An anastomat

Abstract

This invention provides a stapler. The stapler includes a distal end and a proximal end opposite each other along the axial direction of the stapler. The stapler includes: a handle portion; a sleeve assembly; a clamp body assembly; an axially movable cutting blade body with a protrusion protruding from the side of the cutting blade body; a blade assembly that moves along a first direction or in a direction opposite to the first direction under the drive of the cutting blade body. The first direction is the direction of axial movement towards the distal end of the stapler. The blade assembly includes a connecting portion, which includes a connecting end and a free end, the free end being adapted to the protrusion; and a mating portion, including a mating sidewall. The blade assembly is configured such that: in an initial state, the connecting portion is separated from the protrusion; and when the connecting portion moves along the first direction, it is pressed by the mating portion and connected to the protrusion. This invention provides a connecting portion on the blade assembly that laterally engages with the mating portion, which overcomes the risk of the blade assembly falling off during the retraction process and enables the cutting blade body to be reused.

Description

Technical Field

[0001] This utility model relates to medical devices, and more particularly to a stapler. Background Technology

[0002] In surgical treatment, various staplers are widely used. Currently, the various staplers used in clinical practice have advantages such as fast and accurate suturing, simple operation, less bleeding, and few side effects and surgical complications. They can be used to remove lesions, and therefore are widely used both domestically and internationally.

[0003] Anastomosis devices typically include a handle, a shaft assembly, and a clamp assembly. The clamp assembly includes an anvil and a stapler cartridge assembly. The stapler cartridge assembly may include a stapler cartridge and a cartridge holder, with the cartridge mounted on the cartridge holder. The cutting blade assembly is typically located within the shaft assembly and can be moved into the clamp assembly by the handle. Once the clamp assembly is engaged, the cutting blade assembly cuts the engaged tissue.

[0004] In existing staplers, the cutting blades are mostly reused, leading to reduced cutting performance and failure to meet requirements. Some existing staplers have a detachable connection between the cutting blade and the blade body; however, during the retraction process, due to an unreliable connection, the cutting blade can easily detach from the blade body, posing a danger. Utility Model Content

[0005] At least one embodiment of this utility model provides a stapler, including a distal end and a proximal end opposite to each other along the axial direction of the stapler. The stapler includes: a handle portion; a cannula assembly disposed at the distal end of the handle portion; a clamping body assembly that can be closed or opened disposed at the distal end of the cannula assembly; a cutting blade body movable along the axial direction disposed within the cannula assembly, wherein the cutting blade body has a protrusion protruding relative to the side of the cutting blade body; and a blade assembly disposed at the distal end of the cutting blade body, configured to move along a first direction or along a second direction opposite to the first direction under the drive of the cutting blade body, wherein the first direction is the direction of movement toward the distal end of the stapler along the axial direction. The blade assembly includes a connecting portion, the connecting portion comprising: a connecting end located at a distal end of the connecting portion and a free end located at a proximal end of the connecting portion, the free end being adapted to the protrusion; a mating portion including a mating sidewall configured to: when in contact with the connecting portion, apply pressure to the connecting portion to deflect the free end of the connecting portion toward the protrusion; wherein the blade assembly is configured such that: in an initial state, the connecting portion is separated from the protrusion to separate the blade assembly from the cutting blade body; and, when the connecting portion moves along the first direction, it is pressed by the mating portion and connected to the protrusion to detachably connect the blade assembly to the cutting blade body.

[0006] For example, in a stapler provided in at least one embodiment of the present invention, the blade assembly further includes a blade body portion, and the connecting end of the connecting portion forms a pivot connection with the blade body portion, such that the connecting portion deviates outward from the centerline of the stapler in the initial state and deflects inward when pressed by the mating portion.

[0007] For example, in a stapler provided in at least one embodiment of the present invention, the clamp assembly includes a staple cartridge assembly and a staple anvil, the staple cartridge assembly and the staple anvil are rotatable relative to each other, the staple cartridge assembly includes a staple cartridge seat and a staple cartridge detachably mounted on the staple cartridge seat; the staple cartridge includes the mating portion, the mating portion being located at the proximal end of the staple cartridge.

[0008] For example, in a stapler provided in at least one embodiment of the present invention, the staple cartridge assembly further includes a staple pusher slider, which is movable within the staple cartridge and configured to push the staples in the staple cartridge assembly; when the staple pusher slider is located at the proximal end of the staple cartridge assembly, the distal end of the blade assembly abuts against the staple pusher slider; the blade assembly and the staple pusher slider are configured to be driven by the cutting blade body to move along the first direction.

[0009] For example, in a stapler provided in at least one embodiment of the present invention, the blade assembly further includes a blade, a first base and a second base. The blade is disposed at the distal end of the blade body portion, and the first base and the second base are located on both sides of the blade body portion. Each of the first base and the second base includes a base and an inclined body extending obliquely from the base in a height direction perpendicular to the axial direction.

[0010] For example, at least one embodiment of the present invention provides a stapler that further includes an elastic element located between the connecting portion and the blade body portion. The connecting portion is located between the inclined body of one of the first base portion and the second base portion and the blade body portion. The elastic element applies an elastic force to the connecting portion, causing the connecting portion to deviate outward from the centerline of the stapler in the initial state and to deflect inward when the elastic element is pressed by the mating portion.

[0011] For example, in a stapler provided in at least one embodiment of the present invention, a first opening is provided on the connecting part, penetrating both sides of the connecting part. The first opening is configured to engage with the protrusion to achieve the connection when the connecting part moves along the first direction and is pressed by the mating part.

[0012] For example, in a stapler provided in at least one embodiment of the present invention, the pusher slider includes a slider body and a first pusher portion and a second pusher portion located on both sides of the slider body. When the distal end of the blade body portion abuts against the slider body, the first base portion is located between the first pusher portion and the slider body, the second base portion is located between the second pusher portion and the slider body, the distal end of the first base portion abuts against the first pusher portion, and the distal end of the second base portion abuts against the second pusher portion.

[0013] For example, in a stapler provided in at least one embodiment of the present invention, the mating part includes a first side plate, the first side plate including: the mating sidewall and an inclined side surface connected to the proximal end of the mating sidewall, wherein the inclined side surface is a side surface that is inclined outward relative to the axial direction.

[0014] For example, in a stapler provided in at least one embodiment of the present invention, the mating part further includes a second side plate, the space between the first side plate and the second side plate forms the main slide of the staple cartridge assembly, and the first side plate and the second side plate are axially symmetrical about the center line of the stapler.

[0015] For example, in a stapler provided in at least one embodiment of the present invention, the distal end of the connecting portion includes a curled portion, which is configured to curl toward the centerline of the stapler; the cutting blade body has a second opening that penetrates both sides of the cutting blade body and allows the curled portion to be inserted.

[0016] For example, in a stapler provided in at least one embodiment of the present invention, the handle portion includes a power unit configured to drive the cutting blade to move along the axial direction.

[0017] Compared with the prior art, the beneficial effects of at least one embodiment of the present invention include: by providing a connecting part on the blade assembly and laterally engaging with the mating part, the risk of the blade assembly falling off during the retraction process can be overcome, enabling the cutting blade to be reused. Furthermore, since the blade assembly is mounted on the staple cartridge, the blade assembly can be replaced simultaneously when replacing the staple cartridge, solving the drawback of the prior art where repeated use of the blade assembly causes the blade to dull and reduces cutting performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 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.

[0019] Figures 1-2 This is a partial structural schematic diagram of the anastomosis device provided in some embodiments of the present invention.

[0020] Figure 3 This is a schematic diagram of a cutting blade provided in some embodiments of the present invention.

[0021] Figure 4 This is a schematic diagram of a blade assembly provided in some embodiments of the present invention.

[0022] Figure 5 This is a schematic diagram illustrating the cooperation between the blade assembly and the push pin slider provided in some embodiments of this utility model.

[0023] Figure 6 This is a schematic diagram of a staple cartridge provided for some embodiments of the present invention.

[0024] Figures 7-8 This is a schematic diagram showing the state of the mating parts, connecting parts, and protrusions in some embodiments of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar words used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," and "lower" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0027] The accompanying drawings in this invention are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0028] The features "parallel," "perpendicular," and "identical" used in this invention include the strictly defined meanings of "parallel," "perpendicular," and "identical," as well as cases where "substantially parallel," "substantially overlapping," and "substantially identical" contain a certain degree of error. Taking into account measurement and errors associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "substantially" can mean within one or more standard deviations, and unless otherwise specified, can mean within 10% or 5% of the deviation of said value.

[0029] This research has revealed that in some existing staplers, the connection between the cutting blade and the firing mechanism is unreliable, and the cutting blade is prone to detachment. Firing refers to the process where the cutting blade moves from the proximal to the distal end when the stapler has completed tissue positioning. In other existing staplers, the cutting blade is often reused. After repeated use, the sharpness of the cutting edge decreases rapidly, resulting in the stapler's cutting performance failing to meet requirements.

[0030] In response, at least one embodiment of this utility model provides a stapler, including a distal end and a proximal end opposite to each other along the axial direction of the stapler. The stapler includes: a handle portion; a sleeve assembly disposed at the distal end of the handle portion; a clamping body assembly that can be closed or opened disposed at the distal end of the sleeve assembly; an axially movable cutting blade body disposed within the sleeve assembly, wherein the cutting blade body has a protrusion protruding relative to the side of the cutting blade body; and a blade assembly disposed at the distal side of the cutting blade body, configured to move along a first direction or along a second direction opposite to the first direction under the drive of the cutting blade body. The first direction is axially toward the stapler. The direction of movement of the distal end of the connector, the blade assembly includes a connecting portion, the connecting portion including: a connecting end located at the distal end of the connecting portion and a free end located at the proximal end of the connecting portion, the free end being adapted to a protrusion; a mating portion including a mating sidewall, the mating sidewall being configured to: when in contact with the connecting portion, apply pressure to the connecting portion to cause the free end of the connecting portion to deflect toward the protrusion; wherein the blade assembly is configured to: in an initial state, the connecting portion separates from the protrusion to separate the blade assembly from the cutting blade body; and, when the connecting portion moves along a first direction, be pressed by the mating portion and connected to the protrusion to detachably connect the blade assembly to the cutting blade body.

[0031] This invention overcomes the risk of the blade assembly detaching during the retraction process by providing a connecting part on the blade assembly and laterally engaging with the mating part, thus controlling the separation or connection between the blade assembly and the cutting blade body. Furthermore, the blade assembly is mounted on the staple cartridge, allowing for simultaneous replacement of the blade assembly when changing the cartridge. This solves the problem in existing technologies where repeated use of the blade assembly dulls the blade and reduces cutting performance.

[0032] In embodiments of this invention, the terms "proximal" (or "proximal side") and "distal" (or "distal side") are relative to the operator of the instrument. For example, the term "proximal" refers to the portion of a component or structure closer to the operator, the term "proximal" refers to the side of a component or structure closer to the operator, the term "distal" refers to the portion of a component or structure farther from the operator, and the term "proximal" refers to the side of a component or structure farther from the operator. The term "inner side" or "inward" refers to the side closer to the centerline of the device or component, and the term "outer side" or "outward" refers to the side farther from the centerline of the device or component. In embodiments of this invention, "axial" refers to the direction of the central axis of the device or component. It should be noted that these definitions are for convenience only and should not be construed as limitations of this invention.

[0033] The embodiments and examples of this utility model will now be described in detail with reference to the accompanying drawings.

[0034] Figures 1-2 This is a partial structural schematic diagram of the anastomosis device provided in some embodiments of the present invention.

[0035] For example, such as Figure 1 and Figure 2 As shown, at least one embodiment of the present invention also provides a stapler 1000 (also referred to as a stapler device), the stapler 1000 including a cannula assembly 200 and a handle portion (not shown in the figure), the handle portion including a power unit. The cannula assembly 200 is disposed at the distal end of the handle portion.

[0036] exist Figure 1 In the example, for the sake of clarity and brevity in this article, the axis of the stapler 1000 is marked as axis D1, which can be understood as the direction of extension of the entire stapler.

[0037] This invention also designates the direction of movement toward the distal end of the stapler in the axial direction D1 as the first direction D11, and marks the second direction D12 as the direction opposite to the first direction D11 in the axial direction D1, that is, the direction of movement toward the proximal end of the stapler.

[0038] This invention also designates a direction perpendicular to the first direction D1 as the height direction D2 (see below) Figure 4 (As shown). In the embodiments of this utility model, the height direction D2 refers to a direction perpendicular to the axis D1, and does not specifically refer to a direction perpendicular to the ground.

[0039] For example, such as Figure 1 and Figure 2As shown, the anastomosis device 1000 provided in at least one embodiment of the present invention includes a clamping body assembly 1, a cutting blade 2, and a cutting edge assembly 3. The clamping body assembly 1 is configured to be closable or openable and is disposed at the distal end of the cannula assembly 200. For example, the clamping body assembly 1 can be closed to clamp the target tissue or can be opened to release the target tissue. The cutting edge assembly 3 is used to cut the target tissue clamped by the clamping body assembly 1. The cutting blade 2 is disposed within the cannula assembly 200. The cutting edge assembly 3 is disposed distal to the cutting blade 2. The cutting blade 2 is configured to be movable along an axial direction D1, thereby driving the cutting edge assembly 3 to move to cut the target tissue clamped by the clamping body assembly 1.

[0040] In some examples, the handle of the anastomosis device 1000 includes a power unit configured to drive the cutting blade 2 to move along the axial direction D1, thereby driving the blade assembly 3 to cut the target tissue.

[0041] In some examples, the blade assembly 3 and the cutting blade body 2 are two separate parts, and the blade assembly 3 and the cutting blade body 2 can be detachably connected (for example, as can be seen below, the connecting portion 31 of the blade assembly 3 is away from the protrusion 21 of the cutting blade body 2 in the free state, and will connect with the protrusion 21 of the cutting blade body 2 when the connecting portion 31 of the blade assembly 3 is pressed by the mating portion 5). In embodiments of this utility model, the combination of the blade assembly 3 and the cutting blade body 2 can also be referred to as a cutting assembly.

[0042] For example, when the cutting blade 2 moves distally, it comes into contact with the proximal end of the blade assembly 3, thereby pushing the blade assembly 3 to move distally as well. When the cutting blade 2 moves proximally, the connection between the two (see below for details) pulls the blade assembly 3 proximally as well. Upon reaching the proximal end of the clamping body 1, the connection between the two fails, and the blade assembly 3 gradually detaches from the cutting blade 2. Thus, this invention allows the cutting blade 2 to be reused and the blade assembly 3 to be replaced.

[0043] Figure 3 This is a schematic diagram of a cutting blade provided in some embodiments of the present invention. Figure 4 This is a schematic diagram of a blade assembly provided in some embodiments of the present invention. Figure 5 This is a schematic diagram illustrating the cooperation between the blade assembly and the push pin slider provided in some embodiments of this utility model. Figure 6 This is a schematic diagram of a staple cartridge provided for some embodiments of the present invention. Figures 7-8 This is a schematic diagram illustrating the state of the mating parts, connecting parts, and protrusions in some embodiments of the present invention. Figure 7 This is a schematic diagram showing the connecting part 31 in a free state and separated from the protrusion 21. Figure 8 This is a schematic diagram showing the state of the connecting part 31 when it is pressed by the mating part 5.

[0044] For example, such as Figure 3 As shown, the cutting blade body 2 is provided with a protrusion 21 that protrudes relative to the side 22 of the cutting blade body 2. For example, the protrusion 21 may be integrally formed on the cutting blade body 2. Of course, this is only an example and is not a limitation of this utility model. For example, the protrusion 21 may also be a separate part and fixedly connected to the cutting blade body 2, which will not be described in detail here.

[0045] In some examples, the cutting blade body 2 is provided with a protrusion 21. This invention can provide a protrusion 21 on one side of the cutting blade body 2 (i.e., either of the two sides of the cutting blade body 2 in the third direction D3), where the third direction D3 is perpendicular to the axial direction D1 and perpendicular to the height direction D2. Of course, this is merely exemplary, and this invention does not limit it. For example, it can provide a protrusion 21 on each of the two sides, as long as one of the protrusions 21 mates with the mating part; this will not be elaborated upon here.

[0046] For example, such as Figures 1-2 As shown, the clamp assembly 1 includes a staple cartridge assembly 11 and a staple anvil 12, which are rotatable relative to each other. The staple cartridge assembly 11 includes a staple cartridge seat 111 and a staple cartridge 112 detachably mounted on the staple cartridge seat 111.

[0047] For example, the staple cartridge assembly 11 and the anvil 12 are configured to engage with each other to close the clamp assembly 1, and to move away from each other to open the clamp assembly 1. For instance, the staple cartridge assembly 11 is capable of pivoting relative to the anvil 12 about a closing axis.

[0048] For example, the anvil 12 could also be pivotable relative to the staple cartridge assembly 11, such as... Figure 1 As shown, the anvil 12 is capable of pivoting about a closed axis relative to the staple cartridge assembly 11.

[0049] The embodiments of this utility model are not limited in this respect, as long as the staple cartridge assembly 11 and the staple anvil 12 are movably connected to each other and can realize the closing or opening of the clamp assembly 1, which will not be described in detail here.

[0050] In embodiments of this invention, the cutting blade 2 also functions as a closing device, configured to move along the axial direction D1 to drive the clamp assembly 1 to close. For example, as Figure 3 As shown, the cutting blade 2 also includes a lower edge 23 and an upper edge 24. When the cutting blade 2 moves from the proximal end to the distal end, the lower edge 23 of the cutting blade 2 contacts the staple cartridge seat 111, and the upper edge 24 pivots the anvil 12 along the inclined surface of the anvil 12 until it is parallel to the staple cartridge seat 111, thereby completing tissue positioning.

[0051] For example, such as Figures 2-4As shown, the blade assembly 3 can be configured to move along a first direction D11 (i.e., from the proximal end to the distal end of the stapler 1000) or along a second direction D12 opposite to the first direction D11, driven by the cutting blade body 2. For example, when the cutting blade body 2 is driven to move distally, the cutting blade body 2 will contact the blade assembly 3, thereby driving the blade assembly 3 to move distally together.

[0052] For example, such as Figure 2 and Figure 5 As shown, the staple cartridge assembly 11 also includes a staple pusher slider 4, which is movable within the staple cartridge 112 and configured to push the staples in the staple cartridge 112. For example, as Figure 5 and Figure 6 As shown, the pusher slider 4 includes a slider body 41 and a first pusher portion 42 and a second pusher portion 43 located on both sides of the slider body 41. The slider body 41 is configured to move along the axial direction D1 in the intermediate slide 113 of the staple cartridge 112, wherein the intermediate slide 113 (also referred to as the main slide) is a slide located in the middle region of the staple cartridge 112 and extending along the axial direction D1. The first pusher portion 42 and the second pusher portion 43 move along the axial direction D1 to push out the staples located on both sides of the intermediate slide 113 of the staple cartridge 112.

[0053] For example, such as Figure 4 As shown, the blade assembly 3 includes a connecting portion 31. In some examples, the connecting portion 31 may be a sheet metal part that is integrally linear. Of course, this is merely exemplary and is not intended to limit the embodiments of this utility model.

[0054] For example, such as Figure 6 As shown, the stapler 1000 also includes a mating part 5. For example, the staple cartridge 112 may include the mating part 5, which is located at the proximal end of the staple cartridge 112.

[0055] In an embodiment of this utility model, the connecting portion 31 includes: a connecting end located at the distal end of the connecting portion 31 (e.g., the distal connecting end 311A ​​shown below) and a free end located at the proximal end of the connecting portion 31 (e.g., the proximal free end 311B shown below). For example, the free end is adapted to the protrusion 21.

[0056] For example, such as Figure 6 and Figure 7 As shown, the mating part 5 includes a mating sidewall 51, which is configured to apply pressure to the connecting part 31 when in contact with it, causing the free end of the connecting part 31 to deflect toward the protrusion 21 (i.e., the connecting part 31 deflects inward). In embodiments of this invention, "inward" means closer to the center line of the stapler, and "outward" means further away from the center line of the stapler.

[0057] In an embodiment of this utility model, the blade assembly 3 is configured such that, in the initial state, the connecting portion 31 is separated from the protrusion 21 (e.g., Figure 7 The connecting portion 31 shown initially deviates outward from the centerline of the stapler to separate the blade assembly 3 from the cutting blade body 2; and, when the connecting portion 31 moves along the first direction D11 and is pressed by the mating portion 5, it connects with the protrusion 21 (e.g., Figure 8 The mating part 5 is pressed against the protrusion 21 to allow the blade assembly 3 to be detachably connected to the cutting blade body 2. Therefore, since the connection between the connecting part 31 and the protrusion 21 is established, the cutting blade body 2 can be moved along the second direction D12, which pulls the blade assembly 3 to move together along the second direction D12 (i.e., the direction of blade return).

[0058] For example, the connecting part 31 and the protrusion 21 are connected by a separable snap-fit ​​mechanism.

[0059] This invention enables the blade assembly 3 to return to the proximal position of the staple cartridge 112 along with the cutting blade body 2 during retraction. Thus, because the blade assembly 3 returns to the proximal position of the staple cartridge assembly after firing, the safety of the patient and instrument operator is ensured despite the sharpness of the blade surface.

[0060] The above embodiments of this utility model, by providing a connecting part 31 on the blade assembly 3 and engaging laterally with the mating part 5, control the separation or connection between the blade assembly 3 and the cutting blade body 2, overcoming the risk of the blade assembly 3 falling off during the retraction process, and enabling the cutting blade body 2 to be reused. Furthermore, the blade assembly is mounted on the staple cartridge, allowing the blade assembly 3 to be replaced simultaneously when changing the staple cartridge 112, thus solving the drawback of reduced cutting performance due to blade dulling caused by repeated use of the blade assembly 3.

[0061] For example, such as Figure 4 and Figure 5 As shown, the blade assembly 3 and the pusher slider 4 can be arranged separately. When the pusher slider 4 is located at the proximal end of the staple cartridge assembly 11, the distal end of the blade assembly 3 abuts against the pusher slider 4 (for example, the blade assembly 3 and the pusher slider 4 are normally abutting, but after suturing and cutting, the pusher slider 4 will remain at the distal end in the staple cartridge 112, while the blade assembly 3 will move towards the proximal end with the cutting blade 2). Thus, in normal operation, both the blade assembly 3 and the pusher slider are located at the proximal end of the staple cartridge assembly 11. The blade assembly 3 and the pusher slider 4 of this invention can be driven by the cutting blade 2 to move along the first direction D11. When the stapler completes tissue positioning, at this time, when the cutting blade 2 moves from the proximal end to the distal end, the blade assembly 3 and the cutting blade 2 connect, further pushing the blade assembly 3 and the pusher slider 4 towards the distal end, completing the cutting and anastomosis process.

[0062] Thus, this invention ensures that when the staple cartridge assembly 11 is used for the first time, the cutting blade 2 can push the blade assembly 3 and the staple pusher slider 4 together to move distally. Furthermore, after the surgery, the staple pusher slider 4 can be disassembled along with the staple cartridge 112.

[0063] For example, such as Figure 4 and Figure 5 As shown, the blade assembly 3 also includes a blade body portion 33. For example, the free end 311B of the connecting portion 31 is further away from the distal end of the blade body portion 33 than the proximal end of the blade body portion 33 (i.e., the free end 311B of the connecting portion 31 extends beyond the proximal end of the blade body portion 33 by a distance in the axial direction D1).

[0064] For example, such as Figure 4 and Figure 5 As shown, the connecting end 311A ​​of the connecting part 31 is a pivot end, which forms a pivot connection with the blade body part 33, so that the connecting part 31 deviates outward from the center line of the stapler in the initial state (the connecting part 31 deviates outward in a straight state), and deflects inward when pressed by the mating part 5 (for example, when the connecting part 31 deflects inward, it will approach the protrusion 21, and the first opening 311C of the connecting part 31 will be mated with the protrusion 21, as described below).

[0065] For example, such as Figure 4 and Figure 5 As shown, the blade assembly 3 also includes a blade 32, and a first base 332 and a second base 333 located on both sides of the blade body 33 in a third direction D3. The blade 32 is disposed at the distal end of the blade body 33. In embodiments of this invention, the blade 32 refers to one side edge of the blade assembly 3 used for cutting tissue.

[0066] For example, such as Figure 4 As shown, the connecting part 31 corresponds to a protrusion 21. For example, the connecting part 31 is located on one side of the blade body 33 in the third direction D3. This utility model provides a protrusion feature on one side of the cutting blade body 2 to achieve lateral engagement with the connecting part 31 on the corresponding side, resulting in a reliable connection and a simple structure.

[0067] For example, such as Figure 4 and Figure 5 As shown, each of the first base 332 and the second base 333 includes a base 3301 and an inclined body 3302 extending obliquely from the base 3301 along a height direction D2 perpendicular to the axial direction D1.

[0068] In some examples, the first base 332 and the second base 333 are axially symmetrical about the blade body 33. Of course, this is merely exemplary and is not a limitation on the embodiments of this utility model.

[0069] For example, such as Figure 4 As shown, the connecting portion 31 is located between the inclined body 3302 of one of the first base portion 332 and the second base portion 333 and the blade body portion 33. For example, Figure 4 The illustration is based on the example of the connecting part 31 being located between the inclined body 3302 of the first base 332 and the blade body 33.

[0070] The embodiments of this utility model form a pivotal connection between the connecting part 31 and the blade body part 33, which not only ensures the reliability of the component connection, but also extends the service life of the parts and simplifies the structure.

[0071] It should be noted that, in this utility model, the connecting end 311A ​​of the connecting part 31 can also be fixedly connected to the blade body part 33, as long as the inward deflection and self-recovery of the connecting part 31 can be guaranteed, which will not be elaborated here.

[0072] In some examples, the stapler 1000 may also include an elastic element (not shown) located between the connecting portion 31 and the blade body portion 33, which provides elastic force to the connecting portion 31. Thus, the present invention applies elastic force to the connecting portion 31 through the elastic element, causing the connecting portion 31 to deviate outward from the centerline of the stapler 1000 in the initial state and to deflect inward when the elastic element is pressed by the mating portion 5.

[0073] For example, such as Figure 4 As shown, the connecting end 311A ​​of the connecting part 31 can be inserted into the square hole 3311 opened on the blade body part 33 to form a pivotal connection between the connecting end 311A ​​of the connecting part 31 and the blade body part 33.

[0074] For example, such as Figure 4 and Figure 5 As shown, the pusher slider 4 includes a slider body 41 and a first pusher portion 42 and a second pusher portion 43 located on both sides of the slider body 41. When the distal end of the blade body portion 33 abuts against the slider body 41, the first base portion 332 is located between the first pusher portion 42 and the slider body 41, and the second base portion 333 is located between the second pusher portion 43 and the slider body 41. The distal end of the first base portion 332 abuts against the first pusher portion 42, and the distal end of the second base portion 333 abuts against the second pusher portion 43. For example, as... Figure 4 and Figure 5 As shown, the distal end of the inclined body 3302 of the first base 332 is attached to the inner layer 421 of the first push pin part 42, and the distal end of the inclined body 3302 of the second base 333 is attached to the inner layer 431 of the second push pin part 43.

[0075] Through the ingenious design of the blade assembly and push pin slider structure, this utility model not only allows for a more compact layout of the two components, but also reduces the complexity of the connection between the parts, resulting in stronger synchronization of movement and greater stability and reliability.

[0076] For example, such as Figure 3 and Figure 4 As shown, the connecting part 31 has a first opening 311C extending through both sides of the connecting part 31. The first opening 311C is configured to engage with the protrusion 21 to achieve connection when the connecting part 31 moves along the first direction D11 and is pressed by the mating part 5. For example, when the connecting part 31 is pressed against the protrusion 21 by the mating part 5, the protrusion 21 can be inserted into the first opening 311C to achieve connection between the connecting part 31 and the cutting blade body 2.

[0077] For example, such as Figures 6-8 As shown, the mating part 5 includes a first side plate 52, wherein the first side plate 52 includes: the aforementioned mating side wall 51 and an inclined side surface 521 connected to the proximal end of the mating side wall 51 (this connection can mean that the two are an integral structure, or that they are two parts fixedly connected), wherein the inclined side surface 521 is a side surface that is inclined outward relative to the axial direction D1. In the above embodiment, the first side plate 52 is a functional side plate that mates with the connecting part 31.

[0078] For example, such as Figures 6-8 As shown, the mating part 5 may also include a second side plate 53, wherein the space between the first side plate 52 and the second side plate 53 forms the main slide of the staple cartridge assembly 11 (i.e. the aforementioned intermediate slide 113).

[0079] In some examples, the first side plate 52 and the second side plate 53 are symmetrical about the centerline of the stapler.

[0080] For example, such as Figure 7 and Figure 8 As shown, due to the inclined side surfaces of the proximal ends of the first side plate 52 and the second side plate 53, the proximal end of the intermediate slide 113 forms a funnel-shaped opening 501a. Thus, when the blade assembly 3 and the cutting blade body 2 retract together (i.e., move along the second direction D12) and the connecting part 31 moves to the funnel-shaped opening 501a, the connecting part 31 can return to its normal state. The connecting part 31 will deviate outward from the center line of the stapler. That is, after the connecting part 31 disengages from the action of the mating side wall 51, the first opening 311C and the protrusion 21 of the connecting part 31 will disengage, thereby allowing the connecting part 31 of the blade assembly 3 to return to its normal state.

[0081] This utility model controls the connection between the moving connecting part 31 and the protrusion through the slide provided on the nail cartridge and the corresponding side plate features. It has strong controllability, reliable connection, simple structure, fewer required parts, and more compact overall structure.

[0082] For example, such as Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the distal end of the connecting portion 31 includes a curled portion 301, which is configured to curl toward the center line of the anastomosis device 1000. The cutting blade body 2 has a second opening 25 that penetrates both sides of the cutting blade body 2 and allows the curled portion 301 to be inserted.

[0083] This invention allows the curled portion 301 at the end of the connecting portion 31 to be inserted through the second opening 25 of the cutting blade body 2, thereby making room for the curled portion 301 and avoiding the problem of the connecting portion 31 scratching the staple cartridge due to its movement in the main slide of the staple cartridge.

[0084] For example, such as Figure 6 As shown, the staple cartridge 112 may also include a side guide rail structure 61, which can guide the movement of the staple pusher slider 4 and the blade assembly 3.

[0085] In this embodiment of the invention, after the connecting part 31 of the blade assembly 3 is connected to the protrusion 21 of the cutting blade body 2, when the cutting blade body 2 moves from the distal end to the proximal end, it pulls the blade assembly 3 to move towards the proximal end as well, thus realizing the function of retracting the blade assembly 3 and the cutting blade body 2 together. The connecting part 31 will gradually release the pressure of the mating side wall 51 in the middle slide 113 of the staple cartridge 112, and the first opening 311C of the connecting part 31 will separate from the protrusion 21 of the cutting blade body 2, thereby separating the blade assembly 3 from the cutting blade body 2. That is, after the blade retraction is completed, the connecting part 31 on the blade assembly 3 returns to normal, and the blade assembly 3 separates from the cutting blade body 2. Therefore, this invention allows the cutting blade body 2 to be reused, and the blade assembly 3 can be replaced at the same time as the staple cartridge.

[0086] In at least one embodiment of the present invention, the handle portion of the stapler 1000 includes a power unit, wherein the power unit is configured to drive the cutting blade 2 to move axially. For example, the stapler may be an electric stapler, such as a laparoscopic stapler, but the embodiments of the present invention do not specifically limit the type of stapler.

[0087] In some embodiments of this utility model, the cutting and anastomosis process of the stapler may include at least one of the following steps:

[0088] (1) When the cutting blade 2 moves from the proximal end to the distal end of the stapler 1000 (i.e., moves along the first direction D11), the lower edge 23 of the cutting blade 2 contacts the staple cartridge seat 111, and the upper edge 24 pivots the anvil 12 along the inclined surface of the anvil 12 until it is parallel to the staple cartridge seat 111, that is, the clamp assembly 1 is closed, thereby completing the tissue positioning.

[0089] (2) When the forceps assembly 1 completes tissue positioning, the cutting blade 2 continues to move distally and comes into contact with the blade assembly 3. Since the blade assembly 3 and the pusher slider 4 abut against each other, the cutting blade 2 can drive the blade assembly 3 and the pusher slider 4 to move distally together. In this way, through the movement of the pusher slider 4, the staples in the staple cartridge assembly 11 are pushed out to suture the target tissue. At this time, the blade part 32 of the blade assembly 3 is close to the target tissue, the cutting blade 2 continues to move distally, and the blade assembly 3 begins to cut the sutured tissue. In this step, the connecting part 31 is pressed against the protrusion 21 on the same side of the cutting blade 2 by the mating side wall 51 of the staple cartridge 112 as the blade assembly 3 moves forward, thereby realizing the connection between the blade assembly 3 and the cutting blade 2.

[0090] (4) After the above-mentioned suturing and cutting, the pusher slider 4 will remain at the distal end of the staple cartridge 112 and will be disassembled together with the staple cartridge 112 after the operation. The cutting blade 2 will move towards the proximal end along the axial direction D1 (i.e., in the retraction direction, moving along the second direction D12). The cutting blade 2 and the blade assembly 3 are pulled back together. As the blade assembly 3 is pulled towards the proximal end by the cutting blade 2, the connecting part 31 gradually disengages from the pressure of the mating part 5 of the staple cartridge 112. The first opening 311C of the connecting part 31 separates from the protrusion 21 of the cutting blade 2, thereby separating the blade assembly 3 from the cutting blade 2. Thus, the cutting blade 2 can be reused and the blade assembly 3 can be replaced at the same time as the staple cartridge is replaced.

[0091] The above embodiments of this invention, by providing a connecting part 31 on the blade assembly 3 and cooperating with the slide in the staple cartridge assembly 11, control the separation or connection between the blade assembly 3 and the cutting blade body 2. This overcomes the risk of the blade assembly 3 detaching during the return process, enabling the cutting blade body 2 to be reusable and allowing the blade assembly 3 to be replaced simultaneously when changing the staple cartridge 112. This solves the problem of the blade becoming dull and reducing cutting performance due to repeated use of the blade assembly 3. Furthermore, because the blade assembly 3 can return to the proximal end of the staple cartridge assembly after firing, the safety of the patient and instrument operator is ensured despite the sharpness of the blade surface.

[0092] The following points need to be explained:

[0093] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0094] (2) Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0095] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. An anastomosis device, comprising: The stapler includes a distal end and a proximal end opposite each other along the axial direction of the stapler, the stapler comprising: handle part; A sleeve assembly is disposed at the distal end of the handle portion; A clamping body assembly that can be closed or opened is disposed at the distal end of the sleeve assembly; A cutting blade body movable along the axial direction is disposed within the sleeve assembly, wherein the cutting blade body has a protrusion that protrudes relative to the side of the cutting blade body; A blade assembly, disposed on the distal side of the cutting blade body, is configured to move along a first direction or along a second direction opposite to the first direction under the drive of the cutting blade body. The first direction is the direction of movement toward the distal end of the stapler in the axial direction. The blade assembly includes a connecting portion, which includes a connecting end located at the distal end of the connecting portion and a free end located at the proximal end of the connecting portion. The free end is adapted to the protrusion. The mating part includes a mating sidewall, which is configured to apply pressure to the connecting part when in contact with it, so that the free end of the connecting part deflects toward the protrusion. The blade assembly is configured such that, in an initial state, the connecting portion is separated from the protrusion, thereby separating the blade assembly from the cutting blade body; and, when the connecting portion moves along the first direction, it is pressed by the mating portion and connected to the protrusion, thereby detachably connecting the blade assembly to the cutting blade body.

2. The stapler as described in claim 1, characterized in that, The blade assembly also includes a blade body portion, and the connecting end of the connecting portion forms a pivot connection with the blade body portion, such that the connecting portion deviates outward from the centerline of the stapler in the initial state and deflects inward when pressure is applied by the mating portion.

3. The stapler as described in claim 2, characterized in that, The clamp assembly includes a staple cartridge assembly and a staple anvil, the staple cartridge assembly and the staple anvil being rotatable relative to each other, the staple cartridge assembly including a staple cartridge seat and a staple cartridge detachably mounted on the staple cartridge seat; The staple cartridge includes the mating portion, which is located at the proximal end of the staple cartridge.

4. The stapler as described in claim 3, characterized in that, The staple cartridge assembly also includes a staple pusher slider that is movable within the staple cartridge and configured to push the staples in the staple cartridge assembly; When the pusher slider is located at the proximal end of the staple cartridge assembly, the distal end of the blade assembly abuts against the pusher slider; The blade assembly and the pusher slider are configured to be driven by the cutting blade body to move along the first direction.

5. The stapler as described in claim 4, characterized in that, The blade assembly further includes a blade, a first base, and a second base. The blade is disposed at the distal end of the blade body portion. The first base and the second base are located on both sides of the blade body portion. Each of the first base and the second base includes a base and an inclined body extending obliquely from the base in a height direction perpendicular to the axial direction.

6. The anastomosis device as claimed in claim 5, wherein It also includes elastic components, The elastic element is located between the connecting portion and the blade body portion. The connecting portion is located between the inclined body of one of the first base portion and the second base portion and the blade body portion; The elastic element applies elastic force to the connecting portion, causing the connecting portion to deviate outward from the centerline of the stapler in the initial state and to deflect inward when the elastic element is pressed by the mating portion.

7. The stapler as described in claim 5, characterized in that, The connecting part has a first opening that extends through both sides of the connecting part. The first opening is configured to engage with the protrusion to achieve the connection when the connecting part moves along the first direction and is pressed by the mating part.

8. The stapler as described in any one of claims 5 to 7, characterized in that, The pusher slider includes a slider body and a first pusher portion and a second pusher portion located on both sides of the slider body. When the distal end of the blade body portion abuts against the slider body, the first base portion is located between the first pusher portion and the slider body, and the second base portion is located between the second pusher portion and the slider body. The distal end of the first base portion abuts against the first pusher portion, and the distal end of the second base portion abuts against the second pusher portion.

9. The stapler as described in any one of claims 5 to 7, characterized in that, The mating part includes a first side plate, the first side plate including: the mating sidewall and an inclined side surface connected to the proximal end of the mating sidewall, wherein the inclined side surface is an outwardly inclined side surface relative to the axial direction.

10. The stapler as claimed in claim 9, characterized in that, The mating part also includes a second side plate, and the space between the first side plate and the second side plate forms the main slide of the staple cartridge assembly. The first side plate and the second side plate are symmetrical about the center line of the stapler.

11. The stapler as described in claim 5, characterized in that, The distal end of the connector includes a curled portion configured to curl toward the centerline of the stapler; The cutting blade body has a second opening that extends through both sides of the cutting blade body and allows the curling part to be inserted.

12. The anastomosis device as claimed in claim 1, wherein The handle includes a power unit configured to drive the cutting blade body to move along the axial direction.

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