CN110420042A - A kind of stapler with anastomosis staple Yu nail anvil forming tank automatic contraposition device - Google Patents

Abstract

The invention relates to a stapler with an automatic alignment device for staples and anvil forming grooves, including a staple cartridge, a staple cartridge frame, an anvil and an adapter; wherein, the staple cartridge and the staple cartridge frame are fixed to form a first assembly Body, and placed opposite to the nail anvil. A nail forming groove is arranged on the nail anvil. The adapter, the staple cartridge frame and the staple anvil are hinged as one by means of pin shafts. There is a clearance fit between the pin shaft and the matching pin hole. A positioning protrusion is provided on the first assembly body, and correspondingly, a positioning groove matching the positioning protrusion is provided on the nail anvil. In this way, when the staple cartridge is rotated and closed relative to the nail anvil, the positioning protrusion can be automatically introduced into the positioning groove, which ensures the alignment accuracy of the nail position relative to the nail forming groove, and at the same time forces the staple cartridge to be relatively Adaptive displacement adjustment is performed on the anvil along the left-right direction and the front-back direction.

Description

A stapler with an automatic alignment device for staples and anvil forming grooves

technical field

The invention relates to the technical field of medical device manufacturing, in particular to a stapler with an automatic alignment device for staples and anvil forming grooves.

Background technique

In laparoscopic surgery and thoracoscopic surgery, laparoscopic cutting stapler is usually used for cutting and anastomosis of esophagus, stomach, duodenum, small intestine, colon, rectum, appendix, gallbladder, pancreas and spleen in the digestive tract, It is also used in cutting and anastomotic operations such as the lung and trachea in the respiratory tract, and in the bladder and uterus in the urogenital system. Through its application, it can greatly reduce the surgical wound, shorten the operation time and improve the quality of the operation.

In the process of actually using the stapler, it is necessary to ensure the consistency of the relative positions of the staple cartridge and the staple anvil, thereby ensuring the alignment accuracy of the staple position relative to the staple forming groove. In the prior art, first, the staple cartridge and the staple cartridge frame are fixed, and then as a whole, the pin shaft is used to realize the assembly and molding with the nail anvil. There are pin holes (as shown in Figure 1). However, this assembly method requires the pin hole to have high positional accuracy, and requires the pin shaft to have strict assembly accuracy relative to the pin hole, which greatly increases the difficulty of dimensional chain calculation and manufacturing work, resulting in poor product yield. lower. Therefore, it is urgent for technicians to solve the above problems.

Contents of the invention

The technical problem to be solved by the present invention is to provide a stapler with simple structural design, easy assembly, and good alignment accuracy between the staple cartridge and the anvil.

In order to solve the above technical problems, the present invention relates to a stapler with an automatic alignment device for staples and anvil forming grooves, including a staple cartridge, a staple cartridge rack, an anvil and an adapter; wherein, the staple cartridge and the staple cartridge rack The phase is fixed to form the first assembly body, and is opposite to the nail anvil. A nail forming groove is arranged on the nail anvil. The adapter, the staple cartridge frame and the staple anvil are hinged as one by means of pin shafts. There is a clearance fit between the pin shaft and the matching pin hole. A positioning protrusion is provided on the first assembly, and correspondingly, a positioning groove matching the positioning protrusion is provided on the nail anvil.

As a further improvement of the technical solution disclosed in the present invention, the positioning protrusion is arranged on the staple cartridge rack.

Of course, as another modification of the above technical solution, the positioning protrusions can also be arranged on the staple cartridge.

As a further improvement of the technical solution disclosed in the present invention, a guiding slope is provided on the positioning protrusion.

As a further improvement of the technical solution disclosed in the present invention, an anti-deflection abutting portion is provided between the first assembly body and the nail anvil.

As a further improvement of the technical solution disclosed in the present invention, the anti-deflection abutment part is an abutment boss arranged on the front and rear outer sidewalls of the staple cartridge rack and arranged around the pin holes.

Certainly, the above-mentioned anti-deflection abutting portion may also be an abutting boss arranged on the front and rear inner side walls of the nail anvil and arranged around the upper pin hole.

As a further improvement of the technical solution disclosed in the present invention, the pin holes opened on the first assembly body are circular holes, and correspondingly, the pin holes opened on the nail anvil are waist-shaped holes extending along the left and right directions.

Of course, as another modification of the above-mentioned technical solution, the pin holes set on the nail anvil can also be circular holes, and correspondingly, the pin holes set on the first assembly body are waist-shaped holes, also along the direction to extend.

Compared with the traditionally designed stapler, by adopting the technical solution disclosed in the present invention, the positioning protrusion can be automatically introduced into the positioning groove during the rotation and closing process of the staple cartridge relative to the anvil, which ensures that the staple phase For the alignment accuracy of the nail forming groove, at the same time, the staple cartridge is forced to perform adaptive displacement adjustments in the left, right, front and rear directions relative to the nail anvil.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic perspective view of a stapler in the prior art.

Fig. 2 is a three-dimensional schematic diagram of a stapler with an automatic alignment device for staples and anvil forming grooves in the present invention.

Fig. 3 is a main view of the stapler with an automatic alignment device for staples and anvil forming grooves in the present invention (jaws open state).

Fig. 4 is a main view of the stapler with an automatic alignment device for staples and anvil forming grooves in the present invention (jaws closed state).

Fig. 5 is a cross-sectional view along line A-A of Fig. 4 .

Fig. 6 is a three-dimensional schematic diagram of the staple magazine rack in the stapler provided with the automatic alignment device for staples and anvil forming grooves according to the present invention.

Fig. 7 is a three-dimensional schematic view of the staple cartridge in the stapler with the automatic alignment device for staples and anvil forming grooves according to the present invention.

Fig. 8 is a schematic perspective view of the anvil in the stapler provided with the automatic alignment device for the forming groove of the staple and the anvil according to the present invention.

1-first assembly body; 11-nail cartridge; 111-nail position; 12-nail cartridge frame; 121-positioning protrusion; 122-accommodating groove; 2-nail anvil; 21-positioning groove; ; 3 - adapter; 4 - pin; 5 - anti-deflection abutment; 51 - abutment against boss.

Detailed ways

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "front", "rear", "left", "right" etc. are based on the orientations or positional relationships shown in the drawings, and are only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention.

Below in conjunction with specific embodiments, the content of the present invention will be further described in detail. Figure 2, Figure 3 and Figure 4 respectively show a three-dimensional schematic view of a stapler with an automatic alignment device for staples and anvil forming grooves in the present invention and The front view of the two states of opening and closing is mainly composed of several parts such as the staple cartridge 11, the staple cartridge frame 12, the nail anvil 2 and the adapter 3, wherein the staple cartridge frame 12 is provided with a receiving groove 122 (as shown in FIG. 6) is used to place and fix the above-mentioned staple cartridge 11 to form a whole, which is named as the first assembly body 1 for the convenience of subsequent description. The first assembly body 1 is opposite to the nail anvil 2 . Nail forming grooves 22 (as shown in FIG. 8 ) are arranged on the nail anvil 2 , and correspondingly, nail positions 111 (as shown in FIG. 7 ) are evenly distributed on the opposite surface of the nail cartridge 11 . The adapter 3 , the staple cartridge frame 12 and the staple anvil 2 are hinged as one by means of the pin shaft 4 . A pin hole matching the pin shaft 4 is opened on the first assembly body 1 and the nail anvil 2, and the two are clearance fit. A positioning protrusion 121 is provided on the first assembly body 1 , and correspondingly, a positioning groove 21 matching the positioning protrusion 121 is provided on the anvil 2 . In this way, in the actual operation process, when the stapler is activated, the staple cartridge 11 performs a rotational closing movement relative to the anvil 2 around the central axis of the pin shaft 4, and during this process, the positioning protrusion 121 can be automatically introduced into the positioning recess. In the slot 21 (as shown in Figure 5), at the same time, the staple bin 11 is forced to carry out adaptive displacement adjustment relative to the nail anvil 2 in the left-right direction and the front-rear direction, thereby ensuring that the alignment of the nail position relative to the nail forming groove is accurate sex.

Generally speaking, in consideration of manufacturing convenience and processing cost, the above-mentioned positioning protrusion 121 is preferably disposed on the staple cartridge rack 12 (as shown in FIG. 6 ), and is formed by extending downward from the side wall of the above-mentioned receiving groove 122 . It should be noted here that the positioning protrusion 121 can also be arranged on the staple cartridge 11 according to specific conditions (not shown in the figure).

In order to meet the surgical requirements, the staple cartridge frame 12, the staple cartridge 11 and the staple anvil 2 all need to be provided with a relatively large length-to-width ratio. Therefore, the three are required to have high assembly accuracy at the hinged position. When the assembly clearance is out of tolerance, It is very easy to cause the staple cartridge 11 to be biased forward and backward relative to the anvil 2, and as the size in the length direction increases, the bias value also gradually increases. In order to solve the above-mentioned technical problems, an anti-deflection abutting portion 5 (as shown in FIG. 6 ) can be provided between the first assembly body 1 and the nail anvil 2, thereby ensuring that the nail cartridge rack 12, the nail cartridge 11 and the nail anvil 2 Under the premise of assembly accuracy, reduce the requirements for the dimensional accuracy of each component. The specific implementation plan is recommended as follows: the anti-deflection abutting part 5 is designed in the form of abutting boss 51, which is arranged on the front and rear outer side walls of the staple cartridge rack 12, and is arranged around its own pin hole (as shown in Figure 6) . It should be noted that the abutment boss 51 is generally directly extended from the front and rear side walls of the staple cartridge rack 12, and its thickness is controlled at 0.5-1 mm. Certainly, the abutment boss 51 may also preferably be an elastic rubber pad, which is bonded to the magazine frame 12 (not shown in the figure) by means of glue.

It should be noted that, as a modification of the above-mentioned technical solution, the above-mentioned abutting boss 51 can also be arranged on the front and rear inner side walls of the nail anvil 2 according to specific conditions, and is also arranged around its own pin hole (not shown in the figure). Shows).

Furthermore, a guide slope can also be provided on the positioning protrusion 121, so that the positioning protrusion 121 can be guided into the positioning groove 21, thereby facilitating the adaptive position adjustment of the nail bin 11 during the rotation process relative to the nail anvil 2. .

Generally speaking, the pin holes opened on the first assembly body 1 are preferably set as circular holes, and correspondingly, the pin holes opened on the nail anvil 2 are set as waist-shaped holes, extending along the left and right directions to ensure that the staple cartridge 11 has a sufficient adjustable distance relative to the anvil 2 . Of course, as another transformation of the above-mentioned technical scheme, the pin holes provided on the nail anvil 2 can also be set as circular holes, correspondingly, the pin holes opened on the first assembly body 1 are set as waist-shaped holes, and the same Extend in the left-right direction.

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

Claims (9)

1. A stapler with an automatic alignment device for staples and anvil forming grooves, comprising a staple cartridge, a staple cartridge frame, an anvil and an adapter; wherein, the staple cartridge and the staple cartridge frame are fixed to form a second An assembly, which is opposite to the nail anvil; a nail forming groove is arranged on the nail anvil; the adapter, the nail magazine frame and the nail anvil are hinged as a whole by means of a pin shaft, and It is characterized in that the pin shaft and the matching pin hole are clearance fit; a positioning protrusion is provided on the first assembly body; The protrusions match the positioning grooves. 2 . The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 1 , wherein the positioning protrusions are arranged on the staple cartridge rack. 3 . 3 . The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 1 , wherein the positioning protrusion is arranged on the staple cartridge. 4 . 4. The stapler with an automatic alignment device for staples and anvil forming grooves according to any one of claims 1-3, wherein a guiding slope is provided on the positioning protrusion. 5. The stapler with an automatic alignment device for staples and anvil forming grooves according to any one of claims 1-3, characterized in that, an anastomotic is provided between the first assembly and the anvil There is an anti-deflection top resting part. 6. The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 5, characterized in that, the anti-deflection abutment part is arranged on the front and rear outer side walls of the staple magazine frame, And the abutting boss arranged around the pin hole thereon. 7. The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 5, wherein the anti-deflection abutting portion is arranged on the front and rear inner side walls of the anvil, and an abutment boss arranged around the pin hole. 8. The stapler with an automatic alignment device for staples and anvil forming grooves according to any one of claims 1-3, wherein the pin holes opened on the first assembly body are circular Correspondingly, the pin holes provided on the anvil are waist-shaped holes extending along the left and right directions. 9. The anastomat with an automatic alignment device for staples and anvil forming grooves according to any one of claims 1-3, wherein the pin holes provided on the anvil are circular holes, Correspondingly, the pin holes opened on the first assembly body are waist-shaped holes extending along the left and right directions.