Staple cartridge assembly for anastomat and anastomat

Abstract

The utility model provides a staple cartridge assembly for an anastomat and the anastomat. The cartridge assembly includes a cartridge, a slider, and a cutting element. The cutting element comprises a first guide rail joint piece, a second guide rail joint piece and a cutting edge, and the cutting element is rotatably arranged in the sliding block around the first guide rail joint piece and can move in the staple cartridge along with the sliding block. A guide rail is arranged in the nail bin and provided with a near-end section, a middle section and a far-end section which are sequentially connected. The cutting element is in a cutting configuration when both the second rail engagement member and the first rail engagement member are located on the intermediate section. The distal end section includes a first distal end rail and a second distal end rail, the first rail engagement member moving on the first distal end rail of the distal end section and the second rail engagement member moving on the second distal end rail and actuating the cutting element to rotate about the first rail engagement member to a stowed configuration. The cutting element of the staple cartridge assembly can achieve conversion from the cutting configuration to the knife retracting configuration at the end of the anastomosis stroke.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically to a staple cartridge assembly and a stapler for a stapler. Background Technology

[0002] Anastomosing devices are commonly used medical instruments in minimally invasive surgery, used for tissue closure and transection. To transcribe tissue, an anastomosing device typically includes a cutting blade. Taking a laparoscopic linear stapler that generally requires replacement of the staple cartridge assembly as an example, its cutting blade is usually fixed inside the instrument and may be used multiple times during the surgery. However, the cutting blade inside the stapler wears down with each cut, reducing its sharpness and making it difficult to ensure a smooth tissue transection surface. This increases the risk of bleeding at the transection surface and reduces the quality of the surgery.

[0003] Therefore, there is a need to provide a stapler cartridge assembly and a stapler for a stapler to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially address the problem of decreased sharpness of the cutting blade within a stapler with use, this invention provides a staple cartridge assembly for a stapler, comprising a staple cartridge, a slider, and a cutting element. The slider is movable within the staple cartridge. The cutting element includes a first guide rail connector, a second guide rail connector, and a cutting blade. The cutting element is rotatably disposed within the slider about the first guide rail connector and moves with the slider within the staple cartridge. A guide rail for guiding the movement of the cutting element is provided within the staple cartridge, the guide rail having a proximal section, a middle section, and a distal section connected in sequence. The middle section is parallel to the upper surface of the staple cartridge. During the distal movement of the cutting element, the second guide rail connector and the first guide rail connector pass through the middle section sequentially. When both the second and first guide rail connectors are located on the middle section, the cutting element is in a cutting configuration with the cutting blade exposed outside the staple cartridge. The distal section includes a first distal terminal guide rail and a second distal terminal guide rail. The second distal terminal guide rail includes a ramp portion located between the intermediate section and the first distal terminal guide rail. The ramp portion has a notch. When the cutting element moves into the distal section in the distal direction, the second guide rail connector moves across the notch along the second distal terminal guide rail. The first guide rail connector enters the first distal terminal guide rail through the notch. The movement of the second guide rail connector along the ramp portion actuates the cutting element to rotate around the first guide rail connector moving along the first distal terminal guide rail to a retracted configuration in which the cutting blade is housed in the staple cartridge. The first guide rail connector is a pivot axis.

[0006] The second aspect of this utility model provides a stapler, including the stapler cartridge assembly described above.

[0007] According to the staple cartridge assembly and stapler of this utility model, after the anastomosis stroke is completed, the cutting blade is replaced along with the staple cartridge assembly. That is, the cutting blade can only be used once, ensuring the sharpness of the blade during surgery and effectively ensuring the flatness of the patient's tissue cut surface to reduce the risk of intraoperative bleeding, thereby improving the quality of surgery. Furthermore, at the end of the anastomosis stroke, the first guide rail connector and the second guide rail connector located in the middle section are separated by the ramp. The first guide rail connector moves on the first distal end guide rail in the distal section, and the second guide rail connector moves on the second distal end guide rail, actuating the cutting element to rotate around the first guide rail connector to the retracted blade configuration. This allows the cutting element to achieve the conversion from the cutting configuration to the retracted blade configuration at the end of the anastomosis stroke. Attached Figure Description

[0008] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings,

[0009] Figure 1 This is a three-dimensional schematic diagram of a stapler according to one embodiment of the present invention;

[0010] Figure 2 This is a three-dimensional exploded view of the end effector of the anastomosis device according to one embodiment of the present invention;

[0011] Figure 3 This is a three-dimensional exploded view of the staple cartridge assembly according to one embodiment of the present invention;

[0012] Figure 4 This is a front view schematic diagram of the internal structure of the staple cartridge assembly according to one embodiment of the present invention, in which the cutting element is located at the proximal end;

[0013] Figure 5 This is a three-dimensional schematic diagram of the guide rail of the staple cartridge assembly according to one embodiment of the present invention;

[0014] Figure 6 for Figure 5 An enlarged schematic diagram of part A in the diagram;

[0015] Figure 7 for Figure 5 An enlarged schematic diagram of part B in the diagram;

[0016] Figure 8 This is a front view schematic diagram of the staple cartridge assembly guide rail according to one embodiment of the present invention;

[0017] Figure 9 for Figure 8 An enlarged schematic diagram of part C in the diagram;

[0018] Figure 10 This is a three-dimensional enlarged schematic diagram of a staple cartridge assembly according to one embodiment of the present invention;

[0019] Figure 11 This is a three-dimensional enlarged schematic diagram of the cooperation between the cutting element and the staple cartridge in a staple cartridge assembly according to one embodiment of the present invention.

[0020] Figure 12 This is a three-dimensional schematic diagram of a cutting element according to one embodiment of the present invention;

[0021] Figure 13 This is a front view schematic diagram of the slider and cutting element in one embodiment of the present invention. In the figure, the cutting element is in a cutting configuration.

[0022] Figure 14 This is a front view schematic diagram of the slider and cutting element in one embodiment of the present invention. In the figure, the cutting element is in a retracted blade configuration.

[0023] Figure 15 This is a three-dimensional schematic diagram of the slider and the cutting element in one embodiment of the present invention. In the figure, the cutting element is in a cutting configuration.

[0024] Figure 16 This is a perspective view of the slider and cutting element cooperating in one embodiment of the present invention. In the figure, the cutting element is in a retracted blade configuration.

[0025] Figure 17 This is a schematic diagram illustrating the movement of the cutting element from the proximal end to the distal end in one embodiment of the present invention. Detailed Implementation

[0026] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0027] In this document, ordinal numbers such as “first” and “second” used in this application are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0028] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0029] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0030] The terms "distal" and "proximal" used in this application are directional terms commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator during the procedure, while "proximal" refers to the end closest to the operator. In a master-slave remote-controlled medical system, the operator can be understood as someone operating the device.

[0031] The terms “parallel” / “perpendicular” and similar expressions used in this application include absolute parallel / perpendicular relationships and approximately parallel / perpendicular relationships (e.g., relationships that differ from absolute parallel / perpendicular relationships by -5° to +5°), and have equivalent effects.

[0032] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0033] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0034] The stapler 10 of this invention can be a handheld stapler or a stapler used in computer-assisted medical systems, such as a surgical robot stapler driven by a robotic arm next to the patient. The present invention will now be described using the stapler 10 of a surgical robot stapler as an example. Please refer to... Figure 1 and Figure 2 The anastomosis device 10 includes an end effector 11 and an instrument cartridge 19. The instrument cartridge 19 can be connected to the end effector 11 via a drive assembly 12, and the drive assembly 12 actuates the end effector 11. The end effector 11 acts directly on the tissue, while the drive assembly 12 provides power and control to the end effector 11, enabling it to perform the corresponding operation. The drive assembly 12 may include a push-pull rod, a line, a rope, a belt, etc.

[0035] Reference Figure 2 and Figure 3 The end effector 11 includes a first clamp and a second clamp rotatably connected. The first clamp and the second clamp move from opening to closing to clamp tissue. The first clamp includes a staple cartridge seat 18 and a staple cartridge assembly 13 detachably disposed on the staple cartridge seat 18, and the second clamp is an abutment seat 16. The staple cartridge seat 18, on which the staple cartridge assembly 13 is mounted, is rotatable relative to the abutment seat 16 about a locating pin 17. (See reference...) Figure 3 The staple cartridge assembly 13 includes a staple cartridge 20 and a staple pusher cover 14. The staple cartridge 20 is used to accommodate staples 15, sliders 30, cutting elements 40, etc. The staple pusher cover 14 is located above the staple cartridge 20 and can be snapped into place with the staple cartridge 20 to prevent internal parts from falling out.

[0036] The anvil 16 is used to bend and shape the staple 15, thereby achieving tissue suturing.

[0037] The drive assembly 12 includes a drive rod and a beam member connected to the distal end of the drive rod. Driven by the rear end of the instrument, the drive rod moves the beam member forward or backward within the staple cartridge assembly 13. During the forward movement of the beam member, it pushes the slider 30 to trigger the staple pusher block, which pushes the anastomosis staples 15, achieving tissue anastomosis under the action of the staple holder 16.

[0038] The cutting element 40 is used to cut the sutured tissue to complete the separation of the closed tissue.

[0039] Reference Figure 4 During the operation, the first and second clamps of the stapler 10 close to hold the tissue, and then the drive assembly 12 moves in a distal direction D1 to fire the staples 15 to close the tissue. At the same time, the drive assembly 12 also drives the cutting element 40 in a distal direction D1 to cut the closed tissue, thus completing the closure and separation of the tissue. Figure 4 In the middle, the direction from the proximal end to the distal end is the distal direction D1, and the direction from the distal end to the proximal end is the proximal direction D2.

[0040] This utility model provides a cutting element 40 that is replaceable with the staple cartridge assembly 13, that is, a disposable cutting element 40. (Refer to 4 to...) Figure 17 The slider 30 can move within the staple cartridge 20, and the cutting element 40 is rotatably disposed in the slider 30 and can move with the slider 30 within the staple cartridge 20.

[0041] Reference Figure 12 and Figure 15 The cutting element 40 includes a second guide rail connector 42, a first guide rail connector 41, and a cutting blade 43. The cutting element 40 is rotatably disposed in the slider 30 about the first guide rail connector 41. The cutting element 40 has a cutting configuration in which the cutting blade 43 is exposed outside the staple cartridge 20, and a retracting configuration in which the cutting blade 43 is housed within the staple cartridge 20. (See reference...) Figures 13 to 16 The slider 30 has a receiving groove 31, and the first guide rail connector 41 is a pivot shaft, which is pivotally mounted in the receiving groove 31. The slider 30 has an opening 32, through which the cutting blade 43 extends and can rotate.

[0042] Reference Figures 4 to 11 The staple cartridge 20 is provided with a guide rail for guiding the movement of the cutting element 40. The guide rail has a proximal section 50, a middle section 60 and a distal section 70 connected in sequence.

[0043] The cutting element 40 can switch from a retractable cutting configuration to a cutting configuration in the proximal section 50.

[0044] Please refer to Figure 5 , Figure 6 and Figure 8 The proximal segment 50 includes a first proximal terminal guide 51 and a second proximal terminal guide 52. The first proximal terminal guide 51 is further away from the upper surface 21 of the staple cartridge 20 than the second proximal terminal guide 52.

[0045] The first near-terminal guide rail 51 is parallel to the upper surface 21 of the staple cartridge 20. It should be noted that the upper surface 21 of the staple cartridge 20 is the surface opposite to the abutment seat 16. The upper surface 21 of the staple cartridge 20 has a concave-convex structure and is not a plane in the strict sense, but its reference plane is a plane extending along the length direction of the staple cartridge 20. The plane parallel to the upper surface 21 of the staple cartridge 20 is the reference plane parallel to the upper surface 21 of the staple cartridge 20.

[0046] The second proximal terminal guide rail 52 includes two parts: one part is a parallel guide rail 521 which is disposed closer to the upper surface 21 of the staple cartridge 20 than the first proximal terminal guide rail 51 and is parallel to the first proximal terminal guide rail 51; the other part is a sloping guide surface 53 which is at least partially farther away from the upper surface 21 of the staple cartridge 20 than the parallel guide rail 521.

[0047] As the cutting element 40 moves distally in the direction D1 on the proximal section 50, the first guide rail connector 41 moves along the first proximal end guide rail 51, and the second guide rail connector 42 moves along the second proximal end guide rail 52. In the initial state, the slider 30 is located closest to the staple cartridge 20 in the proximal direction D2, the cutting element 40 is in a retracted configuration, and the cutting blade 43 is housed within the staple cartridge 20. As the cutting element 40 moves distally in the direction D1, the second guide rail connector 42, under the action of the ramp guide surface 53, causes the cutting element 40 to rotate around the first guide rail connector 41, changing from the retracted configuration to the cutting configuration.

[0048] Optionally, in the cutting configuration and the retracting configuration of the cutting element 40, the second guide rail connector 42 is located at the distal end of the first guide rail connector 41. The ramp guide surface 53 approaches the first near-terminal guide rail 51 in the distal direction D1. The intermediate section 60 is an extension of the first near-terminal guide rail 51.

[0049] In some examples, the second proximal terminal guide 52 and the first proximal terminal guide 51 converge at the distal end into the intermediate section 60. The intermediate section 60 includes a first guide surface 611 and a second guide surface 612 disposed opposite to each other, with the first guide surface 611 further away from the upper surface 21 of the staple cartridge 20 than the second guide surface 612. The ramp guide surface 53 of the second proximal terminal guide 52 is connected to the second guide surface 612 of the intermediate section 60, and the two are integral. The parallel guide rail 521 of the second proximal terminal guide 52 is connected to the intermediate section 60 and merges with the first guide surface 611. Thus, after the second guide rail coupling 42 moves along the parallel guide rail 521 to the confluence, it naturally moves to the first guide surface 611.

[0050] In other examples, the parallel rail 521 of the second proximal terminal guide 52 is shorter (dimension along the length direction of the staple cartridge 20) and / or narrower (dimension along the width direction DW of the staple cartridge 20) than the ramp guide surface 53, such that after the second guide joint 42 moves to the end along the second proximal terminal guide 52, it merges into the intermediate section 60 under the action of the ramp guide surface 53, without being restricted by the parallel rail 521.

[0051] Optionally, the second near-terminal guide rail 52 has a chamfer.

[0052] The cutting element 40 maintains the cutting configuration in the middle section 60.

[0053] Please refer to Figures 4 to 5 , Figure 7 and Figure 11 The middle section 60 is parallel to the upper surface 21 of the staple cartridge 20. During the movement of the cutting element 40 in the middle section 60, the second guide rail connector 42 and the first guide rail connector 41 pass through the middle section 60 one after the other. When both the second guide rail connector 42 and the first guide rail connector 41 are located on the middle section 60, the cutting element 40 is in a cutting configuration in which the cutting blade 43 is exposed outside the staple cartridge 20.

[0054] In some examples, the intermediate section 60 has two opposing guide surfaces 61: a first guide surface 611 and a second guide surface 612. Both the first guide surface 611 and the second guide surface 612 are parallel to the upper surface 21 of the staple cartridge 20. The first guide surface 611 and the second guide surface 612 are spaced apart along the height direction of the staple cartridge 20 (i.e., perpendicular to the upper surface 21 of the staple cartridge 20), and the first guide rail connector 41 and the second guide rail connector 42 can be accommodated between the first guide surface 611 and the second guide surface 612 and are guided by both.

[0055] In other examples, the intermediate section 60 may also have only one guide surface 61, supported on the side of the first guide rail joint 41 away from the upper surface 21 of the staple cartridge 20, i.e., only the first guide surface 611.

[0056] The cutting element 40 changes from a cutting configuration to a retracting configuration at its distal end 70.

[0057] Please refer to Figures 4 to 5 , Figure 7 and Figure 11 The distal segment 70 includes a first distal terminal guide rail 71 and a second distal terminal guide rail 72. The intermediate segment 60 branches into the first distal terminal guide rail 71 and the second distal terminal guide rail 72 at the distal end, providing different movement paths for the first guide rail connector 41 and the second guide rail connector 42.

[0058] The first distal end guide rail 71 is parallel to the upper surface 21 of the staple cartridge 20 and is an extension of the intermediate section 60 along the moving direction of the cutting element 40. The second distal end guide rail 72 includes a ramp portion 73 located between the intermediate section 60 and the first distal end guide rail 71. The first distal end guide rail 71 is further away from the upper surface 21 of the staple cartridge 20 than the second distal end guide rail 72. The ramp portion 73 guides the rotation of the cutting blade 43, realizing the transformation of the cutting blade 43 from a cutting configuration to a retracting configuration.

[0059] The ramp portion 73 has a notch 74. In some examples, the ramp portion 73 has a first ramp and a second ramp connected sequentially along the distal direction D1. Along the width direction DW, the size of the first ramp is smaller than the size of the second ramp. The first ramp, the second ramp, and the first distal terminal guide rail 71 enclose and form the notch 74. When the cutting element 40 moves into the distal segment 70 in the distal direction D1, the second guide rail connector 42 moves across the notch 74 along the second distal terminal guide rail 72, and the first guide rail connector 41 enters the first distal terminal guide rail 71 through the notch 74. The movement of the second guide rail connector 42 along the ramp portion 73 actuates the cutting element 40 to rotate around the first guide rail connector 41 moving along the first distal terminal guide rail 71 until the cutting blade 43 is housed in the staple cartridge 20.

[0060] In the cutting configuration and the retracting configuration of the cutting element 40, the second guide rail connector 42 is located at the distal end of the first guide rail connector 41. The ramp portion 73 is located away from the first distal terminal guide rail 71 in the distal direction D1.

[0061] The second distal end guide rail 72 also includes a parking portion 75 parallel to the upper surface 21 of the staple cartridge 20, which is connected to the distal end of the ramp portion 73. After the mating stroke is completed, the second guide rail engagement member 42 remains in the parking portion 75, keeping the cutting element 40 in the retracted configuration to prevent the user from being scratched by the cutting element 40 when changing the staple cartridge 20.

[0062] Along the width direction DW of the staple cartridge 20, the size of the second guide rail connector 42 is larger than the size of the first guide rail connector 41. The size of the notch 74 in the width direction DW of the staple cartridge 20 is smaller than the size of the second guide rail connector 42 but larger than the size of the first guide rail connector 41. When the cutting element 40 moves into the distal segment 70 in the distal direction D1, due to the size limitation of the notch 74, the second guide rail connector 42 cannot pass through the notch 74 and will move along the ramp 73, while the first guide rail connector 41 can pass through the notch 74 and enter the first distal end guide rail 71.

[0063] Understandably, in this scheme, the first near-terminal guide rail 51, the intermediate section 60, and the first far-terminal guide rail 71 are connected in sequence to form a straight track extending along the moving direction of the cutting element 40. The first guide rail connector 41 always travels on this track during operation, but the second guide rail connector 42 only travels on this track when in the intermediate section 60.

[0064] Optionally, the first guide rail connector 41 and / or the second guide rail connector 42 can be used as pivots to facilitate the rotation and forward movement of the cutting element 40.

[0065] Reference Figure 17 In (a), the staple cartridge assembly 13 and the staple seat 16 are in the open state, the cutting element 40 and the slider 30 are located at the nearest end of the staple cartridge, the cutting element 40 is held in the retracted configuration by the first proximal terminal guide rail 51 and the second proximal terminal guide rail 52, and the cutting blade 43 is housed in the staple cartridge 20.

[0066] Reference Figure 17 In (b), with the staple cartridge assembly 13 and the staple holder 16 in a closed state, the drive assembly 12 begins to push the slider 30 to move distally in the direction D1. The cutting element 40 is in a retracted configuration, with the cutting blade 43 housed within the staple cartridge 20. The proximal section 50 of the guide rail guides the movement of the cutting element 40, and the second guide rail connector 42, under the action of the ramp guide surface 53 of the second proximal end guide rail 52, drives the cutting element 40 to rotate around the first guide rail connector 41, switching to the cutting configuration.

[0067] Reference Figure 17 In step (c), the cutting element 40 moves with the slider 30 to the middle section 60 of the guide rail. At this time, both the first guide rail connector 41 and the second guide rail connector 42 are located on the middle section 60, the cutting element 40 is in the cutting configuration, and the cutting blade 43 is exposed outside the staple cartridge 20 to cut the tissue. The drive assembly 12 continuously pushes the slider 30, and the staple cartridge assembly 13 remains closed to fix the tissue.

[0068] Reference Figure 17 In step (d), the cutting element 40 enters the distal section 70 of the guide rail. The second guide rail connector 42 moves along the second distal end guide rail 72 across the notch 74 of the ramp 73, while the first guide rail connector 41 enters the first distal end guide rail 71 through the notch 74. The ramp 73 guides the cutting element 40 to rotate around the first guide rail connector 41, and the cutting blade 43 retracts into the staple cartridge 20. The cutting element 40 reaches the parking section 75 of the distal section 70, completely retracting into a blade-retracting configuration, with the cutting blade 43 housed within the staple cartridge 20. Until the mating and cutting operations are completed, the slider 30 stops moving, and the cutting element 40 rests in the parking section 75 to prevent scratching the user when changing the staple cartridge 20.

[0069] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0070] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A stapler cartridge assembly for a stapler, characterized in that, include: Pinning silos; A slider that can move within the staple cartridge; A cutting element, comprising a first guide rail connector, a second guide rail connector, and a cutting blade, wherein the cutting element is rotatably disposed in the slider about the first guide rail connector and can move with the slider within the staple cartridge; and The staple cartridge is provided with a guide rail for guiding the movement of the cutting element. The guide rail has a proximal section, a middle section and a distal section connected in sequence. The intermediate section is parallel to the upper surface of the staple cartridge. During the movement of the cutting element in the distal direction, the second guide rail connector and the first guide rail connector pass through the intermediate section one after the other. When both the second guide rail connector and the first guide rail connector are located on the intermediate section, the cutting element is in a cutting configuration in which the cutting edge is exposed outside the staple cartridge. The distal section includes a first distal terminal guide rail and a second distal terminal guide rail. The second distal terminal guide rail includes a ramp portion located between the intermediate section and the first distal terminal guide rail. The ramp portion has a notch. When the cutting element moves into the distal section in the distal direction, the second guide rail connector moves across the notch along the second distal terminal guide rail. The first guide rail connector enters the first distal terminal guide rail through the notch. The movement of the second guide rail connector along the ramp portion actuates the cutting element to rotate around the first guide rail connector moving along the first distal terminal guide rail to a retracted configuration in which the cutting blade is housed in the staple cartridge. The first guide rail connector is a pivot axis.

2. The staple cartridge assembly for a stapler according to claim 1, characterized in that, Along the width direction of the staple cartridge, the size of the second guide rail connector is larger than the size of the first guide rail connector, and the size of the notch in the width direction of the staple cartridge is smaller than the size of the second guide rail connector but larger than the size of the first guide rail connector.

3. The staple cartridge assembly for a stapler according to claim 1, characterized in that, In the cutting configuration of the cutting element, the second guide rail connector is located at the distal end of the first guide rail connector, the first distal terminal guide rail is further away from the upper surface of the staple cartridge than the second distal terminal guide rail, and the ramp portion is further away from the first distal terminal guide rail along the distal direction.

4. The staple cartridge assembly for a stapler according to claim 1, characterized in that, The first distal terminal guide rail is parallel to the upper surface of the staple cartridge and is an extension of the middle section along the moving direction of the cutting element. The middle section branches into the first distal terminal guide rail and the second distal terminal guide rail at its distal end. The second distal terminal guide rail also includes a parking portion parallel to the upper surface of the staple cartridge, and the parking portion is connected to the distal end of the ramp portion.

5. The staple cartridge assembly for a stapler according to any one of claims 1, 2, and 4, characterized in that, The proximal section includes a first proximal terminal guide rail and a second proximal terminal guide rail. The second proximal terminal guide rail includes a ramp guide surface. When the cutting element moves in the distal direction on the proximal section, the first guide rail connector moves along the first proximal terminal guide rail, and the second guide rail connector moves along the second proximal terminal guide rail. Under the action of the ramp guide surface, the second guide rail connector drives the cutting element to rotate around the first guide rail connector so that the cutting element changes from the blade retraction configuration to the cutting configuration.

6. The staple cartridge assembly for a stapler according to claim 5, characterized in that, In the cutting configuration of the cutting element, the second guide rail connector is located at the distal end of the first guide rail connector, the first proximal terminal guide rail is further away from the upper surface of the staple cartridge than the second proximal terminal guide rail, and the ramp guide surface approaches the first proximal terminal guide rail along the distal direction.

7. The staple cartridge assembly for a stapler according to claim 6, characterized in that, The first proximal terminal guide rail is parallel to the upper surface of the staple cartridge, the middle section is an extension of the first proximal terminal guide rail, and the second proximal terminal guide rail and the first proximal terminal guide rail merge into the middle section at the distal end.

8. The staple cartridge assembly for a stapler according to claim 6, characterized in that, The second guide rail connector is a pivot shaft.

9. The staple cartridge assembly for a stapler according to any one of claims 1 to 4, characterized in that, The slider has a receiving groove, the first guide rail connector is a pivot shaft, the pivot shaft is pivotally disposed in the receiving groove, and the slider has an opening through which the cutting blade extends and can rotate in the opening.

10. The staple cartridge assembly for a stapler according to claim 3, characterized in that, The proximal section includes a first proximal terminal guide rail and a second proximal terminal guide rail. The second proximal terminal guide rail includes a ramp guide surface. When the cutting element moves in the distal direction on the proximal section, the first guide rail connector moves along the first proximal terminal guide rail, and the second guide rail connector moves along the second proximal terminal guide rail. Under the action of the ramp guide surface, the second guide rail connector drives the cutting element to rotate around the first guide rail connector so that the cutting element changes from the blade retraction configuration to the cutting configuration.

11. The staple cartridge assembly for a stapler according to claim 10, characterized in that, The first proximal terminal guide is further away from the upper surface of the staple cartridge than the second proximal terminal guide, and the ramp guide surface approaches the first proximal terminal guide along the distal direction.

12. A stapler, characterized in that, Includes the staple cartridge assembly for an anastomosis device as described in any one of claims 1 to 11.

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