Modulated driving device for exercising bicycle, has spindle projecting out of running wheel so as to rotatably move drive wheel to move running wheel, where larger section of running and drive wheels lie freely outside housing

摘要

The device has a hollow housing (1) with two open ends and a drive wheel (2) is rotatably supported at an outer side of the hollow housing. A running wheel (3) is supported in the housing, and a spindle projects out of the running wheel so as to rotatably move the drive wheel to move the running wheel. A belt is mounted around the drive wheel, where a larger section of the running and the drive wheels lie freely outside the housing.