主权项 |
1. An electric rotary toothbrush, comprising:
a housing; an electric motor located within the housing, the electric motor includes a power rod, wherein the electric motor drives the power rod to provide a rotational force; a shaft portion extending vertically from the housing, the shaft having a first end and a second end, the second end is removably mounted on the housing, wherein the first end comprises a curved tubular neck portion that tapers to a curved edge; a rotary brush head rotatably mounted on the first end of the shaft, wherein the rotary brush head comprises a pinion and an annular ring having bristles extending radially around a periphery of the annular ring; wherein the pinion is operably connected to the power rod to deliver the rotational force from the power shaft to the annular ring. |