Nail taking device for orthopedics department

Abstract

The invention belongs to the technical field of medical instruments, and discloses an orthopedic nail taking device which comprises a shell with a cavity in the center, anti-skid lines are arranged on the side wall of the outer side of the shell, two symmetrically-arranged clamping rods are rotationally connected to the bottom of the shell, and a first threaded column with a cavity in the center is in threaded connection with an inner cavity of the shell. The bottom of the first threaded column is rotationally connected with a supporting block through a bearing, an inner cavity of the first threaded column is in threaded connection with a second threaded column, the bottom of the second threaded column is fixedly connected with a tool bit used for rotating an orthopedic screw, the free end of the tool bit is linear, and the tool bit penetrates through the supporting block and is in sliding connection with the supporting block. The supporting block is fixedly connected with two symmetrically-arranged connecting rods, and the other sides of the connecting rods are rotationally connected with the clamping rods. The problems that when an existing screw taking device is used for taking a screw, an operator is difficult to accurately control the force, the bone and surrounding tissues of a patient are easily injured due to excessive force, and the device is separated from the screw due to too small force are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an orthopedic nail removal device. Background Art

[0002] The orthopedic nail removal device is a medical device used to remove the fixation screws from the patient's body after the fracture heals. Its main function is to accurately and safely remove the screws implanted in the bone, avoid unnecessary damage to the surrounding tissues, and help the patient recover. When removing the nails, the traditional nail removal device requires the operator to accurately control the force so that the device fits tightly with the screws to successfully complete the nail removal operation.

[0003] However, many operators find it difficult to accurately control this force. If too much force is used, it will cause unnecessary damage to the patient's bones and surrounding tissues, increase the patient's pain, and may even cause secondary fractures or damage key structures such as peripheral nerves and blood vessels. If too little force is used, the tight connection between the nail removal device and the screw cannot be maintained, resulting in separation of the device and the screw. Summary of the invention

[0004] The present invention aims to provide an orthopedic nail removal device to solve the problem that when removing nails with existing nail removal devices, it is difficult for operators to accurately control the force. Using too much force may easily damage the patient's bones and surrounding tissues, while using too little force may cause the device to separate from the screw.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] An orthopedic nail removal device comprises a shell with a cavity in the center, two symmetrically arranged clamping rods are rotatably connected to the bottom of the shell, a first threaded column with a cavity in the center is threadedly connected to the inner cavity of the shell, a support block is rotatably connected to the bottom of the first threaded column, a second threaded column is threadedly connected to the inner cavity of the first threaded column, a cutter head for rotating orthopedic screws is fixedly connected to the bottom of the second threaded column, the cutter head passes through the support block and is slidably connected to the support block, the support block is fixedly connected to two symmetrically arranged connecting rods, and the other side of the connecting rod is rotatably connected to the clamping rod.

[0007] Furthermore, the clamping rod is "L-shaped".

[0008] Furthermore, the free end of the clamping rod is wrapped with a rubber layer for increasing friction.

[0009] Furthermore, an anti-slip pattern is provided on the outer side wall of the shell.

[0010] Furthermore, the first threaded column and the support block are rotatably connected via a bearing.

[0011] Furthermore, the free end of the blade head is in a straight line shape.

[0012] The principle and beneficial effects of the technical solution are:

[0013] 1. The present invention provides an orthopedic nail removal device for orthopedics, which uses an "L-shaped" clamping rod to clamp the lower side of the screw head of the orthopedic screw, and uses the free end of the cutter head to fit the upper side of the screw head of the orthopedic screw, so that the device can wrap and fix the orthopedic screw, thereby achieving a close fit between the device and the orthopedic screw. In the process of rotating the device and the orthopedic screw, there is no need to squeeze the screw of the orthopedic screw to achieve the fit between the device and the orthopedic screw, which effectively solves the problem that it is difficult for operators to accurately control the force when removing nails with existing nail removal devices. Excessive force may easily damage the patient's bones and surrounding tissues, while insufficient force may cause the device to separate from the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an orthopedic nail removal device used in orthopedics of the present invention;

[0015] Figure 2 It is a cross-sectional view of an orthopedic nail removal device used in orthopedics of the present invention;

[0016] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0017] The names of the corresponding marks in the drawings are: housing 1, clamping rod 2, first threaded column 3, supporting block 4, second threaded column 5, cutter head 6, connecting rod 7. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0019] like Figure 1-Figure 3 As shown, an orthopedic nail removal device is used in orthopedics, including a shell 1 with a cavity in the center, two symmetrically arranged clamping rods 2 are rotatably connected to the bottom of the shell 1, a first threaded column 3 with a cavity in the center is threadedly connected to the inner cavity of the shell 1, a support block 4 is rotatably connected to the bottom of the first threaded column 3, a second threaded column 5 is threadedly connected to the inner cavity of the first threaded column 3, a cutter head 6 for rotating orthopedic screws is fixedly connected to the bottom of the second threaded column 5, the cutter head 6 passes through the support block 4 and is slidably connected to the support block 4, the support block 4 is fixedly connected to two symmetrically arranged connecting rods 7, and the other side of the connecting rod 7 is rotatably connected to the clamping rod 2.

[0020] When in use, first, hold the shell 1 and rotate the first threaded column 3 at the same time. The first threaded column 3 rotates in the shell 1, so that the first threaded column 3 and the shell 1 are relatively displaced. The first threaded column 3 drives the support block 4 to move together during the movement. The support block 4 drives the clamping rod 2 to move together through the connecting rod 7 during the movement, so that the clamping rod 2 rotates around the shell 1, thereby realizing the opening and closing of the two clamping rods 2, and completing the limiting of the clamping rod 2 on the lower side of the screw head of the orthopedic screw; secondly, rotate the second threaded column 5 to make the second threaded column 5 rotate in the inner cavity of the first threaded column 3, and make the second threaded column 5 rotate in the inner cavity of the first threaded column 3, and make the second threaded column 5 rotate in the inner cavity of the first threaded column 3. The second threaded column 5 and the first threaded column 3 are relatively displaced, and the cutter head 6 connected to the second threaded column 5 is moved, so that the free end of the cutter head 6 is fitted with the screw head driving groove on the upper side of the screw head of the orthopedic screw, and then the screw head of the orthopedic screw is placed between the free end of the clamping rod 2 and the free end of the cutter head 6, effectively preventing the device from separating from the orthopedic screw. At the same time, there is no need to apply a force to the orthopedic screw through the cutter head 6 to achieve the fitting of the free end of the cutter head 6 and the orthopedic screw, thereby achieving the orthopedic screw being driven to rotate by the cutter head 6 without applying a longitudinal force to the orthopedic screw.

[0021] In this embodiment, the clamping rod 2 is L-shaped. The clamping rod 2 is designed to be L-shaped, so that the free end of the clamping rod 2 is placed under the head of the orthopedic screw, thereby limiting the position of the free end of the clamping rod 2 on the head of the orthopedic screw.

[0022] In this embodiment, the free end of the clamping rod 2 is wrapped with a rubber layer for increasing friction, thereby enhancing the clamping stability and preventing the screw from slipping by using high friction, thus ensuring a smooth operation; at the same time, the clamping rod 2 contacts the orthopedic screw through the rubber layer, effectively avoiding damage to the orthopedic screw and further reducing the possibility of the orthopedic screw breaking, and in addition, facilitating improved surgical accuracy.

[0023] In this embodiment, anti-skid patterns are provided on the outer side wall of the housing 1. By increasing the surface roughness and increasing the friction between the hand, the operator's holding stability during operation is improved. When removing orthopedic nails, the operator needs to accurately control the strength and direction of the nail removal device. The anti-skid patterns can prevent the device from slipping due to sweating of the hands or uneven force, effectively ensuring that the operator can rotate the device and ensure a smooth and continuous operation process.

[0024] In this embodiment, the first threaded column 3 is rotatably connected to the support block 4 via a bearing. Rolling is used instead of sliding friction to reduce the friction coefficient, so that the rotation operation between the first threaded column 3 and the support block 4 is smoother, and it is convenient for the operator to move the support block 4 to adjust the opening and closing of the two clamping rods 2.

[0025] In this embodiment, the free end of the blade head 6 is in a straight line shape, which is suitable for various types of screws. During surgery, there is no need to frequently change tools, and different screws can be quickly aligned, greatly improving the operation efficiency.

[0026] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An orthopedic nail removal device, characterized in that: The invention comprises a shell (1) with a cavity at the center, the bottom of the shell (1) is rotatably connected to two symmetrically arranged clamping rods (2), the inner cavity of the shell (1) is threadedly connected to a first threaded column (3) with a cavity at the center, the bottom of the first threaded column (3) is rotatably connected to a support block (4), the inner cavity of the first threaded column (3) is threadedly connected to a second threaded column (5), the bottom of the second threaded column (5) is fixedly connected to a cutter head (6) for rotating an orthopedic screw, the cutter head (6) passes through the support block (4) and is slidably connected to the support block (4), the support block (4) is fixedly connected to two symmetrically arranged connecting rods (7), and the other side of the connecting rod (7) is rotatably connected to the clamping rod (2).

2. The orthopedic nail removal device according to claim 1, characterized in that: The clamping rod (2) is L-shaped.

3. The orthopedic nail removal device according to claim 1, characterized in that: The free end of the clamping rod (2) is wrapped with a rubber layer for increasing friction.

4. The orthopedic nail removal device according to claim 1, characterized in that: The outer side wall of the housing (1) is provided with anti-slip patterns.

5. The orthopedic nail removal device according to claim 1, characterized in that: The first threaded column (3) and the support block (4) are rotatably connected via a bearing.

6. The orthopedic nail removal device according to claim 1, characterized in that: The free end of the cutter head (6) is in a straight line shape.

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