US 11,937,828 B2
Endoscope treatment device
Naoki Takizawa, Hirosaki (JP); and Motoi Satake, Kokubunji (JP)
Assigned to Olympus Medical Systems Corp., Tokyo (JP)
Filed by OLYMPUS MEDICAL SYSTEMS CORP., Tokyo (JP)
Filed on Jan. 14, 2022, as Appl. No. 17/575,883.
Claims priority of provisional application 63/141,620, filed on Jan. 26, 2021.
Prior Publication US 2022/0233197 A1, Jul. 28, 2022
Int. Cl. A61B 17/128 (2006.01); A61B 17/122 (2006.01)
CPC A61B 17/1285 (2013.01) [A61B 17/1227 (2013.01)] 20 Claims
OG exemplary drawing
 
11. An endoscope treatment device for ligaturing a living tissue, comprising:
a clip unit including a tube having an interior volume and at least one open end and a clip having a first arm portion and a second arm portion, and wherein the clip is configured to slidably move between a retracted position in which the first and second arm portions are within the interior volume of the tube and a deployed position in which the first and second arm portions protrude from the open end of the tube;
a linear member connected to the clip unit and provided to advance and retract the clip unit; and
a sheath in which the linear member is inserted so that the linear member is advanceable and retractable;
wherein the clip unit further includes:
an engagement mechanism disposed inside the tube and including a stepped connector and a hooking structure, wherein the engagement mechanism is configured to connect the clip,
wherein the stepped connector includes an engaging region connecting two side regions,
wherein a width of the engaging region of the stepped connector is smaller than a width of a first of the two side regions of the stepped connector,
wherein the hooking structure includes two lateral surfaces connected by a hook surface, and
wherein a surface of the engaging region of the stepped connector engages with the hook surface of the hooking structure and each of the two side regions of the stepped connector adjacent with a respective one of the two lateral surfaces of the hooking structure.