A replaceable fastener

Abstract

This utility model discloses a replaceable fastener that enables the assembly and disassembly of webbing, has a stable structure, is not easily deformed or broken, requires no thickened crossbar, and reduces material usage. It includes a connecting body and a crossbar. The connecting body includes a main body, a connecting part formed on the main body for connection with another fastener or an external webbing, and two elastic cantilever arms fixed to the main body and arranged opposite each other. An installation space for inserting the crossbar is formed between the two elastic cantilever arms. The width of the end of the elastic cantilever arm is increased, and a limiting step is formed on each of the front and rear sides of the elastic cantilever arm. The crossbar includes a connecting arm for passing through the webbing, and two limiting members fixed to the left and right ends of the connecting arm, corresponding one-to-one with each elastic cantilever arm. A slot is formed on the side of the limiting member facing away from the connecting arm, penetrating the upper and lower surfaces of the limiting member. The elastic cantilever arm is inserted into the slot, and the upper surface of the limiting member abuts against the two limiting steps on both sides of the corresponding slot.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a replaceable fastener. Background Technology

[0002] Plastic buckles are connectors made of plastic that allow for the releasable connection of two sections of rope or webbing. The buckles connect with the ropes or webbing on the bag to form a carrying system, allowing the user to secure the bag to their body. The connection point between the buckle and the rope or webbing is typically a horizontal bar. By securing the rope or webbing to this bar, the connection between the rope or webbing and the buckle is achieved; therefore, this horizontal bar is also called a strap retainer. Based on the connection method between the horizontal bar and the buckle, buckles on the market are mainly divided into two types: integrated buckles and quick-release buckles. Integrated buckles have higher strength, but the webbing is fixed to the horizontal bar and cannot be removed, making it difficult to meet the user's need for strap replacement. Quick-release buckles mainly come in three types. The first type has a notch in the middle of the crossbar, allowing the webbing to be threaded through the notch to complete the assembly. However, this notch weakens the crossbar, causing the webbing to detach under tension and deformation, resulting in insufficient stability of the buckle-webbing connection. The second type fixes one end of the crossbar to the buckle, while the other end is detachably fastened. The webbing is then threaded onto the crossbar before fastening it. When the webbing pulls the crossbar under the weight of the bag and external forces, the uneven stress on the left and right ends makes the crossbar prone to breakage, thus affecting the buckle's lifespan. The third type involves horizontally passing the crossbar through and fixing it to the buckle. The crossbar simultaneously passes through the webbing, using both the buckle and the crossbar for positioning. In this case, to ensure the crossbar's strength, it needs to be thickened, increasing the overall material usage of the buckle and thus raising production costs. Utility Model Content

[0003] Therefore, it is necessary to provide a replaceable fastener that can be installed and removed from the webbing, has a stable structure, is not easily deformed or broken, does not require thickened crossbars, and can reduce the amount of material used, in order to address the above-mentioned shortcomings.

[0004] A replaceable fastener includes a connecting body and a crossbar. The connecting body includes a main body, a connecting part formed on the main body for connecting with another fastener or an external webbing, and two elastic cantilever arms fixed on the main body and arranged opposite each other. An installation space for inserting the crossbar is formed between the two elastic cantilever arms. The width of the end of the elastic cantilever arm is increased, and a limiting step is formed on each of the front and rear sides of the elastic cantilever arm. The crossbar includes a connecting arm for passing through the webbing and two limiting members fixed at the left and right ends of the connecting arm and corresponding to each elastic cantilever arm. The limiting member has a slot on the side facing away from the connecting arm that penetrates the upper and lower surfaces of the limiting member. The elastic cantilever arm is inserted into the slot, and the upper surface of the limiting member abuts against the two limiting steps on both sides of the corresponding slot.

[0005] In one embodiment, the elastic cantilever includes a vertical part fixedly connected to the main body and a horizontal part fixed to the top of the vertical part. The front and rear ends of the horizontal part protrude from the front and rear sides of the vertical part, respectively, and form a limiting step on the front and rear sides of the top of the vertical part. The dimension of the vertical part along the front-rear direction is smaller than the dimension of the main body along the front-rear direction. The vertical part is centrally located at the side edge of the main body, and two support platforms are formed on the main body on the front and rear sides of the vertical part, corresponding to each limiting step. A locking area is formed between each limiting step and the support platform below it.

[0006] In one embodiment, the limiting member includes a fixing plate fixedly connected to the end of the connecting arm, and two locking blocks disposed opposite to each other on one side of the fixing plate facing away from the connecting arm. The fixing plate and the two locking blocks together form the locking groove. The two locking blocks are inserted into two locking areas one by one, and the upper surface of the locking block abuts against the limiting step, and the lower surface of the locking block abuts against the support platform.

[0007] In one embodiment, the top of the horizontal part protrudes from the upper surface of the connecting arm and forms a gripping part; the upper surface of the fixing plate is higher than the upper surface of the connecting arm, and the connecting arm and the two fixing plates on both sides together form a webbing limiting area; the support platform is a concave arc surface, the shape of the lower surface of the card block is adapted to the shape of the support platform, and the upper surface of the card block is lower than the upper surface of the fixing plate.

[0008] In one embodiment, the connecting portion is a socket or resilient buckle that engages with another fastener; or

[0009] The main body has a U-shaped or V-shaped structure. The main body includes the connecting part for threading the webbing and two arms located on both sides of the connecting part. The two elastic cantilever arms are fixed to the top of the two arms respectively.

[0010] In one embodiment, the elastic cantilever bends toward the center of the mounting space.

[0011] In one embodiment, a support ramp is provided on the part of the fixing plate above the card block. The distance from the top of the support ramp to the middle of the connecting arm is less than the distance from the bottom of the support ramp to the middle of the connecting arm. The shape of the inner side of the horizontal part is adapted to the shape of the support ramp.

[0012] In one embodiment, the upper surface of the card block is an inclined surface, and the height of the upper surface of the card block gradually increases along the direction away from the connecting arm, and the shape of the limiting step is adapted to the shape of the inclined surface.

[0013] In one embodiment, the main body has a rectangular frame structure, including two horizontal arms arranged opposite each other and two vertical arms arranged opposite each other between the two horizontal arms. The two ends of one vertical arm are fixedly connected to one end of each of the two horizontal arms, and the two ends of the other vertical arm are fixedly connected to the other ends of each of the two horizontal arms. Two elastic cantilever arms are fixedly fixed to the two vertical arms one-to-one. The two horizontal arms of the main body form the connecting part for threading the webbing, or a horizontal arm is fixedly connected to the two vertical arms and parallel to the crossbar on the main body. The horizontal arm and the horizontal arm together form the connecting part for threading the webbing.

[0014] In one embodiment, the upper surface of the vertical arm has an installation notch that penetrates the inner and outer sides of the vertical arm. The elastic cantilever is housed in the installation notch and fixedly connected to the bottom surface of the installation notch. The dimension of the elastic cantilever along the left-right direction is smaller than the dimension of the vertical arm along the left-right direction. The dimension of the elastic cantilever along the front-back direction is smaller than the dimension of the installation notch along the front-back direction. The outer side of the elastic cantilever is flush with the outer side of the vertical arm.

[0015] The replaceable fastener of this utility model features a detachable crossbar mounted on the connecting body, with a limiting component on the crossbar and an elastic cantilever on the connecting body. This allows for a detachable connection between the webbing and the replaceable fastener, facilitating the assembly and disassembly of the webbing. Furthermore, the crossbar and connecting body are assembled without gaps, preventing the webbing from being pulled off the crossbar through any gaps, thus improving the stability of the connection. The upper surface of the limiting component abuts against the limiting step on the elastic cantilever, the inner wall of the limiting component's groove abuts against the front and rear sides of the elastic cantilever, and the bottom wall of the limiting component's groove corresponds to the inner side of the elastic cantilever. This allows for precise control of the crossbar and connecting body along the front-rear direction, left-right direction, and... The upper and lower lateral limiting ensures a stable and reliable connection between the crossbar and the connecting body. Each end of the connecting arm is connected to an elastic cantilever on the connecting body via a limiting component. Each limiting component abuts against two limiting steps, distributing the force acting on the connecting arm to multiple connection points. This ensures uniform force distribution at both ends of the connecting arm, preventing deformation or breakage at the connection between the crossbar and the connecting body due to uneven force distribution. This extends the service life of the replaceable fasteners. The stability of the connection between the crossbar and the connecting body and the reliability of the replaceable fastener structure can be guaranteed without thickening the crossbar, reducing the material usage and production cost of the replaceable fasteners. Attached Figure Description

[0016] Figure 1 This is a perspective view of the replaceable fastener in the engaged state in Embodiment 1 of this utility model;

[0017] Figure 2 This is a front view of the replaceable fastener in the engaged state in Embodiment 1 of this utility model;

[0018] Figure 3 This is a side view of the replaceable fastener in the engaged state in Embodiment 1 of this utility model;

[0019] Figure 4 This is a perspective view of the replaceable fastener in the open state in Embodiment 1 of this utility model;

[0020] Figure 5 This is a front view of the replaceable fastener in the open state in Embodiment 1 of this utility model;

[0021] Figure 6 This is a side view of the replaceable fastener in the open state in Embodiment 1 of this utility model;

[0022] Figure 7 A perspective view of the snap fastener using a single replaceable fastener according to Embodiment 1;

[0023] Figure 8 A perspective view of the snap fasteners using the two replaceable fasteners of Embodiment 1;

[0024] Figure 9 This is a perspective view of the replaceable fastener in the engaged state in Embodiment 2 of this utility model;

[0025] Figure 10 This is a perspective view of the replaceable fastener in the open state in Embodiment 2 of this utility model;

[0026] Figure 11 This is a perspective view of the replaceable fastener in the engaged state in Embodiment 3 of this utility model;

[0027] Figure 12 This is a perspective view of the replaceable fastener in the open state in Embodiment 3 of this utility model;

[0028] Figure 13 This is a perspective view of the replaceable fastener in the engaged state in Embodiment 4 of this utility model;

[0029] Figure 14 This is a perspective view of the replaceable fastener in the open state in Embodiment 4 of this utility model. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] Example 1

[0032] Please combine Figure 1-6This utility model discloses a replaceable fastener, which includes a connecting body 100 and a crossbar 200. The connecting body 100 and the crossbar 200 are detachably connected so that webbing can be threaded onto the crossbar 200 or the webbing on the crossbar 200 can be removed. The connecting body 100 includes a main body 110, a connecting part 120 formed on the main body 110 for connecting with another fastener or external webbing, and two elastic cantilever arms 130 fixed on the main body 110 and arranged opposite to each other. The connecting part 120 of the connecting body 100 is a structure on the replaceable fastener for connecting with other fasteners or webbing. In this embodiment, an installation space 140 for inserting a crossbar 200 is formed between the two elastic cantilever arms 130. The width of the end of the elastic cantilever arm 130 is increased, and a limiting step 131 is formed on each of the front and rear sides of the elastic cantilever arm 130. The crossbar 200 includes a connecting arm 210 for passing through the webbing and two limiting members 220 fixed to the left and right ends of the connecting arm 210 and corresponding to each elastic cantilever arm 130. The limiting member 220 has a slot 230 on the side facing away from the connecting arm 210 that penetrates the upper and lower surfaces of the limiting member 220. The elastic cantilever arm 130 is inserted into the slot 230, and the upper surface of the limiting member 220 abuts against the two limiting steps 131 on both sides of the corresponding slot 230. In this embodiment, the crossbar 200 is limited along the height direction of the replaceable fastener by the abutment between the limiting step 131 and the upper surface of the limiting member 220, ensuring the stability of the connection between the two in the height direction of the replaceable fastener. Furthermore, the slot 230 is designed to ensure that the limiting member 220 can be engaged with the two limiting steps 131 on the elastic cantilever 130 in a one-to-one correspondence. At the same time, the slot 230 divides the limiting member 220 into two parts located on both sides of the elastic cantilever 130, so that the two sides of the slot 230 can be embedded into the area below the two limiting steps 131. This allows the inner wall of the slot 230 to abut against the front and rear sides of the elastic cantilever 130, thus confining the elastic cantilever 130 within the slot 230 and preventing the crossbar 200 from moving relative to the connecting body 100 along the front and rear directions of the replaceable fastener. Furthermore, through the cooperation of the bottom wall of the slot 230 of the two limiting members 220 (i.e., the inner wall of the slot 230 facing away from the middle of the connecting arm 210) with the elastic cantilever 130, the crossbar 200 can be prevented from moving relative to the connecting body 100 along the left and right sides of the replaceable fastener (the width direction of the replaceable fastener) under the restriction of the elastic cantilever 130. In this way, by limiting the position between the crossbar 200 and the connecting body 100 in multiple directions, the stability of the connection between the two is improved while achieving multi-directional force distribution. The replaceable fastener bears weight evenly, and its overall product performance and durability are close to the structure of the crossbar and the fastener being integrally formed. In addition, the detachable design of the crossbar and the connecting body allows the damaged part to be replaced individually if one of the crossbar or the connecting body is damaged, which helps to reduce the use cost of the replaceable fastener.

[0033] In this embodiment, the front and rear directions refer to the thickness direction of the replaceable fastener, the left and right directions refer to the width direction of the replaceable fastener, the top and bottom directions refer to the height direction of the replaceable fastener, the front side refers to each face in the front view of the replaceable fastener, the rear side is the side facing away from the front side, and the upper surface is the side of each component facing away from the connecting part 120. In other embodiments, this explanation can also be used.

[0034] It should be noted that in this embodiment, the force exerted by the webbing on the crossbar 200 is distributed to the two limiting members 220, and further transmitted to the two limiting steps 131 connected to the limiting members 220. Thus, the force acting on the crossbar 200 is evenly distributed to the limiting members 220 that cooperate with the four limiting steps 131. This increases the number of connection points between the crossbar 200 and the connecting body 100, reducing the force on a single point on the crossbar 200, thereby avoiding the problem of the crossbar 200 breaking due to excessive localized force. Furthermore, the elastic cantilever 130 is made of a plastic material with a certain degree of elasticity. Thus, the elastic cantilever 130 can undergo elastic deformation when subjected to external force, allowing the end of the elastic cantilever 130 to be moved, causing the limiting members 220 to separate from the elastic cantilever 130.

[0035] In one embodiment, the elastic cantilever 130 includes a vertical portion 132 fixedly connected to the main body 110 and a horizontal portion 133 fixed to the top of the vertical portion 132. The front and rear ends of the horizontal portion 133 protrude from the front and rear sides of the vertical portion 132, respectively, and form a limiting step 131 on the front and rear sides of the top of the vertical portion 132. It can be understood that the elastic cantilever 130 in this embodiment has a T-shaped structure, with the vertical portion 132 and the horizontal portion 133 integrally formed to form a T-shaped tenon. In this way, the entire elastic cantilever 130 is symmetrically arranged, which makes the force on the part where the limiting member is connected to the elastic cantilever 130 more uniform when the webbing is subjected to force, thereby reducing wear. At the same time, the force is distributed on the horizontal portion, which can avoid stress concentration. The vertical portion 132 is smaller in size along the front-to-back direction than the main body portion 110. The vertical portion 132 is centrally located at the side edge of the main body portion 110. Two support platforms 111 are formed on the main body portion 110 at the front and rear sides of the vertical portion 132, corresponding to each limiting step 131. A locking area 134 is formed between each limiting step 131 and its lower support platform 111. In this embodiment, the area on the main body portion 110 corresponding to the vertical portion 132, the vertical portion 132, and the horizontal portion 133 together form an I-shaped structure. Each side of this I-shaped structure forms a locking area 134 for inserting into the side wall of the locking groove 230, allowing the insertion of the limiting member 220 and achieving the engagement between the limiting member 220 and the elastic cantilever 130. In addition, in this embodiment, by forming a support platform 111 below the limiting step 131, the movement of the crossbar 200 upward along the height direction of the replaceable fastener is restricted by the cooperation between the limiting step 131 and the upper surface of the limiting member 220, and the movement of the crossbar 200 downward along the height direction of the replaceable fastener is restricted by the cooperation between the support platform 111 and the lower surface of the limiting member 220, thus preventing the crossbar 200 from shifting relative to the connecting body 100 along the height direction of the replaceable fastener.

[0036] In this embodiment, the connecting part is an insertion hole or elastic buckle foot that engages with another fastener. That is, the replaceable fastener in this embodiment is used as a male or female buckle for a snap fastener. The connecting part and the elastic cantilever are located at both ends of the main body. This replaceable fastener needs to engage with another fastener to connect the two sections of webbing. Specifically, when the replaceable fastener is used as a female buckle for a snap fastener, the connecting part 120 is an insertion hole 121 that penetrates the two opposite sidewalls of the main body and forms a pressing notch 122 on both sides of the main body (e.g., ...). Figure 7As shown, when the replaceable fastener is engaged with another external fastener (male fastener), the two elastic buckle feet of the male fastener pass through the insertion hole and are inserted into the two pressing notches 122 one by one. The elastic buckle feet have shoulders that abut against the lower edge of the pressing notches 122. Thus, through the mutual constraint of the pressing notches 122 and the elastic buckle feet, the replaceable fastener and the external fastener can be connected. When the replaceable fastener is a male snap fastener, two elastic buckle feet are arranged opposite each other on the end of the main body 110 facing away from the elastic cantilever 130. The two elastic buckle feet together form the connecting part 120 of the replaceable fastener. The elastic buckle feet have shoulders that limit the engagement with the pressing notch 122 of another external fastener (female fastener). Of course, the connecting part 120 of the replaceable fastener can also be connected with the plug-in structure of other male or female snap fasteners on the market. The specific structural form of the connecting part 120 is not covered by this solution.

[0037] In addition, in the snap fastener, either the male or female snap fastener can adopt the quick-release structure of this embodiment (e.g., Figure 7 As shown), at this time, only the crossbar of one of the male and female buckles is detachable, meaning that only the webbing at one end of the buckle can be removed and installed. Alternatively, both the male and female buckles can use the replaceable fasteners of this embodiment, meaning that both the male and female buckles are equipped with detachable crossbars, and the webbing at both ends of the buckle can be removed and installed (e.g., Figure 8 (As shown).

[0038] In one embodiment, the limiting member 220 includes a fixing plate 221 fixedly connected to the end of the connecting arm 210, and two locking blocks 222 disposed opposite to each other on one side of the fixing plate 221 facing away from the connecting arm 210. The fixing plate 221 and the two locking blocks 222 together form a locking groove 230. That is, one locking block 222 is located on the front side of the fixing plate 221, and the other locking block 222 is located on the rear side of the fixing plate 221. The two locking blocks 222 are inserted into the two locking areas 134 one-to-one, and the upper surface of the locking block 222 abuts against the limiting step 131, the lower surface of the locking block 222 abuts against the support platform 111, and the inner side of the locking block 222 (i.e. the side of the locking block 222 located in the locking groove 230) abuts against the front or rear side of the vertical part 132, thereby realizing the multi-directional locking of the limiting member 220 and the elastic cantilever 130. In this embodiment, the upper surface of the fixing plate 221 is higher than the upper surface of the connecting arm 210. The connecting arm 210 and the two fixing plates 221 on both sides together form a webbing limiting area to prevent the webbing threaded on the connecting arm 210 from shifting laterally, thereby achieving the positioning of the webbing.

[0039] In this embodiment, the elastic cantilever 130 is bent towards the center of the mounting space 140, so that the distance between the top ends of the two elastic cantilever 130s is less than the width of the rest of the mounting space 140 (i.e., the dimension of the mounting space 140 along the left and right sides of the replaceable fastener). A portion of the inner side of the elastic cantilever 130 (i.e., the side of the elastic cantilever 130 located in the mounting space 140) abuts against the upper surface of the connecting arm 210 or the upper surface of the limiting member 220. Thus, by pressing the crossbar 200 with the inner side of the elastic cantilever 130, the crossbar 200 can be further limited along the height direction of the replaceable fastener. This increases the number of connection points between the crossbar 200 and the connecting body 100 in the height direction of the replaceable fastener, further improving the stability of the connection between the crossbar 200 and the connecting body 100 in the height direction of the replaceable fastener.

[0040] In this embodiment, by bending the elastic cantilever 130 towards the center of the installation space 140, while restricting the position of the crossbar 200 through the inner side of the elastic cantilever 130, the design of the bending structure allows the elastic cantilever 130 to undergo a large deformation under the action of external force (such as a pulling force in the direction away from the installation space 140 and along the left and right sides of the replaceable fastener). This allows the elastic cantilever 130 to undergo a large deformation when the user pulls the end of the elastic cantilever 130 in the direction away from the installation space 140, so that the limiting member 220 can separate from the limiting step 131, thereby releasing the constraint of the limiting step 131 on the limiting member 220 and the constraint of the side wall of the slot 230 on the elastic cantilever 130, thereby removing the crossbar 200 from the connecting body 100 and reducing the difficulty of separating the crossbar 200 from the connecting body 100.

[0041] In this embodiment, the top of the vertical portion 132 is tilted away from the mounting space 140, and the top of the horizontal portion 133 is tilted towards the mounting space 140. Furthermore, the angle between the horizontal portion 133 and the connecting body 100 in the height direction is greater than the angle between the vertical portion 132 and the connecting body 100 in the height direction. Preferably, the angle between the horizontal portion 133 and the connecting body 100 in the height direction is 15-30°, and the angle between the vertical portion 132 and the connecting body 100 in the height direction is 5-10°. In this embodiment, the top of the vertical portion 132 is tilted away from the installation space 140, and the top of the horizontal portion 133 is tilted towards the installation space 140. This allows the elastic cantilever 130 to deform significantly with only a small pulling force applied to its end, enabling the limiting step 131 to separate from the limiting member 220. This avoids the problem of the elastic cantilever 130 breaking at its end due to excessive pulling when separating the horizontal bar 200 and the connecting body 100, thus extending the service life of the replaceable fastener. Furthermore, by making the angle between the horizontal portion 133 and the connecting body 100 in the height direction greater than the angle between the vertical portion 132 and the connecting body 100 in the height direction, the force transmitted from the webbing to the horizontal bar 200 when subjected to external tension can be partially transmitted to the inner surface of the horizontal portion 133, further reducing the force on the mating area between the limiting step 131 and the upper surface of the limiting member 220. Furthermore, the top of the horizontal part 133 protrudes from the upper surface of the connecting arm 210 and forms a gripping part. In this way, the user only needs to pull the end of the elastic cantilever 130 away from the limiting member 220 by pressing the gripping part, so as to release the constraint of the limiting step 131 on the limiting member 220.

[0042] Furthermore, the height of the upper surface of the locking block 222 is lower than the height of the upper surface of the fixing plate 221. The fixing plate 221 is provided with a supporting inclined surface 223 above the locking block 222. The distance from the top of the supporting inclined surface 223 to the middle of the connecting arm 210 is less than the distance from the bottom of the supporting inclined surface 223 to the middle of the connecting arm 210. The shape of the inner side of the horizontal part 133 is adapted to the shape of the supporting inclined surface 223. That is to say, the inner side of the horizontal part 133 is also an inclined surface that fits with the supporting inclined surface 223. In this embodiment, by setting the support slope 223, the inner side of the horizontal part 133 is supported, and the horizontal part 133 limits the horizontal bar 200 along the height direction of the replaceable fastener. At the same time, the movement of the elastic cantilever 130 toward the middle of the connecting arm 210 is restricted. That is, the inner side of the horizontal part 133 is positioned to prevent the vertical part 132 from excessively squeezing the fixing plate 221 and to reduce the force exerted by the connecting body 100 on the horizontal bar 200 along the width direction of the replaceable fastener when the horizontal bar 200 is assembled with the connecting body 100.

[0043] The upper surface of the locking block 222 is an inclined surface 224, and the height of the upper surface of the locking block 222 gradually increases along the direction away from the connecting arm 210. The shape of the limiting step 131 is adapted to the shape of the inclined surface 224, that is, the limiting step 131 is also an inclined surface that fits against the inclined surface 224. In this way, through the contact between the upper surface of the locking block 222 and the limiting step 131, on the one hand, the horizontal bar 200 and the connecting body 100 are limited along the height direction of the replaceable fastener. On the other hand, the setting of the inclined surface 224 also realizes the positioning of the horizontal bar 200 and the connecting body 100 along the width direction of the replaceable fastener. Thus, if the elastic cantilever 130 is pulled directly along the width direction of the replaceable fastener (assuming that the deformation of the elastic cantilever 130 is large, and deformation can occur under the horizontal tension acting on the non-end of the elastic cantilever 130), the elastic cantilever 130 will always maintain its engagement with the limiting member 220 under the mutual constraint of the inclined surface 224 and the inclined surface. When the user moves the end of the elastic cantilever 130, the horizontal part 133 and the vertical part 132 of the elastic cantilever 130 simultaneously deflect and deform relative to the main body 110, so that the limiting step 131 moves away from the upper surface of the locking block 222 in a rotating manner, thus releasing the constraint between the limiting step 131 and the upper surface of the locking block 222, which can further improve the stability of the connection between the crossbar 200 and the connecting body 100.

[0044] In this embodiment, the support platform 111 has a concave arc surface, and the shape of the lower surface of the locking block 222 is adapted to the shape of the support platform 111. That is, the lower surface of the locking block 222 is a convex arc surface that mates with the concave arc surface, so as to reduce the scraping and impact of the lower surface of the locking block 222 on the support platform 111 when the crossbar 200 is assembled with the connecting body 100. In addition, the dimension of the locking block 222 in the left and right directions gradually increases from the bottom of the locking block 222 to the top of the locking block 222. This can be understood as follows: the locking block 222 has a right-angled trapezoidal structure, and the side of the locking block 222 facing away from the fixing plate 221 is inclined. This allows the side of the locking block 222 facing away from the fixing plate 221 to be flush with the outer side of the vertical part 132 (i.e., the side of the vertical part 132 facing away from the installation space 140) after the crossbar 200 is assembled with the connecting body 100, improving the overall aesthetics of the replaceable fastener and preventing scratches to people or objects caused by the locking block 222 protruding from the outer side of the vertical part 132. On the other hand, it ensures that the upper part of the locking block 222 has a large contact area with the limiting step 131, improving the strength of the mating part between the locking block 222 and the limiting step 131. This prevents the locking block 222 from being pulled apart or deformed when the webbing is subjected to increased force, thereby improving the structural strength of the replaceable fastener and extending its service life.

[0045] In one embodiment, the lower surface of the connecting arm 210 is a convex arc surface, and the height of the middle part of the lower surface of the connecting arm 210 is lower than the height of the rest of the connecting arm 210. Since the bending moment at the middle of the crossbar 200, when the webbing is connected to the elastic cantilever 130 on both sides, is greater than the bending moment at the end of the crossbar 200 when the webbing is subjected to external tension, in this embodiment, making the lower surface of the connecting arm 210 a convex arc surface, so that the height of the middle part of the connecting arm 210 is greater than the height of the rest of the connecting arm 210, can improve the strength of the middle part of the connecting arm 210, prevent the middle part of the connecting arm 210 from breaking, and extend the service life of the crossbar 200. Weight-reducing grooves 211 are provided on both the front and rear sides of the connecting arm 210. Thus, while increasing the height of the middle part of the connecting arm 210 and improving the strength of the crossbar 200, the material usage of the crossbar 200 and even the entire replaceable fastener can be reduced, further reducing the production cost of the replaceable fastener.

[0046] It should be noted that in this embodiment, the connecting arm 210, the fixing plate 221, and the locking block 222 are integrally formed. The part where the connecting arm 210 connects to the fixing plate 221 is provided with an arc-shaped thickened reinforcement area to improve the strength of the connection between the connecting arm 210 and the fixing plate 221. The elastic cantilever 130 is integrally formed with the main body 110 to improve the stability of the connection between the elastic cantilever 130 and the main body 110.

[0047] Example 2

[0048] Please combine Figure 9-10 The difference between this embodiment and Embodiment 1 is that in this embodiment, the main body 110 has a U-shaped or V-shaped structure, and the entire replaceable fastener forms a D-shaped buckle structure. The main body 110 includes a connecting part 120 for threading the webbing and two arms located on both sides of the connecting part 120. Two elastic cantilever arms 130 are fixed to the top ends of the two arms, that is, the connecting part is located at the lower end of the two elastic cantilever arms. In this way, when the replaceable fastener is connected to the webbing, the replaceable fastener itself constitutes a detachable or latchable connecting buckle, thereby realizing the connection of the two webbing sections. The structure of the elastic cantilever arm 130 and the crossbar in this embodiment are exactly the same as those in Embodiment 1. For details, please refer to the description of the elastic cantilever arm 130 and the crossbar structure and their effects in Embodiment 1, which will not be repeated here.

[0049] Example 3

[0050] Please combine Figure 11-12The difference between this embodiment and Embodiment 1 is that in this embodiment, the main body 110 has a rectangular frame structure. The main body 110 includes two horizontal arms 112 arranged opposite each other and two vertical arms 113 arranged opposite each other between the two horizontal arms 112. The two ends of one vertical arm 113 are fixedly connected to one end of each of the two horizontal arms 112, and the two ends of the other vertical arm 113 are fixedly connected to the other ends of each of the two horizontal arms 112. Two elastic cantilever arms are fixedly fixed to the two vertical arms 113 one-to-one. It can also be understood that when the wide surface of the entire main body is attached to the vertical plane, the elastic cantilever arms and horizontal bars are arranged on the front or rear side of the main body. Furthermore, the two horizontal arms 112 of the main body form a connecting part for threading the webbing. Of course, according to the threading requirements of the webbing, the webbing can also be fixedly threaded onto one horizontal arm. That is to say, the entire replaceable fastener forms a H-shaped buckle. In this embodiment, the upper surface of the vertical arm 113 has an installation notch 114 that penetrates the inner and outer sides of the vertical arm. The elastic cantilever 130 is housed within the installation notch 114 and fixedly connected to the bottom surface of the installation notch 114. The dimension of the elastic cantilever 130 in the left-right direction is smaller than that of the vertical arm 113 in the left-right direction, and the dimension of the elastic cantilever 130 in the front-back direction is smaller than that of the installation notch 114 in the front-back direction. Furthermore, the outer side of the elastic cantilever 130 (the side of the elastic cantilever facing away from the center of the main body) is flush with the outer side of the vertical arm 113. That is, there is a gap between the elastic cantilever and the inner wall of the installation notch so that the elastic cantilever can be moved under external force to release the constraint on the crossbar 220. By making the dimension of the elastic cantilever 130 in the left-right direction smaller than that of the vertical arm 113 in the left-right direction, and making the outer side of the elastic cantilever 130 flush with the outer side of the vertical arm 113, a step can be formed on the inner side of the installation notch to support the fixing plate and prevent the connection between the fixing plate and the clip from breaking due to overload.

[0051] The structure of the elastic cantilever 130 and the crossbar in this embodiment are exactly the same as those in Embodiment 1. For details, please refer to the description of the elastic cantilever 130 and the crossbar structure and their effects in Embodiment 1. Of course, depending on the elastic performance of the elastic cantilever, the elastic cantilever can also be designed as a T-shaped plate structure (i.e., without bending the elastic cantilever) while ensuring that the elastic cantilever is easy to move. This will not be elaborated here.

[0052] Example 4

[0053] Please combine Figure 13-14 The difference between this embodiment and embodiment 3 is that a horizontal arm 115, which is fixedly connected to the two vertical arms 113 and parallel to the crossbar 200, is fixed on the main body 110. The horizontal arm 115 and a cross arm 112 together form a connecting part for threading the webbing. In other words, the entire replaceable fastener forms a ladder-shaped connecting buckle.

[0054] The structure of the elastic cantilever 130 and the crossbar in this embodiment are exactly the same as those in Embodiment 1. For details, please refer to the description of the elastic cantilever 130 and the crossbar structure and their effects in Embodiment 1. Of course, depending on the elastic performance of the elastic cantilever, the elastic cantilever can also be designed as a T-shaped plate structure (i.e., without bending the elastic cantilever) while ensuring that the elastic cantilever is easy to move. This will not be elaborated here.

[0055] The aforementioned replaceable fastener allows for the detachable installation of a crossbar 200 on the connecting body 100. A limiting member 220 is provided on the crossbar 200, and an elastic cantilever 130 is provided on the connecting body 100. This design facilitates the detachable connection between the webbing and the replaceable fastener, making webbing easy to install and remove. Furthermore, the crossbar 200 and connecting body 100 are assembled without any gaps, preventing the webbing from being pulled off the crossbar 200 through any gaps, thus improving the stability of the connection between the webbing and the crossbar 200. The upper surface of the limiting member 220 abuts against the limiting step 131 on the elastic cantilever 130; the inner wall of the slot 230 of the limiting member 220 abuts against the front and rear sides of the elastic cantilever 130; and the bottom wall of the slot 230 of the limiting member 220 corresponds to the inner side of the elastic cantilever 130. This allows for the control of the crossbar 200 and the connecting body 100 along the front-to-back and left-to-right directions. Lateral and vertical limiting ensures stable and reliable connection between the crossbar 200 and the connecting body 100. Each end of the connecting arm 210 is connected to the elastic cantilever 130 on the connecting body 100 via a limiting member 220. Each limiting member 220 abuts against two limiting steps 131, distributing the force acting on the connecting arm 210 to multiple connection points. This ensures uniform force distribution at both ends of the connecting arm 210, preventing deformation or breakage at the connection between the crossbar 200 and the connecting body 100 due to uneven force distribution. This extends the service life of the replaceable fastener. The stability of the connection between the crossbar 200 and the connecting body 100 and the reliability of the replaceable fastener structure can be guaranteed without thickening the crossbar 200, reducing the material usage and production cost of the replaceable fastener.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A replaceable fastener, characterized in that, The device includes a connecting body and a crossbar. The connecting body includes a main body, a connecting part formed on the main body for connecting with another fastener or external webbing, and two elastic cantilever arms fixed on the main body and arranged opposite each other. An installation space for inserting the crossbar is formed between the two elastic cantilever arms. The width of the end of the elastic cantilever arm is increased and a limiting step is formed on each of the front and rear sides of the elastic cantilever arm. The crossbar includes a connecting arm for passing through the webbing and two limiting members fixed at the left and right ends of the connecting arm and corresponding to each elastic cantilever arm. The limiting member has a slot on the side facing away from the connecting arm that penetrates the upper and lower surfaces of the limiting member. The elastic cantilever arm is inserted into the slot, and the upper surface of the limiting member abuts against the two limiting steps on both sides of the corresponding slot.

2. The replaceable fastener according to claim 1, characterized in that, The elastic cantilever includes a vertical part fixedly connected to the main body and a horizontal part fixed to the top of the vertical part. The front and rear ends of the horizontal part protrude from the front and rear sides of the vertical part, respectively, and form a limiting step on the front and rear sides of the top of the vertical part. The dimension of the vertical part along the front and rear side direction is smaller than the dimension of the main body along the front and rear side direction. The vertical part is centrally located at the side edge of the main body, and two support platforms are formed on the main body on the front and rear sides of the vertical part, corresponding to each limiting step. A locking area is formed between each limiting step and the support platform below it.

3. The replaceable fastener according to claim 2, characterized in that, The limiting component includes a fixing plate fixedly connected to the end of the connecting arm and two locking blocks disposed opposite to each other on one side of the fixing plate facing away from the connecting arm. The fixing plate and the two locking blocks together form the locking groove. The two locking blocks are inserted into two locking areas one by one, and the upper surface of the locking block abuts against the limiting step, and the lower surface of the locking block abuts against the support platform.

4. The replaceable fastener according to claim 3, characterized in that, The top of the horizontal part protrudes from the upper surface of the connecting arm and forms a gripping part; the upper surface of the fixing plate is higher than the upper surface of the connecting arm, and the connecting arm and the two fixing plates on both sides together form a webbing limiting area; the support platform is a concave arc surface, the shape of the lower surface of the card block is adapted to the shape of the support platform, and the upper surface of the card block is lower than the upper surface of the fixing plate.

5. The replaceable fastener according to claim 4, characterized in that, The connecting part is a socket or elastic buckle that engages with another fastener; or The main body has a U-shaped or V-shaped structure. The main body includes the connecting part for threading the webbing and two arms located on both sides of the connecting part. The two elastic cantilever arms are fixed to the top of the two arms respectively.

6. The replaceable fastener according to claim 5, characterized in that, The elastic cantilever bends toward the center of the installation space.

7. The replaceable fastener according to claim 6, characterized in that, The fixed plate has a support slope above the card block. The distance from the top of the support slope to the middle of the connecting arm is less than the distance from the bottom of the support slope to the middle of the connecting arm. The shape of the inner side of the horizontal part is adapted to the shape of the support slope.

8. The replaceable fastener according to claim 3, characterized in that, The upper surface of the locking block is an inclined surface, and the height of the upper surface of the locking block gradually increases along the direction away from the connecting arm. The shape of the limiting step is adapted to the shape of the inclined surface.

9. The replaceable fastener according to claim 4, characterized in that, The main body has a rectangular frame structure, including two horizontal arms arranged opposite each other and two vertical arms arranged opposite each other between the two horizontal arms. The two ends of one vertical arm are fixedly connected to one end of each of the two horizontal arms, and the two ends of the other vertical arm are fixedly connected to the other ends of each of the two horizontal arms. Two elastic cantilever arms are fixedly fixed to the two vertical arms one-to-one. The two horizontal arms of the main body form the connecting part for threading the webbing, or a horizontal arm is fixed on the main body and is fixedly connected to the two vertical arms and parallel to the horizontal bar. The horizontal arm and the horizontal arm together form the connecting part for threading the webbing.

10. The replaceable fastener according to claim 9, characterized in that, The upper surface of the vertical arm has an installation notch that penetrates the inner and outer sides of the vertical arm. The elastic cantilever is housed in the installation notch and is fixedly connected to the bottom surface of the installation notch. The dimension of the elastic cantilever along the left and right sides is smaller than the dimension of the vertical arm along the left and right sides. The dimension of the elastic cantilever along the front and back sides is smaller than the dimension of the installation notch along the front and back sides. The outer side of the elastic cantilever is flush with the outer side of the vertical arm.

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