| 摘要 |
<p>PURPOSE:To aim at improvement in rotational deflection accuracy, by setting up first and second elastic members, different in load to be added to each outer ring, between first and second outer rings as well as between third and fourth outer rings applied to a video taper recorder rotating cylinder. CONSTITUTION:Outer rings 4a and 4b situated at both ends to an axial direction are tightly locked to a housing 13 by means of cementing or the like, and other outer rings 4b and 4c are designed so as to be freely moved. And, these outer rings 4a and 4b receive force F1 in an arrow direction by the coil spring 5a installed between both, while outer rings 4c and 4d receive force F2 by a coil spring 5b likewise. Here, supposing force W is added to a shaft 1, if initial preload is given in advance so as to become F1=F+W/2, F2=F-W/2, even if the force W is added to the shaft 1, the specified preload force F is securable, thus high rotational deflection accuracy is secured.</p> |
