Waist rest multidirectional adjusting mechanism

Abstract

The utility model discloses a waist rest multidirectional adjusting mechanism which comprises a back support and a waist rest body, a height adjusting assembly is arranged between the back support and the waist rest body, the height adjusting assembly comprises a telescopic assembly and a sliding groove, and the telescopic assembly is arranged at one of the front end of the back support and the rear end of the waist rest body; the sliding groove is formed in the other one of the front end of the back support and the rear end of the waist rest body in the vertical direction. The telescopic assembly can slide up and down along the sliding groove. The telescopic assembly comprises a sliding part and a connecting base, one end of the connecting base is sunken in the front-back direction to form a sleeving groove, and the sliding part is slidably connected to the connecting base through the sleeving groove; the positioning assembly comprises a gear piece and an elastic piece, the gear piece is arranged at one of the bottom of the sliding groove and the telescopic assembly, and the elastic piece is arranged at the gear piece and the other one of the bottom of the sliding groove and the telescopic assembly; a plurality of tooth grooves are formed in one side of the gear part; the elastic piece is an elastic rod piece, the upper end of the elastic piece is fixed to the bottom of the sliding groove or the telescopic assembly, and the lower end of the elastic piece is bent to form a clamping head.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, specifically to a multi-directional lumbar support adjustment mechanism. Background Technology

[0002] A lumbar support is a common component in chairs. It protrudes forward relative to the backrest to conform to the natural forward curvature of the lumbar spine. When users sit for long periods at work or studying, a lumbar support provides effective support for the lower back, relieving fatigue, preventing scoliosis, and protecting lumbar health. However, the position of the lower back relative to the backrest often varies for users of different ages and body types. This means that a fixed-position lumbar support may not be suitable for everyone, resulting in limited practicality.

[0003] To address the aforementioned issues, the applicant's previously filed patent provides a lumbar support height adjustment device (application number: CN202323544971.6). This device utilizes a sliding member and a sliding groove that slide together between the lumbar support body and the back support frame, allowing the lumbar support body to slide up and down relative to the back support frame. The sliding member has a gear slot with multiple teeth on one side. The back support frame has a first elastic member, one end of which is connected to a locking member. The locking member has a locking head that engages with the teeth. Under the elastic force of the first elastic member, the locking head sequentially engages with the multiple teeth to achieve gear adjustment of the lumbar support body and to enable the gear adjustment mechanism to adjust the lumbar support body's position on the back support frame.

[0004] Furthermore, the applicant's previous patent application also provided an elastic lumbar support mechanism (application number: CN202323654619.8), which forms a triangular linkage mechanism by hinged lumbar support body, length adjustment component, and back support to each other, giving the elastic lumbar support mechanism good support strength; when the lower end of the lumbar support body is pulled forward, it drives the length adjustment component to rotate synchronously and adjust the length of the length adjustment component, thereby adjusting the depth of the lumbar support; and by utilizing the gap between the length adjustment component and the back support to form a movable space, when the lumbar support body is subjected to a support force, the lumbar support body and the length adjustment component swing backward and at least one of them undergoes elastic deformation, thereby providing elastic support for the user.

[0005] In the spirit of striving for excellence, the inventors have found the following problems that need to be optimized in the above two solutions: Although the lumbar supports of the two solutions can be moved to adapt to different users, the lumbar support of one solution can only rotate back and forth to adjust the depth, and the lumbar support of the other solution can only slide up and down to adjust the height. It is not possible to adjust both the height and depth of the lumbar support, and the degree of adjustment is relatively limited.

[0006] Therefore, how to make the lumbar support not only adjustable in height but also adjustable in depth has become the main problem that needs to be solved. Summary of the Invention

[0007] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a multi-directional adjustment mechanism for the lumbar support. By using a telescopic component and a sliding groove that slide and cooperate with each other in the vertical direction, not only can the height of the lumbar support body be adjusted by sliding up and down relative to the back support, but the sliding part and the connecting seat in the telescopic component can also slide relative to each other in the front and back direction, thereby driving the lumbar support body to slide back and forth relative to the back support to adjust its depth. Thus, the lumbar support body can be adjusted in both the vertical and front and back directions relative to the back support, thereby greatly improving the degree of freedom of adjustment of the lumbar support body and having good practicality.

[0008] The effect of this utility model is achieved as follows:

[0009] This application provides a multi-directional lumbar support adjustment mechanism, including a back support and a lumbar support body located at the front of the back support. A height adjustment component is provided between the back support and the lumbar support body. The height adjustment component includes a telescopic component and a sliding groove. The telescopic component is located at one of the front end of the back support and the rear end of the lumbar support body, and the sliding groove is vertically opened at the other of the front end of the back support and the rear end of the lumbar support body. The telescopic component can slide up and down along the sliding groove, and the telescopic component can be fixed to the sliding groove at any height position by a positioning component, thereby driving the lumbar support body to slide up and down relative to the back support to adjust the height. The telescopic component includes a sliding part and a connecting seat that are spliced ​​together. One end of the connecting seat is recessed in the front-back direction to form a socket groove. The sliding part is slidably connected to the connecting seat through the socket groove. When the sliding part slides back and forth relative to the connecting seat, the overall length of the telescopic component extends or shortens, thereby driving the lumbar support body to move back and forth relative to the back support to adjust the distance.

[0010] The positioning component includes a stop and an elastic element. The stop is located in one of the slide groove bottom and the telescopic component, and the elastic element is located in the other of the slide groove bottom and the telescopic component. The stop has multiple toothed grooves on one side. The elastic element is provided with a locking head that engages with the toothed grooves. The elastic element always applies a spring force to the locking head, causing it to engage in the direction of the toothed grooves. When the telescopic component slides up and down along the slide groove, the locking head engages with multiple toothed grooves in sequence under the spring force of the elastic element.

[0011] The elastic element is a rod with elasticity. The upper end of the elastic element is fixed to the bottom of the slide groove or the telescopic component, and the lower end of the elastic element is bent to form a clamp. When the elastic element is affected by external force, the lower part of the elastic element will undergo elastic deformation, which will cause the clamp to swing left and right.

[0012] Furthermore, the back support includes a sliding support extending in a vertical direction. The front end of the sliding support is recessed to form a groove. One of the sliding part and the connecting seat is located at the rear end of the lumbar support body, and the other of the sliding part and the connecting seat is slidably connected to the groove, making the processing and manufacturing operation of the groove simpler.

[0013] Furthermore, the telescopic assembly also includes a stepless adjustment component. This component comprises a threaded adjustment rod with external threads, and an internally threaded hole extending in the front-to-back direction on the sliding part. The threaded adjustment rod is positioned within a sleeve groove. One end of the threaded adjustment rod is rotatably connected to the connecting seat and can rotate circumferentially. The other end of the threaded adjustment rod is threaded to the sliding part through the internally threaded hole. This allows the sliding part to slide back and forth relative to the connecting seat as the threaded adjustment rod rotates. Simply rotating the threaded adjustment rod is sufficient to move the sliding part back and forth, making adjustment easy. Moreover, the sliding part can be fixed in any sliding position, providing a high degree of freedom in adjustment.

[0014] Furthermore, the bottom of the sliding groove is hollowed out with a clearance groove extending vertically. The front end of the sliding part is connected to the rear end of the lumbar support body. The rear end of the threaded adjustment rod passes through the connecting seat and the clearance groove. The stepless adjustment component also includes a knob, which is connected to the end of the threaded adjustment rod that passes through the clearance groove. The knob is configured to drive the threaded adjustment rod to rotate. By setting a knob, it is easy for the user to rotate and adjust the threaded adjustment rod, thereby making the depth adjustment operation of the lumbar support body simpler.

[0015] Furthermore, a gear shift groove is recessed on the bottom of the slide groove, and a gear shift component is disposed in the gear shift groove. An annular gap is formed between the gear shift component and the groove wall. The gap between the toothed side of the gear shift component and the groove wall is the gear shift channel, and the gap between the toothed side of the gear shift component and the groove wall is the reset channel. When the telescopic component slides upward along the slide groove, the locking head moves within the gear shift channel; when the telescopic component slides downward along the slide groove, the locking head moves within the reset channel. By setting the gear shift groove, when the locking head switches between adjacent toothed grooves, it slides out of the toothed groove and moves within the gear shift channel, making it less prone to deviation and making the gear adjustment process more stable. Simultaneously, when the lumbar support body is adjusted to the highest position, the locking head can be easily returned to the lowest position via the reset channel, making the gear reset operation more convenient.

[0016] Furthermore, the toothed groove is angled downwards from the side closest to the gear position groove to the side closest to the reset groove. This allows the locking head to be stably engaged at the bottom of the toothed groove when the user leans against the backrest, providing good stability. Moreover, during gear shifting, simply pulling the backrest upwards allows the locking head to slide out along the inclined surface of the toothed groove, making gear adjustment easier and smoother.

[0017] Furthermore, the elastic element is detachably connected to the connecting seat. The upper end of the elastic element is bent forward to form a plug-in portion. The connecting seat has plug-in holes cut out along its front and back sides. The plug-in portion and the plug-in holes are plugged in and fitted together. Installing the elastic element by plugging in and fitting together makes the installation and disassembly of the elastic element relatively simple.

[0018] Furthermore, the rear end of the connector also has a protruding positioning part, which has a recessed positioning groove extending vertically. When the insertion part is inserted into the insertion hole, the upper part of the elastic element is engaged in the positioning groove. The positioning part is configured as a connecting screw, and the nut of the screw fixes the upper part of the elastic element to the positioning groove. This ensures that the elastic element and the connector remain relatively fixed in the horizontal direction, with good connection strength, and that installation and disassembly are relatively simple.

[0019] The multi-directional lumbar support adjustment mechanism provided in this application, through a telescopic component and a sliding groove that slide and cooperate with each other in the vertical direction, not only allows the lumbar support body to slide up and down relative to the back support to adjust its height, but also allows the sliding part and connecting seat within the telescopic component to slide relative to each other in the front-back direction, thereby driving the lumbar support body to slide back and forth relative to the back support to adjust its depth. Thus, the lumbar support body can be adjusted in both the vertical and front-back directions relative to the back support, significantly improving the degree of freedom of adjustment and offering good practicality. Furthermore, the connecting seat has a sleeve-like structure, fitting onto the sliding part, making the front-back sliding process of the sliding part more stable and smooth, and improving the overall stability of the telescopic component. Moreover, the adjustment operations in both the vertical and front-back directions are completed using the telescopic component, making the overall structure of the multi-directional lumbar support adjustment mechanism relatively simple and the adjustment operation convenient. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 A three-dimensional structural schematic diagram of the multi-directional adjustment mechanism for the lumbar support provided in the embodiments of this application;

[0022] Figure 2 A schematic diagram of the rear structure of the multi-directional lumbar support adjustment mechanism provided in the embodiments of this application;

[0023] Figure 3 A cross-sectional structural schematic diagram of the multi-directional adjustment mechanism of the lumbar support body when it is adjusted to the lowest position according to the embodiment of this application;

[0024] Figure 4 A cross-sectional structural schematic diagram of the multi-directional adjustment mechanism of the lumbar support body when it is adjusted to the highest position according to the embodiment of this application;

[0025] Figure 5A cross-sectional structural schematic diagram of the multi-directional adjustment mechanism of the lumbar support body when it is adjusted to the foremost position according to the embodiment of this application;

[0026] Figure 6 A three-dimensional structural diagram of the back support provided in an embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the connection structure between the lumbar support body and the back support frame provided in the embodiments of this application;

[0028] Figure 8 A schematic diagram illustrating the positional change between the elastic element and the stop element when the lumbar support body provided in this embodiment is adjusted to the highest position;

[0029] Figure 9 A schematic diagram showing the positional change between the elastic element and the stop element when the lumbar support body provided in this embodiment of the application is reset;

[0030] Figure 10 A schematic diagram illustrating the positional changes between the elastic element and the stop element when the lumbar support body is fixed according to an embodiment of this application;

[0031] Figure 11 A schematic diagram illustrating the positional changes between the elastic element and the gear shifting element when the lumbar support body provided in this embodiment of the application performs a gear shifting operation;

[0032] Figure 12 A schematic diagram of the connection structure between the telescopic component and the lumbar support body provided in an embodiment of this application;

[0033] Figure 13 This is a schematic diagram of the connection structure between the elastic element and the connecting seat provided in an embodiment of this application.

[0034] The reference numerals in the attached drawings are as follows: 1-Back support, 101-Slide groove, 102-Allowing groove, 110-Sliding support part, 120-Grip part, 121-Gear groove, 130-Grip groove, 131-Grip channel, 132-Reset channel, 2-Lumbar support body, 3-Telescopic assembly, 310-Sliding part, 311-Internal threaded hole, 312-Lumbar support connecting part, 320-Connecting seat, 321-Socket groove, 322-Insertion hole, 323-Positioning part, 324-Positioning groove, 325-Through hole, 330-Threaded adjusting rod, 331-Threaded part, 332-Limiting part, 333-Knob connecting part, 340-Knob, 350-Elastic element, 351-Clip head, 352-Insertion part. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0036] Please refer to the attached document. Figure 1-13 This application provides a multi-directional lumbar support adjustment mechanism, including a back support 1 and a lumbar support body 2 located in front of the back support 1. A height adjustment component is provided between the back support 1 and the lumbar support body 2. The height adjustment component includes a telescopic component 3 and a sliding groove 101. The telescopic component 3 is located at one of the front end of the back support 1 and the rear end of the lumbar support body 2, and the sliding groove 101 is vertically opened at the other of the front end of the back support 1 and the rear end of the lumbar support body 2. The telescopic component 3 can slide up and down along the sliding groove 101, and the telescopic component 3 can be positioned in any direction by a positioning component. The height of the lumbar support body 2 is fixed in the sliding groove 101, thereby allowing the lumbar support body 2 to slide up and down relative to the back support 1 to adjust its height. The telescopic component 3 includes a sliding part 310 and a connecting seat 320 that are spliced ​​together. One end of the connecting seat 320 is recessed along the front and back direction to form a sleeve groove 321. The sliding part 310 is slidably connected to the connecting seat 320 through the sleeve groove 321. When the sliding part 310 slides back and forth relative to the connecting seat 320, the overall length of the telescopic component 3 is extended or shortened, thereby allowing the lumbar support body 2 to move back and forth relative to the back support 1 to adjust the distance.

[0037] In this embodiment, the telescopic component 3 and the sliding groove 101, which slide and cooperate with each other in the vertical direction, not only can the lumbar support body 2 slide up and down relative to the back support 1 to adjust its height, but the sliding part 310 and the connecting seat 320 within the telescopic component 3 can also slide relative to each other in the front-back direction, thereby driving the lumbar support body 2 to slide back and forth relative to the back support 1 to adjust its depth. Thus, the lumbar support body 2 can be adjusted in both the vertical and front-back directions relative to the back support 1, significantly improving the degree of freedom of adjustment and enhancing its practicality. Furthermore, the connecting seat 320 has a sleeve-like structure, which fits onto the sliding part 310, making the front-back sliding process of the sliding part 310 more stable and smooth, and improving the overall stability of the telescopic component 3. Moreover, the adjustment operations in both the vertical and front-back directions are completed using the telescopic component 2, making the overall structure of the multi-directional adjustment mechanism for the lumbar support relatively simple and the adjustment operation convenient.

[0038] Please refer to the attached document. Figure 6 In some embodiments of this application, the back support 1 includes a sliding support portion 110 extending in a vertical direction. The front end of the sliding support portion 110 is recessed to form a groove 101. One of the sliding portion 310 and the connecting seat 320 is disposed at the rear end of the lumbar support body 2, and the other of the sliding portion 310 and the connecting seat 320 is slidably connected to the groove 101.

[0039] In this embodiment, the back support 1 is an integrally formed frame structure. Compared with the smaller lumbar support body 2, it is not only easier to process the slide groove 101 and positioning components, but also allows for the processing of a longer slide groove 101, meaning that the lumbar support body 2 has a longer adjustment distance in the vertical direction.

[0040] The sliding support 110 is located in the empty space in the middle of the back support 1, which effectively utilizes the space of the back support 1 and makes the overall structure of the multi-directional adjustment mechanism of the lumbar support more compact.

[0041] Of course, in other embodiments of this application, the slide 101 may also be provided at the rear end of the lumbar support body 2, and the telescopic component 3 may be provided at the front end of the back support 1.

[0042] Please refer to the attached document. Figure 3-5 In some embodiments of this application, the telescopic assembly 3 is further provided with a stepless adjustment assembly. The stepless adjustment assembly includes a threaded adjustment rod 330 with external threads, and an internal threaded hole 311 extending in the front-back direction is provided on the sliding part 310. The threaded adjustment rod 330 is disposed in the sleeve groove 321. One end of the threaded adjustment rod 330 is rotatably connected to the connecting seat 320 and can rotate in its own circumference. The other end of the threaded adjustment rod 330 is threadedly connected to the sliding part 310 through the internal threaded hole 311, so that when the threaded adjustment rod 330 rotates, the sliding part 310 is driven to slide back and forth relative to the connecting seat 320.

[0043] In this embodiment, by threading the threaded adjusting rod 330 and the sliding part 310 together, a structure similar to a lead screw and nut is formed between them. Simply rotating the threaded adjusting rod 330 will drive the sliding part 310 to slide back and forth, making the adjustment operation simple. Furthermore, the threaded adjusting rod 330 can stop rotating at any position, meaning that the sliding part 310 can be fixed at any sliding position. This is a stepless adjustment with a high degree of freedom.

[0044] Both the sliding part 310 and the connecting seat 320 have irregular shapes, which makes them relatively fixed in the circumferential direction. This prevents the sliding part 310 from rotating when the threaded adjusting rod 330 rotates, forcing it to slide back and forth along the direction of the thread. Preferably, both the sliding part 310 and the connecting seat 320 have square cross-sectional shapes. However, in other embodiments of this application, the cross-sectional shapes of the sliding part 310 and the connecting seat 320 can also be triangular, pentagonal, elliptical, etc.

[0045] Of course, in other embodiments of this application, the sliding part 310 and the connecting seat 320 can also be slidably adjusted by other components, such as a gas spring or an electric telescopic rod between them.

[0046] Please refer to the attached document. Figure 7 In some embodiments of this application, the bottom of the slide groove 101 is hollowed out and has a vertically extending clearance groove 102. The front end of the sliding part 310 is connected to the rear end of the lumbar support body 2. The rear end of the threaded adjustment rod 330 passes through the connecting seat 320 and the clearance groove 102. The stepless adjustment assembly also includes a knob 340, which is connected to the end of the threaded adjustment rod 330 that passes through the clearance groove 102. The knob 340 is configured to drive the threaded adjustment rod 330 to rotate. By setting the knob 340, it is convenient for the user to rotate and adjust the threaded adjustment rod 330, thereby making the depth adjustment operation of the lumbar support body 2 simpler.

[0047] In this design, by connecting the front end of the sliding part 310 to the rear end of the lumbar support body 2, the connecting seat 320 and the sliding groove 101 are slidably engaged. The sliding groove 101 is provided on the back support 1, so that the knob 340 can be exposed on the rear side of the back support 1 for easy adjustment by the user.

[0048] The connecting seat 320 has a through hole 325 at its rear end, which is hollowed out along the front-to-back direction. Along its length, the threaded adjusting rod 330 includes a threaded portion 331, a limiting portion 332, and a knob connecting portion 333. The threaded portion 331 has an external thread and is threadedly connected to the sliding portion 310 through an internal threaded hole 311. The diameter of the limiting portion 332 is larger than the diameter of the through hole 325. The knob connecting portion 333 passes through the through hole 325 and is connected to the knob 340. The limiting portion 332 abuts against the front side of the connecting seat 320. Thus, the threaded adjusting rod 330 is limited in the front-to-back direction by the limiting portion 332 and the knob 340, maintaining relative fixation with the connecting seat 320 in the front-to-back direction. When the user rotates the knob 340, the knob connecting portion 333 rotates within the through hole 325, causing the threaded portion 331 on the front side to rotate within the internal threaded hole 311, which in turn causes the sliding portion 310 to slide back and forth relative to the connecting seat 320. The knob connecting part 333 has a pentagonal cross-section, and the knob 340 has a corresponding pentagonal slot, so that the two are fixed in the circumferential direction after being snapped together. After the knob connecting part 333 is snapped into the knob 340, the two are detachably connected by screws, which facilitates installation and disassembly.

[0049] The front end of the sliding part 310 extends to form two symmetrical lumbar support connecting parts 312. The two lumbar support connecting parts 312 are respectively connected to the left and right sides of the rear end of the lumbar support body 2. This not only increases the connection strength between the sliding part 310 and the lumbar support body 2, but also allows the pushing and pulling force applied by the sliding part 310 to be better transmitted to the lumbar support body 2, making the depth adjustment operation of the lumbar support body 2 more stable and smooth.

[0050] Of course, in other embodiments of this application, the connecting seat 320 can also be connected to the rear end of the lumbar support body 2, and the sliding part 310 and the sliding groove 101 can be slidably connected.

[0051] Please refer to the attached document. Figure 7-11 In some embodiments of this application, the positioning component includes a stop member 120 and an elastic member 350. The stop member 120 is disposed in one of the groove bottom of the slide 101 and the telescopic component 3, and the elastic member 350 is disposed in the other of the groove bottom of the slide 101 and the telescopic component 3. One side of the stop member 120 has a plurality of toothed grooves 121. The elastic member 350 is provided with a locking head 351 that engages with the toothed grooves 121. The elastic member 350 always applies a spring force to the locking head 351 to engage in the direction of the toothed grooves. When the telescopic component 3 slides up and down along the slide 101, the locking head 351 engages with the plurality of toothed grooves 121 in sequence under the spring force of the elastic member 350.

[0052] In this embodiment, when the user leans against the lumbar support body 2, the locking head 351 on the elastic member 350 engages in the toothed groove 121, thus fixing the lumbar support body 2 and the back support 1 relatively. When the lumbar support body 2 needs to be adjusted, the telescopic component 3 slides relative to the slide groove 101, causing the elastic member 350 to move up and down relative to the position member 120. Because the locking head 351 engages in the toothed groove 121, the elastic member 350 undergoes elastic deformation during movement, thereby driving the locking head 351 to slide out of the current toothed groove 121 and slide into the previous or next toothed groove 121 along the opening direction of the toothed groove 121 to achieve position adjustment of the lumbar support body 2. Thus, the user only needs to move the lumbar support body 2 up and down to adjust its height, without operating other parts or leaving the seat, making the operation simple and convenient.

[0053] Preferably, the shift member 120 has six grooves 121, meaning the lumbar support body 2 has six adjustable positions, providing a high degree of adjustment freedom. Of course, in other embodiments of this application, the number of grooves 121 on the shift member 120 can also be four, five, seven, etc.

[0054] Please refer to the attached document. Figure 7-11 In some embodiments of this application, a gear groove 130 is recessed on the bottom of the slide groove 101, a gear member 120 is disposed in the gear groove 130, and an annular gap is formed between the gear member 120 and the groove wall of the gear groove 130. The gap between the side of the gear member 120 with the toothed groove 121 and the groove wall of the gear groove 130 is the gear channel 131, and the gap between the side of the gear member 120 with the toothed groove 121 and the groove wall of the gear groove 130 is the reset channel 132. When the telescopic component 3 slides upward along the slide groove 101, the locking head 351 moves in the gear channel 131. When the telescopic component 3 slides downward along the slide groove 101, the locking head moves in the reset channel 132.

[0055] In this embodiment, by setting the gear slot 130, when the chuck 351 switches between adjacent toothed slots 121, the chuck 351 slides out of the toothed slot 121 and moves within the gear slot 131, making it less prone to deviation and making the gear adjustment process more stable. At the same time, when the waist support body 2 is adjusted to the highest position, the chuck 351 can be easily returned to the lowest position through the reset slot 132, making the gear reset operation more convenient.

[0056] By placing the gear shift groove 130 and the gear shift member 120 within the longer slide groove 101, the gear shift member 120 and the gear shift groove 130 can be set at a higher vertical height, meaning the lumbar support body 2 can have more adjustable gears. Of course, in other embodiments of this application, the gear shift groove 130 and the gear shift member 120 can also be formed within the telescopic assembly 3, with the elastic member 350 correspondingly disposed at the bottom of the slide groove 101.

[0057] Please refer to the attached document. Figure 8-11 In some embodiments of this application, the tooth groove 121 is inclined downward from the side near the gear channel 131 to the side near the reset channel 132.

[0058] In this embodiment, by tilting the toothed groove 121, when the user leans against the lumbar support body 2, the lumbar support body 2 is subjected to downward pressure. Because the toothed groove 121 is tilted downward, the locking head 351 can be stably locked at the bottom of the toothed groove 121, making it less likely to fall out and providing good stability. Furthermore, during gear shifting, only the lumbar support body 2 needs to be pulled upward, and the locking head 351 can slide out along the inclined surface of the toothed groove 121 and smoothly lock into the next toothed groove 121, thereby making the gear adjustment operation simpler and smoother.

[0059] Preferably, the upper and lower end faces of the shift member 120 are also inclined downward from the side near the shift channel 131 to the side near the reset channel 132. This allows the lumbar support body 2 to be adjusted to the highest position by simply sliding the lumbar support body 2 downward, and the locking head 351 can slide into the reset channel 132 along the inclined surface at the top of the shift member 120. This prevents the lumbar support body 2 from slipping into the shift channel 131, making the reset operation of the lumbar support body 2 simpler and smoother. When the lumbar support body 2 is reset to the lowest position, the lumbar support body 2 can be adjusted upward by simply sliding the lumbar support body 2 upward, and the locking head 315 can slide into the shift channel 131 along the inclined surface at the bottom of the shift member 120. This prevents the lumbar support body 2 from slipping into the reset channel 132, making the shift adjustment operation of the lumbar support body 2 simpler and smoother.

[0060] Please refer to the attached document. Figure 13In some embodiments of this application, the elastic member 350 is an elastic rod. The upper end of the elastic member 350 is fixed to the bottom of the groove 101 or the telescopic component 3, and the lower end of the elastic member 350 is bent to form a locking head 351. When the elastic member 350 is affected by external force, the lower part of the elastic member 350 undergoes elastic deformation, thereby causing the locking head 351 to swing left and right.

[0061] Preferably, the elastic element 350 is a steel rod. The elastic element 350 has a simple overall structure, is easy to process and manufacture, and has good elastic deformation capability. When the elastic element 350 is deformed by force, it can be reset by its own elasticity, making the gear adjustment process more stable.

[0062] Please refer to the attached document. Figure 13 In some embodiments of this application, the elastic element 350 is detachably connected to the connecting seat 320. The upper end of the elastic element 350 is bent forward to form a plug-in portion 352. The connecting seat 320 has a plug-in hole 322 hollowed out along its front and back sides. The plug-in portion 352 and the plug-in hole 322 are plugged into each other. Installing the elastic element 350 by plugging in makes the installation and removal of the elastic element 350 relatively simple.

[0063] Please refer to the attached document. Figure 13 In some embodiments of this application, the rear end of the connector 320 is further provided with a positioning part 323, and the positioning part 323 is recessed with a positioning groove 324 extending in the vertical direction. When the insertion part 352 is inserted into the insertion hole 322, the upper part of the elastic member 350 is engaged in the positioning groove 324. The positioning part 323 is configured as a connecting screw, and the nut part of the screw fixes the upper part of the elastic member 350 to the positioning groove 324.

[0064] In this embodiment, by recessing a positioning groove 324 on the positioning part 323, the left and right sides of the elastic member 350 are limited by the positioning groove 324. Furthermore, a screw is screwed onto the positioning part 323, and the nut of the screw presses the elastic member 350 into the positioning groove 324, so that the elastic member 350 and the connecting seat 320 remain relatively fixed in the horizontal direction, and the connection strength is good. Moreover, when it is necessary to disassemble the elastic member 350, it is only necessary to unscrew the screw on the positioning part 323 to remove the elastic member 350 again, making the installation and disassembly operation of the elastic member 350 relatively simple.

[0065] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not 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. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0066] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A multi-directional adjustment mechanism for a lumbar support, characterized in that, The device includes a back support (1) and a lumbar support body (2) located in front of the back support (1). A height adjustment assembly is provided between the back support (1) and the lumbar support body (2). The height adjustment assembly includes a telescopic assembly (3) and a sliding groove (101). The telescopic assembly (3) is located at one of the front end of the back support (1) and the rear end of the lumbar support body (2). The sliding groove (101) is vertically opened at the other of the front end of the back support (1) and the rear end of the lumbar support body (2). The telescopic assembly (3) can slide up and down along the sliding groove (101), and the telescopic assembly (3) can be fixed at any height position by a positioning assembly. The sliding groove (101) allows the lumbar support body (2) to slide up and down relative to the back support (1) to adjust its height. The telescopic component (3) includes a sliding part (310) and a connecting seat (320) that are spliced ​​together. One end of the connecting seat (320) is recessed along the front and back direction to form a sleeve groove (321). The sliding part (310) is slidably connected to the connecting seat (320) through the sleeve groove (321). When the sliding part (310) slides back and forth relative to the connecting seat (320), the overall length of the telescopic component (3) is extended or shortened, thereby allowing the lumbar support body (2) to move back and forth relative to the back support (1) to adjust the distance. The positioning component includes a stop (120) and an elastic element (350). The stop (120) is disposed in one of the bottom of the slide groove (101) and the telescopic component (3). The elastic element (350) is disposed in the other of the stop (120) and the telescopic component (3). One side of the stop (120) has multiple toothed grooves (121). The elastic element (350) is provided with a locking head (351) that engages with the toothed grooves (121). The elastic element (350) always applies a spring force to the locking head (351) to engage in the direction of the toothed grooves. When the telescopic component (3) slides up and down along the slide groove (101), the locking head (351) engages with the multiple toothed grooves (121) in sequence under the spring force of the elastic element (350). The elastic element (350) is an elastic rod. The upper end of the elastic element (350) is fixed to the bottom of the groove (101) or the telescopic component (3). The lower end of the elastic element (350) is bent to form the clamp head (351). When the elastic element (350) is affected by external force, the lower part of the elastic element (350) undergoes elastic deformation, thereby driving the clamp head (351) to swing left and right.

2. The lumbar support multi-directional adjustment mechanism according to claim 1, characterized in that, The back support (1) includes a sliding support portion (110) extending in a vertical direction. The front end of the sliding support portion (110) is recessed to form the groove (101). One of the sliding portion (310) and the connecting seat (320) is disposed at the rear end of the lumbar support body (2). The other of the sliding portion (310) and the connecting seat (320) is slidably connected to the groove (101).

3. The lumbar support multi-directional adjustment mechanism according to claim 1, characterized in that, The telescopic assembly (3) is also provided with a stepless adjustment assembly, which includes a threaded adjustment rod (330) with external threads. The sliding part (310) is provided with an internal threaded hole (311) extending in the front-back direction. The threaded adjustment rod (330) is disposed in the sleeve groove (321). One end of the threaded adjustment rod (330) is rotatably connected to the connecting seat (320) and can rotate in its own circumference. The other end of the threaded adjustment rod (330) is threadedly connected to the sliding part (310) through the internal threaded hole (311). When the threaded adjustment rod (330) rotates, the sliding part (310) is driven to slide back and forth relative to the connecting seat (320).

4. The lumbar support multi-directional adjustment mechanism according to claim 3, characterized in that, The bottom of the groove (101) is hollowed out and has a clearance groove (102) extending in the vertical direction. The front end of the sliding part (310) is connected to the rear end of the waist support body (2). The rear end of the threaded adjustment rod (330) passes through the connecting seat (320) and the clearance groove (102). The stepless adjustment assembly also includes a knob (340). The knob (340) is connected to the end of the threaded adjustment rod (330) that passes through the clearance groove (102). The knob (340) is configured to drive the threaded adjustment rod (330) to rotate.

5. The lumbar support multi-directional adjustment mechanism according to claim 1, characterized in that, The slide groove (101) has a recessed gear groove (130) at the bottom. The gear member (120) is disposed in the gear groove (130), and an annular gap is formed between the gear member (120) and the groove wall of the gear groove (130). The gap between the side of the gear member (120) with the toothed groove (121) and the groove wall of the gear groove (130) is the gear channel (131). The gap between the side of the gear member (120) with the toothed groove (121) and the groove wall of the gear groove (130) is the reset channel (132). When the telescopic component (3) slides upward along the slide groove (101), the locking head (351) moves in the gear channel (131). When the telescopic component (3) slides downward along the slide groove (101), the locking head moves in the reset channel (132).

6. The lumbar support multi-directional adjustment mechanism according to claim 5, characterized in that, The tooth groove (121) is inclined downward from the side near the gear slot (131) to the side near the reset slot (132).

7. The lumbar support multi-directional adjustment mechanism according to claim 1, characterized in that, The elastic element (350) is detachably connected to the connecting seat (320). The upper end of the elastic element (350) is bent forward to form a plug-in part (352). The connecting seat (320) has a plug-in hole (322) hollowed out along the front and back sides. The plug-in part (352) and the plug-in hole (322) are plugged in and engaged.

8. The lumbar support multi-directional adjustment mechanism according to claim 7, characterized in that, The rear end of the connector (320) also has a positioning part (323) protruding out. The positioning part (323) is recessed and has a positioning groove (324) extending in the vertical direction. When the plug-in part (352) is plugged into the plug-in hole (322), the upper part of the elastic member (350) is engaged in the positioning groove (324). The positioning part (323) is configured as a connecting screw, and the nut of the screw fixes the upper part of the elastic member (350) to the positioning groove (324).

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