A staple cartridge assembly in a laparoscopic stapler with an independent limiting track

Abstract

The present invention discloses a staple cartridge assembly of a laparoscopic stapler with an independent limiting track, which relates to the technical field of accessories for laparoscopic staplers. It aims at the problem that the connection between the staple cartridge and the stapler becomes loose, resulting in the failure of correct release or fixation of the staples and directly leading to the failure of suturing. The present invention can not only utilize the locking structure with lateral and longitudinal limits to achieve double-locking installation between the staple cartridge and the stapler, and realize the smooth suturing of the staples during the in-operation of the laparoscopic stapler, but also achieve the purpose of continuous and smooth installation by combining the lateral and longitudinal limits carried out simultaneously with the continuous longitudinal and lateral buckling, reducing the preoperative preparation time. The mutual cooperation of the two uses double independent "limiting tracks" to achieve two-way closing and locking of the staple cartridge, effectively avoiding the problem that the connection between the staple cartridge and the stapler becomes loose, resulting in the failure of correct release or fixation of the staples.

Description

Technical Field

[0001] The present invention relates to the technical field of accessories for endoscopic staplers, and particularly relates to a cartridge assembly in an endoscopic stapler with an independent limiting track. Background Art

[0002] The cartridge is one of the core parts of stapler surgical instruments. Its main function is to store and release staples. When the instrument works, as the pusher slider is pushed forward, it drives the pusher plate to move in the cartridge holes. The pusher plate pushes the titanium staples to the anvil, and the titanium staples are pressed and closed to achieve the tissue suturing effect. It includes structures such as a cartridge housing, arranged staples, a staple pushing mechanism, and a locking mechanism.

[0003] Referring to a cartridge assembly of an endoscopic stapler disclosed in Patent Application No. 202110331284.2, in view of the situation that the existing endoscopic stapler cartridge is difficult to wrap the staples, resulting in the staples being prone to loosening, tilting or even falling off, it supports the legs of the sewing staples through the guide groove to prevent the sewing staples from tilting and getting stuck and failing during transportation and suturing. However, in the actual application process, there is still a problem that the connection between the cartridge and the stapler becomes loose, and the incorrect release or fixation of the staples due to the loosening of the cartridge directly leads to the failure of suturing.

[0004] Therefore, the present application proposes a solution. Summary of the Invention

[0005] The purpose of the present invention is to provide a cartridge assembly in an endoscopic stapler with an independent limiting track, which can not only use the locking structure of horizontal limiting and vertical limiting to achieve double-locking installation between the cartridge and the stapler, so as to smoothly suture the staples during the in-operation of the endoscopic stapler; but also through the combination of horizontal limiting and vertical limiting carried out synchronously and the continuous longitudinal buckling and horizontal buckling, achieve the purpose of continuous and smooth installation and reduce the preoperative preparation time; the mutual use of the two, with double independent "limiting tracks" to achieve the two-way closing and locking of the cartridge, effectively avoiding the problem that the staples cannot be correctly released or fixed due to the loosening of the connection between the cartridge and the stapler.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A cartridge assembly in an endoscopic stapler with an independent limiting track, including a cartridge body arranged on a cartridge seat, the cartridge body is slidably and snap-fitted with the cartridge seat, both sides of the cartridge body corresponding to the rear end of the cartridge seat are provided with smoothly connected arc-shaped guide grooves and longitudinal buckling grooves, and the cartridge seat is provided with a longitudinal limiting component for longitudinally locking the cartridge body through the arc-shaped guide grooves; the longitudinal limiting component includes a guide card seat, a longitudinal pin and a folded spring piece, and the longitudinal pin is arranged at the front end of the folded spring piece and is matched with the longitudinal buckling groove.

[0007] The cartridge body is provided with transverse buckle grooves on both sides corresponding to the front end of the cartridge seat. The cartridge body is provided with a transverse limiting component for transverse locking of the cartridge body through the transverse buckle grooves. The transverse limiting component includes fixing blocks connected to the upper surfaces of both sides of the cartridge seat. A hook-shaped elastic piece facing the rear is installed on the fixing block, and the rear end of the hook-shaped elastic piece is connected with a transverse latch matching the transverse buckle groove.

[0008] It is further set that: the guiding clamping seat is connected to the upper end of the cartridge seat. An arc-shaped guiding bar clamped with the arc-shaped guiding groove is installed inside the guiding clamping seat. The extending front end of the folded elastic piece passing through the guiding clamping seat is connected with the longitudinal latch. A supporting block is jointly installed between the folded elastic piece and the guiding clamping seat.

[0009] It is further set that: the extending rear end of the folded elastic piece passing through the guiding clamping seat is connected with a thrust plate, and a second inclined guiding groove is opened on the inner side of the front end of the thrust plate.

[0010] It is further set that: the cartridge body is provided with a pressing component for the offset of the longitudinal latch corresponding to the extending rear end of the folded elastic piece passing through the guiding clamping seat. The pressing component includes a long push rod and a short push rod rotatably arranged in the triangular grooves on both sides of the cartridge body. The long push rod and the short push rod are in a folded angle shape, and the inner sides of the long push rod and the short push rod are aligned with the side of the triangular groove.

[0011] It is further set that: a spring is embedded and installed on the outer side of the cartridge body corresponding to the thrust plate. The outer end of the spring is connected with the inner side of the long push rod. When the spring extends, the outer end of the long push rod abuts against the second inclined guiding groove.

[0012] It is further set that: a first inclined guiding groove is opened on the front end of the upper surface of the transverse latch. A smooth straight moving groove is opened on the lower side of the cartridge body corresponding to the transverse buckle groove.

[0013] It is further set that: glue grooves and locking grooves are successively opened on both sides of the front end of the cartridge body close to the straight moving groove. A glue block is installed on the upper side of the cartridge seat corresponding to the glue groove. Both the glue groove and the glue block are diamond-shaped blocks. A locking buckle is installed on the upper side of the cartridge seat corresponding to the locking groove.

[0014] It is further set that: a middle base, an outer base and an inner base are symmetrically installed on the inner bottom end of the cartridge seat from inside to outside in sequence. A sliding knife groove is jointly opened between the middle parts of the cartridge seat and the cartridge body. Two groups of symmetrically distributed nail grooves communicated with the sliding knife groove are opened on the cartridge body.

[0015] The present invention also proposes an installation method for a cartridge assembly in a laparoscopic stapler with an independent limiting track, including the following steps:

[0016] Step 1: Insert at an angle: insert the nail magazine body with the sealing film from the end into the middle and rear section of the nail magazine seat, and push it inward at an angle;

[0017] Step 2: Horizontal insertion: After the arc-shaped guide bar enters the arc-shaped guide groove, the nail magazine body continues to be pushed in horizontally;

[0018] Step 3: Fasten: Install until the horizontal latch and the horizontal slot, and the vertical latch and the vertical slot are double-fastened.

[0019] The present invention has the following beneficial effects:

[0020] 1. The present invention aims to solve the problem that the staples cannot be correctly released or fixed due to the loose connection between the stapler and the stapler, which directly leads to suturing failure. The present invention can not only realize the double locking installation between the stapler and the stapler by using the locking structure of the transverse limit and the longitudinal limit, so as to realize the smooth suturing of the staples during the intraoperative operation of the laparoscopic stapler, but also realize the purpose of continuous and smooth installation by combining the synchronous transverse limit and the longitudinal limit with the continuous longitudinal buckle and the transverse buckle, so as to reduce the preoperative preparation time. The two can be used in conjunction with each other to realize the bidirectional closed locking of the stapler with the dual independent "limiting tracks", so as to effectively avoid the problem that the staples cannot be correctly released or fixed due to the loose connection between the stapler and the stapler.

[0021] 2. During the two-way locking process, the longitudinally sliding arc-shaped guide strip completes the horizontal guidance of the nail magazine body along the arc-shaped guide groove. During the horizontal sliding process of the nail magazine body, the long push rod on the pushing assembly deflects outward during the resetting and expansion process of the spring, and then deflects and squeezes on the thrust plate. The thrust plate can also complete the inward displacement of the other end through the support block through the folding spring piece, that is, drive the longitudinal bayonet to engage in the longitudinal buckle groove, thereby completing the longitudinal locking of the nail magazine body; then continue to push the nail magazine body, when the transverse bayonet on the transverse limiting assembly is vertically aligned with the transverse buckle groove, the hook-shaped spring piece on the transverse bayonet pops up upward when it is separated from the limiting and pressing state of the nail magazine body, that is, drives the transverse bayonet to engage in the transverse buckle groove, so that the nail magazine assembly and the nail magazine seat form a stable transverse locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of a stapler cartridge assembly in a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0024] Figure 2 Overall schematic diagram of the cartridge holder of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0025] Figure 3 Cross-sectional view of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention, taking the middle position of the longitudinal limiting component as the cutting plane;

[0026] Figure 4 Top-down sectional schematic diagram of the longitudinal limiting component of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0027] Figure 5 Exploded schematic diagram of the installation structure of the longitudinal limiting component of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0028] Figure 6 Structural diagram of the pushing component of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0029] Figure 7 Partial structural sectional view of the cartridge body of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0030] Figure 8 Longitudinal exploded schematic diagram of the cartridge assembly and the cartridge holder of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0031] Figure 9 Transverse exploded schematic diagram of the cartridge assembly and the cartridge holder of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0032] Figure 10 Structural diagram of the transverse limiting component of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention;

[0033] Figure 11 Schematic diagram of the installation process of the cartridge assembly of a laparoscopic stapler with an independent limiting track proposed by the present invention.

[0034] In the figure: 1. Staple cartridge seat; 2. Staple cartridge body; 3. Guide clamping seat; 4. Lateral limiting assembly; 41. Fixed block; 42. Hook-shaped elastic piece; 43. Lateral pin; 44. First inclined guide groove; 5. Blade slide groove; 6. Rubber block; 7. Locking buckle; 8. Outer base; 9. Inner base; 10. Middle base; 11. Lateral buckling groove; 12. Staple groove; 13. Longitudinal pin; 14. Folded elastic piece; 15. Support block; 16. Thrust plate; 17. Arc-shaped guide bar; 18. Arc-shaped guide groove; 19. Longitudinal buckling groove; 20. Pushing assembly; 201. Long push rod; 202. Short push rod; 21. Spring; 22. Second inclined guide groove; 23. Rubber groove; 24. Linear movement groove; 25. Locking groove. Specific implementation manner

[0035] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1: Aiming at the problem that the failure of correct release or fixation of the staple due to the loosening of the connection between the staple cartridge and the stapler directly leads to the failure of suturing, the following technical solutions are proposed:

[0037] Refer to Figure 1 - Figure 10 As shown in the figure, in this embodiment, a staple cartridge assembly in a laparoscopic stapler with an independent limiting track includes a staple cartridge body 2 provided on a staple cartridge seat 1. The staple cartridge body 2 is slidably and snap-fitted with the staple cartridge seat 1. Smoothly connected arc-shaped guide grooves 18 and longitudinal buckling grooves 19 are respectively provided on both sides of the rear end of the staple cartridge body 2 corresponding to the staple cartridge seat 1. The staple cartridge seat 1 is provided with a longitudinal limiting assembly for longitudinally locking the staple cartridge body 2 through the arc-shaped guide grooves 18.

[0038] The longitudinal limiting assembly includes a guide clamping seat 3, a longitudinal pin 13 and a folded elastic piece 14. The longitudinal pin 13 is arranged at the front end of the folded elastic piece 14 and is matched with the longitudinal buckling groove 19. The inner bottom end of the staple cartridge seat 1 is symmetrically installed with a middle base 10, an outer base 8 and an inner base 9 in sequence from inside to outside. The cooperation installation of the blade is jointly formed among the middle base 10, the outer base 8 and the inner base 9 in combination with the staple cartridge seat 1 and between the staple cartridge body 2. And after the cooperation between the staple cartridge body 2 and the staple cartridge seat 1, a stable installation is formed to realize the stable staple output of the staple cartridge body 2.

[0039] A knife groove 5 is provided between the staple cartridge seat 1 and the middle of the staple cartridge body 2. Two sets of symmetrically distributed nail grooves 12 connected to the knife groove 5 are provided on the staple cartridge body 2. The staple cartridge body 2 and the staple cartridge seat 1 are connected to the stapler through mechanical transmission, and a nail stop seat is hingedly connected to the upper end corresponding to the staple cartridge seat 1. The staples to be sutured are loaded into the nail groove 12 in the staple cartridge body 2, and the knife pusher mechanism and the knife blade are arranged in the knife groove 5 to complete the suturing action of the staples. This is a conventional arrangement of those skilled in the art in the prior art and will not be described in detail here.

[0040] The nail magazine body 2 is provided with transverse buckle grooves 11 on both sides of the front end of the nail magazine seat 1. The nail magazine body 2 is provided with a transverse limit assembly 4 for transversely locking the nail magazine body 2 through the transverse buckle grooves 11. The transverse limit assembly 4 includes a fixing block 41 connected to the upper surface positions on both sides of the nail magazine seat 1. A hook-shaped spring piece 42 facing the rear side is installed on the fixing block 41. The rear end of the hook-shaped spring piece 42 is connected to a transverse latch 43 matching the transverse buckle groove 11.

[0041] The guide card seat 3 is connected to the upper end of the nail magazine seat 1, and an arc-shaped guide strip 17 that is engaged with the arc-shaped guide groove 18 is installed on the inner side of the guide card seat 3. The folding spring piece 14 passes through the extended front end of the guide card seat 3 and is connected to the longitudinal bayonet 13. A support block 15 is installed between the folding spring piece 14 and the guide card seat 3. The extended rear end of the folding spring piece 14 passing through the guide card seat 3 is connected to the thrust plate 16. The inner side of the front end of the thrust plate 16 is provided with a second guide inclined groove 22. The nail magazine body 2 is installed with a pushing component 20 for offsetting the longitudinal bayonet 13 corresponding to the extended rear end of the folding spring piece 14 passing through the guide card seat 3;

[0042] The pushing assembly 20 includes a long push rod 201 and a short push rod 202 which are rotatably arranged in the triangular grooves on both sides of the nail magazine body 2, wherein the pushing assembly 20 is hingedly arranged at the inner corners of the triangular grooves, one side of which can be aligned with the inner side of the long push rod 201, and the other side is aligned with the inner side of the short push rod 202, so that when the nail magazine body 2 moves horizontally, when the short push rod 202 abuts against the other inner side, the long push rod 201 deflects to the maximum angle and completes the pushing of the thrust plate 16, thereby forming the deflection of the folding spring sheet 14, and finally the folding spring sheet 14 drives the longitudinal latch 13 to engage with the longitudinal buckle groove 19 to complete the longitudinal buckle;

[0043] Basic principle: Figure 5 , Figure 9 and Figure 10 To illustrate, when installing the staple cartridge body 2 of the laparoscopic stapler, the longitudinal limit assembly is combined with the transverse limit assembly 4 to complete the locking and fixing of the staple cartridge body 2, as follows:

[0044] The arc-shaped guide strip 17 that slides longitudinally is used to guide the nail magazine body 2 horizontally along the arc-shaped guide groove 18. During the horizontal sliding process of the nail magazine body 2, the long push rod 201 on the pushing assembly 20 is deflected outwardly during the reset and expansion process of the spring 21, and then deflected and pressed on the thrust plate 16. The thrust plate 16 can also complete the inward deviation of the other end through the support block 15 through the folding spring sheet 14, that is, drive the longitudinal bayonet 13 to buckle in the longitudinal buckle groove 19, thereby completing the longitudinal locking of the nail magazine body 2;

[0045] Then continue to push the staple cartridge body 2, and when the transverse latch 43 on the transverse limiting assembly 4 is vertically aligned with the transverse buckle groove 11, the hook-shaped spring piece 42 on the transverse latch 43 will bounce upwards when it is released from the limiting and pressing state of the staple cartridge body 2, thus driving the transverse latch 43 to buckle with the transverse buckle groove 11, so that the staple cartridge assembly 2 and the staple cartridge seat 1 form a stable transverse locking; under the double locking, when performing intraoperative operation of the laparoscopic stapler, the problem of the staples not being able to be correctly released or fixed due to the loose connection between the staple cartridge and the stapler is avoided;

[0046] It should be noted here that: during the lateral limiting process, the nail magazine body 2 moves, and the rubber block 6 on the nail magazine seat 1 gradually cooperates and buckles with the rubber groove 23, and at the synchronous time of buckling, the locking buckle 7 on the nail magazine seat 1 also buckles with the locking groove 25, that is, in the process of synchronous lateral and longitudinal limiting of the nail magazine body 2 and the nail magazine seat 1, the setting of the locking structure is also assisted, which can effectively improve the stability of the use of the nail magazine;

[0047] For this purpose, additional features are provided: a guide groove 44 is provided at the front end of the upper surface of the transverse latch 43, a smooth straight displacement groove 24 is provided at the lower side of the nail magazine body 2 corresponding to the transverse buckle groove 11, a glue groove 23 and a locking groove 25 are provided on both sides of the front end of the nail magazine body 2 close to the straight displacement groove 24, a glue block 6 is installed at the upper side of the nail magazine seat 1 corresponding to the glue groove 23, and both the glue groove 23 and the glue block 6 are diamond-shaped blocks, and a locking buckle 7 is installed at the upper side of the nail magazine seat 1 corresponding to the locking groove 25;

[0048] When the nail magazine body 2 completes the pressing of the transverse latch 43 through the guide groove 44 and the transverse latch 43 is vertically aligned with the linear groove 24, the transverse latch 43 releases its elastic potential energy and bounces upward and snaps into the transverse snap groove 11 along the linear groove 24 to form an auxiliary locking structure.

[0049] Embodiment 2: This embodiment further optimizes the structure of the longitudinal limit assembly in Embodiment 1:

[0050] The long push rod 201 and the short push rod 202 are in an angled shape, and the inner sides of the long push rod 201 and the short push rod 202 are aligned with the sides of the triangular groove. A spring 21 is embedded and installed on the outer side of the thrust plate 16 of the nail magazine body 2. The outer end of the spring 21 is connected to the inner side of the long push rod 201, and when the spring 21 is extended, the outer end of the long push rod 201 abuts against the second guide groove 22.

[0051] Structural advantages: Figure 5 and Figure 6 It should be noted that: during the horizontal movement of the staple cartridge body 2, the arc-shaped guide bar 17 and the arc-shaped guide groove 18 cooperate with each other to complete the horizontal movement. When the staple cartridge body 2 drives the pushing assembly 20 to move to the thrust plate 16, the long push rod 201 is driven to squeeze out of the thrust plate 16 under the elastic action of the spring 21, further driving the folding spring sheet 14 to complete the deflection, and finally driving the longitudinal latch 13 to buckle in the longitudinal buckle groove 19;

[0052] It is necessary to add that: refer to Figure 9 As shown, during the horizontal movement of the nail magazine body 2, both sides of the rear ends of the nail magazine body 2 and the nail magazine seat 1 are structures of the same shape as the arc-shaped guide strip 17. Even if the long push rod 201 is always subjected to the elastic expansion effect of the spring 21, it is still limited by the close cooperation between the nail magazine body 2 and the nail magazine seat 1 until the long push rod 201 is separated from the contact with the nail magazine seat 1. At this time, the long push rod 201 directly contacts the second guide groove 22 on the thrust plate 16, and continues to move horizontally. When the long push rod 201 contacts the thrust plate 16 through one side of the second guide groove 22, it drives the folded spring sheet 14 to complete the deflection action, until the longitudinal latch 13 is buckled in the longitudinal buckle groove 19 to complete the longitudinal limiting process;

[0053] It should be noted again that the longitudinal limiting process and the lateral limiting process are completed synchronously, and the process of horizontal movement and tilting movement to insert the nail magazine body 2 is completed continuously, and then the longitudinal snapping and lateral snapping actions in the process of combined installation of the nail magazine body 2 and the nail magazine seat 1 are also completed continuously, further reducing the combined installation time of the nail magazine body 2.

[0054] Example 3: Reference Figure 11 As shown, this embodiment combines the technical contents of Embodiment 1 and Embodiment 2 to form the following installation method:

[0055] Step 1: Tilt insertion: Place the nail magazine body 2 with the sealing film into the middle and rear section of the nail magazine seat 1 from the end first, and push it inward at an angle. At this time, the nail magazine body 2 is kept sliding horizontally at a fixed tilt angle, and the end of the arc-shaped guide groove 18 is always kept horizontally aligned with the arc-shaped guide bar 17;

[0056] Step 2: Horizontal Placement: When the arc guide bar 17 enters the arc guide groove 18, immediately displace the staple cartridge body 2 from an inclined state to a horizontal state. During the gradual displacement process, the arc guide bar 17 gradually coincides with the arc guide groove 18. When approaching the completion of longitudinal limitation, the transverse latch 43 gradually coincides with the transverse buckle groove 11, and the rubber block 6 gradually coincides with the rubber groove 23. Synchronously, the locking block 7 also gradually coincides within the locking groove 25;

[0057] Step 3: Buckling: Continuing to push horizontally, the long push rod 201 deflects outwards during the reset expansion process of the spring 21, and then deflects and presses on the thrust plate 16. The thrust plate 16 can then complete the inward offset of the other end through the folded elastic piece 14 by the support block 15, that is, driving the longitudinal latch 13 to buckle into the longitudinal buckle groove 19; At the same time, the hook-shaped elastic piece 42 on the transverse latch 43 pops up upwards when it is disengaged from the limit pressing of the staple cartridge body 2, that is, driving the transverse latch 43 to buckle with the transverse buckle groove 11; At this time, the double buckling of the transverse latch 43 with the transverse buckle groove 11 and the longitudinal latch 13 with the longitudinal buckle groove 19 completes the installation.

[0058] In summary: Combining Example 1 and Example 2, it can be seen that the double-locking installation between the staple cartridge and the stapler can be realized by using the locking structure with transverse limitation and longitudinal limitation, so as to smoothly suture the staple during the in-vivo operation of the endoscopic stapler; and the continuous and smooth installation purpose can be achieved through the combination of transverse limitation and longitudinal limitation carried out synchronously and the continuous longitudinal buckling and transverse buckling, reducing the preoperative preparation time; the mutual matching use of the two realizes the bidirectional closing and locking of the staple cartridge with two independent "limiting tracks", effectively avoiding the problem that the staples cannot be correctly released or fixed due to the loosening of the connection between the staple cartridge and the stapler.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

[0060] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described.

Claims

1. A cartridge assembly of a laparoscopic stapler with an independent limiting track, comprising a cartridge body (2) disposed on a cartridge seat (1), characterized in that, The cartridge body (2) is slidably and snap-fitted to the cartridge seat (1). On both sides of the cartridge body (2) corresponding to the rear end of the cartridge seat (1), there are arc-shaped guide grooves (18) and longitudinal locking grooves (19) that are smoothly connected. The cartridge seat (1) is provided with a longitudinal limiting component for longitudinally locking the cartridge body (2) through the arc-shaped guide grooves (18). The longitudinal limiting component includes a guide clamping seat (3), a longitudinal locking pin (13), and a folded elastic piece (14). The longitudinal locking pin (13) is arranged at the front end of the folded elastic piece (14) and is matched with the longitudinal locking groove (19). On both sides of the cartridge body (2) corresponding to the front end of the cartridge seat (1), there are transverse locking grooves (11). The cartridge body (2) is provided with a transverse limiting component (4) for transversely locking the cartridge body (2) through the transverse locking grooves (11). The transverse limiting component (4) includes fixing blocks (41) connected to the upper surfaces of both sides of the cartridge seat (1). A hook-shaped elastic piece (42) facing the rear is installed on the fixing blocks (41). The rear end of the hook-shaped elastic piece (42) is connected with a transverse locking pin (43) that is matched with the transverse locking groove (11). The guide clamping seat (3) is connected to the upper end of the cartridge seat (1). An arc-shaped guide bar (17) that is snap-fitted with the arc-shaped guide groove (18) is installed inside the guide clamping seat (3). The folded elastic piece (14) passes through the extended front end of the guide clamping seat (3) and is connected with the longitudinal locking pin (13). A support block (15) is jointly installed between the folded elastic piece (14) and the guide clamping seat (3). The extended rear end of the folded elastic piece (14) passing through the guide clamping seat (3) is connected with a thrust plate (16). A second inclined guide groove (22) is opened on the inner side of the front end of the thrust plate (16). The cartridge body (2) is provided with a pressing component (20) for the offset of the longitudinal locking pin (13) at the extended rear end of the folded elastic piece (14) passing through the guide clamping seat (3). The pressing component (20) includes a long push rod (201) and a short push rod (202) that are rotatably arranged in the triangular grooves on both sides of the cartridge body (2). The long push rod (201) and the short push rod (202) are in a folded angle shape, and the inner sides of the long push rod (201) and the short push rod (202) are aligned with the side edges of the triangular grooves.

2. The cartridge assembly in the endoscopic stapler with an independent limiting track according to claim 1, wherein, A spring (21) is embedded and installed on the outer side of the cartridge body (2) corresponding to the thrust plate (16). The outer end of the spring (21) is connected with the inner side of the long push rod (201). When the spring (21) extends, the outer end of the long push rod (201) abuts against the second inclined guide groove (22).

3. The cartridge assembly of a laparoscopic stapler with an independent limiting track according to claim 1, wherein, A first inclined guide groove (44) is opened at the front end of the upper surface of the transverse locking pin (43). A smooth straight-moving groove (24) is opened on the lower side of the cartridge body (2) corresponding to the transverse locking groove (11).

4. The cartridge assembly of a laparoscopic stapler with an independent limiting track according to claim 3, wherein, On both sides of the front end of the cartridge body (2) close to the linear movement groove (24), an adhesive groove (23) and a locking groove (25) are sequentially formed. An adhesive block (6) is installed on the upper side of the cartridge seat (1) corresponding to the adhesive groove (23). Both the adhesive groove (23) and the adhesive block (6) are diamond-shaped blocks. A locking buckle (7) is installed on the upper side of the cartridge seat (1) corresponding to the locking groove (25).

5. The cartridge assembly of a laparoscopic stapler with an independent limiting track according to claim 1, characterized in that, On the inner bottom end of the cartridge seat (1), a middle base (10), an outer base (8), and an inner base (9) are symmetrically installed in sequence from the inside to the outside. A sliding knife groove (5) is formed jointly between the middle parts of the cartridge seat (1) and the cartridge body (2). Two groups of symmetrically distributed nail grooves (12) communicating with the sliding knife groove (5) are formed on the cartridge body (2).

6. A method for installing a staple cartridge assembly in a laparoscopic stapler with an independent limiting track, using a staple cartridge assembly in a laparoscopic stapler with an independent limiting track as described in any one of claims 1-5, characterized in that, It includes the following steps: Step 1: Inclined insertion: The cartridge body (2) with a sealing film is inserted into the rear section of the cartridge seat (1) from the end and pushed inwards obliquely. Step 2: Horizontal insertion: When the arc-shaped guide bar (17) enters the arc-shaped guide groove (18), the cartridge body (2) is continuously pushed horizontally. Step 3: Buckling: Until the transverse pin (43) and the transverse buckle groove (11), and the longitudinal pin (13) and the longitudinal buckle groove (19) are buckled doubly to complete the installation.

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