| 摘要 |
<p>A magnetic tape cassette is designed with an interlock facility that only permits operation when a casette is in position. The four keys (40 to 43) for the selection of fast forward, and reverse, play and stop-eject operate against an interlock bar (50) behind the keyboard. Each contacts teh bar on a tapered slot section (51). Whether or not the keys are allowed to operate depends upon the interlock bar (50) moving relative to the main interlock mechanism (200). The interlock mechanism is designed to prevent movement in the absence of a cassette.</p> |
