Airbag Guide Wire Deployment for Occupant Protection
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Solution Overview
Problem
Conventional airbags are limited in protecting occupants whose seats change positions, as they primarily focus on torso protection and rely solely on airbag tension and external tethers, neglecting head protection and being ineffective when seats rotate or change configuration.
Innovation Solution
An airbag apparatus with a variable-length guide wire connected to a seat back and cushion, deploying an airbag cushion forward along the guide wire to cover the occupant, incorporating a headrest and seat design that extends above the passenger's head and a pair of guide wires to stabilize the airbag deployment, ensuring comprehensive protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional airbags are installed in fixed positions to protect occupants, then torso protection is provided, but they become ineffective when seats change positions or rotate
Solution Approach 1:
The airbag cushion is transformed from a static fixed-position device to a dynamic deployable structure. The cushion can be deployed forward along the guide wire to reach occupants regardless of seat position, and can be retracted when not needed, adapting to various seat configurations while maintaining protection effectiveness
Solution Approach 2:
A guide wire is introduced as an intermediary mechanism between the airbag cushion and the seat structure. The guide wire provides a constrained path for the cushion to deploy forward, enabling the cushion to reach occupants effectively while accommodating seat position changes and rotations
2Device complexity
If airbags are designed to protect only the torso, then the structure remains simple, but head protection is neglected
Solution Approach 1:
The airbag cushion design extends protection from the traditional horizontal torso-only coverage to a three-dimensional configuration that envelops the occupant's upper body including the head. The cushion can expand upward and forward to cover the head region, adding vertical and forward dimensions to the protection zone without significantly complicating the basic cushion structure
3Device complexity
If occupants are constrained only by airbag tension and external tethers, then the system remains simple, but structural constraining ability is degraded
Solution Approach 1:
The constraint system merges multiple functions into a unified structure: the guide wire serves both as a deployment path for the airbag cushion and as a constraint element that limits occupant movement. The seat back and cushion structures are integrated to provide both support and constraint functions, creating a coordinated system that enhances overall constraining ability without adding separate complex components
Data Source
AI summary
An airbag is installed in a seat, and since an airbag cushion is deployed from an upper side of the seat toward the front of a passenger to expand so as to cover the passenger, the upper body of the passenger is stably restrained. In addition, the airbag cushion is deployed while advancing forward so as not to be interfered with by the passenger by the guide wire, and the binding force of the airbag cushion is secured by the guide wire so that the protection performance for the passenger via the airbag cushion is improved.