Airbag Module Detachment Mechanism
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Solution Overview
Problem
Existing front airbag devices require complex operations for detachment from the steering wheel, making maintenance cumbersome.
Innovation Solution
A front airbag device design featuring a positioning hook and retaining hook system with a tiltable positioning tab and elastic body, allowing for easy detachment using a tool through a window portion, reducing labor and time required for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detachment jig is inserted from the rear side of the steering wheel to disconnect the spring steel from the hook, then the airbag device can be detached from the steering wheel, but the operation becomes complex and time-consuming
Solution Approach 1:
Instead of inserting a detachment jig from the rear side of the steering wheel to disconnect the spring steel from the hook, the invention inverts the approach by providing a detachment hole in the rear surface of the housing that allows direct access to the positioning tab. This enables the tab to be tilted and the airbag module to be detached from the front side, completely eliminating the need for complex rear-side jig insertion and hook disconnection operations.
Solution Approach 2:
The invention extracts the essential detachment function from the complex spring steel and hook mechanism. By providing a detachment hole that allows direct access to the positioning tab, the system separates the detachment operation from the steering wheel structure, enabling simple removal of the airbag module without involving the spring steel connection mechanism.
2Ease of operation
If the positioning tab is made tiltable to connect or disconnect from the positioning hook, then the attachment and detachment become simpler, but the structure becomes more complex
Solution Approach 1:
The positioning tab serves multiple functions: it connects to the positioning hook for secure attachment, tilts to disconnect from the hook for detachment, and can be accessed through the detachment hole for maintenance operations. This multi-functionality eliminates the need for separate mechanisms for attachment, detachment, and maintenance, simplifying the overall system despite the tab's versatile role.
3Reliability
If the airbag module is securely attached to the steering wheel, then the reliability of attachment is improved, but the detachment operation becomes more difficult
Solution Approach 1:
The positioning tab is designed to be tiltable, transitioning between a locked position (connected to the positioning hook) and an unlocked position (disconnected from the hook). This dynamic characteristic allows the system to maintain strong attachment during normal operation while enabling easy detachment when needed, resolving the contradiction between secure attachment and easy removal.
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
Enables simple and efficient detachment of the airbag module from the steering wheel, reducing maintenance time and effort.
Implementation Method 1
an elastic body on which the retaining hook is hooked when the airbag module moves in the direction of being removed from the steering wheel
Data Source
AI summary
A front airbag device in which an airbag module can be detached from a steering wheel with a simpler operation is provided. A front airbag device includes a steering wheel and an airbag module. The airbag module includes a housing. The steering wheel includes a positioning hook and a retaining hook. The housing includes a positioning tab on which the positioning hook is hooked and a rod-shaped elastic body on which the retaining hook is hooked. The positioning tab has an extension portion, and the steering wheel has a window portion which enables the extension portion to be visible from the outside. The positioning tab is tilted whereby the positioning tab is disconnected from the positioning hook and the elastic body can move.