Patent ID: 7827571

Claim:
A disk drive device for recording and reproducing data to and from a disc on rotation with the use of an optical head, the disc drive device comprising: a cover configured to house through an intermediary of a guide rack; a stream restricting member, said stream restricting member being incorporated in an air gap part which is formed between an outer peripheral part of a circular recess in a disc tray and said cover, wherein a gap of said air gap part comprises a size between 0.5 mm and 2.0 mm, and wherein said stream restricting member is further configured to block one of the streams at a convergence point along the outer peripheral point of the disc, in order to reduce an amount of turbulence and/or noise which is generated at the converging point, in which air streams branch into two branches at a stepped part in a rear part of the disc tray and said branched air streams converge again.