JPS646803Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an air and water supply device for an endoscope.

FIG. 1 is a diagram showing an example of a general endoscope.
In the figure, 1 is the distal end of the endoscope, 2 is the insertion tube section inserted into the body cavity, 3 is the operation section for bending the insertion tube section, etc., and 4 is the eyepiece section for observing the subject. . When observing the inside of a body cavity using an endoscope, an objective lens (not shown) provided at the distal end 1 captures an image of the examined area.
An image is formed on the end face of an optical fiber bundle (not shown) housed in the insertion tube section 2, and the image is transmitted to the eyepiece section 4 through the optical fiber bundle, and an eyepiece lens (not shown) provided in the eyepiece section 4 is formed. (not shown) to observe the image.

When observing the inside of the digestive organs such as the stomach and large intestine using an endoscope, when inserting the endoscope or swinging the endoscope within the body cavity, the distal end 1 of the endoscope may be inserted into the body cavity. dirt, mucus, etc. in the body cavity may adhere to the cover glass (not shown in FIG. 1) of the objective lens provided at the distal end 1, which may impede observation. Therefore, for the purpose of cleaning and removing the dirt, bleeding, and other deposits and ensuring the visibility of the objective lens,
The endoscope is provided with an air and water supply device that sprays fluid such as air or water toward the cover glass to clean the cover glass. The air and water supply device is
It consists of nozzles 5 and 6 provided on the distal end 1, tubes 7 and 8 inserted into the insertion tube section 2, and an air/water supply operating section 9 provided on the operation section 3. It is constructed by connecting tubes 10 and 11 from a tank and a pump (not shown) for pneumatic water supply to the operating section 9.

This air and water supply device is also used to blow off the cleaning water adhering to the cover glass by the water supply and washing, and to dry the cover glass.

This air and water supply device is also used when observing the inside of a body cavity using an endoscope, when the organ in which the examined part is located is narrow and the examined part and the observation window are too close to each other, which interferes with the observation. The air is sent to the distal end 1 by the air tube 7 and ejected from the air nozzle 5 into the organ to inflate the organ, and a distance necessary for observation is established between the object to be examined and the observation window. It is also used to secure the

When an organ is expanded and observed by such air supply, the pressure inside the body cavity becomes higher than atmospheric pressure due to the expansion, and when the air supply is stopped, the distal end 1 absorbs gastric fluid glue, etc. When the patient is immersed in mucus that has accumulated in the body cavity, the mucus in the body cavity, such as gastric juice, may flow back into the air supply tube 7. Further, even if the pressure inside the body cavity is the same as atmospheric pressure, the mucus may infiltrate into the air supply tube 7 due to capillary action. In addition, dirt in the body cavity or a contrast medium injected for X-ray imaging may enter the air supply tube 7. Although it is possible to discharge some of the mucus that has entered in this way from the air supply nozzle 5 by supplying air, it is not possible to completely discharge the mucus that has adhered to the inner wall of the air supply tube 7, and after the test is completed, If the endoscope is hung on a hanger or the like, residual mucus may gradually accumulate on the air nozzle 5, solidify in that state, and block the air nozzle 5.

In addition, in recent years, it has been desired to widen the field of view of endoscopes, but in response to such demands, endoscopes with wide angles inevitably have larger diameter objective lenses, which means that the diameter of the cover glass has to be increased. Since the diameter is also large, it has been difficult for conventional water supply devices to supply and clean the entire surface with water.

This invention was made to solve the above-mentioned problems, and it is possible to clean the inside of the air tube with water and also to clean the cover glass over a wide area. The present invention provides a mirror air and water supply device.

Hereinafter, according to the preferred embodiment shown in the attached drawings,
The present invention will be explained in detail.

FIG. 2 is a front view showing the tip of an embodiment of the present invention, and FIG. 3 is a longitudinal sectional side view of the tip developed along line A-B-C-D in FIG. In the figure, 1 is the distal end of the endoscope, 2 is the insertion tube, 5 is the air nozzle, 6 is the water nozzle, 7 is the air tube, and 8 is the water tube.

When observing the inside of a body cavity with an endoscope, the cover glass 12 and objective lens 13 provided at the distal end 1 form an image of the examined region on the end surface of the optical fiber bundle 14 housed in the insertion tube section 2. The image is transferred to the optical fiber bundle 14
The image is transmitted to the eyepiece section 4 through the eyepiece section 4, and the image is observed through an eyepiece lens (not shown) provided in the eyepiece section 4.

At the tip 1, there is an air nozzle 5 that opens toward the cover glass 12 and a water nozzle 6.
(not shown in the figure), the operating section 3 is provided with an actuating section 9, and the insertion tube section 2 is provided with nozzles 5, 6.
It houses an air supply tube 7 and a water supply tube 8 that communicate with the operating section 9, respectively, and is provided with a pump (not shown) and a tank (not shown) separately from the endoscope. It communicates with the operating section 9 through an air pipe 10 and a water pipe 11. As a feature of this embodiment,
The air supply system and the water supply system are communicated by a communication passage 15 at the rear of both nozzle openings in the tip portion 1 near the nozzles 5 and 6 (on the air and water supply side).

In addition, in the figure, 16 is a cover glass for an optical fiber bundle for illumination, and 17 is a forceps opening for inserting forceps.

According to the air and water supply device for an endoscope having the above-described configuration, during air supply, the air pressurized and supplied by the pump passes through the air supply pipe 10, the operating section 9, and the air supply tube 7 to the tip. It reaches part 1 and branches into two parts at the tip part 1, one part is ejected from the air nozzle 5 toward the cover glass 12, and the other part is ejected from the communication path 1.
5 and is ejected from the water nozzle 6 toward the cover glass 12.

Similarly, during water supply, the water supplied under pressure by the pump passes through the water supply pipe 11, the actuating part 9 and the water supply tube 8, reaches the tip 1, and branches into two at the tip 1, One side is ejected from the water nozzle 6 toward the cover glass 12, and the other side is ejected from the air nozzle 5 to the cover glass 1 through the communication path 15.
It is ejected towards 2.

According to the air and water supply device for an endoscope according to the present invention,
The air supply system and the water supply system are connected behind both nozzle openings in the tip of the endoscope, so even if one nozzle is clogged with dirt, air or water can be supplied from the other nozzle. Therefore, the observation is not interrupted by the occlusion. Furthermore, since the air supply nozzle is flushed during water supply, it is extremely effective in preventing blockage of the system due to adhesion of mucus and the like. In addition, since water can be sent to the cover glass from two nozzles at all times, it is possible to sufficiently wash the entire surface of a large cover glass such as a wide-angle endoscope. Therefore, a clear observation image can always be obtained, and accurate diagnosis can be made in a short time.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a general endoscope, Fig. 2 is a front view showing the distal end of an embodiment of the present invention, and Fig. 3 is a plan view showing a general endoscope.
The figure is a longitudinal sectional side view showing the developed embodiment of FIG. 2. DESCRIPTION OF SYMBOLS 1...Tip part, 2...Insertion tube part, 3...Operation part, 5...Air supply nozzle, 6...Water supply nozzle, 7...
... Air supply tube, 8 ... Water supply tube, 9 ... Air and water supply operation section, 10 ... Air pipe, 11 ... Water pipe, 12 ... Cover glass, 13 ... Objective lens, 15 ... Communication path.

Claims (1)

[Scope of Claim for Utility Model Registration] An air supply nozzle provided at the tip of the endoscope and a water supply nozzle having an opening separate from the opening of this air supply nozzle, each provided in the endoscope operating section by a tube. An air and water supply device that is connected to an operating part for air and water supply, and the operating part and a tank and pump for air and water supply are connected by pipes, and the above-mentioned system for water supply and air supply An air and water supply device for an endoscope, characterized in that a system for the system is communicated with the system behind both nozzle openings in the distal end of the endoscope.