Airbag Blocking Member Inversion for Rapid Gas Discharge
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Solution Overview
Problem
Existing airbag devices face challenges in achieving prompt gas discharge when the internal pressure adjustment exhaust hole is opened, while maintaining good airtightness when blocked, due to the tubular nature of the blocking member which restricts efficient gas release.
Innovation Solution
The airbag device incorporates a flexible sheet material blocking member with a first and second panel portion, a through hole, and a coupling member that allows the blocking member to invert and discharge gas promptly when the holding unit releases, ensuring efficient pressure adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tubular blocking member is used to block the exhaust hole, then good airtightness is achieved when blocked, but gas discharge is delayed when opened
Solution Approach 1:
The blocking member is divided into multiple panel portions (first panel portion, second panel portion, third panel portion) that can move independently. This segmentation allows different parts to perform different functions: the first panel portion maintains airtightness when blocking, while the second and third panel portions can rapidly invert to open the exhaust hole for prompt gas discharge.
Solution Approach 2:
The blocking member transitions from a static tubular structure to a dynamic multi-panel structure that can invert. The coupling member connects these panels in a way that allows rapid inversion when the holding and releasing unit releases, enabling the blocking member to quickly switch from blocking state to open state for immediate gas discharge.
2Reliability
If the blocking member is held in place by the holding and releasing unit, then airtightness is maintained, but the response time to open the exhaust hole is delayed
Solution Approach 1:
The blocking member is pre-positioned in the blocking state with the first panel portion covering the exhaust hole and the coupling member ready for rapid inversion. The holding and releasing unit maintains this pre-positioned state, and upon release, the stored potential energy enables immediate inversion and gas discharge without delay.
Solution Approach 2:
The blocking member utilizes the pressure differential and its own structural design to achieve rapid inversion when released. The coupling member's configuration allows the blocking member to automatically invert under the influence of internal pressure without requiring additional actuation mechanisms, reducing response time.
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 configuration enables rapid gas discharge when the exhaust hole is opened while maintaining airtightness when blocked, effectively managing internal pressure and ensuring the airbag's functionality.
Implementation Method 1
owing to being pressed by inflating gas
Data Source
AI summary
An airbag device includes an airbag, a blocking member that can adjust an exhaust hole of the airbag to a blocked state and an opened state, a coupling member, and a holding and releasing unit, which maintains a state of blocking the exhaust hole by holding the coupling member. When the holding and releasing unit releases the holding of the coupling member, the blocking member inverts in such a way as to be fed out from an inner peripheral face side of the airbag to an outer peripheral face side through the exhaust hole owing to being pressed by inflating gas, and causes inflating gas to be discharged from a through hole formed between leading end regions of outer peripheral edges of a first panel portion and a second panel portion in the blocking member and a communication hole communicating with the exhaust hole.