JPS5810562Y2 - Endoscope - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an endoscope that selectively supplies cleaning liquid and air to an injection nozzle for cleaning an observation window.

The distal end of an endoscope is inserted into a patient's body cavity, and the inside of the body cavity is observed through an observation window provided at the distal end.

Therefore, if body fluid or blood adheres to the observation window, observation becomes difficult.

Therefore, an injection nozzle for cleaning the observation window is provided in the vicinity of the observation window, and cleaning liquid is sprayed from the nozzle onto the observation window to clean the observation window.

Conventionally, as shown in FIGS. 1 and 2, an observation window 1 is provided at the front of the distal end of a direct-view endoscope, and cleaning water and air are selectively placed near the observation window 1. An injection nozzle 2 that injects water is provided, and a cleaning water supply channel 3 and an air supply channel 4 are provided independently of each other up to the vicinity of the injection nozzle 2. It communicates with the passage 4 and is connected to the injection nozzle 2.

First, cleaning water is injected from the injection nozzle 2 through the water supply channel 3 to clean the observation window 1, and then air is injected from the injection nozzle 2 through the air supply channel 4 to blow away water droplets attached to the observation window 1. I have to.

However, in the above-mentioned conventional device, since the space between the connection part 5 between the water supply channel 3 and the air supply channel 4 and the injection nozzle 2 is used for both water supply and air supply, even after cleaning, the inner peripheral wall 6 is Water droplets are attached.

Therefore, there is a drawback that water droplets on the inner circumferential wall 6 are blown away and attached to the observation window 1 during air supply after water supply, and obstruct observation.

This idea was devised based on the above circumstances, and its purpose was to connect the cleaning liquid feeding path and the air feeding path connected to the injection nozzle in close proximity to the injection nozzle. An endoscope that is arranged in parallel and has one end of the liquid feeding path and one end of the air feeding path opened in the injection nozzle to improve water drainage during air feeding after liquid feeding. This is what we are trying to provide.

Hereinafter, this invention will be explained based on one embodiment shown in the drawings.

11 in Figures 3 to 5 is the tip of the direct-viewing endoscope;
An observation window 12 is provided on the front surface of this tip 11.

Further, a single observation window cleaning injection nozzle 13 is attached to the tip portion 11 located near the observation window 12.

This injection nozzle 13 has a nozzle opening 13b that faces the observation window 12 by cutting diagonally into the side wall of the distal end of a cylindrical body 13a whose distal end face is closed. is injected into the observation window 12.

That is, a liquid feeding path 15 consisting of a liquid feeding pipe and an air feeding path 16 consisting of an air pipe are inserted into the flexible tube 14 connected to the tip 11, and these are connected to the tip communicating with the injection nozzle 13. It is inserted into a through hole 17 bored in 11.

The liquid feeding path 15 and the air feeding path 16 are in close contact with each other in parallel in the vicinity of the injection nozzle 13, and their tips are cut diagonally along the nozzle opening 13b of the injection nozzle 13.

Therefore, the area where water droplets tend to adhere can be minimized.

When the observation window 12 becomes dirty with body fluids or blood in the body cavity, first, the cleaning liquid is supplied to the injection nozzle 13 through the liquid supply path 15, and the cleaning liquid is injected from the nozzle opening 13b to the observation window 12. Clean the area.

When the cleaning is completed, air is supplied to the injection nozzle 13 through the air supply path 16, and the air is injected from the nozzle opening 13b to the observation window 12 to blow off the cleaning liquid adhering to the observation window 12. The window 12 is cleaned so that the inside of the body cavity can be observed.

At this time, water droplets of the cleaning liquid are attached to the inner circumferential surface of the liquid feeding path 15, but since the air feeding path 16 is independently connected to the injection nozzle 13, the air inside the liquid feeding path 15 is Water can be drained well without blowing off water droplets and staining the observation window 12.

In the above embodiment, the pipe forming the liquid feeding path and the pipe forming the air feeding path were placed in parallel and in close contact with each other and inserted into the cylindrical injection nozzle. As shown in FIG. Each pipe 18, 19 may be formed into a semicircular shape by being press-fitted with a diameter smaller than the inner diameter of the pipe.

By intercepting the liquid in this way, it is possible to effectively eject the liquid widely from the inclined nozzle opening 20a provided on the side wall of the tip end of the injection nozzle 20.

Further, FIGS. 8 and 9 show a further different embodiment, in which a partition wall 22 is integrally formed in one pipe 21, a liquid feeding path 23 and an air feeding path 24 are provided, and this pipe 21 is provided with a liquid feeding path 23 and an air feeding path 24. Alternatively, the tip of the jet may be inserted into the injection nozzle 25.

Furthermore, although the above embodiments have been described with respect to a direct-viewing endoscope, it goes without saying that this invention can also be applied to a side-viewing endoscope.

As explained above, this device arranges the cleaning liquid and air supply paths connected to the injection nozzle closely and in parallel near the jet nozzle, and also arranges the cleaning liquid and air supply paths connected to the injection nozzle closely and in parallel. By opening one end of the air passage within the injection nozzle, the area to which water droplets adhere can be extremely shortened.

Therefore, after the cleaning liquid is injected from the injection nozzle through the liquid supply path, water can be drained well when air is injected from the injection nozzle through the air supply path, and the observation window is not clouded with water droplets, making it possible to clean the observation window. This has the effect of being easy to perform.

[Brief explanation of drawings]

1 and 2 are longitudinal cross-sectional views showing the distal end of a conventional endoscope, FIG. 3 is a longitudinal cross-sectional view of the endoscope distal end showing an embodiment of this invention, and FIG. 4 is a longitudinal cross-sectional view showing the distal end of a conventional endoscope. Longitudinal cross-sectional view with enlarged section,
Fig. 5 is a sectional view taken along the line ■-■ in Fig. 4, Fig. 6 is a longitudinal sectional view of the main part showing another embodiment of this invention, and Fig. 7 is a cross-sectional view taken along the line ■-■ in Fig. 6. 8 is a longitudinal sectional view showing still another embodiment of this invention, and FIG. 9 is a sectional view taken along the line N--■ in FIG. 8. 11...Tip part, 12...Observation window, 1
3...Injection nozzle 15...Liquid feeding path,
16...Air supply path.

Claims (1)

[Scope of utility model registration request] An endoscope having an observation window provided at the tip of the endoscope, a single injection nozzle having a nozzle opening facing the observation window, and a cleaning liquid and air selectively supplied to the injection nozzle. What is claimed is: 1. An endoscope, characterized in that the mirror has one end opened within the injection nozzle, and is provided with a liquid feeding path and an air feeding path that are each independently adjacent to each other.