| 摘要 |
PROBLEM TO BE SOLVED: To reduce the manufacturing cost. SOLUTION: A first lid member part 14 and a second lid member part 16 are formed integratedly with a body storage part 12 on each side of the body storage part 12 so that the first lid member part 14 is arranged continuous to the second lid member part 16. Hinge parts 18, 20 are respectively provided between the body storage part 12 and the first lid member part 14, and between the body storage part 12 and the second lid member part 16 so that these parts are foldable. A plurality of slits 28 piercing the first lid member part 14 are respectively formed in the first lid member part 14, and a plurality of insertion pieces 30 are formed in a projecting manner corresponding to the slits 28 on a tip part side of the second lid member part 16. |
