JP2005137528A - Structure of forceps plug attaching part of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a forceps plug attaching part of an endoscope for stably operating an injection cylinder without a forceps plug being significantly wobbled even in the case of performing a liquid chemical injecting operation by inserting the injection cylinder to the forceps plug. <P>SOLUTION: First and second circumferential grooves 32A and 32B are parallelly formed on the outer peripheral surface of a part projected from the surface of an operation part 2 of a treating tool insertion base 30. Inside a recessed part 19 of the forceps plug 10, first and second small diameter parts 13A and 13B to be fitted to the first and second circumferential grooves 32A and 32B when the treating tool insertion base 30 is fitted are projectingly formed from an inner peripheral wall to the inner part. While the treating tool insertion base 30 is fitted to the recessed part 19 of the forceps plug 10, the state that the first and second recessed parts 19 respectively tighten the bottom surfaces of the first and second circumferential grooves 32A and 32B is attained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure of a forceps plug mounting portion of an endoscope.

  In general, a forceps plug of an endoscope can be freely fitted with a treatment tool insertion cap protruding from an operation section as an inlet of a treatment tool insertion channel at the bottom of a rubber forceps plug having a closing membrane pushed open by a treatment tool or the like. A concave part is formed, and the forceps plug is attached to and detached from the treatment tool insertion base by attaching and detaching the treatment tool insertion base to the concave part.

In the state where the forceps plug is attached to the treatment instrument insertion base, a circumferential groove formed on the outer peripheral surface of the treatment instrument insertion base has a small diameter portion that protrudes inward from the inner wall surface of the recess of the forceps plug. So that the forceps plug is not easily detached from the treatment instrument insertion base (for example, Patent Document 1).
JP 2001-218732 A

  The forceps plug attached to the treatment instrument insertion cap protruding from the operation portion is subjected to an irregular force acting sideways or obliquely when inserting or removing the treatment instrument or the like. When a medical solution or the like is poured into the treatment instrument insertion channel and a force is greatly applied to the forceps plug, the forceps plug may be applied.

  Then, in the structure of the forceps plug mounting portion of the conventional endoscope, as illustrated in FIG. 4, the small diameter portion 13 on the side of the forceps plug 10 fitted in the circumferential groove 32 of the treatment instrument insertion base 30. As a result, the forceps plug 10 is largely fluctuated around the center, and the operation of the syringe barrel 50 becomes unstable. In some cases, the forceps plug 10 may be detached from the treatment instrument insertion base 30. Reference numeral 19 denotes a recess formed on the bottom surface of the forceps plug 10.

  Therefore, the present invention provides a forceps plug for an endoscope that can stably operate the syringe barrel without causing a large fluctuation of the forceps plug even when the syringe barrel is inserted into the forceps plug and the liquid medicine injection operation is performed. It aims at providing the structure of an attaching part.

  In order to achieve the above-mentioned object, the structure of the forceps plug mounting portion of the endoscope of the present invention is used as an entrance of a treatment instrument insertion channel at the bottom of a rubber forceps plug having a closing membrane pushed open by a treatment instrument or the like. An endoscope in which a treatment tool insertion cap projecting from an operation portion is freely fitted and a forceps plug is attached to and detached from the treatment tool insertion cap by attaching and detaching the treatment tool insertion cap to the recess. In the structure of the forceps plug attachment portion, the first and second circumferential grooves are formed in parallel on the outer peripheral surface of the portion protruding from the surface of the operation portion of the treatment instrument insertion base, The first and second small-diameter portions that are fitted into the first and second circumferential grooves when the tool insertion base is fitted are formed so as to protrude inward from the inner peripheral wall.

  In the state where the treatment instrument insertion cap is fitted in the recess of the forceps plug, the first and second recesses may be in a state of tightening the bottom surfaces of the first and second circumferential grooves, respectively.

  According to the present invention, the first and second small diameter portions of the forceps plug are fitted in the first and second circumferential grooves formed in parallel on the outer peripheral surface of the treatment instrument insertion base. When a syringe is inserted into the syringe and a liquid injection operation is performed, even if a large squeezing force is applied to the forceps plug, the forceps plug does not fluctuate greatly because each small diameter part is caught in each circumferential groove. The cylinder can be operated stably.

  The first and second circumferential grooves are formed in parallel on the outer peripheral surface of the portion protruding from the surface of the operation portion of the treatment instrument insertion base. When the treatment instrument insertion base is fitted in the concave portion of the forceps plug, the first and second circumferential grooves are formed. In the state where the first and second small-diameter portions fitted into the first and second circumferential grooves are formed to project inward from the inner peripheral wall, and the treatment instrument insertion cap is fitted into the concave portion, the first and second The two recesses are in a state where the bottom surfaces of the first and second circumferential grooves are tightened.

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

  The distal end of the treatment instrument insertion channel 3 inserted in the insertion section 1 opens to the outside at the distal end of the insertion section 1, and the forceps plug 10 disposed at the inlet portion of the treatment instrument insertion channel 3 is connected to the lower end of the operation section 2. It arrange | positions in the state which protrudes diagonally upward from a part. A syringe barrel 50 is inserted into the forceps plug 10 in the same manner as the treatment instruments.

  FIG. 1 shows a state in which the forceps plug 10 is attached to a treatment instrument insertion base 30 provided at the inlet end of the treatment instrument insertion channel 3, and the treatment instrument insertion base 30 is connected to the treatment instrument insertion channel 3. Is arranged in a state of projecting from the outer wall surface of the operation unit 2.

  The forceps plug 10 includes a barrel-shaped member 11 formed of an elastic rubber material, and a lid-shaped member 12 formed of an elastic rubber material, which is also detachably attached. ing.

  A concave portion 19 that is recessed inward from the bottom surface side is formed at the axial position of the bottom portion of the barrel-shaped member 11, and the forceps plug 10 is fitted into the concave portion 19 by fitting the treatment instrument insertion base 30 from the bottom surface side. When the forceps plug 10 is pulled up by applying force to the treatment tool insertion base 30, the recess 19 is disengaged from the treatment tool insertion base 30.

  In the center of the barrel-shaped member 11, an auxiliary closing film 14 having a small hole 15 formed at the axial position is formed on the back end wall portion of the recess 19 so as to face the opening of the treatment instrument insertion base 30. When the treatment tool to be inserted into and removed from the treatment tool insertion channel 3 passes through the treatment tool insertion channel 3, the small hole 15 is elastically pushed and expanded by the treatment tool and closely contacts the outer peripheral surface of the treatment tool. And the outside is sealed. The liquid or the like ejected from the syringe barrel 50 passes through the small hole 15 as it is.

  In the central part of the lid part of the lid-like member 12, a fitting part 25 that is detachable from the outside is projected and formed at the upper end opening of the barrel-like member 11, and on the inner surface of the annular part that surrounds the fitting part 25 like an outer ring mountain. The formed flange 24 is detachable with respect to the circumferential groove 17 formed on the outer periphery of the barrel-shaped member 11.

  Then, if the lid-like member 12 side is elastically deformed and the collar portion 24 is engaged with the circumferential groove 17, the lid-like member 12 is locked to the opening of the barrel-like member 11, The lid-like member 12 can be removed from the upper end opening of the barrel-like member 11 by elastically deforming the flange 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 protruding end wall portion of the fitting portion 25 protruding from the lid-like member 12 is a closing film 26, and a “−”-shaped slit 27 is formed in the central portion 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.

  In the treatment instrument insertion base 30, first and second circumferential grooves 32 </ b> A and 32 </ b> B are formed in parallel on the outer peripheral surface of the portion protruding from the outer surface of the operation unit 2. In this embodiment, the first circumferential groove 32 </ b> A formed on the protruding end side of the treatment instrument insertion base 30 is formed along the outer surface of the operation unit 2, and the second circumferential groove 32 </ b> B. It is formed wider and with a smaller diameter.

  In the recess 19 of the forceps plug 10, the first and second small-diameter portions 13 </ b> A that are fitted into the first and second circumferential grooves 32 </ b> A and 32 </ b> B when the treatment instrument insertion cap 30 is fitted into the recess 19. 13B is formed to protrude inward from the inner peripheral wall of the recess 19.

  The inner diameters of the first and second small diameter portions 13A and 13B of the concave portion 19 of the forceps plug 10 are formed smaller than the diameters of the groove bottoms of the first and second circumferential grooves 32A and 32B of the treatment instrument insertion base 30, respectively. The small diameter portions 13A and 13B are attached in a state where the circumferential grooves 32A and 32B are tightened. FIG. 1 shows the original shape (before elastic deformation) of each of the small diameter portions 13A and 13B.

  When the syringe barrel 50 is inserted from the outside into the forceps plug 10 of the embodiment configured as described above and an operation such as chemical injection is performed, a large twisting force acts on the forceps plug 10 as shown in FIG. As a result, the forceps stopper 10 is tilted with respect to the treatment instrument insertion base 30.

  However, the first and second circumferential grooves 32A and 32B in which the first and second small-diameter portions 13A and 13B formed in the concave portion 19 of the forceps plug 10 are formed in parallel to the treatment instrument insertion base 30, respectively. By being attached in a state where the bottom surface is tightened, the side wall portion of the second small-diameter portion 13B is formed on the side where the second circumferential groove 32B is about to jump out of the second small-diameter portion 13B. It catches on the side wall surface of the circumferential groove 32B.

  On the opposite side (b), the second small diameter portion 13B is pressed against the bottom surface of the second circumferential groove 32B and receives a repulsive force. As a result, the forceps plug 10 does not wobble greatly, and the forceps plug 10 does not come off the treatment instrument insertion base 30 even if a considerably large squeezing force acts on the forceps plug 10.

  However, if the forceps plug 10 is directly picked up with a fingertip and a large force is applied in the direction of further pulling up, the first and second small-diameter portions 13A and 13B of the forceps plug 10 are greatly elastically deformed and treated. The forceps plug 10 can be removed from the treatment instrument insertion base 30 by detaching from the first and second circumferential grooves 32A and 32B of the instrument insertion base 30.

It is side surface sectional drawing of the structure of the forceps stopper attachment part 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 the use condition by which the injection cylinder was inserted in the forceps stopper of the Example of this invention. It is side surface sectional drawing of the use condition by which the injection cylinder was inserted in the conventional forceps stopper.

Explanation of symbols

2 Operation part 3 Treatment tool insertion channel 10 Forceps plug 13A, 13B Small diameter part 19 Recessed part 30 Treatment tool insertion base 32A, 32B Circumferential groove

Claims (2)

At the bottom of a rubber forceps plug having a closing membrane that is pushed open by a treatment instrument or the like, a recess is formed into which a treatment tool insertion base projecting from an operation section as an entrance of a treatment instrument insertion channel can be fitted. In the structure of the forceps plug mounting portion of the endoscope in which the forceps plug is attached to and detached from the treatment tool insertion base by detaching the treatment tool insertion base.
First and second circumferential grooves are formed in parallel on the outer peripheral surface of the portion of the treatment instrument insertion base protruding from the surface of the operation portion, and the treatment instrument insertion base is fitted into the recess of the forceps plug. A forceps plug mounting portion for an endoscope characterized in that the first and second small-diameter portions that are fitted into the first and second circumferential grooves when protruded are projected inward from the inner peripheral wall. Structure. 2. The state in which the first and second recesses tighten the bottom surfaces of the first and second circumferential grooves in a state where the treatment instrument insertion cap is fitted in the recess of the forceps plug, respectively. Of the forceps plug mounting portion of the endoscope.

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