Airbag Retainer Pressing Section Gas Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing airbag devices face issues with gas leakage due to gaps between the inflator and retainer, which can hinder smooth inflation of the airbag during assembly and mounting on a vehicle.
Innovation Solution
The airbag device incorporates a retainer with a mounting base section that includes a storing dent section for the inflator's mounting means and a pressing section that contacts the inflator's circumference, preventing gas leakage by directing the inflation gas into the airbag while allowing easy insertion and secure mounting of the inflator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inflator's first end portion with fixing means is disposed outside the airbag for mounting purposes, then the airbag and inflator can be mounted on the vehicle body member, but gas leakage occurs via the gap between the holding section of the retainer and the inflator
Solution Approach 1:
A sealing member (rubber ring or gasket) is introduced as an intermediary component between the inflator body and the holding section of the retainer. This sealing member fits onto the outer circumference of the inflator body and is received by a groove or groove-like portion in the holding section, creating a reliable gas seal without preventing the mounting configuration where the fixing means protrudes outside the airbag.
2Reliability
If a sealing measure is added to prevent gas leakage between the inflator and retainer, then gas sealing is improved, but the assembly structure becomes more complex
Solution Approach 1:
A flexible sealing member made of elastomeric material (such as rubber) is used to create the gas seal. This flexible ring or gasket can deform to accommodate manufacturing tolerances and assembly variations, providing reliable sealing while maintaining a relatively simple overall structure. The sealing member is retained by a groove in the holding section, eliminating the need for complex sealing mechanisms.
Data Source
AI summary
A retainer and an inflator are disposed inside the airbag. The retainer includes a mounting base section, a holding section which extends from the mounting base section and receives and holds an inflator therein, and a second mounting means which protrudes from the mounting base perpendicularly. The inflator includes a cylindrical body provided with a gas release section and, a first mounting means protruding from a region of the body disposed outside the airbag. The retainer further includes a storing dent section which receives the first mounting means of the inflator so as to conform an orientation of the first means to that of the second mounting means and, a pressing section disposed proximate the storing dent section. The pressing section is brought into close contact with a circumferential area of the body of the inflator when the first mounting means of the inflator is secured to a vehicle body.