Tether adjustment module and tether buckle mechanism

Abstract

This invention discloses a cord adjustment module and a cord buckle mechanism. The cord buckle mechanism does not include any elastic members and includes a female buckle and a male buckle. The female buckle forms a first opening, a second opening, and a positioning groove communicating with the second opening. The male buckle passes through the female buckle and is movable between an unlocked position away from the second opening and a locked position adjacent to the second opening. The male buckle includes a body portion, a locking portion connected to one end of the body portion, and an unlocking portion connected to the other end of the body portion, and the position of the locking portion corresponds to the positioning groove. When the male buckle is in the locked position, at least one positioning slit is formed between the locking portion and the adjacent groove wall of the positioning groove.

Description

Technical Field

[0001] This invention relates to a fastener, and more particularly to a rope adjustment module and rope buckle mechanism that can lock and unlock a rope without the need for an elastic component. Prior Technology

[0002] Most existing rope buckle mechanisms are equipped with elastic components to adjust the tightness of the rope; however, the elastic components not only cause assembly difficulties, but are also prone to elastic fatigue, which can lead to a decrease in their positioning effect on the rope or even failure.

[0003] Therefore, the inventors believe that the above-mentioned defects can be improved, and propose an invention that is reasonably designed and effectively improves the above-mentioned defects. Summary of the Invention

[0004] This invention provides a rope adjustment module and a rope buckle mechanism, which can effectively improve the defects that may occur in existing rope buckle mechanisms.

[0005] This invention discloses a cord adjustment module, comprising: a cord buckle mechanism without any elastic components; wherein the cord buckle mechanism includes: a female buckle forming a receiving space, the female buckle forming a first opening and a second opening respectively communicating with both ends of the receiving space, and the female buckle forming a positioning groove communicating with the receiving space and the second opening; and a male buckle passing through the receiving space of the female buckle and movable along the female buckle between an unlocked position away from the second opening and a locked position adjacent to the second opening; wherein the male buckle includes: a body portion forming a cord receiving space; a locking portion connected to one end of the body portion and its position corresponding to the positioning groove; and an unlocking portion connected to... At the other end of the main body; and a cord having: two built-in sections located within the cord-receiving space of the main body of the male buckle; a control section connected to one end of the two built-in sections, and the control section being adjacent to the locking part; and two adjustment sections respectively connected to the other ends of the two built-in sections; wherein, when the control section is pulled and positioned within the positioning groove, causing the male buckle to move relative to the female buckle to the locking position, the two adjustment sections generate tension and press the male buckle toward the direction of the second opening, the locking part being adjacent to the positioning groove, and at least one positioning slit being formed between the locking part and the adjacent groove wall of the positioning groove, the control section being fixed within at least one positioning slit under pressure deformation.

[0006] This invention also discloses a rope buckle mechanism that does not include any elastic components. The rope buckle mechanism includes: a female buckle forming a receiving space, the female buckle forming a first opening and a second opening respectively communicating with both ends of the receiving space, and the female buckle forming a positioning groove communicating with the receiving space and the second opening; and a male buckle passing through the receiving space of the female buckle and movable along the female buckle between an unlocked position away from the second opening and a locked position adjacent to the second opening; wherein the male buckle includes: a body portion forming a rope receiving space therein; a locking portion connected to one end of the body portion and its position corresponding to the positioning groove; and an unlocking portion connected to the other end of the body portion; wherein, when the male buckle is in the locked position, at least one positioning slit is formed between the locking portion and the adjacent groove wall of the positioning groove.

[0007] In summary, the rope adjustment module and rope buckle mechanism disclosed in the embodiments of the present invention, through the structural cooperation of the male buckle, the female buckle, and the rope (e.g., the pulling of the control section drives the male buckle and the female buckle to move relative to each other to form at least one positioning slit), can effectively achieve the positioning of the rope without using an elastic component structure, thereby effectively improving the installation and operation convenience of the rope buckle mechanism and enabling the rope buckle mechanism to position the rope more stably.

[0008] To further understand the features and technical content of this invention, please refer to the following detailed description and accompanying drawings. However, these descriptions and drawings are only for illustrating the invention and are not intended to limit the scope of protection of the invention in any way. Simple Explanation of the Diagram

[0009] Figure 1 is a perspective view of the cord adjustment module of the present invention when the male buckle is in the locked position and applied to the shoe body.

[0010] Figure 2 is a perspective view of the cord adjustment module of the present invention when the male buckle is in the unlocked position and applied to the shoe body.

[0011] Figure 3 is an exploded view of the rope buckle mechanism according to an embodiment of the present invention.

[0012] Figure 4 is an exploded view of the rope buckle mechanism according to an embodiment of the present invention.

[0013] Figure 5 is a partially enlarged schematic diagram of Figure 1.

[0014] Figure 6 is a top view of the cord adjustment module of the present invention when the male buckle is in the locked position.

[0015] Figure 7 is a front view of the cord adjustment module of the present invention when the male buckle is in the locked position.

[0016] Figure 8 is a schematic cross-sectional view along section line VIII-VIII in Figure 6.

[0017] Figure 9 is a perspective view of the cord adjustment module of the present invention when the male buckle is in the locked position.

[0018] Figure 10 is a partially enlarged schematic diagram of Figure 2. Implementation

[0019] The following specific embodiments illustrate the implementation of the "cord adjustment module and cord buckle mechanism" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated in advance. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention.

[0020] It should be understood that although terms such as "first," "second," and "third" may be used in this document to describe various elements or features, these elements or features should not be limited by these terms. These terms are primarily used to distinguish one element from another, or one feature from another. Furthermore, the term "or" as used herein may, as appropriate, include any combination of one or more of the related listed items.

[0021] Please refer to Figures 1 to 10, which illustrate an embodiment of the present invention. As shown in Figures 1 and 2, this embodiment discloses a cord adjustment module 100, which includes a cord buckle mechanism 1 and a cord 2 mounted on the cord buckle mechanism 1. The cord adjustment module 100 can be applied to an object, and in this embodiment, the object is described as a shoe body 200, which includes a sole 201 and a vamp 202 connected to the sole 201. However, the present invention is not limited to this. For example, in other embodiments not shown in the present invention, the object may also be of other types (e.g., clothing, trousers, or various bags) depending on actual needs.

[0022] It should be noted that although the rope buckle mechanism 1 is described in this embodiment in conjunction with the rope 2, the present invention is not limited thereto. For example, in other embodiments of the present invention not shown, the rope buckle mechanism 1 may also be used alone (e.g., for sale) or in conjunction with other components, depending on actual needs.

[0023] In this embodiment, the cord buckle mechanism 1 is defined as not containing any elastic members; that is, any buckle configured with elastic members (such as springs) is different from the cord buckle mechanism 1 referred to in this embodiment. The cord buckle mechanism 1 includes a female buckle 11 installed on the shoe upper 202 and a male buckle 12 movably threaded through the female buckle 11.

[0024] More specifically, as shown in Figures 3 to 5, the female buckle 11 includes a main body 111 and a fixing part 112 connected to one end of the main body 111. The fixing part 112 is fixed to the upper part 202 and allows the main body 111 to rotate relative to the upper part 202 under force. In this embodiment, the fixing part 112 is described as a webbing wrapped around the main body 111, and the webbing is sewn to the upper part 202, but the invention is not limited thereto. For example, in other embodiments not shown in the invention, the fixing part 112 may be a sewn piece integrally extended from the main body 111, which is sewn to the upper part 202.

[0025] Furthermore, the female buckle 11 (e.g., the main body 111) forms an accommodating space 113, and the female buckle 11 (e.g., the main body 111) forms a first opening 114 and a second opening 115 respectively communicating with the two ends of the accommodating space 113, and the female buckle 11 forms a positioning groove 1112a communicating with the accommodating space 113 and the second opening 115.

[0026] In this embodiment, the positioning groove 1112a has two protrusions 1112b at its opening; wherein the groove wall of the positioning groove 1112a is approximately U-shaped, and the two protrusions 1112b are respectively located at the two ends of the groove wall to narrow the opening of the positioning groove 1112a. However, the number of protrusions 1112b can also be adjusted according to actual needs; for example, the positioning groove 1112a may also have at least one protrusion 1112b at its opening.

[0027] It should be noted that, in order to facilitate a clearer understanding of the female buckle 11 in this embodiment, the following content will describe its structure using one of the feasible forms of the female buckle 11, but the present invention is not limited thereto.

[0028] Furthermore, in this embodiment, the main body 111 is a single-piece structure integrally formed, comprising a bottom wall 1111, a top wall 1112, two side walls 1113 connecting the bottom wall 1111 and the top wall 1112, and a fastener 1114 connected to the bottom wall 1111. The bottom wall 1111, the top wall 1112, and the two side walls 1113 are identical and together form a generally annular structure, with the first opening 114 and the second opening 115 formed at their respective ends.

[0029] The bottom wall 1111 has a guide groove 1111a recessed at the center corresponding to the second opening 115. A limiting post 1111b is formed on the bottom wall 1111 adjacent to the first opening 114. Furthermore, a through-type track groove 1111c is formed between the guide groove 1111a and the limiting post 1111b on the bottom wall 1111. In other words, the guide groove 1111a, the track groove 1111c, and the limiting post 1111b are arranged approximately in a straight line.

[0030] Furthermore, the top wall 1112 has a recessed positioning groove 1112a at the portion corresponding to the first opening 114, and the positioning groove 1112a is approximately located above one end of the guide groove 1111a and the track groove 1111c. That is, the projection area formed by the positioning groove 1112a of the top wall 1112 projected onto the bottom wall 1111 surrounds one end of the guide groove 1111a and the track groove 1111c.

[0031] Furthermore, the fixing part 112 is mounted on the buckle 1114, and the buckle 1114 and the fixing part 112 are adjacent to the second opening 115. That is, the female buckle 11 is adjacent to the upper part 202 with the bottom wall 1111.

[0032] The male buckle 12 passes through the receiving space 113 of the female buckle 11 and can move along the female buckle 11 between an unlocked position away from the second opening 115 (e.g., Figures 2 and 10) and a locked position adjacent to the second opening 115 (e.g., Figures 1 and 5). It should be emphasized that there is no elastic member between the male buckle 12 and the female buckle 11 to drive their relative movement.

[0033] It should be noted that the male buckle 12 in this embodiment is a single-piece structure integrally formed, and in order to facilitate a clearer understanding of the male buckle 12, the following content will describe its structure using one of the feasible forms of the male buckle 12, but the present invention is not limited thereto.

[0034] As shown in Figures 3 to 5, the male buckle 12 includes a body portion 121, a locking portion 122 connected to one end of the body portion 121, and an unlocking portion 123 adjacent to the other end of the body portion 121. The body portion 121 has a rope-accommodating space 1211 formed within it, and the body portion 121 has at least one front opening 1212 communicating with one end of the rope-accommodating space 1211, and two rear openings 1213 communicating with the other end of the rope-accommodating space 1211.

[0035] Furthermore, at least one of the front openings 1212 is adjacent to the unlocking part 123, and in this embodiment, the number of such openings is described as two. The body part 121 also forms a limiting groove 1214 that divides the rope-containing space 1211 into two regions. The opening of the limiting groove 1214 is approximately located between the two front openings 1212, but the invention is not limited thereto. Moreover, the two rear openings 1213 correspond to the two front openings 1212 respectively, and the two rear openings 1213 are separated by the locking part 122.

[0036] The locking part 122 is generally T-shaped and has a dividing section 1221, two clamping sections 1222 connected to one end of the dividing section 1221, and a protrusion 1223 connected to the other end of the dividing section 1221. The dividing section 1221 is plate-shaped and connected to the body part 121, and the dividing section 1221 separates the two rear openings 1213, while the protrusion 1223 is adjacent to the limiting groove 1214. Furthermore, the two clamping sections 1222 are connected to the body part 121 and are located on opposite sides of the dividing section 1221; that is, the two clamping sections 1222 are adjacent to the two rear openings 1213, and the two clamping sections 1222 are located on the same side of the two rear openings 1213 (e.g., above the two rear openings 1213 in Figure 7).

[0037] The unlocking part 123 is generally annular, and in this embodiment, a strap 13 is additionally attached to the unlocking part 123. The strap 13 is annular and installed on the unlocking part 123; that is, the strap 13 is not fixed to the upper part 202, so that the user can operate the unlocking part 123 by applying force to the strap 13, but the present invention is not limited thereto. For example, in other embodiments of the present invention not shown, one end of the strap 13 is installed on the unlocking part 123, while the other end of the strap 13 is fixed to the upper part 202; or, the strap 13 may be omitted or replaced by other components according to actual needs.

[0038] Furthermore, the male buckle 12 is inserted into the receiving space 113 of the female buckle 11 through the second opening 115 with the unlocking part 123, so that the limiting groove 1214 moves along the limiting post 1111b, and the protrusion 1223 enters the track groove 1111c via the guide groove 1111a, thereby making the position of the locking part 122 correspond to the positioning groove 1112a, and the two clamping sections 1222 of the locking part 122 move away from the fixing part 112.

[0039] Accordingly, the mutual limiting engagement of the limiting groove 1214 and the limiting post 1111b prevents the male buckle 12 from disengaging from the female buckle 11 through the first opening 114; and the mutual limiting engagement of the protrusion 1223 and the track groove 1111c prevents the male buckle 12 from disengaging from the female buckle 11 through the second opening 115. However, the present invention is not limited to the above. For example, in other embodiments of the present invention not shown, the engagement of the limiting groove 1214 and the limiting post 1111b or the engagement of the protrusion 1223 and the track groove 1111c may be replaced by other structures according to actual needs.

[0040] As shown in Figures 5 to 9, the cord 2 has a restraint portion 21 that passes through the upper part of the shoe 202 and an adjustment portion 22 that passes through the upper part of the shoe 202, and the adjustment portion 22 is installed on the cord buckle mechanism 1 (e.g., the male buckle 12). The adjustment portion 22 has two built-in sections 221, a control section 222 connected to one end of the two built-in sections 221, and two adjustment sections 223 respectively connected to the other end of the two built-in sections 221.

[0041] More specifically, the two built-in segments 221 are located within the cord-receiving space 1211 of the body portion 121 of the male buckle 12. The control segment 222 is connected to the two built-in segments 221 that respectively extend from the two rear openings 1213, and the control segment 222 is adjacent to the locking portion 122. Furthermore, the two adjustment segments 223 extend from the upper part 202; that is, the two adjustment segments 223 are connected to the restraint portion 21.

[0042] It should be noted that, in this embodiment, the control segment 222 is described as a continuous section of the rope 2. However, in other embodiments not shown in this invention, the control segment 222 may also be formed by fixing two rope ends together, depending on actual needs.

[0043] The above content describes the structure of the shoe body 200 (or the cord adjustment module 100). The following content will describe the operation of the cord adjustment module 100.

[0044] As shown in Figures 5 to 9, when the control segment 222 is pulled away from the upper part 202 and positioned within the positioning groove 1112a, causing the male buckle 12 to move relative to the female buckle 11 to the locking position, the two adjustment segments 223 generate tension and press the male buckle 12 towards the second opening 115. The locking part 122 is adjacent to the positioning groove 1112a, and at least one positioning slit S is formed between the locking part 122 and the adjacent groove wall of the positioning groove 1112a. The control segment 222 is fixed within at least one positioning slit S under pressure and deformation.

[0045] Accordingly, the rope buckle mechanism 1 can effectively position the rope 2 without using an elastic component, through the structural cooperation of the male buckle 12, the female buckle 11, and the adjustment part 22 (e.g., the pulling of the control section 222 drives the male buckle 12 and the female buckle 11 to move relative to each other to form at least one positioning slit S, thereby positioning the control section 222).

[0046] Furthermore, as shown in Figure 10, when the unlocking part 123 is pulled away from the shoe upper 202, causing the male buckle 12 to move relative to the female buckle 11 to the unlocking position, the adjusting part 22 of the cord 2 has no tension, thereby allowing the cord 2 to adjust its tightness according to the user's needs.

[0047] It should be further noted that when the control segment 222 is pulled away from the upper part 202 (e.g., the control segment 222 is pulled upward), the cord buckle mechanism 1 is fixed to the upper part 202 through the fixing part 112 of the female buckle 11, so that the cord buckle mechanism 1 can rotate relative to the upper part 202, so as to facilitate the male buckle 12 to move to the locking position relative to the female buckle 11, but the present invention is not limited to this.

[0048] Furthermore, the way in which the locking part 122 and the positioning groove 1112a jointly clamp and position the control section 222 can be adjusted and varied according to actual needs. However, for ease of understanding, the following description will use one form of the rope adjustment module 100, but the present invention is not limited thereto.

[0049] As shown in Figures 5 to 9, when the male buckle 12 is in the locked position, each of the front openings 1212 is exposed outside the first opening 114, so that each of the adjustment sections 223 can press against the hole wall of the corresponding front opening 1212, and each of the clamping sections 1222 and the adjacent groove wall of the positioning groove 1112a jointly clamp the control section 222.

[0050] More specifically, when the male buckle 12 is in the locked position, each clamping segment 1222 and the adjacent groove wall of the positioning groove 1112a together form a positioning slit S, and the rope diameter D2 of the rope 2 is greater than the width W of any of the positioning slits S, so that the control segment 222 is fixed within each positioning slit S by compression deformation.

[0051] Furthermore, when the male buckle 12 is in the locked position, the two protrusions 1112b are respectively located at the ends of the two positioning slits S (that is, each positioning slit S and the corresponding protrusion 1112b are adjacent to a rear opening 1213), and the distance L between each protrusion 1112b and the locking part 122 (e.g., the corresponding clamping section 1222) is less than the width W of the corresponding positioning slit S, thereby effectively preventing the control section 222 from falling out of the corresponding positioning slit S through each protrusion 1112b.

[0052] From another perspective, when the male buckle 12 is in the locked position, the width W of each positioning slit S is between 40% and 50% of the diameter D1213 of the corresponding rear opening 1213, and the distance L between each protrusion 1112b and the locking part 122 (e.g., the corresponding clamping section 1222) is between 30% and 40% of the diameter D1213 of the corresponding rear opening 1213.

[0053] Furthermore, each of the protrusions 1112b and the end of the adjacent clamping segment 1222 respectively form two guide slopes G, and the distance between the two guide slopes G gradually increases in the direction away from the corresponding positioning slit S, so as to facilitate the control segment 222 to enter the corresponding positioning slit S through any two adjacent guide slopes G.

[0054] It should be noted that the rope buckle mechanism 1 in the above description of this embodiment is described with two positioning slits S and their corresponding structures, but the number of positioning slits S can also be adjusted and changed according to actual needs; that is, the rope buckle mechanism 1 can also be formed with at least one positioning slit S.

[0055] [Technical Effects of the Embodiments of the Invention]

[0056] In summary, the rope adjustment module and rope buckle mechanism disclosed in the embodiments of the present invention, through the structural cooperation of the male buckle, the female buckle, and the rope (e.g., the pulling of the control section drives the male buckle and the female buckle to move relative to each other to form at least one positioning slit, thereby positioning the control section), can effectively achieve the positioning of the rope without using an elastic component structure, thereby effectively improving the installation and operation convenience of the rope buckle mechanism and enabling the rope buckle mechanism to position the rope more stably.

[0057] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the patent scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included within the patent scope of the present invention.

[0058] 100: Rope Adjustment Module 1: Rope buckle mechanism 11: Female buckle 111: Main body 1111: Bottom wall 1111a: Guide groove 1111b: Limiting post 1111c: Track groove 1112: Top Wall 1112a: Positioning groove 1112b: Protrusion 1113: Sidewall 1114: Buckle 112: Fixing part 113: Storage space 114: First Opening 115: Second opening 12: Public deduction 121: Ontology part 1211: Rope Space 1212: Front opening 1213: Post-drilling hole 1214: Limiting groove 122: Locking Unit 1221: Separator 1222: Clamping Section 1223: Bump 123: Unlocking Department 13: Band 2: Ropes 21: Restraints 22: Adjustment section 221: Built-in segment 222: Control Section 223: Adjustment section 200: Shoe body 201: Shoe sole 202: Upper part of the shoe S: Positioning slit W: Width D2: Rope Diameter D1213: Aperture L: Distance G: Import sloping surface

Claims

1. A cord adjustment module, comprising: A cord buckle mechanism, which does not include any elastic members; wherein the cord buckle mechanism includes: a female buckle forming a receiving space, the female buckle forming a first opening and a second opening respectively communicating at both ends of the receiving space, and the female buckle forming a positioning groove communicating between the receiving space and the second opening; and a male buckle passing through the receiving space of the female buckle and movable along the female buckle between an unlocked position away from the second opening and a locked position adjacent to the second opening; wherein the male buckle includes: a body portion having a cord receiving space formed therein; a locking portion connected to one end of the body portion and its position corresponding to the positioning groove; and an unlocking portion connected to the other end of the body portion; and a cord having: two built-in sections located within the cord receiving space of the body portion of the male buckle; a control section connected to one end of the two built-in sections and the control section adjacent to the locking portion; and two adjustment sections respectively connected to the other ends of the two built-in sections. When the control section is pulled and positioned within the positioning groove, causing the male buckle to move relative to the female buckle to the locking position, the two adjustment sections generate tension and press the male buckle toward the direction of the second opening. The locking part is adjacent to the positioning groove, and at least one positioning slit is formed between the locking part and the adjacent groove wall of the positioning groove. The control section is fixed within at least one positioning slit under pressure and deformation.

2. The cord adjustment module as described in claim 1, wherein, The body portion has at least one front opening adjacent to the unlocking portion; wherein, when the male buckle is in the locked position, at least one of the front openings is exposed outside the first opening, so that the two adjustment segments can press against the wall of at least one of the front openings.

3. The cord adjustment module as described in claim 1, wherein, The diameter of the cord is greater than the width of at least one of the positioning slits.

4. The cord adjustment module as described in claim 1, wherein, The body portion has two rear openings separated by the locking portion; wherein, when the male buckle is in the locked position, at least one of the positioning slits is adjacent to at least one of the rear openings, and the width of at least one of the positioning slits is between 40% and 50% of the diameter of the corresponding rear opening.

5. The cord adjustment module as described in claim 1, wherein, The positioning groove has at least one protrusion at its opening; wherein, when the male buckle is in the locked position, at least one of the protrusions is located at the end of at least one of the positioning slits, and the distance between at least one of the protrusions and the locking part is less than the width of at least one of the positioning slits.

6. The cord adjustment module as described in claim 5, wherein, The body portion has two rear openings separated by the locking portion; wherein, when the male buckle is in the locked position, at least one of the positioning slits and at least one of the protrusions are adjacent to at least one of the rear openings, and the distance between at least one of the protrusions and the locking portion is between 30% and 40% of the diameter of the corresponding rear opening.

7. The cord adjustment module as described in claim 1, wherein, The main body has two rear openings, and the locking part has: a partition section separating the two rear openings; and two clamping sections connected to the partition section and located on the same side of the two rear openings respectively; wherein, when the male buckle is in the locked position, each clamping section and the adjacent groove wall of the positioning groove jointly clamp the control section.

8. The cord adjustment module as described in claim 7, wherein, The number of at least one positioning slit is two, and each clamping segment and the adjacent groove wall of the positioning groove together form one positioning slit. The positioning groove has two protrusions at its opening. When the male buckle is in the locked position, the two protrusions are respectively located at the ends of the two positioning slits, and each protrusion and the end of the adjacent clamping segment respectively form two guide ramps. The distance between the two guide ramps gradually increases in the direction away from the corresponding positioning slit.

9. The cord adjustment module as described in claim 1, wherein, The female buckle includes a fixing portion adjacent to the second opening for securing to an object; the cord passes through the object and has an adjustment portion extending out of the object, and the adjustment portion has two built-in sections, a control section, and two adjustment sections extending out of the object; wherein the control section can be pulled away from the object and positioned within the positioning groove, causing the male buckle to move relative to the female buckle to the locked position; wherein the unlocking portion can be pulled away from the object, causing the male buckle to move relative to the female buckle to the unlocked position, and the adjustment portion of the cord is without tension.

10. A cord lock mechanism that does not include any elastic member, the cord lock mechanism comprising: A female buckle forms a receiving space, the female buckle having a first opening and a second opening respectively communicating with both ends of the receiving space, and the female buckle having a positioning groove communicating with the receiving space and the second opening; and a male buckle, passing through the receiving space of the female buckle, and movable along the female buckle between an unlocked position away from the second opening and a locked position adjacent to the second opening; wherein the male buckle includes: a body portion having a rope receiving space therein; a locking portion connected to one end of the body portion and its position corresponding to the positioning groove; and an unlocking portion connected to the other end of the body portion; wherein, when the male buckle is in the locked position, at least one positioning slit is formed between the locking portion and the adjacent groove wall of the positioning groove.

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