Mesh office chair

Abstract

The utility model discloses an office chair with a mesh surface. The office chair comprises a chair seat, a chair back, a headrest, two armrests and a base, the chair further comprises a supporting beam which is located on the back face of the chair back, the top of the supporting beam extends upwards, and the bottom of the supporting beam extends downwards to the position below the base. The headrest is connected with the top of the supporting beam, the bottom of the chair seat is connected with a connecting seat, the chair seat and the chair back are both of a frame double-layer structure, a gap is formed between the two layers, the supporting beam is provided with a plurality of waist supports, and the waist supports are located behind the second net face layer. The seat is additionally provided with the headrest, the headrest is fixed to the bottom of the base through the supporting beam, the supporting beam is also used for fixing the frame of the seat back, and therefore the seat back and the headrest can have the good supporting effect, and the spine of the human body can be better supported by the seat back through the added waist support.

Description

Technical Field

[0001] The utility model relates to the technical field of office and home furniture, in particular to a mesh office chair. Background Art

[0002] At present, there is a disclosed mesh office chair, which includes chair legs, a chair frame, a seat and a chair back arranged in sequence from bottom to top, the seat includes a seat frame and a mesh, the mesh is tautly installed on the upper edge of the seat frame, the chair back includes a back frame and a mesh, the mesh is tautly installed on the periphery of the back frame, and the two sides of the seat frame are hollowed out with staggered support rods. The mesh has the characteristics of good air permeability and good elasticity. When a person sits and leans on the mesh office chair, the mesh deforms with the weight of the human body's buttocks and back, and is comfortable to use. When the person's back leaves the back or the buttocks leave the seat, the mesh can automatically return to its original shape; after using it for a certain period of time, you only need to use a cleaning tool to wash the mesh to achieve the purpose of cleaning the mesh, and it is easy to clean. The mesh office chair of this structure has the following shortcomings: 1. Due to the structural limitations of the backrest, it is impossible to install a headrest. Even after installation, it can only move with the backrest, which makes the head feel uncomfortable and brings a bad experience to the user. 2. In addition, the armrest is also fixed to the backrest and can only move with the backrest, which brings a bad experience to the user. 3. The chair frame and backrest are single-layer frame structures. After installing the mesh, when the user sits on the mesh, it cannot provide better support. 4. The waist lacks support. The user's waist only relies on the mesh for support. After sitting for a long time, the lack of support increases the pressure on the spine for a long time, causing back pain. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a mesh office chair with an additional headrest, which is fixed to the bottom of the base through a support beam, and the support beam is also used to fix the frame of the chair back, so that the chair back and the headrest can have a better supporting effect. In addition, the seat and the chair back are both double-layer frame structures with a spacing between the two layers, so that they have a better supporting effect; the added lumbar support can make the chair back better support the human spine.

[0004] The technical solution of the utility model is to provide a mesh office chair with the following structure, including a seat, a chair back, a headrest, two armrests and a base; it is characterized in that it also includes a support beam, the support beam is located on the back of the chair back, the top of the support beam extends upward, and the bottom extends downward to below the base; the headrest is connected to the top of the support beam, the bottom of the seat is connected to a connecting seat, the connecting seat is connected to the bottom of the support beam, the seat and the chair back are both double-layer frame structures with a spacing between the two layers, the top layer of the seat frame is provided with a first mesh layer, and the bottom layer is fixed to the support beam; the front layer of the chair back frame is provided with a second mesh layer, and the back layer is fixed to the support beam; the support beam is provided with a plurality of lumbar supports, and the lumbar supports are located behind the second mesh layer.

[0005] A connecting head is provided on the back of the headrest, and the connecting head is connected to the support beam by bolts and the angle is adjustable; the axis of the rotating shaft of the connecting head is located on a horizontal plane.

[0006] The top of the support beam is higher than the top of the seat back, and the headrest is spaced apart from the seat back when adjusted to any angle.

[0007] The chair back has a double-layer frame structure with a spacing between the two layers, which means that the chair back includes a first annular frame, a first support rod and a second support plate. The first support rod and the second support plate are curved structures and are located on both sides of the support beam. The top is fixed to the top of the first annular frame, and the bottom is fixed to the bottom of the first annular frame. There is a spacing between the main body of the first support rod and the second support plate and the plane formed by the first annular frame. The first support rod and the second support plate are fixed to the support beam by multiple connecting rods.

[0008] The lumbar support includes an adjusting knob, a lumbar support, a connecting rod, a screw and a slider, the lumbar support is fixed to one end of the connecting rod, the other end of the connecting rod is fixed to the slider, the screw passes through the threaded hole of the slider, the connecting rod and the screw pass through the support beam, and the adjusting knob is fixed to the tail end of the screw, the adjusting knob is located on the back of the support beam, and the lumbar support is located on the front of the support beam, the screw is rotated to rotate the adjusting knob, and the forward or reverse rotation of the screw drives the slider to move forward and backward and causes the slider to push the lumbar support forward or backward.

[0009] The seat is a double-layer frame structure with a spacing between the two layers, which means that the seat includes a second annular frame and a base plate, the main body of the base plate is located below the second annular frame, and the front end and rear end of the base plate are fixedly connected to the second annular frame as a whole.

[0010] The two armrests are respectively fixed to the side surfaces of the bottom plate through an armrest fixing rod, wherein the armrest fixing rod is in a bent state and is spaced apart from the second annular frame.

[0011] The seat has a front-rear adjustment structure.

[0012] The armrest has adjustment structures in six directions: front and back, left and right, and up and down.

[0013] After adopting the above structure, the utility model has the following advantages: 1. By integrating an innovative support structure, the stability and ergonomic performance of the office chair are enhanced. Specifically, a reinforced support beam is cleverly integrated into the back of the chair back. Its unique design lies in its extension range - the top extends upward and the bottom extends downward to the bottom of the base, forming a stable vertical support system. The top of the support beam is closely connected to an adjustable headrest, ensuring that the user's head and neck can get customized support, reducing the pressure and discomfort caused by long working hours. At the same time, the bottom of the seat is connected to the connecting seat, which is further firmly combined with the bottom of the support beam to form a coherent mechanical link from the back to the base, ensuring the stability and strength of the entire chair structure. This integrated design not only strengthens the structural integrity of the chair, but also ensures that both the back and the headrest can obtain the best support effect. The backrest frame is directly fixed to the support beam, which means that no matter how the user adjusts the sitting posture, the backrest can provide reliable support, and the position of the headrest can also be adjusted according to personal needs to achieve the ideal support angle, thereby greatly improving the comfort and functionality of the office chair.

[0014] 2. The seat and the backrest are both double-layer frame structures with a spacing between the two layers. The top layer of the seat frame is provided with a first mesh layer, and the bottom layer is fixed to a support beam; the front layer of the backrest frame is provided with a second mesh layer, and the back layer is fixed to a support beam, so that the mesh layers of the seat and the backrest have more space to move backward and have a better supporting effect, and can withstand body weight while maintaining elasticity.

[0015] 3. The support beam is provided with a plurality of lumbar supports, and the lumbar supports are located behind the second mesh layer. The lumbar supports can help the user maintain a healthy sitting posture, help reduce the bad posture of lumbar lordosis or concavity, and avoid spinal pressure caused by improper sitting posture.

[0016] As an improvement, a connector is provided on the back of the headrest, and the connector is bolted to the support beam and the angle is adjustable; the axis of the rotating shaft of the connector is located on the horizontal plane, and the angle of the headrest is adjusted in the horizontal plane. The user can easily adjust the position of the headrest according to personal sitting habits and preferences to obtain the best neck and head support. The bolt connection ensures a stable connection between the headrest and the support beam. Even after the angle is adjusted, the headrest can remain in the set position and will not change the angle due to slight shaking in daily use, which improves the safety of use.

[0017] As an improvement, the top of the support beam is higher than the top of the chair back, and the headrest is spaced apart from the chair back when adjusted to any angle, so that the headrest has a larger adjustment range and can accommodate heads of different heights. Whether the user is sitting or half-lying, the headrest can provide precise support, enhancing the versatility and applicability of the chair.

[0018] As an improvement, the chair back is a double-layer frame structure with a spacing between the two layers, which means that the chair back includes a first annular frame, a first support rod and a second support plate. The first support rod and the second support plate are in a curved structure and are located on both sides of the support beam. The top is fixed to the top of the first annular frame, and the bottom is fixed to the bottom of the first annular frame. There is a spacing between the main body of the first support rod and the second support plate and the plane formed by the first annular frame. The first support rod and the second support plate are fixed to the support beam through a plurality of first connecting rods. The chair back provides a solid frame foundation to ensure the overall stability and structural integrity. The first connecting rod not only strengthens the connection between the various components and ensures the stability between the chair back and the support beam, but also allows a certain degree of flexibility, so that the chair back can maintain structural stability when subjected to force without losing comfort.

[0019] As an improvement, the lumbar support includes an adjustment knob, a lumbar support, a second connecting rod, a screw and a slider, the lumbar support is fixed to one end of the second connecting rod, the other end of the second connecting rod is fixed to the slider, the screw passes through the threaded hole of the slider, the second connecting rod and the screw pass through the support beam, and the adjustment knob is fixed to the tail end of the screw, the adjustment knob is located on the back of the support beam, and the lumbar support is located on the front of the support beam, the adjustment knob is turned to rotate the screw, and the screw forward or reverse rotation drives the slider to move forward or backward and the slider pushes the lumbar support forward or backward. The adjustment knob is located on the back of the support beam, which is convenient for the user to operate. It is used to manually control the rotation of the screw, so as to adjust the position of the lumbar support; the lumbar support is the part that directly contacts the user's waist, and is designed to support the lumbar region and reduce the pressure caused by sitting for a long time. The lumbar support is fixed to one end of the second connecting rod to ensure stability during the adjustment process. The connecting rod acts as a bridge, one end of which is fixed to the lumbar support and the other end is fixed to the slider. It transmits the movement of the lumbar support to the slider, thereby realizing the forward and backward movement of the lumbar support. The screw passes through the threaded hole of the slider, and when the adjustment knob is turned, the screw rotates with it. The threaded design of the screw allows its rotation to be converted into linear motion, pushing the slider to move along the axis of the screw. The slider has a threaded hole that matches the screw, so that it can move along the axis as the screw rotates. The movement of the slider drives the lumbar support through the connecting rod to achieve the front and back adjustment of the lumbar support. By turning the adjustment knob, the screw starts to rotate, and due to the thread matching between the slider and the screw, the slider moves axially on the screw. When the screw rotates forward, the slider moves forward, pushing the lumbar support toward the user, providing stronger lumbar support; conversely, when the screw rotates reversely, the slider moves backward, and the lumbar support moves away from the user, reducing the support strength. This design allows users to easily adjust the position and strength of the lumbar support according to personal needs to achieve the best sitting comfort.

[0020] As an improvement, the seat is a double-layer frame structure with a spacing between the two layers, which means that the seat includes a second annular frame and a base plate, the main body of the base plate is located below the second annular frame, and the front end and rear end of the base plate are fixedly connected to the second annular frame as a whole.

[0021] As an improvement, the two armrests are respectively fixed to the side of the bottom plate by an armrest fixing rod, and the armrest fixing rod is in a bent state and has a spacing with the second annular frame. The armrest fixing rod is a key component connecting the armrest and the bottom plate, and it is responsible for firmly fixing the armrest to the side of the chair to ensure the stability and safety of the user when leaning.

[0022] As an improvement, the seat has a front and rear adjustment structure, and the seat can be moved forward or backward according to different users.

[0023] As an improvement, the armrest has an adjustment structure in six directions: front and back, left and right, and up and down, so that it can be adjusted to suit the sitting posture and needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front schematic diagram of the mesh office chair of the present invention.

[0025] Figure 2 It is a schematic diagram of the back side of the mesh office chair of the present invention.

[0026] Figure 3 It is a schematic diagram of the split headrest of the utility model.

[0027] Figure 4 It is a back schematic diagram of the chair back of the utility model.

[0028] Figure 5 It is a front schematic diagram of the chair back of the utility model.

[0029] Figure 6 This is a schematic diagram of the installation of the waist support of the utility model.

[0030] Figure 7 It is a schematic diagram of the waist support of the utility model.

[0031] Figure 8 It is a schematic diagram of the second frame of the utility model.

[0032] As shown in the figure:

[0033] 1. Seat, 2. Chair back, 3. Headrest, 4. Armrest, 5. Base, 6. Support beam, 7. First mesh layer, 8. Second mesh layer, 9. Lumbar support, 10. Connector, 11. First annular frame, 12. First support rod, 13. Second support plate, 14. First connecting rod, 15. Adjustment knob, 16. Lumbar support, 17. Second connecting rod, 18. Screw, 19. Slider, 20. Second annular frame, 21. Bottom plate, 22. Armrest fixing rod. DETAILED DESCRIPTION

[0034] The utility model will be further described below in conjunction with the accompanying drawings.

[0035] like Figure 1-8As shown, the mesh office chair of the utility model includes a seat 1, a chair back 2, a headrest 3, two armrests 4 and a base 5; it is characterized in that it also includes a support beam 6, which is located on the back of the chair back 2, and the top of the support beam 6 extends upward and the bottom extends downward to the bottom of the base; the support beam 6 is one of the core structures of the entire chair, which is not only located on the back of the chair back 2, but also has its top extending upward to the headrest 3, and its bottom extending downward to the bottom of the base 5, forming a stable longitudinal support system to ensure the overall structural strength and stability of the chair.

[0036] like Figure 2 and Figure 3 As shown, the headrest 3 is connected to the top of the support beam 6. The headrest 3 is directly connected to the top of the support beam 6, which ensures the stability of the headrest 3 so that the user can adjust the position of the headrest 3 according to their own needs to provide better head and neck support.

[0037] The bottom of the seat 1 is connected to a connecting seat, which is connected to the bottom of the support beam 6. The seat 1 and the backrest 2 are both double-layer frame structures with a spacing between the two layers. The top layer of the seat 1 is provided with a first mesh layer 7, and the bottom layer is fixed to the support beam 6. The seat 1 adopts a double-layer frame structure with a spacing between the two layers. This design helps to improve the air permeability and elasticity of the seat. The top layer of the frame is covered with the first mesh layer 7, which provides a direct sitting experience for the user, while maintaining air circulation and reducing discomfort caused by long-term sitting.

[0038] The front frame of the chair back 2 is provided with a second mesh layer 8, and the back frame is fixed to the support beam 6; the support beam 6 is provided with a plurality of lumbar supports 9, and the lumbar supports 9 are located behind the second mesh layer 8. Similar to the seat 1, the chair back 2 also adopts a double-layer frame structure, with a gap between the two layers, and the front frame is covered with the second mesh layer 8. This design not only increases the comfort and breathability of the chair back, but also allows the chair back to fit naturally according to the back curve of the user, providing good support.

[0039] like Figure 3 As shown, a connector 10 is provided on the back of the headrest 3, and the connector 10 is connected to the support beam 6 by bolts and the angle is adjustable; the axis of the rotating shaft of the connector 10 is located on a horizontal plane. The headrest is adjusted in angle within the horizontal plane, and the user can easily adjust the position of the headrest according to personal sitting habits and preferences to obtain the best neck and head support. The bolt connection ensures a firm connection between the headrest and the support beam. Even after the angle is adjusted, the headrest can remain in the set position and will not change the angle due to slight shaking in daily use, thereby improving the safety of use.

[0040] The top of the support beam 6 is higher than the top of the chair back 2, and the headrest 3 is spaced apart from the chair back 2 when adjusted to any angle, so that the adjustment range of the headrest 3 is larger and can adapt to heads of different heights. Whether the user is sitting or half-lying, the headrest can provide precise support, thereby enhancing the versatility and applicability of the chair.

[0041] like Figure 5 As shown, the chair back 2 is a double-layer frame structure with a spacing between the two layers, which means that the chair back 2 includes a first annular frame 11, a first support rod 12 and a second support plate 13. The first support rod 12 and the second support plate 13 are in a curved structure and are located on both sides of the support beam 6. The top is fixed to the top of the first annular frame 11, and the bottom is fixed to the bottom of the first annular frame 11. There is a spacing between the body of the first support rod 12 and the second support plate 13 and the plane formed by the first annular frame 11. The first support rod 12 and the second support plate 13 are fixed to the support beam 6 through a plurality of first connecting rods 14. The chair back provides a solid frame foundation to ensure the overall stability and structural integrity. The first connecting rod 14 not only strengthens the connection between the various components and ensures the stability between the chair back and the support beam, but also allows a certain degree of flexibility, so that the chair back can maintain structural stability when subjected to force without losing comfort.

[0042] The lumbar support 9 includes an adjustment knob 15, a lumbar support 16, a second connecting rod 17, a screw 18 and a slider 19. The lumbar support 16 is fixed to one end of the second connecting rod 17, and the other end of the second connecting rod 17 is fixed to the slider 19. The screw 18 passes through the threaded hole of the slider 19. The second connecting rod 17 and the screw 18 pass through the support beam 6 and the adjustment knob 15 is fixed to the tail end of the screw 18. The adjustment knob 15 is located on the back of the support beam 6, and the lumbar support 16 is located on the front of the support beam 6. The screw 18 is rotated by turning the adjustment knob 15. The screw 18 is driven forward or reversed to move the slider 19 forward or backward and the slider 19 pushes the lumbar support 16 forward or backward. The adjustment knob is located on the back of the support beam for easy operation by the user. It is used to manually control the rotation of the screw to adjust the position of the lumbar support; the lumbar support is the part that directly contacts the user's waist and is designed to support the lumbar region and reduce the pressure caused by sitting for a long time. The lumbar support is fixed to one end of the connecting rod to ensure stability during the adjustment process. The connecting rod acts as a bridge, with one end fixed to the lumbar support and the other end fixed to the slider. It transmits the movement of the lumbar support to the slider, thereby realizing the forward and backward movement of the lumbar support. The screw passes through the threaded hole of the slider, and when the adjustment knob is turned, the screw rotates with it. The threaded design of the screw allows its rotation to be converted into linear motion, pushing the slider to move along the axis of the screw. The slider has a threaded hole that matches the screw, allowing it to move along the axis as the screw rotates. The movement of the slider drives the lumbar support through the connecting rod to achieve the forward and backward adjustment of the lumbar support. By turning the adjustment knob, the screw starts to rotate, and due to the threaded fit between the slider and the screw, the slider moves axially on the screw. When the screw rotates forward, the slider moves forward, pushing the lumbar support toward the user, providing stronger lumbar support; conversely, when the screw rotates backward, the slider moves backward, and the lumbar support moves away from the user, reducing the support strength. This design allows users to easily adjust the position and strength of the lumbar support according to personal needs to achieve the best sitting comfort.

[0043] like Figure 8 As shown, the seat 1 is a double-layer frame structure with a spacing between the two layers, which means that the seat 1 includes a second annular frame 20 and a bottom plate 21. The main body of the bottom plate 21 is located below the second annular frame 20, and the front end and rear end of the bottom plate 21 are fixedly connected to the second annular frame 20 as a whole. The second annular frame constitutes the outer edge of the seat 1. It is a closed frame that provides peripheral structural support for the seat. The design of this annular frame not only enhances the overall stability of the seat. The front end and rear end of the bottom plate are fixedly connected to the second annular frame as a whole. This connection method ensures the stability between the bottom plate and the annular frame, and can maintain the integrity and stability of the seat structure even when bearing weight.

[0044] like Figure 8As shown, the two armrests 4 are fixed to the side of the bottom plate 21 by an armrest fixing rod 22 respectively. The armrest fixing rod 22 is in a bent state and is spaced apart from the second annular frame 20. The existence of the space prevents the arm from directly pressing the frame of the seat when it is placed on the armrest, providing a more spacious and natural support position. The bent shape can ensure that the armrest is at an appropriate height and angle, so that the arm can be placed on it naturally, reducing muscle tension during long-term use. Maintaining a certain distance also helps to reduce the mutual influence between the armrest fixing rod and the seat frame, ensuring the structural independence and stability of each.

[0045] The seat 1 has a front-to-back adjustment structure and can be moved forward and backward along its track or bracket to adapt to the body shape and sitting posture preferences of different users.

[0046] The armrest 4 has an adjustment structure in eight directions, including front and back, left and right, up and down, and horizontal rotation. Front and back adjustment: The armrest is allowed to move along the front and back direction of the seat to adapt to arms of different lengths or sitting depths, ensuring that the arms can be placed naturally in a relaxed state. Left and right adjustment (width adjustment): The armrest can be moved inward or outward to adapt to users with different shoulder widths, ensuring that the arms are parallel to the body when resting, reducing the pressure on the shoulders. Up and down adjustment: The armrest is height-adjustable, allowing users to adjust according to the length of their arms or the height of the workbench, ensuring that the arms can be easily placed on the armrests when the elbows are bent about 90 degrees, reducing tension in the shoulders and neck. Horizontal rotation: The armrest can rotate around its axis in the horizontal plane, which helps to adapt to working or reading postures in different directions. For example, when you need to use a keyboard or mouse, you can rotate the armrest to the most suitable angle.

[0047] The headrest 3 has an up and down adjustment structure and a support angle adjustment structure. The up and down adjustment structure: the up and down adjustment structure allows the headrest to move in the vertical direction to accommodate users of different heights and sitting postures. By adjusting the height of the headrest, it can be ensured that it can accurately support the user's neck and head, avoiding neck and shoulder pain caused by improper position of the headrest. This adjustment is usually completed through an adjustment mechanism located on the back of the headrest. The user can adjust the height of the headrest through simple operations such as pressing a button or turning a knob. Support angle adjustment structure: the support angle adjustment structure enables the headrest to adjust its inclination angle within a certain range to accommodate the user's head inclination and sitting posture requirements.

Claims

1. A mesh office chair, comprising a seat (1), a chair back (2), a headrest (3), two armrests (4) and a base (5); characterized in that: It also includes a support beam (6), the support beam (6) is located on the back of the chair back (2), the top of the support beam (6) extends upwards, and the bottom extends downwards to below the base; The headrest (3) is connected to the top of the support beam (6); the bottom of the seat (1) is connected to a connecting seat, and the connecting seat is connected to the bottom of the support beam (6); the seat (1) and the backrest (2) are both double-layer frame structures with a spacing between the two layers; the top layer of the seat (1) is provided with a first mesh layer (7), and the bottom layer is fixed to the support beam (6); the front layer of the backrest (2) is provided with a second mesh layer (8), and the back layer is fixed to the support beam (6); the support beam (6) is provided with a plurality of lumbar supports (9), and the lumbar supports (9) are located behind the second mesh layer (8).

2. The mesh office chair according to claim 1, characterized in that: A connecting head (10) is provided on the back of the headrest (3); the connecting head (10) is connected to the support beam (6) by bolts and the angle is adjustable; the axis of the rotating shaft of the connecting head (10) is located on a horizontal plane.

3. The mesh office chair according to claim 1 or 2, characterized in that: The top of the support beam (6) is higher than the top of the chair back (2), and the headrest (3) is spaced apart from the chair back (2) when adjusted to any angle.

4. The mesh office chair according to claim 1, characterized in that: The chair back (2) is a double-layer frame structure with a spacing between the two layers, which means that the chair back (2) includes a first annular frame (11), a first support rod (12) and a second support plate (13); the first support rod (12) and the second support plate (13) are in a curved structure and are located on both sides of a support beam (6); the top is fixed to the top of the first annular frame (11) and the bottom is fixed to the bottom of the first annular frame (11); a spacing is provided between the body of the first support rod (12) and the second support plate (13) and the plane formed by the first annular frame (11); the first support rod (12) and the second support plate (13) are fixed to the support beam (6) via a plurality of first connecting rods (14).

5. The mesh office chair according to claim 1, characterized in that: The lumbar support (9) comprises an adjusting knob (15), a lumbar support (16), a second connecting rod (17), a screw rod (18) and a slider (19); the lumbar support (16) is fixed to one end of the second connecting rod (17); the other end of the second connecting rod (17) is fixed to the slider (19); the screw rod (18) passes through a threaded hole of the slider (19); the second connecting rod (17) and the screw rod (18) pass through a support beam (6); and the adjusting knob (15) is fixed to the tail end of the screw rod (18); the adjusting knob (15) is located on the back side of the support beam (6); the lumbar support (16) is located on the front side of the support beam (6); rotating the adjusting knob (15) causes the screw rod (18) to rotate; the forward or reverse rotation of the screw rod (18) drives the slider (19) to move forward or backward and causes the slider (19) to push the lumbar support (16) to move forward or backward.

6. The mesh office chair according to claim 1, characterized in that: The seat (1) is a double-layer frame structure with a spacing between the two layers, which means that the seat (1) comprises a second annular frame (20) and a bottom plate (21), the main body of the bottom plate (21) is located below the second annular frame (20), and the front end and the rear end of the bottom plate (21) are fixedly connected to the second annular frame (20) as a whole.

7. The mesh office chair according to claim 6, characterized in that: The two handrails (4) are respectively fixed to the side of the bottom plate (21) via a handrail fixing rod (22), wherein the handrail fixing rod (22) is in a bent state and is spaced apart from the second annular frame (20).

8. The mesh office chair according to claim 1, characterized in that: The seat (1) has a front-to-back adjustment structure, and the seat (1) can be moved forward or backward according to different users.

9. The mesh office chair according to claim 7, characterized in that: The armrest (4) has an adjustment structure capable of rotating in eight directions, namely, front and back, left and right, up and down, and in the horizontal plane.

10. The mesh office chair according to claim 2, characterized in that: The headrest (3) has an up and down adjustment structure and a support angle adjustment structure.

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