| 摘要 |
An electric toothbrush comprises a handle having an electric motor, a head, a rotating shaft, and a neck extending between the handle and the head. The head has a first and second bristle holders, each having a plurality of bristles, wherein the second bristle holder is located between the handle and the first bristle holder. The second bristle holder is movably mounted on the head with a laterally extending pivot member. The rotating shaft is operatively connected to the first and second bristle holders to cause a first movement of the first bristle holder and to move the second bristle holder in a rocking motion about the pivot member.
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