Patent ID: 8727968
Filing Date: 2014-05-20
Classification: A61B

Abstract:
1. A medical treatment endoscope comprising: an endoscope main body which includes an elongated insertion portion having an arm-inserted lumen and an image capturing mechanism disposed in a distal end of the insertion portion; an arm bending part which is provided so as to protrude or retract freely from the arm-inserted lumen, has a treatment tool lumen for allowing an endoscope treatment tool to be inserted therethrough and is capable of bending freely; and a positioning mechanism which positions the arm bending part in the state of protruding from the arm-inserted lumen with respect to the endoscope main body; and an operating portion which operates so as to bend the arm bending part, wherein the positioning mechanism includes an engaging member which is provided at a proximal end of the arm bending part, and an engaged member which is provided at an inner wall of a distal end of the arm-inserted lumen and engages with the engaging member at a position where the arm bending part protrudes from an opening of the arm-inserted lumen in at least one of a circumference direction and an axial direction, wherein the member includes: a first stopper which freely protrudes from an retracts into an outer peripheral surface of an arm and is connected to the arm, and a second stopper which freely protrudes or retracts from the outer peripheral surface of the arm and is connected to the arm at a position that faces the first stopper in a radial direction of the arm,