Endoscope
First Claim
1. An endoscope, comprising:
- a first flat surface formed at a distal end portion of an insertion part to be inserted into a subject, and is orthogonal to an axial direction of the insertion part;
an observation window allowing image light of the subject to be taken therethrough, provided at the distal end portion with a surface of the observation window as a light incidence plane protruding from the first flat surface in a predetermined height;
a pair of illumination windows provided at the distal end portion to irradiate a subject with illumination light;
a fluid jetting nozzle arranged at the first flat surface to jet a fluid toward the observation window;
an inclined surface formed around the observation window and arranged at a position that faces the fluid jetting nozzle; and
a fluid guide surface formed continuously with the inclined surface to guide a fluid to the illumination window,wherein the pair of illumination windows are positioned on the first flat surface and in a side of an intersection part of the first flat surface and the fluid guide surface, such that a shortest distance between a center of each of the pair of illumination windows and the intersection part is less than a shortest distance between the center of said each of the pair of illumination windows and a perimeter of the first flat surface.
1 Assignment
0 Petitions
Accused Products
Abstract
A distal end portion successively provided from an insertion part distal end of an endoscope is provided with an air supply and water supply nozzle, an observation window, and illumination windows, and are formed with mutually parallel first and second flat surfaces. The surface of the observation window is disposed at the same position as the second flat surface. An inclined surface that connects the first flat surface and the second flat surface together is formed at a position that faces the air supply and water supply nozzle. Fluid guide surfaces are formed on both sides of the inclined surface. The fluid guide surfaces incline toward the illumination windows. A fluid jetted from the air supply and water supply nozzle impacts against the inclined surface, spreads to the observation window, and is guided to the fluid guide surfaces, and flows to the illumination windows.
7 Citations
20 Claims
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1. An endoscope, comprising:
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a first flat surface formed at a distal end portion of an insertion part to be inserted into a subject, and is orthogonal to an axial direction of the insertion part; an observation window allowing image light of the subject to be taken therethrough, provided at the distal end portion with a surface of the observation window as a light incidence plane protruding from the first flat surface in a predetermined height; a pair of illumination windows provided at the distal end portion to irradiate a subject with illumination light; a fluid jetting nozzle arranged at the first flat surface to jet a fluid toward the observation window; an inclined surface formed around the observation window and arranged at a position that faces the fluid jetting nozzle; and a fluid guide surface formed continuously with the inclined surface to guide a fluid to the illumination window, wherein the pair of illumination windows are positioned on the first flat surface and in a side of an intersection part of the first flat surface and the fluid guide surface, such that a shortest distance between a center of each of the pair of illumination windows and the intersection part is less than a shortest distance between the center of said each of the pair of illumination windows and a perimeter of the first flat surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification