Inflatable Ankle Restraint Platform for Vehicle Impact
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Solution Overview
Problem
During frontal impact testing, vehicle occupants experience ankle injuries due to the rolling or twisting motion of their feet on the pedals, which existing restraint systems fail to adequately address.
Innovation Solution
A deployable restraint system comprising an inflatable device and a stiffer platform that couples to the vehicle floor, deploying to support the ankle by preventing foot rolling and twisting, utilizing a thermoplastic elastomer material and a pyrotechnic inflator for inflation upon impact detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid platform is used to support the foot, then the stability and anti-rolling capability are improved, but the comfort and adaptability to foot position are worsened
Solution Approach 1:
The support system is divided into two distinct segments: an inflatable device that provides initial compliance and conformability to the foot, and a rigid platform that provides structural stability and anti-rolling support. This segmentation allows each component to optimize its function without compromising the other.
Solution Approach 2:
The system combines two fundamentally different material properties - the flexible, compliant material of the inflatable device and the rigid, stiff material of the platform - to create a composite support structure that exhibits both comfort and stability characteristics simultaneously.
2Adaptability or versatility
If an inflatable device is used alone, then the comfort and conformability are improved, but the stability and anti-rolling capability are worsened
Solution Approach 1:
The support system is divided into two distinct segments: an inflatable device that provides initial compliance and conformability to the foot, and a rigid platform that provides structural stability and anti-rolling support. This segmentation allows each component to optimize its function without compromising the other.
Solution Approach 2:
The system combines two fundamentally different material properties - the flexible, compliant material of the inflatable device and the rigid, stiff material of the platform - to create a composite support structure that exhibits both comfort and stability characteristics simultaneously.
3Reliability
If a complex restraint system is implemented, then the injury prevention capability is improved, but the device complexity and manufacturing cost are worsened
Solution Approach 1:
The patent merges two functional components - the inflatable device and the rigid platform - into a single integrated restraint system that works together to prevent injuries. This combination achieves enhanced protection without requiring multiple separate systems.
Solution Approach 2:
The restraint system is designed to perform multiple functions: the inflatable device provides cushioning and positioning, while the rigid platform provides structural support and rolling prevention. This multi-functionality reduces the need for additional separate components.
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 system effectively reduces ankle injuries by stabilizing the foot during impacts, preventing rolling and twisting motions, thereby enhancing occupant safety.
Implementation Method 1
utilizing a thermoplastic elastomer material and a pyrotechnic inflator for inflation upon impact detection
Data Source
AI summary
A restraint system for a vehicle includes a floor, a platform, and a deployable device. A hinge couples the platform to the floor. The deployable device is inflatable from an uninflated position to an inflated position. A material forming the platform is stiffer than a material forming the deployable device.