CN115886914A - Nail bin assembly and medical anastomat - Google Patents

Abstract

The invention provides a nail bin assembly and a medical anastomat. The nail bin assembly comprises a shell, a nail anvil, a nail bin frame, a nail bin, a push knife assembly and a safety mechanism, wherein the safety mechanism comprises a mounting area, an elastic deformation area, a driving area and a stopping area, the elastic deformation area can elastically deform, and the safety mechanism is in a locking state and an unlocking state. The invention avoids the situation that the percussion is carried out again under the condition that the nail bin is not installed or the percussion nail bin is not replaced by the safety mechanism. The safety mechanism has a simple structure, is easy for industrial production, and greatly reduces the production cost. Meanwhile, the nail bin assembly is high in applicability and applicable to anastomats of different models.

Description

Nail bin assembly and medical anastomat

Technical Field

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

Background

Endoscopic staplers are a common instrument used in laparoscopic surgery. The end of the endoscope anastomat is provided with a jaw which can be opened and closed, after the jaw is closed and clamped with tissues, a trigger handle is buckled to push a cutting knife and a trigger block to advance, and when the cutting knife cuts the tissues, the trigger block pushes out anastomotic nails upwards and staples corresponding tissues. The nail bin can be detached after the endoscope anastomat is fired, and a new nail bin is replaced for continuous use.

However, in the surgical process, there may occur a serious problem that when an operator does not replace a fired staple cartridge or pushes out a cutting knife without installing the staple cartridge, the tissue will be cut off at this time, but the staple cartridge does not have staples to suture the tissue, so bleeding, content leakage and the like may be caused.

Therefore, in the prior art, by arranging the safety mechanism, when the nail bin is not installed or the shot nail bin is not replaced, the cutting knife cannot be pushed forward, so that the occurrence of medical accidents is avoided.

For example, CN213489060U discloses a nail cartridge assembly and a medical stapler having the same, wherein a limit portion is disposed at a proximal end of a clamp, a safety portion is disposed on a cutter body, when a trigger block is located at a proximal end of the nail cartridge assembly, a push rod drives a cutter and the trigger block to move together to a distal end of the nail cartridge assembly, and when the trigger block is located at a distal end of the nail cartridge assembly, the push rod drives the cutter to move to the distal end of the nail cartridge assembly until the limit portion and the safety portion abut against each other to limit the cutter to continue to move to the distal end of the nail cartridge assembly, thereby preventing misoperation of a doctor. However, the safety part of the patent is matched with the triggering block through an inclined plane, when the nail bin is installed on the nail bin frame, the triggering block is installed on the advancing path of the cutter, when the nail bin assembly is closed, the cutter is driven by the push knife rod to move towards the far end of the nail bin assembly, and the safety part of the cutter is gradually close to the safety contact part of the triggering block; therefore, under the interaction of the two inclined surfaces, the cutter generates a component force towards the far end to the firing block, so that the firing block is possibly pushed towards the far end, the risk that the anastomosis nail is pushed out in advance is caused, the safety part cannot be normally unlocked, and the anastomat cannot be fired.

Disclosure of Invention

The invention aims to solve the technical problem of providing a nail bin assembly with different safety mechanism structures and a medical anastomat.

In order to achieve the purpose, the invention adopts the technical scheme that:

it is a first object of the present invention to provide a staple cartridge assembly comprising:

a housing;

the nail anvil is fixedly arranged at the far end of the shell;

the nail bin frame is rotatably arranged at the far end of the shell and can be matched with the nail anvil to clamp tissues;

the nail bin is detachably arranged in the nail bin frame and comprises a nail bin body and a firing block capable of moving in the nail bin body;

the push broach assembly is arranged in the shell and can move along the axial direction of the shell, and a blocking part is arranged on the push broach assembly;

the safety mechanism comprises an installation area positioned at the far end, an elastic deformation area positioned at the near end of the installation area and capable of elastically deforming, a driving area positioned at the near end of the installation area, and a stopping area positioned at the near end and capable of being matched with the blocking part; the mounting area is fixedly connected with the nail anvil; the safety mechanism is provided with a locking state and an unlocking state, when the safety mechanism is in the locking state, the stopping area is matched with the blocking part to prevent the push broach assembly from moving towards the far end, and the extending direction of the driving area is consistent with the moving direction of the push broach assembly; when the safety mechanism is in an unlocking state, the stopping area is separated from the blocking part, and the push broach assembly can drive the firing block to move towards the far end together;

when the triggering block is positioned at the near end of the nail bin body, the push broach assembly moves towards the far end to drive the nail bin frame to rotate so as to be matched with the nail anvil, the triggering block is matched with the driving area, and the elastic deformation area deforms, so that the safety mechanism is converted from a locking state to an unlocking state.

Preferably, the mounting region and the anvil are fixedly connected by welding or gluing.

Preferably, the surface of the firing block matched with the driving area is a plane, and the extending direction of the plane is consistent with the extending direction of the nail bin body.

Preferably, a sliding groove for moving the stopping area is formed on the push broach assembly, and the blocking portion is a side wall of a proximal end of the sliding groove.

Preferably, the distal end of the elastic deformation area is fixedly connected with or integrally arranged with the proximal end of the mounting area, and the proximal end is fixedly connected with or integrally arranged with the distal end of the driving area.

Preferably, the elastically deformable region extends obliquely from the distal end to the proximal end towards the interior of the cartridge assembly.

Preferably, a groove is formed on one of the nail box body and the firing block, and a convex part capable of being matched with the groove is formed on the other one of the nail box body and the firing block.

Preferably, the stopping area is rod-shaped and extends along the left and right direction of the nail cartridge assembly, a matching part protruding upwards is formed on the housing, and when the safety mechanism is in the locking state, the blocking part and the matching part are respectively located at the near end and the far end of the stopping area and are in contact with the stopping area.

Further preferably, the engaging portions are formed on left and right sides of the housing, respectively.

Further preferably, the part of the securing mechanism that is connected to the stop region is located outside the fitting.

Preferably, the safety mechanism further comprises a buffer zone disposed between the drive zone and the stop zone, the buffer zone being curved.

According to some specific and preferred embodiments, the safety mechanism is formed by bending an elastic steel wire.

According to other specific and preferred embodiments, the driving area is formed by a plastic part, and the other part of the safety mechanism is formed by bending an elastic steel wire, and the plastic part is fixedly connected with the elastic steel wire.

Preferably, the safety mechanism is in a bilaterally symmetrical structure and is internally provided with a channel through which the push broach assembly can pass.

The second purpose of the invention is to provide a medical anastomat which comprises the nail bin assembly.

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

the invention provides a nail bin assembly with different safety mechanisms, and the safety mechanism is arranged, so that the situation that the nail bin is not installed or the struck nail bin is not replaced and the nail bin is struck again is avoided. The safety mechanism has a simple structure, is easy for industrial production, and greatly reduces the production cost. Meanwhile, the nail bin assembly is high in applicability and applicable to anastomats of different models.

Drawings

FIG. 1 is a front view of an embodiment of a staple cartridge assembly in an open state;

FIG. 2 is a perspective view of the staple cartridge assembly of an embodiment in a clamped closed state;

FIG. 3 is a schematic diagram of a safety mechanism according to one embodiment;

FIG. 4 is a side view of the structure of one embodiment safety mechanism;

FIG. 5 is a schematic view of one embodiment of a safety mechanism engaged with a push-broach assembly;

FIG. 6 is a schematic view of one embodiment of a firing block, safety mechanism, and push-knife assembly in combination;

FIG. 7 is a perspective view of an embodiment of a staple cartridge assembly in an open condition and partially in section (the firing block is not located at the proximal end of the staple cartridge body);

FIG. 8 is a front view, partially in section, of an embodiment of a staple cartridge assembly in an open condition (the firing block is not located at the proximal end of the staple cartridge body);

FIG. 9 is a perspective view of the cartridge assembly of an embodiment in a clamped closed position and partially in section (the firing block is not located at the proximal end of the cartridge body);

FIG. 10 is a front view, partially in section, of the cartridge assembly of an embodiment in a clamped closed state (the firing block is not located at the proximal end of the cartridge body);

FIG. 11 is a top view, partially in section, of an embodiment of a staple cartridge assembly in a clamped, closed position (the firing block is not located at the proximal end of the staple cartridge body);

FIG. 12 is a perspective view of an embodiment of a staple cartridge assembly in an open condition and partially in section (with the firing block located at the proximal end of the staple cartridge body);

FIG. 13 is a front view, partially in section, of the cartridge assembly of an embodiment in an open condition (the firing block is located at the proximal end of the cartridge body);

FIG. 14 is a perspective view of the cartridge assembly of an embodiment in a clamped closed position and partially in section (with the firing block located at the proximal end of the cartridge body);

FIG. 15 is a front view, partially in section, of the cartridge assembly of an embodiment in a clamped closed position (firing block located at the proximal end of the cartridge body);

FIG. 16 is a perspective view of the firing block;

FIG. 17 is a perspective view of the cartridge body;

FIG. 18 is a top view of the firing block at the proximal end of the staple cartridge body;

FIG. 19 is a schematic view of another embodiment safety mechanism;

FIG. 20 is a side view of the structure of another embodiment safety mechanism;

wherein, 1, a shell; 11. a fitting portion;

2. a nail anvil;

3. a nail bin rack;

4. a staple cartridge; 41. a nail bin body; 411. a convex portion; 412. an avoidance groove; 42. a percussion block; 421. a groove;

5. a push-broach assembly; 51. pushing a cutter rod; 521. a first cross member; 522. a second cross member; 523. a cutter body; 53. a chute; 531. a blocking portion;

6. a safety mechanism; 61. an installation area; 62. an elastic deformation region; 63. a drive region; 64. a stop zone; 65. a buffer area; 66. a channel.

Detailed Description

The present invention will be further described with reference to the following examples. However, the present invention 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 not mentioned are conventional conditions in the industry. The technical features according to the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that distal refers to the end of the instrument or component that is distal from 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 center line connecting the distal end and the proximal end of the instrument or component; inner and outer are positions defined by distance relative to the center of the instrument or component, where inner is a position near the center of the instrument or component and outer is a position away from the center of the instrument or component; the upper and lower fingers are the orientation of the instrument in actual use or operation. The foregoing directional terms are used merely to facilitate description of the embodiments and to simplify description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the embodiments.

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

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. To simplify the disclosure of embodiments of the invention, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit embodiments of the present invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

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

In the present embodiment, the medical stapler of the present invention is specifically explained by taking a cavity mirror stapler as an example, but it should be noted that the technical spirit involved in the embodiments described below may be alternatively utilized to other types of staplers.

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

As shown in fig. 1 to 15, the cartridge assembly comprises a housing 1, an anvil 2 fixedly mounted at a distal end of the housing 1, a cartridge rack 3 rotatably mounted at a distal end of the housing 1, a cartridge 4 detachably mounted in the cartridge rack 3, a knife pushing assembly 5 mounted in the housing 1 and capable of moving along an axial direction of the housing 1, and a safety mechanism 6 fixedly connected to a proximal end of the anvil 2, wherein the cartridge rack 3 is capable of cooperating with the anvil 2 to clamp tissue. The cartridge assembly has an open state as shown in FIG. 1 and a closed state as shown in FIG. 2.

Specifically, as shown in fig. 5 and 6, the push-knife assembly 5 includes a push-knife rod 51 and a cutting knife, the cutting knife is fixedly connected to or formed at a distal end of the push-knife rod 51, and the cutting knife can push the firing block 42 to move towards the distal end under the action of the push-knife rod 51 to sequentially push the staples out of the staple cartridge 4, so as to staple the tissue under the cooperation of the anvil 2.

As shown in fig. 5 and 6, the cutting knife includes a first beam 521, a second beam 522 and a cutting knife body 523 between the first beam 521 and the second beam 522, which are oppositely disposed, and a cutting blade for cutting tissue is fixedly disposed or formed on the cutting knife body 523. As shown in fig. 7, the first beam 521 is engaged with the surface of the anvil 2 opposite to the anvil surface, and the second beam 522 is engaged with the surface of the cartridge rack 3 away from the anvil 2, so that during the closing process of the cartridge component, the cutter moves towards the far end under the action of the cutter bar 51, the second beam 522 drives the cartridge rack 3 to rotate, so that the cartridge component is closed to clamp the target tissue.

And when the nail bin assembly is in a closed state, the first cutter feeding groove, the second cutter feeding groove and the third cutter feeding groove extend along the axial direction of the shell 1 to allow the push broach assembly 5 to move.

As shown in fig. 7, the cartridge 4 is used for accommodating staples and comprises a cartridge body 41, and a plurality of staple holes are arranged on the anvil surface of the cartridge body 41 close to the anvil 2 for passing the staples when stapling tissue. As shown in fig. 12, the cartridge 4 further comprises a firing block 42, the firing block 42 is located within the cartridge body 41 and is configured to move within the cartridge body 41 in a distal-proximal direction under the urging of the pusher assembly 5 to fire the staples.

As shown in fig. 3 to 15, an embodiment of the safety mechanism 6 is provided, wherein the safety mechanism 6 has a left-right symmetrical structure, and includes a mounting region 61 located at a distal end, an elastic deformation region 62 located at a proximal end of the mounting region 61 and capable of elastic deformation, a driving region 63 located at a proximal end of the mounting region 61, a stopping region 64 located at a proximal end and capable of cooperating with a stopping portion 531 on the push-broach assembly 5, and a channel 66 through which the push-broach assembly 5 can pass. The safety mechanism 6 has a locked state and an unlocked state, when the firing block 42 in the staple cartridge 4 has been fired (i.e. the staple cartridge 4 is an old staple cartridge) or the staple cartridge 4 is not mounted in the staple cartridge frame 3, since no firing block 42 generates an acting force on the driving area 63 of the safety mechanism 6 to deform the elastic deformation area 62 and further move the stopping area 64 upward in the process of switching the staple cartridge assembly from the open state to the closed state, the safety mechanism 6 is in the locked state; when the nail bin 4 is a new nail bin and is installed in the nail bin frame 3, in the process of converting the nail bin assembly from the open state to the closed state, the firing block 42 is positioned below the driving area 63 and can push the driving area 63 upwards, so that the elastic deformation area 62 deforms, the stopping area 64 moves upwards to be separated from the stopping part 531, the safety mechanism 6 is in the unlocking state, and at the moment, the push knife assembly 5 can move towards the far end to push the firing block 42 to move towards the far end, so that the suturing and cutting of tissues are completed.

Specifically, the mounting region 61 is fixedly connected to the lower surface of the anvil 2, preferably by welding, and the proximal end of the mounting region 61 is fixedly connected to or integrally disposed with the distal end of the elastic deformation region 62.

The elastic deformation region 62 extends obliquely from the distal end to the proximal end towards the inside of the cartridge assembly, and the distal end of the driving region 63 is fixedly connected to or integrally arranged with the proximal end of the elastic deformation region 62. The safety mechanism 6 further comprises a buffer zone 65, and a distal end of the buffer zone 65 is fixedly connected to or integrated with the driving zone 63. In the present embodiment, the buffer zone 65 is partially curved, and since there is a gap between the stopping zone 64 and the fitting part 11 (described in detail below) in the initial state, and in the case that there is no firing block 42 at the proximal end of the cartridge body 41, when the push-knife assembly 5 moves to the distal end until the stopping part 531 abuts against the stopping zone 64, the safety mechanism 6 receives a thrust force along the axial direction, and the buffer zone 65 can absorb the thrust force to make the stopping zone 64 smoothly contact with the fitting part 11 without damaging the safety mechanism 6. The proximal end of the buffer area 65 is fixedly connected or integrally arranged with the stop area 64, the stop area 64 is rod-shaped and extends along the left-right direction of the cartridge component, and the portion of the safety mechanism 6 connected with the stop area 64 (i.e. the portion of the buffer area 65) is located outside the matching portion 11 on the housing 1.

As shown in FIGS. 5 and 6, a slide channel 53 is also formed on the distal end of the pusher bar 51 of the pusher assembly 5 to allow for movement of a stop region 64 during distal movement of the pusher assembly 5 to transition the cartridge assembly from the open condition to the closed condition. The length of the chute 53 is greater than or equal to the distance of the pusher bar 51 moving along the distal direction when the magazine rack 3 and the anvil 2 are turned from the open state to the closed state. Preferably, the distal side wall of the slot 53 is radiused to accommodate the stop region 64 of the safety mechanism 6 in the initial state of the cutter. The push broach assembly 5 is further provided with the stop portion 531, and the stop portion 531 is a proximal side wall of the sliding slot 53.

Preferably, as shown in fig. 9, the housing 1 is formed with an upwardly protruding engaging portion 11, when the safety mechanism 6 is in the locked state, the blocking portion 531 and the engaging portion 11 formed on the housing 1 are respectively located at the proximal end and the distal end of the stopping area 64 and are in contact with the stopping area 64, the blocking portion 531 is engaged with the engaging portion 11, the stopping area 64 can be better retained between the blocking portion 531 and the engaging portion 11 to prevent the push-type broach assembly 5 from further moving to the distal end, and the deformation of the stopping area 64 pushed by the push-type broach rod 51 in the locked state can be better avoided. More preferably, as shown in fig. 9, 11 and 14, the housing 1 is formed with one engaging portion 11 on each of the left and right sides thereof, and the blocking portion 531 is located on the symmetry axis of the two engaging portions 11, so that when the safety mechanism 6 is in the locked state, the two engaging portions 11 and the blocking portion 531 are in contact with the stopper region 64 through three points, respectively, thereby further improving the stability of the locking and further avoiding the occurrence of deformation of the stopper region 64. Further, the housing 1 includes a body having an inner cavity, lower fixing blocks fixedly disposed at front and rear sides in the body, and the fitting portions 11 are respectively formed on upper surfaces of the lower fixing blocks and upwardly and convexly extend.

As shown in fig. 14 and 15, the safety mechanism 6 is in the unlocked state, at this time, the firing block 42 and the driving region 63 are engaged through the avoiding groove 412 on the cartridge body 41, and under the acting force of the firing block 42, the elastic deformation region 62 is deformed to drive the stopping region 64 to move upwards until the stopping region 64 is separated from the blocking portion 531, so that the push-out broach assembly 5 can further move distally.

Specifically, as shown in fig. 17 and 18, a left-right symmetrical avoiding groove 412 is formed on a surface of the proximal end side of the cartridge body 41 close to the anvil surface of the anvil 2, and during the closing process of the cartridge assembly or in the closed state, the driving area 63 enters the avoiding groove 412 and is further subjected to an upward thrust of the firing block 42, so that the elastic deformation area 62 is deformed, and the safety mechanism 6 is changed from the locked state to the unlocked state. Preferably, the proximal end of the bypass groove 412 is open.

The surface of the firing block 42 and the driving area 63, which are matched with each other, is a plane, and the extending direction of the plane is consistent with the extending direction of the nail bin body 41. When the safety mechanism 6 is in the locked state, the extending direction of the driving section 63 coincides with the axial line direction of the housing 1. Also, the firing block 42 is located below the drive zone 63 when the cartridge assembly is in the open state. When the push broach assembly 5 drives the magazine frame 3 to rotate so as to close the magazine assembly, the firing block 42 is in contact with the driving area 63, the firing block 42 generates upward and slightly proximal force to the driving area 63, therefore, the driving area 63 generates reaction force to the firing block 42 downward and slightly distal, therefore, the component force of the reaction force towards the distal end is weaker, compared with the interaction of two inclined planes in the prior art, the cutter can generate larger component force towards the distal end to the firing block, and the risk that the firing block is pushed to the distal end so that the suturing nail is pushed out in advance is greatly reduced.

In order to further reduce the risk that the firing block 42 is pushed out in advance, a groove 421 is formed on one of the cartridge body 41 and the firing block 42, and a protrusion 411 capable of being matched with the groove 421 is formed on the other of the cartridge body 41 and the firing block 42, in the present embodiment, as shown in fig. 16, the groove 421 is formed on the firing block 42, and as shown in fig. 17, the protrusion 411 is formed on the cartridge body 41.

When the nail bin 4 is installed on the nail bin frame 3, the cutter is located at the initial position of the near end of the nail bin frame 3, the firing block 42 is located at the near end of the nail bin body 41, and the nail bin frame 3 and the nail anvil 2 are in an opening state, as shown in fig. 12 to 13. When the knife is driven by the knife pushing rod 51, the knife pushing assembly 5 moves from the initial position to the distal end, and the second beam 522 further drives the magazine rack 3 to rotate so as to cooperate with the anvil 2 to make the magazine rack 3 and the anvil 2 change from the open state to the closed state, and the target tissue can be clamped therebetween. In the closing process, the firing block 42 generates an upward acting force on the safety mechanism 6, so that the stopping area 64 moves upward to be separated from the blocking part 531, at this time, the stopping area 64 avoids the blocking part 531 and the push knife rod 51, and the push knife rod 51 can continuously push the cutting knife and the firing block 42 to move towards the far end through the firing handle.

After the cutting and suturing are completed, the push broach assembly 5 and the safety mechanism 6 are reset, but under the condition that a new nail bin 4 is not replaced, if the nail bin assembly is fired again, the push broach rod 51 drives the cutter to move towards the far end of the nail bin assembly, and at the moment, the stop area 64 of the reset safety mechanism 6 is matched with the stop part 531 to prevent the push broach assembly 5 from continuously moving towards the far end, so that the function of preventing misoperation is achieved.

In order to increase the service life of the securing device 6 even more times, the stop region 64 can be moved upwards by approximately 2mm, for example 1 to 3mm, when it is moved from the locked state into the unlocked state; the difference between the angle between the elastic deformation area 62 and the anvil surface of the anvil 2 when the elastic deformation area 62 is not deformed and the angle between the elastic deformation area 62 and the anvil surface of the anvil 2 when the elastic deformation area is maximally deformed is about 5 degrees, for example, 3 to 7 degrees; the steel wire is 304 stainless steel.

In the present embodiment, the safety mechanism 6 is formed by bending an elastic wire. Further, in order to increase the contact area between the trigger block 42 and the driving area 63 and avoid the wear and damage of the trigger block 42, the safety mechanism 6 of the present invention is not limited to the steel wire and the shape in the present embodiment, and in another embodiment, as shown in fig. 19 to 20, the driving area 63 of the safety mechanism 6 is formed by a plastic piece, and the other parts of the safety mechanism 6 are formed by bending an elastic steel wire and the plastic piece is fixedly connected with the elastic steel wire. And in the present invention, the safety mechanism 6 may not include the buffer section 65.

The present invention has been described in detail in order to enable those skilled in the art to understand the invention and to practice it, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.

Claims (10)

1. A staple cartridge assembly, comprising: which comprises

A housing (1);

the nail anvil (2) is fixedly arranged at the far end of the shell (1);

the nail bin frame (3) is rotatably arranged at the far end of the shell (1) and can be matched with the nail anvil (2) to clamp tissues;

a cartridge (4) detachably mounted in the cartridge rack (3), the cartridge (4) comprising a cartridge body (41), a firing block (42) movable within the cartridge body (41);

the push broach assembly (5), the push broach assembly (5) is installed in the shell (1) and can move along the axial direction of the shell (1), and a blocking part (531) is arranged on the push broach assembly (5);

the safety mechanism (6) comprises a mounting area (61) positioned at the far end, an elastic deformation area (62) which is positioned at the near end of the mounting area (61) and can be elastically deformed, a driving area (63) positioned at the near end of the mounting area (61), and a stopping area (64) which is positioned at the near end and can be matched with the blocking part (531); the mounting area (61) is fixedly connected with the nail anvil (2); the safety mechanism (6) has a locking state and an unlocking state, when the safety mechanism (6) is in the locking state, the stop area (64) and the blocking part (531) are matched to prevent the push broach assembly (5) from moving towards the far end, and the extension direction of the driving area (63) is consistent with the moving direction of the push broach assembly (5); when the safety mechanism (6) is in an unlocked state, the stopping area (64) is separated from the blocking part (531), and the push knife component (5) can drive the firing block (42) to move towards the far end together;

when the firing block (42) is located at the near end of the nail bin body (41), the push knife component (5) moves towards the far end to drive the nail bin frame (3) to rotate so as to be matched with the nail anvil (2), the firing block (42) is matched with the driving area (63), and the elastic deformation area (62) deforms, so that the safety mechanism (6) is converted from a locking state to an unlocking state.

2. The staple cartridge assembly of claim 1, wherein: the surface of the firing block (42) matched with the driving area (63) is a plane, and the extending direction of the firing block is consistent with the extending direction of the nail bin body (41); and/or a sliding groove (53) for moving the stopping area (64) is formed on the push broach assembly (5), and the blocking part (531) is a side wall of the proximal end of the sliding groove (53).

3. The staple cartridge assembly of claim 1, wherein: the far end of the elastic deformation area (62) is fixedly connected with or integrally arranged with the near end of the mounting area (61), and the near end is fixedly connected with or integrally arranged with the far end of the driving area (63); and/or the elastic deformation area (62) extends from the far end to the near end towards the inner part of the nail box assembly in an inclined way.

4. The staple cartridge assembly of claim 1, wherein: a groove (421) is formed on one of the nail box body (41) and the firing block (42), and a convex part (411) matched with the groove (421) is formed on the other.

5. The staple cartridge assembly of claim 1, wherein: the blocking area (64) is in a rod shape and extends along the left-right direction of the nail bin assembly, a matching part (11) protruding upwards is formed on the shell (1), and when the safety mechanism (6) is in a locking state, the blocking part (531) and the matching part (11) are respectively located at the near end and the far end of the blocking area (64) and are in contact with the blocking area (64).

6. The staple cartridge assembly of claim 5, wherein: the left side and the right side of the shell (1) are respectively provided with the matching parts (11); and/or the part of the safety mechanism (6) connected with the stop area (64) is positioned outside the matching part (11).

7. The staple cartridge assembly of claim 1, wherein: the safety mechanism (6) further comprises a buffer area (65) arranged between the driving area (63) and the stopping area (64), and the buffer area (65) is bent.

8. The staple cartridge assembly of claim 1, wherein: safety mechanism (6) are elastic steel wire bending type, perhaps, drive area (63) are formed by the working of plastics, the other part of safety mechanism (6) are formed by elastic steel wire bending type, the working of plastics with elastic steel wire looks fixed connection.

9. The staple cartridge assembly of any one of claims 1-8, wherein: the safety mechanism (6) is of a bilaterally symmetrical structure, and a channel (66) through which the push broach assembly (5) can pass is formed in the safety mechanism.

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

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