CN119055302A

CN119055302A - Integrated tubular stapler

Info

Publication number: CN119055302A
Application number: CN202411322139.8A
Authority: CN
Inventors: 姚家亮; 翟立娜
Original assignee: Suzhou IntoCare Medical Technology Co Ltd
Current assignee: Suzhou IntoCare Medical Technology Co Ltd
Priority date: 2024-09-23
Filing date: 2024-09-23
Publication date: 2024-12-03

Abstract

The present invention relates to an integrated tubular stapler, belonging to the field of medical devices. The stapler's anvil and the stapler body are an integrated structure, which is different from the situation where the anvil and the stapler body are separated. The stapler's anvil assembly has two states: a folded structure and an unfolded structure, and can be switched between the two structures. When the stapler anvil assembly is in the folded structure, the area of its insertion port will be reduced, so that it is convenient for the stapler anvil assembly to enter the human body. When it is in the unfolded structure, the stapler anvil assembly is driven to move toward the suturing surface by a closing rod assembly to achieve closure. Since the stapler anvil assembly is always connected to the closing rod assembly in the above state, the stapler anvil assembly and the closing rod assembly do not need to be plugged in during the operation, which simplifies the operation process and reduces the difficulty of the operation.

Description

Integrated tubular anastomat

Technical Field

The invention relates to an integrated tubular anastomat, and belongs to the field of medical appliances.

Background

The tubular anastomat is mainly used for the separation and suture of esophagus operation, gastrointestinal operation and colorectal operation. The prior tubular anastomat comprises an anastomat body and an anvil assembly, wherein the anvil assembly and the anastomat body are detachably connected, and before operation, the anvil assembly and the anastomat body are two independent components. During operation, the nail anvil component and the anastomat body extend out of two cutting surfaces of the cut tissue respectively, then the rod body of the nail anvil component is in butt joint with the nail cylinder seat of the anastomat body, and after the butt joint, the nail anvil component is driven to move towards the direction of the nail cylinder seat through the closing rod so as to realize closing.

Because the nail anvil component and the anastomat body can be anastomosed only after being spliced in a human body, in the operation process, the operation space in the abdominal cavity or the thoracic cavity is limited, the visual field is limited, and the problem of difficult splicing is easy to occur for operators, thereby influencing the operation progress.

In addition, in colorectal surgery, the broken intestinal stump needs to be opened, the nail anvil is put in, and after the nail anvil is sutured again, the operations of butt joint, anastomosis and the like of the nail anvil and the anastomat body can be executed, and the steps are complicated and complicated, so that the surgery time is long.

Therefore, how to solve the insertion difficulty to improve the operation progress, so that the operation steps of the operation link are reduced (such as omitting to open the broken intestinal stump, placing the nail anvil head, and suturing again), for example, providing an integrated tubular anastomat for simplifying the operation process and reducing the operation difficulty is one of the technical problems to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide an integrated tubular anastomat which simplifies the operation process and reduces the operation difficulty.

In order to achieve the above purpose, the invention provides the following technical scheme that the integrated tubular anastomat comprises:

the holding assembly comprises a holding shell, a power source arranged in the holding shell and a control piece for controlling the power source to operate;

The rod body assembly comprises an outer sleeve, a closing rod assembly and a firing rod assembly, wherein one end of the outer sleeve is fixed on the holding shell, and the closing rod assembly and the firing rod assembly are arranged in the outer sleeve;

The nail bin barrel assembly comprises a barrel shell arranged on the other end of the outer sleeve, an annular bin body arranged in the barrel shell, a stitching nail arranged in the annular bin body, a nail pushing sheet arranged below the stitching nail and an annular cutting knife arranged on the inner side of the annular bin body, and

The nail anvil assembly is provided with an unfolding structure and a folding structure, a plurality of nail pits are formed on the nail anvil assembly, all the nail pits face to the stitching surface of the annular bin body when in the unfolding structure, the closing rod assembly penetrates through the nail bin barrel assembly to be connected with the nail anvil assembly, the closing rod assembly drives the nail anvil assembly to be switched between the unfolding structure and the folding structure, and the nail anvil assembly is always connected with the closing rod assembly when in the unfolding structure, the folding structure and the folding structure.

Further, the nail anvil assembly comprises a base and a plurality of turnover parts pivoted on the base, the turnover parts are provided with the nail pits, and the closing rod assembly drives the turnover parts to turn over relative to the base.

Further, the closing rod assembly comprises a fixed pipe body, a movable pipe body sleeved with the fixed pipe body and a traction rod with two ends respectively hinged to the movable pipe body and the turnover part, the base part is fixed on the fixed pipe body, and the movable pipe body can move in the fixed pipe body along the axial direction of the fixed pipe body.

Further, the anvil assembly further includes a displacement portion movable relative to the base portion, the displacement portion having the staple pockets formed thereon, the displacement portion and the turnover portion being circumferentially spaced apart when in the deployed configuration.

Further, the movable pipe body can rotate relative to the fixed pipe body, a toothed ring structure is arranged on the base, a first circumferential limiting structure is arranged between the toothed ring structure and the movable pipe body, the movable pipe body drives the toothed ring structure to rotate relative to the base, the displacement portion is provided with a rack portion extending along the radial direction of the base, a micro gear for transmission is arranged between the rack portion and the toothed ring structure, and the micro gear shaft is fixed on the base.

Further, the fixed pipe body is sleeved on the outer side of the movable pipe body, a plurality of slots extending along the axial direction are formed in the fixed pipe body, a lantern ring is sleeved on the movable pipe body, the lantern ring can rotate relative to the movable pipe body, and the movable pipe body is hinged with the traction rod through the lantern ring;

the collar is formed with a protruding rod portion protruding therefrom for hinging with the traction rod, the protruding rod portion passing through the slot, or the traction rod passing through the slot for hinging with the collar.

Further, the closing lever assembly includes a driving wheel set to transmit the rotational force of the power source, a first driving unit to transmit the rotational force of the driving wheel set to the movable tube, a second driving unit to convert the rotational force of the driving wheel set into a linear motion and transmit to the movable rod body, and a conversion unit to convert between the first driving unit and the second driving unit, the conversion unit to transmit the rotational force of the driving wheel set to the first driving unit or the second driving unit.

Further, the first transmission unit comprises a first worm and a second worm which are arranged in parallel, and a turbine arranged between the first worm and the second worm, and one end, far away from the nail anvil assembly, of the movable pipe body is fixed on the worm;

The second transmission unit comprises a screw rod and a transmission rod which are arranged in parallel, a linear gear which is connected with the screw rod in a threaded manner, and a rotary gear which is arranged on the transmission rod, wherein one end of the screw rod is connected with the movable pipe body through an axial limiting structure, and the other end of the screw rod is connected with the holding shell or the outer sleeve through a second circumferential limiting structure;

The conversion unit is arranged between the second worm and the transmission rod, and is driven by external force to be selectively connected with one of the second worm and the transmission rod so as to transmit the rotation force to the second worm or the transmission rod.

The application has the beneficial effects that the nail anvil assembly has an unfolding structure and a folding structure, when the nail anvil assembly is in the folding structure, the area of the inserting opening is reduced, so that the nail anvil assembly is convenient to enter a human body, after the nail anvil assembly is in the unfolding structure, the nail anvil assembly is driven to move towards the suture surface by the closing rod assembly to realize closing, and when the nail anvil assembly is in the state, the nail anvil assembly is always connected with the closing rod assembly, so that the nail anvil assembly and the closing rod assembly do not need to be inserted in the operation process, the operation process is simplified, and the operation difficulty is reduced.

The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a portion of an integrated tubular stapler according to an embodiment of the present invention in a deployed configuration;

FIG. 2 is a schematic view of a portion of the anvil assembly and closure bar assembly of FIG. 1;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

Fig. 4 is an enlarged view of a part of the structure in fig. 2;

FIG. 5 is an exploded view of a portion of the structure shown in FIG. 2;

FIG. 6 is an exploded view of the structure of FIG. 2 in another direction;

FIG. 7 is a cross-sectional view of the structure shown in FIG. 2;

FIG. 8 is a schematic view of the structure of FIG. 2 in a partially folded configuration;

FIG. 9 is a schematic view of the structure of FIG. 8 in a fully collapsed condition;

FIG. 10 is an enlarged view of a portion of the closure bar assembly of FIG. 1;

fig. 11 is an exploded view of a portion of the structure of fig. 10.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1 and 2, an integrated tubular stapler according to an embodiment of the present invention includes a shaft assembly 10, a grip assembly 20 disposed at one end of the shaft assembly 10, a cartridge barrel assembly 30 disposed at the other end of the shaft assembly 10, and an anvil assembly 40. For convenience of the following description, a direction indicated by an arrow a in fig. 1 is defined as a lower direction with reference to fig. 1.

The shaft assembly 10 includes a grip housing 20, a power source (not shown) disposed within the grip housing 20, and a control member (not shown) that drives the power source to perform work. The integrated tubular anastomat is electrically controlled by the power source, the control element is a switch arranged on the holding shell 20, the switch can be any one of a button, a touch piece and a knob, the control element is used for controlling the power source to move, and the power source is a motor and is used for outputting rotating force. A control assembly (not shown) is also provided within the grip housing 20, and both the switch and motor are electrically connected to the control assembly.

The shaft assembly 10 includes an outer sleeve 11 having one end fixed to the grip housing 20, and a closing rod assembly 12 and a firing rod assembly (not shown) disposed within the outer sleeve 11. The outer sleeve 11 is relatively static with the holding shell 20, the closing rod assembly 12 and the firing rod assembly move in the outer sleeve 11, and the closing rod assembly 12 and the firing rod assembly are connected with a motor and receive the driving force of the motor so as to execute corresponding movement.

The cartridge barrel assembly 30 may employ a prior art technique that generally includes a cartridge housing 31 mounted on the other end of the outer sleeve 11, an annular cartridge body (not shown) disposed within the cartridge housing 31, staples (not shown) disposed within the annular cartridge body, staple pusher plates (not shown) located below the staples, and an annular cutter (not shown) disposed inside the annular cartridge body. The annular cartridge body has a stapling face (not shown), and a plurality of staple cavities (not shown) are formed in the annular cartridge body, and penetrate through the stapling face. The stitching nails are arranged in the stitching nail cavities, and the stitching nails move towards the stitching face direction through the stitching nail pushing sheets below the stitching nails to realize stitching. The cartridge housing 31, the annular cartridge body, and the annular cutter are coaxially arranged. The firing bar assembly extends into the cartridge housing 31 and abuts against the underside of the staple pusher to urge the staple pusher toward the stapling surface of the annular cartridge. The closure bar assembly 12 passes through one end of the cartridge barrel assembly 30 (the end distal from the stapling surface) to the other end of the cartridge barrel assembly 30 (the end of the stapling surface) to connect with the anvil assembly 40.

Anvil assembly 40 has an expanded configuration (as shown in fig. 1 and 2) and a collapsed configuration (as shown in fig. 9). The anvil assembly 40 has formed thereon a plurality of staple pockets (not shown) all of which face the stapling surface of the annular cartridge body in the deployed configuration. The closure bar assembly 12 is coupled to the anvil assembly 40 through the cartridge barrel assembly 30, and the closure bar assembly 12 drives the anvil assembly 40 between an extended configuration and a collapsed configuration, wherein the anvil assembly 40 is always coupled to the closure bar assembly 12 in the extended configuration, the collapsed configuration, and when transitioning between the extended configuration and the collapsed configuration.

The above-described unfolded configuration and folded configuration are described as states, i.e., the unfolded configuration is an unfolded state, and the folded configuration is a folded state. When the anvil assembly 40 is in the folded state, the anvil assembly 40 is folded (see fig. 9), and the folded volume in the radial direction and the volume in the unfolded state become smaller. Because the anvil assembly 40 has the unfolding structure and the folding structure, that is, the anvil assembly 40 is foldable, when the anvil assembly 40 is in the folding structure, the area of the insertion opening of the anvil assembly is reduced, so that the anvil assembly 40 is convenient to be inserted into a human body, when the anvil assembly is in the unfolding structure, the anvil assembly 40 is driven to move towards the suture surface by the closing rod assembly 12 to realize the closing, and when the anvil assembly 40 is in the two states, the anvil assembly 40 is always connected with the closing rod assembly 12 of the closing rod assembly, so that the anvil assembly 40 and the closing rod assembly 12 of the closing rod assembly do not need to be inserted in the operation process, the operation process is simplified, and the operation difficulty is reduced.

Referring to fig. 3 to 6, in an embodiment, the anvil assembly 40 includes a base 41 and a plurality of turnover parts 42 pivotally connected to the base 41, wherein a pit is formed on the turnover parts 42, and the closing lever assembly 12 drives the turnover parts 42 to turn over with respect to the base 41. The turnover part 42 may be pulled by a pulling member to be turned downward with respect to the base 41 and maintain the turned state. As an alternative, the traction member may be a traction wire which pulls the turnover part 42 downward to turn downward relative to the base 41 to realize folding, specifically, one end of the traction wire is connected to the turnover part 42, and the other end of the traction wire passes out from the inside of the closing rod assembly 12. In order to achieve the transition of the turndown 42 from the folded configuration to the unfolded configuration, or to maintain the unfolded configuration, an elastic member such as a torsion spring is provided between the turndown 42 and the base 41 to drive the turndown 42 to fold up with respect to the base 41, and when the downward pulling force of the traction wire on the turndown 42 is removed, the turndown 42 is folded up with respect to the base 41 by the driving of the elastic member to transition to the unfolded configuration and to maintain the unfolded configuration by the elastic member.

In this embodiment, the turnover of the turnover part 42 relative to the base 41 is driven by a traction rod, specifically, the closing rod assembly 12 includes a fixed tube 121, a movable tube 122 sleeved with the fixed tube 121, and a traction rod 123 with two ends respectively hinged to the movable tube 122 and the turnover part 42. The base 41 is fixed to the fixed pipe 121, and the movable pipe 122 is movable in the fixed pipe 121 in the axial direction of the fixed pipe 121. In this embodiment, the fixed pipe body 121 is sleeved on the outer side of the movable pipe body 122, the movable pipe body 122 is sleeved with a collar 124, the collar 124 can rotate relative to the movable pipe body 122, specifically, an annular groove 1221 is formed on the movable pipe body 122, and the collar 124 is fixed in the annular groove 1221. The movable tube 122 is hinged to the drawbar 123 by a collar 124. The fixed tube 121 is formed with a plurality of slots 1211 extending in the axial direction, and the collar 124 is formed with a protruding rod portion 1241 protruding therefrom for hinging with the traction rod 123. The male rod portion 1241 passes through the slot 1211 and its end is hinged to the drawbar 123. In other embodiments, the collar 124 may be hinged by a drawbar 123 through a slot 1211.

In the above embodiment, the turnover part 42 has a fan-shaped structure, and in other embodiments, the turnover part 42 may have other structures. Because the circumference of the turnover part 42 needs to be a closed ring structure when the anvil assembly 40 is in the unfolded configuration, after the turnover part 42 is turned up, the turnover parts 42 are adjacently arranged to be spliced to form the closed ring structure, in addition, a connecting structure can be arranged between the two adjacent turnover parts 42, in this embodiment, the anvil assembly 40 further comprises a displacement part 43 capable of moving relative to the base part 41, a nail pit (not shown) is formed on the displacement part 43, and when in the unfolded configuration, the displacement part 43 and the turnover parts 42 are circumferentially arranged at intervals. The displacement portion 43 is a connection structure. Of course, in other embodiments, the connection structure may be other structures, such as a folding portion that can be folded circumferentially, and two sides of the folding portion are respectively connected to two adjacent turnover portions 42. When the turnover part 42 is turned down with respect to the base 41, the folding part is folded in the circumferential direction, and when the turnover part 42 is turned up with respect to the base 41, the folding part is unfolded in the circumferential direction.

The displacement portion 43 is driven by the movable tube 122, so that the overall structure is more compact, and in particular, the movable tube 122 can rotate relative to the fixed tube 121, the base 41 is provided with a toothed ring structure 44, and a first circumferential limiting structure is disposed between the toothed ring structure 44 and the movable tube 122. The toothed ring structure 44 includes a toothed ring 441, a limiting plate 442 coaxially disposed with the toothed ring 441, and a first connecting rod 443 connecting the toothed ring 441 and the limiting plate 442. In the axial direction, the limiting piece 442 is located at an upper side of the toothed ring 441, and the first link 443 includes an extension 4421 formed to extend outward in a radial direction of the limiting piece 442 and a bent portion 4422 extending downward from an end of the extension 4421 to be connected to an upper surface of the toothed ring 441. The movable tube 122 drives the ring gear structure 44 to rotate relative to the base 41, and the displacement portion 43 has a plate body portion 431 and a rack portion 432 extending from the plate body portion 431 in the radial direction of the base 41, the rack portion 432 being disposed above the plate body portion 431 and protruding out of the rack portion 432. A pinion 45 for transmission is provided between the rack portion 432 and the ring gear structure 44, and the pinion 45 is fixed to the base 41 by a shaft.

The base 41 includes a positioning ring 411, a cover plate 412 covering the positioning ring 411, and a positioning slide plate 413 formed to extend radially outward from an outer circumferential surface of the positioning ring 411. The plate body 431 is disposed below the positioning ring 411 and the positioning slide plate 413, wherein the positioning ring 411 is formed with a relief groove 414 extending in a radial direction through which the rack portion 432 passes. The rack portion 432 and the positioning slide plate 413 are disposed one by one and are in sliding fit, specifically, a sliding groove (not numbered) is formed on one of the rack portion 432 and the positioning slide plate 413, a sliding block (not numbered) is formed on the other of the rack portion 432 and the positioning slide plate 413, and the rack portion 432 and the positioning slide plate 413 can be prevented from being separated on the axis by the sliding groove and the sliding block being matched, and the rack portion 432 can move in the radial direction relative to the positioning slide plate 413. The toothed ring 441 is coaxial with the positioning ring 411 and is located at the inner side of the positioning ring 411, a toothed portion (not numbered) is formed on the outer circumference of the toothed ring 441 facing the positioning ring 411, the micro gear 45 is fixed under the cover plate 412, is located between the toothed ring 441 and the positioning ring 411, and protrudes downward out of the positioning ring 411 to be engaged with the rack portion 432.

The axis limiting structure includes a shaped insertion slot 46 formed on the limiting plate 442 and a shaped insertion portion 1222 formed on the movable tube 122 to be in butt joint with the shaped insertion slot 46, wherein the insertion direction between the shaped insertion slot 46 and the shaped insertion portion 1222 is the same as the axis direction, and in this embodiment, the shaped insertion slot 46 is a plum blossom slot.

In the unfolded configuration, the surface of the displacement portion 43 forming the pit is on the same plane as the surface of the turnover portion 42 forming the pit. The turnover part 42 is pivoted below the positioning ring 411. The fixed tube 121 is connected to the positioning ring 411 by a second link 1212. In this embodiment, the fixed tube 121, the second link 1212, and the positioning ring 411 are one component formed by integral injection molding. The fixed tube 121 is further formed with a escape window 1213, and a portion of the rack portion 432 protruding from the plate body 431 is inserted into the escape window 1213 in the folded configuration.

When the nail anvil assembly 40 is not in use, the driving principle of the nail anvil assembly 40 in the folded structure is that the nail anvil assembly is converted into the unfolded structure (shown in fig. 3) by the folded structure (shown in fig. 9) is that the movable tube 122 is driven to move towards the nail anvil assembly 40 relative to the fixed tube 121, at the moment, the convex rod part 1241 moves upwards in the slot 1211, the turnover part 42 is turned upwards to be opened by the action of the traction rod 123, the state is converted into the state of fig. 8 from the state of fig. 9, after the turnover part 42 is opened, the special-shaped inserting part 1222 of the movable tube 122 is also inserted into the special-shaped inserting groove 46, then the movable tube 122 is driven to rotate in the fixed tube 121, and the special-shaped inserting part 1222 and the special-shaped inserting groove 46 are limited in the circumferential direction, so that the movable tube 122 drives the toothed ring structure 44 to rotate, and then drives the micro gear 45 to rotate, and the displacement part 43 moves outwards in the radial direction by the cooperation between the micro gear 45 and the rack, so as to realize the unfolding of the displacement part 43, and the state of fig. 8, and the state of fig. 3 are converted into the unfolded state.

Referring to fig. 6 and 7, in the present embodiment, an axial positioning structure is disposed between the fixed tube 121 and the movable tube 122, and when the anvil assembly 40 is in the deployed configuration, the movable tube 122 drives the fixed tube 121 to move toward the stitching surface through the axial positioning structure, so as to move the anvil assembly 40 toward the stitching surface to achieve the closing. Specifically, the axial positioning structure includes at least two pressing blocks 1223 formed on the movable tube 122 and a pressing block 1214 formed in the fixed tube 121 and disposed corresponding to the pressing blocks 1223. In the circumferential direction, a first movement gap (not numbered) for movement of the holding block 1214 is provided between two adjacent holding blocks 1223, and a second movement gap (not numbered) for movement of the holding block 1223 is provided between two adjacent holding blocks 1214.

When the anvil assembly 40 is in the folded state, the abutment block 1223 is axially below the abutment block 1214. When the turnover part 42 is turned upward, the pressing block 1223 moves upward along with the movable pipe 122, the pressing block 1223 moves to the upper side of the pressing block 1214 through the second gap, and the pressing block 1214 becomes the lower side of the pressing block 1223 through the first gap, so that the relative positions of the pressing block 1223 and the pressing block 1214 are interchanged, but at this time, the pressing block 1223 and the pressing block 1214 are offset in the projection in the axial direction. When the displacement portion 43 moves outward, the pressing block 1223 rotates with the movable tube 122 relative to the pressing block 1214, and moves directly above the pressing block 1214. When the anvil assembly 40 is in the deployed configuration, the pressing block 1223 is located above the pressing block 1214 and abuts against the pressing block 1214, so that when the movable tube 122 moves in the direction of the stitching surface, the movable tube 122 will drive the fixed tube 121 to move due to the axial cooperation of the pressing block 1223 and the pressing block 1214, and the fixed tube 121 is fixed with the base 41, so that the fixed tube 121 will drive the base 41 to move downward, thereby moving the anvil assembly 40 in the direction of the stitching surface to achieve the closing.

In this embodiment, a fixed sleeve 13 is fixed in the outer sleeve 11, one end of the fixed tube 121 far from the base 41 is inserted into the fixed sleeve 13, a spring (not shown) is disposed in the fixed sleeve 13, and the spring abuts against one end of the fixed sleeve far from the base 41 at the lower side. The movable tube 122 is located inside the fixed sleeve 13 and passes through the fixed tube 121, and the movable tube 122 is not in contact with the fixed sleeve 13. When the nail anvil is not closed (namely, in an initial state), the spring is in a normal state and is pressed against the fixed sleeve 13 upwards, and when the nail anvil is converted from the non-closed state to the closed state, the movable tube 122 drives the fixed tube 121 to move downwards under the axial cooperation of the pressing block 1223 and the pressing block 1214, and the fixed tube 121 moves in the fixed sleeve 13 and compresses the spring.

Referring to fig. 2, 10 and 11, in the present embodiment, the anvil assembly 40 is driven by different movement states of the movable tube 122 from the unfolded configuration to the folded configuration and the closing is achieved, and in order to make the overall structure more compact and control simpler, in an embodiment, the closing lever assembly 12 further includes a driving wheel set 124 for transmitting the rotation force of the power source, a first driving unit 125 for transmitting the rotation force of the driving wheel set 124 to the movable tube 122, a second driving unit 126 for converting the rotation force of the driving wheel set 124 into a linear motion and transmitting to the movable rod body, and a converting unit 127 for converting between the first driving unit 125 and the second driving unit 126. The conversion unit 127 is used for transmitting the rotation force of the transmission wheel set 124 to the first transmission unit 125 or the second transmission unit 126.

The first transmission unit 125 includes a first worm 1251 and a second worm 1252 disposed in parallel, and a worm wheel 1253 disposed between the first worm 1251 and the second worm 1252. The end of the movable tube 122 remote from the anvil assembly 40 is secured to a first worm 1251. In this embodiment, the movable tube 122 penetrates through the first worm 1251, and the end of the movable tube 122 is abutted against the second transmission unit 126, specifically, a square through hole (not shown) is formed in the first worm 1251, and the portion of the movable tube 122 inserted into the square through hole is a square rod body corresponding to the square through hole. The turbine 1253 is fixed to the outer sleeve 11 by a shaft.

The second transmission unit 126 includes a screw 1261 and a transmission rod 1262 arranged in parallel, a linear gear 1263 screwed on the screw 1261, and a rotation gear 1264 mounted on the transmission rod 1262. The drive post 1262 is coaxially disposed with the second worm 1252, with the second worm 1252 being located on a front side of the drive post 1262 with a space therebetween. One end of the screw rod 1261 is connected with the movable pipe body 122 through an axial limiting structure, and the other end is connected with the holding shell 20 through a second circumferential limiting structure. In this embodiment, the axial limiting structure includes a docking groove (not shown) formed to be recessed from an end surface of the screw rod 1261, a snap-in block (not shown) formed to protrude inward from an inner side wall of the docking groove, a docking portion (not shown) formed on an end of the movable tube 122 to be inserted into the docking groove, and an annular snap-in groove (not shown) formed to be recessed inward from a circumferential surface of the docking portion. The clamping block is clamped into the annular clamping groove. In the axial direction, the clamping block is positioned at the outer side of the butt joint groove. The second circumferential limit structure includes a limit post 1265 provided on one of the grip housing 20 and the screw 1261 and a limit groove (not shown) formed on the other. The limit groove extends in the axial direction of the grip housing 20, and the axis of the limit post 1265 is perpendicular to the axial direction of the grip housing 20. The two ends of the limiting rod 1265 are inserted into limiting grooves, in this embodiment, the limiting grooves are two arranged on the inner side wall of the holding shell 20, and the limiting rod 1265 is vertically fixed at the end of the screw rod 1261. In other embodiments, the limiting groove may also be disposed on the outer sleeve 11.

The switching unit 127 is disposed between the second worm 1252 and the driving rod 1262, and is selectively connected to one of the second worm 1252 and the driving rod 1262 by being driven by an external force to transmit a rotational force to the second worm 1252 or the driving rod 1262. The shift unit 127 includes a rotary sleeve 1271 fitted over the transmission rod 1262 and rotatable relative to the transmission rod 1262, a first mating portion 1272 formed on the transmission rod 1262, a second mating portion 1273 formed on the second worm 1252, and a shift switch 1274 fitted over the rotary sleeve 1271 and slidable over the rotary sleeve 1271. In the axial direction, the first mating portion 1272 is located above the rotating sleeve 1271. The switch 1274 moves up with the rotary sleeve 1271 to interface with the first mating portion 1272, the second mating portion 1273 to achieve a circumferential lock. Specifically, the first mating portion 1272 is a first protrusion 1272 protruding from the driving rod 1262, and the second mating portion 1273 is a second protrusion 1273 protruding from the second worm 1252. The switch 1274 includes a slip ring 12741 that is sleeved on the rotary sleeve 1271, and a third protrusion 12742 is formed in the slip ring 12741. The circumferential lock is achieved by switching the movement of the switch 1274 on the rotating sleeve 1271 such that the third protrusions 12742 are circumferentially abutted with the first protrusions 1272 or the second protrusions 1273, respectively.

The drive pulley set 124 includes a drive gear 1241 mounted on an output shaft of a power source (e.g., a motor) and a driven gear 1242 meshed with the drive gear 1241. The driven gear 1242 is fixed to the rotary sleeve 1271. The rotary sleeve 1271 has a slide groove 1275 extending in the axial direction of the sleeve, and a slide block (not shown) inserted into the slide groove 1275 is formed in the slide ring 12741 and is located behind (below) the third boss 12742. The matching of the sliding groove 1275 and the sliding block prevents the sliding ring 12741 from rotating circumferentially relative to the rotating sleeve 1271, so when the driving gear 1241 drives the driven gear 1242 to rotate, the driven gear 1242 drives the rotating sleeve 1271, and when the switch 1274 is in butt joint with the transmission rod 1262 or the second worm 1252, the rotating sleeve 1271 can drive the transmission rod 1262 or the second worm 1252 to rotate, so as to realize the transmission of the rotation force of the power source to the transmission rod 1262 or the second worm 1252. The switch 1274 further includes a wave plate ring 12743 that fits over the slip ring 12741. The slip ring 12741 has annular grooves 12754 formed in a concave shape, and the wave plate ring 12743 is fixed in the annular grooves 12754 so arranged that the wave plate ring 12743 and the slip ring 12741 can rotate relatively. The outer sleeve 11 is provided with a toggle groove 111 (see fig. 1) protruding the wave plate ring 12743, and the toggle groove 111 extends along the axial direction of the outer sleeve 11. Wave plate ring 12743 has a first position (shown in fig. 1) in which third tab 12742 abuts first tab 1272 and a second position (shown in fig. 1) in which third tab 12742 abuts second tab 1273.

The drive principle of the closure bar assembly 12 to transfer driving force to the movable tubular body 122 to convert the anvil assembly 40 from the folded configuration to the unfolded configuration is as follows:

The wave plate ring 12743 is located at the first position (initial position), the third protruding block 12742 is abutted against the first protruding block 1272, at this time, the motor rotates positively, the driving gear 1241 drives the driven gear 1242 to rotate under the driving of the rotating force, so that the rotating sleeve 1271 rotates, because the third protruding block 12742 abuts against the first protruding block 1272, at this time, the rotating sleeve 1271 drives the transmission rod 1262 to rotate, under the driving of the linear gear 1263, the screw rod 1261 moves linearly, and moves upwards, and because the screw rod 1261 is connected with the movable tube 122, the screw rod 1261 pushes the movable tube 122 to move upwards (i.e. move towards the anvil assembly 40), then the protruding rod 1241 moves upwards in the slot 1211, the turnup part 42 is turned upwards under the action of the traction rod 123, so that the turnup part 1222 of the movable tube 122 is inserted into the shaped inserting slot 46 after the turnup part 42 is opened.

The wave plate ring 12743 is shifted from the first position to the second position under the action of external force, the third protruding block 12742 is abutted against the second protruding block 1273, at this time, the driving gear 1241 is driven by the rotation force to rotate the driven gear 1242, so that the rotating sleeve 1271 rotates, the third protruding block 12742 is abutted against the second protruding block 1273, the rotating sleeve 1271 drives the second worm 1252 to rotate, the first worm 1251 rotates under the transmission of the turbine 1253, and the first worm 1251 and the movable tube 122 are in circumferential limit due to the cooperation of the square through hole and the square rod body, the first worm 1251 drives the movable tube 122 to rotate, then the movable tube 122 drives the toothed ring structure 44 to rotate, so that the micro gear 45 rotates, and then the displacement portion 43 moves radially outwards due to the cooperation between the micro gear 45 and the rack, so that the anvil assembly is converted into the unfolded configuration. .

The drive principle of the closure bar assembly 12 to transmit driving force to the movable tubular body 122 to close the anvil assembly 40 is as follows:

When the anvil assembly is in the unfolded configuration, the wave plate ring 12743 is shifted from the second position to the first position under the action of external force, the third protruding block 12742 is abutted against the first protruding block 1272, at this time, the motor is reversed, the driving gear 1241 drives the driven gear 1242 to reversely rotate under the driving of the rotating force, so that the rotating sleeve 1271 reversely rotates, the rotating sleeve 1271 drives the transmission rod 1262 to reversely rotate due to the abutting of the third protruding block 12742 and the first protruding block 1272, the screw rod 1261 moves linearly under the transmission of the linear gear 1263, and the screw rod 1261 moves downwards due to the connection of the screw rod 1261 and the movable tube 122, so that the screw rod 1261 pulls the movable tube 122 to move downwards, and the anvil assembly is closed.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. An integrated tubular anastomat, characterized by comprising the following steps:

2. The integrated tubular stapler of claim 1, wherein said anvil assembly includes a base and a plurality of folds pivotally connected to said base, said folds being formed with said staple pockets, said closure bar assembly driving said folds to fold relative to said base.

3. The integrated tubular anastomat according to claim 2, wherein the closing rod assembly comprises a fixed tube body, a movable tube body sleeved with the fixed tube body, and a traction rod with two ends respectively hinged on the movable tube body and the turnover part, the base part is fixed on the fixed tube body, and the movable tube body can move in the fixed tube body along the axial direction of the fixed tube body.

4. The integrated tubular stapler of claim 3, wherein said anvil assembly further includes a displacement portion movable relative to said base portion, said displacement portion having said staple pockets formed thereon, said displacement portion and said turnover portion being circumferentially spaced apart in said deployed configuration.

5. The integrated tubular anastomat according to claim 4, wherein the movable tube body can rotate relative to the fixed tube body, a toothed ring structure is arranged on the base, a first circumferential limiting structure is arranged between the toothed ring structure and the movable tube body, the movable tube body drives the toothed ring structure to rotate relative to the base, the displacement part is provided with a rack part extending along the radial direction of the base, a micro gear for transmission is arranged between the rack part and the toothed ring structure, and the micro gear shaft is fixed on the base.

6. The integrated tubular anastomat according to claim 5, wherein the fixed tube body is sleeved on the outer side of the movable tube body, a plurality of slots extending along the axial direction are formed on the fixed tube body, a collar is sleeved on the movable tube body, the collar can rotate relative to the movable tube body, and the movable tube body is hinged with the traction rod through the collar;

7. The integrated tubular stapler of claim 6, wherein an axial positioning structure is provided between the fixed tubular body and the movable tubular body, wherein the movable tubular body moves the fixed tubular body toward the stapling surface via the axial positioning structure when the anvil assembly is in the deployed configuration.

8. The integrated tubular anastomat according to claim 7, wherein at least two pressing blocks are formed on the movable tube body, pressing blocks which are arranged corresponding to the pressing blocks are formed in the fixed tube body, a first moving gap for moving the pressing blocks is formed between two adjacent pressing blocks in the circumferential direction, a second moving gap for moving the pressing blocks is formed between two adjacent pressing blocks, and the pressing blocks are located above the pressing blocks and are abutted against the pressing blocks when the nail anvil assembly is in an unfolding structure.

9. The integrated tubular stapler of claim 7, wherein the closing lever assembly includes a transmission gear set to transmit a rotational force of the power source, a first transmission unit to transmit the rotational force of the transmission gear set to the movable tube body, a second transmission unit to convert the rotational force of the transmission gear set into a linear motion and transmit to the movable lever body, and a conversion unit to convert between the first transmission unit and the second transmission unit, the conversion unit to transmit the rotational force of the transmission gear set to the first transmission unit or the second transmission unit.

10. The integrated tubular stapler of claim 9, wherein said first transmission unit includes a first worm and a second worm disposed in parallel, and a worm gear disposed between said first worm and second worm, one end of said movable tubular body remote from said anvil assembly being secured to said worm;