| 摘要 |
PROBLEM TO BE SOLVED: To make closing easy for a packaging case having a mechanism for locking a cover by a method wherein an insertion piece can be inserted smoothly into an insertion part of the case without interfering with a housed matter in the case. SOLUTION: A tongue-shaped piece 11 is formed at the side of the cover 3 so that the insertion part 9 wherein the insertion piece is inserted is separated from the housed matter 20 in the packaging case main body 2.
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