Endoscope with water injection and gas injection selecting button

Abstract

The invention relates to an endoscope with a water injection and gas injection selecting button. The endoscope comprises a control handle, a flexible inserting part, an end executor, an elastic covering piece, a carbon dioxide source and a water source, wherein the flexible inserting part is provided with a gas pipeline and a water flow pipeline, the control handle is provided with a gas passage and a water flow passage, the control handle is provided with the selecting button, the selecting button comprises a fixing sleeve and a valve core, and the valve core is provided with a gas joint, a gas sealing piece, a water flow joint and a water flow sealing piece; when the valve core is positioned in the first position, the gas passage is communicated with the gas joint; when the valve core is positioned in the second position, the gas passage is sealed by the gas sealing piece, and the water flow joint is communicated with the water flow passage; when the valve core is positioned in the third position, the gas passage is sealed by the gas sealing piece, and the water flow passage is sealed by the water flow sealing piece; the top of the valve core is provided with an extending section, a step is formed between the extending section and the valve core, the fixing sleeve is provided with a through hole, the through hole is in clearance fit with the extending section, and the triggering valve of the extending section is switched among three positions. The endoscope has the advantage that the external leakage of carbon dioxide is prevented.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an endoscope. Background technique [0002] As a medical endoscope, the endoscope has an insertion portion inserted into the body of a subject, a main body operation portion continuous with the insertion portion, and a universal cord connected to the main body operation portion. The front end of the insertion part has a lighting window, an observation window and a forceps outlet. In use, the insertion part is inserted into the body cavity of the subject. Then, the inside of the body cavity is observed through the observation window by irradiating illumination light from the illumination window into the body cavity. When an affected part or the like is found, a high-frequency treatment tool or forceps or the like is passed through the forceps channel, thereby treating the affected part with the forceps or the like protruding from the forceps outlet. [0003] Therefore, the en...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the disadvantage that the existing endoscopes cannot avoid the leakage of carbon dioxide, the present invention provides a water injector that can selectively connect the gas supply channel or liquid supply channel of the endoscope, and can prevent the leakage of carbon dioxide. Gas selection button for endoscopes

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