Staple cartridge assembly and surgical instrument

Abstract

The present application provides a kind of staple cartridge assembly and surgical instrument, the staple cartridge assembly includes staple cartridge body and the pusher plate assembly installed to the staple cartridge body, the pusher plate assembly includes: pusher plate, the pusher plate is provided with knife groove, the knife groove is provided with first guide piece, and cutting knife, the cutting knife is at least partially housed in the knife groove, the cutting knife is provided with second guide piece, one of the first guide piece and the second guide piece extends in the direction perpendicular to the staple cartridge body, the first guide piece and the second guide piece are relatively movably connected, the first guide piece and the second guide piece can guide the cutting knife movement in the direction perpendicular to the staple cartridge body.

Description

Technical Field

[0001] This invention belongs to the field of medical surgical instruments, and specifically relates to a staple cartridge assembly and a surgical instrument. Background Technology

[0002] Surgical instruments can simultaneously perform anastomosis and cutting, reducing surgical time and patient bleeding, playing a crucial role in clinical surgery. The cutting blade is an indispensable component of surgical instruments. The tip of a surgical instrument includes a replaceable staple cartridge assembly, which is a disposable consumable.

[0003] To avoid wear and tear and poor cutting results caused by repeated use of the cutting blade, staple cartridge assemblies with integrated cutting blades have been developed. In this type of staple cartridge assembly, when not installed on a surgical instrument, the cutting blade is hidden inside the staple cartridge body to prevent injury to the user from the sharp edge. When installed on a surgical instrument, the cutting blade extends out of the surface of the staple cartridge body, i.e., extended, so that it can cut tissue during surgery.

[0004] The cutting blade of the existing staple cartridge assembly can slide along an inclined guide groove under the action of external force to switch between the above-mentioned hidden state and the blade-out state. The inclined guide groove results in a longer push plate, which affects the strength of the push plate and also results in a longer staple cartridge, which is not conducive to performing surgical operations in a limited space. Summary of the Invention

[0005] The present invention aims to provide a staple cartridge assembly and surgical instrument to solve the technical problem that the inclined guide groove of the cutting blade in the prior art affects the length of the staple cartridge assembly.

[0006] This invention proposes a staple cartridge assembly, the staple cartridge assembly comprising: a staple cartridge body and a staple pusher plate assembly mounted on the staple cartridge body, the staple pusher plate assembly comprising:

[0007] The nail pusher plate has a retractable groove, a first guide, and a cutting blade. The cutting blade is at least partially housed in the retractable groove and has a second guide. One of the first and second guides extends in a direction perpendicular to the nail ejection surface of the nail cartridge body. The first and second guides are movably engaged with each other and can guide the cutting blade to move in a direction perpendicular to the nail ejection surface.

[0008] Preferably, the cutting blade includes a first surface, and pushing the first surface causes the cutting blade to move upward relative to the nail pusher plate in a direction perpendicular to the nail exit surface under the guidance of the first guide and the second guide, so that the cutting edge of the cutting blade protrudes from the nail exit surface.

[0009] Preferably, after the cutting blade moves upward in a direction perpendicular to the nail-out surface, causing the cutting edge of the cutting blade to protrude beyond the nail-out surface, the first surface is contacted to keep the cutting edge of the cutting blade protruding beyond the nail-out surface.

[0010] Preferably, the first surface is a plane parallel to the nail-out surface.

[0011] Preferably, the receiving groove has an opening that exposes the first surface from the receiving groove so that it can be accessed.

[0012] Preferably, the cutting blade includes a second surface, at least a portion of which is a plane inclined relative to the nail-out surface or an arc surface inclined relative to the nail-out surface and convex outward. The second surface faces the rear and lower side of the nail-pushing plate. Pushing the second surface causes the cutting blade to move upward in a direction perpendicular to the nail-out surface under the guidance of the first guide and the second guide, so that the cutting edge of the cutting blade protrudes from the nail-out surface.

[0013] Preferably, the cutting blade further includes a first surface connected to the second surface, the first surface being located in front of the second surface; the first surface is contacted to keep the cutting edge of the cutting blade protruding from the nail-exiting surface.

[0014] Preferably, the first surface is a plane parallel to the nail-out surface.

[0015] Preferably, the cutting blade further includes a second surface, at least a portion of which is an inclined surface that is inclined relative to the nail-out surface or an arc surface that is inclined relative to the nail-out surface and protrudes outward. The second surface faces the rear and lower side of the nail-pushing plate. Pushing the second surface can cause the cutting blade to move upward in a direction perpendicular to the nail-out surface under the guidance of the first guide and the second guide, so that the cutting edge of the cutting blade protrudes from the nail-out surface. The first surface is connected to the second surface, and the first surface is located in front of the second surface.

[0016] Preferably, the blade receiving groove is provided with at least one set of first guide members, the set of first guide members including two first guide members respectively located on opposite sidewalls of the blade receiving groove, and the cutting blade is provided with at least one set of second guide members, the set of second guide members including two second guide members respectively located on opposite sides of the cutting blade, and the two first guide members of the set of first guide members are respectively engaged with the two second guide members of the set of second guide members.

[0017] Preferably, the receiving groove is provided with two sets of first guide members, which are separated in the extension direction of the nail outlet surface. The cutting blade is provided with two sets of second guide members, which are separated in the extension direction of the nail outlet surface. The first guide member in front of the two sets of first guide members is engaged with the second guide member in front of the two sets of second guide members, and the first guide member in the rear set is engaged with the second guide member in the rear set.

[0018] Preferably, the pusher plate assembly further includes an elastic body, one end of which is mounted on the pusher plate and the other end of which abuts against the cutting blade. The elastic body is used to drive the cutting blade to move downward in a direction perpendicular to the nail-out surface.

[0019] Preferably, the pusher plate assembly further includes a support plate, the cutter groove includes a receiving cavity for receiving at least a portion of the elastomer, the receiving cavity includes an opening, and the support plate is mounted on the pusher plate to at least partially close the opening.

[0020] The present invention further proposes a surgical instrument, comprising an end effector and a pusher, wherein the end effector includes a jaw assembly and a staple cartridge assembly detachably mounted to the jaw assembly, the staple cartridge assembly including a staple pusher plate and a cutting blade, characterized in that:

[0021] The pusher is used to drive the pusher plate to move forward along the length direction. The pusher includes a forward-extending lifting blade portion, which includes a third surface.

[0022] With the staple cartridge assembly installed on the jaw assembly, the lifting section is located below the cutting blade, and the third surface acts on the cutting blade from below, causing the cutting edge of the cutting blade to protrude beyond the staple ejection surface of the staple cartridge assembly.

[0023] Preferably, the third surface is a plane parallel to the nail dispensing surface of the nail cartridge assembly mounted on the jaw assembly.

[0024] Preferably, the lifting section further includes a fourth surface, which is a plane inclined relative to the staple ejection surface of the staple cartridge assembly mounted on the jaw assembly or an arc surface inclined relative to the staple ejection surface and recessed inward, the fourth surface facing the front and upper sides of the surgical instrument;

[0025] When the lifting blade moves forward, the fourth surface can contact and push the cutting blade so that it slides relative to the fourth surface, thereby causing the cutting blade to move upward in a direction perpendicular to the nail-out surface.

[0026] Preferably, the third surface and the fourth surface are connected, and the fourth surface is located in front of the third surface.

[0027] Preferably, the pusher is provided with an arm portion, the arm portion and the blade lifting portion are spaced apart, and a recess capable of accommodating the cutting blade is formed between the arm portion and the blade lifting portion.

[0028] Preferably, the front end of the arm is provided with a guide surface. When the cutting blade is received in the recess, the guide surface protrudes forward from the tip of the cutting blade, the guide surface faces the recess, and the guide surface is a slope or an arc surface.

[0029] Preferably, the arm portion is provided with a groove facing the recess, and when the cutting blade is received in the recess, the upper edge of the cutting blade is embedded in the groove.

[0030] Preferably, the staple cartridge assembly is the staple cartridge assembly described in any of the above technical solutions.

[0031] Preferably, the action includes pushing; the third surface pushes the cutting blade from below, causing the cutting blade to move in a direction perpendicular to the nail ejection surface, so that the cutting edge of the cutting blade protrudes beyond the nail ejection surface of the nail cartridge assembly.

[0032] Preferably, the action includes contact; the third surface contacts the cutting blade from below to keep the cutting edge of the cutting blade protruding from the nail-exiting surface.

[0033] By adopting the above technical solution, the cutting blade extends vertically under the guidance of the first and second guide members. During the blade extension process, the movement of the cutting blade does not utilize the space in the length direction inside the staple cartridge, making the staple cartridge assembly shorter while maintaining the same anastomosis stroke, which facilitates the implementation of surgery. Attached Figure Description

[0034] Figure 1 A schematic diagram of the anastomosis device according to an embodiment of the present invention is shown.

[0035] Figure 2 A schematic diagram of the jaw assembly of a stapler according to an embodiment of the present invention is shown.

[0036] Figure 3 A schematic diagram of the pusher plate assembly of a stapler according to an embodiment of the present invention is shown.

[0037] Figure 4 A schematic diagram of the pusher plate assembly of the anastomosis device according to an embodiment of the present invention is shown from another angle.

[0038] Figure 5 A cross-sectional view of the pusher plate assembly of an anastomosis device according to an embodiment of the present invention is shown.

[0039] Figure 6 An exploded view of the pusher plate assembly of a stapler according to an embodiment of the present invention is shown.

[0040] Figure 7 A schematic diagram of the propeller of the anastomosis device according to an embodiment of the present invention is shown.

[0041] Figure 8A A partially enlarged cross-sectional view of the actuator of the anastomosis device according to an embodiment of the present invention is shown in the starting position.

[0042] Figure 8B It shows Figure 8A A magnified view of a portion of the image.

[0043] Figure 9A A partially enlarged cross-sectional view of the anastomosis device according to an embodiment of the present invention is shown when the pusher is in a certain intermediate position.

[0044] Figure 9B It shows Figure 9A A magnified view of a portion of the image.

[0045] Figure 10A A partially enlarged cross-sectional view of the actuator's pusher during retraction, according to an embodiment of the present invention, is shown.

[0046] Figure 10B It shows Figure 10A A magnified view of a portion of the image.

[0047] Figure 11A A partially enlarged cross-sectional view of the thruster of the anastomosis device according to an embodiment of the present invention is shown when it is re-fired after retraction.

[0048] Figure 11B It shows Figure 11A A magnified view of a portion of the image.

[0049] Figure 12A This is a partially enlarged cross-sectional view showing one configuration of the staple cartridge assembly installed in the staple cartridge holder.

[0050] Figure 12B It shows Figure 12A A magnified view of a portion of the image.

[0051] Figure 13A A partially enlarged cross-sectional view shows another case of the staple cartridge assembly being installed in the staple cartridge holder.

[0052] Figure 13B It shows Figure 13A A magnified view of a portion of the image.

[0053] Figure 14 A partially enlarged view is shown of a possible staple cartridge assembly installed in the stapler.

[0054] Explanation of reference numerals in the attached figures

[0055] 100 End Actuator 101 Staple cartridge assembly

[0056] 200 sleeve assembly 300 handle assembly

[0057] 10 nail cartridge seats 20 nail abutment seats

[0058] 1. Piledriver board assembly

[0059] 11 Nail pusher plate 110 Knife retraction groove 111 Slot 112 First guide member 113 Receiving cavity 114 Force receiving part

[0060] 12 Cutting blade 121 Second guide 122 Second surface 123 First surface 1201 Blade body 1202 Retention structure

[0061] 13 Elastomer 14 Support Plate

[0062] 2. Pusher; 21. Tool holder; 22. Tool post head

[0063] 221 Lifting section 2211 Fourth surface 2212 Third surface

[0064] 222 Arm section 2221 Guide surface 2222 Groove

[0065] 223 concave portion 224 pushing portion

[0066] 3 staple cartridge body 31 staple outlet surface

[0067] A guide groove B slider

[0068] X (length direction), Y (width direction), Z (height direction). Detailed Implementation

[0069] To more clearly illustrate the above-mentioned objects, features, and advantages of the present invention, specific embodiments of the invention are described in detail in conjunction with the accompanying drawings in this section. Besides the various embodiments described in this section, the present invention can also be implemented in other different ways. Those skilled in the art can make corresponding improvements, modifications, and substitutions without departing from the spirit of the invention; therefore, the present invention is not limited to the specific embodiments disclosed in this section. The scope of protection of the present invention should be determined by the claims.

[0070] The user of the stapler is the clinician, who manipulates the stapler during surgery. The terms "proximal," "posterior," "distal," and "anterior" used in this article are relative to the clinician manipulating the stapler. "Proximal" and "posterior" refer to the portion relatively closer to the clinician, while "distal" and "anterior" refer to the portion relatively farther from the clinician. "Left" and "right" are used interchangeably. Figure 1 The positions of the staplers shown are for reference only; for example, the end effector is on the "left," and the handle assembly and shaft assembly are on the "right." The terms "upper" and "lower" refer to the relative positions of the end effector's anvil and staple cartridge seat; specifically, the anvil is on the "upper," and the staple cartridge seat is on the "lower." In the staple cartridge assembly, the staple ejection surface is on the "upper," and the side opposite to the staple ejection surface is on the "lower." When the staple cartridge assembly is installed in the staple cartridge seat, the staple ejection surface of the staple cartridge assembly faces the anvil, i.e., the staple ejection surface of the staple cartridge assembly faces "upper."

[0071] Unless otherwise specified, the length direction X represents the length direction of the stapler assembly, which is aligned with the front-to-back direction of the stapler. The width direction Y represents the width direction of the stapler assembly, which is perpendicular to the length direction. The height direction Z represents the height direction of the stapler assembly, which is aligned with the vertical direction of the stapler. The height direction Z is perpendicular to both the length direction X and the width direction Y. Specifically, as follows... Figure 2 As shown in the diagram, the height direction Z is aligned with the direction perpendicular to the nail-out surface 31.

[0072] It is important to understand that terms like "far," "near," "front," "back," "left," "right," "up," and "down" are definitions used for ease of description. However, an anastomosis device can be used in many directions and positions. Therefore, these terms expressing relative positional relationships are not restrictive or absolute.

[0073] In this invention, unless otherwise explicitly specified and limited, terms such as "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In other words, the definitions of directions in this specification are only for the convenience of explaining the technical solution of the present invention, and do not limit the direction of the electric stapler in the embodiments of the present invention in other scenarios, including but not limited to manufacturing, testing, transportation, use, etc., which may cause the orientation of the electric stapler to be reversed or its position to change.

[0075] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0076] like Figure 1 As shown, the present invention proposes a surgical instrument, preferably a stapler, which includes an end effector 100, a cannula assembly 200 and a handle assembly 300, wherein the handle assembly 300 is connected to the end effector 100 through the cannula assembly 200.

[0077] The handle assembly 300 includes a housing and a power source module. In one embodiment, the power source module is a user-operated handle connected to the transmission device described below. In another embodiment, the power source module includes a motor and a power supply module disposed within the housing. The power supply module consists of multiple electrically connected batteries for providing the motor with the electrical energy required for rotation, and the motor is connected to the transmission device described below. The type of power source module does not limit the scope of protection of this invention. The overall function of the anastomosis device is described below using an example where the power source module includes a motor and a power supply module.

[0078] The sleeve assembly 200 is disposed on the housing, and the sleeve assembly 200 includes a thruster 2 (see example...). Figures 7 to 9B The device also includes a sleeve fitted onto part of the pusher 2. The stapler further includes a transmission device connected to the output shaft of the motor, the transmission device comprising a first transmission mechanism and a second transmission mechanism. The sleeve and pusher 2 are respectively connected to the motor via the first and second transmission mechanisms to be driven to move along the length direction X, including forward or backward movement along the length direction X.

[0079] Reference Figure 1 and Figure 2 The end effector 100 includes a jaw assembly and a staple cartridge assembly 101. The jaw assembly includes a staple cartridge seat 10 and an abutment 20 pivotally connected to the staple cartridge seat 10 for operably supporting the staple cartridge assembly 101 therein. The abutment 20 is selectively movable between an open position and a closed position, switching between the open and closed states to cooperate with the staple cartridge seat 10 and the staple cartridge assembly 101 to clamp or release tissue. One end (front end) of a cannula is connected to the abutment 20, and the other end (rear end) is connected to a first drive mechanism that can drive the cannula to move backward or forward. Rearward movement of the cannula causes the abutment 20 to pivot upward to open the jaw assembly, and forward movement of the cannula causes the abutment 20 to pivot downward to close the jaw assembly.

[0080] The staple cartridge assembly 101 includes a staple cartridge body 3 and a staple pusher plate assembly 1. The staple pusher plate assembly 1 is detachably connected to the pusher 2 and is driven by the pusher 2 to perform a firing action or a retraction action. (Refer to...) Figures 3 to 7Specifically, the pusher plate assembly 1 includes a pusher plate 11 and a cutting blade 12 movably mounted on the pusher plate 11. One end (rear end) of the pusher 2 is connected to a second transmission mechanism, and the other end (front end) is detachably connected to the pusher plate 11 and the cutting blade. The portion of the pusher 2, except for the other end, is located within a sleeve. During cutting and anastomosis, the cutting blade 12 is located within the space formed between the staple cartridge seat 10 and the anvil seat 20 of the jaw assembly. The second transmission mechanism can drive the pusher 2 to move forward and backward. When the staple cartridge assembly 101 is installed, the forward movement of the pusher 2 causes the pusher plate assembly 1 to move forward, the pusher plate 11 pushes the staples of the staple cartridge assembly 101 to anastomose the tissue, and the cutting blade 12 moves forward to cut the tissue.

[0081] The motor drives the jaw assembly to close and clamp the tissue through the first transmission mechanism. Then, the motor drives the pusher plate assembly 1 forward through the second transmission mechanism to cut and anastomose the tissue. Finally, the motor drives the jaw assembly to open and release the tissue through the first transmission mechanism, thereby realizing the cutting and anastomosis functions of the stapler.

[0082] The housing of the handle assembly 300 includes a connected handle housing and a head housing. The head housing may house a transmission mechanism, and the handle housing is for the user to grip. Of course, in some embodiments, the handle housing may also house part of the transmission mechanism. In some embodiments, the handle housing may house a motor, and the head housing may house the aforementioned power module.

[0083] Specifically, such as Figure 2 As shown, the staple cartridge assembly 101 includes a staple cartridge body 3 and a staple pusher plate assembly 1. The staple cartridge assembly 101 can be replaced and installed on the staple cartridge base 10 as a consumable.

[0084] Multiple titanium nails are arranged inside the staple cartridge body 3 along its length direction X, and a sliding groove extending in the length direction X is provided inside. The pusher plate assembly 1 can move within the sliding groove. The pusher plate assembly 1 is inserted into the staple cartridge body 3 from the rear. When assembling a new staple cartridge assembly, the pusher plate assembly 1 is inserted into the staple cartridge body 3 from the rear, and a part of the pusher plate assembly 1 is placed in the sliding groove. That is, for a new, unused staple cartridge assembly 101, the pusher plate assembly 1 is located at the rear of the staple cartridge assembly 101. After the staple cartridge assembly 101 is installed in the staple cartridge seat 10, the pusher plate assembly 1 is pushed by the pusher 2 of the sleeve assembly 200. The pusher plate assembly 1 can slide along the length direction X of the staple cartridge body 3 toward the distal end of the staple cartridge body 3, thereby contacting and pushing out the titanium nails in the staple cartridge body 3. The titanium nails are pushed out, that is, the stapler performs the stapler action. Specifically, the stapler action is that the front end of the pusher plate 11 contacts and pushes out the titanium nails.

[0085] The staple cartridge assembly 101 also includes a cutting blade 12. Specifically, the staple pusher plate assembly 1 includes a cutting blade 12 movably mounted on the staple pusher plate 11. The cutting blade 12 can be selectively moved between a first position and a second position, allowing it to switch between a concealed state and an extended state. In the concealed state, the cutting blade 12 is hidden below the staple delivery surface 31 of the staple cartridge body 3, preventing accidental injury to the user from the blade. The cutting blade 12 is in the concealed state when the staple cartridge assembly 101 is not installed in the staple cartridge seat 10. In the extended state, the cutting blade 12 extends beyond the staple delivery surface 31 of the staple cartridge body 3, allowing it to cut the tissue held by the jaw assembly. The cutting blade 12 is in the extended state when the staple cartridge assembly 101 is installed in the staple cartridge seat 10 and cutting is performed. When cutting the tissue held by the jaw assembly, the staple delivery surface 31 contacts the held tissue.

[0086] When the stapler performs the anastomosis action, the cutting blade 12 is in the extended state. As the pusher plate 11 moves forward, the cutting blade 12 also slides along the length direction X of the staple cartridge body 3 toward the distal end of the staple cartridge body 3, thereby cutting the tissue, that is, the stapler performs the cutting action.

[0087] Figure 3 and Figure 10B The image shows the cutting blade 12 in its first position, i.e., in its hidden state. Figure 8A , Figure 8B , Figure 9A and Figure 9B The image shows the cutting blade 12 in the second position, i.e., the blade-out state.

[0088] like Figures 3 to 6 As shown, the pusher plate assembly 1 includes a pusher plate 11, a cutting blade 12, an elastic body 13, and a support plate 14. The pusher plate assembly 1 of this invention enables the concealment and extension of the cutting blade 12.

[0089] The pusher plate 11 is provided with a retractable groove 110 capable of accommodating at least a portion of the cutting blade 12. The retractable groove 110 is provided with a first guide member 112, and the cutting blade 12 is provided with a second guide member 121. One of the first guide member 112 and the second guide member 121 extends in a direction perpendicular to the nail outlet surface 31 of the nail cartridge body 3. The first guide member 112 and the second guide member 121 can be movably engaged with each other, and the first guide member 112 and the second guide member 121 can guide the cutting blade 12 to move in a direction perpendicular to the nail outlet surface 31.

[0090] In one specific implementation, such as Figures 3 to 6As shown, the first guide 112 can be a guide groove extending along the height direction Z of the staple cartridge assembly 101. The retraction groove 110 includes a slot 111 and a receiving cavity. The pusher plate is provided with two opposing sidewalls, and the two opposing sidewalls and the space between the two opposing sidewalls form the slot 111. The slot 111 includes the two opposing sidewalls and the space between the two sidewalls. The first guide 112 is disposed in the slot 111 of the retraction groove 110. Specifically, the first guide 112 is disposed on the sidewall of the slot 111. The second guide 121 can be a protrusion protruding from the side of the cutting blade 12. By embedding the protrusion into the guide groove, the cutting blade 12 can be at least partially received in the retraction groove 110. Guided by the guide groove, the cutting blade 12 can move between a first position and a second position along the height direction Z (perpendicular to the staple ejection surface 31) of the staple cartridge assembly 101. When the protrusion is at the bottom of the guide groove, the cutting blade 12 is in the first position, and when the protrusion is at the top of the guide groove, the cutting blade 12 is in the second position.

[0091] The slot 111 has three openings on its upper, lower, and rear sides, located on the pusher plate 11. The opening on the upper side faces upward, and the opening on the lower side faces downward. The cutting blade 12 can be inserted into the receiving slot 110 through the lower and rear sides of the pusher plate 11. The first surface 123 of the cutting blade 12 is exposed through the downward opening of the slot 111, allowing the pusher 2 to contact the cutting blade 12 through the lower opening of the slot 111 and push the cutting blade 12 upward. When the cutting blade 12 moves upward, it exits through the opening on the upper side of the slot 111. Furthermore, the opening on the rear side of the slot 111 does not obstruct the upward movement of the cutting blade 12. The sidewalls of the slot 111 are thin and elastic. When the cutting blade 12 is installed, the sidewalls of the slot 111 can elastically open to allow the second guide 121 of the cutting blade 12 (described later) to engage with the first guide 112. The cutting blade 12 includes a blade body 1201 and a retaining structure 1202. The blade body includes a cutting edge, such as... Figure 5 As shown, the blade body is partially housed within the slot 111, a portion of the retaining structure is housed within the slot 111, and the remaining retaining structure extends into and is housed within the receiving cavity 113. In another embodiment, in Figure 5 Based on the content shown, the rear end of the blade body is exposed outside the slot 111.

[0092] In other embodiments, in the hidden state, the blade body 1201 of the cutting blade 12 is fully housed in the slot 111, which does not affect the implementation of the present invention.

[0093] In other possible implementations, the first guide member can be a protrusion, and the second guide member can be a guide groove. Alternatively, the first guide member can be a slider or a slide rail, and the second guide member can be a slide rail or a slider. Those skilled in the art will understand that all implementations capable of achieving the guiding function fall within the protection scope of this invention.

[0094] Figure 14 A possible obliquely extending nail cartridge assembly is shown, wherein the cutting blade 12 is slidably mounted on the nail pusher plate 11 relative to the nail pusher plate 11, the nail pusher plate 11 being provided with a guide groove A extending forward at an oblique angle. The cutting blade 12 is provided with a slider B, which can slide along the guide groove A. When the pusher 2 moves forward (left side in the figure), the pusher 2 abuts against and pushes the cutting blade 12 from its rear end. Guided by the guide groove A, the cutting blade 12 can move obliquely upward relative to the nail pusher plate 11, causing the cutting blade 12 to extend. When the extension is complete, the cutting blade 12 has necessarily moved forward a fixed distance C relative to the nail pusher plate 11. The fixed distance C is equal to the length of the guide groove A in the front-back direction.

[0095] In one possible scenario, during the cutting process of the cutting blade 12, the pusher plate 11 can remain stationary. When the cutting process is complete, the forward displacement E of the cutting blade 12 relative to the nail cartridge seat 10 is equal to the forward distance of the cutting blade relative to the pusher plate 11, which is also the length C of the guide groove A in the front-back direction. In another possible scenario, during the cutting process of the cutting blade 12, the pusher plate 11 may also be pushed forward a distance D. When the cutting process is complete, the forward displacement E of the cutting blade 12 relative to the nail cartridge seat 10 is the length C of the guide groove A in the front-back direction plus the forward distance D of the pusher plate 11.

[0096] In short, such as Figure 14 In the inclined stapling cartridge assembly, when the cutting blade 12 completes its blade extension, it moves forward relative to the pusher plate 11 along a guide groove A for a length C in the front-back direction. The length of the pusher plate must be designed to account for this length C. The length of the stapling cartridge assembly must also account for the pusher plate, and the length of the stapler jaw assembly must also account for the stapling cartridge assembly. Therefore, both the stapling cartridge assembly and the stapler jaw assembly are designed to be relatively long. Furthermore, under normal circumstances, the pusher plate 11 moves forward, the staples are pushed out, and the cutting blade begins to cut the tissue under the pusher plate 11's influence. However, during the blade extension process, staple extension and cutting are not expected to occur; if this happens, the tissue will be incompletely cut. Therefore, to avoid incomplete tissue cutting during the pusher plate 11's forward movement a distance D, the length of the stapling cartridge assembly must also account for this distance D, resulting in both the stapling cartridge assembly and the stapler jaw assembly being designed to be even longer.

[0097] Figure 14The guide groove A and slider B of the staple cartridge assembly are equivalent to the functions of the first guide member 112 and the second guide member 121 of the present invention. The difference is that the guide groove A and slider B guide the cutting blade to tilt, while the first guide member 112 and the second guide member 121 of the present invention guide the cutting blade to move up and down. Compared with the present invention, the present invention... Figure 14 As shown in the staple cartridge assembly, during the transition of the cutting blade 12 from a concealed state to an extended state, because the first guide 112 and the second guide 121 of the present invention extend in a direction perpendicular to the staple ejection surface (height direction Z), the cutting blade 12 does not move relative to the staple cartridge seat 10 in the front-to-back direction. This front-to-back displacement is omitted, allowing the length of the push plate to be designed to be shorter. This results in a shorter staple cartridge assembly while maintaining the same anastomosis stroke, and a shorter jaw assembly, enabling the user to reach constricted areas during surgery, facilitating the manipulation of the stapler. The guide components (first guide 112 and second guide 121) of the present invention, extending only in the height direction, are the optimal design.

[0098] Compared to an inclined guide groove, a guide groove along the height direction Z allows the cutting blade to move the same distance along the height direction Z with a shorter guide groove. The pusher plate 11 has fewer hollow parts, which allows the pusher plate 11 to have higher structural strength.

[0099] like Figure 4 and Figure 5 As shown, the cutting blade 12 is provided with a first surface 123. When the staple cartridge assembly 101 is installed on the staple cartridge seat 10 of the stapler, the pusher 2 can contact the first surface 123, so that the cutting blade 12 moves upward relative to the staple pusher plate 11 in a direction perpendicular to the staple exit surface 31 (height direction Z) under the guidance of the first guide member 112 and the second guide member 121, so that the cutting edge of the cutting blade 12 can protrude from the staple exit surface 31.

[0100] Preferably, the first surface 123 is a plane parallel to the nail dispensing surface 31, and the first surface 123 is parallel to the movement direction of the nail pusher plate 11. This makes it easier for the pusher 2 to keep the cutting blade 12 stable when it is lifted by the pusher 2, preventing the cutting blade 12 from slipping into a hidden state. This eliminates the need for a separate locking structure to prevent the cutting blade from slipping, simplifying the structure of the nail cartridge assembly. It can be understood that because the first surface 123 is parallel to the nail dispensing surface 31, the pusher plate 11 will not be pushed forward when the pusher 2 abuts against the first surface 123. In other words, the pusher plate 11 will not move during the installation of the nail cartridge assembly 101 onto the nail cartridge seat 10.

[0101] The rear end of the cutter 12 (the end near the sleeve assembly 200) is provided with a second surface 122. At least a portion of the second surface 122 is a plane inclined relative to the nail-out surface or an arc surface inclined relative to the nail-out surface and convex outward. The second surface 122 faces the rear and lower side of the pusher plate 11, and extends upward as it is further back. The second surface 122 allows the lifting part 221 of the pusher 2 to be easily inserted under the cutter 12, and the movement of the pusher 2 in the front-back direction can be converted into the movement of the cutter 12 in the up-down direction by the guidance of the second surface 122.

[0102] like Figure 10A , Figure 10B , Figure 11A and Figure 11B As shown, when the stapler stops firing and retracts its blade during firing, the pusher 2 will stop advancing and retract, disengaging from the cutting blade, thus switching the cutting blade 12 from the extended state to the concealed state. When the stapler fires again, the pusher 2 moves forward again to push the cutting blade 12 and switch it from the concealed state to the extended state. The process is as follows: the pusher 2 first pushes against the second surface 122, causing the cutting blade 12 to overcome the elastic force of the elastic body 13 and move upward along the first guide member 112, so that the cutting edge of the cutting blade 12 protrudes from the staple ejection surface 31 (upper surface) of the staple cartridge body 3, thereby enabling the cutting edge to cut the tissue.

[0103] like Figure 13A and Figure 13B As shown, during the process of installing the staple cartridge assembly 101 on the staple cartridge seat 10, the second surface 122 can contact the fourth surface 2211 of the blade lifting part 221 (described later) and slide the staple cartridge assembly 101 proximally. The second surface 122 and the fourth surface 2211 can guide the cutting blade 12 to move upward along the guide groove to above the blade lifting part 221.

[0104] The second surface 122 is connected to the first surface 123, with the first surface 123 located in front of the second surface 122. The second surface 122 and the first surface 123 together form at least a portion of the bottom surface of the cutting blade 12. The connection between the second surface 122 and the first surface 123 allows them to work together. When the aforementioned stapler is retracted and then fired again, the second surface 122 causes the cutting blade 12 to lift and extend its blade, while the first surface 123 keeps the cutting blade 12 stably in the extended state. The cooperation between the two ensures that the cutting blade 12 extends and remains in the extended state continuously.

[0105] Comparison Figure 3 and Figure 6The cutter groove 110 is provided with two sets of first guide members 112. Here, the two first guide members 112 located on the two side walls of the slot 111 and facing each other in the width direction Y can be referred to as a set of first guide members 112. The two sets of first guide members 112 can be spaced apart in the length direction X, so as to reliably guide the movement of the cutting blade 12. The two sets of first guide members 112 can prevent the cutting blade 12 from flipping in the cutter groove 110.

[0106] Each group of first guide members 112 has two first guide members 112, which are located on two opposite sidewalls of the slot 111, that is, one first guide member 112 is located on one sidewall of the slot 111, and the other first guide member 112 is located on the other sidewall opposite to the aforementioned one sidewall.

[0107] The cutting blade 12 has two sets of first guide members 112 and two sets of second guide members 121. The two sets of second guide members are separated in the extension direction of the nail-out surface. The front set of first guide members mates with the front set of second guide members, and the rear set of first guide members mates with the rear set of second guide members. Each set of second guide members 121 has two second guide members 121, located on two opposite sides of the cutting blade 12. That is, one second guide member 121 is located on one side wall of the cutting blade 12, and the other second guide member 121 is located on the opposite side wall. Each first guide member 112 mates with one second guide member 121. In other words, the two first guide members 112 of one set of first guide members are movably and correspondingly engaged with the two second guide members 121 of one set of second guide members. Guiding the cutting blade 12 from both sides can prevent the cutting blade 12 from tilting left and right in the receiving groove 110, so that the cutting blade 12 remains stable during its movement along the height direction Z.

[0108] Furthermore, the second guide member 121 can be a protrusion with a square cross-section. Such a protrusion is difficult to rotate within the guide groove, which can prevent the cutting blade 12 from flipping within the receiving groove 110. The square shape includes squares, rounded squares, rectangles, and rounded rectangles, etc.

[0109] In other embodiments, only one set of first guide members 112 may be provided. The shape and structure of the first guide member 112 and / or the second guide member 121 can be used to prevent the cutting blade 12 from flipping in the blade receiving groove 110. For example, the shape of the protrusion that serves as the second guide member 121 is square, or the second guide member includes a locking structure for locking the positional relationship between the first guide member 112 and the second guide member 121.

[0110] Reference Figure 5The cutter recess 110 includes a receiving cavity 113 that houses at least a portion of the elastomer. The elastomer 13 allows the cutter 12 to move downwards in a direction perpendicular to the nail exit surface 31. The receiving cavity 113 includes an opening, for example, facing downwards, and a support plate 14 is mounted on the nail pusher plate 11 to at least partially close the opening, preventing shredded human tissue from entering from the bottom of the receiving cavity 113 and ensuring unimpeded movement of the elastomer 13. The support plate 14 can be securely connected to the nail pusher plate 11 by plastic heat fusion. The support plate 14 is located below the elastomer 13 and can, but does not necessarily, support the elastomer 13.

[0111] The width of the receiving cavity 113 is the same as the width of the elastic body 13, allowing the receiving cavity 113 to restrict the range of motion of the elastic body 13 along the width direction Y. The receiving cavity 113 communicates with the slot 111, and the remaining part of the holding mechanism of the cutting blade 12 can extend into the receiving cavity 113, while the movable end of the elastic body 13 can extend into the slot 111. One end of the elastic body 13 is mounted on the pusher plate 11, and the other end (movable end) of the elastic body 13 presses against the holding mechanism of the cutting blade 12, causing the cutting blade 12 to tend to be housed in the blade return slot 110, i.e., the cutting blade 12 is in the first position. The elastic body 13 can be an irregularly shaped spring. Figure 5 As shown, the movable end of the elastic body 13 extends into the slot 111 and presses against the holding mechanism of the cutting blade 12. It should be noted that the positions of the movable end of the elastic body 13 and the holding mechanism of the cutting blade 12 within the retraction groove 110 do not limit the scope of the present invention, as long as both are located within the retraction groove 110 and the movable end of the elastic body 13 presses against the holding mechanism of the cutting blade 12. For example, both the movable end of the elastic body 13 and the holding mechanism of the cutting blade 12 are within the receiving cavity 113.

[0112] The elastomer 13 can be inserted into the receiving cavity 113 through the bottom opening of the receiving cavity 113 first, then the cutting blade 12 can be inserted into the slot 111, and finally the support plate 14 can be installed after the cutting blade 12 and the elastomer 13 are installed, and the support plate 14 can be installed on the pusher plate 11.

[0113] like Figure 3 and Figure 6 As shown, the pusher plate 11 is provided with a force-receiving part 114 for being pushed by the pusher 2. The pusher 2 can drive the pusher plate 11 to move forward by pushing the force-receiving part 114.

[0114] like Figure 7As shown, the sleeve assembly 200 includes a pusher 2, which includes a blade shank 21 and a blade holder head 22. The blade holder head 22 is connected to the front end of the blade shank 21, and the rear end of the blade shank 21 is connected to a second transmission mechanism. When the staple cartridge assembly 101 is installed on the staple cartridge seat 10 and the pusher 2 moves forward along the length direction X, the blade holder head 22 can push the staple pusher plate 11 forward. The blade holder head 22 also contacts and engages with the cutting blade 12, causing the cutting blade 12 to be lifted up. The cutting edge of the cutting blade 12 protrudes from the staple outlet surface 31 of the staple cartridge body 3.

[0115] The knife holder head 22 is provided with a pushing part 224. When the pusher 2 moves forward, the pushing part 224 contacts and pushes the force-receiving part 114, thereby driving the pusher plate 11 to move forward.

[0116] The blade holder head 22 is also provided with a blade lifting section 221 and an arm section 222, which extend forward and protrude. The blade lifting section 221 and the arm section 222 are spaced apart, and a recess 223 is formed between them to accommodate the cutting blade 12. The cutting blade 12 can be clamped between the blade lifting section 221 and the arm section 222. With the cutting blade 12 accommodated in the recess 223, the blade lifting section 221 is located below the cutting blade 12, and the arm section 222 is located above the cutting blade 12. The cutting blade 12 does not need to contact the bottom surface of the recess 223.

[0117] The lifting section 221 is provided with a third surface 2212, which contacts the first surface 123 (bottom surface) of the cutting blade 12, keeping the cutting blade 12 in a lifted state. Preferably, with the staple cartridge assembly 101 installed in the staple cartridge seat 10, the third surface 2212 is parallel to the staple dispensing surface 31, parallel to the first surface 123 of the cutting blade 12, and parallel to the direction of movement (front-back direction) of the pusher plate 11. When the cutting blade 12 is in the extended state and the pusher 2 is stationary, the lifting section 221 contacts the cutting blade 12, and the lifting section 221 does not apply an external force along the length direction X to the cutting blade 12, thus keeping the cutting blade 12 stationary. This makes it easier to maintain stability of the cutting blade 12 when it is lifted by the pusher 2, preventing the cutting blade 12 from slipping into a hidden state, eliminating the need for a separate locking structure to prevent the cutting blade from slipping, and simplifying the structure of the staple cartridge assembly.

[0118] The front end of the lifting section 221 is provided with a fourth surface 2211. The fourth surface 2211 is either a plane inclined relative to the staple dispensing surface (31) of the staple cartridge assembly (101) mounted on the jaw assembly, or an arc surface inclined relative to the staple dispensing surface (31) and concave inward. The fourth surface 2211 faces the front and upper side of the stapler, and extends upward as it is further back. When the staple cartridge assembly 101 is mounted on the staple cartridge seat 10, the fourth surface 2211 and the second surface 122 can be parallel, thereby increasing the contact area and reducing wear when the second surface 122 and the fourth surface 2211 mate.

[0119] like Figures 10A to 11B As shown, when the pusher 2 pushes the cutting blade 12 forward to extend its edge, the fourth surface 2211 and the second surface 122 come into contact. As the lifting part 221 moves forward, the second surface 122 and the fourth surface 2211 gradually shift apart, causing the cutting blade 12 to overcome the elastic force of the elastic body 13 and move upward along the first guide member 112. The cutting blade 12 is then housed in the recess 223, causing the cutting edge of the cutting blade 12 to protrude from the nail ejection surface 31 of the nail cartridge body 3.

[0120] In other possible implementations, only the cutting blade 12 may be provided with an inclined second surface 122, or only the front end of the lifting portion 221 may be provided with an inclined fourth surface 2211. When the lifting portion 221 moves forward, the second or fourth surface may cause the lifting portion 221 to push the cutting blade 12 upward. Preferably, the front end of the lifting portion 221 or another of the cutting blades 12 may be provided with a rounded corner that matches the inclined surface.

[0121] like Figure 8B and Figure 9B As shown, with the cutting blade 12 housed in the recess 223, the front end of the arm portion 222 protrudes forward beyond the tip of the cutting blade 12. A guide surface 2221 is formed at the front end of the arm portion 222, facing the recess 223. The guide surface 2221 can be a bevel or an arc surface. When the blade holder head 22 pushes the cutting blade 12 forward, the guide surface 2221 contacts the tissue before the cutting blade 12, thereby guiding the tissue toward the cutting edge of the cutting blade 12, making the tissue easier to cut by the cutting blade 12. The tip of the cutting blade 12 can be the tip of the cutting edge of the cutting blade 12, or the tip of the cutting blade 12 can be the front end of the exposed portion of the cutting blade 12. In some possible embodiments, the tip of the cutting blade 12 may or may not be the tip of the cutting edge.

[0122] Reference Figures 7 to 9BThe arm portion 222 is provided with a groove 2222, which faces the recess 223. The groove 2222 extends approximately along the length direction X. The groove 2222 can be located in the middle of the arm portion 222, and the surface of the sidewall of the groove 2222 facing the recess 223 is defined as a guide surface 2221. When the cutting blade 12 is accommodated in the recess 223, the upper edge of the cutting blade 12 can be embedded in the groove 2222. In this way, no gap is formed between the cutting blade 12 and the arm portion 222 in the height direction, preventing tissue from entering the gap between the cutting blade 12 and the arm portion 222 and not being cut. This ensures that all tissue can be cut by the cutting blade 12, resulting in a better cutting effect.

[0123] Before the stapler makes its first cut and reaches the tissue, the cutting blade needs to be switched from a concealed state to an extended state. In this invention, through the aforementioned blade-lifting structure, the surgeon can achieve full blade extension simply by performing the installation action, without needing to activate the stapler to begin firing. Specifically, when the staple cartridge assembly of this invention is installed at an angle onto the jaw assembly, the following two scenarios may occur:

[0124] Scenario 1: For example Figure 12A and Figure 12B As shown, when installing the staple cartridge assembly 101, the distal end of the staple cartridge assembly 101 tilts upwards at an angle, and the proximal end first extends into the proximal end of the jaw assembly. The cutting blade 12 at the proximal end is partially received in the recess 223 of the pusher 2. At this time, the first surface 123 of the cutting blade abuts against the third surface 2212 of the lifting part. The installation action causes the first surface 123 of the cutting blade to be subjected to an upward lifting force, thereby causing the cutting blade 12 to be lifted by the lifting part 221 and extend. Finally, the cutting blade 12 is raised to the second position. Then, as the staple cartridge assembly 101 continues to slide into the proximal end of the jaw assembly, the third surface 2212 and the first surface 123 of the cutting blade 12 slide relative to each other until the cutting blade 12 is embedded in the recess 223. Finally, the distal end of the staple cartridge assembly 101 is pressed down. When pressed to the bottom, the third surface 2212 stably holds the cutting blade in the second position, that is, the staple cartridge assembly 101 is installed in the staple cartridge seat 10.

[0125] Scenario 2: For example Figure 13A and Figure 13BAs described, when installing the staple cartridge assembly 101, the distal end of the staple cartridge assembly 101 is tilted upwards, forming an inclined angle, and the proximal end first extends into the proximal end of the jaw assembly. However, the cutting blade 12 is not directly embedded in the recess 223 of the pusher 2, but is located in front of the lifting section or abuts against the fourth surface 221 of the lifting section 221. The doctor operates the staple cartridge assembly to continue sliding towards the proximal end of the jaw assembly. At this time, the second surface 122 of the cutting blade 12 at the proximal end of the staple cartridge assembly 101 abuts against the fourth surface 2211 of the lifting section 221. Then the contact surface becomes smaller and gradually shifts away, eventually separating. During this process, under the guidance of these two surfaces, the cutting blade 12 can be lifted by the lifting section 221 to extend its blade, and finally the cutting blade 12 is raised to the second position. When the above separation occurs, the cutting blade 12 enters the recess 223 of the lifting section, as... Figure 12A and Figure 12B As shown, the third surface 2212 of the lifting section abuts against the first surface 123 of the cutting blade 12, holding the cutting blade in the second position. As the staple cartridge assembly 101 continues to slide into the proximal end of the jaw assembly, the third surface 2212 and the first surface 123 of the cutting blade 12 slide relative to each other until the cutting blade 12 is embedded in the recess 223. Finally, the distal end of the staple cartridge assembly 101 is pressed down. When pressed to the bottom, the third surface 2212 stably holds the cutting blade in the second position, that is, the staple cartridge assembly 101 is installed in the staple cartridge seat 10. Guided by the second surface 122 and the fourth surface 2211, the staple cartridge assembly 101 is installed in the predetermined position, making it difficult to install incorrectly.

[0126] In both installation methods described above, with the blade holder head 22 in the initial position, the cutting blade 12 is lifted by the blade lifting part 221, causing the cutting edge of the cutting blade 12 to protrude beyond the staple ejection surface 31 of the staple cartridge body 3, thus completing the blade ejection. Both installation methods can prevent the staple cartridge assembly 101 from shifting its installation position, thereby avoiding damage to the staple pusher plate when the jaws close and reducing surgical risks.

[0127] In the above installation method, it can be seen that when the staple cartridge assembly is installed on the jaw assembly, the lifting part is located below the cutting blade, and the third surface acts on the cutting blade from below, causing the cutting edge of the cutting blade to protrude from the staple ejection surface of the staple cartridge assembly. This action includes pushing; the third surface pushes the cutting blade from below, causing the cutting blade to move in a direction perpendicular to the staple ejection surface, so that the cutting edge of the cutting blade protrudes from the staple ejection surface of the staple cartridge assembly. The action also includes contact; the third surface contacts the cutting blade from below to keep the cutting edge of the cutting blade protruding from the staple ejection surface.

[0128] refer to Figures 8A to 11B This describes the working process of the pusher 2 pushing the pusher plate assembly 1 when the staple cartridge assembly 101 is installed in the staple cartridge seat 10.

[0129] like Figure 8A and Figure 8B As shown, the staple cartridge assembly 101 is installed on the staple cartridge base 10, the staple pusher plate assembly 1 is located at the rear end of the staple cartridge assembly 101 in the initial position, and the cutting blade 12 is lifted by the blade lifting part 221 and extends.

[0130] like Figure 9A and Figure 9B As shown, the blade holder head 22 moves forward from the starting position to a certain position in the middle of the staple cartridge body 3. During this process, the lifting part 221 keeps the cutting blade 12 raised, and the blade holder head 22 pushes the pusher plate 11 and the cutting blade 12 forward. The pusher plate 11 pushes the staples out of the stapled tissue, and the cutting edge of the cutting blade 12 can cut the tissue.

[0131] like Figure 10A and Figure 10B As shown, when firing stops and the blade retracts, the blade holder head 22 retracts a certain distance from a certain position in the middle, separating the blade holder head 22 from the nail pusher plate assembly 1. Since the cutting blade 12 is limited by the first guide member 112, the lifting part 221 also separates from the cutting blade 12. As the lifting part 221 below the cutting blade 12 retracts, the cutting blade 12 moves downward under the elastic force of the elastic body 13, and the cutting edge of the cutting blade 12 is lower than the nail outlet surface 31 of the nail cartridge body 3 and is in a hidden state. During the retraction of the blade holder head 22, the position of the cutting blade 12 along the length direction X remains unchanged, avoiding the problem of the cutting blade 12 getting stuck that may occur if the cutting blade 12 retracts with the blade holder head 22.

[0132] like Figure 11A and Figure 11B As shown, when the blade holder head 22 moves forward again after the blade is retracted, the fourth surface 2211 of the lifting part 221 first contacts the second surface 122 of the cutting blade 12. As the lifting part 221 moves forward, the contact area between the second surface 122 and the fourth surface 2211 becomes smaller and gradually shifts away, causing the cutting blade 12 to overcome the elastic force of the elastic body 13 and move upward along the first guide member 112. When the second surface 122 and the fourth surface 2211 are completely shifted away, the third surface 2212 of the lifting part 221 abuts against the first surface 123 of the cutting blade 12, keeping the cutting blade 12 raised. The third surface 2212 and the first surface 123 of the cutting blade 12 slide relative to each other until the cutting blade 12 is embedded in the recess 223, causing the cutting edge of the cutting blade 12 to protrude from the staple ejection surface 31 of the staple cartridge body 3, allowing the cutting blade 12 to cut tissue.

[0133] The surgical instruments of this invention can simultaneously perform anastomosis and cutting. These instruments include, but are not limited to, staplers, suturing devices, and surgical robots, wherein the staplers, suturing devices, and surgical robots all have end effectors and thrusters. Although this invention uses a stapler as an example to specifically describe the surgical instruments, the surgical instruments of this invention are not limited to staplers.

[0134] Although the present invention has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be modified and implemented as alternative embodiments without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning for the present invention.

Claims

1. A staple cartridge assembly, characterized in that, The staple cartridge assembly (101) includes a staple cartridge body (3) and a staple pusher plate assembly (1) installed on the staple cartridge body (3), the staple pusher plate assembly (1) including: A nail pusher plate (11), wherein the nail pusher plate (11) is provided with a knife-receiving groove (110), wherein the knife-receiving groove (110) is provided with a first guide member (112), and A cutting blade (12) is at least partially housed in the receiving groove (110), and the cutting blade (12) is provided with a second guide (121). One of the first guide (112) and the second guide (121) extends in a direction perpendicular to the nail ejection surface (31) of the staple cartridge body (3). The first guide (112) and the second guide (121) are movably coupled to each other. The first guide (112) and the second guide (121) can guide the cutting blade (12) to move in a direction perpendicular to the nail ejection surface (31). When the cutting edge of the cutting blade (12) protrudes from the nail ejection surface (31), in response to the forward movement of the nail pusher plate (11), the cutting blade (12) slides along the length direction of the staple cartridge body (3) toward the distal end of the staple cartridge body (3), thereby cutting the tissue.

2. The staple cartridge assembly according to claim 1, characterized in that, The cutting blade (12) includes a first surface (123). Pushing the first surface (123) causes the cutting blade (12) to move upward relative to the nail pusher plate (11) in a direction perpendicular to the nail exit surface (31) under the guidance of the first guide (112) and the second guide (121), so that the cutting edge of the cutting blade (12) protrudes from the nail exit surface (31).

3. The staple cartridge assembly according to claim 2, characterized in that, After the cutting blade (12) moves upward in a direction perpendicular to the nail-out surface (31) so that the cutting edge of the cutting blade (12) protrudes from the nail-out surface (31), the first surface (123) is contacted to keep the cutting edge of the cutting blade (12) protruding from the nail-out surface (31).

4. The staple cartridge assembly according to any one of claims 2 and 3, characterized in that, The first surface (123) is a plane parallel to the nail-out surface (31).

5. The staple cartridge assembly according to claim 2, characterized in that, The receiving groove (110) is provided with an opening that exposes the first surface (123) from the receiving groove (110) so that it can be accessed.

6. The staple cartridge assembly according to claim 1, characterized in that, The cutting blade (12) includes a second surface (122), at least a portion of which is a plane inclined relative to the nail-out surface (31) or an arc surface inclined relative to the nail-out surface (31) and protruding outward. The second surface (122) faces the rear and lower side of the nail-pushing plate (11). Pushing the second surface (122) causes the cutting blade (12) to move upward in a direction perpendicular to the nail-out surface (31) under the guidance of the first guide (112) and the second guide (121), so that the cutting edge of the cutting blade (12) protrudes from the nail-out surface (31).

7. The staple cartridge assembly according to claim 6, characterized in that, The cutting blade (12) further includes a first surface (123) connected to the second surface (122), the first surface (123) being located in front of the second surface (122); the first surface (123) is contacted to keep the cutting edge of the cutting blade (12) protruding from the nail-out surface (31).

8. The staple cartridge assembly according to claim 7, characterized in that, The first surface (123) is a plane parallel to the nail-out surface (31).

9. The staple cartridge assembly according to claim 2, characterized in that, The cutting blade (12) further includes a second surface (122), at least a portion of which is an inclined surface that is inclined relative to the nail-out surface (31) or an arc surface that is inclined relative to the nail-out surface (31) and protrudes outward. The second surface (122) faces the rear and lower side of the nail-pushing plate (11). Pushing the second surface (122) can cause the cutting blade (12) to move upward in a direction perpendicular to the nail-out surface (31) under the guidance of the first guide (112) and the second guide (121), so that the cutting edge of the cutting blade (12) protrudes from the nail-out surface (31). The first surface (123) is connected to the second surface (122), and the first surface (123) is located on the front side of the second surface (122).

10. The staple cartridge assembly according to claim 1, characterized in that, The blade receiving groove (110) is provided with at least one set of first guide members (112), the set of first guide members (112) includes two first guide members (112) respectively located on opposite sidewalls of the blade receiving groove (110), the cutting blade (12) is provided with at least one set of second guide members (121), the set of second guide members (121) includes two second guide members (121) respectively located on opposite sides of the cutting blade, the two first guide members (112) of the set of first guide members (112) are matched one-to-one with the two second guide members (121) of the set of second guide members (121).

11. The staple cartridge assembly according to claim 10, characterized in that, The receiving groove (110) is provided with two sets of first guide members (112), which are separated in the extension direction of the nail outlet surface (31). The cutting blade (12) is provided with two sets of second guide members (121), which are separated in the extension direction of the nail outlet surface (31). The first guide member (112) in front of the two sets of first guide members (112) is engaged with the second guide member (121) in front of the two sets of second guide members (121), and the first guide member (112) in the rear is engaged with the second guide member (121) in the rear.

12. The staple cartridge assembly according to claim 1, characterized in that, The pusher plate assembly (1) further includes an elastic body (13), one end of which is mounted on the pusher plate (11) and the other end of which abuts against the cutting blade (12). The elastic body (13) is used to drive the cutting blade (12) to move downward in a direction perpendicular to the nail outlet surface (31).

13. The staple cartridge assembly according to claim 12, characterized in that, The pusher plate assembly (1) further includes a support plate (14), the cutter groove (110) includes a receiving cavity (113) for receiving at least a portion of the elastomer (13), the receiving cavity (113) includes an opening, and the support plate (14) is mounted on the pusher plate (11) to at least partially close the opening.

14. A surgical instrument comprising an end effector (100) and a pusher (2), the end effector (100) comprising a jaw assembly and a staple cartridge assembly (101) detachably mounted to the jaw assembly, the staple cartridge assembly (101) comprising a staple pusher plate (11) and a cutting blade (12), characterized in that: The pusher (2) is used to drive the pusher plate (11) to move forward along the length direction (X). The pusher (2) includes a forward-extending lifting blade part (221), which includes a third surface (2212). With the staple cartridge assembly (101) installed on the jaw assembly, the lifting part (221) is located below the cutting blade (12), and the third surface (2212) acts on the cutting blade (12) from below, causing the cutting edge of the cutting blade (12) to protrude from the staple ejection surface (31) of the staple cartridge assembly (101).

15. The surgical instrument according to claim 14, characterized in that, The third surface (2212) is a plane parallel to the nail ejection surface (31) of the nail cartridge assembly (101) mounted on the jaw assembly.

16. The surgical instrument according to claim 14, characterized in that, The lifting section (221) further includes a fourth surface (2211), which is either a plane inclined relative to the nail ejection surface (31) of the nail cartridge assembly (101) mounted on the jaw assembly or an arc surface inclined relative to the nail ejection surface (31) and recessed inward, and the fourth surface (2211) faces the front and upper sides of the surgical instrument. When the lifting part (221) moves forward, the fourth surface (2211) can contact and push the cutting blade (12) so that it slides relative to the fourth surface (2211), thereby causing the cutting blade (12) to move upward in a direction perpendicular to the nail-out surface (31).

17. The surgical instrument according to claim 16, characterized in that, The third surface (2212) and the fourth surface (2211) are connected, and the fourth surface (2211) is located in front of the third surface (2212).

18. The surgical instrument according to claim 14, characterized in that, The pusher (2) is provided with an arm (222) and the blade lifting part (221) are spaced apart, and a recess (223) is formed between the arm (222) and the blade lifting part (221) to accommodate the cutting blade (12).

19. The surgical instrument according to claim 18, characterized in that, The front end of the arm (222) is provided with a guide surface (2221). When the cutting blade (12) is housed in the recess (223), the guide surface (2221) protrudes forward from the tip of the cutting blade (12). The guide surface (2221) faces the recess (223). The guide surface (2221) is a slope or an arc surface.

20. The surgical instrument according to claim 18, characterized in that, The arm (222) is provided with a groove (2222) facing the recess (223). When the cutting blade (12) is received in the recess (223), the upper edge of the cutting blade (12) is embedded in the groove (2222).

21. The surgical instrument according to claim 14, characterized in that, The staple cartridge assembly (101) is the staple cartridge assembly according to any one of claims 1 to 13.

22. The surgical instrument according to claim 14, characterized in that, The action includes pushing; the third surface (2212) pushes the cutting blade (12) from below, causing the cutting blade (12) to move in a direction perpendicular to the nail outlet surface (31), so that the cutting edge of the cutting blade (12) protrudes from the nail outlet surface (31) of the nail cartridge assembly (101).

23. The surgical instrument according to claim 14, characterized in that, The action includes contact; the third surface (2212) contacts the cutting blade (12) from below to keep the cutting edge of the cutting blade (12) protruding from the nail-out surface (31).

Images