JPH04327826A - Endoscope - Google Patents

Abstract

PURPOSE:To reduce the resistance of a forceps stopper to the passage of a treatment tool of large diameter so as to enable the load of an operator to be reduced by preventing the resistance of the forceps stopper to the passage from increasing when inserting the treatment tool of large diameter while keeping the airtightness of a treatment-tool inserting portion high. CONSTITUTION:A treatment-tool inserting hole 32 is provided at the aft end portion of a forceps stopper 30 which end extends in the direction of insertion of a treatment tool and also a protruding portion 34a having a diameter smaller than that of the treatment tool and projecting in the direction of the inner periphery of the stopper 30 is disposed at the starting end of the stopper 30 which end extends in the direction of insertion of the treatment tool. A thin wall portion 35 whose thickness gets smaller in the direction of the circumference of the stopper from the starting end of the direction of insertion of the treatment tool and which serves as a bent portion during insertion of the treatment tool is provided in such a way as extending from the protruding portion 34a to the starting end of the direction of insertion of the treatment tool. An introducing portion 31 communicated with the inserting hole 32 and open to the starting end of the direction of insertion of the treatment tool is disposed. As a result, when the treatment tool of large diameter is inserted with the airtightness of the treatment-tool inserting portion held high, the resistance of the forceps stopper 30 to the passage of the treatment tool can be prevented from increasing and thereby the load of an operator can be reduced.

Description

[Detailed description of the invention]

[Purpose of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope for observing the inside of a body cavity of a living body and inserting a treatment instrument therein for treatment.

0002

[Prior Art] An endoscope that observes the inside of a living body's body cavity and performs treatment by inserting a treatment tool is provided with a treatment tool insertion channel for inserting a treatment tool such as forceps. The insertion channel communicates from the treatment instrument insertion section in the operation section of the endoscope to the distal end of the endoscope.

[0003] Therefore, by guiding the distal end portion of the treatment instrument into the body cavity through the treatment instrument insertion channel,
It is possible to perform treatments such as excision and collection of diseased sites inside body cavities.

[0004] When the pressure inside the body cavity is high, air and dirt in the body cavity are ejected out of the body through the treatment instrument insertion channel. A plug is provided in the treatment instrument insertion part,
This is prevented.

[0005] However, in many cases, the insertion hole alone cannot maintain airtightness of the insertion part of the treatment instrument when the treatment instrument is inserted.
As shown in FIG. 6, a protrusion 4a protruding in the inner circumferential direction with a diameter smaller than the diameter of the treatment instrument is provided on the seal portion 4 at the end of the forceps plug 1 in the treatment instrument introduction direction, so that when the treatment instrument is inserted, An endoscope has been implemented that uses a forceps plug that utilizes the insertion resistance generated in the protrusion 4a in addition to the insertion resistance generated in the insertion hole 2 to improve airtightness when inserting the treatment instrument.

However, in conventional endoscopes using such forceps plugs, as the diameter of the treatment instrument inserted into the body cavity increases, the insertion resistance at each part of the forceps plug increases. Therefore, when a treatment instrument with a large diameter is inserted, there is a problem that the insertion performance of the treatment instrument deteriorates and the burden on the operator increases.

[0007]

[Problems to be Solved by the Invention] As described above, in the conventional endoscope, a protrusion projecting in the inner circumferential direction with a diameter smaller than the diameter of the treatment instrument is attached to the seal portion of the forceps plug at the treatment instrument introduction end. In addition to the insertion resistance generated at the insertion hole when the treatment instrument is inserted into the forceps plug, the insertion resistance generated at the protrusion is also utilized to improve airtightness when the treatment instrument is inserted.

Therefore, as the diameter of the treatment instrument increases, the insertion resistance at each part of the forceps plug increases, and when a treatment instrument with a large diameter is inserted, the insertion performance of the treatment instrument deteriorates and operation becomes difficult. There was a problem in that the burden on people became heavy.

The present invention solves the above-mentioned problems, and while maintaining high airtightness of the treatment instrument insertion portion when inserting the treatment instrument, insertion resistance becomes significantly large when a treatment instrument with a large diameter is inserted. The purpose of the present invention is to provide an endoscope using a forceps plug that prevents this and reduces the burden on the operator. [Structure of the invention]

0010

[Means for Solving the Problems] In order to achieve the above object, the endoscope of the present invention has a forceps plug made of an elastic material provided in the treatment instrument insertion portion of the treatment instrument insertion channel, and the a treatment instrument insertion hole provided in the treatment instrument insertion hole; a protrusion provided on the starting end side of the treatment instrument insertion direction from the treatment instrument insertion hole and protruding in the inner peripheral direction with a diameter smaller than the diameter of the treatment instrument; and a treatment instrument insertion hole provided in the treatment instrument insertion hole; a thin walled portion provided on the starting end side in the treatment instrument insertion direction and having a thinner wall thickness in the circumferential direction at least than the starting end side in the treatment instrument insertion direction and which becomes a bending portion when the treatment instrument is inserted; It is characterized by comprising an introduction section.

[0011]

[Operation] In the endoscope configured as described above, when the treatment tool is inserted into the forceps plug, the treatment tool uses the thin wall portion as a fulcrum to push open the protrusion toward the outer periphery, and the insertion hole also opens in the direction in which the insertion hole is opened. Since force is applied to the insertion hole, insertion resistance of the treatment tool in the insertion hole can be reduced.

0012

[Example] An example will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall structure of an endoscope according to the present invention, and FIG. 2 is a longitudinal sectional view showing a forceps plug in the endoscope according to the first embodiment.

As shown in FIG. 1, the endoscope 10 has an operating section 1.
The operating section 12 is connected by a universal cord 15 to a device 11 for displaying images and the like.

The insertion portion 14 also includes a flexible soft portion 16, an angle portion 17 connected to the tip of the soft portion 16 and provided so as to be bendable, and a hard portion 18 connected to the tip of the angle portion 17. It consists of

The operation section 12 is provided with a treatment instrument insertion section 20, and treatment instruments such as forceps are inserted through the treatment instrument insertion section 20 through treatment instrument insertion channels (not shown) provided in the operation section 12 and the insertion section 14. ) is guided into the body cavity. As shown in FIG. 2, the treatment instrument insertion section 20 is provided with a forceps opening 21, and a forceps plug 30 is attached thereto. The forceps plug 30 is a cylindrical object made of an elastic material, and is provided with an insertion hole 32 such as a small hole or a slit in the treatment instrument insertion direction. The terminal end side of the forceps plug 30 in the insertion direction of the treatment instrument is a seal portion 34, and is provided with a protrusion 34a projecting in the inner circumferential direction and having a smaller diameter than the diameter of the treatment instrument.

Further, the starting end side of the treatment tool insertion direction from the seal portion 34 communicates with the insertion hole 32 and opens toward the treatment tool insertion direction starting end side, and the minimum opening diameter is larger than the diameter of the treatment tool and the treatment tool insertion direction side communicates with the insertion hole 32. The introduction part 31 is provided so that the opening diameter becomes larger toward the starting end.

Further, on the protruding portion 34a of the seal portion 34 toward the starting end in the treatment instrument insertion direction, there is a thin wall portion 35 that is thinner in the circumferential direction than at least on the starting end side in the treatment instrument insertion direction and becomes a bending portion when the treatment instrument is inserted. It is provided. Further, a flange portion 36 protruding toward the outer circumference is formed at the starting end in the treatment instrument insertion direction, and is adapted to fit into a protrusion 21a formed in the forceps mouth portion 21.

In the endoscope 10 formed as described above, when a treatment instrument is inserted through the forceps plug 30 provided at the forceps opening 21 of the treatment instrument insertion section 20, the treatment instrument is inserted into the forceps plug 30. The introduction part 31 is inserted closely into the protrusion 34a of the seal part 34 and the insertion hole 32, and the operation part 12 and the insertion part 1 are inserted closely.
The treatment instrument is guided into the body cavity through the treatment instrument insertion channel provided in the body cavity.

Note that in the forceps plug 30, as shown in FIG.
Since insertion resistance is experienced at two places, including the insertion hole 32, and the two parts are closely attached without any gaps, it is possible to obtain high airtightness.

Moreover, since the forceps plug 30 is provided with the thin wall portion 35, when the treatment instrument is inserted, the seal portion 34 and the insertion hole 32 are pushed open in the outer circumferential direction using the thin wall portion 35 as a fulcrum, so that the protrusion of the seal portion 34 34a and the insertion resistance of the treatment tool 40 in the insertion hole 32 can be reduced.

[0021] Therefore, it is possible to prevent bodily fluids etc. from gushing out of the body from the treatment instrument insertion portion, which is sanitary, and also to reduce the insertion resistance of the treatment instrument, thereby reducing the burden on the operator of the treatment instrument. FIG. 4 is a longitudinal sectional view of a forceps plug 50 in an endoscope according to a second embodiment of the present invention. Note that the same parts as in FIG. 2 are given the same numbers, and their explanations are omitted.

The forceps plug 50 in the endoscope of this embodiment is as follows:
It communicates with the insertion hole 32 provided in the treatment instrument insertion direction and opens toward the starting end side in the treatment instrument insertion direction, and the minimum opening diameter is larger than the diameter of the treatment instrument and the opening diameter gradually increases toward the starting end side in the treatment instrument insertion direction. An introduction section 51 like this is provided. Further, the introduction portion 51 is formed with a convex curved surface 51a toward the center of the opening.

When a treatment tool is inserted through the forceps plug 50 in an endoscope provided with such a forceps plug 50, the treatment tool 40 is inserted into the seal portion 3 of the forceps plug 50 as shown in FIG.
4 and the insertion hole 32, and the insertion hole 32 is in close contact with the insertion hole 32 without any gaps, so that high airtightness can be achieved.

Furthermore, since the forceps plug 30 is provided with a thin wall portion 35, when a treatment instrument is inserted, the thin wall portion 35 is used as a fulcrum to push open the seal portion 34 in the outer circumferential direction, and a force is applied in the direction of opening the insertion hole 32. Therefore, insertion resistance of the treatment instrument 40 in the insertion hole 32 can be reduced.

Furthermore, by providing the curved surface 51a on the introducing portion 51, the treatment instrument 40 can be moved in the direction perpendicular to the direction of introduction of the treatment instrument (
Even when the seal part 34 is operated in the direction of the arrow in the figure), the curved surface 51a absorbs most of the pressing force applied to the seal part 34, so that the seal part 34 is prevented from being deformed by the pressing force, and the projection part 34a and the treatment tool It is possible to improve the adhesion between the

Therefore, according to the second embodiment, the first
The effect of preventing body fluids etc. from gushing out of the body from the treatment instrument insertion part can be improved more than that of the embodiment described above, and the present invention has the effect of being more hygienic.

Although the endoscope according to the present invention has been described above using embodiments, the present invention is not limited to the above embodiments as long as there is no change in the gist of the claims.

[0028]

[Effects of the Invention] By using the endoscope according to the present invention as described in detail above, while maintaining high airtightness of the insertion part of the treatment instrument when inserting the treatment instrument, it is possible to prevent the forceps from closing when a treatment instrument with a large diameter is inserted. Since the insertion resistance can be prevented from increasing significantly, it is hygienic as it prevents body fluids etc. from gushing out of the body from the treatment instrument insertion part, and the insertion resistance of the treatment instrument is reduced, reducing the burden on the operator. be able to.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the overall configuration of an endoscope according to the present invention.

FIG. 2 is a longitudinal cross-sectional view showing a forceps plug provided in an endoscope according to a first embodiment of the present invention.

FIG. 3 is a longitudinal cross-sectional view showing a case where a treatment instrument is inserted into the forceps plug shown in FIG. 2;

FIG. 4 is a longitudinal sectional view showing a forceps plug provided in an endoscope according to a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a case where a treatment tool is inserted through the forceps plug shown in FIG. 4;

FIG. 6 is a longitudinal sectional view showing a forceps plug provided in a conventional endoscope.

[Explanation of symbols]

10 Endoscope 12　　　　Operation section 14 Insertion part 20 Treatment instrument insertion part 21 Forceps mouth part 30, 50 forceps plug 31, 51 Introduction 51a Curved surface 32 Insertion hole 34 Seal part 34a Protrusion 35 Thin wall part 40 Treatment equipment

Claims (2)

[Claims] Claim 1: An endoscope in which a forceps plug made of an elastic material is provided in a treatment instrument insertion portion of a treatment instrument insertion channel, wherein the forceps plug is connected to a treatment instrument insertion hole provided at a terminal end in the treatment instrument insertion direction. a protrusion provided on the starting end side in the treatment instrument insertion direction from the treatment instrument insertion hole and having a diameter smaller than the diameter of the treatment instrument and protruding toward the center of the opening; A thin wall portion that is thinner in the circumferential direction than the starting end side and becomes a bending portion when the treatment instrument is inserted;
An endoscope comprising: an introduction section that communicates with the treatment instrument insertion hole and opens toward the starting end in the treatment instrument insertion direction. 2. The endoscope according to claim 1, wherein the introduction portion has a curved surface extending in the direction of insertion of the treatment instrument and protruding toward the center of the opening.