| 摘要 |
PROBLEM TO BE SOLVED: To surely introduce gas from a tongue of an air belt device to a buckle, prevent generating noise, and prevent the entry of a foreign matter into the buckle. SOLUTION: A piston 60 is pushed up with gas from an inflator provided on a buckle, a tip end of the piston 60 gets into a duct of a tongue, and a cover 66 bursts to supply the gas into a duct 20. An O-ring 72 is equipped to the piston 60, the O-ring 72 slides with an inner peripheral surface of a piston holder 50 and abuts on a brim portion 52 of the piston holder 50. |
