Flexible Electronics Module for Compact In-Ear Hearing Aid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In-the-ear hearing aids face challenges in optimizing space utilization and aligning components like telephone coils, leading to defective communication due to labor-intensive assembly and limited space adaptation.
Innovation Solution
A flexible supporting structure secures all electronic components, forming a removable module that can be adapted to individual housing shells, allowing for compact design, optimal component alignment, and improved electromagnetic compatibility through integrated wiring and modular assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pre-assembled electronics modules are integrated into custom shells, then assembly time is reduced, but space utilization becomes suboptimal and component alignment (especially telephone coils) cannot be individually adapted
Solution Approach 1:
The hearing aid is divided into two main segments: a reusable electronics module containing all electronic components mounted on a supporting structure, and a custom-molded shell adapted to the individual auditory canal. This segmentation allows the electronics module to be manufactured once and reused across multiple custom shells, improving productivity while maintaining adaptability through the modular design that enables precise alignment of components like telephone coils in each custom shell.
Solution Approach 2:
The electronics module is pre-assembled with all electronic components (amplifier, microphone, receiver, battery, telephone coil) mounted on the supporting structure before insertion into the custom shell. The telephone coil is pre-aligned in the correct orientation on the supporting structure, eliminating the need for time-consuming alignment work after shell fabrication. This preliminary preparation resolves the contradiction by enabling fast assembly without sacrificing alignment quality.
2Volume of moving object
If the hearing aid is made smaller to optimize fit in the auditory canal, then comfort and discretion are improved, but the range of functions and component placement options are limited
Solution Approach 1:
The supporting structure is designed as a three-dimensional framework that utilizes the available space within the small hearing aid shell more effectively. By mounting components on the supporting structure in three dimensions rather than spreading them out in two dimensions, the design accommodates more functions (amplifier, microphone, receiver, battery, telephone coil) within a compact volume, resolving the contradiction between size and functionality.
Solution Approach 2:
The supporting structure serves multiple functions simultaneously: it provides mechanical support for all electronic components, acts as a mounting platform for the telephone coil, serves as a structural element of the hearing aid, and enables compact arrangement of components. This multi-functionality allows a full range of features to be integrated into a small hearing aid, resolving the contradiction between size and adaptability.
3Adaptability or versatility
If telephone coils and antennae are aligned after fitting into individual shells, then custom fit is achieved, but communication between hearing aid and telephone becomes defective due to misalignment
Solution Approach 1:
The telephone coil is pre-aligned in the correct orientation and position on the supporting structure during electronics module assembly, before the module is inserted into the custom shell. This preliminary alignment ensures that the telephone coil is correctly positioned for optimal communication, eliminating the alignment problems that would occur if adjustment were attempted after fitting. The custom shell is then molded to accommodate this pre-aligned module, maintaining both custom fit and communication reliability.
4Volume of moving object
If wiring elements are integrated into the supporting structure using insert molding, then space is saved and EMC is improved, but repairability becomes more difficult
Solution Approach 1:
The hearing aid is segmented into a reusable electronics module with integrated wiring and a custom shell. The wiring elements are integrated into the supporting structure within the electronics module using insert molding, which saves space and improves EMC. If repair is needed, the entire electronics module can be replaced rather than attempting to repair individual wiring elements, making the system easier to maintain despite the integrated wiring design.
Data Source
AI summary
An in-the-ear hearing aid is to have a more compact design. For this purpose there is inserted into a housing shell an electronics module having all the electronic components of the hearing aid, the electronic components being secured to a flexible supporting structure. As a result of the open construction of the electronics module, the individual electronic components can be compactly inserted with short stranded wires, thus also increasing electromagnetic compatibility. The flexibility of the supporting structure enables allowance to be made for individually differing auditory canal shapes.