US Patent 11912226 Airbag device

An airbag device for a vehicle provided with a door and a side sill includes an airbag and an application state detector. The airbag is deployed from a container to be disposed on a lower side of the door on a vehicle body to a region on a vehicle-widthwise outside of the door. The application state detector detects a load application state of a load from the airbag to the vehicle body. The airbag includes a first air chamber, a second air chamber, and an internal pressure controller. The first air chamber transmits a load applied from the vehicle-widthwise outside to a side surface of the side sill. The second air chamber couples a lower part of the first air chamber and the container. The internal pressure controller controls an internal pressure of the second air chamber based on the load application state detected by the application state detector.