Abstract: A two-point double toggle mechanism, in which a motor is used to drive a flywheel and cause a crankshaft to rotate, is arranged such that the crankshaft is pivot-jointed with a connecting rod to drive two sets of double toggle mechanisms disposed symmetrically on left and right sides of the crankshaft. Each toggle mechanism includes an L-arm. One end of the L-arm is pivot-jointed to the connecting rod via a guide pin, and one of two holes formed in the L-arm accommodates an eccentric shaft. The other end of the L-arm connects a toggle strip via a post pin, and the other end of the toggle strip is pivot-jointed with a guidepost via another post pin, which connects a sliding block located thereunder. When the crankshaft rotates to drive the connecting rod, the guide pin will move up and down linearly to unify angular motion of the double toggle mechanisms and keep the sliding block constantly horizontal while it is moved vertically up and down.