Waist support adjusting device of seat, seat and vehicle

Abstract

The utility model discloses a waist support adjusting device of a seat, the seat and a vehicle. The waist support adjusting device of the seat comprises a first supporting plate and a second supporting plate, a second support plate; the driving part is arranged between the first supporting plate and the second supporting plate and is connected with the first supporting plate; one end of the transmission assembly is connected with the second supporting plate, one end of the transmission assembly can slide in the left-right direction relative to the second supporting plate, and the driving part is in transmission connection with the other end of the transmission assembly and drives the transmission assembly to rotate so as to selectively drive the second supporting plate to be away from or close to the first supporting plate 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 can be improved, the waist of the user can be effectively and stably supported, the arrangement requirement of a sectional type backrest seat can be met, and the practicability is high. And the arrangement requirement of the new energy ultrathin 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 back and forth, 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 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 a seat according to an embodiment of the utility model, it includes: a first support plate, which is extended in the left and right directions and is suitable for being connected to the seat; a second support plate, which is extended in the left and right directions and is spaced apart from the first support plate in the front-to-back direction, and the second support plate is suitable for being connected to the lumbar support of the seat; a driving member, which is arranged between the first support plate and the second support plate and is connected to the first support plate; a transmission assembly, which is arranged between the first support plate and the second support plate, one end of the transmission assembly is connected to the second support plate, and one end of the transmission assembly is slidable in the left and right directions relative to the second support plate, the driving member is transmission-connected to the other end of the transmission assembly and drives the transmission assembly to rotate, so as to selectively drive the second support plate away from or close to the first support plate in the front-to-back direction.

[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 a simple and compact structure, which can meet the layout requirements of segmented backrest seats and the layout requirements of new energy ultra-thin seats.

[0009] In some examples of the present invention, the driving member is a motor, the motor is provided with a motor shaft, and the transmission assembly includes: a transmission rod, one end of which is fixedly connected to the motor shaft.

[0010] In some examples of the present invention, the transmission assembly also includes: a first sliding part, which is rotatably connected to the other end of the transmission rod, and a second sliding part is provided on the second support plate, which is connected to the first sliding part and slides with the first sliding part in the left and right directions.

[0011] In some examples of the present invention, one of the first sliding portion and the second sliding portion is a slider, and the other is a slide groove. Either the slider or the slide groove is extended in the left-right direction and slidably cooperates with the other.

[0012] In some examples of the present invention, the second sliding portion is a slide groove, which extends in the left and right directions. Limiting members are respectively provided at both ends of the slide groove in the left and right directions, and the limiting members selectively cooperate with the slider to limit the position.

[0013] In some examples of the present invention, the lumbar support adjustment device of the seat also includes: a connecting rod assembly, there are at least two connecting rod assemblies, at least two of the connecting rod assemblies are spaced apart on both sides of the left and right directions of the transmission assembly, and / or at least two of the connecting rod assemblies are spaced apart on both sides of the up and down directions of the transmission assembly, and both ends of the connecting rod assembly are rotatably connected to the first support plate and the second support plate respectively.

[0014] In some examples of the present invention, there are four connecting rod assemblies, two of the four connecting rod assemblies are connected to one side of the first support plate and the second support plate in the up and down direction and are spaced apart on both sides of the left and right direction of the transmission assembly, and the other two of the four connecting rod assemblies are connected to the other side of the first support plate and the second support plate in the up and down direction and are spaced apart on both sides of the left and right direction of the transmission assembly.

[0015] In some examples of the present invention, the connecting rod assembly includes: a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are rotatably connected, the other end of the first connecting rod is rotatably connected to the first support plate, and the other end of the second connecting rod is rotatably connected to the second support plate.

[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; the lumbar support adjustment device of the above seat, the lumbar support is connected to the second 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 according to an embodiment of the present invention in a raised state;

[0021] Figure 2 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;

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

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

[0024] Figure 5 This is a partial schematic diagram of the lumbar support adjustment device of a seat in a closed state according to an embodiment of the present utility model;

[0025] Figure 6 This is a partial schematic diagram of another perspective of the lumbar support adjustment device of the seat according to the embodiment of the present invention in the closed state;

[0026] Figure 7 This is a partial cross-sectional view of the lumbar support adjustment device of the seat according to the embodiment of the present utility model in a jacked-up state;

[0027] Figure 8 It is a partial exploded view of the lumbar support adjustment device of a seat according to an embodiment of the present utility model.

[0028] Reference numerals:

[0029] 100. Lumbar support adjustment device;

[0030] 10. First support plate;

[0031] 20. Second support plate; 21. Second sliding portion; 22. Limiting member;

[0032] 30. Driving member; 31. Motor shaft;

[0033] 40. Transmission assembly; 41. Transmission rod; 42. First sliding portion;

[0034] 50. Connecting rod assembly; 51. First connecting rod; 52. Second connecting rod. DETAILED DESCRIPTION

[0035] 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.

[0036] Reference below Figures 1-8 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.

[0037] Combine Figures 1-8 As shown, the lumbar support adjustment device 100 for a seat according to the present invention may mainly include: a first support plate 10 , a second support plate 20 , a driving member 30 and a transmission assembly 40 .

[0038] Among them, the first support plate 10 extends in the left and right directions and is suitable for connecting with the seat, the second support plate 20 extends in the left and right directions and is spaced apart from the first support plate 10 in the front and rear directions, the second support plate 20 is suitable for connecting with the lumbar support of the seat, the driving member 30 is arranged between the first support plate 10 and the second support plate 20 and is connected to the first support plate 10, the transmission assembly 40 is arranged between the first support plate 10 and the second support plate 20, one end of the transmission assembly 40 is connected to the second support plate 20, and one end of the transmission assembly 40 is slidable in the left and right directions relative to the second support plate 20, the driving member 30 is transmission-connected to the other end of the transmission assembly 40 and drives the transmission assembly 40 to rotate, so as to selectively drive the second support plate 20 away from or close to the first support plate 10 in the front and rear directions.

[0039] Specifically, the lumbar support adjustment device 100 of the seat is suitable for connecting with the lumbar support of the seat 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.

[0040] By extending the first support plate 10 in the left-right direction, the first support plate 10 can be connected to the seat, achieving the installation of the entire lumbar support adjustment device 100 on the seat. Furthermore, the first support plate 10 can adapt to a variety of installation scenarios. Simply by fixing the first support plate 10 to the seat, the driver 30 and even the entire lumbar support adjustment device 100 can be installed and fixed to the seat. This not only facilitates the installation of the lumbar support adjustment device 100, but also ensures the installation stability and reliability of the adjustment device of the second support plate 20.

[0041] By extending the second support plate 20 in the left-right direction, after the lumbar support is connected to the second support plate 20, the second support plate 20 can cooperate with the lumbar support to support the waist of the human body.

[0042] Furthermore, by arranging the first support plate 10 and the second support plate 20 at intervals in the front-to-back direction, the driving member 30 is arranged between the first support plate 10 and the second support plate 20 and connected to the first support plate 10, one end of the transmission assembly 40 is connected to the second support plate 20, and one end of the transmission assembly 40 is slidable in the left and right directions relative to the second support plate 20, the driving member 30 is transmission-connected to the other end of the transmission assembly 40 and drives the transmission assembly 40 to rotate, so that the power of the driving member 30 can be transmitted to the second support plate 20 through the transmission assembly 40, selectively driving the second support plate 20 away from or close to the first support plate 10 in the front-to-back direction.

[0043] Specifically, because the first support plate 10 is fixedly connected to the seat, the drive member 30 is fixedly connected to the first support plate 10, and thus the drive member 30 is fixedly arranged. When the drive member 30 drives the transmission assembly 40 to rotate, the other end of the transmission assembly 40 becomes the center of rotation, and one end of the transmission assembly 40 rotates, selectively moving the one end of the transmission assembly 40 closer to or farther from the first support plate 10 in the front-to-back direction. Furthermore, because one end of the transmission assembly 40 is connected to the second support plate 20, the one end of the transmission assembly 40 and the second support plate 20 can slide in the left-right direction. Thus, during the rotation process, the transmission assembly 40 can apply a force to the second support plate 20. This force, on the one hand, drives the one end of the transmission assembly 40 and the second support plate 20 to slide in the left-to-right direction, and on the other hand, drives the second support plate 20 to move in the front-to-back direction, thereby driving the second support plate 20 away from or closer to the first support plate 10 in the front-to-back direction.

[0044] Specifically, by controlling the operation of the driver 30, the second support plate 20 can be selectively moved away from or closer to the first support plate 10 in the front-to-back direction, allowing the lumbar support adjustment device 100 to switch between a closed state and an elevated state. It should be noted that the elevated state is not unique; users can select different elevation distances and remain 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.

[0045] Furthermore, the seat's lumbar support adjustment device 100 can independently adjust the fore-aft movement of the second support plate 20, making it suitable for sectional seats. Furthermore, the second support plate 20 can be raised to a greater extent, resulting in smoother operation and a better user experience. Furthermore, the seat's lumbar support adjustment device 100 has a simple and compact structure, with a small fore-aft dimension, meeting the requirements of ultra-thin new energy seats.

[0046] Therefore, by optimizing the lumbar support adjustment device 100 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 a simple and compact structure, meet the layout requirements of segmented backrest seats, and meet the layout requirements of new energy ultra-thin seats.

[0047] Combine Figure 4-Figure 7 As shown, the driving member 30 is a motor, and the motor is provided with a motor shaft 31 . The transmission assembly 40 may include: a transmission rod 41 , one end of which is fixedly connected to the motor shaft 31 .

[0048] Specifically, the driving member 30 can be configured as a motor, and only one end of the transmission rod 41 needs to be fixedly connected to the motor shaft 31. In this way, when the motor drives the motor shaft 31 to rotate, it can also drive the transmission rod 41 to rotate, thereby realizing a transmission connection between the driving member 30 and the transmission assembly 40. This not only simplifies the structure of the driving member 30 and the transmission assembly 40, but also makes the transmission connection between the driving member 30 and the transmission assembly 40 more stable and reliable. It is understandable that the forward or backward movement of the second support plate 20 can be controlled by simply controlling the rotation direction of the motor, which will not be explained in detail here.

[0049] Combine Figure 4-Figure 8 As shown, the transmission assembly 40 can also include: a first sliding part 42, the first sliding part 42 is rotatably connected to the other end of the transmission rod 41, and a second sliding part 21 is provided on the second support plate 20, and the second sliding part 21 is connected to the first sliding part 42 and slides with the first sliding part 42 in the left and right directions.

[0050] With this arrangement, when the motor drives the transmission rod 41 to rotate, power can be transmitted to the second sliding portion 21 through the first sliding portion 42, and then to the second support plate 20. It is also understandable that, due to the rotatable connection of the first sliding portion 42 to the other end of the transmission rod 41, the first sliding portion 42 can rotate relative to the motor shaft 31 while being driven by the transmission rod 41, and can also rotate relative to the transmission rod 41 in a sliding fit with the second sliding portion 21. That is, the first sliding portion 42 can fit between the transmission rod 41 and the second sliding portion 21, thereby ensuring a sliding fit area between the transmission assembly 40 and the second sliding portion 21, thereby making the sliding fit between the transmission assembly 40 and the second support plate 20 more stable and reliable, and thus making the operation of the second support plate 20 more stable and reliable.

[0051] Combine Figure 4-Figure 8 As shown, one of the first sliding portion 42 and the second sliding portion 21 is a slider, and the other is a slide groove. Either the slider or the slide groove is extended in the left-right direction and slidably matched with the other.

[0052] Specifically, by setting one of the first sliding part 42 and the second sliding part 21 as a second slider and the other as a slide groove, and extending any one of the slider and the slide groove in the left and right directions, it is only necessary to slide it with the other one to achieve the sliding fit between the first sliding part 42 and the second sliding part 21. This not only makes the sliding fit between the first sliding part 42 and the second sliding part 21 simpler to achieve, but also makes the sliding fit between the first sliding part 42 and the second sliding part 21 more stable and reliable.

[0053] Combine Figure 4-Figure 8 As shown, the second sliding portion 21 is a slide groove, which is extended in the left-right direction. Limiting members 22 are respectively provided at both ends of the slide groove in the left-right direction. The limiting members 22 selectively cooperate with the slider to limit the position.

[0054] Specifically, the second sliding portion 21 can be set as a slide groove, which extends in the left and right directions, and correspondingly, the first sliding portion 42 can be set as a slider. In this way, the structural design of the first sliding portion 42 and the second sliding portion 21 can be optimized, so that the structure of the second sliding portion 21 is adapted to the second support plate 20, and the volume of the first sliding portion 42 is smaller, thereby further improving the structural compactness and reliability of the seat lumbar support adjustment device 100.

[0055] Furthermore, when the slider slides relative to the chute, there is a risk of it falling off the left or right end of the chute. By providing a stopper 22 at the end of the drive screw away from the motor, the slider can engage with the stopper 22 when it slides to the left or right end of the chute, thereby preventing further movement of the slider. This reminds the user to adjust the lumbar support properly, prevents the slider from falling off the chute, and prevents failure of the first sliding portion 42 and the second sliding portion 21. This can further improve the reliability of the seat lumbar support adjustment device 100 and enhance the user experience.

[0056] Combine Figures 1-6 As shown, the lumbar support adjustment device 100 for a seat may further include a connecting rod assembly 50, the ends of which are rotatably connected to the first support plate 10 and the second support plate 20. Thus, when the transmission assembly 40 drives the second support plate 20 to move in the front-to-back direction, the connecting rod assembly 50 also rotates relative to the first support plate 10 and the second support plate 20, and the connecting rod assembly 50 can be supported between the first support plate 10 and the second support plate 20.

[0057] In some embodiments of the present invention, there are at least two connecting rod assemblies 50 , and the at least two connecting rod assemblies 50 are spaced apart and disposed on both sides of the transmission assembly 40 in the left and right directions.

[0058] Specifically, considering that the second support plate 20 is extended in the left-right direction, the transmission assembly 40 slides with the second support plate 20 in the left-right direction, and the contact area between one end of the transmission assembly 40 and the second support plate 20 is small, the transmission assembly 40 slides with the second support plate 20 in the left-right direction to drive the second support plate 20 to move in the front-back direction. In this process, the operating stability of the second support plate 20 is insufficient.

[0059] By arranging at least two connecting rod assemblies 50 on both sides of the transmission assembly 40 in the left and right directions, in the process of the transmission assembly 40 driving the second support plate 20 to move in the front and rear directions, at least two connecting rod assemblies 50 can support the second support plate 20 in the left and right directions respectively. On the premise of ensuring that the second support plate 20 can move back and forth, the force on the second support plate 20 can be made more uniform, so that the operation of the second support plate 20 can be more stable and reliable, the reliability of the seat's lumbar support adjustment device 100 can be improved, and the supporting effect of the second support plate 20 on the human waist can be improved.

[0060] It should be noted that when at least two connecting rod assemblies 50 are spaced apart on both sides of the transmission assembly 40 in the left and right directions, at least two connecting rod assemblies 50 can be simultaneously located on the upper side of the transmission assembly 40 in the up and down directions, and at least two connecting rod assemblies 50 can also be simultaneously located on the lower side of the transmission assembly 40 in the up and down directions, which will not be elaborated here.

[0061] Moreover, when at least two connecting rod assemblies 50 are spaced apart on both sides of the transmission assembly 40 in the left and right directions, at least two connecting rod assemblies 50 can also be respectively located on both sides of the transmission assembly 40 in the up and down directions, that is, at least two connecting rod assemblies 50 can be located at diagonally opposite positions of the transmission assembly 40.

[0062] Specifically, considering that the second support plate 20 extends not only in the left-right direction but also in the up-down direction, at least two connecting rod assemblies 50 are spaced apart on both sides of the transmission assembly 40 in the left-right direction, and the at least two connecting rod assemblies 50 are also located on both sides of the transmission assembly 40 in the up-down direction. In this way, when the transmission assembly 40 drives the second support plate 20 to move in the front-back direction, the at least two connecting rod assemblies 50 support the second support plate 20 not only in the left-right direction but also in the up-down direction.

[0063] In this way, under the premise of ensuring that the second support plate 20 can move forward and backward, the force on the second support plate 20 can be made more uniform not only in the left and right directions but also in the up and down directions, thereby making the operation of the second support plate 20 more stable and reliable, and improving the reliability of the seat's lumbar support adjustment device 100, and improving the supporting effect of the second support plate 20 on the human waist.

[0064] In some other embodiments of the present invention, there are at least two connecting rod assemblies 50 , and the at least two connecting rod assemblies 50 are spaced apart and disposed on both sides of the transmission assembly 40 in the up-down direction.

[0065] Specifically, considering that the second support plate 20 is also extended in the vertical direction, by arranging at least two connecting rod assemblies 50 at intervals on both sides of the transmission assembly 40 in the vertical direction, when the transmission assembly 40 drives the second support plate 20 to move in the front-rear direction, the at least two connecting rod assemblies 50 can respectively support the second support plate 20 in the vertical direction. Under the premise of ensuring that the second support plate 20 can move back and forth, the force applied to the second support plate 20 can be made more uniform, thereby making the operation of the second support plate 20 more stable and reliable, thereby improving the reliability of the lumbar support adjustment device 100 of the seat and enhancing the supporting effect of the second support plate 20 on the human waist.

[0066] It should be noted that when at least two connecting rod assemblies 50 are spaced apart on both sides of the transmission assembly 40 in the up and down directions, at least two connecting rod assemblies 50 can correspond to each other in the up and down directions, that is, at least two connecting rod assemblies 50 are located on the same side in the left and right directions, which will not be elaborated here.

[0067] Furthermore, when at least two connecting rod assemblies 50 are spaced apart on both sides of the transmission assembly 40 in the vertical direction, the at least two connecting rod assemblies 50 can also be staggered in the vertical direction, that is, at least two connecting rod assemblies 50 are located on both sides in the left-right direction, that is, at least two connecting rod assemblies 50 can be located at diagonally opposite positions of the transmission assembly 40. This solution is the same as the above and will not be described in detail here.

[0068] In a specific embodiment of the present invention, Figures 1-6 As shown, there are four connecting rod assemblies 50. Two of the four connecting rod assemblies 50 are connected to one side of the first support plate 10 and the second support plate 20 in the vertical direction, and are spaced apart on both sides of the transmission assembly 40 in the left-right direction. The other two of the four connecting rod assemblies 50 are connected to the other side of the first support plate 10 and the second support plate 20 in the vertical direction, and are spaced apart on both sides of the transmission assembly 40 in the left-right direction. In this way, the four connecting rod assemblies 50 can be respectively disposed adjacent to the upper left end, lower left end, upper right end, and lower right end of the second support plate 20, making the force applied to the second support plate 20 more uniform not only in the left-right direction but also in the vertical direction, thereby further improving the operating stability of the second support plate 20 and enhancing the reliability of the seat lumbar support adjustment device 100.

[0069] Combine Figures 1-6 As shown, the connecting rod assembly 50 may include: a first connecting rod 51 and a second connecting rod 52, one end of the first connecting rod 51 and one end of the second connecting rod 52 are rotatably connected, the other end of the first connecting rod 51 is rotatably connected to the first support plate 10, and the other end of the second connecting rod 52 is rotatably connected to the second support plate 20.

[0070] Thus, when the transmission assembly 40 drives the second support plate 20 to move in the front-to-back direction, selectively approaching or moving away from the first support plate 10, not only can the first connecting rod 51 and the second connecting rod 52 rotate relative to the first support plate 10 and the second support plate 20, but the first connecting rod 51 and the second connecting rod 52 can also rotate relative to each other. In other words, the first connecting rod 51 and the second connecting rod 52 can be extended and retracted to adapt to the movement of the second support plate 20 in the front-to-back direction. This makes the structure of the connecting rod assembly 50 simpler and more reliable while ensuring the lifting range of the lumbar support.

[0071] The chair 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 from the backrest, and is connected to the second support plate 20. This allows for a segmented design of the chair, allowing the lumbar support adjustment device 100 to selectively control forward and backward 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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 first support plate (10), the first support plate (10) extending in the left-right direction and suitable for connection with the seat; a second support plate (20), the second support plate (20) extending in the left-right direction and spaced apart from the first support plate (10) in the front-back direction, the second support plate (20) being suitable for connection with a lumbar support of the seat; a driving member (30), the driving member (30) being arranged between the first support plate (10) and the second support plate (20) and connected to the first support plate (10); A transmission assembly (40), wherein the transmission assembly (40) is arranged between the first support plate (10) and the second support plate (20), one end of the transmission assembly (40) is connected to the second support plate (20), and one end of the transmission assembly (40) is slidable in the left and right directions relative to the second support plate (20), and the driving member (30) is transmission-connected to the other end of the transmission assembly (40) and drives the transmission assembly (40) to rotate, so as to selectively drive the second support plate (20) away from or close to the first support plate (10) in the front-back direction.

2. The lumbar support adjustment device for a seat according to claim 1, characterized in that: The driving member (30) is a motor, and the motor is provided with a motor shaft (31). The transmission assembly (40) comprises a transmission rod (41), and one end of the transmission rod (41) is fixedly connected to the motor shaft (31).

3. The lumbar support adjustment device for a seat according to claim 2, characterized in that: The transmission assembly (40) further includes: a first sliding portion (42), the first sliding portion (42) being rotatably connected to the other end of the transmission rod (41); a second sliding portion (21) being provided on the second support plate (20), the second sliding portion (21) being connected to the first sliding portion (42) and slidingly engaged with the first sliding portion (42) in the left-right direction.

4. The lumbar support adjustment device for a seat according to claim 3, characterized in that: One of the first sliding part (42) and the second sliding part (21) is a slider, and the other is a slide groove. Either the slider or the slide groove is extended in the left-right direction and slidably matched with the other.

5. The lumbar support adjustment device for a seat according to claim 4, characterized in that: The second sliding portion (21) is a sliding groove, which is extended in the left-right direction. Limiting members (22) are respectively provided at both ends of the sliding groove in the left-right direction, and the limiting members (22) are selectively matched with the sliding block for limiting.

6. The lumbar support adjustment device for a seat according to claim 1, characterized in that: Also includes: Connecting rod assemblies (50), there are at least two connecting rod assemblies (50), at least two connecting rod assemblies (50) are spaced apart on both sides of the transmission assembly (40) in the left-right direction, and / or at least two connecting rod assemblies (50) are spaced apart on both sides of the transmission assembly (40) in the up-down direction, and both ends of the connecting rod assemblies (50) are rotatably connected to the first support plate (10) and the second support plate (20), respectively.

7. The lumbar support adjustment device for a seat according to claim 6, characterized in that: There are four connecting rod assemblies (50), two of the four connecting rod assemblies (50) are connected to one side of the first support plate (10) and the second support plate (20) in the up-down direction and are spaced apart on both sides of the left-right direction of the transmission assembly (40), and the other two of the four connecting rod assemblies (50) are connected to the other side of the first support plate (10) and the second support plate (20) in the up-down direction and are spaced apart on both sides of the left-right direction of the transmission assembly (40).

8. The lumbar support adjustment device for a seat according to claim 6, characterized in that: The connecting rod assembly (50) comprises: a first connecting rod (51) and a second connecting rod (52), one end of the first connecting rod (51) and one end of the second connecting rod (52) are rotatably connected, the other end of the first connecting rod (51) is rotatably connected to the first support plate (10), and the other end of the second connecting rod (52) is rotatably connected to the second support plate (20).

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 second support plate (20).

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

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