| 摘要 |
PROBLEM TO BE SOLVED: To provide a toothbrush with exchangeable leading edge end to solve such a problem that deteriorated toothbrush is dumped as a whole although its handle is not worn. SOLUTION: A component of bristled toothbrush with a spiral base thread groove set on from the bottom face side of the base upward to the flat face side is made, while a spiral thread groove is set inside an annulus at the end side of the handle, and the toothbrush component is screwed thereinto to form a toothbrush with exchangeable leading edge. Material saving without wasting materials can be achieved because the handle needs not to be dumped. COPYRIGHT: (C)2006,JPO&NCIPI
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