Abstract: The present invention discloses an electric toothbrush connecting member and an electric toothbrush. The electric toothbrush connecting member includes a connecting member body and an elastic member. The connecting member body includes an anti-release fastening position. The outer wall of the connecting member body surrounds a recess and is provided with a mounting groove adapted to the elastic member. The elastic member is sleeved on the mounting groove. The anti-release fastening position protrudes and is arranged on the surface of one side of the mounting groove. In the present invention, the outer wall of the connecting member body is sleeved with the elastic member thereon. The anti-release fastening position is arranged to fix the elastic member in place. The elastic member is additionally arranged.

Abstract: The present invention provides a replacement brush head, comprising: a bristle head, a housing, a transmission shaft and a tail cover, the transmission shaft is arranged inside the housing, and the bristle head is arranged in a transmission manner at a top end of the housing through the transmission shaft, and the tail cover is arranged at a tail end of the housing. The replacement brush head and oral hygiene device provided by the present invention converts a linear motion of the transmission shaft device into a rotary motion, effectively controlling the rotation angle and swing frequency of the brush head, realizing the smooth transmission of the brush head, and also reducing the noise caused by the transmission process and has the technical effect of convenient, fast and low-cost assembly.