Abstract: An electric toothbrush replacement head device is provided, including a brush head portion, which is provided with a toothbrush handle and a toothbrush head. A rotating cover is disposed adjacent to an end of the brush head portion. A vibration assembly is disposed in the rotating cover, and includes a first fixed plate, a size of which corresponds to an inner diameter of the rotating cover. The first fixed plate is provided with a space-keeping slot therein, a square shaft thereof, and a connecting seat thereon. An end of the square shaft is connected to the brush head potion through the space-keeping slot. An opposite end of the square shaft is connected to the connecting seat. The device is designed with a simple structure, which is flexible for installation and disassembly, and more convenient for use, furthermore, improves transmission efficiency and possesses various functions.

Abstract: A dual-purpose electric toothbrush head is provided and includes a toothbrush handle and a toothbrush head. The toothbrush head includes toothbrush bristles, and a nozzle and a water trough are disposed in the toothbrush head. The nozzle is connected to the water trough, and the toothbrush handle has a water inlet chamber. A water inlet hole is provided between the water inlet chamber and the water trough. A tail plug is provided on a toothbrush head tail end. The dual-purpose electric toothbrush head can not only clean teeth, but also rinse diastema and oral cavity to ensure oral hygiene. The dual-purpose electric toothbrush has diverse functions, and is stable and convenient to use, safe and reliable.