Nidec Corporation

Yuki Tajima

Hironori Ando

Kazuhiro Sato

Masahiro Shiraishi

Katsuya Takahashi

Yuya Saito

Yoshitsugu Sasaguri

Seiji Maruoka

Takahiro Hisada

{circle around (1)} A spindle motor includes a fixing portion defined by a bearing portion, a holder portion, a gap between the bearing portion and the holder portion, and an adhesive arranged in the gap. {circle around (2)} The fixing portion includes first and second protruding surfaces arranged to protrude radially from a first and a second one, respectively, of an outside surface of the bearing portion and an inside surface of the holder portion; and first and second boundary surfaces arranged to join the first and second surfaces, respectively, to the first and second protruding surfaces, respectively. {circle around (3)} At least a portion of the first boundary surface is arranged above the second boundary surface. {circle around (4)} The first and second protruding surfaces are arranged radially opposite to the second and first surfaces, respectively, with a first and a second gap, respectively, intervening therebetween. {circle around (5)} The first boundary surface is arranged opposite to the second boundary surface with a third gap intervening therebetween. {circle around (6)} The adhesive is arranged to extend from the third gap to at least a portion of each of the first and second gaps.

Spindle motor and disk drive apparatus

A spindle motor includes a recording disk and a clamper. A cylindrical portion includes a first screw portion positioned in an outer circumferential portion of the cylindrical portion. The clamper includes an annular raised portion configured to be fitted in a through hole of the recording disk. An inner circumferential portion of the clamper includes a second screw portion configured to be screwed to the first screw portion. At least a portion of the second screw portion is positioned in an inner circumferential portion of the annular raised portion. Each of the first screw portion and the second screw portion includes at least one of a screw groove and a screw thread. An axial position of at least a portion of the second screw portion overlaps with an axial position of the recording disk.

Growing community of inventors

Kyoto, Japan

Yuki Tajima