Cooling and Selective Dust Shielding of Optical Pick-Up Unit in Dvd Disc Drive

摘要

A DVD data drive ( 2 ) includes a disc drive housing ( 4 ) that includes a DVD cartridge ( 16 ) and an optical pick-up unit ( 10 ) joined to the DVD cartridge ( 16 ) such that sensitive parts of the OPU ( 10 ) may extend within the DVD cartridge ( 16 ) and are shielded from the inner environment ( 6 ) of the disc drive housing ( 4 ). A fan ( 22 ) and air inlet provide ( 20 ) for cooling the OPU ( 10 ) and DVD cartridge ( 16 ) by the forced convection of unfiltered cooling air directed through the disc drive housing ( 4 ). The OPU ( 10 ) and DVD cartridge ( 16 ) are joined by a dust seal ( 30 ) that ensures that the cooling air directed through the disc drive housing ( 4 ) is shielded from sensitive parts of the OPU ( 10 ) which remains dust-free.