Side Airbag Module Layout to Prevent Harness Interference
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Solution Overview
Problem
The existing side airbag devices face challenges with harness interference during deployment due to complex harness routing and increased size from external stay cloth brackets, which affects rigidity and space utilization.
Innovation Solution
A side airbag device design featuring a base member with a concave airbag storage portion and a retainer member that allows the harness to pass through without external interference, combined with an internal stay cloth bracket attachment to minimize size and maintain rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inflator is stored in the storage casing on the rear side of the base cover, then the airbag can be inflated and deployed, but the harness routing becomes complex and the harness may interfere with the airbag during deployment
Solution Approach 1:
The base cover is divided into a front cover and a rear cover that can be detached from each other. The harness passes through the rear cover, allowing it to be routed separately from the airbag deployment path. This segmentation enables independent optimization of harness routing and airbag deployment, preventing interference between the two components.
Solution Approach 2:
A guide member is introduced as an intermediary component to guide the harness from the rear cover to the front cover. This guide member ensures that the harness follows a predetermined path that avoids the airbag deployment area, thereby preventing harness-airbag interference while maintaining reliable electrical connection.
2Ease of operation
If the stay cloth bracket is attached to the outside of the base member, then the stay cloth can guide the deployment direction of the airbag, but the side airbag device increases in size
Solution Approach 1:
The stay cloth bracket is integrated with the base member, merging two previously separate components into one. The bracket is formed as part of the base member structure, eliminating the need for external attachment and reducing the overall device volume while maintaining the airbag deployment guidance function.
Solution Approach 2:
The stay cloth bracket is positioned within the storage casing structure, nesting it inside the existing component boundaries rather than extending externally. This nesting approach allows the bracket to perform its guidance function while occupying space that would otherwise be unused, thereby minimizing the device footprint.
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 design prevents harness interference, maintains base member rigidity, and efficiently uses space, resulting in a miniaturized side airbag device with improved deployment stability.
Implementation Method 1
an inflator supplying a gas into the airbag
Data Source
AI summary
A side airbag device capable of preventing interference between a harness and an airbag is provided between a vehicle body and a seat. The side airbag device includes an airbag module an inflatable airbag and an inflator supplying a gas into the airbag, a base member including an airbag storage portion having a concave shape and storing the airbag module and is attached between a vehicle body door and the seat, and a retainer member holding the airbag storage portion from the rear side of the vehicle body. The base member includes a first through hole through which a harness of the inflator is inserted and a flange which is formed in the periphery of the first through hole. The retainer member includes a second through hole through which the harness of the inflator is inserted and which is provided at a position facing the first through hole.