Airbag Wrapping Material Double Structure Rainwater Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing airbag devices mounted on the outer side of a vehicle interior face challenges in rapidly deploying the airbag while preventing rainwater from entering the folding completion body, as the wrapping material's slits allow rainwater to be introduced during deployment and inflation.
Innovation Solution
The airbag device features a wrapping material with a double structure, where the outer part has intermittently formed slits along the axial direction for rapid deployment and the inner part covers the slits, ensuring rainwater is suppressed from entering the folding completion body by directing it to be discharged externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the wrapping material has slits for rapid deployment, then the airbag can deploy quickly, but rainwater can be introduced into the folding completion body
Solution Approach 1:
The wrapping material is divided into multiple layers: an outer layer with slits for rapid deployment and an inner layer without slits that prevents rainwater from entering the folding completion body. This segmentation allows each layer to perform its specific function independently.
Solution Approach 2:
The inner wrapping material acts as an intermediary barrier between the outer wrapping material (with slits) and the folding completion body. It mediates by blocking rainwater that penetrates through the outer layer's slits while not interfering with the deployment function.
2Reliability
If the wrapping material is wrapped tightly around the folding completion body, then the airbag is protected, but rainwater can still enter through the slits
Solution Approach 1:
The protective wrapping material is segmented into functional zones: the outer layer provides structural protection and enables rapid deployment through slits, while the inner layer provides water protection. This segmentation allows simultaneous achievement of protection reliability and rainwater prevention.
Solution Approach 2:
Different parts of the wrapping material have different properties: the outer layer has slits for deployment speed, while the inner layer is continuous for water protection. This local quality differentiation resolves the contradiction between protection and rainwater prevention.
3Object-affected harmful factors
If the terminal of the inner part is positioned above the central line, then rainwater coverage is improved, but the airbag deployment is hindered
Solution Approach 1:
The terminal of the inner wrapping material is intentionally positioned asymmetrically below the central line rather than symmetrically above it. This asymmetric positioning allows rainwater to flow downward along the inner layer without interfering with the airbag deployment path, resolving the contradiction between rainwater suppression and deployment speed.
Solution Approach 2:
The terminal positioning problem is solved by considering the vertical dimension (below central line) rather than only horizontal coverage. This dimensional change allows rainwater to be directed downward while maintaining clear deployment path above.
Data Source
AI summary
An airbag device includes an airbag accommodated in the accommodation part in a state where a wrapping material is wrapped around a folding completion body formed by folding the air bag. A region of the wrapping material configured to cover an upper of the folding completion body has a double structure of an outer part and an inner part. The outer part has slits that are intermittently formed substantially along an axial direction of the folding completion body. The inner part is configured to cover a lower of the slits and is configured so that a terminal, which is an edge side distant from a region configuring the outer part of the wrapping material, is located below a central line extending substantially in a horizontal direction from a sectional center of the folding completion body.