Patent ID: 9486124
Filing Date: 2016-11-08
CPC Classification: A61B,G02B

Claim Text:
1. An advance and retreat assist tool for an endoscopic treatment instrument, the advance and retreat assist tool comprising: a base unit including a part where the endoscopic treatment instrument to be inserted into an endoscope passes, the base unit being fixed to the endoscope to face a treatment instrument insertion hole portion of the endoscope; a first tubular member provided coaxially with a central axis of the treatment instrument insertion hole portion, the endoscopic treatment instrument being inserted into and fixed to the first tubular member; a rotary portion into which the first tubular member is inserted, the rotary portion rotates around an axis of the first tubular member; an advance and retreat mechanism configured to convert a rotation force during the rotation of the rotary portion to an advance and retreat force along an axial direction of the first tubular member to advance and retreat the first tubular member; a support unit which supports the first tubular member so that the first tubular member is advanced and retreated by the advance and retreat mechanism; and a hinge mechanism pivotally connecting the base unit and the support unit, the hinge mechanism pivots the support unit between a first position and a second position, wherein: