Fastener

Abstract

The invention provides a buckle. The fastener comprises a first fastener which is provided with a body and a first through hole, and the first through hole is formed in the body in a penetrating mode. The second fastener is matched with the first fastener and is provided with a seat body, an extension body and a second through hole, the extension body is formed by extending outwards from the seat body, and the second through hole is formed in the seat body in a penetrating mode; the third fastener is arranged in the second fastener and is provided with a base part; wherein the body, the seat body, the extension body and the base part respectively form a first rope penetrating channel and a second rope penetrating channel, so that a rope body can penetrate through the first rope penetrating channel and the second rope penetrating channel respectively.

Description

Technical Field

[0001] The present disclosure relates to a buckle, and more particularly to a buckle capable of bidirectionally releasing a rope body. Background Art

[0002] Existing rope buckles such as those disclosed in CN217390120U are mostly of a two-piece structure. For example, they include a male buckle and a female buckle that are assembled with each other. Among them, the male buckle and the female buckle can clamp and fix the rope by the resilience of the elastic section.

[0003] However, the total length of this two-piece structure is relatively long, and the product feasibility is relatively low. In addition, in order to be able to clamp and fix the rope, a biting section is additionally provided at the end of the elastic section of this two-piece structure. This causes a certain width to still exist between the ropes when the ropes are fixed by the biting section and extend out from the second opening, making the ropes unable to be arranged adjacent to each other, and the aesthetics is not good. Summary of the Invention

[0004] The purpose of the present invention is to provide a buckle to solve at least one of the above problems.

[0005] The present disclosure provides a buckle, including: a first fastener, including a body, a first accommodating space, and a first through hole. The first accommodating space is formed inside the body, and the first through hole is formed through the body and communicates with the first accommodating space; a second fastener, which is assembled with the first fastener and includes a seat body, an extension body, a second accommodating space, and a second through hole. The seat body is located on one side of the body and away from the first through hole. The extension body extends outward from the seat body. The second accommodating space is defined by surrounding the seat body and the extension body. The second through hole is formed through the seat body and communicates with the second accommodating space; and a third fastener, which is disposed in the second accommodating space and includes a base. Wherein, the body, the seat body, the extension body, and the base respectively form a first rope threading channel and a second rope threading channel. The first rope threading channel and the second rope threading channel respectively allow a rope body to pass through the second through hole to the first through hole. There is a first width between the first rope threading channel and the second rope threading channel at the first through hole, and there is a second width between the first rope threading channel and the second rope threading channel at the second through hole, and the second width is greater than the first width.

[0006] In the buckle as described above, an elastic member disposed in the second accommodating space is further included. A blind hole is recessed in the bottom surface of the base. One end of the elastic member abuts against the extension body, and the other end of the elastic body is accommodated in the blind hole.

[0007] In the buckle as described above, the buckle can be transformed between a first release state, a second release state, and a locked state. When in the first release state and the second release state, the extension body and the base compress the elastic member together and move the base away from the seat body, whereby the rope body can move in the first rope threading channel and the second rope threading channel. When in the locked state, the base is adjacent to the seat body, and the rope body is jointly clamped by the base and the seat body and cannot move in the first rope threading channel and the second rope threading channel.

[0008] In the buckle as described above, the extension body has four extension columns, a connecting portion, and a positioning column. The extension columns extend outward from the seat body and are spaced apart from each other. The connecting portion is connected to the ends of the extension columns. The positioning column extends outward from the connecting portion and faces the second through hole. One end of the elastic member is sleeved on the positioning column and abuts against the connecting portion.

[0009] In the buckle as described above, the first fastener further includes two snap blocks, which protrude from the body and face the first accommodating space. The third fastener further includes two guiding columns, two snap portions, and two lug portions. The guiding columns extend outward from the bottom surface of the base and are spaced apart from each other, and are respectively located on opposite sides of the connecting portion. The snap portions extend outward from the sides of the guiding columns respectively. The lug portions extend outward from the opposite two side surfaces of the base respectively.

[0010] In the buckle as described above, the body has two abutting surfaces, and the seat body has two contact surfaces, and the abutting surfaces respectively correspond to the contact surfaces.

[0011] In the buckle as described above, the connecting portion has two opposite inclined surfaces, and the body has two opposite guiding surfaces, and the inclined surfaces respectively correspond to the guiding surfaces.

[0012] In the buckle as described above, the third fastener further includes two guiding convex portions, which are respectively formed on the other two opposite side surfaces of the base. The seat body further has two opposite guiding arc surfaces, and the guiding convex portions respectively correspond to the guiding arc surfaces.

[0013] In the buckle as described above, when the buckle is transformed from the locked state to the second release state, the first fastener moves in the first direction, and the snap blocks respectively contact the snap portions to simultaneously pull the third fastener. At this time, the abutting surfaces respectively disengage from the contact surfaces, the lug portions disengage from the seat body, the inclined surfaces respectively move away from the guiding surfaces, the blind hole and the connecting portion jointly compress the elastic member, and the guiding convex portions respectively move away from the guiding arc surfaces.

[0014] In the buckle as described above, when the buckle changes from the second release state to the locking state, the first fastener moves in the second direction, and at the same time the elastic member rebounds, whereby the guiding convex portions respectively approach the guiding arc surfaces and the inclined surfaces respectively approach the guiding surfaces until the abutting surfaces respectively contact the contact surfaces and the convex ear portions contact the seat body.

[0015] In the buckle as described above, when the buckle changes from the locking state to the first release state, the first fastener moves in the second direction, the snap blocks respectively disengage from the snap portions, the convex ear portions disengage from the seat body, and the first fastener contacts the contact surfaces with the abutting surfaces respectively and simultaneously pushes the second fastener. At this time, the blind hole and the connecting portion jointly compress the elastic member, and the guiding convex portions respectively move away from the guiding arc surfaces.

[0016] In the buckle as described above, when the buckle changes from the first release state to the locking state, the first fastener moves in the first direction, and at the same time the elastic member rebounds, whereby the guiding convex portions respectively approach the guiding arc surfaces until the snap blocks respectively contact the snap portions and the convex ear portions contact the seat body.

[0017] In the buckle as described above, the first rope-passing channel and the second rope-passing channel are respectively constituted by the space surrounded and defined by the guiding convex portions and the guiding arc surfaces and the space surrounded and defined by the inclined surfaces and the guiding surfaces.

[0018] In the buckle as described above, the connecting portion has an H-shaped cross section.

[0019] In the buckle as described above, the elastic member is a compression spring.

[0020] In the buckle as described above, the body has a hollow and tapered structure.

[0021] The present disclosure provides another buckle, including: a first fastener, including a body, a receiving space, an extension body, a first through hole and a second through hole, the receiving space is formed inside the body, the first through hole is formed through one end of the body and communicates with the receiving space, the second through hole is formed through the other end of the body and communicates with the receiving space, and the extension body extends outward from the body and is located in the receiving space; and a second fastener, disposed in the receiving space and including a base; wherein, the body, the extension body and the base respectively constitute a first rope-passing channel and a second rope-passing channel, the first rope-passing channel and the second rope-passing channel respectively allow a rope to pass through the second through hole to the first through hole, there is a first width between the first rope-passing channel and the second rope-passing channel at the first through hole, there is a second width between the first rope-passing channel and the second rope-passing channel at the second through hole, and the second width is greater than the first width.

[0022] In the buckle as described above, an elastic member is further included and disposed in the accommodating space. A blind hole is recessed in the bottom surface of the base. One end of the elastic member abuts against the extension body, and the other end of the elastic body is received in the blind hole.

[0023] In the buckle as described above, the buckle can be transformed between a release state and a locking state. When in the release state, the extension body and the base jointly compress the elastic member, and the base moves away from the second through hole, whereby the rope body can move in the first rope threading channel and the second rope threading channel. When in the locking state, the base is adjacent to the second through hole, and the rope body is jointly clamped by the base and the body and cannot move in the first rope threading channel and the second rope threading channel.

[0024] In the buckle as described above, the extension body has four extension columns, a connecting portion, and a positioning column. The extension columns extend outward from the body and are spaced apart from each other, and are correspondingly located in the accommodating space. The connecting portion is connected to the ends of the extension columns. The positioning column extends outward from the connecting portion and faces the second through hole. One end of the elastic member is sleeved on the positioning column and abuts against the connecting portion.

[0025] In the buckle as described above, the first fastener further includes two snap blocks and a stepped section. The snap blocks protrude from the body and face the accommodating space. The stepped section is formed on the body and is adjacent to the second through hole and is spaced apart from the snap blocks. The second fastener further includes two guiding columns, two snap portions, and two lug portions. The guiding columns respectively extend outward from the bottom surface of the base and are spaced apart from each other, and are respectively located on opposite sides of the connecting portion. The snap portions respectively extend outward from the sides of the guiding columns. The lug portions respectively extend outward from the opposite two side surfaces of the base.

[0026] In the buckle as described above, the connecting portion has two opposite inclined surfaces, and the body has two opposite guiding surfaces. The inclined surfaces respectively correspond to the guiding surfaces.

[0027] In the buckle as described above, the second fastener further includes two guiding protrusions, which are respectively formed on the other two opposite side surfaces of the base. The body further has two opposite guiding arc surfaces. The guiding protrusions respectively correspond to the guiding arc surfaces.

[0028] In the buckle as described above, when the buckle is transformed from the locking state to the release state, the snap blocks respectively disengage from the snap portions, the lug portions disengage from the stepped section, the inclined surfaces respectively move away from the guiding surfaces, the blind hole and the connecting portion jointly compress the elastic member, and the guiding protrusions respectively move away from the guiding arc surfaces.

[0029] In the buckle as described above, when the buckle changes from the release state to the locking state, the elastic member rebounds, thereby bringing the guiding convex portions adjacent to the guiding arc surfaces respectively until the buckle blocks contact the buckle portions respectively and the convex ear portions contact the stepped section.

[0030] In the buckle as described above, the first rope threading channel and the second rope threading channel are respectively constituted by the space defined by the guiding convex portion and the guiding arc surface and the space defined by the inclined surface and the guiding surface.

[0031] The present disclosure further provides a buckle, including: a first fastener, including a body, a first accommodating space, a first through hole and a positioning portion, the first accommodating space is formed inside the body, the first through hole is formed through the body and communicates with the first accommodating space; and a second fastener, which is assembled with the first fastener and includes a seat body, an extension body, a second accommodating space and a second through hole, the seat body is located on one side of the body and away from the first through hole, the extension body extends outward from the seat body, the second accommodating space is defined by the seat body and the extension body, the second through hole is formed through the seat body and communicates with the second accommodating space; wherein, the positioning portion is correspondingly located in the second through hole, the body, the seat body, the extension body and the base portion respectively constitute a first rope threading channel and a second rope threading channel, the first rope threading channel and the second rope threading channel respectively allow a rope body to pass through the second through hole to the first through hole, there is a first width between the first rope threading channel and the second rope threading channel at the first through hole, there is a second width between the first rope threading channel and the second rope threading channel at the second through hole, and the second width is greater than the first width.

[0032] In the buckle as described above, it further includes an elastic member disposed in the second accommodating space, a blind hole is recessed in the bottom surface of the positioning portion, one end of the elastic member abuts against the extension body, and the other end of the elastic body is accommodated in the blind hole.

[0033] In the buckle as described above, the buckle can be changed between a release state and a locking state. When in the release state, the extension body and the positioning portion jointly compress the elastic member and move the positioning portion away from the seat body, whereby the rope body can move in the first rope threading channel and the second rope threading channel. When in the locking state, the positioning portion is adjacent to the seat body, and the rope body is jointly clamped by the positioning portion and the seat body and cannot move in the first rope threading channel and the second rope threading channel.

[0034] In the buckle as described above, the extension body has four extension columns, a connecting portion and a positioning column. The extension columns extend outward from the seat body and are spaced apart from each other. The connecting portion is connected to the ends of the extension columns. The positioning column extends outward from the connecting portion and faces the second through hole. One end of the elastic member is sleeved on the positioning column and abuts against the connecting portion.

[0035] In the buckle as described above, the first fastener further includes two guiding columns and two lug portions. The guiding columns protrude from the body and are located in the first accommodating space, and are respectively located on opposite sides of the connecting portion and are fixedly connected to the positioning portion. The lug portions extend outward from opposite two side surfaces of the positioning portion respectively.

[0036] In the buckle as described above, the body has two abutting surfaces, and the seat body has two contact surfaces, and the abutting surfaces respectively correspond to the contact surfaces.

[0037] In the buckle as described above, the connecting portion has two opposite inclined surfaces, and the body has two opposite guiding surfaces, and the inclined surfaces respectively correspond to the guiding surfaces.

[0038] In the buckle as described above, the first fastener further includes two guiding convex portions, which are respectively formed on the other two opposite side surfaces of the positioning portion. The seat body further has two opposite guiding arc surfaces, and the guiding convex portions respectively correspond to the guiding arc surfaces.

[0039] In the buckle as described above, when the buckle changes from the locked state to the released state, the abutting surfaces respectively disengage from the contact surfaces, the lug portions disengage from the seat body, the inclined surfaces respectively move away from the guiding surfaces, the blind hole and the connecting portion jointly compress the elastic member, and the guiding convex portions respectively move away from the guiding arc surfaces.

[0040] In the buckle as described above, when the buckle changes from the released state to the locked state, the elastic member rebounds, thereby making the guiding convex portions respectively adjacent to the guiding arc surfaces and making the inclined surfaces respectively adjacent to the guiding surfaces until the abutting surfaces respectively contact the contact surfaces and the lug portions contact the seat body.

[0041] In the buckle as described above, the first rope passing channel and the second rope passing channel are respectively constituted by the space surrounded and defined by the guiding convex portions and the guiding arc surfaces and the space surrounded and defined by the inclined surfaces and the guiding surfaces.

[0042] In summary, in the buckle of the present disclosure, since the width of the rope body at the outlet is smaller than that at the inlet, the rope bodies can be made to be adjacent and parallel to each other after passing through, effectively improving the aesthetics. In addition, the present disclosure changes the way the second fastener and the third fastener are respectively assembled with the first fastener, so that the elastic member can be accommodated between the second fastener and the third fastener, resulting in a shorter overall length of the buckle of the present disclosure, thus having the advantage of high product versatility. Furthermore, the buckle of the present disclosure can release the rope body bidirectionally and can automatically return to the state of locking the rope body, with high practicality and good operation experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is an overall schematic diagram of the first embodiment of the buckle of the present disclosure.

[0044] Figure 2 Exploded view of the first embodiment of the fastener of the present disclosure.

[0045] Figure 3 Schematic diagram of a perspective view of the first fastener in the first embodiment of the fastener of the present disclosure.

[0046] Figure 4 Schematic diagram of the bottom perspective view of the second fastener in the first embodiment of the fastener of the present disclosure.

[0047] Figure 5 is Figure 1 Schematic diagram along the A-A section.

[0048] Figure 6 and Figure 7 Schematic diagrams of different sections of the first embodiment of the fastener of the present disclosure in the locked state.

[0049] Figure 8 and Figure 9 Schematic diagrams of different sections of the first embodiment of the fastener of the present disclosure in the first release state.

[0050] Figure 10 and Figure 11 Schematic diagrams of different sections of the first embodiment of the fastener of the present disclosure in the second release state.

[0051] Figure 12 Schematic diagram of the application of the first embodiment of the fastener of the present disclosure.

[0052] Figure 13 Exploded view of the second embodiment of the fastener of the present disclosure.

[0053] Figure 14 , Figure 15 and Figure 16 Schematic diagrams of different sections of the second embodiment of the fastener of the present disclosure.

[0054] Figure 17 Exploded view of the third embodiment of the fastener of the present disclosure.

[0055] Figure 18 and Figure 19 Schematic diagrams of different sections of the third embodiment of the fastener of the present disclosure.

[0056] The reference numerals are as follows:

[0057] 100, 100’, 100” fasteners

[0058] 1, 1’, 1” first fasteners

[0059] 11, 11’, 11” bodies

[0060] 111,111” abutting surface

[0061] 112,112’,112” guiding surface

[0062] 12,12” first accommodating space

[0063] 13,13’,13” first through hole

[0064] 14,15’,23’ snap block

[0065] 15,15” rib

[0066] 111’ arc guiding surface

[0067] 12’ extension body

[0068] 121’ extension column

[0069] 122’ connecting part

[0070] 1221’ inclined surface

[0071] 123’ positioning column

[0072] 14’,24 second through hole

[0073] 16’ accommodating space

[0074] 17’ stepped section

[0075] 16” positioning part

[0076] 161”,211’,311 blind hole

[0077] 17”,22’,32 guiding column

[0078] 18”,24’,34 convex ear part

[0079] 19”,25’,35 guiding convex part

[0080] 2,2’ second fastener

[0081] 21 seat body

[0082] 211 contact surface

[0083] 212 arc guiding surface

[0084] 22 extension body

[0085] 221 extension column

[0086] 222 connecting part

[0087] 2221 inclined surface

[0088] 223 positioning column

[0089] 23 Second accommodation space

[0090] 21’, 31 Base

[0091] 3 Third fastener

[0092] 33 Buckling part

[0093] 4 Elastic member

[0094] 5 First rope threading channel

[0095] 6 Second rope threading channel

[0096] 7, 8 Rope body

[0097] 9 Shoe

[0098] 91 Tongue

[0099] F1 First external force

[0100] F2 Second external force

[0101] W1 First width

[0102] W2 Second width

[0103] X1 First direction

[0104] X2 Second direction Specific embodiments

[0105] Please refer to Figure 1 and Figure 2 In the first embodiment, the buckle 100 of the present disclosure includes a first fastener 1, a second fastener 2, a third fastener 3 and an elastic member 4. The first fastener 1 and the second fastener 2 can be assembled with each other. The third fastener 3 is disposed inside the second fastener 2, and the elastic member 4 is disposed between the second fastener 2 and the third fastener 3. The structures of each component and the connection relationships therebetween will be described in detail below.

[0106] Please also refer to Figure 3, the first fastener 1 includes a body 11, a first accommodation space 12, a first through hole 13, and two snap blocks 14. The body 11 is generally in a hollow and tapered structure, for example, its cross-section is generally a trapezoidal hollow cone. One side of the body 11 (for example, corresponding to the longer base of the trapezoidal cross-section) has two abutting surfaces 111 spaced apart from each other, and the inner side of the body 11 has two opposite guiding surfaces 112. The first accommodation space 12 is formed inside the body 11. The first through hole 13 is formed through the other side of the body 11 (for example, corresponding to the shorter base of the trapezoidal cross-section, that is, away from the two abutting surfaces 111), and communicates with the first accommodation space 12. The two snap blocks 14 are respectively protruded on the inner side of the body 11 and face the first accommodation space 12, and are respectively located between the two guiding surfaces 112. In addition, the body 11 has a plurality of ribs 15 on the opposite outer sides corresponding to the two snap blocks 14, which can provide frictional force when the user operates the body 11.

[0107] Please also refer to Figure 4 , the second fastener 2 includes a base 21, an extension 22, a second accommodation space 23, and a second through hole 24. The base 21 is generally in a hollow square plate shape, located on one side of the body 11 and away from the first through hole 13 (that is, adjacent to the two abutting surfaces 111). The top of the base 21 has two contact surfaces 211 corresponding to the two abutting surfaces 111, and the two contact surfaces 211 are spaced apart from each other. The inner side of the base 21 also has two opposite arc guiding surfaces 212. The extension 22 is accommodated in the first accommodation space 12, and has four extension columns 221, a connecting portion 222, and a positioning column 223. The four extension columns 221 extend outward from the top of the base 21 and are spaced apart from each other. The connecting portion 222 is connected to the ends of the four extension columns 221 and has an H-shaped cross-section. The connecting portion 222 has two inclined surfaces 2221, and the two inclined surfaces 2221 respectively correspond to the two guiding surfaces 112. The positioning column 223 extends outward from the connecting portion 222 and faces the second through hole 24. Thus, the positioning column 223 and the connecting portion 222 together have a generally arrow-shaped cross-section (as Figure 5 ). The second accommodation space 23 is defined by surrounding the base 21 and the extension 22. The second through hole 24 is formed through the base 21 and communicates with the second accommodation space 23.

[0108] The third fastener 3 is disposed in the second accommodating space 23 and includes a base 31, two guiding columns 32, two buckling portions 33, two lug portions 34 and two guiding convex portions 35. A circular blind hole 311 is recessed in the bottom surface of the base 31, and the size of the base 31 is smaller than that of the second through hole 24 so that it can pass through the second through hole 24. The two guiding columns 32 respectively extend outward from the bottom surface of the base 31 and are spaced apart from each other, and are respectively located on opposite sides of the connecting portion 222. The two buckling portions 33 respectively extend outward from the side surfaces of the two guiding columns 32. The two lug portions 34 respectively extend outward from opposite side surfaces of the base 31. The two guiding convex portions 35 are respectively formed on the other opposite side surfaces of the base 31 and respectively correspond to the two guiding arc surfaces 212.

[0109] The elastic member 4 is disposed in the second accommodating space 23. One end of the elastic member 4 is sleeved on the positioning column 223 and abuts against the connecting portion 222, and the other end is received in the blind hole 311. In this embodiment, the elastic member 4 is a compression spring.

[0110] The actuation of the fastener 100 of the present disclosure will be described below. The fastener 100 can be in a locked state ( Figure 6 and Figure 7 ), a first release state ( Figure 8 and Figure 9 ), and a second release state ( Figure 10 and Figure 11 ) and can be penetrated by the ropes 7 and 8. Among them, Figure 6 , Figure 8 and Figure 10 are schematically sectional views of different states formed with reference to the position of the A-A section line as shown in Figure 1 , while Figure 7 , Figure 9 and Figure 11 are schematically sectional views of different states formed with reference to the position of the B-B section line as shown in Figure 1 .

[0111] Please refer to Figure 5 , Figure 6 and Figure 7 . In the locked state, due to the elastic force provided by the elastic member 4 to the connecting portion 222 and the base 31, the two lug portions 34 can respectively abut against the contact surface 211 of the seat body 21, so that the second fastener 2 and the third fastener 3 will not be separated from each other, and the base 31 can be correspondingly located in the second through hole 24 and adjacent to the seat body 21. In addition, the two snap blocks 14 are respectively buckled to the two buckling portions 33, so that the first fastener 1 and the third fastener 3 will not be separated from each other. As shown in Figure 5As shown, at this time, the spaces defined by the two guiding protrusions 35 and the two guiding arc surfaces 212 and the spaces defined by the two inclined surfaces 2221 and the two guiding surfaces 112 can respectively form a first rope threading channel 5 and a second rope threading channel 6. The first rope threading channel 5 is for the rope body 7 to pass through, and the second rope threading channel 6 is for the rope body 8 to pass through. The rope bodies 7 and 8 are respectively clamped by the two guiding protrusions 35 of the base 31 and the two guiding arc surfaces 212 of the seat body 21, and thus cannot move in the first rope threading channel 5 and the second rope threading channel 6. If it is desired to enhance the fixing effect of the rope bodies 7 and 8, the rope bodies 7 and 8 exposed outside the second through hole 24 can be bent, but the present disclosure is not limited thereto.

[0112] In an embodiment, the rope bodies 7 and 8 can be three-strand cotton ropes, braided cotton ropes or woven tapes, but are not limited thereto.

[0113] Please refer to Figure 8 and Figure 9 When the buckle 100 changes from the locked state to the first release state, a first external force F1 is applied to the first fastener 1, causing the first fastener 1 to move along the second direction X2, and the two abutting surfaces 111 respectively contact the two contact surfaces 211 to simultaneously push the second fastener 2 to move along the second direction X2. The two snap blocks 14 are respectively disengaged from the two snap portions 33, and the two lug portions 34 are disengaged from the two contact surfaces 211 of the seat body 21 (at this time, the two snap blocks 14 can serve as the stop points for the two lug portions 34). The blind hole 311 and the connecting portion 222 jointly compress the elastic member 4, and the two guiding protrusions 35 respectively move away from the two guiding arc surfaces 212. That is to say, the base 31 moves away from the seat body 21 and is not correspondingly located in the second through hole 24, so that the space defined by the two guiding protrusions 35 and the two guiding arc surfaces 212 becomes larger and does not clamp the rope bodies 7 and 8. Thereby, the rope bodies 7 and 8 can move in the first rope threading channel 5 and the second rope threading channel 6.

[0114] When the first external force F1 is removed, due to the resilience of the elastic member 4, the first fastener 1 moves in the first direction X1, and the second fastener 2 also moves in the first direction X1. The base 31 approaches the seat body 21, that is, the two guiding protrusions 35 respectively approach the two guiding arc surfaces 212 until the two snap blocks 14 respectively contact the two snap portions 33 and the two lug portions 34 respectively contact the two contact surfaces 211 of the seat body 21. At this time, the buckle 100 changes from the first release state to the locked state. Since the space defined by the two guiding protrusions 35 and the two guiding arc surfaces 212 becomes smaller and can clamp the rope bodies 7 and 8, thereby the rope bodies 7 and 8 cannot move in the first rope threading channel 5 and the second rope threading channel 6.

[0115] Please refer to Figure 10 and Figure 11, when the buckle 100 changes from the locked state to the second release state, a second external force F2 is applied to the first fastener 1, causing the first fastener 1 to move along the first direction X1, and the two buckle blocks 14 respectively contact the two buckle portions 33 and simultaneously pull the third fastener 3 to move along the first direction X1. At this time, the two abutting surfaces 111 are respectively separated from the two contact surfaces 211, the two lug portions 34 are separated from the two contact surfaces 211 of the seat body 21, the two inclined surfaces 2221 are respectively away from the two guiding surfaces 112, the blind hole 311 and the connecting portion 222 jointly compress the elastic member 4, and the two guiding protrusions 35 are respectively away from the two guiding arc surfaces 212. That is to say, the base portion 31 is away from the seat body 21 and is not correspondingly located in the second through hole 24, so that the space defined by the two guiding protrusions 35 and the two guiding arc surfaces 212 becomes larger and does not clamp the ropes 7 and 8. In addition, since the two inclined surfaces 2221 are also respectively away from the two guiding surfaces 112, the space defined by the two inclined surfaces 2221 and the two guiding surfaces 112 becomes larger. Therefore, the ropes 7 and 8 can move in the first rope threading channel 5 and the second rope threading channel 6. In this embodiment, in the second release state, since the two inclined surfaces 2221 are also respectively away from the two guiding surfaces 112, compared with the first release state, the frictional force exerted on the ropes 7 and 8 by the two inclined surfaces 2221 and the two guiding surfaces 112 in the second release state is smaller, and the ropes 7 and 8 will be able to move more easily. That is to say, the space of the first rope threading channel 5 and the second rope threading channel 6 in the second release state is larger than that in the first release state. Therefore, the clamping force on the ropes 7 and 8 in the second release state is smaller than that in the first release state.

[0116] When the second external force F2 is removed, the first fastener 1 can move in the second direction X2 and the third fastener 3 can also move in the second direction X2 by the rebound of the elastic member 4. The base portion 31 is adjacent to the seat body 21, that is, the two guiding protrusions 35 are respectively adjacent to the two guiding arc surfaces 212, and at the same time the two inclined surfaces 2221 are also respectively adjacent to the two guiding surfaces 112 until the two abutting surfaces 111 respectively contact the two contact surfaces 211 and the two lug portions 34 respectively contact the two contact surfaces 211 of the seat body 21. At this time, the buckle 100 will change from the second release state to the locked state. Since the space defined by the two guiding protrusions 35 and the two guiding arc surfaces 212 becomes smaller, the ropes 7 and 8 can be clamped, and thereby the ropes 7 and 8 cannot move in the first rope threading channel 5 and the second rope threading channel 6.

[0117] As Figure 12As shown in the figure, the buckle 100 of the present disclosure can be disposed on a shoe 9 and is for the cord bodies 7 and 8 disposed on the shoe 9 to pass through. The cord bodies 7 and 8 pass through the buckle 100 in the following manner. The buckle 100 is changed to the second release state. At this time, the first cord-passing channel 5 and the second cord-passing channel 6 are at the maximum, facilitating the passing through of the cord bodies 7 and 8. At this time, the cord bodies 7 and 8 can respectively pass through the second through-hole 24, pass through the space between the guiding convex portion 35 and the guiding arc surface 212, and pass out through the gap between the two extending columns 221 and the main body 11. Then, the cord bodies 7 and 8 pass through the gap between the two extending columns 221 and the main body 11 again, pass through the space between the two inclined surfaces 2221 and the two guiding surfaces 112, and finally pass out through the first through-hole 13. Pull the cord bodies 7 and 8 to retract the cord bodies 7 and 8 exposed from the gap between the two extending columns 221 and the main body 11, and thus complete the threading operation. As Figure 6 As shown in the figure, there is a first width W1 between the first cord-passing channel 5 and the second cord-passing channel 6 at the first through-hole 13, and there is a second width W2 between the first cord-passing channel 5 and the second cord-passing channel 6 at the second through-hole 24. Since the first fastener 1 is a hollow and tapered structure, the second width W2 is greater than the first width W1. This can make the cord bodies 7 and 8 parallel to each other after passing out through the first through-hole 13, effectively improving the aesthetics.

[0118] In addition, in this embodiment, the first direction X1 can be the direction in which the buckle 100 is away from the tongue 91 of the shoe 9, and the second direction X2 can be the direction in which the buckle 100 moves toward the tongue 91 of the shoe 9. In other words, the user can change the buckle 100 from the locked state to the first release state, and make the buckle 100 move toward the tongue 91 direction, and the user can change the buckle 100 from the locked state to the second release state, and make the buckle 100 away from the tongue 91, thereby adjusting the position of the buckle 100 on the shoe 9 to determine the tightness. However, the present disclosure is not limited to the above. The buckle 100 of the present disclosure can also be applied to the cord on the opening periphery of clothes.

[0119] To sum up, for the buckle of the present disclosure, since the width of the cord body at the outlet is smaller than the width at the inlet, the cord bodies can be adjacent and parallel to each other after passing out, effectively improving the aesthetics. In addition, the present disclosure changes the ways of respectively assembling the second fastener and the third fastener with the first fastener, so that the elastic member can be accommodated between the second fastener and the third fastener, resulting in a shorter overall length of the buckle of the present disclosure, thus having the advantage of high product versatility. Moreover, the buckle of the present disclosure can release the cord body bidirectionally and can automatically return to the state of locking the cord body, with high practicability and good operation experience.

[0120] Please refer to Figures 13 to 16, in the second embodiment, the disclosed fastener 100' includes a first fastener 1', a second fastener 2' and an elastic member 4. In this embodiment, the first fastener 1' is an integrally formed body of the first fastener 1 and the second fastener 2 in the foregoing first embodiment. The differences between the second embodiment and the first embodiment will be described below, and the same technical content will not be elaborated here.

[0121] The first fastener 1' includes a body 11', an extension body 12', a first through hole 13', a second through hole 14', two snap blocks 15', a receiving space 16' and a stepped section 17'. The receiving space 16' is formed inside the body 11'. The first through hole 13' is formed through one end of the body 11', and the second through hole 14' is formed through the other end of the body 11', and the first through hole 13' and the second through hole 14' communicate with the receiving space 16'. The extension body 12' extends outward from the body 11' and is located within the receiving space 16'. The two snap blocks 15' are respectively protruded from the inner side of the body 11' and face the receiving space 16'. The stepped section 17' is formed on the body 11' and adjacent to the second through hole 14', and is spaced from the two snap blocks 15'.

[0122] The body 11' has two opposite arc-shaped guiding surfaces 111' and two opposite guiding surfaces 112'. The arc-shaped guiding surfaces 111' are adjacent to the second through hole 14', and the guiding surfaces 112' are adjacent to the first through hole 13'.

[0123] The extension body 12' has four extension columns 121', a connecting portion 122' and a positioning column 123'. The extension columns 121' extend outward from the body 11' and are spaced from each other, and are correspondingly located within the receiving space 16'. The connecting portion 122' is connected to the ends of the extension columns 121'. The positioning column 123' extends outward from the connecting portion 122' and faces the second through hole 14'. The connecting portion 122' has two inclined surfaces 1221', and the two inclined surfaces 1221' respectively correspond to the two guiding surfaces 112'.

[0124] The second fastener 2' is disposed in the receiving space 16' and includes a base portion 21', two guiding columns 22', two snap portions 23', two convex ear portions 24' and two guiding convex portions 25'. A circular blind hole 211' is recessed in the bottom surface of the base portion 21'. The two guiding columns 22' extend outward from the bottom surface of the base portion 21' and are spaced from each other, and are respectively located on opposite sides of the connecting portion 122'. The two snap portions 23' extend outward from the sides of the two guiding columns 22' respectively. The two convex ear portions 24' extend outward from two opposite side surfaces of the base portion 21' respectively. The two guiding convex portions 25' are respectively formed on the other two opposite side surfaces of the base portion 21' and respectively correspond to the two arc-shaped guiding surfaces 111'.

[0125] The elastic member 4 is disposed in the accommodating space 16'. One end thereof is sleeved on the positioning post 123' and abuts against the connecting portion 122', and the other end is received in the blind hole 211'. In this embodiment, the elastic member 4 is a compression spring.

[0126] The actuation of the fastener 100' of the present disclosure will be described below. The fastener 100' can be switched between a locked state and a released state and can be penetrated by the ropes 7 and 8. In the locked state, due to the elastic force provided by the elastic member 4 to the connecting portion 122' and the base portion 21', the two convex ear portions 24' can respectively abut against the stepped section 17'. The base portion 21' can be correspondingly located in the second through hole 14', and the two snap blocks 15' are respectively snapped onto the two snap portions 23', whereby the first fastener 1' and the second fastener 2' will not separate from each other. At this time, the spaces defined by the two guiding protrusions 25' and the two guiding arc surfaces 111' and the spaces defined by the two inclined surfaces 1221' and the two guiding surfaces 112' can respectively form a first rope threading channel 5 and a second rope threading channel 6. The first rope threading channel 5 is for the rope 7 to pass through, the second rope threading channel 6 is for the rope 8 to pass through, and the ropes 7 and 8 are respectively clamped by the two guiding protrusions 25' of the base portion 21' and the two guiding arc surfaces 111' of the main body 11' and cannot move in the first rope threading channel 5 and the second rope threading channel 6.

[0127] When the fastener 100' is switched from the locked state to the released state, the two snap blocks 15' respectively disengage from the two snap portions 23', the two convex ear portions 24' disengage from the stepped section 17', the blind hole 211' and the connecting portion 122' jointly compress the elastic member 4, and the two guiding protrusions 25' respectively move away from the two guiding arc surfaces 111', and the two inclined surfaces 1221' respectively move away from the two guiding surfaces 112', whereby the ropes 7 and 8 can move in the first rope threading channel 5 and the second rope threading channel 6.

[0128] When the fastener 100' is switched from the released state to the locked state, due to the rebound of the elastic member 4, the two guiding protrusions 25' can respectively approach the two guiding arc surfaces 111' until the two snap blocks 15' respectively contact the two snap portions 23' and the two convex ear portions 24' respectively contact the stepped section 17', whereby the ropes 7 and 8 cannot move in the first rope threading channel 5 and the second rope threading channel 6.

[0129] In this embodiment, there is a first width W1 between the first rope threading channel 5 and the second rope threading channel 6 at the first through hole 13', and there is a second width W2 between the first rope threading channel 5 and the second rope threading channel 6 at the second through hole 14'. The second width W2 is greater than the first width W1. This can make the ropes 7 and 8 parallel to each other after passing through the first through hole 13', effectively improving the aesthetics.

[0130] Please refer to Figures 17 to 19, in the third embodiment, the fastener 100" of the present disclosure includes a first fastener 1", a second fastener 2 and an elastic member 4. In this embodiment, the first fastener 1" is an integrally formed body of the first fastener 1 and part of the third fastener 3 in the aforementioned first embodiment. The differences between the third embodiment and the first embodiment will be described below, and the same technical content will not be elaborated here.

[0131] The first fastener 1" includes a body 11", a first accommodation space 12", a first through hole 13", a positioning portion 16", two guiding columns 17", two convex ear portions 18" and two guiding convex portions 19". One side of the body 11" has two abutting surfaces 111" spaced apart from each other, and the inner side of the body 11" has two opposite guiding surfaces 112". The first accommodation space 12" is formed inside the body 11". The first through hole 13" is formed through the other side of the body 11" and communicates with the first accommodation space 12". The two guiding columns 17" are respectively protruded from the inner side of the body 11" and located in the first accommodation space 12", and are respectively located on opposite sides of the connecting portion 222. The bottom surface of the positioning portion 16" is recessed with a circular blind hole 161", and the size of the positioning portion 16" is smaller than the second through hole 24 and can be inserted through the second through hole 24 and fixedly connected to the two guiding columns 17". The way of fixedly connecting the positioning portion 16" and the guiding column 17" can be a male-female snap structure, adhesive bonding or other connection methods, and the present disclosure is not limited thereto. In addition, the purpose of fixedly connecting the positioning portion 16" and the guiding column 17" is to limit the elastic member 4 between the connecting portion 222 and the positioning portion 16" after the elastic member 4 is sleeved on the positioning column 223, so as to facilitate the assembly operation of the first fastener 1", the second fastener 2 and the elastic member 4. The two convex ear portions 18" respectively extend outward from opposite two side surfaces of the positioning portion 16". The two guiding convex portions 19" are respectively formed on the other two opposite side surfaces of the positioning portion 16", and respectively correspond to the two guiding arc surfaces 212.

[0132] The elastic member 4 is disposed in the second accommodation space 23, one end of which is sleeved on the positioning column 223 and abuts against the connecting portion 222, and the other end is accommodated in the blind hole 161". In this embodiment, the elastic member 4 is a compression spring.

[0133] The actuation of the fastener 100 of the present disclosure is described below. The fastener 100 can be switched between a locked state and a released state, and the ropes 7 and 8 can be threaded therethrough. In the locked state, due to the elastic force provided by the elastic member 4 to the connecting portion 222 and the positioning portion 16, the two convex ear portions 18 can respectively abut against the contact surfaces 211, the positioning portion 16 can be correspondingly located in the second through hole 24, and the two contact surfaces 211 respectively contact the two abutting surfaces 111. At this time, the spaces defined by the two guiding convex portions 19 and the two guiding arc surfaces 212 and the spaces defined by the two inclined surfaces 2221 and the two guiding surfaces 112 can respectively form the first rope threading channel 5 and the second rope threading channel 6. The first rope threading channel 5 is for the rope 7 to pass through, the second rope threading channel 6 is for the rope 8 to pass through, and the ropes 7 and 8 are respectively clamped by the two guiding convex portions 19 of the positioning portion 16 and the two guiding arc surfaces 212 of the seat body 21, and cannot move in the first rope threading channel 5 and the second rope threading channel 6.

[0134] When the fastener 100 is switched from the locked state to the released state, the two convex ear portions 18 and the two abutting surfaces 111 are separated from the two contact surfaces 211, the blind hole 161 and the connecting portion 222 jointly compress the elastic member 4, and the two guiding convex portions 19 respectively move away from the two guiding arc surfaces 212, and the two inclined surfaces 2221 respectively move away from the two guiding surfaces 112, whereby the ropes 7 and 8 can move in the first rope threading channel 5 and the second rope threading channel 6.

[0135] When the fastener 100 is switched from the released state to the locked state, due to the rebound of the elastic member 4, the two guiding convex portions 19 can respectively approach the two guiding arc surfaces 212, and the two inclined surfaces 2221 can respectively approach the two guiding surfaces 112 until the two convex ear portions 18 and the two abutting surfaces 111 respectively contact the two contact surfaces 211, whereby the ropes 7 and 8 cannot move in the first rope threading channel 5 and the second rope threading channel 6.

[0136] In this embodiment, there is a first width W1 between the first rope threading channel 5 and the second rope threading channel 6 at the first through hole 13, and there is a second width W2 between the first rope threading channel 5 and the second rope threading channel 6 at the second through hole 24, and the second width W2 is greater than the first width W1. This can make the ropes 7 and 8 parallel to each other after passing through the first through hole 13, effectively improving the aesthetics.

Claims

1. A fastener, comprising: A first fastener element, including a body, a first accommodating space and a first through hole. The first accommodating space is formed inside the body, and the first through hole penetrates through the body and communicates with the first accommodating space; A second fastener element, which is assembled with the first fastener element and includes a base body, an extension body, a second accommodating space and a second through hole. The base body is located on one side of the body and away from the first through hole. The extension body extends outward from the base body. The second accommodating space is defined by surrounding the base body and the extension body. The second through hole penetrates through the base body and communicates with the second accommodating space; and A third fastener element, disposed in the second accommodating space and including a base portion; wherein, the body, the base body, the extension body and the base portion respectively form a first rope threading channel and a second rope threading channel. The first rope threading channel and the second rope threading channel respectively allow a rope to pass through the second through hole to the first through hole. There is a first width between the first rope threading channel and the second rope threading channel at the first through hole, and there is a second width between the first rope threading channel and the second rope threading channel at the second through hole, and the second width is greater than the first width.

2. The fastener according to claim 1, wherein, the fastener further includes an elastic member disposed in the second accommodating space. A blind hole is recessed on the bottom surface of the base portion. One end of the elastic member abuts against the extension body, and the other end of the elastic body is accommodated in the blind hole.

3. The fastener according to claim 2, wherein, the fastener can be transformed between a first release state, a second release state and a locking state. When in the first release state and the second release state, the extension body and the base portion jointly compress the elastic member and move the base portion away from the base body, whereby the rope can move in the first rope threading channel and the second rope threading channel. When in the locking state, the base portion is adjacent to the base body, and the rope is jointly clamped by the base portion and the base body and cannot move in the first rope threading channel and the second rope threading channel.

4. The fastener according to claim 3, wherein, the extension body has four extension columns, a connecting portion and a positioning column. The extension columns extend outward from the base body and are spaced apart from each other. The connecting portion is connected to the ends of the extension columns. The positioning column extends outward from the connecting portion and faces the second through hole. One end of the elastic member is sleeved on the positioning column and abuts against the connecting portion.

5. The fastener according to claim 4, wherein, the first fastener element further includes two snap blocks, which protrude from the body and face the first accommodating space. The third fastener element further includes two guiding columns, two snap portions and two lug portions. The guiding columns respectively extend outward from the bottom surface of the base portion and are spaced apart from each other, and are respectively located on opposite sides of the connecting portion. The snap portions respectively extend outward from the side surfaces of the guiding columns. The lug portions respectively extend outward from opposite side surfaces of the base portion.

6. The fastener according to claim 5, wherein, the body has two abutting surfaces, and the base body has two contact surfaces, and the abutting surfaces respectively correspond to the contact surfaces.

7. The fastener according to claim 6, wherein, The connecting portion has two opposite inclined surfaces, and the body has two opposite guiding surfaces, and the inclined surfaces respectively correspond to the guiding surfaces.

8. The fastener according to claim 7, wherein, The third fastener further includes two guiding protrusions respectively formed on the other two opposite side surfaces of the base portion, and the seat body further has two opposite guiding arc surfaces, and the guiding protrusions respectively correspond to the guiding arc surfaces.

9. The fastener according to claim 8, wherein, When the fastener changes from the locked state to the second release state, the first fastener moves in a first direction, and the snap blocks respectively contact the snap portions while pulling the third fastener. At this time, the abutting surfaces respectively disengage from the contact surfaces, the convex ear portions disengage from the seat body, the inclined surfaces respectively move away from the guiding surfaces, the blind hole and the connecting portion jointly compress the elastic member, and the guiding protrusions respectively move away from the guiding arc surfaces.

10. The fastener according to claim 8, wherein, When the fastener changes from the second release state to the locked state, the first fastener moves in a second direction, and at the same time the elastic member rebounds, thereby making the guiding protrusions respectively adjacent to the guiding arc surfaces and making the inclined surfaces respectively adjacent to the guiding surfaces until the abutting surfaces respectively contact the contact surfaces and the convex ear portions contact the seat body.

11. The fastener according to claim 8, wherein, When the fastener changes from the locked state to the first release state, the first fastener moves in the second direction, the snap blocks respectively disengage from the snap portions, the convex ear portions disengage from the seat body, and the first fastener pushes the second fastener with the abutting surfaces respectively contacting the contact surfaces. At this time, the blind hole and the connecting portion jointly compress the elastic member, and the guiding protrusions respectively move away from the guiding arc surfaces.

12. The fastener according to claim 8, wherein, When the fastener changes from the first release state to the locked state, the first fastener moves in the first direction, and at the same time the elastic member rebounds, thereby making the guiding protrusions respectively adjacent to the guiding arc surfaces until the snap blocks respectively contact the snap portions and the convex ear portions contact the seat body.

13. The fastener according to claim 8, wherein, The first rope-passing channel and the second rope-passing channel are respectively constituted by the space surrounded and defined by the guiding protrusions and the guiding arc surfaces and the space surrounded and defined by the inclined surfaces and the guiding surfaces.

14. The fastener according to claim 4, wherein, The connecting portion has an H-shaped cross-section.

15. The fastener according to claim 2, wherein, The elastic member is a compression spring.

16. The fastener according to claim 1, wherein, The body has a hollow and tapered structure.

17. A fastener, comprising: A first fastener, including a body, a receiving space, an extension body, a first through hole and a second through hole. The receiving space is formed inside the body. The first through hole is formed through one end of the body and communicates with the receiving space. The second through hole is formed through the other end of the body and communicates with the receiving space. The extension body extends outward from the body and is located inside the receiving space; and A second fastener, disposed in the receiving space and including a base portion; Wherein, the body, the extension body and the base respectively form a first rope threading channel and a second rope threading channel. The first rope threading channel and the second rope threading channel respectively allow a rope body to pass through from the second through hole to the first through hole. There is a first width between the first rope threading channel and the second rope threading channel at the first through hole, and a second width between the first rope threading channel and the second rope threading channel at the second through hole, and the second width is greater than the first width.

18. The buckle according to claim 17, wherein, the buckle further includes an elastic member disposed in the accommodating space. A blind hole is recessed in the bottom surface of the base. One end of the elastic member abuts against the extension body, and the other end of the elastic body is received in the blind hole.

19. The buckle according to claim 18, wherein, the buckle can be transformed between a release state and a locking state. When in the release state, the extension body and the base jointly compress the elastic member and move the base away from the second through hole, whereby the rope body can move in the first rope threading channel and the second rope threading channel. When in the locking state, the base is adjacent to the second through hole, and the rope body is jointly clamped by the base and the body and cannot move in the first rope threading channel and the second rope threading channel.

20. The buckle according to claim 19, wherein, the extension body has four extension columns, a connecting portion and a positioning column. The extension columns extend outward from the body and are spaced apart from each other, and are correspondingly located in the accommodating space. The connecting portion is connected to the ends of the extension columns. The positioning column extends outward from the connecting portion and faces the second through hole. One end of the elastic member is sleeved on the positioning column and abuts against the connecting portion.

21. The buckle according to claim 20, wherein, the first fastener further includes two snap blocks and a stepped section. The snap blocks protrude from the body and face the accommodating space. The stepped section is formed on the body and is adjacent to the second through hole and is spaced apart from the snap blocks. The second fastener further includes two guiding columns, two snap portions and two lug portions. The guiding columns respectively extend outward from the bottom surface of the base and are spaced apart from each other, and are respectively located on opposite sides of the connecting portion. The snap portions respectively extend outward from the sides of the guiding columns. The lug portions respectively extend outward from opposite two side surfaces of the base.

22. The buckle according to claim 21, wherein, the connecting portion has two opposite inclined surfaces, and the body has two opposite guiding surfaces. The inclined surfaces respectively correspond to the guiding surfaces.

23. The buckle according to claim 22, wherein, the second fastener further includes two guiding convex portions respectively formed on the other two opposite side surfaces of the base. The body further has two opposite guiding arc surfaces. The guiding convex portions respectively correspond to the guiding arc surfaces.

24. The buckle according to claim 23, wherein, when the buckle is transformed from the locking state to the release state, the snap blocks respectively disengage from the snap portions, the lug portions disengage from the stepped section, the inclined surfaces respectively move away from the guiding surfaces, the blind hole and the connecting portion jointly compress the elastic member, and the guiding convex portions respectively move away from the guiding arc surfaces.

25. The buckle according to claim 23, wherein, when the buckle changes from the release state to the locking state, the elastic member rebounds, whereby the guiding convex portions are respectively adjacent to the guiding arc surfaces until the buckle blocks respectively contact the buckle portions and the convex ear portions contact the stepped section.

26. The buckle according to claim 23, wherein, the first rope threading channel and the second rope threading channel are respectively constituted by the space defined by the guiding convex portion and the guiding arc surface and the space defined by the inclined surface and the guiding surface.

27. A buckle, comprising: a first fastener including a body, a first accommodating space, a first through hole and a positioning portion, the first accommodating space is formed inside the body, the first through hole is formed through the body and communicates with the first accommodating space; and a second fastener which is assembled with the first fastener and includes a seat body, an extension body, a second accommodating space and a second through hole, the seat body is located on one side of the body and away from the first through hole, the extension body extends outward from the seat body, the second accommodating space is defined by the seat body and the extension body, the second through hole is formed through the seat body and communicates with the second accommodating space; wherein, the positioning portion is correspondingly located in the second through hole, the body, the seat body, the extension body and the base respectively constitute a first rope threading channel and a second rope threading channel, the first rope threading channel and the second rope threading channel respectively allow a rope to pass through the second through hole to the first through hole, there is a first width between the first rope threading channel and the second rope threading channel at the first through hole, there is a second width between the first rope threading channel and the second rope threading channel at the second through hole, and the second width is greater than the first width.

28. The buckle according to claim 27, wherein, the buckle further includes an elastic member disposed in the second accommodating space, a blind hole is recessed in the bottom surface of the positioning portion, one end of the elastic member abuts against the extension body, and the other end of the elastic body is accommodated in the blind hole.

29. The buckle according to claim 28, wherein, the buckle can be changed between a release state and a locking state. When in the release state, the extension body and the positioning portion jointly compress the elastic member and move the positioning portion away from the seat body, whereby the rope can move in the first rope threading channel and the second rope threading channel. When in the locking state, the positioning portion is adjacent to the seat body, and the rope is jointly clamped by the positioning portion and the seat body and cannot move in the first rope threading channel and the second rope threading channel.

30. The buckle according to claim 29, wherein, the extension body has four extension columns, a connecting portion and a positioning column. The extension columns extend outward from the seat body and are spaced apart from each other. The connecting portion is connected to the ends of the extension columns. The positioning column extends outward from the connecting portion and faces the second through hole. One end of the elastic member is sleeved on the positioning column and abuts against the connecting portion.

31. The buckle according to claim 30, wherein, The first fastener further includes two guiding columns and two lug portions. The guiding columns protrude from the body and are located in the first accommodating space, and are respectively located on opposite sides of the connecting portion and are fixedly connected to the positioning portion. The lug portions extend outward from opposite two side surfaces of the positioning portion respectively.

32. The fastener according to claim 31, wherein, the body has two abutting surfaces, and the seat body has two contacting surfaces, and the abutting surfaces respectively correspond to the contacting surfaces.

33. The fastener according to claim 32, wherein, the connecting portion has two opposite inclined surfaces, and the body has two opposite guiding surfaces, and the inclined surfaces respectively correspond to the guiding surfaces.

34. The fastener according to claim 33, wherein, the first fastener further includes two guiding protrusions, which are respectively formed on the other two opposite side surfaces of the positioning portion. The seat body further has two opposite guiding arc surfaces, and the guiding protrusions respectively correspond to the guiding arc surfaces.

35. The fastener according to claim 34, wherein, when the fastener changes from the locked state to the released state, the abutting surfaces respectively disengage from the contacting surfaces, the lug portions disengage from the seat body, the inclined surfaces respectively move away from the guiding surfaces, the blind hole and the connecting portion jointly compress the elastic member, and the guiding protrusions respectively move away from the guiding arc surfaces.

36. The fastener according to claim 35, wherein, when the fastener changes from the released state to the locked state, the elastic member rebounds, thereby causing the guiding protrusions to respectively approach the guiding arc surfaces and the inclined surfaces to respectively approach the guiding surfaces until the abutting surfaces respectively contact the contacting surfaces and the lug portions contact the seat body.

37. The fastener according to claim 36, wherein, the first rope passing channel and the second rope passing channel are respectively constituted by the space surrounded and defined by the guiding protrusions and the guiding arc surfaces and the space surrounded and defined by the inclined surfaces and the guiding surfaces.

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