U-shaped self-locking buckle

Abstract

According to the U-shaped self-locking buckle, the U-shaped self-locking buckle comprises a U-shaped locking ring, a first movable sleeve piece, a second movable sleeve piece and a locking device. The U-shaped locking ring is provided with a first locking arm and a second locking arm, the end of each locking arm is provided with a first thread, the first movable sleeve piece and the second movable sleeve piece are provided with matched second threads, thread sleeving positions capable of being independently adjusted are formed, and the movable sleeve pieces are allowed to move along the locking arms. The locking device comprises an external member cover, an elastic component and a pin shaft, a spring bolt of the pin shaft is continuously in an extending state by applying force through the elastic component, the spring bolt is inserted into a lock hole formed in the second movable external member, and self-locking and fixing are achieved. The installation difficulty is reduced, the number of components is reduced, the installation process is simplified, the installation efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of outdoor tents, in particular to a U-shaped self-locking buckle. Background Art

[0002] Steel tents are widely used in outdoor activities and emergency rescue scenarios due to their quick setup and flexible use. A secure connection between the tent's membrane and the steel structure is crucial for ensuring the tent's safety and stability. Traditional connection solutions utilize a complex series of components, including lugs, locks, swivels, U-shaped buckles, bolts, and clamps. These components work together to form a complex connection node, securing the membrane to the steel structure.

[0003] While the current connection node design effectively integrates the membrane fabric with the steel structure, its complex assembly of components also presents some significant shortcomings. The need to assemble multiple parts not only increases the operational complexity for on-site workers but also necessitates the presence of professional technicians to ensure proper installation, as failure to do so can easily lead to safety hazards. Furthermore, this cumbersome installation process significantly prolongs construction time, hindering the overall progress of the project. Furthermore, the sheer number of components drives up production costs. From material procurement to processing and manufacturing, each step can incur additional expenses, posing a challenge to the company's profitability and negatively impacting its development. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a U-shaped self-locking buckle to solve or alleviate the problems existing in the above-mentioned prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A U-shaped self-locking buckle comprises: a U-shaped locking ring, a first movable kit, a second movable kit, and a locking device, wherein the U-shaped locking ring has a first locking arm and a second locking arm, the ends of the first locking arm and the second locking arm are both provided with a first thread, the first movable kit and the second movable kit are both provided with a screw hole, and the screw holes are both provided with a second thread matching the first thread, so that the first movable kit and the second movable kit can each independently mate with the first locking arm and the second locking arm one by one to form two threaded sleeve positions, so that the positions of the first movable kit and the second movable kit on the first locking arm and the second locking arm can be adjusted based on the threaded sleeve positions;

[0007] The locking device is disposed in the first movable kit, and includes a kit cover, an elastic component, and a pin. The first movable kit is buckled with the kit cover, and a cavity is defined between the two to form a lock slot. The lock slot has a lock hole defined at one end away from the screw hole of the first movable kit. The pin is slidably mounted in the lock slot, and one end of the pin extends out of the lock slot to form a lock tongue.

[0008] The elastic component is arranged on a side of the lock groove away from the lock hole and contacts the pin shaft so that the pin shaft maintains the state of its lock tongue protruding from the lock hole based on the elastic force; the second movable kit is provided with a keyhole matching the lock tongue, and the lock tongue is inserted into the keyhole to form a locking and fixing structure and make the U-shaped self-locking buckle in a self-locking locking state.

[0009] Optionally, an unlocking device is also included, which is installed on the first movable kit and contacts the pin shaft. The unlocking device is used to push the pin shaft to produce a lateral displacement so that the lock tongue disengages from the keyhole and retracts into the lock groove, so that the U-shaped self-locking buckle is in an unlocked state.

[0010] Optionally, the unlocking device is an unlocking button, a through hole is formed on the first movable kit, the unlocking button comprises a pressing portion and an extrusion portion, the extrusion portion passes through the through hole to form a protrusion on the outer surface of the first movable kit to receive a pressing operation;

[0011] The extrusion portion is provided with an inclined surface structure, and the contact end of the pin shaft and the elastic component is a wedge block structure. The inclined surface structure matches the wedge block structure, so that when the unlocking button is pressed, the wedge block is driven to make the pin shaft slide and produce a lateral displacement. The lateral displacement causes the lock tongue to disengage from the keyhole and retract into the lock groove, so that the U-shaped self-locking buckle is in an unlocked state.

[0012] Optionally, the kit cover is provided with a plurality of assembly holes distributed along the circumferential direction, the first movable kit is provided with positioning holes corresponding to the assembly holes, and the kit cover is fixedly mounted on the first movable kit by bolts.

[0013] Optionally, the unlock button pressing portion is cylindrical, and a limiting convex ring is provided in the middle of the unlock button. The cross-section of the limiting convex ring is larger than the through hole, and the limiting convex ring is provided in the lock groove to limit the movement range of the button.

[0014] Optionally, a limiting protrusion is provided in the middle of the pin shaft, and the cross-section of the limiting protrusion is larger than the lock hole to limit the movement range of the pin shaft.

[0015] Optionally, the elastic component is a spring.

[0016] Optionally, the lock tongue is in the shape of a cuboid.

[0017] Optionally, the keyhole is in the shape of a cuboid to match the lock tongue.

[0018] Optionally, the locking slot is a rectangular cavity structure.

[0019] In the present application, a U-shaped self-locking buckle is provided, which includes: a U-shaped locking ring, a first movable kit, a second movable kit, and a locking device, the U-shaped locking ring has a first locking arm and a second locking arm, the ends of the first locking arm and the second locking arm are both provided with a first thread, the first movable kit and the second movable kit are both provided with a screw hole, and the screw holes are both provided with a second thread matching the first thread, so that the first movable kit and the second movable kit can be independently matched with the first locking arm and the second locking arm one by one to form two threaded socket positions, so as to adjust the positions of the first movable kit and the second movable kit on the first locking arm and the second locking arm based on the threaded socket position; the locking device is provided with a The first movable assembly is placed in the first movable assembly and includes a assembly cover, an elastic component, and a pin. The first movable assembly is engaged with the assembly cover, and a cavity is defined between the two to form a locking slot. The locking slot has a locking hole at one end away from the screw hole of the first movable assembly. The pin is slidably mounted in the locking slot, with one end extending out of the locking slot to form a locking tongue. The elastic component is disposed in the locking slot on a side away from the locking hole and contacts the pin, so that the elastic force causes the pin to maintain a state in which the locking tongue protrudes from the locking hole. The second movable assembly is provided with a keyhole that matches the locking tongue, and the locking tongue is inserted into the keyhole to form a locking and fixing structure and to place the U-shaped self-locking buckle in a self-locking state. This reduces installation difficulty, the number of components, the installation process, and the efficiency of the installation, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0021] Figure 1 This is an exploded view of a U-shaped self-locking buckle according to an embodiment of the present application;

[0022] Figure 2 This is a schematic structural diagram of a U-shaped self-locking buckle according to an embodiment of the present application;

[0023] Figure 3 This is a schematic structural diagram of a U-shaped self-locking buckle according to an embodiment of the present application;

[0024] Figure 4This is a schematic structural diagram of a first movable kit of a U-shaped self-locking buckle according to an embodiment of the present application;

[0025] Figure 5 Schematic diagram of the pin structure of the U-shaped self-locking buckle according to the embodiment of the present application;

[0026] Figure 6 Schematic diagram of the unlocking device structure of the U-shaped self-locking buckle according to the embodiment of the present application;

[0027] Figure 7 Schematic diagram of the unlocking device structure of the U-shaped self-locking buckle according to the embodiment of the present application;

[0028] Among them, the numbers in the figure indicate: 1. U-shaped locking ring; 11. First locking arm; 12. Second locking arm; 13. First thread; 2. First movable kit; 21. Second thread; 22. Positioning hole; 23. Bolt; 24. Locking groove; 25. Locking hole; 26. Through hole; 3. Second movable kit; 31. Keyhole; 4. Locking device; 41. Kit cover; 411. Assembly hole; 42. Elastic component; 43. Pin; 431. Wedge block; 432. Limiting protrusion; 433. Lock tongue; 5. Unlocking device; 51. Unlocking button; 511. Pressing part; 512. Limiting protrusion; 513. Extrusion part. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the term "including" in the specification and claims of this application and the above-mentioned drawings is intended to cover non-exclusive inclusions. In this application, the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit the indicated components to having specific directions. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Figure 1 This is an exploded view of a U-shaped self-locking buckle according to an embodiment of the present application; Figure 2 This is a schematic structural diagram of a U-shaped self-locking buckle according to an embodiment of the present application; Figure 3 This is a schematic structural diagram of a U-shaped self-locking buckle according to an embodiment of the present application; Figure 4 This is a schematic structural diagram of a first movable kit of a U-shaped self-locking buckle according to an embodiment of the present application; Figure 5 Schematic diagram of the pin structure of the U-shaped self-locking buckle according to the embodiment of the present application; Figure 6 Schematic diagram of the unlocking device structure of the U-shaped self-locking buckle according to the embodiment of the present application; Figure 7 Schematic diagram of the unlocking device structure of the U-shaped self-locking buckle according to the embodiment of the present application;

[0033] like Figures 1 to 7 As shown, the present application provides a U-shaped self-locking buckle, which includes: a U-shaped locking ring 1, a first movable kit 2, a second movable kit 3, and a locking device 4, wherein the U-shaped locking ring 1 has a first locking arm 11 and a second locking arm 12, and the ends of the first locking arm 11 and the second locking arm 12 are both provided with a first thread 13, and the first movable kit 2 and the second movable kit 3 are both provided with a screw hole, and the screw hole is provided with a second thread 21 matching the first thread 13, so that the first movable kit 2 and the second movable kit 3 can be independently paired with the first locking arm 11 and the second locking arm 12 one by one to form two threaded socket positions, so as to adjust the positions of the first movable kit 2 and the second movable kit 3 on the first locking arm 11 and the second locking arm 12 based on the threaded socket position; the locking device 4 is arranged on the first movable kit The first movable member 2 includes a cover 41, an elastic member 42, and a pin 43. The first movable member 2 is engaged with the cover 41, with a cavity formed between them to form a locking slot 24. The locking slot 24 has a locking hole 25 at one end away from the screw hole of the first movable member 2. The pin 43 is slidably mounted in the locking slot 24, with one end extending out of the locking slot 24 to form a locking tongue 433. The elastic member 42 is disposed on the side of the locking slot 24 away from the locking hole 25 and contacts the pin 43, so that the pin 43 maintains its locking tongue 433 protruding out of the locking hole 25 due to elastic force. The second movable member 3 is provided with a keyhole 31 that matches the locking tongue 433. The locking tongue 433 is inserted into the keyhole 31 to form a locking and fixing structure and keep the U-shaped self-locking buckle in a self-locking state. This reduces the difficulty of installation, reduces the number of components, simplifies the installation process, improves installation efficiency, and reduces production costs.

[0034] Optionally, an unlocking device 5 is also included, which is installed on the first movable kit 2 and contacts the pin shaft 43. The unlocking device 5 is used to push the pin shaft 43 to produce a lateral displacement so that the lock tongue 433 disengages from the lock eye 31 and retracts into the lock groove 24, so that the U-shaped self-locking buckle is in an unlocked state.

[0035] In this embodiment, the installation of the unlocking device 5 enables quick and convenient operation when the U-shaped self-locking buckle needs to be unlocked. Without the need for additional tools or complicated steps, the user can simply disengage the locking tongue 433 from the keyhole 31 through a simple operation to achieve the unlocked state. This instant unlocking function significantly improves the convenience and flexibility of use. Furthermore, the modular design of the unlocking device 5 facilitates maintenance and replacement, reducing long-term maintenance costs and minimizing the risk of damage or repairs caused by unlocking difficulties. This not only reduces maintenance costs but also extends the service life of the U-shaped self-locking buckle.

[0036] Optionally, the unlocking device 5 is an unlocking button 51. A through hole 26 is formed on the first movable kit 2. The unlocking button 51 includes a pressing portion 511 and an extrusion portion 513. The extrusion portion 513 passes through the through hole 26 to form a protrusion on the outer surface of the first movable kit 2 to receive a pressing operation.

[0037] The extrusion portion 513 is provided with an inclined surface structure, and the contact end of the pin shaft 43 and the elastic component 42 is a wedge block 431 structure. The inclined surface structure matches the wedge block 431 structure, so that when the unlocking button 51 is pressed, the wedge block 431 is driven to make the pin shaft 43 slide and produce a lateral displacement. The lateral displacement causes the lock tongue 433 to disengage from the keyhole 31 and retract into the lock groove 24, so that the U-shaped self-locking buckle is in an unlocked state.

[0038] In this embodiment, the unlocking device 5 is designed as an unlocking button 51, significantly improving the ease of use of the U-shaped self-locking buckle. Users only need to press the button to unlock, eliminating the need for complex operating procedures. The button's raised design makes it easy to reach and quickly locate, improving the user experience. Furthermore, the extrusion portion 513 of the unlocking button 51 matches the wedge-shaped block 431 at the contact end of the pin 43, forming an efficient mechanical transmission mechanism. When the user presses the button, the interaction between the inclined surface and the wedge-shaped block 431 quickly converts the pin 43 into a lateral displacement, causing the lock tongue 433 to disengage from the keyhole 31, achieving rapid unlocking of the buckle and ensuring the buckle's immediate responsiveness. Furthermore, the wedge-shaped block 431 at the contact end of the pin 43 and the elastic component 42, along with the inclined surface of the extrusion portion 513 of the unlocking button 51, together form a stable and durable mechanical system. This design maintains excellent mechanical performance over long-term use, reduces wear and tear, and extends the service life of the U-shaped self-locking buckle. At the same time, the unlocking button 51, as an independent modular component, is easy to maintain and replace later. If the button or related components fail, they can be replaced separately without having to scrap the entire U-shaped self-locking buckle, reducing maintenance costs and potential waste, which is beneficial to environmental protection. Finally, as a simple and effective unlocking device 5, the button-type unlocking device 5 has a relatively low manufacturing cost. At the same time, due to its ease of installation and maintenance, it also reduces the cost-effectiveness of the overall product.

[0039] Optionally, the kit cover 41 is provided with a plurality of circumferentially distributed assembly holes 411 , the first movable kit 2 is provided with positioning holes 22 corresponding to the assembly holes 411 , and the kit cover 41 is fixedly mounted on the first movable kit 2 by bolts 23 .

[0040] In this embodiment, by providing multiple circumferentially distributed assembly holes 411 on the cover 41, which align with the positioning holes 22 on the first movable cover 2 and are secured with bolts 23, the overall structural stability of the U-shaped self-locking buckle is significantly improved. This multi-point fixation design ensures a secure connection between the cover 41 and the first movable cover 2, maintaining a good connection even under external impact or repeated use, reducing the risk of loosening or falling components. Furthermore, the bolt 23 fastening method provides a solution for easy assembly and disassembly. During assembly, the positioning holes 22 and assembly holes 411 can be quickly aligned and tightened with the bolts 23, simplifying the assembly process and improving production efficiency. Similarly, for maintenance or component replacement, the cover 41 and the first movable cover 2 can be separated by simply loosening the bolts 23, facilitating internal inspection and repair, reducing maintenance costs and time. Furthermore, the bolt 23 connection maintains excellent performance in a variety of environmental conditions, including high and low temperatures, and in humid and dry environments. This environmental adaptability broadens the scope of use of the U-shaped self-locking buckle, enabling it to work normally outdoors or under harsh conditions.

[0041] Optionally, the pressing portion 511 of the unlocking button 51 is cylindrical, and a limiting protrusion 512 is provided in the middle of the unlocking button 51. The cross-section of the limiting protrusion 512 is larger than the through hole 26 and is provided in the locking groove 24 to limit the movement range of the button.

[0042] In this embodiment, the pressing portion 511 of the unlock button 51 is designed to be cylindrical, providing the user with an intuitive and easy-to-grip interface. The cylindrical design naturally fits the contours of the finger, making the unlocking operation smoother and more comfortable, thereby improving the user experience. In addition, the limiting protrusion 512 not only prevents the unlock button 51 from completely passing through and falling off by having a cross-section larger than the through hole 26, but also further limits the vertical movement range of the button by being directly located in the lock slot 24. This dual limiting mechanism greatly improves the stability and safety of the unlock button 51, preventing the button from losing control or being damaged due to unexpected situations. Finally, the design of the cylindrical pressing portion 511 and the limiting protrusion 512 not only ensures functionality, but also takes into account cost-effectiveness and production efficiency. These components are relatively simple to manufacture and can be easily mass-produced through methods such as injection molding or stamping, which reduces production costs and improves production efficiency, facilitating the large-scale production and market promotion of U-shaped self-locking buckles.

[0043] Optionally, a limiting protrusion 432 is provided in the middle of the pin shaft 43 , and the cross-section of the limiting protrusion 432 is larger than the locking hole 25 , so as to limit the movement range of the pin shaft 43 .

[0044] Optionally, the elastic component 42 is a spring.

[0045] In this embodiment, a spring is used as the elastic component 42 to provide a stable restoring force, ensuring that the pin 43 remains in its predetermined position when not subject to external forces, such as when the lock tongue 433 is extended. The spring's restoring force ensures that the U-shaped self-locking buckle can maintain its self-locking state without external interference, thereby improving the buckle's stability and reliability. Furthermore, the spring can control the amount of force applied to the pin 43, which is crucial for the smooth insertion and removal of the lock tongue 433. Appropriate spring force not only ensures smooth insertion and removal of the lock tongue 433, but also prevents component damage caused by excessive force, or insufficient force that causes the lock tongue 433 to not securely lock. Furthermore, the spring's durability extends the life of the U-shaped self-locking buckle and reduces maintenance and replacement frequency. Furthermore, as a mature elastic component, the spring offers a high cost-effectiveness, is easy to produce, and maintains consistency during large-scale production, making it suitable for large-scale manufacturing and sales of U-shaped self-locking buckles, thereby enhancing the product's market competitiveness. Finally, the structure of the spring is relatively simple. The spring can maintain its elastic properties over a wide temperature range and under different environmental conditions. It is easy to inspect and replace. Even if the spring is damaged or aged, it can be easily replaced without replacing the entire locking system, reducing maintenance costs and complexity.

[0046] Optionally, the locking tongue 433 is in the shape of a cuboid.

[0047] In this embodiment, the rectangular shape of the locking tongue 433 ensures sufficient structural strength. The rectangular shape of the locking tongue 433 provides a larger contact area in its cross section, which helps disperse the pressure on the locking tongue 433 during the locking and unlocking process, thereby reducing local stress concentration, enhancing the locking tongue 433's resistance to wear and deformation, and extending the service life of the U-shaped self-locking buckle. Furthermore, the rectangular shape of the locking tongue 433 provides excellent guidance during insertion into the keyhole 31. Its right-angled sides help the locking tongue 433 accurately align with the keyhole 31, reducing any movement during insertion and ensuring smooth entry of the locking tongue 433 into the keyhole 31 for precise locking. This design simplifies the locking process and improves the smoothness and reliability of the operation. Furthermore, the rectangular lock tongue 433 has a high degree of fit with the keyhole 31, forming a closer contact and reducing the wiggling space of the lock tongue 433 within the keyhole 31, thereby improving the stability of the lock. This close contact can also increase the difficulty of unlocking, preventing accidental unlocking or unauthorized opening, and enhancing the safety performance of the U-shaped self-locking buckle. At the same time, the rectangular lock tongue 433 is easy to form through stamping, casting, or cutting during the manufacturing process, and the production process is relatively mature, which reduces the manufacturing difficulty and cost. In addition, the standardized rectangular shape facilitates mass production, helps improve production efficiency, reduces the production cost of a single lock tongue 433, and thus reduces the overall cost of the U-shaped self-locking buckle. Subsequently, the rectangular lock tongue 433 is relatively simple in design, which makes it easier to find matching spare parts during routine maintenance or replacement. The standardized shape also facilitates quick identification and replacement, reducing the time and cost of repairs due to damage or wear of the lock tongue 433. Moreover, the rectangular lock tongue 433 is designed to be versatile and can be matched with various types of keyholes 31. It is not limited to U-shaped self-locking buckles, but can also be used in other types of locks, thereby improving its market acceptance and application range.

[0048] Optionally, the keyhole 31 is in the shape of a cuboid to match the lock tongue 433 .

[0049] In this embodiment, the cuboid shape of the keyhole 31 matches the cuboid shape of the locking tongue 433, ensuring precise alignment and close contact between the two. This reduces the wobble of the locking tongue 433 within the keyhole 31, improving the stability and reliability of the lock. Even under external force or vibration, the locking tongue 433 is less likely to dislodge from the keyhole 31, thereby enhancing the overall safety of the U-shaped self-locking buckle. Furthermore, the cuboid shape of the keyhole 31 provides a larger contact surface with the locking tongue 433, more evenly distributing the pressure on the locking tongue 433 during the locking process, reducing localized wear and extending the service life of the keyhole 31 and the locking tongue 433. Furthermore, the cuboid shape of the keyhole 31 is easily formed during manufacturing through methods such as stamping, cutting, or milling, resulting in high production efficiency and low cost. The standardized cuboid design of the keyhole 31 also facilitates mass production, reducing the production cost of individual keyholes 31, thereby reducing the overall cost of the U-shaped self-locking buckle and improving the product's market competitiveness. At the same time, the rectangular shape of the keyhole 31 simplifies maintenance and replacement. If the keyhole 31 or the lock tongue 433 becomes damaged, it's easy to find a matching replacement part. The standardized shape also facilitates quick identification and replacement, reducing the time and cost of repairs due to component damage. Finally, the rectangular keyhole 31 is highly versatile and can be matched with a variety of lock tongues 433. It's not limited to U-shaped self-locking buckles, but can also be used in other devices requiring precise locking. This design compatibility makes the rectangular keyhole 31 a widely applicable solution, increasing its market acceptance and application range.

[0050] Optionally, the locking slot 24 is a rectangular cavity structure.

[0051] In this embodiment, the rectangular cavity structure provides an internal space to accommodate the pin 43, thereby increasing the structural strength of the entire lock buckle. This design allows the lock buckle to withstand greater external forces without being easily deformed or damaged. In addition, the rectangular lock groove 24 can better match the shape of the pin 43, providing more contact area, thereby increasing the friction and gripping force during locking, so that the lock buckle can maintain a secure locking state even under heavy loads or dynamic conditions. In addition, the rectangular cavity structure helps to reduce the chance of moisture, dust or other impurities entering the interior of the lock buckle, improving the reliability and durability of the lock buckle in harsh environments, which is particularly important in outdoor use scenarios. Finally, the rectangular design is generally easier to automate and precisely process than other complex shapes, reducing manufacturing difficulty and cost. At the same time, the standardized rectangular lock groove 24 also facilitates subsequent maintenance and parts replacement.

[0052] Optionally, the U-shaped locking ring 1 is a round steel structure.

[0053] In this embodiment, the use of a round steel structure enables the U-shaped locking ring 1 to remain stable when facing impact, heavy pressure or continuous load. In addition, the U-shaped locking ring 1 has a circular cross-section, which helps to evenly distribute the weight, so that the U-shaped locking ring 1 maintains a good balance when hanging heavy objects. Finally, the U-shaped locking ring 1 with a circular cross-section and round steel structure is easy to process and produce, which helps to control costs.

[0054] Optionally, the number of the assembly hole 411 , the positioning hole 22 , and the bolt 23 are all four.

[0055] In this embodiment, the use of four bolts 23 for fixing can more evenly distribute the tightening force, ensure a more secure connection between the kit cover 41 and the first movable kit 2, and reduce structural deformation or loosening caused by local uneven force. In addition, the four assembly holes 411 and the positioning holes 22 are distributed along the circumference, forming a symmetrical layout, which helps maintain the balance of the U-shaped self-locking buckle and improve the stability of the overall structure. This symmetry also helps to improve the accuracy of processing and assembly. In addition, the four positioning holes 22 and the assembly holes 411 provide more adjustment freedom, facilitating subtle position corrections during the assembly process and ensuring the precise alignment of each component. When maintaining or replacing parts, the multi-point fixation also makes disassembly and reinstallation more convenient. Finally, the standardized four-hole layout design makes the parts of the U-shaped self-locking buckle more interchangeable, facilitating the use of universal accessories for repair or upgrade, reducing maintenance costs, and also making it easier for products of different models or series to share the same components.

[0056] In one possible practical method, when in use, the U-shaped locking ring 1 is inserted into the ear plate on the steel frame structure used to fix the tent, the first movable kit 2 and the second movable kit 3 are respectively mounted on the first locking arm 11 and the second locking arm 12, and screwed to the appropriate positions, and then the tent plywood is inserted into the first movable kit 2 and the second movable kit 3, the unlocking button 51 is pressed to retract the locking tongue 433, and the lock hole 25 of the first movable kit 2 and the lock eye 31 of the second movable kit 3 are aligned; the unlocking button 51 is released to allow the locking tongue 433 to penetrate into the lock eye 31, so that the first movable kit 2 and the second movable kit 3 are stuck in a fixed position, completing the locking.

[0057] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A U-shaped self-locking buckle, characterized in that: include: A U-shaped locking ring (1), a first movable kit (2), a second movable kit (3), and a locking device (4), wherein the U-shaped locking ring (1) has a first locking arm (11) and a second locking arm (12), the ends of the first locking arm (11) and the second locking arm (12) are both provided with a first thread (13), the first movable kit (2) and the second movable kit (3) are both provided with a screw hole, and the screw hole is provided with a second thread (21) matching the first thread (13), so that the first movable kit (2) and the second movable kit (3) can be independently matched with the first locking arm (11) and the second locking arm (12) one by one to form two threaded socket positions, so as to adjust the positions of the first movable kit (2) and the second movable kit (3) on the first locking arm (11) and the second locking arm (12) based on the threaded socket positions; The locking device (4) is arranged in the first movable kit (2), and includes a kit cover (41), an elastic component (42), and a pin (43). The first movable kit (2) and the kit cover (41) are buckled together, and a cavity is provided between the two to form a locking groove (24). The locking groove (24) is provided with a locking hole (25) at one end away from the screw hole of the first movable kit (2). The pin (43) is slidably installed in the locking groove (24), and one end of the pin extends out of the locking groove (24) to form a locking tongue (433). The elastic component (42) is arranged on a side of the lock groove (24) away from the lock hole (25) and contacts the pin shaft (43) so as to keep the pin shaft (43) in a state where its lock tongue (433) protrudes from the lock hole (25) based on the elastic force; the second movable kit (3) is provided with a keyhole (31) matching the lock tongue (433), and the lock tongue (433) is inserted into the keyhole (31) to form a locking and fixing structure and to keep the U-shaped self-locking buckle in a self-locking locking state.

2. The U-shaped self-locking buckle according to claim 1, characterized in that: The invention also includes an unlocking device (5), which is installed on the first movable kit (2) and contacts the pin shaft (43). The unlocking device (5) is used to push the pin shaft (43) to generate a lateral displacement, so that the lock tongue (433) is separated from the lock eye (31) and retracted into the lock groove (24), so that the U-shaped self-locking buckle is in an unlocked state.

3. The U-shaped self-locking buckle according to claim 2, characterized in that: The unlocking device (5) is an unlocking button (51), a through hole (26) is provided on the first movable kit (2), and the unlocking button (51) comprises a pressing portion (511) and an extrusion portion (513), wherein the extrusion portion (513) passes through the through hole (26) to form a protrusion on the outer surface of the first movable kit (2) to receive a pressing operation; The extrusion portion (513) is provided with an inclined surface structure, and the contact end of the pin shaft (43) and the elastic component (42) is a wedge block (431) structure. The inclined surface structure matches the wedge block (431) structure, so that when the unlocking button (51) is pressed, the wedge block (431) is driven to slide the pin shaft (43) and generate a lateral displacement. The lateral displacement causes the lock tongue (433) to disengage from the keyhole (31) and retract into the lock groove (24), so that the U-shaped self-locking buckle is in an unlocked state.

4. The U-shaped self-locking buckle according to claim 3, characterized in that: The kit cover (41) is provided with a plurality of circumferentially distributed assembly holes (411), the first movable kit (2) is provided with positioning holes (22) corresponding to the assembly holes (411), and the kit cover (41) is fixedly mounted on the first movable kit (2) by means of bolts (23).

5. The U-shaped self-locking buckle according to claim 3, characterized in that: The unlock button (51) pressing portion (511) is cylindrical, and a limiting convex ring (512) is provided in the middle of the unlock button (51). The limiting convex ring (512) has a cross section larger than the through hole (26) and is arranged in the locking groove (24) to limit the movement range of the button.

6. The U-shaped self-locking buckle according to claim 1, characterized in that: A limiting protrusion (432) is provided in the middle of the pin shaft (43), and the cross section of the limiting protrusion (432) is larger than the lock hole (25) so as to limit the movement range of the pin shaft (43).

7. The U-shaped self-locking buckle according to claim 1, characterized in that: The elastic component (42) is a spring.

8. The U-shaped self-locking buckle according to claim 1, characterized in that: The lock tongue (433) is in the shape of a cuboid.

9. The U-shaped self-locking buckle according to claim 1, characterized in that: The keyhole (31) is in the shape of a cuboid to match the lock tongue (433).

10. The U-shaped self-locking buckle according to claim 1, characterized in that: The locking groove (24) is a rectangular parallelepiped cavity structure.

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