| 摘要 |
<p>PURPOSE:To suppress tape vibration and the ununiformity of head revolution by causing the outer circumferencial surface of upper and lower fixed cylinders to be smaller than a half cylinder, providing the linking part of the upper and lower cylinders in a position besides a tape coiling part and causing the edge of the coiling part to be a plain surface to contact with the outer circumferencial surface or a projecting shape curve surface, etc. CONSTITUTION:An outer circumferencial member 2 is caused to be smaller than the half cylinder and a lower fixed cylinder 2a, an upper fixed cylinder 2b, an interval 2e, through which a magnetic head 7 is passed, a linking part 2c of the upper and lower cylinders 2a and 2b and leads 2f and 2d, which controls the upper and lower side positions of a magnetic tape 20, are molded into one body. The upper and lower cylinder linking part 2c is provided near the both sides of a coiling part 23 of the tape 20 and the part 2c is caused to be the plain surface, which contacts with the outer circumferencial surface in the edge part of the coiling part 23, the projecting curved surface or a curved surface group to obtain these surfaces as an enveloping surface. Thus, the outer circumferencial surface to be larger than the half cylinder of the upper and lower cylinders is erased and the title device is caused to be light. Then, for the tape to be separated from the coiling part, the vibration of the tape is prevented by the curved surface group of the linking part 2c and the ununiformity of the tape revolution is suppressed. Then, performance can be improved.</p> |
