PROBLEM TO BE SOLVED: To provide a fluid control device of an endoscope capable of quickly preventing residual fluid from dropping from a tip opening when fluid circulation in a tube is cut off.SOLUTION: A movable valve mechanism 45 is provided, which is equipped with a valve body 56 for holding a part of a fluid sending tube 23 from the outside, maintaining the lumen of the fluid sending tube 23 in a predetermined shape when pressurized fluid is flowing, and, when the flow of the pressurized fluid is cut off, deforming the lumen of the fluid sending tube 23 so as to reduce the fluid pressure on the downstream side of the cut-off region. A lumen holding part 28 is also provided for preventing the lumen of the fluid sending tube 23 from being deformed on the downstream side of the middle part deformed by the valve body 56.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】チューブ内の流体の流通を遮断した際に、残留した流体が先端開口部から滴下することを速やかに防止することができる内視鏡の流体制御装置を提供する。【解決手段】送液チューブ23の一部を外部から保持し、加圧流体が流れているときは送液チューブ23の内腔を所定の形状に維持し、加圧流体の流れが遮断されたときに遮断された部位よりも下流側の流体圧力を減圧するように送液チューブ23の内腔を変形させる弁体56を備えた移動弁機構45を設けるとともに、弁体56によって変形される中途部よりも下流側に送液チューブ23の内腔の変形を防止するための内腔保持部28を設ける。【選択図】図4
