| 摘要 |
PROBLEM TO BE SOLVED: To provide an observation window washing nozzle for an endoscope capable of smoothly washing internal dirty liquid or the like stuck to the surface of an observation window over the entire surface and not easily generating clogging by mucosal fluid and filth or the like. SOLUTION: In the observation window washing nozzle for the endoscope for jetting fluid sent through fluid pipelines 5 and 8 arranged inside the insertion part 1 of the endoscope to the distal end 2 of the insertion part 1 from a distal end opening 4a provided toward the surface of the observation window 3 arranged at the distal end 2 of the insertion part 1, a narrowed part 4b for accelerating the jetting speed of the fluid jetted toward the surface of the observation window 3 to be faster than the moving speed of the fluid inside the fluid pipelines 5 and 8 is formed at a part more at the back than the distal end opening 4a, and the opening cross sectional area of the distal end opening 4a is formed to be larger than the cross sectional area of the narrowed part 4b. COPYRIGHT: (C)2008,JPO&INPIT |
