Waist support adjusting device of seat, seat and vehicle

Abstract

The utility model discloses a seat waist support adjusting device, a seat and a vehicle, the seat waist support adjusting device comprises a waist support supporting plate, the waist support supporting plate comprises two first supporting parts, and the two first supporting parts are obliquely arranged towards the front side along the left-right direction; a driving member; the two transmission assemblies are connected with the two first supporting parts in a one-to-one correspondence mode, the transmission assemblies can slide in the length direction of the first supporting parts relative to the first supporting parts, the driving piece is in transmission fit with the two transmission assemblies, and the driving piece selectively drives the two transmission assemblies to be close to or away from each other in the left-right direction; and the waist support supporting plate is selectively driven to move in the front-back direction. Therefore, by optimizing the waist support adjusting device of the seat, the use requirements of different users in different scenes can be met, the lifting amplitude of the waist is improved, the waist of the user can be effectively and stably supported, and the arrangement requirement of the sectional type backrest seat can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a lumbar support adjusting device for a seat, a seat and a vehicle. Background Art

[0002] As people's requirements for seat comfort continue to increase, technological innovations are constantly being made in areas such as car seats and sofa seats. Electric adjustment functions are increasingly used in seats to meet the needs of different users.

[0003] In related technologies, electric seats use motor adjustment to drive the lumbar support plate to move forward and backward, improving seat comfort. However, the structural design is not reasonable enough, and there are problems such as small lumbar lifting range and poor customer perception. It cannot meet the needs of segmented backrest seats, and the user experience is low. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a lumbar support adjustment device for a seat, which not only provides a higher lumbar lift and more stable operation, but also can adapt to the needs of sectional backrest seats.

[0005] Another object of the present invention is to provide a seat.

[0006] Another object of the present invention is to provide a vehicle.

[0007] According to the lumbar support adjustment device of the seat of the embodiment of the utility model, it includes: a lumbar support plate, which is suitable for being connected to the lumbar support of the seat, and the lumbar support plate includes: two first support parts, one ends of the two first support parts are connected to each other, and the other ends of the two first support parts gradually move away from each other in the left and right directions, and the two first support parts are both inclined toward the front side along the left and right directions; a driving member, which is suitable for being fixedly connected to the seat; a transmission assembly, which includes two transmission assemblies, and the two transmission assemblies are respectively connected to the two first support parts in a one-to-one correspondence, and the transmission assembly is slidable relative to the first support parts in the length direction of the first support parts, and the driving member is in transmission cooperation with the two transmission assemblies, and the driving member selectively drives the two transmission assemblies to move closer to or away from each other in the left and right directions, so as to selectively drive the lumbar support plate to move in the front and rear directions.

[0008] Therefore, by optimizing the lumbar support adjustment device of the seat, it can not only adapt to the usage needs of different users in different scenarios, increase the lifting range of the waist, provide effective and stable support for the user's waist, and improve the user's usage experience, but also ensure that the structure is simple and reliable, and can meet the layout requirements of the segmented backrest seat.

[0009] In some examples of the present invention, there are two driving members, which are spaced apart on both sides of the lumbar support plate in the left and right directions, and the two driving members are respectively matched with the two transmission assemblies for transmission.

[0010] In some examples of the present invention, the driving member is a motor, the motor is provided with a transmission screw, the transmission screw is extended in the left and right directions, and the transmission assembly includes: a first slider, the first slider is sleeved on the outside of the transmission screw and is threaded with the transmission screw.

[0011] In some examples of the present invention, a limiting member is provided at one end of the transmission screw away from the motor, and the limiting member selectively cooperates with the first sliding block in a limiting manner.

[0012] In some examples of the present invention, the transmission assembly also includes: a first sliding part, the first sliding part is connected to the first slider, a second sliding part is provided on the first support part, the first sliding part is connected to the second sliding part and slides with the second sliding part in the length direction of the first support part.

[0013] In some examples of the present invention, one of the first sliding portion and the second sliding portion is a second slider, and the other is a slide rail. Either one of the slider and the slide rail extends in the length direction of the first support portion and slides with the other.

[0014] In some examples of the present invention, the first support portion is further provided with a flange, which is connected to one side of the first support portion in the up and down directions and is bent toward the rear side, and the second sliding portion is a slide rail, which extends in the length direction of the first support portion and is connected to the flange.

[0015] In some examples of the present invention, the lumbar support adjustment device for a seat further includes: a fixing bracket, the driving member is fixedly disposed on the fixing bracket, and the fixing bracket is suitable for being fixedly connected to the seat.

[0016] The seat according to the embodiment of the present invention includes: a backrest; a lumbar support, which is arranged on the lower side of the backrest and spaced apart from the backrest; and a lumbar support adjustment device for the seat, wherein the lumbar support is connected to the lumbar support plate.

[0017] A vehicle according to an embodiment of the present invention includes: the above seats.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of a lumbar support adjustment device for a seat in a closed state according to an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of a lumbar support adjustment device for a seat according to an embodiment of the present invention in a raised state;

[0022] Figure 3 is a schematic diagram of the lumbar support adjustment device for a seat according to an embodiment of the present invention from another perspective;

[0023] Figure 4 It is a cross-sectional view of a lumbar support adjustment device for a seat according to an embodiment of the present utility model.

[0024] Reference numerals:

[0025] 100. Lumbar support adjustment device;

[0026] 10. Lumbar support plate; 11. First support portion; 111. Flanged edge; 1111. Third mounting hole; 112. Second sliding portion; 1121. Fourth mounting hole; 113. Second fastener; 12. Second support portion;

[0027] 20. Driving member; 21. Transmission screw; 22. Limiting member;

[0028] 30. Transmission assembly; 31. First slider; 32. First sliding portion; 321. Second mounting hole; 33. First fastener;

[0029] 40. Fix the bracket. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0031] Reference below Figures 1-4 The lumbar support adjustment device 100 for a seat according to an embodiment of the present invention is described. The lumbar support adjustment device 100 for a seat can be used in a seat, and the seat can be used in a vehicle.

[0032] Combine Figures 1-4 As shown, the lumbar support adjustment device 100 for a seat according to the present invention may mainly include: a driving member 20 , a transmission assembly 30 and a lumbar support plate 10 .

[0033] Among them, the lumbar support plate 10 is suitable for being connected to the lumbar support of the seat, and the lumbar support plate 10 can mainly include: two first support parts 11, one ends of the two first support parts 11 are connected to each other, and the other ends of the two first support parts 11 gradually move away from each other in the left and right directions, and the two first support parts 11 are both inclined toward the front along the left and right directions, the driving member 20 is suitable for being fixedly connected to the seat, there are two transmission components 30, and the two transmission components 30 are respectively connected to the two first support parts 11 in a one-to-one correspondence, and the transmission components 30 are slidable relative to the first support parts 11 in the length direction of the first support parts 11, the driving member 20 is coordinated with the two transmission components 30 for transmission, and the driving member 20 selectively drives the two transmission components 30 to approach or move away from each other in the left and right directions, so as to selectively drive the lumbar support plate 10 to move in the front and rear directions.

[0034] Specifically, the lumbar support plate 10 is suitable for connecting with the lumbar support of the chair to provide support for the human waist. It can not only help maintain the natural curve of the lumbar spine, but also disperse the body weight, thereby promoting a good sitting posture, reducing pressure on the spine and intervertebral discs, and reducing the health risks that may be caused by long-term sitting.

[0035] By making the lumbar support plate 10 include two first support parts 11, one ends of the two first support parts 11 are connected to each other, and the other ends of the two first support parts 11 are gradually separated in the left and right directions, so that the two first support parts 11 are both inclined toward the front side along the left and right directions, the overall structure of the lumbar support plate 10 can be formed. After the lumbar support is connected to the lumbar support plate 10, the lumbar support plate 10 can cooperate with the lumbar support to support the human waist.

[0036] The lumbar support plate 10 may further include a second support portion 12 extending in the left-right direction, with the two second support portions 12 having their ends connected to one end of the two first support portions 11, respectively, so that an angle exists between each first support portion 11 and the second support portion 12, thereby forming the overall structure of the lumbar support plate 10. In this way, the lumbar support plate 10 can adapt to the physiological curve of the human waist. After the lumbar support is connected to the lumbar support plate 10, the lumbar support plate 10 can cooperate with the lumbar support to support the human waist not only from the back, but also from the left and right sides, thereby improving the user experience.

[0037] Furthermore, by engaging the drive member 20 with the two transmission assemblies 30, the drive member 20 selectively drives the two transmission assemblies 30 toward or away from each other in the left-right direction. Furthermore, the two transmission assemblies 30 are connected to the two first support portions 11 in a one-to-one correspondence, and the transmission assemblies 30 are slidable relative to the first support portions 11 in the longitudinal direction of the first support portions 11. In this way, the power of the drive member 20 can be transmitted to the two first support portions 11 through the two transmission assemblies 30.

[0038] Specifically, because the two first support portions 11 are tilted toward the front in the left-right direction, when the driving member 20 drives the two transmission assemblies 30 toward each other in the left-right direction, the two transmission assemblies 30 respectively generate a force on the first support portions 11 that slide together therewith. This force is perpendicular to the length direction of the first support portions 11 and is directed forward, thereby pushing the two first support portions 11 and even the lumbar support plate 10 forward. Furthermore, when the driving member 20 drives the two transmission assemblies 30 away from each other in the left-right direction, the two transmission assemblies 30 respectively generate a force on the first support portions 11 that slide together therewith. This force is perpendicular to the length direction of the first support portions 11 and is directed backward, thereby pushing the two first support portions 11 and even the lumbar support plate 10 backward.

[0039] Specifically, by controlling the operation of the driver 20, the lumbar support plate 10 can be driven to move forward and backward, allowing the lumbar support adjustment device 100 to switch between a closed state and an elevated state, making the lumbar support adjustment device 100 more intelligent and controllable. It should be noted that there is no single elevated state; users can select different elevation distances and stay in different elevated states as needed. This allows the device to adapt to the needs of different users in different scenarios, effectively supporting the user's lumbar spine and enhancing the user experience.

[0040] In addition, the lumbar support adjustment device 100 of the seat can independently adjust the movement of the lumbar support plate 10 in the front and rear directions. It can not only adapt to the segmented backrest seat, but also the lumbar support plate 10 has a larger lifting range, runs more smoothly, and the user experience is better.

[0041] Therefore, by optimizing the lumbar support adjustment device 100 of the seat, it is not only possible to adapt to the usage needs of different users in different scenarios, increase the lifting range of the waist, provide effective and stable support for the user's waist, and improve the user's usage experience, but also ensure that the structure is simple and reliable, and can meet the layout requirements of the segmented backrest seat.

[0042] Combine Figures 1-4 As shown, there are two driving members 20 , which are spaced apart on both sides of the lumbar support plate 10 in the left and right directions, and the two driving members 20 are respectively matched with the two transmission assemblies 30 for transmission.

[0043] Specifically, the number of driving members 20 can be set to two, and the two driving members 20 are spaced apart and arranged on both sides of the lumbar support plate 10 in the left and right directions, so that the two transmission components 30 are respectively transmitted and matched between the two driving members 20 and the two first support parts 11, so that the power of the two driving members 20 can be transmitted to the two first support parts 11 respectively through the two transmission components 30.

[0044] On the premise of ensuring that the lumbar support plate 10 can move forward and backward, the two driving parts 20 and the two transmission components 30 can be made to work simultaneously to ensure the synchronization of the left and right sides of the lumbar support plate 10, so that the force on the lumbar support plate 10 is more uniform, thereby making the operation of the lumbar support plate 10 more stable and reliable, and improving the reliability of the lumbar support adjustment device 100 of the seat, and improving the supporting effect of the lumbar support plate 10 on the human waist.

[0045] In addition, the structure of the lumbar support adjustment device 100 of such a seat is simpler and more compact, and its size in the front-to-back direction is smaller, which can meet the layout requirements of new energy ultra-thin seats.

[0046] Combine Figures 1-4 As shown, the driving member 20 is a motor, and the motor is provided with a transmission screw 21, which extends in the left and right directions. The transmission assembly 30 may include: a first slider 31, which is sleeved on the outside of the transmission screw 21 and is threadedly engaged with the transmission screw 21.

[0047] Specifically, the driving member 20 can be configured as a motor, and a transmission screw 21 extending in the left-right direction can be provided on the motor. When the motor is in operation, the transmission screw 21 can be driven to rotate. Furthermore, the first slider 31 of the transmission assembly 30 is sleeved on the outside of the transmission screw 21, so that the first slider 31 and the transmission screw 21 are threadedly engaged. In this way, the rotation of the transmission screw 21 can drive the first slider 31 to move relative to the transmission screw 21 in the direction of the axis of the transmission screw 21. In other words, the rotational motion output by the motor can be converted into the linear motion of the first slider 31 in the left-right direction, thereby enabling the driving member 20 to drive the transmission assembly 30 to move in the left-right direction. This not only simplifies the structures of the driving member 20 and the transmission assembly 30, but also makes the transmission coordination between the driving member 20 and the transmission assembly 30 more stable and reliable.

[0048] Further, combined with Figures 1-4 As shown, a limiting member 22 is provided at one end of the transmission screw 21 away from the motor, and the limiting member 22 selectively cooperates with the first sliding block 31 to limit the position.

[0049] Specifically, when the motor drives the transmission screw 21 and the first slider 31 moves on the transmission screw 21, there is a risk that the end of the transmission screw 21 away from the motor will fall off. By providing a limiter 22 at the end of the transmission screw 21 away from the motor, when the first slider 31 moves to the end of the transmission screw 21 away from the motor, it can engage with the limiter 22. The limiter 22 can prevent the first slider 31 from further movement, thereby reminding the user to adjust the position in place and preventing the first slider 31 from falling off the transmission screw 21. This can further improve the reliability of the lumbar support adjustment device 100 for the seat and enhance the user experience.

[0050] It should be noted that the transmission assembly 30 not only engages in transmission with the transmission screw 21 but also slides with the first support portion 11. The position limiter 22 not only limits the maximum travel of the transmission assembly 30 on the transmission screw 21, thereby preventing the transmission assembly 30 from falling off the transmission screw 21, but also limits the maximum travel of the transmission assembly 30 relative to the first support portion 11, thereby preventing the sliding engagement between the transmission assembly 30 and the first support portion 11 from failing. In other words, simply by providing the position limiter 22, failure of the transmission engagement between the transmission assembly 30 and the transmission screw 21 and the first support portion 11 can be avoided, thereby making the structure of the seat lumbar support adjustment device 100 simpler and more reliable.

[0051] Combine Figures 1-4 As shown, the transmission assembly 30 may also include: a first sliding part 32, the first sliding part 32 is connected to the first slider 31, a second sliding part 112 is provided on the first support part 11, the first sliding part 32 is connected to the second sliding part 112 and slides with the second sliding part 112 in the length direction of the first support part 11.

[0052] Specifically, by connecting the first sliding portion 32 to the first slider 31, when the motor is operating, the first sliding portion 32 moves in the left-right direction. Furthermore, by providing the second sliding portion 112 on the first support portion 11, the first sliding portion 32 is connected to the second sliding portion 112. Thus, while the first sliding portion 32 moves in the left-right direction, it will slide and cooperate with the second sliding portion 112 in the longitudinal direction of the first support portion 11, thereby pushing the first support portion 11 and, as a result, the entire lumbar support plate 10 in the front-to-back direction. This makes the transmission coordination between the transmission assembly 30 and the first support portion 11 simpler and more stable and reliable.

[0053] Combine Figure 3 and Figure 4As shown, one of the first sliding portion 32 and the second sliding portion 112 is a second sliding block, and the other is a sliding rail. Either the sliding block or the sliding rail is extended in the length direction of the first supporting portion 11 and slidably cooperates with the other.

[0054] Specifically, by setting one of the first sliding part 32 and the second sliding part 112 as a second slider and the other as a slide rail, and making any one of the slider and the slide rail extend in the length direction of the first support part 11, it is only necessary to slide it with the other one to achieve the sliding fit between the first sliding part 32 and the second sliding part 112, which not only makes the sliding fit between the first sliding part 32 and the second sliding part 112 simpler to achieve, but also makes the sliding fit between the first sliding part 32 and the second sliding part 112 more stable and reliable.

[0055] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the first sliding portion 32 is a second slider. Furthermore, a first mounting hole can be provided on the first slider 31, and a second mounting hole 321 can be provided on the second slider, so that the first slider 31 and the second slider can be manufactured separately. During assembly, the first slider 31 is firstly coupled to the transmission screw 21 for transmission, and the second slider is slidably coupled to the slide rail. Then, the first mounting hole and the second mounting hole 321 are aligned, and the first fastener 33 is simultaneously passed through the first mounting hole and the second mounting hole 321 and fastened. This allows the connection between the first slider 31 and the second slider to be realized, making the connection between the first slider 31 and the second slider simpler and more reliable, thereby making the structure of the transmission assembly 30 simpler and more reliable. Of course, the first slider 31 and the second slider can also be provided as integrally manufactured structural members, which is not specifically limited here.

[0056] Correspondingly, combined Figures 1-4 As shown, the first support portion 11 is also provided with a flange 111, which is connected to one side of the first support portion 11 in the up and down directions and is bent toward the rear side. The second sliding portion 112 is a slide rail, which extends in the length direction of the first support portion 11 and is fixedly connected to the flange 111.

[0057] Specifically, a flange 111 can be provided on the first support part 11, and the flange 111 is connected to one side of the first support part 11 in the up and down directions and is bent toward the rear side, so that the slide rail can be connected to the flange 111. On the premise of ensuring that the front side structure of the first support part 11 is flat and avoiding the foreign body feeling in the user's waist support, the setting of the slide rail on the first support part 11 can be simpler and more reliable.

[0058] Among them, a third mounting hole 1111 can be set on the flange 111, and the slide rail is provided with a fourth mounting hole 1121. In this way, it is only necessary to make the third mounting hole 1111 and the fourth mounting hole 1121 correspond to each other, and then make the second fastener 113 pass through the third mounting hole 1111 and the fourth mounting hole 1121 at the same time and tighten them, so as to realize the connection between the slide rail and the flange 111 and realize the setting of the second sliding part 112 on the first support part 11.

[0059] It should be noted that, by making the first sliding part 32 a second slider and the second sliding part 112 a slide rail, and making the slide rail extend in the length direction of the first support part 11, the structural design of the first sliding part 32 and the second sliding part 112 can be optimized, and the structure of the second sliding part 112 can be adapted to the first support part 11, so that the volume of the first sliding part 32 is smaller, thereby further improving the structural compactness and reliability of the seat lumbar support adjustment device 100.

[0060] Combine Figures 1-4 As shown, the lumbar support adjustment device 100 for a seat may further include: a fixing bracket 40 , on which the motor is fixedly disposed, and the fixing bracket 40 is suitable for being connected to the seat.

[0061] Specifically, by setting a fixed bracket 40, the driving member 20 can be fixedly set on the fixed bracket 40. The fixed bracket 40 can adapt to more installation scenarios, and only the fixed bracket 40 needs to be fixedly connected to the seat to achieve the overall installation and fixation of the driving member 20 and even the lumbar support adjustment device 100 of the seat, which not only facilitates the installation and setting of the lumbar support adjustment device 100, but also ensures the installation stability and reliability of the lumbar support adjustment device 100.

[0062] Optionally, the fixing bracket 40 can be fixedly connected to the side plate of the seat. Also, when two driving members 20 are provided, two fixing brackets 40 can also be provided, and the two fixing brackets 40 correspond to the two driving members 20.

[0063] The seat according to the present invention may primarily include: a backrest, a lumbar support, and the aforementioned lumbar support adjustment device 100. The lumbar support is disposed below and spaced apart from the backrest, and is connected to the lumbar support plate 10. This allows for a segmented backrest design. The lumbar support adjustment device 100 selectively controls the fore-aft movement of the lumbar support, thereby adapting to the needs of different users in different scenarios, effectively supporting the user's lumbar region, and enhancing the user experience.

[0064] The vehicle according to the present invention may mainly include the above-mentioned seat, thereby improving the user's riding experience and alleviating the user's discomfort during long-term riding, thereby improving the user's experience and enhancing the product competitiveness of the vehicle.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0066] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lumbar support adjustment device for a seat, characterized in that: include: A lumbar support plate (10), the lumbar support plate (10) being suitable for connection with the lumbar support of a seat, the lumbar support plate (10) comprising: two first support portions (11), one ends of the two first support portions (11) being connected to each other, the other ends of the two first support portions (11) being gradually separated in the left-right direction, and the two first support portions (11) being inclined toward the front side in the left-right direction; A driving member (20), wherein the driving member (20) is adapted to be fixedly connected to the seat; The transmission assembly (30) is provided with two transmission assemblies (30), and the two transmission assemblies (30) are respectively connected to the two first support parts (11) in a one-to-one correspondence, and the transmission assembly (30) is slidable relative to the first support part (11) in the length direction of the first support part (11), and the driving member (20) is in transmission cooperation with the two transmission assemblies (30), and the driving member (20) selectively drives the two transmission assemblies (30) to move closer to or away from each other in the left and right directions, so as to selectively drive the lumbar support plate (10) to move in the front and back directions.

2. The lumbar support adjustment device for a seat according to claim 1, characterized in that: There are two driving members (20), and the two driving members (20) are spaced apart and arranged on both sides of the lumbar support plate (10) in the left and right directions. The two driving members (20) are respectively matched with the two transmission assemblies (30) for transmission.

3. The lumbar support adjustment device for a seat according to claim 2, characterized in that: The driving member (20) is a motor, and the motor is provided with a transmission screw (21), and the transmission screw (21) is extended in the left and right directions. The transmission assembly (30) includes: a first slider (31), and the first slider (31) is sleeved on the outside of the transmission screw (21) and is threadedly engaged with the transmission screw (21).

4. The lumbar support adjustment device for a seat according to claim 3, characterized in that: A limiting member (22) is provided at one end of the transmission screw (21) away from the motor, and the limiting member (22) selectively cooperates with the first sliding block (31) in a limiting manner.

5. The lumbar support adjustment device for a seat according to claim 3, characterized in that: The transmission assembly (30) further includes: a first sliding portion (32), the first sliding portion (32) being connected to the first sliding block (31); a second sliding portion (112) being provided on the first supporting portion (11); the first sliding portion (32) being connected to the second sliding portion (112) and slidingly engaging with the second sliding portion (112) in the length direction of the first supporting portion (11).

6. The lumbar support adjustment device for a seat according to claim 5, characterized in that: One of the first sliding portion (32) and the second sliding portion (112) is a second sliding block, and the other is a sliding rail. Either one of the sliding block and the sliding rail is extended in the length direction of the first supporting portion (11) and is slidably matched with the other.

7. The lumbar support adjustment device for a seat according to claim 5, characterized in that: The first support portion (11) is further provided with a flange (111), the flange (111) being connected to one side of the first support portion (11) in the up-down direction and being bent toward the rear side, and the second sliding portion (112) being a slide rail, the slide rail being extended in the length direction of the first support portion (11) and being connected to the flange (111).

8. The lumbar support adjustment device for a seat according to claim 3, characterized in that: Also includes: A fixed bracket (40), the driving member (20) is fixedly arranged on the fixed bracket (40), and the fixed bracket (40) is suitable for being fixedly connected to the seat.

9. A seat, characterized in that: include: Back-to-back; A lumbar support, the lumbar support being arranged on the lower side of the backrest and spaced apart from the backrest; The lumbar support adjustment device (100) for a chair according to any one of claims 1 to 8, wherein the lumbar support is connected to the lumbar support plate (10).

10. A vehicle, characterized in that: include: The seat according to claim 9.

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