3D-Custom Charger Insert for Hearing Instrument Alignment
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Solution Overview
Problem
Existing hearing instrument chargers often face issues with correctly positioning charger elements, leading to interrupted or slowed charging processes due to misalignment, and there is a need for a customizable, low-cost, fast, and simple manufacturing method for charger insert parts that meet biocompatibility and medical grade requirements.
Innovation Solution
A method involving 3D manufacturing to create customized charger insert parts with holders, based on virtual models derived from ear canal shapes and charger device data, ensuring precise alignment of charger elements for stable charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standardized holder design is used in hearing instrument chargers, then manufacturing cost is reduced and production is simplified, but charger element alignment precision deteriorates leading to interrupted or slowed charging processes
Solution Approach 1:
The holder is pre-shaped using 3D manufacturing processes (such as 3D printing or molding) to incorporate alignment features and geometric constraints that automatically guide the charger elements into correct positions. This preliminary shaping of the holder structure enables precise alignment to be built-in during manufacturing rather than requiring post-assembly adjustment, thus maintaining manufacturing simplicity while achieving alignment precision.
2Ease of operation
If custom-fitted hearing instruments are manufactured for each user's ear canal shape, then comfort and fit are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The manufacturing process utilizes digital modeling and 3D manufacturing technologies that allow rapid customization of hearing instrument parameters (such as shell geometry, vent positioning, and component placement) based on individual ear canal scans. By changing digital design parameters rather than physical manufacturing processes for each custom fit, the system achieves user-specific comfort while keeping manufacturing complexity manageable through standardized digital workflows and automated fabrication.
3Manufacturing precision
If 3D manufacturing processes are used to create customized charger insert parts, then alignment precision of charger elements is improved, but manufacturing time and cost may increase
Solution Approach 1:
The holder design incorporates pre-planned alignment features and geometric constraints that are built into the 3D model before manufacturing. This preliminary design phase includes allocating specific positions for charger elements based on the hearing instrument's geometry, allowing the 3D manufacturing process to directly produce accurately positioned components in a single operation, thereby maintaining both precision and manufacturing efficiency.
Solution Approach 2:
The 3D manufacturing process creates precise digital copies or replicas of the required charger holder geometry based on virtual models. By using digital modeling and simulation to verify alignment before physical production, the system achieves high positioning precision while minimizing iterative manufacturing cycles, thus improving productivity alongside precision.
Data Source
AI summary
A method of manufacturing a charger insert part of a hearing instrument charger device comprising a charger casing having a receiving portion, and a first charger element, includes: obtaining a first virtual model of the rechargeable hearing instrument shaped or to be shaped to at least partly conform to a shape of a portion of an ear canal of a user, wherein the first virtual model comprises an allocated position for a second charger element; obtaining a second virtual model of the charger insert part for manufacturing the charger insert part, such that when the charger insert part is placed in the receiving portion, the first charger element will be in a relation with the second charger element; and shaping, by a manufacturing process, the charger insert part based on the second virtual model, the second virtual model being based on the first virtual model.