Hearing Device Charging Contact Assembly with Control Detection
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Solution Overview
Problem
Existing charging systems for hearing devices lack reliable detection mechanisms for proper contact between the hearing device and the charging unit, leading to potential issues such as incomplete charging, accidental activation, and feedback noise.
Innovation Solution
A charging contact assembly with a first and second charging contact, and a control contact, which forms a contact pair for galvanic charging and is used to detect proper contact through a bridging mechanism, allowing the charging controller to deactivate the hearing device during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If galvanic charging contacts are used for charging hearing devices, then the implementation is simple and requires fewer components, but reliable detection of proper contact is difficult to achieve
Solution Approach 1:
The charging contact assembly is segmented into multiple independent contacts: first and second charging contacts for power transfer, and a separate control contact for detection. This segmentation allows the control contact to independently verify proper contact without interfering with the charging function, resolving the contradiction between simple implementation and reliable detection.
Solution Approach 2:
A control contact serves as an intermediary element that mediates between the charging contacts and the hearing device controller. It provides a dedicated detection path that bridges the gap between physical contact and reliable detection, enabling the system to distinguish between proper and improper contact scenarios.
2Object-affected harmful factors
If the hearing device is deactivated during charging based on charging current detection, then feedback noise is avoided, but unreliable contact detection may cause accidental activation or incomplete charging
Solution Approach 1:
The system implements feedback through the control contact that provides real-time information about contact status to the controller. This feedback mechanism allows the controller to make accurate decisions about device activation/deactivation during charging, preventing both feedback noise from improper contact and ensuring proper charging when contacts are correct.
Solution Approach 2:
The control contact establishes preliminary verification of proper contact before the charging process fully commences. This preliminary action ensures that the hearing device is in the correct state for charging, preventing accidental activation or incomplete charging scenarios.
3Reliability
If a control contact is added to detect proper contact, then contact detection reliability is improved, but device complexity increases
Solution Approach 1:
The control contact is designed with multi-functionality, serving both as a detection element and as part of the overall charging contact assembly structure. This universal approach allows the system to achieve reliable detection without proportionally increasing complexity, as the control contact integrates seamlessly with the existing charging contact architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables reliable detection of proper contact between the hearing device and the charging unit, ensuring safe and efficient charging, preventing feedback noise, and allowing for reliable control of the hearing device system.
Implementation Method 1
The charging controller is designed to detect proper contact from bridging between the control contact and the first charging contact
Data Source
AI summary
A charging contact assembly for a hearing device system. The assembly has a first charging contact which is accessible on an outer side for contacting with a first mating contact of a mating contact assembly, and a second charging contact which is accessible on the outer side for contacting with a second mating contact of the mating contact assembly. Furthermore, the charging contact assembly has a control contact which is galvanically isolated on the outer side from the first and the second charging contacts, and a charging controller which is configured to detect a proper contacting of the first and second charging contacts with the corresponding mating contact based on contact with the control contact.