CVT for bicycle usage

The present invention is as, that made an unnecessary time delay or a smooth speed change, without separation of the chain while driving facilitate and enhance the driving performance and riding comfort on the timing of the bicycle other hand, the arrangement of various types on the bicycle friction electric continuously-variable transmission device for it is possible to be installed so as to have a high space utilization. The present invention, and having an inner spherical be formed is recessed along the edges of the side surfaces, and having an inner spherical surface is recessed along the edges formed surfaces of the drive rotor, one aspect which power is input generated by a bicycle pedal bicycle in combination with the rear wheel provided with a driven rotor, outer convexly formed surface sphere that outputs power to bicycle rear wheel is rotated and installed so that the outer spherical surface is in contact within the surface of the inside spherical surface and the driven rotor of the drive rotor and each of the transmission from the driving rotor a rotating force from the counter rotor rotational axis with respect to the distance from the counter rotor, the rotational axis of the counter rotor counter rotor by changing the rotation axis angle of the routing to the driven rotor to the first point of contact for the driving rotor and the counter rotor contact the driven rotor and the counter rotor byeongak the means for changing the ratio of the distance of the contact to the second contact point It is configured to hereinafter. Friction electric, continuously variable transmission, bicycle