CN111345863A

CN111345863A - Electric surgical instrument

Info

Publication number: CN111345863A
Application number: CN201811584126.2A
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: 2018-12-24
Filing date: 2018-12-24
Publication date: 2020-06-30

Abstract

The present invention relates to powered surgical instruments. The powered surgical instrument includes: the cutting and sewing part comprises a nail anvil assembly and a nail storage assembly; and a hand-held portion, the hand-held portion including: a power supply component; a drive assembly including a drive gear and a first motor; a switching assembly including a shaft, an output switching part and a plurality of gear assemblies; the output switching part comprises a second motor, a transmission rod and a meshing piece; the output switching component can enable the switching component to be in a first output mode or a second output mode; a first power take-off assembly; a second power output assembly; a control circuit; and a housing portion. The handheld part of the electric surgical instrument provided by the invention realizes swinging, closing and firing of the nail bin assembly through the first motor. 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.

Description

Electric surgical instrument

Technical Field

The invention relates to a medical surgical operation instrument, in particular to an electric operation instrument.

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. For anorectal anastomat and tubular anastomat, although the percussion process is completed by pressing the handle at one time, the handle is pressed by the holding force of human hands, and the problem of uneven force application in the whole percussion process also exists. The final anastomotic nail forming effect is influenced by unstable and uneven manual percussion force application, so that the anastomotic nail forming has defects, and the cutting wound surface of the cutting knife is not smooth.

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.

Disclosure of Invention

The invention provides an electric surgical instrument which can realize tissue cutting and anastomotic nail firing in a motor-driven mode. The invention provides an electric surgical instrument which can stably fire anastomosis nails. The invention provides an electric surgical instrument which realizes the closing, firing and releasing of an anastomat through a motor. The invention provides an electric surgical instrument which can realize stable cutting and effective suturing of tissues. The invention provides an electric surgical instrument, which realizes automatic switching of cutting and suturing and output modes through two motors; because the power of the motor used for switching the output mode is smaller than that of the motor used for firing the electric anastomat, the manufacturing cost of the electric surgical instrument is saved.

The present invention provides an electric surgical instrument, characterized in that the electric surgical instrument comprises: the cutting and sewing part comprises a nail anvil assembly and a nail storage assembly; the nail anvil component comprises an annular nail abutting seat; the nail storage assembly comprises a nail storage assembly shell, an annular cutting knife, a nail pushing assembly and an annular nail bin; and a hand-held portion, the hand-held portion including: 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, an output switching part and a plurality of gear assemblies; the 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 component can enable the switching component to be in a first output mode or a second output mode; a first power take off assembly, one of the plurality of gear assemblies of the shift assembly being in mesh with a gear assembly of the first power take off assembly when the shift assembly is in a first output mode; a second power output assembly, one of the plurality of gear assemblies of the shift assembly being in mesh with a gear assembly of the second power output assembly when the shift assembly is in a second output mode; the second power output assembly is connected with the nail pushing assembly; the control circuit is connected with the driving assembly and the switching assembly and controls the driving assembly and the switching assembly; and a housing portion. 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, and 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 plurality of gear assemblies of the switch assembly include a first gear assembly, a second gear assembly, and a third gear assembly; the first gear 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 plurality of gear assemblies of the switch assembly include a first gear assembly, a second gear assembly, and a third gear assembly; the first gear 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 positioned on the same 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 first power output assembly comprises a first power gear, a first rotary driving rod and a first transmission piece; 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 rotary drive rod is preferably a screw rod or a threaded rod.

The second power output assembly comprises a second power gear, a second rotary driving rod and a second transmission piece; 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 rotary drive rod is preferably a screw rod or a threaded rod.

The electric surgical instrument further comprises a firing button assembly, and the firing button assembly is connected with the control circuit and used for providing a signal for controlling the driving assembly to move.

The electric surgical instrument further comprises a reset button, and the reset button is connected with the control circuit and used for providing a signal for controlling the movement of the driving assembly.

The electric surgical instrument further comprises a selector switch connected with the control circuit for providing a signal for controlling the movement of the switching assembly.

The powered surgical instrument of any of the preceding claims, wherein the powered surgical instrument is an anorectal stapler or a tubular stapler.

The invention provides an electric surgical instrument which can realize stable cutting and effective suturing of tissues. Reduce postoperative bleeding and accelerate the recovery of patients. The invention provides an electric surgical instrument which can realize closing, firing and releasing of an anastomat through a motor. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, a safety structure for preventing error triggering is formed by setting the initial driving state. The electric surgical instrument realizes automatic switching of cutting and suturing modes and output modes through the two motors; because the power of the motor used for switching the output mode is smaller than that of the motor used for firing the electric anastomat, the manufacturing cost of the electric surgical instrument is saved.

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 disassembled schematic view of the cutting and stapling portion of the powered surgical device in accordance with the first embodiment of the present invention;

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

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

FIG. 5 is a disassembled schematic view of a portion of the switch assembly according to the 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 schematic view of a powered surgical instrument switching assembly according to a second embodiment of the present 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 schematic view of a powered surgical instrument switching assembly according to a third embodiment of the present invention;

FIG. 10 is a schematic view of a powered surgical instrument according to a fourth embodiment of the present invention;

FIG. 11 is a schematic view of a cutting and stapling portion of a powered surgical instrument according to a fourth embodiment of the present invention;

FIG. 12 is a partial schematic view of a powered surgical instrument according to a fourth embodiment of the present invention;

FIG. 13 is a schematic view of a powered surgical instrument switching assembly in accordance with a fourth embodiment of the present invention;

fig. 14 is a disassembled schematic view of a portion of a switching assembly according to a fourth 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. Fig. 2 is a disassembled schematic view of a cutting and stapling portion of the powered surgical device according to the first embodiment of the present invention. For ease of understanding, the incised suture portion is shown in FIG. 1 as a unitary structure with the handle portion being substantially cut away to show its internal structure. The powered surgical instrument according to the first embodiment of the present invention is an anorectal powered stapler 100 comprising: cutting the suture 1100 and the handpiece 1200. The cutting suture 1100 can be used for clamping, cutting and suturing anorectal mucosal tissue, and the cutting suture 1100 comprises an anvil assembly 1110 and a staple storage assembly 1120. Anvil assembly 1110 includes an annular anvil seat 1111 and an anvil drive 1112. The staple storage assembly 1120 includes a staple storage assembly housing 1121, a staple pushing assembly 1122, and an annular staple cartridge 1123. Staples (not shown) are disposed within annular cartridge 1123. The anvil assembly 1110 is driven by the anvil driver 1112 to displace axially back and forth to clamp and release tissue. The magazine assembly 1120 also includes a circular cutting knife (not shown) disposed on the pusher assembly 1122.

The hand-held portion 1200 includes: drive assembly 1210, switch assembly 1220, first power output assembly 1230, second power output assembly 1240, power supply assembly 1250, control circuit 1260 and housing portion 1270. The power supply assembly 1250 provides electrical power to the entire powered surgical instrument, including a battery, which may be a disposable battery or a rechargeable battery. The battery may be fixed in the hand-held portion 1200 or may be detachably provided in the hand-held portion 1200. A drive assembly 1210 including a drive gear 1212 and a first motor 1211; and may also include a reduction gearbox and/or encoder for use with the motor.

The control circuit 1260 includes circuit boards and circuit elements. The control circuit 1260 includes an input port through which an input signal is obtained and an output port through which an output signal is provided. A control circuit 1260 is coupled to the drive assembly 1210 and controls the drive assembly 1210. The control circuit 1260 is connected to the switching component 1220 and controls the switching component 1220.

The housing portion 1270 can house the drive assembly 1210, the switching assembly 1220, the power supply assembly 1250, and the control circuit 1260. And is capable of receiving at least a portion of the first 1230 and second 1240 power-take-off assemblies.

The hand-held portion 1200 also includes a firing button assembly 1280; the firing button assembly 1280 is connected to the control circuit 1260 and is configured to provide a driving signal for driving the anorectal electric stapler 100. The handheld portion 1200 further includes a switch 1285, wherein the switch 1285 is connected to the control circuit 1260 and used for providing a driving signal for driving the switching component 1220.

When the firing button assembly 1280 is pressed, the firing button assembly 1280 provides an anvil staple cartridge closing signal or a firing signal to the signal input port of the control circuit 1260, the output port of the control circuit 1260 outputs a signal to the driving assembly 1210, the driving assembly 1210 outputs power outwards, and the power is transmitted to the cutting and suturing part 1100. In the first output mode, the firing button assembly 1280 outputs an anvil cartridge closing signal through the control circuit 1260, and the power output by the driving assembly 1210 is transmitted to the first power output portion 1230 and further transmitted to the anvil driving member 1112, so as to pull the anvil assembly 1110 and clamp the tissue to be cut between the anvil assembly 1110 and the staple storage assembly 1120. Then, the switch 1285 is toggled to drive the switch 1220 through the control circuit 1260 to change the output mode to the second output mode. Then, the firing button assembly 1280 outputs a firing signal through the control circuit, the power output by the driving assembly 1210 is transmitted to the second power output portion 1240 and further transmitted to the staple pushing assembly 1122, and the staple pushing assembly 1122 drives the cutting knife and the staple pushing piece and drives the staples in the annular staple cartridge 1123, so as to achieve the firing of the cutting and suturing portion 1100 and complete the cutting and suturing of the tissue. The firing button assembly 1280 can be disposed on the housing portion 1270.

The handpiece 1200 also includes a reset button 1290. After the cutting and stapling of the tissue is completed, the switch 1285 is toggled to actuate the switch assembly 1220 via the control circuit 1260 to switch the output mode back to the first output mode. Reset button 1290 then provides a drive signal to control drive assembly 1210 via control circuit 1260. Power from drive assembly 1210 is again transferred to anvil driver 1112 to move anvil assembly 1110 away from staple storage assembly 1120 to effect release of the stapled tissue.

FIG. 3 is a partial schematic view of a powered surgical instrument according to a first embodiment of the present invention; FIG. 4 is a schematic view of a powered surgical instrument switching assembly according to a first embodiment of the present invention; fig. 5 is a disassembled schematic view of a portion of a switching assembly according to a first embodiment of the present invention. A drive assembly 1210 including a first motor 1211 and a drive gear 1212, the drive assembly 1210 having a drive shaft 12111. The drive gear is provided on the drive shaft 12111 for rotation with the drive shaft 12111. Drive assembly 1210 may also include a reduction gearbox and/or an encoder configured with the first motor.

A shift assembly 1220 is engageable with the drive assembly 1210, the shift assembly 1220 including a first gear assembly 1221, a second gear assembly 1222, a third gear assembly 1223, a shaft 1224, and an output switch. The output switching unit includes: a shift fork 1225, a second motor 1226, and a drive rod 1227. The first gear assembly 1221, the second gear assembly 1222, and the third gear assembly 1223 are disposed on the shaft 1224 and are rotatable about the shaft 1224. The first gear assembly 1221 includes a first gear portion 12211, a first gear engagement portion 12212, and a second gear engagement portion 12213. The first gear portion 12211 is engaged with the driving gear 1212 of the driving assembly 1210, and receives a power input of the driving assembly 1210. The second gear assembly 1222 includes a second gear part 12221 and a third engagement part 12222; the third gear assembly 1223 includes a third gear portion 12231 and a fourth gear engagement portion 12232. The engaging portion may be a gear engaging portion or a spline engaging portion.

The first engagement portion 12212 of the first gear assembly 1221 is capable of intermeshing with the third engagement portion 12222 of the second gear assembly 1222 such that the first gear assembly 1221 and the second gear assembly 1222 are capable of synchronous rotation; the second engagement portion 12213 of the first gear assembly 1221 can be engaged with the fourth engagement portion 12232 of the third gear assembly 1223 such that the first gear assembly 1221 and the third gear assembly 1223 can be rotated in synchronization. The first gear assembly 1221 is switched between at least two positions by toggling a switch 1285 provided on the housing, driving a second motor 1226 through a control circuit 1260, and driving a switching fork 1225 through a driving rod 1227 by the second motor 1226, and when the switching fork 1225 pushes the first gear assembly 1221 to a first position, a first engagement portion 12212 of the first gear assembly 1221 is engaged with a third engagement portion 12222 of the second gear assembly 1222, so that the first gear assembly 1221 and the second gear assembly 1222 can be rotated in synchronization. When the shift fork 1225 pushes the first gear assembly 1221 to the second position, the second engagement portion 12213 of the first gear assembly 1221 and the fourth engagement portion 12232 of the third gear assembly 1223 are engaged with each other, so that the first gear assembly 1221 and the third gear assembly 1223 can be rotated in synchronization.

Based on the above structure, the switching assembly 1220 enables the power input obtained from the driving assembly 1210 to be switchably output to other assemblies through the second gear assembly 1222 and the third gear assembly 1223. The three gear assemblies, the first gear assembly 1221, the second gear assembly 1222, and the third gear assembly 1223, 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 1230 including a first power gear 1231, a first rotary drive shaft 1232, and a first transmission 1233; the first power gear 1231 is engageable with the second gear assembly 1222 of the switching assembly 1220. The first rotation driving rod 1232 is mutually matched with the first transmission member 1233, so that the first rotation driving rod 1232 can drive the first transmission member 1233 to move basically in a straight line. The first transmission member 1233 can be connected to the anvil driving member 1112 to transmit power. The anvil driver 1112 controls the closing and opening of the anvil assembly 1110 and the staple storage assembly 1120 by driving the anvil assembly 1120.

When the first gear assembly 1221 is pushed to the first position by driving the switching fork 1225 by the second motor 1226, the first engagement portion 12212 of the first gear assembly 1221 and the third engagement portion 12222 of the second gear assembly 1222 are engaged with each other, so that the first gear assembly 1221 and the second gear assembly 1222 can be rotated in synchronization. Since the second gear portion 12221 of the second gear assembly 1222 is in mesh with the first power gear 1231 of the first power output assembly 1230, power from the driving assembly 1210 is transmitted to the first power output assembly 1230. Wherein the first rotation driving rod 1232 is rotatable. The first rotational drive rod 1232 may be an at least partially threaded lead screw or screw. The first transmission member 1233 is engaged with the thread of the screw rod or the screw rod. The first transmission member 1233 may have a pin, and the pin moves along the screw rod or the screw thread of the screw rod, so that the first transmission member 1233 generates a linear motion. As shown in fig. 3, the thread of the shift screw includes a first region and a second region, the first region being closer to the first power gear 1231 than the second region. The pitch of the first region is greater than the pitch of the second region. Thereby providing for rapid closure of the anvil staple cartridge at the beginning of closure, as well as pressure closure at the end of closure.

A second power take off assembly 1240 comprising a second power gear 1241, a second rotary drive shaft 1242 and a second transfer member 1243. The second power gear 1241 is engageable with a third gear assembly 1223 of the switch assembly 1220. The second rotary driving rod 1242 and the second transmission member 1243 are mutually matched, so that the second rotary driving rod 1242 can drive the second transmission member 1243 to move substantially linearly. The second transmission member 1243 may be connected to the staple pushing assembly 1122 via a staple pushing driving rod 1244 to implement power transmission and complete the firing of the cutting knife and the staples.

When the switch 1285 located at the housing is toggled to drive the second motor 1226, the second motor 1226 drives the switch fork 1225 through the driving rod 1227, so that the first gear assembly 1221 and the third gear assembly 1223 are engaged with each other when the first gear assembly 1221 is pushed to the second position, the third gear portion 12231 of the third gear assembly 1223 is engaged with the second power gear 1241 of the second power output assembly 1240, and thus the power from the driving assembly 1210 is transmitted to the second power output assembly 1240. Power is transmitted from the second power output assembly 1240 to the staple pushing assembly 1122 of the cutting suture 1100. Wherein the second rotation drive rod 1242 is rotatable. The second rotary drive rod 1242 may be an at least partially threaded lead screw or screw. The second transmission member 1243 is engaged with the screw thread of the screw rod or the screw rod. The second transmission member 1243 may be provided with a pin, and the pin moves along the screw rod or the screw thread to make the second transmission member 1243 move linearly.

The drive shaft 12111 of the drive assembly 1210 is substantially parallel to the shaft 1224 of the switch assembly 1220. Further, the drive shaft 12111 of the drive assembly 1210 is substantially parallel to the first rotary drive shaft 1232 of the first power take off assembly 1230. Further, the drive shaft 12111 of the drive assembly 1210 is substantially parallel to the second rotary drive rod 1242 of the second power output assembly 1240.

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 schematic view of a powered surgical instrument switching assembly according to a second embodiment of the present invention. The switching member 2220 can be engaged with the driving member 2210, and the switching member 2220 includes a first gear assembly 2221, a second gear assembly 2222, a third gear assembly 2223, a shaft 2224, and an output switching part. The output switching unit includes: 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 in meshing engagement with the drive gear 2212 of the drive assembly 2210, receiving a power input from the drive assembly 2210. The first gear assembly 2221 can be switched between at least two positions by turning a switch (refer to fig. 1) and driving a switching fork 2225 by driving a second motor 2226 through a control circuit (refer to fig. 1). 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 part 2231 of the first power output assembly 2230; the third gear assembly 2223 is separate from the second power take-off assembly 2240; enabling power from drive assembly 2210 to be delivered to the first power take-off assembly 2230. When the shift 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 2241 of the second power output assembly 2240, and the second gear assembly 2222 and the first power output assembly 2230 are separated from each other; enabling delivery of power from drive assembly 2210 to the second power take-off assembly 2240.

Based on the above structure, the switching assembly 2220 effects the input of power obtained from the driving assembly 2210 to be switchably output to other assemblies through the second gear assembly 2222 and the third gear assembly 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 schematic view of a powered surgical instrument switching assembly according to a third embodiment of the present invention. The switching assembly 3220 is capable of engaging with the driving assembly 3210, and the switching assembly 3220 includes a first gear assembly 3221, a second gear assembly 3222, a third gear assembly 3223, a shaft 3224, and an output switching portion. The output switching unit includes: a switch fork 3225, a second motor 3226, and a lead screw 3227. The second gear assembly 3222 and the third gear assembly 3223 are located on the same side of the first gear assembly 3221, although fig. 8 only lists the second gear assembly 3222 located between the first gear assembly 3221 and the third gear assembly 3223; in practice, the third gear assembly 3223 may also be located between the first gear assembly 3221 and the second gear assembly 3222. The first gear assembly 3221, the second gear assembly 3222 and the third gear assembly 3223 are connected to one another and are disposed on the shaft 3224; the second gear assembly 3222 and the third gear assembly 3223 may be fixedly coupled directly, and the first gear assembly may be coupled to the second gear assembly 3222 via the connecting cylinder 3229. The first, second and

third gear assemblies

3221, 3222, 3223 are capable of simultaneous rotation. The first gear assembly 3221 includes a first gear portion; the second gear assembly 3222 includes a second gear portion; and the third gear assembly 3223 includes a third gear portion. The first gear assembly 3221 is engaged with the driving gear 3212 of the driving assembly 3210 to receive power input from the driving assembly 3210. The first gear assembly 3221 may be switched between at least two positions by toggling a switch (refer to a switch 1285 in fig. 1) to drive the switching fork 3225 by driving the second motor 3226 through a control circuit (refer to a control 1260 in fig. 1). The first gear assembly 3221 may be pushed to the first position by driving the switching fork 3225 by driving the second motor 3226, and the second gear assembly 3222 is engaged with the first power gear portion 3231 of the first power output assembly 3230; the third gear assembly 3223 is separate from the second power take-off assembly 3240; enabling power from the drive assembly 3210 to be delivered to the first power take-off assembly 3230. When the switching fork 3225 pushes the first gear assembly 3221 to the second position, the third gear assembly 3223 is engaged with the second power gear portion 3241 of the second power output assembly 3240, and the second gear assembly 3222 is separated from the first power output assembly 3230; enabling power from the drive assembly 3210 to be delivered to the second power take-off assembly 3240.

Based on the above structure, the switching assembly 3220 realizes the power input obtained from the driving assembly 3210 to be switchably output to other assemblies through the second gear assembly 3222 and the third gear assembly 3223. Three gear assemblies, first gear assembly 3221, second gear assembly 3222, and third gear assembly 3223, are coaxially aligned.

In the operation process, the hemorrhoid tissue to be excised is placed in a cavity inside the nail storage component of the anorectal electric anastomat. The switching shifting fork keeps the switching assembly in a state meshed with the first power output assembly, plays a role in safety at the moment, and prevents the cutting and sewing part from being triggered by mistake in the operation process because the switching shifting fork is not meshed with the second power output assembly. The firing button component is pressed to provide a closing signal for the control circuit, so that the driving component outputs power, the nail anvil component moves towards the direction close to the nail storage component, and the hemorrhoid tissue to be excised is clamped. The change-over switch positioned on the shell is toggled, the second motor of the switching assembly is driven by the control circuit, the second motor drives the switching shifting fork through the driving rod, and the switching assembly is moved to a position meshed with the second power output assembly. The trigger button assembly is pressed to provide a trigger signal for the control circuit, so that the driving assembly outputs power, the power is transmitted to the second power output assembly, the cutting knife of the nail pushing assembly is driven to complete cutting, and simultaneously, the anastomotic nails sew the wound surface. After keeping a specific time, the control circuit enables the motor of the driving assembly to move reversely to provide reverse driving force, and the cutting knife and the nail pushing assembly are retracted. The second motor is driven by toggling a change-over switch positioned on the shell, the second motor drives a change-over shifting fork through a driving rod, and the change-over component is arranged at a position meshed with the first power output component. The reset button is pressed to provide a reset signal to the control circuit, so that the driving component provides reverse driving force, the nail anvil component moves towards the direction far away from the nail storage component, the cutting and suturing part is opened, and the clamped tissue is released. The stapler is withdrawn.

FIG. 10 is a schematic view of a powered surgical instrument according to a fourth embodiment of the present invention; fig. 11 is a schematic view of a cutting and stapling portion of a powered surgical instrument according to a fourth embodiment of the present invention. The powered surgical instrument according to the fourth embodiment of the present invention is a tubular powered stapler 400 including: the cutting suture 4100 and the handpiece 4200. The cutting and suturing part 4100 can clamp, cut and suture the severed digestive tract tissue, and can connect the severed digestive tract tissue. The cutting stapling portion 4100 includes an anvil assembly 4110 and a magazine assembly 4120. The anvil assembly 4110 comprises an annular anvil seat 4111 and an anvil rod 4112. The staple storage assembly 4120 includes a staple storage assembly housing 4121, a staple pushing assembly (not shown), an annular staple cartridge 4123, an anvil drive member 4124 and an annular cutting knife 4125. Staples (not shown) are disposed within the annular cartridge 4123. The anvil driving component 4124 is detachably connected with the anvil assembly, and the anvil driving component 4124 drives the anvil assembly 4110 to axially displace back and forth, so as to clamp and release tissue.

The hand 4200 includes: the drive assembly 4210, the switching assembly 4220, the first power output assembly 4230, the second power output assembly 4240, the power supply assembly 4250, the control circuit 4260 and the housing portion 4270. The power supply 4250 provides electrical power to the entire powered surgical instrument, including batteries, which may be disposable or rechargeable. The battery may be fixed in the handle 4200, or may be detachably provided in the handle 4200. A drive assembly 4210 comprising a drive gear 4212 and a motor 4211; and may also include a reduction gearbox and/or encoder for use with the motor.

The control circuit 4260 includes a circuit board and circuit elements. The control circuit 4260 includes an input port through which an input signal is obtained and an output port through which an output signal is provided. The control circuit 4260 is connected to the drive unit 4210 and controls the drive unit 4210.

The housing portion 4270 can house the drive assembly 4210, the switching assembly 4220, the power supply assembly 4250, and the control circuit 4260. And is configured to house at least a portion of the first and second

power output assemblies

4230, 4240.

The hand 4200 further includes a firing button assembly 4280; the firing button assembly 4280 is coupled to the control circuit 4260 for providing a drive signal for driving the tubular electric stapler 400. When the firing button assembly 4280 is pressed, the firing button assembly 4280 provides an anvil and staple cartridge closing signal or a firing signal to a signal input port of the control circuit 4260, an output port of the control circuit 4260 outputs a driving signal to the driving assembly 4210, the driving assembly 4210 outputs power outwards, and the power is transmitted to the cutting and suturing part 4100. In the first output mode, the firing button assembly 4280 outputs an anvil cartridge closing signal through the control circuit 4260, and the power output by the driving assembly 4210 is transmitted to the first power output portion 4230 and further transmitted to the anvil driving member 4124, so as to pull the anvil assembly 4110 and clamp the digestive tract tissue between the anvil assembly 4110 and the staple storage assembly 4120. The output mode is changed into the second output mode by toggling a switch 4285 located on the housing to drive a second motor 4226, and the second motor 4226 drives a switch fork 4225 through a driving rod 4227. At this time, the firing button assembly 4280 outputs a firing signal through the control circuit, the power output by the driving assembly 4210 is transmitted to the second power output portion 4240 and further transmitted to the nail pushing assembly 4122, the nail pushing assembly 4122 drives the cutting knife and the nail pushing sheet and drives the anastomotic nails in the annular nail bin 4123, so that the cutting and suturing portion 4100 is fired, and the cutting and suturing of the tissue are completed. The firing button assembly 4280 may be disposed on the housing portion 4270.

The handpiece 4200 also includes a reset button 4290. After the cutting and stapling of tissue is completed, the switch assembly 4220 is configured to switch the output mode back to the first output mode, and the reset knob 4290 provides a drive signal via the control circuit 4260 to control the drive assembly 4210. The power output by the drive assembly 4210 is again transmitted to the anvil driver 4124 to move the anvil assembly 4110 away from the staple storage assembly 4120 to effect release of the stapled tissue.

FIG. 12 is a partial schematic view of a powered surgical instrument according to a fourth embodiment of the present invention; FIG. 13 is a schematic view of a powered surgical instrument switching assembly in accordance with a fourth embodiment of the present invention; fig. 14 is a disassembled schematic view of a portion of a switching assembly according to a fourth embodiment of the present invention.

A drive assembly 4210 comprising a first electric motor 4211 and a drive gear 4212, the drive assembly 4210 having a drive shaft 42111. The drive gear is disposed on the drive shaft 42111 for rotation with the drive shaft 42111. The drive assembly 4210 may also include a reduction gear box and/or an encoder configured with the first motor.

The switching assembly 4220 is engageable with the driving assembly 4210, and the switching assembly 4220 includes a first gear assembly 4221, a second gear assembly 4222, a third gear assembly 4223, a shaft 4224, and an output switching portion. The output switching unit includes: a shift fork 4225, a second motor 4226 and a drive rod 4227. The first, second and

third gear assemblies

4221, 4222, 4223 are disposed on the shaft 4224 and are rotatable about the shaft 4224. The first gear assembly 4221 includes a first gear portion 42211, a first meshing portion 42212, and a second meshing portion 42213. The first gear portion 42211 is engaged with a drive gear 4212 of the drive assembly 4210 and receives power input of the drive assembly 4210. The second gear assembly 4222 comprises a second gear portion 42221 and a third meshing portion 42222; the third gear assembly 4223 includes a third gear portion 42231 and a fourth gear engagement portion 42232. The engaging portion may be a gear engaging portion or a spline engaging portion.

The first engagement portion 42212 of the first gear assembly 4221 is capable of intermeshing with the third engagement portion 42222 of the second gear assembly 4222 such that the first gear assembly 4221 and the second gear assembly 4222 are capable of synchronous rotation; the second engagement portion 42213 of the first gear assembly 4221 can be engaged with the fourth engagement portion 42232 of the third gear assembly 4223, so that the first gear assembly 4221 and the third gear assembly 4223 can be rotated in synchronization. When the switch 4285 at the housing is turned, the second motor 4226 is driven by the control circuit 4260, the second motor 4226 drives the switching fork 4225 through the driving rod 4227, the first gear assembly 4221 can be switched between at least two positions, and when the switching fork 4225 pushes the first gear assembly 4221 to the first position, the first meshing part 42212 of the first gear assembly 4221 and the third meshing part 42222 of the second gear assembly 4222 are meshed with each other, so that the first gear assembly 4221 and the second gear assembly 4222 can be synchronously rotated. When the shift fork 4225 pushes the first gear assembly 4221 to the second position, the second engagement portion 42213 of the first gear assembly 4221 and the fourth engagement portion 42232 of the third gear assembly 4223 are engaged with each other, so that the first gear assembly 4221 and the third gear assembly 4223 can be synchronously rotated.

Based on the above structure, the switching assembly 4220 realizes the input of power obtained from the driving assembly 4210 to be switchably output to other assemblies through the second gear assembly 4222 and the third gear assembly 4223. The three gear assemblies, the first gear assembly 4221, the second gear assembly 4222 and the third gear assembly 4223, are coaxially aligned. Although a specific gear assembly gear portion diameter relationship is shown in fig. 10, 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 4230 comprising a first power gear 4231, a first rotary drive rod 4232 and a first transmission 4233; the first power gear 4231 is engageable with the second gear assembly 4222 of the shift assembly 4220. The first rotary drive rod 4232 is engaged with the first transmission member 4233, such that the first rotary drive rod 4232 can drive the first transmission member 4233 to move substantially linearly. The first transmission member 4233 can be connected with the anvil driving member 4124 to realize the transmission of power. The anvil driver 4124 controls the closing and opening of the anvil assembly 4110 and the staple storage assembly 4120 by driving the anvil assembly 4120.

When the first gear assembly 4221 is pushed to the first position by driving the switching fork 4225 by the second motor 4226, the first engagement portion 42212 of the first gear assembly 4221 and the third engagement portion 42222 of the second gear assembly 4222 are engaged with each other, so that the first gear assembly 4221 and the second gear assembly 4222 can be rotated in synchronization. Since the second gear portion 42221 of the second gear assembly 4222 is in a meshed state with the first power gear 4231 of the first power output assembly 4230, power from the drive assembly 4210 is transmitted to the first power output assembly 4230. Wherein the first rotation drive rod 4232 is rotatable. The first rotation drive rod 4232 may be an at least partially threaded lead screw or screw. The first transmission member 4233 is engaged with the screw thread of the screw rod or the screw rod. The first transmission member 4233 may be provided with a pin which moves along the screw thread of the screw rod or the screw rod to generate a linear motion of the first transmission member 4233. As shown in fig. 12, the thread of the shift screw includes a first region and a second region, the first region being closer to the first power gear 4231 than the second region. The pitch of the first region is greater than the pitch of the second region. Thereby providing for rapid closure of the anvil staple cartridge at the beginning of closure, as well as pressure closure at the end of closure.

A second power take-off assembly 4240 comprising a second power gear 4241, a second rotary drive rod 4242 and a second transmission member 4243. The second power gear 4241 is engageable with the third gear assembly 4223 of the switching assembly 4220. The second rotary drive rod 4242 cooperates with the second transmission member 4243 such that the second rotary drive rod 4242 can drive the second transmission member 4243 in a substantially linear motion. The second transmission member 4243 may be connected with the staple pushing assembly 4122 through a staple pushing driving rod 4244 to achieve power transmission and complete the firing of the cutting knife and the staples.

When the switch 4285 at the housing is toggled to drive the second motor 4226, the second motor 4226 drives the switch fork 4225 through the driving rod 4227, so that the first gear assembly 4221 and the third gear assembly 4223 are engaged with each other, the third gear portion 42231 of the third gear assembly 4223 and the second power gear 4241 of the second power output assembly 4240 are in an engaged state, and thus the power from the driving assembly 4210 is transmitted to the second power output assembly 4240. Power is transmitted from the second power output assembly 4240 to the staple pushing assembly 4122 of the cutting staple 4100. Wherein the second rotation drive rod 4242 is rotatable. The second rotation drive rod 4242 may be an at least partially threaded lead screw or screw. The second transmission member 4243 is engaged with the screw thread of the screw rod or the screw rod. The second transmission member 4243 may be provided with a pin which moves along the screw thread of the screw rod or the screw rod to generate a linear movement of the second transmission member 4243.

The drive shaft 42111 of the drive assembly 4210 is substantially parallel to the shaft 4224 of the shift assembly 4220. Further, the drive shaft 42111 of the drive assembly 4210 is substantially parallel to the first rotary drive rod 4232 of the first power output assembly 4230. Further, the drive shaft 42111 of the drive assembly 4210 assembly is substantially parallel to the second rotary drive rod 4242 of the second power output assembly 4240.

As shown in the drawing, the switching unit 4220 in the fourth embodiment has the same structure as the switching unit 1220 in the first embodiment.

During the operation, the digestive tract tissue (intestine or stomach) to be connected is placed in the cavity inside the tubular electric anastomat staple storage assembly. The switching shifting fork keeps the switching assembly in a state meshed with the first power output assembly, plays a role in safety at the moment, and prevents the cutting and sewing part from being triggered by mistake in the operation process because the switching shifting fork is not meshed with the second power output assembly. The firing button component is pressed to provide a closing signal for the control circuit, so that the driving component outputs power, the nail anvil component moves towards the direction close to the nail storage component, and the alimentary canal tissue to be cut is clamped. Then, a change-over switch is shifted, a change-over shifting fork is driven by a control circuit, and the change-over component is moved to a position meshed with the second power output component. The trigger button assembly is pressed to provide a trigger signal for the control circuit, so that the driving assembly outputs power, the power is transmitted to the second power output assembly, the cutting knife of the nail pushing assembly is driven to complete cutting, and simultaneously, the anastomotic nails sew the wound surface. After keeping a specific time, the control circuit enables the motor of the driving assembly to move reversely to provide reverse driving force, and the cutting knife and the nail pushing assembly are retracted. And the change-over switch is shifted, the change-over shifting fork is driven by the control circuit, and the change-over component is arranged to be meshed with the first power output component. The reset button is pressed to provide a reset signal to the control circuit, so that the driving component provides reverse driving force, the nail anvil component moves towards the direction far away from the nail storage component, the cutting and suturing part is opened, and the clamped tissue is released. The stapler is withdrawn.

Both the tubular anastomat and the anorectal anastomat need to drive the nail anvil assembly to complete the closing of the nail anvil and nail bin, so that the clamping of tissues is realized; both of which in turn require the staple pushing assembly and the cutting blade to be driven to complete the cutting of the tissue. The motion processes of the nail anvil and the nail pushing component are mutually independent, and the nail anvil and the nail pushing component need to be driven by two relatively independent driving or transmission structures. Since the switching assembly 4220 in the fourth embodiment has the same structure as the switching assembly 1220 in the first embodiment, the switching

structures

2220, 3220 in the second and third embodiments of the present invention can be used for the electric tubular anastomat as well.

The handheld part of the electric surgical instrument provided by the invention realizes the closing and firing of the nail bin assembly 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 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, characterized in that the powered surgical instrument comprises:

the cutting and sewing part comprises a nail anvil assembly and a nail storage assembly; the nail anvil component comprises an annular nail abutting seat; the nail storage assembly comprises a nail storage assembly shell, an annular cutting knife, a nail pushing assembly and an annular nail bin; and

a hand-held portion, the hand-held portion 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, an output switching part and a plurality of gear assemblies; the 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 component can enable the switching component to be in a first output mode or a second output mode;

a first power take off assembly, one of the plurality of gear assemblies of the shift assembly being in mesh with a gear assembly of the first power take off assembly when the shift assembly is in a first output mode;

a second power output assembly, one of the plurality of gear assemblies of the shift assembly being in mesh with a gear assembly of the second power output assembly when the shift assembly is in a second output mode; the second power output assembly is connected with the nail pushing assembly;

the control circuit is connected with the driving assembly and the switching assembly and controls the driving assembly and the switching assembly; and

a housing portion.

2. The powered surgical instrument of claim 1,

the plurality of gear assemblies of the switch assembly include a first gear assembly, a second gear assembly, and a third gear assembly; the first gear 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 powered surgical instrument of claim 1,

the plurality of gear assemblies of the switch assembly include a first gear assembly, a second gear assembly, and a third gear assembly; the first gear 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 powered surgical instrument of claim 3, wherein the first gear assembly is located between the second gear assembly and the third gear assembly; or the first gear assembly is positioned on the same side of the second gear assembly and the third gear assembly.

5. The powered surgical instrument of any of claims 1-4, wherein the first power output assembly includes a first power gear, a first rotary drive rod, and a first transmission member; 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 rotary drive rod is preferably a screw rod or a threaded rod.

6. The powered surgical instrument of any of claims 1-5, wherein the second power take off assembly includes a second power gear, a second rotary drive shaft, and a second transmission; 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 rotary drive rod is preferably a screw rod or a threaded rod.

7. The powered surgical instrument of claims 1-6, further comprising a firing button assembly coupled to the control circuit for providing a signal to control movement of the drive assembly.

8. The powered surgical instrument of any one of claims 1-7, further comprising a reset button coupled to the control circuit for providing a signal to control movement of the drive assembly.

9. The powered surgical instrument of any one of claims 1-8, further comprising a switch coupled to the control circuit for providing a signal to control movement of the switching assembly.

10. The powered surgical instrument of any of claims 1-9, wherein the powered surgical instrument is an anorectal stapler or a tubular stapler.