Collapsible trailer for a bicycle or similar vehicle

A collapsible trailer comprising:

• a chassis including:
• an upper frame assembly defining an upper limit of the chassis, the upper frame assembly having a front end and a rear end;
• a lower frame assembly defining a lower limit of the chassis, the lower frame assembly having a front end and a rear end, the front end being pivotally connected to the front end of the upper frame assembly;
• a back frame unit including a pair of oppositely disposed back frame members, each back frame member having:
• a first end pivotally connected to the rear end of one of said upper and lower frame assembly;
• and
• a second end removably securable to the rear end of the other one of said upper and lower frame assembly, the back frame unit being pivotable around the first end of the back frame members between a folded position, where the upper frame assembly is rotated towards the lower frame assembly for folding the chassis into a compact position, and an opened position, where the second end of each of the back frame members is secured to said other one of the upper and lower frame assembly for opening and keeping the chassis in the open position;
• a canvas adapted to tightly fit over the chassis to limit the rotation of the upper frame assembly away from the lower frame assembly in a maximum angular relationship as the chassis is in the open position;
• and
• securing means for removably securing the second end of each back frame member to the rear end of said other one of the upper and lower frame assembly;
• the securing means comprising, for each back frame member, a retractable peg operatively mounted at the second end thereof, the peg being movable between a locking position where it is protruding from said second end for engaging a corresponding opening in said other one of the upper and lower frame assembly, and a retracted position for disengaging the peg from said corresponding opening and
• at least two wheels operatively connected to the lower frame assembly to support and displace the chassis forwards or backwards.