Magnetic disc unit with range of gap between disc and shroud
AssigneeHitachi Global Storage Technologies Japan, Ltd.
InventorsMikio Tokuyama, Hayato Shimizu, Satomitsu Imai, Shozo Saegusa, Masahiko Sega, Toshihisa Okazaki, Yuzo Yamaguchi
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Abstract
A magnetic disc unit having a rotating disc type magnetic disc, a head for recording and reproducing data to and from the magnetic disc, and a shroud surrounding an end surface of an outer periphery of the magnetic disc, except a part where a carriage arm is inserted, wherein a gap between the outer peripheral end surface of the magnetic disc and the shroud is set in a range which is greater than 0.1 mm but not greater than 0.6 mm.
Claims14
A magnetic disc unit comprising a rotating disc type magnetic disc, a head for recording and reproducing data to and from said magnetic disc, and a shroud surrounding an end surface of an outer periphery of said magnetic disc, except a part where the carriage arm is inserted, wherein a gap between the outer peripheral end surface of said magnetic disc and the shroud is set in a range which is greater than 0.1 mm but not greater than 0.6 mm.
A magnetic disc unit comprising a rotating disc type magnetic disc, a head for recording and reproducing data to and from the magnetic disc, and a shroud surrounding the magnetic disc so as to define a gap between the shroud and an outer peripheral end surface of the magnetic disc which is greater than 0.1 mm but not greater than 0.6 mm, wherein air on one surface side of the magnetic disc is isolated from air on an other surface side of the magnetic disc so as to reduce a pressure differential between both of the one and the other surface sides of the magnetic disc.
A magnetic disc unit having a base, comprising, on the base, a magnetic disc, a spindle motor for rotating the magnetic disc, and a carriage for moving a head, for recording and reproducing data to and from the magnetic disc, between outer and inner peripheries of the magnetic disc, wherein the carriage and a wall formed around the base so as to surround the carriage are provided with respect to one peripheral portion of the magnetic disc and the spindle motor, and a shroud is provided with respect to an other peripheral portion of the magnetic disc and the spindle motor and surrounds the magnetic disc so as to define a gap between the shroud and an outer peripheral end surface of the magnetic disc which is greater than 0.1 mm but not greater than 0.6 mm.
A magnetic disc unit comprising:
- at least one rotating magnetic disc;
- a head for recording and reproducing data to and from the magnetic disc;
- a head support mechanism for supporting said head;
- a carriage including a guide arm linked to said magnetic head support mechanism;
- and
- a shroud surrounding an end surface of an outer radial periphery of said magnetic disc other than at a part where said guide arm is inserted;
- wherein a gap between said end surface of the outer periphery of said magnetic disc and said shroud is set in a range not less than 0.1 mm but not greater than 0.6 mm;
- and
- wherein a side wall delimits the entire periphery of the disc unit, the side wall forms at least a part of a surrounding wall of the carriag and a part of the shroud, and an inner wall of the shroud is arranged along the periphery of the disc and an outer wall of the shroud serves as a part of the side wall.
Dependencies are inferred from the claim text.