| 摘要 |
A hand powered rotary toothbrush comprises a spring loaded toothed lever which engages with a toothed wheel. The wheel is part of a gearing system connected to a belt which drives the rotating brushes in the brush head. The brush head may contain more than one rotating brush, two or more counter rotating brushes, or a combination of rotating and static units, or brushing and polishing pads, both of varying shapes and sizes. The brushing units may contain nylon bristles surrounded by a ring of silicone rubber nodes suspended over a cavity. This arrangement allows the cleaning units to mould to the contours of the teeth greatly increasing the contact surface area. The brush units may be removable and fixed to a standard handle. The toothbrush could have the option of low friction bearings, axle ends or gear surfaces. The lever may be locked in a closed position and the device used as a non-rotary toothbrush. |
