PROBLEM TO BE SOLVED: To obtain a curved part structure of an endoscope insertion part that can fix a coil pipe with sufficient fixed strength without extending an axial direction length of a connecting piece, in the curved part structure of the endoscope insertion part in which an active curved part subjected to curving operation actively by the predetermined operation of the operation part and a passive curved part capable of being passively curved are sequentially provided from an insertion part tip side, the active curved part and the passive curved part are connected through the connecting piece, multiple curving operation wires respectively inserted in a coil pipe extend from a flexible tube to the passive curved part and the active curved part, and the tip part of the coil pipe is fixed to the connecting piece.SOLUTION: A curved part structure of an endoscope insertion part is characterized in that a coil fixing member is fixed in a connecting piece for connecting an active curved part with a driven curved part, and a coil pipe with a bending operation wire inserted thereto is fixed in the coil fixing member.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】挿入部先端側から順に、操作部の所定操作によって能動的に湾曲操作される能動湾曲部と、受動的に湾曲可能な受動湾曲部を有し、能動湾曲部と受動湾曲部は連結駒を介して接続され、コイルパイプ内にそれぞれ挿通された複数の湾曲操作ワイヤが可撓管部から受動湾曲部及び能動湾曲部に延び、コイルパイプの先端部が連結駒に固定されている内視鏡挿入部の湾曲部構造において、連結駒の軸方向長を長くすることなく、コイルパイプを十分な固定強度で固定することができる内視鏡挿入部の湾曲部構造を得る。【解決手段】能動湾曲部と従動湾曲部を連結する連結駒に、コイル固定部材を固定し、該コイル固定部材に、湾曲操作ワイヤを挿通したコイルパイプを固定した内視鏡挿入部の湾曲部構造。【選択図】図2
