Collapsible wagon comprising a tailgate

A wagon that is adjustable between an expanded configuration and a collapsed configuration, the wagon comprising:

• a frame, the frame having a front wall, two side walls, and a rear tailgate, each of the front wall, side walls, and the tailgate being formed by a respective scissor-bar assembly, the frame also having a vertically oriented telescoping pole assembly at each intersection where the scissor-bar assembly of the front wall meets each of the side walls, the frame further having a vertical telescoping pole assembly connected to each rear end of the scissor-bar assemblies of the side walls and a telescoping poll assembly at each side end of the scissor-bar assembly of the tailgate, the tailgate and the telescoping polls attached thereto being pivotal from a substantially vertical orientation to a substantially horizontal orientation when the wagon is in the expanded configuration, the frame being such that as the wagon is altered from the wagon's expanded configuration to the wagon's collapsed configuration with the tailgate in its vertical orientation the scissor-bar assemblies and the telescoping pole assemblies increase in height and the scissor-bar assemblies decrease in width;
• four wheels, each being attached to a bottom end portion of a respective one of the telescoping pole assemblies;
• and
• a pliable liner that is connected to the frame and that defines an open-top interior compartment of the wagon when the wagon is in the wagon's expanded configuration.