| 摘要 |
PURPOSE:To simplify the structure of a driving device body, by utilizing the energizing force of an elastic material for closing a head window shutter, which is incorporated in a cassette disk, as driving force for ejecting the cassette disk. CONSTITUTION:When a cassette disk 12 is inserted into a driving device body 13, a pawl 11 is made to press-contact with a shutter opening and closing lever 14 provided on the driving device body side. When the cassette disk 12 is inserted continuously against energizing force of an elastic member 7, a head window shutter 8 is gradually opened, and is held by a lock mechanism. When the lock mechanism is released by an eject button, etc., energizing force of the elastic member 7 works on the shutter opening and closing lever 14 through the pawl 11, and a part of the cassette disk projects from the driving device body. |
