WO2021047365A1

WO2021047365A1 - Anastomat comprising device for automatic alignment of anastomat stapler and stapler anvil shaping groove

Info

Publication number: WO2021047365A1
Application number: PCT/CN2020/110245
Authority: WO
Inventors: 舒拓
Original assignee: 康奇舒宁(苏州)医疗科技有限公司; 舒拓
Priority date: 2019-09-11
Filing date: 2020-08-20
Publication date: 2021-03-18
Also published as: CN110420042A

Abstract

Disclosed is an anastomat comprising a device for automatic alignment of an anastomat stapler and a stapler anvil shaping groove, comprising a stapler compartment (11), a stapler compartment frame (12), a stapler anvil (2) and an adapter (3); wherein the stapler compartment (11) and the stapler compartment frame (12) are fixed together to form a first assembly (1), which is disposed opposite the stapler anvil (2). A staple shaping groove (22) is configured on the stapler anvil (2). The adapter (3), stapler compartment frame (12) and stapler anvil (2) are hinged together by a pin shaft (4). The pin shaft (4) has a clearance fit with a matching pin hole. A positioning protrusion (121) is configured on the first assembly (1), and accordingly, a positioning groove (21) matching the positioning protrusion (121) is configured on the stapler anvil (2). Thus, when the stapler compartment (11) is rotationally closed towards the stapler anvil (2), the positioning protrusion (121) automatically enters the positioning groove (21), which ensures the accuracy of alignment of the anastomat stapler with the staple shaping groove (22), and at the same time forces the stapler compartment (11) to make an adaptive adjustment by moving transversely and longitudinally with respect to the stapler anvil (2).

Description

Anastomat with automatic alignment device for anastomotic nail and nail anvil forming groove

Technical field

The invention relates to the technical field of medical device manufacturing, in particular to an anastomat with an automatic alignment device for an anastomotic nail and an anvil forming groove.

Background technique

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

In the actual use of 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, firstly, the staple cartridge is fixed to the staple cartridge frame, and then as a whole, the pin is used as a whole to realize the assembly and molding with the staple anvil. Accordingly, the staple cartridge frame and the corresponding side wall of the staple anvil are provided There are pin holes (as shown in Figure 1). However, this kind of assembly method requires the pin hole to have high position 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 product yield Lower. Therefore, technical personnel are urgently required to solve the above-mentioned problems.

Summary of the invention

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

In order to solve the above technical problems, the present invention relates to an anastomotic device with an automatic alignment device for staples and staple anvil forming grooves, which includes a staple cartridge, a staple cartridge holder, a staple anvil and an adapter; among them, the staple cartridge and the staple cartridge holder The first assembly is formed by being fixed to each other, and is opposite to the nail anvil. A nail forming groove is provided on the nail anvil. The adapter, the nail magazine frame and the nail anvil are hinged into one body by means of a pin shaft. 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 adapted to the positioning protrusion is opened on the nail anvil.

As a further improvement of the technical solution disclosed in the present invention, positioning protrusions are 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 inclined surface is provided on the positioning protrusion.

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

Of course, the anti-deflection abutting portion can also be a 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 hole opened on the first assembly is a circular hole. Correspondingly, the pin hole opened on the nail anvil is a waist-shaped hole extending along the left and right directions.

Of course, as another modification of the above technical solution, the pin hole opened on the nail anvil can also be a circular hole. Correspondingly, the pin hole opened on the first assembly is a waist-shaped hole, which is also along the left and right sides. Direction to extend.

Compared with the stapler of the traditional design structure, by adopting the technical solution disclosed in the present invention, the positioning protrusion can be automatically introduced into the positioning groove during the process of rotating and closing the staple cartridge relative to the staple anvil, that is, the staple phase is ensured For the positioning accuracy of the nail forming groove, at the same time, the nail cartridge is forced to adjust the adaptive displacement in the left-right direction and the front and back relative to the nail anvil.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a three-dimensional schematic diagram of a stapler in the prior art.

Fig. 2 is a three-dimensional schematic diagram of the stapler with the automatic positioning device of the staple and the nail anvil forming groove in the present invention.

Fig. 3 is the main view of the stapler with the automatic positioning device of the staple and the nail anvil forming groove in the present invention (the jaws are open state).

Fig. 4 is the main view of the stapler with the automatic positioning device of the staple and the anvil forming groove in the present invention (the jaws are closed state).

Fig. 5 is a cross-sectional view taken along the line A-A in Fig. 4.

Fig. 6 is a three-dimensional schematic view of the staple cartridge rack in the stapler with the automatic positioning device of the staple and the staple anvil forming groove of the present invention.

Fig. 7 is a three-dimensional schematic diagram of the staple cartridge in the stapler with the automatic positioning device of the staple and the staple anvil forming groove of the present invention.

Fig. 8 is a three-dimensional schematic diagram of the staple anvil in the stapler with the automatic positioning device of the staple and the anvil forming groove of the present invention.

1- first assembly; 11- nail magazine; 111- nail position; 12- nail magazine rack; 121- positioning protrusion; 122- receiving groove; 2- nail anvil; 21- positioning groove; 22- nail forming groove ; 3-Adapter; 4-pin shaft; 5-anti-deflection abutment part; 51- abutment boss.

detailed description

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the present invention and simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

In the following, the content of the present invention will be further described in detail with reference to specific embodiments. Figures 2, 3, and 4 respectively show a three-dimensional schematic diagram of an anastomat with an automatic positioning device for an anvil and an anvil in the present invention. The front view of the two states of opening and closing is mainly composed of the staple cartridge 11, the staple cartridge rack 12, the staple anvil 2 and the adapter 3, among which a receiving groove 122 is provided on the staple cartridge rack 12 (as shown in the figure). 6), which is used to place and fix the above-mentioned staple cartridge 11 to form a whole. For the convenience of the following description, it is named the first assembly 1. The first assembly 1 and the nail anvil 2 are placed opposite to each other. A nail forming groove 22 is provided on the nail anvil 2 (as shown in FIG. 8), and correspondingly, nail positions 111 are uniformly distributed on the opposite surface of the nail cartridge 11 (as shown in FIG. 7). The adapter 3, the staple cartridge frame 12 and the staple anvil 2 are hinged into one body by means of a pin 4. The first assembly body 1 and the nail anvil 2 are provided with pin holes matching the pin shaft 4, and the two are in clearance fit. A positioning protrusion 121 is provided on the first assembly body 1, and correspondingly, a positioning groove 21 that is adapted to the positioning protrusion 121 is opened on the nail anvil 2. In this way, in the actual operation process, when the stapler is activated, the staple cartridge 11 rotates and closes with respect to the staple anvil 2 around the central axis of the pin shaft 4. During this process, the positioning protrusion 121 can be automatically guided into the positioning recess. In the groove 21 (as shown in Fig. 5), at the same time, the staple cartridge 11 is forced to undergo an adaptive displacement adjustment in the left-right direction and the front-rear direction relative to the nail anvil 2, thereby ensuring accurate positioning of the nail position relative to the nail forming groove Sex.

Generally speaking, in consideration of manufacturing convenience and processing cost, the positioning protrusion 121 is preferably disposed on the staple cartridge rack 12 (as shown in FIG. 6), and is formed by downward extension of the side wall of the 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 rack 12, the staple cartridge 11, and the staple anvil 2 need to be provided with a larger length-to-width ratio. Therefore, the three are required to have high assembly accuracy at the hinged position. When the assembly gap is out of tolerance, It is very easy to cause the staple cartridge 11 to be biased back and forth relative to the staple anvil 2, and as the lengthwise dimension increases, the bias value gradually increases. In order to solve the above technical problems, an anti-deflection abutment 5 (as shown in FIG. 6) may be provided between the first assembly 1 and the nail anvil 2, so as to ensure that the nail magazine rack 12, the nail magazine 11, and the nail anvil 2 Under the premise of assembly accuracy, reduce the requirements for the dimensional accuracy of each component itself. The specific implementation proposal is recommended as follows: the anti-deflection abutment portion 5 is designed in the form of abutment 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 holes (as shown in Fig. 6) . It should be noted that the abutting boss 51 is generally formed by directly extending the front and rear side walls of the staple cartridge frame 12, and its thickness is controlled within 0.5-1 mm. Of course, the supporting boss 51 can also be preferably an elastic rubber pad, which is adhered to the staple cartridge rack 12 by means of glue (not shown in the figure).

It should be noted that, as a modification of the above 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 the specific situation, and also arranged around its own pin hole (not shown in the figure). show).

Furthermore, it is also possible to provide a guiding inclined surface on the positioning protrusion 121, so that the positioning protrusion 121 can be introduced into the positioning groove 21, thereby facilitating the adaptive position adjustment of the staple cartridge 11 relative to the nail anvil 2 during the rotation process. .

Generally speaking, the pin holes opened on the first assembly body 1 are preferably set as circular holes. 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 the staple cartridge 11 has a sufficient adjustable distance relative to the nail anvil 2. Of course, as another variation of the above technical solution, the pin hole on the nail anvil 2 can also be set as a circular hole. Correspondingly, the pin hole on the first assembly 1 is set as a waist-shaped hole. Extend along the left and right directions.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and novel features disclosed in this document.

Claims

An anastomat with an automatic positioning device for anastomotic nails and nail anvil forming grooves, comprising a nail magazine, a nail magazine rack, a nail anvil, and an adapter; wherein the nail magazine and the nail magazine rack are fixed to form a first assembly The nail anvil is provided with a nail forming groove; the adapter, the nail magazine rack, and the nail anvil are hinged into one body by means of a pin, characterized in that , 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, the nail anvil is provided with the positioning protrusion Suitable positioning groove.
The stapler with an automatic alignment device for the staple and anvil forming groove according to claim 1, wherein the positioning protrusion is arranged on the staple cartridge frame.
The stapler with an automatic alignment device for the staple and anvil forming groove according to claim 1, wherein the positioning protrusion is arranged on the staple cartridge.
The anastomat with an automatic alignment device for the staple and the anvil forming groove according to any one of claims 1 to 3, wherein a guide inclined surface is provided on the positioning protrusion.
The stapler with an automatic alignment device for the staple and anvil forming grooves according to any one of claims 1-3, wherein a guard is provided between the first assembly and the anvil. Deflection of the abutment part.
The stapler with an automatic alignment device for staple and anvil forming grooves according to claim 5, wherein the anti-deflection abutment portion is arranged on the front and rear outer side walls of the staple cartridge frame and surrounds Abutting boss on which the pin holes are arranged.
The stapler with the automatic alignment device for the staple and the anvil forming groove according to claim 5, wherein the anti-deflection abutment portion is arranged on the front and rear inner side walls of the anvil and surrounds the anvil. The pin holes are arranged against the boss.
The anastomat with an automatic positioning device for the staple and anvil forming grooves according to any one of claims 1 to 3, wherein the pin hole opened on the first assembly is a circular hole, Correspondingly, the pin hole opened on the nail anvil is a waist-shaped hole extending along the left and right directions.
The stapler with an automatic alignment device for the staple and the anvil forming groove according to any one of claims 1-3, wherein the pin hole opened on the anvil is a circular hole corresponding to , The pin hole opened on the first assembly body is a waist-shaped hole extending along the left and right direction.