CN211409206U - Staple cartridge assembly for stapler and stapler - Google Patents

Abstract

The utility model discloses a nail storehouse subassembly and anastomat for anastomat, it relates to medical instrument technical field, a nail storehouse subassembly for anastomat includes: the nail anvil comprises a nail anvil body with a forming groove, a first side wall and a second side wall extending towards the nail cartridge frame are arranged on two sides of the end portion of the nail anvil body, the end portion of the nail cartridge frame is connected with the first side wall and the second side wall through pins, a first blocking portion extending towards the nail anvil direction is arranged on the nail cartridge frame and/or the nail cartridge, a first concave portion capable of containing the first blocking portion is arranged on the nail anvil, and the first concave portion is located on the first side wall or the second side wall and is far away from one end of the pins. The opening angle of the opening state between the nail anvil and the nail bin frame can be effectively enlarged.

Description

Staple cartridge assembly for stapler and stapler

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a nail storehouse subassembly and anastomat for anastomat.

Background

The endoscope cutting anastomat is used in endoscope and open operation, and has push broach and suturing nail to separate or anastomose tissue to replace manual suturing. In the prior art, a stapler clamps tissues by forming a fixed forming gap between a nail bin and a nail anvil, compresses the tissues in the middle to a certain thickness by driving a cutting knife to move forward, and simultaneously finishes pushing out and forming of suturing nails and cutting off of the tissues by a push-type broach.

The stapler has the defects that opposite surfaces of a nail anvil and a nail bin frame main body part in the stapler are basically designed to be parallel and level, the size of a forming gap between the nail anvil and the nail bin frame is approximately fixed under the influence of tissues, and the stapler needs to ensure that the overlapped parts of the two sides of the nail anvil and the two sides of the nail bin frame cannot generate a seam, so that the design between the nail anvil and the nail bin frame is necessarily compact, therefore, an included angle between the nail anvil and the nail bin frame in an opening state is smaller, and at present, the included angle between the nail anvil and the nail bin frame in the stapler in the opening state can only reach about 12-15 degrees.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above defects in the prior art, the embodiment of the utility model provides a technical problem that will solve provides a nail storehouse subassembly and anastomat for anastomat, and it can effectively enlarge the opening angle of the state of opening between nail anvil and the nail storehouse frame.

The embodiment of the utility model provides a concrete technical scheme is:

a staple cartridge assembly for a stapler, comprising: the nail anvil comprises a nail anvil body with a forming groove, a first side wall and a second side wall extending towards the nail cartridge frame are arranged on two sides of the end portion of the nail anvil body, the end portion of the nail cartridge frame is connected with the first side wall and the second side wall through pins, a first blocking portion extending towards the nail anvil direction is arranged on the nail cartridge frame and/or the nail cartridge, a first concave portion capable of containing the first blocking portion is arranged on the nail anvil, and the first concave portion is located on the first side wall or the second side wall and is far away from one end of the pins.

Preferably, the cartridge assembly for a stapler has at least an open condition and a closed condition, in which the first blocking portion is inserted in the first recess; in an opening state, the first blocking part is separated from the first concave part, and the lower end of the first blocking part is lower than or equal to the upper end face of the first side wall.

Preferably, the first concave part is arranged at the lower end of the inner side wall of the first side wall or the upper end surface of the anvil body or the connecting position of the anvil body and the first side wall.

Preferably, the cartridge frame and/or the staple cartridge is provided with a second blocking part extending towards the direction of the anvil, the anvil body is provided with a second concave part capable of accommodating the second blocking part, and the second concave part is positioned at one end of the first side wall or the second side wall far away from the pin; the first blocking part and the second blocking part are respectively positioned at two sides of the nail bin frame or the nail bin; in an opening state, the second blocking part is separated from the second concave part, and the lower end of the second blocking part is lower than or equal to the upper end face of the second side wall.

Preferably, the second recess is arranged at the lower end of the inner side wall of the second side wall or at the upper end surface of the anvil body or at the connecting position of the anvil body and the second side wall.

Preferably, when the cartridge component for the anastomat is in a fully opened state, the maximum included angle between the anvil and the cartridge frame reaches 20.5 degrees.

Preferably, in a closed state, the lower end surfaces of the first blocking portion and the second blocking portion are lower than the upper end surface of the anvil body.

Preferably, in an open state, an intersection point of an included angle formed between the lower end surface of the magazine rack and the upper end surfaces of the first side wall and the second side wall of the anvil is located between the first blocking portion and the pin or between the second blocking portion and the pin.

Preferably, the lower end surface of the cartridge frame is used for installing the cartridge corresponding to the forming groove, and the distance between one end of the cartridge and one end of the forming groove close to the pin and the pin is smaller than the distance between one end of the first side wall and one end of the second side wall and the pin.

A stapler comprising a cartridge assembly as claimed in any one of the preceding claims for a stapler.

The technical scheme of the utility model following beneficial effect that is showing has:

when the nail bin assembly clamps tissues, the tissues cannot enter the gap under the blocking of the first blocking part and the second blocking part, so that the problem that the edges of the tissues can be clamped into the gap is avoided. Meanwhile, the included angle between the nail bin frame and the nail anvil can be increased until the lower end of the first blocking part is equal to the upper end surface of the first side wall, and the lower end of the second blocking part is equal to the upper end surface of the second side wall, so that the included angle between the nail bin frame and the nail anvil can be effectively increased. When the nail bin assembly for the anastomat is completely opened, the maximum included angle A between the nail anvil and the nail bin frame can reach 20.5 degrees.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.

FIG. 1 is a schematic view of a prior art staple cartridge assembly;

FIG. 2 is a schematic view of a side of a magazine rack of a prior art magazine assembly for mounting a magazine;

fig. 3 is a front view of a cartridge assembly for a stapler in a closed state according to an embodiment of the present invention;

fig. 4 is a bottom view of the staple cartridge assembly for the stapler in a closed state according to an embodiment of the present invention;

FIG. 5 is a schematic view of a staple cartridge assembly for an anastomat according to an embodiment of the present invention in an opened state;

FIG. 6 is a front view of a cartridge assembly for a stapler in an open state according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a magazine frame in a staple cartridge assembly for an anastomat according to an embodiment of the present invention.

Reference numerals of the above figures:

1. a nail anvil; 11. a nail anvil body; 12. a first side wall; 13. a second side wall; 14. a first recessed portion; 15. a second recessed portion; 16. forming a groove; 2. a nail bin rack; 21. a first blocking portion; 22. a second blocking portion; 23. a staple cartridge; 3. a pin; 4. a point of intersection; 5. a through hole; 6. a first swivel mechanism; 7. and a second rotating head mechanism.

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a schematic structural view of a staple cartridge assembly in the prior art, and fig. 2 is a schematic structural view of a side of a staple cartridge rack of the staple cartridge assembly in the prior art, as shown in fig. 1 and 2, the staple cartridge assembly in the prior art comprises: the nail bin comprises a nail anvil 1 and a nail bin frame 2, wherein a first side wall 12 and a second side wall 13 extending towards the nail bin frame 2 are arranged on two sides of the end portion of the nail anvil body 11, the end portion of the nail bin frame 2 is connected with the first side wall 12 and the second side wall 13 through pins 3, and therefore the nail bin frame 2 rotates around the nail anvil 1 through the pins 3, and a certain included angle is formed between the nail anvil 1 and the nail bin frame 2.

The applicant has found that when the angle is formed between the anvil 1 and the cartridge holder 2, the end of the upper end surfaces of the first and second side walls 12, 13, which end is away from the pin 3, needs to be engaged with the lower end surface of the cartridge holder 2, so as to avoid a gap between the end of the upper end surfaces of the first and second side walls 12, 13, which end is away from the pin 3, and the lower end surface of the cartridge holder 2, and once the gap is formed, the edge of the tissue may be caught in the gap when the cartridge assembly is in the open state to clamp the tissue. If the nail bin assembly needs to be closed at this time, if the tissues clamped into the gap are less, in the forced closing process, the tissues can be cut or damaged by one end of the upper end surfaces of the first side wall 12 and the second side wall 13 far away from the pin 3 and the lower end surface of the nail bin frame 2; if the tissue clamped into the gap is thicker, the cartridge assembly cannot be closed at all, and a doctor who uses the cartridge assembly needs to operate again to clamp the tissue, so that inconvenience is brought to the user. Therefore, in the above-mentioned structure, in order to prevent a gap from occurring between the end of the upper end surface of the first side wall 12 and the second side wall 13 far away from the pin 3 and the lower end surface of the magazine rack 2, the included angle between the anvil 1 and the magazine rack 2 in the open state can only reach about 15 degrees.

Because the included angle between the nail anvil 1 and the nail bin frame 2 in the opening state is small, a doctor using the nail anvil 1 and the nail bin frame 2 under a small angle is not easy to clamp tissues between the nail anvil 1 and the nail bin 23, therefore, the opening angle between the nail anvil 1 and the nail bin frame 2 in the opening state needs to be further enlarged, and after the opening angle is enlarged, a gap must not appear between one end of the upper end surfaces of the first side wall 12 and the second side wall 13, which is far away from the pin 3, and the lower end surface of the nail bin frame 2. Meanwhile, the applicant has also found that, as shown in fig. 1, if the position of the pin 3 for connecting the end portion of the magazine holder 2 and the first and second side walls 12 and 13 is moved leftward, the opening angle of the open state between the anvil 1 and the magazine holder 2 can be enlarged without a gap between one end of the upper end surfaces of the first and second side walls 12 and 13, which is far from the pin 3, and the lower end surface of the magazine holder 2. However, the above scheme is affected by objective factors and cannot be realized.

The specific reason is that the specifications of the staples used in the current anastomats all over the world are basically uniform, the total length of the staple positions on the staple cartridge 23 is fixed, and only three specifications of 30mm, 45mm and 60mm are provided, for safety, the positions of the staples at the right end on the staple cartridge 23 must exceed the left ends of the first side wall 12 and the second side wall 13, and when the cut tissue is sutured through the staples on the staple cartridge 23, the end parts of the sutured positions must exceed the end parts of the clamped and cut tissue, so that the effectiveness of suturing is ensured, and the situation that the end parts of the cut tissue are not sutured fully and can be detached is prevented. This results in a distance of about 1 and a half staple having to be retained between the first and second sidewalls 12, 13 at the inner portion to allow the tissue cut by the knife to be completely stapled. This results in the position of the staple at the right end of the staple cartridge 23 having to exceed the left ends of the first and second side walls 12, 13, and the distance exceeding the left ends of the first and second side walls 12, 13 must be at least a distance of half a staple width, so that the position of the pin 3 cannot be further moved to the left, and the space between the first and second side walls 12, 13 of the anvil 1 has to be provided with a half staple, and a space for the knife to enter needs to be left. In summary, in the existing staple cartridge assembly, the distance between the pin 3 and the left ends of the first side wall 12 and the second side wall 13 is made to be close to the minimum, and on such a premise, the included angle between the anvil 1 and the staple cartridge frame 2 in the open state reaches about 15 degrees. Therefore, this manner of moving the position of the pin 3 for connecting the end portion of the cartridge frame 2 and the first and second side walls 12, 13 leftward cannot be realized due to the structure of the cartridge assembly itself.

To the above situation, in order to effectively enlarge the opening angle between the nail anvil 1 and the nail bin frame 2 in the open state, the applicant innovatively provides a nail bin assembly for the anastomat, fig. 3 is the embodiment of the present invention provides a front view of the nail bin assembly for the anastomat in the closed state, fig. 5 is the embodiment of the present invention provides a schematic view of the nail bin assembly for the anastomat in the open state, fig. 6 is the front view of the nail bin assembly for the anastomat in the open state, as shown in fig. 3 to fig. 6, the nail bin assembly for the anastomat may include: the nail anvil comprises a nail anvil 1 and a nail bin frame 2 with a nail bin 23, wherein the nail anvil 1 comprises a nail anvil body 11 with a forming groove 16, two sides of the end part of the nail anvil body 11 are provided with a first side wall 12 and a second side wall 13 which extend towards the nail bin frame 2, the end part of the nail bin frame 2 is connected with the first side wall 12 and the second side wall 13 through a pin 3, the nail bin frame 2 and/or the nail bin 23 is provided with a first blocking part 21 which extends towards the nail anvil 1, the nail anvil 1 is provided with a first concave part 14 which can contain the first blocking part 21, and the first concave part 14 is positioned at one end part of the first side wall 12 or the second side wall 13, which is far away from the pin 3.

The cartridge assembly for a stapler described above has at least an open state and a closed state, in which the first blocking portion 21 is inserted in the first recess 14; in the opened state, the first stopper 21 is separated from the first recess 14, and the lower end of the first stopper 21 is lower than or equal to the upper end surface of the first sidewall 12. When the cartridge component for the anastomat is completely opened, the maximum included angle A between the anvil 1 and the cartridge rack 2 can reach 20.5 degrees.

As shown in fig. 3, the anvil 1 comprises an anvil body 11 having a forming groove 16, the anvil body 11 extending substantially in a horizontal direction, and the forming groove 16 formed on an upper end surface thereof. The anvil body 11 has a first side wall 12 and a second side wall 13 extending upward toward the cartridge magazine 2 at both sides at the right end thereof, and the first side wall 12 and the second side wall 13 are disposed opposite to each other. In a closed state, the right end of the nail bin frame 2 is positioned between the first side wall 12 and the second side wall 13, and two sides of the right end of the nail bin frame 2 are respectively clung to the first side wall 12 and the second side wall 13, so that the compactness between the nail anvil 1 and the nail bin frame 2 can be improved, and the stability and the reliability of the nail bin assembly during opening and closing are improved. Through holes 5 are formed in the right end portion of the nail bin frame 2, the first side wall 12 and the second side wall 13 in the horizontal direction, pins 3 are inserted into the through holes 5, accordingly, the end portion of the nail bin frame 2 is connected with the first side wall 12 and the second side wall 13, the nail bin frame 2 can rotate around the pins 3, and therefore the nail bin assembly of the anastomat has an opening state and a closing state.

Fig. 7 is a schematic structural view of a magazine frame in a staple cartridge assembly for an anastomat according to an embodiment of the present invention, and as shown in fig. 7, the magazine frame 2 may have a first blocking portion 21 extending downward toward the anvil 1. In another possible embodiment, the cartridge 23 may have a first blocking portion 21 extending toward the anvil 1. In other possible embodiments, both cartridge rack 2 and cartridge 23 may together form a first stop 21 extending downwards in the direction towards anvil 1.

As shown in fig. 5 and 6, the anvil 1 has a first recess 14 capable of accommodating the first blocking portion 21, and when the first blocking portion 21 is accommodated in the first recess 14, the first blocking portion and the second blocking portion are located at one end of the first side wall 12 or the second side wall 13 far away from the pin 3, i.e. at the left end of the first side wall 12 or the second side wall 13. The lower end surface of the nail bin frame 2 is used for installing a nail bin 23 corresponding to the forming groove 16, and the distance between one end of the nail bin 23 and the forming groove close to the pin 3 and the pin 3 is smaller than the distance between one end of the first side wall 12 and the second side wall 13 far away from the pin 3 and the pin 3.

In a possible embodiment, the first recess 14 can be provided at the lower end of the inner side wall of the first side wall 12, at the upper end face of the anvil body 11, or at the position where the anvil body 11 is connected to the first side wall 12. The depth of the first recess 14 may be determined according to the height of the first stopper 21 extending downward. The first recess 14 may be deepest and may be a slot extending downwardly through the anvil body 11 or the first side wall 12, so that the height of the first stop 21 extending downwardly may be maximized. The larger the height of the first blocking part 21 extending downwards is, the larger the included angle between the nail anvil 1 and the nail bin frame 2 is on the premise that no gap is formed between one end of the upper end surface of the first side wall 12 and the second side wall 13 far away from the pin 3 and the lower end surface of the nail bin frame 2 when the nail bin assembly is in the open state. Of course, when the cartridge module is in the closed state, and the first blocking portion 21 is inserted into the first recessed portion 14, the lower end of the first blocking portion 21 does not exceed the lower end surface of the anvil body 11 as much as possible, otherwise, the radial maximum size of the cartridge module at this position may be increased, which is not favorable for the cartridge module to extend into the human body.

In a possible embodiment, fig. 4 is a bottom view of a cartridge assembly for a stapler in a closed state according to an embodiment of the present invention, and as shown in fig. 4 and 7, the cartridge frame 2 may have a second stop portion 22 extending toward the anvil 1. In another possible embodiment, the staple cartridge 23 can have a second stop 22 extending towards the anvil 1. In other possible embodiments, both cartridge rack 2 and cartridge 23 may together form a second stop 22 extending downwards in the direction towards anvil 1. The anvil body 11 has a second recess 15 therein which can receive the second stop 22. When the second blocking portion 22 is received in the second recess 15, both are located at an end of the first side wall 12 or the second side wall 13 remote from the pin 3. The first stopper 21 and the second stopper 22 are located on both sides of the magazine rack 2 or the magazine 23, respectively. The first 14 and second 15 recesses are located on either side of the anvil 1.

Similarly, a second recess 15 can be provided at the lower end of the inner side wall of the second side wall 13 or at the upper end surface of the anvil body 11 or at the position where the anvil body 11 is connected to the second side wall 13. The depth of the second recess 15 may be determined according to the height of the second stopper 22 extending downward. The second recess 15 may be deepest by a slot extending downwardly through the anvil body 11 or the second side wall 13, so that the height of the second stop 22 extending downwardly is maximized.

As shown in FIG. 1, the right end of the nail anvil 1 and/or the nail cartridge holder 2 may be connected with a first rotating head mechanism 6 and a second rotating head mechanism 7 which are oppositely arranged, and the first rotating head mechanism 6 and the second rotating head mechanism 7 respectively control the nail cartridge assembly to rotate left or right.

As shown in FIG. 1, when the cartridge module is in the closed state, the body portions of the anvil 1 and the cartridge magazine 2 are substantially flush with each other, and the size of the forming gap between the left ends of the anvil and the cartridge magazine is substantially fixed by the influence of the tissue. The overlapped parts of the first side wall 12 and the second side wall 13 at the two sides of the anvil 1 and the two sides of the nail bin frame 2 basically have no crack, the first blocking part 21 is inserted into the first concave part 14 to be stored, and the second blocking part 22 is inserted into the second concave part 15 to be stored, so that the compactness is ensured between the upper end surface of the right end of the anvil body 11 and the lower end surface of the right end of the nail bin frame 2.

As shown in FIGS. 5 and 6, when the cartridge module is opened, the cartridge holder 2 rotates about the pin 3, so that the first blocking portion 21 is disengaged from the first recess 14 and the second blocking portion 22 is disengaged from the second recess 15. Along with the increasing of the included angle between the magazine rack 2 and the anvil 1, the intersection point 4 of the included angle formed between the lower end surface of the magazine rack 2 and the upper end surfaces of the first side wall 12 and the second side wall 13 of the anvil 1 moves from the left end to the right end of the upper end surfaces of the first side wall 12 and the second side wall 13. In the process, as the cartridge frame 2 is provided with the first blocking part 21 and the second blocking part 22 extending towards the direction of the anvil 1, the positions of the lower ends of the first blocking part 21 and the second blocking part 22 are continuously raised, finally, the lower end of the first blocking part 21 is lower than or equal to the upper end surface of the first side wall 12, and the lower end of the second blocking part 22 is lower than or equal to the upper end surface of the second side wall 13. Thus, even if a gap is formed between the end of the upper end surface of the first side wall 12 and the second side wall 13 far away from the pin 3 and the lower end surface of the cartridge holder 2, the gap is formed where the first blocking portion 21 and the second blocking portion 22 are basically engaged with the end of the upper end surface of the first side wall 12 and the second side wall 13 far away from the pin 3, and thus a blocking effect is achieved. At this time, the intersection point 4 of the included angle formed between the lower end surface of the nail bin frame 2 and the upper end surfaces of the first side wall 12 and the second side wall 13 of the anvil 1 is positioned between the first blocking portion 21 and the pin 3 or between the second blocking portion 22 and the pin 3.

When the cartridge assembly clamps tissue, the tissue is blocked by the first blocking portion 21 and the second blocking portion 22 and cannot enter the gap, so that the problem that the edge of the tissue can be clamped into the gap is avoided. Meanwhile, the included angle between the nail bin frame 2 and the nail anvil 1 can be increased to the extent that the lower end of the first blocking portion 21 is equal to the upper end surface of the first side wall 12, and the lower end of the second blocking portion 22 is equal to the upper end surface of the second side wall 13, so that the included angle between the nail bin frame 2 and the nail anvil 1 can be effectively increased, and due to the influence of the specific specifications of the nail bin 23 and the forming groove 16 in the prior art, the thicknesses of the nail bin frame 2 and the nail anvil 1 are restricted, and must be matched with the nail bin 23 and the forming groove 16 in the prior art, so that when the nail bin assembly for the anastomat in the application is completely opened, the maximum included angle A between the nail anvil 1 and the nail bin frame 2 can reach 20.5 degrees.

There is also provided in the present application a stapler including a cartridge assembly for a stapler as claimed in any one of the above. The nail bin assembly and the anastomat in the application can enable the opening angle between the nail anvil 1 and the nail bin frame 2 to be increased under the opening state on the premise of not increasing the cost and adding any other parts, the anastomat is more convenient to use, and meanwhile the problem that the edge of tissue can be possibly clamped into a gap between one end of the upper end face of the first side wall 12 and the second side wall 13, which is far away from the pin 3, and the lower end face of the nail bin frame 2 can be avoided.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. A cartridge assembly for a stapler, comprising: the nail anvil comprises a nail anvil body with a forming groove, a first side wall and a second side wall extending towards the nail cartridge frame are arranged on two sides of the end portion of the nail anvil body, the end portion of the nail cartridge frame is connected with the first side wall and the second side wall through pins, a first blocking portion extending towards the nail anvil direction is arranged on the nail cartridge frame and/or the nail cartridge, a first concave portion capable of containing the first blocking portion is arranged on the nail anvil, and the first concave portion is located on the first side wall or the second side wall and is far away from one end of the pins.

2. The cartridge assembly for a stapler of claim 1, wherein said cartridge assembly for a stapler has at least an open state and a closed state, wherein in the closed state, said first blocking portion is inserted into said first recess; in an opening state, the first blocking part is separated from the first concave part, and the lower end of the first blocking part is lower than or equal to the upper end face of the first side wall.

3. The staple cartridge assembly for a stapler of claim 1, wherein the first recessed portion is disposed at a lower end of an inner sidewall of the first sidewall or at an upper end surface of the anvil body or at a location where the anvil body joins the first sidewall.

4. The staple cartridge assembly for a stapler of claim 2, wherein said cartridge frame and/or said staple cartridge has a second stop portion extending toward said anvil, said anvil body has a second recess portion therein configured to receive said second stop portion, said second recess portion being located at an end of said first sidewall or said second sidewall distal from said pin; the first blocking part and the second blocking part are respectively positioned at two sides of the nail bin frame or the nail bin; in an opening state, the second blocking part is separated from the second concave part, and the lower end of the second blocking part is lower than or equal to the upper end face of the second side wall.

5. The staple cartridge assembly for a stapler of claim 4, wherein the second recessed portion is disposed at a lower end of an inner sidewall of the second sidewall or at an upper end surface of the anvil body or at a connection location between the anvil body and the second sidewall.

6. The cartridge assembly for a stapler of claim 1, wherein a maximum included angle between said anvil and said cartridge frame reaches 20.5 degrees when said cartridge assembly for a stapler is in a fully open position.

7. The staple cartridge assembly for a stapler according to claim 4, wherein in the closed state, lower end surfaces of the first blocking portion and the second blocking portion are lower than an upper end surface of the anvil body.

8. The staple cartridge assembly for a stapler according to claim 4, wherein, in an open state, an intersection point at which an included angle is formed between a lower end surface of the cartridge frame and upper end surfaces of the first and second side walls of the anvil is located between the first blocking portion and the pin or between the second blocking portion and the pin.

9. The staple cartridge assembly for a stapler of claim 1, wherein said staple cartridge frame has a lower end surface for mounting said staple cartridge corresponding to said forming slot, and wherein an end of said staple cartridge and said forming slot proximate to said pin is spaced from said pin by a distance less than an end of said first sidewall and said second sidewall distal to said pin.

10. A stapler, characterized in that it comprises a cartridge assembly for a stapler according to any one of claims 1 to 9.

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