Biological Sensor Mounting Substrate Segmentation

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Solution Overview

Problem

Conventional biological information measurement devices using flexible substrates for attachment to the skin become uncomfortable due to inhibition of skin displacement during daily activities, causing discomfort as the substrate bends and restricts skin movement.

Innovation Solution

A biological information measurement system with a stretchable adhesive tape and cover, where the mounting substrate is held by a substrate holding portion on the top side of the adhesive tape, allowing the device to conform to the skin and accommodate body movements without hindering skin displacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a flexible substrate is used as mounting substrate to conform to body shape, then initial attachment comfort is improved, but skin displacement is inhibited during daily activities causing discomfort

Engineering Contradiction:

Improveattachment comfortVSAvoidskin movement accommodation

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The mounting substrate is divided into a rigid substrate portion and a flexible adhesive tape portion. The rigid substrate provides structural support while the flexible adhesive tape allows skin movement, resolving the contradiction between maintaining device shape and accommodating skin displacement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the device have different flexibility characteristics. The adhesive tape portion is made flexible to accommodate skin movement, while the substrate portion maintains rigidity for structural support. This local differentiation resolves the contradiction between overall flexibility and localized rigidity requirements.

Inventive Principle:

Principle #3Local quality

2Shape

If the mounting substrate is flexible to conform to skin shape, then the device fits the body contour, but the substrate bends and restricts skin movement during activities

Engineering Contradiction:

Improveconformity to body shapeVSAvoidskin movement restriction

Core Design Contradiction:

ShapeVSObject-generated harmful factors

Solution Approach 1:

The device is segmented into a rigid substrate that maintains shape and a flexible adhesive tape that conforms to skin contours while allowing movement. This segmentation resolves the contradiction between maintaining device shape and allowing skin movement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adhesive tape is designed to be dynamically flexible, allowing it to conform to skin shape initially and then move with the skin during activities. This dynamic flexibility resolves the contradiction between shape conformity and movement freedom.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the adhesive tape is stretchable to accommodate body movements, then comfort during movement is improved, but the mounting stability may be compromised

Engineering Contradiction:

Improvemovement accommodationVSAvoidattachment stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The device separates the stability function (rigid substrate) from the movement accommodation function (stretchable adhesive tape). The substrate provides mounting stability while the tape provides movement accommodation, resolving the contradiction between these two requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adhesive tape has localized stretchability to accommodate movements while maintaining overall attachment stability through its adhesive properties. This local quality differentiation resolves the contradiction between movement freedom and attachment stability.

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

The system provides improved comfort by allowing the adhesive tape and cover to stretch, minimizing discomfort during body movements, and ensuring the device remains securely attached while accommodating skin and muscle movements.

Implementation Method 1

an adhesive tape 8, a mounting substrate 13, and a cover 19 which are stretchable in a direction along a surface of the skin 5 and in a direction intersecting the surface of the skin 5

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP3847964B1Biological information measurement device

Publication Date: 2023.09.27 PHC HLDG CORP

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AI summary

The biological information measurement device (6) comprises: an adhesive tape (8) having on its bottom side an adhesive surface to be affixed to the skin of a user; a mounting substrate (13) disposed on the top side of the adhesive tape (8); a guide needle insertion cylinder (18) provided on the top side of the adhesive tape (8), on which the mounting substrate (13) is held; a sensor (17) electrically connected to the mounting substrate (13) for measuring biological information; and a cover (19) covering the top side of the mounting substrate (13). The bottom side of the mounting substrate (13) is in a state of not being affixed to the top side of the adhesive tape (8), and the adhesive tape (8) and the cover (19) are more stretchable than the mounting substrate (13).