Flexible tube assembly for endoscope

摘要

A flexible tube assembly for an endoscope has outer diameter D and includes a helical tube constituted by a helically wound belt-like member having width l and thickness t. The helical tube has inner diameter d, and gaps s are formed between adjacent coils of the belt-like member of the helical tube. Gap s satisfies the following inequalty: 3>/=s>/=l (d/2+t)/(30+D/2-d/2-t) (mm) A net tube covers the outer surface of the helical tube. An outer sheath covers the outer surface of the net tube.