| 摘要 |
PURPOSE:To improve the durability of a sheath material by adding a solid lubricant to the sheath material of a flexible tube in an insertion part. CONSTITUTION:An endoscope 1 consists of an operation part 2, an insertion part 3, and a light guide cord 4, and the operation part 2 is provided with an eyepiece part 5 and a bending operation body 6. The insertion part 1 has the tip part connected to the tip of a flexible tube 7 in the base side through a bending tube 8, and operation wires 10 and 10 inserted to the insertion part 3 are pushed or pulled by the bending operation body 6 of the operation part 2 to bend the bending tube 8. The flexible tube 7 has a flex 12 as a core which is obtained by winding spirally a band-shaped plate 11 which consists of a metal such as stainless steel and is thin and long, and a braid 13 is fitted to the outside circumference of this flex 12, and a sheath material 14 is fitted to the outside circumference of the braid 13. A solid lubricant is added to the sheath material 14 for the purpose of giving lubricity to it. |
