Self-adaptive multi-angle adjustable waist support

Abstract

The utility model relates to a self-adaptive multi-angle adjustable waist support. The technical problems that due to the fact that an existing waist rest cannot be adjusted in a self-adaptive mode, the supporting effect is poor in use, and the operation process is tedious in the adjusting process of the waist rest are solved. Comprising a chair back frame and a waist bracket movably arranged on one side of the chair back frame, a lifting fixed seat is installed on the side, close to the waist bracket, of the chair back frame, a lifting movable seat is movably arranged on the lifting fixed seat through an up-down lifting self-circulation mechanism, and the lifting movable seat is movably connected with a swing seat on the waist bracket through a circumferential swing connecting structure; an adjusting rod is arranged between the swing seat and the lifting movable seat in a penetrating mode, and a multi-gear locking mechanism is arranged between the adjusting rod and the swing seat and between the adjusting rod and the lifting movable seat. The multi-gear locking mechanism has the advantages that the angle between the chair back frame and the waist bracket is adjusted through the multi-gear locking mechanism, the whole operation is simple, the self-adaptive adjustment can be realized, the pressure borne by the waist can be accurately shared, the burden of waist muscles can be effectively relieved, and the waist fatigue can be relieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of seat waist support, specifically relates to a self -adaptation multi -angle adjustable waist support. BACKGROUND

[0002] In the process of daily work and study, long time standing will not only be harmful to the spine, cervical vertebra, and the damage to the waist is also big, and the chair of present times has the waist backrest to support the waist and provides comfortable experience for the user. The traditional waist backrest is mostly fixed shape and angle, cannot be adjusted according to the human posture, action and the body shape of different people, sitting posture habit etc. and lead to the poor supporting effect when using, cannot effectively reduce the waist pressure, and simultaneously due to the mounting structure of the waist backrest, the operation process is complicated in the adjusting process, is difficult to adjust quickly, affects the use experience and work efficiency. SUMMARY

[0003] The utility model aims at above -mentioned problem, provides a self -adaptation multi -angle adjustable waist support.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a self -adaptation multi -angle adjustable waist support, including the back frame and the waist support frame that is movably arranged at one side of the back frame, the side of the back frame close to the waist support frame is installed with the lifting fixed seat, the lifting fixed seat is movably provided with the lifting movable seat through the up-and-down lifting self-circulation mechanism, the lifting movable seat is movably connected with the swing seat on the waist support frame through the circumferential swing connecting structure, and the swing seat and the lifting movable seat are provided with the adjusting rod, and the adjusting rod is provided with the multi-gear locking mechanism between the swing seat and the lifting movable seat, which can make the adjusting rod axially move when the adjusting rod is circumferentially rotated to position the swing seat and the lifting movable seat. The mutual positioning of the swing seat and the lifting movable seat can be realized by the cooperation of the multi-gear locking mechanism and the adjusting rod, so that the activity angle of the waist support frame can be freely adjusted according to the demand, the overall adjusting structure is simple, convenient to operate, saves time and energy, and the lifting height of the lifting movable seat can be adjusted through the up-and-down lifting self-circulation mechanism, thereby improving the overall applicability.

[0005] In the above-mentioned self-adapting multi-angle adjustable waist support, the swing seat is arranged at one side of the lower end of the waist support frame, and the swing seat has a containing groove on the side close to the lifting movable seat, and the lifting movable seat has a movable mounting portion on one side, and the movable mounting portion is arranged in the containing groove through a pin shaft.

[0006] In the adaptive multi-angle adjustable waist support, the circumferential swing connecting structure comprises a swing mounting hole transversely arranged at the lower end of the swing seat and penetrating the lower end of the accommodating groove, the pin shaft is arranged in the swing mounting hole, the lower end of the movable mounting part is provided with a swing hinged hole through which the pin shaft penetrates, the movable mounting part is hinged to the pin shaft, and the swing reset spring is arranged between the bottom of the accommodating groove and the movable mounting part. The swing seat and the lifting movable seat are connected through the pin shaft, the waist support frame can swing around the swing seat, and the stability of the waist support frame during adjustment can be ensured by using the swing reset spring.

[0007] In the adaptive multi-angle adjustable waist support, the multi-gear locking mechanism comprises an adjusting rod locking hole arranged at one side of the upper end of the swing seat and an adjusting rod movable hole arranged at the other side of the upper end of the swing seat, the adjusting rod locking hole and the adjusting rod movable hole correspond to each other and are communicated through the accommodating groove, one end of the adjusting rod penetrates the adjusting rod locking hole, penetrates the accommodating groove and extends into the adjusting rod movable hole, the circumferential swing limiting component is arranged between the movable mounting part and the adjusting rod, and the multi-gear locking component is arranged between the adjusting rod, the movable mounting part and the swing seat.

[0008] In the adaptive multi-angle adjustable waist support, the circumferential swing limiting component comprises an arc-shaped swing movable hole arranged at one side of the upper end of the movable mounting part, the swing movable hole is circumferentially arranged around the center of the pin shaft, and the adjusting rod is movably arranged in the swing movable hole. The adjusting rod is connected to the swing seat, and the adjusting rod moves in the swing movable hole, so that the swing movable hole is used to limit the adjustment range of the waist support frame.

[0009] In the adaptive multi-angle adjustable waist support, the multi-gear locking component is a double-gear locking component, the multi-gear locking component comprises two locking holes arranged at the upper end of the movable mounting part away from the swing movable hole and respectively connected to two ends of the swing movable hole, the two locking holes are connected to each other, one end of the adjusting rod has a rod body movable part movably arranged in the swing movable hole and the adjusting rod movable hole, the rod body movable part is coaxially connected with a rod body locking part, the diameter of the rod body locking part is greater than that of the rod body movable part, the diameter of the rod body locking part matches the inner diameter of the locking hole, and the rod body rotating and axial moving structure is arranged between the adjusting rod and the swing seat, which can make the adjusting rod axially move when the adjusting rod is circumferentially rotated, so that the rod body locking part is inserted and positioned in any one of the locking holes. The two locking holes are fixed by the rod body locking part of the adjusting rod, the swing seat and the lifting movable seat are fixed, and the adjusting rod can be freely inserted into the corresponding locking hole according to the adjustment requirement.

[0010] In the above-mentioned self-adaptive multi-angle adjustable waist support, the rod body rotation axis movement structure comprises a rod body rotation part arranged at the end of the adjusting rod away from the movable part of the rod body, the rod body rotation part has a handle part at the end outside the swing seat, the other end of the rod body rotation part is arranged in the adjusting rod locking hole, the inner side of the adjusting rod locking hole has an arc-shaped movable groove, the bottom of the arc-shaped movable groove has two arc-shaped curved surfaces, the height of the arc-shaped curved surfaces gradually increases from the side to the middle of the arc-shaped movable groove, the end of the rod body rotation part away from the handle part has an arc-shaped block outside the circumferential side of the rod body locking part, the end of the arc-shaped block away from the rod body rotation part has an arc-shaped inclined surface matched with the arc-shaped curved surface, the rod body rotation part, the rod body locking part and the rod body movable part are integrated, and a rod body nut movably arranged in the adjusting rod movable hole is arranged at the end of the rod body movable part, the rod body nut corresponds to the annular limiting part on the inner side of the end of the adjusting rod movable hole close to the accommodating groove, and a rod body reset spring is arranged between the rod body nut and the annular limiting part. The mutual cooperation of the arc-shaped curved surface and the arc-shaped inclined surface enables the adjusting rod to axially move in the arc-shaped movable groove, and enables the rod body locking part to move out of or insert into the locking hole. The rod body reset spring is used to move the adjusting rod outward, and plays an auxiliary role. When the rod body locking part is inserted into the locking hole, the rod body movable part is connected with the rod body nut, so as to fix the adjusting rod.

[0011] In the above-mentioned self-adaptive multi-angle adjustable waist support, the up-down lifting self-circulation mechanism comprises a lifting fixed groove arranged in the lifting fixed seat, a lifting plate arranged in the lifting fixed groove, an activity seat guide plate arranged on the side of the lifting plate away from the chair back frame and fixed with the inside of the lifting fixed groove, a lifting activity seat movably arranged between the lifting plate and the activity seat guide plate through a track adjusting assembly, and a swing block arranged at the end of the lifting activity seat close to the lifting plate through an elastic reset assembly and matched with the track adjusting assembly.

[0012] In the above-mentioned self-adaptive multi-angle adjustable waist support, the track adjusting assembly comprises a track plate arranged on the side of the lifting plate close to the chair back frame, the track plate has an up-lifting channel on one side and a down-lifting channel on the other side, the up-lifting channel and the down-lifting channel are connected in series, the track plate has a plurality of tooth-shaped parts arranged in sequence from top to bottom and inclined upward on the side close to the up-lifting channel, the swing block has an adjusting shaft corresponding to the tooth-shaped part on the upper end, and the lower end of the swing block is movably connected with the lifting activity seat in a circumferential direction.

[0013] In the adaptive multi-angle adjustable lumbar support, the elastic reset component includes an elastic reset piece arranged at the lower end of the swing block, the lower end of the elastic reset piece is fixedly connected with the lifting movable seat, the inner side of the elastic reset piece is provided with a reset groove for placing the lower end of the swing block, the upper end of the elastic reset piece is provided with an opening communicated with the reset groove, the two sides of the elastic reset piece are respectively provided with reset strips in contact with the two sides of the middle part of the swing block, and the upper end of the lifting movable seat is provided with a manual lifting plate.

[0014] Compared with the prior art, the adaptive multi-angle adjustable lumbar support has the advantages that:

[0015] 1. The device adjusts the angle between the chair back frame and the lumbar support frame through the multi-gear locking mechanism, and the overall operation is simple and self-adaptive adjustment can be realized, so that the pressure borne by the waist can be accurately shared, the burden of the waist muscles can be effectively reduced, and the waist fatigue can be relieved.

[0016] 2. The device adopts the up-down lifting self-circulation mechanism and the multi-gear locking mechanism, can flexibly adjust the lumbar support frame to the most comfortable angle and supporting degree according to individual preferences and actual needs, perfectly fits the waist curve, and greatly improves the use comfort. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the utility model.

[0018] Figure 2 is an exploded view of the structure of the utility model.

[0019] Figure 3 is a structural schematic diagram of the lumbar support frame in the utility model.

[0020] Figure 4 is a structural sectional view of the swing seat in the utility model.

[0021] Figure 5 is a structural schematic diagram of the lifting movable seat in the utility model.

[0022] Figure 6 is a structural schematic diagram of the lifting movable seat in another view of the utility model.

[0023] Figure 7 is a structural schematic diagram of the adjusting rod in the utility model.

[0024] Figure 8 is a structural schematic diagram of the adjusting rod and the lifting movable seat in the utility model.

[0025] Figure 9It is the structural schematic view of the lifting plate in the utility model.

[0026] In the figure: chair back frame 1, lifting fixed seat 11, adjusting rod 12, waist support frame 2, swing seat 21, containing groove 22, up-down lifting self-circulation mechanism 3, lifting fixed groove 31, lifting plate 32, movable seat guide plate 33, swing block 34, lifting movable seat 4, movable mounting part 41, pin shaft 42, circumferential swing connecting structure 5, swing mounting hole 51, swing hinge hole 52, swing return spring 53, circumferential swing limiting assembly 54, swing movable hole 55, multi-gear locking mechanism 6, adjusting rod locking hole 61, adjusting rod movable hole 62, multi-gear locking assembly 63, locking hole 64, rod body movable part 65, rod body locking part 66, rod body rotation axial movement structure 7, rod body rotation part 71, handle part 72, arc movable groove 73, arc curved surface 74, arc block 75, arc inclined plane 76, annular limiting part 77, rod body return spring 78, track adjusting assembly 8, track plate 81, uplink channel 82, downlink channel 83, toothed part 84, adjusting shaft 85, elastic return assembly 9, elastic return piece 91, return groove 92, return strip 93, manual lifting plate 94. DETAILED DESCRIPTION

[0027] The utility model will be made further detailed explanation in combination with the specific embodiment and the drawing.

[0028] As Figures 1-9 Shown, a kind of adaptive multi-angle adjustable waist support, including chair back frame 1 and the movable setting in the waist support frame 2 of one side of chair back frame 1, lifting fixed seat 11 is installed in the side of chair back frame 1 close to waist support frame 2, lifting movable seat 4 is movably arranged on lifting fixed seat 11 by up-down lifting self-circulation mechanism 3, lifting movable seat 4 is movably connected with swing seat 21 on waist support frame 2 by circumferential swing connecting structure 5, and swing seat 21 and lifting movable seat 4 are equipped with adjusting rod 12 between, and swing seat 21 and lifting movable seat 4 are equipped with the multi-gear locking mechanism 6 between adjusting rod 12, when adjusting rod 12 is axially moved to position swing seat 21 and lifting movable seat 4 each other when adjusting rod 12 is circumferentially rotated by external force. By the cooperation of multi-gear locking mechanism 6 and adjusting rod 12, the mutual positioning of swing seat 21 and lifting movable seat 4 can be realized, so that the activity angle of waist support frame 2 can be freely adjusted according to the demand, the overall adjusting structure is simple, and the operation is convenient, time and energy are saved, and the overall applicability is improved by adjusting the lifting height of lifting movable seat 4 through up-down lifting self-circulation mechanism 3.

[0029] In combination Figure 2 , Figure 3 and Figure 5As shown, the swing seat 21 is arranged at one side of the lower end of the waist support frame 2, and the swing seat 21 is provided with a receiving groove 22 at the side close to the lifting movable seat 4, and the lifting movable seat 4 is provided with a movable mounting portion 41, and the movable mounting portion 41 is arranged in the receiving groove 22 through the swing of a pin shaft 42.

[0030] The circumferential swing connection structure 5 includes a swing mounting hole 51 arranged at the lower end of the swing seat 21 and penetrating the lower end of the receiving groove 22, the pin shaft 42 is arranged in the swing mounting hole 51, the lower end of the movable mounting portion 41 is provided with a swing hinged hole 52 for the pin shaft 42 to pass through, and the movable mounting portion 41 is hinged and connected with the pin shaft 42, and the swing reset spring 53 is arranged between the bottom of the receiving groove 22 and the movable mounting portion 41. The swing seat 21 is connected with the lifting movable seat 4 through the pin shaft 42, which can realize the circumferential swing of the waist support frame 2 around the swing seat 21, and the swing reset spring 53 can ensure the stability of the waist support frame 2 during adjustment.

[0031] Combining Figure 3 and Figure 5 As shown, the multi-gear locking mechanism 6 includes an adjusting rod locking hole 61 arranged at one side of the upper end of the swing seat 21 and an adjusting rod movable hole 62 arranged at the other side of the upper end of the swing seat 21, the adjusting rod locking hole 61 and the adjusting rod movable hole 62 correspond to each other and are communicated through the receiving groove 22, one end of the adjusting rod 12 is inserted into the adjusting rod locking hole 61 and extends into the adjusting rod movable hole 62 through the receiving groove 22, the circumferential swing limiting assembly 54 is arranged between the movable mounting portion 41 and the adjusting rod 12, and the multi-gear locking assembly 63 is arranged between the adjusting rod 12, the movable mounting portion 41 and the swing seat 21.

[0032] The circumferential swing limiting assembly 54 includes an arc-shaped swing movable hole 55 arranged at one side of the upper end of the movable mounting portion 41, the swing movable hole 55 is arranged circumferentially around the center of the pin shaft 42, and the adjusting rod 12 is movably arranged in the swing movable hole 55. The adjusting rod 12 is connected with the swing seat 21, and the adjusting rod 12 moves in the swing movable hole 55, so that the swing movable hole 55 is used to limit the adjustment range of the waist support frame 2.

[0033] Combining Figure 5 , Figure 7 and Figure 8As shown, the multi-gear locking assembly 63 is a double-gear locking assembly, and the multi-gear locking assembly 63 includes two locking holes 64 arranged on the upper end of the movable mounting portion 41 away from the swing movable hole 55 and respectively connected to both ends of the swing movable hole 55, the two locking holes 64 are connected to each other on the side, one end of the adjusting rod 12 has a rod body movable portion 65 movably arranged in the swing movable hole 55 and the adjusting rod movable hole 62 respectively, the rod body movable portion 65 is coaxially connected with a rod body locking portion 66, the diameter of the rod body locking portion 66 is larger than that of the rod body movable portion 65, and the diameter of the rod body locking portion 66 matches the inner diameter of the locking hole 64, and the rod body rotating axial movement structure 7 is arranged between the adjusting rod 12 and the swing seat 21, which can make the adjusting rod 12 axially move when the adjusting rod 12 is rotated by external force, so that the rod body locking portion 66 is inserted and positioned in any one of the locking holes 64. The two locking holes 64 fix the swing seat 21 and the lifting movable seat 4 through the rod body locking portion 66 of the adjusting rod 12, and the adjusting rod 12 can be freely inserted into the corresponding locking hole 64 according to the adjustment requirement.

[0034] As shown in Figure 2 , Figure 4 and Figure 7 , the rod body rotating axial movement structure 7 includes a rod body rotating portion 71 arranged at the end of the adjusting rod 12 away from the rod body movable portion 65, the rod body rotating portion 71 has a handle portion 72 on the outer side of the swing seat 21 at one end, and the other end of the rod body rotating portion 71 is arranged in the adjusting rod locking hole 61, the inner side of the adjusting rod locking hole 61 has an arc-shaped movable groove 73 in the circumferential direction, the bottom of the arc-shaped movable groove 73 has two arc-shaped curved surfaces 74, and the height of the arc-shaped curved surfaces 74 gradually increases from the side to the middle of the arc-shaped movable groove 73, the end of the rod body rotating portion 71 away from the handle portion 72 has an arc-shaped block 75 on the outer side of the rod body locking portion 66 in the circumferential direction, and the end of the arc-shaped block 75 away from the rod body rotating portion 71 has an arc-shaped inclined surface 76 matched with the arc-shaped curved surface 74, the rod body rotating portion 71, the rod body locking portion 66 and the rod body movable portion 65 are connected as an integrated structure, and a rod body nut movably arranged in the adjusting rod movable hole 62 is arranged at one end of the rod body movable portion 65, the rod body nut corresponds to an annular limiting portion 77 on the inner side of the end of the adjusting rod movable hole 62 close to the accommodating groove 22, and a rod body return spring 78 is arranged between the rod body nut and the annular limiting portion 77. The mutual cooperation of the arc-shaped curved surface 74 and the arc-shaped inclined surface 76 can make the adjusting rod 12 axially move in the arc-shaped movable groove 73, and can make the rod body locking portion 66 move out of or insert into the locking hole 64, the rod body return spring 78 is used to move the adjusting rod 12 outward, and plays an auxiliary role, when the rod body locking portion 66 is inserted into the locking hole 64, the rod body movable portion 66 is connected with the rod body nut, which plays a role of fixing the adjusting rod 12.

[0035] As shown in Figure 6 and Figure 9As shown, the up-down self-circulation mechanism 3 comprises a lifting fixed groove 31 arranged in the lifting fixed seat 11, and a lifting plate 32 arranged in the lifting fixed groove 31. The lifting plate 32 is provided with a movable seat guide plate 33 fixed to the inside of the lifting fixed groove 31 away from the chair back frame 1. The lifting movable seat 4 is movably arranged between the lifting plate 32 and the movable seat guide plate 33 through a track adjusting assembly 8, and the lifting movable seat 4 is provided with a swing block 34 matched with the track adjusting assembly 8 at one end close to the lifting plate 32 through an elastic reset assembly 9.

[0036] The track adjusting assembly 8 comprises a track plate 81 arranged at one side of the lifting plate 32 close to the chair back frame 1. The track plate 81 is provided with an uplink channel 82 at one side and a downlink channel 83 at the other side. The uplink channel 82 and the downlink channel 83 are connected in series at the head and tail. The track plate 81 is provided with a plurality of tooth-shaped parts 84 arranged in sequence from top to bottom and inclined upward at one side close to the uplink channel 82. The swing block 34 is provided with an adjusting shaft 85 corresponding to the tooth-shaped parts 84 at the upper end, and the lower end of the swing block 34 is movably connected with the lifting movable seat 4.

[0037] Specifically, the elastic reset assembly 9 comprises an elastic reset part 91 arranged at the lower end of the swing block 34. The lower end of the elastic reset part 91 is fixedly connected with the lifting movable seat 4. The inside of the elastic reset part 91 is provided with a reset groove 92 for placing the lower end of the swing block 34. The upper end of the elastic reset part 91 is provided with an opening communicated with the reset groove 92. The elastic reset part 91 is provided with reset strips 93 respectively contacting the two sides of the middle part of the swing block 34 at the two sides. The upper end of the lifting movable seat 4 is provided with a manual lifting plate 94. When the swing block 34 moves, the elastic reset part 91 can restore the swing block 34 to the initial state, which is conducive to the adjusting shaft 85 entering the tooth-shaped parts 84 and ensuring that the swing block 34 and the track plate 81 are fixed.

[0038] The principle of the embodiment is that:

[0039] The lifting movable seat 4 is connected with the swing seat 21 of the waist support frame 2 through a pin shaft 42. The lifting movable seat 4 moves upward along the length direction of the lifting plate 32 through the manual lifting plate 94. The swing block 34 on the lifting movable seat 4 corresponds to the track plate 81 on the lifting plate 32, so that the lifting height of the lifting movable seat 4 can be controlled, and the lifting height of the waist support frame 2 is controlled. The angle adjustment of the waist support frame 2 is realized through the adjusting rod 12 and the swing movable hole 55 between the swing seat 21 and the lifting movable seat 4. The angle fixation of the waist support frame 2 is realized through the adjusting rod 12 and the plurality of locking holes 64. The angle of the waist support frame 2 can be freely selected according to the demand to control the angle of the waist support frame 2, and the applicability is provided.

[0040] The specific embodiments described herein are merely illustrative of the present application. Various modifications or changes can be made to the specific embodiments described herein by those skilled in the art without departing from the spirit of the present application, or the scope of the appended claims.

[0041] Although the terms chair back frame 1, lifting fixed seat 11, adjusting rod 12, waist support frame 2, swing seat 21, containing groove 22, up-and-down lifting self-circulation mechanism 3, lifting fixed groove 31, lifting plate 32, movable seat guide plate 33, swing block 34, lifting movable seat 4, movable mounting part 41, pin shaft 42, circumferential swing connection structure 5, swing mounting hole 51, swing hinge hole 52, swing return spring 53, circumferential swing limiting assembly 54, swing movable hole 55, multi-gear locking mechanism 6, adjusting rod locking hole 61, adjusting rod movable hole 62, multi-gear locking assembly 63, locking hole 64, rod body movable part 65, rod body locking part 66, rod body rotation axial movement structure 7, rod body rotation part 71, handle part 72, arc-shaped movable groove 73, arc-shaped curved surface 74, arc-shaped block 75, arc-shaped inclined surface 76, annular limiting part 77, rod body return spring 78, track adjusting assembly 8, track plate 81, upward channel 82, downward channel 83, toothed part 84, adjusting shaft 85, elastic return assembly 9, elastic return piece 91, return groove 92, return strip 93, manual lifting plate 94 are used more frequently in the text, but the possibility of using other terms is not excluded. The use of these terms is merely to facilitate the description and explanation of the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A self-adapting multi-angle adjustable lumbar support, comprising a chair back frame (1) and a lumbar support frame (2) movably arranged on one side of the chair back frame (1), characterized in that, The chair back frame (1) is provided with a lifting fixing seat (11) on one side close to the waist support frame (2), the lifting fixing seat (11) is movably provided with a lifting movable seat (4) through an up-and-down lifting self-circulation mechanism (3), the lifting movable seat (4) is movably connected with a swing seat (21) on the waist support frame (2) through a circumferential swing connecting structure (5), an adjusting rod (12) is arranged between the swing seat (21) and the lifting movable seat (4), and a multi-gear locking mechanism (6) is arranged between the adjusting rod (12) and the swing seat (21) and the lifting movable seat (4), when the adjusting rod (12) is circumferentially rotated under external force, the adjusting rod (12) can be axially moved to position the swing seat (21) and the lifting movable seat (4) relative to each other.

2. The self-adapting multi-angle adjustable lumbar support according to claim 1, wherein, The swing seat (21) is arranged on one side of the lower end of the waist support frame (2), the swing seat (21) is provided with a containing groove (22) on one side close to the lifting movable seat (4), one side of the lifting movable seat (4) is provided with a movable mounting part (41), and the movable mounting part (41) is swingably arranged in the containing groove (22) through a pin shaft (42).

3. A self-adapting multi-angle adjustable lumbar support according to claim 2, wherein, The circumferential swing connecting structure (5) comprises a swing mounting hole (51) arranged transversely on the lower end of the swing seat (21) and penetrating the lower end of the containing groove (22), the pin shaft (42) is arranged in the swing mounting hole (51), the lower end of the movable mounting part (41) is provided with a swing hinged hole (52) through which the pin shaft (42) penetrates, and the movable mounting part (41) is hingedly connected with the pin shaft (42), and a swing reset spring (53) is arranged between the bottom of the containing groove (22) and the movable mounting part (41).

4. A self-adapting multi-angle adjustable lumbar support according to claim 2 or 3, characterized in that, The multi-gear locking mechanism (6) comprises an adjusting rod locking hole (61) arranged on one side of the upper end of the swing seat (21) and an adjusting rod movable hole (62) arranged on the other side of the upper end of the swing seat (21), the adjusting rod locking hole (61) and the adjusting rod movable hole (62) correspond to each other and are communicated through the containing groove (22), one end of the adjusting rod (12) penetrates the adjusting rod locking hole (61), penetrates the containing groove (22) and extends into the adjusting rod movable hole (62), a circumferential swing limiting assembly (54) is arranged between the movable mounting part (41) and the adjusting rod (12), and a multi-gear locking assembly (63) is arranged between the adjusting rod (12) and the movable mounting part (41) and the swing seat (21).

5. The self-adapting multi-angle adjustable lumbar support of claim 4, wherein, The circumferential swing limiting assembly (54) comprises a swing movable hole (55) arranged on one side of the upper end of the movable mounting part (41) and in an arc shape, the swing movable hole (55) is arranged in a circumferential distribution mode with the center of the pin shaft (42) as the center, and the adjusting rod (12) movably penetrates the swing movable hole (55).

6. The self-adapting multi-angle adjustable lumbar support of claim 5, wherein, The multi-gear locking assembly (63) is a double-gear locking assembly, and the multi-gear locking assembly (63) comprises two locking holes (64) which are arranged on the upper end of the movable mounting portion (41) away from the swing movable hole (55) and are respectively communicated with two ends of the swing movable hole (55), the two locking holes (64) are communicated with each other at the side portions, one end of the adjusting rod (12) is provided with a rod body movable portion (65) which is movably arranged in the swing movable hole (55) and the adjusting rod movable hole (62) respectively, the rod body movable portion (65) is coaxially connected with a rod body locking portion (66), the diameter of the rod body locking portion (66) is larger than that of the rod body movable portion (65), and the diameter of the rod body locking portion (66) is matched with the inner diameter of the locking hole (64), and the rod body rotating axial movement structure (7) is arranged between the adjusting rod (12) and the swing seat (21), and when the adjusting rod (12) is rotated in the circumferential direction under the action of external force, the adjusting rod (12) can be axially moved so that the rod body locking portion (66) is inserted and positioned in any one of the locking holes (64).

7. The self-adapting multi-angle adjustable lumbar support of claim 6, wherein, The rod body rotating axial movement structure (7) comprises a rod body rotating portion (71) which is arranged at one end of the adjusting rod (12) away from the rod body movable portion (65), one end of the rod body rotating portion (71) is provided with a handle portion (72) which is located outside the swing seat (21), the other end of the rod body rotating portion (71) is arranged in the adjusting rod locking hole (61), the circumferential inner side of the adjusting rod locking hole (61) is provided with an arc-shaped movable groove (73), the bottom of the arc-shaped movable groove (73) is provided with two arc-shaped curved surfaces (74), the height of the arc-shaped curved surfaces (74) gradually increases from the side portion to the middle portion of the arc-shaped movable groove (73), one end of the rod body rotating portion (71) away from the handle portion (72) is provided with an arc-shaped block (75) which is located on the circumferential outer side of the rod body locking portion (66), one end of the arc-shaped block (75) away from the rod body rotating portion (71) is provided with an arc-shaped inclined surface (76) which is matched with the arc-shaped curved surface (74), the rod body rotating portion (71), the rod body locking portion (66) and the rod body movable portion (65) are connected as an integrated structure, and a rod body nut which is movably arranged in the adjusting rod movable hole (62) is arranged at one end of the rod body movable portion (65), the rod body nut is matched with the annular limiting portion (77) which is arranged at one end of the adjusting rod movable hole (62) and is located on the inner side of the accommodating groove (22), and the rod body reset spring (78) is arranged between the rod body nut and the annular limiting portion (77).

8. The self-adapting multi-angle adjustable lumbar support of claim 1, wherein, The upper and lower lifting self-circulation mechanism (3) comprises a lifting fixed groove (31) arranged in a lifting fixed seat (11), a lifting plate (32) arranged in the lifting fixed groove (31), an activity seat guide plate (33) arranged on the side of the lifting plate (32) away from the chair back frame (1) and fixed in the lifting fixed groove (31), and a lifting activity seat (4) arranged between the lifting plate (32) and the activity seat guide plate (33) through a track adjusting assembly (8), and the lifting activity seat (4) is provided with a swing block (34) matched with the track adjusting assembly (8) on the end close to the lifting plate (32) through an elastic reset assembly (9).

9. The self-adapting multi-angle adjustable lumbar support of claim 8, wherein, The track adjusting assembly (8) comprises a track plate (81) arranged on the side of the lifting plate (32) close to the chair back frame (1), an ascending channel (82) arranged on one side of the track plate (81), a descending channel (83) arranged on the other side of the track plate (81), the ascending channel (82) and the descending channel (83) being connected in series, a plurality of tooth-shaped parts (84) arranged in series from top to bottom and inclined upward on the side of the track plate (81) close to the ascending channel (82), an adjusting shaft (85) arranged on the upper end of the swing block (34) and corresponding to the tooth-shaped parts (84), and the lower end of the swing block (34) being connected with the lifting activity seat (4) in a circumferential activity mode.

10. The self-adapting multi-angle adjustable lumbar support of claim 9, wherein, The elastic reset assembly (9) comprises an elastic reset part (91) arranged on the lower end of the swing block (34), the elastic reset part (91) being fixedly connected with the lifting activity seat (4) on the lower end, a reset groove (92) arranged on the inner side of the elastic reset part (91) and used for placing the lower end of the swing block (34), an opening arranged on the upper end of the elastic reset part (91) and communicated with the reset groove (92), reset strips (93) arranged on the two sides of the elastic reset part (91) and in contact with the two sides of the middle part of the swing block (34), and a manual lifting plate (94) arranged on the upper end of the lifting activity seat (4).

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