Disassembly tool and stapler assembly

Abstract

The application provides a dismounting tool and an anastomat assembly. The dismounting tool comprises a shell, the shell comprises a top surface and a bottom surface opposite to the top surface, and the two ends of the shell are a first dismounting part and a second dismounting part. The first dismounting part is configured to mount or dismount a front end detachable part of a staple holder to or from the staple holder, and the second dismounting part is configured to dismount a cartridge from a cartridge assembly of the anastomat. When the first dismounting part works, the top surface faces upward and the bottom surface faces downward; when the second dismounting part works, the top surface faces downward and the bottom surface faces upward. Compared with the prior art, the dismounting tool can realize the dismounting of the staple holder, the front end detachable part of the staple holder and the cartridge assembly and the mounting of the staple holder through the structural design of the first dismounting part and the second dismounting part. The dismounting tool is simple in structure, fast and convenient in dismounting and rich in functions.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a disassembly tool and an anastomosis device assembly. Background Technology

[0002] Anastomosing devices are essential instruments in laparoscopic surgery. They replace traditional manual suturing, using titanium staples to sever or anastomose tissues. The operation is simple and rapid, significantly shortening surgical time. Anastomosing devices make manual anastomosis in narrow surgical fields and deep areas easier, more accurate, and more secure, thus significantly reducing the incidence of anastomotic leakage.

[0003] Currently, endovascular staplers are widely used in various open and minimally invasive surgeries. In some cases, a stapler that can penetrate deep into tissues and is easy to operate is required. This necessitates that the anvil of the stapler be longer and thinner at the front end, and that it be easily disassembled. While the shape of the anvil's front end in existing staplers has been improved to a flat and elongated shape, most manufacturers simply weld this flat and elongated part directly to the anvil. Even those manufacturers that have made it detachable require specialized tooling for installation or removal due to unreasonable design. This necessitates a certain level of proficiency with the instrument during operation, making it less convenient and faster.

[0004] In surgical procedures, staplers have become indispensable auxiliary medical devices in the suturing process of human tissues. The application of staplers offers numerous advantages, including less intraoperative bleeding, shorter operation time, reduced manual error, prevention of infection, and faster postoperative functional recovery. Staplers and disposable staple cartridges are suitable for the resection, transection, and anastomosis of tissues in abdominal, obstetric, pediatric, and thoracic surgeries. They can also be used for the resection and transection of liver parenchyma, hepatic vessels, and gallbladder ducts. However, existing stapler cartridge assemblies are designed for single-use only; the cartridge assembly cannot be disassembled and is discarded entirely after use, wasting valuable resources. This not only increases costs and burdens patients and their families but also negatively impacts environmental protection.

[0005] In view of this, it is indeed necessary to provide a disassembly tool and an anastomosis device assembly to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a disassembly tool and a stapler assembly that can disassemble the staple cartridge and the front end of the staple seat of a stapler.

[0007] To achieve the above objectives, the present invention provides a disassembly tool for use with a stapler, comprising: a housing, the housing including a top surface and a bottom surface opposite to the top surface, and a first disassembly portion and a second disassembly portion at both ends of the housing; the first disassembly portion is configured to install or remove a detachable portion of the front end of the stapler's anvil from the anvil; the second disassembly portion is configured to remove the staple cartridge from the stapler's staple cartridge assembly; when the first disassembly portion is in operation, the top surface faces upward and the bottom surface faces downward; when the second disassembly portion is in operation, the top surface faces downward and the bottom surface faces upward.

[0008] As a further improvement of the present invention, the first disassembly part includes a mounting part for accommodating the detachable front end portion of the anvil and a pressing part disposed on the top surface and elastically connected to the top surface. Through the cooperation of the mounting part and the pressing part, the detachable front end portion of the anvil is fixed in the first disassembly part.

[0009] As a further improvement of the present invention, the mounting portion includes an inlet, a first engaging portion and a second engaging portion arranged sequentially from the inlet, the first engaging portion being used to engage with the anvil, and the first engaging portion having a support portion extending into the mounting portion for supporting the anvil; the second engaging portion extending upward from the first engaging portion toward the top surface and matching the shape of the detachable front end portion of the anvil, being used to engage with the detachable front end portion of the anvil.

[0010] As a further improvement of the present invention, the mounting part further includes guide walls disposed on both sides of the first snap-fit ​​part, the guide walls are provided with guide protrusions, the lower end surface of the guide protrusions serves as a guide surface, the guide surface includes a first end close to the inlet and a second end away from the inlet, and the distance between the guide surface and the first snap-fit ​​part gradually decreases from the first end to the second end.

[0011] As a further improvement of the present invention, the pressing part includes a pressing protrusion extending toward the mounting part, the pressing protrusion being configured to cooperate with a pressing groove on the detachable front end portion of the anvil to fix the detachable front end portion of the anvil in the second snap-fit ​​part.

[0012] As a further improvement of the present invention, the second disassembly portion is a mounting groove recessed from the bottom surface toward the top surface. The mounting groove includes an opening and an inner wall disposed away from the opening. The bottom surface at least partially covers the mounting groove, and an inclined limiting portion is formed between the inner wall and the bottom surface. The limiting portion is configured to limit and fix the head of the staple cartridge within the second disassembly portion.

[0013] As a further improvement of the present invention, the two peripheral walls at the opening extend toward each other to form a disassembly position, the disassembly position being configured to cooperate with the staple cartridge seat on the staple cartridge assembly to separate the staple cartridge seat from the staple cartridge.

[0014] Another object of the present invention is to provide an anastomosis device assembly, comprising:

[0015] Disassembly tools;

[0016] An anvil assembly includes an anvil and a detachable front end portion of the anvil, the detachable front end portion of the anvil being shaped like the head of needle-nose pliers;

[0017] The pin plug assembly includes the pin plug and the pin plug holder.

[0018] As a further improvement of the present invention, the first disassembly part includes an installation part and a pressing part. The detachable portion at the front end of the anvil includes a first part away from the anvil and a second part close to the anvil. The shape of the first part matches the shape of the second snap-fit ​​part on the installation part, and the first part is provided with a pressing groove for cooperating with the pressing protrusion on the pressing part. The second part is provided with an elastic snap-fit ​​part for snap-fit ​​connection with the anvil. The anvil is provided with a receiving groove corresponding to the position of the elastic snap-fit ​​part, and the arcuate side of the anvil cooperates with the support part on the first snap-fit ​​part on the installation part.

[0019] As a further improvement of the present invention, the staple cartridge includes an arc-shaped head and a snap-fit ​​groove near the head. The staple cartridge seat has a snap-fit ​​part corresponding to the snap-fit ​​groove. The snap-fit ​​part snaps into the snap-fit ​​groove to achieve the snap-fit ​​connection between the staple cartridge and the staple cartridge seat. The second disassembly part includes an installation groove, which includes an opening and an inner wall. The head cooperates with a limiting part at the inner wall. The snap-fit ​​part has two disassembly positions. The distance between the two disassembly positions is greater than the distance between the two snap-fit ​​grooves and less than or equal to the distance between the two snap-fit ​​parts, so that the snap-fit ​​part can be separated from the snap-fit ​​groove through the disassembly positions.

[0020] The beneficial effects of this invention are as follows: The disassembly tool of this invention places the detachable front end of the anvil at the first disassembly part, and pushes the anvil horizontally into the detachable front end of the anvil at the first disassembly part, thus completing the installation of the anvil and the detachable front end of the anvil. After the anvil is installed, the anvil is disassembled through the first disassembly part. Then, the detachable front end of the anvil is removed from the first disassembly part, completing the disassembly of the detachable front end of the anvil. Similarly, through the structural design of the second disassembly part, the staple cartridge assembly can be cleverly disassembled, and the staple cartridge can be removed from the staple cartridge assembly. Compared with the prior art, the disassembly tool of this invention has a simple structure, is quick and convenient to disassemble, and can realize the disassembly of the anvil, the detachable front end of the anvil, and the staple cartridge assembly, as well as the installation between the detachable front end of the anvil and the anvil, thus providing rich functionality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a stapler assembly according to a preferred embodiment of the present invention.

[0022] Figure 2 yes Figure 1 A structural diagram from another perspective.

[0023] Figure 3 yes Figure 1 A schematic diagram of the structure of the center anchor seat assembly.

[0024] Figure 4 yes Figure 3 A schematic diagram of the structure of the center anchor seat.

[0025] Figure 5 yes Figure 3 A schematic diagram illustrating the use of the detachable part at the front end of the stapler anvil.

[0026] Figure 6 yes Figure 1 A schematic diagram of the structure of the nail chamber assembly.

[0027] Figure 7 yes Figure 6 A schematic diagram of the staple cartridge holder.

[0028] Figure 8 yes Figure 6 A schematic diagram of the staple cartridge structure.

[0029] Figure 9 yes Figure 1 A schematic diagram of the disassembly tool.

[0030] Figure 10 yes Figure 9 A structural diagram from another perspective.

[0031] Figure 11 yes Figure 9 The right view.

[0032] Figure 12 This is a schematic diagram showing the snap-fit ​​installation of the detachable part at the front end of the stapler anvil and the second snap-fit ​​part.

[0033] Figure 13 yes Figure 9 A bottom view.

[0034] Figure 14 yes Figure 9 The left view. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0037] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Please see Figures 1 to 14 This invention provides a stapler assembly 200, including an anvil assembly 110, a staple cartridge assembly 120, and a disassembly tool 100. Both the anvil assembly 110 and the staple cartridge assembly 120 are components mounted on the stapler (not shown in the figure). In some applications, it is necessary to disassemble the anvil assembly 110 and the staple cartridge assembly 120 from the stapler. Therefore, this invention proposes a disassembly tool 100 for disassembling the anvil assembly 110 and the staple cartridge assembly 120.

[0039] Please combine Figures 1 to 5As shown, specifically, the anvil assembly 110 includes an anvil 2 and a removable front end portion 3 of the anvil 2. The removable front end portion 3 includes a first part 31 away from the anvil 2 and a second part 32 near the anvil 2. The second part 32 is provided with an elastic latching part 321 for latching with the anvil 2. The anvil 2 is provided with a receiving groove 21 corresponding to the position of the elastic latching part 321. When the elastic latching part 321 enters the receiving groove 21, the installation of the removable front end portion 3 of the anvil 2 and the anvil 2 is completed. The disassembly tool 100 can install the removable front end portion 3 of the anvil 2 onto or remove it from the anvil 2, facilitating user operation.

[0040] Please combine Figures 6 to 8 As shown, the staple cartridge assembly 120 includes a staple cartridge base 4 and a staple cartridge 5 mounted on the staple cartridge base 4. The staple cartridge 5 includes an arc-shaped head 51 and a snap-fit ​​groove 52 located near the head 51. The staple cartridge base 4 has a snap-fit ​​part 41 at a position corresponding to the snap-fit ​​groove 52, and the snap-fit ​​part 41 snaps into the snap-fit ​​groove 52 to achieve the snap-fit ​​connection between the staple cartridge 5 and the staple cartridge base 4. The disassembly tool 100 can remove the staple cartridge 5 from the staple cartridge assembly 120 of the stapler.

[0041] The main function of the disassembly tool 100 is to install the detachable part 3 at the front end of the anvil onto or remove it from the anvil 2; and to remove the staple cartridge 5 from the staple cartridge assembly 120 of the stapler, making it convenient for users to operate.

[0042] Please see Figures 1 to 12 As shown, the disassembly tool 100 further includes a housing 1, which includes a top surface 11 and a bottom surface 12 opposite to the top surface 11. The two ends of the housing are a first disassembly part 13 and a second disassembly part 121. The first disassembly part 13 is configured to install the detachable part 3 of the anvil of the stapler to or remove it from the anvil 2. The second disassembly part 121 is configured to remove the staple cartridge 5 from the staple cartridge assembly 120 of the stapler. When the first disassembly part 13 is working, the top surface 11 faces upward and the bottom surface 12 faces downward. When the second disassembly part 121 is working, the top surface 11 faces downward and the bottom surface 12 faces upward.

[0043] Please combine Figure 2 and Figure 10 As shown, preferably, the side of the housing 1 is provided with a grip portion 14. The grip portion 14 has an ergonomic structure. The two sides of the grip portion 14 are provided with grooves 141. The grooves 141 are generally elongated oval, which are suitable for the hand to rest against, making it convenient to exert force and achieving a better anti-slip effect.

[0044] Please see Figure 10As shown, the first disassembly part 13 includes a mounting part 131 for accommodating the detachable front end portion 3 of the anvil and a pressing part 132 provided on the top surface 11 and elastically connected to the top surface 11. Through the cooperation of the mounting part 131 and the pressing part 132, the detachable front end portion 3 of the anvil is fixed in the first disassembly part 13.

[0045] Please see Figures 10 to 12 As shown, specifically, the pressing part 132 includes a pressing protrusion 1321 extending toward the mounting part 131. The pressing protrusion 1321 is configured to cooperate with the pressing groove 311 on the front detachable part 3 of the anvil seat to fix the front detachable part 3 of the anvil seat in the second snap-fit ​​part 1313.

[0046] Please see Figure 11 As shown, the mounting part 131 further includes an inlet 1311, a first engaging part 1312 and a second engaging part 1313 arranged sequentially from the inlet 1311 inward. The first engaging part 1312 is used to engage with the anvil 2. The first engaging part 1312 is provided with a support part 13121 extending into the mounting part 131 to support the anvil 2. The second engaging part 1313 extends upward from the first engaging part 1312 toward the top surface 11 and matches the shape of the detachable front end part 3 of the anvil, and is used to engage with the detachable front end part 3 of the anvil.

[0047] Please see Figures 1 to 11 As shown, the shape of the first part 31 matches the shape of the second snap-fit ​​part 1313 on the mounting part 131, facilitating the snap-fit ​​between the first part 31 and the second snap-fit ​​part 1313. This is beneficial for placing the removable front part 3 of the anvil and for smoothly removing the removable front part 3 of the anvil. Furthermore, the first part 31 is provided with a pressing groove 311, which cooperates with the pressing protrusion 1321 on the pressing part 132. This groove is used to fix the removable front part 3 of the anvil when removing the anvil 2, preventing it from moving and facilitating faster removal of the anvil 2. Additionally, the arc-shaped side of the anvil 2 cooperates with the support part 13121 on the first snap-fit ​​part 1312. When the arc-shaped side slides onto the support part 13121, the support part 13121 supports the anvil 2, ensuring that the bottom height of the anvil 2 matches the bottom height of the second part 32. This lays the foundation for the subsequent snap-fit ​​part 41 to snap into the snap-fit ​​groove 52.

[0048] Please see Figures 11 to 12 As shown, preferably, the mounting part 131 further includes guide walls 1314 disposed on both sides of the first snap-fit ​​part 1312. The guide walls 1314 are provided with guide protrusions 1315. The guide protrusions 1315 limit the height of the detachable part 3 at the front end of the anvil, preventing the detachable part 3 at the front end of the anvil from tilting upward, so that the detachable part 3 at the front end of the anvil is tightly fitted with the second snap-fit ​​part 1313.

[0049] Please see Figures 1 to 12 As shown, the lower end face of the guide protrusion 1315 serves as the guide surface 1316. The guide surface 1316 includes a first end 1317 near the inlet 1311 and a second end 1318 away from the inlet 1311. From the first end 1317 to the second end 1318, the distance between the guide surface 1316 and the first engaging portion 1312 gradually decreases. As the anvil 2 is gradually inserted into the first engaging portion 1312, the anvil 2 and the detachable front end portion 3 of the anvil 2 gradually approach each other. The anvil 2 is gradually inserted into the detachable front end portion 3 of the anvil 2 along the extending direction of the support portion 13121. When the anvil 2 moves to the position of the second end 1318, the elastic latching portion 321 is in the receiving groove 21. The elastic latching portion 321 springs open from its clearance position in the receiving groove 21, and the elastic latching portion 321 returns to its original position, engaging with the receiving groove 21, thus completing the installation of the anvil 2 and the detachable front end portion 3 of the anvil 2.

[0050] The process of installing the anvil 2 is as follows: The detachable part 3 at the front end of the anvil is placed into the second latching part 1313 inside the first disassembly part 13, and fixed in position under the constraint of the guide protrusion 1315. At this time, the first part 31 is tightly attached to the second latching part 1313, and the elastic latching part 321 is partially suspended above the first latching part 1312, and the height of the empty space is just enough to accommodate the anvil 2. Then the anvil 2 is placed in the first latching part 1312, with the bottom surface of the anvil 2 located above the support part 13121, which facilitates the horizontal pushing of the anvil 2. Under the guidance of the guide surface 1316, the anvil 2 gradually moves from the first end to the position of the second end 1318, and the elastic latching part 321 enters the receiving groove 21. When it first enters the receiving groove 21, the elastic latching part 321 is in a compressed state; when the elastic latching part 321 moves to the clearance position in the receiving groove 21, the elastic latching part 321 pops open, the elastic latching part 321 returns to its original state, and engages with the receiving groove 21, thus completing the installation of the anvil seat 2 and the detachable part 3 at the front end of the anvil seat.

[0051] The process of disassembling the anvil 2 and the removable front part 3 of the anvil 2 is as follows: After installing the anvil 2, press the pressing part 132, causing the pressing protrusion 1321 to descend into the pressing groove 311, thus fixing the removable front part 3 of the anvil 2. Use external force to pull the anvil 2 away from the first locking part 1312. The receiving groove 21 moves accordingly, causing the elastic latch 321 to disengage from the receiving groove 21. The removable front part 3 of the anvil 2 separates from the anvil 2, and the anvil 2 is pulled out, completing the disassembly of the anvil 2. Then, remove the removable front part 3 of the anvil 2 from the second locking part 1313 of the disassembly tool 100, thus completing the disassembly of the removable front part 300 of the anvil 2.

[0052] Please see Figure 6 and Figure 13As shown, in this embodiment, the second disassembly portion 121 is a mounting groove recessed from the bottom surface 12 towards the top surface 11. The mounting groove includes an opening 1211 and an inner wall 1212 disposed away from the opening 1211, with the bottom surface 12 at least partially covering the mounting groove. Furthermore, an inclined limiting portion 1213 is formed between the inner wall 1212 and the bottom surface 12, and the head 51 cooperates with the limiting portion 1213 at the inner wall 1212. The limiting portion 1213 is configured to limit and fix the head 51 of the staple cartridge 5 within the second disassembly portion 121.

[0053] Please see Figure 6 , Figure 13 and Figure 14 As shown, further, the two peripheral walls 1214 at the opening 1211 extend toward each other to form a disassembly position 1215. The disassembly position 1215 is configured to cooperate with the staple cartridge seat 4 on the staple cartridge assembly 120 to provide a fulcrum for the staple cartridge assembly 120 so that the staple cartridge seat 4 can be separated from the staple cartridge 5.

[0054] Please see Figure 7 , Figure 8 and Figure 13 As shown, preferably, the latching part 41 is provided with two disassembly positions 1215. The distance between the two disassembly positions 1215 is greater than the distance between the two latching grooves 52 and less than or equal to the distance between the two latching parts 41, so that when the nail cartridge 5 is disassembled, the disassembly position 1215 presses against the latching part 41 and the latching groove 52, so as to separate the latching part 41 from the latching groove 52 through the disassembly position 1215.

[0055] The process of disassembling the staple cartridge 5: The second disassembly part 121 is activated, with the bottom surface 12 of the disassembly tool 100 facing upwards and the top surface 11 facing downwards. The staple cartridge assembly 120 is placed into the second disassembly part 121. At this time, the staple cartridge 5 is below the limiting part 1213, and the latching part 41 is placed above the disassembly position 1215. The disassembly position 1215 provides support for the latching part 41 and the latching groove 52. Then, the end of the staple cartridge seat 4 away from the first disassembly part 13 is pressed downwards. The disassembly position 1215 acts as a fulcrum, and the limiting part 1213 limits the staple cartridge 5, preventing the staple cartridge 5 from tilting upwards and detaching from the second disassembly part 121. The latching part 41 of the staple cartridge seat 4 is subjected to an upward force, causing the latching part 41 to disengage from the latching groove 52. That is, the staple cartridge 5 is disengaged from the staple cartridge seat 4, completing the disassembly of the staple cartridge 5.

[0056] In summary, the disassembly tool 100 of the present invention places the detachable front end portion 3 of the anvil at the first disassembly part, and pushes the anvil horizontally into the detachable front end portion 3 of the anvil at the first disassembly part, thus completing the installation of the anvil 2 and the detachable front end portion 3 of the anvil. After the anvil 2 is installed, the anvil 2 is disassembled by the first disassembly part 13. Then, the detachable front end portion 3 of the anvil is taken out from the first disassembly part 13, thus completing the disassembly of the detachable front end portion of the anvil. Similarly, through the structural design of the second disassembly part 121, the staple cartridge assembly 120 can be disassembled ingeniously, and the staple cartridge 5 can be removed from the staple cartridge assembly 120. Compared with the prior art, the disassembly tool 100 of the present invention has a simple structure, is quick and convenient to disassemble, and can realize the disassembly of the anvil 2, the detachable front end portion 3 of the anvil, and the staple cartridge assembly 120, as well as the installation of the anvil 2, thus having rich functions.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A disassembly tool applied to a stapler, characterized in that, The device includes: a housing comprising a top surface and a bottom surface opposite the top surface; the housing has a first disassembly portion and a second disassembly portion at both ends; the first disassembly portion is configured to install or remove a detachable portion of the anvil of the stapler from the anvil; the second disassembly portion is configured to remove the staple cartridge from the staple cartridge assembly of the stapler; when the first disassembly portion is in operation, the top surface faces upward and the bottom surface faces downward; when the second disassembly portion is in operation, the top surface faces downward and the bottom surface faces upward. The first disassembly part includes a mounting part for accommodating the detachable front end of the anvil and a pressing part disposed on the top surface and elastically connected to the top surface. The detachable front end of the anvil is fixed in the first disassembly part by the cooperation of the mounting part and the pressing part. The mounting portion includes an inlet, a first engaging portion and a second engaging portion arranged sequentially from the inlet. The first engaging portion is used to engage with the anvil and has a support portion extending into the mounting portion to support the anvil. The second engaging portion extends upward from the first engaging portion toward the top surface and matches the shape of the detachable front end of the anvil, and is used to engage with the detachable front end of the anvil. The mounting portion also includes guide walls on both sides of the first engaging portion. The guide walls have guide protrusions, and the lower end surface of the guide protrusions serves as a guide surface. The guide surface includes a first end near the inlet and a second end away from the inlet. From the first end to the second end, the distance between the guide surface and the first engaging portion gradually decreases. The pressing part includes a pressing protrusion extending toward the mounting part, the pressing protrusion being configured to cooperate with a pressing groove on the detachable front end of the anvil to fix the detachable front end of the anvil in the second snap-fit ​​part; The second disassembly portion is a mounting groove recessed from the bottom surface toward the top surface. The mounting groove includes an opening and an inner wall disposed away from the opening. The bottom surface at least partially covers the mounting groove, and an inclined limiting portion is formed between the inner wall and the bottom surface. The limiting portion is configured to limit and fix the head of the staple cartridge within the second disassembly portion.

2. The disassembly tool according to claim 1, characterized in that, The two peripheral walls at the opening extend toward each other to form a disassembly position, which is configured to cooperate with the staple cartridge seat on the staple cartridge assembly to separate the staple cartridge seat from the staple cartridge.

3. A stapler assembly, characterized in that, include: The disassembly tool as described in any one of claims 1 to 2; An anvil assembly includes an anvil and a detachable front end portion of the anvil, the detachable front end portion of the anvil being shaped like the head of needle-nose pliers; The stapler assembly includes the stapler and the stapler holder.

4. The anastomosis device assembly according to claim 3, characterized in that, The detachable front end of the anvil includes a first part away from the anvil and a second part close to the anvil. The first part matches the shape of the second snap-fit ​​part on the mounting part, and the first part is provided with a pressing groove for cooperating with the pressing protrusion on the pressing part. The second part is provided with an elastic snap-fit ​​part for snap-fit ​​connection with the anvil. The anvil is provided with a receiving groove corresponding to the position of the elastic snap-fit ​​part, and the arcuate side of the anvil cooperates with the support part on the first snap-fit ​​part on the mounting part.

5. The anastomosis device assembly according to claim 3, characterized in that, The staple cartridge includes an arc-shaped head and a snap-fit ​​groove near the head. The staple cartridge seat has a snap-fit ​​part corresponding to the snap-fit ​​groove. The snap-fit ​​part snaps into the snap-fit ​​groove to achieve the snap-fit ​​connection between the staple cartridge and the staple cartridge seat. The head cooperates with the limiting part at the inner wall. The snap-fit ​​part has two disassembly positions. The distance between the two disassembly positions is greater than the distance between the two snap-fit ​​grooves and less than or equal to the distance between the two snap-fit ​​parts, so that the snap-fit ​​part can be separated from the snap-fit ​​groove through the disassembly positions.

Images