| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hardness adjusting means within an insertion part without increasing the diameter of the insertion part and to prevent the position of a hardness adjusting wire from being shifting the peripheral direction. SOLUTION: The hardness adjusting wire 51 is provided extending from the insertion part to an operation part 3, and a coil spring 53 arranged in the operation part is connected to this hardness adjusting wire to provide the hardness adjusting means for adjusting the hardness of the insertion part by varying the tension of the hardness adjusting wire by extending and contracting this coil spring. A positional deviation preventing means such as a squeezed part for putting the hardness adjusting wire, e.g. through is provided at the inside spiral tube of the insertion part.</p> |
