End effector of anastomat and anastomat

Abstract

The utility model relates to the technical field of medical instruments, and discloses an end effector of an anastomat and the anastomat, the end effector comprises: an anvil comprising a first advancing groove; the nail bin seat comprises a second advancing groove and an offset clamping groove, and one inner side wall of the offset clamping groove is arranged in an offset mode relative to one inner side wall of the second advancing groove so as to form a stopping step; the nail bin is detachably connected with the nail bin seat; the wedge-shaped block is arranged in the nail bin in a sliding manner; a cutting blade; when the wedge-shaped block abuts against the guiding piece, the guiding piece is located at the guiding position, so that the cutting knife is guided by the guiding piece to advance into the second advancing groove before moving to the stopping step, and when the wedge-shaped block is separated from the guiding piece, the guiding piece can rotate to the avoiding position relative to the nail bin base. Therefore, the cutting knife abuts against the stopping step so as to limit the forward movement of the cutting knife. According to the end effector of the anastomat and the anastomat, the problem that an end effector of an existing anastomat is complex in structure can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a terminal manipulator of a stapler and the stapler. BACKGROUND

[0002] As a medical device widely used in minimally invasive surgery, the stapler is mainly used for tissue resection, transection and anastomosis in abdominal surgery, gynecology, pediatrics and thoracic surgery open surgery. For example, in the anastomosis of the linear cutting stapler, the stapler functions to cut the tissue and suture the tissue incision, wherein the stapling function of the stapler is realized by the staple cartridge assembly through the formation of the anastomotic nail line, and the staple cartridge assembly is a disposable consumable. The cutting function of the stapler is realized by the cutting knife, and the cutting knife assembly can be reused by replacing a new staple cartridge assembly in a scene of anastomosis. However, the cutting function and the anastomosis function of the stapler are realized in combination, which is safe. If the cutting function is realized without the suture function, it will cause serious medical accidents such as tissue trauma and bleeding. Therefore, the design of the stapler needs to consider the risk of realizing the cutting function (i.e. secondary firing) in the clinical scenario without the staple cartridge assembly or the used staple cartridge assembly.

[0003] In the related art, after the firing of the linear cutting stapler, the cutting knife assembly is pulled back to the initial position, and a structure is designed to prevent the second empty firing. This structure can effectively prevent the operator from firing twice in the scenario without loading the staple cartridge assembly, and avoid the risk of cutting the tissue without suture due to misoperation. However, the structure of the terminal manipulator of the existing stapler is relatively complex. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a terminal manipulator of a stapler and the stapler, which can improve the problem of the relatively complex structure of the terminal manipulator of the existing stapler.

[0005] In a first aspect, the present application provides a terminal manipulator of a stapler, comprising:

[0006] An anvil comprising a first travel groove;

[0007] A staple cartridge seat comprising a second travel groove and a biasing clamping groove arranged in sequence and connected, the width of the biasing clamping groove is greater than the width of the second travel groove, and an inner side wall of the biasing clamping groove is arranged offset compared to an inner side wall of the second travel groove to form a stop step;

[0008] A staple cartridge, which is detachably connected with the staple cartridge seat;

[0009] A wedge-shaped block, which is slidably arranged in the staple cartridge;

[0010] A cutting knife, which is slidably connected with the anvil and the staple cartridge seat; and

[0011] A guide member is rotationally connected with the cartridge seat. When the wedge block abuts against the guide member, the guide member is in a guiding position, so that the cutting knife is guided by the guide member to advance into the second advancing groove before abutting against the stop step. When the wedge block is separated from the guide member, the guide member can rotate relative to the cartridge seat to a avoiding position, so as to not guide the cutting knife, and the cutting knife abuts against the stop step to limit the advancing movement of the cutting knife.

[0012] In some embodiments, the cartridge seat comprises a first limiting portion for abutting against the guide member when the guide member is in the guiding position, to limit the rotation of the guide member relative to the cartridge seat in a first direction.

[0013] In some embodiments, the cartridge seat comprises a second limiting portion for abutting against the guide member when the guide member rotates relative to the cartridge seat to the avoiding position, to limit the rotation of the guide member relative to the cartridge seat in a second direction, which is opposite to the first direction.

[0014] In some embodiments, the guide member comprises a first end and a second end, and a rotating portion provided between the first end and the second end, the rotating portion being rotationally connected with the cartridge seat, the first end having a guiding surface and an abutting portion, the abutting portion abutting against the wedge block, and the guiding surface being used for guiding the cutting knife; the second end being used for abutting against the first limiting portion or the second limiting portion.

[0015] In some embodiments, the abutting portion has an abutting surface, when the abutting surface abuts against the wedge block, the direction of the pressure applied by the abutting surface to the wedge block is perpendicular to the moving direction of the wedge block.

[0016] In some embodiments, the cartridge is provided with an engaging portion, and the wedge block is provided with an engaging portion, when the wedge block is located at the initial position at the proximal end of the cartridge, the engaging portion and the engaging portion elastically engage.

[0017] In some embodiments, the cutting knife comprises a biasing inclined surface, and the stop step comprises a biasing portion, the biasing portion is used for abutting against the biasing inclined surface to form extrusion to the biasing inclined surface, thereby forming biasing to the cutting knife, so that the cutting knife stably abuts against the stop step.

[0018] In some embodiments, the staple cartridge seat comprises a guide slot arranged at the proximal end of the biasing slot, the guide slot being in communication with the biasing slot, and the staple cartridge seat further comprises a protrusion arranged on the sidewall of the biasing slot at the proximal end, the protrusion being used to bias the cutting knife to the side of the biasing slot having the stop step.

[0019] In some embodiments, the cutting knife comprises a connected knife head and a knife rod, the knife rod comprising a first segment and a second segment arranged in sequence in a direction away from the knife head, the first segment and the second segment being arranged in biasing manner so that the cutting knife is biased to the side of the biasing slot having the stop step.

[0020] In a second aspect, the embodiments of the present application provide an anastomat, which comprises a handle, a shaft assembly extending from the handle, and an end effector as described in the first aspect connected to the distal end of the shaft assembly.

[0021] The end effector provided by the embodiments of the present application has the beneficial effects that, since an inner sidewall of the biasing slot is arranged in biasing manner compared to an inner sidewall of the second advancing slot to form a stop step, and the guide member is rotationally connected to the staple cartridge seat, when the wedge-shaped block abuts against the guide member, the guide member is in a guiding position, so that the cutting knife is guided by the guide member to advance into the second advancing slot before the cutting knife reaches the stop step, and the guide member can be rotated to a avoiding position relative to the staple cartridge seat, so that the guide member does not have a guiding effect on the cutting knife, the cutting knife abuts against the stop step to limit the advancing movement of the cutting knife, the function of preventing secondary firing is realized, the structure is simple and reliable, the use is convenient, and the problem that the structure of the end effector of the existing anastomat is relatively complex can be improved.

[0022] The anastomat provided by the present application has the beneficial effects compared to the prior art, which can be explained by referring to the beneficial effects of the end effector provided by the present application compared to the prior art, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is a structural schematic diagram of an end effector of an anastomat in one of the embodiments of the present application;

[0025] Figure 2 is Figure 1 is a partial structural schematic diagram of the end effector shown.

[0026] Figure 3 yes Figure 1 The diagram shows the structure of the staple cartridge in the end effector.

[0027] Figure 4 yes Figure 1 The diagram shows the structure of the wedge block in the end effector.

[0028] Figure 5 yes Figure 1 The diagram shown illustrates the guide element in the guide position within the end effector.

[0029] Figure 6 yes Figure 1 The diagram shows the guide in the avoidance position in the end effector.

[0030] Figure 7 This is a schematic diagram showing the cutting blade moving from the guide groove to the offset slot when the guide component is in the guide position;

[0031] Figure 8 This is a schematic diagram showing the cutting blade moving from the offset slot to the second travel slot when the guide is in the guide position;

[0032] Figure 9 This is a schematic diagram showing the cutting blade moving from the guide groove to the offset slot when the guide component is in the avoidance position;

[0033] Figure 10 This is a schematic diagram showing how the stop step restricts the cutting blade from advancing from the offset slot to the second travel slot when the guide is in the avoidance position;

[0034] Figure 11 yes Figure 1 The diagram shows the resistance force of the guide member against the wedge block when the guide member is in the guide position in the end effector.

[0035] Figure 12 This is a schematic diagram of the cutting blade of the end effector in another embodiment of this application;

[0036] Figure 13 yes Figure 12 The diagram shows the cutting blade being guided by the guide before it reaches the stop step and moves into the second travel groove.

[0037] Figure 14 yes Figure 12 A schematic diagram showing the contact between the biasing bevel of the cutting blade and the biasing part of the stop step;

[0038] Figure 15 This is a schematic diagram of the cutting blade in the end effector in another embodiment of this application;

[0039] Figure 16 is Figure 15 The cutting knife shown in the figure is a schematic view of the biased clamping groove advancing to the second advancing groove.

[0040] The meanings marked in the figure are:

[0041] 10, staple cartridge seat;

[0042] 101, second advancing groove; 102, biased clamping groove; 103, guide groove; 11, stop step; 111, biasing part; 12, first limiting part; 13, second limiting part; 14, protruding block;

[0043] 20, staple cartridge;

[0044] 21, clamping part;

[0045] 30, wedge-shaped block;

[0046] 31, clamping part;

[0047] 40, cutting knife;

[0048] 401, biasing inclined surface; 41, knife head; 42, knife rod; 421, first section; 422, second section; 423, intermediate section;

[0049] 50, guide;

[0050] 51, first end; 511, guide surface; 512, abutting part; 5121, abutting surface; 52, second end; 53, rotating part. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0052] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0053] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0054] Reference to "one embodiment", "some embodiments", "an embodiment" or "embodiments" in the present application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments" and so on in various places in the specification are not necessarily all referring to the same embodiment, but can refer to different embodiments, although they can be referring to the same or similar embodiments.

[0055] To illustrate the technical solutions of the present application, specific embodiments and drawings are described below.

[0056] In the related art, after firing is completed, the straight-line cutting anastomat has a structure designed to prevent second empty firing after the cutting knife assembly is pulled back to the initial position. This structure can effectively prevent the operator from second firing in the scenario of not loading the staple cartridge assembly, cutting the tissue empty due to misoperation, and avoiding the risk of cutting the tissue without suturing. However, the structure of the end effector of the existing anastomat is relatively complex.

[0057] In view of this, the end effector of the anastomat and the anastomat are provided in the embodiments of the present application. Since an inner side wall of the biasing clamping groove is offset relative to an inner side wall of the second advancing groove to form a stop step, and the guide piece is rotationally connected with the staple cartridge seat, when the wedge-shaped block abuts against the guide piece, the guide piece is in a guiding position, so that the cutting knife is guided by the guide piece to advance into the second advancing groove before the cutting knife reaches the stop step, one-time firing can be completed, and the guide piece can be rotated to a avoiding position relative to the staple cartridge seat, so that the guide piece does not have a guiding effect on the cutting knife, the cutting knife abuts against the stop step to limit the advancing movement of the cutting knife, the function of preventing second firing is realized, the structure is simple and reliable, convenient to use, and the problem that the structure of the end effector of the existing anastomat is relatively complex can be improved.

[0058] Please refer to Figures 1 to 6 , Figure 2 is a structural schematic view of the end effector of the anastomat in one of the embodiments of the present application, Figure 3 is Figure 1 a structural schematic view of the staple cartridge 20 in the end effector shown in FIG. 2, Figure 4 is Figure 1 a structural schematic view of the wedge-shaped block 30 in the end effector shown in FIG. 3, Figure 5 is Figure 1 a schematic view of the guide piece 50 in the end effector shown in FIG. 4 being in a guiding position, Figure 6 is Figure 1 a schematic view of the guide piece 50 in the end effector shown in FIG. 5 being in an avoiding position.

[0059] In a first aspect, the embodiments of the present application provide an end effector of an anastomat, comprising an anvil (not shown in the figures), a cartridge seat 10, a cartridge 20, a wedge 30, a cutting knife 40 and a guide 50.

[0060] The anvil comprises a first travel groove.

[0061] The cartridge seat 10 comprises a second travel groove 101 and a biasing clamping groove 102 arranged in sequence and in communication, the biasing clamping groove 102 has a width greater than that of the second travel groove 101 so as to provide a flexible deformation space for the cutting knife 40, and an inner side wall of the biasing clamping groove 102 is arranged offset compared to an inner side wall of the second travel groove 101 to form a stop step 11.

[0062] The stop step 11 can comprise an inner side wall of the biasing clamping groove 102 towards the proximal end of the anastomat.

[0063] The cartridge 20 is detachably connected with the cartridge seat 10, such as being clamped together, the wedge 30 is slidably arranged in the cartridge 20, and the cutting knife 40 is slidably connected with the anvil and the cartridge seat 10, such as the cutting knife 40 being slidable in the first travel groove, and the cutting knife 40 being further slidable in the second travel groove 101 and the biasing clamping groove 102.

[0064] The guide 50 is rotationally connected with the cartridge seat 10, when the wedge 30 abuts against the guide 50, the guide 50 is in a guiding position (such as the position of the guide 50 shown in Figure 5 ), so that the cutting knife 40 is guided by the guide 50 to advance into the second travel groove 101 before abutting against the stop step 11, and when the wedge 30 is separated from the guide 50, the guide 50 can be rotated relative to the cartridge seat 10 to a avoiding position (such as the position of the guide 50 shown in Figure 6 ), so that the guide 50 does not have a guiding effect on the cutting knife 40, and the cutting knife 40 abuts against the stop step 11 to limit the advancing movement of the cutting knife 40.

[0065] Please refer to Figures 7 to 10 , Figure 7 is a schematic view of the cutting knife 40 advancing from the guiding groove 103 to the biasing clamping groove 102 when the guide 50 is in the guiding position, Figure 8 is a schematic view of the cutting knife 40 advancing from the biasing clamping groove 102 to the second travel groove 101 when the guide 50 is in the guiding position, Figure 9 is a schematic view of the cutting knife 40 advancing from the guiding groove 103 to the biasing clamping groove 102 when the guide 50 is in the avoiding position, Figure 10 is a schematic view of the stop step 11 limiting the cutting knife 40 to advance from the biasing clamping groove 102 to the second travel groove 101 when the guide 50 is in the avoiding position, and the direction indicated by the arrow in the figure is the moving direction of the cutting knife 40.

[0066] Wherein, advancing means moving from the proximal end of the stapler to the distal end of the stapler, and retreating means moving from the distal end of the stapler to the proximal end of the stapler.

[0067] When the first firing is performed, the cutting knife 40 is guided by the guide piece 50 to advance into the second travel groove 101 before the stop step 11, the wedge-shaped block 30 is pushed forward by the cutting knife 40, the wedge-shaped block 30 is separated from the guide piece 50, and the guide piece 50 is in contact with the cutting knife 40 and rotates to the avoiding position relative to the cartridge seat 10. After the cutting knife 40 retreats to the initial position at the proximal end of the stapler, the cutting knife 40 is not guided, so that the cutting knife 40 abuts against the stop step 11 to limit the advancing movement of the cutting knife 40. If the second firing is performed, the cutting knife 40 is blocked by the stop step 11, thereby realizing the function of preventing the second firing.

[0068] As can be seen from the above, the end effector provided by the embodiment of the present application has the following advantages. The inner side wall of the biasing slot 102 is offset relative to the inner side wall of the second travel groove 101 to form the stop step 11, and the guide piece 50 is rotationally connected with the cartridge seat 10. When the wedge-shaped block 30 abuts against the guide piece 50, the guide piece 50 is in the guiding position, so that the cutting knife 40 is guided by the guide piece 50 to advance into the second travel groove 101 before the stop step 11, and the first firing can be completed. The guide piece 50 can rotate to the avoiding position relative to the cartridge seat 10, so that the cutting knife 40 is not guided, and the cutting knife 40 abuts against the stop step 11 to limit the advancing movement of the cutting knife 40, thereby realizing the function of preventing the second firing. The structure is simple and reliable, easy to use, and can improve the problem that the structure of the end effector of the existing stapler is relatively complex.

[0069] It can be understood that the end effector provided by the embodiment of the present application can normally realize the function of the first firing after replacing the new cartridge 20, and realize the function of preventing the second firing after the first firing.

[0070] Please refer to Figures 5 to 10 In the embodiment, the cartridge seat 10 includes a first limiting part 12, which is used to abut against the guide piece 50 when the guide piece 50 is in the guiding position, so as to limit the rotation of the guide piece 50 relative to the cartridge seat 10 in the first direction. The first direction can be the direction indicated by the arrow n in Figure 5 and Figure 6 .

[0071] By adopting the above scheme, it can be avoided that the guide piece 50 rotates relative to the cartridge seat 10 to the inside of the biasing slot 102 when the guide piece 50 is in the guiding position, so that the guide piece 50 is located in the biasing slot 102 for a longer time, and the retreat of the cutting knife 40 to the initial position is affected.

[0072] Optionally, the cartridge seat 10 comprises a second limiting part 13, which is used to abut against the guide 50 when the guide 50 is rotated to the avoiding position relative to the cartridge seat 10, so as to limit the rotation of the guide 50 relative to the cartridge seat 10 in a second direction, the second direction being opposite to the first direction, and the second direction can be Figure 5 and Figure 6 the direction indicated by the arrow m.

[0073] In this way, the guide 50 can be prevented from continuing to rotate relative to the cartridge seat 10 when the guide 50 is in the avoiding position, so that the wedge block 30 in the new cartridge 20 cannot abut against the guide 50 when the new cartridge 20 is subsequently installed.

[0074] The guide 50 comprises a first end 51 and a second end 52, and a rotating part 53 arranged between the first end 51 and the second end 52, the rotating part 53 being rotationally connected to the cartridge seat 10, the first end 51 having a guide surface 511 and an abutting part 512, the abutting part 512 abutting against the wedge block 30, and the guide surface 511 being used to guide the cutting knife 40; and the second end 52 being used to abut against the first limiting part 12 or the second limiting part 13.

[0075] In this way, the structure of the guide 50 can be relatively simple, and the guide 50 can be conveniently arranged to abut against the wedge block 30, the first limiting part 12 or the second limiting part 13.

[0076] For example, the rotating part 53 can be rotationally connected to the cartridge seat 10 through a rotating shaft, and the first end 51 and the second end 52 are respectively located on two sides of the rotating shaft.

[0077] It should be noted that after the new cartridge 20 is assembled from the distal end side of the cartridge seat 10, the wedge block 30 in the cartridge 20 abuts against the first end 51 of the guide 50, so that the guide 50 is located in the guiding position and is prevented from rotating. When the jaw is closed, the firing safety is opened, so that the stapler can be fired for the first time, and in the firing process, the wedge block 30 is pushed away by the cutting knife 40 in the distal direction. After the cutting knife 40 completes the first firing and returns to the initial position, the jaw is closed again and the firing safety is further opened to prepare for the second firing. Since there is no wedge block 30 to push against, the guide 50 rotates to the avoiding position after contacting the cutting knife 40, so that the guide 50 cannot guide the cutting knife 40 any more, and the cutting knife 40 is blocked by abutting against the stop step 11, so that the second firing cannot be performed.

[0078] Please refer to Figure 2 and Figure 11 , Figure 11 is Figure 1 a schematic view of the abutting force of the guide 50 against the wedge block 30 when the guide 50 is in the guiding position in the end effector shown in

[0079] In order to avoid that the guide 50 pushes the wedge block 30 to advance when the guide 50 guides the cutting knife 40 to advance into the second advancing groove 101 from the biasing clamping groove 102 via the stop step 11 when the guide 50 is in the guide position, causing the wedge block 30 to move unexpectedly, in the embodiment, the abutting portion 512 has an abutting surface 5121, when the abutting surface 5121 abuts against the wedge block 30, the pressure applied by the abutting surface 5121 to the wedge block 30 is perpendicular to the moving direction of the wedge block 30.

[0080] By adopting the above scheme, the pressure F applied by the abutting surface 5121 to the wedge block 30 has no component along the advancing direction of the wedge block 30, so the wedge block 30 will not be pushed to advance.

[0081] It can be understood that the wedge block 30 will advance only after the firing safety of the stapler is opened, and the cutting knife 40 contacts the wedge block 30. The guide 50 can be a metal piece, and has high reliability.

[0082] Please refer to Figures 2 to 5 In the embodiment, the staple cartridge 20 is provided with a clamping portion 21, and the wedge block 30 is provided with a clamping portion 31, when the wedge block 30 is located at the initial position near the end of the staple cartridge 20, the clamping portion 21 and the clamping portion 31 are elastically clamped.

[0083] In this way, when the guide 50 is in the guide position, it can be avoided that the guide 50 pushes the wedge block 30 to advance when the guide 50 guides the cutting knife 40 to advance into the second advancing groove 101 from the biasing clamping groove 102 via the stop step 11, causing the wedge block 30 to misfire, or avoiding that the wedge block 30 is displaced relative to the staple cartridge 20 during the transportation and storage of the staple cartridge 20, etc., causing the staple cartridge 20 to be unusable, etc.

[0084] It can be understood that the clamping portion 21 and the clamping portion 31 are disengaged during the process that the cutting knife 40 pushes the wedge block 30 to advance.

[0085] It should be noted that the clamping portion 21 can be a protrusion, and the clamping portion 31 can be a recess. Alternatively, the clamping portion 21 can be a recess, and the clamping portion 31 can be a protrusion.

[0086] It should be further noted that the clamping portion 21 and the clamping portion 31 can be disengaged and clamped together, and the guide 50 for preventing secondary knife advancement can be abutted during the assembly of the staple cartridge 20, achieving low cost, high reliability function, and reducing the risk of instrument operation.

[0087] Please refer to Figure 12 , Figure 13 and Figure 14 , Figure 12This is a schematic diagram of the cutting blade 40 in the end effector in another embodiment of this application. Figure 13 yes Figure 12 The diagram shows the cutting blade 40 being guided by the guide member 50 into the second travel groove 101 before it moves to the stop step 11. Figure 14 yes Figure 12 The diagram shows the biasing slope 401 of the cutting blade 40 abutting against the biasing part 111 of the stop step 11.

[0088] In another embodiment, the cutting blade 40 includes a biasing inclined surface 401, and the stop step 11 includes a biasing portion 111. The biasing portion 111 is used to abut against the biasing inclined surface 401 to form a compression on the biasing inclined surface 401, thereby forming a bias on the cutting blade 40, so that the cutting blade 40 and the stop step 11 are stably abutted.

[0089] By adopting the above features, the biasing part 111 can abut against the biasing inclined surface 401 to form a bias on the cutting blade 40, so that the cutting blade 40 can abut against the stop step 11 stably.

[0090] Optionally, the cutting blade 40 has an "I" beam structure, with two "I" beams located in the first travel groove of the anvil and the second travel groove 101 of the nail cartridge seat 10, respectively.

[0091] Please refer to Figure 2 , Figure 7 and Figure 8 In this embodiment, the staple cartridge 10 includes a guide groove 103, which is disposed at the proximal end of the biased slot 102 and is connected to the biased slot 102. The staple cartridge 10 also includes a protrusion 14 disposed on the proximal sidewall of the biased slot 102. The protrusion 14 is used to bias the cutting blade 40 toward the side of the biased slot 102 with the stop step 11.

[0092] By adopting the above scheme, the cutting blade 40 can be biased by the protrusion 14, so that the cutting blade 40 can move from the guide groove 103 to the biasing slot 102, and then be guided by the guide member 50 to the second travel groove 101 before the cutting blade 40 moves to the stop step 11.

[0093] It is understood that the extension direction of the guide groove 103 can be collinear with the extension direction of the second travel groove 101, and the blade shank 42 of the cutting blade 40 can have a certain degree of elasticity. The guide groove 103 and the protrusion 14 can be provided on the rotating seat (not shown in the figure) of the staple cartridge seat 10.

[0094] Please refer to Figure 15 and Figure 16 , Figure 15 This is a schematic diagram of the cutting blade 40 in the end effector of another embodiment of this application.Figure 16 is Figure 15 The schematic view of the cutting knife 40 advancing to the second advancing slot 101 by the biasing of the clamping slot 102 is shown.

[0095] As another way to achieve the above effects, in yet another embodiment, the cutting knife 40 comprises a connected knife head 41 and a knife rod 42, the knife rod 42 comprises a first section 421 and a second section 422 arranged in sequence in a direction away from the knife head 41, the first section 421 and the second section 422 are arranged in biasing, so that the cutting knife 40 is biased to the side of the biasing clamping slot 102 with the stop step 11.

[0096] By adopting the above scheme, the cutting knife 40 can be advanced into the biasing clamping slot 102 by the structure of the cutting knife 40 itself, and then guided into the second advancing slot 101 by the guide 50 before the cutting knife 40 moves to the stop step 11.

[0097] It can be understood that the first section 421 can be elastically deformed relative to the second section 422.

[0098] Optionally, the knife rod 42 comprises an intermediate section 423 between the first section 421 and the second section 422, and the first section 421 and the second section 422 are connected to both ends of the intermediate section 423, respectively.

[0099] In this way, the first section 421 and the second section 422 are arranged in biasing.

[0100] In a second aspect, the embodiments of the present application provide an anastomat, which comprises a handle, a shaft assembly extending from the handle, and an end effector as in the first aspect connected to a distal end of the shaft assembly.

[0101] The anastomat provided by the embodiments of the present application, since an inner side wall of the biasing clamping slot 102 is arranged in biasing compared to an inner side wall of the second advancing slot 101 to form the stop step 11, and the guide 50 is rotationally connected to the nail cartridge seat 10, when the wedge-shaped block 30 abuts against the guide 50, the guide 50 is in the guide position, so that the cutting knife 40 is guided by the guide 50 to advance into the second advancing slot 101 before the cutting knife 40 moves to the stop step 11, a single firing can be completed, and the guide 50 can be rotated to the avoiding position relative to the nail cartridge seat 10, so that the guide 50 does not have a guiding effect on the cutting knife 40, so that the cutting knife 40 abuts against the stop step 11 to limit the advancing movement of the cutting knife 40, the function of preventing secondary firing is realized, the structure is simple and reliable, convenient to use, and the problem that the structure of the end effector of the existing anastomat is relatively complex can be improved.

[0102] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An end effector of a stapler, characterized by, The application relates to a staple anvil, a staple cartridge seat, a staple cartridge, a wedge-shaped block, a cutting knife and a guide. The staple anvil comprises a first advancing groove. The staple cartridge seat (10) comprises a second advancing groove (101) and a biasing clamping groove (102) arranged in sequence and connected in communication, the biasing clamping groove (102) has a width greater than that of the second advancing groove (101), and an inner side wall of the biasing clamping groove (102) is arranged in a biasing mode compared with an inner side wall of the second advancing groove (101) to form a stop step (11). The staple cartridge (20) is detachably connected with the staple cartridge seat (10). The wedge-shaped block (30) is slidably arranged in the staple cartridge (20). The cutting knife (40) is slidably connected with the staple anvil and the staple cartridge seat (10). The guide (50) is rotationally connected with the staple cartridge seat (10), when the wedge-shaped block (30) abuts against the guide (50), the guide (50) is in a guiding position, so that the cutting knife (40) is guided by the guide (50) to advance into the second advancing groove (101) before abutting against the stop step (11), when the wedge-shaped block (30) is separated from the guide (50), the guide (50) can be rotated to a avoiding position relative to the staple cartridge seat (10), so that the guide (50) does not have a guiding effect on the cutting knife (40), and the cutting knife (40) abuts against the stop step (11) to limit the advancing movement of the cutting knife (40).

2. The end effector of claim 1, wherein, The staple cartridge seat (10) comprises a first limiting part (12) for abutting against the guide (50) when the guide (50) is in the guiding position to limit the rotation of the guide (50) relative to the staple cartridge seat (10) in a first direction.

3. The end effector of claim 2, wherein, The staple cartridge seat (10) comprises a second limiting part (13) for abutting against the guide (50) when the guide (50) is rotated to the avoiding position relative to the staple cartridge seat (10) to limit the rotation of the guide (50) relative to the staple cartridge seat (10) in a second direction, and the second direction is opposite to the first direction.

4. The end effector of claim 3, wherein, The guide (50) comprises a first end (51) and a second end (52) and a rotating part (53) arranged between the first end (51) and the second end (52), the rotating part (53) is rotationally connected with the staple cartridge seat (10), the first end (51) has a guiding surface (511) and an abutting part (512), the abutting part (512) abuts against the wedge-shaped block (30), and the guiding surface (511) is used for guiding the cutting knife (40); and the second end (52) is used for abutting against the first limiting part (12) or the second limiting part (13).

5. The end effector of claim 4, wherein, The abutting part (512) has an abutting surface (5121), when the abutting surface (5121) abuts against the wedge-shaped block (30), the pressure direction of the abutting surface (5121) applied to the wedge-shaped block (30) is perpendicular to the moving direction of the wedge-shaped block (30).

6. The end effector of claim 1, wherein, The staple cartridge (20) is provided with a clamping portion (21), the wedge block (30) is provided with a clamping portion (31), when the wedge block (30) is located in the initial position of the proximal end of the staple cartridge (20), the clamping portion (21) and the clamping portion (31) are elastically clamped.

7. The end effector of claim 1, wherein, The cutting knife (40) includes a biasing slope (401), the stop step (11) includes a biasing portion (111), the biasing portion (111) is used for abutting against the biasing slope (401), extruding the biasing slope (401), thereby biasing the cutting knife (40), and stably abutting the cutting knife (40) and the stop step (11).

8. The end effector of any one of claims 1 to 7, wherein, The staple cartridge seat (10) includes a guide groove (103), the guide groove (103) is arranged at the proximal end of the biasing clamping groove (102), the guide groove (103) is communicated with the biasing clamping groove (102), the staple cartridge seat (10) further includes a protrusion (14) arranged on the side wall of the proximal end of the biasing clamping groove (102), the protrusion (14) is used for biasing the cutting knife (40) to the side of the biasing clamping groove (102) with the stop step (11).

9. The end effector of any one of claims 1 to 7, wherein, The cutting knife (40) includes a connected knife head (41) and a knife rod (42), the knife rod (42) includes a first segment (421) and a second segment (422) arranged in sequence in the direction away from the knife head (41), the first segment (421) and the second segment (422) are arranged in biasing mode, so that the cutting knife (40) is biased to the side of the biasing clamping groove (102) with the stop step (11).

10. An anastomat characterized by comprising: The anastomat comprises a handle, a shaft assembly extending from the handle, and an end effector connected to the distal end of the shaft assembly, the end effector being as claimed in any one of claims 1 to 9.

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