Disk drive assembly with a disk drive module rotatable on a chassis between an exposed position and a concealed position

A disk drive assembly adapted to be disposed within a computer housing, said disk drive assembly comprising:

• a chassis adapted to be disposed fixedly on the computer housing and having an upright front plate that is adapted to define an opening in the computer housing;
• a module-mounting seat disposed pivotally on said chassis and having an engaging portion, said seat being rotatable on said chassis between an exposed position and a concealed position;
• a disk drive module attached to said seat and having an outer end that is aligned with and that is exposed within said opening when said seat is disposed at said exposed position, said module being deflected from said opening and being concealed behind said front plate of said chassis when said seat is disposed at said concealed position;
• a biasing unit for biasing said seat from said concealed position to said exposed position;
• and
• a driving mechanism including
• an engaging element aligned with said engaging portion of said seat when said seat is disposed at said concealed position,
• a biasing element for biasing said engaging element to engage said engaging portion of said seat when said seat is disposed at said concealed position, thereby retaining said seat at said concealed position, and
• an actuator member connected operably to said engaging element and operable so as to remove said engaging element from said engaging portion of said seat against biasing action of said biasing element when said seat is disposed at said concealed position, such that said seat is biased by said biasing unit to rotate from said concealed position to said exposed position, after which said seat can be rotated forcibly from said exposed position to said concealed position such that said engaging element engages said engaging portion of said seat by action of said biasing element when said actuator member is released.