| 摘要 |
PROBLEM TO BE SOLVED: To provide a pachinko ball case designed to raise the bottom and cover the bottom with as small number of balls as possible so that the number of balls in the case looks more than it really is. SOLUTION: An inwardly-protruding raised bottom part 4 is formed at the center of a bottom plate 2 and peripheral recesses 5F, 5B, 5L and 5R each with a cross-sectional groove width just large enough to hold at least one pachinko ball are formed between the raised bottom part 4 and outer peripheral sidewalls 3F, 3B, 3L and 3R. The raised bottom surface 4A has its side cross section formed in the shape of an arc which is raised most on the longitudinal centerline of the ball bin, and the inclination angles of the outer peripheral sidewalls 3F, 3B, 3L and 3R are set to be greater than the inclination angles of the raised bottom sidewalls 4F, 4B, 4L and 4R to allow prize balls to be easily retained in the front and rear peripheral recesses 5F and 5B.
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