Patent ID: 7132145

Claim:
A vibration welding structure for fixing an instrument panel attachment wherein the attachment is vibration-welded to an instrument panel by first positioning said attachment on and along the instrument panel and then vibrating either one of the instrument panel and the attachment, wherein a projection having a generally trapezoidal shape progressively decreasing in width from a proximal end thereof to a distal end thereof and being resiliently deformable in a predetermined vibrating direction is provided on one of the instrument panel and the attachment so as to project toward the other of the instrument panel and the attachment, wherein a fitting portion is provided in the other of the instrument panel and the attachment for fitting engagement with a distal end portion of said projection, said one of the instrument panel and the attachment has a recessed portion facing said fitting portion in the other of the instrument panel and the attachment, said projection is disposed on the recessed portion and projecting therefrom toward the fitting portion, said fitting portion comprises a groove for receiving therein the distal end portion of the protection, and wherein positioning means for positioning said attachment relative to the instrument panel in a direction perpendicular to the predetermined vibrating direction is provided between said instrument panel and said attachment, and wherein said positioning means comprises: at least one locking block disposed on one of the instrument panel and the attachment, and an opening portion formed in the other of the instrument panel and the attachment for fitting engagement with the at least one locking block in said direction perpendicular to the predetermined vibrating direction.