| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a long-life cassette body for a plate which restores to its original size without causing incorrect size of a shaft body or accumulation of stress-strain distortion in a resin part as it is cooled even after it is heated to be expanded. SOLUTION: This cassette body 1 stores a plate 1 such as a magnetic disc. The shaft body 8 is provided between two side plats 2 and 3, and the shaft body comprises a metal core member 12 and the resin part 13 covering that around it. Plural grooves 14 for the plate to be engaged are provided in the resin part. As the core member 12 is provided between the side plates, the resin part 13 is pressed to one side plate 3 by a spring member B.</p> |
