Patent ID: 8278786

Claim:
A linear vibrator, comprising: a base; a coil unit coupled to the base; a magnet assembly configured to form a closed circuit of a magnetic force perpendicular to an electric current flowing through the coil unit, the magnet assembly relatively moving with respect to the coil unit, the magnet assembly including a center magnet and a side magnet, the side magnet being positioned on both sides of the coil unit and disposed in a direction toward both sides of the coil unit from a center of the center magnet such that a flux density of a magnetic force line passing through an outer surface of the coil unit from the center of the center magnet is increased; and an elastic member elastically supporting the magnet assembly, wherein: the elastic member is a plurality of spiral-shaped leaf springs being interposed between the magnet assembly and the base, the plurality of spiral-shaped leaf springs being deformed in a same direction, each of the spiral-shaped leaf springs comprises: a first frame; a plurality of plate-shaped members having one end part thereof extended spirally toward an inner side of the first frame; and a second frame coupled to the other end part of the plurality of plate-shaped members, and the plurality of spiral-shaped leaf springs face one another and are coupled to one another about the second frame.