Sitting and leaning device for lumbar vertebra conditioning

Abstract

The invention relates to the technical field of lumbar vertebra conditioning, and discloses a sitting and leaning device for lumbar vertebra conditioning, which comprises a backrest fixing mechanism, an anti-forward-sliding supporting mechanism is arranged at the bottom of the backrest fixing mechanism, a height adjusting mechanism is movably mounted on the surface of the backrest fixing mechanism, and a waist leaning mechanism is arranged on the outer side of the height adjusting mechanism. According to the sitting and leaning device for lumbar vertebra conditioning, through the arrangement of the backrest fixing mechanism, the forward-sliding-preventing supporting mechanism, the height adjusting mechanism and the waist leaning mechanism, an upward protrusion can be formed on the surface of the chair cushion through the forward-sliding-preventing supporting mechanism in the using process, so that unexpected sliding and forward moving of the buttocks of a user are effectively limited; therefore, the waist of the user can be continuously and stably attached to the waist leaning mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lumbar spine conditioning, in particular to a lumbar spine conditioning seat. BACKGROUND

[0002] A waist support cushion is an auxiliary tool for relieving discomfort caused by long sitting by physically supporting the lumbar spine and correcting the sitting posture, mainly targeting long-term desk workers. Its core functions include dispersing the pressure on the lumbar spine and maintaining the neutral position of the spine.

[0003] In the current market for seat devices, most products require the user's waist to be fitted to a pre-set support position. However, in actual use, users may dynamically adjust their sitting posture due to fatigue or in search of comfort. This unconscious change in body position often causes the hips to gradually move forward, resulting in a decrease in the fit of the waist to the support device, ultimately weakening or even failing the lumbar support effect. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a lumbar spine conditioning seat that solves the problems mentioned in the background.

[0005] The present application provides the following technical solution: a lumbar spine conditioning seat, comprising: a backrest fixing mechanism, the bottom of the backrest fixing mechanism is provided with an anti-forward sliding support mechanism, the surface of the backrest fixing mechanism is movably provided with a height adjusting mechanism, the outer side of the height adjusting mechanism is provided with a waist supporting mechanism, the backrest fixing mechanism comprises a main seat, the anti-forward sliding support mechanism comprises a rotating downward tilting rod, an extended blocking rod, an anti-forward sliding support pad and an adjusting screw cylinder, the rotating downward tilting rod is rotatably connected to the bottom of the main seat through a bearing, the extended blocking rod is movably arranged on one side of the rotating downward tilting rod, the anti-forward sliding support pad is rotatably connected to the surface of the extended blocking rod through a bearing, and the adjusting screw cylinder is movably arranged between the rotating downward tilting rod and the extended blocking rod, the height adjusting mechanism comprises a lifting seat, the lifting seat is movably arranged above the main seat, and the waist supporting mechanism comprises a rotating seat, the rotating seat is rotatably connected to the outer side of the lifting seat.

[0006] Preferably, the backrest fixing mechanism further comprises a buffer ring, an upper edge sliding column, a lifting threaded column, a connecting block, a damping block, a sealing piece, an inner sliding channel and a limiting block, the buffer ring is fixedly connected to both ends of the main seat, the upper edge sliding column is fixedly connected to the top of the main seat, the lifting threaded column is rotatably connected to the top of the main seat through a bearing, the connecting block is fixedly connected to the top ends of the upper edge sliding column and the lifting threaded column, the damping block is fixedly connected to the bottom of the main seat, the inner wall of the damping block is slidably connected to the surface of the rotating downward tilting rod, the sealing piece is fixedly connected to the inner wall of the main seat, the inner sliding channel is formed in the inner portion of the main seat, and the limiting block is integrally arranged on the inner wall of the inner sliding channel.

[0007] Preferably, the backrest fixing mechanism further comprises two extension pieces, two limiting openings, a hook, an extension bar, a rack, two side grooves, a synchronous gear, a reed seat and a fixed spring piece, both of the extension pieces are slidingly connected to the inner side of the inner slide, the limiting openings are respectively formed on the surface of the extension pieces, the hook is integrally arranged on the outer side of the extension piece, the extension bar is integrally arranged on one side of the extension piece, the rack is fixedly connected to the inner side of the extension bar, the side grooves are formed on the outer side of the extension bar, the inner wall of the side groove is slidingly connected with the surface of the limiting block, the number of the side grooves is two, and the two side grooves are staggered, the synchronous gear is rotatably connected to the inner side of the inner slide, the surface of the synchronous gear is meshingly connected with the surface of the two racks, the reed seat is fixedly connected to the inner side of the main backrest, and the fixed spring piece is fixedly connected between the reed seat and the limiting opening, and the inner wall of the limiting opening is slidingly connected with the surface of the reed seat.

[0008] Preferably, the front sliding prevention supporting mechanism further comprises a first threaded head, a second threaded head and a damping ring, the first threaded head is integrally arranged at both ends of the rotating lower lifting rod, the second threaded head is integrally arranged at both ends of the extension gear lever, the damping ring is fixedly connected to the inner side of the front sliding prevention supporting pad, the surface of the damping ring is slidingly connected with the surface of the extension gear lever, and the inner side of the adjusting screw cylinder is provided with a bidirectional internal thread, and the adjusting screw cylinder is threadedly connected with the first threaded head and the second threaded head through the bidirectional internal thread.

[0009] Preferably, the front sliding prevention supporting mechanism further comprises an upward lifting pad, a mounting shell, a supporting leg, a ratchet wheel and a pushing groove, the upward lifting pad is rotatably connected to the surface of the extension gear lever through a bearing, the mounting shell is fixedly connected to the inner side of the upward lifting pad, the supporting leg is rotatably connected to the inner side of the mounting shell, the ratchet wheel is integrally arranged in the inner side of the supporting leg, and the pushing groove is formed on one side of the supporting leg.

[0010] Preferably, the front sliding prevention supporting mechanism further comprises a pawl, a pressing piece and an engaging spring piece, the pawl is rotatably connected to the inner wall of the mounting shell and is meshingly connected with the ratchet wheel, the pressing piece is integrally arranged on one side of the pawl, and the engaging spring piece is fixedly connected to the inner wall of the mounting shell and slidingly connected with the surface of the pawl.

[0011] Preferably, the height adjusting mechanism further comprises a hidden groove, a threaded cylinder, a pushing wheel and a sliding hole, the hidden groove is inlaidly formed on the outer side of the lifting seat, the threaded cylinder is rotatably connected to the inner side of the lifting seat through a bearing, the pushing wheel is fixedly sleeved in the inner side of the threaded cylinder, the sliding hole is formed on the surface of the lifting seat, the inner wall of the sliding hole is slidingly connected with the surface of the upper edge sliding column, and the inner wall of the threaded cylinder is threadedly connected with the surface of the lifting threaded column.

[0012] Preferably, the waist leaning mechanism further comprises a first tension spring, a sliding groove, an end block, a supporting column, a sliding seat and an extrusion spring, the first tension spring is fixedly connected between the lifting seat and the rotating seat, the sliding groove is arranged in the first tension spring, the end block is fixedly connected to the sliding groove, the supporting column is fixedly connected between the two end blocks, the sliding seat is slidably connected to the sliding groove, the inner wall of the sliding seat is slidably connected to the surface of the end block, and the extrusion spring is movably sleeved on the surface of the supporting column and located between the end block and the sliding seat.

[0013] Preferably, the waist leaning mechanism further comprises a first tension spring, a sliding groove, an end block, a supporting column, a sliding seat and an extrusion spring, the first tension spring is fixedly connected between the lifting seat and the rotating seat, the sliding groove is arranged in the first tension spring, the end block is fixedly connected to the sliding groove, the supporting column is fixedly connected between the two end blocks, the sliding seat is slidably connected to the sliding groove, the inner wall of the sliding seat is slidably connected to the surface of the end block, and the extrusion spring is movably sleeved on the surface of the supporting column and located between the end block and the sliding seat.

[0014] Preferably, the waist leaning mechanism further comprises a first tension spring, a sliding groove, an end block, a supporting column, a sliding seat and an extrusion spring, the first tension spring is fixedly connected between the lifting seat and the rotating seat, the sliding groove is arranged in the first tension spring, the end block is fixedly connected to the sliding groove, the supporting column is fixedly connected between the two end blocks, the sliding seat is slidably connected to the sliding groove, the inner wall of the sliding seat is slidably connected to the surface of the end block, and the extrusion spring is movably sleeved on the surface of the supporting column and located between the end block and the sliding seat.

[0015] Compared with the prior art, the present application has the following advantages: The lumbar spine conditioning seat leaning device can form an upward protrusion on the surface of the chair cushion by using the anti-forward sliding support mechanism during use, thereby effectively limiting the unintended sliding and forward movement of the user's hips, and ensuring that the user's waist can be continuously and stably attached to the waist leaning mechanism.

[0016] The lumbar spine conditioning seat leaning device can be fixedly clamped to the chair back by using the hook during use, thereby avoiding easy disengagement of the device.

[0017] The lumbar spine conditioning seat leaning device can form an upward protrusion on the surface of the chair cushion by using the anti-forward sliding support mechanism during use, thereby effectively limiting the unintended sliding and forward movement of the user's hips, and ensuring that the user's waist can be continuously and stably attached to the waist leaning mechanism.

[0018] This lumbar support device, through its adjustable seat, internal groove, threaded cylinder, actuating wheel, and sliding hole, allows for height adjustment during use by utilizing the cooperation of the adjustable seat and the adjustable threaded column, ensuring that different users can adjust to a suitable lumbar support height.

[0019] This lumbar spine adjustment sitting device, through its rotating seat, first tension spring, slide groove, end block, support column, sliding seat, compression spring, pull rod, connecting rod, connecting fork head, second tension spring, lumbar support plate, and buffer pad, allows for adjustment of the lumbar support plate's angle in both vertical and horizontal directions during use, thereby ensuring a proper fit for the lower back. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the upward-curving pad structure of the present invention when it is curved upwards; Figure 3 This is a rear view of the present invention; Figure 4 This is a schematic diagram of the explosion structure of the anti-slip support mechanism of the present invention; Figure 5 This is a cross-sectional view of the interior of the mounting shell of the present invention; Figure 6 This is an exploded structural diagram of the backrest fixing mechanism of the present invention; Figure 7 This is a schematic diagram of the structure at the position of the waist support mechanism of the present invention; Figure 8 This is a schematic diagram of the structure at the location of the rotating seat in this invention; Figure 9 This is an internal sectional view of the main support seat of the present invention.

[0021] In the picture: 101. Main support; 102. Buffer ring; 103. Upper edge slide column; 104. Lifting threaded column; 105. Connecting block; 106. Damping block; 107. Sealing plate; 108. Inner slide; 109. Limiting block; 110. Extension plate; 111. Restriction port; 112. Hook; 113. Extension strip; 114. Rack; 115. Side groove; 116. Synchronous gear; 117. Spring seat; 118. Fixed spring plate; 201. Rotating lower rocker arm; 202. Extension stop rod; 203. Anti-slip support pad; 204. Adjusting screw; 205. First threaded head; 206. Second threaded head; 207. Resistance 208. Neck ring; 209. Upward-curving pad; 210. Mounting housing; 211. Support foot; 212. Ratchet; 213. Actuating groove; 214. Pad; 215. Lower pressure plate; 216. Engaging spring plate; 301. Lifting seat; 302. Internal groove; 303. Threaded cylinder; 304. Actuating wheel; 305. Sliding hole; 401. Rotating seat; 402. First tension spring plate; 403. Sliding groove; 404. End block; 405. Support column; 406. Sliding seat; 407. Compression spring; 408. Pull rod; 409. Connecting rod; 410. Connecting fork head; 411. Second tension spring plate; 412. Waist support plate; 413. Buffer pad. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-9A lumbar support device for lumbar spine adjustment includes: a backrest fixing mechanism, an anti-slip support mechanism at the bottom of the backrest fixing mechanism, a height adjustment mechanism movably mounted on the surface of the backrest fixing mechanism, and a lumbar support mechanism on the outer side of the height adjustment mechanism. The backrest fixing mechanism includes a main backrest 101, and the anti-slip support mechanism includes a rotating lowering rod 201, an extension stop rod 202, an anti-slip support pad 203, and an adjusting screw 204. The rotating lowering rod 201 is rotatably connected to the bottom of the main backrest 101 via a bearing, the extension stop rod 202 is movably disposed on one side of the rotating lowering rod 201, and the anti-slip support pad 203 is rotatably connected to the extension stop rod via a bearing. On the surface of 202, the adjusting screw 204 is movably disposed between the rotating lower rocker arm 201 and the extension stop lever 202. The height adjustment mechanism includes a lifting seat 301, which is movably disposed above the main backrest 101. The lumbar support mechanism includes a rotating seat 401, which is rotatably connected to the outside of the lifting seat 301. Through the backrest fixing mechanism, the anti-slip support mechanism, the height adjustment mechanism and the lumbar support mechanism, an upward protrusion can be formed on the surface of the seat cushion by the anti-slip support mechanism during use, thereby effectively limiting the unintended sliding and forward movement of the user's buttocks, thus ensuring that the user's waist can be continuously and stably attached to the lumbar support mechanism.

[0024] The backrest fixing mechanism includes a buffer ring 102, an upper edge slide column 103, a lifting threaded column 104, a connecting block 105, a damping block 106, a sealing piece 107, an inner slide rail 108, and a limiting block 109. The buffer ring 102 is fixedly connected to both ends of the main backrest 101. The upper edge slide column 103 is fixedly connected to the top of the main backrest 101. The lifting threaded column 104 is rotatably connected to the top of the main backrest 101 via a bearing. The connecting block 105 is fixedly connected to the top ends of the upper edge slide column 103 and the lifting threaded column 104. The damping block 106 is fixedly connected to the bottom of the main backrest 101, and the inner wall of the damping block 106 is slidably connected to the surface of the rotating lower rocker arm 201. The sealing piece 107 is fixedly connected to the inner wall of the main backrest 101. The inner slide rail 108 extends through the interior of the main backrest 101. The limiting block 109 is integrally set on the inner wall of the inner slide rail 108.

[0025] The backrest fixing mechanism includes an extension piece 110, a limiting opening 111, a hook 112, an extension strip 113, a rack 114, a side groove 115, a synchronous gear 116, a spring seat 117, and a fixing spring sheet 118. There are two extension pieces 110, both slidably connected to the inside of the inner slide rail 108. The limiting opening 111 is respectively opened through the surfaces of the two extension pieces 110. The hook 112 is integrally disposed on the outer side of the extension piece 110. The extension strip 113 is integrally disposed on one side of the extension piece 110. The rack 114 is fixedly connected to the inner side of the extension strip 113. The side groove 115 is opened on the outer side of the extension strip 113, and the inner wall of the side groove 115 is slidably connected to the surface of the limiting block 109. There are two side grooves 115, and they are staggered. The synchronous gear 116 is rotatably connected to the inner slide rail 108. Inside the slide 108, the surface of the synchronous gear 116 is meshed with the surfaces of the two racks 114 respectively. The spring seat 117 is fixedly connected inside the main backrest 101. The fixed spring plate 118 is fixedly connected between the spring seat 117 and the limiting port 111. The inner wall of the limiting port 111 is slidably connected to the surface of the spring seat 117. Through the main backrest 101, buffer ring 102, upper edge slide column 103, lifting thread column 104, connecting block 105, damping block 106, sealing plate 107, inner slide 108, limiting block 109, extension plate 110, limiting port 111, hook 112, extension bar 113, rack 114, side groove 115, synchronous gear 116, spring seat 117 and fixed spring plate 118, the hook 112 can be used to fix and clamp the chair back when in use, thereby preventing the device from easily falling off.

[0026] The anti-slip support mechanism includes a first threaded head 205, a second threaded head 206, and a damping ring 207. The first threaded head 205 is integrally disposed at both ends of the rotating lower rocker arm 201, and the second threaded head 206 is integrally disposed at both ends of the extension stop rod 202. The damping ring 207 is fixedly connected to the inside of the anti-slip support pad 203, and the surface of the damping ring 207 is slidably connected to the surface of the extension stop rod 202. The adjusting screw 204 is provided with a bidirectional internal thread, and the adjusting screw 204 is threadedly connected to both the first threaded head 205 and the second threaded head 206 through the bidirectional internal thread.

[0027] The anti-slip support mechanism also includes an uplift pad 208, a mounting shell 209, a support foot 210, a ratchet 211, and a toggle groove 212. The uplift pad 208 is rotatably connected to the surface of the extension stop rod 202 via a bearing. The mounting shell 209 is fixedly connected to the inside of the uplift pad 208. The support foot 210 is rotatably connected to the inside of the mounting shell 209. The ratchet 211 is integrally set inside the support foot 210. The toggle groove 212 is opened on one side of the support foot 210.

[0028] The anti-slip support mechanism includes a pawl 213, a lower pressure plate 214, and a meshing spring plate 215. The pawl 213 is rotatably connected to the inner wall of the mounting housing 209 and meshes with the ratchet 211. The lower pressure plate 214 is integrally disposed on one side of the pawl 213. The meshing spring plate 215 is fixedly connected to the inner wall of the mounting housing 209, and the surface of the lower meshing spring plate 215 is slidably connected to the surface of the pawl 213. The mechanism is activated by a rotating lower lever 201, an extension stop lever 202, an anti-slip support pad 203, and an adjustment mechanism. The screw barrel 204, the first threaded head 205, the second threaded head 206, the damping ring 207, the uplifting pad 208, the mounting shell 209, the support foot 210, the ratchet 211, the actuating groove 212, the pawl 213, the lower pressure plate 214, and the engaging spring plate 215 can restrict the forward movement of the buttocks by forming an upper protrusion on the anti-slip support pad 203. At the same time, the anti-slip support pad 203 can be adjusted to a suitable position by adjusting the torsion of the screw barrel 204. And when necessary, the uplifting of the uplifting pad 208 can be used to enhance the blocking effect.

[0029] The height adjustment mechanism includes an inner groove 302, a threaded cylinder 303, a turn wheel 304, and a sliding hole 305. The inner groove 302 is embedded on the outside of the lifting seat 301. The threaded cylinder 303 is rotatably connected to the inside of the lifting seat 301 via a bearing. The turn wheel 304 is fixedly sleeved inside the threaded cylinder 303. The sliding hole 305 is formed through the surface of the lifting seat 301, and the inner wall of the sliding hole 305 is slidably connected to the surface of the upper sliding column 103. The inner wall of the threaded cylinder 303 is threadedly connected to the surface of the lifting threaded column 104. Through the lifting seat 301, inner groove 302, threaded cylinder 303, turn wheel 304, and sliding hole 305, the height can be adjusted by the cooperation of the lifting seat 301 and the lifting threaded column 104 during use, ensuring that different users can adjust to a suitable backrest height.

[0030] The lumbar support mechanism also includes a first tension spring 402, a slide groove 403, an end block 404, a support column 405, a sliding seat 406, and a compression spring 407. The first tension spring 402 is fixedly connected between the lifting seat 301 and the rotating seat 401. The slide groove 403 is opened through the interior of the first tension spring 402. The end blocks 404 are fixedly connected to the interiors of both ends of the slide groove 403. The support column 405 is fixedly connected between the two end blocks 404. The sliding seat 406 is slidably connected to the interior of the slide groove 403, and the inner wall of the sliding seat 406 is slidably connected to the surface of the end block 404. The compression spring 407 is movably sleeved on the surface of the support column 405, and the compression spring 407 is located between the end block 404 and the sliding seat 406.

[0031] The lumbar support mechanism also includes a pull rod 408, a connecting rod 409, a docking fork head 410, and a second tension spring 411. There are two pull rods 408, and the two pull rods 408 are rotatably connected to the surfaces at both ends of the rotating seat 401. The connecting rod 409 is rotatably connected between the pull rod 408 and the sliding seat 406. The docking fork head 410 is rotatably connected to one end of the pull rod 408. The second tension spring 411 is fixedly connected between the docking fork head 410 and the connecting rod 409.

[0032] The lumbar support mechanism also includes a lumbar support plate 412 and a buffer pad 413. The lumbar support plate 412 is fixedly connected to one side of the docking fork head 410, and the buffer pad 413 is fixedly connected to the surface of the lumbar support plate 412. Through the provided rotating seat 401, first tension spring 402, slide groove 403, end block 404, support column 405, sliding seat 406, compression spring 407, pull rod 408, connecting rod 409, docking fork head 410, second tension spring 411, lumbar support plate 412 and buffer pad 413, the lumbar support plate 412 can be adjusted in the up and down and left and right directions during use by rotating seat 401 and pull rod 408, thereby ensuring the fit of the lumbar support.

[0033] Working principle: When in use, pull the hook 112. The hook 112 drives the rack 114 to slide outward synchronously through the extension piece 110 and the extension strip 113. The rack 114 drives the other rack 114 to move in the opposite direction through the synchronous gear 116, so that the two hooks 112 open to both sides synchronously. Then, the back of the main backrest 101 is pressed against the chair back, and the lower surface of the anti-slip support pad 203 is pressed against the chair cushion. At the same time, the lower rocker arm 201 and the end of the extension stop rod 202 are adjusted and rotated so that the two ends sink into the sides of the chair cushion. Then, the hook 112 is released, and the fixed spring plate 118 rebounds and presses the hook 112 to reset, so that the two hooks 112 fix the chair back in the middle. Then, turn the dial wheel 304. The dial wheel 304 drives the threaded cylinder 303 to rotate. When the threaded cylinder 303 rotates, it moves up and down along the lifting threaded column 104 through the thread, thereby adjusting the height of the lifting seat 301. Then, the adjusting screw 204 is twisted. When the adjusting screw 204 is twisted, the first threaded head 205 and the second threaded head 206 are pushed by the thread, thereby adjusting the distance between the extension stop rod 202 and the rotating lower rocker arm 201, thereby adjusting the distance between the anti-slip support pad 203 and the main backrest 101. After adjusting the distance of the anti-slip support pad 203 and the height of the lifting seat 301 to a suitable position, the user sits on the chair. At this time, the user's waist is just resting on the surface of the buffer pad 413. When the user leans back, the waist will press against the docking fork head 410 through the buffer pad 413 and the lumbar support plate 412, thereby causing the pull rod 408 to rotate. The pull rod 408 pulls the sliding seat 406 through the connecting rod 409. The sliding seat 406 compresses the support column 405 to contract, thereby causing the reverse thrust of the support column 405 to form a compression support on the waist. When the patient adjusts their sitting posture, the anti-slip support pad 203 prevents the patient's buttocks from slipping out, thus ensuring that the position of the patient's buttocks is restricted and thus ensuring the fit of the waist. When a stronger limiting effect is needed, rotate the uplift pad 208, and the uplift pad 208 will rise. Then rotate the support foot 210 to form a triangular structure between the support foot 210, the uplift pad 208 and the seat cushion, so that the uplift pad 208 is maintained. The uplifted uplift pad 208 forms a blocking and restriction on the patient's groin area, thus providing a stronger limiting effect. When the uplift pad 208 is retracted, the lower pressure plate 214 is pressed down, which disengages the pawl 213 from the ratchet 211. Then the support foot 210 is rotated back, the lower pressure plate 214 is released, and the uplift pad 208 is rotated back into the anti-slip support pad 203, thus returning to the normal limit position.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lumbar spine adjustment sitting device, characterized in that, include: A backrest fixing mechanism is provided, with an anti-slip support mechanism at the bottom of the backrest fixing mechanism, a height adjustment mechanism is movably installed on the surface of the backrest fixing mechanism, and a lumbar support mechanism is provided on the outside of the height adjustment mechanism. The backrest fixing mechanism includes a main backrest (101), and the anti-slip support mechanism includes a rotating lower lever (201), an extension stop lever (202), an anti-slip support pad (203), and an adjusting screw (204). The rotating lower lever (201) is rotatably connected to the bottom of the main backrest (101) via a bearing. The extension stop lever (202) is movably disposed on one side of the rotating lower lever (201). The anti-slip support pad (203) is rotatably connected to the surface of the extension stop lever (202) via a bearing. The adjusting screw (204) is movably disposed between the rotating lower lever (201) and the extension stop lever (202). The height adjustment mechanism includes a lifting seat (301), which is movably disposed above the main backrest (101). The lumbar support mechanism includes a rotating seat (401), which is rotatably connected to the outside of the lifting seat (301).

2. The lumbar spine adjustment sitting device according to claim 1, characterized in that, The backrest fixing mechanism also includes a buffer ring (102), an upper edge slide column (103), a lifting threaded column (104), a connecting block (105), a damping block (106), a sealing piece (107), an inner slide rail (108), and a limiting block (109). The buffer ring (102) is fixedly connected to both ends of the main backrest (101), the upper edge slide column (103) is fixedly connected to the top of the main backrest (101), and the lifting threaded column (104) is rotatably connected to the top of the main backrest (101) through a bearing. The connecting block (105) is fixedly connected to the top of the upper sliding column (103) and the lifting threaded column (104). The damping block (106) is fixedly connected to the bottom of the main support (101), and the inner wall of the damping block (106) is slidably connected to the surface of the rotating lower rocker arm (201). The sealing plate (107) is fixedly connected to the inner wall of the main support (101). The inner slide (108) is opened through the interior of the main support (101). The limiting block (109) is integrally set on the inner wall of the inner slide (108).

3. A lumbar spine adjustment sitting device according to claim 2, characterized in that, The backrest fixing mechanism also includes an extension piece (110), a limiting port (111), a hook (112), an extension strip (113), a rack (114), a side groove (115), a synchronous gear (116), a spring seat (117), and a fixing spring sheet (118). There are two extension pieces (110), and both extension pieces (110) are slidably connected inside the inner slide rail (108). The limiting port (111) is respectively opened through the surface of the two extension pieces (110). The hook (112) is integrally disposed on the outside of the extension piece (110). The extension strip (113) is integrally disposed on one side of the extension piece (110). The rack (114) is fixedly connected to the extension strip (115). Inside 13), the side groove (115) is opened on the outside of the extension strip (113), and the inner wall of the side groove (115) is slidably connected to the surface of the limiting block (109). There are two side grooves (115), and the two side grooves (115) are staggered. The synchronous gear (116) is rotatably connected to the inside of the inner slide (108), and the surface of the synchronous gear (116) is meshed with the surfaces of the two racks (114). The spring seat (117) is fixedly connected to the inside of the main support (101). The fixed spring sheet (118) is fixedly connected between the spring seat (117) and the limiting port (111), and the inner wall of the limiting port (111) is slidably connected to the surface of the spring seat (117).

4. A lumbar spine adjustment sitting device according to claim 1, characterized in that, The anti-slip support mechanism further includes a first threaded head (205), a second threaded head (206), and a damping ring (207). The first threaded head (205) is integrally disposed at both ends of the rotating lower lever (201), and the second threaded head (206) is integrally disposed at both ends of the extension stop lever (202). The damping ring (207) is fixedly connected to the inside of the anti-slip support pad (203), and the surface of the damping ring (207) is slidably connected to the surface of the extension stop lever (202). The adjusting screw (204) is provided with a bidirectional internal thread, and the adjusting screw (204) is threadedly connected to both the first threaded head (205) and the second threaded head (206) through the bidirectional internal thread.

5. A lumbar spine adjustment sitting device according to claim 4, characterized in that, The anti-slip support mechanism also includes an uplift pad (208), a mounting shell (209), a support foot (210), a ratchet (211), and a toggle groove (212). The uplift pad (208) is rotatably connected to the surface of the extension stop rod (202) via a bearing. The mounting shell (209) is fixedly connected to the inside of the uplift pad (208). The support foot (210) is rotatably connected to the inside of the mounting shell (209). The ratchet (211) is integrally set inside the support foot (210). The toggle groove (212) is opened on one side of the support foot (210).

6. A lumbar spine adjustment sitting device according to claim 5, characterized in that, The anti-slip support mechanism also includes a pawl (213), a lower pressure plate (214), and a meshing spring plate (215). The pawl (213) is rotatably connected to the inner wall of the mounting shell (209), and the pawl (213) is meshed with the ratchet (211). The lower pressure plate (214) is integrally disposed on one side of the pawl (213). The meshing spring plate (215) is fixedly connected to the inner wall of the mounting shell (209), and the surface of the lower meshing spring plate (215) is slidably connected to the surface of the pawl (213).

7. A lumbar spine adjustment sitting device according to claim 1, characterized in that, The height adjustment mechanism also includes an inner groove (302), a threaded cylinder (303), a turn wheel (304), and a sliding hole (305). The inner groove (302) is embedded on the outside of the lifting seat (301). The threaded cylinder (303) is rotatably connected to the inside of the lifting seat (301) through a bearing. The turn wheel (304) is fixedly sleeved inside the threaded cylinder (303). The sliding hole (305) is opened through the surface of the lifting seat (301), and the inner wall of the sliding hole (305) is slidably connected to the surface of the upper sliding column (103). The inner wall of the threaded cylinder (303) is threadedly connected to the surface of the lifting threaded column (104).

8. A lumbar spine adjustment sitting device according to claim 1, characterized in that, The lumbar support mechanism further includes a first tension spring (402), a slide groove (403), an end block (404), a support column (405), a sliding seat (406), and a compression spring (407). The first tension spring (402) is fixedly connected between the lifting seat (301) and the rotating seat (401). The slide groove (403) is opened through the interior of the first tension spring (402). The end blocks (404) are fixedly connected to the interiors of the two ends of the slide groove (403). The support column (405) is fixedly connected between the two end blocks (404). The sliding seat (406) is slidably connected to the interior of the slide groove (403), and the inner wall of the sliding seat (406) is slidably connected to the surface of the end block (404). The compression spring (407) is movably sleeved on the surface of the support column (405), and the compression spring (407) is located between the end block (404) and the sliding seat (406).

9. A lumbar spine adjustment sitting device according to claim 8, characterized in that, The lumbar support mechanism also includes a pull rod (408), a connecting rod (409), a docking fork head (410), and a second tension spring (411). There are two pull rods (408), and the two pull rods (408) are rotatably connected to the surfaces at both ends of the rotating seat (401). The connecting rod (409) is rotatably connected between the pull rod (408) and the sliding seat (406). The docking fork head (410) is rotatably connected to one end of the pull rod (408). The second tension spring (411) is fixedly connected between the docking fork head (410) and the connecting rod (409).

10. A lumbar spine adjustment sitting device according to claim 9, characterized in that, The lumbar support mechanism also includes a lumbar support plate (412) and a buffer pad (413). The lumbar support plate (412) is fixedly connected to one side of the docking fork head (410), and the buffer pad (413) is fixedly connected to the surface of the lumbar support plate (412).

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