| 摘要 |
A device for loading or unloading a magnetic disc pack includes a lid pivotally supported by a main body of the magnetic recorder or reproducer; and an inner cassette holder pivotally supported on the main body or the lid, having a configuration in which the magnetic disc pack incorporating a magnetic disc can be received and which is capable of being separated from the lid or the main body to expose an opening, into which the magnetic disc pack is inserted when the lid is opened, and a push member for pushing the center core of the magnetic disc toward the rotary drive shaft. By the closing operation of the lid, the cassette holder is guided to a position where the center core of the magnetic disc can be coupled onto the rotary drive shaft and the push member is guided through a position where the push member pushes the center core of the magnetic disc and to a position where the push member is out of contact with the center core of the magnetic disc.
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