US 12,082,816 B2
Closure driving mechanism and surgical stapler
Teng Shan, Suzhou (CN)
Assigned to Touchstone International Medical Science Co., Ltd., Suzhou (CN)
Appl. No. 17/634,780
Filed by Touchstone International Medical Science Co., Ltd., Suzhou (CN)
PCT Filed Aug. 27, 2020, PCT No. PCT/CN2020/111791
§ 371(c)(1), (2) Date Feb. 11, 2022,
PCT Pub. No. WO2021/037153, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 201910806837.8 (CN), filed on Aug. 29, 2019; and application No. 201921425349.4 (CN), filed on Aug. 29, 2019.
Prior Publication US 2022/0323077 A1, Oct. 13, 2022
Int. Cl. A61B 17/115 (2006.01)
CPC A61B 17/115 (2013.01) 14 Claims
OG exemplary drawing
 
1. A closure driving mechanism used for a surgical stapler, wherein the mechanism comprises a firing handle, a first slider, a locking member, a closure driver, and an actuating rod, wherein the actuating rod is provided with a pressing portion and an avoiding portion, wherein the avoiding portion is located on a proximal end of the pressing portion, wherein in an initial state, the pressing portion, the avoiding portion and at least a part of the first slider are all located at a proximal side of the locking member, wherein stapler comprises a pulling sheet;
when the firing handle is actuated in the initial state, the first slider is moved distally by the firing handle until the first slider is under the locking member, thereby the first slider moves the closure driver to drive the pulling sheet to move proximally, wherein the firing handle drives the actuation rod to move the pressing portion distally, then the pressing portion contacts and presses the locking member downwards to fit with the first slider;
after the stapler being fired, the pressing portion is moved to a distal side of the locking member, and the avoiding portion is moved to be above the locking member, allowing the locking member to move upwards and at least partially enter the avoiding portion, to separate from the first slider.