Patent ID: 6951560

Claim:
A bipolar high frequency treatment tool having an inserting portion for insertion into a body cavity through an endoscope, comprising: a supporting member attached to a distal end of said inserting portion, a slit being formed by said supporting member, said slit having first and second inner side surfaces facing each other; first and second electrodes within said slit of said supporting member and movable between open and closed positions, front portions of said first and second electrodes extending from said slit, said front portions contacting each other in said closed position and being spaced from each other in said open position; an insulating block having substantially a same width as said slit and being located within said slit between said first and second electrodes, said insulating block having first and second side surfaces facing said first and second inner side surfaces of said slit, respectively, said first and second side surfaces being deformed to define first and second spaces between said insulating block and said first and second inner side surfaces of said slit for receiving said first and second electrodes, respectively; and first and second pins held by said supporting member within said slit parallel to and spaced from each other, wherein said first and second electrodes are pivotably mounted to said first and second pins, wherein said insulating block has first and second through holes extending substantially perpendicularly to said first and second side surfaces of said insulating block, said insulating block being mounted to said supporting member by said first and second pins extending through said first and second through holes, respectively.