Vehicle airbag device

A vehicle airbag device comprising:

• a gas generation portion that generates gas when activated;
• an airbag which is housed in a folded state when the gas generation portion is not activated, and which inflates and deploys by receiving supply of a gas when the gas generation portion is activated, and whose two side portions are provided with vent holes for letting out the gas;
• a tether that includes pair of left and right side portions whose base end portions are fixed to a gas generation portion-side site or a site on a side of the airbag opposite to an occupant side, and which extend along internal side surfaces of the two side portions of the airbag, and an intermediate portion that interconnects occupant-side end portions of the pair of left and right side portions in an airbag transverse direction;
• and
• a vent hole opening-closing control portion that maintains an open state of the vent holes when a pressing force that acts on the intermediate portion of the tether is less than a predetermined value, and that closes the vent holes by moving the pair of left and right side portions relative to the internal side surfaces of the two side portions of the airbag when the pressing force on the intermediate portion of the tether is greater than or equal to the predetermined value.

A airbag body for a vehicle airbag device comprising:

• an airbag which is housed in a folded state when a airbag device is not activated, and which inflates and deploys by receiving supply of a gas when the airbag device is activated, and whose two side portions are provided with vent holes for letting out the gas;
• a tether that includes pair of left and right side portions whose base end portions are fixed to a gas generation portion-side site or a site on a side of the airbag opposite to an occupant side, and which extend along internal side surfaces of the two side portions of the airbag, and an intermediate portion that interconnects occupant-side end portions of the pair of left and right side portions in an airbag transverse direction;
• and
• a vent hole opening-closing control portion that maintains an open state of the vent holes when a pressing force that acts on the intermediate portion of the tether is less than a predetermined value, and that closes the vent holes by moving the pair of left and right side portions relative to the internal side surfaces of the two side portions of the airbag when the pressing force on the intermediate portion of the tether is greater than or equal to the predetermined value.