Patent ID: 6162207
Filing Date: 2000-12-19
Classification: A61B

Abstract:
An operating unit adapted for an endoscopic treatment tool, said endoscopic treatment tool having a medical or surgical treatment mechanism driven by movement of a connecting wire, said operating unit comprising:a cylindrical body;a finger-retaining portion axially movably arranged on said cylindrical body;a coupling member arranged axially movably on said cylindrical body, said coupling member adapted to fixedly receive an end of said connecting wire thereon; anda motion converting mechanism connecting said finger-retaining portion to said coupling member, wherein said motion converting mechanism converts axial movement of said finger-retaining portion into a different amount of axial movement of said coupling member with a certain magnification; andwherein said motion converting mechanism includes:a first rack formed on said cylindrical body;a second rack formed on said coupling member; anda pinion rotatably supported on said finger-retaining portion, said pinion meshing with both said first and second racks.