Side Airbag Partitioning Wall and Check Valve Integration
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Solution Overview
Problem
Conventional side airbag sewing processes are costly and inefficient, with long sewn lengths and separate components increasing production time and material usage, while also resulting in a heavier and larger airbag package.
Innovation Solution
A side airbag design featuring a high pressure chamber and a low pressure chamber formed by separate base cloths, with a partitioning wall and check valve integrated into the base cloth, allowing for reduced sewing costs and a smaller, lighter package by permitting gas flow from the low pressure to the high pressure chamber during inflation and restricting reverse flow, thus maintaining internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the high pressure chamber and low pressure chamber are formed by separate base cloths with a separate partitioning wall, then the structural integrity and pressure maintenance are improved, but the sewing costs and production time increase due to longer sewn lengths
Solution Approach 1:
The partitioning wall is integrated into the base cloth that forms the high pressure chamber, eliminating the need for a separate partitioning wall component. This merging reduces the number of sewing operations and shortens the total sewn length, thereby improving productivity while maintaining the structural integrity needed for pressure maintenance
2Reliability
If the check valve is provided as a separate component, then the pressure control function is improved, but the sewing costs and package size increase
Solution Approach 1:
The check valve is integrated into the partitioning wall structure, combining the pressure control function with the existing structural component. This eliminates the need for a separate check valve component, reducing sewing costs and simplifying the overall device structure while maintaining effective pressure control
3Productivity
If the sewn length is reduced by integrating components, then the productivity and cost are improved, but the structural strength may be compromised
Solution Approach 1:
The base cloth is designed with folded portions that create distinct functional regions (high pressure chamber, low pressure chamber, partitioning wall, check valve) within a single integrated structure. This segmentation allows the single base cloth to perform multiple functions that previously required separate components, maintaining structural integrity while reducing sewing operations
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 reduces sewing costs and improves productivity by integrating the partitioning wall and check valve into the base cloth, resulting in a smaller, lighter airbag package that effectively restraints passengers during collisions by maintaining high internal pressure in the high pressure chamber.
Implementation Method 1
a check valve that is provided at a partial region of the partitioning wall, and that is provided convexly toward the high pressure chamber side when the side airbag is not inflated, and that permits flowing of the gas for inflation from the low pressure chamber side to the high pressure chamber side, and restricts flowing of gas in a direction opposite thereto
Data Source
AI summary
A side airbag device has: a side airbag that inflates and expands at a time of a side collision, and that has a lower chamber (high pressure chamber), and an upper chamber (low pressure chamber), the high pressure chamber and the low pressure chamber being formed by base cloths (a lower base cloth, an upper base cloth) that are respectively separate bodies; an inflator; a partitioning wall that is formed by a portion of the lower base cloth, and that divides the lower chamber and the upper chamber; and a check valve that is provided at a partial region of the partitioning wall, and that is provided convexly toward the lower chamber side when the side airbag is not inflated, and that permits flowing of the gas for inflation from the upper chamber side to the lower chamber side, and restricts flowing of gas in a direction opposite thereto.