Hearing Aid Locking Plug Localized Tolerance Design
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Solution Overview
Problem
Hearing aid devices require fine tolerances for optimal component fit, but this increases production costs and complexity, making it challenging to achieve high sound quality while minimizing production expenses.
Innovation Solution
The hearing aid device incorporates a locking plug with a U-shaped design that interlocks the frame structure and housing, concentrating fine production tolerances in this component while allowing other parts to have rougher tolerances, ensuring a good fit without increasing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine tolerances are applied to all components, then fit quality between components is improved, but production costs increase
Solution Approach 1:
The patent applies fine tolerances only to the locking plug and its engagement surfaces with the frame and housing, while other components can be manufactured with rougher tolerances. This localized approach to precision concentrates manufacturing quality requirements where they are most needed for functional integrity, thereby reducing overall production costs while maintaining component fit quality.
Solution Approach 2:
The locking plug combines multiple functions into a single component: it locks the connector plug in the socket, interlocks the frame structure with the housing, and provides structural support. By merging these functions into one component, the patent reduces the number of parts requiring fine tolerances, thereby lowering production costs while maintaining overall assembly quality.
2Reliability
If fine tolerances are applied to all components, then sound quality is improved, but device complexity increases
Solution Approach 1:
The locking plug integrates multiple structural and functional elements into a single component that simultaneously achieves frame-housing interlocking, connector securing, and sound path integrity. This merging reduces the total number of components and assembly steps while maintaining sound quality, thereby reducing device complexity.
3Stability of the object's composition
If multiple components are used for interlocking, then structural stability is improved, but ease of assembly is worsened
Solution Approach 1:
The locking plug consolidates multiple interlocking functions into a single component that provides both frame-housing connection and connector securing. This reduces the number of assembly operations required while maintaining structural stability, thereby improving ease of assembly.
Solution Approach 2:
The locking plug features self-aligning engagement surfaces and elastic elements that automatically guide the assembly process, allowing the component to find its correct position without requiring precise manual alignment. This self-service characteristic simplifies assembly operations while maintaining structural stability.
Data Source
AI summary
A hearing aid device includes: a hearing aid housing surrounding an inner space; a frame structure arranged in the inner space, the frame structure configured for mounting at least a microphone and a signal processing unit; a sound emitter sized for being arranged in an ear canal; a conductor, wherein the sound emitter is arranged on a first end of the conductor; a connector socket arranged in the frame structure, wherein the hearing aid housing comprises a passage located in front of the connector socket; a connector plug arranged on a second end of the conductor, the connector plug configured for insertion through the passage for connection to the connector socket; a recess at an outer surface of the connector plug; and a locking plug having a first part configured to extend through a housing opening at the hearing aid housing, and engage with the recess.