| 摘要 |
PURPOSE:To prevent misinsertion and also to improve the store efficiency even with a flat cassette by providing plural divided plate-shaped projection bars at the center of a hollow bottom. CONSTITUTION:Thin plate-shaped projection bars 10 are set on a straight line on a surface 7a which is right close to a back surface 8a opposite to a window 8 with a trapezoid section and at the center of the bottom of a trapezoidal groove 9. The tip of each bar 10 is lower than the surface 7a. In addition, cassettes 7 have the same thickness and can be easily put on each other or arranged orderly in a box or on a shelf with no undesired space produced. An opening part 13a is formed to a cassette deck inserting part 13 to guide the groove 9 and bars 10. Thus the cassette insertion is possible only when the window 8 is set at the front side, and the cassette insertion is impossible when the window 8 is set at the other side. This prevent a misinsertion even with a flat cassette.
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