LINEAR CUTTING STAPLER

• US 20130264370A1
• Filed: 11/29/2011
• Published: 10/10/2013
• Est. Priority Date: 12/16/2010
• Status: Active Grant

• Current Assignee: Touchstone International Medical Science Co. Ltd
• Original Assignee: Touchstone International Medical Science Co. Ltd
• Inventors: Chen, Wangdong, Zhou, Jing, Fu, Kaifen
• Granted Patent: US 9,700,315 B2
• Time in Patent Office: Days
• US Class Current: 227/175.2
• CPC Class Codes: A61B 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 90/03 Automatic limiting or abutting means, e.g. for safety

Abstract

A linear cutting stapler comprises: an upper jaw and a lower jaw (5) capable of closing or opening relative to each other. A staple cartridge (51) is disposed at a distal end of the lower jaw (5). The lower jaw (5) is U-shaped, and has a staple driving rod (3) and a blade driving rod (4) slidably disposed therein. The linear cutting stapler further comprises a safety mechanism. The safety mechanism comprises an engagement member. A notch fitting the engagement member is disposed on a bottom surface of the staple driving rod (3). The safety mechanism further comprises a floating block (1). The floating block (1) may perform longitudinal displacement in the lower jaw (5). When the floating block (1) is pressed against the staple cartridge (51) or an anvil (6), a top end of the engagement member is driven to perform longitudinal displacement, so that the engagement member is separated from the notch. The linear cutting stapler has a simple structure, is easy to be fabricated, and is safe and reliable.

Claims

1. A linear cutting stapler, comprising an upper jaw and a lower jaw capable of being closed or opened relative to each other, with a staple cartridge being provided at a distal end of the lower jaw, the lower jaw having a U shape and being provided therein slidably with a staple pushing bar and a cutter pushing bar,

wherein the linear cutting stapler further comprises a safety mechanism comprising an engaging member, a bottom surface of the staple pushing bar is provided with a notch to be engaged with the engaging member;

the safety mechanism further comprises a floating block displaceable longitudinally in the lower jaw such that when the floating block abuts against the staple cartridge or a staple anvil to drive a longitudinal displacement of a top end of the engaging member, the engaging member is disengaged from the notch.

2. The linear cutting stapler according to claim 1, wherein a bottom end of the floating block is connected to the top end of the engaging member, and a bottom end of the engaging member is connected to the lower jaw, a first through slot and a second through slot for the staple pushing bar and the cutter pushing bar to pass through respectively are provided on the floating block in an axial direction.

3. The linear cutting stapler according to claim 2, wherein a protrusion to be pressed by the staple cartridge is provided at a distal end of the floating block, and wherein by pressing the protrusion, the staple cartridge drives the top end of the engaging member to displace longitudinally, so that the engaging member is disengaged from the notch.

4. The linear cutting stapler according to claim 2, wherein a protrusion to be pressed by the staple anvil is provided at a proximal end of the floating block, and wherein by pressing the protrusion, the staple anvil drives the top end of the engaging member to displace longitudinally, so that the engaging member is disengaged from the notch.

5. The linear cutting stapler according to claim 1, wherein the engaging member is a leaf spring with a bottom end welded to an inner wall of the lower jaw and a top end fixedly connected to the floating block.

6. The linear cutting stapler according to claim 1, wherein the engaging member is an engaging block at a bottom portion of the floating block, with a top end of the engaging block being engaged with the notch, and a bottom end of the engaging block being connected to a bottom surface of the lower jaw by a spring, and wherein when the floating block abuts against the staple cartridge or the staple anvil to drive a longitudinal displacement of the engaging member, a bottom portion of the engaging member is disengaged from the notch.

7. The linear cutting stapler according to claim 6, wherein the engaging block and the floating block are manufactured integrally.

8. The linear cutting stapler according to claim 1, wherein the engaging member is connected to the center of a bottom surface of the lower jaw, and the notch is correspondingly arranged at the center of a bottom surface of the staple pushing bar.

9. The linear cutting stapler according to claim 1, wherein a kidney-shaped protrusion is provided on each of two sides of the floating block in an axial direction, and a kidney-shaped groove fitted with the kidney-shaped protrusion is provided on each of two inner side walls of the lower jaw, the kidney-shaped protrusion is movable longitudinally in the kidney-shaped groove.

10. The linear cutting stapler according to claim 2, wherein the engaging member is a leaf spring with a bottom end welded to an inner wall of the lower jaw and a top end fixedly connected to the floating block.

11. The linear cutting stapler according to claim 3, wherein the engaging member is a leaf spring with a bottom end welded to an inner wall of the lower jaw and a top end fixedly connected to the floating block.

12. The linear cutting stapler according to claim 4, wherein the engaging member is a leaf spring with a bottom end welded to an inner wall of the lower jaw and a top end fixedly connected to the floating block.

13. The linear cutting stapler according to claim 2, wherein the engaging member is connected to the center of a bottom surface of the lower jaw, and the notch is correspondingly arranged at the center of a bottom surface of the staple pushing bar.

14. The linear cutting stapler according to claim 3, wherein the engaging member is connected to the center of a bottom surface of the lower jaw, and the notch is correspondingly arranged at the center of a bottom surface of the staple pushing bar.

15. The linear cutting stapler according to claim 4, wherein the engaging member is connected to the center of a bottom surface of the lower jaw, and the notch is correspondingly arranged at the center of a bottom surface of the staple pushing bar.