force F(I) introduced into the adjustment unit 40 via the seat shell 2 by an occupant sitting in the seat shell 2 and also by a force F(5) introduced into the adjustment unit 40 via the drive unit 5.

[0099] The seat shell 2 can thus be adjusted by autonomous adjustment, by a shift in the center of gravity of a person sitting in the seat shell 2 and / or by motorized adjustment of the drive unit 5 based on a set or activated adjustment mode.

[0100] The seat shell 2 is constructed as a single piece or can, for example, comprise a seat surface and a backrest which are arranged fixedly relative to one another. The seat adjustment is achieved in particular by body movements of an occupant seated in the seat shell 2. In contrast to previously known seat adjustment devices, the adjustment about one or more adjustment axes is not achieved by manually operated input facilities but only by a shift in the center of gravity or center of support of the occupant against the seat shell 2, in particular the seat surface of the seat shell 2.

[0101] Furthermore, the seat shell 2 can also be adjusted without an occupant. For example, the seat shell 2 can automatically return to a "normal" starting position or seat position P1, or to a position that is easier to enter / leave, in particular a tilted position (not shown in detail). This adjustment can be achieved not only when the seat or seat shell 2 is "idle", but also if an occupant is sitting in the seat shell 2. For example, a stored position, such as the seat position P1, can be automatically restored.

[0102] The seat assembly 100 includes a mechanical motorized adjustment device that utilizes a self-locking principle, such that a separate locking device is not required.

[0103] For this purpose, at least one force sensor 7 is arranged in the force flow F between the adjustment mechanism 40 and the seat base 9 .

[0104] The force sensor 7 is arranged and configured to measure the force F(I) or F(5) acting on the adjustment unit 40. For this purpose, the force sensor 7 is coupled to the drive unit 5 so that the self-locking of the drive unit 5 is released or at least reduced when the adjustment mode is activated and the force F(I) is applied to the adjustment unit 40, for example due to a movement of the occupant in the seat shell 2. For this purpose, for example, the occupant has activated the adjustment mode of the seat assembly 100 by means of the activation unit 10, so that due to a shift in the center of gravity of the occupant or a corresponding support in the seat shell 2, the seat shell 2 automatically moves accordingly.

[0105] The control unit 6 is here coupled to the drive unit 5, the force sensor 7 and / or the activation unit 10. For example, the control unit 6 is coupled to the force sensor 7, the drive unit 5 and / or the activation unit 10 for signaling and / or control purposes.

[0106] During operation, adjustment commands of the occupant are determined, for example, by means of an input unit 11 (e.g. a switch or a voice signal) and / or by means of the activation unit 10. By inputting an adjustment command or an adjustment mode via the input unit 11 (e.g. by means of a voice command or by activating a switch), in particular one of a plurality of adjustment modes can be activated. Alternatively or additionally, the seat component 100 can comprise a plurality of contact sensors 12 (which are also used, for example, for detecting seat occupancy) as the activation unit 10 in order to activate an adjustment mode. Alternatively or additionally, the adjustment command can also be determined using fewer sensors, which detect a force component in the actuation direction of the drive unit 5 close to the drive.

[0107] In a possible embodiment, the floating mode is activated, wherein the control unit 6 is configured to move the seat shell 2 in the activated floating mode so that it follows the body movement of the occupant seated in the seat shell 2. Here, the seat shell 2 is not locked in the assumed seat position P1.

[0108] Alternatively, an adjustment mode can be activated, wherein the control unit 6 is constructed to move the seat shell 2 in the activated adjustment mode so that the seat shell follows the body movement of an occupant sitting in the seat shell 2 to reach the desired seat position P1, and wherein the seat shell 2 is locked in the desired seat position P1, for example by self-locking of the drive unit 5.

[0109] In a further alternative, a driving comfort mode may be activated, wherein the control unit 6 is designed to adjust the seat shell 2 in the activated driving comfort mode as a function of the instantaneous driving movement of the vehicle.

[0110] Fig.13 An adjustment unit 40 is shown, which is configured as a cable mechanism 41.1. For example, the cable mechanism 41.1 is configured as an arcuate cable arrangement having a circumferential cable 41.2.

[0111] The drive unit 5 comprises at least one gear motor unit. The gear motor unit is configured as a self-locking worm gear 5.1.4 with a motor 5.1.1. The spindle of the worm gear 5.1.4 is connected to the cable mechanism 41.1 via a Bowden cable mechanism 5.1.5. The drive unit 5 activates the Bowden cable mechanism 5.1.5, which actuates the cable 41.2, which acts on the carrier 13 connected to the seat shell 2 for movement purposes.

[0112] For movement purposes, the cable 41.2 is coupled to a self-locking worm gear 5.1.4. For example, the cable 41.2 is held by two deflection rollers 41.3, which are driven by a gear motor unit via the Bowden cable 5.1.2 of a Bowden cable mechanism 5.1.5. Furthermore, the cable 41.2 is coupled to a carrier 13, which is attached to the seat shell 2.

[0113] If the carrier 13 substantially follows the arc or arc segment of the seat shell 2 and the cable 41.2 rests on the seat side on the arc segment, the adjustment unit 40 can be designed to be very rigid, since there is almost no need to adjust the length of the cable 41.2. The seat shell 2 is locked by the self-locking of the cable 41.2 and the worm gear 5.1.4. To adjust the seat shell 2, it can be adjusted by the motor by activating the motor 5.1.1.

[0114] Furthermore, the seat shell 2, in particular its associated adjustment unit 40, and the base element 3 and / or seat base 9 and the force sensor 7 arranged therebetween are actively connected so that a force F(I) introduced into the seat shell 2 by an occupant sitting in the seat shell 2 acts on the force sensor 7 as a resultant force.

[0115] In order to measure the force F(I) introduced by the occupant into the seat shell 2, the adjustment unit 40 with the cable mechanism 14.1, the deflection roller 41.3 and the carrier 13, as well as the drive unit 5, rests against a seat base 9, for example a vehicle floor support, via a force sensor 7. By arranging the force sensor 7 between the seat base 9 and the seat shell 2, which has components such as the adjustment unit 40, the deflection roller 41.3, the carrier 13 and the drive unit 5 mounted on a structural support such as a crossbar element 3.1 or a carrier plate 3.2, it is ensured that the pretension of the cable 41.2 required to ensure the absence of play is not superimposed on the force measurement signal, but only the resultant force from the adjustment command acts on the force sensor 7.

[0116] For this purpose, the base element 3 as a carrier with the adjustment unit 40 or the drive unit 5 is mounted or arranged on the seat base 9, for example via support points 14 (such as Fig.16In order to ensure this single force transmission point, the adjustment unit 40 is mounted on the support point 14 so that the force component in the measuring direction is affected as little as possible.

[0117] For this purpose, a guide for the cable 41.2 can be provided. The guidance of the cable 41.2 via the deflection roller 41.3 and the movement of the cable 41.2 via the Bowden cable 5.1.2 further allow the drive unit 5 to be distributed to the base element 3, so that the seat shell 2 carries less weight. This also simplifies the power supply to the motor 5.1.1.

[0118] In order to rotate the seat shell 2 of the seat 10 about the vertical axis Z, a separate adjustment device may be provided, for example Figures 1 to 6 Another alternative adjustment device for adjustment around the vertical axis Z can be, for example, another drive unit 5, 5.1, 5.2 formed by a motor 5.1.1 and a worm gear, which is arranged directly at the pivot point of the seat shell 2 without a cable mechanism 41.1 or is arranged along an arc section of the seat shell 2 with the pivot point as the center point and is connected to the seat shell 2, wherein another force sensor 7 is arranged between the adjustment device and the base element 3 as a transmission element for tangential forces and measures the tangential forces (not shown in detail).

[0119] Furthermore, the force threshold value can be parameterized and stored in the control unit 6 and taken into account when activating the corresponding regulating mechanism 4 or 40. Since the force threshold value can be parameterized, the time behavior of the regulating mechanism is also determined with reference to Figure 4 Or 40, as well as the transfer factors for force application and adjustment speed, the adjustment behavior of the seat 1 or 10 can be adapted and modified. In particular, further sensors for position determination can allow setting of position-dependent adjustment parameters.

[0120] Furthermore, a plurality of end stops 16 may be provided for limiting the adjustment movement of the seat shell 2 for the seat 1 and the seat 100 .

[0121] In addition, a entrapment protection device based on a seat environment sensor may be provided for the corresponding seat 1 or 10 .

[0122] Furthermore, environmental influences such as vehicle acceleration or deceleration can be taken into account, in particular compensated. To this end, the control unit 6 determines vehicle parameters such as vehicle acceleration or deceleration and generates suitable control signals for the respective drive unit 5, 5.1 and / or 5.2 accordingly.

[0123] In addition, the seat shell 2 may be provided with an overload protection device 15 to absorb overload forces, such as Fig.14 and 15 shown.

[0124] Fig.14FIG. 1 is a schematic diagram showing the overload protection device 15 in a no-load state.

[0125] Fig.15 FIG. 1 is a schematic diagram showing the overload protector 15 in a load state.

[0126] The overload protection device 15 prevents large forces (eg caused by an accident) from having to be dissipated via the cable 41 . 2 and the self-locking drive unit 5 or 5 . 1 , 5 . 2 .

[0127] Such an overload protection device 15 can be formed, for example, by at least one T-bar 15.1, the foot point of which is pivotably mounted on the seat shell 2 via, in particular, a flexible hinge 15.2 (e.g. a fabric or spring hinge). Alternatively, two T-bars 15.1 connected together can also be provided (not shown in detail).

[0128] A cable 41.2, in particular a steel cable, is attached above the crossbar of the T-bar 15.1. A protective structure 15.3 corresponding to the bar 15.1, in particular a brake or profile structure, such as an inverse sawtooth structure, is provided below the crossbar of the bar 15.1.

[0129] exist Fig.15 In the unloaded state shown, the cross member is placed above the protective structure 15 . 3 , so that the seat shell 2 can be adjusted.

[0130] If too great a force is introduced, the crossbar of the lever 15 . 1 engages with the protective structure 15 . 3 , so that adjustment of the seat shell 2 is impeded.

[0131] Furthermore, end stops 16 may be provided for limiting the adjustment movement of the seat shell 2 .

[0132] Fig.16 A perspective view of an adjustment mechanism 40 is shown with an adjustment unit 41 assigned to the base element 3 and mounted via the support points 14 and with a coupled drive unit 5 .

[0133] Fig.17 An embodiment of the connection of the control unit 6 , the force sensor 7 and the drive unit 5 for signaling and control purposes is schematically shown.

[0134] The signal from the force sensor 7 is amplified by a measuring amplifier 17 and supplied to the control unit 6 to generate a drive signal for the drive unit 5. The drive signal for the drive unit 5 is supplied via a bridge circuit 18, in particular an electronic H-bridge circuit 5.1.1, for activating the motor 5.1.1.

[0135] For controlling the motor 5.1.1, additionally the measurement signal can be fed back via the ammeter 19 and the motor sensor 20, in particular a Hall Effect sensor, to the control unit 6 for controlling the motor 5.1.1.

[0136] Reference numerals list

[0137] 1,100 Seat Components

[0138] 2 Seats, seat shells

[0139] 2.1 Backrest area

[0140] 2.2 Seat surface area

[0141] 2.3 Load-bearing part

[0142] 3 Base element

[0143] 3.1 Crossbar element

[0144] 3.2 Load-bearing plate

[0145] 3.2.1 Channel opening

[0146] 4,4.1,4.2,40 Adjustment unit

[0147] 4.1.1 Track

[0148] 4.1.2 Rollers

[0149] 4.1.3 End stops

[0150] 4.1.4 Load-bearing components

[0151] 4.1.5 Guide Track

[0152] 4.1.6 Channel openings

[0153] 4.2.1 Circular track

[0154] 4.2.2 Upper circular track

[0155] 4.2.3 Lower circular track

[0156] 4.2.4 Inner ring opening

[0157] 41.1 Cable mechanism

[0158] 41.2 Cables

[0159] 41.3 Deflection roller

[0160] 5 Drivers

[0161] 5.1, 5.2 Drive unit

[0162] 5.1.1 Motor

[0163] 5.1.2 Bowden cable

[0164] 5.1.3 Force transmission elements

[0165] 5.1.4 Worm gear

[0166] 5.1.5 Bowden cable mechanism

[0167] 5.2.1 Motor

[0168] 5.2.2 Bowden cable

[0169] 6 Control unit

[0170] 7.1,7.2,7 Force sensor

[0171] 8 Length adjustment unit

[0172] 9 Seat base

[0173] 10 Activation Unit

[0174] 11 Input unit

[0175] 12 Contact Sensor

[0176] 13 Load-bearing part

[0177] 14 Support Points

[0178] 15 Overload protection device

[0179] 15.1 rod

[0180] 15.2 Hinges

[0181] 15.3 Protective structures

[0182] 16 End stop

[0183] 17 Measuring amplifier

[0184] 18 Bridge Circuit

[0185] 19 Ammeter

[0186] 20 Motor sensor

[0187] F Force Flow

[0188] F(I) Force introduced by the occupant

[0189] F(5) Force introduced by the drive unit

[0190] P1 Design or seat position

[0191] T1,T2 Translational degrees of freedom

[0192] R1, R2, R3 rotational degrees of freedom

[0193] X longitudinal axis

[0194] Y Horizontal axis

[0195] Z vertical axis

[0196] x vertical direction

Claims

1. A seat assembly (1, 100), comprising: - at least one seat (2) having a seat surface area (2.2) and a backrest area (2.1), - a base element (3) on which the seat (2) is adjustably arranged, - at least one adjustment unit (4, 40, 4.1, 4.2) for adjusting the seat (2) relative to the base element (3) and / or a seat base (9), and - at least one drive unit (5, 5.1, 5.2), wherein the drive unit (5, 5.1, 5.2) is designed to lock the base element (3) and the seat (2) in a self-locking manner and wherein the locking can be released by a force (F(I)) introduced into the adjustment unit (4, 40, 4.1, 4.2) by an occupant sitting in the seat (2) via the seat (2) and also by a force (F(5)) introduced into the adjustment unit (4.1, 4.2, 41) by the drive unit (5, 5.1, 5.2).

2. The seat assembly (1, 100) according to claim 1, wherein: At least one force sensor (7, 7.1, 7.2) is arranged in a force flow (F) between the seat (2) and the seat base (9) and / or the base element (3).

3. The seat assembly (1, 100) according to claim 2, wherein: A control unit (6) is provided, which is coupled to the drive unit (5, 5.1, 5.2), the force sensor (7, 7.1, 7.2) and / or the activation unit (10).

4. The seat assembly (1, 100) according to claim 3, wherein: The activation unit (10) is designed as an input unit (11) and / or a contact sensor (12) for activating a control mode.

5. The seat assembly (1, 100) according to claim 3 or 4, wherein: The control unit (6) is configured to move the seat (2) in an activated floating mode so that it follows the body movement of an occupant seated in the seat (2).

6. The seat assembly (1, 100) according to claim 3 or 4, wherein: The control unit (6) is configured to move the seat (2) in an activated adjustment mode so that the seat follows the body movement of an occupant sitting in the seat (2) to a desired seat position (P1), and wherein the seat (2) is locked in the desired seat position (P1).

7. The seat assembly (1, 100) according to claim 3 or 4, wherein: The control unit (6) is designed to adjust the seat (2) in an activated driving comfort mode as a function of the instantaneous driving movement of the vehicle.

8. The seat assembly (1, 100) according to any one of claims 1 to 4, wherein: The adjustment unit (4.1, 4.2, 41) is designed to perform an adjustment movement of the seat (2) relative to the base element (3) and / or the seat base (9).

9. The seat assembly (1, 100) according to claim 8, wherein: The drive unit (5, 5.1, 5.2) comprises at least one gear motor unit coupled to the adjustment unit (4).

10. The seat assembly (1, 100) according to claim 8, wherein: The drive unit (5, 5.1, 5.2) actuates the Bowden cable mechanism ( 5.1.5) or a spindle, the Bowden cable mechanism or spindle actuates the cable (41.2) of the cable mechanism (41.1) or the track of the adjustment unit, the cable or the track acting on a load-bearing part (13) connected to the seat (2) for movement purposes.

11. The seat assembly (1, 100) according to any one of claims 2 to 4, wherein: The seat (2) and the base element (3) and the force sensor (7, 7.1, 7.2) arranged therebetween are actively coupled such that the force (F(I)) introduced by an occupant sitting in the seat (2) acts on the force sensor (7, 7.1, 7.2) as a resultant force.

12. The seat assembly (1, 100) according to any one of claims 1 to 4, wherein: The adjustment unit (4, 4.1, 4.2, 40) is mounted on the seat base (9) via a support point (14).

13. The seat assembly (1, 100) according to any one of claims 1 to 4, wherein: A number of end stops (4.1.3) are provided to limit the adjustment movement of the seat (2).

14. The seat assembly (1, 100) according to any one of claims 1 to 4, wherein: The seat (2) is provided with an overload protection device (15) for absorbing overload force, and / or a entrapment protection device based on a seat environment sensor.

15. The seat assembly (1, 100) according to any one of claims 1 to 4, wherein: The seat (2) is designed as a seat shell.

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