Seat Back Panel Retainer for Airbag Deployment Stability
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Solution Overview
Problem
Existing seat assemblies in vehicles lack effective mechanisms to securely couple the outer panels with the substrate panels, especially during the deployment of side impact airbags, which can lead to movement and shear strain issues.
Innovation Solution
The seat assembly incorporates a retainer mechanism that is coupled to both the substrate panel and the outer panel, utilizing heat stakes and a threaded boss to securely fasten the outer panel to the substrate panel, thereby limiting movement and shear strain during airbag deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outer panel is coupled to the substrate panel using traditional fastening methods, then the seat assembly can be assembled, but movement and shear strain occur during airbag deployment
Solution Approach 1:
The retainer is divided into distinct functional segments: a base portion for mounting to the substrate panel, an arm portion extending from the base, and a boss received within a recess. This segmentation allows each portion to independently perform its specific function while working together to prevent panel movement during airbag deployment.
Solution Approach 2:
The boss of the retainer is received within a recess of the substrate panel, creating a nested configuration where one component fits into another. This nesting arrangement provides precise positioning and constraint of the outer panel relative to the substrate panel, eliminating movement degrees of freedom.
2Strength
If the outer panel is securely fastened to limit movement, then shear strain on weld tabs is reduced, but the device complexity increases
Solution Approach 1:
The retainer acts as an intermediary component between the outer panel and the substrate panel. Rather than directly fastening the panels together, the retainer mediates the connection by receiving the arm within its recess and securing the boss, thereby distributing and managing the mechanical stresses during airbag deployment.
3Ease of manufacture
If traditional coupling methods are used, then manufacturing is simpler, but the outer panel moves during airbag deployment causing safety issues
Solution Approach 1:
The retainer introduces specific geometric parameters and constraints: the arm extends at defined angles from the base, the boss fits within a specifically dimensioned recess, and the mounting aperture provides a fixed attachment point. These parameter changes transform the coupling system from a simple connection to a constrained mechanism that prevents harmful movement while remaining manufacturable.
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
The retainer mechanism effectively limits the movement of the outer panel relative to the substrate panel and reduces shear strain on the weld tabs during airbag deployment, enhancing the structural integrity and safety of the seat assembly.
Implementation Method 1
utilizing heat stakes and a threaded boss to securely fasten the outer panel to the substrate panel
Data Source
AI summary
A seat assembly, comprising a seat back comprising: a cushion; a back panel assembly, including: a substrate panel; an outer panel coupled to the substrate panel via a plurality of protrusions of at least one of the outer panel or the substrate panel; a retainer coupled to the substrate panel and the outer panel; a trim cover engaged with the back panel assembly and covering at least a portion of the cushion; and an airbag disposed at least partially between the outer panel and the trim cover; wherein the retainer is configured to limit movement of the outer panel during deployment of the airbag.