18435302. MAGNETIC DISK DEVICE (KABUSHIKI KAISHA TOSHIBA)
MAGNETIC DISK DEVICE
Organization Name
Inventor(s)
Tomoki Yaguchi of Kawasaki Kanagawa JP
MAGNETIC DISK DEVICE
This abstract first appeared for US patent application 18435302 titled 'MAGNETIC DISK DEVICE
Original Abstract Submitted
A magnetic disk device according to one embodiment includes a base, five or more magnetic disks in the base, a head actuator, and a spindle motor. The base has a bottom wall having a second thickness and a side wall. The spindle motor includes a sleeve with a first hole, fixed to the bottom wall, a shaft inserted in the first hole rotatably, and a hub rotatable integrally with the shaft. The hub includes a first part, a second part extending from a lowermost surface of the first part in a first direction being from the magnetic disks toward the bottom wall, and a third part having a first thickness and extending from a lowermost surface of the second part in a second direction orthogonal to the first direction. A value obtained by dividing the second thickness by the first thickness is greater than or equal to 1.89.