Earphone Pressure Relief Hole Protection With Porous Net
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Solution Overview
Problem
Existing earphones with air conduction loudspeakers suffer from issues such as clogging and damage at the pressure relief hole, affecting sound quality and user experience due to their simplistic structural design.
Innovation Solution
The earphone design includes a protective net covering the pressure relief hole, with a length of projection greater than 0.4 times the housing component, and may incorporate a first annular protrusion and a waterproof membrane to prevent clogging and ensure stable pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective net is added to cover the pressure relief hole, then the reliability of pressure relief function is improved, but the device complexity increases
Solution Approach 1:
The patent employs a protective net with porous structure to cover the pressure relief hole. The porous material allows air passage while blocking external contaminants, maintaining the pressure relief function's reliability without requiring a complex sealed mechanism. The net's open structure enables continuous pressure equalization while providing protection against clogging.
Solution Approach 2:
The protective net acts as an intermediary element between the external environment and the pressure relief hole. It mediates the interaction by allowing beneficial air flow while blocking harmful particles, thus protecting the pressure relief function without eliminating its core operation. The net serves as a protective mediator that maintains functional integrity.
2Reliability
If the protective net area is increased to more than 1.5 times the opening area, then the resistance to clogging is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent specifies that the protective net area should be more than 1.5 times the opening area, establishing a quantitative parameter relationship. This parameter change provides a clear manufacturing guideline, allowing producers to create nets of appropriate size without excessive complexity. The ratio specification balances protection effectiveness with manufacturability.
3Reliability
If the protective net projection length is increased to more than 0.4 times the housing projection length, then the coverage and protection effectiveness are improved, but the device complexity increases
Solution Approach 1:
The protective net is designed with asymmetric projection characteristics, extending more than 0.4 times the housing projection length in specific directions. This asymmetric design provides enhanced coverage and protection effectiveness in critical areas while avoiding uniform expansion that would increase overall structural complexity. The directional projection focuses protection where most needed.
Data Source
AI summary
The present disclosure provides an earphone, comprising a housing component, a loudspeaker, and a protective net. The housing component is provided with an accommodation cavity and a pressure relief hole. The pressure relief hole is configured to connect the accommodation cavity with an external environment. An opening of the pressure relief hole is disposed at a bottom of the housing component along a height direction. The loudspeaker is disposed in the accommodation cavity. The protective net is connected to the housing component to cover the opening of the pressure relief hole. When projected along the height direction, a length of a projection of the protective net is more than 0.4 times a length of a projection of the housing component.