Airbag Ventilation Opening Sealing with Integrated Safety-Loop
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Solution Overview
Problem
The existing airbag modules face issues with the tightness of ventilation openings cut into the airbag fabric, which are not always sufficient, and the placement of arrester straps and safety-loops requires complicated sewing procedures.
Innovation Solution
The safety-loop is integrated as a component of a reinforcing blank surrounding the ventilation opening, with the arrester strap end connected to both the airbag fabric and the reinforcing blank, forming a secure and uniform attachment that eliminates the need for additional components and simplifies the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate sewing procedures are used to place the arrester strap and safety-loop, then the components can be individually positioned, but the manufacturing process becomes complicated
Solution Approach 1:
The patent combines the safety-loop and arrester strap placement into a single integrated sewing procedure. The safety-loop is constructed as one continuous piece of fabric that is sewn in one operation, eliminating the need for separate sewing steps to attach the arrester strap and safety-loop individually. This integration directly reduces manufacturing complexity while maintaining proper component positioning.
2Ease of manufacture
If a simple slit is cut into the airbag fabric for ventilation, then the ventilation opening is easy to create, but the tightness and sealing of the opening cannot be sufficient
Solution Approach 1:
The safety-loop is pre-formed as an integrated fabric structure with the ventilation opening designed into it before the airbag is fully assembled. The slit is cut and the safety-loop is constructed in advance as part of the same fabric piece, ensuring that the ventilation opening maintains its tightness and sealing properties throughout the manufacturing and deployment process, rather than attempting to seal it afterward.
3Adaptability or versatility
If the arrester strap is detachably mounted on the airbag module, then the arrester strap can be released to open the ventilation opening, but the attachment security may be compromised
Solution Approach 1:
The safety-loop acts as an intermediary structure between the arrester strap and the airbag fabric. The arrester strap is securely attached to the safety-loop, which is itself integrally constructed from the airbag fabric. This intermediary safety-loop structure provides a secure attachment point that maintains strength while allowing for controlled release to open the ventilation opening when needed.
Data Source
AI summary
An airbag formed of an airbag fabric (10) having a slit-shaped adaptive ventilation opening (11) which in the folded-up state of the airbag is held in at least a partially closed state by an arrester strap (20) having an end overlapping the adaptive ventilation opening (11) and fastened to the airbag fabric (10). The arrester strap (20) is guided through a safety-loop opening (31). The safety-loop opening is formed by a reinforcing blank (13) enclosing the ventilation opening (11) and the opening (31) for the arrester strap (20) is formed by an edge area of the reinforcing blank (31) not connected to the airbag fabric (10), and in that the end of the arrester strap is connected with both the airbag fabric (10) and with the reinforcing blank (13) in an area lying opposite with respect the edge section of the ventilation opening (11) forming the opening (31).