Airbag and airbag device

摘要

To provide an airbag and an airbag device that can keep the internal pressure of the airbag in the initial stage of inflation and deployment high. An airbag includes a first chamber and a second chamber. The first chamber includes a nozzle forming a flow path capable of communicating with the second chamber, and a tether connecting the inner surface of the nozzle and the inner surface of the first chamber. During the inflation and deployment of the first chamber, the supply of gas to the second chamber is prevented by retracting the nozzle into the first chamber. After the first chamber is expelled into the cabin and when a predetermined external pressure is loaded on the first chamber, the nozzle is expelled into the second chamber so as to allow gas to be supplied to the second chamber.

主权项

1. An airbag that is normally housed in a folded state in a vehicle structure and is inflated and deployed with supply of gas in an emergency, the airbag comprising:
a first chamber at a first end of which an inflator supplying the gas is disposed; and a second chamber disposed at a second end of the first chamber, the first chamber including a nozzle forming a flow path capable of communicating with the second chamber, a tether connecting the inner surface of the nozzle and the inner surface of the first chamber, and a guide portion that is disposed opposite to a sewn part of the tether such that the tether can be inserted through the guide portion, wherein, during the inflation and deployment of the first chamber, the supply of gas to the second chamber is prevented by retracting the nozzle into the first chamber, and after the first chamber is expelled into a cabin and when a predetermined external pressure is loaded on the first chamber, the nozzle is expelled into the second chamber so as to allow gas to be supplied to the second chamber.