CN218651943U

CN218651943U - Planing cutter and medical planing cutter

Info

Publication number: CN218651943U
Application number: CN202023341835.3U
Authority: CN
Inventors: 王靖翔; 雷保军; 王静雯
Original assignee: SHANGHAI RAYKEEN LASER TECHNOLOGY CO LTD
Current assignee: SHANGHAI RAYKEEN LASER TECHNOLOGY CO LTD
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2023-03-21
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to the technical field of medical instruments, in particular to a planing tool and a medical planing tool, wherein the planing tool comprises an outer tool and an inner tool, wherein the outer tool comprises an outer tool tube and an outer tool bit, and the outer tool bit is provided with an outer window; the inner cutter comprises an inner cutter tube and an inner cutter head, the inner diameter of the inner cutter tube is larger than that of the inner cutter head, and the inner cutter head is provided with an inner window; the inner knife can rotate in the outer knife, and the tissue can be crushed when the inner window is meshed with the outer window. The inner diameter of the inner cutter tube is larger than that of the inner cutter head, so that the inner diameter of the transmission channel of the inner cutter tube is larger than that of the inlet of the inner cutter head, and the resistance of the crushed tissue is reduced after the crushed tissue enters the inner cutter tube from the inner window of the inner cutter head, and the crushed tissue can be extracted out more smoothly. Effectively solves the problem that the inner cutter tube is blocked.

Description

Planing cutter and medical planing cutter

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a planing cutter and medical planer tool.

Background

The medical plane knife is suitable for minimally invasive endoscopic surgery, is used for surgical treatment such as surgery, otorhinolaryngology and the like, and is used for crushing tissues and sucking out the tissues by utilizing negative pressure of the tissues. The planing tool of the medical planing tool consists of an outer tool and an inner tool, the inner tool and the outer tool both comprise a tool tube and tool bits, the inner tool and the outer tool bits are both provided with windows, and when the planing tool works, the inner tool rotates to cut off tissues, and the tissues are sucked into the windows through a negative pressure suction system and then are sucked out of the tool tube, so that the tissues are crushed and cut off.

However, in the using process, the problem that the inner knife tube of the medical plane knife is blocked by tissue fragments often occurs, so that the operation has to be stopped midway, and the operation efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: provides a planing tool, which solves the problem that the planing tool is blocked frequently in the related technology.

In order to achieve the purpose, the utility model adopts the following technical proposal:

in one aspect, the utility model provides a planing tool, this planing tool includes:

the outer cutter comprises an outer cutter tube and an outer cutter head, and the outer cutter head is provided with an outer window;

the inner cutter comprises an inner cutter tube and an inner cutter head, the inner diameter of the inner cutter tube is larger than that of the inner cutter head, and the inner cutter head is provided with an inner window;

the inner knife can rotate in the outer knife, and tissues can be crushed when the inner window is meshed with the outer window.

Optionally, the inner cutter tube has an outer diameter dimension greater than an outer diameter dimension of the inner cutter head.

Optionally, a surface of at least one of the inner and outer blades is provided with a coating for preventing comminuted tissue from adhering to the inner and/or outer blades.

Optionally, the material of the coating is polytetrafluoroethylene.

Optionally, the outer window is located at an end of the outer cutter head away from the outer cutter tube.

Optionally, the outer window is formed by cutting the outer cutter head by a cutting face, and an included angle between the cutting face and a center line of the outer cutter head is 10-15 degrees.

Optionally, the cutting line of the inner window is serrated.

Optionally, the included angle between teeth of the inner window is 60-80 degrees.

Optionally, the outer diameter of the inner knife tube is 0.1-0.2 mm smaller than the inner diameter of the outer knife tube.

On the other hand, the utility model provides a medical plane cutter, including the planing cutter in above-mentioned arbitrary scheme.

The utility model has the advantages that:

the utility model provides a planing tool, this planing tool are greater than the setting of the internal diameter size of interior tool bit through the internal diameter size of interior tool bit for the internal diameter of the transmission passage of interior tool bit is greater than the internal diameter of the entrance of interior tool bit, and by the resistance reduction behind the interior tool bit of the interior window entry of kibbling tissue from interior tool bit, can be taken out more smoothly. Effectively solves the problem that the inner knife tube is blocked, can reduce the workload of a doctor operating the knife and improve the operation efficiency.

Drawings

Fig. 1 is a schematic structural view of a planing tool according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a planing tool according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the inner knife in the embodiment of the present invention.

In the figure:

1. an outer cutter; 11. an outer cutter tube; 12. an outer cutter head; 13. an outer window;

2. inner cutter; 21. an inner cutter tube; 22. an inner cutter head; 23. an inner window; 24. an inner cutter attachment; 25. and a positioning pin.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

Fig. 1 is the schematic structural diagram of the planing tool in the embodiment of the present invention, fig. 2 is the schematic structural diagram of the profile of the planing tool in the embodiment of the present invention, and fig. 3 is the schematic structural diagram of the inner knife in the embodiment of the present invention. As shown in fig. 1-3, the present embodiment provides a planing tool, which includes an outer cutter 1 and an inner cutter 2, wherein the outer cutter 1 includes an outer cutter tube 11 and an outer cutter head 12, and the outer cutter head 12 is provided with an outer window 13; the inner cutter 2 comprises an inner cutter tube 21 and an inner cutter head 22, the inner diameter of the inner cutter tube 21 is larger than that of the inner cutter head 22, and the inner cutter head 22 is provided with an inner window 23; the inner knife 2 can rotate in the outer knife 1, and the tissues can be crushed when the inner window 23 is meshed with the outer window 13. Optionally, the inner diameter of the inner cutter tube 21 is 0.1-0.3 mm, preferably 0.2 mm, larger than the inner diameter of the inner cutter head 22.

In this embodiment, the inner diameter of the inner cutter tube 21 is larger than the inner diameter of the inner cutter head 22, so that the inner diameter of the transmission passage of the inner cutter tube 21 is larger than the inner diameter of the inlet of the inner cutter head 22, and the crushed tissue enters the inner cutter tube 21 from the inner cutter head 22 and then has reduced resistance, so that the crushed tissue can be more smoothly extracted. This setting has effectively solved the problem that interior sword pipe 21 is blockked up, can alleviate operation doctor's work load, improves operation efficiency.

Optionally, the outer diameter of the inner cutter tube 21 is larger than the outer diameter of the inner cutter head 22, and is stepped. The inner window 23 formed by the inner cutter head 22 is smaller due to the arrangement, the size of the crushed tissue is reduced, the mobility of the crushed tissue in the inner cutter tube 21 is improved, and meanwhile, the arrangement enables the matching surface of the inner cutter 2 and the outer cutter 1 to be positioned on the inner cutter tube 21 and the outer cutter tube 11, so that the processing is more convenient.

During the operation, the crushed tissue is easily adhered to the inner blade 2 or the outer blade 1, and the inner blade tube 21 is easily clogged. For this reason, in the present embodiment, the surface of at least one of the inner blade 2 and the outer blade 1 is coated with a coating layer as a protective layer for preventing the pulverized tissue from adhering to the inner blade 2 and/or the outer blade 1. Preferably, the surfaces of the inner blade 2 and the outer blade 1 are both provided with a coating. This arrangement can suppress aggregation and adhesion of the pulverized tissue, and effectively alleviate the problem of clogging of the inner cutter tube 21 or between the inner cutter tube 21 and the outer cutter tube 11.

Preferably, the material of the coating is polytetrafluoroethylene. The material has strong adhesive force with metal base materials such as stainless steel, nickel-titanium alloy and the like, low friction coefficient, self-lubrication and toughness, can continuously work at the temperature of-200-360 ℃, can resist corrosion of various organic solvents, acid, alkali, salt and salt mist, has excellent radiation resistance, dielectric property and chemical stability, resists radiation sterilization, and is nontoxic and conforms to biocompatibility. Of course, in other embodiments, the coating layer may be made of other solid lubricant materials with thermosetting properties. In addition, the effect of preventing the clogging can be also achieved by increasing the smoothness of the inner cutter 2 and the outer cutter 1 by a surface treatment process such as polishing.

Preferably, the outer window 13 is located at an end of the outer cutter head 12 remote from the outer cutter tube 11. The outer window 13 is formed by cutting the outer cutter head 12 by the cutting surface, and the outer window 13 is a slope window, that is, the included angle between the cutting surface and the center line of the outer cutter head 12 is an acute angle, that is, the outer window 13 is inclined along the direction of the center line of the outer cutter head 12 away from the outer cutter tube 11. Further, the included angle between the cutting face and the center line of the outer cutter head 12 is 10-15 degrees, preferably 15 degrees. The arrangement ensures that the opening size of the outer window 13 and the working area formed by the inner window 23 are more suitable, and the doctor can be positioned at a more comfortable position for treating the affected part during the operation.

Preferably, the cutting line of the inner window 23 is zigzag, that is, the edge of the inner window 23 having the cutting function is provided with a plurality of teeth at intervals. Further, the included angle between the teeth is 60 to 80 degrees, preferably 60 degrees. This setting can control the size of the piece that forms behind the cutting tissue, when guaranteeing to smash the tissue for the piece size reduces, changes the discharge, and is unblock. In other embodiments, the included angle between the teeth may be other than 60-80 degrees, such as 10 degrees, 20 degrees, 90 degrees, or 120 degrees.

Optionally, the outer diameter of the inner cutter tube 21 is 0.1-0.2 mm, preferably 0.1 mm, smaller than the inner diameter of the outer cutter tube 11. This is provided with and does benefit to and reduces the processing degree of difficulty.

Optionally, the inner knife 2 further comprises an inner knife connecting member 24, and the inner knife connecting member 24 is disposed at an end of the inner knife tube 21 away from the inner knife head 22 and is used for connecting with an output end of the motor. Furthermore, one end of the inner cutter connecting piece 24, which is far away from the inner cutter head 22, is cylindrical, notches are arranged at intervals on the cylindrical wall of one end of the inner cutter connecting piece 24, which is far away from the inner cutter head 22, a boss is circumferentially arranged at the output end of the motor, the notches and the boss can be mutually spliced, and the spliced boss and the notches can carry out power transmission. Preferably, the inner knife 2 further comprises a positioning pin 25, the positioning pin 25 is arranged at the center of the inner knife connecting piece 24 and extends to the outside of the inner knife connecting piece 24 along the central line direction of the inner knife pipe 21, and the positioning pin 25 is provided to facilitate the mutual insertion and matching of the notch and the boss.

The embodiment also provides a medical plane cutter which comprises the plane cutter in the scheme.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A planing tool, comprising:

the outer cutter (1), the outer cutter (1) includes an outer cutter tube (11) and an outer cutter head (12), the outer cutter head (12) is provided with an outer window (13);

the inner cutter (2), the inner cutter (2) comprises an inner cutter tube (21) and an inner cutter head (22), the inner diameter of the inner cutter tube (21) is larger than that of the inner cutter head (22), and the inner cutter head (22) is provided with an inner window (23);

the inner knife (2) can rotate in the outer knife (1), and the inner window (23) can crush tissues when being meshed with the outer window (13).

2. The planing tool according to claim 1, wherein the outer diameter dimension of the inner cutter tube (21) is larger than the outer diameter dimension of the inner cutter head (22).

3. The planing tool according to claim 1, wherein the surface of at least one of the inner blade (2) and the outer blade (1) is provided with a coating for preventing comminuted tissue from adhering to the inner blade (2) and/or the outer blade (1).

4. A planing tool as claimed in claim 3, characterized in that the material of the coating is polytetrafluoroethylene.

5. The planing tool according to claim 1, wherein the outer window (13) is located at an end of the outer cutter head (12) remote from the outer cutter tube (11).

6. Planing tool according to claim 1, characterized in that the outer window (13) is formed by a cutting face cutting the outer cutter head (12), which cutting face has an angle of 10-15 degrees to the centre line of the outer cutter head (12).

7. Planing tool according to claim 1, characterized in that the cutting line of the inner window (23) is serrated.

8. The planing tool according to claim 7, wherein the included angle between the teeth of the inner window (23) is 60-80 degrees.

9. The planing tool according to claim 1, wherein the outer diameter dimension of the inner cutter tube (21) is 0.1-0.2 mm smaller than the inner diameter dimension of the outer cutter tube (11).

10. A medical planing tool comprising a planing tool according to any of the claims 1 to 9.