| 摘要 |
<p>PURPOSE:To prevent a trouble due to an intention and an error of VTR by installing a control circuit to release the connection of a cover body due to a stopper means when a beam, which falls from a light emitting element to the first and second photodetectors, is eliminated together. CONSTITUTION:When a tape cassette 13 applied to a VHS system is inserted to a window hole 14, the light from light emitting elements 20a and 20b falling on photodetectors 19a and 19b is interrupted, the signal to two input terminals of the NOR gate circuit 23 is eliminated, and therefore, the NOR gate circuit 23 outputs, a stopper driving circuit 25 operates, a stopper member 18 is pulled in in the (b) direction, the connection of a cover body 15 is released, and the condition which can record and reproduce is obtained. After the recording and reproducing are completed, and the tape cassette 13 is extracted and a cover-closing condition is returned, the stopper member 18 returns in the (a) direction. At such a condition, the stopper driving circuit 25 will not be operated and the stopper member 18 keeps a connection condition.</p> |
