Spindle motor

• US 20070013239A1
• Filed: 07/13/2006
• Published: 01/18/2007
• Est. Priority Date: 07/16/2005
• Status: Abandoned Application

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Park, Jae Hyun
• Application Number:
  US11/485,306
• Publication Number:
  US 20070013239A1
• Time in Patent Office: Days
• US Class Current: 310/51
• CPC Class Codes: H02K 1/2788 the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
• CPC Class Codes: H02K 5/24 specially adapted for suppression or reduction of noise or vibrations

Abstract

Provided is a spindle motor. The spindle motor includes a rotor and a stator. The rotor includes a yoke and a flange formed to protrude from an outer perimeter of the yoke. The stator interacts with the rotor to rotate the rotor.

Claims

1. A spindle motor comprising:

a rotor including a yoke and a flange formed to protrude from an outer perimeter of the yoke; and

a stator that interacts with the rotor, for rotating the rotor.

2. The spindle motor according to claim 1, wherein the flange is formed at a lower end of the yoke.

3. The spindle motor according to claim 1, wherein the flange is formed by bending a lower end of the yoke.

4. The spindle motor according to the claim 1, wherein the flange is integrally formed with the yoke.

5. The spindle motor according to claim 1, wherein the flange has a substantially rectangular cross-sectional shape.

6. A spindle motor comprising:

a rotating shaft;

a yoke rotating together with the rotating shaft;

a flange formed such that a lower end of the yoke protrudes outwardly;

a magnet disposed on the yoke;

coils for interacting with the magnet when power is applied to the coils; and

a core around which the coils are wound.

7. The spindle motor according to claim 6, wherein the yoke has a thickness in a range of 0.9 to 1.2 mm.

8. The spindle motor according to claim 6, wherein the yoke has an inner diameter in a range of 20.8 to 21.0 mm.

9. The spindle motor according to claim 6, wherein the flange has a thickness in a range of 0.7 to 1.2 mm.

10. The spindle motor according to claim 6, wherein the flange has a height in a range of 0.9 to 1.2 mm.

11. The spindle motor according to claim 6, wherein the yoke and the magnet are bonded using an adhesive with a viscosity of 10,000 poise (P =dyn •

s/cm²) or higher.

12. The spindle motor according to claim 6, wherein the yoke and the magnet form a gap therebetween, the gap being filled with an adhesive with a viscosity in a range of 10 to 500 poise.

13. The spindle motor according to claim 6, wherein the flange is substantially perpendicular to a body of the yoke.