Blood Pressure Cuff Welded Hook-and-Loop Fastener

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Solution Overview

Problem

Existing blood pressure cuffs with hook-and-loop fasteners fixed by sewing are prone to peeling off due to turning-up issues, affecting durability and usability, especially when wound around an arm.

Innovation Solution

A cuff design where the hook-and-loop fasteners are welded from the inner side of the skin members, preventing exposure and peeling, improving durability and manufacturing efficiency while maintaining appearance quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the hook-and-loop fastener is fixed by sewing to the skin member, then the manufacturing process is simple, but the fastener may turn up and peel off, reducing durability

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoidfastener durability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces the mechanical sewing fixation method with a welding method to fix the hook-and-loop fastener to the skin member. The welding process melts and fuses the fastener to the fabric, creating a stronger bond that prevents turning up and peeling off, thereby improving durability while maintaining manufacturing efficiency

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fixation parameter from mechanical (sewing) to thermal (welding). By applying heat and pressure during the welding process, the fastener material is melted and fused to the skin member, creating a permanent bond that resists mechanical stress and prevents the turning-up issue

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the hook-and-loop fastener is sewn on the outer surface of the skin member, then the fastening function is achieved, but the sewn portion and fastener end edges are visible, affecting appearance quality

Engineering Contradiction:

Improvefastening functionVSAvoidappearance quality

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

The patent inverts the conventional approach by welding the hook-and-loop fastener from the inner side of the skin member rather than attaching it to the outer surface. This inversion allows the fastener to be hidden within the cuff structure, with only the necessary fastening surface exposed, thereby improving appearance quality while maintaining fastening functionality

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent moves the fastener attachment from a two-dimensional surface attachment (sewing on outer surface) to a three-dimensional integration by welding from the inner side. This allows the fastener to be embedded within the cuff structure, hiding the attachment edges and sewn portions from view while preserving the fastening surface

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If the hook-and-loop fastener is repeatedly engaged and detached, then the fastening function is utilized, but the fastener may turn up and peel off, reducing usability

Engineering Contradiction:

Improvefastening versatilityVSAvoidfastener stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent replaces the mechanical sewing connection with a welding connection that creates a fused bond between the fastener and skin member. This welding bond is resistant to repeated mechanical stress from engagement and detachment cycles, preventing the fastener from turning up or peeling off, thereby maintaining both versatility and stability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 welded fasteners enhance durability and usability by preventing peeling and exposure, reducing manufacturing costs, and improving the cuff's appearance and functionality.

Implementation Method 1

a first hook-and-loop fastener welded to the first skin member in a state where the first opening portion is closed from an inner side of the band

Methodology Applied

Scientific EffectWelding: Welding

Data Source

PatentUS20230157558A1Cuff for measuring blood pressure

Publication Date: 2023.05.25 OMRON HEALTHCARE CO LTD

AI summary

To provide a cuff for measuring blood pressure which is excellent in durability and convenient to use. A cuff for measuring blood pressure includes a band enveloping an air bag between an outer cloth and an inner cloth facing the outer cloth; a first opening portion provided in the outer cloth; and a first hook-and-loop fastener welded to the outer cloth in a state where the first opening portion is closed from an inner side of the band and a raised surface is exposed through the first opening portion.