Patent ID: 9173555
Filing Date: 2015-11-03
Classification: A61B

Abstract:
1. An endoscope comprising: a distal end part having a flat end surface and a round-chamfered outer peripheral edge; an observation window base part formed on the flat end surface of the distal end part so as to protrude distally from the flat end surface; an observation window placed on the observation window base part; and a nozzle which jets a cleaning fluid toward the observation window, wherein: the observation window base part has an outer peripheral shape formed into a streamline shape with respect to a flow of the cleaning fluid jetted from the nozzle, the observation window base part is located on the distal end part such that a periphery portion of the observation window base part extends up to the outer peripheral edge of the distal end part along the flow of the cleaning fluid jetted from the nozzle, and the outer peripheral shape of the observation window base part decreases linearly in width from the observation window to the outer peripheral edge of the distal end part in a direction of flow of the cleaning fluid.