Passenger Airbag Door Structure for Uniform Crash Pad Breakage
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Solution Overview
Problem
Existing passenger air bag devices face issues with irregular breakage of the crash pad cutting line during deployment, leading to potential air bag damage and passenger injury, especially in low-temperature environments.
Innovation Solution
The introduction of a protruding portion on the air bag door that fills the space of the cutting groove, providing structural support and ensuring the breakage occurs along the intended cutting line, thereby stabilizing the deployment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cutting groove is formed in the crash pad to enable air bag deployment, then the air bag can deploy through the cutting line, but the cutting line becomes irregular and may cause harmful factors such as air bag damage and passenger injury
Solution Approach 1:
A protruding portion is provided on the air bag door that corresponds to the cutting groove position, performing preliminary support action before deployment. This protruding portion prevents irregular breakage by providing structural reinforcement at the cutting line location, ensuring uniform cutting and preventing harmful factors during deployment
Solution Approach 2:
The protruding portion acts as an intermediary element between the air bag door and the cutting groove. It mediates the interaction by filling the cutting groove space and providing uniform support during breakage, transforming the irregular cutting line problem into a controlled deployment process
2Strength
If the air bag door is welded to cover the cutting groove, then structural integrity is maintained, but the cutting line cannot break uniformly leading to deployment issues
Solution Approach 1:
The protruding portion is strategically positioned to correspond with the cutting groove, creating local reinforcement only where needed. This local quality approach maintains overall structural integrity while ensuring uniform breaking characteristics at the specific cutting line location, resolving the contradiction between strength and manufacturing precision
Data Source
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AI summary
Disclosed is a passenger air bag (PAB) device that includes a crash pad (10) and a PAB chute (20). The crash pad includes a cutting groove (110) recessed at a predetermined depth in an inner side surface of the crash pad. The PAB chute includes an air bag door (200) welded to the inner side surface in a shape covering the cutting groove. The air bag door includes a protruding portion protruding from a surface of the airbag door, disposed, in a state in which the air bag door is welded to the inner side surface, inside a space forming the cutting groove.