CN209751136U - Nail bin assembly for surgical instrument and surgical instrument - Google Patents

Abstract

The utility model discloses a nail bin assembly for surgical instruments, which comprises a nail bin, wherein the nail bin is provided with a nail bin body, the nail bin body is provided with a knife slot, the nail bin body comprises an inserting end and a tail end, the nail bin assembly also comprises a cutting knife and a limiting part which are arranged at the tail end of the nail bin body, the limiting part is pivotally connected with the nail bin body and is contained in the nail bin body, the limiting part comprises a limiting body and a torsional spring which is arranged on the limiting body, and the limiting body comprises a main body part and an extending part which extends from; when the cutting knife is in an unused state, the main body part and the cutting knife are clamped to prevent the cutting knife from producing unexpected movement, after the cutting knife is used and moves, the movement of the cutting knife enables the cutting knife to be separated from the clamping of the main body part, and the torsion spring enables the main body part to rotate to the upper side of the nail bin body. The utility model discloses a main part of spacing body finishes at the cutting knife and replies when initial position to be used for protecting the cutting knife.

Description

nail bin assembly for surgical instrument and surgical instrument

Technical Field

the utility model relates to a nail storehouse subassembly and surgical instrument for surgical instrument.

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 may be adapted to be inserted into a patient to staple and/or cut tissue, and that may 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 provided for the cutting knife to be mounted therein and movable along the knife slot. When the cutting knife cuts the tissue, the stitching nails in the nail box body stitch the tissue. The cutting knife comprises a base part and a knife edge part extending from the base part, the base part is positioned in the knife slot and moves along the knife slot, the knife edge part is positioned above the nail bin body and is used for cutting tissues, and when the knife edge part retracts to the initial position, the knife edge part is easily damaged by foreign objects.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can prevent that the cutting knife is by the nail storehouse subassembly for surgical instrument of foreign object damage.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a nail bin assembly for a surgical instrument comprises a nail bin, wherein the nail bin is provided with a sewing nail, a nail pushing piece and a nail bin body extending along the longitudinal direction, the nail bin body is provided with a nail cavity, the sewing nail is contained in the nail cavity, and the nail pushing piece is used for pushing the sewing nail out of the nail cavity; the nail bin assembly comprises a nail bin body, a cutter slot, a cutting knife, a limiting piece, a torsion spring and a clamping piece, wherein the nail bin body is provided with a knife slot extending along the longitudinal direction, the nail bin body comprises an insertion end and a tail end, the cutting knife and the limiting piece are arranged at the tail end of the nail bin body, the limiting piece is pivotally connected to the nail bin body and contained in the nail bin body, the limiting piece comprises a limiting body and the torsion spring installed on the limiting body, and the limiting body comprises a main body part and an extending part; when the cutting knife is not used, the main body part is clamped with the cutting knife to prevent the cutting knife from generating unexpected movement, after the cutting knife is used and moves, the movement of the cutting knife enables the cutting knife to be separated from the clamping with the main body part, and the torsion spring enables the main body part to rotate to the upper part of the nail bin body.

Furthermore, the nail bin also comprises a pusher arranged at the bottom of the nail bin body, the cutting knife pushes against the pusher, and the pusher pushes against the nail pushing piece.

Furthermore, the pusher comprises a limiting block and two abutting parts positioned on two sides of the limiting block, each abutting part comprises two abutting blocks arranged in parallel, each abutting block abuts against and pushes the nail pushing piece, and the limiting block is positioned in the cutter slot.

Further, the cutting knife comprises a base part and a knife edge part, and the base part pushes against the pusher.

furthermore, the cutting knife further comprises an additional part connecting the base part and the blade part, the additional part is provided with a second clamping part, the limiting part is provided with a first clamping part, and the first clamping part is clamped with the second clamping part.

Further, the first engaging portion is a protrusion, and the second engaging portion is a hole.

Further, the limiting body comprises a convex column, the torsion spring is wound on the convex column, and the convex column is pivotally connected to the nail bin body.

Further, the main body portion is provided with the projection.

Further, the protruding column protrudes from the extending portion.

Further, the knife slot divides the nail bin body into two side parts, namely a first side part and a second side part, and the cutting knife is positioned between the first side part and the second side part; the number of the limiting parts is two, the two limiting parts are respectively a first limiting part and a second limiting part, the first limiting part is pivotally connected to the first side part, and the second limiting part is pivotally connected to the second side part.

Furthermore, the two side portions are provided with accommodating spaces formed by downwards sinking from top end faces of the two side portions, and each limiting piece is accommodated in one of the accommodating spaces respectively.

furthermore, the convex column comprises a first convex column protruding from one side surface of the extension part and a second convex column protruding from the other side surface of the extension part, and the torsion spring is wound on the first convex column; the nail bin body is divided into two side portions by the knife slot, the two side portions are respectively provided with an accommodating space formed by downward sinking from the top end surface of the two side portions, the accommodating space is provided with two side walls in the transverse direction perpendicular to the longitudinal direction, the two side walls are respectively provided with a first accommodating hole and a second accommodating hole, the first protruding column is accommodated in the first accommodating hole, and the second protruding column is accommodated in the second accommodating hole.

The utility model also provides a surgical instrument, it include the nail storehouse seat and install in nail storehouse subassembly in the nail storehouse seat, the nail storehouse subassembly is used for the cutting and sews up the tissue, the nail storehouse subassembly be as above arbitrary nail storehouse subassembly.

The utility model has the advantages that: the utility model discloses a main part of spacing body can order about rotatory top to the nail storehouse body by the torsional spring, finishes at the cutting knife and replies when initial position, and the main part is used for protecting the cutting edge portion of cutting knife, prevents that cutting edge portion from being damaged by the foreign object.

Drawings

Fig. 1 is a schematic structural view of the nail cartridge assembly of the present invention;

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

FIG. 3 is a partially assembled view of the staple cartridge assembly shown in FIG. 2;

FIG. 4 is an enlarged view of the circled portion shown in FIG. 3;

FIG. 5 is an exploded perspective view of FIG. 4;

FIG. 6 is a schematic structural view of the cutting blade, the limiting member and the pusher shown in FIG. 5;

FIG. 7 is a schematic structural view of the cutting blade and the limiting member shown in FIG. 6;

FIG. 8 is an exploded perspective view of the cutting blade and the limiting member shown in FIG. 7;

FIG. 9 is a schematic view of the cutting blade shown in FIG. 4 returning to its initial position after completion of its operation;

FIG. 10 is an exploded perspective view of FIG. 9;

FIG. 11 is a schematic view of the cutting blade, the limiting member and the pusher shown in FIG. 10;

FIG. 12 is a schematic view of the cover shown in FIG. 2;

FIG. 13 is a schematic structural view of the first staple pusher of FIG. 2;

FIG. 14 is a schematic structural view of the second staple pusher of FIG. 2;

FIG. 15 is a schematic view of the structure of the staple, staple pusher and pusher of FIG. 2.

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 exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The prior art surgical instrument includes a handle portion, a shaft assembly disposed on the handle portion, an end effector disposed on the shaft assembly, and a cartridge assembly mounted within the end effector.

As shown in fig. 1 to 15, the present invention discloses a nail cartridge assembly, which comprises a nail cartridge 10, a cutting knife 6 and a pair of limiting members 7, wherein the cutting knife 6 and the pair of limiting members 7 are mounted on the nail cartridge 10, and the pair of limiting members 7 comprises a first limiting member 71 and a second limiting member 72. The cartridge 10 includes a cartridge body 1 extending in a longitudinal direction, and a pusher 4 and a bracket 5 mounted at a bottom of the cartridge body 1, wherein the pusher 4 is located between the cartridge body 1 and the bracket 5. The nail bin body 1 is provided with a plurality of nail sewing cavities 13, a part of the nail pushing piece 3 and the sewing nails 2 are arranged in the nail sewing cavities 13, the pusher 4 drives the nail pushing piece 3 to move, and the nail pushing piece 3 pushes the sewing nails 2 to be ejected out. When the magazine 10 is not used, the cover 20 covers the magazine 10, thereby preventing dust and the like from entering the magazine 10. The cover 20 includes a cover 201, and a hook 202 and a positioning ridge 203 extending downward from the cover 201, the hook 202 is formed by extending downward from a side of the cover 201, and when the magazine 10 is mounted on an end effector (not shown) of a surgical instrument, the cover 20 needs to be removed and mounted. The magazine body 1 is provided with a knife slot 16 extending along the longitudinal direction, and the knife slot 16 divides the magazine body 1 into two side portions 17, namely a first side portion 171 and a second side portion 172. The first limiting member 71 is pivotally connected to the first side portion 171, and the second limiting member 72 is pivotally connected to the second side portion 172. The cartridge body 1 includes a top end face 14 and a bottom end face 15, and a knife slot 16 vertically penetrates the top end face 14 and the bottom end face 15. The cartridge body 1 includes an insertion end 11 and a distal end 12 in the longitudinal direction, the insertion end 11 being the end that is first advanced with the end effector into the tissue being stapled relative to the distal end 12, the insertion end 11 being located at the leading end of the end effector and the distal end 12 being located at the end of the end effector that is adjacent to the shaft assembly of the surgical instrument when the cartridge 10 is installed in the end effector. The cutting knife 6 and the pair of stoppers 7 are mounted at the tail end 12 of the cartridge body 1. The cartridge body 1 is provided with a staple outlet 130 formed by a staple cavity 13 penetrating through the top end surface 14, the staple cavity 13 also penetrates through the bottom end surface 15 of the cartridge body 1, and the bottom end surface 15 is provided with a sliding channel (not shown) extending along the longitudinal direction of the cartridge body 1.

Referring to fig. 13 to 15, the staple 2 has a fixing rod 21 and an extension rod 22 formed by extending upward from both ends of the fixing rod 21, and the fixing rod 21 is disposed on the staple pusher 3. When the staple 2 is in the initial state (not removed), the top end of the extension rod 22 of the staple 2 is lower than the top end face 14 of the cartridge body 1, or the top end of the extension rod 22 of the staple 2 is flush with the top end face 14 of the cartridge body 1, so that stapling is facilitated. If the top end of the staple 2 is higher than the top end face 14 of the cartridge body 1, the staple cannot be sewn and the staple forming is not facilitated, because when the end effector is inserted into the tissue to be sewn and the top end of the staple 2 is higher than the top end face 14, the staple 2 contacts the tissue to be sewn to generate friction, and the staple 2 is dislocated with the tissue to be sewn, so the staple forming is not facilitated.

each staple cavity 13 houses a staple pusher 3, the staple pusher 3 comprising a support 31 and a guide 32 integral with the support 31. Two sides of the supporting portion 31 are protruded upwards to form extending blocks 33, the extending blocks 33 and the supporting portion 31 are surrounded to form a limiting groove 34, and the limiting groove 34 is used for accommodating the fixing rod 21 of the stitching nail 2. The pusher 4 includes a limiting block 41 and two pushing portions 42 located at two sides of the limiting block 41, each pushing portion 42 includes two pushing blocks 43 arranged in parallel, and each pushing block 43 is used for pushing the nail pushing member 3. The pushing block 43 is located in the sliding channel of the nail bin body 1 and can move relative to the sliding channel. A stop block 41 is defined within the knife slot 16 to prevent the pusher 4 from deviating from the direction of movement or rattling as the pusher 4 moves relative to the cartridge body 1. The guide part 32 is matched with the pushing block 43, the guide part 32 is located in the sliding channel, when the pusher 4 drives the staple pushing piece 3 to move, the pushing block 43 is contacted with the guide part 32, the guide part 32 is pushed to move, and because the extending block 33 of the staple pushing piece 3 is arranged in the staple cavity 13, the staple cavity 13 limits the extending block 33 and further limits the staple pushing piece 3 to move up and down only relative to the staple cartridge body 1, so when the pushing block 43 applies acting force to the guide part 32, the guide part 32 can only move up relative to the staple cartridge body 1, at the moment, the supporting part 31 moves up relative to the staple cartridge body 1 along with the guide part 32, thereby pushing the staple 2 to move up relative to the staple cartridge body 1, and staple ejection is realized. In the present embodiment, the staple pusher 3 comprises two different structures (see fig. 13 and 14 in detail), the specific structures of which are not described in detail here. The staple pusher 3 is supported by a carrier 5 to prevent the staple pusher 3 from disengaging from the cartridge body 1. The cartridge body 1 includes two sides extending in the longitudinal direction, and each side is provided with a catching groove 173, a catching groove 174, and a catching block 175. The positioning ridge 203 of the cover body 20 can be inserted into the knife slot 16, and the hook portion 202 is snap-fitted with the snap groove 173 to fix the cover body 20 and the cartridge body 1. The bracket 5 is provided with a groove 51 matched with the clamping block 175 and a hook 52 matched with the clamping groove 174. The bracket 5 is used for fixing the pusher 4 to prevent the pusher 4 from being separated from the cartridge body 1.

referring to fig. 5, the cutting blade 6 and the pusher 4 are abutted against each other, and the cutting blade 6 moves forward to drive the pusher 4 to move forward. The cutting blade 6 includes a base portion 61, an additional portion 62 extending upward from the base portion 61, and a blade portion 63 extending upward from the additional portion 62. The base portion 61 is stepped, the base portion 61 being located below the knife slot 16, the attachment portion 62 being located within the knife slot 16 and movable along the knife slot 16, and the knife edge portion 63 being located above the knife slot 16. When the additional part 62 moves in the knife slot 16, the knife edge part 63 cuts the tissue, the base part 61 pushes the pusher 4 to move, so that the pusher 4 drives the staple pusher 3 to move, the cutting knife 6 cuts the tissue, and the pusher 4 can timely abut against the staple pusher 3, so that the suturing nail 2 can timely suture the tissue to be sutured, the tissue is ensured to be cut and sutured simultaneously, tissue fluid is prevented from flowing into the knife slot 16 from the incision, and the incision healing is facilitated.

Referring to fig. 6 to 8, the first limiting member 71 is mounted on the first side portion 171, the second limiting member 72 is mounted on the second side portion 172, the additional portion 62 of the cutting blade 6 is located in the blade slot 16, and the first limiting member 71 and the second limiting member 72 are located on two sides of the additional portion 62 of the cutting blade 6. The stopper 7 includes a stopper body 73 and a torsion spring 74 mounted on the stopper body 73. The stopper 73 includes a main body 75 and an extension 76 extending from the main body 75. The main body 75 has a first engaging portion 751 extending convexly in a direction toward the additional portion 62, the first engaging portion 751 is a protrusion, the additional portion 62 is correspondingly provided with a second engaging portion 621, the second engaging portion 621 is a hole, and the first engaging portion 751 is engaged with the corresponding second engaging portion 621 to prevent the cutting blade 6 from moving in the standby state. The stopper 7 further includes a first protrusion 77 protruding from one side surface of the extension portion 76 and a second protrusion 78 protruding from the other side surface of the extension portion 76, and the torsion spring 74 is wound around the first protrusion 77. Both side portions 17 are provided with a housing space 170 formed by being recessed downward from the top end surface 14 of the magazine body 1, and the extension portion 76 is housed in the housing space 170. The receiving space 170 of each side portion 17 has two side walls in a transverse direction perpendicular to the longitudinal direction, the two side walls are respectively provided with a first receiving hole 18 and a second receiving hole 19, the first protruding column 77 is received in the first receiving hole 18, and the second protruding column 78 is received in the second receiving hole 19. The first protrusion 77 can rotate in the first receiving hole 18, and the second protrusion 78 can rotate in the second receiving hole 19. When the cutting blade 6 is in a use state, that is, when the additional portion 62 of the cutting blade 6 moves forward along the blade slot 16, the second engaging portion 621 disengages from the first engaging portion 751 due to the movement of the additional portion 62, the main body portion 75 of the stopper 73 rotates upward under the action of the torsion spring 74, and after the rotation, the main body portion 75 is located above the magazine body 1. The spacing of spacing body 73 need not extra intervention to the spacing release of cutting knife 6, and the removal of cutting knife 6 can remove spacing to it of spacing body 73.

In summary, when the cutting blade 6 is in the standby state, the main body portion 75 of the stopper 73 is accommodated in the magazine body 1 and located on two sides of the additional portion 62 of the cutting blade 6, and the main body portion 75 and the additional portion 62 are engaged with each other through the first engaging portion 751 and the second engaging portion 621 to prevent the cutting blade 6 from undesired movement; when the cutting knife 6 moves in the knife slot 16, the cutting knife 6 pushes the pusher 4, the pusher 4 pushes the nail pushing piece 3, and the nail pushing piece 3 pushes the suturing nails 2, so that the tissue cutting and suturing are carried out simultaneously, tissue fluid is prevented from flowing into the knife slot 16 from an incision, and the incision healing is facilitated; when the cutting blade 6 returns to the initial position after the operation, the main body 75 of the stopper 7 is positioned on both sides of the blade portion 63, thereby preventing the blade portion 63 from being damaged by foreign objects.

Although the embodiment of the present invention has been shown and described, it is understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and variations to the above embodiment within the scope of the present invention, and all such changes, modifications, substitutions and variations are within the scope of the present invention.

Claims (13)

1. A nail bin assembly for a surgical instrument comprises a nail bin, wherein the nail bin is provided with a sewing nail, a nail pushing piece and a nail bin body extending along the longitudinal direction, the nail bin body is provided with a nail cavity, the sewing nail is contained in the nail cavity, and the nail pushing piece is used for pushing the sewing nail out of the nail cavity; the edge is seted up to the nail storehouse body the sword slot that the lengthwise direction extends, the nail storehouse body is including inserting end and end, its characterized in that: the nail bin assembly further comprises a cutting knife and a limiting piece which are arranged at the tail end of the nail bin body, the limiting piece is pivotally connected to the nail bin body and contained in the nail bin body, the limiting piece comprises a limiting body and a torsion spring mounted on the limiting body, and the limiting body comprises a main body part and an extending part extending from the main body part; when the cutting knife is not used, the main body part is clamped with the cutting knife to prevent the cutting knife from generating unexpected movement, after the cutting knife is used and moves, the movement of the cutting knife enables the cutting knife to be separated from the clamping with the main body part, and the torsion spring enables the main body part to rotate to the upper part of the nail bin body.

2. the staple cartridge assembly for a surgical instrument of claim 1, wherein: the nail bin also comprises a pusher arranged at the bottom of the nail bin body, the cutting knife pushes against the pusher, and the pusher pushes against the nail pushing piece.

3. The staple cartridge assembly for a surgical instrument of claim 2, wherein: the pusher comprises a limiting block and two abutting parts positioned on two sides of the limiting block, each abutting part comprises two abutting blocks arranged in parallel, each abutting block abuts against and pushes the nail pushing piece, and the limiting block is positioned in the cutter slot.

4. the staple cartridge assembly for a surgical instrument of claim 2, wherein: the cutting knife comprises a base part and a knife edge part, and the base part pushes the pusher.

5. The staple cartridge assembly for a surgical instrument of claim 4, wherein: the cutting knife further comprises an additional part which is connected with the base part and the knife edge part, a second clamping part is arranged on the additional part, a first clamping part is arranged on the limiting part, and the first clamping part is clamped with the second clamping part.

6. The staple cartridge assembly for a surgical instrument of claim 5, wherein: the first clamping part is a bump, and the second clamping part is a hole.

7. the staple cartridge assembly for a surgical instrument of claim 1, wherein: the limiting body comprises a convex column, the torsion spring is wound on the convex column, and the convex column is pivotally connected with the nail bin body.

8. The staple cartridge assembly for a surgical instrument of claim 6, wherein: the main body part is provided with the projection.

9. The staple cartridge assembly for a surgical instrument of claim 7, wherein: the convex column protrudes from the extension part.

10. The staple cartridge assembly for a surgical instrument of claim 1, wherein: the cutter slot divides the nail bin body into two side parts, namely a first side part and a second side part, and the cutter is positioned between the first side part and the second side part; the number of the limiting parts is two, the two limiting parts are respectively a first limiting part and a second limiting part, the first limiting part is pivotally connected to the first side part, and the second limiting part is pivotally connected to the second side part.

11. The staple cartridge assembly for a surgical instrument of claim 10, wherein: the two side parts are provided with accommodating spaces formed by downwards sinking from top end surfaces of the two side parts, and each limiting part is accommodated in one of the accommodating spaces respectively.

12. The staple cartridge assembly for a surgical instrument of claim 9, wherein: the convex columns comprise a first convex column protruding from one side surface of the extension part and a second convex column protruding from the other side surface of the extension part, and the torsion spring is wound on the first convex column; the nail bin body is divided into two side portions by the knife slot, the two side portions are respectively provided with an accommodating space formed by downward sinking from the top end surface of the two side portions, the accommodating space is provided with two side walls in the transverse direction perpendicular to the longitudinal direction, the two side walls are respectively provided with a first accommodating hole and a second accommodating hole, the first protruding column is accommodated in the first accommodating hole, and the second protruding column is accommodated in the second accommodating hole.

13. A surgical instrument comprising a cartridge seat and a cartridge assembly mounted within the cartridge seat for cutting and stapling tissue, characterized in that: the staple cartridge assembly of any one of claims 1-12.