阅读说明：本技术 一种具有钉导向结构的钉砧以及包括它的吻合器 (Nail anvil with nail guide structure and anastomat comprising same ) 是由 舒拓 于 2020-04-09 设计创作，主要内容包括：本发明涉及了一种具有钉导向结构的钉砧,其上开设有钉成型槽。针对于单个钉成型槽来说,其由相互对称的前置成型部和后置成型部相结合而成。其中,前置成型部的侧壁依序由第一导向斜面、第三导向斜面以及第四导向斜面围合构成。后置成型部的侧壁依序由第二导向斜面、第五导向斜面以及第六导向斜面围合构成。这样一来,一方面,有效地保证了各缝钉相对于针成型槽的对位精度,确保对组织进行有效缝合；另一方面,在一定程度上放松了钉砧相对于钉仓的装配精度要求,进而降低了对钉砧、钉仓制造精度的要求,有效地减少了制造成本。另外,本发明还涉及了一种包括上述钉砧的吻合器。(The invention relates to a nail anvil with a nail guide structure, which is provided with a nail forming groove. For a single staple forming groove, it is made up of a combination of a leading and trailing profile that are symmetrical to each other. Wherein, the lateral wall of leading shaping portion encloses in proper order by first direction inclined plane, third direction inclined plane and fourth direction inclined plane and closes to constitute. The side wall of the rear forming part is formed by enclosing a second guide inclined plane, a fifth guide inclined plane and a sixth guide inclined plane in sequence. Therefore, on one hand, the alignment precision of each stitching nail relative to the needle forming groove is effectively ensured, and the effective suturing of the tissue is ensured; on the other hand, the assembly precision requirement of the nail anvil relative to the nail bin is relaxed to a certain extent, so that the requirements on the manufacturing precision of the nail anvil and the nail bin are reduced, and the manufacturing cost is effectively reduced. In addition, the invention also relates to a stapler comprising the nail anvil.)

1. A nail anvil with a nail guide structure is provided with a plurality of nail forming grooves on an anastomotic surface, and linear arrays are carried out along the length direction of the nail anvil; aiming at a single nail forming groove, the nail forming groove is formed by combining a front forming part and a rear forming part which are symmetrical to each other, and is characterized in that a first guide inclined plane is arranged in the front forming part and formed by obliquely and downwardly extending the inosculating surface from front to back; a second guide inclined plane is arranged in the rear forming part and is formed by obliquely and downwardly extending the inosculating surface from back to front; the front forming part also comprises a third guide inclined plane and a fourth guide inclined plane which are oppositely arranged along the left-right direction; the third guide inclined plane is formed by obliquely and downwardly extending the inosculation surface from left to right; the rear forming part also comprises a fifth guide inclined plane and a sixth guide inclined plane which are oppositely arranged along the left-right direction; the fifth guide inclined plane is formed by the downward inclined extension of the inosculation surface along the left-to-right direction.

2. The anvil with the staple guide structure of claim 1, wherein said first guide ramp and said second guide ramp are formed by a plurality of arcuate curves extending in sequence, and said third guide ramp, said fourth guide ramp, said fifth guide ramp, and said sixth guide ramp are formed by a plurality of straight lines extending in sequence.

3. The anvil with the staple guide structure of claim 2, wherein said first guide ramp, said second guide ramp, said third guide ramp, said fourth guide ramp, said fifth guide ramp, and said sixth guide ramp are formed with a dimensional accuracy greater than IT8 grade and a surface roughness value of 3.2 μm or less.

4. The anvil with staple guide arrangement of any one of claims 1-3, wherein said forward forming portion has a decreasing horizontal plane opening dimension d1 in a front-to-rear direction; the post-forming portion has a horizontal plane opening dimension d2 that gradually decreases in a rear-to-front direction.

5. A stapler comprises a nail bin, a nail bin frame, a nail anvil and a connector, wherein the nail bin and the nail bin frame are fastened and fixed and are arranged opposite to the nail anvil; the adapter, the nail storehouse frame and the nail anvil are hinged into a whole, and the nail anvil is characterized in that the nail anvil of any one of claims 1-5.

Technical Field

The invention relates to the technical field of medical instrument manufacturing, in particular to a nail anvil with a nail guide structure and a stapler comprising the nail anvil.

Background

In laparoscopic surgery and thoracoscopic surgery, the laparoscopic cutting stapler is generally used for cutting and anastomosis operations of esophagus, stomach, duodenum, small intestine, colon, rectum, appendix, gallbladder, pancreas, spleen and the like in the digestive tract, for cutting and anastomosis operations of lung, trachea and the like in the respiratory tract, and for cutting and anastomosis operations of bladder, uterus and the like in the urogenital system, and through the application, the surgical wound can be greatly reduced, the operation time can be shortened, and the operation quality can be improved.

Generally, the nail bin and the nail bin frame are fixed into a whole, and a cutter path is arranged along the length direction of the nail bin and the nail bin frame. The tissue is placed between the nail bin and the nail anvil, at the moment, the trigger handle is pulled, the nail pushing sheet gradually extends out towards the tissue under the action of the oblique force, namely, two rows of staggered nails are placed into the tissue and are bent into a B shape under the action of the nail forming groove on the nail anvil, and then the tissue is sutured. In order to ensure that the staples are smoothly guided into the staple forming grooves corresponding to the staples and ensure the final forming quality of the staples, the stapler is required to strictly control the relative position error between the staple cartridge and the staple anvil in the manufacturing and assembling processes, thereby inevitably increasing the production cost greatly. Thus, a skilled person is urgently needed to solve the above problems.

Disclosure of Invention

The invention aims to solve the technical problem of providing a nail anvil with a nail guide structure, which has simple structural design, is convenient for smoothly guiding a nail into a corresponding nail forming groove and effectively relaxes the requirements on assembly errors of a nail bin and the nail anvil.

In order to solve the technical problem, the invention relates to a nail anvil with a nail guide structure, wherein a plurality of nail forming grooves are formed on an anastomotic surface of the nail anvil, and linear array is carried out along the length direction of the nail anvil. For a single staple forming groove, it is made up of a combination of a leading and trailing profile that are symmetrical to each other. The front forming part is internally provided with a first guide inclined plane which is formed by obliquely and downwardly extending an inosculating surface from front to back. The rear forming part is internally provided with a second guide inclined surface which is also formed by extending the matching surface downwards along the direction from the back to the front in an inclined way. The front forming part also comprises a third guide inclined surface and a fourth guide inclined surface which are oppositely arranged along the left-right direction. The third guide inclined plane is formed by obliquely and downwardly extending an inosculation surface from left to right. In addition, the post-forming part further comprises a fifth guide inclined surface and a sixth guide inclined surface which are oppositely arranged along the left-right direction. The fifth guide inclined plane is formed by extending the inosculating surface obliquely downwards from left to right.

As a further improvement of the technical solution of the present invention, the first guide inclined plane and the second guide inclined plane are formed by sequentially extending an infinite number of arc-shaped curves, and the third guide inclined plane, the fourth guide inclined plane, the fifth guide inclined plane and the sixth guide inclined plane are formed by sequentially extending an infinite number of straight lines.

As a further improvement of the technical scheme of the invention, the forming dimensional accuracy of the first guide inclined surface, the second guide inclined surface, the third guide inclined surface, the fourth guide inclined surface, the fifth guide inclined surface and the sixth guide inclined surface is higher than IT8 level, and the surface roughness value is less than or equal to 3.2 mu m.

As a further improvement of the technical solution of the present invention, the horizontal plane opening dimension d1 of the front forming portion gradually decreases along the front-to-rear direction. The post-forming portion has a horizontal surface opening dimension d2 gradually decreasing in a rear-to-front direction.

Compared with the nail anvil with the traditional design structure, in the technical scheme disclosed by the invention, a plurality of guide inclined planes are arranged around the nail forming groove. In the process of suturing tissues, even if the nail anvil generates a certain deviation amount relative to the nail bin, the nails can be smoothly guided in under the action of the guide inclined plane. Therefore, on one hand, the alignment precision of each stitching nail relative to the needle forming groove is effectively ensured, and the effective suturing of the tissue is ensured; on the other hand, the assembly precision requirement of the nail anvil relative to the nail bin is relaxed to a certain extent, so that the requirements on the manufacturing precision of the nail anvil and the nail bin are reduced, and the manufacturing cost is effectively reduced.

In addition, another technical problem to be solved by the invention is to provide a anastomat.

In order to solve the technical problem, the invention also relates to a stapler which comprises a nail bin, a nail bin frame, the nail anvil and an adapter in the technical scheme, wherein the nail bin and the nail bin frame are fastened and fixed and are arranged opposite to the nail anvil. The adapter, the nail bin frame and the nail anvil are hinged into a whole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of the stapler of the present invention.

FIG. 2 is a perspective view of one aspect of an anvil having a staple guide arrangement according to the present invention.

Fig. 3 is an enlarged view of part I of fig. 2.

Fig. 4 is a top view of fig. 2.

Fig. 5 is a sectional view a-a of fig. 4.

Fig. 6 is a partial enlarged view II of fig. 5.

Fig. 7 is a sectional view B-B of fig. 4.

FIG. 8 is a perspective view of an alternative perspective of an anvil having a staple guide arrangement in accordance with the present invention.

Fig. 9 is a partially enlarged view III of fig. 8.

1-nail bin; 2-nail bin rack; 3-nail anvil; 31-anastomotic surface; 311-nail forming grooves; 3111-pre-form section; 31111-first guide ramp; 311111-arc curve; 31112-third guide ramp; 311121-straight line; 31113-fourth guide ramp; 3112-post-forming section; 31121-a second guide ramp; 31122-fifth guide ramp; 31123-sixth guide ramp; 4-adapter.

Detailed Description

In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", 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 referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The present invention will be further described in detail with reference to the following embodiments, and fig. 1 shows a perspective view of the stapler of the present invention, which is mainly composed of a staple cartridge 1, a staple cartridge frame 2, a nail anvil 3, and an adapter 4, wherein the staple cartridge 1 and the staple cartridge frame 2 are fastened and fixed and are disposed opposite to the nail anvil 3 along the up-down direction. The adapter 4, the nail bin frame 2 and the nail anvil 3 are hinged into a whole. The stapler works substantially as follows when performing tissue stapling: firstly, tissues need to be clamped between the anastomotic surfaces of the nail bin 1 and the nail anvil 3, at the moment, a nail pushing sheet is pre-installed in the nail bin 1, the exciting handle is pulled, the nail pushing sheet gradually extends downwards under the action of oblique force, namely, two rows of staggered nails are placed into the tissues and bent into a B shape, and then the tissues are sutured.

In order to ensure that the staples are smoothly guided into the staple forming grooves corresponding to the staples to perform tissue suturing operation, the technical scheme disclosed by the invention applies the nail anvil with a staple guiding structure, and the specific structure of the nail anvil is explained in detail as follows: as shown in fig. 2, it can be seen that a plurality of staple forming grooves 311 are formed on the engagement surface 31 of the anvil 3, and are linearly arrayed along the front-rear direction (i.e., the length direction of the anvil). For a single staple forming groove 311, it is formed by combining a front molding portion 3111 and a rear molding portion 3112 which are symmetrical to each other. A first guide slope 31111 is provided in the front molding portion 3111, and is formed by the mating surface 31 extending obliquely downward in the front-to-rear direction. A second guide slope 31121 is provided in the post-forming portion 3112, and the second guide slope is formed by the fitting surface 31 extending obliquely downward from the rear to the front. The front molding portion 3111 further includes a third guide slope 31112 and a fourth guide slope 31113 facing each other in the left-right direction. The third guide slope 31112 is formed by the engagement surface 31 extending obliquely downward from left to right. The post-mold section 3112 further includes a fifth guide slope 31122 and a sixth guide slope 31123 facing each other in the left-right direction. Fifth guide bevel 31122 is formed by mating surface 31 also extending obliquely downward in the left-to-right direction (as viewed in fig. 3-9). During the stapling of tissue, even if the anvil 3 deviates from the staple cartridge 1 by a certain amount, the staples can be smoothly guided by the guide slopes (including the first guide slope 31111, the second guide slope 31121, the third guide slope 31112, the fourth guide slope 31113, the fifth guide slope 31122 and the sixth guide slope 31123). Thus, on one hand, at the moment when the staples enter the staple forming grooves 311, the staple forming grooves 311 can guide the staples along the length direction and the width direction thereof, thereby effectively avoiding the dislocation of the staples, ensuring the alignment precision of each staple relative to the staple forming grooves 311 and ensuring the effective suturing of tissues; on the other hand, the assembly precision requirement of the nail anvil 3 relative to the nail bin 1 is relaxed to a certain extent, so that the requirements on the manufacturing precision of the nail anvil 3 and the nail bin 1 are reduced, and the manufacturing cost is effectively reduced.

Here, the following two points also need to be explained: 1) the nail anvil 3 is preferably molded by adopting an integral injection molding mode, so that the production and manufacturing costs are greatly reduced on the premise of ensuring the molding precision; 2) the anvil 3 is preferably made of any one of thermoplastic polyurethane, polyetheretherketone, and polyacetal. As known, the three plastic materials have good structural strength and good thermal fluidity, and are convenient for fully filling a mold cavity; more importantly, the plastic material also has excellent self-lubricating property, so that the movement resistance of the staples in the staple forming groove 311 can be reduced to a certain degree, and the staples can be formed more fully.

As a further optimization of the design structure of the anvil 3, the first guide slope 31111 and the second guide slope 31121 are preferably formed by sequentially extending a plurality of arc-shaped curves 311111 (as shown in fig. 6), and the third guide slope 31112, the fourth guide slope 31113, the fifth guide slope 31122 and the sixth guide slope 31123 are preferably formed by sequentially extending a plurality of straight lines 311121 (as shown in fig. 7). Through adopting above-mentioned technical scheme to set up to more be favorable to the staple to stretch and crimping along its length direction, ensure follow-up reliable sewing up to the tissue.

However, the skilled person will be reminded here that: in fig. 6, only the first guide slope 31111 is schematically illustrated as an example, and the second guide slope 31121 is executed with reference to the first guide slope 31111 in the actual design process. In fig. 7, only the third guide slope 31112 is schematically illustrated as an example, and in the actual design process, the fourth guide slope 31113, the fifth guide slope 31122 and the sixth guide slope 31123 are executed with reference to the first guide slope 31111.

Of course, in order to further reduce the sliding resistance of the staples in the staple forming grooves 311 and improve the alignment accuracy, the forming accuracy of the staple forming grooves 311 needs to be controlled as follows: the first guide slope 31111, the second guide slope 31121, the third guide slope 31112, the fourth guide slope 31113, the fifth guide slope 31122 and the sixth guide slope 31123 are formed with dimensional accuracy higher than IT8, and have a surface roughness value of 3.2 μm or less.

Finally, the horizontal plane opening dimension d1 of the front molding portion 3111 gradually decreases from front to rear. With the post-forming portion 3112, the horizontal plane opening dimension d2 decreases gradually in a rearward-to-forward direction (as shown in FIGS. 8 and 9), thereby further improving the staple forming accuracy and ensuring reliable and accurate stapling of the tissue.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.