Seat Back Side Airbag Layout for Stable Inner-Bag Deployment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle seats with side airbag devices struggle to deploy airbags in a stable and efficient manner, particularly the second airbag, which is inflation-deployed on the inside surface of the side frame, leading to suboptimal occupant restraint during side impacts.
Innovation Solution
The conveyance seat incorporates a side support member that extends along the side frame, creating a gap for the second airbag to deploy through, and includes protective and guide members to stabilize the deployment, ensuring the airbag is deployed efficiently and quickly on the inside surface of the side frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the second airbag is inflation-deployed on the inside surface side of the side frame, then the occupant can be quickly restrained in the initial stage of airbag inflation deployment, but the airbag deployment stability is insufficient
Solution Approach 1:
A guide member is introduced as an intermediary component between the second airbag and the side frame. The guide member includes a guide groove that directs and stabilizes the deployment path of the second airbag, ensuring it inflates in the correct direction while maintaining deployment speed. The guide member acts as a mediator that resolves the conflict between rapid deployment and stable positioning.
Solution Approach 2:
The function of stabilizing the second airbag deployment is extracted from the side frame structure itself and implemented as a separate guide member. This allows the side frame to maintain its primary structural function while the guide member specifically addresses the deployment stability issue, enabling the second airbag to deploy quickly and stably without compromising the overall seat structure.
2Reliability
If the side airbag device includes both first airbag on outside surface and second airbag on inside surface, then the occupant restraint is improved, but the device complexity increases
Solution Approach 1:
The first airbag and second airbag are merged into a single side airbag device system that works together to provide comprehensive occupant restraint. The first airbag on the outside surface and the second airbag on the inside surface are coordinated through the guide member, creating a unified restraint system that improves reliability while managing complexity through integrated design.
Solution Approach 2:
The side airbag device is designed with multi-functionality, where the first airbag provides external restraint and the second airbag provides internal restraint, both contributing to overall occupant protection. The guide member serves multiple functions by guiding the second airbag deployment and ensuring proper positioning, thereby justifying the increased device complexity through enhanced safety performance.
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 stable deployment of airbags allows for quicker and more effective restraint of the seated occupant, preventing unintended contact with the side frame and ensuring efficient pressure transmission to the skin burst-open portion.
Implementation Method 1
an inflator supplying gas into the first airbag and the second airbag
Data Source
AI summary
Provided is a conveyance seat equipped with a side airbag device with which an airbag can be inflation-deployed in a more stable state. The conveyance seat includes a seat back and a side airbag device attached to a side portion of the seat back. The seat back includes a back frame having a side frame and a side support member attached to the front part of the side frame and protruding to the seat front side beyond the side frame. The side airbag device has a first airbag inflated on the outside surface side of the side frame and a second airbag inflated on the inside surface side of the side frame. The second airbag passes through a gap formed between the side frame and the side support member in the seat front to back direction and is inflated on the inside surface side of side frame.