BENDING TUBE FOR ENDOSCOPE, ENDOSCOPE AND METHOD FOR MANUFACTURING BENDING TUBE FOR ENDOSCOPE

摘要

A bending tube for an endoscope, which is provided inside a bending portion of an insertion portion of an endoscope and includes a plurality of bending pieces covered by a flexible tube body, the bending tube including a distalmost end bending piece connected to a distal end portion of an insertion portion, a proximalmost end bending piece connected to a flexible tube portion of the insertion portion, and a net-like tube covering an outer periphery of the plurality of bending pieces except the distalmost end bending piece and the proximalmost end bending piece and including a distal end part fixed to a first bending piece joined to the distalmost end bending piece and a proximal end part fixed to a second bending piece joined to the proximalmost end bending piece.

主权项

1. A bending tube for an endoscope, the bending tube being provided inside a bending portion of an insertion portion of an endoscope and including a plurality of bending pieces pivotally joined to one another and covered by a soft outer covering, the bending tube comprising:
among the plurality of bending pieces, a distalmost end bending piece connected to a distal end portion of the insertion portion; among the plurality of bending pieces, a proximalmost end bending piece connected to a flexible tube portion of the insertion portion; a first bending piece including a distal end part pivotally joined to the distalmost end bending piece, the first bending piece having an outer diameter smaller than an outer diameter of the distalmost end bending piece; a second bending piece including a proximal end part pivotally joined to the proximalmost end bending piece, the second bending piece having an outer diameter smaller than an outer diameter of the proximalmost end bending piece; and a net-like tube covering the plurality of bending pieces except the distalmost end bending piece and the proximalmost end bending piece, the net-like tube including a distal end part and a proximal end part fixed to an outer peripheral face of the first bending piece and an outer peripheral face of the second bending piece, respectively.