| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a gear change by changing a speed by two gears, by forming the gears into a simple structure for easily, smoothly and efficiently changing the gears when shifting the gears. SOLUTION: Instead of a plurality of conventional gears, an oblique part 1-2 is made, and the vertically moving gear 2 vertically moves by contacting with this part, to change the gear ratio. COPYRIGHT: (C)2006,JPO&NCIPI
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