Inflatable Tensioning Structure With Strands for Lower Packed Volume
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Solution Overview
Problem
Conventional inflatable products face challenges in maintaining shape and weight reduction due to the use of thick PVC tension bands, which increase the weight and folded volume of the deflated structure.
Innovation Solution
A tensioning structure formed by connecting plastic strips with spaced-apart strands, such as strings or wires, providing high tensile strength while minimizing material thickness and weight, and allowing for various geometric arrangements within the inflatable cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick PVC tension bands are used to maintain shape and provide tensile strength, then structural integrity is improved, but weight and folded volume increase
Solution Approach 1:
The tension band is segmented into multiple thin plastic strips spaced apart from each other, connected by strands. This segmentation allows the structure to maintain tensile strength while reducing overall material thickness and weight compared to a single thick PVC band.
Solution Approach 2:
The tension band uses a composite structure combining plastic strips with strand connections. This composite approach provides the necessary tensile strength through the strands while the thin plastic strips provide structural stability, achieving strength requirements without the weight of solid thick PVC.
2Strength
If thick PVC tension bands are used to maintain shape and provide tensile strength, then structural integrity is improved, but folded volume increases
Solution Approach 1:
By dividing the tension band into spaced-apart plastic strips rather than using a continuous thick band, the structure achieves comparable tensile strength with significantly reduced material volume, allowing for more compact folding and storage.
Solution Approach 2:
The invention uses thin plastic strips instead of thick PVC bands, allowing the tension structure to maintain strength while being much thinner and more flexible when deflated, thereby reducing the folded volume of the inflatable product.
3Manufacturing precision
If the number and spacing of tension bands are increased to achieve sharper rectangularity, then shape precision is improved, but weight and complexity increase
Solution Approach 1:
The segmented strip structure allows for easier addition of multiple tension bands at closely spaced intervals without proportionally increasing weight, as each individual strip-bundle is lightweight. This enables higher density arrangements for improved rectangularity.
Solution Approach 2:
The composite strip-strand construction provides high strength-to-weight ratio, allowing multiple tension bands to be installed throughout the inflatable structure to achieve sharp rectangular corners and precise geometric control without excessive weight accumulation.
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 achieves a lightweight, compact deflated state and maintains structural integrity during inflation, with improved tensile strength and reduced material thickness, resulting in a higher operable area-to-weight ratio and lower packed volume.
Implementation Method 1
When pulled taut, the strands provide a high tensile strength between the two opposed plastic strips
Implementation Method 2
the plastic strips facilitate a strong, long-lasting weld between the tensioning structure and the inflatable product
Data Source
AI summary
An internal tensioning structure for use in an inflatable product fulfills the basic function of maintaining two adjacent inflatable surfaces in a desired geometric arrangement when the inflatable product is pressurized. The tensioning structure is formed by connecting a pair of plastic strips sheets via spaced-apart strands, such as strings or wires. When pulled taut, the strands provide a high tensile strength between the two opposed plastic strips. At the same time, the plastic strips facilitate a strong, long-lasting weld between the tensioning structure and the inflatable product.