DEVICE FOR ADJUSTING A SEAT POSITION

Description

[0001] The invention relates to a device for adjusting a seat position for a vehicle seat, wherein the device can be connected to at least one support element for a seat part and a seat substructure.

[0002] Such devices are intended in particular for vehicle seats in commercial vehicles such as tractors, construction machinery, forklifts, trucks, etc. Such vehicle seats, especially driver seats, in commercial vehicles must meet special requirements with regard to seat ergonomics, as the occupants or drivers generally have to spend long periods of time in them. It is desirable that the vehicle seat can be optimally adjusted for various seating positions. Furthermore, it must be taken into account that the vehicle seat is used by occupants of different sizes and must therefore be adjusted accordingly. Such a multitude of adjustment options for the vehicle seat often results in undesirable complexity of the vehicle seat.

[0003] Depending on the driver's height, the driver's seat must be adjusted along the vertical axis Z and along the longitudinal axis X to give the driver the optimal seat height and the optimal distance to the pedals. The angle of the seat section is also usually adjusted. A taller driver prefers to sit higher along the vertical axis Z and further back along the longitudinal axis X than a shorter driver. Taller drivers also prefer the seat section to be tilted backwards. With this angle, a front edge of the seat section is pivoted upwards along the vertical axis Z. Common driver seats with an upright seating position usually offer the option of adjusting the seat height. In most applications, this adjustment is achieved by moving the seat almost vertically.After adjusting the seat height, the next step is to adjust the seat inclination and, if necessary, the seat position in the longitudinal direction X. If frequent driver changes are necessary, such a procedure can be perceived as cumbersome.

[0004] A generic device for adjusting a seat position for a vehicle seat is known from EP0882619A2.

[0005] The object of the present invention is to provide a vehicle seat which solves the problems mentioned above.

[0006] The object is achieved by a device for adjusting a seat position for a vehicle seat, which device comprises at least one support element for a seat part and is connectable to a seat substructure, wherein the device comprises at least one first leg and at least one second leg, wherein the first leg is rotatable about a third axis of rotation and the second leg is rotatable about a fourth axis of rotation on the seat substructure and rotatable on the at least one support element, wherein a first angle α between the first leg and the support element is adjustable by an angle adjustment device, wherein the at least one first leg and the at least one second leg each have a lever section which are mechanically coupled and wherein the at least one first leg is arranged along a longitudinal axis behind the at least one second leg,wherein a change in the angle α causes a displacement of the at least one support element along a height axis Z and a change in an angle of inclination θ of the support element, wherein the angle of inclination θ extends between a central axis of the at least one support element and a reference axis which is substantially parallel to the longitudinal axis, wherein the change in the angle of inclination θ is caused by different lengths of the lever sections of the legs, wherein upon adjustment of the angle α, the at least one first leg rotates about the third axis of rotation and the mechanical coupling causes a rotation of the at least one second leg about the fourth axis of rotation, wherein the at least one second leg is indirectly connected to the at least one support element, wherein the at least one second leg is connected to the support element via a spacing element,wherein the spacing element is rotatable about a rotation axis relative to the at least one second leg, wherein the spacing element is rotatable about a further rotation axis relative to the support element..,

[0007] The device according to the invention enables easy adjustment of the seat height and, at the same time, the inclination of the seat surface. The seat surface is the uppermost surface of the seat section, on which the occupant sits. Some occupants find it more comfortable if the seat surface is not exactly horizontal, but slightly tilted forward. Other occupants prefer the seat surface tilted backward. From an ergonomic point of view, the seat surface should be tilted so steeply that the thighs rest lightly on the seat section without pressure. The more the thigh is supported, the better the seating pressure is distributed. This leads to noticeable relief, especially on long journeys. The device according to the invention therefore enables simultaneous adjustment of two ergonomically relevant seating parameters, namely the seat height and the inclination of the seat surface. Furthermore, the device is structurally extremely simple and therefore cost-effective to manufacture.

[0008] The device, or rather the vehicle seat, extends along a vertical axis Z. Displacement along the vertical axis Z can be downward, i.e., toward the vehicle floor, or upward. The device, or rather the vehicle seat, also extends along a longitudinal axis X. Displacement along the longitudinal axis X can be forward, i.e., toward the pedals, or backward. Finally, the device, or rather the vehicle seat, extends along a width axis Y.

[0009] The term "substantially" used below should be interpreted to include even minor tolerance deviations. Thus, the deviation may be an angle of preferably less than 10°, more preferably less than 7.5°, and even more preferably less than 5°.

[0010] According to a preferred embodiment, the mechanical coupling comprises a connecting element which connects the lever sections of the legs. According to the invention, the change in the angle of inclination θ is caused by a different length of the lever sections of the at least one first leg and the at least one second leg. Alternatively, the change in the angle of inclination θ is caused by the different lengths of the lever sections of the at least one first leg and the at least one second leg and is caused by a modification of the length of the connecting element. The inclination of the seat part is therefore advantageously made possible by the mechanical coupling of the two legs and the different length of the lever section of the two legs. The lever section of the at least one second leg is preferably longer than the lever section of the at least one first leg.Furthermore, a connecting element can be provided which can be modified in its length. The advantageous modification of the distance between the lever sections can enable a further change in the angle of inclination θ. If both lever sections of the legs have the same length, the angle of inclination θ remains unchanged by changing the angle α. The seat part would therefore preferably be displaced horizontally along the height axis Z. In such a case, the change in the angle of inclination θ occurs through an advantageous modification of the length of the connecting element. In this case, the change in the angle of inclination θ is preferably proportional to the change in the length of the connecting element.

[0011] According to the invention, the angle of inclination θ extends between a central axis of the at least one support element and a reference axis which is substantially parallel to a longitudinal axis X of the device. Accordingly, the at least one support element is arranged in a first plane which includes the central axis. The seating surface of the seat part is advantageously arranged substantially parallel to the first plane. The reference axis is included in a reference plane which is spanned by the longitudinal axis X and the width axis Y. Preferably, the reference plane is substantially parallel to a body floor. The seat part preferably has a rear region which rests against an advantageous backrest. Opposite along the longitudinal axis X, the seat part has a front region which, in one embodiment as a driver's seat, is preferably oriented towards the pedals.Accordingly, a front and a rear region of the support element can also be defined. With a horizontal alignment of the at least one support element or the seat surface, the angle of inclination θ is substantially 0°. Advantageously, with an angle of inclination θ greater than 0°, a front region of the support element or a front region of the seat part is pivoted upwards along the height direction Z. Preferably, with an angle of inclination θ less than 0°, a front region of the support element or a front region of the seat part is pivoted downwards along the height direction Z. With an advantageous inclination towards the rear, the angle θ would therefore assume positive values. With an advantageous inclination towards the front, the angle of inclination θ would therefore assume negative values.The inclination angle θ can preferably be set in a range between -60° and +60°, preferably in a range between -45° and +45°, more preferably in a range between -30° and +30°.

[0012] According to a further advantageous embodiment, a change in the angle α causes a displacement of the at least one support element along a height axis Z and simultaneously along a longitudinal axis X, as well as a change in an angle of inclination θ of the support element. Accordingly, three ergonomically relevant seat parameters are advantageously changed by a change in the angle α. These are the seat height, the seat position in the longitudinal direction X, or the distance to the pedals and the steering wheel, and the inclination of the seat part. Preferably, a change in the angle α, which causes a downward displacement of the at least one support element along the height axis Z, simultaneously causes a forward displacement of the at least one support element along the longitudinal axis X and a change in the angle of inclination θ in a negative direction.A change in the angle α, which causes an upward displacement of the at least one support element along the height axis Z, advantageously also causes a rearward displacement of the at least one support element along the longitudinal axis X and a change in the angle of inclination θ in a positive direction. When the angle of inclination θ changes in a positive direction, a positive angle value becomes larger and a negative angle value becomes smaller. This is also referred to as a change in the rearward inclination of the seat part. When the angle of inclination θ changes in a negative direction, a positive angle value becomes smaller and a negative angle value becomes larger. This is also referred to as a change in the forward inclination of the seat part.

[0013] Such synchronized adjustment of the seat positions with regard to the height of the distance to the pedals and the inclination of the seat section enables quick, ergonomic adjustment of the seating position for both short and tall riders. Short riders generally require lower seat heights and must also sit further forward along the longitudinal axis X. In contrast, tall riders must position themselves higher along the height axis Z and further back along the longitudinal axis X. This enables extremely quick and easy adjustment of the seating position. To adjust the seating position with regard to the three seating parameters, only the advantageous angle adjustment device needs to be operated. Advantageously, the angle α is held by the angle adjustment device until it is operated again. The angle adjustment device can therefore also be regarded as an angle locking device.

[0014] According to the invention, the at least one first leg is arranged along the longitudinal axis X behind the at least one second leg. It is advantageous that the at least one first leg is connected along the longitudinal axis X to the at least one second leg by means of a first longitudinal connection. Advantageously, the first longitudinal connection is realized by the at least one support element or by the seat part. Furthermore, it is advantageous that the at least one first leg and the at least one second leg are connected along the longitudinal axis X by means of a second longitudinal connection. Preferably, the second longitudinal connection is realized by the seat substructure. Preferably, the mechanical coupling comprises the first and second longitudinal connections. Advantageously, the first and longitudinal connections are rigid connections and therefore cannot be changed in their length.According to a further preferred embodiment, the at least one first leg and the at least one second leg each have a first section and the lever section, or second section. Preferably, the first section and the lever section form an angle β. Advantageously, the at least one first leg and the at least one second leg are thereby configured to be substantially L-shaped. A bending region is preferably provided between the first section and the lever section.

[0015] According to a further preferred embodiment, the at least one first leg and the at least one second leg are each mounted rotatably about a rotation axis relative to the support element. Advantageously, the at least one first leg and the at least one second leg are each mounted rotatably about a further rotation axis relative to the seat substructure. The rotation axis with respect to the rotation relative to the support element is preferably arranged in an upper end region of the first section. The rotation axis with respect to the rotation relative to the seat substructure is preferably arranged in the bending region.

[0016] Preferably, a third longitudinal connection along the longitudinal axis X between the lever section of the at least one first leg and the lever section of the at least one second leg is realized by the connecting element. Advantageously, the mechanical coupling comprises the third longitudinal connection, the length of which can preferably be modified. However, it would also be conceivable for the third longitudinal connection to be a rigid connection. Preferably, the respective lever section is rotatable about an axis of rotation relative to the connecting element. Advantageously, the axis of rotation is arranged in a lower end region of the respective lever section with respect to a rotation of the at least one first or the at least one second leg relative to the connecting element.

[0017] According to the invention, the at least one second leg is indirectly connected to the at least one support element. At least the one second leg is connected to the at least one support element via a spacing element, for example a connecting rod. Two axes of rotation are therefore advantageously provided with regard to a rotation of the second leg relative to the support element. According to the invention, the spacing element is rotatable about an axis of rotation relative to the at least one second leg and about a further axis of rotation relative to the support element. These two axes of rotation are preferably arranged one above the other or spaced apart along the height axis Z. Advantageously, the spacing element or connecting rod is rotatable about an axis of rotation relative to the at least one second leg. This results in an advantageous further degree of freedom which can be used to adjust an inclination of the seat part.

[0018] According to the invention, by adjusting the angle α, the orientation of the at least one first leg is changed. Accordingly, the first leg is turned or rotated in a corresponding direction of rotation. Through the mechanical coupling between the at least one first leg and the at least one second leg, the rotation of the at least one first leg is transferred to the at least one second leg. Accordingly, the at least one second leg moves or rotates analogously to the at least one first leg. The movement of the entirety of the at least one first leg and the at least one second leg advantageously results in the displacement of the at least one support element or the seat part.Due to the advantageous embodiment in which the lever section of the at least one second leg has a greater length than the lever section of the first leg, the rotation of the at least one second leg differs from the rotation of the at least one first leg. This difference is advantageously dependent on the ratio of the lengths of the lever sections of the at least one first and the at least one second leg. Advantageously, this difference causes a rotation of the spacing element and a different displacement along the height axis Z of the front region relative to the rear region of the at least one support element or seat part, thereby causing a change in the angle of inclination θ. The angle adjustment device can advantageously act directly only on the at least one first leg.Preferably, the angle adjustment device also acts indirectly on the at least one second leg through the said mechanical coupling.

[0019] Advantageously, the angle α extends between a central axis of the first leg 6 and a fictitious reference line of the support element, which runs substantially perpendicular to the seat part. The angle α lies in a range between 0° and 140°. Preferably, the angle α lies in a range between 0° and 120°. More preferably, the angle α lies in a range between 0° and 90°. Advantageously, the change in the seat position along the height axis Z and along the longitudinal axis X is proportional to a change in the angle α.

[0020] Preferably, an operating element is provided by which the angle adjustment device can be operated. Therefore, only one operating device needs to be actuated to adjust the seat position. Preferably, the vehicle seat can also have at least one additional adjustment device for the seat position along the longitudinal axis X, by means of which an additional adjustment of the seat position is possible. This enables individual adjustment of the seat position.

[0021] According to a particularly preferred embodiment, the connecting element is suitable and intended to hold its modifiable length, preferably until a further modification is carried out. This means that the length of the connecting element is adjustable and the set length is then held by the connecting element until a further adjustment takes place. Advantageously, the connecting element can be controlled by means of an operating and control device. It is advantageous that the operating and control device comprises a memory device by means of which specific length values of the connecting element can be stored. Since the specific length values can correspond to specific inclination angles θ, preferred inclination settings are thus stored and selected accordingly by the user. Advantageously, the length of the connecting element is continuously adjustable.

[0022] According to a preferred embodiment, the connecting element is a lockable gas spring. According to a further advantageous embodiment, the connecting element is an actuating element. Preferably, the actuating element comprises a screw jack. This screw jack is driven by a corresponding advantageous actuator, which can preferably be an electric motor.

[0023] According to a further preferred embodiment, the modification of the length of the connecting element causes a rotation of the at least one second leg about at least the axis of rotation with respect to a rotation relative to the connecting element and about the axis of rotation with respect to a rotation relative to the seat substructure. Advantageously, the modification of the length of the connecting element causes a rotation of the at least one second leg about the axis of rotation with respect to a rotation relative to the support element. Advantageously, the angle α is fixed when the length of the connecting element is modified. This can preferably be done by the angle adjustment device or the fixing element. Advantageously, the modification of the length of the connecting element does not cause a rotation of the at least one first leg. Preferably, a rotation of the second leg causes the change in the angle of inclination θ.

[0024] According to a further preferred embodiment, the first section of the at least one first leg and the first section of the at least one second leg have the same length. Preferably, the axes of rotation with respect to the rotation relative to the support element of the at least one first leg and the at least one second leg lie on a first fictitious or real connecting line. Furthermore, it is preferred that the axes of rotation with respect to the rotation relative to the seat substructure of the at least one first leg and the at least one second leg lie on a second fictitious or real connecting line. Advantageously, the first connecting line, the second connecting line, and the first sections of the at least one first leg and the at least one second leg form a trapezoid. Such a trapezoidal shape facilitates the simultaneous displacement of the seat surface along the height axis Z and the longitudinal axis X.The trapezoid can be a parallelogram if the first sections each have the same length and the first and second connecting lines have the same length.

[0025] The connecting lines that form the advantageous trapezoid or parallelogram can therefore be real connecting lines, meaning the connecting line is encompassed by a corresponding element, such as the seat base or the support element. However, it is also conceivable that, although connections exist between the legs, these do not represent direct connections between the axes of rotation. Thus, for example, the actual connections between the axes of rotation could lie above or below the fictitious connecting line along the vertical axis Z.

[0026] According to a further preferred embodiment, the lever section of the at least one first leg and the lever section of the at least one second leg have different lengths. Preferably, the axes of rotation with respect to the rotation of the at least one first leg and the at least one second leg relative to the connecting element lie on a third fictitious or real connecting line. It is preferred that the second connecting line, the third connecting line, and the second sections of the at least one first leg and the at least one second leg form a (general) quadrilateral. In an embodiment in which the lever section of the at least one first leg and the lever section of the at least one second leg have the same length, the quadrilateral would be a second trapezoid, or a parallelogram, if the second and third connecting lines also have the same length.By changing the length of the connecting element, both the first trapezoid and the second trapezoid advantageously change.

[0027] Advantageously, a change in inclination when changing the seat position along the vertical axis Z and along the longitudinal axis X in the described embodiment, in which the arrangement of the legs describes a general quadrilateral, can be compensated for by modifying the length of the connecting element, so that the support element or the seat surface is aligned essentially horizontally or parallel to the body floor. This can preferably be done automatically. For this purpose, the operating and control device can be connected to corresponding sensors that detect a corresponding change in the seat position. The operating and control device can then calculate the necessary modification of the length of the connecting element and control the connecting element accordingly.

[0028] According to a further preferred embodiment, two first legs and two second legs are provided. Preferably, the two first legs are spaced apart from each other along the width axis Y. Preferably, the two first legs are rotatable about the same axes of rotation. Advantageously, the two second legs are spaced apart from each other along the width axis Y. Preferably, both second legs are rotatable about the same axes of rotation.

[0029] The axes of rotation about which the pairs of first legs and second legs are each rotatable can preferably be axes mounted in a corresponding pivot bearing of the legs. The respective axis of rotation can be a continuous real axis mounted in the corresponding pivot bearing of the legs. The axis of rotation can also be a continuous fictitious axis extending through corresponding pivot bearings of the two legs.

[0030] Preferably, the legs opposite each other along the width axis Y are connected by at least one cross connection. These cross connections can advantageously be realized through the support element or through the seat part. However, it would also be conceivable for the cross connections to be realized through other struts, rods, etc.

[0031] According to a further preferred embodiment, at least one support element must be a plate-like element which extends along the longitudinal axis X and the width axis Y. The first and second legs are preferably arranged on the underside of this plate-like element. Accordingly, the first longitudinal connection(s) is / are realized by the plate-like element. Advantageously, the seat part is arranged on the upper side of the plate-like element. However, it would also be conceivable to provide several support elements. The respective transverse connections and the first longitudinal connections would then advantageously be realized by the seat part.

[0032] According to a further preferred embodiment, the angle adjustment device comprises a locking device that locks a set angle α. Accordingly, the locking device preferably fixes and maintains the orientation of the at least one first leg relative to the support element or relative to the seat base. Likewise, the mechanical coupling between the at least one first and at least one second leg fixes and maintains the orientation of the at least one second leg relative to the support element or relative to the seat base. Such a locking device can preferably be a so-called "recliner." Advantageously, the angle adjustment device comprises a drive by means of which the locking device is driven to change the angle α. The angle adjustment device is preferably an electrically controllable gear unit.Preferably, the angle adjustment device comprises a control unit that controls the drive. It is advantageous that specific seating positions can be stored in the control unit. The user can then switch between the stored positions. Preferably, an operating device is provided, by means of which the user can make corresponding inputs.

[0033] According to a further preferred embodiment, the device is a modular component. Accordingly, the device for adjusting a seat position for a vehicle seat is advantageously not integrated into other components of a vehicle seat. Advantageously, the device can be arranged between the seat substructure and the seat part. Only corresponding fastening elements need to be provided. This makes it possible to simplify the structure of the seat substructure. An advantageous vertical suspension, which is independent of the device due to the modular structure, could thus be reduced to its main task of isolating vibrations and maintaining the height level. The modular design of the device also makes it possible to easily retrofit existing vehicle seats with this device.

[0034] The present object is also achieved by a vehicle seat with a device according to one of the described embodiments.

[0035] The vehicle seat can be equipped with all the features already described above in the context of the device for adjusting a seat position for a vehicle seat, individually or in combination with one another, and vice versa.

[0036] The vehicle seat can advantageously comprise a scissor-type frame, by means of which the vehicle seat is attached to the vehicle or the body floor. Furthermore, it is advantageous for the vehicle seat to comprise a spring and / or damping device for absorbing / damping vertical and / or horizontal vibrations. Due to the preferred modular design described above, the seat substructure can be designed more simply.

[0037] According to a further embodiment, the vehicle seat may comprise a device for adjusting the seat position along the longitudinal axis X. This may, for example, be a rail system on the body floor on which the seat substructure is displaceably arranged.

[0038] Furthermore, it is preferred if the vehicle seat comprises a device for adjusting the inclination of the seat part.

[0039] The vehicle seat can be designed as a driver’s seat or as a passenger seat.

[0040] Further advantages, objects, and features of the present invention will become apparent from the following description of the accompanying figures. Similar components may have the same reference numerals in the various embodiments.

[0041] The figures show: Fig. 1a, 1b: a side view of the vehicle seat according to one embodiment; Fig. 2a to 2c: a view of the vehicle seat according to one embodiment in different seating positions; Fig. 3a to 3c: a view of the vehicle seat according to one embodiment in different seating positions; Fig. 4a to 4d: a view of the vehicle seat according to one embodiment in different seating positions; Fig. 5a to 5c: a view of the vehicle seat according to one embodiment in different seating positions; Fig. 6: a detailed view including the first rotary arm; Fig. 7: an adjustment curve of the vehicle seat; Fig. 8: an isometric view of the device for adjusting a seating position; Fig. 9: an isometric view of the device for adjusting a seating position; Fig. 10: a side view of the device for adjusting a seating position; Fig. 11: a top view of the device for adjusting a seating position; Fig. 12: a side view of the device for adjusting a seating position;Fig. 13: Side view of the device for adjusting a seat position; Fig. 14: Top view of the device for adjusting a seat position; Fig. 15a to 15c: Side view of the device for adjusting a seat position in different inclination positions.

[0042] In the Figures 1 to 15ca device 2 for adjusting a seat position for a vehicle seat 1 is shown. The device 2 comprises at least one support element 3 for a seat part 4 and can be connected to a seat base 5. The device 2 further comprises at least one first leg 6 and at least one second leg 7, wherein the legs 6, 7 can be rotatably arranged on the seat base 5 and the at least one support element 3, wherein a first angle α between the first leg 6 and the support element 3 can be adjusted by an angle adjustment device 8, wherein the at least one first leg 6 and the at least one second leg 7 each have a lever section 6b, 7b which are mechanically coupled, wherein a change in the angle α causes a displacement of the at least one support element 3 along a height axis Z and a change in an angle of inclination θ of the support element 3.

[0043] The mechanical coupling comprises a connecting element 19, which connects the lever sections 6b, 7b of the legs 6, 7. The change in the angle of inclination θ is caused by a different length of the lever sections 6b, 7b of the at least one first leg and the at least one second leg 7. The lever section 7b of the at least one second leg 7 has a greater length than the lever section 6b of the at least one first leg 6. Alternatively or cumulatively, the change in the angle of inclination θ can be caused by a modification of the length of the connecting element 19.

[0044] The vehicle seat, or the device for adjusting the seat position, extends along a height axis Z, a longitudinal axis X and a width axis Y.

[0045] The vehicle seat 1 can of course comprise a backrest, a headrest and armrests, as shown for example in the Figures 1a and 1bis shown. The seat part 4 can comprise a shell element with a cushion element arranged thereon or merely a cushion element. The seat part 4 comprises a front region 4a, which in one embodiment as a driver's seat faces the pedals of the vehicle. The rear region 4b opposite the front region borders the backrest. Accordingly, a front region 3b of the support element 3 and a rear region of the support element 3 can be defined. The seat substructure 5 can advantageously comprise a scissor frame 27, by means of which the vehicle seat 1 is fastened to the vehicle, or rather to the body floor 29. Furthermore, it is advantageous that the seat substructure 5 comprises a spring and / or damping device 28 for cushioning / damping vertical and / or horizontal vibrations. This is shown in the Figures 1a and 1b indicated.

[0046] As can be seen from the Figures 1 to 15cAs can be seen, the device 1 for adjusting a seat position is a modular component and can thus be easily integrated into a vehicle seat 1. Furthermore, older vehicle seats can be retrofitted with such a modular component.

[0047] The angle of inclination θ extends between a central axis 38 of the at least one support element 3 and a reference axis 39, which is substantially parallel to a longitudinal axis X of the device 2. At an angle of inclination θ greater than 0°, the front region 4a of the seat part 4, or a front region 3b of the support element 3, is pivoted upwards along the height direction Z. At an angle of inclination θ less than 0°, the front region 4b of the seat part 4, or a front region 3b of the support element 3, is pivoted downwards along the height direction Z.

[0048] The at least one first leg 6 is arranged along the longitudinal axis X behind the at least one second leg 7. Furthermore, the at least one first leg 6 and the at least one second leg 7 are connected along the longitudinal axis X by means of a first longitudinal connection 9. The first longitudinal connection 9 is realized by the at least one support element 3 or by the seat part 4. In the Figures 8 to 15c The support element 3 comprises a plate-like element 30 on which the seat part 4 can be arranged. The first longitudinal connection 9 is thus provided by the plate-like element 30.

[0049] Furthermore, the at least one first leg 6 is connected along the longitudinal axis X to the at least one second leg 7 by means of a second longitudinal connection 10, which is realized by the seat substructure 5.

[0050] The at least one first leg 6 and the at least one second leg 7 each have a first section 6a, 7a and a lever section 6b, 7b. The first section 6a, 7a and the lever section 6b, 7b extend essentially in a straight line and thereby enclose an angle β, whereby the at least one first leg 6 and the at least one second leg 7 are essentially L-shaped. The angle β is therefore in a range between 20° and 100°, preferably between 45° and 90°, more preferably between 95° and 85°, more preferably 90°. Accordingly, a bending region 6c, 7c is provided between the first section 6a, 7a and the lever section 6b, 6b.

[0051] The at least one first leg 6 is mounted rotatably about a first axis of rotation 11 relative to the support element 3. The at least one first leg 6 and the support element 3 thereby enclose a first angle α. Advantageously, the angle α extends between a central axis of the first leg 6 and a fictitious reference line of the support element, which runs substantially perpendicular to the seat part.

[0052] The at least one second leg 7 is mounted for rotation about a second axis of rotation 12 relative to the support element 3. The respective first section 6a, 7a of the at least one first leg 6 and of the at least one second leg 7 have an upper end region in which the axis of rotation 11, 12 is arranged with respect to the rotation relative to the support element 3.

[0053] The at least one first leg 6 is mounted for rotation about a third axis of rotation 13 relative to the seat base 5. The at least one second leg 7 is mounted for rotation about a fourth axis of rotation 14 relative to the seat base 5. The third axis of rotation 13 and the fourth axis of rotation 14 are arranged in the respective bending regions 6c, 7c. Accordingly, the first section 6a of the first leg 6 would extend substantially between the first axis of rotation 11 and the third axis of rotation 13. The first section 7a of the second leg 7 extends substantially between the second axis of rotation 12 and the fourth axis of rotation 14.

[0054] The at least one second leg 7 is indirectly connected to the at least one support element 3. The at least one second leg 7 is connected to the support element 3 via a spacing element or a connecting rod 33. The spacing element or connecting rod 33 is rotatable about the second axis of rotation 12 relative to the at least one second leg 7. Furthermore, the spacing element or connecting rod 33 is rotatable about a seventh axis of rotation 34 relative to the support element 3. The spacing element 33 provides an additional degree of freedom, which facilitates adjustment of the inclination of the seat part 4.

[0055] The connecting element 19 is arranged between the lever section 6b of the first leg 6 and the lever section 7b of the second leg 7. The first leg 6 is rotatably mounted about a fifth axis of rotation 15 relative to the connecting element 19. The second leg 7 is rotatably mounted about a sixth axis of rotation 16 relative to the connecting element 19. The fifth axis of rotation 15 and the sixth axis of rotation 16 are each arranged in a lower end region of the lever sections 6b, 7b. The respective lever section 6b, 7b thus extends essentially between the third axis of rotation 13 and the fifth axis of rotation 15, or between the fourth axis of rotation 14 and the sixth axis of rotation 16.Accordingly, a third longitudinal connection 23, which can preferably be modified in length, can be defined along the longitudinal axis X, which extends between the lever section 6b of the at least one first leg 6 and the lever section 7b of the at least one second leg 7 and is realized by the connecting element 19.

[0056] The device 1 comprises two first legs 6 and two second legs 7. The two first legs 6 and the two second legs 7 are each spaced apart from one another along the width axis Y. The two opposing first legs 7 and the two opposing second legs 7 are each essentially identical. The further description of the legs 6, 7 in the form of at least one leg 6, 7 is therefore applicable to the respective pair of legs. The two first legs 6 and the two second legs 7 are also rotatable about the same axes of rotation 11, 12, 13, 14, 15, 16. Furthermore, the legs 6, 7 opposite one another along the width axis Y are connected by means of at least one transverse connection 24. Such a transverse connection 24 is realized by the support element 3, which is designed as a plate-like element 30. Furthermore, further struts, plates, etc.which also form the cross connection 24.

[0057] The angle α is adjustable by an angle adjustment device 8. A change in the angle α causes a displacement of the at least one support element 3 along a height axis Z and along a longitudinal axis X. A change in the angle α, which causes a downward displacement of the at least one support element 3 along the height axis Z, simultaneously causes a forward displacement of the at least one support element 3 along the longitudinal axis X and optionally (if the lever section 7b has a greater length than the lever section 6b) a change in the inclination angle θ in the negative direction.A change in the angle α, which causes a displacement of the at least one support element 3 along the height axis Z upwards, simultaneously causes a displacement of the at least one support element 3 along the longitudinal axis X to the rear and optionally (if the lever section 7b has a greater length than the lever section 6b) a change in the angle of inclination θ in the positive direction.

[0058] In the embodiment according to the Figures 5a to 5cThe lever section 7b of the at least one second leg 7 has a greater length than the lever section 6b of the at least one first leg 6. When the angle α is changed by an angle adjustment device 8, the at least one first leg 6 rotates about the third axis of rotation 13. The mechanical coupling by means of the connecting element 19 causes the at least one second leg 7 to rotate about the fourth axis of rotation 14. The corresponding angle of rotation about this fourth axis of rotation 14 is determined by the length of the lever section, or the distance between the sixth axis of rotation 16 and the fourth axis of rotation 14. Due to the greater length of the lever section of the second leg 7, the at least one second leg 7 is rotated about the fourth axis of rotation by a greater angle of rotation than the at least one first leg 6 is rotated about the third axis of rotation 13.The rotation of at least the second leg 7 about the fourth pivot 14 causes a rotation of the spacing element 33 about the second pivot 12 and the seventh pivot axis 34. This, in turn, causes a change in the angle of inclination θ. Furthermore, a displacement of the support element 3 along the height direction Z and along the longitudinal direction X takes place.

[0059] When modifying the length of the connecting element 19, the distance between the fifth axis of rotation 15 and the sixth axis of rotation 16, or between the two lever sections 6b, 7b of the legs 6, 7, is reduced or increased.

[0060] The modification of the length of the connecting element 19 causes a rotation of the at least one second leg 7 about at least the sixth rotation axis 16 and the fourth rotation axis 14. Furthermore, the modification of the length of the connecting element 19 can also cause a rotation of the at least one second leg 7 about the second rotation axis 12. The angle α can, but need not, be fixed during the modification.

[0061] The angle of inclination θ extends between a central axis 38 of the at least one support element 3 and a reference axis 39, which is substantially parallel to the longitudinal axis X of the device 2. The change in the angle of inclination θ is proportional to the change in the length of the connecting element 19. Figures 4a and 15aThis shows an inclination of the support element 3 or the seat part 4 to the rear. The second rotation axis 12, the seventh rotation axis 34 and thus a front area of the support element 3 or the seat part 4 are displaced or pivoted upwards along the vertical axis Z. The length of the connecting element 19 has been increased and the sixth rotation axis 16 has been displaced forwards essentially along the longitudinal axis X. The angle of inclination θ therefore has positive values. Figures 4b and 15b the support element 3, or the seat part, is aligned essentially horizontally. The angle of inclination θ between a central axis 38 and the reference axis 39 is thus essentially 0°. Figures 4c and 15c, a forward inclination of the support element 3 or the seat part 4 is shown. The second rotation axis 12, the seventh rotation axis 34 and thus a front edge region of the support element 3 or the seat part 4 is displaced downwards or pivoted along the vertical axis Z. The length of the connecting element 19 has been reduced and the sixth rotation axis 16 has been displaced rearwardly essentially along the longitudinal axis X. The angle of inclination θ has negative values in this case. Figure 4d the vehicle seat 1 is shown, with various inclination settings of the vehicle seat 1 being indicated.

[0062] The spacing element, or the connecting rod 33, rotates during the inclination changes according to the Figures 4a to 4c and 15a to 15c accordingly. With the essentially horizontal alignment of the seat part 4 in the Figures 4b and 15bthe spacing element, or the connecting rod 33, is aligned such that the second axis of rotation 12 and the seventh axis of rotation 34 are arranged one above the other substantially along the height axis Z. In the inclination arrangement of the seat part 4 according to the Figures 4a and 15a the spacing element, or the connecting rod 33, is aligned such that the seventh axis of rotation 34 is displaced forward relative to the second axis of rotation 12 along the longitudinal direction X. In the inclination arrangement of the seat part 4 according to the Figures 4c and 15c the spacing element, or the connecting rod 33, is aligned such that the seventh axis of rotation 34 is displaced rearwardly relative to the second axis of rotation 12 along the longitudinal direction X.

[0063] The length of the connecting element 19 is continuously adjustable. In addition, the connecting element 19 is suitable and intended to maintain its modifiable length, preferably until a further modification is carried out. Corresponding undesired forces applied to the device 2 or the connecting element 19 therefore do not cause any undesired change in the length of the connecting element 19. The connecting element 19 can be a lockable gas spring or an adjusting element. However, other similar elements are also conceivable by means of which the length can be modified and held. An adjusting element comprises, for example, a spindle jack which is driven by a drive, for example an electric motor. The spindle jack converts the rotating movement of the drive into a linear movement. In the rest position, the spindle jack blocks further linear movement.Lockable gas springs can be continuously locked in either the rebound or compression direction. Lockable gas springs typically include a piston-valve system that separates the two pressure chambers within the spring. This allows for continuous locking without the need for force. If the valve stem is released from the outside, interrupting the exchange between the two pressure chambers, the gas spring locks.

[0064] The connecting element can be operated manually by means of an operating element, for example a lever. Alternatively or additionally, an operating and control device 38 can be provided, by means of which the connecting element 19 can be controlled. The one operating and control device 38 can comprise an operating element 40, which can be a lever, a button, a joystick, or the like. The operating and control device 38 can further comprise a memory device 39, by means of which specific length values of the connecting element 19 can be stored. This is, for example, Figure 4d The user can therefore directly control certain preferred tilt settings.

[0065] The first section 6a of the at least one first leg 6 and the first section 7a of the at least one second leg 7 have the same length. The first axis of rotation 11 and the second axis of rotation 12 lie on a first fictitious or real connecting line 17. Likewise, the third axis of rotation 13 and the fourth axis of rotation 14 lie on a second fictitious or real connecting line 18. The first connecting line 17, the second connecting line 18 and the first sections 6a, 7a of the at least one first leg 6 and the at least one second leg 7 thus form a first trapezoid 21. This is well understood in Figure 2c Since the two connecting lines 17 and 18 have the same length, the trapezoid 21 is a parallelogram.

[0066] Out of Figure 9It can be seen that a pivot joint or pivot bearing is arranged in the end regions of the two first legs 6, in the end regions of the two second legs 7, and in the bending regions 6c, 7c. The respective rotation axes 11, 12, 13, 14, 15, 16 are therefore fictitious. Of course, a continuous real rotation axes 11, 12, 13, 14 could also be provided.

[0067] The fifth rotation axis 15 and the sixth rotation axis 16 lie on a third fictitious or real connecting line 20.

[0068] In the embodiments according to the Figures 2a to 2c and 4a to 4d The lever section 6b of the at least one first leg 6 and the lever section 7b of the at least one second leg 7 have the same length. Accordingly, the second connecting line 18, the third connecting line 20, and the lever sections 6b, 7b form a second trapezoid 22.

[0069] In the embodiments according to the Figures 3a to 3c and 5a to 5c the lever section 7b of the at least one second leg 7 has a greater length than the lever section 6b of the at least one first leg 6. The second connecting line 18, the third connecting line 20 and the lever sections 6b, 7b therefore form a general quadrilateral 31. As a result, a change in the angle α can cause not only a change in the sitting position along the vertical axis Z and the change in the sitting position along the longitudinal axis X, but also a change in the inclination of the seat part 4 or of the support element 3. By appropriately adjusting the length of the connecting element 19, the inclination of the seat part 4 can be adjusted in such a way that the seat part 4 is aligned horizontally when the sitting position changes.

[0070] The first connecting line 18 can therefore correspond to the first longitudinal connection 9. In the Figures 1 to 14However, it is shown that the first longitudinal connection 9 and the first fictitious connecting line 18 are spaced apart from one another along the height axis Z. The second connecting line 18 corresponds to the second longitudinal connection 10, although the invention is not limited thereto. The third connecting line 20 can, but does not have to, correspond to the third longitudinal connection 23 or the connecting element 19. The mechanical coupling preferably comprises the first longitudinal connection 9, the second longitudinal connection 10, and the third longitudinal connection 23. Furthermore, in the embodiment in which the first legs 6 and second legs 7 are designed as pairs of legs, the transverse connection 24 can be considered to belong to the mechanical coupling.

[0071] The at least one first leg 6, or the corresponding pair of legs, is / are arranged or rotatably mounted directly on the support element 3 via a pivot bearing. The first axis of rotation 11 runs centrally through this pivot bearing. The at least one second leg 7, or the corresponding pair of legs, is arranged or mounted indirectly on the support element 3 via the spacing element 33 and a corresponding pivot bearing. Furthermore, the spacing element 33 is arranged on the support element 3 by means of a further pivot bearing. The second axis of rotation 12 runs centrally through this pivot bearing. The at least one second leg 7, or the corresponding pair of legs, can also be arranged or mounted directly on the support element 3 via a pivot bearing.

[0072] In the embodiment based on the Figures 2a to 2cThe kinematics of the height adjustment are implemented in the form of a second trapezoid 22. This trapezoid 22 is adjustable to allow additional inclination adjustment via the degree of freedom of the movable connecting rod 33. When the height is adjusted, the seat part 4 moves upwards (downwards) parallel to the initial position, i.e., no angle change is made in the XY plane with respect to the seat part 4. An angle change can only be achieved by changing the length of the connecting element 19. At the same time, the seat part 4 moves backwards (forwards) in the longitudinal direction X due to the pivoting movement of the legs 6, 6. If no inclination adjustment is required in this embodiment, the kinematics can also be designed as a simple parallelogram. In this case, the connecting rod 33 can also be omitted and is then directly connected to the support element 3 adapted for this purpose via the second rotation axis 12. Figure 2aThe lowest position is shown, in which the seat height is at its lowest. Furthermore, the seating position in the longitudinal direction X is at its maximum. Figure 2c The top position is shown, in which the maximum seat height and the maximum seat position in the longitudinal direction X to the rear are taken. Figure 2b A correspondingly middle seating position is shown. However, the longitudinal seating position can be further modified using an additional adjustment device if necessary.

[0073] In the embodiment based on the Figures 3a to 3cthe kinematics of the height adjustment is implemented in the form of a general quadrilateral. This enables a further change in the inclination of the upper seat section in the XY plane. When the height is changed, the seat part 4 does not move upwards (downwards) parallel to the starting position, i.e. an angular change is made in the XY plane with regard to the seat part 4. This kinematic sequence is achieved by different geometries of the two legs 6, 7. In the illustrations shown, the seat surface tilts forwards or backwards when the height is changed. An additional adjustment of the inclination is possible by means of the connecting element 19, the length of which can be modified. The connecting element 19 can also be provided as a rigid element. In this case, however, a spacing element 33 or connecting rod must be provided.By pivoting the spacing element 33 about the second rotation axis 12 and the seventh rotation axis 34, a corresponding compensation along the longitudinal axis X can be achieved, thereby preventing an inclination of the seat part 4. Accordingly, a change in the height of the seat part 4 can be made upwards (downwards) parallel to the initial position, ie, no angular change is made in the plane XY with respect to the seat part 4. In . Figure 3a The lowest position is shown, in which the seat height is at its lowest. Furthermore, the seating position in the longitudinal direction X is at its maximum. Figure 3c An uppermost position is shown, in which the maximum seat height and the maximum seating position in the longitudinal direction X are taken up. By rotating the connecting rod 33 accordingly, the seat part is essentially horizontal. Figure 3bA correspondingly middle seating position is shown. However, the longitudinal seating position can be further modified using an additional adjustment device if necessary.

[0074] In the embodiment based on the Figures 4a to 4c A kinematic system is shown using a second trapezoid 22. In this kinematic system, an inclination adjustment is performed by changing the length of the connecting element 19. In the illustrated case, an angular change of the XY plane, around the Y-axis, from the center position of approximately + / -3° is provided. The connecting element 19 is designed in the described version as a lockable gas spring. This includes a defined extension force and also fixed end positions (in / out length). Other designs for this connecting element 19 are also envisaged, such as an electric version in the form of a spindle jack with the option of memorization. Figure 4ba seating position is shown in which the seat part is aligned essentially horizontally, or parallel to a plane XY, which is spanned by the longitudinal axis X and the width axis Y. In Figure 4a a seating position is shown in which the seat part 4 tilts backwards. In comparison to the seating position in Figure 4b The connecting element 19 has a greater length here. In Figure 4c a seating position is shown in which the seat part 4 tilts forward. In comparison to the seating position in Figure 4b Here, the connecting element 19 has a shorter length. Here, too, a rotation of the connecting rod 33 allows for a corresponding compensation of the deflection along the longitudinal axis.

[0075] In the embodiment based on the Figures 5a to 5ca kinematics of the height adjustment is implemented in the form of a general quadrilateral, which allows an additional inclination adjustment by means of a connecting element 19 that can be modified in length, similar to the embodiment according to the Figures 4a to 4c In contrast to this embodiment, the inclination change in the upper lifting area can be used primarily to enable a horizontal position for the XY plane. In the lower to middle positions, the system behaves similarly to the embodiment based on the Figures 5a to 5c . In Figure 4b a seating position is shown in which the seat part is aligned essentially horizontally, or parallel to a plane XY, which is spanned by the longitudinal axis X and the width axis Y. In Figure 5b A seating position is shown in which the seat part is essentially horizontal or parallel to the XY plane. In Figure 5aa seating position is shown in which the seat part 4 tilts backwards. In Figure 5c A seating position is shown in which the seat part 4 tilts forward. Here, too, a rotation of the connecting rod 33 enables a corresponding compensation of the deflection along the longitudinal axis.

[0076] In the Figure 6the section is shown enlarged around the first axis of rotation 11. In particular, the angle α is clearly visible here. The angle α extends between a central axis 6d of the first leg 6 and a fictitious reference line of the support element 3a. This reference line is substantially perpendicular to the plate-like element 30. With an inclination-free alignment of the support element 3, or of the seat part 4, in which the seat part 4 runs substantially parallel to plane XY, the reference line of the support element 3a is substantially parallel to the height axis Z. The angle α lies in a range between 0° and 140°. Preferably, the angle α lies in a range between 0° and 120°. More preferably, the angle α lies in a range between 0° and 90°.

[0077] In the Figures 1a, 1b and 7an adjustment curve 32 of the vehicle seat 1 is visible. A change in the angle α, which causes a downward displacement of the at least one support element 3 or the seat part 4 along the vertical axis Z, simultaneously causes a forward displacement of the at least one support element 3 or the seat part 4 along the longitudinal axis X. A change in the angle α, which causes an upward displacement of the at least one support element 3 or the seat part 4 along the vertical axis Z, simultaneously causes a rearward displacement of the at least one support element 3 or the seat part along the longitudinal axis X. Figure 7 Example values for the adjustment angle, the rearward offset, and the upward offset are given. The invention is, of course, not limited to these values.

[0078] In the Figures 8 to 14the angle adjustment device 8 is clearly visible. The angle adjustment device 8 comprises a locking device 25, which can also be referred to as a recliner and which locks a set angle α. Furthermore, the angle adjustment device 8 comprises a drive 26, by means of which the locking device 25 is driven in order to change the angle α. Preferably, the angle adjustment device 8 comprises a control unit which controls the drive 26. It is advantageous that specific seating positions can be stored in the control unit. The user can then switch between the stored positions. Preferably, an operating device is provided by means of which the user can make corresponding inputs. The drive 26 is positively connected to a primary shaft 35.The primary shaft 35, which is provided for space-saving reasons, extends from the right to the left side and contains a spur gear 36 at both ends, which is also positively connected. The spur gears 36 of the primary shaft 35 transmit the power to another spur gear 37, which are also positively connected by means of short secondary shafts, each with a locking device 25 or recliner. The two locking devices 25 non-positively connect the first legs 6 on the left and right to the support element 3. When the height adjustment is actuated, a torque is generated by the drive 26. The torque and rotation are transmitted from the primary shaft 35 via the spur gears 36, 37 to the secondary shafts, which are connected to the locking device 25. The torque is therefore transmitted synchronously to the left and right.This causes the first legs to pivot relative to the support element 3.

[0079] The Figures 11 and 14 represent a respective top view of the device 2, wherein in Figure 12 a section of the device 2 is shown. The Figure 10 and 13 show a side view in which the pivoting of the legs 6, 7 relative to the support element 3 is visible. The equalization or forced control of the first leg 6 is carried out by the connecting element 19, which can be designed as a rigid element or as an element with variable length.

[0080] Such a device 1 can be designed separately from the vertical suspension. This prevents any interference with height adjustment and suspension travel. The device provides ergonomic seat adjustment and creates a height-dependent distance from the steering wheel and pedals. List of reference symbols

[0081] 1Vehicle seat 2Device for adjusting a seat position 3Support element 3aReference line of the support element 3bFront area of the support element 3cRear area of the support element 4Seat part 4Front area of the seat part 4bRear area of the seat part 5Seat substructure 6First leg 6aFirst section of the first leg 6bLever section of the first leg 6cKnock area of the first leg 6dCentral axis of the first leg 7Second leg 7aFirst section of the second leg 7bLever section of the second leg 7cKnock area of the second leg 8Angle adjustment device 9First longitudinal connection 10Second longitudinal connection 11First axis of rotation 12Second axis of rotation 13Third axis of rotation 14Fourth axis of rotation 15Fifth axis of rotation 16Sixth Rotation axis 17First connecting line 18Second connecting line 19Connecting element 20Third connecting line 21First trapezoid 22Second trapezoid 22aSquare 23Third longitudinal connection 24Cross connection 25Locking device 26Drive 27Scissor frame28Spring and / or damping device 29Body floor 30Plate-like element 31Square 32Adjustment curve 33Spacing element / connecting rod 34Seventh rotational axis 35Primary shaft 36Spur gear 37Spur gear 38Operating and control device 39Storage device 40Operating element ZHeight axis XLongitudinal axis YWidth axis αAngle βAngle θInclination angle

Claims

1. Device (2) for adjusting a seat position for a vehicle seat (1), which comprises at least one support element (3) for a seat part (4) and can be connected to a seat base (5), wherein the device (2) comprises at least a first leg (6) and at least one second leg (7), wherein the first leg (6) is rotatable about a third axis of rotation (13) and the second leg (7) is rotatable about a fourth axis of rotation (14) on the seat base (5) and rotatable on the at least one support element (3) arrangeable, wherein a first angle α between the first leg (6) and the support element (3) can be adjusted by an angle adjustment device (8), wherein the at least one first leg (6) and the at least one second leg (7) each have a lever section (6b, 7b) which are mechanically coupled and wherein the at least one first leg (6) is arranged along a longitudinal axis (X) behind the at least one second leg (7), wherein a change in the angle α causes a displacement of the at least one support element (3) along a height axis Z and a change in an angle of inclination θ of the support element (3), wherein the angle of inclination θ extends between a centre axis (38) of the at least one support element (3) and a reference axis (39), which is substantially parallel to the longitudinal axis (X), wherein the change in the angle of inclination θ is caused by different lengths of the lever sections (6b, 7b) of the legs (6, 7), wherein when the angle α is adjusted, the at least one first leg (6) rotates about the third axis of rotation (13) and the mechanical coupling causes the at least one second leg (7) to rotate about the fourth axis of rotation (14), characterised in that, the at least one second leg (7) is indirectly connected to the at least one support element (3), wherein the at least one second leg (7) is connected to the support element (3) via a spacer element (33), wherein the spacer element (33) is rotatable about an axis of rotation (12) relative to the at least one second leg (7), wherein the spacer element (33) is rotatable about a further axis of rotation (34) relative to the support element (3).

2. Device (2) according to claim 1, characterised in that the mechanical coupling comprises a connecting element (19) which connects the lever sections (6b, 7b) of the legs (6, 7), wherein the change in the angle of inclination θ is caused by the different lengths of the lever sections (6b, 7b) of the at least one first leg (6) and of the at least one second leg (7) or the change in the angle of inclination θ is caused by the different lengths of the lever sections (6b, 7b) of the at least one first leg (6) and of the at least one second leg (7) and is caused by a modification of the length of the connecting element (19), wherein the lever section (7b) of the at least one second leg (7) has a greater length than the lever section (6b) of the at least one first leg (6).

3. Device (2) according to claim 1 or 2, characterised in that at an angle of inclination θ greater than 0°, a front region (3b) of the support element (3) is tilted upwards along the height direction Z, wherein at an angle of inclination θ less than 0°, a front region (3b) of the support element (3) is tilted downwards along the height direction Z.

4. Device (2) according to claim 1 or 2, characterised in that a change in the angle α causes a displacement of the at least one support element (3) along a vertical axis Z and simultaneously along the longitudinal axis X and a change in an angle of inclination θ of the support element (3), wherein a change in the angle α causes a downward displacement of the at least one support element (3) along the vertical axis Z, simultaneously causes a displacement of the at least one support element (3) along the longitudinal axis X forwards and a change in the angle of inclination θ in the negative direction, wherein a change in the angle α, which causes a displacement of the at least one support element (3) along the vertical axis Z upwards, simultaneously causes a displacement of the at least one support element (3) along the longitudinal axis X backwards and a change in the angle of inclination θ in the positive direction.

5. Device (2) according to one of the preceding claims, characterised in that the at least one first leg (6) is connected along the longitudinal axis X to the at least one second leg (7) by means of a first longitudinal connection (9), which is realised by the at least one support element (3) or by the seat part (4), wherein the at least one first leg (6) and the at least one second leg (7) each have a first section (6a, 7a) and the lever section (6b, 7b), wherein the first section (6a, 7a) and the lever section (6b, 7b) enclose an angle β, whereby the at least one first leg (6) and the at least one second leg (7) are essentially L-shaped, wherein a buckling region (6c, 7c) is provided between the first section (6a, 7a) and the lever section (6b, 6b).

6. Device (2) according to claim 5, characterised in that the at least one first leg (6) and the at least one second leg (7) are each mounted rotatably about an axis of rotation (11, 12) relative to the support element (3), wherein the axis of rotation (11, 12) is arranged in an upper end region of the first section (6a) with respect to the rotation relative to the support element (3), wherein the axis of rotation (13, 14) is arranged in the buckling region (6c, 7c) with respect to the rotation relative to the seat base (5).

7. Device (2) according to claim 1 or 2, characterised in that the connecting element (19) is suitable and intended for holding the modified length, wherein the connecting element (19) can be controlled by means of an operating and control device (38), wherein the operating and control device (38) comprises a storage device (39), by means of which certain length values of the connecting element (19) can be stored, wherein the length of the connecting element (19) can be continuously adjusted, wherein the connecting element (19) is a lockable gas spring or an actuating element, wherein the actuating element comprises a screw jack.

8. Device (2) according to one of claims 5 to 6, characterised in that the modification of the length of the connecting element (19) causes a rotation of the at least one second leg (7) about at least the axis of rotation (16) with respect to a rotation relative to the connecting element (19) and about the axis of rotation (14) with respect to a rotation relative to the seat base (5), wherein the modification of the length of the connecting element (19) does not cause a rotation of the at least one first leg (6).

9. Device (2) according to any of the preceding claims, characterised in that the first section (6a) of the at least one first leg (6) and the first section (7a) of the at least one second leg (7) have the same length, wherein the axes of rotation (11, 12) with respect to the rotation relative to the support element (3) of the at least one first leg (6) and of the at least one second leg (7) lie on a first fictitious or real connecting line (17), wherein the axes of rotation (13, 14) lie on a second fictitious or real connecting line (18) with respect to the rotation relative to the seat base (5) of the at least one first leg (6) and of the at least one second leg (7), wherein the first connecting line (17), the second connecting line (18) and the first sections (6a, 7a) of the at least one first leg (6) and of the at least one second leg (7) form a trapezium (21).

10. Device (2) according to one of the preceding claims, characterised in that the angle adjustment device (8) comprises a fixing device (25) which fixes a set angle α, wherein the angle adjustment device (8) comprises a drive (26) by means of which the fixing device (25) is driven in order to change the angle α.

11. Device (2) according to one of the preceding claims, characterised in that two first legs (6) and two second legs (7) are provided, wherein the two first legs (6) are spaced apart along the width axis Y and are rotatable about the same axes of rotation (11, 13, 15), wherein the two second legs (7) are spaced apart along the width axis Y and are rotatable about the same axes of rotation (12, 14, 16), wherein the legs (6, 7) lying opposite each other along the width axis Y are connected by means of at least one transverse connection (23).

12. Device (2) according to one of the preceding claims, characterised in that the device (2) is a modular component.

13. A vehicle seat (1) comprising a device (1) according to any one of the preceding claims.

14. Vehicle seat (1) according to claim 13 characterised in that the vehicle seat (1) comprises a scissor frame (27), by means of which the vehicle seat (1) is fastened to a body floor (26), wherein the vehicle seat (1) comprises a spring and / or damping device (28) for springing / damping vertical and / or horizontal vibrations.