Headless compression fixing screw for proximal femur

Abstract

The invention provides a proximal femur headless compression fixing screw, and belongs to the technical field of femur fixing screws. Comprising a thighbone screw, and a nut, a rope hole, a rope, an anti-falling ball, an extension hole and a cover plate are arranged on one side of the thighbone screw. A rope is arranged to be connected with a nut, an anti-falling ball prevents a cover plate from falling, an extrusion plate extrudes the nut through an extrusion spring, a cavity reduces the weight of a femoral screw, an extension hole serves as the storage position of the rope and the anti-falling ball, and a sliding plate slides to cover the upper surface of the nut to fix the nut. The sliding plate is fixed through the fixing base and the fixing hole, the handrail and the operation box are connected through the fixing plate, the positioning rubber rod is placed in the femoral bone punching position, the femoral screw enters the femur along the positioning rubber rod, the bone is extruded through surface threads, and the operation box, the femoral screw, the clamping plate and other structures are arranged. The problem that osteoporosis patients cannot use screws is solved, and the recovery effect can be accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of femoral fixing screws, and in particular to a proximal femoral headless compression fixing screw. Background Art

[0002] The femur, also known as the thigh bone, hip bone, and tibia, is the longest tubular bone in the human body. The upper end of the femoral head and the acetabulum form the hip joint, and the lower end forms the knee joint with the patella and the upper end of the tibia, supporting the body weight. The femur is the longest bone in the body and is divided into two ends. There is a round femoral head at the proximal end, which is 2 / 3 of the sphere and points inward and forward, forming a hip joint with the acetabulum. There is a small fossa in the center of the femoral head called the femoral head fossa. The narrow part below the femoral head is the femoral neck. The angle between the femoral neck and the femoral body is 125°. The female pelvis is wide and this angle is smaller. There are two large protrusions on the distal side of the femoral neck: the greater trochanter and the lesser trochanter are the muscle attachment points. The greater trochanter convexly points upward and outward, and there is a concave trochanteric fossa on its inner side. The lesser trochanter is below, inside, and behind the greater trochanter. The obvious protrusion connecting the two trochanters in the back is the intertrochanteric crest. There is an intertrochanteric line connecting them in the front.

[0003] Osteoporosis is a diagnosable and treatable disease. It is a systemic bone disease caused by a variety of reasons, which leads to a decrease in bone density and bone quality, destruction of bone microstructure, increased bone brittleness, and easy fracture. Osteoporosis is divided into two major categories: primary and secondary. Primary osteoporosis is further divided into three types: postmenopausal osteoporosis (type I), senile osteoporosis (type II) and idiopathic osteoporosis (including adolescent type). Postmenopausal osteoporosis generally occurs in women within 5 to 10 years after menopause; senile osteoporosis generally refers to osteoporosis that occurs in the elderly after the age of 70; and idiopathic osteoporosis mainly occurs in adolescents, and the cause is still unknown.

[0004] In actual use, ordinary people's fractures can be fixed with normal screws and other structures. However, people with diseases such as osteoporosis will be prone to screw thread slippage and secondary fractures after using traditional screws due to the decrease in bone hardness. Currently, normal screws only have a threaded structure on the outer surface to fix to the bone. When people with osteoporosis use such screws, they will not be able to install such screws due to osteoporosis. Even if they are installed, there is a high possibility that they cannot be fixed and problems such as screw slippage will occur, causing the screw to fall off. Since bones are more easily broken due to osteoporosis, the problem of osteoporosis being unable to be used can be solved in a targeted manner according to such characteristics. The broken bone blocks can be connected to the screws to establish a connection effect, thereby enhancing the stability of the screws. The screws cannot be fixed using a traditional screwdriver due to their internal structure. Therefore, the present application provides a proximal femoral headless compression fixation screw to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a proximal femoral headless compression fixation screw to solve the problem that existing osteoporosis patients cannot use normal screws and normal screws cannot guarantee their fixation effect.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A headless compression fixation screw for the proximal end of the femur comprises a femoral screw, a nut is provided on one side of the femoral screw, a rope hole is provided inside the nut, a rope is inserted inside the rope hole, an anti-drop ball is provided at one end of the rope, an extension hole is provided inside the femoral screw, a cover plate is provided at the other end of the rope, a knob is provided on one side of the cover plate, a cavity is provided inside the femoral screw, a clamping groove is provided on the outer surface of the femoral screw, an operating hole is provided inside the femoral screw, an extrusion plate is clamped inside the nut, an operating rod is provided on one side of the extrusion plate, an extrusion spring is inserted on the upper surface of the extrusion plate, a connecting column is provided at one end of the extrusion plate, a clamping plate is sleeved on the outer surface of the connecting column, and a connecting groove is clamped on the outer surface of the clamping plate.

[0008] Optionally, the number of the ropes is four, the number of the anti-drop balls is four, and the ropes and the anti-drop balls are adapted to each other.

[0009] Optionally, the number of the cavities is two, and the number of the card slots is two.

[0010] Optionally, the number of the extrusion plates is four, the number of the extrusion springs is two, the number of the clamping plates is four, and the extrusion plates and the clamping plates are adapted to each other.

[0011] Optionally, an operation box is provided on the outer surface of the connecting groove, and a slide plate is inserted into the upper surface of the operation box.

[0012] Optionally, a through hole is formed on the upper surface of the slide plate, and a fixing seat is inserted into the upper surface of the slide plate.

[0013] Optionally, a rotating shaft is inserted into the interior of the operation box, and a return spring is sleeved on the outer surface of the rotating shaft.

[0014] Optionally, an armrest is sleeved on the outer surface of the rotating shaft, and a fixing plate is inserted into one side of the armrest.

[0015] Optionally, a storage slot is provided on the upper surface of the operation box, and fixing holes are opened on the upper surface of the operation box, and the number of the fixing holes is six.

[0016] Optionally, a positioning rubber rod is inserted into the interior of the operating hole.

[0017] A method for using a proximal femoral headless compression fixation screw comprises the following steps:

[0018] Step 1: First, perform the necessary prerequisite operations for femoral fracture surgery, then the doctor needs to observe the fracture site of the patient's femur, align the fracture site, and perform a drilling operation on the fracture site through a drilling device;

[0019] Step 2: First, you need to use both hands to pinch the femoral screw and the knob to take out the cover plate, and use the anti-drop ball to clamp one end of the nut to prevent the rope from falling out. Then take the card plate out of the storage slot and dock it with the nut to facilitate subsequent fixation. At this time, you can clamp the cover plate and the card plate into the upper surface of the connecting groove, slide the slide plate to the upper surface of the connecting groove, and fix the slide plate through the fixing seat and the fixing hole to prevent it from moving;

[0020] Step 3: The next step is to rotate the two armrests and connect the armrests to the operation box through the fixing plate to ensure that the armrests will not rebound due to the torsion effect of the return spring and the shaft during use;

[0021] Step 4: First, insert the positioning rubber rod into the previously punched position, and then insert one end of the positioning rubber rod into the operating hole, and let the positioning rubber rod come out from the perforation on the upper surface of the slide along the connecting groove. During this period, the doctor will control the rotation of the femoral screw into the inside of the punched part through two handrails. The slots on both sides of the femoral screw will accumulate osteoporotic bone residues, and the firmness of the femoral screw will be strengthened by the bone residues and the positioning rubber rod.

[0022] Step 5. Finally, take the cover plate and the card plate out from the inside of the connecting groove, cut off the excess positioning rubber rod, and insert the cover plate into the inside of the nut to close the nut.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] In the above scheme, a cover plate is provided which is pulled out by pinching the knob by hand, the cover plate is connected to the nut by a rope, an anti-drop ball prevents the cover plate from falling, the extrusion plate squeezes the nut by an extrusion spring, the cavity reduces the weight of the femoral screw, and the extension hole is used as a storage position for the rope and the anti-drop ball. The slide plate is slid to cover the slide plate on the upper surface of the nut to fix the nut, the slide plate is fixed by the fixing seat and the fixing hole, the armrest is opened, the armrest is connected to one side of the operation box by the fixing plate, so as to fix the armrest, the positioning rubber rod is put into the punched part of the femur, the femoral screw enters the inside of the femur along the positioning rubber rod for fixing, the surrounding bones are squeezed by the surface thread to make the debris enter the inside of the card slot, the stability of the femoral screw is enhanced, the excess part of the positioning rubber rod is cut off, and the cover The plate enters the nut to prevent the positioning rubber rod from falling, the fixing plate is reset, and the armrest rebounds to its original position through the reset spring. The operating rod is pinched to separate the card plate from the nut, and the card plate and the remaining positioning rubber rods are placed in the storage slot. The above operation can effectively strengthen the connection between the screw and the bone. When the screw is installed, it will force a part of the osteoporotic bone to form bone fragments. The broken small bones will enter the inside of the card slot and fit with the screws, so that the screws can be better fixed. According to the above structure, the screws can be better fixed inside the bones. When the broken small bones are close to the positioning rubber rod, the broken small bones will apply pressure to the positioning rubber rod, and the positioning rubber rod will also apply force to the broken small bones due to its own elasticity, so the screws can be better fixed.

[0025] Through the operation box, femoral screws and clamping plates and other structures, the use effect of the equipment is greatly enhanced, effectively solving the problem that osteoporosis patients cannot use screws, allowing patients to recover from fractures and other injuries faster, greatly alleviating the pain of osteoporosis patients.

[0026] In summary, the present invention has the advantages of better fixation effect, convenient installation and prevention of secondary fractures and injuries caused by osteoporosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0028] Figure 1 This is a schematic diagram of the structure of the proximal femoral headless compression fixation screw proposed by the present invention;

[0029] Figure 2 This is a schematic diagram of the exploded structure of the surface parts of the femoral screw of the proximal femoral headless compression fixation screw proposed by the present invention;

[0030] Figure 3 This is a schematic diagram of the exploded structure of the surface parts of the operating box of the proximal femoral headless compression fixation screw proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the overall connection explosion structure of the proximal femoral headless compression fixation screw device proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the exploded structure of the internal parts of the proximal femoral headless compression fixation screw clamp proposed by the present invention;

[0033] Figure 6 This is an overall plan view of the proximal femoral headless compression fixation screw device proposed by the present invention;

[0034] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the proximal femoral headless compression fixation screw proposed by the present invention.

[0035] [Reference Signs]

[0036] 1. Femoral screw; 2. Nut; 3. Rope hole; 4. Rope; 5. Anti-drop ball; 6. Extension hole; 7. Cover plate; 8. Knob; 9. Cavity; 10. Slot; 11. Operating hole; 12. Extrusion plate; 13. Operating rod; 14. Extrusion spring; 15. Connecting column; 16. Card plate; 17. Connecting groove; 18. Operating box; 19. Slide plate; 20. Perforation; 21. Fixed seat; 22. Rotating shaft; 23. Reset spring; 24. Armrest; 25. Fixed plate; 26. Storage slot; 27. Fixed hole; 28. Positioning rubber rod.

[0037] 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, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0038] The following is a detailed description of a proximal femoral headless compression fixation screw 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 alternatives 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.

[0039] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "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).

[0040] 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.

[0041] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0042] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "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. 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.

[0043] like Figure 2 , Figure 5 and Figure 7As shown, an embodiment of the present invention provides a proximal femoral headless compression fixation screw, comprising a femoral screw 1, a nut 2 is provided on one side of the femoral screw 1, a rope hole 3 is provided inside the nut 2, a rope 4 is inserted inside the rope hole 3, an anti-drop ball 5 is provided at one end of the rope 4, an extension hole 6 is provided inside the femoral screw 1, a cover plate 7 is provided at the other end of the rope 4, a knob 8 is provided on one side of the cover plate 7, a cavity 9 is provided inside the femoral screw 1, a card slot 10 is provided on the outer surface of the femoral screw 1, an operating hole 11 is provided inside the femoral screw 1, an extrusion plate 12 is clamped inside the nut 2, and an operating rod 1 is provided on one side of the extrusion plate 12 3. An extrusion spring 14 is inserted on the upper surface of the extrusion plate 12. A connecting column 15 is provided at one end of the extrusion plate 12. A clamping plate 16 is sleeved on the outer surface of the connecting column 15. The compression spring (compression spring) is a spiral spring that withstands axial pressure. Springs are generally divided into equal-pitch springs and variable-pitch springs. The shapes of compression springs include: cylindrical, conical, convex and concave, as well as a small amount of non-circular shapes. There is a certain gap between the coils of the compression spring. When subjected to external loads, the spring contracts and deforms to store deformation energy. Variable-pitch springs are becoming more and more common. They are no longer just equal-pitch springs. Variable-pitch springs can play different roles in different environments.

[0044] During use, it is necessary to first make a hole on the surface of the patient's femoral fracture position, then pinch the knob 8 by hand, pull out the cover plate 7, the cover plate 7 is connected to the nut 2 through the rope 4, and the anti-drop ball 5 prevents the cover plate 7 from falling down, and then connect the clamping plate 16 with the nut 2, the upper and lower extrusion plates 12 inside the clamping plate 16 squeeze the inside of the nut 2 through the extrusion spring 14, so that the clamping plate 16 is fixed to one side of the nut 2, and then the nut 2 can be placed in the connection groove 17 for fixing, the cavity 9 inside the femoral screw 1 is mainly to reduce the weight of the femoral screw 1 and reduce the cost of the screw, the lightweight screw can effectively reduce the pressure on the bone, so that the osteoporotic person can recover faster, the extension hole 6 is used as the storage position of the rope 4 and the anti-drop ball 5, and the connection between the screw and the bone can be effectively strengthened through the above operation, and the screw will force a part of the osteoporotic bone to form bone fragments during installation, and the broken small bones will enter the inside of the clamping groove and fit with the screw, so as to better fix the screw.

[0045] like Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, in this embodiment, the outer surface of the card plate 16 is clamped with a connecting groove 17, the number of ropes 4 is four, the number of anti-drop balls 5 is four, the ropes 4 and the anti-drop balls 5 are adapted to each other, the number of cavities 9 is two, the number of slots 10 is two, the number of extrusion plates 12 is four, the number of extrusion springs 14 is two, the number of card plates 16 is four, the extrusion plates 12 and the card plates 16 are adapted to each other, an operation box 18 is provided on the outer surface of the connecting groove 17, a slide plate 19 is inserted on the upper surface of the operation box 18, a through hole 20 is provided on the upper surface of the slide plate 19, a fixing seat 21 is inserted on the upper surface of the slide plate 19, a rotating shaft 22 is inserted inside the operation box 18, a reset spring 23 is sleeved on the outer surface of the rotating shaft 22, and a handrail is sleeved on the outer surface of the rotating shaft 22 24. A fixing plate 25 is inserted on one side of the armrest 24. A storage slot 26 is provided on the upper surface of the operation box 18. A fixing hole 27 is opened on the upper surface of the operation box 18. The number of the fixing holes 27 is six. A positioning rubber rod 28 is inserted inside the operation hole 11. The torsion spring (torsion spring) uses the principle of a lever to twist or rotate a soft and tough elastic material to give it great mechanical energy. It is a spring that withstands torsional deformation. Its working part is also each circle either tightly around or separately around. The end structure of the torsion spring is a torsion arm processed into various shapes, from single to double torsion, and even various torsion rod deformations, which can be formed according to the design. The torsion spring is often used in the balancing mechanism in machinery and is widely used in industrial production such as automobiles, machine tools, and electrical appliances.

[0046] After the nut 2 is placed into the interior of the connecting groove 17, the sliding plate 19 can be used to cover the upper surface of the nut 2, thereby fixing the nut 2 to prevent it from falling off, and the sliding plate 19 can be fixed by the fixing seat 21 and the fixing hole 27 to prevent the sliding plate 19 from running around. After fixing, the armrests 24 on both sides can be opened. When the armrests 24 on both sides are opened, the armrests 24 can be connected to one side of the operation box 18 through the fixing plate 25 to fix the armrests 24. After fixing, the two armrests 24 can be held with both hands to rotate the femoral screw 1 for femoral fracture surgery fixation operation. First, the positioning rubber rod 28 needs to be placed in the femoral perforation part, and then the femoral screw 1 is allowed to enter the femur along the positioning rubber rod 28 for fixation. The positioning rubber rod 28 has two functions. The first function is to facilitate positioning, and the second function is to prevent bone debris from clogging, so as to prevent the femoral screw 1 from being unable to be removed later. When the femoral screw 1 enters After reaching the inside of the femur, the surrounding bones are squeezed through the surface threads, so that some debris enters the inside of the card slot 10. This operation can effectively enhance the stability of the femoral screw 1. After the operation is completed, the nut 2 and the knob 8 need to be taken out from the inside of the connecting groove 17, and the excess part of the positioning rubber rod 28 is cut with surgical scissors. The cover plate 7 enters the nut 2 to prevent the positioning rubber rod 28 from falling out, and the fixing plate 25 returns to the inside of the armrest 24. The armrest 24 will be rebounded to its original position due to the reset spring 23. The two operating rods 13 can be pinched to allow the card plate 16 to be separated from the nut 2, and the card plate 16 and the remaining positioning rubber rod 28 can be placed in the storage slot 26. According to the above structure, the screw can be better fixed inside the bone. When the broken small bones are close to the positioning rubber rod, the broken small bones will apply pressure to the positioning rubber rod, and the positioning rubber rod will also apply force to the broken small bones due to its own elasticity, so the screw can be better fixed.

[0047] A method for using a proximal femoral headless compression fixation screw comprises the following steps:

[0048] Step 1: First, perform the necessary prerequisite operations for femoral fracture surgery, then the doctor needs to observe the fracture site of the patient's femur, align the fracture site, and perform a drilling operation on the fracture site through a drilling device;

[0049] Step 2: First, you need to use both hands to pinch the femoral screw and the knob to take out the cover plate, and use the anti-drop ball to clamp one end of the nut to prevent the rope from falling out. Then take the card plate out of the storage slot and dock it with the nut to facilitate subsequent fixation. At this time, you can clamp the cover plate and the card plate into the upper surface of the connecting groove, slide the slide plate to the upper surface of the connecting groove, and fix the slide plate through the fixing seat and the fixing hole to prevent it from moving;

[0050] Step 3: The next step is to rotate the two armrests and connect the armrests to the operation box through the fixing plate to ensure that the armrests will not rebound due to the torsion effect of the return spring and the shaft during use;

[0051] Step 4: First, insert the positioning rubber rod into the previously punched position, and then insert one end of the positioning rubber rod into the operating hole, and let the positioning rubber rod come out from the perforation on the upper surface of the slide along the connecting groove. During this period, the doctor will control the rotation of the femoral screw into the inside of the punched part through two handrails. The slots on both sides of the femoral screw will accumulate osteoporotic bone residues, and the firmness of the femoral screw will be strengthened by the bone residues and the positioning rubber rod.

[0052] Step 5. Finally, take the cover plate and the card plate out from the inside of the connecting groove, cut off the excess positioning rubber rod, and insert the cover plate into the inside of the nut to close the nut.

[0053] The technical solution provided by the present invention is that the cover plate is pulled out by pinching the knob with hands, the cover plate is connected to the nut by a rope, the anti-drop ball prevents the cover plate from falling, the extrusion plate squeezes the nut by an extrusion spring, the cavity reduces the weight of the femoral screw, and the extension hole is used as a storage position for the rope and the anti-drop ball, the slide plate is slid to cover the slide plate on the upper surface of the nut to fix the nut, the slide plate is fixed by the fixing seat and the fixing hole, the armrest is opened, the armrest is connected to one side of the operation box by the fixing plate, so as to fix the armrest, the positioning rubber rod is put into the punched part of the femur, the femoral screw enters the inside of the femur along the positioning rubber rod for fixing, the surrounding bones are squeezed by the surface thread, so that the debris enters the inside of the card slot, and the stability of the femoral screw is enhanced, the excess part of the positioning rubber rod is cut, the cover plate enters the nut to prevent the positioning rubber rod from falling, the fixing plate is reset, the armrest rebounds to its original position by the reset spring, and the operating rod is pinched to allow the card to The plate is separated from the nut, and the card plate and the remaining positioning rubber rods are placed in the storage slot. The above operation can effectively strengthen the connection between the screw and the bone. When the screw is installed, it will force a part of the osteoporotic bone to form bone fragments, and the broken small bones will enter the interior of the card slot and fit with the screw, so that the screw can be better fixed. According to the above structure, the screw can be better fixed inside the bone. When the broken small bones are close to the positioning rubber rod, the broken small bones will apply pressure to the positioning rubber rod, and the positioning rubber rod will also apply force to the broken small bones due to its own elasticity, so the screw can be better fixed. Through the operation box, femoral screws and card plate and other structures, the use effect of the equipment is greatly enhanced, and the problem that osteoporosis patients cannot use screws is effectively solved, so that patients can recover from injuries such as fractures faster, which greatly alleviates the pain of osteoporosis patients.

[0054] 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, but 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.

[0055] 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

1. A headless compression fixation screw for the proximal femur, characterized in that: include: A femoral screw, wherein a nut is provided on one side of the femoral screw, a rope hole is provided inside the nut, a rope is inserted inside the rope hole, and an anti-drop ball is provided at one end of the rope; An extension hole is provided inside the femoral screw, a cover plate is provided at the other end of the rope, a knob is provided on one side of the cover plate, a cavity is provided inside the femoral screw, a slot is provided on the outer surface of the femoral screw, an operating hole is provided inside the femoral screw, an extrusion plate is clamped inside the nut, an operating rod is provided on one side of the extrusion plate, an extrusion spring is inserted on the upper surface of the extrusion plate, a connecting column is provided at one end of the extrusion plate, a clamping plate is sleeved on the outer surface of the connecting column, and a connecting groove is clamped on the outer surface of the clamping plate.

2. The proximal femoral headless compression fixation screw according to claim 1, characterized in that: The number of the ropes is four, the number of the anti-drop balls is four, and the ropes and the anti-drop balls are adapted to each other.

3. The proximal femoral headless compression fixation screw according to claim 1, characterized in that: The number of the cavities is two, and the number of the card slots is two.

4. The proximal femoral headless compression fixation screw according to claim 1, characterized in that: The number of the extrusion plates is four, the number of the extrusion springs is two, the number of the clamping plates is four, and the extrusion plates and the clamping plates are adapted to each other.

5. The proximal femoral headless compression fixation screw according to claim 1, characterized in that: An operation box is arranged on the outer surface of the connection groove, and a slide plate is inserted into the upper surface of the operation box.

6. The proximal femoral headless compression fixation screw according to claim 5, characterized in that: The upper surface of the slide plate is provided with a through hole, and the upper surface of the slide plate is plugged with a fixing seat.

7. The proximal femoral headless compression fixation screw according to claim 5, characterized in that: A rotating shaft is inserted into the interior of the operation box, and a return spring is sleeved on the outer surface of the rotating shaft.

8. The proximal femoral headless compression fixation screw according to claim 7, characterized in that: An armrest is sleeved on the outer surface of the rotating shaft, and a fixing plate is inserted on one side of the armrest.

9. The proximal femoral headless compression fixation screw according to claim 5, characterized in that: The upper surface of the operation box is provided with a storage slot, and the upper surface of the operation box is provided with fixing holes, and the number of the fixing holes is six.

10. The proximal femoral headless compression fixation screw according to claim 1, characterized in that: A positioning rubber rod is inserted into the interior of the operating hole.

Images