JP2002204779A - Endoscope forceps stopper - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a good sealing property in both a normal state and when a treatment tool passes, and to smoothly pass the treatment tool without breaking the waist, because the treatment tool passes smoothly. To provide a forceps stopper for an endoscope that can perform the operation. SOLUTION: A tubular member 13 made of a material having flexibility and a smaller coefficient of friction than a closing film 11 is inserted through a slit 12 and both ends of the tubular member 13 are respectively opened on both front and back sides of the closing film 11. The intermediate portion sandwiched between the slits 12 is crushed and closed, and the treatment tool 100 is inserted into the cylindrical member 13 so that the intermediate portion of the cylindrical member 13 is pushed open together with the slit 12. I made it.

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 for an endoscope seals an entrance portion of a treatment tool insertion channel so that contaminants and the like in the body are not spouted in a normal state where the treatment tool is not used, and a treatment tool is inserted into the treatment tool insertion channel. At the time of insertion / removal, an operation for opening / closing the entrance is not required, and it is necessary to seal the inside of the treatment tool so as to prevent in-vivo contaminants and the like from being ejected.

Therefore, in general, a forceps stopper of an endoscope is provided with a closing film made of a resilient material arranged so as to close an entrance portion of a treatment instrument insertion channel of the endoscope. It is configured such that a slit which is kept open and elastically pushed open by the treatment instrument passing therethrough is formed.

[0004]

However, in order to have the above-mentioned characteristics, the closing film must be formed of a material having a considerably high elasticity. As a result, the surface of the slit has a large friction coefficient. It was one of the causes of breakage due to breakage of the waist when the treatment tool was pushed in while pushing and expanding the slit.

Accordingly, the present invention has a good sealing property in both the normal state and when the treatment tool passes, and has a good sliding property with respect to the passing treatment tool, so that the treatment tool can be passed smoothly without bending. An object of the present invention is to provide a forceps stopper for an endoscope.

[0006]

In order to achieve the above-mentioned object, a forceps stopper for an endoscope according to the present invention has an elasticity which is disposed so as to close an entrance portion of a treatment instrument insertion channel of the endoscope. In a forceps stopper for an endoscope in which a slit is formed in a closing film made of a material, a flexible tubular member made of a material having a smaller coefficient of friction than the closing film is inserted through the slit, and both ends of the tubular member are arranged. Are opened on both the front and back sides of the closing membrane, and the intermediate portion sandwiched between the slits is crushed and closed, and the treatment tool is inserted into the cylindrical member, whereby the intermediate portion of the cylindrical member is slit. It is made to be pushed open with.

A cut is formed in the middle part of the tubular member in a direction parallel to the axis, and when the tubular member is sandwiched between the slits and is crushed by the slit, the peripheral portion is folded. The adhesion of the part is improved.

When the tubular member is made of a flexible foamed fluororesin, the sealing performance is improved as a whole.

[0009]

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 2 covered with a flexible tube is connected to a lower end of an operation section 1.

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

FIG. 1 shows a forceps stopper 10. The forceps stopper 10 is formed in a stopper shape with an elastic rubber material or the like, and is attached to a mounting base 30 provided at an entrance portion of the treatment instrument insertion channel 3. It is attached detachably.

Inside the forceps plug 10, a closing film 11 for closing the opening between the entrance portion of the treatment instrument insertion channel 3 and the outside is integrally formed. The closing film 11 has a negative slit 12 therein. For example, it is formed in a cut shape by a razor or the like.

A cylindrical member 13 made of a material having flexibility and a smaller coefficient of friction than the closing film 11 is inserted and arranged in a state of being oriented in the insertion / removal direction of the treatment tool and perpendicular to the slit 12. Have been.

Examples of the material for forming the cylindrical member 13 include polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), ethylene tetrafluoride-propylene hexafluoride copolymer (FEP), A fluororesin such as ethylene-tetrafluoroethylene copolymer (ETFE) or ethylene-tetrafluoroethylene-perfluoroalkylvinyl ether copolymer (PFA), or polyethylene (PE) can be used. The coefficient of friction is several tenths of that of PTFE and one of several other materials compared to rubber.

The material of the cylindrical member 13 may be a simple cylindrical shape as shown in FIG. 3 or a cylindrical shape with a slightly narrowed intermediate portion as shown in FIG. When the intermediate portion is sandwiched by the slit 12, the cylindrical portion 13 is crushed and closed as shown in FIG. 5, and both ends of the cylindrical member 13 are kept in a circular shape as a raw material.

[0016] The forceps stopper of the endoscope thus configured is
Normally, as shown in FIG. 6 showing a VI-VI cross section in FIG. 1, an intermediate portion of the cylindrical member 13 crushed by being slit by the slit 12 is pressed by the elasticity of the closing film 11 to be in a closed state. No leakage of body waste occurs.

In order to obtain such a good sealed state, it is preferable to use a flexible foamed fluororesin (for example, trade name “Gore-Tex”). A gap is formed on the outer surface side of the cylindrical member 13. It is preferable to set the length of the slit 12 so as not to occur.

Then, as shown in FIG.
When the treatment tool 100 is passed through 3, the intermediate portion of the tubular member 13 is pushed open together with the slit 12 by the treatment tool 100, and the treatment tool 100 passes through the forceps plug 10.

Then, as shown in FIG. 8 showing a cross section taken along the line VIII-VIII in that state, the gap formed between the outer peripheral surface of the treatment tool 100 and the inner surface of the tubular member 13 is extremely small, and thus, the The leakage of the liquid hardly occurs, and the treatment tool 1
When 00 is pulled out, the state returns to the original state in which the tubular member 13 is closed again.

In this manner, the treatment tool 100 is
In the operation of inserting and removing the treatment tool 100, since the material having a smaller coefficient of friction than the closing film 11 is used as the cylindrical member 13 as described above, the sliding with respect to the passing treatment tool 100 is good,
The treatment tool 100 can be passed smoothly without breaking the waist.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG.
May be formed in the middle part of the body in a direction parallel to the axis. In this embodiment, the pair of cuts 14 is 180
° formed at symmetrical positions.

Then, as shown in FIG. 10, which is a plan sectional view of the slit 12, the tubular member 13 is arranged so as to be folded back at the cut 14 when the tubular member 13 is sandwiched between the slits 12 and crushed. As a result, the cylindrical member 13
As shown in FIG. 11, which is a single figure, the end of the cylindrical member 13 is sharply bent and the adhesion of the peripheral portion is improved.

[0023]

According to the present invention, the cylindrical member made of a material having flexibility and a smaller coefficient of friction than that of the closing film is inserted through the slit formed in the closing film, so that the normal state and the treatment tool can be improved. In any case of passing, the treatment device has good sealing properties, and has good slippage with respect to the passing treatment tool, so that the treatment tool can be passed smoothly without breaking the waist.

[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 an external view of an endoscope according to an embodiment of the present invention.

FIG. 3 is a perspective view of a single material of a tubular member of the forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 4 is a perspective view of a single body of another example of the material of the tubular member of the forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 5 is a perspective view of a single cylindrical member of the forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 6 is a plan sectional view (a sectional view taken along line VI-VI in FIG. 1) of a slit portion of the forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 7 is a longitudinal sectional view showing a state in which a treatment tool is passed through a forceps stopper of the endoscope according to the first embodiment of the present invention.

FIG. 8 is a view showing a forceps stopper of the endoscope according to the first embodiment of the present invention;
FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a perspective view of a single material of a tubular member of a forceps stopper of an endoscope according to a second embodiment of the present invention.

FIG. 10 is a plan sectional view of a slit portion of a forceps stopper of an endoscope according to a second embodiment of the present invention.

FIG. 11 is a perspective view of a single cylindrical member of a forceps stopper of an endoscope according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 3 treatment tool insertion channel 10 forceps plug 11 closing membrane 12 slit 13 tubular member 14 cut 100 treatment tool

Continued on the front page (72) Inventor Satoshi Kidooka 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Gaku Kogyo Co., Ltd. F-term (reference) 4C061 HH23

Claims (3)

[Claims] 1. A forceps stopper for an endoscope, wherein a slit is formed in a closing membrane made of an elastic material which is disposed so as to close an entrance portion of a treatment instrument insertion channel of the endoscope. A cylindrical member made of a material having a smaller coefficient of friction than the closing film is inserted through the slit, and both ends of the cylindrical member are respectively opened on both front and back sides of the closing film, and an intermediate portion sandwiched between the slits. The endoscope is crushed and closed, and the treatment tool is inserted into the tubular member so that an intermediate portion of the tubular member is pushed open together with the slit. Forceps stopper. 2. A cut is formed in a middle portion of the tubular member in a direction parallel to an axis, and the tubular member is folded at the cut when the tubular member is sandwiched between the slits and crushed. Item 4. A forceps stopper for an endoscope according to Item 1. 3. The endoscope forceps stopper according to claim 1, wherein said tubular member is formed of a flexible foamed fluororesin.