To provide a crank device with a power saving mechanism and a bicycle crank assembly.SOLUTION: A crank device includes: plural support assemblies including a crank mechanism which includes a crank, a shaft end gear, and a pedal end gear, a transmission mechanism which includes a rotation shaft having an annular groove formed in each of both ends, a first gear, and a second gear, outer ring parts connected to the rotation shaft, and balls stored in the annular grooves so as to be sandwiched between the rotation shaft and outer ring parts; and a rotation arm assembly including a first rotation arm, and a second rotation arm having one end connected to the first rotation arm and the other end connected to the pedal end gear. Accordingly, stability at a time of transmission can be upgraded and service life can be prolonged.SELECTED DRAWING: Figure 1

    【課題】省力化仕組み付きのクランク装置及び自転車クランクアセンブリを提供する。【解決手段】クランク装置は、クランク、軸端歯車及びペダル端歯車を含むクランク機構と、両端に環状溝が形成された回転軸、第1歯車及び第2歯車を含む伝達機構と、回転軸に接続され、外環部と、それぞれ回転軸と外環部との間に挟持されるように環状溝に収容されたボールと、を含む複数の支持アセンブリと、第1回転アームと、一端が第1回転アームと接続されるとともに他端がペダル端歯車と接続された第2回転アームと、を含む回転アームアセンブリと、を含む。これにより、伝達時の安定性を向上させるとともに使用寿命を延長させることができる。【選択図】図1


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    Title :

    CRANK DEVICE WITH POWER SAVING MECHANISM AND BICYCLE CRANK ASSEMBLY


    Additional title:

    省力化仕組み付きのクランク装置及び自転車クランクアセンブリ


    Contributors:

    Publication date :

    2024-10-07


    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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