A buckle and connecting assembly adapted for multiple size apertures

Abstract

The utility model relates to the technical field of automobile parts, and puts forward a buckle and connecting assembly suitable for multiple size apertures. The buckle comprises a body, one end of the body is provided with a connecting part for connecting with a first part; a plurality of clamping parts are sequentially arranged along the axial direction of the other end of the body; the maximum radial dimension of the plurality of clamping parts sequentially decreases in the direction away from the connecting part to respectively adapt to mounting holes of different apertures; the clamping part is made of elastic material and is configured to be elastically deformed to pass through the mounting hole of the second part and elastically recover after passing through the mounting hole to be clamped on the side of the second part away from the first part. The disclosed buckle effectively solves the problems of numerous part types, complex management and easy-to-install errors caused by the traditional "one hole one buckle" mode, compared with the scheme of relying on inclined surface friction locking in the prior art, a more reliable and stable connection effect is provided, and the anti-loosening performance under harsh working conditions such as vibration and impact is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a buckle and connecting assembly that can accommodate multiple hole sizes. Background Technology

[0002] In the automotive manufacturing and other industrial sectors, snap-fit ​​connections, as a typical mechanical connection method, refer to the rapid assembly and fixation of two parts to be connected through an intermediate structural component with elastic snap-fit ​​characteristics. The core advantages of this connection method are convenient installation and low cost, and it is widely used in the assembly of components such as vehicle interior parts and wiring harness brackets.

[0003] However, traditional snap-fit ​​connections typically follow a "one hole, one snap" matching principle, meaning a snap of a specific size can only fit a connector with a specific hole diameter. When the mounting hole diameters on the connected components vary, a corresponding number of different snaps must be provided. This not only significantly increases the number of material codes but also introduces complexity to warehouse management, production distribution, and on-site assembly. It is highly susceptible to problems such as incorrect or missing parts due to model confusion, affecting production efficiency and connection reliability.

[0004] To improve the versatility of snap fasteners, existing technologies have developed design concepts aimed at enabling a single snap fastener to adapt to multiple hole sizes. For example, Chinese patent publication CN 219197843 U proposes an improved solution. The core of this solution lies in its snap-fit ​​structure, which includes a main rod and two symmetrically distributed elastic plates. Each elastic plate contains a guide portion and an abutment portion at an obtuse angle to the extension direction of the main rod. The theoretical basis is that through the elastic deformation of the elastic plates, the edges of insertion holes of different sizes can abut against different positions on the outer edge of the abutment portion, thereby achieving size adaptation.

[0005] While this structure theoretically expands the range of applications, its connection stability has significant drawbacks. The locking force of the latch relies primarily on the friction between the edge of the socket and the inclined surface of the contact portion. In actual working conditions, especially in environments with continuous vibration and impact, such as when a vehicle is in motion, this single friction constraint mechanism is unreliable. The edge of the socket is prone to slipping along the smooth inclined contact surface, leading to loosening of the connection and posing a safety hazard.

[0006] In summary, the existing multi-aperture adapter buckles still have significant shortcomings in terms of vibration resistance and anti-loosening performance, making it difficult to meet the high standards of connection reliability required by industrial sectors such as the automotive industry. Utility Model Content

[0007] In view of this, the present invention proposes a buckle and connecting assembly that can adapt to multiple hole sizes, aiming to solve the technical problems of unreliable connection and easy loosening of existing buckles that can adapt to multiple hole sizes under vibration or impact conditions.

[0008] The technical solution of this utility model is implemented as follows: On the one hand, this utility model provides a buckle that adapts to multiple hole sizes, the buckle comprising: The body has a connecting part at one end for connecting with the first part; and a plurality of snap-fit ​​parts are sequentially provided at the other end of the body along its axial direction. The maximum radial dimension of the plurality of snap-fit ​​portions decreases sequentially in the direction away from the connecting portion to accommodate mounting holes of different diameters; the snap-fit ​​portions are made of elastic material and are configured to undergo elastic deformation to pass through the mounting hole of the second part, and after passing through the mounting hole, elastically recover and snap onto the side of the second part away from the first part.

[0009] Based on the above technical solution, preferably, the snap-fit ​​part is an annular flange surrounding the outer peripheral surface of the main body, the side of the snap-fit ​​part facing the connecting part is a plane for abutting against the second part, and the side facing away from the connecting part is a tapered inclined surface for guiding insertion.

[0010] Based on the above technical solution, preferably, the main body is further provided with a first limiting part, which is located between the connecting part and the snap-fit ​​part; when the buckle is in the snap-fit ​​state, the first limiting part is configured to abut against the side of the second part facing the first part.

[0011] Based on the above technical solution, preferably, the first limiting part is made of elastic material.

[0012] Based on the above technical solution, preferably, the first limiting part is a conical lip structure, and its outer diameter gradually increases in the direction away from the connecting part.

[0013] Based on the above technical solution, preferably, the buckle is an integrally formed structure.

[0014] Secondly, this utility model discloses a connecting component, including a first part, a second part, and a buckle adapted to multiple hole sizes as described in the first aspect. The second part has an installation hole, the connecting part is fixedly connected to the first part, the body passes through the installation hole of the second part, and the snap-fit ​​part on the body that matches the hole size of the installation hole is elastically snapped onto the side of the second part away from the first part.

[0015] Based on the above technical solution, preferably, the first part includes a panel and a mounting part fixedly located on the bottom surface of the panel. The mounting part has a mounting cavity with an opening on one side in the horizontal direction. The side of the mounting part away from the panel has a channel communicating with the mounting cavity. The bottom of the opening side of the mounting cavity has a notch communicating with the channel. The connecting part includes a plug-in part formed at the end of the body away from the snap-fit ​​part. The plug-in part is accommodated in the mounting cavity. The body horizontally passes through the notch and extends through the channel. The outer diameter of the plug-in part is larger than the inner diameter of the channel.

[0016] Based on the above technical solution, preferably, the connecting part is further provided with a second limiting part, which is a disc-shaped structure arranged around the outer peripheral surface of the main body. The second limiting part is located between the insertion part and the snap-fit ​​part. When the insertion part is connected to the bottom surface of the mounting cavity, the second limiting part abuts against the bottom surface of the mounting part to achieve axial constraint between the first part and the snap-fit.

[0017] Based on the above technical solution, preferably, the bottom surface of the mounting part is provided with anti-detachment parts on both sides of the notch, the outer diameter of the second limiting part is smaller than the distance between the two anti-detachment parts, and the anti-detachment parts are used to restrict the second limiting part from moving in a direction perpendicular to the axis of the body.

[0018] The present invention has the following advantages over the prior art: (1) This utility model integrates multi-size adaptation functions into a single snap-fit ​​structure by setting multiple elastic snap-fit ​​parts with successively decreasing outer diameters on the main body. It effectively solves the problems of numerous parts, complex management, and easy misassembly caused by the traditional "one hole, one snap" mode. At the same time, its snap-fit ​​mechanism based on elastic deformation and recovery provides a more reliable and stable connection effect compared with the existing technology that relies on inclined surface friction locking, and significantly improves the anti-loosening performance under harsh working conditions such as vibration and impact.

[0019] (2) By adding a first limiting part to the main body, an important auxiliary axial constraint function is provided for the snap-fit ​​connection. This design cleverly utilizes the structure of the second part itself to work in synergy with the snap-fit ​​part to jointly restrict the axial degree of freedom of the connected parts and improve the resistance to loosening.

[0020] (3) By applying a snap fastener with multi-size adaptability between the first and second parts, a universal, reliable, and efficient connection solution is constructed. This connection component not only inherits the advantages of snap fasteners in reducing the types of parts and simplifying management, but also achieves connection stability and vibration resistance far exceeding that of traditional friction snap fasteners in practical applications through its unique elastic mechanical snap-fit ​​mechanism, effectively meeting the high standards of connection reliability required by industrial fields such as automobiles.

[0021] (4) By designing a mounting part with a specific structure on the first part, and forming a precise dimensional and spatial fit with the snap-fit's insertion part and body, a solution that is easy to assemble, accurately positioned, and reliably connected is provided. The horizontal insertion assembly method improves operational convenience, while the synergistic effect of the mounting cavity, notch, and channel ensures precise guidance and secure fixation of the snap-fit. The dimensional fit between the insertion part and the channel further prevents axial loosening of the snap-fit ​​from a structural perspective, greatly improving the stability and safety of the entire connection assembly under complex working conditions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the buckle disclosed in an embodiment of the present utility model; Figure 2 This is a partially exploded view of the connecting component disclosed in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the overall structure of the connecting component disclosed in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the planar structure of the first type of connecting component disclosed in this utility model embodiment; Figure 5 This is a schematic diagram of the planar structure of the second type of connecting component disclosed in this utility model embodiment; Figure 6 This is a schematic diagram of the planar structure of the third type of connecting component disclosed in the embodiments of this utility model; Figure 7 This is a three-dimensional structural schematic diagram of the first part disclosed in an embodiment of the present utility model; Figure label: 1. Buckle; 11. Body; 12. Connecting part; 13. Snap-fit ​​part; 14. First limiting part; 121. Insertion part; 122. Second limiting part; 2. First part; 21. Panel; 22. Mounting part; 221. Mounting cavity; 222. Channel; 223. Notch; 224. Anti-detachment part; 3. Second part; 31. Mounting hole. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0031] like Figure 1 As shown, combined with Figure 2-6 This utility model discloses a buckle 1 that adapts to multiple aperture sizes. The buckle 1 includes a body 11, which serves as the supporting skeleton for the entire buckle 1 and provides a structural foundation for the connection functional areas at both ends. The presence of the body 11 ensures that the buckle 1 has the necessary strength and stability during assembly and under stress, and is a key component in the force transmission path.

[0032] At one end of the main body 11, a connecting part 12 is provided for connection with the first part 2. This connecting part 12 is the interface for fixing the buckle 1 to the first part 12 to be connected, and its specific form can be a hook, thread, mushroom buckle, etc. The design of the connecting part 12 allows the buckle 1 to be quickly and reliably pre-installed or fixed on the first part 2, preparing for subsequent connection with the second part 3, and realizing a modular assembly process.

[0033] At the other end of the body 11, that is, the end furthest from the connecting part 12, a plurality of snap-fit ​​parts 13 are arranged sequentially along the axial direction of the body 11. This axial arrangement allows a single snap-fit ​​1 to provide multiple snap-fit ​​points at different positions in the axial direction. The maximum radial dimension of the plurality of snap-fit ​​parts 13 is designed to decrease sequentially in the direction away from the connecting part 12. This means that from the snap-fit ​​part 13 with the maximum radial dimension closest to the connecting part 12 to the snap-fit ​​part 13 with the minimum radial dimension at the farthest end, a sequence with a gradually changing diameter is formed. This gradient size design is fundamental to achieving the multi-aperture adaptation function. Regardless of whether the specific outline of the snap-fit ​​part is circular, polygonal, or irregular, as long as its maximum radial dimension meets the decreasing rule, the function of hierarchical adaptation to different apertures can be achieved. When it is necessary to connect a second part 3 with mounting holes 31 of different apertures, the assembler can select the snap-fit ​​part 13 whose outer diameter best matches the aperture of the target mounting hole 31 as the working part, thereby ensuring the reliability and tightness of the snap-fit.

[0034] The snap-fit ​​part 13 is made of an elastic material, which gives it the ability to undergo elastic deformation. During assembly, when the snap-fit ​​part 13 is subjected to axial pressure toward the mounting hole 31 of the second part 3, it undergoes elastic contraction deformation toward the center of the body 11, temporarily reducing its outer diameter, thus allowing it to pass smoothly through the mounting hole 31, whose diameter is slightly smaller than its natural outer diameter. Once the snap-fit ​​part 13 has completely passed through the mounting hole 31, the radial constraint it is subjected to immediately disappears. At this time, the inherent elastic restoring force of the material drives the snap-fit ​​part 13 to quickly return to its original size. This returned snap-fit ​​part 13 will lock onto the side of the second part 3 opposite to the first part 2 (i.e., the other side of the mounting hole 31), forming a mechanical interlock. This snap-fit ​​formed by elastic restoring force is essentially a mechanical hook, which has higher resistance to pull-out and vibration stability compared to methods that rely solely on friction.

[0035] This invention integrates multi-size adaptation functionality into a single snap-fit ​​structure by setting multiple elastic snap-fit ​​parts 13 with successively decreasing outer diameters on the main body 11. This effectively solves the problems of numerous parts, complex management, and easy misassembly caused by the traditional "one hole, one snap" method. Furthermore, its snap-fit ​​mechanism based on elastic deformation and recovery provides a more reliable and stable connection effect compared to existing technologies that rely on inclined surface friction locking, significantly improving anti-loosening performance under harsh conditions such as vibration and impact.

[0036] In some embodiments, the snap-fit ​​portion 13 is an annular flange surrounding the outer peripheral surface of the body 11. This annular flange structure forms a circumferentially continuous snap-fit ​​edge, ensuring uniform and stable 360-degree contact and locking with the edge of the mounting hole 31 of the second part 3. The annular design makes the snap-fit ​​force evenly distributed, avoiding local stress concentration, thereby improving the reliability and structural strength of the snap-fit.

[0037] The annular flange has an asymmetrical cross-sectional shape, which is key to its specific function. The side of the flange facing the connector 12 is constructed as a plane. This planar design aims to form a large surface contact with the surface of the second part 3 opposite to the first part 2. When surface contact occurs, the plane can provide stable and uniform support force, effectively dispersing contact pressure and preventing wear or loosening of parts due to point or line contact under long-term vibration or stress, significantly enhancing the stability of axial locking.

[0038] On the side of the annular flange facing away from the connecting portion 12, a tapered ramp is provided. When the latch 1 is pushed into the mounting hole 31 of the second part 3 by an axial force, the tapered ramp will first contact the edge of the mounting hole 31. Due to the geometric properties of the ramp, the axial thrust is decomposed into a radially inward component, which forces the flange made of elastic material to undergo radial contraction deformation, reducing its outer diameter, thereby allowing it to smoothly slide into and pass through the mounting hole 31. This design greatly reduces insertion resistance and simplifies assembly operations.

[0039] In some embodiments, the main body 11 is further provided with a first limiting part 14, which is located between the connecting part 12 and the snap-fit ​​part 13. When the latch 1 is in the working state, that is, after the snap-fit ​​part 13 has passed through the mounting hole 31 of the second part 3 and completed the snap-fit, the first limiting part 14 is exactly located within the mounting hole 31 of the second part 3 or close to the side of the first part 2. This abutting relationship constitutes a constraint point in the axial direction. When there is an assembly gap between the first part 2 and the second part 3 or when there is a relative displacement tendency due to vibration, the first limiting part 14 can effectively limit the excessive movement of the second part 3 toward the first part 2 through its abutting action, thereby enhancing the stability of the connecting assembly in the axial dimension.

[0040] The introduction of the first limiting part 14 adds a crucial axial constraint mechanism to the snap-fit ​​connection 1. It does not directly participate in the snap-fit ​​action through the mounting hole 31, but rather functions after the snap-fit ​​action is completed. It and the snap-fit ​​part 13 are located on opposite sides of the second part 3 in the axial direction, together forming a "clamping" effect. The snap-fit ​​part 13 hooks onto the back of the second part 3 (the side away from the first part 2), while the first limiting part 14 abuts against the front of the second part 3 (the side facing the first part 2). Working together, they significantly reduce the risk of the second part 3 becoming loose or wobbly in the axial direction.

[0041] By adding a first limiting part 14 to the body 11, an important auxiliary axial constraint function is provided for the connection of the snap fastener 1. This design cleverly utilizes the structure of the second part 3 itself, which works in conjunction with the snap fastener 13 to restrict the axial degree of freedom of the connected parts and improve the resistance to loosening.

[0042] In some embodiments, the first limiting portion 14 is made of an elastic material. When the body 11 of the latch 1 passes through the mounting hole 31 of the second part 3, the first limiting portion 14 is subjected to radial compression at the instant it contacts the edge of the mounting hole 31 or its surrounding area. Due to its elastic properties, it undergoes compressive deformation toward the axis of the body 11, thereby reducing the instantaneous outer diameter. This deformation significantly reduces the resistance when the latching portion 13 passes through the mounting hole 31, making the assembly operation more effortless and smoother.

[0043] When assembled and in operation, the first limiting portion 14 of the elastic material continuously abuts against the side of the second part 3 facing the first part 2, relying on its restoring force. This abutment is not an absolutely rigid contact, but a "soft contact" with slight elasticity. When there is vibration or slight dimensional change due to thermal expansion and contraction, the elasticity of the first limiting portion 14 can effectively buffer and compensate. It can adapt to small gap changes and always maintain the abutment pressure on the second part 3, thereby effectively suppressing abnormal noise or loosening caused by gaps and significantly improving the stability of the connection system under dynamic operating conditions.

[0044] In some embodiments, the first limiting portion 14 is a tapered lip structure, the outer diameter of which gradually increases in the direction away from the connecting portion 12. When the latch 1 is pressed against the mounting hole 31 of the second part 3, the edge of the lip will first contact the surface of the second part 3 facing the first part 2. As the outer diameter gradually increases, the contact point will move smoothly towards the root along the tapered slope. In this process, the axial thrust is effectively converted into a force that causes the lip to bend radially inward. When the latch 1 is fully in place and in the working state, its lip edge will tightly abut against the surface of the second part 3 facing the first part 2 under the action of elastic restoring force. When there is vibration or a small relative displacement of the components, the elasticity of the lip allows it to undergo a small stretching deformation, thereby continuously maintaining the contact pressure, preventing the latch 1 from dislodging from the second part 3, or reducing the axial movement of the second part 3 relative to the latch 1.

[0045] In some embodiments, the snap-fit ​​1 is a one-piece molded structure. The one-piece molded structure avoids stress concentration points, potential loosening, or failure risks that may arise from connection and assembly. For snap-fits that rely on elastic deformation to achieve their snap-fit ​​function, one-piece molding ensures uniform and smooth force transmission in the elastic material, eliminates weak points at component connections, and thus significantly improves the snap-fit's fatigue life under repeated deformation, structural strength, and connection reliability under vibration environments.

[0046] Furthermore, the snap fastener in this embodiment is made of an elastic material, possessing the ability to undergo controllable elastic deformation as a whole. This characteristic is present throughout the entire working cycle of the snap fastener 1. During assembly, when the snap fastener 1 is pressed into the mounting hole 31 of the second part 3, not only will the specific snap-fit ​​portion 13 deform, but the body 11 of the snap fastener 1 and even the connecting portion 12 area may also experience coordinated, slight elastic bending or compression. This helps to absorb assembly deviations, allowing the snap fastener 1 to be smoothly inserted and aligned with the mounting hole 31, reducing assembly difficulty and stringent precision requirements, and improving the fault tolerance and ease of assembly.

[0047] In its assembled working state, the elastic material endows the entire snap-fit ​​1 structure with a certain degree of "flexibility". When the connecting component is subjected to external vibration, impact, or thermal stress, snap-fit ​​1 does not transmit stress as a completely rigid component, but can absorb and buffer this energy through its overall small elastic deformation. This dynamic response characteristic can effectively suppress vibration transmission and prevent stress concentration at the connection interface, thereby significantly reducing the risk of connection failure due to material fatigue or plastic deformation, and improving the durability and reliability of the connection under long-term dynamic loads.

[0048] In terms of manufacturing process, when the buckle 1 is made entirely of elastic material, it can usually be produced using efficient one-time molding processes such as injection molding. This simplifies the manufacturing process, reduces production costs, and is especially suitable for the integrated manufacturing of parts with complex spatial geometry, such as the snap-fit ​​part 13 and the limiting part, ensuring the consistency of product structure and quality stability.

[0049] The second embodiment of this utility model discloses a connecting assembly, including a first part 2, a second part 3, and a snap fastener 1 adapted to multiple aperture sizes as described in the first aspect. These three parts work together to form a complete mechanical connection system. The first part 2 typically serves as a fixed base component, the second part 3 is a movable or additional component that needs to be connected, and the snap fastener 1 acts as an intermediate medium connecting the two.

[0050] The second part 3 has a mounting hole 31. The diameter of the mounting hole 31 is fixed, and its size determines which of the multiple snap-fit ​​parts 13 of the buckle 1 will be actually used for the final snap-fit ​​engagement. The existence of the mounting hole 31 provides a path for the buckle 1 to pass through and be fixed, and is a key structure for forming a connection.

[0051] The connecting part 12 is fixedly connected to the first part 2. This fixed connection can be achieved in various ways, such as by embedding the connecting part 12 of the buckle 1 into the slot of the first part 2, or by welding, bonding, or other methods. This step first establishes a stable relationship between the buckle 1 and the first part 2, laying the foundation for the subsequent connection of the second part 3.

[0052] During assembly, the body 11 of the snap fastener 1 passes through the mounting hole 31 on the second part 3. When an axial force is applied, the snap-fit ​​portion 13 on the snap fastener 1, whose outer diameter is larger than that of the mounting hole 31, undergoes elastic deformation, thereby shrinking its outer diameter to pass smoothly through the channel. During this process, the remaining parts of the snap fastener 1, such as the body 11 and the connecting portion 12, provide the necessary support and guidance for the deformation and movement of the snap-fit ​​portion 13.

[0053] Ultimately, the locking part 13 on the body 11 of the buckle 1 that best matches the diameter of the mounting hole 31 of the second part 3 will completely pass through the mounting hole 31. Once passed, due to the elastic restoring force, the locking part 13 will quickly return to its original size, thus elastically locking onto the side of the second part 3 opposite to the first part 2. This locking method forms a mechanical interlock, with the locking part 13 firmly gripping the back of the second part 3 like a hook, providing strong resistance to pull-out. Compared to traditional friction locking, this mechanical locking based on elastic recovery can more effectively resist vibration and impact, preventing the connection from loosening.

[0054] By applying a multi-size adaptable snap-fit ​​1 between the first part 2 and the second part 3, a universal, reliable, and efficient connection solution is constructed. This connection component not only inherits the advantages of snap-fit ​​1 in reducing the types of parts and simplifying management, but also achieves connection stability and vibration resistance far exceeding that of traditional friction snap-fit ​​1 in practical applications through its unique elastic mechanical snap-fit ​​mechanism, effectively meeting the high standards of connection reliability required by industrial fields such as the automotive industry.

[0055] This embodiment illustrates one connection method between the buckle 1 and the first part 2.

[0056] For details, please refer to the appendix. Figure 7As shown, the first part 2 includes a panel 21 and a mounting portion 22 fixedly located on the bottom surface of the panel 21. The panel 21 typically constitutes the main supporting part of the first part 2, while the mounting portion 22 is a structural unit protruding from the bottom surface of the panel 21 specifically designed to accommodate and fix the buckle 1. This split or one-piece structural design allows the mounting portion 22 to form a specialized space for precisely guiding and positioning the buckle 1.

[0057] The mounting part 22 has a mounting cavity 221 with an opening on one side in the horizontal direction. The mounting cavity 221 is a groove or cavity that opens from the side of the mounting part 22, and the design of its opening direction determines the assembly path of the snap fastener 1. The horizontal opening allows the snap fastener 1 to be inserted horizontally into the mounting cavity 221 from the side. This assembly method is convenient to operate, especially in space-constrained situations, and is more advantageous than vertical installation from the top or bottom.

[0058] The mounting portion 22 has a channel 222 communicating with the mounting cavity 221 on the side away from the panel 21. This channel 222 is typically a hole penetrating the thickness of the mounting portion 22, with its axis substantially aligned with the axial direction of the body 11 of the snap fastener 1. The channel 222 provides a path for the snap fastener 1 body 11 to pass through, ensuring that the snap fastener 1 can continue to extend and connect with the second part 3. The inner diameter of the channel 222 is larger than the outer diameter of the body 11 to allow the snap fastener 1 body 11 to pass through smoothly.

[0059] The bottom of the opening side of the mounting cavity 221 has a notch 223 that communicates with the channel 222. The notch 223 is a key transition structure connecting the bottom of the mounting cavity 221 and the entrance of the channel 222. It is not a complete hole, but an opening that allows the body 11 of the snap fastener 1 to move horizontally from the mounting cavity 221 to the channel 222. The shape and size of the notch 223 enable the snap fastener 1, after being horizontally inserted into the mounting cavity 221, to smoothly align and enter the channel 222 through the notch 223, completing the posture transformation from horizontal assembly to vertical (or axial) exit.

[0060] The connecting portion 12 of the snap fastener 1 includes a plug portion 121 formed at the end of the body 11 away from the snap-fit ​​portion 13. This plug portion 121 is a specific implementation of the connecting portion 12, and its shape is designed to match the mounting cavity 221. The plug portion 121 is housed within the mounting cavity 221, meaning that when the snap fastener 1 is fully installed, the plug portion 121 is enclosed and confined within the closed or semi-closed space of the mounting cavity 221. This accommodating relationship allows the plug portion 121 to contact the inner wall of the mounting cavity 221, thereby achieving radial positioning and partial directional constraint of the snap fastener 1 on the first part 2.

[0061] The body 11 of the snap fastener 1 passes horizontally through the notch 223 and extends through the channel 222, which defines the assembly trajectory of the snap fastener 1: First, the snap fastener 1 is inserted horizontally, so that the insertion part 121 enters the mounting cavity 221; then, part of the body 11 of the snap fastener 1 enters the channel 222 through the bottom notch 223; finally, the body 11 exits the mounting part 22 vertically along the channel 222, ready to engage with the second part 3. The entire assembly process is a continuous and precisely guided action.

[0062] The outer diameter of the insertion part 121 is larger than the inner diameter of the channel 222. This dimensional relationship is crucial for achieving the axial limiting function. When the latch 1 is installed in place, the larger insertion part 121 is blocked outside the smaller channel 222 entrance and cannot pass through the channel 222. This forms a mechanical stop, preventing the latch 1 from accidentally dislodging from the first part 2 under axial force (such as the tensile force generated after engaging with the second part 3), thus ensuring the reliability of the connection.

[0063] By designing a mounting portion 22 with a specific structure on the first part 2, and forming a precise dimensional and spatial fit with the insertion portion 121 of the snap fastener 1 and the body 11, a solution that is easy to assemble, accurately positioned, and reliably connected is provided. The horizontal insertion assembly method improves operational convenience, while the synergistic effect of the mounting cavity 221, notch 223, and channel 222 ensures precise guidance and secure fixation of the snap fastener 1. The dimensional fit between the insertion portion 121 and the channel 222 further structurally prevents axial loosening of the snap fastener 1, greatly improving the stability and safety of the entire connection assembly under complex working conditions.

[0064] In the above embodiment, the height of the mounting cavity 221 is adapted to the thickness of the insertion part 121. In this way, when the insertion part 121 is horizontally inserted into the mounting cavity 221, the upper end of the buckle 1 is axially limited within the mounting cavity 221.

[0065] Considering that in the actual assembly process, in order to facilitate the smooth insertion of the plug part 121 into the mounting cavity 221, the plug part 121 usually forms a clearance fit with the mounting cavity 221, that is, the thickness of the plug part 121 is less than the height of the mounting cavity 221.

[0066] However, in this case, when the buckle 1 and the first part 2 are connected, the buckle 1 will move axially relative to the first part 2 because the insertion part 121 will move axially within the mounting cavity 221.

[0067] Therefore, the following technical solution is also disclosed in this embodiment.

[0068] The connecting part 12 is also provided with a second limiting part 122. The second limiting part 122 is a disc-shaped structure arranged around the outer peripheral surface of the body 11. The second limiting part 122 is located between the insertion part 121 and the snap-fit ​​part 13. When the insertion part 121 is connected to the bottom surface of the mounting cavity 221, the second limiting part 122 abuts against the bottom surface of the mounting part 22 to achieve axial constraint between the first part 2 and the snap-fit ​​1.

[0069] During assembly, when the latch 1 is pushed towards the first part 2 until the insertion part 121 contacts or approaches the inner bottom surface of the mounting cavity 221, the second limiting part 122 simultaneously abuts against the outer bottom surface of the mounting part 22. At this time, the solid structure (its bottom) of the mounting part 22 is "clamped" or "bound" within the axial space between the insertion part 121 and the second limiting part 122. The disc-shaped second limiting part 122 provides stable support for this clamping through its large contact surface. The insertion part 121 and the second limiting part 122 work together to firmly restrict the mounting part 22 between them, thereby achieving axial constraint of the latch 1 by the first part 2 and effectively preventing the latch 1 from axially loosening or shifting under vibration or external force.

[0070] In some embodiments, the bottom surface of the mounting part 22 is provided with anti-detachment parts 224 on both sides of the notch 223, and the outer diameter of the second limiting part 122 is smaller than the distance between the two anti-detachment parts 224. The anti-detachment parts 224 are used to restrict the second limiting part 122 from moving in a direction perpendicular to the axis of the body 11.

[0071] Specifically, the anti-detachment part 224 is a structural member that protrudes upward from the bottom surface of the mounting part 22. Two anti-detachment parts 224 are positioned opposite each other at the edge of the notch 223, forming a lateral enclosure of the notch 223 area. When the connecting assembly is subjected to lateral force or vibration impact, the second limiting part 122 may have a tendency to radial displacement. At this time, the two anti-detachment parts 224 contact the outer peripheral surface of the second limiting part 122 through their inner surfaces, together forming an effective guiding and restraining mechanism to prevent the second limiting part 122 from undergoing excessive lateral displacement.

[0072] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A buckle adaptable to multiple hole sizes, characterized in that, The buckle (1) includes: The body (11) has a connecting part (12) at one end for connecting with the first part (2); and a plurality of snap-fit ​​parts (13) are sequentially provided at the other end of the body (11) along its axial direction. The maximum radial dimension of the plurality of snap-fit ​​portions (13) decreases sequentially in the direction away from the connecting portion (12) to fit mounting holes (31) of different diameters respectively; the snap-fit ​​portions (13) are made of elastic material and are configured to be able to elastically deform to pass through the mounting hole (31) of the second part (3) and elastically recover after passing through the mounting hole (31) to snap onto the side of the second part (3) away from the first part (2).

2. The buckle adaptable to multiple aperture sizes as described in claim 1, characterized in that: The snap-fit ​​part (13) is an annular flange surrounding the outer peripheral surface of the body (11). The side of the snap-fit ​​part (13) facing the connecting part (12) is a plane for abutting against the second part (3), and the side facing away from the connecting part (12) is a tapered inclined surface for guiding insertion.

3. The buckle adaptable to multiple aperture sizes as described in claim 1, characterized in that: The main body (11) is also provided with a first limiting part (14), which is located between the connecting part (12) and the snap-fit ​​part (13). When the buckle (1) is in the snap-fit ​​state, the first limiting part (14) is configured to abut against the side of the second part (3) facing the first part (2).

4. The buckle adaptable to multiple aperture sizes as described in claim 3, characterized in that: The first limiting part (14) is made of elastic material.

5. The buckle adaptable to multiple aperture sizes as described in claim 4, characterized in that: The first limiting part (14) is a conical lip structure, and its outer diameter gradually increases in the direction away from the connecting part (12).

6. The buckle adaptable to multiple aperture sizes as described in claim 1, characterized in that: The buckle (1) is a one-piece molded structure.

7. A connecting component, characterized in that: The device includes a first part (2), a second part (3), and a buckle adapted to multiple aperture sizes as described in any one of claims 1 to 6. The second part (3) has a mounting hole (31). The connecting part (12) is fixedly connected to the first part (2). The body (11) passes through the mounting hole (31) of the second part (3), and the snap-fit ​​part (13) on the body (11) that matches the aperture of the mounting hole (31) is elastically snapped onto the side of the second part (3) away from the first part (2).

8. The connection component as claimed in claim 7, characterized in that: The first part (2) includes a panel (21) and a mounting part (22) fixedly located on the bottom surface of the panel (21). The mounting part (22) has a mounting cavity (221) with an opening on one side in the horizontal direction. The mounting part (22) has a channel (222) communicating with the mounting cavity (221) on the side away from the panel (21). A notch (223) communicating with the channel (222) is formed at the bottom of the opening side of the mounting cavity (221). The connecting portion (12) includes a plug portion (121) formed at one end of the body (11) away from the snap-fit ​​portion (13), the plug portion (121) is accommodated in the mounting cavity (221), the body (11) passes horizontally through the notch (223) and extends through the channel (222), and the outer diameter of the plug portion (121) is larger than the inner diameter of the channel (222).

9. The connection component as claimed in claim 8, characterized in that: The connecting part (12) is also provided with a second limiting part (122). The second limiting part (122) is a disc-shaped structure arranged around the outer peripheral surface of the body (11). The second limiting part (122) is located between the plug-in part (121) and the snap-fit ​​part (13). When the plug-in part (121) is connected to the bottom surface of the mounting cavity (221), the second limiting part (122) abuts against the bottom surface of the mounting part (22) to achieve axial constraint between the first part (2) and the snap-fit ​​(1).

10. The connection component as claimed in claim 9, characterized in that; The bottom surface of the mounting part (22) is provided with anti-detachment parts (224) on both sides of the notch (223). The outer diameter of the second limiting part (122) is smaller than the distance between the two anti-detachment parts (224). The anti-detachment part (224) is used to restrict the second limiting part (122) from moving in a direction perpendicular to the axis of the body (11).

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