| 摘要 |
PURPOSE:To prevent the damage of the tape and the disturbance of winding of the tape due to oscillation of the reel to make the tape long-life, by operating the tape running driving circuit after the operation of the reel locking mechanism. CONSTITUTION:Reel hub 1 is put on the reel turntable, and rotary disc 33 is rotated. Pin 18 slides cam groove 21 to press reel hub 1, and reel pressing piece 2 and spring pressing piece 5 are moved downward, and magnet 12 is pressed downward through rod 11, and the distance between magnet 12 and Hall element 13 is reduced. Since the output voltage from the amplifier is changed by the change of the distance between Hall element 13 and magnet 12, this change is used as decision information for the locking state. As the sensor for reel locking confirmation, the reflective photoelectric detecting element is used. |
