Expandable canopy tent frame

An expandable canopy tent frame, including:

• a first and second four-bar linkage set, each of the first and second four-bar linkage set comprises four cross-hinged bars arranged in two pairs;
• a central axial line having first and second central axis hinge points, wherein the central axial line is along a centerline of expansion of the four-bar linkage sets;
• each said four-bar linkage set of four cross-hinged bars are connected by four hinges, namely, a top and bottom central axial hinge along said central axial line, and two side hinges;
• each four-bar linkage set having a central axis along said central axial line, wherein the first four-bar linkage set overlaps the second four-bar linkage set;
• wherein the top hinge from the first four-bar linkage set is mounted on a lateral bar with the two side hinges from the second four-bar linkage set by slide bushings, and wherein the bottom hinge from the second four-bar set is mounted on a lateral bar with the two side hinges from said first four-bar linkage set by slide bushings;
• the first linkage set and second linkage set are mirror images of each other;
• and
• the tent frame has at least one fixed end and can be fixed on objects by utilizing that fixed end.