CN111345865A

CN111345865A - Single-motor electric surgical instrument

Info

Publication number: CN111345865A
Application number: CN201811585216.3A
Authority: CN
Inventors: 李学军; 赵博; 张晋辉; 王洪权; 夏磊磊; 赵延瑞; 代立军; 蒋婷
Original assignee: BEIJING BIOSIS HEALING BIOLOGICAL TECHNOLOGY CO LTD
Current assignee: BEIJING BIOSIS HEALING BIOLOGICAL TECHNOLOGY CO LTD
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2020-06-30

Abstract

The invention relates to a single-motor electric surgical instrument. The single motor powered surgical instrument includes: the cutting and sewing part comprises a nail anvil component and a nail storage component; the hand-held portion includes: the switching device comprises a power supply component, a driving component and a switching component; the switching assembly can be meshed with the driving assembly to obtain power input; the switching assembly comprises a shaft, a first gear and an output switching part; the switching component can be in a first output mode or a second output mode by toggling the output switching part. The electric surgical instrument provided by the 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. Meanwhile, a safety structure for preventing error triggering is formed by setting the initial driving state.

Description

Single-motor electric surgical instrument

Technical Field

The invention relates to a medical surgical operation instrument, in particular to a single-motor electric operation instrument. The electric surgical instrument is provided with an annular nail bin and an annular nail abutting seat, and can be an electric tubular anastomat or an electric anorectal anastomat.

Background

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

The currently used staplers are mainly operated by hand or by electric. In the operation process, the front end of the anastomat is required to clamp the tissue to be cut, and the preparation before firing is well made. For a manually operated stapler, in the process of firing the stapler, a doctor needs to press a handle while holding the stapler in the air to complete firing. In the whole firing process, the hand provides two forces of supporting and pressing, and the shaking of the anastomat caused by the shaking of the hand is easy to occur. For anorectal anastomat and tubular anastomat, although the percussion process is completed by pressing the handle at one time, the handle is pressed by the holding force of human hands, and the problem of uneven force application in the whole percussion process also exists. The final anastomotic nail forming effect is influenced by unstable and uneven manual percussion force application, so that the anastomotic nail forming has defects, and the cutting wound surface of the cutting knife is not smooth.

And to electronic anastomat, the doctor only needs stably to hold the anastomat, makes cutting knife and anastomotic nail move through the button, can realize the steady motion of cutting knife and the steady continuous sewing of anastomotic nail to effectively guaranteed cutting effect.

Disclosure of Invention

The invention provides a single-motor electric surgical instrument which can realize tissue cutting and anastomotic nail firing in a motor-driven mode. The invention provides a single-motor electric surgical instrument which can stably trigger anastomosis nails. The invention provides a single-motor electric surgical instrument which realizes the closing, the firing and the resetting of an anastomat through a single motor. The invention provides a single-motor electric surgical instrument which can realize stable cutting and effective suturing of tissues.

The present invention provides a single motor powered surgical instrument, characterized in that it comprises: the cutting and sewing part comprises a nail anvil assembly and a nail storage assembly; the nail anvil component comprises an annular nail abutting seat; the nail storage assembly comprises a nail storage assembly shell, an annular cutting knife, a nail pushing assembly and an annular nail bin; and a hand-held portion, the hand-held portion including: a power supply component; the driving assembly comprises a driving gear and a motor; the switching assembly can be meshed 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 meshed with the driving gear of the driving assembly; the output switching part is coupled with the first gear; the switching assembly is meshed with the driving gear of the driving assembly; the switching component can be in a first output mode or a second output mode by toggling the output switching part; the first power output assembly comprises a first power gear, a first rotary driving rod and a first transmission piece; the first power gear is fixedly connected with the first rotary driving rod, so that the first power gear and the first rotary driving rod can synchronously rotate; the first rotary driving rod is matched with the first transmission piece, so that the first rotary driving rod can drive the first transmission piece to move along the first rotary driving rod; the first rotary driving rod is preferably a screw rod or a threaded rod; the second power output assembly comprises a second power gear, a second rotary driving rod and a second transmission piece; the second power gear is fixedly connected with the second rotary driving rod, so that the second power gear and the second rotary driving rod can synchronously rotate; the second rotary driving rod is matched with the second transmission piece, so that the second rotary driving rod can drive the second transmission piece to move along the second rotary driving rod; the second rotary driving rod is preferably a screw rod or a threaded rod; the control circuit is connected with the driving assembly and controls the driving assembly; and a housing portion. The power from the driving assembly is selectively transmitted to the first power output assembly or the second power output assembly through the switching assembly, and the power output path is selected. Meanwhile, for the switching of the alternative, a safety structure formed by the switching assembly prevents other transmission structures from being triggered by mistake.

In the first output mode, the first gear is simultaneously meshed with the drive gear and a first power gear of the first power output assembly; in the second output mode, the first gear is simultaneously meshed with the drive gear and a second power gear of the second power output assembly. After the first gear assembly is meshed with the first power gear or the second power gear, 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. The switching of the power transmission path is realized.

The switching assembly further comprises a second gear arranged on the shaft, the second gear is connected with the first gear and can rotate simultaneously; in the first output mode, the second gear is in mesh with a first power gear of the first power output assembly; in the second output mode, the second gear is in mesh with a second power gear of the second power output assembly. Different structures are provided, and the power is directly output to the first power output assembly or the second power output assembly through the second gear.

The switching assembly further comprises a second gear arranged on the shaft, the second gear is connected with the first gear and can rotate simultaneously; in the first output mode, one of the first gear and the second gear is in mesh with a 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 in mesh with a second power gear of the second power output assembly.

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

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

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

The invention provides a single-motor electric surgical instrument which can realize stable cutting and effective suturing of tissues. Reduce postoperative bleeding and accelerate the recovery of patients. The invention provides a single-motor electric surgical instrument which can realize the closing, the firing and the resetting of an anastomat through a single motor. The complexity of the structure of the electric surgical instrument is reduced, and the cost is saved. Meanwhile, a safety structure for preventing error triggering is formed by setting the initial driving state.

Drawings

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

FIG. 2 is a disassembled schematic view of the cutting and stapling portion of the single motor electro-surgical instrument according to the first embodiment of the present invention;

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

FIG. 4 is a schematic view of the single motor electro-surgical instrument switching assembly in accordance with the first embodiment of the present invention;

FIG. 5 is a partial schematic view of a single motor powered surgical instrument according to a second embodiment of the present invention;

FIG. 6 is a schematic view of a switching assembly of the single motor powered surgical instrument according to a second embodiment of the present invention;

FIG. 7 is a schematic view of a single motor, powered surgical instrument according to a third embodiment of the present invention.

FIG. 8 is a schematic view of a cutting and stapling portion of a single motor electro-surgical instrument according to a third embodiment of the present invention;

FIG. 9 is a partial schematic view of a single motor powered surgical instrument according to a third embodiment of the present invention;

FIG. 10 is a schematic view of a single motor electro-surgical instrument switching assembly according to a third embodiment of the present invention.

Detailed Description

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

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

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

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

The hand-held portion 1200 also includes a firing button assembly 1280; the firing button assembly 1280 is connected to the control circuit 1260 and is configured to provide a driving signal for driving the anorectal electric stapler 100. When the firing button assembly 1280 is pressed, the firing button assembly 1280 provides an anvil staple cartridge closing signal or a firing signal to the signal input port of the control circuit 1260, the output port of the control circuit 1260 outputs a signal to the driving assembly 1210, the driving assembly 1210 outputs power outwards, and the power is transmitted to the cutting and suturing part 1100. In the first output mode, the firing button assembly 1280 outputs an anvil cartridge closing signal through the control circuit 1260, and the power output by the driving assembly 1210 is transmitted to the first power output portion 1230 and further transmitted to the anvil driving member 1112, so as to pull the anvil assembly 1110 and clamp the tissue to be cut between the anvil assembly 1110 and the staple storage assembly 1120. Then, a switching assembly 1220 is arranged to change the output mode into a second output mode, at this time, the firing button assembly 1280 outputs a firing signal through the control circuit, the power output by the driving assembly 1210 is transmitted to the second power output portion 1240 and further transmitted to the staple pushing assembly 1122, the staple pushing assembly 1122 drives the cutting knife and the staple pushing piece and drives the staples in the annular staple cartridge 1123, so as to achieve the firing of the cutting and suturing portion 1100, and complete the cutting and suturing of the tissue. The firing button assembly 1280 can be disposed on the housing portion 1270.

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

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

A switching assembly 1220 can be engaged with the drive assembly 1210, the switching assembly 1220 including a first gear 1221, a shaft 1222 and a switching fork 1223. The first gear 1221 is disposed on the shaft 1222 and is rotatable about the shaft 1222. The first gear 1222 is engaged with the drive gear 1212 of the drive assembly 1210 and receives a power input from the drive assembly 1210.

A first power output assembly 1230 including a first power gear 1231, a first rotary drive shaft 1232, and a first transmission 1233; the first power gear 1231 is capable of meshing with the first gear 1221 of the switching assembly 1220. The first rotation driving rod 1232 is mutually matched with the first transmission member 1233, so that the first rotation driving rod 1232 can drive the first transmission member 1233 to move basically in a straight line. The first transmission member 1233 can be connected to the anvil driving member 1112 to transmit power. The anvil driver 1112 controls the closing and opening of the anvil assembly 1110 and the staple storage assembly 1120 by driving the anvil assembly 1110.

When the shift fork 1223 pushes the first gear 1221 to the first position, the first gear 1221 is simultaneously engaged with the driving gear 1212 and the first power gear 1231. Power from drive assembly 1210 is thus transmitted to first power output assembly 1230. Power is transmitted from the first driver 1233 of the first power output assembly 1230 through the anvil driver 1112 to the anvil assembly 1110. Wherein the first rotation driving rod 1232 is rotatable. The first rotational drive rod 1232 may be an at least partially threaded lead screw or screw. The first transmission member 1233 is engaged with the thread of the screw rod or the screw rod. The first transmission member 1233 may have a pin, and the pin moves along the screw rod or the screw thread of the screw rod, so that the first transmission member 1233 generates a linear motion. The screw rod or the threaded rod can be a variable speed screw rod or a variable speed threaded rod. As shown in fig. 3, the thread of the shift screw includes a first region and a second region, the first region being closer to the first power gear 1231 than the second region. The pitch of the first region is greater than the pitch of the second region. Thereby providing for rapid closure of the anvil staple cartridge at the beginning of closure, as well as pressure closure at the end of closure.

A second power take off assembly 1240 comprising a second power gear 1241, a second rotary drive shaft 1242 and a second transfer member 1243. The second power gear 1241 is engageable with the first gear 1221 of the switching assembly 1220. Said second rotary driving rod 1242 cooperates with said second transmission member 1243, said second transmission member 1243 may be provided with a pin, so that said second rotary driving rod 1242 can drive said second transmission member 1243 in a substantially linear movement. The second transmission member 1243 may be connected to the staple pushing assembly 1122 via a staple pushing driving rod 1244 to implement power transmission and complete the firing of the cutting knife and the staples.

When the shift fork 1223 pushes the first gear 1221 to the second position, the first gear 1221 is simultaneously engaged with the driving gear 1212 and the second power gear 1241. Power from drive assembly 1210 is thus transmitted to a second power output assembly 1240. Power is transferred from the staple driving shaft 1244 of the secondary power output assembly 1240 to the staple pushing assembly of the staple storage assembly 1120. Wherein the second rotation drive rod 1242 is rotatable. The second rotary drive rod 1242 may be an at least partially threaded lead screw or screw. The second transmission member 1243 is engaged with the screw thread of the screw rod or the screw rod. The second transmission member 1243 may be provided with a pin, and the pin moves along the screw rod or the screw thread to make the second transmission member 1243 move linearly.

The drive shaft 12111 of the drive assembly 1210 is substantially parallel to the shaft 1222 of the switch assembly 1220. Further, the drive shaft 12111 of the drive assembly 1210 is substantially parallel to the first rotary drive shaft 1232 of the first power take off assembly 1230. Further, the drive shaft 12111 of the drive assembly 1210 is substantially parallel to the second rotary drive rod 1242 of the second power output assembly 1240.

FIG. 5 is a schematic view of a single motor, powered surgical instrument according to a second embodiment of the present invention; fig. 6 is a schematic diagram of a switching assembly according to a second embodiment of the present invention. The switching member 2220 is capable of meshing with the driving member 2210, and the switching member 2220 includes a first gear 2221, a second gear 2222, a shaft 2223, and a switching fork 2224. The first gear 2221 and the second gear 2222 are provided on the shaft 2223. The first gear 2221 and the second gear 2222 are connected to each other, for example, by a sleeve fitted over the shaft 2223, or by a link, so that the first gear 2221 and the second gear 2222 can be rotated simultaneously. The first gear 2221 is engaged with a drive gear 2212 of the drive assembly 2210, receiving a power input of the drive assembly 2210. Shifting the shift fork 2224 can shift the first gear 2221 and the second gear 2222 between at least two positions. When the shift fork 2224 pushes the first gear 2221 to the first position, the second gear 2222 is in a meshed state with the first power gear 2231 of the first power take-off assembly 2230; enabling power from drive assembly 2210 to be delivered to the first power take-off assembly 2230. When shift fork 2224 pushes first gear 2221 to the second position, second gear 2222 is engaged with second power gear 2241 of second power take-off assembly 2240, and second gear 2222 is disengaged from first power take-off assembly 2230; enabling delivery of power from drive assembly 2210 to the second power take-off assembly 2240.

Based on the above structure, the switching unit 2220 realizes the input of the power obtained from the driving unit 2210 to the other units in a switchable manner through the second gear 2222. The first gear 2221 and the second gear 2222 are coaxially aligned.

Optionally, for the structure that the switching component 2220 includes the first gear 2221 and the second gear 2222, another switching manner may also be provided: shifting the shift fork 2224 can shift the first gear 2221 and the second gear 2222 between at least two positions. When the shift fork 2224 pushes the first gear 2221 to the first position, one of the second gear 2222 and the first gear 2221 is in a meshed state with the first power gear 2231 of the first power output assembly 2230; enabling power from drive assembly 2210 to be delivered to the first power take-off assembly 2230. When shift fork 2224 pushes first gear 2221 to the second position, the other of second gear 2222 and first gear 2221 is meshed with second power toothed wheel 2241 of second power take-off assembly 2240; enabling delivery of power from drive assembly 2210 to the second power take-off assembly 2240. However, whether in the first or second position, one of the first gear 2221 and the second gear 2222 must intermesh with the drive assembly 2210 to achieve power extraction from the drive assembly 2210. The first gear 2221 and the second gear 2222 are coaxially aligned.

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

FIG. 7 is a schematic view of a single motor, powered surgical instrument according to a third embodiment of the present invention; FIG. 8 is a schematic view of a cutting and stapling portion of a single motor electro-surgical instrument according to a third embodiment of the present invention. The powered surgical instrument according to the third embodiment of the present invention is a tubular powered stapler 300, including: a cutting suture 3100 and a handle 3200. The cutting suture portion 3100 can clamp, cut, and suture the severed gastrointestinal tissue, and can connect the severed gastrointestinal tissue. The cutting stapler portion 3100 includes an anvil assembly 3110 and a staple storage assembly 3120. The anvil assembly 3110 includes an annular anvil seat 3111 and an anvil shaft 3112. The staple storage assembly 3120 includes a staple storage assembly housing 3121, a staple pushing assembly (not shown), an annular staple cartridge 3123, an anvil drive member 3124, and an annular cutting knife 3125. Staples (not shown) are disposed within annular cartridge 3123. The anvil driving component 3124 is detachably connected to the anvil assembly 3110, and the anvil driving component 3124 drives the anvil assembly 3110 to axially displace back and forth, so as to clamp and release tissue.

The hand-held portion 3200 includes: a drive assembly 3210, a switching assembly 3220, a first power output assembly 3230, a second power output assembly 3240, a power supply assembly 3250, a control circuit 3260, and a housing portion 3270. The power supply assembly 3250 provides power to the entire powered surgical instrument, including batteries, which may be disposable or rechargeable. The battery may be fixed in the handle section 3200 or may be detachably provided in the handle section 3200. A driving assembly 3210 including a driving gear 3212 and a motor 3211; and may also include a reduction gearbox and/or encoder for use with the motor.

The control circuit 3260 includes a circuit board and circuit elements. The control circuit 3260 includes an input port through which an input signal is obtained and an output port through which an output signal is provided. The control circuit 3260 is connected to the driving component 3210 and controls the driving component 3210.

The housing portion 3270 can house a drive component 3210, a switching component 3220, a power component 3250, and a control circuit 3260. And can house at least a portion of first and second power take-

off assemblies

3230 and 3240.

The handle 3200 also includes a firing button assembly 3280; the firing button assembly 3280 is coupled to the control circuit 3260 for providing a drive signal for driving the tubular electric stapler 300. The firing button assembly 3280 is pressed, the firing button assembly 3280 provides an anvil staple cartridge closing signal or a firing signal to a signal input port of the control circuit 3260, an output port of the control circuit 3260 outputs a driving signal to the driving assembly 3210, the driving assembly 3210 outputs power outwards, and the power is transmitted to the cutting and suturing portion 3100. In the first output mode, the firing button assembly 3280 outputs an anvil staple cartridge closing signal through the control circuit 3260, and the power output by the driving assembly 3210 is transmitted to the first power output portion 3230 and further transmitted to the anvil driving member 3124, so as to pull the anvil assembly 3110 and clamp the digestive tract tissue between the anvil assembly 3110 and the staple storage assembly 3120. Then, a switching component 3220 is arranged to convert the output mode into a second output mode, at this time, the firing button component 3280 outputs a firing signal through a control circuit, the power output by the driving component 3210 is transmitted to the second power output part 3240 and further transmitted to the staple pushing component, and the staple pushing component drives the cutting knife 3125 and the staple pushing piece and drives staples in the annular staple cartridge 3123, so that the cutting and suturing part 3100 is fired, and the cutting and suturing of the tissue are completed. The firing button assembly 3280 can be disposed on a housing portion 3270.

The handle 3200 also includes a reset button 3290. After the cutting and stapling of the tissue has been completed, the switch assembly 3220 is configured to switch the output mode back to the first output mode, and the reset button 3290 provides a drive signal via the control circuit 3260 to control the drive assembly 3210. The power output by the driving assembly 3210 is transmitted to the anvil driving member 3124 again, so that the anvil assembly 3110 is far away from the staple storage assembly 3120, thereby realizing the release of the stapled tissue.

FIG. 9 is a partial schematic view of a single motor powered surgical instrument according to a third embodiment of the present invention; FIG. 10 is a schematic view of a single motor electro-surgical instrument switching assembly according to a third embodiment of the present invention. A drive assembly 3210, including a motor 3211 and a drive gear 3212, the drive assembly 3210 having a drive shaft 32111. The driving gear is provided on the driving shaft 32111 to rotate with the driving shaft 32111. The drive assembly 3210 may further include a reduction gear box and/or an encoder configured with the motor.

A switching assembly 3220 is engageable with the drive assembly 3210, the switching assembly 3220 including a first gear 3221, a shaft 3222, and a switching fork 3223. The first gear 3221 is disposed on the shaft 3222 and is rotatable about the shaft 3222. The first gear 3222 is engaged with the driving gear 3212 of the driving assembly 3210, and receives power input from the driving assembly 3210.

A first power take-off assembly 3230 comprising a first power gear 3231, a first rotary drive rod 3232 and a first transmission 3233; the first power gear 3231 can be engaged with the first gear 3221 of the switching assembly 3220. The first rotary drive rod 3232 and the first transmission member 3233 are engaged with each other, so that the first rotary drive rod 3232 can drive the first transmission member 3233 to move substantially linearly. The first transmission member 3233 can be connected to the anvil driving member 3124 to realize power transmission. The anvil driving member 3124 controls the closing and opening of the anvil assembly 3110 and the staple storage assembly 3120 by driving the anvil assembly 3110.

When the switching fork 3223 pushes the first gear 3221 to the first position, the first gear 3221 is simultaneously engaged with the driving gear 3212 and the first power gear 3231. Power from the drive assembly 3210 is thus transmitted to the first power take-off assembly 3230. Power is transmitted from first transmission 3233 of first power take-off assembly 3230 through anvil drive 3124 and anvil lever 3112 to anvil assembly 3110. Wherein the first rotary drive rod 3232 is rotatable. The first rotary drive rod 3232 can be an at least partially threaded lead screw or threaded rod. The first transmission member 3233 engages with the thread of the lead screw or threaded rod. The first transmission member 3233 may include a pin that moves along the screw or the thread of the screw rod to generate a linear motion of the first transmission member 3233. The screw or threaded rod may be a variable speed screw or threaded rod. As shown in fig. 9, the threads of the shift screw include a first region and a second region, the first region being closer to the first power gear 3231 than the second region. The pitch of the first region is greater than the pitch of the second region. Thereby providing for rapid closure of the anvil staple cartridge at the beginning of closure, as well as pressure closure at the end of closure.

And a second power take-off assembly 3240, including a second power gear 3241, a second rotary drive shaft 3242, and a second transmission member 3243. The second power gear 3241 can be engaged with the first gear 3221 of the switching assembly 3220. The second rotary driving rod 3242 cooperates with the second transmission element 3243, and the second transmission element 3243 may be provided with a pin, so that the second rotary driving rod 3242 can drive the second transmission element 3243 to move substantially linearly. The second transmission member 3243 may be connected to the staple pushing assembly via a staple pushing driving rod 3244 to transmit power to complete the firing of the cutting blade 3125 and the staples.

When the switching fork 3223 pushes the first gear 3221 to the second position, the first gear 3221 simultaneously meshes with the driving gear 3212 and the second power gear 3241. Power from the drive assembly 3210 is thus transmitted to the second power take-off assembly 3240. Power is transmitted from the staple driving rod 3244 of the second power take-off assembly 3240 to the staple pushing assembly of the staple storage assembly 3120. Wherein the second rotary drive rod 3242 is rotatable. The second rotary drive rod 3242 can be an at least partially threaded lead screw or threaded rod. The second transmission element 3243 cooperates with the thread of the screw or spindle. The second transmission element 3243 may include a pin that moves along a screw or a thread of a screw rod to move the second transmission element 3243 linearly.

The drive shaft 32111 of the drive assembly 3210 is substantially parallel to the axis 3222 of the switching assembly 3220. Further, the drive shaft 32111 of the drive assembly 3210 is substantially parallel to the first rotary drive rod 3232 of the first power take-off assembly 3230. Further, the drive shaft 32111 of the drive assembly 3210 assembly is substantially parallel to the second rotary drive rod 3242 of the second power take-off assembly 3240.

As shown, the switching assembly 3220 in this third embodiment has the same structure as the switching assembly 1220 in the first embodiment.

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

Both the tubular anastomat and the anorectal anastomat need to drive the nail anvil assembly to complete the closing of the nail anvil and nail bin, so that the clamping of tissues is realized; both of which in turn require the staple pushing assembly and the cutting blade to be driven to complete the cutting of the tissue. The motion processes of the nail anvil and the nail pushing component are mutually independent, and the nail anvil and the nail pushing component need to be driven by two relatively independent driving or transmission structures. Since the switching assembly 3220 in this 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 be used for an electric tubular stapler as well.

The invention provides a single-motor electric surgical instrument which can realize tissue cutting and anastomotic nail firing in a motor-driven mode. The single-motor electric surgical instrument can realize the closing, the firing and the resetting of the anastomat through a single motor. The single-motor electric surgical instrument provided by the invention can stably fire anastomosis nails. Achieving smooth cutting and effective suturing of the tissue. Reduce postoperative bleeding and accelerate the recovery of patients. The invention adopts the single motor and the switching structure to realize the dual-drive output, thereby reducing the structural complexity of the electric surgical instrument and saving the cost. Meanwhile, a safety structure for preventing error triggering is formed by setting the initial driving state.

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

Claims

1. A single motor powered surgical instrument, comprising:

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

a hand-held portion, the hand-held portion comprising:

a power supply component;

the driving assembly comprises a driving gear and a motor;

the switching assembly can be meshed 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 meshed with the driving gear of the driving assembly; the output switching part is coupled with the first gear; the switching assembly is meshed with the driving gear of the driving assembly; the switching component can be in a first output mode or a second output mode by toggling the output switching part;

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

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

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

a housing portion.

2. The single motor powered surgical instrument of claim 1,

in the first output mode, the first gear is simultaneously meshed with the drive gear and a first power gear of the first power output assembly;

in the second output mode, the first gear is simultaneously meshed with the drive gear and a second power gear of the second power output assembly.

3. The single motor powered surgical instrument of claim 1,

the switching assembly further comprises a second gear arranged on the shaft, the second gear is connected with the first gear and can rotate simultaneously;

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

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

4. The single motor powered surgical instrument of claim 3,

in the first output mode, one of the first gear and the second gear is in mesh with a 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 in mesh with a second power gear of the second power output assembly.

5. The single motor powered surgical instrument of any one of claims 1-4, wherein the single motor powered surgical instrument handpiece further comprises a firing button assembly coupled to the control circuit for providing a signal to control the movement of the drive assembly.

6. The single motor powered surgical instrument of any one of claims 1-5, wherein the single motor powered surgical instrument handpiece further comprises a reset button coupled to the control circuit for providing a signal to control the movement of the drive assembly.

7. The mono-motor powered surgical instrument according to any one of claims 1-6, wherein the mono-motor powered surgical instrument is an anorectal stapler or a tubular stapler.