Foldable cart

A foldable cart comprising:

• a cart frame;
• wherein the cart frame having a rectangular frame composed of a front wall and a back wall which are symmetric with each other, two symmetric side walls, and a bottom frame, and four wheels being disposed at four corners of a bottom surface of the rectangular frame;
• wherein the front wall comprises two sliding seats, two vertical tubes, a folding assembly, two upper fixing seats and two lower fixing seats;
• wherein the sliding seats are slidably disposed around the vertical tubes, the upper fixing seats are mounted at upper ends of the vertical tubes, and the lower fixing seats are mounted at lower ends of the vertical tubes;
• wherein the folding assembly comprises two upper horizontal tubes, two sliding connecting tubes and a middle connection piece;
• wherein one end of each said upper horizontal tube and one end of each said sliding connecting tube are riveted to the middle connecting piece, and the other end of each said upper horizontal tube and the other end of each said sliding connecting tube are riveted to one said upper fixing seat and one said sliding seat respectively;
• wherein each of the side walls comprises two X-shaped side assemblies, a middle support tube, and a sliding sleeve slidably disposed around the middle support tube;
• wherein a plurality of middle fixing seats are disposed at an upper end and a lower end of the middle support tube respectively;
• wherein each of the X-shaped side assemblies is formed by two side cross tubes which are riveted together;
• wherein the two X-shaped side assemblies are symmetrically arranged on a front side and a back side of the middle support tube;
• wherein upper ends of the two X-shaped side assemblies are riveted to the middle fixing seat at the upper end, and lower ends of the two X-shaped side assemblies are riveted to the sliding sleeve;
• the bottom frame comprises two X-shaped support assemblies, two bottom short tubes and a support seat;
• wherein one end of one said bottom short tube and one end of the other bottom short tube are riveted to a front side and a back side of the support seat respectively, and the two X-shaped support assemblies are symmetrically disposed on two sides of the two bottom short tubes;
• wherein each of X-shaped support assemblies comprises a center seat and four support tubes symmetrically riveted to the center seat;
• and
• wherein each said support tube has an end riveted to the corresponding lower fixing seat or the middle fixing seat at the lower end, and the center seat is riveted to the other end of each said bottom short tube.