Curvable part device for endoscope devices

In an endoscope device formed of at least one of an endoscope having an elongated insertion part capable of being inserted into a pipe cavity or body cavity and containing an observing means within said insertion part and an endoscope insertion auxiliary used to lead the insertion part of said endoscope to an object position and forming an elongated hollow insertion part through which said insertion part can be inserted, a curvable part device for said endoscope device comprising:

• a plurality of substantially ring-shaped knot rings formed on the tip side of the insertion part and arranged along the longitudinal direction of said insertion part;
• pivoting members jointing said respective knot rings at the ends rotatably with each other;
• pairs of curving wires passed inside the respective knot rings and fixed at the ends to the knot ring in the foremost step or to a member to which said knot ring is fixed;
• a curving operation mechanism to which said curving wires are fixed at the other ends so that, by the rotating operation, one of said curving wires may be relaxed and the other may be pulled to curve the jointed knot rings;
• wire receiving members fixed to the inner peripheral sides of said knot rings and each provided with a wire inserting hole guiding said curving wire so as to be free to advance and retreat;
• and
• wire receiver fixing mechanisms wherein said wire receiving members are engaged partly and fixed in respective incisions formed in said knot rings to reduce the amount of the projection of the respective wire receiving members projecting radially inside from the inner peripheral surfaces of the knot rings.