US Patent 9039025 Foldable children's tricycle

A foldable children's tricycle comprises a tricycle front, a link device and a positioning assembly. The tricycle can be folded by using the link device, which can save space and reduce transportation cost. In addition, an inserting rod of the positioning assembly can be engaged in first or second positioning grooves of the link device, so the tricycle can be fixed when expanding or folding, thus improving the structural strength of the tricycle.