| 摘要 |
A toothbrush comprises a toothbrushing part having a head provided with a plurality of bristles and a passage extending to the bristles, a toothpaste container part connected with the toothbrushing part and adapted to contain a quantity of toothpaste, piston means arranged to press the paste from the toothpaste container part into the toothbrushing part, and valve means arranged in the head of the toothbrushing part movably so that when the piston means press out the toothpaste from the toothpaste container part into the toothbrushing part the valve means is displaced in the passage toward an outer surface of the bristles so as to apply the toothpaste onto the outer surface of the bristles, while when the piston means is retracted and a negative pressure is produced in the toothbrushing part the valve means is withdrawn from the outer surfaces of the bristles so as not to hinder brushing of teeth by the outer surface of the bristles.
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