Side Airbag Inflator Insertion via Symmetric Sewing and Stud Holes
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Solution Overview
Problem
The manufacturing process for side airbags is complex and costly due to the need for multiple sewing steps to prevent gas leakage and secure the inflator, which increases production time and size of the airbag.
Innovation Solution
A side airbag apparatus with a cushion sheet, pocket sheet, and partition sheets that are symmetrically designed to reduce sewing processes by forming insertion slots and stud holes for the inflator, allowing it to be inserted without additional sewing, and a sealing mechanism to prevent gas leakage, while a vent hole reduces internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sewing processes are used to secure the inflator and prevent gas leakage, then reliability of gas sealing is improved, but manufacturing complexity and production time increase
Solution Approach 1:
The patent combines the inflator securing function and gas sealing function into a single integrated sewing operation. The sewing part simultaneously performs both tasks, eliminating the need for separate sewing processes and reducing manufacturing complexity while maintaining reliability
Solution Approach 2:
The sewing part is designed to perform multiple functions: it secures the inflator in place and simultaneously seals the gas chamber. This multi-functional component reduces the number of manufacturing steps while ensuring both reliability aspects are addressed
2Reliability
If additional sewing processes are performed after inflator insertion, then gas leakage prevention is improved, but manufacturing time increases
Solution Approach 1:
The sewing part is designed and positioned before the final assembly step, allowing the inflator to be inserted and secured in a single operation. This preliminary configuration eliminates the need for subsequent sewing processes, improving productivity while maintaining gas leakage prevention
3Ease of manufacture
If the side airbag size is increased to accommodate the inflator insertion portion, then inflator installation is facilitated, but manufacturing cost increases
Solution Approach 1:
The airbag structure is designed with localized features only where needed for inflator installation. The insertion portion has specific local characteristics that facilitate inflator placement, while the rest of the airbag maintains its original compact size, avoiding unnecessary weight increase
Data Source
AI summary
A side airbag apparatus including a cushion sheet part having a first insertion slot part and first stud hole parts; a pocket sheet part having a second insertion slot part and second stud hole parts to correspond to the first insertion slot part and the first stud hole parts, respectively, and superposed on the cushion sheet part; partition sheet parts superposed on the cushion sheet part so as to be connected to both sides of the pocket sheet part; first sewing parts that connect the partition sheet parts and the pocket sheet part to the cushion sheet part; a second sewing part that connects superposed ends of the pocket sheet part and partition sheet parts that are folded in half; and a third sewing part that connects superposed circumferential portions of the cushion sheet part after the cushion sheet part is folded on the basis of a center portion thereof.