Universal Earpiece Design for Comfortable Fit

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Solution Overview

Problem

Existing earpieces fail to provide a universal fit, leading to irritation, acoustic feedback, and poor retention due to their inflexible materials and inability to conform to changing ear shapes during jaw movement, resulting in a high return rate of hearing aids and discomfort.

Innovation Solution

A standard-fit, crescent-shaped earpiece (C-shell) design that contacts four major points of the outer ear - the concha bowl, tragus, anti-tragus, and helix - allowing for flexibility and comfort without the need for custom molds, using materials like acrylic, plastic, or silicone, and incorporating a helix extension and ear canal extension for secure placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a hard, incompressible acrylic material is used to house electronic components, then structural strength and durability are improved, but the earpiece cannot conform to changing ear shapes during jaw movement, causing poor fit and irritation

Engineering Contradiction:

Improvestructural strengthVSAvoidadaptability to ear shape changes

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The earpiece is divided into two distinct segments: a hard, incompressible acrylic shell that maintains structural strength and houses electronic components, and a soft, flexible tip that can conform to changing ear shapes. This segmentation allows each part to perform its specific function optimally without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The earpiece combines two different materials with complementary properties: hard acrylic for the shell portion requiring strength and durability, and soft flexible material for the tip portion requiring adaptability. This composite construction resolves the contradiction by allowing both material types to coexist in their respective functional zones.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If a soft shell is used to conform to ear canal changes during jaw motion, then adaptability is improved, but the shell tends to tear apart and wires break

Engineering Contradiction:

Improveflexibility during jaw motionVSAvoidstructural integrity

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the earpiece have different material properties tailored to their specific functional requirements. The shell portion uses hard acrylic for strength and durability, while the tip portion uses soft flexible material for conformability. This local differentiation of material quality resolves the contradiction by applying the right property to the right location.

Inventive Principle:

Principle #3Local quality

3Productivity

If standard fitting earpieces are used to reduce product cost and delivery time, then manufacturing efficiency is improved, but proper fit is not achieved for all ears, resulting in irritation and acoustic feedback

Engineering Contradiction:

Improvedelivery speedVSAvoidfit quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The earpiece design achieves universal applicability across different ear types through its distinctive crescent shape and four-point contact configuration. The standardized design provides reliable fit for the majority of users without requiring custom molding, thus achieving both rapid delivery and acceptable fit quality simultaneously.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent optimizes specific geometric parameters of the earpiece, including the crescent shape and the positioning of four contact points (concha bowl, tragus, anti-tragus, and helix), to achieve universal fit. By carefully selecting these dimensional parameters, the design achieves reliable fit across diverse ear anatomies while maintaining standardized manufacturing.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If the earpiece contacts four major points of the outer ear, then retention and comfort are improved, but the device complexity increases

Engineering Contradiction:

Improveretention stabilityVSAvoidstructural complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The earpiece employs a crescent-shaped curved structure that naturally conforms to the contours of the outer ear. This curved geometry enables the device to contact four major points (concha bowl, tragus, anti-tragus, and helix) for stable retention while maintaining a relatively simple overall structure. The curvature is designed to match the ear's anatomy, achieving reliable fit without excessive structural complexity.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS10212525B2Universal earpiece

Publication Date: 2019.02.19 BLUE GEAR

AI summary

An earpiece designed to fit a substantial majority (over 90%) of people without customization to the outer ears, i.e., without the need to make customized measurements or a mold of the actual ear of an individual.