CN116650043A

CN116650043A - Nail bin assembly and medical anastomat

Info

Publication number: CN116650043A
Application number: CN202310753193.7A
Authority: CN
Inventors: 贾英伟
Original assignee: Suzhou Frankman Medical Device Technology Research Institute Co ltd
Current assignee: Suzhou Frankman Medical Device Technology Research Institute Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-08-29

Abstract

The application provides a nail bin assembly and a medical anastomat. The staple cartridge assembly comprises a shell, a pair of clamping members arranged at the far end of the shell, a push-type cutter assembly and a safety mechanism with a locking state and an unlocking state, wherein the safety mechanism comprises a main body part with elastic deformation capability, a connecting part connected with the near end of the main body part and arranged at the far end of the shell, a pressed part connected with the far end of the main body part and a blocking part connected with the main body part; when the safety mechanism is in the unlocked state, the blocking portion is biased away from the initial position and allows the push-knife assembly to move distally. The safety mechanism is arranged on the nail bin assembly, the push knife assembly is limited to move towards the far end of the nail bin assembly, the condition that the nail bin is not installed or the percussion is carried out again under the condition that the percussion nail bin is not replaced is effectively prevented, the occurrence of medical accidents or the damage to normal tissues is avoided, and the safety is high.

Description

Nail bin assembly and medical anastomat

Technical Field

The application relates to the field of medical instruments, in particular to a nail bin assembly and a medical anastomat.

Background

Endoscopic staplers are commonly used instruments in laparoscopic surgery. The head end of the endoscope anastomat is a jaw which can be opened and closed, after the jaw is closed to clamp tissues, the firing handle is buckled to push the cutting knife and the firing block to advance, and the cutting knife can push out the anastomat upwards and staple corresponding tissues while cutting the tissues.

After the operator finishes the suturing and cutting action, the endoscopic stapler needs to be reset, and then a new nail bin is replaced, so that the endoscopic stapler can perform the next suturing and cutting operation. However, in the surgical procedure, the operator may perform the next firing without replacing the already fired cartridge (i.e., the old cartridge), and after pushing out the cutter, the tissue will be severed, but there is no staple in the cartridge to stitch the tissue, which may cause serious problems such as bleeding, leakage of the contents, etc., and this risk is also present when the cartridge is not mounted, so a locking mechanism capable of differentially locking the endoscopic stapler mounted with the old cartridge and the cartridge not mounted must be used, so that the endoscopic stapler is prevented from being erroneously fired.

Disclosure of Invention

The application aims to solve the technical problem of providing a nail bin assembly with a safety mechanism and a medical anastomat, which can lock a nail bin assembly provided with an old nail bin and a nail bin which is not provided with the old nail bin.

In order to achieve the above purpose, the application adopts the following technical scheme:

a staple cartridge assembly comprising a housing;

a first clamping member disposed at a distal end of the housing;

a second clamping member rotatably disposed at the distal end of the housing and configured to cooperate with the first clamping member to clamp tissue, the second clamping member comprising a cartridge housing, a cartridge detachably disposed within the cartridge housing, and a firing block disposed at the proximal end of the cartridge and configured to move toward the distal end of the cartridge;

the push knife assembly comprises a push knife bar which is arranged in the shell and can move along the axial direction of the shell and a cutting knife which is arranged at the far end of the push knife bar;

the staple cartridge assembly further comprises a safety mechanism with a locking state and an unlocking state, wherein the safety mechanism comprises a main body part with elastic deformation capability, a connecting part connected with the proximal end of the main body part and installed at the distal end of the shell, a pressed part connected with the distal end of the main body part and a blocking part connected to the main body part, and when the safety mechanism is in the locking state, the blocking part is positioned at an initial position and blocks the push-broach assembly from moving distally; when the safety mechanism is in an unlocking state, the blocking part deviates from an initial position and allows the push knife assembly to move distally;

the proximal end of the firing block is provided with an extension part extending outwards along the axial direction of the firing block, when the second clamping member moves from the open state to the clamping state, the extension part is propped against the pressed part and drives the main body part to elastically deform so as to drive the blocking part to deviate from the initial position to the unlocking position, and the safety mechanism is switched from the locking state to the unlocking state.

Preferably, the pressure receiving portion is located between the main body portion and the cutter, and cooperates with the extending portion through a guiding inclined surface extending obliquely upward, so that the pressure receiving portion has a tendency to move radially outwards along the housing during the movement of the second clamping member from the open state to the clamping state.

In some embodiments, the compression and/or extension is provided with the guide ramp.

In some embodiments, the compression section is integrally formed with the body section.

Preferably, the main body part is located at one side of the cutter, and the main body part includes a first region to which the pressure receiving part and the blocking part are connected, a second region to which the connecting part is connected, and a bending region connected between the first region and the second region.

In some embodiments, the bending region has one or more bending bodies that are bent inward and have a substantially U-shape, and when the bending bodies have a plurality of bending bodies, the bending bodies are sequentially arranged in an up-down direction or sequentially arranged in an axial direction of the housing.

In some embodiments, the bending region has a first bending portion and a second bending portion connected to each other, the first bending portion bending outward and being connected to the second region, and the second bending portion bending inward and being connected to the first region.

Preferably, the first region and/or the second region extends in a direction substantially parallel to the axial direction of the housing.

In some embodiments, the first region and the second region are parallel but not coplanar.

In some embodiments, the body portion is machined from stainless steel sheet.

Preferably, the blocking portion is located at a distal end of the push blade assembly, and the blocking portion and a projection of the cutting blade on a first plane have an overlapping area, and the first plane is perpendicular to an axial direction of the housing.

Further, the blocking portion includes a first blocking member and a second blocking member, one end of the first blocking member is connected to the main body portion and located at the front end of the pressed portion, the second blocking member is disposed on the other end of the first blocking member, a middle portion of the first blocking member located between two ends of the first blocking member extends toward a direction close to an axis line of the housing, the second blocking member extends upward and is higher than the cutter, and when the safety mechanism is in a locked state, the second blocking member is blocked at a distal end of an upper beam of the cutter.

In some embodiments, the upper beam of the cutting knife is provided with a groove matched with the second blocking piece, and the opening of the groove faces to the second blocking piece.

In some embodiments, the body portion and the first barrier are integrally formed.

In some embodiments, a clamping groove is formed at the other end of the first blocking piece, and the second blocking piece is clamped in the clamping groove.

Further, the second blocking member is a blocking pin.

Preferably, the safety mechanism further comprises an elastic piece which is arranged at the lower end of the connecting part and has elastic deformation capability, and when the second clamping member is in a clamping state, the elastic piece is pressed against the second clamping member and enables the second clamping member to have a trend of rotating towards an open state.

It is a second object of the present application to provide a medical stapler including a cartridge assembly as described above.

Due to the application of the technical scheme, compared with the prior art, the application has the following advantages:

the application provides a nail bin assembly, which is high in safety and can effectively prevent the condition that a nail bin is not installed or the percussion is performed again under the condition that the percussion is not replaced by the nail bin by arranging a safety mechanism to limit the push-type knife assembly to move towards the far end of the nail bin assembly, so that the occurrence of medical accidents or the damage to normal tissues is avoided.

Drawings

FIG. 1 is a schematic view of a cartridge assembly in an open configuration in accordance with one embodiment of the present application;

FIG. 2 is an exploded view of the cartridge assembly of FIG. 1;

FIG. 3 is a bottom view of the cartridge assembly of FIG. 1;

FIG. 4 is a cross-sectional view taken along the A-A plane in FIG. 3;

FIG. 5 is an enlarged schematic view of portion B of FIG. 4;

FIG. 6 is a schematic view of a cartridge assembly (anvil cover not shown) in a clamped configuration in accordance with one embodiment of the present application;

FIG. 7 is a bottom view of the cartridge assembly of FIG. 6;

FIG. 8 is a cross-sectional view taken along the plane C-C of FIG. 7;

FIG. 9 is an enlarged schematic view of portion D of FIG. 8;

FIG. 10 is a schematic structural view of a safety mechanism and a cutter according to an embodiment of the present application, wherein a blocking portion of the safety mechanism is located at an initial position;

FIG. 11 is a front view of the safety mechanism and cutting blade of FIG. 10;

FIG. 12 is a top view of the safety mechanism and cutting blade of FIG. 10;

FIG. 13 is a schematic diagram of a safety mechanism and a cutter according to an embodiment of the present application, wherein a blocking portion of the safety mechanism is located at an initial position and blocks the cutter from moving distally;

FIG. 14 is a schematic view of a safety mechanism, a cutter and a firing block according to an embodiment of the present application, wherein a blocking portion of the safety mechanism is located at an unlocking position;

FIG. 15 is a schematic view of a safety mechanism (second blocking member not shown) according to an embodiment of the present application;

FIG. 16 is a schematic view of a safety mechanism (second blocking member not shown) according to a second embodiment of the present application;

FIG. 17 is a schematic view of a safety mechanism (second blocking member not shown) according to a third embodiment of the present application;

FIG. 18 is a schematic view of a safety mechanism (second blocking member not shown) according to a fourth embodiment of the present application;

FIG. 19 is a schematic view of a safety mechanism (second blocking member not shown) according to a fifth embodiment of the present application;

FIG. 20 is a schematic view of the structure of a firing block in one embodiment of the present application;

FIG. 21 is a schematic view of a cartridge assembly in a clamped state in which the cartridge has been fired in accordance with one embodiment of the present application;

FIG. 22 is a schematic view of a cartridge assembly in a clamped state in which a cartridge is not installed in one embodiment of the present application;

1, a shell;

2. a first clamping member; 21. an upper cover of the nail anvil; 22. a nail anvil; 221. a first feed slot;

3. a second clamping member; 31. a staple cartridge holder; 311. a third feed slot; 32. a staple cartridge; 321. a second feed slot; 33. a firing block; 331. an extension; 3311. a first guiding inclined surface;

4. a push knife assembly; 41. a cutter pushing rod; 42. a cutting knife; 421. an upper cross beam; 422. a cutter body; 423. a lower cross beam; 424. a groove;

5. a safety mechanism; 51. a main body portion; 511. a bending region; 5111. bending the body; 5112. a first bending part; 5113. a second bending part; 512. a first region; 513. a second region; 52. a connection part; 53. a pressure receiving portion; 531. a second guiding inclined surface; 54. a blocking portion; 541. a first blocking member; 5411. a clamping groove; 542. a second blocking member; 55. an elastic member.

Detailed Description

The application is further described below with reference to examples. The present application is not limited to the following examples. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions which are not noted are conventional conditions in the industry. The technical features of the various embodiments of the present application may be combined with each other as long as they do not collide with each other.

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that distal refers to the end of the instrument or component that is distal to the operator and proximal refers to the end of the instrument or component that is proximal to the operator; axial refers to a direction parallel to the central line of the distal and proximal ends of the instrument or component; inner and outer are positions defined relative to the distance of the center of the instrument or component, wherein inner is a position near the center of the instrument or component and outer is a position far from the center of the instrument or component; upper and lower refer to the orientation of the instrument in actual use or working condition. The above description of orientation words is merely for convenience in describing embodiments of the present application and for simplicity of description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting embodiments of the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The following disclosure provides many different implementations, or examples, for implementing different configurations of embodiments of the application. In order to simplify the disclosure of embodiments of the present application, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present application. Furthermore, embodiments of the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In this embodiment, the endoscopic stapler is taken as an example to specifically explain the medical stapler of the present application, but it should be noted that the cartridge assembly according to the following embodiments may be replaced and utilized on other types of staplers.

The medical stapler comprises an instrument platform (not shown in the drawings of the application), a handle (not shown in the drawings of the application) movably connected to the instrument platform, and a cartridge assembly detachably connected to the distal end of the instrument platform, wherein the cartridge assembly is shown in fig. 1 and 2. The instrument platform and the handle can adopt structures commonly used in the prior art, and are not described in detail in the application.

The cartridge assembly comprises a housing 1 and a pair of clamping members, a first clamping member 2 and a second clamping member 3, disposed at the distal end of the housing 1, having a clamped state (as shown in fig. 6) capable of closing relative to each other to sandwich tissue to be cut, and an open state (as shown in fig. 1) capable of opening relative to each other.

Specifically, referring to fig. 1 to 8, a first clamping member 2 is fixedly mounted at the distal end of the housing 1, and includes an anvil cover 21 and an anvil 22. The second clamping member 3 is rotatably disposed at the distal end of the housing 1 and includes a cartridge housing 31 disposed opposite the anvil 22, a cartridge 32 removably disposed within the cartridge housing 31, and a firing block 33 disposed within the cartridge 32, the cartridge 32 being configured to store staples (not shown in the present figures) for stapling and the firing block 33 being movable in an axial direction of the cartridge 32 from a proximal end of the cartridge 32 to a distal end of the cartridge 32. In an initial state, the firing block 33 is located at the proximal end of the staple cartridge 32 and has an extension 331 extending axially outward therefrom.

Further, the first feeding groove 221, the second feeding groove 321, and the third feeding groove 311 having guiding function are formed on the anvil 22, the cartridge 32, and the cartridge holder 31, respectively, and the first feeding groove 221, the second feeding groove 321, and the third feeding groove 311 extend along the axial direction of the anvil 22, the cartridge 32, and the cartridge holder 31, respectively.

The cartridge assembly further comprises a push knife assembly 4, the push knife assembly 4 comprising a push knife bar 41 and a cutting knife 42, the push knife bar 41 being disposed within the housing 1 and axially movable along the housing 1, the push knife bar 41 being operatively connected to an actuation source such as a handle of a medical stapler; the cutter 42 is fixedly connected or formed at the distal end of the push rod 41, and the cutter 42 can push the firing block 33 to move distally under the action of the push rod 41 so as to push the staples out of the staple cartridge 32 in sequence, thereby stapling the tissue under the cooperation of the anvil 22.

Further, the cutter 42 includes an upper beam 421, a cutter body 422, and a lower beam 423, which are sequentially disposed from top to bottom, and a cutter blade for cutting tissue is fixedly disposed or formed on the cutter body 422. The upper beam 421 is matched with the surface of the anvil 22 opposite to the surface of the anvil 22, the lower beam 423 is matched with the surface of the cartridge seat 31 far away from the anvil 22, and the lower beam 423 drives the cartridge seat 31 to rotate in the process that the cutting knife 42 is driven by the pushing knife bar 41 to move distally, so that the cartridge assembly is closed to clamp target tissues. When the cartridge assembly is in the closed state, the push cutter assembly 4 is movable in the axial direction of the housing 1 in the first feed groove 221, the second feed groove 321, and the third feed groove 311.

The cartridge assembly further comprises a safety mechanism 5 having a locked state and an unlocked state. Referring to fig. 9 to 19, the safety mechanism 5 includes a main body portion 51, and a connection portion 52, a pressure receiving portion 53, and a blocking portion 54, which are connected to the main body portion 51, respectively. Wherein the connecting portion 52 is located at the proximal end of the main body portion 51 and is mounted at the distal end of the housing 1, the pressure receiving portion 53 is located at the distal end of the main body portion 51, and the main body portion 51 has elastic deformability. When the safety mechanism 5 is in the locked state, the blocking portion 54 is located at the initial position and blocks the distal movement of the push blade assembly 4; when the safety mechanism 5 is in the unlocked state, the blocking portion 54 is deviated from the initial position and allows the push blade assembly 4 to move distally. When the second clamping member 3 moves from the open state to the clamping state, the extension portion 331 of the firing block 33 abuts against the pressed portion 53 and drives the main body portion 51 to elastically deform so as to drive the blocking portion 54 to deviate from the initial position to the unlocked position, so that the safety mechanism 5 is switched from the locked state to the unlocked state.

Since the firing block 33 within the fired cartridge 32 (i.e., the old cartridge 32) has moved to the distal end of the cartridge 32, the compression portion 53 is not compressed when the second clamping member 3 with the old cartridge 32 mounted thereto is in the clamped state, and thus the blocking portion 54 remains in the initial position (as shown in fig. 10 and 13), thereby impeding distal movement of the push broach assembly 4. Similarly, when the second clamping member 3, to which the staple cartridge 32 is not attached, is in a clamped state, the pressed portion 53 is not pressed due to the absence of the firing block 33. Therefore, the old nail bin 32 and the nail bin components which are not provided with the nail bin 32 can be locked, medical accidents such as operation failure and the like caused by misoperation are avoided, and clinical risks are reduced.

Specifically, the pressed portion 53 is located between the main body portion 51 and the cutter 42, and the pressed portion 53 cooperates with the extending portion 331 by a guide slope extending obliquely upward, so that the pressed portion 53 has a tendency to move outward in the radial direction of the housing 1 during the movement of the second holding member 3 from the open state to the held state.

Further, the pressed portion 53 and/or the extension portion 331 are provided with guide slopes. In the present embodiment, referring to fig. 20, the upper portion of the extension portion 331 is provided with a first guide slope 3311, referring to fig. 15 to 19, the pressure receiving portion 53 is provided with a second guide slope 531, and the pressure receiving portion 53 is pressed by the extension portion 331 to have a tendency to move outward in the radial direction of the housing 1 in the process of moving the second holding member 3 from the open state to the held state by the cooperation of the first guide slope 3311 and the second guide slope 531.

Preferably, the pressure receiving portion 53 is integrally formed with the main body portion 51. Further, the pressure receiving portion 53 may be formed by bending a first sheet-like structural member integrally formed with the main body portion 51 by sheet metal. Still further, the free end of the sheet-like structure is bent toward the main body portion 51 and preferably contacts the main body portion 51.

The main body 51 is located on one side of the cutter 42, and the main body 51 includes a first region 512 to which the pressure receiving portion 53 and the blocking portion 54 are connected, a second region 513 to which the connecting portion 52 is connected, and a bending region 511 connected between the first region 512 and the second region 513. By providing the bending region 511, the body portion 51 is prevented from plastic deformation which cannot be recovered.

In some embodiments, the bending region 511 has a bending body 5111 that is bent inward and has a substantially U-shape, and the bending body 5111 has one (see fig. 15) or a plurality (see fig. 16 to 18), and when the bending body 5111 has a plurality of bending bodies 5111, the bending bodies 5111 are sequentially arranged in the up-down direction (see fig. 16 and 17 in particular, with a gap between the bending bodies 5111) or are sequentially arranged in the axial direction of the housing (see fig. 18 in particular). In other embodiments, referring to fig. 19, the bending region 511 has a first bending portion 5112 and a second bending portion 5113 connected, the first bending portion 5112 is bent outward and connected to the second region 513, and the second bending portion 5113 is bent inward and connected to the first region 512 such that the first region 512 and the second region 513 are not coplanar.

Further, the extending direction of the first region 512 and/or the second region 513 is substantially parallel to the axial direction of the housing 1. In the present embodiment, the first region 512 and the second region 513 are parallel to each other and extend in directions parallel to the axial direction of the housing 1, respectively.

Further, the main body 51 is formed by processing a stainless steel sheet, specifically by bending a sheet metal. The stainless steel main body 51 has high strength, is not easily deformed in plasticity, and can be automatically recovered. Of course, other materials satisfying the conditions, such as metal and plastic, are also applicable.

The blocking portion 54 is located at the distal end of the push broach assembly 4, and the blocking portion 54 has an overlapping area with the projection of the cutting blade 42 on a first plane, which is perpendicular to the axial direction of the housing 1, such that the push broach assembly 4 is blocked from moving distally.

Specifically, the blocking portion 54 includes a first blocking member 541 and a second blocking member 542. One end of the first blocking member 541 is connected to the main body 51 and located at the front end of the pressure receiving portion 53, and a second blocking member 542 is provided at the other end thereof, and a middle portion of the first blocking member 541 located between both ends thereof extends toward a direction close to the axis of the housing 1, the second blocking member 542 extends upward and is higher than the cutter 42, and the second blocking member 542 is caught at the distal end of the upper beam 421 of the cutter 42. More specifically, the upper beam 421 of the cutter 42 has a recess 424 thereon that mates with the second blocking member 542, the recess 424 being located at the distal end of the upper beam 421 and opening toward the second blocking member 542. When the safety mechanism 5 is in the locked state and the cutting blade 42 is moved distally, the upper beam 421 of the cutting blade 42 is blocked by the second blocking member 542, and the second blocking member 542 enters the recess 424, preventing the cutting blade 42 from continuing to move distally. When the safety mechanism 5 is in the unlocked state, the cutter 42 can be moved distally due to the avoidance of the cutter 42 by the second blocking member 542 being offset from the initial position.

Further, a first blocking member 541 is located at an upper portion of the distal end of the main body portion 51, the first blocking member 541 being integrally formed with the main body portion 51. For example, the first stopper 541 may be formed by bending a second sheet-like structural member integrally formed with the main body 51 by sheet metal. Further, the free end of the first blocking member 541 is bent toward the main body portion 51 and forms a locking groove 5411, and the second blocking member 542 is locked in the locking groove 5411.

Preferably, the second blocking member 542 is a blocking pin.

The connecting portion 52 is connected to one side surface of the main body 51, preferably the side surface adjacent to the cutter 42. Preferably, the connecting portion 52 is integrally formed with the main body 51, and may be, for example, a third sheet-like structural member integrally formed with the main body 51, which is bent by sheet metal.

The safety mechanism 5 further includes an elastic piece 55 provided at the lower end of the connecting portion 52 and having elastic deformability, and when the second clamping member 3 is in the clamped state, the elastic piece 55 is pressed against the second clamping member 3, so that the second clamping member 3 has a tendency to rotate toward the open state. The safety mechanism 5 integrates an opening spring structure at the same time, has a simple structure and is easy to process.

Specifically, the elastic member 55 extends obliquely downward. When the second clamping member 3 is in the clamped state, the distal end of the spring 55 abuts against the inner surface of the cartridge seat 31. The elastic member 55 is preferably integrally formed with the main body 51, and may be, for example, a fourth sheet-like structure integrally formed with the main body 51, which is bent by sheet metal.

Working principle:

the nail bin 32 is installed, the second clamping member 3 is enabled to rotate upwards until the second clamping member rotates to a clamping state by the operating handle, in the process, as the firing block 33 is located at the proximal end of the nail bin 32, through the cooperation of the guide inclined surface, the extending part 331 of the firing block 33 moves upwards to squeeze the pressed part 53, so that the pressed part 53 has a trend of moving outwards along the radial direction of the shell 1, the main body part 51 is enabled to elastically deform and move outwards, the blocking part 54 is driven by the main body part 51 to move outwards together, the initial position is deviated to the unlocking position, the blocking part 54 is formed to avoid the cutting knife 42, and the cutter pushing rod 41 can continuously push the cutting knife 42 and the firing block 33 to move distally through the firing handle.

When the cutting and suturing are completed, the push knife assembly 4 and the safety mechanism 5 are reset, but under the condition that a new staple cartridge 32 (shown in fig. 21) is not replaced or the staple cartridge 32 is not installed (shown in fig. 22), if the staple cartridge assembly is fired again, the push knife bar 41 drives the cutting knife 42 to move towards the distal end of the staple cartridge 32, and at the moment, the blocking part 54 of the reset safety mechanism 5 is blocked on the distal end of the upper beam 421 of the cutting knife 42, so that the push knife assembly 4 is prevented from moving towards the distal end continuously, and the effect of preventing misoperation is achieved.

The present application has been described in detail with the purpose of enabling those skilled in the art to understand the contents of the present application and to implement the same, but not to limit the scope of the present application, and all equivalent changes or modifications made according to the spirit of the present application should be included in the scope of the present application.

Claims

1. A staple cartridge assembly comprising a housing;

a first clamping member disposed at a distal end of the housing;

the method is characterized in that:

2. The staple cartridge assembly of claim 1, wherein: the compression part is positioned between the main body part and the cutting knife, and is matched with the extending part through a guide inclined plane extending upwards in an inclined way, so that the compression part has a trend of outwards moving along the radial direction of the shell in the process of moving the second clamping member from the open state to the clamping state.

3. The staple cartridge assembly of claim 2, wherein: the compression part and/or the extension part is/are provided with the guide inclined plane; and/or the number of the groups of groups,

the compression part and the main body part are integrally formed.

4. The staple cartridge assembly of claim 1, wherein: the main body part is located one side of the cutting knife, and comprises a first area connected with the pressed part and the blocking part, a second area connected with the connecting part and a bending area connected between the first area and the second area.

5. The staple cartridge assembly of claim 4 wherein said bending zone has one or more inwardly bent and generally U-shaped bending bodies arranged in sequence in an up-down direction or in sequence in an axial direction of said housing when said bending bodies are plural; or the bending region is provided with a first bending part and a second bending part which are connected, the first bending part is bent outwards and connected with the second region, and the second bending part is bent inwards and connected with the first region; and/or the number of the groups of groups,

the extending direction of the first area and/or the second area is approximately parallel to the axial direction of the shell; and/or the number of the groups of groups,

the main body part is formed by processing stainless steel sheets.

6. The staple cartridge assembly of claim 1, wherein: the blocking part is positioned at the far end of the push knife assembly, and the projection of the blocking part and the cutting knife on a first plane is provided with an overlapping area, and the first plane is perpendicular to the axial direction of the shell.

7. The staple cartridge assembly of claim 6, wherein: the blocking part comprises a first blocking part and a second blocking part, one end of the first blocking part is connected with the main body part and is positioned at the front end of the pressed part, the second blocking part is arranged on the other end of the first blocking part, the middle part of the first blocking part between the two ends of the first blocking part extends towards the direction close to the axial lead of the shell, the second blocking part extends upwards and is higher than the cutting knife, and when the safety mechanism is in a locking state, the second blocking part is blocked at the far end of the upper beam of the cutting knife.

8. The staple cartridge assembly of claim 7, wherein: the upper cross beam distal end part of the cutting knife is separately provided with a groove matched with the second blocking piece, and the opening of the groove faces the second blocking piece; and/or the number of the groups of groups,

the main body part and the first blocking piece are integrally formed; and/or the number of the groups of groups,

the second blocking piece is a blocking pin; and/or the number of the groups of groups,

the other end of the first blocking piece is provided with a clamping groove, and the second blocking piece is clamped in the clamping groove.

9. The staple cartridge assembly of claim 1, wherein: the safety mechanism further comprises an elastic piece which is arranged at the lower end of the connecting part and has elastic deformation capability, and when the second clamping member is in a clamping state, the elastic piece is propped against the second clamping member and enables the second clamping member to have a trend of rotating towards an opening state.

10. A medical stapler, characterized in that: comprising the cartridge assembly of any one of claims 1 to 9.