| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly durable multiplex fitted telescopic shaft using highly strong transmission shafts. SOLUTION: The rotation of the first transmission shaft is transmitted to the second transmission shaft via a first engaging part engaging a first engaged part of the first transmission shaft, and the rotation of the second transmission shaft is transmitted to the third transmission shaft via a second engaging part engaging a second engaged part of the second transmission shaft. A first male screw of the first transmission shaft is screw-fitted to a first nut part of a first movable pipe, a second male screw of the second transmission shaft is screw-fitted to a second nut part of a second movable pipe, and a third male screw of the third transmission shaft is screw-fitted to a third nut part of a third movable pipe. The rotation of the first transmission shaft is transmitted to the second transmission shaft and the third transmission shaft, and the first, second and third movable pipes are moved in the axial direction. COPYRIGHT: (C)2009,JPO&INPIT
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