Staple cartridge, staple cartridge assembly, and stapler

Abstract

The present application relates to the technical field of medical devices, and discloses a staple cartridge, a staple cartridge assembly, and a stapler. In the staple cartridge provided by the present application, a knife passage extends in a first set direction, multiple staple slot groups are distributed on two sides of the knife passage in the width direction of the knife passage, and the numbers of staple slot groups on the two sides of the knife passage are different, so that the stapling firmness and stapling width on the two sides of the knife passage in the width direction thereof are different, and the stapling firmness on the side having a larger number of staple slot groups can be targetedly enhanced, thereby satisfying differentiated stapling requirements on a tissue retention side and a tissue resection side. The present application can improve the stapling effect on a tissue retention side and reduce the amount of bleeding on the tissue retention side, and can also mitigate the problems of excessive stapling on a tissue resection side and staple waste.

Description

Cartridge, cartridge assembly, and stapler

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 2024212999839, filed on June 7, 2024, entitled “Cartridge, cartridge assembly, and stapler”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of medical devices, in particular to a cartridge, a cartridge assembly, and a stapler. BACKGROUND

[0004] A stapler is a medical device commonly used in surgical procedures for tissue stapling. The stapler includes a cartridge assembly, a anvil seat, and other components. During the operation, the cutting knife drives the pusher to move, and the pusher hits the anastomosis staples in the cartridge of the cartridge assembly to fire the anastomosis staples. The fired anastomosis staples pierce the tissue and deform by acting on the anvil seat, thereby completing the stapling operation. At the same time, the cutting knife completes the cutting operation. Generally, the cutting knife has a running path on both sides of which correspond to a tissue retention end and a tissue resection end, and both the tissue retention end and the tissue resection end are subjected to the stapling operation by the anastomosis staples.

[0005] However, when using the stapler in the related art to perform the stapling operation, the tissue retention end has a poor stapling effect and a large amount of bleeding, and the tissue resection end has an excessive stapling function.

[0006] SUMMARY

[0007] Therefore, the present application aims to provide a cartridge, a cartridge assembly, and a stapler to improve the situation that the stapler in the related art causes the tissue retention end to have a poor stapling effect and a large amount of bleeding, and the tissue resection end to have an excessive stapling function.

[0008] To achieve the above-mentioned purpose, the technical solutions adopted by the present application are as follows:

[0009] In a first aspect, the present application provides a cartridge, which has a knife running groove and a plurality of staple groove groups formed thereon. The knife running groove is arranged along a first set direction and is configured to pass through a cutting knife. Each staple groove group includes a plurality of staple grooves distributed along the first set direction, and the staple grooves are configured to install anastomosis staples. The plurality of staple groove groups are arranged in a slot width direction of the knife running groove. At least one staple groove group is distributed on both sides of the knife running groove in the slot width direction, and the number of staple groove groups on both sides of the knife running groove in the slot width direction is different.

[0010] In an optional embodiment, the tool travel groove is arranged along a straight line, and one end of the tool travel groove is provided with a first opening configured to allow the cutting tool to enter the tool travel groove in the first setting direction.

[0011] In an optional embodiment, a plurality of the staple groove groups are equidistantly distributed on the same side of the tool travel groove.

[0012] In an optional embodiment, the staple grooves of two adjacent staple groove groups on the same side of the tool travel groove are staggered.

[0013] In an optional embodiment, the number of the staple groove groups on either side of the tool travel groove along the groove width direction is greater than or equal to two.

[0014] In an optional embodiment, the difference between the number of the staple groove groups on the two sides of the tool travel groove along the groove width direction is less than or equal to two.

[0015] In an optional embodiment, the tool travel groove and the staple groove extend through the staple cartridge in a second setting direction perpendicular to the first setting direction and the groove width direction; the staple cartridge has opposite first and second sides in the second setting direction, and an opening formed by the staple groove on the first side of the staple cartridge is configured to allow a front end of the fired staple to protrude therefrom; the second side of the staple cartridge is provided with a plurality of pusher grooves extending in the first setting direction, the pusher grooves are arranged between two adjacent staple groove groups on the same side of the tool travel groove, the pusher grooves are in communication with the staple grooves of the two adjacent staple groove groups in the groove width direction, and the pusher grooves are configured to allow at least part of a pusher to pass therethrough to push the staples in the staple grooves towards the first side of the staple cartridge.

[0016] In an optional embodiment, one end of the pusher groove is provided with a second opening configured to allow the pusher to pass therethrough in the first setting direction.

[0017] In an optional embodiment, the second side of the staple cartridge is provided with a guide groove extending in the first setting direction, and the guide groove is configured to slidingly cooperate with a guide portion of the pusher.

[0018] In a second aspect, the embodiments of the present application provide a staple cartridge assembly, comprising a pusher and the staple cartridge of any one of the first aspect, wherein the pusher is configured to move relative to the staple cartridge to fire the staples in the staple grooves of the staple cartridge.

[0019] In an optional embodiment, the tool travel grooves and the staple grooves extend through the staple cartridge in a second set direction, which is perpendicular to the first set direction and the groove width direction; the staple cartridge has opposite first and second sides in the second set direction, the openings formed by the staple grooves on the first side of the staple cartridge are configured to allow the tips of the fired staples to protrude therefrom, and the second side of the staple cartridge is provided with a plurality of pusher grooves extending in the first set direction, the pusher grooves being arranged between two adjacent staple groove groups on the same side of the tool travel grooves, and the pusher grooves being in communication with the staple grooves of the two adjacent staple groove groups in the groove width direction.

[0020] The pusher member is arranged on the second side of the staple cartridge, at least partially extends into the pusher grooves, and is movable along the pusher grooves to push the staples in the staple grooves towards the first side of the staple cartridge.

[0021] In an optional embodiment, the pusher member includes a plurality of pusher plates arranged at intervals in the groove width direction, the pusher plates being equal in number to the pusher grooves and being arranged in the pusher grooves one by one.

[0022] In an optional embodiment, one end of each pusher plate in the first set direction is provided with a guide surface, the guide surface being inclined to the first set direction and obliquely facing the second side of the staple cartridge; the guide surface is configured to push the staples towards the first side of the staple cartridge when the pusher plate moves in the first set direction.

[0023] In an optional embodiment, the second side of the staple cartridge is provided with a guide groove extending in the first set direction, and the pusher member further includes a guide portion, the guide groove being in sliding fit with the guide portion of the pusher member.

[0024] In an optional embodiment, the staple cartridge assembly further includes a staple seat and a staple, the staple seat being accommodated in the staple grooves and the pusher grooves, the staple seat including two sub-staple seats connected together, the two sub-staple seats being in sliding fit with the staple grooves of two adjacent staple groove groups respectively, so that the staple seat is movable relative to the staple cartridge in the second set direction, and each sub-staple seat is provided with a staple at one end close to the first side of the staple cartridge.

[0025] In an optional embodiment, the pusher member is configured to move relative to the cartridge in the first setting direction; the cartridge assembly further comprises an elastic limiting unit, the cartridge is provided with a mounting hole, and the elastic limiting unit is mounted at the mounting hole; the elastic limiting unit comprises an elastic force transmission structure and a trigger portion and a limiting portion located at two ends of the elastic force transmission structure, the trigger portion and the limiting portion are respectively arranged close to an inner end and an outer end of the mounting hole, the trigger portion is arranged in a pusher movement path of the pusher member in the first setting direction, and the elastic limiting unit is configured to elastically deform when the trigger portion is pushed by the pusher member, so that the trigger portion exits the pusher movement path; the elastic force transmission structure is configured to apply an elastic driving force extending out of the outer end of the mounting hole to the limiting portion when the trigger portion exits the pusher movement path.

[0026] In an optional embodiment, the cartridge is correspondingly provided with the trigger portion at an end limit position of the pusher movement path of the pusher member.

[0027] In an optional embodiment, the elastic limiting unit is a spring structure, a fixed end of the spring structure is fixedly arranged at an edge of the mounting hole, and the elastic force transmission structure, the trigger portion and the limiting portion are all formed on the spring structure.

[0028] In an optional embodiment, the spring structure is bent to form a first segment, a second segment and a third segment connected in sequence, the first segment forms the fixed end of the spring structure and is fixedly connected with the cartridge, the second segment and the third segment are respectively arranged obliquely relative to the first segment, the third segment is arranged at an angle with the second segment, an opening direction of an angle formed by the second segment and the third segment is consistent with a hole depth direction of the mounting hole, a connecting portion of the second segment and the third segment forms the trigger portion, and the third segment forms the elastic force transmission structure.

[0029] In an optional embodiment, the cartridge assembly further comprises a cartridge cover, the cartridge cover is detachably connected with the cartridge, the cartridge cover forms an accommodation space, the cartridge is arranged in the accommodation space of the cartridge cover, the cartridge cover is provided with a through hole, the through hole is in communication with the mounting hole, and the through hole is configured to pass through the limiting portion; an inner wall of the cartridge cover and an outer wall of the cartridge clamp the fixed end of the spring structure.

[0030] In a third aspect, an anastomat is provided, comprising the cartridge assembly of any one of the second aspect.

[0031] The present application has the following beneficial effects:

[0032] Compared with the related prior art, in the staple cartridge, the staple cartridge assembly and the anastomat of the present application, the tool travel groove of the staple cartridge is arranged along the first setting direction, and the tool travel groove is configured to pass through the cutting knife. When the staple cartridge is applied to the anastomat, specifically, when the anastomat is pressed against the staple cartridge and the anastomosis seat to compress the tissue to be operated, the cutting knife can cut the tissue through the tool travel groove. At the same time, a plurality of staple groove groups are distributed on both sides of the tool travel groove along the groove width direction of the tool travel groove, and the number of staple groove groups on both sides of the tool travel groove is different, so that the anastomosis firmness and the anastomosis width on both sides of the tool travel groove along the groove width direction are different, the anastomosis firmness on the side with more staple groove groups can be improved, and the differentiated anastomosis requirements of the tissue retention end and the tissue resection end can be met. Specifically, the side with more staple groove groups corresponds to the tissue retention end, and the side with fewer staple groove groups corresponds to the tissue resection end, so that the anastomosis requirements of the tissue retention end can be met, the anastomosis effect of the tissue retention end is improved, and the bleeding amount of the tissue retention end is reduced. At the same time, the excessive anastomosis function caused by too many anastomosis staples at the tissue resection end can be avoided, and the waste of anastomosis staples is reduced. Overall, the staple cartridge of the present application is beneficial to improve the utilization rate of anastomosis staples, reduce the bleeding amount of the tissue retention end, and improve the anastomosis effect of the tissue retention end. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0034] FIG. 1 is a schematic view of an anastomat according to an embodiment of the present application;

[0035] FIG. 2 is an assembly schematic view of a staple cartridge seat, a staple cartridge assembly and an anastomosis seat according to an embodiment of the present application;

[0036] FIG. 3 is an exploded schematic view of a staple cartridge seat, a staple cartridge assembly and an anastomosis seat according to an embodiment of the present application;

[0037] FIG. 4 is a partial schematic view of a second side of a staple cartridge according to an embodiment of the present application;

[0038] FIG. 5 is a schematic view of a pusher contacting a plurality of staple seats to achieve staple pushing according to an embodiment of the present application;

[0039] FIG. 6 is a structural schematic view of a pusher according to an embodiment of the present application;

[0040] FIG. 7 is a structural schematic view of a staple cartridge assembly 1 further comprising an elastic limiting unit 12 according to an embodiment of the present application;

[0041] FIG. 8 is a schematic view of an elastic limiting unit according to an embodiment of the present application;

[0042] FIG. 9 is a schematic view of a part of a nail seat according to an embodiment of the present application;

[0043] FIG. 10 is a schematic view of an assembly of a protection member of a cartridge assembly according to an embodiment of the present application.

[0044] Legend: 1 - cartridge assembly; 11 - cartridge; 111 - mounting hole; 112 - first side wall; 113 - tool path groove; 1131 - first opening; 114 - nail groove group; 1141 - nail groove; 115 - insertion slot; 116 - push nail groove; 1161 - second opening; 117 - guide groove; 12 - elastic limiting unit; 121 - trigger part; 122 - limiting part; 123 - elastic force transmission structure; 12a - first section; 12b - second section; 12c - third section; 12d - insertion section; 13 - push nail member; 131 - push nail plate; 1311 - guide surface; 132 - guide part; 14 - cartridge cover; 141 - via hole; 15 - nail seat; 151 - sub nail seat; 16 - protection member; 161 - clamping part; 2 - cartridge seat; 21 - groove structure; 3 - nail seat; 31 - shaped groove; 311 - groove; 4 - anastomotic nail. DETAILED DESCRIPTION

[0045] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be understood as limiting the present application.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0047] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered sequence. Thus, features referring to "first", "second" etc. can include one or more of the features, explicitly or implicitly.

[0048] In the present application, unless specifically stated and limited otherwise, a first feature is "on", "above", or "over" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact with an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature can be directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0049] In the staple cartridge assembly of the anastomat of the related art, the number of anastomosis staples on both sides of the running path of the cutting knife is designed to be consistent, which makes the anastomosis width of the tissue reservation end and the tissue resection end anastomosed by the anastomosis staples consistent when the tissue anastomosis operation is performed using the anastomat of the related art. However, the inventors found that the tissue reservation end and the tissue resection end have different requirements for the degree of anastomosis. When the anastomat of the related art is used, the tissue reservation end will have a problem of excessive bleeding due to insufficient number of anastomosis staples, which will affect the anastomosis effect. However, the tissue resection end will have a problem of excessive anastomosis function and waste of anastomosis staples due to excessive number of anastomosis staples.

[0050] In order to improve at least one of the above-mentioned deficiencies in the related art, the present application provides a staple cartridge, a staple cartridge assembly and an anastomat. By distributing different numbers of staple slots on both sides of the knife running groove on the staple cartridge, different numbers of anastomosis staples can be configured, thereby meeting the differentiated requirements of the tissue resection end and the tissue reservation end for the degree of anastomosis, improving the anastomosis effect, and reducing the waste of anastomosis staples.

[0051] The staple cartridge, the staple cartridge assembly and the anastomat provided by the embodiments of the present application are described below with reference to the accompanying drawings. In the drawings, the Z axis represents the vertical direction, i.e. the up-down position, and the positive direction of the Z axis, i.e. the direction in which the arrow of the Z axis points, represents up, and the negative direction of the Z axis represents down; the X axis represents the front-rear position, and the positive direction of the X axis, i.e. the direction in which the arrow of the X axis points, represents the front side, and the negative direction of the X axis represents the rear side; the Y axis represents the horizontal direction, and represents the left-right position, and the positive direction of the Y axis, i.e. the direction in which the arrow of the Y axis points, represents the right side, and the negative direction of the Y axis represents the left side; it should be noted that the above-mentioned meanings of the Z axis, the Y axis and the X axis are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0052] FIG. 1 is a schematic view of an anastomat according to an embodiment of the present application. As shown in FIG. 1, the anastomat according to the embodiment of the present application comprises a driving body 01, a transmission assembly 02, a cutting knife (not shown in the figure), a staple cartridge seat 2, a staple abutting seat 3 and a staple cartridge assembly 1. The transmission assembly 02 is connected between the staple cartridge assembly 1 and the driving body 01, the driving body 01 provides driving force, and the driving force is transmitted to the cutting knife through the transmission assembly 02, so that the cutting knife and the pusher 13 in the staple cartridge assembly 1 can slide synchronously in the staple cartridge assembly 1, thereby realizing the cutting and anastomosis of the tissue. In the embodiment shown in FIG. 1, the staple cartridge seat 2, the staple abutting seat 3 and the staple cartridge assembly 1 are all located at the front end of the anastomat. The anastomat can be applied in laparoscopic surgery, for example, in the resection of diseased tissue, which is not a limitation.

[0053] FIG. 2 is an assembly view of the staple cartridge seat, the staple cartridge assembly and the staple abutting seat according to an embodiment of the present application; and FIG. 3 is an exploded view of the staple cartridge seat, the staple cartridge assembly and the staple abutting seat according to an embodiment of the present application. As shown in FIG. 2 and FIG. 3, in the embodiment, the staple cartridge seat 2 is configured to fixedly mount the staple cartridge assembly 1, the staple abutting seat 3 is configured to jointly hold the tissue to be anastomosed with the staple cartridge assembly 1, and is configured to abut against the anastomosis staple 4 fired out of the staple cartridge assembly 1 to deform the anastomosis staple 4 and realize the anastomosis of the tissue. Optionally, the staple abutting seat 3 is rotatably connected to one end of the staple cartridge seat 2, so that the staple abutting seat 3 and the staple cartridge seat 2 can move relatively to open and close.

[0054] The staple cartridge assembly 1 according to the embodiment of the present application comprises a staple cartridge 11, a pusher 13, a staple seat 15 and an anastomosis staple 4. The anastomosis staple 4 is mounted on the staple seat 15, and the staple cartridge 11 is configured to accommodate the staple seat 15 and the anastomosis staple 4 before the anastomosis operation. The pusher 13 is configured to move relative to the staple cartridge 11 under the driving of the driving body 01 to fire the anastomosis staple 4 out of the staple cartridge 11 and into the tissue, thereby realizing the anastomosis operation.

[0055] In the embodiment of the present application, the cartridge 11 is formed with a knife slot 113 and a plurality of staple slot groups 114. The knife slot 113 extends along a first set direction (parallel to the extension direction of the X axis in the figure) and is configured to pass the cutting knife. When the cartridge 11 is used, the cutting knife can smoothly pass through the knife slot 113, thereby completing the cutting operation.

[0056] The plurality of staple slot groups 114 are distributed along the slot width direction of the knife slot 113 (parallel to the Y axis direction in the figure). At least one staple slot group 114 is distributed on both sides of the knife slot 113 in the slot width direction, and the number of staple slot groups 114 on both sides of the knife slot 113 is different. Each staple slot group 114 includes a plurality of staple slots 1141 distributed along the first set direction. In other words, a staple slot group 114 is composed of a row of staple slots 1141 arranged along the first set direction. The staple slot 1141 is configured to install the anastomosis needle 4. The anastomosis needle 4 is fired by the movement of the pusher 13, which will be described later.

[0057] Since the knife slot 113 of the cartridge 11 extends along the first set direction, the knife slot 113 can limit the movement of the cutting knife along the first set direction. During the operation, the stapler compresses the tissue to be operated by the anvil 3 and the cartridge 11, and the cutting knife can pass through the knife slot 113 to perform the cutting operation. At the same time, the plurality of staple slot groups 114 are distributed along the slot width direction of the knife slot 113 on both sides of the knife slot 113, and the number of staple slot groups 114 on both sides of the knife slot 113 is different. Therefore, the anastomosis firmness and the anastomosis width on both sides of the knife slot 113 along the slot width direction are different. The anastomosis firmness on the side with more staple slot groups 114 can be improved, and the differential anastomosis requirements of the tissue retention end and the tissue excision end can be met. Specifically, the side with more staple slot groups 114 corresponds to the tissue retention end, and the side with fewer staple slot groups 114 corresponds to the tissue excision end. The anastomosis requirements of the tissue retention end can be met, the bleeding amount of the tissue retention end is reduced, the anastomosis effect of the tissue retention end is improved, and the problem of excessive anastomosis function caused by too many anastomosis needles 4 on the tissue excision end and the waste of anastomosis needles 4 is solved. Overall, the present application can improve the utilization rate of anastomosis needles 4, reduce the bleeding amount of the tissue retention end, and improve the anastomosis effect of the tissue retention end.

[0058] As shown in FIG. 3, optionally, the knife slot 113 extends along a straight line, and one end of the knife slot 113 is provided with a first open port 1131 for the cutting knife to pass through. Specifically, the first open port 1131 is arranged at the rear end of the knife slot 113, that is, the end facing the negative direction of the X axis in the figure. In this arrangement, the cutting knife can enter the knife slot 113 through the first open port 1131 along the first set direction and move linearly along the first set direction to perform the cutting action. Therefore, the cartridge 11 of the present embodiment can be applied to a linear stapler for anastomosis in a linear direction, and has a simple structure and strong practicality.

[0059] As shown in FIG. 3, optionally, the number of the staple groove groups 114 on either side of the tool travel groove 113 along the groove width direction is greater than or equal to two. In other words, the number of the staple groove groups 114 on the left and right sides of the tool travel groove 113 is greater than two; optionally, the number of the staple groove groups 114 on the left side is three groups, and the number of the staple groove groups 114 on the right side is two groups (not shown in the scheme diagram). By such arrangement, the number of the staple groove groups 114 on both sides of the tool travel groove 113 can be prevented from being too small to affect the anastomosis effect at the corresponding position.

[0060] Optionally, the difference between the number of the staple groove groups 114 on both sides of the tool travel groove 113 along the groove width direction is less than or equal to two. For example, the number of the staple groove groups 114 on the left side of the tool travel groove 113 is greater than the number of the staple groove groups 114 on the right side of the tool travel groove 113, and the difference between the number of the staple groove groups 114 on the left side and the number of the staple groove groups 114 on the right side is one or two.

[0061] As shown in FIG. 3, optionally, four staple groove groups 114 are arranged on the left side of the tool travel groove 113, and two staple groove groups 114 are arranged on the right side of the tool travel groove 113. In other optional embodiments, three staple groove groups 114 are arranged on the left side of the tool travel groove 113, and two staple groove groups 114 are arranged on the right side of the tool travel groove 113 (not shown in the scheme diagram).

[0062] By such arrangement, the difference between the number of the staple groove groups 114 on both sides of the tool travel groove 113 can be prevented from being too large to cause the total size of the staple cartridge 11 along the groove width direction of the tool travel groove 113 to be too large, thereby affecting the applicability of the anastomosis device.

[0063] It should be understood that the relative positional relationship between the plurality of staple groove groups 114 along the groove width direction of the tool travel groove 113, i.e., the Y-axis direction in the figure, can be arranged according to actual needs. Optionally, the plurality of staple groove groups 114 on the same side of the tool travel groove 113 are equidistantly distributed; optionally, the staple grooves 1141 of the adjacent two staple groove groups 114 are distributed in a staggered manner, so that the anastomosis staples 4 after anastomosis are arranged in multiple rows in the Y-axis direction, and the anastomosis staples 4 of the adjacent two rows on the same side are distributed in a staggered manner, which can ensure the anastomosis effect.

[0064] Fig. 4 is a schematic view of the second side of the cartridge according to an embodiment of the present application. As shown in Fig. 4, the knife slot 113 and the staple slot 114 extend through the cartridge in a second set direction (parallel to the Z-axis direction in the figure), which is perpendicular to the first set direction and the slot width direction. The cartridge 11 has opposite first and second sides in the second set direction, and the first side of the cartridge 11 is shown in Figs. 2 and 3, and the second side of the cartridge 11 is shown in Fig. 4. The openings of the staple slots 1141 formed on the first side of the cartridge 11 are configured to allow the tips of the fired staples 4 to protrude therefrom. The second side of the cartridge 11 is provided with a plurality of pusher slots 116 extending in the first set direction, and each pusher slot 116 is arranged between two adjacent staple slot groups 114 on the same side of the knife slot 113. The pusher slots 116 are in communication with the staple slots 1141 of the two adjacent staple slot groups 114 in the slot width direction. The pusher 13 is arranged on the second side of the cartridge 11 and is configured to move relative to the cartridge 11 in the first set direction. The pusher 13 at least partially extends into the pusher slots 116 and is movable along the pusher slots 116 to push the staples 4 in the staple slots 1141 towards the first side of the cartridge 11. The pusher slots 116 are configured to allow at least a portion of the pusher 13 to pass therethrough, so that the staples 4 in the staple slots 1141 can be pushed by the pusher 13 to move towards the first side of the cartridge 11. It can be understood that, when the pusher 13 moves along the pusher slots 116, it can directly or indirectly abut against the staples 4, and the staples 4 can be pushed by the pusher 13 to move towards the first side of the cartridge 11, thereby perforating and stapling the tissue pressed against the first side of the cartridge 11.

[0065] Fig. 5 is a schematic view of the pusher contacting the plurality of staple seats to push the staples according to an embodiment of the present application; and Fig. 6 is a schematic view of the structure of the pusher according to an embodiment of the present application. As shown in Figs. 2 to 6, the pusher 13 can optionally include a plurality of pusher plates 131 arranged at intervals in the slot width direction of the knife slot 113, and the pusher plates 131 are inserted into the pusher slots 116 in a one-to-one correspondence with the number of the pusher slots 116. In this embodiment, one pusher slot 116 is arranged on one side of the slot width direction of the knife slot 113, and two pusher slots 116 are arranged on the other side, and therefore, the number of the pusher plates 131 corresponds to three. The staples 4 are slidably mounted in the staple slots 1141 by the staple seats 15 in the up-down direction, and the pusher plates 131 move in the push direction (for example, the positive direction of the X-axis in the figure) to push the staple seats 15 upward to fire, so that the staples 4 can be perforated from the first side of the cartridge 11.

[0066] In the embodiments of the present application, the staple seat 15 is accommodated in the staple groove 1141 and the push-staple groove 116, and the staple seat 15 is configured to support the anastomat staple 4. For example, at least part of the staple seat 15 (such as each staple seat 15) comprises two sub-staple seats 151 connected in series, and the two sub-staple seats 151 are distributed along the slot width direction of the tool path groove 113. The two sub-staple seats 151 are respectively in sliding fit with the staple grooves 1141 in the two adjacent staple groove groups 114, so that the staple seat 15 can move relative to the cartridge 11 in the second set direction (the direction in which the Z axis extends in the figure, that is, the up-down direction). The two anastomat staples 4 are respectively arranged on one end of the two sub-staple seats 151 close to the first side of the cartridge 11, in other words, one anastomat staple 4 is mounted on the upward end of each sub-staple seat 151, and the two sub-staple seats 151 are slidably mounted in the staple grooves 1141 of different staple groove groups 114 in the up-down direction. It can be understood that the staple seat 15 spans between the two different staple groove groups 114, and the middle part is located in the push-staple groove 116, so that the push-staple plate 131 can push the entire staple seat 15 to move in the second set direction when the push-staple plate 131 moves in the push-staple groove 116. Alternatively, the staple seat 15 can be integrally formed, or can be assembled by two sub-staple seats 151.

[0067] Alternatively, one end of the push-staple plate 131 in the first set direction is provided with a guide surface 1311, which is inclined to the first set direction and obliquely faces the second side of the cartridge 11; the guide surface 1311 is configured to push the anastomat staple 4 to move towards the first side of the cartridge 11 when moving in the first set direction. When the cutting knife drives the push-staple member 13 to move from back to front, the guide surface 1311 of the push-staple plate 131 contacts the bottom of the staple seat 15, and when the push-staple plate 131 continues to move in the first set direction, the staple seat 15 cannot move in the first set direction due to the limitation of the staple groove 1141, so that the relative sliding between the guide surface 1311 and the staple seat 15 occurs, and the staple seat 15 is forced to move in the second set direction towards the first side of the cartridge 11, thereby pushing the staple seat 15 to slide upwards relative to the cartridge 11, and achieving the firing of the anastomat staple 4.

[0068] Alternatively, one end of the push-staple groove 116 is provided with a second opening 1161, which is configured to allow the push-staple member 13 to pass through in the first set direction. Alternatively, part of the push-staple member 13 can enter the push-staple groove 116 from the second opening 1161 along the first set direction. In the embodiments of the present application, the second opening 1161 and the first opening 1131 are located at the same end of the cartridge 11.

[0069] Optionally, the pushing element 13 further comprises a guide portion 132, and the second side of the staple cartridge 11 is provided with a guide groove 117 extending along the first setting direction, and the guide groove 117 is in sliding fit with the guide portion 132 of the pushing element 13. Through the cooperation of the guide portion 132 and the guide groove 117, the pushing element 13 can move more stably relative to the staple cartridge 11. Optionally, the guide portion 132 is plate-shaped, and the guide portion 132 is arranged in parallel and spaced apart between the pushing plates 131. Optionally, the guide portion 132 is arranged on one side of the pushing plates 131 in the slot width direction of the tool travel groove 113; optionally, the guide portion 132 is located on the side of the tool travel groove 113 with fewer staple slot groups 114, so that the cooperation stability of the pushing element 13 on both sides in the slot width direction with the staple cartridge 11 is more balanced.

[0070] FIG. 7 is a structural schematic view of the staple cartridge assembly 1 when the elastic limiting unit 12 is further included in an embodiment of the present application; and FIG. 8 is a setting schematic view of the elastic limiting unit 12 in an embodiment of the present application. As shown in FIGS. 7 and 8, optionally, the sliding direction of the pushing element 13 is consistent with the extension direction of the tool travel groove 113 of the staple cartridge 11; the staple cartridge assembly 1 further comprises the elastic limiting unit 12, the staple cartridge 11 is provided with a mounting hole 111, and the elastic limiting unit 12 is mounted at the mounting hole 111; the elastic limiting unit 12 comprises an elastic force transmission structure 123 and trigger portions 121 and limiting portions 122 located at both ends of the elastic force transmission structure 123, the trigger portions 121 and the limiting portions 122 are respectively arranged close to the inner end and the outer end of the mounting hole 111, the trigger portions 121 are arranged in the pushing movement path of the pushing element 13 along the first setting direction, and the elastic limiting unit 12 is configured to be elastically deformed when the trigger portions 121 are pushed by the pushing element 13, so that the trigger portions 121 exit the pushing movement path; the elastic force transmission structure 123 is configured to apply an elastic driving force to the limiting portions 121 to extend out of the outer end of the mounting hole 111 when the trigger portions exit the pushing movement path.

[0071] In the present embodiment, the limiting portions 122 are arranged corresponding to a setting region of the outer surface of the staple cartridge 11, and the setting region is a region of the outer surface of the staple cartridge 11 opposite to the cartridge seat 2 after the staple cartridge 11 is assembled in the cartridge seat 2. In this way, in the state that the staple cartridge assembly 1 is assembled in the cartridge seat 2, the limiting portions 121 abut against the inner wall of the cartridge seat 2 when driven by the elastic force transmission structure 123 to extend out of the outer end of the mounting hole 111, and the elastic limiting unit 12 is in a compressed state and accumulates elastic potential energy.

[0072] In the present embodiment, the staple cartridge assembly 1 is installed in the staple cartridge seat 2. Optionally, the staple cartridge seat 2 is formed with a groove structure 21, and the staple cartridge assembly 1 is installed in the groove structure 21, with at least the top end of the staple cartridge assembly 1 exposed outside the groove structure 21, so that the subsequent anastomosis staples 4 can be pushed out from the top end of the staple cartridge assembly 1 to contact the anvil 3. Optionally, the outer surface of the staple cartridge 11 is provided with a region opposite to the inner side wall of the groove structure 21. It can be understood that when the limiting portion 121 is extruded by the pusher 13 to exit the pusher movement path, the staple cartridge seat 2 abuts against the limiting portion 121 so that the elastic limiting unit 12 is compressed in the groove width direction of the knife groove 113; after the stapling operation is completed, the staple cartridge assembly 1 is taken out of the groove structure 21, and the staple cartridge seat 2 releases the abutting limiting of the limiting portion 121, so that the limiting portion 121 will be extruded outward under the elastic driving force of the elastic force transmission structure 123. Thereafter, the staple cartridge assembly 1 cannot be installed into the groove structure 21 of the staple cartridge seat 2 again due to the limiting action of the limiting portion 121.

[0073] In the present embodiment, the staple cartridge assembly 1 further comprises a staple cartridge cover 14, which is located at the back side of the staple cartridge 11 and detachably connected with the staple cartridge 11, and the staple cartridge assembly 1 is connected with the staple cartridge seat 2 through the staple cartridge cover 14. Optionally, the staple cartridge cover 14 forms an accommodation space, and the staple cartridge 11 is arranged in the accommodation space of the staple cartridge cover 14.

[0074] The pusher 13 is partially located between the staple cartridge cover 14 and the staple cartridge 11, and the staple cartridge cover 14 and the staple cartridge 11 jointly realize the sliding guidance of the pusher 13 in the first specified direction. The pushing direction of the pusher 13 is from back to front, specifically, when the stapler is inserted into the pre-set position and the anvil 3 and the staple cartridge seat 2 are closed to compress the tissue to be sutured, the pusher 13 moves from back to front under the driving action (such as the pushing action of the cutting knife), driving the anastomosis staples 4 to be fired in sequence from back to front, for example, upward, and the fired anastomosis staples 4 impact the shaped grooves 31 on the anvil 3, so that the anastomosis staples 4 complete the suturing through deformation, for example, the anastomosis staples 4 are deformed into B shape through contact with the shaped grooves 31, which can meet the anastomosis requirement.

[0075] FIG. 9 is a partial schematic view of the anvil in an embodiment of the present application. As shown in FIG. 9, the side of the anvil 2 facing the staple cartridge assembly 1 is provided with a plurality of shaped grooves 31, the number of which is the same as that of the staple grooves 1141 on the staple cartridge, and when the anvil 2 is buckled, the plurality of shaped grooves 31 and the plurality of staple grooves 1141 are opposite in the second specified direction. Since the anastomosis staples 4 have two sharp ends, each shaped groove 31 has a pair of two grooves 311, so that the two sharp ends of the anastomosis staples 4 can be bent and deformed in the direction of approaching each other when they are inserted into the two grooves 311 respectively, and finally the anastomosis staples 4 are deformed into B shape.

[0076] It should be noted that when the pusher 13 is located at its initial extreme position, i.e. at the rear end position of the cartridge 11, for example when the cartridge 11 of the cartridge assembly 1 is full of staples 4, the pusher 13 is not in contact with the trigger portion 121, and thus the trigger portion 121 is located in the movement path of the pusher 13 along its pushing movement, and the limiting portion 122 will not move out of the cartridge 11 due to the action of the trigger portion 121 by the pusher 13. Alternatively, when the trigger portion 121 is not acted on by the pusher 13, the limiting portion 122 is not in contact with the cartridge seat 2, for example, is not in contact with the inner wall surface of the slot-shaped structure 21 of the cartridge seat 2, and the cartridge assembly 1 can be more smoothly loaded into the slot-shaped structure 21 of the cartridge seat 2.

[0077] In the present specification, the installation hole 111 is located at the first side wall 112 of the cartridge 11, and the first side wall 112 is the side plate of the cartridge 11 along the width direction (i.e. the slot width direction of the tool path groove 113). It should be understood that it is not limited thereto, for example, the installation hole 111 can also be provided on the bottom plate of the cartridge 11, which will not be described in detail here.

[0078] The trigger portion 121 of the elastic limiting unit 12 is located close to the inner end of the installation hole 111, for example, the trigger portion 121 of the elastic limiting unit 12 is located on the side of the inner end face of the installation hole 111 away from the outer end face, and is located in the movement path of the pusher 13 along its pushing direction (defined as moving from rear to front).

[0079] The limiting portion 122 of the elastic limiting unit 12 is located close to the outer end of the installation hole 111, for example, the limiting portion 122 of the elastic limiting unit 12 is located on the side of the outer end face of the installation hole 111 close to the inner end face, and the limiting portion 122 is provided corresponding to the set region of the outer surface of the cartridge 11, and the set region is the region of the outer surface of the cartridge 11 for being opposite to the slot-shaped structure 21 of the cartridge seat 2 for installing the cartridge assembly 1, for example, is opposite to the inner wall of the slot-shaped structure 21 on the cartridge seat 2.

[0080] The specific structure of the elastic limiting unit 12 is not limited, and it only needs to have an elastic force transmission structure 123 and trigger portions 121 and limiting portions 122 located at both ends of the elastic force transmission structure 123. The elastic force transmission structure 123 is configured to transmit elastic force between the trigger portions 121 and the limiting portions 122. For example, when any one of the limiting portions 122 and the trigger portions 121 is unblocked in the left-right direction, and the other one is pressed in the left-right direction, the second one of the limiting portions 122 and the trigger portions 121 can move together through the elastic force transmission structure 123. When any one of the limiting portions 122 and the trigger portions 121 is blocked in the left-right direction, and the other one is pressed in the left-right direction, the potential energy of the elastic force transmission structure 123 increases, thereby meeting the requirement that the distance by which the limiting portions 122 and the trigger portions 121 are pressed in the left-right direction is reduced.

[0081] In this way, the sliding direction of the pusher 13 is consistent with the extension direction of the tool groove 113 of the cartridge 11. The mounting hole 111 is arranged on the cartridge 11, and the elastic limiting unit 12 is mounted in the mounting hole 111, thereby achieving the mounting of the elastic limiting unit 12 on the cartridge 11. The elastic limiting unit 12 includes the elastic force transmission structure 123 and the trigger portions 121 and the limiting portions 122 located at both ends of the elastic force transmission structure 123. The trigger portions 121 and the limiting portions 122 are arranged close to the inner end and the outer end of the mounting hole 111, respectively. When the cartridge assembly 1 is mounted on the cartridge seat 2 of the stapler, the limiting portions 122 are arranged corresponding to a specified region of the outer surface of the cartridge 11. The specified region is the region of the outer surface of the cartridge 11 that is used to abut against the cartridge seat 2. When the pusher 13 moves along its pushing direction, for example, moves from back to front, and contacts the trigger portions 121, at least part of the staples 4 in the cartridge 11 are fired. The trigger portions 121 move outward of the cartridge 11 under the pushing action of the pusher 13. The elastic force transmission structure 123 drives the limiting portions 122 to move outward of the cartridge 11 under the action of the trigger portions 121, so that the limiting portions 122 abut against the inner wall of the groove-shaped structure 21 of the cartridge seat 2. At this time, the potential energy of the elastic force transmission structure 123 is large, but it does not affect the normal use of the cartridge assembly 1 in the cartridge seat 2. The cartridge assembly 1 can be normally dismounted from the cartridge seat 2. If the cartridge assembly 1 is dismounted from the cartridge seat 2, the abutting action of the limiting portions 122 by the cartridge seat 2 is removed. Under the potential energy of the elastic force transmission structure 123, the limiting portions 122 move outward of the cartridge 11, so that the size of the cartridge assembly 1 at the limiting portions 122 is large, and a stop is essentially formed. Specifically, a block is formed when the cartridge assembly 1 in this state is mounted into the cartridge seat 2 again. That is, the difficulty of mounting the cartridge assembly 1 in which at least part of the staples 4 are fired into the cartridge seat 2 is greatly increased, thereby preventing the mis-mounting of the cartridge assembly 1 in which at least part of the staples 4 are fired to a certain extent.

[0082] As shown in FIGS. 7 and 8, optionally, the staple cartridge 11 is correspondingly provided with a trigger portion 121 at the end limit position of the pusher movement path of the pusher 13.

[0083] The staple cartridge assembly 1 of the present embodiment only includes one elastic limiting unit 12, and the elastic limiting unit 12 only includes one trigger portion 121 and one limiting portion 122. In this case, the position of the mounting hole 111 corresponds to the end limit position of the pusher 13, and the present application will be described hereinafter based on this.

[0084] However, it should be understood that it is not limited thereto. For example, the number of mounting holes 111 can be set to be multiple, and the number of elastic limiting units 12 can be correspondingly set to be multiple. Alternatively, the elastic limiting unit 12 can include multiple trigger portions 121, corresponding elastic force transmission structures 123, and limiting portions 122. In this case, when the pusher 13 completes the pushing of different numbers of anastomosis staples 4 and is located at different positions, the disassembly of the staple cartridge assembly 1 and the anti-misloading of the staple cartridge assembly 1 after the disassembly can be realized by triggering the corresponding trigger portion 121. It can be configured according to actual needs, and will not be described in detail here.

[0085] It should be understood that the end limit position is the position where the pusher 13 is located at the most front end of the staple cartridge 11. When the pusher 13 is located at the end limit position, all the anastomosis staples 4 in the staple cartridge 11 are in the fired state, that is, the staple cartridge 11 is in the empty cartridge state. In this way, when the staple cartridge assembly 1 is disassembled from the staple cartridge seat 2, the limiting portion 122 of the elastic limiting unit 12 can realize the anti-misloading protection of the empty cartridge staple cartridge assembly 1, so as to avoid the assembly of the empty cartridge staple cartridge assembly 1 to the staple cartridge seat 2 and cause adverse consequences.

[0086] Optionally, the staple cartridge assembly 1 is configured to be connected with the staple cartridge seat 2 through the staple cartridge cover 14. The staple cartridge cover 14 is provided with a through hole 141, the through hole 141 is in communication with the mounting hole 111, and the through hole 141 is configured to pass through the limiting portion 122.

[0087] Specifically, the staple cartridge cover 14 is detachably connected with the staple cartridge 11, for example, a clamping connection; the staple cartridge assembly 1 is connected with the groove-shaped structure 21 of the staple cartridge seat 2 through the staple cartridge cover 14, for example, a clamping connection, and the specific connection mode of the two can adopt related technologies, for example, the related technologies of the applicant of the present application before the application date, which will not be described in detail here.

[0088] In this way, on the basis of protecting the bottom of the staple cartridge 11 through the staple cartridge cover 14, it can be ensured that the limiting portion 122 can smoothly move to the outside of the staple cartridge 11, for example, move in the left-right direction and abut against the inner wall of the groove-shaped structure 21 of the staple cartridge seat 2, or form the anti-misloading of the empty cartridge staple cartridge assembly 1.

[0089] Optionally, the elastic limiting unit 12 is a spring structure, a fixed end of the spring structure is fixedly arranged at an edge of the mounting hole 111, and the elastic force transmission structure 123, the triggering portion 121 and the limiting portion 122 are all formed on the spring structure.

[0090] Specifically, the spring structure can be formed by one spring, in this case, the elastic force transmission structure 123, the triggering portion 121 and the limiting portion 122 are formed by the spring structure, and the elastic limiting unit 12 has simple structure and high reliability. In other embodiments, the spring structure can also be formed by connecting multiple springs, which is not limited as long as it can meet the use requirements.

[0091] As shown in FIG. 8, optionally, the spring structure is bent to form a first segment 12a, a second segment 12b and a third segment 12c connected in sequence, the first segment 12a forms a fixed end of the spring structure, and is fixedly connected with the nail cartridge 11 at a circumferential side of the mounting hole 111, the second segment 12b and the third segment 12c are respectively arranged obliquely relative to the first segment 12a, the third segment 12c is arranged at an angle with the second segment 12b, and the opening direction of the angle formed by the second segment 12b and the third segment 12c is consistent with the hole depth direction of the mounting hole 111, the connecting part of the second segment 12b and the third segment 12c forms the triggering portion 121, and the third segment 12c forms the elastic force transmission structure 123.

[0092] For example, the spring structure is adhered to the nail cartridge 11 at the first segment 12a, so that the fixed end of the spring structure is fixed at the position of the nail cartridge 11, and the inner wall of the nail cartridge cover 14 and the outer wall of the nail cartridge 11 hold the fixed end of the spring structure. The limiting portion 122 is arranged at one end of the third segment 12c close to the outside of the mounting hole 111, the triggering portion 121 is arranged at one end of the third segment 12c close to the inside of the mounting hole 111, and the second segment 12b is arranged obliquely relative to the first segment 12a.

[0093] In this way, a single spring is bent to form the elastic limiting unit 12, without the need to use multiple components to form the elastic limiting unit 12, so that the third segment 12c can move relative to the first segment 12c as a whole, and the position of the third segment 12c can be reset through the second segment 12b, for example, one end of the third segment 12c close to the second segment 12b can move relative to the first segment 12a in the depth direction of the mounting hole 111, that is, the left-right direction. The third segment 12c is arranged obliquely relative to the first segment 12a, so that the triggering portion 121 and the limiting portion 122 of the third segment 12c can move relatively and accumulate potential energy to a certain extent through the elastic deformation of the third segment 12c, and the relative position of the triggering portion 121 and the limiting portion 122 can be reset through the deformation of the third segment 12c itself, so that the structure is simple and practical.

[0094] As shown in FIG. 8, optionally, the first section 12a is connected with a plug-in section 12d, the cartridge 11 is provided with a slot 115, and the plug-in section 12d is inserted into the slot 115. Exemplarily, the first section 12a is bent at an end away from the second section 12b to form the plug-in section, and the depth direction of the slot 115 can be consistent with the depth direction of the mounting hole 111.

[0095] Exemplarily, when the first section 12a is attached to the cartridge 11 at the outer end surface of the mounting hole 111, the end of the first section 12a away from the second section 12b is bent inwardly of the cartridge 11 to form the plug-in section. In this way, by the plug-in connection of the plug-in section 12d and the slot 115, the reliability of the connection between the fixed end of the spring structure and the cartridge 11 can be improved.

[0096] It should be understood that one or more of the trigger portion 121 and the limiting portion 122 can be provided with a guide slope for contact guidance as needed, for example, one or more of the trigger portion 121 and the limiting portion 122 can be provided as a ball convex structure, so that when the pusher 13 contacts the trigger portion 121, the contact surface damage caused by scratching can be avoided, and when the limiting portion 122 contacts the cartridge seat 2, the contact surface damage caused by scratching can be avoided, the service life of the component is improved, and the possibility of abnormal sound and debris caused by scratching is reduced.

[0097] In the above embodiments, optionally, the cartridge seat 2 is provided with a slot structure 21, the cartridge assembly 1 can be placed into the slot structure 21 along a first designated direction, and the first section 12a, the second section 12b, and the third section 12c are connected in sequence along the first designated direction.

[0098] Optionally, the cartridge assembly 1 is configured to be moved from front to back to be placed into the slot structure 21, and the first section 12a, the second section 12b, and the third section 12c are distributed in sequence from front to back, at this time, the end of the third section 12c forms the limiting portion 122, and the other end forms the trigger portion 121, when the pusher 13 of the cartridge assembly 1 contacts the trigger portion 121 and the cartridge assembly 1 is in a disassembled state, if the cartridge assembly 1 needs to be moved from front to back and pushed into the slot structure 21, at this time, the limiting portion 122 at the end of the third section 12c protrudes beyond the outer surface of the cartridge assembly 1, for example, beyond the outer surface of the cartridge cover 14 in the left-right direction, and the front end surface of the slot structure 21 of the cartridge seat 2 will abut against the limiting portion 122, as the cartridge assembly 1 is pushed from front to back, the limiting portion 122 has a tendency to move forward relative to the first section 12a under stress, and at least initially has a tendency to expand outwardly, so that it is more difficult to move the cartridge assembly 1 from front to back and push it into the slot structure 21, and a better anti-misassembly effect is achieved.

[0099] As shown in FIG. 8, in the above embodiments, the cartridge cover 14 presses the fixed end of the spring structure at the end surface of the outer end of the mounting hole 111.

[0100] Specifically, the inner surface of the staple cartridge cover 14 in the left-right direction presses the first section 12a against the end face of the outer end of the mounting hole 111 and keeps the insertion section 12d in the insertion state of the insertion slot 115, thereby ensuring the reliability of the connection between the spring structure and the staple cartridge 11.

[0101] At this time, it should be understood that the staple cartridge 11 can be provided with a receiving groove at the end face of the outer end of the mounting hole 111, and the receiving groove is configured to receive the spring structure, such as the first section 12a.

[0102] As shown in FIG. 8, in the above embodiment, the first side wall 112 on each of the two width direction sides of the staple cartridge 11 is provided with a mounting hole 111 and an elastic limiting unit 12. Optionally, the two mounting holes 111 and the two elastic limiting units 12 are symmetrically arranged in the left-right direction. In this way, when mistaken installation is prevented, the left and right sides of the staple cartridge assembly 1 are both hindered by the two limiting parts 122, and the force is more balanced, which avoids the damage of the staple cartridge assembly 1 caused by the uneven force on the left and right sides, and has high reliability.

[0103] It should be understood that the structure of the elastic limiting unit 12 is exemplarily described above, but it is not limited thereto. For example, in another optional scheme of the spring structure, the second section 12b can be connected to the third section 12c between the two ends of the third section 12c, which will not be described in detail here.

[0104] FIG. 10 is an assembly diagram of the protection piece 16 of the staple cartridge assembly 1 in an embodiment of the present application. As shown in FIG. 10, optionally, the staple cartridge assembly 1 further comprises a protection piece 16, which covers the first side of the staple cartridge 11 before the anastomosis operation, thereby protecting the first side of the staple cartridge 11. For example, the protection piece 16 can prevent external foreign matter from entering the staple slot 1141 of the staple cartridge 11, and also can prevent the anastomosis staple 4 from falling out of the staple slot 1141. Optionally, the protection piece 16 is respectively provided with one or more clamping parts 161 in the left-right direction, and the clamping parts 161 can be clamped and matched with the staple cartridge 11 or the staple cartridge seat 2, so that the protection piece 16 is not easy to fall off. When the anastomosis operation is to be performed, the protection piece 16 needs to be removed; it should be understood that the external force required to remove the protection piece 16 needs to be greater than the clamping force of the clamping part 161. In other optional embodiments, the protection piece 16 can also be fixed by other forms, such as being attached to the first side of the staple cartridge 11 by adhesion, and before the anastomosis operation, the protection piece 16 can be torn off by applying an external force greater than the adhesion force.

[0105] In summary, compared with the related prior art, the staple cartridge provided in the embodiments of the present application has a tool travel groove extending in a first set direction, and the tool travel groove is configured to allow a cutting knife to pass through. When the staple cartridge is applied to a stapler, specifically, when the stapler is pressed against a tissue to be operated by a butt staple seat and the staple cartridge, the cutting knife can perform cutting operation by traveling along the tool travel groove. At the same time, a plurality of staple groove groups are distributed on both sides of the tool travel groove in the groove width direction of the tool travel groove, and the number of staple groove groups on both sides of the tool travel groove is different, so that the anastomosis firmness and the anastomosis width on both sides of the tool travel groove in the groove width direction are different, the anastomosis firmness on the side with more staple groove groups can be improved, and the differentiated anastomosis requirements of the tissue retention end and the tissue resection end can be met. Specifically, the side with more staple groove groups corresponds to the tissue retention end, and the side with fewer staple groove groups corresponds to the tissue resection end, so that the anastomosis requirements of the tissue retention end can be met, the anastomosis effect of the tissue retention end is improved, and the bleeding amount of the tissue retention end is reduced. At the same time, the problem that too many anastomosis staples of the tissue resection end lead to excessive anastomosis function and waste of anastomosis staples can be avoided. Overall, the staple cartridge of the embodiments of the present application is beneficial to improve the utilization rate of anastomosis staples, reduce the bleeding amount of the tissue retention end, and improve the anastomosis effect of the tissue retention end.

[0106] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and modified by those skilled in the art without contradiction.

[0107] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application. Industrial applicability

[0108] In summary, the present application provides a staple cartridge, a staple cartridge assembly and a stapler, which are beneficial to improve the utilization rate of anastomosis staples, reduce the bleeding amount of the tissue retention end, and improve the anastomosis effect of the tissue retention end.

Claims

1. A staple cartridge, characterized in that, The staple cartridge is formed with a knife slot (113) and a plurality of staple slot groups (114), the knife slot (113) is arranged along a first direction, the knife slot (113) is configured to pass through a cutting knife, each staple slot group (114) includes a plurality of staple slots (1141) distributed along the first direction, the staple slots (1141) are configured to install an anastomosis staple (4), a plurality of staple slot groups (114) are arranged in the slot width direction of the knife slot (113), at least one staple slot group (114) is distributed on both sides of the knife slot (113) in the slot width direction, and the number of staple slot groups (114) on both sides of the knife slot (113) in the slot width direction is different.

2. The cartridge of Claim 1, wherein, The knife slot (113) is arranged along a straight line, one end of the knife slot (113) is provided with a first opening (1131), and the first opening (1131) is configured to allow the cutting knife to enter the knife slot (113) along the first direction.

3. The cartridge of Claim 1, wherein, The plurality of staple slot groups (114) on the same side of the knife slot (113) are equidistantly distributed.

4. The cartridge of Claim 1, wherein, The staple slots (1141) of the adjacent two staple slot groups (114) on the same side of the knife slot (113) are distributed in a staggered manner.

5. The cartridge of Claim 1, wherein, The number of staple slot groups (114) on any side of the knife slot (113) in the slot width direction is greater than or equal to two.

6. The cartridge of any one of Claims 1-5, wherein, The difference between the number of staple slot groups (114) on both sides of the knife slot (113) in the slot width direction is less than or equal to two.

7. The cartridge of any one of Claims 1-5, wherein, The knife slot (113) and the staple slot (1141) penetrate the staple cartridge along a second direction, the second direction is perpendicular to the first direction and the slot width direction; the staple cartridge has opposite first and second sides in the second direction, the opening formed by the staple slot (1141) on the first side of the staple cartridge is configured to allow the front end of the anastomosis staple (4) to be ejected to protrude, the second side of the staple cartridge is provided with a plurality of pusher slots (116) extending along the first direction, the pusher slots (116) are arranged between the adjacent two staple slot groups (114) on the same side of the knife slot (113), the pusher slots (116) are in communication with the staple slots (1141) of the adjacent two staple slot groups (114) in the slot width direction, and the pusher slots (116) are configured to pass through at least part of the pusher (13) to push the anastomosis staple (4) in the staple slot (1141) to move to the first side of the staple cartridge.

8. The cartridge of Claim 7, wherein, One end of the pusher slot (116) is provided with a second opening (1161), and the second opening (1161) is configured to allow the pusher (13) to pass through along the first direction.

9. The cartridge of Claim 7, wherein, The second side of the staple cartridge is provided with a guide slot (117) extending along the first direction, and the guide slot (117) is configured to be in sliding fit with a guide portion (132) of the pusher (13).

10. A staple cartridge assembly, characterized in that, The staple cartridge comprises a pusher (13) configured to move relative to the staple cartridge to fire the anastomosis staples (4) in the staple slots (1141) of the staple cartridge.

11. The cartridge assembly of Claim 10, wherein, The walk slots (113) and the staple slots (1141) extend through the staple cartridge along a second setting direction perpendicular to the first setting direction and the slot width direction; the staple cartridge has opposite first and second sides in the second setting direction, and the openings of the staple slots (1141) formed on the first side of the staple cartridge are configured to allow the front ends of the fired anastomosis staples (4) to protrude therefrom, and the second side of the staple cartridge is provided with a plurality of pusher slots (116) extending along the first setting direction, the pusher slots (116) being arranged between adjacent two staple slot groups (114) on the same side of the walk slots (113), and the pusher slots (116) communicate with the staple slots (1141) of the adjacent two staple slot groups (114) in the slot width direction. The pusher (13) is arranged on the second side of the staple cartridge, at least partially extends into the pusher slots (116) and is movable along the pusher slots (116) to push the anastomosis staples (4) in the staple slots (1141) to move towards the first side of the staple cartridge.

12. The cartridge assembly of Claim 11, wherein, The pusher comprises a plurality of pusher plates (131) arranged at intervals in the slot width direction, and the pusher plates (131) are equal in number to the pusher slots (116) and are inserted into the pusher slots (116) one by one.

13. The cartridge assembly of Claim 12, wherein, One end of each pusher plate (131) in the first setting direction is provided with a guide surface (1311) inclined to the first setting direction and inclinedly facing the second side of the staple cartridge; the guide surface (1311) is configured to push the anastomosis staples (4) to move towards the first side of the staple cartridge when moving in the first setting direction.

14. The cartridge assembly of Claim 11, wherein, The second side of the staple cartridge is provided with a guide slot (117) extending along the first setting direction, and the pusher (13) further comprises a guide portion (132), and the guide slot (117) and the guide portion (132) of the pusher (13) are in sliding fit.

15. The cartridge assembly of Claim 11, wherein, The staple cartridge assembly further comprises a staple base (15) and an anastomosis staple (4), the staple base (15) is accommodated in the staple slots (1141) and the pusher slots (116), the staple base (15) comprises two connected sub-staple bases (151), the two sub-staple bases (151) are respectively in sliding fit with the staple slots (1141) in adjacent two staple slot groups (114) so that the staple base (15) is movable relative to the staple cartridge in the second setting direction, and one anastomosis staple (4) is arranged on one end of each sub-staple base (151) close to the first side of the staple cartridge.

16. The cartridge assembly of any one of Claims 10 to 15, wherein, The pusher (13) is configured to move relative to the cartridge in the first setting direction; the cartridge assembly further comprises an elastic limiting unit (12), the cartridge is provided with a mounting hole (111), and the elastic limiting unit (12) is mounted at the mounting hole (111); the elastic limiting unit (12) comprises an elastic force transmission structure (123) and a trigger portion (121) and a limiting portion (122) located at both ends of the elastic force transmission structure (123), the trigger portion (121) and the limiting portion (122) are respectively arranged close to the inner end and the outer end of the mounting hole (111), the trigger portion (121) is arranged in the pusher movement path of the pusher (13) in the first setting direction, and the elastic limiting unit (12) is configured to be elastically deformed when the trigger portion (121) is pushed by the pusher, so that the trigger portion (121) exits the pusher movement path; the elastic force transmission structure (123) is configured to apply an elastic driving force extending out of the outer end of the mounting hole (111) to the limiting portion (122) when the trigger portion (121) exits the pusher movement path.

17. The cartridge assembly of Claim 16, wherein, The cartridge is correspondingly provided with the trigger portion (121) at the terminal limit position of the pusher movement path of the pusher (13); And / or, the elastic limiting unit (12) is a spring sheet structure, a fixed end of the spring sheet structure is fixedly arranged at the edge of the mounting hole (111), and the elastic force transmission structure (123), the trigger portion (121) and the limiting portion (122) are all formed on the spring sheet structure.

18. The cartridge assembly of Claim 17, wherein, The spring sheet structure is bent to form a first segment (12a), a second segment (12b) and a third segment (12c) connected in sequence, the first segment (12a) forms the fixed end of the spring sheet structure and is fixedly connected with the cartridge, the second segment (12b) and the third segment (12c) are respectively arranged inclined relative to the first segment (12a), the third segment (12c) is arranged at an angle with the second segment (12b), the opening direction of the angle formed by the second segment (12b) and the third segment (12c) is consistent with the hole depth direction of the mounting hole (111), and the connecting part of the second segment (12b) and the third segment (12c) forms the trigger portion (121), and the third segment (12c) forms the elastic force transmission structure (123).

19. The cartridge assembly of Claim 17, wherein, The cartridge assembly further comprises a cartridge cover (14), the cartridge cover (14) is detachably connected with the cartridge, the cartridge cover (14) forms an accommodation space, the cartridge is arranged in the accommodation space of the cartridge cover (14), the cartridge cover (14) is provided with a through hole (141), the through hole (141) is in communication with the mounting hole (111), and the through hole (141) is configured to pass through the limiting portion (122); the inner wall of the cartridge cover (14) and the outer wall of the cartridge hold the fixed end of the spring sheet structure.

20. An anastomat characterized by The cartridge assembly comprises the cartridge assembly according to any one of claims 10 to 19. The cartridge assembly comprises the cartridge assembly according to any one of claims 10 to 19.

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