CN213430496U - Bone needle - Google Patents

Abstract

The utility model relates to a spicule, including pole portion and point portion, the point portion locates the one end of pole portion, the point portion includes 3 at least cutting edges, the extreme point coincidence of the one end of cutting edge is in a common point, the common point is the point extreme point of point portion; and a cutting surface is arranged between the adjacent cutting edges and is a concave surface. The utility model has small self-drilling resistance, easy chip removal and more convenient and labor-saving operation for doctors; the heat dissipation is fast, the problem of bone heat loss is avoided, and the recovery speed of the patient is fast after the orthopedic operation.

Description

Bone needle

Technical Field

The utility model relates to a spicule belongs to medical instrument technical field.

Background

In an orthopedic operation, a bone pin is often used to fix a broken bone of a patient by mounting the bone pin on the bone of the patient, and thus, the bone pin requires a self-drilling function. The existing bone needle, such as a kirschner wire or a schner wire commonly used in orthopaedics, structurally comprises a bone needle rod part and a tip part, wherein the rod part can be smooth or provided with threads; the tip part is generally in a conical blade shape and is provided with 2-4 cutting surfaces, a common point is arranged among the cutting surfaces, the common point is the end point of the tip part of the bone needle and is also the acting point of the bone needle when the bone needle drills automatically, and the adjacent cutting surfaces form cutting edges, but the structure causes the resistance of the bone needle when the bone needle drills automatically to be larger, and the operation difficulty of a doctor is large; the bone needle implants from the in-process of boring, can produce the heat, because the coefficient of heat conductivity of bone is little, the heat of production is hardly propagated, the most advanced structure and the bone area of contact of this kind of bone needle are big, can lead to the operation in-process from boring the temperature height, operation position heat dissipation difficulty, cause the heat damage scheduling problem of bone easily, consequently, need a neotype bone needle structure, reduce from boring the resistance at the self-boring in-process, the radiating effect is good, avoid the heat damage of bone.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to current spicule from boring the problem that the resistance is big, the heat dissipation is difficult, provide a little, the heat dissipation of resistance, the low spicule of drilling temperature from boring.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a spicule comprising a shaft and a tip, the tip being provided at one end of the shaft, the tip comprising at least 3 cutting edges, the extremities of one end of the cutting edges coinciding with a common point, the common point being the extremity of the tip; and a cutting surface is arranged between the adjacent cutting edges and is a concave surface.

The utility model has the advantages that:

the utility model improves the cutting surface of the spicule, the cutting surface of the spicule is a concave surface, so that the cutting angle of the cutting edge is reduced, the cutting edge is sharper, the tip part is sharper during operation, the self-drilling resistance is small, and the operation of doctors is labor-saving;

in the process of drilling the bone, because the cutting surface of the bone needle is a concave surface, a channel which can enable the needle point to be in contact with air for heat dissipation is formed on the cutting surface, meanwhile, the contact area of the tip part of the bone needle and the bone is reduced, the drilling temperature is obviously reduced, and the problem of bone damage caused by heating in the self-drilling process of the bone needle is solved;

in general, the utility model has small self-drilling resistance, easy chip removal and more convenient and labor-saving operation for doctors in the process of orthopedic surgery; the heat dissipation is fast, the problem of bone heat loss is avoided, and the recovery speed of the patient is fast after the orthopedic operation.

On the basis of the technical scheme, the utility model discloses a reach the convenience of use and the stability of equipment, can also make following improvement to foretell technical scheme:

further, the cutting surface comprises a first cutting surface and a second cutting surface, the first cutting surface and the second cutting surface are symmetrically arranged, and the first cutting surface and the second cutting surface have a common edge.

The beneficial effect of adopting the further technical scheme is that the first cutting surface and the second cutting surface are arranged to form a channel which is in contact with air, and the first cutting surface and the second cutting surface are symmetrically arranged to ensure that the channel is arranged in the middle of the cutting surface, so that the heat dissipation is faster.

Further, the first cutting surface and the second cutting surface are planes; the cutting surface is a V-shaped concave surface, and the common edge is the bottom edge of the V-shaped concave surface.

The beneficial effect of adopting above-mentioned further technical scheme is that, the cutting face is the cutting angle that can make the cutting edge littleer for the V-arrangement concave surface, and the cutting edge is sharper, and the self-drilling resistance of spicule is littleer.

Further, one end of the bottom side of the V-shaped concave surface coincides with the common point.

The technical scheme has the advantages that one end of the bottom edge of the V-shaped concave surface is coincided with the common point, the needle point is positioned on the bottom edge of the V-shaped concave surface, the contact area with air is larger, and the heat dissipation of the needle point is more convenient.

Further, the included angle between the first cutting surface and the rod part and the included angle between the second cutting surface and the rod part are 15-25 degrees.

The angle between the first cutting surface and the rod part and the angle between the second cutting surface and the rod part are designed to be 15-25 degrees, so that the length of the tip part is moderate, the overlong tip part of the bone needle is avoided, and the condition that the needle tip of the bone needle penetrates through the skin from the other side of the bone in the process of the orthopedic surgery to cause the injury to a patient is avoided; the needle inserting effect and the operation effect of the spicule are not affected due to the fact that the tip of the spicule is not too short.

Further, the side edge of the cutting face opposite to the common point is an arc-shaped edge.

The beneficial effect of adopting the further technical scheme is that the connecting part of the tip part and the rod part is in smooth transition, so that the chip removal of the needle tip in the self-drilling process is more smooth.

Furthermore, the number of the cutting surfaces is 3, the application range of the 3 cutting surfaces is wide, the processing is simple, the cutting angle of the cutting edge is small, and the spicules are sharper.

Drawings

FIG. 1 is a schematic view of the overall structure of a spicule according to an embodiment;

FIG. 2 is a front view of an embodiment of a bone pin;

FIG. 3 is a schematic view of another angle configuration of an embodiment of a bone pin;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is a side view of an embodiment of a spicule;

FIG. 6 is a schematic view of various angles of the spicule according to an embodiment;

fig. 7 is a sectional view taken along line B-B of fig. 6.

The reference numbers are recorded as follows: 1-cutting face, 1.1-first cutting face, 1.2-second cutting face, 1.3-common edge, 2-common point, 3-cutting edge, 4-side edge, 5-rod.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 7, a bone needle comprises a rod part 5 and a tip part, wherein the tip part is arranged at one end of the rod part 5, and the tip part and the rod part 5 are integrally formed; the tip part comprises 3 cutting edges 3, the end points of one ends of the 3 cutting edges are overlapped with a common point 2, and the common point 2 is the tip point of the tip part, namely the needle point of the spicule; a cutting surface 1 is arranged between the adjacent cutting edges 3, and the cutting surface 1 is a concave surface.

The cutting surface 1 comprises a first cutting surface 1.1 and a second cutting surface 1.2, the first cutting surface 1.1 and the second cutting surface 1.2 are symmetrically arranged, and the first cutting surface 1.1 and the second cutting surface 1.2 have a common edge 1.3. The first cutting surface 1.1 and the second cutting surface 1.2 are planes; the first cutting surface 1.1 and the second cutting surface 1.2 form the cutting surface 1 into a V-shaped concave surface (see fig. 7). The common edge 1.3 is the bottom edge of the V-shaped concave surface. One end of the bottom edge of the V-shaped concave surface coincides with the common point 2 and the other end extends to the rod portion 5. The first 1.1 and second 1.2 cutting surfaces are angled at 15-25 deg. to the shank 5 (see fig. 6). The side edge 4 of the cutting face 1 opposite to the common point 2 is an arc-shaped edge.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (7)

1. A spicule comprising a shaft and a tip, the tip being provided at one end of the shaft, wherein the tip comprises at least 3 cutting edges, the extremities of one end of the cutting edges coinciding with a common point, the common point being the extremity of the tip; and a cutting surface is arranged between the adjacent cutting edges and is a concave surface.

2. The bone pin of claim 1, wherein the cutting surface comprises a first cutting surface and a second cutting surface, the first cutting surface and the second cutting surface being symmetrically disposed, the first cutting surface and the second cutting surface having a common edge.

3. The bone pin of claim 2, wherein the first and second cutting surfaces are planar; the cutting surface is a V-shaped concave surface, and the common edge is the bottom edge of the V-shaped concave surface.

4. A bone needle according to claim 3, wherein one end of the base of the V-shaped concavity is coincident with the common point.

5. The bone pin of claim 2, wherein the first and second cutting surfaces are angled at an angle of 15 ° to 25 ° with respect to the shaft.

6. The bone pin of claim 1, wherein a side of the cutting face opposite the common point is arcuate.

7. A bone needle according to any of claims 1 to 6, characterized in that there are 3 cutting faces.

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