| 摘要 |
PURPOSE: An auxiliary travelling device for a bicycle is provided to install an auxiliary device operating as a lever into a pedal and a handle, and to front wheel drive while improving travelling speed. CONSTITUTION: An auxiliary travelling device in a bicycle comprises left/right cranks(11) using a lever principal of pedals(12) mounted on the cranks; a cam member(14) installed on an end of a pedal shaft(13) to rotate; and an extent spring(15) connected to an en of the cam member while being fixed on the end of the pedal shaft. The pedal comprises a principal shaft rod(12a) installed on the pedal shaft; front/back adjusting rods(12b,12c) controlling length of both ends of the principal shaft; a foot holder(12d) protruded on an upper end of the front /back adjusting rod; and a control bolt(12e) fixing the front/back adjusting rods. A rear length of the pedal(L1) is longer than a front length of the pedal.
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