Cleaning device for cleaning view window of endoscope

Claim 1

A medical endoscope having an insertion section including a viewing head which is connected to an operating section through a flexible section and includes an illumination system located behind an illumination window, a viewing lens system located behind a viewing window, fluid feed means for feeding at least cleaning fluid to the viewing window, and suction feed means for feeding suction to the viewing head, said medical endoscope comprising: a generally cylindrical viewing head casing for housing said illumination system, said viewing lens system and said fluid feed means therein; a generally annular-shaped viewing head cap detachably fitted to said generally cylindrical viewing head casing, said viewing head cap being formed so as to have a generally cylindrical wall extending a predetermined height from a distal end of said viewing head casing in a lengthwise direction of said insertion section; a fluid feeding nozzle having a fluid injection port through which said cleaning fluid can be fed, said fluid feeding nozzle being formed integrally with said generally annular-shaped viewing head cap and configured to form a fluid path which is brought into communication with said fluid feed means when said generally annular-shaped viewing head cap is fitted to said generally cylindrical viewing head casing and is turned to direct said cleaning fluid through said fluid feed means toward said viewing window; and a drain path opening to a space formed between said cylindrical wall of said generally annular-shaped viewing head cap and said distal end of said viewing head at a distal end and being in communication with said suction feed means a proximal end so that liquid that stays in said space is sucked through said drain path into said suction feed means.