Observation window cleaning device for endoscope

摘要

A cleaning device for cleaning an observation window ( 25 ) installed to an insertion section ( 2 ) of a rigid endoscope ( 1 ) is equipped with a nozzle ( 21 ) to spray selectively cleaning liquid and a pressurized CO₂ gas against the observation window ( 25 ), internal conduits ( 23, 24 ) through which the cleaning liquid and the CO₂ gas are supplied to the nozzle ( 21 ) and external conduits ( 90,30; 40 ) detachably connected to the internal conduits ( 23, 24 ), respectively, so as to distribute the cleaning liquid and the CO₂ gas into the internal conduits ( 23, 24 ), respectively, from a liquid container ( 60 ) and a gas container ( 89 ) respectively. The gas supply external conduit ( 40 ) has a flow path diameter smaller than the liquid supply external conduit ( 30 ).