Patent ID: 7533898

Claim:
An airbag cover to be mounted on a vehicle, comprising: a housing case for housing a passenger airbag; an airbag-cover body portion covering the passenger airbag housed in the housing case and having a tear line for rupturing the airbag cover; and a plate-shaped developing door formed in the airbag-cover body portion and defined by the tear line, to be opened upon inflation of the passenger airbag, said plate-shaped developing door comprising: a first developing portion provided in the airbag-cover body portion and concavely curved so as to be depressed toward the housing case; a second developing portion provided on the housing case and having an extending surface facing the first developing portion; a frame member having the second developing portion therein and unitarily formed therewith; a plurality of standing portions integrally formed with the first developing portion and extending from the first developing portion toward the extending surface on the second developing portion; and a contact area formed at the extending surface and tip end portions of the standing portions, said contact area being arranged to provide vibration welding such that the first developing portion and the second developing portion join together at the standing portions by relative vibration in a vibrating direction along the extending surface.