JPH08215137A - Endoscope - Google Patents

Abstract

PURPOSE: To provide an endoscope which can easily and surely remove and exhaust a residue in a duct for ventilation and water supply. CONSTITUTION: A nozzle 15 for endoscope is composed of a nozzle opening 15A, a nozzle bending part 15B, and a nozzle tubular part 15C, and it is fixed to a front end 11 of the endoscope. When a ventilation or the water feeding is carried from a permeation hole 22 for ventilation and water supply to the nozzle 15 for endoscope, the delivering gas or liquid is delivered from the nozzle opening 15A opposing to the observation window 12 to the window 12, passing through a communicating passage 15D formed to the nozzle 15 for endoscope. The communicating passage 15D formed to the nozzle 15 for endoscope is made in the minimum side (b) at the nozzle opening 15A. A cleaning tool 24 inserted into the permeation hole for ventilation and water supply allowable to insert and remove is formed to make the maximum outer diameter (a) at the rough winding coil part 23A, to the minimum side (b) of the communicating passage 15D, to satisfy the relation of b>a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope provided with an air supply pipe and / or a water supply pipe.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used in the medical field and the like.

In an endoscope used in the medical field, when the endoscope insertion portion is inserted into a living body, body fluid, filth, mucus, etc. of the affected area adhere to an observation window provided on the distal end side of the insertion portion. It may become dirty and it may not be possible to perform sufficient observation. Therefore, by operating the operation button provided on the operation unit on the near side of the endoscope, it is possible to send the liquid to the observation window for cleaning, and to blow the remaining water after that by sending air. Equipped with air and water supply functions. The air supply function is also used when air is supplied into the body cavity in order to facilitate observation of the observation site. These air supply and water supply are performed through the air supply pipe and the water supply pipe.

When an endoscope having various conduits such as the air supply conduit is used for a patient as described above, body fluids, dirt, mucus, etc. enter into these conduits through the opening opening in the body cavity. Therefore, it is necessary to quickly wash or sterilize the endoscope once used for a patient and use it for the next patient.

Therefore, Japanese Utility Model Publication No. 63-40961 discloses that after the endoscopic examination, mucus or tissue fragments that have entered the air / water feeding nozzle are fixed and the air / water feeding nozzle is blocked. In order to prevent this, a cleaning liquid is supplied from an air / water feed line switching device to the air / water feed nozzles and pipes for cleaning. In addition, JP-A-5-22
In Japanese Patent No. 8107, a cleaning brush is inserted from a conduit switching device for air supply / water supply into a conduit for air supply / water supply, and the brush is pushed until it reaches an air supply / water supply nozzle.
To clean the pipe for air / water supply to the water supply nozzle, or to insert a coil instead of the cleaning brush to discharge foreign substances in the pipe from the tip opening of the air / water supply nozzle. The ones shown are shown. Further, in Japanese Utility Model Publication No. 63-17444, an insertion port is provided on the axis of an air / water feeding nozzle, and a linear cleaning tool is inserted to remove and discharge foreign matter. After the cleaning, the insertion port is covered. It has been shown to be closed at.

[0006]

However, in the case of washing with only the washing liquid as described in Japanese Utility Model Publication No. 63-40961, a large amount of washing liquid is required in order to wash off the stains and residues that are dried and firmly fixed. Moreover, there is a problem that a lot of work time and labor are spent.

Further, when cleaning is performed by inserting a cleaning brush or a coil into the duct as in the above-mentioned Japanese Patent Laid-Open No. 5-228107, the front side of the bent portion of the air / water nozzle is relatively easily and surely secured. It is possible to clean the air, but in the vicinity of the bent part of the air supply / water supply nozzle, the cleaning brush or coil supplies air.
A cleaning brush or coil cannot be inserted in the vicinity of the opening located at the tip end side of the bent portion of the air / water supply nozzle that comes into contact with the communication passage formed in the water / water supply nozzle. It took a considerable amount of time to make sure that the pipeline for cleaning was properly cleaned.

Further, in the case of Japanese Utility Model Publication No. 63-17444, as in the above-mentioned Japanese Patent Application Laid-Open No. 5-228107, a cleaning tool cannot be inserted near the opening of the air / water feeding nozzle, It took a considerable amount of time to reliably clean the air and water supply pipelines.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an endoscope capable of easily and surely removing / discharging a residue in a conduit for air / water supply. .

[0010]

According to the endoscope of the present invention, one end of an endoscope nozzle provided at the tip of the endoscope is opened toward the tip of the endoscope and the other end is fed. An endoscope which communicates with at least one of an air tube or a water supply tube to form an air supply conduit and / or a water supply conduit, wherein the removing means for removing residues in the air supply conduit or the water supply conduit Since it is provided in the nozzle for the mirror, the residue in the air supply pipe or the water supply pipe is easily and surely removed / discharged. .

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to a first embodiment of the present invention, FIG. 1 is a diagram showing a schematic configuration of an endoscope apparatus, and FIG. 2 is a sectional view in the vicinity of an endoscope nozzle at a distal end portion of the endoscope. 3 is a view showing a state in which the residue adhered near the nozzle opening of the nozzle communication hole for an endoscope is removed by using a cleaning tool, and FIG. 4 shows the residue adhered near the bent portion of the nozzle of the endoscope nozzle communication hole. It is a figure which shows a mode that it removes using a cleaning tool.

As shown in FIG. 1, an endoscope 1 has an elongated insertion portion 3 having a solid-state image pickup device (not shown) built in at a distal end portion thereof, and an operation portion grasped by an operator at the proximal side of the insertion portion 3. Two
And a flexible universal cord 4 having a built-in light guide cable and a signal cable extending from the rear end of the operation portion, and a connector 5 provided at the other end of the universal cord 4. The connector 5 is provided with an LG connector 7 that is detachably connected to a light source device 6 that supplies gas, water, and illumination light, and the illumination light from the light source device 6 is inserted into the endoscope insertion portion via a light guide cable. It is transmitted to an illumination optical system arranged at the tip to illuminate a subject. Further, the connector 5 is an EL having an electrical contact for connecting to the video processor 8.
A connector 9 is provided, and an electric signal of the subject image converted by the solid-state image sensor built in the distal end portion of the endoscope insertion portion is guided to the video processor 8 via a signal cable, and an observed image of the subject is displayed on the screen of the TV monitor 10. Is displayed.

An observation window 12 of an objective optical system, an illumination window 13 of an illumination optical system, an opening 14 of a treatment instrument insertion channel which also serves as a suction conduit, and an air supply / water supply are provided on the front end surface of the endoscope front end 11. The endoscope nozzle 15 and the like are provided.

The opening 14 of the treatment instrument insertion channel and the forceps insertion opening 16 provided in the operating portion 2 are provided.
And are in communication. Reference numeral 17 is an angle knob provided on the side surface of the operation unit 2.
By operating 7, the bending portion 18 provided in the insertion portion 2 of the endoscope 1 is bent vertically and horizontally. Reference numeral 19 is a switch for operating the video processor 8 provided at the rear end of the operation unit 2. Further, the operation part 2 is provided with an air / water switch which will be described later and which is operated when air / water is supplied from an endoscope nozzle 15 which opens toward the distal end surface of the endoscope tip part 11 of the insertion part 3. 20 and a suction operation switch 21, which will be described later, that is operated when sucking a foreign substance or the like from the opening 14 of the endoscope distal end portion 11.

As shown in FIG. 2, the endoscope nozzle 15 made of a metal material such as stainless steel or a hard plastic material such as nylon or PC has a nozzle opening 15A, a nozzle bent portion 15B, and a nozzle tubular portion 15C. And an air / water feeding through hole 22 formed in the endoscope distal end portion 11.
The nozzle tubular portion 15C is fitted into the opening 22A so that the end portion of the nozzle tubular portion 15C is aligned with the nozzle tubular portion 15C. . Further, the endoscope tip portion 11 includes a tip forming portion 11A made of a metallic material such as stainless steel and a tip cover 11B made of an electrically insulating material such as polysulfone.
The tip forming portion 11A and the tip cover 11B are fitted and adhered to each other. Then, after the tip forming portion 11A and the tip cover 11B are fitted and adhered to each other, the coupling holes 111 and 112 provided in the respective members are cured, for example, after being dried so that the respective members are not separated from each other. The epoxy adhesive 26 is filled and firmly bonded.

When air or water is sent from the air / water sending through hole 22 toward the endoscope nozzle 15, the gas or liquid to be sent or sent is formed in the endoscope nozzle 15. Air or water is supplied to the observation window 12 from the nozzle opening 15A facing the observation window 12 through the communicating passage 15D.

The communication passage 15D formed in the endoscope nozzle 15 through which the gas or liquid passes has the minimum dimension b at the nozzle opening 15A. Through hole 22 for air / water supply
The cleaning tool 24 that can be inserted into and removed from the coil is a coarsely wound coil portion 23A formed by spirally forming a wire 23 formed of a metal material such as stainless steel or a tungsten alloy or a resin material such as nylon or aromatic polyamide. Maximum outer diameter a
Is formed so that the relation of b> a is established with respect to the minimum dimension b of the communication passage 15D.

Therefore, as shown in FIG. 3A, the residue 25 adhered to the nozzle opening 15A of the endoscope nozzle 15 is retained.
The coil portion 23 of the cleaning tool 24 as shown in FIG.
A is inserted into the endoscope nozzle from the nozzle opening side, and the residue 25 of the nozzle opening 15A is rubbed to remove it,
As shown in FIG. 4 (a), the residue 25 adhered to the nozzle bent portion 22 of the endoscope nozzle 15 and the coil portion 23A of the cleaning tool 24 as shown in FIG. Hole 22
The residue 25 that is further inserted into the endoscope nozzle side and fixed to the nozzle bending portion 22 is rubbed and discharged from the nozzle opening 15A to the outside.

As described above, the dimension of the communication passage of the endoscope nozzle is formed so that the cleaning tool can be easily inserted as described above, so that the communication passage formed in the endoscope nozzle can be formed. The adhered dirt can be easily and surely removed and discharged. For this reason, the work time and labor for sterilization / disinfection of the air / water supply pipe line configured by the air / water supply through-hole of the endoscope and the endoscope nozzle can be significantly reduced. .

Further, after the tip forming portion and the tip cover are fitted and bonded to each other, the connecting holes formed in the respective members are filled with an adhesive which is hardened after drying so as not to separate the respective members from each other. By doing so, the need for a connecting member is eliminated, and the number of processing steps and the number of parts can be reduced.

Further, as shown in FIG. 5, the endoscope nozzle 15 is buried deeper in the endoscope tip portion 11 than the endoscope nozzle 15 shown in FIG. 2 and a part of the endoscope nozzle 15 is embedded. Is provided so as to be exposed at the endoscope distal end portion 11, and the nozzle opening 15
A recess is provided in front of A. The minimum width of the opening formed by the nozzle opening 15A and the recess is at least equal to or larger than b. Therefore, the height of the nozzle 15 for the endoscope projecting from the endoscope tip portion 11 is lower than that of the endoscope nozzle 15 shown in FIG. Even if they come into contact with each other, the force applied to the nozzle is reduced, so that the load on the object is reduced and the safety is improved.

As the cleaning tool 24, in addition to the cleaning tool having the coil portion 23A, a brush having a brush portion in which artificial hair made of natural hair, nylon, aromatic polyamide or the like is planted at the tip of the shaft body. There is. For example, this brush is a brush 30 used as shown in FIG. 5, and includes a brush shaft portion 31, a brush brush portion 32 in which bristles are densely planted in a cylindrical shape at the tip end portion of the brush shaft portion 31, It is composed of a brush grip 33 and a hard tip 34 provided at the tip of the brush.

An example of a modification of the endoscope nozzle of the first embodiment will be described with reference to FIG. As shown in FIG. 6A, the nozzle 15 for an endoscope according to the present embodiment has a nozzle tubular portion 1
The nozzle lateral hole 15E is formed in 5C, while the distal end lateral hole 11 communicating with the nozzle lateral hole 15E is formed in the endoscope distal end portion 11.
In addition to forming C, the tip side lateral hole 11C is provided with a non-return lid 36 made of an elastic body that prevents ejection of gas and liquid during air supply / water supply. In addition, a concave portion for improving the insertability of the cleaning tool 24 is formed as a nozzle throat portion 15F below the nozzle opening 15A. Other configurations are the same as those in the first embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted.

As described above, the nozzle lateral hole 15E is formed in the endoscope nozzle 15 and the distal end lateral hole 11C is formed in the distal end portion 11 of the endoscope. The lid 36 is deformed, the cleaning tool 24 is inserted from the tip side lateral hole 11C into the nozzle lateral hole 15E, and the residue fixed in the endoscope nozzle is rubbed and discharged from the nozzle opening 15A to the outside.

As described above, since the cleaning tool can be inserted into the endoscope nozzle through the nozzle lateral hole, it is not necessary to insert the cleaning tool from the short side on the proximal side of the air / water supply conduit. Cleaning of the endoscope nozzle becomes easier, and the cleaning work time and labor can be further saved. Other actions and effects are similar to those of the above-described embodiment.

Another example of a modification of the endoscope nozzle of the first embodiment will be described with reference to FIG. As shown in FIG. 7A, in the endoscope nozzle 15 of the present embodiment, a nozzle bent portion opening 15G through which the cleaning tool 24 can be inserted is formed near the nozzle bent portion. Other configurations are the same as those of the above-described embodiment, and the same members are designated by the same reference numerals and the description thereof is omitted.

The endoscope nozzle 15 having the nozzle bent portion opening 15G as described above is used when air and water are supplied, as shown in FIG.
As shown by the arrow in (a), gas or liquid is ejected toward the front of the endoscope distal end portion 11 from the nozzle bent portion opening 15G. On the other hand, when the nozzle bent portion opening 15G is closed by the body tissue 39 as shown in FIG. 7B, the gas or liquid is observed from the nozzle opening 15A as shown by the arrow in FIG. Gush toward the window 12.

Further, when cleaning is performed after use, the cleaning tool 24 is inserted into the air / water supply conduit through the nozzle bent portion opening 15G, or the coil portion 23A of the cleaning tool 24 is projected through the nozzle bent portion opening 15G. The residue adhered in the endoscope nozzle can be scraped off and removed.

As described above, by forming the nozzle bent portion opening in the endoscope nozzle, the inside of the communication passage of the endoscope nozzle and the air / water supply conduit are cleaned through the nozzle bent portion opening. It can be done easily.

Further, it is possible to perform air supply / water supply to the front of the endoscope front end portion and air supply / water supply to the observation window provided at the endoscope front end portion by one endoscope nozzle. Other actions and effects are similar to those of the above-described embodiment.

It should be noted that, instead of providing an endoscope nozzle having a nozzle bending portion opening formed at the distal end portion of the endoscope, a nozzle tubular body provided with a communicating portion 43 as shown in FIGS. 8 and 9 (a). 41 and the nozzle tongue 42 are bendable plastic members such as metal members such as stainless steel and aluminum alloy, and PE.
The endoscope nozzle 40 may be formed of a plastic member such as T, PP or nylon. This endoscope nozzle 40 has the same nozzle bending portion 1 as the endoscope nozzle 15 when the nozzle tongue portion 42 is bent as shown in FIG. 9B.
A bent portion 40B corresponding to 5B and an opening 40A corresponding to the nozzle opening 15A are formed, and gas or liquid is jetted from the opening 40A toward the observation window during air supply / water supply.

As described above, by forming the endoscope nozzle having the nozzle tongue portion with the bendable plastic member,
When the nozzle tongue is straightened, the cleaning tool can be easily inserted into the endoscope nozzle from the nozzle tongue side, so residues in the air / water supply conduit can be easily removed. can do.

An application example of the endoscope nozzle of FIG. 7 will be described with reference to FIG. As shown in the drawing, the endoscope nozzle 44 of this embodiment is integrally provided with a lid 45 having a connecting portion 45A that closes the nozzle bent portion opening 15G. The endoscope nozzle 44 is made of an elastic material such as a rubber material such as natural rubber, silicon rubber, or fluororubber, or modified PPO, P.
It is formed of a plastic material such as SF, PET, PP. Therefore, the lid 45 is elastically deformed and press-fitted into the nozzle bent portion opening 15G in an airtight or watertight manner. Other configurations are the same as the configurations of the endoscope nozzle of FIG. 7, and the same reference numerals are given to the same members and the description thereof will be omitted.

As described above, by providing the lid for the endoscope nozzle, gas or liquid can be ejected from the nozzle opening toward the observation window without bringing the tip end surface of the endoscope nozzle into close contact with the body tissue. You can

When inserting a cleaning tool such as a brush,
By removing the lid that is press-fitted into the opening of the bent portion of the nozzle, the cleaning tool can be easily and surely inserted into the air / water supply conduit to remove the residue on the surface of the communication hole.

Further, even if the lid body is pushed into the communication hole too much, the lid body is integrated by the connecting portion, so that the lid body alone does not fall into the air supply / insertion conduit. Other actions and effects are similar to those of the above-described embodiment.

The endoscope nozzle 44 shown in FIG. 10 is shown in FIG.
As shown in FIG. 1, a lid body 441 having a nozzle opening 15A and a tubular member 45B are provided, and a concave portion 45C provided in the lid body 441 is press-fitted into a convex portion 45D provided in the tubular member 45B. The same operation and effect as those of the endoscope nozzle 44 shown can be obtained.

Instead of forming the nozzle bent portion opening 15G in the endoscope nozzle as shown in FIG. 7, a linear nozzle slit 15H is provided in the endoscope nozzle 15 as shown in FIG. Good. As a result, there is no work such as opening and closing the lid, and work time can be saved.

Further, as shown in FIG. 13, a cleaning tool for a conduit such as a brush 30 and a cleaning tool 24 inserted from the air / water supplying conduit passes through the slit to remove the residue in the conduit or to observe. You can send air and water toward the window.

Further, the nozzle slit 15H is not limited to the linear nozzle slit, and the nozzle slits shown in FIG.
It may be a cross-shaped nozzle slit 15H as shown in FIG. As a result, the amount of force required to deform the slit is reduced, and the cleaning tool can be easily inserted. However, the endoscope nozzle 15 is formed of an elastic member similarly to the endoscope nozzle 44 shown in FIG.

As shown in FIG. 15, the endoscope nozzle 44 is made of a hard material, for example, metal such as stainless steel, titanium alloy, or tungsten alloy, or ceramic such as aluminum oxide, silicon carbide, silicon nitride, or zirconia. An elastic member 49 having a nozzle slit 15H is attached so as to close the nozzle bent portion opening 15G of the endoscope nozzle 44. This increases the strength of the endoscope nozzle, so it can withstand large forces and wear, is durable, is not easily damaged, and saves time and effort for replacement.
The same action and effect as those of the endoscope nozzle 15 shown in FIG. 12 can be obtained. Since the elastic member 49 is a separate component from the endoscope nozzle 44, it can be easily replaced.

A second embodiment of the present invention will be described with reference to FIG. As shown in the drawing, instead of the endoscope nozzle 44 shown in FIG. 10 provided with a connecting portion 45A, the endoscope nozzle 50 of the present embodiment has a lid 51 and a tubular member 52.
And the separate lid 51 and tubular member 52 are connected by a chain-like connecting member 53. The lid 51 is made of an elastic rubber material such as natural rubber, silicone rubber, fluororubber, or modified PPO, PSF, P.
The tubular member 52 is formed of an elastic member such as ET or PP having an elastic plastic material, while the tubular member 52 is formed of a hard member such as a metal material such as stainless steel or a hard plastic material such as nylon or PC, and the lid member 51 and The connecting member 53 for connecting with the tubular member 52 is formed of a hard member such as a ceramic member such as aluminum oxide, silicon nitride zirconia, or silicon carbide, or a metal member such as stainless steel, a tungsten alloy, or a titanium alloy. Other configurations and operations are the same as those in the first embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted.

By thus forming the tubular member with a hard member, the tubular member is securely fixed to the air / water feeding conduit opening formed at the distal end portion of the endoscope, while the lid formed with the elastic member. The nozzle bent portion opening formed in the tubular member can be reliably closed by the body.

By connecting the lid and the tubular member with a connecting member formed of a chain-shaped hard member, the strength of the connecting portion can be significantly improved, and the endoscope can be replaced by replacing the lid. Not only the life of the endoscope nozzle is extended, but also the labor of removing and replacing the endoscope nozzle from the distal end portion of the endoscope can be eliminated, so that the lifetime of the endoscope is also extended. Other effects are similar to those of the first embodiment.

A modification of the second embodiment will be described with reference to FIG. In the endoscope nozzle 55 of this embodiment, the lid 56 and the tubular member 57 are separate bodies as shown in FIG.
Nozzle openings 15A and fixing recesses 56A are provided in the lid 56.
Is formed. On the other hand, a cap portion 57A is provided at the tip of the tubular member 57. Then, the tubular member 57
The front end surface of the endoscope and the front end surface of the endoscope distal end portion 11 are fixed so as to be flush with each other and communicate with the air / water supply conduit opening. A fitting hole 11D is formed in the endoscope distal end portion 11 so that the fixing recess 56A of the lid 56 is detachably fitted and fixed to the mouthpiece portion 57A provided on the distal end surface of the tubular member 57. Is formed. The lid 56 is formed of an elastic member such as an elastic rubber material such as natural rubber, silicon rubber, or fluororubber or an elastic plastic material such as modified PPO, PSF, PET, PP, and the tubular member 57. Is formed of a hard material such as a metal material such as stainless steel or a hard plastic material such as nylon or PC. Other configurations are the same as those of the above-described embodiment, and the same members are designated by the same reference numerals and the description thereof is omitted.

The endoscope nozzle 55 is formed by a mouthpiece portion 57A of a tubular member and a fitting hole 11D which are fixed to the distal end portion of the endoscope when the endoscope is used, as shown in FIG. 17 (a). The lid 56 is fitted and fixed to the fitting portion. When the endoscope is sterilized and disinfected after the endoscopic examination is completed, the lid body 56 is attached to the endoscope distal end portion 11 as shown in FIG. 17B.
Then, a cleaning tool such as the brush 30 is inserted from the distal end side of the endoscope and the air / water feeding conduit side to remove the residue in the conduit. On the other hand, the removed lid 56 is the brush 3
Clean directly with a cleaning tool such as 0.

As described above, the endoscope nozzle is composed of the lid body having the nozzle opening and the tubular member, and the lid body is detachably attached to the tubular member, so that the cleaning after the inspection is completed. At the time, the cleaning tool can be easily inserted into the air / water supply conduit to reliably bring the cleaning tool into contact with the inner surface of the conduit to remove residues and the like. Other actions and effects are similar to those of the above-described embodiment.

An application example of the modification shown in FIG. 17 will be described with reference to FIG. As shown in the drawing, in the endoscope nozzle 60 of the present embodiment, the tubular member 57 is fixed by projecting from the endoscope distal end portion 11, while the nozzle opening 15A shown in FIG. 17 is formed in the tubular member 57. It is formed by the notch 57B and the lid 56.

For this reason, the lid is downsized, and the cost for forming the lid is low, so that the lid can be made disposable, and only the cleaning of the air / water supply conduit is possible. Can be dedicated to. Other configurations, actions, and effects are similar to those of the endoscope nozzle shown in FIG.
Note that instead of forming the section 57B on the tubular member 57 that constitutes the endoscope nozzle 60 as shown in FIG.
By forming the through hole 57C, the through hole 57C is
Since it is fixed in advance toward the observation window 12, the work of positioning the nozzle opening 15A becomes unnecessary. Other actions and effects are similar to those of the above-described embodiment.

Another application example of the modification shown in FIG. 17 will be described with reference to FIG. As shown in the figure, in the endoscope nozzle 61 of the present embodiment, a nozzle opening 15A and a communication passage 15D are formed in the lid 56. For this reason, since the nozzle opening 15A is formed without any joint, there is no leakage from the joint of gas or liquid during air supply or water supply, and stable air supply / water supply is performed, so that the observation window Cleaning and draining can be performed quickly and reliably and the inspection time can be shortened. Further, the recess 56A of the lid 56, the mouthpiece 57A of the tubular member 57, and the fitting hole 11D are formed over the entire circumference. Therefore, the lid body 56 does not drop off from the tubular member 57 even if the pressure of air / water is increased. Other configurations, operations, and effects are similar to those of the endoscope nozzle described above.

A third embodiment of the present invention will be described with reference to FIG. In the endoscope nozzle 15 of the present embodiment, the nozzle screw portion 15J is formed in a part of the nozzle tubular portion 15C, and the endoscope tip portion 11 also has a tip screw portion 11E that matches the nozzle screw portion 15J. Is forming. That is, the nozzle 15 for an endoscope is fitted with the nozzle tubular portion 15C so as to communicate with the air / water feeding conduit opening 22 of the endoscope distal end portion 11, and the distal end screw portion 11E and the nozzle screw portion 15J.
A tip cover 11B having a screw portion that is screwed to and is screwed to be integrally fixed to the endoscope tip portion 11. That is, the endoscope nozzle 15 includes the tip cover 1
1B, and the threaded portions formed on the endoscope tip portion 11 and the endoscope nozzle 15, respectively, are configured to be attachable to and detachable from the endoscope tip portion 11. In addition, this tip cover 1
Between the 1B and the tip forming portion 11A, for example, a silicon-based adhesive that is easily removed may be applied to prevent loosening. Other configurations are the same as those of the first and second embodiments, and the same members are designated by the same reference numerals and the description thereof will be omitted.

The operation of the endoscope configured as described above will be described. When using the endoscope, the endoscope nozzle 15 is fixed to the endoscope distal end portion 11 by screwing the distal end cover 11B to the distal end screw portion 11E and the nozzle screw portion 15J as shown in the figure.

When the endoscope is sterilized and disinfected after the end of the endoscopic examination, the tip cover 11B is first removed from the endoscope tip 11. Next, the endoscope nozzle 15 is attached to the endoscope distal end portion 1.
Remove from 1. Then, a cleaning tool such as the brush 30 is inserted from the tip end side of the endoscope and the side of the air supply / water supply conduit to remove residues and the like in the conduit while removing the removed endoscope nozzle 15 from the brush 30. Clean directly with a cleaning tool.

Since the endoscope nozzle is detachably attached to the endoscope tip, the endoscope nozzle can be easily removed from the endoscope tip during sterilization and disinfection. In addition to being able to clean the inside of the air / water supply conduit, it is possible to reliably clean the communication passage of the endoscope nozzle.

Further, even if the endoscope nozzle is damaged and a malfunction occurs, the endoscope nozzle can be easily replaced by removing the tip cover. Therefore, the endoscope nozzle is repaired.・ Replacement work time is greatly reduced.

Further, by mass-producing the nozzles for endoscopes, the unit price can be lowered and the nozzles can be disposable, so that the safety of sanitary aspects of the endoscope nozzles can be secured. Other actions and effects are similar to those of the above-described embodiment.

As shown in FIG. 22, the tip cover 11
B may be formed of, for example, a rubber member such as natural rubber, silicon rubber, or fluororubber, or an elastic member such as a plastic material such as modified PPO, PSF, PET, PP. In this case, the tip cover hook portion 11F formed of an uneven portion is provided on the tip forming portion 11A. As a result, the elastic tip cover 11B gets over the tip cover hook portion 11F while being elastically deformed, and is fitted and fixed to the tip component portion 11A. Further, the nozzle tubular portion 15C of the endoscope nozzle 15 is provided with the nozzle overhanging portion 15K. As a result, the tip end cover 11B is attached to the tip forming portion 11A in a state where the nozzle tubular portion 15C of the endoscope nozzle 15 is fitted so as to communicate with the air / water feeding conduit opening 22 of the endoscope tip portion 11. By fitting and fixing, the nozzle overhang 15
K is pressed by the tip cover 11B and the endoscope nozzle 15
Is fixed to the distal end portion 11 of the endoscope. In addition, when removing the endoscope nozzle 15 from the endoscope tip portion 11, the tip cover 11B may be removed from the tip component member 11A.

By thus forming the tip cover with an elastic member and providing the tip cover and the tip component with fitting portions, the tip cover can be attached to and detached from the tip portion of the endoscope without forming a screw portion. A nozzle for an endoscope can be configured. Therefore, it is not necessary to form the screwed portion, and the work of attaching and detaching the endoscope cover is facilitated.

A modification of the third embodiment will be described with reference to FIG. As shown in the figure, the endoscope nozzle 15 of this embodiment is provided.
Is formed so that the outer diameter dimension c of the tubular portion 15C and the inner diameter dimension d of the air / water feeding opening 22 have a relationship of c> d. Further, the endoscope nozzle 15 may be made of, for example, a rubber member such as natural rubber, silicon rubber, or fluororubber, or a modified P
It is made of elastic material such as plastic material such as PO, PSF, PET, PP. Therefore, the tubular portion 15C of the endoscope nozzle 15 is configured to be detachably press-fitted into the air supply / water supply opening 22, and the endoscope part 15C press-fitted into the air supply / water supply conduit opening 22. The nozzle 15 is locked by the frictional force between the tubular portion 15C and the inner peripheral surface of the air / water feeding opening 22.

As described above, the endoscope nozzle formed of the elastic member is press-fitted into the distal end forming portion and locked by the frictional force between the tubular portion of the endoscope nozzle and the inner peripheral surface of the air / water feeding opening. By doing so, the detachable endoscope nozzle can be provided at low cost. Other configurations, operations, and effects are the same as those of the above-described embodiment, and the same members are denoted by the same reference numerals and description thereof will be omitted.

An application example of the modification of the third embodiment will be described with reference to FIGS. 24 and 25. As shown in the drawing, the endoscope nozzle of the present embodiment is formed of an elastic member like the endoscope nozzle of FIG. 23, and is fitted and fixed in the air / water feeding conduit opening 22. On the other hand, as shown in FIG. 24 (a), a guide groove portion 22A having a predetermined taper angle is provided in the air / water feeding conduit opening 22 formed in the endoscope distal end portion 11 with the air / water feeding conduit opening interposed therebetween. Has been. As shown in FIG. 25A, a nozzle projection 15L having a tapered surface on the side surface of the nozzle tubular portion 15C of the endoscope nozzle 15 is inserted into the guide groove 22B. That is, the nozzle projection 15L is inserted into the guide groove 22B, so that the nozzle opening 15A is positioned so as to face the observation window 12. The maximum width e of the guide groove portion 22B and the nozzle protrusion portion 1 are set so that the nozzle protrusion portion 15L is pressed into the guide groove portion 22B and locked by friction.
It is configured such that the relation of e <f is established with the maximum width f of 5L. Further, the number of nozzle projections 15L may be one or three or more.

As described above, the nozzle for the endoscope is provided with the nozzle projection, and the nozzle projection is inserted into the guide groove provided at the opening of the air / water supply conduit, so that the positioning of the nozzle for the endoscope is facilitated. To be done. Other effects are similar to those of the above-mentioned embodiment.

Another modification of the third embodiment will be described with reference to FIG. As shown in the figure, the endoscope nozzle 70 of the present embodiment includes a suction conduit opening 71 formed in the endoscope distal end portion 11.
It is designed to be inserted and fixed in. For this reason, the nozzle 70 for an endoscope is provided with a protrusion 72 for a suction conduit. A relation of g> h is established between the outer diameter dimension g of the suction pipe line protrusion 72 and the inner diameter dimension h of the suction pipe line opening 71 formed in the endoscope distal end portion 11. ing. That is, the nozzle suction line 73 and the suction line opening 71 are communicated with each other by fitting and fixing the suction line protrusion 72 provided on the endoscope nozzle 70 into the suction line opening 71. Air supply to the communication passage 15D of the mirror nozzle 70
It is adapted to communicate with the water supply conduit opening 22.

As described above, the suction pipe line projection formed on the endoscope nozzle and the suction pipe line opening formed on the endoscope nozzle at which the fixing portion between the endoscope nozzle and the endoscope front end portion is formed. With this configuration, the inner surface of the communication passage formed in the bent portion of the nozzle can be exposed, so that the residue attached to the inner surface of the communication passage can be reliably and easily removed. In addition, since the suction pipe line protrusion provided on the endoscope nozzle is fixed by being fitted into the suction pipe line opening, the endoscope nozzle may be disposable for each case. Other configurations, operations, and effects are the same as those of the above-described embodiment, and the same members are denoted by the same reference numerals and description thereof will be omitted.

A suction pipe is formed by forming a suction pipe line projecting portion 72 like the endoscope nozzle 70 of the above embodiment, and forming this suction pipe line projecting portion 72 on the endoscope distal end portion 11. When the endoscope nozzle 70 is fixed to the suction conduit opening 71 as shown in FIG. 27 instead of being press-fitted and fixed in the passage opening 71, the suction opening mouthpiece 71A is attached to the suction conduit opening end of the suction conduit 71.
And a recess 73A fitted into the suction opening base 71A.
Is formed on the inner peripheral surface of the nozzle suction conduit 73 of the endoscope nozzle 70, the same effect as the above embodiment can be obtained.

Another modification of the third embodiment will be described with reference to FIGS. 28 and 29. As shown in the drawing, the endoscope nozzle 75 of the present embodiment has a substantially semi-cylindrical shape, and the communication passage 15D is provided on the flat surface side, while the protrusion 76 is formed on the side surface side. Then, while the endoscope nozzle 75 is fitted into the air / water feeding conduit opening 22 formed in the endoscope tip portion 11, the projection portion 76 is fitted into the lateral hole 11G formed in the side surface of the endoscope tip portion. The endoscope nozzle 75 is detachably fixed to the endoscope tip portion 11. It should be noted that since an uneven slip stopper 76A is formed on the outer surface of the projection portion 76 formed on the endoscope nozzle 75, when removing the endoscope nozzle 75 from the endoscope tip portion 11, this Anti-slip 76A
By pressing, the endoscope nozzle 75 is deformed into a bow shape, and the endoscope nozzle 75 can be easily removed from the lateral hole 11G. Other configurations are the same as those of the above-described embodiment, and the same members are designated by the same reference numerals and the description thereof is omitted.

As described above, the external shape of the endoscope nozzle is formed into a substantially semi-cylindrical shape, and the projection 76 is provided on the side surface side. Since it can be formed in a small size, the distal end portion of the endoscope can be reduced and the diameter of the endoscope can be reduced. Other actions and effects are similar to those of the above-described embodiment.

It should be noted that, as shown in FIG. 30, the endoscope nozzle may be fitted in the endoscope distal end portion from the side surface portion so as to be detachable. In this case, as shown in the figure, the endoscope nozzle 77 formed of an elastic member has a substantially columnar shape, and a communication passage (not shown) that communicates the nozzle opening 15A with the air / water supply conduit opening 22 is formed. The nozzle recess 15M is formed in the tubular portion 15C of the endoscope nozzle 77. On the other hand, the endoscope air supply / water supply pipe line opening 2 is provided at the endoscope distal end portion 11.
The opening recessed portion 11H communicating with 2 is formed, and the opening recessed portion 11H is provided with the claw portion 11J that meshes with the nozzle recessed portion 15M and prevents the endoscope nozzle 77 from falling off. Therefore, by engaging the claw portion 11J and the nozzle concave portion 15M, a detachable endoscope nozzle is configured at the endoscope tip portion. In this way, the nozzle opening of the endoscope nozzle is opposed to the observation window by engaging the endoscope nozzle having the nozzle concave portion with the claw portion provided in the opening concave portion formed at the distal end portion of the endoscope. Therefore, the work of alignment is unnecessary. Further, since the tubular portion of the endoscope nozzle also serves as the side wall of the endoscope tip portion, the diameter of the endoscope tip portion is reduced.

Here, a cleaning tool for cleaning the air / water supply pipes will be described.

As described above, in addition to the cleaning tool 24 formed of the coil 23, the brush 3 having the above-described configuration is also used.
There was 0. However, the brush 30 may not be able to sufficiently discharge and remove the residue in the pipeline. Therefore, a brush capable of sufficiently discharging and removing the residue in the pipeline has been desired.

As shown in FIG. 31, the brush 30 of this embodiment.
A is a brush shaft portion 31, a brush brush portion 32 in which bristles are densely planted in a tubular shape on the tip end portion of the brush shaft portion 31, a brush grip portion 33, and a tip end portion of the brush tip portion so as to project toward the tip side. It is composed of a brushed tip brush portion 35. Therefore, as shown in FIG. 32, when the brush 30A is used for the endoscope nozzle 78 having a small diameter nozzle opening 78A from the proximal side of the conduit, the tip brush portion 34 does not protrude from the nozzle opening 78A. Can scrape the inner surface of the nozzle bent portion 78B to discharge and remove the residue adhering to the communication passage 78D from the nozzle opening 15A. Further, since the tip brush portion 35 is provided at the tip portion like the brush 30 instead of the hard tip tip 34, the tip tip 34 is used for the inner surface of the air / water feeding conduit or for the endoscope. It is possible to prevent the nozzle communication passage 78 from being damaged. Further, when the brush 30A is used for the endoscope nozzle 15 described above, the tip brush portion 35 first scrapes the nozzle bent portion 15B, and then the brush brush portion 32 again.
Since it scrubs, the residue can be easily removed and the cleaning time can be shortened.

Further, as shown in FIG. 31, the brush 30A
Instead of implanting the bristles of the tip brush portion 35 of the above, the individual bristles forming the brush 30B are formed into an arc shape as shown in FIG. It may be 35A. As a result, when the brush 30B is inserted from the air / water feeding through hole 22, the tip brush portion 35A of the brush does not protrude from the air / water feeding through hole 22.
The insertion force can be reduced.

When the brush 30 is used as a cleaning tool for cleaning the endoscope nozzle, as shown in FIGS. 34 and 35, the width b of the brush brush portion 32 of the brush 30 in the natural state and its deformation are deformed. And the minimum width k in the bent state
And the maximum width m of the nozzle tubular portion 79C of the communication passage 79D formed in the endoscope nozzle 79 and the minimum width n of the nozzle opening 79A satisfy the relationship of m <j and n> k. Good to use. As a result, when the brush 30 is inserted through the endoscope nozzle 79, the brush brush portion 32 bends and constantly scrapes the inner surface of the communication passage 79D, so that the residue is discharged from the nozzle opening 79A. Also, the brush 30 can be easily inserted and cleaned from the nozzle opening side. Therefore, the residue and the like can be removed without repeatedly inserting and removing the brush.

Further, as shown in FIG. 36, the cross-sectional shape of the communication hole 80D of the endoscope nozzle 80 is formed into a substantially circular shape, so that the bristles 32A densely planted in a circular tube forming the brush brush portion 32 are formed. 32A. ． ． Evenly abut the surface of the communication hole. As a result, the bristles 3 of the brush brush portion 32
The pressing force applied to the endoscope nozzle by the reaction force of the elastic deformation of 2A acts substantially uniformly on a certain cross section perpendicular to the communication passage 80D to remove the residue.

Now, the nozzle inspection tool for inspecting the dirt condition in the communication passage of the endoscope nozzle will be described. The nozzle inspection tool 80 is formed by twisting a single wire or a plurality of wires, and the nozzle inspection tool 80 is inserted into the endoscope nozzle 15 as shown in FIG. Therefore, the maximum outer diameter dimension q of the nozzle inspection tool 80 is formed smaller than the minimum width dimension p of the communication passage 15D of the endoscope nozzle 15 and the nozzle opening 15A.

In the case of inspecting the dirt condition in the pipeline using this nozzle inspection tool 80, first, from the nozzle opening 15A, a substance which is harmless to the human body and is highly biocompatible, for example, calcium carbonate, starch, protein, etc. The white powder 81 is filled in the communication passage 15D.

Next, FIG. 37 (a) air / water supply conduit 22
The nozzle inspection tool 80 inserted into is inserted into the communication hole 15D of the endoscope nozzle 15. Then, for example, the nozzle bent portion 1
The residue 82 adhering to the vicinity of 5B is rubbed together with the powder 81 by the nozzle inspection tool 80, and the powder 8 is transferred to the nozzle inspection tool 80.
1, the residue 82 and the powder 8 as shown in FIG.
1 is attached to the nozzle inspection tool 80 and the nozzle opening 15
Project outside from A. If no residue adheres to the communication passage, only the powder 81 adheres to the nozzle inspection tool.

As described above, since it is possible to confirm whether or not the residue remains in the communication passage of the endoscope nozzle by inserting the nozzle inspection tool, it is possible to save unnecessary labor for cleaning. , Can save time and effort.

As shown in FIG. 38, the nozzle inspection tool 80
By providing a coating film 84 of a hydrophilic lubricating resin made of a water-soluble polymer substance such as polyvinyl alcohol, polyethylene oxide, or polyethylene glycol on the nozzle, the friction coefficient of the surface is lowered by wetting the coating film 84 with water, and the nozzle inspection tool The 80 can be smoothly inserted into and removed from the air / water transmission through hole 22.

Further, as shown in FIG. 39, the length s of the nozzle inspection tool tip portion 85 with respect to the communication passage length r of the endoscope nozzle 15 is constructed so that the relation of s> r is established, and
The flexibility of the nozzle inspection tool tip portion 85 is made higher than that of other portions. As a result, the nozzle inspection tool 80
When the is pushed in, the residue 82 can be reliably collected without being buckled and deformed along the shape of the bent communication passage 15D which is smoothly inserted into the pipe passage.

By the way, FIG. 40 is an enlarged view of the air / water feeding switch 20 shown in FIG. As shown in the figure, the air / water feed switch 20 is composed of an air / water feed cylinder 200 and an air / water feed button 201 that is detachably fitted into the air / water feed cylinder 200.

The air / water supply button 201 is mainly shown in FIG.
As shown in FIG. 1, the mounting member 202 and the piston portion 203
It is possible to assemble the three parts of the head and the head 204 so that they can be disassembled. Therefore, since the movable part inside is exposed by disassembling, the structure is easy to clean.

As shown in FIG. 40, the head 204 has a finger contact portion 205 with which the operator's finger abuts, and the finger contact portion 20.
5, the spring receiver 206 closely fixed to the spring 5, and the spring receiver 2
It is composed of a spring 207 disposed at 06. The spring 207 is fitted into or fixed to a spring groove 208 formed by the finger contact portion 205 and the spring receiver 206 with an adhesive or the like. For this reason, the spring 207 is detached and lost, and the spring 207 is forgotten to be incorporated at the time of assembly so as to prevent defective assembly.

A mounting member support member 210 is embedded in the mounting member 202. The mounting member 202 is formed of a rubber member such as natural rubber, silicon rubber, or fluororubber or an elastic member such as an elastic plastic material such as modified PPO, PSF, PET, PP. The concave portion of the inner surface of the mounting member support member 210 is formed at an obtuse angle so that dirt is unlikely to adhere and cleaning is easy. The attachment hook 211 elastically deforms and rides over the air / water supply mouthpiece flange portion 213 formed on the air / water supply mouthpiece 212 so as to engage with it.

The piston portion 203 has a mark 215 and
Packing A216, support member A217 that supports this packing A216, sliding contact member A218, and check valve 21.
9 and a check valve support member 22 that supports the check valve 219.
0, a packing B221, a support member B222 that supports the packing B221, a sliding contact member B223, a packing C224, and a support member C225 that supports the packing C224.

The indicator 215 is a blue-colored modified PP that visually indicates that it is related to the air / water feeding operation.
It is made of a plastic material such as O, PSF, PET, PP, etc., and the indicator 215 and the check valve support member 220 are screwed together substantially coaxially with the indicator screw portion 215A and the check valve support member screw portion 220A. Adhered and fixed.

The support member A217 is fitted approximately coaxially with the check valve support member cylindrical portion 226 of the check valve support member 220, and the support member A217 and the check valve support member 220 are separated from each other by the support member A217. The threaded portion 217A and the check valve support member threaded portion 220A are screwed together and adhesively fixed. Further, the sliding contact member A218 is fitted around the support member A217 so as to be substantially coaxial with the support member A217, and is ring-mounted to support the support member A217 and the check valve support member 22.
It is sandwiched between 0 and and fixed by adhesion.

A gas passage is formed in the axial direction of the check valve support member 220, and the leak passage outlet 22 is provided at the upper end.
7 and has a leak passage inlet 228 on the side surface of the central portion.

Further, the support member B222 is fitted around the check valve support member protruding portion 230 of the check valve support member 220 so as to be substantially coaxially fitted around the check valve support member 220, and the support member B222 is slidably attached to the check valve support member 220.
It is sandwiched by 223 and adhered and fixed. Further, the sliding contact member B223 is fitted around the check valve supporting member projecting portion 230 of the check valve supporting member 220 so as to be substantially coaxial with the ring member, and is sandwiched and bonded between the supporting member B222 and the supporting member C225. It is fixed.

The support member C225 is fitted approximately coaxially with the tip end portion 231 of the check valve support member protruding portion 231 of the check valve support member 220. The support member C225 and the check valve support member 220 are adhesively fixed by screwing the support member C screw portion 225A and the check valve support member distal end screw portion 220B. The packing A216 is a support member A.
217 is provided substantially coaxially with the outer ring, the packing B221 is provided substantially coaxially with the support member B222 with the outer ring integrally provided, and the packing C224 is provided with the support member C2.
It is provided so as to be integrally fitted to the shaft 25 substantially coaxially. Further, the check valve 219 is provided on the check valve support member 220 so as to be substantially coaxial with the outer ring as a unit.

It should be noted that the head portion 204 and the piston portion 203 have a spring receiving screw portion 206A formed on the spring receiver 206 and an outer peripheral screw portion 217B formed on the outer peripheral surface of the support member A217.
It is designed to be screwed together and connected and fixed.

The features of the air / water feeding switch 20 will be described with reference to FIG. The air / water button 20
In No. 1, the leak passage inlet curved surface portion 229 of the leak passage inlet 228 is gripped at the time of disassembly and assembly. For this reason, the edge portion is eliminated from the leak passage inlet curved surface portion 229 so that the fingertip or the like is not damaged during disassembly and assembly.

Further, in the assembled state, the air / water feeding button 201 has a gap provided over the entire circumference between the head portion 204 and the mounting member 202. As a result, during cleaning,
Since the air inside the mounting member 202 is easily replaced by the cleaning liquid, no bubbles remain and cleaning is easy.

Further, the interval t provided between the head portion 204 and the mounting member 202 is set so that the test finger for the test finger test defined in IEC601-1 cannot be inserted. Therefore, the fingertip does not touch the spring 207 made of metal, so that electrical safety is ensured.

As described above, the head 204 of the air / water supply button 201 is provided with the indicator 215 colored in blue. On the other hand, the piston portion 203 is provided with a piston portion marking portion 232 colored in blue, and the mounting member 202 is provided with a mounting member marking portion 233 colored in blue. In this way, since the blue indicator portion is provided on the head portion 204, the piston portion 203, and the mounting member 202,
At the time of assembly, it can be determined at a glance that it is a part of the air / water supply button 201.

Further, the air / water feeding cylinder 200 is screwed into the air / water feeding mouthpiece 212 through a through hole 234 formed in the operation portion 2 and fastened to the operation portion 2. In addition, the through hole 234 of the operation part 2 and the air / water supply base 21
An O-ring 235 for ensuring water tightness is arranged between the two.

Further, on the outer peripheral surface of the air supply / water supply mouthpiece projection 235 of the air supply / water supply mouthpiece 212, air supply colored with a blue pigment showing that it is a component related to the air supply / water supply operation.・
A water supply port indicator 236 is provided. With this, it is possible to determine at a glance that it is a part of the air / water supply button 201 during assembly.

A bent pipe 240 is fixed to the air / water supply cylinder 200 with solder 241. Further, the air / water feeding cylinder 200 has three pipes 2
42 is fixed by solder 241. It is desirable that the bending radius of the bending pipe 240 is formed as large as possible in the operating portion, and in this embodiment, the bending radius is set to 5 mm or more and 7 mm or less. As a result, the amount of force required when inserting the cleaning tool is small, insertion is easy, and labor can be reduced.

An upstream air supply tube 243 and an upstream water supply tube 244 are fitted on the pipe 242. A coil pipe 245 is externally fitted to the outer peripheral surfaces of the tubes 243 and 244. The tubes 243 and 244 and the coil pipe 245 externally fitted to the pipe 242.
And are bonded and fixed with an adhesive 246 to protect them. In addition,
The downstream side water supply tube 247 is externally fitted to the pipe 242 to be adhesively fixed, and at the same time, a spool fixing portion 248 is formed to increase the fixing force. Therefore, the upstream side air supply tube 2
43 and the upstream side water supply tube 244 are the coil pipe 2
Since it is protected by 45, it is hard to buckle even if a force is applied in the bending direction.

The downstream water supply tube 247 is thicker than the upstream air supply tube 243 and the upstream water supply tube 244. Therefore, the strength of the downstream side water supply tube 247 is increased and it is difficult for the downstream side water supply tube 247 to bend. Therefore, even if a large force is applied to the downstream side water supply tube 247 during the assembling work of the operating portion 2, the downstream side water supply tube 247 does not buckle.

Further, the ridge line of the diameter changing portion on the inner surface of the air / water feeding cylinder 200 has a curved surface with a radius of 0.1 mm or more. Therefore, even if the air / water supply button 201 is brought into sliding contact, it is not damaged.

The material of each member constituting the air / water supply button 201 is a metal material such as stainless steel, tungsten alloy, titanium alloy, etc., which can withstand the conditions of high pressure, high temperature and high humidity under saturated steam at 135 ° C. and 2 atm. And a ceramic material such as aluminum oxide, silicon nitride, silicon carbide and zirconia, a plastic material such as PSF, PEEK and PES, and a rubber material such as silicon rubber and fluororubber. For this reason, autoclaving is possible and sterilization can be performed in a short time, so that time can be saved significantly.

Further, the head portion 20 of the air / water feeding button 201
4, each of the piston portion 203 and the mounting member 202 is provided with a green mark indicating that autoclaving is possible. Therefore, it can be recognized at a glance that the head portion 204, the piston portion 203, and the mounting member 202 can be autoclaved.

The air / water feeding button 201 is in sliding contact with the inner surface of the air / water feeding cylinder 200 at two locations, a sliding contact member A218 and a sliding contact member B223. Therefore, it is not tilted by the pressure applied from the side. In this way, since the piston portion 203 does not tilt, the air / water feeding cylinder 20
The packing A 216, the check valve 219, the packing B 221, and the packing C 224 are held on the inner surface of 0 so that they are always inscribed.

The sliding contact member B223 is a packing B22.
1 is provided at the end of the piston portion 203. As a result, the sliding contact member B223 is less likely to tilt, and when the air / water feeding button 201 is attached to the air / water feeding cylinder 200, the sliding contact member B223 is inserted before the packing B221. Is not scratched.

Further, the sliding contact member A218 and the sliding contact member B2
The outer diameter of 23 is 2/100 m with respect to the inner diameter of the portion where the sliding contact members of the air / water feeding cylinder 200 are in sliding contact.
It is formed small in the range of m to 9/100 mm. Therefore, the piston part 2 that slides in the air / water supply cylinder
The resistance when sliding 03 is small.

Further, as shown in FIG. 42, the check valve 219 is integrally provided with four ribs 251 radially, and the cross-sectional shape of the rib 251 is substantially semicircular as shown in FIG. Has become. The rib 251 may be provided in any number as long as it is two or more, and the cross-sectional shape of the rib 251 may be polygonal such as triangular or quadrangular. In this way, by providing the rib 251, the check valve 219 can be maintained in a substantially circular shape without being deformed by an external force. In addition, since the rib 251 is formed integrally with the check valve 219, there is no clearance for dirt to enter, and therefore the washability is excellent.

Further, the check valve 219 is the check valve support member 2
20. The rib 251 is formed integrally with the annular groove 252 formed in No. 20, and the rib 251 has a shallow depth of the annular groove step portion 253.
Is formed. For this reason, the thickness of the mounting portion of the rib 251 is thin, and it is difficult for the rib 251 to be deformed, which prevents the check valve 219 from being excessively deformed.

Further, as shown in FIG. 44 (A), the connection between the head portion 204 and the piston portion 203 is performed when the spring receiving screw portion 206A and the outer peripheral screw portion 217B are screwed together.
The step portion of the support member A217 and the tip end surface of the spring receiver 206 come into contact with each other, and the spring receiver fitting portion 206B is externally fitted to the support member A fitting portion 217C. On the other hand, as shown in FIG. 44B, the spring receiving screw portion 206A and the outer peripheral screw portion 217.
When the screwing with B is loosened, the supporting member A fitting portion 217C
Since the fitting between the spring receiving fitting portion 206B and the spring receiving fitting portion 206B is first released, the head portion 204 shakes with respect to the piston portion 203 even though the spring receiving screw portion 206A and the outer peripheral screw portion 217B are screwed together. It is designed to move. As a result, the user can recognize the looseness of the head 203 before the head 203 comes off the piston 203.

Further, as shown in FIG. 44, the spring receiver 2
The taper surface 206C forms a portion of the inner diameter 06 of which the inner diameter changes. For this reason, since the step portions are not formed and they are smoothly connected to each other, dirt is unlikely to accumulate and cleaning is easy.

As shown in FIG. 45, eight notches 252 are provided at equal intervals on the outer peripheral surface side of the spring receiver 206.
In addition, the finger contact portion 20 corresponds to the section portion 252.
5, the projection 25 into which the cutout portion 252 is fitted on the inner peripheral surface side.
3 are formed at 8 places at equal intervals. For this reason, even if a rotational force acts on the head 204 at the time of disassembling and assembling the air / water feeding button 201, the rotational force is received by the fitting portion between the protrusion 253 and the cutout portion 252. Since the rotational force does not act on the adhesive agent that fixes the portion 205, the adhesive agent does not peel off. The protrusion 253 and the notch 2
It suffices that at least one set of 53 and 53 are provided instead of at eight positions.

Further, as shown in FIG. 46, when the attachment member 202 of the air / water feed button 201 is viewed from below, the attachment member 202 is provided with three arc-shaped attachment hooks 211 at substantially equal intervals. ing. In this way, since the mounting hooks 211 are divided and arranged, it is possible to perform the cleaning in a short time without accumulating bubbles during cleaning. The number of attachment hooks may be two or four or more.

Further, as shown in FIG. 46, a communication passage 254 formed in an arc shape is provided on the inner circumference of the mounting member support member 210. Note that the communication passages 254 may be divided at substantially equal intervals to provide two or three or more. Then, as shown in FIG. 47, by forming the communication passage 254 obliquely with respect to the vertical axis, not only the gap between the support member A217 and the mounting member support member 210 can be increased, but also the communication passage 254 is disconnected. A large area can be taken. By forming the communication passage 254 in this way, the spring 207 is stably supported and, for example, when the air / water feed button 201 is washed without disassembling, the head portion 204, the piston portion 203, and the mounting member are attached. 20
The space formed by 2 does not form a blind alley, the cleaning liquid flows inside, and cleaning can be performed easily and in a short time.

Further, as shown in FIGS. 48 and 49, the finger contact portion 205 may be formed with a side wall 205A that covers up to the upper portion of the attachment member 202. Furthermore, this side wall 205
A has a horizontal slit 255 or a vertical slit 256 with a gap u.
Is provided. The gap u between the slits 255 and 256 is set so that the test finger for the test finger test defined in IEC601-1 cannot be inserted. Thus, by forming the side wall 205A on the finger contact portion 205, when disassembling / assembling the air / water supply button 201,
Since the side wall 205A can be gripped and disassembled and assembled, workability is improved. By forming the slit in the side wall 205A, the head portion 204, the piston portion 203, and the mounting member 2
The space formed by 02 does not form a blind alley, which facilitates cleaning when cleaning without disassembling.

Further, as shown in FIG. 50, a reinforcing member 257 is provided to support the bent pipe 240 connected to the air / water feeding cylinder 200. For this reason, for example, the force applied to the bending pipe 240 when the brush 30 is inserted and removed into the bending pipe acts on the reinforcing member 257 to be dispersed and supported. In this way, the bending member 2 is bent by the reinforcing member 257.
By supporting 40, the bent pipe 240 and the air supply
Since no force is applied to the solder 241 that fixes the water supply cylinder 200, the bent pipe 240 is connected to the air / water supply cylinder 20.
The durability of the solder 241 that fixes 0 can be significantly increased.

Further, as shown in FIG. 51, one end portion of the air supply side connecting tube 260 is externally attached to the bending pipe 240 to be adhesively fixed, and the thread winding fixing portion 248 is formed on the outer periphery to be more securely fixed. ing. On the other hand, the other end of the air supply side connection tube 260 is externally attached to the connection end of the air supply / water supply connection member 261 to be adhesively fixed, and the thread winding fixing portion 248 is formed on the outer periphery to be more reliably fixed. .

The tip outer diameter of the taper projection 262 on the tip side of the air / water supply connection member 261 is larger than the minimum inner diameter of the downstream air supply tube 263, and the taper projection 262 is fed to the downstream side. The air tube 263 is extrapolated. Then, the fixing nut 264 having the fixing nut opening 264A is screwed into the air / water supply connecting member 261, thereby pressing the tapered protrusion 262 and detachably locking the downstream air supply tube 263. A heat-shrinkable tube 265 is heated on the downstream side air supply tube 263 to be contracted and deformed so as to come into pressure contact with the taper protrusion 262 without any clearance. A coil or a shape memory member may be used instead of the heat shrinkable tube 265. On the other hand, in the downstream side water supply tube 266, the heat contraction tube 265 is brought into close contact with the downstream side water supply tube 266 similarly to the downstream side air supply tube 263, and the downstream side water supply tube 266 in close contact with the heat contraction tube 265 is taperedly projected 26.
2, the fixing nut 264 having the fixing nut opening 264A is screwed into the air / water supply connecting member 261 and pressed against the taper protrusion 262 to detachably lock the downstream water supply tube 266. Accordingly, the air supply tube 263 and the water supply tube 266 on the downstream side can be reliably and detachably connected by the air supply / water supply connection member 261 and the fixing nut 264. In addition, the fixed nut opening 26
With 4A, the tightened state of the tube can be observed directly, so that defective assembly can be prevented.

Further, as shown in FIG. 51, the corner portion of the air / water feeding cylinder stepped portion 268 is cut off obliquely so that the air / water feeding cylinder overhanging portion 267 and the air feeding side connecting tube 260 do not interfere with each other. is there. Further, the straight portion of the end portion of the bent pipe 240 is inclined upward in the range of 10 to 20 degrees with respect to the horizontal plane so that the air feeding side connecting tube 260 does not interfere with the air feeding / water feeding cylinder step portion 268. There is. Further, the air supply side connection tube 260 is made thicker than the water supply side connection tube 247 so that the brush 30 and the coil 23
It is designed to withstand the insertion of cleaning tools such as. further,
The downstream side connection tube 263 is connected to the downstream side water supply tube 266.
The wall thickness is made thicker than the brush 30 and the coil 23 to withstand insertion of cleaning tools. Further, the air supply side connection tube 260 is made thicker than the downstream side air supply tube 263 so that it will not buckle due to the force applied during the assembly work. Further, the water supply side connection tube 247 is made thicker than the downstream water supply tube 266 so that it will not buckle due to the force applied during the assembly work.

The operation of the air / water feeding switch 20 described above will be described.

The air / water feeding switch 20 shown in FIG.
Indicates a leak state. As shown in the figure, the gas pressurized and delivered from the upstream air delivery tube 243 delivers
It flows into the water supply cylinder 200. At this time, since the packing A216 of the air / water supply button 201 and the check valve 219 and the packing B221 are inscribed on the inner surface of the air / water supply cylinder 200 respectively in an airtight and watertight state, the inflowing gas is caused to flow into the leak passage inlet 228. From air / water button 201
It passes through the inside and is discharged from the leak passage outlet 227 to the outside of the endoscope 1.

FIG. 52 shows the air supply state of the air supply / water supply changeover switch 20. Leak passage outlet 2 as shown
27 is closed by a finger 270. At this time, the inner surface of the air / water feeding cylinder 200 and the air / water feeding button 20
The first packing A216 and the first packing B221 are inscribed in an airtight and watertight state. For this reason, the gas sent from the upstream air supply tube 243 is not supplied with the check valve 219.
The bent portion of the bent pipe 2 is deformed by pressure and flows out.
Flows into 40. Then, the gas is ejected from the endoscope nozzle 15 of the endoscope distal end portion 11 through the air / water supply conduit provided in the insertion portion.

FIG. 53 shows the water supply state of the air / water supply switch 20. This figure is a cross-sectional view in which the air / water supply button 201 is rotated 90 degrees with respect to the central axis.
As shown in the figure, the leak passage outlet 227 is blocked by the finger 270 as in the above-described air supply state, and the air / water supply button 201 has the check valve support member taper portion 271 for air / air supply.
It is pushed until it hits the water supply cylinder taper portion A272. Therefore, the check valve 219 is brought into close contact with the air / water supply cylinder taper portion B273 of the air / water supply cylinder 200 to shut off the air supply. In addition, the air / water supply cylinder 2
Packing B for air / water supply button 201 on inner surface 15 of 00
221 is inscribed in an airtight and watertight state. Therefore, the water sent from the upstream side water supply tube 244 flows into the air supply / water supply cylinder 200, passes through the water supply side connection tube 247, and is supplied to the inside of the insertion part.
The endoscope nozzle 1 of the endoscope tip portion 11 through the water supply passage
Eject from 5.

By the way, FIG. 54 shows an air / water supply conduit merging portion 280, in which the air supply pipe 281 is provided with an air supply pipe lateral hole 282. In addition, the water supply pipe 2
Reference numeral 83 has a bent portion, and the water supply pipe straight portion A284
And water pipe bending portion 285, water pipe straight portion B28
6 and the angle formed by the central axis of the water pipe straight line portion A284 and the central axis of the water pipe straight line portion B286 is 130.
It is formed to fit within the range of 140 to 140 degrees.

The inner diameter of the air supply pipe lateral hole 282 is substantially the same as the outer diameter of the water supply pipe 283. Further, the water supply pipe straight portion A284 is fitted into the air supply pipe lateral hole 282, and the water supply pipe straight portion B286 is fixed by the solder 287 so as to be substantially parallel to the air supply pipe 281. Further, the outer edge of the end portion of the straight portion B286 of the water supply pipe and the small diameter portion 28 of the air supply pipe
Chamfering is applied to each of the outer edges of the end portions of No. 8.

The downstream side water supply tube 266 has a water supply pipe straight portion B28 formed by heating the end portion in advance.
A downstream side water supply tube reduced diameter portion 289 having an inner diameter smaller than the outer diameter of the end portion of No. 6 is formed. Then, this downstream side water supply tube reduced diameter portion 289 is press-fitted into the water supply pipe straight portion B286 to be adhesively fixed. At this time, the downstream side water supply tube reduced diameter portion 289 forms the thread winding portion 290 at two places, that is, the substantially central portion of the fitting portion with the water supply pipe linear portion B286 and the end portion of the water pipe linear portion B286, so that the downstream water supply tube reduced diameter portion 289 is reliably formed. It is fixed.

Similarly, the downstream side air supply tube 263 has an air supply pipe thin portion 28 formed by heating the end portion in advance.
The downstream side air supply tube reduced diameter portion 291 having an inner diameter smaller than the outer diameter of the end portion 8 is formed. Then, the reduced diameter portion 291 of the downstream side air supply tube is press-fitted into the small diameter portion 288 of the water supply pipe to be adhesively fixed. At this time, the downstream side air supply tube reduced diameter portion 291 has the thread winding portions 290 at two locations, that is, the substantially central portion of the fitting portion with the air supply pipe small diameter portion 288 and the end portion of the air supply pipe small diameter portion 288. Formed and firmly fixed.

Similarly, the air supply / water supply tube 292 has an air supply pipe taper portion 2 formed by heating the end portion in advance.
An air / water supply tube reduced diameter portion 294 having an inner diameter smaller than the outer diameter of the end portion of 93 is formed. Then, the reduced diameter portion 294 of the air / water feeding tube is press-fitted into the taper portion 293 of the air feeding pipe to push the air / water feeding tube 292 into the air feeding pipe groove portion 28.
1A is encapsulated and adhesively fixed. At this time, the reduced diameter portion 294 of the air / water feeding tube is securely fixed by forming the thread winding portion 290 in the air feeding pipe groove portion 281A. The other end of the air / water supply tube 292 communicates with the endoscope nozzle 15.

The air / water feeding conduit merging portion 280 having the above structure is used as the air / water feeding tube reduced diameter portion 294.
From the other end to the downstream side air supply tube reduced diameter portion 291 and the downstream side water supply tube reduced diameter portion 289 are entirely covered with an adhesive 294 and cured. Therefore, the reduced diameter portion 294 of the air / water feeding tube and the reduced diameter portion 29 of the downstream air feeding tube
1. The downstream side water supply tube reduced diameter portion 289 does not buckle even if a bending force is applied. The inner diameter of the downstream side water supply tube 266 and the inner diameter of the downstream side air supply tube 263 are set so that the inner diameters thereof are different from each other so that a desired air supply amount and water supply amount can be obtained.

As shown in FIG. 55, the inner diameter of the air supply pipe lateral hole 282 forming the air supply / water supply conduit merging portion 280 and the inner diameter of the water supply pipe straight portion A284 are made substantially the same, and the air supply pipe lateral hole 282 is formed. Central axis of the water pipe straight part A28
By fixing the water supply pipe 283 and the air supply pipe 281 with the solder 287 so that the central axis of the water supply pipe 4 is substantially coaxial, the water supply pipe straight portion B286 and the air supply pipe 281 are substantially parallel. As a result, the downstream air supply tube 26
3 and the taper protrusion 262 are in close contact with each other so that dirt does not enter. Further, as shown in FIG. 56, by forming the air supply pipe lateral hole 282 forming the air supply / water supply pipe line connecting portion 280 into a substantially oval shape, the water supply pipe straight portion 284 can be loosely fitted, and the air supply pipe lateral hole is formed. 282 and water pipe straight section 28
The space of No. 4 can be filled with the solder 287, and the surface of the solder 287 is formed smoothly so that dirt does not accumulate.

By the way, FIG. 57B shows the above-described air / water feeding button 201 shown in FIG. 57A and the second air feeding of the air / water feeding switch of the endoscope 301 having a different structure. -The water supply cylinder 302 is shown. The air / water feeding cylinder 302 includes an air / water feeding base 304 with an operating portion 303 interposed therebetween.
It is fixed by screwing on. In addition, air supply / water supply button 201
The outer diameter v of the slidable contact member B223 is equal to the small diameter portion 305 of the air / water feeding cylinder 302 of the second air / water feeding cylinder 302.
Is formed larger than the smallest inner diameter w. Therefore, the air / water feeding button 201 is different from the endoscope 301 having a different configuration.
There is no risk of misuse because it cannot be attached to.

FIG. 58 shows an air / water feeding mouthpiece 201 and a mounting member 308 of an air / water feeding button 307 of an air / water feeding switch having a different structure. The air supply / water supply button 307 prevents the attachment hook 310 from being hooked on the air supply / water supply base flange portion when the mounting member support member 309 and the air supply / water supply base protrusion are in contact with each other. There is. Therefore, the air / water supply button 307 cannot be attached to the endoscope 1 described above, and there is no risk of misuse.

By the way, FIG. 59 shows the air / water supply cylinder 2
00 is a modified example, and FIG.
The pressing state of 01 is shown. As shown in the figure, the packing C224 has a communication path formed between the packing C224 and the air / water feeding cylinder hemispherical portion 311 which is a hemispherical recess, so that water is fed from the upstream water feeding tube 244 to the water feeding side mouthpiece tube 247. On the other hand, as shown in FIG. 59 (A), packing C224
Is in an airtight and watertight state by being inscribed on the entire inner surface of the air / water feeding cylinder 200, and the water feeding is stopped at this time. As described above, since the air / water feeding cylinder 200 does not have the overring portion, the packing C224 is used for the air / water feeding cylinder 20.
There is no possibility of a malfunction such as being locked in the middle of 0.

Although the endoscope has been described as the direct-viewing type endoscope in the above-described embodiments, the endoscope is not limited to the direct-viewing type endoscope, and the side-viewing type endoscope can be used as shown below. It can also be applied to the endoscope 100.

As shown in FIG. 60, a side-view endoscope 100 is provided.
Then, the endoscope nozzle 1 used in this endoscope 100
The minimum dimension x of the communication passage 102 of 01 and the coil portion 103a
Between the maximum outer diameter y of the cleaning tool 103 having
The relationship is established. Therefore, as shown in the figure, the cleaning tool 103 is inserted from the proximal side of the air / water supply conduit to remove the residue, or the cleaning tool 1 is inserted from the nozzle opening side as shown in FIG.
The residue 25 can be removed by inserting 03. In the side-view type endoscope 100, the nozzle opening 104 is provided to the observation window 12 only by providing the bent portion 105 having a small bending angle.
60, the cleaning tool 10 having the brush 30 and the coil portion 103a as shown in FIG.
In addition to removing the residue 25 in step 3, in addition to these cleaning tools, a treatment tool such as forceps and a balloon is used for the endoscope nozzle 10.
It becomes possible to project toward the observation window 12 through one nozzle opening 104.

As a result, first, since the minimum width of the communication passage is larger than the maximum outer diameter of the cleaning tool, the cleaning tool can be freely rotated to easily scrape off and remove the dirt attached to the inner surface. You can Further, even when the endoscope is inserted into the body cavity, a cleaning tool such as a brush is made to protrude to the vicinity of the observation window through the nozzle opening of the endoscope nozzle, and the dirt adhered to the observation window is scraped off. be able to. Further, similarly to the above-mentioned cleaning tool, by arranging the balloon in front of the observation window through the nozzle opening of the endoscope nozzle and inflating the balloon by water injection, observation in a muddy body fluid becomes possible. Further, the forceps can be projected from the nozzle opening of the endoscope nozzle to cut or collect body tissue that is in close contact with the observation window. Other configurations and operations are the same as those of the direct-viewing endoscope, and the same members are denoted by the same reference numerals and the description thereof will be omitted.

As described above, the endoscope nozzle having the bent portion with a small bending angle is provided in the side-view type endoscope, and the minimum dimension of the communication passage of the endoscope nozzle is set to the cleaning tool. By forming it larger than the maximum outer diameter of the coil part, not only the residue in the communication passage of the endoscope nozzle can be easily and reliably removed, but also dirt attached to the observation window facing the nozzle opening. Can be removed using a cleaning tool such as a brush. Further, without removing the side-viewing type endoscope from the body cavity during the examination, the cleaning tool, the forceps, and the treatment tool of the balloon are projected to the front of the observation window through the nozzle opening of the endoscope nozzle, Cleaning of the observation window, observation in a muddy body fluid, or excision and collection of body tissue in close contact with the observation window can be performed while saving time and labor.

Further, in addition to the treatment tool insertion channel of the side-view endoscope, not only the cleaning tool but also the treatment tools such as forceps and balloons are generally inserted in the insertion direction from the nozzle opening of the endoscope nozzle. Since they can be projected in parallel, there is no need for a familiar operation such as changing the direction of the forceps or the protruding length of the forceps projected from the treatment instrument insertion channel within the observation field of view, greatly reducing the inspection and treatment time. be able to.

Since the above-mentioned effects can be obtained without making the insertion portion thick in the side-view endoscope, the insertability of the insertion portion into the body cavity is not impaired.

Further, by disposing the endoscope nozzle 101 in the recessed portion of the endoscope distal end portion 11 as shown in FIG. 62, a part of the endoscope nozzle 101 is disposed as shown in FIG. It is located below the tip of the endoscope. Therefore, the endoscope tip portion 1 in which the endoscope nozzle 101 is disposed
Since the outer shape of 1 can be reduced, the burden on the patient can be reduced. At this time, the nozzle opening 10 is formed by using the straight endoscope nozzle 101.
4 not only can supply air and water from the observation window 12 to the observation window 12, but also can easily clean the cleaning tool, the forceps, and the treatment tool of the balloon through the nozzle opening of the endoscope nozzle to the front of the observation window. Alternatively, inspection / treatment can be easily performed.

Further, when the brush 30 is used as a cleaning tool for cleaning the endoscope nozzle 101 as shown in FIG. 62, as in the brush 30 shown in FIG. 34 and FIG. Between the width dimension j in the natural state and the minimum width dimension k in the deformed and bent state, and the maximum and minimum dimensions of the communication passage 102 formed in the endoscope nozzle 101, By using a material that satisfies the relationship of the maximum dimension <j and the minimum dimension of the communication passage> k, the brush 30 is brought into contact with the inner surface of the communication passage with a uniform force and is moved forward while rotating the brush 30 to adhere to the inner peripheral surface. Since the dirt can be scraped off and removed, cleaning efficiency can be further improved, and working time and labor can be saved. Furthermore,
As shown in FIG. 63, the bristles 32 in which the cross-sectional shape of the endoscope nozzle 101 is formed in a substantially circular shape with a diameter and densely planted in a tubular shape
A, 32A. ． ． By contacting the brush brush portion 32 having the above with the surface of the communication hole, the pressing force to the endoscope nozzle 101 due to the reaction force of the elastic deformation of the bristles 32A acts substantially uniformly to remove the residue.

[Additional Notes] 1. An air supply conduit and / or a water supply pipe by opening one end of an endoscope nozzle provided at the endoscope front end toward the endoscope front end and communicating the other end with at least one of an air supply tube or a water supply tube. An endoscope having a channel, wherein an endoscope nozzle is provided with a removing means for removing a residue in the air supply conduit or the water supply conduit. By using the removing means provided in the endoscope nozzle, it is possible to easily remove the residue in the air supply conduit or the water supply conduit.

2. The endoscope according to appendix 1, wherein a cross-sectional shape of a communication passage that connects the opening of the endoscope nozzle and the air supply tube or the water supply tube as the removing unit is formed so that the cleaning tool can be inserted and removed. By relatively considering the cross-sectional shape of the communication path and the shape of the cleaning tool, the cleaning tool can be inserted into and removed from the communication path, and the residue in the conduit can be easily removed.

3. The endoscope according to appendix 2, wherein the minimum dimension of the communication passage of the endoscope nozzle is formed larger than the maximum dimension of the cleaning tool. Since the minimum size of the communication passage of the endoscope nozzle is larger than the maximum size of the cleaning tool, the cleaning tool can be freely inserted into and removed from the communication path proximal side and the nozzle opening side.

4. The endoscope according to appendix 1, wherein a part of a nozzle opening of the endoscope nozzle is embedded in a tip end side of the endoscope, and a recess is formed in a front surface of the nozzle opening. While a part of the nozzle opening is buried in the tip of the endoscope, a recess is provided in the front surface of the nozzle opening, so that the tip end surface of the endoscope nozzle does not adversely affect air supply or water supply. It is difficult to enter the field of view of the observation window by reducing the amount of protrusion from
In addition, it is possible to reduce the load on the object by the nozzle tip surface.

5. The endoscope according to claim 2 or 3, wherein a nozzle lateral hole is formed in the nozzle tubular portion of the endoscope nozzle as the removing means, and a distal end lateral hole communicating with the nozzle lateral hole is formed in the side surface of the distal end portion of the endoscope. mirror. It is not necessary to insert the cleaning tool from the proximal side of the conduit, and the communication passage can be easily cleaned.

6. 6. The endoscope according to appendix 5, wherein the tip side lateral hole formed on the side surface of the tip portion of the endoscope is provided with a check lid made of an elastic body for preventing ejection of gas and liquid during air feeding / water feeding. The non-return lid of the tip lateral hole prevents gas or liquid from flowing out of the tip lateral hole when air or water is supplied, while the cleaning tool can be easily inserted into or removed from the communication passage.

7. The endoscope according to supplementary note 2 or supplementary note 3, wherein a nozzle bending portion opening through which a cleaning tool can be inserted is formed in the vicinity of the nozzle bending portion of the endoscope nozzle as the removing means. The inside of the conduit can be easily cleaned by inserting or protruding the cleaning tool from the opening of the nozzle bent portion near the nozzle bent portion.

8. The endoscope according to appendix 7, wherein a lid that closes the opening of the bent portion of the nozzle is provided integrally with the nozzle for an endoscope. By closing the opening of the bent portion of the nozzle with the lid, it is possible to prevent gas or liquid from flowing out of the opening during air supply or water supply, and improve workability.

9. The endoscope according to Appendix 8, wherein the endoscope nozzle is made of an elastic member. The lid can be easily attached to and detached from the opening of the bent portion of the nozzle.

10. The endoscope according to supplementary note 2 or supplementary note 3, wherein a nozzle slit through which a cleaning tool is insertable is formed in the vicinity of the bent portion of the endoscope nozzle made of the elastic member. 11. 11. The endoscope according to appendix 10, wherein the nozzle slit of the endoscope nozzle is formed in a linear shape. 12. 11. The endoscope according to appendix 10, wherein the nozzle slit of the endoscope nozzle is formed in a cross shape. By forming a nozzle slit in the endoscope nozzle, it is possible to save the labor of removing the lid and prevent the gas or liquid from flowing out of the opening during air supply or water supply, while projecting the cleaning tool from the nozzle slit. You can easily clean it.

13. 8. The endoscope according to appendix 7, wherein an opening of the bent portion of the endoscope nozzle is closed by an elastic member having a nozzle slit. The lid body made of an elastic member having the nozzle slits can be easily attached to and detached from the nozzle bent portion opening.

14. The endoscope according to appendix 1, wherein an endoscope nozzle as the removing means includes a lid and a tubular member. 15. The endoscope according to appendix 14, wherein the lid is an elastic member, the tubular member is a hard member, and the lid is fitted and fixed in the tubular member. By removing the lid of the endoscope nozzle from the tubular member, the residue of the tubular member can be reliably and easily removed.

16. 16. The endoscope according to appendix 15, wherein the lid and the tubular member are connected by a connecting member. The lid will not be lost during the cleaning operation.

17. 17. The endoscope according to appendix 16, wherein the connecting member is a hard member. The lid and the tubular member are not separated from each other.

18. 15. The endoscope according to appendix 14, wherein the lid has a nozzle opening. 19. 15. The endoscope according to appendix 14, wherein a nozzle opening provided in the endoscope nozzle is formed by a section formed on a tubular member and a lid. 20. 15. The endoscope according to appendix 14, wherein the nozzle opening provided in the endoscope nozzle is formed by a through hole formed in a tubular member. The shape of the tubular member is simplified and the cleaning workability is improved.

21. 15. The endoscope according to appendix 14, wherein the lid has a nozzle opening and a communication passage. The shape of the tubular member is further simplified, and the cleaning workability is improved.

22. The endoscope according to appendix 1, wherein an endoscope nozzle as the removing means is configured to be detachable from a distal end portion of the endoscope. By removing the endoscope nozzle from the distal end portion of the endoscope, the inside of the duct and the endoscope nozzle can be reliably cleaned.

23. 23. The endoscope according to appendix 22, wherein the nozzle for an endoscope is screwed and fixed to a distal end portion of the endoscope. 24. 23. The endoscope according to appendix 22, wherein the endoscope nozzle is pressed and fixed to a distal end portion of the endoscope by a distal end cover formed of an elastic member. The endoscope nozzle is securely fixed to the distal end portion of the endoscope.

25. 23. The endoscope according to appendix 22, wherein an endoscope nozzle formed of the elastic member is fitted and fixed in an air / water feeding conduit opening formed in a distal end portion of the endoscope. A member for fixing the endoscope nozzle to the endoscope distal end portion is unnecessary, and workability is improved.

26. A protrusion is provided on the outer peripheral surface of the nozzle tubular portion of the endoscope nozzle to supply air to the tip of the endoscope.
26. The endoscope according to appendix 25, wherein a groove portion into which the protrusion is inserted is provided in the water supply conduit opening. 27. Note 22: An endoscope nozzle formed of the elastic member is fitted and fixed in a suction pipe line opening formed in a distal end portion of the endoscope.
The described endoscope. Not only is it easy to fix the endoscope nozzle to the distal end portion of the endoscope, but also the nozzle opening can be reliably opposed to the observation window.

28. 28. The endoscope according to supplementary note 25 and supplementary note 27, wherein the endoscope nozzle formed of the elastic member is press-fitted and fixed to the mouthpiece portion. By constructing the endoscope nozzle by press fitting and fixing, the nozzle openings can be formed seamlessly, so there is no gas or liquid leakage during air supply or water supply, and stable air supply and water supply Is done. Also, the lid does not drop off from the tubular member even when the pressure of air / water is increased. The endoscope nozzle formed of the elastic member is supplied with air.
23. The endoscope according to appendix 22, which is fitted and fixed in a lateral hole communicating with the water supply conduit opening and the air / water supply conduit opening. 30. 30. The endoscope according to appendix 29, wherein a non-slip portion formed of an uneven surface is provided on the surface of the protrusion that fits into the lateral hole of the endoscope nozzle. 31. 23. The endoscope according to appendix 22, wherein the endoscope nozzle formed of the elastic member is fitted into a concave portion formed on the outer surface of the endoscope tip end portion. The endoscope nozzle can be easily attached and detached, and is stably fixed without coming off from the tubular member.

32. 32. The endoscope according to appendix 31, wherein the nozzle tubular portion of the endoscope nozzle forms part of the outer surface of the endoscope distal end portion. It is possible to reduce the diameter of the endoscope tip.

33. 32. The endoscope according to appendix 31, wherein the concave portion communicates with the air / water feeding conduit opening.

Positioning work for arranging the nozzle opening and the observation window in pairs is eliminated.

34. A cleaning brush comprising an elongated shaft body, a radially extending tip brush portion provided at a tip portion of the shaft body, and a brush brush portion in which a large number of bristles are transplanted in a tubular shape. First, the tip brush portion is rubbed, and then the brush brush portion is rubbed to remove the residue, so that the working efficiency is improved.
Further, since the tip brush portion is provided at the tip portion of the cleaning brush, it does not damage the duct or the like.

35. 35. The cleaning brush according to appendix 34, wherein the tip brush portion is formed in a substantially arc shape. 36. Between the outer dimensions of the brush brush portion and the smallest deformed outer dimension of the brush portion when in use, and the maximum dimension and the minimum dimension of the communication passage, the maximum dimension of the communication passage <the outer shape of the brush brush portion before use Dimensions and minimum dimensions of communication passage>
The endoscope according to appendix 1 and the cleaning brush according to appendix 34, in which the relationship between the smallest deformed minimum outer dimension of the brush portion is established.

The brush portion of the cleaning brush evenly contacts the communication passage to scrape off the residue.

37. The endoscope according to appendix 1, wherein the outer diameter of the nozzle opening of the endoscope nozzle is larger than the outer diameter of the communication passage. The residue can be removed by inserting a cleaning tool from the nozzle opening side.

38. The endoscope according to appendix 1, wherein a cross-sectional shape of the communication passage of the endoscope nozzle is formed into a substantially circular shape. The brush portion of the cleaning brush evenly contacts the inner surface to remove the residue.

39. An endoscope nozzle inspection tool for inspecting a communication passage of an endoscope nozzle provided at a distal end portion of the endoscope, which is inserted from the air supply and / or water supply pipe line and inserted into the communication passage and the opening. Nozzle inspection tool for endoscope having a possible shaft portion. 40. 40. The endoscope nozzle inspection tool according to appendix 39, wherein an outer diameter dimension of a shaft portion of the endoscope nozzle inspection tool is smaller than a minimum width of the communication passage. 41. 40. The endoscope nozzle inspection tool according to appendix 39, wherein the shaft portion is provided with a tip end portion that is longer than the communication passage, and the tip end portion has higher flexibility than the shaft portion. 42. 40. The endoscope nozzle inspection tool according to appendix 39, wherein a resin layer that increases lubricity when wet is provided on the outer surface of the shaft portion of the endoscope nozzle inspection tool. Not only the insertability of the nozzle inspection tool is improved, but also the residue can be reliably collected.

43. One end of an endoscope nozzle provided at the tip of the endoscope is opened toward the tip of the endoscope, and the other end is communicated with at least one of an air supply tube or a water supply tube to provide an air supply conduit or water supply conduit. A side-viewing endoscope having the above-mentioned, wherein the removing means for removing the residue in the air supply conduit or the water supply conduit is provided in the endoscope nozzle. By using the removing means provided in the endoscope nozzle, it is possible to easily remove the residue in the air supply conduit or the water supply conduit.

44. 44. A side-viewing endoscope according to appendix 43, wherein an angle of a bent portion of a communication passage that communicates the opening of the endoscope nozzle and the air supply tube or the water supply tube is formed substantially linearly as the removing unit. Since the bent part of the communication passage is straight,
Not only the cleaning tool but also the treatment tool can be arranged near the front of the observation window.

45. Note 4 in which the minimum dimension of the communication passage of the endoscope nozzle is formed larger than the maximum dimension of the cleaning tool.
4. The side-viewing endoscope according to 4. Since the minimum size of the communication passage of the endoscope nozzle is larger than the maximum size of the cleaning tool, the cleaning tool can be freely inserted into and removed from the communication path proximal side and the nozzle opening side. It is also possible to easily remove the residue of No. 1 and the residue of the observation window. .

46. 44. A side-viewing endoscope according to appendix 43, wherein a part of the nozzle opening of the endoscope nozzle is buried in the endoscope front end side, and a recess is formed in the front surface of the nozzle opening. While a part of the nozzle opening is buried in the tip of the endoscope, a recess is provided in the front surface of the nozzle opening, so that the tip end surface of the endoscope nozzle does not adversely affect air supply or water supply. It is possible to improve the insertability by reducing the amount of protrusion from the outer shape of the insertion portion.

[0175]

As described above, according to the present invention, it is possible to provide an endoscope capable of easily and surely removing and discharging the residue in the pipe for supplying air and water.

[Brief description of drawings]

1 to 4 relate to a first embodiment of the present invention,
FIG. 1 is a diagram showing a schematic configuration of an endoscope apparatus.

FIG. 2 is a cross-sectional view in the vicinity of the endoscope nozzle at the tip of the endoscope.

FIG. 3 is a diagram showing a state in which a cleaning tool is used to remove residue that has adhered to the vicinity of a nozzle opening of an endoscope nozzle communication hole.

FIG. 4 is a diagram showing a state in which a cleaning tool is used to remove residue that has adhered to the vicinity of a bent portion of a nozzle of an endoscope nozzle communication hole.

FIG. 5 is a sectional view showing another arrangement example of the endoscope nozzle of the first embodiment.

FIG. 6 is a cross-sectional view showing a configuration and an operation according to an example of a modified example of the endoscope nozzle of the first embodiment.

FIG. 7 is a cross-sectional view showing the configuration and operation of another modification of the endoscope nozzle of the first embodiment.

8 and 9 relate to another modification of the endoscope nozzle, and FIG. 8 is a perspective view showing the endoscope nozzle.

FIG. 9 is a cross-sectional view showing the configuration and action of an endoscope nozzle.

10 is a cross-sectional view showing the configuration and operation of an application example of the endoscope nozzle of FIG.

11 is a cross-sectional view showing another configuration of the endoscope nozzle of FIG.

12 and 13 relate to still another modification of the endoscope nozzle, and FIG. 12 is a view showing the configuration of the endoscope nozzle.

FIG. 13 is a view showing the action of the endoscope nozzle.

FIG. 14 is a diagram showing another configuration of the slit.

15 is a diagram showing another configuration of the endoscope nozzle of FIG.

FIG. 16 is a sectional view showing the configuration of an endoscope nozzle according to a second embodiment of the present invention.

FIG. 17 is a sectional view showing the configuration and action of an endoscope nozzle according to a modification of the second embodiment.

FIG. 18 is a cross-sectional view showing the configuration and action of an endoscope nozzle according to an application example of the modification of the second embodiment.

FIG. 19 is a cross-sectional view showing another configuration of the endoscope nozzle of FIG.

FIG. 20 is a cross-sectional view showing the configuration and action of an endoscope nozzle according to another application example of the modification of the second embodiment.

FIG. 21 is a cross-sectional view showing the configuration of the distal end portion of the endoscope according to the third embodiment of the present invention.

FIG. 22 is a view showing another fixing method of the endoscope nozzle to the endoscope distal end portion.

FIG. 23 is a sectional view showing the structure of an endoscope nozzle according to a modification of the third embodiment.

24 and 25 relate to an application example of a modification of the third embodiment, and FIG. 24 is a diagram showing a configuration of a distal end portion of an endoscope.

FIG. 25 is a diagram showing a configuration of an endoscope nozzle.

FIG. 26 is a sectional view showing the structure of an endoscope nozzle according to another modification of the third embodiment.

27 is a cross-sectional view showing another configuration of the endoscope nozzle of FIG.

28 relates to another modification of the third embodiment with reference to FIGS. 28 and 29, and FIG. 28 is a cross-sectional view showing the configuration of the distal end portion of the endoscope.

FIG. 29 is a sectional view showing the operation of the endoscope nozzle.

FIG. 30 is a cross-sectional view showing another configuration of another modified endoscope endoscope according to the third embodiment.

FIG. 31 is a diagram showing an example of a brush.

FIG. 32 is a view showing the action of the brush.

FIG. 33 is a diagram showing another example of the brush.

FIG. 34 is a diagram showing another example of the brush.

FIG. 35 is a diagram showing a relationship between inner diameters of communication holes of the endoscope nozzle.

FIG. 36 is a view showing a communication hole having a substantially circular cross-sectional shape.

FIG. 37 is a view showing the action of the nozzle inspection tool.

FIG. 38 is a view showing an example of a nozzle inspection tool.

FIG. 39 is a view showing the relationship between the length of the tip of the nozzle inspection tool and the length of the communication hole.

[Figure 40] Enlarged view of the air / water switch

FIG. 41 is a view showing a schematic configuration of an air / water feeding button.

FIG. 42 is a view showing a check valve.

FIG. 43 is a β-β sectional view of FIG. 42.

FIG. 44 is an enlarged view showing the connection between the head and the piston.

FIG. 45 is a view showing a spring receiver.

FIG. 46 is a view of the air / water supply button seen from below.

FIG. 47 is a cross-sectional view showing a communication path of a mounting member support member.

FIG. 48 is a diagram showing an example of a finger rest.

FIG. 49 is a diagram showing another example of the finger rest.

FIG. 50 is a cross-sectional view illustrating a schematic configuration of a bent pipe.

FIG. 51 is a view showing a connecting tube on the air / water feeding side.

FIG. 52 is a view showing an air supply state of an air supply / water supply switch.

FIG. 53 is a diagram showing a water supply state of an air / water supply switch.

FIG. 54 is a view showing a confluence part of air supply / water supply pipelines.

FIG. 55 is a view showing another configuration of the air / water feeding conduit joining portion.

FIG. 56 is a view showing another configuration of the air / water feeding conduit joining portion.

FIG. 57 is a view showing another configuration of the air / water feeding switch.

FIG. 58 is a view showing another configuration of the air / water feeding button.

FIG. 59 is a view showing a modified example of the air / water feeding cylinder.

60 to 63 are diagrams in which the endoscope nozzle is applied to a side-viewing type endoscope, and FIG. 60 is a view showing the vicinity of the endoscope nozzle at the tip of the side-viewing type endoscope. Cross section

FIG. 61 is a view showing a state where a cleaning tool is used to remove residue that has adhered to the vicinity of the nozzle opening of the endoscope nozzle communication hole.

FIG. 62 is a cross-sectional view showing another arrangement example of the endoscope nozzle.

63 is a front view of FIG. 62. FIG.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masaaki Nakazawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Hisao Yabe 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. An air supply pipe by opening one end of an endoscope nozzle provided at the endoscope front end toward the endoscope front end and communicating the other end with at least one of an air supply tube or a water supply tube. An endoscope having a channel and / or a water supply conduit, wherein an endoscope nozzle is provided with a removing unit for removing a residue in the air supply conduit or the water supply conduit.