Nail abutting seat, switching tool and surgical instrument
By designing a swingable anvil, the problem of switching surgical instruments during intra-abdominal surgery was solved, enabling the switching of the same instrument under different operating conditions, thus reducing medical costs and the number of instruments required.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU KEMAN MEDICAL TECHNOLOGY CO LTD
- Filing Date
- 2025-01-20
- Publication Date
- 2026-04-28
AI Technical Summary
Existing surgical instruments require frequent switching between straight-end and curved-end instruments during intra-abdominal surgery, leading to increased consumables and higher medical costs.
Design an anvil seat that allows the swinging component to switch between an initial position and a swinging position relative to the anvil base, and uses a limiting structure to maintain different operating states, thereby achieving tissue cutting, anastomosis, tissue retraction and separation without the need for additional consumables.
It reduces the types and costs of instruments, increases operational flexibility, adapts to different surgical needs, and lowers medical costs.
Smart Images
Figure CN224166347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to an anti-pin seat, a switching tool, and a surgical instrument. Background Technology
[0002] Taking surgical instruments in the abdominal cavity as an example, due to the limited operating space, the operation of instruments is relatively less flexible. In particular, when doctors are freeing blood vessels, they need to use instruments with a certain curvature at the end, which makes it easier for doctors to lift the blood vessels and bring them together and separate them from other tissues.
[0003] However, the need for instruments with curved ends is not very frequent; surgeons often use straight instruments. To accommodate these two scenarios, surgeons switch between straight-end instruments and curved-end instruments during surgery. For example, straight-end instruments are used when closure and separation are not required, while curved-end instruments are used when they are. Alternatively, curved-end closure and separation components can be added to the ends of straight-end instruments. When closure and separation are required, these components are added to the straight-end instruments; when not, they are removed. Both of these solutions increase the cost of medical supplies, resulting in a significant increase compared to using straight-end instruments. Utility Model Content
[0004] In view of the above problems, this application provides an anvil, a switching tool, and a surgical instrument to solve at least one problem existing in the background art. By using the swinging member to swing relative to the anvil base at different positions, different operations such as tissue cutting, anastomosis, tissue gathering and separation can be performed using the same anvil without the need for additional consumables, thereby reducing the types and costs of instruments.
[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:
[0006] A first aspect of this application provides an anti-pin seat, the anti-pin seat comprising:
[0007] Anvil base; a connecting shaft is provided at one end of it;
[0008] The swing member has a bayonet at one end, which engages with the connecting shaft to allow the swing member to switch between an initial position and at least one swing position relative to the anti-pin base.
[0009] The limiting structure includes a first limiting part disposed on the anvil base and a second limiting part disposed on the swing member. Under the snap-fit action of the first limiting part and the second limiting part, the swing member can be at least maintained in the initial position or the swing position.
[0010] The initial position is used at least for tissue separation and blood vessel detachment, and the swing position is used for tissue retraction and separation; when the swing member is in the swing position, the angle between the swing member and the anvil base is greater than the angle between the swing member and the anvil base when the swing member is in the initial position.
[0011] Optionally, the swing position includes at least two; during the swinging process, the swing member can switch between at least two swing positions relative to the abutment base.
[0012] Optionally, the first limiting part includes a limiting shaft, and the second limiting part includes a limiting hole; or, the first limiting part includes a limiting hole, and the second limiting part includes a limiting shaft.
[0013] One of the limiting shafts is engaged in one of the limiting holes, the limiting hole including at least two engaging holes. During the movement of the limiting shaft within the limiting hole, it can engage in the engaging holes at different positions, so that the swing member can switch to different positions.
[0014] Optionally, the limiting hole further includes a shrinkage hole located between two adjacent snap-fit holes, and the two adjacent snap-fit holes are connected through the shrinkage hole.
[0015] The inner diameter of the shrinkage hole is smaller than the inner diameter of the snap-fit hole, so as to restrict the switching of the limiting shaft between different snap-fit holes;
[0016] The limiting shaft is interference-fitted with the shrinkage hole.
[0017] Optionally, at least two limiting shafts are provided on both sides of one end of the anvil base, and at least two limiting holes are provided on both sides of the end of the swing member opposite to the anvil base.
[0018] Optionally, the limiting hole is a blind hole or a through hole, and the shrinkage of part of the sidewall of the blind hole or through hole forms the shrinkage hole position.
[0019] Optionally, the limiting hole is a blind hole, and the limiting shaft is inserted into the limiting hole through the opening of the blind hole. The bottom wall of the blind hole has a protrusion protruding in the direction of the opening, and the protrusion and the side wall of the blind hole together form the contraction hole position.
[0020] Optionally, the anvil further includes a deformable cover that covers the outside of the connection between the swing member and the anvil base and deforms as the swing member swings.
[0021] A second aspect of this application provides a switching tool, the switching tool comprising:
[0022] Tool body;
[0023] A connecting portion is provided on the tool body, the connecting portion including a receiving groove for accommodating at least a portion of the swing member, the connecting portion being used to connect with the swing member of the anvil to drive the swing member to swing.
[0024] A third aspect of this application provides a surgical instrument, the surgical instrument including an anvil as described in any embodiment of the first aspect;
[0025] Or,
[0026] The surgical instrument includes an anvil as described in any embodiment of the first aspect; and a switching tool as described in any embodiment of the second aspect.
[0027] The anvil provided in this application embodiment has at least the following beneficial effects:
[0028] The anvil is divided into two parts: an anvil base and a swinging component. Utilizing the swinging component's ability to switch between an initial position and at least one swinging position relative to the anvil base, the component swings to the swinging position when retraction and separation operations are needed; when no retraction or separation operations are required, the swinging component returns to the initial position. At this point, the anvil base can perform tissue separation and blood vessel dissection operations as if it were a straight instrument. Furthermore, the connection between the swinging component and the anvil base means that the component can switch positions while maintaining this connection, eliminating the need for additional consumables. A single anvil base can be used to perform different operations such as tissue cutting, anastomosis, and tissue retraction and separation, reducing the variety and cost of instruments. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of the structure of the anvil seat when the swinging member is in the initial position according to some embodiments of this application;
[0031] Figure 2 This is a schematic diagram of the structure of the abutment seat when the swinging member is in one of the swinging positions according to some embodiments of this application;
[0032] Figure 3 This is a top view of the abutment seat when the swing member is in the initial position in one embodiment of this application;
[0033] Figure 4 for Figure 3 Cross-sectional view at point DD;
[0034] Figure 5 for Figure 3 Cross-sectional view at EE;
[0035] Figure 6 for Figure 4 Enlarged view at A4 in the middle;
[0036] Figure 7 This is a partial cross-sectional view of the abutment seat when the swing member is in one of the swing positions in another embodiment of this application;
[0037] Figure 8 for Figure 5 Enlarged view at A5 in the middle;
[0038] Figure 9 This is another partial cross-sectional view of the abutment seat when the swing member is in one of the swing positions in another embodiment of this application;
[0039] Figure 10 The connection between the anvil base and the swing component is different. Figure 7 Another perspective cross-sectional view;
[0040] Figure 11 The oscillating component is in one of the oscillating positions, and is in relation to... Figure 10 A partial structural cross-sectional view of the connection between the anvil base and the swinging component, taken from roughly the same perspective;
[0041] Figure 12 This is a schematic diagram of the structure of the anvil base in another embodiment of this application;
[0042] Figure 13 for Figure 9 A partial structural diagram of the front end of the center anvil base;
[0043] Figure 14 This is a schematic diagram of the structure of the swing member in another embodiment of this application;
[0044] Figure 15 This is a top view of the abutment seat when the swing member is in the initial position in another embodiment of this application;
[0045] Figure 16 for Figure 15Cross-sectional view at the FF section;
[0046] Figure 17 for Figure 15 Cross-sectional view at GG point;
[0047] Figure 18 for Figure 17 Enlarged view of A6 size;
[0048] Figure 19 for Figure 17 Cross-sectional view at HH;
[0049] Figure 20 This is a partial structural diagram of the front end of the anvil base in another embodiment of this application;
[0050] Figure 21 This is a schematic diagram of the structure of the swing member in another embodiment of this application;
[0051] Figure 22 This is a top view of the switching tool in another embodiment of this application;
[0052] Figure 23 for Figure 22 Cross-sectional view at point II;
[0053] Figure 24 for Figure 22 Cross-sectional view at point JJ;
[0054] Figure 25 for Figure 24 Cross-sectional view at point KK;
[0055] Figure 26 for Figure 24 Enlarged view at point A7 in the middle. Detailed Implementation
[0056] To make the technical solution and beneficial effects of this utility model more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.
[0057] In the description of this utility model, the terms "width", "thickness", "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limitations on this utility model.
[0058] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly include at least one of those features. In the description of this invention, "a plurality of" means at least two, such as two, three, etc.
[0059] In this utility model, unless otherwise explicitly defined, the terms "installed," "equipped with," "connected," "fixed," and "set up" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0060] Combination Figures 1 to 21 An example of the pin seat 100 is described below.
[0061] Combination Figure 1 and Figure 2 As shown, the anvil seat 100 of this embodiment includes an anvil base 110 and a swing member 120. The swing member 120 is connected to the anvil base 110 and can swing relative to the anvil base 110, so that the swing member 120 relative to the anvil base 110... Figure 1 The initial position shown and Figure 2 The swing positions shown can be switched; wherein the initial position is used for at least one of tissue separation and blood vessel detachment, and the swing position is used for tissue retraction and separation; the limiting structure 140 includes a first limiting part disposed on the anvil base 110 and a second limiting part disposed on the swing member 120, and under the cooperative action of the first limiting part and the second limiting part, the swing member 120 can be maintained at least in the initial position or the swing position.
[0062] The swing position can be one, two, three or more. Figure 2 Only one swing position is shown as an example.
[0063] When the swing member 120 is in the initial position, the anvil 100 has the same or substantially the same function as existing straight-end instruments. Compared to the initial position, when the swing member 120 is in the swing position, the angle between the swing member 120 and the anvil base 110 is smaller. In other words, when the swing member 120 swings to the swing position, the front end of the anvil 100 bends more, allowing for better retraction and separation operations.
[0064] The limiting structure 140 keeps the swing member 120 in the desired position and prevents it from changing position undesirably. The swing member 120 can only change position after the external force overcomes the limiting effect of the limiting structure 140.
[0065] The anvil 100 is divided into two parts: an anvil base 110 and a swingable swing member 120. The overall length of the anvil 100 is not increased. For example, when the swing member 120 is in the initial position, the length of the anvil 100 is approximately 100-105 cm, and the width is approximately 10-12 cm. In a specific example, the length of the anvil 100 is approximately 104 cm, and the width is approximately 12 cm.
[0066] The swing member 120 has a concave arc surface and its width gradually decreases towards the front end. When in the swing position, the front end of the swing member 120 can pass through the gap between the target tissue and other tissues, thereby achieving the convergence and separation of the tissue.
[0067] Utilizing the switchable nature of the swing element 120 relative to the anvil base 110 between an initial position and at least one swinging position, the swing element 120 is swung to the swinging position when retraction and separation operations are required; when retraction and separation operations are not required, the swing element 120 is returned to the initial position. At this time, the anvil base 100 can perform tissue separation and blood vessel dissociation operations as if it were a straight instrument. Moreover, the connection between the swing element 120 and the anvil base 110 means that the swing element 120 can switch positions while maintaining its connection with the anvil base 110, without increasing consumables. Different operations such as tissue cutting, anastomosis, tissue retraction, and separation can be performed using the same anvil base 100, reducing the types of instruments and costs.
[0068] For example, the limiting structure 140 may include, but is not limited to, a snap-fit structure. For instance, it may also be implemented using ratchet pawls, electric limiting mechanisms, or other similar methods.
[0069] The switching of the position of the swing member 120 includes: the swing member 120 being switchable between an initial position and any swing position, and when there are at least two swing positions, the swing member 120 being able to switch between at least two swing positions relative to the abutment base 110 during the swinging process.
[0070] In some alternative embodiments, the position of the swing member 120 is different, and the included angle between the swing member 120 and the abutment base 110 is also different.
[0071] contrast Figure 1 and Figure 2When the swing member 120 is in the initial position, the angle between the swing member 120 and the pin base 110 is greater than the angle between the swing member 120 and the pin base 110 when the swing member 120 is in any swing position.
[0072] When there are at least two swing positions, the swing member 120 is in different swing positions, and the included angle between the swing member 120 and the anvil base 110 is also different. In this way, by swinging the swing member 120, the degree of bending of the front end of the anvil base 100 can be adjusted, which can adapt to the contraction and separation of tissues under different conditions, which not only makes operation and use more convenient, but also further expands the function of the anvil base 100.
[0073] The swinging component 120 and the anti-pin base 110 can be connected by a hinge, a shaft, or a flexible component to achieve the swinging motion. However, it is not limited to these methods. The following is a detailed explanation using a shaft connection as an example:
[0074] In some alternative embodiments, such as Figure 6 and Figure 7 As shown, the anvil base 100 also includes a deformable cover 130, which covers the outside of the connection between the swing member 120 and the anvil base 110 and deforms as the swing member 120 swings.
[0075] The cover 130 is used to prevent tissue from entering the gap between the swing member 120 and the anvil base 110, which would cause the swing member 120 to swing inflexibly. The deformability of the cover 130 can adapt to the swing of the swing member 120, so that it deforms synchronously with the swing of the swing member 120.
[0076] The thickness of the covering 130 is relatively thin, and it can be specifically a covering film.
[0077] In some alternative embodiments, the cover 130 includes a silicone sleeve fitted at the junction of the swing member 120 and the abutment base 110.
[0078] In addition to silicone, the cover 130 can also be made of other materials that are harmless to living organisms (such as the human body).
[0079] Specifically, the first limiting part 140 includes a limiting shaft 144 (e.g., Figure 13 The second limiting part 140 includes a limiting hole 145 (e.g., Figure 14 ),like Figure 8 and Figure 9 As shown, a limiting shaft 144 is inserted into a limiting hole 145. The limiting hole 145 includes at least two locking holes 1451. During the movement of the limiting shaft 144 within the limiting hole 145, it can be inserted into the locking holes 1451 at different positions, so that the swing member 120 can switch to different positions.
[0080] Figure 8 , 9 In the implementation shown in Figure 14, a limiting hole 145 includes two snap-fit holes 1451, and the limiting shaft 144 can move between the two snap-fit holes 1451. Figure 8 As shown, when the limiting shaft 144 is engaged in one of the snap-fit holes 1451, the swing member 120 is in its initial position, the angle between the swing member 120 and the anvil base 110 is relatively large, and the front end of the anvil base 100 is only slightly bent. Figure 9 As shown, when the limiting shaft 144 is engaged in another locking hole 1451, the swing member 120 is in a swing position, the angle between the swing member 120 and the anvil base 110 becomes smaller, and the degree of bending of the front end of the anvil base 100 increases.
[0081] In some alternative embodiments, a limiting hole 145 may include three, four or more snap-fit holes 1451, so that the swing member 120 can switch between at least two swing positions in addition to the initial position.
[0082] like Figure 10 , 11 and Figure 13 As shown, the limiting shaft 144 and the anvil base 110 are an integral component. In other embodiments, the limiting shaft 144 and the anvil base 110 are two separate components, and the limiting shaft 144 is fixed to the anvil base 110 by means of snap-fit, screws, adhesive, etc.
[0083] In an implementation not illustrated in this application, the positions of the limiting hole 145 and the limiting shaft 144 can be interchanged. Specifically, the first limiting part 140 includes the limiting hole 145, and the second limiting part 140 includes the limiting shaft 144; one limiting shaft 144 is engaged in one limiting hole 145, and the limiting hole 145 includes at least two engaging holes 1451. During the movement of the limiting shaft 144 within the limiting hole 145, it can engage in different engaging holes 1451, so that the swing member 120 can switch to different positions.
[0084] In some alternative embodiments, such as Figure 8 , 9 and Figure 14 As shown, the limiting hole 145 also includes a shrinkage hole 1452 located between two adjacent snap-fit holes 1451, and the two adjacent snap-fit holes 1451 are connected through the shrinkage hole 1452; the inner diameter of the shrinkage hole 1452 is smaller than the inner diameter of the snap-fit hole 1451, so as to limit the switching of the limiting shaft 144 between different snap-fit holes 1451.
[0085] When the limiting shaft 144 moves between the two snap-fit holes 1451, it must pass through the contraction hole 1452. The contraction hole 1452, with its smaller inner diameter than the snap-fit holes 1451, provides resistance to the limiting shaft 144, making it difficult for it to move. A significant force must be overcome to achieve the position switching of the swing member 120. The contraction hole 1452 provides a "positional sense" for the swing member 120 and effectively prevents unwanted position switching.
[0086] In some alternative embodiments, the limiting shaft 144 is interference-fitted with the shrinkage hole 1452.
[0087] For example, the inner diameter of the snap-fit hole 1451 is greater than or equal to the outer diameter of the limiting shaft 144, and the inner diameter of the shrinkage hole 1452 is less than the outer diameter of the limiting shaft 144.
[0088] In some alternative embodiments, such as Figure 8 , 9 and Figure 13 As shown, two limiting shafts 144 are respectively provided on both sides of one end of the anvil base 110, such as... Figure 8 , 21 and Figure 14 As shown, the swing member 120 and the anvil base 110 are respectively provided with two limiting holes 145 on both sides of the end opposite to each other.
[0089] The number of limiting shafts 144 is at least two, and the number of limiting holes 145 is also at least two. For example, in some implementations, the number of limiting shafts 144 can also be three, four, or more. Similarly, the number of limiting holes 145 can also be three, four, or more.
[0090] The combination of at least two limiting shafts 144 and at least two limiting holes 145 can improve the limiting effect on the swing member 120, so that the swing member 120 is more firmly held in the desired position.
[0091] In this embodiment, the limiting shaft 144 is not located at the front end of the abutment base 110, but is located on both sides of its front end, with at least two limiting shafts 144 on each side.
[0092] At least two limiting holes 145 are distributed at intervals around the swing center of the swing member 120.
[0093] In some alternative embodiments, such as Figure 14 As shown, part of the sidewall of the limiting hole 145 contracts to form a contraction hole position 1452.
[0094] If a limiting hole 145 includes two snap-fit holes 1451, such as Figure 14As shown, the limiting hole 145 is generally oblong in shape. If a limiting hole 145 includes two or more snap-fit holes 1451, then each pair of adjacent snap-fit holes 1451 and the constriction hole 1452 between them form an oblong shape.
[0095] In this embodiment, the limiting hole 145 is a blind hole or a through hole.
[0096] In one specific embodiment, the swing member 120 is connected to the anvil base 110 and is swingable relative to the anvil base 110, so that the swing member 120 is switchable between an initial position and at least one swing position relative to the anvil base 110; the initial position is used at least for tissue separation and blood vessel mobilization, and the swing position is used for tissue retraction and separation; under the action of the limiting structure 140, the swing member 120 can be maintained at least in the initial position or the swing position. Figures 15 to 21 As shown, the shrinkage hole position 1452 of the limiting hole 145 is formed in a different way.
[0097] like Figure 19 and Figure 21 As shown, the limiting hole 145 is a blind hole. The limiting shaft 144 is inserted into the limiting hole 145 through the opening 1453 of the blind hole. The bottom wall of the blind hole has a protrusion 146 protruding in the direction of the opening 1453. The protrusion 146 and the side wall of the blind hole together form a contraction hole position 1452.
[0098] When the limiting shaft 144 moves to the position of the protrusion 146, it will have an interference fit with the shrinkage hole 1452, so as to realize the positional sense of the swinging part 120 during the swinging process.
[0099] by Figure 18 Taking the limiting hole 145 with two snap-fit holes 1451 as an example, the limiting hole 145 in this embodiment is no longer an oblong hole, and the distance between the relative hole sidewalls at different positions is approximately equal.
[0100] In a specific implementation Figures 22 to 26 An exemplary structural diagram of the switching tool 200 is shown.
[0101] like Figure 25 and Figure 26 As shown, the switching tool 200 provided in this embodiment includes: a tool body and a connecting part. The connecting part is disposed on the tool body and is used to connect with the swing member 120 of the anchor seat 100 in any of the above embodiments to drive the swing member 120 to swing.
[0102] Although the oscillating component 120 can be manually repositioned without the need for the switching tool 200, its surface becomes contaminated after entering the body, making manual repositioning inconvenient. Furthermore, the oscillating component 120 is relatively small, and the latch between it and the anvil base 110 is quite tight, making manual operation difficult. Using the switching tool 200 allows for a more effortless repositioning of the oscillating component 120.
[0103] The switching tool 200 can be disposable or reused after cleaning and disinfection.
[0104] refer to Figure 26 As shown, in some alternative embodiments, the joint includes a receiving groove 210 that accommodates at least a portion of the swing member 120.
[0105] from Figure 23 and Figure 24 As can be seen, the switching tool 200 is roughly a long rod-shaped structure. The receiving groove 210 is located at one end of the switching tool 200. After inserting the front end of the swing member 120 into the receiving groove 210, an external force can be applied to the other end of the switching tool 200, making it easier to switch the position of the swing member 120.
[0106] This utility model also provides a surgical instrument, which includes the anvil 100 described in any of the foregoing embodiments.
[0107] Alternatively, the surgical instrument may include the anvil 100 and switching tool 200 as described in any of the foregoing embodiments.
[0108] The surgical instruments in this application include, but are not limited to, staplers, and their uses are not limited to abdominal surgery; they can also be used in other surgeries such as gynecology, pediatrics, and thoracic surgery.
[0109] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
[0110] In the description of this specification, references to "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. An anvil, characterized in that, The anvil includes: Anvil base; a connecting shaft is provided at one end of it; The swing member has a latch at one end, which engages with the connecting shaft, so that the swing member can be switched between an initial position and at least one swing position relative to the anti-pin base. The limiting structure includes a first limiting part disposed on the anvil base and a second limiting part disposed on the swing member. Under the snap-fit action of the first limiting part and the second limiting part, the swing member can be at least maintained in the initial position or the swing position. The initial position is used at least for tissue separation and blood vessel detachment, and the swing position is used for tissue retraction and separation; when the swing member is in the swing position, the angle between the swing member and the anvil base is greater than the angle between the swing member and the anvil base when the swing member is in the initial position.
2. The anvil according to claim 1, characterized in that, The swing position includes at least two; during the swinging process, the swing member can switch between at least two swing positions relative to the anti-pin base.
3. The anvil according to claim 2, characterized in that, The first limiting part includes a limiting shaft, and the second limiting part includes a limiting hole, or the first limiting part includes a limiting hole, and the second limiting part includes a limiting shaft; One of the limiting shafts is engaged in one of the limiting holes, the limiting hole including at least two engaging holes. During the movement of the limiting shaft within the limiting hole, it can engage in the engaging holes at different positions, so that the swing member can switch to different positions.
4. The anvil according to claim 3, characterized in that, The limiting hole also includes a shrinkage hole located between two adjacent snap-fit holes, and the two adjacent snap-fit holes are connected through the shrinkage hole. The inner diameter of the shrinkage hole is smaller than the inner diameter of the snap-fit hole, so as to restrict the switching of the limiting shaft between different snap-fit holes; The limiting shaft is interference-fitted with the shrinkage hole.
5. The anvil according to claim 4, characterized in that, At least two limiting shafts are provided on both sides of one end of the anvil base, and at least two limiting holes are provided on both sides of the end of the swing member opposite to the anvil base.
6. The anvil according to claim 4 or 5, characterized in that, The limiting hole is a blind hole or a through hole, and the shrinkage of part of the sidewall of the blind hole or through hole forms the shrinkage hole position.
7. The anvil according to claim 4 or 5, characterized in that, The limiting hole is a blind hole. The limiting shaft is inserted into the limiting hole through the opening of the blind hole. The bottom wall of the blind hole has a protrusion protruding in the direction of the opening. The protrusion and the side wall of the blind hole together form the contraction hole position.
8. The anvil according to any one of claims 1-5, characterized in that, The anvil also includes a deformable cover that covers the outside of the connection between the swing member and the anvil base and deforms as the swing member swings.
9. A switching tool, characterized in that, The switching tool includes: Tool body; A connecting portion is disposed on the tool body, the connecting portion including a receiving groove for accommodating at least a portion of the swing member, the connecting portion being used to connect with the swing member of the anvil seat according to any one of claims 1-8 to drive the swing member to swing.
10. A surgical instrument, characterized in that, The surgical instrument includes the anvil according to any one of claims 1-8; or The surgical instrument includes the anvil according to any one of claims 1-8 and the switching tool according to claim 9.