Vehicle Trim Panel Segmentation for Airbag Release
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Solution Overview
Problem
The existing vehicle interior trim panels with assist grip handles often obstruct airbag deployment due to a gap condition between the trim panel and the assist grip handle, which requires an interface that allows easy release of the trim panel from the metal structural element during airbag deployment without interfering with the assist grip handle's functionality.
Innovation Solution
A vehicle interior trim panel comprising a rigid trim portion with an assist grip opening and a flexible trim portion attached along the edge of the opening, which covers the assist grip opening to eliminate gaps and facilitate the trim panel's release from the metal structural element upon airbag deployment, using a combination of thermoplastic polymer and elastomer materials with integrated molding and snap-fit mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the trim panel is securely mounted to the metal structural element with fasteners extending through apertures, then the mounting strength is improved, but the ease of release upon airbag deployment deteriorates
Solution Approach 1:
The trim panel is divided into a rigid trim portion and a flexible trim portion that are separable from each other. The rigid trim portion remains mounted to the pillar while the flexible trim portion can be released and moved away, allowing the trim panel to be segmented into fixed and movable components that serve different functions during airbag deployment
Solution Approach 2:
The flexible trim portion is designed to be dynamically movable relative to the rigid trim portion and the pillar. It can be securely mounted during normal operation but easily released and moved away when airbag deployment occurs, transitioning from a static mounted state to a dynamic deployed state
2Reliability
If the flexible trim portion completely covers the assist grip opening, then the gap condition is eliminated, but the assist grip handle functionality deteriorates
Solution Approach 1:
The flexible trim portion has non-uniform coverage of the assist grip opening - it covers the gap areas to eliminate rattling and visual defects while leaving sufficient opening areas to maintain assist grip handle functionality. Different regions of the flexible trim portion have different degrees of coverage based on local requirements
Solution Approach 2:
The flexible trim portion provides partial coverage of the assist grip opening rather than complete coverage. This partial action is sufficient to eliminate the harmful gap condition and improve appearance while maintaining enough opening to preserve the assist grip handle's functional performance
3Ease of operation
If the trim panel is designed to easily release from the pillar, then the ease of release is improved, but the mounting strength deteriorates
Solution Approach 1:
The trim panel is divided into a rigid trim portion and a flexible trim portion that are separable from each other. The rigid trim portion remains mounted to the pillar while the flexible trim portion can be released and moved away, allowing the trim panel to be segmented into fixed and movable components that serve different functions during airbag deployment
Solution Approach 2:
The flexible trim portion acts as an intermediary between the rigid trim portion and the pillar. It provides the mounting connection during normal operation but can be easily released when needed, serving as a mediator that enables both strong mounting and easy release functions
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
Ensures the trim panel can move away from the pillar by a predetermined distance to allow full airbag deployment while maintaining the assist grip handle's functionality and minimizing sound and assembly issues due to part variations and vibrations.
Implementation Method 1
the flexible trim portion is attached to the rigid trim portion along an edge of the assist grip opening with the flexible trim portion at least partially covering the assist grip opening
Data Source
AI summary
A vehicle interior trim panel is provided with a rigid trim portion and a flexible trim portion. The rigid trim portion includes an assist grip opening. The flexible trim portion is attached to the rigid trim portion along an edge of the assist grip opening with the flexible trim portion at least partially covering the assist grip opening of the rigid trim portion.