Vehicle Seat Airbag Mounting Structure for Load Isolation
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Solution Overview
Problem
The load applied to the back side of a vehicle seatback can cause displacement of the airbag module, which is directly fastened to the back panel, leading to potential deformation during deployment.
Innovation Solution
A vehicle seat design with a seatback frame, a plate member, and an airbag module connected via a mounting member that includes a clearance between the airbag module and the extension, allowing the load to be prevented from being transmitted to the airbag module, and a fastening system that facilitates easy assembly and stable deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the airbag module is directly fastened to the back panel, then the assembly is simplified and manufacturing cost is reduced, but the load applied to the back side of the seatback causes displacement of the airbag module and potential deformation during deployment
Solution Approach 1:
A mounting member is introduced as an intermediary component between the airbag module and the back panel. This mounting member includes a clearance between the airbag module and the extension of the back panel, allowing it to absorb loads applied to the back side of the seatback and prevent direct transmission of these loads to the airbag module, thereby preventing displacement and deformation while maintaining assembly simplicity
2Device complexity
If the airbag module is directly fastened to the back panel, then the number of components is reduced, but the position of the airbag module may change under load
Solution Approach 1:
The mounting member serves as a mediator that provides a stable mounting structure for the airbag module. It includes a clearance that allows the airbag module to be securely positioned while isolating it from loads applied to the back panel, preventing position changes under load while adding only one additional component
3Reliability
If a clearance is defined between the airbag module and the extension, then load transmission is prevented and airbag module stability is improved, but the structural complexity increases
Solution Approach 1:
The mounting structure is segmented into distinct functional parts: the mounting member with clearance, the back panel with extension, and the airbag module. This segmentation allows each component to perform its specific function independently - the clearance absorbs load, the extension provides structural support, and the airbag module remains stable - while maintaining overall structural integrity without excessive complexity
Data Source
AI summary
A vehicle seat includes a seatback frame including a pair of side members extending vertically along either side thereof and providing a structural framework of a seatback, a plate member positioned behind the seatback frame and including an extension extending in an outboard direction from the side member located on an outboard side of the seatback frame, a mounting member connected to the outboard side member, and an airbag module positioned on a front side of the extension and connected to the outboard side member via the mounting member, a clearance being defined between the airbag module and the extension.