JP6747800B2 - Treatment tool insertion tool - Google Patents

Description

The present invention relates to a treatment instrument insertion tool that is attached to an insertion device that is inserted into a subject and that inserts a treatment instrument that treats the subject into the subject.

In recent years, an insertion device to be inserted into a subject, such as an endoscope, has been widely used in the medical field.

An endoscope used in the medical field observes an organ in a body cavity by inserting an elongated insertion portion into a body cavity as a subject, and a treatment instrument insertion passage provided in the endoscope as necessary. By using the inserted treatment tool, various treatments can be performed on a target portion of an organ in a body cavity (hereinafter, referred to as a treatment target portion).

When observing the inside of the body cavity, the operator grasps the insertion part of the endoscope with the right hand to perform various operations of the insertion part while observing the endoscopic image, and the endoscopy with the left hand. A general procedure is to perform various operations on the operation section of the mirror.

In addition, when performing a treatment on a treatment target site in a body cavity, the operator temporarily separates the right hand from the insertion section, then grasps the treatment tool with the right hand and inserts the treatment tool insertion passage provided in the operation section. A general procedure is to insert a treatment instrument into the treatment instrument insertion passage through the mouth, and project the treatment instrument into the subject through the tip opening of the treatment instrument insertion passage formed at the tip of the insertion portion to perform various treatments. Is.

Here, when performing various treatments on a treatment target portion in a body cavity using a treatment tool, an operator inserts the treatment target portion while observing an endoscopic image in order to perform an appropriate treatment. It is necessary to finely adjust the tip position of the part and the tip position of the treatment tool.

However, as described above, since the operator selectively performs various operations of the insertion portion and various operations of the treatment tool with the right hand, the operator slightly adjusts the tip position of the insertion section and the tip position of the treatment tool with respect to the treatment target site. There was a problem that it was difficult to make adjustments at the same time.

In addition, as described above, since the operator has to perform various operations of the treatment instrument performed with the right hand by separating the right hand from the insertion portion, it is said that the operator finely adjusts the tip position of the treatment instrument with respect to the treatment target site. There is also a problem that the position of the tip of the insertion part is displaced with respect to the treatment target site.

In view of such a problem, in Patent Document 1, a tubular treatment instrument guide portion having one end detachable from an insertion opening of a treatment instrument insertion passage provided in the operation portion, and the other end of the treatment instrument guide portion A treatment instrument insertion tool for inserting a treatment instrument into a subject is provided, which includes a guide portion main body that is provided and is detachably attached to a portion of the insertion portion located outside the subject.

In the treatment instrument insertion tool disclosed in Patent Document 1, the guide portion main body is attached to a portion of the insertion portion located outside the subject, and one end of the treatment instrument guide portion is attached to the insertion opening of the treatment instrument insertion passage. In this state, the treatment instrument is inserted into the treatment instrument insertion passage through the guide portion main body and the treatment instrument guide portion, and in a state where the treatment instrument is projected from the tip opening of the tip of the insertion portion into the subject, the operator inserts the insertion portion with the right hand. Since the position of the treatment tool can be adjusted using the treatment tool operating part such as a slider fixed to the guide body with the right hand while holding the hand, the distal end position of the insertion part with respect to the treatment target site and the treatment tool can be adjusted with only the right hand. Fine adjustment of the tip position of can be performed at the same time.

International application publication WO 2013/065509

By the way, when a treatment target part is treated using the treatment tool insertion tool disclosed in Patent Document 1, a plurality of treatment tools are selectively inserted into and removed from the treatment tool insertion passage and the treatment tool insertion tool. In some cases, one treatment tool may be inserted and removed multiple times. That is, a replacement operation of the treatment tool may occur.

However, in the treatment instrument insertion tool disclosed in Patent Document 1, since the treatment instrument operation portion fixed to the guide body is fixed to the treatment instrument with a ratchet or a chuck, a plurality of treatments are performed. When selectively inserting/removing the treatment tool or when inserting/removing one treatment tool, there is a problem that a work of attaching/detaching the treatment tool operation part to/from the treatment tool is separately required, and the replacement work of the treatment tool is complicated. ..

The present invention has been made in view of the above problems, and an object of the present invention is to provide a treatment instrument insertion tool having a configuration that allows easy replacement of the treatment instrument.

In order to achieve the above object, a treatment tool insertion tool according to an aspect of the present invention is attached to an insertion device inserted into a subject, and inserts a treatment tool for treating the subject into the subject. A treatment tool guide part for guiding the treatment tool into the subject, and an insertion part of the insertion device held by one hand of an operator is inserted into the subject. A guide unit main body which is detachable to a portion of the insertion unit outside the subject and is provided on one end side of the treatment instrument guide unit and serves as an insertion opening of the treatment instrument into the treatment instrument guide unit, A treatment tool operating part that is attached to the treatment tool and is detachable from the guide portion main body, and that is operated by the one hand of the operator after mounting . first engagement portion is provided on the outer surface, the guide body, the first engagement portion is characterized that you have the second engaging portion is provided freely fitted.

According to the present invention, it is possible to provide a treatment instrument insertion instrument having a configuration capable of easily exchanging treatment instruments.

The figure which shows the treatment tool penetration tool of 1st Embodiment with an endoscope. The figure which shows the one part cross section of the treatment tool penetration tool of FIG. 1 with a part of treatment tool to which the treatment tool operation part was attached. FIG. 2 is a partial cross-sectional view showing a modification example in which a film is provided between the treatment instrument guide portion and the guide portion main body in the treatment instrument insertion portion of FIG. The figure which shows a part of treatment implement insertion tool of 2nd Embodiment with a part of treatment implement to which the treatment implement operation part was attached. The side view which looked at a part of treatment implement insertion tool in FIG. 4 from the V direction in FIG. The figure which shows the modification of the shape of the protrusion of FIG. 4 with a treatment tool operation part. The figure which shows the one part cross section of the treatment tool insertion tool of 3rd Embodiment with some treatment tools with which the treatment tool operation part was attached. The figure which shows a part of treatment implement insertion tool of 4th Embodiment with a part of treatment implement to which the treatment implement operation part was attached. A modified example in which the second engaging portion in FIG. 8 is composed of a slit and a plurality of convex portions formed in the slit is a modification of the treatment instrument to which a part of the treatment instrument insertion instrument and the treatment instrument operation section are attached. Diagram with part A modified example in which the second engaging portion of FIG. 8 is composed of a slit and one convex portion formed in the slit is a modification of the treatment instrument to which a part of the treatment instrument insertion instrument and the treatment instrument operation unit are attached. Diagram with part The figure which shows the modification of the shape of the slit of FIG. 8 with some treatment implement insertion tools. The figure which shows the modification of the shape of the protrusion of the slider which can be fitted in the slit of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments described below, the insertion device will be described by taking an endoscope as an example.

(First embodiment)
FIG. 1 is a view showing the treatment instrument insertion tool of the present embodiment together with an endoscope, and FIG. 2 shows a partial cross section of the treatment instrument insertion instrument of FIG. 3 and FIG. 3 are partial cross-sectional views showing a modified example in which a film is provided between the treatment instrument guide portion and the guide portion main body in the treatment instrument insertion portion of FIG. 2.

As shown in FIG. 1, an endoscope 1 as an insertion device includes an insertion portion 2 to be inserted into a subject, an operation portion 3 continuously provided on the proximal end side of the insertion portion 2, and the operation portion. The main part is configured by including the universal cord 8 extended from the connector 3 and the connector 9 provided at the extension end of the universal cord 8. The endoscope 1 is electrically connected to an external device such as a control device and a lighting device via the connector 9.

The operation portion 3 is provided with an up/down bending operation knob 4 for bending the bending portion 2w of the insertion portion 2 in the up/down direction, and a left/right bending operation knob 6 for bending the bending portion 2w in the left/right direction.

Further, the operation portion 3 is provided with a fixed lever 5 for fixing the turning position of the up/down bending operation knob 4 and a fixing knob 7 for fixing the turning position of the left/right bending operation knob 6. Further, the operation unit 3 is provided with various known operation switches and the like.

The various knobs 4, 6, 7, the lever 5, the various switches, and the like provided on the operation unit 3 are operated by, for example, the left hand of the operator.

The insertion portion 2 is configured to have a distal end portion 2s, a bending portion 2w, and a flexible tube portion 2k in this order from the distal end side, and is formed in an elongated shape. The insertion portion 2 is operated, for example, by the operator's right hand.

Note that, contrary to the above, various operations of the insertion portion 2 may be performed by the operator's left hand and various operations of the operation portion 3 may be performed by the operator's right hand.

The bending portion 2w is bent in, for example, four directions of up, down, left, and right by the turning operation of the up/down bending operation knob 4 and the left/right bending operation knob 6, so that the bending portion 2w of an imaging unit (not shown) provided in the front end portion 2s is rotated. The observation direction is changed, and the insertability of the distal end portion 2s in the subject is improved. Further, the flexible tube portion 2k is continuously provided on the base end side of the bending portion 2w.

A treatment instrument insertion passage 10 is provided in the insertion portion 2 and the operation portion 3. One end of the treatment instrument insertion passage 10 is opened as a tip opening 10a on the tip surface of the tip portion 2s, and the other end is opened as an insertion port 10b in the operation portion 3.

Since the other configurations of the endoscope 1 are the same as those of a general endoscope, detailed description thereof will be omitted.

The treatment instrument insertion tool 20 is attached to the endoscope 1 and inserts one of the treatment instruments 31 to 34 for treating the inside of the subject into the subject.

In the present embodiment, the case where the number of treatment tools is four is shown as an example, but the number of treatment tools may be one or a plurality of treatment tools other than four.

The treatment instrument insertion tool 20 includes a tube 21 which is a treatment instrument guide portion, a guide portion main body 22, and one of the sliders 41 to 44 which is a treatment instrument operation portion, and constitutes a main portion.

The tube 21 guides one of the treatment tools 31 to 34 into the subject and is made of, for example, a resin such as Teflon (registered trademark).

Specifically, the tube 21 is connectable at its other end to the insertion port 10b of the treatment instrument insertion passage 10 provided in the endoscope 1, and after connection, is inserted into the tube 21 from the guide body 22. Any one of the treatment tools 31 to 34 is projected into the subject through the treatment instrument insertion passage 10 from the distal end opening 10a and guided into the subject.

As shown in FIGS. 1 to 3, the guide portion main body 22 is provided on one end side of the tube 21, the treatment tools 31 to 34 pass inside, and one of the sliders 41 to 44 is mounted. There is a space 22i that communicates with the space 21i inside the tube 21, and the proximal end of the space 22i constitutes the insertion port 22p of any of the treatment tools 31 to 34 into the space 21i.

Note that, as shown in FIG. 3, even if a membrane 50 having a hole 50h through which any of the treatment tools 31 to 34 passes is provided at the boundary between the space 21i of the tube 21 and the space 22i of the guide portion main body 22. Good.

The membrane 50 attempts to discharge the liquid in the subject toward the outside of the body due to the pressure inside the subject being higher than atmospheric pressure in a state where any of the treatment tools 31 to 34 is passed through the hole 50h. Accordingly, it is possible to prevent the liquid from moving from the space 21i to the space 22i via the treatment instrument insertion passage 10.

According to this, as will be described later, while any of the sliders 41 to 44 provided on the treatment tools 31 to 34 is operated to finely adjust the tip end positions of the treatment tools 31 to 34, the treatment is performed. The membrane 50 can prevent the liquid in the subject from leaking out of the body through the insertion port 20p when the tool is replaced.

Therefore, the diameter of the hole 50h needs to be smaller than the outer diameter of any one of the treatment tools 31 to 34. As a result, the film 50 is in close contact with the outer peripheral surface of any of the treatment tools 31 to 34 and maintains liquid tightness. That is, the film 50 functions as a liquid tight member.

Further, as shown in FIG. 1, the guide portion main body 22 is located outside the subject in the flexible tube portion 2k of the insertion portion 2 when the insertion portion 2 is inserted into the subject, for example, by a chain line. It is detachable from the enclosed part 2z. The guide portion main body 22 is configured so as not to be displaced from the portion 2z after being attached to the portion 2z located outside the subject.

Further, as shown in FIG. 2, the guide portion main body 22 is formed with a slit 22s which is a second engaging portion communicating with the insertion port 22p and the space 22i. The slit 22s is formed in the guide portion main body 22 along the longitudinal direction N in which the tube 21 guides one of the treatment tools 31 to 34.

As shown in FIG. 1, the sliders 41 to 44 are attached in advance to the treatment tools 31 to 34, respectively, and are attachable to and detachable from the space 22i of the guide portion main body 22.

The sliders 41 to 44 may be detachable from the treatment tools 31 to 34, respectively. The structure of the sliders 41 to 44 will be described below by taking the slider 41 as an example. Further, the treatment tools 31 to 34 will be described by taking the treatment tool 31 as an example. Therefore, the structure of the slider 41 is also applied to the structures of the sliders 42 to 44, and the structure of the treatment tool 31 is also applied to the treatment tools 32 to 34.

Specifically, as shown in FIG. 2, the slider 41 is provided with a protrusion 41t, which is a first engaging portion, on the outer surface 41g, and the protrusion 41t can be fitted into the slit 22s, so that the treatment tool is provided. It is attachable to and detachable from the space 22i of the guide portion main body 22 in a state of being attached to the guide member 31 in advance.

When the slider 41 is attached to the guide portion main body 22, the treatment tool 31 is inserted into the space 21i and the space 22i, the slider 41 is inserted into the space 22i, and the protrusion 41t is fitted into the slit 22s. Further, in this state, as shown in FIG. 1, the distal end 31s of the treatment tool 31 is projected into the subject through the distal end opening 10a.

In this state, the operator moves the projection 41t back and forth in the slit 22s with the right hand along the longitudinal direction N while observing the endoscopic image while holding the insertion portion 2 with the right hand. The position of the distal end side of the treatment tool 31 protruding into the subject can be finely adjusted. Further, at the same time, the operator can finely adjust the position of the tip of the tip 2s of the insertion section 2 with the right hand while observing the endoscopic image.

Incidentally, sliders 41 to 44 attached to the plurality of treatment tools 31 to 34 are selectively attachable to and detachable from the guide portion main body 22.

That is, the projections 41t to 44t provided on the sliders 41 to 44 can be selectively fitted into the slits 22s.

Note that the configuration of the other treatment instrument insertion tool 20 is the same as that of the conventional one, and thus the description thereof is omitted.

As described above, in the present embodiment, the sliders 41 to 44 are shown to be attached to the treatment tools 31 to 34 in advance.

Further, the sliders 41 to 44 can be attached to and detached from the guide portion main body 22, respectively, as one of the treatment tools 31 to 34 is inserted into and removed from the space 21i and the space 22i, and the protrusions 41t to 44t are , And each of the slits 22s is shown to be fittable.

Further, while holding the insertion portion 2 with the right hand, that is, in a state where the tip position of the tip portion 2s of the insertion portion 2 can be finely adjusted or the tip position is fixed, one of the protrusions 41t to 44t is slit 22s. It has been shown that the tip position of any one of the treatment tools 31 to 34 can be finely adjusted by operating the back and forth with the right hand along the longitudinal direction N.

According to this, in the treatment instrument insertion instrument 20 having a configuration in which the distal end positions of the treatment instruments 31 to 34 can be finely adjusted with the right hand while holding the insertion portion 2 with the right hand, the space 21i and the space 22i, the treatment instrument insertion portion. When replacing the treatment tool inserted in the passage 10, the sliders 41 to 44 are fixed to the treatment tools 31 to 34 in advance, and the sliders 41 to 44 are detachable from the guide portion main body 22. Therefore, unlike the conventional method, it is not necessary to fix or remove the slider with respect to the treatment tool with a ratchet or a chuck each time the treatment tool is replaced or inserted/removed. It can be done easily.

From the above, it is possible to provide the treatment instrument insertion instrument 20 having a configuration capable of easily exchanging the treatment instrument.

(Second embodiment)
FIG. 4 is a view showing a part of the treatment instrument insertion tool of the present embodiment together with a part of the treatment instrument having the treatment instrument operation portion attached thereto, and FIG. 5 is a part of the treatment instrument insertion tool in FIG. 4. FIG. 5 is a side view seen from the V direction in FIG. 4.

The configuration of the treatment instrument insertion tool of the second embodiment has a shape of the slit formed in the guide body as compared with the treatment instrument insertion instrument of the first embodiment shown in FIGS. 1 to 3 described above. Is different.

Therefore, only this difference will be described, the same configurations as those in the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 4 and 5, in the present embodiment, the slits 22s are the first slits 22s1 and 22s3 extending along the longitudinal direction N, and the slit 22s continuous with the first slits 22s1 in the longitudinal direction. A main part is configured by including a second slit 22s2 having an angle with respect to N.

The width N1 of the second slit 22s2 in the longitudinal direction N is set to be larger than the width N2 of the protrusion 41t in the longitudinal direction N (N2<N1).

The configuration of the other treatment tool insertion tool 20 is the same as that of the first embodiment described above. Also in the present embodiment, the structure of the sliders 41 to 44 will be described taking the slider 41 as an example, and the structure of the treatment tools 31 to 34 will be described using the treatment tool 31 as an example. Therefore, the structure of the slider 41 is also applied to the structures of the sliders 42 to 44, and the structure of the treatment tool 31 is also applied to the structure of the treatment tools 32-34.

In such a configuration, when the protrusion 41t of the slider 41 is fitted into the slit 22s, the operator first inserts the slider 41 into the space 22i, and first inserts the slider 41 from the rear side in the longitudinal direction N of the guide portion main body 22. The protrusion 41t is fitted into the slit 22s3 to move forward in the longitudinal direction N, and then the slider 41 is rotated to move the protrusion 41t inside the second slit 22s2 so that the protrusion 41t is fitted into the first slit 22s1. ..

In this state, the protrusion 41t is moved back and forth in the longitudinal direction N in the first slit 21s1 between the distal end 22s1a and the proximal end 22s1b of the first slit 21s1 to finely adjust the distal end position of the treatment instrument 31. I do. When removing the projection 41t from the slit 22s, the operator performs an operation opposite to the above.

Therefore, in the above-described first embodiment, since the slit 22s communicates with the insertion port 22p, there is a possibility that the protrusion 41t may come out of the slit 22s by the rearward movement operation of the protrusion 41t in the longitudinal direction N. there were. On the other hand, in the present embodiment, since the slit 22s has the second slit 22s2, it is unintentionally accompanied by the operation of moving the protrusion 41t in the first slit 22s1 along the longitudinal direction N. It is possible to reliably prevent the protrusion 41t from coming off from the first slit 22s1.

The other effects are the same as those of the first embodiment described above.

A modified example will be described below with reference to FIG. FIG. 6 is a diagram showing a modified example of the shape of the protrusion of FIG. 4 together with a treatment tool operating unit.

In the above-described present embodiment, the width N1 of the slit 22s in the longitudinal direction N is set to be larger than the width N2 of the protrusion 41t in the longitudinal direction N. That is, the width N2 of the protrusion 41t is set to be smaller than the width N1 of the slit 22s.

Not limited to this, as shown in FIG. 6, the protrusion 41t is composed of a shaft 41tb and an abutting portion 41ta provided on the upper end of the shaft 41tb, and only the shaft 41tb can move through the slit 22s in the longitudinal direction. Of course, the width N3 of N may be set smaller than the width N1 of the slit 22s (N3<N1).

(Third Embodiment)
FIG. 7: is a figure which shows the one part cross section of the treatment tool insertion tool of this Embodiment with a part of treatment tool to which the treatment tool operation part was attached.

The configuration of the treatment tool insertion tool of the third embodiment is the same as that of the treatment tool insertion tool of the first embodiment shown in FIGS. 1 to 3 and the second embodiment shown in FIGS. 4 and 5. Compared with the treatment instrument insertion tool, the shape of the slit formed in the guide portion main body and at least a part of the protrusion are elastically deformed.

Therefore, only this difference will be described, the same configurations as those in the first and second embodiments will be denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 7, in the present embodiment, the slit 22s is formed in a hole shape along the longitudinal direction N so as to have a tip end 22sa and a base end 22sb.

Further, the projection 41t of the slider 41 is configured to be fitted into the slit 22s by elastically deforming at least a part thereof.

The other configurations of the treatment instrument insertion instrument 20 are the same as those of the above-described first and second embodiments. Also in the present embodiment, the structure of the sliders 41 to 44 will be described taking the slider 41 as an example, and the structure of the treatment tools 31 to 34 will be described using the treatment tool 31 as an example. Therefore, the structure of the slider 41 is also applied to the structures of the sliders 42 to 44, and the structure of the treatment tool 31 is also applied to the treatment tools 32 to 34.

In such a configuration, when fitting the protrusion 41t of the slider 41 into the slit 22s, the operator first inserts the slider 44 into the space 22i of the guide body 22 from the rear side in the longitudinal direction N of the guide body 22. , Through the insertion port 22p. At this time, the slider 41 is moved forward while the protrusion 41t is elastically deformed and compressed in the direction of the treatment tool 31, and then the protrusion 41t is fitted into the slit 22s. At this time, the projection 41t is released from the state in which it is compressed by the slit 22s and returns to the original state.

In the state where the protrusion 41t is fitted in the slit 22s, the protrusion 41t is moved back and forth in the longitudinal direction N between the tip 22sa and the base end 22sb of the slit 22s in the slit 22s. Fine-tune. When removing the projection 41t from the slit 22s, the operator performs an operation opposite to the above.

Even with such a configuration, it is possible to reliably prevent the protrusion 41t from being unintentionally pulled out from the slit 22s due to the operation of moving the protrusion 41t in the slit 22s.

The other effects are the same as those of the first and second embodiments described above.

(Fourth Embodiment)
FIG. 8: is a figure which shows a part of treatment tool penetration tool of this Embodiment, and a part of treatment tool with which the treatment tool operation part was attached.

The configuration of the treatment tool insertion tool of the fourth embodiment is the same as that of the treatment tool insertion tool of the first embodiment shown in FIGS. 1 to 3 and the second embodiment shown in FIGS. 4 and 5. Compared with the treatment instrument insertion tool and the treatment instrument insertion tool of the third embodiment shown in FIG. 7, the shape of the slit formed in the guide portion main body and the shape of the protrusion provided on the slider are different.

Therefore, only this difference will be described, the same configurations as those in the first to third embodiments will be denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 8, in the present embodiment, the second engaging portion includes a slit 22s extending in the longitudinal direction N and a plurality of slits 22s formed in the slit 22s in the longitudinal direction N. It is composed of a groove 22m.

Further, the protrusion 41t provided on the slider 41 has a convex portion 41td that can be fitted into the slit 22s and can be engaged with and disengaged from any one groove 22m.

The configuration of the other treatment instrument insertion tool 20 is the same as that of the above-described first to third embodiments. Also in the present embodiment, the structure of the sliders 41 to 44 will be described taking the slider 41 as an example, and the structure of the treatment tools 31 to 34 will be described using the treatment tool 31 as an example. Therefore, the structure of the slider 41 is also applied to the structures of the sliders 42 to 44, and the structure of the treatment tool 31 is also applied to the structure of the treatment tools 32-34.

According to such a configuration, when the protrusion 41t is fitted in the slit 22s, the position of the distal end of the treatment tool 31 is predetermined, for example, by locking the protrusion 41td in any one of the grooves 22m. The pitch can be adjusted easily. That is, the amount of advance/retreat of the treatment instrument 31 can be quantitatively controlled.

The other effects are the same as those of the above-described first to third embodiments.

Further, in the present embodiment, it is shown that the distal end of the treatment tool 31 is positioned by engaging and disengaging the convex portion 41td with respect to any of the plurality of grooves 22m, but the present invention is not limited to this, and the space of the guide portion main body 22 is not limited to this. Even in a configuration in which a plurality of grooves along the longitudinal direction N are provided on the inner peripheral surface facing the surface 22i, and the convex portion provided on the outer surface 41g of the slider 41 is engageable and disengageable in any of the grooves. The same effect as that of the embodiment can be obtained.

Furthermore, the effect similar to that of the above-described present embodiment can be obtained not only by engaging and disengaging the groove and the convex portion but also by using a known ratchet mechanism.

Further, the configuration of attaching/detaching the slider 41 to/from the guide portion main body 22 is not limited to the configurations of the above-described second to fourth embodiments, and the configurations shown in FIGS.

9 to 12, the sliders 41 to 44 will be described by taking the slider 41 as an example, and the treatment tools 31 to 34 will be described by taking the treatment tool 31 as an example. .. Therefore, the structure of the slider 41 is also applied to the structures of the sliders 42 to 44, and the structure of the treatment tool 31 is also applied to the structure of the treatment tools 32-34.

FIG. 9 shows a modification in which the second engaging portion of FIG. 8 is composed of a slit and a plurality of convex portions formed in the slit, and a part of the treatment instrument insertion instrument and the treatment instrument operation unit are attached. It is a figure shown with some treatment tools.

As shown in FIG. 9, the second engagement portion provided in the guide portion main body 22 includes slits 22s extending in the longitudinal direction N and a plurality of slits 22s formed in the slits 22s in the longitudinal direction N. It may be configured with the convex portion 22t.

With such a configuration, when the protrusion 41t is fitted into the slit 22s, each time the protrusion 41td provided on the protrusion 41t of the slider 41 crosses over any one protrusion 22t, the distal end of the treatment instrument 31 is removed. Can be easily positioned. That is, the amount of advance/retreat of the treatment instrument 31 can be quantitatively controlled.

FIG. 10 shows a modified example in which the second engagement portion of FIG. 8 is composed of a slit and one convex portion formed in the slit, and a part of the treatment instrument insertion instrument and the treatment instrument operation unit are attached. It is a figure shown with some treatment tools.

As shown in FIG. 10, the second engaging portion provided in the guide portion main body 22 is composed of a slit 22s extending along the longitudinal direction N and one convex portion 22d formed in the slit 22s. It doesn't matter. Further, in FIG. 10, the protrusion 41d is provided on the slider 41 itself.

With such a configuration, when the projection 41t is fitted into the slit 22s and the convex portion 41d passes over the convex portion 22d, the slider 44 can be easily attached to and fixed to the guide portion main body 22. ..

11 is a view showing a modification of the shape of the slit of FIG. 8 together with a part of the treatment instrument insertion tool, and FIG. 12 is a view showing a modification of the shape of the protrusion of the slider that can be fitted in the slit of FIG. is there.

As shown in FIG. 11, the slit 22s formed in the guide portion main body 22 is continuous with the large-diameter slit 22sf and the base end of the slit 22sf, and has a small diameter formed up to the base end of the guide portion main body 22. It may be configured with the slit 22sg.

Further, as shown in FIG. 12, the protrusion 41t that can be fitted into the slit 22s is configured to be expandable and contractable from a small-diameter shaft 41td and a large-diameter shaft 41te continuous with the upper end of the small-diameter shaft 41td. I do not care.

With this configuration, when the slider 41 is attached to the guide portion main body 22, the protrusion 41t is lifted from the rear of the guide portion main body 22 with respect to the small-diameter slit 22sg to pass through the small-diameter shaft 41td. After the small-diameter shaft 41td is fitted into the large-diameter slit 22sf, if the projection 41t is pushed down, the large-diameter shaft 41te and the small-diameter shaft 41te and the small-diameter shaft are inserted between the distal end 22sf1 and the base end 22sf2 of the large-diameter slit 22sa. 41td can move back and forth.

Even with such a configuration, it is possible to prevent the projection 41t from unintentionally coming off from the slit 22s due to the movement operation of the large-diameter shaft 41te and the small-diameter shaft 41td in the large-diameter slit 22sf along the longitudinal direction N. It can be surely prevented.

In addition, in the above-mentioned 1st-4th embodiment, although the insertion device showed the endoscope 1 as an example, it is not restricted to this and insertion provided with the treatment tool insertion path other than an endoscope. It goes without saying that it can also be applied to equipment.

Further, in the above-described first to fourth embodiments, the other end of the tube 21 is shown to be connected to the insertion port 10b, but the present invention is not limited to this, and the tube 21 is fixed to the outer periphery of the insertion portion 2. By doing so, it goes without saying that the tube 21 may directly guide any of the treatment tools 31 to 34 into the subject.

1. Endoscope (insertion device)
2... Insertion part 2z... Portion of the insertion part located outside the subject 10... Treatment instrument insertion passage 20... Treatment instrument insertion tool 21... Tube (treatment instrument guide portion)
22... Guide body 22m... Groove (second engaging portion)
22p... Insertion port of the main body of the guide portion 22s... Slit (second engaging portion)
22s1... 1st slit 22s2... 2nd slit 22s3... 1st slit 31-34... Treatment tool 41-44... Slider (treatment tool operation part)
41g... Outer surface of treatment tool operating portion 41t-44t... Protrusion (first engaging portion)
41td... Protrusion 50... Membrane 50h... Hole N... Longitudinal direction

Claims (8)

A treatment instrument insertion tool which is attached to an insertion device to be inserted into a subject and inserts a treatment instrument for treating the subject into the subject,
A treatment instrument guide part for guiding the treatment instrument into the subject,
When the insertion part of the insertion device grasped by one hand of the operator is inserted into the subject, the insertion part is detachably attached to a portion of the insertion part located outside the subject and the treatment tool guide is provided. A guide portion main body which is provided on one end side of the portion and serves as an insertion port of the treatment instrument into the treatment instrument guide portion,
A treatment tool operating unit that is attached to the treatment tool, is detachable from the guide body, and is operated by the one hand of the operator after the mounting,
Equipped with,
A first engaging portion is provided on the outer surface of the treatment instrument operating portion,
Wherein the guide body, the treatment instrument insertion tool, wherein the second engagement portion and the first engagement portion is freely fitted into that provided. The treatment instrument insertion instrument according to claim 1, wherein the treatment instrument operation section attached to each of the plurality of treatment instruments is selectively attachable to and detachable from the guide section body. The treatment instrument operation part according to claim 1, wherein the treatment instrument operation part is attachable to and detachable from the treatment instrument, and is attachable to and detachable from the guide portion main body in a state of being attached to the treatment instrument. Insertion tool. The first engaging portion is a protrusion provided on the outer surface of the treatment instrument operating portion,
The second engaging portion includes a first slit provided in the guide body, the first slit extending along a longitudinal direction in which the treatment instrument guide portion guides the treatment instrument, and the first slit. The treatment instrument insertion instrument according to claim 1 , further comprising a second slit that is continuous and has an angle with respect to the longitudinal direction. The second engaging portion is a slit provided in the guide body and a plurality of grooves formed in the slit,
The said 1st engaging part is a projection which can be fitted in the said slit provided in the said outer surface of the said treatment tool operation part, and can be fitted in any one said groove|channel, It is characterized by the above-mentioned. treatment instrument insertion instrument according to 1. The second engaging portion is a slit provided in the guide portion main body,
The first engaging portion, according to claim 1, wherein at least a portion is a projection provided on the outer surface of freely the treatment instrument operation unit fitted in said slit by elastic deformation Treatment tool insertion tool. The treatment instrument guide part is a tube whose other end is connected to a treatment instrument insertion passage of the insertion device,
The treatment instrument insertion tool according to claim 1, wherein the tube guides the treatment instrument into the subject through the treatment instrument insertion passage. Inside the boundary between the treatment instrument guide portion and the guide portion main body, there is provided a film having a hole through which the treatment instrument passes and suppressing the movement of liquid from the treatment instrument guide portion to the guide portion main body. The treatment tool insertion tool according to claim 1, wherein the treatment tool insertion tool is provided.

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