Detachable Hearing Aid Speaker Connector for Stable Ear Canal Insertion
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Solution Overview
Problem
Hearing aid connectors face challenges in maintaining stability and alignment in harsh environments, such as the presence of fluids and wax, leading to potential misalignment and reduced lifespan, especially in devices with expected lifetimes of around 5 years.
Innovation Solution
A plug and socket connector system with a loop and protrusion structure providing a retention force of 5-15 N, made from materials like PEEK or nylon, which ensures secure connection without tools, and a sealing arrangement using silicone to protect against ear-related chemicals, ensuring mechanical alignment and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a detachable speaker unit with connector is used to allow different types and lengths, then adaptability is improved, but connection stability and alignment reliability deteriorate in harsh environments
Solution Approach 1:
The connector employs asymmetric features including a loop structure positioned at one end and a protruding structure at another, with specific geometric asymmetry in the engagement surfaces. This asymmetric design ensures unidirectional insertion and prevents misalignment, while the loop-protrusion mechanism provides asymmetric force distribution that enhances connection stability against detachment forces.
Solution Approach 2:
The loop structure incorporates curved geometry with specific radius of curvature, and the protruding structure features rounded edges and arcs. These curved elements distribute mechanical stresses more evenly during insertion and engagement, reducing stress concentration points that could lead to failure in harsh environments with fluids and wax.
2Duration of action of stationary object
If connector materials are selected for chemical resistance, then durability in harsh environments is improved, but mechanical strength and retention force may worsen
Solution Approach 1:
The connector assembly utilizes composite material construction with the housing made from chemically resistant materials such as PEEK or nylon that provide durability in harsh environments. The loop and protruding structures are made from materials optimized for mechanical strength and elastic recovery. This composite approach allows each component to be made from materials best suited for its specific functional requirements.
Solution Approach 2:
The design incorporates parameters such as loop thickness, protrusion dimensions, and engagement geometry that can be adjusted to optimize the balance between chemical resistance and mechanical strength. By carefully controlling these geometric parameters, the connector achieves sufficient retention force (5-15 N) while maintaining durability through material selection.
3Reliability
If a loop and protrusion structure is used to provide retention force, then connection stability is improved, but device complexity increases
Solution Approach 1:
The loop structure and protruding structure are integrated into a single connector assembly, combining multiple functions into unified geometric features. The loop serves both as a mechanical engagement element and as part of the sealing structure, while the protruding structure simultaneously provides alignment and retention functions. This merging reduces the number of separate components needed.
Solution Approach 2:
The loop-protrusion mechanism is designed to be self-aligning and self-retaining. The geometric features automatically guide the connector into proper alignment during insertion and maintain connection stability without requiring additional active components or complex control mechanisms. The elastic properties of the loop provide automatic retention force.
4Length of moving object
If connector size is reduced to minimize visibility, then aesthetic appearance is improved, but manufacturing precision and alignment tolerance worsen
Solution Approach 1:
The protruding structure is designed to engage with a corresponding recess in the hearing device housing before the main body of the connector is fully inserted. This preliminary engagement establishes alignment and positional reference early in the insertion process, ensuring accurate positioning even in miniaturized connectors with tight tolerances.
Solution Approach 2:
The connector design utilizes multiple dimensional features including the loop structure in one plane and the protruding structure in another, creating a multi-dimensional engagement system. This approach allows for compact overall dimensions while maintaining sufficient alignment tolerance through the distributed geometric features across different spatial dimensions.
Data Source
AI summary
The present disclosure relates to a hearing aid and detachable speaker unit assembly. The detachable speaker unit assembly comprises a fastening structure to provide an enhanced removal force and stable insertion into the ear canal of the user.