PROBLEM TO BE SOLVED: To provide a mechanism to reduce fatigue of feet, muscle power of which is required to rotate a pedal crank, in conventional circular gear and crank, continuously with no variation in intensity during constant rotation to make the feet tired due to no variation in diameter.SOLUTION: A set of circular gear and crank may cause variation in muscle power required to rotate a foot pedal and a crank 3. Accordingly, a set of elliptical gear and crank 2 is used instead of the conventional set of circular gear and crank to reduce a diameter of the gear to 1/3 twice in one rotation so that the foot muscle power required to rotate the gear will be also reduced to 1/3 twice in one rotation.SELECTED DRAWING: Figure 2
【課題】従来の自転車の円形ギア、クランクはペダルクランクを漕ぐ場合、脚の踏む筋力はギア、クランクが円形のため常時回転しても直径が変らず強弱なしに絶え間なく続き疲れてしまう。その疲れを軽減する機構を提供する。【解決手段】円形ギア、クランクは脚踏みのペダル、クランク3への筋力にも強弱の変化を及ぼす。そこで従来の円形ギア、クランクを楕円形ギア、クランク2に変えれば直径は一回転毎に2回1/3に短くなり、踏む脚の筋力も一回転毎に2回ずつ1/3に軽減される。【選択図】図2
ELLIPTICAL GEAR AND CRANK OF BICYCLE
自転車の楕円形ギア、クランク
2016-03-07
Patent
Elektronische Ressource
Japanisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |