JP2001231748A - Forceps plug of endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forceps plug of an endoscope having excellent hermeticity to substantially prevent leakage from a slit segment in a state inserted with an implement. SOLUTION: The forceps plug is so constituted that a plug part 24 is press fitted into a plug receiving hole 16 in the direction perpendicular to the longitudinal direction of the slit 27 so as to create a clearance between the plug part 24 and the plug receiving hole 16 in the longitudinal direction of the slit 27 when the plug part 24 is in the state of being fitted into the plug receiving hole 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forceps stopper for an endoscope disposed at an entrance of a treatment instrument insertion passage of the endoscope.

[0002]

2. Description of the Related Art A forceps stopper of an endoscope is used to plug an entrance portion of a treatment tool insertion passage so that a body fluid or the like is not spouted through the treatment tool insertion passage. When inserting and removing, it must not require a special operation of opening and closing the stopper.

Therefore, the forceps stopper of the endoscope is generally formed on a lid made of a resilient material which is detachably attached to the entrance of the treatment instrument insertion passage of the endoscope, and formed on the entrance of the treatment instrument insertion passage. A plug portion that can be inserted and removed from the plug receiving hole is formed, and normally maintains a closed state due to its own elasticity, and is expanded by a treatment tool inserted into and removed from the treatment tool insertion passage. A slit having a "" shape is formed in the plug.

[0004]

However, as shown in FIG. 10, when the treatment tool 100 is passed through the "-"-shaped slit 51, the slit 51 is spread over the entire width. A gap 52 is formed in the slit 51 in a portion where 100 does not pass, and a waste liquid or the like leaks out therefrom.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a forceps stopper for an endoscope having an excellent hermeticity that is unlikely to leak from a slit portion when a treatment tool is inserted.

[0006]

In order to achieve the above object, a forceps plug for an endoscope according to the present invention is made of an elastic material which is detachably attached to an entrance of a treatment instrument insertion passage of the endoscope. Is formed in a lid body formed of a stopper body formed at an entrance portion of the treatment instrument insertion passage so as to be able to be inserted and detached from the cover body. In a forceps stopper of an endoscope in which a "-"-shaped slit which is expanded by a treatment tool inserted into and removed from a tool insertion passage is formed in a stopper portion, when the stopper portion is fitted into the stopper hole, the slit is formed. The plug is pressed into the plug receiving hole in a direction perpendicular to the longitudinal direction of the slit, and a gap is formed between the plug and the plug receiving hole in the longitudinal direction of the slit.

[0007] A circumferential groove may be formed on the outer peripheral surface of the outer wall of the plug receiving hole, and an engaging portion which is elastically detachable in the circumferential groove may be formed in the lid.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 7 shows an endoscope in which a base end of an insertion section 1 covered with a flexible tube is connected to a lower end of an operation section 2.

The distal end of the treatment instrument insertion passage 3 inserted and arranged in the insertion portion 1 is open to the outside at the tip of the insertion portion 1, and the forceps plug 10 arranged at the entrance of the treatment instrument insertion passage 3 is operated by the operating portion 2.
Projecting obliquely upward from the lower end portion of the.

FIG. 1 shows a forceps plug 10 removably attached to an inlet mouthpiece 30 provided at the inlet end of the treatment instrument insertion passage 3, and FIG. 2 shows a cross section taken along line II-II. 31
Is an O-ring for sealing.

The forceps stopper 10 includes a barrel-shaped member 11 and a lid-shaped member 12 each formed of an elastic rubber material.
The barrel-shaped member 11 and the lid-shaped member 12 are removably fitted into first and second circumferential grooves 32 and 33 formed on the outer peripheral surface of the inlet mouthpiece 30. Installed.

The barrel-shaped member 11 has an elastic projection 13 projecting from the inner peripheral surface thereof fitted in a first circumferential groove 32 formed near the mouth of the inlet base 30. Can be disengaged from the first circumferential groove 32 by elastically deforming it.

The barrel-shaped member 11 has a closing film 14 having a small hole 15 formed in the center at a position facing the opening end of the inlet mouthpiece 30. Is inserted into and removed from the treatment instrument insertion passageway 3 while pushing.

The lid member 12 is provided with a flexible connection band portion 22 on the annular portion 21 resiliently and removably attached to a second circumferential groove 33 formed at the base of the inlet mouthpiece 30. The body part 23 is connected and comprised.

At the center of the lid 23, a barrel-shaped member 11 is provided.
A plug portion 24 which can be inserted into and removed from the plug receiving hole 16 which is an inlet opening portion of the boss is protruded downward integrally with the lid portion 23.

Further, a circumferential groove 17 is formed on the outer peripheral surface of the plug receiving hole 16 of the cylindrical outer wall of the barrel-shaped member 11, and the engaging groove is elastically detachable with the circumferential groove 17. 29 is formed to protrude in an annular shape around the plug portion 24 from the lower surface side of the lid portion 23 toward the inside.

As shown in FIG. 1, when the engaging projection 29 is engaged with the circumferential groove 17, the lid 2
The third plug portion 24 fits into the plug receiving hole 16 of the barrel 11, and the lid 23 is attached to the entrance of the barrel 11. With such a configuration, when the distal end of the treatment tool 100 is inserted, the lid 23 does not shake, and the treatment tool 100 is inserted in a stable direction.

The engaging protrusion 29 is elastically deformed to form the circumferential groove 17.
3, the plug portion 24 comes out of the plug receiving hole 16 and the lid portion 23 comes off the barrel-shaped member 11, as shown in FIG.

The bottom of the plug 24 is a closing film 26, and a "-"-shaped slit 27 is formed in the center thereof. The slit 27 normally maintains a closed state due to its own elasticity, and is expanded by the treatment tool inserted into and removed from the treatment tool insertion passage 3.

In the portion where the plug portion 24 is fitted into the plug receiving hole 16, the plug portion 24 is formed to have a slightly larger size than the plug receiving hole 16 in a direction perpendicular to the longitudinal direction of the slit 27. Then, the plug portion 24 is pressed into the plug receiving hole 16. Therefore, the slit 27 always receives a force in the closing direction from the plug receiving hole 16 side of the barrel-shaped member 11.

On the other hand, in the longitudinal section of the slit 27, as shown in FIG. 2, the plug receiving hole 16 side is formed large, and there is a gap between the plug portion 24 and the plug receiving hole 16.
The plug portion 24 has the freedom to spread. The stopper hole 16 is
In this embodiment, as shown in the plan view of FIG. 4, it is formed in an elliptical shape.

FIG. 5 shows a state in which the treatment tool 100 is inserted into the forceps plug 10 of the embodiment configured as described above, and the slit 27 is elastically pushed out by the shaft of the treatment tool 100. From this state, the treatment tool 1
00 is pushed in, the small holes 1 on the barrel-shaped member 11 side
5 is also spread.

When the treatment tool 100 is inserted into the slit 27, the plug portion 24 can spread in the longitudinal direction of the slit 27, but almost completely in the direction perpendicular to the longitudinal direction of the slit 27. Can not.

Therefore, the entrance of the forceps plug 10 is
As shown in FIG. 6 which is a plan view seen from the axial direction of 00, when the central portion of the slit 27 is pushed open by the treatment tool 100, the plug portion 24 elastically deforms in the longitudinal direction of the slit 27 and spreads. At the same time, in a portion near the end of the slit 27 into which the treatment tool 100 is not inserted, the slit surfaces are pressed against each other as shown by the arrow, so that the state is strongly closed.

As a result, when the treatment tool 100 passes through the inside of the slit 27, the slit 27 is not opened at all or almost over the entire width, and no leakage of waste liquid or pressure from the treatment tool insertion passage 3 occurs.

The present invention is not limited to the above embodiment. For example, as shown in FIG.
Is not limited to an elliptical shape, and may be a shape in which a linear portion is provided on a circular side surface.

Further, as shown in FIG.
The fitting surface of the plug portion 24 and the plug receiving hole 16 in the direction perpendicular to the longitudinal direction of the plug 7 may be tapered.

[0028]

According to the present invention, when the plug portion is fitted in the plug receiving hole, the plug portion is pressed into the plug receiving hole in a direction perpendicular to the longitudinal direction of the slit, and the longitudinal direction of the slit is changed. In the configuration in which a gap is formed between the plug portion and the plug receiving hole, when the central portion of the slit is pushed open by the treatment tool, the plug portion is elastically deformed in the longitudinal direction of the slit and expands. In the part near the end of the slit where the treatment tool is not inserted, the slit surface is pressed tightly and closed strongly, so even if the treatment tool is inserted, there is no leakage from the slit part and excellent sealing performance Can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a forceps stopper of an endoscope according to a first embodiment of the present invention.

FIG. 2 is a view showing a forceps stopper of the endoscope according to the first embodiment of the present invention;
FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a longitudinal sectional view of the endoscope of the first embodiment of the present invention in a state in which a lid of a forceps stopper is removed from a stopper receiving hole.

FIG. 4 is a plan view of the endoscope according to the first embodiment of the present invention in a state where a lid of a forceps stopper is removed from a stopper receiving hole;

FIG. 5 is a longitudinal sectional view showing a state in which a treatment tool is inserted into a forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 6 is a plan view showing a state where a treatment tool is inserted into a forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 7 is a side view showing the entire configuration of the endoscope according to the first embodiment of the present invention.

FIG. 8 is a plan view showing a state in which a lid of a forceps stopper of an endoscope according to a second embodiment of the present invention is removed from a stopper receiving hole.

FIG. 9 is a plan view showing a state in which the lid of the forceps stopper of the endoscope according to the third embodiment of the present invention has been removed from the stopper receiving hole.

FIG. 10 is a plan view showing a state in which a treatment tool is inserted into a forceps stopper of a conventional endoscope.

[Explanation of symbols]

 Reference Signs List 3 treatment tool insertion passage 10 forceps plug 11 barrel-shaped member 12 lid-like member 16 plug receiving hole 23 lid body 24 plug portion 26 closing membrane 27 slit 100 treatment tool

Claims (2)

[Claims] 1. A lid made of a resilient material which is detachably attached to an entrance portion of a treatment instrument insertion passage of an endoscope,
A plug portion that can be fitted and detached from the plug receiving hole formed at the entrance portion of the treatment tool insertion passage is formed, and usually maintains a closed state by its own elasticity, and is inserted into the treatment tool insertion passage. "-" That is pushed out by the inserted and removed treatment tool
In a forceps stopper of an endoscope in which a slit having a shape of an endoscope is formed in the stopper, when the stopper is fitted in the stopper hole, the stopper in a direction perpendicular to a longitudinal direction of the slit. Is press-fitted into the plug receiving hole, and a gap is formed between the plug portion and the plug receiving hole in the longitudinal direction of the slit. 2. A cover according to claim 1, wherein a circumferential groove is formed on an outer peripheral surface of an outer wall of said stopper hole, and an engaging portion which is elastically detachable is formed in said circumferential groove. Endoscope forceps stopper.