CN111150472A - Composite penetrating self-drilling and self-tapping spicule structure - Google Patents

Abstract

The invention relates to a composite penetrating self-drilling and self-tapping spicule structure which comprises a metal needle body, a tail cap, a left-handed polylactic acid needle head and a left-handed polylactic acid sheath, wherein the front end face and the rear end face of the metal needle body are positioning grooves, at least two guide grooves are uniformly distributed on the outer surface of the metal needle body, the left-handed polylactic acid needle head and the tail cap are respectively connected with the front end face and the rear end face of the metal needle body through the positioning grooves, the left-handed polylactic acid needle head is in a cone structure, at least three drilling cutting edges are uniformly distributed on the outer surface of the left-handed polylactic acid needle head, the left-handed polylactic acid sheath is coated outside the metal. On one hand, the invention is convenient to realize the installation and the positioning of the spicules under the drive of low rotating speed and low torque, greatly reduces the heat productivity and the bone fragment production quantity during the positioning of the spicules, and on the other hand, the invention can effectively promote the healing of the skeletal wound surface of a patient, reduce the diameter of the spicules, realize the reduction of the friction force borne by the spicules when the spicules are pulled out, and improve the convenience of the pulling-out operation and the wound healing efficiency.

Description

Composite penetrating self-drilling and self-tapping spicule structure

Technical Field

The invention relates to a bone needle structure, in particular to a composite penetration type self-drilling and self-tapping bone needle structure.

Background

At present, a spicule is one of important instruments for the quality of bone diseases such as fracture and the like, the using amount is large, in order to overcome the defects that when a traditional spicule is positioned, operations such as tapping and the like need to be firstly carried out on a bone by means of special equipment, the efficiency of spicule operation is improved, the efficiency and the stability of the spicule positioning to the bone are improved, a spicule structure with self-drilling and self-tapping capabilities is currently developed, for example, a patent with the application number of '200920266676. X', the spicule of the structure is usually formed by adding a drilling cutting edge and a tapping cutting edge to the surface of the spicule, and the aim of automatically connecting and positioning the spicule with the bone under external force driving is realized by the drilling cutting edge and the tapping cutting edge, but in use, the spicule structure of the type at present is made of metal materials such as titanium, titanium alloy, stainless steel and the like, although the structural strength is large, the requirements of positioning and pulling operation of the bone to the, and easily cause secondary damage to the wound of a patient because of the drilling cutting edge and the tapping cutting edge, on the other hand because of the pure metal structure, when positioning the skeleton, can not provide effective nourishing for the recovery healing of the damaged part of the skeleton, thereby causing the recovery efficiency of the wound to be low, and influencing the efficiency and the quality of the recovery of the state of an illness of fracture, therefore aiming at the current situation, a brand-new bone needle structure is urgently needed to be developed to meet the requirement of practical use.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a composite penetration type self-drilling and self-tapping spicule structure, the invention has simple structure, flexible and convenient use and good universality, is convenient to realize the installation and positioning of the spicules under the driving of low rotating speed and low torque on the bones of patients, greatly reduces the heat productivity and the bone fragment production quantity during the positioning of the spicules, thereby avoiding the deviation of the positioning position of the skeleton caused by overlarge torque, avoiding the secondary damage to the patient caused by needle clamping, needle breaking and the like of the bone needle in the skeleton caused by overlarge heat productivity and bone fragment production, effectively promoting the healing of the wound surface of the skeleton of the patient, reducing the diameter of the bone needle, effectively reducing the pressure between the bone needle and the skeleton and muscle tissues, reducing the wound area after the bone needle is pulled out, therefore, the friction force borne by the spicules is reduced when the spicules are pulled out, and the convenience of pulling out operation and the wound healing efficiency are improved.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a composite penetrating self-drilling and self-tapping spicule structure comprises a metal needle body, a tail cap, a left-handed polylactic acid needle head and a left-handed polylactic acid sheath, wherein the metal needle body is of a cylindrical structure, the front end surface and the rear end surface of the metal needle body are positioning grooves which are coaxially distributed with the metal needle body, the depth of each positioning groove is not less than 5 millimeters but not more than 1/2 of the effective length of the metal needle body, the diameter of each positioning groove is at least 1 millimeter smaller than the diameter of the metal needle body, at least two guide grooves are uniformly distributed on the outer surface of the metal needle body, the guide grooves are uniformly distributed around the axis of the metal needle body, an included angle of 0-60 degrees is formed between each guide groove and the axis of the metal needle body, the left-handed polylactic acid needle head and the tail cap are respectively connected with the front end surface and the rear end surface of the metal needle body through the positioning grooves and are coaxially distributed with the metal needle, at least three drilling blades are uniformly distributed on the outer surface of the needle body, the drilling blades are uniformly distributed around the axial line of the left-handed polylactic acid needle head, the front end faces of the drilling blades are uniformly distributed along the axial direction of the levorotatory polylactic acid needle, the front end face of one drilling blade positioned at the foremost end is flush with the front end face of the levorotatory polylactic acid needle, the distance between the front end of the drilling blade positioned at the rearmost end and the front end face of the levorotatory polylactic acid needle is 1/3-1/2 of the effective length of the levorotatory polylactic acid needle, the levorotatory polylactic acid sheath is a hollow tubular structure coaxially distributed with the metal needle body, the levorotatory polylactic acid sheath is coated outside the metal needle body and is mutually connected with the metal needle body through a guide groove, the outer surface of the levorotatory polylactic acid sheath is provided with at least two tapping blades, and the tapping blades are uniformly distributed around the axial line of the levorotatory polylactic acid sheath, and at least one chip groove is arranged between two adjacent tapping blades, and a diversion trench is arranged on the outer surface of the tail cap corresponding to the chip groove.

Furthermore, the front end face and the rear end face of the levorotatory polylactic acid sheath are respectively abutted against the rear end face of the levorotatory polylactic acid needle head and the front end face of the tail cap.

Furthermore, an elastic sealing cover is arranged on the contact surface of the tail cap and the metal needle body.

Furthermore, the elastic sealing cover is of a groove-shaped structure with an axial section of Jiong character and H, and the elastic sealing cover is wrapped on the outer sides of the metal needle body and the tail cap.

Furthermore, the cross sections of the drilling blade and the tapping blade are any one of isosceles triangle, isosceles body and right-angle body structures, and the height of the drilling blade and the height of the tapping blade are not more than 5 mm.

Furthermore, the levorotatory polylactic acid needle and the drilling and cutting edge are of an integrated structure, and the levorotatory polylactic acid sheath and the tapping edge are of an integrated structure.

Furthermore, the depth of the chip removal groove is 1/3-2/3 of the wall thickness of the side wall of the levorotatory polylactic acid sheath, and the cross section of the chip removal groove is in any one of a rectangular, V-shaped and U-shaped structure.

The bone needle fixing device is simple in structure, flexible and convenient to use and good in universality, on one hand, the bone needle is convenient to install and position under the drive of low rotating speed and low torque on the bone of a patient, and the heat productivity and the bone fragment generation amount during the bone needle positioning are greatly reduced, so that the deviation of the bone positioning position caused by overlarge torque is avoided, the secondary injury of the bone needle on the patient caused by needle clamping, needle breaking and the like in the bone due to overlarge heat productivity and bone fragment generation amount is avoided, on the other hand, the bone wound surface healing of the patient can be effectively promoted, the diameter of the bone needle is reduced, the pressure between the bone needle and bone and muscle tissues is effectively reduced, the wound area after the bone needle is pulled out is reduced, the friction force borne by the bone needle is reduced when the bone needle is pulled out, and the convenience of pulling operation and the wound healing efficiency are improved.

Drawings

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of the present invention;

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

The composite penetrating self-drilling and self-tapping bone needle structure as shown in figure 1 comprises ametal needle body 1, atail cap 2, a left-handed polylacticacid needle head 3 and a left-handedpolylactic acid sheath 4, wherein themetal needle body 1 is of a cylindrical structure, the front end surface and the rear end surface of the metal needle body are both provided withpositioning grooves 5, thepositioning grooves 5 are coaxially distributed with themetal needle body 1, the depth of eachpositioning groove 5 is not less than 5 mm but not more than 1/2 of the effective length of themetal needle body 1, the diameter of eachpositioning groove 5 is at least 1 mm smaller than that of themetal needle body 1, at least two guide grooves 6 are uniformly distributed on the outer surface of themetal needle body 1, the guide grooves 6 are uniformly distributed around the axis of themetal needle body 1, an included angle of 0-60 degrees is formed between the guide grooves 6 and the axis of themetal needle body 1, the left-handed polylacticacid needle head 3 and thetail cap 2, The maximum diameter of the levorotatory polylacticacid needle head 3 is 1.3 to 5 times of the diameter of themetal needle body 1, wherein the levorotatory polylacticacid needle head 3 is in a cone structure, at least threedrilling blades 7 are uniformly distributed on the outer surface of the levorotatory polylactic acid needle head, thedrilling blades 7 are uniformly distributed around the axis of the levorotatory polylacticacid needle head 3, the front end surfaces of thedrilling blades 7 are uniformly distributed along the axis direction of the levorotatory polylacticacid needle head 3, the front end surface of onedrilling blade 7 positioned at the forefront end is flush with the front end surface of the levorotatory polylacticacid needle head 3, the distance between the front end of thedrilling blade 7 positioned at the rearmost end and the front end surface of the levorotatory polylacticacid needle head 3 is 1/3 to 1/2 of the effective length of the levorotatory polylacticacid needle head 3, the levorotatorypolylactic acid sheath 4 is in a hollow tubular structure coaxially distributed with themetal needle body 1, the levorotatorypolylactic acid sheath 4 is coated outside themetal needle body 1 and is mutually connected with the metal needle, tappingblades 8 are uniformly distributed around the axis of the levorotatorypolylactic acid sheath 4, at least onechip groove 9 is formed between every twoadjacent tapping blades 8, and adiversion trench 10 is formed in the outer surface of thetail cap 2 corresponding to thechip groove 9.

In this embodiment, the front end surface and the rear end surface of thesheath 4 of the l-polylactic acid respectively abut against the rear end surface of theneedle 3 of the l-polylactic acid and the front end surface of thetail cap 2.

In this embodiment, anelastic sealing cover 11 is provided on the contact surface of thetail cap 2 and themetal needle body 1.

In this embodiment, theelastic sealing cover 11 has a groove-shaped structure with an axial cross section of Jiong character and H, and theelastic sealing cover 11 covers the outside of themetal needle body 1 and thetail cap 2.

In this embodiment, the cross sections of thedrilling blade 7 and the tappingblade 8 are any one of isosceles triangle, isosceles trapezoid and right-angle trapezoid, and the heights of thedrilling blade 7 and the tappingblade 8 are not greater than 5 mm.

In this embodiment, the levorotatorypolylactic acid needle 3 and thedrilling blade 7 are of an integral structure, and the levorotatorypolylactic acid sheath 4 and the tappingblade 8 are of an integral structure.

In the embodiment, the depth of thechip groove 9 is 1/3-2/3 of the wall thickness of the side wall of the levorotatorypolylactic acid sheath 4, and the cross section is any one of a rectangular, V-shaped and U-shaped structure.

In the specific implementation of the invention, firstly, the metal needle body, the tail cap, the levorotatory polylactic acid needle head and the levorotatory polylactic acid sheath are assembled for standby.

When the bone needle is used for positioning bones, the bone needle is connected with external driving equipment through a tail cap for the first time, then the bone needle is driven by the external equipment to slowly rotate at a low speed, in the rotating process, on one hand, drilling operation is carried out through a left-handed polylactic acid needle head and a drilling blade on the outer surface of the left-handed polylactic acid needle head, on the other hand, in the drilling process, the bones are tapped through a tapping blade on the outer surface of a left-handed polylactic acid sheath, and the connection and positioning between the bone needle and the bones are realized through tapping, so that the installation and positioning of the bone needle are completed.

In the process of positioning bones by using the spicules, the levorotatory polylactic acid needle head, the levorotatory polylactic acid sheath, the drilling blade and the tapping blade on the outer surfaces of the levorotatory polylactic acid needle head and the levorotatory polylactic acid sheath are degraded into lactic acid and the like in a human body, on one hand, the diameter of the spicules is reduced, the gaps among the spicules, the bones, muscles and other tissues are increased, the friction force when the spicules are pulled out is reduced, the efficiency of pulling out the spicules is improved, secondary damage to wounds of patients is avoided, on the other hand, a certain nourishing effect can be achieved on the wounds of the patients, the wound healing efficiency is improved, and therefore the purposes of improving the bone recovery efficiency and the recovery quality are.

The bone needle fixing device is simple in structure, flexible and convenient to use and good in universality, on one hand, the bone needle is convenient to install and position under the drive of low rotating speed and low torque on the bone of a patient, and the heat productivity and the bone fragment generation amount during the bone needle positioning are greatly reduced, so that the deviation of the bone positioning position caused by overlarge torque is avoided, the secondary injury of the bone needle on the patient caused by needle clamping, needle breaking and the like in the bone due to overlarge heat productivity and bone fragment generation amount is avoided, on the other hand, the bone wound surface healing of the patient can be effectively promoted, the diameter of the bone needle is reduced, the pressure between the bone needle and bone and muscle tissues is effectively reduced, the wound area after the bone needle is pulled out is reduced, the friction force borne by the bone needle is reduced when the bone needle is pulled out, and the convenience of pulling operation and the wound healing efficiency are improved.

It will be appreciated by persons skilled in the art that the present invention is not limited by the embodiments described above. The foregoing embodiments and description have been presented only to illustrate the principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention. Such variations and modifications are intended to be within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a compound penetration type is from boring self tapping type spicule structure which characterized in that: the composite penetrating self-drilling and self-tapping spicule structure comprises a metal needle body, a tail cap, a left-handed polylactic acid needle head and a left-handed polylactic acid sheath, wherein the metal needle body is of a cylindrical structure, the front end surface and the rear end surface of the metal needle body are positioning grooves, the positioning grooves and the metal needle body are coaxially distributed, the depth of each positioning groove is not less than 5 millimeters but not more than 1/2 of the effective length of the metal needle body, the diameter of each positioning groove is at least 1 millimeter smaller than that of the metal needle body, at least two guide grooves are uniformly distributed on the outer surface of the metal needle body, the guide grooves are uniformly distributed around the axis of the metal needle body, an included angle of 0-60 degrees is formed between each guide groove and the axis of the metal needle body, the left-handed polylactic acid needle head and the tail cap are respectively connected with the front end surface and the rear end surface of the metal needle body through the positioning grooves and are coaxially distributed with the metal needle body, wherein the levorotatory polylactic acid needle is in a cone structure, at least three drilling blades are uniformly distributed on the outer surface of the levorotatory polylactic acid needle, the drilling blades are uniformly distributed around the axis of the levorotatory polylactic acid needle, the front end faces of the drilling blades are uniformly distributed along the axis direction of the levorotatory polylactic acid needle, one drilling blade front end face positioned at the forefront end is flush with the front end face of the levorotatory polylactic acid needle, the distance between the front end of the drilling blade positioned at the tail end and the front end face of the levorotatory polylactic acid needle is 1/3-1/2 of the effective length of the levorotatory polylactic acid needle, the levorotatory polylactic acid sheath is in a hollow tubular structure coaxially distributed with the metal needle body, the levorotatory polylactic acid sheath is coated outside the metal needle body and is mutually connected with the metal needle body through a guide groove, at least two tapping blades are arranged on the outer surface of the levorotatory polylactic acid sheath, and the tapping blades are uniformly distributed around the axis of the levorotatory, and at least one chip groove is arranged between two adjacent tapping blades, and a diversion trench is arranged on the outer surface of the tail cap corresponding to the chip groove.

2. The composite penetration self-drilling and self-tapping spicule structure of claim 1, wherein: the front end face and the rear end face of the levorotatory polylactic acid sheath are respectively abutted against the rear end face of the levorotatory polylactic acid needle head and the front end face of the tail cap.

3. The composite penetration self-drilling and self-tapping spicule structure of claim 1, wherein: and an elastic sealing cover is arranged on the contact surface of the tail cap and the metal needle body.

4. A composite penetration self-drilling and self-tapping bone pin structure as in claim 3, wherein: the elastic sealing cover is of a groove-shaped structure with an axial section of Jiong character and H, and the elastic sealing cover is coated on the outer sides of the metal needle body and the tail cap.

5. The composite penetration self-drilling and self-tapping spicule structure of claim 1, wherein: the cross sections of the drilling blade and the tapping blade are any one of isosceles triangle, isosceles body and right-angle body structures, and the heights of the drilling blade and the tapping blade are not more than 5 mm.

6. The composite penetration self-drilling and self-tapping spicule structure of claim 1, wherein: the levorotatory polylactic acid needle and the drilling and cutting edge are of an integral structure, and the levorotatory polylactic acid sheath and the tapping edge are of an integral structure.

7. The composite penetration self-drilling and self-tapping spicule structure of claim 1, wherein: the chip removal groove is 1/3-2/3 of the wall thickness of the side wall of the levorotatory polylactic acid sheath, and the cross section of the chip removal groove is in any one of a rectangular, V-shaped and U-shaped structure.

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