Patent ID: 8403358

Claim:
An internal airbag device comprising: an inflator; an airbag housing mounted in a roof in a region between a front seat and a rear seat; and an airbag received in the airbag housing to deploy downwards by gas supplied from the inflator, wherein the airbag includes: a horizontal airbag section supported by the roof when the gas is supplied therein in a deployment thereof; and a vertical airbag section, an upper portion of which vertically extends from a rear end of the horizontal airbag section opposite the rear seat in a deployment thereof and receives gas from the rear end of the horizontal airbag section; wherein the rear end of the horizontal airbag section is aligned toward the rear seat; and wherein a rear outer portion of the vertical airbag section is connected to the roof by at least a tether in order to reinforce the strength of the deploying airbag.