| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic case having a bottom plate structure in which an inserting piece into a notch of an entangled bottom structure can be easily inserted, workability at the time of assembling the case can be improved and further, the inserted piece can be prevented from getting loose. SOLUTION: A width size W1 of an extremity end 54a and a width size W2 of a base end 54b at an inserting piece 54 arranged at a male bottom plate 51 of an entangled bottom structure are set to be lower than a width size W3 of a recess 33 of a female bottom plate 31, a width size W4 of an intermediate segment 54c is substantially the same as the width size W3 of the recess 33 and an entire shape of the inserting piece 54 is formed into a substantial hexagonal shape.
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