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1. (WO2018103107) SPEED CHANGE METHOD FOR AUTOMATICALLY CHANGING BICYCLE SPEED

Pub. No.:    WO/2018/103107    International Application No.:    PCT/CN2016/109338
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Sun Dec 11 00:59:59 CET 2016
IPC: B62M 25/02
Applicants: SHENZHEN 7SHINE TECHNOLOGY CO., LTD
深圳市七尚科技有限公司
Inventors: CHEN, Hao
陈昊
ZHANG, Zaifu
张在夫
Title: SPEED CHANGE METHOD FOR AUTOMATICALLY CHANGING BICYCLE SPEED
Abstract:
A speed change method for automatically changing bicycle speed, comprising the following steps: when torque applied on a crank which is connected to a foot pedal is "zero" or approximately "zero", completing gear shifting. Said speed change method for automatically changing bicycle speed completes gear shifting when the torque applied on the crank which is connected to the foot pedal is "zero" or approximately "zero" by means of controlling the timing of completing gear shifting; in such a state, force is not applied to a chain or the force is approximately zero, thus eliminating the risk of breaking the chain, while the obvious missing of a step will not occur, feet will not slide out of foot pedals, and riding feel is smooth so as to bring a good riding experience to a bicycle rider.