Patent ID: 7666121

Claim:
A surfing exerciser, comprising a seat, a seat frame, a chassis, a swing device, and a torsion spring; the seat being secured on the seat frame, the swing device comprising an upper flywheel, a lower flywheel, a Z-shaped swivel shaft, a small pulley shaft, and a belt; the Z-shaped swivel shaft comprising a lower swivel shaft having an axis, an upper swivel shaft having an axis and a connecting board, the lower swivel shaft being fixed to a lower surface of the connecting board, the upper swivel shaft being fixed to an upper surface of the connecting board, the axis of the lower swivel shaft obliquely intersecting with the axis of the upper swivel shaft, the upper flywheel being disposed above the chassis and rotatably fitted on the chassis through the lower swivel shaft of the Z-shaped swivel shaft; a first end of the seat frame being rotatably fitted on the upper swivel shaft of the Z-shaped swivel shaft through a transition rack, a second end of the seat frame being articulated to the chassis through a rocker; the small pulley shaft having a wheel driving portion located above the chassis and an axle portion passing through the chassis; the lower flywheel having a central hole for insertion of the axle portion of the small pulley shaft, the belt being disposed between the upper flywheel and the wheel driving portion of the small pulley shaft; the torsion spring being coupled to a front portion of the chassis and holding against the rocker for the seat at a high position constantly when in a static state.