A surgical nail extractor

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, and concretely relates to a surgical screw extractor for orthopedics, which comprises a screw and a screw extractor body, two symmetrically arranged connecting arms are fixedly sleeved on the screw extractor body, a sliding groove penetrating through the connecting arm is formed in the top of the connecting arm, and a sliding rod is slidably connected in the sliding groove, the screw is made of titanium alloy, the screw tail cap has double-layer threads, the inner layer is a plum blossom-shaped female thread, and is suitable for a plum blossom-shaped screwdriver, the outer layer is a hexagonal male thread, and is suitable for a hexagonal hollow sleeve screwdriver, the double-layer thread design of the screw provides "double insurance", when the plum blossom thread of the inner layer slips and the screw cannot be taken out, the hexagonal hollow sleeve screwdriver can be used to take out the screw by engaging with the outer layer hexagonal thread.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically an orthopedic surgical nail removal device. Background Technology

[0002] An orthopedic screw remover, also known as an "orthopedic pin puller," is a medical device used to remove metal nails, screws, plates, or other fixation devices implanted during orthopedic surgery. Screw removers are primarily used after fracture repair, joint replacement, or other orthopedic surgeries when it is necessary to remove fixation devices that have been implanted within or outside the bone.

[0003] When removing implanted screws, a screw remover is needed. The remover connects to the screw, and rotating it pulls the screw out of the patient's body. However, the screw remover only engages with the screw by fitting or locking the end of the remover onto the end of the screw. When the screw is removed, only one end is in contact with the remover, making it easy for the screw to detach and difficult to retrieve. While magnetic screw removers exist, they require the magnetic end of the screw to be accurately fitted into the groove on the magnetic end of the remover before rotation can remove it. Since most screws are small, aligning the screw and remover for magnetic attraction requires time and effort, resulting in low efficiency in practice.

[0004] Therefore, this utility model provides a screw removal device for orthopedic surgery. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The orthopedic surgical screw remover of this utility model includes a screw and a screw remover body; two symmetrically arranged connecting arms are fixedly sleeved on the screw remover body, and a through-slide groove is opened on the top of the connecting arm, and a slide rod is slidably connected in the slide groove; a slide column is slidably connected in the slide rod, and an arc-shaped clamp is fixedly installed at one end of the two slide columns that are close to each other, and a fixed plate is fixedly installed at the end of the slide column that is away from the clamp, and a spring is fixedly installed on the side of the fixed plate that is close to the slide column, and the side of the spring that is away from the fixed plate is fixedly connected to the slide rod.

[0007] Furthermore, a connecting plate is fixedly installed on the top of each of the two slide rods, and several anti-slip pads are fixedly installed on the top of the connecting plate.

[0008] Furthermore, a triangular fixing frame is fixedly installed on the top of the clamping plate, and a number of guide posts are provided on one side of the fixing frame.

[0009] Furthermore, two symmetrically arranged fixing cones are fixedly installed at the bottom of the nail ejector body, and the fixing cones and the fixing frame are on the same straight line.

[0010] Furthermore, a gasket is fixedly installed on the side of the clamp away from the sliding column, and the gasket is made of anti-slip material.

[0011] Furthermore, a fixing plate is fixedly installed in the groove of the connecting arm, and a side pad is fixedly installed on the side wall of the slide rod. Both the fixing plate and the side pad are made of anti-slip material and abut against each other.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model discloses an orthopedic surgical screw remover. The screw is made of titanium alloy and features a double-threaded cap. The inner thread is a Torx-shaped female thread, compatible with Torx-shaped screwdrivers. The outer thread is a hexagonal male thread, compatible with hexagonal hollow socket screwdrivers. This double-threaded design provides "double insurance." If the inner Torx thread strips and the screw cannot be removed, a hexagonal hollow socket screwdriver can be used to remove the screw by engaging with the outer hexagonal thread. When the screw needs to be removed, the screw remover body is placed on the screw. After the screw and the screw remover body are connected, the sliding column, clamp, and washer move towards the screw under the action of the spring and the fixed plate. This causes the clamp and washer to clamp the screw, and the washer increases friction and accommodates screws of different diameters. When the sliding rod slides, it contacts the fixed plate in the sliding groove along with the side washer. The fixed plate and side washer increase friction, preventing the sliding rod from sliding down when stationary. This design prevents the screw from falling out when one end detaches from the patient's body. Furthermore, removing the screw simply requires pulling the sliding rod, which moves the clamp and other components upwards to their original position, thus releasing the screw and allowing for easy removal. This effectively prevents the screw from falling out and also facilitates its retrieval.

[0014] 2. The orthopedic surgical screw remover of this utility model, through its designed fixing cone, guides the screw remover body when it approaches the screw, allowing it to quickly position and fit over the top of the screw. When the screw remover body needs to be moved upwards to reset, the triangular fixing frame causes several guide posts to contact the inclined surface of the fixing cone, thereby squeezing and forcing the fixing frame to slide the clamp away from the screw. This facilitates the sliding rod and clamp to reset, no longer securing the screw. This design facilitates both screw removal and the reset of the sliding rod and clamp. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1This is a three-dimensional structural diagram of the screw in this utility model;

[0017] Figure 2 This is a structural schematic diagram of the nail ejector body in this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting arm in this utility model;

[0019] Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A;

[0020] Figure 5 This is a partial structural diagram of the slide bar in this utility model.

[0021] In the diagram: 1. Screw; 2. Screw ejector body; 3. Connecting arm; 4. Slide groove; 5. Slide rod; 6. Slide column; 7. Clamping plate; 8. Fixing plate; 9. Spring; 10. Connecting plate; 11. Anti-slip pad; 12. Fixing frame; 13. Guide column; 14. Fixing cone; 15. Washer; 16. Side pad; 17. Fixing plate. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 5 As shown in the embodiment of this utility model, an orthopedic surgical screw remover includes a screw 1 and a screw remover body 2. Two symmetrically arranged connecting arms 3 are fixedly sleeved on the screw remover body 2. The top of the connecting arm 3 has a through-slide groove 4, and a slide rod 5 is slidably connected in the slide groove 4. A slide column 6 is slidably connected in the slide rod 5. An arc-shaped clamping plate 7 is fixedly installed at one end of the two slide columns 6 that is close to each other. A fixing plate 8 is fixedly installed at the end of the slide column 6 that is away from the clamping plate 7. A spring 9 is fixedly installed on the side of the fixing plate 8 that is close to the slide column 6. The side of the spring 9 that is away from the fixing plate 8 is fixedly connected to the slide rod 5.

[0024] Specifically, a connecting plate 10 is fixedly installed on the top of each of the two sliding rods 5, and several anti-slip pads 11 are fixedly installed on the top of the connecting plate 10. A gasket 15, made of anti-slip material, is fixedly installed on the side of the clamping plate 7 away from the sliding column 6. A fixing plate 17 is fixedly installed in the sliding groove 4 of the connecting arm 3, and a side pad 16 is fixedly installed on the side wall of the sliding rod 5. Both the fixing plate 17 and the side pad 16 are made of anti-slip material and abut against each other.

[0025] During operation, screw 1 is made of titanium alloy and features a double-threaded cap. The inner thread is a Torx-shaped female thread, compatible with Torx-shaped screwdrivers. The outer thread is a hexagonal male thread, compatible with hexagonal hollow socket screwdrivers. This double-threaded design provides "double protection." If the inner Torx thread strips and screw 1 cannot be removed, a hexagonal hollow socket screwdriver can be used to remove screw 1 by engaging with the outer hexagonal thread.

[0026] When screw 1 needs to be removed, the screw remover body 2 (a general term for the screw removal device) is placed on screw 1. After screw 1 and screw remover body 2 are connected, the connecting plate 10 is pushed, causing the connecting plate 10, along with the slide rod 5 and clamping plate 7 on the connecting arm 3, to slide towards screw 1. When clamping plate 7 slides to screw 1, the sliding column 6, clamping plate 7, and washer 15 move towards screw 1 under the action of spring 9 and fixed plate 8, thereby clamping screw 1 with clamping plate 7 and washer 15. The washer 15 increases friction and adapts to screws 1 of different diameters. When the slide rod 5 slides, it brings the side washer 16 into contact with the fixed piece 17 in the slide groove 4. The fixed piece 17 and side washer 16 increase friction, preventing the slide rod 5 from sliding down when it is not sliding. When sliding is needed, force is applied to the slide rod 5. When the screw remover body 2 begins to rotate, causing the screw 1 to leave the patient's body, the two clamps 7 will hold the screw 1 in place, preventing it from falling out when one end of the screw 1 is removed from the patient's body. Furthermore, to remove the screw 1, simply pull the slide bar 5, causing it to move upwards and reset along with the clamps 7 and other components, thus releasing the screw 1 and allowing for easy removal. This effectively prevents the screw 1 from falling out and also facilitates its retrieval.

[0027] A triangular fixing frame 12 is fixedly installed on the top of the clamping plate 7, and several guide posts 13 are provided on one side of the fixing frame 12. Two symmetrically arranged fixing cones 14 are fixedly installed on the bottom of the nail ejector body 2, and the fixing cones 14 and the fixing frame 12 are on the same straight line.

[0028] During operation, the designed fixed cone 14 guides the screw remover body 2 as it approaches the screw 1, allowing it to quickly position and fit onto the top of the screw 1. When the screw remover body 2 needs to move upwards to reset, the triangular fixed frame 12 causes several guide posts 13 to contact the inclined surface of the fixed cone 14, thereby squeezing and forcing the fixed frame 12 to slide the clamping plate 7 away from the screw 1. This facilitates the reset of the slide rod 5 with the clamping plate 7, removing the screw 1 from its original position. This design facilitates both easy removal of the screw 1 and easy reset of the slide rod 5 and clamping plate 7.

[0029] Working principle: When screw 1 needs to be removed, the screw remover body 2 is placed on screw 1. After the screw 1 and screw remover body 2 are connected, the connecting plate 10 is pushed, causing the connecting plate 10, along with the sliding rod 5 and clamping plate 7 on the connecting arm 3, to slide towards screw 1. When the clamping plate 7 slides to screw 1, the sliding column 6, clamping plate 7, and washer 15 move towards screw 1 under the action of spring 9 and fixed plate 8, thus clamping screw 1 with clamping plate 7 and washer 15. The washer 15 increases friction and adapts to screws 1 of different diameters. When the sliding rod 5 slides, it brings the side washer 16 into contact with the fixed piece 17 in the slide groove 4. The fixed piece 17 and side washer 16 increase friction, preventing the sliding rod 5 from sliding down when it is not sliding. When sliding is needed, force is applied to the sliding rod 5. When the screw ejector body 2 starts to rotate and drives the screw 1 out of the patient's body, the two clamps 7 will clamp the screw 1 so that the screw 1 will not fall out when one end of the screw 1 leaves the patient's body.

[0030] With the design of the fixed cone 14, when the screw remover body 2 approaches the screw 1, the fixed cone 14 serves as a guide, allowing the screw remover body 2 to be quickly positioned and fitted onto the top of the screw 1. When the screw remover body 2 needs to be moved upwards to reset, the triangular fixed frame 12 will cause several guide posts 13 to contact the inclined surface of the fixed cone 14, thereby squeezing and forcing the fixed frame 12 to move the clamping plate 7 away from the screw 1, thus facilitating the slide rod 5 to reset with the clamping plate 7, and no longer fixing the screw 1.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A screw remover for orthopedic surgery, comprising a screw (1) and a screw remover body (2); characterized in that: The nail ejector body (2) is fixedly fitted with two symmetrically arranged connecting arms (3). The top of the connecting arm (3) is provided with a through groove (4), and a sliding rod (5) is slidably connected in the groove (4). The sliding rod (5) is slidably connected to a sliding column (6). An arc-shaped clamp (7) is fixedly installed at one end of the two sliding columns (6) that are close to each other. A fixed plate (8) is fixedly installed at the end of the sliding column (6) that is away from the clamp (7). A spring (9) is fixedly installed on the side of the fixed plate (8) that is close to the sliding column (6). The side of the spring (9) that is away from the fixed plate (8) is fixedly connected to the sliding rod (5). A connecting plate (10) is fixedly installed on the top of each of the two slide rods (5), and a number of anti-slip pads (11) are fixedly installed on the top of the connecting plate (10). A pad (15) is fixedly installed on the side of the clamp (7) away from the sliding column (6), and the pad (15) is made of anti-slip material; A fixing plate (17) is fixedly installed in the groove (4) of the connecting arm (3), and a side pad (16) is fixedly installed on the side wall of the slide rod (5). Both the fixing plate (17) and the side pad (16) are made of anti-slip material and abut against each other.

2. The orthopedic surgical screw removal device according to claim 1, characterized in that: A triangular fixing frame (12) is fixedly installed on the top of the clamp (7), and a number of guide posts (13) are provided on one side of the fixing frame (12).

3. The orthopedic surgical screw removal device according to claim 1, characterized in that: The bottom of the nail ejector body (2) is fixedly installed with two symmetrically arranged fixing cones (14), and the fixing cones (14) and the fixing frame (12) are on the same straight line.

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