SPINDLE MOTOR AND HARD DISK DRIVE INCLUDING THE SAME

摘要

There is provided a spindle motor including, a lower thrust member including an extension part protruding upwardly; a shaft fixed to the lower thrust member; an upper thrust member extended from an upper end portion of the shaft; and a rotating member disposed above the lower thrust member and rotatably installed on the shaft, wherein an outer surface of the upper thrust member and an inner surface of the rotating member have a first sealing part formed therebetween, the first sealing part having a first liquid-vapor interface formed therein, an inner surface of the extension part of the lower thrust member and an outer surface of the rotating member have a second sealing part formed therebetween, the second sealing part having a second liquid-vapor interface formed therein, and the rotating member includes a communication hole formed therein so as to connect the first and second sealing parts to each other.

主权项

1. A spindle motor comprising:
a lower thrust member fixed to a base member and including an extension part protruding upwardly in an axial direction; a shaft fixed to the lower thrust member; an upper thrust member extended from an upper end portion of the shaft in a radial direction; and a rotating member disposed above the lower thrust member and rotatably installed on the shaft, wherein an outer surface of the upper thrust member and an inner surface of the rotating member have a first sealing part formed therebetween in the radial direction, the first sealing part having a first liquid-vapor interface formed therein, an inner surface of the extension part of the lower thrust member and an outer surface of the rotating member have a second sealing part formed therebetween in the radial direction, the second sealing part having a second liquid-vapor interface formed therein, and the rotating member includes a communication hole formed therein so as to connect the first and second sealing parts to each other.