Butterfly buckle

Abstract

The invention discloses a butterfly buckle, and relates to the technical field of building reinforcing members, the butterfly buckle comprises a buckle body, a sleeve, a plurality of friction blocks and an adjusting assembly, the buckle body is provided with a first end and a second end which are oppositely distributed, and the first end is provided with a fixing part; the sleeve penetrates through the buckle body and is arranged towards the second end along the first end; the multiple friction blocks are evenly distributed in the circumferential direction of the sleeve, and the ends, facing the center of the sleeve, of the friction blocks can penetrate into the inner side of the sleeve. The adjusting assembly is connected with the multiple friction blocks and can drive the friction blocks to move to the first position or the second position in the radial direction of the sleeve, and at the first position, the multiple friction blocks penetrate into the inner side of the sleeve. The butterfly buckle is more convenient to disassemble and assemble, and fixation is firmer when supporting formworks are connected.

Description

Technical Field

[0001] The invention relates to the technical field of building reinforcement pieces, in particular to a butterfly buckle. Background Art

[0002] In construction projects, formwork is needed for support during concrete pouring or other construction operations. The fixation of the formwork requires the cooperation of butterfly buckles and steel pipes. Specifically, the steel pipes are arranged against the formwork in the horizontal and vertical directions, and a fixed pull rod is provided in the direction perpendicular to the surface of the formwork. The fixed pull rod passes through the butterfly buckle, and the butterfly buckle abuts against the steel pipe and uses the steel pipe to support the formwork. In some existing butterfly buckles, the connection between the fixed pull rod and the butterfly buckle is a threaded connection, which is relatively cumbersome when installing and removing the butterfly buckle. There are also some butterfly buckles, such as the document with publication number CN215107368U, which uses a rotatable pin to abut the surface of the fixed pull rod to achieve the installation of the butterfly buckle, but the force between the pin and the fixed pull rod is limited, and a spring is needed to maintain the contact between the pin and the fixed pull rod, so the butterfly buckle is easy to loosen when subjected to a large load. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a butterfly buckle that is more convenient to assemble and disassemble and more securely fixes when connecting a support formwork.

[0004] A butterfly buckle according to an embodiment of the present invention includes a buckle body having a first end and a second end that are oppositely distributed, wherein the first end is provided with a fixing portion; a sleeve, the sleeve passing through the buckle body and arranged along the first end toward the second end; a plurality of friction blocks, wherein the plurality of friction blocks are evenly distributed around the circumference of the sleeve, and one end of the friction block facing the center of the sleeve can penetrate into the inner side of the sleeve; An adjusting component is connected to the plurality of friction blocks, and the adjusting component can drive the friction blocks to move radially along the sleeve to a first position or a second position. In the first position, the plurality of friction blocks all penetrate into the inner side of the sleeve.

[0005] The butterfly buckle according to the embodiment of the present invention has at least the following beneficial effects: the butterfly buckle mainly includes a buckle body, a fixing portion is provided at the first end of the buckle body for contacting the fixed steel pipe, and the buckle body is provided with a sleeve for the fixed pull rod to pass through; the fixed pull rod passes through the sleeve, and the adjustment assembly is used to move multiple friction blocks to the first position, and the friction blocks pass through the inner side of the sleeve and frictionally contact with the surface of the fixed pull rod to achieve fixation between the buckle body and the fixed pull rod, making it more convenient to install or remove the buckle body; at the same time, the friction contact between the multiple friction blocks and the fixed pull rod can generate greater friction force, and the buckle body is not easy to loosen even when subjected to a larger load.

[0006] According to some embodiments of the present invention, a plurality of guide grooves are provided on the side wall of the sleeve, and the plurality of guide grooves are distributed around the circumference of the sleeve. The guide grooves pass through the side wall of the sleeve, and each of the friction blocks is arranged in one of the guide grooves, and the friction block slides in the guide grooves.

[0007] According to some embodiments of the present invention, the side of the friction block facing the center of the sleeve is a friction surface, and the side of the friction block away from the center of the sleeve is a guide slope, and along the direction from the first end to the second end, the guide slope gradually moves away from the center of the sleeve, and the adjustment assembly includes a limit member and a control member, the limit member is mounted on the friction block and contacts the guide slope, and the control member is connected to the limit member to drive the limit member to move along the axial direction of the sleeve.

[0008] According to some embodiments of the present invention, the control member includes a first rod portion and a second rod portion, the first rod portion and the second rod portion intersect to form an angle, the intersection of the first rod portion and the second rod portion is hinged to the buckle body, the first rod portion extends to the outside of the buckle body, and the second rod portion is movably connected to the limit member, when the first rod portion rotates around the hinge point to approach the buckle body, the second rod portion drives the limit member to move toward the first end, when the first rod portion rotates around the hinge point to move away from the buckle body, the second rod portion drives the limit member to move toward the second end, the first rod portion is provided with a card slot, when the first rod portion is away from the buckle body, the card slot is located on the outside of the buckle body, the card slot is inserted with a card block, and the card block is located between the first rod portion and the buckle body.

[0009] According to some embodiments of the present invention, the guide groove is provided with a margin along the axial direction of the sleeve, and the friction block can move in the guide groove along the axial direction of the sleeve.

[0010] According to some embodiments of the present invention, a spring is provided between the second rod portion and the buckle body, and the spring is configured to drive the second rod portion to rotate so as to keep the limiting member having a tendency to move toward the second end.

[0011] According to some embodiments of the present invention, flanges are provided on both sides of the guide slope of the friction block, and the flanges can abut against the outer surface of the sleeve to prevent the guide slope from extending into the inner side of the sleeve.

[0012] According to some embodiments of the present invention, the roughness of the friction surface is greater than the roughness of the guiding inclined surface.

[0013] According to some embodiments of the present invention, a chamfer is provided on a side of the friction block facing the first end, and the chamfer is located on one side of the friction surface.

[0014] According to some embodiments of the present invention, the fixing portion includes two arc-shaped slots, and the two arc-shaped slots are symmetrically arranged on the buckle body with the central axis of the sleeve as the symmetry axis.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 This is a schematic diagram of the structure for fixing the template by connecting the butterfly buckle and the fixed rod; Figure 2 This is a schematic structural diagram of a butterfly buckle according to an embodiment of the present invention; Figure 3 is a cross-sectional view of a butterfly buckle according to an embodiment of the present invention; Figure 4 Schematic diagram of a partial enlargement of a butterfly buckle according to an embodiment of the present invention.

[0017] Figure Number: Fixed tie rod 001, steel pipe 002, template 003; Buckle body 100, fixing part 110, arc-shaped slot 111, sleeve 200, guide slot 210, friction block 300, friction surface 301, guide slope 302, flange part 310, adjustment assembly 400, limit part 410, control part 420, first rod part 421, second rod part 422, slot 423, block 430, spring 440. DETAILED DESCRIPTION

[0018] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0020] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] As described in the background technology, Figure 1 This is a schematic diagram of the connection between the butterfly buckle and the fixed tie rod 001. The butterfly buckle abuts against the steel pipe 002, reinforcing the formwork 003 through the contact between the steel pipe 002 and the formwork 003. It should be understood that the structure and installation of the formwork, fixed tie rod, and steel pipe are all prior art and will not be further described in detail here. The main improvement of the present invention lies in the butterfly buckle used in conjunction with the formwork, fixed tie rod, and steel pipe, so the structure of the butterfly buckle is further explained.

[0023] Reference Figure 2 As shown, a butterfly buckle according to an embodiment of the present invention includes a buckle body 100 , a sleeve 200 , a plurality of friction blocks 300 and an adjustment assembly 400 .

[0024] The buckle body 100 has a first end and a second end facing each other. The first end is provided with a fixing portion 110. A sleeve 200 extends through the buckle body 100, extending from the first end toward the second end. The sleeve 200 allows the fixing rod to pass through. When using the butterfly buckle to secure a formwork, the first end of the buckle body 100 is positioned toward the formwork, with the fixing portion 110 facing the steel pipe on the formwork surface. The fixing rod is then inserted into and exits the sleeve 200.

[0025] Multiple friction blocks 300 are evenly distributed around the circumference of the sleeve 200, and one end of the friction block 300 facing the center of the sleeve 200 can penetrate into the inner side of the sleeve 200; the adjustment assembly 400 is connected to the multiple friction blocks 300, and the adjustment assembly 400 can drive the friction blocks 300 to move along the radial direction of the sleeve 200 to a first position or a second position. In the first position, the multiple friction blocks 300 all penetrate into the inner side of the sleeve 200.

[0026] After the fixed rod passes through the sleeve 200, the friction block 300 moves toward the center of the sleeve 200 and contacts the surface of the fixed rod. Therefore, the adjustment assembly 400 is used to drive the friction block 300 radially inward of the sleeve 200, i.e., the friction block 300 is driven to the first position, where it comes into frictional contact with the surface of the fixed rod. Thus, the buckle body 100 and the fixed rod are secured together by the friction block 300.

[0027] It should be understood that the friction block 300 is driven by the adjustment assembly 400 to move to a first position or a second position. The first position is defined as when the friction block 300 penetrates the interior of the sleeve 200. Since the friction block 300 can only exist in the first position or the second position, when the friction block 300 is not in the first position, it is defined as being in the second position. It can be understood that when the friction block 300 has not penetrated the interior of the sleeve 200, the friction block 300 is in the second position.

[0028] When the butterfly buckle needs to be removed, the adjustment assembly 400 is used to move the friction block 300 to the second position, that is, the friction block 300 is away from the inner side of the sleeve 200, and the friction block 300 is no longer in friction contact with the surface of the fixed rod, and the buckle body 100 can be pulled out from the fixed rod.

[0029] It is understood that a specific embodiment is provided to achieve the installation connection between the friction block 300 and the sleeve 200. Specifically, the side wall of the sleeve 200 is provided with a plurality of guide grooves 210, which are distributed around the circumference of the sleeve 200 and penetrate the side wall of the sleeve 200. Each friction block 300 is disposed in a guide groove 210, and the friction block 300 slides in the guide groove 210.

[0030] The guide groove 210 guides and limits the movement path of the friction block 300, that is, the guide groove 210 limits the movement path of the friction block 300 to the radial direction of the sleeve 200. This enables the friction block 300 to move into the center of the sleeve 200 and contact the surface of the fixed rod inside the sleeve 200.

[0031] It is understood that an adjustment assembly 400 structure is provided to enable the adjustment assembly 400 to adjust the position of the friction block 300. Specifically, the side of the friction block 300 facing the center of the sleeve 200 is a friction surface 301, and the side of the friction block 300 away from the center of the sleeve 200 is a guide slope 302. From the first end to the second end, the guide slope 302 gradually moves away from the center of the sleeve 200. The adjustment assembly 400 includes a limit member 410 and a control member 420. The limit member 410 is mounted on the friction block 300 and contacts the guide slope 302. The control member 420 is connected to the limit member 410 to drive the limit member 410 to move axially along the sleeve 200.

[0032] When the control member 420 drives the limiting member 410 to move from the first end to the second end, the guiding inclined surface 302 gradually moves away from the center of the sleeve 200. Since the limiting member 410 is mounted on the friction block 300 and the size of the limiting member 410 is fixed, the limiting member 410 contacts the guiding inclined surface 302, forcing the friction block 300 into the inner side of the sleeve 200. It should be understood that the further the limiting member 410 moves from the first end to the second end, the further the friction block 300 penetrates into the inner side of the sleeve 200. In other words, the greater the contact force between the friction block 300 and the fixed rod surface, the greater the friction between the friction block 300 and the fixed rod, and the more secure the fixation.

[0033] When the control member 420 drives the limit member 410 to move from the second end to the first end, the limit member 410 no longer restricts the guide slope 302, so the friction block 300 can exit toward the second position, that is, the friction block 300 can move toward the outside of the sleeve 200, and the contact force between the friction block 300 and the surface of the fixed rod decreases. The friction force between the friction block 300 and the fixed rod will also decrease, and the buckle body 100 can be pulled out from the fixed rod.

[0034] It should be understood that when the control member 420 drives the limit member 410 to move from the first end toward the second end, the limit member 410 moves to the locked position, and when the control member 420 drives the limit member 410 to move from the second end toward the first end, the limit member 410 moves to the unlocked position.

[0035] Reference Figure 3As shown, it can be understood that the control member 420 includes a first rod portion 421 and a second rod portion 422, the first rod portion 421 and the second rod portion 422 intersect to form an angle, the intersection of the first rod portion 421 and the second rod portion 422 is hinged to the buckle body 100, the first rod portion 421 extends to the outside of the buckle body 100, the second rod portion 422 is movably connected to the limit member 410, and when the first rod portion 421 rotates around the hinge point to approach the buckle body 100, the second rod portion 422 is movably connected to the limit member 410. 22 drives the limiting member 410 to move toward the first end. When the first rod portion 421 rotates around the hinge point to move away from the buckle body 100, the second rod portion 422 drives the limiting member 410 to move toward the second end. The first rod portion 421 is provided with a card slot 423. When the first rod portion 421 is away from the buckle body 100, the card slot 423 is located on the outside of the buckle body 100. The card slot 423 is inserted with a card block 430, and the card block 430 is located between the first rod portion 421 and the buckle body 100.

[0036] The control member 420 is hinged on the buckle body 100, and rotating the control member 420 can realize that the control member 420 drives the limit member 410 to move. Since the limit member 410 is mounted on the friction block 300, the friction block 300 can also limit the moving direction of the limit member 410, that is, the limit member 410 moves along the axial direction of the sleeve 200. It should be understood that since the moving direction of the limit member 410 is a straight line, and the control member 420 is a rotational movement, a relative displacement perpendicular to the axial direction of the sleeve 200 will also occur between the control member 420 and the limit member 410, so a movable connection is required between the control member 420 and the limit member 410. Further, for example, a strip groove is provided on the control member 420, and the limit member 410 is provided with a connecting rod, and the connecting rod is inserted into the strip groove and slides, such as Figure 4 The structure shown.

[0037] The control member 420 includes a first rod portion 421 and a second rod portion 422. The first rod portion 421 and the second rod portion 422 intersect to form an angle, which can reduce the distance that the first rod portion 421 extends to the outside of the buckle body 100, so that the first rod portion 421 is closer to the buckle body 100, making it easier to manually operate the first rod portion 421 to rotate.

[0038] It should be understood that in the above structure, when the second rod portion 422 drives the limiting member 410 to move from the first end toward the second end, that is, the limiting member 410 moves to the locked position, at which time the first rod portion 421 rotates about the hinge point to move away from the buckle body 100. In addition, the locking slot 423 is located on the outside of the buckle body 100, and the locking block 430 can be inserted into the locking slot 423. The locking block 430 is located between the first rod portion 421 and the buckle body 100, preventing the first rod portion 421 from rotating closer to the buckle body 100. In other words, the cooperation between the locking block 430 and the locking slot 423 can maintain the limiting member 410 in the locked position.

[0039] It can be understood that the guide groove 210 is provided with a margin along the axial direction of the sleeve 200 , and the friction block 300 can move in the guide groove 210 along the axial direction of the sleeve 200 .

[0040] The friction block 300 moves axially within the guide groove 210 along the sleeve 200, meaning it can move from the first end toward the second end, or vice versa. When the buckle body 100 is threaded onto the fixed rod, the fixed rod moves from the first end toward the second end inside the sleeve 200. At this point, the friction block 300 may be pushed by the fixed rod, or it may move axially within the guide groove 210 from the first end toward the second end of the sleeve 200 until it is blocked by the guide groove 210 and cannot move further.

[0041] When the control member 420 drives the limiting member 410 to move from the first end toward the second end, that is, the limiting member 410 moves to the locked position, the limiting member 410 also pushes the friction block 300 to move along the axial direction of the sleeve 200 from the first end toward the second end until it is blocked by the guide groove 210 and cannot move further.

[0042] After the butterfly buckle is fixed to the fixed rod, if the load on the template increases, the butterfly buckle has a tendency to fall off the fixed rod, that is, the fixed rod has a tendency to move from the second end toward the first end relative to the buckle body 100. Since when the buckle body 100 is assembled, the friction block 300 moves from the first end toward the second end along the axial direction of the sleeve 200 until it is blocked by the guide groove 210, when the fixed pull rod moves from the second end toward the first end relative to the buckle body 100, it will drive the friction block 300 to move from the second end toward the first end along the axial direction of the sleeve 200. At this time, the limit member 410 is restricted by the control member 420 and remains relatively stationary with the buckle body 100, while relative movement will occur between the limit member 410 and the friction block 300, that is, the limit member 410 is displaced from the first end toward the second end relative to the friction block 300, that is, the limit member 410 will further push the friction block 300 toward the inner side of the sleeve 200 to increase the friction force between the friction block 300 and the fixed pull rod, thereby achieving an anti-slip effect.

[0043] It is understandable that a spring 440 is provided between the second rod portion 422 and the buckle body 100 , and the spring 440 is configured to drive the second rod portion 422 to rotate so as to keep the limiting member 410 having a tendency to move toward the second end.

[0044] When installing the butterfly buckle, the first rod 421 needs to be rotated toward the buckle body 100. At this time, the second rod 422 drives the stopper 410 from the second end toward the first end, and the friction block 300 does not block the fixed rod from passing through the sleeve 200. After the butterfly buckle has moved to the desired position, the first rod 421 needs to be rotated away from the buckle body 100. At this time, the second rod 422 drives the stopper 410 from the first end toward the second end. Therefore, the spring 440 is used to assist in driving the rotation of the second rod 422, maintaining the tendency of the stopper 410 to move toward the second end. In actual operation, press the first rod portion 421 close to the buckle body 100, and after the buckle body 100 passes through the fixed pull rod, release the force acting on the first rod portion 421, and the spring 440 can drive the second rod portion 422 to move toward the second end, so that the limit member 410 pushes the friction block 300 to move toward the inner side of the sleeve 200, completing the contact between the friction block 300 and the fixed pull rod.

[0045] It is understandable that flanges 310 are provided on both sides of the guiding inclined surface 302 of the friction block 300 . The flanges 310 can abut against the outer surface of the sleeve 200 to prevent the guiding inclined surface 302 from extending into the inner side of the sleeve 200 .

[0046] In some embodiments, the friction block 300 can be designed to be longer in the radial direction of the sleeve 200. Even if the friction block 300 is inserted into the sleeve 200, a portion of the friction block 300 will still be outside the sleeve 200, preventing the friction block 300 from falling into the sleeve 200. In other embodiments, if the friction block 300 can be designed to be longer in the radial direction of the sleeve 200, the stopper 410 also needs to be larger in size to fit over the friction block 300. Therefore, the size of the friction block 300 can be shortened. At the same time, flanges 310 are provided on both sides of the guide slope 302 of the friction block 300. The flanges 310 abut against the outer surface of the sleeve 200 to prevent the friction block 300 from falling into the sleeve 200.

[0047] It can be understood that the roughness of the friction surface 301 is greater than the roughness of the guide inclined surface 302 .

[0048] Since the guide bevel 302 of the friction block 300 needs to generate relative displacement with the limiter 410 in order to control the movement of the friction block 300 toward the inner side of the sleeve 200, in order to reduce the external force required to move the limiter 410, the roughness of the guide bevel 302 can be reduced to be less than the roughness of the friction surface 301. It should be understood that the friction block 300 can be composed of components made of two different materials to form guide bevels 302 and friction surfaces 301 with different roughness. Alternatively, the friction surface 301 and the guide bevel 302 can be made of the same material, but wavy patterns are provided on the friction surface 301 to increase the roughness of the friction surface 301, thereby ultimately increasing the friction between the friction block 300 and the fixed rod.

[0049] It is understandable that a chamfer is provided on one side of the friction block 300 facing the first end, and the chamfer is located on one side of the friction surface 301 .

[0050] Because the stopper 410 drives the friction block 300 by contacting the guide bevel 302, it easily drives the friction block 300 toward the inside of the sleeve 200. Conversely, the stopper 410 cannot drive the friction block 300 away from the inside of the sleeve 200 and out. When the fixed rod is inserted into the sleeve 200, it is possible that part of the friction block 300 has already penetrated the inside of the sleeve 200, blocking the fixed rod from exiting. A chamfer is provided on the side of the friction block 300 facing the first end. When the fixed rod enters the sleeve 200 and exits from the first end toward the second end, the fixed rod contacts the chamfer, squeezing the friction block 300 out of the sleeve 200. After the buckle body 100 is moved to the predetermined position, the stopper 410 is moved again to push the friction block 300 into contact with the fixed rod, completing the installation of the butterfly buckle.

[0051] It can be understood that the fixing portion 110 includes two arc-shaped slots 111 , and the two arc-shaped slots 111 are symmetrically arranged on the buckle body 100 with the central axis of the sleeve 200 as the symmetry axis.

[0052] The arc-shaped slot 111 can be adapted to the steel pipe on the surface of the template, thereby increasing the contact area between the buckle body 100 and the steel pipe, and can better fix the steel pipe on the surface of the template, thereby supporting and reinforcing the template.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A butterfly buckle, characterized in that: include: A buckle body (100), the buckle body (100) having a first end and a second end that are relatively distributed, the first end being provided with a fixing portion (110); a sleeve (200), the sleeve (200) passing through the buckle body (100), and the sleeve (200) is arranged along the first end toward the second end; a plurality of friction blocks (300), wherein the plurality of friction blocks (300) are evenly distributed around the circumference of the sleeve (200), and one end of the friction block (300) facing the center of the sleeve (200) is capable of penetrating into the inner side of the sleeve (200); An adjusting component (400) is connected to the plurality of friction blocks (300), and the adjusting component (400) is capable of driving the friction blocks (300) to move radially along the sleeve (200) to a first position or a second position. In the first position, the plurality of friction blocks (300) all penetrate into the inner side of the sleeve (200).

2. The butterfly buckle according to claim 1, characterized in that: The side wall of the sleeve (200) is provided with a plurality of guide grooves (210), the plurality of guide grooves (210) are distributed around the circumference of the sleeve (200), the guide grooves (210) penetrate the side wall of the sleeve (200), each of the friction blocks (300) is arranged in one of the guide grooves (210), and the friction block (300) slides in the guide groove (210).

3. The butterfly buckle according to claim 2, characterized in that: The side of the friction block (300) facing the center of the sleeve (200) is a friction surface (301), and the side of the friction block (300) away from the center of the sleeve (200) is a guide slope (302). Along the direction from the first end to the second end, the guide slope (302) gradually moves away from the center of the sleeve (200). The adjustment component (400) includes a limiter (410) and a control component (420). The limiter (410) is sleeved on the friction block (300) and contacts the guide slope (302). The control component (420) is connected to the limiter (410) to drive the limiter (410) to move along the axial direction of the sleeve (200).

4. The butterfly buckle according to claim 3, characterized in that: The control member (420) includes a first rod portion (421) and a second rod portion (422), the first rod portion (421) and the second rod portion (422) intersect to form an angle, the intersection of the first rod portion (421) and the second rod portion (422) is hinged to the buckle body (100), the first rod portion (421) extends to the outside of the buckle body (100), the second rod portion (422) is movably connected to the limiting member (410), and when the first rod portion (421) rotates around the hinge point to approach the buckle body (100), the second rod portion (422) drives the limiting member (410) moves toward the first end, and when the first rod portion (421) rotates around the hinge point to move away from the buckle body (100), the second rod portion (422) drives the limiting member (410) to move toward the second end, and the first rod portion (421) is provided with a slot (423), and when the first rod portion (421) is away from the buckle body (100), the slot (423) is located outside the buckle body (100), and a block (430) is inserted into the slot (423), and the block (430) is located between the first rod portion (421) and the buckle body (100).

5. The butterfly buckle according to claim 4, characterized in that: The guide groove (210) is provided with a margin along the axial direction of the sleeve (200), and the friction block (300) is capable of moving in the guide groove (210) along the axial direction of the sleeve (200).

6. The butterfly buckle according to claim 4, characterized in that: A spring (440) is provided between the second rod portion (422) and the buckle body (100), and the spring (440) is configured to drive the second rod portion (422) to rotate so as to maintain the limiting member (410) having a tendency to move toward the second end.

7. The butterfly buckle according to claim 6, characterized in that: Flanges (310) are provided on both sides of the guide bevel (302) of the friction block (300), and the flanges (310) can abut against the outer surface of the sleeve (200) to prevent the guide bevel (302) from extending into the inner side of the sleeve (200).

8. The butterfly buckle according to claim 3, characterized in that: The roughness of the friction surface (301) is greater than the roughness of the guide inclined surface (302).

9. The butterfly buckle according to claim 3, characterized in that: A chamfer is provided on one side of the friction block (300) facing the first end, and the chamfer is located on one side of the friction surface (301).

10. The butterfly buckle according to claim 1, characterized in that: The fixing portion (110) comprises two arc-shaped slots (111), and the two arc-shaped slots (111) are symmetrically arranged on the buckle body (100) with the central axis of the sleeve (200) as a symmetry axis.

Images