Folding support

Abstract

The utility model provides a folding support, belongs to the technical field of supports, and solves the problems that an existing support is weak in lateral force resistance and poor in supporting stability. The folding support comprises a first supporting frame and a second supporting frame, the first supporting frame penetrates in the height direction to form a connecting hole, the folding support is characterized in that the first supporting frame is provided with a first protruding block, the second supporting frame is provided with a connecting shaft and a second protruding block corresponding to the first protruding block, the connecting shaft can stretch into the connecting hole, and the connecting shaft can stretch into the connecting hole. The outer side wall of the connecting shaft is sunken to form a limiting groove, the hole wall of the connecting hole protrudes to form a limiting block, the limiting block can stretch into the limiting groove and rotate in the circumferential direction and slide in the axial direction relative to the connecting shaft, and the top face of the first protruding block abuts against the bottom face of the second protruding block so that the bottom face of the limiting block can abut against the groove wall of the limiting groove. According to the folding support, the lateral force resisting capacity of the support is improved, and the supporting stability is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of brackets and relates to a folding bracket. Background Art

[0002] Brackets are widely used in various applications where temporary or adjustable height is required. For example, a folding bracket can be used to raise a beverage container to a convenient height, reducing the need to bend over. Another example is a folding bracket that allows cable reels to rotate smoothly, allowing for flexible cable length adjustment.

[0003] However, in order to ensure stability, existing brackets often adopt a fixed structure, which still occupies a large space when not in use, is difficult to stack and store, has low space utilization, and is inconvenient to carry and store.

[0004] To this end, the Chinese patent application (application number: 202311195587.1) discloses a portable cable pay-off rack including a folding chassis, the folding chassis including a main hinge and a secondary hinge that are rotatably spliced, the main hinge including a central circular shaft, an external annular groove formed in the middle of the outer wall of the central circular shaft and a first support leg arranged above the outer wall of the central circular shaft, a center hole assembly is provided in the middle of the central circular shaft, the center hole assembly includes a center hole body arranged in the middle of the lower end face of the central circular shaft, a limiting annular groove formed at the lower end of the inner wall of the center hole body, side slots uniformly distributed circumferentially in the middle of the center hole body, a central narrow hole formed in the upper middle part of the center hole body, a gear rack hole formed above the central narrow hole, and an upper narrow hole formed above the gear rack hole, the secondary hinge including a rotatable secondary rotating ring arranged on the external annular groove and a second support leg arranged below the side of the secondary rotating ring.

[0005] However, the above method has the following defects: if the bracket is subjected to a large lateral force during use, the main hinge and the secondary hinge may shake and rotate relative to each other, resulting in accidental folding and affecting the stability of the support. Utility Model Content

[0006] The purpose of the present invention is to solve the above problems in the existing technology and to propose a folding bracket. The technical problem to be solved by the present invention is: how to improve the ability of the bracket to resist lateral forces and ensure the stability of the support.

[0007] The purpose of the utility model can be achieved through the following technical solutions: a folding bracket, comprising a support frame 1 and a support frame 2, the support frame 1 penetrates along the height direction to form a connecting hole, and is characterized in that the support frame 1 is provided with a protrusion 1, the support frame 2 is provided with a connecting shaft and a protrusion 2 corresponding to the protrusion 1, the connecting shaft can be inserted into the connecting hole, the outer side wall of the connecting shaft is recessed to form a limiting groove, the hole wall of the connecting hole protrudes to form a limiting block, the limiting block can be inserted into the limiting groove and rotate circumferentially and slide axially relative to the connecting shaft, the top surface of the protrusion 1 is tightly pressed against the bottom surface of the protrusion 2 so that the bottom surface of the limiting block is tightly pressed against the groove wall of the limiting groove.

[0008] When support frame 1 and support frame 2 are in a loose state, support frame 1 and support frame 2 rotate relative to each other so that protrusion 1 is aligned with protrusion 2. Protrusion 1 applies upward pressure to protrusion 2, causing protrusion 2 to rise, and the limiting groove is also raised accordingly. At the same time, protrusion 2 applies downward pressure to protrusion 1, causing protrusion 1 to have a tendency to move downward, and the limiting block also has a tendency to move downward accordingly. As a result, by making the top surface of protrusion 1 and the bottom surface of protrusion 2 abut tightly, the bottom surface of the limiting block is driven to abut tightly against the groove wall of the limiting groove, thereby locking support frame 1 and support frame 2, that is, support frame 1 and support frame 2 are locked and fixed and will not rotate relative to each other again. The shape of the connecting shaft and the connecting hole is regular and the structure is simple. When the connecting shaft and the connecting hole are plugged in, the matching tolerance is large and does not require very precise alignment operation. When support frame 1 and support frame 2 rotate relative to each other to the position where protrusion 1 and protrusion 2 are aligned and abut tightly, the limiting block and the limiting groove are tightly matched to complete the locking of support frame 1 and support frame 2. No additional alignment is required, and the assembly requirements are relatively low. The tight fit between the protrusions 1 and 2, as well as the tight fit between the stop block and the stop slot, together achieve a locked and fixed connection between the support frame 1 and the support frame 2, effectively preventing the support frame 1 and the support frame 2 from shaking and causing accidental folding when the support frame is subjected to a large lateral force during use. The support frame has a strong ability to resist lateral forces, effectively ensuring the stability of the support. If the support frame 1 and the support frame 2 rotate relative to each other, causing the protrusions 1 and 2 to misalign, the stop block will loosen relative to the stop slot, allowing the support frame 1 and the support frame 2 to rotate relative to each other and fold together, making disassembly easy. When folded, the support frame 1 and the support frame 2 occupy a small volume, making them convenient for transportation and storage.

[0009] In the aforementioned folding bracket, the top surfaces of both protrusions 1 and 2 are planar, and there is a smooth transition between the top and side surfaces of both protrusions 1 and 2. The smooth transition between the top and side surfaces of both protrusions 1 and 2 allows protrusion 1 to smoothly slide onto the top surface of protrusion 2 when the connecting shaft rotates relative to the connecting hole, reducing friction and uneven pressure during the relative movement of protrusions 1 and 2. The top surfaces of both protrusions 1 and 2 are designed to be planar, ensuring the stability of protrusions 1 and 2 when they are tightly fitted together. This ensures uniform pressure distribution, which is beneficial for ensuring the stability of the support and effectively improves the bracket's ability to resist lateral forces.

[0010] In the above-mentioned folding bracket, the limit block is annular, the limit groove is annular, and the width of the limit block is smaller than the groove width of the limit groove. The width of the limit block is smaller than the groove width of the limit groove. When the support frame 1 and the support frame 2 are in a loose state, the limit block is loose relative to the limit groove, and the limit block can be extended into the limit groove and rotate in the circumferential direction and slide in the width direction in the limit groove, and is not easy to fall off or misplace. The limit block also guides the rotation of the connecting shaft in the connecting hole, so that the relative rotation between the support frame 1 and the support frame 2 is smoother. The cooperation between the limit groove and the limit block makes the structure simple and compact, and is conducive to ensuring stability. The limit block is annular, which helps to avoid local pressure concentration when the limit block and the limit groove are tightly fitted. At the same time, the uniform distribution of pressure is also conducive to ensuring the stability of the support, effectively improving the ability of the bracket to resist lateral forces.

[0011] In the above-mentioned folding bracket, the top surface of the limit block is an inclined guide surface 1, and the angle between the guide surface 1 and the inner side wall of the connecting hole is an obtuse angle. The end of the connecting shaft has a guide surface 2 arranged corresponding to the guide surface 1. The guide surface 1 is arranged as an inclined surface, and the end of the connecting shaft is chamfered to form the guide surface 2 arranged corresponding to the guide surface 1. When the connecting shaft extends into the connecting hole and passes through the limit block with a smaller aperture, the guide surface 1 cooperates with the guide surface 2 to guide the relative movement of the connecting shaft and the connecting hole, guiding the connecting shaft to pass through the limit block, which helps to achieve smooth and easy assembly. At the same time, the coordinated arrangement of the guide surface 1 and the guide surface 2 makes it difficult to easily pull out the end of the connecting shaft after passing through the limit block, which is conducive to ensuring the stability of the support.

[0012] In the folding bracket described above, support frame 1 includes a connecting block 1, the top surface of which protrudes upward to form a first protrusion, and support frame 2 includes a second connecting block 2, which extends vertically through the connecting block 1 to form a connecting hole, and the bottom surface of the second connecting block 2 protrudes downward to form a second protrusion and a connecting shaft. The first and second protrusions are provided on opposing surfaces of the first and second connecting blocks, respectively. When the connecting shaft is aligned with the connecting hole, the first connecting block aligns with the second connecting hole, and as the connecting shaft gradually extends into the connecting hole, the first and second connecting blocks gradually approach each other, facilitating alignment and assembly of the brackets.

[0013] The folding bracket comprises at least two protrusions 1 and 2, respectively, and a clearance space 1 is formed between adjacent protrusions 1, and a clearance space 2 is formed between adjacent protrusions 2. The connecting shaft extends into the connecting hole, aligning the protrusion 1 with the clearance space 2, and the protrusion 2 with the clearance space 1. When the end of the connecting shaft passes through the stop block, the stop block extends into the limit groove. At this time, the positions of the protrusions 1 and 2 are staggered, and the stop block is loose relative to the limit groove, causing the connecting shaft to rotate relative to the connecting hole, driving the protrusion 1 to align with the protrusion 2. When the protrusion 1 aligns with and abuts against the protrusion 2, the stop block and the limit groove are tightly engaged.

[0014] In the aforementioned folding stand, the first support frame further includes first support legs disposed on either side of the first connecting block, and the second support frame further includes second support legs disposed on either side of the second connecting block. The first support legs being located on either side of the first support frame and the second support legs being located on either side of the second support frame effectively distribute and carry the load, preventing tilting or imbalance of the first and second support frames, and thereby ensuring support stability.

[0015] Compared with the existing technology, this folding bracket has the following advantages:

[0016] 1. In this folding bracket, the connecting shaft and the connecting hole have regular shapes and simple structures. When the connecting shaft and the connecting hole are plugged in, the matching tolerance is large and very precise alignment operation is not required. When the support frame 1 and the support frame 2 are relatively rotated to the position where the protrusion 1 and the protrusion 2 are aligned and pressed together, the limit block and the limit groove are pressed together to complete the locking of the bracket 1 and the bracket 2. No additional alignment is required and the assembly requirements are relatively low.

[0017] 2. In this folding bracket, the tight fit between the protrusion 1 and the protrusion 2, as well as the tight fit between the limit block and the limit groove, jointly realize the locking and fixation of the support frame 1 and the support frame 2, effectively preventing the support frame 1 and the support frame 2 from shaking and causing accidental folding when the bracket is subjected to a large lateral force during use. The bracket has a strong ability to resist lateral forces, effectively ensuring the stability of the support.

[0018] 3. In this folding bracket, if the support frame 1 and the support frame 2 rotate relative to each other so that the protrusion 1 and the protrusion 2 are misaligned, at this time, the limit block is loose relative to the limit groove, and the support frame 1 and the support frame 2 can be relatively rotated and folded together, which is convenient for disassembly. When the support frame 1 and the support frame 2 are folded, they occupy a small volume, which is convenient for transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the folding bracket in the working state.

[0020] Figure 2 It is a schematic diagram of the locked state of the folding bracket.

[0021] Figure 3 yes Figure 2 Cross-sectional view along AA direction.

[0022] Figure 4 It is a schematic diagram of the loose state of the folding bracket.

[0023] Figure 5 yes Figure 4 Cross-sectional view along direction BB.

[0024] Figure 6 It is a bottom view of the folding stand in the folded state.

[0025] Figure 7 It is a schematic diagram of support frame 1 in this folding bracket.

[0026] Figure 8 It is a partial cross-sectional view of the support frame 1 in the folding bracket.

[0027] Figure 9 It is a schematic diagram of the support frame 2 in this folding bracket.

[0028] In the figure, 1. Support frame 1; 1a. Connecting block 1; 1b. Support foot 1; 2. Support frame 2; 2a. Connecting block 2; 2b. Support foot 2; 3. Connecting hole; 4. Protrusion 1; 5. Limiting block; 5a. Guide surface 1; 6. Protrusion 2; 7. Connecting shaft; 7a. Guide surface 2; 8. Limiting groove; 9. Clearance space 1; 10. Clearance space 2. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0031] Example 1:

[0032] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, this folding stand includes support frame 1 and support frame 2. Support frame 1 includes connecting block 1a and supporting legs 1b located on either side of connecting block 1a. Support frame 2 includes connecting block 2a and supporting legs 2b located on either side of connecting block 2a. Support legs 1b are located on either side of support frame 1, and supporting legs 2b are located on either side of support frame 2. This effectively distributes and carries the load, preventing tilting or imbalance of support frames 1 and 2, and ensuring support stability.

[0033] Specifically, the connecting block 1a and the supporting leg 1b are integrally formed, and the connecting block 2a and the supporting leg 2b are integrally formed.

[0034] The bottom of connecting block 2a protrudes downward to form protrusion 2 6 and a connecting shaft 7 that can extend into connecting hole 3. The outer wall of connecting shaft 7 is recessed to form an annular stopper groove 8. Connecting block 1a extends vertically through connecting hole 3. The top of connecting block 1a protrudes upward to form protrusion 1 4, and the wall of connecting hole 3 protrudes to form an annular stopper 5.

[0035] The connecting block 1a and the connecting block 2 2a are respectively provided with a protrusion 1 4 and a protrusion 2 6 on the opposite surfaces. When the connecting shaft 7 is aligned with the connecting hole 3, the connecting block 1a is aligned with the connecting hole 2 2a. When the connecting shaft 7 gradually extends into the connecting hole 3, the connecting block 1a and the connecting block 2 2a gradually approach each other, and the alignment and assembly operation of the bracket is convenient.

[0036] The top surface of the limit block 5 is an inclined guide surface 5a, and the angle between the guide surface 5a and the inner wall of the connecting hole 3 is an obtuse angle. The end of the connecting shaft 7 is chamfered to form a guide surface 7b corresponding to the guide surface 5a.

[0037] The stop block 5 can be inserted into and slide within the stop slot 8, making it less likely to fall out or become misaligned. It also guides the rotation of the connecting shaft 7 within the connecting hole 3, making the relative rotation between the support frame 1 and the support frame 2 more stable. The structure is simple and compact, and helps ensure stability. The top surface of the guide surface 1 5a is inclined, and the end of the connecting shaft 7 is chamfered to form a guide surface 2 7b corresponding to the guide surface 1 5a. When the connecting shaft 7 is inserted into the connecting hole 3 and passes through the stop block 5 with a smaller aperture, the guide surface 1 5a cooperates with the guide surface 2 7a to guide the relative movement of the connecting shaft 7 and the connecting hole 3, guiding the connecting shaft 7 through the stop block 5 and facilitating smooth and easy assembly. Furthermore, the coordinated arrangement of the guide surface 1 5a and the guide surface 2 7a makes it difficult to easily remove the end of the connecting shaft 7 after passing through the stop block 5, which helps ensure support stability. The limiting block 5 is annular, which helps to avoid local pressure concentration when the limiting block 5 is tightly fitted with the limiting groove 8. At the same time, the uniform distribution of pressure is also conducive to ensuring the stability of the support.

[0038] There are at least two protrusions 1 4 and 2 protrusions 6, respectively. A clearance space 1 9 is formed between adjacent protrusions 1 4, and a clearance space 2 10 is formed between adjacent protrusions 2 6. The width of the limit block 5 is smaller than the width of the limit slot 8. When the limit block 5 is loose relative to the limit slot 8, the protrusion 1 4 is placed in the clearance space 2 10, and the protrusion 2 6 can be placed in the clearance space 1 9. The width of the limit block 5 is smaller than the width of the limit slot 8. When the support frame 1 1 and the support frame 2 2 are in a loose state, the limit block 5 is loose relative to the limit slot 8. The limit block 5 can slide in the limit slot 8 along the circumferential direction of the connection hole 3, and can also slide in the limit slot 8 along the axial direction of the connection hole 3, that is, along the width direction of the limit slot 8.

[0039] The side surfaces of both bump 1 4 and bump 2 6 are curved, and the top surfaces of both bump 1 4 and bump 2 6 are flat, with smooth transitions between the top and side surfaces of both bump 1 4 and bump 2 6. The side surfaces of both bump 1 4 and bump 2 6 are designed as curved, and the top and side surfaces of both bump 1 4 and bump 2 6 are smoothly transitioned. This allows bump 1 4 to smoothly slide along the curved surface to the top surface of bump 2 6 when the connecting shaft 7 rotates relative to the connecting hole 3, reducing friction and uneven pressure during the relative movement of bump 1 4 and bump 2 6. The top surfaces of both bump 1 4 and bump 2 6 are flat, ensuring the stability of bump 1 4 and bump 2 6 when they are tightly fitted. This ensures uniform pressure distribution due to flat contact, which helps ensure the stability of the support and effectively improves the bracket's ability to resist lateral forces.

[0040] When assembling support frame 1 and support frame 2, first, align the connecting shaft 7 and extend it into the connecting hole 3, align the protrusion 1 4 with the clearance space 2 10, and align the protrusion 2 6 with the clearance space 1 9. When the end of the connecting shaft 7 passes through the limiting block 5, the limiting block 5 extends into the limiting groove 8. At this time, the positions of the protrusion 1 4 and the protrusion 2 6 are staggered, and the limiting block 5 is loose relative to the limiting groove 8. Then, rotate the connecting shaft 7 relative to the connecting hole 3, driving the protrusion 2 6 to align with the protrusion 1 4. The protrusion 1 4 and the protrusion 2 6 slide relative to each other along the curvature of the side, so that the top surface of the protrusion 1 4 contacts the bottom surface of the protrusion 2 6. At this time, the protrusion 1 4 applies upward pressure to the protrusion 2 6, so that the connecting block 2a is raised. At the same time, the protrusion The second 6 applies downward pressure to the protrusion 4, so that the connecting block 1a tends to move downward. As a result, the protrusion 4 and the protrusion 2 6 tend to move relative to each other on the contact surface. By making the top surface of the protrusion 4 press against the bottom surface of the protrusion 2 6, the limit block 5 and the limit groove 8 tend to move relative to each other on the contact surface. Specifically, when the protrusion 2 6 is raised, the limit groove 8 is also raised. When the protrusion 1 4 tends to move downward, the limit block 5 also tends to move downward. That is, the bottom surface of the limit block 5 applies downward pressure to the groove wall of the limit groove 8, and the groove wall of the limit groove 8 applies upward pressure to the bottom surface of the limit block 5, so that the bottom surface of the limit block 5 is pressed against the groove wall of the limit groove 8. The protrusion 1 4 and the protrusion 2 6 have a tendency to move relative to each other on the contact surface, and the limit block 5 and the limit groove 8 have a tendency to move relative to each other on the contact surface. Therefore, while the protrusion 1 4 and the protrusion 2 6 are tightly fitted, the bottom surface of the limit block 5 is tightly fitted with the groove wall of the limit groove 8, so that the support frame 1 1 and the support frame 2 2 are locked and fixed and will no longer rotate relative to each other.

[0041] When the locked support frame 1 and support frame 2 are folded, support frame 1 and support frame 2 2 rotate relative to each other so that protrusion 1 4 and protrusion 2 6 are misaligned. At this time, the top surface of protrusion 1 4 and the bottom surface of protrusion 2 6 are no longer tightly pressed, and the bottom surface of limit block 5 and the groove wall of limit groove 8 are no longer tightly pressed, that is, protrusion 1 4 is loose relative to protrusion 2 6, limit block 5 is loose relative to limit groove 8, and support frame 1 is loose relative to support frame 2 2. Support frame 1 can continue to rotate relative to support frame 2 2 until support frame 1 and support frame 2 2 are folded.

[0042] The connecting shaft 7 and the connecting hole 3 are of regular shape and simple structure. When the connecting shaft 7 and the connecting hole 3 are plugged in, the matching tolerance is large, and very precise alignment operation is not required. When the support frame 1 and the support frame 2 are relatively rotated to the position where the protrusion 1 4 and the protrusion 2 6 are aligned and pressed together, the limit block 5 and the limit groove 8 are pressed together to complete the locking of the support frame 1 and the support frame 2. No additional alignment is required, and the assembly requirements are relatively low. The tight fit of the protrusion 1 4 and the protrusion 2 6, as well as the tight fit of the limit block 5 and the limit groove 8, together realize the locking and fixation of the support frame 1 and the support frame 2, effectively preventing the support frame 1 and the support frame 2 from shaking and causing accidental folding when the support frame is subjected to large lateral forces during use. The support frame has a strong ability to resist lateral forces, effectively ensuring the stability of the support. If the support frame 1 and the support frame 2 rotate relative to each other so that the protrusion 1 4 and the protrusion 2 6 are misaligned, at this time, the limit block 5 is loose relative to the limit groove 8, and the support frame 1 and the support frame 2 can be relatively rotated and folded together, which is convenient for disassembly. When the support frame 1 and the support frame 2 are folded, they occupy a small volume, which is convenient for transportation and storage.

[0043] Example 2:

[0044] The technical solution in this embodiment is basically the same as the technical solution in Example 1, except that, in this embodiment, the hole wall of the connecting hole 3 is recessed to form an annular limiting groove, and the outer side wall of the connecting shaft 7 protrudes to form an annular limiting block.

[0045] Although this document frequently uses terms such as support frame 1, connecting block 1a, supporting foot 1b, supporting frame 2, connecting block 2a, supporting foot 2b, connecting hole 3, protrusion 14, limiting block 5, guide surface 15a, protrusion 26, connecting shaft 7, guide surface 27a, limiting groove 8, clearance space 19, and clearance space 20, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A folding bracket, comprising a support frame 1 (1) and a support frame 2 (2), wherein the support frame 1 (1) is penetrated along the height direction to form a connecting hole (3), characterized in that: The support frame 1 (1) is provided with a protrusion 1 (4), and the support frame 2 (2) is provided with a connecting shaft (7) and a protrusion 2 (6) corresponding to the protrusion 1 (4). The connecting shaft (7) can be inserted into the connecting hole (3). The outer wall of the connecting shaft (7) is recessed to form a limiting groove (8). The hole wall of the connecting hole (3) is protruding to form a limiting block (5). The limiting block (5) can be inserted into the limiting groove (8) and rotate circumferentially and slide axially relative to the connecting shaft (7). The top surface of the protrusion 1 (4) is pressed against the bottom surface of the protrusion 2 (6) so that the bottom surface of the limiting block (5) is pressed against the groove wall of the limiting groove (8).

2. A folding bracket according to claim 1, characterized in that: The top surfaces of the first convex block (4) and the second convex block (6) are both planes, and there is a smooth transition between the top surfaces and side surfaces of the first convex block (4) and the second convex block (6).

3. A folding bracket according to claim 1 or 2, characterized in that: The limiting block (5) is annular, the limiting groove (8) is annular, and the width of the limiting block (5) is smaller than the groove width of the limiting groove (8).

4. A folding bracket according to claim 3, characterized in that: The top surface of the limit block (5) is an inclined guide surface 1 (5a), and the included angle between the guide surface 1 (5a) and the inner side wall of the connecting hole (3) is an obtuse angle. The end of the connecting shaft (7) has a guide surface 2 (7a) corresponding to the guide surface 1 (5a).

5. The folding bracket according to claim 4, characterized in that: The support frame 1 (1) includes a connecting block 1 (1a), the top surface of which protrudes upward to form a protrusion 1 (4), and the support frame 2 (2) includes a connecting block 2 (2a), the connecting block 1 (1a) penetrates along the height direction to form a connecting hole (3), and the bottom surface of which protrudes downward to form a protrusion 2 (6) and a connecting shaft (7).

6. The folding bracket according to claim 5, characterized in that: There are at least two protrusions 1 (4) and 2 protrusions 6, respectively. A first clearance space (9) is formed between adjacent protrusions 1 (4), and a second clearance space (10) is formed between adjacent protrusions 2 (6).

7. The folding bracket according to claim 6, characterized in that: The support frame 1 (1) further comprises support legs 1 (1b) respectively arranged on both sides of the connecting block 1 (1a), and the support frame 2 (2) further comprises support legs 2 (2b) respectively arranged on both sides of the connecting block 2 (2a).

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