CN216317768U

CN216317768U - Cutting knife assembly for endoscope anastomat

Info

Publication number: CN216317768U
Application number: CN202122749094.0U
Authority: CN
Inventors: 樊金成; 袁栋坤; 付宾章; 俞滨; 董镔; 戴云星; 任程
Original assignee: JIANGSU QIANJING MEDICAL EQUIPMENT CO Ltd
Current assignee: JIANGSU QIANJING MEDICAL EQUIPMENT CO Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-19
Anticipated expiration: 2031-11-10

Abstract

The utility model relates to a cutting knife component for an endoscope anastomat, which comprises a knife head; the single first push blade and at least one second push blade are arranged side by side, and the front ends of the first push blade and the second push blade are connected with the cutter head; the expansion-preventing pins penetrate through the first push blade and the second push blade, and caps at two ends of the expansion-preventing pins are respectively abutted against the first push blade and the second push blade on the side so as to lock the push blades in the thickness direction; the pin holes in the second push blades are all waist-shaped holes, and avoidance gaps exist between the pin holes and the anti-expansion pins penetrating through the pin holes. Through adopting the anti-expansion pin to fasten and connect between each push blade of the push blade and matching with the middle push blade and the waist-shaped hole on one side push blade, when the anastomotic device bends or the cutter head meets large cutting resistance, the higher holding force is provided, so that each push blade of the push blade does not expand.

Description

Cutting knife assembly for endoscope anastomat

Technical Field

The utility model relates to the field of medical equipment, in particular to a cutting knife assembly for an endoscope anastomat.

Background

The cutting knife assembly in the existing endoscope anastomat comprises four push knife blades 21 and a knife head 22, as shown in fig. 1, the four push knife blades 21 are arranged side by side in the past, and then the front end of the four push knife blades is connected with the knife head 22; in the prior art, the four pushing blades 21 are arranged side by side, so that the pushing blades 21 are in danger of expanding when the anastomotic device bends or the cutter head 22 encounters a large cutting resistance.

In addition, as shown in fig. 2, the tool bit 22 is designed by a large-area metal tool bit and two wear pads 23, so as to achieve the purposes of cutting and wear resistance; wherein, the area of the abrasion-proof pad 23 is too small, the friction force is large, the abrasion-proof effect is not ideal, the risk of falling off exists in the operation process, the injection molding difficulty is large, and the production is inconvenient.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: overcome prior art's not enough, provide a cutting knife subassembly for chamber mirror anastomat, solve in the past in the cutting knife subassembly when the apparatus that coincide turns or the tool bit meets the problem that the broach piece has the expansion when great cutting resistance.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

provides a cutting knife component for an endoscope anastomat, which comprises

A cutter head;

the single first push blade and at least one second push blade are arranged side by side, and the front ends of the first push blade and the second push blade are connected with the cutter head;

the expansion-preventing pins penetrate through the first push blade and the second push blade, and caps at two ends of the expansion-preventing pins are respectively abutted against the first push blade and the second push blade on the side so as to lock the push blades in the thickness direction;

the pin holes in the second push blades are all waist-shaped holes, and avoidance gaps exist between the pin holes and the anti-expansion pins penetrating through the pin holes.

Further, the tool bit comprises a blade and a tool holder;

the tool rest is formed by injection molding of POM plastic;

the front end of the knife rest is provided with a knife groove, and the blade is arranged in the knife groove and is formed by injection molding together with the knife rest.

Furthermore, a dovetail slot is formed in the rear side of the tool rest, a dovetail insertion block is formed at the front end of each push blade, and the dovetail insertion blocks are matched with the dovetail slots so that the tool rest is connected with the push blades.

Furthermore, the upper end surface and the lower end surface of the tool rest are both friction contact surfaces, and the friction contact surfaces are of arc-shaped structures.

The utility model has the beneficial effects that:

according to the cutting knife assembly for the endoscope anastomat, the push blades of the push blade are fixedly connected through the expansion-proof pins and matched with the middle push blade and the waist-shaped hole in one side push blade, and when an anastomosis instrument bends or a knife head meets large cutting resistance, high holding force is achieved, and the push blades of the push blade do not expand.

The tool bit is formed by injection molding of the tool rest and the blade made of POM plastic, and the friction force of the tool bit is reduced by virtue of the self-lubricating property of the POM plastic; the arc-shaped sliding friction surface enables the cutter head to obtain better wear resistance, and the risk of falling off of the wear-resistant pad is avoided; the molding effect is good, the injection molding difficulty is reduced, and the production efficiency is improved.

Drawings

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a push blade in a cutter assembly for a conventional endoscopic stapler;

FIG. 2 is a schematic structural diagram of a cutter head in a cutter assembly for a prior endoscopic stapler;

FIG. 3 is a schematic view of a cutting knife assembly for the endoscopic stapler of the present invention;

FIG. 4 is a schematic view of a cutter head in the cutter assembly for the endoscopic stapler according to the present invention;

FIG. 5 is a schematic view of a push blade of the cutter assembly for an endoscopic stapler according to the present invention;

wherein the content of the first and second substances,

21. a push blade 22, a cutter head 23 and a wear pad;

31. a first push blade 311, a first pin hole;

32. a second push blade, 321, a second pin hole;

4. an anti-expansion pin;

5. a holder 51, a blade 52, a friction contact surface.

Detailed Description

The utility model will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 3 and 4, the cutting knife component for the endoscopic stapler comprises a knife head;

the cutter comprises a single first push blade 31 and at least one second push blade 32, wherein the first push blade 31 and the second push blade 32 are arranged side by side, and the front ends of the first push blade 31 and the second push blade 32 are connected with a cutter head;

the expansion-preventing pins 4 penetrate through the first push blade pieces 31 and the second push blade pieces 32, and caps at two ends of the expansion-preventing pins 4 are respectively abutted against the first push blade pieces 31 and the second push blade pieces 32 located on the side so as to lock the push blade pieces in the thickness direction;

the pin holes of the second push blade pieces 32 are all waist-shaped holes, and an avoidance gap exists between the pin holes and the expansion-preventing pins 4 penetrating through the pin holes.

In the present embodiment, the number of the second push blade pieces 32 is three.

In this embodiment, the pin holes of the first pushing blade are first pin holes 311, the pin holes of the second pushing blade 32 are second pin holes 321, the first pin holes 311 are round holes, and the second pin holes 321 are kidney-shaped holes.

Specifically, as an alternative embodiment in this embodiment, as shown in fig. 5, the cutter head includes a blade 51 and a cutter holder 5;

the tool rest 5 is formed by injection molding of POM plastic;

the front end of the knife rest 5 is provided with a knife groove, and the blade 51 is arranged in the knife groove and is formed by injection molding together with the knife rest 5.

In the embodiment, the POM plastic has good self-lubricating property, so that the friction force of the tool bit is reduced.

Specifically, as an optional implementation manner in this embodiment, as shown in fig. 5, a dovetail slot is formed on the rear side of the tool holder 5, a dovetail insertion block is formed at the front end of each push blade, and the dovetail insertion block is matched with the dovetail slot, so that the tool holder 5 is connected with each push blade.

Specifically, as an alternative embodiment in this embodiment, as shown in fig. 5, both the upper end surface and the lower end surface of the tool holder 5 are friction contact surfaces 52, and the friction contact surfaces 52 have an arc-shaped structure.

The arc-shaped structure increases the area of the friction contact surface 52, so that the cutter head obtains better wear resistance without the risk of falling off of the wear-resistant pad; the molding effect is good, the injection molding difficulty is reduced, and the production efficiency is improved.

The cutting knife assembly for the endoscope anastomat is improved by aiming at the push knife blades, the four push knife blades are locked in the thickness direction by adopting the expansion-preventing pins 4, and meanwhile, the pin holes in the second push knife blades 32 are designed to be waist-shaped holes, so that when each push knife blade is bent, each second push knife blade 32 and the expansion-preventing pins 4 are avoided by means of moving gaps, and the bending is realized.

Secondly, the tool bit part omits a wear pad, the tool rest 5 is directly injection molded by POM plastic with good self-lubricating property, and the blade 51 and the tool rest 5 are integrally injection molded without the risk of falling off of the wear pad; the molding effect is good, the injection molding difficulty is reduced, and the production efficiency is improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A cutting knife component for an endoscope anastomat is characterized by comprising

A cutter head;

2. The cutting knife assembly for an endoscopic stapler as defined in claim 1,

the cutter head comprises a blade and a cutter frame;

the tool rest is formed by injection molding of POM plastic;

3. The cutting knife assembly for an endoscopic stapler as defined in claim 2,

the knife rest rear side is opened and is established the forked tail slot, and each push away blade front end forms the forked tail inserted block, forked tail inserted block and forked tail slot cooperation to make the knife rest be connected with each push away blade.

4. The cutting knife assembly for an endoscopic stapler as defined in claim 2,

the upper end surface and the lower end surface of the tool rest are friction contact surfaces, and the friction contact surfaces are arc-shaped structures.