CN220141727U - Nail bin assembly and surgical instrument - Google Patents

Abstract

The utility model discloses a nail bin assembly and a surgical instrument, wherein the nail bin assembly comprises: the nail bin main body comprises a nail outlet surface, a nail bin side wall, an inner side wall and a middle side wall; the nail pushing plate is formed with a plurality of nail pushing plates and comprises a first nail pushing plate arranged in a first row of nail cavities; the first nail pushing plate comprises a first nail pushing plate body and a matching part, the first nail pushing plate body is positioned in one nail cavity of the first row of nail cavities to support the anastomat, and the matching part is positioned outside the nail cavity; the inner side wall is provided with a plurality of guide grooves which are used for being matched with the matching parts; when the first nail pushing piece is positioned at the initial position, the matching part is higher than the guide groove; the guide groove is provided with a first guide portion and/or the mating portion is provided with a second guide portion, the first/second guide portion guiding the mating portion into the guide groove. The cooperation part can smoothly enter the guide groove, so that the first nail pushing piece is prevented from being clamped in the process of triggering the anastomat, the guide is provided for the movement of the first nail pushing piece, and the stability of the movement of the first nail pushing piece and the stability of the triggering of the anastomat are improved.

Description

Nail bin assembly and surgical instrument

Technical Field

The utility model relates to the technical field of surgical instruments, in particular to a nail bin assembly and a surgical instrument.

Background

Surgical cutting staplers are a commonly used instrument in medicine to replace manual suturing, and the main working principle is to use a cutting knife to separate tissues and use titanium nails to anastomose the tissues, similar to a stapler. A variety of staplers are classified according to the suitability for different body parts, and for surgical incision staplers, the working principle is to enter the patient's body through the cannula of the puncture outfit positioned precisely at the surgical site, then make a longitudinal incision in the tissue and apply staples on opposite sides of the incision, thereby performing dissection and anastomosis of the tissue.

The nail bin assembly is used for discharging nails and is matched with the nail supporting seat to perform incision suturing, when the nail bin assembly is not installed in the surgical instrument or the installed nail bin is used, when the surgical instrument works, human tissues are only cut and cannot be sutured, bleeding is caused, the human body is damaged, and the operation is influenced. Therefore, the surgical instrument is provided with an empty nail bin protection structure, the limiting part is arranged through the cutting knife, the limiting mechanism is arranged on the nail bin seat, and when the nail bin is not installed in the nail bin seat or the nail bin which is already fired is installed in the nail bin seat, the limiting mechanism and the limiting part are matched to limit the cutting knife to move, so that the surgical instrument cannot run.

The cutting knife moves in the feed slot of the nail bin assembly, the nail bin assembly is divided into two parts by the feed slot, each part comprises a nail outlet surface, an inner side wall, a middle side wall and a nail bin side wall, a nail bin main body of the nail bin assembly is provided with a nail cavity, and a nail pushing sheet is arranged in the nail cavity and is bonded and limited with one side wall. Due to the arrangement of the limiting part, when the cutting knife moves in the nail bin assembly, the limiting part can interfere with the inner side wall of the nail bin assembly, so that the inner side wall needs to be reduced in height to avoid the limiting part, and the nail pushing sheet is higher than the inner side wall and separated from the inner side wall. However, the position stability of the nail pushing plate separated from the inner side wall is poor, and when the nail pushing plate is pushed to move along the depth direction of the nail cavity, the nail pushing plate is easily propped against the inner side wall, so that the condition that the firing cannot be performed occurs.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a nail bin assembly and a surgical instrument, solves the problem that a nail pushing sheet is easy to be blocked during firing, and improves the stability of firing.

The utility model is realized by the following technical scheme:

the nail bin comprises a nail bin main body, wherein a feed groove is formed in the nail bin main body, the feed groove divides the nail bin main body into a first part and a second part, and the first part and the second part comprise a nail outlet surface, a nail bin side wall, an inner side wall and a middle side wall; the middle side wall is arranged between the inner side wall and the side wall of the nail bin, and the feeding groove is formed by surrounding the inner side wall of the first part and the inner side wall of the second part; the first part and the second part are respectively provided with at least two rows of pin cavities, namely a first row of pin cavities and a second row of pin cavities, and openings of the pin cavities of the first row of pin cavities and the second row of pin cavities are positioned on the pin outlet surface;

The staples are respectively arranged in the staple cavities;

the nail pushing plate comprises a first nail pushing plate arranged in the first row of nail cavities and a second nail pushing plate arranged in the second row of nail cavities; the first nail pushing plate comprises a first nail pushing plate body and a matching part, the first nail pushing plate body is positioned in one nail cavity of the first row of nail cavities to support the anastomat, the matching part is positioned outside the nail cavity, and the nail pushing plate is pushed to displace along the depth direction of the nail cavity so as to fire the anastomat;

the inner side wall is provided with a plurality of guide grooves, and each guide groove corresponds to each nail cavity of the first row of nail cavities one by one; the guide groove is matched with the matching part to guide the nail pushing piece to displace along the depth direction of the nail cavity;

when the first nail pushing piece is positioned at the initial position, the height of the inner side wall relative to the nail outlet surface is lower than the height of the matching part relative to the nail outlet surface, so that the matching part is higher than the guide groove and separated from the guide groove; the guide groove is provided with a first guide part and/or the matching part is provided with a second guide part, and the first guide part or the second guide part guides the matching part to enter the guide groove, or the first guide part and the second guide part are matched to guide the matching part to enter the guide groove.

Further, the first guide portion and/or the second guide portion is a guide slope.

Further, when the first guide portion is engaged with the second guide portion, the first guide portion mostly engages with or fully engages with the second guide portion.

Further, the inner side wall and the middle side wall enclose a first advancing groove, each nail cavity in the first row of nail cavities is communicated with the first advancing groove, and each guide groove is communicated with the first advancing groove; the first nail pushing plate further comprises a firing part, the firing part is connected to the first nail pushing plate body and is arranged corresponding to the first travelling groove, and the firing part is pushed by the nail pusher of the nail bin assembly along the depth direction of the first travelling groove so as to enable the first nail pushing plate to displace along the depth direction of the nail cavity;

the matching part is arranged on the firing part and protrudes towards the direction of the inner side wall, and the firing part is arranged between the matching part and the first nail pushing sheet. Further, the firing part is provided with an auxiliary guide part, and the auxiliary guide part is connected with the second guide part.

Further, the inner side wall and the middle side wall enclose a first advancing groove, the first part and/or the second part is/are provided with a third row of pin cavities, the third row of pin cavities are positioned between the first row of pin cavities and the second row of pin cavities, and each pin cavity in the first row of pin cavities is arranged on the inner side wall and is communicated with the first advancing groove; each guide groove is communicated with each nail cavity of the first row of nail cavities;

The first nail pushing plate further comprises a firing part and a third nail pushing plate body, the third nail pushing plate body corresponds to one of the third nail cavities, and the firing part is connected between the first nail pushing plate body and the third nail pushing plate body; the third nail pushing plate body part is positioned in the corresponding nail cavity to support the anastomat, and the matching part is arranged on one side of the first nail pushing plate body, which faces the guide groove.

Further, the second nail pushing piece is provided with a first convex part, the side wall of the nail bin is provided with a first concave part, and the first concave part is matched with the first convex part to guide the nail pushing piece to slide along the depth direction of the nail cavity.

Further, the nail chamber includes nail chamber body and with the spacing groove of nail chamber body intercommunication, the spacing groove is formed with two, locates respectively the both sides of nail chamber body, two nail legs of anastomotic nail are acceptd respectively in two in the spacing groove.

Further, the staple pusher of the staple cartridge assembly is pushed by the cutter assembly to move in the longitudinal direction; the cutter assembly comprises a limiting part which responds to the movement of the cutter assembly, the limiting part moves in the longitudinal direction in an area surrounded by the middle side wall of the first part and the middle side wall of the second part, and when the limiting part moves, the height of the limiting part relative to the nail discharging surface is higher than that of the inner side wall relative to the nail discharging surface, so that the height of the inner side wall relative to the nail discharging surface is lower than that of the matching part relative to the nail discharging surface.

Further, the first guide portion and/or the second guide portion is a guide cambered surface.

The utility model also provides a surgical instrument comprising a handle, a shaft assembly and a jaw assembly, the jaw assembly comprising a cartridge seat, the surgical instrument further comprising a cartridge assembly as described above, the cartridge assembly being removably mounted to the cartridge seat.

Compared with the prior art, the utility model has the beneficial effects that: through the setting of first guiding part and/or second guiding part, the cooperation portion can get into the guiding groove smoothly, avoids first ejector pin piece to be blocked at the in-process of percussion anastomat, and provides the direction for the removal of first ejector pin piece, has promoted the stability of first ejector pin piece motion and the stability that the anastomat was fired.

Drawings

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

FIG. 2 is a schematic view of the structure of a staple cartridge assembly of a first embodiment of the present utility model;

FIG. 3a is an exploded view of a jaw assembly of a first embodiment of the utility model;

FIG. 3b is a schematic view of the internal structure of a surgical instrument according to a first embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a cutter assembly according to a first embodiment of the present utility model;

FIG. 5 is an exploded view of a staple cartridge assembly of a first embodiment of the present utility model;

FIG. 6 is a schematic view of the staple cartridge holder of the first embodiment of the present utility model in semi-section;

FIG. 7 is a schematic view of the cutter assembly of the first embodiment of the present utility model in a safety position;

FIG. 8 is a schematic view of the structure at A in FIG. 7;

FIG. 9 is a schematic view of a first embodiment of the present utility model showing the cutter assembly in a first position;

FIG. 10 is a schematic view of the structure at B in FIG. 9;

fig. 11 is a schematic structural view of the staple pusher of the first embodiment of the present utility model;

FIG. 12 is a cross-sectional view of the staple pusher of the first embodiment of the present utility model;

FIG. 13 is a schematic view of the structure of a staple cartridge assembly of the first embodiment of the present utility model;

FIG. 14 is a schematic view of the structure at C in FIG. 13;

FIG. 15 is a schematic view of the back structure of the cartridge assembly of the first embodiment of the present utility model;

FIG. 16 is a schematic view of the structure of a first ejector pin blade according to the first embodiment of the present utility model;

FIG. 17 is a schematic view of the structure of the first ejector pin blade of the first embodiment of the present utility model at another angle;

FIG. 18 is a schematic view showing the structure of the holding groove of the first ejector pin blade according to the first embodiment of the present utility model;

FIG. 19 is a cross-sectional view taken at A-A' of FIG. 15 of a first embodiment of the present utility model;

FIG. 20 is a cross-sectional view at B-B' in FIG. 15 of the first embodiment of the present utility model;

FIG. 21 is a cross-sectional view taken at A-A' of FIG. 15, showing the configuration of the mating portion and the inner sidewall in one example, in accordance with the first embodiment of the present utility model;

FIG. 22 is a cross-sectional view taken at A-A' of FIG. 15, showing the configuration of the mating portion and the inner sidewall in another example, in accordance with the first embodiment of the present utility model;

FIG. 23 is a schematic structural view of a staple cartridge assembly of a first embodiment of the present utility model;

FIG. 24 is a partial schematic view at E in FIG. 23;

FIG. 25 is a schematic view of the structure of a second ejector pin blade according to the first embodiment of the present utility model;

FIG. 26a is a partial schematic view of FIG. 13D;

FIG. 26b is a partial schematic view of FIG. 15 at F;

FIG. 27 is a schematic view of the structure of a staple cartridge assembly of a second embodiment of the present utility model;

FIG. 28 is a schematic view of the back structure of a staple cartridge assembly of a second embodiment of the present utility model;

FIG. 29 is a partial schematic view of the back of the cartridge assembly of the second embodiment of the present utility model;

fig. 30 is a schematic structural view of a first ejector pin sheet according to a second embodiment of the present utility model.

Fig. 31 is a schematic view showing the structure of the first ejector pin sheet according to the second embodiment of the present utility model in an initial state.

Wherein:

100. a jaw assembly; 110. a staple cartridge holder; 111. a spring plate; 112. a cartridge seat slot; 120. a nail supporting seat; 200. an operating assembly; 210. a power module; 220. a motor; 300. a shaft assembly; 310. a mandrel; 320. a sleeve; 400. a cutter assembly; 410. a push knife; 411. a body; 412. a compression end; 413. a slot; 420. a cutting knife; 421. a support section; 422. a clamping part; 423. a first protrusion; 424. a convex plate; 500. a staple cartridge assembly; 510. a cartridge body; 511. a feed groove; 5121. a first portion; 51. a second portion; 513. a nail surface is formed; 514. a staple cartridge sidewall; 5141. a first concave portion; 5142. a boss; 5143. a second guide groove; 515. a middle side wall; 516. an inner sidewall; 5161. a guide groove; 5162. a first guide portion; 5163. a first wall; 5164. a second wall; 5165. a third wall; 5171. a first travel groove; 5172. a second travel groove; 520. a staple cavity; 521. an arc section; 522. a limit groove; 523. a first row of staple cavities; 524. a second row of staple cavities; 525. a third row of staple cavities; 530. a staple; 540. nail pushing sheets; 541. a first ejector pin sheet; 5411. a first ejector pin sheet body; 5412. a mating portion; 54121. a first side; 54122. a second side; 54123. a third side; 5143. a firing section; 51431. an auxiliary guide portion; 5414. a third ejector pin sheet body; 5415. a second guide portion; 5416. a second ejector pin sheet; 54161. a second ejector pin sheet body; 54162. a second mating portion; 54163. a second firing section; 54111. a support groove; 543. a first convex portion; 550. a staple pusher; 551. convex ribs; 5510. a mating portion; 552. fins; 553. a bottom plate; 560. a guide slope; 600. a limiting mechanism; 610. a first groove.

Detailed Description

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

It is to be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a handle of a stapler. The term "proximal" refers to the portion proximal to the clinician, and the term "distal" refers to the portion distal to the clinician. I.e., the handles are proximal and the jaw assembly is distal, e.g., the proximal end of a component represents an end relatively close to the handles and the distal end represents an end relatively close to the jaw assembly. The terms "upper" and "lower" refer to the relative positions of the staple abutment and the cartridge abutment of the jaw assembly, specifically the staple abutment being "upper" and the cartridge abutment being "lower". However, the stapler can be used in many orientations and positions, and thus these terms expressing relative positional relationships are not limiting and absolute. For example, for convenience of description, the present utility model will define in part the up and down directions of the cartridge assembly as: the nail-discharging surface is arranged below the nail pusher, and the nail pusher pushes the nail pushing sheet to move along the depth direction of the nail cavity, namely to move downwards during firing, and although the upper direction and the lower direction are not consistent with the definition in the previous content, the definition of the directions is only for convenience of description, and the definition of the directions does not mean that the structure is changed.

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

Example 1

The present embodiment discloses a cartridge assembly for a surgical instrument, which may be a stapler, as shown in fig. 1-3 a, the surgical instrument comprising an end effector, a cutting blade assembly 400, a shaft assembly 300, an operating assembly 200, the end effector comprising a jaw assembly 100 and a cartridge assembly 500, the jaw assembly 100 comprising a cartridge housing 110 and a staple abutment 120, the cartridge assembly 500 being detachably mounted to the cartridge housing 110. The anvil 120 is rotatably coupled to the cartridge housing 110 and the jaw assembly 100 has an open state and a closed state, with the sleeve 320 of the shaft assembly 300 being moved back and forth to selectively move the anvil 120 between the open and closed positions in response to operation of the operating assembly 200 by a medical professional to switch the jaw assembly 100 between the open and closed states. When the jaw assembly 100 is in the open state, human tissue may enter the jaw assembly 100, and when the jaw assembly 100 is in the closed state, human tissue is clamped. In response to operation of the operating assembly 200 by a medical practitioner, the mandrel of the shaft assembly 300 is moved to drive the cutter assembly 400 to advance to cut tissue, and during the advancement of the cutter 420, staples 530 in the cartridge assembly 500 are simultaneously fired to suture the incision of tissue, preventing blood from exuding from the incision.

When the cartridge module 500 is not installed in the cartridge holder 110 or the used cartridge module 500 is installed, the cutter assembly 400 is only cut and cannot be sutured when moving, resulting in bleeding to damage the human body and affecting the operation. The cutter assembly 400 of the surgical instrument thus has an empty cartridge protecting structure, and when a cartridge is not installed in the cartridge holder 110 or a used cartridge is installed, the cutter assembly 400 cannot be advanced when a medical staff performs a feeding operation on the operation assembly 200, so as to avoid damaging a human body and affecting a surgery.

The surgical instrument includes a drive mechanism, as shown in fig. 3b, and the operating assembly 200 includes a power module 210, a motor 220. The power module 210 is used for supplying power to the motor 220, the motor 220 is connected with the transmission mechanism, and when the motor 220 obtains the electric energy provided by the power module 210 to work, the motor 220 outputs power to drive the transmission mechanism to move. The shaft assembly 300 includes a mandrel 310 and a sleeve 320 sleeved on the mandrel 310. One end of the sleeve 320 is connected to the transmission mechanism, and can move along the length direction of the sleeve 320 under the driving of the transmission mechanism, the other end of the sleeve 320 is connected to the nail supporting seat 120, and the sleeve 320 moves forward to enable the nail supporting seat 120 to pivot downwards to close the jaw assembly 100, and conversely, the jaw assembly 100 is opened.

As shown in fig. 3b to 5, the cutter assembly 400 is drivingly connected to the motor 220 such that the motor 220 can drive the cutter assembly 400 forward to perform cutting. The drive connection described above enables motor 220 to drive cutter assembly 400 via a drive mechanism. The particular cutting blade assembly 400 includes a pusher blade 410 and a cutting blade 420 detachably mounted to the pusher blade 410. Cartridge assembly 500 includes a cartridge body 510, cartridge body 510 being provided with a channel for feeding cutter assembly 400, specifically a feed slot 511. The feed groove 511 is provided so as to penetrate the cartridge main body 510, and the central axis of the feed groove 511 coincides with the central axis of the cartridge module 500. The mandrel 310 has two ends, one end connected to a transmission mechanism and the other end located within the sleeve 320. A portion of the push-cutter 410 is located within the sleeve 320 and is connected to the other end of the mandrel 310, and another portion of the push-cutter 410 is connected to the cutting blade 420. The drive mechanism may drive the spindle 310 forward and backward, and when the cartridge assembly 500 is installed, the spindle 310 moves forward causing the cutter assembly 400 to move forward, cutting tissue and pushing staples 530 of the cartridge assembly 500 out of the staples to staple the tissue, and the spindle 310 moves backward causing the cutter assembly 400 to move backward.

Further, as shown in fig. 4 and 8, the push blade 410 includes a body 411 extending in the longitudinal direction and a pressed portion 412 provided at the distal end of the body 411. A slot 413 is formed between the pressure receiving portion 412 and the body 411. The cartridge bay 110 is also provided with a spring 111, which spring 111 can be inserted into the slot 413 to apply a downward force thereto. As shown in fig. 8, the elastic piece 111 is inserted into the slot 413 to press the push-knife element 410 downward.

Further, as shown in fig. 4, the cutter 420 includes a supporting portion 421 and a locking portion 422. The engaging portion 422 is located at the lower side of the cutter 420. A supporting portion 421 is provided on the upper side of the cutter 420. The engaging portion 422 corresponds to the position of the supporting portion 421, and the engaging portion 422 and the supporting portion 421 form an i shape together. Further, as shown in fig. 6, the cartridge housing 110 is provided with a cartridge housing pocket 112. The nail holder 120 is provided with a nail holder groove (not shown in the drawings). The cutter 420 penetrates through the nail supporting seat groove and the nail cartridge seat groove 122, so that the clamping part 422 is positioned in a first accommodating space extending along the longitudinal direction at the lower part of the nail cartridge seat 110, and the supporting part 421 is positioned in a second accommodating space extending along the longitudinal direction at the upper part of the nail supporting seat 120, so that the stability of the movement of the cutter 420 is maintained.

Further, the cartridge holder 110 has a first position at a proximal end and a safety position at a front side of the first position, the cartridge holder 110 is provided with a limiting mechanism 600, the cartridge assembly 500 is mounted in front of the limiting mechanism 600, and the limiting mechanism 600 is used for limiting the cutter assembly 400 at the safety position;

as shown in fig. 6 to 10, the cutter assembly 400 in fig. 10 is in the first position, the cutter assembly in fig. 8 is in the safety position, and the limiting mechanism 600 is used to limit the cutter assembly 400 in the safety position. Further, the cutter assembly 400 is provided with a limit portion. The stop cooperates with the stop mechanism 600 to stop the cutter assembly 400 in the safety position. Specifically, the stop mechanism 600 is a first groove 610 disposed in the cartridge bay 110. Further, the limiting portion is a first protrusion 423 disposed on the cutting blade 420. The first projection 423 is located below the boss 424. The first groove 610 is for the first protrusion 423 to be inserted, limiting the forward movement of the cutter assembly 400; such that when cartridge holder 110 is mounted with a used cartridge assembly 500 or a non-mounted cartridge assembly 500, the cutter assembly 400 can be mechanically restrained from moving forward by the restraining mechanism 600 because the lifting mechanism of the used cartridge assembly 500 travels to the distal end of cartridge holder 110 without the lifting mechanism of the non-mounted cartridge assembly 500, thereby preventing actuation of cutter assembly 400 by motor 220, as described below with respect to the lifting mechanism. Further, as shown in fig. 7 and 8, the front end of the first groove 610 is a safety position. That is, when the first protrusion 423 is inserted into the first recess 610 and abuts against the front end of the first recess 610, the cutter assembly 400 cannot move forward, and is limited to the front end of the first recess 610.

On the other hand, when the unused cartridge assembly 500 is installed within the cartridge housing 110, the cutter assembly 400 can be fired forward beyond the safe position.

As shown in fig. 10-12, the cartridge assembly 500 further includes a staple pusher 550, the staple pusher 550 having a lifting mechanism. The lifting mechanism is provided with an engagement portion 5510 for engaging with the front end of the cutter 420. The front end of the cutter blade 420 mates with the mating portion 5510 of the lifting mechanism to allow the cutter blade assembly 400 to move forward beyond the limit mechanism 600 toward the safe position. As shown in fig. 10, the front end of the cutter 420 is provided with a boss 424. The boss 424 is adapted to mate with a mating portion 5510 of the lifting mechanism. As shown in fig. 11 to 12, the lifting mechanism is plate-shaped. The lifting mechanism can cooperate with the convex plate 424 of the cutter 420 to lift the cutter assembly 400, so that the first protrusion 423 is not inserted into the first groove 610 when the cutter assembly 400 moves forward, and the cutter assembly 400 can move forward smoothly through the limiting mechanism 600 to complete feeding.

Further, as shown in fig. 7 and 8, when cartridge holder 110 is installed with a used cartridge assembly 500, the lift mechanism of cartridge assembly 500 has been pushed away from its proximal end and therefore there is no lift mechanism at the proximal end. When the cutter 420 moves forward, the cutter 420 moves downward under the action of the elastic sheet 111, so that the first protrusion 423 falls into the first groove 610, and the first protrusion 423 abuts against the front end of the first groove 610 to block the cutter 420 from moving forward. When the cartridge holder 110 is not mounted with the cartridge assembly 500, the lift mechanism is not provided in the cartridge holder 120, and similarly, the first protrusion 423 will also fall into the first recess 610. As shown in fig. 9 and 10, when the unused cartridge assembly 500 is installed on the moving track of the abutment 120, the proximal end of the unused cartridge assembly 500 abuts against the safety position and the lifting mechanism abuts against the safety position. When the cutter 420 is at the first position, the lifting mechanism pushes the protrusion plate 424 of the cutter 420 upward, so as to resist the downward force applied by the spring 111 to the cutter 420, and the first protrusion 423 cannot fall into the first groove 610, so that the cutter 420 is lifted up and can smoothly slide through the first groove 610, and can move forward continuously, i.e. the lifting mechanism can make the cutter assembly 400 smoothly move forward towards the safety position through the limiting mechanism 600. The empty nail bin limiting assembly is only initially introduced, and a specific structure can be added in the prior application CN202011453501.7.

As shown in fig. 13, the feeding slot 511 divides the cartridge main body 510 into a first portion 5121 and a second portion 5122, and each of the first portion 5121 and the second portion 5122 includes a staple outlet face 513, a cartridge side wall 514, an inner side wall 516 and a middle side wall 515, wherein the cartridge side wall 514, the inner side wall 516 and the middle side wall 515 are disposed parallel to each other and are located at one side of the staple outlet face 513, and specifically, each of the cartridge side wall 514, the inner side wall 516 and the middle side wall 515 is perpendicular to the staple outlet face 513. The cartridge sidewall 514 is disposed on one side of the cartridge body 510, and the middle sidewall 515 is disposed between the cartridge sidewall 514 and the inner sidewall 516, and a feed slot 511 is defined between the inner sidewall 516 of the first portion 5121 and the inner sidewall 516 of the second portion 5122. The cartridge body is provided with at least two rows of staple cavities 520, a first row of staple cavities 523 and a second row of staple cavities 524, respectively. The outlets of the rows of staple cavities 520 are located on the staple exit face 513. In this embodiment, the first row of staple cavities 523 is disposed proximate to the feed slot 511 and the second row of staple cavities 524 is disposed distal to the feed slot 511.

As shown in fig. 3a and 14, cartridge assembly 500 further includes a plurality of staples 530 disposed within each staple cavity 520, wherein staples 530 move upward in the depth direction of staple cavities 520 as fired, moving from staple ejection face 513 toward anvil 120.

15-17, cartridge assembly 500 further includes a plurality of pusher plates 540, wherein pusher plates 540 include a first pusher plate 541 disposed in first row of staple cavities 523 and a second pusher plate 542 disposed in second row of staple cavities 524, and wherein first pusher plate 541 includes a first pusher plate body 5411 and a mating portion 5412, and wherein first pusher plate body 5411 is positioned within one of staple cavities 520 in first row of staple cavities 523 to support staples 530, and mating portion 5412 is positioned outside staple cavities 520, and wherein pusher plates 540 are urged to displace in a depth direction of staple cavities 520 to fire staples 530.

As shown in fig. 11, 12 and 15, the nail cartridge assembly 500 further includes a nail pusher 550 disposed on the nail cartridge main body 510, the nail pusher 550 includes a rib 551 disposed in the feed slot 511, and a fin 552 disposed in the travel slot, and the lifting mechanism is specifically disposed on the rib 551, and when the cutter assembly 400 advances, pushes the nail pusher 550 to move so that the rib 551 moves in the feed slot 511, and the fin 552 moves in the travel slot, and specifically, the fin 552 is a plate disposed in an inclined manner and is partially embedded in the first travel slot 5171 and the second travel slot 5172. When the fins 552 move in the first and second advancing grooves 5171 and 5172, the staple pushing plate 540 can be pushed to slide along the depth direction of the staple cavity 520, so that the staple pushing plate 540 and the staples 530 slide along the depth direction of the staple cavity 520, and the firing of the staples 530 is realized.

Staple pusher 550 further includes a base plate 553, and ribs 551 and fins 552 are disposed on base plate 553 and are generally perpendicular to base plate 553. When the staple pusher 550 is mounted on the cartridge body 510, the ribs 551 enter the feed grooves 511, and the fins 552 enter the corresponding travel grooves.

The inner sidewall 516 and the middle sidewall 515 enclose a first advancing groove 5171, the middle sidewall 515 encloses a second advancing groove 5172 with the side wall 514 of the staple cartridge, the first staple pushing plate 541 further includes a firing portion 5143, the firing portion 5143 is connected to the first staple pushing plate body 5411 and is disposed corresponding to the first advancing groove 5171, and when the fins 552 of the staple pusher 550 move in the first advancing groove 5171, the firing portion 5143 is abutted and pushed to move along the depth direction of the first advancing groove 5171, so as to push the first staple pushing plate 541 to move along the depth direction of the staple cavity 520. The second ejector pin 5416 includes a second ejector pin body 54161 and a second firing portion 54163, the second ejector pin body 54161 is disposed in one of the staple cavities 520 of the second row of staple cavities 524 to support the staples 530, and the second firing portion 54163 is disposed corresponding to the second travel groove 5172 to be abutted and pushed by the fins 552 of the ejector 550 to move along the depth direction of the second travel groove 5172, thereby causing the second ejector pin 5416 to be fired. The depth direction of the staple cavity 520, the depth direction of the first advancing groove 5171 and the depth direction of the second advancing groove 5172 are the same, and are all the thickness direction of the staple cartridge main body 510. Further, as shown in fig. 14, the inner side wall 516 is provided with a plurality of guide grooves 5161, the depth direction of the guide grooves 5161 is also the thickness direction of the cartridge main body 510, each guide groove 5161 corresponds to each staple cavity 520 of the first row of staple cavities 523, the guide grooves 5161 are used for being matched with the matching portion 5412, and the staple pushing sheets 540 are guided to displace along the depth direction of the staple cavities 520, so that the staple pushing sheets 540 move more stably in the firing process.

In this embodiment, as shown in fig. 16 and 17, the engaging portion 5412 is disposed on the firing portion 5143, and the firing portion 5143 is protruded in the direction of the inner sidewall 516 between the first staple pusher body 5411 and the engaging portion 5412. The guide groove 5161 is concavely opened at a side of the inner sidewall 516 toward the engaging portion 5412 and communicates with the first advancing groove 5171. One side of the first pushing plate 541 is limited by the first pushing plate body 5411 and the staple cavity 520 in a matched manner, and the other side of the first pushing plate 541 is limited by the matching portion 5412 and the guide groove 5161 in a matched manner, so that the first pushing plate 541 moves stably when being displaced along the depth direction of the staple cavity 520, and the firing of the staples 530 is more stable.

In a surgical instrument without the above-described empty cartridge protection feature, the height of the middle side wall 515 relative to the staple ejection face 513 is approximately the same as the height of the inner side wall 516 relative to the staple ejection face 513, and the cutter assembly 400 is moved with the blade in the feed slot 511 (i.e., between the inner side wall 516 of the first portion 5121 and the inner side wall 516 of the second portion 5122) during advancement without interference from the inner side wall 516. In the present embodiment, since the first protrusions 423 are disposed on both sides of the cutter 420 in the empty cartridge protecting structure, the first protrusions 423 are disposed to extend in the width direction of the cutter 420. After the cutter 420 is lifted, if the inner sidewall 516 maintains the original height, the first protrusion 423 is higher than one end of the inner sidewall 516 away from the staple discharging surface 513, and the cutter 420 interferes with the inner sidewall 516 during the advancing process. As shown in fig. 19, the height of the inner sidewall 516 relative to the staple discharging surface 513 in the present embodiment is reduced to avoid the first protrusion 423, so that the height of the limiting portion relative to the staple discharging surface 513 is higher than the height of the inner sidewall 516 relative to the staple discharging surface 513 when the limiting portion moves, thereby enabling the cutter 420 to slide smoothly in the feed slot 511.

As shown in fig. 19 and 20, after the stapling is completed, the first ejector blade 541 is in an initial position, the tip of the staple 530 is close to the staple ejection face 513, the first ejector blade body 5411 supports the staple 530, the engaging portion 5412 corresponds to the guide groove 5161 in the depth direction, and since the height of the inner sidewall 516 is reduced, the height of the inner sidewall 516 with respect to the staple ejection face 513 is lower than the height of the engaging portion 5412 with respect to the staple ejection face 513, so that the engaging portion 5412 is higher than the guide groove 5161 and separated from the guide groove 5161. That is, when the first pushing plate 541 is located at the initial position, the engaging portion 5412 is not located in the guide groove 5161, so that the position stability of the first pushing plate 541 in the width direction of the cartridge main body 510 is poor, and therefore, when the first pushing plate 541 is pushed by the fin 552 to move downward, the engaging portion 5412 is easily abutted against the top of the inner sidewall 516 due to the unstable position, resulting in a problem that the engaging portion 5412 cannot enter the guide groove 5161, and the pushing plate 540 and the staples 530 cannot be fired, the cutter 420 and the staple pusher 550 cannot be advanced continuously.

The engaging portion 5412 further has a function of limiting a firing position of the ejector pin sheet, and specifically, when the staples 530 are fired, the first ejector pin sheet body 5411 moves along the depth direction of the staple cavity 520, and has a limiting position to prevent the first ejector pin sheet body 5411 from being separated from the staple cavity 520. In this limit position, the engaging portion 5412 abuts against the surface of the staple ejection face 513 on the side away from the outlet of the staple chamber 520 to bring the first push plate body 5411 to the limit position, so that the engaging portion 5412 has a function of restricting the firing position of the first push plate 541, and the legs of the staples 530 have a certain length, and the ends of the legs of the unfired staples 530 cannot be exposed to the staple face 513, which requires that the distance between the first push plate 541 for supporting the staples and the staple ejection face 513 is required to satisfy the above-described requirement, and therefore, the length thereof in the depth direction of the staple chamber 520 cannot be reduced as the height of the inner side wall 516 relative to the staple ejection face 513 is reduced. Therefore, after the height of the inner side wall 516 with respect to the stapling surface 513 is lowered, the engaging portion 5412 is located at a position higher than the inner side wall 516.

As shown in fig. 15 to 17, in order to enable the engaging portion 5412 to smoothly enter the guide groove 5161 and ensure that the firing is smoothly and stably performed, in this embodiment, the guide groove 5161 is provided with a first guide portion 5162 and/or the engaging portion 5412 is provided with a second guide portion 5415. The first guide portion 5162 and the second guide portion 5415 are independently used to guide the engaging portion 5412 into the guide groove 5161, or the first guide portion 5162 is engaged with the second guide portion 5415 to guide the engaging portion 5412 into the guide groove 5161. So as to avoid the situation that the engaging portion 5412 is blocked by the inner sidewall 516 in the downward moving process, and can not be fired.

In a preferred embodiment, the first guide portion 5162 and the second guide portion 5415 are guide inclined surfaces 560, and in other embodiments, the first guide portion 5162 and the second guide portion 5415 may be other guide curved surfaces. When the first guide portion 5162 is mated with the second guide portion 5415, the shapes of the first guide portion 5162 and the second guide portion 5415 may be the same or different. In the present embodiment, the first guide portion 5162 and the second guide portion 5415 are merely used as the guide inclined surface 560, and are not particularly limited.

As shown in fig. 14, the guide groove 5161 has a first wall 5163, a second wall 5164 provided on one side of the first wall 5163, and a third wall 5165 provided on the other side of the first wall 5163, the first wall 5163 being parallel to the surface of the inner sidewall 516, the second wall 5164 and the third wall 5165 each being at an angle to the first wall 5163, preferably, the second wall 5164 and the third wall 5165 each being at an obtuse angle to the first wall 5163 such that the guide groove 5161 has a generally trapezoidal cross section for facilitating entry of the fitting 5412. Of course, in other embodiments, the second wall 5164 and the third wall 5165 can also form an acute angle or a right angle with the first wall 5163, which is not particularly limited in this embodiment. Accordingly, as shown in fig. 16, the engaging portion 5412 has a first side 54121 engaged with the first wall 5163, a second side 54122 engaged with the second wall 5164, and a third side 54123 engaged with the third wall 5165, and the second side 54122 and the third side 54123 are respectively located at two sides of the first side 54121, and an included angle with the first side 54121 is also an obtuse angle and is the same as an angle between the second wall 5164 and the first wall 5163, and an angle between the third wall 5165 and the first wall 5163. When the engaging portion 5412 enters the guide groove 5161, the first side 54121 is engaged with the first wall 5163, the second side 54122 is engaged with the second wall 5164, and the third side 54123 is engaged with the third wall 5165 to better guide the engaging portion 5412 to slide in the guide groove 5161. At least one of the first wall 5163, the second wall 5164, and the third wall 5165 is provided with a first guide 5162, and at least one of the first side 54121, the second side 54122, and the third side 54123 is provided with a second guide 5415. For example, one or both of the first wall 5163, the second wall 5164, and the third wall 5165 are provided with a first guide 5162, and/or one or both of the first side 54121, the second side 54122, and the third side 54123 are provided with a second guide 5415. The present embodiment is not particularly limited.

In a preferred embodiment, as shown in fig. 14 to 20, the first wall 5163, the second wall 5164 and the third wall 5165 of the guide groove 5161 are each provided with a first guide portion 5162 (guide inclined surface 560), the first side 54121, the second side 54122 and the third side 54123 of the engaging portion 5412 are each provided with a second guide portion 5415 (guide inclined surface 560), when the first staple pusher 541 is pushed by the staple pusher 550 to move in the depth direction of the staple cavity 520, the guide inclined surface 560 of the first side 54121 engages the guide inclined surface 560 of the first wall 5163, the guide inclined surface 560 of the second side 54122 engages the guide inclined surface 560 of the second wall 5164, the guide inclined surface 560 of the third side 54123 engages the guide inclined surface 560 of the third wall 5165, and the engaging portion 5412 is guided into the guide groove 5161 by the engagement of the first guide portion 5162 with the second guide portion 5415, and the engaging portion 5412 is slid in the depth direction of the guide groove 5161 after some portions are entered into the guide groove 5161.

Wherein, the slope of the guiding inclined plane 560 of the first guiding portion 5162 is substantially the same as that of the guiding inclined plane 560 of the second guiding portion 5415, and when the first guiding portion 5162 is matched with the second guiding portion 5415, the two guiding inclined planes 560 can be mostly and even completely matched, so as to improve the guiding effect. In addition, the firing portion 5143 is provided with an auxiliary guide portion 51431, the auxiliary guide portion 51431 is connected to the second guide portion 5415, the auxiliary guide portion 51431 is substantially inclined with the same slope as the second guide portion 5415, and the auxiliary guide portion 51431 is connected to the second guide portion 5415 to increase the area engaged with the first guide portion 5162, thereby improving the guiding effect.

As shown in fig. 14 and 21, in an embodiment, the guide groove 5161 is provided with a first guide portion 5162, and further, the first wall 5163, the second wall 5164, and the third wall 5165 are each provided with the first guide portion 5162, and the engaging portion 5412 is not provided with the second guide portion 5415. Each first guide 5162 is a guide inclined surface 560 having a substantially uniform slope, and is provided on the top (side away from the staple discharging surface 513) of each wall. When the first ejector pin 541 is in the initial state, the engaging portion 5412 is higher than the first wall 5163, the second wall 5164 and the third wall 5165, and when the first ejector pin 541 is pushed by the ejector pin 550 to move along the depth direction of the pin cavity 520, the first side 54121 of the engaging portion 5412 abuts against the guiding inclined plane 560 of the first wall 5163, the second side 54122 abuts against the guiding inclined plane 560 of the second wall 5164, and the third side 54123 abuts against the guiding inclined plane 560 of the third wall 5165. Each guide slope 560 guides the engaging portion 5412, and guides the engaging portion 5412 into the guide groove 5161, and the engaging portion 5412 partially enters the guide groove 5161 and slides along the depth direction of the guide groove 5161.

It should be noted that, before the first push pin 541 is pushed to displace, the first push pin body 5411 is accommodated in the pin cavity 520, so that a gap between the first push pin body 5411 and the pin cavity 520 is smaller, and the offset of the first push pin body 5411 in the pin cavity 520 is smaller, and the situation that the end of the fitting portion 5412, which is close to the inner sidewall 516, exceeds the guiding inclined plane 560 of the first wall 5163 and abuts against the top of the inner sidewall 516, so that the guiding inclined plane 560 cannot guide the fitting portion 5412 is avoided.

As shown in fig. 17 and 22, in another embodiment, the engaging portion 5412 is provided with a second guiding portion 5415, the second guiding portion 5415 is provided on at least one of the first side 54121, the second side 54122 and the third side 54123, and the groove wall of the guiding groove 5161 is not provided with the first guiding portion 5162. Each of the second guiding portions 5415 is a guiding inclined surface 560 having substantially the same slope, and is disposed at the bottom of each side (the side facing the staple ejection face 513), and when the first staple pushing plate 541 is in the initial state, the first side 54121, the second side 54122, and the third side 54123 of the engaging portion 5412 are higher than the guiding groove 5161, and when the first staple pushing plate 541 is pushed by the staple pusher 550 to move along the depth direction of the staple cavity 520, the guiding inclined surface 560 of the first side 54121 of the engaging portion 5412 abuts against the first wall 5163, the guiding inclined surface 560 of the second side 54122 abuts against the second wall 5164, and the guiding inclined surface 560 of the third side 54123 abuts against the third wall 5165. Each guide slope 560 guides the engaging portion 5412, and guides the engaging portion 5412 into the guide groove 5161, and the engaging portion 5412 partially enters the guide groove 5161 and slides along the depth direction of the guide groove 5161.

Through the arrangement of the first guide portion 5162 and/or the second guide portion 5415, the matching portion 5412 can smoothly enter the guide groove 5161, so that the first push pin plate 541 is prevented from being clamped in the process of firing the staples 530, guiding is provided for movement of the first push pin plate 541, and stability of movement of the first push pin plate 541 and stability of firing of the staples 530 are improved.

It should be noted that, as shown in fig. 25 and 26a, the second ejector plate 5416 includes a second ejector plate body 54161 and a second engaging portion 54162, and the cartridge side wall 514 is provided with a second guiding groove 5143, and in this embodiment, since the first protrusion 423 of the cutter 420 has a limited size in the width direction of the cartridge main body 510 and does not interfere with the cartridge side wall 514, the cartridge side wall 514 does not need to be lowered to be unseated, and is higher than the inner side wall 516. The height of cartridge sidewall 514 refers to the height of cartridge sidewall 514 relative to staple exit face 513. In the initial state, the second fitting portion 54162 of the second staple pushing plate 5416 partially enters the second guide groove 5143, and thus the second guide groove 5143 and the second fitting portion 54162 do not need to be provided with guide portions to guide the second fitting portion 54162 into the second guide groove 5143.

In this embodiment, the staple outlet face 513 is only provided with two rows of staple cavities 520, that is, a first row of staple cavities 523 and a second row of staple cavities 524, where the first row of staple cavities 523 and the second row of staple cavities 524 are all disposed on the middle sidewall 515, although the second row of staple cavities 524 may also be disposed on the staple bin sidewall 514, which is not specifically limited in this embodiment. The crowns of staples 530 are arcuate to prevent the occurrence of bleeding and leakage of the incision after stapling the tissue. As shown in fig. 13 and 18, the nail cavity 520 has an arc-shaped section 521, the nail pushing sheet 540 is arranged in an arc shape, and is accommodated in the nail cavity 520, a supporting groove 54111 at the top of the nail pushing sheet 540 extends along an arc line to support a crown, the curvature of the arc line is the same as that of the crown, the cross section of the supporting groove 54111 is semicircular, the cross section of the crown is generally circular, and when the crown is supported, the supporting groove 54111 can be attached to the outer wall of the crown, so that better supporting effect is obtained, shaking of the staples 530 in the nail cavity 520 is avoided, and the firing stability is improved.

Further, as shown in fig. 24 to 26b, the cartridge body has a plurality of staple cavities 520, the staple cavities 520 include staple cavity bodies and a limiting groove 522 communicating with the staple cavity bodies, and the arc-shaped segments 521 belong to the staple cavity bodies. The limiting grooves 522 are formed in two and are respectively arranged on two sides of the nail cavity body. After the anastomat 530 is installed in the nail cavity 520, two nail legs are respectively contained in the two limiting grooves 522, the width of the limiting grooves 522 is approximately the same as the outer diameter of the nail legs, the nail legs can be well contained and limited, the nail legs can be kept in position when being contained, shaking in the nail cavity 520 is avoided, the nail legs can be displaced along the direction limited by the limiting grooves 522 when being triggered, and the triggering stability is improved.

In addition, as shown in fig. 25 to 26b, in the present application, the second mating portion 54162 is provided with the first protruding portion 543, the side wall 514 of the staple cartridge is provided with the first recess 5141, and in the process that the firing portion 5143 is pushed to slide along the depth direction of the second advancing groove 5172, the first protruding portion 543 slides in the first recess 5141, and the cooperation of the first protruding portion 543 and the first recess 5141 makes the sliding of the firing portion 5143 along the depth direction of the second advancing groove 5172 more stable, so as to further improve the stability of firing. The first concave portion 5141 extends along the depth direction of the second travelling groove 5172, namely extends towards the nail outlet surface 513, in this embodiment, the first concave portion 5141 does not penetrate the nail outlet surface 513, so that the nail pushing plate 540 is prevented from being separated from the nail cavity 520.

Further, the cartridge side wall 514 is provided with a plurality of protruding portions 5142, the plurality of protruding portions 5142 are disposed corresponding to the plurality of staple cavities 520, the protruding portions 5142 are disposed on one side of the cartridge side wall 514 facing away from the staple outlet face 513, the first concave portions 5141 penetrate the protruding portions 5142, the protruding portions 5142 are used for lifting the depth of the first concave portions 5141, when the staple pushing plate 540 is located at the initial position, the first protruding portions 543 are located in the first concave portions 5141 completely, so that when the second firing portion 54163 is pushed by the fins 552, the second staple pushing plate 5416 slides along the depth direction of the second advancing groove 5172, the first protruding portions 543 can slide in the first concave portions 5141 to guide movement of the staple pushing plate 540.

The cartridge assembly 500 of the present embodiment is provided with a first guide portion 5162 through the guide groove 5161 and/or a second guide portion 5415 through the mating portion 5412, and the mating portion 5412 can enter the guide groove 5161, so that the guide groove 5161 can mate with the mating portion 5412, so as to promote the stability of the first staple pushing sheet 541 sliding along the depth direction of the staple cavity 520, and further promote the stability of the staples. In addition, by the cooperation of the first convex portion 543 and the first concave portion 5141, the second firing portion 54163 slides in the second advancing groove 5172 more stably, and the stability of the staple discharging is further improved.

Example 2

A second embodiment of the present application discloses a cartridge assembly that is generally identical to cartridge assembly 500 of the first embodiment, with the primary differences being: as shown in fig. 27 and 28, the staple outlet face 513 in the present embodiment further includes a third row of staple cavities 525, in this embodiment, the first row of staple cavities 523 are disposed on the inner sidewall and near the feeding slot 511, the second row of staple cavities are disposed on the side wall of the staple cartridge, and the third row of staple cavities are disposed on the middle sidewall and between the first row of staple cavities and the second row of staple cavities.

The third row of staple cavities 525 and the first row of staple cavities 523 are each in communication with the first travel slot 5171, and the third row of staple cavities 525 and the first row of staple cavities 523 are each located on either side of the first travel slot 5171, with the guide slots 5161 being disposed in the inner sidewall, and each guide slot 5161 being in communication with each staple cavity 520 in the first row of staple cavities 523, respectively.

As shown in fig. 29 to 31, the first staple pushing plate 541 includes a first staple pushing plate body 5411, a firing portion 5143, a third staple pushing plate body 5414, and a mating portion 5412, where the first staple pushing plate body 5411 corresponds to one of the staple cavities 520 in the first row of staple cavities 523 and is located in the corresponding staple cavity 520 to support the staples 530; third pusher body 5414 corresponds to one of the staple cavities 520 in third row of staple cavities 525 and is positioned within the corresponding staple cavity 520 to hold staples 530; the firing part 5143 is connected between the first ejector pin sheet body 5411 and the third ejector pin sheet body 5414 and is arranged corresponding to the first travel groove 5171; the engaging portion 5412 is provided on a side of the first staple pusher body 5411 facing the guide groove 5161.

When the first ejector pin piece 541 is located in the initial state, a portion of the first ejector pin piece body 5411 is located in the pin cavity 520, another portion of the first ejector pin piece body 5411 is located outside the pin cavity 520, and the mating portion 5412 is also located outside the pin cavity 520, so that the first ejector pin piece body 5411 is partially mated with the pin cavity 520, and since the thickness of the inner sidewall 516 at the position where the first row of pin cavities 523 are formed is thinner, deformation is easy to occur, and the position of the guide groove 5161 is unstable, the groove wall of the guide groove 5161 is provided with the first guide portion 5162 and/or the mating portion 5412 is provided with the second guide portion 5415, so that the mating portion 5412 is guided into the guide groove 5161, so as to promote the stability of the movement of the first ejector pin piece 541 along the depth direction of the pin cavity 520. The specific structure of the first guide portion 5162 and the second guide portion 5415 is the same as that of the first embodiment, and will not be described herein.

Example 3

A third embodiment of the present application discloses a surgical instrument, which may be a stapler, comprising a handle, a shaft assembly 300, a cutter assembly 400, and a jaw assembly 100, the shaft assembly 300 being connected between the jaw assembly 100, the jaw assembly 100 comprising a cartridge seat 110 and a staple abutment 120, the shaft assembly 300 driving the jaw assembly to switch from an open state to a closed state in response to actuation of the handle. The cutter assembly 400 is drivingly connected to the handle, and the cutter assembly 400 moves distally in response to actuation of the handle. The surgical instrument further includes a cartridge assembly 500 as in the first or second embodiments, the cartridge assembly 500 being removably mounted to the cartridge housing 110. The jaw assembly 100 is used for clamping human tissue, and when the cutter assembly 400 cuts the human tissue distally, the staple pusher 550 is pushed to fire the staples 530 in the cartridge assembly 500, so as to suture the incision. Because the firing of staples 530 in cartridge assembly 500 is more stable, the surgical instrument provides better stapling of the incision.

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

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

Claims (11)

1. A staple cartridge assembly, comprising:

the nail bin comprises a nail bin main body, wherein a feed groove is formed in the nail bin main body, the feed groove divides the nail bin main body into a first part and a second part, and the first part and the second part comprise a nail outlet surface, a nail bin side wall, an inner side wall and a middle side wall; the middle side wall is arranged between the inner side wall and the side wall of the nail bin, and the feeding groove is formed by surrounding the inner side wall of the first part and the inner side wall of the second part; the first part and the second part are respectively provided with at least two rows of pin cavities, the two rows of pin cavities are respectively a first row of pin cavities and a second row of pin cavities, and openings of the pin cavities of the first row of pin cavities and the second row of pin cavities are positioned on the pin outlet surface;

The staples are respectively arranged in the staple cavities;

the nail pushing plate comprises a first nail pushing plate arranged in the first row of nail cavities and a second nail pushing plate arranged in the second row of nail cavities; the first nail pushing plate comprises a first nail pushing plate body and a matching part, the first nail pushing plate body is positioned in one nail cavity of the first row of nail cavities to support the anastomat, the matching part is positioned outside the nail cavity, and the nail pushing plate is pushed to displace along the depth direction of the nail cavity so as to fire the anastomat;

the inner side wall is provided with a plurality of guide grooves, and each guide groove corresponds to each nail cavity of the first row of nail cavities one by one; the guide groove is matched with the matching part to guide the nail pushing piece to displace along the depth direction of the nail cavity;

when the first nail pushing piece is positioned at the initial position, the height of the inner side wall relative to the nail outlet surface is lower than the height of the matching part relative to the nail outlet surface, so that the matching part is higher than the guide groove and separated from the guide groove; the guide groove is provided with a first guide part and/or the matching part is provided with a second guide part, and the first guide part or the second guide part guides the matching part to enter the guide groove, or the first guide part and the second guide part are matched to guide the matching part to enter the guide groove.

2. The staple cartridge assembly of claim 1 wherein the first guide portion and/or the second guide portion is a guide ramp.

3. The staple cartridge assembly of claim 2 wherein said first guide portion is substantially or fully engaged with said second guide portion when said first guide portion is engaged with said second guide portion.

4. The staple cartridge assembly of claim 1 wherein said inner side wall and said middle side wall enclose a first travel slot, each staple cavity of said first row of staple cavities being in communication with said first travel slot, each said guide slot being in communication with said first travel slot; the first nail pushing plate further comprises a firing part, the firing part is connected to the first nail pushing plate body and is arranged corresponding to the first travelling groove, and the firing part is pushed by the nail pusher of the nail bin assembly along the depth direction of the first travelling groove so as to enable the first nail pushing plate to displace along the depth direction of the nail cavity;

the matching part is arranged on the firing part and protrudes towards the direction of the inner side wall, and the firing part is arranged between the matching part and the first nail pushing sheet.

5. The staple cartridge assembly of claim 4 wherein said firing portion is provided with an auxiliary guide portion, said auxiliary guide portion being connected to said second guide portion.

6. The staple cartridge assembly of claim 1 wherein said inner side wall and said middle side wall enclose a first travel slot, said first portion and/or said second portion further defining a third row of staple cavities, said third row of staple cavities being positioned between a first row of staple cavities and a second row of staple cavities, each staple cavity of said first row of staple cavities being disposed on said inner side wall and in communication with said first travel slot; each guide groove is communicated with each nail cavity of the first row of nail cavities;

the first nail pushing plate further comprises a firing part and a third nail pushing plate body, the third nail pushing plate body corresponds to one of the third nail cavities, and the firing part is connected between the first nail pushing plate body and the third nail pushing plate body; the third nail pushing plate body part is positioned in the corresponding nail cavity to support the anastomat, and the matching part is arranged on one side of the first nail pushing plate body, which faces the guide groove.

7. The staple cartridge assembly of claim 1 wherein said second staple pusher plate is provided with a first protrusion and said staple cartridge sidewall is provided with a first recess, said first recess cooperating with said first protrusion to guide the sliding movement of said staple pusher plate in the depth direction of said staple cavity.

8. The staple cartridge assembly of claim 1, wherein the staple cavity comprises a staple cavity body and limiting grooves communicated with the staple cavity body, two limiting grooves are formed and are respectively arranged on two sides of the staple cavity body, and two staple legs of the staples are respectively accommodated in the two limiting grooves.

9. The staple cartridge assembly of claim 1 wherein a staple pusher of said staple cartridge assembly is urged to move in a lengthwise direction by a cutter assembly; the cutter assembly comprises a limiting part which responds to the movement of the cutter assembly, the limiting part moves in the longitudinal direction in an area surrounded by the middle side wall of the first part and the middle side wall of the second part, and when the limiting part moves, the height of the limiting part relative to the nail discharging surface is higher than that of the inner side wall relative to the nail discharging surface, so that the height of the inner side wall relative to the nail discharging surface is lower than that of the matching part relative to the nail discharging surface.

10. The staple cartridge assembly of claim 1 wherein the first guide portion and/or the second guide portion is a guide curve.

11. A surgical instrument comprising a handle, a shaft assembly, a jaw assembly and a cutter assembly, the jaw assembly comprising a staple abutment and a staple cartridge abutment, the shaft assembly being connected to the jaw assembly, the shaft assembly driving the jaw assembly from an open state to a closed state in response to actuation of the handle; the cutter assembly is drivingly connected to the handle and is responsive to actuation of the handle for distal movement, wherein the surgical instrument further comprises the cartridge assembly of any one of claims 1-10, the cartridge assembly being removably mounted to the cartridge housing, the cutter assembly being configured to actuate a staple pusher of the cartridge assembly upon distal movement thereof to fire staples within the cartridge assembly.