Novel clasp

Abstract

The utility model belongs to injection moulded product technical field, concretely relates to a novel buckle, including buckle body, the head of integrative forming in the upper end of buckle body and the setting in the side wall of buckle body's elastic sheet, the head is integrative forming by the tip and the deep end, wherein the outside diameter of the lower part of tip is greater than the outside diameter of deep end, makes the buckle and can be connected the sheet metal hole of the thickness of 0.7 4.5mm. The utility model through optimizing elastic sheet structure design, will buckle adapt sheet metal thickness range by traditional 0.7 1.5mm extension 0.7 4.5mm, thoroughly solved the technical bottleneck that thick sheet metal (>1.5mm) cannot be connected the diameter 7mm round hole.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding product technology, specifically relating to a novel buckle. Background Technology

[0002] In the field of sheet metal assembly, snap-fit ​​connections with 7mm diameter circular sheet metal holes are a common rapid assembly method. However, traditional snap-fit ​​connections have significant limitations: existing snap-fit ​​connections capable of engaging 7mm diameter circular sheet metal holes can only accommodate sheet metal thicknesses of 0.7-1.5mm. When the sheet metal thickness exceeds 1.5mm, the snap-fit ​​cannot be inserted due to structural design flaws, leading to assembly failure. This problem directly limits the application of snap-fit ​​connections in thick sheet metal applications (such as industrial equipment housings and heavy machinery components), forcing the industry to adopt additional complex processes such as welding and bolting, increasing assembly and time costs, and failing to meet the demands of lightweight and modular modern design.

[0003] Furthermore, existing snap-fit ​​devices suffer from insufficient assembly stability when adapting to a limited range of sheet metal thicknesses. For example, when the sheet metal thickness approaches its upper limit (1.5mm), the engagement strength between the snap-fit ​​device and the sheet metal hole is easily affected by machining tolerances, potentially leading to loosening or pull-out failure, failing to meet reliability requirements under long-term vibration and load conditions. Simultaneously, the structural design of traditional snap-fit ​​devices does not fully consider the synergistic optimization of material properties and mechanical parameters, making it difficult to balance insertion and pull-out forces when adapting to sheet metals of different thicknesses, resulting in a trade-off between assembly comfort and connection strength. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of buckle to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel buckle, comprising a buckle body, a head integrally formed on the upper end of the buckle body, and a spring piece disposed on the side wall of the buckle body; the head is integrally formed from a pointed tip and a recessed end, wherein the outer diameter of the lower part of the pointed tip is larger than the outer diameter of the recessed end, so that the buckle can engage sheet metal holes with a thickness of 0.7-4.5mm.

[0006] The diameter of the tip is greater than 7 mm, and the diameter of the inserted end is less than or equal to 7 mm.

[0007] The thickness of the spring is 0.5-1.2mm, and the ratio of the spring thickness to the thickness of the sheet metal to be adapted is 1:1.4 to 1:3.75.

[0008] The beneficial effects of this utility model are as follows: By optimizing the spring clip structure design, this utility model expands the range of sheet metal thickness that the snap-fit ​​can adapt to from the traditional 0.7-1.5mm to 0.7-4.5mm, completely solving the technical bottleneck that thick sheet metal (>1.5mm) cannot be snapped into a 7mm diameter round hole. The arc-shaped protrusion of the spring clip forms an interference fit with the sheet metal hole, and its outer diameter dynamic adjustment mechanism can adapt to the deformation requirements of sheet metal of different thicknesses, achieving compatibility of a single snap-fit ​​covering a thickness range of more than 3 times, and significantly reducing the types of parts and assembly costs. The inclined transition surface design at the root of the spring clip significantly improves the elastic deformation capability, ensuring that the spring clip retracts smoothly when a 4.5mm thick sheet metal is inserted, and forms a reliable lock after rebound. Attached Figure Description

[0009] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a schematic diagram illustrating the application of this utility model; Figure 3 for Figure 2 A diagram from another direction. Detailed Implementation

[0010] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0011] 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 disclosure, unless otherwise stated, "a plurality of" means two or more.

[0012] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0013] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0014] like Figure 1 As shown, a new type of buckle, such as Figure 1 As shown, this novel snap fastener includes a cylindrical snap fastener body 1, with a head 2 integrally injection molded at its top with a diameter of 6mm. Two spring tabs 3 are symmetrically arranged on the sidewall of the extension section below the head. The head is integrally formed from a pointed tip 21 and a recessed end 22, wherein the outer diameter of the lower part of the pointed tip 21 is larger than the outer diameter of the recessed end, allowing the snap fastener to engage with sheet metal holes with a thickness of 0.7-4.5mm. The spring tabs 3 have an arc-shaped structure protruding towards the axis, and the root of the spring tab is connected to the body 1 through a 30° inclined transition surface 31. The spring tab thickness is 0.8mm, adapting to a sheet metal thickness of 1.5mm with a thickness ratio of 1:1.875. When the snap fastener is inserted into the sheet metal hole, the spring tab is compressed and contracts, and the interference fit generates a retaining force; the diameter of the pointed tip 21 is greater than 7mm, and the diameter of the recessed end 22 is less than or equal to 7mm, ensuring that the head can be inserted into a through hole with a diameter of 7mm.

[0015] The cylindrical buckle body 1 has a connecting block 4 on its side, which is used to snap onto the sheet metal.

[0016] For 4.5mm thick sheet metal, the thickness of spring 3 was increased to 1.2mm, with a sheet metal thickness ratio of 1:3.75. The angle of the inclined transition surface 31 was adjusted to 15° to enhance root elasticity. The radius of curvature of the spring was reduced, resulting in a maximum outer diameter of 8.2mm. The distance between the head 2 and the spring was increased to 7mm, providing deformation space for the thick sheet metal. Tests showed: insertion force ≤25N, holding force ≥180N, and no plastic deformation.

[0017] When adapting to 0.7mm thin sheet metal, the thickness of spring 3 is reduced to 0.5mm with a thickness ratio of 1:1.4, and the angle of the inclined transition surface 31 is set to 45° to reduce rigidity. The outer diameter of the spring is adjusted to 7.3mm, and the diameter of the head 2 is reduced to 5.5mm. This design keeps the insertion force below 8N, avoiding deformation of the thin sheet metal hole, while maintaining a stable force above 50N.

[0018] When using, align the buckle with the sheet metal hole and slowly insert it vertically, ensuring that the insertion force meets the requirements (when the sheet metal thickness is 2.2mm, the insertion force ≤40N); after insertion, check the engagement between the buckle and the sheet metal hole. At this time, the tip is fully inserted into the sheet metal hole, and the connection between the tip and the deep end is locked on one side of the sheet metal hole. The spring clip on the other side always applies pressure to ensure the connection strength. During use, attention should be paid to the impact of environmental changes on the buckle's performance. Environmental adaptability can be improved through process treatment (such as surface treatment, material modification, etc.).

[0019] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A novel buckle, characterized in that: It includes a buckle body (1), a head (2) integrally formed on the upper end of the buckle body (1), and a spring piece (3) provided on the side wall of the buckle body (1); the head is integrally formed by a tip (21) and a deep end (22), wherein the outer diameter of the lower part of the tip (21) is larger than the outer diameter of the deep end, so that the buckle can engage sheet metal holes with a thickness of 0.7-4.5mm.

2. The novel buckle according to claim 1, characterized in that: The tip (21) has a diameter greater than 7 mm, and the indentation (22) has a diameter less than or equal to 7 mm.

3. The novel buckle according to claim 1, characterized in that: The thickness of the spring (3) is 0.5-1.2mm, and the ratio of the spring thickness to the thickness of the sheet metal to be adapted is 1:1.4 to 1:3.75.

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