Cargo box

A cargo box for transporting a cart having guiding rods, comprising:

• a cargo box body configured to accommodate the cart;
• and
• a cargo box hatch disposed on a side of the cargo box body and connected to a bottom of the cargo box body, the cargo box hatch being able to be raised, lowered, opened, and closed, wherein when opened, the cargo box hatch provides an access for the cart to be moved into and out of the cargo box body,
• wherein the cargo box body comprises:
• a first rail extending along a first direction, the first rail being disposed within the cargo box body and on the bottom of the cargo box body, the first rail being capable of accommodating the guiding rods, such that the cart is movable along the first direction;
• and
• a liftable holder, comprising:
• lift rods extending in a second direction, the lift rods being disposed on both laterally opposite sides of the first rail;
• a connecting rod connected to the lift rods and being movable upwards and downwards along the lift rods;
• a branch portion disposed on the connecting rod;
• and
• one or more holding portions disposed on the branch portion, the one or more holding portions being configured to contact a top surface of the cart when the connecting rod is lowered,
• wherein the first rail is provided with at least one set of safety latches along the first direction, wherein the at least one set of safety latches include two stoppers configured to hold the cart at a predetermined position on the first rail by restricting movement of the guiding rods along the first rail in the first direction, a spacing between the two stoppers being determined based on a distance between the guiding rods located on front and rear ends of the cart.