Multifunctional chair seat

Abstract

The utility model provides a multifunctional chair seat which comprises two structural forms, one chair seat comprises a seat frame, mesh cloth arranged at an opening at the upper end of the seat frame and an adjusting air bag arranged in the seat frame, and the adjusting air bag can be inflated to expand and act on the mesh cloth and can also be deflated to contract and be separated from the mesh cloth; the other chair seat comprises a seat plate and a cushion connected to the upper end of the seat plate, the cushion comprises an outer sleeve and an adjusting air bag arranged in the outer sleeve, and the adjusting air bag can expand or contract through inflation and deflation so as to change the supporting hardness of the cushion. The two types of seats meet the requirements of seated persons in different states; when a seated person has a rest, the mesh cloth or the cushion can elastically support the seated person, and when the seated person works, the adjusting air bag can expand and form a longitudinal jacking effect on the seated person, so that the seated person correctly keeps an upright posture during working, and the use experience of the seat is improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, and particularly relates to a multifunctional seat cushion. Background Art

[0002] The existing office chairs or ergonomic chairs usually have two types of seat cushions: mesh seat cushions and cotton seat cushions. For mesh seat cushions, elastic mesh fabrics are usually arranged on the seat frames. For cotton seat cushions, soft seat pads are usually provided on the seat boards. Both of these two types of seat cushions have good elasticity and can form comfortable elastic supports for the buttocks of the sitters.

[0003] In the actual use of seats, when the sitter is working at a desk or resting, there are two states on the seat cushion. When the sitter is working at a desk, the upper body needs to stand upright. When the sitter is resting, the upper body will lean backward and rest on the backrest. However, in the existing office chairs or ergonomic chairs, after the elastic mesh fabric or seat pad is subjected to the sitting force of the buttocks, it will sink under the pressure. This can provide a comfortable sitting feeling when the sitter is resting, but when the sitter is working at a desk and the upper body needs to remain upright, the mesh fabric or seat pad will still sink inward when sitting on the seat cushion, making it difficult for the sitter to keep the upper body in an upright state. In the long run, the lower half of the spine will be under too much pressure, which will have an adverse impact on the health of the sitter. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a multifunctional seat cushion. By arranging an adjustable airbag in the seat frame that can be inflated or deflated, the needs of sitters in different states are met. When the sitter is resting, the mesh fabric can form an elastic support for the sitter. When the sitter is working, the adjustable airbag can be inflated and act on the mesh fabric to form a longitudinal lifting effect on the sitter, reducing the pressure on the spine of the sitter when working at a desk and enabling the sitter to maintain an upright posture.

[0005] Furthermore, another multifunctional seat cushion is provided. By arranging an adjustable airbag in the seat pad at the upper end of the seat board that can be inflated or deflated, the needs of sitters in different states are met. When the sitter is resting, the seat pad is relatively soft and can form an elastic support for the sitter. When the sitter is working, the adjustable airbag can be inflated and change the hardness of the seat pad, and form a longitudinal lifting effect on the sitter, reducing the pressure on the spine of the sitter when working at a desk and enabling the sitter to maintain an upright posture.

[0006] The technical solution of the utility model is realized as follows:

[0007] A multifunctional seat cushion, comprising:

[0008] A seat frame, the seat frame is a hollow structure, and the upper end of the seat frame is open;

[0009] A mesh fabric is provided at the upper opening of the seat frame;

[0010] An adjustment airbag is provided inside the seat frame; the adjustment airbag can expand itself by inflating and act on the mesh fabric, or can contract itself by deflating and separate from the mesh fabric;

[0011] The seat has a soft support mode and a hard support mode. When the seat is in the soft support mode, the adjustment airbag is in a contracted state or not fully inflated. At this time, the mesh fabric can sink into the seat frame when receiving the sitting force; when the seat switches to the hard support mode, the adjustment airbag expands and acts on the mesh fabric to limit the mesh fabric from sinking into the seat frame; when the adjustment airbag contracts by deflating and separates from the mesh fabric, the seat switches back to the soft support mode again.

[0012] Preferably, the adjustment airbag includes two side airbags and a rear airbag. The two side airbags are respectively provided on the left and right sides inside the seat frame, and the rear airbag is provided at the rear side position inside the seat frame; the two side airbags and a rear airbag form a U-shaped flexible support area, which can just correspond to the hip positions and buttock positions of the sitter on both sides, and can provide a comfortable lifting feeling for the sitter when inflated.

[0013] Preferably, the side airbags on the left and right sides and the rear airbag are all connected through a connecting pipe; when the sitter slightly moves the body, the air in the side airbags and the rear airbag will flow to each other, so that the pressure in the side airbags and the rear airbag remains the same.

[0014] Preferably, an air inflation and deflation pump for inflating and deflating the adjustment airbag is provided inside the seat frame, and the air inflation and deflation pump is connected to one of the connecting pipes through an air pipe; so that the two side airbags and the rear airbag can be inflated and deflated simultaneously, thereby acting on the mesh fabric or separating from the mesh fabric.

[0015] Preferably, the connecting pipe between one of the side airbags and the rear airbag is a split pipe, and the split pipe includes a first branch pipe and a second branch pipe respectively connected to the corresponding side airbag and rear airbag, and the first branch pipe, the second branch pipe and the air pipe are connected through a three-way joint.

[0016] Preferably, a control switch electrically connected to the air inflation and deflation pump is provided outside the seat frame; the control switch is convenient for the sitter to inflate and deflate the adjustment airbag according to his own use needs, and complete the switching between the soft support and hard support modes.

[0017] Preferably, the adjustment airbag is a single airbag provided inside the seat frame, and the single airbag acts on or separates from the mesh fabric by its own expansion or contraction, so that the seat switches between the hard support mode and the soft support mode; the single airbag can act on the entire mesh fabric to keep the sitter's posture upright.

[0018] Preferably, when the seat is in the soft support mode and no sitting force is applied to the seat, the mesh fabric remains taut at the initial height position. When the mesh fabric is subjected to a sitting force, the mesh fabric sags into the seat frame. When the seat is subjected to a sitting force and switches from the soft support mode to the hard support mode, the adjustment airbag inflates and acts on the mesh fabric subjected to the sitting force, causing the sunken part of the mesh fabric to gradually rise to the initial height position or rise above the initial height position, preventing health problems caused by poor sitting postures of the sitter.

[0019] Preferably, an air charging and discharging pump for inflating and deflating the adjustment airbag is provided inside the seat frame, and the air charging and discharging pump is connected to the adjustment airbag through a trachea.

[0020] A multifunctional seat includes:

[0021] A seat board, which is a support member of the seat;

[0022] A seat cushion, connected to the upper end of the seat board; the seat cushion includes an outer cover and an adjustment airbag arranged inside the outer cover. The adjustment airbag can expand or contract itself by inflating and deflating to change the support hardness of the seat cushion;

[0023] The seat has a soft support mode and a hard support mode. When the seat is in the soft support mode, the adjustment airbag is in an unfilled state, and at this time the support hardness of the seat cushion is in a lower state; when the seat switches to the hard support mode, the adjustment airbag continuously expands by inflating, so that the support hardness of the seat cushion is converted to a higher state; when the adjustment airbag contracts by deflating, the seat switches back to the soft support mode again.

[0024] Preferably, a soft pad covering the upper end of the adjustment airbag is provided inside the outer cover; the soft pad can provide a comfortable sitting feeling for the sitter.

[0025] Preferably, the adjustment airbag inside the outer cover includes two side airbags and one rear airbag. The two side airbags are respectively located on the left and right sides of the seat board, and the rear airbag is located at the rear side position of the seat board; the two side airbags and one rear airbag form a U-shaped flexible support area, which can just correspond to the hip positions and buttock positions on both sides of the sitter, and can provide a comfortable lifting feeling for the sitter when inflated.

[0026] Preferably, the side airbags on the left and right sides and the rear airbag are all connected through a connecting pipe; when the sitter slightly moves the body, the air in the side airbags and the rear airbag will flow to each other, so that the pressures in the side airbags and the rear airbag are kept the same.

[0027] Preferably, an air charging and discharging pump for inflating and deflating the adjustment airbag is provided at the bottom end of the seat board, and the air charging and discharging pump is connected to one of the connecting pipes through a trachea penetrating into the outer cover.

[0028] Preferably, a control switch electrically connected to the air charging and discharging pump is provided outside the seat board; the control switch facilitates the sitter to charge and discharge the adjusting airbag according to their own usage requirements, and complete the switching between the soft support and hard support modes.

[0029] Preferably, the adjusting airbag is a single airbag arranged inside the outer sleeve. The single airbag changes the support hardness of the seat cushion by its own expansion or contraction, so as to switch the seat between the hard support mode and the soft support mode; the single airbag can act on the entire seat surface of the seat cushion to keep the sitter's posture upright.

[0030] Preferably, an air charging and discharging pump for charging and discharging the adjusting airbag is provided at the bottom end of the seat board, and the air charging and discharging pump is connected to the adjusting airbag through a trachea penetrating into the outer sleeve.

[0031] Preferably, when the seat is in the soft support mode and the seat is not subjected to a sitting force, the seat surface of the seat cushion remains flat at the initial height; when the seat cushion is subjected to a sitting force, the seat surface sinks downward; when the seat is subjected to a sitting force and switches from the soft support mode to the hard support mode, the adjusting airbag expands, so that the sunken part of the seat surface gradually rises upward to the initial height position or exceeds the initial height position upward; preventing health problems caused by the sitter's poor sitting posture.

[0032] The beneficial effects of the utility model adopting the above technical scheme are as follows:

[0033] 1. When the sitter is resting, the mesh fabric will sink and provide comfortable support for him. When the sitter is resting, the adjusting airbag arranged in the seat frame can expand after being inflated and act on the mesh fabric, so that the supporting feeling of the mesh fabric is enhanced, and the sunken part of the mesh fabric will gradually return upward, preventing the buttocks from sinking downward into the seat frame, enabling the sitter to maintain an upright posture correctly during work, meeting the usage requirements of the sitter in different states, reducing the pressure on the spine when the sitter is working at a desk, and improving the use experience of the seat.

[0034] 2. The adjusting airbag is composed of two side airbags distributed on the side parts of the seat frame and a rear airbag distributed on the rear part of the seat frame. This design can form corresponding flexible suspension supports for the sitter's hip positions and buttock positions on both sides when enhancing the supporting feeling of the mesh fabric, taking into account the comfort of sitting while keeping the sitter's posture upright.

[0035] 3. The side airbag and the rear airbag are interconnected. Even if the sitter slightly moves the body while maintaining an upright posture, the air between the side airbag and the rear airbag will flow to each other, so that the supporting force at each place within the supporting area of the adjusting airbag remains the same, thus keeping the sitter's posture continuously upright without falling. Description of the Drawings

[0036] Figure 1Schematic diagram of the structure for stretching the mesh fabric on the seat frame;

[0037] Figure 2 Schematic diagram of the internal structure of the seat frame after the mesh fabric is hidden;

[0038] Figure 3 Cross-sectional view of the effect of the adjusting airbag on the mesh fabric after inflation;

[0039] Figure 4 Cross-sectional view of the adjusting airbag contracting and separating from the mesh fabric;

[0040] Figure 5 Connection structure diagram of the adjusting airbag and the air charging and discharging pump;

[0041] Figure 6 Cross-sectional view of a single airbag inflating in the seat frame;

[0042] Figure 7 Schematic diagram of the structure of the multi-functional chair seat in Embodiment 2;

[0043] Figure 8 Cross-sectional view of the adjusting airbag inflating in Embodiment 2;

[0044] Figure 9 Cross-sectional view of a single adjusting airbag inflating in Embodiment 2;

[0045] Figure 10 Schematic diagram of the adjusting airbag correcting the sitting posture of the sitter to an upright state;

[0046] Each reference numeral is: 1 - seat frame, 2 - mesh fabric, 3 - adjusting airbag, 4 - air charging and discharging pump, 5 - air pipe, 6 - control switch, 7 - seat board, 8 - outer cover, 11 - cavity, 31 - side airbag, 32 - rear airbag, 33 - connecting pipe, 33a - first branch pipe, 33b - second branch pipe, 51 - three-way joint, 81 - soft pad. Detailed implementation manners

[0047] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0048] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0049] As Figures 1-10 shown, the present invention has multiple embodiments, and the specific implementation manners are as follows:

[0050] Example 1: As Figures 1-6 , Figure 10 shown, this example provides a multifunctional seat, including:

[0051] A seat frame 1, the seat frame 1 is a hollow structure, and the upper end of the seat frame 1 is open, and an upwardly open cavity 11 is formed inside the seat frame 1;

[0052] A mesh fabric 2, arranged at the upper opening of the seat frame 1, so that when the mesh fabric 2 is subjected to a sitting force, the mesh fabric 2 can sink and deform inside the cavity 11;

[0053] An adjusting airbag 3, arranged inside the seat frame 1; the adjusting airbag 3 can expand itself by inflating and act on the mesh fabric 2, and can also contract itself by deflating and separate from the mesh fabric 2;

[0054] The seat has a soft support mode and a hard support mode, and the soft support mode and the hard support mode can be freely switched according to the usage needs of the sitter; when the seat is in the soft support mode, the adjusting airbag 3 is in a contracted state or not fully inflated state, at this time the mesh fabric 2 can sink into the seat frame 1 when subjected to a sitting force; when the seat is switched to the hard support mode, the adjusting airbag 3 expands and acts on the mesh fabric 2 to limit the mesh fabric 2 from sinking into the seat frame 1; when the adjusting airbag 3 contracts by deflating and separates from the mesh fabric 2, the seat switches back to the soft support mode again.

[0055] Furthermore, in order to fit the sitter's buttocks and the hip positions on both sides as much as possible, the adjusting airbag 3 includes two side airbags 31 and one rear airbag 32. The two side airbags 31 are respectively arranged on the left and right sides inside the seat frame 1, and the rear airbag 32 is arranged at the rear position inside the seat frame 1; the two side airbags 31 on both sides and one rear airbag 32 form a U-shaped flexible support area, which can just correspond to the hip positions and buttock positions on both sides of the sitter, and can form a flexible floating support for the corresponding positions when inflated, providing a comfortable lifting feeling for the sitter.

[0056] Furthermore, in order to make the pressure in all airbags the same, the side airbags 31 on the left and right sides and the rear airbag 32 are all connected by a connecting pipe 33; when the sitter moves slightly, the air in the side airbags 31 and the rear airbag 32 will flow to each other, so that the pressure in the side airbags 31 and the rear airbag 32 remains the same, preventing the sitter's sitting posture from changing badly again due to different airbag pressures when standing upright; that is to say, when the user leans left or right, the air between the side airbags 31 and the rear airbag 32 will flow adaptively, and there will be no phenomenon of one side being high and the other side being low, so as to adapt to the user's sitting posture of leaning left or right and reduce the pressure on the spine.

[0057] Furthermore, the adjustment airbag 3 expands or contracts by inflating and deflating. In this embodiment, an inflation and deflation pump 4 for inflating and deflating the adjustment airbag 3 is provided in the seat frame 1. The inflation and deflation pump 4 is connected to one of the connecting pipes 33 through an air pipe 5, enabling the two side airbags 31 and the rear airbag 32 to inflate and deflate simultaneously, thereby acting on the mesh fabric 2 synchronously or separating from the mesh fabric 2 synchronously.

[0058] Furthermore, the adjustment airbag 3 is connected to the inflation and deflation pump 4 in the following manner: The connecting pipe 33 of one of the side airbags 31 and the rear airbag 32 is a split pipe, which includes a first split pipe 33a and a second split pipe 33b respectively connected to the corresponding side airbag 31 and rear airbag 32. The first split pipe 33a, the second split pipe 33b, and the air pipe 5 are connected through a three-way joint 51.

[0059] Furthermore, to facilitate the switching of the seat between the soft support and hard support modes, a control switch 6 electrically connected to the inflation and deflation pump 4 is provided outside the seat frame 1. The control switch 6 enables the sitter to inflate and deflate the adjustment airbag 3 according to their own usage requirements, completing the switching between the soft support and hard support modes.

[0060] Furthermore, in this embodiment, in addition to setting the adjustment airbag 3 as three split airbags at different positions, the adjustment airbag 3 can also be a single airbag provided in the seat frame 1. When the single airbag is connected to the inflation and deflation pump 4, the inflation and deflation pump 4 is directly connected to the adjustment airbag 3 through an air pipe 5. The single airbag acts on or separates from the mesh fabric 2 through its own expansion or contraction, thereby enabling the seat to switch between the hard support mode and the soft support mode. The single airbag can act on the entire mesh fabric 2 to keep the sitter's posture upright.

[0061] Furthermore, as Figure 10 shown, the seat can adjust the sitter's incorrect sitting posture during work to the correct sitting posture. The specific adjustment process is as follows: When the seat is in the soft support mode and the seat is not subject to a sitting force, the mesh fabric 2 remains taut at the initial height position. The initial height refers to the height of the mesh fabric 2 from the ground when it remains undeformed. When the mesh fabric 2 is subject to a sitting force, the mesh fabric 2 sags into the seat frame 1. When the seat is subject to a sitting force and switches from the soft support mode to the hard support mode, the adjustment airbag 3 expands and acts on the mesh fabric 2 subject to the sitting force, causing the sagging part of the mesh fabric 2 to gradually rise to the initial height position or rise above the initial height position. At this time, the support hardness of the mesh fabric 2 after being pressed by the adjustment airbag 3 increases, so that even when subject to a sitting force, it will no longer deform downward, preventing health problems caused by the sitter's poor sitting posture.

[0062] Embodiment 2: As Figures 7-9As shown in the figure, the difference between this embodiment and the above embodiment is that in this embodiment, a multifunctional seat is provided. The structure of this seat is different from that of the seat in the above embodiment. It is a structure of a plate member plus a cotton seat, and specifically includes:

[0063] A seat board 7, and the seat board 7 is a support member of the seat;

[0064] A seat cushion, which is connected to the upper end of the seat board 7; the seat cushion includes an outer cover 8 and an adjustable airbag 3 arranged inside the outer cover 8. The adjustable airbag 3 can expand or contract itself by inflating and deflating to change the support hardness of the seat cushion;

[0065] The seat has a soft support mode and a hard support mode. When the seat is in the soft support mode, the adjustable airbag 3 is in an unfilled state, and at this time, the support hardness of the seat cushion is in a lower state; when the seat switches to the hard support mode, the adjustable airbag 3 continuously expands by inflating, so that the support hardness of the seat cushion is converted to a higher state; when the adjustable airbag 3 contracts by deflating, the seat switches back to the soft support mode again.

[0066] Furthermore, a soft pad 81 covering the upper end of the adjustable airbag 3 is arranged inside the outer cover 8; the soft pad 81 can provide a comfortable sitting feeling for the sitter.

[0067] Furthermore, in order to fit the sitter's buttocks and the hip positions on both sides as much as possible, the adjustable airbag 3 inside the outer cover 8 includes two side airbags 31 and a rear airbag 32. The two side airbags 31 are respectively located on the left and right sides of the seat board 7, and the rear airbag 32 is located at the rear position of the seat board 7; the two side airbags 31 on both sides and a rear airbag 32 form a U-shaped flexible support area, which can just correspond to the hip positions and buttock positions on both sides of the sitter, and can provide a comfortable lifting feeling for the sitter when inflated.

[0068] Furthermore, in order to make the pressures in all the airbags the same, the two side airbags 31 on the left and right sides and the rear airbag 32 are all connected through a connecting pipe 33; when the sitter moves slightly, the air in the side airbags 31 and the rear airbag 32 will flow mutually, so that the pressures in the side airbags 31 and the rear airbag 32 are kept the same, preventing the sitter's sitting posture from changing badly again due to different airbag pressures when standing upright; that is to say, when the user leans left or right, the air between the side airbags 31 and the rear airbag 32 will flow adaptively, and there will be no phenomenon of one side being high and the other side being low, so as to adapt to the user's sitting posture of leaning left or right and reduce the pressure on the spine.

[0069] Furthermore, the seat board 7 in this embodiment is not a hollow structure. Therefore, an air charging and discharging pump 4 for inflating and deflating the adjusting airbag 3 is provided at the bottom of the seat board 7. The air charging and discharging pump 4 is connected to one of the connecting pipes 33 through an air pipe 5 penetrating into the outer sleeve 8, so that the side airbag 31 and the rear airbag 32 can be inflated and deflated simultaneously and act on the seat surface of the cushion at the same time.

[0070] Furthermore, a control switch 6 electrically connected to the air charging and discharging pump 4 is provided outside the seat board 7; the control switch 6 facilitates the sitter to inflate and deflate the adjusting airbag 3 according to their own usage requirements, and complete the switching between the soft support mode and the hard support mode.

[0071] Furthermore, in this embodiment, in addition to setting the adjusting airbag 3 as three separate airbags at different positions, the adjusting airbag 3 can also be a single airbag arranged in the outer sleeve 8. When the single airbag is connected to the air charging and discharging pump 4, the air charging and discharging pump 4 is directly connected to the adjusting airbag 3 through an air pipe 5 penetrating into the outer sleeve 8; the single airbag changes the support hardness of the cushion by its own expansion or contraction, so as to switch the seat between the hard support mode and the soft support mode; the single airbag can act on the entire seat surface of the cushion to keep the sitter's posture upright.

[0072] Furthermore, the seat can adjust the sitter's wrong sitting posture during work to the correct sitting posture, and the specific adjustment process is as follows: When the seat is in the soft support mode and the seat is not subject to the sitting force, the seat surface of the cushion remains flat at the initial height; when the cushion is subject to the sitting force, the seat surface sinks downward; when the seat is subject to the sitting force and switches from the soft support mode to the hard support mode, the adjusting airbag 3 expands, so that the sunken part of the seat surface gradually rises to the initial height position or rises above the initial height position; at this time, the support hardness of the seat surface of the cushion after being pressed by the adjusting airbag 3 will become larger, and even if it is subject to the sitting force, it will no longer deform downward, preventing health problems caused by the sitter's poor sitting posture.

[0073] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments to this technical solution without creative work without departing from the creative purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A multifunctional chair seat, characterized in that: include: A seat frame (1), the seat frame (1) being a hollow structure, and the upper end of the seat frame (1) being open; A mesh cloth (2) is arranged at the upper opening of the seat frame (1); An adjustable airbag (3) is arranged in the seat frame (1); the adjustable airbag (3) can expand itself and act on the mesh (2) by being inflated, and can also shrink itself and separate from the mesh (2) by being deflated; The seat has a soft support mode and a hard support mode. When the seat is in the soft support mode, the regulating airbag (3) is in a contracted state or an unfilled state. At this time, the mesh (2) can sink into the seat frame (1) when subjected to a sitting force. When the seat is switched to the hard support mode, the regulating airbag (3) expands and acts on the mesh (2) to limit the mesh (2) from sinking into the seat frame (1). When the regulating airbag (3) contracts by deflation and separates from the mesh (2), the seat is switched back to the soft support mode.

2. A multifunctional chair seat according to claim 1, characterized in that: The regulating airbag (3) comprises two side airbags (31) and a rear airbag (32); the two side airbags (31) are respectively arranged on the left and right sides of the seat frame (1); and the rear airbag (32) is arranged at the rear side of the seat frame (1).

3. A multifunctional chair seat according to claim 2, characterized in that: The side airbags (31) and the rear airbag (32) on the left and right sides are connected via a connecting pipe (33).

4. The multifunctional chair seat according to claim 3, characterized in that: An air pump (4) for inflating and deflation of the regulating air bag (3) is arranged in the seat frame (1). The air pump (4) is connected to one of the connecting pipes (33) via an air pipe (5).

5. The multifunctional chair seat according to claim 4, characterized in that: A connecting pipe (33) between one of the side airbags (31) and the rear airbag (32) is a split pipe, the split pipe comprising a first branch pipe (33a) and a second branch pipe (33b) respectively connected to the corresponding side airbag (31) and the rear airbag (32), and the first branch pipe (33a), the second branch pipe (33b) and the air pipe (5) are connected via a three-way joint (51).

6. The multifunctional chair seat according to claim 4, characterized in that: A control switch (6) electrically connected to the inflation and deflation air pump (4) is provided outside the seat frame (1).

7. The multifunctional chair seat according to claim 1, characterized in that: The adjustment airbag (3) is a single airbag arranged in the seat frame (1), and the single airbag acts on or separates from the mesh cloth (2) by expanding or contracting itself, thereby switching the seat between a hard support mode and a soft support mode.

8. A multifunctional chair seat according to claim 2 or 7, characterized in that: When the seat is in the soft support mode and is not subjected to a sitting force, the mesh (2) remains taut at the initial height position; when the mesh (2) is subjected to a sitting force, the mesh (2) sinks into the seat frame (1); when the seat is subjected to a sitting force and switches from the soft support mode to the hard support mode, the regulating airbag (3) expands and acts on the mesh (2) subjected to the sitting force, so that the sunken part of the mesh (2) is gradually lifted upward to the initial height position or exceeds the initial height position.

9. The multifunctional chair seat according to claim 7, characterized in that: An air pump (4) for inflating and deflating the regulating air bag (3) is arranged in the seat frame (1); the air pump (4) is connected to the regulating air bag (3) via an air pipe (5).

10. A multifunctional chair seat, characterized in that: include: A seat plate (7), the seat plate (7) being a support member for the seat; A seat cushion connected to the upper end of the seat plate (7); the seat cushion comprises a cover (8) and an adjustable airbag (3) arranged in the cover (8); the adjustable airbag (3) can expand or contract itself by inflating or deflating air to change the support hardness of the seat cushion; The seat has a soft support mode and a hard support mode. When the seat is in the soft support mode, the regulating airbag (3) is in an unfilled state, and the support hardness of the seat cushion is in a relatively low state. When the seat is switched to the hard support mode, the regulating airbag (3) continues to expand by inflation, so that the support hardness of the seat cushion is converted to a relatively high state. When the regulating airbag (3) contracts by deflation, the seat is switched back to the soft support mode.

11. The multifunctional chair seat according to claim 10, characterized in that: A soft cushion (81) is provided inside the outer cover (8) and covers the upper end of the regulating airbag (3).

12. The multifunctional chair seat according to claim 10, characterized in that: The regulating airbag (3) in the outer cover (8) comprises two side airbags (31) and a rear airbag (32), wherein the two side airbags (31) are respectively located on the left and right sides of the seat plate (7), and the rear airbag (32) is located at the rear side of the seat plate (7).

13. The multifunctional chair seat according to claim 12, characterized in that: The side airbags (31) and the rear airbag (32) on the left and right sides are connected via a connecting pipe (33).

14. The multifunctional chair seat according to claim 13, characterized in that: An air pump (4) for inflating and deflating the regulating air bag (3) is arranged at the bottom end of the seat plate (7). The air pump (4) is connected to one of the connecting pipes (33) via an air pipe (5) that penetrates into the outer sleeve (8).

15. The multifunctional chair seat according to claim 10, characterized in that: A control switch (6) electrically connected to the air charging and discharging pump (4) is provided outside the seat plate (7).

16. The multifunctional chair seat according to claim 10, characterized in that: The regulating airbag (3) is a single airbag arranged in the outer cover (8), and the single airbag changes the support hardness of the seat cushion by expanding or contracting itself, thereby switching the seat between a hard support mode and a soft support mode.

17. The multifunctional chair seat according to claim 16, characterized in that: An air pump (4) for inflating and deflating the regulating air bag (3) is arranged at the bottom end of the seat plate (7). The air pump (4) is connected to the regulating air bag (3) via an air pipe (5) that penetrates into the outer jacket (8).

18. A multifunctional chair seat according to claim 13 or 17, characterized in that: When the seat is in the soft support mode and is not subjected to a sitting force, the seat surface of the seat cushion remains flat at an initial height; when the seat cushion is subjected to a sitting force, the seat surface is sunken downward; when the seat is subjected to a sitting force and switches from the soft support mode to the hard support mode, the airbag (3) is adjusted to expand so that the sunken portion of the seat surface is gradually lifted upward to the initial height position or exceeds the initial height position.

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