JP3324948B2 - Endoscope forceps stopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a procedure for inserting a treatment instrument into a treatment instrument channel through which a treatment instrument such as forceps for treating an affected part by projecting from a distal end portion of the endoscope to the outside is passed through. The present invention relates to an endoscope forceps stopper made of an elastic material for closing a treatment instrument insertion port.

[0002]

2. Description of the Related Art Conventionally, in the medical field, various internal organs and the like in a patient's body are visually inspected from the outside without damaging the living body, and a lesion site (affected part) in the patient's body is excised and collected through an endoscope. Or inject drug solution into the affected area
An endoscope is used as a means for performing treatment such as administration.

FIG. 5A shows an entire configuration of an example of an endoscope. As shown in FIG. 5A, this endoscope 100
It comprises an in-body insertion section 1, an operation section 2, and a connector cord section 3. The body insertion portion 1 includes a tip 10
And a curved portion 11 and a flexible portion 12 which is a flexible and bendable tube. The operation unit 2 includes a grip unit 20.
Vertical knob 21a, left and right angle knob 21b, suction button 22a, and air / water button 22
b, a forceps port member 24, and a forceps port base 23. The connector cord section 3 is connected to a light source (not shown), an image processing device, a suction source, and an air / water supply source.

FIG. 5B shows a front configuration of a distal end portion 10 of the endoscope 100. As shown in FIG. 5B, the distal end portion 10 includes illumination lenses 13, 13, an objective lens 14, an air / water supply nozzle 15, and a suction / treatment port 1.
6.

[0005] Light from the light source is guided into a light guide (not shown) composed of an optical fiber bundle. The light guide is inserted into the connector cord portion 3 and the inside of the body insertion portion 1, and the illumination lens 13 provided at the distal end portion 10,
Light is radiated from 13 to illuminate a field of view of an objective lens 14 described later.

[0006] A bellows-like mechanism (not shown), an operation wire (not shown), and the like are provided in the curved portion 11, and the operation wire is inserted into the flexible portion 12 and the upper and lower angle knobs are provided. 21a and the left and right angle knobs 21b. For this reason, when the operator grips the grip portion 20 and rotates each knob with a finger, the curved portion 11 bends or rotates freely in any of up, down, left, and right directions, and the distal end portion 10 is rotated 360 degrees. In the direction of.

[0007] An objective lens 14 is disposed at the distal end portion 10 to capture an image in a visual field. This video is
An optical fiber bundle (not shown) is used to send the image data from the insertion unit 1 through the operation unit 2 and the connector cord unit 3 to an image processing device (not shown), or a CCD (Charge not shown) arranged at the distal end 10. Cuppled Device:
After being converted into image signals of a large number of pixels by a charge-coupled imaging device, the image signals are transmitted from the insertion unit 1 through the operation unit 2 and the connector code unit 3 to the above-described image processing device via a lead wire (not shown). And it becomes an image.

[0008] Air or water from the above-mentioned air supply / water supply source is independently guided into an air supply / water supply conduit (not shown). The air / water supply line is inserted into the connector cord portion 3 and the inside of the body insertion portion 1, and the air / water supply button provided at the distal end portion 10 is operated by operating the air / water supply button 22 b.
Air or water is independently injected from the water supply nozzle 15. With such a configuration, it is possible to secure the visual field of the objective lens 14 by applying air pressure and expanding the inside of the organ, and to wash and dry the objective lens 14.

A suction conduit (not shown) is connected to the above-mentioned suction source, and this suction conduit is inserted into the connector cord portion 3 and the inside of the body insertion portion 1.
The inside of the body insertion portion 1 also serves as a treatment tool channel (not shown) described later. With this configuration, when the suction button 22a is operated, the suction /
Bleeding, body fluid, and the like are suctioned from the treatment port 16 to the suction source.

The above-mentioned forceps opening member 24 is attached to the forceps opening base 23. An inlet of a channel-like treatment instrument channel (not shown) is connected to the forceps port member 24. The channel for a treatment tool is inserted into the body insertion portion 1.
It is also inserted into the body insertion section 1 from the operation section 2 and is connected to the suction / treatment port 16 provided at the distal end portion 10. With such a configuration,
A conduit communicates from the treatment instrument insertion port 24 f provided in the forceps port member 24 to the suction / treatment port 16. Therefore, forceps for performing procedures such as resection and suturing on the affected area,
Insert a treatment tool such as a catheter or contrast tubing for injecting / administering an anesthetic or a drug from the treatment tool insertion port 24f,
By penetrating the inside of the treatment instrument channel and projecting from the suction / treatment port 16 at the distal end of the endoscope, the operator can visually observe an image from the endoscope, perform surgery with the treatment instrument, collect and observe biological tissue, and the like. be able to.

However, at the time of imaging with an endoscope, as described above, air is supplied to apply an air pressure higher than the atmospheric pressure to a body cavity or the like, and the visual field is secured by pushing and expanding the inner wall of an organ or the like. . For this reason, if the treatment instrument insertion port 24f is left open, body fluids and contaminants tend to flow backward from the inside of the body cavity with high air pressure to the treatment instrument insertion port 24f with low air pressure, and the body fluid and the like are sucked and treated. There is a risk that the treatment instrument 16 may pass through the treatment instrument channel, reach the treatment instrument insertion port 24f, and leak to the outside.

[0012] Body fluid and dirt from the affected part are removed from the treatment tool insertion port 24.
If it leaks out from f, it is not preferable from the viewpoint of hygiene, and in the case of an endoscope having a configuration as shown in FIG. 5A, the operation knobs 21a and 21b become wet and slippery, and Inconvenience also occurs in operation.

Therefore, in order to prevent the above-mentioned backflow leakage, conventionally, the flange 24a of the forceps opening member 24 is formed in a substantially dish-like shape made of an elastic material such as rubber and has a slit 2 at the center.
The outer edge of the forceps plug 25 'having 5e' was fitted and fitted. In this manner, when the treatment tool is not inserted, the slit 25e 'is closed, so that the treatment tool insertion port 24f is closed, and leakage of body fluid and the like is prevented. On the other hand, when the treatment tool is inserted, the treatment tool can be easily inserted into the inside by pushing the treatment tool through the slit 25e ', and the slit 25 other than the portion where the treatment tool is inserted is inserted.
Since e 'is closed, the treatment tool insertion port 24f is similarly closed, and the treatment tool can be inserted while preventing leakage of body fluid and the like.

In the above-mentioned forceps stopper, in order to further enhance the function of preventing leakage when the treatment tool is not inserted, a forceps stopper (hereinafter referred to as a “non-perforated”) in which a lid is attached to and detached from the forceps stopper by fitting. Forceps stopper with a mold lid "). In addition, a slit or small hole is provided in the center of the lid, and the lid is attached and detached as appropriate according to the type and outer diameter of the treatment tool. In some cases, it is used as a double structure forceps stopper to prevent leakage A type in which the function is improved and used as a single forceps stopper in some cases (hereinafter, referred to as a "forceps stopper with a perforated lid") has also been developed. And
These forceps stoppers with a lid further include a lid formed separately from the forceps stopper main body (hereinafter, referred to as a “separate-type forceps stopper with a lid”), and a lid having a forceps stopper with a connecting member or the like. What is integrated into the main body (hereinafter referred to as “integral type forceps stopper with lid”
That. )was there.

In the above-mentioned forceps stopper with a non-porous lid,
When it becomes necessary to use the treatment tool, the lid is removed. In the case of a forceps stopper with a perforated lid, the lid is appropriately removed in accordance with the type and outer diameter of the treatment tool. In the case of a forceps stopper with a perforated lid, the lid is frequently deteriorated because the frequency of insertion of the forceps is higher than that of the forceps stopper main body. If the forceps stopper with a separate lid is used, replace it with a new lid. Removed for When inserting a syringe or a tube, the lid must be removed before use. Therefore, in the forceps stopper with a lid, the lid attached to the forceps stopper main body is removed very frequently.

[0016]

However, in the above-mentioned conventional forceps stopper with a lid, the lid or the forceps stopper main body is subject to variations in the material of the lid or the forceps stopper main body and variations in the finished shape or dimensions of the product. There is a problem in that the fitting performance of the parts varies, and when only the lid is removed from the forceps stopper main body, not only the lid but also the forceps stopper main body may come off together. In addition, if the lid and the main body are not securely hermetically sealed, there is a problem that backflow leakage occurs therefrom.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a forceps stopper for an endoscope in which only a lid can be easily removed from a forceps stopper main body. Is to do.

[0018]

In order to solve the above-mentioned problems, a forceps stopper for an endoscope according to the present invention is made of a rubber material and protrudes from a distal end portion of the endoscope to perform treatment on an affected part. A treatment instrument insertion port of a substantially cylindrical treatment instrument insertion port member attached to a channel entrance that is an entrance to a treatment instrument channel, which is a conduit through which a treatment instrument passes, is configured to be removably attached by elastic fitting. (1) a fitting portion, a main body closing portion for closing the treatment instrument insertion port, and a penetrating portion which is provided to penetrate the main body closing portion and is inserted into the treatment instrument insertion member when the treatment tool is inserted from outside. Forceps stopper main body having a main body insertion portion to be made, and a substantially disk-shaped lid made of rubber material
In an endoscope forceps plug having a closing portion and a lid having a second fitting portion configured to be detachably attached to the forceps plug main body by elastic fitting, the forceps stopper for an endoscope is provided at an upper end portion of the treatment instrument insertion port member. Is
When the annular flange is formed so as to protrude
In addition, the outer part below the flange part has an outer periphery.
A groove to be wound is formed, and the cross section is substantially “inverted L” shape.
A forceps port fitting portion whose shadow shape is substantially annular is formed,
The first fitting portion is directed outward from the upper end of the main body closing portion.
A substantially annular flange formed so as to protrude therefrom;
A part formed to hang downward from the outer periphery of the part
An annular hanging part and a center part from the lower end of the hanging part
It has a substantially annular hook formed to protrude
The section surrounded by them has a substantially “L” -shaped cross section.
A first fitting space having a substantially annular planar projection shape is formed.
The inside diameter of the hook is larger than the outside diameter of the groove of the treatment tool insertion port member.
Is also set smaller by the first fitting rate,
A forceps port fitting portion fits into the first fitting space and the forceps plug
A main body is attached to the treatment instrument insertion port member, and the hook is
An inclined surface is formed at the outer lower end of the hanging part which is the back side of the part
The second fitting portion is perpendicular to the outer periphery of the lid closing portion.
A substantially cylindrical droop that is formed to hang downward
Part, and projecting inward from near the inner wall at the lower end of the hanging part.
A circle that expands as the inside surface goes upwards
Plane projecting cross section have a locking portion comprising a conical surface is substantially "I" shape
The shadow shape is formed in a substantially annular shape, and the lid closing portion and the second
The cross section is substantially disc-shaped due to the part surrounded by the fitting part.
2. A fitting space is formed, and a vertical portion of the hanging portion of the second fitting portion is formed.
A vertical outer wall of which the inner diameter of the inner wall portion is a hanging portion of the first fitting portion
Be set smaller than the outer diameter of the portion by the second fitting ratio
Thereby, the hanging part of the lid part is the hanging part of the forceps stopper main body part.
From the surroundings, and the locking portion of the lid is
Locked by the inclined surface of the outer lower end of the hanging part of the body,
The upper part of the forceps stopper main body is closed by the lid closing part,
The second fitting ratio is set to be smaller than the first fitting ratio .

In the above-mentioned forceps stopper for an endoscope, preferably, the lid is formed separately from the forceps stopper main body .

In the above-mentioned forceps stopper for an endoscope, preferably, the lid is formed integrally with the body of the forceps stopper .

In the above-mentioned endoscope forceps plug, preferably, the rubber of the lid portion in the second fitting portion is provided.
The hardness of the material is set to be greater than the hardness of the rubber material of the forceps stopper main body in the first fitting portion.

In the above-mentioned forceps stopper for an endoscope, preferably, the lid portion is formed so as to penetrate the lid closing portion.
The main body when the treatment tool is inserted from outside
It has a lid insertion portion that is inserted in the direction of the insertion portion .

[0023]

[0024]

[0025]

[0026]

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the endoscope forceps stopper according to the present invention will be described below in detail with reference to the drawings. Prior to the description of the configuration of the endoscope forceps plug, a detailed configuration of the forceps port member which is a treatment tool insertion port member to which the endoscope forceps plug is attached will be described. FIG. 1 shows a cross-sectional configuration of a forceps port member to which an endoscope forceps plug according to an embodiment of the present invention is attached.

As shown in FIG. 1, this forceps opening member 24
Is a substantially cylindrical member made of synthetic resin, metal, ceramic, or the like, and having both ends opened. The forceps opening member 24
The upper part of the figure has a large outer diameter part, and the lower part of the figure has a small outer diameter part.

An annular flange-shaped flange portion 24a is formed so as to protrude from the end of the large diameter portion toward the left and right sides in the figure. In the figure, a groove portion 24b having a substantially trapezoidal cross section is formed on the outer portion of the large diameter portion below the flange portion 24a so as to surround the outer periphery. The outer diameter of the outer surface of the large diameter portion in the groove 24b is set to Φ1. A portion formed by the flange portion 24a of the forceps opening member 24 and a portion connected therebelow and including the groove portion 24b has a substantially "reverse L" cross section and a substantially annular planar projection shape. (Hereinafter, referred to as a “forceps port fitting portion”).

The outer portion of the large-diameter portion below the groove 24b in the drawing is a cylindrical outer wall-like vertical outer wall 24h having a constant outer diameter in the vertical direction in the drawing. The outer diameter of the outer side surface of the vertical outer wall portion 24h is set to Φ3.

Further, on the outer surface of the small diameter portion, a male screw portion 24 is provided.
c is provided. The male screw portion 24c can be screwed into a female screw hole (not shown) formed in the forceps opening base 23 described above.

The inner surface of the large diameter portion of the forceps opening member 24 is a vertical inner wall portion 24d having a cylindrical inner wall shape having a constant inner diameter in the vertical direction in the figure. The inner surface of the small-diameter portion is a concave conical-shaped inclined inner wall portion 24e which is narrowed down so that the inner diameter decreases toward the bottom of the figure. The space surrounded by the vertical inner wall portion 24d forms a treatment instrument insertion port 24f. The opening 24g at the lower end of the inclined inner wall portion 24e in the figure communicates with the entrance (not shown; hereinafter, referred to as "channel entrance") of the treatment instrument channel (not shown) of the endoscope. Is configured. Hereinafter, 24 g is referred to as a “channel entrance communication port”.

With the above configuration, the male screw portion 24c of the forceps port member 24 is screwed into the female screw hole (not shown) of the forceps port base 23, thereby obtaining the state shown in FIG. Thus, the treatment instrument insertion port 24f communicates with the conduit space inside the treatment instrument channel.

(1) First Embodiment Next, the detailed configuration and operation of the endoscope forceps plug according to the first embodiment of the present invention, which is mounted on the forceps port member 24, will be described. FIG. 1 is a cross-sectional view showing a configuration of a forceps stopper for an endoscope according to a first embodiment of the present invention and a state of being attached to a forceps port member. FIG. 2 is an upper plan view showing a configuration of a lid of the endoscope forceps stopper shown in FIG.

As shown in FIG. 1, the endoscope forceps stopper is a forceps stopper with a separate lid, and is provided with a forceps stopper main body 25 and a lid 26.

The forceps stopper main body 25 is, as shown in FIG.
It is a substantially cylindrical member made of an elastic material including a rubber material such as silicon rubber, fluorine rubber, and nitrile butyl rubber.
The forceps stopper main body 25 includes a closing part 25a and a flange 25b.
, A hanging part 25c, and a hook 25d.

The closing portion 25a is a portion located at the center in the figure, and is formed in a substantially cylindrical shape. This closing part 2
5a, an insertion hole 25e, an inner chamber 25h, a slit 2
5 m and a guiding recess 25i are provided. Inner room 25h
Is a hollow space formed in a substantially spherical shape inside the closed portion 25a. Moreover, insertion holes 25e includes a vicinity of the center in the figure the upper surface in the closing portion 25 a, a small hole of substantially circular communicating the vicinity of the center of the portion corresponding to the ceiling portion of the inner chamber 25h.
There is no particular limitation on the inner diameter of the insertion hole 25e, and it is sufficient that the inner diameter be smaller than the outer diameter of the treatment tool to be inserted.

In addition, a slit 25m having a substantially one-letter shape is formed near the center of a portion corresponding to the bottom of the inner chamber 25h. A guide recess 25i communicates below the insertion hole 25m in the drawing. Induction recess 25i
Is a substantially columnar recess formed in the closing portion 25a from below in the figure.

The above-mentioned insertion hole 25e, inner chamber 25h,
The slit 25m and the guide recess 25i penetrate in the vertical direction in the drawing along the central axis of the closing portion 25a, and the upper portion of the closing portion 25a in the drawing forms a straight cylindrical portion 25p by these spaces and openings, The lower part in the figure of the closing part 25a constitutes the inclined cylindrical part 25r.

Further, from the upper end in the drawing of the straight cylindrical portion 25p of the closing portion 25a, a substantially annular flange 25
b is formed so as to bend and project substantially at a right angle.
The upper surface in the figure of the closing part 25a and the flange part 25b is formed substantially flat. Further, a substantially annular hanging portion 25c is formed to hang downward from the outer periphery of the flange portion 25b in the figure. The outer diameter of the vertical outer wall of the hanging portion 25c is set to Φ21. In addition, hanging part 2
A substantially annular hook 25d is formed to protrude from the lower end in the drawing of FIG. 5c toward the center. An inclined surface is formed at the outer lower end of the hanging portion 25c corresponding to the back side of the hook 25d.

With such a configuration, the outer surface of the straight cylindrical portion 25p in the closing portion 25a, the lower surface of the flange portion 25b, the inner wall surface of the hanging portion 25c, and the inner surface of the hook 25d (the hook 25d)
A portion surrounded by a flat upper surface, a vertical inner surface, and a slanted inner surface of the inside has a substantially “inverted L” cross section and a substantially annular planar projection shape. (Hereinafter, referred to as “first fitting space”) F11.
The inner diameter of the vertical inner surface of the hook 25d in the first fitting space F11 is set to D11.

The flange 25b, the hanging part 25c, and the hook 25d (hereinafter referred to as "first fitting part") of the forceps plug main body 25 corresponding to the first fitting space F11 have a cross section. It is formed in a substantially “L” -shape such that the planar projection shape is substantially annular.

In the above, the straight cylindrical portion 25 of the closing portion 25a
The outer diameter of p is set to be slightly larger than the inner diameter of the vertical inner wall portion 24d of the forceps opening member 24. The cross-sectional shape of the first fitting space F11 in the forceps plug main body 25 is set to be smaller than the cross-sectional shape of the above-described forceps port fitting portion at the upper end of the forceps port member 24. In particular, the outer diameter Φ1 of the groove 24b of the forceps opening member 24 and the inner diameter D11 of the vertical inner surface of the hook 25d of the forceps stopper main body 25.
Is set such that the following relationship is established: D11 <Φ1 (1)

The following equation is established between the inner diameter D11 of the vertical inner surface of the hook 25d and the outer diameter Φ1 of the groove 24b: D11 = Φ1-T11 (2) Is set to In the above equation (2), T11 is the outer diameter Φ1 of the groove 24b and the hook 25d.
The inner diameter of the hook 25d of the forceps stopper main body 25 is smaller than the outer diameter of the groove 24b of the forceps opening member 24 by T11.

Next, the detailed structure and operation of the lid 26 attached to the forceps stopper main body 25 will be described.

As shown in FIG. 1, the lid 26 is a member made of an elastic material including a rubber material such as silicon rubber, fluorine rubber, or nitrile butyl rubber, and is formed separately from the forceps stopper main body 25. I have. The elastic material forming the lid 26 has a higher hardness than the elastic material forming the forceps plug main body 25. For example, in the case of a rubber material, the rubber hardness of the rubber material forming the forceps stopper body 25 is 30 degrees, while the rubber hardness of the rubber material forming the lid 26 is 40 degrees. I have. The rubber hardness is a hardness according to a “spring type” defined in JIS (Japanese Industrial Standard). In addition, the lid 26 is shown in FIGS.
As shown in the figure, the structure includes a closing portion 26a, a hanging portion 26b, a connecting portion 26c, and an annular portion 26d.

The closing portion 26a is a portion located at the center of the flat plate portion in the drawing, and the upper surface and the lower surface in the drawing are each formed in a substantially disk shape with a flat shape. The closing portion 26a is not provided with an opening such as a slit or a small hole.

A substantially cylindrical hanging portion 2 is provided on the lower surface in the figure near the outer periphery of the closing portion 26a.
6b is formed so as to hang down. The inner diameter of the vertical inner wall surface of the hanging portion 26b is set to D21. In the vicinity of the inner wall at the lower end of the hanging portion 26b in the drawing, a locking portion 26h having a substantially triangular cross section and a substantially annular planar projection shape projects inward in the drawing. The inner surface in the drawing of the locking portion 26h is formed in an inclined surface shape. This inclined surface is a conical surface that expands in diameter toward the outside (upper part in the drawing) along the central axis of the closing part 26a.

With such a configuration, the lower surface of the closing portion 26a in the drawing, the vertical wall-shaped inner surface of the hanging portion 26b,
A portion surrounded by the inclined inner surface of the locking portion 26h forms a substantially disk-shaped or substantially columnar space (hereinafter, referred to as a "second fitting space") F21. Therefore, the inner diameter of the second fitting space F21 is D21.

The hanging portion 26b and the locking portion 26h (hereinafter, referred to as "second fitting portion") of the lid portion 26 corresponding to the above-mentioned second fitting space F21 have a substantially "L" cross section. And a planar projection shape is formed in a substantially annular shape. However, the locking part 2
6b is not substantially protruded in the lateral direction, and the engagement surface is an inclined surface, so that the cross-section is almost substantially "I" shaped. Therefore, the second fitting portion has a simpler shape than the first fitting portion of the forceps plug main body 25 described above.

One end of a substantially band-like or rod-like connecting portion 26c is connected to the outer edge of the closing portion 26a. The other end of the connecting portion 26c has a substantially annular annular portion 26d.
Is connected. The inner diameter of the inner surface of the ring in the annular portion 26d is set to D31. Also, the connecting portion 26c
A handle 26f protrudes outward in the drawing from the outer edge of the closing portion 26a opposite to the portion where the is connected.

In the above description, the inner diameter D21 of the vertical inner wall portion of the hanging portion 26b is set to be smaller than the outer diameter Φ21 of the vertical outer wall portion of the hanging portion 25c of the forceps plug body 25. The following equation is established so that the following relationship is established: D21 <Φ21 (3)

The following formula is established between the inner diameter D21 and the outer diameter φ21: D21 = φ21−T21 (4) In the above equation (4), T21 represents the difference between the outer diameter Φ21 and the inner diameter D21, and the inner diameter of the hanging part 26b of the lid part 26 with respect to the outer diameter of the hanging part 25c of the forceps plug main body 25. Is smaller by T21.

The inner diameter D31 inside the annular portion 26d
Is set to be smaller than the outer diameter Φ31 of the outer surface of the vertical outer wall portion 24h of the forceps opening member 24, and the following relationship is established between the two: D31 <Φ31 (5) It is set as follows.

Further, between the inner diameter D31 and the outer diameter Φ31, the following equation is established: D31 = Φ31−T31 (6) In the above equation (6), T31 represents the difference between the outer diameter Φ31 and the inner diameter D31, and the inner diameter of the annular portion 26d of the lid 26 with respect to the outer diameter of the vertical outer wall 24h of the forceps opening member 24. Is smaller by T31.

In addition to the above, in the present embodiment, it is set so that the following relationship is established between T11 and T21: T21 <T11 (7)

With the above configuration, first, the lid 26
Of the forceps port member 2
4, the elasticity of the annular portion 26 d securely locks the annular portion 26 d to the vertical outer wall 24 h of the forceps opening member 24, and the annular portion 26 d of the lid 26 is fitted to the forceps opening member 24. Be attached.

In this state, the inner diameter of the annular portion 26d is T
The annular portion 26d is tightening the vertical outer wall portion 24h from the surroundings by an elastic repulsion force corresponding to the deformation amount. This T31 is hereinafter referred to as "tightening margin" of the annular portion 26d.

The tightening margin may be expressed by a length or a ratio of the tightening margin to the diameter of the object to be tightened (hereinafter, referred to as “tightening ratio”). For example, in the case of the endoscope forceps stopper shown in FIGS.
When the outer diameter Φ3 of the vertical outer wall portion 24h is 13.0 mm, the tightening margin T31 of the annular portion 26d is 2.0 mm,
Expressed as a tightening rate, it was about 15%.

Next, the hook 25d of the forceps stopper main body 25 is pushed to the left and right in the figure, and the closing portion 25a is inserted into the treatment instrument insertion port 24.
f, the forceps-port fitting portion of the forceps-port member 24 is moved to the first position of the forceps-plug body 25 by the elasticity of the forceps-plug body 25.
The forceps plug main body 25 is securely fitted to the fitting space F11, and is attached to the forceps opening member 24. In this state, the closing portion 25a of the forceps plug main body 25 is inserted into the upper portion of the treatment instrument insertion port 24f of the forceps port member 24, and the treatment instrument insertion port 24f is closed by the closing portion 25a.

In this state, the inner diameter of the hook 25d of the forceps stopper main body 25 is enlarged by T11, and the hook 25d is formed by the elastic repulsion force corresponding to the amount of deformation.
b is tightened from the periphery. This T11 is hereinafter referred to as “tightening” of the forceps stopper main body 25.

For example, in the case of the endoscope forceps stopper shown in FIGS. 1 and 2, the outer diameter Φ 1 of the groove 24 b of the forceps opening member 24 is 1
In the case of 2.7 mm, the tightening margin T11 of the forceps stopper body 25 is used.
Was 1.0 mm, which was approximately 8% in terms of the tightening rate.

Next, the connecting portion 26d of the lid 26 is bent by elasticity, and the lower surface of the closing portion 26a of the lid 26 in the drawing is directed to the upper surface side of the forceps plug main body 25 in the drawing.
Pushing the locking portion 26h to the left and right sides in the figure, the closing portion 26a
Is pressed against the upper surface in the figure of the forceps stopper main body 25,
Due to the elasticity of the lid portion 26, the locking portion 26h of the lid portion 26 is securely fitted to the inclined surface of the outer lower end of the hanging portion 25c of the forceps plug main body portion 25, and the lid portion 26 is attached to the forceps plug main body portion 25. You.
In this state, the forceps stopper main body 25 and the lid 26 are
The forceps stopper body 2 is locked by the inclined engagement surface S,
The upper part in the drawing of FIG. 5 is closed by the closing part 26a of the lid part 26, and becomes the state shown in FIG.

In this state, the hanging part 2 of the lid 26
The inner diameter of 6b is enlarged by T21, and the hanging portion 26b clamps the hanging portion 25c of the forceps plug main body 26 from the periphery by an elastic repulsion force corresponding to the deformation amount. This T
Hereinafter, 21 is referred to as “tightening margin” of the lid 26.

For example, in the case of the endoscope forceps stopper shown in FIGS. 1 and 2, the outer diameter Φ 21 of the hanging portion 25 c of the forceps stopper main body 25.
Is 19.0 mm, the tightening margin T21 of the lid 26 is 0.8 mm, which is about 4% in terms of a tightening ratio.

As shown in the above equation (7), the cover 2
The tightening margin T21 of the forceps stopper main body 25 is the same as the tightening margin T11
It is set smaller than. Therefore, the force by which the hanging portion 26b of the lid 26 tightens the hanging portion 25c of the forceps plug main body 26 from the surroundings is greater than the force by which the hooks 25d of the forceps plug main body 25 tighten the grooves 24b of the forceps opening member 24 from the surroundings. It is set small. Further, as described above, the hardness of the material of the lid 26 is set to be larger than the hardness of the material of the forceps stopper main body 25. Further, the shape of the second fitting portion of the lid 26 is set to a simpler shape than the shape of the first fitting portion of the forceps plug main body 25. from these things,
The lid 26 has a smaller fitting force than the forceps stopper main body 25 and is set so that it can be easily removed. When only the lid 26 is to be removed, the forceps stopper main body 25 are prevented from coming off together.

The forceps stopper for an endoscope according to the first embodiment has the same or higher performance as that of the conventional one in terms of the performance of inserting the treatment instrument and the performance of preventing backflow of body fluids and the like. Hereinafter, this point will be briefly described.

Next, the lid 26 is removed from the forceps stopper main body 25, and a treatment tool (not shown) is pushed downward from the upper end of the insertion hole 25e of the forceps stopper main body 25 in the figure. The distal end of the treatment tool pushes and expands the insertion hole 25e to enter the lower part of the figure, enters the inner chamber 25h below the figure from the lower end of the slit 26e, pushes and expands the slit 25m to enter the guide recess 25i. .

In the guiding recess 25i, the slit 25
The cylindrical body of the guiding recess 25i surrounds the periphery from the outlet of m below. Since the inner wall of the guide recess 25i has a vertical cylindrical inner wall shape, even when the distal end of the treatment tool advances diagonally downward in the drawing, the surface of the inner wall of the guide recess 25i vertically extends the treatment tool tip. Guide down.

Therefore, even when the treatment instrument has a small diameter and is very easy to bend like a cannulation tube when used as a duodenoscope, or if the distal end of the cannulation tube is further bent. Even if it is, the distal end of the tube can be guided toward the inside of the treatment instrument channel, and good insertion performance can always be exhibited regardless of the diameter of the treatment instrument.

When the treatment tool is further pushed in, the treatment tool moves downward in the figure, passes through the guiding concave portion 25i, and is inserted into the forceps stopper main body 2
5 protrudes from the lower end of the closing portion 25a, and is inserted into a treatment instrument channel (not shown) from a channel inlet communication port 24g below the figure.

When the treatment tool is completely inserted into the treatment tool channel as described above, the treatment tool is first tightened from the surroundings in the slit 25m of the forceps plug main body 25, and the body fluid, The mixed fluid of air and air is once blocked at this position.

However, if there is a large difference between the atmospheric pressure inside the body cavity causing the backflow and the atmospheric pressure outside the forceps plug, the slit 2
The fluid gradually leaks into the inner chamber 25h from between 5m and the treatment tool. However, since the inner chamber 25h is a space whose volume is expanded relatively larger than the gap of the slit 25m, the pressure of the fluid is reduced by jetting into the inner chamber 25h.

Therefore, in the insertion hole 25e, it is only necessary to prevent the backflow caused by the difference between the fluid in the inner chamber 25h in which the backflow pressure has been reduced as described above and the atmospheric pressure outside the forceps plug, and sufficient leakage It can perform a prevention function.

Since the inner chamber 25h is a space whose volume is relatively large and expanded, a backflow fluid can be temporarily stored in this portion. As described above, the endoscope forceps stopper composed of the forceps stopper main body 25 and the lid 26 has the inner chamber 25h, and therefore has the effect of reducing the backflow pressure and the effect of storing the backflow material, and has a synergistic effect to cause the backflow. The leakage prevention performance is improved.

(2) Second Embodiment Next, the detailed configuration and operation of the endoscope forceps plug according to the second embodiment of the present invention, which is mounted on the forceps port member 24 described above, will be described. FIG. 3 is a cross-sectional view showing a configuration of a forceps stopper for an endoscope according to a second embodiment of the present invention and a state of being attached to a forceps port member. FIG. 4 is a cross-sectional view showing the configuration of the endoscope forceps stopper shown in FIG. 3 in a state where the lid is removed from the forceps stopper body.

As shown in FIGS. 3 and 4, the endoscope forceps plug 27 is a forceps plug with an integral lid,
8, a lid 29, and a connecting part 30.

As shown in FIGS. 3 and 4, the forceps stopper main body 28 is a substantially cylindrical member made of an elastic material including a rubber material such as silicon rubber, fluorine rubber, or nitrile butyl rubber. The forceps stopper main body 28 includes a closing portion 28a and a flange 2
8b, a hanging portion 28c, and a hook portion 28d. The closing portion 28a is provided with an insertion hole 28e, an inner chamber 28h, a slit 28m, and a guiding recess 28i.

As shown in FIGS. 3 and 4, the lid portion 29 is a member made of an elastic material containing a rubber material such as silicone rubber, fluorine rubber, or nitrile butyl rubber. It is formed integrally. Further, as shown in FIGS.
And a hanging portion 29b. Closing part 29
A is provided with a handle 29f, and a hanging portion 29b is provided with a locking portion 29h and a notch 29i.

Of these components, the forceps stopper main body 2
8, the configuration and operation of the closing portion 28a, the flange portion 28b, the hanging portion 28c, and the hook portion 28d are the same as those of the closing portion 25a, the flange portion 25b, the hanging portion 25c, and the hook portion 25d in the forceps plug main body 25 in the first embodiment. The configuration and operation are the same.
Further, the insertion hole 28e in the closing portion 28a and the inner chamber 28h
The configuration and operation of the slit 28m and the guiding recess 28i are as follows.
The configuration and operation of the insertion hole 25e, the inner chamber 25h, the slit 25m, and the guiding recess 25i in the closing portion 25a of the first embodiment are the same.

The outer surface of the straight tube portion 28p in the closing portion 28a of the forceps stopper main body 28, the lower surface of the flange 28b,
The inner wall surface of the hanging part 28c and the inner surface of the hook 28d (the hook 28
The portion surrounded by a flat upper surface, a vertical inner surface, and an inclined inner surface inside d has a substantially “inverted L” cross section and a substantially circular planar projection shape. An annular first fitting space F12 is formed, and its configuration and operation are the same as those of the first fitting space F11 in the first embodiment. Further, the flange 28 of the forceps stopper main body 28 corresponding to the first fitting space F12 is provided.
The b, the hanging part 28c, and the hook part 28d constitute a first fitting part. The inner diameter of the vertical inner surface of the hook 28d in the first fitting space F12 is set to D12.

The construction and operation of the closing portion 29a and the hanging portion 29b of the lid 29 are the same as those of the lid 26 of the first embodiment.
The configuration and operation of the closing portion 26a and the hanging portion 26b are the same. The configuration and operation of the handle portion 29f and the locking portion 29h are the same as the configuration and operation of the handle portion 26f and the locking portion 26h.

The portion surrounded by the lower surface of the closing portion 29a of the lid portion 29 in the drawing, the vertical wall-like inner surface of the hanging portion 29b, and the inclined inner surface of the locking portion 29h is:
A substantially disk-shaped or substantially columnar second fitting space F22 is formed, and its configuration and operation are the same as those of the second fitting space F21 in the first embodiment. The hanging portion 29b and the locking portion 29h of the lid 29 corresponding to the second fitting space F22 constitute a second fitting portion. The inner diameter of the second fitting space F22 is set to D22. The outer diameter of the vertical outer wall of the hanging portion 28c of the forceps plug main body 28 corresponding to the second fitting space F22 is set to Φ22.

The structure and operation of the connecting portion 30 are the same as those of the connecting portion 26c in the first embodiment.

The endoscope forceps stopper 27 of the second embodiment is different from the endoscope forceps stopper of the first embodiment in that it is integrally formed of the same material,
b is provided with a notch 29i, and the tightening margin (tightening rate) of the forceps plug main body is different from that of the first embodiment. Other points are almost the same as those of the first embodiment.

Hereinafter, the above points which are different from the first embodiment will be described. First, as for the notch 29i, the notch 29i described above is provided below the vicinity of the lower end of the hanging portion 29b where the connecting portion 30 is connected, and is a concave portion larger than the connecting portion 30. This notch 29i
As shown in FIG. 3, when the forceps stopper main body 28 is attached to the forceps opening member 24 and the lid 29 is further attached to the forceps stopper main body 28, it is accommodated in the hanging part 29b so that the connecting part 30 does not interfere. It is provided in order to.

Next, will be described. First, in the endoscope forceps stopper according to the second embodiment, the cross-sectional shape of the first fitting space F12 in the forceps plug main body 28 is smaller than the cross-sectional shape of the forceps port fitting portion at the upper end of the forceps port member 24. Is also set to be small, and the groove 24b of the forceps port member 24 is set.
Is set so that the following equation is established between the outer diameter Φ1 of the forceps and the inner diameter D12 of the vertical inner surface of the hook portion 28d of the forceps plug main body 28. D8 <Φ1 (8) ing.

The following equation is established between the inner diameter D11 of the vertical inner surface of the hook 28d and the outer diameter Φ1 of the groove 24b: D12 = Φ1-T12 (9) Is set to In the above equation (9), T12 is the outer diameter Φ1 of the groove 24b and the hook 28d.
The inner diameter of the hook 28d of the forceps stopper main body 28 is smaller than the outer diameter of the groove 24b of the forceps opening member 24 by T12.

Therefore, as shown in FIG. 3, when the forceps stopper main body 28 is attached to the forceps opening member 24, the inner diameter of the hook 28d of the forceps stopper main body 28 is enlarged by T12. The hook 28 is formed by elastic repulsion according to the amount.
d fastens the groove 24b from the periphery. This T12
Hereinafter, this is referred to as “tightening” of the forceps stopper main body 28 of the second embodiment. The ratio of the tightening margin to the diameter Φ1 of the tightened object is called a tightening ratio.

The inner diameter D22 of the vertical inner wall of the hanging part 29b of the lid part 29 is the hanging part 28c of the forceps stopper main body 28.
Is set so as to be smaller than the outer diameter Φ22 of the vertical outer wall portion, and the following equation is established between them: D22 <Φ22 (10)

The following formula is established between the inner diameter D22 and the outer diameter Φ22: D22 = Φ22−T22 (11) The above equation (11)
, T22 represents the difference between the outer diameter Φ22 and the inner diameter D22, and the inner diameter of the hanging portion 29b of the lid portion 29 is smaller than the outer diameter of the hanging portion 28c of the forceps plug main body 28 by T22. ing.

Therefore, as shown in FIG. 3, when the lid 29 is mounted after the forceps plug main body 28 is mounted on the forceps opening member 24, the inner diameter of the hanging portion 29b of the lid 29 is T.
The hanging part 29b is enlarged by the elastic repulsive force corresponding to the amount of deformation, so that the hanging part 29b
c is tightened from the periphery. This T22 is hereinafter referred to as “tightening margin” of the lid portion 29. Also, the diameter of the tightened object Φ22
The ratio of the tightening margin to is called the tightening rate.

In addition to the above, in the second embodiment, it is set so that the following relationship is established between T12 and T22: T22 <T12 (12)

For example, in the case of the endoscope forceps stopper shown in FIGS. 3 and 4, the outer diameter Φ 1 of the groove 24 b of the forceps opening member 24 is 1
In the case of 2.7 mm, the tightening margin T12 of the forceps stopper main body 28 is used.
Was 1.0 mm, which was approximately 8% in terms of the tightening rate.

For example, in the case of the endoscope forceps stopper shown in FIGS. 3 and 4, when the outer diameter Φ22 of the hanging portion 28c of the forceps stopper main body 28 is 19.0 mm, the cover 29 is tightened. White T
22 was 0.8 mm, which was about 4% in terms of the tightening rate.

Therefore, in the case of the second embodiment, as shown in the above equation (12), similarly to the first embodiment, the tightness of the lid is smaller than that of the forceps stopper main body. Is set small. However, in the case of the second embodiment, the tightening margin of the lid with respect to the tightening margin of the forceps stopper main body (or the tightening rate of the lid with respect to the tightening rate of the forceps stopper main body) is higher than in the case of the first embodiment. Is relatively small. Accordingly, the lid 29 is supplemented so as to prevent the forceps stopper main body 28 from being easily detached due to being formed of the same material as the forceps stopper main body 28. Conversely, the forceps stopper main body 28 is relatively hard to come off.

The shape of the second fitting part of the lid part 29 is set to a simpler shape than the shape of the first fitting part of the forceps plug main body part 28. For these reasons, the lid portion 29 has a smaller fitting force than the forceps plug main body portion 28 and is set so that it can be easily removed. It is prevented that the parts 28 come off together.

The endoscope forceps stopper according to the second embodiment is
The insertion performance of the treatment tool and the performance of preventing backflow of body fluids and the like are also equal to or better than those of the conventional one. The operation in this case is the same as in the case of the first embodiment, and a description thereof will be omitted.

In each of the above embodiments, the forceps opening member 24 corresponds to a treatment tool insertion opening member. The closing portions 25a and 28a correspond to main body closing portions. Also,
The insertion hole 25e and the slit 25m and the insertion hole 28e and the slit 28m correspond to a main body insertion portion. The closing portions 26a and 29a correspond to lid closing portions. The tightening margins T11 and T12 correspond to a first fitting margin. The tightening margins T21 and T22 correspond to a second fitting margin. The body part tightening rate, which is the ratio of the tightening margins T11 and T12 of the forceps stopper body to the outer diameter Φ1 of the groove 24b of the forceps opening member 24, corresponds to the first fitting rate. In addition, the hanging portions 25c, 2 of the forceps stopper body portions 25, 28
The lid tightening rate, which is the ratio of the tightening margins T21 and T22 of the lids 26 and 29 to the outer diameters Φ21 and Φ22 of 8c, corresponds to the second fitting rate.

The present invention is not limited to the above embodiments. Each of the above embodiments is merely an example, and has substantially the same configuration as the technical idea described in the claims of the present invention, and those having the same functions and effects are:
Anything is included in the technical scope of the present invention.

For example, in each of the above-described embodiments, the slit (25
m, 28m) and the small holes (25e, 28e) have been described as examples, but the present invention is not limited thereto, and the treatment is performed when the treatment tool is inserted from the outside and is provided so as to penetrate the closed portion. Any means may be used as long as it can be inserted into the inside of the component insertion member, and a main body insertion portion of another shape, for example, a slit or the like opened in a substantially cross shape in the closing portion may be used. . Alternatively, a combination of a small hole at the center and a slit at the side may be used.

In each of the above embodiments, the forceps port member 24 as the treatment tool insertion port member is located at the uppermost position in FIG. 5A or the eyepiece side in the operation section 2 of the endoscope 100. Although the example in which the treatment tool insertion port member is disposed at the position has been described, the present invention is not limited to this.
That is, it may be provided at a position below the operation unit 2 or at a position near the object side. In addition, the entire configuration of the endoscope 100 and the configuration of the forceps port member 24 as the treatment tool insertion port member may be configurations other than the configuration described in the above embodiment.

The present invention is not limited to the above embodiments, but may be any other form of endoscope forceps stopper, for example, a cover of each embodiment may be provided with a lid insertion portion such as a slit or a small hole. You may. With this configuration, the forceps stopper can be used as a double-structured forceps stopper, and the performance of preventing the forceps stopper from leaking can be further enhanced. However, when an insertion hole or the like is provided in the lid as described above, an insertion / extraction force acts on the lid when a treatment tool such as a forceps is inserted / extracted. Clamping force) needs to be set at least larger than this insertion / extraction force. The lid is detached from the main body of the forceps plug when the treatment tool is easy to bend, and used as a single forceps plug. You may.

In each of the above embodiments, in order to make the lid easier to remove than the forceps stopper main body, in the first embodiment, the second fitting margin of the lid is smaller than that of the forceps stopper main body. And an example in which the hardness of the lid portion is increased, and the shape of the second fitting portion of the lid portion is made simpler. In the second embodiment, compared to the forceps stopper main body, Although the example in which the second fitting margin of the lid portion is made smaller and the shape of the second fitting portion of the lid portion is made simpler has been described, the present invention is not limited thereto. May be set independently, or may be set in combination as appropriate. For example, the lid may be made harder only with the same fitting margin and the hardness may be changed, or only the shape of the second fitting part may be simplified with the same fitting margin. In addition, the fitting force of the lid portion to the forceps stopper body by the second fitting portion is set to be smaller than the fitting force of the forceps stopper body to the treatment instrument insertion port member by the first fitting portion. Any type may be used.

Further, the inner diameter of the forceps plug main body portion in the first fitting portion is set smaller than the outer diameter of the treatment tool insertion port member corresponding to the first fitting portion by the first fitting rate, and the second fitting portion is provided. The inner diameter of the lid portion in the joint portion is set to be smaller than the outer diameter of the forceps plug main body portion corresponding to the second fitting portion by the second fitting ratio, and the second fitting ratio is the first fitting ratio. You may make it set smaller than a rate. Further, the values of the tightening rate in each of the above embodiments are not limited to these, and the tightening margins (T11, T12) of the forceps stopper main body with respect to the outer diameter Φ1 of the groove 24b of the forceps opening member 24 are not limited thereto. The body part tightening rate is 6
The forceps stopper main body (2
5, 28) outside diameter (Φ2
Tightening margin (T2) of the lid (26, 29) against (1, Φ22)
1, T22) may be in the range of about 3 to 5%, and the annular portion is the ratio of the interference (T31) of the annular portion to the outer diameter Φ3 of the vertical outer wall 24h. The tightening rate may be in the range of about 13 to 17%.

[0106]

As described above, according to the endoscope forceps stopper according to the present invention, there is provided a treatment tool which is made of a rubber material and protrudes from the distal end of the endoscope to perform treatment on an affected part. A first fitting which is configured to be elastically fitted to and removable from a treatment tool insertion port of a substantially cylindrical treatment tool insertion port member attached to a channel inlet which is an inlet to a treatment tool channel which is a conduit passing therethrough. Body, a main body closing portion for closing the treatment instrument insertion port, and a main body insertion provided so as to penetrate the main body closing portion and for inserting the treatment instrument from the outside into the inside of the treatment instrument insertion port member. Cap body having a portion, a substantially disc-shaped lid closing portion made of a rubber material, and a second detachably configured to be elastically fitted to the forceps plug body.
In an endoscope forceps stopper provided with a lid having a fitting portion,
An annular flange-shaped franc is provided at the upper end of the treatment instrument insertion port member.
The flange is formed so as to protrude, and
A groove is formed around the outer periphery in the outer part below the
And the cross section is substantially "inverted L" shape and the planar projection shape is substantially annular
Is formed, and the first fitting portion is
So that it protrudes outward from the upper end of the body
A substantially annular flange formed, and a lower portion from an outer periphery of the flange.
A generally annular hanging part formed to hang toward
And project from the lower end of the hanging part toward the center side.
Has a substantially annular hook formed in the
The cross section is approximately "L" shaped due to the enclosed part, and the planar projection shape is
A substantially annular first fitting space is formed, and the inside diameter of the hook is
A first fitting rate greater than the outer diameter of the groove of the treatment tool insertion opening member;
By setting the forceps port fitting portion
The forceps stopper main body is fitted into the first fitting space and
It is attached to the fixture insertion port member, and is
An inclined surface is formed at an outer lower end of the hanging portion,
The fitting portion extends vertically downward from the outer periphery of the lid closing portion.
A substantially cylindrical hanging part formed so as to be lowered, and the hanging part
Protruding inward from near the inner wall at the lower end of the part
A conical surface that expands in diameter as the inside surface goes upward
Section, the cross section is substantially "I" shaped, and the planar projection shape is substantially annular.
Formed in a shape, by the lid closing portion and the second fitting portion.
The enclosed portion forms a second fitting space having a substantially disk-shaped cross section.
Inner diameter of a vertical inner wall portion of the hanging portion of the second fitting portion
Is smaller than the outer diameter of the vertical outer wall portion of the hanging portion of the first fitting portion.
By being small set only the second fitting rate, the lid
The hanging part of the part clamps the hanging part of the main body of the forceps stopper from the periphery.
Attachment, the locking portion of the lid portion is the hanging portion of the forceps stopper body
Locked by the inclined surface of the outer lower end, the forceps stopper body
The upper part is closed by the lid closing part, and the second fitting ratio
Is configured to be set smaller than the first fitting rate , so that only the lid can be easily removed from the forceps plug main body, and the predetermined backflow leakage prevention performance and treatment tool insertion performance can be improved. Can be demonstrated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a forceps stopper for an endoscope according to a first embodiment of the present invention and a state of being attached to a forceps port member.

FIG. 2 is an upper plan view showing a configuration of a lid in the endoscope forceps stopper shown in FIG. 1;

FIG. 3 is a cross-sectional view illustrating a configuration of a forceps stopper for an endoscope according to a second embodiment of the present invention and a state of being attached to a forceps port member.

4 is a cross-sectional view showing a configuration of the endoscope forceps stopper shown in FIG. 3 in a state where a lid is removed from a forceps stopper main body.

FIG. 5A is a perspective view showing an entire configuration of an example of an endoscope to which an endoscope forceps plug is attached, and a configuration of a conventional endoscope forceps plug. FIG. 5B is a front view showing the configuration of the distal end portion of the endoscope shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Internal insertion part 2 Operation part 3 Connector code part 10 Tip part 11 Curved part 12 Flexible part 13 Illumination lens 14 Objective lens 15 Air supply / water supply nozzle 16 Suction / treatment port 20 Grip part 21a Vertical angle knob 21b Left and right angle knob 22a Suction button 22b Air supply / water supply button 23 Forceps port base 24 Forceps port member 24a Flange section 24b Groove section 24c Male thread section 24d Vertical inner wall section 24e Inclined inner wall section 24f Treatment tool insertion port 24g Channel inlet communication port 24h Vertical outer wall section 25 Forceps stopper Body 25 'Forceps plug 25a Closed part 25b Flange 25c Hanging part 25d Hook 25e Insertion hole 25e' Slit 25h Inner chamber 25i Induction recess 25m Slit 25p Straight tube part 25r Inclined tube part 26 Cover part 26a Closed part 26c Hanging part 26c Part 26d Annular part 26f Handle part 26h Locking part 27 Forceps plug 28 Forceps plug main body 28a Closed part 28b Flange part 28c Hanging part 28d Hook part 28e Insertion hole 28h Inner chamber 28i Induction concave part 28m Slit 28p Straight cylindrical part 28r Inclined cylindrical part 29 Lid 29a closing part 29b hanging part 29f handle part 29h locking part 29i notch part 30 connecting part 100 endoscope F11, F12 first fitting space F21, F22 second fitting space S engaging surface

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A61B 1/00-1/32

Claims (5)

(57) [Claims] 1. An endoscope which is made of a rubber material and is attached to a channel entrance which is an entrance to a treatment instrument channel which is a conduit through which a treatment instrument for performing treatment or the like on an affected part is protruded from a distal end portion of an endoscope and passes therethrough. A first fitting portion configured to be removably attachable to the treatment instrument insertion port of the substantially cylindrical treatment instrument insertion port member by elastic fitting, a main body closing section for closing the treatment instrument insertion port, and the main body closing section And a forceps stopper main body having a main body insertion portion through which the treatment tool is inserted from the outside when the treatment tool is inserted from the outside, and a substantially disc-shaped lid closure made of a rubber material parts and, in the endoscope forceps plug provided with a lid portion having a second engagement portion which is detachably attached to an elastic fit on the forceps plug body portion, the upper end portion of the treatment instrument insertion port member Annular collar flan
The flange is formed so as to protrude, and
A groove is formed around the outer periphery in the outer part below the
And the cross section is substantially "inverted L" shape and the planar projection shape is substantially annular
Is formed, and the first fitting portion extends outward from the upper end of the main body closing portion.
A substantially annular flange formed so as to project toward
It is formed to hang downward from the outer periphery of the collar.
A substantially annular hanging portion, and a center portion from a lower end of the hanging portion.
It has a substantially annular hook formed to project toward
The cross section is substantially “L” due to the portion surrounded by these.
A first fitting space is formed having a substantially annular shape with a substantially circular shape when projected in a U-shape.
The inside diameter of the hook is outside the groove of the treatment tool insertion port member.
By setting the first fitting rate smaller than the diameter,
The forceps port fitting portion fits into the first fitting space and
The forceps stopper main body is attached to the treatment tool insertion port member, and
Inclined at the outer lower end of the hanging part, which is the back side of the hook
A surface is formed, and the second fitting portion extends vertically downward from the outer periphery of the lid closing portion.
A substantially cylindrical hanging portion formed so as to hang down,
Protruding inward from near the inner wall at the lower end of the hanging part
With a conical surface that expands in diameter as the inner surface goes up
Having a substantially “I” -shaped cross-section and a planar projection shape
Are formed in a substantially annular shape, and the lid closing portion and the second fitting portion
The second fitting whose cross section is substantially disc-shaped by the portion surrounded by
Space is made form a vertical inner wall of the suspended portion of the second fitting portion
The inside diameter of the portion is outside the vertical outer wall portion of the hanging portion of the first fitting portion.
By being set smaller than the diameter by the second fitting ratio.
The hanging part of the lid part surrounds the hanging part of the forceps stopper main body part.
And tighten the locking portion of the lid so that the forceps stopper body
The forceps locked by the inclined surface of the outer lower end of the hanging part
An endoscope forceps stopper , wherein an upper part of the stopper body is closed by the lid closing part, and the second fitting rate is set to be smaller than the first fitting rate . 2. The forceps stopper for an endoscope according to claim 1, wherein the lid is formed separately from the body of the forceps stopper. 3. The endoscope forceps stopper according to claim 1, wherein said lid is formed integrally with said forceps stopper main body . 4. A forceps for an endoscope plug according to claim 2 or 3, wherein the hardness of the rubber material of the lid portion in the second fitting part, the forceps plug body in said first fitting portion Part of the go
A forceps stopper for an endoscope, wherein the stopper is set to be larger than a hardness of a material of the endoscope. 5. The method of claim 1 Symbol placement endoscopic forceps plug of the lid, before provided to penetrate through the lid closure portion
When the treatment instrument is inserted from outside,
A forceps stopper for an endoscope, comprising a lid insertion portion for insertion in a direction .