US Patent 7148421 Vehicle outlet cover

A lid (20) and a cover main body (10) are formed with sliding contacts (17, 23) that slide in sliding contact with each other immediately before the lid (20) reaches a lid-closing position for damping biasing forces given from coil springs (30) to the lid (20). Frictional resistance is created by the sliding contact of the sliding contacts (17, 23) and the biasing forces given from the torsion coil springs (30) to the lid (20) are damped by this frictional resistance. In this way, an impact given when the lid (20) reaches the cover main body (10) at the lid-closing position is alleviated.