Driver Seat Airbag Hook Restraint Clip Design
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Solution Overview
Problem
The hook of the horn plate in driver seat airbags is prone to deformation due to the deploying force, causing it to be released from the restraint wire, which is a significant issue in existing designs.
Innovation Solution
The implementation of restraint clips with torsion springs and anti-deformation ribs that securely hold the hook in place, preventing deformation by applying elastic forces and ensuring the hook remains restrained even under the deploying force of the airbag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hook is formed in the mounting plate and restrained by a wire, then the assembly is simple, but the hook is deformed by deploying force and released from restraint
Solution Approach 1:
The restraint clip is designed to be elastically deformable, allowing it to dynamically adapt to the hook during insertion and then maintain a constant restraining force to prevent deformation under deploying loads
Solution Approach 2:
The restraint structure is divided into separate components: the restraint clip with torsion spring, the holder, and the hook. This segmentation allows each component to perform its specific function independently, with the restraint clip providing elastic restraint and the holder providing structural support
2Ease of operation
If the restraint clip is elastically deformable, then the hook can be easily inserted and restrained, but the structure becomes more complex
Solution Approach 1:
The restraint clip uses a torsion spring to automatically return to its original position after the hook is inserted, providing self-service functionality that eliminates the need for additional actuators or complex control mechanisms
Solution Approach 2:
The restraint clip changes its physical state through elastic deformation, transitioning from a narrow inserted state to a widened restrained state, utilizing parameter changes to achieve the restraining function
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 effectively prevents the hook from being released during the deployment of the airbag, ensuring reliable operation and rapid assembly of the airbag components, while also allowing for easy disassembly.
Implementation Method 1
a torsion spring that is connected to the fastening wire, and is formed in a ring shape to be elastically deformable
Implementation Method 2
a torsion spring that is connected to the fastening wire, and is formed in a ring shape to be elastically deformable
Implementation Method 3
The restraint clip may be elastically deformed such that both ends thereof are narrowed when inserted into the holder and are widened after being inserted into the holder
Data Source
AI summary
A driver seat airbag including a horn plate seated on a steering wheel armature and provided with a plurality of restraint holes; holders disposed in the plurality of restraint holes; restraint clips installed in the plurality of holders to be elastically deformable; a mounting plate seated on the horn plate; and hooks provided to protrude from the mounting plate to correspond to the plurality of restraint holes, inserted into the plurality of restraint holes, and hooked on and restrained by the restraint clips.