Bioelectrode Needle Coupling Bar Stress Relief

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Solution Overview

Problem

Existing bioelectrode components face issues with needle parts separating from the biological surface due to noise interference and movement, and micro needles require adhesive films for fixation, which can lead to instability in signal measurement and medication delivery.

Innovation Solution

A bioelectrode component design featuring a metal plate with openings, a coupling bar, and a needle part protruding from the coupling bar, where the needle part is coupled to the inner wall of the opening, allowing the coupling bar to relieve stress from movement and prevent separation from the biological surface, with an adhesive film for fixation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a micro needle is fixed to the skin by an adhesive film, then the needle can be attached to the skin, but the needle parts may separate from the skin by routine movement

Engineering Contradiction:

Improveneedle attachment stabilityVSAvoidneedle position stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The needle is designed with a flexible shaft that can dynamically adapt to skin movements. The flexible shaft allows the needle to bend and flex with routine body movements while maintaining penetration, preventing separation that would occur with rigid fixed-needle designs.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The needle incorporates a flexible shaft structure that can deform elastically to accommodate skin movement. This flexibility allows the needle to maintain contact and penetration through the skin surface during routine movements, solving the separation problem inherent in rigid adhesive-fixed designs.

Inventive Principle:

Principle #30Flexible shells and thin films

2Ease of operation

If an electrode pad is contacted to the skin surface, then the electrode can be applied to the body, but the electrode pad is likely to be influenced by noise and cannot obtain correct information

Engineering Contradiction:

Improveelectrode application easeVSAvoidbiosignal measurement accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The invention replaces the conventional surface-contact electrode pad mechanism with a microneedle penetration mechanism. By substituting the mechanical contact method (surface pad) with a penetration method (needle through skin), the system achieves better electrical contact and reduced noise interference, improving measurement precision while maintaining ease of application.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10588533B2Bioelectrode component

Publication Date: 2020.03.17 SHINKO ELECTRIC IND CO LTD

AI summary

A bioelectrode component includes an electrode member. The electrode member includes a metal plate, a coupling bar, and a needle part. The metal plate includes a first surface and a second surface opposite to the first surface, and includes an opening formed in the metal plate. The coupling bar extends inward from an inner wall of the opening. The needle part is arranged at a leading end of the coupling bar and protrudes toward the first surface of the metal plate.