Spindle motor
A spindle motor is provided, the motor including a bearing assembly including an upper surface-opened cylindrical bearing housing and a bearing accommodated in the bearing housing and formed with a rotation shaft hole; a stator including a core coupled to a periphery of the bearing housing and a coil wound on the core; a rotation shaft inserted into the rotation shaft hole; a rotor including a disk-shaped yoke coupled to the rotation shaft and a magnet coupled to the yoke to face the core; and a suction magnet arranged at the yoke facing the core, wherein the bearing housing includes a body coupled to the core and a core fixture bent from the body to face the core, and the suction magnet is so arranged as to face the core fixture corresponding to an external side of a bent unit bent from the body for forming the core fixture.
1. A spindle motor, comprising:
a bearing assembly including an upper surface-opened cylindrical bearing housing, a bearing accommodated in the bearing housing, and a rotation shaft hole formed in the bearing;
a stator including a core coupled to a periphery of the bearing housing and a coil wound on the core;
a rotation shaft inserted into the rotation shaft hole;
a rotor including a disk-shaped yoke coupled to the rotation shaft and a magnet coupled to the yoke to face the core; and
a suction magnet arranged at the yoke facing the core;
wherein the bearing housing includes a body coupled to the core and a core fixture bent to a direction facing an outside of the body to face the core,
wherein the core fixture includes a first portion vertically bent from the body, a second portion vertically bent from the first portion, and a ring-shaped sill formed at an upper surface of the first portion of the core fixture adjacent to the second portion of the core fixture; and
wherein the suction magnet faces the first portion of the core fixture.
2. The spindle motor of claim 1 , wherein a ring-shaped trench unit is formed in the bottom surface of the core fixture.
3. The spindle motor of claim 1 , wherein a bent portion is formed between the body and the first portion of the core fixture and is formed with a curvature.
4. A spindle motor, comprising:
a bearing assembly, a stator, a rotor, and a suction magnet;
wherein the bearing assembly includes
an upper surface-opened cylindrical bearing housing including a body coupled to a core and a core fixture bent to a direction facing an outside of the body to face the core, a bearing accommodated in the bearing housing, and a rotation shaft hole formed in the bearing; and
wherein the core fixture includes a first portion vertically bent from the body, a second portion vertically bent from the first portion, and a ring-shaped sill formed at an upper surface of the first portion of the core fixture adjacent to the second portion of the core fixture.
5. The spindle motor of claim 4 , wherein the rotor includes a rotation shaft inserted into the rotation shaft hole, a disk-shaped yoke coupled to the rotation shaft and a magnet coupled to the yoke to face the core.
6. The spindle motor of claim 5 , wherein the suction magnet is arranged at the yoke facing the core.
7. The spindle motor of claim 6 , wherein the suction magnet is arranged at a position facing the core fixture.
8. The spindle motor of claim 7 , wherein the stator includes a core coupled to a periphery of the bearing housing and a coil wound on the core.
9. The spindle motor of claim 4 , wherein a ring-shaped trench unit is formed in the bottom surface of the core fixture.
10. The spindle motor of claim 9 , wherein a bent unit is formed at a portion in which the first portion of the core fixture is bent from the body, and is formed with a curvature having a predetermined radius of curvature.