To provide a light-weight connection member for connecting a crank to a chain wheel capable of rotating on an axis of rotation in a circumferential direction.SOLUTION: A coupling member comprises a body part, a plurality of arm parts, and a first recessed part. The body part is in an annular shape surrounding a center axis extending in an axial direction. The arm parts extend at least radially outward from the body part when viewed from the axial direction. The first recessed part is arranged on an axial end face of at least one of the body part and the arm parts, and recessed in the axial direction. The arm part is asymmetrical about an axis of symmetry when viewed from the axial direction.SELECTED DRAWING: Figure 3

    【課題】中心軸を中心として周方向に回転可能なチェーンホイールにクランクを連結するための軽量な連結部材を提供する。【解決手段】連結部材は、胴体部と、複数のアーム部と、第1凹部と、を備える。胴体部は、軸方向に延びる中心軸を囲む環状である。アーム部は、軸方向から見て、胴体部から少なくとも径方向外方に延びる。第1凹部は、胴体部及びアーム部のうちの少なくとも一方の軸方向端面に配置されて、軸方向に凹む。軸方向から見て、アーム部は、対称軸に対して非線対称な形状とする。【選択図】図3


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    Title :

    CONNECTION MEMBER, BICYCLE, AND ELECTRIC-ASSISTED BICYCLE


    Additional title:

    連結部材、自転車、電動アシスト自転車


    Contributors:

    Publication date :

    2022-11-10


    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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