Sports utility buckle

Abstract

The utility model discloses a kind of sports multifunctional buckles, including wristband, first lock catch assembly and second lock catch assembly are respectively inserted in the both ends of wristband, the first lock catch assembly includes first arc-shaped casing, the second lock catch assembly includes second arc-shaped casing, the left end of first arc-shaped casing is matched in second arc-shaped casing;The utility model is by setting the same structure of first opening and closing subassembly and second opening and closing subassembly in first arc-shaped casing interior and the interior of second arc-shaped casing, card plate can overturn a certain angle by pivot, the distance between card plate and wristband becomes larger or smaller, so that wristband only needs to be inserted once, while positioning bead in card plate can be always contacted with arc-shaped casing and arc type positioning groove under the action of spring, so that card plate and the limiting tooth on it and cooperate arc-shaped casing can firmly position wristband, so not only convenient to insert and adjust wristband, but wristband can be fixed firmly.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, specifically relating to a sports-type multi-functional fastener. Background Technology

[0002] A wristband buckle is a device that allows adjustment of the wristband portion of products such as watches and bracelets. Its main function is to allow the wristband to freely extend or shorten and be fixed by installing a contraction section structure and a fixing strap, thereby achieving the purpose of fine adjustment. The wristband is also equipped with a folding section structure and a buckle to allow the wristband to be freely folded and fixed, thereby achieving the purpose of large-range adjustment.

[0003] Most existing buckles have locking components at both ends for wristband insertion. While these locking components can limit and adjust the insertion of the wristband, the process is cumbersome and inconvenient due to the limited space in the locking components and the need for the wristband to be inserted multiple times in different directions. Furthermore, adjusting the wristband length afterwards is even more troublesome. Therefore, a sports-type multi-functional buckle is designed to overcome the above-mentioned technical defects. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sports multi-functional buckle to solve the above-mentioned technical problems.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a sports-type multi-functional buckle, including a wristband. A first locking assembly and a second locking assembly are respectively inserted at both ends of the wristband. The first locking assembly includes a first arc-shaped shell, and the second locking assembly includes a second arc-shaped shell. The first arc-shaped shell fits onto the left end of the second arc-shaped shell. The first arc-shaped shell and the second arc-shaped shell are connected by an extension assembly. The interior of the first arc-shaped shell and the interior of the second arc-shaped shell are respectively provided with a first opening and closing assembly and a second opening and closing assembly arranged opposite to each other. A locking assembly is provided inside the second arc-shaped shell and on the side close to the first arc-shaped shell.

[0008] Preferably, the right end of the first arc-shaped housing is provided with an arc-shaped protrusion, the top center of the first arc-shaped housing is provided with a first insertion hole, the inside of the first insertion hole and the side near the arc-shaped protrusion are fixedly connected with a first fixing rod, and the first opening and closing assembly is installed below the first fixing rod through a rotating shaft.

[0009] Furthermore, the left end of the second arc-shaped housing is provided with an arc-shaped recess that matches the arc-shaped protrusion, and the top right end of the second arc-shaped housing is provided with a second insertion hole. Inside the second insertion hole and near the locking assembly, a fourth fixing rod is fixedly connected. The second opening and closing assembly is mounted below the fourth fixing rod via a rotating shaft. The middle part of the second arc-shaped housing and located between the arc-shaped protrusion and the rotating shaft are provided with a mounting hole, and the locking assembly is mounted inside the mounting hole.

[0010] Furthermore, the extension assembly includes an arc-shaped first extension plate and an arc-shaped second extension plate. One end of the first extension plate is hinged to the interior of the arc-shaped protrusion via a second fixing rod, and one end of the second extension plate is hinged between the arc-shaped recess and the locking assembly via a fifth fixing rod.

[0011] Furthermore, the second extension plate has a through hole at the middle of its right end, and a mating plate is fixedly connected to the middle of the through hole. The first extension plate has a groove at the middle of one side, and the other end of the first extension plate is hinged to the inside of the right end of the through hole by a third fixing rod. The other end of the first extension plate is fitted into the inside of the through hole, and the groove is slidably connected to the outside of the mating plate.

[0012] Furthermore, a limiting post is fixedly connected to the middle of one side of the first extension plate at a position corresponding to the locking assembly. A frustum is fixedly connected to the top of the limiting post, and the diameter of the frustum is larger than the diameter of the limiting post. The top of the frustum has rounded corners.

[0013] Furthermore, the locking assembly includes a rectangular and through mounting shell and two movable locking plates. The mounting shell is fixedly connected to the interior of the second arc-shaped shell, and the two movable locking plates are slidably connected to the interior of the mounting shell. A through keyhole is provided at the center of the top of the mounting shell, and the keyhole corresponds to the through hole and the limiting post. Notches are provided on both sides of the mounting shell at opposite ends. An arc-shaped stop plate is fixedly connected to the center of the inner wall of the notch. The ends of the two movable locking plates that are far apart from each other slide through the mounting shell and the corresponding mounting hole and extend to the outside.

[0014] Furthermore, each of the two movable plates has a U-shaped groove at one end close to each other, and the two movable plates are located inside the corresponding U-shaped grooves. On one side of each movable plate, near the inner wall of the second arc-shaped housing, there is a mounting groove communicating with the corresponding U-shaped groove. At one corner of the two movable plates, near one end close to each other, there is a right-angle groove. A return spring is fixedly connected between the right-angle groove and the mounting groove on the same side. On the other side of each movable plate, corresponding to the mounting groove, there is a stop groove. The stop groove corresponds to the notch. The end of the stop plate away from the inner wall of the notch is located inside the stop groove, and the stop plate contacts the inner wall of the stop groove. A locking plate is fixedly connected to the inner wall of each U-shaped groove, near the right-angle groove. A locking space is formed between the two locking plates. The top of the frustum extends through the through hole and keyhole into the locking space, and the bottom of the frustum contacts the locking plate.

[0015] Furthermore, both the first and second opening and closing components include a locking plate. The two locking plates are rotatably connected to the interior of the first and second arc-shaped housings via a rotating shaft at their close ends. The two locking plates are provided with a circular cavity at the center of their far ends. The center of the circular cavity is provided with a circular hole communicating with the outside. The top center of the locking plate is provided with a plurality of equally spaced limiting teeth.

[0016] Furthermore, a clearance is provided in the middle of the card plate, corresponding to the circular cavity. Positioning beads are slidably connected inside both ends of the circular cavity. One end of the positioning bead passes through the circular hole and extends to the outside. A spring is movably installed inside the circular cavity. Positioning shells are fitted on both ends of the spring. An arc-shaped groove is provided in the middle of the two positioning shells at their opposite ends. The other end of the positioning bead is located inside the arc-shaped groove. Arc-shaped positioning grooves are provided on both inner walls of the first and second arc-shaped shells. The arc-shaped positioning grooves cooperate with the extended ends of the positioning beads. The center of the arc-shaped positioning groove is in the same plane as the central axis of the rotating shaft. The positioning bead is made of ceramic.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention features a first and a second opening / closing assembly with identical structures, respectively located inside the first and second arc-shaped housings. The locking plate can be rotated at a certain angle via a pivot, increasing or decreasing the distance between the locking plate and the wristband. This allows the wristband to be inserted only once. Simultaneously, the positioning bead inside the locking plate remains in contact with the arc-shaped housing and the arc-shaped positioning groove under the action of a spring, ensuring that the locking plate and its limiting teeth, in conjunction with the arc-shaped housing, firmly position the wristband. This not only makes inserting and adjusting the wristband convenient but also ensures that the wristband is securely fixed. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a portion of the three-dimensional structure of this utility model;

[0021] Figure 2 This is a schematic diagram of a portion of the structure from another perspective in this utility model;

[0022] Figure 3 This is a schematic diagram of the connection between the first locking assembly and the second locking assembly in this utility model;

[0023] Figure 4 This is an exploded view of the first and second locking components in this utility model.

[0024] Figure 5 This is an exploded view of the second locking assembly in this utility model;

[0025] Figure 6 This is a schematic diagram of the exploded structure of the locking component in this utility model;

[0026] Figure 7 This is an exploded view of the opening and closing component in this utility model.

[0027] The markings in the attached diagram are as follows: 1. Wristband; 2. First locking assembly; 201. First arc-shaped housing; 202. First insertion hole; 203. First fixing rod; 204. Arc-shaped protrusion; 205. Second fixing rod; 206. First extension plate; 207. Groove; 208. Limiting post; 209. Third fixing rod; 3. Second locking assembly; 301. Second arc-shaped housing; 302. Second insertion hole; 303. Fourth fixing rod; 304. Arc-shaped recess; 305. Fifth fixing rod; 306. Second extension plate; 3 07. Through hole; 308. Mounting hole; 4. Locking assembly; 401. Mounting shell; 402. Key hole; 403. Notch; 404. Stop plate; 405. Movable locking plate; 406. Stop groove; 407. Mounting groove; 408. U-shaped groove; 409. Return spring; 410. Locking plate; 5. First opening and closing assembly; 6. Rotating shaft; 7. Second opening and closing assembly; 8. Locking plate; 801. Limiting tooth; 802. Circular cavity; 803. Clearance; 804. Spring; 805. Positioning shell; 806. Positioning bead. Detailed Implementation

[0028] This specific embodiment is a sports-type multi-functional buckle, and its structural diagram is as follows: Figures 1-7 As shown, the device includes a wristband 1, with a first locking assembly 2 and a second locking assembly 3 inserted at both ends of the wristband 1. The first locking assembly 2 includes a first arc-shaped housing 201, and the second locking assembly 3 includes a second arc-shaped housing 301. The first arc-shaped housing 201 is fitted to the left end of the second arc-shaped housing 301. The first arc-shaped housing 201 and the second arc-shaped housing 301 are connected by an extension assembly. The interior of the first arc-shaped housing 201 and the interior of the second arc-shaped housing 301 are respectively provided with a first opening and closing assembly 5 and a second opening and closing assembly 7 arranged opposite to each other. The interior of the second arc-shaped housing 301 and the side close to the first arc-shaped housing 201 are provided with a locking assembly 4.

[0029] Specifically, during use, the two ends of the wristband 1 pass through the first arc-shaped housing 201 and are positioned by the first opening and closing component 5 and the second arc-shaped housing 301, respectively, and are positioned by the second opening and closing component 7. At the same time, the first opening and closing component 5 and the second opening and closing component 7 can open and close to position and release the wristband 1, making it easy to insert, position and adjust the length of the wristband 1. Meanwhile, the first arc-shaped housing 201 and the second arc-shaped housing 301 can be connected by the extension component and the locking component 4 can be used to store and unfold them. It is not only convenient to use, but also stable and reliable.

[0030] Furthermore, the right end of the first arc-shaped housing 201 is provided with an arc-shaped protrusion 204, and the top center of the first arc-shaped housing 201 is provided with a first insertion hole 202. A first fixing rod 203 is fixedly connected to the inside of the first insertion hole 202 and to the side near the arc-shaped protrusion 204. The first opening and closing assembly 5 is installed below the first fixing rod 203 via a rotating shaft 6. One end of the wristband 1 is inserted from the outside into the inside of the first arc-shaped housing 201 and the first insertion hole 202, and then passes around the top of the first fixing rod 203 and is inserted into the inside of the first arc-shaped housing 201 again. Finally, it extends outward from the top of the first opening and closing assembly 5. At this time, the first opening and closing component 5 is in the open state. After one end of the wristband 1 extends outward, it presses the first opening and closing component 5 into the interior of the first arc-shaped housing 201, causing the first opening and closing component 5 to rotate around the pivot 6 and move inward to position one end of the wristband 1. When a sound is heard, it indicates that the first opening and closing component 5 is locked, so that one end of the wristband 1 is folded and limited by the compression of the first opening and closing component 5 and the first arc-shaped housing 201. When the extension end of one end of the wristband 1 is pulled down, it can drive the first opening and closing component 5 to flip down, so that one end of the wristband 1 loses its limit and the length of one end of the wristband 1 can be adjusted.

[0031] Furthermore, the left end of the second arc-shaped housing 301 is provided with an arc-shaped recess 304 that mates with the arc-shaped protrusion 204. The top right end of the second arc-shaped housing 301 is provided with a second insertion hole 302. A fourth fixing rod 303 is fixedly connected inside the second insertion hole 302 and near the locking assembly 4. The second opening and closing assembly 7 is installed below the fourth fixing rod 303 via a rotating shaft 6. The middle part of the second arc-shaped housing 301, located between the arc-shaped protrusion 204 and the rotating shaft 6, is provided with a mounting hole 308. The locking assembly 4 is installed inside the mounting hole 308. The other end of the wristband 1 is inserted from the outside into the interior of the second arc-shaped housing 301 and the second insertion hole 302, and then passes around the top of the fourth fixing rod 303 and moves towards the second arc-shaped housing 301 again. The wristband 1 is inserted into the interior of the second arc-shaped housing 301 and extends outward through the top of the second opening and closing component 7. At this time, the second opening and closing component 7 is in the open state. After the other end of the wristband 1 extends outward, the second opening and closing component 7 is pressed into the interior of the second arc-shaped housing 301, so that the second opening and closing component 7 rotates around the pivot 6 and moves inward to position the other end of the wristband 1. When a sound is heard, it indicates that the second opening and closing component 7 is locked, so that the other end of the wristband 1 is folded and is limited by the compression of the second opening and closing component 7 and the second arc-shaped housing 301. When the extension end of the other end of the wristband 1 is pulled down, it can drive the second opening and closing component 7 to flip down, so that the other end of the wristband 1 loses its limit and the length of the other end of the wristband 1 can be adjusted.

[0032] Furthermore, the extension assembly includes an arc-shaped first extension plate 206 and an arc-shaped second extension plate 306. One end of the first extension plate 206 is hinged to the interior of the arc-shaped protrusion 204 via a second fixing rod 205, and one end of the second extension plate 306 is hinged between the arc-shaped recess 304 and the locking assembly 4 via a fifth fixing rod 305. One end of the first extension plate 206 can rotate around the second fixing rod 205 within the arc-shaped protrusion 204, and the second extension plate 306 can rotate around the fifth fixing rod 305 within the second arc-shaped housing 301, thereby causing the first arc-shaped housing 201 and the first extension plate 206 to rotate relative to each other, and the second arc-shaped housing 301 and the second extension plate 306 to rotate relative to each other.

[0033] Furthermore, a through hole 307 is provided at the middle of the right end of the second extension plate 306, and a mating plate is fixedly connected to the middle of the through hole 307. A groove 207 is provided at the middle of one side of the first extension plate 206. The other end of the first extension plate 206 is hinged to the inside of the right end of the through hole 307 through a third fixing rod 209. The other end of the first extension plate 206 is fitted inside the through hole 307, and the groove 207 is slidably connected to the outside of the mating plate. The first extension plate 206 is rotatably connected to the second extension plate 306 through the third fixing rod 209 and forms a whole, so that the first extension plate 206 and the second extension plate 306 can rotate relative to each other, so that the first extension plate 206 can be folded into the inside of the second extension plate 306, so that the first arc-shaped shell 201 and the second arc-shaped shell 301 cooperate with each other to form an arc-shaped structure. At this time, the mating plate is fitted inside the groove 207, and the arc-shaped protrusion 204 can be fitted inside the arc-shaped recess 304, ensuring the stability of the cooperation between the first arc-shaped shell 201 and the second arc-shaped shell 301.

[0034] In addition, a limiting post 208 is fixedly connected to the middle of one side of the first extension plate 206 at a position corresponding to the locking assembly 4. A frustum is fixedly connected to the top of the limiting post 208, and the diameter of the frustum is larger than the diameter of the limiting post 208. The top of the frustum is rounded. The limiting post 208 and the frustum are an integral structure. This structure can fit into the locking assembly 4, so that the first extension plate 206 is retracted into the second extension plate 306, thereby making the first arc-shaped housing 201 and the second arc-shaped housing 301 cooperate with each other.

[0035] Furthermore, the locking assembly 4 includes a rectangular and through mounting shell 401 and two movable locking plates 405. The mounting shell 401 is fixedly connected to the interior of the second arc-shaped shell 301, and the two movable locking plates 405 are slidably connected to the interior of the mounting shell 401. A through keyhole 402 is provided at the center of the top of the mounting shell 401, which corresponds to the through hole 307 and the limiting post 208. Notches 403 are provided alternately on both sides of the mounting shell 401, and an arc-shaped stop plate 404 is fixedly connected to the center of the inner wall of the notch 403. The two movable locking plates 405 are mutually... The ends that are furthest apart slide through the mounting shell 401 and the corresponding mounting hole 308 and extend to the outside; wherein the mounting shell 401 is a rectangular plate that is bent to form a rectangular structure with a through center. The mounting shell 401 can limit and guide the two movable plates 405. By pressing the extended ends of the two movable plates 405 at the same time, the two movable plates 405 can move relative to each other within the mounting shell 401, so that the limiting post 208 and the frustum lose their limit. Releasing the extended ends of the two movable plates 405 can limit the limiting post 208 and the frustum.

[0036] Furthermore, each of the two movable plates 405 has a U-shaped groove 408 at one end close to each other, and the two movable plates 405 are respectively located inside the corresponding U-shaped groove 408. Each of the two movable plates 405 has a mounting groove 407 on one side near the inner wall of the second arc-shaped housing 301, which communicates with the corresponding U-shaped groove 408. Each of the two movable plates 405 has a right-angle groove at one corner on the outer side of one end close to each other. A return spring 409 is fixedly connected between the right-angle groove and the mounting groove 407 on the same side. On the other side of the movable plate 405, corresponding to the mounting groove 407, there are stop grooves 406. The stop grooves 406 correspond to the notches 403. The end of the stop plate 404 away from the inner wall of the notch 403 is located inside the stop groove 406, and the stop plate 404 contacts the inner wall of the stop groove 406. The inner walls of the two U-shaped grooves 408 and the side near the right-angle groove are fixedly connected to the locking plates 410. A locking space is formed between the two locking plates 410. The top of the frustum passes through the through hole 307 and the key hole 402 and extends into the locking space. The bottom end of the frustum contacts the locking plate 410; the two movable plates 405 are interlocked at their near ends by U-shaped grooves 408, and under the action of two return springs 409, the two movable plates 405 form a locking structure; when it is necessary to separate the first extension plate 206 and the second extension plate 306, by squeezing the extension ends of the two movable plates 405 with two fingers, the two movable plates 405 can slide relative to each other in the mounting shell 401, so that the ends of the two staggered U-shaped grooves 408 are far apart. When the two movable locking plates 405 are separated, they press the return spring 409 through the mounting groove 407 and the right-angle groove, causing the two locking plates 410 to move away from each other, thereby expanding the locking space to be larger than the diameter of the frustum. This allows the limiting post 208 and the frustum to be moved out of the mounting shell 401. When the limiting post 208 and the frustum are limited, when the two movable locking plates 405 are released, the return spring 409 can cause them to move relative to each other and outward, thereby reducing the locking space and causing the frustum to be locked between the two locking plates 410.

[0037] In addition, both the first opening and closing assembly 5 and the second opening and closing assembly 7 include a locking plate 8. The two locking plates 8 are rotatably connected to the interior of the first arc-shaped housing 201 and the interior of the second arc-shaped housing 301 via a rotating shaft 6 at their respective close ends. The two locking plates 8 are provided with a circular cavity 802 at the center of their far ends. The circular cavity 802 is provided with a circular hole communicating with the outside at the center of its center. The top center of the locking plate 8 is provided with multiple equally spaced limiting teeth 801. By pushing the locking plate 8 inward, it can rotate around the corresponding rotating shaft 6, allowing the locking plate 8 to enter the corresponding arc-shaped housing. At this time, the locking plate 8 compresses and limits the wristband 1, and the limiting teeth 801 can engage the wristband 1, so that the folded wristband 1 is firmly limited in the arc-shaped housing. By flipping the locking plate 8, it is easy to insert and position the wristband 1, which greatly saves time.

[0038] Furthermore, a clearance 803 is provided in the middle of the card plate 8, corresponding to the circular cavity 802. Positioning beads 806 are slidably connected to both ends of the circular cavity 802. One end of the positioning bead 806 passes through the circular hole and extends to the outside. A spring 804 is movably installed inside the circular cavity 802. Positioning shells 805 are fitted onto both ends of the spring 804. An arc-shaped groove is provided in the middle of the two positioning shells 805 at their opposite ends. The other end of the positioning bead 806 is located inside the arc-shaped groove. The inner walls of the first arc-shaped shell 201 and the second arc-shaped shell... Both inner walls of 301 are provided with arc-shaped positioning grooves, which cooperate with the extension end of positioning bead 806. The center of the arc-shaped positioning groove is in the same plane as the central axis of the rotating shaft 6. The positioning bead 806 is made of ceramic. When positioning the wristband 1, simply press the retaining plate 8 into the inner side of the arc-shaped housing. One end of the retaining plate 8 rotates around the rotating shaft 6. When the retaining plate 8 enters the arc-shaped housing, the positioning bead 806 can contact and roll with the inner wall of the arc-shaped housing, reducing the friction between them. At the same time, the positioning bead 806 is squeezed by the inner wall of the arc-shaped housing. The two positioning beads 806 retract into the circular cavity 802, and can compress the spring 804 through the corresponding positioning shell 805, thus allowing the positioning beads 806 to move smoothly. When the positioning beads 806 enter the arc-shaped positioning groove, under the action of the spring 804 resetting, the positioning beads 806 can be locked into the arc-shaped positioning groove and make a knocking sound. At this time, the locking plate 8 is positioned, so that the locking plate 8 positions the wristband 1. At the same time, the positioning beads 806 have strong hardness and wear resistance, which improves their service life in this environment. When the positioning beads 806 If the positioning bead 806 is damaged after prolonged use, the positioning bead 806 on one side can be pushed inward by the ejector pin, which will compress the spring 804 until the positioning bead 806 moves to the clearance 803. Then, hold the spring 804 and remove it from the ejector pin, and remove the damaged positioning bead 806. At the same time, put a new positioning bead 806 into the circular cavity 802. Then, slowly release the spring 804 so that one end of it drives the positioning shell 805 to slide in the circular cavity 802 until the positioning shell 805 touches the new positioning bead 806. At this time, one end of the new positioning bead 806 will protrude from the circular hole.

[0039] All technical features in this embodiment can be freely combined according to actual needs.

[0040] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A sports-type multi-functional buckle, comprising a wristband (1), characterized in that, The wristband (1) has a first buckle assembly (2) and a second buckle assembly (3) inserted at both ends. The first buckle assembly (2) includes a first arc-shaped housing (201), and the second buckle assembly (3) includes a second arc-shaped housing (301). The first arc-shaped housing (201) is fitted to the left end of the second arc-shaped housing (301). The first arc-shaped housing (201) and the second arc-shaped housing (301) are connected by an extension assembly. The interior of the first arc-shaped housing (201) and the interior of the second arc-shaped housing (301) are respectively provided with a first opening and closing assembly (5) and a second opening and closing assembly (7) arranged opposite to each other. The interior of the second arc-shaped housing (301) and the side close to the first arc-shaped housing (201) are provided with a locking assembly (4).

2. The sports-type multi-functional buckle according to claim 1, characterized in that: The right end of the first arc-shaped housing (201) is provided with an arc-shaped protrusion (204), and the top center of the first arc-shaped housing (201) is provided with a first insertion hole (202). The first insertion hole (202) is fixedly connected to the inside of the first insertion hole (202) and to the side near the arc-shaped protrusion (204). The first opening and closing assembly (5) is installed below the first fixed rod (203) via a rotating shaft (6).

3. The sports-type multi-functional buckle according to claim 2, characterized in that: The left end of the second arc-shaped housing (301) is provided with an arc-shaped recess (304) that cooperates with the arc-shaped protrusion (204). The top right end of the second arc-shaped housing (301) is provided with a second insertion hole (302). A fourth fixing rod (303) is fixedly connected inside the second insertion hole (302) and near the locking assembly (4). The second opening and closing assembly (7) is installed below the fourth fixing rod (303) via a rotating shaft (6). The middle part of the second arc-shaped housing (301) and between the arc-shaped protrusion (204) and the rotating shaft (6) is provided with a mounting hole (308). The locking assembly (4) is installed inside the mounting hole (308).

4. The sports-type multi-functional buckle according to claim 3, characterized in that: The extension assembly includes an arc-shaped first extension plate (206) and an arc-shaped second extension plate (306). One end of the first extension plate (206) is hinged to the interior of the arc-shaped protrusion (204) via a second fixing rod (205), and one end of the second extension plate (306) is hinged between the arc-shaped recess (304) and the locking assembly (4) via a fifth fixing rod (305).

5. A sports-type multi-functional buckle according to claim 4, characterized in that: The second extension plate (306) has a through hole (307) in the middle of its right end. A mating plate is fixedly connected to the middle of the through hole (307). The first extension plate (206) has a groove (207) in the middle of one side. The other end of the first extension plate (206) is hinged to the inside of the right end of the through hole (307) by a third fixing rod (209). The other end of the first extension plate (206) is fitted into the inside of the through hole (307). The groove (207) is slidably connected to the outside of the mating plate.

6. A sports-type multi-functional buckle according to claim 5, characterized in that: A limiting post (208) is fixedly connected to the middle of one side of the first extension plate (206) at a position corresponding to the locking assembly (4). A frustum is fixedly connected to the top of the limiting post (208), and the diameter of the frustum is larger than the diameter of the limiting post (208). The top of the frustum has rounded corners.

7. A sports-type multi-functional buckle according to claim 6, characterized in that: The locking assembly (4) includes a rectangular and through mounting shell (401) and two movable locking plates (405). The mounting shell (401) is fixedly connected to the inside of the second arc-shaped shell (301). The two movable locking plates (405) are slidably connected to the inside of the mounting shell (401). The top center of the mounting shell (401) is provided with a through keyhole (402). The keyhole (402) corresponds to the through hole (307) and the limiting post (208). The two sides of the mounting shell (401) are provided with staggered notches (403). The inner wall of the notch (403) is fixedly connected with an arc-shaped stop plate (404). The two movable locking plates (405) are slidably connected to each other at opposite ends, passing through the mounting shell (401) and the corresponding mounting hole (308) and extending to the outside.

8. A sports-type multi-functional buckle according to claim 7, characterized in that: Each of the two movable plates (405) has a U-shaped groove (408) at one end close to each other. The two movable plates (405) are located inside the corresponding U-shaped grooves (408). One side of each of the two movable plates (405) and near the inner wall of the second arc-shaped housing (301) is provided with a mounting groove (407) that communicates with the corresponding U-shaped groove (408). One corner of each of the two movable plates (405) at one end close to each other and located on the outer side is provided with a right-angle groove. A return spring (409) is fixedly connected between the right-angle groove and the mounting groove (407) on the same side. The other side of each of the two movable plates (405) and near the inner wall of the second arc-shaped housing (301) is provided with a right-angle groove. The mounting slot (407) is provided with a stop slot (406) at the corresponding position. The stop slot (406) corresponds to the notch (403). The end of the stop plate (404) away from the inner wall of the notch (403) is located inside the stop slot (406), and the stop plate (404) contacts the inner wall of the stop slot (406). The inner walls of the two U-shaped slots (408) and the side near the right angle slot are fixedly connected with locking plates (410). A locking space is formed between the two locking plates (410). The top of the frustum passes through the through hole (307) and the key hole (402) and extends into the locking space, and the bottom of the frustum contacts the locking plate (410).

9. A sports-type multi-functional buckle according to claim 8, characterized in that: The first opening and closing component (5) and the second opening and closing component (7) both include a locking plate (8). The two locking plates (8) are rotatably connected to the interior of the first arc-shaped housing (201) and the interior of the second arc-shaped housing (301) respectively through a rotating shaft (6). The two locking plates (8) are provided with a circular cavity (802) in the middle of the ends that are far apart from each other. The circular cavity (802) is provided with a circular hole communicating with the outside in the middle. The top of the locking plate (8) is provided with a plurality of limiting teeth (801) that are evenly distributed.

10. A sports-type multi-functional buckle according to claim 9, characterized in that: A clearance (803) is provided in the middle of the card plate (8) and at a position corresponding to the circular cavity (802). Positioning beads (806) are slidably connected inside both ends of the circular cavity (802). One end of the positioning bead (806) passes through the circular hole and extends to the outside. A spring (804) is movably installed inside the circular cavity (804). Positioning shells (805) are fitted on both ends of the spring (804). An arc-shaped groove is provided in the middle of the two positioning shells (805) at their opposite ends. The other end of the positioning bead (806) is located inside the arc-shaped groove. Arc-shaped positioning grooves are provided on both inner walls of the first arc-shaped shell (201) and both inner walls of the second arc-shaped shell (301). The arc-shaped positioning grooves cooperate with the extended end of the positioning bead (806). The center of the arc-shaped positioning groove is in the same plane as the central axis of the rotating shaft (6). The positioning bead (806) is made of ceramic.

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