Staple cartridge assembly and stapler

Abstract

The present application relates to a kind of staple cartridge assembly and stapler, staple cartridge assembly includes: cutting knife and self-locking rod, both movably installed in shell;First locking piece is rotatably installed in shell, outer side wall is in the advancing direction of cutting knife in initial state and rotates away in firing state, end portion is in interference with shell in initial state and rotates to the direction of motion of self-locking rod in locking state;Second locking piece, one end portion is movably installed in shell, its side wall is in abutment with cutting knife in initial state and rotates away from the advancing direction of cutting knife in installation state, other end portion is movably connected to self-locking rod;First elastic element is arranged between shell and self-locking rod, and is configured to provide the motion tendency of self-locking rod to return to initial state;Second elastic element is arranged between shell and first locking piece, and is configured to provide the motion tendency of first locking piece from initial state to firing state, can prevent being secondly used after being fired.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a stapler assembly and a stapler. Background Technology

[0002] Minimally invasive surgery currently occupies an important position in surgical procedures. Anastomosing devices are commonly used surgical instruments in minimally invasive surgery. The working principle of an anastomosing device is to clamp the device near the lesion using a staple cartridge assembly, excise the lesion, and simultaneously suture the surrounding healthy tissue.

[0003] The stapler consists of a staple cartridge assembly, an adapter, and a handle, with the staple cartridge assembly detachably mounted on the adapter. Generally, the staple cartridge assembly is a single-use device; the titanium staples inside will suture to the tissue after firing, and the assembly is empty after use. However, the staple cartridge assembly may be reused after use due to improper handling or misplacement, leading to tissue removal without suturing, requiring manual suturing by the surgeon. This significantly increases surgical difficulty, may increase the risk of infection, and in severe cases, may endanger life. Therefore, it is necessary to confirm whether the staple cartridge assembly has been fired before use. Currently, for manual instruments, an internal locking mechanism locks the cutting blade after firing, and when attempting to fire the instrument again, significant resistance is felt, leading the user to believe the instrument may have been used and thus stopping firing. However, for electric staplers, due to their high driving force, preventing the instrument from firing again by stopping the blade movement may damage the blade, locking mechanism, or drive unit. Furthermore, discovering the misuse of the staple cartridge assembly only after installation wastes time and could even endanger life.

[0004] Therefore, how to provide a method to prevent the reuse of already fired staple cartridge components and staplers has become an urgent technical problem to be solved. Summary of the Invention

[0005] Therefore, it is necessary to provide a staple cartridge assembly and stapler that can prevent the reuse of already fired staples.

[0006] This invention provides a staple cartridge assembly for use with an adapter, having an initial state before being installed in front of the adapter, an installed state, a firing state, and a locked state after being disengaged from the adapter. It includes a housing, a cutting blade, a self-locking lever, a first locking plate, a second locking plate, a first elastic element, and a second elastic element, wherein:

[0007] Both the cutting blade and the self-locking rod are movably mounted on the housing along the axial direction of the housing;

[0008] The first locking plate is rotatably mounted on the housing with a certain radial axis. The outer side wall of the first locking plate is located in the forward direction of the cutting blade in the initial state and rotates away from the forward direction of the cutting blade in the firing state. The end of the first locking plate is interference-engaged with the housing in the initial state and rotates to the movement direction of the self-locking rod in the locking state.

[0009] One end of the second locking piece is movably mounted on the housing, and in the initial state, its sidewall abuts against the cutting blade and in the mounted state, it rotates away from the forward direction of the cutting blade; the other end of the second locking piece is movably engaged with the self-locking rod.

[0010] The first elastic element is disposed between the housing and the self-locking rod, and is configured to provide a tendency for the self-locking rod to return to the initial state;

[0011] The second elastic element is disposed between the housing and the first locking piece, and is configured to provide the first locking piece with a tendency to move from the initial state to the firing state.

[0012] In the aforementioned staple cartridge assembly, in the initial state (not fired and not installed on the adapter), the outer wall of the first locking plate is located in the forward direction of the cutting blade, and its end is press-fitted with the housing. The second locking plate abuts against the cutting blade. In the installed state, it is located on the adapter. Under external force, the self-locking lever moves towards the first locking plate, causing the second locking plate to move along with it on the housing. The end of the second locking plate rotates away from the forward direction of the cutting blade, and the first elastic element is compressed, allowing the cutting blade to move. Then, under external force, the cutting blade actuates, the jaws of the staple cartridge assembly clamp the tissue, and the firing operation begins. After the cutting blade moves a certain distance, it pushes the first locking plate to rotate. The first locking plate overcomes the press-fitting force with the housing, causing the first locking plate to disengage from the housing, and then rotates under the push of the second elastic element. When the first locking plate is in the firing state, it rotates away from the forward direction of the cutting blade. After firing, the staple cartridge assembly is detached from the adapter, and the self-locking lever is reset under the action of the first elastic element. At this time, the first locking plate switches to the locked state and is located in the direction of movement of the self-locking lever. When attempting to reinstall this used staple cartridge assembly, the self-locking lever can only move forward slightly towards the first locking plate before being blocked by the first locking plate, thus preventing the staple cartridge assembly from being reused. At this time, the first locking plate supports the self-locking lever in the direction of movement of the self-locking lever, so that the first locking plate can be subjected to a large blocking force, which can prevent the staple cartridge assembly from being fired a second time. It can also determine whether the staple cartridge assembly has been used without installing it on the stapler, thus preventing the reuse of the fired staple cartridge assembly.

[0013] In one embodiment, the housing includes:

[0014] The inner housing has a first slot for accommodating the cutting blade, a first through slot for accommodating the second elastic member and the first locking piece, a first groove for accommodating part of the self-locking rod, a second groove for accommodating part of the second locking piece, and a third groove for accommodating the first elastic member and part of the self-locking rod. The first groove is connected to the first through slot, the second groove and the third groove respectively.

[0015] The outer shell is fitted onto the inner shell.

[0016] In one embodiment, the first through groove has a first groove wall and a second groove wall connected to each other, and a first protrusion protrudes from the first groove wall.

[0017] One end of the first locking piece is mounted on the opposite side of the first groove wall via a first rotating shaft extending radially along the inner housing, and the other end has an opening on its end face that matches the first protrusion;

[0018] One end of the second elastic element is fixed to the second groove wall, and the other end is fixed to the side wall of the first locking piece in a region away from the first groove wall.

[0019] In one embodiment, the first through groove further has a third groove wall connected to the second groove wall. The surface of the third groove wall includes a connected arc surface and a first plane. The end of the first locking piece is a cylindrical portion that matches the arc surface. A first boss protrudes from the side wall of the first locking piece away from the second groove wall. The surface of the first boss away from the first protrusion matches the first plane and abuts against the first plane in the locked state.

[0020] In one embodiment, the first locking plate has a second protrusion protruding from the sidewall exposed towards the cutting blade. The sidewall of the second protrusion has a slope that matches the cutting blade. In the initial state, the side of the slope away from the first sidewall is closer to the forward direction of the cutting blade than the side closer to the first sidewall, and is located in the forward direction of the cutting blade.

[0021] In one embodiment, the self-locking rod has a first body and a second body, the first body being slidably disposed in the first groove, the second body protruding from the middle region of the side wall of the first body and having its end inserted into the third groove, and the two ends of the first elastic member respectively abutting against the opposite side walls of the third groove and the second body.

[0022] In one embodiment, the self-locking rod further includes a third body that protrudes from the sidewall of the second body and is located within the third groove, and the first elastic element is a spring that is sleeved on the third body.

[0023] In one embodiment, the self-locking rod has a second through slot, and the second locking piece includes a first piece and a third boss, wherein:

[0024] One end of the first piece is slidably disposed in the second groove, and the end sidewall abuts against the cutting blade in the initial state; the other end of the first piece is disposed above the second through groove.

[0025] The third protrusion protrudes from the side of the first piece and is movably disposed in the second through groove.

[0026] In one embodiment, the second groove extends circumferentially along the inner housing, and the second through groove includes a first groove, a second groove, and a third groove. The extension directions of the first groove and the second groove are parallel to the axial direction of the inner housing, and they are offset in the circumferential and axial directions of the inner housing. The first groove is close to the first through groove, and the third groove connects the first groove and the second groove. In the initial state, the third protrusion is located in the first groove.

[0027] In addition, the present invention also provides an anastomosis device, including the staple cartridge assembly as described in any of the above technical solutions.

[0028] In the aforementioned stapler, since the staple cartridge assembly is initially not fired and not installed on the adapter, the outer wall of the first locking plate is located in the forward direction of the cutting blade, and its end is press-fitted with the housing, while the second locking plate abuts against the cutting blade. In the installed state, it is located on the adapter. Under external force, the self-locking lever moves towards the first locking plate, causing the second locking plate to move along with it on the housing. The end of the second locking plate rotates away from the forward direction of the cutting blade, compressing the first elastic element, allowing the cutting blade to move. Then, under external force, the cutting blade actuates, the jaws of the staple cartridge assembly clamp the tissue, and the firing operation begins. After moving a certain distance, the cutting blade pushes the first locking plate to rotate. The first locking plate overcomes the press-fitting force with the housing, causing it to disengage from the housing, and under the push of the second elastic element... Rotating, the first locking plate rotates away from the forward direction of the cutting blade when in the firing state; after firing, the staple cartridge assembly is detached from the adapter, and the self-locking lever returns to its original position under the action of the first elastic element. At this time, the first locking plate switches to the locked state, and the first locking plate is located in the direction of movement of the self-locking lever; when attempting to reinstall this used staple cartridge assembly, the self-locking lever can only move forward slightly towards the first locking plate before being blocked by the first locking plate, thus preventing the staple cartridge assembly from being reused. Furthermore, at this time, the first locking plate supports the self-locking lever in the direction of movement of the self-locking lever, so that the first locking plate is subjected to a greater blocking force, preventing the staple cartridge assembly from being fired a second time. It also allows for the determination of whether the staple cartridge assembly has been used without needing to install it on the stapler, thus preventing the reuse of a fired staple cartridge assembly. Therefore, the stapler with this staple cartridge assembly can effectively prevent the reuse of a fired staple cartridge assembly, avoid frequent disassembly and assembly of the stapler, improve the reliability of the stapler, and is suitable for both manual and electric staplers, making it widely applicable. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a staple cartridge assembly provided in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the module formed by removing the outer shell of the nail chamber component;

[0031] Figure 3 for Figure 1 A schematic diagram of the module formed by removing the outer shell of the nail chamber component in its initial state;

[0032] Figure 4 for Figure 1 A schematic diagram of the module assembly after removing the outer shell of the nail chamber component;

[0033] Figure 5 for Figure 1 A schematic diagram of the firing state of the module formed by removing the outer shell of the middle nail magazine assembly;

[0034] Figure 6 for Figure 1 A schematic diagram of the module formed by removing the outer shell of the nail chamber component after detaching from the adapter;

[0035] Figure 7 for Figure 1 A schematic diagram of the module formed by removing the outer shell of the nail chamber assembly in the locked state;

[0036] Figure 8 for Figure 1 A schematic diagram of the module formed by removing the outer shell and part of the inner shell of the nail chamber assembly in its initial state;

[0037] Figure 9 for Figure 1 A schematic diagram of the module formed by removing the outer shell and part of the inner shell of the nail chamber assembly in the installed state;

[0038] Figure 10 for Figure 1 A schematic diagram of the module consisting of the cutting blade and the first locking plate inside the nail magazine in its initial state;

[0039] Figure 11 for Figure 1 A schematic diagram of the module consisting of the cutting blade and the first locking plate inside the middle nail magazine when firing begins;

[0040] Figure 12 for Figure 1 A schematic diagram of the module consisting of the cutting blade and the first locking plate inside the nail magazine in the firing state;

[0041] Figure 13 for Figure 1 A schematic diagram of the module consisting of the cutting blade and the first locking plate inside the middle nail magazine in the firing state from another angle;

[0042] Figure 14 for Figure 13 A schematic diagram of the module consisting of the cutting blade and the first locking plate inside the nail magazine assembly in the firing state from another angle.

[0043] Figure label:

[0044] 10. Staple tray component;

[0045] 100. Shell; 110. Inner shell; 111. First through groove; 1111. First groove wall; 1112. Second groove wall; 1113. First protrusion; 1114. Third groove wall; 1115. Arc surface; 1116. First plane; 112. First groove; 113. Second groove; 114. Third groove; 120. Outer shell;

[0046] 200. Cutting knife;

[0047] 300. Self-locking rod; 310. First body; 320. Second body; 330. Third body; 340. Second through slot; 341. First slot; 342. Second slot; 343. Third slot;

[0048] 400, First locking plate; 410, First recess; 420, Cylindrical part; 430, First boss; 440, Second boss; 441, Inclined surface;

[0049] 500, Second locking plate; 510, First plate; 520, Third boss;

[0050] 600. First elastic element;

[0051] 700. Second elastic element;

[0052] 800, First pivot. Detailed Implementation

[0053] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0059] The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0060] like Figure 1 As shown, the present invention provides a staple cartridge assembly 10, which is installed on and used in conjunction with an adapter to suture internal titanium staples to the tissue after firing. The staple cartridge assembly 10 has an initial state, an installed state, a fired state, and a locked state. The initial state is the state of the components of the staple cartridge assembly 10 before it is installed on the adapter and has not been fired. The installed state is the state of the components of the staple cartridge assembly 10 when it is not installed on the adapter. The fired state is the state of the components of the staple cartridge assembly 10 after firing. The locked state is the state of the components of the staple cartridge assembly 10 after it has been disengaged from the adapter after firing. (See also...) Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 as well as Figure 9 The staple cartridge assembly 10 includes a housing 100, a cutting blade 200, a self-locking rod 300, a first locking plate 400, a second locking plate 500, a first elastic element 600, and a second elastic element 700, wherein:

[0061] The cutting blade 200 is mounted on the housing 100 and is movable relative to the housing 100 along the axial direction of the housing 100. The self-locking rod 300 is mounted on the housing 100 and is movable relative to the housing 100 along the axial direction of the housing 100.

[0062] The first locking plate 400 is mounted on the housing 100, and the first locking plate 400 can rotate relative to the housing 100 about a certain radial axis of the housing 100; in the initial state, the outer wall of the first locking plate 400 is located in the forward direction of the cutting blade 200, and in the firing state, the outer wall of the first locking plate 400 rotates away from the forward direction of the cutting blade 200; in the initial state, the end of the first locking plate 400 is interference-fitted with the housing 100, and in the locked state, the end of the first locking plate 400 rotates to the movement direction of the self-locking rod 300.

[0063] One end of the second locking plate 500 is mounted on the housing 100, and this end of the second locking plate 500 is movable relative to the housing 100. The sidewall of this end of the first locking plate 500 abuts against the cutting blade 200 in the initial state, and this end of the first locking plate 500 rotates away from the forward direction of the cutting blade 200 in the installed state. The other end of the second locking plate 500 is engaged with the self-locking rod 300, and this end of the second locking plate 500 is movable relative to the self-locking rod 300. In a specific configuration, the second locking plate 500 has a C-shaped structure. One end of the C-shaped structure is located near the cutting blade 200, and in the initial state, it is located in the forward direction of the cutting blade 200 and abuts against the opposite side of the cutting blade 200. The other end of the C-shaped structure is located near the self-locking rod 300 and is engaged with the self-locking rod 200.

[0064] The first elastic element 600 is disposed between the housing 100 and the self-locking rod 300, and the first elastic element 600 is configured to provide a tendency for the self-locking rod 300 to return to its initial state; in specific configuration, the first elastic element 600 can be a spring, an elastic sheet, or other structural forms that can meet the requirements.

[0065] The second elastic element 700 is disposed between the housing 100 and the first locking plate 400, and the second elastic element 700 is configured to provide the first locking plate 400 with a movement tendency from the initial state to the firing state; in specific configuration, the second elastic element 700 can be a spring, an elastic plate, or other structural forms that can meet the requirements.

[0066] In the initial state, when the staple cartridge assembly 10 is not fired and is not installed on the adapter, the outer wall of the first locking plate 400 is located in the forward direction of the cutting blade 200, and at this time, the outer wall of the first locking plate 400 is at a certain distance from the cutting blade 200 in the forward direction of the cutting blade 200. The jaws of the staple cartridge assembly 10 are open, the end of the first locking plate 400 is press-fitted with the housing 100, and the second locking plate 500 abuts against the cutting blade 200. In the installed state, it is located on the adapter, and the self-locking lever 300 is subjected to external force. The first locking plate 400 moves downwards, and the locking lever 300 drives the second locking plate 500 to move on the housing 100. The end of the second locking plate 500 rotates away from the forward direction of the cutting blade 200, and the first elastic element 600 is compressed. At this time, the cutting blade 200 can move. Then, the cutting blade 200 moves under the action of external force. After the jaws of the staple cartridge assembly 10 clamp the tissue, the firing operation begins. After the cutting blade 200 moves a certain distance (about 4mm), it pushes the first locking plate 400 to rotate. The first locking plate 400 overcomes the interference fit with the housing 100. The locking force disengages the first locking plate 400 from the housing 100 and rotates under the push of the second elastic element 700. In the firing state, the first locking plate 400 rotates away from the forward direction of the cutting blade 200. After firing, the staple cartridge assembly 10 is detached from the adapter, and the self-locking lever 300 resets under the action of the first elastic element 600. At this time, the first locking plate 400 switches to the locked state, positioned in the direction of movement of the self-locking lever 300. When attempting to reinstall the used staple cartridge assembly 10, the self-locking mechanism... The lever 300 can only move forward slightly towards the first locking plate 400 before being stopped by the first locking plate 400, thus preventing the staple cartridge assembly 10 from being reused. At this time, the first locking plate 400 supports the self-locking lever 300 in the direction of movement of the self-locking lever 300, so that the first locking plate 400 can be subjected to a large blocking force, which can prevent the staple cartridge assembly 10 from being fired a second time. Furthermore, it can be determined whether the staple cartridge assembly 10 has been used without being installed on the stapler, so as to prevent the reuse of the fired staple cartridge assembly 10.

[0067] The housing 100 has various structural forms, one preferred embodiment is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the housing 100 includes two parts: an inner housing 110 and an outer housing 120, wherein:

[0068] The inner housing 110 has a first slot, a first through slot 111, a first recess 112, a second recess 113, and a third recess 114. The first slot is used to accommodate the cutting blade 200. The first through slot 111 is used to accommodate the second elastic member 700 and the first locking piece 400. The first recess 112 is used to accommodate part of the self-locking rod 300 and is connected to the first through slot 111. The second recess 113 is used to accommodate part of the second locking piece 500 and is connected to the first recess 112. The third recess 114 is used to accommodate the first elastic member 600 and part of the self-locking rod 300 and is connected to the first recess 112.

[0069] The outer shell 120 is fitted onto the outside of the inner shell 110.

[0070] In the aforementioned staple cartridge assembly 10, the inner housing 110 is provided with a first slot, a first through slot 111, a first groove 112, a second groove 113, and a third groove 114 to facilitate the arrangement of the cutting blade 200, the self-locking rod 300, the first locking plate 400, the second locking plate 500, the first elastic element 600, and the second elastic element 700. This also allows for a smaller structural size of the housing 100, reducing the impact on the patient's normal tissues. Furthermore, the outer shell 120 on the inner housing 110 makes the outer side of the overall structure smoother, preventing entanglement with the patient's tissues. Of course, the structural form of the housing 100 is not limited to the above structure and can be other forms that meet the requirements.

[0071] The first locking piece 400 and the second elastic member 700 can be arranged in various ways within the first through groove 111. One preferred embodiment is as follows: Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the first through groove 111 has a first groove wall 1111 and a second groove wall 1112, which are connected. A first protrusion 1113 protrudes from the first groove wall 1111. In a specific configuration, the first protrusion 1113 is located on the side of the first groove wall 1111 closer to the second groove wall 1112. The protrusion height of the first protrusion 1113 is relatively small. The first protrusion 1113 can be an ellipsoidal protrusion, a hemispherical protrusion, or other structural forms that meet the requirements.

[0072] One end of the first locking plate 400 is mounted on the opposite side of the first groove wall 1111 via the first rotating shaft 800, and the first rotating shaft 800 extends radially along the inner housing 110; the other end of the first locking plate 400 has an opening on the end face of the first recess 410, the first recess 410 extends a certain distance into the first locking plate 400, the shape of the first recess 410 matches the first protrusion 1113, and the first recess 410 and the first protrusion 1113 cooperate with each other. In the initial state, the first recess 410 and the first protrusion 1113 are in interference fit, and in the firing state, the first recess 410 and the first protrusion 1113 are disengaged.

[0073] One end of the second elastic element 700 is fixed to the second groove wall 1112 by means of snap-fit, convex-concave fit, threaded connection, etc., and the other end of the second elastic element 700 is fixed to the side wall of the first locking piece 400 in the area away from the first groove wall 1111 by means of snap-fit, convex-concave fit, threaded connection, etc. Of course, the fixed connection method between the second elastic element 700 and the second groove wall 1112 and the side wall of the first locking piece 400 is not limited to this, and can also be other methods that can meet the requirements.

[0074] In the aforementioned staple cartridge assembly 10, by providing a first protrusion 1113 and a first recess 410, the first recess 410 and the first protrusion 1113 cooperate to facilitate the interference fit between the first locking plate 400 and the housing 100 in the initial state, and the first recess 410 and the first protrusion 1113 can be disengaged under a small force, so that the first locking plate 400 can rotate from the initial state to the firing state. Moreover, the position of the second elastic member 700 also determines that it can push the first locking plate 400 from the initial state to the firing state. Of course, the arrangement of the first locking plate 400 and the second elastic member 700 in the first through groove 111 is not limited to this, and can also be other methods that meet the requirements.

[0075] In order to increase the ability of the first locking plate 400 to withstand the thrust of the self-locking rod 300 in the direction of movement of the self-locking rod 300, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7As shown, specifically, the first through groove 111 also has a third groove wall 1114, which is connected to the second groove wall 1112; the surface of the third groove wall 1114 includes an arc surface 1115 and a first plane 1116, which are connected; the end of the first locking piece 400 is a cylindrical portion 420, which matches the arc surface 1115 so that the first locking piece 400 can rotate smoothly within the housing 100; a first boss 430 protrudes from the side wall of the first locking piece 400 away from the second groove wall 1112, and the surface of the first boss 430 away from the first protrusion 1113 matches the first plane 1116. Furthermore, the surface of the first boss 430 away from the first protrusion 1113 abuts against the first plane 1116 in the locked state, so that the first locking plate 400 supports the self-locking rod 300 in the direction of movement of the self-locking rod 300. The surface of the first boss 430 away from the first protrusion 1113 abuts against the first plane 1116, resulting in a large force-bearing area. In addition, the first locking plate 400 has a supporting portion in the direction of movement of the self-locking rod 300, thereby enabling the first locking plate 400 to withstand a large thrust of the self-locking rod 300 in the direction of movement of the self-locking rod 300, which can effectively prevent the staple cartridge assembly 10 from being fired a second time. The above-mentioned staple cartridge assembly 10 has good structural stability.

[0076] To facilitate the rotation of the first locking plate 400, specifically, as follows: Figure 6 , Figure 10 , Figure 11 , Figure 12 , Figure 13 as well as Figure 14 As shown, a second boss 440 protrudes from the side wall of the first locking plate 400 facing the cutting blade 200. The side wall of the second boss 440 has an inclined surface 441, which matches the cutting blade 200. In the initial state, the side of the inclined surface 441 away from the first side wall is closer to the forward direction of the cutting blade 200 than the side closer to the first side. The side of the inclined surface 441 away from the first side wall is located in the forward direction of the cutting blade 200, which makes it easy for the cutting blade 200 to push the first locking plate 400 to rotate. Of course, the side wall of the second boss 440 is not limited to having an inclined surface 441, and can also be other structural forms that meet the requirements.

[0077] The self-locking lever 300 has various structural forms, one preferred embodiment is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7As shown, the self-locking rod 300 has a first body 310 and a second body 320. The first body 310 and the second body 320 can be an integral structure or separate structures that are later fixed together by welding, threaded connection, or other methods. The first body 310 is disposed in the first groove 112 and can slide relative to the first groove 112. In a specific configuration, the first body 310 and the first groove 112 are engaged together to improve the structural stability of the self-locking rod 300 within the first groove 112. The second body 320... The first elastic member 600 can protrude from the middle area of ​​the side wall of the first body 310, and the end of the second body 320 is inserted into the third groove 114. One end of the first elastic member 600 abuts against the side wall of the third groove 114 relative to the second body 320, and the other end of the first elastic member 600 abuts against the side wall of the second body 320 relative to the third groove 114. Of course, in order to ensure the connection strength, the first elastic member 600 and the third groove 114, and the first elastic member 600 and the second body 320 can be fixed together by snap-fit, threaded connection or other means.

[0078] In the aforementioned staple cartridge assembly 10, by defining the first body 310 and the first groove 112, the second body 320 and the third groove 114, and with the first groove 112 and the third groove 114 connected, the sliding of the self-locking lever 300 within the housing 100 can be facilitated. Furthermore, by defining the positions of the second body 320 and the first elastic member 600, the movement trend of the first locking piece 400, configured by the second elastic member 700, from its initial state to its firing state can be facilitated. Specifically, the first groove 112 and the third groove 114 can be offset circumferentially within the inner housing 110, and the extending directions of the first groove 112 and the third groove 114 are parallel to the axial direction of the inner housing 110.

[0079] To ensure the structural stability of the first elastic element 600, specifically, as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the self-locking rod 300 also includes a third body 330, which protrudes from the side wall of the second body 320 and is located in the third groove 114. The first elastic element 600 is a spring, which is sleeved on the third body 330. The third body 330 acts as a limiting element for the first elastic element 600, preventing the first elastic element 600 from popping out of the third groove 114 during compression, thereby ensuring the structural stability of the first elastic element 600. Of course, the structure that can ensure the stability of the first elastic element 600 is not limited to this, and can also be other forms that meet the requirements.

[0080] To facilitate the movable engagement of the self-locking rod 300 and the second locking plate 500 into one unit, a preferred embodiment is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, a second through groove 340 is provided on the self-locking rod 300. The second locking piece 500 includes a first piece 510 and a third boss 520. The first piece 510 and the third boss 520 can be an integral structure or a separate structure that is later fixed together by welding, threaded connection, or other methods.

[0081] One end of the first piece 510 is disposed in the second groove 113, and this end of the first piece 510 can slide relative to the second groove 113. The end sidewall of the first piece 510 abuts against the cutting blade 200 in the initial state, and the other end of the first piece 510 is disposed above the second through groove 340. In a specific configuration, the first piece 510 and the second groove 113 are engaged together to improve the structural stability of the second locking piece 500 in the second groove 113.

[0082] The third boss 520 protrudes from the side of the first piece 510 and is disposed in the second through groove 340. The third boss 520 is movable relative to the second through groove 340.

[0083] In the aforementioned staple cartridge assembly 10, by defining the second through groove 340 and the third boss 520, the third boss 520 can move within the second through groove 340, so that the self-locking rod 300 and the second locking piece 500 can be movably engaged; and by defining the second locking piece 500 as including the first piece 510 and the third boss 520, the first piece 510 can slide smoothly and steadily within the second groove 113.

[0084] To facilitate the movement of the second locking plate 500 relative to the self-locking lever 300, specifically, as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7As shown, the second groove 113 extends circumferentially along the inner shell 110, and the second through groove 340 includes three parts: a first groove 341, a second groove 342, and a third groove 343. The extending direction of the first groove 341 is parallel to the axial direction of the inner shell 110, and the extending direction of the second groove 342 is parallel to the axial direction of the inner shell 110. The first groove 341 and the second groove 342 are offset in both the circumferential and axial directions of the inner shell 110, with the first groove 341 close to the first through groove 111; the third groove... Body 343 connects the first groove 341 and the second groove 342. In the initial state, the third boss 520 is located in the first groove 341. By sliding the third boss 520 in the first groove 341, the second groove 342 and the third groove 343, the self-locking rod 300 can be moved axially in the housing 100. By sliding the third boss 520 in the third groove 343, the second locking piece 500 can be moved circumferentially in the housing 100.

[0085] In addition, the present invention also provides a stapler, including the staple cartridge assembly 10 of any of the above technical solutions. The stapler also includes an adapter and a handle. The staple cartridge assembly 10 is mounted on the adapter, and the handle is connected to the adapter for driving the staple cartridge assembly 10 to move.

[0086] In the aforementioned stapler, since the staple cartridge assembly 10 is not fired and not installed on the adapter in the initial state, the outer wall of the first locking plate 400 is located in the forward direction of the cutting blade 200, and at this time, the outer wall of the first locking plate 400 is at a certain distance from the cutting blade 200 in the forward direction of the cutting blade 200. The jaws of the staple cartridge assembly 10 are open, the end of the first locking plate 400 is press-fitted with the housing 100, and the second locking plate 500 abuts against the cutting blade 200; in the installed state, it is located on the adapter, and the self-locking lever 300... Under the action of external force, the first locking plate 400 moves, and the locking rod 300 drives the second locking plate 500 to move on the housing 100. The end of the second locking plate 500 rotates away from the forward direction of the cutting blade 200, and the first elastic element 600 is compressed. At this time, the cutting blade 200 can move. Then, the cutting blade 200 moves under the action of external force, and the jaws of the staple cartridge assembly 10 clamp the tissue and begin the firing operation. After the cutting blade 200 moves a certain distance (about 4mm), it pushes the first locking plate 400 to rotate. The first locking plate 400 overcomes the resistance with the housing 100. The interference fit forces the first locking plate 400 to disengage from the housing 100 and rotates under the push of the second elastic element 700. In the firing state, the first locking plate 400 rotates away from the forward direction of the cutting blade 200. After firing, the staple cartridge assembly 10 is detached from the adapter, and the self-locking lever 300 resets under the action of the first elastic element 600. At this time, the first locking plate 400 switches to the locked state, and the first locking plate 400 is located in the direction of movement of the self-locking lever 300. When attempting to reinstall this used staple cartridge assembly 10... The self-locking lever 300 can only move forward a tiny distance towards the first locking plate 400 before being stopped by it. This prevents the staple cartridge assembly 10 from being reused. At this time, the first locking plate 400 supports the self-locking lever 300 in its direction of movement, providing significant resistance and preventing the staple cartridge assembly 10 from being fired again. Furthermore, it allows for the determination of whether the staple cartridge assembly 10 has been used without needing to be installed on the stapler, thus preventing the reuse of a fired staple cartridge assembly 10. Therefore, a stapler with this staple cartridge assembly 10 can effectively prevent the reuse of a fired staple cartridge assembly 10 and avoid frequent disassembly and assembly, improving the reliability of the stapler. Moreover, the aforementioned staple cartridge assembly 10 is applicable to both manual and electric staplers and has a wide range of applications.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A staple cartridge assembly, used in conjunction with an adapter, having an initial state before being installed in front of the adapter, an installed state, a firing state, and a locked state after being disengaged from the adapter, characterized in that, It includes a housing, a cutting blade, a self-locking rod, a first locking plate, a second locking plate, a first elastic element, and a second elastic element, wherein: Both the cutting blade and the self-locking rod are movably mounted on the housing along the axial direction of the housing; The first locking plate is rotatably mounted on the housing with a certain radial axis. The outer side wall of the first locking plate is located in the forward direction of the cutting blade in the initial state and rotates away from the forward direction of the cutting blade in the firing state. The end of the first locking plate is interference-engaged with the housing in the initial state and rotates to the movement direction of the self-locking rod in the locking state. One end of the second locking piece is movably mounted on the housing, and in the initial state, its sidewall abuts against the cutting blade and in the mounted state, it rotates away from the forward direction of the cutting blade; the other end of the second locking piece is movably engaged with the self-locking rod. The first elastic element is disposed between the housing and the self-locking rod, and is configured to provide a tendency for the self-locking rod to return to the initial state; The second elastic element is disposed between the housing and the first locking piece, and is configured to provide the first locking piece with a tendency to move from the initial state to the firing state.

2. The staple cartridge assembly according to claim 1, characterized in that, The housing includes: The inner housing has a first slot for accommodating the cutting blade, a first through slot for accommodating the second elastic member and the first locking piece, a first groove for accommodating part of the self-locking rod, a second groove for accommodating part of the second locking piece, and a third groove for accommodating the first elastic member and part of the self-locking rod. The first groove is connected to the first through slot, the second groove and the third groove respectively. The outer shell is fitted onto the inner shell.

3. The staple cartridge assembly according to claim 2, characterized in that, The first through groove has a first groove wall and a second groove wall connected to each other, and a first protrusion protrudes from the first groove wall; One end of the first locking piece is mounted on the opposite side of the first groove wall via a first rotating shaft extending radially along the inner housing, and the other end has an opening on its end face that matches the first protrusion; One end of the second elastic element is fixed to the second groove wall, and the other end is fixed to the side wall of the first locking piece in a region away from the first groove wall.

4. The staple cartridge assembly according to claim 3, characterized in that, The first through groove also has a third groove wall connected to the second groove wall. The surface of the third groove wall includes a connected arc surface and a first plane. The end of the first locking piece is a cylindrical part that matches the arc surface. A first boss protrudes from the side wall of the first locking piece away from the second groove wall. The surface of the first boss away from the first protrusion matches the first plane and abuts against the first plane when the locking state is reached.

5. The staple cartridge assembly according to claim 3, characterized in that, The first locking plate has a second protrusion on the side wall exposed towards the cutting blade. The side wall of the second protrusion has an inclined surface that matches the cutting blade. In the initial state, the side of the inclined surface away from the first groove wall is closer to the forward direction of the cutting blade than the side closer to the first groove wall, and is located in the forward direction of the cutting blade.

6. The staple cartridge assembly according to claim 2, characterized in that, The self-locking rod has a first body and a second body. The first body is slidably disposed in the first groove. The second body protrudes from the middle area of ​​the side wall of the first body and its end is inserted into the third groove. The two ends of the first elastic member abut against the opposite side walls of the third groove and the second body, respectively.

7. The staple cartridge assembly according to claim 6, characterized in that, The self-locking rod also includes a third body, which protrudes from the side wall of the second body and is located in the third groove. The first elastic element is a spring, which is sleeved on the third body.

8. The staple cartridge assembly according to claim 2, characterized in that, The self-locking rod has a second through slot, and the second locking piece includes a first piece and a third boss, wherein: One end of the first piece is slidably disposed in the second groove, and the end sidewall abuts against the cutting blade in the initial state; the other end of the first piece is disposed above the second through groove. The third protrusion protrudes from the side of the first piece and is movably disposed in the second through groove.

9. The staple cartridge assembly according to claim 8, characterized in that, The second groove extends circumferentially along the inner shell. The second through groove includes a first groove, a second groove, and a third groove. The extension directions of the first groove and the second groove are parallel to the axial direction of the inner shell and are offset in the circumferential and axial directions of the inner shell. The first groove is close to the first through groove. The third groove connects the first groove and the second groove. In the initial state, the third protrusion is located in the first groove.

10. A stapler, characterized in that, Includes the staple cartridge assembly as described in any one of claims 1 to 9.

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