Airbag Retaining Strap Loop Connection Assembly
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Solution Overview
Problem
The existing methods for attaching airbag retaining straps to vehicle airbags are time-consuming and expensive, requiring complex sewing processes and pre-assembled metal tabs that can interfere with the sewing process.
Innovation Solution
A simplified airbag design where the retaining strap extends in a single layer, with only the first strap end connected to the airbag wall, and a loop connection is used to attach the fastening element to the second strap end, allowing for quick and easy assembly without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the retaining strap ends are sewn to the gas bag wall with a pre-assembled metal tab, then the airbag can be securely mounted to the vehicle, but the assembly process becomes very time-consuming and expensive
Solution Approach 1:
The fastening system is divided into separate components: the retaining strap is sewn to the airbag wall independently, and the metal tab is attached separately via a loop connection. This segmentation allows the sewing process to proceed without the metal tab interfering, while still achieving secure mounting when the components are combined.
Solution Approach 2:
The retaining strap is pre-sewn to the airbag wall before the metal tab is attached. This preliminary action eliminates the need to handle and position the metal tab during the sewing process, significantly reducing assembly time and complexity while maintaining mounting security.
2Ease of manufacture
If the pre-assembled metal tab is attached to the retaining strap before sewing, then the fastening element is ready for mounting, but the metal tab gets caught on the sewing table and interferes with the sewing process
Solution Approach 1:
The metal tab is extracted from the assembly process during sewing. Instead of being pre-attached to the retaining strap, the metal tab is attached separately after the sewing is complete. This removes the source of interference from the sewing operation while still providing the necessary fastening functionality.
3Reliability
If the retaining strap is threaded through a strap opening and both ends are folded and sewn to the gas bag wall, then the fastening element is securely attached, but the amount of work required is undesirably high
Solution Approach 1:
The metal tab attachment is extracted from the sewing process. The retaining strap is sewn to the airbag wall without the metal tab, requiring only one attachment point instead of two. The metal tab is then attached separately via a simple loop connection, significantly reducing the overall assembly time while maintaining secure attachment.
Data Source
Figure 1~2
Figure 3a~3e
Figure 4~6
AI summary
The invention relates to an airbag (1) for a motor vehicle, comprising a securing element (29) for attaching the airbag (1) to the motor vehicle, an airbag wall (2) having opposing wall sections (19, 21), and an elongated flexible retaining strip (13) for positioning the airbag (1) in the unfolded state thereof, which extends from a first strip end (15) to an opposing second strip end (17), wherein the first strip end (15) is attached to the airbag wall (2) and wherein the securing element (29) is attached to the second strip end (17) by means of a loop connection. In addition, the invention relates to a method for producing an airbag (1) of this type.