Folding frame and folding chair

Abstract

This utility model relates to a folding bracket and a folding chair, including a crossbar assembly and two symmetrically arranged folding components. Each folding component includes a fixed base, at least two support legs, and at least two support rods. The fixed base is connected to the crossbar assembly, and the support legs and support rods are hinged to the fixed base. Each support leg and support rod is fitted with a limiting sleeve. The fixed base has an outwardly extending positioning element, which is fixedly connected to the fixed base. In the unfolded state, the limiting sleeve is fitted onto the positioning element. The folding bracket and folding chair obtained by this utility model have the following advantages: the limiting sleeve is used to fix the positioning element to the support leg or support rod. The limiting sleeve only needs to simultaneously wrap around the support leg and positioning element, as well as the support rod and positioning element, thus both restricting the rotation of the support leg and support rod after unfolding and improving the overall structural strength and load-bearing capacity in the unfolded state. When folding, simply pull out the limiting sleeve from the positioning element, and the support leg and support rod can be folded inward.

Description

Technical Field

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

[0002] With the rapid development of my country's national economy and the continuous improvement of people's living standards, more and more people are taking advantage of their leisure time to travel, go on vacation, camp in the wild, or go to the beach to play in the waves. Regardless of the form, it has become essential for people to sit down and rest after entertainment, combining entertainment with leisure.

[0003] In existing technologies, the unfolded state of folding chairs usually requires bolts or clips for fixing. Bolt fixing is relatively troublesome to install and remove, while clip connection is not strong enough, resulting in low load-bearing capacity of the chair. Utility Model Content

[0004] One objective of this application is to provide a folding bracket and a folding chair that can be easily fixed in the unfolded state while improving load-bearing capacity.

[0005] The technical solution adopted in this application is as follows: a folding bracket, including a crossbar assembly and two symmetrically arranged folding assemblies. Each folding assembly includes a fixed base, at least two support legs, and at least two support rods. The fixed base is connected to the crossbar assembly, and the support legs and support rods are hinged to the fixed base. The fixed base is provided with an outwardly extending positioning member, which is fixedly connected to the fixed base. The support legs and support rods are each fitted with a limiting sleeve, or the positioning member is fitted with a limiting sleeve. In the unfolded state, the limiting sleeve is simultaneously fitted on the positioning member and the support legs, as well as on the positioning member and the support rods.

[0006] Compared with the prior art, the advantages of this application are that the limiting sleeve is used to fix the positioning component to the support leg or support rod. The limiting sleeve only needs to wrap around the support leg and positioning component, as well as the support rod and positioning component at the same time. This not only restricts the rotation of the support leg and support rod after they are unfolded, but also improves the overall structural strength and load-bearing capacity in the unfolded state. When folding, the limiting sleeve can be pulled out to detach from the positioning component or the support leg and support rod, and the support leg and support rod can then be folded inward, making it convenient to use. In the unfolded state, the limiting sleeve simultaneously covers the positioning component and the support leg, preventing the support leg from rotating freely. Similarly, the limiting sleeve also simultaneously covers the positioning component and the support rod, preventing the support rod from rotating freely, ensuring reliable unfolding.

[0007] In some embodiments of this application, both the support leg and the support rod are provided with blocking elements, and the limiting sleeve is located between the blocking elements and the fixed seat.

[0008] Furthermore, an elastic element in a compressed state is provided between the blocking element and the limiting sleeve, with one end of the elastic element fitting against the blocking element and the other end fitting against the limiting sleeve.

[0009] In some embodiments of this application, the positioning member is provided with a blocking member, and the limiting sleeve is located between the blocking member and the fixing seat; an elastic member in a compressed state is provided between the limiting sleeve and the fixing seat, one end of the elastic member is fitted with the limiting sleeve, and the other end is fitted with the fixing seat. In some embodiments of this application, the positioning element is a semi-circular tube with its radial opening facing the center of the crossbar assembly. In the unfolded state, both the support leg and the support rod are in contact with the inner diameter surface of the semi-circular tube; both the support leg and the support rod are hinged to the semi-circular tube.

[0010] In some embodiments of this application, two symmetrically arranged support rods are a pair, and at least one pair of support rods is telescopic.

[0011] In some embodiments of this application, the limiting sleeve is provided with a baffle on the side away from the fixed seat, and the baffle is provided with a through hole to accommodate the support leg or support rod.

[0012] In some embodiments of this application, the limiting sleeve is provided with an elastic element in a stretched state, one end of the elastic element is connected to the limiting sleeve, and the other end of the elastic element is connected to the support leg or the support rod.

[0013] Furthermore, both the support leg and the support rod are provided with guide rails, and the limiting sleeve is provided with sliding blocks that cooperate with the guide rails. The sliding blocks are connected to the limiting sleeve and the elastic element respectively. Both the support leg and the support rod are rotatably connected to the positioning element through a rotating shaft. The other end of the elastic element is connected to the rotating shaft, which is located between the limiting sleeve and the crossbar assembly.

[0014] In some embodiments of this application, the crossbar assembly includes a left sleeve, a right sleeve, and a connector. The left sleeve and the right sleeve are arranged to the left and right of the connector, and the left sleeve and / or the right sleeve are rotatably connected to the connector.

[0015] Furthermore, the left sleeve is provided with a first rotating groove, which is arranged around the circumference of the left sleeve. The connector is provided with a first limiting member that cooperates with the first rotating groove. One end of the first limiting member is located on the first rotating groove, and the other end is connected to the connector.

[0016] Furthermore, the right sleeve is provided with a second rotating groove, which is arranged around the circumference of the right sleeve. The connector is provided with a second limiting member that cooperates with the second rotating groove. One end of the second limiting member is located on the second rotating groove, and the other end is connected to the connector.

[0017] A folding chair, comprising the aforementioned folding support frame. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model; Figure 2 This is a cross-sectional view of the elastic element mounting structure of Embodiment 1 of this utility model; Figure 3 This is a bottom view of Embodiment 1 of this utility model; Figure 4 yes Figure 3 A cross-sectional view along the AA direction; Figure 5 This is a structural schematic diagram of Embodiment 2 of the present invention; Figure 6 This is a cross-sectional view of Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the folded state of Embodiment 2 of this utility model; Figure 8 This is a bottom view of Embodiment 2 of this utility model; Figure 9 This is a structural schematic diagram of Embodiment 3 of the present invention; Figure 10 This is a schematic diagram of the folded state of Embodiment 3 of this utility model.

[0019] In the diagram: 1. Crossbar assembly; 2. Folding assembly; 3. Fixing base; 4. Support leg; 5. Support rod; 6. Limiting sleeve; 7. Positioning component; 8. Blocking component; 9. Elastic component; 10. Baffle; 11. Through hole; 12. Left sleeve; 13. Right sleeve; 14. Connecting component; 15. First rotating groove; 16. First limiting component; 17. Second rotating groove; 18. Second limiting component; 19. Guide rail; 20. Sliding block; 21. Rotating shaft. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0021] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0022] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0023] Example 1: This embodiment provides a folding bracket, such as Figure 1 , Figure 2 As shown, the assembly includes a crossbar assembly 1 and two symmetrically arranged folding assemblies 2. Each folding assembly 2 includes a fixed base 3, at least two support legs 4, and at least two support rods 5. The fixed base 3 is connected to the crossbar assembly 1. The support legs 4 and support rods 5 are hinged to the fixed base 3. Each support leg 4 and support rod 5 is fitted with a limiting sleeve 6. The fixed base 3 is provided with an outwardly extending positioning element 7, which is fixedly connected to the fixed base 3. In the unfolded state, the limiting sleeve 6 is fitted onto the positioning element 7. In this embodiment, two support legs 4 are provided on each side, and two support rods 5 are provided on each side. The fixed base 3 is cylindrical with one end face recessed to mate with one end of the crossbar assembly 1. The support legs 4 on both sides are staggered in the circumferential direction of the fixed base 3, and the support rods 5 on both sides are staggered in the circumferential direction of the fixed base 3. The positioning element 7 is stepped, and the bottom surface of the limiting sleeve 6 is in contact with one of the stepped surfaces of the positioning element 7.

[0024] The limiting sleeve 6 can slide relative to the support leg 4 or support rod 5. The limiting sleeve 6 is used to fix the positioning piece 7 to the support leg 4 or support rod 5. The limiting sleeve 6 only needs to wrap around the support leg 4 and the positioning piece 7, as well as the support rod 5 and the positioning piece 7, to both restrict the rotation of the support leg 4 and support rod 5 after unfolding and improve the overall structural strength and load-bearing capacity in the unfolded state. When folding, simply pull out the limiting sleeve 6 to detach it from the positioning piece 7, and the support leg 4 and support rod 5 can be folded inward, making it convenient to use. In the unfolded state, the limiting sleeve 6 simultaneously covers the positioning piece 7 and the support leg 4, preventing the support leg 4 from rotating freely. Similarly, the limiting sleeve 6 also simultaneously covers the positioning piece 7 and the support rod 5, preventing the support rod 5 from rotating freely, ensuring reliable unfolding.

[0025] To ensure reliable fixation of the limiting sleeve 6, the limiting sleeve 6 is provided with an elastic element 9 in a stretched state. One end of the elastic element 9 is connected to the limiting sleeve 6, and the other end is connected to the support leg 4 or the support rod 5. When the elastic element 9 is in a stretched state, one end of the elastic element 9 pulls on the limiting sleeve 6, and the other end pulls on the support leg 4 or the support rod 5, giving the limiting sleeve 6 a tendency to move towards the positioning element 7. This allows the limiting sleeve 6 to automatically fit onto the positioning element 7, ensuring the reliability of the unfolded structure and preventing the limiting sleeve 6 from slipping out.

[0026] In this embodiment, the elastic element 9 is a spring; the elastic element 9 located on the support leg 4 is connected to the support leg 4, and the elastic element 9 located on the support rod 5 is connected to the support rod 5; the elastic element 9 is located between the limiting sleeve 6 and the crossbar assembly 1.

[0027] To ensure the reliable use of the elastic element 9, both the support leg 4 and the support rod 5 are equipped with guide rails 19, and the limiting sleeve 6 is equipped with a sliding block 20 that cooperates with the guide rail 19. The sliding block 20 is connected to both the limiting sleeve 6 and the elastic element 9. The support leg 4 and the support rod 5 are rotatably connected to the positioning element 7 via a rotating shaft 21. The other end of the elastic element 9 is connected to the rotating shaft 21, which is located between the limiting sleeve 6 and the crossbar assembly 1. The guide rail 19 and the sliding block 20 cooperate to guide the movement of the limiting sleeve 6. At the same time, the guide rail 19 is used to connect with the elastic element 9 to ensure the tension of the elastic element 9 on the limiting sleeve 6.

[0028] In this embodiment, the support leg 4 and the support rod 5 are round tubes; the guide rail 19 has a long waist hole that penetrates the two side walls of the support leg 4 and the support rod 5; the sliding block 20 is a round rod that passes through the long waist hole and its two ends protrude through the long waist hole and connect with the limiting sleeve 6; the elastic element 9 is located inside the round tube.

[0029] To make the seat more comfortable and more compact when folded, two symmetrically arranged support rods 5 form a pair, and at least one pair of support rods 5 adopts a telescopic type, such as a conventional sleeve telescopic type. When the extension is in place, a tumbler lock is used, similar to the folding handle of a folding umbrella.

[0030] In this embodiment, the pair of support rods 5 are telescopic. When unfolded, one pair of support rods 5 is high and the other pair is low, so that the arrangement of the seat fabric is also from high to low, which is more in line with the human body's sitting and lying posture and is more comfortable to use.

[0031] To facilitate folding, such as Figure 3 , Figure 4As shown, the crossbar assembly 1 includes a left sleeve 12, a right sleeve 13, and a connector 14. The left sleeve 12 and right sleeve 13 are arranged to the left and right of the connector 14. The left sleeve 12 and / or right sleeve 13 are rotatably connected to the connector 14. The outward-facing ends of the left sleeve 12 and right sleeve 13 are connected to the fixed base 3. By rotating the left sleeve 12 and right sleeve 13 relative to each other, the support legs 4 and support rods 5 on both sides can be misaligned to prevent interference between the support legs 4 and support rods 5 on both sides during folding, thus reducing the space occupied after folding.

[0032] In this embodiment, both the left sleeve 12 and the right sleeve 13 are rotatably connected to the connector 14. Of course, it is also possible that the left sleeve 12 is rotatably connected to the connector 14 and the right sleeve 13 is fixedly connected to the connector 14, or the right sleeve 13 is rotatably connected to the connector 14 and the left sleeve 12 is fixedly connected to the connector 14. All of these can achieve the function of the support legs 4 and support rods 5 on both sides being misaligned.

[0033] In this embodiment, the connector 14, left sleeve 12, and right sleeve 13 are all round tubes, which are easy to procure and have low cost. The left sleeve 12 is fitted onto the connector 14, and the right sleeve 13 is fitted onto the connector 14, which is a fitting design that facilitates assembly. The diameters of the left sleeve 12 and the right sleeve 13 are the same, and the right end face of the left sleeve 12 fits against the left end face of the right sleeve 13, making the left sleeve 12 and the right sleeve 13 appear as a single piece, resulting in a simple appearance. The fitting of the end faces of the left sleeve 12 and the right sleeve 13 prevents the user's fingers from getting stuck between the left sleeve 12 and the right sleeve 13, improving safety. Of course, the connector 14 can also be a solid cylinder to improve structural strength. The left sleeve 12 and the right sleeve 13 are on the same straight line, which is aesthetically pleasing and has good structural strength. The left sleeve 12 and the right sleeve 13 are symmetrically arranged relative to the connector 14, resulting in balanced forces on both sides and extending service life.

[0034] To ensure reliable rotation of the left sleeve 12, a first rotation groove 15 is provided on the left sleeve 12. The first rotation groove 15 is arranged circumferentially on the left sleeve 12. A first limiting member 16 is provided on the connecting member 14 to cooperate with the first rotation groove 15. One end of the first limiting member 16 is located on the first rotation groove 15, and the other end is connected to the connecting member 14. In this embodiment, the first limiting member 16 is a cylinder, and the first rotation groove 15 is an elongated hole. The cooperation between the first rotation groove 15 and the first limiting member 16 restricts the rotation angle of the left sleeve 12, facilitating the user's rotation operation, while preventing rotation beyond the range and ensuring that the support legs 4 and support rods 5 on both sides can be staggered after rotation. The circumferential arrangement of the first rotation groove 15 ensures reliable circumferential rotation of the left sleeve 12, and the part of the first limiting member 16 is located within the first rotation groove 15 to prevent the left sleeve 12 from coming out.

[0035] To ensure reliable rotation of the right sleeve 13, a second rotation groove 17 is provided on the right sleeve 13. The second rotation groove 17 is arranged circumferentially on the right sleeve 13. A second limiting member 18 is provided on the connecting member 14 to cooperate with the second rotation groove 17. One end of the second limiting member 18 is located on the second rotation groove 17, and the other end is connected to the connecting member 14. In this embodiment, the second limiting member 18 is a cylinder, and the second rotation groove 17 is an elongated hole. The cooperation between the second rotation groove 17 and the second limiting member 18 restricts the rotation angle of the right sleeve 13, facilitating the user's rotation operation, while preventing rotation beyond the range and ensuring that the support legs 4 and support rods 5 on both sides can be staggered after rotation. The circumferential arrangement of the second rotation groove 17 ensures reliable circumferential rotation of the right sleeve 13, and the part of the second limiting member 18 is located within the second rotation groove 17 to prevent the right sleeve 13 from coming out.

[0036] When the left sleeve 12 rotates alone, a first rotation groove 15 is provided on the left sleeve 12, while a second rotation groove 17 is not provided on the right sleeve 13; when the right sleeve 13 rotates alone, a second rotation groove 17 is provided on the right sleeve 13, while a first rotation groove 15 is not provided on the left sleeve 12; in this embodiment, the first rotation groove 15 of the left sleeve 12 and the second rotation groove 17 of the right sleeve 13 are arranged simultaneously, so that the left sleeve 12 and the right sleeve 13 can rotate at the same time, and the left sleeve 12 and the right sleeve 13 have the same structure, which is convenient for processing and assembly.

[0037] Example 2: This embodiment provides a folding bracket, such as Figure 5 , Figure 6 , Figure 7 As shown, the assembly includes a crossbar assembly 1 and two symmetrically arranged folding assemblies 2. Each folding assembly 2 includes a fixed base 3, at least two support legs 4, and at least two support rods 5. The fixed base 3 is connected to the crossbar assembly 1. Both support legs 4 and support rods 5 are hinged to the fixed base 3. Limiting sleeves 6 are fitted onto both support legs 4 and support rods 5. The fixed base 3 has outwardly extending positioning elements 7, which are fixedly connected to the fixed base 3. In the unfolded state, the limiting sleeves 6 are fitted onto the positioning elements 7. In this embodiment, two support legs 4 are provided on each side, and two support rods 5 are provided on each side. The fixed base 3 is cylindrical with one end face recessed to mate with one end of the crossbar assembly 1. The support legs 4 on both sides are staggered in the circumferential direction of the fixed base 3, and the support rods 5 on both sides are staggered in the circumferential direction of the fixed base 3.

[0038] The limiting sleeve 6 can slide relative to the support leg 4 or support rod 5. The limiting sleeve 6 is used to fix the positioning piece 7 to the support leg 4 or support rod 5. The limiting sleeve 6 only needs to wrap around the support leg 4 and the positioning piece 7, as well as the support rod 5 and the positioning piece 7, to both restrict the rotation of the support leg 4 and support rod 5 after unfolding and improve the overall structural strength and load-bearing capacity in the unfolded state. When folding, simply pull out the limiting sleeve 6 to detach it from the positioning piece 7, and the support leg 4 and support rod 5 can be folded inward, making it convenient to use. In the unfolded state, the limiting sleeve 6 simultaneously covers the positioning piece 7 and the support leg 4, preventing the support leg 4 from rotating freely. Similarly, the limiting sleeve 6 also simultaneously covers the positioning piece 7 and the support rod 5, preventing the support rod 5 from rotating freely, ensuring reliable unfolding.

[0039] To ensure reliable installation of the limiting sleeve 6, both the support leg 4 and the support rod 5 are equipped with blocking elements 8, and the limiting sleeve 6 is located between the blocking element 8 and the fixing seat 3. The blocking element 8 is used to block the limiting sleeve 6 and prevent it from detaching from the support leg 4 and the support rod 5.

[0040] To ensure reliable engagement of the limiting sleeve 6 with the positioning member 7, an elastic member 9 in a compressed state is provided between the blocking member 8 and the limiting sleeve 6. One end of the elastic member 9 is in contact with the blocking member 8, and the other end is in contact with the limiting sleeve 6. The elastic member 9 is used to push the limiting sleeve 6, giving it a tendency to move towards the positioning member 7, thus enabling the limiting sleeve 6 to automatically engage with the positioning member 7 and ensuring the reliability of the unfolded structure.

[0041] In this embodiment, the elastic element 9 is a compression spring; the blocking element 8 is annular and sleeved on the support leg 4 or support rod 5. The annular area is large, the blocking effect is good, and one end of the compression spring can be fully attached to the blocking element 8, providing better support.

[0042] To ensure the reliability of the positioning component 7, it is a semi-circular tube with its radial opening facing the center of the crossbar assembly 1. In the unfolded state, both the support legs 4 and the support rods 5 are in contact with the inner diameter surface of the semi-circular tube; both the support legs 4 and the support rods 5 are hinged to the semi-circular tube. In this embodiment, the angle between the semi-circular tube and the crossbar assembly 1 is greater than 90°, which means that in the unfolded state, the support legs 4 and support rods 5 on both sides open outwards, resulting in better stability for the support legs 4, easier fabric placement on the support rods 5, and a larger fabric area, making it more comfortable for the user to sit or lie down; the support legs 4 and support rods 5 are made of circular tubes. The good fit between the semi-circular tube positioning component 7 and the support legs 4 and support rods 5, with a large contact area, results in good support.

[0043] To make the seat more comfortable and more compact when folded, two symmetrically arranged support rods 5 form a pair, and at least one pair of support rods 5 adopts a telescopic type, such as a conventional sleeve telescopic type. When the extension is in place, a tumbler lock is used, similar to the folding handle of a folding umbrella.

[0044] In this embodiment, the pair of support rods 5 are telescopic. When unfolded, one pair of support rods 5 is high and the other pair is low, so that the arrangement of the seat fabric is also from high to low, which is more in line with the human body's sitting and lying posture and is more comfortable to use.

[0045] To ensure the structural reliability of the limiting sleeve 6, a baffle 10 is provided on the side of the limiting sleeve 6 away from the fixed base 3. The baffle 10 has a through hole 11 to accommodate the support leg 4 or the support rod 5. The design of the baffle 10 allows one end of the compression spring to fully fit against the baffle 10, providing better support. At the same time, it prevents the positioning member 7 from passing through the limiting sleeve 6, thus serving as a limiting device for the installation of the limiting sleeve 6.

[0046] To facilitate folding, the crossbar assembly 1 includes a left sleeve 12, a right sleeve 13, and a connector 14. The left sleeve 12 and right sleeve 13 are arranged to the left and right of the connector 14. The left sleeve 12 and / or right sleeve 13 are rotatably connected to the connector 14, and the outward-facing ends of the left sleeve 12 and right sleeve 13 are connected to the fixed base 3. The relative rotation between the left sleeve 12 and right sleeve 13 allows the support legs 4 and support rods 5 on both sides to be misaligned, preventing interference between them during folding and reducing space occupation after folding.

[0047] In this embodiment, both the left sleeve 12 and the right sleeve 13 are rotatably connected to the connector 14. Of course, it is also possible that the left sleeve 12 is rotatably connected to the connector 14 and the right sleeve 13 is fixedly connected to the connector 14, or the right sleeve 13 is rotatably connected to the connector 14 and the left sleeve 12 is fixedly connected to the connector 14. All of these can achieve the function of the support legs 4 and support rods 5 on both sides being misaligned.

[0048] In this embodiment, the connector 14, left sleeve 12, and right sleeve 13 are all round tubes, which are easy to procure and have low cost. The left sleeve 12 is fitted onto the connector 14, and the right sleeve 13 is fitted onto the connector 14, which is a fitting design that facilitates assembly. The diameters of the left sleeve 12 and the right sleeve 13 are the same, and the right end face of the left sleeve 12 fits against the left end face of the right sleeve 13, making the left sleeve 12 and the right sleeve 13 appear as a single piece, resulting in a simple appearance. The fitting of the end faces of the left sleeve 12 and the right sleeve 13 prevents the user's fingers from getting stuck between the left sleeve 12 and the right sleeve 13, improving safety. Of course, the connector 14 can also be a solid cylinder to improve structural strength. The left sleeve 12 and the right sleeve 13 are on the same straight line, which is aesthetically pleasing and has good structural strength. The left sleeve 12 and the right sleeve 13 are symmetrically arranged relative to the connector 14, resulting in balanced forces on both sides and extending service life.

[0049] To ensure reliable rotation of the left sleeve 12, such as Figure 8As shown, the left sleeve 12 is provided with a first rotating groove 15, which is arranged circumferentially around the left sleeve 12. The connector 14 is provided with a first limiting member 16 that cooperates with the first rotating groove 15. One end of the first limiting member 16 is located on the first rotating groove 15, and the other end is connected to the connector 14. In this embodiment, the first limiting member 16 is a cylinder, and the first rotating groove 15 is an elongated hole. The cooperation between the first rotating groove 15 and the first limiting member 16 restricts the rotation angle of the left sleeve 12, which facilitates the user's rotation operation and prevents the rotation from exceeding the range, ensuring that the support legs 4 and support rods 5 on both sides can be staggered after rotation. The circumferential arrangement of the first rotating groove 15 can ensure reliable circumferential rotation of the left sleeve 12. The part of the first limiting member 16 is inside the first rotating groove 15, which can prevent the left sleeve 12 from coming out.

[0050] To ensure reliable rotation of the right sleeve 13, a second rotation groove 17 is provided on the right sleeve 13. The second rotation groove 17 is arranged circumferentially on the right sleeve 13. A second limiting member 18 is provided on the connecting member 14 to cooperate with the second rotation groove 17. One end of the second limiting member 18 is located on the second rotation groove 17, and the other end is connected to the connecting member 14. In this embodiment, the second limiting member 18 is a cylinder, and the second rotation groove 17 is an elongated hole. The cooperation between the second rotation groove 17 and the second limiting member 18 restricts the rotation angle of the right sleeve 13, facilitating the user's rotation operation, while preventing rotation beyond the range and ensuring that the support legs 4 and support rods 5 on both sides can be staggered after rotation. The circumferential arrangement of the second rotation groove 17 ensures reliable circumferential rotation of the right sleeve 13, and the part of the second limiting member 18 is located within the second rotation groove 17 to prevent the right sleeve 13 from coming out.

[0051] When the left sleeve 12 rotates alone, a first rotation groove 15 is provided on the left sleeve 12, while a second rotation groove 17 is not provided on the right sleeve 13; when the right sleeve 13 rotates alone, a second rotation groove 17 is provided on the right sleeve 13, while a first rotation groove 15 is not provided on the left sleeve 12; in this embodiment, the first rotation groove 15 of the left sleeve 12 and the second rotation groove 17 of the right sleeve 13 are arranged simultaneously, so that the left sleeve 12 and the right sleeve 13 can rotate at the same time, and the left sleeve 12 and the right sleeve 13 have the same structure, which is convenient for processing and assembly.

[0052] The remaining technical features are the same as in Example 1.

[0053] Example 3: This embodiment provides a folding bracket, such as Figure 9 , Figure 10As shown, the assembly includes a crossbar assembly 1 and two symmetrically arranged folding assemblies 2. Each folding assembly 2 includes a fixed base 3, at least two support legs 4, and at least two support rods 5. The fixed base 3 is connected to the crossbar assembly 1, and the support legs 4 and support rods 5 are hinged to the fixed base 3. The fixed base 3 has an outwardly extending positioning element 7, which is fixedly connected to the fixed base 3. A limiting sleeve 6 is fitted onto the positioning element 7. In the unfolded state, the limiting sleeve 6 simultaneously fits onto the positioning element 7 and the support legs 4, as well as onto the positioning element 7 and the support rods 5. In this embodiment, two support legs 4 are provided on each side, and two support rods 5 are provided on each side. The fixed base 3 is cylindrical with one end face recessed to mate with one end of the crossbar assembly 1. The support legs 4 on both sides are staggered in the circumferential direction of the fixed base 3, and the support rods 5 on both sides are staggered in the circumferential direction of the fixed base 3.

[0054] The limiting sleeve 6 can slide relative to the positioning component 7; when folding, simply pull out the limiting sleeve 6 to detach it from the support leg 4 and the support rod 5, and the support leg 4 and the support rod 5 can be folded inward, making it convenient to use; in the unfolded state, the limiting sleeve 6 simultaneously covers the positioning component 7 and the support leg 4, preventing the support leg 4 from rotating freely. Similarly, the limiting sleeve 6 also simultaneously covers the positioning component 7 and the support rod 5, preventing the support rod 5 from rotating freely, ensuring reliable unfolding.

[0055] To ensure reliable installation of the limiting sleeve 6, a blocking element 8 is provided on the positioning member 7, and the limiting sleeve 6 is located between the blocking element 8 and the fixing base 3. The blocking element 8 is used to block the limiting sleeve 6 and prevent the limiting sleeve 6 from coming off the positioning member 7.

[0056] To ensure reliable engagement of the limiting sleeve 6, an elastic element 9 in a compressed state is provided between the limiting sleeve 6 and the fixed base 3. One end of the elastic element 9 is in contact with the limiting sleeve 6, and the other end is in contact with the fixed base 3. The elastic element 9 is used to push the limiting sleeve 6, giving it a tendency to move towards the blocking element 8, thus allowing the limiting sleeve 6 to automatically engage with the support leg 4 or support rod 5, ensuring the reliability of the unfolding structure.

[0057] In this embodiment, the elastic element 9 is a compression spring; the blocking element 8 is semi-circular and located at the end of the positioning element 7 away from the fixed seat 3. The semi-circular area is large, the blocking effect is good, and it will not block the rotation of the support leg 4 or the support rod 5.

[0058] The remaining technical features are the same as in Example 2.

[0059] Example 4: This embodiment provides a folding chair, including a folding bracket as described in Embodiment 1, Embodiment 2, or Embodiment 3.

[0060] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A folding bracket, characterized in that, The assembly includes a crossbar assembly (1) and two symmetrically arranged folding assemblies (2). The folding assembly (2) includes a fixed base (3), at least two support legs (4) and at least two support rods (5). The fixed base (3) is connected to the crossbar assembly (1). The support legs (4) and support rods (5) are hinged to the fixed base (3). The fixed base (3) is provided with an outwardly extending positioning member (7). The positioning member (7) is fixedly connected to the fixed base (3). The support legs (4) and support rods (5) are each fitted with a limiting sleeve (6) or the positioning member (7) is fitted with a limiting sleeve (6). In the unfolded state, the limiting sleeve (6) is simultaneously fitted on the positioning member (7) and the support legs (4) as well as on the positioning member (7) and the support rods (5).

2. A folding bracket according to claim 1, characterized in that, Both the support leg (4) and the support rod (5) are provided with blocking elements (8), and the limiting sleeve (6) is located between the blocking element (8) and the fixed seat (3).

3. A folding bracket according to claim 2, characterized in that, An elastic element (9) in a compressed state is provided between the blocking element (8) and the limiting sleeve (6). One end of the elastic element (9) is in contact with the blocking element (8), and the other end is in contact with the limiting sleeve (6).

4. A folding bracket according to claim 1, characterized in that, The positioning member (7) is provided with a blocking member (8), and the limiting sleeve (6) is located between the blocking member (8) and the fixed seat (3); between the limiting sleeve (6) and the fixed seat (3), there is an elastic member (9) in a compressed state, one end of the elastic member (9) is in contact with the limiting sleeve (6), and the other end is in contact with the fixed seat (3).

5. A folding bracket according to claim 1, characterized in that, The positioning component (7) is a semi-circular tube with its radial opening facing the center of the crossbar assembly (1). In the unfolded state, the support leg (4) and the support rod (5) are both in contact with the inner diameter surface of the semi-circular tube; the support leg (4) and the support rod (5) are both hinged to the semi-circular tube.

6. A folding bracket according to claim 1, characterized in that, The limiting sleeve (6) has a baffle (10) on the side away from the fixed seat (3), and the baffle (10) has a through hole (11) to accommodate the support leg (4) or support rod (5).

7. A folding bracket according to claim 1, characterized in that, The limiting sleeve (6) is provided with an elastic element (9) in a stretched state. One end of the elastic element (9) is connected to the limiting sleeve (6), and the other end of the elastic element (9) is connected to the support leg (4) or the support rod (5).

8. A folding bracket according to claim 7, characterized in that, The support leg (4) and support rod (5) are both provided with guide rails (19), and the limiting sleeve (6) is provided with a sliding block (20) that cooperates with the guide rail (19). The sliding block (20) is connected to the limiting sleeve (6) and the elastic member (9) respectively. The support leg (4) and support rod (5) are rotatably connected to the positioning member (7) through the rotating shaft (21). The other end of the elastic member (9) is connected to the rotating shaft (21). The rotating shaft (21) is located between the limiting sleeve (6) and the crossbar assembly (1).

9. A folding bracket according to claim 1, characterized in that, The crossbar assembly (1) includes a left sleeve (12), a right sleeve (13), and a connector (14). The left sleeve (12) and the right sleeve (13) are arranged to the left and right of the connector (14), and the left sleeve (12) and / or the right sleeve (13) are rotatably connected to the connector (14). The left sleeve (12) is provided with a first rotating groove (15), which is arranged along the circumference of the left sleeve (12). The connector (14) is provided with a first rotating groove (15) that mates with the first rotating groove (15). The first limiting member (16) has one end located on the first rotating groove (15) and the other end connected to the connecting member (14); the right sleeve (13) is provided with a second rotating groove (17), which is arranged around the circumference of the right sleeve (13); the connecting member (14) is provided with a second limiting member (18) that cooperates with the second rotating groove (17), one end of the second limiting member (18) is located on the second rotating groove (17) and the other end connected to the connecting member (14).

10. A folding chair, characterized in that, Includes a folding bracket as described in any one of claims 1-9.

Images