CN215306571U

CN215306571U - Left-handed orthopedic fixing screw

Info

Publication number: CN215306571U
Application number: CN202120987027.XU
Authority: CN
Inventors: 王美发
Original assignee: Jiangsu Tianxi Electric Power Equipment Co ltd
Current assignee: Jiangsu Tianxi Electric Power Equipment Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-12-28
Anticipated expiration: 2031-05-10

Abstract

The utility model relates to the technical field of orthopedic medical product structures, and discloses a left-handed orthopedic fixing screw which comprises a screw head, wherein a screw rod is fixed in the middle of the lower surface of the screw head, left-handed threads are formed in the outer surface of the screw rod, positioning holes are formed in the left side and the right side of the screw head, a compression ring is sleeved on the outer surface of the screw rod, anti-skid threads are formed in the lower surface of the compression ring, positioning rods are fixed on the left side and the right side of the upper surface of the compression ring, the top ends of the positioning rods penetrate through the positioning holes and are in threaded connection with nuts, and a first spring is sleeved on the outer surface of each positioning rod and positioned between the screw head and the compression ring. This levogyration orthopedics set screw, through the restoring force of first spring and second spring can drive the clamp ring downstream, the antiskid line and the position in close contact with of fracture of clamp ring lower surface this moment to prevent that the screw rod from appearing not hard up, avoid fracture end displacement phenomenon to appear, improved treatment.

Description

Left-handed orthopedic fixing screw

Technical Field

The utility model relates to the technical field of orthopedic medical product structures, in particular to a left-handed orthopedic fixing screw.

Background

Fracture is a common disease in orthopedics, a fracture part is fixed by fixing screws in clinical treatment, the thread directions of common fixing screws are both right-handed, and if two right-handed fixing screws are used at two ends of the fracture part, the fracture end is often displaced, and the treatment effect is affected.

To the above disadvantage, the chinese authorized utility model discloses a number: CN202191354U discloses a left-handed orthopaedic fixing screw, the thread direction of which is left-handed and which is used in combination with a right-handed fixing screw, because the fixing screws at both ends of the fracture part are turned in opposite directions, no displacement occurs between the two bones, the stability of the fracture part is good, and the treatment effect is improved;

however, due to the structural design of the prior art, the fixing screw is easy to loosen under the condition of long use, so that the fracture end is easy to displace, and the treatment effect is affected.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art in the background art, the utility model aims to provide a left-handed orthopaedic fixing screw to solve the problems that some left-handed orthopaedic fixing screws in the market are easy to loosen under the condition of long use, so that the fracture end is easy to displace and the treatment effect is influenced.

(II) technical scheme

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

the utility model provides a levogyration orthopedics set screw, includes the screwhead, the lower surface middle part of screwhead is fixed with the screw rod, levogyration screw thread has been seted up to the surface of screw rod, the locating hole has all been seted up to the left and right sides of screwhead, the surface cover of screw rod is equipped with the clamp ring, anti-skidding line has been seted up to the lower surface of clamp ring, the left and right sides of clamp ring upper surface all is fixed with the locating lever, locating hole and threaded connection have the nut are run through on the top of locating lever, the surface of locating lever just is located and is equipped with first spring between the upper surface of the lower surface of screwhead and clamp ring.

Preferably, the upper surface of the screw head is provided with a wrench groove, and the wrench groove is positioned in the middle of the upper surface of the screw head.

Preferably, guide holes are formed in the front side and the rear side of the screw head, guide rods are fixed to the front side and the rear side of the upper surface of the compression ring, the top end of each guide rod penetrates through the corresponding guide hole and is located outside the screw head, and a second spring is sleeved on the outer surface of each guide rod and is located between the lower surface of the screw head and the upper surface of the compression ring.

Preferably, a gap is reserved between the inner wall of the compression ring and the outer surface of the screw rod, and the compression ring and the screw rod are coaxially arranged.

Furthermore, the diameter of the positioning hole is larger than that of the positioning rod, and an external thread is formed on the outer surface of the top end of the positioning rod.

Further, one end of the first spring is in contact with the upper surface of the compression ring, and the other end of the first spring is in contact with the lower surface of the screw head.

(III) advantageous effects

Compared with the prior art, the utility model has the beneficial effects that: this levogyration orthopedics set screw:

(1) this levogyration orthopedics set screw, through the restoring force of first spring and second spring can drive the clamp ring downstream, the antiskid line and the position in close contact with of fracture of clamp ring lower surface this moment to prevent that the screw rod from appearing not hard up, avoid fracture end displacement phenomenon to appear, improved treatment.

(2) This levogyration orthopedics set screw can be convenient for use instrument through the spanner groove and screwed set screw, and the cooperation through guide bar and guiding hole can make the atress of clamp ring more balanced, makes clamp ring and fracture position contact more stable.

Drawings

FIG. 1 is a schematic perspective view of a left-handed orthopedic fixation screw according to the present invention;

FIG. 2 is a schematic structural view of a left-handed orthopedic fixation screw in front view in section;

FIG. 3 is a schematic structural view of the screw head of the left-handed orthopaedic fixation screw of the present invention;

fig. 4 is a structural schematic view of a compression ring of the left-handed orthopaedic set screw of the present invention.

In the figure: 1. a screw head; 2. a screw shaft; 3. positioning holes; 4. a compression ring; 5. anti-skid lines; 6. positioning a rod; 7. a nut; 8. a first spring; 9. a wrench groove; 10. a guide hole; 11. a guide bar; 12. a second spring; 13. and (4) external threads.

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. 1-4, the present invention provides a left-handed orthopaedic fixation screw, which comprises a screw head 1, a screw rod 2, a positioning hole 3, a compression ring 4, anti-slip threads 5, a positioning rod 6, a nut 7, a first spring 8, a wrench groove 9, a guide hole 10, a guide rod 11, a second spring 12 and external threads 13, wherein the screw rod 2 is fixed in the middle of the lower surface of the screw head 1, left-handed threads are formed on the outer surface of the screw rod 2, the screw rod 2 is screwed into a fracture part through the left-handed threads on the screw rod 2, the positioning hole 3 is formed on each of the left and right sides of the screw head 1, the compression ring 4 is sleeved on the outer surface of the screw rod 2, the anti-slip threads 5 are formed on the lower surface of the compression ring 4, the anti-slip threads 5 on the lower surface of the compression ring 4 are in tight contact with the fracture part, thereby preventing the screw rod 2 from loosening, the positioning rod 6 is fixed on each of the left and right side of the upper surface of the compression ring 4, the top end of the positioning rod 6 penetrates through the positioning hole 3 and is in threaded connection with the nut 7, the positioning rod 6 is in threaded connection with the screw head 1 through the screw cap 7, the compression ring 4 can be conveniently detached, the first spring 8 is sleeved on the outer surface of the positioning rod 6 and between the lower surface of the screw head 1 and the upper surface of the compression ring 4, the compression ring 4 can be driven to move downwards through the restoring force of the first spring 8, and the contact stability of the compression ring 4 and a fracture part is improved;

as a preferred technical scheme of the utility model: a wrench groove 9 is formed in the upper surface of the screw head 1, the wrench groove 9 is located in the middle of the upper surface of the screw head 1, and the fixing screw can be screwed conveniently by using a tool through the wrench groove 9;

as a preferred technical scheme of the utility model: the front side and the rear side of the screw head 1 are both provided with guide holes 10, the front side and the rear side of the upper surface of the compression ring 4 are both fixed with guide rods 11, the top end of each guide rod 11 penetrates through the guide hole 10 and is positioned outside the screw head 1, a second spring 12 is sleeved on the outer surface of each guide rod 11 and between the lower surface of the screw head 1 and the upper surface of the compression ring 4, and the compression ring 4 can be stressed more uniformly by matching the guide rods 11 with the guide holes 10, so that the compression ring 4 is contacted with a fracture part more stably;

as a preferred technical scheme of the utility model: a gap is reserved between the inner wall of the compression ring 4 and the outer surface of the screw rod 2, the compression ring 4 and the screw rod 2 are coaxially arranged, and the compression ring 4 is prevented from rubbing the screw rod 2 in the moving process by the clearance reserved between the inner wall of the compression ring 4 and the outer surface of the screw rod 2;

as a preferred technical scheme of the utility model: the diameter of the positioning hole 3 is larger than that of the positioning rod 6, an external thread 13 is formed in the outer surface of the top end of the positioning rod 6, the positioning rod 6 is in threaded connection with the screw head 1 through a nut 7, and the compression ring 4 can be conveniently detached;

as a preferred technical scheme of the utility model: one end of the first spring 8 is in contact with the upper surface of the compression ring 4, the other end of the first spring 8 is in contact with the lower surface of the screw head 1, the compression ring 4 can be driven to move downwards through the restoring force of the first spring 8, and the contact stability of the compression ring 4 and the fracture part is improved.

The working principle of the embodiment is as follows: when the left-handed orthopaedic fixation screw is used, as shown in fig. 1-4, the whole device is composed of a screw head 1, a screw rod 2, a positioning hole 3, a compression ring 4, anti-slip threads 5, a positioning rod 6, a screw cap 7, a first spring 8, a wrench groove 9, a guide hole 10, a guide rod 11, a second spring 12 and external threads 13, as shown in fig. 1-4, firstly, the compression ring 4 is sleeved on the outer surface of the screw rod 2, the anti-slip threads 5 on the compression ring 4 face downwards, then, the first spring 8 and the second spring 12 are respectively sleeved on the positioning rod 6 and the guide rod 11, the top end of the guide rod 11 penetrates through the guide hole 10, the top end of the positioning rod 6 penetrates through the positioning hole 3 to be in threaded connection with the screw cap 7, then, the device is screwed into a fracture part through left-handed threads on the screw rod 2, then, the screw cap 7 is loosened, and the compression ring 4 can be driven to move downwards through the restoring forces of the first spring 8 and the second spring 12, at this time, the anti-slip lines 5 on the lower surface of the compression ring 4 are in close contact with the fracture part, so that the screw rod 2 is prevented from loosening, the phenomenon of displacement of the fracture end is avoided, the treatment effect is improved, the whole device works, and the content which is not described in detail in the specification belongs to the prior art which is known by the professional in the field.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, may be fixedly connected or detachably connected; or indirectly through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations; it will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a levogyration orthopedics set screw, includes screwhead (1), its characterized in that, the lower surface middle part of screwhead (1) is fixed with screw rod (2), levogyration screw thread has been seted up to the surface of screw rod (2), locating hole (3) have all been seted up to the left and right sides of screwhead (1), the surface cover of screw rod (2) is equipped with clamp ring (4), anti-skidding line (5) have been seted up to the lower surface of clamp ring (4), the left and right sides of clamp ring (4) upper surface all is fixed with locating lever (6), locating hole (3) and threaded connection have nut (7) are run through on the top of locating lever (6), the surface of locating lever (6) just is located and is equipped with first spring (8) between the upper surface of lower surface of screwhead (1) and clamp ring (4).

2. The left-handed orthopaedic fixation screw according to claim 1, wherein the screw head (1) has a wrench slot (9) formed in the upper surface thereof, and the wrench slot (9) is located in the middle of the upper surface of the screw head (1).

3. The levogyration orthopedics fixing screw of claim 1, characterized in that, the front and back both sides of screwhead (1) are equipped with guiding hole (10), the front and back both sides of clamp ring (4) upper surface are all fixed with guide bar (11), the top of guide bar (11) runs through guiding hole (10) and is located the outside of screwhead (1), the surface of guide bar (11) and be located the cover between the lower surface of screwhead (1) and the upper surface of clamp ring (4) are equipped with second spring (12).

4. Left-handed orthopaedic fixation screw according to claim 1, wherein a gap is left between the inner wall of the compression ring (4) and the outer surface of the screw shank (2), the compression ring (4) being arranged coaxially with the screw shank (2).

5. The left-handed orthopaedic fixation screw according to claim 1, wherein the diameter of the positioning hole (3) is greater than the diameter of the positioning rod (6), and the outer surface of the top end of the positioning rod (6) is provided with an external thread (13).

6. Left-handed orthopaedic fixation screw according to claim 1, wherein one end of said first spring (8) is in contact with the upper surface of the compression ring (4) and the other end of said first spring (8) is in contact with the lower surface of the screw head (1).