TREATMENT TOOL FOR ENDOSCOPE

• US 20120203063A1
• Filed: 11/29/2011
• Published: 08/09/2012
• Est. Priority Date: 05/31/2010
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Medical Systems Corporation (Olympus Corporation)
• Inventors: SUZUKI, Keita, KIMURA, Megumi, SATO, Kazuya
• Granted Patent: US 9,072,538 B2
• Time in Patent Office: Days
• US Class Current: 600/106
• CPC Class Codes: A61B 10/06 Biopsy forceps , e.g. with cup-shaped jaws
• CPC Class Codes: A61B 17/2816 Pivots
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft
• CPC Class Codes: A61B 2017/2939 Details of linkages or pivot points
• CPC Class Codes: A61B 2017/2941 Toggle linkages
• CPC Class Codes: A61B 2017/2946 Locking means

Abstract

A treatment tool for endo scope includes a pair of forceps members supported by a forceps rotation axis such that they can rotate relatively, an operation part for performing an open-close operation of the pair of forceps members, an operation wire that connects the pair of forceps members and the operation part, an insertion part which the operation wire is inserted into, a cover member that secures the forceps rotation axis to the insertion part, a connection member including a link rotation axis, provided at a distal-end part of the operation wire, and a pair of link members, first end parts of each being rotatably connected via respective rotation axis members to a proximal-end part of each of the pair of forceps members, and second end parts of each being rotatably connected to the link rotation axis. The cover member includes restricting parts.

Claims

1. A treatment tool for endoscope, used by being inserted via an endoscope into a body cavity, comprising:

a pair of forceps members supported by a forceps rotation axis such that they can rotate relatively;

an operation part that performs an open-close operation of the pair of forceps members;

an operation wire that connects the pair of forceps members and the operation part;

an insertion part which the operation wire is inserted into;

a cover member that secures the forceps rotation axis to the insertion part;

a connection member including a link rotation axis, provided at a distal-end part of the operation wire; and

a pair of link members, first end parts of each being rotatably connected via respective rotation axis members to a proximal-end part of each of the pair of forceps members, and second end parts of each being rotatably connected to the link rotation axis;

wherein

the cover member includes restricting parts formed such that, by engaging with end parts of the rotation axis members, they restrict the movement of the rotation axis members in a direction of approaching the axis of the operation wire.

2. The treatment tool for endoscope according to claim 1, wherein

the restricting parts are provided in the cover member such that they open in a direction of separating from the axis of the operation wire.

3. The treatment tool for endoscope according to claim 1, wherein

the connection member includes two of the link rotation axes, and axes of the link rotation axes are parallel with each other in a direction of separating from the axis of the operation wire;

and

second end parts of the pair of link members are rotatably connected to each of two the link rotation axes, and, when the pair of forceps members are in the closed state, the link members are parallel to each other.

4. The treatment tool for endoscope according to claim 2, wherein

the connection member includes two of the link rotation axes, and axes of the link rotation axes are parallel with each other in a direction of separating from the axis of the operation wire;

and

second end parts of the pair of link members are rotatably connected to each of two the link rotation axes, and, when the pair of forceps members are in the closed state, the link members are parallel to each other.