Staple cartridge assembly, end effector and surgical stapler

Abstract

The utility model provides a staple cartridge assembly, an end effector and a surgical stapler. According to the staple cartridge assembly provided by the invention, the guide part on the supporting piece is matched with the guided part on the staple pushing piece, so that the staple pushing piece can move according to a certain track, and the staple cutting part can accurately cut off the connection between the anastomosis staple and the connecting part. Meanwhile, the movement track of the nail pushing piece cannot deflect or be unstable due to factors such as different percussion forces or interference of other external forces, it is guaranteed that the nail pushing piece moves along a fixed track, influences of other external forces are reduced, then it is guaranteed that the anastomosis nails can accurately penetrate through tissue according to a preset path, the nailing accuracy is improved, and the anastomosis effect is improved. And unnecessary damage to surrounding healthy tissues is avoided. In addition, the guide part on the supporting piece is matched with the guided part on the nail pushing piece, it can be ensured that the nail pushing piece pushes the anastomosis nail in the fixed direction, component force in other directions does not exist, and the nail pushing process is more labor-saving and smoother.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, specifically to a staple cartridge assembly, an end effector having the staple cartridge assembly, and a surgical stapler having the end effector. Background Technology

[0002] Surgical staplers are widely used in surgical procedures, primarily for suturing and connecting tissues. A surgical stapler includes an end effector, which comprises a staple cartridge assembly and an anvil. The staple cartridge assembly includes a staple pusher and a staple band, where the staple band consists of staples and a band body. During the procedure, the staple pusher in the staple cartridge assembly moves distally, pushing the staples in the staple band. With continuous pushing by the staple pusher, the staples in the staple cartridge assembly are sequentially pushed out, penetrating the tissue to be anastomosed, and shaping it with the assistance of the anvil. Simultaneously, the staple pusher severs the connection between the staples and the band body, separating the staples from the band body, thus reliably stapled the tissues together. This process is called firing.

[0003] In surgical procedures, the required firing force varies depending on the thickness of the tissue. Thinner tissue provides less resistance during firing, making it easier to penetrate. Thicker tissue, on the other hand, provides greater resistance, requiring more force to penetrate. Therefore, thinner tissue requires less firing force, while thicker tissue requires more.

[0004] However, with conventional surgical staplers, factors such as tissue thickness and external force interference can affect the ejection of the staples, the separation of the staples from the band, and the formation of the staples, especially when the tissue thickness is uneven. This can cause the trajectory of the staple pusher to deviate or become unstable during its forward movement due to variations in the firing force, resulting in tissue traction or the staples failing to be securely fixed in the intended position, leading to poor staple retention. Utility Model Content

[0005] In view of this, the present invention provides a staple cartridge assembly, an end effector having the staple cartridge assembly, and a surgical stapler having the end effector, so as to at least solve or improve the problem that the movement trajectory of the staple pusher is not stable enough during the forward movement of the staple pusher in conventional surgical staplers.

[0006] On the one hand, this disclosure provides a pinning device component.

[0007] The staple cartridge assembly includes a support, a staple band, and a staple pusher. The support has a guide portion extending in a proximal-to-distal direction. The staple band is supported by the support and includes a band body, an anastomotic staple, and a connecting portion; the band body and the anastomotic staple are connected via the connecting portion. The staple pusher includes a pusher portion, a cutter portion, and a guided portion. As the staple pusher moves relative to the support in a proximal-to-distal direction, the guided portion cooperates with the guide portion to guide the staple pusher distally along the guide portion, enabling the pusher portion to push the anastomotic staple to rotate around the connecting portion, and the cutter portion to cut off the connecting portion.

[0008] Variations in factors such as firing force and external interference can lead to instability in the pusher's trajectory. Specifically, thinner tissue provides relatively less resistance during firing, requiring less firing force to penetrate; while thicker tissue provides greater resistance, requiring more firing force to penetrate. During surgical procedures, the firing force needs to change constantly according to tissue thickness. For traditional surgical staplers, variations in firing force cause changes in the pusher's trajectory, resulting in decreased staple cutting ability and tissue traction.

[0009] According to the staple cartridge assembly provided in this disclosure, the cooperation between the guide portion on the support member and the guided portion on the staple pusher allows the staple pusher to move along a specific trajectory, and the staple cutting portion can accurately sever the connection between the staple and the connector. Simultaneously, the movement trajectory of the staple pusher will not deviate or become unstable due to differences in firing force or other external interference, ensuring that the staple pusher moves along a fixed trajectory, reducing the influence of other external forces, and thus ensuring that the staple can accurately penetrate the tissue along a predetermined path, improving the accuracy of staple insertion and avoiding unnecessary damage to surrounding healthy tissue.

[0010] In addition, the cooperation between the guide part on the support and the guided part on the pusher ensures that the pusher pushes the matching nail in a fixed direction without any force in other directions, making the nail pushing process easier and smoother.

[0011] Alternatively or supplementarily, the belt body is supported on one side in the height direction of the support member, the matching pin is located on one side in the width direction of the support member, and the guide includes a lifting part, wherein, as the pusher moves in a direction from near to far, when the guided part passes the lifting part, the cutting part is lifted in the height direction toward the side where the belt body is located and cuts off the connecting part.

[0012] When the internal structural space of the staple cartridge assembly is limited, the staple cutting section is usually flush with the connecting section in the height direction to ensure complete staple cutting. However, due to possible errors in the manufacturing and assembly process of the staple cartridge assembly, external forces acting on the staple cutting section as it moves to the distal end, or elastic deformation of the connecting section during staple forming when the staple rotates around the connecting section, the actual height of the staple cutting section may be slightly lower than that of the connecting section, resulting in incomplete staple cutting when the staple cutting section cuts through the connecting section.

[0013] To improve this problem, a lifting section can be provided on the guide section. When the guided section passes through the lifting section, the cutting section is lifted. The lifting section is designed to compensate for the height deviation between the cutting section and the connecting section caused by manufacturing or assembly errors or external forces, so that the cutting section and the connecting section are aligned in the height direction. This allows the cutting section to make more full contact with the connecting section, thereby improving the cutting capability.

[0014] Alternatively or supplementally, the guided portion and the cutting portion are substantially aligned in the direction from near to far.

[0015] The guided section and the cutting section are substantially aligned in the direction from near to far, ensuring that the height to which the guided section is raised is substantially equal to the height to which the cutting section is raised. This avoids the need for the guided section to be raised too high. Excessive raising requires more structural space, which would increase the size of the staple cartridge assembly.

[0016] Alternatively or supplementally, the connecting part and the lifting part are substantially aligned in the direction from near to far.

[0017] The connecting part and the lifting part are basically aligned in the direction from near to far, ensuring that the cutting part is lifted when the guided part passes through the lifting part, and the cutting part can contact the connecting part to achieve precise cutting.

[0018] Alternatively or supplementally, the guide portion is a guide groove provided on the support member extending in a proximal to distal direction, and the guided portion is a guided protrusion that at least partially extends into the guide groove.

[0019] The guiding part is located on the thicker supporting member, while the guided part is located on the thinner pusher member. If the groove is located on the pusher member, the structural strength of the pusher member will be significantly reduced. Considering that the pusher member is subjected to large forces during the pusher process, a pusher member with low structural strength cannot effectively perform the functions of pushing and cutting the nail, resulting in poor reliability.

[0020] Alternatively or supplementally, the guide groove also includes a transition portion connected to the lifting portion, the transition portion being a flat straight line extending from near to far, the lifting portion being a smooth arc shape that bulges upward, and the guided portion being raised into a cylindrical shape.

[0021] The lifting section has a smooth, upward-convex arc shape, while the guided section is cylindrical. This helps the guided section transition more smoothly and effortlessly from the transition section to the lifting section. At the same time, the upward-convex, smooth arc shape of the lifting section increases the overall strength of the structure.

[0022] Alternatively or supplementarily, the staple cartridge assembly also includes a staple cartridge housing, which at least partially covers the support member, staple band, and staple pusher. The upper wall of the staple cartridge housing has a staple hole for exposing the staple, the staple hole having a proximal end and a distal end opposite each other in a proximal-to-far direction. In a top-down plan view, the distance between the proximal end of the hole and the connector is D1, and the distance between the distal end of the hole and the connector is D2, wherein 0.05 ≤ D1 / D2 ≤ 0.5.

[0023] A gap should be maintained between the proximal end of the hole and the connecting part. This gap provides upward space for the cutting section during its ascent, preventing interference between the cutting section and the top wall of the staple cartridge during the lifting process. The distance between the distal end of the hole and the connecting part is D2, which helps the staple pusher to smoothly eject the staple when it rotates. The ratio of D1 to D2 should not be too small, otherwise sufficient space for the cutting section to rise will not be provided. This ratio should also not be too large, otherwise the overall size of the staple hole will be too large, and the spacing between staple holes, i.e., the spacing between staples, will be too large. This is not conducive to suture density and miniaturization of the staple cartridge assembly.

[0024] Alternatively or supplementally, the staple cartridge assembly also includes a staple cartridge housing that at least partially covers the support member, staple band, and staple pusher. The staple cartridge housing includes an upper wall portion, and the guide portion includes a transition portion that engages with the lifting portion. When the guided portion mates with the transition portion, a gap exists between the staple cutting portion and the upper wall portion.

[0025] The cartridge housing at least partially covers the support, staple band, and pusher, ensuring that the support, staple band, or pusher are not exposed and pull on the tissue before suturing. The cartridge housing acts as a protective cover. When the guided section mates with the transition section, there is a gap between the cutting section and the upper wall section to prevent the pusher from interfering with the staple wall of the cartridge housing during the rise of the pusher, making the firing process easier.

[0026] Alternatively or supplementally, the staple cartridge assembly also includes a firing element located on the proximal side of the staple pusher and abutting against it. The firing element is movable relative to the support in a proximal-to-distal direction, thereby pushing the staple pusher in a proximal-to-distal direction.

[0027] The firing mechanism and the pusher are two independent components. When passing through the lifting section, only the pusher is lifted, while the firing mechanism remains unlifted. This requires less structural space to accommodate the lifting of the pusher. Furthermore, as the firing mechanism pushes the pusher to the distal end through the lifting section, the pusher is slowly lifted via a transition section. At this point, the firing force is only needed to ensure the firing mechanism can push the pusher to the distal end; no additional firing force is required to lift the pusher, achieving a more labor-saving effect. However, when the firing mechanism and pusher are integrated into a single structure, both are lifted simultaneously when passing through the lifting section. This requires a greater firing force and a larger structural space to accommodate the lifting of the integrated firing mechanism and pusher.

[0028] Alternatively or supplementally, the firing mechanism is made of polymer material, and the pusher is made of metal material.

[0029] The firing mechanism is relatively large, allowing the use of lower-strength materials to reduce weight and cost, while its larger size ensures sufficient overall structural strength. The pusher mechanism, though smaller, directly pushes the matching pin and cuts off the connection, requiring high strength; therefore, it is made of metal. This design reduces weight and cost while still meeting firing requirements.

[0030] Alternatively or supplementally, the rivet band includes two matching studs, with the band body supported on one side of the support member in the height direction, and the two matching studs located on opposite sides of the support member in the width direction. Two independent pushers are located on opposite sides of the support member in the width direction, and the two matching studs are pushed by the same firing element.

[0031] The two anastomotic staples located on either side of the support create more even anastomotic pressure, which helps promote uniform tissue healing and improves surgical efficiency. Two independent pushers are located on opposite sides of the support in the width direction, and the two staples are propelled by the same firing mechanism, rather than by two separate firing mechanisms. This reduces the number of components in the staple cartridge assembly, lowering its structural complexity and manufacturing cost.

[0032] Alternatively or supplementally, the two anastomotic studs are staggered in a direction from near to far.

[0033] The staggered arrangement of the two anastomotic staples from proximal to distal allows for closer adhesion to the tissue, resulting in a more reliable seal, which helps promote uniform tissue healing and improves surgical efficiency. Furthermore, during firing, the staggered arrangement of the staples means that the cutting section only needs to cut one connection at a time, rather than cutting both connections simultaneously, reducing the force required for firing and making the firing process more effortless.

[0034] Alternatively or supplementally, the support, the staple band, and the staple pusher constitute a staple cartridge unit. The staple cartridge assembly includes an end fixing part and two staple cartridge units, which are fixed to the end fixing part and arranged at an angle.

[0035] On the other hand, this disclosure provides an end effector.

[0036] The end effector includes a staple cartridge assembly.

[0037] On the other hand, this disclosure provides a surgical stapler.

[0038] The surgical stapler includes an end effector. Attached Figure Description

[0039] It should be understood that the following figures only show some embodiments of the present invention and should not be regarded as a limitation on the scope.

[0040] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0041] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0042] Figure 1 This is a schematic diagram of the structure of a surgical stapler according to an embodiment of the present disclosure.

[0043] Figure 2 for Figure 1 A schematic diagram of the end effector of a surgical stapler, with the end effector in the open position.

[0044] Figure 3 for Figure 2 The diagram shows the structure of the end effector, with the end effector in the off state.

[0045] Figure 4 for Figure 2 A schematic diagram of the stud cartridge assembly of the end effector in the image.

[0046] Figure 5 for Figure 4 Exploded view of the nail chamber component.

[0047] Figure 6 for Figure 5 A schematic diagram of the staple cartridge unit in the staple cartridge component.

[0048] Figure 7 for Figure 6 Exploded view of the central nailing compartment unit.

[0049] Figure 8 for Figure 7Side view of the staple cartridge unit.

[0050] Figure 9 for Figure 7 A schematic diagram of the structure in which the pusher pin is lifted.

[0051] Figure 10 for Figure 7 A schematic diagram of the structure of the push pin located in the transition section.

[0052] Figure 11 for Figure 6 A top view of the staple cartridge unit and a close-up view of the staple holes.

[0053] Figure 12 for Figure 7 A schematic diagram of the matching staples in the staple cartridge unit. Detailed Implementation

[0054] In surgical procedures, factors such as tissue thickness and external force interference can affect the separation process of the staples and the bandage using conventional surgical staplers. This is especially true when tissue thickness is uneven; variations in the firing force during the distal movement of the staple pusher can cause deviations or instability in its trajectory, leading to tissue traction or the staple failing to securely adhere to its intended position, resulting in poor staple retention. Therefore, this disclosure provides a staple cartridge assembly, an end effector with the staple cartridge assembly, and a surgical stapler with the end effector, enabling the staple pusher to move distally along a fixed trajectory, thereby improving staple cutting capability.

[0055] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0056] <Example Surgical Anastomosing Device>

[0057] A surgical stapler 1000 according to an embodiment of the present disclosure is used in... Figure 1 The following is an example illustrating the overall structure of the surgical stapler 1000. It should be noted that the structure of the surgical stapler 1000 should not be limited to the description below. For example, one or more elements mentioned below may be omitted or replaced, and their layout relationships may be altered.

[0058] like Figure 1 As shown, the surgical stapler 1000 may include an end effector 2000, a platform 3000, and an elongated body 4000.

[0059] Platform 3000 can be held and operated by an operator (e.g., a doctor) to help control the movement of the end effector. By way of example only, platform 3000 may include handle 3100 and trigger 3200. The operator can hold handle 3100 and pull trigger 3200 to cause end effector 2000 to perform a target action.

[0060] The elongated body 4000 can extend in both proximal and distal directions. The proximal end of the elongated body 4000 can be connected to the platform 3000, and its distal end can be connected to the end effector 2000. The elongated body 4000 can extend the end effector 2000 into the target location in the body through a narrow space to perform suturing on the target tissue.

[0061] In this document, the term "proximal" is used to indicate an end, side, or part of an element (component, element, or part) that is closer to the physician; the term "distal" is used to indicate an end, side, or part of an element that is farther from the physician. In the accompanying drawings, arrow Y+ indicates the distal end in the distal-proximal direction, and arrow Y- indicates the proximal end in the distal-proximal direction.

[0062] The vertical and width directions will also be mentioned below. The near and far directions, as well as the vertical and width directions, are mutually perpendicular. For ease of understanding, the vertical direction is indicated by arrows Z+ and Z- in the accompanying diagram. Arrow Z+ indicates the upper part of the vertical direction, and arrow Z- indicates the lower part. The width direction is indicated by arrows X+ and X-. Arrow X+ indicates one side of the width direction, and arrow X- indicates the other side.

[0063] The end effector 2000 can be used to perform target actions such as closing and firing to perform processes such as clamping, suturing, and cutting target tissue. In some examples, the end effector 2000 can be detachably connected to the elongated body 4000.

[0064] <Example End Actuator>

[0065] The following example illustrates the construction of the end effector 2000.

[0066] refer to Figure 2 and Figure 3 The end effector 2000 may include a cartridge assembly 100 and an anvil assembly 200. The proximal ends of the cartridge assembly 100 and the anvil assembly 200 may be pivotally connected to form a clamp. When actuated, at least one of the cartridge assembly 100 and the anvil assembly 200 may pivot relative to at least the other, such that the clamp switches between an open state and a closed state; that is, during surgery, the anvil assembly 200 may be actuated by the platform 3000 to open or close.

[0067] The end effector 2000 in the open state Figure 2 As shown in the diagram. In the open state, the target tissue can be placed between the staple cartridge assembly 100 and the anvil assembly 200. As the operator pulls the trigger 3200, the end effector 2000... Figure 2 Switch the open state to Figure 3 The end effector 2000 switches from the open state to the closed state, thereby clamping the target tissue between the staple cartridge assembly 100 and the anvil assembly 200. The switching of the end effector 2000 from the open state to the closed state can be referred to as a closing action.

[0068] The end effector 2000 can also be driven to perform a firing action. During the firing action, the staples are ejected from the staple cartridge assembly 100 and shaped under the guidance of the anvil assembly 200, thereby suturing the target tissue located between the staple cartridge assembly 100 and the anvil assembly 200.

[0069] In some examples, the end effector 2000 can perform the closing action and the firing action simultaneously. In other examples, the end effector 2000 can perform the closing action and the firing action step by step, for example, performing the closing action first and then the firing action. This disclosure does not impose any particular limitation on this.

[0070] <Example Pinning Container Component>

[0071] The construction of the staple cartridge component 100 is illustrated below with an example.

[0072] The assembly and disassembly structures of the staple cartridge assembly 100 are as follows: Figure 4 and Figure 5 The following are shown separately. It should be noted that in... Figure 4 and Figure 5 In the image, the base of the staple cartridge component 100 is hidden.

[0073] For ease of understanding, the overall structure of the stapler assembly 100 will be described below. It should be understood that the structure of the stapler assembly 100 should not be limited to the description below. For example, one or more elements mentioned below may be omitted or replaced, and their layout relationships may be altered.

[0074] refer to Figure 4 and Figure 5 The staple cartridge assembly 100 may include an end fixing portion 10 and two staple cartridge units 20, which are detachably mounted to the end fixing portion 10. The two staple cartridge units 20 may be arranged at an angle, with the distal ends of the two staple cartridge units 20 inserted into the proximal end of the end fixing portion 10 to complete the installation of the staple cartridge units 20 onto the end fixing portion 10. In other examples, it may include only one staple cartridge unit 20, or it may include three or more staple cartridge units 20.

[0075] The staple cartridge assembly 100 may further include a firing element 30 slidably mounted on the proximal side of the staple cartridge unit 20. During surgery, the operator can operate the same firing element 30 to move from proximal to distal to fire both staple cartridge units 20 to complete the firing process. In other examples, two firing elements 30 may be included, each firing one of the two staple cartridge units 20.

[0076] The two staple cartridge units 20 can have the same or similar construction; one of them is described below.

[0077] refer to Figures 6 to 12 The staple cartridge unit 20 may include a support member 21, a staple band 22, and a staple pusher 23. The support member 21 has a guide portion 211 extending in a proximal-to-distal direction. The staple band 22 is supported by the support member 21 and includes a band body 221, a staple 222, and a connecting portion 223, with the band body 221 and the staple 222 connected via the connecting portion 223. The staple pusher 23 includes a pushing portion 231, a cutting portion 232, and a guided portion 233. As the staple pusher 23 moves relative to the support member 21 in a proximal-to-distal direction, the guided portion 233 cooperates with the guide portion 211 to guide the staple pusher 23 to move distally along the guide portion 211, such that the pushing portion 231 can push the staple 222 to rotate around the connecting portion 223, and the cutting portion 232 can cut off the connecting portion 223.

[0078] Specifically, the support member 21 provides structural support for the surgical stapler 1000, ensuring its stability during operation, especially during firing, to withstand significant mechanical forces and prevent instrument deformation or displacement. The support member 21 provides a fixed track for the pusher 23 and also serves to fix the position of the staple band 22, ensuring that the staple band 22 is accurately aligned with the pusher 23.

[0079] The staple band 22 is the carrier of the staples 222, pre-loaded with staples 222 to ensure that there are enough staples 222 available each time it is fired. The staple band 22 cooperates with the staple pusher 3 to ensure that the staples 222 remain fixed when not fired, and can be accurately and smoothly pushed out by the staple pusher 23 when fired, ensuring that the staples 222 are pushed out as needed to form a match.

[0080] The pusher 23 is the core actuating component of the surgical stapler 1000. It can move relative to the support 21 in a proximal to distal direction and is responsible for pushing the staples 222 out of the staple cartridge assembly 100 and cutting off the connection 223.

[0081] Variations in factors such as firing force and external interference can cause instability in the pusher trajectory of the pusher 23. Specifically, thinner tissue provides relatively less resistance during firing, requiring less firing force to penetrate; while thicker tissue provides greater resistance, requiring more firing force to penetrate. During surgical procedures, the firing force needs to change constantly according to the tissue thickness. For conventional surgical staplers, changes in firing force cause changes in the movement trajectory of the pusher 23, which leads to a decrease in the cutting ability of the cutting section 232 and causes tissue traction.

[0082] According to the staple cartridge assembly provided in this disclosure, the guide portion 211 on the support member 21 cooperates with the guided portion 233 on the staple pusher 23, allowing the staple pusher 23 to move along a certain trajectory. Furthermore, the staple cutter 232 accurately severs the connection between the staple 222 and the connecting portion 223. Simultaneously, the movement trajectory of the staple pusher 23 will not deviate or become unstable due to differences in firing force or other external interference, ensuring that the staple pusher 23 moves along a fixed trajectory. This reduces the influence of other external forces, thereby ensuring that the staple can accurately penetrate the tissue along a predetermined path, improving the accuracy of staple insertion and avoiding unnecessary damage to surrounding healthy tissue.

[0083] In addition, the cooperation between the guide part 211 on the support member 21 and the guided part 233 on the pusher member 23 ensures that the pusher member 23 pushes the matching nail 222 in a fixed direction without any force in other directions, making the nail pushing process easier and smoother.

[0084] refer to Figure 8 and Figure 9 The belt body 221 is supported on one side of the support member 21 in the height direction, the matching pin 222 is located on one side of the support member 21 in the width direction, and the guide part 211 includes a lifting part 212. During the process of the pusher 23 moving in the direction from near to far, when the guided part 233 passes the lifting part 212, the cutting part 232 is lifted in the height direction toward the side where the belt body 221 is located, and the connecting part 223 is cut off.

[0085] Given the limited internal space of the staple cartridge assembly 100, the staple cutting section 232 is typically flush with the connecting section 223 in the height direction to ensure complete staple cutting. However, due to potential errors in the manufacturing and assembly of the staple cartridge assembly 100, external forces acting on the staple cutting section 232 during its movement to the distal end, or elastic deformation of the connecting section 223 during the forming of the staple 222, the actual height of the staple cutting section 232 may be slightly lower than that of the connecting section 223. This can result in incomplete staple cutting when the staple cutting section 232 cuts through the connecting section 223.

[0086] To improve this issue, please continue to refer to... Figure 8 and Figure 9 A lifting section 212 can be provided on the guide section 211. When the guided section 233 passes through the lifting section 212, the cutting section 232 is lifted. The structure of the lifting section 212 can compensate for the height deviation between the cutting section 232 and the connecting section 223 caused by manufacturing or assembly errors or external forces, so that the cutting section 232 and the connecting section 223 are flush in the height direction, and the cutting section 232 can make more full contact with the connecting section 223, thereby improving the cutting ability.

[0087] Continue to refer to Figure 9 The guided part 233 and the cutting part 232 are basically aligned in the direction from near to far.

[0088] The guided portion 233 and the cutting portion 232 are substantially aligned in the direction from near to far, ensuring that the height to which the guided portion 233 is raised is substantially equal to the height to which the cutting portion 232 is raised, thus avoiding the need for the guided portion 233 to be raised too high. If the guided portion 233 is raised too high, more structural space will be required, which will increase the size of the staple cartridge assembly 100.

[0089] Continue to refer to Figure 8 The connecting part 223 and the lifting part 212 are basically aligned in the direction from near to far.

[0090] The connecting part 223 and the lifting part 212 are basically aligned in the direction from near to far, ensuring that the cutting part 232 is lifted when the guided part 233 passes through the lifting part 212, and the cutting part 232 can contact the connecting part 223 to achieve precise cutting.

[0091] Continue to refer to Figure 7 The guide portion 211 is a guide groove provided on the support member 21 that extends in a direction from near to far, and the guided portion 233 is a guided protrusion that at least partially extends into the guide groove.

[0092] The guide part 211 is provided on the thicker support member 21, and the guided part 233 is provided on the thinner pusher member 23. If the groove is provided on the pusher member 23, the structural strength of the pusher member 23 will be greatly reduced. Considering that the pusher member 23 is subjected to large forces during the pusher process, the pusher member 23 with low structural strength is difficult to realize the functions of pushing and cutting nails, and thus exhibits poor reliability.

[0093] Continue to refer to Figure 8 The guide groove also includes a transition portion 213 connected to the lifting portion 212. The transition portion 213 is a flat straight line extending from near to far, the lifting portion 212 is a smooth arc that bulges upward, and the guide portion 233 protrudes into a cylindrical shape.

[0094] The lifting portion 212 has an upwardly convex, smooth arc shape, while the guided portion 233 protrudes in a cylindrical shape. This helps the guided portion to transition more smoothly and effortlessly from the transition portion 213 to the lifting portion 212. At the same time, the upwardly convex, smooth arc shape of the lifting portion 212 can increase the overall strength of the structure.

[0095] refer to Figure 11 The staple cartridge assembly also includes a staple cartridge housing 24, which at least partially covers the support member 21, the staple band 22, and the staple pusher 23. The upper wall of the staple cartridge housing 24 has a staple hole 241 exposing the matching staple 222. The staple hole 241 has a proximal end 2411 and a distal end 2412 opposite to each other in a proximal-to-far direction. In a top-down plan view, the distance between the proximal end 2411 and the connecting portion 223 is D1, and the distance between the distal end 2412 and the connecting portion 223 is D2, where 0.05 ≤ D1 / D2 ≤ 0.5.

[0096] refer to Figure 11 A partial enlarged view of the staple hole 241 shows that a gap of size D1 should be left between the proximal end 2411 of the hole and the connecting part 223. This gap provides upward space for the staple cutting part 232 during its ascent, preventing interference between the staple cutting part 232 and the top wall of the staple cartridge shell during its lifting process. The distance D2 between the distal end 2412 of the hole and the connecting part helps the staple pusher 23 to smoothly push out the staple 222 when it rotates. The ratio of D1 to D2 should not be too small, otherwise it will not provide enough space for the staple cutting part 232 to rise. This ratio should also not be too large, otherwise the overall size of the staple hole will be too large, and the interval between staple holes 241, that is, the interval between staples 222, will be too large. This is not conducive to the suture density, nor to the miniaturization of the staple cartridge assembly 100.

[0097] refer to Figure 8 and Figure 10 The staple cartridge assembly 100 also includes a staple cartridge housing 24, which at least partially covers the support member 21, the staple band 22, and the staple pusher 23. The staple cartridge housing 24 includes an upper wall portion 242, and the guide portion 211 also includes a transition portion 213 that connects to the lifting portion 212. When the guided portion 233 engages with the transition portion 213, a gap G exists between the staple cutting portion 232 and the upper wall portion 242.

[0098] The cartridge housing 24 at least partially covers the support member 21, the staple band 22, and the staple pusher 23, ensuring that the support member 21, the staple band 22, or the staple pusher 23 are not exposed and pull on the tissue before the cartridge assembly 100 is sutured. The cartridge housing 24 acts as a protective cover. When the guided part 233 cooperates with the transition part 213, there is a gap G between the staple cutting part 232 and the upper wall part 242, which avoids contact and interference between the staple cutting part 232 and the upper wall part 242 of the cartridge housing during the raising of the staple pusher 23, making the firing process easier.

[0099] Continue to refer to Figure 5 The staple cartridge assembly 100 also includes a firing element 30, which is located on the proximal side of the staple pusher 23 and abuts against the staple pusher 23. The firing element 30 is movable relative to the support member 21 in a proximal-to-distal direction, thereby pushing the staple pusher 23 in a proximal-to-distal direction.

[0100] The firing element 30 and the pusher 23 are two independent components. When passing through the lifting section 212, only the pusher 23 is lifted, while the firing element 30 is not. This requires less structural space to accommodate the lifting of the pusher 23. Furthermore, as the firing element 30 pushes the pusher 23 towards the distal end, it is slowly lifted through the transition section 213 while passing through the lifting section 212. In this case, the firing force is only needed to ensure the firing element 30 can push the pusher 23 towards the distal end; no additional firing force is required to lift the pusher 23, achieving a more labor-saving effect. However, when the firing element 30 and the pusher 23 are integrated, both are lifted simultaneously when passing through the lifting section 212. This requires a greater firing force and more structural space to accommodate the lifting of the integrated structure.

[0101] In some examples, the firing pin 30 is made of polymer material, and the push pin 23 is made of metal material.

[0102] The firing element 30 is relatively large, allowing it to be made of a lower-strength material to reduce weight and cost, while its larger size ensures sufficient overall structural strength. The pusher element 23, though smaller, is required to directly push the matching stud 222 and the cutting connection 223, necessitating high strength; therefore, it is made of metal. This design reduces weight and cost while meeting firing requirements.

[0103] refer to Figure 7 and Figure 12 The staple band 22 includes two matching staples 222. The band body 221 is supported on one side of the support member 21 in the height direction, and the two matching staples 222 are located on opposite sides of the support member 21 in the width direction. Two independent pushers 23 are located on opposite sides of the support member in the width direction, and the two matching staples 222 are pushed by the same firing element 30.

[0104] The two anastomotic staples 222 located on both sides of the support member 21 can form a more uniform anastomotic pressure, which helps to promote uniform tissue healing and improve surgical efficiency. Two independent pushers 23 are located on opposite sides of the support member 21 in the width direction. The two anastomotic staples 222 are pushed by the same firing element 30, instead of by two separate firing elements 30. This reduces the number of components in the staple cartridge assembly, lowering the structural complexity and manufacturing cost of the staple cartridge assembly 100.

[0105] Continue to refer to Figure 12 The two anastomotic staples 222 are arranged alternately from near to far.

[0106] The two anastomotic staples 222 are staggered from proximal to distal, allowing for closer adhesion to the tissue and a more reliable seal. This promotes uniform tissue healing and improves surgical efficiency. Furthermore, during firing, the staggered arrangement of the staples 222 means that the cutting section only needs to cut one connection 223 at a time, rather than simultaneously cutting both connections 223. This reduces the force required for firing, making the firing process more effortless. In some examples, the band 221 can be composed of multiple bands 221 joined together, or multiple bands 221 can be integrated into a single structure.

[0107] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0108] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0109] The basic principles of this utility model have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this utility model are merely examples and not limitations, and should not be considered as essential features of each embodiment of this utility model. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the utility model from being implemented using the aforementioned specific details.

[0110] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A staple cartridge assembly for a surgical stapler, characterized in that, The staple cartridge component includes: A support member, the support member having a guide portion extending in a direction from near to far; A stapler tape, supported by the support member and comprising a tape body, staples, and a connecting portion, wherein the tape body and the staples are connected by the connecting portion; and A pusher, comprising a pusher portion, a cutter portion, and a guide portion; During the movement of the pusher relative to the support member in the direction from near to far, the guided part cooperates with the guide part to guide the pusher to move distally along the guide part, so that the pusher can push the staple to rotate around the connection part, and the cutter can cut off the connection part.

2. The staple cartridge assembly according to claim 1, characterized in that, The belt is supported on one side of the support member in the height direction, the staple is located on one side of the support member in the width direction, the guide includes a lifting part, wherein, during the movement of the pusher along the direction from near to far, when the guided part passes the lifting part, the staple cutting part is lifted along the height direction toward the side where the belt is located and cuts off the connecting part.

3. The staple cartridge assembly according to claim 2, characterized in that, The guided portion and the cutting portion are substantially aligned in the direction from near to far.

4. The staple cartridge assembly according to claim 2 or 3, characterized in that, The connecting portion and the lifting portion are substantially aligned in the direction from near to far.

5. The staple cartridge assembly according to claim 2, characterized in that, The guide portion is a guide groove provided on the support member extending in the proximal-to-far direction, and the guided portion is a guided protrusion that at least partially extends into the guide groove.

6. The staple cartridge assembly according to claim 5, characterized in that, The guide groove also includes a transition portion connected to the lifting portion. The transition portion is a flat straight line extending from near to far. The lifting portion is a smooth arc that bulges upward. The guided portion protrudes into a cylindrical shape.

7. The staple cartridge assembly according to claim 2, characterized in that, The staple cartridge assembly further includes a staple cartridge shell, which at least partially covers the support member, the staple band, and the staple pusher. The upper wall of the staple cartridge shell is provided with a staple hole for exposing the staple. The staple hole has a proximal end and a distal end opposite each other in the proximal-to-distal direction. In a top-down plan view, the distance between the proximal end of the hole and the connecting portion is D1, and the distance between the distal end of the hole and the connecting portion is D2, wherein 0.05 ≤ D1 / D2 ≤ 0.

5.

8. The staple cartridge assembly according to claim 2, characterized in that, The staple cartridge assembly further includes a staple cartridge shell, which at least partially covers the support member, the staple band, and the staple pusher. The staple cartridge shell includes an upper wall portion, and the guide portion further includes a transition portion that connects with the lifting portion. When the guided portion engages with the transition portion, there is a gap between the staple cutting portion and the upper wall portion.

9. The staple cartridge assembly according to claim 1, characterized in that, It also includes a firing element located on the proximal side of the pusher and abutting against the pusher, the firing element being able to move relative to the support member in the proximal-to-farward direction to push the pusher member to move in the proximal-to-farward direction.

10. The staple cartridge assembly according to claim 9, characterized in that, The firing element is made of polymer material, and the pusher is made of metal material.

11. The staple cartridge assembly according to claim 9, characterized in that, The staple band includes two staples, the band body is supported on one side of the support member in the height direction, the two staples are located on opposite sides of the support member in the width direction, two independent pushers are located on opposite sides of the support member in the width direction, and the two staples are pushed by the same firing member.

12. The staple cartridge assembly according to claim 11, characterized in that, The two anastomotic staples are arranged alternately along the direction from near to far.

13. The staple cartridge assembly according to claim 1, characterized in that, The support member, the nail band, and the nail pusher constitute a nail cartridge unit. The nail cartridge assembly includes an end fixing part and two nail cartridge units. The two nail cartridge units are fixed to the end fixing part and are arranged at an angle.

14. An end effector for use as a surgical stapler, characterized in that, The end effector includes the staple cartridge assembly according to any one of claims 1 to 13.

15. A surgical stapler, characterized in that, Includes the end effector as described in claim 14.

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