| 摘要 |
<p>PURPOSE:To protect a copyright by preventing a 2nd unit from performing a recording operation when an erroneous erasure preventing mechanism of a tape cassette loaded in a 1st unit is under a recording inhibitory state. CONSTITUTION:With regard to a tape cassette 15 without a slider 38 but with an erroneous erasure prevention detecting hole 36 under its opening state, when this tape cassette 15 is loaded into the 1st unit, the opening state of the detecting hole 36 is detected via a probe 39 by a detecting part 24. Then, a switch 25 is opened by interlocking with this detection. Consequently, even when an operation part 26 is operated, a recording circuit 22 is not operated, and hence the recording operation by the 2nd unit is obstructed. By this method, a soft tape borrowed from a rental shop, etc., cannot be dubbed, thus ensuring that the copyright is protected.</p> |
