CN117653246A - Surgical instrument - Google Patents

Abstract

A surgical instrument has a driver having a first state coupled to a power module and a second state decoupled from the power module; in the first state, the electric module drives the transmission assembly to advance or retract through the driving piece so as to enable the cutter assembly to advance or retract; the manual operation piece is operated to perform first movement so as to drive the driving piece to switch from the first state to the second state; in the second state, the cutter assembly is operated to perform a second motion to drive the rotating shaft to rotate, so that the driving piece drives the transmission assembly to retract to enable the cutter assembly to retract. The cutting knife assembly can be returned to the initial position in an emergency state, unnecessary accidents are avoided, different functional requirements of surgical instruments are met, the operation is labor-saving, the use of doctors is convenient, and the whole structure is simple, safe and reliable.

Description

Surgical instrument

Technical Field

The invention relates to the technical field of medical instruments, in particular to a surgical instrument.

Background

The anastomat suitable for the surgical operation is a surgical cutting anastomat which can cut off redundant tissues while suturing wounds of patients, and is widely applied to tissue cutting and anastomosis in minimally invasive operations such as abdominal surgery, gynecology, pediatrics, chest surgery and the like. Surgical cutting staplers sever and staple tissue by accessing a patient through a cannula of a penetrator that is precisely positioned at a surgical site, then making a longitudinal incision in the tissue and applying staples on opposite sides of the incision. The stapler comprises an end effector, wherein the end effector comprises a nail bin seat and a nail abutting seat, and the nail bin seat is used for receiving a nail bin assembly; the nail bin assembly comprises a nail bin body and a plurality of staples arranged in the nail bin body, wherein the nail bin body is internally provided with a plurality of staples used for containing the staples, the nail bin body comprises a top end face, and a staple outlet formed by the staples penetrating through the top end face is formed in the top end face.

Once the surgeon determines that the end effector is clamping the target tissue, the surgical cutting stapler can be fired to sever and staple the tissue. When stapling, the top end surface contacts the tissue to be stapled, and a cutting member in the surgical cutting stapler pushes a wedge-shaped staple pushing piece in the staple cartridge to move, so that a staple driver drives staples in the staple cartridge to move upwards from the staple cavities to pierce and staple target tissue (i.e. staples out).

The motor may power the surgical instrument. When a doctor fires the surgical instrument, the motor rotates forward to enable the cutting knife to synchronously push the nail pushing block of the nail bin assembly to move from the initial position to the end position, so that the cut tissue is sutured while the redundant tissue is cut. The motor is also capable of reversing to reset the cutting blade to a second initial position to withdraw the upper ear from the staple holder pocket of the staple holder to open the end effector, unclamp tissue, reclose the end effector, and remove the surgical instrument from the penetration cannula.

However, when the motor fails, or the battery or other power source powering the motor fails, and sufficient power is not provided to the surgical instrument, the instrument must be immediately removed and replaced with a new instrument. At this time, the end effector of the surgical instrument may be locked, and the upper ear of the cutting blade may be positioned in the staple holder pocket, such that the end effector cannot be opened, and the clamped tissue cannot be disengaged from the end effector, resulting in the surgical instrument not being removed from the cannula of the penetrator. At this time, it is necessary to enlarge the puncture hole or to shift to an open surgery, and even to cause a medical accident.

Accordingly, there is a need for a retracting mechanism that can retract the cutter assembly to an initial position in an emergency to withdraw the upper ear from the abutment pocket of the abutment to thereby relieve the end effector from being opened.

In the prior art, when a surgical instrument breaks down and causes the motor to suddenly stop, the tool retracting mechanism is directly pressed, so that the driving gear is separated from the input gear of the motor, or the driving gear is separated from the rack, and then the rack is driven to move through the tool retracting mechanism. In this way, a large pressing force is required to disengage the drive gear from the input gear, or disengage the drive gear from the rack, resulting in a difficult operation of the retracting mechanism, thereby affecting the normal use of the surgical cutting stapler and increasing the risk of surgery. In addition, the tool retracting mechanism in the prior art has more parts, complex structure and low reliability.

Therefore, there is a need for a retracting mechanism that overcomes the above-described drawbacks.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a surgical instrument which solves the problems of high operation difficulty, complex structure, low reliability and increased operation risk of a tool retracting mechanism.

The invention is realized by the following technical scheme:

a surgical instrument comprising a power module, a drive assembly, a transmission assembly, and a retracting mechanism, the drive assembly being connected to the transmission assembly; the transmission assembly comprises a cutter assembly; the driving assembly comprises a rotating shaft and a driving piece, the driving piece is sleeved on the rotating shaft, and the driving piece is connected with the transmission assembly; the driving piece is provided with a first state connected with the electric module and a second state separated from the electric module; in the first state, the electric module drives the transmission assembly to advance or retract through the driving piece so as to enable the cutter assembly to advance or retract; the retracting mechanism comprises a manual operation member which is operated to perform a first motion to drive the driving member to switch from the first state to the second state; in the second state, the manual operation piece is operated to perform second movement to drive the rotating shaft to rotate, so that the driving piece is driven to drive the transmission assembly to retreat the cutter assembly; the manual operation member includes a first screw structure, and the rotation shaft includes a second screw structure, the first screw structure being mated with the second screw structure such that the manual operation member performs the first movement in response to being operated; and in the second state, the first screw structure and the second screw structure are matched to lock the manual operation piece and the rotary shaft, so that the rotary shaft can be driven to rotate by the manual operation piece.

Further, the manual operation piece is provided with a containing cavity, and the inner wall of the containing cavity is provided with the first thread structure; the first end of the rotating shaft is provided with the second thread structure, the second end of the rotating shaft is rotatably arranged on the seat body of the surgical instrument in a penetrating mode, and the second end is axially fixed with the seat body.

Further, a key is arranged on the outer side of the rotating shaft, a key groove is arranged on the inner side of the driving piece, and the key groove are matched to enable the rotating shaft to drive the driving piece to move when in the second state.

Further, the key is in a strip shape; the keyway slides along the key as the driver moves axially along the rotational axis.

Further, the tool retracting mechanism further comprises a moving piece, the moving piece is connected with the driving assembly, and the moving piece can be driven by the manual operation piece; the manual operation member is operated to move the driving member in the axial direction of the rotation shaft by the moving member when the first movement is performed, so that the driving member is switched from the first state to the second state.

Further, the moving part is sleeved on the rotating shaft and is coaxially arranged with the rotating shaft, and when the manual operation part does the first movement, the manual operation part is abutted to the moving part, and then the driving part is driven to move along the axial direction of the rotating shaft through the moving part.

Further, the retracting mechanism further comprises a fixing piece, wherein the fixing piece is provided with a first accommodating part, the first accommodating part is used for accommodating at least part of the moving piece, and the first accommodating part is also used for guiding the movement of the moving piece when the moving piece is driven by the manual operation piece.

Further, the fixing piece is further provided with a second accommodating part, the first accommodating part and the second accommodating part are communicated, and the radial width of the second accommodating part is larger than that of the first accommodating part; the second accommodating part is used for partially accommodating the manual operation piece.

Further, the retracting mechanism further comprises a fixing piece, the fixing portion comprises a first accommodating portion and a second accommodating portion, the first accommodating portion and the second accommodating portion are communicated, the radial width of the first accommodating portion is larger than that of the second accommodating portion, the first accommodating portion is used for partially accommodating the driving piece, and the second accommodating portion is used for partially accommodating the manual operation piece.

Further, the driving member includes a first gear and a second gear, and in the first state, the first gear is connected with the transmission assembly, and the second gear is connected with the electric module; in the second state, the first gear is connected with the transmission assembly, and the second gear is separated from the electric module.

Further, the transmission assembly further comprises a rack, and the rack is connected with the cutting knife assembly.

The invention has the beneficial effects that: the surgical instrument can be normally used to cut and stitch target tissues, the cutting component can be returned to the initial position in an emergency state, unnecessary accidents are avoided, different functional requirements of the surgical instrument are met, the manual operation component is enabled to move downwards through the cooperation of the first thread structure of the manual operation component and the second thread structure of the rotating shaft to act on the driving component when being operated, the driving component is enabled to be separated from the electric module, compared with the modes of direct pressing or cam pressing and the like, the operation is more labor-saving, the operation is convenient for doctors, after the driving component is separated from the electric module, the first thread structure and the second thread structure are locked, and the manual operation component is continuously operated to drive the rotating shaft to drive the driving component to move so as to realize tool withdrawal. The whole structure is simple, no complex design is needed, and the safety and reliability of surgical instruments are improved; on the other hand, under normal conditions, the motor drives the cutter assembly to move through the driving assembly, and under emergency conditions, the manual operation piece is operated to drive the same driving assembly to realize the retreating of the cutter assembly, so that an additional structure is not needed, a transmission mechanism of a surgical instrument is simplified, the structural design is reasonable, the volume of the whole machine is reduced, and the weight of the whole machine is reduced.

Drawings

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

FIG. 2 is an exploded perspective view of a portion of the cutting drive mechanism of the surgical instrument illustrated in FIG. 1;

FIG. 3 is a schematic illustration of a portion of the mechanism of the surgical instrument illustrated in FIG. 1;

FIG. 4 is an exploded view of a portion of the mechanism of the surgical instrument illustrated in FIG. 3;

FIG. 5 is a schematic view of a view of the drive member of the surgical instrument of FIG. 1;

FIG. 6 is another perspective view of the driving member of FIG. 5;

FIG. 7 is a schematic illustration of the manual operating member of the surgical instrument illustrated in FIG. 1;

FIGS. 8-10 are schematic views of a change in state of the retracting mechanism and drive assembly of the surgical instrument of FIG. 1;

FIG. 11 is a schematic structural view of a portion of the mechanism of a surgical instrument provided in accordance with a first embodiment of the present invention;

fig. 12 is an exploded view of a portion of the mechanism shown in fig. 11.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It will be appreciated that the terms "proximal", "rear" and "distal", "front" are used herein with respect to a clinician manipulating a handle of a stapler. The terms "proximal" and "posterior" refer to the portions that are closer to the clinician, and the terms "distal" and "anterior" refer to the portions that are farther from the clinician. I.e., the handle is proximal and the end effector is distal, if the proximal end of a component is shown relatively near the end of the handle, the distal end is shown relatively near the end of the end effector. The terms "upper" and "lower" refer to the relative positions of the staple abutment and the cartridge seat of the end effector, specifically the staple abutment being "upper" and the cartridge seat being "lower". However, the stapler can be used in many orientations and positions, and thus these terms expressing relative positional relationships are not limiting and absolute.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, movably connected, or integrated, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two elements or interaction relationship between the two elements such as abutting. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. It should be noted that, when the terms "connected" and "connected" are used in the meanings defined by the corresponding terms, only the cases where the terms are clearly required are excluded, and other possible cases are not excluded, such as "detachably connected" means detachably connected, not including being integrated, but movable connection and the like are not excluded.

Referring to fig. 1-10, a first embodiment of the present invention, a surgical instrument, specifically a stapler 100, is illustrated.

Referring to fig. 1 to 8, a stapler 100 includes a main body 10, a shaft assembly 20 extending from the main body 10, and an end effector 30 disposed at a distal end of the shaft assembly 20. The shaft assembly 20 includes a sleeve 21. The end effector 30 includes a cartridge housing 31, a staple cartridge housing 32, and a cartridge assembly (not shown), the cartridge housing 31 being pivotally connected to the staple cartridge housing 32, the cartridge housing 31 being operable to support the cartridge assembly therein, the staple cartridge housing 32 being selectively movable between an open position and a closed position to cooperate with the cartridge housing 31 and the cartridge assembly to loosen or clamp tissue.

Stapler 100 also includes a motorized module 40 and a cutting drive mechanism. The electric module 40 includes a motor 41 and an input member 42 connected to the motor 41; the cutting drive mechanism comprises a drive assembly 29 and a transmission assembly driven by the drive assembly 29, and the motor 41 drives the drive assembly 29 through an input member 42 to move, thereby driving the transmission assembly to move. The transmission assembly comprises a transmission piece 22, a mandrel 23 and a cutting knife assembly 24, wherein the mandrel 23 is accommodated in the sleeve 21, the proximal end of the mandrel 23 is connected with the transmission piece 22, and the distal end is connected with the cutting knife assembly 24. The cutter assembly 24 is used for cutting tissue, the cutter assembly 24 includes a cutter bar 25 and a cutter 26 connected to the cutter bar 25, the advance of the cutter assembly 24 is referred to as feeding, and the retreat of the cutter assembly 24 is referred to as retracting. The cartridge assembly is provided with a feed slot for movement of the cutter 26, the feed slot being arranged along the length direction of the cartridge assembly, the cartridge seat 31 being provided with a cartridge seat slot (not shown) along its length direction, the abutment seat 32 being provided with a guide slot along its length direction. The cutter 26 includes ear 27 and joint portion 28 on, and ear 27 is located the cutter upside, and joint portion 28 is located the cutter downside, and joint portion 28 corresponds with ear 27's position on, and ear 27 and joint portion 28 form the I shape, and nail storehouse seat groove, support nail seat groove (i.e. guide way) and the feed slot of nail storehouse subassembly and provide accommodation space and route direction for cutter 26 jointly. The nail bin seat groove (not shown) is matched with the clamping part 28, the guide groove is matched with the upper lug part 27, so that a movement channel is provided for the clamping part 28 and the upper lug part 27 respectively, the shape of the upper lug part 27 is matched with the shape of the guide groove, the shape of the clamping part 28 is matched with the shape of the nail bin seat groove (not shown), and the shape of the clamping part 28 is matched with the shape of the nail bin seat groove, so that the cutting knife 26 can be prevented from shaking by the shape matching of the clamping part and the upper lug part 27. The upper ear 27 is positioned in a guide slot that provides a path guide for forward or rearward movement of the upper ear 27 during feed and retract. Meanwhile, the guide groove limits the movement of the upper ear 27 in the up-down direction, so that the upper ear 27 cannot be separated from the guide groove during the feeding and retracting processes, so that the cutter 26 limits the movement of the nail abutment to the direction of the open position, and the end effector cannot be opened at this time. The upper ear 27 does not enter or disengage from the guide slot before or after the feed is completed, and the cutter does not limit the movement of the abutment, at which time the end effector can be selectively moved between the open and closed positions.

The motor 41 drives the drive assembly 29 through the input member 42 to effect movement of the cutter assembly 24. Stapler 100 further includes an end effector drive mechanism that drives staple abutment 32 of end effector 30 to pivot relative to cartridge housing 31 for selective movement between a closed position and an open position. Generally, the end effector drive mechanism includes a gear, a cam, and a sleeve, the gear driving the sleeve 21 for linear movement by cam translation, the sleeve 21 for linear movement driving the anvil 32 for pivoting by the translation mechanism. The specific construction of the end effector drive mechanism is the same or similar to that of the prior art and will not be described in detail.

When the stapler 100 is in use, firstly, the end effector driving mechanism drives the sleeve 21 to move forward so as to drive the nail propping seat 32 to pivot to cooperate with the nail bin assembly to clamp target tissues; then, the motor 41 rotates positively, the cutter assembly 24 is driven to feed by the driving assembly 29, the cutter assembly 24 moves from the initial position to the end position to cut tissues, and the cutter assembly 24 synchronously pushes the nail pushing block in the nail bin assembly to move from the initial position to the end position, so that the effect of suturing the cut tissues is realized while the tissues are cut; subsequently, the motor 41 is reversed, and the cutter assembly 24 is driven to retract to the initial position by the drive assembly 29; then, the end effector drive mechanism drives the sleeve 21 to move backwards to drive the staple holder 32 open to loosen tissue; finally, the end effector drive drives the sleeve 21 to drive the anvil 32 closed. Of course, before and after the stapler 100 is used, the nail pushing seat 32 needs to be closed relative to the nail cartridge seat 21, so that the end effector 30 extends into or is taken out from the patient through the puncture cannula, and no description is repeated.

In this embodiment, the driving component 29 includes a rotation shaft 35 and a driving member 33, the driving member 33 is sleeved on the rotation shaft 35, and the driving member 33 is connected with the transmission component; the driving member 33 has a first state of being connected to the electromotive module 40 and a second state of being separated from the electromotive module 40; in the first state, the electromotive module 40 drives the transmission assembly to advance or retract by the driving member 33 to advance or retract the cutter assembly 24. Stapler 100 further includes a retracting mechanism including a manual operation member 70, the manual operation member 70 being operated to perform a first movement to drive driving member 33 to switch from the first state to the second state; in the second state, the manual operation member 70 is operated to perform the second movement to drive the rotation shaft 35 to rotate, so that the driving member 33 drives the transmission assembly to retract; the manual operation member 70 includes a first screw structure 51, and the rotation shaft 35 includes a second screw structure 52, the first screw structure 51 being engaged with the second screw structure 52 such that the manual operation member 70 performs a first movement in response to being operated; and in the second state, the first thread structure 51 and the second thread structure 52 cooperate to lock the manual operation member 70 and the rotation shaft 35, so that the rotation shaft 35 can be driven by the manual operation member 70 to rotate, and the driving member 33 is driven to drive the transmission assembly to retract the cutter assembly 24. On the one hand, the first screw thread structure 51 of the manual operation member 70 is matched with the second screw thread structure 52 of the rotation shaft 35 to enable the manual operation member 70 to perform the first movement so as to enable the driving assembly 29 to be separated from the electric module 40, compared with the direct pressing or cam pressing mode, the manual operation member is more labor-saving, is convenient for doctors to use, and after the driving assembly 29 is separated from the electric module 40, the first screw thread structure 51 is locked with the second screw thread structure 52, and the manual operation member 70 is continuously operated to drive the rotation shaft 35 to drive the driving assembly 33 to move so as to realize tool withdrawal. The whole structure is simple, complex design is not needed, and the safety and reliability of the anastomat are improved; on the other hand, the motor 41 drives the cutter assembly 24 to move through the driving assembly 29 under normal conditions, and in emergency conditions, the manual operation member 70 is operated to drive the same driving assembly 29 so as to realize the retreating of the cutter assembly 24, so that an additional structure is not needed, the transmission mechanism of the anastomat is simplified, the structural design is reasonable, the whole machine volume is reduced, and the weight of the whole machine is reduced.

Specifically, the manual operation member 70 in this embodiment has a housing chamber, and the inner wall of the housing chamber is provided with the first screw structure 51; the first end of the rotating shaft 35 is provided with a second thread structure 52, the second end of the rotating shaft 35 is rotatably penetrated in the seat body of the surgical instrument, and the second end of the rotating shaft 35 is rotatably penetrated in the seat body 60 and is axially fixed with the seat body 60; the seat 60 is fixedly mounted to the body of the stapler 100. By the design, the whole structure of the anastomat 100 is more compact, the space utilization rate is improved, and the whole size of the anastomat 100 is reduced.

In the first state, the driving member 33 is connected with the input member 42; in the second state, the driving member 33 is separated from the input member 42; the manual operation member 70 is operated to make a first movement to drive the driving member 33 to move in the axial direction of the rotation shaft 35 to switch the driving member 33 from the first state to the second state; wherein the first movement comprises a downward movement, the manual operation member 70 is operated to move downward from its initial position, during which movement the manual operation member 70 abuts the driving member 33 to drive the driving member 33 from a first position connected to the input member 42 to a second position separated from the input member 42, i.e. in which the driving assembly 29 is disconnected from the electric module 40. And in the second state, the manual operation member 70 is operated to perform a second movement to drive the rotation shaft 35 to rotate, thereby driving the driving member 33 to move, wherein the second movement includes a rotational movement. The driving member 33 has a central hole 37 extending in the axial direction and penetrating both side end surfaces, the central hole 37 is fitted over the rotation shaft 35, a key groove 38 is provided in the inner wall of the central hole 37 in the axial direction, a key 43 is provided on the outer side of the rotation shaft 35, and the key groove 38 of the driving member 33 moves downward along the key 43 of the rotation shaft 35 in the course that the driving member 33 is driven by the manual operation member 70 to move in the axial direction of the rotation shaft 35 from a first position connected with the input member 42 to a second position separated from the input member 42; in the second state, the rotating shaft 35 is driven to transmit torque to the driving member 33 through the key 43, i.e., the key 43 and the key slot 38 cooperate such that the rotating shaft 35 can drive the driving member 33 and thus the transmission assembly. In this embodiment, for more stability when the rotation shaft 35 drives the driving member 33, the key 43 is elongated, and the key groove 38 is a groove having a square cross section, and the cross section is a plane taken in a direction perpendicular to the central axis of the driving member 33. The manual operation member 70 includes a first screw structure 51, and the rotation shaft 35 includes a second screw structure 52, and in the first state, the first screw structure 51 cooperates with the second screw structure 52 to cause the manual operation member 70 to perform a first movement in response to being operated; during the manual operation member 70 is operated to be rotated downward from the initial position to switch the driving member 33 from the first state to the second state, the first screw structure 51 is engaged with the second screw structure 52, and the manual operation member 70 is movable with respect to the rotation shaft 35; when in the second state, the first screw structure 51 is locked with the second screw structure 52 as the manual operation member 70 is moved, so that the manual operation member 70 is locked with the rotation shaft 35, and the rotation shaft 35 can be rotated by the manual operation member 70, thereby driving the driving member 33 to move. Therefore, no complex structure is needed, and the whole transmission is more stable and reliable only through the thread structure and the key structure.

In order to limit the axial displacement of the rotation shaft 35, the anastomat 100 further comprises a clamp spring 61, a clamping groove 44 is arranged at the second end of the rotation shaft 35, a through hole is arranged on the seat 60, the clamp spring 61 is clamped with the clamping groove 44 after the second end of the rotation shaft 35 rotatably penetrates through the through hole, the outer diameter of the clamp spring 61 is larger than the outer diameter of the rotation shaft 35 and the diameter of the through hole, and the upper end face of the clamp spring 61 abuts against the lower end face of the seat 60 so as to limit the rotation shaft 35 axially. Thereby, the second end of the rotation shaft 35 is axially fixed to the housing 60. The drive assembly 29 further includes a reset member 62 for maintaining the drive assembly 29 in connection with the input member 42 in the first state, in this embodiment, a first end of the reset member 62 is fixedly disposed on the housing 60 and a second end of the reset member 62 is connected to the drive assembly 29. In order to facilitate the installation of the reset element 62, the inner wall of the driving element 33 is provided with a step 39, the reset element 62 partially extends into the step 39, the second end of the reset element 62 abuts against the end surface of the step 39, and the space of the driving assembly 29 is fully utilized, so that the anastomat 100 is compact in structure. The step 39 is recessed upward from the bottom end of the driving member 33, is formed in a circumferential shape coaxial with the center hole 37, and has a diameter larger than that of the center hole 37. In this embodiment, the restoring member 62 is an elastic member, such as a coil spring.

As shown in fig. 3 to 6, in the present embodiment, the driving member 33 includes a first gear 34 and a second gear 36, the first gear 34 and the second gear 36 rotate synchronously, in the first state, the first gear 34 is connected to the transmission assembly, and the second gear 36 is connected to the input member 42; in the second state, the first gear 34 is connected to the transmission assembly and the second gear 36 is disconnected from the input member 42. As can be seen from the above, the transmission assembly includes a transmission member 22 and a cutter assembly 24 coupled to the transmission member 22; in this embodiment, the transmission member 22 is a rack, and the input member 42 is a motor gear. In the first state, the motor gear drives the rack to move through the second gear 36 and the first gear 34, so as to drive the cutter assembly 24 to move; in the second state, the second gear 36 is separated from the motor gear and cannot be driven by the motor 41, but the first gear 34 is still meshed with the rack, and the first gear 34 rotates to drive the rack to retract without overcoming the resistance of the motor 41. At this time, the manual operation member 70 is operated to drive the rotation shaft 35 to move the first gear 34 and the second gear 36, thereby driving the rack to retract. That is, the motor 41 normally drives the cutter assembly 24 to move through the driving assembly 29, and in an emergency, the manual operation member 70 is operated to drive the same driving assembly 29 to retract the cutter assembly 24, so that the transmission mechanism of the stapler 100 is simplified, the whole machine volume is reduced, the weight of the whole machine is reduced, and the use of doctors is facilitated.

It will be appreciated that the manual operation member 70 is a spare part, and the manual operation member 70 is installed only when the motor 41 or the circuit fails and the cutter assembly 24 cannot be driven to retract, i.e. the manual operation member 70 is not installed under normal conditions, thereby reducing the weight of the whole machine and avoiding the misoperation triggering the manual cutter returning. The manual operating member 70 comprises an operating end 71 and a driving end 72 extending outwards from the operating end 71, which driving end 72 is provided with the above-mentioned receiving cavity, the inner wall of which is provided with the above-mentioned first screw structure 51. In this embodiment, the manual operation member 70 is an L-shaped rod, which includes a first rod and a second rod angularly connected to the first rod, the operation end 71 is located at an end of the first rod, and the driving end 72 is located at an end of the second rod. And according to the lever principle, the labor-saving arm is larger than the resistance arm, so that the manual operation member 70 can be operated more labor-saving. In other embodiments the manual operator 70 may be a hand wheel. Those skilled in the art will appreciate that the manual operation member 70 is not limited to the above-described manner, and is not specifically enumerated and falls within the scope of the present invention. In order to make the movement of the manual operation member 70 and the driving member 33 more stable, the retracting mechanism further comprises a fixing member 53, which is disposed on the body of the stapler 100 and includes a first accommodating portion (not shown) and a second accommodating portion 54, the first accommodating portion and the second accommodating portion 54 are penetrated, and the radial width of the first accommodating portion is greater than the radial width of the second accommodating portion, so that a step surface is formed at the connection position of the first accommodating portion and the second accommodating portion 54, and the step surface can axially limit the driving member 33 in an initial state. The first receiving portion is for receiving the upper end of the driving member 33 and the second receiving portion 54 is for partially receiving the driving end 72 of the manual operating member 7.

As shown in fig. 3 and 8 to 10, the following describes the use of the stapler 100.

When stapler 100 is in the first state with normal operation, first gear 34 is engaged with the rack and second gear 36 is engaged with the motor gear. When needed, the motor 41 drives the motor gear to rotate, and the motor gear rotates to drive the second gear 36 and the first gear 34 to rotate, so that the rack is driven to drive the cutter assembly 24 to feed or retract a cutter.

When the stapler 100 fails and a manual retraction is required, a protective cover (not shown) is opened, exposing the rotary shaft 35. The rotary shaft 35 is inserted into the driving end 72 of the manual operation member 70, and the manual operation member 70 is rotated, and the first screw structure 51 thereof is engaged with the second screw structure 52 of the rotary shaft 35, so that the manual operation member 70 moves downward until the first screw structure 51 is locked with the first screw structure 52, and the manual operation member 70 is not moved downward any more. The manual operating member 70 moves downwardly to drive the driving member 33 downwardly from a first position (shown in fig. 8) in which it is engaged with the motor gear to a second position (shown in fig. 10) in which it is disengaged from the motor gear, while the first gear 34 is still engaged with the rack and the second gear 36 is disengaged from the motor gear. At this time, the first screw structure 51 and the first screw structure 52 are locked to lock the manual operation member 70 and the rotation shaft 35, and it should be noted that "the first screw structure 51 and the first screw structure 52 are locked" may be that the first screw structure 51 moves to be combined with the thread tail of the second screw structure 52 to lock the first screw structure 51 and the first screw structure 52, and it is understood by those skilled in the art that the thread tail is a thread ending portion, and the tooth shape of the portion is an incomplete tooth shape; preferably, in this example, the "locking of the first thread structure 51 and the first thread structure 52" means that the end surface of the first thread structure 51 abuts against the end surface of the second thread structure 52 so that the first thread structure 51 and the first thread structure 52 are locked, and this arrangement makes the locking more reliable, and thus makes the subsequent driving of the rotation shaft 35 by the manual operation member 70 more stable and reliable. After the first screw structure 51 and the first screw structure 52 are locked, the manual operation member 70 and the rotation shaft 35 are fixedly connected with the first screw structure 52 through the first screw structure 51 so that the manual operation member 70 and the rotation shaft 35 are locked, and the rotation shaft 35 can be driven to rotate by the manual operation member 70. Continued rotation of the manual operating member 70 drives the rotation shaft 35 to rotate, which in turn drives the first and second gears 34, 36, and the first gear 34 drives the rack to retract, which in turn drives the cutter assembly 24 to retract.

In summary, in the present embodiment, on the one hand, the cooperation of the first thread structure 51 of the manual operation member 70 and the second thread structure 52 of the rotation shaft 35 enables the manual operation member 70 to perform the first movement to disengage the driving assembly 29 from the electric module 40, which is more labor-saving than direct pressing or cam pressing, and is convenient for a doctor to use, and after the driving assembly 29 is disengaged from the electric module 40, the first thread structure 51 and the second thread structure 52 are locked, and the manual operation member 70 is continuously operated to drive the rotation shaft 35 to drive the driving assembly 29 to move to implement the retracting. The whole structure is simple, complex design is not needed, and the safety and reliability of the anastomat are improved; on the other hand, the motor 41 drives the cutter assembly 24 to move through the driving assembly 29 under normal conditions, and the manual operation member 70 is operated to drive the same driving assembly 29 to realize the retreating of the cutter assembly 24 under emergency conditions, so that an additional structure is not needed, the transmission mechanism of the anastomat 100 is simplified, the structural design is reasonable, the whole machine volume is reduced, and the weight of the whole machine is reduced.

Referring to fig. 11 to 12, a second embodiment of the present invention is the same as the first embodiment, and the present embodiment relates to a stapler.

The difference between this embodiment and the first embodiment is that the retracting mechanism further includes a moving member 80, the moving member 80 is connected to the driving assembly 29, and the moving member 80 can be driven by the manual operation member 70; the manual operation member 70 is operated to perform the first movement, and the driving member 33 is driven to move in the axial direction of the rotation shaft 35 by the moving member 80 to switch the driving member 33 from the first state to the second state. In the second state, the manual operation member 70 is operated to perform the second movement to drive the rotation shaft 35 to rotate, so that the driving member 33 drives the transmission assembly to retreat. The first threaded structure 51 of the manual operation member 70 cooperates with the second threaded structure 52 of the rotation shaft 35 to cause the manual operation member 70 to perform a first movement in response to being operated; and in the second state, the first screw structure 51 cooperates with the second screw structure 52 to lock the manual operation member 70 with the rotation shaft 35, thereby enabling the rotation shaft 35 to be driven to rotate by the manual operation member 70. In order to make the overall structure more compact, the moving member 80 is sleeved on the rotating shaft 35 and is coaxially arranged with the rotating shaft 35, and when the manual operation member 70 performs the first movement, the manual operation member is abutted against the moving member 80, so that the driving member 33 is driven to move along the axial direction of the rotating shaft 35 through the moving member 80. The moving part 80 is sleeved on the rotating shaft 35 and can rotate relative to the rotating shaft 35, and the moving part 80 can further radially limit the upper end of the rotating shaft 35, so that the movement of the moving part is more stable. In order to make the movement of the movement element 80 and the manual operation element 70 more stable, the retracting mechanism further comprises a fixing element 53 provided at the body of the stapler 100, the fixing element 53 having a first housing portion for housing at least part of the movement element 80 and for guiding the movement of the movement element 80 when the movement element 80 is driven by the manual operation element 70; the fixing member 53 further has a second accommodating portion 54, the first accommodating portion and the second accommodating portion 54 are penetrated, and a radial width of the first accommodating portion is larger than a radial width of the second accommodating portion 54, so that a step surface is formed at a connection portion of the first accommodating portion and the second accommodating portion 54, and the step surface can axially limit the moving member 80 in an initial state. The second receiving portion 54 is located above the first receiving portion for partially receiving the driving end 72 of the manual operating member 70.

In this embodiment, the cooperation of the first thread structure 51 of the manual operation member 70 and the second thread structure 52 of the rotation shaft 35 enables the manual operation member 70 to perform the first movement to drive the movement member 80 to move, so that the driving assembly 29 is separated from the electric module 40, which is more labor-saving than the direct pressing or cam pressing, and is convenient for the doctor to use, and after the driving assembly 29 is separated from the electric module 40, the first thread structure 51 and the second thread structure 52 are locked, and the manual operation member 70 is continuously operated to drive the rotation shaft 35 to drive the driving assembly 29 to move to realize tool withdrawal. The whole structure is simple, no complex design is needed, and the safety and reliability of the anastomat 100 are improved.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (11)

1. A surgical instrument comprising a power module, a drive assembly, a transmission assembly, and a retracting mechanism, the drive assembly being coupled to the transmission assembly; the transmission assembly comprises a cutter assembly;

the driving assembly comprises a rotating shaft and a driving piece, the driving piece is sleeved on the rotating shaft, and the driving piece is connected with the transmission assembly; the driving piece is provided with a first state connected with the electric module and a second state separated from the electric module; in the first state, the electric module drives the transmission assembly to advance or retract through the driving piece so as to enable the cutter assembly to advance or retract;

the retracting mechanism comprises a manual operation member which is operated to perform a first motion to drive the driving member to switch from the first state to the second state; in the second state, the manual operation piece is operated to perform second movement to drive the rotating shaft to rotate, so that the driving piece is driven to drive the transmission assembly to retreat the cutter assembly;

the manual operation member includes a first screw structure, and the rotation shaft includes a second screw structure, the first screw structure being mated with the second screw structure such that the manual operation member performs the first movement in response to being operated; and in the second state, the first screw structure and the second screw structure are matched to lock the manual operation piece and the rotary shaft, so that the rotary shaft can be driven to rotate by the manual operation piece.

2. The surgical instrument of claim 1, wherein the manual operating member has a receiving cavity, an inner wall of the receiving cavity being provided with the first thread formation; the first end of the rotating shaft is provided with the second thread structure, the second end of the rotating shaft is rotatably arranged on the seat body of the surgical instrument in a penetrating mode, and the second end is axially fixed with the seat body.

3. The surgical instrument of claim 1, wherein a key is provided on an outer side of the rotational shaft and a keyway is provided on an inner side of the driver, the key and keyway cooperating to cause the rotational shaft to drive the driver in motion when in the second state.

4. A surgical instrument according to claim 3, wherein the key is elongate; the keyway slides along the key as the driver moves axially along the rotational axis.

5. The surgical instrument of claim 1, wherein the retracting mechanism further comprises a moving member coupled to the drive assembly, the moving member being drivable by the manual operating member; the manual operation member is operated to move the driving member in the axial direction of the rotation shaft by the moving member when the first movement is performed, so that the driving member is switched from the first state to the second state.

6. The surgical instrument of claim 5, wherein the moving member is sleeved on the rotating shaft and is coaxially arranged with the rotating shaft, and the manual operation member abuts against the moving member when the manual operation member performs the first movement, so that the driving member is driven to move along the axial direction of the rotating shaft through the moving member.

7. The surgical instrument of claim 5, wherein the retracting mechanism further comprises a stationary member having a first receiving portion for receiving at least a portion of the moving member and for guiding movement of the moving member when the moving member is driven by the manual operating member.

8. The surgical instrument of claim 7, wherein the fastener further has a second receptacle, the first and second receptacles extending therethrough, the second receptacle having a radial width greater than a radial width of the first receptacle; the second accommodating part is used for partially accommodating the manual operation piece.

9. The surgical instrument of claim 1, wherein the retracting mechanism further comprises a securing member, the securing portion comprising a first receiving portion and a second receiving portion, the first receiving portion and the second receiving portion being through, a radial width of the first receiving portion being greater than a radial width of the second receiving portion, the first receiving portion being for partially receiving the driving member, the second receiving portion being for partially receiving the manual operating member.

10. The surgical instrument of claim 1, wherein the driver comprises a first gear and a second gear, the first gear being coupled to the transmission assembly and the second gear being coupled to the power module in the first state; in the second state, the first gear is connected with the transmission assembly, and the second gear is separated from the electric module.

11. The surgical instrument of claim 1, wherein the transmission assembly further comprises a rack, the rack being coupled to the cutting blade assembly.