| 摘要 |
<p>PURPOSE:To prevent a message recorded on an endless cassette tape from shifting in head position by making the drum part of a take-up side reel turntable smaller in diameter than an engagement part for a reel hub and the drum part of a payoff side reel turntable larger in diameter than the engagement part for the reel hub. CONSTITUTION:The diameter d3 of the drum part 23 of the take-up side reel turntable 21 is larger than the internal diameter d4 of the claw part of the reel hub 26 of the endless cassette tape B. On the other hand, the diameter d2 of the drum part 22 of the payoff side reel turntable 20 is smaller than the diameter d5 of the hole 27 of the cassette half of the endless cassette tape B in which the reel turntable 20 is fitted, but larger than the internal diameter d4 of the claw part of the reel hub. The drum part 23 of the take-up side reel turntable 21 is smaller in diameter than the engagement part 25 for the reel hub, so even if the take-up side reel turntable 21 is driven to rotate, the reel hub 26 of the endless cassette tape B is not driven and the message recorded on the endless cassette tape B never shifts in head position. Consequently, the message recorded on the endless cassette table never shifts in head position.</p> |
