JP3992820B2 - Endoscope forceps plug - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscopic forceps plug for preventing leakage from an insertion port of a treatment instrument insertion channel of an endoscope.
[0002]
[Prior art]
In general, a forceps plug of an endoscope is provided with a seal member made of a resilient member, and a closing portion made of a slit or the like formed in the seal member is pushed and spread by a treatment instrument inserted therethrough. It is supposed to be. The shape of the seal member is various.
[0003]
[Problems to be solved by the invention]
Endoscopic treatment tools inserted through forceps plugs include forceps, snares, syringes, baskets, contrast tubes, and many other types of tools, combined with a metal coil pipe used as a shaft. It is roughly divided into those using resin-made flexible tubes.
[0004]
Among them, the coil pipe is relatively strong, so there are few problems when inserting and removing it from the forceps plug, but the flexible tube is weak, so the resistance when passing through the slit of the forceps plug seal member It often happens that the hips break and become unusable. However, if a slit or the like is formed loosely, leakage will occur.
[0005]
Therefore, an object of the present invention is to provide a forceps plug for an endoscope that can be passed smoothly without causing a hip to be broken even if a treatment instrument having a weak shaft has a waist, and that does not cause leakage.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the forceps plug of the endoscope of the present invention is arranged at the entrance of the treatment instrument insertion channel of the endoscope, and is elastically pushed and spread from the inner diameter side by the inserted treatment instrument. An annular seal member made of a member, and a plug member that can be inserted into and removed from the inner diameter portion of the annular seal member and that expands the annular seal member from the inner diameter side at the time of insertion.
[0007]
The annular seal member may be an O-ring, and the outer peripheral surface may be pressed against the surrounding members by being expanded from the inner diameter side, and is detachable from the entrance portion of the treatment instrument insertion channel of the endoscope. The stopper case may be formed of an elastic member, and the annular seal member may be formed integrally with the stopper case.
[0008]
The annular seal member may be coated with a low frictional resistance film, and the annular seal member may be formed in a cross-sectional shape in which the inner diameter side portion is thin.
[0009]
Moreover, the string-like body for connecting the said plug member to the entrance vicinity of the said treatment tool penetration channel may be provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 7 shows a state where the treatment tool 10 is inserted into the treatment tool insertion channel 4 of the endoscope. The insertion portion 1 of the endoscope has a proximal end connected to the operation portion 2, and an insertion port portion of the treatment instrument insertion channel 4 is disposed in the operation portion 2, and a forceps plug 3 is attached thereto.
[0011]
In the sheath 11 of the treatment instrument 10 inserted through the treatment instrument insertion channel 4, the distal end portion 11a projects forward from the distal end of the insertion portion 1 of the endoscope. Reference numeral 12 denotes a hand operating unit connected to the proximal end of the sheath 11.
[0012]
FIG. 1 shows the forceps plug 3 portion. Reference numeral 31 denotes a treatment instrument insertion base which is connected to the treatment instrument insertion channel 4 and protrudes from the surface of the operation unit 2. In the circular seal material accommodation groove 32 formed in the mouth opening portion, the elasticity is provided. An annular seal member 33 made of, for example, silicon rubber, nitrile rubber or chloroprene rubber is loaded.
[0013]
The annular seal member 33 is an O-ring having a circular cross-sectional shape, and the outer diameter is slightly smaller than the inner diameter of the sealing material accommodation groove 32. The inner diameter is outside the sheath 11 of the treatment instrument 10 inserted therethrough. It is formed slightly smaller than the diameter dimension.
[0014]
The annular seal member 33 is lightly pressed by a metal pressing lid 34 that is screwed into the treatment instrument insertion base 31, and is fixed in the seal material accommodation groove 32. A hole having substantially the same size as the inner diameter of the treatment instrument insertion channel 4 having a diameter through which the treatment instrument 10 can be inserted is formed in the center portion of the presser lid 34.
[0015]
Reference numeral 35 denotes a lid member that covers the forceps plug 3 when the treatment instrument 10 is not passed through the forceps plug 3 and is formed of a rubber material or a plastic material. At the center of the lower surface of the lid member 35, a rod-shaped plug member 36 that is inserted into the inner diameter portion of the annular seal member 33 is projected.
[0016]
The outer diameter dimension of the plug member 36 is formed to be slightly larger than the inner diameter dimension of the annular seal member 33, and the tip side portion thereof is gradually tapered so as to be smoothly inserted into the inner diameter portion of the annular seal member 33. Is formed.
[0017]
In addition, an elongated string member 37 is integrally connected to the lid member 35, and the end of the string member 37 is fixed to the base of the treatment instrument insertion base 31. Therefore, the lid member 35 is held in the vicinity thereof even when it is detached from the annular seal member 33.
[0018]
FIG. 2 shows a state in which the sheath 11 of the treatment instrument 10 is inserted from the forceps plug 3 into the treatment instrument insertion channel 4, and the annular seal member 33 is pushed and spread from the inner diameter side by the sheath 11, Is pressed against the sealing material receiving groove 32 and is also pressed against the back surface of the pressing lid 34 and the bottom surface of the sealing material receiving groove 32, and the forceps plug 3 is completely sealed. Therefore, no pressure leaks from the treatment instrument insertion channel 4 even when the treatment instrument is used.
[0019]
However, since the annular seal member 33 is not expanded by the sheath 11 from the sealed state but only by an amount corresponding to the so-called O-ring tightening margin, the insertion resistance applied to the sheath 11 from the annular seal member 33 is small, and the sheath Even if 11 is a flexible tube or the like having a low waist, it can be inserted and removed without buckling.
[0020]
If the annular seal member 33 is coated with, for example, a tetrafluoroethylene resin film or the like, the frictional resistance against the sheath 11 is reduced, and the waist 11 can be more reliably prevented from breaking.
[0021]
FIG. 3 shows a state when the treatment instrument 10 is not used, and the plug member 36 is inserted into the inner diameter portion of the annular seal member 33. The insertion / removal operation is performed by holding the lid member 35 with a fingertip.
[0022]
The annular seal member 33 is expanded from the inner diameter side by the plug member 36, the outer peripheral surface is pressed against the inner peripheral surface of the seal material accommodation groove 32, and is also pressed against the back surface of the pressing lid 34 and the bottom surface of the seal material accommodation groove 32. Thus, the forceps plug 3 is completely sealed. Therefore, even when the treatment instrument 10 is not used, no pressure leakage from the treatment instrument insertion channel 4 occurs.
[0023]
FIG. 4 shows a forceps plug 3 according to a second embodiment of the present invention. A plug case 30 formed of a rubber material or a plastic material integrally with a lid member 35, a plug member 36, and a string member 37 is shown. The treatment instrument insertion base 31 formed in a so-called luer base shape is detachable.
[0024]
The stopper case 30 is attached in a state where the portion is tightened so that no pressure leaks from between the outer peripheral surface of the treatment instrument insertion base 31.
Moreover, in this embodiment, the cross-sectional shape of the annular seal member 33 is not circular, and the inner diameter side portion is formed to be gradually thinner in a tapered shape. Therefore, resistance to insertion / removal of the treatment instrument 10 is reduced, and buckling of the sheath 11 can be more reliably prevented.
[0025]
The present invention can take various other embodiments. For example, as shown in FIG. 5, the annular seal member 33 may be formed integrally with the plug case 30. In this case, the plug case 30 is formed of an elastic member.
[0026]
Further, as shown in FIG. 6, the cross-sectional shape of the annular seal member 33 may be formed in a shape in which a hook-shaped portion protrudes inward from a circular portion or other shapes.
[0027]
【The invention's effect】
According to the present invention, the elastic seal member into which the treatment instrument is inserted is formed in an annular shape, and the treatment instrument simply pushes the annular seal member from the inner diameter side so as to pass therethrough. Even if the treatment instrument has a weak shaft, it can be passed smoothly without breaking the waist, and pressure leakage from the treatment instrument insertion channel when using the treatment instrument can be completely prevented.
[0028]
When the treatment instrument is not used, pressure leakage from the treatment instrument insertion channel is completely prevented by inserting the plug member so as to push the annular seal member from the inner diameter side.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a forceps plug of an endoscope according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the endoscope forceps plug according to the first embodiment of the present invention when the treatment tool is used.
FIG. 3 is a longitudinal sectional view when the treatment instrument of the forceps plug of the endoscope according to the first embodiment of the present invention is not used.
FIG. 4 is a longitudinal sectional view of a forceps plug of an endoscope according to a second embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of a forceps plug of an endoscope according to a third embodiment of the present invention.
FIG. 6 is a longitudinal sectional view of another embodiment of the annular seal member of the present invention.
FIG. 7 is an external view of a state in which a treatment tool is set on an endoscope.
[Explanation of symbols]
3 Forceps plug 4 Treatment tool insertion channel 30 Plug case 31 Treatment tool insertion base 32 Seal material receiving groove 33 Annular seal member 35 Lid member 36 Plug member 37 String member

Claims (6)

An annular seal member that is arranged at the entrance of the treatment instrument insertion channel of the endoscope and is made of an elastic member that is pushed and expanded from the inner diameter side by the inserted treatment instrument;
A forceps plug for an endoscope, comprising: a plug member that can be inserted into and removed from an inner diameter portion of the annular seal member, and that pushes the annular seal member from the inner diameter side during insertion. The endoscopic forceps plug according to claim 1, wherein the annular seal member is an O-ring, and the outer peripheral surface is pressed against the surrounding members by being spread from the inner diameter side. 2. An inner portion according to claim 1, wherein a plug case detachably attached to an entrance portion of the treatment instrument insertion channel of the endoscope is formed of a resilient member, and the annular seal member is formed integrally with the plug case. Endoscopic forceps plug. 4. The endoscopic forceps plug according to claim 1, wherein the annular seal member is coated with a low frictional resistance film. The endoscopic forceps plug according to claim 1, 2, 3, or 4, wherein the annular seal member is formed in a cross-sectional shape in which a portion on an inner diameter side is thin. The forceps plug for an endoscope according to any one of claims 1 to 5, further comprising a string-like body for connecting the plug member near the entrance of the treatment instrument insertion channel.

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