| 摘要 |
A reel shaft is mounted in a recording and/or reproducing apparatus such as a DAT unit for rotating a reel hubs in a tape cassette loaded in a predetermined position in the apparatus to reel up a magnetic tape into the reel hubs. The reel shaft includes a plurality of vanes secured to the outer periphery of a rotating body and adapted to be in engagement with corresponding engaging members formed in the reel hub. The vanes define respectively ridges extending in alignment with a center line in width of the magnetic tape when the tape cassette is in a predetermined loaded position in the apparatus. The reel hub is rotated with the reel shaft through engagement between the vanes and the corresponding engaging members, which is effected at specific points located on the ridges of the respective vanes of the reel shaft. Through such engagement, the axis of the reel hub remains coincident with the axis of the reel shaft during rotation.
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