Screw for bone fracture plate

Abstract

The utility model relates to the related technical field of bone screws, and discloses a screw for a bone fracture plate, which comprises a main body component, the main body component comprises a screw tube, one end of the screw tube is a tail end, a fixing component is further arranged on the screw tube, and the fixing component comprises a main threaded rod rotationally connected in the screw tube. The main threaded rod is composed of two half threaded rods with the two ends fixedly connected, adjusting pieces are connected to the peripheral sides of the half threaded rods in a threaded mode, limiting blocks are further fixed to the adjusting pieces, and limiting grooves are further formed in the inner peripheral side wall of the screw pipe. By means of the arranged fixing assembly, when the device is used, a main threaded rod is rotated to enable a half threaded rod to rotate, so that the two adjusting pieces are driven to move relatively, a connecting plate is extruded to expand outwards, finally, a needle plate is pushed to move outwards, and a positioning needle is driven to penetrate through a through hole and pierce a skeleton to complete fixation. The problem that most of existing bone screws are fixed to a bone in a self-tapping mode, and bone trauma is large is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of bone screws, specifically a screw for bone plates. Background Technology

[0002] Bone screws, also known as bone plate screws, are threaded metal instruments used to fix bones or connect bones to implants (such as bone plates). They typically consist of three parts: a head, a body, and a tip. They are used to fix fractures. With the advancement of medical technology and a deeper understanding of fracture healing mechanisms, the design and materials of bone screws have been continuously improved. From the initial simple metal rod structure, they have gradually evolved into modern bone screws with fine threads, which have greatly improved their fixation effect and biocompatibility.

[0003] Most existing bone screws are fixed by self-tapping the external threads on the outer periphery of the screw into the bone. In this process, due to the embedding of the threads, the bone is greatly damaged during fixation. At the same time, the entire bone screw needs to be screwed into the bone little by little, which makes it inefficient. Especially when fixing a patient, multiple bone screws are needed to achieve fixation, which is even more time-consuming and laborious.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a screw for bone plates. By incorporating a fixed component, this invention solves the problem that most existing bone screws are fixed to the bone via self-tapping, which causes significant trauma to the bone.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A screw for bone plates includes a main assembly, which includes a screw tube with one end being a tail end. A fixing assembly is also provided on the screw tube. The fixing assembly includes a main threaded rod rotatably connected inside the screw tube. The main threaded rod is composed of two semi-threaded rods fixedly connected at two ends. An adjusting member is threadedly connected to the outer periphery of the semi-threaded rods. A limiting block is also fixed on the adjusting member. A limiting groove is also formed on the inner periphery of the screw tube. The limiting block is set in the limiting groove. A connecting plate is also hinged to one end of the adjusting member. A needle plate is hinged to the end of the connecting plate away from the limiting block. A plurality of positioning needles are fixed on the outer side of the needle plate. A through hole adapted to the position and number of positioning needles is also formed on the outer periphery of the screw tube.

[0008] Preferably, the head end of the screw tube is provided with a chamfer.

[0009] Preferably, the two semi-threaded rods are mirrored.

[0010] Preferably, each half of the threaded rod is a double-ended stud, and each half of the threaded rod is provided with two adjusting members. The two adjusting members on the same half of the threaded rod are mirror images of the two opposite threads of the half of the threaded rod.

[0011] Preferably, multiple needle plates are arranged in a circular array around the main thread rod.

[0012] Preferably, the main thread rod is fixed to a bottom end at one end of the screw tube.

[0013] Compared with the prior art, this utility model provides a screw for bone plates, which has the following characteristics:

[0014] Beneficial effects:

[0015] 1. This utility model, through its fixed component, allows the main threaded rod to rotate when in use, causing the semi-threaded rod to rotate, thereby driving the two adjusting components to move relative to each other. This, in turn, compresses the connecting plate to expand outward, ultimately pushing the needle plate to move outward, causing the positioning needle to pass through the through hole, pierce the bone, and complete the fixation. This solves the problem that most existing bone screws are fixed to the bone by self-tapping, which causes significant trauma to the bone.

[0016] 2. This utility model, through its fixed component, allows the positioning pin to protrude and fix the broken bone with only a small rotation of the main thread rod during use. This solves the problem of traditional bone screw fixation, where the entire screw needs to be screwed into the bone, requiring many rotations due to the external threads on the outside of the screw, which is time-consuming and laborious. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the fixing component of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixing component of this utility model with part of the needle plate removed;

[0020] Figure 4 This is a front view of the fixing component of this utility model with part of the needle plate removed.

[0021] In the picture:

[0022] 1. Main body component; 11. Screw tube; 12. Tail end; 13. Through hole;

[0023] 2. Fixing component; 21. Main threaded rod; 22. Semi-threaded rod; 23. Adjusting component; 24. Limiting block; 241. Limiting groove; 25. Connecting plate; 26. Needle plate; 27. Positioning pin; 28. Bottom end. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a screw for bone plates.

[0026] Please see Figure 1 - Figure 4 A screw for bone plates includes a main assembly 1, which includes a screw tube 11. One end of the screw tube 11 is a tail end 12. A fixing assembly 2 is also provided on the screw tube 11. The fixing assembly 2 includes a main threaded rod 21 rotatably connected inside the screw tube 11. The main threaded rod 21 is composed of two semi-threaded rods 22 whose ends are fixedly connected. An adjusting member 23 is threadedly connected to the outer periphery of the semi-threaded rods 22. A limiting block 24 is also fixed on the adjusting member 23. A limiting groove 241 is also opened on the inner periphery of the screw tube 11. The limiting block 24 is disposed in the limiting groove 241. A connecting plate 25 is also hinged to one end of the adjusting member 23. A needle plate 26 is hinged to the end of the connecting plate 25 away from the limiting block 24. A plurality of positioning needles 27 are fixed on the outer side of the needle plate 26. A through hole 13 is also opened on the outer periphery of the screw tube 11, which is adapted to the position and number of positioning needles 27.

[0027] When using this product, similar to traditional bone screws, the broken bone is fixed by using a steel plate and bone screws together. First, bolt holes are drilled in the bone using a drilling tool, then a steel plate is placed, and finally, the bone screw is passed through the bolt holes in the steel plate and nailed to the broken bone for positioning, thus assisting the normal growth of the broken bone. Unlike traditional screws, this product does not have external threads on the screws. Instead, it is equipped with several positioning pins 27. When in use, rotating the main thread rod 21 causes the semi-thread rod 22 to rotate. When the semi-thread rod 22 rotates, it drives the two adjusting parts 23 to move relative to each other, thereby squeezing the connecting plate 25 to expand outward. The two connecting plates 25 are fixed on the same pin plate 26, thereby pushing the pin plate 26 to move outward, and finally driving the positioning pins 27 to pass through the through hole 13, pierce the bone, and complete the fixation. This greatly reduces the trauma to the bone caused by the self-tapping of the threads, while improving the efficiency of fixation.

[0028] Furthermore, the screw tube 11 has a chamfered end, which is almost hemispherical, mainly to prevent scratching the bone when it is inserted.

[0029] Furthermore, the two semi-threaded rods 22 are mirror-arranged so that when the main threaded rod 21 rotates, the two semi-threaded rods 22 can rotate mirror-arranged to control the fixing parts on the two semi-threaded rods 22 and fix the skeleton.

[0030] Furthermore, each half of the threaded rod 22 is a double-ended stud, and each half of the threaded rod 22 is provided with two adjusting members 23. The two adjusting members 23 on the same half of the threaded rod 22 are mirror images of the two opposite threads of the half of the threaded rod 22. When the half of the threaded rod 22 rotates, it will drive the two adjusting members 23 to move relative to each other, thereby squeezing the connecting plate 25 to expand outward. The two connecting plates 25 are fixed on the same needle plate 26, thereby pushing the needle plate 26 to move outward, and finally driving the positioning needle 27 to pierce the bone and complete the fixation.

[0031] Furthermore, multiple needle plates 26 are arranged in a ring array around the main thread rod 21, and the multiple needle plates 26 form a ring as a whole, which facilitates a more uniform fixation and connection between the entire screw and the bone.

[0032] Furthermore, the main thread rod 21 is fixed to a bottom end 28 at one end of the tail end 12 of the screw tube 11. The bottom end 28 is mainly provided with screw holes for fitting a special screwdriver to adjust the bone screw and fix the broken bone of the injured person.

[0033] Working principle: When using this product, similar to traditional bone screws, the broken bone is fixed by the combination of a steel plate and a bone screw. First, bolt holes are drilled in the bone using a drilling tool, then a steel plate is placed, and finally, the bone screw is passed through the bolt holes in the steel plate and nailed to the broken bone for positioning, thus assisting the normal growth of the broken bone. Unlike traditional screws, this product does not have external threads on the screws. Instead, it is equipped with several positioning pins 27. When in use, rotating the main thread rod 21 causes the semi-thread rod 22 to rotate. When the semi-thread rod 22 rotates, it drives the two adjusting parts 23 to move relative to each other, thereby squeezing the connecting plate 25 to expand outward. The two connecting plates 25 are fixed on the same pin plate 26, thereby pushing the pin plate 26 to move outward, and finally driving the positioning pins 27 to pass through the through hole 13, pierce the bone, and complete the fixation. This greatly reduces the trauma to the bone caused by the self-tapping of the threads, while improving the efficiency of fixation.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bone plate screw characterized by: The system includes a main component (1), which includes a screw tube (11) with one end being a tail end (12). A fixing component (2) is also provided on the screw tube (11). The fixing component (2) includes a main threaded rod (21) rotatably connected within the screw tube (11). The main threaded rod (21) is composed of two half-threaded rods (22) whose ends are fixedly connected. An adjusting element (23) is threadedly connected to the outer periphery of each half-threaded rod (22). An adjusting element (23) is also fixed on the adjusting element (23). The limiting block (24) has a limiting groove (241) on the inner circumferential side wall of the screw tube (11). The limiting block (24) is located in the limiting groove (241). One end of the adjusting member (23) is also hinged to a connecting plate (25). The end of the connecting plate (25) away from the limiting block (24) is hinged to a needle plate (26). Several positioning needles (27) are fixed on the outer side of the needle plate (26). The outer circumferential side of the screw tube (11) is also provided with through holes (13) that match the position and number of the positioning needles (27).

2. A bone screw for use with a bone plate according to claim 1, characterized in that: The screw tube (11) has a chamfer at its head.

3. A screw for use with a bone plate according to claim 1, wherein: The two semi-threaded rods (22) are mirrored.

4. A screw for use with a bone plate according to claim 3, characterized in that: Each of the aforementioned semi-threaded rods (22) is a double-ended stud, and each of the aforementioned semi-threaded rods (22) is provided with two adjusting members (23). The two adjusting members (23) on the same semi-threaded rod (22) are mirror images of the two opposite threads of the semi-threaded rod (22).

5. A screw for use with a bone plate according to claim 1, wherein: The needle plate (26) is arranged in a ring array with the main thread rod (21) as the center.

6. A screw for use with a bone plate according to claim 1, wherein: The main thread rod (21) has a bottom end (28) fixed at one end of the tail end (12) of the screw tube (11).

Images