Suturing device
By incorporating upper and lower clamps in the suturing device and utilizing the closing action of the anvil and the staple cartridge base, automatic clamping and dragging of tissues are achieved, solving the problem of tissue displacement during rectal cancer surgery and improving the stability and efficiency of the operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-03-17
AI Technical Summary
In rectal cancer surgery, especially in obese patients with limited pelvic space, existing suturing devices are insufficient to effectively prevent tissue displacement, which increases the difficulty of the surgery and may lead to postoperative tumor recurrence and anastomotic leakage.
A suturing device was designed, comprising a staple cartridge base and a staple anchor. By setting an upper clamp and a lower clamp on the staple cartridge base, and utilizing the closing action of the staple anchor and the staple cartridge base, the device can automatically clamp and drag the tissue, ensuring the stability of the tissue during the suturing process.
It effectively prevents tissue displacement, reduces surgical difficulty, shortens surgical time, reduces the risk of postoperative tumor recurrence, and reduces the possibility of anastomotic leakage.
Smart Images
Figure CN223994928U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a suturing device. Background Technology
[0002] During rectal cancer surgery with sphincter preservation, given the limited space in the pelvic cavity, especially in obese patients, surgeons aim for instruments with jaws capable of holding the tissue firmly and providing sufficient clamping force to counteract the thrust generated during cutting, ensuring that the tissue does not move unexpectedly during anastomosis.
[0003] In related techniques, friction is often increased by increasing the clamping force of instruments or adding anti-slip structures to the surface of the staple cartridge to prevent tissue movement. However, these methods are passive. The most effective approach is to use two grasping forceps to clamp the tissue and drag it towards the bottom of the jaws, maintaining this dragging motion throughout the anastomosis process. This effectively solves the problem of tissue displacement. However, this operation requires additional assistance from the surgeon, and in narrow areas such as the low rectum, there may not be enough space to operate the grasping forceps. Furthermore, these techniques are prone to postoperative tumor recurrence or require multiple closures and cuts, and are also prone to postoperative anastomotic leakage, failing to meet the requirements for use.
[0004] Therefore, how to improve the applicability of suture devices is a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0005] The purpose of this invention is to provide a suturing device that can effectively prevent tissue displacement and reduce the difficulty of surgery.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A suturing device, comprising:
[0008] Driven main body;
[0009] A staple cartridge base is connected to the drive body; a staple cartridge is installed on the staple cartridge base, an upper clamping head is provided near the end of the staple cartridge, and a lower clamping head adapted to the upper clamping head is provided on the staple cartridge base;
[0010] An anvil is movably disposed on the staple cartridge base, and the driving body is capable of driving the anvil to close relative to the staple cartridge base, so that the anvil pushes the upper jaw to press against the lower jaw.
[0011] On the other hand, the upper clamp head includes a fixing part, an inclined part, and a clamp head. The fixing part is connected to the staple cartridge, the inclined part is connected between the fixing part and the clamp head, and the clamp head is suspended above the staple cartridge.
[0012] On the other hand, the upper clamp head is an integral structure and is fixed to the staple cartridge.
[0013] On the other hand, the inclined part is a metal spring piece, and both the upper jaw and the lower jaw have a serrated structure on the side that is close to each other.
[0014] On the other hand, the staple cartridge has a suture section on the front and rear sides, a suture notch in the middle, and a plurality of suture staples in the suture section.
[0015] On the other hand, the anvil seat has an anvil tooth on the side near the nail cartridge, and the nail cartridge has a nail cartridge tooth on the side near the anvil seat. After the anvil seat is closed relative to the nail cartridge base, the anvil tooth engages with the nail cartridge tooth.
[0016] On the other hand, the staple cartridge base is also provided with a guide groove, and the staple abutment is installed on the staple cartridge base through the guide groove. The guide groove is inclined from front to back in a direction away from the staple abutment, so that when the staple cartridge base moves toward the driving body, the staple abutment moves forward relative to the staple cartridge base.
[0017] On the other hand, the driving body includes a gripping component, a push tube, and a linkage component. The linkage component is located inside the push tube. Both ends of the linkage component are connected to the gripping component and the staple cartridge base, respectively. The gripping component is provided with a closing handle. The closing handle can drive the linkage component to move and pull the staple seat to move.
[0018] On the other hand, the anvil seat is provided with a boss on the side near the push tube. When the staple cartridge base moves toward the push tube, the push tube abuts against the boss and pushes the anvil seat to close relative to the staple cartridge base.
[0019] On the other hand, the upper jaw includes a first upper jaw and a second upper jaw, and the lower jaw includes a first lower jaw and a second lower jaw. The first upper jaw and the second upper jaw are respectively located on the left and right sides of the staple cartridge, and the first lower jaw and the second lower jaw are respectively located on the left and right sides of the staple cartridge base. The first upper jaw is adapted to the first lower jaw, and the second upper jaw is adapted to the second lower jaw.
[0020] The suturing device provided by this utility model includes: a driving body; a staple cartridge base connected to the driving body; a staple cartridge mounted on the staple cartridge base, an upper clamp head provided proximal to the staple cartridge, and a lower clamp head adapted to the upper clamp head provided on the staple cartridge base; and a staple anchor seat movably disposed on the staple cartridge base, wherein the driving body can drive the staple anchor seat to close relative to the staple cartridge base, so that the staple anchor seat pushes the upper clamp head to press against the lower clamp head. The suturing device provided by this utility model, by providing an upper clamp head proximal to the staple cartridge and a corresponding lower clamp head on the staple cartridge base, and by pushing the upper clamp head to press against the lower clamp head when the staple anchor seat closes with the staple cartridge base, allows rectal tissue and other tissues entering between the staple anchor seat and the staple cartridge base to be automatically clamped by the upper and lower clamp heads, effectively preventing tissue displacement and ensuring stable suturing. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 A schematic diagram of a specific embodiment of the sewing device provided by this utility model;
[0023] Figure 2 This is a schematic diagram showing the arrangement of the upper and lower clamps in the sewing device provided by this utility model;
[0024] Figure 3-1 for Figure 2 Front view of the staple cartridge in the suture device shown;
[0025] Figure 3-2 for Figure 2 A top view of the staple cartridge in the suture device shown;
[0026] Figure 4-1 for Figure 2 Front view of the staple cartridge base in the suture device shown;
[0027] Figure 4-2 for Figure 2 A top view of the staple cartridge base in the suture device shown;
[0028] Figure 5 for Figure 2 A schematic diagram of the anvil in the suture device shown;
[0029] Figure 6 This is a schematic diagram of the sewing device provided by this utility model in use.
[0030] Figure 7 To adopt Figure 2 A schematic diagram of the rectum sutured by the suture device shown and the tubular anastomosis device;
[0031] Figure label:
[0032] 1. Anchor seat, 2. Staple cartridge, 3. Staple cartridge base, 4. Firing button, 5. Closing handle, 6. Tubular stapler, 7. Push tube;
[0033] 1-1 Anvil tooth, 1-2 Boss, 1-3 Limiting shaft, 2-1 Upper clamp head, 2-2 Sealing staple; 3-1 Lower clamp head, 3-2 Staple cartridge tooth, 3-3 Guide groove;
[0034] a-1 Suture opening, a-2 Suture notch, a-3 Rectal tissue. Detailed Implementation
[0035] The core of this invention is to provide a suturing device that can shorten the operation time and facilitate the subsequent suturing of the tubular stapler.
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] To address the issue of tissue displacement during surgery in related technologies, this application provides a suturing device that reduces surgical difficulty. This suturing device is primarily designed for low rectal suturing operations and can automatically clamp and drag tissues during the suturing process, effectively preventing tissue displacement. Both the staple cartridge base 3 and the anvil 1 are equipped with a wave-shaped toothed structure, which can accommodate more rectal tissue a-3, allowing more rectal tissue a-3 to be laid flat between the staple cartridge 2 and the anvil 1, making it easier to cut and anastomose tissues. The staple cartridge 2 does not have suture staples 2-2 in the middle part. After suturing the rectal tissue a-3, a suture opening a-1 will be left in the middle of the rectum, which is more conducive to the entry of the tubular stapler 6. This reduces the need for re-puncturing the suture site after rectal suturing, effectively shortening the operation time, reducing the risk of postoperative tumor recurrence, and preventing postoperative anastomosis leakage, thus meeting the usage requirements.
[0038] Please refer to Figures 1 to 7 , Figure 1 A schematic diagram of a specific embodiment of the sewing device provided by this utility model; Figure 2 This is a schematic diagram showing the arrangement of the upper clamp head 2-1 and the lower clamp head 3-1 in the sewing device provided by this utility model; Figure 3-1 for Figure 2 Front view of staple cartridge 2 in the suture device shown; Figure 3-2 for Figure 2 Top view of staple cartridge 2 in the suture device shown; Figure 4-1 for Figure 2 Front view of staple cartridge base 3 in the suture device shown; Figure 4-2 for Figure 2 Top view of staple cartridge base 3 in the suture device shown; Figure 5 for Figure 2 A schematic diagram of the anvil 1 in the suture device shown; Figure 6 This is a schematic diagram of the sewing device provided by this utility model in use. Figure 7 To adopt Figure 2 A schematic diagram of the rectum sutured by the suture device shown and the tubular anastomosis device 6.
[0039] In this embodiment, the suturing device includes:
[0040] Driven main body;
[0041] The staple cartridge base 3 is connected to the drive body; the staple cartridge 2 is installed on the staple cartridge base 3, the upper clamp head 2-1 is provided at the proximal end of the staple cartridge 2, and the lower clamp head 3-1 is provided on the staple cartridge base 3 to match the upper clamp head 2-1;
[0042] An anvil 1 is movably disposed on the staple cartridge base 3, and the driving body can drive the anvil 1 to close relative to the staple cartridge base 3, so that the anvil 1 pushes the upper clamp head 2-1 to press against the lower clamp head 3-1.
[0043] Specifically, the drive unit generally includes a transmission mechanism for controlling the movement of the staple cartridge base 3. The drive unit is equipped with a handle, switch, and other structures. By triggering the corresponding mechanism, the staple cartridge base 3 is moved, thereby causing the anvil 1 to close or open relative to the staple cartridge base 3. For example, the drive unit has a firing button 4 and a closing handle 5. By operating the firing button 4, the suture staples 2-2 suture the tissue; by operating the closing handle 5, the anvil 1 closes relative to the staple cartridge base 3. The staple cartridge 2 is mounted on the staple cartridge base 3, and the staple cartridge 2 has suture staples 2-2. The suture staples 2-2 are typically made of stainless steel, titanium alloy, or medical-grade polyester material, and are designed in a hook or staple shape to penetrate and fix tissue. It should be noted that the staple cartridge base 3 and the anvil 1 are located at the front end of the drive unit; that is, the front end is the end closer to the tissue, and the rear end is the end closer to the drive unit.
[0044] This suturing device features an upper clamp head 2-1 located near the proximal end of the staple cartridge 2, and a lower clamp head 3-1 corresponding to the upper clamp head 2-1 located on the staple cartridge base 3. When the anvil 1 and the staple cartridge base 3 are closed, the upper clamp head 2-1 is pushed to press the lower clamp head 3-1. During the process of the upper clamp head 2-1 and the lower clamp head 3-1 closing the tissue, they can engage with each other and drag the tissue into the clamp jaws. This allows tissues such as the rectum that have entered between the anvil 1 and the staple cartridge base 3 to be automatically clamped by the upper clamp head 2-1 and the lower clamp head 3-1, effectively preventing tissue displacement and ensuring the stability of the suturing process.
[0045] In some embodiments, the upper clamp head 2-1 includes a fixing part, an inclined part, and a clamp head. The fixing part is connected to the staple cartridge 2, and the inclined part is connected between the fixing part and the clamp head. The extension direction of the clamp head is parallel to the extension direction of the staple cartridge 2 to facilitate tissue clamping. The clamp head is suspended above the staple cartridge 2. Specifically, in the initial state, i.e. when the anvil 1 is open, the clamp head is attached to the inner surface of the anvil 1. When the anvil 1 is closed relative to the staple cartridge base 3, it will push the clamp head toward the staple cartridge base 3 until the clamp head of the upper clamp head 2-1 clamps with the lower clamp head 3-1. When there is tissue such as rectum between the anvil 1 and the staple cartridge base 3, the clamping of the clamp head of the upper clamp head 2-1 and the lower clamp head 3-1 can clamp the tissue.
[0046] In some embodiments, the upper clamp head 2-1 is an integral structure with high strength and easy processing. The upper clamp head 2-1 is fixed on the nail cartridge 2 and can be connected by welding or integrally processed on the nail cartridge 2.
[0047] In some embodiments, the inclined portion is a metal spring sheet portion, which can improve the elastic deformation capacity and increase the service life; furthermore, in order to improve the clamping effect of the upper jaw 2-1 and the lower jaw 3-1 on the tissue, the upper jaw 2-1 and the lower jaw 3-1 are provided with a serrated structure on the side of each other to increase the friction between them and the tissue.
[0048] In some embodiments, the staple cartridge 2 has suture sections on its front and rear sides, and a suture notch a-2 in the middle of the staple cartridge 2. The suture section has a plurality of suture staples 2-2. That is, the staple cartridge 2 only has suture staples 2-2 on its front and rear sides, and no suture staples 2-2 in the middle, so that a suture notch a-2 is formed in the middle of the rectal opening. This is to facilitate the subsequent insertion of the tubular stapler 6 into the suture notch a-2. The usage of the tubular stapler 6 can be referred to in the relevant technology, and will not be repeated here.
[0049] In some embodiments, the anvil 1 is provided with an anvil tooth 1-1 on the side near the staple cartridge 2, and the staple cartridge 2 is provided with a staple cartridge tooth 3-2 on the side near the anvil 1. After the anvil 1 is closed relative to the staple cartridge base 3, the anvil tooth 1-1 engages with the staple cartridge tooth 3-2. By setting the anvil tooth 1-1 and the staple cartridge tooth 3-2, the area of the rectum being clamped can be increased, and the stability of cutting and suturing can be improved.
[0050] In some implementations, such as Figure 2 As shown, the staple cartridge base 3 is also provided with a guide groove 3-3. The anvil 1 is mounted on the staple cartridge base 3 through the guide groove 3-3, and the guide groove 3-3 is inclined from front to back in a direction away from the anvil 1, so that when the staple cartridge base 3 moves toward the push tube 7 of the driving body, the anvil 1 moves forward relative to the staple cartridge base 3. Specifically, the anvil 1 is provided with a limiting shaft 1-3, which is inserted into the limiting groove and can slide within the limiting groove. Under the constraint of the guide groove 3-3, when the anvil 1 is closed relative to the staple cartridge base 3, the limiting shaft 1-3 will move toward the staple cartridge base 3. Figure 2 In the position shown, the limiting shafts 1-3 will move upward and forward simultaneously. Then, the stapling and stapler base 3 will move backward relative to the stapler base 1, which will drive the upper clamp head 2-1 and the lower clamp head 3-1 to move backward. This will generate a backward dragging action on the rectal tissue a-3, thereby improving the tissue clamping and dragging energy. This can greatly reduce the difficulty of surgery, improve the efficiency of surgery, and reduce the workload of doctors in the narrow pelvic space.
[0051] In some embodiments, the driving body includes a gripping component, a push tube 7, and a linkage component. The linkage component is located inside the push tube 7, and its two ends are respectively connected to the gripping component and the staple cartridge base 3. The gripping component is provided with a closing handle 5, which can drive the linkage component to move and pull the staple anchor 1 to move. That is, by pressing the gripping handle, the staple cartridge base 3 can be moved backward, and under the action of the push tube 7, the staple anchor 1 is driven to close, which is convenient for operation.
[0052] In some embodiments, the anvil 1 is further provided with a boss 1-2 on the side near the push tube 7. When the staple cartridge base 3 moves toward the push tube 7, the push tube 7 abuts against the boss 1-2 and pushes the anvil 1 to close relative to the staple cartridge base 3. The boss 1-2 facilitates the push tube 7 to drive the anvil 1 to close toward the staple cartridge base 3, thereby improving stability.
[0053] In some embodiments, the upper jaw 2-1 includes a first upper jaw 2-1 and a second upper jaw 2-1, and the lower jaw 3-1 includes a first lower jaw 3-1 and a second lower jaw 3-1. The first upper jaw 2-1 and the second upper jaw 2-1 are respectively located on the left and right sides of the staple cartridge 2, and the first lower jaw 3-1 and the second lower jaw 3-1 are respectively located on the left and right sides of the staple cartridge base 3. The first upper jaw 2-1 is adapted to the first lower jaw 3-1, and the second upper jaw 2-1 is adapted to the second lower jaw 3-1. Specifically, by setting at least two sets of upper jaw 2-1 and lower jaw 2-1, the clamping stability of the tissue can be improved. At the same time, the first upper jaw 2-1 and the second upper jaw 2-1 are respectively located on the left and right sides of the staple cartridge 2, and the first lower jaw 3-1 and the second lower jaw 3-1 are respectively located on the left and right sides of the staple cartridge base 3, which does not affect the movement of the cutting blade, making it convenient to use and simple in structure.
[0054] Specifically, in one embodiment, the suture device includes an anvil 1, a staple cartridge 2, a staple cartridge base 3, and a drive body; as shown Figures 2 to 5 As shown, the anvil seat 1 has anvil seat protrusions 1-1 on both sides of its edge. The staple cartridge base 3 is connected to the limiting groove of the anvil seat 1 through a cylindrical pin-shaped limiting shaft 1-3. The staple cartridge base 3 has two lower clamp heads 3-1 and staple cartridge protrusions 3-2 on both sides of its edge. The staple cartridge 2 is installed in the groove in the middle of the staple cartridge base 3. The staple cartridge 2 has an upper clamp head 2-1 and a suture staple 2-2. The suture staple 2-2 is distributed on both sides of the staple cartridge 2.
[0055] In specific implementation, such as Figure 6 As shown, the rectal tissue a-3 to be removed is placed between the anvil 1 and the staple cartridge 2. Driving the closing handle 5 pulls the staple cartridge base 3 backward. Under the action of the push tube 7, the anvil 1 begins to close. Guided by the guide groove 3-3, the staple cartridge 2 moves backward relative to the anvil 1. At the same time, the upper clamp head 2-1 of the staple cartridge 2, under the pressure of the anvil 1, contacts the lower clamp head 3-1 on the staple cartridge base 3, forming a closed tissue clamp, grasping the rectal tissue a-3 and moving it towards the anvil 1 and staple cartridge. The device moves within chamber 2; at this time, the anvil teeth 1-1 on both sides of the anvil 1 and the staple cartridge teeth 3-2 on both sides of the staple cartridge base 3 can mesh with each other, so that the rectal tissue a-3 exists in a wave-like form between the closed anvil 1 and staple cartridge 2, allowing more rectal tissue a-3 to be accommodated and increasing the cutting and suturing length of the rectal tissue a-3; since no suture staples 2-2 are distributed in the middle of staple cartridge 2, after the suturing device cuts and sutures the rectal tissue a-3 by pressing button 4, it will form a shape like... Figure 7As shown, the rectal tissue a-3 has suture openings a-1 on both sides and a suture gap a-2 in the middle. The tubular stapler 6 can directly suture the two sections of rectal tissue a-3 after cutting through the suture gap a-2 without having to puncture the suture opening a-1, thus shortening the operation time.
[0056] This suturing device can automatically clamp and drag the tissue during the suturing process, effectively preventing tissue displacement; it allows the rectal tissue a-3 to exist in the clamping jaws in a folded form, accommodating more rectal tissue a-3; after cutting the rectal tissue a-3, the rectal tissue a-3 incision has two states: suture opening a-1 and suture notch a-2, which is more conducive to the suturing of the rectal tissue a-3 by the tubular stapler 6, greatly shortening the operation time.
[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0058] The suturing device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.
Claims
1. A suturing device, characterized by, The utility model relates to a surgical stapler, including: Drive main part; Nail storehouse pedestal (3) are connected with drive main part; The nail storehouse (2) is installed on the nail storehouse pedestal (3), and the proximal end of the nail storehouse (2) is provided with an upper jaw (2-1), and the nail storehouse pedestal (3) is provided with a lower jaw (3-1) matched with the upper jaw (2-1); The nail abutting seat (1) is movably arranged on the nail storehouse pedestal (3), and the drive main part can drive the nail abutting seat (1) to close relative to the nail storehouse pedestal (3), so that the nail abutting seat (1) pushes the upper jaw (2-1) to compress the lower jaw (3-1).
2. The suturing device of claim 1, wherein, The upper jaw (2-1) includes a fixed part, an inclined part and a jaw part, the fixed part is connected to the nail storehouse (2), the inclined part is connected between the fixed part and the jaw part, and the jaw part is suspended above the nail storehouse (2).
3. The suturing device of claim 2, wherein, The upper jaw (2-1) is an integral structure, and the upper jaw (2-1) is fixed on the nail storehouse (2).
4. The suturing device of claim 2, wherein, The inclined part is a metal spring part, and the side of the upper jaw (2-1) and the lower jaw (3-1) close to each other is provided with a sawtooth structure.
5. The suturing device according to claim 1, wherein, The front and rear sides of the nail storehouse (2) are provided with a suture part, the middle part of the nail storehouse (2) is provided with a suture gap (a-2) part, and the suture part is provided with a plurality of suture nails (2-2).
6. The suturing device of claim 1, wherein, The side of the nail abutting seat (1) close to the nail storehouse (2) is provided with a nail abutting seat convex tooth (1-1), the side of the nail storehouse (2) close to the nail abutting seat (1) is provided with a nail storehouse convex tooth (3-2), and after the nail abutting seat (1) is closed relative to the nail storehouse pedestal (3), the nail abutting seat convex tooth (1-1) is engaged with the nail storehouse convex tooth (3-2).
7. The suturing device according to any one of claims 1 to 6, wherein The nail storehouse pedestal (3) is also provided with a guide groove (3-3), the nail abutting seat (1) is installed on the nail storehouse pedestal (3) through the guide groove (3-3), and the guide groove (3-3) is inclined from front to back towards the direction away from the nail abutting seat (1), so that when the nail storehouse pedestal (3) moves towards the drive main part, the nail abutting seat (1) moves forward relative to the nail storehouse pedestal (3).
8. The suturing device of claim 7, wherein, The drive main part includes a holding part, a push tube (7) and a linkage part, the linkage part is located inside the push tube (7), the two ends of the linkage part are connected with the holding part and the nail storehouse pedestal (3) respectively, the holding part is provided with a closing handle (5), the closing handle (5) can drive the linkage part to act and pull the nail abutting seat (1) to move.
9. The suturing device of claim 8, wherein, The side of the nail abutting seat (1) close to the push tube (7) is also provided with a boss (1-2), when the nail storehouse pedestal (3) moves towards the push tube (7), the push tube (7) abuts against the boss (1-2) and pushes the nail abutting seat (1) to close relative to the nail storehouse pedestal (3).
10. The suturing device according to any one of claims 1 to 6, wherein, The upper plier head (2-1) comprises a first upper plier head (2-1) and a second upper plier head (2-1), the lower plier head (3-1) comprises a first lower plier head (3-1) and a second lower plier head (3-1), the first upper plier head (2-1) and the second upper plier head (2-1) are respectively located on the left and right sides of the staple cartridge (2), the first lower plier head (3-1) and the second lower plier head (3-1) are respectively located on the left and right sides of the staple cartridge base (3); and the first upper plier head (2-1) is matched with the first lower plier head (3-1), and the second upper plier head (2-1) is matched with the second lower plier head (3-1).