Patent ID: 7097596

Claim:
An exercise bicycle comprising: a frame having a base, a driven member having an end pivotably connected to said base, and a contacting portion positioned on said driven member; and a driven wheel stationarily rotatably connected to said base and having a rolling face contacted with the contacting portion of the driven member for driving said driven member to reciprocatingly pivot to said base when the driven wheel is driven to rotate; a driving wheel stationarily rotatably connected to said base, a crank connected at an end thereof to the driving wheel, a pedal connected to the other end of the crank for the user's leg pedaling, a saddle connected to the other end of the driven member, and a belt; wherein said driven wheel is a cam having a cylindrical axial neck protruded at a side thereof; said belt running on said driving wheel and said axial neck of the driven wheel; said contacting portion is formed of a roller that is rotatably connected to said driven member.