JPH03111025A - Forceps plug for endoscope - Google Patents

Abstract

PURPOSE:To suppress the burden given to a first slit to the minimum and to improve the durability by providing a guide hole whose axial length is longer than the inside diameter and which is straight against the channel of a mouthpiece between the first slit of a body part and the second slit of a cap part, and inserting through and guiding a treating implement straightly against the first slit. CONSTITUTION:A guide hole 27 whose axial length L is longer than the inside diameter(d), and also, which is straight against the channel 7 of a mouthpiece 10 is provided on the upper part of a first slit 22 of a body part 12, therefore, for instance, at the time of inserting and detaching a forceps 28, the sheath part 28a of its forceps 28 is controlled straightly against the channel 7 by the guide hole 27. Accordingly, even when the forceps 28 is inserted and drawn out obliquely against a forceps plug 11, the forceps 28 is inserted and detached straightly against the first slit 22, and the burden given to the first slit can be suppressed to the minimum. In such a manner, the durability can be improved without making the forceps plug 11 large in size, and it is safe since it can be prevented that a part thereof is damaged and falls off into the body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a forceps plug for an endoscope that is attached to a mouthpiece for inserting a treatment tool of an endoscope and allows the treatment tool to pass therethrough in an airtight manner.

[Conventional technology]

BACKGROUND ART In medical examinations and surgeries using endoscopes, various procedures are performed, such as injecting medical solutions into a patient's body through an endoscope, and removing and collecting lesions. For this reason, endoscopes are equipped with channels for passing syringes and treatment tools for these treatments, but due to changes in the body cavity pressure, dirt and air in the body cavity may pass through the channels. It may leak outside. For this reason, a forceps plug is attached to the treatment tool insertion mouthpiece that communicates with the channel to prevent dirt and air from leaking.

This forceps plug is made of an elastic material such as rubber, and is provided with a slit for passing the treatment tool. This slit is normally closed airtight and is opened by pressing the treatment tool against it, thereby allowing the treatment tool to be inserted into the channel.

Conventionally, as such a forceps plug, for example, the Utility Model No. 64-2
As shown in Japanese Patent No. 6004, there is a device which is composed of a pair of valve members each having a slit, and a treatment instrument is inserted through these two slits to improve airtightness.

To specifically explain the forceps plug having two slits in this way, as shown in FIG. A cap portion C that is fitted inside the main body portion and a connecting portion d that connects the main body portion and the cap portion C are integrally molded. The central part of the main body part S is recessed downward, and the bottom of the recess e enters into the channel f of the base a, and a first slit g is provided at the bottom. On the other hand, a second slit h is provided in the center of the cap portion C. When inserting the biopsy forceps 1 as a treatment tool, remove the cap C from the main body, insert the forceps i into the recess e of the main body, push open the first slit g, and open the slit. forceps i through g
into channel f of base a. You can also use a syringe (
(not shown), fit the cap C into the main body, pass the tip of the syringe through the second slit h of the cap C, push it into the recess e of the main body, and The slit g of No. 1 is opened to allow the drug solution to be injected into the channel f from the tip of the syringe.

[Problem to be solved by the invention]

However, in the above-mentioned conventional forceps plug, the upper part of the first slit g of the main body part is a space, so when inserting or removing forceps i, for example, the part of the forceps i that protrudes from the first slit g It becomes free in the radial direction, so that the protruding portion of the forceps i is inserted and removed in a bent state, that is, in an inclined state with respect to the first slit g.

Therefore, the forceps i are inserted and removed while being strongly pressed against the thin part including the first slit g. For example, during insertion, the peripheral part of the first slit g is pressed against the inner surface of the mouthpiece a, and the When it is removed, it is pulled and turns up (the state shown by the broken line in Fig. 11). In other words, repeated insertion and removal causes great damage to the first slit g, and this slit g gradually expands and deteriorates early. In addition, stress concentrates on the j part of the main body, and eventually the main body In the worst case scenario, there was a risk that a part of the tube would break and fall into the body. Furthermore, when attaching and detaching the syringe, the tip of the syringe was pressed against the recess e, so repeated attachment and detachment concentrated stress on the j portion, causing breakage.

The present invention was made in view of the above circumstances, and its purpose is to prevent the slit from expanding even when used under harsh conditions such as frequent diagonal insertion and withdrawal of treatment tools and syringes. To provide a forceps plug for an endoscope that is hard to break and has high durability.

[Means and Effects for Solving the Problems] In order to achieve the above object, the present invention provides a first treatment tool inserter that is attached to a treatment tool insertion cap that communicates with a treatment tool insertion channel and that faces the channel. a main body portion having a general slit; a cap portion having a second treatment instrument insertion slit that is removably fitted into the main body portion and facing the first slit; and a cap portion having the first slit in the main body portion. A guide hole is provided between the second slit and the guide hole, the axial length of which is longer than the inner diameter, and which is straight with respect to the channel. Then, the guide hole guides the treatment instrument to be inserted straight into the first slit.

〔Example〕

The first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
This will be explained with reference to the figures.

FIG. 3 shows an endoscope, which is composed of an operating section 1, an insertion section 2 connected to the distal end of the operating section 1, and a universal cord 3 connected to the proximal end of the operating section 1. There is.

The insertion section 2 has a distal end component 6 provided at the distal end of a flexible tube section 4 via a bending section 5, and the bending section 5 can be remotely controlled by an angle knob (not shown) provided on the operating section 1. It is designed to be operated in a curved manner. Furthermore, in addition to an observation optical system and an illumination optical system (none of which are shown), a treatment instrument insertion channel 7 is inserted into the insertion section 2, and one end of this channel 7 is opened to the outside in the distal end component 6. are doing. on the other hand,
The other end of the channel 7 first branches at the distal end of the operating section 1, one of which communicates with the treatment instrument insertion port 8, and the other end leading to the proximal end of the operating section 1, where it branches again. . One of them is connected to the suction control button 9, and the other is connected to a suction pump (not shown) through the universal cord 3.

As shown in FIG. 1, the treatment instrument insertion port 8 is composed of a hard treatment instrument insertion mouthpiece 10 and a forceps plug 11 attached to this mouthpiece 10 to prevent dirt and air from leaking. . This forceps plug 11 is made of an elastic material such as silicone rubber, fluorine rubber, or nitrile butyl rubber, and includes a main body part 12 that is externally fitted and fixed to the base end of the mouthpiece 10, and a cap that is detachably externally fitted onto the upper part of this main body part 12. section 13 and these main body sections 12
and a connecting portion 14 that connects the cap portion 13 and the cap portion 13 are integrally molded. The main body portion 12 has a convex cylindrical shape with a small diameter at the top and a large diameter at the bottom, and a first fitting recess 16 having approximately the same external shape as the base end of the cap 10 is formed in the large diameter portion 15. A first outer flange 18 that engages with a first inner flange 17 of the base 10 is protruded from the lower part of the four parts 16.

Further, a second inner flange 20 is provided protruding from the upper end of the small diameter portion 19. At the center of the inner surface of the large-diameter portion 15, a thin first partition membrane 21 having a substantially hemispherical shape that enters the channel 7 of the base 10 is provided. A Y-shaped first treatment instrument insertion slit 22 is formed. This slit 22 is normally closed by the elastic force of the first partition membrane 21.

Further, the first partition membrane 21 is in close contact with the inner surface of the mouthpiece 10 and seals between the mouthpiece 10 and the forceps plug 11.

On the other hand, the cap part 13 has a cylindrical shape, and a second fitting recess 23 having approximately the same external shape as the small diameter part 19 of the main body part 12 is formed inside the cap part 13 . A second outer flange 24 is protruded to engage with a second inner flange 20 of the flange. Further, a second partition film 25 is provided at the center of the upper surface of the cap part 13 to face the first slit 22 of the main body part 12. A Y-shaped second treatment tool insertion slit 26 is formed. This slit 26 is also normally closed by the elastic force of the second partition membrane 25.

In the main body part 12, one end is connected to the second end of the cap part 13.
is opened on the upper surface of the small diameter portion 19 facing the slit 26 of
A guide hole 27 whose other end communicates with the first slit 22 is formed. Here, the inner diameter d of the guide hole 27 is formed to be approximately the same diameter as the sheath part 28a of the biopsy forceps 28 as a treatment tool, and the axial length is longer than the inner diameter d, and the channel 7 of the cap 10 It is formed straight against the Therefore, the first slit 22 and the guide hole 27
, the second slit 26 and the channel 7 are formed in a straight line.

In such a configuration, for example, when inserting the biopsy forceps 28, the cap portion 13 may be fitted into the main body portion 12, but normally the cap portion 13 is inserted into the main body portion 12 as shown in FIG.
is removed, the forceps 28 are inserted into the guide hole 27 of the main body part 12, the first slit 22 of the first partition membrane 21 is pushed open, and the forceps 28 is inserted into the channel 7 of the cap 10 through this slit 22. .

In addition, when injecting a medicinal solution with a syringe (not shown), the cap part 13 is fitted into the main body part 12, and the tip of the syringe is pushed into the second partition membrane 25 of the cap part 13 to push the second slit 26. The tip of the syringe is opened and pressed against the upper surface of the main body 12 through this slit 26, or the tip of the syringe is inserted into the upper part of the guide hole 27, and the drug solution is injected from the tip of the syringe into the channel 7 through the guide hole 27 and the first slit 22. do.

In this way, since the guide hole 27 is provided in the upper part of the first slit 22 of the main body part 12, the axial length is longer than the inner diameter d, and the guide hole 27 is straight with respect to the channel 7 of the cap 10.
For example, when inserting and removing the forceps 28, the sheath portion 28a of the forceps 28 is regulated straight with respect to the channel 7 by the guide hole 27. Therefore, the forceps 28 are connected to the forceps stopper 1.
Even if the forceps 28 are inserted and removed obliquely from the first slit 22, the forceps 28 are inserted and removed straight from the first slit 22, and the load on the first slit 22 can be minimized. As a result, durability can be improved without particularly increasing the size of the forceps plug 11, and a part of the forceps plug 11 can be prevented from breaking and falling into the body, which is safe. Moreover, when attaching and detaching the syringe, the tip of the syringe does not reach the first partition membrane 21, which prevents the syringe from damaging the first partition membrane 21. Furthermore, the guide hole 27 allows the forceps 28 to be inserted and guided straight through the second slit 26 to a certain extent.
Expansion, damage, etc. can also be prevented.

FIG. 4 shows a second embodiment of the invention.

In this embodiment, the guide hole 27a is provided not from the upper end of the main body part 12 to the first partition membrane 21, but only in a certain part of the upper side, and the other part has an inner diameter larger than the inner diameter d of the guide hole 77a. A relief portion 31 is provided. The other basic configuration and operation are the same as those of the first embodiment, but in addition to the effects of the first embodiment, the contact area between the forceps 28 and the main body 12 is reduced, and the forceps 28
Requires less force when inserting and removing.

FIG. 5 shows a third embodiment of the invention.

In this embodiment, a guide frame 35 made of an inelastic material such as plastic or metal is provided on the inner circumference of the guide hole 27b, and other basic configurations and functions are the same as those of the first embodiment. In addition to the effects of the first embodiment, tilting of the forceps 28 can be more reliably prevented.

6 and 7 show a fourth embodiment of the invention.

In this embodiment, at least one, in this case three, guide protrusions 41 are provided on the inner wall surface of the guide hole 27c, protruding along the axial direction and at equal intervals in the radial direction. However, in this case, the minimum diameter d' of the guide hole 27c is formed to be approximately the same diameter as the sheath portion 28a of the forceps 28. Other basic configurations and functions are the same as those of the first embodiment, and the effects are the same as those of the second embodiment.
It is the same as the embodiment (insertion/removal force amount reduced).

FIG. 8 shows a fifth embodiment of the invention.

In this embodiment, the guide hole 27d is an oval hole that is long in the radial direction. In this case, the second slit 26 of the cap portion 13 is oriented by one character in a direction offset by 45 to 90 inches from the length direction of the guide hole 27d. The incisions are formed in a shape, a cross shape, or a Y shape.The other basic structure and operation are the same as in the first embodiment, and the effects are the same as in the second embodiment.

FIG. 9 shows a sixth embodiment of the invention.

In this embodiment, the inner wall surface of the guide hole 27e is formed into a wave shape. However, in this case, the minimum diameter d' of the guide hole 27e is formed to be approximately the same diameter as the sheath portion 28a of the forceps 28. Other basic configurations and operations are similar to those of the first embodiment, and effects are similar to those of the second embodiment.

Note that the present invention is not limited to each of the above embodiments, and for example, the first embodiment
The present invention may be applied to the electronic endoscope shown in FIG.

This electronic endoscope consists of an operating section 45, an insertion section 46 connected to the distal end of the operating section 45, and a universal cord 47 connected to the proximal end of the operating section 45. A connector 48 is provided at the tip of the universal cord 47, and this connector 48 is connected to a video processor 49. Further, a TV monitor 50 is connected to this video processor 49. Further, the operating section 45 is provided with an angle knob 51, an air/water supply switching button 52, a suction button 53, an inductor operating lever 54, and a treatment instrument insertion port 55. The other basic configuration is the same as that of the fiberscope shown in FIG. 3, and the explanation will be omitted.

〔Effect of the invention〕

As described above, according to the present invention, the axial length is longer than the inner diameter between the first slit of the main body and the second slit of the cap, and the guide is straight with respect to the channel of the cap. Since a hole is provided and the treatment instrument is inserted and guided straight through the first slit using the guide hole, for example, even if the treatment instrument is inserted and removed diagonally from the forceps plug, the treatment instrument will not be inserted into the first slit. It is inserted into and removed from the first slit straightly, and the load on the first slit can be minimized. Therefore, the durability can be improved without particularly increasing the size of the forceps plug, and it is possible to prevent a part of the forceps from breaking and falling into the body, which is safe. Furthermore, when the syringe is attached or detached, the tip of the syringe does not reach the first slit, which prevents the syringe from damaging the first slit. Furthermore, the guide hole allows the treatment tool to be inserted and guided straight through the second slit to some extent, and expansion and breakage of the second slit can be prevented.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a sectional view of the forceps plug, FIG. 2 is a usage state diagram, FIG. 3 is a side view of the endoscope, and FIG. The figure is a sectional view of a forceps plug showing a second embodiment of the present invention, FIG. 5 is a sectional view of a forceps plug showing a third embodiment of the invention, and FIGS. 4 is shown, FIG. 6 is a sectional view of the forceps plug, and FIG. 7 is a sectional view of the forceps plug.
8 is a sectional view of a forceps plug showing a fifth embodiment of the present invention, and FIG. 9 is a sectional view of a forceps plug showing a sixth embodiment of the present invention. , FIG. 10 is a configuration diagram of an endoscope and its peripheral equipment showing a modified example, and FIG. 11 is a usage state diagram of a conventional example of a forceps plug. 7... Channel for insertion of treatment instrument, 10... Mouthpiece for insertion of treatment instrument, 12... Main body part, 13... Cap part,
22...Slit for first treatment instrument insertion, 26...Slit for second treatment instrument insertion, 27...Guide ox.

Claims (1)

[Claims] a main body portion having a first treatment tool insertion slit attached to a treatment tool insertion mouthpiece communicating with the treatment tool insertion channel and facing the channel; a cap portion having a second treatment instrument insertion slit facing the slit; and a cap portion provided in the main body portion between the first slit and the second slit, the axial length being longer than the inner diameter. A forceps plug for an endoscope, further comprising a guide hole that is straight with respect to the channel.