Packing box

A packing box comprising:

• a main body provided with an opening formed on one surface thereof such that an object is inserted into the main body through the opening;
• a left flap and a right flap extended from left and right edges of the opening opposite to each other to cover the opening;
• an insertion hole formed between a front edge of the opening and side edges of the left and right flaps adjacent to the front edge of the opening;
• a rear flap extended from a rear edge of the opening to be foldable and contacting upper surfaces of the left and right flaps;
• a front flap extended from the front edge of the opening to be foldable over the opening and provided with an insertion slot;
• an insertion flap extended from the front end of the rear flap to be foldable and inserted into the insertion hole;
• locking flaps extended from both sides of the insertion flap to be foldable, and unfolded to lock the rear flap after insertion of the locking flaps together with the insertion flap into the insertion hole;
• fracture guide cutting lines provided at the left and right flaps to guide fracture of the left and right flaps due to the locking flaps when the packing box is randomly opened;
• and
• opening guide cutting lines formed on the rear flap to separate the insertion flap and the rear flap from each other when the packing box is normally opened.

A packing box comprising:

• a body having a plurality of panels and a plurality of flaps extended from the corresponding panels to form a box shape;
• a first coupling unit formed on at least two of the flaps to be coupled to each other to form the box shape of the body in a first packing state, at least one of the flaps of the first coupling unit being configured to be folded to form the box shape of the body in the first packing state and subsequently unfold to maintain the first packing state, such that one or more of the flaps of the first coupling unit fractures when the first packing state is ended;
• and
• a second coupling unit formed on at least two of the flaps to be coupled to each other to form the box shape of the body in a second packing state after the first packing state has been ended, the second coupling unit being formed on at least one flap that the first coupling unit is not formed on,
• wherein the body is in one of the first packing state and the second packing state,
• wherein the plurality of flaps comprises left, right, front, and rear flaps;
• and
• the first coupling unit comprises the rear flap having an insertion flap and a locking flap, and the left and right flaps having a first portion to provide a first space to receive the insertion flap and a second portion to provide a second space to receive the insertion flap and the locking flap.