Staple cartridge assembly and surgical instrument

Abstract

The utility model discloses a nail bin assembly and a surgical instrument, the nail bin assembly comprises a suturing part and an exposed part, the suturing part comprises suturing nail grooves arranged in the longitudinal direction, and suturing nails are contained in the suturing nail grooves; the length of the exposed part in the longitudinal direction is greater than or equal to 2.4 mm and less than or equal to 6 mm; the nail bin assembly further comprises nail pushing grooves and a nail pushing plate, the nail pushing grooves penetrate through the exposed part and the suturing part in the longitudinal direction, and when the nail bin assembly is in the initial state, the nail pushing plate is contained at the near ends of the nail pushing grooves; in response to the movement of the nail pushing plate towards the far side in the length direction of the nail pushing groove, the nail pushing plate pushes the suturing nails out of the suturing nail groove; the nail bin assembly further comprises a blocking part, the nail pushing plate abuts against the blocking part in response to the fact that the nail pushing plate moves towards the far side in the length direction of the nail pushing groove, the nail pushing plate is located at the farthest side position, and the nail pushing plate is contained at the far end of the nail pushing groove at the farthest side position. At the farthest side position, the nail pushing plate is completely located in the nail pushing groove, and tissue damage caused by exposure of the tip of the nail pushing plate is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of surgical instruments, and particularly to a staple cartridge assembly and a surgical instrument. Background Art

[0002] A surgical cutting stapler is a commonly used medical instrument to replace manual suturing. Its main working principle is to use a cutting blade to sever tissue and use titanium staples to anastomose tissue, similar to a stapler. According to the applicable different body parts, there are various types of staplers. For a surgical cutting stapler, its working principle is to enter the patient's body through the cannula of a trocar accurately positioned at the surgical site, and then make a longitudinal incision in the tissue and apply staples on the opposite side of the incision, so as to sever and anastomose the tissue. Summary of the Utility Model

[0003] The present disclosure is achieved by the following technical solutions: A staple cartridge assembly, the staple cartridge assembly includes a suturing part and an exposed part, the suturing part includes staple grooves arranged along the longitudinal direction, and suturing staples are received in the staple grooves;

[0004] The length of the exposed part in the longitudinal direction is greater than or equal to 2.4 mm and less than or equal to 6 mm;

[0005] The staple cartridge assembly further includes a staple pushing groove and a staple pushing plate. The staple pushing grooves penetrate through the exposed part and the suturing part along the longitudinal direction. When the staple cartridge assembly is in the initial state, the staple pushing plate is received at the proximal end of the staple pushing groove; in response to the staple pushing plate moving distally along the length direction of the staple pushing groove, the staple pushing plate pushes the suturing staples out of the staple grooves;

[0006] The staple cartridge assembly further includes a blocking portion. In response to the staple pushing plate moving distally along the length direction of the staple pushing groove, the staple pushing plate abuts against the blocking portion, so that the staple pushing plate is located at the farthest side position. At the farthest side position, the staple pushing plate is received at the distal end of the staple pushing groove.

[0007] In one embodiment, a plurality of staple pushing grooves are formed, the staple pushing plate includes a plurality of plate portions, each plate portion is received in a corresponding staple pushing groove, and when the staple cartridge assembly is in the initial state, each plate portion is respectively received at the proximal end of each staple pushing groove;

[0008] The staple pushing plate further includes shoulders connected between adjacent plate portions. When the staple pushing plate is located at the farthest side position, the shoulders abut against the blocking portion.

[0009] In one embodiment, the cartridge assembly includes a plurality of partitions located between two adjacent staple pushing grooves, and the blocking portion is disposed on the partition. When the staple pushing plate moves distally along the length direction of the staple pushing groove, the blocking portion is located on the movement path of the shoulder.

[0010] In one embodiment, the partition includes two inner partitions and two outer partitions arranged in the transverse direction. The two inner partitions are located between the two outer partitions, and the blocking portion is disposed on the inner partition and / or the outer partition.

[0011] In one embodiment, the exposed portion further includes a first free structure located at its lower part. The distal end of the first free structure is higher than the proximal end, and the staple pushing groove penetrates through the first free structure.

[0012] In one embodiment, the first free structure includes a first part and a second part. The first part is located on the upper side of the second part. The staple pushing groove penetrates through the second part. The blocking portion is located proximal to the second part and is connected to the proximal end of the second part.

[0013] In one embodiment, the second part includes a structural rib position, and the blocking portion is located proximal to the structural rib position and is connected to the structural rib position.

[0014] The present disclosure also provides a surgical instrument, including an end effector. The end effector includes a cartridge holder, an anvil pivotally connected to the cartridge holder, and the cartridge assembly as described above. The cartridge assembly is detachably mounted on the cartridge holder. When the cartridge assembly is mounted on the cartridge holder, the suturing portion is received in the cartridge holder, and the exposed portion is located outside the cartridge holder.

[0015] In one embodiment, the surgical instrument includes a first state and a second state. The surgical instrument further includes a knife driving mechanism and a cutting knife assembly connected to the knife driving mechanism. The cutting knife assembly is connected to the staple pushing plate. When the cartridge assembly is in the initial state, in response to the driving of the knife driving mechanism, the cutting knife assembly drives the staple pushing plate to move distally and stops the staple pushing plate at a preset position, thereby making the surgical instrument in the first state. In response to the knife driving mechanism driving the cutting knife assembly to drive the staple pushing plate to move distally along the length direction of the staple pushing groove and cross the preset position, the staple pushing plate abuts against the blocking portion, making the staple pushing plate located at the farthest side position, thereby making the surgical instrument in the second state. The farthest side position is located distally of the preset position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic structural view of a staple cartridge assembly according to an embodiment of the present disclosure;

[0017] Figure 2 It is a top view of a staple cartridge assembly according to an embodiment of the present disclosure;

[0018] Figure 3 It is a schematic structural view of a jaw assembly according to an embodiment of the present disclosure;

[0019] Figure 4 It is an exploded view of a staple cartridge assembly and a staple cartridge seat according to an embodiment of the present disclosure;

[0020] Figure 5 It is an exploded view of a cutting knife assembly and a jaw assembly according to an embodiment of the present disclosure;

[0021] Figure 6 It is a schematic structural view of a staple cartridge assembly in an initial state according to an embodiment of the present disclosure;

[0022] Figure 7 It is an exploded view of a staple cartridge assembly according to an embodiment of the present disclosure;

[0023] Figure 8 It is an embodiment of the present disclosure Figure 6 A cross-sectional view taken along line A-A;

[0024] Figure 9 It is a cross-sectional view of a pusher plate pushing a pusher piece according to an embodiment of the present disclosure;

[0025] Figure 10 It is a schematic structural view of a pusher plate in a farthest side position according to an embodiment of the present disclosure;

[0026] Figure 11 It is a cross-sectional view of a staple cartridge assembly when the pusher plate is in the farthest side position according to an embodiment of the present disclosure;

[0027] Figure 12 It is a schematic structural view of a pusher plate according to an embodiment of the present disclosure;

[0028] Figure 13 It is a front view of a pusher plate according to an embodiment of the present disclosure;

[0029] Figure 14 It is a schematic structural view of a first free surface of a staple cartridge assembly according to an embodiment of the present disclosure;

[0030] Figure 15 It is a schematic structural view of a feed drive mechanism according to an embodiment of the present disclosure.

[0031] Wherein:

[0032] 100, jaw assembly; 110, anvil; 120, cartridge seat; 200, cartridge assembly; 210, pusher groove; 211, feed groove; 212, cam groove; 213, first groove body; 214, second groove body; 2121, first cam groove; 2122, second cam groove; 220, partition; 221, inner partition; 222, outer partition; 230, exposed portion; 240, staple slot; 241, pusher; 242, staple; 250, stitching portion; 300, pusher plate; 310, plate body portion; 311, protruding portion; 312, cam plate; 320, shoulder; 321, inner shoulder; 322, outer shoulder; 330, tip; 400, first free surface; 410, first portion; 420, second portion; 430, structural rib position; 500, blocking portion; 600, cutting knife assembly; 700, feed drive mechanism; 710, motor; 720, motor gear; 730, large gear; 740, drive gear; 750, rack. Detailed implementation mode

[0033] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the following further describes the present disclosure in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0034] It should be understood that the terms "proximal" and "distal" used herein are relative to the clinician operating the handle of the stapler. The term "proximal" refers to the part close to the clinician, and the term "distal" refers to the part far from the clinician. That is, the handle is proximal and the jaw assembly is distal. For example, the proximal end of a component means the end relatively close to the handle, and the distal end means the end relatively close to the jaw assembly. The terms "upper" and "lower" refer to the relative positions of the anvil and the cartridge seat of the jaw assembly. Specifically, the anvil is "upper" and the cartridge seat is "lower". However, the stapler can be used in many directions and positions, so these terms expressing relative position relationships are not restrictive and absolute.

[0035] In the present disclosure, unless otherwise clearly specified and defined, terms such as "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, a movable connection, or an integral body; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components such as abutting. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. It should be noted that when there are limiting terms before "connected" and "coupled", they have the meanings defined by the corresponding limiting terms, only excluding the obvious cases that need to be excluded, and not excluding other possible cases. For example, "detachably connected" refers to a detachable connection, excluding being an integral body, but a movable connection and the like are not excluded.

[0036] The present disclosure provides a staple cartridge assembly, as Figures 1 to 4 shown, which is applied to a surgical instrument, for example, the surgical instrument is a stapler. The staple cartridge assembly 200 includes a stitching portion 250 and an exposed portion 230. The exposed portion 230 is located distally of the stitching portion 250 and is connected to the stitching portion 250. When using the staple cartridge assembly 200, the staple cartridge assembly 200 needs to be installed on the staple cartridge seat 120 of the surgical instrument. When the staple cartridge assembly 200 is installed on the staple cartridge seat 120, the exposed portion 230 is located outside the staple cartridge seat 120 and is located distally of the staple cartridge seat 120. The length of the exposed portion 230 in the longitudinal direction is greater than or equal to 2.4 mm and less than or equal to 6 mm. The longitudinal direction is the direction from proximal to distal of the staple cartridge assembly 200. The length of the exposed portion 230 of the staple cartridge assembly 200 in the prior art in the longitudinal direction is greater than 12 mm. Compared with the staple cartridge assembly 200 in the prior art, the length of the exposed portion 230 of the staple cartridge assembly 200 in the present disclosure in the longitudinal direction is shorter, thereby reducing the length of the staple cartridge assembly 200. In the face of a narrow surgical environment, the shorter staple cartridge assembly 200 in this embodiment can move flexibly in the narrow space.

[0037] The staple cartridge assembly 20 further includes a plurality of staple grooves 240 and a pusher groove 210. Suture staples 242 are disposed in the staple grooves 240. The staple grooves 240 are provided in multiple rows, and each row of staple grooves 240 is arranged along the longitudinal direction of the stitching portion 250. The pusher groove 210 is in communication with the staple grooves 240, and the pusher groove 210 extends through the staple cartridge assembly 200 in the longitudinal direction, that is, the pusher groove 210 extends through the stitching portion 250 and the exposed portion 230 in the longitudinal direction. As Figure 5 and Figure 6 shown, the staple cartridge assembly 200 further includes a pusher plate 300. When the staple cartridge assembly 200 is in the initial state, the pusher plate 300 is received at the proximal end of the pusher groove 210. The staple cartridge assembly 200 is in the initial state when the suture staples 242 are not fired.

[0038] AsFigure 3 and Figure 4 As shown, the surgical instrument also includes a nail support 110, which is pivotally connected to the nail magazine support 120. The nail support 110 and the nail magazine support 120 constitute a jaw assembly 100, and the jaw assembly 100 and the nail magazine assembly 20 constitute an end effector. The jaw assembly 100 has an open state and a closed state. When performing surgery, the user aligns the jaw assembly 100 in the open state with the target tissue, controls the jaw assembly 100 to switch from the open state to the closed state, clamps the target tissue, and then operates on the clamped target tissue. The surgical instrument also includes a cutting knife assembly 600, which is connected to the nail pusher plate 300. When the cutting knife assembly 600 moves distally, it cuts the clamped target tissue and simultaneously pushes the nail pusher plate 300 to fire the suture staples 242 located in the staple slot 240, thereby suturing the tissue.

[0039] like Figure 8 and Figure 9 As shown, when the firing operation is performed, in response to the staple pusher plate 300 moving distally along the longitudinal direction in the staple pusher slot 210 , the staple pusher plate 300 pushes the staples out of the staple slot 240 . The staple magazine assembly 200 also includes a staple pusher 241, a portion of which is located in the staple groove 240 to support the suture staple 242, and the other portion is located in the staple groove 210. When the staple pusher plate 300 moves distally in the staple groove 210, the staple pusher plate 300 pushes the staple pusher 241 to move upward, and the upward-moving staple pusher 241 drives the suture staple 242 to move upward in the staple groove 240 to fire the suture staple 242 located in the staple groove 240, wherein firing refers to the staple pusher 241 driving the suture staple 242 to move upward, causing the suture staple 242 to disengage from the staple groove 240, and the upward-moving suture staple 242 penetrates the tissue through the staple legs and abuts against the staple holder 110. The staple legs that pass through the tissue are abutted by the staple holder 110 to be bent into shape, thereby achieving suturing of the tissue. The staple cartridge assembly 200 further includes a support plate (not shown in the figure), which is mounted at the lower portion of the staple cartridge assembly 200 to limit and stop the staple pushing plate 241 to prevent the staple pushing plate 241 from moving downward and separating from the staple pushing slot 210 .

[0040] During the firing process, the nail pushing plate 300 moves distally, that is, moves toward the exposed portion 230. The distal end of the nail pushing plate 300 is lower than the proximal end, and the distal end of the nail pushing plate 300 forms a tip 330. Since the distal end of the nail pushing groove 210 passes through the exposed portion 230, when the nail pushing plate 300 moves distally, the tip 330 of the nail pushing plate 300 may pass over the distal end of the nail pushing groove 210 and be located outside the exposed portion 230. The exposed tip 330 is likely to cause damage to the tissue. To solve the above problem, Figure 7 and Figure 10As shown, the staple cartridge assembly 200 of the present disclosure further includes a blocking portion 500. When the pusher plate 300 moves distally along the length direction of the pusher groove 210, the pusher plate 300 can abut against the blocking portion 500, so that the pusher plate 300 is located at the farthest position. The farthest position refers to the limit position where the pusher plate 300 moves distally. Figure 10 and Figure 11 the pusher plate 300 in Figure 10 and Figure 11 is in the farthest position. In the farthest position, the pusher plate 300 is received at the distal end of the pusher groove 210. When the pusher plate 300 is received at the distal end of the pusher groove 210, it is completely located within the pusher groove 210, so that the tip 330 of the pusher plate 300 does not lie distally of the pusher groove 210, that is, it is not exposed outside the exposed portion 230, avoiding damage to tissues caused by the exposure of the tip 330 of the pusher plate 300.

[0041] As Figure 7 and Figure 10 shown, a plurality of pusher grooves 210 are formed. The plurality of pusher grooves 210 are arranged in the transverse direction. The transverse direction refers to the width direction of the staple cartridge assembly 200, which is perpendicular to the longitudinal direction. The pusher plate 300 includes a plurality of plate body portions 310 arranged in the transverse direction. Each plate body portion 310 corresponds to each pusher groove 210 one by one, and each plate body portion 310 is received in the corresponding pusher groove 210. When the staple cartridge assembly 200 is in the initial state, each plate body portion 310 is respectively received at the proximal end of each pusher groove 210. During firing, each plate body portion 310 slides distally along the length direction of its corresponding pusher groove 210, and the distal side of the plate body portion 310 has the above-mentioned tip 330. The pusher plate 300 further includes a shoulder 320 connected between adjacent plate body portions 310. When the pusher plate 300 is located at the farthest position, the shoulder 320 abuts against the blocking portion 500. Since the tip 330 has a relatively thin thickness, the structural strength of the tip 330 is relatively low. If the pusher plate 300 abuts against the blocking portion 500 through the tip 330 when it is in the farthest position, the tip 330 is likely to break. If the broken tip 330 remains in the human body, it will cause harm to the human body. The shoulder 320 is connected between adjacent plate body portions 310 and has a flat surface. Its structural strength is greater than that of the tip 330. The shoulder 320 with a greater structural strength abuts against the blocking portion 500 when the pusher plate 300 is in the farthest position, avoiding harm to the human body caused by damage to the pusher plate 300.

[0042] For example, as Figure 13 shown, the shoulder 320 includes a thickened shoulder 324. The thickened shoulder 324 has a greater thickness and is configured to abut against the blocking portion 500 when the pusher plate 300 is in the farthest position. The thickened shoulder 324 has a higher strength and can further prevent the pusher plate 300 from being damaged.

[0043] As Figure 6 , Figure 7 andFigure 10 As shown, the staple cartridge assembly 200 includes two side walls disposed in the transverse direction. The staple cartridge assembly 200 further includes a plurality of partition plates 220 disposed between the two side walls. The plurality of partition plates 220 extend in the longitudinal direction and are arranged in the transverse direction. The partition plate 220 is located between two adjacent staple pushing grooves 210. The blocking portion 500 is disposed on the partition plate 220 such that when the staple cartridge assembly 200 is in the initial state, the blocking portion 500 is located on the distal side of the shoulder 320 and on the movement path of the shoulder 320. Further, when the staple pushing plate 300 moves distally to the farthest position, the blocking portion 500 can stably abut against the shoulder 320. The plate body portion 310 of the staple pushing plate 300 is located in the staple pushing groove 210 such that the shoulder 320 between two adjacent plate body portions 310 faces the partition plate 220 between two adjacent staple pushing grooves 210. During the process of the staple pushing plate 300 moving distally, the shoulder 320 moves distally along the length direction of the partition plate 220.

[0044] In one embodiment of the present disclosure, the staple pushing groove 210 includes a tool path groove 211 and cam grooves 212 disposed on both sides of the tool path groove 211. For example, the cam grooves 212 include two first cam grooves 2121 and two second cam grooves 2122. The two first cam grooves 2121 are symmetrically disposed with respect to the tool path groove 211, and the two opposite second cam grooves 2122 are disposed closer to the tool path groove 211. The two second cam grooves 2122 are symmetrically disposed with respect to the tool path groove 211. In other embodiments, the number of the cam grooves 212 may also be other numbers, which are not specifically limited in the present disclosure.

[0045] As Figure 7 shown, the partition plate 220 includes two inner partition plates 221 and two outer partition plates 222. The two inner partition plates 221 are adjacent to each other, and the two inner partition plates 221 are located between the two outer partition plates 222. The two inner partition plates 221 and the two outer partition plates 222 are both symmetrically disposed with respect to the tool path groove 211.

[0046] In the present disclosure, the first cam groove 2121, the second cam groove 2122, the inner partition plate 221, and the outer partition plate 222 located on one side of the tool path groove 211 are described. The structure of the staple cartridge assembly 200 on the other side of the tool path groove 211 is the same as that on this side. As Figure 7 shown, the first cam groove 2121 is formed by the side wall of the staple cartridge assembly 200 and the outer partition plate 222, and the second cam groove 2122 is formed by the outer partition plate 222 and the inner partition plate 221.

[0047] As Figure 7 , Figure 12 and Figure 13As shown, the plate body portion 310 includes a protruding portion 311 and four cam plates 312 disposed on both sides of the protruding portion 311. The protruding portion 311 is received in the feed groove 211, and each cam plate 312 is respectively received in each cam groove 212. The shoulder portion 320 includes two inner shoulders 321 connected between adjacent protruding portions 311 and cam plates 312, and two outer shoulders 322 connected between adjacent cam plates 312. The two inner shoulders 321 are opposite to the two inner partition plates 221, and the two outer shoulders 322 are opposite to the two outer partition plates 222. When the nail pushing plate 300 moves distally along the nail pushing groove 210, the inner shoulder 321 abuts against the inner partition plate 221 and moves distally along the length direction of the inner partition plate 221, and the outer shoulder 322 abuts against the outer partition plate 222 and moves distally along the length direction of the outer partition plate 222.

[0048] In one embodiment, the blocking portion 500 is disposed on the inner partition plate 221. When the nail pushing plate 300 moves distally along the nail pushing groove 210, the blocking portion 500 is located on the movement path of the inner shoulder 321. When the blocking portion 500 abuts against the inner shoulder 321, the nail pushing plate 300 is located at the most distal position. For example, two blocking portions 500 are formed and are respectively disposed on the two inner partition plates 221 in a one-to-one correspondence. When the nail pushing plate 300 moves distally to the most distal position, the two inner shoulders 321 respectively abut against the two blocking portions 500, so that the nail pushing plate 300 can be stably stopped at the most distal position. For example, the inner shoulder 321 is a thickened shoulder 324.

[0049] In another embodiment, the blocking portion 500 is disposed on the outer partition plate 222. When the nail pushing plate 300 moves distally along the nail pushing groove 210, the blocking portion 500 is located on the movement path of the outer shoulder 322. When the blocking portion 500 abuts against the outer shoulder 322, the nail pushing plate 300 is located at the most distal position. For example, two blocking portions are formed and are respectively disposed on the two outer partition plates 222 in a one-to-one correspondence. When the nail pushing plate 300 moves distally to the most distal position, the two outer shoulders 322 respectively abut against the two blocking portions 500. For example, the outer shoulder 322 is a thickened shoulder 324.

[0050] In another embodiment, the blocking portion 500 is disposed on the inner partition plate 221 and the outer partition plate 222. When the nail pushing plate 300 moves distally to the most distal position, both the inner shoulder 321 and the outer shoulder 322 abut against the blocking portion 500. For example, four blocking portions 500 are formed, two of which are disposed on the inner partition plate 221 and the other two are disposed on the outer partition plate 222.

[0051] As Figure 10 and Figure 14As shown, the exposed portion 230 includes a first free structure 400 at its lower part. The distal end of the first free structure 400 is higher than the proximal end. The distal end of the first free structure 400 is located at the distal end of the exposed portion 230, and the proximal end of the first free structure 400 is located at the proximal end of the exposed portion 230. The first free structure 400 can free tissue when the jaw assembly 100 is in the closed state, and the first free structure 400 is used to guide the movement of the tissue to the lower side of the cartridge assembly 200. The staple pushing groove 210 is opened at the lower part of the cartridge assembly 200, and the distal end of the staple pushing groove 210 penetrates through the first free structure 400 located at the lower part of the cartridge assembly 200.

[0052] The first free structure 400 includes a first part 410 and a second part 420. The first part 410 is located above the second part 420. The blocking portion 500 is located proximal to the second part 420 and is connected to the proximal end of the second part 420. The connection of the distal end of the blocking portion 500 to the second part 420 enhances the structural strength of the blocking portion 500, enabling the blocking portion 500 to more stably block the staple pushing plate 300 and keep the staple pushing plate 300 in the farthest position.

[0053] In one embodiment, the second part 420 includes a structural rib position 430. The structural rib position 430 is located between adjacent staple pushing grooves 210. For example, the structural rib position 430 is located between the second cam groove 2122 and the feed groove 211. The structural rib position 430 extends from the first part 410 to the proximal end of the exposed portion 230. The blocking portion 500 is located proximal to the structural rib position 430 and is connected to the structural rib position, so that the blocking portion 500 is connected to the second part 420.

[0054] For example, as Figure 7 shown, the structural rib position 430 connects two inner partition plates 221, such that the structural rib position 430 is located in the middle of the exposed portion 230 in the lateral direction, and such that the blocking portion 500 can be connected to both the structural rib position 430 and the inner partition plate 221 simultaneously.

[0055] The present disclosure also provides a surgical instrument. The surgical instrument includes a jaw assembly 100. The jaw assembly 100 includes a cartridge holder 120, an anvil 110 pivotally connected to the cartridge holder 120, and the above-mentioned cartridge assembly 200. The cartridge assembly 200 is detachably mounted on the cartridge holder 120. The suturing portion 250 of the cartridge assembly 200 is received in the cartridge holder 120, and the exposed portion 230 is located outside the cartridge holder 120.

[0056] As Figures 5 to 10As shown, the surgical instrument further includes a cutting blade assembly 600 and a feed driving mechanism 700. The feed driving mechanism 700 is connected to the cutting blade assembly 600 and is configured to drive the cutting blade assembly 600 to move proximally or distally. The distal end of the cutting blade assembly 600 is connected to the staple pushing plate 300. When the jaw assembly 100 is in the initial state, the cutting blade assembly 600 is located proximally to the staple pushing plate 300 and abuts against the staple pushing plate 300. In response to the drive of the feed driving mechanism 700, the cutting blade assembly 600 moves distally, pushing the staple pushing plate 300 to move distally to fire the staple 242.

[0057] The surgical instrument includes a first state and a second state. The feed driving mechanism 700 stops working after driving the cutting blade assembly 600 to move distally by a first distance, causing the staple pushing plate 300 to stop at a preset position, and thus the surgical instrument is in the first state. When the staple pushing plate 300 is at the preset position, the distance between the distal end of the most distal staple groove 240 and the cutting blade assembly 600 in the longitudinal direction is approximately equal to 1.5 times the length of the staple groove. At this time, the most distal staple 242 in the longitudinal direction has been fired, such that the cutting distance is less than the suturing distance, where the cutting distance is the distance that the cutting blade assembly moves, and the suturing distance is the distance between the proximal end of the most proximal fired staple 242 and the distal end of the most distal fired staple. The cutting distance is less than the suturing distance to prevent the tissue incision from bleeding, and the difference between the suturing distance and the cutting distance is approximately 1.5 times the length of the staple 242 (the length of the staple groove 240). The manner in which the feed driving mechanism 700 controls the movement distance of the cutting blade assembly 600 is described below.

[0058] The preset position is located proximally to the most distal position. In response to the feed driving mechanism 700 driving the cutting blade assembly 600 and thus driving the staple pushing plate 300 to move distally along the length direction of the staple groove 210 beyond the preset position, the staple pushing plate 300 abuts against the blocking portion 500, causing the staple pushing plate 300 to be located at the most distal position, and thus the surgical instrument is in the second state. The most distal position is located distally to the preset position.

[0059] When the control of the movement distance of the cutting blade assembly 600 by the feed driving mechanism 700 fails, the cutting blade assembly 600 may continue to move distally when it reaches the preset position, resulting in the staple pushing plate 300 continuing to move distally, and it is possible that the tip 330 of the staple pushing plate 300 protrudes from the front end assembly and causes harm to the human body.

[0060] In the present disclosure, by providing a blocking portion 500 in the cartridge assembly 200, when the cutting blade assembly 600 continues to move distally from a preset position, the pusher plate 300 moves distally in the pusher groove 210, and the blocking portion 500 abuts against the pusher plate 300, causing the pusher plate 300 to stop at the most distal position, and the surgical instrument is in the second state. At this time, the pusher plate 300 is received at the distal end of the pusher groove 210, so that the tip 330 of the pusher plate 300 does not protrude outside the exposed portion 230, avoiding harm to the human body.

[0061] The first state is the normal operation of the surgical instrument, and the second state is the situation where the control of the movement distance of the cutting blade assembly 600 fails.

[0062] As Figure 15 shown, the feed drive mechanism 700 includes a motor 710, a motor gear connected to the motor 710, a large gear 730 meshing with the motor gear, a transmission gear 740 meshing with the large gear 730, and a rack 750 meshing with the transmission gear 740. The rack 750 is connected to the cutting blade assembly 600. In response to the motor 710 rotating in the first direction, the motor gear rotates in the first direction. The motor gear drives the rack 750 to move distally through the large gear 730 and the transmission gear 740, thereby driving the cutting blade assembly 600 to move distally. The cutting blade assembly 600 moves distally to cut the tissue clamped by the jaw assembly 100. At the same time, the cutting blade assembly 600 pushes the pusher plate 300 to move distally to fire the suture staple 242 to suture the tissue. When the cutting blade assembly 600 cuts to the end, in response to the user's operation, the motor 710 rotates in the second direction, the motor gear rotates in the second direction, the motor gear drives the rack 750 to move proximally through the large gear 730 and the transmission gear 740, thereby driving the cutting blade assembly 600 to move proximally. The cutting blade assembly 600 moves proximally to retract the blade. After the cutting blade assembly 600 moves to the position before feed, the retraction is completed. Then the user operates the jaw assembly 100 to open and release the clamped tissue, and then moves the jaw assembly 100 out of the human body to complete the operation.

[0063] In one embodiment, the surgical instrument includes a control module. The control module is connected to the motor 710. The control module controls the number of rotation turns of the motor 710, thereby controlling the distance that the cutting blade assembly 600 moves distally. When the motor 710 rotates a preset number of turns, the control module controls the motor 710 to stop working, causing the pusher plate 300 to stop at a preset position.

[0064] In another embodiment, the cartridge assembly 200 includes a feed stop portion (not shown in the figure). When the cartridge assembly 200 is in the initial state, the feed stop portion is located on the distal side of the cutting blade assembly 600. After the cutting blade assembly 600 moves distally until it abuts against the feed stop portion, the motor 710 stops working, causing the cutting blade assembly 600 to stop moving, thereby causing the pusher plate 300 to stop at a preset position.

[0065] It should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0066] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present disclosure, and they are not intended to limit the protection scope of the present disclosure. Any equivalent embodiments or changes made without departing from the spirit of the art of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A staple cartridge assembly, characterized in that, The cartridge assembly includes a suturing portion and an exposed portion. The suturing portion includes staple grooves arranged in a longitudinal direction, and staples are received in the staple grooves. The length of the exposed portion in the longitudinal direction is greater than or equal to 2.4 mm and less than or equal to 6 mm. The cartridge assembly further includes a pusher groove and a pusher plate. The pusher grooves penetrate through the exposed portion and the suturing portion along the longitudinal direction. When the cartridge assembly is in an initial state, the pusher plate is received at the proximal end of the pusher groove. In response to the pusher plate moving distally along the length direction of the pusher groove, the pusher plate pushes the staples out of the staple grooves. The cartridge assembly further includes a blocking portion. In response to the pusher plate moving distally along the length direction of the pusher groove, the pusher plate abuts against the blocking portion, causing the pusher plate to be located at the farthest position. At the farthest position, the pusher plate is received at the distal end of the pusher groove.

2. The staple cartridge assembly according to claim 1, wherein A plurality of pusher grooves are formed. The pusher plate includes a plurality of plate portions, and each plate portion is received in a corresponding pusher groove. When the cartridge assembly is in the initial state, each plate portion is respectively received at the proximal end of each pusher groove. The pusher plate further includes shoulders connected between adjacent plate portions. When the pusher plate is located at the farthest position, the shoulders abut against the blocking portion.

3. The staple cartridge assembly according to claim 2, wherein, The cartridge assembly includes a plurality of partitions. The partitions are located between two adjacent pusher grooves. The blocking portion is provided on the partitions. When the pusher plate moves distally along the length direction of the pusher groove, the blocking portion is located on the movement path of the shoulders.

4. The staple cartridge assembly according to claim 3, wherein, The partition includes two inner partitions and two outer partitions arranged in a transverse direction. The two inner partitions are located between the two outer partitions. The blocking portion is provided on the inner partitions and / or the outer partitions.

5. The cartridge assembly according to claim 1, wherein The exposed portion further includes a first free structure located at its lower part. The distal end of the first free structure is higher than the proximal end. The pusher groove penetrates through the first free structure.

6. The cartridge assembly according to claim 5, characterized in that, The first free structure includes a first part and a second part. The first part is located above the second part. The pusher groove penetrates through the second part. The blocking portion is located proximal to the second part and is connected to the proximal end of the second part.

7. The staple cartridge assembly according to claim 6, wherein, The second part includes a structural rib position. The blocking portion is located proximal to the structural rib position and is connected to the structural rib position.

8. A surgical instrument, characterized in that, An end effector is included, which includes a cartridge housing, an anvil pivotally connected to the cartridge housing, and the cartridge assembly according to any one of claims 1-7. The cartridge assembly is detachably mounted on the cartridge housing. When the cartridge assembly is mounted on the cartridge housing, the suturing portion is received in the cartridge housing, and the exposed portion is located outside the cartridge housing.

9. The surgical instrument according to claim 8, wherein The surgical instrument includes a first state and a second state; the surgical instrument further includes a feed drive mechanism and a cutting knife assembly connected to the feed drive mechanism, and the cutting knife assembly is connected to the staple pushing plate; when the cartridge assembly is in the initial state, in response to the drive of the feed drive mechanism, the cutting knife assembly drives the staple pushing plate to move distally and stops the staple pushing plate at a preset position, thereby causing the surgical instrument to be in the first state; In response to the feed drive mechanism driving the cutting knife assembly to further drive the staple pushing plate to move distally along the length direction of the staple pushing groove and cross the preset position, the staple pushing plate abuts against the blocking portion, causing the staple pushing plate to be located at the farthest position, thereby causing the surgical instrument to be in the second state, and the farthest position is located distally of the preset position.

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