PROBLEM TO BE SOLVED: To solve the problem that conventionally a vertically movable bicycle crank is not available.SOLUTION: It is possible to provide a vertically movable bicycle crank 1 which is constituted such that a member 3C can be moved vertically on the inner side of a member 3B by the action of a compressed hydraulic damper 5 when a certain weight or more is applied to pedals 15, 15A while travelling by a bicycle in which pedal shafts 11, 11A are attached to openings 5B formed on right and left of a lower part of the member 3C, where the compressed hydraulic damper 5 is provided, on the inner side of the crank 1 where the member 3C is provided on the inner side of the member 3B.SELECTED DRAWING: Figure 13

    【課題】従来、上下移動可能な自転車用クランクはなかった。【解決手段】部材3Bの内側に部材3Cを設けたクランク1の内側に、圧縮油圧ダンパー5設けられている部材3Cの下部左右の開口部4Bにペダル軸7及びペダル軸5前記開口部4Bに取付けた自転車での走行時、前記ペダル12,12Aに一定以上の加重が加わった時、前記部材3Cが前記圧縮油圧ダンパー5の作用により前記部材3Bの内側を前記部材3Cが上下移動可能に構成された自転車用上下移動可能なクランク1を提供することが可能となる。【選択図】 図13


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    Title :

    VERTICALLY MOVABLE BICYCLE CRANK


    Additional title:

    上下移動可能な自転車用クランク。


    Contributors:

    Publication date :

    2018-06-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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