PROBLEM TO BE SOLVED: To provide a pin for a crown of a bicycle crank set, which securely performs an outer link gear shift operation and prevents occurrence of inner link gear shift operation.SOLUTION: A pin comprises: a mount part 20 extending along an axis X of a pin 110 and fixed to a crown 12, the mount part 20 having a first dimension 21a along a direction Y perpendicular to the axis X; and a chain engagement part 30 associated with the mount part 20 and having a second dimension 21b greater than the first dimension 21a along the direction Y, the engagement part 30 having: a first face 32 facing the mount part 20 and engaged with a plate 42a of a link 42 of a bicycle chain 40; and a second face 34 facing the mount part 20 in an opposite direction. In this pin, the second face 34 has a first surface part 136 inclined at a first angle, smaller than 90°, with respect to the axis X [an angle including the axis X and measured in a longitudinal flat cross-section of the pin 110 perpendicular to the direction Y].SELECTED DRAWING: Figure 6

    【課題】外側リンクギアシフト動作を確実に行い、内側リンクギアシフト動作の発生を防止する自転車クランクセットのクラウン用ピンの提供。【解決手段】ピン110の軸Xに沿って延び、かつクラウン12に固定される取付部20であって、軸Xに垂直な方向Yに沿った第1寸法21aを有する取付部20と、取付部20に関連付けられ、かつ方向Yに沿った第1寸法21aよりも大きい第2寸法21bを有するチェーン係合部30と、を備え、係合部30が、取付部20に面し、かつ自転車チェーン40のリンク42のプレート42aと係合する第1の面32と、取付部20に対して反対方向に面する第2の面34とを備えるピンにおいて、第2の面34が、軸Xに対して90°よりも小さい第1の角度[軸Xを含み、かつ方向Yに対して垂直であるピン110の長手断平面で測定される角度]で傾斜した第1表面部位136を備えるピン。【選択図】図6


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    Title :

    PIN USED IN CROWN OF BICYCLE CRANK SET


    Additional title:

    自転車のクランクセットのクラウンに用いられるピン


    Contributors:
    MINTO MARCO (author)

    Publication date :

    2018-06-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16H Getriebe , GEARING / B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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