Endoscope suitable for autoclaving
An endoscope suitable for autoclaving in accordance with the present invention has a barrier that separates an interior from an exterior. When the barrier is located at a predetermined position, consideration is taken into a displacement of the barrier between the position of the barrier observed before start of autoclaving and the position thereof observed after completion of the autoclaving during which predetermined pressure is applied and a thermal load is imposed.
1. An endoscope suitable for autoclaving comprising:
an elongate flexible tube having a distal end and a proximal end;
a cylindrical elastic member having a distal end and a proximal end and having an inner space formed to communicate from the distal end to the proximal end, the elastic member being arranged such that the flexible tube is inserted in the inner space; and
a seal portion provided to seal the inner space at the distal end of the elastic member, the seal portion being engaged with a periphery of the flexible tube in order to keep the flexible tube fluid-tight,
wherein the seal portion separates from at least a portion of the periphery of the flexible tube in response to a predetermined pressure from the inner space of the elastic member to release the fluid-tight connection.
2. An endoscope according to claim 1 , wherein said predetermined pressure is pressure lower than pressure released at a decompression step of autoclaving.
3. An endoscope according to claim 1 , wherein an inner diameter, thickness and material of said seal portion are set to values that permit separation of said seal portion from said at least a portion of the periphery of the flexible tube.
4. An endoscope according to claim 1 , wherein said seal portion comprises a resin material.
5. An endoscope according to claim 1 , wherein a hard member is connected to the flexible tube at the proximal end side thereof, and the elastic member is arranged such as to cover a connecting portion of the flexible tube and the hard member.