Airbag Stepped Surface Prevents Retainer Jamming
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Solution Overview
Problem
Conventional completely folded airbag configurations risk jamming between the retainer and storage portion due to the airbag's circumferential edge being pressed onto the lower surface of the retainer, preventing proper inflation and securing of the airbag's shape.
Innovation Solution
Incorporating a stepped surface on the bottom wall separated portion of the airbag's folded body, with a vertical surface bent upward and a horizontal surface above the bottom wall cover portion, to create a gap that prevents jamming by offsetting the fixing units from the storage portion, ensuring the airbag inflates correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the airbag is folded to be gathered to the upper side of the retainer with the circumferential edge of the inflow opening disposed on the lower surface side of the bottom wall portion, then the airbag achieves a compact folded configuration, but the airbag may be jammed between the retainer and storage portion preventing proper inflation
Solution Approach 1:
The patent introduces a stepped surface structure with multiple height levels on the bottom wall portion of the retainer. This creates vertical dimensional variation that prevents the airbag's circumferential edge from being pressed flat against the lower surface, thereby eliminating the jamming risk while maintaining compact folding configuration.
Solution Approach 2:
The bottom wall portion is designed with different local qualities through the stepped surface, where certain areas have different heights. This local variation in surface elevation prevents uniform compression of the airbag edge, allowing the airbag to maintain its inflatable shape while achieving compact storage.
2Stability of the object's composition
If the circumferential edge of the inflow opening is pressed onto the lower surface of the bottom wall portion for compact folding, then the airbag achieves stable folded positioning, but the fixing units may jam the airbag between the retainer and storage portion
Solution Approach 1:
The stepped surface structure creates vertical dimensional variation on the bottom wall portion, preventing the airbag edge from being uniformly pressed flat. This maintains stable folded positioning while eliminating jamming risks during the attachment process.
Solution Approach 2:
The stepped surface acts as an intermediary structure between the airbag and the flat storage portion. It provides a graduated surface that guides the airbag into proper positioning without creating sharp edges that could cause jamming, thereby facilitating smooth attachment.
Data Source
AI summary
A completely folded body of an airbag includes: a folded body and a retainer, which is assembled to the folded body, including: an annular bottom wall portion; a plurality of fixing units; and a reinforcing rib, wherein: the folded body of the airbag is configured in such a folded shape that the airbag is folded to be gathered to an upper side of the retainer; the folded body is arranged with a bottom wall cover portion and a bottom wall separated portion which extends from the bottom wall cover portion; and the bottom wall separated portion includes a stepped surface having a vertical surface bent upward from the bottom wall cover portion, and a horizontal surface which is disposed above the bottom wall cover portion from an upper end of the vertical surface and extends toward an outer circumferential edge of the bottom wall separated portion.