| 摘要 |
An electric toothbrush is provided. The electric toothbrush has an elongate body having a handle, a head, and a neck extending between the handle and the head. The body has an interior chamber with a motor. A shaft is operatively connected to the motor. A first movable bristle carrier is disposed on the head. The shaft is operatively connected to the first bristle carrier to impart motion thereto. The first bristle carrier has a first composite tuft formed from a plurality of closely spaced bristle tufts and a plurality of second bristle tufts. The second tufts have a height that is greater than a height of the first composite tuft. The bristles of the first composite tuft having free ends and the bristles of the second tufts having free ends. The total surface area of the bristles of the first composite tuft is greater than the total surface area of the bristles of the second tufts, and the plurality of second tufts are disposed adjacent a portion of a perimeter of the composite tuft to form a first recessed region.
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