CN213489060U

CN213489060U - Nail bin assembly and medical anastomat with same

Info

Publication number: CN213489060U
Application number: CN202021800259.1U
Authority: CN
Inventors: 杜祥金; 王文建; 叶艳平
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-06-22
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a nail bin assembly and a medical anastomat with the nail bin assembly, wherein the nail bin assembly comprises a push cutter rod, a first clamp, a second clamp, a firing block and a cutter, the cutter comprises a cutter body positioned between a first end part and a second end part, and the first end part and the second end part are matched with the first clamp and the second clamp; the proximal end of the first clamp is provided with a limiting part, the cutter body is provided with a safety part, when the triggering block is positioned at the proximal end of the nail bin assembly, the push-type broach rod drives the cutter and the triggering block to move towards the distal end of the nail bin assembly together, and when the triggering block is positioned at the distal end of the nail bin assembly, the push-type broach rod drives the cutter to move towards the distal end of the nail bin assembly until the limiting part and the safety part are mutually abutted to limit the cutter to continue to move towards the distal end of the nail bin assembly. The utility model discloses a spacing portion can support each other with the safety part and hold to the restriction cutter continues to the distal end motion of nail storehouse subassembly, can prevent effectively that the doctor from closing apparatus under the condition of not changing the nail storehouse subassembly of percussion.

Description

Nail bin assembly and medical anastomat with same

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to nail storehouse subassembly and have medical anastomat of this nail storehouse subassembly.

Background

The medical anastomat is a medical instrument frequently used when a surgical operation is carried out on physiological tissues such as intestinal tracts and the like, is a device used in medicine to replace the traditional manual suture, has the advantages of reliable quality, convenient use, tightness and proper tightness due to the development of modern science and technology and the improvement of manufacturing technology, particularly has the advantages of quick suture, simple and convenient operation, few side effects, few operation complications and the like, sometimes enables the tumor operation which cannot be resected in the past to be resected at a focus, is very popular and advocated by domestic and foreign clinical surgeons, and the difference of the performance of the instrument plays a vital role in the whole operation effect.

In the prior art, a linear medical stapler for minimally invasive surgery comprises an instrument platform and a nail bin assembly matched with the instrument platform, wherein the instrument platform comprises a shell and a firing handle arranged on the shell through a pivot, a push rod capable of moving relatively is arranged in the shell, and the push rod can push the nail bin assembly positioned at the front end of the shell to suture and cut.

Specifically, the nail bin assembly comprises a nail bin frame and a nail anvil which is connected with the nail bin frame in a pivot mode, and the nail bin frame is detachably provided with a nail bin.

The nail bin assembly further comprises a nail bin connecting piece used for connecting the instrument platform, the nail bin frame, the nail anvil and the nail bin, a push knife rod capable of moving relatively is arranged in the nail bin connecting piece, the push knife rod is connected with the push rod in a matching mode, a cutter is fixed to the far end of the push knife rod, the nail bin and the nail anvil are closed in the advancing process of the cutter, tissues between the nail bin and the nail anvil are cut off, the trigger block is driven to sequentially push the nail pushing piece out of the nail bin, and then the nail pushing piece pushes the suturing nail out of the nail bin and is bound on the tissues.

After the surgeon finishes the above-mentioned suturing and cutting action, the surgeon needs to reset the instrument first and then replace the staple cartridge assembly, so that the medical stapler can perform the next suturing and cutting operation, however, some careless surgeons or inexperienced surgeons may perform the next operation without replacing the fired staple cartridge assembly, which may cause a medical accident, that is, the surgeon performs the excision without suturing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nail storehouse subassembly and have medical anastomat of this nail storehouse subassembly.

In order to realize one of the above objects of the present invention, an embodiment of the present invention provides a nail cartridge assembly, including:

the nail bin connecting piece comprises a shell and a push-type cutter rod positioned in the shell;

a first jaw and a second jaw located at a distal end of the cartridge link and openable/closable;

a firing block movably disposed within the first jaw or the second jaw;

the cutting knife is positioned at the far end of the push knife rod, and can push the firing block to move under the action of the push knife rod, the cutting knife comprises a first end part, a second end part and a cutting knife body positioned between the first end part and the second end part, the first end part is matched with the first clamp, and the second end part is matched with the second clamp;

when the triggering block is positioned at the far end of the nail bin assembly, the cutter pushing rod drives the cutter to move towards the far end of the nail bin assembly until the limiting portion and the safety portion abut against each other to limit the cutter to continue moving towards the far end of the nail bin assembly.

As a further improvement of an embodiment of the present invention, the safety portion and the cutter body are configured to be movable relatively, when the trigger block is located at the proximal end of the nail cartridge assembly, the trigger block abuts and drives the safety portion to be opposite to the cutter body so as to move and separate the safety portion from the limit portion.

As a further improvement of an embodiment of the present invention, the safety portion has elasticity, and the trigger block drives the safety portion to deform so that the safety portion and the limiting portion are separated from each other.

As a further improvement of an embodiment of the present invention, the safety portion includes a movable portion, and the trigger block drives the movable portion to be opposite to the cutter body to rotate so that the safety portion is separated from the limiting portion.

As a further improvement of an embodiment of the present invention, the first jaw is a nail bin frame and a nail bin connected to each other, the second jaw is a nail anvil, the spacing portion is located the nail bin frame, the nail bin frame is provided with a cooperation the feeding groove that the cutter advances, the spacing portion is adjacent to the feeding groove, the safety portion is including corresponding the driving portion that the feeding groove set up and corresponding the backstop portion that the spacing portion set up, the firing block include with the portion is relieved to driving portion complex insurance.

As a further improvement of an embodiment of the present invention, the limiting portion includes a first limiting portion and a second limiting portion located at both sides of the chute, the stopping portion includes a first stopping portion and a second stopping portion protruding out of the driving portion, the first stopping portion reaches the second stopping portion respectively cooperates with the first limiting portion and the second limiting portion.

As a further improvement of an embodiment of the present invention, the driving portion includes a fixing hole, and the stopping portion includes a stopping portion body penetrating the fixing hole and a first stopping portion and a second stopping portion located at two ends of the stopping portion body.

As a further improvement of an embodiment of the present invention, the cutter body includes a first portion connecting the first end portion and the second end portion, and a second portion protruding out of the first portion toward the distal end of the cartridge assembly, the driving portion is connected to the second portion, the stopper portion is located at one end of the second portion which is far away from the driving portion, and the stopper portion is a free end.

As a further improvement of an embodiment of the present invention, the driving portion includes a connection portion for supporting the stopping portion, the supporting portion has a first inclined plane, the safety releasing portion has a second inclined plane, when the trigger block is located the proximal end of the nail cartridge assembly and the push rod drives the cutter to when the distal end of the nail cartridge assembly moves, the second inclined plane butt is driven by the first inclined plane the supporting portion reaches the stopping portion towards being close to the direction movement of the second portion.

As a further improvement of an embodiment of the present invention, the driving portion further includes a connecting portion connecting the abutting portion, and the connecting portion and the second portion are fixed to each other.

As a further improvement of an embodiment of the present invention, the connecting portion includes a fixing portion and a bending portion connected to each other, the fixing portion is fixed to the second portion, the bending portion is connected to the fixing portion and the supporting portion, and the fixing portion is located on the same side of the bending portion.

As an improvement of an embodiment of the present invention, the bending portion and the fixed portion reach support and have first contained angle and second contained angle between the portion respectively, first contained angle is the right angle, works as the second inclined plane does not butt when first inclined plane, the second contained angle is the obtuse angle, then works as second inclined plane butt first inclined plane and drive support and hold the portion and backstop portion court is close to during the direction motion of second part, the second contained angle is the trend that reduces.

In order to achieve one of the above objects of the present invention, an embodiment of the present invention provides a medical stapler, including the above staple cartridge assembly according to any one of the above technical solutions.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses an embodiment is at least at the secondary percussion in-process, and spacing portion supports each other with the safety part and holds to the restriction the cutter continues to the distal end motion of nail storehouse subassembly can prevent effectively that the doctor from not changing closed apparatus under the condition of the nail storehouse subassembly of percussion, avoids the emergence of medical accident or produces the injury to normal tissue, and simple structure is effective.

Drawings

Fig. 1 is a schematic structural view of a medical stapler according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partially exploded structure of a cartridge assembly according to an embodiment of the present invention;

FIG. 3 is a schematic view of a partially exploded structure of a cartridge assembly according to an embodiment of the present invention;

FIG. 4 is a schematic view of a staple cartridge rack according to an embodiment of the present invention;

FIG. 5 is a schematic view of a firing block according to an embodiment of the present invention;

fig. 6 is a schematic view of a cutter according to an embodiment of the present invention engaged with a safety portion;

fig. 7 is an exploded view of a cutter and a safety portion according to an embodiment of the present invention;

FIG. 8 is a schematic view of a cutter in accordance with another embodiment of the present invention in cooperation with a guard;

FIG. 9 is a schematic view of a cutter cooperating with a guard according to another embodiment of the present invention;

fig. 10 to 13 are schematic views of the cutter according to the second to fifth examples of the present invention engaged with the safety portion;

FIG. 14 is a schematic view of a first embodiment of the present invention with a staple cartridge assembly in an open position;

FIG. 15 is a sectional view A-A of FIG. 14;

FIG. 16 is an enlarged view of a portion of the structure of FIG. 15;

FIG. 17 is a cross-sectional view of the first embodiment of the staple cartridge assembly of the present invention during closure;

FIG. 18 is an enlarged view of a portion of the structure of FIG. 17;

FIG. 19 is a schematic view of a first embodiment of a staple cartridge assembly of the present invention in a closed position;

FIG. 20 is a sectional view A-A of FIG. 19;

fig. 21 is an enlarged view of a portion of the structure of fig. 20.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.

The words expressing the position and direction described in the utility model are all referred by the operator of the instrument, the end close to the operator is the near end, and the end far away from the operator is the far end.

In the various drawings of the present invention, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration, and thus, are used only to illustrate the basic structure of the subject matter of the present invention.

Terms such as "upper," "above," "lower," "below," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the embodiments of the present invention, the medical stapler of the present invention is specifically explained by taking a cavity mirror surgical cutting 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.

As shown in fig. 1 to 3, the medical stapler is used to apply a plurality of staples to a physiological tissue of a human body while cutting the physiological tissue accordingly. The medical stapler includes an instrument platform 10, a coil 20 coupled to the instrument platform 10, and a firing handle 30 pivotally coupled to the instrument platform 10.

Disposed within the instrument platform 10 is a push rod that is movable relative to the housing of the instrument platform 10 by the firing handle 30.

The distal end of the instrument platform 10 is also provided with a cartridge assembly 40, and the cartridge assembly 40 is detachably connected with the instrument platform 10.

Cartridge assembly 40 includes a cartridge link 44 and first and second jaws that are openable/closable at a distal end of cartridge link 44.

The cartridge assembly 40 includes a cartridge 41, an anvil 42, and a cartridge frame 43, wherein a first jaw is an example of the cartridge frame 43 and the cartridge 41 connected to each other, and a second jaw is the anvil 42, but not limited thereto.

The cartridge link 44 includes a housing 48 and a pusher bar 47 located within the housing 48.

The cartridge assembly 40 further includes a knife 45 at a distal end of a pusher bar 47 and a firing block 49 movably disposed in the first or second jaw, the firing block 49 being located in the cartridge 41.

The cutter 45 can push the firing block 49 to move under the action of the push knife rod 47 so as to push the nail pushing sheets out of the nail bin 41 in sequence, and then the nail pushing sheets push the stitching nails out of the nail bin 41 and stitch the stitching nails on the tissue.

The cartridge module 40 further comprises a joint 46 disposed at the distal end of the cartridge link 44, and the rotation direction and the rotation angle of the joint 46 are controlled to enable the area defined by the cartridge 41 and the anvil 42 to rotate relative to the cartridge link 44, so as to adapt to the multi-angle cutting anastomosis operation.

Of course, joint 46 may be absent in instruments where cartridge assembly 40 cannot be rocked.

The cartridge carrier 43 defines a support channel for mountably receiving the cartridge 41 therein, the cartridge carrier 43 being adapted to connect the cartridge 41 to the cartridge link 44.

In the present embodiment, the staple cartridge 41 and the anvil 42 are configured to be relatively rotatable, and when the staple cartridge 41 and the anvil 42 are rotated to an open state, the target tissue to be operated can be placed therebetween, and then, by rotating the staple cartridge to a closed state, the target tissue positioned therebetween is clamped for the subsequent cutting and stapling operation.

When the medical stapler/cartridge assembly 40 is in an initial state, an anvil tail at the proximal end of the anvil 42 is subjected to an external force to keep the anvil 42 and the cartridge 41 open, and the cutter 45 is located at the proximal end of the cartridge assembly 40.

When the medical stapler/cartridge assembly 40 is in the closed state, the anvil 42 and the cartridge 41 are closed by the cutting knife 45, and the target tissue can be clamped therebetween, and the cutting knife 45 is moved a certain distance toward the distal end of the medical stapler/cartridge assembly 40 with respect to the initial state, but still located at the proximal end of the cartridge assembly 40 as a whole.

When the medical anastomat/cartridge assembly 40 is in a firing state, the anvil 42 and the cartridge 41 are still kept closed, and the cutting knife 45 moves from the near end of the cartridge assembly 40 to the far end to cut clamped physiological tissues and can be limited and stopped moving at the far end of the cartridge assembly 40.

With reference to fig. 3, the cutter 45 includes a first end portion 451, a second end portion 452 and a cutter body 453 located between the first end portion 451 and the second end portion 452, the first end portion 451 being engaged with the first jaw and the second end portion 452 being engaged with the second jaw.

Specifically, the cartridge holder 43 comprises a first interference surface 432 which is away from the anvil 42 and cooperates with the first end 451 of the cutting knife 45; anvil 42 includes a second interference surface 422 opposite the anvil surface and cooperating with second end 452 of knife 45.

The magazine 41, the anvil 42, and the magazine holder 43 are formed with

knife paths

411, 421, and 431 that run in cooperation with the knife 45. The knife-

way channels

411, 421, 431 extend from the proximal ends of the cartridge 41, the anvil 42, and the cartridge rack 43, respectively, to the distal ends thereof. When cartridge 41 and anvil 42 are closed,

knife paths

411, 421, 431 can cooperate to form a channel that allows knife 45 to move in a distal direction, or a distal direction, from the proximal end of cartridge assembly 40.

The pusher bar 47 may drive the cutting blade 45 to move distally from the proximal end of the

slots

411, 421, 431 or to move proximally from the distal end. The

knife paths

411, 421 and 431 provide a moving path for the knife 45 and the knife pushing rod 47 and guide them simultaneously in the process, when the area defined by the anvil 42 and the nail box 41 rotates a certain angle relative to the nail box connecting piece 44, the knife pushing rod 47 bends a certain angle along with it, so that the knife 45 can move smoothly towards the far end of the medical anastomat.

Referring to fig. 4 to 8, in an embodiment of the present invention, the proximal end of the first jaw is provided with a limiting portion 433, and the cutter body 453 is provided with a safety portion 454.

Here, the proximal end of the magazine holder 43 is provided with the stopper 433, but not limited thereto.

When the firing block 49 is located at the proximal end of the nail bin assembly 40, the knife pushing rod 47 drives the cutting knife 45 and the firing block 49 to move together towards the distal end of the nail bin assembly 40, and when the firing block 49 is located at the distal end of the nail bin assembly 40, the knife pushing rod 47 drives the cutting knife 45 to move towards the distal end of the nail bin assembly 40 until the limiting portion 433 abuts against the safety portion 454 to limit the cutting knife 45 to continue moving towards the distal end of the nail bin assembly 40.

Here, when the cutting knife 45 moves towards the distal end of the nail cartridge assembly 40 for the first time (i.e. the firing block 49 is located at the proximal end of the nail cartridge assembly), the knife pushing bar 47 drives the cutting knife 45 and the firing block 49 to move towards the distal end of the nail cartridge assembly 40 together to realize the cutting and suturing operations; when the cutting knife 45 moves towards the far end of the nail bin assembly 40 for the second time (namely, the nail bin 41 is not replaced with a new one, and the triggering block 49 is triggered and positioned at the far end of the nail bin assembly 40), the safety part 454 and the limiting part 433 abut against each other to limit the cutting knife 45 to continue moving towards the far end of the nail bin assembly 40, so that the secondary triggering of a doctor under the condition that the triggering is completed is effectively prevented, the occurrence of medical accidents or the damage to normal tissues is avoided, and the structure is simple and effective.

It should be emphasized that, when the staple cartridge assembly 40 clamps tissue, the tension generated by the tissue drives the first end portion 451 and the second end portion 452 of the cutting knife 45 to move relative to the staple cartridge rack 43 and the anvil 42, and the safety portion 454 of the present embodiment is disposed at the knife body 453, even if the relative movement is generated, the safety portion 454 can still stably cooperate with the limiting portion 433, so that the safety failure can be effectively avoided.

In the present embodiment, the safety portion 454 and the cutter body 453 are configured to be relatively movable, and when the firing block 49 is located at the proximal end of the cartridge module 40, the firing block 49 abuts and drives the safety portion 454 to move relative to the cutter body 453, so that the safety portion 454 and the limiting portion 433 are separated from each other.

In one example, the safety 454 is resilient.

Here, the "safety part 454 having elasticity" means that a part of the structure of the safety part 454 has elasticity, or the whole safety part 454 has elasticity, and the safety part 454 has elasticity such that the safety part 454 is deformed by an external force.

When the firing block 49 is located at the proximal end of the cartridge module 40, the firing block 49 abuts and drives the safety portion 454 to deform, so that the safety portion 454 and the limiting portion 433 are separated from each other.

Here, the limiting portion 433 is located on the traveling path of the safety portion 454, and without the effect of the trigger block 49, when the push rod 47 drives the cutter 45 to move towards the distal end of the nail cartridge assembly 40, the safety portion 454 will be abutted against the limiting portion 433 to enable the nail cartridge assembly 40 to enter a safety state, and in the present embodiment, when the trigger block 49 is located at the proximal end of the nail cartridge assembly 40, the trigger block 49 will drive the safety portion 454 to deform to avoid the safety portion 454 being abutted against the limiting portion 433, so that the push rod 47 drives the cutter 45 and the trigger block 49 to move towards the distal end of the nail cartridge assembly 40 together to implement the cutting and suturing operations.

Of course, the safety portion 454 is not limited to have elasticity, and in another example, in combination with fig. 9, the safety portion 454 'includes a movable portion 4541', and the triggering block 49 drives the movable portion 4541 'to rotate relative to the cutter body 453' so that the safety portion 454 'and the limiting portion 433 are separated from each other, that is, the movable portion 4541' can be mechanically rotated by the triggering block 49.

Specifically, the safety portion 454 'includes a movable portion 4541' and a positioning portion 4542 'which are pivotally connected, the positioning portion 4542' and the cutter body 453 'are fixed to each other, and the trigger block 49 drives the movable portion 4541' to rotate relative to the positioning portion 4542 'toward a side close to the cutter body 453' so as to move the movable portion 4541 'upward, at this time, it can be seen that the movable portion 4541' rotates relative to the cutter body 453 ', but of course, the movable portion 4541' may also be directly pivotally connected to the cutter body 453 'so as to rotate the movable portion 4541'.

In the present embodiment, the stopper 433 is provided adjacent to the slot 431 of the magazine holder 43, the safety 454 includes a driving unit 455 provided corresponding to the slot 431 and a stopper 456 provided corresponding to the stopper 433, and the trigger 49 includes a safety release unit 491 engaged with the driving unit 455.

Here, the phrase "the driving portion 455 is disposed corresponding to the feeding groove 431" means that in the direction of the second jaw toward the first jaw, the vertical projection of the driving portion 455 at the feeding groove 431 is located within the range defined by the feeding groove 431, in other words, when the pushing rod 47 drives the cutting knife 45 to move toward the distal end of the magazine assembly 40, the driving portion 455 moves in the feeding groove 431, or the driving portion 455 moves in the region directly above the feeding groove 431, so that the driving portion 455 can be prevented from obstructing the movement of the cutting knife 45 toward the distal end of the magazine assembly 40.

In addition, the term that the stopping portion 456 is disposed corresponding to the limiting portion 433 means that the limiting portion 433 is located on the traveling path of the stopping portion 456, so that when the pushing rod 47 drives the cutting knife 45 to move toward the distal end of the magazine assembly 40 and the stopping portion 456 moves to abut against the limiting portion 433, the limiting portion 433 can limit the whole cutting knife 45 to continue to move toward the distal end of the magazine assembly 40 by limiting the stopping portion 456.

Specifically, the limiting portion 433 includes a first limiting portion 433a and a second limiting portion 433b located at two sides of the channel 431, the stopping portion 456 includes a first stopping portion 456a and a second stopping portion 456b protruding out of the driving portion 455, and the first stopping portion 456a and the second stopping portion 456b are respectively matched with the first limiting portion 433a and the second limiting portion 433 b.

Here, the first and second limiting

portions

433a and 433b are symmetrically disposed on both sides of the feeding groove 431, and the first and second stopping

portions

456a and 456b are symmetrically disposed on both sides of the driving portion 455, so that the stability of the fit between the limiting portions 433 and the stopping portions 456 can be improved.

In this embodiment, the driving portion 455 includes a fixing hole 4551, and the stopping portion 456 includes a stopping portion body 4561 penetrating through the fixing hole 4511, and a first stopping portion 456a and a second stopping portion 456b located at two ends of the stopping portion body 4561.

Specifically, the driving portion 455 is a spring structure, one end of the driving portion 455 is connected to the cutter body 453, the other end of the driving portion 455 is a free end provided with a fixing hole 4551, the stopping portion 456 is limited in the fixing hole 4551, and the stopping portion 456 is substantially a strip-shaped structure with a thin middle and thick two ends, that is, the longitudinal cross-sectional dimensions of the first stopping portion 456a and the second stopping portion 456b are greater than the longitudinal cross-sectional dimension of the stopping portion body 4561, so that the stopping portion 456 can be prevented from being separated from the driving portion 455.

Here, the stopping portion 456 and the driving portion 455 may be relatively stationary, or the stopping portion 456 and the driving portion 455 may be relatively rotatable, and according to practical situations, the outer contours of the first stopping portion 456a and the second stopping portion 456b are circular arc surfaces, and the first limiting portion 433a and the second limiting portion 433b are convex columns with planes, and when the stopping portion 456 abuts against the limiting portion 433, the circular arc surfaces actually abut against the planes, on one hand, stable matching between the stopping portion 456 and the limiting portion 433 can be achieved under the condition that the driving portion 455 is not stressed, on the other hand, when the safety release portion 491 of the firing block 49 drives the driving portion 455 to deform, the driving portion 455 drives the stopping portion 456 to move together, and the design of the circular arc surfaces can enable the stopping portion 456 to easily disengage from the limitation of the limiting portion 433.

It should be noted that the driving portion 455 may be a spring structure, the stopping portion 456 may be a non-elastic structure, and the two may be integrally formed or assembled together after being formed separately, but not limited thereto.

In this embodiment, cutter body 453 includes a first portion 4531 connecting first end 451 and second end 452, and a second portion 4532 protruding from first portion 4531 toward the distal end of cartridge assembly 40, driver 455 is connected to second portion 4532, stop 456 is located at an end of driver 455 away from second portion 4532, and stop 456 is a free end.

Here, the second portion 4532 extends from substantially the middle of the first portion 4531 in the horizontal direction, and the driving portion 455 is fixed below the second portion 4532, but of course, the driving portion 455 may be disposed at other positions, and in addition, "the stopping portion 456 is a free end" means that the stopping portion 456 is not connected to the cutter body 453, and when the driving portion 455 is stressed, the driving portion 455 can drive the stopping portion 456 to move together.

In the present embodiment, the driving portion 455 includes an abutting portion 4552 connected to the stopping portion 456, and a connecting portion 4555, and the connecting portion 4555 and the second portion 4532 are fixed to each other.

There are various examples of the form of the connecting portion 4555 and the fixing form of the connecting portion 4555 and the second portion 4532, and hereinafter, various examples will be briefly described.

In a first example, referring to fig. 7, the connecting portion 4555 includes a fixing portion 4553 and a bending portion 4554 connected to each other, the fixing portion 4553 and the second portion 4532 are fixed to each other, the bending portion 4554 connects the fixing portion 4553 and the supporting portion 4552, and the fixing portion 4553 and the supporting portion 4552 are located on the same side of the bending portion 4554, that is, the fixing portion 4553, the bending portion 4554 and the supporting portion 4552 are sequentially connected and substantially in a "]" shape.

Specifically, the fixing portion 4553 and the second portion 4532 are fixed to each other, for example, by welding, or, with reference to fig. 8, an end of the fixing portion 4553 away from the bending portion 4554 has an extending portion 45531 turned upward, while the second portion 4532 is correspondingly provided with a notch 45321, and the extending portion 45531 is fixed in the notch 45321 to fix the fixing portion 4553 and the second portion 4532.

Here, extension 45531 may be secured within recess 45321 by adhesive or extension 45531 may be made of a compressible resilient material such that when extension 45531 is inserted into recess 45321, extension 45531 and recess 45321 are in interference fit to secure extension 45531 and recess 45321 to one another.

Of course, the fixing manner between the fixing portion 4553 and the second portion 4532 is not limited to the above description, and may be determined according to actual circumstances.

A first included angle and a second included angle are respectively formed between the bending portion 4554 and the fixing portion 4553 and the abutting portion 4552, and when the driving portion 455 is not under stress, the first included angle is a right angle, and the second included angle is an obtuse angle, but not limited thereto.

The supporting portion 4552 has a first inclined surface 45521, the safety relief portion 491 of the firing block 49 has a second inclined surface 4911, when the firing block 49 is located at the proximal end of the cartridge module 40 and the push-type knife bar 47 drives the knife 45 to move towards the distal end of the cartridge module 40, the second inclined surface 4911 abuts against the first inclined surface 45521 to drive the supporting portion 4552 and the stopping portion 456 to move towards the direction close to the second portion 4532, in other words, when the second inclined surface 4911 does not abut against the first inclined surface 45521, the second included angle is an obtuse angle, and then when the second inclined surface 4911 abuts against the first inclined surface 45521 to drive the supporting portion 4552 and the stopping portion 456 to move towards the direction close to the second portion 4532, the second included angle is reduced, and at the same time, the first included angle remains unchanged, but not limited thereto, the first included angle may also be changed.

Here, the safety relief 491 further includes a support surface 4912 located at a distal end of the second inclined surface 4911 and extending in a horizontal direction, and in a specific example, when the second included angle is reduced to 90 °, the first inclined surface 45521 is engaged with the support surface 4912, so that the stability of the engagement between the cutting knife 45 and the firing block 49 can be improved.

In a second example, referring to fig. 10, the connecting portion 4555a includes a fixed portion 4553a and a bent portion 4554a connected to each other, a notch 45321a is provided at a distal end face of the second portion 4532a, the fixed portion 4553a is fixed in the notch 45321a, and the bent portion 4554a is disposed in close proximity to the distal end face of the second portion 4532 a.

In a third example, referring to fig. 11, the connecting portion 4555b includes a fixed portion 4553b and a bent portion 4554b which are connected, the fixed portion 4553b is fixed at an upper end face of the second portion 4532b, and the bent portion 4554b is disposed in close proximity to a distal end face of the second portion 4532 b.

In a fourth example, referring to fig. 12, the safety portion 454c only includes a holding portion 4552c and a connecting portion 4555c connected, and the connecting portion 4555c is fixed to the distal end face of the second portion 4532 c.

In a fifth example, referring to fig. 13, the safety portion 454d only includes a continuous abutting portion 4552d and a connecting portion 4555d, a notch 45321d is provided at a lower end face of the second portion 4532d, and the connecting portion 4555d is fixed in the notch 45321 d.

It should be noted that, for the fixing manner of the fixing portion 4553 or the connecting portion 4555 and the second portion 4532 in the second to fifth examples, reference may be made to the description of the first example, and details are not repeated here.

Next, the operation principle of the magazine assembly 40 of the present embodiment will be described in detail.

When the nail bin 41 is not mounted on the nail bin frame 43, that is, when the firing block 49, the nail pushing sheet and other components are not mounted, the cutter pushing rod 47 theoretically cannot drive the cutter 45 to move towards the far end of the nail bin assembly 40, in actual operation, some misoperation can drive the cutter pushing rod 47 to drive the cutter 45 to move towards the far end of the nail bin assembly 40, at this time, because the nail bin frame 43 is provided with the limiting portion 433, the safety portion 454 and the limiting portion 433 at the position of the cutter 45 abut against each other to limit the cutter 45 to continue to move towards the far end of the nail bin assembly 40, and thus, the cutter 45 can be prevented from being mistakenly struck under the condition that the nail bin 41 is not mounted in place.

Referring to fig. 14 to 16, when the cartridge 41 is mounted to the cartridge carrier 43, the firing block 49 is mounted to the traveling path of the cutting knife 45, and the assembly of the medical stapler is completed.

Referring to fig. 17 and 18, when the magazine assembly 40 enters the closing process, the pusher bar 47 drives the cutting knife 45 to move toward the distal end of the magazine assembly 40, the safety portion 454 of the cutting knife 45 gradually approaches the safety release portion 491 of the firing block 49, and when the magazine assembly 40 continues to close, the safety release portion 491 drives the safety portion 454 to move upward, so that the safety portion 454 and the limiting portion 433 are separated from each other.

Here, when the safety portion 454 contacts the safety release portion 491, the first inclined surface 45521 and the second inclined surface 4911 move close to each other so that the abutting portion 4552 drives the stopping portion 456 to move upward, and the stopping portion 456 and the limiting portion 433 separate from each other, and then when the proximal end surface of the safety release portion 491 abuts against the first portion 4531 of the cutter body 453, or the distal end surface of the second portion 4532 abuts against other portions of the firing block 49, the cutter 45 and the firing block 49 are relatively stationary, and the subsequent pusher bar 47 drives the cutter 45 and the firing block 49 to move together toward the distal end of the magazine assembly 40.

It should be noted that the safety portion 454 may contact the limiting portion 433 before contacting the safety releasing portion 491, and then the stopping portion 456 at the safety portion 454 is separated from the limiting portion 433 under the action of the safety releasing portion 491, or the safety portion 454 contacts the safety releasing portion 491 before contacting the limiting portion 433, that is, the safety releasing portion 491 directly drives the safety portion 454 to deform, so that the safety portion 454 is not limited to the limiting portion 433.

Referring to fig. 19 to 21, when the nail cartridge assembly 40 enters the complete closing process, the knife pushing rod 47 drives the knife 45 and the firing block 49 to move together towards the distal end of the nail cartridge assembly 40 until the nail cartridge assembly 40 is completely closed, and then the knife pushing rod 47 drives the knife 45 and the firing block 49 to perform a cutting and suturing operation.

When the nail bin assembly 40 enters the closing process for the second time, the cutter pushing rod 47 drives the cutter 45 to move towards the distal end of the nail bin assembly 40, the safety portion 454 and the limiting portion 433 abut against each other to limit the cutter 45 to continue moving towards the distal end of the nail bin assembly 40, the nail bin assembly 40 enters the safety state, at the moment, the firing block 49 is located at the distal end of the nail bin assembly 40, the safety portion 454 cannot move upwards, and the nail bin assembly 40 is kept in the safety state, so that secondary firing is prevented.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A staple cartridge assembly, comprising:

a firing block movably disposed within the first jaw or the second jaw;

2. The staple cartridge assembly of claim 1, wherein said guard and said cutter body are configured to move relative to each other, and when said firing block is located at the proximal end of said staple cartridge assembly, said firing block abuts and drives said guard to move relative to said cutter body such that said guard and said stop separate from each other.

3. The staple cartridge assembly of claim 2, wherein said safety feature is resilient and said firing block drives said safety feature to deform such that said safety feature and said retention feature disengage from each other.

4. The staple cartridge assembly of claim 2, wherein said guard comprises a movable portion, and said firing block drives said movable portion to rotate relative to said cutter body such that said guard and said stop are disengaged from each other.

5. The staple cartridge assembly of claim 2, wherein said first jaw is a connected cartridge frame and a staple cartridge, said second jaw is an anvil, said position-limiting portion is located on said cartridge frame, said cartridge frame is formed with a slot for cooperating with said cutting knife to travel, said position-limiting portion is disposed adjacent to said slot, said safety portion comprises a driving portion disposed corresponding to said slot and a stopping portion disposed corresponding to said position-limiting portion, and said firing block comprises a safety-releasing portion cooperating with said driving portion.

6. The staple cartridge assembly according to claim 5, wherein said limiting portions comprise a first limiting portion and a second limiting portion located at two sides of said feeding slot, said stopping portions comprise a first stopping portion and a second stopping portion protruding out of said driving portion, and said first stopping portion and said second stopping portion are respectively engaged with said first limiting portion and said second limiting portion.

7. The staple cartridge assembly of claim 6, wherein said driving portion comprises a fixing hole, and said stopping portion comprises a stopping portion body passing through said fixing hole, and said first stopping portion and said second stopping portion at two ends of said stopping portion body.

8. The staple cartridge assembly of claim 5, wherein said cutter body comprises a first portion connecting said first end and said second end, and a second portion projecting out of said first portion toward the distal end of said staple cartridge assembly, said drive portion being connected to said second portion, said stop being located at an end of said drive portion distal from said second portion, and said stop being a free end.

9. The assembly according to claim 8, wherein said driving portion comprises a supporting portion connected to said stopping portion, said supporting portion has a first inclined surface, said safety releasing portion has a second inclined surface, and when said firing block is located at a proximal end of said cartridge assembly and said knife bar drives said knife to move toward a distal end of said cartridge assembly, said second inclined surface abuts against said first inclined surface to drive said supporting portion and said stopping portion to move toward a direction close to said second portion.

10. The staple cartridge assembly of claim 9, wherein said drive portion further comprises a connecting portion connecting said retaining portion, said connecting portion and said second portion being secured to one another.

11. The staple cartridge assembly according to claim 10, wherein said connecting portion comprises a fixing portion and a bending portion, the fixing portion and the second portion are fixed to each other, the bending portion connects the fixing portion and the supporting portion, and the fixing portion and the supporting portion are located on the same side of the bending portion.

12. The staple cartridge assembly according to claim 11, wherein a first angle and a second angle are respectively formed between the bending portion and the fixing portion and between the bending portion and the abutting portion, the first angle is a right angle, when the second inclined surface is not abutted to the first inclined surface, the second angle is an obtuse angle, and when the second inclined surface is abutted to the first inclined surface to drive the abutting portion and the stopping portion to move toward the direction close to the second portion, the second angle is decreased.

13. A medical stapler characterized by comprising a cartridge assembly according to any one of claims 1-12.