US 12,256,925 B2
Closure driving mechanism and surgical stapler
Teng Shan, Suzhou (CN)
Assigned to Touchstone International Medical Science Co., Ltd., Suzhou (CN)
Appl. No. 17/634,785
Filed by Touchstone International Medical Science Co., Ltd., Suzhou (CN)
PCT Filed Aug. 27, 2020, PCT No. PCT/CN2020/111794
§ 371(c)(1), (2) Date Feb. 11, 2022,
PCT Pub. No. WO2021/037155, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 201910806818.5 (CN), filed on Aug. 29, 2019; and application No. 201921425066.X (CN), filed on Aug. 29, 2019.
Prior Publication US 2022/0330938 A1, Oct. 20, 2022
Int. Cl. A61B 17/072 (2006.01); A61B 17/068 (2006.01); A61B 17/00 (2006.01); A61B 17/115 (2006.01)
CPC A61B 17/068 (2013.01) [A61B 17/072 (2013.01); A61B 17/07207 (2013.01); A61B 2017/00407 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/07214 (2013.01); A61B 17/115 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A closure driving mechanism used for a surgical stapler having a head assembly, wherein the mechanism comprises a first slider, a locking member, a closure driver, a pushing block, a firing handle and a pressing member, the first slider is connected to the closure driver and comprises a first fitting portion, the locking member comprises a second fitting portion and a first lifting portion connected to each other, the pushing block comprises a second lifting portion located under the first lifting portion; one of the first fitting portion and the second fitting portion is a boss, and the other one is a groove; wherein in an initial state, the first fitting portion is located at a proximal side of the second fitting portion, and the pressing member is located at a proximal side of the locking member;
wherein, when the firing handle is actuated in the initial state, the first slider moves distally, the first fitting portion is moved to be under the second fitting portion, the pressing member moves distally and presses the locking member downwards, the second fitting portion is moved downwards to fit with the first fitting portion, and the first slider moves the closure driver proximally to close the stapler, therefore, when the head assembly is closed, the first fitting portion is under and fits with the second fitting portion; when the pushing block is lifted upwards, the second lifting portion lifts the first lifting portion upwards, thereby moving the second fitting portion upwards to separate from the first fitting portion.