| 摘要 |
A fountain toothbrush including an elongated tubular housing with a tubular insert held captive therein for receiving toothpaste with a brush head attached to the discharge end thereof and a mechanism associated with the opposite end for causing the toothpaste to be discharged upon rotation of an operating knob with the structure of the insert including a barrier to passage of moisture from the toothpaste to the atmosphere and a barrier to passage of air or oxygen from the atmosphere to the toothpaste thereby maintaining the toothpaste in a hygienic condition with the viscosity thereof also being maintained at a desired level for optimum discharge characteristics of the toothpaste to the bristles on the brush head.
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