| 摘要 |
<p>PURPOSE:To generate no excessive tension, bend, twist nor tangle in an optical cord by placing coaxially at prescribed intervals plural rotatable disks on the outside circumference of a steering shaft, and fixing an optical fiber cord whose one end rotates together with the steering shaft, to said disk so that a sag is generated between each disk. CONSTITUTION:When a constant tension is applied to a cord 6 as a handle rotates, between a fixing part of the handle side of an optical cord 6 and a fixing part of a disk 5(n) side being nearest said fixing part, the disk 5(n) rotates in the drawn direction, a further tension increase, a bend and a twist of the optical cord are prevented, also, in case when a rotational angle of the handle is large and a length of the cord is short by only a sag portion between the disk 5(n) and 5(n1), a constant tension of the cord between both the disks is applied, therefore, the disk 5(n1) rotates, a length shortage of the cord is compensated, and in the same way, all the disks rotate successively, therefore, it does not occur that an excessive tension, a bend exceeding an allowable value, and a twist are not applied to the optical cord.</p> |
