Receiver-in-canal Hearing Device Connector Assembly
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Solution Overview
Problem
Modern hearing assistance devices face challenges with the reliability, ease of use, and modular replacement of connectors for connected device components, particularly in receiver-in-canal designs.
Innovation Solution
A multi-point sealed connector assembly is developed, featuring a top-loading connector with scratch pads or pins for secure electrical and physical connections, which includes a pliable or rigid design to accommodate various configurations, providing a tamper-resistant locking feature and improved signal transmission through shielded wires, and eliminating the need for tools during assembly or disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional connectors are used in receiver-in-canal hearing devices, then the device can be assembled, but the connections suffer from reliability issues, misalignment problems, and difficulty in modular replacement
Solution Approach 1:
The connector is divided into separate modular components: a fixed connector portion integrated into the hearing device body and a movable connector portion on the cable assembly. This segmentation allows independent optimization of each part and enables easy replacement of the cable assembly without replacing the entire hearing device, directly addressing both reliability and ease of operation.
Solution Approach 2:
A spring-loaded contact mechanism serves as an intermediary between the fixed and movable connector portions. The spring provides continuous contact pressure to maintain reliable electrical connection while accommodating cable movement and assembly tolerances, resolving the contradiction between connection stability and ease of assembly.
2Manufacturing precision
If connectors are made larger to improve connection stability, then alignment accuracy improves, but the device profile increases and tolerances become more restrictive
Solution Approach 1:
The connector design incorporates a spring-loaded movable portion that dynamically adjusts contact pressure and position. This dynamic mechanism allows the connector to accommodate manufacturing tolerances and cable movement without requiring extremely tight tolerances or large connector dimensions, maintaining alignment precision while keeping the device profile compact.
Solution Approach 2:
The spring constant and contact force parameters are optimized to provide sufficient contact pressure for reliable connection while maintaining a compact connector size. By carefully selecting these parameters, the design achieves good alignment precision without increasing the overall device profile.
3Ease of operation
If cable movement is allowed for flexibility, then ease of use improves, but signal loss occurs due to connection instability
Solution Approach 1:
The spring-loaded contact mechanism acts as an intermediary that maintains stable electrical connection despite cable movement. The spring continuously applies contact pressure to compensate for movement, ensuring signal transmission stability while allowing the cable to remain flexible and easy to position.
Solution Approach 2:
The spring mechanism provides beforehand cushioning by pre-loading the contact surfaces with continuous pressure. This pre-applied force compensates for subsequent cable movement, preventing connection instability and signal loss while maintaining cable flexibility for ease of use.
Data Source
AI summary
Disclosed herein, among other things, are methods and apparatus for hearing assistance devices, including, but not limited to connections for receiver-in-canal hearing devices. In various embodiments, a hearing device includes a hearing device component adapted to rest on or behind the ear and hearing assistance electronics disposed in the component. A first connector portion is disposed in the component, the first connector portion electrically connected to the hearing assistance electronics. A second connector portion is adapted to conform to a portion of the component and to electrically and physically connect a cable to the first connector portion. In various embodiments, at least one of the first connector portion and the second connector portion employ scratch pads for contacts. The first connector portion is top loading, in an embodiment.