Samsung Electro-mechanics Co., Ltd.

Kwan Soo Yun

Song Bon Oh

Ta Kyoung Lee

Shin Young Cheong

Kum Kyung Lee

There are provided a spindle motor and a hard disk drive including the same. The spindle motor includes a shaft fixedly installed on a base member and including an upper thrust member, a sleeve rotatably supported by the shaft, a hub extended from the sleeve in an outer diameter direction, and a sealing cap mounted on the hub, wherein the upper thrust member and the sleeve or the hub include a liquid-vapor interface formed therebetween, wherein a gap between facing surfaces of the sealing cap and the upper thrust member in the axial direction is narrow enough to form a labyrinth seal, and wherein the sealing cap includes a curved part curved so that a gap between the sealing cap and the upper thrust member at a portion of the sealing cap facing the upper thrust member in the axial direction is varied in a radial direction.

Spindle motor having sealing cap with curved part and hard disk drive including the same

There is provided a spindle motor, including: a shaft having a fixing groove formed in a lower portion thereof; a lower thrust member including a fixing part inserted into the fixing groove, a disk part extending from the fixing part in an outer radial direction, and an extension part extending from the disk part in an axial direction; a base member coupled to the extension part; a rotating member forming a bearing clearance with the shaft and rotatably provided with respect to the shaft; a first sealing part provided between an upper surface of the extension part and the rotating member; and a second sealing part provided between an inner circumferential surface of the base member and an outer circumferential surface of the rotating member.

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Suwon, South Korea

Kwan Soo Yun