Electric toothbrush deviated rod sound wave machine

The utility model provides an eccentric rod sound wave machine of an electric toothbrush. An eccentric rod sound wave machine body is arranged in a machine body; wherein the eccentric rod sound wave machine body comprises a group of involution type shells; a micromotor is arranged at the end, away from the toothbrush handle, of the involution type shell, a motor shaft is arranged at the output endof the micromotor and points to the toothbrush handle, and the motor shaft is connected with one end of a positioning connecting shaft rod through an eccentric bearing seat; a positioning connectingshaft seat is arranged at the other end of the positioning connecting shaft rod, and a positioning connecting shaft seat soft rubber sleeve is arranged on the outer ring of the positioning connectingshaft seat; a concentric bearing seat, a bearing B and a metal shaft are sequentially arranged in the concentric bearing seat soft rubber sleeve from outside to inside; one end, away from the toothbrush handle, of the metal sha