A swing drive mechanism, including: a vibrating mechanism, a motor driving the vibrating mechanism, and a transmission mechanism. The transmission mechanism is connected between the vibrating mechanism and the motor. The vibrating mechanism is provided with a grating and a photocoupler that detects the position of the vibrating mechanism. The photocoupler is electrically or electronically connected to a micro-control processor. The micro-control processor controls the photocoupler to detect the grating and adjusts the rotation speed of the motor. The micro-control processor is electrically or electronically connected to an accelerometer.