Airbag Assembly Hinge Protection Structure
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Solution Overview
Problem
Conventional airbag deployment systems face issues with hinge damage and incomplete deployment when high-explosion pressure airbags are used, as the existing single-material hinge structure is not adequately designed to handle the stress, leading to potential passenger injury and manufacturing cost inefficiencies.
Innovation Solution
The airbag assembly incorporates a hinge protection structure with multiple hinge center points, a rupture induction structure, and a support part with preset elongation, allowing the deployment part to turn and open effectively at various temperature conditions, distributing stress through load pass holes and ribs, and preventing hinge damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-material hinge structure is used, then the manufacturing process is simple, but the hinge cannot handle high explosion pressure and may be damaged
Solution Approach 1:
The hinge part is constructed using composite materials, specifically combining a resin base material with reinforcement ribs integrated into the structure. This composite construction provides both the necessary strength to withstand high explosion pressures and maintains manufacturing simplicity through integrated molding processes
2Device complexity
If the hinge part is designed for low explosion pressure airbags, then the structure is simpler, but it cannot be used for high explosion pressure airbags
Solution Approach 1:
The hinge part incorporates locally reinforced regions with ribs positioned at specific locations where stress concentrates during deployment. This localized reinforcement approach provides the necessary strength for high explosion pressure applications while keeping the overall structure relatively simple and maintaining adaptability across different airbag types
3Shape
If the deployment part is made thin for invisible deployment, then the appearance is improved, but the deployment line becomes a weak portion
Solution Approach 1:
The deployment line is pre-formed with controlled thickness during the injection molding process, creating a predetermined weak portion that facilitates clean separation during airbag deployment. This preliminary action ensures the deployment line maintains sufficient strength for normal use while enabling reliable deployment when needed
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 design enables reliable and cost-effective deployment of airbags, reducing the risk of hinge damage and enhancing passenger safety by facilitating smooth deployment across different temperature conditions.
Implementation Method 1
a support part with preset elongation, allowing the deployment part to turn and open effectively at various temperature conditions, distributing stress through load pass holes
Data Source
AI summary
An airbag assembly, which is capable of facilitating a deployment of a deployment part when a passenger seat airbag is deployed, and preventing a damage of a hinge part includes: a deployment part turned and opened when an airbag disposed inside a crash pad is deployed; a hinge part fixing the deployment part to the crash pad; and a plurality of hinge protection structures formed at one end of the hinge part in order to set a deployment direction of the airbag. Each of the plurality of hinge protection structures may include a load pass hole formed at the opposite surface of a surface facing the airbag, and distributes stress applied to the hinge part when the airbag is deployed.