Patent attributes
A brush head for performing reciprocating rotation comprises a driving wheel and a housing on which a top hole and/or a central through hole are/is distributed in a centering manner. The center line(s) of the holes and a rotation axis (L1) of a driving shaft are located at a same line, and the driving shaft penetrates through the central through hole. The fitted region of the driving shaft and the driving wheel enters the through holes distributed on the driving wheel to link the driving shaft and the driving wheel fixedly. A driven part matching a driving part is distributed on a protrusion of the brush disc on which a hollow region is formed. The driving shaft penetrates through or enters the hollow region and limits the brush disc to move. The brush disc is incapable of performing reciprocating rotation when the driving shaft is not installed or is damaged.
