| 摘要 |
<p>PURPOSE:To prevent the sag and excessive tension of a tape and to prevent the tape from damage, by allowing a tape leading-out means to reciprocate at a nearly equal speed. CONSTITUTION:When a cam 162 rotates by 40-degree angle of rotation, gears 43 and 45 engage each other to move tape leading output members 182 and 183 at a nearly constant speed. Simultaneously, a pinch roll 192 approaches a capstan 72. When the cam rotates by 160 degrees, guide pins 23 and 27 abut on fixed members 184 and 185 and when by 180 degrees, the guide pins 23 and 27 are pressed against the fixed members 184 and 185. At this time, pinch roller 192 starts to bring it into contact with the capstan 72. When the cam rotates up to 200 degrees, the prescribed pressing of the pinch roll 192 ends. On rotation by 205 degrees, a motor is stopped. At this time, a belt 84, relay roll 82, and rotary arm 88 also rotate and an idler gear 86 engages with a gear 54a to turn a take-up reel turntable 10, thereby placing the magnetic tape device in playback mode without the sagging of a tape fed at a specific speed.</p> |
