| 摘要 |
A vehicle air bag installation including an inflatable air bag assembly mounted in a rectangular opening in the vehicle instrument panel for deployment of the air bag through the opening. A rectangular door engages a recessed abutment around the opening when closed. A plurality of spaced apertures are provided in spaced brackets supported by the instrument panel in a recessed region for receiving fasteners for attaching the door to the instrument panel. The fasteners comprise thermoplastic resin bodies having a cylindrical bulbous head, flared wings or shoulders extending from the bulbous head for providing height alignment, a lower portion for centering the fastener in the aperture comprising a plurality of gripping teeth formed as an angled flute for securing the door to the instrument panel. Integral channels molded into the underside of the cover substrate releasably engage the heads of the fasteners. The door having the fasteners secured to channels in its underside is assembled to the instrument panel by aligning the fasteners with the apertures in the spaced brackets. The fasteners are inserted into the apertures and are secured therein by the gripping teeth portion of the fastener to prevent inadvertent premature movement of the door. Upon deployment of the air bag, the door is pushed out of the instrument panel surface with the fasteners disengaging from the channels in the underside of the door.
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