Endoscope cover and endoscope system

Abstract

The present invention provides an endoscope-used shield and an endoscope system, capable of reliably fixing a front end part of an endoscope-used air bag arranged on an insertion part of an endoscope through the endoscope-used shield and capable of achieving good endoscope observation without generation of vignetting. The endoscope-used shield (200) is assembled to a front end portion (44) of an insertion part (12) of an endoscope for use, and is used for fixing a front end port (60A) of a first air bag (60) arranged on the insertion part (12). The endoscope-used shield (200) comprises: a shield part (206) protruding from a front end face (45) of the front end portion (44) of the insertion part (12); and a cylindrical fixed part (208) which is arranged at the basal end side of the shield part (206) and is assembled on the front end portion (44) of the insertion part (12), wherein the shield part and the fixed part are formed by elastic materials, the peripheral wall of the fixed part has the constant thickness along the axial direction, and the fixed part has a diameter expanding part (210) of which the internal diameter increases towards the shield part side.

Description

technical field [0001] The present invention relates to an endoscope cover and an endoscope system which are mounted on a distal end portion of an insertion portion of an endoscope and used. Background technique [0002] When the insertion part of the endoscope is inserted into the deep digestive canal such as the small intestine, if the insertion part is simply pressed in, the complex curvature of the intestinal tube makes it difficult to transmit force to the front end of the insertion part, making deep insertion difficult. For example, when the insertion part is excessively bent or deflected, the insertion part cannot be inserted further into the deep part. Therefore, a method has been proposed in which an insertion aid is wrapped around an insertion aid of an endoscope and inserted into a body cavity, and the insertion aid is used to guide the insertion part to prevent unnecessary bending and bending of the insertion part. [0003] For example, in Patent Document 1, the...

AI Technical Summary

Problems solved by technology

[0011] However, when such an endoscope cover is mounted on the front end of the insertion part, since the elastic restoring force of the endoscope cover itself generates a force to reduce the diameter, as in Figure 14 As shown, in the cover 900 for endoscope, the cover portion 908 protruding forward from the front end surface 906 of the front end portion 904 of the insertion portion 902 shrinks radially inward.

Furthermore, when the reduced diameter of the cover portion 908 of the endoscope cover 900 is large, a so-called vignetting in which a part of the endoscope cover 900 is reflected in the peripheral portion of the endoscope image may occur, which may Can cause obstacles to endoscopic observation

[0012] In addition, when the front end portion of the endoscope cover shrinks in diameter, the resultant force having a component force toward the front end acts on the endoscope cover, so that the endoscope cover is easy to fall off from the front end portion of the insertion portion, and The problem that the distal end of the endoscope balloon cannot be fixed sufficiently

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