Endoscope

DETAILED DESCRIPTION OF THE EMBODIMENT Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG.
1 shows an entire view of an endoscope 1000 according to an embodiment of the present invention.
The endoscope 1000 includes an insertion section 1 to be inserted in a human cavity, and an operation unit 3 provided with operation members such as a bending knob 6 and a direction knob 8.
The insertion section 1 is formed with a bendable portion 4 at a tip end portion thereof.
By operation the bending knob 3 provided on the operation unit 3, bending amount of the bendable portion 4 is changed arbitrarily and remotely.
Through the insertion section 1 and the bendable section 4, an instrument-inserting channel 2 is formed by a tube member made of electrically insulating material such as tetrafluoroethylene.
A treatment instrument inlet 7 is provided at about a position where the insertion section 1 and the operation unit 3 are connected, and the proximal end of the instrument-inserting channel 2 is connected to the inlet 7.
The other end of the channel 2 is located at a tip portion 1a of the insertion section 1.
Various types of treatment accessories can be inserted in the instrument-inserting channel 2.
In the present embodiment, a high frequency treatment instrument 100 to which a high frequency electrical current flows when a diseased portion is to be treated is used.
A tip end 100a of the treatment instrument 100 protrudes aside at the tip portion 1a of the insertion section 1.
The direction in which the treatment instrument 100 protrudes is varied/adjusted by a direction setting table 5 accommodated in the tip portion 1a of the insertion section 1.
The direction setting table 5 changes the direction of the protruded treatment instrument 100 as an operation wire is proceeded/retracted by operating the direction knob 8.
FIG.
2 is a perspective view of the tip portion 1a of the insertion section 1.
In particular, FIG.
2 shows a condition in which a cap 11 is removed from a tip end body 12