Doona Corner Fastening to Keep Internal Padding in Place

Solution Overview

Problem

The internal padding in typical doona bed coverings tends to move within the sheath, reducing its effectiveness in providing warmth to the user.

Innovation Solution

A system is provided with fastening means at the corners of the internal padding and the sheath, including press studs, slits, buttons, loops, and ribbons, as well as triangular clips with flexible tabs, to secure the padding in place within the sheath.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

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

Engineering Contradiction:

Improvepadding position stabilityVSAvoidfastening system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The fastening system is divided 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 mechanism, resolving the contradiction between stability and simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fastening means are pre-positioned at the corners of both the sheath and padding before assembly. This preliminary positioning ensures that when the padding is inserted into the sheath, it is automatically secured at the correct positions, maintaining stability while keeping the overall system simple.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If fastening means are added at the corners of the sheath and padding, then the padding position stability is improved, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvepadding position stabilityVSAvoidmanufacturing process simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The fastening system is divided 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 mechanism, resolving the contradiction between stability and simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fastening means use simple, inexpensive components such as buttons, loops, or press studs that can be easily attached and detached. These simple fastening elements are cost-effective and straightforward to manufacture, reducing the complexity burden while maintaining reliability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Stability of the object's composition

If multiple fastening points are used to secure the padding, then the warmth distribution consistency is improved, but the device complexity increases

Engineering Contradiction:

Improvewarmth distribution consistencyVSAvoidfastening system complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The fastening system is divided 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 mechanism, resolving the contradiction between stability and simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Fastening means are concentrated at the corner regions where the padding is most likely to shift, providing localized stabilization. This local quality approach ensures warmth distribution consistency at critical areas without requiring complex fastening throughout the entire doona structure.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10827858B2Bedding

Publication Date: 2020.11.10 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.