The toothbrush head may include a brush portion having a hair thereon, a handle portion extending from the brush portion, and a connecting member which can be mounted inside the handle portion.The coupling member may include a body having an opening for receiving the drive shaft of the electric toothbrush handle portion into the connection member, and a handle portion connecting portion extending from the body and having an opening in the wall for receiving the drive shaft.The wall comprises at least two longitudinal slits and an elastic wall between the two slits, and the elastic wall may be engaged with the drive shaft when the drive shaft is inserted into the coupling member.At least a portion of the body of the coupling member and at least a portion of the handle may each have a conical shape to achieve coupling.Diagram
