Disclosure of Invention
The invention aims to provide a nail bin assembly for a surgical instrument, which is not easy to damage tissues in an initial (unused) state or a cut-out state of a cutting knife, and the surgical instrument.
In order to achieve the aim, the invention is realized by the following technical scheme that the nail bin assembly for the surgical instrument comprises a nail bin and a cutting knife, wherein the nail bin comprises a stitching nail, a nail pushing piece and a nail bin body extending along the longitudinal direction, the nail bin body is provided with a stitching nail cavity, the stitching nail is contained in the stitching nail cavity, the nail pushing piece is used for pushing the stitching nail out of the stitching nail cavity, the nail bin further comprises a pusher used for pushing the nail pushing piece, the cutting knife comprises a cutting edge part, the cutting 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 an initial state or in a cutting completion state.
Further, the staple cartridge body is provided with a cutter slot extending along the longitudinal direction, the pusher comprises a limiting block and pushing parts positioned at two sides of the limiting block, the limiting block is positioned in the cutter slot, and the cutting knife is rotatably connected with the limiting block.
Further, 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 in 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.
Further, the impeller includes the stopper and is located the pushing away portion of stopper both sides, the stopper is equipped with the recess that forms from its top surface undercut, the recess includes two cell walls of relative setting, the member wears to locate logical groove and its tip are installed respectively in two the cell wall.
Further, 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 cutter also comprises a base extending from the blade portion, wherein the base is provided with a circular arc-shaped corner portion, and the circular arc-shaped corner portion is positioned outside the staple cartridge body in an initial state.
Further, the cartridge body includes an insertion end and a distal end, and in an initial state, the cutting blade and the pusher are positioned at the distal end of the cartridge body.
The invention also provides a surgical instrument comprising a shaft assembly and an end effector arranged at one end of the shaft assembly, wherein the end effector comprises a nail bin seat and a nail abutting seat which is pivotally connected with the nail bin seat, the nail bin assembly is detachably arranged in the nail bin seat, the shaft assembly comprises a push cutter, a part of the push cutter is positioned in the end effector, and the nail bin assembly is the nail bin assembly as set forth in any one of the above.
Further, the push-type knife comprises a main body part and an additional part extending from the front side surface of the main body part, wherein the main body part is provided with a first concave part formed by inwards sinking from the front side surface, the opening of the first concave part is arranged towards the direction of the additional part, the inner wall surface of the first concave part is an arc surface, and the additional part is provided with a second concave part formed by downwards sinking from the top surface of the additional part.
The invention has the beneficial effects that the cutting knife is rotatably connected with the pusher, and the cutting edge of the cutting edge part is positioned in the groove and faces downwards in the initial (unused) state or the cutting completion state, so that the cutting edge part is not exposed and does not damage tissues of patients and doctors.
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 the like, 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 defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The meaning of "several" is at least one.
The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not 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 assembly comprises a body and a transmission mechanism arranged on the body, the transmission mechanism is connected with the rod body assembly, and the transmission mechanism drives the rod body assembly to move forwards or backwards. The end effector 100 includes a cartridge holder 10 and a staple holder 20 pivotally connected to the cartridge holder 10, and the cartridge assembly 30 may be engaged in the cartridge holder 10 or may be removed from the cartridge holder 10, i.e., the cartridge assembly 30 may be detachably mounted to the cartridge holder 10, and the cartridge assembly 30 includes a cartridge 40 and a cutter 50. The shaft assembly includes a push-blade 60, a portion of the push-blade 60 being located within the end effector 100, the push-blade 60 being configured to move the cutting blade 50 forward or backward. The terms "front" and "rear" are used herein with respect to a clinician manipulating the handle assembly of stapler 100, the term "rear" refers to a direction proximal to the clinician, the term "front" refers to a direction distal from the clinician, the term "longitudinal" is used herein to refer to a direction extending between front and rear, the term "lateral" refers to a direction perpendicular to the longitudinal direction, and the terms "upper" and "lower" are used herein in relative terms, i.e., "upper" for the staple cartridge holder 20 "and" lower "for the staple cartridge holder 10". The term "set" is used herein for a plurality of places, and "set" means a connection relationship or a positional relationship between two members.
As shown in fig. 3 to 5, the cartridge 40 includes a staple (not shown) and a pusher (not shown), a cartridge body 41 extending in a longitudinal direction, a pusher 42 mounted to the cartridge body 41, and a bracket 43, the bracket 43 movably mounting the pusher 42 to the cartridge body 41. The cutter 50 is rotatably connected to the pusher 42. The cartridge body 41 is provided with a plurality of staple cavities (not numbered), a portion of the staple pusher and staples are disposed within the staple cavities, and the pusher 42 drives the staple pusher to move, which pushes the staples out. When the cartridge 40 is not in use, a cover (not shown) is provided over the cartridge 40 to prevent dust and the like from entering the cartridge 40. The cartridge body 41 is provided with a cutter slot 410 in a longitudinal direction, and the cutter slot 410 is provided for the cutter 50 to move therein. The cartridge body 41 includes an insertion end 411 and a distal end 412, and in an initial state, both the cutter 50 and the pusher 42 are disposed at the distal end 412 of the cartridge body 41. The pusher 60 is used to push against the knife 50 and the pusher 42, the pusher 42 pushing against the staple pusher, which pushes the staples out of the staple cavities. The initial state refers to 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 having a cutting edge 510 for cutting tissue, and the base portion 52 having a circular arc-shaped corner 521. In an initial state or after cutting tissue, cutting edge 510 is positioned within knife slot 410 and faces 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 52 extends beyond the rear end face of the cartridge body 41, i.e., the rounded corner 521 is located outside the cartridge body 41. The blade 51 is provided with a through groove 53, the through groove 53 includes a first portion 54 and a second portion 55 connected to each other, the first portion 54 is a circular arc-shaped through hole, the second portion 55 is a long strip-shaped through groove, and the diameter of the first portion 54 is larger than the width of the second portion 55. The pusher 42 includes a limiting block 421 and 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 downwardly recessing from a top surface of the limiting block 421, and each pushing portion 422 includes two pushing blocks 426 disposed in parallel, and the pushing blocks 426 are used for pushing the push nail. In the initial state or the cut-out state, a part of the blade portion 51 is located in the groove 423, that is, the blade 510 is located in the groove 423 and toward the bottom of the groove 423, so that the blade 510 is directed downward without being exposed as shown in fig. 5 and 6, thereby not damaging the tissue. The groove 423 has two opposite groove walls 424, the two groove walls 424 are respectively provided with a receiving hole 425, the cartridge assembly 30 further includes a rod 70, the rod 70 is disposed through the first portion 54 of the through groove 53 and the ends of the rod 70 are respectively mounted in the receiving holes 425 of the two groove walls 424, when the rod 70 is located in the first portion 54 of the through groove 53, the cutter 50 can rotate around the rod 70 along a first direction or a second direction, and the first direction is opposite to the second direction. The push blade 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 recess 63 formed by recessing inward from the front side surface thereof, an opening of the first recess 63 is provided toward the additional portion 62, an inner wall surface of the first recess 63 is an arc surface, and the additional portion 62 is provided with a second recess 64 formed by recessing downward from a top surface thereof.
When the cartridge assembly 30 is used, the cover body on the cartridge 40 is removed first, then the cartridge assembly 30 in the initial state is loaded into the cartridge holder 10, specifically, the cartridge assembly 30 loads the rear end of the cartridge assembly 30 into the cartridge holder 10 in an obliquely downward direction first, and then the rest of the cartridge assembly 30 is pivotally loaded into the cartridge holder 10 with the rear end of the cartridge assembly 30 as a pivot axis. When the cartridge assembly 30 is mounted in the cartridge holder 10, the circular arc corner 521 of the base 52 of the cutter 50 abuts against the first recess 63 of the main body 61 of the pusher 60, the circular arc corner 521 slides on the inner wall surface of the first recess 63 during the pivotal mounting, the circular arc corner 521 slides from the upper end of the first recess 63 to the lower end of the first recess 63 under the guiding action of the first recess 63, during this process, the cutter 50 rotates around the rod 70 in the first direction, after 90 ° rotation, the cutting edge 510 of the cutting edge 51 is located above the cutter slot 410 and the cutting edge 510 faces the insertion end 411 of the cartridge body 41, the base 52 of the cutter 50 falls into the second recess 64, and at this time, the main body 61 of the pusher 60 pushes the base 52 of the cutter 50 forward, so that the cutter 50 moves forward, and during this forward movement, the cutter 50 moves from the first end 531 to the second end 532 of the through groove 53 where the rod 70 is located. When the lever 70 is located at the position 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 cutter 50 and the stopper 421 of the pusher 42, and the additional portion 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 cutter 50 and the stopper 421 of the pusher 42 forward, the additional portion 62 pushes the pusher 42 forward, the pusher 42 and the cutter 50 move forward simultaneously, and the cutting edge 510 of the cutting edge 51 cuts tissue in the forward advancing process. When the cutter 50 is moved from the distal end 412 of the cartridge body 41 to the insertion end 411 of the cartridge body 41, the cutting of the tissue is completed. Because of the frictional force between the pusher 42 and the cartridge body 41, if it is desired to move the pusher 42, a sufficient force needs to be applied to the pusher 42. After the tissue is cut, the push cutter 60 is moved backward, and the base 52 of the cutter 50 is located in the second recess 64 of the additional portion 62 of the push cutter 60, so that the additional portion 62 drives the cutter 50 to move backward, and during the backward movement of the cutter 50, the rod 70 is returned from the second end 532 of the through slot 53 to the first end 531, i.e. the rod 70 is returned to the first portion 54 of the through slot 53. The pushing member 60 continues to move backward, the pushing member 60 applies a backward force to the cutter 50, the cutter 50 applies a backward force to the pusher 42, and due to the friction force between the pusher 42 and the cartridge body 41, the force cannot drag the pusher 42 backward, and the force causes the circular arc corner 521 of the base 52 of the cutter 50 to slide from the lower end of the first recess 63 to the upper end of the first recess 63, during which the cutter 50 rotates 90 ° around the rod 70 in the second direction opposite to the first direction, after the rotation, the cutting edge 510 is located in the groove 423 and faces the bottom of the groove 423, at this time, the base 52 of the cutter 50 is separated from the second recess 64 of the attachment 62, and the cutter 50 and the pusher 42 are not driven to move backward during the continued backward movement of the pushing member 60, i.e., the cutter 50 and the pusher 42 remain at the insertion end 411 of the cartridge body 41.
In summary, when the cartridge assembly 30 is in the initial (unused) state, the cutting edge 510 of the cutting blade 51 of the cutter 50 is located in the groove 423 of the stopper 421 of the pusher 42 and faces the bottom of the groove 423, the cutting edge 510 of the cutting blade 51 is not damaged by foreign objects, when the cartridge assembly 30 is mounted in the cartridge holder 10, the cutting edge 510 of the cutting blade 51 rotates above the blade slot 410 relative to the stopper 421, the cutting blade 510 of the cutting blade 51 cuts tissue during the movement of the cutter 50 in the blade slot 410, and after the tissue is cut, the cutting blade 51 rotates relative to the stopper 421 until the cutting edge 510 of the cutting blade 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 portion 51 is not damaged by patient tissue or foreign objects, and is not damaged by a doctor when the doctor exchanges a cartridge, regardless of whether the cutter 50 is in an initial (unused) state or a cut-out state.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the present invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by those skilled in the art within the scope of the present invention, all of which are within the scope of the present invention.