| 摘要 |
A chainless front-wheel driving device of a multi-function bicycle is provided to double the driving force by directly driving through interconnecting a ratchet gear and a crank arm by means of a lot bar without a chain and to increase exercise effects on the whole human body, not only the legs. In a multi-function bicycle having a chainless front-wheel driving device, ratchet gears(1, 1') having a tooth form in one direction are connected with crank arms(2, 2') and installed on both ends of a front-wheel lower side(13). L-shaped operating members(6, 6') contacted with operating lever housings(10, 10') are inserted into hinge hooks(7, 7') attached on a main body handle(9). Crank arm(3, 3') are installed and interconnected with operating member(6, 6') through lot bars(4, 4'). Operating levers(8, 8'), a plurality of connecting bars, are installed in the operating lever housings to be attached/detached up and down. The operating levers are drawn out longer than the operating members while driving. Driving force doubles according to a multiple of the length of the operating levers by a principle of a lever. |
