JP4928929B2 - 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 of the endoscope.

  In general, a forceps plug of an endoscope is elastic in combination with a forceps plug body whose base is attached to an entrance portion of a treatment instrument insertion channel of the endoscope and a lid body detachably attached to a protruding end entrance portion of the forceps plug body. A closure film is formed on the lid, which is formed of a member having a slit and formed with a slit that is pushed open by a treatment instrument inserted into the treatment instrument insertion channel.

  However, if the treatment tool is repeatedly deformed each time it is pushed into the slit and bulges to the back side, repeated use will cause a crack to occur outward from the end of the slit, and the forceps plug will become airtight. It may decrease.

Therefore, conventionally, a bank-like portion that protrudes from the back side of the closure membrane into the tip entrance portion of the forceps plug body is projected at the extended position of the slit, and even if a crack extending from the slit occurs in the closure membrane, it is stopped by the bank-like portion. To prevent the crack from spreading further. Specifically, the bank-shaped part is formed only at the extended position of the slit, or is formed in an oval shape having the longitudinal direction of the slit as a major axis (for example, Patent Document 1).
JP2005-80867

  The slit formed in the closure membrane of the lid must be closed as tightly as possible so that the internal sewage does not squirt when the treatment instrument is not passed through. It is desirable to configure so that a tightening force is applied.

  Therefore, in a conventional endoscopic forceps plug such as the invention described in Patent Document 1, a tightening portion that receives a force for tightening a slit from the forceps plug main body side is provided on the lid. Since the tightening portion and the bank-shaped portion for preventing the crack of the slit are provided independently, there is a drawback that the forceps plug becomes large.

  The present invention provides a small-sized endoscopic forceps plug that does not spread a crack generated from the slit even when the insertion / removal of the treatment tool is repeated, and that the slit formed in the closure membrane of the lid closes firmly when the treatment tool is not used. An object of the present invention is to enable a compact configuration.

  In order to achieve the above object, the forceps plug of the endoscope of the present invention is detachable from the forceps plug body whose base is attached to the entrance portion of the treatment instrument insertion channel of the endoscope, and the tip end entrance portion of the forceps plug body An endoscope in which a closure film is formed on the lid, which is formed of an elastic member together with a lid attached to the lid, and is formed with a slit that is pushed open by a treatment instrument inserted into the treatment instrument insertion channel. In the forceps plug, a bank-like portion that protrudes from the position surrounding the slit on the back side of the closure membrane into the tip entrance portion of the forceps plug body is formed, and the inner peripheral wall surface of the bank-like portion is a circular shape with the slit in the diameter position The outer peripheral wall surface of the bank-shaped part is formed in a substantially oval shape with the longitudinal direction of the slit as the short axis.

  When the inner peripheral wall surface of the tip entrance portion of the forceps plug body is formed in a circular shape and the lid is attached to the forceps plug body, the outer peripheral wall surface of the bank-shaped portion of the lid body is a long axis having a substantially oval shape. In the direction, it is preferable that the forceps plug is tightly press-fitted into the tip entrance portion and is loosely fitted in the minor axis direction.

  In addition, a stepped portion that contacts the tip of the bank-shaped portion of the lid body is formed in the tip entrance portion of the forceps plug body, and when the lid is attached to the forceps plug body, the tip of the bank-shaped portion is the stepped portion. You may make it be in the state pressed against.

  According to the present invention, the bank-like portion is formed to protrude from the position surrounding the slit on the back side of the closure membrane into the tip entrance portion of the forceps plug body, and the inner peripheral wall surface of the bank-like portion has the slit in the diameter position. Since the outer peripheral wall surface of the bank-shaped part is formed in a substantially oval shape with the longitudinal direction of the slit as the short axis, cracks generated from the slit even when the treatment tool is repeatedly inserted and removed are formed. The forceps plug of the endoscope that does not spread and closes firmly when the treatment tool is not used can be configured compactly and compactly.

  A 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 protruding end entrance portion of the forceps plug main body are both formed by an elastic member, In a forceps plug of an endoscope in which a closure membrane formed with a slit to be pushed open by a treatment instrument inserted into a device insertion channel is formed on a lid, the tip of the forceps plug body from a position surrounding the slit on the back side of the closure membrane A bank-like part protruding into the entrance part is formed, and the inner peripheral wall surface of the bank-like part is formed in a circular shape with the slit in the diameter position, and the outer peripheral wall surface of the bank-like part is a short axis in the longitudinal direction of the slit It is formed in a substantially oval shape.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 8, 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 main body 11 of a forceps plug 10 is detachably attached to the section 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.

  3 and 4 are longitudinal sectional views in a cross section of the forceps plug 10 in a direction different by 90 °, and FIG. 5 is a perspective view. The forceps plug 10 includes a forceps plug main body 11 formed in a substantially cylindrical shape that is detachably attached to an inlet base of a treatment instrument insertion channel 3 (not shown), and a forceps from the protruding end inlet 15 side of the upper end of the forceps plug main body 11. A substantially cap-like lid body 12 that is detachably attached in a state of covering the stopper body 11 is provided, and the whole is made of an elastic rubber material or the like.

  A small-diameter portion 13 that is detachable with respect to the inlet base of the treatment instrument insertion channel 3 is formed in a portion near the proximal end of the inner surface of the forceps plug main body 11, and the small-diameter portion 13 is elastically deformed so as to elastically deform the treatment instrument. The inlet base of the insertion channel 3 can be attached and removed in a tightened state.

  The lid body 12 is connected to the base portion of the forceps plug body 11 by a connecting band-like member 14 formed integrally with the lid body 12 by an elastic rubber material, and as shown in FIGS. Even if the lid 12 is removed from the forceps plug body 11, it is in a state of being hung near it.

  Returning to FIG. 3 and FIG. 4, a closing film 17 and an auxiliary closing film 16 are formed on the lid 12 and the forceps plug body 11. The auxiliary closing membrane 16 is formed with a small hole 18 that is pushed open by the treatment instrument inserted through the treatment instrument insertion channel 3, and the closure membrane 17 is pushed open by the treatment instrument inserted through the treatment instrument insertion channel 3. A slit 19 is formed.

  Therefore, when the lid 12 is attached to the forceps plug body 11 and the treatment instrument is not used, the treatment instrument insertion channel is formed by the slit 19 formed in the closure film 17 and the small hole 18 formed in the auxiliary closure film 16. It is sealed so that internal sewage or the like is not ejected from the inside.

  A circumferential groove 21 is formed on the outer peripheral portion of the forceps plug main body 11 near the base end so as to be recessed from the outer peripheral surface over the entire periphery. An annular wall 22 is formed on the lid 12 side so as to surround the outer periphery of the forceps plug body 11, and an annular inward protrusion 23 that can be engaged with the circumferential groove 21 over the entire circumference is formed in the annular wall. 22 is formed so as to project inward from the entire circumference of the inner circumferential portion of the tip portion.

  The inward projection 23 can elastically deform the annular wall 22 to be engaged with and disengaged from the circumferential groove 21, and a retaining engagement portion for preventing the lid body 12 from coming off from the forceps plug body 11 has a circular shape. A circumferential groove 21 and an inward projection 23 are included.

  A large diameter portion 26 having a diameter larger than that of the upper end portion is formed at an intermediate portion of the outer peripheral portion of the forceps plug main body 11, and a circumferential groove 21 is formed to be recessed over the entire circumference adjacent to the base side of the large diameter portion 26. Has been.

  The outer peripheral portion of the large-diameter portion 26 is surrounded by the outer peripheral portion of the forceps plug body 11 and the annular wall 22 of the lid body 12 when the inward projection 23 portion of the lid body 12 is elastically deformed and slides. A ventilation groove 27 is formed to communicate the space with the outside.

  As shown in FIGS. 3, 4, and 1, the lid 12 has a bank-like portion 30 that protrudes into the protruding end inlet portion 15 of the forceps plug body 11 from a position surrounding the slit 19 on the back side of the closing membrane 17. Is formed. Therefore, even when the insertion / removal of the treatment tool is repeated and a crack extending outward from the end of the slit 19 occurs in the closing film 17, the crack is stopped by the bank 30 and does not spread further.

  As shown in FIG. 2, which is a cross-sectional view of the bank-shaped portion 30, the inner peripheral wall surface 30 i of the bank-shaped portion 30 is formed in a circular shape with the slit 19 in the diameter position, and the outer periphery of the bank-shaped portion 30. The wall surface 30 o is formed in a substantially oval shape having the longitudinal direction of the slit 19 as a short axis. The “substantially oval shape” is a concept including an oval shape, an oval shape, and the like. In addition, FIG. 3 mentioned above shows the III-III cross section in FIG. 2, and FIG. 4 has shown the IV-IV cross section.

  As shown in FIGS. 3 and 4, the stepped portion 31 with which the tip of the bank-shaped portion 30 abuts is formed in the protruding end entrance portion 15 of the forceps plug main body 11, and the lid body 12 is When attached to the forceps plug body 11, the tip of the bank-like portion 30 is pressed against the step portion 31.

  In addition, since the inner peripheral wall surface of the tip inlet portion 15 positioned so as to surround the bank-shaped portion 30 at that time is formed in a circular shape, when the lid body 12 is attached to the forceps plug main body 11, the bank-shaped portion of the lid body 12 is formed. As shown in FIG. 4, the outer peripheral wall surface 30o of 30 is tightly press-fitted into the tip end entrance 15 of the forceps plug body 11 as shown in FIG. 4 in the major axis direction, and as shown in FIG. 3 in the minor axis direction. It is in a loosely fitted state.

  Therefore, when the bank-like part 30 is fitted into the tip inlet part 15, the force for tightening the slit 19 in the closing direction acts on the bank-like part 30 from the inner peripheral wall surface of the tip inlet part 15, and the treatment tool is not used. Even at times, the slit 19 closes firmly and filth does not leak out.

Thus, in the present invention, the single bank-shaped portion 30 exhibits both functions of preventing the spread of cracks from the slit 19 and increasing the closing force of the slit 19, and configures the forceps plug 10 to be small and compact . be able to.

It is a perspective view which cut | disconnects and shows a part of lid body of the forceps plug of the endoscope of the Example of this invention. It is sectional drawing of the state which cut the bank-like part of the forceps stopper of the endoscope of the Example of this invention into a circle. It is a longitudinal cross-sectional view in the surface (III-III cross section in FIG. 2) containing the slit of the forceps stopper of the endoscope of the Example of this invention. It is a longitudinal cross-sectional view in the surface (IV-IV cross section in FIG. 2) orthogonal to the slit of the forceps plug of the endoscope of the Example of this invention. It is an external appearance perspective view of the forceps stopper of the endoscope of the Example of this invention. It is a longitudinal cross-sectional view of the state in which the lid body of the forceps plug of the endoscope of the embodiment of the present invention is removed from the forceps plug 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.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Treatment tool insertion channel 10 Forceps stopper 11 Forceps stopper main body 12 Lid body 15 Protrusion inlet part 17 Closure membrane 19 Slit 30 Bank-like part 30i Inner peripheral wall surface 30o Outer peripheral wall surface 31 Step part

Claims (2)

A 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, In the forceps plug of the endoscope in which a closure membrane formed with a slit to be pushed open by the treatment instrument inserted into the treatment instrument insertion channel is formed on the lid body,
A bank-like portion that protrudes from the position surrounding the slit on the back side of the closure membrane into the tip entrance portion of the forceps plug body is formed, and the bank-like portion further extends from the periphery of the region closer to the back side of the slit. be formed in a range on the rear side, not formed on the periphery of the front side of the region of the slit, an inner peripheral wall surface of the bank-shaped portion is formed in a circular shape placed on SL slit diametrically position , the outer peripheral wall surface of the bank-shaped portion is formed in a substantially elliptical shape with the longitudinal direction of the upper Symbol slit and the minor axis, the inner peripheral wall surface of the tip inlet portion of the forceps plug body is formed in a circular shape, the lid When the body is attached to the tip end portion of the forceps plug body, the outer peripheral wall surface of the bank-shaped portion of the lid body is tightly press-fitted into the tip end entrance portion of the forceps plug body in the substantially oval long axis direction. In the minor axis direction, it is loosely fitted To become, forceps plug of the endoscope force tightening the closing direction the slit, characterized in that acting against the bank-shaped portions from the inner wall surface of the tip inlet portion of the forceps plug body. In the state where the tip of the bank-shaped portion of the lid is in contact with the tip end entrance of the forceps plug body, the tip of the bank-shaped portion is in a state where the lid is attached to the forceps plug body. claim 1 Symbol placement of an endoscopic forceps plug of but a state of being pressed to the stepped portion.

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