DE20300765U1 - Vehicle seat, adjusted via two pivoting legs connecting each end of seat region to seat support and floor construction - Google Patents

Abstract

A first seat leg (105) is located at one end of the seat region (101a) of the seat shell (101). The first leg is fixed to either the seat support (106) or floor construction (103b) and pivotally connected to the other of these two parts. An adjustable length second seat leg (104) is located at the other end of the seat region and pivotally connected to both the seat support and floor construction. The two legs act as seat adjustment parts. The seat shell can be adjusted by moving it along a curved path relative to the seat support. An independent claim is also included for a vehicle seat adjustment device.

Description

Such a seat adjustment device is used to adjust the position of a seat part in relation to a Motor vehicle assembly (which is also a seat assembly can act) and has an elongated Adjustment element on the one hand on the seat part and on the other hand is articulated on the motor vehicle assembly (pivotable) and that two along the length of the adjusting member has mutually displaceable components.

An adjusting element for a seat adjustment device The type described above can be used in particular for coupling a seat pan of a motor vehicle seat with a bottom side Motor vehicle assembly, e.g. a longitudinal rail of the motor vehicle seat serve.

The invention is based on the problem, a Seat adjustment device of the type mentioned continue to improve.

This problem is solved according to the invention the circuit of a seat adjustment with the features of Claim 1 solved.

After that, the actuator has the Seat adjustment device on a deformation element that at a Crash-related movement of the two components of the adjusting element to each other, which exceeds a predeterminable minimum distance, with one of the two Components engages and is deformable in such a way that the kinetic energy of the component at least partially in deformation energy is converted.

According to the solution according to the invention an adjusting member that is part of an adjusting device for one Motor vehicle seat for coupling the corresponding adjustable Serves seat part with a motor vehicle assembly, at the same time used to absorb crash energy and into deformation energy convert. Through this double function of the actuator, the on the one hand as a component of an adjustment device for the corresponding Seat part acts and on the other hand to compensate for possible Crash energy is used, the other components of the motor vehicle seat relieved of tasks related to the absorption of crash energy and can be trained accordingly easier. This is especially true for those Assemblies of the motor vehicle seat, such as the seat frame, that are particularly large and where a robust construction is particularly serious on the weight and penetrates the space requirement of the seat.

The longitudinal direction of the adjusting member preferably corresponds to a main direction of attack possible Crash forces in a typical crash case, such as a front or rear crash.

The minimum distance by which the two Components of the actuator must be moved to each other until the deformation element is effective, is preferably selected so that in the event of a minor accident with only low crash energies Seat leads, there is no influence on the deformation element or at most a slight deformation takes place, so that in such a case none damage of the actuator.

In a preferred embodiment the invention acts a movement of the two components of the adjusting member to each other an elastic force, so that a shift of the two components that exceed the predeterminable minimum travel (travel), only with crash forces occurs that exceed a predetermined minimum force. With lighter ones accidents the crash energy is absorbed by the spring elements, which the generate elastic force, and the deformation element will not active.

The corresponding spring elements can at the same time also serve for suspension of the seat in normal operation. this will are explained in more detail below.

According to one embodiment of the invention, the deformation element is used only with a relative movement of the two components of the adjusting member along a first direction with the associated component of the Actuator engaged, e.g. only with such a movement, as triggered by a rear-end crash.

In another embodiment it can be provided that the deformation element during a relative movement of the two components to each other along any direction along the longitudinal axis of the actuator becomes active, e.g. both with a front as well as in a rear-end crash.

The deformation element is preferably on arranged one of the two components of the adjusting member, that is fastened there or in one piece shaped this.

In a preferred embodiment of the Invention surrounds one component tubularly, e.g. by the two components of the adjusting element in the manner of a Interact piston and a cylinder. The inner component is then preferably regarding the outer slidable.

According to a further development of the invention the deformation element at least two along the direction of extension of the adjusting member from mutually spaced deformation areas, wherein the one deformation area for absorbing crash energy in the case of a Movement of the two components of the adjusting member along each other a first direction is provided and the second for receiving of crash energy when the two components move along the opposite Direction, corresponding e.g. a front or rear crash.

Furthermore, the adjusting member can have an adjusting device for adjusting the length of the ver be assigned to the actuator, so that the position of the seat part coupled to the adjustment member can be adjusted by changing the length of the adjustment member. As an alternative to adjusting the position of the seat part by changing the length of the adjusting member, for example, merely pivoting the adjusting member can be provided. By adjusting the position of the seat part, for example, an individual adaptation to different sized vehicle occupants and to different angles of inclination of the backrest of the seat can take place.

According to a variant of the invention is the adjustment device for actuation by a seat user trained so that a seat user can re-hire at any time the position of the corresponding seat part by actuating the adjusting device can make. This can be done manually, i.e. by applying the required adjustment force on the part of the seat user, as also powered, in particular electrically, in that the seat user merely uses one intended for this purpose Control element actuated and the actual adjustment force then by an electric motor or the like is applied.

According to another variant of the invention is the setting device for one-time, fixed presetting the length of the adjusting element when assembling the seat adjustment device educated.

Suitable as adjusting devices a gear or a spindle gear, which a corresponding Drive is assigned.

The adjustability of the length of the Adjusting element can be achieved, for example, in that one of the two mutually movable components of the adjusting member telescopic and therefore variable in length is trained. On the other hand, an adjustment of the length of the Adjustment member also by moving the two components to each other respectively.

In an advantageous further training a spring device is assigned to the adjusting member, so that the corresponding seat part is resilient via the adjusting member with the associated motor vehicle assembly, for example one Floor assembly of the motor vehicle, is connected.

In this case, the actuator takes over as third Function still the function of the suspension of the motor vehicle seat. this makes possible a further simplification in the structure of the seat. So immediately in the seat pan or the seat cushion of a motor vehicle seat Integrated spring elements saved or made more compact be, if a suspension of the seat pan (partially) over a spring-loaded adjusting member takes the form of a ischium.

Here, the adjusting member can, for example Suspension of the corresponding seat part with regard to vibrations with great Amplitude (and small frequency) can be designed. The corresponding seat part itself takes over then only the suspension of the seat with regard to vibrations with smaller amplitude.

In a preferred embodiment the spring force applied by the spring device is adjustable, optionally electronically controlled, especially in dependence of the respective lane, the speed of travel and, if applicable the weight of the person sitting on the seat. So it depends Road, Speed etc. a softer or harder suspension adjustable.

The spring device is preferred integrated in the actuator, e.g. by a corresponding spring element is arranged on one of the two components of the adjusting member. The suspension can also be designed as a pneumatic suspension, wherein the two components of the adjusting element in the manner of a piston and interact with a cylinder and are sprung.

The spring device causes the two components of the adjusting member only against the effect the spring force are displaceable to each other, so that shocks through sprung compensating movements of the two components of the adjusting member can be caught.

A motor vehicle seat with an adjustment device according to the invention is characterized by the features of claim 30.

This can be, in particular act a motor vehicle seat in which the front and / or rear End of the seat pan (holder for the Seat cushion) by two ischial legs (one each both long sides of the corresponding seat) is supported. In particular, the rear ischium in the manner of an adjusting member according to the invention be trained.

Other features and advantages of the Invention will become apparent in the following description of an embodiment become clear from the figures.

Show it:

1 - A first embodiment of an adjustment lever designed as a seat leg for a motor vehicle seat, which is used to adjust the position of the seat pan and to absorb crash energy;

2 - a first modification of the ischium 1 with regard to the adjusting device for adjusting the length of the adjusting member for adjusting the position of the seat pan;

3 - A second modification of the adjusting member 1 with regard to the adjusting device for adjusting the narrowness of the adjusting member;

4 - A modification of the adjusting member 1 with regard to the formation of a deformation element for the absorption of crash energy;

5a to 5c - A modification of the adjusting member 4 ;

6 - A schematic representation of a Motor vehicle seat with a pair of rear seat legs, which are designed to adjust the position of the seat pan and to absorb crash energy.

In 6 a motor vehicle seat is shown, the seat structure of which consists of a seat pan W and a backrest R. The seat pan W is articulated on a seat side part S and serves to receive a seat cushion and the backrest R is articulated on the seat pan W and serves to receive a backrest cushion.

A longitudinal rail guide is assigned to the seat structure, the first rail U (bottom rail) to be arranged from the body and one regarding the first rail in the vehicle's longitudinal direction x slidable second rail O (top rail).

The seat side part S is with the Upper rail O of the longitudinal rail on the one hand via a connected front seat leg B, which is integral to the seat side part S is formed and pivotable about an axis A on the top rail O is articulated. On the other hand, the seat side part S is with the top rail O over a rear seat leg connected in the form of an adjustment lever V, around an axis A ', A "swiveling both on the seat side part S and on the top rail O is articulated. That axis A ', over which the adjusting lever V is articulated on the seat side part S, serves at the same time to accommodate a belt buckle G, on which in a Crash case can attack significant crash forces.

In the event of a front crash, it will open seated vehicle occupant pressed forward into the belt, so that on the buckle G and accordingly on the adjusting lever V forces F act forwards / upwards.

The reverse is the case of a rear-end crash a vehicle occupant on the seat to the rear / down against the seat pan W and the backrest Pressed R, so that corresponding to the seat structure and the adjustment lever V. personnel H act backwards / downwards.

In 6 of the seat construction with the associated seat side part S, with the seat legs B and V and the rail longitudinal guide O, U, only the one long side can be seen. On the other long side of the seat, a longitudinal rail guide O, U, a second seat side part S and associated seat legs B, V are arranged in a corresponding manner. In other words, the seat side part S, the longitudinal rail guide O, U and the seat legs B, V are each arranged in pairs on both long sides of the seat construction R, W. In particular, there are two rear adjusting levers V and two front seat legs B, via which a seat side part S is connected to an associated longitudinal rail guide O, U.

1 shows a first embodiment of a rear seat leg arranged as an adjustment lever V, via which the in 6 The seat side part shown can be connected in an articulated manner to the upper rail O of a longitudinal rail guide.

The adjustment lever V comprises two components 1 . 2 in the form of lever parts, one of which is a lever part 1 the other lever part 2 encompasses tubular.

The one lever part 1 is formed by a U-shaped element in cross section 10 that on an extension 11 a depository 12 in the form of a bearing opening, which enables a pivotable arrangement of the adjusting lever V on a seat or motor vehicle assembly and the one tubular section 15 picks up the fixed with the U-shaped element in cross section 10 is connected and at its the U-shaped element 10 opposite end is angled inwards.

On the inner wall of the tubular section 15 of the first lever part 1 is a deformation element 5 arranged that from an annular deformation body 50 exists, which extends along the longitudinal direction L of the adjusting lever V.

The first lever part 1 is a second lever part 2 assigned to the adjustment lever V, which consists of an outer tubular (essentially hollow cylindrical) and an inner tubular (essentially hollow cylindrical) element 20 . 25 consists. The second lever part 2 is longitudinally displaceable with respect to the first lever part 1 guided and engages with an end section designed as a collar 26 of its inner element 25 into the interior of the tubular first lever part 1 on. Because of the widened design of said end section 26 as a collar, the second lever part is prevented 2 from the first lever part 1 can be brought out. Because a corresponding movement of the second lever part 2 with respect to the first lever part 1 is through the federal government 26 of the second lever part 2 and the angled end portions (provided with a seal D) 16 one end of the first lever part 1 prevented.

The one from the tubular element 15 of the first lever part 1 enclosed cavity in which the second lever part 2 with a widened end section designed as a collar 26 is formed forms a chamber K, which can be filled with a gas to create a pneumatic suspension, so that the two lever parts 1 . 2 cooperate resiliently like a piston-cylinder unit. The available travel 1 is determined by the maximum distance between the collar 26 of the second lever part 2 from the deformation element 5 ,

If there is a crash due to a force acting on the adjusting lever V, which acts along its longitudinal direction L and tends to have the second lever part 2 in the tubular section of the first lever part 1 to push in, and that beyond the available maximum travel a, so the federal government 26 of the second lever part 2 in engagement with the deformation element 5 of the first th lever part 1 , Such a force H acts in particular when the occupant is pressed with great energy against the seat pan and the backrest in a rear-end crash, so that correspondingly large forces act on the adjusting lever V and tend to have the second lever part 2 in the first lever part 1 push in.

Here the deformation element 5 in a defined manner, according to the construction and design of the deformation element 5 , deformed and on the lever parts 1 . 2 acting kinetic energy converted into deformation energy.

Accordingly, the adjustment lever takes over V as a seat leg both the function of a suspension of the Seat as well as the function of absorption of crash energy that occurs especially in a rear-end crash. This will make the seat construction itself at least in part from the requirement of absorption of Crash energy is relieved and can therefore be lighter and more compact be formed. About that In addition, the seat upholstery is at least partially functional the damping of Relieves vibrations and can therefore also be formed more easily become.

As a result, there are two requirements to a motor vehicle seat, the fulfillment of which usually significantly Weight and space requirements of the seat, in an adjustment lever (seat leg) summarized where this with a significantly lower need for Weight, space and components can be realized. This will make the seat construction overall lighter, cheaper and more compact.

In the present case, the adjusting lever V is still an adjusting device 4 assigned, with which the length of the adjusting lever V can be varied along its direction of extension L. This is the second lever part 2 telescopically designed and encloses a longitudinally movable element 3 , which is a lead screw 30 acts on their the first lever part 1 opposite end of an extension 31 with a warehouse opening 32 is designed for pivotable articulation of the adjusting lever V on a seat or motor vehicle assembly.

The longitudinally displaceable in the second lever part 2 arranged spindle 30 is as an adjustment device 4 a preferably driven by an electric motor, in a bulge 23 of the second adjustment part 2 stored snail 41 assigned, the output side with a rotatable but axially immovable spindle nut 42 cooperates, which in turn with an external thread 43 the spindle 30 is engaged. By operating the adjusting device 4 By means of a drive provided for this purpose, in particular in the form of an electric motor, the spindle can thus 30 be moved in the longitudinal direction L of the adjusting lever V to adjust its length. This allows the position of the seat pan connected to a floor-mounted vehicle assembly via the adjustment lever V, in particular the seat height, to be adjusted.

Due to the articulated articulation of the adjustment lever V via corresponding bearing openings 11 . 31 On the seat pan as well as on the top rail of a longitudinal rail guide, the adjusting lever V simultaneously performs a pivoting movement when the length changes. A defined adjustment kinematics can thus be selected and defined by appropriate arrangement and design of the adjustment lever and of its bearing axes.

2 shows a modification of the adjustment lever V. 1 , the difference in the design of the adjusting device 4 to adjust the length of the adjustment lever V. According to 2 includes the setting device 4 one in a bulge 23 of the second adjustment part 2 stored gear 45 with a spline 46 in the second lever part 2 longitudinally displaceable element 3 interacts.

In this exemplary embodiment of an adjusting lever V, a change in length is achieved by means of a gear wheel 45 causes associated drive, which may in particular be a manual drive, such as a so-called manual seat height adjustment (MSH).

3 shows a further modification of the adjustment lever 1 , the difference being that the longitudinally displaceable in the second lever part 2 arranged spindle 30 a spindle nut 44 is assigned, which is not driven by a further gear element, such as a worm, but which is only provided for the one-time adjustment of the length of the adjustment lever V when the corresponding seat adjustment device is installed. That is, the mother 44 there is no associated drive device which can be actuated or triggered by the seat and which would allow a seat user to vary the length of the adjusting lever V. Instead, the mother points 44 for example, only an additional external thread, which is used for a one-time adjustment of the length of the adjustment lever V during assembly of the corresponding seat adjustment device. Such an arrangement can be provided, for example, in the case of rear seats or front passenger seats which should not have a seat height adjustment.

4 shows a modification of the adjustment lever from the 1 to 3 with regard to the formation of the deformation element 5 , According to 4 there is the deformation element 5 of two in the longitudinal direction L of the adjusting lever V on the inside of the first lever part 1 Deformation areas arranged one behind the other 51 . 52 , These have a defined distance b from one another along the longitudinal direction L of the adjusting lever V.

Between those on the first lever part 1 intended deformation areas 51 . 52 of the deformation element 5 is the second lever part 2 in the region of its widened end designed as a collar 26 guided. In a rear-end crash, in which the Ver Actuating lever V forces H, which have the tendency to shorten the adjusting lever V, the second adjusting part comes into play 2 in the area of his covenant 26 with the first deformation area 51 of the deformation element 5 engages so that the kinetic energy caused by the rear-end crash is converted into deformation energy. Conversely, in the event of a front crash in which the basic forces F acting on the corresponding vehicle seat tend to lengthen the adjusting lever, the second lever part occurs 2 in the area of its widened section 26 with the second deformation area 52 of the deformation element is engaged so that the kinetic energy generated in a front crash can also be converted into deformation energy.

The distance between the two deformation areas 51 . 52 along the longitudinal direction L of the adjusting lever V defines the spring travel for movements of the second lever part 2 relatively to the first lever part 1 is available to compensate for vibrations. This travel corresponds to the distance b between the two deformation areas 51 . 52 reduced by the width of the federal government 26 of the second lever part 2 ,

The 5a to 5c show a modification of the adjustment lever V. 1 , according to which the first lever part consists of two separate lever elements 1 . 1' consists of the structure of each in 1 correspond to the first lever part described, with a cross-sectionally U-shaped element 10 respectively. 10 ' that on an extension 11 . 11 ' a depository 12 . 12 ' has in the form of a bearing opening and a tubular portion 15 . 15 ' with an angled end section 16 . 16 ' takes up a section on the inner wall 50 or 50 'of a deformation element 5 is arranged. Each of the two storage locations 12 . 12 ' serves to link the adjusting lever to a seat or motor vehicle assembly, so that an arrangement according to 6 results. In each of the two elements 1 . 1' the first lever part is also a spring element 6 . 6 ' in the form of a coil spring.

The two elements 1 . 1' the first lever part of the adjusting lever are in a second lever part 2 with a tubular base body 20 longitudinally displaceable (axially along the longitudinal axis L of the tubular base body 20 slidably) stored.

An adjusting device is used to adjust the length of the adjusting lever V. 4 which compare one by a suitable drive (e.g. by means of a Bowden cable 5b ) driven and in a bearing 24 of the second lever part 2 stored gear 47 includes. This gear 47 drives a coaxial threaded spindle connected to the gear wheel 30 on whose external thread 43 in that of the two elements 1 . 1' of the first lever part enclosed cavities each with a rotationally fixed to the corresponding element 1 . 1' arranged spindle nut 49 is engaged. By turning the gear 47 . 48 in one direction or another, with the threaded spindle 30 together with the gear 47 turns, the spindle nuts move 49 in the axial direction L towards or away from each other, the respective element 1 . 1' of the first lever part is taken along, corresponding to a shortening or lengthening of the adjusting lever V.

The two spindle nuts 49 are by means of the spring elements 6 . 6 ' in the form of coil springs in the respective element 1 . 1' of the first lever part, which in turn is a resilient mounting of the first lever part 1 . 1' with respect to the second lever part 2 of the adjustment lever.

The two spring elements can in their spring action be very different to a to enable optimal shock absorption, with a view to optimizing seating comfort for vehicle occupants. Furthermore, one of the two spring elements can optionally be used can also be dispensed with entirely if one with only one spring element sufficient suspension is achieved.

A spring element in the form of a coil spring can also be used in the 1 to 4 adjustment levers shown can be used instead of pneumatic suspension.

Act on the in 5a Adjusting lever shown as a result of a rear-end crash, strong forces which have the tendency to compress the adjusting lever V in the longitudinal direction L, and which in this case have a specific, predeterminable spring travel 2 * a of the spring elements 6 . 6 ' overcome, so the spindle nuts get 49 with the two sections 50 . 50 ' of the deformation element 5 engaged so that with the relative movement of the two lever parts 1 . 2 combined kinetic energy in deformation energy of the deformation element 5 is implemented.

An important difference between the arrangement 4 and the arrangement from the 5a to 5c is that the in 4 adjustment lever V shown the two sections 51 . 52 of the deformation element 5 on the one hand to absorb crash energy in a rear-end crash (section 51 of the deformation element 5 ) and on the other hand to absorb crash energy in a front crash (section 52 of the deformation element 5 ) serve while in the 5a to 5c adjustment lever V shown both sections 50 . 50 ' of the deformation element 5 serve to absorb crash energy in a rear-end crash. Accordingly, both spring elements act in this embodiment 6 . 6 ' a shortening of the adjustment lever V.

Claims (31)

Seat adjustment device for a motor vehicle Seat for adjusting the position of a seat part with respect to a motor vehicle assembly, with an elongated adjusting member which a) is articulated on the one hand on the seat part and on the other hand on the motor vehicle assembly and b) comprises two components which can be displaced relative to one another along the longitudinal direction of the adjusting member, characterized in that the adjusting member (V) a deformation element ( 5 ) which, when the two components move ( 1 . 1'; 2 ) of the adjusting element (V) to one another beyond a predefinable minimum distance with one of the two components ( 1 . 1'; 2 ) engages and is deformable in such a way that the relative movement of the two components ( 2 ) associated kinetic energy is at least partially converted into deformation energy. Seat adjustment device according to claim 1, characterized in that a movement of the two components ( 1 . 1'; 2 ) counteracts an elastic force to each other, so that the deformation element ( 5 ) only becomes effective when a predeterminable travel is exceeded. Seat adjustment device according to claim 1 or 2, characterized in that a movement of the two components ( 1 . 1'; 2 ) to each other, which exceeds the predeterminable minimum distance, is only possible under the action of a minimum force on one of the two components, with a suspension area preferably being designed for this so that the component ( 2 ) only when the minimum force with the deformation element is exceeded ( 5 ) engages. Seat adjustment device according to one of the preceding claims, characterized in that the deformation element ( 5 ) only with a relative movement of the two components ( 1 . 1'; 2 ) along a first direction (H) with the assigned component ( 2 ) engages. Seat adjustment device according to one of claims 1 to 3, characterized in that with a relative movement of the two components ( 1 . 2 ) along any of two opposite directions (F, H) the deformation element ( 5 ) with the assigned component ( 2 ) engages. Seat adjustment device according to one of the preceding claims, characterized in that the deformation element ( 5 ) on one of the two components ( 1 . 1'; 2 ) is arranged. Seat adjustment device according to claim 6, characterized in that the deformation element on the component ( 1 . 1' ) is attached. Seat adjustment device according to claim 6, characterized in that the deformation element ( 5 ) on the component ( 1 . 1' ) is molded on. Seat adjustment device according to one of the preceding claims, characterized in that a component ( 1 . 2 ) the other component ( 2 . 1 ) surrounds tubular. Seat adjustment device according to one of claims 6 to 8 and claim 9, characterized in that the deformation element ( 5 ) on the outer or inner component ( 1 . 1' ) is arranged. Seat adjustment device according to claim 9 or 10, characterized in that the inner component ( 1 . 1'; 2 ) with regard to the outer component ( 2 ; 1 . 1' ) is movable. Seat adjustment device according to one of the preceding claims, characterized in that the deformation element ( 5 ) two deformation areas spaced apart from one another along the direction of extension of the adjusting member (V) ( 50 . 50 '; 51 . 52 ) having. Seat adjustment device according to one of the preceding Expectations, characterized in that the seat part (W) by a receptacle for the seat cushion a motor vehicle seat is formed. Seat adjustment device according to one of the preceding Expectations, characterized in that the motor vehicle assembly (O) by a floor assembly of a motor vehicle is formed. Seat adjustment device according to one of the preceding Expectations, characterized in that the adjusting member (V) by a seat leg a motor vehicle seat is formed. Seat adjustment device according to one of the preceding Expectations, characterized in that the adjusting member (V) on the seat part (W) and / or the motor vehicle assembly (O) pivotally articulated is. Seat adjustment device according to one of the preceding claims, characterized in that the adjusting member (V) has an adjusting device ( 4 ) is assigned to adjust the length of the adjusting member (V). Seat adjustment device according to claim 17, characterized in that the adjusting device ( 4 ) is designed for actuation by a seat user. Seat adjustment device according to claim 17, characterized in that the adjusting device ( 4 ) is designed for a fixed presetting of the length of the adjusting member (V) when installing the seat adjustment device. Seat adjustment device according to one of claims 17 to 19, characterized in that the adjusting device ( 4 ) is designed as a manual setting device. Seat adjustment device according to one of claims 17 to 19, characterized in that the adjusting device as a power-operated, in particular electrical, adjusting device is formed. Seat adjustment device according to one of claims 17 to 21, characterized in that the adjusting device ( 4 ) has a spindle gear or a gear transmission for adjusting the length of the adjusting member. Seat adjustment device according to one of the preceding claims, characterized in that for adjusting the length of the adjusting member (V) one of the two components ( 1 . 2 ) is telescopic or the two components ( 1 . 1'; 2 ) are shifted towards each other. Seat adjustment device according to one of the preceding Expectations, characterized in that the adjusting member (V) has a spring device is assigned so that the seat part (W) is resilient via the adjusting member (V) can be connected to the motor vehicle assembly (O). Spring device according to claim 24, characterized in that the spring device is integrated in the adjusting member (V). Spring device according to claim 24 or 25, characterized characterized that the spring device as a pneumatic suspension is trained. Spring device according to claim 24 or 25, characterized in that the spring device is a spring element arranged on one of the two components ( 6 . 6 ' ) includes. Seat adjustment device according to one of Claims 24 to 27, characterized in that the spring device displaces the two components ( 1 . 2 ) of the adjusting member (V) counteracts each other along at least one direction, so that the two components ( 1 . 2 ) can only be moved along that direction against the effect of the spring force. Seat adjustment device according to claim 12 and one of claims 24 to 28, characterized in that the distance (b) between two deformation areas ( 51 . 52 ) Of the deformation element ( 5 ) determines the travel. Motor vehicle seat with a seat adjustment device according to one of the preceding claims. Motor vehicle seat according to claim 30 with a receptacle (W) for a seat cushion, each over at least a front ischium (B) and a rear ischium (V) with a Motor vehicle assembly (O) is connected, the rear seat leg as an actuator according to the feature of claim 1 is formed.