Mechanical energy harvesting system for converting kinetic energy of a user having a trunk and limb portions into electricity

A mechanical energy harvesting system adapted to be worn on a user having a trunk, a first limb portion swingable relative to the trunk, and a second limb portion swingable relative to the first limb portion, said mechanical energy harvesting system comprising

• a base seat unit including
• a first seat body adapted to be mounted on one of the trunk, the first limb portion and the second limb portion, and
• a second seat body reciprocally swingable relative to said first seat body, and adapted to be mounted on one of the trunk and the second limb portion when said first seat body is mounted on the first limb portion, and to be mounted to the first limb portion when said first seat body is mounted on one of the trunk and the second limb portion;
• a rotating shaft device rotatably mounted to said first seat body;
• a driving device disposed on said base seat unit and including
• at least one driving unit sleeved on said rotating shaft device for driving said rotating shaft device to rotate, and
• at least one transmission unit connected between said second seat body and said driving unit and configured to exert torque on said driving unit which drives said rotating shaft device to rotate when said second seat body swings relative to said first seat body, so as to permit said driving unit to generate rotational kinetic energy from relative movement between said first seat body and said second seat body;
• and
• a generator device connected to said rotating shaft device for converting the rotational kinetic energy into electric power,
• wherein:
• said rotating shaft device includes a rotating shaft having an externally threaded outer surface;
• said driving unit has an internally threaded surface threadedly engaging said externally threaded outer surface;
• said first seat body has a first end and a second end opposite to each other along said rotating shaft,
• said rotating shaft extends through said first end and said second end;
• and
• said second seat body is disposed adjacent to said first end of said first seat body and activates said transmission unit to move said driving unit toward and away from said second end along said rotating shaft to rotate said rotating shaft when said second seat body swings relative to said first seat body.