US 12,433,586 B2
Safety mechanism for ensuring disposable use of an instrument
Menghui Liao, Shanghai (CN); Lei Wang, Shanghai (CN); Chuangang Tang, Shanghai (CN); Jun Yang, Shanghai (CN); Minghui Bao, Shanghai (CN); and Honglin Nie, Shanghai (CN)
Assigned to Ezisurg (Suzhou) Medical Co. Ltd., Jiangsu (CN)
Appl. No. 17/290,500
Filed by EZISURG (SUZHOU) MEDICAL CO. LTD., Jiangsu (CN)
PCT Filed Nov. 1, 2019, PCT No. PCT/CN2019/114937
§ 371(c)(1), (2) Date Nov. 29, 2021,
PCT Pub. No. WO2020/088629, PCT Pub. Date May 7, 2020.
Claims priority of application No. 201811303644.2 (CN), filed on Nov. 2, 2018.
Prior Publication US 2023/0181188 A1, Jun. 15, 2023
Int. Cl. A61B 17/072 (2006.01); A61B 90/00 (2016.01); A61B 17/00 (2006.01)
CPC A61B 17/072 (2013.01) [A61B 90/08 (2016.02); A61B 2017/0023 (2013.01); A61B 2017/07285 (2013.01); A61B 2090/0814 (2016.02)] 12 Claims
OG exemplary drawing
 
1. A surgical instrument comprising:
a safety mechanism for ensuring disposable use of a staple cartridge which is assembled into a staple cartridge base;
the safety mechanism including:
a sliding block which is assembled at a proximal end of the staple cartridge;
a cutter which comes into contact with a proximal end of the sliding block when the sliding block is at an initial position; and
a first guide structure provided on the cutter, a second guide structure provided on the sliding block and corresponding to the first guide structure, and a third guide structure provided on the cutter and separated from the first guide structure;
wherein the cutter is biased into a bias track of the staple cartridge base when the sliding block is at the initial position, and the second guide structure is configured to guide the first guide structure to a central position from a biased position, so that the cutter enters a central track of the staple cartridge base under guiding effect of the sliding block when the cutter continues moving forward; and
wherein the cutter is biased into the bias track of the staple cartridge base when the sliding block is not at the initial position, and when the cutter continues moving forwards, the third guide structure enters a blocking groove of the staple cartridge base, so that the cutter is restricted from moving forwards.