Cochlear Implant Headpiece Antenna Positioning
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Solution Overview
Problem
Existing cochlear implant headpieces have a significant distance between the headpiece antenna and the skin, which increases the distance to the implantable device antenna, leading to inefficient power transmission and limiting compatibility with varying skin thicknesses.
Innovation Solution
The headpiece is designed with the antenna positioned closer to the skin by integrating it into the bottom wall of the housing, reducing the distance between the headpiece antenna and the skin, and using a positioning magnet assembly to maintain the antenna's position over the implantable device antenna, allowing for more efficient power transmission and broader compatibility with different skin thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the antenna is positioned in a conventional location within the headpiece housing, then the headpiece structure is simple and easy to manufacture, but the distance between the headpiece antenna and the skin is large, resulting in inefficient power transmission
Solution Approach 1:
The antenna is integrated into the bottom wall of the headpiece housing, transitioning from a conventional internal position to a position at the boundary dimension (the skin interface). This dimensional repositioning reduces the distance between the headpiece antenna and the skin, improving power transmission efficiency without significantly complicating the manufacturing process.
2Loss of energy
If the headpiece antenna is positioned closer to the skin, then power transmission efficiency improves, but the headpiece requires more precise positioning and integration structures
Solution Approach 1:
The antenna is merged with the bottom wall of the headpiece housing, combining two previously separate components (antenna and housing wall) into a single integrated structure. This integration eliminates the need for separate positioning mechanisms and reduces manufacturing precision requirements while maintaining the antenna's close proximity to the skin for efficient power transmission.
3Length of stationary object
If the antenna is integrated into the bottom wall of the housing, then the distance between the headpiece antenna and the skin is reduced, but the housing structure becomes more complex
Solution Approach 1:
The antenna is merged with the bottom wall of the housing, combining these components into a single integrated structure. This integration reduces the antenna-to-skin distance to minimal thickness while avoiding the need for separate mounting brackets, adhesives, or positioning mechanisms, thereby limiting the increase in housing structure complexity.
4Loss of energy
If the headpiece antenna is positioned closer to the implantable device antenna, then power transmission efficiency improves, but the headpiece must accommodate varying skin thicknesses
Solution Approach 1:
The integration of the antenna into the bottom wall creates a dynamic adaptation system where the antenna-to-skin distance automatically adjusts to match the patient's skin thickness. This eliminates the need for manual adjustment or multiple sizing options, as the minimal thickness design adapts to varying skin thicknesses across different patients, maintaining optimal power transmission efficiency for each individual.
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 configuration results in a 30% reduction in antenna-to-antenna spacing and a 90% reduction in headpiece antenna-to-skin spacing, enhancing power transmission efficiency and enabling the headpiece to be used with a wider range of skin thicknesses, thus accommodating a broader patient population.
Implementation Method 1
Communication between the headpiece and the implantable device is accomplished by way of an antenna carried on the printed circuit board within the headpiece housing and an antenna in the implantable device
Implementation Method 2
using a positioning magnet assembly to maintain the antenna's position over the implantable device antenna
Data Source
Figure 1
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Figure 6~8
AI summary
Cochlear implant headpieces with improved antenna positioning.