Airbag Package Compressed Region Void Elimination
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Solution Overview
Problem
Existing airbag packages for head protection face challenges in reducing the cross-sectional dimensions to fit within limited vehicle spaces, particularly in the front pillar area, while maintaining effective deployment and storage efficiency.
Innovation Solution
The airbag package is designed with a compressed region that includes a rolled portion with a void space eliminated by bending side layered portions to constrict the cross-sectional dimensions, and an initially inflatable region to facilitate smooth deployment, along with a concertina portion for efficient unfolding and a covering member to maintain the airbag's configuration during storage and mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the airbag is compressed to reduce cross-sectional dimensions for storage in limited vehicle spaces, then the storage space requirement is reduced, but the deployment smoothness and effectiveness may be compromised
Solution Approach 1:
The airbag is divided into multiple layered portions (upper, lower, and side layered portions) that can be independently compressed and arranged. This segmentation allows the void space to be eliminated through coordinated compression of different segments, reducing cross-sectional dimensions while maintaining the structural integrity needed for smooth deployment
Solution Approach 2:
The airbag is pre-compressed into a compact package with eliminated void spaces before installation. The side layered portions are pre-positioned to butt against each other, creating a dense packed structure that reduces storage volume while the preliminary arrangement ensures proper deployment sequence when activated
2Volume of moving object
If a predetermined salient jig is thrust against the rolled portion to form a compressed region, then the compression is achieved, but a void space remains in the airbag package
Solution Approach 1:
The compression structure employs asymmetric arrangement where side layered portions are positioned to bend and butt against each other at the center, creating an asymmetric compression pattern that effectively eliminates the central void space that symmetric compression methods leave behind
Solution Approach 2:
The side layered portions are compressed not only in the vertical direction but also bent inward from the horizontal dimensions, bringing them to butt against each other at the center. This multi-dimensional compression approach eliminates void spaces that single-direction compression cannot remove
3Quantity of substance
If the pressed airbag is spread out to eliminate void space, then the void space is reduced, but the dimension of the airbag package increases
Solution Approach 1:
The side layered portions are nested within the compressed structure, bending inward and packing tightly against each other and the upper/lower layered portions. This nesting arrangement eliminates void spaces without requiring the airbag to spread out, maintaining compact package dimensions
Data Source
AI summary
An airbag package of an airbag for head protection includes a rolled portion formed by rolling a skin material of the airbag as laid flat, and a compressed region in which a void space formed at the center of the cross-sectional surface of the rolled portion has been crushed due to compression. The rolled portion includes, in the cross-sectional surface, an upper layered portion, a lower layered portion, and a pair of side layered portions that are disposed around the center of the cross-sectional surface of the rolled portion and each have layers of the skin material. In the compressed region, each of the side layered portions bends generally at the center in an up and down direction such that the bent regions butt against each other and are packed between the upper layered portion and the lower layered portion in such a manner as to fill the void space.