| 摘要 |
<p>PURPOSE:To obtain an inexpensive and highly accurate driving control mechanism by moving a brake shoe on the plane orthogonal with the shafts of a motor for driving and a reel system for driving so that the braking force can be regulated by the distance from the center of rotation. CONSTITUTION:An arm 17 which is parallel with the plane orthogonal with the shaft 14a of the capstan motor 14 and can turn around a base pin 18 is provided. An arm pawl 20 is slid on a cam surface 23a of a cam plate 23 by a cam plate 23 which is actuated by the fluctuation by the load increase on the capstan motor 14 and the fluctuation by the increase of a tape tension, by which the arm 17 is moved from the center of the shaft to the outer periph ery on the plane orthogonal with the shaft 14a of the capstan motor 14. The brake shoe 19 stuck on the arm 17 is pressed under a specified pressure, by which the braking force is increased toward the outer periphery of the rotating point. The load is provided and the tape tension is lowered. The inexpensive and highly accurate driving control is thus obtd.</p> |
