CN111616764A

CN111616764A - Nail bin assembly for surgical instrument and surgical instrument

Info

Publication number: CN111616764A
Application number: CN201910155229.5A
Authority: CN
Inventors: 孙宝峰; 张志星
Original assignee: Jiangsu Fengh Medical Equipment Co Ltd
Current assignee: Jiangsu Fengh Medical Equipment Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-09-04

Abstract

The invention discloses a nail bin assembly for a surgical instrument, which comprises a nail bin and a cutting knife; the nail bin comprises suturing nails, a nail pushing piece and a nail bin body extending along the longitudinal direction, the nail bin body is provided with a nail sewing cavity, the suturing nails are contained in the nail sewing cavity, and the nail pushing piece is used for pushing the suturing nails out of the nail sewing cavity; the nail bin also comprises a pusher used for pushing the nail pushing piece; the cutting knife comprises a knife edge part, and the knife edge part is provided with a cutting edge; the cutting knife is rotatably connected with the pusher, and the cutting edge is not exposed above the top surface of the nail bin body in the initial state or the cutting completion state. The cutting edge of the blade part of the cutting knife can not damage tissues or be damaged by foreign objects in an initial state or a cutting finished state.

Description

Nail bin assembly for surgical instrument and surgical instrument

Technical Field

The present invention relates to the field of surgical instruments.

Background

The surgical instrument is a surgical tool in medical operation, and the suturing instrument is one of the surgical instruments, is a device used in medicine and replaces manual suturing, and mainly works on the principle that a suturing nail is used for separating or inosculating tissues, and is similar to a stapler. The stapling instrument includes a pair of cooperating elongated jaw members that can be adapted to be inserted into a patient to staple and/or cut tissue, and that can support a cartridge. At present, current nail storehouse generally includes the nail storehouse body and sets up the sewing nail at the this internal nail storehouse, this internal a plurality of nail chamber that are used for accomodating the sewing nail that are provided with of nail storehouse. The nail bin body is provided with a knife slot extending along the longitudinal axis of the nail bin body, and the nail cavities are arranged on two sides of the knife slot along the longitudinal axis. The knife slot is used for a cutting knife to move along the knife slot. The cutting burr includes a base portion and a blade portion extending from the base portion, the base portion being positioned within and movable along the blade slot, the blade portion being positioned above the blade slot and adapted to cut tissue. The nail bin body comprises an insertion end and a tail end, and when the tissue is cut, the cutting knife moves from the tail end of the nail bin body to the insertion end of the nail bin body. Because the front side of the nail bin is positioned at the front end of the opening of the jaw member, after the tissue is cut, the knife edge part of the cutting knife is exposed at the front side of the nail bin, when the opened jaw member moves in a patient body or a doctor takes the jaw member out of the patient body, the knife edge part easily damages the tissue, and the doctor is easily injured by the knife edge part when replacing the nail bin.

Disclosure of Invention

The invention aims to provide a nail box assembly for a surgical instrument and the surgical instrument, wherein the nail box assembly does not easily damage tissues in an initial (unused) state or a cutting-finished state.

In order to achieve the purpose, the invention is realized by the following technical scheme: a staple cartridge assembly for a surgical instrument comprises a staple cartridge and a cutting knife; the nail bin comprises a suturing nail, a nail pushing piece and a nail bin body extending along the longitudinal direction, the nail bin body is provided with a nail sewing cavity, the suturing nail is contained in the nail sewing cavity, and the nail pushing piece is used for pushing the suturing nail out of the nail sewing cavity; the nail cabin also comprises a pusher used for pushing the nail pushing piece; the cutting knife comprises a knife edge part, and the knife edge part is provided with a cutting edge; the cutting knife is rotatably connected with the pusher, and the cutting edge is not exposed above the top surface of the nail bin body in the initial state or the cutting completion state.

Further, the nail bin body is provided with a knife slot extending along the longitudinal direction; the pusher comprises a limiting block and abutting parts positioned on two sides of the limiting block, the limiting block is positioned in the cutter slot, and the cutting cutter is rotatably connected to the limiting block.

Furthermore, the limiting block is provided with a groove formed by downwards sinking from the top surface of the limiting block, and the cutting edge is positioned in the groove in an initial state or a cutting completion state.

Further, the nail bin assembly further comprises a rod piece arranged on the pusher, the cutting knife is provided with a through groove, and the rod piece penetrates through the through groove.

Furthermore, the pusher comprises a limiting block and abutting parts positioned on two sides of the limiting block, the limiting block is provided with a groove formed by downward sinking from the top surface of the limiting block, the groove comprises two groove walls which are oppositely arranged, and the rod piece is arranged in the through groove in a penetrating manner and the end parts of the rod piece are respectively arranged on the two groove walls.

Furthermore, the through groove comprises a first part and a second part which are connected with each other, the first part is a circular arc through hole, the second part is a long strip-shaped through groove, and the diameter of the first part is larger than the width of the second part.

Further, the cutting knife also comprises a base part extending from the knife edge part, and the base part is provided with a circular arc corner part; in an initial state, the arc-shaped corner is positioned outside the nail bin body.

Further, the staple cartridge body comprises an insertion end and a tail end; in an initial state, the cutting knife and the pusher are located at the distal end of the staple cartridge body.

The invention also provides a surgical instrument which comprises a rod body assembly and an end effector arranged at one end of the rod body assembly, wherein the end effector comprises a nail bin seat and a nail abutting seat which is pivotally connected with the nail bin seat, a nail bin assembly is detachably arranged in the nail bin seat, the rod body assembly comprises a knife pushing piece, one part of the knife pushing piece is positioned in the end effector, and the nail bin assembly is the nail bin assembly as described in any one of the above items.

Further, the push broach piece comprises a main body portion and an additional portion extending from the front side face of the main body portion, the main body portion is provided with a first concave portion formed by inwards recessing from the front side face, an opening of the first concave portion is arranged towards the direction of the additional portion, the inner wall face of the first concave portion is an arc face, and the additional portion is provided with a second concave portion formed by recessing downwards from the top face of the additional portion.

The invention has the beneficial effects that: the cutting knife is rotatably connected with the pusher, and in an initial (unused) state or a cutting completion state, the cutting edge of the knife edge part is positioned in the groove and faces downwards, so that the cutting knife cannot be exposed and further cannot damage tissues of a patient and a doctor.

Drawings

FIG. 1 is a schematic view of the end effector and pusher-knife assembly of the stapler of the present invention;

FIG. 2 is an exploded perspective view of the end effector and knife pusher member of FIG. 1;

FIG. 3 is an enlarged view of the circled portion shown in FIG. 2;

FIG. 4 is an exploded perspective view of the cartridge assembly and knife pusher of FIG. 2;

FIG. 5 is an enlarged view of the circled portion shown in FIG. 4;

FIG. 6 is a schematic view of the pusher, cutter, rod and pusher member shown in FIG. 4;

FIG. 7 is an enlarged view of the circled portion shown in FIG. 6;

FIG. 8 is an exploded perspective view of the pusher, cutting blade, rod and pusher member of FIG. 6;

fig. 9 is an enlarged view of the circled portion shown in fig. 8.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The meaning of "a number" is at least one.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1-2, the present invention discloses a stapler (not shown) including a handle assembly, a shaft assembly extending from the handle assembly, and an end effector 100 disposed at one end of the shaft assembly. The handle component comprises a body and a transmission mechanism arranged on the body, the transmission mechanism is connected with the rod body component, and the transmission mechanism drives the rod body component to move forwards or backwards. The end effector 100 comprises a staple cartridge seat 10 and a staple abutting seat 20 pivotally connected to the staple cartridge seat 10, the staple cartridge assembly 30 can be clamped in the staple cartridge seat 10 and can also be taken out from the staple cartridge seat 10, that is, the staple cartridge assembly 30 is detachably mounted on the staple cartridge seat 10, and the staple cartridge assembly 30 comprises a staple cartridge 40 and a cutting knife 50. The shaft assembly includes a pusher member 60, a portion of the pusher member 60 being located within the end effector 100, the pusher member 60 being adapted to move the cutting blade 50 forward or backward. As used herein, the terms "forward" and "rearward" are relative to a clinician manipulating the handle assembly of stapler 100, the term "rearward" referring to a direction closer to the clinician, the term "forward" referring to a direction away from the clinician; as used herein, the term "longitudinal direction" refers to the direction extending between the front and back, and the term "transverse direction" refers to the direction perpendicular to the longitudinal direction; the terms "upper" and "lower" are used herein in a relative sense, i.e., "anvil seat 20" is "upper" and "cartridge seat 10" is "lower". The term "disposed" is used throughout to denote a connection or positional relationship between two components.

Referring to fig. 3 to 5, the magazine 40 includes staples (not shown) and a pusher (not shown), a magazine body 41 extending in the longitudinal direction, a pusher 42 attached to the magazine body 41, and a bracket 43, and the bracket 43 movably attaches the pusher 42 to the magazine body 41. The cutting blade 50 is rotatably connected to the pusher 42. The cartridge body 41 is provided with a plurality of staple cavities (not numbered), a part of the staple pusher and the staples are arranged in the staple cavities, and the pusher 42 drives the staple pusher to move, and the staple pusher pushes the staples out. When magazine 40 is not in use, a cover (not shown) is attached to magazine 40 to prevent dust from entering magazine 40. The cartridge body 41 is provided with a knife slot 410 along the longitudinal direction, and the knife slot 410 is used for the cutting knife 50 to travel in. The cartridge body 41 includes an insertion end 411 and a distal end 412, and in the initial state, the cutting knife 50 and the pusher 42 are both disposed at the distal end 412 of the cartridge body 41. The pusher member 60 is adapted to push against the cutting blade 50 and the pusher 42, and the pusher 42 pushes against the pusher member, which pushes staples out of the staple cavities. The initial state is when the cartridge assembly 30 is not installed into the end effector 100.

As shown in fig. 6 to 9, the cutting blade 50 includes a blade portion 51 and a base portion 52 extending from the blade portion 51, the blade portion 51 has a cutting edge 510 for cutting tissue, and the base portion 52 has a circular arc corner 521. In the initial state, or after cutting tissue, cutting edge 510 is positioned within knife slot 410 and facing downward, and cutting edge 510 is not positioned above (i.e., not exposed to) the top surface of cartridge body 41. In the initial state, the base portion 52 protrudes beyond the rear end surface of the cartridge body 41, that is, the rounded corner 521 is located outside the cartridge body 41. The blade part 51 is provided with a through groove 53, the through groove 53 comprises a first part 54 and a second part 55 which are connected with each other, the first part 54 is a circular arc through hole, the second part 55 is a long strip-shaped through groove, and the diameter of the first part 54 is larger than the width of the second part 55. The pusher 42 includes a limiting block 421 and two pushing portions 422 respectively located at two sides of the limiting block 421, the limiting block 421 is located in the knife slot 410, the limiting block 421 is provided with a groove 423 formed by sinking downward from a top surface thereof, each pushing portion 422 includes two pushing blocks 426 arranged in parallel, and the pushing blocks 426 are used for pushing the nail pushing member. In the initial state or the cutting-completed state, a portion of the blade part 51 is located in the groove 423, that is, the cutting edge 510 is located in the groove 423 and faces the bottom of the groove 423, so that the cutting edge 510 faces downward without being exposed as shown in fig. 5 and 6, and thus the tissue is not damaged. The recess 423 has two opposite groove walls 424, the two groove walls 424 are respectively provided with a receiving hole 425, the cartridge module 30 further includes a rod member 70, the rod member 70 is disposed through the first portion 54 of the through groove 53 and the ends of the rod member 70 are respectively mounted in the receiving holes 425 of the two groove walls 424, when the rod member 70 is located in the first portion 54 of the through groove 53, the cutting knife 50 can rotate around the rod member 70 along a first direction or a second direction, and the first direction is opposite to the second direction. The push-type broach element 60 includes a main body portion 61 and an additional portion 62 extending from a front side surface of the main body portion 61, the main body portion 61 is provided with a first concave portion 63 formed by being recessed inward from the front side surface thereof, an opening of the first concave portion 63 is provided toward the additional portion 62, an inner wall surface of the first concave portion 63 is an arc surface, and the additional portion 62 is provided with a second concave portion 64 formed by being recessed downward from a top surface thereof.

When the nail bin assembly 30 is used, firstly, the cover body on the nail bin 40 is removed, and then the nail bin assembly 30 in the initial state is installed into the nail bin base 10, specifically, the nail bin assembly 30 is installed into the nail bin base 10 by firstly installing the rear end of the nail bin assembly 30 in an inclined downward direction, and then the rear end of the nail bin assembly 30 is used as a pivot shaft, and the rest part of the nail bin assembly 30 is installed into the nail bin base 10 in a pivot mode. When the cartridge assembly 30 is installed in the cartridge seat 10, the circular arc corner 521 of the base 52 of the cutter 50 abuts against the first recess 63 of the body 61 of the pusher 60, during the pivotal fitting, the circular arc-shaped corner 521 slides on the inner wall surface of the first recess 63, under the guiding action of the first concave part 63, the circular arc corner 521 slides from the upper end of the first concave part 63 to the lower end of the first concave part 63, in the process, the cutting knife 50 rotates around the rod member 70 along the first direction, after rotating 90 degrees, the cutting edge 510 of the knife edge part 51 is positioned above the knife slot 410 and the cutting edge 510 faces the insertion end 411 of the cartridge body 41, the base part 52 of the cutting knife 50 falls into the second concave part 64, at this time, the main body part 61 of the push knife member 60 pushes the base part 52 of the cutting knife 50 forward, the cutting blade 50 is moved forward, and the cutting blade 50 moves forward so that the rod member 70 is located at the first end 531 to the second end 532 of the through slot 53. When the rod 70 is moved from the first end 531 to the second end 532 of the through slot 53, the main body 61 of the push blade 60 abuts against the base 52 of the cutting blade 50 and the stop block 421 of the pusher 42, and the additional part 62 of the push blade 60 also abuts against the pusher 42, at this time, the main body 61 of the push blade 60 continues to push the base 52 of the cutting blade 50 and the stop block 421 of the pusher 42 forward, the additional part 62 pushes the pusher 42 forward, the pusher 42 and the cutting blade 50 move forward at the same time, and the cutting edge 510 of the blade part 51 cuts tissue in the process of advancing forward. When the cutting knife 50 moves from the end 412 of the cartridge body 41 to the insertion end 411 of the cartridge body 41, the cutting of the tissue is completed. Due to the friction between the pusher 42 and the cartridge body 41, if the pusher 42 needs to be moved, a sufficient force needs to be applied to the pusher 42. After the tissue is cut, the knife pushing element 60 is moved backward, and since the base portion 52 of the cutting knife 50 is located in the second recess 64 of the additional portion 62 of the knife pushing element 60, the additional portion 62 drives the cutting knife 50 to move backward, and during the backward movement of the cutting knife 50, the position of the rod member 70 is returned from the second end 532 to the first end 531 of the through slot 53, that is, the rod member 70 is returned to the first portion 54 of the through slot 53. The pushing blade 60 continues to move rearward, the pushing blade 60 applies a rearward force to the cutting blade 50, the cutting blade 50 applies a rearward force to the pusher 42, due to the friction between the pusher 42 and the cartridge body 41, this force cannot pull the pusher 42 backwards, and this force causes the rounded corner 521 of the base 52 of the cutting blade 50 to slide from the lower end of the first recess 63 to the upper end of the first recess 63, during this process, the cutting blade 50 is rotated 90 ° about the rod 70 in a second direction, opposite to the first direction, and after the rotation, the cutting edge 510 is located in the groove 423 and faces the bottom of the groove 423, and at this time, the base 52 of the cutting blade 50 is disengaged from the second recess 64 of the attachment portion 62, and the cutting blade 50 and the pusher 42 are not carried rearward by the pushing blade 60 during the further rearward movement, i.e. the cutting blade 50 and the pusher 42 remain at the insertion end 411 of the cartridge body 41.

In summary, when the cartridge module 30 is in the initial (non-use) state, the cutting edge 510 of the knife portion 51 of the cutting knife 50 is located in the groove 423 of the stop block 421 of the pusher 42 and faces the bottom of the groove 423, and the cutting edge 510 of the knife portion 51 is not damaged by foreign objects; when the nail bin assembly 30 is installed in the nail bin seat 10, the cutting edge 510 of the knife edge part 51 rotates to the upper part of the knife slot 410 relative to the limiting block 421; during the travel of the cutting blade 50 within the blade slot 410, the cutting edge 510 of the blade portion 51 cuts tissue; after the tissue is cut, the knife edge part 51 rotates relative to the stopper 421 until the cutting edge 510 of the knife edge part 51 is located in the groove 423 of the stopper 421 and faces the bottom of the groove 423. In the present invention, the cutting edge 510 of the blade section 51 does not damage the patient tissue, nor is it damaged by foreign objects, regardless of whether the cutting blade 50 is in the initial (unused) state or the cut-off state, nor does it damage the doctor when the doctor replaces the magazine.

Although the embodiment of the present invention has been shown and described, it is understood that the above embodiment is illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiment without departing from the scope of the present invention, and all such changes, modifications, substitutions and alterations are intended to be within the scope of the present invention.

Claims

1. A staple cartridge assembly for a surgical instrument comprises a staple cartridge and a cutting knife; the nail bin comprises a suturing nail, a nail pushing piece and a nail bin body extending along the longitudinal direction, the nail bin body is provided with a nail sewing cavity, the suturing nail is contained in the nail sewing cavity, and the nail pushing piece is used for pushing the suturing nail out of the nail sewing cavity; the nail cabin also comprises a pusher used for pushing the nail pushing piece; the cutting knife comprises a knife edge part, and the knife edge part is provided with a cutting edge; the method is characterized in that: the cutting knife is rotatably connected with the pusher, and the cutting edge is not exposed above the top surface of the nail bin body in the initial state or the cutting completion state.

2. The staple cartridge assembly for a surgical instrument of claim 1, wherein: the nail bin body is provided with a knife slot extending along the longitudinal direction; the pusher comprises a limiting block and abutting parts positioned on two sides of the limiting block, the limiting block is positioned in the cutter slot, and the cutting cutter is rotatably connected to the limiting block.

3. The staple cartridge assembly for a surgical instrument of claim 2, wherein: the limiting block is provided with a groove formed by downwards sinking from the top surface of the limiting block, and the cutting edge is positioned in the groove in an initial state or a cutting completion state.

4. The staple cartridge assembly for a surgical instrument of any one of claims 1 to 3, wherein: the nail bin assembly further comprises a rod piece arranged on the pusher, the cutting knife is provided with a through groove, and the rod piece penetrates through the through groove.

5. The staple cartridge assembly for a surgical instrument of claim 4, wherein: the pusher comprises a limiting block and abutting parts positioned on two sides of the limiting block, the limiting block is provided with a groove formed by downward sinking from the top surface of the limiting block, the groove comprises two groove walls which are oppositely arranged, and the rod piece is arranged in the through groove in a penetrating manner and the end parts of the rod piece are respectively arranged on the two groove walls.

6. The staple cartridge assembly for a surgical instrument of any one of claims 4, 5, wherein: the through groove comprises a first part and a second part which are connected with each other, the first part is a circular arc through hole, the second part is a long strip-shaped through groove, and the diameter of the first part is larger than the width of the second part.

7. The staple cartridge assembly for a surgical instrument of claim 1, wherein: the cutting knife further comprises a base part extending from the knife edge part, and the base part is provided with a circular arc-shaped corner part; in an initial state, the arc-shaped corner is positioned outside the nail bin body.

8. The staple cartridge assembly for a surgical instrument of claim 1, wherein: the staple cartridge body comprises an insertion end and a tail end; in an initial state, the cutting knife and the pusher are located at the distal end of the staple cartridge body.

9. A surgical instrument comprises a rod body assembly and an end effector arranged at one end of the rod body assembly, wherein the end effector comprises a nail bin seat and a nail abutting seat which is pivotally connected to the nail bin seat, a nail bin assembly is detachably arranged in the nail bin seat, the rod body assembly comprises a knife pushing piece, and one part of the knife pushing piece is positioned in the end effector, and the surgical instrument is characterized in that: the staple cartridge assembly of any one of claims 1-8.

10. The surgical instrument of claim 9, wherein: the push cutter piece comprises a main body part and an additional part extending from the front side face of the main body part, the main body part is provided with a first concave part formed by inwards sinking from the front side face, the opening of the first concave part is arranged towards the direction of the additional part, the inner wall face of the first concave part is an arc face, and the additional part is provided with a second concave part formed by downwards sinking from the top face of the additional part.