| 摘要 |
PROBLEM TO BE SOLVED: To provide a bending part structure for an endoscope by which a bending operation is smoothly performed. SOLUTION: The structure includes: a bending part wherein a plurality of nodal rings arranged in the axial direction and having a nearly circular cross section, are pivotally supported by rivets which are facing in the radial direction and arrayed in the axial direction, so as to be bendable; each bending operation wire to make a pair, whose tip end is fixed to a hard tip part fixed to the end of the bending part, and also which is inserted to the bending part; and each wire guide to make a pair, which is arranged at a position for offset with respect to a surface orthogonally crossed with a surface on which axially arrayed rivets are connected, on the inner surface of the bending part, and also which guides each one of the bending operation wires to make the pair. The wire guides to make the pair are arranged in every prescribed number of nodal rings among a plurality of the nodal rings. Restricting parts for restricting the movement of the bending operation wire toward the side of the surface orthogonally crossed with the surface connecting the rivets are disposed at least a part of the nodal rings without the wire guides. COPYRIGHT: (C)2004,JPO&NCIPI
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