| 摘要 |
<p>PURPOSE:To detect the tape trailing ends of both cassettes in a tape recorder capable of using both a digital compact cassette and an analog compact cassette. CONSTITUTION:The projector 5 and the light receiver 6 of an optical sensor are buried in a columnar body 4 inserted into the reference hold 12 of the internal one of two reference holes provided on a cassette main body, in the case of a DCC, a light emitted from the projector 5 is reflected by a light reflection layer formed on the surface in the vicinity of the connecting part of a reader tape part of the connecting part between the reader tape and a magnetic tape, a reflected light is received by the light receiver 6, the operation of the optical sensor is activated and the trailing end of a tape 3 is detected. In the case of an ACC, since the light is transmitted through the reader tape part, a light emitted from the projector 5 is transmitted through the reader tape part, reflected by a reflector 7, the reflected light is transmitted through the reader tape again and received by the receiver 6, the optical sensor is activated to detect the trailing end of the tape 3.</p> |
