Air Bag Module Horn Switch Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing air-bag modules for motor vehicles do not effectively integrate a mechanism to reduce the force required to activate the horn switch while ensuring secure attachment to the steering wheel and efficient energy absorption during crashes.
Innovation Solution
A driver air-bag module design featuring a housing with embedded wires forming a horn switch, a lightweight cover with hooks for secure attachment to the housing, and a shield that allows relative movement to activate the horn switch, while the air-bag absorbs kinetic energy during crashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the horn switch is integrated into the air-bag module with embedded wires in the housing, then the horn switch activation force is reduced, but the structural complexity of the housing increases
Solution Approach 1:
The horn switch wires are embedded directly into the housing structure, merging the electrical switch mechanism with the structural component. This integration eliminates separate mounting hardware and reduces the force needed to activate the horn switch while maintaining housing integrity.
Solution Approach 2:
The housing serves multiple functions: it provides structural support for the air-bag module, contains the horn switch wires, and acts as the activation mechanism itself. This multi-functionality reduces the need for additional components and simplifies the overall structure.
2Force
If the cover is made lightweight to allow movement for horn switch activation, then the horn switch becomes easier to activate, but the secure attachment to the housing becomes more difficult
Solution Approach 1:
The cover is designed with dynamic characteristics, allowing it to move relative to the housing for horn activation while maintaining secure attachment. The hooks provide a mechanism that permits controlled movement during normal operation but ensures firm attachment during deployment.
Solution Approach 2:
The hooks serve as an intermediary mechanism between the cover and housing, providing both secure attachment and controlled movement. They engage with the housing to hold the cover in place while allowing the necessary displacement for horn switch activation.
3Loss of energy
If the air-bag module is designed for efficient kinetic energy absorption during crashes, then the energy absorption capability is improved, but the device complexity increases
Solution Approach 1:
Multiple functions are merged into single components: the housing contains both structural and electrical functions, the cover provides both attachment and activation functions, and the air-bag itself serves as both the protective cushion and the energy absorption mechanism. This integration improves energy absorption efficiency while minimizing added complexity.
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 solution reduces the force needed to activate the horn switch and ensures secure attachment to the steering wheel, enhancing the air-bag's energy absorption capabilities during frontal crashes.
Implementation Method 1
The air-bag expands to absorb kinetic energy of a driver of the motor vehicle during, for example, a frontal crash event
Data Source
AI summary
An assembly includes a housing (12) and a cover (20) that define a cavity (15). An air bag (22) is positioned in the cavity (15), and the cover (20) has hooks (46) that engage with the housing (12) to secure the cover (20) to the housing (12). The air bag (22) expands to absorb kinetic energy of a driver. The hooks (46) are energized into engagement with the housing (12) directly or indirectly by the air bag (22) as it expands.