Airbag Device Folded Part Orientation for Deployment
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Solution Overview
Problem
Existing airbag devices face challenges in smoothly deploying the airbag main body during inflation due to inefficient folding methods, which affect occupant restraint performance.
Innovation Solution
The airbag device features a first folded part with a gas introduction opening at its base end and multiple second folded parts connected to its distal end, with the connecting part between them facing the case body's door part, allowing for a more efficient deployment by shortening the distance from the inflator to the connection point and distributing the load across connected second folded parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the airbag main body is folded using conventional folding methods, then the airbag can be stored in the case body, but the deployment smoothness during inflation deteriorates
Solution Approach 1:
The airbag main body is divided into multiple folded parts (first folded part and multiple second folded parts) with specific connection relationships. This segmentation allows the airbag to be stored compactly while enabling smooth deployment during inflation, as each folded part can expand in a coordinated manner.
Solution Approach 2:
The airbag main body is pre-folded into a specific configuration before storage, with the first folded part and multiple second folded parts arranged in a predetermined pattern. This preliminary folding action ensures that during deployment, the airbag expands smoothly without requiring complex real-time adjustment mechanisms.
2Volume of stationary object
If the airbag main body is folded to fit the case body, then storage space is optimized, but the deployment speed deteriorates
Solution Approach 1:
The multiple second folded parts are connected to the distal end portion of the first folded part in a nested arrangement, allowing the airbag to be compactly stored within the case body while maintaining the ability to rapidly deploy when inflated, as the nested structure naturally unfolds during expansion.
3Device complexity
If the airbag main body uses a simple folding method, then the device complexity is reduced, but the occupant restraint performance deteriorates
Solution Approach 1:
Different folded parts of the airbag main body have different structural characteristics and connection methods. The first folded part includes a gas introduction opening at its base end portion, while multiple second folded parts are connected to its distal end portion, creating local variations in structure that optimize both simplicity and occupant restraint 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
This configuration enables smoother and more efficient deployment of the airbag main body during inflation, reducing the load on the connecting point and enhancing occupant restraint performance.
Implementation Method 1
a first folded part including an opening for gas introduction in a base end portion of the first folded part
Data Source
AI summary
An airbag device includes an airbag main body formed in a bag shape, and a case body in which the airbag main body folded is stored. The airbag main body includes a first folded part including an opening for gas introduction provided in a base end portion of the first folded part, and multiple second folded parts connected to a distal end portion of the first folded part. The airbag main body folded is stored in the case body such that a connecting part among the first folded part and the second folded parts faces a door part of the case body.