Staple cartridge assembly, end effector assembly and surgical instrument

Abstract

The utility model provides a staple cartridge assembly, an end actuator assembly with the staple cartridge assembly and a surgical instrument, which can solve the problem that the cutting performance is reduced after a cutting knife is recycled and the safety problem is caused by the exposure of the cutting knife, the staple cartridge assembly comprises a staple cartridge and a staple pushing sliding block, and the staple pushing sliding block can slide relative to the staple cartridge. The nail bin assembly further comprises a cutting knife, a knife feeding groove is formed in the nail bin, and the cutting knife can be driven by the knife pushing mechanism to move between the near end and the far end of the nail bin along the knife feeding groove. The nail pushing sliding block comprises a cutting knife containing groove, and the cutting knife can be placed in the cutting knife containing groove. When the cutter holder is not driven by the cutter pushing mechanism, the cutter is limited by the cutter holder and hidden in the cutter accommodating groove; and the cutting knife can slide along the cutting knife accommodating groove to extend out of the cutting knife accommodating groove under the driving of the knife pushing mechanism.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, and in particular to a staple cartridge assembly, an end effector assembly, and a surgical instrument. Background Technology

[0002] Anastomosing devices are commonly used in endoscopic surgery to replace traditional open surgical devices because smaller incisions often shorten postoperative recovery time and reduce complications. Therefore, a series of endoscopic surgical instruments have been developed to accurately place distal actuators through the cannula of the cannula at the desired surgical site. These distal actuators have been introduced into the tissue in several ways to achieve diagnostic or therapeutic effects.

[0003] See Figure 1 Existing staplers typically include an end effector for cutting and suturing tissue together, and a separate cutting blade assembly for cutting off excess tissue after suturing. The cutting blade is integrated into the pusher assembly, making it a single, non-removable component. This traditional stapler design presents several problems:

[0004] When the staple cartridge assembly on the end effector is not installed or during loading and unloading, the cutting blade is exposed, increasing the risk of accidental injury to the surgical personnel. Furthermore, after several uses, the cutting performance of the cutting blade device significantly decreases, leading to poor cutting results, potentially causing tissue damage or incomplete cutting, thus affecting surgical quality and patient recovery. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a staple cartridge assembly, an end effector assembly having the staple cartridge assembly, and a surgical instrument, which can solve the problems of decreased cutting performance after repeated use of the cutting blade and safety issues caused by the cutting blade being exposed.

[0006] The technical solution is as follows: a staple cartridge assembly includes a staple cartridge and a staple pusher slider, the staple pusher slider being able to slide relative to the staple cartridge, the staple cartridge assembly also includes a cutting blade, the staple cartridge being provided with a cutting groove, the cutting blade being able to move between the proximal end and the distal end of the staple cartridge along the cutting groove under the drive of the pushing blade mechanism;

[0007] The push pin slider includes:

[0008] A cutting blade receiving groove, in which the cutting blade can be placed;

[0009] When not driven by the pusher mechanism, the cutter is contained within the cutter receiving groove by the cutter holder; the cutter can slide out of the cutter receiving groove under the drive of the pusher mechanism.

[0010] Furthermore, the cutting blade holder includes an elastic element, and an elastic element guide post is provided on the cutting blade at the lower end of the blade. One end of the elastic element is fitted onto the elastic element guide post, and the other end of the elastic element can abut against the push pin slider. When not driven by the pusher mechanism, the cutting blade is restricted and hidden in the cutting blade receiving groove by the elastic force of the elastic element. Under the drive of the pusher mechanism, the cutting blade can slide along the cutting blade receiving groove to compress the elastic element and extend out of the cutting blade receiving groove.

[0011] Furthermore, the cutting blade holder includes at least one magnetic element disposed on the cutting blade receiving groove. The cutting blade is magnetic, and when not driven by the pushing mechanism, the cutting blade is attracted by the magnetic element and hidden in the cutting blade receiving groove. The cutting blade can extend out of the cutting blade receiving groove by overcoming the magnetic force of the magnetic element under the drive of the pushing mechanism.

[0012] Furthermore, the cutting blade holder includes at least two magnetic elements, which are respectively disposed on the cutting blade and the pusher slider. When not driven by the pusher mechanism, the cutting blade is attracted or repelled by the magnetic force between the magnetic elements, so that the cutting blade is hidden in the cutting blade receiving groove. Under the drive of the pusher mechanism, the cutting blade can overcome the magnetic force between the magnetic elements and extend out of the cutting blade receiving groove.

[0013] Furthermore, the magnetic component includes a first magnetic component and a second magnetic component. The first magnetic component is disposed on the side of the cutting blade with the cutting edge, and the second magnetic component is disposed on the front side of the cutting blade receiving groove. The same magnetic poles of the first magnetic component and the second magnetic component are placed opposite each other to generate a repulsive force.

[0014] Furthermore, the magnetic component includes a first magnetic component and a second magnetic component. The first magnetic component is disposed on the side of the cutting blade away from the blade edge, and the second magnetic component is disposed on the rear side of the cutting blade receiving groove. The opposite magnetic poles of the first magnetic component and the second magnetic component are placed opposite each other to generate an attractive force.

[0015] Furthermore, the cutting blade receiving groove includes an abutment portion, a blade protrusion portion, and a cutting tool receiving portion arranged sequentially from the distal end to the proximal end. The abutment portion cooperates with the front side of the cutting blade to limit the cutting blade. The blade protrusion portion allows the blade of the cutting blade to be exposed. A limiting block is provided on the upper part of the cutting tool receiving portion. The limiting block cooperates with the cutting tool receiving portion to guide and limit the cutting blade when it moves relative to the cutting blade receiving groove.

[0016] Furthermore, the cutting blade also includes a limiting step portion disposed on the rear side of the blade, and the limiting block can cooperate with the limiting step portion to limit the cutting blade.

[0017] Furthermore, the staple cartridge assembly also includes a staple cartridge base, the staple cartridge being detachably connected to the staple cartridge base, and the staple pusher slider being disposed between the staple cartridge and the staple cartridge base. When the staple pusher slider moves from the proximal end to the distal end of the staple cartridge, it pushes the suture staples in the staple cartridge to the outside of the staple cartridge. The first jaw and the second jaw are respectively provided with slides arranged along the movement direction of the cutting blade, and the pusher head is provided with sliders corresponding to the slides. When the cutting blade moves, the sliders cooperate with the slides to limit the staple cartridge assembly and the staple holder.

[0018] An end effector assembly includes a first jaw and a second jaw capable of relative movement to open and close. The first jaw includes the aforementioned staple cartridge assembly, which is also connected to a pusher mechanism. The second jaw is provided with a staple abutment.

[0019] Furthermore, the pusher mechanism includes a pusher head and a pusher rod, the pusher head and the pusher rod are detachably connected, the pusher rod can drive the pusher head to move along the cutting groove, the pusher head has a protruding top blade, the top blade can be inserted into the cutting blade receiving groove to push the cutting blade.

[0020] A surgical instrument comprising an end effector assembly as described above.

[0021] Compared with the prior art, the staple cartridge assembly, end effector assembly and surgical instruments provided by this utility model separate the cutting blade from the pusher assembly. The staple cartridge assembly with the integrated cutting blade can replace the cutting blade synchronously with the replacement of the staple cartridge assembly, ensuring that the performance of the cutting blade is optimal every time it is used, avoiding poor cutting effect due to blade wear, and improving the quality of surgery.

[0022] By integrating the cutting blade onto the staple cartridge assembly, when not driven by the pusher mechanism (e.g., during staple cartridge assembly installation or removal), the cutting blade is concealed within the staple pusher slider, preventing the blade from being exposed and significantly reducing the risk of accidental injury to surgical personnel. This ensures the cutting blade remains safe when not in use. During use, the cutting blade extends from its receiving slot under the drive of the pusher mechanism. After cutting, when not driven by the pusher mechanism, the cutting blade is again contained within the receiving slot by the cutting blade retainer. The cutting blade is always confined within the receiving slot when not driven by the pusher mechanism, ensuring the blade does not accidentally extend and become exposed, reducing the risk of misoperation and providing a safer and more reliable surgical instrument for endoscopic surgery. Attached Figure Description

[0023] Figure 1 Exploded view of an existing stapler;

[0024] Figure 2 This is an exploded view of one of the staple cartridge components in the embodiment;

[0025] Figure 3 This is an exploded view of an end effector assembly in one embodiment;

[0026] Figure 4 This is a schematic diagram of a push pin slider in one of the embodiments;

[0027] Figure 5 This is a half-sectional schematic diagram of a push pin slider in one embodiment;

[0028] Figure 6 This is a schematic diagram of a cutting blade in one of the embodiments;

[0029] Figure 7 This is a schematic diagram of a pusher head in one embodiment;

[0030] Figure 8 This is a cross-sectional view of an end effector assembly in one embodiment when the staple cartridge assembly is not fully installed;

[0031] Figure 9 This is a partial cross-sectional view of the staple cartridge assembly in the embodiment when it is not fully installed.

[0032] Figure 10 This is a partial cross-sectional view of the staple cartridge assembly after installation in the embodiment.

[0033] Figure 11 This is a partial cross-sectional view of the cutting blade continuously pushing towards the distal end in the embodiment.

[0034] Figure 12 This is a partial cross-sectional view of the tool during retraction in the embodiment;

[0035] Figure 13 This is an exploded view of the pusher slider, the cutter, and the cutter holder in one embodiment;

[0036] Figure 14 This is a side view schematic diagram of the pusher slider, the cutter, and the cutter holder in one embodiment;

[0037] Figure 15 A cross-sectional schematic diagram of the cutter holder pushing the cutter into the cutter receiving groove in another embodiment;

[0038] Figure 16 This is a cross-sectional schematic diagram showing the cutting blade extending out of the cutting blade receiving groove by the pusher head of the pusher mechanism in another embodiment;

[0039] Figure 17 A cross-sectional schematic diagram of the cutter holder pushing the cutter into the cutter receiving groove in another embodiment;

[0040] Figure 18 This is a cross-sectional schematic diagram showing the cutting blade extending out of the cutting blade receiving groove by the pusher head of the pusher mechanism in another embodiment;

[0041] Figure label:

[0042] 100. Stapled container component;

[0043] 110. Stapling device;

[0044] 120. Push pin slider;

[0045] 130. Cutting knife;

[0046] 140. Staple cartridge base;

[0047] 200. Push-cutting mechanism;

[0048] 111. Tool groove;

[0049] 121. Cutting blade receiving groove;

[0050] 121A. Abutment section;

[0051] 121B, Exposed part of the blade;

[0052] 121C. Tool receiving section;

[0053] 121D, Limit Block;

[0054] 122. Cutting blade holder;

[0055] 122A, Elastic component;

[0056] 122B, Magnetic components;

[0057] 122C1, First magnetic component;

[0058] 122C2, Second magnetic component;

[0059] 131. Blade;

[0060] 132. Elastic guide post;

[0061] 133. Limiting step section;

[0062] 210. Push head;

[0063] 211. Top blade;

[0064] 212. Slider

[0065] 220. Putter;

[0066] 300. Anchor seat;

[0067] 400. Slide. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0069] like Figures 2 to 12 As shown, in an embodiment of this utility model, a staple cartridge assembly 100 is provided, including a staple cartridge 110 and a staple pusher slider 120. The staple pusher slider 120 can slide relative to the staple cartridge 110. The staple cartridge assembly 100 also includes a cutting blade 130. The staple cartridge 110 is provided with a cutting groove 111. The cutting blade 130 can move between the proximal and distal ends of the staple cartridge 110 along the cutting groove 111 under the drive of the pushing mechanism 200.

[0070] In this embodiment, the push pin slider 120 includes:

[0071] The cutting blade receiving groove 121 allows the cutting blade 130 to be placed in the cutting blade receiving groove 121.

[0072] When not driven by the pusher mechanism 200, the cutter 130 is limited and hidden in the cutter receiving groove 121 by the cutter holder 122; the cutter 130 can slide out of the cutter receiving groove 121 under the drive of the pusher mechanism 200, so that the cutting edge 131 of the cutter 130 is exposed, so as to cut physiological tissue.

[0073] In all embodiments of this application, "distal end" refers to the end furthest from the operating body when operating a surgical instrument, and "proximal end" refers to the end closest to the operating body when operating a surgical instrument. The operating body is typically a doctor or similar personnel. When the cutting blade moves from the proximal end to the distal end, it can cut physiological tissue. When the cutting blade moves from the distal end to the proximal end, it does not cut physiological tissue; this is referred to as blade retraction.

[0074] Compared to existing technologies, in this embodiment, the cutting blade is separated from the pusher assembly and integrated with the pusher slider of the staple cartridge. The cutting blade is separated from the pusher mechanism and can be replaced when the staple cartridge assembly is replaced, avoiding the problem of reduced cutting performance caused by repeated use and improving the cutting effect. At the same time, the design of the cutting blade is also more flexible and can be customized according to surgical needs to improve the cutting effect.

[0075] After the cutting blade is integrated into the staple cartridge assembly, when the staple cartridge assembly is not installed or being removed, the cutting blade is hidden in the cutting blade receiving groove of the staple pusher slider due to the limitation of the cutting blade retainer. This avoids the sharp cutting edge being exposed and effectively reduces the risk of accidental injury to the surgical personnel. Only when in use will the cutting blade extend from the cutting blade receiving groove under the drive of the pushing mechanism. After cutting is completed, when not driven by the pushing mechanism, the cutting blade is again limited and hidden in the cutting blade receiving groove by the cutting blade retainer. Through the design of the cutting blade retainer, the cutting blade is always confined in the cutting blade receiving groove when not driven by the pushing mechanism, ensuring that the cutting blade edge is not exposed and further reducing the risk of misoperation.

[0076] Specifically, in one embodiment of this utility model, the cutting blade receiving groove 121 includes an abutment portion 121A, a blade protrusion portion 121B, and a cutting blade receiving portion 121C arranged sequentially from the distal end to the proximal end. The abutment portion 121A can cooperate with the front side of the cutting blade 130 to limit the cutting blade. The blade protrusion portion 121B is a notch on the cutting blade receiving groove 121 that allows the blade 131 of the cutting blade 130 to be exposed. A limiting block 121D is provided on the upper part of the cutting blade receiving portion 121C. The bottom edge of the cutter receiving part 121 engages with the cutter receiving part 121 to guide and limit the cutter when the cutter 130 moves relative to the cutter receiving groove 121. The engagement of the abutment part 121A, the cutter receiving part 121C, and the limiting block 121D ensures that the cutter can be accurately guided and limited during the extension process, preventing the cutter from deviating and preventing the cutter from coming out of the cutter receiving groove. It also ensures that the cutter can be accurately aligned with the tissue when it extends, improving the accuracy and consistency of cutting and reducing the risk of tissue damage.

[0077] In addition, in the embodiment, the cutting blade 130 also includes a limiting step portion 133 disposed on the rear side of the blade. The limiting block 121D can cooperate with the limiting step portion 133 to limit the cutting blade. This limiting can play the role of separating the cutting blade from the pusher assembly.

[0078] The staple cartridge assembly 100 in the embodiment typically also includes a staple cartridge base 140. The staple cartridge 110 is detachably connected to the staple cartridge base 140, thereby enabling detachable installation. A staple pusher slider 120 is disposed between the staple cartridge 110 and the staple cartridge base 140. When the pusher mechanism 200 pushes forward to push the cutter 130, the staple pusher slider 120 moves along the proximal end to the distal end of the staple cartridge 110. The staple pusher slider 120 can push the suture staples in the staple cartridge 110 to the outside of the staple cartridge, and the suture staples will be bent to firmly fix the tissue.

[0079] At the same time, the pusher mechanism 200 pushes forward to push the cutter 130. The cutter 130, integrated in the pusher slider, moves along the cutting groove 111 to cut away excess tissue, ensuring that the tissue is accurately cut after suturing and avoiding damage to surrounding healthy tissue.

[0080] In the embodiments of this utility model, various implementations of the cutting blade holder 122 are provided.

[0081] See Figures 8 to 12 In one embodiment of this utility model, the cutting blade holder 122 is an elastic element 122A. In this embodiment, the elastic element 122A is a compression spring. In other embodiments, the elastic element 122A can also be an elastic plastic part or an elastic metal sheet. An elastic element guide post 132 is provided on the cutting blade 130 at the lower end of the blade. One end of the elastic element 122A is fitted on the elastic element guide post 132, and the other end of the elastic element 122A can abut against the pusher slider 120. In this embodiment, the other end of the elastic element 122A abuts against the front side of the cutting blade receiving groove 121 of the pusher slider 120. When not driven by the pusher mechanism, the cutting blade 130 is hidden in the cutting blade receiving groove 121 by the elastic force of the elastic element 122A. Under the drive of the pusher mechanism, the cutting blade 130 can slide along the cutting blade receiving groove 121, and extend out of the cutting blade receiving groove 121, so that the blade 131 of the cutting blade 130 is exposed.

[0082] Figure 8-12 A schematic diagram illustrating the use of the outer casing device in an embodiment employing elastic element 122A is shown, as follows. Figure 8 , 9 As shown, before the staple cartridge is installed in place, the cutting blade 130 is pushed into the cutting blade receiving groove 121 of the staple pusher slider 120 by the elastic element 122A; as Figure 10 , 11 As shown, when the staple cartridge is fully installed, the cutting blade 130 is driven by the pusher mechanism, which will overcome the elastic force of the elastic element 122A and push the cutting blade 130 out of the cutting blade receiving groove 121. Figure 11As shown, as the cutting blade 130 continues to be pushed further, the cutting blade 130 is also continuously pressed against the outside of the cutting blade receiving groove 121 of the pusher slider 120; when the cutting blade 130 is pushed to the end of its stroke, as... Figure 12 As shown, when the cutting blade 130 retracts, the cutting blade 130 disengages from the pusher mechanism. At this time, the cutting blade 130 is pushed back into the cutting blade receiving groove 121 by the elastic element 122A and hidden there, so as to avoid scratching the operator's hand when the staple cartridge is taken out.

[0083] See Figure 13 , 14 In one embodiment of this utility model, the cutting blade holder 122 employs a magnetic element 122B. The magnetic element 122B can be a magnet or a magnetic alloy. The magnetic element 122B is disposed on the cutting blade receiving groove 121, specifically on the blade receiving portion 121C of the cutting blade receiving groove 121. In this embodiment, the cutting blade 130 also has magnetism after being magnetized. When not driven by the pusher mechanism, the cutting blade is attracted by the magnetic element 122B and hidden in the cutting blade receiving groove 121. Under the drive of the pusher mechanism, the cutting blade 130 can overcome the magnetic force of the magnetic element 122B and extend out of the cutting blade receiving groove 121. In embodiments similar to this embodiment, two magnetic elements 122B can also be provided, for example, respectively disposed on both sides of the blade receiving portion 121C of the cutting blade receiving groove 121. The magnetic attraction of the magnetic element 122B can quickly pull the cutting blade into the receiving groove, improving the safety of operation.

[0084] Before the staple cartridge is fully installed, the cutting blade 130 is attracted by the magnetic component 122B and enters the cutting blade receiving groove 121 of the staple pusher slider 120. When the staple cartridge is fully installed, the cutting blade 130 is driven by the pusher mechanism, which overcomes the attraction of the magnetic component 122B and pushes the cutting blade 130 out of the cutting blade receiving groove 121. As the cutting blade 130 continues to be pushed further, it is also continuously pushed against the outside of the cutting blade receiving groove 121 of the staple pusher slider 120. When the cutting blade 130 reaches the end of its stroke, it retracts and disengages from the pusher mechanism. At this time, the cutting blade 130 is attracted back into the cutting blade receiving groove 121 by the magnetic component 122B and is hidden. This prevents the operator's hand from being cut when the staple cartridge is removed.

[0085] See Figure 15 , 16In one embodiment of this utility model, the cutting blade holder 122 employs two magnetic components, which can be magnets or magnetic alloys. The magnetic components include a first magnetic component 122C1 and a second magnetic component 122C2. The first magnetic component 122C1 is disposed on the side of the cutting blade 130 with the blade 131, and the second magnetic component 122C2 is disposed on the front side of the cutting blade receiving groove 131. The opposite magnetic poles of the first magnetic component 122C1 and the second magnetic component 122C2 are placed opposite each other to generate a repulsive force. The cutting blade 130 is affected by the magnetic repulsion between the two magnetic components 122C1 and 122C2, so that the cutting blade 130 is hidden in the cutting blade receiving groove 121. Under the drive of the pushing mechanism, the cutting blade 130 can overcome the repulsive force between the magnetic components 122C1 and 122C2 and extend out of the cutting blade receiving groove 121.

[0086] Before the staple cartridge is fully installed, the cutting blade 130 is pushed into the cutting blade receiving groove 121 of the staple pusher slider 120 due to the mutual repulsion between the two first magnetic elements 122C1 and the second magnetic element 122C2. When the staple cartridge is fully installed, the cutting blade 130 is driven by the pushing mechanism, which overcomes the repulsive force between the first magnetic elements 122C1 and the second magnetic element 122C2 and pushes the cutting blade 130 out of the cutting blade receiving groove 121. As the cutting blade 130 continues to be pushed further, it is also continuously pushed against the outside of the cutting blade receiving groove 121 of the staple pusher slider 120. When the cutting blade 130 reaches the end of its stroke, it retracts and disengages from the pushing mechanism. At this time, the cutting blade 130 is once again pushed into the cutting blade receiving groove 121 and hidden due to the mutual repulsion between the two first magnetic elements 122C1 and the second magnetic element 122C2. This avoids cutting the operator's hands when the staple cartridge is removed, thus improving operational safety.

[0087] See Figure 17 , 18 In one embodiment of this utility model, the cutting blade holder 122 employs two magnetic components, which can be magnets or magnetic alloys. The magnetic components include a first magnetic component 122C1 and a second magnetic component 122C2. The first magnetic component 122C1 is disposed on the side of the cutting blade 130 away from the blade 131, and the second magnetic component 122C2 is disposed on the rear side of the cutting blade receiving groove 131. The opposite magnetic poles of the first magnetic component 122C1 and the second magnetic component 122C2 are placed opposite each other to generate an attractive force. The cutting blade 130 is affected by the magnetic attraction between the two magnetic components 122C1 and 122C2, so that the cutting blade 130 is hidden in the cutting blade receiving groove 121. Under the drive of the pushing mechanism, the cutting blade 130 can overcome the attractive force between the first magnetic component 122C1 and the second magnetic component 122C2 and extend out of the cutting blade receiving groove 121.

[0088] Before the staple cartridge is fully installed, the cutting blade 130 is attracted to the cutting blade receiving groove 121 of the staple pusher slider 120 by the mutual attraction between the two first magnetic elements 122C1 and the second magnetic element 122C2. When the staple cartridge is fully installed, the cutting blade 130 is pushed out of the cutting blade receiving groove 121 by the pusher mechanism, overcoming the attraction between the first magnetic elements 122C1 and the second magnetic element 122C2. As the cutting blade 130 continues to be pushed further, it is also continuously pushed against the outside of the cutting blade receiving groove 121 of the staple pusher slider 120. When the cutting blade 130 reaches the end of its stroke, it retracts and disengages from the pusher mechanism. At this time, the cutting blade 130 is again attracted to the cutting blade receiving groove 121 by the mutual attraction between the two first magnetic elements 122C1 and the second magnetic element 122C2 and hidden therein. When the staple cartridge is removed, this can prevent the operator's hand from being cut, thus improving the safety of the operation.

[0089] The above embodiments provide multiple implementations of the cutting blade holder, which not only improves the safety of the device, but also has strong adaptability and reliability, and can meet the needs of concealing the cutting blade.

[0090] See Figure 3 In an embodiment of this utility model, an end effector assembly is also provided. The end effector assembly includes a first jaw and a second jaw that are movably connected. The first jaw and the second jaw can move relative to each other to achieve opening and closing. The first jaw and the second jaw cooperate to enable the end effector assembly to grip the tissue to be cut well. The first jaw includes the staple cartridge assembly 100 in the above embodiment. The staple cartridge assembly 100 is also connected to the pusher mechanism 200. The second jaw is provided with a staple abutment 300. The working principle of the staple cartridge assembly 100 is as described above and will not be repeated here.

[0091] In this embodiment, the pusher mechanism 200 includes a pusher head 210 and a pusher rod 220. The pusher head 210 and the pusher rod 220 are detachably connected, and the connection method can be a snap-fit ​​connection, an interference fit, etc. When the pusher rod 220 drives the pusher head 210 to move, the two will not separate; and the pusher head 210 and the pusher rod 220 are easy to assemble and maintain, so that pusher rods or pushers of different specifications can be replaced according to actual needs. The pusher rod 220 can drive the pusher head 210 to move along the cutting groove 111. The pusher head 210 has a protruding top blade 211, which can be inserted into the cutting blade receiving groove 121 to push the cutting blade 130. The pusher head 210's top blade 211 acts on the staple cartridge assembly 100 in the above embodiment, providing driving force to the cutting blade 130 and pushing it out of the cutting blade receiving groove 121. The staple cartridge assembly of the first jaw and the staple anchor 300 of the second jaw are respectively provided with slides 400 arranged along the movement direction of the cutting blade. The pusher head 210 is provided with sliders 212 corresponding to the slides 400. When the cutting blade moves, the sliders 212 cooperate with the slides 400 to limit the staple cartridge assembly 100 and the staple anchor 300, allowing the end-effector to properly clamp the tissue to be cut. As the cutting blade 130 continues to push distally, it also pushes the staple slider 120 to move the staples in the staple cartridge 110 to the outside of the staple cartridge. After the staples are bent, they firmly fix the tissue. At the same time, the cutting blade 130 moves along the cutting groove 111, cutting away excess tissue, ensuring accurate tissue cutting after suturing and avoiding damage to surrounding healthy tissue.

[0092] In embodiments of this utility model, a surgical instrument is also provided, such as a stapler, which is a commonly used minimally invasive surgical instrument. The surgical instrument in the embodiments includes the end effector assembly or staple cartridge assembly as described above. The working principles of the staple cartridge assembly and the end effector assembly are as described above and will not be repeated here.

[0093] The above description is merely an embodiment and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solution of this utility model without departing from its scope. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model, without departing from its scope, should fall within the protection scope of this utility model.

Claims

1. A staple cartridge assembly comprising a staple cartridge (110) and a pusher sled (120) slidable relative to the staple cartridge (110), characterized in that: The staple cartridge (110) assembly further comprises a cutting knife (130), the staple cartridge (110) is provided with a knife slot (111), the cutting knife (130) can be driven by a knife pushing mechanism (200) to move along the knife slot (111) between the proximal end and the distal end of the staple cartridge (110); The pushing knife slider (120) comprises: A cutting knife accommodating groove (121), the cutting knife (130) can be placed in the cutting knife accommodating groove (121); A cutting knife retaining member (122), the cutting knife (130) is hidden in the cutting knife accommodating groove (121) and limited by the cutting knife retaining member (122) when not driven by the knife pushing mechanism (200); the cutting knife (130) can be driven by the knife pushing mechanism (200) to slide along the cutting knife accommodating groove (121) and extend out of the cutting knife accommodating groove (121).

2. The cartridge assembly of claim 1, wherein: The cutting knife retaining member (122) comprises a resilient member (122A), the cutting knife (130) is provided with a resilient member guide column (132) at the lower end of the cutting edge (131), one end of the resilient member (122A) is sleeved on the resilient member guide column (132), and the other end of the resilient member (122A) can abut against the pushing knife slider (120); the cutting knife (130) is hidden in the cutting knife accommodating groove (121) and limited by the elastic force of the resilient member (122A) when not driven by the knife pushing mechanism (200); the cutting knife (130) can be driven by the knife pushing mechanism (200) to slide along the cutting knife accommodating groove (121) and compress the resilient member (122A) to extend out of the cutting knife accommodating groove (121).

3. The cartridge assembly of claim 1, wherein: The cutting knife retaining member (122) comprises at least one magnetic member (122B), the magnetic member (122B) is arranged on the cutting knife accommodating groove (121), and the cutting knife (130) has magnetism; the cutting knife (130) is hidden in the cutting knife accommodating groove (121) and attracted by the magnetic member (122B) when not driven by the knife pushing mechanism (200); the cutting knife (130) can be driven by the knife pushing mechanism (200) to extend out of the cutting knife accommodating groove (121) by overcoming the magnetic force of the magnetic member (122B).

4. The cartridge assembly of claim 1, wherein: The cutting knife retaining member (122) comprises at least two magnetic members, the two magnetic members are arranged on the cutting knife (130) and the pushing knife slider (120) respectively; the cutting knife (130) is hidden in the cutting knife accommodating groove (121) and attracted or repelled by the magnetic force between the magnetic members when not driven by the knife pushing mechanism (200); the cutting knife (130) can be driven by the knife pushing mechanism (200) to extend out of the cutting knife accommodating groove (121) by overcoming the magnetic force between the magnetic members.

5. The cartridge assembly of claim 4, wherein: The magnetic member includes a first magnetic member (122C1) and a second magnetic member (122C2), the first magnetic member (122C1) is arranged on the side of the cutting knife (130) away from the cutting edge (131), and the second magnetic member (122C2) is arranged on the rear side of the cutting knife accommodating groove (121), and the opposite poles of the first magnetic member (122C1) and the second magnetic member (122C2) are arranged to generate an attractive force.

6. The cartridge assembly of claim 4, wherein: The magnetic member includes a first magnetic member (122C1) and a second magnetic member (122C2), the first magnetic member (122C1) is arranged on the side of the cutting knife (130) away from the cutting edge (131), and the second magnetic member (122C2) is arranged on the rear side of the cutting knife accommodating groove (121), and the opposite poles of the first magnetic member (122C1) and the second magnetic member (122C2) are arranged to generate an attractive force.

7. The cartridge assembly of claim 1, wherein: The cutting knife accommodating groove (121) includes an abutting portion (121A), a cutting edge exposure portion (121B) and a tool accommodating portion (121C) arranged in sequence from the distal end to the proximal end, the abutting portion (121A) cooperates with the front side of the cutting knife (130) to limit the cutting knife (130), the cutting edge exposure portion (121B) can expose the cutting edge (131) of the cutting knife (130), and the upper portion of the tool accommodating portion (121C) is provided with a limiting block (121D), the limiting block (121D) cooperates with the tool accommodating portion (121C) to guide and limit the cutting knife (130) when the cutting knife (130) moves relative to the cutting knife accommodating groove (121).

8. The cartridge assembly of claim 7, wherein: The cutting knife (130) further includes a limiting step portion (133) arranged on the rear side of the cutting edge (131), and the limiting block (121D) can cooperate with the limiting step portion (133) to limit the cutting knife (130).

9. An end effector assembly comprising first and second jaws movable relative to one another to effect opening and closing, characterized by: The first jaw includes the staple cartridge assembly (100) of any one of claims 1-8, the staple cartridge assembly (100) is further connected with a push knife mechanism (200), and the second jaw is provided with a staple abutting seat (300).

10. An end effector assembly as claimed in claim 9, wherein: The push knife mechanism (200) includes a push head (210) and a push rod (220), the push head (210) is detachably connected with the push rod (220), the push rod (220) can drive the push head (210) to move along the knife groove (111), the push head (210) has a protruding top knife piece (211), the top knife piece (211) can be inserted into the cutting knife accommodating groove (121) to push the cutting knife (130), and the first jaw and the second jaw are respectively provided with a sliding groove (400) arranged along the movement direction of the cutting knife (130), the push head is respectively provided with a sliding block (212) corresponding to the sliding groove, and the cutting knife (130) moves to limit the staple cartridge assembly (100) and the staple abutting seat (300) through cooperation of the sliding block (212) and the sliding groove (400).

11. A surgical instrument characterized by: An end effector assembly comprising the staple cartridge assembly (100) of any of claims 1-8 or any of claims 9-10.

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