Airbag Gas Generator Bead Structure for Weld Joint Relief

The patent applies local quality by introducing a bead structure at the specific location where the housing meets the closure element. This bead concentrates reinforcement at the critical stress point rather than requiring the entire welded joint to have large cross-sectional surface. The bead creates a localized geometric feature that improves stress distribution and joint reliability without increasing overall joint complexity

The bead introduced in the housing creates a curved, spherical-like geometric feature at the joint location. This curvature helps distribute stresses more evenly across the welded joint during load cycling tests, preventing stress concentration at sharp corners or flat transitions. The rounded geometry of the bead naturally redirects stress flows, improving joint reliability without requiring larger joint dimensions

Instead of increasing the cross-sectional surface area of the entire welded joint, the bead introduces localized geometric reinforcement only at the critical stress concentration point where the housing meets the closure element. This targeted approach achieves the necessary joint strength improvement without the material and manufacturing costs associated with enlarging the entire joint structure

The bead's curved geometry provides structural reinforcement that improves joint strength through stress distribution rather than through increased material quantity. This geometric solution is more cost-effective than adding substantial material, as it achieves strength improvement through intelligent shape design rather than brute-force material addition