An electric stapler for preventing reuse

Abstract

The present invention relates to the technical field of staplers, and discloses an electric stapler for preventing reuse, which includes a stapler main body, and an opening and closing drive assembly, a locking assembly, and a locking reset assembly are arranged inside the stapler main body. For this electric stapler for preventing reuse, the opening and closing state of the cartridge assembly is adjusted by the opening and closing drive assembly. When the firing drive assembly is not activated, the opening and closing drive assembly can reciprocate to drive the cartridge assembly to open and close repeatedly, which is convenient for medical staff to adjust the opening and closing state of the cartridge assembly multiple times to achieve the best clamping state when the clamped anastomotic tissue is not in place, improving the suturing effect. When the firing drive assembly is activated, the cartridge assembly resets and opens to facilitate the removal of the anastomosed tissue. Under the limiting effect of the linear drive mechanism, the opening and closing drive assembly cannot continue to move, and the opened cartridge assembly cannot be closed again. The stapler that has fired staples cannot clamp tissue again, effectively preventing the stapler from being reused and avoiding cross-infection.

Description

Technical Field

[0001] The present invention relates to the technical field of staplers, and particularly to an electric stapler that prevents reuse. Background Art

[0002] The laparoscopic stapler is one of the important instruments for laparoscopic surgery. It replaces traditional manual suturing and uses titanium staples to cut or anastomose tissues. It is easy and rapid to operate, greatly shortening the operation time. The laparoscopic stapler makes it easy to perform anastomosis in a narrow surgical field and at a deep location where manual operation is difficult, and is accurate, firm and reliable, significantly reducing the incidence of anastomotic leakage. According to different power transmission methods, staplers can be divided into manual and electric types. Different from the mechanical control of traditional manual laparoscopic staplers, the electric laparoscopic stapler cuts tissues between two staples while firing the anastomosis staples through power sensing. The electric laparoscopic stapler can drive in three rows of staggered anastomosis staples on both sides and is equipped with a disposable lithium battery pack.

[0003] The electric laparoscopic stapler acts on the human body. After one operation, there will be some human blood and tissue fluid on its surface and internal gaps, making it easy to cause cross-infection when the stapler is reused. Therefore, its reuse should be avoided. However, the existing electric laparoscopic stapler does not have a corresponding protection mechanism to prevent reuse, and it is impossible to distinguish between a stapler that has undergone one operation and a stapler that has not been used. If the management of medical instruments is not strict and the two are placed together, medical staff are likely to get and reuse the used stapler, seriously affecting the health of patients. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides an electric stapler that prevents reuse, which has the advantages that the staple cartridge assembly can be repeatedly opened and closed before firing the anastomosis staples to facilitate adjusting the clamping effect on tissues, and the staple cartridge assembly that has been fired and reset to open cannot be closed again, solving the problem that the existing electric stapler cannot prevent reuse and is prone to cause cross-infection.

[0006] (2) Technical Solutions

[0007] To solve the above technical problems that the existing electric stapler cannot prevent reuse and is prone to cause cross-infection, the present invention provides the following technical solutions:

[0008] An electric stapler for preventing reuse, comprising a stapler body, wherein an opening and closing drive assembly, a locking assembly, a locking reset assembly, a linear drive mechanism, and a firing drive assembly are arranged inside the stapler body. The opening and closing drive assembly is used to adjust the opening and closing state of the cartridge assembly. When the opening and closing drive assembly moves to a position where the cartridge assembly is closed, it can be limited and locked by the locking assembly. By pulling the locking reset assembly, the locking assembly can be driven to release the locking of the opening and closing drive assembly, so that the cartridge assembly automatically resets and opens;

[0009] The firing drive assembly is used to fire staples. When the firing drive assembly is not activated, the locking reset assembly can reciprocate freely, so that the unlocked opening and closing drive assembly can continue to drive the opening and closing of the cartridge assembly;

[0010] When the firing drive assembly is activated, after the locking reset assembly unlocks the opening and closing drive assembly, it can be limited and locked by the linear drive mechanism, so that the opening and closing drive assembly cannot continue to drive the cartridge assembly to close.

[0011] Preferably, the locking reset assembly includes a carrier plate, a manual reset key, and a push plate. The manual reset key and the push plate are respectively fixedly installed on the upper and lower sides of the carrier plate;

[0012] A pressure sensing mechanism is arranged on one side of the push plate. The pressure sensing mechanism starts and stops synchronously with the firing drive assembly. When the manual reset key is pulled to a position where the opening and closing drive assembly is just unlocked, the sensing end of the pressure sensing mechanism contacts the movable end of the linear drive mechanism, and when the pressure sensing mechanism detects pressure on its surface, it can start the linear drive mechanism;

[0013] When the firing drive assembly is activated, after the opening and closing drive assembly is unlocked, the movable end of the linear drive mechanism can automatically extend and maintain the extended length, so that the position of the push plate is locked.

[0014] Preferably, the opening and closing drive assembly includes a drive rod, a connecting frame, and a connecting plate that are fixedly connected in sequence. A fixed handle and a movable handle that can rotate relative to the fixed handle are arranged on the stapler body. By pulling the movable handle, the drive rod can be driven to move to close the cartridge assembly, and a reset elastic member is connected between the end of the connecting plate and the inner wall of the stapler body.

[0015] Preferably, the locking assembly includes a sector-shaped locking member, a rotating shaft, a fixed support plate, and a torsion spring. The two ends of the rotating shaft and the fixed support plate are respectively fixedly assembled on the inner wall of the stapler body. The sector-shaped locking member is rotatably assembled on the rotating shaft, and the torsion spring is arranged between the sector-shaped locking member and the fixed support plate;

[0016] The upper surface of the connecting plate is fixedly connected with a special-shaped limiting block. Under the elastic force of the torsion spring, when the staple cartridge assembly is in the fully open state and the fully closed state, the sector-shaped locking member can be in contact with the upper surface of the connecting plate and the special-shaped limiting block.

[0017] Preferably, the sector-shaped locking member includes a first support plate, a second support plate and an arc plate. The arc plate is fixedly installed between the first support plate and the second support plate. An assembly through hole is provided at the junction of the first support plate and the second support plate, and the rotating shaft is rotationally matched with the assembly through hole;

[0018] A through groove is provided on the surface of the second support plate. The width of the through groove is greater than the width of the fixed support plate. The torsion spring is sleeved on the rotating shaft, and the two torsion arms of the torsion spring are respectively attached to the first support plate and the fixed support plate.

[0019] Preferably, a locking contact surface is provided on one side of the special-shaped limiting block. The locking contact surface matches the surface profile of the arc plate. A driving contact surface is provided at the junction of the other side of the special-shaped limiting block and the upper surface of the special-shaped limiting block;

[0020] When the staple cartridge assembly is fully open, the driving contact surface is in contact with the lower surface of the first support plate. When the staple cartridge assembly is fully closed, the locking contact surface is in contact with the surface of the arc plate.

[0021] Preferably, a first rack is provided on the surface of the arc plate in an arc-shaped distribution, and a second rack is provided on the lower surface of the bearing plate in a linear distribution. The second rack and the first rack are meshed with each other.

[0022] Preferably, the movable handle includes an operating end, a triggering end and a fixed shaft. The two ends of the fixed shaft are respectively fixedly assembled on the inner wall of the stapler body. The operating end and the triggering end can rotate around the fixed shaft. A contact block is provided at one end of the connecting frame. Under the elastic action of the reset elastic member, the triggering end and the contact block can remain in contact.

[0023] Preferably, the firing drive assembly includes a drive motor, a driving shaft, a threaded lead screw and bevel gears. The two ends of the driving shaft and the threaded lead screw are respectively rotationally assembled inside the stapler body. The drive motor is used to directly drive the driving shaft to rotate. The driving shaft and the threaded lead screw are respectively fixedly sleeved with the meshed bevel gears. A firing rod is threadedly assembled on the threaded lead screw. The firing rod is used to directly fire the staple.

[0024] Preferably, a battery pack is provided on the stapler body. The battery pack is used to provide electrical energy for the stapler.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides an electric stapler that prevents reuse, having the following beneficial effects:

[0027] 1. For the electric stapler that prevents reuse, the opening and closing driving component is used to adjust the opening and closing state of the cartridge assembly. When the firing driving component is not started, the opening and closing driving component can reciprocate to drive the cartridge assembly to repeat closing and opening, facilitating medical staff to repeatedly adjust the opening and closing state of the cartridge assembly when the clamped anastomotic tissue is not in place to achieve the best clamping state of the anastomotic tissue, improving the suture effect on the tissue. When the firing driving component is started, the cartridge assembly resets and opens to facilitate the removal of the anastomosed tissue. Under the limiting effect of the linear driving mechanism, the opening and closing driving component cannot continue to move, and the opened cartridge assembly cannot be closed again. Thus, the stapler that has fired staples cannot clamp the tissue again, effectively preventing the stapler from being reused and avoiding cross-infection.

[0028] 2. For the electric stapler that prevents reuse, the locking and resetting component is used to drive the locking component to release the locking of the opening and closing driving component. When the manual reset key is pulled to the position where the opening and closing driving component is just unlocked, the sensing end of the pressure sensing mechanism contacts the moving end of the linear driving mechanism, and the firing driving component starts and stops synchronously with the pressure sensing mechanism. When the firing driving component is not started, the opening and closing of the cartridge assembly are not affected by the linear driving mechanism. After the firing driving component is started, when the pressure sensing mechanism contacts the moving end of the linear driving mechanism, a certain pressure can be detected on the surface of the pressure sensing mechanism, causing the moving end of the linear driving mechanism to automatically extend and remain in contact with the push plate, locking the locking and resetting component. Thus, both the locking component and the opening and closing driving component are locked, and the opened cartridge assembly cannot be closed again.

[0029] 3. For the electric stapler that prevents reuse, during the process of driving the cartridge assembly to close by the opening and closing driving component, as the special-shaped limiting block moves, the sector locking piece can rotate under the push of the driving contact surface. When the cartridge assembly is completely closed, the special-shaped limiting block can be limited and locked by the sector locking piece, preventing the special-shaped limiting block from automatically resetting. Thus, the cartridge assembly can maintain the closed state, ensuring that the cartridge assembly and the anvil can stably clamp the anastomotic tissue and saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a partial cross-sectional structural schematic diagram of the present invention;

[0031] Figure 2 is a three-dimensional structural schematic diagram of the present invention;

[0032] Figure 3 is of the present invention Figure 1 partial enlarged schematic diagram of part A in

[0033] Figure 4 Schematic structural diagram of the opening and closing drive assembly of the present invention;

[0034] Figure 5 Partial cross-sectional schematic diagram of the locking assembly and the locking reset assembly of the present invention;

[0035] Figure 6 Explosion schematic diagram of the locking assembly of the present invention;

[0036] Figure 7 Schematic structural diagram of the present invention in the state where the staple cartridge assembly is opened;

[0037] Figure 8 Schematic structural diagram of the present invention in the state where the staple cartridge assembly is closed.

[0038] In the figure: 1, stapler main body; 11, fixed handle; 12, movable handle; 121, operation end; 122, trigger end; 123, fixed shaft; 13, battery pack; 2, opening and closing drive assembly; 21, drive rod; 22, connecting frame; 221, contact block; 23, connecting plate; 24, special-shaped limiting block; 241, drive contact surface; 242, locking contact surface; 3, locking assembly; 31, sector-shaped locking member; 311, first support plate; 3111, first installation groove; 312, second support plate; 3121, through groove; 313, arc plate; 3131, first rack; 32, rotating shaft; 33, fixed support plate; 331, second installation groove; 34, torsion spring; 4, locking reset assembly; 41, bearing plate; 411, second rack; 42, manual reset key; 43, push plate; 431, pressure sensing mechanism; 5, reset elastic member; 6, linear drive mechanism; 7, firing drive assembly; 71, drive motor; 72, driving shaft; 73, threaded lead screw; 74, bevel gear. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figure 1 、 Figure 2, an electric stapler for preventing reuse, comprising a stapler body 1. Inside the stapler body 1, there are an opening and closing drive assembly 2, a locking assembly 3, a locking reset assembly 4, a linear drive mechanism 6, and a firing drive assembly 7. The opening and closing drive assembly 2 is used to adjust the opening and closing state of the cartridge assembly. When the opening and closing drive assembly 2 moves to a position where the cartridge assembly is closed, it can be limited and locked by the locking assembly 3, so that the cartridge assembly can remain closed, thereby ensuring that the cartridge assembly and the anvil can stably clamp the anastomosed tissue and saving manpower. By pulling the locking reset assembly 4, the locking assembly 3 can be driven to release the locking of the opening and closing drive assembly 2, and the cartridge assembly automatically resets and opens;

[0041] The firing drive assembly 7 is used to fire staples. When the firing drive assembly 7 is not activated, the locking reset assembly 4 can move back and forth freely, so that the locking assembly 3 can move back and forth freely, enabling the unlocked opening and closing drive assembly 2 to continue to drive the opening and closing of the cartridge assembly. Thus, after the opening and closing drive assembly 2 drives the closed cartridge assembly to reset and open, the opening and closing drive assembly 2 can continue to move back and forth to repeatedly drive the cartridge assembly to close and open, facilitating medical staff to adjust the opening and closing state of the cartridge assembly multiple times when the clamping of the anastomosed tissue is not in place, so as to achieve the best clamping effect of the cartridge assembly and the anvil on the anastomosed tissue, and further improve the suturing effect on the tissue;

[0042] When the firing drive assembly 7 is activated, after the locking reset assembly 4 unlocks the opening and closing drive assembly 2, it can be limited and locked by the linear drive mechanism 6, so that the opening and closing drive assembly 2 cannot continue to drive the cartridge assembly to close. Thus, after the firing drive assembly 7 fires the staples, by unlocking the position of the opening and closing drive assembly 2 by the locking reset assembly 4 to make the cartridge assembly reset and open for facilitating the removal of the anastomosed tissue, under the limiting action of the linear drive mechanism 6, the locking reset assembly 4 cannot continue to move back and forth. Furthermore, the locking reset assembly 4 cannot continue to drive the opening and closing drive assembly 2 to move through the locking assembly 3, and the opened cartridge assembly cannot be closed again. After the stapler that has activated the firing drive assembly 7 releases the anastomosed tissue when the cartridge assembly is opened, its cartridge assembly cannot be closed again, effectively preventing the reused stapler from being reused and avoiding cross-infection.

[0043] When the present invention is in use, the tissue to be anastomosed is placed between the staple cartridge assembly and the anvil. The opening and closing drive assembly 2 is driven to move so that the staple cartridge assembly is closed, and the tissue to be anastomosed is stably clamped between the staple cartridge assembly and the anvil. At this time, the locking assembly 3 can automatically lock the position of the opening and closing drive assembly 2. If the position of the clamped part of the tissue to be anastomosed is offset and the tissue needs to be clamped again, the locking reset assembly 4 is manually pulled. The locking reset assembly 4 can drive the locking assembly 3 to release the lock on the opening and closing drive assembly 2, so that the staple cartridge assembly automatically resets and opens. After adjusting the position of the tissue, the opening and closing drive assembly 2 is driven to move again so that the staple cartridge assembly is closed. Medical staff can repeatedly drive the staple cartridge assembly to open and close until the staple cartridge assembly and the anvil achieve the best clamping effect on the tissue. The firing drive assembly 7 is started to complete the firing of the staples to achieve the anastomosis of the tissue. The locking reset assembly 4 is manually pulled to drive the locking assembly 3 to release the lock on the opening and closing drive assembly 2, so that the staple cartridge assembly automatically resets and opens to facilitate the removal of the anastomosed tissue. At this time, the linear drive mechanism 6 limits and locks the locking reset assembly 4, so that the locking reset assembly 4 cannot continue to drive the opening and closing drive assembly 2 to move through the locking assembly 3, and the opened staple cartridge assembly cannot be closed again, preventing the used stapler from being reused.

[0044] Further, please refer to Figure 1 、 Figure 3 , the locking reset assembly 4 includes a carrier plate 41, a manual reset key 42, and a push plate 43. The manual reset key 42 and the push plate 43 are respectively fixedly installed on the upper and lower sides of the carrier plate 41. Thus, when the staple cartridge assembly is in the closed state, pulling the manual reset key 42 drives the carrier plate 41 to move, which can drive the locking assembly 3 to unlock the opening and closing drive assembly 2. After releasing the manual reset key 42, the locking assembly 3 can drive the locking reset assembly 4 to automatically reset.

[0045] A pressure sensing mechanism 431 is arranged on one side of the push plate 43. The pressure sensing mechanism 431 starts and stops synchronously with the firing drive assembly 7. When the manual reset key 42 is pulled to the position where the opening and closing drive assembly 2 is just unlocked, the sensing end of the pressure sensing mechanism 431 contacts the moving end of the linear drive mechanism 6. When the pressure sensing mechanism 431 detects pressure on its surface, it can start the linear drive mechanism 6. Thus, when the firing drive assembly 7 is not started, the pressure sensing mechanism 431 is not turned on, and the linear drive mechanism 6 remains stationary, which will not hinder the movement of the push plate 43. The locking reset assembly 4 can move reciprocally normally, and further the locking assembly 3 can move reciprocally freely, so that the unlocked opening and closing drive assembly 2 can continue to repeatedly drive the staple cartridge assembly to close and open.

[0046] When the firing drive assembly 7 is activated, the pressure sensing mechanism 431 is synchronously turned on. Thus, after unlocking the opening and closing drive assembly 2 by manually pulling the manual reset key 42, when the pressure sensing mechanism 431 comes into contact with the moving end of the linear drive mechanism 6, a certain pressure can be detected on the surface of the pressure sensing mechanism 431, enabling the linear drive mechanism 6 to be turned on. The moving end of the linear drive mechanism 6 automatically extends and maintains a certain extended length. By keeping the moving end of the linear drive mechanism 6 in abutment with the push plate 43, the position of the push plate 43 is locked, the locking and reset assembly 4 is locked, and further, both the locking assembly 3 and the opening and closing drive assembly 2 are locked, making it impossible for the opened staple cartridge assembly to be closed again.

[0047] Specifically, the linear drive mechanism 6 is preferably an electric push rod and can also be a cylinder; the pressure sensing mechanism 431 is preferably a pressure sensor.

[0048] Further, please refer to Figure 1 、 Figure 4 The opening and closing drive assembly 2 includes a drive rod 21, a connecting frame 22, and a connecting plate 23 that are fixedly connected in sequence. A fixed handle 11 and a movable handle 12 that can rotate relative to the fixed handle 11 are provided on the stapler body 1. By pulling the movable handle 12, the drive rod 21 can be driven to move to close the staple cartridge assembly. A reset elastic member 5 is connected between the end of the connecting plate 23 and the inner wall of the stapler body 1. Thus, when the staple cartridge assembly is opened, that is, when the movable handle 12 is not pulled, the reset elastic member 5 is in a natural elongation state. When the staple cartridge assembly is closed, that is, when the movable handle 12 is pulled close to the fixed handle 11, the reset elastic member 5 is in a stretched state. Further, after the opening and closing drive assembly 2 is unlocked, the opening and closing drive assembly 2 can automatically reset under the elastic action of the reset elastic member 5 and drive the movable handle 12 to reset.

[0049] Specifically, the reset elastic member 5 is preferably a spring; first sliders are respectively provided on both sides of the drive rod 21 and the connecting plate 23, and first guide grooves are formed on the inner wall surfaces of both sides of the stapler body 1. The first sliders are respectively slidably assembled inside the first guide grooves.

[0050] Further, please refer to Figure 1 、 Figure 4 、 Figure 5 The locking assembly 3 includes a sector-shaped locking member 31, a rotating shaft 32, a fixed support plate 33, and a torsion spring 34. The two ends of the rotating shaft 32 and the fixed support plate 33 are respectively fixedly assembled on the inner wall of the stapler body 1. The sector-shaped locking member 31 is rotatably assembled on the rotating shaft 32, and the torsion spring 34 is arranged between the sector-shaped locking member 31 and the fixed support plate 33;

[0051] A special-shaped limiting block 24 is fixedly connected to the upper surface of the connecting plate 23. Under the elastic force of the torsion spring 34, when the staple cartridge assembly is in the fully open state and the fully closed state, the sector locking member 31 can be in contact with the upper surface of the connecting plate 23 and the special-shaped limiting block 24. Therefore, during the process of the opening and closing driving assembly 2 moving to drive the staple cartridge assembly to convert from the fully open state to the fully closed state, as the special-shaped limiting block 24 moves, the sector locking member 31 in contact with the special-shaped limiting block 24 rotates, and the torsion spring 34 twists. When the staple cartridge assembly is in the fully closed state, the special-shaped limiting block 24 moves to the end of the sector locking member 31. The sector locking member 31 reversely resets under the elastic force of the torsion spring 34, and the end of the sector locking member 31 limits and locks the special-shaped limiting block 24, making the special-shaped limiting block 24 unable to automatically reset. Furthermore, the staple cartridge assembly can maintain the closed state.

[0052] Further, please refer to Figure 5 、 Figure 6 The sector locking member 31 includes a first support plate 311, a second support plate 312, and an arc plate 313. The arc plate 313 is fixedly installed between the first support plate 311 and the second support plate 312. An assembly through hole is opened at the junction of the first support plate 311 and the second support plate 312, and the rotating shaft 32 is rotationally matched with the assembly through hole;

[0053] A through groove 3121 is opened on the surface of the second support plate 312. The width of the through groove 3121 is greater than the width of the fixed support plate 33. Thus, when the sector locking member 31 rotates, the fixed support plate 33 can pass through the through groove 3121. Furthermore, the fixed support plate 33 does not hinder the normal rotation of the sector locking member 31. First installation grooves 3111 and second installation grooves 331 are respectively opened on the surfaces of the first support plate 311 and the fixed support plate 33 that are close to each other. The torsion spring 34 is sleeved on the rotating shaft 32, and the two torsion arms of the torsion spring 34 are respectively assembled inside the first installation groove 3111 and the second installation groove 331.

[0054] Further, please refer to Figure 4 、 Figure 7 、 Figure 8 A locking contact surface 242 is arranged on one side of the special-shaped limiting block 24. The locking contact surface 242 matches the surface contour of the arc plate 313. A driving contact surface 241 is arranged at the junction of the other side of the special-shaped limiting block 24 and the upper surface of the special-shaped limiting block 24;

[0055] When the staple cartridge assembly is fully opened, the driving contact surface 241 remains in contact with the lower surface of the first support plate 311. Thus, during the process of the opening and closing driving assembly 2 moving to drive the staple cartridge assembly to convert from the fully opened state to the fully closed state, as the special-shaped limiting block 24 moves, the sector locking member 31 can rotate under the push of the driving contact surface 241, and the torsion spring 34 is twisted. When the staple cartridge assembly is fully closed, the special-shaped limiting block 24 moves to the end of the sector locking member 31, the driving contact surface 241 no longer contacts the lower surface of the first support plate 311, and the sector locking member 31 reversely resets under the elastic force of the torsion spring 34, so that the locking contact surface 242 is attached to the surface of the arc-shaped plate 313. At this time, the special-shaped limiting block 24 can be limited and locked by the sector locking member 31, so that the special-shaped limiting block 24 cannot automatically reset, and further the staple cartridge assembly can maintain the closed state.

[0056] Further, please refer to Figures 5 - 8 , an arc-shaped first rack 3131 is arranged on the surface of the arc-shaped plate 313 in an arc-shaped step-by-step manner, a linear second rack 411 is arranged on the lower surface of the bearing plate 41, the second rack 411 and the first rack 3131 are meshed with each other, a second guide groove is formed on the surface of the stapler main body 1, second sliders are respectively arranged on both sides of the bearing plate 41, and the second sliders are respectively slidably assembled inside the second guide groove. Thus, under the meshing and driving action of the second rack 411 and the first rack 3131, when the bearing plate 41 slides, it can synchronously drive the sector locking member 31 to rotate. Further, pulling the manual reset key 42 to drive the bearing plate 41 to move can drive the sector locking member 31 to rotate to unlock the special-shaped limiting block 24. After the opening and closing driving assembly 2 automatically resets and the manual reset key 42 is released, the sector locking member 31 can reversely reset under the elastic force of the torsion spring 34 and drive the bearing plate 41 to reset, so that the entire locking and resetting assembly 4 is reset, facilitating the subsequent resetting and opening of the closed staple cartridge assembly again.

[0057] Further, please refer to Figure 1 、 Figure 4 、 Figure 7 , the movable handle 12 includes an operating end 121, a triggering end 122 and a fixed shaft 123. Both ends of the fixed shaft 123 are respectively fixedly assembled on the inner wall of the stapler main body 1, and the operating end 121 and the triggering end 122 can rotate around the fixed shaft 123. A contact block 221 is arranged at one end of the connecting frame 22, and the triggering end 122 and the contact block 221 can remain in contact under the elastic action of the reset elastic member 5.

[0058] Further, please refer to Figure 7, the firing drive assembly 7 includes a drive motor 71, a drive shaft 72, a threaded rod 73, and bevel gears 74. The two ends of the drive shaft 72 and the threaded rod 73 are respectively rotatably assembled inside the stapler body 1. The drive motor 71 is used to directly drive the drive shaft 72 to rotate. Bevel gears 74 that mesh with each other are fixedly sleeved on the drive shaft 72 and the threaded rod 73 respectively. A firing rod is assembled on the threaded rod 73 by threads. The firing rod is used to directly fire the staples. Thus, the drive motor 71 can directly drive the drive shaft 72 to rotate. Under the meshing transmission of the two bevel gears 74, the threaded rod 73 is driven to rotate, and further, the firing rod can generate displacement to fire the staples.

[0059] Further, please refer to Figure 1 , Figure 3 , Figure 7 , a battery pack 13 is arranged on the stapler body 1. The battery pack 13 can supply electrical energy to the drive motor 71, the pressure sensing mechanism 431, and the linear drive mechanism 6.

[0060] Working principle: When the present invention is in use, the tissue to be anastomosed is placed between the staple cartridge assembly and the anvil. Pull the movable handle 12 to drive the opening and closing drive assembly 2 to move. The staple cartridge assembly is driven to close by the movement of the drive rod 21, so that the tissue to be anastomosed is stably clamped between the staple cartridge assembly and the anvil. During the process of the staple cartridge assembly being driven from the fully open state to the fully closed state, as the special-shaped limiting block 24 moves, the sector locking member 31 can rotate under the push of the drive contact surface 241, and the torsion spring 34 is twisted. When the staple cartridge assembly is fully closed, the special-shaped limiting block 24 moves to the end of the sector locking member 31. The sector locking member 31 reversely resets under the elastic force of the torsion spring 34, so that the locking contact surface 242 is attached to the surface of the arc plate 313. At this time, the special-shaped limiting block 24 can be limited and locked by the sector locking member 31, and the entire opening and closing drive assembly 2 is limited and locked;

[0061] If the position of the clamped part of the tissue to be anastomosed is offset and the tissue needs to be clamped again, pull the manual reset key 42 to drive the carrier plate 41 to move. Under the meshing transmission of the second rack 411 and the first rack 3131, when the carrier plate 41 slides, it can synchronously drive the sector locking member 31 to rotate to unlock the special-shaped limiting block 24, so that the opening and closing drive assembly 2 can automatically reset under the elastic action of the reset elastic member 5 and drive the movable handle 12 to reset. At this time, the staple cartridge assembly resets and opens. After adjusting the position of the tissue, pull the movable handle 12 again to close the staple cartridge assembly. Medical staff can repeatedly drive the staple cartridge assembly to open and close until the staple cartridge assembly and the anvil achieve the best clamping effect on the tissue;

[0062] The driving motor 71 is started, and at the same time, the pressure sensing mechanism 431 is started. The firing rod is driven by the driving motor 71 to move to fire the staples. After the tissue is sutured, the manual reset key 42 is pulled to reset and open the cartridge assembly. When the manual reset key 42 is pulled to the position where the special-shaped limiting block 24 is just unlocked, the sensing end of the pressure sensing mechanism 431 contacts the movable end of the linear driving mechanism 6. A certain pressure is detected on the surface of the pressure sensing mechanism 431, thereby triggering the linear driving mechanism 6, causing the movable end of the linear driving mechanism 6 to automatically extend and maintain a certain extended length. By keeping the movable end of the linear driving mechanism 6 in contact with the push plate 43, the position of the push plate 43 is locked, and thus the position of the sector locking member 31 is locked, and the opening and closing driving assembly 2 cannot move further, preventing the opened cartridge assembly from closing again and preventing the used stapler from being reused.

[0063] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric stapler for preventing reuse, comprising a stapler body (1), wherein an opening and closing drive assembly (2), a locking assembly (3), a locking reset assembly (4), a linear drive mechanism (6), and a firing drive assembly (7) are arranged inside the stapler body (1), and it is characterized in that: The opening and closing driving assembly (2) is used to adjust the opening and closing state of the staple cartridge assembly. When the opening and closing driving assembly (2) moves to a position where the staple cartridge assembly is closed, it can be limited and locked by the locking assembly (3). By pulling the locking and resetting assembly (4), the locking assembly (3) can be driven to release the locking of the opening and closing driving assembly (2), so that the staple cartridge assembly automatically resets and opens; The firing driving assembly (7) is used to fire the anastomosis staples. When the firing driving assembly (7) is not activated, the locking and resetting assembly (4) can move freely back and forth, so that the opened and closed driving assembly (2) can continue to drive the staple cartridge assembly to open and close; When the firing driving assembly (7) is activated, after the locking and resetting assembly (4) unlocks the opening and closing driving assembly (2), it can be limited and locked by the linear driving mechanism (6), so that the opening and closing driving assembly (2) cannot continue to drive the staple cartridge assembly to close; The locking and resetting assembly (4) includes a carrier plate (41), a manual reset key (42), and a push plate (43). The manual reset key (42) and the push plate (43) are respectively fixedly installed on the upper and lower sides of the carrier plate (41); A pressure sensing mechanism (431) is arranged on one side of the push plate (43). The pressure sensing mechanism (431) starts and stops synchronously with the firing driving assembly (7). When the manual reset key (42) is pulled to a position where the opening and closing driving assembly (2) is just unlocked, the sensing end of the pressure sensing mechanism (431) contacts the moving end of the linear driving mechanism (6). When the pressure sensing mechanism (431) detects pressure on its surface, it can start the linear driving mechanism (6); When the firing driving assembly (7) is activated and the opening and closing driving assembly (2) is unlocked, the moving end of the linear driving mechanism (6) can automatically extend and maintain the extended length, so that the position of the push plate (43) is locked.

2. The electric stapler for preventing secondary utilization according to claim 1, wherein: The opening and closing driving assembly (2) includes a driving rod (21), a connecting frame (22), and a connecting plate (23) that are fixedly connected in sequence. A fixed handle (11) and a movable handle (12) that can rotate relative to the fixed handle (11) are arranged on the stapler body (1). By pulling the movable handle (12), the driving rod (21) can be driven to move to close the staple cartridge assembly. A reset elastic member (5) is connected between the end of the connecting plate (23) and the inner wall of the stapler body (1).

3. The electric stapler for preventing secondary use according to claim 2, wherein: The locking assembly (3) includes a sector locking member (31), a rotating shaft (32), a fixed support plate (33), and a torsion spring (34). The two ends of the rotating shaft (32) and the fixed support plate (33) are respectively fixedly assembled on the inner wall of the stapler body (1). The sector locking member (31) is rotatably assembled on the rotating shaft (32). The torsion spring (34) is arranged between the sector locking member (31) and the fixed support plate (33); The upper surface of the connecting plate (23) is fixedly connected with a special-shaped limiting block (24). Under the elastic force of the torsion spring (34), when the staple cartridge assembly is in the fully open state and the fully closed state, the sector-shaped locking member (31) can be in contact with the upper surface of the connecting plate (23) and the special-shaped limiting block (24).

4. A disposable electric stapler according to claim 3, wherein: The sector-shaped locking member (31) includes a first support plate (311), a second support plate (312) and an arc-shaped plate (313). The arc-shaped plate (313) is fixedly installed between the first support plate (311) and the second support plate (312). An assembly through hole is formed at the junction of the first support plate (311) and the second support plate (312), and the rotating shaft (32) is rotationally matched with the assembly through hole; A through groove (3121) is formed on the surface of the second support plate (312). The width of the through groove (3121) is greater than the width of the fixed support plate (33). The torsion spring (34) is sleeved on the rotating shaft (32), and the two torsion arms of the torsion spring (34) are respectively in contact with the first support plate (311) and the fixed support plate (33).

5. The electric stapler for preventing reuse according to claim 4, wherein: A locking contact surface (242) is arranged on one side of the special-shaped limiting block (24). The locking contact surface (242) matches the surface contour of the arc-shaped plate (313). A driving contact surface (241) is arranged at the junction of the other side of the special-shaped limiting block (24) and the upper surface of the special-shaped limiting block (24); When the staple cartridge assembly is fully open, the driving contact surface (241) is in contact with the lower surface of the first support plate (311). When the staple cartridge assembly is fully closed, the locking contact surface (242) is in contact with the surface of the arc-shaped plate (313).

6. The electric stapler for preventing reuse according to claim 4, characterized in that: The surface of the arc-shaped plate (313) is provided with a first rack (3131) distributed in an arc shape. The lower surface of the bearing plate (41) is provided with a second rack (411) distributed in a straight line. The second rack (411) and the first rack (3131) are meshed with each other.

7. The electric stapler for preventing secondary utilization according to claim 2, wherein: The movable handle (12) includes an operating end (121), a triggering end (122) and a fixed shaft (123). The two ends of the fixed shaft (123) are respectively fixedly installed on the inner wall of the stapler main body (1). The operating end (121) and the triggering end (122) can rotate around the fixed shaft (123). One end of the connecting frame (22) is provided with a contact block (221). Under the elastic action of the reset elastic member (5), the triggering end (122) and the contact block (221) can keep in contact.

8. A disposable electric stapler according to claim 1, characterized in that: The firing drive assembly (7) includes a drive motor (71), a drive shaft (72), a threaded screw rod (73), and bevel gears (74). The two ends of the drive shaft (72) and the threaded screw rod (73) are respectively rotatably assembled inside the stapler body (1). The drive motor (71) is used to directly drive the drive shaft (72) to rotate. The bevel gears (74) that mesh with each other are respectively fixedly sleeved on the drive shaft (72) and the threaded screw rod (73). A firing rod is assembled on the threaded screw rod (73) through a thread, and the firing rod is used to directly fire the staples.

9. A disposable electric stapler according to claim 1, wherein: A battery pack (13) is provided on the stapler body (1), and the battery pack (13) is used to supply electrical energy to the stapler.

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