JP2009233224A - Distal end of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent clogging of a water feeding duct by inhibiting backflow of mucus, blood, etc., from a water feeding jet port. <P>SOLUTION: The endoscope distal end 10 has the water feeding jet port 20 in a resin cap 13 on the distal end side of a water feeding tube 18 for feeding water into a body to be observed. In the endoscope distal end 10, a cone-shaped projecting edge part 21 swelling at a prescribed inclination angle or cylindrical projecting edge part projecting in the vertical direction, for example, projecting from a distal end face 13F, is integrally formed in the peripheral edge of the water feeding jet port 20 in the cap 13 (on the distal end face 13F). With this structure, the mucus or blood, etc., flowing toward the water feeding jet port 20, detours around the projecting edge part 21, so that the mucus or blood, etc., does not flow backward into the water feeding tube from the water feeding jet port 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a configuration of a water supply port portion called a water supply jet port or the like that is provided on an endoscope front end portion, in particular, an endoscope front end surface or the like for supplying water into an observed body, and supplies water into the observed body.

  FIG. 5 shows a configuration of a distal end surface of a conventional endoscope (scope) distal end portion. The distal end portion 1 includes illumination windows 2a and 2b optically connected to a light guide, objective optics. An observation window 3 connected to a system or a solid-state imaging device, an air / water supply nozzle 4 provided for cleaning the observation window 3, a treatment instrument insertion channel 5 for deriving a treatment instrument, and water supply to the body to be observed A water supply jet port 6 is provided.

An air / water supply device is connected to the air / water supply nozzle 4 via an internal air / water supply pipe, and water or air is supplied from the air / water supply nozzle 4 toward the observation window 3. By performing the above, mucus in the body, blood, dirt, etc. adhering to the observation window 3 can be washed and removed. On the other hand, the water supply jet port 6 is provided with, for example, a connection port such as a syringe of an operation unit via an internal water supply pipe 7 shown in FIG. 6, and physiological saline, a chemical solution, or the like is supplied from the syringe or the like. (It is possible to supply air).
JP 2006-345887 A

  However, in the conventional endoscope distal end 1, in-vivo mucus, blood, dirt, etc. may invade (reverse flow in) from the water supply jet port 6, and the water supply tube 7 is clogged in the vicinity of the water supply jet port 6. There is a problem that occurs. That is, as shown in FIG. 6, since the water supply jet port 6 is open on the same surface as the front end surface (front surface) of the front end portion 1, mucus, blood, etc. K can easily flow from the edge, The inner diameters of the water supply jet port 6 and the water supply pipe 7 may be extremely thin, and the water supply pipe line is clogged.

  Further, as shown in FIG. 5, when the water supply jet port 6 is arranged in the injection region of the air supply / water supply nozzle 4, mucus, blood, etc. K is moved to the water supply jet port 6 side, and this water supply jet The reverse inflow of K such as mucus and blood into the mouth 6 is promoted.

Furthermore, as shown in FIG. 6, in order to increase the injection force, the diameter d ₁ of the water supply jet port 6 (cap portion) may be formed smaller than the diameter d ₂ of the internal water supply pipe 7. In some cases, mucus, blood, and the like K that have entered the inside become difficult to be discharged to the outside, and such a situation also promotes clogging of the pipeline.

  The present invention has been made in view of the above problems, and an object thereof is to provide an endoscope distal end portion that can prevent backflow of mucus, blood, and the like from a water supply jet port and prevent clogging of the water supply conduit. There is to do.

In order to achieve the above object, an invention according to claim 1 is provided separately from an air / water nozzle for cleaning an observation window and the air / water nozzle, and is used for supplying water into an observed body. An endoscope distal end portion having a water supply jet port is characterized in that a protruding edge portion protruding outward from the water supply jet port arrangement surface is provided on the periphery of the surface on which the water supply jet port is arranged.
The invention according to claim 2 is characterized in that the protruding edge portion is integrally formed with a resin tip cap.

  According to the configuration of the present invention, the peripheral edge of the water supply jet port, for example, a cone-shaped (mountain) protruding edge that gradually rises from the endoscope front end surface toward the water supply jet port, or perpendicular to the endoscope front end surface. A cylindrical projecting edge projecting into the water is formed, and the projecting edge suppresses the mucus, blood, and the like adhering to the distal end surface from flowing into the water feed conduit from the water feed jet.

According to the distal end portion of the endoscope of the present invention, reverse inflow of mucus, blood and the like from the water supply jet opening is suppressed, and there is an effect that clogging of the water supply conduit can be prevented.
Further, according to the configuration of the second aspect, there is an advantage that the protruding edge portion can be easily formed, and the strength of the water jet port portion formed on the cap by the protruding edge portion is increased.

  1 and 2 show the configuration of the endoscope distal end portion according to the first embodiment. In FIG. 1, the distal end portion 10 has various members attached to a main body 12 and is made of resin. A cap 13 is attached. An objective optical system 15 having an observation window 14 is attached to the main body 12, and a CCD 17 is connected and fixed to the objective optical system 15 via a prism 16. As described with reference to FIG. 5, two light guides having an irradiation window, an air / water pipe for cleaning the observation window, a treatment instrument insertion channel, and the like are attached to the main body 12.

Further, as shown in FIG. 1, a water supply pipe 18 having an inner diameter (diameter) d ₂ disposed from an endoscope operation unit or the like is attached to the main body 12, and the distal end side of the water supply pipe 18 is attached. For example, a water supply jet port 20 having an inner diameter d ₁ (d ₁ <d ₂ ) slightly smaller than the above d ₂ is provided. Note that, on the endoscope operation section side of the water supply pipe 18, for example, a connection port (water transmitter connection port) for connecting a syringe injection port is provided.

As shown in FIG. 2, the water supply jet port 20 is formed so as to penetrate the resin cap 13, and a protruding edge portion 21 is integrally formed on the periphery of the water supply jet port 20. . That is, the protruding edge portion 21 has a conical shape (mountain shape) that protrudes at a predetermined inclination angle from the front end surface (cap surface) 13F toward the center of the jet port at the peripheral edge (omnidirectional direction) of the water supply jet port 20. The The protruding edge 21 diverts mucus, blood, and the like flowing to the water supply jet port 20 around the protruding edge 21 in a normal use state or at the time of air supply / water supply by an air supply / water supply nozzle, it is preferable that the height t as not to reach the jet opening 20, the height t may, for example, if more than 1/4 of the inner diameter d ₁ of the water jet port 20 (more than 1/2, 3/4 or more Etc.).

  According to the configuration of the first embodiment, the chemical solution, physiological saline, and the like sent from the water pipe 18 can be supplied from the water jet port 20 into the body to be observed, and the water jet is projected by the protruding edge 21. It is possible to prevent mucus, blood and the like from flowing back into the water pipe 18 from the mouth 20. That is, mucus, blood, and the like are directed toward the water supply jet port 20 when the distal end portion of the endoscope is bent in various directions during observation, or when air is supplied or supplied from the air supply / water supply nozzle. At this time, mucus, blood, and the like pass around by the protruding edge portion 21 and do not flow backward into the water supply jet port 20. As a result, clogging of the water supply jet port 20 and the water supply pipe 18 (water supply pipe line) is prevented. Further, the protruding edge 21 has an advantage of increasing the strength of the water supply jet port 20.

  FIG. 3 shows a modification of the first embodiment. In this example, a tapered surface 24 is provided on the lower side of the water jet port 23 as shown in the figure. According to this taper surface 24, the flow of the chemical liquid and the like becomes smooth, and the injection force becomes good. And also in the cap 13 provided with this water supply jet port 20, the protruding edge 25 similar to FIG. 2 is formed.

  According to such a configuration, as described above, a good injection state is obtained, and the projecting edge portion 25 serves to maintain the strength around the water supply jet port 23. That is, in the conventional configuration in which the protruding edge portion 25 is not provided, when the above-described tapered surface 24 is formed, the strength around the water supply jet port is reduced, and the water supply jet port is peeled off or damaged. Although there is a possibility, since the strength around the water jet port 23 is maintained by the protruding edge 25 in the example of FIG. 3, the above-described disadvantage does not occur.

FIG. 4 shows the configuration of the second embodiment. In this second embodiment as well, as in the first embodiment, a resin cap 27 is provided at the distal end portion 10. water jet port 28 of the inner diameter d ₁ to the distal portion of the water supply pipe 18 is formed in. A cylindrical protruding edge 29 is integrally formed on the periphery (omnidirectional) of the water supply jet port 20, and the height t of the protruding edge 29 is also, for example, ₁ of the inner diameter d ₁ of the water supply jet port 28. / 4 (1/2, 3/4) or more.

  Also according to the second embodiment, mucus, blood, etc. adhering to the distal end surface 27F bypass the cylindrical protruding edge 29 and are prevented from flowing into the inside from the water supply jet port 28, and the water supply jet The clogging of the mouth 28 and the water supply pipe 18 is prevented.

  In the above embodiment, the case where the water supply jet ports 20, 23, and 28 are arranged on the front end surface has been described, but the present invention is similarly applied even when the water supply jet port is arranged on the side surface of the front end portion. can do.

It is sectional drawing which shows the structure of the endoscope front-end | tip part which concerns on 1st Example of this invention. It is sectional drawing to which the part of the water supply jet opening of 1st Example was expanded. It is sectional drawing of the water supply jet opening part which shows the structure of the modification of 1st Example. It is sectional drawing of the water supply jet opening part which shows the structure of the endoscope front-end | tip part which concerns on 2nd Example. It is a figure which shows the structure of the conventional endoscope front-end | tip part (tip surface). It is sectional drawing which shows the structure of the water supply jet opening part of the endoscope front-end | tip part of FIG.

Explanation of symbols

1, 10 ... End of endoscope,
6, 20, 23, 28 ... water jet,
7, 18 ... water pipe,
12 ... tip body,
13, 27 ... cap,
21, 25, 29 ... protruding edges.

Claims (2)

In the distal end portion of the endoscope having an air / water nozzle for cleaning the observation window and a water-jet port arranged separately from the air / water nozzle and for supplying water into the observed body,
An endoscope distal end portion provided with a protruding edge that protrudes outward from the surface of the water supply jet port arrangement on the periphery of the surface on which the water supply jet port is arranged.   An endoscope distal end portion, wherein the protruding edge portion is integrally formed with a resin distal end cap.

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