CN111227890A

CN111227890A - Handheld subassembly of electronic surgical instruments and electronic surgical instruments

Info

Publication number: CN111227890A
Application number: CN201811443603.3A
Authority: CN
Inventors: 李学军; 赵博; 张晋辉; 王洪权; 夏磊磊; 赵延瑞; 代立军; 蒋婷
Original assignee: BEIJING BIOSIS HEALING BIOLOGICAL TECHNOLOGY CO LTD
Current assignee: BEIJING BIOSIS HEALING BIOLOGICAL TECHNOLOGY CO LTD
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2020-06-05

Abstract

The invention relates to a handheld component of an electric surgical instrument and the electric surgical instrument. The hand-held assembly of the electric surgical instrument comprises: 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 comprises an output switching part with a motor; the output switching section can put the switching member in a first output mode or a second output mode. The handheld component of the electric surgical instrument provided by the invention realizes swinging, closing and firing of the nail bin component through the first motor. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, the switching of the output modes is realized through the second motor, the initial driving state can be set, and a safety structure for preventing error triggering is formed.

Description

Handheld subassembly of electronic surgical instruments and electronic surgical instruments

Technical Field

The invention relates to a medical surgical operation instrument, in particular to a handheld component of an electric operation instrument and the electric operation instrument using the handheld component.

Background

Staplers are commonly used in surgery to achieve resection of tissue and sealing of a wound. The anastomat comprises a linear cutting anastomat, a tubular anastomat, a linear cutting anastomat under an endoscope and the like. These staplers can be used to excise diseased tissues of the lung, intestine, stomach, while sealing the wound. In the operation process, the end effector of the anastomat clamps and extrudes tissues, then the cutting knife is used for cutting the tissues, and the generated wound surface is quickly sutured by using the anastomosis nail. The use of the anastomat shortens the operation time, improves the success rate of the operation and has quick postoperative recovery.

The currently used staplers are mainly operated by hand or by electric. In the operation process, the front end of the anastomat is required to clamp the tissue to be cut, and the preparation before firing is well made. For a manually operated stapler, in the process of firing the stapler, a doctor needs to press a handle while holding the stapler in the air to complete firing. In the whole firing process, the hand provides two forces of supporting and pressing, and the shaking of the anastomat caused by the shaking of the hand is easy to occur. Meanwhile, the force application of manual firing is not stable and uniform enough, especially for a linear cutting anastomat, the whole firing process can be completed only by pressing the handle for many times during firing, after the handle is pressed for each time, the handle needs to be loosened to press the handle for the next time, the cutting knife stops advancing in the process of loosening the handle, the nail pushing sheet stops moving, and the thrust for the anastomosis nail also rapidly drops to zero. The formation of the anastomosis nail has defects, the cutting wound surface of the cutting knife is not smooth, and the problem is more obvious particularly at the position of the loosening handle.

And to electronic anastomat, the doctor only needs stably to hold the anastomat, makes cutting knife and anastomotic nail move through the button, can realize the steady motion of cutting knife and the steady continuous sewing of anastomotic nail to effectively guaranteed cutting effect. Comparative studies show that: bleeding complications with electric staplers are reduced by nearly half, while the hospitalization costs for the patient are reduced by nearly 10% relative to manual staplers (Impact of Power and specificity-Specific Endoscopic visualization Technology on Clinical and ecoomicOutcome of Video-Assisted Clinical Lobecitomy Procedures: ARetrospective, Observative Study, Daniel L.Miller et al, Advances in Therapy, (2018)35: 707-723). The operation actions of the electric anastomat comprise closing and firing of the nail bin assembly, swinging movement of the nail bin assembly and rotation of the nail bin assembly around a self shaft, and the movement modes of the nail bin assembly are more, so that the conventional electric anastomat generally adopts a power source with a plurality of high-power motors to respectively control the actions, and the electric anastomat is high in cost, heavy and complex in structure.

Disclosure of Invention

To address one or more of the problems presented, the present invention provides a hand-held assembly of a powered surgical instrument that enables tissue cutting and staple firing to be achieved in a motor-driven manner. The invention provides a handheld assembly of an electric surgical instrument, which utilizes a high-power motor to stably fire a nail bin assembly. The invention provides a handheld assembly of an electric surgical instrument, which utilizes a high-power motor to realize swinging, closing and firing of a nail bin assembly; and the switching of the driving mode is realized by using a low-power motor. The invention provides an electric surgical instrument which can realize stable cutting and effective suturing of tissues. The handheld component of the electric surgical instrument provided by the invention realizes swinging, closing and firing of the nail bin component through the first motor. Can improve the operation efficiency and reduce the influence caused by manual operation. The stable cutting of cutting assembly and the effective sewing of anastomotic nail can be realized. Reduce postoperative bleeding and accelerate the recovery of patients. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, the initial driving state is set through the second motor, and a safety structure for preventing mistaken triggering is formed.

The present invention provides a powered surgical instrument hand-held assembly, characterized in that the hand-held assembly comprises: a power supply component; a drive assembly including a drive gear and a first motor; the switching assembly can be meshed with the driving assembly to obtain power input; the switching assembly comprises 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 is meshed with the driving gear of the driving assembly; the output switching part comprises a second motor, a transmission rod and a meshing piece; the output switching part can enable the switching component to be in a first output mode or a second output mode; the first power output assembly comprises a first power gear, a first rotary driving rod, a first transmission piece and a first transmission rod assembly; the first power gear is fixedly connected with the first rotary driving rod, so that the first power gear and the first rotary driving rod can synchronously rotate; the first rotary driving rod is matched with the first transmission piece, so that the first rotary driving rod can drive the first transmission piece to move along the first rotary driving rod; the first transmission piece is connected with the first transmission rod; the second power output assembly comprises a second power gear, a second rotary driving rod, a second transmission piece and a second transmission rod assembly; the second power gear is fixedly connected with the second rotary driving rod, so that the second power gear and the second rotary driving rod can synchronously rotate; the second rotary driving rod is matched with the second transmission piece, so that the second rotary driving rod can drive the second transmission piece to move along the second rotary driving rod; the second transmission piece is fixedly connected with the second transmission rod; a control circuit connected to the drive component and the switching component; and a housing portion; wherein the second gear assembly of the switching assembly is engageable with the first power gear when the switching assembly is in a first output mode; the third gear assembly of the shift assembly is engageable with the second power gear when the shift assembly is in the second output mode. The power from the driving assembly is selectively transmitted to the first power output assembly or the second power output assembly through the switching assembly driven by the motor, so that the power output path is selected. Meanwhile, for the switching of the alternative, a structure similar to a safety is formed by the switching assembly, and other transmission structures are prevented from being triggered by mistake.

The first gear assembly of the switching assembly comprises a first gear, a first meshing part and a second meshing part; the first gear is meshed with a driving gear of the driving assembly; the second gear assembly comprises a second gear and a third meshing part; the third gear assembly comprises a third gear and a fourth meshing part; in the first output mode, the first meshing portion of the first gear assembly and the third meshing portion of the second gear assembly are meshed with each other so that the first gear assembly and the second gear assembly can rotate synchronously; the second gear of the second gear assembly is meshed with the first power gear of the first power output assembly; in the second output mode, the second meshing part of the first gear assembly and the fourth meshing part of the third gear assembly are meshed with each other, so that the first gear assembly and the third gear assembly can rotate synchronously; the third gear of the third gear assembly is meshed with the second power gear of the second power output assembly. After the first gear assembly is meshed with the second gear assembly or the third gear assembly, the power from the driving assembly is transmitted to the first power output assembly or the second power output assembly through the second gear assembly or the third gear assembly. The switching of the power transmission path is realized.

The first gear assembly of the shifting assembly includes a first gear that meshes with a 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 with each other and can rotate simultaneously; in the first output mode, the second gear is in mesh with a first power gear of the first power output assembly; in the second output mode, the third gear is in mesh with a second power gear of the second power output assembly. Different structures are provided, and power is directly output to the first power output assembly or the second power output assembly through the second gear and the third gear.

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 positioned on different sides or the same side of the first gear assembly, so that the selective transmission of power is realized.

The handheld assembly further comprises a manual rotating part, and the manual rotating part comprises a rotating grab handle rotating thumb wheel and a connecting rod; the rotary grab handle rotary thumb wheel is connected with the shell in a rotatable manner; the rotary grab handle rotary dial wheel is fixedly connected with the connecting rod, and the connecting rod is used for connecting the nail bin assembly; at least a part of the first transmission rod assembly of the first power output assembly is arranged in the inner space of the manual rotating part, and at least a part of the first transmission rod assembly can rotate along with the manual rotating dial wheel; at least a portion of the second drive rod assembly of the second power take off assembly is disposed in an interior space of the manual rotating portion; at least a portion of the second drive rod assembly may rotate with the manually rotatable thumb wheel. The manual rotation is used for controlling the posture of the nail bin and ensuring that the nail bin is aligned to the part to be cut.

The hand-held assembly further comprises a closure grip assembly; the closed handle component comprises a closed handle and a clamping part; the clamping part is clamped with the first transmission assembly in a separable mode; the closed handle assembly is rotatable about a fixed axis to move the first transmission member of the first power take off assembly from a first position to a second position; the clamping part and the first transmission assembly are clamped with each other in a first position; when the second position, the first transmission piece can be separated from the clamping portion.

The handheld assembly further comprises a reset assembly; when the closed handle assembly moves the first transmission assembly to the second position, the handle resetting assembly can fixedly hold the closed handle assembly at the corresponding position.

The handheld assembly further comprises a head-swinging steering control button, the head-swinging steering control button provides a first-direction rotation control signal, a second-direction rotation control signal and/or a reset control signal for the control circuit, and the control circuit is used for controlling 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.

The handheld assembly further comprises a firing button assembly, and the firing button assembly is arranged on the closed handle assembly or the shell part; the firing button assembly is connected with the control circuit and used for providing a signal for controlling the first power output assembly to move.

The present invention also provides an electric surgical instrument, which is an electric stapler for linear cutting, the electric stapler including: a cartridge assembly and a hand held assembly as described in any of the preceding.

The handheld component of the electric surgical instrument provided by the invention realizes swinging, closing and firing of the nail bin component through the first motor. Can improve the operation efficiency and reduce the influence caused by manual operation. The stable cutting of cutting assembly and the effective sewing of anastomotic nail can be realized. Reduce postoperative bleeding and accelerate the recovery of patients. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, the initial driving state is set through the second motor, and a safety structure for preventing mistaken triggering is formed.

Drawings

FIG. 1 is a schematic view of a powered surgical instrument according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a cartridge assembly in motion;

FIG. 3 is a schematic view of a partial structure of a powered surgical instrument according to a first embodiment of the present invention;

FIG. 4 is a partial schematic view of a switching assembly according to a first embodiment of the present invention;

FIG. 5 is a disassembled schematic view of a switching assembly according to a first embodiment of the present invention;

FIG. 6 is a partial schematic view of a powered surgical instrument according to a second embodiment of the present invention;

FIG. 7 is a partial schematic view of a switching assembly according to a second embodiment of the invention;

FIG. 8 is a partial schematic view of a powered surgical instrument according to a third embodiment of the present invention;

fig. 9 is a partial schematic view of a switching assembly according to a third embodiment of the present invention.

Detailed Description

FIG. 1 is a schematic view of a powered surgical instrument according to a first embodiment of the present invention. The electric stapler 10 includes: a cartridge assembly 100 and a hand-held assembly 200. The cartridge assembly 100 can be an existing pivotable cartridge assembly including an anvil, a cartridge, a cutter assembly, and a drive assembly. The transmission assembly is driven by external force to swing, open, close and fire the nail bin. FIG. 2 is a schematic view of a cartridge assembly in motion. The cartridge assembly 100 is shown in an achievable form of motion driven by the hand-held assembly 200, including a swinging head motion, and pivoting about its own axis.

FIG. 3 is a schematic view of a partial structure of a powered surgical instrument according to a first embodiment of the present invention; FIG. 4 is a partial schematic view of a switching assembly according to a first embodiment of the present invention; fig. 5 is a disassembled schematic view of a switching assembly according to a first embodiment of the present invention. The hand-held assembly 200 includes: a drive assembly 2010, a switch assembly 2020, a first power take-off assembly 2030, a second power take-off assembly 2040, a manually rotatable portion 2050, a power supply assembly 2060, a control circuit 2070 and a housing portion 2080. Drive assembly 2010 includes a first motor 2011 having a drive shaft 20111 and a drive gear 2012. The drive gear is provided on the drive shaft 20111 to rotate with the drive shaft 20111. Drive assembly 2010 may also include a reduction gearbox 20112 and/or an encoder configured to cooperate with the first motor.

A switch assembly 2020 can be engaged with the drive assembly 2010, the switch assembly 2020 including a first gear assembly 2021, a second gear assembly 2022, a third gear assembly 2023, a shaft 2024, a switch fork 2025, a second motor 2026, and a drive rod 2027. The output switching section includes therein a switching fork 2025, a second motor 2026, and a drive lever 2027. The first, second, and

third gear assemblies

2021, 2022, 2023 are disposed on the shaft 2024 and are rotatable about the shaft 2024. The first gear assembly 2021 includes a first gear portion 20211, a first meshing portion 20212, and a second meshing portion 20213. The first gear portion 20211 is engaged with the driving gear 2012 of the driving assembly 2010 and receives a power input from the driving assembly 2010. The second gear assembly 2022 includes a second gear portion 20221 and a third meshing portion 20222; the third gear assembly 2023 includes a third gear portion 20231 and a fourth meshing portion 20232.

The first engagement portion 20212 of the first gear assembly 2021 is capable of intermeshing with the third engagement portion 20222 of the second gear assembly 2022 such that the first gear assembly 2021 and the second gear assembly 2022 are capable of synchronous rotation; the second engagement portion 20213 of the first gear assembly 2021 can be intermeshed with the fourth engagement portion 20232 of the third gear assembly 2023 such that the first gear assembly 2021 and the third gear assembly 2023 can be rotated in unison. The second motor 2026 is driven by pressing a switch located on the housing, the second motor 2026 drives a switch fork 2025 through a driving rod 2027, so that the first gear assembly 2021 can be switched between at least two positions, and when the switch fork 2025 pushes the first gear assembly 2021 to the first position, the first meshing portion 20212 of the first gear assembly 2021 and the third meshing portion 20222 of the second gear assembly 2022 are meshed with each other, so that the first gear assembly 2021 and the second gear assembly 2022 can rotate synchronously. When the first gear assembly 2021 is pushed to the second position by driving the switching fork 2025, the second engagement portion 20213 of the first gear assembly 2021 and the fourth engagement portion 20232 of the third gear assembly 2023 are engaged with each other, so that the first gear assembly 2021 and the third gear assembly 2023 can be rotated in synchronization.

Based on the above structure, the switching assembly 2020 enables power input obtained from the driving assembly 2010 to be switchably output to other assemblies through the second gear assembly 2022 and the third gear assembly 2023. The three gear assemblies, the first 2021, the second 2022 and the third 2023 gear assemblies, are coaxially aligned. Although a specific gear assembly gear portion diameter relationship is shown in fig. 1, this is not a limitation on the gear diameter relationship and the gear diameter relationship may be adjusted as appropriate depending on the gear ratio.

A first power output assembly 2030 including a first power gear 2031, a first rotary drive rod 2032, a first drive link 2033, and a first drive link assembly 2034; the first power gear 2031 is engageable with the second gear assembly 2022 of the switching assembly 2020. The first rotary driving rod 2032 and the first transmission 2033 are engaged with each other, so that the first rotary driving rod 2032 can drive the first transmission 2033 to move substantially linearly. The first transmission member 2033 is connected to the first transmission rod assembly 2034 to realize power transmission. The first transfer rod assembly 2034 may cooperate with the staple cartridge assembly 100 to effect control of the closure of the anvil and staple cartridge and the firing of the staples.

When the first gear assembly 2021 is pushed to the first position by driving the switching fork 2025 by the second motor 2026, the first engagement portion 20212 of the first gear assembly 2021 and the third engagement portion 20222 of the second gear assembly 2022 are engaged with each other, so that the first gear assembly 2021 and the second gear assembly 2022 can be rotated in synchronization. Since the second gear portion 20221 of the second gear assembly 2022 is in mesh with the first power gear 2031 of the first power output assembly 2030, power from the drive assembly 2010 is transmitted to the first power output assembly 2030. Power is transferred from the first transfer rod assembly 2034 of the first power output assembly 2030 to the cartridge assembly. Wherein the first rotary drive rod 2032 is rotatable. The first rotary drive rod 2032 may be an at least partially threaded lead screw or screw. The first transmission member 2033 is engaged with the screw or the thread of the screw rod.

The second power output assembly 2040 includes a second power gear 2041, a second rotation driving rod 2042, a second transmission element 2043 and a second transmission rod assembly 2044. The second power gear 2041 is engageable with a third gear assembly 2023 of the switch assembly 2020. The second rotating drive rod 2042 cooperates with the second transmission element 2043, such that the second rotating drive rod 2042 can drive the second transmission element 2043 to move substantially linearly. The second transmission element 2043 is fixedly connected to the second transmission rod assembly 2044. The second transmission rod assembly 2044 comprises a connecting claw 20441 and a sleeve 20442, the connecting claw 20441 is connected with the sleeve 20442, the sleeve 20442 can rotate and is connected with the connecting claw 20441, and the second transmission rod assembly 2044 further drives the cartridge assembly 100 by pushing and pulling the sleeve 20442 to transmit power in the forward direction or the backward direction, so as to control the swinging motion of the cartridge assembly 100. The second drive rod assembly 2044 is capable of partial rotation and maintains power output in the axial direction.

The second motor 2026 is driven by pressing a switch located on the housing, the second motor 2026 drives the switch fork 2025 through the driving rod 2027, so that when the first gear assembly 2021 is pushed to the second position, the first gear assembly 2021 and the third gear assembly 2023 are engaged with each other, the third gear portion 20231 of the third gear assembly 2023 is engaged with the second power gear 2041 of the second power output assembly 2040, and thus the power from the driving assembly 2010 is transmitted to the second power output assembly 2040. Power is transmitted from the second drive rod assembly 2044 of the second power output assembly 2040 to the cartridge assembly. Wherein the second rotary drive rod 2042 is rotatable. The second rotary drive rod 2042 may be an at least partially threaded lead screw or threaded rod. The second transmission member 2043 is engaged with the screw thread of the screw rod or the screw rod.

The drive shaft 20111 of the drive assembly 2010 is substantially parallel to the shaft 2024 of the switch 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 take-off 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 take-off assembly 2040.

The power supply module 2060 is used to supply electric power. The power supply assembly 2060 may include one or more batteries, which may be rechargeable or disposable.

A control circuit 2070, the control circuit 2070 comprising an input port through which an input signal is obtained and an output port through which an output signal is provided. A control circuit 2070 is connected to and controls the drive assembly 2010. The control circuit 2070 is also connected to the switching component 2020 and controls the switching component 2020.

The housing section 2080 can be used to house the drive assembly 2010, the switch assembly 2020, the power module 2060, and the control circuit 2070. And is capable of housing at least a portion of the first and second

power output assemblies

2030 and 2040.

The hand-held assembly 200 further includes a manual rotation portion 2050, the manual rotation portion 2050 being configured to control the rotation of the cartridge assembly 100 about the axial direction thereof. The manual rotation portion 2050 includes a rotation dial wheel 2051 and a connection rod 2052; the rotary dial wheel 2051 is rotatably connected with the housing portion 2080, the rotary dial wheel 2051 is fixedly connected with the connecting rod 2052, and the connecting rod 2052 is used for connecting the nail cartridge assembly 100. The rotary dial 2051 and the connecting rod 2052 of the manually rotatable portion 2050 have an inner space for accommodating at least a part of the first power output assembly 2030 and the second power output assembly 2040. The first transfer rod assembly 2034 of the first power take-off assembly 2030 may be located within the interior space. The rotatable transmission assembly 2045 of the second power output assembly 2040 and the third transmission rod 2044 may be located in the interior space. When the manual rotating part 2050 is rotated, the cartridge module 100 is driven to rotate around its own axis by the connecting rod 2052. The first drive rod assembly 2034 of the first power output assembly 2030 may extend into the interior space of the manually rotatable portion 2050 and the second drive rod assembly 2044 of the second power output assembly 2040 may extend into the interior space of the manually rotatable portion 2050.

Hand assembly 200 also includes a closure grip assembly 2090. The closing handle assembly 2090 includes a closing handle portion 2091 and a snap-fit portion 2092; the clamping part 2092 is clamped with the first transmission piece 2033 in a separable manner; so that when the snap-in portion 2092 is able to move the first transmission piece 2033 from the first position to the second position, and at the second position, the snap-in portion 2092 is separated from the first transmission piece 2033. The first transmission 2033 is configured to transmit power provided by the closure handle assembly 2090 and effect closure of the anvil and cartridge of the cartridge assembly 100.

Hand assembly 200 also includes a handle return button 2100, which handle return button 2100 is capable of holding closure handle assembly 2090 in a particular position, such as in a position where closure snap 2092 is separated from the first drive assembly.

The hand-held assembly 200 further comprises a head swing steering control button 2110, wherein the head swing 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, and the control circuit 2070 controls the driving assembly 2010 according to the first direction rotation control signal, the second direction rotation control signal or the reset control signal, so as to realize head swing steering or resetting of the nail cartridge assembly in the first direction or the second direction. The yaw control button 2110 may be a controller having one or more signal outputs for providing a variety of control signals.

The hand-held assembly 200 further includes a firing button assembly 2120; the firing button assembly 2120 is connected to the control circuit 2070 for providing signals to fire the cartridge module 100. When the firing button assembly 2120 is pressed, the firing button assembly 2120 provides a firing signal for a signal input port of the control circuit 2070, an output port of the control circuit 2070 outputs a signal to the driving assembly 2010 to drive the driving assembly to move, power is output outwards, and the power is transmitted to the nail bin assembly to drive a nail pushing sheet and a cutting knife therein, so that the nail bin assembly 100 is fired to cut and sew tissues. The firing button assembly 2120 may be disposed on the closed grip assembly or on the housing portion.

FIG. 6 is a partial schematic view of a powered surgical instrument according to a second embodiment of the present invention; fig. 7 is a partial schematic view of a switching assembly according to a second embodiment of the present invention. The switching assembly 2220 can be engaged with the driving assembly 2010, and the switching assembly 2220 comprises 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 screw 2227; the first gear assembly 2221 is positioned 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 coupled to each other, and are disposed on the shaft 2224. The first gear assembly 2221, the second gear assembly 2222, and the third gear assembly 2223 can be rotated simultaneously. The first gear assembly 2221 includes a first gear portion; the second gear assembly 2222 comprises a second gear portion; and the third gear assembly 2223 includes a third gear portion. The first gear assembly 2221 is engaged with the drive gear 2012 of the drive assembly 2010 and receives a power input from the drive assembly 2010. The first gear assembly 2221 may be switched between at least two positions by driving the switching fork 2225 by driving the second motor 2226. When the shift fork 2225 pushes the first gear assembly 2221 to the first position, the second gear assembly 2222 is in a meshed state with the first power gear portion 2031 of the first power output assembly 2030; the third gear assembly 2223 is separate from the second power take-off assembly 2040; enabling power from the drive assembly 2010 to be delivered to the first power take off assembly 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 part 2041 of the second power output assembly 2040, and the second gear assembly 2222 is separated from the first power output assembly 2030; enabling delivery of power from the drive assembly 2010 to the second power take-off assembly 2040.

Based on the above structure, the switching unit 2220 effects the input of power obtained from the driving unit 2010 to be switchably output to other units through the second gear unit 2222 and the third gear unit 2223. The three gear assemblies, the first gear assembly 2221, the second gear assembly 2222 and the third gear assembly 2223, are coaxially aligned.

FIG. 8 is a partial schematic view of a powered surgical instrument according to a third embodiment of the present invention; fig. 9 is a partial schematic view of a switching assembly according to a third embodiment of the present invention. The switching assembly 2320 can be engaged with the driving assembly 2010, and the switching assembly 2320 comprises 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 lead screw 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 fig. 8 only lists the second gear assembly 2322 located between the first gear assembly 2321 and the third gear assembly 2323; in practice, 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 disposed 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 with the second gear assembly 2322 through the connecting cylinder 2328. The first, second, and

third gear assemblies

2321, 2322, and 2323 can be rotated 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 engaged with the drive gear 2012 of the drive assembly 2010 and receives the power input from the drive assembly 2010. Toggling the shift fork 2325 may shift the first gear assembly 2321 in at least two positions. The first gear assembly 2321 can be pushed to the first position by driving the second motor 2326 to drive the switching fork 2325, and the second gear assembly 2322 is engaged with the first power gear portion 2031 of the first power output assembly 2030; the third gear assembly 2323 is separate from the second power take-off assembly 2040; enabling power from the drive assembly 2010 to be delivered to the first power take off assembly 2030. When the switching fork 2325 pushes the first gear assembly 2321 to the second position, the third gear assembly 2323 is engaged with the second power gear part 2041 of the second power output assembly 2040, and the second gear assembly 2322 is separated from the first power output assembly 2030; enabling delivery of power from the drive assembly 2010 to the second power take-off assembly 2040.

Based on the above structure, the switching assembly 2320 realizes that the power obtained from the driving assembly 2010 is output to other assemblies through the second gear assembly 2322 and the third gear assembly 2323 in a switchable manner. The three gear assemblies, the first gear assembly 2321, the second gear assembly 2322 and the third gear assembly 2323, are coaxially aligned.

In the operation process, a nail bin assembly of the anastomat with the nail bin is close to a tissue to be clamped (such as a lung or a stomach), and in the clamping process, the nail bin can rotate through the swinging head of the nail bin (at the moment, the switching

fork

2025, 2225 or 2325 is driven through the second motor, the switching

assembly

2020, 2220 or 2320 is kept in a state of being meshed with the second power output assembly, at the moment, the switching fork plays a safety role, and the nail bin assembly is prevented from being fired mistakenly in the operation process due to the fact that the switching fork is not meshed with the first power output assembly) and rotates around the shaft to select a proper clamping position. In which the head swinging motion is realized by driving the second power transmission means 2040 and the pivoting motion is realized by rotating the manual rotation part 2050. After approximation of the tissue, closure handle assembly 2090 is depressed, and closure handle assembly 2090 moves first link 2033 from an initial first position along first rotary drive rod 2032 to a second position, at which time closure handle assembly 2090 is separable from first link 2033 and handle reset button 2100 holds closure handle assembly 2090 in that position. Toggling the

shift fork

2025, 2225 or 2325 moves the

shift assembly

2020, 2220 or 2320 into engagement with the first power take-off assembly 2030. The firing button assembly 2120 is pressed to provide a firing signal to the control circuit, so that the driving assembly 2010 outputs power, the power is transmitted to the first power output assembly 2020, the cutting knife of the nail cartridge assembly 100 is driven to complete cutting, and simultaneously, the wound surface is sutured by the anastomosis nails. The drive assembly 2010 then provides a reverse drive force to retract the cutting blade. Releasing the handle reset button 2100 closes the handle reset, the first transmission 2033 retracts, the cartridge assembly 100 opens, and the clamped tissue is released. The stapler is withdrawn.

The handheld component of the electric surgical instrument provided by the invention realizes swinging, closing and firing of the nail bin component through the first motor. Can improve the operation efficiency and reduce the influence caused by manual operation. The stable cutting of cutting assembly and the effective sewing of anastomotic nail can be realized. Reduce postoperative bleeding and accelerate the recovery of patients. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, mode switching is realized through the second motor, an initial driving state can be set, and a safety structure for preventing mistaken triggering is formed. The electric surgical instrument provided by the invention can utilize the high-power motor to stably fire the nail bin assembly, so that the nail bin assembly can swing, close and fire; meanwhile, the switching of the driving modes is realized by using a low-power motor. The stable cutting and effective suturing of the tissue are realized, the operation efficiency is improved, and the influence caused by manual operation is reduced. Meanwhile, the complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, the initial driving state is set through the second motor, and a safety structure for preventing mistaken triggering is formed.

The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and various changes made within the scope of the independent claims of the present invention are within the scope of the present invention.

Claims

1. A powered surgical instrument hand-held assembly, the hand-held assembly comprising:

a power supply component;

a drive assembly including a drive gear and a first motor;

the switching assembly can be meshed with the driving assembly to obtain power input; the switching assembly comprises 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 is meshed with the driving gear of the driving assembly; the output switching part comprises a second motor, a transmission rod and a meshing piece; the output switching part can enable the switching component to be in a first output mode or a second output mode;

the first power output assembly comprises a first power gear, a first rotary driving rod, a first transmission piece and a first transmission rod assembly; the first power gear is fixedly connected with the first rotary driving rod, so that the first power gear and the first rotary driving rod can synchronously rotate; the first rotary driving rod is matched with the first transmission piece, so that the first rotary driving rod can drive the first transmission piece to move along the first rotary driving rod; the first transmission piece is connected with the first transmission rod;

the second power output assembly comprises a second power gear, a second rotary driving rod, a second transmission piece and a second transmission rod assembly; the second power gear is fixedly connected with the second rotary driving rod, so that the second power gear and the second rotary driving rod can synchronously rotate; the second rotary driving rod is matched with the second transmission piece, so that the second rotary driving rod can drive the second transmission piece to move along the second rotary driving rod; the second transmission piece is fixedly connected with the second transmission rod;

a control circuit connected to the drive component and the switching component; and

a housing portion;

wherein the second gear assembly of the switching assembly is engageable with the first power gear when the switching assembly is in a first output mode; the third gear assembly of the shift assembly is engageable with the second power gear when the shift assembly is in the second output mode.

2. The hand-held assembly of claim 1,

the first gear assembly of the switching assembly comprises a first gear, a first meshing part and a second meshing part; the first gear is meshed with a driving gear of the driving assembly; the second gear assembly comprises a second gear and a third meshing part; the third gear assembly comprises a third gear and a fourth meshing part;

in the first output mode, the first meshing portion of the first gear assembly and the third meshing portion of the second gear assembly are meshed with each other so that the first gear assembly and the second gear assembly can rotate synchronously; the second gear of the second gear assembly is meshed with the first power gear of the first power output assembly;

in the second output mode, the second meshing part of the first gear assembly and the fourth meshing part of the third gear assembly are meshed with each other, so that the first gear assembly and the third gear assembly can rotate synchronously; the third gear of the third gear assembly is meshed with the second power gear of the second power output assembly.

3. The hand-held assembly of claim 1,

the first gear assembly of the shifting assembly includes a first gear that meshes with a 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 with each other and can rotate simultaneously;

in the first output mode, the second gear is in mesh with a first power gear of the first power output assembly;

in the second output mode, the third gear is in mesh with a second power gear of the second power output assembly.

4. The hand-held assembly of claim 3,

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.

5. The hand held assembly according to any one of claims 1 to 4,

the handheld assembly further comprises a manual rotating part, and the manual rotating part comprises a rotating grab handle rotating thumb wheel and a connecting rod; the rotary grab handle rotary thumb wheel is connected with the shell in a rotatable manner; the rotary grab handle rotary dial wheel is fixedly connected with the connecting rod, and the connecting rod is used for connecting the nail bin assembly;

at least a part of the first transmission rod assembly of the first power output assembly is arranged in the inner space of the manual rotating part, and at least a part of the first transmission rod assembly can rotate along with the manual rotating dial wheel;

at least a portion of the second drive rod assembly of the second power take off assembly is disposed in an interior space of the manual rotating portion; at least a portion of the second drive rod assembly may rotate with the manually rotatable thumb wheel.

6. The hand held assembly according to any one of claims 1 to 5,

7. The hand-held assembly of claim 6,

8. The hand held assembly according to any one of claims 1 to 7,

9. The hand held assembly according to any one of claims 1 to 8,

10. A powered surgical instrument, wherein the powered surgical instrument is a powered stapler for linear cutting, the powered stapler comprising: a cartridge assembly and a hand held assembly according to any one of claims 1 to 9.