| 摘要 |
An electric toothbrush includes a brush head that has a plurality of tooth engaging elements, such as bristles and polishers optionally arranged in alternating rows on the brush head. The brush head is mounted at the distal end of an elongate driven shaft connected through a universal joint to the drive shaft of a drive means typically located in the handle or body portion of the toothbrush so that the driven shaft is at a shallow angle to the line of the drive shaft. The driveable toothbrush attachment and the handle or body portion are separable modular units. A guard is mounted by and extends beyond the housing around the driven shaft and is located around part of one side of the brush head and along the length of the brush head so as to shield soft tissues of a user's mouth except from the exposed bristles of the brush head. The brush head is operable to slowly rotate (at say, between 60 and 240 rpm), about an axis substantially corresponding to the longitudinal axis of the drive shaft. |
