| 摘要 |
<p>PURPOSE:To attain a desired auto-repeat by a simple constitution by changing tape run directions by controlling an intermittent rotation driving body by a mechanical unit which memorizes reproduction and rewind positions through differential gears. CONSTITUTION:Discs 126a and 126b are turned differentially by gear 16 changing rotation directions according to a tape run direction through gears 124a and 124b differing only in the number of teeth, and pawl 144 which has memorized a reproduction position by engaging in grooves 184a and 184b of discs 126a and 126b never engages again until grooves 184a and 184b agree through rewinding operation. When the slide of lever 138 caused by the engagement between this pawl 144 and grooves 184a and 184b is transmitted to lever 40, a setting state by pin 35 of intermittent-tooth gear 31 is released, so that gear 31 will stop after rotating once engaging with capstan turning gear 30 through spring 39. During this period, a rewind state is changed over to a reproduction state through cam 34, etc., by intermittent rotation. A change from the reproduction to rewind operation is performed in the same way and an auto-repeat in a desired interval is made by a simple constitution requiring no solenoid, etc.</p> |
