CN215739260U

CN215739260U - High-sharpness anti-fracture medullary cavity file

Info

Publication number: CN215739260U
Application number: CN202121950096.XU
Authority: CN
Inventors: 张磊; 倪大山; 王婷婷
Original assignee: Suzhou Arnold Medical Equipment Co ltd
Current assignee: Suzhou Arnold Medical Equipment Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-08
Anticipated expiration: 2031-08-19

Abstract

The utility model discloses a high-sharpness anti-fracture medullary cavity file which comprises a file body, wherein ring teeth and inclined teeth are arranged on the file body, the ring teeth are non-uniformly distributed, and the tooth pitch of the ring teeth is gradually increased from small to large along the head to the tail; a positive rake angle alpha is arranged on the toothed belt of the ring gear; the root of the ring tooth is provided with a chip groove, and the helical teeth are in a segmented wavy design and are non-uniformly distributed from the head to the tail of the file body. The sharpness of the cutting edge of the medullary cavity file is improved, so that a doctor can complete the operation in a labor-saving way; due to the design of the ring teeth which are distributed non-uniformly, stress is effectively dispersed, the risk of fracture of the medullary cavity file is reduced, and the risk of operation is greatly reduced; the wavy inclined teeth which are distributed unevenly enable the medullary cavity file to bear the action of axial force and radial force simultaneously in use, and the fracture risk is reduced.

Description

High-sharpness anti-fracture medullary cavity file

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a high-sharpness anti-fracture medullary cavity file.

Background

The medullary cavity file is a medical knife commonly used in artificial hip joint replacement surgery. The medullary material in the medullary cavity needs to be removed before the prosthesis is fixed, which requires the use of a medullary cavity file. The sharpness of the medullary cavity file directly affects the success rate of the operation. The uniformly distributed tooth pitch adopted by the traditional medullary cavity file has the serious stress concentration due to the relatively small size of the tail section, and has the risk of fracture in the operation process.

Therefore, there is a need for a high sharpness fracture-resistant intramedullary canal file that addresses the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problems and deficiencies of the prior art, it is an object of the present invention to provide a high sharpness fracture resistant intramedullary canal file. The sharpness is high, the cutting groove is arranged and cut smoothly, the risk of fracture is reduced, and the success probability of the operation is improved.

In order to achieve the purpose, the high-sharpness anti-fracture medullary cavity file comprises a file body, wherein ring teeth and inclined teeth are arranged on the file body, the ring teeth are non-uniformly distributed, and the tooth pitch of the ring teeth is gradually increased from small to large from the head to the tail; a positive rake angle alpha is arranged on the toothed belt of the ring gear; the root of the ring tooth is provided with a chip groove, and the helical teeth are in a segmented wavy design and are non-uniformly distributed from the head to the tail of the file body.

The head of the file body is provided with a first annular tooth area which is non-uniformly distributed, wherein the tooth pitch of the annular teeth is increased from 0.8mm to 2.5 mm; the tail part of the file body is provided with a second annular tooth area which is non-uniformly distributed, wherein the tooth pitch of the annular teeth is gradually increased from 2.5mm to 3.0 mm.

Further, the rasp body is divided into a small pitch helical tooth area and a large pitch helical tooth area from the head part to the tail part.

Furthermore, the inclined teeth at the tail part of the file body form an included angle of 55-60 degrees with the horizontal central axis.

Further, the positive rake angle α is 1 ° to 7 °. The positive rake angle alpha is increased, the tooth wall of the ring tooth is thinned, the cutting force is increased, and the sharpness of the medullary cavity file is directly improved. After the sharpness is increased, the physical load of a doctor can be correspondingly reduced, so that the operation can be completed more perfectly. Meanwhile, after the positive rake angle alpha is increased, the capacity of a corresponding chip groove is also increased, so that the chip containing effect is improved. After the chip containing effect is improved, the accumulated chips can be taken out of the medullary cavity when the cutter is pulled out, so that the medullary cavity is convenient to clean.

Furthermore, a clamping groove structure is arranged on the file body, and the clamping handle is fixedly locked with the file body by being embedded into the clamping groove structure; and one side of the clamping groove structure is provided with a positioning groove. The design of the locating slot enables the medullary cavity file to be accurately located when being matched with the handle.

Furthermore, the file body is provided with a nitrided peptide coating. The surface of the file body of the medullary cavity file is added with a titanium nitride coating, so that the surface hardness is improved, and the file is not easy to wear.

According to the technical scheme, the utility model has the beneficial effects that:

the high-sharpness anti-fracture medullary cavity file improves the sharpness of the cutting edge of the medullary cavity file, so that a doctor can complete an operation in a labor-saving manner; due to the design of the ring teeth which are distributed non-uniformly, stress is effectively dispersed, the risk of fracture of the medullary cavity file is reduced, and the risk of operation is greatly reduced; the wavy inclined teeth which are distributed unevenly enable the medullary cavity file to bear the action of axial force and radial force simultaneously in use, and the fracture risk is reduced.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of the present invention

FIG. 3 is a view of the H direction of the present invention;

FIG. 4 is an enlarged view of the ring teeth of the present invention;

fig. 5 is an enlarged view of the helical teeth of the present invention.

Detailed Description

The utility model is further elucidated with reference to the drawings and the embodiments.

The high-sharpness anti-fracture intramedullary canal file as shown in fig. 1-5 comprises a file body 1, wherein ring teeth 11 and inclined teeth 12 are arranged on the file body 1, the ring teeth 11 are non-uniformly distributed, and the tooth pitch 100 of the ring teeth 11 is gradually increased from small to large from head to tail; a positive rake angle alpha 13 is arranged on the toothed belt of the ring gear 11; the root of the ring tooth 11 is provided with a chip groove 15, and the helical teeth 12 are in a segmented wavy design and are non-uniformly distributed from the head to the tail of the file body.

The head of the file body 1 is provided with a first annular tooth area A which is non-uniformly distributed, the number of the annular teeth 11 is 18, the tooth pitch 100 of the annular teeth 11 is increased to 2.5mm from 0.8mm, the tail of the file body 1 is provided with a second annular tooth area B which is non-uniformly distributed, the number of the annular teeth 11 is 11, and the tooth pitch 100 of the annular teeth 11 is increased to 3.0mm from 2.5 mm. The tail part of the file body 1 adopts the tooth pitch 100 of the ring teeth 11 which are distributed non-uniformly, the tooth pitch 100 is gradually increased from 0.8 to 2.5, and the tooth pitch 100 of the ring teeth 11 at the tail part is relatively designed to be small due to the small section size of the tail part of the file body, so that the stress can be relatively dispersed; along with the extension of the head direction, the section size gradually increases, the tooth pitch 100 of the ring teeth 11 also gradually increases, the tooth pitch 100 also gradually increases from 2.5 to 3.5, the cutting accommodating groove is enlarged, the cutting is smoothly arranged, the risk of fracture is reduced, and the success probability of the operation is greatly improved.

The file body 1 is divided into a small pitch helical tooth area (C) and a large pitch helical tooth area (D) from the head to the tail. The big face and the side face of the file body 1 adopt the wave-shaped inclined teeth 12 which are distributed non-uniformly, so that the file body bears the action of axial force and radial force simultaneously when in use, the fracture risk is reduced, and the sharpness is improved.

Furthermore, the tooth pitch 100 of the inclined teeth 12 at the tail part of the file body 1 is small, and the tooth pitch 100 at the head part of the file body 1 is large.

Moreover, the included angle beta 14 formed by the inclined teeth 12 positioned at the tail part of the file body 1 and the horizontal central axis is 55-60 degrees.

The positive rake angle α 13 is 1 ° to 7 ° in this embodiment.

In the embodiment, the file body 1 is provided with a clamping groove structure 2, and the clamping handle is fixedly locked with the file body 1 by being embedded into the clamping groove structure 2; and one side of the clamping groove structure 2 is provided with a positioning groove 3.

In the embodiment, the file body 1 is provided with a nitrided peptide coating.

The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, as various equivalents will occur to those skilled in the art upon reading the present invention and are intended to be within the scope of the utility model as defined in the claims appended hereto.

Claims

1. The utility model provides a high sharpness prevents breaking pulp cavity file which characterized in that: the novel file comprises a file body (1), wherein ring teeth (11) and inclined teeth (12) are arranged on the file body (1), the ring teeth (11) are non-uniformly distributed, and the tooth pitch (100) of the ring teeth (11) is gradually increased from small to large from the head to the tail; a positive rake angle alpha (13) is arranged on the toothed belt of the ring gear (11); the root of the ring tooth (11) is provided with a chip groove (15), and the inclined teeth (12) are in a segmented wavy design and are non-uniformly distributed from the head to the tail of the file body.

2. The high-sharpness fracture-preventing intramedullary canal file of claim 1, wherein: the head of the file body (1) is provided with a first annular tooth area (A) which is non-uniformly distributed, wherein the tooth pitch (100) of the annular teeth (11) is increased from 0.8mm to 2.5 mm; the tail part of the file body (1) is provided with a second annular tooth area (B) which is non-uniformly distributed, wherein the tooth pitch (100) of the annular teeth (11) is gradually increased to 3.0mm from 2.5 mm.

3. The high-sharpness fracture-preventing intramedullary canal file of claim 1, wherein: the file body (1) is divided into a small pitch helical tooth area (C) and a large pitch helical tooth area (D) from the head to the tail.

4. The high-sharpness fracture-preventing intramedullary canal file of claim 3, wherein: the inclined teeth (12) positioned at the tail part of the file body (1) form an included angle beta (14) of 55-60 degrees with the horizontal central axis.

5. The high-sharpness fracture-preventing intramedullary canal file of claim 1, wherein: the positive rake angle alpha (13) is 1-7 degrees.

6. The high-sharpness fracture-preventing intramedullary canal file of claim 1, wherein: the file body (1) is provided with a clamping groove structure (2), and the clamping handle is fixedly locked with the file body (1) by being embedded into the clamping groove structure (2); and one side of the clamping groove structure (2) is provided with a positioning groove (3).

7. The high-sharpness fracture-preventing intramedullary canal file of claim 1, wherein: the file body (1) is provided with a nitrided peptide coating.