Surgical instrument

Abstract

This invention relates to a surgical instrument. The surgical instrument includes an end effector and a movable cutting assembly. The end effector includes a staple cartridge assembly; the cutting assembly includes a cutting component configured to move distally into the end effector; wherein the end effector is provided with a blocking device, the blocking device including a blocking component configured to switch between a closed state and an open state: when in the closed state, the blocking component is configured to prevent distal movement of the cutting component; when in the open state, the blocking component allows distal movement of the cutting component. Embodiments of this disclosure can prevent the surgical instrument from being accidentally fired when the staple cartridge is not installed or when an empty staple cartridge is installed, thereby effectively avoiding the risk of cutting without suturing during surgery.

Description

Technical Field

[0001] This disclosure relates to the field of medical devices, and more particularly to a surgical instrument. Background Technology

[0002] Laparoscopic staplers are common surgical instruments used to cut tissue and suture tissue on both sides of an incision. Considering economic factors and reliability, most laparoscopic staplers on the market currently use disposable staple cartridges. Disposable staple cartridges have the advantages of robust structure and low cost. However, in the absence of a staple cartridge or with unfired staples, there is a possibility of accidentally firing a staple, causing tissue to be cut without staples, resulting in unwanted bleeding. Summary of the Invention

[0003] This disclosure provides a surgical instrument, comprising: an end effector including a staple cartridge assembly; a movable cutting assembly including a cutting component configured to move distally into the end effector; wherein the end effector includes a blocking device including a blocking component configured to switch between a closed state and an open state: when in the closed state, the blocking component blocks distal movement of the cutting component; when in the open state, the blocking component allows distal movement of the cutting component.

[0004] In at least some embodiments, the cutting member moves axially, and the blocking assembly includes a first blocking member and a second blocking member disposed opposite each other in a direction intersecting the axial direction, wherein: when the blocking assembly is in a closed state, the first blocking member and the second blocking member engage with each other to cut off the movement channel of the cutting member moving distally; when the blocking assembly is in an open state, the first blocking member and the second blocking member separate from each other to allow the cutting member to pass between them and move distally.

[0005] In at least some embodiments, the blocking device further includes at least one biasing member configured to apply a biasing force to at least one of the first blocking member and the second blocking member to close the first blocking member and the second blocking member to each other.

[0006] In at least some embodiments, the blocking device further includes: at least one limiting member having a limiting groove, and at least one of the first blocking member and the second blocking member having a limiting protrusion, the limiting protrusion being configured to move within the limiting groove.

[0007] In at least some embodiments, the staple cartridge assembly includes a staple cartridge seat with a slot for receiving the blocking device.

[0008] In at least some embodiments, the staple cartridge assembly includes a staple cartridge and a movable staple pusher located in the staple cartridge, the staple pusher being configured to push the blocking assembly to switch the blocking assembly from the closed state to the open state when a new staple cartridge is installed in the staple cartridge holder.

[0009] In at least some embodiments, when the blocking assembly is in the closed state, the distal surface of the blocking assembly near the pusher component has a V-shaped structure, and the proximal surface of the blocking assembly away from the pusher component is a plane.

[0010] In at least some embodiments, each of the first blocking component and the second blocking component of the blocking assembly has a distal end face and a proximal end face disposed opposite to each other in the axial direction, each of the distal end faces being configured as an inclined plane and each of the proximal end faces being a plane.

[0011] In at least some embodiments, the staple cartridge assembly includes a staple cartridge holder, and when the staple cartridge holder is not equipped with a staple cartridge or is equipped with an empty staple cartridge, the blocking component is in the closed state; when a new staple cartridge is installed in the staple cartridge holder, the blocking component switches from the closed state to the open state.

[0012] In at least some embodiments, the surgical instrument is a laparoscopic anastomosis device. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0014] Figure 1 This is a schematic diagram of the structure of a surgical instrument according to an embodiment of the present disclosure; Figure 2 This is an exploded view of the surgical instruments according to embodiments of this disclosure; Figure 3A This is a three-dimensional schematic diagram of the surgical instruments according to an embodiment of the present disclosure; Figure 3B This is a plan view of the surgical instruments according to an embodiment of the present disclosure; Figure 4 This is a schematic diagram of the blocking device according to an embodiment of the present disclosure; Figure 5A This is a schematic diagram of the blocking device in a closed state according to an embodiment of the present disclosure; Figure 5B This is a schematic diagram of the force acting on the blocking device according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of the structure of the first blocking component according to an embodiment of the present disclosure; Figure 7 This is a schematic diagram of the structure of the second blocking component according to an embodiment of the present disclosure; Figure 8 This is a schematic diagram of the staple cartridge structure according to an embodiment of the present disclosure; Figure 9 This is a plan view of the surgical instrument in an embodiment of the present disclosure with a new staple cartridge installed. Figure 10 This is a schematic diagram of the structure of the first limiting component and the second limiting component according to an embodiment of the present disclosure; Figure 11 This is a plan view of a surgical instrument with an empty staple cartridge installed according to an embodiment of the present disclosure; Figure 12 This is a plan view of a surgical instrument according to an embodiment of the present disclosure, in which a used staple cartridge is installed. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0016] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” indicate that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0017] Unless otherwise defined, the features such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include strictly defined cases of "parallel," "perpendicular," and "identical," as well as cases that include a certain margin of error, such as "approximately parallel," "approximately perpendicular," and "approximately identical." For example, the aforementioned "approximately" may indicate that the difference between the compared objects is within 10% or 5% of the average value of the compared objects. Unless otherwise specified in the following embodiments of this disclosure, the quantity of a component or element is implied to mean that the component or element may be one or more, or can be understood as at least one. "At least one" means one or more, and "more than one" means two or more.

[0018] In this embodiment of the disclosure, "far end" and "far side" refer to the side of the device that is far from the operator, while "proximal end" and "proximal side" refer to the side of the device that is close to the operator.

[0019] This disclosure provides a surgical instrument, including: an end effector and a movable cutting assembly; the end effector includes a staple cartridge assembly; the movable cutting assembly includes a cutting component configured to move distally into the end effector; wherein the end effector is provided with a blocking device, the blocking device including a blocking component configured to switch between a closed state and an open state: when in the closed state, the blocking component is configured to block the cutting component from moving distally; when in the open state, the blocking component allows the cutting component to move distally.

[0020] In the surgical instruments provided in the above-described embodiments of this disclosure, by providing a blocking device in the end effector and switching the blocking device between a closed state and an open state, it is possible to prevent the suture staples from being accidentally fired when the surgical instrument is not equipped with an effective staple cartridge or is equipped with an empty staple cartridge, thereby effectively avoiding the risk of cutting without suturing during surgery.

[0021] The present disclosure will now be described through specific embodiments. To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present disclosure appears in more than one drawing, the component may be represented by the same reference numerals in each drawing.

[0022] Figure 1 This is a schematic diagram of the structure of a surgical instrument according to an embodiment of the present disclosure. Figure 2 This is an exploded view of a surgical instrument according to an embodiment of the present disclosure. Figure 3A This is a three-dimensional schematic diagram of a surgical instrument according to an embodiment of the present disclosure. Figure 3B This is a plan view of a surgical instrument according to an embodiment of the present disclosure.

[0023] Figures 1 to 3B This is a diagram showing surgical instruments without a staple cartridge. (Reference) Figures 1 to 3B The surgical instrument provided in this disclosure includes an end effector and a movable cutting assembly 2. The end effector includes a cartridge assembly 1 and an anvil 4, which are configured to open and close, allowing the end effector to switch between an open and closed state. The cartridge assembly 1 includes a cartridge seat 10 for receiving a cartridge 12. The cartridge 12 (see...) Figure 8 The anvil 4 has multiple rows of suture staples. The surface of the anvil 4 has multiple grooves (not shown). When the suture staples are ejected from the staple cartridge 12, they are deformed into a B-shape by the grooves on the anvil 4, thereby achieving suturing of the tissue.

[0024] For example, such as Figure 2 As shown, the movable cutting assembly 2 includes a cutting member 20 and a drive rod 21. The drive rod 21 is movable axially (e.g., in the X direction shown in the figure) and configured to drive the cutting member 20. The drive rod 21 is driven, for example, by a motor. The cutting member 20 is configured to move distally into an end effector. The cutting member 20 is, for example, a cutting blade used to cut tissue. For example, the cutting blade is located at opposite ends in the Z direction (e.g., perpendicular to the axial X). Figure 2 and Figure 4 The upper and lower ends (shown) are respectively provided with a first joint 201 and a second joint 202. These two joints can be slidably engaged with the anvil 4 and the staple cartridge assembly 1, respectively. In this way, by moving the cutting member 20, the anvil 4 and the staple cartridge assembly 1 can be controlled to move closer to or further away from each other. For example, when the cutting member 20 moves to the distal side, the anvil 4 and the staple cartridge assembly 1 move closer to each other; when the cutting member 20 moves to the proximal side, the anvil 4 and the staple cartridge assembly 1 move further away from each other.

[0025] Figure 4 This is a schematic diagram of the blocking device according to an embodiment of the present disclosure. Figure 5A This is a schematic diagram of the blocking device in a closed state according to an embodiment of the present disclosure. Figure 5B This is a schematic diagram of the force acting on the blocking device according to an embodiment of the present disclosure. Figure 6 This is a schematic diagram of the structure of the first blocking component according to an embodiment of the present disclosure. Figure 7 This is a schematic diagram of the structure of the second blocking component according to an embodiment of the present disclosure.

[0026] For example, refer to Figures 2 to 7 The end effector is equipped with a blocking device 3, which includes a blocking component 30. The blocking component 30 is configured to switch between a closed state and an open state: when in the closed state, the blocking component 30 is configured to prevent the cutting component 20 from moving distally; when in the open state, the blocking component 30 allows the cutting component 20 to move distally. That is, when the blocking component 30 is in the closed state, it blocks the movement channel T of the cutting component 20 (see...). Figure 3BThis prevents the cutting component 20 from moving forward. When the blocking component 30 is in the open state, the cutting component 20 can move forward.

[0027] In related technologies, without the blocking device 3, the operator may accidentally trigger the drive lever 21, causing the cutting component 20 to move forward. When the staple cartridge 12 is not installed, or when all the staples in the staple cartridge 12 are used up, or when a used staple cartridge is installed, such accidental triggering may cause unexpected tissue damage, potentially leading to bleeding. In this embodiment, by providing the blocking device 3, the movement channel T of the cutting component 20 can be controllably blocked, preventing accidental damage or bleeding caused by accidental triggering, improving the safety and stability of the surgical instrument, and reducing potential harm to the patient.

[0028] For example, such as Figures 3A to 5B As shown, the blocking component 30 includes components in a direction intersecting the axial direction X (e.g., Figure 3B The first blocking member 301 and the second blocking member 302 are arranged opposite each other in the Y direction (as shown in the diagram). When the blocking assembly 30 is in the closed state, the first blocking member 301 and the second blocking member 302 engage with each other to cut off the movement channel T of the cutting member 20 moving distally; when the blocking assembly 30 is in the open state, the first blocking member 301 and the second blocking member 302 separate from each other to allow the cutting member 20 to pass between them and move distally. In other words, when the first blocking member 301 and the second blocking member 302 are in contact with each other in the Y direction, they can block the movement channel T of the cutting member 20. When the first blocking member 301 and the second blocking member 302 are separated from each other in the Y direction, a gap is left between them, at which time the cutting member 20 can move through between them.

[0029] For example, such as Figure 6 As shown, the first blocking component 301 is a first slider, which has a first top surface T1, a first bottom surface B1 disposed opposite to each other, and a plurality of first side surfaces S1 connected between the first top surface T1 and the first bottom surface B1. The plurality of first side surfaces S1 include a first inclined surface XS1, which can be used as a first guide surface. Figure 7As shown, the second blocking component 302 is a second slider, which has a second top surface T2, a second bottom surface B2, and a plurality of second side surfaces S2 connected between the second top surface T2 and the second bottom surface B2. The plurality of second side surfaces S2 includes a second inclined surface XS2, which can be used as a second guide surface. When a new staple cartridge 12 is installed, the new staple cartridge 12 is pushed proximally into the staple cartridge seat 10 along the X direction. By setting the first and second guide surfaces, it is beneficial to push the first and second sliders out of the movement channel T with the installation of the new staple cartridge 12, ensuring that the cutting component 20 can still move forward during the use of the new staple cartridge 12. For example, the first blocking component 301 and the second blocking component 302 are mirror-symmetrically arranged relative to the axial direction X. This simplifies the manufacturing process and maintains the stability of the entire instrument during operation.

[0030] Figure 8 This is a schematic diagram of the staple bin structure according to an embodiment of the present disclosure. Figure 9 This is a plan view of the installation of a new staple cartridge in a surgical instrument according to an embodiment of this disclosure.

[0031] For example, such as Figure 8 and Figure 9 As shown, the staple cartridge assembly 1 also includes a movable staple pusher 121 located in the staple cartridge 12. The staple pusher 121 is configured such that when a new staple cartridge 12 is installed in the staple cartridge holder 10, the staple pusher 121 pushes the blocking assembly 30 to switch the blocking assembly 30 from a closed state to an open state, thereby ensuring that the cutting component 20 can still move forward during the use of the new staple cartridge 12. For example, the initial position of the staple pusher 121 is located at the proximal end of the staple cartridge 12. During use, the staple pusher 121 moves from the proximal end to the distal end of the staple cartridge 12. During this movement, the staple pusher 121 uses the wedge-shaped portion at its front end to push out the suture staples in the staple cartridge 12. The staple pusher 121 also has a proximal protrusion P that protrudes from the staple cartridge 12 by a certain distance. When installing a new staple cartridge 12, the proximal protrusion P moves to the right along the X direction to push the first and second sliders (i.e., the closed state) that are in contact with each other out of the movement channel T of the cutting member 20 (i.e., switch to the open state), thereby ensuring that the cutting member 20 can still move forward during the use of the new staple cartridge 12. In this embodiment, the staple pusher 121 can be configured to be driven by the cutting member 20. When the cutting member 20 moves distally, it pushes the staple pusher 121 distally; when the cutting member 20 retracts proximally, the staple pusher 121 remains stationary. If the staple pusher slider is not at the proximal end of the staple cartridge 12, it indicates that the staple cartridge 12 has been used.

[0032] For example, such as Figures 1 to 4As shown, the blocking device 3 further includes at least one limiting member 34, which has a limiting groove. At least one of the first blocking member 301 and the second blocking member 302 has a limiting protrusion, which is configured to move within the limiting groove. The limiting member 34 is configured to restrict the movement of at least one of the first blocking member 301 and the second blocking member 302 only in the Y direction, which intersects (e.g., is perpendicular to) the axial direction X. In this embodiment, one or two limiting members 34 can be provided. By providing two limiting members 34, it can be ensured that both the first blocking member 301 and the second blocking member 302 move only in the Y direction. The following description uses the blocking device 3 including the first limiting member 341 and the second limiting member 342 as an example.

[0033] Figure 10 This is a schematic diagram of the structure of the first limiting component and the second limiting component according to an embodiment of this disclosure. For example, as shown... Figure 10 As shown, the first limiting component 341 has a first limiting groove 341g, and the second limiting component 342 has a second limiting groove 342g. Figure 6 and Figure 7 As shown, the first blocking component 301 is a first slider with a first limiting protrusion T1P, and the second blocking component 302 is a second slider with a second limiting protrusion T2P. The first limiting protrusion T1P can slide in the first limiting groove 341g to guide the first slider to move in the Y direction, and the second limiting protrusion T2P can slide in the second limiting groove 342g to guide the second slider to move in the Y direction. This further ensures that the first slider and the second slider move relative to each other in the linear direction, improving the stability of the instrument. In this embodiment, the first limiting component 341 and the second limiting component 342 are mirror-symmetrically arranged relative to the axial direction X. This simplifies the manufacturing process and maintains the stability of the entire instrument during operation. For example, the first limiting component 341 and the second limiting component 342 can both be limiting plates, respectively covering the tops of the first blocking component 301 and the second blocking component 302.

[0034] For example, such as Figures 2 to 4 As shown, the blocking device 3 further includes at least one biasing member 32, which is configured to apply a biasing force to at least one of the first blocking member 301 and the second blocking member 302, so that the first blocking member 301 and the second blocking member 302 close together. In this embodiment, one or two biasing members 32 can be provided. By providing two biasing members 32, biasing forces can be applied to the first blocking member 301 and the second blocking member 302 respectively. In this way, when the first blocking member 301 and the second blocking member 302 are in the initial state, they can always remain pressed against each other, thereby achieving a closed state. The following description uses the blocking device 3 including the first biasing member 321 and the second biasing member 322 as an example.

[0035] For example, such as Figure 3B As shown, the blocking device 3 includes a first biasing component 321 and a second biasing component 322. The first biasing component 321 applies a first biasing force toward the second blocking component 302 to the first blocking component 301, and the second biasing component 322 applies a second biasing force toward the first blocking component 301 to the second blocking component 302. By applying the first and second biasing forces, the first blocking component 301 and the second blocking component 302 can remain abutting each other in the initial state. In this way, even if the staple cartridge 12 is not installed in the staple cartridge holder 10, the cutting component 20 can be prevented from moving forward, further improving the safety of the surgical instrument. In the embodiment of this disclosure, the first biasing component 321 and the second biasing component 322 are arranged in a mirror-symmetrical manner with respect to the axial direction X. This simplifies the manufacturing process and maintains the stability of the entire instrument during operation. For example, the first biasing component 321 and the second biasing component 322 are both elastic elements (e.g., springs), which can be respectively provided in the first receiving hole OP1 of the first blocking component 301 and the second receiving hole OP2 of the second blocking component 302 (see...). Figure 6 and Figure 7 ).

[0036] For example, such as Figure 5A As shown, the staple cartridge assembly 1 includes a staple cartridge base 10, which has a slot 101 for accommodating a blocking device 3. Further, for example, the slot 101 includes a first sliding groove 1011 and a second sliding groove 1012, which are respectively used to accommodate a first blocking member 301 and a second blocking member 302, so that the first blocking member 301 and the second blocking member 302 can move within the first sliding groove 1011 and the second sliding groove 1012 respectively, without affecting other components in the staple cartridge assembly 1.

[0037] For example, such as Figure 5A and Figure 5B As shown, when the blocking assembly 30 is in the closed state, the distal surface of the blocking assembly 30 near the pusher component 121 has a V-shaped structure (as indicated by the circle in the figure), while the proximal surface of the blocking assembly 30 away from the pusher component 121 is flat. By setting the distal surface to a V-shaped structure, it is beneficial for the pusher component 121 to push aside the first blocking component 301 and the second blocking component 302 when a new staple cartridge 12 is installed. When the new staple cartridge 12 is installed, an axial force F1 is generated. When subjected to an axial force F1 from left to right, the V-shaped structure converts the axial force F1 into a radial force to the side, pushing the first blocking component 301 and the second blocking component 302 apart (as shown in the figure). Figure 5B (The process shown above). An axial force F2 is generated when the cutting component moves distally. By setting the proximal surface to a plane, the axial force F2 from right to left can be counteracted (e.g., ...). Figure 5B (Lower part), thereby achieving the blocking effect on the cutting component 20.

[0038] Furthermore, for example, each of the first blocking member 301 and the second blocking member 302 has a distal end face and a proximal end face arranged opposite to each other in the axial direction X, each distal end face being configured as an inclined plane (i.e., the first inclined plane XS1 and the second inclined plane XS2 described above), and each proximal end face being a plane. This makes it more advantageous to realize the above-mentioned V-shaped structure and planar design.

[0039] In this embodiment of the disclosure, when the staple cartridge 10 is not equipped with the staple cartridge 12, or is equipped with an empty staple cartridge 12 (i.e., all the suture staples in the staple cartridge 12 have been fired and used up), or is equipped with a used staple cartridge 12, the blocking component 30 can always be in a closed state.

[0040] Figure 11 This is a plan view of a surgical instrument with an empty staple cartridge installed according to an embodiment of this disclosure. Figure 11 As shown, after all the staples in the staple cartridge 12 are fired, the first blocking component 301 and the second blocking component 302 engage with each other under the action of the biasing component, and the blocking assembly 30 is in a closed state. The forward path of the cutting component 20 is blocked, and even if it is accidentally fired, the cutting component 20 will be intercepted, thus preventing accidental triggering.

[0041] Figure 12 This is a plan view of a surgical instrument according to an embodiment of the present disclosure, in which a used staple cartridge 12 is installed. Figure 12 As shown, for a used staple cartridge 12, the staple pushing component 121 is not near the staple cartridge 12 (e.g., located in the middle of the staple cartridge 12). The first blocking component 301 and the second blocking component 302 also remain engaged with each other under the action of the biasing component. The blocking component 30 is in a closed state, and the forward path of the cutting component 20 is blocked. Even if it is accidentally fired, the cutting component 20 will be intercepted, thus preventing accidental triggering.

[0042] The surgical instruments provided in this embodiment of the present disclosure, by incorporating a blocking device, not only prevent the instrument's safety from being compromised due to accidental triggering of the cutting component 20, but also allow the blocking device to be switched from a closed to an open state after the installation of a new staple cartridge 12, thus not affecting the normal use of the new staple cartridge. This improves the safety of the surgical instruments while meeting the requirements of various usage environments.

[0043] The following points should be noted in this article: (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0044] (2) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0045] (3) The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure. The scope of protection of this disclosure is determined by the appended claims.

Claims

1. A surgical instrument, comprising: End effector, including a staple cartridge assembly; A movable cutting assembly, including a cutting component configured to move distally into the end effector; The end effector is provided with a blocking device, which includes a blocking component that is configured to switch between a closed state and an open state. When in the closed state, the blocking component is configured to prevent the cutting component from moving to the distal side; when in the open state, the blocking component allows the cutting component to move to the distal side.

2. The surgical instrument according to claim 1, wherein, The cutting component moves axially, and the blocking assembly includes: a first blocking component and a second blocking component disposed opposite to each other in a direction intersecting the axial direction, wherein: When the blocking assembly is in the closed state, the first blocking component and the second blocking component engage with each other to cut off the movement channel of the cutting component to the distal side; When the blocking assembly is in the open state, the first blocking component and the second blocking component separate from each other to allow the cutting component to pass between them and move to the distal side.

3. The surgical instrument according to claim 2, wherein, The blocking device further includes at least one biasing component configured to apply a biasing force to at least one of the first blocking component and the second blocking component, so that the first blocking component and the second blocking component close to each other.

4. The surgical instrument according to claim 2, wherein, The blocking device further includes: at least one limiting component having a limiting groove, and at least one of the first blocking component and the second blocking component having a limiting protrusion, the limiting protrusion being configured to move within the limiting groove.

5. The surgical instrument according to claim 1, wherein, The staple cartridge assembly includes a staple cartridge seat with a slot for accommodating the blocking device.

6. The surgical instrument according to any one of claims 1 to 5, wherein, The staple cartridge assembly includes a staple cartridge and a movable staple pusher located in the staple cartridge. The staple pusher is configured such that when a new staple cartridge is installed in the staple cartridge holder, the staple pusher pushes the blocking assembly to switch the blocking assembly from the closed state to the open state.

7. The surgical instrument according to claim 6, wherein, When the blocking assembly is in the closed state, the distal surface of the blocking assembly near the pusher component has a V-shaped structure, and the proximal surface of the blocking assembly away from the pusher component is a plane.

8. The surgical instrument according to claim 7, wherein, Each of the first and second blocking components of the blocking assembly has a distal end face and a proximal end face disposed opposite to each other in the axial direction, each of the distal end faces being an inclined surface and each of the proximal end faces being a plane.

9. The surgical instrument according to any one of claims 1 to 5, wherein, The staple cartridge assembly includes a staple cartridge holder. When the staple cartridge holder is not equipped with a staple cartridge or is equipped with an empty staple cartridge, the blocking component is in the closed state; When a new staple cartridge is installed in the staple cartridge holder, the blocking component switches from the closed state to the open state.

10. The surgical instrument according to any one of claims 1 to 5, wherein, The surgical instrument is a laparoscopic anastomosis device.

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