Endoscopic treatment apparatus and method of manufacturing endoscopic treatment tool

Patent metadata

Field	Value
Publication number	US-2022395287-A1
Application number	US-202217839790-A
Country	US
Kind code	A1
Filing date	Jun 14, 2022
Priority date	Jun 15, 2021
Publication date	Dec 15, 2022
Grant date	—

Abstract

An endoscope treatment instrument having a sheath, a rotation axis extending in a width direction orthogonal to a longitudinal direction of the sheath, a plate formed with a first opening through which the rotation axis passes and a second opening having a width different from the width of the first opening, a forceps piece rotatably supported about the first opening and the rotation axis passing through the second opening, and a wire connected to a proximal end portion of the plate.

First claim

1 . An endoscopic treatment device comprising:
a sheath; a rotation shaft extending in a width direction perpendicular to a longitudinal direction of the sheath; a forceps piece having a plate formed with a first opening through which the rotation shaft passes and a second opening having a width different from the width of the first opening, the forceps piece being rotatably supported about the rotation shaft through the first opening and the second opening; and a wire connected to a proximal end of the plate.

2 . The endoscopic treatment device of claim 1 further comprising:
a pair of frame pieces attached to the tip of the sheath,
wherein the rotation shaft engages with ends of the pair of frame pieces, and
wherein the rotation shaft extends between the pair of frame pieces and the plate is disposed between the pair of frame pieces.

3 . The endoscopic treatment device of claim 1 , wherein the plate includes a first member having the first opening and a second member having the second opening and at least a portion of the first member and the second member overlap such that the first opening at least partially overlaps with the second opening.

4 . The endoscopic treatment device of claim 3 , wherein the first opening is a first hole having a first inner diameter and the second opening is a second hole having a second inner diameter, the first inner diameter being larger than the second inner diameter.

5 . The endoscopic treatment device of claim 4 , wherein an inner peripheral surface of the second hole is inside an inner peripheral surface of the first hole in a direction along a central axis of the first hole.

6 . The endoscopic treatment device of claim 4 , wherein a portion of the outer peripheral surface entire circumference of the second hole is outside the inner peripheral surface of the first hole in a direction along the central axis of the first hole.

7 . The endoscopic treatment device of claim 3 , wherein the second member is located closer to the central axis of the sheath than the first member.

8 . The endoscopic treatment device of claim 4 , wherein the first member includes a third hole having a third inner diameter proximal to the first hole and the second member includes a fourth hole having a fourth inner diameter proximal to the second hole, the third inner diameter being larger than the fourth inner diameter and a portion of the wire passes through the third hole and the fourth hole.

9 . The endoscopic treatment device of claim 8 , wherein an entire inner circumferential surface of the fourth hole is inside an inner circumferential surface of the third hole when in a direction along a central axis of the third hole.

10 . The endoscopic treatment device of claim 9 , wherein a portion of an entire circumference of the inner circumferential surface of the fourth hole is outside the inner circumferential surface of the third hole in a direction along the central axis of the third hole.

11 . The endoscopic treatment device of claim 8 , wherein the second inner diameter is larger than the third inner diameter and smaller than the first inner diameter.

12 . The endoscopic treatment device of claim 3 , wherein the forceps piece includes a first forceps piece and a second forceps piece and the plates are a first plate and a second plate, the first plate including the first member and the second member and the second plate having a third member with a fifth hole through which the rotating shaft passes, and a sixth hole.

13 . The endoscopic treatment device of claim 3 further comprising a fourth member, wherein the second plate is folded with a boundary region between the fifth hole and the sixth hole, and at least a part of the third member and the fourth member overlap each other when viewed from the width direction.

14 . The endoscopic treatment device of claim 13 , wherein the second member and the fourth member are disposed between the first member and the third member and a spacer is disposed between the second member and the fourth member.

15 . The endoscopic treatment device of claim 4 , wherein the first member includes a third hole having a third inner diameter proximal to the first hole and the second member includes a fourth hole having a fourth inner diameter proximal to the second hole, the third inner diameter being smaller than the fourth inner diameter and wherein a portion of the wire passes through the third hole and the fourth hole.

16 . The endoscopic treatment device of claim 4 , wherein the first member has a third hole on the proximal side of the first member and the second member does not overlap with the third hole such that a portion of the wire passes through the third hole and the portion of the wire does not extend through the second member.

17 . The endoscopic treatment device of claim 2 , wherein at least one distal end of the pair of frame pieces includes an opening from an axis of rotation towards the tip of the forceps piece.

18 . The endoscopic treatment device of claim 3 , wherein the second member is located on the central axis side of the sheath from the first member and the first opening is a first hole having a first inner diameter, the second opening is a second hole having a second inner diameter, and the second inner diameter is larger than the first inner diameter.

19 . The endoscopic treatment device of claim 18 , wherein the first member includes a third hole having a third inner diameter proximal to the first hole, the second member includes a fourth hole having a fourth inner diameter proximal to the second hole, the fourth inner diameter is larger than the third inner diameter, and a portion of the wire passes through the third hole and the fourth hole.

20 . A method of manufacturing an endoscopic treatment device, the method comprising:
drilling a first hole and a second hole in a first surface of a plate member, the first surface of the plate member being opposite a second surface of the plate member, wherein the drilling includes drilling the first hole and the second hole from the first surface toward the second surface; performing surface compressing on the first surface of the plate member; folding the first surface of the plate member by pressing such that the first hole and the second hole face each other; and performing surface pushing on the second surface of the plate member, wherein subsequent to the drilling, the surface compressing is performed such that the folding is performed subsequent to the surface compressing, and the surface pushing is performed subsequent to the folding.

Assignees

• Olympus Medical Systems Corp

Inventors

• Okamoto Haruki
• Hanai Takaaki
• Watanabe Risa
• Nomura Yusuke
• Yorita Ryu
• Karasawa Kenji

Classifications

• A61B2017/0034

  adapted to be inserted through a working channel of an endoscope · CPC title

• A61B2017/2939

  Details of linkages or pivot points · CPC title

• A61B10/06 Primary

  Biopsy forceps {, e.g. with cup-shaped jaws} · CPC title

• A61B2017/2926

  Details of heads or jaws · CPC title

• A61B10/04

  Endoscopic instruments, e.g. catheter-type instruments · CPC title