ENDOSCOPE
First Claim
1. An endoscope comprising:
- a flat surface which is provided at a distal end of an inserter to be inserted into a subject and is approximately perpendicular to the axial direction of said inserter;
an observation window which is positioned on said flat surface and has a surface as a light entrance surface being protruded a certain height from said flat surface;
a fluid injection nozzle which is positioned on said flat surface and injects fluid toward said observation window;
a first inclined plane which is disposed around at least a part of the periphery of said observation window facing said fluid injection nozzle and inclines such that whose height gradually decreases from the periphery of said observation window toward outside; and
a back-flow prevention member which is provided on the counter side from said fluid injection nozzle across said observation window so as to prevent that fluid injected from said fluid injection nozzle and passed the surface of said observation window flows backwardly from said flat surface toward the surface of said observation window.
1 Assignment
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Accused Products
Abstract
On a head section connected to a distal end of an inserter of an endoscope, an air/water nozzle, an observation window and a ring projection are provided. On the ring projection, a first inclined plane and a vertical plane are formed. The first inclined plane inclines such that the outer diameter thereof gradually decreases from the top surface of the observation window toward a flat surface. The vertical plane is positioned at the counter side from the air/water nozzle across the observation window. Fluid injected from the air/water nozzle hits the first inclined plane and spreads to pass over the observation window. The vertical plane stops backflow of a water drop on the flat surface toward the observation window, so as to prevent that the water drop reaches on the top surface of the observation window.
69 Citations
17 Claims
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1. An endoscope comprising:
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a flat surface which is provided at a distal end of an inserter to be inserted into a subject and is approximately perpendicular to the axial direction of said inserter; an observation window which is positioned on said flat surface and has a surface as a light entrance surface being protruded a certain height from said flat surface; a fluid injection nozzle which is positioned on said flat surface and injects fluid toward said observation window; a first inclined plane which is disposed around at least a part of the periphery of said observation window facing said fluid injection nozzle and inclines such that whose height gradually decreases from the periphery of said observation window toward outside; and a back-flow prevention member which is provided on the counter side from said fluid injection nozzle across said observation window so as to prevent that fluid injected from said fluid injection nozzle and passed the surface of said observation window flows backwardly from said flat surface toward the surface of said observation window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification