Nail bin, end effector of anastomat and anastomat

Abstract

The utility model relates to the technical field of medical instruments, and discloses a nail bin, an end effector of an anastomat and the anastomat, the nail bin comprises a main body part and an elastic cantilever, one end of the elastic cantilever is connected with the main body part, the other end of the elastic cantilever is a free end, and a wedge block is arranged in the nail bin; the elastic cantilever abuts against the wedge-shaped block, so that the free end is kept at the guiding position, the cutting knife is guided by the free end to advance into the second advancing groove before moving to the stopping step, the wedge-shaped block is separated from the elastic cantilever, the free end can be offset to the avoiding position after abutting against the cutting knife, and therefore the cutting knife does not have the guiding effect. And the cutting knife abuts against the stopping step so as to limit the forward movement of the cutting knife. According to the nail bin, the end effector of the anastomat and the anastomat, the problems that a mechanism for preventing secondary percussion and empty percussion of an existing anastomat is complex in structure and not easy to manufacture can be solved.

Description

TECHNICAL FIELD

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

[0002] The stapler is a medical device used to replace manual tissue suturing, and its emergence has transformed traditional open surgery into laparoscopic surgery. Currently, laparoscopic staplers are widely used in various minimally invasive surgeries, such as abdominal surgery, gynecology, pediatrics and thoracic surgery open surgery, etc.

[0003] In related surgeries, after the stapler completes the firing of anastomosis, the cutting knife is retracted to the initial position. In order to prevent the doctor from performing a second empty staple cartridge or non-staple cartridge firing, an effective mechanism is needed to avoid the risk of misoperation by the doctor, but the existing mechanism for preventing secondary firing and empty firing of the stapler is relatively complex and difficult to manufacture. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a staple cartridge, a terminal actuator of a stapler and the stapler, which can improve the problem that the structure of the existing mechanism for preventing secondary firing and empty firing of the stapler is relatively complex and difficult to manufacture.

[0005] In a first aspect, the present application provides a staple cartridge for a terminal actuator of a stapler, wherein the terminal actuator comprises an anvil, a staple cartridge seat and a cutting knife, the anvil comprises a first travel groove, the staple cartridge seat comprises a second travel groove and a biasing clamping groove which are sequentially arranged 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.

[0006] The staple cartridge is used to be detachably arranged on the staple cartridge seat, the staple cartridge comprises a main body part and a resilient cantilever arranged at the proximal end of the main body part, one end of the resilient cantilever is connected with the main body part, the other end of the resilient cantilever is a free end, and a wedge-shaped block is slidably arranged in the interior of the staple cartridge; when the wedge-shaped block is located at an initial position at the proximal end of the main body part, the resilient cantilever abuts against the wedge-shaped block, so that the free end is kept at a guide position, thereby making the cutting knife move to the stop step and be guided by the free end to advance into the second travel groove; when the wedge-shaped block is pushed away from the initial position by the cutting knife, the wedge-shaped block is separated from the resilient cantilever, and the free end can be biased to a avoiding position after abutting against the cutting knife, thereby not having a guiding effect on the cutting knife, so that the cutting knife abuts against the stop step to limit the advancing movement of the cutting knife.

[0007] In some embodiments, the staple cartridge comprises a fixed arm connected to the main body, the fixed arm is parallel and spaced apart from the elastic cantilever, the fixed arm is located on the side of the elastic cantilever away from the second travel groove, when the wedge is in the initial position, part of the wedge is located between the fixed arm and the elastic cantilever to support the free end, so that the free end is kept in the guide position, so that the cutting knife can be guided when the cutting knife abuts against the free end; when the wedge is pushed away from the initial position by the cutting knife, the free end is biased to the avoiding position in the direction close to the fixed arm when abutting against the cutting knife.

[0008] In some embodiments, the fixed arm is provided in plurality, the plurality of fixed arms are parallel and spaced apart, and part of the wedge is located between two adjacent fixed arms.

[0009] In some embodiments, the free end is provided with a guide slope, when the guide slope abuts against the cutting knife, the pressure applied to the cutting knife biases the cutting knife in the direction close to the second travel groove.

[0010] In some embodiments, when the elastic cantilever abuts against the wedge, the pressure applied by the elastic cantilever to the wedge is perpendicular to the moving direction of the wedge.

[0011] In some embodiments, the main body and the elastic cantilever are integrally formed.

[0012] In a second aspect, the embodiments of the present application provide an end effector of an anastomat, the end effector comprises an anvil, a staple cartridge seat and a cutting knife, the anvil comprises a first travel groove, the staple cartridge seat comprises a second travel groove and a biasing clamping groove which are sequentially arranged and connected, the biasing clamping groove has a width greater than that of the second travel groove, 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; the end effector further comprises the staple cartridge as described in the first aspect.

[0013] In some embodiments, the cutting knife comprises a biasing slope, the stop step comprises a biasing portion, the biasing portion is used to abut against the biasing slope to form extrusion on the biasing slope, thereby forming biasing on the cutting knife, so that the cutting knife stably abuts against the stop step.

[0014] In some embodiments, the 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 cartridge seat further comprises a protrusion arranged on the sidewall of the biasing slot at the proximal end, the protrusion being configured to bias the cutting knife to the side of the biasing slot having the stop step.

[0015] In a third 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 second aspect connected to the distal end of the shaft assembly.

[0016] The cartridge provided by the embodiments of the present application has the beneficial effects that: since the cartridge comprises a main body portion and an elastic cantilever arranged at the proximal end of the main body portion, one end of the elastic cantilever is connected to the main body portion, the other end of the elastic cantilever is a free end, and a wedge-shaped block is slidably arranged in the cartridge, when the wedge-shaped block is located at an initial position at the proximal end of the main body portion, the elastic cantilever abuts against the wedge-shaped block, so that the free end is kept at a guide position, thereby guiding the cutting knife to advance into the second travel groove before the cutting knife abuts against the stop step, and a first firing can be completed, and when the wedge-shaped block is pushed away from the initial position by the cutting knife, the wedge-shaped block is separated from the elastic cantilever, the free end loses the abutting effect of the wedge-shaped block, and the free end can be biased to a avoiding position after abutting against the cutting knife, thereby not guiding the cutting knife, so that the cutting knife abuts against the stop step to limit the forward movement of the cutting knife, and the functions of preventing secondary firing and preventing empty firing are realized. The cartridge provided by the embodiments of the present application takes the structure of the cartridge itself as the mechanism for preventing secondary firing and preventing empty firing, and the structure is relatively simple and convenient to manufacture.

[0017] The beneficial effects of the end effector and the anastomat provided by the present application can be explained with reference to the beneficial effects of the cartridge provided by the present application compared with the prior art, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or the prior art description will be briefly introduced as follows. 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.

[0019] Figure 1 is a structural schematic view of the cartridge seat and the anvil of the anastomat in one of the embodiments of the present application;

[0020] Figure 2 is Figure 1 is a structural schematic view of the cartridge seat and the cutting knife in the anastomat shown in FIG. 6;

[0021] Figure 3 is Figure 2 is a schematic view of the partial structure of the staple cartridge seat and the cutting knife;

[0022] Figure 4 is Figure 1 is a schematic view of the structure of the staple cartridge in the anastomat;

[0023] Figure 5 is Figure 4 is a schematic view of the partial structure of the staple cartridge in the anastomat;

[0024] Figure 6 is Figure 4 is a schematic view of the free end of the elastic cantilever in the retracted position;

[0025] Figure 7 is Figure 3 is a schematic view of the cutting knife retracted to the initial position;

[0026] Figure 8 is Figure 7 is a schematic view of the free end of the elastic cantilever biased to the retracted position when the cutting knife is advanced for the second time;

[0027] Figure 9 is a schematic view of the structure of the cutting knife of the end effector in another embodiment of the application;

[0028] Figure 10 is Figure 9 is a schematic view of the cutting knife moved to the stop step before being guided by the free end to advance into the second travel groove;

[0029] Figure 11 is Figure 10 is a schematic view of the biasing slope of the cutting knife abutting the biasing portion of the stop step.

[0030] The meanings of the labels in the figures are as follows:

[0031] 10, staple cartridge seat;

[0032] 101, second travel groove; 102, biasing slot; 103, guide slot; 11, stop step; 111, biasing portion; 12, protrusion;

[0033] 20, staple cartridge;

[0034] 21, main body portion; 22, elastic cantilever; 221, free end; 222, guide slope; 23, fixed arm;

[0035] 30, wedge block;

[0036] 40, cutting knife;

[0037] 401 biasing slope; 41 tool head; 42 tool bar;

[0038] 50 anvil. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0040] It should be noted that when an element is referred to as being "fixed" or "set" 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.

[0041] 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.

[0042] In the description of the present application, the reference "one embodiment", "some embodiments" or "embodiments" means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. In addition, in one or more embodiments, specific features, structures or characteristics can be combined in any suitable manner.

[0043] In order to illustrate the technical solutions of the present application, the following will be described in combination with specific drawings and embodiments.

[0044] In related surgery, after the anastomat completes the firing anastomosis, the cutting knife is retracted to the initial position, in order to prevent the doctor from performing a second empty nail bin or an effective avoidance of the risk of misoperation of the doctor without a nail bin firing, a mechanism for preventing secondary firing and empty firing is needed, but the structure of the existing anastomat's mechanism for preventing secondary firing and empty firing is relatively complex and not easy to make.

[0045] In view of this, this application provides a staple cartridge, an end effector for a stapler, and a stapler. The staple cartridge includes a main body and an elastic cantilever disposed near the proximal end of the main body. One end of the elastic cantilever is connected to the main body, and the other end is a free end. A wedge block is slidably disposed inside the staple cartridge. Therefore, when the wedge block is in its initial position near the proximal end of the main body, the elastic cantilever abuts against the wedge block, keeping the free end in a guiding position. This allows the cutting blade to be guided forward into the second travel groove before reaching the stop step, completing one firing. When the wedge block is pushed away from its initial position by the cutting blade, the wedge block separates from the elastic cantilever, and the free end can be biased to a clearance position after contacting the cutting blade, thus no longer guiding the cutting blade. This allows the cutting blade to contact the stop step to restrict its forward movement, achieving the functions of preventing secondary firing and preventing empty firing. The staple cartridge provided in this application uses its own structure as a mechanism for preventing secondary firing and empty firing, resulting in a relatively simple structure that is easy to manufacture.

[0046] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the staple cartridge 10 and anvil 50 of the stapler in one embodiment of this application. Figure 2 yes Figure 1 The diagram shows the structure of the stapler cartridge 10 and the cutting blade 40 in the stapler. Figure 3 yes Figure 2 A partial structural schematic diagram of the staple cartridge 10 and the cutting blade 40 is shown.

[0047] In a first aspect, embodiments of this application provide a staple cartridge 20 for an end effector of a stapler. The end effector includes an anvil 50, a staple cartridge seat 10, and a cutting blade 40. The anvil 50 includes a first travel groove. The staple cartridge seat 10 includes a second travel groove 101 and an offset slot 102 arranged sequentially and connected to each other. The width of the offset slot 102 is greater than the width of the second travel groove 101. An inner sidewall of the offset slot 102 is offset relative to an inner sidewall of the second travel groove 101 to form a stop step 11.

[0048] The stop step 11 may include an offset slot 102 facing the inner wall of the proximal end of the stapler.

[0049] Please refer to this as well. Figure 4 , Figure 5 and Figure 6 , Figure 4 yes Figure 1 The diagram shown is a structural schematic of the staple cartridge 20 in the stapler. Figure 5 yes Figure 4 A partial structural diagram of the staple cartridge 20 in the stapler shown. Figure 6 yes Figure 4A schematic view of the free end 221 of the elastic cantilever 22 of the staple cartridge 20 shown in a retracted position.

[0050] The staple cartridge 20 is used to be detachably arranged on the staple cartridge seat 10, the staple cartridge 20 comprises a main body part 21 and an elastic cantilever 22 arranged at the proximal end of the main body part 21, one end of the elastic cantilever 22 is connected with the main body part 21, the other end of the elastic cantilever 22 is a free end 221, and the inside of the staple cartridge 20 is slidably arranged with a wedge block 30; when the wedge block 30 is located at the initial position at the proximal end of the main body part 21, the elastic cantilever 22 abuts against the wedge block 30, so that the free end 221 is kept at a guiding position, thereby making the cutting knife 40 move to be guided by the free end 221 to advance into the second advancing groove 101 before the stop step 11, when the wedge block 30 is pushed away from the initial position by the cutting knife 40, the wedge block 30 is separated from the elastic cantilever 22, and the free end 221 can be biased to a retracted position after abutting against the cutting knife 40, thereby not having 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.

[0051] The cantilever structure of the elastic cantilever 22 itself makes the elastic cantilever 22 itself have elasticity, thereby making the free end 221 be able to be biased to the retracted position after abutting against the cutting knife 40. The material of the elastic cantilever 22 can be a material having elasticity, such as plastic or the like.

[0052] Please refer to Figure 7 and Figure 8 , Figure 7 is Figure 3 a schematic view of the cutting knife 40 shown in the initial position, Figure 8 is Figure 7 a schematic view of the free end 221 of the elastic cantilever 22 being biased to the retracted position when the cutting knife 40 is secondly advanced.

[0053] The staple cartridge 20 provided by the embodiment of the present application, when the staple cartridge seat 10 is installed with the staple cartridge 20, but the staple cartridge 20 has been fired to become an empty staple cartridge 20, since the wedge block 30 has been pushed to the distal end of the staple cartridge 20 by the cutting knife 40, the abutment of the wedge block 30 is lost, the free end 221 can be elastically deformed and biased to the retracted position (such as being elastically deformed and biased in the direction indicated by the arrow in the middle of FIG. 8) after abutting against the cutting knife 40, the free end 221 does not have a guiding effect on the cutting knife 40, thereby making the cutting knife 40 advance to abut against the stop step 11, so that the stop step 11 prevents the cutting knife 40 from continuing to be fired forward, thereby achieving the purpose of preventing secondary firing; when the staple cartridge seat 10 is not installed with the staple cartridge 20, since the free end 221 in the staple cartridge 20 does not guide the cutting knife 40, thereby making the cutting knife 40 advance to abut against the stop step 11, so that the stop step 11 prevents the cutting knife 40 from continuing to be fired forward, thereby also achieving the purpose of preventing empty firing. Figure 8 ​

[0054] When the staple cartridge 20 is installed on the cartridge seat 10 and the staple cartridge 20 is not fired, that is, when the wedge block 30 is in the initial position at the proximal end of the main body portion 21, the elastic cantilever 22 abuts against the wedge block 30, so that the free end 221 is kept in the guiding position, thereby guiding the cutting knife 40 to advance into the second travel groove 101 before the cutting knife 40 is stopped by the stop step 11. When the wedge block 30 is pushed away from the initial position by the cutting knife 40, the staple jaw is compressed, the firing is completed, and the tissue cutting and anastomosis are completed. Since the elastic cantilever 22 abuts against the wedge block 30, the free end 221 cannot be biased away from the cutting knife 40.

[0055] When the firing is completed, the cutting knife 40 is retracted to the initial position. At this time, the staple cartridge 20 has been fired, and the staple cartridge 20 is an empty staple cartridge 20. When the anastomat is still in the abdominal cavity of the patient, if the operator accidentally performs a misoperation again, since the wedge block 30 is pushed away from the initial position by the cutting knife 40, the wedge block 30 is separated from the elastic cantilever 22, so that the free end 221 loses the resistance of the wedge block 30, and is biased after abutting against the cutting knife 40, and moves to the avoiding position, thereby losing the guiding effect on the cutting knife 40. The cutting knife 40 is abutted against the stop step 11 to limit the advancing movement of the cutting knife 40, thereby stopping the firing, and realizing the function of preventing secondary firing.

[0056] Wherein, the advancing is the movement from the proximal end to the distal end of the end effector, and the retracting is the movement from the distal end to the proximal end of the end effector.

[0057] As can be seen from the above, the staple cartridge 20 provided by the embodiment of the present application, since the staple cartridge 20 comprises the main body portion 21 and the elastic cantilever 22 arranged at the proximal end of the main body portion 21, one end of the elastic cantilever 22 is connected with the main body portion 21, the other end of the elastic cantilever 22 is the free end 221, and the wedge block 30 is slidably arranged in the staple cartridge 20, so that when the wedge block 30 is in the initial position at the proximal end of the main body portion 21, the elastic cantilever 22 abuts against the wedge block 30, so that the free end 221 is kept in the guiding position, thereby guiding the cutting knife 40 to advance into the second travel groove 101 before the cutting knife 40 is stopped by the stop step 11, and the one-time firing can be completed. When the wedge block 30 is pushed away from the initial position by the cutting knife 40, the wedge block 30 is separated from the elastic cantilever 22, so that the free end 221 loses the resistance of the wedge block 30, and is biased to the avoiding position after abutting against the cutting knife 40, thereby losing the guiding effect on the cutting knife 40. The cutting knife 40 is abutted against the stop step 11 to limit the advancing movement of the cutting knife 40, thereby realizing the functions of preventing secondary firing and preventing empty firing. The staple cartridge 20 provided by the embodiment of the present application takes the structure of the staple cartridge 20 itself as the mechanism for preventing secondary firing and preventing empty firing, and the structure is relatively simple and convenient to manufacture.

[0058] It can be understood that the one-shot firing function can be realized after the new nail cartridge 20 is replaced, and the secondary firing prevention function can be realized after the one-shot firing.

[0059] Please refer to Figures 1 to 8 In the embodiment, the nail cartridge 20 comprises a fixed arm 23 connected with the main body 21, the fixed arm 23 is parallel and spaced apart from the elastic cantilever 22, and the fixed arm 23 is located on the side of the elastic cantilever 22 away from the second running groove 101. When the wedge block 30 is located at the initial position, part of the wedge block 30 is located between the fixed arm 23 and the elastic cantilever 22 to support the free end 221, so that the free end 221 is kept at the guide position, thereby realizing the guidance of the cutting knife 40 when the cutting knife 40 abuts against the free end 221. When the wedge block 30 is pushed away from the initial position by the cutting knife 40, the free end 221 is biased to the avoiding position in the direction close to the fixed arm 23 when abutting against the cutting knife 40.

[0060] By adopting the above scheme, the fixed arm 23 can be used to support and limit the elastic cantilever 22 when the elastic cantilever 22 abuts against the wedge block 30, so as to avoid the deformation of the elastic cantilever 22 caused by the movement of the wedge block 30.

[0061] It should be noted that the main body 21 and the fixed arm 23 can be integrally injection molded or integrally machined.

[0062] Alternatively, the fixed arm 23 is provided in plurality, and the plurality of fixed arms 23 are parallel and spaced apart, and part of the wedge block 30 is located between the two adjacent fixed arms 23.

[0063] In this way, the fixed arm 23 can better adapt to the shape of the wedge block 30 to better support and limit the wedge block 30.

[0064] Alternatively, the free end 221 is provided with a guide inclined surface 222, and when the guide inclined surface 222 abuts against the cutting knife 40, the pressure applied to the cutting knife 40 by the guide inclined surface 222 biases the cutting knife 40 in the direction close to the second running groove 101.

[0065] In this way, the guide inclined surface 222 can be used to bias the cutting knife 40 in the direction close to the second running groove 101 when the guide inclined surface 222 abuts against the cutting knife 40.

[0066] Please continue to refer to Figures 4 to 8 In the embodiment, when the elastic cantilever 22 abuts against the wedge block 30, the direction of the pressure applied to the wedge block 30 by the elastic cantilever 22 is perpendicular to the movement direction of the wedge block 30.

[0067] By adopting the above scheme, the elastic suspension arm 22 can not push the wedge block 30 to advance, and the stability of the wedge block 30 in the initial position is ensured.

[0068] For example, the direction of the pressure applied by the elastic suspension arm 22 to the wedge block 30 can be Figure 8 the direction indicated by the arrow in the middle.

[0069] Alternatively, the wedge block 30 is detachably clamped with the main body 21 in the initial position. In this way, the elastic suspension arm 22 can not push the wedge block 30 to advance, and the stability of the wedge block 30 in the initial position is ensured.

[0070] It can be understood that the wedge block 30 is detached from the clamping with the main body 21 in the process of pushing the wedge block 30 by the cutting knife 40.

[0071] Alternatively, the main body 21 and the elastic suspension arm 22 are integrally formed, such as integrally injection molded or integrally machined.

[0072] In this way, the main body 21 and the elastic suspension arm 22 can be more conveniently manufactured.

[0073] Please refer to Figures 1 to 8 , the second aspect, the embodiment of the present application provides a kind of end effector of anastomat, end effector includes anvil 50, nail bin seat 10 and cutting knife 40, anvil 50 includes first travel groove, nail bin seat 10 includes second travel groove 101 and biasing slot 102 being sequentially arranged and being connected, the width of biasing slot 102 is greater than the width of second travel groove 101, one inner side wall of biasing slot 102 is compared with the inner side wall of second travel groove 101 and is offset to set, to form stop step 11;End effector further includes the nail bin 20 as the first aspect.

[0074] The end effector provided by the embodiment of the application, since the nail cartridge 20 comprises the main body part 21 and the elastic cantilever 22 arranged at the proximal end of the main body part 21, one end of the elastic cantilever 22 is connected with the main body part 21, the other end of the elastic cantilever 22 is the free end 221, and the wedge-shaped block 30 is slidably arranged in the interior of the nail cartridge 20, therefore, when the wedge-shaped block 30 is located at the initial position at the proximal end of the main body part 21, the elastic cantilever 22 abuts against the wedge-shaped block 30, so that the free end 221 is kept at the guiding position, thereby making the cutting knife 40 guided by the free end 221 to advance into the second advancing groove 101 before the cutting knife 40 abuts against the stop step 11, so that one-time firing can be completed, and when the wedge-shaped block 30 is pushed away from the initial position by the cutting knife 40, the wedge-shaped block 30 is separated from the elastic cantilever 22, and the free end 221 can be biased to the avoiding position after abutting against the cutting knife 40, so that the free end 221 does not have a guiding effect on the cutting knife 40, thereby making the cutting knife 40 abut against the stop step 11 to limit the advancing movement of the cutting knife 40, and the functions of preventing secondary firing and preventing empty firing are realized. The end effector provided by the embodiment of the application takes the structure of the nail cartridge 20 itself as the mechanism for preventing secondary firing and preventing empty firing, and the structure is relatively simple and convenient to manufacture.

[0075] Please refer to Figure 9 、 Figure 10 and Figure 11 , Figure 9 is a structure diagram of the cutting knife 40 of the end effector in another embodiment of the application, Figure 10 is Figure 9 a diagram showing that the cutting knife 40 is guided by the free end 221 to advance into the second advancing groove 101 before the cutting knife 40 abuts against the stop step 11, Figure 11 is Figure 10 a diagram showing that the biasing inclined surface 401 of the cutting knife 40 abuts against the biasing part 111 of the stop step 11.

[0076] In another embodiment, the cutting knife 40 comprises the biasing inclined surface 401, and the stop step 11 comprises the biasing part 111, the biasing part 111 is used for abutting against the biasing inclined surface 401 to form extrusion on the biasing inclined surface 401, thereby forming biasing on the cutting knife 40, so that the cutting knife 40 stably abuts against the stop step 11.

[0077] By adopting the above features, the biasing part 111 can abut against the biasing inclined surface 401 to form biasing on the cutting knife 40, so that the cutting knife 40 stably abuts against the stop step 11.

[0078] Optionally, the cutting blade 40 has an "I"-beam structure, which includes a blade section and lugs at both ends of the blade section. The lugs at both ends correspond to the first travel groove of the anvil 50 and the second travel groove 101 of the nail cartridge seat 10, respectively, to form a connection with the nail cartridge seat 10 and the anvil 50. The blade section includes a biasing ramp 401. When the biasing ramp 401 abuts against the biasing part 111, the force applied by the biasing part 111 to the biasing ramp 401 is perpendicular to the biasing ramp 401. This force causes the cutting blade 40 to have a directional force. Figure 8 The movement trend in the direction indicated by the middle arrow ensures that the cutting blade 40 and the stop step 11 are stably in contact.

[0079] Please refer to Figure 2 , Figure 3 , 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 12 disposed on the proximal sidewall of the biased slot 102. The protrusion 12 is used to bias the cutting blade 40 toward the side of the biased slot 102 with the stop step 11.

[0080] By adopting the above scheme, the cutting blade 40 can be biased by the protrusion 12, so that the cutting blade 40 can move from the guide groove 103 to the biasing slot 102, and then be guided by the free end 221 to the second travel groove 101 before the cutting blade 40 moves to the stop step 11.

[0081] 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. The cutting blade 40 includes a blade head 41 and a blade shank 42, and the blade shank 42 can have a certain degree of elasticity. The guide groove 103 and the protrusion 12 can be provided on the rotating seat (not shown in the figure) of the staple cartridge seat 10.

[0082] Thirdly, embodiments of this application provide a stapler, which includes a handle, a shaft assembly extending from the handle, and an end effector as described in the second aspect connected to the distal end of the shaft assembly.

[0083] The anastomat provided by the embodiments of the present application has the following advantages: the staple cartridge 20 comprises a main body 21 and an elastic cantilever 22 arranged at the proximal end of the main body 21, one end of the elastic cantilever 22 is connected with the main body 21, the other end of the elastic cantilever 22 is a free end 221, and the wedge block 30 is slidably arranged in the staple cartridge 20, so that when the wedge block 30 is located at the initial position at the proximal end of the main body 21, the elastic cantilever 22 abuts against the wedge block 30, the free end 221 is kept at the guide position, the cutting knife 40 is guided to advance into the second advancing groove 101 by the free end 221 before the cutting knife 40 abuts against the stop step 11, one-time firing can be completed, when the wedge block 30 is pushed away from the initial position by the cutting knife 40, the wedge block 30 is separated from the elastic cantilever 22, the free end 221 is biased to the avoiding position after abutting against the cutting knife 40, the free end 221 does not have the guiding effect on the cutting knife 40, the cutting knife 40 abuts against the stop step 11 to limit the advancing movement of the cutting knife 40, and the functions of preventing secondary firing and preventing empty firing are realized. The anastomat provided by the embodiments of the present application takes the structure of the staple cartridge 20 itself as the mechanism for preventing secondary firing and preventing empty firing, the structure is relatively simple, and the anastomat is convenient to manufacture.

[0084] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent features; the 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. A staple cartridge, characterized in that, An end effector for a stapler, the end effector comprising an anvil (50), a cartridge seat (10) and a cutting knife (40), the anvil (50) comprising a first travel groove, the cartridge seat (10) comprising a second travel groove (101) and a biasing clamping groove (102) arranged in sequence and in communication, the biasing clamping groove (102) having a width greater than that of the second travel groove (101), an inner side wall of the biasing clamping groove (102) being arranged offset compared to an inner side wall of the second travel groove (101) to form a stop step (11); The cartridge (20) is arranged detachably on the cartridge seat (10), the cartridge (20) comprising a main body (21) and a resilient cantilever (22) arranged at a proximal end of the main body (21), one end of the resilient cantilever (22) being connected to the main body (21), the other end of the resilient cantilever (22) being a free end (221), an inside of the cartridge (20) being slidably arranged with a wedge block (30); when the wedge block (30) is located at an initial position at the proximal end of the main body (21), the resilient cantilever (22) abuts against the wedge block (30), so that the free end (221) is kept at a guiding position, thereby causing the cutting knife (40) to be guided by the free end (221) to advance into the second travel groove (101) before abutting against the stop step (11); when the wedge block (30) is pushed away from the initial position by the cutting knife (40), the wedge block (30) is separated from the resilient cantilever (22), the free end (221) can be biased to an avoiding position after abutting against the cutting knife (40), thereby not guiding 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).

2. The cartridge of Claim 1, wherein, The cartridge (20) comprises a fixed arm (23) connected to the main body (21), the fixed arm (23) being arranged in parallel and spaced apart with the resilient cantilever (22), the fixed arm (23) being located on a side of the resilient cantilever (22) away from the second travel groove (101); when the wedge block (30) is located at the initial position, part of the wedge block (30) is located between the fixed arm (23) and the resilient cantilever (22) to support the free end (221), so that the free end (221) is kept at the guiding position, thereby guiding the cutting knife (40) when the cutting knife (40) abuts against the free end (221); when the wedge block (30) is pushed away from the initial position by the cutting knife (40), the free end (221) is biased to the avoiding position in a direction close to the fixed arm (23) when abutting against the cutting knife (40) under a biasing force.

3. The cartridge of Claim 2, wherein, The fixed arm (23) is arranged in plurality, the plurality of fixed arms (23) being arranged in parallel and spaced apart, part of the wedge block (30) being located between two adjacent fixed arms (23).

4. The cartridge of Claim 1, wherein, The free end (221) is provided with a guide slope (222), when the guide slope (222) abuts against the cutting knife (40), the pressure applied to the cutting knife (40) biases the cutting knife (40) towards the second travel groove (101).

5. The cartridge of any one of Claims 1-4, wherein, When the elastic cantilever (22) abuts against the wedge block (30), the pressure applied by the elastic cantilever (22) to the wedge block (30) is perpendicular to the moving direction of the wedge block (30).

6. The cartridge of any one of Claims 1-4, wherein, The main body (21) and the elastic cantilever (22) are integrally formed.

7. An end effector of a stapler, characterized by, The end effector comprises an anvil (50), a cartridge seat (10) and a cutting knife (40), the anvil (50) comprises a first travel groove, the cartridge seat (10) comprises a second travel 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 travel groove (101), 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); the end effector further comprises the staple cartridge (20) as claimed in any one of claims 1 to 6.

8. The end effector of claim 7, wherein, The cutting knife (40) comprises a biasing slope (401), the stop step (11) comprises a biasing portion (111) for abutting against the biasing slope (401) to form extrusion to the biasing slope (401) so as to form biasing to the cutting knife (40) to stably abut against the stop step (11).

9. The end effector of claim 7, wherein, The cartridge seat (10) comprises a guide groove (103) arranged at the proximal end of the biasing clamping groove (102), the guide groove (103) is connected in communication with the biasing clamping groove (102), the cartridge seat (10) further comprises a protrusion (12) arranged at the proximal end side wall of the biasing clamping groove (102), the protrusion (12) is used to bias the cutting knife (40) to the side of the biasing clamping groove (102) having the stop step (11).

10. An anastomat characterized by comprising: The anastomat comprises a handle, a shaft assembly extending from the handle and the end effector as claimed in any one of claims 7 to 9 connected to the distal end of the shaft assembly.

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