A stapler with an automatic alignment device for stapler and staple anvil forming groove

Abstract

The present invention relates to a stapler with an automatic alignment device for staples and anvil forming grooves, comprising a staple magazine, a staple magazine frame, an anvil and an adapter; wherein the staple magazine and the staple magazine frame are fixed to form a first assembly, and are arranged opposite to the anvil. A staple forming groove is provided on the anvil. The adapter, the staple magazine frame and the anvil are hinged as a whole 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, and correspondingly, a positioning groove matched with the positioning protrusion is provided on the anvil. In this way, during the process of the staple magazine rotating and closing relative to the anvil, the positioning protrusion can be automatically introduced into the positioning groove, that is, the alignment accuracy of the nail position relative to the nail forming groove is ensured, and at the same time, the staple magazine is forced to perform adaptive displacement adjustment relative to the anvil along the left-right direction and the front-back direction.

Description

Technical Field

[0001] The invention relates to the technical field of medical device manufacturing, in particular to a stapler with an automatic alignment device for staples and staple anvil forming grooves. Background Art

[0002] In laparoscopic surgery and thoracoscopic surgery, laparoscopic cutting and 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, and also for cutting and anastomosis of lung and trachea in the respiratory tract, and for cutting and anastomosis of bladder and uterus in the genitourinary system. Its application can greatly reduce surgical wounds, shorten operation time and improve operation quality.

[0003] In the actual use of the stapler, the consistency of the relative positions of the stapler and the anvil must be ensured, so as to ensure the accuracy of the alignment of the staple position relative to the staple forming groove. In the prior art, the stapler is first fixed to the stapler frame, and then assembled with the anvil as a whole by using a pin shaft. Accordingly, pin holes (such as Figure 1 However, this assembly method requires the pin hole to have a high position accuracy, and requires the pin shaft to have a strict assembly accuracy relative to the pin hole, which greatly increases the difficulty of dimensional chain calculation and manufacturing work, resulting in a low product yield. Therefore, it is urgent for technicians to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a stapler which has a simple structural design, is easy to assemble, and ensures that the staple cartridge has good alignment accuracy relative to the staple anvil.

[0005] In order to solve the above technical problems, the present invention relates to a stapler with an automatic alignment device for stapler and anvil forming grooves, comprising a staple magazine, a staple magazine frame, an anvil and an adapter; wherein the staple magazine and the staple magazine frame are fixed to form a first assembly, and are arranged opposite to the anvil. A staple forming groove is provided on the anvil. The adapter, the staple magazine frame and the anvil are hinged together 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, and correspondingly, a positioning groove matching the positioning protrusion is provided on the anvil.

[0006] As a further improvement of the technical solution disclosed in the present invention, a positioning protrusion is arranged on the nail magazine frame.

[0007] Of course, as another modification of the above technical solution, the positioning protrusion can also be arranged on the nail magazine.

[0008] As a further improvement of the technical solution disclosed in the present invention, a guiding inclined surface is provided on the positioning protrusion.

[0009] As a further improvement of the technical solution disclosed in the present invention, an anti-deflection supporting portion is provided between the first assembly body and the nail anvil.

[0010] As a further improvement of the technical solution disclosed in the present invention, the anti-deflection supporting portion is a supporting boss which is provided on the front and rear outer side walls of the nail magazine frame and arranged around the pin hole thereof.

[0011] Of course, the anti-deflection supporting portion may also be a supporting boss provided on the front and rear inner side walls of the anvil and arranged around the pin hole thereon.

[0012] As a further improvement of the technical solution disclosed in the present invention, the pin hole provided on the first assembly body is a circular hole, and correspondingly, the pin hole provided on the anvil is a waist-shaped hole extending along the left-right direction.

[0013] Of course, as another modification of the above technical solution, the pin hole provided on the anvil may also be a circular hole, and correspondingly, the pin hole provided on the first assembly body is a waist-shaped hole, which also extends in the left-right direction.

[0014] Compared with staplers of traditional design structures, by adopting the technical solution disclosed in the present invention, during the process of rotating and closing the nail magazine relative to the nail anvil, the positioning protrusion can be automatically introduced into the positioning groove, thereby ensuring the accuracy of the positioning of the nail position relative to the nail forming groove. At the same time, the nail magazine is forced to perform adaptive displacement adjustment relative to the nail anvil in the left and right directions and front and back. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional schematic diagram of a stapler in the prior art.

[0017] Figure 2 It is a three-dimensional schematic diagram of the stapler with an automatic alignment device for staples and staple anvil forming grooves in the present invention.

[0018] Figure 3 It is a main view of the stapler with an automatic alignment device for staples and staple anvil forming grooves according to the present invention (jaws open state).

[0019] Figure 4 It is a main view of the stapler with an automatic alignment device for staples and staple anvil forming grooves according to the present invention (jaws closed state).

[0020] Figure 5 yes Figure 4 AA section view.

[0021] Figure 6 The present invention is a three-dimensional schematic diagram of a stapler stapler magazine frame with an automatic alignment device for staples and staple anvil forming grooves.

[0022] Figure 7 The present invention is a three-dimensional schematic diagram of a stapler cartridge in a stapler having an automatic alignment device for staples and staple anvil forming grooves.

[0023] Figure 8 The present invention is a three-dimensional schematic diagram of an anvil in a stapler having an automatic alignment device for staples and anvil forming grooves.

[0024] 1-first assembly; 11-nail magazine; 111-nail position; 12-nail magazine frame; 121-positioning protrusion; 122-accommodating groove; 2-nail anvil; 21-positioning groove; 22-nail forming groove; 3-adapter; 4-pin shaft; 5-anti-deflection support portion; 51-support boss. DETAILED DESCRIPTION

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] The present invention will be further described in detail below with reference to specific embodiments. Figure 2 , Figure 3 as well as Figure 4 The three-dimensional schematic diagram of the stapler with the automatic alignment device for staple and anvil forming grooves of the present invention and the front view of the stapler in the open and closed states are respectively shown. The stapler mainly consists of a staple magazine 11, a staple magazine frame 12, a staple anvil 2 and an adapter 3. Among them, a receiving groove 122 (such as Figure 6 ), is used to place and fix the nail magazine 11 to form a whole, which is named as the first assembly 1 for the convenience of subsequent description. The first assembly 1 is arranged opposite to the nail anvil 2. The nail anvil 2 is provided with a nail forming groove 22 (as shown in FIG. Figure 8 ), accordingly, nail positions 111 are evenly distributed on the opposite sides of the nail magazine 11 (as shown in Figure 7As shown in ). The adapter 3, the staple magazine rack 12 and the nail anvil 2 are hinged as a whole by means of the pin shaft 4. Pin holes that match the pin shaft 4 are provided on the first assembly body 1 and the nail anvil 2, and the two are clearance-matched. A positioning protrusion 121 is provided on the first assembly body 1, and correspondingly, a positioning groove 21 that matches the positioning protrusion 121 is provided on the nail anvil 2. In this way, during actual operation, when the stapler is stimulated, the nail magazine 11 performs a rotational closing movement relative to the nail anvil 2 around the central axis of the pin shaft 4. During this process, the positioning protrusion 121 can be automatically introduced into the positioning groove 21 (as shown in ). Figure 5 At the same time, the nail magazine 11 is forced to perform adaptive displacement adjustment relative to the nail anvil 2 along the left-right direction and the front-back direction, thereby ensuring the alignment accuracy of the nail position relative to the nail forming groove.

[0027] Generally speaking, for the sake of manufacturing convenience and processing cost, the positioning protrusion 121 is preferably disposed on the nail magazine frame 12 (such as Figure 6 As shown in the figure), it is formed by the side wall of the above-mentioned receiving groove 122 extending downward. It should be noted here that the positioning protrusion 121 can also be arranged on the nail magazine 11 according to specific circumstances (not shown in the figure).

[0028] In order to meet the surgical requirements, the nail magazine frame 12, the nail magazine 11 and the nail anvil 2 are all required to have a large length-to-width ratio. Therefore, the three are required to have a high assembly accuracy at the hinged position. When the assembly gap is out of tolerance, it is very easy to cause the nail magazine 11 to be offset forward and backward relative to the nail anvil 2, and as the length direction dimension increases, the offset value gradually increases. In order to solve the above technical problems, an anti-deflection support portion 5 (such as Figure 6 As shown in FIG. 1 , the requirements for the dimensional accuracy of each component are reduced while ensuring the assembly accuracy of the nail magazine frame 12, the nail magazine 11 and the nail anvil 2. The specific implementation scheme is recommended as follows: the anti-deflection support portion 5 is designed in the form of a support boss 51, which is arranged on the front and rear outer side walls of the nail magazine frame 12 and is arranged around its own pin hole (as shown in FIG. Figure 6 It should be noted that the abutting boss 51 is generally formed by directly extending the front and rear side walls of the nail magazine frame 12, and its thickness is controlled to be 0.5-1mm. Of course, the abutting boss 51 can also be preferably an elastic rubber pad, which is bonded to the nail magazine frame 12 by glue (not shown in the figure).

[0029] It should be noted that, as a modification of the above technical solution, the above-mentioned abutment boss 51 can also be arranged on the front and rear inner side walls of the anvil 2 according to specific circumstances, and also arranged around its own pin hole (not shown in the figure).

[0030] Furthermore, a guiding slope may be provided on the positioning protrusion 121 , so that the positioning protrusion 121 is facilitated to be introduced into the positioning groove 21 , thereby facilitating adaptive position adjustment of the nail magazine 11 relative to the nail anvil 2 during its rotation.

[0031] Generally speaking, the pin hole provided on the first assembly body 1 is preferably set as a circular hole, and correspondingly, the pin hole provided on the nail anvil 2 is set as a waist-shaped hole, which extends along the left-right direction, so as to ensure that the nail magazine 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 provided on the nail anvil 2 can also be set as a circular hole, and correspondingly, the pin hole provided on the first assembly body 1 is set as a waist-shaped hole, which also extends along the left-right direction.

[0032] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stapler with an automatic alignment device for staples and staple anvil forming grooves, comprising a staple magazine, a staple magazine frame, a staple anvil and an adapter; wherein: The nail magazine and the nail magazine frame are fixed to form a first assembly, and are arranged 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 there is a clearance fit between the pin shaft and the matching pin hole; a positioning protrusion is arranged on the first assembly, and correspondingly, a positioning groove adapted to the positioning protrusion is opened on the nail anvil, when the stapler is stimulated, the nail magazine performs a rotational closing movement around the central axis of the pin shaft relative to the nail anvil, and in this process, the positioning protrusion can be automatically introduced into the positioning groove, and at the same time, the nail magazine is forced to perform adaptive displacement adjustment relative to the nail anvil along the left and right directions and the front and back directions.

2. The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 1, characterized in that: The positioning protrusion is arranged on the nail magazine frame.

3. The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 1, characterized in that: The positioning protrusion is arranged on the nail magazine.

4. The stapler with an automatic alignment device for staples and anvil forming grooves according to any one of claims 1 to 3, characterized in that: A guiding inclined surface is arranged on the positioning protrusion.

5. The stapler with an automatic positioning device for staples and anvil forming grooves according to any one of claims 1 to 3, characterized in that: An anti-deflection abutment portion is provided between the first assembly body and the anvil.

6. The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 5, characterized in that: The anti-deflection supporting portion is a supporting boss which is arranged on the front and rear outer side walls of the nail magazine frame and is arranged around the pin hole thereon.

7. The stapler with an automatic alignment device for staples and anvil forming grooves according to claim 5, characterized in that: The anti-deflection supporting part is a supporting boss which is arranged on the front and rear inner side walls of the anvil and is 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 to 3, characterized in that: The pin hole formed on the first assembly body is a circular hole, and correspondingly, the pin hole formed on the anvil is a waist-shaped hole extending in the left-right direction.

9. The stapler with an automatic positioning device for staples and anvil forming grooves according to any one of claims 1 to 3, characterized in that: The pin hole formed on the anvil is a circular hole, and correspondingly, the pin hole formed on the first assembly body is a waist-shaped hole extending along the left-right direction.

Images