Bed cover assembly for pickup truck

A bed cover assembly for a pickup truck, the pickup truck comprising a body defining two body sides, the bed cover assembly comprising:

• cover guides including a pair of first guide rails coupled to upper ends of both body sides of a pickup truck;
• a bed cover disposed between the pair of first guide rails and configured to slide along the pair of first guide rails;
• and
• rotary guide rail assemblies arranged to face to each other and each including a pair of second guide rails and hinged to both body sides of a rear of the truck,
• wherein when the bed cover moves rearward along the pair of first guide rails and the pair of second guide rails of the rotary guide rail assemblies, the rotary guide rail assemblies rotate upward about respective hinge axes thereof,
• wherein:
• each of the rotary guide rail assemblies includes an upper portion and a lower portion,
• the upper portion is a guide hinged to an associated one of both body sides of the rear of the truck, and
• the lower portion extends in a flat form from the guide.