Integrated tubular stapler

Abstract

This invention relates to an integrated tubular stapler, belonging to the field of medical devices. The anvil and stapler body of this stapler are an integral structure, unlike the case where the anvil and stapler body are separate. The anvil assembly of the stapler has two states: a folded structure and an unfolded structure, and can switch between the two states. When the anvil assembly is in the folded structure, the area of ​​its insertion port is reduced, which facilitates the insertion of the anvil assembly into the human body. When it is in the unfolded structure, the anvil assembly is driven by the closing rod assembly to move towards the suture surface to achieve closure. Since the anvil assembly is always connected to the closing rod assembly in the above states, there is no need for the anvil assembly and the closing rod assembly to be inserted during the operation, simplifying the operation process and reducing the difficulty of the operation.

Description

Technical Field

[0001] This invention relates to an integrated tubular stapler, belonging to the field of medical devices. Background Technology

[0002] Tubular staplers are mainly used for transection and suturing in esophageal, gastrointestinal, and colorectal surgeries. Existing tubular staplers consist of a stapler body and an anvil assembly, which is detachably connected to the stapler body. Before surgery, the anvil assembly and the stapler body are two independent components. During surgery, the anvil assembly and the stapler body extend from the two cutting surfaces of the tissue. Then, the rod of the anvil assembly is aligned with the staple holder of the stapler body. After alignment, a closing lever drives the anvil assembly to move towards the staple holder, achieving closure.

[0003] Since the anvil assembly and the stapler body need to be inserted into the human body before anastomosis can be performed, and the operating space in the abdominal or thoracic cavity is limited and the field of vision is restricted during the operation, the operator is prone to problems with insertion, which affects the progress of the operation.

[0004] In addition, colorectal surgery requires opening the severed intestinal stump, inserting an anvil, and suturing it again before the anvil and stapler body can be connected and anastomosed. The process is complicated and time-consuming.

[0005] Therefore, how to solve the difficulty of insertion to improve the surgical progress and reduce the number of surgical steps (such as omitting opening the severed intestinal stump, inserting the anvil, and suturing again), for example, by providing an integrated tubular anastomosis device that simplifies the surgical process and reduces the difficulty of surgical operation, is one of the technical problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated tubular stapler that simplifies the surgical procedure and reduces the difficulty of surgical operation.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an integrated tubular stapler, comprising:

[0008] The grip assembly includes a grip housing, a power source disposed within the grip housing, and a control component for controlling the operation of the power source;

[0009] The shaft assembly includes an outer tube with one end fixed to the grip housing, a closing rod assembly disposed within the outer tube, and a firing rod assembly;

[0010] The staple cartridge assembly includes a cylindrical shell mounted on the other end of the outer sleeve, an annular cartridge disposed within the cylindrical shell, staples disposed within the annular cartridge, a staple pusher located below the staples, and an annular cutter disposed inside the annular cartridge; and

[0011] An anvil assembly has an unfolded configuration and a folded configuration. The anvil assembly has a plurality of nail pits formed thereon. In the unfolded configuration, all the nail pits face the stitching surface of the annular chamber. A closing rod assembly passes through the staple cartridge assembly and is connected to the anvil assembly. The closing rod assembly drives the anvil assembly to switch between the unfolded configuration and the folded configuration. The anvil assembly is always connected to the closing rod assembly when it is in the unfolded configuration, the folded configuration, and when switching between the unfolded and folded configurations.

[0012] Furthermore, the anvil assembly includes a base and a plurality of folded portions pivotally connected to the base, wherein the folded portions have the nail pits formed thereon, and the closing rod assembly drives the folded portions to fold relative to the base.

[0013] Furthermore, the closing rod assembly includes a fixed tube body, a movable tube body sleeved with the fixed tube body, and a traction rod with both ends hinged to the movable tube body and the folding part, respectively. The base is fixed to the fixed tube body, and the movable tube body can move along the axial direction of the fixed tube body within the fixed tube body.

[0014] Furthermore, the anvil assembly also includes a displacement portion that can move relative to the base, the displacement portion having the nail pit formed thereon, and in the unfolded configuration, the displacement portion and the folding portion are arranged at intervals along the circumference.

[0015] Furthermore, the movable tube body is rotatable relative to the fixed tube body, a toothed ring structure is provided on the base, a first circumferential limiting structure is provided 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 has a rack part extending radially along the base, a micro gear for transmission is provided between the rack part and the toothed ring structure, and the micro gear shaft is fixed on the base.

[0016] Furthermore, the fixed tube is sleeved on the outside of the movable tube, and a plurality of slots extending along the axial direction are formed on the fixed tube. A collar is sleeved on the movable tube, and the collar can rotate relative to the movable tube. The movable tube is hinged to the traction rod through the collar.

[0017] The collar has a protruding portion for hinged connection with the traction rod, the protruding portion passing through the slot; or, the traction rod passes through the slot to hinge with the collar.

[0018] Furthermore, the closing rod assembly includes a transmission wheel set for transmitting the rotational force of the power source, a first transmission unit for transmitting the rotational force of the transmission wheel set to the movable tube, a second transmission unit for converting the rotational force of the transmission wheel set into linear motion and transmitting it to the movable rod, and a conversion unit for switching between the first transmission unit and the second transmission unit, wherein the conversion unit is used to transmit the rotational force of the transmission wheel set to the first transmission unit or the second transmission unit.

[0019] Furthermore, the first transmission unit includes a first worm and a second worm arranged in parallel, and a turbine disposed between the first worm and the second worm, wherein one end of the movable tube away from the anvil assembly is fixed to the worm;

[0020] The second transmission unit includes a lead screw and a transmission rod arranged in parallel, a linear gear threaded onto the lead screw, and a rotary gear mounted on the transmission rod. One end of the lead screw is connected to the movable tube body through an axial limiting structure, and the other end is connected to the gripping housing or outer sleeve through a second circumferential limiting structure.

[0021] The conversion unit is disposed between the second worm and the transmission rod, and is selectively connected to one of the second worm and the transmission rod by external force to transmit the rotational force to the second worm or the transmission rod.

[0022] The beneficial effects of the present invention are as follows: The anvil assembly of this application has an unfolded structure and a folded structure. When it is in the folded structure, the area of ​​its insertion port will be reduced, which facilitates the insertion of the anvil assembly into the human body. When it is in the unfolded structure, the anvil assembly is driven by the closing rod assembly to move toward the suture surface to achieve closure. Since the anvil assembly is always connected to the closing rod assembly in the above state, there is no need to insert the anvil assembly and the closing rod assembly during the operation, which simplifies the operation and reduces the difficulty of the operation.

[0023] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a partial structural diagram of an integrated tubular stapler in its unfolded configuration according to an embodiment of the present invention.

[0025] Figure 2 for Figure 1 A partial structural diagram of the anvil assembly and the closing rod assembly in the diagram;

[0026] Figure 3 for Figure 2 A schematic diagram of the middle section structure;

[0027] Figure 4 for Figure 2 Enlarged view of some of the structures in the image;

[0028] Figure 5 for Figure 2 Partial structural exploded view of the structure shown;

[0029] Figure 6 for Figure 2 An exploded view of the structure shown in another direction;

[0030] Figure 7 for Figure 2 A cross-sectional view of the structure shown;

[0031] Figure 8 for Figure 2 The diagram shows a partially folded structure.

[0032] Figure 9 for Figure 8 The diagram shows the structure when it is fully folded.

[0033] Figure 10 for Figure 1 Enlarged view of the closing rod assembly in the middle;

[0034] Figure 11 for Figure 10 An exploded view of the middle part of the structure. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Please see Figure 1 and Figure 2 An embodiment of the present invention illustrates an integrated tubular stapler comprising a rod assembly 10, a gripping assembly 20 disposed at one end of the rod assembly 10, a staple cartridge assembly 30 disposed at the other end of the rod assembly 10, and a staple anvil assembly 40. For ease of subsequent description, the following will refer to... Figure 1 From the baseline perspective, Figure 1 The direction indicated by the middle arrow 'a' is defined as downwards.

[0037] The rod assembly 10 includes a gripping housing 20, a power source (not shown) disposed within the gripping housing 20, and a control component (not shown) that drives the power source to perform operations. The integrated tubular anastomosis device is electrically controlled via this power source. The control component is a switch disposed on the gripping housing 20; this switch can be any of a button, touch panel, or knob. The control component controls the movement of the power source, which is a motor, and outputs rotational force. The gripping housing 20 also houses a control assembly (not shown), and both the switch and the motor are electrically connected to the control assembly.

[0038] The lever assembly 10 includes an outer tube 11 fixed at one end to the grip housing 20, and a closing lever assembly 12 and a firing lever assembly (not shown) disposed within the outer tube 11. The outer tube 11 is stationary relative to the grip housing 20, while the closing lever assembly 12 and the firing lever assembly move within the outer tube 11. The closing lever assembly 12 and the firing lever assembly are connected to a motor and receive the driving force of the motor to perform the corresponding movements.

[0039] The staple cartridge assembly 30 can employ existing technology and typically includes a housing 31 mounted on the other end of the outer sleeve 11, an annular cartridge (not shown) disposed within the housing 31, staples (not shown) disposed within the annular cartridge, a staple pusher (not shown) located below the staples, and an annular cutter (not shown) disposed inside the annular cartridge. The annular cartridge has a suture surface (not shown), and a plurality of staple cavities (not shown) are formed within the annular cartridge, penetrating the suture surface. The staples are arranged within the staple cavities, and are ejected by the staple pusher below them moving towards the suture surface. The housing 31, the annular cartridge, and the annular cutter are arranged coaxially. A firing rod assembly extends into the housing 31, abutting against the underside of the staple pusher to push it towards the suture surface of the annular cartridge. A closing rod assembly 12 passes through one end of the staple cartridge assembly 30 (the end away from the suture surface) to the other end of the staple cartridge assembly 30 (the end facing the suture surface) to connect with the anvil assembly 40.

[0040] The anvil assembly 40 has an unfolding structure (such as...) Figure 1 and Figure 2 (as shown in the state) and folded structures (such as) Figure 9 (As shown in the diagram). Several nail pits (not shown) are formed on the anvil assembly 40. In the unfolded configuration, all nail pits face the stitching surface of the annular chamber. The closing rod assembly 12 passes through the staple cartridge assembly 30 and connects to the anvil assembly 40. The closing rod assembly 12 drives the anvil assembly 40 to switch between the unfolded and folded configurations. When the anvil assembly 40 is in the unfolded configuration, the folded configuration, and the switching between the unfolded and folded configurations, the anvil assembly 40 is always connected to the closing rod assembly 12.

[0041] The above-described unfolded and folded structures are state descriptions; that is, the unfolded structure represents the unfolded state, and the folded structure represents the folded state. When the anvil assembly 40 is in the folded state, the anvil assembly 40 is folded (see...). Figure 9As shown in the diagram, the volume after folding in the radial direction is smaller than the volume in the unfolded state. Since the anvil assembly 40 has both an unfolded and a folded structure—that is, the anvil assembly 40 is foldable—when it is in the folded structure, the area of ​​its insertion port is reduced, making it easier for the anvil assembly 40 to be inserted into the human body. When it is in the unfolded structure, the anvil assembly 40 is driven towards the suture surface by the closing rod assembly 12 to achieve closure. Because the anvil assembly 40 is always connected to the closing rod assembly 12 in both states, no insertion is required between the anvil assembly 40 and the closing rod assembly 12 during the surgery, simplifying the surgical procedure and reducing the difficulty of the operation.

[0042] Please see Figures 3 to 6 In one embodiment, the anvil assembly 40 includes a base 41 and a plurality of folded portions 42 pivotally connected to the base 41. The folded portions 42 have nail pits formed on them. The closing rod assembly 12 drives the folded portions 42 to fold relative to the base 41. The folded portions 42 can be pulled by a traction member to fold downward relative to the base 41 and maintain this folded state. In an alternative implementation, the traction member can be a traction line, which pulls the folded portions 42 downward relative to the base 41 to achieve a fold. Specifically, one end of the traction line is connected to the folded portion 42, and the other end passes through the closing rod assembly 12. In order to transform the folding part 42 from a folded structure to an unfolded structure, or to keep it in the unfolded structure, an elastic element such as a torsion spring is provided between the folding part 42 and the base 41 to drive the folding part 42 to fold upward relative to the base 41. When the downward pulling force of the traction line on the folding part 42 is removed, the folding part 42 folds upward relative to the base 41 under the drive of the elastic element to transform into an unfolded structure, and is kept in the unfolded structure by the elastic element.

[0043] In this embodiment, the folding of the folding portion 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 its two ends hinged to the movable tube 122 and the folding portion 42, respectively. The base 41 is fixed to the fixed tube 121, and the movable tube 122 can move within the fixed tube 121 along the axial direction of the fixed tube 121. In this embodiment, the fixed tube 121 is sleeved on the outside of the movable tube 122, and a collar 124 is sleeved on the movable tube 122. The collar 124 can rotate relative to the movable tube 122. Specifically, an annular groove 1221 is formed on the movable tube 122, and the collar 124 is fixed within the annular groove 1221. The movable tube 122 is hinged to the traction rod 123 via the collar 124. The fixed tube body 121 has a plurality of slots 1211 extending along the axial direction, and the collar 124 has a protruding rod portion 1241 for hinged connection with the traction rod 123. The protruding rod portion 1241 passes through the slots 1211, and its end is hinged to the traction rod 123. In other embodiments, the traction rod 123 can pass through the slots 1211 to be hinged to the collar 124.

[0044] In the above embodiment, the folding portion 42 is a fan-shaped structure. In other embodiments, the folding portion 42 can also be other structures. Since the circumference of the folding portion 42 needs to be a closed ring structure when the anvil assembly 40 is unfolded, the folding portions 42 are folded upwards and arranged adjacently to form a closed ring structure. In addition, a connecting structure can also be provided between two adjacent folding portions 42. In this embodiment, the anvil assembly 40 also includes a displacement portion 43 that can move relative to the base 41. The displacement portion 43 has nail pits (not shown). When unfolded, the displacement portion 43 and the folding portion 42 are arranged circumferentially at intervals. The displacement portion 43 is the connecting structure. Of course, in other embodiments, the connecting structure can also be other structures, such as a folding portion that can be folded circumferentially, with both sides of the folding portion connected to two adjacent folding portions 42 respectively. When the folding part 42 folds downward relative to the base 41, the folded part is folded in the circumferential direction; when the folding part 42 folds upward relative to the base 41, the folded part is unfolded in the circumferential direction.

[0045] The aforementioned displacement portion 43 is driven by the movable tube 122, which makes the overall structure more compact. Specifically, the movable tube 122 can rotate relative to the fixed tube 121. A toothed ring structure 44 is provided on the base 41, and a first circumferential limiting structure is provided between the toothed ring structure 44 and the movable tube 122. The toothed ring structure 44 includes a toothed ring 441, a limiting piece 442 arranged coaxially with the toothed ring 441, and a first connecting rod 443 connecting the toothed ring 441 and the limiting piece 442. In the axial direction, the limiting piece 442 is located on the upper side of the toothed ring 441. The first connecting rod 443 includes an extension portion 4421 extending radially outward from the limiting piece 442 and a bent portion 4422 extending downward from the end of the extension portion 4421 to connect to the upper surface of the toothed ring 441. The movable tube 122 drives the gear ring structure 44 to rotate relative to the base 41. The displacement part 43 has a plate part 431 and a rack part 432 extending radially from the plate part 431 along the base 41. The rack part 432 is arranged above the plate part 431 and protrudes out of the rack part 432. A micro gear 45 for transmission is provided between the rack part 432 and the gear ring structure 44. The micro gear 45 is fixed to the base 41 by a shaft.

[0046] The base 41 includes a positioning ring 411, a cover plate 412 covering the positioning ring 411, and a positioning slide plate 413 extending radially outward from the outer circumferential surface of the positioning ring 411. A plate body 431 is arranged below the positioning ring 411 and the positioning slide plate 413. The positioning ring 411 has a radially extending clearance groove 414 through which the rack portion 432 passes. The rack portion 432 and the positioning slide plate 413 are paired and slidably engaged. Specifically, one of the rack portion 432 and the positioning slide plate 413 has a groove (unlabeled), and the other has a slider (unlabeled). This groove and slider engagement prevents the rack portion 432 and the positioning slide plate 413 from separating axially, while allowing the rack portion 432 to move radially relative to the positioning slide plate 413. The toothed ring 441 is coaxial with the positioning ring 411 and located inside the positioning ring 411. The toothed ring 441 has teeth (not labeled) formed on the outer circumference of the positioning ring 411. The micro gear 45 is fixed below the cover plate 412, located between the toothed ring 441 and the positioning ring 411, and protrudes downward from the positioning ring 411 to cooperate with the rack portion 432.

[0047] The axial limiting structure includes an irregularly shaped insertion groove 46 formed on the limiting piece 442 and an irregularly shaped insertion part 1222 formed on the movable tube 122 to mate with the irregularly shaped insertion groove 46. The insertion direction between the irregularly shaped insertion groove 46 and the irregularly shaped insertion part 1222 is the same as the axial direction. In this embodiment, the irregularly shaped insertion groove 46 is a quincunx groove.

[0048] When unfolded, the surface of the displacement portion 43 forming the nail pit and the surface of the folding portion 42 forming the nail pit are on the same plane. The folding portion 42 is pivotally connected to the lower part of the positioning ring 411. The fixing tube 121 is connected to the positioning ring 411 via the second connecting rod 1212. In this embodiment, the fixing tube 121, the second connecting rod 1212, and the positioning ring 411 are formed as a single component by integral injection molding. The fixing tube 121 also has a clearance window 1213, and during folding, the portion of the rack portion 432 protruding from the plate portion 431 is inserted into the clearance window 1213.

[0049] When not in use, the anvil assembly 40 is in a folded configuration, which consists of a folded configuration (such as...) Figure 9 ) is transformed into an expansion construction (such as Figure 3 The driving principle is as follows: the movable tube 122 moves relative to the fixed tube 121 towards the anvil assembly 40. At this time, the protruding rod 1241 moves upward within the slot 1211, and the folding part 42 folds upward to open under the action of the traction rod 123. Figure 9 State transition Figure 8 In the current state, when the folding part 42 is opened, the irregularly shaped insertion part 1222 of the movable tube 122 is also inserted into the irregularly shaped insertion slot 46; then, the movable tube 122 is driven to rotate within the fixed tube 121. Since the irregularly shaped insertion part 1222 and the irregularly shaped insertion slot 46 are circumferentially restricted, the movable tube 122 will drive the gear ring structure 44 to rotate, thereby driving the micro gear 45 to rotate. Subsequently, the engagement between the micro gear 45 and the rack causes the displacement part 43 to move radially outward, thereby realizing the unfolding of the displacement part 43. Figure 8 State, transformed Figure 3 In this state, the anvil assembly 40 is in the deployed configuration.

[0050] Please combine Figure 6 and Figure 7 In this embodiment, an axial positioning structure is provided between the fixed tube 121 and the movable tube 122. When the anvil assembly 40 is in the unfolded configuration, the movable tube 122 drives the fixed tube 121 to move toward the suture surface through the axial positioning structure, thereby causing the anvil assembly 40 to move toward the suture surface to achieve closure. Specifically, the axial positioning structure includes at least two pressing blocks 1223 formed on the movable tube 122 and a supporting block 1214 formed inside the fixed tube 121 and corresponding to the pressing blocks 1223. In the circumferential direction, a first moving gap (unlabeled) is provided between two adjacent pressing blocks 1223 for the supporting block 1214 to move, and a second moving gap (unlabeled) is provided between two adjacent supporting blocks 1214 for the pressing blocks 1223 to move.

[0051] When the anvil assembly 40 is in the folded state, the pressing block 1223 is located below the supporting block 1214 in the axial direction. When the folding part 42 flips upward, the pressing block 1223 moves upward with the movable tube 122, and the pressing block 1223 moves through the second gap to above the supporting block 1214. The supporting block 1214 moves through the first gap to below the pressing block 1223. Thus, the relative positions of the pressing block 1223 and the supporting block 1214 are interchanged. However, at this time, in the axial direction projection, the pressing block 1223 and the supporting block 1214 are misaligned. When the displacement part 43 moves outward, the pressing block 1223 rotates with the movable tube 122 relative to the supporting block 1214 and moves to directly above the supporting block 1214. When the anvil assembly 40 is in the unfolded configuration, the pressing block 1223 is located above and abuts against the supporting block 1214. Thus, when the movable tube 122 moves toward the suture surface, due to the axial cooperation between the pressing block 1223 and the supporting block 1214, the movable tube 122 will drive the fixed tube 121 to move. Since the fixed tube 121 is fixed to the base 41, the fixed tube 121 will drive the base 41 to move downward, thereby causing the anvil assembly 40 to move toward the suture surface to achieve closure.

[0052] In this embodiment, a fixed sleeve 13 is fixed inside the outer sleeve 11. The end of the fixed tube 121 away from the base 41 is inserted into the fixed sleeve 13. A spring (not shown) is provided inside the fixed sleeve 13, and the spring abuts against the end of the fixed sleeve away from the base 41 from below. The movable tube 122 is located inside the fixed sleeve 13 and passes through the fixed tube 121, and the movable tube 122 does not contact the fixed sleeve 13. When the anvil is not closed (i.e., in the initial state), the spring is in the normal state and presses the fixed sleeve 13 upward. When the anvil changes from the open state to the closed state, the movable tube 122, under the axial cooperation of the pressing block 1223 and the holding block 1214, drives the fixed tube 121 to move downward. The fixed tube 121 moves inside the fixed sleeve 13 and compresses the spring.

[0053] Please see Figure 2 and Figure 10 , Figure 11In this embodiment, the transformation of the anvil assembly 40 from an unfolded structure to a folded structure and the achievement of closure are all driven by different motion states of the movable tube 122. To make the overall structure more compact and control simpler, in one embodiment, the closing rod assembly 12 further includes a transmission wheel set 128 for transmitting the rotational force of the power source, a first transmission unit 125 for transmitting the rotational force of the transmission wheel set 128 to the movable tube 122, a second transmission unit 126 for converting the rotational force of the transmission wheel set 128 into linear motion and transmitting it to the movable rod, and a conversion unit 127 for switching between the first transmission unit 125 and the second transmission unit 126. The conversion unit 127 is used to transmit the rotational force of the transmission wheel set 128 to either the first transmission unit 125 or the second transmission unit 126.

[0054] The first transmission unit 125 includes a first worm 1251 and a second worm 1252 arranged in parallel, and a turbine 1253 disposed between the first worm 1251 and the second worm 1252. One end of the movable tube 122, away from the anvil assembly 40, is fixed to the first worm 1251. In this embodiment, the movable tube 122 passes through the first worm 1251, and its end is connected to 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 corresponding square rod. The turbine 1253 is fixed to the outer sleeve 11 by a shaft.

[0055] The second transmission unit 126 includes a lead screw 1261 and a transmission rod 1262 arranged in parallel, a linear gear 1263 threaded onto the lead screw 1261, and a rotary gear 1264 mounted on the transmission rod 1262. The transmission rod 1262 is coaxially arranged with the second worm gear 1252, and the second worm gear 1252 is located in front of the transmission rod 1262, with a gap between them. One end of the lead screw 1261 is connected to the movable tube 122 via an axial limiting structure, and the other end is connected to the gripping housing 20 via a second circumferential limiting structure. In this embodiment, the axial limiting structure includes a mating groove (not shown) formed recessed from the end face of the lead screw 1261, a snap-fit ​​block (not shown) protruding inward from the inner sidewall of the mating groove, a mating portion (not shown) formed on the end of the movable tube 122 to be inserted into the mating groove, and an annular groove (not shown) recessed inward from the circumference of the mating portion. The snap-fit ​​block is engaged in the annular groove. In the axial direction, the snap-fit ​​block is located outside the mating groove. The second circumferential limiting structure includes a limiting rod 1265 disposed on one of the gripping housing 20 and the lead screw 1261, and a limiting groove (not shown) formed on the other. The limiting groove extends along the axial direction of the gripping housing 20, and the axis of the limiting rod 1265 is perpendicular to the axial direction of the gripping housing 20. Both ends of the limiting rod 1265 are inserted into the limiting groove. In this embodiment, there are two limiting grooves disposed on the inner sidewall of the gripping housing 20, and the limiting rod 1265 is vertically fixed to the end of the lead screw 1261. In other embodiments, the limiting groove may also be disposed on the outer sleeve 11.

[0056] A conversion unit 127 is disposed between the second worm gear 1252 and the transmission rod 1262, and is selectively connected to one of the second worm gear 1252 and the transmission rod 1262 by external force to transmit rotational force to either the second worm gear 1252 or the transmission rod 1262. The conversion unit 127 includes a rotating sleeve 1271 sleeved on the transmission rod 1262 and rotatable relative to the transmission rod 1262, a first matching portion 1272 formed on the transmission rod 1262, a second matching portion 1273 formed on the second worm gear 1252, and a switching switch 1274 sleeved on the rotating sleeve 1271 and slidable on the rotating sleeve 1271. In the axial direction, the first matching portion 1272 is located above the rotating sleeve 1271. The switching switch 1274 moves on the rotating sleeve 1271 to mate with the first matching portion 1272 and the second matching portion 1273 to achieve circumferential locking. Specifically, the first matching part 1272 is a first protrusion 1272 extending from the transmission rod 1262, and the second matching part 1273 is a second protrusion 1273 extending from the second worm gear 1252. The switching switch 1274 includes a sliding ring 12741 sleeved on the rotating sleeve 1271, and a third protrusion 12742 is formed inside the sliding ring 12741. By moving the switching switch 1274 on the rotating sleeve 1271, the third protrusion 12742 abuts against the first protrusion 1272 or the second protrusion 1273 in the circumferential direction, thereby achieving circumferential locking.

[0057] The transmission gear set 128 includes a drive gear 1281 mounted on the output shaft of a power source (such as a motor) and a driven gear 1282 meshing with the drive gear 1281. The driven gear 1282 is fixed to a rotating sleeve 1271. A sliding groove 1275 extending axially along the sleeve is formed on the rotating sleeve 1271, and a sliding block (not shown) inserted into the sliding groove 1275 is formed in the sliding ring 12741. The sliding block is located behind (below) the third protrusion 12742. The sliding groove 1275 is matched with the sliding block to prevent the sliding ring 12741 from rotating circumferentially relative to the rotating sleeve 1271. Thus, when the driving gear 1281 drives the driven gear 1282 to rotate, the driven gear 1282 drives the rotating sleeve 1271 to rotate. When the switching switch 1274 is engaged with the transmission rod 1262 or the second worm gear 1252, the rotating sleeve 1271 can drive the transmission rod 1262 or the second worm gear 1252 to rotate, thereby transmitting the rotational force of the power source to the transmission rod 1262 or the second worm gear 1252. The switching switch 1274 also includes a waveplate ring 12743 sleeved on the sliding ring 12741. The sliding ring 12741 has an inwardly recessed annular groove 12754, and the waveplate ring 12743 is fixed in the annular groove 12754. This arrangement allows the waveplate ring 12743 and the sliding ring 12741 to rotate relative to each other. The outer sleeve 11 is provided with a paving groove 111 that allows the waveplate ring 12743 to protrude (see...). Figure 1 The actuating groove 111 extends along the axial direction of the outer sleeve 11. The waveplate ring 12743 has a first position and a second position within the actuating groove 111. Figure 1 (as shown in the diagram) In the first position, the third protrusion 12742 abuts against the first protrusion 1272, and in the second position, the third protrusion 12742 abuts against the second protrusion 1273.

[0058] The transmission principle by which the closing rod assembly 12 transmits driving force to the movable tube 122 to change the anvil assembly 40 from a folded structure to an unfolded structure is as follows:

[0059] The waveplate ring 12743 is in the first position (initial position), and the third protrusion 12742 abuts against the first protrusion 1272. At this time, the motor rotates forward, and the driving gear 1281 drives the driven gear 1282 to rotate under the drive of rotational force, causing the rotating sleeve 1271 to rotate. Since the third protrusion 12742 abuts against the first protrusion 1272, the rotating sleeve 1271 will drive the transmission rod 1262 to rotate. Under the transmission of the linear gear 1263, the lead screw 126... 1. The linear motion is upward. Since the lead screw 1261 is connected to the movable tube 122, the lead screw 1261 will push the movable tube 122 to move upward (i.e., move towards the anvil assembly 40). Then, the protruding part 1241 moves upward in the slot 1211. The folding part 42 is folded upward to open under the action of the traction rod 123. When the folding part 42 is opened, the irregular insertion part 1222 of the movable tube 122 is also inserted into the irregular insertion slot 46.

[0060] Under the action of external force, the waveplate ring 12743 is moved from the first position to the second position, and the third protrusion 12742 abuts against the second protrusion 1273. At this time, the driving gear 1281 drives the driven gear 1282 to rotate under the drive of rotational force, which causes the rotating sleeve 1271 to rotate. Since the third protrusion 12742 abuts against the second protrusion 1273, the rotating sleeve 1271 will drive the second worm gear 1252 to rotate. Under the transmission of the worm gear 1253, the first worm gear 1251 rotates. A square through-hole and a square rod are used to connect the first worm gear 1251 and the movable tube 122, thus providing circumferential positioning. The first worm gear 1251 drives the movable tube 122 to rotate. Then, as described above, the movable tube 122 drives the gear ring structure 44 to rotate, which in turn drives the micro gear 45 to rotate. Subsequently, the engagement between the micro gear 45 and the rack causes the displacement part 43 to move radially outward, thereby transforming the anvil assembly into an unfolded structure.

[0061] The transmission principle by which the closing rod assembly 12 transmits driving force to the movable tube 122 to close the anvil assembly 40 is as follows:

[0062] When the anvil assembly is in the unfolded configuration, the waveplate ring 12743 is moved from the second position to the first position under the action of external force, and the third protrusion 12742 abuts against the first protrusion 1272. At this time, the motor reverses, and the driving gear 1281 drives the driven gear 1282 to rotate in the opposite direction under the drive of rotational force, which causes the rotating sleeve 1271 to rotate in the opposite direction. Since the third protrusion 12742 abuts against the first protrusion 1272, the rotating sleeve 1271 will drive the transmission rod 1262 to rotate in the opposite direction. Under the transmission of the linear gear 1263, the lead screw 1261 moves linearly downward. Since the lead screw 1261 is connected to the movable tube 122, the lead screw 1261 will pull the movable tube 122 downward, thereby closing the anvil assembly.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An integrated tubular stapler, characterized in that, include: The grip assembly includes a grip housing, a power source disposed within the grip housing, and a control component for controlling the operation of the power source; The shaft assembly includes an outer tube with one end fixed to the grip housing, a closing rod assembly disposed within the outer tube, and a firing rod assembly; The staple cartridge assembly includes a cylindrical shell mounted on the other end of the outer sleeve, an annular cartridge disposed within the cylindrical shell, a staple disposed within the annular cartridge, a staple pusher located below the staple, and an annular cutter disposed inside the annular cartridge. and An anvil assembly has an unfolded configuration and a folded configuration. The anvil assembly has a plurality of nail pits formed on it. In the unfolded configuration, all nail pits face the stitching surface of the annular cartridge. A closing rod assembly passes through the cartridge assembly and connects to the anvil assembly. The closing rod assembly drives the anvil assembly to switch between the unfolded and folded configurations. The anvil assembly is always connected to the closing rod assembly when it is in the unfolded configuration, the folded configuration, and when switching between the unfolded and folded configurations. The anvil assembly includes a base and a plurality of folded portions pivotally connected to the base, wherein the folded portions have the nail pits formed thereon, and the closing rod assembly drives the folded portions to fold relative to the base; The closing rod assembly includes a fixed tube body, a movable tube body sleeved with the fixed tube body, and a traction rod with both ends hinged to the movable tube body and the folding part, respectively. The base is fixed on the fixed tube body, and the movable tube body can move along the axial direction of the fixed tube body within the fixed tube body. The anvil assembly also includes a displacement portion that can move relative to the base, and the displacement portion has the nail pit formed thereon. In the unfolded configuration, the displacement portion and the folding portion are arranged at intervals along the circumference. The movable tube body is rotatable relative to the fixed tube body. A toothed ring structure is provided on the base. A first circumferential limiting structure is provided 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 has a rack part extending radially along the base. A micro gear for transmission is provided between the rack part and the toothed ring structure. The shaft of the micro gear is fixed on the base.

2. The integrated tubular stapler as described in claim 1, characterized in that, The fixed tube is sleeved on the outside of the movable tube. The fixed tube has several slots extending along the axial direction. The movable tube is fitted with a collar, which can rotate relative to the movable tube. The movable tube is hinged to the traction rod through the collar. The collar has a protruding portion for hinged connection with the traction rod, the protruding portion passing through the slot; or, the traction rod passes through the slot to hinge with the collar.

3. The integrated tubular stapler as described in claim 2, characterized in that, An axial positioning structure is provided between the fixed tube and the movable tube. When the anvil assembly is in the unfolded configuration, the movable tube drives the fixed tube to move toward the suture surface through the axial positioning structure.

4. The integrated tubular stapler as described in claim 3, characterized in that, At least two pressing blocks are formed on the movable tube body, and a supporting block corresponding to the pressing blocks is formed in the fixed tube body; in the circumferential direction, a first moving gap is provided between two adjacent pressing blocks for the supporting block to move, and a second moving gap is provided between two adjacent supporting blocks for the pressing blocks to move; when the anvil assembly is in the unfolded structure, the pressing block is located above the supporting block and abuts against the supporting block.

5. The integrated tubular stapler as described in claim 4, characterized in that, The closing rod assembly includes a transmission wheel set for transmitting the rotational force of the power source, a first transmission unit for transmitting the rotational force of the transmission wheel set to the movable tube, a second transmission unit for converting the rotational force of the transmission wheel set into linear motion and transmitting it to the movable tube, and a conversion unit for switching between the first transmission unit and the second transmission unit, wherein the conversion unit is used to transmit the rotational force of the transmission wheel set to the first transmission unit or the second transmission unit.

6. The integrated tubular stapler as described in claim 5, characterized in that, The first transmission unit includes a first worm and a second worm arranged in parallel, and a turbine disposed between the first worm and the second worm, wherein one end of the movable tube away from the anvil assembly is fixed to the worm; The second transmission unit includes a lead screw and a transmission rod arranged in parallel, a linear gear threaded onto the lead screw, and a rotary gear mounted on the transmission rod. One end of the lead screw is connected to the movable tube body through an axial limiting structure, and the other end is connected to the gripping housing or outer sleeve through a second circumferential limiting structure. The conversion unit is disposed between the second worm and the transmission rod, and is selectively connected to one of the second worm and the transmission rod by external force to transmit the rotational force to the second worm or the transmission rod.

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