Fishbone Fastening Strap with Magnetic Layer for Curved Seat Cushions

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Solution Overview

Problem

Existing hook-and-loop fastening straps for seat cushions suffer from insufficient bonding force and limited applicability to curved surfaces, requiring additional processing and molds for curved grooves, which is not cost-effective.

Innovation Solution

A fastening strap assembly featuring a laterally stretchable/compressible substrate with a fishbone-shaped fastening member and protective layer, allowing sideway bending and curving, with a magnetic layer for secure attachment and perforations for easy removal, enabling strong bonding to both straight and curved surfaces without extra processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional hook-and-loop fastening strap with rigid substrate is used, then the substrate provides structural support and protects hooks, but the fastening strap cannot bend or curve sideway and requires additional cutting molds for curved fixing grooves

Engineering Contradiction:

Improveapplicability to curved fixing groovesVSAvoidnumber of cutting molds needed

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The substrate is made laterally stretchable and compressible, allowing the fastening strap to bend and curve sideway to match curved fixing grooves without requiring additional cutting molds. This flexibility enables the same substrate structure to adapt to both straight and curved applications.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The fastening strap assembly with laterally deformable substrate serves multiple functions: it provides structural support, protects hooks, and adapts to various groove geometries (both straight and curved) using the same component, eliminating the need for different cutting molds.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If foam material penetrates into the voids of the substrate material, then the fastening strap bonds to the seat cushion, but the bonding force is insufficient and unexpected separation may occur

Engineering Contradiction:

Improvebonding strength between fastening strap and seat cushionVSAvoidjoint force between fastening strap and seat cushion

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The fastening strap assembly combines multiple materials with complementary properties: a laterally stretchable substrate for bonding, a protective layer for hook protection, and a magnetic material layer for additional securing force. This composite structure enhances both bonding strength and reliability.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The magnetic material layer acts as an intermediary that provides additional securing force between the fastening strap assembly and the seat cushion, supplementing the foam penetration bonding and preventing unexpected separation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the fastening strap uses a rigid structure with protective sidewalls, then the hooks are protected from foam material, but the fastening strap cannot be applied to curved surfaces without extra processing

Engineering Contradiction:

Improveapplicability to various seat cushion geometriesVSAvoidmanufacturing process complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The protective layer is designed to be laterally stretchable and compressible, allowing it to conform to curved surfaces while still providing hook protection. This eliminates the need for rigid protective sidewalls and additional cutting molds for curved applications.

Inventive Principle:

Principle #30Flexible shells and thin films

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 provides a strong, flexible fastening system that can be applied to various seat cushion geometries without additional molds, ensuring robust bonding and increased industrial applicability.

Implementation Method 1

a magnetic layer disposed between the substrate and the fastening member

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS9015907B2Fastening strap assembly and foam article including same

Publication Date: 2015.04.28 TAIWAN PAIHO LTD

AI summary

One aspect of the present invention provides a fastening strap assembly for used in a foam article. The fastening strap assembly includes a substrate having two sidewalls each formed along one side thereof in a longitudinal direction and spaced apart from each other; a substantially fishbone-shaped fastening member disposed between the sidewalls and adhered to the substrate, the fastening member having an elongate central rib and a plurality of fastening parts laterally extending from either sides of the rib and longitudinally spaced apart from each other, each fastening part having a plurality of hooks formed on a upper surface thereof; and a magnetic layer disposed between the substrate and the fastening member. The fastening strap assembly of the present invention has a unique sideway bending/curving function. Another aspect of the present invention provides a foam article, such as a seat cushion, including the sideway-bendable fastening strap assembly.