The invention discloses a miniature low-frequency vibrator capable of being directly driven by an
audio signal, which belongs to the technical field of vibrators and comprises a base, an upper cover,a side cover, a flexible circuit board, a coil, a
magnet, a balancing weight, elastic pieces, an inner
welding sheet, an outer
welding sheet, an insulating
adhesive tape and a buffer body. According to the invention, the
magnet and the coil adopt a double-drive structure of which the upper surface and the lower surface are symmetrical, so that components of electromagnetic force in the non-vibration direction are mutually counteracted, and vibration
noise is eliminated. The elastic piece adopts a V-shaped structure, so that the
effective length of a deformation area is increased, and the
response frequency can be lower. The two V-shaped elastic pieces are distributed in a
central symmetry manner, so that the operation is more stable. The buffer body is used for preventing the elastic pieces from bearing large
impact force and being damaged when the circuit
voltage is too high, and the service life is prolonged.