Single motor electric surgical instruments

Abstract

The present invention relates to a single-motor electric surgical instrument. The single-motor electric surgical instrument comprises: a cutting and suturing part and a handheld part, the cutting and suturing part comprises a nail anvil assembly and a nail storage assembly; the handheld part comprises: a power supply assembly, a driving assembly and a switching assembly; the switching assembly comprises a shaft, an output switching part and a plurality of gear assemblies; the gear assembly is meshed with the driving gear of the driving assembly; turning the output switching part can put the switching assembly in a first output mode or a second output mode. The single-motor electric surgical instrument provided by the present invention realizes the closing and firing of the surgical instrument through a single motor. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. At the same time, by setting the initial driving state, a safety structure is formed to prevent accidental firing.

Description

Technical Field

[0001] The invention relates to a medical surgical instrument, in particular to a single-motor electric surgical instrument, which has 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 a single-motor electric surgical instrument, which can realize tissue cutting and staple firing by motor drive. The present invention provides a single-motor electric surgical instrument, which can smoothly fire staples. The present invention provides a single-motor electric surgical instrument, which can realize the closing, firing and release of the stapler by a single motor. The present invention provides a single-motor electric surgical instrument, which can realize smooth cutting of tissue and effective suturing. The above-mentioned single-motor electric surgical instrument reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, by setting the initial driving state, a safety structure to prevent accidental firing is formed.

[0006] The present invention provides a single-motor electric surgical instrument, characterized in that the single-motor 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 motor; a switching assembly, the switching assembly can be engaged with the driving assembly to obtain power input; the switching assembly comprises a shaft, an output switching part and a plurality of gear assemblies; the gear assembly is engaged with the driving gear of the driving assembly; a dial The output switching part can make the switching component be in the first output mode or the second output mode; the first power output component, when the switching component is in the first output mode, one of the multiple gear components of the switching component is meshed with the gear component of the first power output component; the second power output component, when the switching component is in the second output mode, one of the multiple gear components of the switching component is meshed with the gear component of the second power output component; the second power output component is connected to the push pin component; the control circuit, the control circuit is connected to the drive component and controls the drive component; and the outer shell. The power from the drive component is selectively transmitted to the first power output component or the second power output component through the switching component to realize the selection of the power output path. At the same time, for the two-choice switch, the switching component constitutes a safety structure to prevent the accidental triggering of other transmission structures.

[0007] The multiple 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 part, a first meshing part and a second meshing part; the first gear part is meshed with the driving gear of the driving assembly; the second gear assembly includes a second gear and a third meshing part; the third gear assembly includes a third gear and a fourth meshing part; in the first output mode, the first meshing part of the first gear assembly and the third meshing part of the second gear assembly are meshed with each other, so that the first gear assembly and the second gear assembly can rotate synchronously; the second gear of the second gear assembly is meshed with the first power gear of the first power output assembly; in the second output mode, the second meshing part of the first gear assembly and the fourth meshing part of the third gear assembly are meshed with each other, so that the first gear assembly and the third gear assembly can rotate synchronously; the third gear of the third gear assembly is meshed with the second power gear of the second power output assembly. After the first gear assembly is meshed with the second gear assembly or the third gear assembly, the power from the driving assembly is transmitted to the first power output assembly or the second power output assembly through the second gear assembly or the third gear assembly. The switching of the power transmission path is realized.

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

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

[0010] The first power output assembly includes 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 preferably a screw rod or a threaded rod; the screw rod or threaded rod is preferably a speed-changing screw rod or a speed-changing threaded rod.

[0011] The second power output assembly includes 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 and the second transmission member cooperate with each other 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.

[0012] The single-motor electric surgical instrument also includes a firing button assembly, which is connected to the control circuit and is used to provide a signal to control the movement of the drive assembly.

[0013] The single-motor 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.

[0014] The single-motor electric surgical instrument according to any one of the aforementioned items is characterized in that the single-motor electric surgical instrument is an anorectal stapler or a tubular stapler.

[0015] The present invention provides a single-motor electric surgical instrument, which can achieve smooth cutting and effective suturing of tissues, reduce postoperative bleeding, and accelerate patient recovery. The present invention provides a single-motor electric surgical instrument, which can achieve closing, firing and releasing of a stapler through a single motor. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. At the same time, by setting the initial driving state, a safety structure is formed to prevent accidental firing.

[0016] Instruction Manual

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

[0018] Figure 2 is a disassembled schematic diagram of a cutting and suturing portion of a single-motor electric surgical instrument according to a first embodiment of the present invention;

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

[0020] Figure 4 is a schematic diagram of a single-motor electric surgical instrument switching assembly according to a first embodiment of the present invention;

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

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

[0023] Figure 7 is a schematic diagram of a single-motor electric surgical instrument switching assembly according to a second embodiment of the present invention;

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

[0025] Fig. 9 is a schematic diagram of a single-motor electric surgical instrument switching assembly according to a third embodiment of the present invention;

[0026] Fig.10 is a schematic diagram of a single-motor electric surgical instrument according to a fourth embodiment of the present invention;

[0027] Fig.11is a schematic diagram of a cutting and suturing portion of a single-motor electric surgical instrument according to a fourth embodiment of the present invention;

[0028] Fig.12 is a partial schematic diagram of a single-motor electric surgical instrument according to a fourth embodiment of the present invention;

[0029] Fig.13 is a schematic diagram of a single-motor electric surgical instrument switching assembly according to a fourth embodiment of the present invention;

[0030] Fig.14 It is a schematic diagram of the disassembly of a part of the switching component according to the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0031] Figure 1 is a schematic diagram of a single-motor 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 single-motor electric surgical instrument according to the first embodiment of the present invention. Figure 1 The 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, comprising: 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 release 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 .

[0032] 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 motor 1211; it can also include a reduction box and / or an encoder used in conjunction with the motor.

[0033] 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.

[0034] 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 .

[0035] The handheld part 1200 further includes a firing button assembly 1280; the firing button assembly 1280 is connected to the control circuit 1260 and is used to provide a driving signal for driving the anorectal electric stapler 100. When the firing button assembly 1280 is pressed, the firing button assembly 1280 provides a nail 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 driving assembly 1210, and the driving 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 a nail anvil and nail magazine closing signal through the control circuit 1260, and the power output by the driving assembly 1210 is transmitted to the first power output part 1230, and further transmitted to the nail anvil driving member 1112, so as to pull the nail anvil assembly 1110 and clamp the tissue to be cut between the nail anvil assembly 1110 and the nail storage assembly 1120. Then, the switching component 1220 is set to change the output mode to the second output mode. At this time, the firing button component 1280 outputs a firing signal through the control circuit, and the power output by the driving component 1210 is transmitted to the second power output part 1240, and further transmitted to the nail pushing component 1122. The nail pushing component 1122 drives the cutting knife and the nail pushing sheet, and drives the staples in the annular staple cartridge 1123 to achieve the firing of the cutting and suturing part 1100, and complete the cutting and suturing of the tissue. The firing button component 1280 can be set on the housing part 1270.

[0036] The handheld part 1200 also includes a reset button 1290. After the cutting and suturing of the tissue is completed, the switching component 1220 is set to switch the output mode back to the first output mode, and the reset button 1290 provides a driving signal through the control circuit 1260 to control the driving component 1210. The power output by the driving component 1210 is transmitted to the nail anvil driving member 1112 again, so that the nail anvil component 1110 is away from the nail storage component 1120, and the sutured tissue is released.

[0037] Figure 3 is a partial schematic diagram of a single-motor electric surgical instrument according to a first embodiment of the present invention; Figure 4 is a schematic diagram of a single-motor electric surgical instrument switching assembly according to a first embodiment of the present invention; Figure 5 1 is a disassembled schematic diagram of a part of the switching assembly according to the first embodiment of the present invention. The driving assembly 1210 includes a motor 1211 and a driving gear 1212, and the driving assembly 1210 has a driving shaft 12111. The driving gear is arranged 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 matched with the motor.

[0038] The switching assembly 1220 can mesh with the driving 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 a switching fork 1225. The first gear assembly 1221, the second gear assembly 1222, and the third gear assembly 1223 are arranged on the shaft 1224 and can rotate around the shaft 1224. The first gear assembly 1221 includes a first gear portion 12211, a first meshing portion 12212, and a second meshing portion 12213. The first gear portion 12211 meshes with the driving gear 1212 of the driving assembly 1210 to receive the power input of the driving assembly 1210. The second gear assembly 1222 includes a second gear portion 12221 and a third meshing portion 12222; the third gear assembly 1223 includes a third gear portion 12231 and a fourth meshing portion 12232. The meshing portion may be a gear meshing portion or a spline meshing portion.

[0039] The first meshing portion 12212 of the first gear assembly 1221 can mesh with the third meshing portion 12222 of the second gear assembly 1222, so that the first gear assembly 1221 and the second gear assembly 1222 can rotate synchronously; the second meshing portion 12213 of the first gear assembly 1221 can mesh with the fourth meshing portion 12232 of the third gear assembly 1223, so that the first gear assembly 1221 and the third gear assembly 1223 can rotate synchronously. The first gear assembly 1221 can be switched between at least two positions by shifting the shift fork 1225. When the shift fork 1225 pushes the first gear assembly 1221 to the first position, the first meshing portion 12212 of the first gear assembly 1221 and the third meshing portion 12222 of the second gear assembly 1222 mesh with each other, so 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 meshing portion 12213 of the first gear assembly 1221 meshes with the fourth meshing portion 12232 of the third gear assembly 1223, so that the first gear assembly 1221 and the third gear assembly 1223 can rotate synchronously.

[0040] Based on the above structure, the switching component 1220 realizes that the power input obtained from the driving component 1210 is output to other components through the second gear component 1222 and the third gear component 1223 in a switchable manner. The first gear component 1221, the second gear component 1222 and the third gear component 1223 are arranged coaxially. Figure 1 2 shows a specific gear diameter relationship of the gear assembly, but this is not a limitation on the gear diameter relationship, and the gear diameter relationship can be appropriately adjusted according to the transmission ratio.

[0041] 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 second gear assembly 1222 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 1120.

[0042] When the switching fork 1225 pushes the first gear assembly 1221 to the first position, the first meshing portion 12212 of the first gear assembly 1221 meshes with the third meshing portion 12222 of the second gear assembly 1222, so that the first gear assembly 1221 and the second gear assembly 1222 can rotate synchronously. Since the second gear portion 12221 of the second gear assembly 1222 is in meshing state with the first power gear 1231 of the first power output assembly 1230, the power from the driving assembly 1210 is transmitted to the first power output assembly 1230. The first rotating drive rod 1232 is rotatable. The first rotating drive rod 1232 can be a screw rod or a threaded rod that is at least partially threaded. The first transmission member 1233 cooperates with the thread of the screw rod or the threaded rod. The first transmission member 1233 may be provided with a pin, and the pin moves along the thread of the screw rod or the threaded rod, so that the first transmission member 1233 produces a linear motion. 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.

[0043] 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 third gear assembly 1223 of the switching assembly 1220. The second rotation drive rod 1242 and the second transmission member 1243 cooperate with each other, 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.

[0044] When the shift fork 1225 pushes the first gear assembly 1221 to the second position, the first gear assembly 1221 and the third gear assembly 1223 are meshed with each other through the second meshing portion 12213 and the fourth meshing portion 12232, and the third gear portion 12231 of the third gear assembly 1223 is in meshing state 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. The power is transmitted from the second power output assembly 1240 to the pin pushing assembly 1122 of the cutting and suturing part 1100. The second rotating drive rod 1242 is rotatable. The second rotating drive rod 1242 can be a screw rod or a threaded rod that is at least partially threaded. The second transmission member 1243 cooperates with the thread of the screw rod or the threaded 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 threaded rod, so that the second transmission member 1243 generates a linear motion. The screw rod or threaded rod may be a speed-changing screw rod or a speed-changing threaded rod.

[0045] 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 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.

[0046] Figure 6 is a partial schematic diagram of a single-motor electric surgical instrument according to a second embodiment of the present invention; Figure 72 is a schematic diagram of a switching assembly of a single-motor electric surgical instrument according to a second embodiment of the present invention. The switching assembly 2220 can be meshed with the driving assembly 2210, and the switching assembly 2220 includes a first gear assembly 2221, a second gear assembly 2222, a third gear assembly 2223, a shaft 2224 and a switching fork 2225; 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 connected to each other and are arranged on the shaft 2224. The first gear assembly 2221, the second gear assembly 2222 and the third gear assembly 2223 can rotate simultaneously. The first gear assembly 2221 includes a first gear; the second gear assembly 2222 includes a second gear; and the third gear assembly 2223 includes a third gear. The first gear assembly 2221 meshes with the driving gear 2212 of the driving assembly 2210 to receive the power input of the driving assembly 2210. The first gear assembly 2221 can be switched between at least two positions by toggling the switching fork 2225. When the switching fork 2225 pushes the first gear assembly 2221 to the first position, the second gear assembly 2222 is in meshing state with the first power gear portion 2231 of the first power output assembly 2230; the third gear assembly 2223 is separated from the second power output assembly 2240; and the power from the driving assembly 2210 is delivered to the first power output assembly 2230. When the switching fork 2225 pushes the first gear assembly 2221 to the second position, the third gear assembly 2223 is meshing with the second power gear portion 2241 of the second power output assembly 2240, and the second gear assembly 2222 is separated from the first power output assembly 2230; and the power from the driving assembly 2210 is delivered to the second power output assembly 2240.

[0047] 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 component 2222 and the third gear component 2223. The first gear component 2221, the second gear component 2222 and the third gear component 2223 are coaxially arranged.

[0048] Figure 8 is a partial schematic diagram of a single-motor electric surgical instrument according to a third embodiment of the present invention; Fig. 932 is a schematic diagram of a switching assembly of a single-motor electric surgical instrument according to a third embodiment of the present invention. The switching assembly 3220 can mesh with the driving assembly 3210, and the switching assembly 3220 includes a first gear assembly 3221, a second gear assembly 3222, a third gear assembly 3223, a shaft 3224, and a switching fork 3225; the second gear assembly 3222 and the third gear assembly 3223 are located on the same side of the first gear assembly 3221, although Figure 8 It is only listed that the second gear assembly 3222 is located between the first gear assembly 3221 and the third gear assembly 3223; in actual situations, the third gear assembly 3223 may also be located between the first gear assembly 3221 and the second gear assembly 3222. The first gear assembly 3221, the second gear assembly 3222 and the third gear assembly 3223 are connected to each other and are arranged on the shaft 3224; the second gear assembly 3222 and the third gear assembly 3223 may be directly fixedly connected, and the first gear assembly may be connected to the second gear assembly 3222 through a connecting cylinder 3226. The first gear assembly 3221, the second gear assembly 3222 and the third gear assembly 3223 can rotate simultaneously. The first gear assembly 3221 includes a first gear; the second gear assembly 3222 includes a second gear; and the third gear assembly 3223 includes a third gear. The first gear assembly 3221 is meshed with the driving gear 3212 of the driving assembly 3210 to receive the power input of the driving assembly 3210. The first gear assembly 3221 can be switched between at least two positions by toggling the switching fork 3225. When the switching fork 3225 pushes the first gear assembly 3221 to the first position, the second gear assembly 3222 is in meshing state 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 delivered 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 meshing 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; and the power from the driving assembly 3210 is delivered to the second power output assembly 3240.

[0049] Based on the above structure, the switching assembly 3220 realizes outputting the power input obtained from the driving assembly 3210 to other components in a switchable manner through the second gear assembly 3222 and the third gear assembly 3223. The first gear assembly 3221, the second gear assembly 3222 and the third gear assembly 3223 are arranged coaxially.

[0050] 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 fork is toggled 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 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 fork is toggled to move the switching assembly to a position engaged with the first power output assembly. Pressing the reset button provides a reset signal to the control circuit, causing the drive assembly to provide a reverse driving force, causing the anvil assembly to move away from the nail storage assembly, the cutting and suturing part to open, and the clamped tissue to be released. The stapler is then withdrawn.

[0051] Fig.10 is a schematic diagram of a single-motor electric surgical instrument according to a fourth embodiment of the present invention; Fig.11 Schematic diagram of the cutting and suturing section of a single-motor 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, comprising: a cutting and suturing section 4100 and a handheld section 4200. The cutting and suturing section 4100 can achieve the clamping, cutting and suturing of the severed digestive tract tissue, and achieve the connection of the severed digestive tract tissue. The cutting and suturing section 4100 includes a nail anvil assembly 4110 and a nail storage assembly 4120. The nail anvil assembly 4110 includes an annular nail support 4111 and an anvil rod 4112. The nail storage assembly 4120 includes a nail storage assembly housing 4121, a nail push assembly (not shown), an annular nail magazine 4123, a nail anvil driving member 4124 and an annular cutting knife 4125. Staples (not shown) are arranged in the annular nail magazine 4123. The anvil driving member 4124 is detachably connected to the anvil assembly, and the anvil driving member 4124 drives the anvil assembly 4110 to achieve axial forward and backward displacement in the axial direction, thereby clamping and releasing the tissue.

[0052] The handheld part 4200 includes: a driving component 4210, a switching component 4220, a first power output component 4230, a second power output component 4240, a power supply component 4250, a control circuit 4260 and a housing 4270. The power supply component 4250 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 4200, or can be detachably arranged in the handheld part 4200. The driving component 4210 includes a driving gear 4212 and a motor 4211; it can also include a reduction box and / or an encoder used in conjunction with the motor.

[0053] The control circuit 4260 includes a circuit board and circuit elements. The control circuit 4260 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 4260 is connected to the driving component 4210 and controls the driving component 4210.

[0054] The housing 4270 can accommodate the driving assembly 4210 , the switching assembly 4220 , the power supply assembly 4250 , and the control circuit 4260 , and can accommodate at least a portion of the first power output assembly 4230 and the second power output assembly 4240 .

[0055] The handheld part 4200 further includes a firing button assembly 4280; the firing button assembly 4280 is connected to the control circuit 4260 and is used to provide a driving signal for driving the tubular electric stapler 400. When the firing button assembly 4280 is pressed, the firing button assembly 4280 provides a nail anvil and nail magazine closing signal or a firing signal to the signal input port of the control circuit 4260, and the output port of the control circuit 4260 outputs a driving signal to the driving assembly 4210, and the driving assembly 4210 outputs power outward, and the power is transmitted to the cutting and suturing part 4100. In the first output mode, the firing button assembly 4280 outputs a nail anvil and nail magazine closing signal through the control circuit 4260, and the power output by the driving assembly 4210 is transmitted to the first power output part 4230, and further transmitted to the nail anvil driving member 4122, so as to pull the nail anvil assembly 4110 and clamp the digestive tract tissue between the nail anvil assembly 4110 and the nail storage assembly 4120. Then, a switching component 4220 is set to change the output mode to the second output mode, at which time the firing button component 4280 outputs a firing signal through the control circuit, and the power output by the driving component 4210 is transmitted to the second power output part 4240, and further transmitted to the nail pushing component, which drives the cutting knife 4125 and the nail pushing sheet, and drives the staples in the annular staple cartridge 4123, so as to realize the firing of the cutting and suturing part 4100, and complete the cutting and suturing of the tissue. The firing button component 4280 can be set on the housing part 4270.

[0056] The handheld part 4200 also includes a reset button 4290. After the cutting and suturing of the tissue is completed, the switching component 4220 is set to switch the output mode back to the first output mode, and the reset button 4290 provides a driving signal through the control circuit 4260 to control the driving component 4210. The power output by the driving component 4210 is transmitted to the nail anvil driving member 4122 again, so that the nail anvil component 4110 is away from the nail storage component 4120, so as to release the sutured tissue.

[0057] Fig.12 is a partial schematic diagram of a single-motor electric surgical instrument according to a first embodiment of the present invention; Fig.13 is a schematic diagram of a single-motor electric surgical instrument switching assembly according to a first embodiment of the present invention; Fig.14 4 is a disassembled schematic diagram of a part of the switching assembly according to the first embodiment of the present invention. The driving assembly 4210 includes a motor 4211 and a driving gear 4212, and the driving assembly 4210 has a driving shaft 42111. The driving gear is arranged on the driving shaft 42111 and rotates with the driving shaft 42111. The driving assembly 4210 may also include a reduction box and / or an encoder matched with the motor.

[0058] The switching assembly 4220 can mesh with the driving assembly 4210, and the switching assembly 4220 includes a first gear assembly 4221, a second gear assembly 4222, a third gear assembly 4223, a shaft 4224, and a switching fork 4225. The first gear assembly 4221, the second gear assembly 4222, and the third gear assembly 4223 are arranged on the shaft 4224 and can rotate around the shaft 4224. The first gear assembly 4221 includes a first gear portion 42211, a first meshing portion 42242, and a second meshing portion 42213. The first gear portion 42211 meshes with the driving gear 4212 of the driving assembly 4210 to receive the power input of the driving assembly 4210. The second gear assembly 4222 includes a second gear portion 42221 and a third meshing portion 42222; the third gear assembly 4223 includes a third gear portion 42231 and a fourth meshing portion 42232. The meshing portion may be a gear meshing portion or a spline meshing portion.

[0059] The first meshing portion 42242 of the first gear assembly 4221 can mesh with the third meshing portion 42222 of the second gear assembly 4222, so that the first gear assembly 4221 and the second gear assembly 4222 can rotate synchronously; the second meshing portion 42213 of the first gear assembly 4221 can mesh with the fourth meshing portion 42232 of the third gear assembly 4223, so that the first gear assembly 4221 and the third gear assembly 4223 can rotate synchronously. The first gear assembly 4221 can be switched between at least two positions by shifting the shift fork 4225. When the shift fork 4225 pushes the first gear assembly 4221 to the first position, the first meshing portion 42242 of the first gear assembly 4221 meshes with the third meshing portion 42222 of the second gear assembly 4222, so that the first gear assembly 4221 and the second gear assembly 4222 can rotate synchronously. When the shift fork 4225 pushes the first gear assembly 4221 to the second position, the second meshing portion 42213 of the first gear assembly 4221 meshes with the fourth meshing portion 42232 of the third gear assembly 4223, so that the first gear assembly 4221 and the third gear assembly 4223 can rotate synchronously.

[0060] Based on the above structure, the switching component 4220 realizes that the power input obtained from the driving component 4210 is output to other components through the second gear component 4222 and the third gear component 4223 in a switchable manner. The first gear component 4221, the second gear component 4222 and the third gear component 4223 are arranged coaxially. Figure 1 2 shows a specific gear diameter relationship of the gear assembly, but this is not a limitation on the gear diameter relationship, and the gear diameter relationship can be appropriately adjusted according to the transmission ratio.

[0061] The first power output assembly 4230 includes a first power gear 4231, a first rotation drive rod 4232 and a first transmission member 4233; the first power gear 4231 can mesh with the second gear assembly 4222 of the switching assembly 4220. The first rotation drive rod 4232 and the first transmission member 4233 cooperate with each other, so that the first rotation drive rod 4232 can drive the first transmission member 4233 to move substantially in a straight line. The first transmission member 4233 can be connected to the anvil drive member 4124 to achieve power transmission. The anvil drive member 4124 drives the anvil assembly 4110 to control the closing and opening of the anvil assembly 4110 and the nail storage assembly 4120.

[0062] When the switching fork 4225 pushes the first gear assembly 4221 to the first position, the first meshing portion 42242 of the first gear assembly 4221 meshes with the third meshing portion 42222 of the second gear assembly 4222, so that the first gear assembly 4221 and the second gear assembly 4222 can rotate synchronously. Since the second gear portion 42221 of the second gear assembly 4222 is in meshing state with the first power gear 4231 of the first power output assembly 4230, the power from the driving assembly 4210 is transmitted to the first power output assembly 4230. The first rotating drive rod 4232 is rotatable. The first rotating drive rod 4232 can be a screw rod or a threaded rod that is at least partially threaded. The first transmission member 4233 cooperates with the thread of the screw rod or the threaded rod. The first transmission member 4233 may be provided with a pin, and the pin moves along the thread of the screw rod or the threaded rod, so that the first transmission member 4233 produces a linear motion. Fig.12 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 4231 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.

[0063] The second power output assembly 4240 includes a second power gear 4241, a second rotation drive rod 4242, and a second transmission member 4243. The second power gear 4241 can mesh with the third gear assembly 4223 of the switching assembly 4220. The second rotation drive rod 4242 and the second transmission member 4243 cooperate with each other, so that the second rotation drive rod 4242 can drive the second transmission member 4243 to move substantially in a straight line. The second transmission member 4243 can be connected to the nail pushing assembly through the nail pushing drive rod 4244 to achieve power transmission and complete the firing of the cutting knife 4125 and the staples.

[0064] When the shift fork 4225 pushes the first gear assembly 4221 to the second position, the first gear assembly 4221 and the third gear assembly 4223 are meshed with each other, and the third gear portion 42231 of the third gear assembly 4223 is in meshing state 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. The power is transmitted from the second power output assembly 4240 to the pin pushing assembly of the cutting and suturing part 4100. The second rotating drive rod 4242 is rotatable. The second rotating drive rod 4242 can be a screw rod or a threaded rod that is at least partially threaded. The second transmission member 4243 cooperates with the thread of the screw rod or the threaded rod. The second transmission member 4243 can be provided with a pin, and the pin moves along the thread of the screw rod or the threaded rod, so that the second transmission member 4243 generates a linear motion.

[0065] 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 rotation drive rod 4232 of the first power output assembly 4230. Further, the drive shaft 42111 of the drive assembly 4210 is substantially parallel to the second rotation drive rod 4242 of the second power output assembly 4240.

[0066] As shown in the figure, the switching component 4220 in the fourth embodiment has the same structure as the switching component 1220 in the first embodiment.

[0067] 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 fork is toggled 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 set on 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 driving 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 fork is toggled to move the switching assembly to a position that engages 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, causing the anvil assembly to move away from the nail storage assembly, the cutting and suturing part opens, and the clamped tissue is released. The stapler is withdrawn.

[0068] 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 4220 in the fourth embodiment has the same structure as the switching assembly 1220 in the first embodiment, the switching structures 2220 and 3220 in the second and third embodiments of the present invention can also be used for electric tubular staplers.

[0069] The present invention provides a single-motor electric surgical instrument, which can realize tissue cutting and staple firing by motor drive. The single-motor electric surgical instrument can realize the closing, firing and resetting of the stapler by a single motor. The single-motor electric surgical instrument provided by the present invention can smoothly fire staples. It can realize smooth cutting of tissue and effective suturing. It can reduce postoperative bleeding and speed up patient recovery. The present invention adopts a single motor and a switching structure to realize dual driving force output, which reduces the complexity of the structure of the electric surgical instrument and saves costs. At the same time, by setting the initial driving state, a safety structure is formed to prevent accidental firing.

[0070] 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. A single-motor electric surgical instrument, characterized in that: The single-motor 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 motor; A switching assembly, wherein the switching assembly can mesh with the driving assembly to obtain power input; the switching assembly comprises a shaft, an output switching part and a plurality of gear assemblies; the gear assembly meshes with the driving gear of the driving assembly; and the switching assembly can be placed in a first output mode or a second output mode by turning the output switching part; 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; When the switching assembly is in the first output mode, one of the plurality of gear assemblies of the switching assembly is meshed with the gear assembly of the first power output assembly; 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, When the switching assembly is in the second output mode, one of the plurality of gear assemblies of the switching assembly is meshed with the gear assembly of the second power output assembly; the second power output assembly is connected to the push pin assembly; a control circuit, the control circuit being connected to the driving component and controlling the driving component; and Shell, The plurality of gear assemblies of the switching assembly include a first gear assembly, a second gear assembly and a third gear assembly, wherein the first gear assembly, the second gear assembly and the third gear assembly are arranged on the shaft and can rotate around the shaft; the first gear assembly includes a first gear portion, a first meshing portion and a second meshing portion; the first gear portion is meshed with the 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 meshes with the third meshing portion of the second gear assembly, so that the first gear assembly and the second gear assembly can rotate synchronously; the second gear of the second gear assembly meshes with the first power gear of the first power output assembly; In the second output mode, the second meshing portion of the first gear assembly meshes with the fourth meshing portion of the third gear assembly, so that the first gear assembly and the third gear assembly can rotate synchronously; the third gear of the third gear assembly meshes with the second power gear of the second power output assembly.

2. A single-motor electric surgical instrument, characterized in that: The single-motor 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 motor; A switching assembly, wherein the switching assembly can mesh with the driving assembly to obtain power input; the switching assembly comprises a shaft, an output switching part and a plurality of gear assemblies; the gear assembly meshes with the driving gear of the driving assembly; and the switching assembly can be placed in a first output mode or a second output mode by turning the output switching part; 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; When the switching assembly is in the first output mode, one of the plurality of gear assemblies of the switching assembly is meshed with the gear assembly of the first power output assembly; 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, When the switching assembly is in the second output mode, one of the plurality of gear assemblies of the switching assembly is meshed with the gear assembly of the second power output assembly; the second power output assembly is connected to the push pin assembly; a control circuit, the control circuit being connected to the driving component and controlling the driving component; and Shell, 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, the first gear is meshed with the driving gear of the driving assembly; the second gear assembly includes a second gear; the third gear assembly includes a third gear; the first gear, the second gear and the third gear are connected to each other and can rotate simultaneously; In the first output mode, the second gear is meshed with the first power gear of the first power output assembly; In the second output mode, the third gear is meshed with the second power gear of the second power output assembly.

3. The single-motor electric surgical instrument according to claim 2, characterized in that: 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.

4. The single-motor electric surgical instrument according to any one of claims 1 to 3, characterized in that: The first rotation driving rod is a speed change screw rod or a speed change threaded rod.

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

6. The single-motor electric surgical instrument according to any one of claims 1 to 3, characterized in that: The single-motor 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.

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

Images