CN216985043U

CN216985043U - Medical self-centering drill bit

Info

Publication number: CN216985043U
Application number: CN202123019386.5U
Authority: CN
Inventors: 高建华; 高立华; 刘海波; 顾扬; 尤屹东
Original assignee: Changzhou Huazhong Biotechnology Co ltd
Current assignee: Changzhou Huazhong Biotechnology Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-07-19
Anticipated expiration: 2031-12-02

Abstract

The utility model discloses a medical self-centering drill bit, which comprises a centering head, a cutting edge, a drill body and a drill tail, wherein the centering head is conical, the conical taper of the centering head is 40-50 degrees, the left side surface of the centering head is provided with a groove, the groove is an 1/4 conical groove, the edge of the groove is a cutting edge, a small amount of cutting can be completed while centering, the right side of the centering head is fixedly connected with a cylinder, the surface of the cutting edge is provided with a spiral edge, the left side surface of the cutting edge is provided with a first rear cutter face, the vertex angle of the first rear cutter face is 110-120 degrees, the right side surface of the cutting edge is provided with a second rear cutter face, the vertex angle of the second rear cutter face is 130-150 degrees, the surface of the drill body is provided with scales, the intervals of the scales are 1mm or 2mm, and are used for judging the drilling depth, the drill bit guarantees the sharpness and simultaneously guarantees the accuracy and stability of drilling, the tail quick-change interface enables the operation to be more efficient.

Description

Medical self-centering drill bit

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a medical self-centering drill bit.

Background

Common clinical diseases of athletes such as rotator cuff tear, shoulder joint, knee joint ligament damage etc. adopt the mode of implanting the tape line anchor to carry out the restoration treatment usually, and the tape line anchor is in the use preferred needs to beat out the bone tunnel on the bone, and the degree of depth and the diameter in bone tunnel also can influence the implantation effect of anchor simultaneously, can not use the center to bore when using ordinary medical drill bit to beat the bone tunnel and carry out the pre-perforation, has improved the risk that the bone tunnel was beaten partially in the intangible. Therefore, it is necessary to design a medical self-centering drill bit with strong practicability and capable of preventing the bone tunnel from deviating.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a medical self-centering drill bit to solve the problems in the background technology.

In order to solve the technical problems, the utility model provides the following technical scheme: medical self-centering drill bit, including centering head, cutting edge, the drill body and bore the tail, the centering head is conical, the conical taper of centering head is 40 to 50, the left side surface of centering head is provided with the recess, the recess is 1/4 circular cone groove, the edge of recess is the blade, the right side fixedly connected with cylinder of centering head, the surface of cutting edge is provided with the spiral sword, the left side surface of cutting edge is provided with first back knife face, the apex angle of first back knife face is 110 to 120, the right side surface of cutting edge is provided with second back knife face, the apex angle of second back knife face is 130 to 150, the drill body be provided with the scale on the surface, the interval of scale is 1mm or 2 mm.

According to the technical scheme, the first rear cutter face of the cutting edge is connected with the centering head through the cylinder, the diameter of the cylinder is slightly larger than the length of the chisel edge of the cutting edge, and the cutting edge is connected with the drill body through the second rear cutter face.

According to the technical scheme, the spiral blade is 3 blades, and the spiral angle of the spiral blade is 15-25 degrees.

According to the technical scheme, the drill body is a round rod, the diameter of the drill body is 6mm to 8mm, the drill body is slightly smaller than the diameter of the chisel edge of the second rear cutter face, and the length of the drill body is 80mm to 100 mm.

According to the technical scheme, the drill tail can be matched with the pistol drill to realize the driving of the pistol drill.

According to the technical scheme, the self-centering drill bit is made of a 17-4PH material, the HRC (Rockwell hardness) is more than or equal to 42 after heat treatment, and the self-centering drill bit is passivated.

Compared with the prior art, the utility model has the following beneficial effects: the drill bit ensures the sharpness and the accuracy and stability of drilling, the scale of the drill bit body intuitively reflects the drilling depth, and the tail quick-change interface ensures that the operation is more efficient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic representation of the construction of the self-centering drill bit of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a side cross-sectional structural schematic view of the self-centering drill bit of the present invention;

in the figure: 1. a centering head; 11. a groove; 12. a cylinder; 2. a cutting edge; 21. a helical blade; 22. a first relief surface; 23. a second relief surface; 3. a drill body; 31. and (4) calibration.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: the medical self-centering drill bit comprises a centering head 1, a cutting edge 2, a drill body 3 and a drill tail 4, wherein the centering head 1 is conical, the conical taper of the centering head 1 is 40-50 degrees, a groove 11 is formed in the left side surface of the centering head 1, the groove 11 is an 1/4 conical groove, the edge of the groove 11 is a cutting edge, a cylinder 12 is fixedly connected to the right side of the centering head 1, a spiral edge 21 is formed in the surface of the cutting edge 2, a first rear cutter face 22 is arranged on the left side surface of the cutting edge 2, the vertex angle of the first rear cutter face 22 is 110-120 degrees, a second rear cutter face 23 is arranged on the right side surface of the cutting edge 2, the vertex angle of the second rear cutter face 23 is 130-150 degrees, scales 31 are arranged on the surface of the drill body 3, and the intervals of the scales 31 are 1mm or 2 mm;

the first flank 22 of the cutting edge 2 is connected with the centering head 1 through a cylinder 12, the diameter of the cylinder 12 is slightly larger than the length of the chisel edge of the cutting edge 2, and the cutting edge 2 is connected with the drill body 3 through a second flank 23;

the spiral blade 21 is 3 blades, and the spiral angle of the spiral blade 21 is 15-25 degrees;

the drill body 3 is a round rod, the diameter of the drill body 3 is 6mm to 8mm, the diameter of the drill body 3 is slightly smaller than the diameter of the cross edge of the second rear cutter surface 23, and the length of the drill body 3 is 80mm to 100 mm;

the drill tail 4 can be matched with a pistol drill to realize the driving of the pistol drill;

the self-centering drill bit is made of a 17-4PH material, the HRC (Rockwell hardness) is more than or equal to 42 after heat treatment, and the self-centering drill bit is passivated to prevent rust after high-temperature steam sterilization.

The working principle is as follows: the diameter of the self-centering drill provided by the utility model is 8mm, in the actual operation process, the position needing to drill a bone tunnel is firstly found out under the assistance of an arthroscope, then the centering head of the self-centering drill is arranged on the surface of a bone, and finally the self-centering drill is connected with a pistol drill through a drill tail, the pistol drill is opened to drive the drill to drill, at the moment, the centering head of the self-centering drill realizes pre-drilling, and provides guidance for subsequent drilling, the centering head is provided with a conical groove, and the periphery of the groove is edged, so that the pre-drilling is smoother. Three sword cutting edges are equipped with two sets of back knife faces around, and the cylinder diameter of face contact slightly is lighter than the chisel edge diameter of first back knife face with first back knife face, and the cylinder diameter of face contact slightly is lighter than the chisel edge diameter of second back knife face with second back knife face, and the chip groove of cutting edge exposes completely, makes the chip removal more smooth.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Medical self-centering drill bit, including centering head (1), cutting edge (2), drill body (3) and brill tail (4), its characterized in that: the centering head (1) is conical, the conical taper of the centering head (1) is 40-50 degrees, a groove (11) is arranged on the left side surface of the centering head (1), the groove (11) is an 1/4 conical groove, the edge of the groove (11) is a cutting edge, the right side of the centering head (1) is fixedly connected with a cylinder (12), a spiral blade (21) is arranged on the surface of the cutting blade (2), a first rear cutter surface (22) is arranged on the left side surface of the cutting blade (2), the vertex angle of the first flank surface (22) is 110-120 degrees, the right side surface of the cutting edge (2) is provided with a second flank surface (23), the vertex angle of the second flank (23) is 130 degrees to 150 degrees, a scale (31) is arranged on the surface of the drill body (3), and the interval of the scale (31) is 1mm or 2 mm.

2. The medical self-centering drill bit of claim 1, wherein: the first flank face (22) of cutting edge (2) links to each other through cylinder (12) with centering head (1), the diameter of cylinder (12) slightly is greater than cutting edge (2) chisel edge length, cutting edge (2) link to each other through second flank face (23) with the drill body (3).

3. The medical self-centering drill bit according to claim 2, wherein: the spiral blade (21) is 3 blades, and the spiral angle of the spiral blade (21) is 15-25 degrees.

4. The medical self-centering drill bit according to claim 3, wherein: the drill body (3) is a round rod, the diameter of the drill body (3) is 6mm to 8mm, the drill body (3) is slightly smaller than the diameter of the cross edge of the second rear cutter face (23), and the length of the drill body (3) is 80mm to 100 mm.

5. The medical self-centering drill bit according to claim 4, wherein: the drill tail (4) can be matched with a pistol drill to realize the driving of the pistol drill.

6. The medical self-centering drill bit according to claim 5, wherein: the self-centering drill bit is made of a 17-4PH material, the HRC (Rockwell hardness) after heat treatment is more than or equal to 42, and the self-centering drill bit is passivated.