Umbrella type folding support and folding chair

Abstract

The utility model relates to an umbrella type folding bracket and a folding chair. The umbrella type folding bracket comprises a base and a plurality of supporting legs which are pivoted around the base and can be unfolded or folded relative to the base, each supporting leg is provided with a locking groove, and each locking groove comprises a locking section and an unlocking section which are communicated with each other; a locking assembly is arranged on the base and comprises a rotary knob located on the outer side of the base, a rod body connected with the rotary knob and penetrating into the base and a locking block connected with the penetrating part of the rod body, and locking parts corresponding to the locking grooves in number are arranged on the periphery of the locking block; each locking part is embedded into the corresponding locking groove and can be rotationally switched between the locking section and the unlocking section; when the supporting legs are located at the unfolding positions, the locking portions enter the locking sections so that the supporting legs can be locked and cannot be folded, at the moment, the rotary knob is rotated in the unlocking direction, the locking portions can be separated from the locking sections and enter the unlocking sections, and then the supporting legs are in the unlocking state and can be folded. The device has the advantages of simple and reasonable structure, high reliability, low failure rate and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to outdoor leisure furniture technical field especially umbrella type folding support and folding chair. BACKGROUND

[0002] Chinese utility model patent CN219556753U discloses a folding assembly for folding chair, which comprises a main seat, a lever, a connecting assembly and a plurality of chair legs, the plurality of chair legs are rotationally connected to the main seat and are equidistantly distributed along the outer side wall of the main seat, a sleeve is movably arranged in the main seat, a plurality of limiting pieces are equidistantly connected to the outer wall of the sleeve in the circumferential direction, each chair leg is provided with a limiting groove facing the limiting pieces, and the lever is connected to the sleeve through the connecting assembly. The connecting assembly comprises a limiting protrusion, a first spring and a second spring, the limiting protrusion is connected to the bottom end of the outer side of the main seat, a first through hole is vertically arranged on the limiting protrusion and penetrates through the bottom end of the main seat and communicates with the inner cavity, the bottom end of the limiting protrusion is provided with a first abutting surface and a second abutting surface, the first abutting surface is lower than the second abutting surface, the second abutting surface is an inclined surface, the second abutting surface and the first abutting surface are smoothly connected, the first spring and the second spring are vertically arranged, the two ends of the first spring are connected to the upper end of the sleeve and the main seat respectively, the two ends of the second spring are connected to the sleeve and the lever respectively, the first spring and the second spring are stretched, the first spring exerts an upward pulling force on the sleeve, the second spring exerts a downward pulling force on the sleeve, a knob is connected to the side wall of the lever in the radial direction, the knob is located below the main seat, the knob is abutted against the first abutting surface or the second abutting surface by rotating the lever, when the knob is abutted against the first abutting surface by rotating the lever, the pulling force of the second spring is greater than that of the first spring, the limiting pieces are clamped into the limiting grooves from top to bottom, when the knob is abutted against the second abutting surface by rotating the lever, the pulling force of the first spring is greater than that of the second spring, the first spring moves the sleeve upward and makes the limiting pieces leave the limiting grooves.

[0003] In the structure, the locking and unlocking of the chair legs adopt the principle of rotary linear motion mechanism, that is, the rotation of the lever is converted into the upward and downward movement of the limiting pieces through the cooperation of the knob and the first abutting surface or the second abutting surface and the pulling force of the second spring or the first spring, thereby realizing the locking or unlocking of the chair legs. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects of the prior art, providing an umbrella type folding support and folding chair, which realizes the locking or unlocking of the supporting legs through a pure rotary motion locking mechanism, thereby reducing intermediate links, improving the reliability during use and reducing the failure rate, and ensuring the simplicity of the structure and reducing the manufacturing cost.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions.

[0006] An umbrella type folding support comprises a base, a plurality of support legs pivotally connected to the base and foldable relative to the base, and a plurality of support rods pivotally connected to each support leg and foldable relative to the support leg; each support leg is provided with a locking groove comprising a locking section and an unlocking section; the base is provided with a locking assembly comprising a knob located outside the base, a rod penetrating into the base and connected to the knob, and a locking block connected to the penetrating part of the rod, the locking block is provided with a plurality of locking portions corresponding to the locking grooves; each locking portion is embedded in the corresponding locking groove and can rotate and switch between the locking section and the unlocking section by rotating the knob; when each support leg is in the unfolded position, the locking portion enters the locking section so that each support leg is locked and cannot be folded; at this time, rotating the knob in the unlocking direction can drive the rod, the locking block and the locking portions around the locking block to rotate together, and make the locking portions leave the locking section and enter the unlocking section, so that each support leg is in the unlocked state and can be folded; and each support leg is further provided with an avoiding groove in communication with the unlocking section; when each support leg is folded, each locking portion enters the corresponding avoiding groove for avoiding, so as to not interfere with the folding of the support leg.

[0007] Further, the locking assembly further comprises a torsion spring in a deflected state when each locking portion enters the unlocking section, so that each locking portion has a tendency to reset to the locking section.

[0008] Further, the outer surface of the base is provided with a recess for accommodating the knob, the periphery of the knob is symmetrically provided with two limiting protrusions, the peripheral wall of the recess is symmetrically provided with two limiting grooves, the two limiting protrusions are respectively and slidingly arranged in the two limiting grooves, and the two limiting grooves each have a first stop wall in the locking direction of the locking portion and a second stop wall in the unlocking direction of the locking portion; when the two limiting protrusions are respectively in abutting cooperation with the first stop walls of the two limiting grooves, the locking portions enter the locking sections and reach the accurate positions; when the two limiting protrusions are respectively in abutting cooperation with the second stop walls of the two limiting grooves, the locking portions enter the unlocking sections and reach the accurate positions.

[0009] Further, the outer surface of the base is further provided with a locking indication mark corresponding to the position of the first stop wall of the two limiting grooves and an unlocking indication mark corresponding to the position of the second stop wall of the two limiting grooves.

[0010] Further, the knob is arranged outside the lower end of the base, and the recess is arranged on the outer surface of the lower end of the base. A through hole is arranged on the lower end wall of the base and penetrates the recess axially to allow the rod to penetrate into the base. The upper end of the knob is provided with an upwardly open cavity. The lower end of the rod extends into the cavity and is integrally connected with the bottom wall of the cavity. The torsion spring comprises a spring body and two torsion arms. The spring body is sleeved on the lower end of the rod and located in the cavity. A first fixing groove is arranged on the peripheral wall of the cavity. A second fixing groove is arranged on the bottom wall of the recess. One of the torsion arms is fixed in the first fixing groove, and the other torsion arm is fixed in the second fixing groove.

[0011] Further, the bottom surface of the knob is provided with a one-bar-shaped handle for a user to hold. The one-bar-shaped handle is in the same vertical plane as the two limiting protrusions, and the two ends of the one-bar-shaped handle are respectively connected with the bottom ends of the two limiting protrusions.

[0012] Further, the upper end of the penetrating portion of the rod is provided with a square segment. A threaded hole is arranged in the center of the top surface of the square segment. The central lower part of the locking block is provided with a square hole that is sleeved on the square segment. The central upper part of the locking block is provided with a stepped through hole corresponding to the threaded hole. A screw is screwed through the stepped through hole and the threaded hole to fix the locking block on the upper end of the penetrating portion of the rod. The upper end wall of the base is provided with a dismounting hole corresponding to the position of the stepped through hole for the screw to be mounted or dismounted.

[0013] Further, the inside of the base is provided with a hollow cavity for accommodating the penetrating portion of the rod, the locking block, and the locking portion around the locking block. The periphery of the base is provided with a plurality of pivot slots that are in communication with the hollow cavity and are outwardly open. Each support leg comprises a leg rod, a cylindrical pivot portion arranged at one end of the leg rod, and a leg pad arranged at the other end of the leg rod. The cylindrical pivot portion of each support leg extends into the corresponding pivot slot and is pivoted with the two side walls of the pivot slot through a first pivot shaft. The outer circular surface of the cylindrical pivot portion of each support leg is provided with the locking slot and the avoiding slot. The locking segment and the unlocking segment of the locking slot are distributed along the axial direction of the cylindrical pivot portion. The avoiding slot is distributed along the circumferential direction of the cylindrical pivot portion and is in perpendicular communication with the unlocking segment. The two sides of the cylindrical pivot portion of each support leg are provided with bevel gear portions. The corresponding side bevel gear portions of the two adjacent support legs are meshed with each other.

[0014] Further, the lower end of each pivot slot is provided with a first stop portion. The first stop portion can stop the unfolded support leg to make the unfolded support leg present a self-top-to-bottom outwardly inclined shape. The upper end of each pivot slot is provided with a second stop portion. The second stop portion can stop the folded support leg to make the folded support leg present a vertical shape along the up-down direction.

[0015] A folding chair, comprising a seat and a chair frame, the chair frame is the umbrella type folding support as described above, the seat is provided with a corresponding number of insertion sleeve parts with the support rod, one end of each support rod is pivoted to the upper part of the corresponding support foot through a second pivot, the other end of each support rod is inserted into the corresponding insertion sleeve part and is fixedly connected therewith through a fastening screw.

[0016] Compared with the prior art, the umbrella type folding support has the following beneficial effects:

[0017] The locking or unlocking of the support foot is realized through the pure rotary motion locking mechanism, that is, the rotary motion of the knob drives the locking part to rotate, the locking part is switched between the locking section and the unlocking section of the locking groove, and then the locking or unlocking of the support foot is realized, compared with the rotary linear motion locking structure in the prior art, since many intermediate links are reduced, on the one hand, the reliability during use can be improved, the failure rate is reduced, on the other hand, the simplicity of the structure can be ensured, the manufacturing cost is reduced, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the unfolded state perspective view of the umbrella type folding support of the utility model.

[0019] Figure 2 is the local enlarged view of the utility model in the locking state of each support foot.

[0020] Figure 3 is the local enlarged view of the utility model in the unlocking state of each support foot.

[0021] Figure 4 is the local sectional view of the utility model umbrella type folding support.

[0022] Figure 5 is the exploded view of the utility model umbrella type folding support.

[0023] Figure 6 is Figure 5 the local enlarged view of A in the utility model.

[0024] Figure 7 is the perspective view of the base in the utility model.

[0025] Figure 8 is the perspective view of the base in the utility model.

[0026] Figure 9 is the perspective view of the base in the utility model.

[0027] Figure 10 is the perspective view of the base in the utility model.

[0028] Figure 11 is the bottom view of the umbrella type folding support of the utility model.

[0029] Figure 12 is Figure 11 the partial enlarged view of B.

[0030] Figure 13 is the folded state perspective view of the umbrella type folding support of the utility model.

[0031] Figure 14 is the perspective view of the folding chair of the utility model. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail by combining with the embodiments given in the drawings.

[0033] As Figures 1 to 13 shown, the utility model provides an umbrella type folding support, including base 1, a plurality of support feet 2 that are pivoted around base 1 and can be unfolded or folded relative to base 1 and a plurality of support rods 3 that are pivoted to each support foot 2 and can be unfolded or folded relative to support foot 2.

[0034] Each support foot 2 is provided with locking groove 21, and locking groove 21 includes locking section 211 and unlocking section 212 that are communicated with each other.Base 1 is provided with locking assembly 4, and locking assembly 4 includes knob 41 located on the outer side of base 1, rod body 42 connected with knob 41 and penetrating into base 1 and locking block 43 connected with the penetration part of rod body 42, and locking block 43 is provided with locking part 431 corresponding to the number of locking groove 21 around it.Each locking part 431 is embedded in the corresponding locking groove 21, and can be switched by rotating each other between locking section 211 and unlocking section 212 according to the rotation of knob 41.When each support foot 2 is in the unfolded position, locking part 431 enters locking section 211 so that each support foot 2 is locked and cannot be folded, at this time, rotating knob 41 in the unlocking direction can drive rod body 42, locking block 43 and locking part 431 around locking block 43 to rotate together, and make locking part 431 separate from locking section 211 and enter unlocking section 212, so as to make each support foot 2 in the unlocked state and can be folded.

[0035] And each support foot 2 is also provided with avoiding groove 22 arranged along the folding or unfolding direction of support foot 2 and communicated with unlocking section 212, and each locking part 431 enters the corresponding avoiding groove 22 for avoiding when each support foot 2 is folded, so that it will not interfere with the folding of support foot 2.

[0036] The locking assembly 4 further comprises a torsion spring 44 in a deflected state when each locking portion 431 enters the unlocking section 212, so as to keep each locking portion 431 in a tendency of returning to the locking section 211. When each support leg 2 is unfolded, each locking portion 431 is first returned from the avoiding groove 22 to the unlocking section 212, and then is returned from the unlocking section 212 to the locking section 211 under the action of the torsion spring 44, thereby locking each support leg 2 and facilitating the unfolding operation of each support leg 2.

[0037] The outer surface of the base 1 is provided with a concave cavity 11 for accommodating the knob 41, the periphery of the knob 41 is symmetrically provided with two limiting protrusions 411, the peripheral wall of the concave cavity 11 is symmetrically provided with two limiting recesses 111, the two limiting protrusions 411 are respectively and slidingly arranged in the two limiting recesses 111, and the two limiting recesses 111 are both provided with a first stop wall 111a in the locking direction of the locking portion 431 and a second stop wall 111b in the unlocking direction of the locking portion 431. When the two limiting protrusions 411 are respectively in abutting cooperation with the first stop walls 111a of the two limiting recesses 111 by rotating the knob 41, the locking portion 431 enters the locking section 211 and reaches the accurate position. When the two limiting protrusions 411 are respectively in abutting cooperation with the second stop walls 111b of the two limiting recesses 111 by rotating the knob 41, the locking portion 431 enters the unlocking section 212 and reaches the accurate position. Therefore, the accuracy of the locking portion 431 when entering the locking section 211 or the unlocking section 212 can be ensured, and the knob 41 can be prevented from being rotated excessively.

[0038] The outer surface of the base 1 is further provided with a locking indication mark 121 corresponding to the position of the first stop wall 111a of the two limiting recesses 111 and an unlocking indication mark 122 corresponding to the position of the second stop wall 111b of the two limiting recesses 111. Through the locking indication mark 121 and the unlocking indication mark 122, the user can determine whether the locking portion 431 is currently in the locking section 211 or in the unlocking section 212, and whether the locking portion 431 accurately reaches the locking section 211 or the unlocking section 212 by the position of the knob 41.

[0039] The knob 41 is arranged outside the lower end of the base 1, and the recess 11 is arranged on the outer surface of the lower end of the base 1. A through hole 13 is arranged on the lower end wall of the base 1 and penetrates the recess 11 axially to allow the rod 42 to penetrate into the base 1. The upper end of the knob 41 is provided with an upwardly open cavity 412, the lower end of the rod 42 extends into the cavity 412 and is integrally connected with the bottom wall of the cavity 412. The torsion spring 44 includes a spring body 441 and two torsion arms 442 and 443. The spring body 441 is sleeved on the lower end of the rod 42 and located in the cavity 412. A first fixing groove 4121 is arranged on the peripheral wall of the cavity 412, and a second fixing groove 112 is arranged on the bottom wall of the recess 11. One of the torsion arms 442 is fixed in the first fixing groove 4121, and the other torsion arm 443 is fixed in the second fixing groove 112. When the knob 41 is rotated towards the unlocking direction and the locking portions 431 enter the unlocking section 212, the torsion spring 44 is deflected with the rotation of the knob 41, so that the locking portions 431 maintain the tendency to return to the locking section 211.

[0040] The bottom surface of the knob 41 is provided with a one-bar-shaped handle 413 for the user to hold. The one-bar-shaped handle 413 is in the same vertical plane as the two limiting protrusions 411, and the two ends of the one-bar-shaped handle 413 are connected to the bottom ends of the two limiting protrusions 411, respectively.

[0041] The penetrating portion of the rod 42 is provided with a square section 421 at the upper end. A threaded hole 4211 is arranged in the center of the top surface of the square section 421. The central lower part of the locking block 43 is provided with a square hole 432 sleeved on the square section 421. The central upper part of the locking block 43 is provided with a stepped through hole 433 corresponding to the threaded hole 4211. A screw 5 is threadedly connected through the stepped through hole 433 and the threaded hole 4211, so as to fix the locking block 43 at the upper end of the penetrating portion of the rod 42. The upper end wall of the base 1 is provided with a dismounting hole 14 corresponding to the position of the stepped through hole 433 for the screw 5 to be mounted or dismounted. That is, the screw 5 can be mounted into the base 1 from the dismounting hole 14, then penetrate through the stepped through hole 433 and be screwed into the threaded hole 4211. Meanwhile, the screw 5 can also be dismounted from the base 1 after being dismounted from the threaded hole 4211 and the stepped through hole 433 through the dismounting hole 14, so as to facilitate the installation of the locking assembly 4.

[0042] The base 1 is internally provided with a hollow cavity 101 for accommodating the penetrating part of the rod body 42, the locking block 43 and the locking part 431 around the locking block 43, and is externally provided with a plurality of pivot slots 102 in communication with the hollow cavity 101 and in an open shape. Each support leg 2 comprises a leg rod 2a, a cylindrical pivot part 2b arranged at one end of the leg rod 2a and a leg pad 2c arranged at the other end of the leg rod 2a. The cylindrical pivot part 2b of each support leg 2 extends into the corresponding pivot slot 102 and is pivotally connected to the two side walls 1021, 1022 of the pivot slot 102 through a first pivot shaft 6. The outer circular surface of the cylindrical pivot part 2b of each support leg 2 is provided with a locking slot 21 and an avoiding slot 22. The locking section 211 and the unlocking section 212 of the locking slot 21 are distributed along the axial direction of the cylindrical pivot part 2b. The avoiding slot 22 is distributed along the circumferential direction of the cylindrical pivot part 2b and is in perpendicular communication with the unlocking section 212. The two sides of the cylindrical pivot part 2b of each support leg 2 are provided with bevel gear parts 2b1. The corresponding side bevel gear parts 2b1 of two adjacent support legs 2 are meshed with each other, so that each support leg 2 can be linked to be folded or unfolded.

[0043] The lower end of each pivot slot 102 is provided with a first stop part 1023. The first stop part 1023 can stop the unfolded support leg 2, so that the unfolded support leg 2 is inclined outward from top to bottom. The upper end of each pivot slot 102 is provided with a second stop part 1024. The second stop part 1024 can stop the folded support leg 2, so that the folded support leg 2 is vertical along the up-down direction.

[0044] As shown in Figure 1 , Figure 13 and Figure 14 , a folding chair comprises a chair surface 7 and a chair frame 8. The chair surface 7 is made of cloth, and the chair frame 8 is an umbrella type folding support as described above. The chair surface 7 is provided with a plurality of sleeve parts 71 corresponding to the number of support rods 3. One end of each support rod 3 is pivotally connected to the upper part of the corresponding support leg 2 through a second pivot shaft 9. The other end of each support rod 3 is inserted into the corresponding sleeve part 71 and is fixedly connected thereto through a fastening screw 72. When the folding chair is stored, the chair surface 7 and the chair frame 8 can be separated by loosening each fastening screw 72. The separated chair surface 7 can be rolled up for storage. The separated chair frame 8 can be used to fold each support rod 3 into the pre-designed accommodating groove 200 of each support leg 2, and can also be used to unlock each support leg 2 and fold them together upward.

[0045] The above description is only a preferred embodiment of the present application, and cannot limit the scope of the present application. Any simple equivalent changes and modifications made according to the patent application scope and the description of the present application are still within the scope of the present application.

Claims

1. An umbrella-type folding bracket, comprising a base, a plurality of support legs pivotally connected to the base and capable of being expanded or retracted relative to the base, and a plurality of support rods pivotally connected to each support leg and capable of being expanded or retracted relative to the support legs; characterized in that: Each support leg is provided with a locking groove, which includes a locking section and an unlocking section that are interconnected. The base is provided with a locking assembly, which includes a knob located on the outside of the base, a rod connected to the knob and inserted into the base, and a locking block connected to the insertion part of the rod. The locking block is surrounded by locking parts corresponding to the number of locking slots. Each locking part is embedded in a corresponding locking groove and can rotate and switch between the locking section and the unlocking section according to the rotation of the knob; When each support leg is in the extended position, the locking part enters the locking section, locking each support leg and preventing it from retracting. At this time, turning the knob in the unlocking direction can drive the rod, the locking block and the locking part around the locking block to rotate together, causing the locking part to disengage from the locking section and enter the unlocking section, thereby allowing each support leg to be in the unlocked state and retractable. Furthermore, each support leg is provided with a clearance groove that communicates with the unlocking section. When each support leg is retracted, the locking part enters the corresponding clearance groove to make clearance, so as not to interfere with the retraction of the support leg.

2. The umbrella-type folding bracket according to claim 1, characterized in that: The locking assembly also includes a torsion spring that is deflected when each locking part enters the unlocking section, thereby causing each locking part to maintain a tendency to reset towards the locking section.

3. The umbrella-type folding bracket according to claim 2, characterized in that: The outer surface of the base is provided with a cavity for accommodating the knob. Two limiting protrusions are symmetrically provided around the periphery of the knob. Two limiting grooves are symmetrically provided on the peripheral wall of the cavity. The two limiting protrusions are slidably placed in the two limiting grooves respectively. Each of the two limiting grooves has a first stop wall in the locking direction of the locking part and a second stop wall in the unlocking direction of the locking part. When the two limiting protrusions abut against the first stop walls of the two limiting grooves respectively, the locking part enters the locking section and reaches the accurate position. When the two limiting protrusions abut against the second stop walls of the two limiting grooves respectively, the locking part enters the unlocking section and reaches the accurate position.

4. The umbrella-type folding bracket according to claim 3, characterized in that: The outer surface of the base is also provided with a locking indicator corresponding to the position of the first stop wall of the two limiting grooves and an unlocking indicator corresponding to the position of the second stop wall of the two limiting grooves.

5. An umbrella-type folding bracket according to claim 3 or 4, characterized in that: The knob is located on the lower outer side of the base. Correspondingly, the cavity is located on the lower outer surface of the base. The lower wall of the base has a through hole that axially communicates with the cavity to allow the rod to pass through the base. The upper end of the knob has an upwardly open cavity. The lower end of the rod extends into the cavity and is integrally connected to the bottom wall of the cavity. The torsion spring includes a spring body and two torsion arms. The spring body is sleeved on the lower end of the rod and embedded in the cavity. A first fixing groove is formed on the peripheral wall of the cavity, and a second fixing groove is formed on the bottom wall of the cavity. One torsion arm is fixed to the first fixing groove, and the other torsion arm is fixed to the second fixing groove.

6. The umbrella-type folding bracket according to claim 5, characterized in that: The bottom surface of the knob is provided with a straight grip for the user to hold. The straight grip and the two limiting protrusions are on the same vertical plane, and the two ends of the straight grip are respectively connected to the bottom ends of the two limiting protrusions.

7. The umbrella-type folding bracket according to claim 5, characterized in that: The upper end of the rod's insertion part is provided with a square segment, and the top surface of the square segment is provided with a threaded hole. The lower center of the locking block is provided with a square hole that fits onto the square segment. The upper center of the locking block is provided with a stepped through hole corresponding to the threaded hole. A screw passes through the stepped through hole and is threaded into the threaded hole, thereby fixing the locking block to the upper end of the rod's insertion part. The upper end wall of the base is provided with a disassembly hole corresponding to the position of the stepped through hole for the screw to be inserted or removed.

8. The umbrella-type folding bracket according to claim 1, characterized in that: The base has an internal cavity for accommodating the rod, the locking block, and the locking portion around the locking block. The base has several pivot grooves around its perimeter that communicate with the hollow cavities and are open outwards. Each support leg includes a leg rod, a cylindrical pivot portion at one end of the leg rod, and a foot pad at the other end of the leg rod. The cylindrical pivot portion of each support leg extends into the corresponding pivot groove and is pivotally connected to the two side walls of the pivot groove via a first pivot. The outer circumferential surface of the cylindrical pivot portion of each support leg has the locking groove and the clearance groove. The locking and unlocking sections of the locking groove are distributed along the axial direction of the cylindrical pivot portion, and the clearance groove is distributed along the circumferential direction of the cylindrical pivot portion and communicates perpendicularly with the unlocking section. The cylindrical pivot portion of each support leg has conical teeth on both sides, and the corresponding conical teeth of two adjacent support legs mesh with each other.

9. The umbrella-type folding bracket according to claim 8, characterized in that: Each pivot groove has a first stop at its lower end, which can stop the unfolded support leg so that the unfolded support leg is inclined outward from top to bottom; each pivot groove has a second stop at its upper end, which can stop the folded support leg so that the folded support leg is vertical in the vertical direction.

10. A folding chair, comprising a seat and a frame, characterized in that: The chair frame is an umbrella-type folding bracket as described in any one of claims 1-9. The chair surface is provided with a sleeve portion corresponding to the number of support rods. One end of each support rod is pivotally connected to the upper part of the corresponding support leg via a second pivot. The other end of each support rod is inserted into the corresponding sleeve portion and fixedly connected thereto by fastening screws.

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