Side Airbag Wire Harness Locking Mechanism
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Solution Overview
Problem
Existing side airbag devices face issues where operators may mistakenly handle the wire harness during assembly, leading to a large tensile load on the connection end portion due to the weight of the airbag device, resulting in a complicated configuration to address this problem.
Innovation Solution
A side airbag device design featuring a wire harness with a first locking portion and a wrapping sheet with a second locking portion, where the locking portions are securely locked to each other, preventing displacement and reducing the tensile load on the connection end, while maintaining a simplified configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the wire harness is led out to the outside of the wrapping sheet without a locking mechanism, then the configuration is simple, but the wire harness may be erroneously handled and subjected to large tensile load
Solution Approach 1:
The locking portion is provided in advance on the wire harness before assembly, and the wrapping sheet is designed with a corresponding locking structure. This preliminary preparation ensures that when the wire harness is led out through the wrapping sheet, it is automatically locked in place, preventing erroneous handling and tensile load on the connection end portion without requiring complex additional components.
2Reliability
If a locking mechanism is added to the wire harness to prevent erroneous handling, then the reliability improves, but the configuration becomes complicated
Solution Approach 1:
The locking portion is integrated directly into the wire harness structure itself, merging the locking function with the existing wire harness components. This integration eliminates the need for separate, additional locking devices, thereby improving reliability while avoiding increased device complexity. The wrapping sheet's locking structure is similarly integrated into its design.
Data Source
AI summary
A side airbag device includes: a side airbag in a folded state; a gas generator that includes an attachment portion to be attached to a vehicle, and that is configured to generate inflation gas to be supplied to the side airbag; a wrapping sheet that covers peripheries of the side airbag and the gas generator, and that is breakable when the side airbag is deployed and inflated; and a wire harness that includes a connection end portion electrically connected to the gas generator, and that is led out to an outer portion of the wrapping sheet. The wire harness is provided with a first locking portion, and the wrapping sheet is provided with a second locking portion that is locked to the first locking portion.