To enable a rider to easily put his/her foot onto the ground surface when a motorized bicycle traveling at low speed stops.SOLUTION: A vehicle body frame structure of a motorized bicycle that travels at low speed includes a head tube 2 to which an operation handle 7 is attached, a down tube 3 extending obliquely downward from the head tube 2, a curved part 4 provided in a lower end of the down tube 3, and a rear tube 5 extending obliquely upward from the curved part 4. The down tube 3, the curved part 4, and the rear tube 5 are formed from a single frame. With reference to a midpoint M of a line connecting a front wheel axle 101 and a rear wheel axle 131, the curved part 4 is arranged from a range within 20% of a wheel base H in front of the midpoint M to a range within 20% of the wheel base H in the rear of the midpoint M. Stationary foot rest parts 18 laterally protruding locally from the curved part 4 is provided.SELECTED DRAWING: Figure 2

    【課題】低速で走行する原動機付自転車の停止時に運転者が容易に地面に足を着けることができる。【解決手段】低速で走行する原動機付自転車の車体フレーム構造であって、操作ハンドル7が取り付けられるヘッドパイプ2と、ヘッドパイプ2から斜め下方に延設されたダウンチューブ3と、ダウンチューブ3の下端に設けられた曲がり部4と、曲がり部4から斜め上方に延設されたリアチューブ5とを備え、ダウンチューブ3と曲がり部4とリアチューブ5がシングルフレームで形成され、曲がり部4が、前輪軸101と後輪軸131とを結ぶ線分の中点Mを基準にして、中点Mの前側のホイールベースHの20%の範囲内から中点Mの後側のホイールベースHの20%の範囲内までの範囲に配置され、曲がり部4から局所的に左右に突出する足載せ部18が定置して設けられる。【選択図】図2


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    Title :

    VEHICLE BODY FRAME STRUCTURE AND MOTORIZED BICYCLE


    Additional title:

    車体フレーム構造及び原動機付自転車


    Contributors:

    Publication date :

    2024-07-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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