Damper gear structure of a body-building apparatus

A damper gear structure of body-building apparatus, comprising:

• a damper gear main body, shaped like a round disc and defining a central area and a peripheral side part, with the central area configured with a central through-hole to fit the driving shaft lever of the existing body-building apparatus;
• a ring-shaped interval, formed between the central through-hole and the driving shaft lever, so that the central through-hole and the driving shaft lever are coaxial but do not contact each other;
• a connecting and positioning member, to connect driving shaft lever and damper gear main body, including an axial hole and a connecting and positioning part configured on interval part of the periphery of the axial hole, wherein the axial hole is configured to fit the driving shaft lever in a fixed state so they can move together, while the connecting and positioning part is to be fixed on the central area of the damper gear main body;
• thus, the connecting and positioning part of the connecting and positioning member can be the driving and connecting part for the driving shaft lever to drive the damper gear main body, so that the driving and connecting part can be deviated beyond the outer diameter of the driving shaft lever, so as to increase the lever arm when the driving shaft lever drives the damper gear main body;
• as a result, the outer diameter of the damper gear main body can be relatively reduced to achieve the same revolving inertia.