Disclosure of Invention
The invention provides an electric surgical instrument which can realize tissue cutting and anastomotic nail firing in a motor driving mode. The invention provides an electric surgical instrument which can stably fire anastomat. 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 suture and output modes through two motors, and saves the manufacturing cost of the electric surgical instrument because the power of the motor used for switching the output modes is smaller than that of the motor used for firing an electric anastomat.
The invention provides an electric surgical instrument which is characterized by comprising a cutting suture part, a nail anvil assembly, a nail storage assembly, a handheld part, a driving assembly, a switching assembly, a control circuit and a control circuit, wherein the cutting suture part comprises a nail anvil assembly and a nail storage assembly, the nail anvil assembly comprises a nail storage assembly shell, a ring cutter, a nail pushing assembly and a ring nail bin, the nail storage assembly comprises a nail storage assembly, the driving assembly comprises a driving 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 assemblies are 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 switching assembly can enable the switching assembly to be in a first output mode or a second output mode, a first power output assembly is arranged when the switching assembly is in the first output mode, one of the plurality of gear assemblies is meshed with the first power output assembly, the switching assembly is meshed with the second power output assembly, the second power output assembly is connected with the driving circuit, and the driving assembly is meshed with the driving circuit. 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, so that the power output path is selected. Meanwhile, for the switching of the alternative, the switching component forms a structure similar to a safety, and other transmission structures are prevented from being triggered by mistake.
The plurality of gear assemblies of the switching assembly include a first gear assembly, a second gear assembly and a third gear assembly, the first gear assembly includes a first gear, a first meshing portion and a second meshing portion, the first gear is meshed with a driving gear of the driving assembly, the second gear assembly includes a second gear and a third meshing portion, the third gear assembly includes a third gear and a fourth meshing portion, in the first output mode, the first meshing portion of the first gear assembly 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 and the first power gear of the first power output assembly are meshed with each other, in the second output mode, the second meshing portion of the first gear assembly and the fourth meshing portion of the third gear assembly are meshed with each other so that the first gear assembly and the third gear assembly can rotate synchronously, and the third gear assembly are meshed with the second power output. After the first gear assembly is meshed with the second gear assembly or the third gear assembly, 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 switching assembly comprise a first gear assembly, a second gear assembly and a third gear assembly, the first gear assembly comprises a first gear which is meshed with a driving gear of the driving assembly, the second gear assembly comprises a second gear, the third gear assembly comprises 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 meshed with a first power gear of the first power output assembly, and in the second output mode, the third gear is meshed with a second power gear of the second power output assembly. Different structures are provided for directly outputting power 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 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 the different side 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 part, wherein 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 part, so that the first rotary driving rod can drive the first transmission part to move along the first rotary driving rod, and the first rotary driving 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 part, wherein 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 part, so that the second rotary driving rod can drive the second transmission part to move along the second rotary driving rod, and the second rotary driving rod is preferably a screw rod or a threaded rod.
The electric surgical instrument further comprises a firing button assembly, wherein the firing button assembly is connected with the control circuit and used for providing a signal for controlling the movement of the driving assembly.
The powered surgical instrument further includes a reset button coupled to the control circuit for providing a signal for controlling movement of the drive assembly.
The powered surgical instrument further includes a switch coupled to the control circuit for providing a signal for controlling movement of the switch 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 recovery of patients. The invention provides an electric surgical instrument which can realize the 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, through setting the initial driving state, a safety structure for preventing false firing is formed. The electric surgical instrument realizes automatic switching of cutting suture and output modes through the two motors, and the power of the motor used for switching the output modes is smaller than that of the motor used for firing the electric anastomat, so that the manufacturing cost of the electric surgical instrument is saved.
Detailed Description
Fig. 1 is a schematic view of an electrically powered surgical instrument according to a first embodiment of the present invention. Fig. 2 is a schematic exploded view of a cutting suture portion of a powered surgical instrument according to a first embodiment of the present invention. For ease of understanding, the cut-and-stitch portion of fig. 1 is shown in a unitary construction with the hand piece being shown in a substantially cut-away view to illustrate its internal construction. The electric surgical instrument according to the first embodiment of the present invention is an anorectal electric stapler 100 including a cutting suture portion 1100 and a hand-held portion 1200. Cutting suture 1100 may enable clamping, cutting and stapling of anorectal mucosal tissue, the cutting suture 1100 including an anvil assembly 1110 and a staple storage assembly 1120. The anvil assembly 1110 includes an annular anvil 1111 and an anvil driver 1112. The staple storage assembly 1120 includes a staple storage assembly housing 1121, a push staple assembly 1122, and an annular staple cartridge 1123. Staples (not shown) are disposed within annular staple cartridge 1123. The anvil assembly 1110 is driven by the anvil driver 1112 to axially displace the anvil assembly forward and backward to effect clamping and release of tissue. The staple storage assembly 1120 also includes an annular cutter (not shown) disposed on the staple pusher assembly 1122.
The hand-held portion 1200 includes a drive assembly 1210, a switching assembly 1220, a first power output assembly 1230, a second power output assembly 1240, a power supply assembly 1250, a control circuit 1260, and a 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. The drive assembly 1210, including a drive gear 1212 and a first motor 1211, may also include a reduction gearbox and/or encoder for use with the motor.
The control circuit 1260 includes a circuit board 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. A control circuit 1260 is connected to the switching component 1220 and controls the switching component 1220.
The housing portion 1270 can house a drive assembly 1210, a switching assembly 1220, a power assembly 1250, and a control circuit 1260. And is configured to receive at least a portion of the first and second power take-off assemblies 1230, 1240.
The hand-held portion 1200 further includes a firing button assembly 1280, the firing button assembly 1280 being coupled to the control circuit 1260 for providing a drive signal for driving the anorectal electric stapler 100. The handpiece 1200 further includes a switch 1285, the switch 1285 being coupled to the control circuit 1260 for providing a drive signal for driving the switching assembly 1220.
The firing button assembly 1280 is pressed, the firing button assembly 1280 provides a closing signal or a firing signal of the anvil cartridge to a signal input port of the control circuit 1260, an 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 suture portion 1100. In the first output mode, the firing button assembly 1280 outputs an anvil cartridge closure signal via the control circuit 1260, and power output by the drive assembly 1210 is transferred to the first power output 1230 and further to the anvil drive 1112 to effect pulling of the anvil assembly 1110 and clamping of tissue to be cut between the anvil assembly 1110 and the staple storage assembly 1120. Then, the switch 1285 is toggled to drive the switching assembly 1220 through the control circuit 1260 to transition 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, the staple pushing assembly 1122 drives the cutting knife and the staple pushing sheet and drives the staples in the annular staple cartridge 1123, thereby achieving the firing of the cut suture portion 1100 and completing 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 knob 1290. After cutting and stapling of tissue is completed, the switch 1285 is actuated to switch the output mode back to the first output mode by the control circuit 1260 driving the switch assembly 1220. The reset knob 1290 then provides a drive signal through the control circuit 1260 to control the drive assembly 1210. The power from the drive assembly 1210 is again transferred to the anvil drive 1112 to move the anvil assembly 1110 away from the staple storage assembly 1120 to effect release of the stapled tissue.
Fig. 3 is a partial schematic view of an electrically powered surgical instrument according to a first embodiment of the present invention, fig. 4 is a schematic view of an electrically powered surgical instrument switching assembly according to the first embodiment of the present invention, and fig. 5 is a schematic exploded view of a partial switching assembly of the switching assembly according to the first embodiment of the present invention. A drive assembly 1210 comprising a first motor 1211 and a drive gear 1212, said drive assembly 1210 having a drive shaft 12111. The driving gear is provided on the driving shaft 12111 to rotate with the driving shaft 12111. The drive assembly 1210 may also include a reduction gearbox and/or encoder configured to mate with the first motor.
The switching assembly 1220 is engageable with the drive assembly 1210, and the switching assembly 1220 includes 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 part includes a switching fork 1225, a second motor 1226, and a driving lever 1227. The first gear assembly 1221, second gear assembly 1222, and third gear assembly 1223 are disposed on the shaft 1224 and rotatable about the shaft 1224. The first gear assembly 1221 includes a first gear portion 12211, a first engagement portion 12212, and a second engagement portion 12213. The first gear portion 12211 meshes with the drive gear 1212 of the drive assembly 1210, receiving a power input from the drive assembly 1210. The second gear assembly 1222 includes a second gear portion 12221 and a third gear portion 12222, and the third gear assembly 1223 includes a third gear portion 12231 and a fourth gear portion 12232. The engagement portion may be a gear engagement portion or a spline engagement portion.
The first engagement portion 12212 of the first gear assembly 1221 is capable of engaging with the third engagement portion 12222 of the second gear assembly 1222 so that the first gear assembly 1221 and the second gear assembly 1222 can rotate synchronously, and the second engagement portion 12213 of the first gear assembly 1221 is capable of engaging with the fourth engagement portion 12232 of the third gear assembly 1223 so that the first gear assembly 1221 and the third gear assembly 1223 can rotate synchronously. Toggling the switch 1285 located on the housing, driving the second motor 1226 via the control circuit 1260, and driving the switch fork 1225 via the drive rod 1227 by the second motor 1226, causes the first gear assembly 1221 to switch between at least two positions, wherein when the switch fork 1225 pushes the first gear assembly 1221 to the first position, 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, such that the first gear assembly 1221 and the second gear assembly 1222 can rotate synchronously. 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 synchronously.
Based on the above-described structure, the switching assembly 1220 enables the power input obtained from the driving assembly 1210 to be output to other assemblies through the second gear assembly 1222 and the third gear assembly 1223 in a switchable manner. The three gear assemblies of the first gear assembly 1221, the second gear assembly 1222, and the third gear assembly 1223 are coaxially aligned. Although one specific gear portion diameter relationship of the gear assembly is shown in fig. 1, this is not a limitation on the relationship of gear diameters, and the relationship of gear diameters may be appropriately adjusted according to the gear ratio.
A first power take off assembly 1230 comprising a first power gear 1231, a first rotary drive rod 1232 and a first transmission 1233, said first power gear 1231 being capable of meshing with said second gear assembly 1222 of said switch assembly 1220. The first rotation driving rod 1232 cooperates with the first transmission member 1233 such that the first rotation driving rod 1232 can drive the first transmission member 1233 to move substantially linearly. The first transmission member 1233 can be coupled to the anvil drive member 1112 to effect transmission of power. The anvil driver 1112 enables control of the closing and opening of the anvil assembly 1110 and the anvil storage assembly 1120 by driving the anvil assembly 1120.
When the first gear assembly 1221 is pushed to the first position by driving the shift fork 1225 using the second motor 1226, the first engagement part 12212 of the first gear assembly 1221 and the third engagement part 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 synchronously. Since the second gear portion 12221 of the second gear assembly 1222 is in engagement with the first power gear 1231 of the first power output assembly 1230, power from the drive assembly 1210 is transferred to the first power output assembly 1230. Wherein the first rotary drive rod 1232 is rotatable. The first rotary drive rod 1232 may be a threaded screw or rod, at least partially threaded. 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 thereon, which moves along the thread of the screw rod or the screw rod to generate a linear motion of the first transmission member 1233. As shown in fig. 3, the screw 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 a rapid closure of the anvil cartridge at the initial stage of closure and a pressure closure at the final stage of closure.
The second power take off assembly 1240 includes a second power gear 1241, a second rotary drive rod 1242 and a second transmission 1243. The second power gear 1241 is capable of meshing with the third gear assembly 1223 of the switching assembly 1220. The second rotation driving rod 1242 cooperates with the second transmission part 1243, so that the second rotation driving rod 1242 can drive the second transmission part 1243 to move substantially linearly. The second drive 1243 can be connected to the staple pusher assembly 1122 via a staple pusher drive bar 1244 to effect transmission of power to complete firing of the cutting knife and staples.
When the switch 1285 located on 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 is pushed to the second position, the first gear assembly 1221 and the third gear assembly 1223 are meshed with each other, and the third gear portion 12231 of the third gear assembly 1223 is meshed with the second power gear 1241 of the second power output assembly 1240, so that the power from the driving assembly 1210 is transmitted to the second power output assembly 1240. Power is transferred from the second power output assembly 1240 to the staple pusher assembly 1122 which cuts the staple 1100. Wherein the second rotary drive rod 1242 is rotatable. The second rotary drive rod 1242 may be a threaded screw or rod, at least partially threaded. The second transmission 1243 is engaged with the threads of the lead screw or threaded rod. The second transmission member 1243 may have a pin thereon, and the pin may move along the screw thread of the screw rod or the screw rod to generate a linear motion of the second transmission member 1243.
The drive shaft 12111 of the drive assembly 1210 is substantially parallel to the shaft 1224 of the switching assembly 1220. Further, the drive shaft 12111 of the drive assembly 1210 is substantially parallel to the first rotary drive rod 1232 of the first power take-off assembly 1230. Further, the drive shaft 12111 of the drive assembly 1210 assembly is substantially parallel to the second rotary drive rod 1242 of the second power take off assembly 1240.
Fig. 6 is a partial schematic view of an electrically powered surgical instrument according to a second embodiment of the invention, and fig. 7 is a schematic view of an electrically powered surgical instrument switching assembly according to a second embodiment of the invention. The switching assembly 2220 is capable of meshing with the drive assembly 2210, the switching assembly 2220 including a first gear assembly 2221, a second gear assembly 2222, a third gear assembly 2223, a shaft 2224, and an output switching section. The output switching part includes a switching fork 2225, a second motor 2226, and a screw 2227. The first gear assembly 2221 is located between the second gear assembly 2222 and the third gear assembly 2223. The first gear assembly 2221, the second gear assembly 2222, and the third gear assembly 2223 are interconnected and disposed on the shaft 2224. The first gear assembly 2221, the second gear assembly 2222, and the third gear assembly 2223 are capable of rotating simultaneously. The first gear assembly 2221 includes a first gear portion, the second gear assembly 2222 includes a second gear portion, and the third gear assembly 2223 includes a third gear portion. The first gear assembly 2221 is meshed with a drive gear 2212 of the drive assembly 2210, receiving a power input from the drive assembly 2210. By pulling the selector switch (refer to fig. 1) and driving the second motor 2226 to drive the switch fork 2225 through the control circuit (refer to fig. 1), the first gear assembly 2221 can be switched between at least two positions. When the shift fork 2225 pushes the first gear assembly 2221 to the first position, the second gear assembly 2222 is engaged with the first power gear portion 2231 of the first power output assembly 2230, the third gear assembly 2223 is disengaged from the second power output assembly 2240, and power from the driving assembly 2210 is transmitted to the first power output assembly 2230. When the shift fork 2225 pushes the first gear assembly 2221 to the second position, the third gear assembly 2223 meshes with the second power gear part 2241 of the second power output assembly 2240, and the second gear assembly 2222 is separated from the first power output assembly 2230, thereby achieving power transmission from the driving assembly 2210 to the second power output assembly 2240.
Based on the above-described structure, the switching assembly 2220 enables the power input obtained from the driving assembly 2210 to be output to other assemblies through the second gear assembly 2222 and the third gear assembly 2223 in a switchable manner. The three gear assemblies of the first gear assembly 2221, the second gear assembly 2222, and the third gear assembly 2223 are coaxially arranged.
Fig. 8 is a partial schematic view of an electrically powered surgical instrument according to a third embodiment of the present invention, and fig. 9 is a schematic view of an electrically powered surgical instrument switching assembly according to a third embodiment of the present invention. The switching assembly 3220 is capable of being meshed with the drive 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 section. The output switching part includes a switching fork 3225, a second motor 3226, and a screw rod 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 illustrates that the second gear assembly 3222 is located between the first gear assembly 3221 and the third gear assembly 3223, in practice, the third gear assembly 3223 may 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 mutually connected and arranged on the shaft 3224, the second gear assembly 3222 and the third gear assembly 3223 can be directly and fixedly connected, and the first gear assembly can be connected with the second gear assembly 3222 through a connecting cylinder 3229. The first, second and third gear assemblies 3221, 3222 and 3223 can rotate simultaneously. 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 meshed with a drive gear 3212 of the drive assembly 3210, receiving a power input from the drive assembly 3210. Toggling the switch (see switch 1285 in fig. 1) drives the switch fork 3225 by the control circuit (see control circuit 1260 in fig. 1) driving the second motor 3226, the first gear assembly 3221 may be switched in at least two positions. The first gear assembly 3221 may be pushed to the first position by driving the switching fork 3225 by driving the second motor 3226, the second gear assembly 3222 is in engagement with the first power gear portion 3231 of the first power output assembly 3230, the third gear assembly 3223 is separated from the second power output assembly 3240, and the power from the driving assembly 3210 is transmitted to the first power output assembly 3230. When the switching fork 3225 pushes the first gear assembly 3221 to the second position, the third gear assembly 3223 is meshed 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, so that power from the driving assembly 3210 is transmitted to the second power output assembly 3240.
Based on the above-described structure, the switching assembly 3220 realizes that the power input obtained from the driving assembly 3210 is output to other assemblies through the second gear assembly 3222 and the third gear assembly 3223 in a switchable manner. The three gear assemblies 3221, 3222 and 3223 are coaxially arranged.
During the operation, the hemorrhoid tissue to be resected is placed in the cavity inside the nail storage component of the anorectal electric anastomat. The switching fork keeps the switching assembly in a state meshed with the first power output assembly, and at the moment, the switching fork plays a role in safety, and the cutting suture part is prevented from being wrongly triggered in the operation process because the switching fork is not meshed with the second power output assembly. The firing button assembly is pressed to provide a closing signal for the control circuit, so that the driving assembly outputs power, the nail anvil assembly moves towards the direction close to the nail storage assembly, and the hemorrhoid tissue to be resected is clamped. The switch located on the shell is shifted, the second motor of the switch assembly is driven through the control circuit, the second motor drives the switch shifting fork through the driving rod, and the switch 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 meanwhile, the anastomat is used for suturing the wound surface. After the control circuit is kept for a specific time, the motor of the driving assembly is reversely moved to provide reverse driving force, and the cutting knife and the nail pushing assembly are retracted. The switch located on the shell is shifted to drive the second motor, the second motor drives the switching fork through the driving rod, and the switching assembly is arranged at a position meshed with the first power output assembly. Pressing the reset button provides a reset signal to the control circuit, so that the driving assembly provides a reverse driving force, the nail anvil assembly moves away from the nail storage assembly, the cutting suture part opens, and the clamped tissue is released. The stapler is withdrawn.
Fig. 10 is a schematic view of an electric surgical instrument according to a fourth embodiment of the present invention, and fig. 11 is a schematic view of a cutting suture portion of the electric surgical instrument according to the fourth embodiment of the present invention. The electric surgical instrument according to the fourth embodiment of the present invention is a tubular electric stapler 400 including a cutting suture portion 4100 and a hand-held portion 4200. The incised suture part 4100 may realize clamping, incising, and suturing of the separated digestive tract tissues, and connection of the separated digestive tract tissues. The cut seam 4100 includes an anvil assembly 4110 and a staple storage assembly 4120. The anvil assembly 4110 includes an annular anvil housing 4111 and an anvil rod 4112. The staple storage assembly 4120 includes a staple storage assembly housing 4121, a staple pusher assembly (not shown), an annular staple cartridge 4123, an anvil driver 4124, and an annular cutter 4125. Staples (not shown) are disposed within annular staple cartridge 4123. The anvil driver 4124 is detachably connected to the anvil assembly, and the anvil driver 4124 drives the anvil assembly 4110 to axially displace the anvil assembly in the forward and backward directions to clamp and release tissue.
The hand-held portion 4200 includes a drive assembly 4210, a switching assembly 4220, a first power output assembly 4230, a second power output assembly 4240, a power supply assembly 4250, a control circuit 4260, and a housing portion 4270. The power supply assembly 4250 provides electrical power to the entire powered surgical instrument, including a battery, which may be a disposable or rechargeable battery. The battery may be fixed in the hand-held portion 4200 or may be detachably provided in the hand-held portion 4200. The drive assembly 4210 comprises a drive gear 4212 and a motor 4211, and may also comprise 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 coupled to the drive assembly 4210 and controls the drive assembly 4210.
The housing portion 4270 is capable of housing a drive assembly 4210, a switching assembly 4220, a power assembly 4250, and a control circuit 4260. And is configured to receive at least a portion of first power take-off assembly 4230 and second power take-off assembly 4240.
The hand-held portion 4200 further includes a firing button assembly 4280, wherein the firing button assembly 4280 is coupled to the control circuit 4260 for providing a drive signal for driving the tubular powered stapler 400. Pressing the firing button assembly 4280, the firing button assembly 4280 provides an anvil cartridge closing signal or 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 drive assembly 4210, the drive assembly 4210 outputs power outwardly, and the power is transmitted to the cutting stitch 4100. In the first output mode, the firing button assembly 4280 outputs an anvil cartridge closure signal via the control circuit 4260, and power output by the drive assembly 4210 is transferred to the first power output 4230 and further to the anvil driver 4124 to effect pulling of the anvil assembly 4110 and clamping of the alimentary tract tissue between the anvil assembly 4110 and the staple storage assembly 4120. Toggling the switch 4285 located on the housing drives the second motor 4226, and the second motor 4226 drives the switch fork 4225 through the drive rod 4227 to change the output mode to the second output mode. 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 staple pushing assembly 4122, and the staple pushing assembly 4122 drives the cutting knife and the staple pushing sheet and drives the staples in the annular staple cartridge 4123, so that the firing of the cut suture portion 4100 is realized, and the cutting and the suturing of the tissues are completed. The firing button assembly 4280 can be provided to the housing portion 4270.
The hand piece 4200 also includes a reset button 4290. After cutting and stapling of the tissue is completed, switching assembly 4220 is provided to switch the output mode back to the first output mode, and reset button 4290 provides a drive signal through control circuit 4260 to control drive assembly 4210. The power from the drive assembly 4210 is again transferred to the anvil drive 4124, causing the anvil assembly 4110 to move away from the staple storage assembly 4120, effecting release of the stapled tissue.
Fig. 12 is a partial schematic view of an electrically powered surgical instrument according to a fourth embodiment of the present invention, fig. 13 is a schematic view of an electrically powered surgical instrument switching assembly according to the fourth embodiment of the present invention, and fig. 14 is a schematic exploded view of a partial switching assembly of the switching assembly according to the fourth embodiment of the present invention.
A drive assembly 4210 comprising a first motor 4211 and a drive gear 4212, said 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 further comprise a reduction gearbox and/or encoder configured to mate with the first motor.
The switching assembly 4220 is capable of engagement with the drive assembly 4210, the switching assembly 4220 comprising a first gear assembly 4221, a second gear assembly 4222, a third gear assembly 4223, a shaft 4224, and an output switch. The output switching part includes a switching fork 4225, a second motor 4226, and a driving lever 4227. The first gear assembly 4221, the second gear assembly 4222, and the third gear assembly 4223 are disposed on the shaft 4224, and are rotatable about the shaft 4224. The first gear assembly 4221 comprises a first gear portion 42211, a first engagement portion 42212, and a second engagement portion 42213. The first gear portion 42211 is meshed with the drive gear 4212 of the drive assembly 4210 to receive a power input from the drive assembly 4210. The second gear assembly 4222 includes a second gear portion 42221 and a third gear portion 42222, and the third gear assembly 4223 includes a third gear portion 42231 and a fourth gear portion 42232. The engagement portion may be a gear engagement portion or a spline engagement portion.
The first engagement portion 42212 of the first gear assembly 4221 can be engaged with the third engagement portion 42222 of the second gear assembly 4222 so that the first gear assembly 4221 and the second gear assembly 4222 can be rotated synchronously, and 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 synchronously. The switch 4285 disposed on the housing is shifted, the second motor 4226 is driven by the control circuit 4260, the second motor 4226 drives the switch fork 4225 by the driving rod 4227, so that the first gear assembly 4221 can be switched between at least two positions, and when the switch fork 4225 pushes the first gear assembly 4221 to the first position, 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 synchronously rotate. When the switching 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 rotated synchronously.
Based on the above-described structure, the switching assembly 4220 enables the power input obtained from the driving assembly 4210 to be output to other assemblies through the second gear assembly 4222 and the third gear assembly 4223 in a switchable manner. The three gear assemblies, a first gear assembly 4221, a second gear assembly 4222 and a third gear assembly 4223, are coaxially aligned. Although a specific gear portion diameter relationship of the gear assembly is shown in fig. 10, this is not a limitation on the relationship of gear diameters, and the relationship of gear diameters may be appropriately adjusted according to the gear ratio.
A first power take-off assembly 4230 comprising a first power gear 4231, a first rotary drive lever 4232 and a first transmission member 4233, said first power gear 4231 being capable of meshing with said second gear assembly 4222 of said switching assembly 4220. The first rotation driving rod 4232 cooperates with the first transmission member 4233 such that the first rotation driving rod 4232 can drive the first transmission member 4233 to move substantially linearly. The first transmission member 4233 may be coupled to the anvil drive member 4124 to effect transmission of power. The anvil driver 4124 controls the closing and opening of the anvil assembly 4110 and the anvil 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 synchronously. Since the second gear portion 42221 of the second gear assembly 4222 is in engagement with the first power gear 4231 of the first power output assembly 4230, power from the drive assembly 4210 is transferred to the first power output assembly 4230. Wherein the first rotary drive lever 4232 is rotatable. The first rotary drive bar 4232 may be an at least partially threaded lead screw or threaded rod. The first gear 4233 mates with the threads of the lead screw or threaded rod. The first driving member 4233 may have a pin thereon, which moves along the thread of the screw rod or the screw rod to generate linear motion of the first driving member 4233. As shown in fig. 12, the screw 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 a rapid closure of the anvil cartridge at the initial stage of closure and a pressure closure at the final stage of closure.
The second power output assembly 4240 includes a second power gear 4241, a second rotary drive lever 4242, and a second transmission member 4243. The second power gear 4241 is capable of meshing with the third gear assembly 4223 of the switching assembly 4220. The second rotation driving rod 4242 cooperates with the second transmission member 4243, such that the second rotation driving rod 4242 can drive the second transmission member 4243 to move substantially linearly. The second drive member 4243 may be coupled to the staple pusher assembly 4122 via a staple pusher drive bar 4244 to effect transmission of power to complete firing of the cutting knife and staples.
When the switch 4285 positioned on the housing is shifted to drive the second motor 4226, the second motor 4226 drives the switch fork 4225 through the driving rod 4227 to push the first gear assembly 4221 to the second position, the first gear assembly 4221 and the third gear assembly 4223 are engaged with each other, and the third gear portion 42231 of the third gear assembly 4223 is engaged with the second power gear 4241 of the second power output assembly 4240, so that the power from the driving assembly 4210 is transmitted to the second power output assembly 4240. Power is transferred from the second power take-off assembly 4240 to the staple pusher assembly 4122 which cuts the staples 4100. Wherein the second rotary drive lever 4242 is rotatable. The second rotary drive rod 4242 may be an at least partially threaded lead screw or threaded rod. The second drive 4243 mates with the threads of the lead screw or threaded rod. The second driving member 4243 may have a pin thereon, which moves along the thread of the screw rod or the screw rod to generate linear motion of the second driving member 4243.
The drive shaft 42111 of the drive assembly 4210 is substantially parallel to the shaft 4224 of the switching 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 take off 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 take off assembly 4240.
As shown, the switching assembly 4220 in this fourth embodiment has the same structure as the switching assembly 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 nail storage assembly of the tubular electric stapler. The switching fork keeps the switching assembly in a state meshed with the first power output assembly, and at the moment, the switching fork plays a role in safety, and the cutting suture part is prevented from being wrongly triggered in the operation process because the switching fork is not meshed with the second power output assembly. The firing button assembly is pressed to provide a closing signal for the control circuit, so that the driving assembly outputs power, the nail anvil assembly moves towards the direction close to the nail storage assembly, and the alimentary canal tissue to be resected is clamped. Then, the switch is toggled, the switch fork is driven by the control circuit, and the switch 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 meanwhile, the anastomat is used for suturing the wound surface. After the control circuit is kept for a specific time, the motor of the driving assembly is reversely moved to provide reverse driving force, and the cutting knife and the nail pushing assembly are retracted. The switching switch is toggled, the switching fork is driven by the control circuit, and the switching assembly is arranged at a position meshed with the first power output assembly. Pressing the reset button provides a reset signal to the control circuit, so that the driving assembly provides a reverse driving force, the nail anvil assembly moves away from the nail storage assembly, the cutting suture part opens, and the clamped tissue is released. The stapler is withdrawn.
The tubular anastomat and the anorectal anastomat are required to drive the nail anvil assembly to close the nail anvil nail bin firstly to clamp tissues, and then drive the nail pushing assembly and the cutting knife to cut tissues. The moving processes of the nail anvil and the nail pushing assembly are mutually independent, and the driving of the nail anvil and the nail pushing assembly is realized through two relatively independent driving or transmission structures. Since the switching assembly 4220 of the fourth embodiment has the same structure as the switching assembly 1220 of the first embodiment, the switching structure 2220,3220 of the second and third embodiments of the present invention can be used for a motorized tubular stapler as well.
The electric surgical instrument hand-held part 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. Stable cutting of the cutting assembly and effective stapling of the staples can be achieved. Reduce postoperative bleeding and accelerate recovery of patients. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, the setting of the initial driving state is realized through the second motor, and a safety structure for preventing false firing is formed.
The foregoing description of the preferred embodiments of the present invention is provided for illustration, but 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 be changed, and all changes made within the scope of the invention as independently claimed are within the scope of the invention.