Lumbar support adjustment device and seat with it

Abstract

This utility model discloses a lumbar support adjustment device and a seat having the same. The lumbar support adjustment device is used in a seat, which includes a backrest and a lumbar support arranged in a first direction. The lumbar support adjustment device includes: a backrest connector adapted to be connected to the backrest; a lumbar support connecting assembly adapted to be connected to the lumbar support; and an adjustment assembly disposed between the backrest connector and the lumbar support connecting assembly, including: an adjustment member elastically deformable along the first direction, one end of which is connected to the lumbar support connecting assembly; and a drive mechanism configured to drive the other end of the adjustment member to move along the first direction to change the compression amount of the adjustment member. According to this utility model, the lumbar support adjustment device allows users to flexibly adjust the lumbar support's support pressure on the lower back as needed through the drive mechanism, thereby making the user more comfortable when sitting in the seat, improving the user experience, and enabling the seat to better meet the needs of diverse user groups.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, and in particular to a lumbar support adjustment device and a seat having the same. Background Technology

[0002] With social development and technological progress, people's material living standards have greatly improved, and they are paying more and more attention to comfort and a good living experience in their daily lives. Today, the adjustable backrest function of chairs is becoming increasingly important for improving user comfort and health support. Adjustable functions are increasingly being integrated or added to office chairs, car seats, and furniture seating to meet people's ever-increasing demands for seating comfort and personalization.

[0003] In related technologies, lumbar support is usually provided on the seat back to directly support the user. However, the user cannot change the support pressure according to actual needs when adjusting the seat, which makes it difficult for the seat to provide appropriate support. This can easily cause back fatigue and poor user comfort. Furthermore, it is not easy to adapt to the seating needs of users with different body types and occupations. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a lumbar support adjustment device, which allows users to adjust the lumbar support pressure as needed, thereby enabling the seat to provide appropriate support, making the user more comfortable, improving the user experience, and better meeting the usage needs of diverse user groups.

[0005] This utility model also proposes a seat with the above-mentioned lumbar support adjustment device.

[0006] According to a first aspect of the present invention, a lumbar support adjustment device is used for a seat, the seat including a backrest and a lumbar support arranged in a first direction. The lumbar support adjustment device includes: a backrest connector adapted to be connected to the backrest; a lumbar support connecting assembly adapted to be connected to the lumbar support; and an adjustment assembly disposed between the backrest connector and the lumbar support connecting assembly, including: an adjustment member elastically deformable along the first direction, one end of the adjustment member being connected to the lumbar support connecting assembly; and a drive mechanism configured to drive the other end of the adjustment member to move along the first direction to change the compression amount of the adjustment member.

[0007] According to the lumbar support adjustment device of this utility model, by setting an adjustment component, the adjustment component is provided with an adjustment member and a drive mechanism. One end of the adjustment member is connected to the lumbar support connecting component, and the drive mechanism is configured to drive the other end of the adjustment member to move along a first direction to change the compression amount of the adjustment member. This allows the force exerted by the adjustment member on the lumbar support connecting component to be flexibly adjusted. As a result, the user can flexibly adjust the support pressure of the lumbar support on the back as needed through the drive mechanism, making the user more comfortable when sitting in the seat and improving the user experience. This allows the seat to better meet the usage needs of diverse user groups.

[0008] In some embodiments of this utility model, the driving mechanism includes: a fixed rod extending along the first direction and fixedly connected to the backrest connector; and a transmission member sleeved on the fixed rod, with the other end of the adjusting member abutting against the transmission member, the transmission member being configured to thread-fit the fixed rod to move along the first direction.

[0009] In one embodiment of the present invention, the transmission member is provided with a mounting groove on its radially inner side, the mounting groove being open on one side in the first direction, the drive mechanism further includes a nut, the nut being disposed in the mounting groove, and the nut being threadedly connected to the fixing rod.

[0010] In some examples of this utility model, the driving mechanism further includes a first limiting member, which is connected to the fixed rod. The first limiting member is located at one end of the orientation adjustment member of the fixed rod and is used to limit the relative movement of the fixed rod and the transmission member in the first direction.

[0011] In one embodiment of this utility model, the adjustment assembly further includes a housing connected to the backrest connector. The housing has a receiving cavity that is open at both ends in the first direction. The adjustment member, the fixing rod, and the transmission member are all disposed within the receiving cavity. The driving mechanism further includes a driving handle and a driving rod. The driving handle is located on one side of the housing in the second direction. The driving rod extends along the second direction and is connected to the driving handle. The driving rod is rotatably inserted through the housing. A worm gear is disposed within the receiving cavity and has a central hole. The driving rod passes through the central hole. The driving rod and the worm gear are engaged in a circumferential upper limit fit in the worm gear. The worm gear meshes with the transmission member for transmission. The second direction is perpendicular to the first direction.

[0012] In some examples of this invention, the cross-section of the drive rod is polygonal.

[0013] In some examples of this utility model, the transmission component includes: a worm segment extending along the first direction, the worm segment meshing with the worm wheel for transmission; and a connecting segment connected to the worm segment and located on the side of the worm segment facing the adjusting member, the adjusting member being a spring, and the other end of the adjusting member being sleeved on the connecting segment.

[0014] In some examples of this utility model, the adjustment assembly further includes: a guide member disposed within the receiving cavity and connected to the housing, the guide member having a guide channel extending along the first direction, the two ends of the guide channel being open; a sliding member slidably disposed within the guide channel along the first direction, the sliding member being connected to the waist support connecting assembly; a transmission mechanism and a locking member, the drive handle and the locking member being connected by the transmission mechanism, wherein, in the second direction, the drive rod enters the receiving cavity from one side of the housing and exits from the other side of the housing, the drive handle is movable between a locked position and an unlocked position, in the locked position, the locking member locks the sliding member, and in the unlocked position, the locking member moves away from the sliding member.

[0015] In one example of this utility model, the sliding member includes a plurality of locking grooves, which are spaced apart along the first direction. The locking member extends along the second direction, and one end of the locking member is rotatably disposed on the guide member about an axis extending along the first direction. The other end of the locking member is provided with a locking protrusion. The guide member is provided with a clearance hole that communicates with the guide channel. When the drive handle is in the locked position, the locking protrusion extends into the locking groove. When the drive handle is in the unlocked position, the locking protrusion moves away from the locking groove.

[0016] In some specific embodiments of this utility model, the drive handle, the transmission mechanism, and the locking member are disposed on the same side of the guide member in a third direction. The guide member is provided with a fixed post. The transmission mechanism includes: a transmission rod extending along the second direction, the transmission rod extending into the receiving cavity from one side of the housing and exiting from the other side of the housing, and in the first direction, the transmission rod is disposed between the drive rod and the locking member; a first connecting member, the first connecting member and the drive handle are disposed on the same side of the housing in the second direction, the first connecting member is connected to the drive handle and the transmission rod, and the drive handle is... The first connector is rotatable and is limited to the drive handle in the second direction. A locking torsion spring is sleeved on the fixed post and extends along the third direction. In the first direction, the locking torsion spring is located between the locking member and the transmission rod. The two ends of the locking torsion spring are respectively formed with a first arm and a second arm extending along the first direction. The first arm is connected to the transmission rod, and the second arm is connected to the other end of the locking member. The locking torsion spring is configured to drive the locking member to rotate about an axis extending along the first direction. The third direction intersects both the second direction and the first direction.

[0017] In one specific embodiment of this utility model, the transmission mechanism further includes a fixing sleeve, which is disposed within the receiving cavity. The fixing sleeve is sleeved on and connected to the transmission rod. The fixing sleeve has a fixing part, and the first arm is fixedly connected to the fixing part. When the drive handle is in the locked position, the fixing sleeve abuts against the side wall of the receiving cavity opposite to the drive handle in the second direction. When the drive handle is in the unlocked position, the fixing sleeve abuts against the side wall of the receiving cavity facing the drive handle in the second direction.

[0018] In one example of this utility model, the slider is provided with a clearance channel, the clearance channel extends along the first direction and is open at both ends, and one end of the adjusting member extends into the clearance channel to abut against the lumbar support connecting assembly.

[0019] In some specific embodiments of this utility model, the sliding member is provided with a limiting hole, the limiting hole is provided on at least one side of the sliding member in the second direction, the limiting hole extends along the first direction, the guide member is provided with a through hole, the housing is provided with a fixing hole, and the adjusting assembly further includes a second limiting member, the second limiting member is provided in the fixing hole and passes through the through hole to limit and cooperate with the limiting hole.

[0020] In some specific embodiments of this utility model, the lumbar support connecting assembly includes a second connecting member, which is connected to the sliding member. The second connecting member is provided with a guide rod, which extends into the clearance channel along the first direction. The adjusting member is a spring, and the other end of the adjusting member is sleeved on the guide rod.

[0021] In one specific embodiment of this utility model, the second connector is provided with a receiving groove, the receiving groove being open on the side opposite to the sliding member in the first direction. The lumbar support connecting assembly further includes: a support member adapted to be connected to the lumbar support, the support member being provided with a mating groove, the second connector extending into the mating groove along the first direction, and one side of the mating groove being open in a third direction, the end of the support member having the open side in the third direction being rotatably connected to the second connector via a rotating shaft extending along the second direction; and an elastic member disposed in the receiving groove and elastically deformable along the first direction, the two ends of the elastic member abutting against the bottom wall of the receiving groove and the bottom wall of the mating groove, respectively, wherein the elastic member is configured to always apply an elastic force to the support member.

[0022] According to a second aspect of the present invention, a seat includes a backrest and a lumbar support; according to a first aspect of the present invention, a lumbar support adjustment device is used to mount the lumbar support on the backrest.

[0023] According to the present invention, the seat, by providing the lumbar support adjustment device of the first aspect, and by providing an adjustment component, the adjustment component includes an adjustment member and a drive mechanism. One end of the adjustment member is connected to the lumbar support connecting component, and the drive mechanism is configured to drive the other end of the adjustment member to move along a first direction to change the compression amount of the adjustment member. This allows the force exerted by the adjustment member on the lumbar support connecting component to be flexibly adjusted, so that the user can flexibly adjust the lumbar support pressure on the back and waist as needed through the drive mechanism. This makes the user more comfortable when sitting in the seat, improves the user experience, and allows the seat to better meet the needs of diverse user groups.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a seat according to an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the seat according to another angle of an embodiment of the present utility model;

[0027] Figure 3 yes Figure 2 The cross-sectional view at point AA shown;

[0028] Figure 4 yes Figure 3 A magnified schematic diagram of a portion at point B shown in the image;

[0029] Figure 5 This is a schematic diagram of the lumbar support adjustment device according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the lumbar support adjustment device according to an embodiment of the present utility model after the cover has been removed;

[0031] Figure 7 This is a schematic diagram of the lumbar support adjustment device according to an embodiment of the present utility model after the housing has been removed;

[0032] Figure 8 This is a schematic diagram of the lumbar support adjustment device according to an embodiment of the present invention after the housing has been removed, from another angle.

[0033] Figure 9 This is a schematic diagram of the lumbar support adjustment device according to an embodiment of the present utility model after removing the housing and support members;

[0034] Figure 10 This is a schematic diagram of a slider according to an embodiment of the present utility model;

[0035] Figure 11 This is a schematic diagram of a locking member according to an embodiment of the present utility model.

[0036] Figure label:

[0037] 10. Backrest connector;

[0038] 20. Adjustment components;

[0039] 21. Shell; 2101. Receiving cavity; 211. Main shell; 212. Cover;

[0040] 22. Guide component; 221. Fixing post;

[0041] 23. Sliding component; 2301. Clearance channel; 231. Locking groove; 232. Limiting hole;

[0042] 241. Drive handle; 242. Drive rod; 243. Worm gear; 244. Transmission component; 245. Fixed rod; 246. First limiting component; 247. Nut;

[0043] 25. Transmission mechanism; 251. First connecting piece; 252. Transmission rod; 253. Fixing sleeve; 254. Locking torsion spring;

[0044] 26. Adjusting component; 27. Locking component; 271. Locking protrusion; 28. Mounting base;

[0045] 30. Lumbar support connecting assembly; 31. Second connecting piece; 32. Support piece; 33. Elastic piece;

[0046] 100. Lumbar support adjustment device; 200. Backrest; 300. Lumbar support;

[0047] 1000, Seats. Detailed Implementation

[0048] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0049] First, refer to Figures 1-3 A brief description of a seat 1000 according to a second aspect embodiment of the present invention is provided. The seat 1000 includes a backrest 200, a lumbar support 300, and a lumbar support adjustment device 100. The lumbar support 300 is mounted on the backrest 200 via the lumbar support adjustment device 100. When a user sits on the seat 1000, their back can rest against the lumbar support 300. The backrest 200, the lumbar support 300, and the lumbar support adjustment device 100 support the user's back. The backrest 200 and the lumbar support 300 are arranged in a first direction. For example, the first direction can be the front-back direction of the seat 1000. The lumbar support 300 can be located in front of the backrest 200 to support the user's back.

[0050] The following is for reference. Figures 1-11 Description of a lumbar support adjustment device 100 according to a first aspect embodiment of the present invention.

[0051] like Figures 1-11 As shown, the lumbar support adjustment device 100 according to the first aspect of the present invention includes: a backrest connector 10, a lumbar support connecting assembly 30, and an adjustment assembly 20.

[0052] Specifically, the backrest connector 10 is adapted to be connected to the backrest 200; the lumbar support connector 30 is adapted to be connected to the lumbar support 300; the adjustment assembly 20 is disposed between the backrest connector 10 and the lumbar support connector 30, and includes an adjustment member 26 and a drive mechanism, the adjustment member 26 being along a first direction (e.g., Figure 4 The adjusting member 26 (shown in the front-back direction) is elastically deformable, with one end connected to the lumbar support connecting assembly 30; the drive mechanism is configured to drive the other end of the adjusting member 26 to move along the first direction to change the compression of the adjusting member 26.

[0053] In this embodiment, a backrest connector 10 and a lumbar support 300 connector are provided. The structure is simple and facilitates the assembly and connection of the lumbar support adjustment device 100 with the backrest 200 and the lumbar support 300, meeting the assembly and use requirements of the seat 1000. For example, the backrest connector 10 can slide with the backrest 200 so that the lumbar support 300 connector can move along the backrest 200 in the vertical direction. This allows the position of the lumbar support 300 installed on the lumbar support adjustment device 100 in the vertical direction to be adjusted more flexibly as needed, making the user more comfortable when sitting in the seat 1000.

[0054] In this embodiment, an adjustment component 20 is provided, which is positioned between the backrest connector 10 and the lumbar support connector 30. The arrangement is reasonable, and the adjustment component 20 can connect the backrest connector 10 and the lumbar support connector 30. For example, the adjustment component 20 can be fixedly connected to the backrest connector 10 or detachably connected, so that the adjustment component 20 can be stably installed on the backrest 200 through the backrest connector 10. The lumbar support connector 30 can be connected to the adjustment component 20 and can move relative to the adjustment component 20 in a first direction, so that the lumbar support 300 can be installed on the adjustment component 20 and then on the backrest 200 through the lumbar support connector 30. The lumbar support 300 can be supported by the backrest 200 through the lumbar support connector 30, the adjustment component 20 and the backrest connector 10, so that the lumbar support 300 can provide support for the user and meet the usage needs of the seat 1000.

[0055] In this embodiment, the adjustment component 20 is provided with an adjustment member 26. The adjustment member 26 is elastically deformable along a first direction. One end of the adjustment member 26 is connected to the lumbar support connecting component 30. The drive mechanism drives the other end of the adjustment member 26 to move along the first direction to change the compression amount of the adjustment member 26. When the user sits in the seat 1000, after the user leans against the lumbar support 300 and the position of the lower back in the first direction is adjusted to a suitable position, if the user wants to increase the support pressure of the lumbar support 300 on the lower back, the drive mechanism can drive the other end of the adjustment member 26 to move along the first direction toward the lumbar support connecting component 300, thereby increasing the compression amount of the adjustment member 26. The force exerted by the adjusting member 26 on the lumbar support connecting assembly 30 in the first direction is increased, thereby increasing the support pressure of the lumbar support 300 on the user's back. When the user wants the lumbar support 300 to have less support pressure, the drive mechanism can control the other end of the adjusting member 26 to move away from the lumbar support connecting assembly 30 in the first direction to reduce the compression of the adjusting member 26 and reduce the force exerted by the adjusting member 26 on the lumbar support connecting assembly 30. This allows the user to flexibly and personally adjust the support pressure of the lumbar support 300 on their back according to their individual needs, making the user's ride more comfortable and improving their riding experience.

[0056] It is understandable that users of different body types or in different usage scenarios have different support needs for the backrest 200. In this embodiment, by adjusting the settings of the adjustment component 20, different users can make personalized adjustments to the lumbar support 300 for their backs through the drive mechanism when sitting in the seat 1000. This allows the seat 1000 to meet the needs of different users and better adapt to their seating needs, thereby satisfying the needs of a diverse user group and improving the user experience.

[0057] According to the embodiment of the present utility model, the lumbar support adjustment device 100 is provided with an adjustment component 20, which includes an adjustment member 26 and a drive mechanism. One end of the adjustment member 26 is connected to the lumbar support connecting component 30. The drive mechanism is configured to drive the other end of the adjustment member 26 to move along a first direction to change the compression amount of the adjustment member 26. This allows the force exerted by the adjustment member 26 on the lumbar support connecting component 30 to be flexibly adjusted. As a result, the user can flexibly adjust the support pressure of the lumbar support 300 on the back and waist as needed through the drive mechanism. This makes the user more comfortable when sitting in the seat 1000 and provides a better user experience, so that the seat 1000 can well meet the usage needs of diverse user groups.

[0058] In some embodiments of this utility model, such as Figure 4 As shown, the drive mechanism may include: a fixed rod 245 and a transmission member 244. The fixed rod 245 extends along a first direction and is fixedly connected to the backrest connector 10. The transmission member 244 is sleeved on the fixed rod 245, and the other end of the adjusting member 26 abuts against the transmission member 244. The transmission member 244 is configured to be threadedly engaged with the fixed rod 245 to move along the first direction.

[0059] In this embodiment, the driving mechanism includes a fixed rod 245 and a transmission component 244. The fixed rod 245 extends along a first direction and is fixedly connected to the backrest connector 10. For example, when the fixed rod 245 and the backrest connector 10 are metal parts, one end of the fixed rod 245 facing the backrest connector 10 can be welded and fixed to the backrest connector 10. When the fixed rod 245 and the backrest 200 connector are plastic parts, the fixed rod 245 and the backrest connector 10 can be glued and fixed, etc.

[0060] In this embodiment, the transmission component 244 is sleeved on the fixed rod 245 and abuts against the other end of the adjusting component 26. The transmission component 244 and the fixed rod 245 are threaded together to move along the first direction. The structure is simple and the transmission is stable. When the adjusting component 26 needs to increase the compression, the transmission component 244 can gradually press towards the adjusting component 26 along the first direction by rotating around the fixed rod 245, thereby gradually increasing the compression of the adjusting component 26 and thus increasing the support pressure of the lumbar support 300 on the user's back. When the adjusting component 26 needs to decrease the compression, the transmission component 244 moves along the first direction. The reverse rotation around the fixed rod 245 gradually reduces the compression of the adjusting member 26, thus meeting the usage requirements of the adjusting assembly 20. The transmission member 244 is threadedly engaged with the fixed rod 245, ensuring stable transmission and accurate adjustment. Furthermore, the threaded engagement between the transmission member 244 and the fixed rod 245 provides a self-locking function, allowing the adjusting member 26 to maintain a stable compression state after adjustment. This self-locking mechanism ensures that the adjusting assembly 20 can more stably and reliably adjust and provide stable support pressure when adjusting the lumbar support 300's support pressure on the user's back. Optionally, the fixed rod 245 can be a screw.

[0061] In one embodiment of this utility model, such as Figure 4 As shown, the transmission component 244 has a mounting groove on its radial inner side, which is open on one side in the first direction. The drive mechanism may also include a nut 247, which is located in the mounting groove and is threadedly connected to the fixing rod 245.

[0062] In this embodiment, a mounting groove is provided on the radial inner side of the transmission component 244, and a nut 247 is provided on the drive mechanism. The nut 247 is set in the mounting groove and is threadedly connected to the fixed rod 245. The structure is simple. The transmission component 244 can achieve the cooperation with the fixed rod 245 through the threaded cooperation between the nut 247 and the fixed rod 245. This avoids the need to directly machine the threaded structure of the transmission component 244 to cooperate with the fixed rod 245. The transmission component 244 can meet the threaded cooperation requirements of the fixed rod 245 by assembling with the nut 247, which makes the processing and production of the transmission component 244 more convenient and easier. The transmission component 244 is sleeved on the fixed rod 245. The cavity formed on the radial inner side of the transmission component 244 extends along the first direction and is open at both ends. The mounting groove is open on one side of the first direction, which facilitates the assembly of the nut 247 and the transmission component 244. The shape of the mounting groove can match the shape of the nut 247 so that the nut 247 can be stably installed in the mounting groove and engage with the nut 247 in the circumferential upper limit of the fixed rod 245. When the transmission component 244 rotates around the fixed rod 245, the nut 247 can rotate stably around the fixed rod 245.

[0063] In some examples of this utility model, such as Figure 4As shown, the drive mechanism may further include a first limiting member 246, which is connected to the fixed rod 245. The first limiting member 246 is located at one end of the fixed rod 245 facing the adjusting member 26, and is used to limit the relative movement of the fixed rod 245 and the transmission member 244 in the first direction.

[0064] In this embodiment, the drive mechanism is provided with a first limiting member 246. The first limiting member 246 is connected to the fixed rod 245 and is located at one end of the fixed rod 245 facing the adjusting member 26. The first limiting member 246 restricts the relative movement of the fixed rod 245 and the transmission member 244 in the first direction. The structure is simple and can effectively prevent the transmission member 244 from moving excessively in the first direction toward the waist support connecting assembly 30, causing the nut 247 to disengage from the fixed rod 245. At this time, the transmission member 244 can work stably and reliably with the fixed rod 245, thereby improving the operational stability and reliability of the adjusting assembly 20.

[0065] In one example of this utility model, reference is made to Figure 4 As shown, the open side of the mounting groove can face the backrest connector 10. One end of the fixing rod 245 facing the backrest 200 connector can form a limiting end. The limiting end and the side surface of the nut 247 facing the backrest connector 10 are in a limiting fit in the first direction. The radial inner side of the transmission member 244 can also form a first clearance groove and a second clearance groove. The first clearance groove is located on the open side of the mounting groove and communicates with the mounting groove. The clearance groove forms an opening at one end of the transmission member 244 facing the backrest connector 10. The second clearance groove is located on the side of the mounting groove away from the backrest connector 10. The clearance groove forms an opening at one end of the transmission member 244 away from the backrest connector 10. The bottom wall of the mounting groove forms a through hole. The through hole extends along the first direction and communicates the mounting groove and the second clearance groove. The limiting section of the fixing rod 245 is located in the first clearance groove, and the first limiting member 246 is located in the second clearance groove.

[0066] In this embodiment, a first clearance groove and a second clearance groove are formed on the inner side of the transmission member 244. The limiting end of the fixing rod 245 is arranged in the first clearance groove, and the first limiting member 246 is arranged in the second clearance groove. This makes the overall structure of the transmission member 244, the fixing rod 245, and the first limiting member 246 more compact in the first direction, thereby reducing the space occupied by the fixing rod 245 and the transmission member 244, making the adjustment assembly 20 more convenient to assemble, and giving the transmission member 244 a longer dimension in the first direction.

[0067] In one embodiment of this utility model, such as Figure 4 , Figure 6 , Figure 8 and Figure 9As shown, the adjustment assembly 20 may further include a housing 21, which is connected to the backrest connector 10. The housing 21 has a receiving cavity 2101, which is open at both ends in the first direction. The adjustment member 26, the fixing rod 245, and the transmission member 244 are all disposed within the receiving cavity 2101. The drive mechanism may further include a drive handle 241, a drive rod 242, and a worm gear 243. The drive handle 241 is located in the housing 21 in the second direction (e.g., Figure 6 On one side (shown in the left-right direction), the drive rod 242 extends along the second direction and is connected to the drive handle 241. The drive rod 242 is rotatably inserted through the housing 21. The worm gear 243 is disposed in the receiving cavity 2101. The worm gear 243 has a central hole. The drive rod 242 passes through the central hole. The drive rod 242 and the worm gear 243 are in upper limit engagement in the circumferential direction of the worm gear 243. The worm gear 243 meshes with the transmission component 244 for transmission. The second direction is perpendicular to the first direction.

[0068] In this embodiment, the adjustment component 20 is provided with a housing 21, which is connected to the backrest connector 10. Optionally, the housing 21 and the backrest connector 10 can be fastened together with fasteners to facilitate the assembly and disassembly of the adjustment component 20 and the backrest connector 10. The housing 21 has a receiving cavity 2101, which is open at both ends in the first direction. The adjustment component 26, the fixing rod 245, and the transmission component 244 are all disposed in the receiving cavity 2101. The structure is simple and the arrangement is reasonable. The housing 21 can provide good protection for the adjustment component 26, the fixing rod, and the transmission component 244, and provide a good operating environment for the coordinated operation of the adjustment component 26, the fixing rod, and the transmission component 244, thereby making the adjustment component 20 operate more stably.

[0069] In this embodiment, the drive mechanism is further provided with a drive handle 241, a drive rod 242, and a worm gear 243. The worm gear 243 meshes with the transmission component 244 to drive the transmission, which can change the direction of force transmission. The rotation of the worm gear 243 around the center line extending in the second direction can drive the transmission component 244 to rotate around the center line extending in the first direction. This facilitates the arrangement of the drive handle 241 and the drive rod 242 in the adjustment assembly 20, so that the drive rod 242 passes through the housing 21 along the second direction and passes through the center hole of the worm gear 243 arranged in the housing 21. The drive handle 241 is arranged on the outside of the housing 21 and is located on one side in the second direction. The drive rod 242 and the worm gear 243 are engaged in the upper limit of the circumference of the worm gear 243, so that the worm gear 243 can stably follow the rotation of the drive rod 242. Thus, the drive handle 241 connected to the drive rod 242 can stably drive the transmission component 244 to move along the first direction by rotation.

[0070] When adjusting the support pressure of the lumbar support 300, the user can manually operate the drive handle 241 to rotate, causing the transmission component 244 to rotate spirally around the fixed rod 245 and gradually move along the first direction, thereby adjusting the compression of the adjusting component 26 and adjusting the support pressure of the lumbar support 300 on the lower back. Since the drive handle 241 is located on one side of the housing 21 in the second direction, and is located on the side of the lumbar support 300 opposite to the adjusting component 20 in the first direction when the user is sitting, the user can easily grasp the drive handle 241 to make adjustments, making the operation more convenient and comfortable for the user.

[0071] In some examples of this utility model, references Figure 4 As shown, the cross-section of the drive rod 242 can be polygonal.

[0072] In this embodiment, the cross-section of the drive rod 242 is set as a polygon. For example, the shape of the central hole matches the shape of the drive rod 242, so that after the drive rod 242 passes through the central hole of the worm wheel 243, it can form a limiting fit with the worm wheel 243 in the circumferential direction. This avoids the arrangement of components such as pins and keys, making it more convenient to assemble the drive rod 242 and the worm wheel 243.

[0073] In some examples of this utility model, references Figure 4 As shown, the transmission component 244 may include: a worm segment and a connecting segment. The worm segment extends along a first direction and meshes with the worm wheel 243 for transmission. The connecting segment is connected to the worm segment and is located on the side of the worm segment facing the adjusting member 26. The adjusting member 26 is a spring, and the other end of the adjusting member 26 is sleeved on the connecting segment.

[0074] In this embodiment, the transmission component 244 is provided with a worm section and a connecting section. The worm section meshes with the worm wheel 243 and extends along the first direction, which can meet the transmission needs of the worm wheel 243 and the transmission component 244. When the transmission component 244 moves along the first direction, the worm section can maintain a stable meshing transmission state with the worm wheel 243, thereby enabling the adjustment component 20 to operate stably and reliably.

[0075] In this embodiment, the adjusting member 26 is set as a spring, which has a simple structure and can well meet the usage requirements. The transmission member 244 is provided with a connecting section. For example, the worm gear section and the connecting section can cooperate to form a stepped surface. The stepped surface faces the adjusting member 26 in the first direction, and the other end of the adjusting member 26 can abut against the stepped surface. The other end of the adjusting member 26 is sleeved on the connecting section, which makes the connection between the adjusting member 26 and the transmission member 244 more stable and reliable. Moreover, the connecting section can play a certain guiding role in the deformation of the adjusting member 26 in the first direction, so that the adjusting member 26 can deform stably in the first direction.

[0076] In some examples of this utility model, references Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, the adjustment assembly 20 may also include: a guide 22, a slider 23, a transmission mechanism 25, and a locking element 27.

[0077] Specifically, the guide member 22 is disposed in the receiving cavity 2101 and connected to the housing 21. The guide member 22 has a guide channel extending in the first direction, and the two ends of the guide channel are open. The sliding member 23 is slidably disposed in the guide channel in the first direction and is connected to the waist support connecting assembly 30. The drive handle 241 and the locking member 27 are connected by a transmission mechanism 25. In the second direction, the drive rod 242 enters the receiving cavity 2101 from one side of the housing 21 and exits from the other side of the housing 21. The drive handle 241 is movable between the locked position and the unlocked position. In the locked position, the locking member 27 locks the sliding member 23. In the unlocked position, the locking member 27 moves away from the sliding member 23.

[0078] In this embodiment, the adjustment component 20 is also provided with a guide 22 and a slider 23. The guide 22 is located in the receiving cavity 2101 and connected to the housing 21. For example, the guide 22 and the housing 21 can be fastened together by fasteners. The guide 22 is provided with a guide channel. The slider 23 is slidably located in the guide channel along the first direction and connected to the lumbar support connecting component 30. The guide 22 can play a good guiding role for the slider 23, so that the lumbar support connecting component 30 can move freely along the first direction through the sliding cooperation between the slider 23 and the guide 22. Thus, after the user sits on the seat 1000, the adjustment component 20 can adjust the compression amount of the adjustment component 26 along the first direction, so that the support pressure of the lumbar support 300 on the user's back can be effectively adjusted.

[0079] In this embodiment, the guide channel of the guide member 22 is open at both ends along the first direction, which facilitates the connection and assembly of the slider 23 and the lumbar support connecting assembly 30. The lumbar support connecting assembly 30 can be installed on the adjusting assembly 20 through the slider 23. The arrangement is reasonable and can well meet the assembly needs of the lumbar support adjusting device 100 and the support needs of the lumbar support 300.

[0080] In this embodiment, the drive handle 241 and the locking member 27 are connected by a transmission mechanism 25. The drive rod 242 passes through the receiving cavity 2101 from one side of the housing 21 and exits from the other side of the housing 21 along a second direction. This allows the housing 21 to support the drive rod 242, the worm gear 243 mounted on the drive rod 242, and the drive handle 241, and to maintain a stable positional relationship between the worm gear 243 and the transmission member 244 for meshing and transmission. The drive handle 241 can move between a locked position and an unlocked position in the second direction. Since the worm gear and the transmission member 244 mesh and transmit power in both the first and second directions, the drive rod 242 is movable relative to the worm gear 243 along the second direction, thereby allowing the drive handle 241 to move between the locked and unlocked positions along the second direction.

[0081] When the drive handle 241 is in the locked position, the locking member 27 locks the sliding member 23, fixing the position of the sliding member 23 in the sliding channel, thereby fixing the position of the lumbar support 300 in the first direction. The lumbar support 300 and the adjustment component 20 form a stable connection structure, so that the lumbar support 300 can be stably installed on the backrest 200 through the lumbar support adjustment device 100, thereby providing stable support for the user's back.

[0082] When the drive handle 241 is in the unlocked position, the locking member 27 is away from the sliding member 23, and the sliding member 23 can move freely in the first direction within the sliding channel. The user can control the support pressure of the lumbar support 300 on the lower back as needed through the drive handle 241.

[0083] In this embodiment, the locking and unlocking positions of the drive handle 241 can be reasonably set as needed. The arrangement of the locking and unlocking positions in the second direction can be arranged as needed. For example, when the drive handle 241 moves away from the housing 21 in the second direction, it can move from the locking position to the unlocking position. The drive handle 241 can also move from the locking position to the unlocking position when it moves towards the housing 21 in the second direction.

[0084] When the user needs stable support from the lumbar support 300 or is not using the seat 1000, the user can lock the lumbar support 300 by pulling the drive handle 241 outward in the second direction or pushing the drive handle 241 toward the housing 21. When the user needs to adjust the support pressure of the lumbar support 300, the user can unlock the lumbar support 300 by pushing or pulling the drive handle 241 in the second direction, and then rotate the drive handle 241 for adjustment. The operation is simple, and the adjustment of the lumbar support 300's support pressure on the back and the unlocking and locking of the lumbar support 300 can all be achieved through the drive handle 241. This makes the drive handle 241 versatile and allows the user to perform various operations on the seat 1000 through the operation of the drive handle 241, making the user's operation simpler and more convenient.

[0085] In one example of this utility model, reference is made to Figure 4 and Figure 8 As shown, the adjustment assembly 20 may further include a mounting base 28, which is disposed on the guide member 22, and the locking member 27 is rotatably disposed on the mounting base 28. This facilitates the installation and fixation of the locking member 27 on the guide member 22, making the adjustment assembly 20 easier to assemble, and making the installation of the locking member 27 on the guide member 22 more stable and reliable.

[0086] In one example of this utility model, reference is made to Figure 9 , Figure 10 and Figure 11 As shown, the sliding member 23 includes a plurality of locking grooves 231, which are spaced apart along a first direction. The locking member 27 extends along a second direction. One end of the locking member 27 is rotatably disposed on the guide member 22 about an axis extending along the first direction. The other end of the locking member 27 is provided with a locking protrusion 271. The guide member 22 is provided with a clearance hole that communicates with the guide channel. When the drive handle 241 is in the locked position, the locking protrusion 271 extends into the locking groove 231. When the drive handle 241 is in the unlocked position, the locking protrusion 271 moves away from the locking groove 231.

[0087] In this embodiment, the sliding member 23 is provided with multiple locking grooves 231, which are arranged along the first direction. The locking member 27 is installed on the guide member 22. One end of the locking member 27 is rotatably provided on the guide member 22, and the other end of the locking member 27 is provided with a locking protrusion 271. When the drive handle 241 is in the locked position, the locking protrusion 271 extends into the locking groove 231 through the clearance hole of the guide member 22, so that the sliding member 23 is locked with the guide member 22. Thus, the lumbar support connecting assembly 30 is fixed on the housing 21 of the adjusting assembly 20 by the locking of the sliding member 23 and the guide member 22. When the drive handle 241 moves to the unlocked position, the locking protrusion 271 can be disengaged from the locking groove 231 and the clearance hole by rotating the locking member 27 around the axis extending along the first direction, so that the sliding member 23 can move along the first direction, and thus the lumbar support connecting assembly 30 can move flexibly in the first direction.

[0088] It is understandable that, due to differences in body shape and sitting habits among users, the required support position of the lumbar support 300 in the first direction will also be different. In this embodiment, multiple locking slots 231 are arranged at intervals along the first direction, so that users can adjust the position of the lumbar support 300 according to their personal habits and then lock it in the corresponding locking slot 231 through the locking member 27. This ensures that the adjusted position of the lumbar support 300 in the first direction remains unchanged, thereby allowing users to obtain a better sitting experience after adjustment. This allows the seat 1000 to better adapt to the usage needs of different users.

[0089] In some specific embodiments of this utility model, such as Figure 8 and Figure 9 As shown, the drive handle 241, transmission mechanism 25, and locking member 27 are located on the guide member 22 in a third direction (e.g., Figure 8 On the same side of the vertical direction shown, the guide member 22 is provided with a fixed post 221, and the transmission mechanism 25 may include: a transmission rod 252, a first connecting member 251 and a locking spring.

[0090] Specifically, the transmission rod 252 extends along the second direction, entering the receiving cavity 2101 from one side of the housing 21 and exiting from the other side of the housing 21. In the first direction, the transmission rod 252 is located between the drive rod 242 and the locking member 27. The first connecting member 251 and the drive handle 241 are located on the same side of the housing 21 in the second direction. The first connecting member 251 is connected to the drive handle 241 and the transmission rod 252. The drive handle 241 is rotatable relative to the first connecting member 251. The first connecting member 251 and the drive handle 241 are connected to the drive rod 252. 1. Limiting and cooperating in the second direction; the locking torsion spring 254 is sleeved on the fixed post 221 and extends along the third direction. In the first direction, the locking torsion spring 254 is located between the locking member 27 and the transmission rod 252. The two ends of the locking torsion spring 254 respectively form a first arm and a second arm extending along the first direction. The first arm is connected to the transmission rod 252, and the second arm is connected to the other end of the locking member 27. The locking torsion spring 254 is configured to drive the locking member 27 to rotate around the axis extending along the first direction. The third direction intersects the second direction and the first direction in pairs.

[0091] In this embodiment, the drive handle 241, the transmission mechanism 25, and the locking member 27 are arranged on the same side of the guide member 22 in the third direction. The arrangement is reasonable and facilitates the transmission connection between the drive handle 241, the transmission mechanism 25, and the locking member 27. The transmission mechanism 25 is provided with a transmission rod 252, which extends along the second direction and enters the receiving cavity 2101 from one side of the housing 21 and extends out from the other side of the housing 21. The transmission rod 252 is arranged between the drive rod 242 and the locking member 27. The transmission rod 252 and the drive rod 242 can be arranged in parallel.

[0092] A locking torsion spring 254 is disposed between the locking member 27 and the transmission rod 252. The locking torsion spring 254 is sleeved on the fixed post 221 and extends in a third direction. The first arm of the locking torsion spring 254 extends in the first direction and is connected to the transmission rod 252, and the second arm extends in the first direction and is connected to the other end of the locking member 27. That is, the first arm and the second arm are respectively located on both sides of the fixed post 221 in the first direction. When the locking torsion spring 254 rotates around the center line of the fixed post 221, the first arm and the second arm follow the rotation of the locking torsion spring 254 and move in the second direction. The displacement directions of the first arm and the second arm in the second direction are opposite. For example, when the first arm moves in the second direction toward the receiving cavity 2101... When the second arm moves toward the side wall of the drive handle 241, it moves toward the side wall of the receiving cavity 2101 away from the drive handle 241. During the movement of the second arm in the second direction, it can drive the locking member 27 with the locking protrusion 271 to rotate around the rotation axis of the other end, so that the locking member 27 can lock and engage with the locking groove 231 or disengage from the locking groove 231 to unlock the sliding member 23. For example, the end of the locking member 27 connected to the guide member 22 can be provided with a fixed shaft. The fixed shaft extends along the first direction and is fixed on the guide member 22. The end of the locking member 27 connected to the guide member 22 is provided with a mounting hole, and the fixed shaft passes through the mounting hole.

[0093] In this embodiment, the first connecting member 251 is connected to the drive handle 241 and the transmission rod 252 and is located on the same side of the housing 21 in the second direction as the drive handle 241. The structure is simple and the arrangement is reasonable. The first connecting member 251 and the drive handle 241 are limited in the second direction, so that the first connecting member 251 can move stably with the drive handle 241 in the second direction. When the drive handle 241 moves between the locked and unlocked positions in the second direction, the drive handle 241 can drive the transmission rod 252 to move in the second direction through the first connecting member 251, thereby driving the first arm to move in the second direction. This causes the second arm of the torsion spring to drive the locking member 27 to rotate around its fixed axis, thereby realizing the locking and unlocking of the sliding member 23. The torsion spring can well adapt to the movement of the transmission rod 252 in the first direction and the rotation of the locking member 27 around the rotation axis in the first direction. This allows the transmission rod and the locking member 27 to be stably and reliably connected through the torsion spring, so that the adjustment assembly 20 can stably and reliably perform locking and unlocking operations.

[0094] In this embodiment, the guide member 22 is provided with a fixed post 221, which has a simple structure and facilitates the installation and arrangement of the locking torsion spring 254. The drive handle 241 is rotatable relative to the first connecting member 251, and the first connecting member 251 and the drive handle 241 are limited and cooperated in the second direction, so that the drive handle 241 can rotate independently relative to the first connecting member 251 to adjust the support pressure and move in the second direction to drive the first connecting member 251 to perform the adjustment operation of the waist support 300 position, which well meets the usage needs of the drive handle 241.

[0095] In this embodiment, the third direction intersects with both the second and first directions. This is to illustrate that the third direction and the second direction can be arranged perpendicularly, or they can only intersect and not perpendicularly. The third direction and the first direction can be arranged perpendicularly, or they can only intersect and not perpendicularly. The second direction and the first direction can be arranged perpendicularly, or they can only intersect and not perpendicularly. The third direction is the vertical direction.

[0096] In one specific embodiment of this utility model, reference is made to Figure 6 As shown, the drive handle 241 may include a handheld part and a sleeve part, with the handheld part connected to the sleeve part. The sleeve part is fitted onto the drive rod 242, and the drive rod 242 and drive handle 241 are detachably connected. This makes it easier to assemble and disassemble the drive rod 242 and drive handle 241. The handheld part provides a good grip position for the user, allowing the user to hold the drive handle 241 more stably to perform operations such as rotating, pulling, or pushing the drive handle 241.

[0097] In one specific embodiment of this utility model, reference is made to Figure 6 and Figure 8 As shown, the transmission mechanism 25 may further include a fixed sleeve 253, which is disposed in the receiving cavity 2101. The fixed sleeve 253 is sleeved on and connected to the transmission rod 252. The fixed sleeve 253 is provided with a fixing part, and the first arm is fixedly connected to the fixing part. When the drive handle 241 is in the locked position, the fixed sleeve 253 abuts against the side wall of the receiving cavity 2101 in the second direction away from the drive handle 241. When the drive handle 241 is in the unlocked position, the fixed sleeve 253 abuts against the side wall of the receiving cavity 2101 in the second direction facing the drive handle 241.

[0098] In this embodiment, a fixing sleeve 253 is provided in the receiving cavity 2101. The fixing sleeve 253 is sleeved on the transmission rod 252 and connected to the transmission rod 252. For example, the fixing sleeve 253 can be detachably connected to the transmission rod 252. The fixing sleeve 253 and the transmission rod 252 are engaged in the upper limit of the transmission rod 252 in the second direction and the circumferential direction. The fixing sleeve 253 is fixedly connected to the first arm, which facilitates the assembly and connection of the fixing sleeve 253 and the locking torsion spring 254. When the drive handle 241 is in the locked position, the fixing sleeve 253 abuts against the side wall of the receiving cavity 2101 in the second direction away from the drive handle 241. When the drive handle 241 is in the unlocked position, the fixing sleeve 253 abuts against the side wall of the receiving cavity 2101 in the second direction facing the drive handle 241. Then the drive handle 241 can move away from the housing 21 in the second direction to move from the locked position to the unlocked position. The drive handle 241 can also move closer to the housing 21 in the second direction to move from the unlocked position to the locked position.

[0099] In this embodiment, a fixing sleeve 253 is provided on the transmission rod 252 and the fixing sleeve 253 is located in the receiving cavity 2101. The structure is simple. The fixing sleeve 253 can play a good role in limiting the movement of the drive handle 241 and the transmission rod 252 in the second direction, and can play a good role in positioning the movement of the drive handle 241 between the locked position and the unlocked position, so that the drive handle 241 can move stably to the locked position or the unlocked position, and the drive rod 242 and the transmission rod 252 can be stably inserted into the two side walls of the housing 21 in the second direction, preventing the drive rod 242 or the transmission rod 252 from detaching from the housing 21. The housing 21 can stably support the drive rod 242 and the transmission rod 252. At the same time, it can avoid the need to set separate parts on the drive rod 242 or the transmission rod 252 to limit and cooperate with the housing 21, thereby reducing the number of parts in the adjustment assembly 20 and reducing the production cost of the lumbar support adjustment device 100.

[0100] In one example of this utility model, reference is made to Figure 4 and Figure 10 As shown, the sliding member 23 is provided with a clearance channel 2301, which extends along the first direction and is open at both ends. One end of the adjusting member 26 extends into the clearance channel 2301 to abut against the lumbar support connecting assembly 30.

[0101] In this embodiment, the sliding member 23 is provided with a clearance channel 2301. The clearance channel 2301 extends along the first direction and is open at both ends. One end of the adjusting member 26 extends into the clearance channel 2301 to abut against the lumbar support connecting assembly 30. The structure is simple, making the overall structure of the sliding member 23 and the adjusting member 26 more compact, thereby making the overall structure of the lumbar support adjusting device 100 more compact. It also allows the sliding member 23 to cooperate with the guide member 22 in the circumferential direction of the adjusting member 26 to guide and support the lumbar support connecting assembly 30. This allows the force applied by the adjusting member 26 to the lumbar support connecting assembly 30 to be applied to the lumbar support connecting assembly 30 more stably and evenly, so that the sliding member 23 can slide more stably with the guide member 22.

[0102] The clearance passage 2301 is open at both ends along the first direction, which can meet the assembly and connection requirements of the adjustment component 26 and the lumbar support connection assembly 30.

[0103] In some specific embodiments of this utility model, reference is made to Figure 8 and Figure 10 As shown, the sliding member 23 is provided with a limiting hole 232, which is located on at least one side of the sliding member 23 in the second direction and extends along the first direction. The guide member 22 is provided with a through hole, the housing 21 is provided with a fixing hole, and the adjusting assembly 20 also includes a second limiting member, which is located in the fixing hole and passes through the through hole to limit and cooperate with the limiting hole 232.

[0104] In this embodiment, the sliding member 23 is provided with a limiting hole 232, which is located on at least one side of the sliding member 23 in the second direction. The limiting hole 232 extends along the first direction. The second limiting member is located in the fixing hole of the housing 21 and passes through the through hole of the guide member 22 to limit the movement of the sliding member 232. The structure is simple and can effectively limit the movement of the sliding member 23 in the first direction. This allows the sliding member 23 to be stably and reliably located in the sliding channel and slide in cooperation with the guide member 22 while meeting the position adjustment needs of the lumbar support 300 in the first direction. This prevents the sliding member 23 from completely disengaging from the sliding channel, thus improving the overall structural stability of the lumbar support adjustment device 100. As a result, the lumbar support adjustment device 100 can perform adjustment operations more stably and reliably when the seat 1000 is in use.

[0105] In some specific embodiments of this utility model, reference is made to Figure 4 , Figure 6 and Figure 9 As shown, the lumbar support connection assembly 30 may include a second connector 31, which is connected to the sliding member 23. The second connector 31 is provided with a guide rod, which extends into the clearance channel 2301 in a first direction. The adjusting member 26 is a spring, and the other end of the adjusting member 26 is sleeved on the guide rod.

[0106] In this embodiment, the lumbar support connecting assembly 30 includes a second connector 31, which is connected to the sliding member 23. Exemplarily, the second connector 31 and the sliding member 23 can be fastened together with fasteners to facilitate the assembly and disassembly of the lumbar support connecting assembly 30 and the adjusting assembly 20. The second connector 31 is provided with a guide rod that extends into the clearance channel 2301 along a first direction. The other end of the adjusting member 26 is fitted onto the guide rod. This simple structure makes the connection between the adjusting member 26 and the second connector 31 more stable and reliable. Furthermore, the guide rod can guide the deformation of the adjusting member 26 along the first direction, allowing the adjusting member 26 to deform stably along the first direction.

[0107] In one specific embodiment of this utility model, reference is made to Figure 4 , Figure 6 and Figure 9 As shown, the second connector 31 is provided with a receiving groove, which is open on the side opposite to the sliding member 23 in the first direction. The lumbar support connecting assembly 30 also includes a support member 32 and an elastic member 33.

[0108] Specifically, the support member 32 is adapted to be connected to the lumbar support 300. The support member 32 is provided with a mating groove. The second connecting member 31 extends into the mating groove in the first direction. In the third direction, one side of the mating groove is open. The end of the support member 32 with the open side in the third direction is rotatably connected to the second connecting member 31 through a rotating shaft that extends in the second direction. The elastic member 33 is provided in the receiving groove and can be elastically deformed in the first direction. The two ends of the elastic member 33 abut against the bottom wall of the receiving groove and the bottom wall of the mating groove, respectively. The elastic member 33 is configured to always apply an elastic force to the support member 32.

[0109] In this embodiment, the second connector 31 is provided with a receiving groove, which is open on the side of the first direction away from the sliding member 23. The support member 32 is provided with a mating groove. The second connector 31 extends into the mating groove along the first direction, so that the receiving groove and the mating groove can cooperate to define a closed cavity structure. The mating groove is open on the third direction side. The end of the support member 32 with the open side in the third direction is rotatably connected to the second connector 31 through a rotating shaft. The rotating shaft extends along the second direction. The support member 32 is open on the third direction side, which can play a role in avoiding the second connector 31 when the support member 32 rotates around the axis of the rotating shaft. This allows the support member 32 to move towards the second connector 31 in the first direction on the other side of the third direction. When the axis of the rotating shaft moves closer to or further away from the second connecting member 31, the second connecting member 31, which extends into the mating groove, can limit the rotation of the support member 32, so that the tilt angle of the support member 32 in the third direction can change within a certain angle range. An elastic member 33 is provided in the receiving groove. The elastic member 33 can elastically deform along the first direction. The two ends of the elastic member 33 abut against the second connecting member 31 and the support member 32 respectively, so that the rotation of the support member 32 can play a role in providing elastic support for the user's back. The user's back can be cushioned by the elastic member 33 when leaning against the lumbar support 300 or when detaching from the lumbar support 300, so as to provide flexible and stable support for the user's waist and make the user more comfortable when riding.

[0110] In some specific examples of this utility model, reference is made to Figure 4 As shown, a guide post can be provided in the mating groove of the support member 32, and the elastic member 33 is a spring and is sleeved on the guide post. This can guide the deformation of the elastic member 33 along the first direction, so that the elastic member 33 can deform stably along the first direction to buffer the impact when the user leans on it.

[0111] The following is for reference. Figures 1-11 Describes a seat 1000 according to a second aspect embodiment of the present invention.

[0112] like Figures 1-11 As shown, the seat 1000 according to an embodiment of the present utility model includes: a backrest 200 and a lumbar support 300, as well as a lumbar support adjustment device 100 according to a first aspect embodiment of the present utility model.

[0113] Other configurations and operations of the seat 1000 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0114] According to the embodiment of the present utility model, the seat 1000, by providing the lumbar support adjustment device 100 of the first aspect embodiment, and by providing the adjustment component 20, the adjustment component 20 is provided with an adjustment member 26 and a drive mechanism. One end of the adjustment member 26 is connected to the lumbar support connecting component 30, and the drive mechanism is configured to drive the other end of the adjustment member 26 to move along a first direction to change the compression amount of the adjustment member 26, so that the force exerted by the adjustment member 26 on the lumbar support connecting component 30 can be flexibly adjusted. This allows the user to flexibly adjust the support pressure of the lumbar support 300 on the back and waist as needed through the drive mechanism, thereby making the user more comfortable when sitting in the seat 1000 and improving the user experience. This allows the seat 1000 to well meet the usage needs of diverse user groups.

[0115] The following will refer to Figures 1-11 A seat 1000 according to a specific embodiment of the present invention is described.

[0116] like Figures 1-11 As shown, the seat 1000 includes a backrest 200, a lumbar support adjustment device 100 and a lumbar support 300. The backrest 200, the lumbar support adjustment device 100 and the lumbar support 300 are arranged sequentially in a first direction, which can be a front-back direction. The lumbar support adjustment device 100 extends obliquely along the first direction.

[0117] The lumbar support adjustment device 100 includes a backrest connector 10, an adjustment component 20, and a lumbar support connecting component 30. The backrest connector 10 is slidably connected to the backrest 200 in a third direction, and the lumbar support connecting component 30 is slidably connected to the lumbar support 300 in a third direction, which can be the up-down direction.

[0118] The adjustment assembly 20 includes a housing 21, a guide 22, a sliding member 23, a first limiting member 246, a second limiting member, an adjustment member 26, a drive mechanism, a transmission mechanism 25, a locking member 27, and a mounting base 28. The housing 21 may include a main housing 211 and a cover 212. The cover 212 is U-shaped and opens towards the main housing 211 in a third direction. The cover 212 covers the main housing 211 and is fastened to the main housing 211 by fasteners. The main housing 211 has fixing holes on both sides in a second direction, which may be left or right. The cover 212 cooperates with the main housing 211 to define a receiving cavity 2101. The receiving cavity 2101 is open at both ends in the first direction. One end of the main housing 211 in the first direction is fastened to the backrest connector 10.

[0119] The guide member 22 is assembled into the receiving cavity 2101 from the other end of the main housing 211 and is fastened to the main housing 211. A fixing post 221 is provided on one side of the guide member 22 in the third direction. The mounting base 28 is provided on the guide member 22 and is located on the same side of the guide member 22 in the third direction as the fixing post 221. The guide member 22 is provided with a sliding channel that extends along the first direction and is open at both ends. The sliding channel communicates with the receiving cavity 2101. The guide member 22 is provided with through holes aligned with the fixing holes on both sides in the second direction. The guide member 22 is provided with a clearance hole on the side of the guide member 22 facing the mounting base 28 in the third direction. The clearance hole communicates with the sliding channel. The locking member 27 is installed on the mounting base 28 and extends along the second direction. One end of the locking member 27 is rotatably connected to the mounting base 28. The rotation axis of the locking member 27 extends along the first direction. The other end of the locking member 27 is provided with a locking protrusion 271.

[0120] The sliding member 23 is disposed in the sliding channel and extends along the first direction. The sliding member 23 slides and engages with the sliding channel. The sliding member 23 has a clearance channel 2301, which extends along the first direction and is open at both ends. The clearance channel 2301 communicates with the receiving cavity 2101. The sliding member 23 is provided with limiting holes 232 on both sides in the second direction. The limiting holes 232 extend along the first direction in a long strip shape. The limiting holes 232 are aligned with the through hole and the fixing hole in the second direction. The second limiting member is fixed in the fixing hole and extends through the through hole into the limiting hole 232 and engages with the limiting hole 232. The sliding member 23 is provided with a locking groove 231 on the side of the third direction facing the locking member 27. The locking groove 231 communicates with the clearance channel 2301. There are four locking grooves 231, which are arranged at intervals along the first direction. The locking protrusion 271 of the locking member 27 passes through the clearance hole of the guide member 22 along the third direction and extends into one of the locking grooves 231.

[0121] The drive mechanism includes a drive handle 241, a drive rod 242, a worm gear 243, a fixed rod 245, a transmission component 244, a first limiting component 246, and a nut 247. The fixed rod 245 is a screw and extends along a first direction. The fixed rod 245 is located in the receiving cavity 2101 and connected to the backrest connector 10. The transmission component 244 is a worm gear structure and is sleeved on the fixed rod 245. The nut 247 is installed on the transmission component 244. The transmission component 244 is threadedly engaged with the fixed rod 245 through the nut 247. The first limiting component 246 is located at the other end of the fixed rod 245 and is fastened to the fixed rod 245. The first limiting component 246 and the transmission component 244 are engaged in a limiting cooperation in the first direction.

[0122] The adjusting member 26 is a spring. The adjusting member 26 extends along the first direction. One end of the adjusting member 26 is connected to the transmission member 244 and the other end extends into the clearance channel 2301. The worm gear 243 is located on the upper side of the transmission member 244 in the third direction. The worm gear 243 and the locking member 27 are both located on the same side of the adjusting member 26 in the third direction. The worm gear 243 extends along the second direction and is located in the receiving cavity 2101 and is spaced apart from the sliding member 23 in the first direction. The worm gear 243 meshes with the transmission member 244 for transmission.

[0123] The drive handle 241 is arranged on the outer side of the housing 21 in the second direction. The drive handle 241 is fastened to the drive rod 242. The drive rod 242 passes through the housing 21 in the second direction. The cross-section of the drive rod 242 is a regular hexagon. The central hole of the worm gear 243 matches the drive rod 242. The drive rod 242 passes through the central hole of the worm gear 243 to support and fix the worm gear 243.

[0124] The transmission mechanism 25 includes a first connecting member 251, a transmission rod 252, a fixed sleeve 253, and a locking torsion spring 254. The transmission rod 252 extends along the second direction and passes through the housing 21. The transmission rod 252 is arranged between the drive rod 242 and the fixed post 221. The fixed sleeve 253 is sleeved on the transmission rod 252 and is located in the receiving cavity 2101. The first connecting member 251 is a connecting plate. The first connecting member 251 and the drive handle 241 are located on the same side of the housing 21 in the second direction. The first connecting member 251 is connected to the drive handle 241 and the transmission rod 252. The drive handle 241 is rotatable relative to the first connecting member 251. The drive handle 241 is movable relative to the worm gear 243 along the second direction. The drive handle 241 and the first connecting member 251 are limited and engaged in the second direction. A locking torsion spring 254 is sleeved on a fixed post 221. The first arm of the locking torsion spring 254 is connected to a fixed sleeve 253, and the second arm of the locking torsion spring 254 is connected to the end of the locking member 27 that is rotatably connected to the mounting base 28. The main housing 211 has grooves recessed toward the receiving cavity 2101 on both sides in the second direction. The first connecting member is located in the groove. The ends of the drive rod 242 and the transmission rod 252 that protrude from the other side of the main housing 211 are arranged in the groove. The cover 212 can cover the two grooves, and an opening for the drive rod 242 to pass through can be provided on the cover 212.

[0125] The lumbar support connection assembly 30 includes a second connector 31, a support 32, and an elastic member 33. The second connector 31 is fastened to the sliding member 23, the adjusting member 26 abuts against the second connector 31, the support 32 is rotatably connected to the second connector 31 via a pivot, and the elastic member 33 is disposed in the cavity formed by the cooperation of the second connector 31 and the support 32. The elastic member 33 is a spring, and its two ends along the first direction abut against the second connector 31 and the support 32 respectively. The support 32 and the lumbar support 300 slide in the third direction, so that the lumbar support 300 can be adjusted in the third direction.

[0126] Before use, the drive handle 241 of the seat 1000 in this embodiment is in the locked position, and the locking member 27 locks the sliding member 23, so that the lumbar support 300 is kept in a stable position in the first direction. Before sitting in the seat 1000, the user can quickly adjust the position of the lumbar support 300 by sliding the lumbar support adjustment device 100 along the backrest 200 in the third direction. The user can further adjust the position of the lumbar support 300 by sliding the lumbar support 300 relative to the lumbar support adjustment device 100. When a user needs to adjust the lumbar support 300 in the first direction after sitting in the seat 1000, the user can pull the drive handle 241 in the second direction to move the drive handle 241 from the locked position to the unlocked position. The locking member 27 releases the sliding member 23. The user can then push the lumbar support 300 in the first direction as needed. After the position is adjusted, the user can push the drive handle 241 in the second direction to move the drive handle 241 from the unlocked position to the locked position. The locking member 27 locks the sliding member 23, the guide member 22, and the main housing 211, so that the lumbar support 300 maintains the adjusted position in the first direction.

[0127] When a user needs to adjust the support pressure of the lumbar support 300 on their lower back, the user pulls the drive handle 241 in the second direction. The slider 23 unlocks from the guide 22, and the force applied by the adjusting member 26 is transmitted to the user's lower back through the lumbar support connecting assembly 30. The user can then feel the change in support pressure. By rotating the drive handle 241, the user changes the compression of the adjusting member 26, thereby adjusting the force exerted by the adjusting member 26 on the lumbar support connecting assembly 30. This allows the user to flexibly adjust the support pressure according to their perception until it meets their individual needs. The precise adjustment can satisfy the personalized support requirements of different users. After adjustment, the drive handle 241 remains in the unlocked position, allowing the lumbar support 300 to provide the required support pressure. When a user feels tired or needs to get off the seat 1000, the user can push the drive handle 241 in the second direction to lock the lumbar support 300 in the first direction position, so that the lumbar support 300 provides natural support to the user. After the user gets off the seat 1000, the lumbar support 300 can remain in the first direction position, so that the user does not need to adjust the position of the lumbar support 300 again when sitting down again.

[0128] This embodiment uses an adjustment component 20, which includes an adjustment member 26 and a drive mechanism. One end of the adjustment member 26 is connected to the lumbar support connecting component 30. The drive mechanism is configured to drive the other end of the adjustment member 26 to move along a first direction to change the compression amount of the adjustment member 26. This allows the force exerted by the adjustment member 26 on the lumbar support connecting component 30 to be flexibly adjusted. As a result, the user can flexibly adjust the support pressure of the lumbar support 300 on the back and waist as needed through the drive mechanism. This makes the user more comfortable and provides a better user experience when sitting in the seat 1000, enabling the seat 1000 to better meet the needs of diverse user groups.

[0129] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0130] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0131] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0133] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lumbar support adjustment device, characterized by, For use in a seat, the seat includes a backrest (200) and a lumbar support (300) arranged in a first direction, the lumbar support adjustment device including: Backrest connector (10), the backrest connector (10) being adapted to be connected to the backrest (200); A lumbar support connecting assembly (30) adapted to be connected to the lumbar support (300); An adjustment assembly (20), wherein the adjustment assembly (20) is disposed between the backrest connector (10) and the lumbar support connector (30), comprises: Adjustment member (26), the adjustment member (26) is elastically deformable along a first direction, and one end of the adjustment member (26) is connected to the lumbar support connecting assembly (30); A drive mechanism configured to drive the other end of the adjuster (26) to move along the first direction to change the compression of the adjuster (26).

2. The lumbar support adjustment device of claim 1, wherein, The drive mechanism includes: A fixing rod (245) extends along the first direction and is fixedly connected to the backrest connector (10); A transmission member (244) is sleeved on the fixed rod (245), and the other end of the adjusting member (26) abuts against the transmission member (244). The transmission member (244) is configured to be threadedly engaged with the fixed rod (245) to move along the first direction.

3. The lumbar support adjustment device of claim 2, wherein, The transmission component (244) has a mounting groove on its radial inner side, which is open on one side in the first direction. The drive mechanism also includes a nut (247), which is located in the mounting groove and is threadedly connected to the fixing rod (245).

4. The lumbar support adjustment device of claim 3, wherein, The driving mechanism further includes a first limiting member (246), which is connected to the fixed rod (245). The first limiting member (246) is located at one end of the orientation adjustment member (26) of the fixed rod (245), and the first limiting member (246) is used to limit the relative movement of the fixed rod (245) and the transmission member (244) in the first direction.

5. Lumbar support adjustment device according to any of claims 2-4, characterized in that, The adjustment assembly (20) further includes a housing (21), which is connected to the backrest connector (10). The housing (21) has a receiving cavity (2101) that is open at both ends in the first direction. The adjustment member (26), the fixing rod (245), and the transmission member (244) are all disposed within the receiving cavity (2101). The drive mechanism further includes: A drive handle (241) and a drive rod (242) are provided. The drive handle (241) is located on one side of the housing (21) in the second direction. The drive rod (242) extends along the second direction and is connected to the drive handle (241). The drive rod (242) is rotatably inserted through the housing (21). A worm gear (243) is disposed in the receiving cavity (2101). The worm gear (243) has a central hole. The drive rod (242) passes through the central hole. The drive rod (242) and the worm gear (243) are in a circumferential upper limit engagement with the worm gear (243). The worm gear (243) meshes and drives the transmission member (244). The second direction is perpendicular to the first direction.

6. The lumbar support adjustment device of claim 5, wherein, The cross-section of the drive rod (242) is polygonal.

7. The lumbar support adjustment device of claim 5, wherein, The transmission component (244) includes: A worm segment extending along the first direction, the worm segment meshing with the worm wheel (243) for transmission; A connecting segment is connected to the worm segment and located on the side of the worm segment facing the adjusting member (26). The adjusting member (26) is a spring, and the other end of the adjusting member (26) is sleeved on the connecting segment.

8. The lumbar support adjustment device of claim 5, wherein, The adjustment component (20) further includes: A guide member (22) is disposed in the receiving cavity (2101) and connected to the housing (21). The guide member (22) is provided with a guide channel extending along the first direction, and the two ends of the guide channel are open. A sliding member (23) is slidably disposed in the guide channel along the first direction, and the sliding member (23) is connected to the waist support connecting assembly (30); The transmission mechanism (25) and the locking element (27) are connected via the transmission mechanism (25), wherein the drive handle (241) and the locking element (27) are connected via the transmission mechanism (25). In the second direction, the drive rod (242) passes through the receiving cavity (2101) from one side of the housing (21) and exits from the other side of the housing (21). The drive handle (241) is movable between a locked position and an unlocked position. In the locked position, the locking member (27) locks the sliding member (23). In the unlocked position, the locking member (27) moves away from the sliding member (23).

9. The lumbar support adjustment device according to claim 8, characterized in that, The sliding member (23) includes a plurality of locking grooves (231) arranged at intervals along the first direction. The locking member (27) extends along the second direction. One end of the locking member (27) is rotatably disposed on the guide member (22) about an axis extending along the first direction. The other end of the locking member (27) is provided with a locking protrusion (271). The guide member (22) is provided with a clearance hole that communicates with the guide channel. When the drive handle (241) is in the locked position, the locking protrusion (271) extends into the locking groove (231). When the drive handle (241) is in the unlocked position, the locking protrusion (271) moves away from the locking groove (231).

10. The lumbar support adjustment device of claim 9, wherein, The drive handle (241), the transmission mechanism (25), and the locking member (27) are located on the same side of the guide member (22) in a third direction. The guide member (22) is provided with a fixing post (221). The transmission mechanism (25) includes: A transmission rod (252) extends along the second direction, the transmission rod (252) extends into the receiving cavity (2101) from one side of the housing (21) and exits from the other side of the housing (21), and in the first direction, the transmission rod (252) is disposed between the drive rod (242) and the locking member (27); A first connector (251) is provided on the same side of the housing (21) in the second direction as the drive handle (241). The first connector (251) is connected to the drive handle (241) and the transmission rod (252). The drive handle (241) is rotatable relative to the first connector (251). The first connector (251) and the drive handle (241) are in a limiting engagement in the second direction. A locking torsion spring (254) is sleeved on the fixed post (221) and extends along the third direction. In the first direction, the locking torsion spring (254) is located between the locking member (27) and the transmission rod (252). The two ends of the locking torsion spring (254) are respectively formed with a first arm and a second arm extending along the first direction. The first arm is connected to the transmission rod (252), and the second arm is connected to the other end of the locking member (27). The locking torsion spring (254) is configured to drive the locking member (27) to rotate about the axis extending along the first direction. The third direction intersects the second direction and the first direction in pairs.

11. The lumbar support adjustment device of claim 10, wherein, The transmission mechanism (25) further includes a fixing sleeve (253), which is disposed in the receiving cavity (2101). The fixing sleeve (253) is sleeved on the transmission rod (252) and connected to the transmission rod (252). The fixing sleeve (253) is provided with a fixing part. The first arm is fixedly connected to the fixing part. When the drive handle (241) is in the locked position, the fixing sleeve (253) abuts against the side wall of the receiving cavity (2101) in the second direction away from the drive handle (241). When the drive handle (241) is in the unlocked position, the fixing sleeve (253) abuts against the side wall of the receiving cavity (2101) in the second direction facing the drive handle (241).

12. The lumbar support adjustment device of claim 8, wherein, The sliding member (23) is provided with a clearance channel (2301), which extends along the first direction and is open at both ends. One end of the adjusting member (26) extends into the clearance channel (2301) to abut against the lumbar support connecting assembly (30).

13. The lumbar support adjustment device of claim 12, wherein, The sliding member (23) is provided with a limiting hole (232), the limiting hole (232) is provided on at least one side of the sliding member (23) in the second direction, the limiting hole (232) extends along the first direction, the guide member (22) is provided with a through hole, the housing (21) is provided with a fixing hole, and the adjusting assembly (20) further includes a second limiting member, the second limiting member is provided in the fixing hole and passes through the through hole and is limited and engaged with the limiting hole (232).

14. The lumbar support adjustment device of claim 12, wherein, The lumbar support connecting assembly (30) includes a second connector (31), which is connected to the sliding member (23). The second connector (31) is provided with a guide rod, which extends into the clearance channel (2301) along the first direction. The adjusting member (26) is a spring, and the other end of the adjusting member (26) is sleeved on the guide rod.

15. The lumbar support adjustment device of claim 14, wherein, The second connector (31) is provided with a receiving groove, which is open on the side opposite to the sliding member (23) in the first direction. The lumbar support connecting assembly (30) further includes: A support member (32) is adapted to be connected to the lumbar support (300). The support member (32) is provided with a mating groove. The second connecting member (31) extends into the mating groove along the first direction. In the third direction, one side of the mating groove is open. The end of the support member (32) with the open side in the third direction is rotatably connected to the second connecting member (31) via a pivot shaft that extends along the second direction. An elastic element (33) is disposed in the receiving groove and is elastically deformable along the first direction. The two ends of the elastic element (33) abut against the bottom wall of the receiving groove and the bottom wall of the mating groove, respectively. The elastic element (33) is configured to always apply an elastic force to the support (32).

16. A seat, characterized by include: Backrest (200) and lumbar support (300); The lumbar support adjustment device according to any one of claims 1-15, wherein the lumbar support (300) is mounted on the backrest (200) via the lumbar support adjustment device.

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