Push-Pin Fastening Assembly for Doona Padding Stability

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Solution Overview

Problem

The internal padding of a doona tends to move within the sheath, reducing its effectiveness in providing warmth to the user.

Innovation Solution

A system of fastening means, including press studs, slits, buttons, loops, and ribbons, or triangular clips with flexible tabs, is implemented at the corners of the doona's sheath and padding to secure the padding in place, preventing movement and ensuring consistent warmth distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the internal padding is placed within the sheath without fastening means, then the doona is simple in structure and easy to manufacture, but the padding moves within the sheath reducing warmth effectiveness

Engineering Contradiction:

Improvewarmth effectivenessVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The fastening system is segmented into multiple independent corner units, each handling a specific corner of the doona. This segmentation allows the padding to be secured at discrete points without requiring a complex continuous fastening system across the entire surface, thus improving warmth effectiveness while maintaining structural simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fastening means (press studs, buttons, loops, ribbons, or triangular clips) are pre-installed at the corners of both the sheath and padding during manufacturing. This preliminary action ensures that when the doona is assembled and used, the padding is immediately secured without requiring additional steps or complex mechanisms during operation

Inventive Principle:

Principle #10Preliminary action

2Stability of the object's composition

If fastening means are added at the corners to secure the padding, then the padding stability is improved, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvepadding stabilityVSAvoidmanufacturing ease

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

Instead of applying fastening mechanisms uniformly across the entire doona surface, the invention applies fastening means specifically at the corner regions where padding movement most significantly impacts warmth effectiveness. This localized approach provides adequate stability while minimizing the complexity added to the manufacturing process

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The fastening means utilize simple, inexpensive components such as press studs, buttons, loops, ribbons, or triangular clips that are easy to manufacture and attach. These components are straightforward to sew or attach to the sheath and padding, requiring minimal specialized manufacturing equipment or processes

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS11234540B2Push-pin securing assembly for bedding

Publication Date: 2022.02.01 ZAVARGE PTY LTD

AI summary

A system for securing an internal padding element of a doona to conform with the extent of a sheath or cover of the doona; the system including providing fastening means at least proximate the respective four corners of the internal padding element and the sheath or cover of the doona; the fastening means comprising a first component and a second component arranged for releasable coupling one to the other; each first and second component provided with attachment means for securing respective components to the padding element and to the cover of the doona.