CN217672272U - Backrest adjusting device and vehicle seat assembly - Google Patents

Abstract

The utility model provides a back adjusting device, it is used for the vehicle seat subassembly including a plurality of seats, back adjusting device includes: a plurality of seat brackets respectively assigned to the plurality of seats, each of the seat brackets including a cushion bracket and a back bracket; a plurality of angle adjusting mechanisms corresponding to the plurality of seat brackets, each of the plurality of angle adjusting mechanisms being respectively arranged between a seat cushion bracket and a seatback bracket of one of the plurality of seat brackets and configured to be adapted to adjust an angle of the seatback bracket with respect to the seat cushion bracket; a common synchronizing lever, to which the plurality of angle adjusting mechanisms are all connected and which is synchronously driven by the synchronizing lever to adjust the angle of the back bracket relative to the seat cushion bracket; and a driving mechanism connected to the synchronizing bar to drive the synchronizing bar to rotate. The utility model also provides a vehicle seat subassembly. Through the utility model discloses, can improve the synchronism of the angle modulation operation of a plurality of backs.

Description

Backrest adjusting device and vehicle seat assembly

Technical Field

The utility model relates to a vehicle seat field specifically relates to a back adjusting device and a vehicle seat subassembly.

Background

Rear-middle seats of vehicles are typically provided as vehicle seat assemblies that include a plurality of seats. Such a vehicle seat assembly may have various adjustment functions, such as a backrest angle adjustment function, in order to enhance the user experience. By adjusting the angle of the backrest of the seat relative to the seat cushion, the user can use the seat in a more comfortable posture. In particular, it is also possible to lay the backrest down, so that more free space is available for loading more or larger items.

The angle of the backrest relative to the seat cushion can be adjusted in an electric mode. For this purpose, each seat is equipped with a respective electric drive, a rotary shaft and an angle adjustment mechanism. For example, in a vehicle seat assembly having three seats, three sets of electric actuators, rotary shafts, and angle adjustment mechanisms are provided, corresponding to the three seats, respectively. In each seat, the rotary shaft is driven by an electric drive and in turn drives an angle adjustment mechanism, so that the backrest of the associated seat is adjusted individually. In the case where it is desired to adjust the back rests of all seats of the vehicle seat assembly in synchronization, the three rotary shafts may be driven to rotate in synchronization by the electric drive, causing the angle adjustment mechanism to adjust the three back rests in synchronization.

However, in practice, when performing an operation of adjusting the back rests of all the seats of the vehicle seat assembly synchronously, the rotational speeds and/or rotational times of the respective rotary shafts tend to be inconsistent, so that the movements of the back rests are not synchronized with each other, for example, due to differences in performance of different electric drives or differences in deadweight of different angle adjustment mechanisms.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a modified back adjusting device and corresponding vehicle seat subassembly to improve the synchronism of the angle modulation operation of a plurality of backs.

According to a first aspect of the present invention, a backrest adjustment device is provided for a vehicle seat assembly comprising a plurality of seats, wherein the backrest adjustment device comprises: a plurality of seat brackets respectively assigned to the plurality of seats, each of the seat brackets including a cushion bracket and a backrest bracket; a plurality of angle adjusting mechanisms corresponding to the plurality of seat brackets, each of the plurality of angle adjusting mechanisms being respectively arranged between a seat cushion bracket and a seatback bracket of one of the plurality of seat brackets and configured to be adapted to adjust an angle of the seatback bracket with respect to the seat cushion bracket; a common synchronizing lever, to which the plurality of angle adjusting mechanisms are all connected and which is synchronously driven by the synchronizing lever to adjust the angle of the back bracket relative to the seat cushion bracket; and the driving mechanism is connected to the synchronous rod to drive the synchronous rod to rotate.

In one exemplary embodiment, the synchronization rod is constructed as a single, unitary piece.

In one exemplary embodiment, the synchronization lever includes a plurality of sub-levers respectively connected to the plurality of angle adjustment mechanisms, the plurality of sub-levers being fixed to each other.

In one exemplary embodiment, the plurality of sub-bars are fixed to each other by welding.

In an exemplary embodiment, the synchronization rod comprises a plurality of sub-rods respectively connected to the plurality of angle adjustment mechanisms and at least one coupling, any two adjacent sub-rods of the plurality of sub-rods being connected to each other by the coupling, wherein in a connected state of the coupling the adjacent sub-rods are non-rotatably connected to each other and in a disconnected state of the coupling the adjacent sub-rods are disconnected from each other such that the at least two angle adjustment mechanisms respectively connected to the adjacent sub-rods are driven by the adjacent sub-rods independently of each other.

In an exemplary embodiment, the drive mechanism comprises at least one electric drive connected to the synchronization bar for driving the synchronization bar in rotation, wherein the number of the at least one electric drive is less than the number of the plurality of seat supports.

In an exemplary embodiment, the at least one electric drive comprises two electric drives, which are arranged at both ends of the synchronization rod, respectively.

In one exemplary embodiment, the plurality of seat brackets includes three seat brackets including a first seat bracket, a second seat bracket, and a third seat bracket arranged side by side in this order; a first of the two electric drives is attached to the back bracket of the first seat bracket; the second of the two electric drives is attached to the back bracket of the third seat bracket.

In one exemplary embodiment, each seat cushion bracket includes a pair of seat cushion side frames; each backrest bracket includes a pair of backrest side frames; each angle adjustment mechanism includes a pair of adjustment assemblies respectively disposed between the back side frame and the seat cushion side frame to adjust an angle of the back side frame relative to the seat cushion side frame.

According to a second aspect of the present invention, a vehicle seat assembly is provided, wherein the vehicle seat assembly comprises a plurality of seats and a backrest adjusting device according to the present invention.

The utility model has the advantages of: by having the plurality of angle adjustment mechanisms of the vehicle seat assembly all connected to a common (same) synchronization lever and being synchronously driven by the synchronization lever to adjust the angle of the backrest bracket relative to the seat cushion bracket, the backrest of the plurality of seats of the vehicle seat assembly can be synchronously adjusted. This improves the synchronism of the angle adjustment operation of the plurality of backs. In particular, the backrests of a plurality of seats of a vehicle seat assembly can be laid down simultaneously, thereby obtaining a larger space, for example, at the rear of the vehicle to place bulky or heavy items.

Drawings

The principles, features and advantages of the present invention may be better understood by describing the invention in more detail below with reference to the accompanying drawings. The drawings comprise:

fig. 1 schematically illustrates a vehicle seat assembly according to an exemplary embodiment of the present invention; and

fig. 2 schematically shows a vehicle seat assembly according to an exemplary embodiment of the present invention.

List of reference numerals

10. Chair (Ref. Now to FIGS)

10a first seat

10b second seat

10c third seat

11. Cushion part

12. Backrest part

20. Seat support

20a first seat support

20b second seat support

20c third seat support

21. Cushion support

211. Left side cushion side frame

212. Right side cushion side frame

22. Back support

221. Left side backrest side frame

222. Right side backrest side frame

30. Angle adjusting mechanism

31. Left side adjusting part

32. Right side adjusting part

40. Synchronizing bar

41. Sub-rod

41a first sub-rod

41b second sub-rod

41c third sub-rod

42. Coupling device

42a first coupling

42b second coupling

50. Driving mechanism

51a first electric drive

51b second electric drive

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and a plurality of exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

It should be understood that in this document the expressions "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying a relative importance nor as implying an implicit indication of the number of technical features indicated. A feature defined as "first" or "second" may be explicitly or implicitly indicated as including at least one of the feature. As used herein, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

Fig. 1 schematically shows a vehicle seat assembly according to an exemplary embodiment of the present invention. Vehicle seat assemblies may be installed in various types of motor vehicles, particularly passenger cars. The vehicle seat assembly may be configured in particular as a middle and rear seat of a vehicle, in particular a rear seat next to a trunk of the vehicle.

As shown in fig. 1, the vehicle seat assembly includes a plurality of seats 10. Each seat 10 includes a cushion portion 11 and a back portion 12.

The vehicle seat assembly further includes a backrest adjustment device configured to adjust an angle of the backrest portion 12 relative to the seat cushion portion 11. The backrest adjusting means includes a plurality of seat brackets 20 respectively assigned to the plurality of seats 10. Each seat bracket 20 includes a seat cushion bracket 21 and a backrest bracket 22. The cushion bracket 21 and the back bracket 22 may be disposed within the cushion portion 11 and the back portion 12, respectively, and serve as a framework of the seat 10. The cushion portion 11 and the back portion 12 may also include a seat cover and a cushion (not shown in the drawings). The cushion may provide the desired shape to the seat 10 and support for the user.

The backrest adjusting device further includes: a plurality of angle adjusting mechanisms 30 corresponding to the plurality of seat brackets 20, each of the plurality of angle adjusting mechanisms 30 being respectively arranged between the seat cushion bracket 21 and the back bracket 22 of one of the plurality of seat brackets 20 and configured to be adapted to adjust an angle of the back bracket 22 with respect to the seat cushion bracket 21; a common synchronizing lever 40, to which the plurality of angle adjusting mechanisms 30 are all connected and which is synchronously driven by the synchronizing lever 40 to adjust the angle of the back bracket 22 relative to the seat cushion bracket 21; and a driving mechanism 50, the driving mechanism 50 being connected to the synchronizing bar 40 to drive the synchronizing bar 40 to rotate.

Thus, the backrest portions 12 of the plurality of seats 10 of the vehicle seat assembly can be adjusted synchronously by means of a common (same) synchronization lever 40. In particular, the back portions 12 of the plurality of seats 10 of the vehicle seat assembly can be laid down simultaneously, thereby obtaining a larger space, for example, at the rear of the vehicle to place bulky or heavy items.

The angle adjustment mechanism 30 may include, for example, a gear structure, a cam structure, and/or a spring, etc. The utility model discloses do not do the restriction to this, as long as it can be with the rotary motion transformation of synchronizing bar adjust the back support 22 for the angle change of cushion support 21 can.

In the embodiment shown in fig. 1, the vehicle seat assembly includes three seats 10 arranged side by side: a first seat 10a, a second seat 10b and a third seat 10c. The three seats 10 are in the transverse direction D _T And (4) arranging. Each seat 10 is provided with a respective seat support 20. Accordingly, the plurality of seat brackets 20 may include three seat brackets 20 including a first seat bracket 20a, a second seat bracket 20b, and a third seat bracket 20c arranged side by side in this order.

In the drawings, reference numerals have been given to only some of the same features for the sake of simplifying the drawings. For example, although each seat bracket 20 includes the seat cushion bracket 21 and the seatback bracket 22, in the drawings, only the seat cushion bracket 21 and the seatback bracket 22 of the first seat bracket 20a are denoted by reference numerals.

Alternatively, each seat cushion bracket 21 includes a pair of seat cushion side frames. The pair of cushion side frames may include a left cushion side frame 211 positioned at a left side of the corresponding seat and a right cushion side frame 212 positioned at a right side of the corresponding seat, with reference to a direction in which a user sits on the seat. Each back bracket 22 may include a pair of back side frames, respectively. The pair of backrest side frames may include a left backrest side frame 221 located on the left side of the belonging seat and a right backrest side frame 222 located on the right side of the belonging seat. Each angle adjustment mechanism 30 may include a pair of adjustment assemblies respectively disposed between the back and seat side frames to adjust the angle of the back side frame relative to the seat side frame. Specifically, the pair of adjustment assemblies may include a left adjustment assembly 31 located on the left side of the seat and a right adjustment assembly 32 located on the right side of the seat. The left adjustment assembly 31 can be disposed between the left back side frame 221 and the left cushion side frame 211 to adjust the angle of the left back side frame 221 relative to the left cushion side frame 211. Similarly, the right side adjustment assembly 32 can be disposed between the right side back sideframe 222 and the right side cushion sideframe 212 to adjust the angle of the right side back sideframe 222 relative to the right side cushion sideframe 212. This configuration provides stable and reliable support for the seat 10.

In further embodiments, each cushion bracket 21 may also be formed as a single, unitary piece, for example in the transverse direction D of the seat 10 _T Is arranged substantially centrally in the cushion portion 11 of the seat 10. Correspondingly, the backrest mount 22 can also be formed as a single, integral piece and in the transverse direction D of the seat _T And is disposed substantially centrally in the back portion 12 of the seat. This simplifies the structure and reduces the number of parts.

Illustratively, the synchronization rod 40 may be along the transverse direction D _T Through the seat cushion bracket 21 and the seatback bracket 22 of each seat bracket 20, the seatback bracket 22 is arranged to be rotatable relative to the seat cushion bracket 21 about a longitudinal center axis of the synchronizing rod 40, thereby changing an angle of the seatback bracket 22 relative to the seat cushion bracket 21.

Preferably, the drive mechanism 50 may comprise at least one electric drive connected to the synchronization rod 40 to drive the synchronization rod 40 in rotation. Each electric drive may, for example, include a motor and a reduction mechanism, respectively, connected between the motor and the synchronizing bar 40 to transfer the rotational motion output by the motor to the synchronizing bar 40. Each of the electrical drivers may be individually connected to the controller to receive control signals sent by the controller. Under the control of the controller, each of the electric drives synchronously outputs a driving force to the synchronization lever 40. The outputs of the individual electric drives can be synchronized, for example, by means of PWM techniques.

The at least one electric drive may for example comprise two electric drives, which are arranged at both ends of the synchronization rod 40, respectively. Thereby, stable driving of the synchronizing lever 40 is facilitated. In particular, the synchronizing bar 40 spanning the plurality of seats 10 generally has a long length, and the provision of the electric drives at both ends of the synchronizing bar 40, respectively, facilitates stable rotation of the synchronizing bar 40.

Preferably, the number of the at least one electric driver may be less than the number of the plurality of seat brackets 20. Alternatively, the number of the at least one electric drives may be less than the number of the plurality of seats 10. As shown in fig. 1, in a vehicle seat assembly provided with three seat brackets 20, only two electric drives may be provided. Since the plurality of angle adjustment mechanisms 30 are all connected to a common synchronization rod 40 and are driven synchronously by the synchronization rod 40, it is not necessary to equip each seat 10 with an electric drive individually. Therefore, the cost can be reduced.

For example, a first electrical actuator 51a of the two electrical actuators may be attached to the back bracket 22 of the first seat bracket 20a and a second electrical actuator 51b of the two electrical actuators may be attached to the back bracket 22 of the third seat bracket 20c. In the embodiment shown in fig. 1, the first electric actuator 51a is attached to the left side back side frame 221 of the first seat frame 20a and the second electric actuator 51b is attached to the right side back side frame 222 of the third seat frame 20c.

In an exemplary embodiment, the drive mechanism 50 may include only one electrical drive, with the synchronizing bar 40 being rotated by the drive of the only electrical drive. The one electric drive can be arranged, for example, substantially centrally with respect to the synchronization rod 40. For example, the one electrical actuator may be attached to the back bracket 22 of the second seat bracket 20b between the first seat bracket 20a and the third seat bracket 20c.

In one exemplary embodiment, the synchronizing bar 40 may be formed as a single, unitary piece. That is, the synchronizing bar 40 may be machined from a single blank. Thus, the synchronizing bar 40 can have high strength.

In an exemplary embodiment, the synchronization lever 40 may include a plurality of sub-levers 41 respectively connected to the plurality of angle adjustment mechanisms 30, the plurality of sub-levers 41 being fixed to each other. For example, the plurality of sub-rods 41 are fixed to each other by welding. The sub-rods 41 may be fixed to each other with a sufficiently high coupling strength so that the synchronization rod 40 can stably drive the plurality of angle adjustment mechanisms 30. The plurality of sub-rods 41 can also be fixed to one another in other ways, for example by means of adhesive bonding, snap-in connection or screw connection.

Fig. 2 schematically shows a vehicle seat assembly according to an exemplary embodiment of the present invention. The vehicle seat assembly has a similar structure to that of the vehicle seat assembly shown in fig. 1.

In the embodiment shown in fig. 2, however, the synchronizing lever 40 includes a plurality of sub-levers 41 and at least one coupling 42 that are respectively connected to the plurality of angle adjusting mechanisms 30, and any two adjacent sub-levers 41 among the plurality of sub-levers 41 are connected to each other by the coupling 42. In the connected state of the coupling 42, the adjacent sub-rods 41 are connected to each other in a rotationally fixed manner, and in the disconnected state of the coupling 42, the adjacent sub-rods 41 are disconnected from each other, so that the at least two angle adjusting mechanisms 30 respectively connected to the adjacent sub-rods 41 are driven by the adjacent sub-rods 41 independently of each other. In other words, the at least one coupling 42 is formed as a disengageable coupling, which has at least two operating states: a connected state and a disconnected state.

The coupling 42 can be switched between the connected state and the disconnected state, for example, manually or electrically. At least one coupling 42 may in particular comprise a plurality of couplings 42 independent of one another, so that the plurality of couplings 42 can be connected or disconnected independently of one another.

As shown in fig. 2, the synchronization lever 40 may include three sub-levers 41: a first sub-rod 41a, a second sub-rod 41b, and a third sub-rod 41c. The first sub-rod 41a and the second sub-rod 41b may be connected to each other by a first coupling 42a, and the second sub-rod 41b and the third sub-rod 41c may be connected to each other by a second coupling 42 b.

With both the first coupling 42a and the second coupling 42b in the connected state, the first sub-rod 41a, the second sub-rod 41b and the third sub-rod 41c are connected to one another in a rotationally fixed manner and together form a single synchronization rod 40. The synchronizing lever 40 is rotatable by the first electric driver 51a and the second electric driver 51b, and in turn, drives the plurality of angle adjusting mechanisms 30 to synchronously adjust the angles of the back bracket 22 of the three seats 10 with respect to the seat cushion bracket 21.

When the first coupling 42a is in the connected state and the second coupling 42b is in the disconnected state, the first sub-rod 41a and the second sub-rod 41b are connected to each other so as not to rotate relatively, and the third sub-rod 41c is disconnected from the second sub-rod 41 b. Therefore, the third sub-lever 41c and the second sub-lever 41b (and the first sub-lever 41 a) are relatively rotatable. In this case, the first sub-lever 41a and the second sub-lever 41b can be driven to rotate together by the first electric driver 51a, thereby adjusting the angle of the back bracket 22 of the first seat 10a and the second seat 10b relative to the seat cushion bracket 21. At the same time, the third sub-lever 41c can be kept stationary, and the angle of the back bracket 22 of the third seat 10c with respect to the seat bracket 21 will also be kept constant. Conversely, the third sub-lever 41c may be driven to rotate only by the second electric driver 51b, and the angle of the backrest support 22 of the third seat 10c with respect to the seat cushion support 21 may be adjusted. Meanwhile, the first sub-lever 41a and the second sub-lever 41b may be held stationary so that the angle of the back bracket 22 of the first seat 10a and the second seat 10b with respect to the seat cushion bracket 21 remains unchanged. Of course, the backrest portions 12 of the first and second seats 10a, 10b and the backrest portion 12 of the third seat 10c may also be adjusted separately, simultaneously but independently of each other.

Similarly, the first coupling 42a can be in a disengaged state and the second coupling 42b can be in a connected state. In this case, the first sub-lever 41a is disengaged from the second sub-lever 41b, and the second sub-lever 41b and the third sub-lever 41c are connected to each other so as not to be rotatable relative to each other. Therefore, the first sub-lever 41a can be driven to rotate by the first electric driver 51a alone, thereby adjusting the angle of the back bracket 22 of the first seat 10a relative to the seat cushion bracket 21. Independently of this, the second electric driver 51b can be used to drive the second sub-lever 41b and the third sub-lever 41c to rotate together, thereby adjusting the angles of the backrest support 22 of the second seat 10b and the third seat 10c relative to the seat cushion support 21.

The first coupling 42a and the second coupling 42b may also each be in a disengaged state such that the first sub-rod 41a, the second sub-rod 41b and the third sub-rod 41c are able to rotate relative to each other between each other. Thereby, the angles of the backrest portions 12 of the first, second, and third seats 10a, 10b, and 10c with respect to the cushion portion 11 can be independently adjusted.

The controller can generate a corresponding control signal for controlling the electric drives, for example, depending on the state of the at least one coupling 42, such that the output of each electric drive is matched to its load.

In further embodiments, the vehicle seat assembly may include two seats 10 or more than four seats 10.

In the embodiment illustrated in fig. 1 and 2, the vehicle seat assembly has a 4-2-4 configuration. In other words, the vehicle seat assembly comprises three seats 10, wherein in the transverse direction D _T The ratio of the widths of the three seats 10 is substantially 4. The concepts of the present application are also applicable to 4-6 configuration vehicle seat assemblies or other configurations of vehicle seat assemblies.

Although specific embodiments of the invention have been described in detail herein, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications may be conceived of without departing from the spirit and scope of the invention. In the specific implementation, a plurality of features can be combined with each other according to actual needs, where technically feasible. In particular, features from different embodiments may also be combined with one another.

Claims (10)

1. A backrest adjustment arrangement for a vehicle seat assembly comprising a plurality of seats (10), characterized in that the backrest adjustment arrangement comprises:

a plurality of seat brackets (20) respectively assigned to the plurality of seats (10), each seat bracket (20) including a seat cushion bracket (21) and a backrest bracket (22);

a plurality of angle adjustment mechanisms (30) corresponding to the plurality of seat brackets (20), each of the plurality of angle adjustment mechanisms (30) being respectively arranged between a seat cushion bracket (21) and a back bracket (22) of one of the plurality of seat brackets (20) and configured to be adapted to adjust an angle of the back bracket (22) with respect to the seat cushion bracket (21);

a common synchronization lever (40), the plurality of angle adjustment mechanisms (30) all being connected to the common synchronization lever (40) and being synchronously driven by the synchronization lever (40) to adjust an angle of the backrest bracket (22) relative to the seat cushion bracket (21); and

a driving mechanism (50), wherein the driving mechanism (50) is connected to the synchronous rod (40) to drive the synchronous rod (40) to rotate.

2. The backrest adjusting device of claim 1,

the synchronizing bar (40) is constructed in a single, integral piece.

3. The backrest adjusting device of claim 1,

the synchronization lever (40) includes a plurality of sub-levers (41) respectively connected to the plurality of angle adjustment mechanisms (30), the plurality of sub-levers (41) being fixed to each other.

4. The backrest adjusting apparatus as claimed in claim 3,

the plurality of sub-rods (41) are fixed to each other by welding.

5. The backrest adjusting device of claim 1,

the synchronization rod (40) comprises a plurality of sub-rods (41) and at least one coupling (42) connected to the plurality of angle adjustment mechanisms (30), respectively, any two adjacent sub-rods (41) of the plurality of sub-rods (41) being connected to each other by the coupling (42), wherein,

in the connected state of the coupling (42), the adjacent sub-rods (41) are connected to each other in a rotationally fixed manner,

in the disengaged state of the coupling (42), the adjacent sub-rods (41) are disengaged from each other, so that at least two angle adjustment mechanisms (30) respectively connected to the adjacent sub-rods (41) are driven by the adjacent sub-rods (41) independently of each other.

6. The backrest adjusting apparatus as claimed in any one of claims 1 to 5,

the drive mechanism (50) comprises at least one electric drive connected to the synchronization bar (40) for driving the synchronization bar (40) in rotation, wherein the number of the at least one electric drives is less than the number of the plurality of seat supports (20).

7. The backrest adjustment device of claim 6,

the at least one electric drive comprises two electric drives, which are arranged at both ends of the synchronization rod (40), respectively.

8. The backrest adjusting device of claim 7,

the plurality of seat brackets (20) include three seat brackets (20) including a first seat bracket (20 a), a second seat bracket (20 b), and a third seat bracket (20 c) arranged side by side in this order;

a first of the two electric drives is attached to a back bracket (22) of a first seat bracket (20 a);

the second of the two electric drives is attached to the back bracket (22) of the third seat bracket (20 c).

9. The backrest adjusting device as claimed in any one of claims 1 to 5, 7 to 8,

each cushion bracket (21) comprises a pair of cushion side frames;

each backrest support (22) comprises a pair of backrest side frames;

each angle adjustment mechanism (30) includes a pair of adjustment members respectively disposed between the back and seat side frames to adjust an angle of the back side frame relative to the seat side frame.

10. A vehicle seat assembly, characterized in that it comprises a plurality of seats (10) and a backrest adjustment device according to any one of claims 1-9.

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