Electric surgical instruments

Abstract

The present invention relates to an electric surgical instrument. The electric surgical instrument comprises: a cutting and suturing part and a handheld part, wherein the handheld part comprises: a switching component; the switching component can mesh with the driving component to obtain power input; the switching component comprises a shaft, a first gear and an output switching part; the output switching part comprises a second motor, a transmission rod and an engagement member; the output switching part is coupled with the first gear; the switching component meshes with the driving gear of the driving component; the switching engagement member can put the switching component in a first output mode or a second output mode. The electric surgical instrument provided by the present invention realizes the closing, firing and resetting of the nail magazine assembly through a high-power first motor. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. At the same time, the output mode is switched through a low-power second motor, and the initial driving state can be set to form a safety structure to prevent accidental firing.

Description

Technical Field

[0001] The invention relates to a medical surgical instrument, in particular to an electric surgical instrument having an annular nail magazine and an annular nail support, and can be an electric tubular stapler or an electric anorectal stapler. Background Art

[0002] Staplers are commonly used in surgical operations to achieve tissue removal and wound closure. Staplers include linear cutting staplers, tubular staplers, laparoscopic linear cutting staplers, etc. These staplers can be used to remove diseased tissues of the lungs, intestines, and stomach, and to seal the wound at the same time. During the operation, the stapler's end effector clamps and squeezes the tissue, and then the tissue is cut with a cutting knife. For the resulting wound, staples are used to quickly suture it. The use of staplers shortens the operation time, improves the success rate of the operation, and speeds up postoperative recovery.

[0003] The staplers currently in use are mainly of two types: manually operated and electrically operated. During the operation, the front end of the stapler must be used to clamp the tissue to be cut and prepare for firing. For manually operated staplers, during the firing process, the doctor must hold the stapler in mid-air and press the handle to complete the firing. During the entire firing process, the hand provides two forces, support and pressing, and it is easy for the stapler to shake due to hand shaking. For anorectal staplers and tubular staplers, although the firing process is completed by pressing the handle once, there is still the problem of uneven force application during the entire firing process when the handle is pressed using the gripping force of the hand. The unstable and uneven force applied during manual firing will affect the final staple forming effect, causing defects in staple forming and an uneven cutting surface of the cutting knife.

[0004] For an electric stapler, the doctor only needs to hold the stapler steadily and move the cutting knife and staples by pressing buttons, which can achieve smooth movement of the cutting knife and smooth and continuous suturing of the staples, thereby effectively ensuring the cutting effect. Summary of the invention

[0005] The present invention provides an electric surgical instrument that can achieve smooth cutting and effective suturing of tissues. The electric surgical instrument provided by the present invention achieves closing, firing and resetting of a stapler assembly through a first motor. It can improve surgical efficiency and reduce the impact of human operation. It can achieve stable cutting of the cutting assembly and effective suturing of staples. It can reduce postoperative bleeding and speed up patient recovery. It reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, the initial driving state is set by the second motor, forming a safety structure to prevent misfiring. The present invention provides an electric surgical instrument that uses a high-power motor to smoothly fire the stapler assembly. The present invention provides an electric surgical instrument that uses a high-power motor to achieve closing, firing and resetting of the stapler assembly; and uses a low-power motor to achieve switching of drive modes.

[0006] The present invention provides an electric surgical instrument, characterized in that the electric surgical instrument comprises a cutting and suturing part, the cutting and suturing part comprises a nail anvil assembly and a nail storage assembly; the nail anvil assembly comprises an annular nail support; the nail storage assembly comprises a nail storage assembly housing, an annular cutting knife, a nail pushing assembly and an annular nail magazine; and a handheld part, the handheld part comprises: a power supply assembly; a driving assembly comprising a driving gear and a first motor; a switching assembly, the switching assembly can be engaged with the driving assembly to obtain power input; the switching assembly comprises a shaft, a first gear and an output switching part; the first gear is arranged on the shaft and meshes with the driving gear of the driving assembly; the output switching part comprises a second motor, a transmission rod and a meshing member; the output switching part is coupled to the first gear; the switching assembly meshes with the driving gear of the driving assembly; the switching meshing member can put the switching assembly in a first output mode or a second output mode; the first power output assembly comprises a first power gear, a first rotating drive rod and A first transmission member; the first power gear is fixedly connected to the first rotation drive rod so that the first power gear and the first rotation drive rod can rotate synchronously; the first rotation drive rod cooperates with the first transmission member so that the first rotation drive rod can drive the first transmission member to move along the first rotation drive rod; the first rotation drive rod is preferably a screw rod or a threaded rod; a second power output assembly, including a second power gear, a second rotation drive rod and a second transmission member; the second power gear is fixedly connected to the second rotation drive rod so that the second power gear and the second rotation drive rod can rotate synchronously; the second rotation drive rod cooperates with the second transmission member so that the second rotation drive rod can drive the second transmission member to move along the second rotation drive rod; the second rotation drive rod is preferably a screw rod or a threaded rod; a control circuit, the control circuit connects the drive assembly and the switching assembly, and controls the drive assembly and the switching assembly; and a housing. The power from the drive assembly is selectively transmitted to the first power output assembly or the second power output assembly through the switching assembly to realize the selection of the power output path. At the same time, for the two-choice switch, the switching assembly constitutes a structure similar to insurance to prevent the other transmission structures from being triggered by mistake.

[0007] In the first output mode, the first gear is meshed with the driving gear and the first power gear of the first power output assembly at the same time; in the second output mode, the first gear is meshed with the driving gear and the second power gear of the second power output assembly at the same time. After the first gear is meshed with the first power gear or the second power gear, the power from the driving assembly is transmitted to the first power output assembly or the second power output assembly through the first power gear or the second power gear, thereby realizing the switching of the power transmission path.

[0008] The switching assembly further includes a second gear disposed on the shaft, the second gear being connected to the first gear and being capable of rotating simultaneously; in the first output mode, the second gear is meshed with the first power gear of the first power output assembly; in the second output mode, the second gear is meshed with the second power gear of the second power output assembly. Different switching assembly structures are provided, and power is directly output to the first power output assembly or the second power output assembly through the second gear.

[0009] The switching assembly also includes a second gear arranged on the shaft, the second gear is connected to the first gear and can rotate simultaneously; in the first output mode, one of the first gear and the second gear is meshed with the first power gear of the first power output assembly; in the second output mode, the other of the first gear and the second gear is meshed with the second power gear of the second power output assembly.

[0010] The handheld portion of the electric surgical instrument also includes a firing button assembly, which is connected to the control circuit and is used to provide a signal for controlling the movement of the drive assembly.

[0011] The handheld portion of the electric surgical instrument further includes a reset button, which is connected to the control circuit and is used to provide a signal for controlling the movement of the drive assembly.

[0012] The handheld part of the electric surgical instrument also includes a switching switch, which is connected to the control circuit and is used to provide a signal for controlling the movement of the switching component.

[0013] The electric surgical instrument according to any one of the aforementioned items is characterized in that the electric surgical instrument is an anorectal stapler or a tubular stapler.

[0014] The present invention provides an electric surgical instrument that utilizes a high-power motor to smoothly fire a staple magazine assembly. The present invention provides an electric surgical instrument that utilizes a high-power motor to realize the closing, firing and resetting of the staple magazine assembly; and utilizes a low-power motor to realize the switching of the driving mode. The present invention provides an electric surgical instrument that can realize the smooth cutting and effective suturing of tissues. The electric surgical instrument provided by the present invention realizes the closing, firing and resetting of the staple magazine assembly through a first motor. It can improve the surgical efficiency and reduce the influence of human operation. It can realize the stable cutting of the cutting assembly and the effective suturing of the staples. It can reduce postoperative bleeding and accelerate the recovery of patients. It reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, the setting of the initial driving state is realized through the second motor, forming a safety structure to prevent accidental firing.

[0015] Instruction Manual

[0016] Figure 1 is a schematic diagram of an electric surgical instrument according to a first embodiment of the present invention;

[0017] Figure 2 is a disassembled schematic diagram of a cutting and suturing portion of an electric surgical instrument according to a first embodiment of the present invention;

[0018] Figure 3 is a partial schematic diagram of an electric surgical instrument according to a first embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of an electric surgical instrument switching assembly according to a first embodiment of the present invention;

[0020] Figure 5 is a partial schematic diagram of an electric surgical instrument according to a second embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of a switching assembly of an electric surgical instrument according to a second embodiment of the present invention;

[0022] Figure 7 is a schematic diagram of an electric surgical instrument according to a third embodiment of the present invention.

[0023] Figure 8 is a schematic diagram of a cutting and suturing portion of an electric surgical instrument according to a third embodiment of the present invention;

[0024] Fig. 9 is a partial schematic diagram of an electric surgical instrument according to a third embodiment of the present invention;

[0025] Fig.10 4 is a schematic diagram of a switching assembly of an electric surgical instrument according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0026] Figure 1 is a schematic diagram of an electric surgical instrument according to a first embodiment of the present invention; Figure 2 1 is a schematic diagram of the disassembly of the cutting and suturing part of the electric surgical instrument according to the first embodiment of the present invention. Figure 1The cutting and suturing part is a schematic diagram of the overall structure, and the handheld part is basically a cross-sectional view to show its internal structure. The electric surgical instrument according to the first embodiment of the present invention is an anorectal electric stapler 100, a cutting and suturing part 1100 and a handheld part 1200. The cutting and suturing part 1100 can achieve the clamping, cutting and suturing of the anorectal mucosal tissue, and the cutting and suturing part 1100 includes a nail anvil assembly 1110 and a nail storage assembly 1120. The nail anvil assembly 1110 includes an annular nail support 1111 and an anvil driving member 1112. The nail storage assembly 1120 includes a nail storage assembly housing 1121, a nail pusher assembly 1122 and an annular nail magazine 1123. Staples (not shown) are arranged in the annular nail magazine 1123. The nail anvil driving member 1112 drives the nail anvil assembly 1110 to achieve axial front-to-back displacement in the axial direction, thereby achieving the clamping and resetting of the tissue. The nail storage assembly 1120 further includes an annular cutting knife (not shown), which is disposed on the nail pushing assembly 1122 .

[0027] The handheld part 1200 includes: a driving component 1210, a switching component 1220, a first power output component 1230, a second power output component 1240, a power supply component 1250, a control circuit 1260 and a housing 1270. The power supply component 1250 provides power for the entire electric surgical instrument, and includes a battery, which can be a disposable battery or a rechargeable battery. The battery can be fixed in the handheld part 1200, or can be detachably arranged in the handheld part 1200. The driving component 1210 includes a driving gear 1212 and a first motor 1211; it can also include a reduction box and / or an encoder used in conjunction with the motor.

[0028] The control circuit 1260 includes a circuit board and circuit elements. The control circuit 1260 includes an input port and an output port, and obtains an input signal through the input port and provides an output signal through the output port. The control circuit 1260 is connected to the driving component 1210 and controls the driving component 1210. The control circuit 1260 is connected to the switching component 1220 and controls the switching component 1220.

[0029] The housing 1270 can accommodate the driving assembly 1210 , the switching assembly 1220 , the power supply assembly 1250 , and the control circuit 1260 , and can accommodate at least a portion of the first power output assembly 1230 and the second power output assembly 1240 .

[0030] The handheld part 1200 further includes a firing button assembly 1280, which is connected to the control circuit 1260 and used to provide a driving signal for driving the anorectal electric stapler 100. The handheld part 1200 further includes a switching switch 1285, which is connected to the control circuit 1260 and used to provide a driving signal for driving the switching assembly 1220.

[0031] The firing button assembly 1280 is pressed, and the firing button assembly 1280 provides an anvil and nail magazine closing signal or a firing signal to the signal input port of the control circuit 1260, and the output port of the control circuit 1260 outputs a signal to the drive assembly 1210, and the drive assembly 1210 outputs power outward, 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 and nail magazine closing signal through the control circuit 1260, and the power output by the drive assembly 1210 is transmitted to the first power output part 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 nail storage assembly 1120. Then, the switching switch 1285 is toggled, and the second motor 1226 of the switching assembly 1220 is driven through the control circuit 1260, and the output mode is changed to the second output mode. Then, the firing button assembly 1280 outputs a firing signal through the control circuit, and the power output by the driving assembly 1210 is transmitted to the second power output part 1240, and further transmitted to the nail pushing assembly 1122. The nail pushing assembly 1122 drives the cutting knife and the nail pushing sheet, and drives the staples in the annular staple cartridge 1123, so as to realize the firing of the cutting and suturing part 1100, and complete the cutting and suturing of the tissue. The firing button assembly 1280 can be arranged on the housing part 1270.

[0032] The handheld part 1200 also includes a reset button 1290. After the cutting and suturing of the tissue is completed, the switch 1285 is toggled to drive the switching assembly 1220 through the control circuit 1260 to switch the output mode back to the first output mode. Then, the reset button 1290 provides a driving signal through the control circuit 1260 to control the driving assembly 1210. The power output by the driving assembly 1210 is transmitted to the anvil driving member 1112 again, so that the anvil assembly 1110 is away from the nail storage assembly 1120, thereby releasing the sutured tissue.

[0033] Figure 3 is a partial schematic diagram of an electric surgical instrument according to a first embodiment of the present invention; Figure 4 1 is a schematic diagram of a switching assembly of an electric surgical instrument according to a first embodiment of the present invention. The driving assembly 1210 includes a first motor 1211 and a driving gear 1212, and the driving assembly 1210 has a driving shaft 12111. The driving gear 1212 is disposed on the driving shaft 12111 and rotates with the driving shaft 12111. The driving assembly 1210 may also include a reduction box and / or an encoder that are matched with the motor.

[0034] The switching assembly 1220 can be meshed with the driving assembly 1210, and the switching assembly 1220 includes a first gear 1221, a shaft 1222 and an output switching part. The output switching part includes: a switching fork 1225, a second motor 1226 and a driving rod 1227. The first gear 1221 is arranged on the shaft 1222 and can rotate around the shaft 1222. The first gear 1222 is meshed with the driving gear 1212 of the driving assembly 1210 to receive the power input of the driving assembly 1210. Since the switching power required by the output switching part is provided by the second motor 1226, and the switching power is less than the power required for closing the nail magazine and cutting the tissue, the power of the second motor 1226 is less than the power of the first motor 1211.

[0035] The first power output assembly 1230 includes a first power gear 1231, a first rotation drive rod 1232 and a first transmission member 1233. The first power gear 1231 can mesh with the first gear 1221 of the switching assembly 1220. The first rotation drive rod 1232 and the first transmission member 1233 cooperate with each other, so that the first rotation drive rod 1232 can drive the first transmission member 1233 to move substantially in a straight line. The first transmission member 1233 can be connected to the anvil drive member 1112 to achieve power transmission. The anvil drive member 1112 controls the closing and opening of the anvil assembly 1110 and the nail storage assembly 1120 by driving the anvil assembly 1110.

[0036] When the second motor 1226 is used to drive the switching fork 1225 to push the first gear 1221 to the first position, the first gear 1221 is meshed with the driving gear 1212 and the first power gear 1231 at the same time. Therefore, the power from the driving assembly 1210 is transmitted to the first power output assembly 1230. The power is transmitted from the first transmission member 1233 of the first power output assembly 1230 to the anvil assembly 1110 through the anvil driving member 1112. The first rotating drive rod 1232 is rotatable. The first rotating drive rod 1232 can be a lead screw or a screw rod that is at least partially threaded. The first transmission member 1233 cooperates with the thread of the lead screw or the screw rod. The first transmission member 1233 can be provided with a pin, and the pin moves along the thread of the lead screw or the screw rod, so that the first transmission member 1233 produces a linear motion. The lead screw or the threaded rod can be a speed-changing lead screw or a speed-changing threaded rod. Figure 3 As shown, the thread of the speed change screw includes a first area and a second area, and the first area is closer to the first power gear 1231 than the second area. The pitch of the first area is greater than the pitch of the second area, thereby providing a fast closing of the nail anvil and nail magazine at the initial stage of closing, and a pressure closing at the end of closing.

[0037] The second power output assembly 1240 includes a second power gear 1241, a second rotation drive rod 1242, and a second transmission member 1243. The second power gear 1241 can mesh with the first gear 1221 of the switching assembly 1220. The second rotation drive rod 1242 cooperates with the second transmission member 1243, and the second transmission member 1243 can be provided with a pin, so that the second rotation drive rod 1242 can drive the second transmission member 1243 to move substantially in a straight line. The second transmission member 1243 can be connected to the nail pushing assembly 1122 through the nail pushing drive rod 1244 to achieve power transmission and complete the firing of the cutting knife and the staples.

[0038] When the second motor 1226 is used to drive the shift fork 1225 to push the first gear 1221 to the second position, the first gear 1221 is meshed with the driving gear 1212 and the second power gear 1241 at the same time. Therefore, the power from the driving assembly 1210 is transmitted to the second power output assembly 1240. The power is transmitted from the nail pushing driving rod 1244 of the second power output assembly 1240 to the nail pushing assembly of the nail storage assembly 1120. The second rotating driving rod 1242 is rotatable. The second rotating driving rod 1242 can be a screw rod or a screw rod that is at least partially threaded. The second transmission member 1243 cooperates with the thread of the screw rod or the screw rod. The second transmission member 1243 can be provided with a pin, and the pin moves along the thread of the screw rod or the screw rod, so that the second transmission member 1243 produces a linear motion.

[0039] The drive shaft 12111 of the drive assembly 1210 is substantially parallel to the shaft 1222 of the switching assembly 1220. Further, the drive shaft 12111 of the drive assembly 1210 is substantially parallel to the first rotation drive rod 1232 of the first power output assembly 1230. Further, the drive shaft 12111 of the drive assembly 1210 is substantially parallel to the second rotation drive rod 1242 of the second power output assembly 1240.

[0040] Figure 5 is a schematic diagram of an electric surgical instrument according to a second embodiment of the present invention; Figure 62 is a schematic diagram of a switching assembly according to a second embodiment of the present invention. The switching assembly 2220 can be engaged with the driving assembly 2210, and the switching assembly 2220 includes a first gear 2221, a second gear 2222, a shaft 2223 and an output switching part. The output switching part includes: a switching fork 2225, a second motor 2226 and a driving rod 2227. The first gear 2221 and the second gear 2222 are arranged on the shaft 2223. The first gear 2221 and the second gear 2222 are connected to each other, for example, by being connected to each other through a sleeve sleeved on the shaft 2223, or by being connected to each other through a connecting rod, so that the first gear 2221 and the second gear 2222 can rotate simultaneously. The first gear 2221 is engaged with the driving gear 2212 of the driving assembly 2210 to receive the power input of the driving assembly 2210. By toggling the switch, the control circuit drives the switching fork 2225 of the switching assembly 2220, so that the first gear 2221 and the second gear 2222 can be switched between at least two positions. When the switching fork 2225 pushes the first gear 2221 to the first position, the first gear 2221 is meshed with the driving gear 2212, and the second gear 2222 is in meshing state with the first power gear 2231 of the first power output assembly 2230, so that the power from the driving assembly 2210 is transmitted to the first power output assembly 2230. When the switching fork 2225 pushes the first gear 2221 to the second position, the first gear 2221 is meshed with the driving gear 2212, and the second gear 2222 is in meshing state with the second power gear 2241 of the second power output assembly 2240, so that the power from the driving assembly 2210 is transmitted to the second power output assembly 2240.

[0041] Based on the above structure, the switching component 2220 realizes outputting the power input obtained from the driving component 2210 to other components in a switchable manner through the second gear 2222. The first gear 2221 and the second gear 2222 are coaxially arranged.

[0042] Optionally, for the structure in which the switching assembly 2220 includes the first gear 2221 and the second gear 2222, another switching method can be provided: by toggling the switching switch, the switching fork 2225 of the switching assembly 2220 can be driven by the control circuit to switch the first gear 2221 and the second gear 2222 between at least two positions. When the switching fork 2225 pushes the first gear 2221 to the first position, the second gear 2222 is in meshing state with the first power gear 2231 of the first power output assembly 2230, and the first gear 2221 is meshing with the driving gear 2212, so as to realize the transmission of power from the driving assembly 2210 to the first power output assembly 2230. When the shift fork 2225 pushes the first gear 2221 to the second position, the first gear 2221 meshes with the second power gear 2241 of the second power output assembly 2240, and the second gear 2222 meshes with the driving gear 2212, so that the power from the driving assembly 2210 is transmitted to the second power output assembly 2240. However, whether in the first position or the second position, one of the first gear 2221 and the second gear 2222 must mesh with the driving assembly 2210 to obtain power from the driving assembly 2210. The first gear 2221 and the second gear 2222 are arranged coaxially.

[0043] During the operation, the hemorrhoid tissue to be removed is placed in the cavity inside the nail storage assembly of the anorectal electric stapler. The switching fork keeps the switching assembly in a state of being engaged with the first power output assembly. At this time, the switching fork plays a role of insurance. Since it is not engaged with the second power output assembly, the cutting and suturing part is prevented from being accidentally fired during the operation. The firing button assembly is pressed to provide a closing signal to the control circuit, so that the drive assembly outputs power, and the nail anvil assembly moves in a direction close to the nail storage assembly to clamp the hemorrhoid tissue to be removed. Then, the switching switch is toggled to drive the switching fork of the switching assembly through the control circuit to move the switching assembly to a position engaged with the second power output assembly. The firing button assembly is pressed to provide a firing signal to the control circuit, so that the drive assembly outputs power, and the power is transmitted to the second power output assembly, driving the cutting knife of the nail pushing assembly to complete the cutting, and firing the staples to suture the wound surface. After maintaining for a specific time, the control circuit causes the motor of the drive assembly to move in the reverse direction to provide a reverse driving force to retract the cutting knife and the nail pushing assembly. Toggle the switch to drive the switching fork of the switching assembly through the control circuit, and move the switching assembly to a position that engages with the first power output assembly. Press the reset button to provide a reset signal to the control circuit, so that the drive assembly provides a reverse driving force, so that the anvil assembly moves away from the nail storage assembly, the cutting and suturing part opens, and the clamped tissue is released. The anorectal electric stapler is withdrawn.

[0044] Figure 7is a schematic diagram of an electric surgical instrument according to a third embodiment of the present invention. Figure 8 Schematic diagram of the cutting and suturing part of the electric surgical instrument according to the third embodiment of the present invention. The electric surgical instrument according to the third embodiment of the present invention is a tubular electric stapler 300, comprising: a cutting and suturing part 3100 and a handheld part 3200. The cutting and suturing part 3100 can achieve the clamping, cutting and suturing of the severed digestive tract tissue, and realize the connection of the severed digestive tract tissue. The cutting and suturing part 3100 includes a nail anvil assembly 3110 and a nail storage assembly 3120. The nail anvil assembly 3110 includes an annular nail support 3111 and an anvil rod 3112. The nail storage assembly 3120 includes a nail storage assembly housing 3121, a nail push assembly (not shown), an annular nail magazine 3123, a nail anvil driving member 3124 and an annular cutting knife 3125. Staples (not shown) are arranged in the annular nail magazine 3123. The anvil driving member 3124 is detachably connected to the anvil assembly, and the anvil driving member 3124 drives the anvil assembly 3110 to achieve axial forward and backward displacement in the axial direction, thereby clamping and releasing the tissue.

[0045] The handheld part 3200 includes: a driving component 3210, a switching component 3220, a first power output component 3230, a second power output component 3240, a power supply component 3250, a control circuit 3260 and a housing 3270. The power supply component 3250 provides power for the entire electric surgical instrument, and includes a battery, which can be a disposable battery or a rechargeable battery. The battery can be fixed in the handheld part 3200, or can be detachably arranged in the handheld part 3200. The driving component 3210 includes a driving gear 3212 and a first motor 3211; it can also include a reduction box and / or an encoder used in conjunction with the motor.

[0046] The control circuit 3260 includes a circuit board and circuit elements. The control circuit 3260 includes an input port and an output port, and obtains an input signal through the input port and provides an output signal through the output port. The control circuit 3260 is connected to the driving component 3210 and controls the driving component 3210.

[0047] The housing 3270 can accommodate the driving assembly 3210 , the switching assembly 3220 , the power supply assembly 3250 , and the control circuit 3260 , and can accommodate at least a portion of the first power output assembly 3230 and the second power output assembly 3240 .

[0048] The handheld part 3200 further includes a firing button assembly 3280; the firing button assembly 3280 is connected to the control circuit 3260 and is used to provide a driving signal for driving the tubular electric stapler 300. When the firing button assembly 3280 is pressed, the firing button assembly 3280 provides a nail anvil and nail magazine closing signal or a firing signal to the signal input port of the control circuit 3260, and the output port of the control circuit 3260 outputs a driving signal to the driving assembly 3210, and the driving assembly 3210 outputs power outward, and the power is transmitted to the cutting and suturing part 3100. In the first output mode, the firing button assembly 3280 outputs a nail anvil and nail magazine closing signal through the control circuit 3260, and the power output by the driving assembly 3210 is transmitted to the first power output part 3230, and further transmitted to the nail anvil driving member 3124, so as to pull the nail anvil assembly 3110 and clamp the digestive tract tissue between the nail anvil assembly 3110 and the nail storage assembly 3120. The switch 3285 located on the housing is turned to drive the second motor 3226 through the control circuit 3260, and the second motor 3226 drives the switching fork 3225 through the driving rod 3227 to change the output mode to the second output mode. At this time, the firing button assembly 3280 outputs a firing signal through the control circuit, and the power output by the driving assembly 3210 is transmitted to the second power output part 3240, and further transmitted to the nail pushing assembly, which drives the cutting knife and the nail pushing sheet, and drives the staples in the annular staple cartridge 3123, so as to realize the firing of the cutting and suturing part 3100, and complete the cutting and suturing of the tissue. The firing button assembly 3280 can be arranged on the housing part 3270.

[0049] The handheld part 3200 also includes a reset button 3290. After the cutting and suturing of the tissue is completed, the switching component 3220 is set to switch the output mode back to the first output mode, and the reset button 3290 provides a driving signal through the control circuit 3260 to control the driving component 3210. The power output by the driving component 3210 is transmitted to the anvil driving member 3124 again, so that the anvil component 3110 is away from the nail storage component 3120, so as to release the sutured tissue.

[0050] Fig. 9 is a partial schematic diagram of an electric surgical instrument according to a third embodiment of the present invention; Fig.10 3 is a schematic diagram of a switching assembly of an electric surgical instrument according to a third embodiment of the present invention. The driving assembly 3210 includes a first motor 3211 and a driving gear 3212, and the driving assembly 3210 has a driving shaft 32111. The driving gear 3212 is disposed on the driving shaft 32111 and rotates with the driving shaft 32111. The driving assembly 3210 may also include a reduction box and / or an encoder that are matched with the motor.

[0051] The switching assembly 3220 can be meshed with the driving assembly 3210, and the switching assembly 3220 includes a first gear 3221, a shaft 3222, and an output switching portion. The output switching portion includes: a switching fork 3225, a second motor 3226, and a driving rod 3227. The first gear 3221 is arranged on the shaft 3222 and can rotate around the shaft 3222. The first gear 3222 is meshed with the driving gear 3212 of the driving assembly 3210 to receive the power input of the driving assembly 3210. Since the switching power required by the output switching portion is provided by the second motor 3226, and the switching power is less than the power required for closing the nail magazine and cutting the tissue, the power of the second motor 3226 is less than the power of the first motor 3211.

[0052] The first power output assembly 3230 includes a first power gear 3231, a first rotation drive rod 3232 and a first transmission member 3233. The first power gear 3231 can mesh with the first gear 3221 of the switching assembly 3220. The first rotation drive rod 3232 and the first transmission member 3233 cooperate with each other, so that the first rotation drive rod 3232 can drive the first transmission member 3233 to move substantially in a straight line. The first transmission member 3233 can be connected to the anvil drive member 3124 to achieve power transmission. The anvil drive member 3124 controls the closing and opening of the anvil assembly 3110 and the nail storage assembly 3120 by driving the anvil assembly 3110.

[0053] When the switching switch 3285 located on the housing is toggled to drive the second motor 3226 through the control circuit 3260, the switching fork 3225 pushes the first gear 3221 to the first position, and the first gear 3221 is meshed with the driving gear 3212 and the first power gear 3231 at the same time. Therefore, the power from the driving assembly 3210 is transmitted to the first power output assembly 3230. The power is transmitted from the first transmission member 3233 of the first power output assembly 3230 to the anvil assembly 3110 through the anvil driving member 3124. The first rotating drive rod 3232 is rotatable. The first rotating drive rod 3232 can be a lead screw or a screw rod that is at least partially threaded. The first transmission member 3233 cooperates with the thread of the lead screw or the screw rod. The first transmission member 3233 can be provided with a pin, and the pin moves along the thread of the lead screw or the screw rod, so that the first transmission member 3233 produces a linear motion. The lead screw or the threaded rod can be a speed-changing lead screw or a speed-changing threaded rod. Fig. 9 As shown, the thread of the speed change screw includes a first area and a second area, and the first area is closer to the first power gear 3231 than the second area. The pitch of the first area is greater than the pitch of the second area, thereby providing a fast closing of the nail anvil and nail magazine at the initial stage of closing, and a pressure closing at the end of closing.

[0054] The second power output assembly 3240 includes a second power gear 3241, a second rotation drive rod 3242, and a second transmission member 3243. The second power gear 3241 can mesh with the first gear 3221 of the switching assembly 3220. The second rotation drive rod 3242 cooperates with the second transmission member 3243, and the second transmission member 3243 can be provided with a pin, so that the second rotation drive rod 3242 can drive the second transmission member 3243 to move substantially in a straight line. The second transmission member 3243 can be connected to the nail pushing assembly through the nail pushing drive rod 3244 to achieve power transmission and complete the firing of the cutting knife and the staples.

[0055] The switching switch 3285 located on the housing is toggled to drive the second motor 3226 through the control circuit 3260, so that when the switching fork 3225 pushes the first gear 3221 to the second position, the first gear 3221 is meshed with the driving gear 3212 and the second power gear 3241 at the same time. Therefore, the power from the driving assembly 3210 is transmitted to the second power output assembly 3240. The power is transmitted from the nail pushing driving rod 3244 of the second power output assembly 3240 to the nail pushing assembly of the nail storage assembly 3120. The second rotating driving rod 3242 is rotatable. The second rotating driving rod 3242 can be a screw rod or a screw rod with at least a part of threads. The second transmission member 3243 cooperates with the threads of the screw rod or the screw rod. The second transmission member 3243 can be provided with a pin, and the pin moves along the threads of the screw rod or the screw rod, so that the second transmission member 3243 generates a linear motion.

[0056] The drive shaft 32111 of the drive assembly 3210 is substantially parallel to the shaft 3222 of the switching assembly 3220. Further, the drive shaft 32111 of the drive assembly 3210 is substantially parallel to the first rotation drive rod 3232 of the first power output assembly 3230. Further, the drive shaft 32111 of the drive assembly 3210 is substantially parallel to the second rotation drive rod 3242 of the second power output assembly 3240.

[0057] As shown in the figure, the switching component 3220 in the third embodiment has the same structure as the switching component 1220 in the first embodiment.

[0058] 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 of being engaged with the first power output assembly. At this time, the switching fork plays a role of insurance. Since it is not engaged with the second power output assembly, it prevents the cutting and suturing part from being accidentally fired during the operation. Pressing the firing button assembly provides a closing signal to the control circuit, so that the drive assembly outputs power, and the nail anvil assembly moves in the direction close to the nail storage assembly to clamp the digestive tract tissue to be removed. Then, the switching switch located in the housing is toggled to drive the switching fork through the control circuit to move the switching assembly to a position engaged with the second power output assembly. Pressing the firing button assembly provides a firing signal to the control circuit, so that the drive assembly outputs power, and the power is transmitted to the second power output assembly, driving the cutting knife of the nail pushing assembly to complete the cutting, and the staples suture the wound surface. After maintaining for a specific time, the control circuit causes the motor of the drive assembly to move in the reverse direction to provide a reverse driving force to retract the cutting knife and the nail pushing assembly. The switching switch located on the housing is turned to drive the switching fork through the control circuit, and the switching assembly is moved to a position that is engaged with the first power output assembly. The reset button is pressed to provide a reset signal to the control circuit, so that the drive assembly provides a reverse driving force, so that the anvil assembly moves away from the nail storage assembly, the cutting and suturing part opens, and the clamped tissue is released. The tubular electric stapler is withdrawn.

[0059] Both the tubular stapler and the anorectal stapler need to first drive the anvil assembly to complete the closure of the anvil and staple magazine to achieve tissue clamping; then both need to drive the staple pusher assembly and the cutting knife to complete tissue cutting. The movement processes of the anvil and staple pusher assembly are independent of each other, and both must be driven by two relatively independent driving or transmission structures. Since the switching assembly 3220 in the third embodiment has the same structure as the switching assembly 1220 in the first embodiment, the switching assembly in the second embodiment of the present invention can also be used for an electric tubular stapler.

[0060] The present invention provides an electric surgical instrument that can achieve smooth cutting and effective suturing of tissues. The electric surgical instrument provided by the present invention achieves closing, firing and resetting of a stapler assembly through a first motor. It can improve surgical efficiency and reduce the impact of human operation. It can achieve stable cutting of the cutting assembly and effective suturing of staples. It can reduce postoperative bleeding and speed up patient recovery. It reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, the initial driving state is set by the second motor, forming a safety structure to prevent misfiring. The present invention provides an electric surgical instrument that uses a high-power motor to smoothly fire the stapler assembly. The present invention provides an electric surgical instrument that uses a high-power motor to achieve closing, firing and resetting of the stapler assembly; and uses a low-power motor to achieve switching of drive modes.

[0061] The above is an explanation of the preferred implementation of the present invention, but it cannot be understood as a limitation of the claims. The present invention is not limited to the above implementation, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. An electric surgical instrument, characterized in that: The electric surgical instrument comprises: A cutting and suturing section, the cutting and suturing section comprising a nail anvil assembly and a nail storage assembly; the nail anvil assembly comprises an annular nail support; the nail storage assembly comprises a nail storage assembly housing, an annular cutting knife, a nail pushing assembly and an annular nail magazine; and A handheld part, the handheld part comprising: Power supply components; a drive assembly including a drive gear and a first motor; A switching assembly, wherein the switching assembly can be engaged with the driving assembly to obtain power input; the switching assembly comprises a shaft, a first gear and an output switching part; the first gear is arranged on the shaft and is engaged with the driving gear of the driving assembly; the output switching part comprises a second motor, a driving rod and a switching fork, the second motor can drive the switching fork through the driving rod to switch the position of the first gear; the switching fork is coupled with the first gear; the switching assembly is engaged with the driving gear of the driving assembly; the switching fork can make the switching assembly in the first output mode or the second output mode; The first power output assembly comprises a first power gear, a first rotation drive rod and a first transmission member; the first power gear is fixedly connected to the first rotation drive rod, so that the first power gear and the first rotation drive rod can rotate synchronously; the first rotation drive rod and the first transmission member cooperate with each other, so that the first rotation drive rod can drive the first transmission member to move along the first rotation drive rod; the first rotation drive rod is a screw rod or a threaded rod; The second power output assembly comprises a second power gear, a second rotation drive rod and a second transmission member; the second power gear is fixedly connected to the second rotation drive rod, so that the second power gear and the second rotation drive rod can rotate synchronously; the second rotation drive rod cooperates with the second transmission member, so that the second rotation drive rod can drive the second transmission member to move along the second rotation drive rod; the second rotation drive rod is a screw rod or a threaded rod; a control circuit, the control circuit connecting the driving component and the switching component and controlling the driving component and the switching component; and Shell, In the first output mode, the first gear is meshed with the driving gear and the first power gear of the first power output assembly at the same time; In the second output mode, the first gear is meshed with the driving gear and the second power gear of the second power output assembly at the same time.

2. An electric surgical instrument, characterized in that: The electric surgical instrument comprises: A cutting and suturing section, the cutting and suturing section comprising a nail anvil assembly and a nail storage assembly; the nail anvil assembly comprises an annular nail support; the nail storage assembly comprises a nail storage assembly housing, an annular cutting knife, a nail pushing assembly and an annular nail magazine; and A handheld part, the handheld part comprising: Power supply components; a drive assembly including a drive gear and a first motor; A switching assembly, wherein the switching assembly can be engaged with the driving assembly to obtain power input; the switching assembly comprises a shaft, a first gear and an output switching part; the first gear is arranged on the shaft and is engaged with the driving gear of the driving assembly; the output switching part comprises a second motor, a driving rod and a switching fork, the second motor can drive the switching fork through the driving rod to switch the position of the first gear; the switching fork is coupled with the first gear; the switching assembly is engaged with the driving gear of the driving assembly; the switching fork can make the switching assembly in the first output mode or the second output mode; The first power output assembly comprises a first power gear, a first rotation drive rod and a first transmission member; the first power gear is fixedly connected to the first rotation drive rod, so that the first power gear and the first rotation drive rod can rotate synchronously; the first rotation drive rod and the first transmission member cooperate with each other, so that the first rotation drive rod can drive the first transmission member to move along the first rotation drive rod; the first rotation drive rod is a screw rod or a threaded rod; The second power output assembly comprises a second power gear, a second rotation drive rod and a second transmission member; the second power gear is fixedly connected to the second rotation drive rod, so that the second power gear and the second rotation drive rod can rotate synchronously; the second rotation drive rod cooperates with the second transmission member, so that the second rotation drive rod can drive the second transmission member to move along the second rotation drive rod; the second rotation drive rod is a screw rod or a threaded rod; a control circuit, the control circuit connecting the driving component and the switching component and controlling the driving component and the switching component; and Shell, The switching assembly further comprises a second gear disposed on the shaft, the second gear being connected to the first gear and being capable of rotating simultaneously; In the first output mode, the second gear is meshed with the first power gear of the first power output assembly; In the second output mode, the second gear is meshed with the second power gear of the second power output assembly.

3. An electric surgical instrument, characterized in that: The electric surgical instrument comprises: A cutting and suturing section, the cutting and suturing section comprising a nail anvil assembly and a nail storage assembly; the nail anvil assembly comprises an annular nail support; the nail storage assembly comprises a nail storage assembly housing, an annular cutting knife, a nail pushing assembly and an annular nail magazine; and A handheld part, the handheld part comprising: Power supply components; a drive assembly including a drive gear and a first motor; A switching assembly, wherein the switching assembly can be engaged with the driving assembly to obtain power input; the switching assembly comprises a shaft, a first gear and an output switching part; the first gear is arranged on the shaft and is engaged with the driving gear of the driving assembly; the output switching part comprises a second motor, a driving rod and a switching fork, the second motor can drive the switching fork through the driving rod to switch the position of the first gear; the switching fork is coupled with the first gear; the switching assembly is engaged with the driving gear of the driving assembly; the switching fork can make the switching assembly in the first output mode or the second output mode; The first power output assembly comprises a first power gear, a first rotation drive rod and a first transmission member; the first power gear is fixedly connected to the first rotation drive rod, so that the first power gear and the first rotation drive rod can rotate synchronously; the first rotation drive rod and the first transmission member cooperate with each other, so that the first rotation drive rod can drive the first transmission member to move along the first rotation drive rod; the first rotation drive rod is a screw rod or a threaded rod; The second power output assembly comprises a second power gear, a second rotation drive rod and a second transmission member; the second power gear is fixedly connected to the second rotation drive rod, so that the second power gear and the second rotation drive rod can rotate synchronously; the second rotation drive rod cooperates with the second transmission member, so that the second rotation drive rod can drive the second transmission member to move along the second rotation drive rod; the second rotation drive rod is a screw rod or a threaded rod; a control circuit, the control circuit connecting the driving component and the switching component and controlling the driving component and the switching component; and Shell, The switching assembly further comprises a second gear disposed on the shaft, the second gear being connected to the first gear and being capable of rotating simultaneously; In the first output mode, one of the first gear and the second gear is meshed with the first power gear of the first power output assembly; In the second output mode, the other of the first gear and the second gear is meshed with the second power gear of the second power output assembly.

4. The electric surgical instrument according to any one of claims 1 to 3, characterized in that: The handheld portion of the electric surgical instrument also includes a firing button assembly, which is connected to the control circuit and is used to provide a signal for controlling the movement of the drive assembly.

5. The electric surgical instrument according to any one of claims 1 to 3, characterized in that: The handheld portion of the electric surgical instrument further includes a reset button, which is connected to the control circuit and is used to provide a signal for controlling the movement of the drive assembly.

6. The electric surgical instrument according to any one of claims 1 to 3, characterized in that: The handheld part of the electric surgical instrument also includes a switching switch, which is connected to the control circuit and is used to provide a signal for controlling the movement of the switching component.

7. The electric surgical instrument according to any one of claims 1 to 3, characterized in that: The electric surgical instrument is an anorectal stapler or a tubular stapler.

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