JP2003153857A - Sub-water supply device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sub-water supply device for an endoscope which can spray various kinds of liquids to a wide range. SOLUTION: This sub-water supply device for the endoscope is provided with a sub-water supply hole 30 for discharging the liquid toward a lesion at the distal end of an internal insertion portion 11 of the endoscope and the above sub-water supply hole is provided with a diffusion nozzle for diffusing the discharge liquid in the form of mist.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an auxiliary water supply device for an endoscope.

[0002]

2. Description of the Related Art In an endoscope, for example, in a clinical examination, a cleaning liquid is ejected from the tip of an insertion portion in the body to remove dirt in the visual field, or a staining liquid is ejected to stain a desired position. There are types that can be done. Such a cleaning liquid or a staining liquid is generally called sub-water supply in order to distinguish it from the liquid sent for cleaning the objective window or the illumination window at the tip of the body insertion part.

The conventional sub-water supply device provided in the endoscope is generally of the DC type in which the sub-water supply is linearly discharged from the sub-water supply hole provided at the tip of the body insertion portion. In such a direct current type, for example, when a stain solution is spread over a wide range, the spray tube may be inserted into a forceps channel of an endoscope to supply the liquid from the spray tube. In this case, although it is possible to stain a wide area by one-time liquid feeding, the observation time becomes longer by the time required for inserting the spray tube, which is not preferable considering the burden on the patient.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sub-water supply device for an endoscope which can spray liquid over a wide range.

[0005]

SUMMARY OF THE INVENTION The present invention is characterized in that the distal end of the endoscope insertion part is
The sub-water supply device for an endoscope having a sub-water supply hole for ejecting liquid toward the affected area is characterized in that the sub-water supply hole is provided with a diffusion nozzle for condensing the ejected liquid in a conical shape.

According to this structure, since the discharge liquid is diffused and ejected in a conical shape, the liquid can be sprayed over a wide range without using a spray tube. This eliminates the need for the work of inserting the spray tube into the forceps channel, which shortens the observation time and reduces the burden on the patient.

The diffusion nozzle includes a rotary nozzle that is rotated by a liquid flow. This rotary nozzle preferably has a spiral groove on its outer peripheral surface. Also, the diffusion nozzle is
It is preferable that the rotating nozzle is provided with a cap, and the cap has an ejection port. It is preferable that the ejection port has a conical shape whose diameter gradually increases in the ejection direction so that the liquid can be sprayed over a wide range.

The diffusion nozzle is preferably attachable to and detachable from the sub water supply hole. In this case, if the diffusion nozzle is attached to the auxiliary water supply hole, the liquid can be diffused in a conical shape and sprayed, and if the diffusion nozzle is removed from the auxiliary water supply hole, the liquid can be discharged linearly.

[0009]

1 is a schematic external view showing an embodiment of an endoscope including a sub water supply device according to the present invention.
The endoscope 10 is provided with a flexible body insertion part 11, a gripping operation part 12 to be gripped by an operator, a universal tube 13 extended from the gripping operation part 12, and a tip of the universal tube 13. , And a connector unit 14 that can be attached to and detached from a video processor (not shown). As shown in FIG. 2, the objective window 1 is provided on the end surface of the distal end portion of the body insertion portion 11.
5, an illumination window 16, an air / water feeding nozzle 17, a sub water feeding nozzle 18, and a treatment instrument insertion channel 19 are provided,
An objective lens (not shown) is arranged behind the objective window 15. The image formed by the objective lens is converted into an electronic image by an image pickup means (not shown), and is displayed on a monitor (not shown) via a video processor to which the connector section 14 is connected. An illumination lens (not shown) is disposed behind the illumination window 16, and a light guide that passes from the connector portion 14 through the universal tube 13, the grip operation portion 12, and the body insertion portion 11 is provided in the illumination lens. The illumination light from a light source (not shown) provided in the video processor is given via the. The air supply / water supply nozzle 17 is a nozzle for cleaning the objective window 15. The grip operation unit 12 is provided with a bending operation knob 20 for bending the vicinity of the distal end portion of the body insertion unit 11 in the up-down direction or the left-right direction, and between the grip operation unit 12 and the body insertion unit 11. A treatment instrument insertion projection 21 that communicates with the treatment instrument insertion channel 19 is provided at the connection portion of the. Further, a sub water supply port 22 is provided at the rear end of the gripping operation unit 12, and the sub water supply port 22 and the sub water supply nozzle 18 are connected to the sub water supply pipe line 23 (FIG. 5) inside the endoscope 10.
Connected by

As shown in FIG. 3, the sub water supply port 22 is provided with a J cap 24 which is detachable from the sub water supply port 22 and a reverse valve unit 25 for preventing backflow. A sub-water supply tube 26 can be connected to the sub-water supply port 22 with the J cap 24 removed. The sub water supply tube 26 is provided with a connecting portion 27 that is attachable to and detachable from the sub water supply port 22 at one end thereof, and is provided with a luer base 28 for attaching a syringe 29 to the other end thereof.
FIG. 4 shows a state in which the sub water supply tube 26 and the syringe 29 are attached to the sub water supply port 22. The liquid injected from the syringe 29 is ejected from the sub water supply nozzle 18 via the sub water supply tube 26 and the sub water supply pipe line 23.

The above-mentioned endoscope 10 is particularly suitable for the sub water supply nozzle 1.
8, and the configuration of the sub water supply nozzle 18 will be described with reference to FIG. Sub water supply nozzle 18
Is a diffusion nozzle that is adhered to the sub-water supply hole 30 that is the outlet of the sub-water supply conduit 23 and that diffuses the liquid supplied from the sub-water supply conduit 23 into a conical shape. The term "conical" here means
When the opening (spouting port 32a described later) of the sub water supply nozzle 18 is regarded as a point, it means that the sub-water supply nozzle 18 spreads in a conical shape from the opening.

The sub-water supply nozzle 18 is composed of a rotary nozzle 31 rotatably fitted in the sub-water supply hole 30 and a cap 32 covering the rotary nozzle 31, and the cap 32 is provided with an ejection port 32a. ing. Spout 32a
Has a conical shape in which the diameter gradually expands in the ejection direction (leftward in FIG. 5) so that the particles can be efficiently dispersed. The rotary nozzle 31 has a shaft portion 31a forming the same axial direction as the sub water supply pipe line 23, and a screw portion 31b having a spiral groove formed on the outer peripheral portion, and a liquid flowing in the groove of the screw portion 31b. It rotates by the flow. In other words, the liquid flowing through the sub water supply line 23 is
The rotary nozzle 31 is rotated when it wraps around between the shaft portion 31a and the sub water supply pipe line 23 and reaches the ejection port 32a through the groove of the screw portion 31b. When the rotary nozzle 31 rotates, the liquid supplied from the sub-water supply conduit 23 is blown off by the rotational force and is diffused into a conical shape.
Sprayed from 2a.

As an alternative embodiment, the sub water supply nozzle 18 can be made detachable from the sub water supply hole 30. That is, the cap 32 of the sub water supply nozzle 18 may be formed of an elastic member such as rubber, and the cap 32 may be fitted in the sub water supply hole 30. The configuration of the sub water supply nozzle 18 is the same as described above except that the cap 32 is an elastic member. The sub water supply nozzle 18 is attached to the sub water supply hole 3
In the state of being mounted on 0, the liquid supplied from the sub water supply conduit 23 is conically diffused by the rotational force of the rotary nozzle 31 and is sprayed from the ejection port 32 a of the cap 32. On the other hand, in a state where the sub water supply nozzle 18 is removed from the sub water supply hole 30, the liquid supplied from the sub water supply pipe line 23 is ejected in a straight line in the extension direction of the axis of the sub water supply pipe line 23.

According to each of the above embodiments, the sub water supply hole 30 is provided.
The liquid injected from the syringe 29 can be sprayed in a wide range through the sub water supply nozzle 18 provided in the. Therefore, it is not necessary to use the spray tube for spraying the liquid, and the work of inserting the spray tube into the treatment instrument insertion projection 21 and the treatment instrument insertion channel 19 becomes unnecessary. Thereby, the observation time can be shortened as compared with the conventional case where the insertion work is performed, and the burden on the patient can be reduced.

In each of the above embodiments, the jet outlet 32a of the auxiliary water supply nozzle 18 is formed in a conical shape whose diameter increases in the jet direction, but the shape of the jet outlet 32a is not limited to this. Of course.

Although the present invention has been described above with reference to the illustrated embodiment, the auxiliary water supply device for an endoscope according to the present invention is not limited to the illustrated embodiment. For example, the present invention can be applied to an optical endoscope using an optical fiber or an eyepiece instead of the image pickup means.

[0017]

According to the present invention, it is possible to provide a sub-water supply device for an endoscope which can spray liquid over a wide range.

[Brief description of drawings]

FIG. 1 is a schematic external view showing an embodiment of an endoscope including a sub water supply device according to the present invention.

FIG. 2 is a plan view showing the distal end of the body insertion portion of the endoscope.

FIG. 3 is a schematic diagram illustrating a method of attaching a sub water supply tube connectable to the sub water supply port of the endoscope.

FIG. 4 is a schematic diagram showing a state in which a sub water supply tube is attached to the sub water supply port of FIG.

5 is a schematic cross-sectional view taken along the line II of FIG.

[Explanation of symbols]

10 endoscope 11 Internal insertion part 12 Grip operation unit 13 universal tubes 14 Connector part 15 Objective window 16 lighting windows 17 Air / water nozzle 18 Sub water supply nozzle 19 Treatment tool insertion channel 20 Bending operation knob 21 Treatment tool insertion protrusion 22 Sub water outlet 23 Sub water supply line 24 J Cap 25 Reverse valve unit 26 Sub water supply tube 27 Connection 28 Lures 29 syringes 30 Secondary water supply hole 30a female screw part 31 rotating nozzle 31a Shaft 31b screw part 32 caps 32a spout 32b male thread

Claims (5)

[Claims] 1. A sub-water supply device for an endoscope, wherein a sub-water supply hole for ejecting liquid toward an affected area is provided at a tip of an insertion part of the endoscope, and the sub-water supply hole has a conical shape of the discharge liquid. A sub water supply device for an endoscope, which is provided with a diffusion nozzle for diffusing. 2. The sub-water supply device for an endoscope according to claim 1, wherein the diffusion nozzle includes a rotary nozzle that is rotated by a liquid flow. 3. The sub-water supply device for an endoscope according to claim 2, wherein the rotary nozzle has a spiral groove on the outer peripheral surface thereof. 4. The sub water supply device for an endoscope according to claim 2 or 3, wherein the diffusion nozzle further includes a cap that covers the rotary nozzle, and the cap has a diameter gradually increasing in a jetting direction. An auxiliary water supply device for an endoscope that has a conical ejection port. 5. The sub water supply device for an endoscope according to any one of claims 1 to 4, wherein a diffusion nozzle is attachable to and detachable from the sub water supply hole, and the diffusion nozzle is removed. Then, the sub water supply device of the endoscope in which the liquid is linearly discharged from the sub water supply hole.