CN217118498U - Jaw assembly and surgical instrument - Google Patents

Abstract

The utility model discloses a subassembly and surgical instrument of keeping silent. The jaw assembly comprises a nail bin seat and a nail abutting seat which is pivotally connected with the nail bin seat; the nail bin seat is used for installing the nail bin assembly, the nail abutting seat is provided with an opening position and a closing position and selectively moves between the opening position and the closing position, the nail abutting seat is provided with a nail abutting surface and a nail abutting seat groove, and the nail abutting seat groove is axially and uniformly divided into the nail abutting surfaces; the convex part has the recess of keeping away who is used for dodging not participating in anastomotic nail, and the recess of keeping away sets up in the convex part towards the one side of propping the nail seat groove, keeps away empty recess and props nail face intercommunication, has solved among the prior art anastomotic nail and has resulted in the unable problem of opening of keeping silent with the cutting knife card is dead easily.

Description

Jaw assembly and surgical instrument

Technical Field

The utility model relates to the technical field of medical equipment, especially relate to a subassembly and surgical instrument of keeping silent.

Background

The existing nail abutting seat is provided with a nail abutting surface and a nail abutting seat groove, the nail abutting seat groove is axially and evenly abutted to the nail abutting surface, a slope is arranged at the initial position where the cutting knife starts to cut, a plane for fixing the nail bin assembly is arranged below the slope, and thus a right-angled structure is formed, namely, an abrupt structure exists. If there is the anastomotic nail card in the inslot that supports the nail seat, especially a nail leg is at the upper surface of I-beam structure, and another nail leg is at the lower surface of I-beam structure, meets the right angle structure of sudden change and will appear the anastomotic nail card in the sudden change department of right angle structure when the back knife to die the cutting knife card and lead to the cutting knife to return motionless condition, the back knife can't return to initial position promptly, and then leads to keeping silent the subassembly and can't open. Accordingly, there is a need for improvements in the art that overcome the above-mentioned deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a keep silent subassembly and surgical instrument, solved among the prior art anastomotic nail and lead to keeping silent the unable problem of opening with the cutting knife card is dead easily.

The utility model discloses a following technical scheme realizes: a jaw assembly comprises a nail bin seat and a nail abutting seat which is pivotally connected with the nail bin seat; the nail bin seat is used for installing the nail bin assembly, the nail abutting seat is provided with an opening position and a closing position and selectively moves between the opening position and the closing position, the nail abutting seat is provided with a nail abutting surface and a nail abutting seat groove, and the nail abutting seat groove is axially and uniformly divided into the nail abutting surfaces; the convex part is provided with a clearance concave part for avoiding the anastomotic nail which does not participate in anastomosis, the clearance concave part is arranged on one side of the convex part facing the nail abutting seat groove, and the clearance concave part is communicated with the nail abutting surface.

Further, the clearance concave part comprises a guide surface and a clearance surface, and the guide surface and the clearance surface are arranged at an angle.

Furthermore, the guide surface is smoothly connected with the nail abutting surface.

Further, the guide surface is coplanar with the nail abutting surface.

Further, the distance between the guide surface and the nail abutting surface is reduced along the direction towards the far end, and the far end of the guide surface is communicated with the nail abutting surface.

Further, the guide surface is a plane or a concave surface.

Furthermore, the avoiding surface is a concave surface or a plane.

Further, the width of the guide surface is larger than the diameter of the staple.

Further, the width of the guide surface is more than 0.2mm and less than or equal to 0.92 mm.

The present application further provides a surgical instrument comprising a handle assembly, a shaft assembly extending axially distally from the handle assembly, and a jaw assembly as described above disposed at a distal end of the shaft assembly.

Compared with the prior art, the beneficial effects of the utility model reside in that: the convex part of the nail abutting seat is provided with the clearance concave part, the clearance concave part is arranged on one side of the convex part facing the nail abutting seat groove, and the clearance concave part is communicated with the nail abutting surface, so that when the anastomotic nail which does not participate in anastomosis appears in the nail abutting seat groove, the convex part can be smoothly passed through the clearance space formed by the clearance concave part, the anastomotic nail is prevented from being stopped by the convex part, the cutting knife is prevented from being stuck by the anastomotic nail which does not participate in anastomosis, and the cutting knife can not return to the initial position to cause the jaw assembly to be incapable of being opened.

Drawings

FIG. 1 is a schematic view of a jaw assembly according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a nail anvil in the prior art;

FIG. 3 is a cross-sectional view of a prior art staple captured on a staple holder;

FIG. 4 is a partial schematic structural view of an angle of the nail seat according to the embodiment of the present invention;

fig. 5 is an enlarged view of the layout at a in fig. 4;

FIG. 6 is a schematic structural view of another angle of the nail seat according to the embodiment of the present invention;

FIG. 7 is a schematic structural view of another angle of the nail seat according to the embodiment of the present invention;

fig. 8 is a schematic structural diagram of an anastomat provided by the embodiment of the invention.

Wherein the figures include the following reference numerals:

10. a nail magazine base; 20. a nail abutting seat; 21. a nail pushing surface; 22. a nail abutting seat groove; 23. a convex portion; 30. a staple cartridge assembly; 40. A clearance recess; 41. a guide surface; 42. an avoidance surface; 50. anastomosis nails; 60. a cutting assembly; 70. pushing the nail block; 80. A handle assembly; 90. a shaft assembly; 100. an end effector.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is to be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a stapler. The term "proximal" refers to the portion that is closer to the clinician, while the term "distal" refers to the portion that is further from the clinician. I.e., proximal to the end of the handle assembly 80 and distal to the end effector 100. However, staplers can be used in many orientations and positions, and thus these terms of expressing relative positional relationships are not intended to be limiting and absolute.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a movable connection, or an integral part; either directly or indirectly through intervening media, either internally or in any other relationship, such as abutment. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. It is to be noted that, when a definite term is used before "connected" or "connected", it has the meaning defined by the corresponding definite term, only excluding the case where it is obviously necessary to exclude, and not excluding other possible cases, for example, "detachably connected" means detachably connected, not integrally included, but movable connected, etc. are not excluded.

Fig. 1 is a schematic view of a prior art end effector, end effector 100 including a jaw assembly and a cartridge assembly 30, cartridge assembly 30 including a plurality of staple cavities for receiving staples 50, wherein the jaw assembly includes a staple holder 20 and a cartridge holder 10, cartridge holder 10 is configured to mount cartridge assembly 30, and cartridge holder 20 has an open position and a closed position and is selectively movable between the open position and the closed position. Fig. 2 to 3 are schematic structural views of a nail pushing seat in the prior art, in which the nail pushing seat 20 has a nail pushing surface 21 and a nail pushing seat groove 22, and the nail pushing seat groove 22 axially divides the nail pushing surface 21. The nail abutting seat 20 further comprises a convex portion 23, the convex portion 23 is convexly arranged at the proximal end of the nail abutting surface 21, and the bottom surface of the convex portion 23 abuts against the nail cartridge assembly 30 when the nail cartridge seat 10 is in the closed position. Under normal conditions, the staples 50 are pushed upwards to gradually separate from the staple cavities of the cartridge assembly 30, and after the staple tips penetrate through the target tissue to be sutured between the staple cartridge seat 10 and the staple abutting seat 20, the staple tips are pressed and bent after contacting with the staple forming grooves of the staple abutting seat 20, and form a specific shape along the staple forming grooves, thereby realizing the suturing of the tissue. However, when the staples 50 not participating in anastomosis are accidentally stuck in the staple abutting seat grooves 22 and move to the convex portions 23, since the convex portions 23 in the prior art have a sudden-change right-angle structure, the staples 50 not participating in anastomosis are stuck in the convex portions 23 and cannot smoothly slide out of the staple abutting seat grooves 22 towards the near side, so that the cutting knife of the cutting assembly 60 is stuck by the staples 50 when retreating, and the cutting knife cannot return to the initial position, so that the jaw assembly cannot be opened.

Referring to fig. 1, 4-5, to solve the above problem, the present embodiment provides a jaw assembly including a staple cartridge seat 10 and a staple abutting seat 20, wherein the staple cartridge seat 10 is used for mounting a staple cartridge assembly 30. Anvil 20 is pivotally connected to cartridge carrier 10, and anvil 20 has an open position and a closed position and is selectively movable between the open position and the closed position. The nail abutting seat 20 has a nail abutting surface 21 and a nail abutting seat groove 22, and the nail abutting seat groove 22 axially equally divides the nail abutting surface 21. The nail abutting seat 20 further comprises a convex portion 23, the convex portion 23 is convexly arranged at the proximal end of the nail abutting surface 21, and when the nail cartridge seat 10 is in the closed position, the convex portion 23 abuts against the nail cartridge assembly 30. Specifically, the bottom surface of the projection 23 abuts against the magazine assembly 30. The convex portion 23 has a clearance concave portion 40 for avoiding the staples 50 not involved in the anastomosis, the clearance concave portion 40 is provided on a side of the convex portion 23 facing the staple abutment groove 22, and the clearance concave portion 40 communicates with the staple abutment surface 21.

Through the arrangement, when the staples 50 which do not participate in anastomosis appear in the staple abutting seat grooves 22, the staples 50 which do not participate in anastomosis can smoothly pass through the avoidance space formed by the clearance concave part 40 to avoid being blocked by the convex part 23, so that the cutting knife is prevented from being blocked, and the situation that the cutting knife cannot return to the initial position to cause that the jaw assembly cannot be opened is avoided, as shown in fig. 6 to 7.

In the present embodiment, the clearance recess 40 is formed by cutting a portion of the convex portion 23 including a part of the bottom surface, a part of the side surface facing the nail seat groove 22 connected to the bottom surface, and a part of the side surface facing the distal end of the nail seat.

Referring to fig. 5, the clearance recess 40 includes a guide surface 41 and a clearance surface 42, and the guide surface 41 and the clearance surface 42 are disposed at an angle. Preferably, the guide surface 41 and the relief surface 42 are perpendicular to each other. Staples 50 are moved proximally by guide surface 41.

Referring to fig. 5, one wall of the clearance recess 40 serves as a guide surface 41. The guide surface 41 has an angle with the bottom surface of the protrusion 23, and the distance between the guide surface 41 and the bottom surface of the protrusion 23 decreases in the proximal direction. Preferably, the angle is acute. That is, the guide surface 41 is an inclined surface. The bottom surface of the projection 23 is a surface of the projection 23 facing the magazine base 10. Accordingly, the guide surface 41 is disposed at an angle to the nail abutment surface 21, the distance between the guide surface 41 and the nail abutment surface 21 decreases in the direction toward the distal end, and the distal end of the guide surface 41 communicates with the nail abutment surface 21. Distance in this context means vertical distance, i.e. distance in a direction perpendicular to the axial and lateral directions.

Specifically, the proximal end of the guide surface 41 is smoothly connected with the bottom surface of the convex portion 23, and the distal end of the guide surface 41 is smoothly connected with the nail abutting surface 21 to achieve communication, so that the clearance concave portion 40 is communicated with the nail abutting surface 21. That is, there is no difference in height between the distal end of the guide surface 41 and the nail abutment surface 21, and the staples 50 can move from the nail abutment surface 21 to the guide surface 41 without hindrance and pass through the convex portions 23 along the guide surface 41, thereby avoiding being caught by the convex portions 23.

In the present embodiment, the guide surface 41 is a flat surface. That is, the clearance recess 40 has a triangular shape in side view. Of course, the guide surface 41 may be a concave surface, that is, the recess 40 is curved in a side view.

In the present embodiment, the escape surface 42 is a plane surface. In an embodiment not shown, the guide surface 41 and the avoiding surface 42 are both concave surfaces, and the guide surface 41 and the avoiding surface 42 are smoothly connected, so that the guide surface 41 and the avoiding surface 42 form a curved surface together, and the avoiding concave portion 40 is smoother from the distal end to the proximal end, so that the staples 50 which do not participate in anastomosis can more smoothly pass through the convex portion 23 and can be prevented from being clamped by the convex portion 23.

In an embodiment not shown, the guide surface 41 is coplanar with the nail abutment surface 21. That is, the relief recess 40 is formed by directly cutting the protrusion 23 inward to a predetermined depth. In this way, the entirety of the convex portion 23 does not cause a stop for the staples 50, and it is ensured that the staples 50 which do not participate in anastomosis smoothly pass through the convex portion 23 and slide out of the staple abutting seat grooves 22.

In the present embodiment, the width of guide surface 41 is greater than the diameter of the legs of staple 50. Since the legs of staples 50 are typically 0.2mm in diameter, the width of guide surface 41 needs to be greater than 0.2 mm. The width of the guide surface may also be referred to as the depth of the clearance recess, wherein the depth is the dimension in the transverse direction. Preferably, the width of the guide surface 41 is greater than 0.2mm and equal to or less than 0.92 mm. The axial direction extends between the distal end and the proximal end, transversely perpendicular to the axial direction and parallel to the staple abutment surface 21.

Referring to FIG. 8, the present application further provides a surgical instrument comprising a handle assembly 80, a shaft assembly 90, and an end effector 100, the end effector 100 comprising the jaw assembly described above. A shaft member 90 extends axially distally from the handle member 80, and a jaw member is disposed at the distal end of the shaft member 90.

In this embodiment, the surgical instrument is described as being deployed using a stapler as an example.

Specifically, when the staple abutting seat 20 is in the open position, the staple cartridge module 30 is loaded into the staple cartridge seat 10, the staple cartridge protection cover is removed, and the staple abutting seat 20 is closed. After the end effector 100 is advanced into the patient, the anvil 20 of the jaw assembly is opened, and when the target tissue is located between the cartridge seat 10 and the anvil 20 of the jaw assembly, the anvil 20, and thus the end effector 100, is closed.

In this embodiment, the nail pushing surface of the nail pushing seat 20 is provided with nail forming grooves, the nail forming grooves are arranged in rows, and two sides of the nail pushing seat groove 22 are provided with a plurality of rows of nail forming grooves. The staple forming recesses correspond one-to-one with the staple cavities of the staple cartridge assembly 30 in the vertical direction.

With continued reference to fig. 1 and 7, the stapler further includes a cartridge assembly 30 and a cutting assembly 60. Cartridge assembly 30 includes a cartridge body, staples 50, staple drivers driving staples 50, and staple pusher blocks 70 driving the staple drivers. A plurality of through holes are arranged in the nail bin body in a vertically penetrating manner, the through holes form a nail cavity, at least one part of the anastomotic nail driver and the anastomotic nails 50 are positioned in the nail cavity, and a nail pushing block 70 is further arranged at the near end of the nail bin body. The cartridge body further comprises a channel (not shown), the middle part of the staple pushing block 70 is located in the channel and can move in the channel, and a plurality of staple cavities are arranged on both sides of the channel. Since a portion of the staple driver is disposed in the staple cavity, the staple cavity defines that the staple driver can only move up and down relative to the cartridge body, and when the cam portions on both sides of the staple pushing block 70 apply force to the guide surfaces of the staple driver, the staple driver and the staples 50 can only move up relative to the cartridge body. The supporting piece is further arranged below the nail bin body, so that the anastomotic nail driver can be prevented from being separated from the nail bin body, and the strength of the nail bin body can be enhanced. To prevent staples 50 from falling out of the staple cavities during storage, shipping, or assembly to end effector 100 of the surgical instrument. Under the premise that the end effector 100 is closed, the staple pushing block 70 moves from the proximal end of the cartridge body to the distal end of the cartridge body under the pushing action of the cutting assembly 60, and the staple pushing block 70 pushes the staple driver to move upward in the staple cavity in the moving process, so that the staples 50 move upward, pierce through the tissue of the patient, and suture the wound of the patient until the staples 50 are disengaged from the staple cavity.

The nail abutting seat 20 is provided with a nail abutting seat groove 22 in the nail abutting seat, and the nail box seat 10 is provided with a nail box seat groove in the nail box seat; the position of the nail box seat groove corresponds to that of the nail abutting seat groove 22. Together, the cartridge pocket, staple abutment pocket 22 and the feeder channel provide accommodation and path guidance for cutting assembly 60. The cutting assembly 60 comprises a supporting part and a clamping part, and the supporting part and the clamping part form an I shape; the snap-fit portion is located on the distal underside of the cutting assembly 60; the upper side of the distal end of the cutting assembly 60 is provided with a bearing; the clamping part corresponds to the position of the supporting part. The nail bin base groove is matched with the shape of the clamping portion, and the nail abutting base groove 22 is matched with the shape of the supporting portion, so that a movement channel is respectively provided for the clamping portion and the supporting portion, and the arrangement is favorable for the bidirectional limiting cutting assembly 60 when the nail abutting base 20 is opened and closed. Wherein, the lower side clamping part of the distal end of the cutting component 60 is arranged in the nail box base groove, and the supporting part of the upper side of the distal end of the cutting component 60 enters the nail abutting base groove 22, so that the cutting component 60 can move in the nail abutting base groove 22 and the nail box base groove at the upper side and the lower side, and move from the proximal end to the distal end to cut the human tissue. When the cutting assembly 60 is subjected to a striking force or a retraction force, the supporting part is in the nail abutting seat groove 22, and the clamping part can reciprocate in the nail box seat groove in response to the applied force; that is, the cutting assembly 60 can reciprocate within the end effector 100 in response to an applied firing or retraction force.

As described above, staple holder 20 is pivotally connected to cartridge holder 10, and staple holder 20 has an open position and a closed position and is selectively movable between the open position and the closed position. The anastomat is also provided with a jaw component driving mechanism, a cutting knife component driving mechanism and a power source. The power source drives the nail abutting seat to pivot relative to the nail bin seat through the jaw component driving mechanism so as to realize the opening and closing of the jaw component, and the power source drives the cutting component 60 to move forwards through the cutting knife component driving mechanism so as to realize the firing and the backward movement so as to realize the knife withdrawing; the power source can be a handle for manual operation or a motor. After the jaw assemblies are closed, the cutting assembly 60 drives the staple pusher block 70 from the proximal end to the distal end under the influence of the cutting assembly drive mechanism. Specifically, the staple pushing block 70 drives the staples 50 to move upward relative to the staple cartridge body of the staple cartridge assembly 30, the staples 50 gradually separate from the staple cavities, and after the staple tips penetrate through the target tissue to be sutured between the staple cartridge seat 10 and the staple abutting seat 20, the staple tips are pressed and bent after contacting with the staple forming grooves of the staple abutting seat 20, and a specific shape is formed along the staple forming grooves, so that the suturing of the tissue is realized. At the same time, the cutting edge of the cutting assembly 60 cuts the target tissue, thereby effecting simultaneous cutting of the severed tissue while suturing. The jaw assembly driving mechanism, the cutting knife assembly driving mechanism and the power source are all in the prior art, and the specific structural composition can be referred to in the prior application CN202010365525.0 of the applicant, which is not described herein again.

The utility model discloses an anastomat, it supports nail seat 20 includes convex part 23, and convex part 23 is protruding to be located the near-end of supporting nail face 21, when nail storehouse seat 10 is in the closed position with 30 butts of nail storehouse subassembly. The convex portion 23 is provided with a clearance concave portion 40 for avoiding the anastomotic nail 50 which does not participate in anastomosis, the clearance concave portion 40 is arranged on one side of the convex portion 23 facing the nail abutting seat groove 22, and the clearance concave portion 40 is communicated with the nail abutting surface 21, so that when the anastomotic nail 50 which does not participate in anastomosis appears in the nail abutting seat groove 22, the clearance space formed by the clearance concave portion 40 can be smoothly passed through the convex portion 23, the convex portion 23 is prevented from stopping the anastomotic nail 50, the situation that the cutter knife is stuck by the anastomotic nail 50 which does not participate in anastomosis is avoided, and the situation that the cutter knife cannot return to the initial position to cause the jaw assembly to be opened is avoided.

It should be noted that the above embodiments are described with respect to a surgical instrument by way of example of a stapler, and the above embodiments may be applied to other surgical instruments having a cartridge seat, an anvil seat, a cartridge assembly, and a cutter assembly.

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 detailed descriptions is only for the specific description of the feasible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention should be included within the scope of the present invention.

Claims (10)

1. A jaw assembly comprising a magazine base (10) and a staple abutment base (20) pivotally connected to the magazine base (10); the nail bin seat (10) is used for installing a nail bin assembly (30), the nail abutting seat (20) is provided with an opening position and a closing position and selectively moves between the opening position and the closing position, the nail abutting seat (20) is provided with a nail abutting surface (21) and a nail abutting seat groove (22), the nail abutting seat groove (22) is axially divided into the nail abutting surface (21), the nail abutting seat (20) is characterized by further comprising a convex part (23), the convex part (23) is arranged at the proximal end of the nail abutting surface (21) in a protruding mode and abuts against the nail bin assembly (30) when the nail bin seat (10) is in the closing position; the convex part (23) is provided with a clearance concave part (40) used for avoiding anastomotic staples (50), the clearance concave part (40) is arranged on one side, facing the staple abutting seat groove (22), of the convex part (23), and the clearance concave part (40) is communicated with the staple abutting surface (21).

2. The jaw assembly of claim 1, wherein the clearance recess (40) comprises a guide surface (41) and a relief surface (42), the guide surface (41) being disposed at an angle to the relief surface (42).

3. The jaw assembly of claim 2, wherein the guide surface (41) is smoothly connected with the staple abutment surface (21).

4. The jaw assembly of claim 2, wherein the guide surface (41) is coplanar with the staple abutment surface (21).

5. The jaw assembly of claim 2, wherein the distance between the guide surface (41) and the staple abutment surface (21) decreases in a distal direction, and the distal end of the guide surface (41) communicates with the staple abutment surface (21).

6. The jaw assembly according to claim 5, characterized in that said guide surface (41) is plane or concave.

7. The jaw assembly of claim 4 or 5, wherein the escape surface (42) is concave or planar.

8. The jaw assembly according to claim 4 or 5, wherein the width of the guide surface (41) is greater than the diameter of the staple (50).

9. The jaw assembly according to claim 8, characterized in that the width of the guide surface (41) is greater than 0.2mm and equal to or less than 0.92 mm.

10. A surgical instrument comprising a handle assembly (70), a shaft assembly (80) and a jaw assembly of any one of claims 1 to 9, the shaft assembly (80) extending axially distally from the handle assembly (70), the jaw assembly being disposed at a distal end of the shaft assembly (80).

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