CASSETTE STRUCTURE OF BAND-SHAPED MEDIUM

PURPOSE:To permit the stable traveling of a band-shaped medium having a large width by installing a fitting part at the edge part on the opposite side to the driving-member insertion side of a reel and installing a bearing part for pivotally supporting the fitting part into a cassette case and regulating the positions in the revolution direction and axial direction of the reel. CONSTITUTION:The opened part 1a of a cassette case 1 is inserted into the driving shaft of a reel board 5, and the cassette is mounted into the apparatus so that the driving shaft is fitted with the shaft part of a reel 2, and a cover 6 is closed. Then, since a spring 7 installed onto the cover 6 pushes-down the bearing part 1b of the cassette case 1, the second engagement part 2b of the reel 2 contacts with the contact part 5a of the reel board 5, and the position of the reel 2 in the axial direction is regulated by the nipping between the contact part 5a and the bearing part 1b. Then, the first engagement part 2a of the reel 2 is engaged with the rib 5b of the reel board 5. Since the fitting part 2d of the reel 2 is pivotally supported onto the bearing part 1b of the cassette case 1, the position of the reel 2 in the direction of revolution is regulated.