HEBEL F?R EINEN FAHRZEUGSITZ

Abstract

It is provided a lever for a vehicle seat, comprising two bearing portions for pivotally connecting the lever to a further component in each case; a carrier element via which forces can be transmitted between the bearing portions; a displacement element on which one of the bearing portions is provided; and an elongate guide portion which is blocked in an initial position by a deformation portion so that the displacement element is fixed relative to the carrier element, wherein the deformation portion can be deformed by the action of forces acting between the bearing portions such that the guide portion is released and the displacement element is displaceable relative to the carrier element.

Claims

1. Lever for a vehicle seat, comprising: two bearing portions for pivotally connecting the lever to a further component in each case, a carrier element, via which forces can be transmitted between the bearing portions, a displacement element, on which one of the bearing portions is provided, and an elongate guide portion, which is blocked in an initial position by a deformation portion so that the displacement element is fixed relative to the carrier element, wherein the deformation portion is deformable by the action of forces acting between the bearing portions such that the guide portion is released and the displacement element is displaceable relative to the carrier element.

2. The lever according to claim 1, wherein the guide portion is formed on the displacement element.

3. The lever according to claim 1, wherein the carrier element is connected to the displacement element via a fastening part.

4. The lever according to claim 3, wherein the fastening part extends through an opening of the carrier element and/or an opening in the guide portion.

5. The lever according to claim 4, wherein the opening is formed in the guide portion in the form of a slotted guide.

6. The lever according to claim 5, wherein at least one of for fixing the displacement element relative to the carrier element, the opening in the guide portion is at least partially closed by the deformation portion in the initial position and the slotted guide is tapered along a deformation path.

7. (canceled)

8. The lever according to claim 1, further comprising a forming portion having a step that acts in a deforming manner on the deformation portion by the action of the forces acting between the bearing portions.

9. The lever according to claim 8, wherein the forming portion is formed on an inner side of the carrier element.

10. (canceled)

11. The lever according to claim 1, wherein as a result of a deformation of the deformation portion releasing the guide portion, the displacement element is displaceable relative to the carrier element along a deformation path predetermined by the guide portion, wherein the displacement element comprises a rigid end stop that limits the deformation path.

12. The lever according to claim 1, wherein a total length of at least one or the at least one deformation path corresponds to at least 1/10.

13. The lever according to claim 1, wherein the carrier element is configured as a hollow carrier with an interior, wherein the deformation portion is arranged in the initial position in the interior of the carrier element.

14. The lever according to claim 1, wherein the bearing portions are outside of the deformation portion.

15. The lever according to claim 1, wherein the carrier element comprises the other of the two bearing portions

16. The lever according to claim 1, wherein the lever comprises a further displacement element on which the other of the two bearing portions is provided.

17. The lever according to claim 16, further comprising a further elongate guide portion, which is blocked in an initial position by a deformation portion so that the further displacement element is fixed relative to the carrier element, wherein the deformation portion can be deformed by the action of forces acting between the bearing portions such that the further guide portion is released and the further displacement element is displaceable relative to the carrier element.

18. The lever according to claim 17, wherein the deformation portion of the displacement element and the deformation portion of the further displacement element have different material properties.

19. A vehicle seat, comprising at least one lever according to claim 1, and the two components to which the bearing portions of the lever are pivotally connected.

20. The vehicle seat according to claim 19, wherein a seat part of the vehicle seat is mounted on a seat base of the vehicle seat via the at least one lever so as to be movable relative to the seat base.

21. The vehicle seat according to claim 20, wherein the vehicle seat has a seat height adjustment for adjusting a seat height of the seat part relative to the seat base, wherein the at least one lever is a component of the seat height adjustment.

22. The vehicle seat according to claim 21, wherein the at least one lever is a front lever of the seat height adjustment and the seat height adjustment further comprises a rear lever arranged, in comparison therewith, closer to a backrest of the vehicle seat, wherein the front lever is adjustable from the initial position to a released position in the event of an accident by tensile loads acting on the bearing portions.

Description

[0047] The attached figures illustrate exemplary possible embodiment variants of the proposed solution.

[0048] In the figures:

[0049] FIG. 1A shows a perspective representation of a first embodiment of a lever having a carrier element and a displacement element in an initial position;

[0050] FIG. 1B shows a perspective representation of a rear view of the lever from FIG. 1A;

[0051] FIG. 2 shows a perspective representation of the lever from FIG. 1A in a released position;

[0052] FIG. 3 shows a side view of a second embodiment of the lever;

[0053] FIG. 4 shows a side view of a third embodiment of a lever having the carrier element and two of the displacement elements;

[0054] FIG. 5 shows a perspective representation of a fourth embodiment of a lever having the carrier element and two of the displacement elements in coaxial arrangement;

[0055] FIG. 6 shows a perspective representation of a fifth embodiment of a lever having the carrier element and two of the displacement elements in parallel arrangement;

[0056] FIG. 7 shows a side view of a sixth embodiment of a lever having a two-part carrier element, two of the displacement elements and a connecting element;

[0057] FIG. 8 shows a side view of a seventh embodiment of a lever having the carrier element with a forming portion in the initial position;

[0058] FIG. 9 shows a side view of an eighth embodiment of a lever having the carrier element with the forming portion and having the displacement element with two deformation portions in the initial position;

[0059] FIG. 10 shows a side view of the lever from FIGS. 8 and 9 in the released position;

[0060] FIG. 11A shows a side view of a vehicle seat having a seat base, a seat part and a seat height adjustment with a lever in the initial position;

[0061] FIG. 11B shows a side view of the vehicle seat according to FIG. 11A with the lever in the released position; and

[0062] FIG. 11C shows a detailed view of the lever from FIG. 11A mounted on the vehicle seat.

[0063] FIGS. 1A and 1B show a lever 1A with two bearing portions 11A, 11B for pivotally connecting the lever 1A to a further component in each case, a carrier element 3A, via which forces can be transmitted between the bearing portions 11A, 11B, and a displacement element 2A, which has one of the bearing portions 11A, 11B and an elongate guide portion 22A. In an initial position of the lever 1A, the guide portion 22A is blocked by a deformation portion 23A, in the present case completely obstructed, such that the displacement element 2A is fixed in its position relative to the carrier element 3A against a translation thereto. In this case, the deformation portion 23A can be deformed by the action of forces acting between the bearing portions 11A, 11B in such a way that the guide portion 22A is released and the displacement element 2A can be moved with the guide portion 22A relative to the carrier element 3A along a deformation path S1 predetermined by the guide portion 22A.

[0064] The carrier element 3A according to FIGS. 1A and 1B is configured as a hollow body; by way of example, with a substantially rectangular cross-section. The hollow body encloses an interior 32, which is open at each of two opposite end portions of the carrier element 3A. In the area of one of the end portions of the carrier element 3A, the bearing portion 11B is arranged for pivotally bearing the lever 1A on a component. This bearing portion 11B is formed in the present case by a bearing sleeve arranged at a through-opening in the carrier element 3A.

[0065] The bearing portion 11A arranged on the displacement element 2A projects through the other of the two end portions of the carrier element 3A. The bearing portion 11B and the bearing portion 11A have the first distance L1 between each other. This bearing portion 11A of the displacement element 2A is configured in the form of a through-opening in the displacement element 2A. The bearing portions 11A, 11B each have a cylindrical through-opening for forming a pivot connection. Here, the corresponding cylinder axes are oriented parallel to each other.

[0066] The guide portion 22A of the displacement element 2A is arranged in the interior 32. Along a longitudinal extension axis L2A of the displacement element 2A between the guide portion 22A and the bearing portion 11A, the displacement element 2A is connected to the carrier element 3A via a fastening part 4 in the form of a bolt. The fastening part 4 is fastened on the carrier element 3A. The fastening part 4 extends through an opening 31A in the carrier element 3A and an opening in the displacement element 2A. As will be explained below with reference to FIG. 2, the opening in the displacement element 2A is formed by a slot, which is otherwise closed by the deformation portion 23A. The deformation portion 23A extends on the side facing away from the bearing portion 11A from the opening (not shown) in the guide portion 22A along the longitudinal extension axis L2A.

[0067] Thus, the fastening part 4 can be moved relative to the displacement element 2A by a tensile load introduced into the bearing portion 11A and exceeding a threshold value along the deformation path S1 with simultaneous deformation of the deformation portion 23A. This allows the lever 1A to be extended telescopically. In the embodiment shown, the deformation portion 23A has an alternating material thickness along the deformation path S1. This reduces the strength of the deformation portion 23A relative to the guide portion 22A and/or the bearing portion 11A.

[0068] The deformation path S1 is limited (on a side facing away from the fastening part 4 in the initial position) by an end stop 24. For guiding the displacement element 2A on the carrier element 3A, the displacement element 2A has, on its side facing away from the bearing portion 11A, a guide element 25 that rests against the inside of the interior 32 and is guided thereon. In the embodiment of the lever 1A shown in FIGS. 1A and 1B, the guide element 25 is formed as a plastic overmolding. In the embodiment shown in FIGS. 1A and 1B, the guide portion 22A closed with the deformation portion 23A occupies substantially the entire length between the fastening part 4 and the end stop 24 (with the guide element 25).

[0069] The deformation portion 23A is arranged between the bearing portions 11A, 11B.

[0070] The bearing portions 11A, 11B each define a pivot axis of the lever 1A. The deformation portion 23A is thus located between the pivot axes. The pivot axes are arranged outside of the deformation path S1.

[0071] FIG. 2 shows the lever 1A in the embodiment from FIGS. 1A and 1B in a released position. Accordingly, with respect to FIGS. 1A and 1B, the displacement element 2A is moved along the longitudinal extension axis L2A of the displacement element 2A by a tensile force introduced into the bearing portion 11A with respect to the other bearing portion 11B. Here, the fastening part 4 rests against the end stop 24 of the displacement element 2A. By moving the displacement element 2A, the fastening element 4 is guided along the deformation path S1 while causing deformation of the deformation portion 23A shown in FIGS. 1A and 1B. As a result of the deformation of the deformation portion 23A, the aforementioned opening 21A in the displacement element 2A, which is configured as a slotted guide, is released in FIG. 2. The slotted guide is formed by two parallel webs 231, 232, which adjoin the bearing portion 11A of the displacement element 2A and are connected via the end stop 24 (and the optional guide element 25) on a side facing away from the bearing portion 11A of the displacement element 2A.

[0072] In the illustrated released position of the lever 1A, the bearing portion 11A of the displacement element 2A and the bearing portion 11B of the carrier element 3A have a second distance L2. This differs by the telescopic displacement of the displacement element 11A relative to the carrier element 3A compared to the first distance L1 just by the deformation path S1.

[0073] Instead of being in the form of a hollow carrier, the carrier element 3A can also be solid, for example. Furthermore, the displacement element 2A may in principle have a deformation portion 23A that does not have alternating material thicknesses. A targeted reduction of the strength of the deformation portion 23A relative to the guide portion 22A and the bearing portion 11A is alternatively or additionally also possible by using different materials. Additionally or alternatively, the deformation portion 23A may be perforated in places to reduce strength and/or have a reduced material thickness compared to the webs 231, 232.

[0074] Optionally, the guide element 25 is formed integrally with the displacement element 2A. In particular, the guide element 25 and the displacement element 2A may be made of the same material.

[0075] FIG. 3 shows a lever 1B with two bearing portions 11C, 11D and a displacement element 2B, which (in the plane of the figure shown) is completely in line with the carrier element 3B. The displacement element 2B has the one bearing portion 11C. In the plane shown in FIG. 3, this bearing portion 11C is aligned with a slotted hole 33 of the carrier element 3B. In this case, the bearing portion 11C is arranged at an end portion of the slotted hole 33 facing the bearing portion 11D.

[0076] To connect the displacement element 2B to the carrier element 3B, the displacement element 2B has an opening 21B and the carrier element 3B has an opening 31B. Thus, the displacement element 2B and the carrier element 3B can be connected via a fastening part (not shown) (e.g. the fastening part 4 described above), which can extend through the aligned openings 21B, 31B. The opening 21B in the displacement element 2B extends through the guide portion 22B, which is in turn blocked with a deformation portion 23B. Thus, the displacement element 2B is fixed with respect to a displacement with respect to the carrier element 3B, provided that the loads introduced into the bearing portions 11C, 11D do not exceed a predetermined threshold.

[0077] By introducing tensile loads exceeding the threshold value into the bearing portions 11D, 11C, the displacement element 2B with the bearing portion 11C can be moved relative to the bearing portion 11D by the deformation path S2. In the process, the deformation portion 23B is plastically deformed. Furthermore, the deformation path S2 is limited by an end stop 24.

[0078] According to FIG. 3, one of the bearing portions 11C, 11D, in this case the bearing portion 11C of the displacement element 2B, is arranged between the other bearing portion 11D (here of the carrier element 3B) and the deformation portion 23B.

[0079] The lever 1D according to FIG. 4 has a carrier element 3C, which provides an opening 31B in areas of two opposite end portions for connecting the carrier element 3C to one of two displacement elements 2B respectively. Furthermore, this lever 1D comprises two displacement elements 2B, each of which is configured analogously to the displacement element 2B shown in FIG. 3.

[0080] Each of the displacement elements 2B shown can be mounted on the carrier element 3C via a fastening part 4 (not shown in FIG. 4), as described above. Thus, each of the fastening parts 4 can be moved along a respective deformation path S2 in the corresponding guide portion 22B by the introduction of loads exceeding the threshold value. The deformation paths S2 of the displacement elements 2B are each limited by an end stop 24. The deformation path of the lever 1D thus corresponds to twice the deformation path S2 of one of the displacement elements 2B. In a released position, the bearing portions 11C can thus be adjusted telescopically from the first distance L1 shown to a distance L2=L1+2?S2.

[0081] FIG. 5 shows a lever 1E with two coaxially arranged displacement elements 2C. Here, the carrier element 3D is again configured as a hollow body with a substantially rectangular cross-section. In the area of the end portions of the carrier element 3D, the latter has openings 31A through each of which a fastening part 4 extends. Each of the fasteners 4 secures a respective displacement element 2C to the carrier element 3D. Furthermore, each of the displacement elements 2C has a bearing portion 11A. In addition, each of the displacement elements 2C comprises a deformation portion 23C and a guide element 25, which are arranged entirely within an interior 32 of the carrier element 3D.

[0082] The fastening part 4 extends in each case through the guide portion 22C of one of the displacement elements 2C, wherein the guide portions 22C are blocked in the initial position by the deformation portions 23C. Thus, the displacement elements 2C are each fixed with respect to a displacement relative to the carrier element 3D as long as the applied loads do not exceed a threshold value. By applying loads exceeding the threshold value, both displacement elements 2C are movable along a longitudinal extension axis L2A of the displacement elements 2C with simultaneous deformation of the deformation portions 23A. In each case, a fastening part 4 is moved along a deformation path S3. Each of the deformation paths S3 is limited by an end stop 24. In addition, both displacement elements 2C are each guided by a guide element 25 on the carrier element 3D. The guide element 25 rests against the inside of the interior 32 of the carrier element 3D.

[0083] Differently formed deformation portions 23C enable different threshold values for one and the other displacement element 2C and thus a multi-stage release.

[0084] In the embodiment shown in FIG. 5, the longitudinal axes L2A of the displacement elements 2C are arranged coaxially to each other.

[0085] In contrast to this, FIG. 6 shows a lever 1F with two displacement elements 2D in a laterally offset, parallel arrangement. Accordingly, one of the two displacement elements 2D has a longitudinal extension axis L2A and the other of the two displacement elements 2D has a longitudinal extension axis L2B. The longitudinal extension axes L2A, L2B are arranged parallel to each other and spaced apart.

[0086] According to FIG. 6, the carrier element 3E is configured as a hollow body with a substantially square cross-section. In the area of the end portions of the carrier element 3E, the latter has an opening 31A through which a fastening part 4 extends. Each of the two fasteners 4 secures a respective displacement element 2D to the carrier element 3E. Furthermore, each of the displacement elements 2D has a bearing portion 11A, which protrudes from one of the end portions of the hollow body. In addition, each of the displacement elements 2D has a deformation portion 23D and a guide element 25. In the present case, these are arranged entirely within the interior 32 of the carrier element 3E.

[0087] In the present case, the deformation portions 23D of both displacement elements 2D have an identical material thickness D2. In alternative embodiments, the material thickness D2 may also vary between the deformation portions 23D. By way of example, this can be used to realize a multi-stage release behavior.

[0088] Each of the fastening parts 4 extends through one of the openings 21A in one of the guide portions 22D, wherein the guide portions 22D are closed except for the openings 21A by the deformation portions 23D. Thus, the displacement elements 2D are each fixed with respect to a displacement relative to the carrier element 3E as long as the applied loads do not exceed a threshold value. When the threshold value is exceeded, both displacement elements 2D are movable along the respective longitudinal extension axis L2A, L2B with simultaneous (or successive) deformation of the deformation portions 23D. In each case, a fastening part 4 is moved along a deformation path S4. Each of the deformation paths S4 is limited by an end stop 24. In the initial position, the two deformation portions 23D at least partially overlap each other.

[0089] Each of the displacement elements 2D forms one of two bearing portions 11A of the lever 1F. The deformation path of the lever 1F thus corresponds to twice the deformation path S4 of one of the displacement elements 2D. In the released position, the bearing portions 11D are thus adjusted telescopically from the first distance L1 shown to a second distance L2=L1+2?S4. In particular, twice the adjustment path S4 can be greater than the distance L1 of the bearing portions 11A in the initial position.

[0090] FIG. 7 shows a side view of a further embodiment of a lever 1G of the proposed solution. Thus, the carrier element 3F is made of two parts. The two parts of the carrier element 3F are connected to each other via a connecting element 5. For this purpose, the connecting element 5 is fixed to each of the two parts of the carrier element 3F by means of a fastening part 4.

[0091] The connecting element 5 has two connecting portions 51 and two longitudinally stretched guide portion 52. The guide portions 52 are each blocked by a deformation portion 53 in the initial position shown in FIG. 8, so that the connecting element 5 is fixed relative to each of the two parts of the carrier element 3F connected to the connecting element 5. The deformation portions 53 of the connecting member 5 may thereby be deformed by the action of forces acting between the bearing portions 11E of the lever 1G. This allows the guide portions 52 of the connecting element 5 to be released and the connecting element 5 to be moved with a respective one of the guide portions 52 relative to one of the connected parts of the carrier element 3F along the deformation path S5 predetermined by the respective guide portion 52.

[0092] In addition, a fastening part 4 is arranged on each part of the carrier element 3F in the area of the end portion facing away from the connecting element 5. Via this, the respective part of the carrier element 3F is connected to a displacement element 2E. Each of the two displacement elements 2E has a bearing portion 11E for bearing the lever on further components. Furthermore, each of the displacement elements 2E has a guide portion 22E and a deformation portion 23E blocking the guide portion 22E. The lever 1G thus comprises more than two (namely four in the present case) deformation portions 23E, 53.

[0093] Each of the two fastening parts 4 for connecting the parts of the carrier element 3F to the two displacement elements 2E extends through one of the guide portions 22E of one of the displacement elements 2E. The displacement element 2E is fixed by the deformation portions 23E respectively with respect to a displacement relative to the part of the carrier element 3F connected to the displacement element 2E, as long as the applied loads do not exceed a threshold value. When the threshold value is exceeded, both displacement elements 2E can be moved along the respective guide portion 22E with simultaneous deformation of the respective deformation portion 23E. In each case, a fastening part 4 is moved along the respective deformation path S2. Each of the deformation paths S2 is limited by an end stop 24. The deformation path of the lever 1G thus corresponds to the sum of all deformation paths S2, S5 of the displacement elements 2E and the connecting element 5. In a released position (not shown), the bearing portions 11C can thus be adjusted telescopically from the first distance L1 shown to a second distance L2=L1+2?S2+2?S5. Thus, a multi-step release behavior can be specified.

[0094] FIG. 8 shows a further possible embodiment of the proposed lever 1H. The opening 21C in the displacement element 2F is formed as a slotted hole and, in contrast to the embodiments shown in FIGS. 1A-7, is not closed by a deformation portion. The fastening part 4 can thus in principle be moved within the opening 21C. In order to fix the displacement element 2F with respect to loads that do not exceed a threshold value, the displacement element 2F is supported by at least one, in this case two, deformation portions 23E facing the carrier element 3G against a deformation portion 34 of the carrier element 3G, which is formed, by way of example, as two opposing steps. This blocks the guide portion 22E in the initial position shown in FIG. 8 (in particular against movement relative to the carrier element 3G)

[0095] Adjacent to the opposite steps, the fastening part 4 is connected to the carrier element 3G. If tensile loads exceeding the threshold value are introduced into the bearing portions 11A, 11B, the displacement element 2F can be moved relative to the carrier element 3G with deformation of the deformation portions 23E. In this case, the (in particular plastic) deformation takes the form of a displacement of the material of the deformation portions 23E of the displacement element 2F. By way of example, the material can be moved in the direction of the opening 21C, in particular compressed. During the displacement, the displacement element 2F is guided by the guide portion 22E on the fastening part 4. In particular, this can prevent the lever 1H from being retracted again after it has been released.

[0096] FIG. 9 shows an embodiment of the lever 1I, which essentially corresponds to the lever 1H shown in FIG. 8. In contrast to the lever 1H according to FIG. 8, the opening 21C of the displacement element 2F is closed by an additional deformation portion 23F (here: sectionally, alternatively completely). Thus, the lever 1I comprises a plurality of deformation portions 23E, 23F, specifically a plurality of types of deformation portions. 23E, 23F. If tensile loads exceeding the threshold value are introduced into the bearing portions 11A, 11B, the displacement element 2F can be displaced relative to the carrier element 3G only with deformation of both types of deformation portions 23E, 23F of the displacement element. The deformation portion 23F arranged in the opening 21C has the deformation path S7, which is shorter than the length of the deformation path S6 of the deformation portion 23E facing the carrier element 3G. In alternative embodiments, the deformation portions 23E, 23F may also have an inverse aspect ratio or be of equal length.

[0097] FIG. 10 shows the lever 1H shown in FIG. 8, and applies equally to the lever 1I shown in FIG. 9, in each case in the released position. Accordingly, the fastening part 4 abuts an end portion of the opening 21C of the displacement element 2F. Compared to FIGS. 8 and 9, the distance L2 of the bearing portions 11A, 11B is greater than the distance L1 of the bearing portions 11A, 11B in the initial position by the length of the deformation path S6. The deformation portions 23E, 23F are deformed by the displacement of the displacement element, wherein material moved by the deformation of the deformation portion 23F of the lever 1I covering the opening 21C in the initial position according to FIG. 9 is not shown in FIG. 10. It can be seen that the opening 21C has a smaller width (perpendicular to the direction of the deformation path S6) after the displacement element 2F has been extended than in the initial position. Due to deformation, the webs 231, 232 have a smaller distance to each other than in the initial position, at least in sections.

[0098] FIGS. 11A and 11B show a vehicle seat 6 having a seat base 61 arranged on a vehicle floor, a seat part 62 and a backrest 63. The seat base 61 is connected to the seat part 62 via a seat height adjustment 64 of the vehicle seat 6. The seat part 62 can be moved relative to the seat base 61. The seat height adjustment 64 comprises at least one front height adjustment lever 1A and a rear height adjustment lever 642. The height adjustment levers 1A, 642 each have two bearing portions, with which the height adjustment levers are respectively connected to the seat part 62 and the seat base 61.

[0099] By way of example only, the height adjustment lever 1A shown corresponds to the embodiment of the proposed lever 1A shown in FIGS. 1A, 1B and 2. In principle, the vehicle seat 6 and the seat height adjustment 64 shown can also comprise any other embodiment of the proposed lever 1A.

[0100] The seat base 61 has a front bearing point 611 on a front side facing away from the backrest 63, which defines a front pivot axis 612. Thus, the front height adjustment lever 1A hinged to the front bearing point 611 is pivotable about the front pivot axis 612. Furthermore, in a rear region facing the backrest, the seat base 61 has a rear bearing point 613 that defines a rear pivot axis 614. Thus, the rear height adjustment lever 642 hinged to the rear pivot axis 614 is pivotally mounted about the rear pivot axis 614.

[0101] Similarly, the seat part 62 has a front bearing point 621 with a front pivot axis 622 on a front side facing away from the backrest 63 and a rear bearing point 623 with a rear pivot axis 624 on a rear side facing towards the backrest 63. In this case, the front lever 1A, which is mounted on the front bearing point 621 of the seat part 62, can be pivoted about the front pivot axis 622. Furthermore, the rear height adjustment lever 642 is pivotable about the rear pivot axis 624.

[0102] In the embodiment shown in FIG. 11A, the front height adjustment lever 1A corresponds to the lever 1A shown in FIGS. 1A and 1B in the initial position. The front bearing points 611, 622 have the first distance L1 corresponding to the initial position. Except for the mounting portion 11A, the movement element 2A is completely accommodated by the carrier element 3A, which is configured as a hollow body. Thus, in particular, the deformation portion 23A is completely inside the carrier element 3A. The displacement element 2A and the carrier element 3A are held together by the fastening part 4 as explained above. In this case, a relative displacement of the displacement element 2A to the carrier element 3A is blocked by the deformation portion 23A as long as the loads introduced into the front height adjustment lever 1A do not exceed the corresponding threshold value.

[0103] FIG. 11B shows the vehicle seat shown in FIG. 11A after a telescopic displacement of the displacement element 2A relative to the carrier element 3A by the application of tensile loads 11 exceeding the threshold value. The front height adjustment lever 1A is thus in the released position. Here, the front bearing points 611, 621 of the front height adjustment lever 1A have the second distance L2. Due to the changed distance of the front bearing points 611, 621, the seat part 62 is pivoted relative to the seat base 61.

[0104] The second distance L2 in the released position corresponds to the sum of the first distance L1 in the initial position plus the deformation path S1. Corresponding to the previous explanations regarding the lever 1A according to the embodiment shown in FIGS. 1A-2, the fastening part 4 is moved along the guide portion 22A up to the end stop (not shown), compared to the initial position shown in FIG. 11A. The deformation portion 23A is plastically deformed or destroyed by compression.

[0105] FIG. 11C shows a detailed view of the front height adjustment lever 1A from FIG. 11A. The carrier element 3A encloses the interior 32, which is open towards both end portions of the carrier element 3A. In the area of one of the end portions of the carrier element 3A, the bearing point 11B for the pivotable bearing of the lever 1A is arranged on the front bearing point 611 of the seat base 61. For this purpose, a bearing pin engages through the opening of the bearing point 11B.

[0106] The bearing portion 11A of the displacement element 2A protrudes through the other of the two end portions of the carrier element 3A. The bearing portion 11A is hinged to the front bearing point 621 of the seat part 62in this case by means of a bearing pin passing through the opening of the bearing point 11A. The bearing portions 11A, 11B have the first distance L1 between each other.

[0107] The deformation portion 23A extends in the guide portion 22A along the longitudinal extension axis L2A.

[0108] Thus, the fastening part 4 can be moved relative to the displacement element 2A by a tensile load introduced into the bearing portion 11A and exceeding a threshold value along the deformation path S1 with simultaneous deformation of the deformation portion 23A. The deformation portion 23A has a material thickness alternating along the deformation path S1, in this case by means of rib-shaped weakenings parallel to each other. This reduces the strength of the deformation portion 23A relative to the guide portion 22A and the bearing portion 11A.

[0109] The use of the proposed lever 1A-1I as a component of a vehicle seat 6 is not limited to the specific embodiment of the vehicle seat 6 shown. Furthermore, the lever 1A-1I may be applied as one of many levers 1A-1I, or as the only lever 1A-1I of an adjustment mechanism of the vehicle seat 6. In principle, a plurality of levers 1A-1I can also be part of a vehicle seat 6 according to the proposed solution.

LIST OF REFERENCE NUMERALS

[0110] 1A-1I Lever [0111] 11A-11E Bearing portion [0112] L1 Distance of the bearing portions in the initial position [0113] L2 Distance of the bearing portions in the released position [0114] S1-S5 Deformation path [0115] 2A-2E Displacement element [0116] 21A, 21B Opening [0117] 22A-22F Guide portion [0118] 23A-23F Deformation portion [0119] 231, 232 Web [0120] 24 End stop [0121] 25 Guide element [0122] L2A, L2B Longitudinal extension axis [0123] D2 Material thickness [0124] 3A-3F Carrier element [0125] 31A, 31B Opening [0126] 32 Interior [0127] 33 Slotted hole [0128] 34 Forming portion [0129] 4 Fastening part [0130] 5 Connecting element [0131] 51 Connecting portion [0132] 52 Guide portion [0133] 53 Deformation portion [0134] 54 End stop [0135] 6 Vehicle seat [0136] 61 Seat base [0137] 611 Front bearing point [0138] 612 Front pivot axis [0139] 613 Rear bearing point [0140] 614 Rear pivot axis [0141] 62 Seat part [0142] 621 Front bearing point [0143] 622 Front pivot axis [0144] 623 Rear bearing point [0145] 624 Rear pivot axis [0146] 63 Backrest [0147] 64 Seat height adjustment [0148] 1A Front lever [0149] 642 Rear lever [0150] F Force