| 摘要 |
PURPOSE:To eliminate the accommodating mistake of a magnetic disc pack in a corresponding case due to carelessness by making it possible to joint the block at a pack case and the block at a disc pack with the use of a unique key. CONSTITUTION:A disc pack body 2 and a flange 4 are formed with key portions 11 and 12, respectively, so that they can be fitted with the same width of the key grooves of the key portions 11 and 12. On the other hand, the other disc pack device is formed with a key portion having a different groove width. As a result, since the key portions 11 and 12 other than the paired devices cannot be combined, the engagement between the body 2 and the glange 4 at the pawl portion 7 does not take place. As a result, it is possible to prevent the accommodating mistake of a magnetic disc pack in a corresponding case due to carelessness. |
