JP4953772B2 - Endoscope forceps plug - Google Patents

Description

  The present invention relates to an endoscopic forceps plug for elastically sealing an entrance portion of a treatment instrument insertion channel so that in-vivo sewage or the like does not jet out of the endoscope through the treatment instrument insertion channel.

  As shown in FIG. 9, for example, a forceps plug of an endoscope generally has a cylindrical forceps plug main body 91 whose base is attached to an inlet base (not shown) of a treatment instrument insertion channel of the endoscope, and its forceps. A slit 92 or a small hole 94 that is formed by an elastic member together with a lid 92 that is detachably attached to the protrusion inlet portion of the plug main body 91 and is pushed open by the treatment instrument inserted into the treatment instrument insertion channel. The formed closure films 95 and 96 are provided on the lid 92 and the forceps plug body 91.

In order to lock the lid 92 to the forceps plug main body 91, a circumferential groove 99 is formed in the outer peripheral portion of the forceps plug main body 91 so as to project from the lid 92 side so as to surround the forceps plug main body 91. An annular inward protrusion 98 that can be engaged with and disengaged from the circumferential groove 99 is formed on the inner peripheral portion of the tip of the annular wall 97 provided so as to protrude all around (for example, Patent Document 1).
JP 2001-218732 A

  In the endoscope forceps plug as described above, when the lid 92 removed from the forceps plug body 91 as shown in FIG. 10 is attached to the forceps plug body 91, as shown in FIG. Then, the inner protrusion 98 portion of the lid 92 is slid toward the circumferential groove 99 in a state along the outer periphery of the forceps plug main body 91.

  However, as shown in FIG. 12, when the lid 92 is further slid so as to cover the forceps plug body 91, the forceps plug is moved before the inward projection 98 is engaged with the circumferential groove 99. The body 91 is elastically deformed in a state where the inner protrusion 98 is pushed and widened at a portion having a large outer diameter, and then the space A surrounded by the outer peripheral portion of the forceps plug body 91 and the annular wall 97 of the lid 92 is compressed. It will be in the state.

  Therefore, as shown in FIG. 13, before the inward projection 98 engages with the circumferential groove 99, the annular wall 97 bulges outward due to the pressure in the inner space A, and the lid body 92 is removed. In some cases, the inner protrusion 98 does not engage with the circumferential groove 99 even when pressed to the forceps plug main body 91 from above.

  When the forceps plug is used in a state in which the inward projection 98 does not engage with the circumferential groove 99, the forceps plug is blown off by a water hammer action or the like of body sewage entering the treatment instrument insertion channel from the body. As a result, the sewage may scatter around.

  An object of the present invention is to provide an endoscopic forceps plug in which a lid can be smoothly and surely attached to a forceps plug main body by a normal attaching operation, and there is no possibility of occurrence of in-situ effluent ejection. And

  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 is attached to the entrance portion of the treatment instrument insertion channel of the endoscope, and a protruding end inlet portion of the forceps plug body The lid body, which is detachably attached to the body, is formed of an elastic member, and a closure film that is pushed open by the treatment instrument inserted into the treatment instrument insertion channel is provided on the forceps plug body and the lid body. A forceps plug of an endoscope, wherein a circumferential groove is formed on the outer periphery of the forceps plug body, and the circumferential groove is formed at the distal end portion of the annular wall projecting from the lid body so as to surround the forceps plug body. A ring-shaped inward projection that can be freely engaged and disengaged is formed, and the inward projection portion of the lid slides in a state of being elastically deformed and pushed along the outer periphery of the forceps plug body, and then the circumference. In an endoscope forceps plug configured to engage with a groove, the inner side of the lid When the starting portion is elastically deformed and slides along the outer periphery of the forceps plug body, the space surrounded by the outer periphery of the forceps plug body and the annular wall of the lid is connected to the outside to communicate the air in the space. Is formed on the outer periphery of the forceps plug body.

  In addition, the ventilation groove may be formed in a state of communicating with the circumferential groove, or the ventilation groove may be formed on the outer peripheral portion of the forceps plug main body, one or a plurality at intervals in the circumferential direction. Good.

  According to the present invention, when the inward protruding portion of the lid is elastically deformed and slides along the outer periphery of the forceps plug body, the space surrounded by the outer periphery of the forceps plug body and the annular wall of the lid By attaching a vent groove on the outer periphery of the forceps plug body to allow the air in the space to be discharged to the outside by communicating with the outside, the lid body can be attached to the forceps plug body smoothly and reliably by a normal mounting operation. It is possible to eliminate the risk of occurrence of effluent in the body.

  A cylindrical forceps plug main body whose base is attached to the entrance portion of the treatment instrument insertion channel of the endoscope and a lid body detachably attached to the protrusion inlet portion of the forceps plug main body are both formed of an elastic member. The closure film pushed open by the treatment instrument inserted into the treatment instrument insertion channel is an endoscope forceps plug provided on the forceps plug body and the lid body, and a circumferential groove is formed in the outer periphery of the forceps plug body. An annular inward projection that can be engaged with and disengaged from the circumferential groove is formed at the tip of the annular wall protruding from the lid body so as to surround the forceps plug body. In the forceps plug of the endoscope configured so that the inward projection portion slides in a state of being elastically deformed and pushed along the outer periphery of the forceps plug body and then engages with the circumferential groove. The inwardly protruding part of the body is elastically deformed and the slant is formed along the outer periphery of the forceps plug body. A vent groove is formed in the outer periphery of the forceps plug main body so that the space surrounded by the outer periphery of the forceps plug main body and the annular wall of the lid body communicates with the outside and the air in the space is discharged to the outside. Form.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 4, reference numeral 1 denotes an insertion part of a flexible endoscope, and 2 denotes an operation part connected to the proximal end of the insertion part 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. Reference numerals 12 and 14 denote a lid and a connecting belt-like member which will be described later.

  FIG. 1 shows a forceps plug 10. The forceps plug 10 includes a cylindrical forceps plug body 11 that is detachably attached to an inlet cap (not shown) of the treatment instrument insertion channel, and a lid that is detachable from the distal end side inlet portion 15 of the forceps plug body 11. It has a body 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 mouth of the treatment instrument insertion channel. Can be attached and removed in a tightened state.

  As shown in FIG. 2 illustrating a state in which the lid body 12 is removed from the forceps plug body 11, the lid body 12 is a connecting strip member 14 formed integrally with the lid body 12 by an elastic rubber material. The forceps plug body 11 is connected to the base portion of the forceps plug body 11 so that even if the forceps plug body 11 is detached from the forceps plug body 11, the forceps plug body 11 is hung in the vicinity thereof.

  Closure films 16 and 17 are formed in the forceps plug body 11 and the lid body 12, respectively, and the closure film 16 in the forceps plug body 11 is pushed open by a 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 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, the body sewage or the like is ejected from the treatment instrument insertion channel 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 outer periphery of the treatment tool is sealed by the small hole 18 and 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.

  A circumferential groove 21 is formed over the entire outer periphery of the forceps plug body 11 near the proximal end, and covers the periphery of the portion of the forceps plug body 11 near the projecting end side entrance 15. An annular wall 22 is formed protruding from the body 12 side.

  An annular 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 circumferential portion of the distal end portion of the annular wall 22. The protrusion 23 can be engaged with and disengaged from the circumferential groove 21 by sliding along the outer periphery of the forceps plug body 11.

  The outer peripheral portion of the forceps plug body 11 has a reverse taper that gradually decreases in diameter from the protruding end side to a portion near the protruding end so that the annular wall 22 smoothly covers the forceps plug main body 11 when the lid 12 is attached. A surface 25 is formed, a large-diameter portion 26 having a diameter larger than that of the protruding end portion is formed in the intermediate portion, and a circumferential groove 21 is formed adjacent to the base side of the large-diameter portion 26. Accordingly, the inward projection 23 portion of the lid body 12 is elastically deformed into a state where the inner protrusion 23 is pushed and widened when the large-diameter portion 26 is passed over, and after sliding in this state, the inner projection 23 is engaged with the circumferential groove 21.

  On the outer peripheral portion of the large-diameter portion 26 of the forceps plug main body 11, when the inner protrusion 23 portion of the lid body 12 is elastically deformed and slid, the outer peripheral portion of the forceps plug main body 11 and the ring shape of the lid body 12 are A ventilation groove 27 is formed to allow the space A (see FIG. 6) surrounded by the wall 22 to communicate with the outside to discharge the air in the space A to the outside.

  As shown in FIG. 3 which is an external view of the state in which the lid 12 is removed from the forceps plug main body 11, the ventilation grooves 27 are formed at four locations of the large diameter portion 26 at intervals of 90 °, for example. However, at least one may be formed.

  When the lid 12 is slid into a state where the forceps plug body 11 is covered with the forceps plug body 11 as shown in FIGS. While the inner projection 23 is engaged with the circumferential groove 21 from the state shown in FIG. 6 in which 23 is in contact with the large diameter portion 26, the outer peripheral portion of the forceps plug body 11 and the annular wall 22 of the lid 12. The space A surrounded by is compressed.

  However, when the air in the space A is compressed, the air passes through the ventilation groove 27 and is quickly discharged from the circumferential groove 21 to the outside. Therefore, in the forceps plug of the endoscope of the present invention, as shown in FIGS. 7 and 8, the inward projection 23 of the lid 12 is properly engaged with the circumferential groove 21 of the forceps plug body 11. The lid 12 can be attached to the forceps plug body 11 smoothly and reliably, and in-vivo squirting from the treatment instrument insertion channel due to the uncertain attachment of the forceps plug 10 can be prevented. In addition, illustration of the connection strip | belt-shaped member 14 is abbreviate | omitted in FIGS.

It is side surface sectional drawing of the forceps stopper of the endoscope of the Example of this invention. It is side surface sectional drawing of the state from which the lid body of the forceps plug of the endoscope of the Example of this invention was removed from the forceps plug main body. It is an external appearance perspective view in the state where the lid of the forceps plug of the endoscope of the embodiment of the present invention was removed from the forceps plug body. 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 which shows the 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 which shows the 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 state in which the cover body of the forceps plug of the endoscope of the Example of this invention was attached to the forceps plug main body. It is an external appearance perspective view of the state where the lid of the forceps plug of the endoscope of the embodiment of the present invention is attached to the forceps plug body. It is side surface sectional drawing of the forceps stopper of the conventional endoscope. It is side surface sectional drawing of the state from which the cover body of the forceps plug of the conventional endoscope was removed from the forceps plug main body. It is side surface sectional drawing which shows the 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 which shows the 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 which shows the 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 10 Forceps plug 11 Forceps plug main body 12 Cover body 16 Closure membrane 17 Closure membrane 18 Small hole 19 Slit 21 Circumferential groove 22 Annular wall 23 Inward protrusion 25 Reverse taper surface 26 Large diameter part 27 Ventilation groove A Space

Claims (3)

A cylindrical forceps plug main body whose base is attached to the entrance portion of the treatment instrument insertion channel of the endoscope and a lid body detachably attached to the protrusion inlet portion of the forceps plug main body are both formed by an elastic member. The closing membrane 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 the outer periphery of the forceps plug body An annular inward protrusion that is detachable with respect to the circumferential groove at a tip portion of an annular wall that is formed from the lid side so as to surround the forceps plug body and has a circumferential groove formed in the portion. Is formed so that the inward protruding portion of the lid slides in an elastically deformed and extended state along the outer peripheral portion of the forceps plug body and then engages with the circumferential groove. In the endoscopic forceps plug,
When the inward protruding portion of the lid is elastically deformed and slides along the outer periphery of the forceps plug body, the space surrounded by the outer periphery of the forceps plug body and the annular wall of the lid body and the outside and communicates the door ventilation grooves for discharging to the outside air in the space is formed in the outer peripheral portion of the forceps plug body,
The vent groove has a large diameter that is formed to protrude in the radial direction over the entire circumference of the outer periphery of the forceps plug body adjacent to the circumferential groove at a position closer to the tip end entrance side of the forceps plug body than the circumferential groove. Is formed in a state of being recessed from the outer edge side of the large-diameter portion, and the groove width of the ventilation groove is gradually increased toward the outer edge side of the large-diameter portion, and the groove width increases in the vicinity of the outer edge. Endoscopic forceps plug, characterized in that the change in direction is greatly formed .   The endoscopic forceps plug according to claim 1, wherein the ventilation groove is formed so as to communicate with the circumferential groove.   The forceps plug for an endoscope according to claim 1 or 2, wherein a plurality of the ventilation grooves are formed on the outer peripheral portion of the forceps plug body at one or a plurality of intervals in the circumferential direction.

Images