Hearing Device Charger Coupling for Accurate Insertion Detection

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Solution Overview

Problem

Existing hearing device charging systems face challenges in accurately detecting the insertion of a hearing device into a charging device, leading to potential over-charging, overheating, and feedback whistling issues.

Innovation Solution

A system comprising a hearing device and a charging device with a coupling structure that includes a conducting element and a ground plane, where the frequency response of the conducting element is modified upon insertion of the hearing device, enabling near-field coupling and detection of the hearing device's presence, thereby initiating communication and preventing feedback whistling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the hearing device is placed in the charging device for charging, then the rechargeable battery can be charged, but the hearing device may produce feedback whistling and the charging device may not accurately detect the insertion status

Engineering Contradiction:

Improvecharging safetyVSAvoidfeedback whistling

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies preliminary action by detecting the hearing device's presence in the charging device before initiating charging. The detection mechanism uses the coupling structure's frequency response characteristics to identify insertion status, ensuring the device is properly positioned and ready for charging before power transfer begins, thereby preventing feedback whistling and charging errors

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by continuously monitoring the frequency response of the coupling structure during the charging process. The system compares the actual frequency response against expected values to verify proper device insertion and maintain optimal coupling conditions, adjusting charging parameters as needed to prevent feedback whistling and ensure reliable charging

Inventive Principle:

Principle #23Feedback

2Measurement precision

If traditional charging detection methods are used, then the charging process can be initiated, but the detection is sensitive to environmental parameters and may lead to over-charging or overheating

Engineering Contradiction:

Improveinsertion detection accuracyVSAvoidenvironmental sensitivity

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces traditional mechanical or simple electrical contact-based detection methods with an electromagnetic field-based detection system. The coupling structure utilizes electromagnetic coupling between the hearing device antenna and the charging device's conducting element, detecting insertion through frequency response characteristics rather than physical contact, thereby eliminating sensitivity to environmental parameters like contact pressure or oxidation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent applies parameter changes by monitoring the frequency response characteristics of the coupling structure as the primary detection parameter. The system detects insertion status and charging conditions by measuring changes in resonant frequency, impedance, or coupling strength, providing precise and environmentally robust detection that prevents over-charging and overheating

Inventive Principle:

Principle #35Parameter changes

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

This solution allows for precise detection of the hearing device's insertion, enabling safe charging and preventing feedback whistling, while being less sensitive to environmental parameters.

Implementation Method 1

enabling near-field coupling of the hearing device antenna to the conducting element

Methodology Applied

Scientific EffectNear-field coupling: Electromagnetic Induction

Data Source

PatentEP4489430A1A system comprising a hearing device and a charging device, a charging device and a method of charging a hearing device

Publication Date: 2025.01.08 GN HEARING AS

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AI summary

Disclosed is a system comprising a hearing device and a charging device. The hearing device comprises a hearing device antenna, a hearing device wireless communication unit, the hearing device wireless communication unit being coupled to the hearing device antenna, the hearing device wireless communication unit and the hearing device antenna being configured for transmission and reception of electromagnetic signals at a first frequency. The hearing device further comprises a rechargeable battery configured to be charged by the charging device. The charging device being configured to receive the hearing device to enable charging of the hearing device. The charging device comprises a charging device wireless communication unit, the charging device wireless communication unit being interconnected with a coupling structure. The coupling structure comprises a conducting element and a ground plane, the ground plane being positioned within a first distance of the conducting element. The coupling structure is configured so that upon reception of the hearing device in the charging device, a frequency response of the conducting element is modified thereby enabling near-field coupling of the hearing device antenna to the conducting element.