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An electric bicycle 1 comprises a motor powered driving assembly 2 including a flat type DC motor a speed reduction mechanism, a control circuit, a pedal load sensor, and a pedal rotation speed sensor which are integrally assembled together, the motor powered driving assembly being disposed adjacent

An electric bicycle 1 comprises a motor powered driving assembly 2 including a flat type DC motor a speed reduction mechanism, a control circuit, a pedal load sensor, and a pedal rotation speed sensor which are integrally assembled together, the motor powered driving assembly being disposed adjacent a lower median portion of a body frame. Through this arrangement it is possible to provide an electric bicycle which affords ease of control and good riding comfort and has relatively low center of gravity.

대표청구항 ▼

[ What is claimed is:] [1.] An electric bicycle, comprising(a) a frame (2) including a saddle pipe (6) having a saddle (5) connected therewith;(b) front (3) and rear (4) wheels rotatably connected with said frame;(c) a manually operated pedal driving assembly (10) connected with one of said wheels f

[ What is claimed is:] [1.] An electric bicycle, comprising(a) a frame (2) including a saddle pipe (6) having a saddle (5) connected therewith;(b) front (3) and rear (4) wheels rotatably connected with said frame;(c) a manually operated pedal driving assembly (10) connected with one of said wheels for rotating the same and including a pedal crank shaft (11); and(d) a motor powered driving assembly (20) arranged in a lower median portion of said frame below said saddle pipe and incorporating said pedal crank shaft for assisting said pedal driving assembly with rotating said one wheel, said motor powered driving assembly including(1) an electric motor (26);(2) a speed reduction mechanism (22) arranged between said motor and said pedal crank shaft; and(3) a control circuit (25) for activating said motor in accordance with the operating condition of said manually operated pedal driving assembly.