Moving-iron type low frequency acoustical generator

The utility model discloses a moving-iron type low frequency acoustical generator comprising a frame, a support chip, a gasket, a mass sheet, a magnetic cup, a sound film, a front cover, magnetic steel, a clamping plate, a printed board, a voice coil and a rear cover. The low frequency acoustical generator is characterized in that the magnetic cup, the magnetic steel and the clamping plate form a constant magnetic circuit system; the constant magnetic circuit system and the support chip form a vibratory magnetic circuit system; the support chip with the structural form of an insert is integrally formed with the frame by injection molding; the gasket is arranged between the mass sheet and the support chip; the edge of the sound film is fixed on the frame and the center of the sound film is connected with the vibratory magnetic circuit system; the front cover is arranged outside the sound film; the magnetic cup and the clamping plate form a magnetic gap; the printed board is fixed on the frame; and one end of t