| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging box capable of improving the strength of locking, without spoiling the beauty, with a simple configuration.SOLUTION: A packaging box 2 includes a front wall part 10, a rear wall part 12, a pair of sidewall parts 14 and 14, a bottom wall part 16, an extension part 26 extended to an upper end of the rear wall part 12, tucking pieces 17 and 17 extended to upper ends of sidewall parts 14 and 14 and tucked inside, an upper lid part 18 extended to the upper end of the front wall 10 and clogging an upper opening 23 by being bent inside, an insertion piece 54 extended to the tip of the upper lid part 18 and inserted in the inside of the rear wall part 12, an insertion piece slit 60 formed at both side parts in a base end of the insertion piece 54, a protrusion part 74 provided at a side edge of the rear wall part 12 side of the tucking piece 17 and engaged with the insertion piece slit 60, protrusion pieces 58 and 58 provided at both side parts of a tip edge of the upper lid part 18 and projected to the rear wall part 12 side, and rear wall slits 90 and 90 formed at both side parts of the boundary between the rear wall part 12 and the extension part 26 and engaged with the protrusion piece 58. |
