PIPELINE SWITCHING OPERATION MECHANISM FOR ENDOSCOPE

摘要

PROBLEM TO BE SOLVED: To provide a sanitary pipeline switching operation mechanism of an endoscope with the excellent water discharge property of a space part where a spring is arranged and excellent washability. SOLUTION: A spring receiving part 20d is formed from an annularly formed outer edge part to an inner part at a fixed member 20, the inner side part is formed into the size for loosely passing through a connection member 18 and incapable of passing through a piston 11 and a part of the inner end wall is formed into a shape notched larger than the outer diameter of the piston.