CN118161038A

CN118161038A - Ergonomic seat

Info

Publication number: CN118161038A
Application number: CN202410232155.1A
Authority: CN
Inventors: 程军
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2024-03-01
Filing date: 2024-03-01
Publication date: 2024-06-11

Abstract

The present invention provides an ergonomic chair comprising: a chair frame, on which a seat plate is arranged; the chair back comprises a main frame body and a plurality of groups of framework monomers; the main frame body is connected to the chair frame; the plurality of groups of framework monomers are connected in series along a preset direction to form a bionic spine frame for supporting the waist and the back of a human body; the head end of the bionic ridge frame is positioned at the top of the main frame body, and the tail end of the bionic ridge frame is positioned at the bottom of the main frame body; the plurality of groups of skeleton monomers are movably connected with each other, so that the angle of the bionic spinal frame for supporting the waist and the back of a human body is adjustable. According to the invention, the included angles among a plurality of groups of skeleton monomers can be adjusted according to the body types, the flexibility degree and the lumbar vertebra pathological changes of different users, the bionic spinal frame is adjusted to an optimal supporting angle, the bionic spinal frame is fitted with the back curve of the user to the greatest extent, and the personalized adaptation is realized, so that the lumbar vertebra disease prevention and correction function is realized for the lumbar vertebra accurate support of the user, and the universality is strong.

Description

Ergonomic seat

Technical Field

The invention relates to the technical field of seats, in particular to an ergonomic seat.

Background

The seat is a furniture with very wide application in daily life work, and generally comprises a base, a backrest, a supporting structure, armrests and other parts, when a user uses the seat, the user often depends on the base and the backrest to support the buttocks and the back of the user, the backrest structure of the traditional seat mostly adopts soft cotton, the seat has softness after being covered by leather sleeves, when the backrest structure is used, gaps exist between the waist of a human body and the backrest of the seat, the support of the seat on the waist is relatively weak, muscles and vertebrae on the waist and the back of the human body can bear the pressure of the weight on the upper part of the human body, and especially when a patient suffering from lumbar vertebra diseases uses the seat, the lumbar muscle strain and the pathological changes of the vertebrae are extremely easy to aggravate, and inconvenience is brought to the study, life and work of the patient.

To this, people begin to design the human seat who accords with human mechanics standard, through carrying out design adjustment to the seat back radian, strengthen the laminating degree of seat back and human, make user's back when the contact seat back, seat back can the butt support user's waist to play the effect of correcting position of sitting and prevention, adjunctive therapy lumbar vertebrae disease. However, current ergonomic chairs, the chair back all adopts holistic bionical backbone frame, and this backbone frame adopts soft material, and the range of adjustment is limited, can not adjust bionical backbone frame's angle by a wide margin in order to satisfy different sizes, different vertebra flexibility and pathological change degree user's demand to reduced the correction supporting effect of seat to the lumbar vertebrae and use comfort, the commonality is relatively poor.

Disclosure of Invention

The invention aims to provide an ergonomic chair which aims at overcoming the defects of the prior art.

In order to solve the technical problems, the invention is realized by the following technical scheme:

An ergonomic chair comprising: a chair frame, on which a seat plate is arranged; the chair back comprises a main frame body and a plurality of groups of framework monomers; the main frame body is connected to the chair frame; the plurality of groups of framework monomers are connected in series along a preset direction to form a bionic spine frame for supporting the waist and the back of a human body; the head end of the bionic ridge frame is positioned at the top of the main frame body, and the tail end of the bionic ridge frame is positioned at the bottom of the main frame body; the plurality of groups of skeleton monomers are movably connected with each other, so that the angle of the bionic spinal frame for supporting the waist and the back of a human body is adjustable.

Further, each group of skeleton monomers comprises a backrest body and a movable arm, one end of the movable arm is hinged with the backrest body and can swing relative to the normal direction of the backrest body, and one end of the movable arm, which is far away from the backrest body, is connected to the adjacent skeleton monomers or the main frame body.

Further, the movable arm comprises a connecting rod, one end of the connecting rod is connected with the adjacent framework monomer or the main frame body, the other end of the connecting rod is at least hinged with two groups of swing rods at intervals along the length direction of the connecting rod, the first swing rod and the second swing rod are respectively, and one ends of the first swing rod and the second swing rod, which are respectively far away from the connecting rod, are respectively hinged on the backrest body at intervals.

Further, one end of the swing rod hinged connecting rod extends outwards to form a grip for gripping adjustment.

Further, one end of the movable arm far away from the backrest body can be connected to the adjacent framework monomers in a transverse swinging way.

Further, the movable arm is kept away from the rotatable movable disk that is connected with of one end of leaning on the body, and the one end of movable disk is formed with movable connecting rod, and movable connecting rod is kept away from the one end of movable disk and is formed with the screw hole, is formed with the locating hole that is used for supplying movable connecting rod to rotate the location on the body of leaning on, but is equipped with the connecting screw of threaded connection screw hole in the locating hole.

Further, the top and the bottom of the main frame body are respectively provided with a transverse adjusting groove, and sliding blocks are slidably positioned in each group of transverse adjusting grooves; the sliding block positioned at the top of the main frame body is connected with a first connecting seat, a movable arm is arranged on the first connecting seat, one end of the movable arm on the first connecting seat is hinged on the first connecting seat, and the other end of the movable arm is connected with the head end of the bionic ridge frame; the sliding block positioned at the bottom of the main frame body is connected with a second connecting seat, and the second connecting seat is connected with the tail end of the bionic spine frame.

Further, the main frame body comprises a first frame body and a second frame body which is connected with the first frame body in a longitudinal telescopic manner, the head end of the bionic spine frame is positioned on the first frame body, and the tail end of the bionic spine frame is positioned on the second frame body.

Further, the two lateral ends of the backrest body extend outwards respectively to form supporting arms, and the tail ends of the supporting arms, which are far away from the backrest body, are connected with framework sheets.

Further, the chair back also comprises a leather sheath for wrapping the main frame body and the bionic spine frame, the leather sheath comprises a deformable supporting cotton sheath for contacting the waist and back of a human body and a shielding sleeve nested on the back of the main frame body, and a zipper assembly for opening and closing is arranged on the shielding sleeve.

Further, a supporting shaft is arranged on the chair frame, the bottom of the seat plate is connected with a supporting plate, a containing groove is formed between the seat plate and the supporting plate, the supporting shaft is transversely positioned in the containing groove, a positioning sleeve is arranged on the supporting shaft sleeve, and the positioning sleeve is connected with the containing groove through a bolt to radially lock or unlock the supporting shaft.

Further, the bottom of the chair frame is provided with a leg support bracket, the leg support bracket is provided with a leg supporting plate, one end of the leg support bracket is rotatably connected with the chair frame and can swing back and forth relative to the chair frame, the chair frame is provided with a guide sleeve, a driving rod is connected in a sliding manner in the guide sleeve, and one end of the driving rod extends out of the guide sleeve and is connected to the leg support bracket.

Compared with the prior art, the invention has the beneficial effects that the included angles among a plurality of groups of framework monomers can be adjusted according to the body types, the spinal flexibility and the lumbar pathological changes of different users, the bionic spinal frame is adjusted to the optimal supporting angle, the back curve of the user is fitted to the maximum extent, the personalized adaptation is realized, the lumbar of the user is accurately supported, the lumbar pathological changes can be prevented and corrected, and the universality is strong.

Drawings

FIG. 1 is a schematic perspective view of an ergonomic chair according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of an ergonomic chair with a seat back unattached to a holster;

FIG. 3 is a schematic structural view of a bionic spine frame;

FIG. 4 is a schematic structural diagram of a backbone monomer;

FIG. 5 is a second perspective view of an ergonomic chair according to an embodiment of the present invention;

FIG. 6 is an enlarged view at A in FIG. 5;

In the figure:

Reference numerals: 1. a chair frame; 11. a support shaft; 12. a leg rest bracket; 13. a leg rest; 14. a guide sleeve; 15. a driving rod; 2. a seat plate; 21. a support plate; 22. a receiving groove; 23. a positioning sleeve; 3. a main frame body; 31. a transverse adjustment groove; 32. a sliding block; 33. a first connection base; 34. a second connecting seat; 35. a connecting sleeve; 36. positioning columns; 37. a first frame body; 38. a second frame body; 4. a bionic spine frame; 5. leather sheath; 51. supporting the cotton sleeve; 52. a shielding sleeve; 53. a zipper assembly; 6. a backbone monomer; 61. a backrest body; 62. a support arm; 63. a skeleton sheet; 64. a movable arm; 641. a connecting rod; 642. a first swing rod; 643. the second swing rod; 644. a grip; 65. a movable plate; 66. a movable connecting rod; 67. positioning holes; 68. a connecting screw; 7. a chair back.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The invention is described in further detail below with reference to the accompanying drawings: the specific implementation mode of the invention is as follows:

As shown in fig. 1 and 2, an ergonomic chair comprises a chair frame 1, wherein a seat plate 2 and a chair back 7 are arranged on the chair frame 1, the chair back 7 comprises a main frame body 3, a bionic spine frame 4 and a leather sheath 5, the leather sheath 5 is sheathed outside the main frame body 3 and the bionic spine frame 4, the main frame body 3 is connected to the chair frame 1, and the bionic spine frame 4 is longitudinally positioned on the main frame body 3. When the bionic hip support is used, the seat plate 2 is used for supporting the hip and part of the thigh of a human body, the bionic support frame is used for supporting the waist and the back of the human body, and the leather sheath 5 is used for isolating the main frame body 3 and the bionic spine frame 4 from the back so as to realize indirect contact.

Referring to fig. 2-4, the invention is improved in that the bionic spine frame 4 comprises a plurality of groups of skeleton monomers 6, the skeleton monomers 6 are connected in series along a preset direction to form the bionic spine frame 4, and the skeleton monomers 6 are movably connected with each other. Through above-mentioned technical scheme, during operation, can be according to different user's size, vertebra flexibility ratio and lumbar vertebrae pathological change condition, adjust the contained angle between a plurality of group skeleton monomer 6, adjust bionical spine frame 4 to best supporting angle, the back curve of the user of the biggest laminating realizes individualized adaptation to the accurate support of waist to the user plays prevention, corrects the effect of lumbar vertebrae disease, and the commonality is strong.

The following describes the specific composition and connection modes of the bionic spine frame 4 and the skeleton monomer 6: each group of skeleton monomers 6 comprises a backrest body 61, the two transverse ends of the backrest body 61 extend outwards respectively to form supporting arms 62, the front faces of the tail ends of the supporting arms 62 far away from the backrest body 61 are provided with skeleton pieces 63, when a user sits on the chair and leans against the chair back 7, the supporting faces of the backrest body 61 are abutted against the vertebrae of the waist of the user, and the supporting faces of the two groups of skeleton pieces 63 are abutted against the two side waist parts of the human body respectively, so that independent support of key positions of the waist parts is realized, and the supporting experience of the waist parts of the user can be effectively improved. In addition, a soft cushion block is arranged at the contact part of the framework piece 63 and the leather sheath 5, and provides soft support when the chair back 7 supports the back of a human body, so that the softness of the bionic spine frame 4 is improved, and the riding comfort of the chair is improved.

The implementation structure of movable interconnect of a plurality of group skeleton monomer 6 has the variety, for example accessible bolt, fastener such as screw are connected each other between the skeleton monomer 6, and during the use, according to user's physique and backbone condition, can loosen fastener such as bolt, screw, the back locking fastener is adjusted to target angle to skeleton monomer 6 to realize the purpose of the bionical spine frame 4 supporting angle of adjustment, but this implementation structure is comparatively troublesome, need take time and energy to the fastener elasticity many times, and the flexibility and the inefficiency of adjustment are lower.

In this regard, the present embodiment provides a preferred embodiment structure in which the backbone monomers 6 are movably connected to each other: the frame unit 6 further includes a movable arm 64, one end of the movable arm 64 is hinged to the back surface of the backrest 61 and can swing relative to the normal direction of the backrest 61 (in human engineering, the normal direction generally refers to a direction perpendicular to a surface, and in this context, the normal direction refers to a perpendicular relationship between the surface of the backrest 61 and the lumbar of a human body), one end of the movable arm 64 away from the backrest 61 is connected to the backrest 61 of an adjacent frame unit 6 or to the main frame 3, in this embodiment, the movable arms 64 of each group of frame units 6 are respectively connected to the backrest 61 of the frame unit 6 located adjacent below, and the movable arm 64 of the frame unit 6 located at the extreme end of the bionic spine frame 4 is connected to the main frame 3. When the bionic spine frame is used, a user can manually act on the skeleton monomers 6 according to factors such as body types and lumbar curvatures, the back rest body 61 or the movable arm 64 overcomes friction damping of the hinges to swing, the front and back angles among the skeleton monomers 6 are adjusted, the bionic spine frame 4 presents a front and back support shape which is most suitable for the waist and back of the user, and due to the fact that the hinges are damped, after the back rest body 61 and the movable arm 64 rotate to a required angle, the support rigidity of the whole bionic spine frame 4 is guaranteed through the friction damping existing in the hinges, and the bionic spine frame can be continuously attached to the waist and back of the user without deformation in the actual use process.

The following describes the specific structure and connection of the movable arm 64: referring to fig. 3 and 4, the movable arm 64 includes a connecting rod 641, one end of the connecting rod 641 is used for connecting adjacent frame monomers 6 or main frame bodies 3, the other end of the connecting rod 641 is hinged with two groups of swing rods at intervals along the length direction of the connecting rod, the two groups of swing rods are respectively a first swing rod 642 and a second swing rod 643, one ends of the first swing rod 642 and the second swing rod 643, far away from the connecting rod 641, are respectively hinged on the backrest body 61 at intervals, and the first swing rod 642 is positioned above the second swing rod 643. In this embodiment, the movable arm 64 is respectively hinged to the backrest 61 and the connecting rod 641 through the two ends of the first swing link 642 and the second swing link 643, so as to form a multi-link structure, so that a wider angle adjustment can be realized, the multi-link structure can better adapt to the body types and sitting postures of different users, and can provide multi-point support, so that the overall stability of the bionic spine frame 4 is increased. It should be noted that, in order to enhance the stability of the bionic spine frame 4, the number of the swing rods may be greater than two.

In order to improve the adjustment efficiency and the control precision, the end of the first swinging rod 642 hinged with the connecting rod 641 extends outwards to form a grip 644, and when in use, a user can drive the framework monomer 6 to swing back and forth by grasping the grip 644 to adjust the support shape of the bionic spine frame 4.

For making the angular adjustment of bionical backbone frame 4 more nimble, in this embodiment, but the one end lateral oscillation's of back body 61 is kept away from to the movable arm 64 is connected on adjacent skeleton monomer 6, and during the use, accessible lateral oscillation skeleton monomer 6, bionical backbone frame 4's lateral deviation angle adjusts, makes bionical backbone frame 4 take place the side bend to satisfy the gesture demand of the lateral waist of turning of user, and can cooperate the correction adjunctive therapy of scoliosis patient.

Specifically, the movable arm 64 is rotatably connected with the movable disk 65 far away from one end of the backrest body 61, one end of the movable disk 65 is provided with a movable connecting rod 66, one end of the movable connecting rod 66 far away from the movable disk 65 is provided with a threaded hole, the backrest body 61 is provided with a positioning hole 67 for the movable connecting rod 66 to rotate and position, and a connecting screw 68 which is in threaded connection with the threaded hole is arranged in the positioning hole 67. When the transverse bending radian of the bionic spine frame 4 needs to be adjusted, the movable disc 65 can be reversely rotated, so that the threaded holes on the movable connecting rods 66 are separated from the connecting screws 68 in the positioning holes 67, and as the movable connecting rods 66 are rotationally positioned in the positioning holes 67, after the connecting screws 68 are loosened, the skeleton monomers 6 can mutually swing and cannot be separated from each other, after the skeleton monomers 6 transversely swing to the target position, the movable disc 65 is rotated, so that the connecting screws 68 are screwed into the threaded holes, and the bionic spine frame 4 can be locked again.

Referring to fig. 2 to 4, in order to further increase the adjustment range of the transverse angle of the bionic spine frame 4, in this embodiment, the top and bottom of the main frame 3 are respectively provided with a transverse adjustment groove 31, and a sliding block 32 is slidably positioned in each group of transverse adjustment grooves 31; the sliding block 32 positioned at the top of the main frame body 3 is connected with a first connecting seat 33, a movable arm 64 is arranged on the first connecting seat 33, one end of the movable arm 64 on the first connecting seat 33 is hinged on the first connecting seat 33, and the other end of the movable arm 64 is connected with the head end of the bionic ridge frame 4; the sliding block 32 positioned at the bottom of the main frame body 3 is connected with a second connecting seat 34, and the second connecting seat 34 is connected with the tail end of the bionic ridge frame 4. When the bionic spine frame is used, the sliding blocks 32 in the transverse adjusting grooves 31 at the top and/or the bottom of the main frame body 3 can be slid, the transverse positions of the upper end and the lower end of the bionic spine frame 4 can be flexibly adjusted, the bionic spine frame 4 can be more attached to the waist and back shape of a user, and preferably, after the sliding blocks 32 slide to the required positions, the sliding blocks 32 can be lowered and fixed through bolts, so that the sliding blocks 32 are prevented from being transversely deflected.

Specifically, the first connecting seat 33 and the second connecting seat 34 are detachable connecting structures, the first connecting seat 33 and the second connecting seat 34 both comprise a connecting sleeve 35 and a positioning column 36 capable of being matched with the connecting sleeve 35, the positioning column 36 of the first connecting seat 33 is connected to the sliding block 32 at the top of the main frame body 3, a movable arm 64 is arranged on the connecting sleeve 35 of the first connecting seat 33, one end of the movable arm 64 on the connecting sleeve 35 is hinged to the first connecting seat 33, and the other end of the movable arm 64 is connected with the top end of the backrest 61 of the first skeleton monomer 6 of the bionic ridge frame 4; the connecting sleeve 35 of the second connecting seat 34 is connected to the sliding block 32 at the bottom of the main frame body 3, and the positioning column 36 of the second connecting seat 34 is connected to the movable arm 64 of the last group of framework monomers 6 of the bionic spine frame 4. Through the scheme, as the first connecting seat 33 and the second connecting seat 34 are formed by the connecting sleeve 35 and the positioning column 36 in a detachable and inserting manner, when the bionic spine frame 4 can be horizontally assembled and then is integrally and longitudinally arranged on the main frame body 3, so that the seat is more convenient and simpler to install.

In this embodiment, the main frame 3 includes a first frame 37 and a second frame 38 that is connected to the first frame 37 in a longitudinally telescopic manner, where the head end of the bionic spine frame 4 is positioned on the first frame 37, and the tail end of the bionic spine frame 4 is positioned on the second frame 38. When the bionic spine frame is used, the whole height of the main frame body 3 can be stretched or shortened according to different heights of users, so that the waist and the back of the users can be better attached to the bionic spine frame 4, and the supporting experience and the back protection effect are improved. Specifically, the first frame 37 is formed with a telescopic hole, the second frame 38 is provided with a telescopic rod in sliding connection with the telescopic hole, and after the telescopic rod slides to a required position, the telescopic rod can be longitudinally limited by fasteners such as bolts, so that the telescopic rod is prevented from continuously moving, and the main frame 3 is kept at a target height.

Referring to fig. 1 and 5, the leather sheath 5 includes a deformable supporting cotton sheath 51 for contacting the waist and back of the human body, and a shielding sheath 52 nested on the back of the main frame 3, and a zipper assembly 53 for opening and closing is provided on the shielding sheath 52. The supporting cotton sleeve 51 is formed by mixing deformable fibers and cotton materials, has certain tensile resistance, is not easy to break, is partially connected with the bionic spine frame 4, is partially connected with the main frame body 3, and is convenient to adapt, and deformation and break of the leather sleeve 5 are prevented because the length of the main frame body 3 changes, the whole structure of the bionic spine frame 4 changes, and the supporting cotton sleeve 51 can be deformed according to the shape of the bionic spine frame 4 and the length stretching of the main frame body 3. The shielding sleeve 52 is provided with a zipper assembly 53, and when the overall structure of the bionic spine frame 4 needs to be adjusted, the zipper assembly 53 can be opened to adjust the bionic spine frame 4.

Referring to fig. 1, 5 and 6, in order to further improve the comfort of the seat and enhance the linkage between the bionic spine frame 4 and the seat 2, the seat 2 adopts a rotatable connection mode, specifically: the chair frame 1 is provided with a support shaft 11, the bottom of the seat 2 is connected with a support plate 21, a containing groove 22 is formed between the seat 2 and the support plate 21, the support shaft 11 is transversely positioned in the containing groove 22, the support shaft 11 is sleeved with a positioning sleeve 23, and the positioning sleeve 23 is connected with the containing groove 22 through bolts to radially lock or unlock the support shaft 11. Through the technical scheme, when the seat cover is used, the bolt can be screwed first to enable the positioning sleeve 23 to loosen the supporting shaft 11, so that the seat cover 2 can longitudinally swing relative to the supporting shaft 11, and after the seat cover is adjusted, the bolt is locked, and the seat cover 2 keeps the angle for people to sit down. In this embodiment, the support plate 21 is detachably attached to the seat plate 2 by a fastener.

The bottom of the chair frame 1 is provided with a leg support bracket 12, the leg support bracket 12 is provided with a leg supporting plate 13, the leg supporting plate 13 is used for supporting legs, one end of the leg support bracket 12 is rotatably connected with the chair frame 1 and can swing back and forth relative to the chair frame 1, the chair frame 1 is provided with a guide sleeve 14, a driving rod 15 is connected in a sliding manner in the guide sleeve 14, and one end of the driving rod 15 extends out of the guide sleeve 14 to be connected to the leg support bracket 12. The driving rod 15 is driven to transversely move relative to the guide sleeve 14, so that the leg support bracket 12 swings relative to the chair frame 1, and the leg support plate 13 is subjected to angle adjustment, so that the leg support plate can reasonably adapt and support legs of people with different height and body types, thereby achieving better knee-pad effect and improving the comfort level of a user when leaning against.

The above embodiments are merely examples of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present invention are included in the scope of the present invention.

Claims

1. An ergonomic chair, characterized by: comprising the following steps:

A chair frame (1) on which a seat plate (2) is arranged;

the chair back (7) comprises a main frame body (3) and a plurality of groups of framework monomers (6);

the main frame body (3) is connected to the chair frame (1);

A plurality of groups of framework monomers (6) are connected in series along a preset direction to form a bionic spine frame (4) for supporting the waist and the back of a human body;

The head end of the bionic spine frame (4) is positioned at the top of the main frame body (3), and the tail end of the bionic spine frame is positioned at the bottom of the main frame body (3); the plurality of groups of framework monomers (6) are movably connected with each other, so that the angle of the bionic spine frame (4) for supporting the waist and back of the human body is adjustable.

2. An ergonomic chair according to claim 1, wherein: each group of framework monomers (6) comprises a backrest body (61) and a movable arm (64), one end of the movable arm (64) is hinged with the backrest body (61) and can swing relative to the normal direction of the backrest body (61), and one end of the movable arm (64) far away from the backrest body (61) is connected to the adjacent framework monomers (6) or the main frame body (3).

3. An ergonomic chair according to claim 2, wherein: the movable arm (64) comprises a connecting rod (641), one end of the connecting rod (641) is connected with an adjacent framework monomer (6) or a main frame body (3), the other end of the connecting rod (641) is at least hinged with two groups of swing rods at intervals along the length direction of the connecting rod, the swing rods are respectively a first swing rod (642) and a second swing rod (643), and one ends, far away from the connecting rod (641), of the first swing rod (642) and the second swing rod (643) are respectively hinged on the backrest body (61) at intervals.

4. An ergonomic chair according to claim 3 wherein: one end of the swing rod hinged connecting rod (641) extends outwards to form a handle (644) for grasping and adjusting.

5. An ergonomic chair according to claim 2, wherein: one end of the movable arm (64) far away from the backrest body (61) can be connected to the adjacent framework monomers (6) in a transverse swinging mode.

6. The ergonomic chair of claim 5 wherein: the movable arm (64) is far away from one end of the backrest body (61) and is rotatably connected with a movable disc (65), one end of the movable disc (65) is provided with a movable connecting rod (66), one end of the movable connecting rod (66) far away from the movable disc (65) is provided with a threaded hole, the backrest body (61) is provided with a positioning hole (67) for the movable connecting rod (66) to rotate and position, and a connecting screw (68) which can be connected with the threaded hole in a threaded mode is arranged in the positioning hole (67).

7. An ergonomic chair according to claim 2, wherein: the top and the bottom of the main frame body (3) are respectively provided with a transverse adjusting groove (31), and a sliding block (32) is slidably positioned in the transverse adjusting groove (31); the sliding block (32) positioned at the top of the main frame body (3) is connected with a first connecting seat (33), the movable arm (64) is arranged on the first connecting seat (33), one end of the movable arm (64) on the first connecting seat (33) is hinged on the first connecting seat (33), and the other end of the movable arm is connected with the head end of the bionic spine frame (4); the sliding block (32) positioned at the bottom of the main frame body (3) is connected with a second connecting seat (34), and the second connecting seat (34) is connected with the tail end of the bionic spine frame (4).

8. An ergonomic chair according to any of claims 2-7, wherein: the two transverse ends of the backrest body (61) are respectively and outwards extended to form supporting arms (62), and the tail ends of the supporting arms (62) far away from the backrest body (61) are connected with skeleton sheets (63).

9. An ergonomic chair according to claim 1, wherein: the main frame body (3) comprises a first frame body (37) and a second frame body (38) which is longitudinally connected with the first frame body (37) in a telescopic mode, the head end of the bionic spine frame (4) is positioned on the first frame body (37), and the tail end of the bionic spine frame (4) is positioned on the second frame body (38).

10. An ergonomic chair according to claim 1, wherein: the chair back (7) further comprises a leather sheath (5) wrapping the main frame body (3) and the bionic spine frame (4), the leather sheath (5) comprises a supporting cotton sheath (51) which is used for enabling the waist and the back of a human body to be contacted and can be deformed, a shielding sheath (52) which is nested on the back of the main frame body (3), and a zipper assembly (53) used for opening and closing is arranged on the shielding sheath (52).

11. An ergonomic chair according to claim 1, wherein: be equipped with back shaft (11) on chair frame (1), seat (2) bottom is connected with backup pad (21), be formed with accommodation groove (22) between seat (2) and backup pad (21), back shaft (11) transversely fix a position in accommodation groove (22), back shaft (11) cover is equipped with spacer sleeve (23), spacer sleeve (23) are through bolted connection accommodation groove (22) radial locking or loosen back shaft (11).

12. An ergonomic chair according to claim 1, wherein: the bottom of chair frame (1) is equipped with leg support (12), be equipped with leg layer board (13) on leg support (12), leg support (12) one end rotatable connect chair frame (1) and can be relative chair frame (1) carries out back-and-forth swinging, be equipped with guide sleeve (14) on chair frame (1), sliding connection has actuating lever (15) in guide sleeve (14), actuating lever (15) one end stretches out guide sleeve (14) are connected on leg support (12).