CN118236139A - Clinical orthopedics is with getting nail device - Google Patents

Abstract

The invention provides a clinical orthopedic nail taking device, and belongs to the technical field of clinic. The rotary knob assembly comprises a support frame, a knob assembly sleeved outside the support frame, a fixing assembly arranged inside the knob assembly and a transmission assembly hinged to the bottom of the knob assembly. According to the invention, the rotary knob assembly is rotated to move down to push the movable cylinder, the movable cylinder moves down to push the gas in the support frame to enter the fixed ring, so that the internal gas pressure is gradually increased, the fixed plate and the clamping block are respectively pushed outwards, the outer end of the clamping block is contacted with the inner wall of the groove at the top of the bone screw, the rotary knob assembly continuously rotates to push the movable cylinder downwards, the bottom of the limiting rod is contacted with the fixed plate, the limiting plate and the outer part of the clamping block, the second spring is compressed, the clamping block is limited by the limiting rod, the loosening phenomenon of the clamping block in the rotating process is avoided, the stability between the clamping block and the bone screw is improved by pushing the clamping block by the gas pressure in the fixed ring, and the slipping phenomenon in the rotating process is avoided.

Description

A clinical orthopedic nail removal device

Technical Field

The invention relates to the field of clinical technology, and in particular to a nail removal device for clinical orthopedics.

Background technique

Bone screws are non-active surgical metal implants for bone joining, consisting of cortical bone screws (full thread and half thread) and cancellous bone screws (full thread and half thread). In clinical practice, screws are usually used in combination with steel plates to internally fix the fracture site. In current fracture surgery, using bone screws and steel plates to fix the fracture site is a commonly used surgical method in existing surgeries. Bone screws need to be removed after being implanted in the human body for a period of time. Since bone screws are connected to human bones after being in the body for a long time, it is very difficult for doctors to remove them. At present, medical staff usually use a screwdriver adapted to the bone screw to rotate it in the opposite direction during the nail removal process. However, since the bone screws are in the patient's body for a long time, corrosion or adhesion is prone to occur. During the rotation process, the screwdriver and the bone screw slip, which makes it difficult to remove the bone screw, thereby increasing the difficulty of removing the bone screw. Therefore, the present application provides a clinical orthopedic nail removal device to meet the needs.

Summary of the invention

The technical problem to be solved by the present invention is to provide a clinical orthopedic nail removal device to solve the problem that the existing bone screws are prone to corrosion or adhesion when they are in the patient's body for a long time, and the screwdriver and the bone screws slip during rotation, making it difficult to remove the bone screws.

In order to solve the above technical problems, the present invention provides the following technical solutions:

A clinical orthopedic nail removal device comprises a support frame, a knob assembly sleeved on the outside of the support frame, a fixing assembly installed inside the knob assembly, a transmission assembly hinged at the bottom of the knob assembly, a stabilizing assembly fixedly mounted on the bottom of the knob assembly and sliding on the outside of the support frame, and a docking assembly arranged at the bottom of the support frame; the outside of the support frame is provided with a counterclockwise thread; the docking assembly comprises a fixing ring installed at the bottom of the support frame, the inside of the fixing ring is a hollow structure and is connected to the support frame, and a circular array outside the fixing ring is provided with holes; a card block sleeved inside the hole, a fixing plate installed at one end of the card block, a limiting plate arranged at the top of the fixing plate, and a spring sheet installed on the inner wall of the hole and in contact with the outside of the card block; the fixing assembly comprises a movable cylinder installed inside the knob assembly and located inside the support frame, a plurality of limiting rods sleeved on the bottom of the movable cylinder, and a second spring connected to the tops of the plurality of limiting rods.

Optionally, the knob assembly is rotated to move downward along the outside of the support frame, and the movable cylinder, the second spring and the limit rod are pushed, so that the gas inside the support frame is squeezed into the fixed ring by the downward movement of the movable cylinder, so that the internal air pressure gradually increases, and the card block is pushed outward to contact the inner wall of the groove at the top of the bone screw.

Optionally, the movable cylinder moves downward to squeeze the gas into the fixing ring, so that the block contacts the groove at the top of the bone screw, and drives the limiting rod to contact the fixing plate and the top of the limiting plate to limit it.

Optionally, the knob assembly includes a transmission ring sleeved on the outside of the support frame, a connecting ring sleeved on the bottom of the transmission ring, and a guide rod arranged on the top of the connecting ring;

A rectangular groove is provided on the outside of the transmission ring, and one end of the rectangular groove is in an arc shape;

A lever is hinged inside the rectangular slot, and a first spring telescopic rod slides at the bottom of the lever.

Optionally, the transmission ring is rotated counterclockwise to move downward, driving the lever and the first spring telescopic rod to gradually expand outward along the guide rod, and the screw can be removed by holding the lever and rotating the transmission ring.

Optionally, the guide rod is threaded, and a T-shaped groove is provided at the bottom of the lever for the first spring telescopic rod to slide.

Optionally, the transmission assembly includes a connecting block fixed to the inner wall of the connecting ring, a connecting frame fixed to the outside of the support frame, a pushing rod hinged to the inside of the connecting frame, a second spring telescopic rod hinged between the pushing rod and the connecting ring, and a first spring connected between the support frame and the connecting block for resetting.

Optionally, a guide groove for the connection block to slide is provided on the outside of the support frame, and the movable cylinder is connected to the inner wall of the connection block.

Optionally, the stabilizing assembly includes a fixing rod fixed to the bottom of the connecting block, a clamping block hinged to the bottom of the fixing rod, and a rubber pad fixed to the inner wall of the clamping block.

Optionally, the transmission ring moves downward to push the fixing rod, the clamping block and the rubber pad, and the clamping block is disengaged from contact with the outside of the support frame. At the same time, one end of the pushing rod is pushed by the second spring telescopic rod, and the clamping block can be pushed by the lower end of the pushing rod to rotate at the hinge so that it contacts the outside of the bone screw.

Compared with the prior art, the present invention has at least the following beneficial effects:

In the above scheme, the movable cylinder is pushed downward by rotating the knob assembly, and the movable cylinder pushes the gas inside the support frame downward to make it enter the fixed ring, so that the internal air pressure gradually increases, and pushes the fixed plate and the block outward respectively. The outer end of the block contacts the inner wall of the groove at the top of the bone screw, and the knob assembly continues to rotate to push the movable cylinder downward. The bottom of the limit rod contacts the fixed plate, the limit plate contacts the outside of the block, and compresses the second spring. The block is limited by the limit rod to avoid loosening of the block during rotation, thereby pushing the block through the air pressure inside the fixed ring to improve the stability between the block and the bone screw, and avoiding thread slippage during rotation.

By rotating the transmission ring counterclockwise, the connecting ring, the fixing assembly, the stabilizing assembly and the transmission assembly are pushed downward under the action of the thread on the support frame surface. The connecting ring moves downward to push the fixing rod, the clamping block and the rubber pad. The clamping block contacts the outside of the bone screw during the downward movement, and the lower end of the push rod pushes the outside of the clamping block to rotate at the hinge, so that the rubber pad contacts the outside of the bone screw. The transmission ring is rotated counterclockwise to gradually increase the friction between the rubber pad and the bone screw, so that the bone screw can be easily removed.

The transmission ring is rotated to move downward along the outside of the support frame, and the docking assembly, the stabilizing assembly and the fixing assembly are pushed respectively to fix the bone screw. The transmission ring is continuously rotated counterclockwise and continuously moved downward during rotation, thereby improving the stability between the docking assembly, the stabilizing assembly, the transmission assembly and the bone screw. At the same time, the bone screw can be taken out during the rotation. The downward rotation of the transmission ring drives the lever and the first spring telescopic rod, and under the guidance of the guide rod, the lever is gradually opened. Medical staff can rotate the transmission ring by holding the lever, thereby taking out the bone screw more labor-saving.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

FIG1 is a schematic diagram of the three-dimensional structure of a clinical orthopedic nail removal device;

FIG2 is a schematic diagram of the internal plan of a clinical orthopedic nail removal device;

FIG3 is a schematic diagram of a three-dimensional exploded structure of a clinical orthopedic nail removal device;

FIG4 is a schematic diagram of the top view of the structure of a clinical orthopedic nail removal device;

FIG5 is a schematic diagram of the matching structure of the transmission ring and the connecting ring;

FIG6 is a schematic diagram of the exploded structure of the lever, the first spring telescopic rod and the guide rod;

FIG7 is a schematic diagram of the internal structure of the fixing assembly;

FIG. 8 is a schematic diagram of the internal structure of the docking assembly.

[reference numerals]

100, support frame; 200, knob assembly; 201, transmission ring; 202, connecting ring; 203, guide rod; 204, lever; 205, first spring telescopic rod; 300, stabilizing assembly; 301, fixing rod; 302, clamping block; 303, rubber pad; 400, transmission assembly; 401, connecting frame; 402, second spring telescopic rod; 403, first spring; 404, pushing rod; 405, connecting block; 500, docking assembly; 501, fixing ring; 502, clamping block; 503, fixing plate; 504, limiting plate; 505, spring sheet; 600, fixing assembly; 601, movable cylinder; 602, second spring; 603, limiting rod.

As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments.

Detailed ways

The following is a detailed description of a clinical orthopedic nail removal device provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

In addition, spatially relative terms such as "under," "beneath," "lower," "over," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

As shown in Figures 1 to 8, an embodiment of the present invention provides a clinical orthopedic nail removal device, including a support frame 100, a knob assembly 200 sleeved on the outside of the support frame 100, a fixing assembly 600 installed inside the knob assembly 200, a transmission assembly 400 hinged to the bottom of the knob assembly 200, a stabilizing assembly 300 fixed to the bottom of the knob assembly 200 and sliding on the outside of the support frame 100, and a docking assembly 500 arranged at the bottom of the support frame 100; the outside of the support frame 100 is provided with a counterclockwise thread; the docking assembly 500 includes a fixing ring 501 installed at the bottom of the support frame 100, a fixing ring 501 fixed to the bottom of the support frame 100, and a fixing ring 501 fixed to the bottom of the support frame 100. The interior of the fixed ring 501 is a hollow structure and is connected to the support frame 100. The outer annular array of holes is opened on the fixed ring 501; a block 502 is sleeved inside the hole, a fixed plate 503 is installed on one end of the block 502, a limit plate 504 is arranged on the top of the fixed plate 503, and a spring sheet 505 is installed on the inner wall of the hole and contacts the outside of the block 502; the fixing assembly 600 includes a movable cylinder 601 installed inside the knob assembly 200 and located inside the support frame 100, a plurality of limit rods 603 sleeved on the bottom of the movable cylinder 601, and a second spring 602 connected to the top of the plurality of limit rods 603. The knob assembly 200 is rotated and moved downward along the outside of the support frame 100, and the movable cylinder 601, the second spring 602 and the limit rod 603 are pushed. The movable cylinder 601 moves downward to squeeze the gas inside the support frame 100 into the fixed ring 501, so that the internal air pressure gradually increases, and the block 502 is pushed outward to contact the inner wall of the groove at the top of the bone screw.

The movable cylinder 601 moves downward to squeeze the gas into the fixing ring 501, so that the block 502 contacts the groove at the top of the bone screw, and drives the limiting rod 603 to contact the top of the fixing plate 503 and the limiting plate 504 to limit it.

During the bone screw surgery, the fixing ring 501 is placed in the groove at the top of the bone screw, and the knob assembly 200 is rotated counterclockwise to move downward along the surface of the support frame 100, driving the movable cylinder 601, the second spring 602 and the limit rod 603 to move downward. Since the movable cylinder 601 is in contact with the inside of the support frame 100, the gas inside the support frame 100 is squeezed into the fixing ring 501 during the downward movement of the movable cylinder 601, so that the internal air pressure gradually increases and pushes the block 502 outward. The block 502 squeezes the spring sheet 505 outward, so that the outer end of the block 502 contacts the inner wall of the groove at the top of the bone screw, thereby improving the stability between the block 502 and the bone screw through the air pressure inside the fixing ring 501, and at the same time, it can be adapted to bone screws of different sizes and models;

At the same time, according to common sense, the screw is advanced clockwise and retracted counterclockwise. By rotating the knob assembly 200 in the opposite direction, the fixing assembly 600 is pushed downward to make the block 502 contact the inner wall of the groove at the top of the bone screw. After the contact is completed, continue to rotate the knob assembly 200 counterclockwise to drive the docking assembly 500 to remove the bone screw.

As shown in Figures 3 to 6, the knob assembly 200 includes a transmission ring 201 sleeved on the outside of the support frame 100, a connecting ring 202 sleeved on the bottom of the transmission ring 201, and a guide rod 203 arranged on the top of the connecting ring 202; a rectangular groove is provided on the outside of the transmission ring 201, and one end of the rectangular groove is in an arc shape; a lever 204 is hinged inside the rectangular groove, and a first spring telescopic rod 205 slides at the bottom of the lever 204; the guide rod 203 is threaded, and a "T"-shaped groove is provided at the bottom of the lever 204 for the first spring telescopic rod 205 to slide.

The transmission ring 201 is rotated counterclockwise to move downward, driving the lever 204 and the first spring telescopic rod 205 to gradually expand outward along the guide rod 203 , and the screw can be removed by holding the lever 204 and rotating the transmission ring 201 .

The transmission ring 201 is rotated counterclockwise and moves downward along the external thread of the support frame 100. During the rotation of the transmission ring 201, the lever 204 and the first spring telescopic rod 205 are driven to gradually expand outward through the guidance of the guide rod 203. At the same time, during the downward movement of the transmission ring 201, the fixing assembly 600 and the docking assembly 500 are driven to connect with the bone screw. The force of rotating the transmission ring 201 will gradually increase, and the force range of the transmission ring 201 is expanded by the lever 204. The medical staff can hold the lever 204 to rotate the transmission ring 201, which can reduce the force required for removing the bone screw, thereby facilitating the removal of the bone screw.

As shown in FIGS. 2 to 5 , the transmission assembly 400 includes a connection block 405 fixedly mounted on the inner wall of the connection ring 202, a connection frame 401 fixedly mounted on the outside of the support frame 100, a push rod 404 hinged to the inside of the connection frame 401, a second spring telescopic rod 402 hinged between the push rod 404 and the connection ring 202, and a first spring 403 connected between the support frame 100 and the connection block 405 for resetting; a guide groove for sliding the connection block 405 is provided on the outside of the support frame 100, and the movable cylinder 601 is connected to the inner wall of the connection block 405;

The stabilizing assembly 300 includes a fixing rod 301 fixed to the bottom of the connecting block 405, a clamping block 302 hinged to the bottom of the fixing rod 301, and a rubber pad 303 fixed to the inner wall of the clamping block 302; the transmission ring 201 moves downward to push the fixing rod 301, the clamping block 302 and the rubber pad 303, and the clamping block 302 is separated from the contact with the outside of the support frame 100, and at the same time, the second spring telescopic rod 402 pushes one end of the pushing rod 404, and the clamping block 302 can be pushed to rotate at the hinge through the lower end of the pushing rod 404, so that it contacts the outside of the bone screw, and the transmission ring 201 is rotated counterclockwise along the surface of the support frame 100. The surface thread moves downward, pushing the fixing rod 301, the clamping block 302 and the rubber pad 303 during the downward movement, and the clamping block 302 moves downward and disengages from the contact with the outside of the support frame 100, while pushing the second spring telescopic rod 402 and one end of the pushing rod 404, and the pushing rod 404 rotates at the hinge. During the downward movement of the clamping block 302, it contacts the outside of the bone screw, and the lower end of the pushing rod 404 pushes the outside of the clamping block 302 to rotate at the hinge, thereby continuously moving downward through the transmission ring 201 to compress the second spring telescopic rod 402 to accumulate force, thereby increasing the friction between the clamping block 302 and the outside of the bone screw, thereby facilitating the removal of the bone screw.

According to the working principle of the present invention, during the bone screw removal operation, the bone screw is exposed to the outside and its surface is simply cleaned. The medical staff holds the support frame 100 and places the fixing ring 501 in the groove at the top of the bone screw. The transmission ring 201 is rotated counterclockwise. Under the action of the thread on the surface of the support frame 100, the connecting ring 202, the fixing assembly 600, the stabilizing assembly 300 and the transmission assembly 400 are pushed downward. The connecting ring 202 moves downward to push the fixing rod 301, the clamping block 302 and the rubber pad 303, and at the same time pushes the second spring telescopic rod 402 and one end of the pushing rod 404. The pushing rod 404 rotates at the hinge. The clamping block 302 contacts the outside of the bone screw during the downward movement, and pushes the outside of the clamping block 302 through the lower end of the pushing rod 404 to make it rotate at the hinge. The rubber pad 303 contacts the outside of the bone screw.

During the downward movement of the connecting ring 202, the movable cylinder 601 is pushed. Since there is a sealing structure between the outer wall of the movable cylinder 601 and the inner wall of the support frame 100, the movable cylinder 601 moves downward to push the gas inside the support frame 100 to enter the fixed ring 501. The internal air pressure gradually increases, and pushes the fixed plate 503 and the block 502 outward respectively. The block 502 moves outward to squeeze the spring sheet 505. The outer end of the block 502 contacts the inner wall of the groove at the top of the bone screw, and the transmission ring 201 continues to rotate to push the connecting ring 202 and the movable cylinder 601 downward. At this time, the bottom of the limiting rod 603 contacts the fixed plate 503, the limiting plate 504 and the outside of the block 502 respectively, and compresses the second spring 602, so that the block 502 is limited by the limiting rod 603 to prevent the block 502 from loosening during rotation.

The transmission ring 201 is rotated counterclockwise to move downward under the action of the external thread of the support frame 100, and the docking assembly 500, the stabilizing assembly 300 and the fixing assembly 600 are respectively pushed to fix the bone screw. The transmission ring 201 is continuously rotated counterclockwise. According to the knowledge of the personnel in the relevant field, the bone screw is advanced when it is rotated clockwise and retreated when it is rotated counterclockwise. The transmission ring 201 is continuously moved downward during the rotation, thereby improving the stability between the docking assembly 500, the stabilizing assembly 300, the transmission assembly 400 and the bone screw. At the same time, the bone screw can be taken out during the rotation. The transmission ring 201 rotates downward to drive the lever 204 and the first spring telescopic rod 205. Under the guidance of the guide rod 203, the lever 204 is gradually opened. At this time, the medical staff can rotate the transmission ring 201 by holding the lever 204, thereby taking out the bone screw more labor-saving.

The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims (10)

1. A clinical orthopedic nail removal device, characterized in that it comprises a support frame, a knob assembly sleeved on the outside of the support frame, a fixing assembly installed inside the knob assembly, a transmission assembly hinged to the bottom of the knob assembly, a stabilizing assembly fixed to the bottom of the knob assembly and sliding on the outside of the support frame, and a docking assembly arranged at the bottom of the support frame; The support frame is provided with a counterclockwise thread on the outside; The docking assembly includes a fixing ring installed at the bottom of the support frame, the fixing ring is hollow inside and communicates with the support frame, and the fixing ring is provided with holes in an annular array outside; A card block sleeved inside the hole, a fixing plate installed at one end of the card block, a limit plate arranged on the top of the fixing plate, and a spring sheet installed on the inner wall of the hole and in contact with the outside of the card block; The fixing assembly includes a movable cylinder installed inside the knob assembly and located inside the support frame, a plurality of limiting rods sleeved on the bottom of the movable cylinder, and a second spring connected to the top of the plurality of limiting rods. 2. The clinical orthopedic nail removal device according to claim 1 is characterized in that the knob assembly is rotated to move downward along the outside of the support frame and push the movable cylinder, the second spring and the limit rod. The movable cylinder moves downward to squeeze the gas inside the support frame into the fixed ring, so that the internal air pressure gradually increases, and the card block is pushed outward to contact the inner wall of the groove at the top of the bone screw. 3. The clinical orthopedic nail removal device according to claim 1 is characterized in that the movable cylinder moves downward to squeeze the gas into the fixed ring, so that the block contacts the groove at the top of the bone screw, driving the limit rod to contact the fixed plate and the top of the limit plate to limit it. 4. The clinical orthopedic nail removal device according to claim 1, characterized in that the knob assembly comprises a transmission ring sleeved on the outside of the support frame, a connecting ring sleeved on the bottom of the transmission ring, and a guide rod arranged on the top of the connecting ring; A rectangular groove is provided on the outside of the transmission ring, and one end of the rectangular groove is in an arc shape; A lever is hinged inside the rectangular slot, and a first spring telescopic rod slides at the bottom of the lever. 5. The clinical orthopedic nail removal device according to claim 4 is characterized in that the transmission ring is rotated counterclockwise to move downward, driving the lever and the first spring telescopic rod to gradually expand outward along the guide rod, and the screw can be removed by holding the lever and rotating the transmission ring. 6. The clinical orthopedic nail removal device according to claim 4 is characterized in that the guide rod is threaded, and a "T"-shaped groove is provided at the bottom of the lever for the first spring telescopic rod to slide. 7. The clinical orthopedic nail removal device according to claim 4 is characterized in that the transmission assembly includes a connecting block fixedly mounted on the inner wall of the connecting ring, a connecting frame fixedly mounted on the outside of the support frame, a pushing rod hinged to the inside of the connecting frame, a second spring telescopic rod hinged between the pushing rod and the connecting ring, and a first spring connected between the support frame and the connecting block for resetting. 8. The clinical orthopedic nail removal device according to claim 7 is characterized in that a guide groove for the connection block to slide is provided on the outside of the support frame, and the movable cylinder is connected to the inner wall of the connection block. 9. The clinical orthopedic nail removal device according to claim 7 is characterized in that the stabilizing component includes a fixing rod fixed to the bottom of the connecting block, a clamping block hinged to the bottom of the fixing rod, and a rubber pad fixed to the inner wall of the clamping block. 10. The clinical orthopedic nail removal device according to claim 7 is characterized in that the transmission ring moves downward to push the fixing rod, the clamping block and the rubber pad, so that the clamping block is separated from the contact with the outside of the support frame, and at the same time, the second spring telescopic rod pushes one end of the pushing rod, so that the clamping block can be pushed by the lower end of the pushing rod to rotate at the hinge, so that it contacts the outside of the bone screw.