Patent ID: 8120214

Claim:
A linear vibrator with improved damping function, comprising: a casing defining an internal space therein; a bracket made of a magnetic body and coupled to a lower end of the casing, with a coil provided on the bracket to guide a magnetic field when a current is applied to the coil; a vibration unit, comprising a yoke having a hollow space therein, the yoke being closed on one end thereof, a magnet inserted into the hollow space of the yoke, an auxiliary magnet generating magnetic force with respect to the bracket and provided in a lower end of the weight, for preventing the vibration unit from undesirably finely vibrating in response to external force, and a weight fitted over an outer surface of the yoke; and a spring member provided in an upper end of the casing to elastically support the vibration unit such that the vibration unit linearly vibrates, wherein a sidewall magnetic fluid is interposed between the auxiliary magnet and the casing preventing the vibration unit from coming into direct contact with the casing due to horizontal movement or rotation of the vibration unit, and a force-fitting depression is formed in the perimeter of the lower end of the weight, and the auxiliary magnet is inserted into the force-fitting depression.