Curtain Bag Dot-Like Inner Joint Parts for Rapid Inflation
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Solution Overview
Problem
Conventional curtain bags face challenges in rapid inflation during lateral collisions due to slow gas distribution, excessive stress on joint parts, and difficulty in maintaining internal pressure, leading to potential bag burst and inadequate protection, especially in roll-over scenarios, with issues of weight, bulkiness, and high costs.
Innovation Solution
A curtain bag design featuring dot-like inner joint parts independent of the outer peripheral joint part, densely arranged in regions contacting the pillar portion, allowing for quicker gas distribution and stable inflation, reducing stress concentration, and using a woven fabric with optimized yarn fineness and density to enhance gas-tightness and reduce weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional curtain bags use a small number of large inflating portions formed from linear, curvilinear, or U-shaped inner joint parts, then the bag structure is simpler to manufacture, but gas distribution is slow and inflation time is excessive
Solution Approach 1:
The patent divides the inflating portion into multiple small dot-like inner joint parts instead of using a small number of large inflating portions. This segmentation allows gas to distribute more quickly and uniformly across the bag, significantly improving inflation speed while maintaining manufacturing feasibility through standardized dot-like joint configurations.
Solution Approach 2:
The patent implements different inner joint part densities in different regions of the bag. Dot-like inner joint parts are arranged more densely in regions that contact pillar portions and less densely in other regions. This local quality variation optimizes gas distribution efficiency and inflation performance while adapting to the specific collision protection needs of different bag regions.
2Reliability
If conventional curtain bags use continuous inner joint parts connected to outer peripheral joint parts, then manufacturing is easier, but stress concentration occurs during inflation causing potential bag burst
Solution Approach 1:
The patent segments the inner joint parts into multiple independent dot-like units that are not continuous with each other or with the outer peripheral joint parts. This segmentation prevents stress concentration that would occur in continuous joint structures, allowing the bag to withstand inflation pressures without bursting while maintaining structural integrity.
Solution Approach 2:
The patent creates different structural qualities in different regions by using densely arranged dot-like inner joint parts in pillar-contact regions. This local reinforcement strategy enhances reliability in high-stress areas without requiring continuous joint structures throughout the entire bag, balancing manufacturing ease with burst resistance.
3Productivity
If conventional curtain bags use densely arranged inner joint parts in all regions, then gas distribution is improved, but weight and bulkiness increase
Solution Approach 1:
The patent applies different inner joint part densities to different regions of the bag. Dot-like inner joint parts are densely arranged only in regions that contact pillar portions during collision, while other regions have fewer inner joint parts. This local quality approach optimizes gas distribution efficiency where needed while minimizing weight and bulkiness in non-critical regions.
4Productivity
If conventional curtain bags use independent dot-like inner joint parts densely arranged in pillar-contact regions, then inflation speed and pressure stability are improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses multiple small dot-like inner joint parts instead of large continuous joints, which segments the gas distribution pathways and improves inflation speed. While this increases the number of joint parts, the standardized dot-like configuration makes them easier to manufacture individually, partially offsetting the increased arrangement complexity.
Solution Approach 2:
The patent concentrates dot-like inner joint parts densely only in pillar-contact regions where they are most needed for rapid inflation and pressure stability. This localized approach improves performance in critical areas while limiting the overall increase in manufacturing complexity to specific high-value regions rather than the entire bag structure.
Data Source
AI summary
Provided is a curtain bag which can be brought into an inflated state as required in a short time without locally applying an excessive load to its outer peripheral joint part (1) and inner joint parts (2). The dot-like inner joint parts (2) on the inside of the outer peripheral joint part (1) are isolated from the outer peripheral joint part (1) and also made to be independent of each other.