Plastic article of a multifunctional buckle

Abstract

The utility model relates to the technical field of plastic connecting piece discloses a plastic product of multifunctional buckle. The product includes the casing and the fixed band that cooperates and connects with the casing. The casing is equipped with the positioning mechanism, and the positioning mechanism includes the bottom block fixed in the square groove of casing, the pressing block through bolt rotation connection on the bottom block and the spring that provides the pre -tightening force. The fixed column is fixed in one end of pressing block, and the auxiliary assembly with round groove is equipped on the bottom block. The through -hole is set up on the fixed band, and the fixed column is inserted in the through -hole under the action of spring and passes through the round groove and realizes the locking. In addition, the casing is made by the composite mechanism injection molding including polypropylene, toughening agent, filling agent and color master batch. The utility model solves the problem that the fixed band is easy to slip off through the lever type mechanical plug -in structure, realizes firm connection, and effectively improves the low temperature toughness and mechanical strength of the casing through the composite material formula simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of plastic connector technology, and in particular to a multifunctional snap-fit ​​plastic product. Background Technology

[0002] In everyday life and outdoor gear, plastic clips are widely used as basic connecting accessories in backpacks, suitcases, tents, and various binding straps. The main function of these products is to connect flexible straps to rigid shells or bases, achieving the purpose of binding, suspending, or connecting objects by adjusting the length or tension of the straps.

[0003] However, existing plastic buckles, when used with securing straps, mostly employ a simple interlocking and wrapping method, relying primarily on the friction between the securing strap and the buckle crossbar, as well as the tension of the securing strap itself, to achieve anti-reverse and fixation. This traditional connection method can maintain fixation under static or low-stress conditions, but in actual use, especially when equipment is subjected to severe vibration, repeated pulling, or sudden changes in force direction, the friction between the contact surface of the securing strap and the buckle is often insufficient to resist external tension.

[0004] Once friction fails, the securing strap can easily slip within the buckle, causing it to become longer than originally adjusted, loosen, and in severe cases, even slip completely off the buckle, resulting in a broken connection. This unstable connection not only affects the user's normal experience but, in scenarios where high connection reliability is required, can also lead to items falling or safety accidents due to connection failure. Therefore, improving the stability of the connection between the securing strap and the buckle to prevent accidental slippage has become a pressing technical problem to be solved in this field.

[0005] Therefore, this utility model proposes a multifunctional buckle plastic product to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing technology, such as the fact that the connection between the fixing strap and the shell of the multi-functional buckle plastic product mainly relies on friction, which is prone to loosening and slippage under vibration or stress changes, leading to connection failure, and that conventional plastic shell materials are prone to brittle fracture due to insufficient toughness under low temperature or high impact environments, resulting in low reliability, this utility model aims to provide a multi-functional buckle plastic product with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a multifunctional buckle plastic product, including: a housing, a fixing strap that cooperates with and connects to the housing, and a positioning mechanism disposed on the housing.

[0008] The positioning mechanism has a mechanical lever-type locking structure, which specifically includes a base block fixedly connected to the housing, a pressing block rotatably connected to the base block by bolts, and a spring connected between the base block and the pressing block.

[0009] Furthermore, the surface of the housing is recessed inward to form a square groove, and the bottom block is fixedly connected to the inner wall or bottom of the square groove. Part of the structure of the pressing block extends outside the square groove. A fixing post is fixedly connected to one end of the pressing block facing the fixing band. An auxiliary component is fixedly provided on the bottom block, and a circular groove for the fixing post to pass through is opened on the auxiliary component. A through hole is opened on the fixing band to cooperate with the fixing post. The end of the fixing post away from the pressing block passes through the circular groove and is inserted into the through hole. Through this mechanical insertion connection method, the fixing band is locked to the housing.

[0010] Preferably, the pressing block is divided into a pressing end and a locking end with the bolt as the fulcrum. The bolt is located between the pressing end and the locking end. The fixing column is vertically fixed to the lower surface of the locking end, and the lifting and lowering control of the fixing column is realized through the lever principle.

[0011] Preferably, the spring is located on the side of the bolt near the pressing end, one end of the spring is fixedly connected to the inner side of the pressing block, and the other end of the spring is fixedly connected to the upper surface of the base block. The spring is in a compressed state to provide preload force, ensuring that the fixing post always remains in the inserted and locked state when not in operation.

[0012] Preferably, the auxiliary component is an arched or U-shaped structure extending outward from the base block. Both ends of the auxiliary component are fixedly connected to the base block. The circular groove is opened at the top of the auxiliary component and extends vertically through it to limit the displacement path of the fixed column and share the shear force.

[0013] Preferably, the shell is injection molded from a composite structure, which includes polypropylene, toughening agent, filler and color masterbatch, and the physical properties of the shell are improved through the combination of multiple components.

[0014] Preferably, the polypropylene serves as the base material layer of the shell, and the toughening agent is uniformly distributed within the polypropylene to form a toughening phase, thereby preventing the shell from becoming brittle in low-temperature environments.

[0015] Preferably, the filler is filled in the gaps of the polypropylene, the filler is made of glass fiber, and the color masterbatch is attached to the shell and mixed in the polypropylene to provide appearance color and enhance structural strength without changing the mechanical properties of the substrate.

[0016] Preferably, the cross-section of the shell presents a multi-layered composite structure composed of the polypropylene, the toughening agent, the filler, and the color masterbatch, thereby enabling the shell to simultaneously possess high strength, high toughness, and weather resistance.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problem in the prior art that the connection between the fixing strap and the housing is fixed by friction and is prone to accidental slippage due to vibration or force. It achieves the technical effect of stable and reliable connection, convenient operation and significantly improved anti-slip performance.

[0019] 2. This utility model solves the problems of traditional single plastic material buckles being prone to brittle fracture at low temperatures and insufficient strength and easy deformation at high temperatures or high loads by using a composite material formula consisting of polypropylene, toughening agent, filler and color masterbatch to make the shell. It achieves the technical effect of making the shell have excellent low temperature toughness, high mechanical strength and good heat resistance, thus adapting to complex outdoor environments and extending service life.

[0020] 3. This utility model solves the problems of the fixed column being prone to displacement during the resetting process, resulting in inaccurate insertion into the through hole, and the fixed column being prone to breakage due to excessive shear stress at the root after locking, by setting an auxiliary component with a circular groove on the bottom block. It achieves the technical effect of providing precise guidance and positioning for the fixed column, and sharing the lateral load and protecting the integrity of the internal locking structure when under force. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a multifunctional buckle plastic product proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the shell structure of a multifunctional snap-on plastic product proposed in this utility model;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0025] Legend:

[0026] 1. Shell;

[0027] 2. Positioning mechanism; 21. Base block; 22. Bolt; 23. Pressing block; 24. Spring; 25. Square groove; 26. Fixing post;

[0028] 27. Auxiliary component; 271. Circular groove; 272. Through hole;

[0029] 3. Composite structure; 31. Polypropylene; 32. Toughening agent; 33. Filler; 34. Masterbatch;

[0030] 4. Fixing strap. Detailed Implementation

[0031] Example:

[0032] Reference Figures 1 to 4 This utility model provides a multifunctional buckle plastic product, which aims to solve the problems in the prior art where the fixing strap is easy to slip off when connected to the housing 1, resulting in an unstable connection, and the structural defects of conventional plastic housing 1 that are prone to brittleness or insufficient strength under low temperature or impact conditions.

[0033] like Figure 1 and Figure 2 As shown, the main structure of the multifunctional buckle plastic product includes a housing 1 as an integral support platform, and a fixing strap 4 connected to one side of the housing 1. The housing 1 serves as the mounting base and load-bearing body of the entire device, providing installation space for various functional components and protecting the internal structure. The fixing strap 4 is used to lock objects for connecting or binding objects. In order to prevent the fixing strap 4 from accidentally detaching from the housing 1 under stress, a positioning mechanism 2 is specially provided on the housing 1 for mechanically locking and limiting the fixing strap 4.

[0034] Specific combination Figure 2 and Figure 3 As shown in the structural details, the surface of the housing 1 is recessed inward to form a square groove 25. The square groove 25 provides a space for the positioning mechanism 2 to reduce the overall bulkiness and protect the internal components. The core components of the positioning mechanism 2 include a base block 21 fixedly connected to the housing 1, a pressing block 23 movably connected to the base block 21 via a mechanical structure, and a spring 24 connecting the base block 21 and the pressing block 23. The base block 21 is fixedly connected to the inner bottom wall or inner side wall of the square groove 25 by integral injection molding, serving as the fixed fulcrum of the entire positioning mechanism 2. The pressing block 23 is rotatably connected to the base block 21 by bolts 22, allowing the pressing block 23 to swing back and forth around the axis of the bolts 22 in a lever-like manner, thereby switching between the unlocked and locked states. Part of the structure of the pressing block 23 extends outside the square groove 25 to facilitate the operator's pressing operation.

[0035] To achieve reliable physical engagement, a fixing post 26 is fixedly connected to the end of the pressing block 23 facing the fixing band 4. An auxiliary component 27 is fixedly installed on the bottom block 21. The auxiliary component 27 has a circular groove 271 for the fixing post 26 to pass through. At the same time, the fixing band 4 has a through hole 272 that mates with the fixing post 26. The end of the fixing post 26 away from the pressing block 23 is designed to pass through the circular groove 271 and be inserted into the through hole 272. When the fixing post 26 is inserted into the through hole 272, the fixing band 4 is locked to the housing 1 and cannot slide relative to it. The auxiliary component 27 plays a guiding role and enhances the shear resistance during this process, ensuring that the fixing post 26 will not shift or break when subjected to force.

[0036] Reference Figure 3 In a specific implementation of the positioning mechanism 2, the pressing block 23 is divided into a pressing end and a locking end with the bolt 22 as the fulcrum. The bolt 22 is located between the pressing end and the locking end and acts as the rotation axis. The fixing post 26 is vertically fixed to the lower surface of the locking end to facilitate downward insertion for locking. In order to ensure that the mechanism is always in a locked and safe state when not subjected to external force, the spring 24 is set on the side of the bolt 22 near the pressing end. One end of the spring 24 is fixedly connected to the inner side of the pressing block 23, and the other end is fixedly connected to the upper surface of the bottom block 21. The spring 24 is in a compressed state to provide a continuous preload. The preload is transmitted to the locking end through the lever principle, forcing the fixing post 26 to maintain the tendency to insert downward into the through hole 272, thereby preventing the fixing band 4 from loosening due to vibration or accidental contact.

[0037] Meanwhile, the auxiliary component 27 is designed as a circular structure. The two ends of the auxiliary component 27 are fixedly connected to the base block 21 to form a stable frame. The circular groove 271 is opened on the top of the auxiliary component 27 and runs through it in the vertical direction. The structure is not only used to guide the fixing post 26 to accurately enter the through hole 272, but more importantly, when the fixing band 4 is subjected to tension, the auxiliary component 27 can share part of the shear force, protect the fixing post 26 from being broken, and thus improve the impact resistance of the overall structure.

[0038] Reference Figure 4In this embodiment, the shell 1 undergoes a special composite modification design at the material level. The shell 1 is injection molded by a composite structure 3, which includes polypropylene 31 as the base material, toughening agent 32 for improving low-temperature toughness, filler 33 for enhancing strength, and color masterbatch 34 for providing a specific appearance color. Polypropylene 31 constitutes the matrix of the shell 1, giving the shell good chemical corrosion resistance and processability. Toughening agent 32 is dispersed in the polypropylene 31 matrix to form a toughening phase, which can effectively absorb impact energy and prevent the shell 1 from cracking at low temperatures. Filler 33 is uniformly mixed in polypropylene 31, using materials such as glass fiber or talc to significantly improve the heat distortion temperature and mechanical strength of the shell 1. Color masterbatch 34 is mixed and distributed on the surface or in the overall structure of the composite structure 3, and the amount of color masterbatch 34 added is controlled within the range that does not change the physical and mechanical properties of polypropylene 31. Through this multi-level material composite, the shell 1 can meet mechanical locking requirements while possessing excellent environmental adaptability.

[0039] As a preferred embodiment, in order to ensure the comfort of the pressing operation and prevent accidental touch, the pressing end surface of the pressing block 23 outside the square groove 25 is provided with an anti-slip texture or groove structure. The anti-slip texture is integrally formed with the pressing block 23 by injection molding, which can increase the friction between the finger and the pressing block 23, so that the unlocking operation can be performed accurately even when wearing gloves or with wet hands. At the same time, the edges of the pressing block 23 are chamfered to avoid sharp edges scratching the user or snagging clothing.

[0040] As another preferred embodiment, in order to improve the stability of the connection between the bottom block 21 and the housing 1, the connection surface between the bottom block 21 and the square groove 25 adopts a reinforcing rib structure design. The reinforcing ribs are distributed along the force direction, which can effectively disperse the stress generated during the pressing operation and prevent the bottom block 21 from falling off the housing 1 due to long-term fatigue. In addition, the end of the bolt 22 is provided with an anti-loosening structure, such as a self-locking nut or a riveted end, to ensure that the bolt 22 will not loosen or fall off during frequent rotation, thereby ensuring the long-term reliability of the positioning mechanism 2.

[0041] As a further preferred embodiment of the material formulation, in order to adapt to extreme outdoor environments, the toughening agent 32 is specifically selected from ethylene-octene copolymer or ethylene propylene diene monomer (EPDM) rubber. These two materials have excellent elasticity retention at low temperatures, which can significantly improve the low-temperature impact strength of polypropylene 31. The filler 33 is specifically selected from short glass fibers with a length of 3-6 mm, and is surface treated with a silane coupling agent to enhance its interfacial bonding with the polypropylene 31 matrix, thereby greatly improving the tensile strength and modulus of the shell 1 and preventing the shell 1 from deforming or breaking under high load.

[0042] As a preferred embodiment of visual recognition, the color masterbatch 34 uses highly weather-resistant pigments and is fully dispersed in the substrate by a twin-screw extruder, so that the shell 1 has a bright warning color or camouflage color to adapt to different usage scenarios. For example, high-visibility orange is used in rescue equipment, or low-visibility matte black is used in military equipment. The color masterbatch 34 also has anti-ultraviolet function, which can prevent the shell 1 from fading or powdering under long-term sun exposure.

[0043] The working principle is as follows:

[0044] When a locking operation is required, the user inserts the fixing strap 4 into the predetermined position of the housing 1. During the insertion process, if the position of the fixing strap 4 needs to be adjusted, the user needs to press down on one end of the pressing block 23 located outside the square groove 25. At this time, the pressing block 23 rotates around the bolt 22, overcoming the elastic force of the spring 24, so that the locking end of the other end of the pressing block 23 is lifted upward, causing the fixing post 26 to move upward and disengage from the circular groove 271 area of ​​the auxiliary component 27, thereby making room for the insertion of the fixing strap 4.

[0045] When the fixing strap 4 is adjusted to the correct position, that is, when the through hole 272 on the fixing strap 4 is aligned with the circular groove 271 on the auxiliary component 27, the user releases the pressure on the pressing block 23. At this time, the spring 24, which is in a compressed state, quickly rebounds and pushes the pressing block 23 to reset, causing the fixing post 26 to move downward. Under the guidance of the auxiliary component 27, the fixing post 26 passes through the circular groove 271 in sequence and is accurately inserted into the through hole 272 of the fixing strap 4. At this time, the positioning mechanism 2 returns to the locked state, and the fixing strap 4 is physically limited, preventing horizontal sliding and falling off, thus achieving a reliable connection.

[0046] When the device is in use, the housing 1 is subjected to tensile force, impact force or changes in ambient temperature from the outside. At this time, the polypropylene 31 matrix in the composite structure 3 provides basic support, the toughening agent 32 plays a role in absorbing impact energy and maintaining the flexibility of the material at low temperature to prevent brittle fracture, the filler 33 enhances the overall rigidity and heat resistance of the housing 1, and ensures the stability of the structural dimensions when subjected to force or heat, and the color masterbatch 34 maintains the stability of the appearance color. This synergistic effect of multiple materials ensures the long-term durability of the buckle in complex environments.

Claims

1. A multifunctional snap-on plastic product, comprising: The housing (1) and the fixing strap (4) that is connected to the housing (1); The feature is that the housing (1) is provided with a positioning mechanism (2), the positioning mechanism (2) includes a bottom block (21) fixedly connected to the housing (1), a pressing block (23) rotatably connected to the bottom block (21) by bolts (22), and a spring (24) connected between the bottom block (21) and the pressing block (23). The surface of the housing (1) is recessed inward to form a square groove (25), the bottom block (21) is fixedly connected to the inner side wall of the square groove (25), and part of the structure of the pressing block (23) extends out of the square groove (25). The pressing block (23) is fixedly connected to a fixing post (26) at one end facing the fixing band (4), and an auxiliary component (27) is fixedly provided on the bottom block (21). The auxiliary component (27) has a circular groove (271) for the fixing post (26) to pass through. The fixing band (4) has a through hole (272) that cooperates with the fixing post (26). The end of the fixing post (26) away from the pressing block (23) passes through the circular groove (271) and is inserted into the through hole (272) to lock the fixing band (4) to the housing (1).

2. The multifunctional buckle plastic product according to claim 1, characterized in that, The pressing block (23) is divided into a pressing end and a locking end with the bolt (22) as the fulcrum. The fixing post (26) is vertically fixed to the lower surface of the locking end. The spring (24) is located on the side of the bolt (22) near the pressing end.

3. A multifunctional buckle plastic product according to claim 2, characterized in that, One end of the spring (24) is fixedly connected to the inner side of the pressing block (23), and the other end of the spring (24) is fixedly connected to the upper surface of the bottom block (21). The spring (24) is in a compressed state to provide a preload force that keeps the fixing post (26) inserted into the through hole (272).

4. A multifunctional buckle plastic product according to claim 1, characterized in that, The auxiliary component (27) has a circular structure. Both ends of the auxiliary component (27) are fixedly connected to the base block (21). The circular groove (271) is opened on the top of the auxiliary component (27) and runs through it in the vertical direction.

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