Earphone Supporter Segmentation for Die-Free Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional earphone manufacturing using insert molding is limited by the need for dedicated metal dies for each shape variation, hindering productivity and component reuse.
Innovation Solution
The earphone design features a flexible silicone rubber supporter as an independent member, assembled with a hard resin inner frame and housings using engagement hollows and projection parts, allowing for common use of components without insert molding, thus eliminating the need for dedicated metal dies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insert molding is used to integrate the housing and supporter, then the earphone achieves stable fitting and structural integrity, but dedicated metal dies are required for each shape variation, reducing productivity and increasing costs
Solution Approach 1:
The patent divides the previously integrated housing and supporter into separate components. The housing is molded separately from the supporter, allowing independent manufacturing. This segmentation eliminates the need for dedicated metal dies for each shape variation while maintaining the stable fitting function through separate optimization of each component.
Solution Approach 2:
The patent combines the housing and supporter through a joining structure (such as ultrasonic welding, adhesive bonding, or mechanical interlocking) rather than integrated molding. This merging approach achieves the same structural integrity and stable fitting as insert molding but allows for separate manufacturing processes and component reuse across different earphone models.
2Manufacturing precision
If dedicated metal dies are prepared for each shape variation, then manufacturing precision is ensured, but the cost and complexity of production increase
Solution Approach 1:
By segmenting the housing and supporter into separate components, the patent allows each part to be molded with standard dies rather than requiring complex dedicated metal dies for each shape variation. This reduces production complexity while maintaining manufacturing precision through optimized separate molding processes for each component.
3Reliability
If the supporter is made from flexible silicone rubber, then comfort and stable fitting are improved, but the insert molding process becomes more difficult and costly
Solution Approach 1:
The patent separates the flexible silicone rubber supporter from the housing, allowing the supporter to be manufactured independently using appropriate molding techniques for elastomers. This segmentation makes the manufacturing process easier and more cost-effective compared to insert molding, while preserving the comfort and stable fitting benefits of the flexible material.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An earphone includes a first housing and a second housing attached together in a first direction to compose a casing having a space therein, a speaker unit housed in the space, a supporter interposed and held between the first housing and the second housing and having more flexibility than the first housing and the second housing, and an inner frame preventing a reduction in width of the supporter in the first direction.