Electric anastomat

Abstract

The utility model relates to the field of medical instruments, and discloses an electric anastomat which comprises a disposable anastomosis percussion device and a reusable driving handle, the anastomosis percussion device comprises a first connector part arranged at the bottom, and a magnetic coupling driven device is arranged in the first connector part; the driving handle comprises a driving device arranged inside and a second interface part arranged at the top, and a magnetic coupling active device is arranged in the second interface part; in the using state, the first interface part and the second interface part are detachably assembled together, an air gap is formed between the magnetic coupling driven device and the magnetic coupling driving device, the driving device drives the magnetic coupling driving device to rotate, and the magnetic coupling driving device transmits rotation to the magnetic coupling driven device in a non-contact mode through magnetic coupling. And the magnetic coupling driven device drives the anastomosis firing device. According to the electric anastomat, vibration of an anastomotic stoma is reduced, the reusable driving handle is easy to disinfect, high-cost components can be reused, and cost is saved.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an electric stapler technology. Background Art

[0002] Laparoscopic staplers are one of the important instruments in surgical operations. They replace traditional manual suturing and use titanium nails to separate or staple tissues. They are easy and quick to operate, greatly shortening the operation time. Laparoscopic staplers make manual anastomosis in narrow surgical fields and deep areas easy, accurate, firm and reliable, significantly reducing the incidence of anastomotic leakage. According to the different power transmission methods, staplers can be divided into manual and electric types.

[0003] Unlike the mechanical control of traditional manual laparoscopic staplers, electric laparoscopic staplers use power sensing to cut tissue between two staples while firing the staplers. Electric laparoscopic staplers can drive three rows of staggered staplers on both sides and are equipped with a disposable battery pack. Since its birth, electric staplers have undergone many design improvements, from the original medical "stapler" to a modern stapler. It has gone through the technical stages of the first generation of open staplers and the second generation of laparoscopic staplers, and has now entered the era of the third generation of electric laparoscopic staplers. Compared with manual staplers, electric laparoscopic staplers have better hemostatic effects, so they have significantly improved their clinical and economic values.

[0004] However, the existing electric staplers are disposable medical consumables as a whole and are directly discarded after use. In order to improve the fluency of the operation, ensure the completion of the operation and reduce the discomfort of the patient in related parts during and after the operation, most electric staplers use precision servo motors as power sources, but the motor is expensive. After the operation, the entire electric stapler including the motor is discarded, which greatly increases the cost of the operation and also causes a waste of resources. Therefore, there is an urgent need for a new type of electric stapler that can achieve the reuse of key components while ensuring the effectiveness of the operation, so as to reduce the cost of the operation and reduce unnecessary waste. Summary of the invention

[0005] The purpose of this application is to provide an electric stapler to solve the problem of resource waste.

[0006] The present application discloses an electric stapler, characterized in that it comprises a disposable stapler firing device 20 and a reusable driving handle 40, wherein:

[0007] The anastomosis firing device 20 is used to perform a tissue anastomosis function, and includes a first interface portion 24 disposed at the bottom, and a magnetic coupling driven device 31 is disposed in the first interface portion 24;

[0008] The driving handle 40 includes a driving device disposed inside and a second interface portion 43 disposed on the top, wherein the second interface portion 43 is provided with a magnetic coupling active device 33;

[0009] When in use, the first interface portion 24 and the second interface portion 43 are detachably assembled together, forming an air gap 32 between the magnetic coupling driven device 31 and the magnetic coupling active device 33, and the driving device drives the magnetic coupling active device 33 to rotate, and the magnetic coupling active device 33 transmits the rotation to the magnetic coupling driven device 31 in a non-contact manner through magnetic coupling, and the magnetic coupling driven device 31 drives the anastomosis firing device 20.

[0010] In a preferred example, the driving device includes a mechanically coupled motor 41 and a reduction box 44 , and the reduction box 44 is mechanically coupled to the magnetic coupling active device 33 via a planetary gear 441 .

[0011] In a preferred example, the driving handle 40 also includes a rechargeable battery to power the motor 41 .

[0012] In a preferred example, the driving handle 40 also includes a wireless charging device for wirelessly and electromagnetically coupling with an external wireless charging power source, and using the electrical energy from the wireless charging power source to charge the rechargeable battery.

[0013] In a preferred embodiment, the anastomotic firing device 20 further includes a transmission chamber 23, an anastomotic opening 21 and a firing driving gear 26, wherein:

[0014] A mechanical transmission mechanism is provided in the transmission chamber 23 for converting the rotational power of the magnetic coupling driven device 31 into the surgical operation power required by the anastomotic stoma 21;

[0015] The anastomotic opening 21 is located at the front end of the anastomotic firing device 20 and is used to perform tissue separation or anastomosis operations;

[0016] The firing driving gear 26 is mechanically coupled to the magnetic coupling driven device 31 , and the rotational power is transmitted to the anastomotic opening 21 through the mechanical transmission mechanism in the transmission chamber 23 to realize the surgical operation.

[0017] In a preferred example, the reduction box 44 further includes a planetary gear 441 disposed inside the reduction box 44 , and the planetary gear 441 is mechanically coupled to the magnetic coupling active device 33 to achieve torque transmission.

[0018] In a preferred example, the magnetic coupling driven device 31 and the magnetic coupling active device 33 respectively include a plurality of permanent magnets, and the plurality of permanent magnets are arranged in a pattern of alternating N poles and S poles.

[0019] In a preferred example, the magnetic coupling driven device 31 and the magnetic coupling active device 33 each include a disk, each disk is arranged with a plurality of permanent magnets with alternating N poles and S poles, and the air gap 32 is between the two disks.

[0020] In a preferred embodiment, the magnetic coupling active device 33 comprises a hollow sleeve, and a plurality of permanent magnets with alternating N poles and S poles are arranged on the inner wall of the sleeve; the magnetic coupling passive device 31 comprises a cylinder, and a plurality of permanent magnets with alternating N poles and S poles are arranged on the outer wall of the cylinder;

[0021] When the first interface portion 24 and the second interface portion 43 are detachably assembled together, the cylinder extends into the sleeve, and the air gap 32 is between the outer wall of the cylinder and the inner wall of the sleeve.

[0022] In a preferred example, the driving handle 40 has a sealed and waterproof housing.

[0023] The embodiments of the present application have the following technical differences and technical effects.

[0024] First, it enables the reuse of high-value components such as precision motors in staplers. After the operation is completed, the disposable stapler firing device can be discarded, while the drive handle containing the precision motor can be retained for the next operation. This design greatly reduces surgical costs and reduces resource waste.

[0025] Furthermore, the driving handle is enclosed in a sealed and waterproof casing. The interface between the driving handle and the anastomotic firing device can be designed to have a smooth surface due to the use of magnetic coupling, without any detailed physical structure that is prone to harboring dirt and grime. This allows the driving handle to be conveniently disinfected after use by soaking it in a disinfectant liquid, thereby ensuring that it can be thoroughly disinfected.

[0026] Furthermore, the magnetic coupling connection is adopted, so that the disposable anastomosis firing device and the driving handle can be easily separated and connected, which is convenient for replacing and cleaning the disposable anastomosis firing device. At the same time, the existence of the air gap physically isolates the two, which helps to prevent cross infection and improve the safety of the device.

[0027] Furthermore, the non-contact power transmission method of magnetic coupling reduces mechanical wear and vibration of the anastomotic firing device, thereby improving the reliability and durability of the device. The anastomotic firing device can be safely removed and replaced after use without affecting the reusability of the drive handle.

[0028] Furthermore, the magnetic coupling design simplifies the connection and removal process of the device, making it easier for medical personnel to replace and maintain the device.

[0029] In summary, the electric stapler of the present invention reduces surgical costs and waste while taking into account functionality, safety, reliability and ergonomics, and improves surgical efficiency and quality. It is a surgical instrument invention with great application prospects.

[0030] A large number of technical features are recorded in the specification of this application, which are distributed in various technical solutions. If all possible combinations of technical features of this application (i.e., technical solutions) are to be listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of this application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all deemed to have been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be deemed to have been recorded because it is technically infeasible, and the solution of A+B+C+E should be deemed to have been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of an electric stapler according to a first embodiment of the present application;

[0032] Figure 2 It is a structural schematic diagram of a disposable anastomosis firing device of an electric stapler according to the first embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram of a magnetic coupling connection portion of an electric stapler according to a first embodiment of the present application;

[0034] Figure 4 It is a schematic structural diagram of a driving handle of an electric stapler according to the first embodiment of the present application;

[0035] Figure 5 A schematic diagram of the interface structure of the stapler firing device and the driving handle of the electric stapler according to the first embodiment of the present application;

[0036] Figure 6 It is a schematic diagram of the axial magnetic coupling transmission principle in the electric stapler according to the first embodiment of the present application;

[0037] Figure 7 It is a schematic diagram of the radial magnetic coupling transmission principle in the electric stapler according to the first embodiment of the present application.

[0038] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0039] 10: Electric stapler

[0040] 20: Anastomosis firing device

[0041] 21: Anastomosis

[0042] 22: Firing wrench

[0043] 23: Transmission chamber

[0044] 24: First interface

[0045] 26: Firing driving gear

[0046] 30: Magnetic coupling connection device

[0047] 31: Magnetic coupling driven device

[0048] 32: Air Gap

[0049] 33: Magnetic coupling active device

[0050] 40: Driving handle

[0051] 41: Precision Motor

[0052] 42: Ergonomic handle housing

[0053] 43: Second interface

[0054] 44: Reducer

[0055] 441: Planetary gear

[0056] 71: Outer rotor

[0057] 72: Inner rotor

[0058] 73: Driving shaft

[0059] 74: Driven shaft DETAILED DESCRIPTION

[0060] In the following description, many technical details are provided to help readers better understand the present application. However, those skilled in the art can understand that the technical solution claimed in the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0061] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings. The "top", "bottom" and "front" mentioned in the present application are relative positions based on the directions in the accompanying drawings or general use.

[0062] The first embodiment of the present application relates to an electric stapler, the structure of which is as follows: Figure 1 As shown, it includes: a disposable anastomosis firing device 20 and a driving handle 40.

[0063] The anastomosis firing device 20 is an executive component for tissue anastomosis. Figure 2 As shown, in one embodiment, the anastomosis firing device 20 includes an anastomosis opening 21, a firing wrench 22, a transmission chamber 23, a first interface portion 24, and a magnetic coupling driven device 31. Specifically, the anastomosis firing device 20 is the part of the electric stapler that is used to directly contact and operate tissues. Since it contacts the patient's body fluids and tissues, in order to avoid cross infection, it is usually designed as a disposable structure. It mainly includes the following parts:

[0064] The anastomotic opening 21 is located at the front end of the anastomotic firing device 20 and is a key component that directly contacts the tissue and performs the separation or anastomosis operation. Optionally, the anastomotic opening 21 is composed of a titanium staple cartridge, a cutting knife, an anvil and other structures, and is used to achieve the functions of cutting, stapling and anastomosis of the tissue.

[0065] Firing wrench 22: The firing wrench 22 is mechanically connected to the anastomotic stoma 31 and is used to control the opening and closing, cutting, stapling and other actions of the anastomotic stoma 21. By operating the firing wrench 22, the doctor can adjust the position and state of the anastomotic stoma 21 and trigger cutting and stapling at an appropriate time.

[0066] Transmission chamber 23: located in the middle of the anastomotic firing device 20, used to transmit power to the anastomotic opening 21. The transmission chamber 23 usually contains transmission mechanisms such as gears and shafts, which convert the rotational motion into the opening, closing, cutting and other actions of the anastomotic opening 21. Specifically, a mechanical transmission mechanism is arranged inside the transmission chamber 23. The function of the mechanical transmission mechanism is to convert and transmit the rotational motion received from the magnetic coupling driven device 31 to the anastomotic opening 21, thereby driving the opening and closing of the anastomotic opening 21, and completing the cutting and anastomosis of the tissue. The mechanical transmission mechanism may include one or more combinations of common mechanical transmission modes such as gear transmission, chain transmission, and belt transmission. For example, the mechanical transmission mechanism may include a series of gears, one of which is connected to the output shaft of the magnetic coupling driven device 31, and the motion and torque are transmitted through the meshing between the gears, and finally the gear connected to the anastomotic opening 21 is driven to rotate, thereby realizing the opening and closing, cutting and anastomosis of the anastomotic opening 21. The mechanical transmission mechanism may adopt other forms of mechanical transmission, such as a combination of a sprocket and a chain, or a combination of a pulley and a synchronous belt.

[0067] Optional, such as Figure 5 As shown, the mechanical transmission mechanism includes a firing driving gear 26, which is arranged in the anastomotic firing device 20, and is mechanically coupled with the magnetic coupling driven device 31 (for example, the firing driving gear 26 and the magnetic coupling driven device 31 can be assembled on the same shaft). Therefore, when the magnetic coupling driven device 31 is driven by the magnetic coupling active device 33, the power is transmitted to the mechanical transmission mechanism through the firing driving gear 26. The power transmission can be achieved by gear meshing or coaxial means. The mechanical transmission mechanism itself is a prior art and will not be described in detail here.

[0068] The first interface portion 24 is located at the bottom of the anastomosis firing device 20 and is used to be detachably mounted to the second interface portion 43 of the driving handle 40 .

[0069] Magnetic coupling driven device 31: mechanically coupled to the mechanical transmission mechanism. Optionally, the magnetic coupling driven device 31 is usually composed of a permanent magnet, and its magnetic pole direction matches the magnetic coupling active device 33 to achieve magnetic field coupling.

[0070] In summary, the anastomosis firing device 20 is a key component in the electric stapler that directly performs surgical operations. Its structural design and material selection need to take into account functionality, safety and economy, and must meet the needs of surgical operations while also being disposable.

[0071] That is to say, the anastomosis firing device 20 is designed for single use. It is used to cut or connect (anastomose) tissues in the body during surgery. The device includes the following main parts, each of which has a specific function. Among them, the anastomosis 21 is a part of the anastomosis firing device 20, which is in direct contact with the tissues in the body. It is responsible for fixing the tissue in a proper position for cutting or anastomosis. During the operation, the anastomosis 21 presses the titanium nail into the tissue to achieve anastomosis, ensuring the precise docking and fixation of the tissue. The firing wrench 22 is the mechanical part that operates the anastomosis firing device 20, and the doctor activates the device by operating the firing wrench 22. When the firing wrench 22 is pressed, it triggers the internal mechanical mechanism, prompting the anastomosis 21 to cut or connect the tissue. The transmission chamber 23 is partially located inside the anastomosis firing device 20, which is a space or channel for transmitting power. During the operation, when the firing wrench 22 is activated, the transmission chamber 23 converts the power from the drive handle 40 into the action required by the anastomosis 21.

[0072] The implementation method of the anastomosis firing device 20 and the execution part of the electric stapler in the prior art can be the same. The electric stapler in the prior art is integrated and works by being driven by a motor and a reduction box. After removing the motor and the reduction box from the electric stapler in the prior art, the part used to perform the tissue anastomosis function and driven by the motor and the reduction box can be regarded as the anastomosis firing device 20 in this application (except for the magnetic coupling driven device 31 and the first interface part 24). Because the implementation methods of the anastomosis firing device 20 can be various, and the main part of the anastomosis firing device 20 itself is not an innovation of this application, it is not discussed in particular detail here. Those skilled in the art can fully understand how to implement the anastomosis firing device 20 by reading the prior art of electric staplers (such as U.S. Patent US20090090763A1, Chinese Patent CN102247182A, etc.).

[0073] like Figure 4 As shown, the driving handle 40 may include a precision motor 41, an ergonomic handle housing 42, a second interface portion 43, a reduction gearbox 44, a magnetic coupling active device 33 and a battery.

[0074] The rotor of the precision motor 41 is mechanically coupled to the reduction box 44. The reduction box 44 is mechanically coupled to the magnetic coupling active device 33. Optionally, the reduction box 44 is coupled to the magnetic coupling active device 33 through a planetary gear 441. For example, when the precision motor 41 rotates, its rotor transmits power to the reduction box 44, and the reduction box 44 further transmits power to the magnetic coupling active device 33.

[0075] Specifically, the driving handle 40 is the part of the electric stapler for the doctor to hold and operate. Its main function is to provide driving force and transmit it to the stapler firing device 20, while meeting the ergonomic design requirements to ensure that the doctor can operate the device comfortably and accurately.

[0076] Precision motor 41: Located inside the driving handle 40, it is the core component that provides driving force. Precision motor 41 is usually a motor with small size, large output torque and high control accuracy, such as a brushless DC motor or a stepper motor, to meet the power demand and control requirements of the electric stapler.

[0077] Ergonomic handle housing 42: It is the external structure of the driving handle 40, which is in direct contact with the doctor's palm and fingers. The design of the ergonomic handle housing 42 needs to take into account ergonomic principles, such as grip comfort, ease of operation and anti-slip properties. The housing material is usually made of lightweight, durable, insulating engineering plastics, and the surface is frosted or wrapped with flexible materials to improve the grip and anti-slip properties. Optionally, the housing is sealed and waterproof, and can be made of polystyrene, polycarbonate, polyamide, polytetrafluoroethylene and other materials, so that the driving handle 40 can be conveniently disinfected by immersing it in a disinfectant liquid, so that it is easy to reuse.

[0078] The second interface portion 43 is located at the top of the driving handle 40 and is used to be detachably mounted to the first interface portion 24. The first interface portion 24 and the second interface portion 43 can be detachably assembled in various ways. For example, the first interface portion 24 and the second interface portion 43 can both be cylindrical in shape, the bottom inner surface of the first interface portion 24 is provided with an internal thread, and the top outer surface of the second interface portion 43 is provided with an external thread, and the diameters of the two are matched, so that the driving handle 40 can be assembled to the first interface portion 24 on the matching firing device 20 through the second interface portion 43 in a rotatable manner. For another example, the cross-sections of the first interface portion 24 and the second interface portion 43 can be rectangular, and the second interface portion 43 can be inserted into the first interface portion 24, and the relative position of the first interface portion 24 and the second interface portion 43 can be locked after insertion by using an elastic bayonet, which can be similar to the interface between the magazine and the gun body of a firearm.

[0079] Optionally, the magnetic coupling active device 33 is disposed in the second interface portion 43. The magnetic coupling active device 33 may be formed of a permanent magnet, and its magnetic pole direction matches the magnetic coupling driven device 31. When the precision motor 41 is running, the magnetic coupling active device 33 rotates with the rotor, and drives the magnetic coupling driven device 31 to rotate through the magnetic field force, thereby driving the transmission chamber 23 and the anastomotic opening 21 of the anastomotic firing device 20 to move.

[0080] Further, such as Figure 3 As shown, the air gap 32 is located between the magnetic coupling driven device 31 and the magnetic coupling active device 33, and is a physical gap. The existence of the air gap 32 makes the magnetic coupling driven device 31 and the magnetic coupling active device 33 not in direct physical contact, but can still achieve power transmission through the magnetic field force. The size of the air gap 32 needs to be reasonably designed according to the requirements of the magnetic field strength and the transmission torque.

[0081] The magnetic coupling driven device 31, the air gap 32 and the magnetic coupling active device 33 constitute a magnetic coupling connection device 30. It should be noted that the magnetic coupling connection device 30 uses the magnetic field force between permanent magnets to achieve non-contact power transmission. This design has the following advantages:

[0082] Detachability: The magnetic coupling connection allows the anastomosis firing device 20 and the driving handle 40 to be easily separated and connected, making it easy to replace and clean the anastomosis firing device 20.

[0083] Isolation: The presence of the air gap 32 physically isolates the anastomosis firing device 20 from the driving handle 40, which helps prevent cross infection and improve the safety of the device.

[0084] In summary, the magnetic coupling connection device 30 is a key component for realizing power transmission and detachable connection in the electric stapler. Its structural design is ingenious, and it uses magnetic field force to realize non-contact transmission, thereby improving the reliability, safety and flexibility of the equipment.

[0085] In other words, the magnetic coupling connection device 30 uses permanent magnets to establish a magnetic coupling system, which is responsible for connecting the anastomosis firing device 20 and the driving handle 40. Among them, the magnetic coupling driven device 31 is installed on the anastomosis firing device 20. It responds to the magnetic force signal sent by the driving handle 40 through the magnetic coupling active device 33, allowing power to be transmitted from the driving handle to the anastomosis firing device. The air gap 32 is located between the magnetic coupling driven device 31 and the magnetic coupling active device 33, which is a non-material connection area between the two. The air gap ensures that the magnetic force can be transmitted across space, while allowing a certain physical distance to be maintained between the two magnetic coupling components to avoid direct contact. The magnetic coupling active device 33 is installed on the driving handle 40 to generate a magnetic field to drive the magnetic coupling driven device 31. By rotating or moving, the active device 33 creates a changing magnetic field in the air gap 32, and these magnetic field changes are transmitted to the driven device 31 through the air gap, prompting it to move or rotate accordingly.

[0086] Furthermore, through this design, the magnetic coupling connection device 30 allows power to be transmitted during surgery without direct physical connection, thereby reducing mechanical wear and improving the reliability and durability of the device. At the same time, this non-contact power transmission method allows the anastomosis firing device 20 to be safely removed and replaced after use without affecting the reusability of the drive handle 40.

[0087] Optionally, in one embodiment, the driving handle 40 may include a rechargeable battery, such as a lithium-ion battery, a solid-state battery, etc., to power the motor 41.

[0088] Optionally, in one embodiment, the driving handle 40 further includes a wireless charging device for wirelessly and electromagnetically coupling with an external wireless charging power source, and using the electrical energy from the wireless charging power source to charge the rechargeable battery in the driving handle 40 .

[0089] The working principle of the driving handle 40 is as follows: when the doctor pulls the trigger wrench 22, the precision motor 41 starts to run, and the torque of the precision motor 41 is transmitted to the second interface part 43 through the reducer box 44. The second interface part 43 is fixedly connected to the magnetic coupling active device 33, and the magnetic coupling active device 33 transmits the rotation to the magnetic coupling driven device 31 through magnetic coupling. The magnetic coupling driven device 31 is fixedly connected to the first interface part 24, and the rotation is then converted into the movement of the anastomotic opening 21 through the transmission chamber 23 to complete the surgical operation. After the operation is completed, the anastomotic firing device 20 is discarded, and a new anastomotic firing device 20 is used to connect to the driving handle 40 during the next operation.

[0090] The driving handle 40 is mainly used to operate and control the functions of the electric stapler. Among them, the precision motor 41 is installed inside the driving handle 40 and is the power source of the driving handle. The rotor of the precision motor 41 is designed to provide stable and accurate rotational power, which is crucial for the accuracy and effect of the surgical operation. The ergonomic handle housing 42 is the external part of the driving handle 40, and the design takes into account the doctor's grip comfort and operation convenience during the operation. The ergonomic design helps to reduce fatigue during the operation and improve surgical accuracy.

[0091] Optionally, the driving handle 40 is provided with a button or knob for controlling the start, stop and speed regulation of the precision motor 41.

[0092] Furthermore, after the operation is completed, the used anastomosis firing device 20 can be replaced to prepare for the next operation.

[0093] Specifically, an important feature of the electric stapler is that the drive handle 40 can be reused, while the stapler firing device 20 is designed as a disposable, disposable component. This design helps to reduce costs, improve the efficiency of the use of the equipment, and reduce the risk of cross infection.

[0094] After the operation is completed, the doctor can replace the anastomosis firing device 20 according to the following steps:

[0095] First, turn off the power of the driving handle 40 to ensure that the precision motor 41 stops running.

[0096] Then, the anastomosis firing device 20 is separated from the driving handle 40 and properly disposed of in accordance with medical waste treatment regulations.

[0097] Take out a new anastomosis firing device 20 , align it with the driving handle 40 , and securely connect the two via the locking mechanism or buckle of the interfaces 24 and 43 .

[0098] After replacing the anastomosis firing device 20, the electric stapler can be used for the next operation. This replaceable design not only saves costs, but also improves the efficiency of the equipment and reduces the time for instrument preparation and cleaning and disinfection. At the same time, since the anastomosis firing device 20 and the driving handle 40 are connected by magnetic coupling, the replacement process is simple and fast, and no tools are required, which reduces the interval between operations and the risk of infection.

[0099] It can be seen that the anastomosis firing device 20 is a disposable sterile instrument. After completing a surgical operation, it can be removed from the driving handle 40 and discarded; then a new sterile anastomosis firing device 20 is installed on the driving handle 40, and the entire electric stapler can be used for the next operation; and the driving handle 40 is reusable.

[0100] In summary, the replacement design of the anastomosis firing device 20 is a highlight of the electric stapler, which fully considers factors such as economy, efficiency and sensory control, and provides convenience for clinical application. Doctors only need to replace the anastomosis firing device 20 after each operation, and can reuse the driving handle 40, thereby achieving the purpose of saving costs and improving efficiency, while also reducing the risk of cross infection and improving the quality of medical services.

[0101] Optionally, the magnetic coupling driven device 31 and the magnetic coupling active device 33 may be Figure 6 or Figure 7 Magnetic coupling is achieved in the manner shown.

[0102] like Figure 6 As shown, magnets are installed on two disks of the same diameter in a manner of crossing the N and S poles. When in use, the two disks are respectively attached to the magnetic coupling active device 33 and the magnetic coupling passive device 31, with a certain air gap in between. Since the N pole of one magnet attracts the S pole of the other magnet opposite, and repels the N poles on both sides of the magnet, it is ensured that within a certain torque range, the magnetic coupling active device 33 and the magnetic coupling passive device 31 keep rotating synchronously.

[0103] Since medical equipment needs to be sterilized, in the embodiments of the present application, the electric stapler optionally considers some design and material optimizations, such as: smooth surface and seamless design: the surface of the device should be designed to be smooth and seamless for easy cleaning and disinfection. Grooves or gaps that accumulate bacteria and viruses should be avoided as much as possible; the shell and surface of the device are made of wear-resistant and corrosion-resistant materials so that they can remain in good condition after long-term use and multiple disinfections; the device material can withstand high temperatures and common disinfection chemicals, such as alcohol, hydrogen peroxide, and chlorhexidine. This ensures that the device will not be damaged during disinfection.

[0104] Optionally, since the electric stapler does not require high speed, the magnetic field can be customized according to the speed. By adjusting the strength or other parameters of the magnetic field, the magnetic coupling transmission can be adjusted to meet different speed requirements, ensuring that a stable magnetic coupling transmission effect can be achieved under various operating conditions.

[0105] Optionally, the permanent magnet of the magnetic coupler can be replaced with an electromagnet, and the transmission capacity can be changed by precisely controlling the magnetic field strength of the electromagnet.

[0106] Furthermore, in actual work, the true NS relative state only exists in the state of no torque output. As long as there is torque generated, the driven disk will have a certain phase angle with the active disk. This angular displacement is maintained and increased until the torque is large enough to make the N pole relative to the opposite N pole, and then the transmission "slips", the two turntables rotate and displace, and jump to the next pair of coupling states. Due to the above characteristics, although magnetic transmission can be synchronized, it cannot achieve precise synchronous transmission. This planar transmission has a simple structure and does not require high coaxiality of the two shafts during installation. Since the principle of plane attraction is adopted, the smaller the air gap, the greater the torque.

[0107] But at the same time, under the action of the magnetic field, the axial force (mutual attraction) also changes proportionally. The axial force is the main disadvantage of this planar actuator. In addition, since the transmitted torque is related to the disc area, the torque of this actuator cannot be too large, otherwise it will lead to excessive size and difficulty in installation. Simple structure and low cost are the main advantages of planar actuators. Therefore, it has been successfully applied in some micro-isolation transmissions. At present, the torque of commonly used simple structure planar actuators is generally below 10Nm.

[0108] Figure 7 It is another magnetic coupling method, including: an outer rotor 71 and an inner rotor 72. The outer rotor 71 is fixed to the driving shaft 73, and the inner rotor 72 is fixed to the driven shaft 74. Magnets are installed on the outer circumference of the inner rotor and the inner circumference of the outer rotor respectively. The magnets have an even number of poles and are arranged circumferentially in a NS cross manner. Automatic coupling is achieved by aligning the working surfaces of the magnets of the inner and outer rotors. There is a certain air gap between the inner and outer rotors to isolate the active and driven components. The size of the air gap is mostly between 2mm-8mm. The smaller the air gap, the higher the effective utilization of the magnet, and the more difficult the isolation; the larger the air gap, the more convenient the isolation, but the worse the effective utilization of the magnetic field of the magnet. The radius position of the air gap is the working radius of the transmission of this structure. Therefore, when designing, the torque of the required transmission can be obtained by adjusting the radius of the air gap. When the air gap remains unchanged, increasing the axial length of the coupling magnet (i.e., the coupling area) can also increase the torque approximately proportionally.

[0109] Figure 7The torque range of the coaxial magnetic transmission shown is generally between 3Nm-500Nm, and the larger one can reach 2000Nm. An isolation sleeve is installed between the inner and outer rotors to seal the inner rotor or the outer rotor. The torque can still be transmitted. This is the principle of sealing using magnetic transmission. The magnetic transmission structure transforms the dynamic seal into a static seal, which is also the biggest advantage of magnetic transmission.

[0110] Optionally, in one embodiment, the magnetic coupling active device 33 includes an outer rotor 71, and the magnetic coupling driven device 31 includes an inner rotor 72. The sealed and waterproof housing of the driving handle 40 seals the outer rotor 71 in the driving handle 40, and can transmit torque to the inner rotor 72 through magnetic coupling. In another embodiment, the outer rotor 71 can also be arranged in the magnetic coupling driven device 31, and the inner rotor 72 can be arranged in the magnetic coupling active device 33. The housing of the driving handle 40 seals the inner rotor 72 in the driving handle 40.

[0111] Magnetic transmission is a flexible non-contact transmission. During the transmission process, there is no direct contact between the input and output, but the torque is transmitted by the magnetic field. At present, synchronous magnetic transmission is mainly used in products such as magnetic pumps and magnetic stirring kettles to replace dynamic seals and achieve zero leakage in the true sense. In terms of non-sealed transmission, it can achieve effects such as isolating the vibration of the driving shaft and the driven shaft. In addition, through reasonable structural design, magnetic transmission can also achieve right-angle and cross transmission, and realize functions similar to helical gears and bevel gear transmission. While transmitting rotation, magnetic transmission can also achieve axial movement at the same time. This type of structure can be used in vacuum chambers and other fields. For example, outside the vacuum chamber, magnetic transmission is used to control the mechanical actions in the vacuum chamber.

[0112] The mechanical coupling mentioned in the various embodiments of the present application may be various, including but not limited to: gear coupling, shaft coupling, chain and belt drive, etc.

[0113] It should be noted that in the application documents of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements. In the application documents of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements. Expressions such as multiple, multiple, and multiple include 2, 2 times, 2 kinds, and more than 2, more than 2 times, and more than 2 kinds.

[0114] All documents mentioned in this application are considered to be included in the disclosure of this application as a whole, so that they can be used as the basis for modification when necessary. In addition, it should be understood that after reading the above disclosure of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. An electric stapler, characterized in that , comprising a disposable anastomosis firing device (20) and a reusable driving handle (40), wherein: The anastomosis firing device (20) is used to perform a tissue anastomosis function, and comprises a first interface portion (24) arranged at the bottom, wherein a magnetic coupling driven device (31) is arranged in the first interface portion (24); The driving handle (40) comprises a driving device arranged inside and a second interface portion (43) arranged at the top, wherein a magnetic coupling active device (33) is arranged in the second interface portion (43); In the use state, the first interface part (24) and the second interface part (43) are detachably assembled together, and an air gap (32) is formed between the magnetic coupling driven device (31) and the magnetic coupling active device (33). The driving device drives the magnetic coupling active device (33) to rotate, and the magnetic coupling active device (33) transmits the rotation to the magnetic coupling driven device (31) in a non-contact manner through magnetic coupling. The magnetic coupling driven device (31) drives the anastomosis firing device (20).

2. The electric stapler according to claim 1, characterized in that: The driving device comprises a mechanically coupled motor (41) and a reduction box (44), wherein the reduction box (44) is mechanically coupled to the magnetic coupling active device (33) via a planetary gear (441).

3. The electric stapler according to claim 2, characterized in that: The driving handle (40) further comprises a rechargeable battery for supplying power to the motor (41).

4. The electric stapler according to claim 3, characterized in that: The driving handle (40) also includes a wireless charging device, which is used for wirelessly and electromagnetically coupling with an external wireless charging power source, and using the electric energy from the wireless charging power source to charge the rechargeable battery.

5. The electric stapler according to claim 1, characterized in that: The anastomotic firing device (20) further comprises a transmission chamber (23), an anastomotic opening (21) and a firing driving gear (26), wherein: A mechanical transmission mechanism is provided in the transmission chamber (23) for converting the rotational power of the magnetic coupling driven device (31) into the surgical operation power required by the anastomotic opening (21); The anastomotic opening (21) is located at the front end of the anastomotic firing device (20) and is used to perform tissue severance or anastomosis operations; The firing driving gear (26) is mechanically coupled to the magnetic coupling driven device (31), and the rotational power is transmitted to the anastomotic opening (21) through the mechanical transmission mechanism in the transmission chamber (23), so as to realize the surgical operation.

6. The electric stapler according to claim 2, characterized in that: The reduction box (44) further comprises a planetary gear (441) disposed inside the reduction box (44), and the planetary gear (441) is mechanically coupled to the magnetic coupling active device (33) to achieve torque transmission.

7. The electric stapler according to claim 1, characterized in that: The magnetic coupling driven device (31) and the magnetic coupling active device (33) respectively include a plurality of permanent magnets, and the plurality of permanent magnets are arranged in a pattern of alternating N poles and S poles.

8. The electric stapler according to claim 7, characterized in that: The magnetic coupling driven device (31) and the magnetic coupling active device (33) each comprise a disk, each disk having a plurality of permanent magnets with alternating N poles and S poles arranged therein, and the air gap (32) is between the two disks.

9. The electric stapler according to claim 7, characterized in that: The magnetic coupling active device (33) comprises a hollow sleeve, the inner wall of which is arranged with a plurality of permanent magnets with alternating N poles and S poles; the magnetic coupling passive device (31) comprises a cylinder, the outer wall of which is arranged with a plurality of permanent magnets with alternating N poles and S poles; When the first interface portion (24) and the second interface portion (43) are detachably assembled together, the cylinder extends into the sleeve, and the air gap (32) is between the outer wall of the cylinder and the inner wall of the sleeve.

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