Turn table for spindle motor
A turn table of a spindle motor is provided, wherein an outer diameter of a vertical portion at the disk insertion unit facing an inner periphery of a small-diameter disk is smaller by 0.01% to 0.15% than the inner periphery of the small-diameter disk to enable a chucking of the small-diameter disk having an inner diameter of an inner periphery smaller than 15 mm.
1. A turn table of spindle motor, the turn table comprising:
an axial coupling unit coupled at an inner periphery by a rotation shaft;
a disk insertion unit into which an inner periphery of a disk is inserted, and separated from an outer periphery of the axial coupling unit; and
a claw resiliently pressing the inserted disk by being protruded at the disk insertion unit;
an accommodation unit extensively formed from the outer periphery of the disk insertion unit to accommodate the inserted disk; and
a pad on the accommodation unit,
wherein the disk insertion unit comprises a first portion inclined downwardly from an upper portion of the axial coupling unit, and a second portion integrally bent from the first portion toward the accommodation unit,
wherein the disk insertion unit is integrally formed with the claw,
wherein the claw comprises a first claw portion guiding the inserted disk, and a second claw portion bent from the first claw portion to chuck the disk;
wherein an outer diameter of the second portion of the disk insertion unit is in a range of from 14.94 mm to 14.96 mm;
wherein a height of the second portion of the disk accommodation unit, measured from the pad to a boundary between the first portion and the second portion of the disk accommodation unit, is in a range of from 0.1 mm to 0.6 mm; and
wherein a height of the second claw portion, measured from the pad to a boundary between the first claw portion and the second claw portion is in a range of from 0.2 mm to 0.5 mm.
2. The turn table of claim 1 , wherein a height of the second portion at a disk insertion unit is in a range of from 8% to 50% of thickness of a disk.
3. The turn table of claim 1 , wherein a claw insertion force is less than 80% of a clamping force.
4. The turn table of claim 1 , wherein a height of the second claw portion, measured from the pad to a boundary between the first claw portion and the second claw portion is in a range of from 15% to 42% of a thickness of a disk.
5. The turn table of claim 1 , further comprising a plurality of opening units formed along the disk insertion unit.
6. The turn table of claim 5 , wherein the claw is formed at an opening unit of the plurality of opening units.
7. The turn table of claim 1 , further comprising an annular-shaped recess formed at a bottom surface of the accommodation unit, and a plurality of balls received in the annular-shaped recess.
8. A turn table for spindle motor, the turn table comprising:
an axial coupling unit to which a rotation shaft is coupled;
a disk insertion unit into which a disk is inserted;
an accommodation unit extensively formed from an outer periphery of the disk insertion unit to accommodate the inserted disk;
a pad on the accommodation unit; and
a claw integrally formed at the disk insertion unit for resiliently supporting the inserted disk apart from the disk insertion unit,
wherein the disk insertion unit comprises:
a first portion inclined downwardly from an upper portion of the axial coupling unit to guide the inserted disk, and
a second portion integrally bent from the first portion to the disk accommodation unit to allow an inner periphery of the disk to be brought into contact,
wherein the claw comprises:
a first claw portion guiding the inserted disk, and
a second claw portion bent from the first claw portion to chuck the disk,
wherein an outer diameter of the second portion of the disk insertion unit is in a range of from 14.94 mm to 14.96 mm;
wherein a height of the second portion of the disk accommodation unit, measured from the pad to a boundary between the first portion and the second portion of the disk accommodation unit, is in a range of from 0.1 mm to 0.6 mm;
wherein a height of the second claw portion, measured from the pad to a boundary between the first claw portion and the second claw portion is in a range of from 0.2 mm to 0.5 mm; and
wherein an outer diameter of the claw at a boundary between the first claw portion and the second claw portion is in a range of from 15.17 mm to 15.23 mm.
9. The turn table of claim 8 , wherein a claw insertion force is less than 80% of a clamping force.
10. The turn table of claim 8 , further comprising an annular-shaped recess formed at a bottom surface of the accommodation unit, and a plurality of balls received in the annular-shaped recess.