The present invention discloses a bicycle for preventing an escape of a chain. The bicycle according to the present invention comprises: a rotation body fixed to a crank shaft that is connected to a pedal, and rotated together with the crank shaft; a first gear shift portion including outside a first securing gear that is fixed to the rotation body, rotated together therewith, and engaged with a power transmitting member; a second gear shift portion with a greater diameter than the first gear shift portion, wherein the second gear shift portion includes a second securing gear that is formed to be in plural, capable of sequentially moving in a shaft direction of the crank shaft, and engaged with the power transmitting member on an outer surface thereof; and a guide portion connected to the rotation body and the second securing gear, and guiding the second gear shift portion to move in the shaft direction of the crank shaft.

    체인 이탈 방지형 자전거에 대한 발명이 개시된다. 본 발명의 체인 이탈 방지형 자전거는: 페달과 연결된 크랭크축에 고정되며 크랭크축과 함께 회전되는 회전몸체와, 회전몸체에 고정되어 회전몸체와 함께 회전되며 외측에는 동력전달부재에 맞물리는 제1걸림기어를 구비하는 제1변속기어부와, 복수로 구획되어 크랭크축의 축방향으로 복수개가 순차적으로 이동이 가능하며 제1변속기어부 보다 큰 직경을 가지며 외측에는 동력전달부재에 맞물리는 제2걸림기어를 구비하는 제2변속기어부 및 회전몸체와 제2걸림기어에 연결되어 제2변속기어부가 크랭크축의 축방향으로 이동되는 동작을 안내하는 가이드부를 포함하는 것을 특징으로 한다.


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    Title :

    BIKE FOR PROTECTING BREAKAWAY OF CHAIN


    Additional title:

    체인 이탈 방지형 자전거


    Contributors:
    SIM BYUNG KWON (author) / LEE SANG HYUK (author) / BAE SU MIN (author) / YOUN JONG SU (author) / LEE BOO YOUN (author)

    Publication date :

    2017-02-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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