Self-locking folding structure

Abstract

The utility model discloses a self-locking folding structure which comprises a first folding piece, a second folding piece, an elastic self-locking assembly and an occlusion restraining assembly, the first folding piece and the second folding piece are respectively provided with a first end and a second end which are oppositely arranged, and the first end of the first folding piece and the first end of the second folding piece are arranged in a hinged mode. The elastic self-locking assembly comprises an elastic meshing piece arranged on the first folding piece and a meshing matching piece arranged on the second folding piece, the meshing restraining assembly comprises a tension adjusting piece, and when the elastic meshing piece and the meshing matching piece are meshed with each other, the tension adjusting piece provides tensile force for locking the elastic meshing piece for the elastic meshing piece. According to the utility model, the tension adjusting piece is used for providing tension force for the elastic occlusion piece in the occlusion state, so that the elastic occlusion piece is in the locking state, and the elastic occlusion piece cannot be controlled to release the occlusion state before the tension adjusting piece is released, thereby ensuring that the automatic unlocking is realized without manual misoperation or touching other objects; and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical structures, in particular to a self-locking folding structure. Background Art

[0002] Products such as scooters, bicycles, and drones often utilize tubular or rod-shaped folding structures. These structures typically consist of two foldable fasteners that are locked together using a buckle. After extended use, a small axial gap between the two fasteners can develop, reducing the buckle's locking stability and affecting the proper function of the tubular or rod-shaped folding structure.

[0003] In order to solve the problem of small gaps that are easily generated after long-term use, some folding structures currently on the market are equipped with corresponding elastic structures, which use the elastic structure to provide continuous elastic force so that the two fasteners can maintain a stable locked state. However, this folding structure is easily unlocked by human error or by touching other objects, posing a safety hazard. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a self-locking folding structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a self-locking folding structure, including a first folding piece, a second folding piece, an elastic self-locking component and an engagement constraint component. The first folding piece and the second folding piece each have a first end and a second end arranged relative to each other. The first end of the first folding piece and the first end of the second folding piece are hingedly arranged. The elastic self-locking component includes an elastic engagement piece provided on the first folding piece and an engagement mating piece provided on the second folding piece. The engagement constraint component includes a tension adjusting piece. When the elastic engagement piece and the engagement mating piece engage with each other, the tension adjusting piece provides the elastic engagement piece with a tensioning force to lock it.

[0007] Furthermore, the elastic self-locking component also includes a connecting shaft and an elastic member provided on the first folding member, the elastic bite member is provided with a hinge hole, the elastic bite member is hinged to the connecting shaft through the hinge hole, the elastic member abuts against the elastic bite member, and when the elastic bite member engages with the bite mating member, the elastic member provides a continuous elastic bite force for the elastic bite member.

[0008] Furthermore, the bite constraint assembly also includes an eccentric sleeve, which is provided with an eccentric sleeve hole. The eccentric sleeve is eccentrically connected to the connecting shaft through the eccentric sleeve hole. The eccentric sleeve is passed through the hinge hole. The tension adjustment member is connected to the eccentric sleeve. Under the action of the tension adjustment member, the eccentric sleeve applies tensioning force to the elastic bite member.

[0009] Furthermore, the tension adjusting member includes a first rotating connecting arm, a second rotating connecting arm and a pulling part that are arranged relatively to each other, one end of the first rotating connecting arm and one end of the second rotating connecting arm are both connected to the pulling part, the other end of the first rotating connecting arm and the other end of the second rotating connecting arm are both provided with polygonal connecting holes, and both ends of the eccentric sleeve are provided with polygonal connecting parts that are connected and matched with the polygonal connecting holes.

[0010] Furthermore, the first folding part is provided with a mounting groove, the elastic bite part is arranged in the mounting groove, and the middle part of the elastic bite part is provided with a protrusion extending toward the bottom of the mounting groove. When the force applied by the tension adjustment part causes the protrusion of the elastic bite part to contact the bottom of the mounting groove, the elastic bite part is in a tensioned state.

[0011] Furthermore, the bite constraint assembly also includes a positioning member, which is arranged on the elastic bite member. The tension adjustment member is provided with multiple positioning holes. When the positioning member is embedded in different positioning holes, the elastic bite member is at different tension levels.

[0012] Furthermore, the first folding member and the second folding member are both made of plastic material by injection molding.

[0013] Furthermore, a metal reinforcement is provided inside the first folding member in an installation area corresponding to the elastic engaging member.

[0014] Furthermore, the elastic engaging member is provided with an engaging bayonet, and the engaging mating member is provided with a mating bayonet, and the opening directions of the engaging bayonet and the mating bayonet are opposite.

[0015] Furthermore, the first folding piece is provided with a first through hole along its length direction, and the second folding piece is provided with a second through hole along its length direction. When the first folding piece and the second folding piece are docked, the first through hole and the second through hole are interconnected to form a wire passage.

[0016] Compared with the prior art, the present invention has the following advantages: a self-locking folding structure includes a first folding member, a second folding member, an elastic self-locking assembly, and an engaging and restraining assembly, wherein the first folding member and the second folding member each have a first end and a second end arranged opposite to each other, the first end of the first folding member and the first end of the second folding member being hingedly arranged, the elastic self-locking assembly including an elastic engaging member provided on the first folding member and an engaging mating member provided on the second folding member, and the engaging and restraining assembly including a tension adjusting member, wherein when the elastic engaging member and the engaging mating member engage with each other, the tension adjusting member provides a tensioning force to the elastic engaging member to lock it. The present invention utilizes the tension adjusting member to provide tensioning force to the elastic engaging member in the engaged state, placing the elastic engaging member in a locked state. The elastic engaging member cannot be controlled to release the engaged state before the tension adjusting member is released, thereby ensuring that the structure is not automatically unlocked due to human error or contact with other objects, thereby improving safety in use.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a self-locking folding structure provided by a specific embodiment of the present invention (engaged state);

[0020] Figure 2 A structural diagram of a self-locking folding structure provided by a specific embodiment of the utility model (unengaged state);

[0021] Figure 3 A decomposition of a self-locking folding structure provided by a specific embodiment of the utility model Figure 1 ;

[0022] Figure 4 A decomposition of a self-locking folding structure provided by a specific embodiment of the utility model Figure 2 ;

[0023] Figure 5 A schematic structural diagram of a second folding member in a self-locking folding structure provided in a specific embodiment of the present utility model;

[0024] Figure 6 The present invention is a schematic structural diagram of an engaging member in a self-locking folding structure provided in a specific embodiment of the present invention.

[0025] Reference numerals

[0026] 1. First folding part; 11. Mounting groove; 111. Bottom of the mounting groove; 12. First through hole; 2. Second folding part; 21. Second through hole; 3. Elastic self-locking assembly; 31. Elastic bite part; 311. Hinge hole; 312. Biting bayonet; 313. Mounting hole; 3131. Positioning part; 32. Biting fitting part; 321. Matching bayonet; 33. Connecting shaft; 34. Elastic part; 4. Biting constraint assembly; 41. Tension adjusting part; 411. First rotating connecting arm; 412. Second rotating connecting arm; 413. Pulling part; 414. Polygonal connecting hole; 415. Positioning hole; 42. Eccentric bushing; 421. Eccentric bushing hole; 422. Polygonal connecting part; 5. Metal reinforcement. DETAILED DESCRIPTION

[0027] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] like Figures 1 to 6 As shown, an embodiment of the utility model provides a self-locking folding structure, including a first folding piece 1, a second folding piece 2, an elastic self-locking component 3 and an interlocking constraint component 4. The first folding piece 1 and the second folding piece 2 are rod-shaped or bar-shaped structures. The first folding piece 1 and the second folding piece 2 both have a first end and a second end arranged relatively to each other. The first end of the first folding piece 1 and the first end of the second folding piece 2 are hingedly arranged by a hinge mechanism to ensure that the first folding piece 1 and the second folding piece 2 can rotate relative to each other around the hinge point. The hinge mechanism can be a pin hinge, a movable hinge, a rotating shaft hinge, etc.

[0034] The elastic self-locking assembly 3 includes an elastic engaging member 31 provided on the first folding member 1 and an engaging mating member 32 provided on the second folding member 2. The engaging restraining assembly 4 includes a tensioning member 41. When the elastic engaging member 31 and the engaging mating member 32 engage with each other, the tensioning member 41 provides a locking force to the elastic engaging member 31. The tensioning member 41 is designed to apply appropriate tension to the elastic engaging member 31 when the two engaging members 32 engage, thereby achieving a self-locking effect. In this state, the elastic engaging member 31 and the engaging mating member 32 will not disengage unless an external force is applied to release the tensioning member 41, ensuring safe use. Figure 1 FIG. 3 shows a state where the elastic engaging member 31 and the engaging mating member 32 engage with each other.

[0035] The present invention utilizes the tension adjusting member 41 to provide tensioning force for the elastic bite member 31 in the engaged state, so that the elastic bite member 31 is in a locked state. The elastic bite member 31 cannot be controlled to release the engaged state before the tension adjusting member 41 is released, thereby ensuring that it is not automatically unlocked due to human error or contact with other objects, thereby improving safety of use.

[0036] In one embodiment, the elastic self-locking component 3 also includes a connecting shaft 33 and an elastic member 34 provided on the first folding member 1. The elastic bite member 31 is provided with a hinge hole 311. The elastic bite member 31 is hinged to the connecting shaft 33 through the hinge hole 311. The elastic member 34 abuts against the elastic bite member 31. When the elastic bite member 31 engages with the bite mating member 32, the elastic member 34 provides a continuous elastic bite force for the elastic bite member 31.

[0037] like Figure 3 and Figure 4 As shown, the elastic engaging member 31 is provided with a hinge hole 311, through which the elastic engaging member 31 can rotate on the connecting shaft 33. An elastic member 34 is disposed between the elastic engaging member 31 and the first folding member 1. The elastic member 34 can be made of a material with excellent elastic properties, such as a coil spring or a leaf spring. The elastic member 34 abuts the elastic engaging member 31. When the elastic engaging member 31 engages the engaging member 32 on the second folding member 2, the elastic member 34 provides a continuous elastic engaging force, ensuring the stability and reliability of the engaging process.

[0038] In one embodiment, the bite constraint assembly 4 also includes an eccentric sleeve 42, which is provided with an eccentric sleeve hole 421. The eccentric sleeve 42 is eccentrically connected to the connecting shaft 33 through the eccentric sleeve hole 421. The eccentric sleeve 42 is passed through the hinge hole 311. The tension adjustment member 41 is connected to the eccentric sleeve 42. Under the action of the tension adjustment member 41, the eccentric sleeve 42 applies tension to the elastic bite member 31.

[0039] like Figure 3 and Figure 4 As shown, the eccentric sleeve 42 is mounted on the connecting shaft 33 through the eccentric sleeve hole 421, allowing the eccentric sleeve 42 to rotate around the connecting shaft 33 while maintaining its eccentricity. When the eccentric sleeve 42 rotates, the relative position and angle of the elastic bite member 31 with respect to the connecting shaft 33 are changed. The tension adjustment member 41 is connected to the eccentric sleeve 42. By applying an external force or adjusting the torque, the eccentric sleeve 42 can be rotated on the connecting shaft 33, thereby adjusting the tension applied to the elastic bite member 31.

[0040] In one embodiment, the tension adjusting member 41 includes a first rotating connecting arm 411, a second rotating connecting arm 412 and a pulling portion 413 arranged relatively to each other, one end of the first rotating connecting arm 411 and one end of the second rotating connecting arm 412 are both connected to the pulling portion 413, the other end of the first rotating connecting arm 411 and the other end of the second rotating connecting arm 412 are both provided with a polygonal connecting hole 414, and both ends of the eccentric sleeve 42 are provided with a polygonal connecting portion 422 connected and matched with the polygonal connecting hole 414.

[0041] like Figure 4 As shown, the first and second pivoting connecting arms 411, 412 are each connected to a lever portion 413 at one end, forming a lever structure. This allows the lever portion 413 to synchronously control the movement of the two connecting arms. The lever portion 413 is in the shape of a handle, and the user can apply force to rotate the first and second pivoting connecting arms 411, 412. The polygonal connecting hole 414 is designed to tightly mate with the polygonal connecting portion 422 of the eccentric sleeve 42. The design of the polygonal connecting hole 414 ensures effective torque transmission during rotation, thereby ensuring stable adjustment of the eccentric sleeve 42.

[0042] In one embodiment, the first folding member 1 is provided with a mounting groove 11, and the elastic bite member 31 is provided in the mounting groove 11. The middle part of the elastic bite member 31 is provided with a protrusion extending toward the bottom 111 of the mounting groove. When the force applied by the tension adjustment member 41 causes the protrusion of the elastic bite member 31 to contact the bottom 111 of the mounting groove, the elastic bite member 31 is in a tensioned state.

[0043] like Figure 3As shown, the elastic snap member 31 is installed in the mounting groove 11, its position constrained by the sidewalls of the mounting groove 11, thereby maintaining the correct installation position. The length and shape of the protrusion can be designed as required to ensure that it effectively contacts the bottom 111 of the mounting groove when the tension adjuster 41 applies force. When the tension adjuster 41 acts on the eccentric sleeve 42 and rotates the eccentric sleeve 42, the force exerted by the eccentric sleeve 42 causes the protrusion of the elastic snap member 31 to move until it contacts the bottom 111 of the mounting groove. In this state, the elastic snap member 31 is forced into a tense state.

[0044] The raised portion on the elastic bite 31 can be a single continuous structure or multiple independent raised portions to provide different contact points and supports. In the design, the end of the raised portion can be in an arc shape to reduce wear when contacting the bottom of the groove and increase the contact area, thereby more effectively transmitting the tensioning force to the entire elastic bite 31.

[0045] In one embodiment, a bezel is designed at the first end of the second folding member 2 for accommodating and fixing the snap-fitting member 32. The shape and size of the bezel are designed according to the specifications of the snap-fitting member 32 to ensure its stability and precise positioning during installation.

[0046] The snap-fitting member 32 can be secured in the slot by screws. In this case, the inner wall of the slot can be pre-threaded to facilitate direct screw fastening. This method of fastening provides a reliable mechanical connection and improves the impact and vibration resistance of the snap-fitting member 32. Another method is to use a snap-fit ​​structure to secure the snap-fitting member 32. The slot design can include elastic snaps or slots in certain areas. When the snap-fitting member 32 is inserted, it can be locked into place with slight pressure. The snap-fit ​​structure has the advantage of being faster and easier to install and remove, requiring no tools, making it suitable for applications requiring frequent replacement or adjustment.

[0047] In one embodiment, the bite constraint assembly 4 also includes a positioning member 3131, which is arranged on the elastic bite member 31, and the tension adjustment member 41 is provided with multiple positioning holes 415. When the positioning member 3131 is embedded in different positioning holes 415, the elastic bite member 31 is at different tension levels.

[0048] like Figure 4As shown, a mounting hole 313 is provided on the rear side of the elastic bite member 31, and a positioning member 3131 is fixed in the mounting hole 313. The positioning member 3131 is made of elastic material, and at least part of the positioning member 3131 protrudes from the rear surface of the elastic bite member 31. The multiple positioning holes 415 on the tension adjustment member 41 are arranged vertically. By rotating the tension adjustment member 41, the positioning member 3131 enters into different positioning holes 415 in the form of elastic extrusion, so as to perform positioning and constraint at different tension positions.

[0049] During operation, the user can adjust the position of the positioning member 3131 by rotating the tension adjustment member 41. When the positioning member 3131 is aligned with a certain positioning hole 415, due to the elastic properties of the positioning member 3131, the positioning member 3131 will be squeezed into the hole and fixed in this position. The advantage of this design is that fast and reliable tension adjustment can be achieved without the use of additional tools or components. At the same time, the structural design ensures that the elastic bite member 31 can maintain different tensioning states at different positions of the positioning hole 415. The fixation of the positioning member 3131 in different hole positions provides clear physical feedback. The user can feel the "clicked" state of the positioning member 3131 when entering the positioning hole 415, thereby confirming the success of the adjustment.

[0050] Positioning member 3131 is constructed from highly elastic and wear-resistant engineering rubber or elastic plastic to increase its service life and reliability. Positioning member 3131 can be cylindrical, elliptical, or other suitable shapes to ensure smooth entry into positioning hole 415 and provide secure positioning. Positioning hole 415 on tension adjuster 41 can be designed with a tapered entrance to facilitate positioning member 3131's entry, improving operational comfort and efficiency.

[0051] In one embodiment, the first foldable member 1 and the second foldable member 2 are both injection molded from a high-strength plastic material, which not only takes into account cost-effectiveness but also takes into account the strength, toughness, and wear resistance of the material, making it suitable for a variety of applications. Specific plastic materials may include ABS, polycarbonate (PC), or nylon.

[0052] like Figure 3 As shown, in one embodiment, a metal reinforcement 5 is provided in the interior of the first folding member 1 in an installation area corresponding to the elastic snap member 31 .

[0053] To enhance the strength and stability of the first foldable member 1 during use, a metal reinforcement 5 is installed within it. The metal reinforcement 5 is specifically positioned in the mounting area corresponding to the elastic snap member 31 to enhance the structural strength and stress resistance of this area. The metal reinforcement 5 can be made of stainless steel, aluminum alloy, or other high-strength metal materials.

[0054] The shape and size of the metal reinforcement 5 can be designed according to the shape of the installation groove 11 , and the metal reinforcement 5 is designed to be U-shaped.

[0055] The metal reinforcement 5 is placed into the injection molding material during the injection molding stage of the first folding part 1. After the first folding part 1 is injection-molded, the metal reinforcement 5 is completely wrapped inside the first folding part 1, and the metal reinforcement 5 is not visible from the outside of the first folding part 1. With this design, the metal reinforcement 5 provides additional structural support, especially in stress concentration areas, effectively improving the strength and deformation resistance of the first folding part 1. At the same time, the metal reinforcement 5 is completely wrapped inside the plastic material, and the metal parts are not visible from the outside, thereby maintaining the overall aesthetics and integrated appearance of the first folding part 1. In addition, it is completely covered by the plastic material to avoid direct exposure to the external environment, reducing the risk of corrosion and oxidation.

[0056] like Figure 4 and Figure 6 As shown, the elastic bite part 31 is provided with a bite slot 312, and the bite mating part 32 is provided with a mating slot 321. The opening directions of the bite slot 312 and the mating slot 321 are opposite. This design ensures that when the two are docked, the bite is more secure through the forces in the relative directions.

[0057] like Figure 3 and Figure 5 As shown, the first folding part 1 is provided with a first through hole 12 along its length direction, and the second folding part 2 is provided with a second through hole 21 along its length direction. When the first folding part 1 and the second folding part 2 are docked, the first through hole 12 and the second through hole 21 are interconnected to form a wire passage for wiring or transmission pipelines, which is suitable for product designs that require internal wiring, can effectively hide and protect cables, avoid visual clutter and potential wear caused by exposure, and enhance the overall aesthetics.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A self-locking folding structure, characterized in that: It includes a first folding piece, a second folding piece, an elastic self-locking component and a bite restraint component. The first folding piece and the second folding piece each have a first end and a second end arranged opposite to each other. The first end of the first folding piece and the first end of the second folding piece are hinged. The elastic self-locking component includes an elastic bite piece provided on the first folding piece and a bite mating piece provided on the second folding piece. The bite restraint component includes a tension adjusting piece. When the elastic bite piece and the bite mating piece are engaged with each other, the tension adjusting piece provides the elastic bite piece with a tensioning force to lock it.

2. A self-locking folding structure according to claim 1, characterized in that: The elastic self-locking component also includes a connecting shaft and an elastic member provided on the first folding member. The elastic bite member is provided with a hinge hole. The elastic bite member is hinged to the connecting shaft through the hinge hole. The elastic member abuts against the elastic bite member. When the elastic bite member engages with the bite mating member, the elastic member provides a continuous elastic bite force for the elastic bite member.

3. A self-locking folding structure according to claim 2, characterized in that: The bite constraint assembly also includes an eccentric sleeve, which is provided with an eccentric sleeve hole. The eccentric sleeve is eccentrically connected to the connecting shaft through the eccentric sleeve hole. The eccentric sleeve is inserted into the hinge hole. The tension adjustment member is connected to the eccentric sleeve. Under the action of the tension adjustment member, the eccentric sleeve applies tensioning force to the elastic bite member.

4. A self-locking folding structure according to claim 3, characterized in that: The tension adjusting member includes a first rotating connecting arm, a second rotating connecting arm and a pulling part which are arranged relatively to each other. One end of the first rotating connecting arm and one end of the second rotating connecting arm are connected to the pulling part. The other end of the first rotating connecting arm and the other end of the second rotating connecting arm are both provided with polygonal connecting holes. Both ends of the eccentric sleeve are provided with polygonal connecting parts which are connected and matched with the polygonal connecting holes.

5. The self-locking folding structure according to claim 1, characterized in that: The first folding part is provided with a mounting groove, the elastic bite part is provided in the mounting groove, and the middle part of the elastic bite part is provided with a protrusion extending toward the bottom of the mounting groove. When the force applied by the tension adjustment part causes the protrusion of the elastic bite part to contact the bottom of the mounting groove, the elastic bite part is in a tensioned state.

6. The self-locking folding structure according to claim 1, characterized in that: The bite constraint assembly also includes a positioning member, which is arranged on the elastic bite member. The tension adjustment member is provided with a plurality of positioning holes. When the positioning member is embedded in different positioning holes, the elastic bite member is at different tension levels.

7. The self-locking folding structure according to claim 1, characterized in that: The first folding piece and the second folding piece are both made of plastic material by injection molding.

8. The self-locking folding structure according to claim 7, characterized in that: A metal reinforcement is provided inside the first folding member in an installation area corresponding to the elastic bite member.

9. The self-locking folding structure according to claim 1, characterized in that: The elastic engaging piece is provided with an engaging bayonet, and the engaging matching piece is provided with a matching bayonet. The opening directions of the engaging bayonet and the matching bayonet are opposite.

10. The self-locking folding structure according to claim 1, characterized in that: The first folding piece is provided with a first through hole along its length direction, and the second folding piece is provided with a second through hole along its length direction. When the first folding piece and the second folding piece are connected, the first through hole and the second through hole are connected to each other to form a wire passage.

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