ENDOSCOPIC FLUID PASSAGE CHANGEOVER VALVE UNIT AND ENDOSCOPE

摘要

In an endoscopic fluid passage changeover valve unit, a communication passage is formed in a shaft, the communication passage being opened to a hollow portion of a cylinder portion in an inside opening located on an outer peripheral surface of the shaft, and a seal member is provided at an angular position apart from the inside opening in circumferential directions of the cylinder portion. The shaft and the seal member are rotatable relative to the cylinder portion around a movement axis toward a position where a first upstream-side fluid passage is blocked by the seal member and toward a position where the inside opening of the communication passage faces the first upstream-side fluid passage.

主权项

1. An endoscopic fluid passage changeover valve unit comprising:
a cylinder portion having a hollow portion formed therein; a first upstream-side fluid passage which has a downstream end thereof located on an inner peripheral surface of the cylinder portion, and which is configured to supply a first fluid to the hollow portion from the downstream end; a shaft which extends along a movement axis to be inserted into the hollow portion, and inside which a communication passage is formed, the communication passage being opened to an outside of the cylinder portion through an opening and being also opened to the hollow portion in an inside opening located on an outer peripheral surface of the shaft; a first seal member which is provided on the outer peripheral surface of the shaft rotatably around the movement axis, and which is located at an angular position apart from the inside opening in circumferential directions of the cylinder portion; and a second seal member which attaches the shaft to the cylinder portion so that the shaft and the first seal member are rotatable relative to the cylinder portion around the movement axis toward a position where the downstream end of the first upstream-side fluid passage is blocked by the first seal member and toward a position where the inside opening of the communication passage faces the downstream end of the first upstream-side fluid passage.