JPH1071155A - Treating implement for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily disassemble and assemble a treating part driving unit and to facilitate the washing, etc., in an insertion section by attachably and detachably providing the treating implement with a sheath unit and treating section driving unit constituting the shell part of the insertion section and installing means for regulating the axial movement and rotation of the operating shaft of this sheath unit. SOLUTION: At the time of assembling the treating implement 1 for an endoscope, the rotation regulating member 33 is inserted into a washing port 19 and the engaging pawl part 34 of this member 33 is engaged with the notched surface 32 of the rotation regulating section of the treating section driving unit 13. As a result, the axial rotation and axial movement of the operation shaft 10 between the sheath unit 12 and the driving unit 13 are regulated. On the other hand, the disassembly of the treating implement 1 for the endoscope is executed by first removing the rotation regulating member 33 from the washing port 19, then rotating the driving unit 13 in the direction opposite to the direction at the time of assembly relative to the sheath unit 12 and disengaging the two engaging pawls 26 of the driving unit 13 and the detaining groove part of the sheath unit 12, then operating the driving unit 13 to remove the unit forward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment tool for an endoscope used in an operation under an endoscope.

[0002]

2. Description of the Related Art A medical device of this type is disclosed in German Utility Model Publication G 92 15 053.5. In this case, a treatment member that can be opened and closed is disposed on the distal end side of an insertion portion that is inserted into a living body. Further, a proximal operation unit is connected to a base end of the insertion unit. This operation unit is provided with a fixed handle and a movable handle. Further, an operation shaft of the treatment member is provided in the insertion portion so as to be able to advance and retreat. And
The operation shaft is moved forward and backward in response to the opening and closing operation of the movable handle of the operation unit, and the treatment member is opened and closed in accordance with the movement of the operation shaft.

Further, in this prior art, a treatment member at a distal end of a treatment instrument is detachably connected to a main body of an insertion portion. With this configuration, when cleaning and sterilizing the treatment tool, only the treatment member at the distal end can be removed from the main body of the insertion section.

Japanese Patent Application Laid-Open No. Hei 7-31623 also discloses a configuration in which a treatment member at the distal end of a treatment tool is detachably connected to a main body of an insertion portion. Further, in this prior art, a cleaning port is provided at the base end of the main body of the insertion portion.

In this prior art configuration, the distal end is removed from the main body of the insertion section when the treatment tool is washed and sterilized, and the main body of the insertion section is removed from the cleaning port at the base end of the main body of the insertion section. The washing liquid can be supplied to the inside.

[0006]

[Problems to be Solved by the Invention] German Utility Model Publication G
In 92 15 053.5, the operating shaft of the treatment member is attached to the main body of the insertion section in a state where it cannot be removed. Therefore, since the operation shaft of the treatment member cannot be removed from the main body of the insertion portion, even if only the treatment member at the distal end portion is removed from the main body of the insertion portion, the inside of the main body of the insertion portion cannot be sufficiently washed. There's a problem. Furthermore, when the operation shaft is damaged, only the damaged operation shaft cannot be replaced, so that it takes a long time to repair the treatment tool.

In Japanese Patent Laid-Open Publication No. Hei 7-31623, a cleaning port is provided at the base end of the main body of the insertion portion, and the cleaning liquid is supplied from the cleaning port into the main body of the insertion portion. Although the cleaning property of the insertion part was somewhat improved, it was not yet sufficient. Further, also in this case, since the operation shaft of the treatment member is assembled to the main body of the insertion portion in a state where it cannot be removed, there is a problem that when the operation shaft is damaged, only the damaged operation shaft cannot be replaced. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to easily disassemble and assemble a treatment section drive unit integrally assembled with a treatment member opening / closing drive mechanism from a treatment instrument main body. Thus, there is provided a treatment tool for an endoscope which can improve washing and sterilization of the inside of an insertion portion, and can cope with breakage of an operation shaft by replacing a treatment portion drive unit. Is to do.

[0009]

According to the present invention, a treatment member which can be opened and closed is disposed at a distal end side of an insertion portion to be inserted into a living body, and a proximal operation portion is connected to a base end portion of the insertion portion. And an opening / closing drive mechanism for operating the treatment member in the insertion portion so as to advance and retreat, and for opening and closing the treatment member by moving the operation shaft forward and backward in response to the operation of the operation portion. In a treatment tool for an endoscope, a sheath unit constituting an outer shell of the insertion section and a treatment section drive unit integrally incorporating the opening / closing drive mechanism of the treatment member are detachably provided. Along with an axial movement restricting means for restricting axial movement of the operation shaft in the sheath unit, and an axial rotation restriction means for restricting rotation of the operation shaft in the sheath unit in the axial direction. It is a treatment instrument for endoscope, characterized in that provided. With the above configuration, by removing the treatment section drive unit from the sheath unit, the inside of the insertion section can be effectively washed and sterilized,
When the operation shaft is damaged, the treatment unit drive unit is removed from the sheath unit, so that only the damaged operation shaft inside the insertion portion can be easily replaced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4A and 4B. FIG. 1 shows a schematic configuration of an endoscope treatment tool 1 according to the present embodiment. In the treatment tool 1 for an endoscope according to the present embodiment, a proximal operation portion 3 is connected to a proximal end of an insertion portion 2 to be inserted into a living body.

A treatment section 4 is provided at the distal end of the insertion section 2. The treatment section 4 is provided with a pair of treatment members 5 and 5 that can be opened and closed. Further, the operating section 3 is provided with a fixed handle 6 and a movable handle 7.
Here, the movable handle 7 is rotatably connected to the fixed handle 6 via a rotation shaft 8.

The insertion section 2 is provided with an elongated cylindrical sheath 9. An operation shaft 10 for the treatment members 5 and 5 is disposed inside the sheath 9 so as to be able to advance and retreat.
Further, the endoscope treatment tool 1 of the present embodiment has an opening / closing drive mechanism 11 (see FIG.
(See (B)). Then, in response to a rotation operation of rotating the movable handle 7 with respect to the fixed handle 6 of the operation unit 3, the operation shaft 10 is caused to advance and retreat in the axial direction of the insertion unit 2. Accordingly, the opening and closing drive mechanism 11 drives the treatment members 5 and 5 to open and close.

Further, the treatment tool 1 for an endoscope according to the present embodiment is provided with a sheath 9 constituting an outer shell of the insertion section 2 as shown in FIG.
A treatment unit drive unit 13 shown in FIG. 2B in which a sheath unit 12 shown in FIG. 2A and an opening / closing drive mechanism 11 for treatment members 5 and 5 are integrally assembled, and FIG.
An operation unit 14 shown in FIG.

As shown in FIG. 2C, the fixed handle 6 of the operation unit 14 is provided with a handle body 6a bent in a substantially L-shape. The turning shaft 8 of the movable handle 7 is disposed at the L-shaped bent portion of the handle main body 6a.

The handle body 6a of the fixed handle 6
2C, a ring 6b for inserting a finger is formed at the lower end. Further, a sheath connecting member 15 to which the sheath unit 12 is detachably connected is provided at an upper end of the handle main body 6a.

The handle body 7a of the movable handle 7
2C, a ring 7b for inserting a finger is formed at the lower end. Further, an operation shaft connecting portion 29 to which the operation shaft 10 of the treatment section drive unit 13 is detachably connected is provided at an upper end portion of the handle main body 7a.

The sheath unit 12 is provided with a connecting portion 16 for connecting to the operation unit 14 at the base end of the sheath 9. The connection portion 16 is provided with a handle connection portion 17 detachably connected to the sheath connection member 15 of the fixed handle 6 of the operation portion unit 14, a rotation knob 18, and a cleaning port 19.

The washing port 1 of the sheath unit 12
9 is configured as shown in FIGS. 4 (A) and 4 (B).
That is, an opening 20 is formed at the base end of the sheath 9 in a direction orthogonal to the axial direction of the sheath 9. Further, a cylindrical exterior body 21 is mounted on the outer peripheral surface on the base end side of the sheath 9. Further, a cylindrical cleaning port 19 is protruded from the outer peripheral surface of the exterior body 21. The inner end of the cleaning port 19 communicates with the opening 20 of the sheath 9. The insulating member 9 is provided on the outer peripheral surface side of the sheath 9.
a may be attached to form a double cylindrical structure. Further, the cleaning port 19 may be luer-locked or other shapes.

As shown in FIG. 3A, a cylindrical connecting member 22 detachably connected to the treatment section drive unit 13 is provided on the inner peripheral surface of the distal end of the sheath 9 of the sheath unit 12.
Has been fixed. As shown in FIG. 3A, a substantially L-shaped locking groove 23 is formed in the connecting member 22 on each of the opposed wall surfaces of the cylinder of the connecting member 22. These locking grooves 23 have linear guide grooves 23a extending in the axial direction of the sheath 9 from the distal end openings, and the guide grooves 23a.
And a locking groove 23b bent in a direction perpendicular to the axial direction of the sheath 9 from the terminal end of the sheath 9. Lock groove 23
May be one or three or more.

The treatment section drive unit 13 is provided with an operation shaft 10 for treatment members 5 and 5. This operation axis 1
A holding member 24 that constitutes the opening and closing drive mechanism 11 for the treatment members 5 and 5 is disposed at the distal end of the reference numeral 0. This holding member 2
At least one of the two treatment members 5 and 5 is rotatably connected to 4. The treatment members 5 and 5 can be opened and closed by moving the operation shaft 10 back and forth along the axial direction of the operation shaft 10. In the present embodiment, the treatment members 5 and 5 have a forceps shape suitable for grasping a living tissue, but may have another shape, for example, scissors shape.

Further, a connecting portion 25 to the sheath unit 12 is provided at a rear end of the holding member 24. The connecting portion 25 is provided with two bayonet mechanism type locking claws 26. These locking claws 26 are attached to the sheath unit 1.
The two connecting members 22 are inserted into the two locking grooves 23 so as to be able to be inserted and removed, respectively. The operating shaft 1 between the sheath unit 12 and the treatment unit drive unit 13 is formed by the two engagement claws 26 of the treatment unit drive unit 13 and the two engagement grooves 23 of the connecting member 22 of the sheath unit 12.
A bayonet-type locking mechanism (axial movement restricting means) 27 for restricting the movement in the 0 axial direction is configured. The number of the locking claws 26 may be one, or three or more. In addition,
In the present embodiment, the configuration in which the bayonet mechanism-type locking mechanism 17 is provided as the axial movement restricting means is shown, but a structure other than the bayonet mechanism, for example, a screw-type locking mechanism may be used.

The operating shaft 1 of the treatment section drive unit 13
0, a connecting portion 2 of the operating portion 3 with the movable handle 7
8 are provided. The connection portion 28 is provided with a connection ball 30 detachably connected to the operation shaft connection portion 29 of the movable handle 7. The operating shaft connecting portion 29 of the movable handle 7 has an operating shaft 10 of the treatment section drive unit 13.
An engagement groove is formed in which the connection ball 30 is detachably engaged.

The operating shaft 10 has a sheath unit 12
A rotation restricting unit (rotation control unit around the axis) 3 that restricts rotation of the operation shaft 10 in the sheath unit 12 when the treatment unit drive unit 13 and the treatment unit drive unit 13 are assembled.
1 is provided. This rotation regulating portion 31 is shown in FIG.
As shown in FIG. 1, the outer peripheral surface of the operation shaft 10 is formed by two parallel notched surfaces 32 which are cut out in a plane. Then, when the sheath unit 12 and the treatment section drive unit 13 are assembled, the rotation regulating section 31 is arranged at a position corresponding to the cleaning port 19 as shown in FIG. 4A.

The cleaning port 1 of the sheath unit 12
9 includes a rotation restricting member (rotation restricting means around the axis) 33.
Is removably inserted. Here, the cleaning port 19
Is formed with a tapered surface on its inner peripheral surface. Further, a tapered surface is also formed on the outer peripheral surface of the rotation restricting member 33. When the rotation restricting member 33 is inserted into the cleaning port 19, the tapered surface of the rotation restricting member 33 is pressed against the tapered surface of the cleaning port 19 so that the two members are fixed and airtight. . The cleaning port 19
A seal member (not shown) may be attached to one or both of the inner peripheral surface and the outer peripheral surface of the rotation restricting member 33 to maintain airtightness.

The tip of the rotation restricting member 33 is shown in FIG.
As shown in (B), a substantially U-shaped engaging claw portion 34 is formed. The engaging claw 34 of the rotation restricting member 33 inserted into the cleaning port 19 is
2 to regulate the rotation of the operation shaft 10 around the axis between the sheath unit 12 and the treatment section drive unit 13.

A pin insertion hole 35 is formed in the washing port 19 as shown in FIG. The pin insertion hole 35 has a positioning pin 36 for the rotation restricting member 33.
Is inserted.

Further, an engagement groove 3 extending in the axial direction of the rotation regulating member 33 is formed on the outer peripheral surface of the shaft portion of the rotation regulating member 33.
7 are formed. The tip of the positioning pin 36 is inserted into the engagement groove 37. Then, the engagement groove 37 of the rotation regulating member 33 and the positioning pin 36 of the cleaning port 19 are provided.
The rotation position of the rotation restricting member 33 in the direction around the axis is regulated by the engagement portion with the engaging claw 34 of the rotation restricting member 33.
And the two cutout surfaces 32 of the rotation restricting portion 31 of the treatment section drive unit 13 can be positioned.

The cleaning port 19 and the rotation restricting member 33
The cross-sectional shape of the rotation restricting member 33 may be, for example, a quadrangle so that the rotation restricting member 33 cannot rotate with respect to each other. Further, the positioning mechanism of the rotation restricting member 33 such as the positioning pin 36 of the present embodiment does not necessarily need to be provided. Even when the positioning mechanism such as the positioning pin 36 is not provided, the rotation restricting member 33 functions sufficiently.

Then, the treatment tool 1 for an endoscope according to the present embodiment
Now, the sheath unit 12 and the treatment unit drive unit 13
And the operation unit 14 are detachably attached to each other, and are used in this assembled state.

Next, the operation of the above configuration will be described.
First, a method of assembling the sheath unit 12, the treatment unit drive unit 13, and the operation unit 14 of the endoscope treatment tool 1 according to the present embodiment will be described.

At the time of assembling the treatment tool 1 for an endoscope according to the present embodiment, first, the handle connecting portion 17 of the sheath unit 12 is inserted into the sheath connecting member 15 of the fixed handle 6 of the operation unit 14, and the sheath unit 12 and the sheath unit 12 are connected. Operation unit 1
4 is assembled. At this time, the handle connecting portion 17 of the sheath unit 12 and the sheath connecting member 15 of the fixed handle 6 are connected.
The sheath unit 12 is rotatably held by the fixed handle 6 by the connecting portion with the above. The sheath unit 12
The fixed handle 6 of the operation unit 14 may be integral with the fixed handle 6 or may not be rotatable.

After assembling the sheath unit 12 and the operation unit 14, the treatment unit drive unit 13 is moved from the connecting ball 30 at the rear end to the sheath 9 of the sheath unit 12.
Insert inside. At this time, the connection ball 30 side of the treatment section drive unit 13 extends outward from the handle connection section 17 of the sheath unit 12. The connecting ball 30 of the treatment section drive unit 13 is connected to the operation shaft connecting portion 29 of the movable handle 7.

Further, at the time of assembling the treatment section drive unit 13, the two locking claws 26 of the treatment section drive unit 13 are inserted into the two locking grooves 23 of the connecting member 22 of the sheath unit 12. At this time, the two locking claws 26 move rearward along the linear guide groove portions 23a of the two locking grooves 23. Then, the two locking claws 26 are engaged with the locking groove 2.
In a state where the treatment section drive unit 13 is inserted into the sheath 9 of the sheath unit 12 until the treatment section drive unit 13 and the sheath unit 12
Are relatively rotated along the locking groove 23b to lock the two locking claws 26 in the locking groove 23b. Thereby, the treatment section drive unit 13 and the sheath unit 12 can be fixed in a state where the movement of the operation shaft 10 in the axial direction is regulated.

The two locking claws 26 are connected to the locking groove 23b.
After that, the rotation restricting member 33 is inserted into the cleaning port 19. At the time of inserting the rotation restricting member 33 into the cleaning port 19, the positioning pin 36 of the cleaning port 19 is inserted into the engagement groove 37 of the rotation restricting member 33. Then, the rotation restricting member 3 is formed by an engaging portion between the engagement groove 37 of the rotation restricting member 33 and the positioning pin 36 of the cleaning port 19.
3, the rotational position in the direction around the axis is regulated. Therefore, the engagement claw 34 of the rotation restricting member 33 and the treatment section drive unit 1
The position between two notch surfaces 32 of the third rotation regulating portion 31 is positioned.

Then, as shown in FIG. 4B, the rotation restricting member 34 of the rotation restricting member 33 is restricted to a position where it is engaged with the two notches 32 of the rotation restricting portion 31 of the treatment section drive unit 13. When the member 33 is inserted into the cleaning port 19,
The operation of the operating shaft 10 between the sheath unit 12 and the treatment unit drive unit 13 is performed by an engagement portion between the engagement claw 34 of the rotation regulation member 33 and the two cutout surfaces 32 of the rotation regulation unit 31 of the treatment unit drive unit 13. The rotation around the axis is restricted. Thus, the operation of attaching the treatment section drive unit 13 to the assembly of the sheath unit 12 and the operation section unit 14 is completed.

The rotation restricting member 33 is provided for the cleaning port 19.
When it is inserted into the cleaning port 19, the tapered surface of the rotation regulating member 33 is pressed against the tapered surface of the cleaning port 19, and the fixing and airtightness between them are maintained.

When the sheath unit 12 and the operation unit 14 are assembled to the operation unit 14, the direction between the treatment unit drive unit 13 and the sheath unit 12 is the axial direction of the operation shaft 10 and the direction around the axis. Although the movement is regulated in both cases, only the movement of the operation shaft 10 in the rotation direction is regulated, and the operation shaft 10 is held movably in the axial direction of the operation shaft 10.

Therefore, when the movable handle 7 is rotated with respect to the fixed handle 6 of the operation unit 3 in a state where the sheath unit 12 and the operation unit 14 are assembled to the operation unit 14, the operation shaft 10 Move forward and backward in the axial direction of the insertion section 2, and the treatment members 5, 5 are moved via the opening / closing drive mechanism 11 in accordance with the axial movement of the operation shaft 10.
Is driven to open and close.

When the endoscope treatment tool 1 of the present embodiment is used, the rotation knob 18 of the sheath unit 12 is rotated, so that the treatment unit drive unit 13 is connected to the sheath unit 12 with respect to the operation unit 14. Can be rotated together.

Next, a method of disassembling the endoscope treatment tool 1 according to the present embodiment will be described. First, the rotation restricting member 3
3 is removed from the washing port 19. Subsequently, the treatment section drive unit 13 is rotated in the direction opposite to the direction in which the treatment section drive unit 13 is attached to the sheath unit 12, and the two locking claws 26 of the treatment section drive unit 13 are locked with the locking grooves 23 b of the sheath unit 12. Cancel. In this state, the treatment unit drive unit 13 is pulled out of the sheath unit 12 forward. At this time, by removing the treatment section drive unit 13 from the sheath unit 12, the connection state of the connection ball 30 of the treatment section drive unit 13 from the operation shaft connection section 29 of the movable handle 7 can be released at the same time.

After the treatment section drive unit 13 is removed from the sheath unit 12, the sheath unit 12 is pulled forward with respect to the fixed handle 6 of the operation section unit 14. At this time, with the operation of pulling the sheath unit 12 forward with respect to the fixed handle 6, the handle connecting portion 17 of the sheath unit 12 is removed from the sheath connecting member 15 of the fixed handle 6 of the operating portion unit 14, and The sheath unit 12 is separated.

Therefore, the above configuration has the following effects. That is, in the endoscopic treatment tool 1 of the present embodiment, the sheath unit 12 and the treatment section drive unit 13
And the operation unit 14 can be easily disassembled and assembled, so that the treatment unit drive unit 1
By removing 3, the operation of washing and sterilizing the inside of the insertion section 2 can be easily performed. Therefore, cleaning and sterilization of the inside of the insertion section 2 can be performed effectively in a short time as compared with the related art, so that the cleaning and sterilization properties of the inside of the insertion section 2 are improved.

Further, when the operation shaft 10 is broken, the treatment unit drive unit 13 is removed from the sheath unit 12 so that the damaged operation shaft 10 inside the insertion section 2 is removed.
Only can be easily replaced. Therefore, the repair time of the treatment tool 1 can be reduced.

By preparing a plurality of treatment section drive units 13, sheath units 12, and operation section units 14, a plurality of treatment instrument bodies can be configured in various combinations.

In this embodiment, the rotation restricting member 33 formed by a solid shaft is shown.
(A) and (B), as in the modification shown in FIG.
As shown in FIG. 5 (B), a conduit 38 is formed in the inside, and a cap 39 is attached to the head of the rotation restricting member 33 to openably close the conduit 38 and maintain airtightness. It may be configured.

When the conduit 38 is formed inside the rotation restricting member 33 as described above, the cap 39 of the rotation restricting member 33 attached to the cleaning port 19 is opened to operate the endoscope treatment tool 1. Can be supplied to the inside of the sheath 9 through the conduit 38 of the rotation restricting member 33 in the assembled state.

FIGS. 6 to 9A to 9C show a second embodiment of the present invention. In the present embodiment, the configuration of the endoscope treatment tool 1 of the first embodiment (see FIGS. 1 to 4A and 4B) is changed as follows. Most of the present embodiment has the same configuration as that of the first embodiment, and FIGS.
In (C), the same parts as those in FIGS. 1 to 4A and 4B are denoted by the same reference numerals, and the description thereof will be omitted.

That is, in the present embodiment, the substantially L-shaped locking groove 23 of the first embodiment is formed on the inner peripheral surface of the distal end portion of the sheath 9 of the sheath unit 12 on the opposed wall surface of the cylinder of the sheath 9 respectively. Directly formed. These locking grooves 23
A linear guide groove 23a extending in the axial direction of the sheath 9 from the distal end opening, and a locking groove bent from a terminal end of the guide groove 23a in a direction orthogonal to the axial direction of the sheath 9. 23b.

The two locking claws 26 of the treatment section drive unit 13 and the two lock grooves 23 of the sheath 9 of the sheath unit 12 are used to control the axis of the operating shaft 10 between the sheath unit 12 and the treatment section drive unit 13. Bayonet-type locking mechanism (axial movement restricting means) 2 for restricting movement in the direction
7 are configured.

As shown in FIGS. 9 (B) and 9 (C), a flange-shaped locking projection (luer lock) 41 is formed to be bent outward at the opening end of the cleaning port 19 of the sheath unit 12. I have. Further, in the present embodiment, a rotation restricting member 42 composed of a luer lock base shown in FIG. 9A is provided instead of the rotation restricting member 33 of the first embodiment.

The rotation restricting member 42 has a luer lock base 43, a shaft 44 disposed on the axis of the luer lock base 43, and the upper end of the shaft 44 can be freely rotated by the luer lock base 43. And a connection ring 45 connected to the connection ring.

A cylindrical projection 46 is provided below the luer lock base 43. A plurality of ring protrusions 47 which are detachably engaged with the locking protrusions 41 of the cleaning port 19 are arranged on the inner peripheral surface of the protrusion 46 in the axial direction of the shaft body 44.

Further, a substantially U-shaped engaging claw portion 48 is formed at the lower end of the shaft body 44. Then, as shown in FIG. 9C, the rotation restricting member 4 inserted into the cleaning port 19.
The two engaging claws 48 are engaged with the two notched surfaces 32 of the operation shaft 10, thereby restricting rotation of the operation shaft 10 around the axis between the sheath unit 12 and the treatment unit drive unit 13. ing.

Next, the operation of the above configuration will be described.
First, a method of assembling the sheath unit 12, the treatment unit drive unit 13, and the operation unit 14 of the endoscope treatment tool 1 according to the present embodiment will be described.

At the time of assembling the endoscope treatment tool 1 of the present embodiment, the sheath unit 1 is first inserted similarly to the first embodiment.
2 is inserted into the sheath connecting member 15 of the fixed handle 6 of the operation unit 14, and the sheath unit 12 and the operation unit 14 are assembled. The treatment section drive unit 13 is assembled to the assembled body in the same procedure as in the first embodiment.

During the assembling operation of the treatment section drive unit 13, the two locking claws 26 of the treatment section drive unit 13 are locked in the lock grooves 23 b of the sheath unit 12, so that the treatment section drive unit 13 and the sheath unit 12 And the operation axis 1
After fixing in a state where the movement in the axial direction of 0 is regulated, the rotation regulating member 42 is inserted into the cleaning port 19.

At the time of inserting the rotation restricting member 42 into the cleaning port 19, the engaging claw 48 of the rotation restricting member 42 is connected to the two rotation restricting portions 31 of the treatment section drive unit 13 as shown in FIG. When the rotation restricting member 42 is inserted into the cleaning port 19 to a position where the rotation restricting member 42 is engaged with the notch surface 32, the ring convex portion of the rotation restricting member 42 engages with the locking convex portion 41 of the cleaning port 19 at the inserted position. The rotation regulating member 42 is locked to the cleaning port 19 by 47. At this time, the engagement claw 48 of the rotation regulating member 42 and the treatment section drive unit 13
The rotation of the operation shaft 10 around the axis between the sheath unit 12 and the treatment unit drive unit 13 is regulated by the engagement portion of the rotation regulating portion 31 with the two cutout surfaces 32.

Note that the rotation restricting member 42 of this embodiment also has the positioning of the engaging groove 37 and the cleaning port 19 of the rotation restricting member 33 shown in FIGS. 4A and 4B shown in the first embodiment. A positioning mechanism such as a mechanism for engaging with the pin 36 may be provided, or a completely different positioning mechanism may be provided.

Then, the treatment tool 1 for an endoscope of the present embodiment
Can be used in a state where the sheath unit 12 and the operation unit 14 are assembled to the operation unit 14 in the same manner as in the first embodiment. Also, when disassembling the endoscope treatment tool 1 of the present embodiment, the operation is performed in the same procedure as in the first embodiment.

Therefore, in the endoscopic treatment tool 1 of the present embodiment having the above-described configuration, the sheath unit 12, the treatment section drive unit 13, the operation section unit 14, and the sheath unit 12, similarly to the first embodiment. Can be easily disassembled and assembled, so that by removing the treatment section drive unit 13 with respect to the sheath unit 12, the inside of the insertion section 2 can be easily cleaned and sterilized. Therefore, cleaning and sterilization of the inside of the insertion section 2 can be performed effectively in a short time as compared with the related art, so that the cleaning and sterilization properties of the inside of the insertion section 2 are improved.

In the endoscopic treatment tool 1 of the present embodiment, the first inner surface of the distal end of the sheath 9 of the sheath unit 12 is
Since the substantially L-shaped locking grooves 23 of the second embodiment are formed directly on the opposed wall surfaces of the cylinder of the sheath 9, the connecting member 22 of the first embodiment can be omitted, and the number of components can be reduced. Can be reduced.

Further, the treatment tool 1 for an endoscope according to the present embodiment
In FIG. 9A, a locking projection 41 is formed to be bent outward at the opening end of the cleaning port 19 of the sheath unit 12, and is replaced with a luer lock base shown in FIG. Since the rotation restricting member 42 is provided, the rotation restricting member 42 can be easily attached to and detached from the cleaning port 19.

It is to be noted that a general screw type attachment / detachment mechanism may be used in place of the rotation regulating member 42 composed of a luer lock base according to the present embodiment, or a completely different attachment / detachment mechanism may be provided.

In this embodiment, the rotation restricting member 42 formed by a solid shaft is shown.
(A) and (B) as in the modification shown in FIG.
As shown in FIG. 10 (B), a pipe 51 is formed inside the head, and the head of a connection ring 45 connected to the upper part of the rotation restricting member 42. A configuration may be adopted in which a cap 52 for retaining the cap 52 is attached.

When the conduit 51 is formed inside the rotation restricting member 42 as described above, the cap 52 of the rotation restricting member 42 attached to the cleaning port 19 is opened, whereby the endoscope treatment tool 1 is opened. Can be supplied to the inside of the sheath 9 through the conduit 51 of the rotation restricting member 42 in the assembled state.

FIGS. 11 to 14 show a third embodiment of the present invention. In the present embodiment, the configuration of the endoscope treatment tool 1 of the first embodiment (see FIGS. 1 to 4A and 4B) is changed as follows. It should be noted that most of the present embodiment has the same configuration as that of the first embodiment, and FIGS.
The same reference numerals are given to the same portions as (A) and (B), and the description thereof will be omitted.

That is, in the present embodiment, FIG.
As shown in the figure, a male screw portion 61 is provided at the rear end of the holding member 24 of the treatment section drive unit 13. The male screw portion 61 forms a connecting portion with the sheath unit 12 instead of the two locking claws 26 of the bayonet mechanism type of the first embodiment.

Further, the inner peripheral surface of the distal end portion of the sheath 9 of the sheath unit 12 is screwed into the male screw portion 61 of the treatment section drive unit 13 instead of the substantially L-shaped locking groove 23 of the first embodiment. A screw hole (not shown) is provided. In addition,
The connection with the sheath unit 12 may be formed by the same bayonet mechanism as in the first embodiment.

As shown in FIG. 12 (A), a tubular exterior body 62 is mounted on the outer peripheral surface of the sheath unit 12 on the proximal end side of the sheath 9. As shown in FIG. 13A, a through hole 63 is formed in the exterior body 62 in a direction orthogonal to the axial direction of the sheath 9.

Further, a cleaning port 64 is protruded from the outer peripheral surface of the exterior body 62. The inner end of the cleaning port 64 communicates with the through hole 63 of the exterior body 62. The outer end opening of the cleaning port 64 is provided with a rubber cap 6.
5 is openably and closably closed. The cleaning port 64 may have a luer lock shape.

Further, a rotation restricting member mounting portion 66 is provided on the outer peripheral surface of the exterior body 62 on the opposite side of the cleaning port 64 so as to protrude therefrom. The rotation restricting member 6 is provided with the rotation restricting member 6.
7 is mounted. The rotation restricting member 67 is provided with an operation shaft 68 movably mounted in the through hole 63 in the direction of the central axis thereof.
Substantially cylindrical elastic member 6 for urging in the direction of pushing outwardly
9 are provided.

Here, an elastic member mounting groove 70 is formed on the outer peripheral surface of the rotation restricting member mounting portion 66. further,
The elastic member mounting groove 7 is also provided on the outer peripheral surface of the head of the operation shaft 68.
1 is formed. The lower end of the elastic member 69 is fitted in the elastic member mounting groove 70 of the rotation regulating member mounting portion 66, and the upper end of the elastic member 69 is fitted in the elastic member mounting groove 71 of the operation shaft 68.

An insertion hole 72 through which the operation shaft 10 of the treatment section drive unit 13 can be inserted is provided below the operation shaft 68.
Are formed. Further, a slit-shaped engaging groove 73 that engages with the two cutout surfaces 32 of the rotation restricting portion 31 of the treatment section drive unit 13 is formed below the insertion hole 72 in the operation shaft 68. The upper end of the engagement groove 73 communicates with the insertion hole 72. A water supply hole 74 is formed at the lower end of the operation shaft 68. This water hole 7
4 is communicated with the lower end of the engaging groove 73.

The outer peripheral surface of the operating shaft 68 is shown in FIG.
3 (B) and FIG.
8, a guide groove 75 extending in the axial direction is formed. Here, a pin mounting hole 76 is formed on the outer wall surface of the exterior body 62, and a positioning pin 77 for positioning the operation shaft 68 is mounted in the pin mounting hole 76. The tip of the positioning pin 77 is connected to the operation shaft 68.
And the rotation of the operation shaft 68 in the direction around the axis is regulated.

In FIG. 13B, the two notches 32 of the rotation restricting portion 31 of the treatment section drive unit 13 are engaged with the engaging grooves 73 of the rotation restricting member 67 on the left side of the center line O. The right side of the center line O indicates a state in which the rotation restricting member 67 is pressed down and a portion other than the rotation restricting portion 31 of the operation shaft 10 of the treatment section drive unit 13 is inserted into the insertion hole 72 of the operation shaft 68. It is shown.

Next, the operation of the above configuration will be described.
First, a method of assembling the sheath unit 12, the treatment unit drive unit 13, and the operation unit 14 of the endoscope treatment tool 1 according to the present embodiment will be described.

In this embodiment, the sheath unit 12 is
The rotation restricting member 67 is mounted on the rotation restricting member mounting portion 66 as follows. Here, the elastic member 69 is inserted into the elastic member mounting groove 71 of the operation shaft 68 of the rotation restricting member 67.
And the elastic member 69 is combined with the operation shaft 68.

Thereafter, the operation shaft 68 of the rotation restricting member 67 is inserted into the through hole 63 of the exterior body 62. At this time, the positioning pin 77 is inserted into the guide groove 75 of the operation shaft 68, and the rotation of the operation shaft 68 around the axis is restricted. Thereby, the insertion hole 72 and the engagement groove 73 of the operation shaft 68 are always held in a state of being directed in the axial direction of the sheath 9.

Subsequently, the lower end of the elastic member 69 is fitted into the elastic member mounting groove 70 of the rotation restricting member mounting part 66. As a result, the operation shaft 68 of the rotation restricting member 67 is constantly urged by the elastic member 69 in a direction to push the operation shaft 68 to the outside of the through hole 63.

The cleaning port 64 has a rubber cap 6.
5, the outer end opening of the cleaning port 64 is closed by the rubber cap 65, and the airtightness of the cleaning port 64 is maintained.

When assembling the treatment tool 1 for an endoscope according to the present embodiment, the sheath unit 1 is used in the same manner as in the first embodiment.
2 is inserted into the sheath connecting member 15 of the fixed handle 6 of the operation unit 14, and the sheath unit 12 and the operation unit 14 are assembled. The treatment section drive unit 13 is attached to the assembly.

At the time of assembling the treatment section drive unit 13, the treatment section drive unit 13 is connected to the connection ball 30 at the rear end.
From the side into the sheath 9 of the sheath unit 12. At this time, by pushing down the operation shaft 68 of the rotation restricting member 67 in advance, the insertion hole 72 of the operation shaft 68 faces the sheath 9 of the sheath unit 12 as shown on the right side of the center line O in FIG. Switch to the state where it was made. Thereby, the connection ball 30 side of the operation shaft 10 of the treatment section drive unit 13 inserted into the sheath 9 of the sheath unit 12 can be passed through the insertion hole 72 of the operation shaft 68.

Further, the connection ball 30 side of the treatment section drive unit 13 that has passed through the insertion hole 72 of the operation shaft 68 extends outward from the handle connection section 17 of the sheath unit 12. Then, the connection ball 30 of the treatment section drive unit 13 is connected to the operation shaft connection section 29 of the movable handle 7.

During the assembling operation of the treatment section drive unit 13, the male screw portion 61 of the treatment section drive unit 13 is screwed into a screw hole (not shown) of the sheath unit 12. Thereby, the treatment section drive unit 13 and the sheath unit 12 can be fixed in a state where the movement of the operation shaft 10 in the axial direction is regulated.

Subsequently, the rotation restricting portion 31 of the treatment section drive unit 13 is adjusted to the position of the insertion hole 72 of the operation shaft 68. In this state, when the finger is released from the rotation restricting member 67 which has been pressed down, the operating shaft 68 of the rotation restricting member 67 is moved by the urging force of the elastic member 69 as shown in FIGS.
In (B), it returns to the original protruding position as shown on the left side of the center line O. At this time, as shown on the left side of the center line O in FIG. 13 (B), the two notches 32 of the rotation restricting portion 31 of the treatment section drive unit 13 are engaged with the engaging grooves 73 of the rotation restricting member 67. You. Thereby, the engagement groove 7 of the rotation regulating member 67
The rotation of the operating shaft 10 around the axis between the sheath unit 12 and the treatment unit drive unit 13 is regulated by the engagement portion between the sheath unit 12 and the treatment unit drive unit 13 by the engagement portion between the sheath unit 12 and the two cutout surfaces 32 of the rotation regulation unit 31 of the treatment unit drive unit 13. The treatment unit drive unit 13 is attached to the assembly of the sheath unit 12 and the operation unit 14.
Is completed.

Then, the treatment tool 1 for an endoscope of the present embodiment
Can be used in a state where the sheath unit 12 and the operation unit 14 are assembled to the operation unit 14 in the same manner as in the first embodiment. Also, when disassembling the endoscope treatment tool 1 of the present embodiment Next, a method of disassembling the endoscope treatment tool 1 of the present embodiment will be described. First, the operation shaft 68 of the rotation restricting member 67 is pushed down from the projecting position. And FIG.
In (B), as shown on the right side of the center line O, the state where the insertion hole 72 of the operation shaft 68 is arranged to face the sheath 9 of the sheath unit 12 is switched. Thereby, the connecting ball 30 side of the operating shaft 10 of the treatment section driving unit 13 inserted into the sheath 9 of the sheath unit 12 is moved to the operating shaft 6.
8 can be passed through the insertion hole 72.

Subsequently, the treatment section drive unit 13 is rotated in a direction opposite to the direction in which the treatment section drive unit 13 is assembled, so that the male screw portion 61 of the treatment section drive unit 13 and the screw hole (not shown) of the sheath unit 12 are disengaged from each other. In this state, the sheath unit 12
, The operation unit drive unit 13 is pulled out forward. At this time, by removing the treatment section drive unit 13 from the sheath unit 12, the connection state of the connection ball 30 of the treatment section drive unit 13 from the operation shaft connection section 29 of the movable handle 7 can be released at the same time.

After the treatment section drive unit 13 is removed from the sheath unit 12 and the finger is released from the operation shaft 68 of the rotation restricting member 67, the operating shaft 68 of the rotation restricting member 67 is returned by the urging force of the elastic member 69. Return to the projected position.

Finally, the sheath unit 12 is pulled out of the fixed handle 6 of the operation unit 14 to the front. At this time, with the operation of pulling the sheath unit 12 forward with respect to the fixed handle 6, the handle connecting portion 17 of the sheath unit 12 is removed from the sheath connecting member 15 of the fixed handle 6 of the operation section unit 14,
The sheath unit 12 is separated from the operation unit 14.

Therefore, the above configuration has the following effects. That is, the endoscopic treatment tool 1 of the present embodiment also has a sheath unit 12 similar to that of the first embodiment.
In addition, since the treatment section drive unit 13 and the operation section unit 14 can be easily disassembled and assembled, by removing the treatment section drive unit 13 from the sheath unit 12, the inside of the insertion section 2 can be cleaned and sterilized. Can be easily performed. Therefore, cleaning of the inside of the insertion portion 2 is
Since sterilization can be performed effectively in a short time, the washing and sterilizing properties of the inside of the insertion section 2 are improved.

FIG. 15 shows a fourth embodiment of the present invention. In the present embodiment, the operation unit 14 of the operation unit 3 of the endoscope treatment tool 1 according to the first embodiment (see FIGS. 1 to 4A and 4B) is configured as follows. It is.

That is, the fixed handle 6 and the movable handle 7 of the operation unit 14 of the present embodiment are made of an insulating material such as a plastic material. The fixed handle 6 and the movable handle 7 may be configured to cover the surface of a conductive material such as metal with an insulating material.

Further, an HF cord connecting pin 81 is insert-molded in the sheath connecting member 15 of the fixed handle 6 of the present embodiment. The HF cord connection pins 81 are made of a conductive material. The inner end of the HF cord connecting pin 81 can be connected to the handle connecting portion 17 of the sheath unit 12. An HF code (not shown) can be connected to the outer end of the HF code connection pin 81.

The sheath 9 of the sheath unit 12 has an outer pipe 83 made of an insulating material such as a plastic material on the outer peripheral surface of an inner pipe 82 made of a conductive material such as a metal.
Is mounted. Further, the handle connection portion 17 of the sheath unit 12 is made of, for example, a conductive material such as metal and is connected to the inner pipe 82 of the sheath 9. The operation shaft 10 of the treatment unit drive unit 13 is electrically connected to the inner pipe 82 of the sheath 9 of the sheath unit 12.

Therefore, in the above configuration, the HF cord connection pin 8 is attached to the sheath connecting member 15 of the fixed handle 6.
1, a connecting portion between the HF cord connecting pin 81 and the handle connecting portion 17 of the sheath unit 12, a connecting portion between the handle connecting portion 17 and the inner pipe 82 of the sheath 9, and Since the connection between the inner pipe 82 and the operation shaft 10 of the treatment section drive unit 13 is made to be directly connected between the conductive materials without using an adhesive, the connection is generally made via an insulating adhesive. HF cord connection pin 8 without
1 and the treatment section drive unit 13 can be electrically connected. As a result, there is no conduction failure due to the adhesive, so that it is possible to provide the operation section 3 of the endoscope treatment tool 1 which is easy to assemble, can be manufactured at low cost, and is reliably energized.

FIG. 16 shows a fifth embodiment of the present invention. In the present embodiment, the operation unit 14 of the operation unit 3 of the endoscope treatment tool 1 according to the first embodiment (see FIGS. 1 to 4A and 4B) is configured as follows. It is.

That is, the fixed handle 6 and the movable handle 7 of the operation unit 14 of the present embodiment are made of an insulating material such as a plastic material. The fixed handle 6 and the movable handle 7 may be configured to cover the surface of a conductive material such as metal with an insulating material.

Further, an HF cord connection pin 91 is insert-molded on the operation shaft connecting portion 29 of the movable handle 7 according to the present embodiment. The HF code connection pins 91 are made of a conductive material such as a metal. The treatment section drive unit 13 is provided at the inner end of the HF cord connection pin 91.
The connecting ball 30 of the operating shaft 10 can be connected. An HF code (not shown) can be connected to the outer end of the HF code connection pin 91.

The operation shaft 1 of the treatment section drive unit 13
0 is made of a conductive material such as a metal. Further, the outer surface of the sheath 9 of the sheath unit 12 is made of an insulating material or covered with the insulating material.

Therefore, in the above configuration, the HF cord connecting pin 91 is connected to the operating shaft connecting portion 29 of the movable handle 7.
The connection between the HF cord connection pin 91 and the connection ball 30 of the operation shaft 10 of the treatment section drive unit 13 is directly connected between the conductive materials without using an adhesive. , Generally without an insulating adhesive
The F-code connection pin 91 and the connection ball 30 of the operation shaft 10 of the treatment section drive unit 13 can be electrically connected. As a result, there is no conduction failure due to the adhesive, so that it is possible to provide the operation section 3 of the endoscope treatment tool 1 which is easy to assemble, can be manufactured at low cost, and is reliably energized.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. Next, other characteristic technical matters of the present application will be additionally described as follows. (Appendix 1) An openable and closable treatment member is disposed on the distal end side of the insertion portion to be inserted into a living body, and a proximal operation portion is connected to a proximal end portion of the insertion portion, and the inside of the insertion portion is connected. An endoscope provided with an opening / closing drive mechanism that is provided with an operation shaft of the treatment member so as to be able to advance and retreat, and moves the operation shaft forward and backward in response to an operation of the operation portion to open and close the treatment member. In the treatment tool, the treatment section drive unit integrally assembled with the opening / closing drive mechanism of the treatment member and a sheath unit forming an outer shell of the insertion section, the operation of the insertion section and the sheath unit being mutually performed. A treatment tool for an endoscope, comprising: a connection portion for fixing movement in an axial direction; and a connection portion for fixing rotation of the insertion portion and the sheath unit around the operation axis.

(Effect of Additional Item 1) Since the treatment section drive unit can be removed together with the operation shaft from the insertion section, the washing and sterilization properties are improved. Further, when the operation shaft is broken, only the treatment section drive unit can be replaced. Furthermore, a treatment unit drive unit, a sheath unit,
By preparing a plurality of operation units, it is possible to configure the treatment tool main body in various combinations.

(Additional Item 2) The endoscope treatment tool according to Additional Item 1, wherein the treatment member and the sheath unit are rotatable with respect to the operation unit. (Purpose of Additional Items 1 and 2) An object of the present invention is to improve the washing and sterilization properties by enabling the treatment unit drive unit to be easily disassembled and assembled from the treatment instrument body. Further, by replacing the treatment unit drive unit, it becomes possible to cope with breakage of the operation shaft.

(Operation of Additional Items 1 and 2) The structure of the additional items 1 and 2 has an effect that the treatment section drive unit and the insertion section are detachable, so that cleaning and sterilization can be performed effectively. .

(Additional Item 3) The treatment tool for an endoscope according to Additional Item 1 or 2, wherein the sheath unit and the operation section are detachable. (Additional Item 4) Additional Portions 1 to 3, wherein a port for sending water or air is provided inside the sheath unit.
Endoscope treatment tool.

(Additional Item 5) The treatment tool for an endoscope according to Additional Items 1 to 3, wherein the port is provided in the sheath unit. (Additional Item 6) A connecting portion for fixing the movement in the operation axis direction is provided at the distal end of the insertion portion and the sheath unit, and a connecting portion for fixing the rotation around the operation shaft is provided between the insertion portion and the sheath unit. The treatment tool for an endoscope according to additional items 1 to 5, which is provided at an end portion.

(Additional Item 7) A connecting portion for fixing the movement in the operation axis direction is provided at the distal end portion of the insertion portion and the sheath unit, and a connecting portion for fixing the rotation around the operation axis is provided at the port portion. The treatment tool for an endoscope according to additional items 1 to 5, characterized in that:

(Additional Item 8) An endoscope treatment tool according to Additional Items 1 to 7, wherein a bayonet is provided as a means for fixing the movement in the operation axis direction. (Additional Item 9) The treatment tool for an endoscope according to Additional Items 1 to 7, wherein a screw is provided as a means for fixing the movement in the operation axis direction.

(Supplementary note 10) As means for fixing the rotation around the operation shaft, the rotation locking member inserted from the port is engaged with the operation shaft. Endoscope treatment tool.

(Additional Item 11) The treatment tool for an endoscope according to Additional Items 1 to 10, wherein the rotation locking member inserted from the port and the port are fixed by frictional resistance. (Additional Item 12) The treatment tool for an endoscope according to Additional Items 1 to 10, wherein the rotation locking member inserted from the port and the port are fixed using a screw.

(Additional Item 13) The treatment tool for an endoscope according to Additional Items 1 to 10, wherein the rotation locking member inserted from the port and the port are fixed using a luer lock. (Additional Item 14) The treatment tool for an endoscope according to Additional Items 1 to 9, wherein a dedicated port for attaching a rotation locking member for fixing rotation around the operation shaft is provided separately from the port.

(Supplementary Item 15) A rotation locking member having a position where the dedicated port is reciprocated to engage with the operation shaft to fix the rotation around the operation shaft and a position where the rotation cannot be fixed. The treatment tool for an endoscope according to additional items 1 to 9, wherein the treatment tool is provided.

(Additional Item 16) The treatment tool for an endoscope according to Additional Items 1 to 13, wherein a port for sending water or air is provided in the rotation locking member inserted from the port. (Additional Item 17) An additional item 1 to 16, wherein a mechanism for determining the positions of the rotation locking member and the operation shaft is provided.
Endoscope treatment tool.

(Additional Item 18) The endoscope treatment tool according to additional items 1 to 16, wherein a pin is used as the positioning mechanism. (Additional Item 19) The treatment tool for an endoscope according to Additional Items 1 to 16, wherein the rotation locking member and the port or the fixed port do not rotate relative to each other as the positioning mechanism.

(Purpose of Supplementary Items 3 to 19) The object of the present invention is to improve the washing sterilization property by easily disassembling the treatment instrument main body into a treatment section drive unit, a sheath unit, and an operation section. Further, by replacing the treatment section drive unit, it becomes possible to cope with damage to the operation shaft. Further, by preparing a plurality of treatment unit drive units, sheath units, and operation units, it becomes possible to configure the treatment tool main body in a combination of each of them.

(Operation of Additional Items 3 to 19) Additional Items 3-1
The configuration 9 has an effect that the treatment section drive unit, the insertion section, and the operation section are detachable, so that washing and sterilization can be performed effectively.

[0117]

According to the present invention, the sheath unit constituting the outer shell of the insertion section and the treatment section drive unit integrally assembled with the opening / closing drive mechanism for the treatment member are detachably provided, respectively. Since the axial movement restricting means for restricting the axial movement of the operating shaft in the unit and the axial rotation restricting means for restricting the rotation of the operating shaft in the sheath unit in the axial direction are provided, the opening and closing drive of the treatment member is provided. The treatment unit drive unit having the mechanism integrally assembled can be easily disassembled and assembled from the main body of the treatment instrument, so that the inside of the insertion portion can be cleaned and sterilized, and the treatment unit drive unit can be replaced. Thereby, it is possible to deal with breakage of the operation shaft.

[Brief description of the drawings]

FIG. 1 is a side view showing a treatment tool for an endoscope according to a first embodiment of the present invention.

FIG. 2 shows an exploded state of the treatment tool for an endoscope according to the first embodiment, wherein (A) is a side view of a sheath unit,
(B) is a side view of the treatment section drive unit, (C) is a side view of the operation section unit, (D) is a front view showing an engagement claw of the rotation restricting member, and (E) is a side view of the rotation restricting member. .

FIG. 3A is a longitudinal sectional view of a distal end portion of a sheath unit of the endoscope treatment tool according to the first embodiment, and FIG. 3B is a longitudinal sectional view of the endoscope treatment tool according to the first embodiment; The side view which shows the front-end | tip part of an insertion part, (C) is CC sectional view taken on the line (B), (D) is DD sectional view taken on the (B) side.

FIG. 4A is a longitudinal sectional view of a main part showing a state in which a rotation restricting member is inserted into a cleaning port of the treatment tool for an endoscope according to the first embodiment, and FIG. FIG. 5 is a vertical cross-sectional view showing a state viewed from the left side.

5A and 5B show a modification of the rotation restricting member of the treatment tool for an endoscope according to the first embodiment, wherein FIG. 5A is a side view showing the appearance of the rotation restricting member, and FIG. FIG. 6 is a longitudinal sectional view of a rotation restricting member of FIG.

FIG. 6 is a side view showing a treatment tool for an endoscope according to a second embodiment of the present invention.

FIG. 7 shows an exploded state of the endoscope treatment tool according to the second embodiment, wherein (A) is a side view of a sheath unit,
(B) is a side view of the treatment section drive unit, (C) is a side view of the operation section unit, (D) is a front view showing an engagement claw of the rotation restricting member, and (E) is a side view of the rotation restricting member. .

FIG. 8A is a longitudinal sectional view of a distal end portion of a sheath unit of the endoscope treatment tool according to the second embodiment, and FIG. 8B is a longitudinal sectional view of the endoscope treatment tool according to the second embodiment. The side view which shows the front-end | tip part of an insertion part, (C) is CC sectional view taken on the line (B), (D) is DD sectional view taken on the (B) side.

FIG. 9A is a longitudinal sectional view of a rotation restricting member of the endoscope treatment tool according to the second embodiment, and FIG. 9B is a cleaning port of the endoscope treatment tool according to the second embodiment; (C) is a longitudinal sectional view of a main part showing a state in which the rotation restricting member is being inserted into the endoscope, and (C) is an engagement of the rotation restricting member inserted into the cleaning port of the endoscope treatment tool according to the second embodiment. The longitudinal section of the important section showing the state where the claw part was engaged with two notch surfaces of the operation shaft.

FIG. 10 shows a modification of the rotation restricting member of the endoscope treatment tool according to the second embodiment, where (A) is a side view showing the appearance of the rotation restricting member, and (B) is (A). FIG. 6 is a longitudinal sectional view of a rotation restricting member of FIG.

FIG. 11 is a side view showing an endoscope treatment tool according to a third embodiment of the present invention.

FIG. 12 shows an exploded state of the endoscope treatment tool according to the third embodiment, where (A) is a side view of a sheath unit,
(B) is a side view of the treatment unit drive unit, and (C) is a side view of the operation unit.

FIG. 13A is a longitudinal sectional view showing an assembled state of a rotation restricting member of the endoscope treatment tool according to the third embodiment, and FIG.
FIG. 9 is a longitudinal sectional view of a main part for describing the operation of a rotation restricting member of the endoscope treatment tool according to the third embodiment.

FIG. 14 is a cross-sectional view showing a state in which two notches of a rotation restricting portion of a treatment section drive unit are engaged with engagement grooves of a rotation restricting member of the treatment tool for an endoscope according to the third embodiment; FIG.

FIG. 15 is a vertical cross-sectional view showing a main part configuration of an endoscope treatment tool according to a fourth embodiment of the present invention.

FIG. 16 is a side view showing a configuration of a main part of a treatment tool for an endoscope according to a fifth embodiment of the present invention in a partial cross section.

[Explanation of symbols]

2 Insertion part 3 Operation part 5 Treatment member 10 Operation shaft 11 Opening / closing drive mechanism 12 Sheath unit 13 Treatment part drive unit 27 Locking mechanism (axial movement control means) 31 Rotation control part (axial rotation control means) 33, 42 , 67 Rotation restricting member (rotation restricting means around axis)

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 4, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

Further, a connecting portion 25 to the sheath unit 12 is provided at a rear end of the holding member 24. The connecting portion 25 is provided with two bayonet mechanism type locking claws 26. These locking claws 26 are attached to the sheath unit 1.
The two connecting members 22 are inserted into the two locking grooves 23 so as to be able to be inserted and removed, respectively. The operating shaft 1 between the sheath unit 12 and the treatment unit drive unit 13 is formed by the two engagement claws 26 of the treatment unit drive unit 13 and the two engagement grooves 23 of the connecting member 22 of the sheath unit 12.
A bayonet-type locking mechanism (axial movement restricting means) 27 for restricting the movement in the 0 axial direction is configured. The number of the locking claws 26 may be one, or three or more. In addition,
In the present embodiment, the configuration in which the bayonet mechanism-type locking mechanism 27 is provided as the axial movement restricting means is shown, but a structure other than the bayonet mechanism, for example, a screw-type locking mechanism may be used.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0037

[Correction method] Change

[Correction contents]

When the sheath unit 12 and the treatment unit drive unit 13 are assembled to the operation unit 14, the space between the treatment unit drive unit 13 and the sheath unit 12 is in the axial direction of the operation shaft 10 and around the axis. The movement is restricted in both directions, but only the movement of the operation shaft 10 in the rotation direction is restricted, and the operation shaft 10 is held movably in the axial direction of the operation shaft 10.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

Therefore, by rotating the movable handle 7 with respect to the fixed handle 6 of the operation section 3 in a state where the sheath unit 12 and the treatment section drive unit 13 are assembled to the operation section unit 14, the operation shaft is 10 moves forward and backward in the axial direction of the insertion section 2, and the treatment members 5 and 5 are opened and closed via the opening and closing drive mechanism 11 with the axial movement of the operation shaft 10.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0059

[Correction method] Change

[Correction contents]

Then, the treatment tool 1 for an endoscope of the present embodiment
Indicates the sheath unit 12 and the treatment
In a state where the unit drive unit 13 is assembled, it can be used in the same manner as in the first embodiment. Also, when disassembling the endoscope treatment tool 1 of the present embodiment, the operation is performed in the same procedure as in the first embodiment.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 008

[Correction method] Change

[Correction contents]

Then, the treatment tool 1 for an endoscope of the present embodiment
Indicates the sheath unit 12 and the treatment
In a state where the unit drive unit 13 is assembled, it can be used in the same manner as in the first embodiment. Further, a case where the endoscope treatment tool 1 of the present embodiment is disassembled will be described. First, the operation shaft 68 of the rotation restricting member 67 is pushed down from the projecting position. Then, as shown on the right side of the center line O in FIG.
Of the sheath unit 12 is switched to a state in which the sheath unit 9 is opposed to the sheath 9. Thereby, the operating shaft 10 of the treatment section drive unit 13 inserted into the sheath 9 of the sheath unit 12
Can be passed through the insertion hole 72 of the operation shaft 68.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Eiji Murakami, Inventor 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industrial Co., Ltd. (72) Kenichi Kimura 2-43-2, Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] An openable and closable treatment member is provided at a distal end side of an insertion portion to be inserted into a living body, and a proximal operation portion is connected to a proximal end portion of the insertion portion, and an operation portion on a hand side is provided inside the insertion portion. An endoscope treatment, wherein an operation shaft of the treatment member is disposed so as to be able to advance and retreat, and an opening and closing drive mechanism is provided which opens and closes the treatment member by moving the operation shaft forward and backward in response to the operation of the operation unit. In the device, a sheath unit constituting an outer shell of the insertion section and a treatment section drive unit integrally assembled with the opening and closing drive mechanism of the treatment member are detachably provided, and the operation of the sheath unit is performed. An axial movement restricting means for restricting axial movement of the shaft, and an axial rotation restricting means for restricting rotation of the operation shaft in the sheath unit in the axial direction are provided. View mirror for the treatment tool.