JP2006296609A - Forceps plug of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forceps plug of an endoscope, capable of smoothly performing the motion of pushing open and moving an inward projection formed in a lid body to be engaged with a circular groove formed on a forceps plug body without being blocked, and surely attaching the lid body to the forceps plug body. <P>SOLUTION: The circular groove 21 is formed on the outer peripheral surface 24 of the forceps plug body 11, and the inward projection 23 detachable from the circular groove 21 is formed to project at the distal end of an annular wall 22 projecting from the lid body 12 side in such a way as to surround a part near a projection end entrance 15 of the forceps plug body 11. The inward projection 23 of the lid body 12 is elastically deformed as pushed open along the outer peripheral surface 24 of the forceps plug body 11 to be engaged/disengaged with the circular groove 21. The part close to the projection end entrance 15 from the circular groove 21 on the outer peripheral surface 24 of the forceps plug body 11 is tapered so that the diameter becomes gradually smaller toward the projection end entrance 15 side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an endoscopic forceps plug.

  As shown in FIG. 5, for example, a forceps plug of an endoscope generally has a cylindrical forceps plug main body 91 whose base is detachably attached to an inlet base 4 of a treatment instrument insertion channel 3 of the endoscope, and its forceps. A lid 92 that is detachably attached to the protrusion inlet portion of the plug body 91 is formed of a resilient member, and the closing films 93 and 94 that are pushed open by the treatment instrument inserted into the treatment instrument insertion channel 3 are formed. The forceps plug main body 91 and the lid 92 are provided.

In order to engage and disengage the lid 92 with the forceps plug main body 91, a circumferential groove 95 is formed on the outer peripheral surface of the forceps plug main body 91 so as to surround the periphery of the portion of the forceps plug main body 91 near the protruding end entrance. An inward projection 97 that can be engaged with and disengaged from the circumferential groove 95 is formed at the tip of an annular wall 96 projecting from the lid 92 side.
(For example, patent document 1).
JP2005-80867

  In the forceps plug of the endoscope as described above, when the lid 92 is attached to the forceps plug main body 91, the lid 92 is removed from the forceps plug main body 91 from the state shown in FIG. As shown in the figure, the inward projection 97 of the lid 92 is elastically deformed in a state of being pushed and expanded along the outer peripheral surface 98 of the forceps plug main body 91 and is moved to the circumferential groove 95 side. The groove 95 is engaged / disengaged.

  However, in the forceps plug of the conventional endoscope, when the inward protrusion 97 of the lid 92 is pushed along the outer peripheral surface 98 of the forceps plug main body 91, the inner protrusion 97 and the outer peripheral surface of the forceps plug main body 91 are expanded. A very large frictional resistance is generated between

  Therefore, as shown in FIG. 8, the inward projection 97 is hooked on the outer peripheral surface 98 of the forceps plug main body 91, and the annular wall 96 remains elastically deformed. 95, the internal sewage or the like may be ejected from inside the treatment instrument insertion channel 3 using the endoscope in this state, and the surroundings may be contaminated.

  Therefore, the present invention smoothly moves the inner protrusion formed on the lid body so that the inward projection is moved to engage with the circumferential groove formed on the forceps plug body without being caught. It is an object of the present invention to provide an endoscopic forceps plug that can be securely attached to a forceps plug body.

  In order to achieve the above object, the forceps plug of the endoscope according to the present invention includes a cylindrical forceps plug body whose base portion is detachably attached to the entrance portion of the treatment instrument insertion channel of the endoscope, and a protruding end of the forceps plug body. A lid that is detachably attached to the inlet portion is formed of an elastic member, and a closure membrane that is pushed open by a treatment instrument inserted into the treatment instrument insertion channel is provided on the forceps plug body and the lid. An endoscopic forceps plug having a circumferential groove formed on the outer peripheral surface of the forceps plug main body and projecting from the lid side so as to surround the periphery of the forceps plug main body near the protrusion entrance An inward projection that can be engaged with and disengaged from the circumferential groove is formed at the tip of the wall, and the inner projection of the lid is elastically deformed so that it is spread along the outer peripheral surface of the forceps plug body. In the forceps plug of an endoscope in which the inner protrusion is engaged with and disengaged from the circumferential groove The portion of the tip inlet portion closer than a circumferential groove of the outer peripheral surface of the forceps plug body, and is formed in a tapered shape that gradually diameter to tip inlet side becomes narrower.

  In addition, the inner peripheral surface of the annular wall of the lid may be formed in a taper shape along the portion closer to the protrusion entrance than the circumferential groove on the outer peripheral surface of the forceps plug body, and the inward projection of the lid is annular It may be formed so as to protrude inward from the tip of the wall over the entire circumference.

  According to the present invention, the portion closer to the tip inlet portion than the circumferential groove on the outer peripheral surface of the forceps plug main body is formed in the lid by being formed in a tapered shape whose diameter gradually decreases toward the tip inlet portion. The operation of expanding and moving the inward protrusion to engage the circumferential groove formed in the forceps plug body is smoothly performed without being caught, and the lid body can be securely attached to the forceps plug body.

  A cylindrical forceps plug body whose base is detachably attached to the entrance portion of the treatment instrument insertion channel of the endoscope and a lid body detachably attached to the protrusion entrance portion of the forceps plug body are both elastic members. The closure film formed and pushed open by the treatment instrument inserted into the treatment instrument insertion channel is an endoscopic forceps plug provided on the forceps plug body and the lid, and is formed on the outer circumferential surface of the forceps plug body. An inward projection that can be engaged and disengaged with respect to the circumferential groove at the distal end portion of the annular wall that is formed from the lid side so as to surround the periphery of the portion near the protruding end entrance portion of the forceps plug body. Endoscopic forceps in which the inner protrusion is elastically deformed in a state where the inner protrusion of the lid is pushed and spread along the outer peripheral surface of the forceps plug body, and the inner protrusion is engaged with and disengaged from the circumferential groove. In the stopper, the portion closer to the tip entrance than the circumferential groove on the outer peripheral surface of the forceps stopper body It is formed in a tapered shape that gradually diameter to tip inlet side becomes narrower.

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 1 denotes an insertion portion of the endoscope, and 2 denotes an operation portion connected to the proximal end of the insertion portion 1.

  A treatment instrument insertion channel 3 for inserting a treatment instrument (not shown) is inserted through the entire length of the insertion section 1, and the entrance opening of the treatment instrument insertion channel 3 disposed at the lower end of the operation section 2. A forceps plug 10 is detachably attached to the part so as to prevent body sewage or the like flowing backward through the treatment instrument insertion channel 3 from blowing out.

  As shown in FIG. 1 showing an enlarged cross section of the forceps plug 10, the forceps plug main body 11 formed in a cylindrical shape to be attached to the inlet base 4 of the treatment instrument insertion channel 3 and the protruding end of the forceps plug main body 11. The inlet portion 15 has a detachable lid 12 and the whole is made of an elastic rubber material or the like.

  A portion of the inner surface of the forceps plug main body 11 near the proximal end is formed with a small diameter portion 13 that can be engaged with and disengaged from the inlet base 4 of the treatment instrument insertion channel 3. The base 4 can be attached and removed in a tightened state. In FIG. 1, the non-elastically deformed shape of the small-diameter portion 13 is shown overlapping the inlet base 4.

  The lid body 12 is connected to the base of the forceps plug body 11 by a connecting string-like member 14 formed integrally with the lid body 12 by an elastic rubber material. It is supposed to be in a state of being hung by.

  Closure films 16 and 17 are formed in the forceps plug main body 11 and the lid body 12, respectively, and the closure film 16 in the forceps plug main body 11 is pushed open by the treatment tool inserted into the treatment tool insertion channel 3. A small hole 18 is formed, and a slit 19 that is pushed open by a treatment instrument inserted into the treatment instrument insertion channel 3 is formed in the closing film 17 of the lid body 12.

  Therefore, in the state shown in FIG. 1 in which the lid 12 is attached to the forceps plug body 11 and the treatment instrument is not used, internal body sewage or the like is ejected from the treatment instrument insertion channel 3 by the slit 19 formed in the lid 12. Not sealed.

  When a treatment tool (not shown) is inserted into and removed from the treatment tool insertion channel 3, the space between the small hole 18 and the outer peripheral surface of the treatment tool is sealed by the slit 19, and the treatment tool insertion channel 3 is filled with a syringe. In the case of feeding a chemical solution or the like, the lid 12 can be removed to make the small hole 18 a chemical solution passage.

  In the forceps plug 10 configured as described above, a circumferential groove 21 is formed on the outer peripheral surface 24 of the forceps plug main body 11 near the protruding end inlet portion 15 over the entire circumference, and the protruding end inlet portion 15 of the forceps plug main body 11 is formed. An annular wall 22 is formed so as to protrude from the lid 12 side so as to surround the periphery of the close portion.

  An inward projection 23 that can be engaged with the circumferential groove 21 over the entire circumference is formed so as to project inward from the entire circumference of the inner peripheral portion of the distal end portion of the annular wall 22. It can be elastically deformed in a state of being expanded along the outer peripheral surface 24 of the main body 11 and can be engaged with and disengaged from the circumferential groove 21.

  The portion of the outer peripheral surface 24 of the forceps plug main body 11 that is closer to the protrusion inlet 15 than the circular protrusion 21 contacts with the inner protrusion 23 when the inner protrusion 23 is engaged with the peripheral groove 21 is the protrusion inlet. It is formed in a tapered shape that gradually decreases in diameter toward the 15 side.

  Further, when the lid 12 is attached to the forceps plug main body 11, the inner surface of the annular wall 22 of the lid 12 facing the portion closer to the projecting inlet 15 than the circumferential groove 21 of the outer circumferential surface 24 of the forceps plug main body 11. The peripheral surface is formed in a tapered shape along the outer peripheral surface 24 of the forceps plug body 11.

  With such a configuration, when the lid body 12 is attached to the forceps plug main body 11 from the state shown in FIG. 3 in which the lid body 12 is removed from the forceps plug main body 11, as shown in FIG. The inward protrusion 23 of the body 12 is elastically deformed in a state where the inner protrusion 23 of the forceps plug body 11 is pushed and spread out, but the outer peripheral surface 24 of the forceps plug body 11 is formed in a tapered shape at that portion. Therefore, the amount of elastic deformation of the inward projection 23 is smaller than in the conventional case, and therefore the frictional resistance when the inward projection 23 slides with respect to the outer peripheral surface 24 of the forceps plug body 11 is small.

  Therefore, the inner projection 23 moves smoothly to the vicinity of the circumferential groove 21 without being caught in the middle, and finally the outer circumferential surface 24 of the forceps plug body 11 immediately before the inner projection 23 is engaged with the circumferential groove 21. Although the frictional resistance of the same level as that of the prior art is generated because the outer diameter of the inner protrusion 23 is large, the inner protrusion 23 reaches the edge of the circumferential groove 21 only at the last moment. As shown, the inner protrusion 23 is fitted in the circumferential groove 21 by its own elasticity.

  When the inner protrusion 23 is engaged with the circumferential groove 21 in this way, the inner peripheral surface of the annular wall 22 of the lid 12 is in close contact with the outer peripheral surface 24 of the forceps plug body 11, and Since the closing membrane 17 portion is in close contact with the inner peripheral surface of the tip end inlet portion 15 of the forceps plug main body 11, the lid 12 is attached to the tip end inlet portion 15 of the forceps plug main body 11 in a leak-free state.

It is side surface sectional drawing of the forceps stopper of the endoscope of the Example of this invention. 1 is a side view showing an overall configuration of an endoscope according to an embodiment of the present invention. It is side surface sectional drawing of an operation | movement at the time of attaching the lid body of the forceps plug of the endoscope of the Example of this invention to a forceps plug main body. It is side surface sectional drawing of an operation | movement at the time of attaching the lid body of the forceps plug of the endoscope of the Example of this invention to a forceps plug main body. It is side surface sectional drawing of the forceps stopper of the conventional endoscope. It is side surface sectional drawing of an operation | movement at the time of attaching the lid body of the forceps plug of the conventional endoscope to the forceps plug main body. It is side surface sectional drawing of an operation | movement at the time of attaching the lid body of the forceps plug of the conventional endoscope to the forceps plug main body. It is side surface sectional drawing of an operation | movement at the time of attaching the lid body of the forceps plug of the conventional endoscope to the forceps plug main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Treatment tool insertion channel 4 Inlet mouthpiece 10 Forceps stopper 11 Forceps stopper main body 12 Lid body 15 Protrusion inlet part 16 Closure film 17 Closure film 21 Circumferential groove 22 Annular wall 23 Inward protrusion 24 Outer peripheral surface

Claims (3)

A cylindrical forceps plug main body whose base is detachably attached to the entrance portion of the treatment instrument insertion channel of the endoscope, and a lid that is detachably attached to the protruding end entrance of the forceps plug main body are both elastic members An endoscopic forceps plug provided on the forceps plug body and the lid body is formed by the closing film pushed open by the treatment tool inserted into the treatment tool insertion channel,
A circular groove is formed in the outer peripheral surface of the forceps plug body, and the circular wall is formed at the distal end portion of the annular wall projecting from the lid body so as to surround the periphery of the forceps plug body. An inward projection that can be freely engaged with and disengaged from the circumferential groove is formed, and the inward projection of the lid body is elastically deformed in a state of being pushed and extended along the outer peripheral surface of the forceps plug body, thereby In the forceps plug of the endoscope that is engaged with and disengaged from the circumferential groove,
A forceps plug for an endoscope, wherein a portion of the outer peripheral surface of the forceps plug main body, which is closer to the protruding end inlet portion than the circumferential groove, is formed in a tapered shape whose diameter gradually decreases toward the protruding end inlet portion.   The endoscope according to claim 1, wherein an inner peripheral surface of the annular wall of the lid body is formed in a taper shape along a portion closer to the protrusion entrance portion than the circumferential groove of the outer peripheral surface of the forceps plug body. Forceps stopper.   The forceps plug for an endoscope according to claim 1 or 2, wherein an inward projection of the lid is formed to project inward from the tip of the annular wall over the entire circumference.

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