Patent ID: 9475544
Filing Date: 2016-10-25
CPC Classification: B62K,B62M

Claim Text:
1. A bicycle comprising: a frame that supports a front wheel and a rear wheel; a pair of up-and-down links that are respectively provided on a right side and a left side of the frame in a front view; a pair of pedals that are respectively supported by the pair of up-and-down links; and a drive unit that drives the rear wheel, wherein a front end of each link of the pair of up-and-down links is pivotally attached to the frame, and a rear end of each of the pair of up-and-down links is respectively connected to a respective pedal of the pair of pedals, wherein the drive unit includes a pair of crank arms that are arranged point-symmetrically at an angle of 180° in a front view, wherein a force that depresses each of the pair of pedals so that the pair of pedals alternately swing downward is transmitted to the pair of crank arms through the pair of up-and-down links, and wherein the bicycle further comprises a horizontally-holding mechanism that holds each pedal of the pair of pedals approximately horizontally while rotating each of the pair of up-and-down links, and the horizontally-holding mechanism includes a pair of pedal support links that are respectively set up on the pair of pedals, and a pair of horizontally-holding links, the rear end of each respective up-and-down link is pivotally attached to a respective pedal support link at a halfway position, an upper end of each pedal support link of the pair of pedal support links is pivotally attached to one end of a respective horizontally-holding link, and the other end of each of the pair of horizontally-holding links is pivotally attached to the frame.