Double-Layer Airbag Door Hinge for High-Elongation Deployment
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Solution Overview
Problem
Existing fabric-based airbag door hinges in vehicles have low elongation and insufficient tensile strength, leading to potential breakage during airbag deployment, posing a safety hazard due to detachment of the airbag door.
Innovation Solution
A double-layer textile structure for the airbag door hinge, comprising a first and second textile layer connected by connecting elements, with specific weft and warp spacings and densities, providing high elongation and tensile strength to prevent detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single-layer fabric structure is used for the airbag door hinge, then the device complexity is low and manufacturing is simple, but the tensile strength and elongation are insufficient leading to potential breakage during deployment
Solution Approach 1:
The patent applies composite materials by combining two different textile layers (first textile layer and second textile layer) with distinct properties into a single hinge structure. The first layer provides base strength while the second layer enhances elongation and tensile strength, creating a composite structure that prevents breakage during airbag deployment while maintaining reasonable complexity through integrated design.
Solution Approach 2:
The hinge is segmented into two functional textile layers connected by connecting elements. This segmentation allows each layer to specialize in different mechanical properties (one for strength, one for elongation), resolving the contradiction by distributing functions across layers rather than requiring a single complex material.
2Stability of the object's composition
If a single-layer fabric structure is used for the airbag door hinge, then the manufacturing process is simple, but the elongation properties are insufficient causing the hinge to break under excessive shear stress
Solution Approach 1:
By using composite textile layers, the patent achieves superior elongation properties through the second textile layer while the standardized connection method (connecting elements attached to both layers) keeps manufacturing feasible through established textile and molding processes.
Solution Approach 2:
The textile layers function as flexible structures that can elongate under stress. The knitted or woven textile construction inherently provides flexibility and elongation capacity, allowing the hinge to stretch during deployment without breaking, while remaining manufacturable through conventional textile production methods.
3Reliability
If the airbag door hinge uses insufficient tensile strength material, then the manufacturing cost is low, but the airbag door may detach from the load bearing component during deployment posing safety hazards
Solution Approach 1:
The composite textile structure provides enhanced reliability and safety by combining layers with different strength characteristics, ensuring the hinge can withstand deployment forces. The dual-layer design with connecting elements creates a redundant structure that prevents detachment while maintaining manageable complexity through systematic construction.
Solution Approach 2:
The connecting elements (threads, loops, or combinations) act as predetermined reinforcement features that cushion and distribute stress before failure can occur. These elements are built into the structure in advance to prevent detachment under extreme conditions, providing safety margins without requiring overly complex designs.
Data Source
Figure 1A~1B
Figure 2A~2D
Figure 2E~2G
AI summary
The present disclosure relates to an airbag door hinge used to connect an airbag door and a load bearing component surrounding the airbag door, characterized in that the airbag door hinge is a double-layer structure and has a first textile layer 1 and a second textile layer 2, and the first textile layer 1 and the second textile layer 2 are connected by a plurality of connecting portions 3. The present disclosure also relates to a trim component for vehicle interior, including the airbag door, the load bearing component surrounding the airbag door, and the airbag door hinge. The present disclosure also relates to a method for manufacturing the trim component.