Biological Electrode Tool Nonwoven Fabric Shielding

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Solution Overview

Problem

Biological electrode tools with exposed conductive portions can lead to unstable detection signals and discomfort due to skin contact, and long lead portions are susceptible to external noise, affecting detection accuracy.

Innovation Solution

The electrode and lead portions are fully bonded with nonwoven fabric on all surfaces except for the contact and external lead-out areas, and a shield layer is applied around the lead wire using an insulating layer to minimize exposure and external noise interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the electrode and lead portions are covered with nonwoven fabric, then the living body feels comfortable and conductive portions are protected, but the conductive portions may still be exposed at the end faces causing signal instability

Engineering Contradiction:

Improvediscomfort and signal instability from exposed conductive portionsVSAvoidcomplexity of covering structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges the electrode portion and lead portion into a single integrated structure where the nonwoven fabric continuously covers both components. The fabric is bonded along full circumferential peripheries to ensure complete coverage of conductive portions while maintaining comfort against the skin, eliminating exposure at the junction between electrode and lead portions.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent segments the coverage structure into distinct bonded and unbonded regions. The nonwoven fabric is bonded along full circumferential peripheries at specific segments (electrode portion and lead portion boundaries) while remaining unbonded at the external lead-out end portion to allow signal output, thus preventing exposure while maintaining functionality.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the lead portion is made long (1 m or longer) for external connection, then the electrode can be positioned far from the output, but external noise affects detection accuracy

Engineering Contradiction:

Improveflexibility in positioning and connectionVSAvoiddetection accuracy affected by external noise

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent introduces a shield layer as an intermediary component between the lead wire and external environment. This shield layer acts as a mediator that blocks external noise from reaching the lead wire, allowing the lead portion to be long for flexible positioning while maintaining detection accuracy through noise protection.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the nonwoven fabric is fully bonded to cover all conductive portions, then exposure is prevented, but the external lead-out end portion cannot be accessed

Engineering Contradiction:

Improveexposure of conductive portionsVSAvoidaccessibility of external lead-out end

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent applies different bonding qualities to different regions of the nonwoven fabric. The fabric is fully bonded along full circumferential peripheries at the electrode portion and lead portion boundaries to prevent exposure, while the external lead-out end portion remains unbonded to allow access and connection, thus achieving local optimization of both protection and accessibility.

Inventive Principle:

Principle #3Local quality

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 prevents signal instability and discomfort by ensuring no conductive portions are exposed, while the shield layer enhances signal quality by reducing external noise, thereby increasing the signal-to-noise ratio and reducing overall device costs.

Implementation Method 1

the biological electrode tool according to the present invention is configured to shield external noise by means of a shield layer provided around the lead wire on the entire circumferential surface of the lead portion via an insulating layer

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Implementation Method 2

full circumferential peripheries of the nonwoven fabrics on the upper and lower surfaces of the electrode portion and the lead portion are bonded via an adhesive layer

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS10835140B2Biological electrode tool

Publication Date: 2020.11.17 TATSUTA ELECTRICWIRE & CABLE

AI summary

Provided is a biological electrode tool including an electrode portion (10) attached to a human body to acquire a biological signal, and a lead portion (20) for externally leading out the biological signal from the electrode portion (10). The entire areas of the upper and lower surfaces of the electrode portion (10) are covered with a nonwoven fabric (30) except for a portion that contacts the living body (13). The entire areas of the upper and lower surfaces of the lead portion (20) are also covered with nonwoven fabric except for an external lead-out end portion (14). The full circumferential peripheries of the nonwoven fabrics (30) on the upper and lower surfaces of the electrode portion (10) and the lead portion (20) are bonded except for the portion that contacts the living body (13) and the external lead-out end portion (14). Neither the electrode (11) of the electrode portion (10) nor a thin-film lead wire (21) of the lead portion (20) are exposed.