Speaker system with moving voice coil

A speaker system with a moving voice coil, sequentially comprising a front cover, a vibrating component and a magnetic circuit component from top to bottom, wherein

• the front cover is provided with a conductive material layer which constitutes a fixed electrode plate;
• the vibrating component comprises a vibrating diaphragm and a voice coil secured to the lower surface of the vibrating diaphragm and disposed in a magnetic gap formed by the magnetic circuit component;
• the vibrating component further comprises a flexible circuit board secured to one side of the vibrating diaphragm, wherein a metal layer is disposed in the middle of the flexible circuit board and constitutes a movable electrode plate;
• a front cover solder pad is disposed on the front cover;
• an external terminal is disposed on the front cover solder pad;
• the fixed electrode plate is electrically connected to an external circuit by means of the external terminal;
• the flexible circuit board extends to the outside of the speaker system and is provided with a solder pad electrically connected to the external circuit;
• the fixed electrode plate and the movable electrode plate are opposite to each other;
• charges accumulate on the fixed electrode plate and the movable electrode to constitute a capacitor after the front cover and the flexible circuit board are electrified;
• a capacitance monitoring chip is further disposed in the speaker system with the moving voice coil and is electrically connected to the capacitor;
• the flexible circuit board is secured between the vibrating diaphragm and the voice coil;
• and
• the vibrating component further comprises a vibrating diaphragm reinforcing portion secured to the upper surface of the vibrating diaphragm;
• a hole is formed in the center of each of the vibrating diaphragm and the vibrating diaphragm reinforcing portion;
• and the capacitance monitoring chip is disposed in the hole.