Patent attributes
The packing box includes a plurality of side wall parts, a bottom wall part, a housing part, an outer lid part, a tuck, an extending part, an inner flap, a slit, and an obstructive part. The obstructive part is folded along the side edge that crosses the other side wall part of the inner flap. Once the tuck is inserted, the extending part restricts the release of the outer lid part by being restored to the original state in the direction that crosses the extending direction of the slit. The obstructive part is placed in the course that reaches from the clearance between the top edge of the side wall part, the top edge crossing the other side wall part, and the inner flap to the extending part, whereby obstructing the approach from the outside of the packing box to the extending part.
