| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving member utilized for a transporting vehicle requiring both a certain torque and number of revolution and a driving device and a driving member similarly used in the transporting vehicles such as bicycles, light weight vehicles and wheel chairs required to be driven by a human while performing a fast running under a light weight and slow driving operation in order to overcome some defaults as found in the prior art speed-down device using only gears under a lever to cause its number of revolution to be inferior and transmitted low in an inverse proportion. ! SOLUTION: This invention provides a speed-up driving device capable of assuring such number of revolution and torque as those for being converted into a speed of vehicle that is a final object of the driving force while a helical screw and a gear at a connecting part are integrally made to attain the same torque and the same number of revolution to cause a force to be transmitted without becoming a reverse propo |
