| 摘要 |
Expansion of an air bag can be smoothly effected even in a small space by controlling the air bag in thickness and introduction of the gas for expansion, and the protection of an occupant can be rapidly implemented with a relatively small volume of the gas. An air bag device comprises a first air chamber 12 for protection of the chest or the waist of an occupant, a second air chamber 14 for protection of the head of the occupant, and a lower portion of the diffuser bag 30 interposed therebetween for portioning out gas from an inflator 20 , wherein the second air chamber 14 has a first tether 50 forming a gas passage 14 a for guiding gas jetted from gas outlets of the lower portion of the diffuser bag 30 into the second air chamber 14 so as to go around the tether of a head protection region of an air bag 1 , from the back side thereof toward the front side thereof, and has a second tether 52 for forming a gap provided at the lower end of the first tether 50 in the vicinity of the gas outlets, for letting a portion of the gas escape into a front part of the second air chamber 14.
|
