Adjustment device for vehicle seats and vehicle seats

Abstract

An adjustment device for a vehicle seat includes adjustment components that are adjustable relative to each other. A toothed rack is hinged to a first adjustment component, and a pinion is rotatably supported on a second adjustment component. The teeth mesh with the pinion to adjust the rack and move the two adjustment components relative to each other. A rack locking element is also fixed to the second adjustment component. During adjustment, the rack extends between the rack locking element and the pinion. A spring member extends as a separate assembly between the rack locking element and a spring locking element spaced apart from the rack locking element. The spring member has an arched portion facing the rack in an intermediate region between the rack locking element and the spring locking element. The arched portion abuts against the rack at a pressure point (P) under clamping force to preload the rack towards the pinion.

Description

Technical Field

[0001] The present invention relates to an adjustment device for a vehicle seat and a vehicle seat, the adjustment device being used to adjust the vehicle seat, particularly for height adjustment. Background Technology

[0002] Traditional vehicle seats typically feature adjustable seat components that can be adjusted in height and / or tilt. Seat components with a base are supported, for example, by a top rail in a manner that allows longitudinal movement within a bottom rail fixed to a base. The base of the seat component usually has two sides, connected laterally to each other by front and rear crossbeams or other structural components. These sides work in conjunction with rocker arms that can pivot relative to the top rail and the sides to achieve parallelogram adjustment of the seat component or vehicle seat. In vehicle seats that do not employ a longitudinally adjustable design, these rocker arms are correspondingly fixed to the base sides in other ways.

[0003] To adjust the vehicle seat, a rack hinged to the rocker arm, particularly the rear rocker arm, is used to adjust the rocker arm. The rack's teeth engage with a pinion fixed to the side. If the pinion is driven manually or electrically, specific adjustments to the seat components can be made. To prevent the rack from disengaging from the pinion, it typically extends between the pinion and an additional rack locking element. This rack locking element prevents the rack from being lifted upwards under significant forces, especially in the event of a collision.

[0004] DE 10 2016 001 564 A1 proposes that rack locking elements particularly have an upper contact arm with an elastic design. Therefore, the rack locking element is also designed as a spring member. This upper contact arm slides towards the top side of the rack via a radial clearance, or slides on the top side of the rack under preload, thereby compensating for tolerance-related intermediate clearances between the rack locking element and the rack, as the spring member preloads the rack towards the pinion.

[0005] In this case, the disadvantage is that the actual function of the rack locking element is combined with the function of the spring member used to preload the rack. Therefore, the design has low flexibility because it is essential to ensure that the rack is not lifted upwards under large forces, especially in the event of a collision. Consequently, the adjustment of the preload is limited, and the design has low adjustment flexibility. Furthermore, this variant cannot be combined with adjustment devices that use studs or similar components as rack locking elements.

[0006] DE 10 2017 206 994 B4 also describes the introduction of a movablely guided sliding element into the housing of the rack locking element. This sliding element is pre-tensioned by a tensioning device (spring member) and pressed against the top side of the rack. This pre-tensions the toothed rack towards the pinion. In this variation, the spring member is also integrated into the rack locking element, making the design less flexible. Summary of the Invention

[0007] Therefore, the object of the present invention is to provide an adjustment device for a vehicle seat, which enables the vehicle seat to be conveniently adjusted in a highly flexible and simple manner. Another object of the present invention is to provide a vehicle seat.

[0008] Therefore, according to the invention, a spring member, such as a leaf spring or similar spring, extends as a separate component between a rack locking element and an additional spring locking element spaced apart therefrom, the spring locking element also being directly or indirectly fixed to a second adjusting member, wherein the spring member has an arched portion or protrusion toward the rack in an intermediate region located between the rack locking element and the spring locking element, wherein the arched portion abuts against the rack (on a narrow surface) at a pressure point to preload the rack or teeth toward the pinion when a clamping force is formed.

[0009] This achieves the following advantages: when there is a tolerance-related or tolerance-dependent intermediate gap between the rack locking element and the rack, the rack is pushed away from the rack locking element, thus compensating for the clearance caused by the existing intermediate gap. This prevents the rack from striking the rack locking element and generating annoying noise when it is under load on the seat components or during vehicle seat operation. Particularly when the rack abuts against the pinion by its teeth during normal operation, a tolerance-related intermediate gap is formed, which is preferably less than 1 mm, and particularly less than 0.5 mm.

[0010] Because of the use of an independent spring component, a simple solution is provided, in which the clamping force can be flexibly matched to the corresponding vehicle seat or application. Furthermore, this solution can also be used as a rack and pinion locking element in conjunction with a conventional stud bolt. In this case, the retrofit cost is low because the spring component can be easily mounted onto the rack and pinion locking element or the stud bolt.

[0011] According to the invention, a separate component is used as the spring member, that is, the spring member is not part of the rack locking element itself. Therefore, in such an adjusting device, a rack locking element, for example, implemented as a double-ended bolt, ensures that the rack does not disengage from the pinion, especially under heavy loads. Unrelated to this function, according to the invention, a spring member is provided, which can be connected to the rack locking element in any manner via a first end region, to supplementarily achieve the function of pre-tensioning the rack towards the pinion.

[0012] To achieve the above solution, in addition to the rack and pinion locking element, a spring locking element is also provided, the spring member being attached to the spring locking element, for example, via a second end region. The spring locking element and the rack and pinion locking element are spaced apart, meaning the spring member is attached to functional units spaced a certain distance apart or separated from each other, so as to ensure, according to the invention, that the arched portion located therebetween can press against the rack. For this purpose, these locking elements, as functional units, can in principle be connected to each other, for example, via the sides of the base frame, as long as the required function according to the invention can be achieved.

[0013] The spring locking element ensures that the movement (locking) of the spring member is restricted on its other side (viewed from the arch), i.e., in the second end region, thereby forming a first elastic arm between the arch and the rack locking element (first end region) and a second elastic arm between the arch and the spring locking element. Both elastic arms are designed, through the material of the spring member, the position of the locking element, and the design of the arch, such that a specific clamping force is transmitted to the rack through a pressure point in the region of the arch, so as to preload the rack through the teeth toward the pinion.

[0014] In this case, preferably, during normal operation, the spring member rests only against the corresponding narrow face of the rack in the arched region without excessive force. The clamping force is set such that the rack does not contact the rack locking element during normal operation, thereby avoiding unwanted noise. Contact with the rack locking element only occurs under excessive force, especially in the event of a collision, in order to utilize the desired function of the rack locking element.

[0015] Furthermore, preferably, the spring member is movable or immovably held on the rack locking element, particularly disposed around and / or fixed to the rack locking element. This advantageously ensures variable fixation of the rack locking element, for example, on an existing stud bolt. Thus, for example, the spring member can be simply clamped to the stud bolt, wherein the spring member is then at least partially disposed around the stud bolt. Furthermore, if the spring member is disposed only around the stud bolt (without supplementary fixation), it is also advantageous to achieve the following: under load from the rack, the spring member can rotate about the bolt axis, thereby better conforming to the load.

[0016] The rack locking element implemented as a double-ended bolt can have a circular, elliptical, rectangular or similar cross-section and protrude vertically from the second adjusting member or from the side member accordingly in order to achieve a locking effect.

[0017] Furthermore, preferably, the spring member is a leaf spring that bends in the intermediate region between the rack locking element and the spring locking element to form an arch, wherein the leaf spring abuts against the rack at the pressure point in the region of the arch, applying a clamping force (towards the rack) to preload the rack towards the pinion. The arrangement around the rack locking element, the formation of the arch, and the setting of the clamping force can be achieved in a simple manner using a leaf spring.

[0018] Furthermore, preferably, the arched portion facing the rack is U-shaped or V-shaped or has an equivalent curved profile, which can be achieved simply by molding. In this case, it can also be equivalently configured by fixing a protrusion protruding towards the rack on the surface of the spring member, the protrusion being pressed against the narrow surface of the rack by the clamping force at the pressure point.

[0019] Furthermore, preferably, the spring locking element comprises a protrusion or connecting piece protruding from the second adjusting member (or its side or connected element), the protrusion or connecting piece being spaced a certain distance from or functionally separated from the rack locking element, and the spring member abutting against the protrusion or connecting piece under preload. This allows for simple locking of the spring's movement to generate preload, and preferably, the spring member is loosely abutting against the protrusion or connecting piece, i.e., without supplementary fixation, and / or the spring member is positioned around the protrusion or connecting piece in the second end region. Because the spring member used to generate preload is not necessarily fixed to these locking elements, it can slide along these locking elements, thereby compensating for changes in the force acting on the arched portion of the spring member. This avoids unnecessary preload on the spring member.

[0020] Therefore, preferably

[0021] - The spring member is arranged in a U-shape around the spring locking element via the second end region, thereby allowing the spring locking element to be fixed at the end side. Specifically, the spring member, for example, clamps the spring locking element in the form of a clip under stress, or...

[0022] - The spring member first departs from the rack from the arched portion, bends toward the rack in a curved region adjacent to the arched portion, and engages with a hook under preload in the second end region, thereby enabling alternative solutions for other requirements of the required space.

[0023] Furthermore, preferably, the connecting piece (spring locking element) is part of the first guiding element, wherein the first guiding element also has a guide plate connected to the connecting piece and parallel to the main surface of the rack, the guide plate laterally restricting the movement of the rack. In this way, the first guiding element can achieve a dual function (lateral guidance and preload of the spring member), thus eliminating the need for additional components.

[0024] Furthermore, preferably, the spring member also has at least one lateral guide rib, which is part of the second guide element, wherein the at least one guide rib is laterally bent on the spring member such that the at least one guide rib is parallel to the main surface of the rack, so as to restrict the movement of the rack laterally. Preferably, a bent guide rib can be provided on each side of the rack. The spring member can also advantageously perform a guiding function simultaneously, thus eliminating the need for additional components. However, in principle, such a lateral guiding device can also be combined with other guiding elements (e.g., a first guide element).

[0025] Furthermore, preferably, the pinion can be driven by an actuating device, which can be either electrically or manually operated. Therefore, the adjustment of the adjusting device can be achieved manually, for example by a (pump) rod, or electrically, for example by a motor. In this case, assume the adjusting device has a first adjusting member and a second adjusting member adjustable relative to the first adjusting member, wherein a toothed rack is hinged to the first adjusting member, and the pinion is rotatably supported on the second adjusting member, wherein the rack interacts with a spring member connected to the second adjusting member (loosely or firmly connected), the spring member preloading the rack toward the pinion, wherein the teeth of the rack mesh with the pinion, thereby adjusting the rack as the pinion rotates about its axis, wherein through this adjustment of the rack, the adjusting members can move relative to each other.

[0026] In this case, preferably, the adjusting device is adapted to adjust the height of the vehicle seat, wherein the first adjusting component is a rear rocker arm pivotally supported on the base side, and the second adjusting component is a side portion of the vehicle seat's base frame, wherein the rear rocker arm can pivot relative to the side portion via the movement of the rack, such that the base frame is adjusted, particularly along the height adjustment direction. Therefore, the adjusting device according to the invention can advantageously be used for height adjustment, wherein, during use, particularly when sitting on the seat component, in order to avoid disturbing noise, gaps are compensated based on tolerance-related intermediate clearances.

[0027] According to the present invention, a vehicle seat is also provided, having a base frame adjustable via a rocker arm supported on the side of a base. The base frame has sides and a crossbeam, and the base frame works in conjunction with an adjustment device. The vehicle seat can be arranged in a vehicle, for example, in a manner movable relative to a base via a top rail, in which case the rocker arm is connected to the base via the movable top rail; or the rocker arm can be fixed to the bottom of the vehicle in a manner that allows direct pivoting but prevents linear movement relative to the base. In both cases, disturbing noise is avoided during normal operation of the vehicle seat because the gap caused by the intermediate void can be compensated for by a spring member with appropriately adjusted clamping force. Attached Figure Description

[0028] The present invention will now be described in detail with reference to the embodiments. Wherein:

[0029] Figure 1 This is a diagram of a vehicle seat.

[0030] Figure 2 This is a first embodiment of the adjusting device according to the present invention;

[0031] Figure 3 , 4 Figures 5 and 6 are detailed drawings of the spring components in different embodiments; and

[0032] Figure 6 This is another embodiment of the regulating device according to the present invention. Detailed Implementation

[0033] Figure 1The base frame 1a of a vehicle seat 1 with an adjustment device 100 is schematically and partially shown, wherein seat components or cushions are typically housed in or contained within the base frame 1a. The vehicle seat 1 has a bottom rail 2 fixed to a base, and a top rail 3 is housed in the bottom rail in a longitudinally movable manner. Two rocker arms 5a and 5b (front and rear) are pivotally supported on the top rail 3, by which the height of the base frame 1a of the vehicle seat 1 can be adjusted relative to the top rail 3 in a parallelogram-like adjustment manner, and / or, depending on the situation, the tilt can also be adjusted. Here, as... Figure 1 As shown, the base frame 1a consists of at least two side sections 1b and two crossbeams 1c.

[0034] To adjust the chassis 1a, a curved rack 6 is hinged to at least one of the rear rocker arms 5b. During adjustment along the longitudinal direction X, the rack causes at least one rear rocker arm 5b to which the rack is hinged (serving as the first adjusting component of the adjusting device 100) to pivot, thereby adjusting the chassis 1a upwards or downwards at least along the height adjustment direction Z. Tilt adjustment can also be performed simultaneously. The other rocker arms 5a and 5b are automatically driven by the crossbeam 1c or side 1b of the chassis 1a, causing the seat components and backrest (not shown) of the vehicle seat 1 to rise or fall uniformly as a whole. In principle, the other rear rocker arm 5b of the vehicle seat 1 can also act directly with the rack in the same manner, through which pivoting motion (preferably synchronously) can also be introduced into the other rear rocker arm 5b.

[0035] The rack 6 is adjusted longitudinally X by means of teeth 7, which, according to the illustrated embodiment, are arranged on the bottom side 6a (lower narrow face) of the rack 6. A pinion 8 located below the rack 6 meshes with teeth 7. In this case, the pinion 8 is rotatably supported on the side 1b as a second adjusting member of the adjusting device 100, and can be adjusted relative to the first adjusting member (rear rocker arm 5b). Adjustment can be made via the operating device 10, i.e., the electric operating device 10a (see...). Figure 2 ), such as an electric motor, or a manual operating device 10b (see Figure 6 For example, the (pump) rod drives the pinion 8, thereby causing it to rotate.

[0036] In this way, the rack 6, which abuts against the pinion 8 via the teeth 7, can be adjusted longitudinally X according to the driving direction of the pinion 8, and this longitudinal movement can be introduced into at least one rear rocker arm 5b for height adjustment of the chassis 1a relative to the vehicle's base. The currently set height position (and, if necessary, the tilt position) can be maintained by a corresponding locking mechanism (not shown).

[0037] Furthermore, to prevent the rack 6 from disengaging from the pinion 8, a vertically protruding double-ended bolt 9 is also fixed to the side 1b as a rack locking element 20. In the illustrated embodiment, the rack locking element is located above the rack 6. That is, the rack 6 is guided through an area during its longitudinal adjustment, which is defined on the bottom side by the pinion 8 and on the top side by the double-ended bolt 9 or the rack locking element 20.

[0038] To reliably adjust rack 6 along the longitudinal direction X using this structure, the wheelbase D89 between the pinion shaft A8 of pinion 8 and the bolt shaft A9 of stud bolt 9 should be determined as precisely as possible. In this case, it is crucial to ensure not only that rack 6 does not get stuck between stud bolt 9 and pinion 8 (because wheelbase D89 is too small), but also that the wheelbase D89 between the two shafts A8 and A9 is not too large. If wheelbase D89 is too large, an intermediate gap 4 will be formed between the top side 6b (upper narrow face) of rack 6 and stud bolt 9. When the seat components are under load due to occupants or during vehicle operation, this intermediate gap may cause rack 6 to disengage from pinion 8 and collide with stud bolt 9 with its top side 6b. This could cause noise that occupants perceive as disturbing.

[0039] Due to manufacturing tolerances (pinion 8, support bolt 9, and rack 6), the formation of the intermediate gap 4 is unavoidable and must therefore be taken into account. Therefore, according to the invention, to avoid generating disturbing noise, an additional spring member 12 is provided, which, according to the illustrated embodiment, is implemented as a leaf spring 12a. However, the spring member 12 can also be other spring members with the same function, acting and positioning in a similar manner. The leaf spring 12a has an arched portion 14 in the intermediate region 13a, shown in the figure as a U-shaped arch. However, the arched portion 14 can also be a V-shaped design or have a similar curved profile, wherein in all cases, the arched portion 14 can be formed, for example, by bending the leaf spring 12a. The arched portion 14 faces the top side 6b of the rack 6, such that the leaf spring 12a abuts against the top side 6b of the rack 6 by means of the arched portion 14 and can slide on the top side in the event of longitudinal movement of the rack 6. The arched portion 14 can also be equivalently formed by a partial bulge of the leaf spring 12a in the middle region 13a toward the top side 6b of the rack 6.

[0040] Leaf spring 12a extends from the intermediate region 13a toward the stud bolt 9, wherein the first end region 13b of leaf spring 12a is guided around the stud bolt 9 at an angle greater than 270°. This holds leaf spring 12a to the stud bolt 9 at its end. Because of this guidance, leaf spring 12a is not additionally fixed to the stud bolt 9, thus allowing leaf spring 12a to rotate about the bolt axis A9 of the stud bolt 9. However, in other embodiments, leaf spring 12a may also be fixed to the stud bolt 9 in other ways (rotatably or non-rotatably) at its end.

[0041] Leaf spring 12a extends from the intermediate region 13a in another direction to the spring locking element 15, and the leaf spring loosely rests against the spring locking element under the action of preload. According to Figures 3 to 5 In the detailed drawing, the spring locking element 15 is composed of a protrusion 17 that protrudes vertically from the side portion 1b or an element fixed to the side portion. This protrusion prevents the leaf spring 12a from moving upward, thereby locking the spring member or leaf spring 12a. According to Figure 3 and Figure 5 The leaf spring 12a originates from the arched portion 14 in the intermediate region 13a, first extending upwards, then bending downwards in the curved region 13c adjacent to the intermediate region, and finally terminating in the second end region 13d. A hook 13e is arranged in the second end region 13d, which engages below the spring locking element 15 to prevent upward movement of the leaf spring 12a. According to... Figure 4 In this embodiment, the leaf spring 12a originates from the arched portion 14 of the intermediate region 13a and is guided below the spring locking element 15 without additional bending. The leaf spring 12a rests loosely against the spring locking element 15 under the preload of the abutment region 13f, and the spring locking element prevents the leaf spring 12a from adjusting upwards. The additional hook 13e is omitted in this embodiment.

[0042] according to Figure 6 In one embodiment, the spring locking element 15 is formed by a connecting piece 18a of a first guide element 18 protruding vertically from the side 1b. The second end region 13d of the leaf spring 12a is positioned in a U-shape around the connecting piece 18a protruding vertically from the side 1b of the guide element 15b, so as to secure the leaf spring 12a at its end and simultaneously prevent upward adjustment of the leaf spring 12a. The second end region 16b of the leaf spring 12a can also be positioned in a U-shape around, for example... Figure 4 The protrusion 17 shown is placed. The first guiding element 18 is used to restrict the movement of the rack 6 in the transverse Y direction or to guide the rack 6 laterally in order to prevent the rack 6 from disengaging laterally. For this purpose, a guide plate 18b parallel to the main surface 6c of the rack 6 is provided on the connecting piece 18a that protrudes vertically from the side 1b.

[0043] according to Figure 5Lateral guidance can also be achieved as follows: lateral guide ribs 19a, as second guide elements 19, are arranged in the first end region 13a of the leaf spring 12a below the double-ended bolt 9, preferably on both sides. As an integral part of the leaf spring 12a, these guide ribs are bent downwards, thereby located on the sides (substantially parallel to) the two main surfaces 6c of the rack 6. This also prevents the rack 6 from shifting laterally along the Y direction. However, lateral guidance can also be achieved by any other component.

[0044] In all the embodiments described above, the leaf spring 12a, based on the preload generated by the spring locking element 15, presses a specific clamping force F at the pressure point P via the arched portion 14 onto the top side 6b of the rack 6, causing the rack 6 to be pushed away from the stud bolt 9 even with the tolerance-related intermediate clearance 4. Therefore, the rack 6 or the teeth 7 are preloaded towards the pinion 8. Thus, when the rack 6 is adjusted longitudinally, the stud bolt 9 does not slide along the top side 6b of the rack 6, but rather the arched portion 14 at the pressure point P slides along the top side of the rack. To maintain this under normal load or during normal operation of the vehicle seat, especially when a heavy person is seated, the clamping force F is adjusted through the proper design and positioning of the leaf spring 12a, such that the upward force acting on the rack 6 (towards the stud bolt 9) is always less than the clamping force F of the leaf spring 12a acting on the area of ​​the arched portion 14 or at the pressure point P during normal operation.

[0045] This can be adjusted, for example, through simulated and / or test runs previously conducted under real-world conditions including occupants of corresponding weight, where the spring constant K of the leaf spring 12a or spring member 12 and / or the shape of the arch 14 and / or the positioning of the corresponding spring locking elements 15 (17; 18a) and / or the lengths L1, L2 of the elastic arms 16a, 16b can typically help to change the clamping force F accordingly. In this case, the elastic arms 16a, 16b extend between the pressure point P in the intermediate region 13a and the first end region 13b, or between the pressure point P in the intermediate region 13a and the spring locking element 15.

[0046] Appendix Label Table

[0047] 1 Vehicle Seat

[0048] 1a base frame

[0049] 1b side

[0050] 1c crossbeam

[0051] 2 Bottom Rail

[0052] 3 top rails

[0053] 4. Intermediate gap

[0054] 5a front rocker arm

[0055] 5b rear swingarm

[0056] 6-tooth rack

[0057] The bottom side of rack 6a

[0058] Top side of rack 6b

[0059] 6c main surface

[0060] 7 teeth

[0061] 8 small gears

[0062] 9 double-ended bolts

[0063] 10 Control Devices

[0064] 10a Electric control device

[0065] 10b Manual Operating Device

[0066] 12 Spring Components

[0067] 12a leaf spring

[0068] The middle area of ​​the 13a leaf spring

[0069] The first end region of the 13b leaf spring

[0070] 13c bending area

[0071] 13d second terminal region

[0072] 13e hook

[0073] 13f contact area

[0074] 14 Arched sections

[0075] 15 Spring Locking Components

[0076] 16a, 16b flexible arms

[0077] 17 protrusions

[0078] 18 First guiding element

[0079] 18a connecting piece

[0080] 18b guide plate

[0081] 19 Second Guidance Device

[0082] 19a guide rib

[0083] 20 rack and pinion locking element

[0084] 100 Adjustment Device

[0085] A8 pinion shaft

[0086] A9 bolt shaft

[0087] D89 wheelbase

[0088] F clamping force

[0089] K is the spring constant.

[0090] The lengths of elastic arms 16a and 16b of L1 and L2

[0091] P pressure point

[0092] X Vertical

[0093] Y horizontal

[0094] Z-height adjustment direction

Claims

1. An adjustment device (100) for a vehicle seat (1) having a first adjustment member (5b) and a second adjustment member (1b) adjustable relative to the first adjustment member, wherein a rack (6) having teeth (7) is hinged to the first adjustment member (5b), and a pinion (8) is rotatably supported on the second adjustment member (1b), wherein the rack (6) interacts with a spring member (12) connected to the second adjustment member (1b), wherein the spring member (12) preloads the rack (6) toward the pinion (8). The teeth (7) of the rack (6) mesh with the pinion (8), thereby adjusting the rack (6) as the pinion (8) rotates around the pinion shaft (A8), wherein the first adjusting member and the second adjusting member can move relative to each other through this adjustment of the rack (6). A rack and pinion locking element (20) is also fixed to the second adjusting component (1b), the rack (6) extending between the rack and pinion locking element (20) and the pinion (8) during its adjustment. Its features are, The spring member (12) extends as a separate component between the rack locking element (20) and the spring locking element (15) spaced apart from the rack locking element. The spring member (12) has an arched portion (14) facing the rack (6) in the intermediate region (13a) between the rack locking element (20) and the spring locking element (15). The arched portion (14) abuts against the rack (6) at the pressure point (P) under the condition of forming a clamping force (F) to preload the rack (6) in the direction of the pinion (8). The arched portion is formed in the following manner - A plastic or inelastic bending spring member is applied to the intermediate region between the rack locking element and the spring locking element to permanently form an arch, or - A local bulge is attached to the surface of the spring member in the direction of the top side of the rack, and the local bulge is pressed against the narrow surface of the rack by the clamping force at the pressure point.

2. The adjusting device (100) according to claim 1, characterized in that, The spring member (12) is movable or immovably held on the rack locking element (20).

3. The adjusting device (100) according to claim 1, characterized in that, The spring member (12) is disposed around and / or fixed to the rack locking element (20).

4. The adjusting device (100) according to claim 1, characterized in that, The rack locking element (20) is a double-ended bolt (9) protruding from the second adjusting member (1b).

5. The adjusting device (100) according to claim 1, characterized in that, When the rack (6) abuts against the pinion (8) by means of the teeth (7), an intermediate gap (4) is formed between the rack locking element (20) and the rack (6).

6. The adjusting device (100) according to claim 5, characterized in that, The intermediate gap (4) is less than 1 mm.

7. The adjusting device (100) according to claim 5, characterized in that, The intermediate gap (4) is less than 0.5 mm.

8. The adjusting device (100) according to claim 1, characterized in that, The spring member (12) is a leaf spring (12a) that bends in the intermediate region (13a) between the rack locking element (20) and the spring locking element (15) to form the arch (14), wherein the leaf spring (12a) abuts against the rack (6) at a pressure point (P) in the region of the arch (14) to preload the rack (6) toward the pinion (8).

9. The adjusting device (100) according to claim 1, characterized in that, The arched section is permanently formed through reshaping.

10. The adjusting device (100) according to claim 1, characterized in that, The arched portion (14) facing the rack (6) is U-shaped or V-shaped.

11. The adjusting device (100) according to claim 1, characterized in that, The spring locking element (15) is composed of a protrusion (17) or a connecting piece (18a) protruding from the second adjusting member (1b), the protrusion or the connecting piece being spaced apart from the rack locking element (20) and the spring member (12) being abutted against the protrusion or the connecting piece in a pre-tightened manner.

12. The adjusting device (100) according to claim 11, characterized in that, The spring member (12) is loosely attached to the protrusion (17) or the connecting piece (18a) and / or the spring member (12) is disposed around the protrusion (17) or the connecting piece (18a) in the second end region (13d).

13. The adjusting device (100) according to claim 12, characterized in that, - The spring member (12) is arranged in a U-shape around the spring locking element (15) by means of the second end region (13d), or - The spring member (12) first departs from the rack (6) from the arch (14), bends toward the rack (6) in the bending region (13c) adjacent to the arch, and is engaged below the spring locking element (15) by means of the hook (13e) under the action of preload in the second end region (13d).

14. The adjusting device (100) according to any one of claims 11 to 13, characterized in that, The connecting piece (18a) is part of the first guiding element (18), wherein the first guiding element (18) also has a guide plate (18b) connected to the connecting piece (18a) and parallel to the main surface (6c) of the rack (6), the guide plate restricting the movement of the rack (6) in the transverse (Y) direction.

15. The adjusting device (100) according to claim 1, characterized in that, The spring member (12) also has at least one lateral guide rib (19a), wherein the at least one guide rib (19a) is laterally bent at the spring member (12) such that the at least one guide rib is parallel to the main surface (6c) of the rack (6) so as to restrict the movement of the rack (6) in the transverse (Y) direction.

16. The adjusting device (100) according to claim 1, characterized in that, The pinion (8) can be driven by a control device (10), wherein the control device (10) is an electric control device (10a) or a manual control device (10b).

17. The adjusting device (100) according to claim 1, characterized in that, The adjustment device (100) is adapted to adjust the height of the vehicle seat (1), wherein the first adjustment component is a rear rocker arm pivotally supported on the base side, and the second adjustment component (1b) is the side of the base frame (1a) of the vehicle seat (1). The rear rocker arm is pivotable relative to the side via the movement of the rack (6), so that the base frame (1a) is adjusted in the height adjustment direction (Z).

18. A vehicle seat (1) having a base frame (1a) adjustable by means of a rocker arm that can be supported on the side of a base, wherein the base frame (1a) has a side and a crossbeam (1c), wherein the base frame (1a) works in conjunction with an adjustment device (100) according to any of the preceding claims.

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