| 摘要 |
<p>PURPOSE:To obtain a device without beat even it is one where a fixed erasing head closely comes into contact with a reproducing head like a household VTR by positioning an electromagnetic shielding means which interlocks with the loading operation of a magnetic tape between the erasing head which becomes the source of disturbance and a rotary head cylinder where the reproducing head is loaded. CONSTITUTION:The magnetic tape 7 is housed in a tape cassette 15 before it is loaded and preceding guide 9 is also positioned at a recessed part in the cassette 15. Under such a state, the electromagnetic shielding member 10 contracts by own spring force and the force of an extension spring which is not shown in a figure. However, when the loading operation is started, the guide 9 is moved in the arrow direction of a broken line. Then, the tape 7 is drawn from the cassette 15 and moved to the rotary head cylinder 1 and the erasing head 4 side. Therefore, the member 10, a sliding shaft 11 and a bearing member 12 are also moved together with it and the tip part 11a of the shaft 11 is locked and restricted by a stopper 14. Thereafter, the member 10 is extended by the removement of the guide 9 and the space between the cylinder 1 and the head 4 is shielded.</p> |
