Anastomat

Abstract

The present invention relates to an anastomat, comprising: a main body, which is provided with two mounting portions arranged opposite to each other, wherein a movable groove is provided between the two mounting portions; an anvil assembly, which is fixedly mounted on the main body; a staple cartridge base, which is hinged on the main body, wherein a jaw is formed between the anvil assembly and the staple cartridge base, and the mounting portions are located in the jaw; a staple cartridge assembly, which comprises a staple cartridge arranged in the jaw and a sliding block sliding in a length direction of the staple cartridge; a cutter assembly, which is mounted in the movable groove and slidable in an axial direction of the main body; two mounting seats, which are arranged opposite to each other, symmetrically arranged along the plane of the cutter assembly and mounted on the mounting portions; and a locking assembly, which comprises two locking mechanisms symmetrically arranged along the plane of the cutter assembly. In a first state, the two locking mechanisms abut against the cutter assembly. In a second state, the two locking mechanisms are separated from the cutter assembly. The cutter assembly is prevented from advancing by means of the locking mechanisms, thereby preventing false triggering; and human tissue is prevented from being cut leading to the inability to suture, thereby improving the safety of the anastomat.

Description

stapler Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a stapler that cannot be fired without staples. Background Art

[0002] A stapler typically consists of two parts: the main body and the stapler assembly. The main body is the actuator, responsible for clamping tissue, firing for cutting and stapling, and resetting. The stapler assembly is a removable unit that provides the staples needed to staple tissue. When using existing staplers for surgery, if the stapler is fired without a loaded stapler assembly or with a used stapler assembly, due to misoperation, the tissue may be cut without suturing, causing significant bleeding in the patient.

[0003] Therefore, in order to solve the above technical problems, it is necessary to provide a stapler that cannot be fired without staples.

[0004] Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a stapler that cannot be fired without staples.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by one embodiment of the present invention is as follows:

[0007] A stapler comprises a main body, a stapler seat assembly, a staple magazine base, a stapler brake assembly, a cutting knife assembly, two mounting seats arranged opposite to each other and a locking assembly. The main body has two mounting parts arranged opposite to each other, and a movable groove is provided between the two mounting parts; the nail anvil assembly is fixedly mounted on the main body; the nail magazine base is hingedly mounted on the main body, a jaws is formed between the nail anvil assembly and the nail magazine base, and the mounting part is located in the jaws; the nail gate assembly includes a nail gate and a slider arranged in the jaws, and the slider slides along the length direction of the nail magazine; the cutting knife assembly is slidably mounted in the main body along the axial direction of the main body and is at least partially inserted into the movable groove; the two mounting seats arranged opposite to each other are symmetrically arranged along the plane of the cutting knife assembly and are respectively fixedly mounted on the corresponding mounting parts; the locking assembly includes two locking mechanisms symmetrically arranged along the plane of the cutting knife assembly, and the locking mechanisms are rotatably mounted between the mounting part and the mounting seat; in a first state, the two locking mechanisms are both in contact with the cutting knife assembly, and the cutting knife assembly is locked in the main body; in a second state, the two locking mechanisms are both separated from the cutting knife assembly, and the cutting knife assembly slides along the axial direction of the main body toward the distal end.

[0008] In one embodiment, the locking mechanism includes a locking member and a reset elastic member. The locking member is rotatably installed between the mounting portion and the mounting seat. The first end of the reset elastic member abuts against the locking member, and the second end abuts against the mounting portion.

[0009] In one embodiment, the locking member includes a force-bearing portion arranged away from the plane direction of the cutting knife assembly, a stop portion that abuts against the cutting knife assembly, and a connecting portion connecting the force-bearing portion and the stop portion, and the connecting portion is rotatably installed between the mounting portion and the mounting seat.

[0010] In one embodiment, an abutting portion is provided on the mounting portion extending toward the distal end, the abutting portion is located above the force-bearing portion, and the resetting elastic member is located between the abutting portion and the force-bearing portion.

[0011] In one embodiment, an abutting column is provided on the force-bearing portion, and the first end of the reset elastic member is located between the abutting column and the rotating portion.

[0012] In one embodiment, one of the connecting portion and the mounting seat is provided with a first column, and the other is provided with a first assembly hole that cooperates with the first column. One of the connecting portion and the mounting portion is provided with a second column, and the other is provided with a second assembly hole that cooperates with the second column. The first assembly hole and the second assembly hole are coaxially arranged and parallel to the axial direction of the main body.

[0013] In one embodiment, a limiting portion is provided on the side wall of the first column and / or the second column extending outward, and a stop groove cooperating with the limiting portion is provided on the hole wall of the first assembly hole and / or the second assembly hole. In the first state, the limiting portion and the stop groove are abutted away from the first side wall of the cutting knife assembly, and in the second state, the limiting portion and the stop groove are abutted close to the second side wall of the cutting knife assembly.

[0014] In one embodiment, the slider is located at the proximal end of the nail gate in the initial state; in the first state, an angle is formed between the nail magazine base and the nail anvil assembly, and the slider is separated from the force-bearing parts of the two locking members; in the second state, the nail magazine base is parallel to the nail anvil assembly, and the slider is in contact with the force-bearing parts of the two locking members.

[0015] In one embodiment, the slider includes two bosses, and the two bosses push the locking mechanism to rotate.

[0016] In one embodiment, the mounting seat includes a support plate and a bent plate bent on the support plate. One of the mounting portion and the support plate is provided with a mounting column, and the other is provided with a mounting hole.

[0017] In one embodiment, a mounting groove is formed on the mounting portion, and a positioning protrusion corresponding to the mounting groove is extended from the support plate toward the mounting portion.

[0018] The present invention has the following beneficial effects:

[0019] The present invention provides a stapler, which can prevent a cutting knife assembly from advancing by a locking mechanism in a locking assembly when a used stapler magazine assembly is assembled in the stapler, making it impossible to perform a firing operation. This can prevent the stapler from being triggered by mistake, avoid accidents in which human tissue is cut and cannot be sutured by the stapler, avoid causing heavy bleeding in the patient, and improve the safety of the stapler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] FIG1 is a schematic diagram of an exploded structure of a stapler according to a specific embodiment of the present invention;

[0022] FIG2 is a schematic structural diagram of a stapler in a closed state according to a specific embodiment of the present invention;

[0023] FIG3 is a schematic structural diagram of a stapler in an open state according to a specific embodiment of the present invention;

[0024] FIG4 is a schematic structural diagram of a cutting knife assembly in a stapler sliding toward the distal end in a specific embodiment of the present invention;

[0025] FIG5 is a side view of a partial structure of a stapler in a first state according to a specific embodiment of the present invention;

[0026] FIG6 is a side view of a partial structure of the stapler in a second state according to a specific embodiment of the present invention;

[0027] FIG. 7 is a schematic diagram of an exploded structure of a portion of the structure of the stapler in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the application is conventionally placed when in use, or are the orientation or position relationship conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", etc. used herein do not specifically refer to order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0034] It should be noted that, to more clearly describe the structure, the term "distal end" is defined herein to mean the end away from the operator during operation, and the term "proximal end" is defined herein to mean the end closer to the operator during operation. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0036] The technical solution of the present invention will be described below with reference to the accompanying drawings.

[0037] 1 to 4 , a stapler according to a specific embodiment of the present invention includes a main body 1 , a stapler assembly 2 , a staple magazine base 3 , a staple gate assembly 8 , a cutting knife assembly 4 , a symmetrically arranged first mounting seat 61 and a second mounting seat 62 , and a locking assembly 7 . Among them, the main body 1 has a first mounting portion 51 and a second mounting portion 52 arranged opposite to each other, and a movable groove is provided between the first mounting portion 51 and the second mounting portion 52; the nail anvil assembly 2 is fixedly mounted on the main body 1; the nail magazine base 3 is hingedly mounted on the main body 1, and a jaw is formed between the nail anvil assembly 2 and the nail magazine base 3, and the first mounting portion 51 and the second mounting portion 52 are located in the jaw; the nail gate assembly 8 includes a nail gate 81 and a slider 82 arranged in the jaw, and the slider 82 slides along the length direction of the nail magazine 81; the cutting knife assembly 4 is axially slidably installed in the main body 1 and is at least partially inserted in the movable groove; the first mounting seat 61 and the second mounting seat 62 are symmetrically arranged along the plane of the cutting knife assembly 4 and are fixedly mounted on the first mounting portion 51 and the second mounting portion 52 respectively; the locking assembly 7 includes a first locking mechanism and a second locking mechanism symmetrically arranged along the plane of the cutting knife assembly 4, the first locking mechanism is rotatably installed between the first mounting portion 51 and the first mounting seat 61, and the second locking mechanism is rotatably installed between the second mounting portion 52 and the second mounting seat 62. In the first state, both the first and second locking mechanisms abut against the cutting blade assembly 4, locking the cutting blade assembly 4 within the main body 1. The first and second locking mechanisms may abut against each other or have a gap therebetween. In the second state, both the first and second locking mechanisms are separated from the cutting blade assembly 4, allowing the cutting blade assembly 4 to slide axially toward the distal end of the main body 1.

[0038] When the stapler magazine assembly 8 is not loaded, the first and second locking mechanisms abut against the cutter assembly 4, preventing the cutter assembly 4 from advancing and firing. This achieves the safety purpose of preventing the stapler from firing when the stapler magazine assembly 8 is not loaded. This design prevents the stapler from being accidentally triggered when the stapler magazine assembly 8 is not loaded, avoiding accidents such as human tissue being cut and unable to be sutured by the stapler, preventing heavy bleeding in the patient, and improving the safety of the stapler.

[0039] 5 and 6 , the first locking mechanism includes a first locking member 71 and a first return elastic member 73. The first locking member 71 is rotatably mounted between the first mounting portion 51 and the first mounting seat 61. The first end of the first return elastic member 73 abuts against the first locking member 71, and the second end abuts against the first mounting portion 51. The second locking mechanism includes a second locking member 72 and a second return elastic member 74. The second locking member 72 is rotatably mounted between the second mounting portion 52 and the second mounting seat 62. The first end of the second return elastic member 74 abuts against the second locking member 72, and the second end abuts against the second mounting portion 52. The first return elastic member 73 and the second return elastic member 74 are any structure that can provide elastic force, such as a spring, a compression spring, a leaf spring, an airbag, etc., which can be understood and accepted by those skilled in the art.

[0040] Specifically, as shown in Figure 7, the first locking member 71 in this embodiment includes a first force-bearing portion 711 disposed in a plane direction away from the cutting blade assembly 4, a first stop portion 712 abutting against the cutting blade assembly 4, and a first connecting portion 713 connecting the first force-bearing portion 711 and the first stop portion 712. The first connecting portion 713 is rotatably mounted between the first mounting portion 51 and the first mounting seat 61. The second locking member 72 includes a second force-bearing portion 721 disposed in a plane direction away from the cutting blade assembly 4, a second stop portion 722 abutting against the cutting blade assembly 4, and a second connecting portion 723 connecting the second force-bearing portion 721 and the second stop portion 722. The second connecting portion 723 is rotatably mounted between the second mounting portion 52 and the second mounting seat 62.

[0041] 1 , the slider 82 is provided with a first boss 821 corresponding to the first force-bearing portion 711 , and the slider 82 is provided with a second boss 822 corresponding to the second force-bearing portion 721 . The first boss 821 and the second boss 822 can respectively push the first force-bearing portion 711 and the second force-bearing portion 721 to rotate, thereby driving the first locking member 71 and the second locking member 72 to rotate.

[0042] In the first state, the elastic force of the first return elastic member 73 acts on the first force-bearing portion 711, causing the first stop portion 712 to remain in contact with the cutting blade assembly 4. The elastic force of the second return elastic member 74 acts on the second force-bearing portion 721, causing the second stop portion 722 to remain in contact with the cutting blade assembly 4. In the second state, the first and second bosses 821 and 822 of the slider 82 respectively abut the first and second force-bearing portions 711 and 721. When the magazine base 3 is rotated toward the anvil assembly 2, the first and second bosses 821 and 822 of the slider 82 exert external forces on the first and second force-bearing portions 711 and 721, respectively, driving the first and second locking members 71 and 72 to rotate parallel to the axis of the main body 1. This allows the first and second stop portions 712 and 722 to separate from the cutting blade assembly 4, removing the obstruction to the cutting blade assembly 4 and allowing the cutting blade assembly 4 to fire smoothly, completing cutting and suturing. Based on this design, the safe operation of the anastomosis device is improved, avoiding the situation where the patient is mistakenly cut and cannot be sutured in time.

[0043] Further, referring to Figures 5 to 7, in order to facilitate the elastic force of the first return elastic member 73 to be applied to the first force-bearing portion 711 and the elastic force of the second return elastic member 74 to be applied to the second force-bearing portion 721, the first mounting portion 51 in this embodiment is provided with a first abutting portion 511 extending toward the distal end, the first abutting portion 511 is located above the first force-bearing portion 711, and the first return elastic member 73 is located between the first abutting portion 511 and the first force-bearing portion 711; the second mounting portion 52 is provided with a second abutting portion 521 extending toward the distal end, the second abutting portion 521 is located above the second force-bearing portion 721, and the second return elastic member 74 is located between the second abutting portion 521 and the second force-bearing portion 721.

[0044] Preferably, as shown in FIG7 , in order to prevent the first return elastic member 73 from being disengaged from between the first abutting portion 511 and the first force-bearing portion 711 and to prevent the second return elastic member 74 from being disengaged from between the second abutting portion 521 and the second force-bearing portion 721, in this embodiment, a first abutting post 7111 is provided on the first force-bearing portion 711, and the first end of the first return elastic member 73 is located between the first abutting post 7111 and the first rotating portion; a second abutting post 7211 is provided on the second force-bearing portion 721, and the first end of the second return elastic member 74 is located between the second abutting post 7211 and the second rotating portion. Preferably, the first end of the first return elastic member 73 is sleeved on the first abutting post 7111, and the first end of the second return elastic member 74 is sleeved on the second abutting post 7211. Preferably, the first force-bearing portion 711 is provided with a first fixing groove, in which the second end of the first reset elastic member 73 is installed, and the second force-bearing portion 721 is provided with a second fixing groove, in which the second end of the second reset elastic member 74 is installed.

[0045] As shown in Figure 7, in this embodiment, the first connecting portion 713 is provided with a first column 7131, the first mounting seat 61 is provided with a first assembly hole 6121 that cooperates with the first column 7131, the first connecting portion 713 is provided with a second column 7132, the first mounting portion 51 is provided with a second assembly hole 512 that cooperates with the second column 7132, the first assembly hole 6121 on the first mounting seat 61 and the second assembly hole 512 on the first mounting portion 51 are coaxially arranged and parallel to the axial direction of the main body 1; the second connecting portion 723 is provided with a first column 7231, the second mounting seat 62 is provided with a first assembly hole 6221 that cooperates with the first column 7231, the second connecting portion 723 is provided with a second column 7232, and the second mounting portion 52 is provided with a second assembly hole 522 that cooperates with the second column 7232, the first assembly hole 6221 on the second mounting seat 62 and the second assembly hole 522 on the second mounting portion 52 are coaxially arranged and parallel to the axial direction of the main body 1.

[0046] According to this design, the first locking member 71 can be installed between the first mounting portion 51 and the first mounting seat 61 by rotating in a direction parallel to the axis of the main body 1, and the second locking member 72 can be installed between the second mounting portion 52 and the second mounting seat 62 by rotating in a direction parallel to the axis of the main body 1. There is no need to additionally set up a fixing pin shaft, and the integrated design makes the structure of the locking assembly 7 more stable and reliable.

[0047] Of course, the present invention is not limited to this. The first connecting portion 713 may be provided with a first assembly hole 6121, and the first mounting seat 61 may be provided with a first column 7131 that cooperates with the first assembly hole 6121; or, the first connecting portion 713 may be provided with a second assembly hole 512, and the first mounting portion 51 may be provided with a second column 7132 that cooperates with the second assembly hole 512; or, the second connecting portion 723 may be provided with a first assembly hole 6221, and the second mounting seat 62 may be provided with a first column 7231 that cooperates with the first assembly hole 6221; or, the second connecting portion 723 may be provided with a second assembly hole 522, and the second mounting portion 52 may be provided with a second column 7232 that cooperates with the second assembly hole 522. All of these may achieve the technical effects of the present invention and are within the scope of protection. These are understandable and acceptable to those skilled in the art.

[0048] Preferably, with reference to Figures 1 and 7, in this embodiment, the sidewall of the second column 7132 on the first connecting portion 713 extends outwardly and is provided with a first limiting portion, the sidewall of the second column 7232 on the second connecting portion 723 extends outwardly and is provided with a second limiting portion 7233, the hole wall of the second assembly hole 512 on the first mounting portion 51 is provided with a first stop groove 513 that cooperates with the first limiting portion, and the hole wall of the second assembly hole 522 on the second mounting portion 52 is provided with a second stop groove 523 that cooperates with the second limiting portion 7233. In the first state, the first limiting portion abuts against the first sidewall of the first stop groove 513 away from the cutting blade assembly 4, and the second limiting portion 7233 abuts against the first sidewall of the second stop groove 523 away from the cutting blade assembly 4. In the second state, the first limiting portion abuts against the second side wall of the first stopping groove 513 near the cutting blade assembly 4, and the second limiting portion 7233 abuts against the second side wall of the second stopping groove 523 near the cutting blade assembly 4. This design can control the angle of rotation of the first locking member 71 and the second locking member 72 around the axis, preventing the first locking member 71 and the second locking member 72 from being too far away from the cutting blade assembly 4 or from excessively abutting against each other, which would result in excessive abutting force between the two.

[0049] Of course, the present invention is not limited to this. When a limiting portion is provided on the first column 7131 of the first connecting portion 713 and the first column 7231 of the second connecting portion 723, a stop groove matching the limiting portion is provided on the hole wall of the first assembly hole 6121 of the first mounting seat 61 and the first assembly hole 6221 of the second mounting seat 62, both of which can achieve the technical effects of the present invention and are within the scope of protection. These are understandable and acceptable to those skilled in the art.

[0050] Referring to Figures 1 to 3 , in a preferred embodiment, the slider 82 is initially positioned proximal to the stapler gate 81. In the first state, the stapler jaws are open, an angle is formed between the magazine base 3 and the anvil assembly 2, and the slider 82 is disengaged from both locking mechanisms. In the second state, the stapler jaws are closed, the slider 82 is positioned proximal to the stapler magazine 81, the magazine base 3 is parallel to the anvil assembly 2, and the first and second bosses 821, 822 of the slider 82 abut against the first and second force-bearing portions 711, 721, respectively.

[0051] As will be appreciated, when the stapler of this embodiment is loaded with the magazine assembly 8, which comprises a magazine 81, a slider 82, and a magazine bracket 83, if the magazine assembly 8 is used, the slider 82 on the magazine 81 is located at the end away from the cutter assembly 4, thereby disengaging the slider 82 from the locking assembly 7. In the first state, the slider 82 cannot exert external force on the first and second locking members 71, 72. The first and second locking members 71, 72 remain in contact with the cutter assembly 4, preventing the cutter assembly 4 from advancing and firing. This achieves the safety purpose of preventing the stapler from firing when a used magazine assembly 8 is loaded. In the second state, since the magazine assembly 8 is unused, the slider 82 on the magazine 81 is located at the end closer to the cutter assembly 4, thereby contacting both the first and second locking members 71, 72. In the second state, the slider 82 can apply external force to the first locking member 71 and the second locking member 72, and the first locking member 71 and the second locking member 72 are separated from the cutting knife assembly 4, thereby removing the obstruction to the cutting knife assembly 4, so that the cutting knife assembly 4 can be fired smoothly to complete cutting and suturing.

[0052] According to this design, during the movement of the cutter, the magazine base 3 drives the magazine 81 and the slider 82 to rotate until the magazine base 3 is parallel to the anvil assembly 2. During the rotation of the slider 82 at the proximal end of the magazine base 3, the two bosses push the force-bearing portion of the locking mechanism to rotate together. At this time, the stop portion of the locking mechanism slowly moves away from the plane of the cutter assembly 4, and the cutter can smoothly pass the stop portion and move toward the distal end of the stapler. After the magazine 81 is used, the slider 82 is pushed to the distal end of the magazine base 3 by the cutter and will not return to its original position with the cutter. At this time, if the instrument is operated again, because the slider 82 is at the distal end of the magazine base 3, it cannot push the locking mechanism. The cutter can only move to the stop portion of the locking mechanism and cannot move further forward. This prevents the used magazine 81 from being reused, avoids the serious medical accident of incising tissue without suturing the incision with titanium staples if the used magazine 81 is used again, and improves the safety of the stapler.

[0053] As shown in Figure 7, in order to facilitate the fixed installation of the first mounting seat 61 on the first mounting portion 51 and the fixed installation of the second mounting seat 62 on the second mounting portion 52, the first mounting seat 61 in this embodiment includes a first support plate 611 and a first bent plate 612 bent on the first support plate 611, the first mounting portion 51 is provided with a first mounting column 514, and the first support plate 611 is provided with a first mounting hole 6111; the second mounting seat 62 includes a second support plate 621 and a second bent plate 622 bent on the second support plate 621, the second mounting portion 52 is provided with a second mounting column 524, and the second support plate 621 is provided with a second mounting hole 6211.

[0054] Preferably, in this embodiment, the first mounting portion 51 defines a first mounting slot 515, and the first support plate 611 extends toward the first mounting portion 51 and is provided with a first positioning protrusion 6112 corresponding to the first mounting slot 515. The second mounting portion 52 defines a second mounting slot 525, and the second support plate 621 extends toward the second mounting portion 52 and is provided with a second positioning protrusion 6212 corresponding to the second mounting slot 525. This design simplifies the installation process and increases installation speed through alignment.

[0055] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0056] The present invention provides a stapler, which can prevent a cutting knife assembly from advancing by a locking mechanism in a locking assembly when a used stapler magazine assembly is assembled in the stapler, making it impossible to perform a firing operation. This can prevent the stapler from being triggered by mistake, avoid accidents in which human tissue is cut and cannot be sutured by the stapler, avoid causing heavy bleeding in the patient, and improve the safety of the stapler.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and all variations coming within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0058] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stapler, characterized in that: The stapler comprises: A main body, wherein the main body has two mounting parts arranged opposite to each other, and a movable groove is provided between the two mounting parts; An anvil assembly, fixedly mounted on the main body; A nail magazine base is hingedly mounted on the main body, a jaw is formed between the nail anvil assembly and the nail magazine base, and the mounting portion is located in the jaw; A nail gate assembly, the nail gate assembly comprising a nail gate and a slider disposed in the jaws, the slider sliding along the length direction of the nail magazine; A cutting blade assembly is slidably installed in the main body along the axial direction of the main body and is at least partially inserted in the movable groove; Two mounting seats arranged opposite to each other are symmetrically arranged along the plane of the cutting blade assembly and are respectively fixedly mounted on the corresponding mounting parts; A locking assembly, the locking assembly comprising two locking mechanisms symmetrically arranged along the plane of the cutting blade assembly, the locking mechanisms being rotatably mounted between the mounting portion and the mounting seat; In the first state, the two locking mechanisms are in contact with the cutting blade assembly, and the cutting blade assembly is locked in the main body; In the second state, the two locking mechanisms are separated from the cutting blade assembly, and the cutting blade assembly slides along the axial direction of the main body toward the distal end.

2. The stapler according to claim 1, characterized in that: The locking mechanism comprises a locking member and a resetting elastic member. The locking member is rotatably mounted between the mounting portion and the mounting seat. The first end of the resetting elastic member abuts against the locking member, and the second end abuts against the mounting portion.

3. The stapler according to claim 2, characterized in that: The locking member includes a force-bearing portion arranged away from the plane direction of the cutting blade assembly, a stopping portion abutting against the cutting blade assembly, and a connecting portion connecting the force-bearing portion and the stopping portion, wherein the connecting portion is rotatably installed between the mounting portion and the mounting seat.

4. The stapler according to claim 3, characterized in that: The mounting portion is provided with an abutting portion extending away from the proximal end of the main body, the abutting portion is located above the force-bearing portion, and the resetting elastic member is located between the abutting portion and the force-bearing portion.

5. The stapler according to claim 4, characterized in that: The force-bearing portion is provided with an abutment column, and the first end of the reset elastic member is located between the abutment column and the rotating portion.

6. The stapler according to claim 3, characterized in that: One of the connecting portion and the mounting seat is provided with a first column, and the other is provided with a first assembly hole that matches the first column. One of the connecting portion and the mounting portion is provided with a second column, and the other is provided with a second assembly hole that matches the second column. The first assembly hole and the second assembly hole are coaxially arranged and parallel to the axial direction of the main body.

7. The stapler according to claim 6, characterized in that: A limiting portion is provided on the side wall of the first column and / or the second column extending outward, and a stop groove cooperating with the limiting portion is provided on the hole wall of the first assembly hole and / or the second assembly hole. In the first state, the limiting portion and the stop groove abut against the first side wall away from the cutting knife assembly, and in the second state, the limiting portion and the stop groove abut against the second side wall close to the cutting knife assembly.

8. The stapler according to claim 1, characterized in that: The slider is located at the proximal end of the nail gate in the initial state; In the first state, an angle is formed between the nail magazine base and the nail support assembly, and the slider is separated from the two locking mechanisms; In the second state, the nail magazine base is parallel to the nail support assembly, and the sliding block is in contact with both of the locking mechanisms.

9. The stapler according to claim 8, characterized in that: The sliding block comprises two bosses, and the two bosses push the locking mechanism to rotate.

10. The stapler according to claim 1, characterized in that: The mounting seat comprises a support plate and a bent plate bent on the support plate. One of the mounting portion and the support plate is provided with a mounting column, and the other is provided with a mounting hole.

11. The stapler according to claim 10, characterized in that: The mounting portion is provided with a mounting groove, and the support plate is extended toward the mounting portion and is provided with a positioning protrusion corresponding to the mounting groove.

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