Dual-Stiffness Antenna Layout for In-Ear Hearing Aids
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Solution Overview
Problem
In-the-ear hearing aids experience significant high-frequency communication loss due to the obstructive effect of the user's head, necessitating improved antenna design to enhance communication with external devices.
Innovation Solution
The hearing aid features a dual-stiffness antenna design with a first section parallel to the housing surface and a second section conforming to the ear canal, encapsulating components like the battery, and utilizing a groove or track to guide the antenna, ensuring minimal contact with the skin and providing a comfortable, functional antenna structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the antenna is made with uniform thickness to ensure structural integrity, then the antenna maintains its shape and electrical performance, but it contacts the skin of the user causing discomfort
Solution Approach 1:
The antenna is designed with varying thickness along its length, creating different local properties. The first section has greater thickness for structural integrity and electrical performance, while the second section has reduced thickness to minimize skin contact and discomfort. This local variation in geometry allows each section to fulfill its specific function optimally.
2Object-affected harmful factors
If the antenna is made flexible to conform to the ear canal shape, then user comfort is improved, but the antenna loses its shape and electrical performance
Solution Approach 1:
Different sections of the antenna have different stiffness characteristics achieved through varying thickness. The first section maintains higher stiffness for shape stability and electrical performance, while the second section has lower stiffness to allow conforming to the ear canal and improve comfort. This spatial variation in mechanical properties resolves the contradiction between flexibility and shape stability.
3Reliability
If the antenna extends away from the housing to improve communication signal, then communication performance is enhanced, but the antenna contacts the skin causing discomfort
Solution Approach 1:
The antenna is designed with a first section that extends from the housing to optimize communication signal, and a second section with reduced thickness that minimizes skin contact. This localized variation in thickness allows the antenna to achieve its communication function while reducing the harmful effect of skin contact in the region where it matters most for comfort.
Data Source
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AI summary
A hearing aid comprising a housing configured to be positioned at the ear canal of a user. The hearing aid may comprise a hearing aid housing comprising a first housing part and an opposite second housing part, wherein the second housing part may be configured to be orientated towards the ear drum of the user. The hearing aid may comprise an antenna extending from the first housing part, the antenna may comprising a first antenna section having first thickness thereby providing the first antenna section with a first stiffness, the first antenna section may be being mechanically attached to the first housing part, the first antenna section may extend substantially parallel to a plane defined at a sound inlet formed in a surface of the first housing part. The antenna may comprise a second antenna section extending from the first antenna section, wherein the second antenna section may be provided with a second thickness providing a second stiffness being lower than the first stiffness.