Fluid pipeline switching device and endoscope

Abstract

The present invention provides a fluid pipeline switching device. In the fluid pipeline switching device for an endoscope, when a piston is detached, contact between the filter and connecting holes formed on an operating cylinder can be prevented, thereby preventing filler damage. The fluid pipeline switching device is provided with the following components: a press button which is provided with a piston and a plurality of sealing components; the operating cylinder which gradually necks in an insertion direction of the piston and is provided with the connecting holes connected with the fluid pipeline; and a limiting member which is used for limiting the lower position of the piston. The plurality of sealing components gradually thins to the front end and separates the space in the operating cylinder along the axis direction. The diameter of the sealing component is smaller than the inner diameter of the upper segment of the segment of the piston, which is in slidable contact with the sealing component. Furthermore the positions of the connecting holes for connecting each fluid pipeline with the operating cylinder are closer to the front end than the lower-end position of the sealing components which slidably contact with corresponding components, thereby settling the task of the invention.

Description

technical field [0001] The present invention relates to a fluid pipeline switching device used for an air supply / water supply button of an endoscope and an endoscope using the fluid pipeline switching device. Background technique [0002] As is well known, endoscopes are inserted into living bodies such as human bodies to diagnose and inspect internal organs. [0003] An endoscope is basically composed of an insertion part inserted into the human body, an operation part for operating the insertion part or an endoscope operation such as air supply / water supply, and a connector (LG (Light Guide) connector), and a universal cord (LG soft part) that connects the connector, the operation part, and the insertion part. [0004] In addition, the insertion part has: a front end part in which an imaging unit having a CCD sensor or an illumination lens, etc. are incorporated; an elongated flexible part on the base end side; The operation of the operating part to bend the steering par...

AI Technical Summary

Problems solved by technology

[0020] In an endoscope device, since the piston is frequently attached and detached, when the piston is attached and detached for cleaning the endoscope, when the packing comes into contact with the connection hole formed on the inner diameter of the cylinder, the Additional damage to the packing, resulting in a decrease in sealing performance or breakage of the packing, which may prevent proper piping switching

[0021] However, when attaching and detaching the piston, it is not considered that the packing contacts the connection hole formed on the cylinder.

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