JPS6015524Y2 - Endoscope - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an endoscope with an improved jet nozzle provided in the distal end component.

Generally, an endoscope has an observation window and an illumination window in its distal end component, and emits illumination light from the illumination window to illuminate the inside of the body cavity.
The illuminated field of view is observed through an observation window.

However, if mucus or dirt from the body cavity adheres to the surface of the observation window, the field of view is obstructed, making observation difficult.

Therefore, a jet nozzle is provided near the observation window toward the outer surface of the observation window, and cleaning water and gas are sprayed onto the observation window as necessary to clean it.

By the way, the above-mentioned jet nozzle is provided to protrude from the outer surface of the tip component, and when water droplets land on the outer surface of the jet nozzle, the illumination light is reflected in the field of view and glares, and the water droplets The light itself sometimes appeared to shine within the field of vision, which sometimes interfered with visual observation.

The present invention was developed in view of the above circumstances, and its purpose is to provide an endoscope that can ensure a good observation field by preventing the formation of perfectly spherical water droplets on the outer surface of the jet nozzle. It's about doing.

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

Reference numeral 1 in FIG. 1 is an insertion section of a direct viewing endoscope, and a distal end component 2 is provided at the distal end of this insertion section 1. As shown in FIG.

The distal end face 3 of the distal end component 2 is provided with an observation window 5 and an illumination window 6 each having cover glasses 4a and 4b attached thereto.

An objective lens 7 is installed inside the observation window 5 and is optically connected to the tip of the image guide fiber 8.

An illumination light guide 9 is guided inside the illumination window 6.

The illumination light guided through the illumination light guide 9 exits from the illumination window 6 and illuminates the visual field within the body cavity.

Further, the area within the illuminated field of view can be observed through the observation window 5.

On the other hand, an ejection nozzle 10 is provided on the distal end face 3 of the distal end forming portion 2 and protrudes from the observation window 5 .

Further, this jet nozzle 10 opens toward the outer surface of the observation window 5, and the air and water supply pipe 1 inserted into the insertion section 1
1 is connected in communication.

Then, cleaning water is first supplied through the air and water pipe 11,
By spraying air from the jet nozzle 10 onto the outer surface of the observation window 5, and then supplying air through the same air and water pipe 11, water droplets remaining on the outer surface of the observation window 5 can be blown away.

Further, the front outer surface 12 of the jet nozzle 10 is formed as a non-slip surface 13 to prevent water droplets from adhering to it.

This non-smooth surface 13 is formed, for example, in the form of a fine-grained surface, as shown in FIG.

Alternatively, it may be formed as shown in FIG. 3 or 4.

In other words, Fig. 3 shows a large number of vertical grooves 14, and Fig. 4 shows small depressions 15...
・A large number of these are distributed and provided.

Note that when the grooves are formed, they may be formed in a horizontal direction or in a lattice shape.

A hood 16 is attached to the outer periphery of the tip component 2.

Since the non-smooth surface 13 is formed on the outer surface 12 of the jet nozzle 10, it is possible to prevent water droplets from adhering to the outer surface 12 in a perfect spherical shape.

In other words, since the surface tension between the water droplets and the outer surface 12 (the force with which the outer surface 12 pulls the water droplets) is greater than the surface tension of the water itself, the water droplets do not become perfectly spherical (bead-shaped), but are dispersed and flattened. become.

Therefore, even if a water droplet adheres, its protrusion length is small.

Therefore, good observation can be ensured by the reflected light and scattered light of the illumination light by the water droplets 17.

In the above-described embodiment, the front outer surface 12 of the jet nozzle 10 is particularly made of a non-smooth surface 13, but the present invention is not limited to this, and may be formed on the entire outer surface exposed to the outside.

As explained above, according to the present invention, it is possible to prevent spherical water droplets from forming on the outer surface of the jet nozzle.

Therefore, the reflected light from the water droplets or the water droplets themselves do not appear to shine within the field of view, and a good observation field can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the tip component showing an embodiment of the present invention;
2 to 4 are perspective views showing ejection nozzles in different embodiments, respectively. 2...Tip component, 5...Observation window, 6
...Illumination window, 10...Blowout nozzle, 1
2...Outer surface, 13...Non-smooth surface, 14...
... groove, 15 ... dent.

Claims (1)

[Scope of utility model registration request] In an endoscope in which a distal end component is provided with an ejection nozzle facing an observation window, the ejection nozzle is located near the observation window and protrudes from the distal end surface of the distal end component, and the outer surface of the ejection nozzle is located near the observation window. An endoscope characterized in that the endoscope has a non-smooth surface that prevents water droplets from adhering to a perfect spherical shape.