Airbag Module Case Raising Member for Uniform Deployment
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Solution Overview
Problem
Existing front passenger seat airbag devices with left-right asymmetrical structures face challenges in stabilizing deployment behavior due to uneven deployment loads and the risk of spacers falling off during inflation, and in achieving uniform deployment of airbag doors on both sides.
Innovation Solution
A front passenger seat airbag device configuration where the folded height of the first airbag section is lower than the second, with a raising member to align the upper faces of both sections, ensuring equal deployment loads on the airbag door and stabilizing deployment behavior without using a spacer, and utilizing inflators of different heights to manage gas distribution effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a spacer is set on the first airbag section side of the back face of the airbag door to equalize deployment loads, then the airbag door opens out uniformly without bias, but the spacer may fall off during inflation and deployment
Solution Approach 1:
The invention removes the spacer component from the airbag door back face and instead integrates the height adjustment function directly into the module case structure through the raising member. This extraction eliminates the spacer's reliability issue while maintaining the uniform deployment load distribution on the airbag door.
Solution Approach 2:
The raising member acts as an intermediary structure between the module case bottom face and the first airbag section. It provides the necessary height adjustment to align the upper faces of both airbag sections without requiring a separate spacer on the airbag door, thus mediating the height difference issue structurally.
2Shape
If the folded height of the first airbag section is made lower than the second airbag section, then the asymmetrical structure is achieved, but the deployment loads on the airbag door become uneven causing biased opening
Solution Approach 1:
The invention intentionally designs the first and second airbag sections with different folded heights to create an asymmetrical structure that matches the typical occupant position. The raising member compensates for this asymmetry by elevating the first airbag section's support face, ensuring uniform deployment loads despite the asymmetrical folded configuration.
Solution Approach 2:
The raising member provides localized height adjustment only at the first airbag section's support position, leaving the second airbag section's support face at its original height. This local quality change allows the asymmetrical structure to function properly while achieving uniform deployment characteristics.
3Stability of the object's composition
If a raising member is introduced to align the upper faces of both airbag sections, then uniform deployment loads are achieved, but the device complexity increases
Solution Approach 1:
The raising member is integrated as part of the module case structure rather than being a separate removable component. The module case bottom face incorporates the raising member design, merging the support function and height adjustment function into a single integrated structure, thereby minimizing additional complexity.
Solution Approach 2:
The module case structure serves multiple functions: it houses the airbag sections, provides structural support, and incorporates the raising member for height adjustment. By making the module case multi-functional, the invention avoids adding dedicated separate components for each function, thus reducing overall device 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 stabilizes the deployment behavior of the front passenger seat airbag by ensuring uniform deployment loads on both sides of the airbag door, preventing spacer-related issues and enhancing ease of installation and cost-effectiveness by eliminating the need for additional components.
Implementation Method 1
an inflator that is disposed at a bottom portion side of the module case and that on actuation supplies gas into the front passenger seat airbag
Data Source
AI summary
A front passenger seat airbag device includes a module case; a front passenger seat airbag configured such that, in a folded state, a height of a first airbag section positioned at a vehicle outer side is lower than a height of a second airbag section positioned at a vehicle inner side, and widths of the first airbag section and the second airbag section are substantially the same; an inflator disposed at a bottom side of the module case; and a raising member disposed at a bottom portion of the module case, and that raises a height of a first support face supporting the first airbag section to be higher than a height of a second support face supporting the second airbag section, such that a height of an upper face of the first airbag section is substantially aligned with a height of an upper face of the second airbag section.