A pre-fixing structure of male and female post interference fit, earphone

Abstract

The utility model discloses a male and female column interference fit's pre-fixing structure, earphone, this pre-fixing structure is used for fixing the upper shell and lower shell of electronic equipment, including upper shell and lower shell, wherein the lower shell is provided with a plurality of female columns, the upper shell is provided with male column, male column and female column realize the pre-fixing of upper and lower shell through interference fit. The utility model upper shell and lower shell realize pre-fixing through the interference fit of male column and female column, replace traditional buckle, and the die need not do inclined jacking or line position inclined jacking, reduce die complexity and maintenance cost, and interference fit provides instant pretightening force, avoids 4~8 hours' pressure maintaining waiting in the glue dispensing technology, improves assembly efficiency, and male and female column occupies space far less than buckle structure, solves product internal space limitation problem, and optimizes space utilization.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a pre-fixed structure with interference fit between male and female columns, and an earphone. Background Technology

[0002] In existing technologies, the assembly and fixing methods for the upper and lower shells have significant drawbacks, mainly including three solutions:

[0003] Option 1: Secure assembly via snap-fit ​​– This requires designing angled ejectors or sliding mechanisms in the mold, but these components are vulnerable and will increase subsequent mold maintenance costs. Furthermore, due to limited internal space, the mold may not be able to eject smoothly, presenting limitations and leading to high mold costs.

[0004] Option 2: Fixing with adhesive dispensing – After dispensing, the adhesive requires 4-8 hours to dry, therefore a pressure-holding fixture must be used for fixing. This requires the fabrication of a large number of fixtures, leading to a longer process cycle and increased labor and material costs.

[0005] Option 3: Clip-on + Adhesive Fixing – Although clips provide auxiliary fixing and no pressure-holding fixture is needed after adhesive application, this option still relies on the clip structure and cannot eliminate mold complexity and maintenance issues.

[0006] These traditional processes all increase production costs and complexity, failing to meet the market's stringent requirements for cost control. Specifically, the inclined ejector or sliding structure of the mold is prone to damage, resulting in high maintenance costs; while the investment in pressure-holding fixtures increases the process cycle and labor burden. Therefore, an innovative structural design is urgently needed to solve these problems, optimize mold complexity and space utilization, while reducing costs and reliance on manual labor. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a pre-fixed structure and an earphone with interference fit between male and female columns, wherein the upper shell and the lower shell are pre-fixed by interference fit between male and female columns, replacing the traditional buckle, reducing mold complexity and maintenance costs.

[0008] To solve the above-mentioned technical problems, the first aspect of this utility model discloses a pre-fixing structure with interference fit between male and female columns for fixing the upper and lower shells of an electronic device, including an upper shell and a lower shell, wherein a plurality of female columns are provided on the lower shell and a male column is provided on the upper shell, and the male and female columns achieve pre-fixing of the upper and lower shells through interference fit.

[0009] As an optional implementation: the number of mother columns is 6.

[0010] As another optional implementation, it also includes a dispensing groove, which is disposed on the lower or upper shell for dispensing and fixing.

[0011] As another optional implementation: the dispensing grooves are distributed in a ring around the inner periphery of the lower shell.

[0012] As another alternative implementation, the interference fit is designed with a tolerance of 0.04 to 0.06 mm to provide sufficient preload during assembly.

[0013] As another alternative implementation: the mother pillars are evenly distributed around the periphery of the lower shell.

[0014] As another optional implementation: the male and female pillars are made of engineering plastics.

[0015] As another alternative implementation: the diameter of the male post is 0.75 mm.

[0016] As another optional implementation: the inner diameter of the mother column is 0.7 mm.

[0017] The second aspect of this utility model discloses an earphone, including an upper shell and a lower shell as described in the first aspect of this utility model, wherein the upper shell and the lower shell are earphone shell components.

[0018] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0019] In this embodiment of the invention, the upper and lower shells are pre-fixed through an interference fit between the male and female pillars, replacing the traditional snap-fit ​​mechanism. This eliminates the need for angled ejectors or sliding angled ejectors in the mold, reducing mold complexity and maintenance costs. The interference fit provides immediate pre-tightening force, avoiding the 4-8 hour pressure holding wait in the dispensing process and improving assembly efficiency. The male and female pillars occupy far less space than the snap-fit ​​structure, solving the problem of limited internal space in the product and optimizing space utilization. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0021] Figure 1 This is a schematic diagram of the structure of a pre-fixed structure with an interference fit between male and female columns, as disclosed in an embodiment of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of an upper shell with a pre-fixed structure having an interference fit between male and female columns, as disclosed in an embodiment of this utility model.

[0023] Figure 3 This is a schematic diagram of the structure of an earphone shell with a pre-fixed structure having an interference fit between male and female columns, as disclosed in an embodiment of this utility model. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] See Figures 1-3 This utility model discloses a pre-fixing structure with interference fit of male and female posts 21 for fixing the upper shell 1 and lower shell 2 of an electronic device. The structure includes an upper shell 1 and a lower shell 2, wherein the lower shell 2 is provided with a plurality of female posts 21, and the upper shell 1 is provided with male posts 11. The male posts 11 and female posts 21 achieve pre-fixing of the upper and lower shells 2 through interference fit.

[0027] The upper shell 1 and lower shell 2 of this utility model are pre-fixed by the interference fit of the male column 11 and the female column 21, which replaces the traditional snap-fit. The mold does not need to make a slanted ejector or sliding slanted ejector, reducing the complexity of the mold and maintenance costs. The interference fit provides an instant pre-tightening force, avoiding the 4-8 hour pressure holding wait in the dispensing process and improving assembly efficiency. The male and female columns 21 occupy much less space than the snap-fit ​​structure, solving the problem of limited internal space in the product and optimizing space utilization.

[0028] In another optional embodiment, the number of mother pillars 21 is six. The six mother pillars 21 evenly distribute the pressure of the shell, avoiding local stress concentration; the multi-point interference fit ensures that the upper and lower shells 2 do not shift, providing a stable foundation for the dispensing process.

[0029] In another optional embodiment, a dispensing groove 22 is further included, disposed on the lower shell 2 or the upper shell 1, for dispensing and fixing. The interference fit pre-fixation combined with long-term dispensing fixation improves the long-term reliability of the product; the groove structure limits the glue flow path, preventing glue overflow from contaminating internal components.

[0030] In another optional embodiment, the dispensing channels 22 are arranged in a ring around the inner periphery of the lower shell 2. The ring-shaped dispensing channels form a continuous closed barrier, preventing the intrusion of external dust / liquid.

[0031] In another optional embodiment, the interference fit tolerance is designed to be 0.04–0.06 mm to provide sufficient preload during assembly. A reasonable tolerance range avoids over-assembly damage or insufficient preload; matching the elastic deformation range of the ABS / PC material ensures smooth insertion of the male post 11.

[0032] Optionally, the diameter of the male post 11 is 0.75 mm.

[0033] Optionally, the inner diameter of the mother column 21 is 0.7 mm.

[0034] In yet another alternative embodiment, the mother pillars 21 are evenly distributed around the periphery of the lower shell 2.

[0035] In another optional embodiment, the male post 11 and the female post 21 are made of engineering plastics.

[0036] Example 2

[0037] This utility model discloses an earphone, including an upper shell and a lower shell as described in Embodiment 1, wherein the upper shell and the lower shell are earphone shell components.

[0038] The contents disclosed in this utility model embodiment are merely preferred embodiments of this utility model and are only used to illustrate the technical solutions of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A pre-fixed structure with interference fit between male and female columns, used to fix the upper and lower shells of electronic devices, characterized in that: It includes an upper shell and a lower shell, wherein the lower shell is provided with multiple female pillars and the upper shell is provided with male pillars, and the male and female pillars are pre-fixed by interference fit; It also includes a dispensing groove, which is disposed on the lower or upper shell for dispensing and fixing.

2. The pre-fixed structure according to claim 1, characterized in that: The number of mother columns is 6.

3. The pre-fixed structure according to claim 1, characterized in that: The dispensing grooves are distributed in a ring around the inner periphery of the lower shell.

4. The pre-fixed structure according to any one of claims 1 to 3, characterized in that: The interference fit is designed with a tolerance of 0.04 to 0.06 mm to provide sufficient preload during assembly.

5. The pre-fixed structure according to any one of claims 1 to 3, characterized in that: The mother pillars are evenly distributed around the periphery of the lower shell.

6. The pre-fixed structure according to any one of claims 1 to 4, characterized in that: The male and female pillars are made of engineering plastics.

7. The pre-fixed structure according to claim 1, characterized in that: The diameter of the male post is 0.75 mm.

8. The pre-fixed structure according to claim 1, characterized in that: The inner diameter of the mother column is 0.7 mm.

9. An earphone, characterized in that, Includes the upper shell and lower shell as described in any one of claims 1 to 6, wherein the upper shell and lower shell are earphone shell components.

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