Self-adaptive adjustment ergonomic office chair

Abstract

The invention is applicable to the field of office chairs, and provides a self-adaptive adjustment ergonomic office chair which comprises a self-adaptive adjustment pad, the self-adaptive adjustment pad comprises a self-adaptive adjustment plate assembly, and the self-adaptive adjustment plate assembly comprises a plurality of unit self-adaptive adjustment parts; the unit self-adaptive adjusting part comprises a self-adaptive adjusting body, the self-adaptive adjusting body comprises an adjusting rod body and an abutting plate, and the abutting plate is arranged at the end of the adjusting rod body; an angle self-adaptive head is arranged at the end part of the adjusting rod body; a plurality of self-adaptive adjusting pads can adaptively adjust a plurality of unit self-adaptive adjusting parts at one local part or a plurality of local parts along with the curve of a human body, and the unit self-adaptive adjusting parts drive the abutting plate to adapt to different parts of the human body through stretching and retracting of the adjusting rod bodies on the self-adaptive adjusting bodies; self-adaptive multi-angle adjustment is carried out through an angle self-adaptive head in cooperation with an abutting plate, curve changes of the body are adapted, and finer body parts can be adjusted on the basis that overall partition adjustment is carried out.

Description

Technical Field

[0001] The present invention relates to the field of office chairs, in particular to an adaptively adjustable ergonomic office chair. Background Art

[0002] Ergonomic chairs are important tools that provide personalized support, reduce body pressure, and promote healthy sitting posture for people who sit for long periods of time through scientific design and rich adjustment functions; lumbar support, seat depth adjustment, tilt function, and armrest adjustment are its core elements.

[0003] The ergonomic design primarily utilizes elastic, eco-friendly materials such as mesh, eco-friendly fabric, and high-quality memory foam for the seat and backrest. Its craftsmanship and design are highly adaptable to future furniture trends. It offers excellent ventilation and heat dissipation, ensuring comfort and health, while preventing bacteria from growing during use. It also reduces pressure on the buttocks and back, presses stress-bearing acupuncture points, promotes blood circulation in the buttocks and back, and prevents strain on the neck, shoulders, and waist, maintaining a healthy physique.

[0004] Existing ergonomic chairs are divided into areas for overall adjustment, such as the back, waist and legs. However, this will make it impossible to adjust more detailed body parts. Summary of the Invention

[0005] (1) Technical problems solved The purpose of the embodiments of the present invention is to provide an adaptively adjustable ergonomic office chair, which aims to solve the problem that existing ergonomic chairs are divided into areas for overall adjustment, such as the back, waist and legs, which are divided into areas for overall adjustment; however, this will result in the inability to adjust more detailed body parts.

[0006] (2) Technical solution Specifically: The adaptively adjustable ergonomic office chair comprises an ergonomic chair frame, a plurality of adaptive adjustment pads are laid on the ergonomic chair frame, and the plurality of adaptive adjustment pads are arranged in an array along the main body of the ergonomic chair frame; the ergonomic chair frame comprises a headrest, a backrest and a seat panel, the headrest is assembled on the backrest, and the backrest is assembled on the seat panel; a backrest cushion is laid on the backrest, and a seat panel pad is laid on the seat panel; a plurality of adaptive adjustment pads are laid inside the backrest cushion and the seat panel pad; the adaptive adjustment pad comprises an adaptive adjustment plate assembly, and a soft cushion laid on the adaptive adjustment plate assembly; the adaptive adjustment plate assembly comprises a support plate, and a plurality of unit adaptive adjustment parts elastically interspersed on the support plate; the support plate is fixed inside the backrest cushion and / or the seat panel pad; the unit adaptive adjustment part comprises an adaptive adjustment body, the adaptive adjustment body comprises an adjustment rod body and a support plate, the support plate is arranged at the end of the adjustment rod body, and the support plate is used to support the body; the adjustment rod body is adjusted by The support plate is driven by telescopic movement to adapt to different parts of the body; the adjusting rod is provided with an angle adaptive head at its end, and the angle adaptive head is assembled on the support plate, and the support plate is adaptively adjusted to multiple angles through the angle adaptive head to adapt to changes in the curve of the body; after a person sits on the ergonomic chair frame, the ergonomic chair frame supports the human body through the headrest, backrest and seat board. During this process, the backrest and seat board will be in direct contact with the human body through the backrest cushion and seat board pad; several adaptive adjustment pads in the backrest cushion and seat board pad will follow the curve of the human body to adaptively adjust multiple or multiple unit adaptive adjustment parts in one local area. The unit adaptive adjustment part drives the support plate to adapt to different parts of the body through the telescopic adjustment rod on the adaptive adjustment body, and then cooperates with the support plate to perform adaptive multi-angle adjustment through the angle adaptive head to adapt to changes in the curve of the body, so as to achieve adjustment of more detailed body parts on the basis of adjustment of the overall partition.

[0007] The technical solution of this application is further described below: In one embodiment, the adjustment rod body includes an electric telescopic rod, and the angle adaptive head is assembled at the end of the electric telescopic rod; the electric telescopic rod is movably inserted in the elastic support plate.

[0008] Furthermore, the electric telescopic rod is externally secured with a fixed disk, to which are connected multiple springs A arranged in a circular array along the disk. The springs A are arranged parallel to the electric telescopic rod, and the ends of the springs A facing away from the disk are connected to a support plate. When the adjusting rod is squeezed, the electric telescopic rod can pass straight through the support plate, thereby extending the springs A. A limit ring is fixed to the electric telescopic rod above the support plate to prevent excessive stretching of the springs A.

[0009] Furthermore, the angle-adaptive head includes a tray, which is fixed to the end of an electric telescopic rod. A support column is fixed to the end of the tray, away from the rod. A hinged ball is fixed to the end of the support column, which is hinged to a support plate. The support plate has a ball-jointing cavity that cooperates with the hinged ball. The tray is connected to multiple springs B, which are arranged in a circular array around the support column and along the main body of the tray. The end of the springs B, away from the tray, is connected to the support plate. When a person sits, the chair frame transmits support force through the headrest, backrest, and seat panel, with the backrest and seat panel cushions directly contacting the person. This contact triggers the unit adaptive adjustment element, driving the electric telescopic rod through the support plate and stretching spring A. This, in turn, forces the support plate to conform to the body's concavity. Simultaneously, when the support plate is compressed, the hinged ball rotates in multiple directions, coordinating with the spring B to adjust the angles. The angle-adaptive head achieves multi-angle adjustment, ultimately forming a curved, adaptive concavity, achieving millimeter-level precision adaptation from zoned support to localized muscle groups.

[0010] In one embodiment, a flexible piezoelectric sensor array is embedded in the surface of the abutment plate. The flexible piezoelectric sensor array is used to collect pressure distribution / muscle tremor frequency in real time and determine the fatigue of the lumbar erector spinae muscles through microcurrent electromyography detection.

[0011] In one embodiment, the seat is assembled on a supporting chassis, which includes a steel five-star foot and a four-stage gas pressure rod.

[0012] (3) Beneficial effects Compared with the prior art, the self-adaptive ergonomic office chair of the present invention can achieve the following: 1. After a person sits on the ergonomic chair frame, the ergonomic chair frame supports the human body through the headrest, backrest and seat panel. During this process, the backrest and seat panel will directly contact the human body through the backrest cushion and seat panel pad. Several adaptive adjustment pads in the backrest cushion and seat panel pad will follow the curve of the human body to adaptively adjust multiple local or multiple local unit adaptive adjustment parts. The unit adaptive adjustment part drives the support plate to adapt to different parts of the body through the expansion and contraction of the adjustment rod on the adaptive adjustment body. The support plate then cooperates with the angle adaptive head to perform adaptive multi-angle adjustment to adapt to changes in the body curve, realizing the adjustment of finer body parts on the basis of overall partition adjustment. 2. The flexible piezoelectric sensor array collects pressure distribution / muscle tremor frequency in real time and determines the fatigue of the lumbar erector spinae muscles through microcurrent electromyography. When continuous unilateral muscle tension is detected (sitting tilt), the electric telescopic rod is automatically controlled to extend 5-8 mm on the weak side, and the spring B is shortened to form a corrective thrust to dynamically balance the force on the spine; the electric telescopic rod adjusts itself through its own expansion and contraction, and the unit adaptive adjustment part can massage the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 Schematic diagram of the structure of an adaptively adjustable ergonomic office chair in one embodiment of the present invention; Figure 2 Schematic diagram of the structure of an adaptive adjustment pad in one embodiment of the present invention; Figure 3 Schematic diagram of the structure of an adaptive adjustment plate assembly in one embodiment of the present invention; Figure 4 Schematic diagram of the structure of a unit adaptive adjustment member in one embodiment of the present invention; Figure 5 for Figure 4 Schematic diagram of the structure after the middle unit adaptive adjustment part is flipped; Figure 6 Schematic diagram of the structure of an adaptive regulator in one embodiment of the present invention; Figure 7 Schematic diagram of the structure of the adjusting rod body in one embodiment of the present invention; Figure 8 Schematic diagram of the structure of an electric telescopic rod in one embodiment of the present invention; Figure 9 A schematic structural diagram of an angle adaptive head according to an embodiment of the present invention; Figure 10 Schematic diagram of the assembly structure of the abutment plate and the angle adaptive head in one embodiment of the present invention; Figure 11 This is a demonstration diagram of the arc-shaped adaptive adaptation of the adaptive adjustment plate assembly to the human body in one embodiment of the present invention.

[0014] In the accompanying drawings: 1-headrest, 2-backrest, 3-seat panel, 4-support chassis, 5-backrest cushion, 6-seat panel pad, 7-cushion, 8-adaptive adjustment plate assembly, 9-arc-shaped adaptive recessed area; 81-support plate, 82-unit adaptive adjustment part, 83-fixed plate, 84-spring A, 85-limiting ring, 86-adaptive adjustment body; 861-rest plate, 862-adjustment rod body, 863-electric telescopic rod, 864-angle adaptive head; 8641-support column, 8642-drag plate, 8643-spring B, 8644-hinged ball. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. The specific implementation of the present invention is described in detail below with reference to the specific embodiments.

[0016] In the embodiment of the present invention, please refer to Figure 1 : An adaptively adjustable ergonomic office chair, comprising an ergonomic chair frame, a plurality of adaptively adjustable pads being laid on the ergonomic chair frame, and the plurality of adaptively adjustable pads being arranged in an array along the main body of the ergonomic chair frame; The ergonomic chair frame needs additional explanation: the ergonomic chair frame includes a headrest 1, a backrest 2 and a seat panel 3. The headrest 1 is assembled on the backrest 2, and the backrest 2 is assembled on the seat panel 3. A backrest cushion 5 is laid on the backrest 2, and a seat panel pad 6 is laid on the seat panel 3. Several adaptive adjustment pads are laid inside the backrest cushion 5 and the seat panel pad 6. Therefore, after a person sits on the ergonomic chair frame, the ergonomic chair frame supports the human body through the headrest 1, backrest 2 and seat board 3. During this process, the backrest 2 and seat board 3 will directly contact the human body through the backrest cushion 5 and seat board pad 6. Several adaptive adjustment pads in the backrest cushion 5 and seat board pad 6 will adaptively adjust to the curve of the human body, realizing the adjustment of more detailed body parts on the basis of overall zone adjustment. Continue reading Figure 2-Figure 7 and Figure 10 : The adaptive adjustment cushion includes an adaptive adjustment plate assembly 8 and a soft pad 7 laid on the adaptive adjustment plate assembly 8; the adaptive adjustment plate assembly 8 includes a support plate 81 and a plurality of unit adaptive adjustment members 82 elastically and movably inserted on the support plate 81; the support plate 81 is fixed inside the backrest cushion 5 and / or the seat cushion 6; It should be noted that the cushion 7 is a prior art, and its detailed structure can be found in existing literature and journals. It can also be purchased directly on the market, or components can be purchased on the market to form it. It is not the subject of the present invention and will not be elaborated on in detail. The unit adaptive adjustment member 82 includes an adaptive adjustment body 86, and the adaptive adjustment body 86 includes an adjustment rod body 862 and a support plate 861. The support plate 861 is arranged at the end of the adjustment rod body 862, and the support plate 861 is used to support the body; the adjustment rod body 862 drives the support plate 861 through telescoping to adapt to different parts of the body; the adjustment rod body 862 is provided with an angle adaptive head 864 at its end, and the angle adaptive head 864 is assembled on the support plate 861. The support plate 861 is adaptively adjusted to multiple angles through the angle adaptive head 864 to adapt to the curve changes of the body.

[0017] In the embodiment of the present invention, existing ergonomic chairs are divided into regions for overall adjustment, such as the back, waist, and legs. However, this will result in the inability to adjust more detailed body parts. The present application can achieve: After a person sits on the ergonomic chair frame, the ergonomic chair frame supports the human body through the headrest 1, backrest 2 and seat board 3. During this process, the backrest 2 and seat board 3 will be in direct contact with the human body through the backrest cushion 5 and seat board cushion 6; several adaptive adjustment pads in the backrest cushion 5 and seat board cushion 6 will follow the curve of the human body to adaptively adjust multiple local or multiple local unit adaptive adjustment parts 82. The unit adaptive adjustment part 82 drives the support plate 861 to adapt to different parts of the body through the adjustment rod 862 on the adaptive adjustment body 86, and then cooperates with the support plate 861 to perform adaptive multi-angle adjustment through the angle adaptive head 864 to adapt to the changes in the curve of the body, so as to achieve adjustment of finer body parts on the basis of adjustment of the overall partition.

[0018] In the embodiment of the present invention, please refer to Figure 3 、 Figure 7 and Figure 8 : The adjusting rod body 862 includes an electric telescopic rod 863, and the angle adaptive head 864 is assembled at the end of the electric telescopic rod 863; the electric telescopic rod 863 is movably inserted in the elastic support plate 81.

[0019] It should be noted that the electric telescopic rod 863 can be replaced by a hydraulic telescopic rod, or a pneumatic telescopic rod, etc., which are all existing technologies. There is no restriction on its specific structure as long as it can meet the telescopic adjustment requirements; at the same time, it can be purchased directly on the market, and there are related descriptions in corresponding journals. It is not what the present invention wants to protect, so it will not be elaborated here.

[0020] In the embodiment of the present invention, please refer to Figure 3-Figure 5 : The electric telescopic rod 863 is fixedly sleeved with a fixed disk 83 on the outside, and a plurality of springs A84 are connected to the fixed disk 83, and the plurality of springs A84 are distributed in a circular array along the fixed disk 83; the springs A84 are distributed parallel to the electric telescopic rod 863; the end of the spring A84 away from the fixed disk 83 is connected to the support plate 81; after the adjusting rod body 862 is squeezed, the electric telescopic rod 863 can be inserted into the support plate 81 in a straight line, and in this process, the spring A84 is pulled to extend.

[0021] For further information, see Figure 3-Figure 5 : A limiting ring 85 is fixed on the electric telescopic rod 863 above the support plate 81, and the limiting ring 85 is used to prevent the spring A84 from being over-stretched.

[0022] In the embodiment of the present invention, please refer to Figure 7-10 : The angle adaptive head 864 includes a drag tray 8642, which is fixed at the end of the electric telescopic rod 863; a support column 8641 is fixed on the side of the drag tray 8642 away from the electric telescopic rod 863, and a hinge ball 8644 is fixed at the end of the support column 8641, and the hinge ball 8644 is hinged on the abutment plate 861, and a ball hinge cavity is provided on the abutment plate 861 to cooperate with the hinge ball 8644.

[0023] For further information, see Figure 9 and Figure 10 : The tray 8642 is connected to multiple springs B8643, which are located around the support column 8641 and distributed in a circular array along the main body of the tray 8642; the end of the spring B8643 away from the tray 8642 is connected to the abutment plate 861.

[0024] Therefore, after a person sits on the ergonomic chair frame, the ergonomic chair frame supports the human body through the headrest 1, backrest 2 and seat board 3. During this process, the backrest 2 and seat board 3 will directly contact the human body through the backrest cushion 5 and seat board pad 6; during the process of direct contact between the backrest cushion 5 and seat board pad 6 and the human body, the adaptive adjustment parts 82 of multiple local units are adaptively adjusted, and the electric telescopic rod 863 linearly penetrates through the support plate 81 and pulls the spring A84 to extend, and at the same time, the electric telescopic rod 863 is started to extend and retract, completing the expansion and contraction of the adjustment rod body 862 on the adaptive adjustment body 86 to drive the support plate 861 to adapt to the depression of different parts of the body; after the support plate 861 is squeezed, the support plate 861 can be rotated at multiple angles using the hinge ball 8644. During this process, multiple springs B8643 can cooperate to perform expansion and contraction adjustment, completing the adaptive multi-angle adjustment of the support plate 861 through the angle adaptive head 864, forming an arc-shaped adaptive depression area 9 (such as Figure 11 As described above), in order to adapt to the changes in body curves, it is possible to adjust more detailed body parts based on the adjustment of the overall partition.

[0025] In an embodiment of the present invention, when a human body sits on the chair, the chair frame transmits support force through the headrest 1, backrest 2, and seat plate 3, wherein the backrest cushion 5 and seat plate cushion 6 are in direct contact with the human body. During the contact process, the unit adaptive adjustment member 82 is triggered, driving the electric telescopic rod 863 to pass through the support plate 81 and stretch the spring A84, and the linkage adjustment rod body 862 pushes the support plate 861 to fit the body's depression. At the same time, after being compressed, the support plate 861 rotates in multiple directions through the hinge ball 8644, cooperates with the spring B8643 to expand and contract, and completes multi-angle adjustment through the angle adaptive head 864, finally forming an arc-shaped adaptive depression area 9, realizing millimeter-level precise adaptation from partition support to local muscle groups.

[0026] In the embodiment of the present invention, please refer to Figure 6: A flexible piezoelectric sensor array is embedded in the surface of the abutment plate 861. The flexible piezoelectric sensor array is used to collect pressure distribution / muscle tremor frequency in real time and judge the fatigue of the lumbar erector spinae muscles through micro-current electromyography detection.

[0027] Therefore, the flexible piezoelectric sensor array collects pressure distribution / muscle tremor frequency in real time, and determines the fatigue of the lumbar erector spinae muscles through microcurrent electromyography. When it detects that the muscles on one side are continuously tense (sitting in a tilted position), the electric telescopic rod 863 is automatically controlled to extend 5-8 mm on the weak side, and the spring B8643 is shortened to form a corrective thrust to dynamically balance the force on the spine; the electric telescopic rod 863 adjusts itself through its own expansion and contraction, so that the unit adaptive adjustment part 82 can massage the body.

[0028] The flexible piezoelectric sensor array is a flexible array sensor system based on piezoelectric materials. It converts mechanical stress (pressure, deformation, vibration, etc.) into electrical signals to achieve high-precision dynamic monitoring. Its core value lies in its self-powered, high-sensitivity, multi-dimensional sensing, and surface conformability. The flexible piezoelectric sensing array includes a surface force conduction layer, an electrode layer, a piezoelectric functional layer, and a flexible base layer. The surface force conduction layer has a micro-protrusion array structure and is made of polydimethylsiloxane or silicone. The flexible piezoelectric sensor array also includes a sensor unit array, a signal processing module, and an environmental adaptation module. The sensor unit array includes capacitive units and resistive units. The capacitive unit is a PVDF film sandwiched between upper and lower electrodes to form a piezoelectric capacitor (the charge is proportional to the pressure); the resistive unit is an Ag / PDMS-TiO2 composite that changes resistance through deformation. The signal processing module includes an organic field-effect transistor (FET) and a row-column scanning circuit. The FET uses a piezoelectric signal to directly drive the gate, amplifying the source-drain current by 40 times (with a detection limit as low as 0.1N). The row-column scanning circuit reduces the number of leads (e.g., a 6-element array requires only 10 leads). The environmental adaptation module includes anti-interference packaging and curved surface self-adhesion. The anti-interference packaging is a silicone-wrapped electrode layer, which is waterproof and moisture-proof (cycle life > 4000 times); the curved surface self-adhesion is the adaptive bending of the liquid crystal elastomer substrate (arch test curvature compatibility > 60%).

[0029] The flexible piezoelectric sensor array realizes cross-field applications from industrial detection to medical health through its four-level structure of "micro-protrusion force conduction-piezoelectric material conversion-electrode signal collection-flexible substrate support".

[0030] In the embodiment of the present invention, please refer to Figure 1 : The seat plate 3 is assembled on the supporting chassis 4, which includes a steel five-star foot and a four-stage gas pressure rod.

[0031] It should be noted that the steel five-star feet and four-stage gas pressure rods are both existing technologies. Their detailed structures can be found in existing literature journals. They can also be purchased directly on the market, or parts can be purchased on the market to assemble them, etc.; they are not what the present invention wants to protect and will not be elaborated here.

[0032] In the description of the present invention, unless otherwise specified, "several" means two or more. Although the embodiments of the present invention have been shown and described in the description of the present invention, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptively adjustable ergonomic office chair, comprising an ergonomic chair frame, a plurality of adaptively adjustable pads being arranged on the ergonomic chair frame, the plurality of adaptively adjustable pads being arranged in an array along the main body of the ergonomic chair frame; characterized in that: The adaptive adjustment pad includes an adaptive adjustment plate assembly (8) and a soft pad (7) laid on the adaptive adjustment plate assembly (8); the adaptive adjustment plate assembly (8) includes a support plate (81) and a plurality of unit adaptive adjustment members (82) elastically and movably inserted on the support plate (81); the support plate (81) is fixed inside the backrest cushion (5) and / or the seat cushion (6); The unit adaptive adjustment member (82) includes an adaptive adjustment body (86), the adaptive adjustment body (86) includes an adjustment rod body (862) and a support plate (861), the support plate (861) is arranged at the end of the adjustment rod body (862), and the support plate (861) is used to support the body; the adjustment rod body (862) drives the support plate (861) by telescoping, and is used to adapt to different parts of the body; the adjustment rod body (862) is provided with an angle adaptive head (864) at its end, and the angle adaptive head (864) is assembled on the support plate (861), and the support plate (861) is adaptively adjusted at multiple angles through the angle adaptive head (864), and is used to adapt to changes in the curve of the body.

2. The self-adaptive ergonomic office chair according to claim 1, characterized in that: The ergonomic chair frame comprises a headrest (1), a backrest (2) and a seat panel (3), wherein the headrest (1) is assembled on the backrest (2), and the backrest (2) is assembled on the seat panel (3); a backrest cushion (5) is laid on the backrest (2), and a seat panel pad (6) is laid on the seat panel (3); and a plurality of self-adaptive adjustment pads are laid inside the backrest cushion (5) and the seat panel pad (6).

3. The self-adaptive ergonomic office chair according to claim 1, characterized in that: The adjusting rod body (862) includes an electric telescopic rod (863), and an angle adaptive head (864) is assembled at the end of the electric telescopic rod (863); the electric telescopic rod (863) is movably inserted into the elastic support plate (81).

4. The self-adaptive ergonomic office chair according to claim 2, characterized in that: The electric telescopic rod (863) is externally sleeved with a fixed disk (83), and the fixed disk (83) is connected to a plurality of springs A (84), and the plurality of springs A (84) are distributed in a circular array along the fixed disk (83); the springs A (84) and the electric telescopic rod (863) are distributed in parallel; one end of the spring A (84) away from the fixed disk (83) is connected to the support plate (81); after the adjusting rod body (862) is squeezed, the electric telescopic rod (863) can be inserted into the support plate (81) in a straight line, and in this process, the springs A (84) are pulled to extend.

5. The self-adaptive ergonomic office chair according to claim 4, characterized in that: A limiting ring (85) is fixed on the electric telescopic rod (863) above the support plate (81), and the limiting ring (85) is used to prevent the spring A (84) from being excessively stretched.

6. The self-adaptive ergonomic office chair according to claim 2, characterized in that: The angle-adaptive head (864) includes a tray (8642) fixed to the end of the electric telescopic rod (863); a support column (8641) is fixed to the side of the tray (8642) away from the electric telescopic rod (863); a hinge ball (8644) is fixed to the end of the support column (8641); the hinge ball (8644) is hinged to the support plate (861); and a ball hinge cavity is provided on the support plate (861) to cooperate with the hinge ball (8644).

7. The self-adaptive ergonomic office chair according to claim 6, characterized in that: The tray (8642) is connected to a plurality of springs B (8643), which are located around the support column (8641) and distributed in a circular array along the main body of the tray (8642); one end of the spring B (8643) away from the tray (8642) is connected to the abutment plate (861).

8. The self-adaptive ergonomic office chair according to any one of claims 1 to 7, characterized in that: A flexible piezoelectric sensor array is embedded in the surface of the abutment plate (861), and the flexible piezoelectric sensor array is used to collect pressure distribution / muscle tremor frequency in real time, and to judge the fatigue degree of the lumbar erector spinae muscles through micro-current electromyography.

9. The self-adaptive ergonomic office chair according to any one of claims 1 to 7, characterized in that: The seat plate (3) is assembled on a supporting chassis (4), and the supporting chassis (4) includes a steel five-star foot and a four-stage gas pressure rod.

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