Apparatus for rotating disk with improved anti-slip torque

An apparatus for rotating a disc, the apparatus comprising:

• a rotation shaft;
• a turn table coupled to the rotation shaft and having a felt that makes contact with the disc;
• a center guide member inserted into the rotation shaft and coupled to an inner face of the disc;
• a clamp magnet configured to attract a clamp unit that is faced with the turn table and makes contact with an upper face of the disc toward the felt;
• and
• an elastic member interposed between the turn table and the center guide member, the elastic member configured to elastically support the center guide member in an axial direction of the rotation shaft,
• wherein an anti-slip torque that is applied to the upper face of the disc by using the clamp unit and the elastic member is stronger than a rotation torque that is generated by the turn table to inhibit slipping of the disc from the turn table, a force that pushes the center guide member to an axial direction of the rotation shaft from the elastic member is in the range of about 150 gf to about 170 gf, a force of the clamp unit that presses the disc is in the range of about 450 gf˜550 gf;
• wherein a doughnut-shaped groove is formed at a lower face opposite to an upper face of the turn table, and
• wherein at least one automatic balancing ball is disposed in the groove.