| 摘要 |
The present invention relates to an internally accommodated three-stage speed change mechanism and an internally accommodated five-stage speed mechanism applicable to a bicycle, in which inside a hub body incorporating a portion of a speed change mechanism a first planetary gear mechanism is accommodated and a first speed changing rod is provided for controlling the first planetary gear mechanism, the ring gear of which is slidably moved by first the speed changing rod and the planetary gear of which remains axially fixed regardless of the first speed change rod.
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