Vehicle Airbag Fixing Bracket Resonance and Fastening
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Solution Overview
Problem
The existing airbag apparatuses face difficulties in fastening the fixing bracket to the vehicle's side wall without compromising the rigidity of the fixing bracket, leading to potential resonance issues due to increased distance between the inflator support and fastening portions, and interference during the fastening operation.
Innovation Solution
The airbag apparatus incorporates a fixing bracket with a restraining wall that extends below the inflator, allowing for closer proximity of the fastening portion to the inflator, reducing the extending length of the fixing bracket and preventing downward displacement of the airbag body, thus maintaining rigidity and facilitating easy fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the fixing bracket is extended downward beyond the fastening point to allow fastening under the airbag body, then the fastening operation becomes easier, but the distance between the inflator support portion and fastening portion increases, decreasing the rigidity of the fixing bracket
Solution Approach 1:
The restraining wall extends in the vertical dimension to provide a new fastening approach. By extending the restraining wall downward, the fastening portion can be positioned below the airbag body without significantly increasing the horizontal distance between the inflator support and fastening portions, thus maintaining rigidity while enabling easier fastening operation.
2Ease of manufacture
If part of the airbag body is urged downward to fasten the fixing bracket, then the fixing bracket can be fastened to the vehicle body, but the fastening operation becomes troublesome due to potential engagement of the airbag body with fastener members or tools
Solution Approach 1:
The restraining wall is designed to preliminarily guide and position the airbag body before the fastening operation. By providing a predetermined path and space through the restraining wall structure, the airbag body is pre-positioned to avoid engagement with fastener members or tools during the fastening process, eliminating the need to urge the airbag body downward.
3Strength
If the fixing bracket is extended to reduce the distance between inflator support and fastening portions, then the rigidity is maintained, but the space occupation increases and may interfere with airbag deployment
Solution Approach 1:
The fixing bracket is segmented into functional portions: the inflator support portion, the restraining wall, and the fastening portion. This segmentation allows each portion to be optimized independently - the restraining wall provides the necessary structural connection to maintain rigidity, while the fastening portion is positioned to minimize space occupation and avoid interference with airbag deployment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the rigidity of the fixing bracket, prevents resonance, and simplifies the fastening operation by maintaining the distance between the inflator support and fastening portions, while allowing for reduced space occupation and easier deployment of the airbag.
Implementation Method 1
The inflator generates high pressure gas when an impact shock is input
Data Source
AI summary
An airbag apparatus includes a fixing bracket fixed to an upper portion of the side wall of a vehicle. The fixing bracket has an inflator support portion that supports an inflator, a fastening portion fastened and fixed to the upper portion of the side wall of the vehicle at a position below the inflator, and a restraining wall that extends along the axis direction of the fastening portion under the inflator. An airbag body is disposed between the inflator and an upper wall portion of the restraining wall, and the airbag body is compressed by the inflator and the upper wall portion and held between the inflator and the upper wall portion. The restraining wall restrains displacement of the airbag body so that the airbag body does not overlap a fastening operation area into which the fixing bracket is fastened.