| 摘要 |
PURPOSE: To form a curved part of comparatively simple and inexpensive structure, to increase the bowing force of the curved part and to improve bowing operability by providing a bias member, a bowing operating wire and plural lump wheels for curved part. CONSTITUTION: The curved parts 15, 16 are provided at two places in the longitudinal direction of an arm part 10 protruding over a sheath 9 on its midway in right and left clamp forceps 7a, 7b. The curved parts 15, 16 are formed in such a way that the plural lump wheels 27 formed nearly cylindrically are arranged in a line in an axial direction in coaxial fashion, and a projecting part 28 whose cross-section is formed in circular arc shape is formed on one end face of each lump wheel 27, and a circular arc shape recessed part 29 on the other end face. Also, plural holes 45 are provided on each lump wheel 27 in its axial direction, and the bias member 46, a treating kit operating wire 47, the bowing operating wire 48 and a lead wire 26, etc., are inserted through the holes in parallel with the center axes L1 of the curved parts 15, 16. |
