Ultrasound endoscopy

Abstract

The present invention provides an ultrasonic endoscope capable of properly escaping leakage current to a stand to a ground wire when a high-frequency treatment tool or the like is used. The erecting platform (60) arranged at the front end (34) of the ultrasonic endoscope (1) and its driving mechanism are integrally assembled into an erecting platform assembly (72) through conductive parts, and the erecting platform assembly (72) is formed by an insulating The receiving part formed by the front end body (36) is stored and held. The corner ring (front end ring) (250) of the front end of the bending part (32) is fitted on the base end side outer peripheral part of the front end part main body (36), and the front end ring (250) and the stand assembly (72) ( The component body 80) is connected by a conductive screw (270) embedded in the via hole (220). The corner ring is connected to the ground wire (GND), and the leakage current leaked from the treatment tool to the stand (60) is released to the ground wire through the corner ring of the bending part (32).

Description

technical field [0001] The present invention relates to an ultrasonic endoscope, and more particularly to an ultrasonic endoscope including a treatment instrument erecting stand for erecting a treatment instrument derived from a treatment instrument lead-out portion at a distal end portion of an insertion portion. Background technique [0002] Conventionally, in ultrasonic endoscopes, there is known a structure in which an upright stand is provided at the front end of an insertion portion inserted into a body cavity, and the treatment tool passed through the treatment tool insertion channel is inserted from the front end by the upright stand. The treatment tool pulled out by the lead-out unit stands up, and the pulling-out direction of the treatment tool can be adjusted by changing the stand-up angle of the stand (for example, refer to Patent Document 1). [0003] According to the endoscope of Patent Document 1, an erecting stand is provided on the treatment instrument lead-...

AI Technical Summary

Problems solved by technology

[0015] However, since the operating metal wire is thin, the on-resistance is high and current is difficult to flow

Therefore, even if the operation metal wire is electrically connected to the ground of the operation part, the leakage current from the treatment tool may not flow properly to the ground.

[0016] On the other hand, when the operation metal wire is thickened to facilitate the flow of electric current, there is a problem that the diameter of the insertion part becomes thicker.

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