Packaging case

Abstract

A cylindrical packing case extending in an upper-lower direction, comprising an upper unit, a lower unit provided with a front side surface and a rear side surface in the circumferential direction, a pair of convex folding units upwardly extending from the front side surface and the rear side surface of the lower unit. A first weak line is provided along a first boundary between the upper unit and the convex folding unit, a second weak line is provided along a second boundary in the circumferential direction between the upper unit and the lower unit. A first folding ruled line is provided in the circumferential direction between the convex folding unit and the lower unit, and a second folding ruled line extending in the upper-lower direction continuing from between the front side surface and the rear side surface of the lower unit, is provided in the convex folding unit.

1 . A cylindrical packaging case extending in a vertical direction, comprising:
 an upper portion;   a lower portion in which a front side surface and a rear side surface are provided in a circumferential direction; and   a pair of convex folding-back portions extending out in an upper direction from the front side surface and the rear side surface of the lower portion, wherein   a first weakened line is provided along a first boundary line between the upper portion and the convex folding-back portions,   a second weakened line is provided along a second boundary line in the circumferential direction between the upper portion and the lower portion,   a first folding ruled line is provided in the circumferential direction between the convex folding-back portions and the lower portion, and   second folding ruled lines extending continuously in a vertical direction from between the front side surface and the rear side surface of the lower portion are provided inside the convex folding-back portions.   
     
     
         2 . The packaging case according to  claim 1 , wherein the upper portion and the convex folding-back portions are not connected in at least a part of the first weakened line. 
     
     
         3 . The packaging case according to  claim 2 , wherein the first weakened line comprises straight weakened lines and curved weakened lines, and
 the upper portion and the convex folding-back portions are not connected in at least a part of the curved weakened lines.   
     
     
         4 . The packaging case according to  claim 1 , wherein in the upper portion, a finger grip portion is provided along a part of the first weakened line and the second weakened line. 
     
     
         5 . The packaging case according to  claim 1 , wherein the front side surface of the lower portion comprises a single curved surface. 
     
     
         6 . The packaging case according to  claim 1 , wherein in the lower portion, a plurality of convex rising portions extending out in a lower direction from the front side surface and the rear side surface of the lower portion are provided, and
 the plurality of convex rising portions are provided at equal intervals.   
     
     
         7 . The packaging case according to  claim 1 , wherein when the upper portion is separated, and the convex folding-back portions are folded back towards the inside or the outside of the lower portion along the first folding ruled line and the second folding ruled lines, a cleaning tool having a hand grip and a dust suction portion is configured to be stored inside the lower portion.