Disk chucking apparatus and disk drive having the same

A disk chucking apparatus, comprising:

• a chuck base having a plurality of holding portions;
• a plurality of chuck pins being inserted in the holding portions to be elastically supported and protruding outwards from the chuck base;
• and
• an elastic fragment arranged symmetrically to the chuck pin about the rotational center of the chuck base and elastically supporting a disk together with the chuck pin,
• wherein the elastic fragment has an inclined surface inclined with respect to a direction of mounting the disk, and the radius of the inclined surface is increased from a radius smaller than an inner radius of the disk to a radius larger than the inner radius of the disk.

A disk chucking apparatus, comprising:

• a chuck base having a plurality of holding portions;
• a plurality of chuck pins being inserted in the holding portions to be elastically supported such that the chuck pins can protrude outwards from the chuck base;
• and
• an elastic fragment arranged symmetrically to the chuck pin about the rotational center of the chuck base and elastically supporting a disk together with the chuck pin,
• wherein the elastic fragment is formed by a pair of cutting portions and an elastic hole is formed at an end of the cutting portion.

A disk chucking apparatus, comprising:

• a chuck base having a plurality of holding portions and a center hole being a rotational center;
• a plurality of chuck pins being inserted in the holding portions to be elastically supported and protruding outwards from the chuck base;
• and
• an elastic fragment arranged symmetrically to the chuck pin about the center of the center hole and elastically supporting a disk with the chuck pin,
• wherein a rotor holder of a motor is press-fitted into the center hole along a whole length-direction of the center hole, and a securing groove is formed on the inner perimeter of the center hole.