Patent ID: 8388021

Claim:
A passenger seat airbag apparatus comprising: an airbag which is housed in a folded state inside an instrument panel that is located in front of a passenger seat, and which inflates toward a passenger sitting in the passenger seat with a supply of gas during a frontal collision of a vehicle, and which has a vent hole that can be opened and closed; a tether whose first end is linked to a periphery of the vent hole in the airbag, and which closes the vent hole due to tension that is caused when the airbag inflates; a casing of an actuator which has a first hole that a second end of the tether is passed through and that is linked to the tether, and which discontinues a linked state of the tether by cutting the tether if a predetermined condition is satisfied; a protective member that is attached to the casing of the actuator so as to cover at least an edge portion of the first hole, and that is interposed between the edge portion and the tether; an opening that is smaller than the first hole of the casing of the actuator is formed in the protective member; the opening of the protective member is superposed with the first hole when the protective member is attached to the actuator; the casing of the actuator has at least two first holes, the actuator is in a cylindrical shape; the protective member has at least two openings, the protective member is a cylindrical cover; one of the first holes is superposed with one of the openings of the protective members, and the other of the first holes is superposed with the other of the openings of the protective member; and the two first holes of the casing of the actuator are each provided in a diameter direction of the actuator, the two openings of the protective member are each provided in a diameter direction of the cover.