To provide left and right cranks, which are deformed to incline positions at which the cranks are mounted on a chain ring rotary shaft, so that a moment when stepping force becomes zero on a circumferential track of a step-in pedal can be eliminated to ease travelling in a load status.SOLUTION: In the bicycle easily deforming cranks, shapes of bicycle cranks are deformed and therefore a step-in side deformed crank (1) is mounted obliquely in an advancing direction on a chain ring rotating shaft (8) and an opposite-side pull-up side deformed crank (2) is mounted on the chain ring rotating shaft (8) symmetrically at 180 degrees, so that stepping force (a) of feet is alternately transmitted to chain ring rotation force (C) even at any positions on circumferential tracks of pedals (3) and (4), which eliminates a moment when the force becomes zero. Further, the deformed cranks (1) and (2) are made of raw materials having flexible movable areas and also have curved shapes, which can increase self-travelling performance by stretch and rebound to soles of feet and prevent transmission of impact such as a road surface and soften the impact.SELECTED DRAWING: Figure 1

    【課題】 左右のクランクを変形させて、チェーンリング回転軸への取り付け位置を傾ける事により、踏み込みペダルの円周軌道上で、無力になる瞬間を無くし、負荷状況走行を緩和するクランクを提供する。【解決手段】 自転車クランクの形状を変形させ、踏み込む側変形クランク(1)を、チェーンリング回転軸(8)の進行方向に傾けて取り付け、また反対側引きあがる側変形クランク(2)を、180度対称的にチェーンリング回転軸(8)に取り付ける事により、足が踏み込む力(A)は、ペダル(3)(4)の円周軌道上如何なる位置でも、交互にチェーンリング回転力(C)へ伝わり、無力になる瞬間を無くす様設ける。また、変形クランク(1)(2)は、柔軟な可動域を有した素材とすることにより、湾曲のある形状と合わせて、足裏との伸展反発による自走行性も増し、そして路面等の衝撃を足裏に伝えにくく和らげる効果もある、自転車楽々変形クランクを特徴とする。【選択図】図1


    Access

    Download


    Export, share and cite



    Title :

    BICYCLE EASILY DEFORMING CRANK


    Additional title:

    自転車楽々変形クランク


    Contributors:

    Publication date :

    2020-01-09


    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



    Bicycle crank arm and bicycle crank assembly

    YAMANAKA MASAHIRO / NISHIMOTO YUSUKE / NONOSHITA TETSU et al. | European Patent Office | 2016

    Free access

    Bicycle crank

    XU XIWEI | European Patent Office | 2015

    Free access

    Bicycle crank assembly

    CARRASCO VERGARA PABLO | European Patent Office | 2020

    Free access

    BICYCLE CRANK ASSEMBLY

    HARA NOBUKATSU | European Patent Office | 2018

    Free access

    BICYCLE CRANK ASSEMBLY

    TETSUKA TOSHIO / FURUYA TAKASHI / MORI SHINTARO | European Patent Office | 2018

    Free access