Magnetic disk device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorJunichiro Morioka
Life of this patent
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Abstract
A magnetic disk device having a cover of a simple structure having high rigidity and not easily deformable by pressure from the outside. An envelop surface configuration (46) of at least a portion of a cover (40) positioned opposite a magnetic disk (2, 43) is made generally conical, such that the distance from the magnetic disk decreases along a direction from the vicinity of a rotating shaft of a motor, as the center, toward the outer periphery of the magnetic disk, thereby reducing the amount of deformation of the cover, particularly in the vicinity of the rotating shaft of the motor.
Claims14
A magnetic disk device comprising
- a magnetic disk,
- a motor (4) for rotating the magnetic disk through its rotating shaft (12),
- a head for writing data to the magnetic disk or reading out data from the magnetic disk,
- an arm on which the head is supported,
- an actuator (3) connected to the arm to move the head generally in a radial direction across the magnetic disk,
- a base (1) on which the magnetic disk, the motor (4) and the actuator (3) are supported and accommodated, and
- a cover (40) for enclosing the entire device in association with the base (1), said cover comprising a dome comprising concentric steps, the center of the dome being concentric with rotating shaft (12),
- wherein the cover (40) is placed opposite to the magnetic disk and is formed so that the gap between the inner surface of the cover (40) and the magnetic disk is reduced along a direction from the rotating shaft portion of the motor (4) toward the outer periphery of the magnetic disk.
A magnetic disk device comprising
- a magnetic disk,
- a motor (4) for rotating the magnetic disk through its rotating shaft (12),
- a head for writing data to the magnetic disk or reading out data from the magnetic disk,
- an arm on which the head is supported,
- an actuator (3) connected to the arm to move the head generally in a radial direction across the magnetic disk,
- a base (1) on which the magnetic disk, the motor (4) and the actuator (3) are supported and accommodated, and a cover (40) for enclosing the entire device in association with the base (1),
- wherein the cover (40) is opposite the magnetic disk and has a circular stepped dome shape, having a plurality of steps, the center of the dome being concentric with rotating shaft (12), such that the gap between the inner surface of the cover (40) and the magnetic disk decreases in width along a direction from the rotating shaft portion of the motor (4) toward the outer periphery of the magnetic disk.
A magnetic disk device comprising
- a magnetic disk,
- a motor (4) for rotating the magnetic disk through its rotating shaft (12),
- a head for writing data to the magnetic disk or reading out data from the magnetic disk,
- an arm on which the head is supported,
- an actuator (3) connected to the arm to move the head generally in a radial direction across the magnetic disk,
- a base (1) on which the magnetic disk, the motor (4) and the actuator (3) are supported and accommodated, and a cover (40) for enclosing the entire device in association with the base (1),
- wherein the cover (40) is opposite the magnetic disk and has a conical shape having a plurality of steps, the center of the conical shape being concentric with rotating shaft (12), such that the gap between the inner surface of the cover (40) and the magnetic disk decreases in width along a direction from the rotating shaft portion of the motor (4) toward the outer periphery of the magnetic disk.
Dependencies are inferred from the claim text.