| 摘要 |
An electrically powered toothbrush with an eliptical brushing motion comprising a motor-operated rotating output drive and a disk rotatably mounted thereon, said disk having at least one eccentric funnel-shaped orifice which serves as an end bearing for a flexible direct drive shaft, a direct output shaft having one end bearing on said funnel-shaped orifice and the opposite end constructed as a holder for a brush, a second bearing for said shaft being located at a point between the two shaft ends, said output shaft having rigidity in one plane of the axis of rotation and flexibility in a perpendicular plane whereby an eliptical brush rotation is achieved as a result of tooth counterpressure again the brush, and a housing. |
