Laparoscopic cutting stapler assembly

Abstract

The present invention provides a laparoscopic cutting stapler assembly, which relates to the field of medical device technology and aims to solve the problem in the prior art that the cutting blade and safety mechanism cannot be replaced together with the stapler, resulting in poor cutting effect and increased surgical risk. The stapler assembly includes a stapler body, a stapler assembly, and a safety mechanism. The safety mechanism is arranged in the stapler assembly. The stapler assembly includes a stapler and a slider cutting assembly. The slider cutting assembly is slidably installed in the stapler, and a knife groove is provided in the stapler. An accommodating portion for installing the safety mechanism is formed at the end of the stapler near the push blade plate assembly. The safety mechanism has a storage state and a blocking state. In the storage state, the safety mechanism allows the push blade plate assembly to push the slider cutting assembly to move in the knife groove away from the sleeve assembly. When the push blade plate assembly is reset, it can disengage from the sliding cutting assembly and put the safety mechanism into the blocking state. In the blocking state, the safety mechanism can close the knife groove to limit the distance the push blade plate assembly can move.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a laparoscope cutting stapler assembly. Background Art

[0002] In current clinical surgery, laparoscopic staplers play an increasingly important role as cutting and suturing devices. Laparoscopic staplers offer advantages such as minimal incision and rapid postoperative recovery, leading to their widespread use in recent years.

[0003] The Covidien laparoscopic stapler consists of two parts: the instrument body and the components. Typically, one instrument is used with multiple components during a single surgery. The cost of each component is relatively high, placing a heavy medical burden on patients.

[0004] The component structure of the laparoscopic stapler is complex and consists of many parts. If most of the parts of the component are used multiple times in one operation, it will greatly reduce the patient's medical costs.

[0005] The components include the stapler body, the staple cartridge assembly, and the cutting blade mechanism. The sharpness of the cutting blade is a key parameter for achieving effective cutting and suturing. In existing laparoscopic staplers, the staple cartridge assembly is a single-use product, but the cutting blade is attached to the stapler body and is intended for repeated use. The cutting edge of the cutting blade mechanism becomes increasingly blunt with increasing number of cuts. Repeated use of the cutting blade can severely affect the sharpness of the cutting blade and render the safety mechanism on the stapler body ineffective, thereby reducing surgical quality and increasing certain medical risks. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a laparoscopic cutting stapler assembly to solve the technical problem in the prior art that the cutting knife and the safety mechanism cannot be replaced together with the staple magazine, that is, the cutting knife needs to be used multiple times in one operation, resulting in poor cutting effect and bringing great risks to the operation.

[0007] In order to achieve the above-mentioned object, the present invention provides a laparoscopic cutting stapler assembly, comprising a staple cartridge body, a staple cartridge assembly, and a safety mechanism, wherein the safety mechanism is disposed in the staple cartridge assembly, wherein:

[0008] The nail magazine assembly includes a nail magazine and a slider cutting assembly. The slider cutting assembly is slidably installed in the nail magazine. The nail magazine is provided with a knife groove along its length. The end of the nail magazine near the push plate assembly in the nail magazine body is formed with a receiving portion for installing the safety mechanism.

[0009] The safety mechanism has a storage state and a blocking state. The safety mechanism in the storage state can allow the push blade plate assembly to push the sliding block cutting assembly to move in the direction of the sleeve assembly away from the nail magazine body within the knife groove; when the push blade plate assembly is reset, it can disengage from the sliding cutting assembly and can put the safety mechanism in the blocking state. The safety mechanism in the blocking state can close the knife groove to limit the distance that the push blade plate assembly moves away from the sleeve assembly.

[0010] As a further improvement of the present invention, the slider cutting assembly includes a slider portion and a cutting portion, the slider portion is slidably installed in the knife groove, one end of the cutting portion is rotatably connected with the slider portion, the cutting edge of the cutting portion can be accommodated in the knife groove, and the push blade plate assembly can cooperate with the cutting portion so that the cutting portion can rotate relative to the slider portion to a position where the knife groove is exposed under the thrust of the push blade plate assembly.

[0011] As a further improvement of the present invention, mating parts that can cooperate with the safety mechanism are respectively provided on both sides of the end portion of the slider portion connected to the cutting portion, and the safety mechanisms are respectively provided on both sides of the slider cutting assembly. The safety mechanisms in the retracted state can cooperate with the corresponding mating parts to expose the knife groove, and the safety mechanism can disengage from the mating parts and abut against the push plate assembly when the push plate assembly pushes the slider cutting assembly away from the sleeve assembly.

[0012] As a further improvement of the present invention, the safety mechanism includes a safety torsion spring and a torsion spring shaft, the safety torsion spring is sleeved on the torsion spring shaft, a mounting hole for installing the torsion spring shaft is provided in the accommodating portion, the safety torsion spring is installed in the accommodating portion through the torsion spring shaft, and the mating portion of the slider portion can cooperate with the safety torsion spring to prevent the safety torsion spring from closing the knife groove.

[0013] As a further improvement of the present invention, the nail magazine body includes a nail magazine bracket, a nail anvil assembly, a push knife plate assembly, a sleeve assembly and a nail magazine bracket spring piece. The nail magazine bracket is hinged on the sleeve assembly and forms a detachable connection with the nail magazine. The nail anvil assembly is fixed to the sleeve assembly. One end of the nail magazine bracket spring piece is fixed to the nail magazine bracket, and the other end is overlapped on the nail anvil assembly. The push knife plate assembly is arranged in the sleeve assembly and can move along the knife groove. There is an angle between the nail magazine bracket and the nail anvil, and the opening and closing degree of the angle can change during the movement of the push knife plate assembly.

[0014] As a further improvement of the present invention, the push blade plate assembly includes a push rod portion, a push blade portion and a reset hook. The push blade portion is fixedly connected to the push rod, and one end of the reset hook is fixedly connected to the push blade portion. During the movement of the push blade plate assembly toward the sliding cutting assembly, the reset hook can fit with the push blade portion under the extrusion of the cutting portion and can cause the cutting portion to rotate relative to the slider portion to expose the knife groove.

[0015] As a further improvement of the present invention, the knife pushing part includes an upper push plate, a lower push plate and a connecting plate, the upper push plate is arranged parallel to the lower push plate, the connecting plate is arranged vertically between the upper push plate and the lower push plate, the upper push plate is arranged above the nail magazine bracket, and the nail support seat assembly is provided with a through groove along its length direction, the through groove is located below the knife groove, the lower push plate is arranged at the bottom of the through groove, the push rod part is fixedly connected to the connecting plate, the reset hook is fixedly connected to the connecting plate, and the connecting plate can move in the knife groove and the through groove.

[0016] As a further improvement of the present invention, the nail magazine bracket includes a bracket body and a push plate moving channel opened on the bracket body, the bracket body is connected to the nail magazine, the upper surface of the bracket body is stepped, the bracket body is connected to the nail magazine bracket spring piece, the upper push plate can move in the push plate moving channel, and when the upper push plate moves in the direction away from the sleeve assembly, it can produce a pressing effect on the bracket body so that the angle between the nail magazine bracket and the nail support assembly becomes 0.

[0017] As a further improvement of the present invention, a protrusion is provided on the end of the bracket body away from the sleeve assembly, and a slot is provided at the corresponding position of the nail magazine. The bracket body cooperates with the slot through the protrusion to form a detachable connection with the nail magazine.

[0018] The laparoscopic cutting stapler assembly provided by the present invention includes a stapler body, a staple cartridge assembly, and a safety mechanism. The safety mechanism is disposed within the stapler assembly. The stapler assembly includes a staple cartridge and a slider cutting assembly. The slider cutting assembly and the safety mechanism are disposed within the stapler assembly, and the cutting blade thereof is disposed within a blade groove of the stapler assembly. When the stapler assembly is replaced, the slider cutting assembly and the safety mechanism can be replaced simultaneously. This allows the slider cutting assembly, the safety mechanism, and the stapler to be disposable components, ensuring the sharpness of the cutting blade during surgery while preventing the safety mechanism from failing due to repeated use, thereby improving surgical quality and reducing medical risks. Furthermore, some components within the stapler body can be reused, improving component utilization. The overall structure is simple, assembly is convenient, reliability is high, and product costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a schematic diagram of a laparoscopic cutting stapler assembly provided in an embodiment of the present invention;

[0021] Figure 2 is a structural exploded view of a staple cartridge assembly provided by an embodiment of the present invention;

[0022] Figure 3 1 is a schematic structural diagram of a slider cutting assembly provided by an embodiment of the present invention;

[0023] Figure 4 1 is a schematic structural diagram of a slider portion provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic structural diagram of a cutting portion provided by an embodiment of the present invention;

[0025] Figure 6 1 is a schematic structural diagram of a staple cartridge provided by an embodiment of the present invention;

[0026] Figure 7 yes Figure 6 Enlarged view of part A;

[0027] Figure 8 1 is a structural diagram of a nail magazine body provided by an embodiment of the present invention;

[0028] Figure 9 is a schematic structural diagram of a push plate assembly provided by an embodiment of the present invention;

[0029] Figure 10 is a schematic diagram of a cutting edge on a cutting portion provided by an embodiment of the present invention being accommodated in a cutting groove;

[0030] Figure 11 yes Figure 10 Enlarged view of part B;

[0031] Figure 12 This is a schematic diagram of the cooperation between the reset hook and the pusher portion provided by an embodiment of the present invention;

[0032] Figure 13 yes Figure 12 Enlarged view of part C;

[0033] Figure 141 is a schematic diagram of the reset process of the push blade plate assembly provided by an embodiment of the present invention;

[0034] Figure 15 yes Figure 14 Enlarged view of part E in the middle;

[0035] Figure 16 This is a first partial schematic diagram of the cooperation between the staple cartridge assembly and the safety torsion spring provided by an embodiment of the present invention;

[0036] Figure 17 This is a second partial schematic diagram of the cooperation between the staple cartridge assembly and the safety torsion spring provided by an embodiment of the present invention;

[0037] Figure 18 Schematic diagram of the cooperation between the staple cartridge assembly and the safety spring provided by an embodiment of the present invention;

[0038] Figure 19 yes Figure 18 Magnified view of part D.

[0039] Figure numerals: 1. Nail magazine assembly; 11. Nail magazine; 111. Accommodating portion; 112. Mounting hole; 113. Knife groove; 12. Nail pusher; 13. Slider cutting assembly; 131. Slider portion; 1311. Semicircular hole; 1312. Fitting portion; 132. Cutting portion; 1321. Rotating shaft; 2. Nail magazine body; 21. Nail magazine bracket; 22. Knife pusher plate assembly; 221. Knife pusher portion; 222. Reset hook; 223. Push rod; 23. Nail support assembly; 24. Sleeve assembly; 25. Nail magazine bracket shrapnel; 3. Safety torsion spring; 4. Safety shrapnel; 5. Fixed shaft. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0043] See also Figures 1-17 The present invention provides a laparoscopic cutting stapler assembly, comprising a staple magazine body 2, a staple cartridge assembly 1 and a safety mechanism, wherein the safety mechanism is arranged in the staple cartridge assembly 1, wherein the staple cartridge assembly 1 comprises a staple cartridge 11 and a slider cutting assembly 13, the slider cutting assembly 13 being slidably installed in the staple cartridge 11, the staple cartridge 11 being provided with a knife groove 113 along its length direction, and an accommodating portion 111 for installing the safety mechanism is formed at an end portion of the staple cartridge 11 near the push blade plate assembly 22 in the staple cartridge body 2; the safety mechanism has a storage state and a blocking state, wherein the safety mechanism in the storage state can allow the push blade plate assembly 22 to push the slider cutting assembly 13 in the knife groove 113 to move in a direction away from the sleeve assembly 24 of the staple cartridge body 2; when the push blade plate assembly 22 is reset, it can be disengaged from the sliding cutting assembly and can put the safety mechanism in the blocking state, and the safety mechanism in the blocking state can close the knife groove 113 to limit the distance that the push blade plate assembly 22 moves away from the sleeve assembly 24. The slider cutting assembly 13 and the safety mechanism in this embodiment are arranged in the nail magazine assembly 1, and the cutting knife is arranged in the knife groove 113 of the nail magazine assembly 1. When the nail magazine assembly 1 is replaced, the slider cutting assembly 13 and the safety mechanism can be replaced at the same time.

[0044] The slider cutting assembly 13 includes a slider portion 131 and a cutting portion 132. The slider portion 131 is slidably mounted within the blade slot 113. One end of the cutting portion 132 is pivotally connected to the slider portion 131. The cutting portion 132 herein refers to the cutting blade. The cutting edge of the cutting portion 132 is receivable within the blade slot 113. The push plate assembly 22 cooperates with the cutting portion 132, allowing the cutting portion 132 to rotate relative to the slider portion 131 under the thrust of the push plate assembly 22 until it is exposed within the blade slot 113.

[0045] Specifically, the tail end of the slider portion 131 (referring to the end close to the cutting portion 132) is provided with an incomplete circular hole (semi-circular hole 1311) for connecting with the cutting portion, and the cutting portion 132 is provided with an incomplete circular shaft for connecting with the slider portion 131. The incomplete circular shaft on the cutting portion 132 is arranged in the incomplete circular hole on the slider portion 131 and can rotate in the incomplete circular hole.

[0046] The ends of the slider portion 131 connected to the cutting portion 132 are respectively provided with mating portions 1312 that can cooperate with the safety mechanism. Safety mechanisms are respectively provided on both sides of the slider cutting assembly 13. The safety mechanisms in the retracted state can cooperate with the corresponding mating portions 1312 to expose the knife groove 113. The safety mechanism can disengage from the mating portion 1312 and abut against the push plate assembly 22 when the push plate assembly 22 pushes the slider cutting assembly 13 to move away from the sleeve assembly 24.

[0047] The safety mechanism includes a safety torsion spring 3 and a torsion spring shaft. The safety torsion spring 3 is sleeved on the torsion spring shaft. A mounting hole 112 for mounting the torsion spring shaft is provided in the accommodation portion 111. The safety torsion spring 3 is mounted in the accommodation portion 111 through the torsion spring shaft. The slider portion 131 and the cutting portion 132 are hinged through an incomplete circular hole and an incomplete circular shaft (rotating shaft 1321). Figure 3 The position of the cutting portion 132 shown in the figure is the initial position. The slider 131 and the nail pusher 12 are slid into the nail magazine 11, and the cutting portion 132 just falls into the knife groove 113, that is, the slider 131 can slide along the length direction of the knife groove 113 of the nail magazine 11. When the cutting portion 132 on the slider cutting assembly 13 is not subjected to external force (the thrust of the knife pusher plate), the cutting edge of the cutting portion 132 is received in the knife groove 113 of the nail magazine 11, as shown in FIG. Figure 10 and Figure 11 shown.

[0048] In this embodiment, the nail magazine body 2 includes a nail magazine support 21, a nail support assembly 23, a blade pusher assembly 22, a sleeve assembly 24 and a nail magazine support spring 25. Figure 8 shown.

[0049] The staple cartridge bracket 21 is hingedly connected to the sleeve assembly 24 and is detachably connected to the staple cartridge 11. The anvil assembly 23 is fixedly connected to the sleeve assembly 24. One end of the staple cartridge bracket spring 25 is fixedly connected to the staple cartridge bracket 21, and the other end is movably connected to the anvil assembly 23. The pusher plate assembly 22 is disposed within the sleeve assembly 24 and is movable along the blade slot 113. An angle is formed between the staple cartridge bracket 21 and the anvil, and the degree of the angle can be changed during the movement of the pusher plate assembly 22.

[0050] The push blade assembly 22 includes a push rod 223, a push blade portion 221 and a reset hook 222. The push blade portion 221 is fixedly connected to the push rod 223. One end of the reset hook 222 is fixedly connected to the push blade portion 221, and the other end is tilted. Figure 9 shown, and Figure 9 The state shown is the natural state of the reset hook 222. As the push blade assembly 22 moves toward the sliding cutting assembly, the reset hook 222 can be pressed against the push blade portion 221 by the cutting portion 132, and the cutting portion 132 can be rotated relative to the slider portion 131 to expose the blade groove 113.

[0051] The pusher part 221 is similar to the "I" shape, including an upper push plate, a lower push plate and a connecting plate. The upper push plate is arranged parallel to the lower push plate, and the connecting plate is arranged vertically between the upper push plate and the lower push plate. The upper push plate is arranged above the nail magazine bracket 21, and the nail support assembly 23 is provided with a through groove along its length direction. The through groove is located directly below the knife groove 113, and the lower push plate is arranged at the bottom of the through groove. The push rod 223 is fixedly connected to the connecting plate, and the reset hook 222 is fixedly connected to the connecting plate. The connecting plate can move in the knife groove 113 and the through groove.

[0052] The nail magazine bracket 21 includes a bracket body and a push plate moving channel opened on the bracket body. The bracket body is connected to the nail magazine 11. The upper surface of the bracket body is stepped. The bracket body is connected to the nail magazine bracket spring piece 25. The upper push plate can move in the push plate moving channel. When the upper push plate moves in the direction away from the sleeve assembly 24, it can press the bracket body to make the angle between the nail magazine bracket 21 and the nail support assembly 23 become 0.

[0053] A protrusion is provided on the end of the bracket body away from the sleeve assembly 24, and a card slot is provided at the corresponding position of the nail magazine 11. The bracket body cooperates with the card slot through the protrusion to form a detachable connection with the nail magazine 11. The structure is simple and easy to disassemble and assemble.

[0054] The working states of the laparoscopic cutting stapler assembly provided by the present invention are divided into two situations: the staple magazine body 2 is loaded with a normal staple magazine assembly 1 (an unused staple magazine assembly 1) and the staple magazine body 2 is loaded with a used staple magazine assembly 1.

[0055] When a normal staple cartridge assembly 1 is loaded into the magazine body 2, the pusher plate assembly 22 can be pushed out normally and can move through its full range. When a used staple cartridge assembly 1 is loaded into the magazine body 2, the pusher plate assembly 22 can only move a very short distance, i.e., the safety mechanism limits the movement of the pusher plate assembly 22. In other words, if the staple cartridge assembly 1 has been used, the slider cutting assembly 13 will not be in its initial position. Therefore, whether the slider cutting assembly 13 is in its initial position is the primary basis for determining whether the staple cartridge 11 has been used.

[0056] When the nail magazine body 2 is loaded into the normal nail magazine 11: in the initial state, the nail magazine bracket 21 is acted upon by the nail magazine bracket spring 25 and an angle exists between it and the nail anvil assembly 23; at this time, in the nail magazine assembly 1, since the slider cutting assembly 13 is in the initial position, the matching portion 1312 at the rear end of the slider portion 131 has a shielding effect on the safety torsion spring 3, so the knife groove 113 in the nail magazine 11 is not closed, and the cutting portion 132 is also received in the knife groove 113 of the nail magazine 11. Figure 14 As shown. When the pusher plate assembly 22 moves a distance to the left (away from the sleeve assembly 24), the nail magazine support 21 rotates under the action of the pusher portion 221, and finally the angle between the nail magazine support 21 and the nail support assembly 23 becomes 0. During this process, the nail magazine support spring 25 is pressed by the nail magazine support 21 and deformed, and the cutting portion 132 also rotates under the action of the pusher plate assembly 22, and finally the cutting edge of the cutting portion 132 exposes the knife groove 113 of the nail magazine 11, and the reset hook 222 is also squeezed by the cutting portion 132 and fits tightly with the pusher portion 221, as shown. Figure 13 If the push blade assembly 22 continues to move to the left, the slider cutting assembly 13 will be out of contact with the safety torsion spring 3. After that, the safety torsion spring 3 will overlap the push blade assembly 22, so the push blade assembly 22 can continue to move to the left to complete the cutting process. When the push blade assembly 22 gradually moves to the right (reset), the reset hook 222 is also gradually popped up, as shown in FIG. Figure 14 and Figure 15 As shown, during the reset process of the blade pusher assembly 22, the reset hook 222 hooks onto the cutting portion 132, causing the cutting portion 132 to rotate counterclockwise about its incomplete circular axis. When the cutting portion 132 is fully reset, the reset hook 222 also disengages from the cutting portion 132 and continues to reset to the right. When the blade pusher assembly 22 is fully reset, the magazine support 21 also rotates under the action of the magazine support spring 25, thereby restoring the angle between it and the anvil assembly 23.

[0057] When the used nail magazine assembly 1 is loaded into the nail magazine body 2: As mentioned above, when the used nail magazine assembly 1 is loaded into the nail magazine body 2, since the slider cutting assembly 13 in the nail magazine assembly 1 is no longer in the initial position, the slider portion 131 cannot play a shielding role on the safety torsion spring 3, and the safety torsion spring 3 rotates around the torsion spring axis, thereby closing the knife groove 113 in the nail magazine 11. Figure 17 As shown, at this time, the push blade assembly 22 cannot exceed the limit of the safety torsion spring 3 and continue to move to the left.

[0058] In addition, another implementation method of the insurance agency is as follows Figure 18 and Figure 19 As shown, the safety torsion spring 3 can also be replaced by a safety spring 4. Specifically, the safety mechanism in this embodiment includes a safety spring 4 and a fixed shaft 5. On both sides of the end of the nail magazine 11 near the push plate assembly 22 in the nail magazine body 2, there are respectively provided with a receiving portion 111 for installing the safety mechanism. The receiving portion 111 is in the shape of an open slot. The fixed shaft 5 is fixedly arranged in the corresponding receiving portion 111. One end of the safety spring 4 is bent and wrapped around the outer periphery of the corresponding fixed shaft 5. In the initial state, the other end of the safety spring 4 abuts against the slider cutting assembly 13. When the push plate assembly 22 pushes the slider cutting assembly 13 to move away from the sleeve assembly 24, , which can make the safety spring piece 4 disengage from the contact with the slider cutting assembly 13, so that the safety spring piece 4 can overlap on the push blade plate assembly 22, so that the push blade plate assembly 22 can continue to move to the left to complete the cutting process; when the push blade plate assembly 22 gradually moves in the direction close to the sleeve assembly 24 (reset), the reset hook 222 is also gradually bounced up, so during the reset process of the push blade plate assembly 22, the reset hook 222 will hook the cutting part 132, causing the cutting part 132 to rotate counterclockwise around its incomplete circular axis, and when the cutting part 132 is reset, the reset hook 222 also disengages from the cutting part 132. When the push blade assembly 22 completes its reset, since the slider cutting assembly 13 in the nail magazine assembly 1 is no longer in the initial position, the cutting portion 132 cannot block the safety spring 4. The two safety springs 4 abut against each other under the action of elastic force, thereby closing the knife groove 113 in the nail magazine 11. At this time, the push blade assembly 22 cannot exceed the restriction of the safety spring 4 and continue to move away from the sleeve assembly 24. Its working principle is similar to that of the safety torsion spring 3.

[0059] The laparoscopic cutting stapler assembly provided by the present invention has a cutting portion 132 that can be replaced together with the staple cartridge 11 and has a novel safety mechanism, a simple structure, convenient assembly, and high reliability.

[0060] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A laparoscopic cutting stapler assembly, characterized in that: It includes a nail magazine body, a nail magazine assembly and a safety mechanism, wherein the safety mechanism is arranged in the nail magazine assembly, wherein: The nail magazine assembly includes a nail magazine and a slider cutting assembly. The slider cutting assembly is slidably installed in the nail magazine. The nail magazine is provided with a knife groove along its length. The end of the nail magazine near the push plate assembly in the nail magazine body is formed with a receiving portion for installing the safety mechanism. The safety mechanism has a retracted state and a blocked state. In the retracted state, the safety mechanism allows the push blade plate assembly to push the slider cutting assembly to move in the knife groove in a direction away from the sleeve assembly of the nail magazine body; when the push blade plate assembly is reset, it can be disengaged from the slider cutting assembly and the safety mechanism can be in the blocked state. In the blocked state, the safety mechanism can close the knife groove to limit the distance that the push blade plate assembly moves away from the sleeve assembly. The slider cutting assembly includes a slider portion and a cutting portion, the slider portion being slidably mounted in the knife groove, one end of the cutting portion being rotatably connected to the slider portion, the cutting edge of the cutting portion being receivable in the knife groove, and the push blade assembly being capable of cooperating with the cutting portion so that the cutting portion is rotated relative to the slider portion to a position where the knife groove is exposed under the thrust of the push blade assembly; The end portion of the slider portion connected to the cutting portion is provided with mating portions capable of mating with the safety mechanism on both sides, and the safety mechanism is provided on both sides of the slider cutting assembly. The safety mechanism in the retracted state can be mated with the corresponding mating portion to expose the knife groove, and the safety mechanism can be disengaged from the mating portion and abut against the push blade plate assembly when the push blade plate assembly pushes the slider cutting assembly in a direction away from the sleeve assembly; The safety mechanism includes a safety torsion spring and a torsion spring shaft, wherein the safety torsion spring is sleeved on the torsion spring shaft, and a mounting hole for mounting the torsion spring shaft is provided in the accommodation portion. The safety torsion spring is mounted in the accommodation portion through the torsion spring shaft, and the matching portion of the slider portion can match with the safety torsion spring to prevent the safety torsion spring from closing the knife slot; The nail magazine body includes a nail magazine bracket, a nail anvil assembly, a push knife plate assembly, a sleeve assembly and a nail magazine bracket spring piece, the nail magazine bracket is hinged on the sleeve assembly and forms a detachable connection with the nail magazine, the nail anvil assembly is fixed to the sleeve assembly, one end of the nail magazine bracket spring piece is fixed to the nail magazine bracket, and the other end is overlapped on the nail anvil assembly, the push knife plate assembly is arranged in the sleeve assembly and can move along the knife groove, there is an angle between the nail magazine bracket and the nail anvil, and the opening and closing degree of the angle can change during the movement of the push knife plate assembly; The push blade plate assembly includes a push rod portion, a push blade portion, and a reset hook. The push blade portion is fixedly connected to the push rod portion, and one end of the reset hook is fixedly connected to the push blade portion. When the push blade plate assembly moves toward the slider cutting assembly, the reset hook can fit with the push blade portion under the squeezing action of the cutting portion and can cause the cutting portion to rotate relative to the slider portion to expose the knife groove. The knife pushing portion includes an upper pushing plate, a lower pushing plate and a connecting plate, the upper pushing plate is arranged parallel to the lower pushing plate, the connecting plate is vertically arranged between the upper pushing plate and the lower pushing plate, the upper pushing plate is arranged above the nail magazine bracket, the nail support assembly is provided with a through slot along its length direction, the through slot is located below the knife slot, the lower pushing plate is arranged at the bottom of the through slot, the push rod portion is fixedly connected to the connecting plate, the reset hook is fixedly connected to the connecting plate, and the connecting plate can move in the knife slot and the through slot; The nail magazine bracket includes a bracket body and a push plate moving channel provided on the bracket body, the bracket body is connected to the nail magazine, the upper surface of the bracket body is stepped, the bracket body is connected to the nail magazine bracket spring piece, the upper push plate can move within the push plate moving channel, and when the upper push plate moves in a direction away from the sleeve assembly, it can press the bracket body so that the angle between the nail magazine bracket and the nail seat assembly becomes 0; A protrusion is provided on the end of the bracket body away from the sleeve assembly, and a slot is provided at a corresponding position of the nail magazine. The bracket body cooperates with the slot through the protrusion to form a detachable connection with the nail magazine.

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