JP2005261734A - Treatment tool for endoscope and endoscope treatment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment tool for an endoscope and an endoscope treatment system in which a freely detachable treatment unit is easily mounted by movement in only one direction and a technique is executed easily in a short time. <P>SOLUTION: The treatment tool 1 for the endoscope comprises: the treatment unit 8 provided with a treatment part 6 for receiving driving force from the outside and performing treatment to an object part and a treatment part main body 7 movable inside a forceps channel back and forth supporting the treatment part 6; a treatment part operation unit 12 provided with a driving force transmission means 10 for transmitting the driving force to the treatment part 6 and a back and forth driving force transmission means 11 for transmitting back and forth driving force in the longitudinal direction of the forceps channel to the treatment part main body 7; a first connection means 13 for positioning the treatment unit 8 with respect to the treatment part operation unit 12, then rotating the treatment unit 8 relatively in one direction to the treatment part operation unit 12 and connecting the treatment part main body 7 and the back and forth driving force transmission means 11; and a second connection means 15 for connecting the treatment part 6 and the driving force transmission means 10 on the basis of the rotation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an endoscope treatment tool and an endoscope treatment system.

There are many types of endoscope treatment tools, and they are selected and used according to the application. Therefore, many kinds of treatment tools must be owned and stored, and their management is troublesome.
In view of this, there have been proposed ones that can detachably replace the treatment unit, which is the distal end portion of the treatment tool, for each of the hard and soft ones (see, for example, Patent Documents 1, 2, and 3).
In addition, an endoscope treatment system has been proposed in which a treatment unit is detachably attached to an arm portion incorporated in an endoscope (see, for example, Patent Document 4).
US Pat. No. 5,368,606 (FIG. 3) US Pat. No. 5,782,748 (FIGS. 7, 8, 9) West German Patent No. G8905099.1 (FIG. 4) JP-A-6-54801 (FIG. 1)

However, the conventional endoscopic treatment tools described in Patent Documents 1 to 3 must be sequentially connected by movement in two different directions when connecting the treatment unit side to the sheath side, and the connection is troublesome. In particular, there is a problem that two-way control is required when it is desired to connect automatically.
Further, the technique described in Patent Document 4 has a problem that the system becomes large and expensive.
The present invention has been made in view of the above circumstances, and is intended for an endoscope in which a treatment unit that is made detachable can be easily attached by movement in only one direction, and a procedure can be easily performed in a short time. An object is to provide a treatment tool and an endoscope treatment system.

The present invention employs the following means in order to solve the above problems.
An endoscopic treatment tool according to the present invention is an endoscopic treatment tool that is inserted into a forceps channel of an endoscope, and receives a driving force from the outside and performs a treatment on a target site; A treatment unit having a treatment part main body that supports the treatment part and is capable of advancing and retreating in the forceps channel; drive force transmitting means for transmitting the driving force to the treatment part; and Any of the treatment unit and the treatment unit operation unit after positioning the treatment unit with respect to the treatment unit operation unit and a treatment unit operation unit having an advancing / retreating drive force transmission means for transmitting advancing / retreating driving force in the longitudinal direction A first connection means for connecting the treatment portion main body and the advance / retreat driving force transmission means by moving the one relative to the other in one direction; and the treatment portion and the driving force transmission means based on the relative movement. And Characterized in that it comprises a second connection means for connection.

  This endoscopic treatment tool transmits the advancing / retreating driving force between the treatment unit main body and the treatment unit main body by moving the one of the treatment unit and the treatment unit operation unit in one direction relative to the other. The treatment unit and the driving force transmission means can be connected to each other by the second connection means and the treatment unit can be mounted on the treatment part operation unit.

Further, the endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the advance / retreat driving force transmission means is an outer tube formed in a tubular shape, and the driving force transmission means includes: The operation member is formed in a linear shape and is capable of moving back and forth in the outer tube.
In this endoscope treatment tool, since the operation member is arranged in the outer tube, the outer diameter of the treatment unit operation unit can be reduced.

The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the first connection means moves the treatment portion main body about an axis relative to the advance / retreat driving force transmission means. It is a means for rotating and connecting to each other.
In this endoscope treatment tool, both the first connection means and the second connection means act simultaneously by rotating the treatment portion main body around the axis relative to the advance / retreat driving force transmission means. Thus, the treatment unit and the treatment unit operation unit can be connected.

The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the first connecting means has a short tube portion in which a spiral groove is formed from the distal end toward the proximal end. And a tubular portion provided with a convex portion protruding in the radial direction and capable of engaging with the spiral groove.
This endoscopic treatment tool has a convex shape by rotating the treatment portion main body in one direction around the axis with respect to the advancing / retreating driving force transmitting means from a state in which the convex portion is in contact with the tip position of the spiral groove. The portion is guided by the spiral groove, the tubular portion and the short tube portion can be fitted, and the treatment portion main body and the advance / retreat driving force transmitting means can be connected by rotational movement about the axis.

The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the first connecting means is either a thread groove on an inner peripheral surface or a female screw groove on an outer peripheral surface. A short pipe part formed with one side,
One of the female screw groove and the outer peripheral surface is formed with either a female screw groove or a protruding portion formed so as to be screwable with the short pipe portion.
The endoscope treatment tool is configured to rotate the treatment portion main body in one direction around the axis with respect to the advancing / retreating driving force transmitting means from a state in which the protrusion and the short tube portion are in contact with each other. The tube portion can be screwed together, and the treatment portion main body and the advance / retreat driving force transmission means can be connected by rotational movement about the axis.

  Further, the endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the second connecting means is either an internal thread groove or an external thread groove. A columnar part formed on one side and provided at either the distal end of the driving force transmitting means or the base end of the treatment part, and a protrusion provided on the other side and formed to be screwable with the columnar part. The female screw groove and the male screw groove are formed in the same direction as the screwing direction of the first connecting means.

  The endoscope treatment tool is driven by rotating the treatment portion main body in one direction around the axis with respect to the advancing / retreating drive force transmitting means from a state in which the columnar portion and the protruding portion are in contact with each other. The force transmission means can be screwed together. Therefore, the connection between the treatment section main body and the advance / retreat driving force transmission means and the connection between the treatment section and the driving force transmission means can be performed simultaneously.

Further, the endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the first connecting means moves the advance / retreat driving force transmission means from the axial direction with respect to the treatment portion main body. It is a mechanism which makes it approach and mutually connects.
In this endoscope treatment tool, the treatment section main body and the advance / retreat driving force transmission means are brought into contact with each other, and at least one of them is approached in the axial direction with respect to the other. Both of the connecting means act simultaneously to connect the treatment portion and the treatment instrument insertion portion.

  The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the first connection means has one end of the proximal end of the treatment section main body or the advance / retreat driving force transmission means. A short pipe portion connected to the tip end and having a spiral groove formed on the side surface from the other end toward the one end side. The short pipe portion can be fitted into the short pipe portion and protrudes in the radial direction to engage with the spiral groove. A tubular portion provided with a convex portion capable of being supported, and the tubular portion or the short tube portion is rotatably supported around a central axis by either the treatment portion main body or the advance / retreat driving force transmission means. It is preferable.

  In this endoscopic treatment tool, the convex portion and the short tube portion are relatively rotatable, and therefore, when the short tube portion and the tubular portion are brought into contact with each other, the convex portion is formed into a spiral groove. The convex portion is guided to the spiral groove by moving the treatment portion main body and the advance / retreat driving force transmission means in the axial direction from the state of being engaged with the distal end position, and the tubular portion is directed to the short tube portion or the short tube portion. The tubular portion and the short tube portion can be fitted while rotating the tube portion with respect to the tubular portion, and the treatment portion main body and the advancing / retreating driving force transmitting means can be connected by one-way operation in the axial direction.

  The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the first connecting means extends in the axial direction to form a part of a tubular side surface, and the advance / retreat is performed. A leg piece portion having a free end at a side where the driving force transmitting means and the treatment portion main body are opposed to each other, and a jaw on a free end side inner peripheral surface of the leg piece portion A short tube portion having a ring-shaped pressing portion that is axially biased and slidable on an outer peripheral surface of the leg piece portion, and an outer peripheral surface that can be engaged with the jaw portion It is preferable that a concave portion is formed and a tubular portion that can be fitted into the short tube portion is provided.

In this endoscope treatment instrument, the tubular portion is inserted into the short tube portion by bringing the treatment portion main body and the advancing / retreating driving force transmitting means closer in the axial direction from the state in which the tubular portion and the short tube portion are in contact with each other. Is done. At this time, the jaw part is pushed at the proximal end of the short pipe part and the leg piece part is bent radially outward, so that the tubular part is shortened while moving the holding part toward the axial base end side of the short pipe part. It can be fitted into the tube.
When the tubular portion is moved into the short tube portion to a position where the concave portion and the jaw portion engage with each other, the force for bending the leg piece portion radially outward is eliminated by the engagement between the concave portion and the jaw portion, and the pressing portion is It is returned to its original position while pressing the leg piece inward in the radial direction. Therefore, the engagement state between the concave portion and the jaw portion can be maintained by the pressing portion. Accordingly, the treatment portion main body and the advance / retreat driving force transmission means can be connected by a one-way operation in the axial direction.

The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the recess is partitioned into a plurality of small recesses in the circumferential direction by a plurality of partition members, and the jaw part is It is preferable that it is formed to be able to engage with one of the small recesses.
Even if the treatment instrument body is rotated about the axis with respect to the short tube section in a state where the treatment section body and the advance / retreat driving force transmission means are engaged, The movement can be restricted by the partition member, and the relative rotation between the treatment portion main body and the advance / retreat driving force transmission means can be suppressed.

Further, the endoscope treatment tool according to the present invention is the endoscope treatment tool, and has an uneven surface on one of the opposing surfaces of the distal end of the advance / retreat driving force transmission means or the proximal end of the treatment portion main body. It is preferable that a convex portion is formed on the other facing surface, and a convex concave portion that can engage with the concave and convex portion is formed.
This endoscopic treatment tool has an uneven portion and an uneven surface even when an attempt is made to rotate the treatment portion main body around the axis with respect to the advance / retreat driving force transmission means in a state where the treatment portion main body and the advance / retreat driving force transmission means are engaged. The relative rotation after the treatment portion main body and the advance / retreat driving force transmission means are connected can be suppressed.

  The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the first connection means is disposed at a distal end of the advance / retreat driving force transmission means or a proximal end of the treatment portion main body. The short tube portion provided and the proximal end of the treatment portion main body or the distal end of the advance / retreat driving force transmitting means extend in the axial direction, and the free end is formed to be able to bend in the radial direction, and inside or outside the short tube portion It is preferable that it is a snap fit mechanism provided with the leg piece part which can be fitted.

  In this endoscope treatment tool, since the first connecting means is a snap-fit mechanism, the treatment portion main body and the advancing / retreating driving force transmitting means are moved in the axial direction from the state where the tubular portion and the short tube portion are in contact with each other. The treatment unit and the treatment part operation unit can be connected by one-way operation by bringing the short pipe part and the leg piece part into close proximity with each other.

  Further, the endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the second connecting means is either an internal thread groove or an external thread groove. One is formed and a columnar part provided at the tip of the driving force transmitting means and either a thread groove on the outer peripheral surface or a female thread groove on the inner peripheral surface are formed so as to be screwable with the columnar part. A protrusion formed on the proximal end side of the treatment portion, wherein the male screw groove and the female screw groove are formed in the same direction as the screwing direction of the first connecting means, and the protrusion is It is possible to rotate around an axis in the same direction as the tubular portion.

  When the endoscope treatment tool is further brought closer to the treatment portion body from the state in which the columnar portion and the protruding portion are in contact with each other, the advance / retreat driving force transmission means and the driving force transmission means are moved toward the treatment portion main body. By rotation of the tubular part accompanying connection, the projecting part can be rotated about the axis and screwed with the columnar part.

  The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the proximal end of the treatment section main body is disposed at the distal end of the advance / retreat driving force transmission means or the proximal end of the treatment section main body. Alternatively, a first short pipe portion in which a first notch portion into which a distal end of the advance / retreat driving force transmission means can be inserted from the radially outer side is formed in a part of the outer peripheral surface is provided, and the distal end of the driving force transmission means Or the 2nd notch part which can insert the base end of the said treatment part or the front-end | tip of the said driving force transmission means from radial direction outer side was formed in a part of outer peripheral surface at the base end of the said treatment part. A short pipe portion is provided, and the first connecting means includes a first convex portion formed at least partially along an inner circumferential surface including the first cutout portion, and the treatment portion main body or A first recess formed along the circumferential direction of the outer circumferential surface of the advance / retreat driving force transmission means and engageable with the first projection; The second connecting means includes a second protrusion formed on at least part of the inner circumferential surface including the second notch, and the outer circumferential surface of the treatment section or the driving force transmitting means. A second recess that is formed along the direction and engageable with the second protrusion, and the notch direction of the first notch and the second notch is substantially the same direction. It is characterized by being.

  In this endoscope treatment instrument, the treatment portion main body or the advancing / retreating driving force transmission means is inserted while engaging the first convex portion and the first concave portion from the first notch portion into the first short tube portion. Can be connected. At this time, the treatment portion or the driving force transmitting means is inserted into the second short tube portion while engaging the second convex portion and the second groove portion from the second notch portion into the second short tube portion. Both can be connected and a treatment part and a driving force transmission means can be combined by movement of the direction which becomes the perpendicular direction of the central axis of a treatment part main part.

An endoscope treatment system according to the present invention includes an endoscope and an endoscope treatment tool according to the present invention that is used together with the endoscope, and the treatment portion main body is placed on a central axis with respect to the forceps channel. Rotating means capable of rotating around is disposed.
In this endoscopic treatment system, the treatment unit can be rotated around the central axis by engaging the treatment unit with the rotating means in the forceps channel. Therefore, by operating the rotating means in a state where the first connecting means and the second connecting means are in contact with each other, both the first connecting means and the second connecting means can be operated simultaneously. The treatment unit and the treatment unit operation unit can be connected.

Further, the endoscope treatment system according to the present invention is the endoscope treatment system, wherein the rotating means includes a spiral guide path provided on an outer peripheral surface of the treatment section main body, the guide path, And a convex portion protruding radially inward from an inner peripheral surface of the forceps channel.
The endoscope treatment system according to the present invention is the endoscope treatment system, wherein the rotating means includes a spiral guide path provided on an inner peripheral surface of the forceps channel, and the guide path. And a convex portion protruding radially outward from the outer peripheral surface of the treatment portion main body.

  In this endoscope treatment system, when the treatment unit operation unit is operated to move the treatment unit to the distal end side of the forceps channel with the convex portion engaged with the end portion of the guide path, the convex portion becomes a spiral groove. The treatment unit body can be rotated around the axis along the guide path, and the treatment unit and the treatment unit operation unit can be connected by the first connection means and the second connection means.

The endoscopic treatment system according to the present invention is the endoscopic treatment system, wherein the rotation means includes a rotation drive unit provided on an inner peripheral surface of the forceps channel. To do.
In this endoscope treatment system, the treatment unit can be directly rotated around the axis by the rotation drive unit, and the treatment unit and the treatment unit operation unit can be connected by the first connection means and the second connection means. it can.

  Further, an endoscope treatment system according to the present invention is the endoscope treatment system, comprising an endoscope and an endoscope treatment tool according to the present invention used together with the endoscope, The endoscope includes an automatic insertion / removal mechanism capable of moving the treatment unit operation unit back and forth in the forceps channel.

  In this endoscope treatment system, when a treatment unit is placed in a forceps channel and the treatment portion operation unit is moved to the distal end side of the forceps channel by an automatic insertion / extraction mechanism, the treatment unit and the treatment portion operation unit are brought into contact with each other. Further, the first and second connection means are simultaneously connected by one-way operation by causing the advance / retreat driving force transmission means and the treatment portion main body to approach each other in the axial direction. A treatment unit operation unit can be connected.

  According to the present invention, it is possible to easily attach and detach the treatment unit which is detachable from the treatment unit operation unit by moving in only one direction. Moreover, the attachment / detachment of the treatment portion main body and the advance / retreat driving force transmission means and the attachment / detachment of the treatment portion and the driving force transmission means can be performed simultaneously, and the procedure can be easily performed in a short time.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
An endoscope treatment tool 1 according to the present embodiment constitutes an endoscope treatment system 3 together with an endoscope 2, and is an endoscope treatment tool inserted into a forceps channel 5 of the endoscope 2. A treatment unit 8 having a treatment portion 6 that receives a driving force from the outside and performs treatment on the target site; a treatment portion body 7 that supports the treatment portion 6 and can advance and retreat in the forceps channel 5; A treatment section operation unit 12 having a driving force transmission means 10 for transmitting a driving force to the section 6; an advancing / retreating driving force transmitting means 11 for transmitting an advancing / retreating driving force 11 in the longitudinal direction of the forceps channel 5 to the treatment section main body 7; After positioning the treatment unit 8 with respect to the treatment unit operation unit 12, the treatment unit 8 is rotated relative to the treatment unit operation unit 12 in one direction to connect the treatment unit body 7 and the advancing / retreating driving force transmission means 11. The first connecting means 13 and this And a second connecting means 15 for connecting the treatment section 6 on the basis of rolling and driving force transmitting means 10.

The treatment section 6 includes a pair of forceps pieces 16 and 17 and is connected to a link mechanism 18 that converts the driving force transmitted from the driving force transmission means 10 into an opening / closing operation force of the pair of forceps pieces 16 and 17.
The treatment portion main body 7 has a proximal end formed in a cylindrical shape and a distal end branched to support the pair of forceps pieces 16 and 17 so as to be opened and closed.
A connection member 20 that can be connected to the driving force transmission means 10 is supported at the base end of the link mechanism 18 so as to be rotatable about an axis.
The advancing / retreating driving force transmitting means 11 is a mantle tube 21 formed in a tubular shape, and the driving force transmitting means 10 is an operation wire (operating member) 22 formed in a linear shape and capable of advancing and retreating in the mantle tube 21. Has been.
The operation wire 22 is restricted from rotating around the axis with respect to the outer tube 21 by a first rotation restricting member 23 disposed on the outer tube 21.

The first connection means 13 has one end 25 a connected to the tip of the outer tube 21, and a short tube portion 25 in which a spiral groove 26 is formed on the side surface from the other end 25 b toward the one end 25 a side. A tubular portion 28 provided with a convex portion 27 that can be fitted and connected to the proximal end of the treatment portion main body 7 and that protrudes in the radial direction and can be engaged with the spiral groove 26 is provided. The tubular portion 28 is supported by the treatment portion main body 7 through a bearing 30 so as to be rotatable around the central axis, and the first connecting means 13 rotates the tubular portion 28 about the axis with respect to the outer tube 21. And means for connecting to each other.
The tubular portion 28 is provided with a second rotation restricting member 31 that restricts the rotation of the connecting member 20 around the axis with respect to the tubular portion 28. Thereby, when the tubular part 28 rotates, the connection member 20 also follows and rotates.
The spiral groove 26 has a width in which the convex portion 27 can be fitted, and is formed from the distal end of the short tube portion 25 to a rotational position of approximately 90 degrees from the proximal end side.

The second connecting means 15 includes a disk portion 32 connected to the connection member 20 on the side surface, a cavity portion 33 disposed at the tip of the operation wire 22 and capable of accommodating the disk portion 32, and the disk portion 32. A columnar portion 36 having a slit 35 larger than the plate width and having an opening width smaller than the diameter and capable of guiding the disc portion 32 to the cavity portion 33 is provided.
The direction of the disc part 32 is set to a direction in which the convex part 27 can be inserted into the slit 35 when the convex part 27 is in a position where it can engage with the tip of the spiral groove 26.

The endoscope 2 includes a flexible insertion section 37, an operation section 38 for operating the insertion section 37, an automatic insertion / removal mechanism 40 capable of driving the treatment section operation unit 12 forward and backward in the forceps channel 5, and an operation section. And a storage section 41 that is connected to the storage section 38 and can store the treatment section operation unit 12.
The automatic insertion / removal mechanism 40 includes a pair of rollers 42 and 43 that have a rotation axis that is orthogonal to the axial direction of the outer tube 21 and that are rotatable and are disposed to face each other with the outer tube 21 being pressed. A driving unit 45 including a motor that is connected to the rollers 42 and 43 and rotationally drives the rollers 42 and 43 and a control unit (not shown) that controls driving of the driving unit 45 are provided.
The operation unit 38 is provided with a treatment unit insertion port 46 that is communicated with the forceps channel 5 and has a size that allows the treatment unit 8 to be inserted into the forceps channel 5 and placed thereon. The unit insertion port 46 communicates with an insertion passage 47 through which the treatment section operation unit 12 can be inserted.

The roller 42 is connected to the roller 43 and is rotatable in the direction opposite to the rotation direction of the roller 43. The control unit is interlocked with a switch 48 provided in the operation unit 38, and drive control is performed by operating the switch 48.
The switch 48 includes, for example, a forward switch 48A for moving the treatment section operation unit 12 to the distal end side of the forceps channel 5 and a backward switch 48B for moving to the proximal end side.

Next, an operation method, an operation and an effect of the endoscope treatment tool 1 and the endoscope treatment system 3 according to the present embodiment will be described.
First, the insertion portion 37 of the endoscope 2 shown in FIG. 2 is inserted into the body cavity.
Next, the predetermined treatment unit 8 is inserted into the treatment unit insertion port 46, and is fixed in the forceps channel 5 so that the disc portion 32 is oriented in the slit 35.

Then, in a state where the treatment unit body 7 is gripped and fixed in the treatment unit insertion port 46, the advancement switch 48A is operated to drive the drive unit 45, and the treatment unit operation unit 12 is moved from the storage unit 41 to the distal end of the forceps channel 5 The pair of rollers 42 and 43 are rotated in the direction of feeding to the side. As a result, the treatment section operation unit 12 sandwiched and pressed between the pair of rollers 42 and 43 is sent out from the insertion passage 47 in the direction of the forceps channel 5 to move the distal end to the position of the treatment unit insertion port 46.
At this time, the convex portion 27 is in a position that can be engaged with the tip of the spiral groove 26.

Further, when the drive unit 45 is driven, the disc part 32 is inserted into the slit 35 by the movement of the treatment part operation unit 12 and reaches the cavity part 33. Further, the convex portion 27 is engaged with the tip of the spiral groove 26 and is further fitted into the spiral groove 26.
Here, since the tubular portion 28 and the short tube portion 25 are relatively rotatable, when the forward / backward driving force transmitting means 11 is further moved in the axial direction, the convex portion 27 is engaged with the tip of the spiral groove 26. The convex portion 27 is guided to the spiral groove 26 from the combined state, and the tubular portion 28 is fitted to the short tube portion 25 while rotating with respect to the short tube portion 25.

At this time, since the relative rotation of the connecting member 20 with respect to the tubular portion 28 is restricted by the second rotation restricting member 31, the connecting member 20 similarly rotates with respect to the columnar portion 36, and the inside of the cavity portion 33. Thus, the disk portion 32 rotates approximately 90 degrees with the diameter direction as the rotation axis.
Thus, the treatment unit 8 is attached to the treatment unit operation unit 12 with the thickness direction of the disc portion 32 and the width direction of the slit 35 being substantially orthogonal. At this time, since the relative rotation of the operation wire 22 with respect to the outer tube 21 is restricted by the first rotation restricting member 23, it is possible to prevent the columnar portion 36 from rotating with the rotation of the connecting member 20. Thus, the connection state between the treatment unit 8 and the treatment unit operation unit 12 is maintained.

  After the mounting, the advancement switch 48A is operated to drive the drive unit 45 again to pass the treatment unit operation unit 12 through the forceps channel 5 to the distal end of the insertion unit 37, and only the operation wire 22 is advanced or retracted with respect to the outer tube 21. A treatment tool operation section (not shown) to be operated is operated to operate the pair of forceps pieces 16 and 17 to perform a predetermined treatment.

After the treatment is completed, the retreat switch 48B is operated to drive the drive unit 45, and the automatic insertion / removal mechanism 40 is operated in the direction in which the treatment unit operation unit 12 is stored in the storage unit 41.
When the treatment unit 8 reaches the treatment unit insertion port 46, the drive unit 45 is temporarily stopped by stopping the backward switch 48B. When the treatment section main body 7 is held and fixed and the retracting switch 48B is operated again to drive the drive section 45, the movement of the treatment section operation unit 12 causes the tubular section 28 to rotate with respect to the short tube section 25, thereby causing a convex shape. The portion 27 is guided to the tip of the spiral groove 26 and the tubular portion 28 is detached from the short tube portion 25. At this time, the disc portion 32 is rotated 90 degrees in the hollow portion 33 so that the disc portion 32 can be inserted into the slit 35, and the disc portion 32 passes through the slit 35 and is detached from the columnar portion 36.
In this way, the treatment unit 8 is removed from the treatment unit operation unit 12.

According to the endoscope treatment tool 1 and the endoscope treatment system 3, the treatment unit 8 is placed in the forceps channel 5, and the treatment section operation unit 12 is moved to the distal end side of the forceps channel 5 by the automatic insertion / removal mechanism 40. The treatment unit 8 and the treatment unit operation unit 12 can be brought into contact with each other. At this time, by pressing the treatment portion operation unit 12, the tubular portion 28 rotates around the axis with respect to the short tube portion 25, and the treatment portion main body 7 and the short tube portion 25 are connected by the first connecting means 13. In addition, the treatment unit 6 can be attached to the treatment unit operation unit 12 by connecting the treatment unit 6 and the operation wire 22 via the connection member 20 with the second connection means 15.
Moreover, since the operation wire 22 is arranged in the outer tube 21, the outer diameter of the treatment section operation unit 12 can be reduced.

Next, a second embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the second embodiment and the first embodiment is that the first connecting means 51 of the endoscope treatment tool 50 according to this embodiment has a female thread groove 52a formed on the inner peripheral surface. A short tube portion 52, and a first protrusion (protrusion portion) 55 provided at the base end of the treatment portion main body 53 and having a thread groove 55a formed on the outer peripheral surface thereof so as to be screwable with the short tube portion 52. The second connecting means 56 is formed with a female thread groove 57a on the inner peripheral surface and is provided with a columnar part 57 provided at the distal end of the operation wire 22, and can be screwed into the columnar part 57 provided on the connecting member 20. And a second protrusion 58 formed on the first connecting means 51, the female screw groove 57a is formed in the same direction as the screwing direction of the first connecting means 51, and the screw pitch is the same. is there.

In addition, the endoscope treatment system 60 includes a rotation unit 63 that can move the treatment portion main body 53 about the central axis with respect to the forceps channel 62 of the endoscope 61.
The rotating means 63 has a spiral guide path 65 provided on the outer peripheral surface of the treatment portion main body 53, and a convex shape that is engageable with the guide path 65 and protrudes radially inward from the inner peripheral surface of the forceps channel 62. Part 66.
The number of turns of the guide path 65 is substantially the same as the number of rotations required for connection in the first connecting means 51 and the second connecting means 56.
A plurality of the convex portions 66 are arranged along the screw winding of the guide path 65, and are provided so as to protrude in directions different from each other by 90 degrees, for example.

Next, an operation method, an operation and an effect of the endoscope treatment tool 50 and the endoscope treatment system 60 according to the present embodiment will be described.
First, the treatment unit 59 is inserted into the treatment unit insertion port 46 in such a direction that the convex portion 66 and the end portion of the guide path 65 can come into contact with each other. Then, the advancement switch 48A is operated to drive the drive unit 45, the treatment unit operation unit 64 is sent out from the insertion passage 47 toward the forceps channel 62, and the distal end is moved to the treatment unit insertion port 46 position. And the first protrusion 55, the columnar part 57 and the second protrusion 58 are brought into contact with each other.

  In this state, when the treatment portion operation unit 60A is inserted into the forceps channel 62, the convex portion 66 is guided into the guide path 65, and the entire treatment unit 50A moves around the central axis while moving around the forceps channel 62. The short tube portion 52 and the first protruding portion 55 are screwed together, and at the same time, the columnar portion 57 and the second protruding portion 58 are screwed together.

At this time, since a plurality of convex portions 66 are arranged, even if any one of the convex portions 66 is located at the branch portion of the treatment portion main body 53, the other convex portions 66 are inserted into the guide path 65. Since it is said that the rotation does not break off in the middle. In this way, the treatment unit 50A is connected to the treatment unit operation unit 60A.
After the engagement between the convex portion 66 and the guide path 65 is released, the treatment unit 50A moves in the forceps channel 62 without rotating around the axis.
According to the endoscope treatment tool 50 and the endoscope treatment system 60, similarly to the first embodiment, the treatment unit 50A is moved to the treatment portion operation unit 60A by one-way (rotation direction) operation around the axis. Can be attached to.
Note that the convex portion 66 may be connected to the spring 66 </ b> A so as to protrude into the forceps channel 62. In this case, when the convex portion 66 is brought into contact with a place other than the guide path 65 of the treatment portion main body 53, the convex portion 66 can be immersed in the side surface of the forceps channel 62, and does not get in the way. When engaged with the guide path 65, it can be projected. Therefore, even if the treatment unit 50A is placed in any direction in the treatment unit insertion port 46, the treatment portion main body 53 and the guide path 65 can be engaged.

Next, a third embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the third embodiment and the second embodiment is that in the rotation means 67A of the endoscope treatment system 67 according to this embodiment, a spiral guide path 65 is provided on the inner peripheral surface of the forceps channel 68. In other words, the convex portion 66 that can be engaged with the guide path 65 is arranged to protrude radially outward from the outer peripheral surface of the treatment portion body 7.
This endoscope treatment system 67 can also obtain the same operations and effects as those of the second embodiment.

Next, a fourth embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the fourth embodiment and the second embodiment is that the rotation means 69A of the endoscope treatment system 69 according to the present embodiment uses a rotation drive unit 70 provided on the inner peripheral surface of the forceps channel 5. It is a point that it has.

The rotation drive unit 70 includes a motor 72 in which a rotation shaft 71 is arranged in a direction along the forceps channel 5, and a side surface exposed along the wall surface 46 </ b> A of the treatment unit insertion port 46 connected to the rotation shaft 71. And a roller 75 housed therein.
The roller 75 has a tapered outer diameter that gradually increases from the insertion passage 47 side toward the forceps channel 5 side, and is rotatable to the roller storage portion 73 via the roller shaft 75A.
The wall surface 46A of the treatment unit insertion port 46 is formed to be inclined to the same extent as the side surface of the roller 75, and the central axis C1 of the forceps channel 5 and the central axis C2 of the insertion passage 47 are arranged eccentrically.

Next, an operation method, an operation and an effect of the endoscope treatment tool 76 and the endoscope treatment system 69 according to the present embodiment will be described.
First, the treatment unit 78 is inserted into the treatment unit insertion port 46 and placed on the side surface of the roller 75. Then, the advancement switch 48A is operated to drive the drive unit 45, and the treatment unit operation unit 60A is sent out from the insertion passage 47 in the direction of the forceps channel 5.
When the distal end of the treatment section operation unit 60A reaches the treatment unit insertion port 46, the motor 72 is rotated to rotate the roller 75.

At this time, since the roller 75 is formed in a taper shape, the treatment unit 78 is rotated from the forceps channel 5 side in the treatment unit insertion port 46 while rotating in the direction opposite to the roller 75 as the roller 75 rotates. Move to 47 side.
In this way, the short tube portion 52 and the first projecting portion 55, the columnar portion 57 and the second projecting portion 58 are brought into contact with each other and are screwed together by the rotation of the treatment unit 78.
According to the endoscope treatment tool 76 and the endoscope treatment system 69, the treatment unit 78 can be directly rotated around the axis by the rotation drive unit 70, and the first connection means 51 and the second connection means are provided. 56, the treatment unit 78 and the treatment section operation unit 60A can be connected to each other by one-way operation.

Next, a fifth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the fifth embodiment and the other embodiments described above is that the first connecting means 81 of the endoscope treatment tool 80 according to this embodiment is attached to the distal end of the outer tube 21 of the treatment section operation unit 82. The short tube coil portion 83 connected and formed in a winding shape and the outer peripheral surface of the tubular portion 85 that can be fitted into the short tube coil portion 83 are inserted between the windings of the short tube coil portion 83. It is the point provided with the convex-shaped part 86 formed in this.

  According to the endoscope treatment tool 80 and the endoscope treatment system 88, since the short tube coil portion 83 is formed in a winding shape, the short tube coil portion 83 and the convex portion 86 are brought into contact with each other. By rotating the treatment unit 87 with respect to the treatment portion operation unit 82 in a state of being in a state, the convex portion 86 is inserted between the windings of the short tube coil portion 83, and accordingly, the tubular portion 85 is replaced with the short tube coil portion. 83 can be fitted. Therefore, the treatment unit 87 and the treatment unit operation unit 82 can be connected by rotating in one direction around the axis.

Next, a sixth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the sixth embodiment and the fifth embodiment is that the first connecting means 91 of the endoscope treatment tool 90 according to the present embodiment is a short coil section that is a first coil section. 83 and a tubular portion 92 that is formed in a winding shape in the same direction as the short tube coil portion 83 and is a second coil portion that can be screwed into the short tube coil portion 83. .
The pitch of the coil portion of each of the short tube coil portion 83 and the tubular portion 92 is formed at the same pitch as the pitch of the female thread groove 57 a in the second connection means 51.

According to the endoscope treatment tool 90 and the endoscope treatment system 93, the short tube coil portion 83 that is the first coil portion and the tubular portion 92 that is the second coil portion are brought into contact with each other. By rotating the treatment portion main body 7 relative to the treatment portion operation unit 82, the tubular portion 92 can be screwed along the winding of the short tube coil portion 83, as in the fifth embodiment. In addition, the treatment unit 94 and the treatment unit operation unit 82 can be connected by rotational movement in one direction around the axis.
Note that at least one of the short tube coil portion 83 and the tubular portion 92 may be made of a shape memory alloy, and the diameter may be changed by temperature adjustment so that they can be fitted to each other.

Next, a seventh embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the seventh embodiment and the above embodiment is that the first connecting means 96 of the endoscope treatment tool 95 according to the present embodiment moves the treatment tool operation unit 97 in the axial direction with respect to the treatment unit 98. Are connected to each other and extend in the axial direction to be a part of the side surface of the treatment portion main body 100. The end portion is a free end and can be bent in the radial direction, and the radial direction. A leg piece portion 102 formed with an inwardly extending jaw portion 101 and a first concave portion (recess portion) 103 that can be engaged with the jaw portion 101 are formed on the outer peripheral surface and can be fitted inside the leg piece portion 102. The second connecting means 106 is connected to the distal end of the operation wire 22 and can accommodate the spherical portion 107 therein. The second recess (recess) 108 and the leaf spring member 110 are closed. It has a slit 111 that is urged and formed so as to be able to expand from a width smaller than the outer diameter of the spherical portion 107 to a size exceeding the outer diameter, and communicates the second concave portion 108 with its axially outer side. The gripping portion 112 is provided.

An operation method, operation, and effect of the endoscope treatment tool 95 and the endoscope treatment system 113 will be described.
When the treatment unit operation unit 97 is brought into contact with the treatment unit 98 and further moved as it is, the spherical portion 107 is inserted into the second recess 108 by the second connecting means 106 while expanding the slit 111. The
On the other hand, when the jaw portion 101 of the leg piece portion 102 is brought into contact with the distal end of the short tube portion 105 by the first connecting means 96, the leg piece portion 102 is bent radially outward and the treatment portion main body 100. The short pipe part 105 further approaches.

Then, the jaw portion 101 is fitted into the first recess 103 to engage the leg piece portion 102 and the short tube portion 105, and the spherical portion 107 is accommodated in the second recess 108. At this time, the width of the slit 111 is returned to approximately the same size as the diameter of the connection member 20 by the leaf spring member 110, the connection member 20 and the operation wire 22 are engaged, and the storage state of the second recess 108 is maintained. The treatment unit 98 and the treatment unit operation unit 97 are connected.
According to the endoscope treatment tool 95 and the endoscope treatment system 113, the operation wire 22 and the treatment portion 6 are connected via the connection member 20 only by the axial operation of the treatment portion operation unit 97. The treatment unit 98 and the treatment unit operation unit 97 can be connected.

Next, an eighth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the eighth embodiment and the seventh embodiment is that the first connecting means 116 of the endoscopic treatment instrument 115 according to this embodiment extends in the axial direction so that a part of the tubular side surface is formed. A leg piece 118 having an end portion on the side facing the treatment portion main body 117 as a free end 118a and capable of being bent in the radial direction, and having a jaw portion 120 formed on the inner peripheral surface of the free end 118a; A short pipe portion 123 having a ring-shaped pressing portion 122 that is slidable by being urged by a spring member 121 in the axial direction on the outer peripheral surface of the leg piece portion 118, and the jaw portion 120 can be engaged with the outer peripheral surface. A concave portion 125 is formed, and a tubular portion 126 that can be fitted into the short tube portion 123 is provided. The second connecting means is the same as in the seventh embodiment.

An operation method, operation, and effect of the endoscope treatment tool 115 and the endoscope treatment system 127 will be described.
When the treatment unit operation unit 130 is brought into contact with the treatment unit 128 in the state where the treatment unit 128 is placed in the treatment unit insertion port and moved as it is, the tubular portion 126 is fitted into the short tube portion 123, and a leg is attached to the end portion of the tubular portion 126. The jaw 120 of the piece 118 is brought into contact with the leg piece 118, and the leg piece 118 is bent outward in the radial direction. At this time, while the spring member 121 is contracted by the deformation of the leg piece portion 118, the holding portion 122 is pushed to the proximal end side of the short tube portion 123 and the tubular portion 126 is fitted to the short tube portion 123.

When the jaw 120 and the recess 125 are engaged, there is no force to bend the leg piece 118 radially outward, so the bending of the leg piece 118 is restored and the spring member 121 is restored. The holding part 122 returns to the original position.
According to the endoscope treatment tool 115 and the endoscope treatment system 127, the treatment unit 128, the treatment portion operation unit 130, and the treatment portion operation unit 130 are obtained only by the axial operation of the treatment portion operation unit 130, as in the other embodiments. Can be connected.

Next, a ninth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the ninth embodiment and the eighth embodiment is that the tubular portion 133 of the treatment unit 132 in the endoscope treatment tool 131 according to the present embodiment has a plurality of partition members 136 in the circumferential direction. The point is that it is partitioned into small recesses 137 and the jaws 138 are formed to be able to engage with one of the small recesses 137.

  According to the endoscope treatment tool 131 and the endoscope treatment system 140, the treatment portion main body 117 is rotated about the short tube portion 123 with the treatment portion main body 117 and the short tube portion 123 engaged with each other. Even if it tries to rotate, the movement of the jaw portion 138 in the circumferential direction can be restricted by the partition member 136, and the relative rotation between the treatment portion main body 117 and the short tube portion 123 can be suppressed. Therefore, by rotating the outer tube 21 around the axis, both the treatment units 132 can be rotated around the axis.

Next, a tenth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the tenth embodiment and the eighth embodiment is that a concavo-convex portion 145 is formed at the distal end of the short tube portion 143 in the treatment unit 142 of the treatment instrument for endoscope 141 according to this embodiment, and the treatment portion A convex concave portion 147 that can be engaged with the concave and convex portion 145 is formed on the opposite surface of the base end of the main body 146.

  According to the endoscope treatment tool 141 and the endoscope treatment system 148, the treatment portion main body 146 is rotated about the axis with respect to the outer tube 21 in a state where the treatment portion main body 146 and the short tube portion 143 are engaged. Even if it tries to rotate, the uneven | corrugated | grooved part 145 and the convex-concave part 147 are engaged, and the relative rotation after connecting the treatment part main body 146 and the short tube part 143 can be suppressed. Therefore, similarly to the ninth embodiment, the treatment unit 142 can be rotated around the axis by rotating the outer tube 21.

Next, an eleventh embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the eleventh embodiment and the eighth embodiment is that the short tube portion 152 in the treatment portion operation unit 151 of the treatment instrument for endoscope 150 according to the present embodiment is arranged in the axial direction at the distal end of the outer tube 21. A plurality of window portions 153 that are connected to each other and formed at intervals in the circumferential direction of the central portion of the tubular side surface, and the central portion of these window portions 153 has an axial direction and a vertical direction of the short tube portion 152. A leg piece 157 pivotally supported around the pivot shaft 155 and provided with a jaw 156 on the inner peripheral surface of the tip, and extends from the base end side of the window 153 toward the window 153 and has a tip that extends from the leg. The leaf spring portion 158 is provided so as to be immersed radially inward from the base end of the piece portion 157.

An operation method, operation, and effect of the endoscope treatment tool 150 and the endoscope treatment system 160 will be described.
When the treatment unit operation unit 151 is brought into contact with the treatment unit 128 placed in the treatment unit insertion port 46 and further moved as it is, the tubular portion 126 is inserted into the short tube portion 152 when the tubular portion 126 is fitted therein. When the jaw 156 of the leg piece 157 is brought into contact with the end of the leg piece 157, the leg piece 157 rotates around the pivot shaft 155 in the direction in which the jaw 156 goes outward in the radial direction of the short tube portion 152. . At this time, since the base end side of the leg piece portion 157 rotates inward in the radial direction, the leaf spring portion 158 is further bent inward in the radial direction so that the jaw portion 156 side of the leg piece portion 157 is radially inward. Rotational torque to be rotated is applied to the leg piece 157.

The treatment portion main body 117 and the short tube portion 152 are further brought closer to each other, and the jaw portion 156 and the concave portion 125 are engaged with each other, whereby the bending of the leaf spring portion 158 is relaxed and the leg piece portion 157 is pivoted on the pivot shaft 155. It rotates in the opposite direction to the above. Since the leg piece portion 157 is biased by the leaf spring portion 158 in this state, the engaged state between the jaw portion 156 and the concave portion 125 is maintained.
According to the endoscope treatment tool 150 and the endoscope treatment system 160, the treatment unit 128 and the treatment portion operation unit 151 are connected only by the axial operation of the treatment portion operation unit 151, as in the above embodiment. can do. Further, when the treatment unit 128 is removed from the treatment portion operation unit 151, the proximal end side of the leg piece portion 157 is pushed inward in the radial direction of the short tube portion 152, whereby the engagement state between the jaw portion 156 and the concave portion 125 is changed. Can be released, and both can be separated.

Next, a twelfth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the twelfth embodiment and the seventh embodiment is that the first connecting means 175 of the endoscope treatment tool 173 according to this embodiment is connected to the proximal end of the treatment portion main body 176 and has a diameter. A leg piece 178 formed with a jaw 177 facing outward in the direction and a hole (recess) 180 into which the jaw 177 can be inserted are formed on the inner peripheral surface, and the leg piece 178 can be fitted inside. The short pipe portion 181 and the leg piece portion 178 are disposed in the outer tube 21 so as to be movable forward and backward with respect to the treatment portion operation unit 182 and the short pipe portion 181 and the leg piece portion 178 are fitted. This is the point that a pressing sheath (restricting portion) 183 that restricts deformation in the radial direction is provided.
The outer diameter of the pressing sheath 183 is formed substantially the same as the inner diameter of the leg piece 178 and can be fitted into the leg piece 178.

A method for operating the endoscope treatment tool 173 and the endoscope treatment system 185, and actions and effects will be described.
The treatment unit operation unit 182 is brought into contact with the treatment unit 186 placed in the treatment unit insertion port 46, and further moved as it is.
At this time, the jaw 177 of the leg piece 178 is brought into contact with the tip of the short tube portion 181, whereby the leg piece portion 178 is bent radially inward and fitted into the short tube portion 181, and the treatment portion main body. 176 and the short pipe portion 181 further approach each other.
When the jaw 177 is immersed in the hole 180, the leg piece 178 is returned to its original state, and the leg piece 178 and the short pipe portion 181 are engaged.
In this state, when the holding sheath 183 is moved relative to the outer tube 21 and is fitted into the leg piece 178, the leg piece 178 is pressed between the holding sheath 183 and the short pipe 181 and has a diameter. The movement of the direction is restricted, and the engaged state between the jaw 177 and the hole 180 is maintained.

  According to the endoscope treatment tool 173 and the endoscope treatment system 185, the treatment unit 186 and the treatment portion operation unit 182 can be connected only by the axial operation of the treatment portion operation unit 182. Moreover, it can suppress that the leg piece part 178 and the short pipe part 181 leave | separate by the pressing sheath 183.

  As shown in FIG. 18, the first connecting means 162 of the endoscope treatment instrument 161 includes a short tube portion 165 having a convex portion 163 formed in the circumferential direction of the inner peripheral surface, and a treatment portion main body 166. A leg piece 167 extending in the axial direction from the proximal end and having a free end 167a that can be bent in the radial direction so as to be fitted between the inside of the short tube portion 165 and the distal end portion 22a of the operation wire 22; It is good also as a snap fit mechanism formed by providing the recessed part 168 engageable with the convex part 163 in the outer peripheral surface of the leg piece part 167, and forming with the short pipe part 165 and the leg piece part 167.

According to the endoscope treatment tool 161 and the endoscope treatment system 170, since the first connecting means 162 is a snap-fit mechanism, the leg piece portion 167 and the short tube portion 165 are brought into contact with each other. The treatment unit main body 166 and the outer tube 21 are made close to each other in the axial direction, the short tube portion 165 and the leg piece portion 167 are fitted, and the convex portion 163 and the concave portion 168 are engaged with each other. The unit operation unit 172 can be connected by a one-way operation.
Further, by fitting the operation wire 22 into the leg piece portion 167, the movement of the leg piece portion 167 in the radial direction can be restricted by the short tube portion 165 and the operation wire 22.

Next, a thirteenth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the thirteenth embodiment and the seventh embodiment is that the first connecting means 188 of the endoscope treatment tool 187 according to this embodiment extends in the axial direction from the distal end surface of the outer tube 21. A leg portion 191 having a tubular side surface and having an end portion that is a free end and capable of being bent in the radial direction and having a first recess 190 formed on the inner peripheral surface of the free end, and a tubular portion 192 The flange portion 193 formed so as to be engageable with the first concave portion 190 is provided at the end portion.
The leg pieces 191 are formed in a plate spring shape and are urged to expand outward in the radial direction.

A method for operating the endoscope treatment tool 187 and the endoscope treatment system 195, and actions and effects will be described.
The treatment unit 196 is inserted and placed in the treatment unit insertion port 46, the treatment unit operation unit 197 is brought into contact with the treatment unit 196, and the treatment unit operation unit 197 is further moved as it is. At this time, the slit 111 is expanded while the spherical portion 107 of the second connecting means 106 is inserted into the slit 111, and the spherical portion 107 is eventually inserted into the second recess 108.

  In this state, when the treatment unit operation unit 197 is moved in the direction of the forceps channel 5 and the treatment unit 196 is inserted into the forceps channel 5, the leg piece 191 is brought into contact with the side surface of the forceps channel 5 and radially inward. The flange portion 193 is inserted into the first recess 190 and the tubular portion 192 is inserted into the leg piece portion 191 in response to the resistance force toward the end. The second connection means 106 is connected in the same manner as in the seventh embodiment.

Thus, the forceps channel 5 maintains the connection state of the first connection means 188, thereby connecting the treatment unit 196 and the treatment unit operation unit 197.
According to the endoscope treatment tool 187 and the endoscope treatment system 195, the treatment unit 196 and the treatment portion operation unit 197 can be connected only by the axial operation of the treatment portion operation unit 197.

Next, a fourteenth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the fourteenth embodiment and the above embodiment is that the first connecting means 200 in the endoscope treatment tool 198 according to the present embodiment is connected to the distal end of the outer tube 21 and is radially directed from the side surface. The short tube portion 202 formed with the protruding convex portion 201 and the side surface of the short tube portion 202 provided on the proximal end side of the treatment portion main body 203 can be fitted with the convex portion on the fitting surface. 201 is provided with the receiving part 206 which has the elastic part 205 which has the softness | flexibility which can immerse 201 in.

The operation method, action, and effect of the endoscope treatment tool 198 and endoscope treatment system 207 will be described.
When the treatment unit operation unit 210 is brought into contact with the treatment unit 208 placed in the treatment unit insertion port 46 and the treatment unit operation unit 210 is further moved in this state, the convex portion 201 compresses the elastic portion 205. However, the short tube portion 202 is inserted into the receiving portion 206. At this time, the elastic part 205 after the convex part 201 has passed is restored again to its original state by its own restoring force, and the convex part 201 is embedded in the elastic part 205.
Thus, the treatment unit 208 and the treatment unit operation unit 210 are connected.
According to the endoscope treatment tool 198 and the endoscope treatment system 207, the treatment unit 208 and the treatment portion operation unit 210 can be connected by a relative movement operation in the axial direction.

Next, a fifteenth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the fifteenth embodiment and the above-described embodiment is that the proximal end of the treatment portion main body 212 can be inserted from the radially outer side into the distal end of the outer tube 21 of the endoscope treatment tool 211 according to this embodiment. A first short tube portion 215 in which a first notch 213 is formed on a part of the outer peripheral surface is provided, and a connection member 216 can be inserted into the distal end of the operation wire 22 from the outside in the radial direction. A second short pipe portion 218 having a notch 217 formed on a part of the outer peripheral surface is provided, and the first connecting means 220 has an inner peripheral surface of the first short pipe portion 215 including the first notch 213. A first convex portion 221 formed at least partially along the circumferential direction, and a first concave portion 222 formed along the circumferential direction of the outer peripheral surface of the treatment portion main body 212 and engageable with the first convex portion 221. And the second connecting means 223 includes at least a circumferential direction of the inner peripheral surface including the second notch 217. A second notch 225 formed in part, and a second notch 226 formed along the circumferential direction of the outer peripheral surface of the connection member 216 and engageable with the second recess 225, and has a first notch The notch direction of the part 213 and the second notch part 217 is set to be substantially the same direction by the rotation restricting member 23.

An operation method, operation, and effect of the endoscope treatment tool 211 and the endoscope treatment system 227 will be described.
First, the treatment unit 228 is inserted into the treatment unit insertion port 46. At this time, the orientation of the treatment section operation unit 230 is adjusted so that the first cutout section 213 and the second cutout section 217 both open toward the treatment unit insertion port 46.
Then, the treatment portion main body 212 is inserted into the first notch 213 while engaging the first convex portion 221 and the first concave portion 222, and at the same time, the second convex portion 226 and the second concave portion 225 are inserted. And the connecting member 216 is inserted into the second notch 217.

Thus, the treatment portion main body 212 and the outer tube 21 are connected at the first cutout portion 213, and the treatment portion 6 and the operation wire 22 are connected at the second cutout portion 217.
In this state, when the treatment unit operation unit 230 is advanced and retracted into and from the forceps channel 5, the radial movement of the treatment unit 228 relative to the treatment unit operation unit 230 is restricted by the forceps channel 5. The connection state at is maintained.
According to the endoscope treatment tool 211 and the endoscope treatment system 227, the treatment unit 228 and the treatment portion operation unit 230 are connected by an operation from the radial direction of the forceps channel 5 as in the other embodiments. Can be made.

Next, a sixteenth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the sixteenth embodiment and the first embodiment is that, as shown in FIG. 22, an endoscopic treatment instrument 238 according to this embodiment has a tubular portion 28 and a treatment portion main body 7 fixed thereto. It is a point that it is. Here, the connection member 240 is fixed to the link mechanism 241. In addition, you may provide a knurl in the surface of the treatment part main body 7 and the short pipe part 25 in order to make it easy to grasp and rotate.
In this case, first, the treatment unit 236 is moved in the axial direction with respect to the treatment instrument operation unit 237, and the disc portion 32 is inserted into the cavity portion 33 from the slit 35. At this time, the convex portion 27 is engaged with the tip of the spiral groove 26. Next, the treatment unit 236 is rotated around the axis with respect to the treatment unit operation unit 237 along the spiral groove 26. At this time, the tubular portion 28 is fitted to the short tube portion 25.

On the other hand, the connecting member 240 rotates in the same direction with respect to the columnar portion 36, and the disc portion 32 rotates about 90 degrees in the cavity portion 33 with the diameter direction as the rotation axis.
Thus, the treatment unit 236 is attached to the treatment unit operation unit 237 with the thickness direction of the disc portion 32 and the width direction of the slit 35 being substantially orthogonal. At this time, since the relative rotation of the operation wire 22 with respect to the outer tube 21 is restricted by the first rotation restricting member 23, it is possible to prevent the columnar portion 36 from rotating with the rotation of the connecting member 240. Thus, the connection state between the treatment unit 236 and the treatment unit operation unit 237 is maintained.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the first embodiment, the second connecting means includes a columnar portion provided at the distal end of the operation wire with either the female thread groove formed on the inner peripheral surface or the thread groove formed on the outer peripheral surface. The protrusion provided on the connecting member connected to the proximal end side of the treatment portion, wherein either the thread groove is formed on the outer peripheral surface or the female screw groove is formed on the inner peripheral surface so as to be screwable with the columnar portion. And the male thread groove and the female thread groove may be formed in the same direction as the screwing direction of the first connecting means, and the projecting portion may be rotatable about an axis in the same direction as the tubular portion. Absent.

Also in this case, since the short tube portion 25 and the tubular portion 28 are relatively rotatable, when the convex portion 27 is brought close to the tip of the spiral groove 26, it is close to the axial direction. The convex portion 27 is guided by the spiral groove 26 and the tubular portion 28 is fitted to the short tube portion 25 while rotating with respect to the short tube portion 25.
At this time, the columnar portion and the protruding portion are screwed together in the second connecting means, and the treatment unit can be connected to the treatment portion operation unit.

Further, as shown in FIG. 23, in the sixth embodiment, the endoscope treatment tool 231 can be moved forward and backward with respect to both the outer tube 21 and the operation wire 22 as in the thirteenth embodiment. An inner pressing portion 232 is provided that is formed so as to come into contact with the inner peripheral surface of the tubular portion 92 and to be pressed radially outward when the tubular portion 92 and the short tube coil portion 83 are screwed together. It doesn't matter if you have.
The endoscope treatment tool 231 and the endoscope treatment system 233 can also obtain the same operations and effects as in the thirteenth embodiment.
At this time, a screwing sheet 235 capable of reducing the frictional force at the time of screwing may be inserted into the screwing surfaces of the tubular portion 92 and the short tube coil portion 83.

  Although different from the present invention, as shown in FIGS. 24 and 25, the connecting means 242 is formed in the circumferential direction from the groove 243 and the end surface toward the treatment portion main body 7 and is long in the axial direction. A tubular portion 246 having a plurality of slits 245 having hole ends 245a, and a tubular portion that covers the tubular portion 246 and engages with the groove 243 so as to be rotatable about the axis with respect to the tubular portion 246. A plurality of convex portions 248 connected to the distal end of the outer tube 21 and projecting radially outward from the outer surface can be inserted into the slit 245 and fitted into the tubular portion 246. The endoscope treatment tool 251 including the short tube portion 250 and the endoscope treatment system 252 including the same may be used. In this case, a bottom portion 253 in which a through hole 253A through which a cross-sectional portion of the short tube portion 250 including the convex portion 248 can pass is provided on the end surface of the lock member 247 on the short tube portion 250 side. Further, the width of the slit 245 is set such that the convex portion 248 can be inserted.

  When the treatment unit 255 and the treatment portion operation unit 256 are connected with the endoscope treatment tool 251 and the endoscope treatment system 252, the short tube portion 250 can penetrate the through hole 253A of the lock member 247. Both are brought into contact with each other from the axial direction, and the convex portion 248 is inserted into the long hole 245 up to the long hole end 245a. As a result, the rotation of the treatment unit 255 and the treatment section operation unit 256 around the axis is restricted. Then, the lock member 247 is rotated about the axis to shift the phase between the convex portion 248 and the through hole 253A. At this time, even if a force for separating the treatment unit 255 and the treatment portion operation unit 256 in the axial direction is applied, the convex portion 248 is locked to the bottom portion 253 and the movement in the axial direction is also restricted. Therefore, the treatment unit 255 and the treatment unit operation unit 256 can be connected, and this connection state can be maintained.

(Additional item 1)
The first connecting means includes a short tube coil portion formed in a winding shape, and a convex portion provided so as to protrude in the radial direction and insertable between the windings of the short tube coil portion. The endoscope treatment tool according to any one of claims 1 to 3, wherein the endoscope treatment tool is provided.
The endoscope treatment tool is configured to wind the convex portion by rotating the treatment portion main body in the winding direction with respect to the advancing / retreating driving force transmitting means from a state in which the convex portion and the short tube coil portion are in contact with each other. It can be inserted between the windings of the short tube coil portion along the line, and the treatment portion main body and the advance / retreat driving force transmission means can be connected by rotational movement around the axis.

(Appendix 2)
The endoscopic treatment instrument according to claim 1, wherein the short tube coil portion is a distal end portion of the advance / retreat driving force transmission means.
This endoscope treatment tool can directly engage the advancing / retreating driving force transmitting means and the convex portion, and can reduce the number of parts.

(Additional Item 3)
The first connecting means has a first coil portion formed in a winding shape, and is formed in a winding shape in the same direction as the first coil portion, and can be screwed into the first coil portion. The endoscopic treatment tool according to any one of claims 1 to 3, further comprising a second coil portion.
The endoscope treatment tool is configured such that the treatment coil main body and the advancing / retreating driving force transmitting means are relatively rotated from a state in which the first coil portion and the second coil portion are in contact with each other. The portion can be screwed along the winding of the first coil portion, and the treatment portion main body and the advance / retreat driving force transmitting means can be connected by rotational movement about the axis.

(Appendix 4)
It is provided with an inner pressing portion that is provided so as to be able to advance and retract within the advancing / retreating driving force transmitting means, and is formed so as to be in press contact with the inner peripheral surface of either the first coil portion or the second coil portion. The treatment instrument for an endoscope according to appendix 3, wherein:
In this endoscope treatment instrument, after the first coil part and the second coil part are screwed together, either the first coil part or the second coil part screwed inwardly is used. By pressing outward in the radial direction by the internal pressing portion, the screwed state between the first coil portion and the second coil portion can be more strongly maintained.

(Appendix 5)
The second connecting means is provided on a disk part connected to either one of the distal end of the driving force transmitting means or the proximal end of the treatment part on the side surface and the other one, and stores the disk part A columnar portion having a possible cavity portion, and a slit having an opening width larger than a plate width of the disk portion and smaller than a diameter and capable of guiding the disk portion to the cavity portion; The endoscopic treatment tool according to claim 3, wherein the endoscope treatment tool is provided.

  In this endoscope treatment tool, the treatment portion main body and the advance / retreat driving force transmission means are brought into contact with the columnar portion in a state where the direction of the disk portion can be inserted into the slit, and the advance / retreat driving force transmission means is further treated. When approaching the part main body in the axial direction, the disk part passes through the slit and is inserted into the cavity part. When the forward / backward driving force transmission means is further moved in the axial direction, the convex portion is guided by the spiral groove, and one of the tubular portion and the short tube portion rotates with respect to the other, and at the same time, the disc portion is diametrically within the hollow portion. Rotate in the direction around the axis of rotation. At this time, since the width direction of the slit and the thickness direction of the disc portion are shifted, the disc portion is restricted from returning into the slit again, and the driving force transmitting means and the treatment portion can be connected.

(Appendix 6)
A plurality of window portions, the first connection means extending in the axial direction and connected to the tip of the advance / retreat driving force transmission means, and formed at intervals in the circumferential direction of the central portion of the tubular side surface; A leg piece having a central portion pivotably supported about an axial axis and a vertical axis and having a jaw provided on the inner peripheral surface of the distal end; and a base end side of the window portion toward the window portion. And a short tube portion having a leaf spring portion with a distal end immersed radially inward from the proximal end of the leg piece portion, and protruding in the axial direction from the proximal end of the treatment portion main body into the short tube portion The endoscope according to claim 7, further comprising: a tubular portion that is provided so as to be fitted and has a concave portion that is engageable with the jaw portion in a circumferential direction of the proximal outer peripheral surface. Treatment tool.

This endoscopic treatment tool has a jaw portion at the proximal end of the tubular portion by approaching the treatment portion main body and the advancing / retreating driving force transmitting means in the axial direction from a state in which the tubular portion and the short tube portion are in contact with each other. Is pushed, and the distal end side of the leg piece can be rotated radially outward.
On the other hand, since the base end side of the leg piece portion rotates radially inward, the tubular portion can be fitted into the short tube portion while the leaf spring portion is further elastically deformed and bent radially inward. .
When the tubular portion is moved into the short tube portion to a position where the concave portion and the jaw portion are engaged, there is no force to maintain the distal end of the leg piece portion in the radially outward position as the concave portion and the jaw portion are engaged. As the base end of the leg piece is rotated and moved radially outward by the restoring force of the leaf spring, the tip of the leg piece is rotated and moved radially inward, and the relationship between the jaw and the recess is The combined state can be maintained by the leaf spring portion. Therefore, the treatment portion main body and the advance / retreat driving force transmission means can be connected by movement in the axial direction.

(Appendix 7)
A concave portion or a convex portion is formed in the circumferential direction of the outer peripheral surface or inner peripheral surface of the short tube portion, and the inner peripheral surface or outer peripheral surface of the leg piece portion can be fitted to the outer peripheral surface or inner peripheral surface of the short tube portion. The endoscopic treatment tool according to claim 12, wherein a convex portion or a concave portion engageable with the concave portion or the convex portion is provided on an inner peripheral surface of a free end.

  In this endoscope treatment tool, when the treatment portion main body and the advancing / retreating driving force transmitting means are approached in the axial direction from the state in which the tubular portion and the short tube portion are in contact with each other, the convex portion is formed by the outer peripheral surface of the short tube portion. The leg piece can be fitted into the outer peripheral surface of the short tube portion by being pushed radially outward. And if a convex part and a recessed part move to the position which mutually engages, a leg piece part will be returned to radial inner direction with its own restoring force, and a convex part and a recessed part can be engaged. Therefore, the treatment portion main body and the advance / retreat driving force transmission means can be connected by a one-way operation in the axial direction.

(Appendix 8)
Provided with a restricting portion that is provided so as to be able to advance and retreat with respect to the advancing / retreating driving force transmitting means and restricts deformation of the leg piece portion in the radial direction in a fitted state between the short pipe portion and the leg piece portion. The treatment instrument for an endoscope according to appendix 7, characterized by:
This endoscopic treatment tool can suppress the deformation of the leg piece portion in the radial direction after the short tube portion and the leg piece portion are fitted, and the engagement state between the convex portion and the concave portion is more strongly maintained. Thus, the fitting between the leg piece portion and the short tube portion can be maintained.

(Appendix 9)
The first connecting means is connected to the distal end of the advancing / retreating driving force transmitting means or the proximal end of the treatment portion main body, and a short pipe portion formed with a convex portion protruding radially from a side surface;
Provided on the proximal end side of the treatment portion main body or the distal end side of the forward / backward driving force transmission means, and can be fitted to the convex portion side surface of the short tube portion, and the convex portion can be immersed in the fitting surface. The endoscopic treatment tool according to claim 7, further comprising a receiving portion having an elastic portion having flexibility.

  When the treatment instrument for an endoscope is approached in the axial direction from a state where the treatment section main body and the advancing / retreating driving force transmitting means are in contact with each other, the convex section advances toward the receiving section while compressing the elastic section. The elastic part after passing the part can be restored to its original state by its own restoring force, and the treatment part main body and the advancing / retreating driving force transmitting means can be fitted. Therefore, the treatment portion main body and the advance / retreat driving force transmission means can be connected by a one-way operation in the axial direction.

(Appendix 10)
The second connecting means is connected to the spherical portion provided at the proximal end of the treatment section or the distal end of the driving force transmission means, and the distal end of the driving force transmission means or the proximal end of the treatment section, and is connected to the inside. A recess capable of accommodating a spherical portion, and a biasing force that is closed and enlarging from a width smaller than the outer diameter of the spherical portion to a size exceeding the outer diameter. An endoscopic treatment instrument according to any one of claims 7 to 11 or any one of appendixes 6 to 9, further comprising a gripping part having a slit to be communicated. .

  When this endoscopic treatment tool is approached in the axial direction from a state where the spherical portion and the gripping portion are in contact with each other, the spherical portion can be inserted into the slit while increasing the width of the slit of the gripping portion. Then, when the concave portion is reached, the slit width is restored to the original width by the closing bias of the slit, and the spherical portion can be stored in the concave portion. Therefore, it is possible to connect the driving force transmission means and the treatment portion by a one-way operation in the axial direction of the treatment portion main body.

It is sectional drawing of the side which shows the treatment tool for endoscopes of the endoscope treatment system which concerns on the 1st Embodiment of this invention. 1 is a side view including a partial cross section illustrating an endoscope of an endoscope treatment system according to a first embodiment of the present invention. It is explanatory drawing which shows the operating method of the treatment tool for endoscopes which concerns on the 1st Embodiment of this invention. It is explanatory drawing (a) which shows the endoscope treatment system which concerns on the 2nd Embodiment of this invention, the treatment units (b) of an endoscope treatment tool, (c), and sectional drawing which shows a forceps channel. It is explanatory drawing which shows the operation method of the endoscope treatment system which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the side surface which shows the treatment tool for endoscopes of the endoscope treatment system which concerns on the 3rd Embodiment of this invention. It is explanatory drawing which shows the operating method of the endoscope treatment system which concerns on the 3rd Embodiment of this invention. It is a side view including the partial cross section which shows the treatment tool for endoscope (a) of the endoscope treatment system which concerns on the 4th Embodiment of this invention, and an endoscope (b). It is explanatory drawing which shows the operating method of the endoscope treatment system which concerns on the 4th Embodiment of this invention. It is a side view which shows the treatment tool for endoscope (a) of the endoscope treatment system which concerns on the 5th Embodiment of this invention, and explanatory drawing which shows the operation method (b) (c). It is a side view which shows the treatment tool for endoscope (a) of the endoscope treatment system which concerns on the 6th Embodiment of this invention, and explanatory drawing which shows the operation method (b) (c). It is a side view which shows the treatment tool for endoscope (a) of the endoscope treatment system which concerns on the 7th Embodiment of this invention, and explanatory drawing which shows the operation method (b) (c). It is sectional drawing which shows the side surface of the treatment tool for endoscopes (a) of the endoscope treatment system which concerns on the 8th Embodiment of this invention, and explanatory drawing which shows the operation method (b). It is sectional drawing which shows the side surface of the treatment tool for endoscopes of the endoscope treatment system which concerns on the 9th Embodiment of this invention. It is a side view which shows the treatment tool for endoscopes of the endoscope treatment system which concerns on the 10th Embodiment of this invention. It is sectional drawing which shows the side surface of the treatment tool for endoscopes of the endoscope treatment system which concerns on the 11th Embodiment of this invention. It is sectional drawing (a) which shows the side surface of the treatment tool for endoscopes of the endoscope treatment system which concerns on the 12th Embodiment of this invention, and explanatory drawing which shows the operation method (b). It is sectional drawing (a) which shows the side surface of the treatment tool for endoscopes of the endoscope treatment system in the other example which concerns on the 12th Embodiment of this invention, and explanatory drawing which shows the operation method (b). It is sectional drawing (a) which shows the side surface of the endoscope treatment system which concerns on the 13th Embodiment of this invention, and explanatory drawing which shows the operation method (b). It is sectional drawing (a) which shows the side surface of the treatment tool for endoscopes of the endoscope treatment system which concerns on 14th Embodiment of this invention, and explanatory drawing which shows the operation method (b). It is sectional drawing (a) which shows the side surface of the treatment tool for endoscopes of the endoscope treatment system which concerns on 15th Embodiment of this invention, and explanatory drawing which shows the operation method (b). It is side view (a) (b) which shows the treatment tool for endoscopes of the endoscope treatment system which concerns on 16th Embodiment of this invention, and explanatory drawing which shows the operation method (b) by showing a cross section. . It is sectional drawing which shows the side surface of the treatment tool for endoscopes of the endoscope treatment system which concerns on other embodiment of this invention. It is a side view including the partial cross section which shows the treatment tool for endoscopes of the endoscope treatment system which concerns on other embodiment. It is a perspective view which shows the treatment tool for endoscopes of the endoscope treatment system which concerns on other embodiment.

Explanation of symbols

1, 50, 60, 76, 80, 90, 95, 115, 131, 141, 150, 161, 173, 187, 198, 211, 231 Endoscopic treatment tool 2, 61, 83 Endoscope 3, 67 69, 88, 113, 127, 140, 148, 160, 170, 185, 195, 207, 227, 233 Endoscopic treatment system 5, 62, 68 Forceps channel 6 Treatment section 7, 53, 100, 117, 146 166, 176, 203, 212 Treatment unit body 8, 59, 78, 94, 98, 132, 142, 186, 196, 208, 228 Treatment unit 10 Driving force transmission means 11 Advance / retreat driving force transmission means 12, 64, 82 97, 130, 151, 182, 197, 210, 230 Treatment unit operation unit 13, 51, 81, 91, 96, 116, 162, 175, 18 8, 200, 220 First connection means 15, 56, 106, 223 Second connection means 21 Mantle tube 22 Operation wire (operation member)
25, 52, 105, 123, 143, 152, 165, 181, 202 Short pipe part 26 Spiral groove 27, 66, 86 Convex part 28, 85, 92, 126, 133, 192 Tubular part 52a Female thread groove 55 1 protrusion (protrusion)
55a Male thread groove 63, 67A, 69A Rotating means 65 Guiding path 70 Rotating drive part 83 Short tube coil part 101, 120, 138, 156, 177 Jaw part 102, 118, 157, 167, 178, 191 Leg piece part 103 1 recess (recess)
122 Holding part 125 Concave part 136 Partition member 137 Small concave part 145 Convex part 147 Convex part 213 First notch part 215 First short pipe part 217 Second notch part 218 Second short pipe part 221 First convex part 222 1st recessed part 225 2nd recessed part 226 2nd convex part

Claims (19)

An endoscopic treatment instrument that is inserted into the forceps channel of an endoscope,
A treatment unit that receives a driving force from the outside and performs treatment on the target site;
A treatment unit having a treatment portion body that supports the treatment portion and is capable of moving back and forth in the forceps channel;
Driving force transmitting means for transmitting the driving force to the treatment section;
A treatment unit operation unit having an advancing / retreating driving force transmitting means for transmitting a longitudinal driving force of the forceps channel to the treatment unit body;
After positioning the treatment unit with respect to the treatment unit operation unit, either the treatment unit or the treatment unit operation unit is moved relative to the other in one direction to move the treatment unit main body and the advance / retreat driving force. First connection means for connecting the transmission means;
An endoscopic treatment tool comprising: a second connection unit that connects the treatment unit and the driving force transmission unit based on the relative movement. The advance / retreat driving force transmission means is an outer tube formed in a tubular shape,
The endoscopic treatment instrument according to claim 1, wherein the driving force transmitting means is an operation member formed in a linear shape and capable of moving forward and backward in the outer tube.   3. The internal view according to claim 1, wherein the first connection unit is a unit that rotates and moves the treatment portion main body around an axis with respect to the advance / retreat driving force transmission unit. Mirror treatment tool. The first connecting means includes a short tube portion in which a spiral groove is formed from the distal end toward the proximal end;
A tubular portion provided with a convex portion that can be fitted into the short tube portion and protrudes in the radial direction and engageable with the spiral groove is provided. The endoscope treatment tool according to any one of the above. The first connecting means includes a short tube portion in which either one of a thread groove or an internal thread groove is formed on the outer peripheral surface;
2. A projecting portion, wherein either an internal thread groove is formed on an inner peripheral surface or a thread groove is formed on an outer peripheral surface, and is formed so as to be screwable with the short pipe portion. The endoscope treatment tool according to any one of 3 above. The second connecting means is provided with either a female thread groove on the inner peripheral surface or a thread groove on the outer peripheral surface and provided at either the distal end of the driving force transmitting means or the proximal end of the treatment portion. A columnar portion,
A projecting portion provided on the other side and formed to be screwable with the columnar portion;
6. The endoscope for an endoscope according to claim 3, wherein the female screw groove and the male screw groove are formed in the same direction as a screwing direction of the first connecting means. Treatment tool.   3. The internal connection according to claim 1, wherein the first connection unit is a mechanism that makes the advance / retreat driving force transmission unit approach each other in the axial direction with respect to the treatment portion main body to connect each other. Endoscopic treatment tool. The first connecting means is connected to a proximal end of the treatment portion main body or a distal end of the advance / retreat driving force transmitting means, and a short pipe portion having a spiral groove formed on a side surface from the other end toward the one end side. ,
A tubular portion provided with a convex portion that can be fitted into the short tube portion and protrudes in the radial direction and engageable with the spiral groove;
8. The internal view according to claim 7, wherein the tubular portion or the short tube portion is supported by any one of the treatment portion main body and the advance / retreat driving force transmission means so as to be rotatable around a central axis. Mirror treatment tool. The first connecting means extends in the axial direction to form a part of a tubular side surface, and the end on the side where the advance / retreat driving force transmitting means and the treatment portion main body are opposed to each other is a free end. A leg piece that can be bent into
A short tube having a jaw portion formed on the inner peripheral surface of the free end side of the leg piece portion and a ring-shaped pressing portion slidable by being urged in the axial direction on the outer peripheral surface of the leg piece portion. And
The endoscopic treatment tool according to claim 7, further comprising: a tubular portion formed on an outer peripheral surface so as to be engageable with the jaw portion and capable of being fitted into the short tube portion. . The recess is partitioned into a plurality of small recesses in the circumferential direction by a plurality of partition members,
The endoscopic treatment tool according to claim 9, wherein the jaw is formed to be engageable with one of the small recesses.   A concavo-convex portion is formed on one facing surface of either the distal end of the advance / retreat driving force transmission means or the base end of the treatment portion main body, and a concavo-convex portion engageable with the concavo-convex portion is formed on the other facing surface. The endoscopic treatment tool according to claim 9. The first connecting means is a short tube portion provided at the distal end of the advance / retreat driving force transmitting means or the proximal end of the treatment portion main body;
A leg that extends in the axial direction from the proximal end of the treatment portion main body or the distal end of the advance / retreat driving force transmission means, and has a free end that can be bent in the radial direction, and can be fitted to the inside or outside of the short tube portion. The endoscopic treatment tool according to claim 7, wherein the endoscopic treatment tool is a snap-fit mechanism including a single portion. The second connecting means has a columnar part provided at the tip of the driving force transmitting means with either an internal thread groove formed on the inner peripheral surface or a thread groove formed on the outer peripheral surface;
A thread groove on the outer peripheral surface or a female thread groove on the inner peripheral surface is formed, and includes a projecting portion that is formed so as to be screwable with the columnar portion and provided on the proximal end side of the treatment portion,
The male thread groove and the female thread groove are formed in the same direction as the screwing direction of the first connecting means;
The endoscopic treatment tool according to claim 8, wherein the protruding portion is rotatable about an axis in the same direction as the tubular portion. The front end of the advance / retreat driving force transmission means or the proximal end of the treatment section main body has a first notch that allows the proximal end of the treatment section main body or the front end of the advance / retreat drive force transmission means to be inserted from the outside in the radial direction. A first short tube formed on a part of the surface is provided;
A second cutout portion into which the proximal end of the treatment section or the distal end of the drive force transmission means can be inserted from the radially outer side at the distal end of the driving force transmission means or the proximal end of the treatment section is a part of the outer peripheral surface. A second short tube portion formed in
The first connecting means is a first convex portion formed at least partially along the circumferential direction of the inner peripheral surface including the first notch,
A first recess that is formed along a circumferential direction of the treatment section main body or the advance / retreat driving force transmission means and is engageable with the first protrusion;
A second protrusion formed on at least a portion of the circumferential direction of the inner peripheral surface including the second notch, the second connecting means;
A second recess formed along the circumferential direction of the outer peripheral surface of the treatment section or the driving force transmission means and engageable with the second protrusion;
The endoscopic treatment tool according to claim 1 or 2, wherein a cutout direction of the first cutout portion and the second cutout portion is substantially the same direction. An endoscope,
The endoscope treatment tool according to any one of claims 1 to 6, which is used together with the endoscope.
An endoscope treatment system, wherein a rotation means capable of rotating the treatment portion main body around a central axis with respect to the forceps channel is disposed. The rotating means is a spiral guide path provided on the outer peripheral surface of the treatment portion body;
The endoscope treatment system according to claim 15, further comprising a convex portion that is engageable with the guide path and protrudes radially inward from an inner peripheral surface of the forceps channel. The rotating means is a spiral guide path provided on the inner peripheral surface of the forceps channel;
The endoscope treatment system according to claim 15, further comprising a convex portion that is engageable with the guide path and protrudes radially outward from an outer peripheral surface of the treatment portion main body.   The endoscope treatment system according to claim 15, wherein the rotation means includes a rotation drive unit provided on an inner peripheral surface of the forceps channel. An endoscope,
The endoscope treatment tool according to any one of claims 7 to 12, which is used together with the endoscope.
An endoscope treatment system, wherein the endoscope includes an automatic insertion / removal mechanism capable of moving the treatment unit operation unit back and forth in the forceps channel.

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