Folding support and folding chair using same

Abstract

The utility model relates to a folding support and a folding chair using the folding support, the folding support comprises a first rear side supporting block, a second rear side supporting block, a second front side supporting block, a first front side supporting block, a first rotating assembly and a second rotating assembly, two ends of a first side rod are respectively connected with the first rear side supporting block and the first front side supporting block; the two ends of the second side rod are connected with the second rear side supporting block and the second front side supporting block correspondingly. The two ends of the first front rod are connected with the first front side supporting block and the first rotating assembly correspondingly. The two ends of the second front rod are connected with the second front side supporting block and the second rotating assembly correspondingly. The first rear side supporting block and the second rear side supporting block are connected with different supporting rods of the folding chair respectively, the first rotating assembly is connected with the second rotating assembly, and the first rear side supporting block and the second rear side supporting block are directly connected through a hinge structure.

Description

Technical Field

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

[0002] Most outdoor camping chairs on the market today have complex structures, large storage volume, and heavy weight. Some portable chairs use a single crossbeam, quadrilateral structure, or cross structure, which makes the overall structure unstable and the storage process cumbersome, making them very inconvenient for the outdoor experience.

[0003] Chairs with so-called triangular support frames appearing on the market (see Chinese Utility Model Patent CN215347878U, Utility Model Name "A Folding Space Chair") are actually quadrilateral structures. Their rear support blocks are integral structures. In order to achieve the folding function, the two side rods can only be hinged to the rear support block respectively, forming two hinge points. Therefore, the distance between the two hinge points of the rear support block is actually another side. It is hinged to the two side sides and the front support rod in pairs to form a quadrilateral or trapezoidal structure. The stability of this structure is relatively weak. Utility Model Content

[0004] This utility model designs a folding bracket and a folding chair using it. The technical problem it solves is that existing folding chairs have unstable structures, cumbersome storage steps, and are very inconvenient for outdoor use.

[0005] To solve the aforementioned technical problems, the present invention adopts the following solution:

[0006] A folding support includes a first rear support block, a second rear support block, a second front support block, a first front support block, a first rotating assembly, and a second rotating assembly. Two ends of a first side rod are connected to the first rear support block and the first front support block, respectively; two ends of a second side rod are connected to the second rear support block and the second front support block, respectively; two ends of a first front rod are connected to the first front support block and the first rotating assembly, respectively; two ends of a second front rod are connected to the second front support block and the second rotating assembly, respectively; the first and second rear support blocks are connected to different support rods of a folding chair, respectively; and the first rotating assembly is connected to the second rotating assembly. The first and second rear support blocks are directly connected via a hinge structure.

[0007] Preferably, the first rear support block includes at least a first upper rotating plate and a first lower rotating plate, with a gap between the first upper rotating plate and the first lower rotating plate; the second rear support block includes at least a second upper rotating plate and a second lower rotating plate, with a gap between the second upper rotating plate and the second lower rotating plate; the first upper rotating plate is located between the second upper rotating plate and the second lower rotating plate, and the second lower rotating plate is located between the first upper rotating plate and the first lower rotating plate; the first connecting shaft passes through the through holes of the first upper rotating plate, the first lower rotating plate, the second upper rotating plate, and the second lower rotating plate for hinge connection.

[0008] Preferably, the first rear support block includes an upper rotating plate and a lower rotating plate, with a gap between the upper and lower rotating plates; the second rear support block includes a middle rotating plate, which is located in the gap between the upper and lower rotating plates, and the first connecting shaft passes through the through holes of the upper, middle, and lower rotating plates for hinge connection.

[0009] Preferably, it further includes a telescopic rod, one end of which, the first rotating assembly, and the second rotating assembly are hinged together; or / and the other end of which, the first rear support block, and the second rear support block are hinged together via a first connecting shaft; the telescopic rod lengthening or shortening causes the included angle between the first side rod and the second side rod to increase or decrease, thereby achieving unfolding or folding.

[0010] Preferably, the first rear support block is further provided with a first upper connecting part and a first lower connecting part, the first upper connecting part being connected to the first seat support rod, and the first lower connecting part being connected to the first support leg; the second rear support block is further provided with a second upper connecting part and a second lower connecting part, the second upper connecting part being connected to the second seat support rod, and the second lower connecting part being connected to the second support leg.

[0011] Preferably, it further includes a mounting base, which is fixedly connected to the first lower rotating plate, or the mounting base is fixedly connected to the lower rotating plate or the upper rotating plate; the mounting base is provided with a mounting hole, and the other end of the telescopic rod is located in the mounting hole of the mounting base.

[0012] Preferably, the first rotating assembly includes a first upper rotating component and a first lower rotating component, with a gap between the first upper rotating component and the first lower rotating component; the second rotating assembly includes a second upper rotating component and a second lower rotating component, with a gap between the second upper rotating component and the second lower rotating component; one end of the telescopic rod is located between the first upper rotating component and the second lower rotating component, the second upper rotating component is located above the first upper rotating component, the first lower rotating component is located below the second lower rotating component, and the second connecting shaft passes through the second upper rotating component, the first upper rotating component, one end of the telescopic rod, the second lower rotating component, and the through hole on the first lower rotating component for hinge connection.

[0013] Preferably, the first front support block includes a first connecting part A, a second connecting part A, a third connecting part A and a fourth connecting part A. The first connecting part A is connected to the first side rod, the second connecting part A is hinged to the first front rod, the third connecting part A is connected to the fourth seat support rod, and the fourth connecting part A is connected to the fourth support leg.

[0014] The second front support block includes a first connecting part B, a second connecting part B, a third connecting part B, and a fourth connecting part B. The first connecting part B is connected to the second side rod, the second connecting part B is hinged to the second front rod, the third connecting part B is connected to the third seat support rod, and the fourth connecting part B is connected to the third support leg.

[0015] Preferably, the telescopic rod includes an elastic body, an outer tube, and an inner tube. The inner tube can enter or exit the outer tube. The outer tube is provided with an elastic body for the inner tube to reset. A limiting hole is provided on the outer wall of the outer tube. A push-button switch is provided on the inner tube. Pressing the push-button switch causes it to enter the limiting hole so that the push-button switch no longer obstructs the relative movement between the outer tube and the inner tube. When the push-button switch is not pressed, pressing the push-button switch causes it to extend out of the limiting hole so that the outer tube and the inner tube are locked.

[0016] Preferably, the outer tube has a first passage hole for the second connecting shaft to pass through, and the inner tube has a second passage hole for the first connecting shaft to pass through.

[0017] Preferably, the first support leg, the second support leg, the third support leg, and the fourth support leg are provided with protective sleeves.

[0018] A folding chair includes the aforementioned folding bracket and chair cover, characterized in that: the chair cover is provided with four sleeves, each sleeve being detachably connected to a first seat support rod, a second seat support rod, a third seat support rod, and a fourth seat support rod.

[0019] The folding bracket and the folding chair using it have the following beneficial effects:

[0020] (1) In this utility model, the front and rear hinge structure is connected by a combination of multi-layer rotating plates, which further ensures the stability of the chair opening and avoids the problem of uneven force on the hinge part leading to a short life of the chair.

[0021] (2) This utility model adopts two rear support blocks directly hinged together, so that the two side rods connected to each other are hinged together to form a stable triangular structure. Since a telescopic structure and a locking mechanism are also provided, the rotation of the two side rods is synchronized with the movement of the telescopic rod, and the locking mechanism can better provide stability when the chair is opened.

[0022] (3) The telescopic rod of this utility model is also equipped with an elastic element and the locking mechanism unlocking performance assists the automatic storage of the triangular structure. Attached Figure Description

[0023] Figure 1 Assembly drawing of the folding bracket of this utility model;

[0024] Figure 2 : A top view of the folding bracket of this utility model;

[0025] Figure 3 : A schematic diagram of the folding bracket of this utility model from a downward angle;

[0026] Figure 4 : Schematic diagram of the hinged front end of the folding bracket of this utility model;

[0027] Figure 5 : Schematic diagram of the rear hinge of the folding bracket of this utility model;

[0028] Figure 6 : Rear hinge structure diagram of the folding bracket of this utility model;

[0029] Figure 7 : Second structural diagram of the rear hinge of the folding bracket of this utility model;

[0030] Figure 8 : Another connection diagram of the hinge structure of the folding chair of this utility model;

[0031] Figure 9 : A schematic diagram of the unfolded folding chair of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 11—First rear support block; 111—First upper connecting part; 112—First lower connecting part; 113—First upper rotating plate; 114—First lower rotating plate; 115—Upper rotating plate; 116—Lower rotating plate;

[0034] 12—Second rear support block; 121—Second upper connecting part; 122—Second lower connecting part; 123—Second upper rotating plate; 124—Second lower rotating plate; 125—Intermediate rotating plate;

[0035] 13—Second front support block; 14—First front support block; 15—First rotating assembly; 151—First upper rotating component; 152—First lower rotating component; 16—Second rotating assembly; 161—Second upper rotating assembly; 162—Second lower rotating assembly; 17—First connecting shaft; 18—Second connecting shaft; 19—Mounting base;

[0036] 21—First seat support rod; 22—Second seat support rod; 23—Third seat support rod; 24—Fourth seat support rod;

[0037] 31—First supporting leg; 32—Second supporting leg; 33—Third supporting leg; 34—Fourth supporting leg;

[0038] 41—First side rod; 42—Second side rod; 43—First front rod; 44—Second front rod; 45—Telescopic rod; 451—Outer tube; 452—Inner tube; 453—Button switch; 454—First passage hole; 455—Second passage hole;

[0039] 5—Chair cover. Detailed Implementation

[0040] The following is combined Figures 1 to 9 The present invention will be further described below:

[0041] like Figure 1 As shown, a folding bracket includes a first rear support block 11, a second rear support block 12, a second front support block 13, a first front support block 14, a first rotating assembly 15, and a second rotating assembly 16. The two ends of a first side rod 41 are connected to the first rear support block 11 and the first front support block 14, respectively. The two ends of a second side rod 42 are connected to the second rear support block 12 and the second front support block 13, respectively. The two ends of a first front rod 43 are connected to the first front support block 14 and the first rotating assembly 15, respectively. The two ends of a second front rod 44 are connected to the second front support block 13 and the second rotating assembly 16, respectively. The first rotating assembly 15 is connected to the second rotating assembly 16.

[0042] In order to provide sufficient support for the rotating assembly when the chair is opened, the rotating assembly is provided with a telescopic rod 45 that is telescopic and lockable. One end of the telescopic rod 45, the first rotating assembly 15 and the second rotating assembly 16 are hinged together; or / and the other end of the telescopic rod 45, the first rear support block 11 and the second rear support block 12 are hinged together. The telescopic rod 45 can be lengthened or shortened to increase or decrease the included angle between the first side rod 41 and the second side rod 42, thereby realizing the unfolding or folding.

[0043] The first rear support block 11 and the second rear support block 12 are connected to the two side rods to form two sides of a triangle and can rotate around the hinge point by a certain angle. The other ends of the two side rods are connected to the second front support block 13 and the first front support block 14 respectively. The two front support blocks are also hinged to one end of the front rod, thus forming a triangular structure.

[0044] like Figure 2As shown, the first front support block 14 includes a first connecting part A141, a second connecting part A142, a third connecting part A143, and a fourth connecting part A144. The first connecting part A141 is connected to the first side rod 41, the second connecting part A142 is hinged to the first front rod 43, the third connecting part A143 is connected to the fourth seat support rod 24, and the fourth connecting part A144 is connected to the fourth support leg 34. The second front support block 13 includes a first connecting part B131, a second connecting part B132, a third connecting part B133, and a fourth connecting part B134. The first connecting part B131 is connected to the second side rod 42, the second connecting part B132 is hinged to the second front rod 44, the third connecting part B133 is connected to the third seat support rod 23, and the fourth connecting part B134 is connected to the third support leg 33.

[0045] The first rear support block 11 is also provided with a first upper connecting part 111 and a first lower connecting part 112. The first upper connecting part 111 is connected to the first seat support rod 21, and the first lower connecting part 112 is connected to the first support leg 31. The second rear support block 12 is also provided with a second upper connecting part 121 and a second lower connecting part 122. The second upper connecting part 121 is connected to the second seat support rod 22, and the second lower connecting part 122 is connected to the second support leg 32.

[0046] like Figure 3 As shown, it also includes a mounting base 19, which is fixedly connected to the first lower rotating plate 114; or the mounting base 19 is fixedly connected to the lower rotating plate 116 or the upper rotating plate 115; the mounting base 19 is provided with a mounting hole, and the other end of the telescopic rod 45 is located in the mounting hole of the mounting base 19.

[0047] like Figure 4 As shown, in order to enable the triangular structure to fold, a foldable component is provided at the middle position between the first front rod 43 and the second front rod 44: a first rotating component 15 and a second rotating component 16, which include a structural component that rotates on a single axis or multiple axes.

[0048] The specific structure is as follows: The first rotating assembly 15 includes a first upper rotating component 151 and a first lower rotating component 152, with a gap between the first upper rotating component 151 and the first lower rotating component 152; the second rotating assembly 16 includes a second upper rotating component 161 and a second lower rotating component 162, with a gap between the second upper rotating component 161 and the second lower rotating component 162; one end of the telescopic rod 45 is located between the first upper rotating component 151 and the second lower rotating component 162, the second upper rotating component 161 is located above the first upper rotating component 151, and the first lower rotating component 152 is located below the second lower rotating component 162; the second connecting shaft 18 passes through the second upper rotating component 161, the first upper rotating component 151, one end of the telescopic rod 45, the second lower rotating component 162, and the through hole on the first lower rotating component 152 for hinge connection.

[0049] The telescopic rod 45 includes an elastic body, an outer tube 451 and an inner tube 452. The inner tube 452 can enter or leave the outer tube 451. The outer tube 451 is provided with an elastic body for the repositioning of the inner tube 452.

[0050] A push-button switch is located in the middle of the telescopic rod to lock or unlock the entire triangular structure. A limiting hole is provided on the outer wall of the outer tube 451, and a push-button switch 453 is provided on the inner tube 452. Pressing the push-button switch 453 allows it to enter the limiting hole, thus preventing it from obstructing relative movement between the outer tube 451 and the inner tube 452. When the push-button switch 453 is not pressed, pressing it extends it out of the limiting hole, locking the outer tube 451 and the inner tube 452.

[0051] The outer tube 451 is provided with a first passage hole 454 for the second connecting shaft 18 to pass through, and the inner tube is provided with a second passage hole 455 for the first connecting shaft 17 to pass through.

[0052] like Figure 5 As shown, the first rear support block 11 includes a first upper rotating plate 113 and a first lower rotating plate 114, with a gap between the first upper rotating plate 113 and the first lower rotating plate 114; the second rear support block 12 includes a second upper rotating plate 123 and a second lower rotating plate 124, with a gap between the second upper rotating plate 123 and the second lower rotating plate 124; the first upper rotating plate 113 is located between the second upper rotating plate 123 and the second lower rotating plate 124, and the second lower rotating plate 124 is located between the first upper rotating plate 113 and the first lower rotating plate 114; the first connecting shaft 17 passes through the through hole on the other end of the first upper rotating plate 113, the first lower rotating plate 114, the second upper rotating plate 123, the second lower rotating plate 124, and the telescopic rod 45 for hinge connection.

[0053] like Figure 6As shown, the first type of hinge structure of the folding chair of this utility model includes a first rear support block 11 and a second rear support block 12, which are respectively connected to different support rods of the folding chair. The different support rods of the folding chair may include a first side rod 41 and a second side rod 42, or may be applied to other side rods.

[0054] The first rear support block 11 and the second rear support block 12 are connected by a hinge. The first rear support block 11 includes at least a first upper rotating plate 113 and a first lower rotating plate 114, with a gap between the first upper rotating plate 113 and the first lower rotating plate 114. The second rear support block 12 includes at least a second upper rotating plate 123 and a second lower rotating plate 124, with a gap between the second upper rotating plate 123 and the second lower rotating plate 124. The first upper rotating plate 113 is located between the second upper rotating plate 123 and the second lower rotating plate 124, and the second lower rotating plate 124 is located between the first upper rotating plate 113 and the first lower rotating plate 114. The first connecting shaft 17 passes through the through hole on the other end of the first upper rotating plate 113, the first lower rotating plate 114, the second upper rotating plate 123, the second lower rotating plate 124, and the telescopic rod 45 for hinge connection.

[0055] The fact that the first rear support block 11 includes at least a first upper rotating plate 113 and a first lower rotating plate 114 means that for better stability, the first rear support block 11 can have more rotating plates. Similarly, the second rear support block 12 can have more rotating plates.

[0056] like Figure 7 As shown, the second hinge structure of the folding chair of this utility model is as follows: the first rear support block 11 includes an upper rotating piece 115 and a lower rotating piece 116, and there is a gap between the upper rotating piece 115 and the lower rotating piece 116; the second rear support block 12 includes a middle rotating piece 125, which is located in the gap between the upper rotating piece 115 and the lower rotating piece 116, and the first connecting shaft 17 passes through the through holes of the upper rotating piece 115, the middle rotating piece 125 and the lower rotating piece 116 for hinge connection.

[0057] The hinge structure of this utility model folding chair can be used not only with the telescopic rod 45, but also with folding chair frames that do not have the telescopic rod 45, such as... Figure 8 As shown.

[0058] like Figure 9As shown, a folding chair includes the aforementioned folding support frame and a chair cover 5. The chair cover 5 is characterized by having four sleeves, each sleeve being detachably connected to the first seat support rod 21, the second seat support rod 22, the third seat support rod 23, and the fourth seat support rod 24. Protective sleeves are provided on the first support leg 31, the second support leg 32, the third support leg 33, and the fourth support leg 34.

[0059] The working principle of this utility model is as follows:

[0060] 1. Chair opening mode:

[0061] When the chair needs to be opened, press the button switch 453 to extend the telescopic rod 45, causing the first rotating component 15 and the second rotating component 16 connected to the telescopic rod 45 to rotate. This causes the first front rod 43 and the second front rod 44 connected to the left and right to gradually form a straight line. This drives the other ends of the first front rod 43 and the second front rod 44 and the two front support blocks that are movably hinged together to change the angle, causing the angles of the two rear support blocks and the two side rods to also change. The entire structure is linked together. Finally, when the locking buckle of the telescopic rod reaches the positioning, the entire triangular support mechanism opens smoothly and locks automatically.

[0062] 2. Chair storage mode:

[0063] When the chair needs to be folded up, press the button switch 453 to shorten the telescopic rod 45. Due to the mechanical linkage, when the telescopic rod retracts, the angle between the first rotating component 15 and the second rotating component 16 becomes smaller, which drives the first front rod 43 and the second front rod 44 to change from a straight line to an angle, pulling the angle between the two side rods to a smaller, thereby realizing the automatic folding function.

[0064] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A folding support, comprising a first rear support block (11), a second rear support block (12), a second front support block (13), a first front support block (14), a first rotating assembly (15), and a second rotating assembly (16), wherein the two ends of a first side rod (41) are respectively connected to the first rear support block (11) and the first front support block (14), and the two ends of a second side rod (42) are respectively connected to the second rear support block (12) and the second front support block (13); the two ends of a first front rod (43) are respectively connected to the first front support block (14) and the first rotating assembly (15), and the two ends of a second front rod (44) are respectively connected to the second front support block (13) and the second rotating assembly (16); the first rotating assembly (15) is connected to the second rotating assembly (16), and the first rear support block (11) and the second rear support block (12) are respectively connected to different support rods of a folding chair, characterized in that: The first rear support block (11) and the second rear support block (12) are directly connected by a hinge structure.

2. The folding bracket according to claim 1, characterized in that, The first rear support block (11) includes at least a first upper rotating plate (113) and a first lower rotating plate (114), with a gap between the first upper rotating plate (113) and the first lower rotating plate (114); the second rear support block (12) includes at least a second upper rotating plate (123) and a second lower rotating plate (124), with a gap between the second upper rotating plate (123) and the second lower rotating plate (124); the first upper rotating plate (113) is located between the second upper rotating plate (123) and the second lower rotating plate (124), and the second lower rotating plate (124) is located between the first upper rotating plate (113) and the first lower rotating plate (114); the first connecting shaft (17) passes through the through holes of the first upper rotating plate (113), the first lower rotating plate (114), the second upper rotating plate (123), and the second lower rotating plate (124) for hinge connection; Alternatively, the first rear support block (11) includes an upper rotating plate (115) and a lower rotating plate (116), with a gap between the upper rotating plate (115) and the lower rotating plate (116); the second rear support block (12) includes an intermediate rotating plate (125), which is located in the gap between the upper rotating plate (115) and the lower rotating plate (116), and the first connecting shaft (17) is hinged through the through holes of the upper rotating plate (115), the intermediate rotating plate (125) and the lower rotating plate (116).

3. The folding bracket according to claim 2, characterized in that: It also includes a telescopic rod (45), one end of the telescopic rod (45), the first rotating component (15) and the second rotating component (16) are hinged together; or / and, the other end of the telescopic rod (45), the first rear support block (11) and the second rear support block (12) are hinged together by a first connecting shaft (17); the telescopic rod (45) becomes longer or shorter so that the included angle between the first side rod (41) and the second side rod (42) becomes larger or smaller, thereby realizing unfolding or folding.

4. The folding bracket according to claim 2, characterized in that: The first rear support block (11) is also provided with a first upper connecting part (111) and a first lower connecting part (112). The first upper connecting part (111) is connected to the first seat support rod (21), and the first lower connecting part (112) is connected to the first support leg (31). The second rear support block (12) is also provided with a second upper connecting part (121) and a second lower connecting part (122). The second upper connecting part (121) is connected to the second seat support rod (22), and the second lower connecting part (122) is connected to the second support leg (32).

5. The folding bracket according to claim 2, characterized in that: It also includes a mounting base (19), which is fixedly connected to the first lower rotating plate (114), or the mounting base (19) is fixedly connected to the lower rotating plate (116) or the upper rotating plate (115); the mounting base (19) is provided with a mounting hole, and the other end of the telescopic rod (45) is located in the mounting hole of the mounting base (19).

6. The folding bracket according to any one of claims 1-5, characterized in that: The first rotating assembly (15) includes a first upper rotating component (151) and a first lower rotating component (152), with a gap between the first upper rotating component (151) and the first lower rotating component (152); the second rotating assembly (16) includes a second upper rotating component (161) and a second lower rotating component (162), with a gap between the second upper rotating component (161) and the second lower rotating component (162); one end of the telescopic rod (45) is located between the first upper rotating component (151) and the second lower rotating component (162), the second upper rotating component (161) is located above the first upper rotating component (151), and the first lower rotating component (152) is located below the second lower rotating component (162); the second connecting shaft (18) passes through the second upper rotating component (161), the first upper rotating component (151), one end of the telescopic rod (45), the second lower rotating component (162), and the through hole on the first lower rotating component (152) for hinge connection.

7. The folding bracket according to claim 6, characterized in that: The first front support block (14) includes a first connecting part A (141), a second connecting part A (142), a third connecting part A (143), and a fourth connecting part A (144). The first connecting part A (141) is connected to the first side rod (41), the second connecting part A (142) is hinged to the first front rod (43), the third connecting part A (143) is connected to the fourth seat support rod (24), and the fourth connecting part A (144) is connected to the fourth support leg (34). The second front support block (13) includes a first connecting part B (131), a second connecting part B (132), a third connecting part B (133) and a fourth connecting part B (134). The first connecting part B (131) is connected to the second side rod (42), the second connecting part B (132) is hinged to the second front rod (44), the third connecting part B (133) is connected to the third seat support rod (23), and the fourth connecting part B (134) is connected to the third support leg (33).

8. The folding bracket according to claim 7, characterized in that: The telescopic rod (45) includes an elastic body, an outer tube (451) and an inner tube (452). The inner tube (452) can enter or leave the outer tube (451). The outer tube (451) is provided with an elastic body for the reset of the inner tube (452). The outer wall of the outer tube (451) is provided with a limiting hole. The inner tube (452) is provided with a push button switch (453). Pressing the push button switch (453) causes it to enter the limiting hole, so that the push button switch (453) no longer obstructs the relative movement between the outer tube (451) and the inner tube (452). When the push button switch (453) is not pressed, pressing the push button switch (453) causes it to extend out of the limiting hole, so that the outer tube (451) and the inner tube (452) are locked.

9. The folding bracket according to claim 8, characterized in that: The outer tube (451) is provided with a first passage hole (454) for the second connecting shaft (18) to pass through, and the inner tube is provided with a second passage hole (455) for the first connecting shaft (17) to pass through; or, the first support leg (31), the second support leg (32), the third support leg (33) and the fourth support leg (34) are provided with protective sleeves.

10. A folding chair comprising a folding support and a chair cover (5) as described in any one of claims 2-9, characterized in that: The chair cover (5) is provided with four sleeves, each of which is detachably connected to the first seat support rod (21), the second seat support rod (22), the third seat support rod (23), and the fourth seat support rod (24).

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