Movable ring type electro-acoustic converter

The utility model discloses a movable ring type electro-acoustic converter which comprises a vibrating system, a magnetic circuit system and a shell, wherein the vibrating system comprises a diaphragm and a voice coil; the magnetic circuit system comprises a washer, a magnet and a pan bracket which are combined with one another from top to bottom; the shell is correspondingly fixedly provided with the magnetic circuit system and the vibrating system of each magnetic circuit unit, and the bottom of the shell is closed to form into an outer frame of the movable ring type electro-acoustic converter; the inner side walls of the diaphragm and the shell, the bottom of the shell and the magnetic circuit system jointly form into an inner acoustic cavity of the movable ring type electro-acoustic converter by enclosure; and an active carbon is arranged on the inner wall of the shell which forms into the acoustic cavity. Due to the design, the defects of the existing structure can be improved, and the low-frequency performance of the movable ring type electro-acoustic converter can be enhanced.