Takayuki NAKAMURA,Tsuyoshi ASHIDA,Yasunori OHTA,Shinichi YAMAKAWA,Charles Alan BRANTINGHAM
申请号：
US13936698
公开号：
US20140107419A1
申请日:
2013.07.08
申请国别(地区):
US
年份:
2014
代理人:
摘要：
An assist assembly for propulsion of a tip device of an endoscope in a body cavity includes an attachment sleeve and a support sleeve. A deformable circulation device is disposed to extend over inner and outer surfaces of the support sleeve, for endlessly moving in an axial direction of the tip device. Plural rollers are disposed on the support sleeve in a rotatable manner, for pressing an inner surface of the circulation device. An alignment projection is formed on the inner surface of the circulation device to project at a height L1. A location offset prevention groove is formed in the rollers at a depth L2, for receiving the alignment projection, and satisfying a condition L1≧L2, to prevent location offset of the circulation device from the rollers. Drive wheels tension the circulation device in cooperation with the rollers by deforming the alignment projection in the location offset prevention groove.
