Manpower-driven device with bi-directional input and constant directional rotation output

摘要

The present invention is related to a manpower driven device being able to do particular bi-directional pedaling to provide constant directional output for driving the loading wheel train, wherein its pedaling direction is selected by the rider according to his/her operating statuses of the muscles and joints, or the same directional outputs of different speed ratios is made further through the different driving directional inputs.