| 摘要 |
<p>A tape cassette particularly for a 8 mm videotape cassette recorder has a double-lid structure formed by a front-lid (23) and a back-lid (32). A guide (37) is formed on the inside of the cassette housing (10) to define rotation of the back-lid (32). The shape of an upper portion of the guide (37) is determined as an arc of which the curvature radius (R) from a rotation centre of the front-lid (23) is selected in a range of from 5 to 6 mm. When the back-lid (32) is closed in a ganged relation with the front-lid (23), a clearance (L) of greater than 1.5 mm is maintained between the bottom edge portion (40) of the back-lid (32) and an upper edge of the magnetic tape (15). Since no contact between the back-lid (32) and the tape (15) can occur, damage to the magnetic tape (15) can be prevented.</p> |
