High-stability ergonomic office chair

Abstract

The present application relates to the technical field of ergonomic office chair, and particularly relates to a high-stability ergonomic office chair, which comprises a base, a supporting plate is arranged above the base, a cushion is wrapped on the supporting plate, the top of the cushion is upwardly raised to form a convex on both sides, the supporting plate is connected with the base through a lifting piece, and the height of the supporting plate above the base is adjustable; a supporting frame is arranged on one side of the supporting plate, a supporting mesh cloth is installed on the inner side of the supporting frame, and the supporting frame is connected with the supporting plate through a connecting piece; two arc-shaped supporting pads are arranged below the side of the supporting mesh cloth close to the supporting plate, and the concave surface of the supporting pad is arranged towards the supporting mesh cloth. The arc-shaped supporting pad which can be self-adaptively deflected is arranged below the supporting mesh cloth, and the elastic support is provided in cooperation with the third torsional spring, so that the problem of traditional ergonomic chair waist suspension is effectively solved, the waist fatigue and body shaking caused by long sitting are avoided, and the sitting posture stability is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of ergonomic office chair technology, and in particular to a highly stable ergonomic office chair. Background Technology

[0002] Ergonomic office chairs are chairs designed based on ergonomic science. Through multi-dimensional adjustable structure and biomimetic curves, they actively adapt to the physiological characteristics of the human body. They are professional office chairs with the core purpose of relieving fatigue from prolonged sitting, protecting the spine, and maintaining healthy posture.

[0003] Existing ergonomic office chairs, in order to improve back comfort when leaning against the backrest, often use a flexible support spine connecting the seat and backrest. When the user leans against the backrest, the cushion tilts and reclines as the user's back presses against it, providing sufficient support. However, this leaves the lumbar region unsupported. While this provides short-term stability thanks to back support, prolonged use can lead to lumbar fatigue due to lack of support, causing the body to sway and resulting in chair instability. Therefore, we propose a highly stable ergonomic office chair. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by proposing a highly stable ergonomic office chair.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a highly stable ergonomic office chair, including a base, a support plate provided above the base, a seat cushion wrapped on the support plate, the top two sides of the seat cushion both bulge upward to form protrusions, and the support plate and the base are connected by a lifting component, so that the height of the support plate above the base is adjustable. A support frame is provided on one side of the support plate, and a support mesh is installed on the inside of the support frame. The support frame is connected to the support plate through connectors. Two arc-shaped support pads are provided on the side of the support mesh near the support plate. The concave surface of the support pads faces the support mesh and the two support pads are symmetrically arranged at both ends of the support mesh. A third U-shaped seat is provided inside the support pads. A third rotating shaft is rotatably installed inside the third U-shaped seat. A third connecting seat is installed on the third rotating shaft and fixed to the support pads. A third torsion spring is sleeved on the third rotating shaft. One end of the third torsion spring is fixed to the third U-shaped seat and the other end of the third torsion spring is fixed to the third connecting seat. The third U-shaped seat is installed on the fixed frame, and the fixed frame is set on the adjusting component, which is installed on the connecting component, so that the height and angle of the support pad can be adjusted.

[0006] Preferably, a number of equally spaced support legs are installed along the edge of the base, with the end of the support leg away from the base bent downward to support the base, and casters are installed at the bottom of the support leg.

[0007] Preferably, the lifting component includes a cylinder, the bottom of which is fixed to a base, and a support seat is installed on the top of the cylinder. A support frame with an upwardly curved L-shape is installed on the top of the support seat. The top of the support frame is connected to a support plate, and a cylinder switch for adjusting the air intake and exhaust of the cylinder is provided on the side of the support seat.

[0008] Preferably, L-shaped rods are provided on both sides of the support frame. One end of the L-shaped rod is rotatably connected to the support frame through a damping bearing. A handrail is provided at the top of the L-shaped rod. A strip plate is installed at the bottom of the handrail. A slide rail is installed at the bottom of the strip plate, and a slider is slidably installed on the slide rail. The slider is rotatably connected to the L-shaped rod through a damping bearing.

[0009] Preferably, the connector includes a strip seat, which is located on the side of the support mesh away from the support plate. Each edge of the strip seat is equipped with a support rod with one end bent into an L shape. The other end of the support rod is fixed to the corner of the support frame. An arc-shaped first connecting plate is installed on the bottom of the strip seat. The concave surface of the first connecting plate faces the seat cushion, and the other end of the first connecting plate is fixed to the support plate. A second connecting plate with an L-shaped top is provided on the side of the strip seat away from the supporting mesh. The top of the second connecting plate is fixed to the strip seat, and an arc-shaped third connecting plate is installed at the bottom of the second connecting plate. The concave surface of the third connecting plate faces the strip seat, and a fourth connecting plate is installed at the bottom of the third connecting plate. The other end of the fourth connecting plate is fixed to the support frame.

[0010] Preferably, the first connecting plate, the second connecting plate, the third connecting plate, the fourth connecting plate, and the support rod are all made of one of the following materials: reinforced nylon and modified PP.

[0011] Preferably, a strip cavity is provided at the top of the strip seat, a lifting frame is built into the strip cavity, and a first locking bolt is threaded onto the top outer wall of the strip seat, with the end of the first locking bolt penetrating the strip seat and corresponding to the lifting frame. A second U-shaped seat is connected to the top of the lifting frame. A second rotating shaft is rotatably installed inside the second U-shaped seat. A second connecting seat is installed on the second rotating shaft. A second torsion spring is sleeved on the second rotating shaft. One end of the second torsion spring is fixed to the second connecting seat, and the other end of the second torsion spring is fixed to the second U-shaped seat. The other end of the second connecting seat is connected to a first U-shaped seat. A first rotating shaft is rotatably installed inside the first U-shaped seat. The axis of the first rotating shaft is perpendicular to the axis of the second rotating shaft. A first connecting seat is installed on the first rotating shaft. An arc-shaped headrest is installed on the end of the first connecting seat. The concave surface of the headrest is set away from the first connecting seat. A first torsion spring is sleeved on the first rotating shaft. One end of the first torsion spring is fixed to the first connecting seat, and the other end of the first torsion spring is fixed to the first U-shaped seat.

[0012] Preferably, the headrest, seat cushion, and support cushion all include a reinforcing plate of a corresponding shape, and the reinforcing plate is fixed in the sponge pad. A breathable mesh cover is wrapped around the outside of the sponge pad. The support plate has multiple through holes arranged at intervals, and a groove is opened on the side of the support plate, which penetrates the side of the support plate.

[0013] Preferably, the adjusting component includes a fourth connecting seat, which is fixed to the middle of the fixing frame. The other side of the fourth connecting seat is provided with a protective cover with an opening on one side. The fourth connecting seat is placed inside the protective cover, and a drive shaft is installed on the fourth connecting seat. The end of the drive shaft is rotatably connected to the inner wall of the protective cover. A driving component that drives the drive shaft to rotate is installed at one end of the drive shaft. A ring-shaped fixing frame is installed on the outer wall of the protective cover. The fixing frame is fitted onto the strip seat, and a limiting plate with an L-shaped end is provided on the other side of the fixing frame. The end of the limiting plate is fixed to the strip seat. The fixing frame is placed inside the limiting plate. A strip groove is opened on the limiting plate. A second locking bolt is placed inside the strip groove. The second locking bolt is threaded to the fixing frame. A ring-shaped pressure block is fitted on the screw of the second locking bolt. One end of the pressure block corresponds to the nut of the second locking bolt, and the other end of the pressure block corresponds to the outer wall of the limiting plate. A limiting groove is provided on the side of the fixed frame, and a strip-shaped limiting block is built into the limiting groove. The limiting block is fixed to the outer wall of the strip seat along the length direction of the strip seat.

[0014] Preferably, the driving component includes a first bevel gear, which is coaxially mounted on one end of a transmission shaft. A second bevel gear meshes with the side of the first bevel gear. A drive shaft is coaxially mounted on the second bevel gear. The end of the drive shaft is fixed to the inner wall of the protective cover. A worm gear is also coaxially mounted on the drive shaft. A worm meshes with the worm gear. The end of the worm passes through the protective cover and is connected to a handle. The worm is rotatably connected to the protective cover.

[0015] The design scheme proposed in this invention has the following beneficial effects during application: 1. This invention effectively solves the problem of lumbar slumber in traditional ergonomic chairs by setting an adaptively deflectable arc-shaped support pad under the support mesh and providing elastic support with a third torsion spring, thus avoiding lumbar fatigue and body swaying during prolonged sitting and significantly improving the stability of the sitting posture.

[0016] 2. This invention achieves precise adjustment of the height and angle of the support pad through the adjustment component. Combined with the seat cushion lifting, multi-directional adjustment of the armrests, and adaptive floating of the headrest, it can adapt to the sitting posture needs of users of different heights and body types, conforming to the human body curves in all dimensions.

[0017] 3. This invention, through the rotating connection of the headrest, enables the headrest to have dual-axis deflection in the front and back and left and right directions, as well as adaptive floating with torsion springs, so that the headrest can automatically conform to the head movement, effectively dispersing cervical spine pressure and improving the comfort of reclining rest. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is the front view of the present invention; Figure 4 This is a schematic diagram of the handrail structure of the present invention; Figure 5 This is a schematic diagram of the connector structure of the present invention; Figure 6 This is a schematic diagram of the headrest structure of the present invention; Figure 7 This is a schematic diagram of the structure of the strip seat of the present invention; Figure 8 This is a schematic diagram of the support pad structure of the present invention; Figure 9 This is a schematic diagram of the drive component structure of the present invention.

[0019] In the diagram: 1. Base; 2. Support leg; 3. Caster wheel; 4. Cylinder; 5. Support seat; 6. Cylinder switch; 7. Support frame; 8. Support plate; 9. Seat cushion; 10. Slot; 11. Through hole; 12. Protrusion; 13. L-shaped rod; 14. Slider; 15. Slide rail; 16. Strip plate; 17. Armrest; 18. Support frame; 19. Support mesh; 20. Strip seat; 21. Support rod; 22. First connecting plate; 23. Second connecting plate; 24. Third connecting plate; 25. Fourth connecting plate; 26. Strip cavity; 27. Lifting frame; 28. First locking bolt; 29. ​​Headrest; 30. First connecting seat; 31. First rotating shaft; 2. First U-shaped seat; 33. First torsion spring; 34. Second connecting seat; 35. Second U-shaped seat; 36. Second rotating shaft; 37. Second torsion spring; 38. Support pad; 39. Third connecting seat; 40. Third rotating shaft; 41. Third U-shaped seat; 42. Third torsion spring; 43. Fixing frame; 44. Fourth connecting seat; 45. Protective cover; 46. Transmission shaft; 47. First bevel gear; 48. Second bevel gear; 49. Drive shaft; 50. Worm gear; 51. Worm; 52. Handle; 53. Fixing frame; 54. Limiting plate; 55. Strip groove; 56. Second locking bolt; 57. Pressure block; 58. Limiting groove; 59. Limiting block. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example Reference Figures 1-9 A highly stable ergonomic office chair includes a base 1, a support plate 8 above the base 1, and a seat cushion 9 wrapped on the support plate 8. The top two sides of the seat cushion 9 are raised to form protrusions 12, so that the central area of ​​the top of the seat cushion 9 forms a downward-inward structure. When the user sits on the seat cushion 9, the protrusions 12 can limit and wrap the sides of the user's buttocks, thereby improving the stability of the user sitting on the seat cushion 9.

[0022] The support plate 8 is connected to the base 1 via a lifting mechanism, allowing the height of the support plate 8 above the base 1 to be adjustable. Figure 2 and Figure 3As shown, the lifting component includes a cylinder 4, the bottom of which is fixed to the base 1. A support seat 5 is installed on the top of the cylinder 4, and a support frame 7 with an upwardly curved L-shape is installed on the top of the support seat 5. The top of the support frame 7 is connected to the support plate 8. A cylinder switch 6 is provided on the side of the support seat 5 to adjust the air intake and exhaust of the cylinder 4. In actual use, the cylinder 4 is a four-stage high-pressure nitrogen pneumatic lifting rod with a maximum load capacity that can be controlled between 120-150kg, providing better load-bearing capacity for the ergonomic office chair. The cylinder switch 6 can be used to control the extension and retraction of the cylinder 4, realizing stepless adjustment of the seat cushion 9 height to suit the sitting posture needs of users of different heights.

[0023] It should be noted that, as Figure 1 As shown, several support legs 2 are installed at equal intervals along the edge of the base 1. The end of the support leg 2 away from the base 1 is bent downward to support the base 1. A caster wheel 3 is installed at the bottom of the support leg 2. In actual use, the caster wheel 3 is a fully enclosed PU silent wheel. It is a high-strength hard wheel core with an outer layer of high-elastic PU covering, which ensures the wear resistance and load-bearing strength of the caster wheel 3 and reduces the noise of the caster wheel 3 movement.

[0024] A support frame 18 is provided on one side of the support plate 8, and a support mesh 19 is installed on the inner side of the support frame 18. The support mesh 19 is one of the following: dragon pattern mesh, high elasticity mesh, or leopard mesh. That is, the support mesh 19 is woven from a highly elastic and breathable material. When the support mesh 19 is subjected to force, it can deform evenly, so that the support mesh 19 fits the curve of the user's back better, and there will be no stuffiness or sweating even after long-term use.

[0025] The support frame 18 is connected to the support plate 8 via connectors, such as... Figure 5 As shown, the connector includes a strip seat 20, which is located on the side of the support mesh 19 away from the support plate 8. Each edge of the strip seat 20 is equipped with a support rod 21 with one end bent into an L shape. The other end of the support rod 21 is fixed to the corner of the support frame 18. An arc-shaped first connecting plate 22 is installed on the bottom of the strip seat 20. The concave surface of the first connecting plate 22 faces the seat cushion 9, and the other end of the first connecting plate 22 is fixed to the support plate 8, providing support between the support frame 18 and the support plate 8.

[0026] A second connecting plate 23 with an L-shaped top is provided on the side of the strip base 20 away from the supporting mesh 19. The top of the second connecting plate 23 is fixed to the strip base 20, and an arc-shaped third connecting plate 24 is installed at the bottom of the second connecting plate 23. The concave surface of the third connecting plate 24 faces the strip base 20, and a fourth connecting plate 25 is installed at the bottom of the third connecting plate 24. The other end of the fourth connecting plate 25 is fixed to the support frame 7, providing additional support between the support frame 18 and the support plate 8, improving the stress strength of the supporting mesh 19. The coordinated force of multiple connecting plates can disperse the pressure generated when the user's back leans against the supporting mesh 19, preventing the connecting parts from breaking or deforming, and improving the overall strength and service life of the supporting mesh 19. In actual use, the second connecting plate 23, the third connecting plate 24, and the fourth connecting plate 25 are integrally injection molded.

[0027] Furthermore, the first connecting plate 22, the second connecting plate 23, the third connecting plate 24, the fourth connecting plate 25, and the support rod 21 are all made of one of the following materials: reinforced nylon and modified PP. This type of material has the characteristics of high strength, high toughness, impact resistance, and lightweight, and can maintain the structural stability of the connecting parts for a long time without increasing the overall weight of the ergonomic office chair.

[0028] It needs to be further explained that, such as Figure 2 and Figure 4 As shown, L-shaped rods 13 are provided on both sides of the support frame 7. One end of the L-shaped rod 13 is rotatably connected to the support frame 7 through a damping bearing, allowing the L-shaped rod 13 to deflect on the side of the support frame 7. A handrail 17 is provided at the top of the L-shaped rod 13. A strip plate 16 is installed at the bottom of the handrail 17. A slide rail 15 is installed at the bottom of the strip plate 16, and a slider 14 is slidably installed on the slide rail 15. The slider 14 is rotatably connected to the L-shaped rod 13 through a damping bearing, which can adjust the position and angle of the handrail 17. The damping bearing provides moderate resistance, allowing the handrail 17 to be positioned automatically after adjustment without shaking.

[0029] Specifically, when the armrest 17 is not needed, the L-shaped rod 13 can be rotated to move the armrest 17 to the bottom of the seat cushion 9 or the back of the support mesh 19 for storage, making the space on both sides of the seat cushion 9 more spacious and facilitating leg movement.

[0030] like Figure 1 and Figure 8As shown, two arc-shaped support pads 38 are provided below the support mesh 19 on the side near the support plate 8. The concave surfaces of the support pads 38 face the support mesh 19, and the two support pads 38 are symmetrically arranged at both ends of the support mesh 19. A third U-shaped seat 41 is provided inside the support pads 38. A third rotating shaft 40 is rotatably mounted inside the third U-shaped seat 41. A third connecting seat 39 is mounted on the third rotating shaft 40 and is fixed to the support pads 38. A third torsion spring 42 is sleeved on the third rotating shaft 40. One end of the third torsion spring 42 is fixed to the third U-shaped seat 41, and the other end of the third torsion spring 42 is fixed to the third connecting seat 39. This allows the two support pads 38 to deflect between them, allowing the support pads 38 to better fit the sides of the waist and provide support for the waist. It also provides good adaptability for users with different waist sizes. The elasticity of the third torsion spring 42 also provides stress support for the deflection of the support pads 38, ensuring that the support pads 38 fully support the waist area. The third U-shaped seat 41 is mounted on the fixed frame 43, and the fixed frame 43 is set on the adjusting member, which is mounted on the connecting member, so that the height and angle of the support pad 38 can be adjusted. Figure 7 and Figure 9 As shown, the adjusting component includes a fourth connecting seat 44, which is fixed to the middle of the fixing frame 43. The other side of the fourth connecting seat 44 is provided with a protective cover 45 with an opening on one side. The fourth connecting seat 44 is placed inside the protective cover 45, and a drive shaft 46 is installed on the fourth connecting seat 44. The end of the drive shaft 46 is rotatably connected to the inner wall of the protective cover 45. A driving component that drives the drive shaft 46 to rotate is installed at one end of the drive shaft 46. Under the action of the driving component, the arc-shaped support pad 38 is deflected upward, so that even when the user leans back against the support mesh 19 and tilts the support mesh 19 at a greater angle, the arc-shaped convex surface of the support pad 38 can still accurately rest against the user's waist to support the waist, further improving the usability of the support pad 38. The protective cover 45 can prevent dust and debris from entering the transmission structure, ensuring the long-term stable operation of the driving component and avoiding jamming or failure.

[0031] Specifically, the driving component includes a first bevel gear 47, which is coaxially mounted on one end of a transmission shaft 46. A second bevel gear 48 meshes with the side of the first bevel gear 47. A drive shaft 49 is coaxially mounted on the second bevel gear 48. The end of the drive shaft 49 is fixed to the inner wall of the protective cover 45. A worm gear 50 is also coaxially mounted on the drive shaft 49. A worm 51 meshes with the worm gear 50. The end of the worm 51 passes through the protective cover 45 and is connected to a handle 52. The worm 51 is rotatably connected to the protective cover 45. The user can hold the handle 52 to drive the support pad 38 to rotate, thereby manually adjusting the angle of the support pad 38. The transmission action of the worm gear 50 and the worm 51 can also lock the adjusted support pad 38, preventing it from rotating unexpectedly due to force, which would cause the support pad 38 to not be aligned with the waist.

[0032] If the height of the support pad 38 is insufficient to support the user's waist, a ring-shaped fixing frame 53 is installed on the outer wall of the protective cover 45. The fixing frame 53 is fitted onto the strip seat 20, and a limiting plate 54 with an L-shaped end is provided on the other side of the fixing frame 53. The end of the limiting plate 54 is fixed to the strip seat 20. The fixing frame 53 is placed inside the limiting plate 54, and a strip groove 55 is provided on the limiting plate 54. A second locking bolt 56 is installed in the strip groove 55. The second locking bolt 56 is threadedly connected to the fixing frame 53, and a ring-shaped fixing frame 53 is fitted onto the thread of the second locking bolt 56. The pressure block 57 has one end corresponding to the nut of the second locking bolt 56 and the other end corresponding to the outer wall of the limiting plate 54. The pressure block 57 increases the locking contact area, making the second locking bolt 56 more secure. The strip groove 55 limits the lifting stroke, making the operation simple and quick, and adaptable to the waist position of people of different heights. When adjusting the support pad 38, the user can first loosen the second locking bolt 56 to move the support pad 38, so that the height of the support pad 38 can be accurately placed on the user's waist. Then, tighten the second locking bolt 56 to fix the support pad 38.

[0033] A limiting groove 58 is provided on the side of the fixed frame 53. A strip-shaped limiting block 59 is built into the limiting groove 58. The limiting block 59 is fixed on the outer wall of the strip seat 20 along the length direction of the strip seat 20, so that the support pad 38 can be stably raised and lowered in the vertical direction when it is raised and lowered, and the support pad 38 will not deflect, so as not to cause the position of the support pad 38 acting on the waist to deviate.

[0034] It needs to be further explained that, such as Figure 5 and Figure 6As shown, a strip cavity 26 is provided on the top of the strip seat 20, and a lifting frame 27 is built into the strip cavity 26. A first locking bolt 28 is threaded onto the top outer wall of the strip seat 20. The end of the first locking bolt 28 passes through the strip seat 20 and corresponds to the lifting frame 27. That is, the lifting frame 27 can be adjusted in height within the strip cavity 26 and is fastened by the first locking bolt 28.

[0035] A second U-shaped seat 35 is connected to the top of the lifting frame 27. A second rotating shaft 36 is rotatably mounted inside the second U-shaped seat 35. A second connecting seat 34 is mounted on the second rotating shaft 36. A second torsion spring 37 is sleeved on the second rotating shaft 36. One end of the second torsion spring 37 is fixed to the second connecting seat 34, and the other end of the second torsion spring 37 is fixed to the second U-shaped seat 35. The other end of the second connecting seat 34 is connected to a first U-shaped seat 32. A first rotating shaft 31 is rotatably mounted inside the first U-shaped seat 32. The axis of the first rotating shaft 31 is perpendicular to the axis of the second rotating shaft 36. A first connecting seat 30 is mounted on the first rotating shaft 31. An arc-shaped headrest 29 is mounted on the end of the first connecting seat 30. The concave surface of the headrest 29 is positioned away from the first connecting seat 30. A first torsion spring 37 is sleeved on the first rotating shaft 31. Spring 33, one end of the first torsion spring 33 is fixed to the first connecting seat 30, and the other end of the first torsion spring 33 is fixed to the first U-shaped seat 32. That is, the adjustment of the lifting frame 27 in the strip cavity 26 is actually to adjust the height of the headrest 29, so that when the user leans against the support mesh 19, the head or neck can rest on the headrest 29, further improving the comfort of the ergonomic office chair. The multi-directional deflection of the headrest 29 and the action of the torsion spring allow the headrest 29 to move together when the user's head is deflected, so that the concave surface of the headrest 29 always wraps around the head, ensuring the comfort of the head. The cooperation of the first torsion spring 33 and the second torsion spring 37 realizes the adaptive floating of the headrest 29 in front and behind and left and right, so that the headrest 29 further conforms to the neck and back of the head, and disperses the pressure on the cervical spine, protecting the health of the cervical spine.

[0036] Furthermore, the headrest 29, seat cushion 9, and support pad 38 all include reinforcing plates of corresponding shapes, and the reinforcing plates are fixed in the sponge pad. A breathable mesh cover is wrapped around the outside of the sponge pad. The support plate 8 has multiple through holes 11 arranged at intervals, and a slot 10 is opened on the side of the support plate 8, which penetrates the side of the support plate 8. This ensures the comfort of the headrest 29, seat cushion 9, and support pad 38 while improving their breathability.

[0037] Specifically, during use, the user first adjusts the seat cushion 9 to a suitable height using the cylinder switch 6, and then adjusts the position and angle of the armrests 17 according to the sitting posture. After sitting down, the raised sections 12 on both sides of the seat cushion 9 wrap around the buttocks, improving the stability of the sitting posture. When the back is leaning against the support mesh 19, the support mesh 19 deforms evenly to conform to the curve of the back, and the support pads 38 on both sides of the waist adapt to fit and support, completely eliminating the problem of the waist being unsupported and avoiding waist pain and body swaying caused by prolonged sitting. The height and angle of the support pads 38 can be precisely adjusted through the adjustment components to adapt to users of different body types. The headrest 29 can adapt to float and conform to the head and neck, dispersing cervical spine pressure. The overall structure works together to achieve all-dimensional stable support for the sitting posture, greatly improving the safety and comfort of prolonged sitting and solving the core defects of traditional ergonomic chairs such as instability when leaning back and unsupported waist.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A highly stable ergonomic office chair, characterized in that: Includes a base (1), a support plate (8) is provided above the base (1), a cushion (9) is wrapped on the support plate (8), the top two sides of the cushion (9) are raised to form a protrusion (12), and the support plate (8) is connected to the base (1) through a lifting component, so that the height of the support plate (8) above the base (1) is adjustable; A support frame (18) is provided on one side of the support plate (8), and a support mesh (19) is installed on the inner side of the support frame (18). The support frame (18) is connected to the support plate (8) through a connector. Two arc-shaped support pads (38) are provided below the support mesh (19) on the side close to the support plate (8). The concave surface of the support pads (38) faces the support mesh (19), and the two support pads (38) are symmetrically arranged at both ends of the support mesh (19). A third U-shaped seat (41) is provided inside the support pads (38). A third rotating shaft (40) is rotatably installed inside the third U-shaped seat (41). A third connecting seat (39) is installed on the third rotating shaft (40). The third connecting seat (39) is fixed to the support pads (38). A third torsion spring (42) is sleeved on the third rotating shaft (40). One end of the third torsion spring (42) is fixed to the third U-shaped seat (41), and the other end of the third torsion spring (42) is fixed to the third connecting seat (39). The third U-shaped seat (41) is installed on the fixed frame (43), and the fixed frame (43) is set on the adjusting member. The adjusting member is installed on the connecting member, so that the height and angle of the support pad (38) can be adjusted.

2. The highly stable ergonomic office chair according to claim 1, characterized in that: Several support legs (2) are installed at equal intervals along the edge of the base (1). The end of the support leg (2) away from the base (1) is bent downward to support the base (1). A caster wheel (3) is installed at the bottom of the support leg (2).

3. The highly stable ergonomic office chair according to claim 1, characterized in that: The lifting component includes a cylinder (4), the bottom of which is fixed on a base (1), and a support seat (5) is installed on the top of the cylinder (4). A support frame (7) with an upwardly curved L-shape is installed on the top of the support seat (5). The top of the support frame (7) is connected to a support plate (8), and a cylinder switch (6) for adjusting the air intake and exhaust of the cylinder (4) is provided on the side of the support seat (5).

4. The highly stable ergonomic office chair according to claim 3, characterized in that: L-shaped rods (13) are provided on both sides of the support frame (7). One end of the L-shaped rod (13) is rotatably connected to the support frame (7) through a damping bearing. A handrail (17) is provided at the top of the L-shaped rod (13). A strip plate (16) is installed at the bottom of the handrail (17). A slide rail (15) is installed at the bottom of the strip plate (16). A slider (14) is slidably installed on the slide rail (15). The slider (14) is rotatably connected to the L-shaped rod (13) through a damping bearing.

5. A highly stable ergonomic office chair according to claim 3, characterized in that: The connector includes a strip seat (20), which is located on the side of the support mesh (19) away from the support plate (8). Each edge of the strip seat (20) is equipped with a support rod (21) with one end bent into an L shape. The other end of the support rod (21) is fixed to the corner of the support frame (18). An arc-shaped first connecting plate (22) is installed on the bottom of the strip seat (20). The concave surface of the first connecting plate (22) faces the seat cushion (9), and the other end of the first connecting plate (22) is fixed to the support plate (8). A second connecting plate (23) with an L-shaped top is provided on the side of the strip seat (20) away from the supporting mesh (19). The top of the second connecting plate (23) is fixed to the strip seat (20), and an arc-shaped third connecting plate (24) is installed at the bottom of the second connecting plate (23). The concave surface of the third connecting plate (24) is set towards the strip seat (20), and a fourth connecting plate (25) is installed at the bottom of the third connecting plate (24). The other end of the fourth connecting plate (25) is fixed to the support frame (7).

6. A highly stable ergonomic office chair according to claim 5, characterized in that: The first connecting plate (22), the second connecting plate (23), the third connecting plate (24), the fourth connecting plate (25), and the support rod (21) are all made of one of the following materials: reinforced nylon and modified PP.

7. A highly stable ergonomic office chair according to claim 5, characterized in that: A strip cavity (26) is provided at the top of the strip seat (20), and a lifting frame (27) is built into the strip cavity (26). A first locking bolt (28) is threaded on the top outer wall of the strip seat (20). The end of the first locking bolt (28) passes through the strip seat (20) and corresponds to the lifting frame (27). A second U-shaped seat (35) is connected to the top of the lifting frame (27). A second rotating shaft (36) is rotatably installed inside the second U-shaped seat (35). A second connecting seat (34) is installed on the second rotating shaft (36). A second torsion spring (37) is sleeved on the second rotating shaft (36). One end of the second torsion spring (37) is fixed to the second connecting seat (34), and the other end of the second torsion spring (37) is fixed to the second U-shaped seat (35). The other end of the second connecting seat (34) is connected to a first U-shaped seat (32). A second U-shaped seat (32) is rotatably installed inside the first U-shaped seat (32). There is a first rotating shaft (31), the axis of the first rotating shaft (31) is perpendicular to the axis of the second rotating shaft (36), and a first connecting seat (30) is installed on the first rotating shaft (31). An arc-shaped headrest (29) is installed on the end of the first connecting seat (30). The concave surface of the headrest (29) is set away from the first connecting seat (30). A first torsion spring (33) is sleeved on the first rotating shaft (31). One end of the first torsion spring (33) is fixed on the first connecting seat (30), and the other end of the first torsion spring (33) is fixed on the first U-shaped seat (32).

8. A highly stable ergonomic office chair according to claim 7, characterized in that: The headrest (29), seat cushion (9), and support pad (38) all include a reinforcing plate of corresponding shape, and the reinforcing plate is fixed in the sponge pad. A breathable mesh cover is wrapped around the outside of the sponge pad. The support plate (8) has multiple through holes (11) arranged at intervals, and a slot (10) is opened on the side of the support plate (8). The slot (10) penetrates the side of the support plate (8).

9. A highly stable ergonomic office chair according to claim 5, characterized in that: The adjusting component includes a fourth connecting seat (44), which is fixed on the middle of the fixed frame (43). The other side of the fourth connecting seat (44) is provided with a protective cover (45) with an opening on one side. The fourth connecting seat (44) is placed inside the protective cover (45), and a drive shaft (46) is installed on the fourth connecting seat (44). The end of the drive shaft (46) is rotatably connected to the inner wall of the protective cover (45). A drive component that drives the drive shaft (46) to rotate is installed at one end of the drive shaft (46). A ring-shaped fixing frame (53) is installed on the outer wall of the protective cover (45). The fixing frame (53) is fitted on the strip seat (20). On the other side of the fixing frame (53), there is a limiting plate (54) with the end bent into an L shape. The end of the limiting plate (54) is fixed to the strip seat (20). The fixing frame (53) is placed inside the limiting plate (54). A strip groove (55) is opened on the limiting plate (54). A second locking bolt (56) is installed in the strip groove (55). The second locking bolt (56) is threaded to the fixing frame (53). A ring-shaped pressure block (57) is fitted on the screw of the second locking bolt (56). One end of the pressure block (57) corresponds to the nut of the second locking bolt (56), and the other end of the pressure block (57) corresponds to the outer wall of the limiting plate (54). A limiting groove (58) is provided on the side of the fixed frame (53), and a strip-shaped limiting block (59) is built into the limiting groove (58). The limiting block (59) is fixed on the outer wall of the strip seat (20) along the length direction of the strip seat (20).

10. A highly stable ergonomic office chair according to claim 9, characterized in that: The driving component includes a first bevel gear (47), which is coaxially mounted on one end of a transmission shaft (46). A second bevel gear (48) meshes with the side of the first bevel gear (47). A drive shaft (49) is coaxially mounted on the second bevel gear (48). The end of the drive shaft (49) is fixed to the inner wall of the protective cover (45). A worm gear (50) is also coaxially mounted on the drive shaft (49). A worm (51) meshes with the worm gear (50). The end of the worm (51) passes through the protective cover (45) and is connected to a handle (52). The worm (51) is rotatably connected to the protective cover (45).

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