Control device for simulating road cycling for an exercising apparatus

Claim 1

A control device for an exercising apparatus, said control device being provided on an upper end of said exercising apparatus which has two foot pedals for driving a wheel; said control device comprising a flexible shaft being operatively connected to an axle of said wheel, a belt being provided around said wheel, one end of a cable being connected to said belt in order to operate said belt, a housing being provided on said upper end of said exercising apparatus, a casing being fixed in a middle portion of said housing, one end of a lever arm being pivoted to said casing, another end of said cable being connected to a substantially intermediate position of said lever arm so that said belt is actuated by said lever arm in order to adjust a frictional load on said wheel, a gearing mechanism having an output axle and being disposed in said casing, a worm gear being connected to the other end of said flexible shaft and being coupled to said gearing mechanism, a first cylinder being disposed on one end of said output axle of said gearing mechanism and being driven to rotate by said output axle when said wheel rotates an upper peripheral surface of said first cylinder having a profile of hills, said cable which is coupled to said belt having a tension to pull said lever arm downward so that the other end of said lever arm is forced to slide along said upper peripheral surface of said first cylinder when said first cylinder rotates; when said other end of said lever arm moves downward relative to said profile of said first cylinder, said cable being loosened so that said frictional load on said wheel is decreased; and when said other end of said lever arm moves upward relative to said profile of said first cylinder, said cable being tensioned so that said frictional load on said wheel is increased.