| 主权项 |
1. An air-bag device, comprising:
an air bag stored in an inner side of a backrest in a vehicle width direction; and an inflator that inflates and expands the air bag, wherein the air bag includes
a first chamber that houses the inflator such that a longitudinal direction of the inflator matches a vertical direction of the air bag,a second chamber that is located above the first chamber and is inflated and expanded by a gas ejected from an upper end of the inflator to form a tubular shape extending upward above the first chamber, anda third chamber that is inflated and expanded at a position lateral to the second chamber; the first chamber is separated from the third chamber by a first partition, and the second chamber is separated from the third chamber by a second partition that extends from an upper edge of the air bag along a longitudinal direction of the air bag; a first flow path that allows the gas to flow from the second chamber into the third chamber is formed between an upper end of the first partition and a lower end of the second partition; and a second flow path that allows the gas to flow from the first chamber into the third chamber is formed between a lower end of the first partition and a lower edge of the air bag. |
