Three-Coil Round Window Vibrator Driving Force
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Solution Overview
Problem
Existing round window driving vibrators, particularly those using electromagnetic methods, face challenges in achieving high frequency characteristics and sufficient driving force, especially for individuals with sensorineural hearing loss, due to limitations in power consumption and spatial restrictions.
Innovation Solution
A three-coil type round window driving vibrator is designed with a permanent magnet having three poles and coils wound around its outer periphery, where the direction of electric current through adjacent coils is opposite, enhancing driving force and frequency characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If electromagnetic vibrator is used in round window driving, then hearing aid function is provided, but driving force is insufficient especially in high frequency band
Solution Approach 1:
The single coil is divided into three separate coils (first, second, and third coils) positioned at different locations around the permanent magnet. Each coil independently generates electromagnetic force, and their combined effect produces sufficient driving force across all frequency bands, particularly improving high frequency characteristics.
Solution Approach 2:
The three coils are combined to work together with the permanent magnet having three poles (N-S-N or S-N-S configuration). The coils are arranged such that their magnetic forces are merged and act in the same direction, producing enhanced driving force that overcomes the limitations of single-coil electromagnetic vibrators.
2Force
If coil current direction is made opposite in adjacent coils, then driving force is increased, but device complexity increases
Solution Approach 1:
Each coil is assigned a specific current direction based on its local position around the permanent magnet. The first coil has current flowing in one direction while the second and third coils have current flowing in the opposite direction. This localized differentiation optimizes the magnetic force generation at each position while maintaining overall system simplicity.
Solution Approach 2:
The coil configuration uses asymmetric current directions rather than uniform current flow. The first coil carries current in the opposite direction compared to the second and third coils, creating an asymmetric but balanced electromagnetic force distribution that maximizes driving force while keeping the structure manageable.
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 increases driving force and reduces power consumption, enabling a more efficient and compact implantable artificial middle ear hearing aid that effectively addresses the limitations of existing technologies.
Implementation Method 1
a round window driving vibrator, which includes a permanent magnet having three poles of SNS or NSN; a coil member wound around an outer periphery of the permanent magnet
Implementation Method 2
the direction of electric current flowing through one of the coils is opposite to the direction of the electric current flowing through another coil adjacent thereto, in order to increase driving force
Data Source
AI summary
The present disclosure provides a three-coil type round window driving vibrator, which includes a permanent magnet having the same magnetic poles adjoining each other and is designed to allow electric current flowing through coils to run in opposite directions in order to increase driving force without being affected by an external magnetic field. The round window driving vibrator includes a permanent magnet having three poles of SNS or NSN, a coil member wound around an outer periphery of the permanent magnet, and a vibration member connected to one end of the permanent magnet. Here, the coil member includes a first coil wound around a middle section of the permanent magnet and second and third coils wound around upper and lower sections of the permanent magnet, respectively.