Transmission system for treadmill and treadmill comprising the same

A transmission system for a treadmill, comprising:

• a driving roller, comprising a first synchronization rod and driving wheels arranged at both ends of the first synchronization rod;
• a driven roller, comprising a second synchronization rod and driven wheels arranged at both ends of the second synchronization rod;
• and
• first conveyor belts, arranged on driving wheels and driven wheels located on the same side, and forming transmission connection with the driving wheels and the driven wheels on the same side;
• wherein working faces of each of the driving wheels and of each of the driven wheels are provided with first edged portions arranged around outer circumferences of the driving wheels and the driven wheels, working faces of the first conveyor belts are provided with second edged portions adapted to the first edged portions, and the first edged portions are meshed with the second edged portions;
• wherein slots different from the first edged portions are arranged on the working faces of each of the driving wheels and of each of the driven wheels, the slots are arranged around circumferences of the driving wheels and the driven wheels, the working faces of the first conveyor belts are provided with bulges adapted to the slots which are different from the second edged portions, and the bulges are arranged to extend along a length direction of the first conveyor belts.