| 摘要 |
The bristle arrangement includes a first brush portion (14) which has a first set of bristles, the first brush portion (14) being arranged in an annular configuration, and remains stationary in operation of the appliance. The bristle arrangement also includes a second brush portion (16) which has a second set of bristles, wherein the second brush portion (16) oscillates at a selected frequency. The second set of bristles has a circular arrangement, fitting within the opening of the annular arrangement of the first set of bristles. The first and second sets of bristles have a diameter within the range of 3 mils to 5 mils, and a length in the range of 0.3 to 0.425 inches. The first bristle set includes 40 to 100 bristle tufts and the second bristle set includes 40 to 120 bristle tufts, which are substantially evenly spread, respectively.
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