| 摘要 |
<p>PURPOSE:To correct automatically the upper/lower position of a magnetic tape during running, to eliminate the deterioration in the recording and reproducing performance while keeping stable running and to reduce damages to the magnetic tape by providing a means supporting an impedance roller at the center in the height direction in a way of capable of tilting vertically. CONSTITUTION:A couple of support pins 26 are fixed to the upper tip of both support metals 23, inserted to each ear piece 24c and supports a holding metallic fixture 24 freely turnably so that the impedance roller is tilted at the center in the height direction around both sides of the shaft center. An engaging slot 26a is provided to the support pin 26, a regulation projection 24e whose width is narrowered by the engaging slot 24c through a latch hole 24d of the eye piece 24c is fitted to the engaging slot 26a. Thus, the tilted turning of the holding metallic fixture 24 is regulated within a prescribed range and the slope of the impedance roller 15 is regulated in a range from which the magnetic tape 4 is not removed. When the magnetic tape 4 is run, a reaction is given to the impedance roller 15.</p> |
