MECANISME D'ENTRAINEMENT DESTINE A UN TRICYCLE POUR ENFANT.

摘要

A driving structure for children's tricycle includes a cylindrical shell adapted to receive a crank case therein. The crank case is composed of an upper and a lower half cases, each is identical to the other and has a trough and two strips adapted to rest a flat plate of the crank thereon, and has a flat plate at one having a crank receiving cup extending at the opposite end.