JP4338482B2 - Endoscope forceps plug - Google Patents

Description

  The present invention relates to an endoscopic forceps plug.

The forceps plug of an endoscope generally has a closing membrane made of an elastic member in which a slit that is pushed open by a treatment instrument or the like is formed, and the treatment instrument or the like is placed on the back side of the closure membrane. When this is pushed into the slit from the front surface side, a space is formed for the closure membrane to elastically deform and expand to the back surface side (for example, Patent Document 1).
JP 2001-275946, FIG.

  The closure film of the forceps plug of an endoscope is repeatedly deformed and bulges to the back side every time a treatment instrument or the like is pushed into the slit, so that cracks outward from the end of the slit during repeated use. If it occurs and the crack becomes large, the airtightness may be lowered to a level where it cannot be used as a forceps plug.

  Therefore, an object of the present invention is to provide a highly durable endoscope forceps plug that can be used for a long period of time without cracks generated from the slit end even after repeated use.

  In order to achieve the above object, the forceps plug of the endoscope of the present invention has a closing membrane made of a resilient member formed with a slit that is pushed open by a treatment instrument or the like, and from the surface side of the closing membrane. A space for the closure membrane to elastically deform and bulge to the back side when a treatment instrument or the like is pushed into the slit is formed between the non-deformation portion arranged at the back side away from the back side of the closure membrane In the endoscopic forceps plug, the bank-like portion that comes into contact with the non-deformable portion when the treatment instrument is pushed into the slit from the front side of the closure membrane and the closure membrane bulges to the back side, It is formed to project at the extended position of the slit on the back surface portion of the closing membrane.

  In addition, the bank-like part may be formed to project so as to surround both ends of the slit in a U-shape, or may be formed to project so as to entirely surround the slit.

  According to the present invention, when the treatment instrument or the like is pushed into the slit from the front surface side of the closing membrane and elastically deformed so that the closing membrane swells to the back side, the bank-like portion protruding from the back surface portion of the closing membrane is closed. Since it is in contact with the non-deformable part located at the far side away from the back surface of the membrane and further deformation of the closure membrane is restricted, cracks are unlikely to occur from the end of the slit. Even if a crack occurs, the area of the crack is restricted to the thick bank-like part because the bank-like part protrudes from the extended position of the slit on the back surface part of the closure membrane, so use repeatedly However, the crack which generate | occur | produces from a slit edge part does not spread, and the outstanding durability which can be used over a long period of time can be acquired.

  Place the non-deformation part that does not deform under the influence of the treatment tool etc. when it is pushed into the slit at the back position away from the back surface of the closure membrane, and the treatment tool etc. from the front side of the closure membrane to the slit A bank-like portion that comes into contact with the non-deformed portion when it is pushed in and elastically deforms in a state where the closing membrane swells to the back side is formed to project at the extended positions at both ends of the slit of the back side portion of the closing membrane.

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 1 denotes an endoscope insertion portion that is sheathed by a flexible tube, and its proximal end is connected to the lower end of the endoscope operation portion 2.

  The distal end of the treatment instrument insertion channel 3 inserted and disposed in the endoscope insertion portion 1 opens to the outside at the distal end of the endoscope insertion portion 1, and a forceps plug 10 disposed at the entrance portion of the treatment instrument insertion channel 3 is provided. The endoscope operation unit 2 is disposed so as to protrude obliquely upward from the lower end portion thereof. A syringe barrel 50 is inserted into the forceps plug 10 in the same manner as the treatment instruments.

  FIG. 1 shows a forceps plug 10 that is detachably attached to an inlet cap 30 provided at the inlet end of the treatment instrument insertion channel 3. The forceps plug 10 is made of a rubber material that is elastic or the like. A lid-like member 12 formed of an elastic rubber material or the like is detachably attached to the formed barrel-like member 11.

  The barrel-shaped member 11 has an elastic projection 13 projecting from the inner periphery of the barrel-shaped member 11 fitted in a circumferential groove 32 formed in the vicinity of the mouth of the inlet base 30, and elastically deforms the periphery of the elastic projection 13. The barrel-shaped member 11 can be attached to and detached from the inlet base 30 by engaging and disengaging with the circumferential groove portion 32.

  The barrel-shaped member 11 has an auxiliary closing film 14 having a small hole 15 formed in the center at a position facing the opening of the inlet base 30, and the treatment tool inserted into and removed from the treatment tool insertion channel 3. When passing therethrough, the small hole 15 is elastically pushed and widened by the treatment instrument and is brought into close contact with the outer peripheral surface of the treatment instrument, thereby sealing between the inside and outside of the treatment instrument insertion channel 3. The liquid or the like ejected from the syringe barrel 50 passes through the small hole 15 as it is.

  At the center of the lid-like member 12, a fitting part that is detachable from the outside protrudes from the opening of the barrel-like member 11, and a collar part 24 is formed on the inner surface of an annular portion surrounding the fitting part in an outer ring mountain shape. The barrel-shaped member 11 can be freely engaged with and disengaged from the circumferential groove 17 formed on the outer peripheral portion on the mouth side.

  Then, when the lid-like member 12 side is elastically deformed and the collar 24 is engaged with the circumferential groove 17 as shown in FIG. 1, the lid-like member 12 is engaged with the opening of the barrel-like member 11. The lid-shaped member 12 can be removed from the opening of the barrel-shaped member 11 by being in a stopped state and elastically deforming the collar portion 24 and removing it from the circumferential groove 17.

  A thin and long strip-shaped member 22 is integrally formed and extended on the lid-shaped member 12, and an annular portion 23 that engages and disengages with the barrel-shaped member 11 is integrally molded at the other end of the strip-shaped member 22. Is formed. And the circumferential groove | channel 20 with which the annular part 23 engages is formed in the outer periphery of the barrel-shaped member 11. FIG.

  The bottom portion of the fitting portion of the lid-like member 12 is a closing film 26, and a “-”-shaped slit 27 is formed at the center thereof. The slit 27 normally maintains a closed state by its own elasticity and seals between the inside of the treatment instrument insertion channel 3 and the outside, and is elastic by a treatment instrument inserted into and removed from the treatment instrument insertion channel 3. Pushed open.

  At a position facing the back surface of the closure film 26 in the barrel-shaped member 11, the non-deformation portion 25 that is not deformed by the influence of the treatment instrument or the like when pushed into the slit 27 from the outside is the closure film 26. The space between the back surface of the closure film 26 and the non-deformable portion 25 is a space for the closure film 26 to be elastically deformed and bulge to the back surface side. Yes.

  Then, on the back surface of the closure film 26, as shown in FIG. 3 illustrating the portion, the treatment instrument or the like is pushed into the slit 27 from the front surface side of the closure film 26, and the closure film 26 swells to the back surface side. A bank-like portion 28 that abuts against the non-deformable portion 25 when it is elastically deformed to the state (does not abut when the treatment instrument or the like is not pushed in) is formed to project at extended positions at both ends of the slit 27.

  As a result, as shown in FIG. 4, when the syringe barrel 50, the treatment instrument, etc. are pushed into the slit 27 from the front surface side of the closing membrane 26 and the closing membrane 26 bulges to the back surface side, Since 28 is brought into contact with the non-deformable portion 25 and further deformation of the closure film 26 is restricted, cracks are hardly generated from the end portion of the slit 27.

  In addition, as shown in FIG. 5, even if a crack 27 ′ occurs from the end of the slit 27, the bank-like portion 28 protrudes from the extended position of the slit 27 and the thickness of the closing film 26 is Due to the thickness of the portion, the range of the crack 27 ′ is restricted to the bank-like portion 28, and the crack 27 ′ generated from the end of the slit 27 does not spread greatly even after repeated use.

  Further, since the bank-shaped portion 28 contacts the non-deformable portion 25 on the upper end surface of the barrel-shaped member 11, the treatment instrument inserted into the slit 27 is guided in the direction of the small hole 15 without tilting. Good insertion operability can be obtained.

  Note that the present invention is not limited to the above-described embodiment. For example, the bank-shaped portion 28 may be formed so as to protrude in a U-shaped manner at both ends of the slit 27 as shown in FIG. Alternatively, as shown in FIG. 7, the slit 27 may be formed in an annular shape so as to entirely surround the slit 27.

It is side surface sectional drawing of the forceps stopper of the endoscope of the Example of this invention. It is a side view of the endoscope of the Example of this invention. It is a perspective view which shows the back surface part of the closure film | membrane of the forceps stopper of the endoscope of the Example of this invention. It is side surface sectional drawing of the state by which the injection cylinder was inserted in the forceps stopper of the endoscope of the Example of this invention. It is a bottom view in the state where the crack had arisen in the back surface of the closure membrane of the forceps stopper of the endoscope of the example of the present invention. It is a bottom view of the closure film | membrane of the forceps stopper of the endoscope of the 2nd Example of this invention. It is a bottom view of the closure film | membrane of the forceps stopper of the endoscope of the 3rd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Forceps stopper 25 Non-deformation part 26 Closure membrane 27 Slit 27 'Crack 28 Bank-like part 50 Syringe (treatment instrument etc.)

Claims (3)

It has a closing membrane made of a resilient member formed with a slit that is pushed open by a treatment instrument etc., and the closure membrane is elastically deformed when the treatment instrument etc. is pushed into the slit from the surface side of the closure membrane In the forceps plug of the endoscope formed between the non-deformable portion disposed in the back position away from the back surface of the closure membrane, the space for swelling on the back surface side,
A bank-like portion that comes into contact with the non-deformed portion when the treatment instrument or the like is pushed into the slit from the front side of the closure membrane and is elastically deformed in a state where the closure membrane swells to the back side, A forceps plug for an endoscope, wherein the forceps plug is formed so as to project at an extended position of the slit of the portion. The endoscopic forceps plug according to claim 1, wherein the bank-like portion is formed so as to protrude in a U-shape so as to surround both ends of the slit. The endoscopic forceps plug according to claim 1, wherein the bank-like portion is formed so as to protrude so as to surround the slit entirely.

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