Open Earphone Geometry for Comfort and Sound Leakage Control
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Solution Overview
Problem
Existing earphones often compromise wearing comfort and output performance due to their design, particularly when worn for extended periods.
Innovation Solution
The open earphone design incorporates a sound production component and an ear hook with specific geometric ratios and projections to fit comfortably around the auricle, extending into the auricular concha without blocking the ear canal, and utilizing a quasi-cavity structure for enhanced sound delivery and leakage cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the earphone blocks the ear canal to improve sound output, then sound isolation is improved, but wearing comfort and ambient sound awareness deteriorate
Solution Approach 1:
The earphone design separates the sound delivery path from the ear canal blockage. The sound production component extends into the auricular concha cavity to deliver sound directly to the ear canal opening, while the ear hook structure segments the佩戴 area to avoid blocking the ear canal, thus maintaining both sound output performance and wearing comfort
2Ease of operation
If the earphone structure is extended into the auricular concha to improve stability, then wearing comfort is improved, but device complexity increases
Solution Approach 1:
The sound production component is nested within the auricular concha cavity, utilizing the natural ear structure as a housing. This nesting approach improves stability and wearing comfort by leveraging the ear's existing geometry, while avoiding the need for additional complex external structures
3Ease of operation
If the ear hook is designed with specific geometric ratios to fit the auricle, then wearing comfort and stability are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies particular parameter ranges for the ear hook geometry (ratios between 0.25-0.6 and 0.4-0.7) rather than exact values. This parameter change approach allows for manufacturing flexibility while still achieving optimal wearing comfort and stability, reducing the stringency of manufacturing precision requirements
Data Source
AI summary
Disclosed is an open earphone, comprising a sound production component and an ear hook. The ear hook may include a first portion and a second portion connected in sequence. The first portion may be hung between the auricle of a user and the head of the user, the second portion may extend toward a front outer side of the auricle and connect the sound production component, and the sound production component may be located close to the ear canal but not block the opening of the ear canal; wherein the sound production component and the auricle may have a first projection and a second projection on a sagittal plane, respectively, a centroid of the first projection may have a first distance from a highest point of the second projection in a vertical axis direction, a ratio of the first distance to a height of the second projection in the vertical axis direction may be within a range of 0.25-0.6, the centroid of the first projection may have a second distance from an end point of the second projection in a sagittal axis direction, and a ratio of the second distance to a width of the second projection in the sagittal axis direction may be within a range of 0.4-0.7.