Airbag Tether Mounting Base for Oscillation Control
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Solution Overview
Problem
Existing airbag devices for front passenger seats have complex configurations and increased manufacturing costs due to the use of outer tethers, which complicate the deployment process and lead to oscillation during airbag deployment.
Innovation Solution
The airbag device features a shared mounting base for the front-rear tether and recess-pulling tether, which are configured to bifurcate rearward and deploy along a front and rear direction, eliminating the need for an outer tether by using a recess-pulling tether to pull the arresting recess forward forcefully, thus preventing oscillation and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an outer tether is used to prevent sub bag section from protruding and oscillating, then deployment stability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the outer tether from the airbag system. Instead of using an outer tether to prevent oscillation, the patent uses an inner tether (recess-pulling tether) that is integrated within the airbag structure to pull the arresting recess forward during deployment, thereby preventing oscillation without requiring an external tether component.
Solution Approach 2:
The invention introduces the recess-pulling tether as an intermediary element that connects the mounting base to the arresting recess. This tether acts as a mediator to control the movement of the arresting recess during deployment, ensuring stable deployment without needing an outer tether. The tether transfers force from the mounting base to the arresting recess, enabling precise control of the airbag's deployment behavior.
2Reliability
If an outer tether is used to prevent airbag oscillation, then deployment stability is improved, but manufacturing workload and cost increase
Solution Approach 1:
The invention merges the functions of preventing oscillation and controlling deployment into a single integrated system. The recess-pulling tether is combined with the airbag structure and the arresting recess, eliminating the need for a separate outer tether. This integration simplifies the manufacturing process by reducing the number of components that need to be assembled and the complexity of the deployment mechanism.
Solution Approach 2:
The airbag structure is designed to be self-regulating during deployment. The recess-pulling tether automatically pulls the arresting recess forward as the airbag inflates, using the inflation pressure itself to drive the desired deployment behavior. This self-service mechanism eliminates the need for external control systems or additional tethering components, thereby simplifying manufacturing.
3Device complexity
If a shared mounting base is used for front-rear tether and recess-pulling tether, then device complexity is reduced, but deployment control precision must be maintained
Solution Approach 1:
The mounting base is designed as a universal component that serves multiple functions: it anchors both the front-rear tether and the recess-pulling tether, and it provides a common reference point for controlling the deployment of both tethers. This multi-functional design reduces the number of separate mounting structures needed while maintaining precise control over deployment through the strategic positioning of tether attachment points on the mounting base.
Data Source
AI summary
An airbag device for a passenger seat is disclosed. The airbag includes a main section whose rear plane forms a front-collision arresting plane, and a sub section which is disposed on a side of the main section and includes a protruding region protruding farther rearward than the main section. The side plane of the protruding region forms an oblique-collision arresting plane. Between the front-collision- and oblique-collision arresting planes is an arresting recess denting forward. The airbag further internally includes a front-rear tether jointed to the front-collision arresting plane, and a recess-pulling tether jointed to the bottom of the arresting recess. The front-rear tether and recess-pulling tethers share a mounting base by which the tethers are mounted on an airbag case, and bifurcate from the mounting base. The front-rear tether extends from a rear edge of the mounting base, and the recess-pulling tether extends from an edge of the mounting base adjoining the front-rear tether.