Foldable Frame for a Cart

A type of foldable frame for a cart, which is characterized to include the front wheel unit part, the rear wheel unit part, the side-wall connection structure, the scissor structure I, the scissor structure II, the bottom support structure, the tie rod and the tie rod connection support structure. Totally, two groups of the said front wheel unit part and the rear wheel unit parts are provided and they have the same structure. The said front wheel unit part includes the column, the wheel clamp, the sliding sleeve and the moving wheel. The said moving wheel is rotary-set at the bottom of the wheel clamp and the said column is set at the top of the wheel clamp. The said sliding sleeve is slide-set at the column and the bottom end of the said scissor structure I is hinged at the bottom of the column. The top of the said scissor structure I is hinged at the sliding sleeve, and the said scissor structure II and scissor structure I have the same structure and are connected at two groups of the said rear wheel unit part. Totally, two groups of the said side-wall connection structure are set and they are connected at the front wheel unit part and the rear wheel unit part by the same side. The said bottom support structure is movable-connected at two groups of the said front wheel unit part and rear wheel unit part. The said tie rod connection support structure is rotary-set at the columns of two groups of the said front wheel unit part and the said tie rod is set at the tie rod connection support structure.