In-Ear Earphone Tip Mounting to Reduce Auditory Canal Pressure
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Solution Overview
Problem
Existing in-ear earphones suffer from reduced wearing comfort due to the rigid nozzle and limited flexibility of the tube, causing pressure points and discomfort in the auditory canal.
Innovation Solution
The attachment of the earpad is redesigned to eliminate the hard nozzle, with a softer tube being fixed in the housing, allowing the earpad to adapt freely to the auditory canal and reduce pressure points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hard nozzle is used to mechanically attach the earpad and specify the angle between housing and earpad, then mechanical attachment strength and angular specification are improved, but wearing comfort deteriorates due to pressure points in the auditory canal
Solution Approach 1:
The patent removes the hard nozzle component from the housing and eliminates it entirely from the system. Instead of having the housing protrude into the earpad with a rigid nozzle, the earpad's tube is directly fixed into the housing opening, extracting the harmful rigid intermediate component that caused pressure points.
Solution Approach 2:
The attachment relationship is inverted: traditionally the hard housing nozzle attached to the soft earpad, but now the soft earpad tube is fixed directly into the housing, reversing which component initiates the attachment and eliminating the hard protruding element.
2Manufacturing precision
If a rigid nozzle is used to specify the exact angle between earphone housing and earpad, then angular precision is improved, but adaptability to individual auditory canals deteriorates
Solution Approach 1:
The patent applies different rigidity qualities to different parts of the system: the housing maintains its structural rigidity for angular specification, while the earpad tube is made flexible to adapt to individual auditory canals. This local differentiation of material properties resolves the contradiction between precision and adaptability.
Solution Approach 2:
The earpad tube is designed with dynamic flexibility allowing it to bend and adapt to the user's auditory canal shape, while the housing remains static and rigid to maintain the specified angle. This dynamic element enables both precision mounting and individual adaptation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances wearing comfort by allowing the earpad to conform better to the auditory canal, reducing discomfort and assembly parts, while providing geometric design freedom.
Implementation Method 1
the softer receiving tube of the earpad is fixed in the housing. This measure allows the earpad to adapt more freely to the auditory canal and to exert less pressure on it
Data Source
AI summary
To secure earphones in the auditory canal of a user, ear tips are used. In an improved earphone, which reduces or avoids pressure sores occurring in the ear of the user, a hard stub of the housing no longer protrudes as hitherto into the ear tip, and instead a soft receiving tube of the ear tip is secured in the housing. By means of this inverse receiving principle, the ear tip can better conform to the auditory canal and thus enhances the wearing comfort. For assembly, the tube is plugged into an opening in the housing so that a projection of the tube engages in a depression or inner shoulder behind the opening and thus secures the ear cushion on the housing.