| 摘要 |
PROBLEM TO BE SOLVED: To provide a toothbrush having an enhanced tooth-cleaning effect. SOLUTION: This toothbrush has a rotation brush which is supported rotatably through a spindle, which is perpendicular to the longitudinal direction of its handle, on the top of the handle. The handle comprises a roughly straight grip part and a fine mouth-inserting part which is between the grip part and the rotation brush and is separated from the extended center line of the grip part in a smooth circular arc manner. The spindle of the rotation brush is roughly located on the extended center line of the grip part. The primary string of the rotation brush is an ultrafine one having a diameter of 0.076-0.15 mm. COPYRIGHT: (C)2004,JPO
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