| 摘要 |
PURPOSE:To prevent the destruction of information due to the static electricity as well as the adverse insertion of a cassette, by adding an external connector to the inside of a rotatable cover and a metallic bar for grounding to an adverse insertion preventing groove at the outside of a cassette. CONSTITUTION:When a cassette 1 is loaded, a pawl 6 is pushed by a cam of a magnetic bubble device. Then a rotatable cover 3 is turned and opened horizontally, and the magnetic bubble device is electrically connected to the cassette 1 via an external connector 7 provided inside the cover 3. While a groove 4 is formed at the side part of the cassette 1, and a metallic bar for grounding 5 is provided at the bottom of the groove 4. If the cassette 1 is loaded upside down, the insertion of the cassette 1 is prevented by a projected streak corresponding to the groove 4. This prevents the destruction of information due to the static electricity produced by a touch of a human body. At the same time, the adverse insertion of the cassette can also be prevented. |
