CN210931605U - Nail anvil assembly and anastomat adopting same - Google Patents

Abstract

The utility model relates to a nail anvil subassembly and adopt anastomat of this nail anvil subassembly, include: nail anvil base, the backing knife circle, well core rod and stroke piece, nail anvil base internal surface is provided with radial spout, the backing knife circle is provided with radial recess, the stroke piece is installed in the space that radial spout and radial recess lock are constituteed with sliding, make nail anvil base keep perpendicular or side-falling for well core rod through the spacing cooperation of stroke piece, still include the connecting axle, connect well core rod and nail anvil base through the connecting axle, well core rod is the cavity body of rod, a terminal surface is provided with spacing recess, through spacing cooperation of spacing recess and stroke piece, be provided with the slope lug on the backing knife circle, the backing knife circle is through slope lug and stroke piece slant sliding fit in order to promote the stroke piece. The nail anvil base can be tilted laterally after the anastomat is fired, and the technical problem that the nail anvil base is damaged when passing through an anastomotic stoma after the anastomat is fired is solved.

Description

Nail anvil assembly and anastomat adopting same

Technical Field

The utility model relates to a surgical stapler component, in particular to a nail anvil component and a stapler adopting the nail anvil component.

Background

The anastomat is an indispensable medical suturing device in the process of suturing human tissues, and has the advantages of less bleeding in the operation, shorter operation time, capability of reducing manual operation errors, infection avoidance, quick postoperative function recovery and the like. Particularly in the surgical operation of cutting the digestive tract of the human body, the instrument can shorten the operation time and improve the operation efficiency.

At present, most anastomats adopt an axial internal stapling mode and mainly comprise a nail anvil assembly, a nail box assembly, a firing device and a device body, wherein the firing device is used for firing nails in the nail box assembly, the nail box assembly and the firing device are arranged on the device body, the nail anvil assembly is detachably connected with the firing device, the nails are arranged in the nail box assembly, and the firing device is used for firing the nails in the nail box assembly so as to be matched with the nail anvil assembly to complete stapling. When binding, the end parts of two sections of tissues to be connected are placed between the nail anvil component and the nail box component, through the triggering of the triggering device, the nails arranged in the nail box component in the ring shape are matched with the nail anvil component to generate deformation, the two sections of tissues are bound together, and a closed binding ring is formed inside the tissues, however, after most of the existing tubular anastomats are triggered, because the nail anvil component and the nail box component are respectively positioned at the two sides of the binding ring after binding, the nail anvil base and the puncture outfit are in a vertical state, the nail anvil component must pass through the binding ring when being taken out, because the maximum diameter of the nail anvil component is larger than the inner diameter of the binding ring, the nail anvil component must touch the binding ring after the operation, the nail anvil base needs to be twisted left and right and slowly pulled out, and in the process, the nail anvil base can possibly pull an anastomotic opening to cause anastomotic opening damage, this phenomenon is not favorable for the recovery of body tissues after operation, is easy to cause operation complications, has great side effects and reduces the operation effect.

Disclosure of Invention

The utility model aims at providing a nail anvil subassembly that can incline and fall to at least, solve the technical problem that the nail anvil base caused the damage to the anastomotic stoma when passing the anastomotic stoma after the apparatus percussion.

In order to achieve the above object, the utility model provides a nail anvil assembly, include: nail anvil base, the backing knife circle, well core rod and stroke piece, nail anvil base internal surface is provided with radial spout, the backing knife circle is provided with radial recess, the stroke piece is installed in the space that radial spout and radial recess lock are constituteed with sliding, make nail anvil base keep perpendicular or side-falling for well core rod through the spacing cooperation of stroke piece, still include the connecting axle, connect well core rod and nail anvil base through the connecting axle, well core rod is the cavity body of rod, a terminal surface is provided with spacing recess, through spacing cooperation of spacing recess and stroke piece, be provided with the slope lug on the backing knife circle, the backing knife circle is through slope lug and stroke piece slant sliding fit in order to promote the stroke piece.

The stroke piece both sides are equipped with the lug, radial spout includes spout body and side direction extension, the lug is with the side direction extension coupling of radial spout.

The radial groove of the cutter backing ring is provided with a rear wall, and the rear wall seals the radial groove of the cutter backing ring.

The inner surface of the nail anvil base is circumferentially provided with a step ring groove.

The connecting shaft is a step shaft, a central counter bore is formed in the outer surface of the nail anvil base, the large end of the connecting shaft is installed in the central counter bore, and the small end of the connecting shaft is sleeved in the central rod to connect the central rod with the nail anvil base.

The small end of the connecting shaft is radially provided with a pin shaft hole, a stroke hole is formed between the pin shaft hole and the large-end step, and the small end of the connecting shaft is sleeved at one end of the central rod, which is provided with a limiting groove.

The inclined convex block of the cutter backing ring is obliquely arranged on the plane in the cutter backing ring, and the inclined convex block is provided with a guide inclined plane.

The stroke block is characterized in that a limiting bulge is arranged at one end of the stroke block, a sliding bulge is arranged at the other end of the stroke block, the sliding bulge is provided with a vertical surface, a first inclined surface and a second inclined surface, the vertical surface is intersected with the first inclined surface, the first inclined surface is intersected with the second inclined surface, and the stroke block is limited through the limiting bulge. Further, the second bevel angle is greater than the first bevel angle.

The nail anvil is characterized by also comprising an elastic component, and the nail anvil base is driven to incline by the elastic component. Furthermore, the elastic component is a torsion spring or a plate spring, and the elastic component is arranged in the connecting shaft through a pin shaft sleeve.

The utility model also provides an anastomat, including nail casket subassembly, percussion device, ware body and as above nail anvil subassembly, nail casket subassembly and percussion device set up on the ware body, nail anvil subassembly and percussion device detachably are connected, and nail casket subassembly and nail anvil subassembly cooperation are accomplished and are sewed up.

The utility model provides a nail anvil subassembly and adopt anastomat of this nail anvil subassembly have following profitable technological effect:

(1) the coupling of the lug that the stroke piece set up and radial spout side direction extension has reduced stroke piece and radial spout side area of contact, has avoided the stroke piece to receive the excessive centre gripping of radial spout and the motion that leads to is not smooth, has guaranteed the smooth and easy slip of stroke piece in radial spout.

(2) The lug that the stroke piece set up has increased the bottom area of contact between stroke piece and the radial spout, has guaranteed upright of stroke piece, has avoided the stroke piece to incline and lead to on one's side in the slip in-process with the counterpoint of cutting knife coupling in-process not just, further avoided because the cutting knife damage that the counterpoint is not just caused.

(3) Through the combination of the step-shaped connecting shaft and the step hole of the nail anvil base, the integral component is split into two parts which are convenient to process, the production cost is reduced, and meanwhile, the nail anvil assembly is convenient to disassemble, assemble and maintain.

(4) The guide inclined plane can ensure that the cutter backing ring is always in contact fit with the stroke block in the moving process of the stroke block and continuously pushes the stroke block to move, so that the stroke block can move more smoothly and effectively; meanwhile, when the cutter passes through the cutter backing ring tangential travel block, the cutter point cuts the inclined bump and then cuts the inclined surface of the travel block, so that the damage to the cutter edge can be avoided.

(5) The radial groove is provided with a rear wall, the radial groove of the cutter backing ring is sealed, foreign matters are prevented from entering the radial groove, and meanwhile, the rear wall can interact with the stroke block to play a role in limiting the stroke block; the safe and effective percussion of the anastomat is realized.

(6) The step face of the step ring groove can increase the size of the inner wall of the nail anvil base, so that on the basis of ensuring the strength of the nail anvil base, the thickness of the outer wall of the bottom of the nail anvil base can be reduced, and the nail anvil base is narrower in transverse volume after rotating for 90 degrees, thereby being beneficial to taking out the nail anvil component.

Drawings

FIG. 1 is a perspective view of a nail anvil assembly of the present invention;

FIG. 2 is a cross-sectional view of the middle nail anvil assembly of the present invention;

FIG. 3 is a partially disassembled view of the nail anvil assembly of the present invention;

FIG. 4 is a partial enlarged cross-sectional view of the nail anvil assembly of the present invention;

FIG. 5 is a schematic view of the initial state of the nail anvil assembly of the present invention;

FIG. 6 is a schematic view of the side-falling state of the nail anvil assembly of the present invention;

fig. 7 is a schematic view of the thickness of the outer wall of the middle nail anvil assembly of the present invention when different ring grooves are formed.

Reference numerals:

1. the nail anvil comprises a nail anvil base, 2, a knife backing ring, 3, a center rod, 4, a connecting shaft, 5, a stroke block, 6, a pin shaft, 7, an elastic component, 11, a step ring groove, 12, a radial sliding groove, 21, an inclined convex block, 22, a radial groove, 23, a rear wall, 31, a limiting groove, 51 and a convex block.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "abutted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model aims at providing a nail anvil subassembly and adopt anastomat of this nail anvil subassembly, as shown in fig. 1-4, this embodiment discloses a nail anvil subassembly, include:nail anvil base 1,backing knife ring 2,well core rod 3 andstroke piece 5,nail anvil base 1 internal surface is provided withradial spout 12,backing knife ring 2 is provided withradial recess 22,stroke piece 5 is installed in the space that radial spout 12 andradial recess 22 lock are constituteed with sliding, makenail anvil base 1 keep perpendicular or the side fall for wellcore rod 3 through the spacing cooperation ofstroke piece 5, still include connectingaxle 4, connect wellcore rod 3 andnail anvil base 1 through connectingaxle 4, wellcore rod 3 is the cavity body of rod, a terminal surface is provided withspacing recess 31, throughspacing recess 31 and the spacing cooperation ofstroke piece 5, be provided withslope lug 21 onbacking knife ring 2,backing knife ring 2 is throughslope lug 21 and the cooperation ofstroke piece 5 slant slip in order to promotestroke piece 5.

In an embodiment, as shown in fig. 3, the radial slidinggroove 12 includes a sliding groove body and a lateral extension portion, and the coupling of theprotrusion 51 provided on thestroke block 5 and the lateral extension portion of the radial sliding groove reduces the contact area between the stroke block and the lateral surface of the radial sliding groove, thereby preventing the stroke block from moving unsmoothly due to excessive clamping of the radial sliding groove, and ensuring smooth sliding of the stroke block in the radial sliding groove.

Simultaneously, thelug 51 thatstroke piece 5 set up has increased the bottom area of contact betweenstroke piece 5 andradial spout 12, has guaranteed upright of stroke piece, has avoided stroke piece to incline and lead to on one's side in the slip process with the counterpoint of cutting knife coupling in-process not just, further avoided because the cutting knife damage that the counterpoint is not just caused.

In one embodiment, as shown in fig. 4, theanvil base 1 has astepped ring groove 11 formed on the inner surface thereof. The connectingshaft 4 is a step shaft, a central counter bore is formed in the outer surface of thenail anvil base 1, the large end of the connectingshaft 4 is installed in the central counter bore, and the small end of the connecting shaft is sleeved in thecentral rod 3 to connect thecentral rod 3 and thenail anvil base 1.

The small end of the connectingshaft 4 is radially provided with a pin shaft hole, a stroke hole is formed between the pin shaft hole and the large-end step, and the small end of the connectingshaft 4 is sleeved at one end of thecentral rod 3, which is provided with alimiting groove 31.

Thestroke block 5 one end is provided with spacing arch, and the other end is provided with the slip arch, and the slip arch has perpendicular, first inclined plane and second inclined plane, and the perpendicular is crossing with first inclined plane, and first inclined plane is crossing with the second inclined plane, and is spacing through spacing arch. Further, the second bevel angle is greater than the first bevel angle.

Theinclined convex block 21 of thecutter backing ring 2 is obliquely arranged on the plane in thecutter backing ring 2, and theinclined convex block 21 is provided with a guide inclined plane. The guiding slope of theinclined projection 21 and the first slope are in contact with each other, and the inclined surface can be engaged with the slope of thestroke block 5.

Theradial groove 22 is provided with arear wall 23 in a direction close to thecentral rod 3 in the radial direction, and therear wall 23 closes theradial groove 22 of theshim ring 2 to prevent foreign matters from entering theradial groove 22 to cause obstruction to the radial movement of thestroke block 5; furthermore, therear wall 23 can interact with thestroke block 5, acting as a stop for thestroke block 5.

The nail anvil machine further comprises anelastic component 7, and thenail anvil base 1 is driven to incline through theelastic component 7.

Theelastic component 7 is a torsion spring or a plate spring, and theelastic component 7 is sleeved in the connectingshaft 4 through apin shaft 6.

In one embodiment, as shown in fig. 5, in the initial state, the limit protrusion of thestroke block 5 is located in thelimit groove 31 of thecentral rod 3, so that theanvil base 1 and thecentral rod 3 are kept in a vertical state, and the guide inclined surface is matched with the first inclined surface of thestroke block 5.

When the cutter is tangential to thecutter backing ring 2, theinclined convex block 21 slides along the first inclined plane and the second inclined plane in sequence, and the cutter pushes the first inclined plane and the second inclined plane of thestroke block 5 in sequence through the inclined plane guided by thecutter backing ring 2, so that thestroke block 5 is pushed to deviate.

As shown in fig. 6, when the cutter cuts the tissue after passing through thecutter backing ring 2, the cutter continues to advance to push thestroke block 5, and when the limiting bulge of thestroke block 5 leaves thelimiting groove 31 of thecentral rod 3, theanvil base 1 is separated from the limiting, so that the side falls under the action of theelastic component 7.

When the limiting bulge is arranged in thelimiting groove 31 of thecentral rod 3, thestroke block 5 enables thenail anvil base 1 to be vertical to thecentral rod 3, and when the limiting bulge is separated from thelimiting groove 31 of thecentral rod 3, thenail anvil base 1 falls under the action of theelastic component 7. Thestroke block 5 is accommodated in the stroke hole of the connectingshaft 4 after moving to be separated from thelimiting groove 31 of thecentral rod 3.

In an embodiment, as shown in fig. 7, the step surface of thestep ring groove 11 can increase the size of the inner wall of thenail anvil base 1, when the ring groove on the inner surface of thenail anvil base 1 is a vertical ring groove, the inner wall of thenail anvil base 1 is smaller, the thickness of the outer wall of the bottom of thenail anvil base 1 is a dotted line portion, and when the ring groove is thestep ring groove 11, on the basis of ensuring the strength of thenail anvil base 1, the thickness of the outer wall of the bottom of thenail anvil base 1 can be set to be a solid line portion, so that it can be seen that thestep ring groove 11.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a nail anvil subassembly, including nail anvil base, the backing knife circle, well core rod and stroke piece, nail anvil base internal surface is provided with radial spout, the backing knife circle is provided with radial recess, the stroke piece is installed in the space that radial spout and radial recess lock are constituteed with sliding, make nail anvil base keep perpendicular or the side fall for well core rod through the spacing cooperation of stroke piece, a serial communication port, still include the connecting axle, connect core rod and nail anvil base through the connecting axle, well core rod is the cavity body of rod, a terminal surface is provided with spacing recess, through spacing cooperation of spacing recess and stroke piece, be provided with the slope lug on the backing knife circle, the backing knife circle is through slope lug and stroke piece slant sliding fit in order to promote the stroke piece.

2. The anvil assembly of claim 1 wherein: the stroke piece both sides are equipped with the lug, radial spout includes spout body and side direction extension, the lug is with the side direction extension coupling of radial spout.

3. The anvil assembly of claim 1 wherein: the radial groove of the cutter backing ring is provided with a rear wall, and the rear wall seals the radial groove of the cutter backing ring.

4. The anvil assembly of claim 1 wherein: the inner surface of the nail anvil base is circumferentially provided with a step ring groove.

5. The anvil assembly of claim 1 wherein: the connecting shaft is a step shaft, a central counter bore is formed in the outer surface of the nail anvil base, the large end of the connecting shaft is installed in the central counter bore, and the small end of the connecting shaft is sleeved in the central rod to connect the central rod with the nail anvil base.

6. The anvil assembly of claim 5 wherein: the small end of the connecting shaft is radially provided with a pin shaft hole, a stroke hole is formed between the pin shaft hole and the large-end step, and the small end of the connecting shaft is sleeved at one end of the central rod, which is provided with a limiting groove.

7. The anvil assembly of claim 1 wherein: the inclined convex block of the cutter backing ring is obliquely arranged on the plane in the cutter backing ring, and the inclined convex block is provided with a guide inclined plane.

8. The anvil assembly of claim 1 wherein: the stroke block is characterized in that a limiting bulge is arranged at one end of the stroke block, a sliding bulge is arranged at the other end of the stroke block, the sliding bulge is provided with a vertical surface, a first inclined surface and a second inclined surface, the vertical surface is intersected with the first inclined surface, the first inclined surface is intersected with the second inclined surface, and the stroke block is limited through the limiting bulge.

9. The anvil assembly of claim 1 wherein: the nail anvil is characterized by also comprising an elastic component, and the nail anvil base is driven to incline by the elastic component.

10. An anastomat, which is characterized in that: the stapler comprises a nail box component, a firing device, a machine body and the nail anvil component as claimed in any one of claims 1 to 9, wherein the nail anvil component, the nail box component and the firing device are arranged on the machine body, the nail anvil component is detachably connected with the firing device, and the nail box component is matched with the nail anvil component to complete stitching.

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