JP2002028129A - Clamp plug of endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp plug of an endoscope, miniaturized, hardly becoming filthy, durable, and preventing the erroneous application in the reverse direction. SOLUTION: A circumferential groove 20 is formed on the outer surface of the barrel-shaped member 11. The shape of the section of the circumferential groove 20 is narrow and long in the direction parallel to the axial line of the barrel-shaped member 11. A ring-shaped part 23 is formed on the other end of a belt-like member 22 to be fit into the circumferential groove 20 detachably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forceps stopper of an endoscope which is disposed at an entrance of a treatment tool insertion channel of the endoscope.

[0002]

2. Description of the Related Art A forceps stopper of an endoscope plugs an entrance portion of a treatment tool insertion channel in a normal state so as to prevent in-vivo contaminants from spouting through the treatment tool insertion channel. When the treatment tool is inserted into and removed from the insertion channel, an operation for opening and closing the plug is not required, and further, the body waste must not be ejected when the treatment tool is inserted or removed.

[0003] Therefore, as shown in FIG. 9, for example, a forceps stopper of an endoscope is usually provided with a slit 9 for maintaining a closed state.
A first closing membrane 92 formed so that the first instrument 1 is elastically pushed open by the treatment tool passing therethrough, and a normally open small hole 93 elastically adheres to the outer surface of the treatment instrument passing therethrough. The second closing film 94 formed so as to be connected to the barrel-shaped member 95 made of a resilient material that can be detachably attached to the entrance portion 90 of the treatment instrument insertion channel of the endoscope, and the barrel-shaped member 95. On the other hand, it is arranged separately from a lid-like member 96 made of a resilient material that is detachable.

An annular portion 98 is formed at the other end of the belt-like member 97 extending from the lid-like member 96 so as not to be lost when the lid-like member 96 is removed from the barrel-like member 95. The annular portion 98 is configured to tighten the outer peripheral surface of the barrel-shaped member 95 (Japanese Patent Laid-Open No. 10-192230).
issue).

A circumferential groove is formed in the outer periphery of such a barrel-like member 95 so that the annular portion 9 formed in the belt-like member 97 is formed.
8 is engaged with the circumferential groove (Japanese Utility Model Laid-Open No. 54-150687).

[0006]

However, when the outer peripheral surface of the barrel-shaped member 95 is tightened with the annular portion 98 formed at the end of the belt-shaped member 97 as described above, the annular portion 98 may be removed. In addition to being difficult to remove, the annular portion 98 is always elastically stretched, so that the annular portion 98 is easily cracked, and the annular portion 98 is turned upside down with respect to the barrel member 95. There is a risk of incorrect mounting.

Further, in the case where the annular portion 98 is engaged with the circumferential groove formed on the outer peripheral surface of the barrel-shaped member 95, the outer diameter of the barrel-shaped member 95 must be increased by the amount of forming the circumferential groove. There are drawbacks such as the forceps stopper becoming large because it does not become dirty, and dirty liquid easily entering the circumferential groove and becoming dirty. In addition, there is a risk of incorrect mounting in the reverse direction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a forceps stopper for an endoscope which is not large, is not easily soiled, is durable, and is free from a risk of incorrect mounting in a reverse direction.

[0009]

In order to achieve the above-mentioned object, a forceps stopper of an endoscope of the present invention is provided with a slit which normally keeps a closed state elastically pushed and opened by a treatment tool passing therethrough. And a second closure membrane formed such that the normally open ostium resiliently adheres to the outer surface of the treatment tool passing therethrough. The barrel is divided into a barrel-shaped member made of a resilient material that is detachable at the entrance of the treatment instrument insertion channel of the mirror and a lid-shaped member made of a resilient material that is detachable from the barrel-shaped member. In a forceps stopper of an endoscope in which the other end of the band-shaped member extended and formed from the lid-shaped member is detachably provided with respect to the barrel-shaped member, the outer peripheral portion of the barrel-shaped member has a cross-sectional shape. An elongated circumferential groove is formed in the direction parallel to the axis of the barrel, and it can be engaged and disengaged from the circumferential groove. The annulus writing fits those formed on the other end of the belt-shaped member.

The annular portion formed on the other end of the belt-shaped member may be loosely engaged with the circumferential groove in the radial direction and tightly engaged in the width direction. An eaves covering the edge may be formed at the edge of the annular portion.

The cross-sectional shapes of the circumferential groove and the annular portion fitted into the circumferential groove may be formed asymmetrically in the width direction, and the barrel is closed when the annular portion is fitted into the circumferential groove. You may make it become the state raised from the surface of the shape member.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 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 channel 3 inserted through the insertion section 1 is open to the outside at the distal end of the insertion section 1, and the forceps plug 10 disposed at the entrance of the treatment instrument insertion channel 3 is operated by the operating section 2. Projecting obliquely upward from the lower end portion of the.

FIG. 1 shows a forceps stopper 10 removably attached to an inlet mouthpiece 30 provided at the entrance end of the treatment instrument insertion channel 3, and each of the forceps stoppers 10 is made of an elastic rubber. In the barrel-shaped member 11 formed of a material or the like,
The cover-like member 12 is detachably attached.

The barrel-shaped member 11 has an elastic projection 13 projecting from the inner peripheral surface thereof fitted into a circumferential groove 32 formed near the mouth of the inlet mouthpiece 30. The barrel-shaped member 11 can be attached to and detached from the inlet mouthpiece 30 by elastically deforming and engaging and disengaging the circumferential groove 32.

The barrel-shaped member 11 has a closing film 14 (second closing film) having a small hole 15 formed in the center at a position facing the opening end of the inlet mouthpiece 30. When the treatment tool inserted into and removed from the treatment tool insertion channel 3 passes therethrough,
The small hole 15 is elastically pushed and spread by the treatment tool, and closely adheres to the outer peripheral surface of the treatment tool, thereby sealing between the inside of the treatment tool insertion channel 3 and the outside.

The lid member 12 is removably fitted into the opening of the barrel member 11 from the outside, and a flange 24 projecting from the tip of the fitting portion of the lid member 12 is provided with a flange 24.
It is detachable from a circumferential groove 17 formed on the inner periphery of the opening.

If the flange 24 is engaged with the circumferential groove 17 by elastically deforming the lid member 12 side, the lid member 1
2 is locked in the opening of the barrel 11, and the lid 24 is removed from the opening of the barrel 11 by elastically deforming the flange 24 and removing it from the circumferential groove 17. it can.

The bottom portion of the lid member 12 is provided with a closing film 26 (first
), And a slit 27 is formed in the center thereof. The slit 27 normally keeps a closed state by its own elasticity to seal between the inside and outside of the treatment instrument insertion channel 3, and is elastically moved by the treatment instrument inserted into and removed from the treatment instrument insertion channel 3. It is pushed open.

As shown in the developed view of FIG. 3, a thin and elongated band-like member 22 is formed from the lid-like member 12.
The belt-shaped member 2
An annular portion 23 which is engaged with and disengaged from the barrel-shaped member 11 is integrally formed at the other end of the tube 2.

As shown in FIG. 1, a circumferential groove 20 with which the annular portion 23 engages is formed at an intermediate portion on the outer periphery of the barrel-shaped member 11. The circumferential groove 20 of this embodiment has a rectangular cross section that is elongated in a direction parallel to the axis of the barrel 11.

Since the annular portion 23 is shaped to fit into the circumferential groove 20, its sectional shape is the same as the sectional shape of the circumferential groove 20, and the outer surface of the annular portion 23 is the outer surface of the barrel 11. Is almost the same. However, the annular portion 23 is formed so as to be loosely fitted into the circumferential groove 20 so as not to be deformed in the radial direction, and to be tightly fitted while being elastically deformed in the width direction.

With such a structure, the annular portion 23 can be attached to and detached from the barrel-shaped member 11 by being elastically deformed and disengaged from the circumferential groove 20, so that the annular portion 23 can be used for cleaning and disinfection. By removing the annular portion 23 from the circumferential groove 20, the lid-like member 12 can be completely separated from the barrel-like member 11,
Normally, the annular portion 23 is engaged with the circumferential groove 20, so that even if the lid-shaped member 12 is removed from the barrel-shaped member 11, there is no risk of loss.

The circumferential groove 20 and the annular portion 23 of the forceps plug 10 thus configured have a cross-sectional shape elongated in a direction parallel to the axis of the barrel-shaped member 11, so that the depth of the circumferential groove 20 is increased. Therefore, the cross-sectional area of the annular portion 23 can be sufficiently ensured, so that the barrel-shaped member 11 does not become large and the forceps plug 10 does not become large.

Further, since the annular portion 23 is loosely fitted into the circumferential groove 20 so as not to be deformed in the radial direction, the annular portion 23 does not become stretched, and even after a long period of time, the annular portion 23 is not extended. No cracks or the like occur in 23.

Since the annular portion 23 is tightly fitted into the circumferential groove 20 while being elastically deformed in the width direction, it is difficult for dirt or the like to enter the circumferential groove 20 from the outside, and it is sanitary. is there.

FIG. 4 shows a forceps plug 1 according to a second embodiment of the present invention.
0, the bottom surface of each of the circumferential groove 20 and the annular portion 23 is formed in a tapered shape whose diameter gradually changes in the axial direction.

FIG. 5 shows a forceps plug 10 according to a third embodiment of the present invention, in which a step is formed on the bottom surface of the circumferential groove 20 and the annular portion 23. All other configurations are the same as in the first embodiment.

As described above, by forming the cross-sectional shapes of the circumferential groove 20 and the annular portion 23 to be asymmetrical in the width direction, the annular portion 23 cannot be attached to the circumferential groove 20 in the wrong vertical direction. In addition, erroneous mounting can be prevented.

FIG. 6 shows a forceps stopper 1 according to a fourth embodiment of the present invention.
0 is shown, and an eave portion 23 a is formed on the outer surface side of the edge of the annular portion 23 so as to cover the edge of the circumferential groove 20 over the entire length. By doing so, the circumferential groove 2
Even if the annular portion 23 is loosely fitted in the width direction with respect to 0, the infiltration of the waste liquid into the circumferential groove 20 can be prevented.

FIG. 7 shows a forceps plug 1 according to a fifth embodiment of the present invention.
0 is shown, and the wall surface in the width direction of the circumferential groove 20 and the annular portion 23 is formed in a tapered shape gradually expanding toward the outer surface side. Also in this case, the infiltration of the waste liquid into the circumferential groove 20 can be reduced.

FIG. 8 shows a forceps plug 1 according to a sixth embodiment of the present invention.
0 is shown, and the annular portion 23 is configured to be raised from the surface of the barrel-shaped member 11 when fitted in the circumferential groove 20. This makes it easier to remove the annular portion 23 with a fingertip.

[0033]

According to the present invention, on the outer peripheral portion of the barrel-shaped member,
The cross-sectional shape forms an elongated circumferential groove in a direction parallel to the axis of the barrel-shaped member, and an annular portion that is removably fitted into the circumferential groove is formed on the other end side of the band-shaped member, so that the circumferential groove is formed. Since the sectional area of the annular portion can be sufficiently ensured without increasing the depth of the barrel, the barrel-shaped member does not become large and the forceps plug does not become large.

Since the annular portion is loosely engaged with the circumferential groove in the radial direction, the annular portion is not always in a stretched state. .

Further, the annular portion is tightly engaged with the circumferential groove in the width direction, or an eave portion covering the edge of the circumferential groove is formed at the edge of the annular portion, so that the annular groove is inserted into the circumferential groove. It is sanitary by preventing infiltration of waste liquid and the like.

Also, by forming the cross-sectional shapes of the circumferential groove and the annular portion asymmetrically in the width direction, incorrect mounting in the reverse direction can be eliminated.

[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 side view showing the overall configuration of the endoscope according to the first embodiment of the present invention.

FIG. 3 is a development view of a lid-like member, a band-like member, and an annular portion of the forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a forceps stopper of an endoscope according to a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a forceps stopper of an endoscope according to a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a forceps stopper of an endoscope according to a fourth embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a forceps stopper of an endoscope according to a fifth embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a forceps stopper of an endoscope according to a sixth embodiment of the present invention.

FIG. 9 is a longitudinal sectional view of a forceps stopper of a conventional endoscope.

[Explanation of symbols]

 Reference Signs List 3 treatment instrument insertion channel 10 forceps plug 11 barrel member 12 lid member 14 closing film (second closing film) 20 circumferential groove 22 band member 23 annular portion 23a eaves portion 26 closing film (first closing film) 27 Slit 30 entrance mouthpiece

Claims (5)

[Claims] A first closing membrane formed so that a slit, which normally keeps a closed state, is elastically pushed open by a treatment tool passing therethrough, and a normally open small hole is formed therein. A second closing film formed so as to elastically adhere to the outer surface of the treatment instrument passing therethrough, and a barrel member made of a resilient material detachable from an entrance portion of the treatment instrument insertion channel of the endoscope; And a lid member made of a resilient material that is detachable from the barrel member. The other end of the band member extending from the lid member is connected to the barrel member. In a forceps stopper of an endoscope detachably provided to a member, a circumferential groove having a cross-sectional shape formed in an outer peripheral portion of the barrel-shaped member in a direction parallel to an axis of the barrel-shaped member is formed. An annular portion is formed at the other end of the belt-like member so as to be detachably fitted into the circumferential groove. And a forceps stopper for an endoscope. 2. The endoscope according to claim 1, wherein an annular portion formed at the other end of the band-shaped member is loosely engaged with the circumferential groove in the radial direction and tightly engaged in the width direction. Forceps stopper. 3. A forceps stopper for an endoscope according to claim 1, wherein an eave portion covering an edge of said circumferential groove is formed at an edge of said annular portion. 4. A forceps stopper for an endoscope according to claim 1, wherein a cross-sectional shape of each of said circumferential groove and said annular portion fitted into said circumferential groove is asymmetric in a width direction. 5. A forceps for an endoscope according to claim 1, wherein said annular portion rises from the surface of said barrel when said annular portion is fitted in said circumferential groove. plug.