Linkage folding structure and folding stand

Abstract

The utility model provides a connecting rod folding structure and folding frame, including lock piece, is equipped with limit bulge, unlocking bulge and clamping hook, connecting piece no.

Description

Technical Field

[0001] This utility model relates to the field of folding rod technology, and in particular to a connecting rod folding structure and a folding frame. Background Technology

[0002] Linkage folding structures, as a common mechanical connection method, are widely used in various foldable devices, such as folding chairs, folding beds, and engineering robotic arms. Current technologies generally employ a sheet metal forming assembly structure, which mainly consists of inner and outer hinge plates, compression springs, sliders, torsion springs, and wrenches. The working principle of this structure is as follows: during rotation, the slider slides along the inner circle of the inner hinge plate. A slider groove is punched at a preset angle on the outer circle of the inner hinge plate. When the slider is inserted into the groove under the action of the compression spring, the inner and outer hinge plates are locked to form the required angle.

[0003] While existing linkage folding structures can achieve basic folding functionality, they have significant drawbacks in practical applications: (1) Because the hinge structure requires multiple moving parts and mating holes, when used outdoors or in harsh working conditions, foreign objects such as sand and gravel can easily enter the hinge holes, causing wear of parts and jamming of the mechanism. (2) The existing linkage folding structure contains a large number of parts and has a large overall volume, which not only increases the manufacturing cost, but also makes the installation and debugging process complicated; (3) In terms of ease of operation, the existing linkage folding structure requires manual operation of multiple parts to complete the unlocking action, which cannot achieve quick one-click unlocking, affecting user experience and efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a linkage folding structure and folding frame to alleviate the technical problems of existing linkage folding structures using hinge structures, such as easy foreign object wear and jamming, large number of parts and complex structure, and cumbersome locking and unlocking process.

[0005] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: In a first aspect, this utility model provides a link folding structure, comprising: The locking plate has its front and rear sides extending along its length, respectively. The rear side has a limiting protrusion, the front side has an unlocking protrusion, and one end in its length direction has a hook extending forward. A connector is provided with a mounting groove on one side. The mounting groove is provided with a locking plate limiting hole and a locking and unlocking hole on the adjacent two side walls. The opening size of the locking plate limiting hole allows the end of the locking plate with the hook to pass through. Connector 2 has a mounting groove 2 on one side. The mounting groove 2 has a locking plate limiting hole 2 and a locking plate control hole 1 on its adjacent side walls. The locking plate passes through the locking plate limiting hole 2, and the end of the locking plate away from the hook is rotatably mounted on the connector 2. The limiting protrusion is located inside the mounting groove 2, and the unlocking protrusion passes through the locking plate control hole 1. A spring is installed inside the second mounting groove, with one axial end sleeved on the outside of the limiting protrusion and the other axial end abutting against the inner wall of the second mounting groove. The first connector is rotatably connected to the second connector; In the locked state, the locking plate limiting hole one and the locking plate limiting hole two are connected and sleeved on the outside of the locking plate. Under the action of the spring, the hook is inserted into the locking and unlocking hole to lock the connecting piece one and the connecting piece two. In the unlocked state, the unlocking protrusion is pressed from front to back to drive the limiting protrusion to compress the spring, thereby causing the hook to disengage from the locking and unlocking hole of the connecting piece one. The connecting piece one is rotated relative to the connecting piece two, and the connecting piece one disengages from the locking plate.

[0006] In an optional embodiment, the link folding structure further includes a connecting member three; The connector three is provided with a mounting groove three, and the adjacent two side walls of the mounting groove three are respectively provided with a locking plate limiting hole three and a locking plate control hole two that penetrate each side wall; The connecting piece three is fixed inside the mounting groove two, and the locking plate limiting hole three is interconnected with the locking plate limiting hole two, and the locking plate control hole one is interconnected with the locking plate control hole two; The spring is installed inside the mounting groove three, and the locking plate also passes through the locking plate limiting hole three. The end of the locking plate away from the hook is rotatably installed on the connector three. In the locked state, the unlocking protrusion passes through the locking unlocking hole two and the locking unlocking hole one.

[0007] In an optional embodiment, connector one, connector two, and connector three are all U-shaped components, mounting groove one and mounting groove two are respectively located on opposite sides of connector one and connector two, and the opening of mounting groove three and mounting groove two face the same direction.

[0008] In an optional embodiment, a partition is provided inside the mounting groove three, and the partition and part of the inner wall of the mounting groove three surround to form a limiting cavity, and the spring is installed inside the limiting cavity; the partition is provided with a locking plate limiting hole four, and the locking plate passes through the locking plate limiting hole four, wherein: the locking plate limiting hole three and the locking plate limiting hole four are both elongated holes extending in the front-back direction along the locking plate in the locked state.

[0009] In an optional embodiment, the partition plate has two opposing limiting protrusions on the side opposite to the limiting cavity, and the end of the locking piece away from the hook is inserted between the two limiting protrusions and is rotatably mounted on the two limiting protrusions by a rotating shaft.

[0010] In an optional embodiment, the first connector and the second connector are rotatably connected by bolts and nuts. Hollow cylindrical connecting posts are provided on one side of the first connector and one side of the second connector. The two connecting posts are coaxially arranged in the vertical direction. The shank of the bolt passes through the central hole of the two connecting posts and is then locked by the nut.

[0011] In an optional embodiment, the end face of the locking plate with the hook includes an interconnected arc surface and a slope, the slope is connected to the front side of the arc surface, and the angle between the slope and the front surface of the locking plate is an obtuse angle.

[0012] In an optional embodiment, a rounded chamfered surface is provided between the inclined surface and the front surface of the locking piece.

[0013] In an optional embodiment, each of the two opposite side walls of connector one and connector two is provided with a connecting hole for connecting to a connecting rod.

[0014] Secondly, this utility model provides a folding frame, including a folding rod, wherein the folding rod includes a first connecting rod, a second connecting rod, and a connecting rod folding structure provided in any of the optional embodiments of the first aspect; wherein one end of the first connecting rod is inserted into the first mounting groove and fixedly connected to the first connecting rod, and one end of the second connecting rod is inserted into the second mounting groove and fixedly connected to the second connecting rod.

[0015] The embodiments of this utility model can achieve at least the following beneficial effects: In use, insert one end of connecting rod one into the mounting groove one and fix it to connecting rod one. Insert one end of connecting rod two into the mounting groove two and fix it to connecting rod two. Rotate connecting rod one and connecting rod two relative to each other, so that the outer surface of the limiting hole one of connecting rod one and the outer surface of the locking plate limiting hole two of connecting rod two come closer together, pressing the locking plate and fitting it onto the outside of the locking plate. During the pressing process, the compression spring falls back under the elastic force of the spring, and finally the hook automatically inserts into the locking and unlocking hole of connecting rod one to lock connecting rod one and connecting rod two. When unlocking is required, press the unlocking protrusion from front to back to drive the limiting protrusion to compress the spring, so that the hook disengages from the locking and unlocking hole of connecting rod one. Further rotate connecting rod one relative to connecting rod two, and connecting rod one can disengage from the locking plate, realizing the "one-click unlocking" function.

[0016] The linkage folding structure provided in this embodiment has a simple overall structure, a simple and reliable action mechanism, is less affected by wind and sand, has fewer parts, low manufacturing cost, is easy to maintain, and is easy to operate. It can realize automatic locking and one-button unlocking functions. More importantly, the elastic energy storage structure relied on for locking and unlocking is a straight spring, without the participation of torsion springs. The unlocking energy of the spring is 100% used for reset, making the locking state more stable and reliable, and unlocking more convenient and effortless, greatly improving the user experience.

[0017] In addition, this utility model embodiment also provides several optional implementation methods. The specific implementation method section of this specification will provide a detailed description and explanation of the specific structure and functional effects of these optional implementation methods. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an assembly diagram of the connecting rod folding structure provided in an embodiment of the present utility model; Figure 2 An exploded view of the connecting rod folding structure provided in this embodiment of the utility model; Figure 3 An exploded view of the assembly structure of the connecting rod folding structure and connecting rod one and connecting rod two provided in the embodiment of this utility model; Figure 4 A schematic diagram of the unfolded folding frame provided in an embodiment of this utility model; Figure 5 This is a folding diagram of the foldable frame portion of the folding frame provided in an embodiment of the present utility model.

[0020] Icons: 1-Connector 1; 11-Mounting slot 1; 12-Lock plate limiting hole 1; 13-Lock / unlock hole; 2-Connector II; 21-Mounting Slot II; 22-Lock Plate Limiting Hole II; 23-Lock Plate Control Hole I; 3-Connector Three; 31-Mounting Slot Three; 32-Lock Plate Limiting Hole Three; 33-Lock Plate Control Hole Two; 34-Partition Plate; 341-Limiting Cavity; 35-Lock Plate Limiting Hole Four; 36-Limiting Protrusion; 37-Rotating Shaft; 4-Locking plate; 41-Limiting protrusion; 42-Unlocking protrusion; 43-Hook; 431-Arc surface; 432-Bevel surface; 433-Chamfered surface; 5-Spring; 6-Connecting post; 71-Connecting member one; 72-Connecting member two. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the terms "horizontal" and "vertical" do not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] First aspect This embodiment provides a link folding structure, see reference. Figures 1 to 3 The linkage folding structure includes at least a locking plate 4, a connecting piece 1, a connecting piece 2, and a spring 5.

[0029] Specifically: The two sides extending along the length of the locking plate 4 are designated as the front and rear sides of the locking plate 4, respectively. The rear side of the locking plate 4 has a limiting protrusion 41, and the front side has an unlocking protrusion 42. One end of the locking plate 4 along its length has a hook 43 extending forward. One side of the connector 1 has a mounting groove 11. The adjacent side walls of the mounting groove 11 have locking plate limiting holes 12 and locking / unlocking holes 13, respectively. The opening size of the locking plate limiting hole 12 allows the end of the locking plate 4 with the hook 43 to pass through. One side of the connector 2 has a mounting groove 21. The adjacent side walls of the mounting groove 21 have locking plate limiting holes 22 and locking plate control holes 23, respectively. The locking plate 4 passes through the locking plate limiting hole 22, and the end of the locking plate 4 furthest from the hook 43 is rotatably mounted on the connector 2. The limiting protrusion 41 is located inside the mounting groove 21, and the unlocking protrusion 42 passes through the locking plate control hole 23. Spring 5 is installed inside mounting groove 21. One axial end of spring 5 is sleeved on the outside of the limiting protrusion 41, and the other axial end of spring 5 abuts against the inner wall of mounting groove 21.

[0030] Connector 1 and connector 2 are rotatably connected.

[0031] In the locked state, the locking plate limiting hole 12 and the locking plate limiting hole 22 are connected and sleeved on the outside of the locking plate 4. Under the action of the spring 5, the hook 43 is inserted into the locking and unlocking hole 13 to lock the connecting piece 1 and the connecting piece 2. Figure 1 The image shows the locked state. In the unlocked state, pressing the unlocking protrusion 42 from front to back drives the limiting protrusion 41 to compress the spring 5, thereby causing the hook 43 to disengage from the locking and unlocking hole 13 of the connector 1. Further rotating the connector 1 relative to the connector 2 allows the connector 1 to disengage from the locking piece 4.

[0032] When using, such as Figure 3 As shown, one end of connecting rod 71 is inserted into the mounting groove 11 and fixedly connected to connecting rod 1. One end of connecting rod 72 is inserted into the mounting groove 21 and fixedly connected to connecting rod 2. Connecting rod 71 and connecting rod 72 are rotated relative to each other, so that the outer surface of the limiting hole 12 of connecting rod 71 and the outer surface of the locking plate limiting hole 22 of connecting rod 72 come close to each other, pressing the locking plate 4 and fitting it on the outside of the locking plate 4. During the pressing process, the compression spring 5 falls back under the elastic force of the spring 5. Finally, the hook 43 is automatically inserted into the locking and unlocking hole 13 of connecting rod 71 to lock connecting rod 1 and connecting rod 2. When unlocking is required, press the unlocking protrusion 42 from front to back to drive the limiting protrusion 41 to compress the spring 5, thereby causing the hook 43 to disengage from the locking and unlocking hole 13 of the connector 1. Further rotate the connector 1 relative to the connector 2, and the connector 1 can disengage from the locking piece 4 to realize the "one-click unlocking" function.

[0033] The linkage folding structure provided in this embodiment has a simple overall structure, a simple and reliable action mechanism, is less affected by wind and sand, has fewer parts, low manufacturing cost, is easy to maintain, and is easy to operate. It can realize automatic locking and one-button unlocking functions. More importantly, the elastic energy storage structure relied on for locking and unlocking is a straight spring, without the participation of torsion springs. The unlocking energy of spring 5 is 100% used for reset, making the locking state more stable and reliable, and unlocking more convenient and effortless, greatly improving the user experience.

[0034] In an optional embodiment of this example, the connecting rod folding structure further includes a connecting member 3; the connecting member 3 is provided with a mounting groove 31, and the adjacent side walls of the mounting groove 31 are respectively provided with a locking plate limiting hole 32 and a locking plate control hole 23 that penetrate each side wall. The connecting member 3 is fixed inside the mounting groove 21, and the locking plate limiting hole 32 and the locking plate limiting hole 22 are interconnected, and the locking plate control hole 13 and the locking plate control hole 23 are interconnected; the spring 5 is installed inside the mounting groove 31, and the locking plate 4 also passes through the locking plate limiting hole 32, with the end of the locking plate 4 away from the hook 43 rotatably installed on the connecting member 3; in the locked state, the unlocking protrusion 42 passes through the locking unlocking hole 131 via the locking unlocking hole 132. In this optional embodiment, by setting the connecting member 3, the spring 5 and the locking plate 4 can be pre-assembled with the connecting member 3 as a component, and then assembled with the connecting member 2, which is beneficial for step-by-step assembly and later maintenance.

[0035] In an optional embodiment of this example, connector 1, connector 2, and connector 3 are all U-shaped components. Mounting groove 11 and mounting groove 21 are respectively located on opposite sides of connector 1 and connector 2, with mounting groove 31 and mounting groove 21 having the same opening orientation. This optional embodiment ensures the consistency and symmetry of the entire linkage folding structure in appearance and function, provides better mechanical support and bending resistance, makes each connector more stable under external forces, and the U-shaped design facilitates disassembly and reassembly, reducing assembly difficulty, promoting rapid assembly, and simplifying later maintenance.

[0036] In an optional embodiment of this example, a partition 34 is provided inside the mounting groove 31. The partition 34 and part of the inner wall of the mounting groove 31 form a limiting cavity 341, and the spring 5 is installed inside the limiting cavity 341. The partition 34 is provided with a locking plate limiting hole 45, through which the locking plate 4 passes. Both the locking plate limiting hole 32 and the locking plate limiting hole 45 are elongated holes extending in the front-back direction of the locking plate 4 in the locked state. In this optional embodiment, the partition 34 confines the spring 5 inside the limiting cavity 341, and the locking plate 4 is guided by the locking plate limiting hole 45, achieving precise positioning of the spring 5, improving the stability of the spring 5 when compressed and rebounding, and enhancing the reliability of locking and one-button unlocking of the locking plate 4.

[0037] In an optional embodiment of this invention, the partition 34 has two opposing limiting protrusions 36 on the side opposite to the limiting cavity 341. The end of the locking piece 4 away from the hook 43 is inserted between the two limiting protrusions 36 and rotatably mounted on the two limiting protrusions 36 via a rotating shaft 37. In this optional embodiment, the two limiting protrusions 36 provide a stable rotation fulcrum for the locking piece 4, reducing the complexity of assembly while ensuring the smoothness and reliability of the locking piece 4 during movement. The rotating shaft 37 can be, but is not limited to, a pin, bolt and nut assembly, or rivet, or other rod-like structures or components.

[0038] In an optional embodiment of this invention, connector 1 and connector 2 are rotatably connected by bolts and nuts. Hollow cylindrical connecting posts 6 are provided on one side of connector 1 and one side of connector 2, respectively. The two connecting posts 6 are coaxially arranged in the vertical direction, and the bolt shank passes through the central hole of the two connecting posts 6 and is then locked by the nut. In this optional embodiment, the connecting posts 6 are hollow cylinders, and the two connecting posts 6 are coaxially arranged in the vertical direction. This design ensures smoother and more precise rotation between connector 1 and connector 2; the bolt and nut connection also provides sufficient preload, reducing gaps and wobbling during rotation and improving motion accuracy.

[0039] In an optional embodiment of this example, the end face of the locking plate 4 with the hook 43 includes an interconnected arc surface 431 and a bevel 432. The bevel 432 is connected to the front side of the arc surface 431, and the angle between the bevel 432 and the front surface of the locking plate 4 is an obtuse angle. Optionally, an arc chamfered surface 433 is provided between the bevel 432 and the front surface of the locking plate 4. These designs in this optional embodiment allow the connecting rod 71 and the connecting rod 72 to move so that the outer surface of the connecting rod 71 with the limiting hole 12 and the outer surface of the connecting rod 72 with the locking plate limiting hole 22 come close to each other. This allows the connecting rod 71 to more smoothly press the locking plate 4 and fit over the outside of the locking plate 4, achieving fast and smooth locking.

[0040] In an optional embodiment of this example, each of the two opposite side walls of connector 1 and connector 2 is provided with a connection hole for connecting with the connecting rod. Each connector can be fitted onto the connecting rod and then fixedly connected to the connecting rod by screws or bolt and nut assemblies.

[0041] Second aspect Reference Figure 4 and Figure 5 This utility model provides a folding frame, including a folding rod, which includes a connecting rod 71, a connecting rod 72, and a connecting rod folding structure provided in any optional embodiment of the first aspect; wherein, one end of the connecting rod 71 is inserted into the mounting groove 11 and fixedly connected to the connecting rod 1, and one end of the connecting rod 72 is inserted into the mounting groove 21 and fixedly connected to the connecting rod 2.

[0042] A folding frame can be equipped with one or more sets of such folding rods, or as... Figure 4 and Figure 5 As shown, a folding frame is designed with a detachable middle frame including two or more sets of folding rods. When storing, the middle frame is removed and folded symmetrically, or other frame structures including folding rods.

[0043] The specific structure and achievable effects of the linkage folding structure in the folding frame provided in this embodiment can be obtained by referring to the optional or preferred embodiments in the first aspect.

[0044] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. The above embodiments in this specification are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A linkage folding structure, characterized in that, include: The locking plate has its front and rear sides extending along its length, respectively. The rear side has a limiting protrusion, the front side has an unlocking protrusion, and one end in its length direction has a hook extending forward. A connector is provided with a mounting groove on one side. The mounting groove is provided with a locking plate limiting hole and a locking and unlocking hole on the adjacent two side walls. The opening size of the locking plate limiting hole allows the end of the locking plate with the hook to pass through. Connector 2 has a mounting groove 2 on one side. The mounting groove 2 has a locking plate limiting hole 2 and a locking plate control hole 1 on its adjacent side walls. The locking plate passes through the locking plate limiting hole 2, and the end of the locking plate away from the hook is rotatably mounted on the connector 2. The limiting protrusion is located inside the mounting groove 2, and the unlocking protrusion passes through the locking plate control hole 1. A spring is installed inside the second mounting groove, with one axial end sleeved on the outside of the limiting protrusion and the other axial end abutting against the inner wall of the second mounting groove. The first connector is rotatably connected to the second connector; In the locked state, the locking plate limiting hole one and the locking plate limiting hole two are connected and sleeved on the outside of the locking plate. Under the action of the spring, the hook is inserted into the locking and unlocking hole to lock the connecting piece one and the connecting piece two. In the unlocked state, press the unlocking protrusion from front to back to drive the limiting protrusion to compress the spring, thereby causing the hook to disengage from the locking and unlocking hole of the first connector. Rotate the first connector relative to the second connector, and the first connector disengages from the locking piece.

2. The linkage folding structure according to claim 1, characterized in that, The folding structure of the linkage also includes connector three; The connector three is provided with a mounting groove three, and the adjacent two side walls of the mounting groove three are respectively provided with a locking plate limiting hole three and a locking plate control hole two that penetrate each side wall; The connecting piece three is fixed inside the mounting groove two, and the locking plate limiting hole three is interconnected with the locking plate limiting hole two, and the locking plate control hole one is interconnected with the locking plate control hole two; The spring is installed inside the mounting groove three, and the locking plate also passes through the locking plate limiting hole three. The end of the locking plate away from the hook is rotatably installed on the connector three. In the locked state, the unlocking protrusion passes through the locking unlocking hole two and the locking unlocking hole one.

3. The linkage folding structure according to claim 2, characterized in that, The first connector, the second connector, and the third connector are all U-shaped components. The first mounting groove and the second mounting groove are respectively located on opposite sides of the first connector and the second connector. The third mounting groove and the second mounting groove have the same opening orientation.

4. The linkage folding structure according to claim 3, characterized in that, A partition is provided inside the mounting groove three. The partition and part of the inner wall of the mounting groove three form a limiting cavity. The spring is installed inside the limiting cavity. A locking plate limiting hole four is provided on the partition. The locking plate passes through the locking plate limiting hole four. Both the locking plate limiting hole three and the locking plate limiting hole four are elongated holes extending in the front-back direction of the locking plate in the locked state.

5. The linkage folding structure according to claim 4, characterized in that, The partition plate has two opposing limiting protrusions on the side away from the limiting cavity. The end of the locking piece away from the hook is inserted between the two limiting protrusions and is rotatably mounted on the two limiting protrusions via a rotating shaft.

6. The linkage folding structure according to claim 1, characterized in that, The first connector and the second connector are rotatably connected by bolts and nuts. Hollow cylindrical connecting posts are provided on one side of the first connector and one side of the second connector. The two connecting posts are coaxially arranged in the vertical direction. The shank of the bolt passes through the central hole of the two connecting posts and is then locked by the nut.

7. The linkage folding structure according to claim 1, characterized in that, The end face of the locking plate with the hook includes an arc surface and an inclined surface connected to each other. The inclined surface is connected to the front side of the arc surface, and the angle between the inclined surface and the front surface of the locking plate is an obtuse angle.

8. The linkage folding structure according to claim 7, characterized in that, A chamfered surface is provided between the inclined surface and the front surface of the locking plate.

9. The linkage folding structure according to claim 1, characterized in that, The two opposite side walls of connector one and connector two are respectively provided with connection holes for connecting to the connecting rod.

10. A folding frame, characterized in that, The invention includes a folding rod, which comprises a first connecting rod, a second connecting rod, and a folding structure according to any one of claims 1 to 9; one end of the first connecting rod is inserted into the first mounting groove and fixedly connected to the first connecting rod, and one end of the second connecting rod is inserted into the second mounting groove and fixedly connected to the second connecting rod.

Images