US-12622572-B2 - Endoscopic treatment tool

Abstract

An endoscope treatment tool, comprising: a sheath; a handle body; a wire; a treatment portion connected to a distal end of the wire and arranged on a distal end side of the sheath; a rotating handle movable with respect to the handle body and connected to the wire; a conductive connector having an insertion passage through which the wire is inserted, wherein the wire is movable in a wire movement direction to advance and retreat in a direction that is parallel to a longitudinal axis of the handle body, wherein the wire is rotatable around an axis of the wire movement direction, and wherein the conductive connector extends in a direction that intersects the wire movement direction.

Inventors

• Yusuke Shiota
• Kotaro Yamada
• Daiki HAGIWARA
• Hiromasa Kato
• Chika Miyajima

Assignees

• OLYMPUS MEDICAL SYSTEMS CORP.

Dates

Publication Date

20260512

Application Date

20230202

Claims (20)

1. 1 . An endoscope treatment tool, comprising: a sheath; a handle body; a wire; a treatment portion connected to a distal end of the wire and arranged on a distal end side of the sheath; a rotating handle rotatable with respect to the handle body; and a conductive connector attached to the handle body and having an insertion passage through which the wire is inserted, wherein the wire is movable relative to the conductive connector in a wire movement direction to advance and retreat in a direction of a longitudinal axis of the sheath, wherein the wire is rotatable around the longitudinal axis of the sheath, wherein the conductive connector extends in a direction that intersects the wire movement direction, wherein the rotating handle is fixed to the handle body in the direction of the longitudinal axis of the sheath and is configured to be rotatable around the longitudinal axis of the sheath, and wherein a proximal end of the wire is connected to the rotating handle.
2. 2 . The endoscopic treatment tool according to claim 1 , wherein, when the conductive connector is in a first position, a gap is present between a surface of the insertion passage of the conductive connector and an outer surface of the wire, wherein, when the conductive connector moves from the first position in a first direction, the surface of the insertion passage contacts the wire on a first portion of the outer surface of the wire that is oriented toward a second direction, wherein the first direction is a radial direction relative to the wire, and wherein the second direction is opposite to the first direction.
3. 3 . The endoscopic treatment tool according to claim 2 , wherein, when the conductive connector moves from the first position in the second direction, the surface of the insertion passage contacts the wire on a second portion of the outer surface of the wire that is oriented toward the first direction.
4. 4 . The endoscopic treatment tool according to claim 1 , wherein the rotating handle is provided on a proximal side of the handle body.
5. 5 . The endoscopic treatment tool according to claim 1 , wherein a clearance between the conductive connector and the handle body is larger than a gap between the insertion passage and the wire.
6. 6 . The endoscopic treatment tool according to claim 1 , further comprising: a slider translatable with respect to the rotating handle to advance and retreat in a direction of a longitudinal axis of the handle body, wherein the rotating handle is translatable with respect to the handle body to advance and retreat in the direction of the longitudinal axis of the handle body and is rotatable with respect to the longitudinal axis of the handle body, and wherein a proximal end of the wire is connected to the slider.
7. 7 . The endoscopic treatment tool according to claim 6 , wherein the rotating handle is provided on a proximal side of the handle body.
8. 8 . The endoscopic treatment tool according to claim 6 , wherein the handle body has a conductive member that electrically connects the wire and the conductive connector.
9. 9 . The endoscopic treatment tool according to claim 8 , wherein the conductive member has a columnar shape.
10. 10 . The endoscope treatment tool according to claim 1 , wherein a slider is positioned on the rotating handle and is movable in a back and forth direction.
11. 11 . The endoscope treatment tool according to claim 1 , wherein the handle body has a conductive member that electrically connects the wire and the conductive connector, and wherein the conductive member is a spring.
12. 12 . An endoscope treatment tool, comprising: a sheath; a handle body; a wire; a treatment portion connected to a distal end of the wire and arranged on a distal end side of the sheath; a rotating handle rotatable with respect to the handle body; a slider configured to advance and retreat in a direction of a longitudinal axis of the handle body; and a conductive connector attached to the slider and having an insertion passage through which the wire is inserted, wherein the wire is movable relative to the conductive connector in a wire movement direction to advance and retreat in a direction of a longitudinal axis of the sheath, wherein the wire is rotatable around the longitudinal axis of the sheath, wherein the conductive connector extends in a direction that intersects the wire movement direction, wherein the rotating handle is configured to be rotatable around the longitudinal axis of the sheath, and wherein a proximal end of the wire is connected to the slider.
13. 13 . The endoscopic treatment tool according to claim 12 , wherein, when the conductive connector is in a first position, a gap is present between a surface of the insertion passage of the conductive connector and an outer surface of the wire, wherein, when the conductive connector moves from the first position in a first direction, the surface of the insertion passage contacts the wire on a first portion of the outer surface of the wire that is oriented toward a second direction, wherein the first direction is a radial direction relative to the wire, and wherein the second direction is opposite to the first direction.
14. 14 . The endoscopic treatment tool according to claim 13 , wherein, when the conductive connector moves from the first position in the second direction, the surface of the insertion passage contacts the wire on a second portion of the outer surface of the wire that is oriented toward the first direction.
15. 15 . The endoscopic treatment tool according to claim 12 , wherein the rotating handle is provided on a distal end side of the slider.
16. 16 . The endoscopic treatment tool according to claim 15 , further comprising: a pipe translatable with respect to the rotating handle to advance and retreat along the longitudinal axis of the handle body and rotatable with respect to the longitudinal axis around the longitudinal axis of the handle body, wherein a proximal end of the pipe is attached to the proximal end of the wire, and wherein, with respect to the slider, the pipe is rotatable about the longitudinal axis of the handle body and is non-translatable in the direction of the longitudinal axis of the handle body.
17. 17 . The endoscopic treatment tool according to claim 12 , wherein a clearance between the conductive connector and the slider is larger than a gap between the insertion passage and the wire.
18. 18 . An endoscope treatment tool, comprising: a sheath; a handle body; a wire; a treatment portion connected to a distal end of the wire and arranged on a distal end side of the sheath; a rotating handle rotatable with respect to the handle body; and a conductive connector attached to the handle body and having an insertion passage through which the wire is inserted, wherein the wire is movable relative to the conductive connector in a wire movement direction to advance and retreat in a direction of a longitudinal axis of the sheath, wherein the wire is rotatable around the longitudinal axis of the sheath, wherein the conductive connector extends in a direction that intersects the wire movement direction, wherein the rotating handle is translatable with respect to the handle body to advance and retreat in the direction of the longitudinal axis of the handle body and is rotatable around the longitudinal axis of the handle body, wherein a proximal end of the wire is connected to the rotating handle, and wherein the rotating handle is provided on a proximal side of the handle body.
19. 19 . The endoscopic treatment tool according to claim 18 , wherein, when the conductive connector is in a first position, a gap is present between a surface of the insertion passage of the conductive connector and an outer surface of the wire, wherein, when the conductive connector moves from the first position in a first direction, the surface of the insertion passage contacts the wire on a first portion of the outer surface of the wire that is oriented toward a second direction, wherein the first direction is a radial direction relative to the wire, and wherein the second direction is opposite to the first direction.
20. 20 . The endoscopic treatment tool according to claim 19 , wherein, when the conductive connector moves from the first position in the second direction, the surface of the insertion passage contacts the wire on a second portion of the outer surface of the wire that is oriented toward the first direction.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application claims priority based on U.S. Patent Provisional Application No. 63/306,154 filed in the United States on Feb. 3, 2022, the entire contents of which are incorporated herein by reference. BACKGROUND Technical Field The present invention relates to an endoscopic treatment tool. Background Art Conventionally, in endoscopic treatment, endoscopic treatment tools equipped with high-frequency treatment devices such as hemostatic forceps and high-frequency knives that apply high-frequency current to cauterize a bleeding target to stop bleeding have been used. A high-frequency current is supplied to a wire connected to a high-frequency treatment device via an A cord (active cord) connected to a connector provided in an operation portion of an endoscope treatment tool. When the high-frequency treatment device needs to be rotated, the wire connected to the high-frequency treatment device is attached to the operation portion so as to be rotatable around the longitudinal axis of the operation portion. In this case, when the wire is rotated to rotate the high-frequency treatment device, the connector attached to the wire also rotates, so the A cord is likely to wind around the operation portion. The endoscopic treatment tool described in Japanese Unexamined Patent Application, First Publication No. 2009-034388 (hereinafter referred to as Patent Document 1) can rotate only the wire without rotating the connector around the longitudinal axis by rotating the handle, thereby rotating the distal end mechanism. The energizing plug is attached to a non-rotating operating member and does not rotate even when the tip mechanism is rotated. However, in the endoscopic treatment tool described in Patent Document 1, the energizing plug and the wire are connected by an elastic conducting portion. An elastic conductor may interfere with the movement of the wire, for example. Therefore, in the endoscopic treatment tool described in Patent Document 1, the connection mode between the energizing plug and the wire was not always optimal. SUMMARY In view of the above circumstances, it is an object of the present invention to provide an endoscopic treatment tool in which a connector to which a high-frequency current is supplied does not rotate and the connector and a wire connected to a high-frequency treatment device are connected. In order to solve the above problems, the present invention proposes the following means. A treatment tool for an endoscope according to a first aspect of the present invention includes: a sheath; a handle body attached to a proximal end of the sheath; a wire arranged so as to be capable of advancing and retreating in a direction of a longitudinal axis of the handle body and to be capable of rotating around the longitudinal axis; a treatment portion connected to a distal end of the wire and arranged on a distal end side of the sheath; a rotating handle configured to be capable of moving with respect to the handle body and connected to a proximal end of the wire; a conductive connector having an insertion passage through which the wire is inserted so as to be capable of advancing and retreating and to be capable of rotating, and extending in a direction intersecting with a direction of movement of the wire. In the endoscopic treatment tool according to the present invention, the connector to which high-frequency current is supplied does not rotate, and the connector and the wire connected to the high-frequency treatment device are connected. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view of an endoscopic treatment system provided with an endoscopic treatment tool according to a first embodiment. FIG. 2 is an overall view showing the endoscopic treatment tool. FIG. 3 is a side view of an operation portion of the endoscopic treatment tool. FIG. 4 is a top view of the operation portion. FIG. 5 is a cross-sectional view of the operation portion. FIG. 6 is a diagram showing a connecting portion of a connector of the operation portion. FIG. 7 is a cross-sectional view of the operation portion taken along line X-X of FIG. 3. FIG. 8 is a cross-sectional view of a slider of the operation portion. FIG. 9 is a cross-sectional view of the slider in which the lower side of the operation portion faces vertically downward. FIG. 10 is a cross-sectional view of the slider in which the upper side of the operation portion faces vertically downward. FIG. 11 is a cross-sectional view of the slider with the left side of the operation portion facing vertically downward. FIG. 12 is a diagram showing slits formed in a pipe of an operation wire. FIG. 13 is a diagram showing a modified example of an insertion passage of the connector. FIG. 14 is a diagram showing an operation portion of an endoscope treatment tool according to a second embodiment. FIG. 15 is a cross-sectional view of the operation portion. FIG. 16 is a cross-sectional view of a fixed slider of the op