| CPC B06B 1/045 (2013.01) [H02K 1/02 (2013.01); H02K 1/34 (2013.01); H02K 33/02 (2013.01)] | 18 Claims |
|
1. An actuator of an electronic device, the actuator comprising:
a stator comprising a bracket, a yoke positioned on the bracket, and a coil surrounding a circumference of the yoke;
a vibrator comprising a permanent magnet surrounding a circumference of the coil, a weight surrounding a circumference of the permanent magnet, and a plate supporting the permanent magnet and the weight;
an elastic member positioned between the bracket and the vibrator and configured to support the vibrator; and
a magnet fluid coated over the vibrator to provide damping stability during vibration of the vibrator,
wherein, in the magnet fluid, an element ratio of magnetic powder to the magnet fluid is between 1.76% and 1.8%, and
wherein a weight of the magnet fluid is between 0.24% and 0.71% of a weight of the vibrator.
|