| 摘要 |
The present invention is directed to a toothbrush drive shaft having a shaft shank mounting a force transmission piece, in particular an eccentric crank piece, in a manner preventing relative rotation. Furthermore, the present invention relates to a method of manufacturing such a drive shaft, whereby the force transmission piece and the shaft shank are separately produced and subsequently joined together. According to the invention, the force transmission piece is bent from a wire having a section thereof bent to form a helical wound body and to be pushed onto the shaft shank so it wraps around the shaft shank and sits thereon in a manner preventing relative rotation.
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