An electric anastomat capable of preventing secondary firing
By introducing a secondary firing prevention unit and a pusher guide unit into the electric stapler, and utilizing damping grooves, electromagnets, and rack and pinion structures, the problem of secondary firing in traditional electric staplers has been solved, achieving stable and safe stapler operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 江苏慧玥智科技有限公司
- Filing Date
- 2026-04-20
- Publication Date
- 2026-06-16
Smart Images
Figure CN122208218A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of anastomosis device technology, specifically to an electric anastomosis device that can prevent secondary firing. Background Technology
[0002] Surgical staplers (including linear cutting staplers, linear staplers, and circular staplers) are widely used for the transection, cutting, and anastomosis of tissues such as the gastrointestinal tract, lungs, and blood vessels. With the development of minimally invasive surgery, staplers have gradually evolved from traditional manual drive to electric drive. Electric staplers typically use a motor, reduction mechanism, and transmission components (such as lead screws / racks / connecting rods) to drive the firing mechanism, causing the staple pusher to shape the staples and simultaneously driving the blade to complete tissue cutting. This reduces the operator's hand burden and improves firing stability and consistency.
[0003] Traditional electric staplers use a mechanical return design, meaning the pusher lever automatically returns to its original position after pushing the staples. This return mechanism is typically achieved through a spring or built-in mechanical device. After the staple pushing action is complete, the pusher lever returns to its original position using spring force or other mechanical force, preparing for the next push. However, this return can cause the staples to be pushed again, resulting in a secondary impact, which can lead to unnecessary injury, tissue damage, or even stapler failure. Summary of the Invention
[0004] The purpose of this invention is to provide an electric stapler that can prevent secondary firing, thereby solving the problems mentioned in the background art.
[0005] The main technical problem solved by this invention is: Because repositioning may cause the staples to be pushed again, resulting in a secondary firing, which can lead to unnecessary injury, tissue damage, or even failure of the anastomosis.
[0006] This invention can be achieved through the following technical solutions: An electric stapler that can prevent secondary firing includes a housing, a fixed handle at the lower part of the housing, a hollow straight tube connected to the front end of the housing, and a stapler mechanism installed at the front end of the straight tube. The anastomosis mechanism includes a staple cartridge clamp plate, the lower surface of which is engaged with a staple cartridge, and the bottom surface of the staple cartridge clamp plate is hinged with an anti-staple seat that abuts against the staple cartridge. The staple cartridge clamp has a limiting cavity inside, a staple pushing guide unit inside the limiting cavity, and several anti-secondary firing units at the bottom of the limiting cavity for pushing out the matching staples in the staple cartridge. The anti-secondary firing unit includes ejector slots, each ejector slot having a pusher rod slidably mounted inside, and each ejector slot having an inwardly mounted damping groove on its inner wall. The pusher rod has a damping block slidably connected to the damping groove on its outer side, and an outwardly protruding head on the center of its bottom surface.
[0007] A further technical improvement of the present invention is that: the pusher guide unit includes a guide rail disposed on the top of the limiting cavity, and an automatically resetting pusher slider is slidably disposed on the guide rail, and a pushing part is provided on one side of the bottom surface of the pusher slider to push against any one of the pusher rods.
[0008] A further technical improvement of the present invention is that a limiting rod is provided below the guide rail, the outside of the limiting rod is slidably sleeved with the push pin slider, and a spring is sleeved on the outside of the limiting rod and connected to one end of the push pin slider and the inner wall of the limiting cavity.
[0009] A further technical improvement of the present invention is that: a through groove is provided on the end face of the staple cartridge clamp and one end adjacent to the straight tube; a push rod is provided inside the housing to extend into the straight tube and push the staple pusher slider to move; and an execution unit is installed inside the housing. The push rod slides along the upper inner wall of the straight tube.
[0010] A further technical improvement of the present invention is that the execution unit includes a lead screw driven by a built-in servo motor, a sleeve block is threaded onto the external thread of the lead screw, a connecting rod is fixed to one side of the bottom of the sleeve block, and the end of the connecting rod is fixed to a push rod.
[0011] A further technical improvement of the present invention is that: a positioning block extending into the limiting cavity is installed on the upper part of the staple cartridge, and a locking hole is provided through the upper surface of the positioning block; An electromagnet is installed on the lower wall of the inner cavity of the limiting cavity, and the pushing end of the electromagnet is connected to a positioning element that extends into the card hole.
[0012] A further technical improvement of the present invention is that: the staple cartridge clamp and the anvil are rotatably connected by a rotating shaft, the outer wall of the rotating shaft is fixed with a toothed block, and the rotating end of the anvil is provided with an opening; The inner cavity of the straight tube is fixed with a limiting seat, and the inner limiting seat has a sliding limiting plate. A rack is installed on the upper surface of the limiting plate, and the rack passes through the opening and meshes with the toothed block.
[0013] A further technical improvement of the present invention is that: a support plate is installed inside the housing, and a miniature electric actuator is fixed on one side of the support plate, and the pushing end of the miniature electric actuator is fixed to the limiting plate.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up an anti-secondary firing unit, as the pusher guide unit advances, the pusher rod slides along the ejection groove, and the protrusion pushes the staples in the staple cartridge into the anastomotic tissue. During this process, the damping block slides in the damping groove, smoothing the movement of the pusher rod, avoiding violent impact during movement, reducing damage to the tissue, and effectively reducing vibration during operation. Due to the damping effect, the pusher rod will not reset when each staple is pushed, avoiding unnecessary rebound and jamming caused by excessive or uneven pushing force. The pusher rod will not reset each time the staple is pushed, preventing secondary firing caused by return to the original position, avoiding potential risks caused by secondary firing. The pusher guide unit ensures the correct sliding path of the pusher rod, ensures the correct ejection direction of each staple, and ensures smooth advancement. 2. When the electromagnet is energized, the positioning component retracts, installing the staple cartridge into the stapler. At this time, the positioning block extends into the limiting cavity. Then, when the electromagnet is de-energized, the positioning component extends out and enters the inside of the locking hole under the return spring, precisely locking the positioning block, thereby stabilizing the staple cartridge and preventing the staple cartridge from loosening or misaligning during the staple pushing process. 3. The miniature electric actuator pushes the limiting plate to slide along the limiting seat. As the limiting plate moves, the rack drives the toothed block to rotate. Since the rack and toothed block mesh, the rotation of the toothed block drives the anvil seat to rotate accordingly, ensuring that the anvil seat can rotate in a precise position each time the anvil is pushed, thereby completing the anastomosis of the tissue. This achieves precise control of the anvil seat and avoids misalignment caused by misoperation or vibration during the anvil pushing process. Attached Figure Description
[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the staple cartridge clamp of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 4 For the present invention Figure 2 A magnified view of a section at point B in the middle; Figure 5 For the present invention Figure 2 A magnified view of a section at point C.
[0017] In the diagram: 1. Housing; 2. Fixed handle; 3. Attachment cartridge clamp; 4. Attachment seat; 5. Straight tube; 6. Attachment cartridge; 7. Rack; 8. Miniature electric actuator; 9. Connecting rod; 10. Lead screw; 11. Sleeve block; 12. Push rod; 13. Attachment pusher slider; 14. Pushing part; 15. Attachment pusher rod; 16. Electromagnet; 17. Positioning component; 18. Positioning block; 19. Locking hole; 20. Protrusion; 21. Damping block; 22. Limiting rod; 23. Guide rail; 24. Spring; 25. Through groove; 26. Limiting seat; 27. Tooth block; 28. Opening. Detailed Implementation
[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.
[0019] Please see Figures 1-5 As shown, the present invention provides an electric stapler that can prevent secondary firing, including a housing 1, a fixed handle 2 at the lower part of the housing 1, and a hollow straight tube 5 connected to the front end of the housing 1, with a stapler mechanism installed at the front end of the straight tube 5. The anastomosis mechanism includes a staple cartridge clamp 3, a staple cartridge 6 is snapped onto the lower surface of the staple cartridge clamp 3, and a staple abutment 4 is hinged to the bottom surface of the staple cartridge clamp 3 to abut against the staple cartridge 6. The staple cartridge clamp 3 has a limiting cavity inside, the limiting cavity has a pusher guide unit inside, and the bottom of the limiting cavity has several anti-secondary firing units for pushing the matching staples in the staple cartridge 6 out. The anti-secondary firing unit includes ejector slots, each ejector slot has a pusher rod 15 slidably mounted inside, and each ejector slot has an inwardly mounted damping groove on its inner wall. The pusher rod 15 has a damping block 21 slidably connected to the damping groove on its outer side, and the pusher rod 15 has an outwardly protruding head 20 at the center of its bottom surface.
[0020] Before the stapler operates, the staple cartridge 6 is inserted into the staple cartridge clamp 3, and the stapler mechanism begins to work. At this time, the staple abutment 4 rotates against the stapled tissue to ensure that the stapler can firmly fix the tissue and prevent loosening during the stapler operation. As the staple pusher guide unit advances, the staple pusher rod 15 slides along the ejection groove, and the protrusion 20 pushes the staples in the staple cartridge 6 into the stapled tissue. During this process, the damping block 21 slides in the damping groove to smooth the movement of the staple pusher rod 15, avoid violent impact during the movement, reduce damage to the tissue, and effectively reduce vibration during the operation. Due to the damping effect, the staple pusher rod 15 will not return to its original position when the staple is pushed, avoiding unnecessary rebound and jamming caused by excessive or uneven pushing force.
[0021] Each time the staples are pushed, the push rod 15 does not return to its original position, preventing secondary firing due to repositioning. This makes the operation of the stapler more stable and safe. During repeated use, it can effectively avoid the potential risks caused by secondary firing. The staple guide unit ensures the correct sliding path of the push rod 15, ensuring the correct ejection direction of each staple and smooth advancement, reducing the risk of misalignment or deviation, and accurately entering the target tissue to achieve the expected anastomosis effect. The staples will not malfunction during the pushing process, minimizing the probability of errors and failures.
[0022] See Figure 3 and Figure 4 As shown, the pusher guide unit includes a guide rail 23 located at the top of the limiting cavity, a pusher slider 13 that automatically resets is slidably mounted on the guide rail 23, and a pushing part 14 on one side of the bottom surface of the pusher slider 13 that is engaged with any pusher rod 15. A limiting rod 22 is provided below the guide rail 23. The outside of the limiting rod 22 is slidably sleeved with the push pin slider 13. A spring 24 is sleeved on the outside of the limiting rod 22 and is connected to one end of the push pin slider 13 and the inner wall of the limiting cavity.
[0023] When the electric stapler starts working, the motor drives the staple pusher slider 13 to slide along the guide rail 23. The contact between the pusher part 14 on the bottom surface of the staple pusher slider 13 and the staple pusher rod 15 causes the staple pusher rod 15 to slide along the ejection groove, ejecting the staples in the staple cartridge 6, ensuring the accurate pushing of the staple pusher rod 15. And due to the guidance of the staple pusher slider 13 on the guide rail 23, the staple pusher rod 15 can move stably along the correct path. When the pusher slider 13 completes one push action and compresses the spring 24 until it reaches the end of the limiting cavity, completing the firing of all the anastomotic staples, the pusher slider 13 is pulled back to the initial position by the reset of the spring 24, providing a reset for the next push action.
[0024] See Figure 2 and Figure 4 As shown, the end face of the staple cartridge clamp 3 and one end adjacent to the straight tube 5 are provided with a through groove 25. The inside of the housing 1 is provided with a push rod 12 that extends into the straight tube 5 and pushes the pusher slider 13 to move. An execution unit is installed inside the housing 1. The push rod 12 slides along the upper inner wall of the straight tube 5 to a limit.
[0025] When the execution unit is started, the push rod 12 begins to slide along the inner wall of the straight tube 5. After passing through the through groove 25, the push rod 12 pushes the pusher slider 13, causing the pusher slider 13 to slide along the guide rail 23, pushing the pusher rod 15, and thus ejecting the matching nails in the nail magazine 6. The through groove 25 provides a connection channel between the push rod 12 and the pusher slider 13. Since the sliding of the push rod 12 is restricted to the inner wall of the straight tube 5, the risk of excessive sliding or displacement of the push rod 12 is avoided, ensuring the smooth progress of the entire pusher process.
[0026] See Figure 2 As shown, the execution unit includes a lead screw 10 driven by a built-in servo motor. A sleeve block 11 is threaded onto the external thread of the lead screw 10. A connecting rod 9 is fixed to one side of the bottom of the sleeve block 11. The end of the connecting rod 9 is fixed to the push rod 12.
[0027] The built-in servo motor drives the lead screw 10 to rotate, causing the outer sleeve 11 to move along the top surface of the inner cavity of the housing 1. As the sleeve 11 moves axially, the connecting rod 9 also moves and is transmitted to the push rod 12 through the connecting rod 9. The push rod 12 slides along the inner wall of the straight tube 5, thereby pushing the push pin slider 13.
[0028] See Figure 3 As shown, a positioning block 18 extending into the limiting cavity is installed on the upper part of the staple cartridge 6, and a locking hole 19 is provided through the upper surface of the positioning block 18. An electromagnet 16 is installed on the lower wall of the inner cavity of the limiting cavity, and the pushing end of the electromagnet 16 is connected to a positioning element 17 that extends into the slot 19.
[0029] Initially, when the electromagnet 16 is energized, the positioning component 17 retracts, installing the staple cartridge 6 into the stapler. At this time, the positioning block 18 extends into the limiting cavity. Then, when the electromagnet 16 is de-energized, the positioning component 17 extends out and enters the inside of the locking hole 19 under the return spring, precisely locking the positioning block 18, thereby stabilizing the staple cartridge 6 and preventing the staple cartridge 6 from loosening or misaligning during the staple pushing process.
[0030] See Figure 2 and Figure 5 As shown, the staple cartridge clamp 3 and the staple seat 4 are rotatably connected by a rotating shaft. The outer wall of the rotating shaft is fixed with a toothed block 27, and the rotating end of the staple seat 4 is provided with an opening 28. A limiting seat 26 is fixed inside the straight tube 5. A limiting plate slides inside the limiting seat 26. A rack 7 is installed on the upper surface of the limiting plate. The rack 7 passes through the opening 28 and meshes with the toothed block 27. A support plate is installed inside the housing 1, and a miniature electric actuator 8 is fixed on one side of the support plate. The pushing end of the miniature electric actuator 8 is fixed to the limiting plate.
[0031] When the miniature electric actuator 8 is started, it pushes the limiting plate to slide along the limiting seat 26. As the limiting plate moves, the rack 7 drives the toothed block 27 to rotate. Since the rack 7 and the toothed block 27 mesh, the rotation of the toothed block 27 drives the anvil seat 4 to rotate accordingly, ensuring that the anvil seat 4 can rotate in a precise position each time the nail is pushed, thereby completing the tissue anastomosis. This achieves precise control of the anvil seat 4 and avoids misalignment caused by misoperation or vibration during the nail pushing process.
[0032] In use, this invention employs an anti-secondary firing unit. As the pusher guide unit advances, the pusher rod 15 slides along the ejection groove, and the protrusion 20 pushes the staples in the staple cartridge 6 into the anastomotic tissue. During this process, the damping block 21 slides in the damping groove, smoothing the movement of the pusher rod 15, avoiding violent impacts during movement, reducing damage to the tissue, and effectively reducing vibration during operation. Due to the damping effect, the pusher rod 15 does not reset each time the staple is pushed, avoiding unnecessary rebound and jamming caused by excessively fast or uneven pushing force. The pusher rod 15 does not reset each time the staple is pushed, preventing secondary firing due to return to its original position and avoiding potential risks caused by secondary firing. The pusher guide unit ensures the correct sliding path of the pusher rod 15, ensuring the correct ejection direction of each staple and smooth advancement. When the electromagnet 16 is energized, the positioning component 17 retracts, installing the staple cartridge 6 into the stapler. At this time, the positioning block 18 extends into the limiting cavity. Then, when the electromagnet 16 is de-energized, the positioning component 17 extends out and enters the inside of the locking hole 19 under the return spring, precisely locking the positioning block 18, thereby stabilizing the staple cartridge 6 and preventing the staple cartridge 6 from loosening or misaligning during the staple pushing process. The miniature electric actuator 8 pushes the limiting plate to slide along the limiting seat 26. As the limiting plate moves, the rack 7 drives the toothed block 27 to rotate. Since the rack 7 meshes with the toothed block 27, the rotation of the toothed block 27 drives the anvil seat 4 to rotate accordingly, ensuring that the anvil seat 4 can rotate in a precise position each time the nail is pushed, thereby completing the tissue anastomosis. This achieves precise control of the anvil seat 4 and avoids misalignment caused by misoperation or vibration during the nail pushing process.
[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. An electric stapler capable of preventing secondary firing, comprising a housing (1), wherein a fixed handle (2) is provided at the lower part of the housing (1), characterized in that: The front end of the shell (1) is connected to a hollow straight tube (5), and the front end of the straight tube (5) is equipped with a matching mechanism; The anastomosis mechanism includes a staple cartridge clamp (3), on the lower surface of which a staple cartridge (6) is engaged, and on the bottom surface of the staple cartridge clamp (3) is a staple abutment (4) that abuts against the staple cartridge (6). The staple cartridge clamp (3) has a limiting cavity inside, the limiting cavity has a pusher guide unit inside, and the bottom of the limiting cavity has several anti-secondary firing units for pushing the matching staples in the staple cartridge (6) out. The anti-secondary firing unit includes an ejector slot, and each ejector slot has a pusher rod (15) slidably mounted inside. The inner wall of each ejector slot is provided with a damping groove. The outside of the pusher rod (15) is provided with a damping block (21) slidably connected to the damping groove. The bottom surface of the pusher rod (15) is provided with an outwardly protruding head (20).
2. The electric stapler for preventing secondary firing according to claim 1, characterized in that, The pusher guide unit includes a guide rail (23) located at the top of the limiting cavity. A pusher slider (13) with automatic reset is slidably provided on the guide rail (23). A pusher part (14) is provided on one side of the bottom surface of the pusher slider (13) to push against any pusher rod (15).
3. The electric stapler for preventing secondary firing according to claim 2, characterized in that, A limiting rod (22) is provided below the guide rail (23). The outside of the limiting rod (22) is slidably sleeved with the push pin slider (13). A spring (24) is sleeved on the outside of the limiting rod (22) and connected to one end of the push pin slider (13) and the inner wall of the limiting cavity.
4. The electric stapler for preventing secondary firing according to claim 2, characterized in that, The end face of the staple cartridge clamp (3) and one end adjacent to the straight tube (5) are provided with a through groove (25). The inside of the housing (1) is provided with a push rod (12) that extends into the straight tube (5) and pushes the pusher slider (13) to move. An execution unit is installed inside the housing (1). The push rod (12) slides along the upper inner wall of the straight tube (5).
5. The electric stapler for preventing secondary firing according to claim 4, characterized in that, The execution unit includes a lead screw (10) driven by a built-in servo motor. A sleeve block (11) is threaded onto the external thread of the lead screw (10). A connecting rod (9) is fixed to one side of the bottom of the sleeve block (11). The end of the connecting rod (9) is fixed to the push rod (12).
6. The electric stapler for preventing secondary firing according to claim 1, characterized in that, The upper part of the staple cartridge (6) is equipped with a positioning block (18) that extends into the limiting cavity, and the upper surface of the positioning block (18) is provided with a through hole (19). An electromagnet (16) is installed on the lower wall of the inner cavity of the limiting cavity, and the pushing end of the electromagnet (16) is connected to a positioning element (17) that extends into the card hole (19).
7. The electric stapler for preventing secondary firing according to claim 1, characterized in that, The staple cartridge clamp (3) and the anvil seat (4) are rotatably connected by a rotating shaft. The outer wall of the rotating shaft is fixed with a toothed block (27), and the rotating end of the anvil seat (4) is provided with an opening (28). The inner cavity of the straight tube (5) is fixed with a limiting seat (26), and the inner limiting seat (26) has a limiting plate that slides. A rack (7) is installed on the upper surface of the limiting plate. The rack (7) passes through the opening (28) and meshes with the toothed block (27).
8. The electric stapler for preventing secondary firing according to claim 7, characterized in that, The housing (1) is equipped with a support plate inside, and a miniature electric actuator (8) is fixed on one side of the support plate. The pushing end of the miniature electric actuator (8) is fixed to the limiting plate.