Title:
BICYCLE EASILY DEFORMING CRANK
Document Type and Number:
Japanese Patent JP2020001670
Kind Code:
A
Abstract:
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
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Inventors:
HASHIMOTO YUJI
Application Number:
JP2018131874A
Publication Date:
January 09, 2020
Filing Date:
June 25, 2018
Export Citation:
Assignee:
HASHIMOTO YUJI
International Classes:
B62M3/00