A folding seat

Abstract

The utility model discloses a folding seat, including support, be equipped with the back frame that can overturn on the support, be equipped with the same piece of screen cloth on the support and back frame, and back frame overturns on the support and makes screen cloth fold or unfold together, at least be equipped with first protruding portion on back frame, and first protruding portion is configured as screen cloth unfolds, and first protruding portion protrudes forward on back frame front surface and will be screen cloth taut, and first protruding portion will push screen cloth forward or say towards the direction of away from back frame, thereby will be screen cloth taut, solved the screen cloth slack problem caused by the folding allowance, and the screen cloth after taut not only will not appear wrinkle, but also will not appear obvious convex trace, thereby guarantee the beautiful while solving the screen problem, and the scheme does not need to increase complicated parts and mechanism for processing and production cost, and processing is simple, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a folding chair. Background Technology

[0002] In the field of seat design, mesh fabric has become one of the mainstream materials for seat surfaces and backrests due to its breathability, lightness, and elasticity. The tightness of the mesh fabric directly affects the support, comfort, and lifespan of the seat.

[0003] From the perspective of mesh installation, traditional seat mesh needs to be fixed to the chair frame frame with high-strength tension. To ensure that it does not loosen during long-term use, a large tension needs to be applied during installation to precisely align the edges of the mesh with the slots or bolts of the chair frame. This installation method requires extremely high strength and precision, which leads chair manufacturers to generally choose to pre-install the mesh before shipping, rather than providing individual parts for consumers to assemble themselves. Ordinary users lack professional tools and operating experience, making it difficult to stretch the mesh tightly.

[0004] Furthermore, in order to reduce packaging and transportation costs, manufacturers have developed folding chairs. These chairs typically involve rotating a single backrest with a mesh back onto the seat to achieve folding. This results in a noticeable gap between the backrest and the seat, which consumers can easily notice when purchasing, significantly affecting the aesthetics of the folding chair.

[0005] To mitigate the negative impact of this gap, the manufacturer uses the same mesh fabric for the connection between the seat and the back frame, making the backrest appear larger overall. This shifts the gap between the backrest and the seat to a less noticeable position. While this doesn't completely solve the problem of the gap, it does alleviate the issue to some extent.

[0006] However, the contradiction between the compatibility of folding chairs and mesh fabric is even more prominent. In order to realize the folding function of the chair frame, a certain length of allowance needs to be reserved in the design of the mesh fabric to avoid the mesh fabric breaking due to excessive stretching during folding. However, this design will cause the reserved allowance of mesh fabric to not be fully tightened when the chair is unfolded, resulting in obvious looseness. The backrest mesh fabric lacks sufficient support, which can easily cause fatigue for users when sitting for a long time and shortens the service life. How to simply and cleverly solve the contradiction between the folding allowance and the tightness after unfolding is our focus. Summary of the Invention

[0007] To address the aforementioned technical problems, this utility model provides a folding seat, including a support frame with a flip-up back frame. The support frame and the back frame are covered with the same mesh fabric. The back frame flips on the support frame to fold or unfold the mesh fabric together. At least one first protrusion is provided on the back frame. When the mesh fabric is unfolded, the first protrusion protrudes forward from the front surface of the back frame and tightens the mesh fabric. Through a simple structural design, the adaptability of the mesh fabric tightening and folding functions is greatly improved, resulting in greater benefits in both production and use.

[0008] The technical solution of this utility model is implemented as follows: A folding seat includes a frame with a flip-up back frame. The frame and the back frame are provided with the same mesh fabric. The back frame flips on the frame to fold or unfold the mesh fabric together. At least one first protrusion is provided on the back frame. The first protrusion is configured to protrude forward from the front surface of the back frame and tighten the mesh fabric when it is unfolded.

[0009] To address the issue of difficulty in tautling the mesh fabric when unfolded, this solution incorporates at least a first protrusion on the back frame. This protrusion extends beyond the back frame and does not negatively impact the folding of the mesh fabric during folding. However, when unfolded, the first protrusion pushes the mesh fabric forward or away from the back frame, thus tautling it. This solves the problem of mesh fabric looseness caused by pre-existing folding allowance. The taut mesh fabric is wrinkle-free and does not exhibit noticeable outward protrusions, thus ensuring both aesthetics and tautness. Furthermore, the first protrusion extends forward from the front surface of the back frame when unfolded, actively applying outward pressure to the mesh fabric, ensuring it remains taut and close-fitting in its unfolded state. This prevents the mesh fabric from sagging or loosening when the user leans against it, guaranteeing the seat's support and comfort. It also reduces wrinkles and wear caused by long-term looseness, extending the mesh fabric's lifespan.

[0010] Moreover, in terms of processing and production costs, this solution does not require the addition of complex parts and mechanisms, making processing simple and cost-effective. Furthermore, when the mesh size is suitable, the installation of the mesh is also very convenient. Simply fold the back frame, install the mesh, and then unfold it to complete the mesh stretching. This solution greatly improves the adaptability of the mesh stretching and folding functions through a simple structural design, resulting in greater benefits in both production and use.

[0011] Preferably, the first protrusion has a first rotating seat, the bracket has a second rotating seat, and the back frame is flipped and mounted on the bracket through the rotatable connection between the first rotating seat and the second rotating seat.

[0012] Preferably, the back frame includes two vertical bars located on the left and right sides, with a first protrusion formed at the lower end of the vertical bars. Both the vertical bars and the first rotating seat have a generally downward extending direction, and the extending direction of the first rotating seat forms an angle with the extending direction of the vertical bars, with the extending direction of the first rotating seat being further forward than the extending direction of the vertical bars. Because the extending direction of the first rotating seat is forward, this design not only allows the first protrusion (and the first rotating seat) to protrude forward from the front surface of the back frame, but also allows the position of the rotation point, i.e., the pivot, to be further forward. When the rotation point is further forward, the allowance required for folding the mesh fabric is reduced. After reducing the folding allowance of the mesh fabric, the mesh fabric can be tightened simply by protruding the first protrusion.

[0013] Preferably, a first inclined surface is provided on the back frame next to the first rotating seat, and a second inclined surface is provided on the bracket next to the second rotating seat. The first inclined surface and the second inclined surface have an angle and form a slanted cut. When the mesh is folded, the first inclined surface and the second inclined surface move closer to each other and the angle decreases, and the slanted cut closes.

[0014] Preferably, a first abutting part is provided on the back frame behind the first rotating seat, and a second abutting part is provided on the bracket behind the second rotating seat. The first abutting part and the second abutting part abut against each other when the mesh is unfolded, and separate from each other when the mesh is folded.

[0015] Preferably, both the bracket and the back frame have grooves for installing the mesh fabric along their edges. The openings of the grooves face the outside of the folding seat, and the first protrusion extends laterally to the side of the groove along the edge of the folding seat. The closer the protrusion is to the groove, the better the overall mesh tensioning effect.

[0016] Preferably, the armrest is also included, with both ends of the armrest being detachably connected to the back frame and the support, respectively. The armrest is configured to be installed on the back frame and the support after the mesh fabric is unfolded to lock the rotation of the back frame relative to the support. The armrest is L-shaped and includes a first plug-in end and a second plug-in end located at both ends. A first plug-in portion is provided on the back frame, and a second plug-in portion is provided on the support. The first plug-in portion is plugged into the first plug-in end, and the second plug-in portion is plugged into the second plug-in end. The folding function is locked or unlocked via detachable armrests. This folding function is mainly used for packaging and transportation. After removing the armrests, the back frame and mesh fabric can be flipped and folded, which can greatly reduce packaging space and transportation costs. At the same time, the folding function can also be used for storage. Users can fold and store the armrests after removing them, which is also a convenient operation. Compared with the convenience of folding operation, locking via armrests is more focused on stability. Compared with the smaller locking structure in other folding chairs, the strength generated by the armrests connecting the back frame and the bracket is significantly greater. Therefore, the chair is more stable and sturdy after unfolding, making it less prone to damage and extending its service life. When installing the armrests, after the first plug part is inserted into the first plug end and the second plug part is inserted into the second plug end, the two ends are locked with screws.

[0017] Preferably, the support frame has a second protrusion that protrudes forward from the front surface of the back frame and, when the mesh is unfolded, stretches the mesh together with the first protrusion. Corresponding to the first protrusion on the back frame, the support frame also has a second protrusion. The first and second protrusions increase the area of ​​the stretched mesh, further ensuring the effectiveness of the stretched mesh.

[0018] Preferably, the bracket includes two vertically arranged uprights on the left and right sides, with a second protrusion on the uprights; the bracket also includes two longitudinal bars, which are configured as part of the folding seat. The longitudinal bars have grooves for installing the mesh fabric, which is configured to cover both the backrest and seat of the folding seat; when the mesh fabric is folded, the back frame rests against the longitudinal bars. The integrated mesh fabric from the backrest to the seat perfectly eliminates the gap between the backrest and the seat, resulting in a better overall visual effect; however, this more complex mesh fabric is less compatible with the folding function. If the mesh fabric is not taut, not only will the backrest mesh fabric lack support, but the seat mesh fabric will also be prone to excessive collapse under stress, making users more prone to fatigue after prolonged sitting, and significantly shortening its service life; however, this solution achieves a harmonious compatibility between the integrated mesh fabric and the folding function through a simple and ingenious mesh tautness method.

[0019] Preferably, the back frame and the support are connected by pivots arranged on the left and right. The pivots are located near the front surface of the connection between the back frame and the support. When the pivots are set in the front position, the required folding allowance of the mesh is less, which makes it easier to stretch the mesh through the first protrusion.

[0020] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows: To address the issue of difficulty in tautling the mesh fabric when unfolded, this solution incorporates at least a first protrusion on the back frame. This protrusion extends beyond the back frame and does not negatively impact the folding of the mesh fabric during folding. However, when unfolded, the first protrusion pushes the mesh fabric forward or away from the back frame, thus tautling it. This solves the problem of mesh fabric looseness caused by pre-existing folding allowance. The taut mesh fabric is wrinkle-free and does not exhibit noticeable outward protrusions, thus ensuring both aesthetics and tautness. Furthermore, the first protrusion extends forward from the front surface of the back frame when unfolded, actively applying outward pressure to the mesh fabric, ensuring it remains taut and close-fitting in its unfolded state. This prevents the mesh fabric from sagging or loosening when the user leans against it, guaranteeing the seat's support and comfort. It also reduces wrinkles and wear caused by long-term looseness, extending the mesh fabric's lifespan.

[0021] Moreover, in terms of processing and production costs, this solution does not require the addition of complex parts and mechanisms, making processing simple and cost-effective. Furthermore, when the mesh size is suitable, the installation of the mesh is also very convenient. Simply fold the back frame, install the mesh, and then unfold it to complete the mesh stretching. This solution greatly improves the adaptability of the mesh stretching and folding functions through a simple structural design, resulting in greater benefits in both production and use. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the folding seat unfolded without mesh fabric in an embodiment of the present invention; Figure 2 This is a side view of the folding seat unfolded without the mesh fabric in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the folding seat of this utility model when there is no mesh fabric in the embodiment; Figure 4 This is a three-dimensional structural diagram of the folding seat in the embodiment of the present invention when unfolded. Figure 1 ; Figure 5 This is a three-dimensional structural diagram of the folding seat in the embodiment of the present invention when unfolded. Figure 2 ; Figure 6 This is a three-dimensional structural diagram of the folding seat in the embodiment of the present invention. Figure 7 This is a three-dimensional structural diagram of the back frame in an embodiment of the present invention; Figure 8 This is a side view of the back frame in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram of the bracket in the embodiments of this utility model; Figure 10 This is a side view of the bracket in an embodiment of the present invention; Figure 11 This is a three-dimensional structural diagram of the handrail in an embodiment of the present invention.

[0023] The reference numerals in the attached drawings are as follows: 1. Bracket; 2. Back frame; 3. Mesh fabric; 4. First protrusion; 5. Vertical rod; 6. Upright rod; 7. Second protrusion; 8. Longitudinal rod; 9. Groove; 10. Horizontal rod; 11. First rotating seat; 12. Second rotating seat; 14. Rotating shaft; 15. First inclined surface; 16. Second inclined surface; 17. Angled cut; 18. First abutment; 19. Second abutment; 20. Handrail; 21. First insertion end; 22. Second insertion end; 23. First insertion part; 24. Second insertion part; 25. First slot; 26. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] The specific implementation of this utility model is as follows: like Figure 1-6 As shown, this utility model provides a folding seat, including a support 1, a back frame 2 that can be flipped on the support 1, and the same mesh fabric 3 on the support 1 and the back frame 2. The back frame 2 flips on the support 1 so that the mesh fabric 3 is folded or unfolded together; at least a first protrusion 4 is provided on the back frame 2. The first protrusion 4 is configured such that when the mesh fabric 3 is unfolded, the first protrusion 4 protrudes forward from the front surface of the back frame 2 and tightens the mesh fabric 3.

[0028] To address the issue of the mesh fabric 3 being difficult to tighten when unfolded, this solution includes at least a first protrusion 4 on the back frame 2. This first protrusion 4 protrudes from the back frame 2 and does not adversely affect the folding of the mesh fabric 3 during folding. However, when unfolded, the first protrusion 4 pushes the mesh fabric 3 forward or away from the back frame 2, thereby tightening the mesh fabric 3. This solves the problem of the mesh fabric 3 becoming loose due to the reserved folding allowance. The tightened mesh fabric 3 not only does not have wrinkles but also does not have obvious outward protrusion marks, thus solving the mesh tightness problem while ensuring aesthetics. At the same time, the first protrusion 4 can protrude forward from the front surface of the back frame 2 when unfolded, actively forming an outward pressing force on the mesh fabric 3, ensuring that the mesh fabric 3 always remains tight and close-fitting in the unfolded state. This prevents the mesh fabric 3 from sinking or becoming loose when the user leans against it, ensuring the support and comfort of the seat. It also reduces wrinkles and wear caused by long-term looseness of the mesh fabric 3, extending its service life.

[0029] Moreover, in terms of processing and production costs, this solution does not require the addition of complex parts and mechanisms, making processing simple and cost-effective. Furthermore, when the size of the mesh fabric 3 is suitable, its installation is also very convenient. Simply fold the back frame 2, install the mesh fabric 3, and then unfold it to complete the mesh stretching. This solution significantly improves the adaptability of the mesh fabric 3's stretching and folding functions through a simple structural design, resulting in greater benefits in both production and use.

[0030] Specifically, such as Figure 1 , 2 As shown in Figures 7-10, the back frame 2 includes two vertical rods 5 located on the left and right sides, and a first protrusion 4 is formed at the lower end of the vertical rod 5; the support 1 includes two vertically arranged uprights 6 located on the left and right sides, and a second protrusion 7 is provided at the upper end of the uprights 6. The second protrusion 7 protrudes forward from the front surface of the back frame 2 and, together with the first protrusion 4, tightens the mesh 3 when the mesh 3 is unfolded; corresponding to the first protrusion 4 on the back frame 2, a second protrusion 7 is also provided on the support 1. The first protrusion 4 and the second protrusion 7 increase the area of ​​the mesh tensioning and further ensure the effect of the mesh tensioning.

[0031] The support frame 1 also includes two longitudinal bars 8 arranged in the front-to-back direction, and upright bars 6 located at the rear end of the longitudinal bars 8. The two longitudinal bars 8, the two upright bars 5, and the two upright bars 6 are arranged at intervals from left to right. The longitudinal bars 8 are configured as part of the folding seat. Both the support frame 1 and the back frame 2 have grooves 9 for installing the mesh fabric 3 on their edges. The opening of the grooves 9 faces the outside of the folding seat. That is, grooves 9 are provided on the longitudinal bar 8, the vertical bar 5, and the upright bar 6. The opening of the groove 9 on the left side faces the left side, and the opening of the groove 9 on the right side faces the right side. The back frame 2 also includes a horizontal bar 10 located at the upper end of the two vertical bars 5. The horizontal bar 10 also has grooves 9, which face the rear.

[0032] like Figure 1 , 4 As shown in Figure 6, the edge of the mesh fabric 3 is provided with a strip, and the mesh fabric 3 is configured to cover both the backrest and seat of the folding chair. When the mesh fabric 3 is folded, the back frame 2 rests against the vertical bar 8. The integrated mesh fabric 3 from the backrest to the seat perfectly eliminates the gap between the backrest and the seat, resulting in a better overall visual effect. However, for this more complex mesh fabric 3, the compatibility with the folding function is worse. If the mesh fabric 3 is not taut, not only will the backrest mesh fabric 3 lack support, but the seat mesh fabric 3 will also be prone to excessive collapse under stress, making users more prone to fatigue after sitting for a long time, and the service life will be greatly shortened. However, the simple and ingenious mesh tautness method of this solution can achieve a coordinated compatibility between the integrated mesh fabric 3 and the folding function.

[0033] The first protrusion 4 and the second protrusion 7 extend laterally toward the edge of the folding seat to the side of the groove 9. The closer the protrusion is to the groove 9, the better the overall mesh effect.

[0034] Furthermore, the first protrusion 4 has a first rotating seat 11, and the second protrusion 7 has a second rotating seat 12. The back frame 2 is flipped and mounted on the bracket 1 through the rotatable connection between the first rotating seat 11 and the second rotating seat 12. The first rotating seat 11 and the second rotating seat 12 are rotatably connected by a rotating shaft 14, which is arranged in the left-right direction, so that the back frame 2 can be flipped back and forth. The rotating shaft 14 is located near the front surface of the connection between the back frame 2 and the bracket 1. When the rotating shaft 14 is set in the front position, the required folding allowance of the mesh fabric 3 is less, which is more conducive to stretching the mesh through the first protrusion 4.

[0035] Specifically: like Figure 7-10 As shown, both the vertical rod 5 and the first rotating seat 11 extend in a generally downward direction, while both the vertical rod 6 and the second rotating seat 12 extend in a generally upward direction. The extension direction of the first rotating seat 11 forms an angle with the extension direction of the vertical rod 5, and the extension direction of the first rotating seat 11 is further forward than the extension direction of the vertical rod 5. Similarly, the extension direction of the second rotating seat 12 forms an angle with the extension direction of the vertical rod 6, and the extension direction of the second rotating seat 12 is further forward than the extension direction of the vertical rod 6. Furthermore, along the vertical direction, the upper part of the vertical rod 6 and the lower part of the vertical rod 5 both have a front-to-back curve; that is, the vertical rod 6 has an arc when extending upward, and the vertical rod 5 has an arc when extending downward. The first rotating seat 11 and the second rotating seat 12... When the moving seat 12 extends, its curvature no longer matches that of the vertical rod 5 and the upright rod 6, thus forming an angle. The two rotating seats are further forward, which makes the first protrusion 4 and the second protrusion 7 protrude forward. At the same time, the position of the rotation point, i.e. the pivot 14, is also further forward. Taking the first rotating seat 11 as an example, since the extension direction of the first rotating seat 11 is forward, this solution not only allows the first protrusion 4 (and the first rotating seat 11) to protrude forward from the front surface of the back frame 2, but also makes the position of the rotation point, i.e. the pivot 14, further forward. When the position of the rotation point is further forward, the allowance required when folding the mesh fabric 3 is less. After reducing the folding allowance of the mesh fabric 3, the mesh fabric 3 can be tightened simply by protruding the first protrusion 4.

[0036] Furthermore, a first inclined surface 15 is provided on the back frame 2 next to the first rotating seat 11, and a second inclined surface 16 is provided on the bracket 1 next to the second rotating seat 12. The first inclined surface 15 and the second inclined surface 16 form an angle and a slanted cut 17. When the mesh 3 is folded, the first inclined surface 15 and the second inclined surface 16 move closer to each other and the angle decreases, and the slanted cut 17 closes. The positional relationship between the rotating shaft 14 and the slanted cut 17 is such that the rotating shaft 14 is exposed in the slanted cut 17. Moreover, the slanted cut 17 is located near the front surface of the vertical rod 5 and the upright rod 6, with a depth of... The smaller the size, the less impact it has on the mesh fabric 3. The oblique cut 17 is located on the outside of the rotating seat. Since the protrusion extends to the vicinity of the groove 9, it will also pass through the upper and lower sides of the oblique cut 17, thereby further reducing the impact of the oblique cut 17 on the mesh fabric 3. A first abutting part 18 is provided on the vertical rod 5 behind the first rotating seat 11, and a second abutting part 19 is provided on the vertical rod 6 behind the second rotating seat 12. The first abutting part 18 and the second abutting part 19 abut against each other when the mesh fabric 3 is unfolded, and separate from each other when the mesh fabric 3 is folded.

[0037] like Figure 1-3 As shown in Figure 7-11, the folding chair back also includes an armrest 20. The two ends of the armrest 20 are detachably connected to the back frame 2 and the support 1, respectively. The armrest 20 is configured to be installed on the back frame 2 and the support 1 after the mesh fabric 3 is unfolded to lock the rotation of the back frame 2 relative to the support 1. The armrest 20 is L-shaped and includes a first insertion end 21 and a second insertion end 22 located at both ends. The back frame 2 is provided with a first insertion part 23, and the support 1 is provided with a second insertion part 24. The first insertion part 23 is inserted into the first insertion end 21, and the second insertion part 24 is inserted into the second insertion end 22. The first insertion part 23 protrudes backward from the rear surface of the vertical rod 5, and the second insertion part 24 is located on the lower surface of the vertical rod 8. The second insertion part 24 is provided with a second slot 26, and the first insertion end 21 is provided with a first slot 25. The first insertion part 23 is inserted into the first slot 25, and the second insertion end 22 is inserted into the second slot 26 to achieve the insertion and engagement of the two.

[0038] The folding function is locked or unlocked via the detachable armrest 20. This folding function is mainly used for packaging and transportation. After removing the armrest 20, the back frame 2 and mesh fabric 3 can be flipped and folded, which can greatly reduce packaging space and transportation costs. At the same time, the folding function can also be used for storage. Users can fold and store the armrest 20 after removing it, which is also a convenient operation. Compared with the convenience of folding operation, locking via the armrest 20 is more focused on stability. Compared with the smaller locking structure in other folding seats, the armrest 20, which connects the back frame 2 and the bracket 1, has significantly greater strength. Therefore, the seat is more stable and sturdy after unfolding, making it less prone to damage and extending its service life. When installing the armrest 20, the first plug-in part 23 is plugged into the first plug-in end 21, and the second plug-in part 24 is plugged into the second plug-in end 22. Then, the two ends are locked with screws.

Claims

1. A folding chair, characterized in that: The device includes a support frame with a rotatable back frame. The support frame and the back frame are covered with the same mesh fabric. The back frame is rotated on the support frame to fold or unfold the mesh fabric together. At least one first protrusion is provided on the back frame. The first protrusion is configured such that when the mesh fabric is unfolded, the first protrusion protrudes forward from the front surface of the back frame and tightens the mesh fabric.

2. The folding seat according to claim 1, characterized in that: The first protrusion has a first rotating seat, the bracket has a second rotating seat, and the back frame is flipped and mounted on the bracket through the rotatable connection between the first rotating seat and the second rotating seat.

3. The folding seat according to claim 2, characterized in that: The back frame includes two vertical bars located on the left and right sides, with a first protrusion formed at the lower end of the vertical bar; both the vertical bar and the first rotating seat have a generally downward extending direction, and there is an angle between the extending direction of the first rotating seat and the extending direction of the vertical bar, with the extending direction of the first rotating seat being more forward than the extending direction of the vertical bar.

4. The folding seat according to claim 2, characterized in that: A first inclined surface is provided on the back frame next to the first rotating seat, and a second inclined surface is provided on the bracket next to the second rotating seat. The first inclined surface and the second inclined surface have an angle and form a slanted cut. When the mesh is folded, the first inclined surface and the second inclined surface move closer to each other and the angle decreases, and the slanted cut closes.

5. The folding seat according to claim 2, characterized in that: A first abutting part is provided on the back frame behind the first rotating seat, and a second abutting part is provided on the bracket behind the second rotating seat. The first abutting part and the second abutting part abut against each other when the mesh is unfolded, and separate from each other when the mesh is folded.

6. The folding seat according to claim 1, characterized in that: Both the bracket and the back frame have grooves for installing the mesh fabric on their edges. The openings of the grooves face the outside of the folding seat, and the first protrusion extends laterally to the side of the groove along the edge of the folding seat.

7. The folding seat according to claim 1, characterized in that: It also includes handrails, with both ends of the handrails being detachably connected to the back frame and the support, respectively. The handrails are configured to be installed on the back frame and the support after the mesh fabric is unfolded to lock the rotation of the back frame relative to the support. The handrails are L-shaped and include a first plug-in end and a second plug-in end located at both ends. A first plug-in part is provided on the back frame, and a second plug-in part is provided on the support. The first plug-in part is plugged into the first plug-in end, and the second plug-in part is plugged into the second plug-in end.

8. The folding seat according to claim 1, characterized in that: The bracket is provided with a second protrusion, which protrudes forward from the front surface of the back frame and tightens the mesh together with the first protrusion when the mesh is unfolded.

9. The folding seat according to claim 8, characterized in that: The support frame includes two vertically arranged uprights on the left and right sides, with a second protrusion on the uprights; the support frame also includes two longitudinal bars, which are configured as part of the seat of the folding chair, and have grooves for installing the mesh fabric, which is configured to cover both the backrest and seat of the folding chair; when the mesh fabric is folded, the back frame rests against the longitudinal bars.

10. The folding seat according to claim 1, characterized in that: The back frame and the bracket are connected by pivots arranged on the left and right sides, with the pivots located near the front surface where the back frame and the bracket are connected.

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