Handheld Assembly of Electric Surgical Instrument and Electric Surgical Instrument

Abstract

The present invention relates to a hand-held assembly of an electric surgical instrument and an electric surgical instrument. The hand-held assembly of the electric surgical instrument includes: a power supply assembly, a drive assembly, a switching assembly, a first power output assembly, a second power output assembly, a control circuit, and a housing portion; the switching assembly includes an output switching portion with a motor; the output switching portion can make the switching assembly in a first output mode or a second output mode. The hand-held assembly of the electric surgical instrument provided by the present invention realizes the swinging, closing, and firing of a staple cartridge assembly through a first motor. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. At the same time, the switching of the output mode is realized through a second motor, and the initial driving state can be set to form a safety structure to prevent accidental firing.

Description

Technical Field

[0001] The present invention relates to medical surgical instruments, and more particularly to a handheld assembly of an electric surgical instrument and an electric surgical instrument using the handheld assembly. Background Art

[0002] During surgical operations, staplers are usually used to achieve tissue resection and wound closure. Staplers include linear cutting staplers, circular staplers, laparoscopic linear cutting staplers, etc. These staplers can be used to resect diseased tissues of the lung, intestine, and stomach, and at the same time close the wound surface. During the operation, the end effector of the stapler clamps and squeezes the tissue, and then uses a cutting knife to cut the tissue. For the generated wound surface, staples are used for rapid suturing. The use of staplers shortens the operation time, improves the success rate of the operation, and the postoperative recovery is fast.

[0003] Currently used staplers mainly have two types: manual operation and electric operation. During the operation, the front end of the stapler must be used to clamp the tissue to be cut and make preparations before firing. For a manually operated stapler, during the firing process of the stapler, the doctor must hold the stapler in the air and press the handle at the same time to complete the firing. During the entire firing process, the hand provides two forces: support and pressing, which is prone to shaking of the stapler caused by shaking of the hand. At the same time, the manual firing force is not stable and uniform enough. Especially for a linear cutting stapler, multiple presses of the handle are required to complete the entire firing process. After each press of the handle, the handle needs to be released before the next press of the handle. This process of releasing the handle causes the cutting knife to stop advancing, and the pusher plate also stops moving, and the thrust on the staples also rapidly drops to zero. As a result, there are defects in the formation of the staples, and the cutting surface of the cutting knife is not smooth. These problems are more obvious at the position where the handle is released.

[0004] For an electric stapler, a doctor only needs to hold the stapler stably and make the cutting knife and staples move by pressing a button, which can achieve the smooth movement of the cutting knife and the smooth and continuous suturing of the staples, thus effectively ensuring the cutting effect. Comparative studies have shown that: compared with the use of manual staplers, the bleeding complications of using electric staplers are reduced by nearly half, while the hospitalization costs paid by patients are reduced by nearly 10%, and the discharge time is advanced by one day (Impact of Powered and Tissue-Specific Endoscopic Stapling Technology on Clinical and Economic Outcomes of Video-Assisted Thoracic Surgery Lobectomy Procedures: A Retrospective, Observational Study, Daniel L. Miller et al., Advances in Therapy, (2018) 35: 707–723). The operating actions of the electric stapler include the closing and firing of the cartridge assembly, the swinging movement of the cartridge assembly, and the rotation of the cartridge assembly around its own axis. Since the movement modes of the cartridge assembly are relatively numerous, the existing electric staplers usually adopt a power source with multiple high-power motors to control each action respectively, resulting in high costs, large weights, and complex structures of the electric staplers. Summary of the Invention

[0005] To solve one or more existing problems, the present invention provides a handheld assembly of an electric surgical instrument, which can achieve tissue cutting and staple firing in a motor-driven manner. The present invention provides a handheld assembly of an electric surgical instrument that uses a high-power motor to stably fire the cartridge assembly. The present invention provides a handheld assembly of an electric surgical instrument that uses a high-power motor to achieve the swinging, closing, and firing of the cartridge assembly; and uses a low-power motor to achieve the switching of the driving mode. The present invention provides an electric surgical instrument that can achieve smooth cutting of tissue and effective suturing. The handheld assembly of the electric surgical instrument provided by the present invention achieves the swinging, closing, and firing of the cartridge assembly through a first motor. It can improve the surgical efficiency and reduce the influence brought by manual operation. It can achieve stable cutting of the cutting assembly and effective suturing of the staples. It reduces postoperative bleeding and accelerates the patient's recovery. It reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, the initial driving state is set through a second motor, forming an anti-misfiring insurance structure.

[0006] The present invention provides a hand-held assembly for an electric surgical instrument, characterized in that the hand-held assembly comprises: a power supply assembly; a drive assembly including a drive gear and a first motor; a switching assembly capable of engaging with the drive assembly to obtain power input; the switching assembly comprising a shaft, a first gear assembly, a second gear assembly, a third gear assembly and an output switching part; the first gear assembly, the second gear assembly and the third gear assembly are arranged on the shaft; the first gear assembly meshes with the drive gear of the drive assembly; the output switching part comprises a second motor, a transmission rod and an engaging member; the output switching part can make the switching assembly be in a first output mode or a second output mode; a first power output assembly including a first power gear, a first rotary drive rod, a first transmission member and a first transmission rod assembly; the first power gear is fixedly connected to the first rotary drive rod, so that the first power gear and the first rotary drive rod can rotate synchronously; the first rotary drive rod and the first transmission member cooperate with each other, so that the first rotary drive rod can drive the first transmission member to move along the first rotary drive rod; the first transmission member is connected to the first transmission rod; a second power output assembly including a second power gear, a second rotary drive rod, a second transmission member and a second transmission rod assembly; the second power gear is fixedly connected to the second rotary drive rod, so that the second power gear and the second rotary drive rod can rotate synchronously; the second rotary drive rod and the second transmission member cooperate with each other, so that the second rotary drive rod can drive the second transmission member to move along the second rotary drive rod; the second transmission member is fixedly connected to the second transmission rod; a control circuit connecting the drive assembly and the switching assembly; and a housing part; wherein, when the switching assembly is in the first output mode, the second gear assembly of the switching assembly can mesh with the first power gear; when the switching assembly is in the second output mode, the third gear assembly of the switching assembly can mesh with the second power gear. The power from the drive assembly is selectively transmitted to the first power output assembly or the second power output assembly through the motor-driven switching assembly, realizing the selection of the power output path. At the same time, for the one-out-of-two switching, the switching assembly constitutes a structure similar to an insurance to prevent accidental triggering of other transmission structures.

[0007] The first gear assembly of the switching component includes a first gear, a first meshing portion, and a second meshing portion; the first gear meshes with the drive gear of the drive component; the second gear assembly includes a second gear and a third meshing portion; the third gear assembly includes a third gear and a fourth meshing portion; in the first output mode, the first meshing portion of the first gear assembly meshes with the third meshing portion of the second gear assembly, so that the first gear assembly and the second gear assembly can rotate synchronously; the second gear of the second gear assembly meshes with the first power gear of the first power output component; in the second output mode, the second meshing portion of the first gear assembly meshes with the fourth meshing portion of the third gear assembly, so that the first gear assembly and the third gear assembly can rotate synchronously; the third gear of the third gear assembly meshes with the second power gear of the second power output component. After the first gear assembly meshes with the second gear assembly or the third gear assembly, the power from the drive component is transmitted to the first power output component or the second power output component through the second gear assembly or the third gear assembly. The switching of the power transmission path is realized.

[0008] The first gear assembly of the switching component includes a first gear, and the first gear meshes with the drive gear of the drive component; the second gear assembly includes a second gear; the third gear assembly includes a third gear; the first gear, the second gear, and the third gear are connected to each other and can rotate simultaneously; in the first output mode, the second gear meshes with the first power gear of the first power output component; in the second output mode, the third gear meshes with the second power gear of the second power output component. Different structures are provided to directly output the power to the first power output component or the second power output component through the second gear and the third gear.

[0009] The first gear assembly is located between the second gear assembly and the third gear assembly; or the first gear assembly is located on one side of the second gear assembly and the third gear assembly. The second gear assembly and the third gear assembly can be located on different sides or the same side of the first gear assembly to realize the selective transmission of power.

[0010] The handheld assembly further includes a manual rotation part, and the manual rotation part includes a rotary grip, a rotary dial and a connecting rod; the rotary grip is rotatably connected to the housing; the rotary grip is fixedly connected to the connecting rod, and the connecting rod is used to connect the staple cartridge assembly; at least a part of the first transmission rod assembly of the first power output assembly is arranged in the internal space of the manual rotation part, and at least a part of the first transmission rod assembly can rotate with the rotary dial; at least a part of the second transmission rod assembly of the second power output assembly is arranged in the internal space of the manual rotation part; at least a part of the second transmission rod assembly can rotate with the rotary dial. Manual rotation is used to control the posture of the staple cartridge to ensure that the staple cartridge is aligned with the part to be cut.

[0011] The handheld assembly further includes a closing grip assembly; the closing grip assembly includes a closing grip and a clamping part; the clamping part is detachably clamped with the first transmission assembly; the closing grip assembly can rotate around a fixed axis, so as to move the first transmission part of the first power output assembly from a first position to a second position; when in the first position, the clamping part is clamped with the first transmission assembly; when in the second position, the first transmission part can be separated from the clamping part.

[0012] The handheld assembly further includes a reset assembly; when the closing grip assembly moves the first transmission assembly to the second position, the grip reset assembly can fixedly hold the closing grip assembly in the corresponding position.

[0013] The handheld assembly further includes a swing head steering control button, and the swing head steering control button provides a first-direction rotation control signal, a second-direction rotation control signal and / or a reset control signal to the control circuit, and the control circuit is used to control the movement of the second power output assembly according to the first-direction rotation control signal, the second-direction rotation control signal or the reset control signal.

[0014] The handheld assembly further includes a firing button assembly, and the firing button assembly is arranged on the closing grip assembly or on the housing part; the firing button assembly is connected to the control circuit and is used to provide a signal for controlling the movement of the first power output assembly.

[0015] The present invention also provides an electric surgical instrument, characterized in that the electric surgical instrument is an electric stapler for linear cutting, and the electric stapler includes: a staple cartridge assembly and the handheld assembly according to any one of the foregoing.

[0016] The handheld assembly of the electric surgical instrument provided by the present invention realizes the swinging, closing, and firing of the staple cartridge assembly through the first motor. It can improve the surgical efficiency and reduce the influence brought by manual operation. It can achieve stable cutting of the cutting assembly and effective suturing of the staples. It reduces postoperative bleeding and accelerates the patient's recovery. It reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, the second motor is used to set the initial driving state, forming a safety structure to prevent accidental firing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of an electric surgical instrument according to the first embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the movement of the staple cartridge assembly;

[0019] Figure 3 is a schematic diagram of a partial structure of an electric surgical instrument according to the first embodiment of the present invention;

[0020] Figure 4 is a partial schematic diagram of a switching assembly according to the first embodiment of the present invention;

[0021] Figure 5 is an exploded schematic diagram of a switching assembly according to the first embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of a partial structure of an electric surgical instrument according to the second embodiment of the present invention;

[0023] Figure 7 is a partial schematic diagram of a switching assembly according to the second embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of a partial structure of an electric surgical instrument according to the third embodiment of the present invention;

[0025] Figure 9 is a partial schematic diagram of a switching assembly according to the third embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Figure 1 is a schematic diagram of an electric surgical instrument according to the first embodiment of the present invention. The electric stapler 10 includes: a staple cartridge assembly 100 and a handheld assembly 200. The staple cartridge assembly 100 can be an existing staple cartridge assembly with a swingable head, which includes an anvil, a staple cartridge, a cutting knife assembly, and a transmission assembly. The transmission assembly receives an external force drive to realize the swinging, opening, closing, and firing of the staple cartridge. Figure 2It is a schematic diagram of the movement of the staple cartridge assembly. The movement forms that the staple cartridge assembly 100 can achieve under the drive of the handheld assembly 200 are shown, including the head-swinging movement and the rotation about its own axis.

[0027] Figure 3 It is a schematic diagram of the partial structure of the electric surgical instrument according to the first embodiment of the present invention; Figure 4 It is a partial schematic diagram of the switching component according to the first embodiment of the present invention; Figure 5 It is an exploded schematic diagram of the switching component according to the first embodiment of the present invention. The handheld assembly 200 includes: a drive assembly 2010, a switching assembly 2020, a first power output assembly 2030, a second power output assembly 2040, a manual rotation part 2050, a power supply assembly 2060, a control circuit 2070, and a housing part 2080. The drive assembly 2010 includes a first motor 2011 and a drive gear 2012, and the first motor 2011 has a drive shaft 20111. The drive gear is arranged on the drive shaft 20111 and rotates with the drive shaft 20111. The drive assembly 2010 may further include a reduction gearbox 20112 and / or an encoder arranged in cooperation with the first motor.

[0028] The switching assembly 2020 can be engaged with the drive assembly 2010. The switching assembly 2020 includes a first gear assembly 2021, a second gear assembly 2022, a third gear assembly 2023, a shaft 2024, a switching fork 2025, a second motor 2026, and a drive rod 2027. The output switching part includes the switching fork 2025, the second motor 2026, and the drive rod 2027 therein. The first gear assembly 2021, the second gear assembly 2022, and the third gear assembly 2023 are arranged on the shaft 2024 and can rotate about the shaft 2024. The first gear assembly 2021 includes a first gear part 20211, a first engagement part 20212, and a second engagement part 20213. The first gear part 20211 is engaged with the drive gear 2012 of the drive assembly 2010 to receive the power input of the drive assembly 2010. The second gear assembly 2022 includes a second gear part 20221 and a third engagement part 20222; the third gear assembly 2023 includes a third gear part 20231 and a fourth engagement part 20232.

[0029] The first meshing portion 20212 of the first gear assembly 2021 can mesh with the third meshing portion 20222 of the second gear assembly 2022, enabling the first gear assembly 2021 and the second gear assembly 2022 to rotate synchronously; the second meshing portion 20213 of the first gear assembly 2021 can mesh with the fourth meshing portion 20232 of the third gear assembly 2023, enabling the first gear assembly 2021 and the third gear assembly 2023 to rotate synchronously. Pressing the switching switch located on the housing drives the second motor 2026, and the second motor 2026 drives the switching fork 2025 through the driving rod 2027, which can cause the first gear assembly 2021 to switch between at least two positions. When the switching fork 2025 pushes the first gear assembly 2021 to the first position, the first meshing portion 20212 of the first gear assembly 2021 meshes with the third meshing portion 20222 of the second gear assembly 2022, enabling the first gear assembly 2021 and the second gear assembly 2022 to rotate synchronously. When the first gear assembly 2021 is pushed to the second position by driving the switching fork 2025, the second meshing portion 20213 of the first gear assembly 2021 meshes with the fourth meshing portion 20232 of the third gear assembly 2023, enabling the first gear assembly 2021 and the third gear assembly 2023 to rotate synchronously.

[0030] Based on the above structure, the switching assembly 2020 realizes the input of the power obtained from the driving assembly 2010 and outputs it to other components in a switchable manner through the second gear assembly 2022 and the third gear assembly 2023. The three gear assemblies of the first gear assembly 2021, the second gear assembly 2022, and the third gear assembly 2023 are arranged coaxially. Although Figure 1 a specific gear diameter relationship of the gear assemblies is shown, this is not a limitation on the gear diameter relationship, and the gear diameter relationship can be appropriately adjusted according to the transmission ratio.

[0031] The first power output assembly 2030 includes a first power gear 2031, a first rotary drive rod 2032, a first transmission member 2033, and a first transmission rod assembly 2034; the first power gear 2031 can mesh with the second gear assembly 2022 of the switching assembly 2020. The first rotary drive rod 2032 cooperates with the first transmission member 2033, enabling the first rotary drive rod 2032 to drive the first transmission member 2033 to move substantially in a straight line. The first transmission member 2033 is connected to the first transmission rod assembly 2034 to achieve power transmission. The first transmission rod assembly 2034 can cooperate with the staple cartridge assembly 100 to control the closing of the anvil and the staple cartridge and the firing of the staples.

[0032] When the second motor 2026 is used to drive the switching fork 2025 to push the first gear assembly 2021 to the first position, the first engaging portion 20212 of the first gear assembly 2021 meshes with the third engaging portion 20222 of the second gear assembly 2022, so that the first gear assembly 2021 and the second gear assembly 2022 can rotate synchronously. Since the second gear portion 20221 of the second gear assembly 2022 is in meshing engagement with the first power gear 2031 of the first power output assembly 2030, the power from the drive assembly 2010 is transmitted to the first power output assembly 2030. The power is transmitted from the first transmission rod assembly 2034 of the first power output assembly 2030 to the staple cartridge assembly. The first rotary drive rod 2032 is rotatable. The first rotary drive rod 2032 can be a lead screw or a screw rod that is at least partially threaded. The first transmission member 2033 is engaged with the thread of the lead screw or the screw rod.

[0033] The second power output assembly 2040 includes a second power gear 2041, a second rotary drive rod 2042, a second transmission member 2043, and a second transmission rod assembly 2044. The second power gear 2041 can mesh with the third gear assembly 2023 of the switching assembly 2020. The second rotary drive rod 2042 and the second transmission member 2043 cooperate with each other, so that the second rotary drive rod 2042 can drive the second transmission member 2043 to move substantially linearly. The second transmission member 2043 is fixedly connected to the second transmission rod assembly 2044. The second transmission rod assembly 2044 includes a connecting claw 20441 and a sleeve 20442. The connecting claw 20441 is connected to the sleeve 20442. The sleeve 20442 can rotate and remains connected to the connecting claw 20441. The second transmission rod assembly 2044 transmits power in the forward or backward direction by pushing and pulling the sleeve 20442, further driving the staple cartridge assembly 100 and controlling the swinging movement of the staple cartridge assembly 100. The second transmission rod assembly 2044 can rotate partially and maintain the power output in the axial direction.

[0034] Press the changeover switch located on the housing to drive the second motor 2026. The second motor 2026 drives the changeover fork 2025 through the drive rod 2027. When the first gear assembly 2021 is pushed to the second position, the first gear assembly 2021 meshes with the third gear assembly 2023, and the third gear portion 20231 of the third gear assembly 2023 is in a meshing state with the second power gear 2041 of the second power output assembly 2040. Therefore, the power from the drive assembly 2010 is transmitted to the second power output assembly 2040. The power is transmitted from the second transmission rod assembly 2044 of the second power output assembly 2040 to the staple cartridge assembly. The second rotary drive rod 2042 is rotatable. The second rotary drive rod 2042 can be a lead screw or a screw rod that is at least partially threaded. The second transmission member 2043 is engaged with the thread of the lead screw or the screw rod.

[0035] The drive shaft 20111 of the drive assembly 2010 is substantially parallel to the shaft 2024 of the changeover assembly 2020. Further, the drive shaft 20111 of the drive assembly 2010 is substantially parallel to the first rotary drive rod 2032 of the first power output assembly 2030. Further, the drive shaft 20111 of the drive assembly 2010 is substantially parallel to the second rotary drive rod 2042 of the second power output assembly 2040.

[0036] The power supply assembly 2060 is used to provide electrical energy. The power supply assembly 2060 can include one or more batteries, and the batteries can be rechargeable batteries or disposable batteries.

[0037] The control circuit 2070 includes an input port and an output port. The input signal is obtained through the input port, and the output signal is provided through the output port. The control circuit 2070 is connected to the drive assembly 2010 and controls the drive assembly 2010. The control circuit 2070 is also connected to the changeover assembly 2020 and controls the changeover assembly 2020.

[0038] The housing portion 2080 can be used to accommodate the drive assembly 2010, the changeover assembly 2020, the power supply assembly 2060, and the control circuit 2070. And it can accommodate at least a part of the first power output assembly 2030 and the second power output assembly 2040.

[0039] The handheld assembly 200 further includes a manual rotation part 2050 for controlling the rotation of the staple cartridge assembly 100 about its axis. The manual rotation part 2050 includes a rotation dial 2051 and a connecting rod 2052. The rotation dial 2051 is rotatably connected to the housing part 2080, and the rotation dial 2051 is fixedly connected to the connecting rod 2052, and the connecting rod 2052 is used to connect the staple cartridge assembly 100. The rotation dial 2051 and the connecting rod 2052 of the manual rotation part 2050 have an internal space for accommodating at least a part of the first power output assembly 2030 and the second power output assembly 2040. The first transmission rod assembly 2034 of the first power output assembly 2030 may be located in the internal space. The rotatable transmission assembly 2045 and the third transmission rod 2044 of the second power output assembly 2040 may be located in the internal space. When the manual rotation part 2050 is rotated, the staple cartridge assembly 100 is driven to rotate about its own axis through the connecting rod 2052. The first transmission rod assembly 2034 of the first power output assembly 2030 may extend into the internal space of the manual rotation part 2050, and the second transmission rod assembly 2044 of the second power output assembly 2040 may extend into the internal space of the manual rotation part 2050.

[0040] The handheld assembly 200 further includes a closing grip assembly 2090. The closing grip assembly 2090 includes a closing grip part 2091 and a clamping part 2092. The clamping part 2092 is detachably clamped with the first transmission member 2033, so that when the clamping part 2092 can move the first transmission member 2033 from the first position to the second position, and at the second position, the clamping part 2092 is separated from the first transmission member 2033. The first transmission member 2033 can transmit the power provided by the closing grip assembly 2090 and realize the closing of the anvil and the staple cartridge of the staple cartridge assembly 100.

[0041] The handheld assembly 200 further includes a grip reset button 2100 that can hold the closing grip assembly 2090 in a specific position, such as the position where the closing clamping part 2092 is separated from the first transmission assembly.

[0042] The handheld assembly 200 further includes a swing head steering control button 2110. The swing head steering control button 2110 is connected to the control circuit 2070 and provides a first-direction rotation control signal, a second-direction rotation control signal, or a reset control signal to the control circuit 2070. The control circuit 2070 controls the drive assembly 2010 according to the first-direction rotation control signal, the second-direction rotation control signal, or the reset control signal to achieve the swing head steering of the staple cartridge assembly in the first direction or the second direction, or reset. The swing head steering control button 2110 can be a controller with one or more signal output terminals for providing various control signals.

[0043] The handheld assembly 200 further includes a firing button assembly 2120; the firing button assembly 2120 is connected to the control circuit 2070 and is used to provide a signal for firing the staple cartridge assembly 100. When the firing button assembly 2120 is pressed, the firing button assembly 2120 provides a firing signal to the signal input port of the control circuit 2070. The output port of the control circuit 2070 outputs a signal to the drive assembly 2010 to drive the drive assembly to move and output power outward. The power is transmitted to the staple cartridge assembly to drive the pusher and the cutter therein, so as to achieve the firing of the staple cartridge assembly 100 and complete the cutting and suturing of tissues. The firing button assembly 2120 can be arranged on the closed grip assembly or on the housing part.

[0044] Figure 6 is a schematic diagram of a partial structure of an electric surgical instrument according to the second embodiment of the present invention; Figure 7It is a partial schematic diagram of a switching component according to the second embodiment of the present invention. The switching component 2220 can be engaged with the driving component 2010. The switching component 2220 includes a first gear assembly 2221, a second gear assembly 2222, a third gear assembly 2223, a shaft 2224, a switching fork 2225, a second motor 2226, and a lead screw 2227. The first gear assembly 2221 is located between the second gear assembly 2222 and the third gear assembly 2223. The first gear assembly 2221, the second gear assembly 2222, and the third gear assembly 2223 are interconnected and arranged on the shaft 2224. The first gear assembly 2221, the second gear assembly 2222, and the third gear assembly 2223 can rotate simultaneously. The first gear assembly 2221 includes a first gear portion. The second gear assembly 2222 includes a second gear portion. And the third gear assembly 2223 includes a third gear portion. The first gear assembly 2221 is engaged with the driving gear 2012 of the driving component 2010 and receives the power input of the driving component 2010. By driving the second motor 2226 to drive the switching fork 2225, the first gear assembly 2221 can be switched between at least two positions. When the switching fork 2225 pushes the first gear assembly 2221 to the first position, the second gear assembly 2222 is in an engaged state with the first power gear portion 2031 of the first power output component 2030. The third gear assembly 2223 is separated from the second power output component 2040. It realizes the transmission of the power from the driving component 2010 to the first power output component 2030. When the switching fork 2225 pushes the first gear assembly 2221 to the second position, the third gear assembly 2223 is engaged with the second power gear portion 2041 of the second power output component 2040, while the second gear assembly 2222 is separated from the first power output component 2030. It realizes the transmission of the power from the driving component 2010 to the second power output component 2040.

[0045] Based on the above structure, the switching component 2220 realizes the power input obtained from the driving component 2010 and outputs it to other components in a switchable manner through the second gear assembly 2222 and the third gear assembly 2223. The three gear assemblies, namely the first gear assembly 2221, the second gear assembly 2222, and the third gear assembly 2223, are arranged coaxially.

[0046] Figure 8 It is a partial structural schematic diagram of an electric surgical instrument according to the third embodiment of the present invention; Figure 923 is a partial schematic diagram of a switching assembly according to a third embodiment of the present invention. The switching assembly 2320 can mesh with the driving assembly 2010, and the switching assembly 2320 includes a first gear assembly 2321, a second gear assembly 2322, a third gear assembly 2323, a shaft 2324, a switching fork 2325, a second motor 2326, and a screw rod 2327; the second gear assembly 2322 and the third gear assembly 2323 are located on the same side of the first gear assembly 2321, although Figure 8 It is only listed that the second gear assembly 2322 is located between the first gear assembly 2321 and the third gear assembly 2323; in actual situations, the third gear assembly 2323 may also be located between the first gear assembly 2321 and the second gear assembly 2322. The first gear assembly 2321, the second gear assembly 2322 and the third gear assembly 2323 are connected to each other and are arranged on the shaft 2324; the second gear assembly 2322 and the third gear assembly 2323 may be directly fixedly connected, and the first gear assembly may be connected to the second gear assembly 2322 through a connecting tube 2328. The first gear assembly 2321, the second gear assembly 2322 and the third gear assembly 2323 can rotate simultaneously. The first gear assembly 2321 includes a first gear portion; the second gear assembly 2322 includes a second gear portion; and the third gear assembly 2323 includes a third gear portion. The first gear assembly 2321 is meshed with the driving gear 2012 of the driving assembly 2010 to receive the power input of the driving assembly 2010. The first gear assembly 2321 can be switched between at least two positions by toggling the switching fork 2325. By driving the second motor 2326 to drive the switching fork 2325, the first gear assembly 2321 can be pushed to the first position, the second gear assembly 2322 is in meshing state with the first power gear portion 2031 of the first power output assembly 2030; the third gear assembly 2323 is separated from the second power output assembly 2040; and the power from the driving assembly 2010 is delivered to the first power output assembly 2030. When the switching fork 2325 pushes the first gear assembly 2321 to the second position, the third gear assembly 2323 is meshing with the second power gear portion 2041 of the second power output assembly 2040, and the second gear assembly 2322 is separated from the first power output assembly 2030; and the power from the driving assembly 2010 is delivered to the second power output assembly 2040.

[0047] Based on the above structure, the switching component 2320 realizes the input of power obtained from the driving component 2010 and outputs it to other components in a switchable manner through the second gear component 2322 and the third gear component 2323. The three gear components, namely the first gear component 2321, the second gear component 2322, and the third gear component 2323, are arranged coaxially.

[0048] During the surgical procedure, the cartridge assembly of the stapler with the cartridge is brought close to the tissue to be clamped (such as the lung or stomach). During the clamping process, the cartridge can be rotated by swinging its head (at this time, the switching fork 2025, 2225, or 2325 is driven by the second motor, and the switching component 2020, 2220, or 2320 is maintained in a state of meshing with the second power output component. At this time, the switching fork plays an insurance role. Since it is not meshed with the first power output component, accidental firing of the cartridge assembly during the operation is prevented), and the appropriate clamping position can be selected by rotating around the axis. The swinging head movement is realized by driving the second power transmission device 2040, and the rotation around the axis is realized by rotating the manual rotation part 2050. After approaching the tissue, the closing grip assembly 2090 is pressed. The closing grip assembly 2090 causes the first connecting piece 2033 to move from the initial first position along the first rotation drive rod 2032 to the second position. At this time, the closing grip assembly 2090 and the first connecting piece 2033 are in a separable state, and the grip return button 2100 holds the closing grip assembly 2090 in this position. The switching fork 2025, 2225, or 2325 is toggled to move the switching component 2020, 2220, or 2320 to a position meshing with the first power output component 2030. The firing button assembly 2120 is pressed to provide a firing signal to the control circuit, causing the driving component 2010 to output power, and this power is transmitted to the first power output component 2020 to drive the cutting knife of the cartridge assembly 100 to complete the cutting, and at the same time, the staple sutures the wound surface. Then, the driving component 2010 provides a reverse driving force to retract the cutting knife. The grip return button 2100 is released to close the grip and reset it. The first transmission piece 2033 retracts, the cartridge assembly 100 opens, and the clamped tissue is released. The stapler is withdrawn.

[0049] The handheld assembly of the electric surgical instrument provided by the present invention realizes the swinging, closing and firing of the staple cartridge assembly through the first motor. It can improve the surgical efficiency and reduce the influence brought by manual operation. It can achieve stable cutting of the cutting assembly and effective suturing of the anastomosis staples. It reduces postoperative bleeding and accelerates the patient's recovery. It reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, the mode switching is realized through the second motor, and the initial driving state can be set, forming a safety structure to prevent accidental firing. The electric surgical instrument provided by the present invention can stably fire the staple cartridge assembly by using a high-power motor to realize the swinging, closing and firing of the staple cartridge assembly; at the same time, a low-power motor is used to realize the switching of the driving mode. It realizes stable cutting of tissues and effective suturing, improves surgical efficiency, and reduces the influence brought by manual operation. At the same time, it reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, the initial driving state is set through the second motor, forming a safety structure to prevent accidental firing.

[0050] The above is an illustration of the preferred embodiments of the present invention, but it should not be construed as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to vary. All changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. An electric surgical instrument handheld assembly, characterized in that, the handheld assembly comprises: a power supply assembly; a drive assembly including a drive gear and a first motor; a switching assembly, the switching assembly being capable of engaging with the drive assembly to obtain power input; the switching assembly includes a shaft, a first gear assembly, a second gear assembly, a third gear assembly and an output switching part; the first gear assembly, the second gear assembly and the third gear assembly are arranged on the shaft; the first gear assembly meshes with the drive gear of the drive assembly; the output switching part includes a second motor, a drive rod and a switching fork, and the second motor drives the switching fork through the drive rod to enable the first gear assembly to switch between at least two positions; thereby the output switching part can make the switching assembly be in a first output mode or a second output mode; a first power output assembly, including a first power gear, a first rotary drive rod, a first transmission member and a first transmission rod assembly; the first power gear is fixedly connected to the first rotary drive rod, so that the first power gear and the first rotary drive rod can rotate synchronously; the first rotary drive rod and the first transmission member cooperate with each other, so that the first rotary drive rod can drive the first transmission member to move along the first rotary drive rod; the first transmission member is connected to the first transmission rod assembly; a second power output assembly, including a second power gear, a second rotary drive rod, a second transmission member and a second transmission rod assembly; the second power gear is fixedly connected to the second rotary drive rod, so that the second power gear and the second rotary drive rod can rotate synchronously; the second rotary drive rod and the second transmission member cooperate with each other, so that the second rotary drive rod can drive the second transmission member to move along the second rotary drive rod; the second transmission member is fixedly connected to the second transmission rod; a control circuit, the control circuit being connected to the drive assembly and the switching assembly; and a housing part; wherein, when the switching assembly is in the first output mode, the second gear assembly of the switching assembly can mesh with the first power gear; when the switching assembly is in the second output mode, the third gear assembly of the switching assembly can mesh with the second power gear, the first gear assembly of the switching assembly includes a first gear, a first engaging part and a second engaging part; the first gear meshes with the drive gear of the drive assembly; the second gear assembly includes a second gear and a third engaging part; the third gear assembly includes a third gear and a fourth engaging part; in the first output mode, the first engaging part of the first gear assembly meshes with the third engaging part of the second gear assembly, so that the first gear assembly and the second gear assembly can rotate synchronously; the second gear of the second gear assembly meshes with the first power gear of the first power output assembly; In the second output mode, the second meshing portion of the first gear assembly meshes with the fourth meshing portion of the third gear assembly, so that the first gear assembly and the third gear assembly can rotate synchronously; the third gear of the third gear assembly meshes with the second power gear of the second power output assembly.

2. A hand-held assembly of an electric surgical instrument, characterized in that the hand-held assembly includes: a power supply assembly; a drive assembly including a drive gear and a first motor; a switching assembly capable of engaging with the drive assembly to obtain power input; the switching assembly includes a shaft, a first gear assembly, a second gear assembly, a third gear assembly and an output switching portion; the first gear assembly, the second gear assembly and the third gear assembly are arranged on the shaft; the first gear assembly meshes with the drive gear of the drive assembly; the output switching portion includes a second motor, a drive rod and a switching fork, and the second motor drives the switching fork through the drive rod to enable the first gear assembly to switch between at least two positions; thus, the output switching portion can make the switching assembly be in a first output mode or a second output mode; a first power output assembly including a first power gear, a first rotary drive rod, a first transmission member and a first transmission rod assembly; the first power gear is fixedly connected to the first rotary drive rod, so that the first power gear and the first rotary drive rod can rotate synchronously; the first rotary drive rod and the first transmission member cooperate with each other, so that the first rotary drive rod can drive the first transmission member to move along the first rotary drive rod; the first transmission member is connected to the first transmission rod assembly; a second power output assembly including a second power gear, a second rotary drive rod, a second transmission member and a second transmission rod assembly; the second power gear is fixedly connected to the second rotary drive rod, so that the second power gear and the second rotary drive rod can rotate synchronously; the second rotary drive rod and the second transmission member cooperate with each other, so that the second rotary drive rod can drive the second transmission member to move along the second rotary drive rod; the second transmission member is fixedly connected to the second transmission rod; a control circuit connecting the drive assembly and the switching assembly; and a housing portion; wherein, when the switching assembly is in the first output mode, the second gear assembly of the switching assembly can mesh with the first power gear; when the switching assembly is in the second output mode, the third gear assembly of the switching assembly can mesh with the second power gear, the first gear assembly of the switching assembly includes a first gear meshing with the drive gear of the drive assembly; the second gear assembly includes a second gear; the third gear assembly includes a third gear; the first gear, the second gear and the third gear are connected to each other and can rotate simultaneously; In the first output mode, the second gear meshes with the first power gear of the first power output assembly; In the second output mode, the third gear meshes with the second power gear of the second power output assembly.

3. The handheld assembly according to claim 2, wherein, the first gear assembly is located between the second gear assembly and the third gear assembly; or the first gear assembly is located on one side of the second gear assembly and the third gear assembly.

4. The handheld assembly according to any one of claims 1-3, wherein, the handheld assembly further includes a manual rotation part, and the manual rotation part includes a rotary grip rotary dial and a connecting rod; the rotary grip rotary dial is rotatably connected to the housing; the rotary grip rotary dial is fixedly connected to the connecting rod, and the connecting rod is used for connecting the staple cartridge assembly; at least a part of the first transmission rod assembly of the first power output assembly is arranged in the internal space of the manual rotation part, and at least a part of the first transmission rod assembly can rotate with the rotary grip rotary dial; at least a part of the second transmission rod assembly of the second power output assembly is arranged in the internal space of the manual rotation part; at least a part of the second transmission rod assembly can rotate with the rotary grip rotary dial.

5. The handheld assembly according to any one of claims 1-3, wherein, the handheld assembly further includes a closing grip assembly; the closing grip assembly includes a closing grip and a clamping part; the clamping part is detachably clamped with the first transmission part; the closing grip assembly can rotate around a fixed axis, so as to move the first transmission part of the first power output assembly from a first position to a second position; when in the first position, the clamping part and the first transmission part are clamped with each other; when in the second position, the first transmission part can be separated from the clamping part.

6. The handheld assembly according to claim 5, wherein, the handheld assembly further includes a reset assembly; when the closing grip assembly moves the first transmission part to the second position, the reset assembly can fixedly hold the closing grip assembly in the corresponding position.

7. The handheld assembly according to any one of claims 1-3, wherein, the handheld assembly further includes a swing head steering control button, and the swing head steering control button provides a first-direction rotation control signal, a second-direction rotation control signal and / or a reset control signal to the control circuit, and the control circuit is used to control the movement of the second power output assembly according to the first-direction rotation control signal, the second-direction rotation control signal or the reset control signal.

8. The handheld assembly according to any one of claims 1-3, wherein, the handheld assembly further includes a firing button assembly, and the firing button assembly is arranged on the closing grip assembly or on the housing part; the firing button assembly is connected to the control circuit and is used to provide a signal for controlling the movement of the first power output assembly.

9. An electric surgical instrument, wherein, The electric surgical instrument is an electric stapler for linear cutting, and the electric stapler includes: a cartridge assembly and a handheld assembly as described in any one of claims 1-8.

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