Internal fixing device for long bone fracture

Abstract

The invention provides an internal fixation device for long bone fracture, and belongs to the technical field of intramedullary fixation. Comprising an integral assembly, and the integral assembly comprises a connecting cylinder. A first circular shaft is pressed to descend, so that a first fixing clamping shaft and a second fixing clamping shaft are shrunk into a connecting cylinder, then the connecting cylinder is inserted into a bone needing to be connected, the broken bone can be effectively and preliminarily fixed through the connecting cylinder, and the first circular shaft is loosened; a first fixing clamping shaft and a second fixing clamping shaft are unfolded under the counter-acting force of a spring, and a first movable circular plate and a second movable circular plate are driven to ascend through a rotating shaft, so that the first fixing clamping shaft and the second fixing clamping shaft can be embedded into holes reserved in bones, and the fixing effect between the fractured bones is further enhanced; and through movement of the second circular shaft, two fractured bones can be effectively attached, meanwhile, the connecting effect of the fractured position is effectively enhanced, and the healing speed after fracture is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of intramedullary fixation, and particularly relates to an internal fixation device for long bone fractures. Background Art

[0002] With the aggravation of population aging, the number of elderly people increases, and the elderly often have osteoporosis problems. The reaction ability of the elderly decreases, and the hip muscles have poor protection. It is very easy to fracture under the action of external forces. Relevant documents report that the proportion of intertrochanteric fractures of the femur in hip fractures is as high as 50%. Due to the structural characteristics at this place, surgical treatment is currently recognized as the best treatment method.

[0003] In orthopedic treatment of fractures, the use of implants is the main means. The implants are mainly metal bone plates. Spherical compression holes, locking threaded holes or combined holes of dynamic compression and locking threads are provided on the bone plates. Different forms of bone screws are used to fix the fracture site, so as to achieve the purpose of treating fracture bone diseases. Among them: for the dynamic compression bone plate, the placement of the compression screw completes the axial compression of the fracture area to form a rigid internal fixation. When such products heal fractures, no callus is formed, which may lead to infection, nonunion and delayed fracture healing; for the locking bone plate, locking threaded holes are provided on the bone plate, and the threads are double-thread structures. Through the locking screws, a relatively stable bridging internal fixation is formed, and secondary bone healing with callus formation will occur.

[0004] The existing patent (publication number: CN115105180U) is a femoral intramedullary fixation device. This device can improve the early fixation effect of the femoral intramedullary fixation device, reduce the probability of rotation and movement of the lag screw in the femoral neck. The lag screw and the stabilizing screw are not arranged in parallel, which can effectively prevent adverse effects such as varus of the proximal femur.

[0005] Therefore, the present application provides an internal fixation device for long bone fractures to meet the needs.

[0006] This device fixes the bone by screwing multiple groups of screws. However, when screwing the screws, if they are screwed too tightly, the pressure on the bone may increase and cause bone fractures. If they are screwed too loosely, a relatively stable internal fixation effect cannot be achieved when setting the bone. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an internal fixation device for long bone fractures to solve the existing problem of stable bone setting.

[0008] To solve the above technical problems, the present invention provides the following technical solutions:

[0009] An internal fixation device for long bone fractures includes an overall component. The overall component includes a connecting cylinder, and a fixing component is slidably connected to the inner wall of the connecting cylinder. A connecting component is slidably connected to the inner wall of the fixing component. The fixing component includes a first circular shaft slidably connected to the inner wall of the connecting cylinder. A first circular groove is formed at the lower end of the surface of the first circular shaft. Two first connecting blocks are fixedly connected to both sides of the top end of the first circular groove. One end of the two first connecting blocks away from the first circular groove is fixedly connected to a first fixing clamping shaft. A first moving circular plate is attached to the bottom end of the first circular groove. Two sides inside the first moving circular plate are rotatably connected to a rotating shaft passing through the first circular shaft. The connecting component includes a movable shaft slidably connected to the inside of the first circular shaft. A threaded lead screw is fixedly connected to the bottom end of the movable shaft. A second circular shaft is rotatably connected to the surface of the threaded lead screw. A second circular groove is formed on the surface of the second circular shaft. A second connecting block is fixedly connected to the top end inner wall of the second circular groove. One end of the second connecting block away from the second circular groove is fixedly connected to a second fixing clamping shaft. A second moving circular plate is attached to the bottom end inner wall of the second circular groove. A fixing plate is fixedly connected to the bottom end of the second circular shaft. A sleeve shaft is provided at the bottom end of the fixing plate. A spring is sleeved on the surface of the sleeve shaft.

[0010] Preferably, two first grooves that fit the first fixing clamping shafts are formed on both sides of the upper end of the surface of the connecting cylinder, and two second grooves that fit the second fixing clamping shafts are formed on both sides of the lower end of the surface of the connecting cylinder. The length of the second groove is greater than that of the first groove.

[0011] Preferably, an avoidance groove that fits the sleeve shaft is formed at the bottom end inner wall of the connecting cylinder.

[0012] Preferably, a knob is installed at the top end of the rotating shaft, and the rotating shaft passes through the second circular shaft and is rotatably connected to the second moving circular plate.

[0013] Preferably, the first fixing clamping shaft and the second fixing clamping shaft are in an inverted conical shape.

[0014] Preferably, two first connecting blocks are provided on both sides of the top end of the first circular groove, and a second connecting block is provided on the top end inner wall of the second circular groove. A second connecting rod is rotatably connected inside the second connecting block. Both ends of the second connecting rod are fixedly connected to the inner wall of the connecting cylinder.

[0015] Preferably, the first moving circular plate is slidably connected to the first circular shaft, and the second moving circular plate is slidably connected to the second circular shaft.

[0016] Preferably, the top end of the spring is attached to the bottom end of the fixing plate, and the bottom end of the spring is fixedly connected to the bottom end inner wall of the connecting cylinder. The sleeve shaft is slidably connected to the spring.

[0017] Preferably, the lower end of the surface of the connecting cylinder is conical, and the fixing plate is slidably connected to the connecting cylinder.

[0018] Preferably, in the closed state, the first fixed clamping shaft and the second fixed clamping shaft are in close fit with the connecting cylinder, and the angle in the open state of the first fixed clamping shaft and the second fixed clamping shaft is 30 degrees.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the above solution, by pressing the first round shaft to descend, the first fixed clamping shaft and the second fixed clamping shaft are contracted into the connecting cylinder, and then the connecting cylinder is inserted into the bone to be connected. Through the connecting cylinder, the broken bone can be effectively preliminarily fixed. At this time, the first round shaft is released, and under the reaction force of the spring, the first fixed clamping shaft and the second fixed clamping shaft are unfolded. Then, the two rotating shafts are rotated, so that the rotating shafts drive the first moving round plate and the second moving round plate to rise, so that the first fixed clamping shaft and the second fixed clamping shaft can be embedded in the holes reserved in the bone, further strengthening the fixing effect between the broken bones. Then, the movable shaft is rotated to drive the second round shaft to move, and the second fixed clamping shaft on the second round shaft is fixed in the broken bone. Through the movement of the second round shaft, the two broken bones can be effectively fitted together, and at the same time, the connection effect at the fracture is effectively enhanced, and the healing speed after fracture is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present disclosure and, together with the specification, are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an internal fixation device for long bone fractures;

[0023] Figure 2 It is an unfolded schematic diagram of an internal fixation device for long bone fractures;

[0024] Figure 3 It is a schematic diagram of the inside of the connecting cylinder of an internal fixation device for long bone fractures;

[0025] Figure 4 It is a schematic diagram of the inside of the first round shaft of an internal fixation device for long bone fractures;

[0026] Figure 5 It is a schematic diagram of the fixing component of an internal fixation device for long bone fractures;

[0027] Figure 6 It is an internal fixation device for long bone fractures Figure 5 The partial enlarged schematic diagram at A in.

[0028] [Reference Numerals]

[0029] 100, Overall Component; 110, Connecting Tube; 111, First Groove; 112, Second Groove; 113, Clearance Groove;

[0030] 200, Fixing Component; 210, First Round Shaft; 211, First Round Groove; 220, First Connecting Block; 221, First Connecting Rod; 230, First Fixed Clamping Shaft; 240, First Movable Round Plate; 250, Rotating Shaft; 251, Knob;

[0031] 300, Connecting Component; 310, Movable Shaft; 320, Threaded Screw Rod; 330, Second Round Shaft; 331, Second Round Groove; 340, Second Connecting Block; 341, Second Connecting Rod; 350, Second Fixed Clamping Shaft; 360, Second Movable Round Plate; 370, Fixed Plate; 380, Sleeve Shaft; 390, Spring.

[0032] As Figures 1-6 shown, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figures, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications still fall within the scope of the appended claims. Detailed Embodiment

[0033] The following describes in detail an internal fixation device for long bone fractures provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0034] It should be noted that in the specification, it is mentioned that "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. Additionally, when combining embodiments to describe specific features, structures or characteristics, implementing such features, structures or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0035] Generally, terms can be understood, at least in part, from their 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 a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, can alternatively, depending at least in part on the context, allow for the presence of other factors that are not necessarily expressly described.

[0036] It will be understood that the meanings of "on", "above", and "over" in this disclosure should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0037] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the figures. Spatial relative terms are intended to encompass different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented, and the spatial relative descriptors used herein may be interpreted accordingly.

[0038] In this embodiment, as Figures 1-6As shown in the figure, an embodiment of the present invention provides an internal fixation device for long bone fractures, including an overall component 100. The overall component 100 includes a connecting cylinder 110. A fixing component 200 is slidably connected to the inner wall of the connecting cylinder 110, and a connecting component 300 is slidably connected to the inner wall of the fixing component 200. The fixing component 200 includes a first circular shaft 210 slidably connected to the inner wall of the connecting cylinder 110. A first circular groove 211 is formed at the lower end of the surface of the first circular shaft 210. Two first connecting blocks 220 are fixedly connected to both sides of the top end of the first circular groove 211. One end of the two first connecting blocks 220 away from the first circular groove 211 is fixedly connected to a first fixing card shaft 230. A first moving circular plate 240 is attached to the bottom end of the first circular groove 211. Two rotating shafts 250 penetrating the first circular shaft 210 are rotatably connected to both sides inside the first moving circular plate 240. The connecting component 300 includes a movable shaft 310 movably arranged inside the first circular shaft 210. A threaded screw rod 320 is fixedly connected to the bottom end of the movable shaft 310. A second circular shaft 330 is rotatably connected to the surface of the threaded screw rod 320. A second circular groove 331 is formed on the surface of the second circular shaft 330. A second connecting block 340 is fixedly connected to the top end inner wall of the second circular groove 331. One end of the second connecting block 340 away from the second circular groove 331 is fixedly connected to a second fixing card shaft 350. A second moving circular plate 360 is attached to the bottom end inner wall of the second circular groove 331. A fixing plate 370 is fixedly connected to the bottom end of the second circular shaft 330. A sleeve shaft 380 is provided at the bottom end of the fixing plate 370. A spring 390 is sleeved on the surface of the sleeve shaft 380.

[0039] It should be further explained as follows: By pressing the first circular shaft 210 to descend, the first circular shaft 210 drives the second circular shaft 330 to descend through the threaded lead screw 320. The descent of the second circular shaft 330 drives the fixed plate 370 to squeeze the spring 390, causing the sleeve shaft 380 to move into the clearance groove 113. The descent of the first circular shaft 210 and the second circular shaft 330 drives the first connecting block 220 and the second connecting block 340 to move, causing the first fixed clamping shaft 230 to contract into the first groove 111 through the first connecting rod 221, and the second fixed clamping shaft 350 to contract into the second groove 112 through the second connecting rod 341. Then, insert the connecting cylinder 110 into the bone to be connected. Through the connecting cylinder 110, the fractured bone can be effectively fixed initially. At this time, release the first circular shaft 210. Under the reaction force of the spring 390, the first fixed clamping shaft 230 and the second fixed clamping shaft 350 expand. Then, rotate the two groups of rotating shafts 250, causing the rotating shafts 250 to drive the first moving circular plate 240 and the second moving circular plate 360 to rise. When they fit against the first connecting block 220 and the second connecting block 340, they drive them to rise synchronously, enabling the first fixed clamping shaft 230 and the second fixed clamping shaft 350 to be embedded in the holes reserved in the bone, further strengthening the fixing effect between the fractured bones. Then, rotate the movable shaft 310, driving the threaded lead screw 320 to rotate. The threaded lead screw 320 drives the second circular shaft 330 to move. The second fixed clamping shaft 350 on the second circular shaft 330 is fixed in the fractured bone. Through the movement of the second circular shaft 330, the two fractured bones can be effectively made to fit together, and at the same time, the connection effect at the fracture is effectively enhanced, improving the healing speed after fracture.

[0040] In this embodiment, as Figure 1 、 Figure 3 and Figure 4 shown, on both sides of the upper end surface of the connecting cylinder 110, there are first grooves 111 that fit the first fixed clamping shaft 230, and on both sides of the lower end surface of the connecting cylinder 110, there are second grooves 112 that fit the second fixed clamping shaft 350. The length of the second groove 112 is greater than the length of the first groove 111. At the bottom end of the inner wall of the connecting cylinder 110, there is a clearance groove 113 that fits the sleeve shaft 380.

[0041] It should be further explained as follows: By making the length of the second groove 112 greater than the length of the first groove 111, there is sufficient space for the second fixed clamping shaft 350 to move.

[0042] In this embodiment, as Figure 5 and Figure 6As shown, a clearance groove 113 for fitting the sleeve shaft 380 is provided at the bottom end of the inner wall of the connecting cylinder 110. A knob 251 is installed at the top end of the rotating shaft 250, and the rotating shaft 250 passes through the second circular shaft 330 and is rotatably connected to the second moving circular plate 360. The first fixed clamping shaft 230 and the second fixed clamping shaft 350 are inverted conical. On both sides of the top end of the first circular groove 211, there are first connecting blocks 220. At the top end of the inner wall of the second circular groove 331, there is a second connecting block 340. A second connecting rod 341 is rotatably connected inside the second connecting block 340, and both ends of the second connecting rod 341 are fixedly connected to the inner wall of the connecting cylinder 110. The lower end surface of the connecting cylinder 110 is conical. The fixing plate 370 is slidably connected to the connecting cylinder 110. In the closed state, the first fixed clamping shaft 230 and the second fixed clamping shaft 350 are in close fit with the connecting cylinder 110, and the opening angle of the first fixed clamping shaft 230 and the second fixed clamping shaft 350 in the open state is 30 degrees.

[0043] It should be further explained that by setting the first fixed clamping shaft 230 and the second fixed clamping shaft 350 to be inverted conical, the firmness with the bone can be enhanced, preventing it from shifting during rehabilitation. At the same time, setting the opening state of the first fixed clamping shaft 230 and the second fixed clamping shaft 350 to 30 degrees can further strengthen the stability effect.

[0044] In this embodiment, as Figure 2 and Figure 4 shown, the first moving circular plate 240 is slidably connected to the first circular shaft 210, the second moving circular plate 360 is slidably connected to the second circular shaft 330. The top end of the spring 390 is in contact with the bottom end of the fixing plate 370, and the bottom end of the spring 390 is fixedly connected to the bottom end of the inner wall of the connecting cylinder 110. The sleeve shaft 380 is slidably connected to the spring 390.

[0045] It should be further explained that the connecting cylinder 110 can play the role of moving calibration and preliminary fixation for the fractured bone, facilitating the next operation of the staff.

[0046] The technical solution provided by the present invention is as follows: by pressing the first round shaft to descend, the first round shaft drives the second round shaft to descend through the threaded lead screw. The descent of the second round shaft drives the fixed plate to squeeze the spring, causing the sleeve shaft to move into the clearance groove. The descent of the first round shaft and the second round shaft drives the first connecting block and the second connecting block to move, causing the first fixed clamping shaft to contract into the first groove through the first connecting rod, and the second fixed clamping shaft to contract into the second groove through the second connecting rod. Then, the connecting cylinder is inserted into the bone to be connected, and the connecting cylinder can effectively preliminarily fix the fractured bone. At this time, the first round shaft is released, and under the reaction force of the spring, the first fixed clamping shaft and the second fixed clamping shaft are unfolded. Then, the two rotating shafts are rotated, and the rotating shafts drive the first moving circular plate and the second moving circular plate to rise. When they fit against the first connecting block and the second connecting block, they drive them to rise synchronously, enabling the first fixed clamping shaft and the second fixed clamping shaft to be embedded in the holes reserved in the bone, further strengthening the fixing effect between the fractured bones. Then, the movable shaft is rotated to drive the threaded lead screw to rotate, and the threaded lead screw drives the second round shaft to move. The second fixed clamping shaft on the second round shaft is fixed in the fractured bone. Through the movement of the second round shaft, the two fractured bones can be effectively fitted together, and at the same time, the connection effect at the fracture is effectively enhanced, and the healing speed after fracture is increased.

[0047] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the essence and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. Additionally, to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0048] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An internal fixation device for long bone fractures, characterized in that: It comprises an integral component, the integral component comprises a connecting cylinder, the inner wall of the connecting cylinder is slidably connected with a fixing component, and the inner wall of the fixing component is slidably connected with a connecting component; The fixing assembly comprises a first circular shaft slidably connected to an inner wall of the connecting cylinder, and a first circular groove is provided on the surface of the first circular shaft, and the first connecting block is fixedly connected to the first connecting block at both ends of the top of the first circular groove, and the first fixed clamping shaft is fixedly connected to the two sets of first connecting blocks at one end away from the first circular groove, and the bottom of the first circular groove is affixed to the first movable circular plate, and the first movable circular plate is rotatably connected to the rotating shaft that runs through the first circular shaft at both sides inside the first movable circular plate, and the connecting assembly comprises a movable shaft slidably connected to the inside of the first circular shaft, the bottom of the movable shaft is fixedly connected to a threaded screw rod, and the surface of the threaded screw rod is rotatably connected to the second circular shaft, and the surface of the second circular shaft is provided with a second circular groove, the top end of the inner wall of the second circular groove is fixedly connected to a second connecting block, and the end of the second connecting block away from the second circular groove is fixedly connected to the second fixed clamping shaft, and the bottom end of the inner wall of the second circular groove is affixed to the second movable circular plate, and the bottom end of the second circular shaft is fixedly connected to the fixing plate, and the bottom end of the fixing plate is provided with a sleeve shaft, and the surface of the sleeve shaft is sleeved with a spring.

2. The internal fixation device for long bone fracture according to claim 1, characterized in that: The upper end of the connecting tube surface is provided with first grooves that match the first fixed clamping shaft on both sides, and the lower end of the connecting tube surface is provided with second grooves that match the second fixed clamping shaft on both sides, and the length of the second groove is greater than that of the first groove.

3. The internal fixation device for long bone fracture according to claim 1, characterized in that: The bottom end of the inner wall of the connecting tube is provided with a space-avoiding groove for fitting the sleeve shaft.

4. The internal fixation device for long bone fracture according to claim 1, characterized in that: A knob is installed at the top end of the rotating shaft, and the rotating shaft passes through the second circular shaft and is rotatably connected with the second movable circular plate.

5. The internal fixation device for long bone fracture according to claim 1, characterized in that: The first fixed clamping shaft and the second fixed clamping shaft are in an inverted cone shape.

6. The internal fixation device for long bone fracture according to claim 1, characterized in that: First connecting blocks are arranged on both sides of the top of the first circular groove, a second connecting block is arranged on the top of the inner wall of the second circular groove, a second connecting rod is rotatably connected in the second connecting block, and both ends of the second connecting rod are fixedly connected to the inner wall of the connecting cylinder.

7. The internal fixation device for long bone fracture according to claim 1, characterized in that: The first movable circular plate is slidably connected to the first circular shaft, and the second movable circular plate is slidably connected to the second circular shaft.

8. The internal fixation device for long bone fracture according to claim 1, characterized in that: The top end of the spring is fitted to the bottom end of the fixing plate, and the bottom end of the spring is fixedly connected to the bottom end of the inner wall of the connecting tube, and the sleeve shaft is slidably connected to the spring.

9. The internal fixation device for long bone fracture according to claim 1, characterized in that: The lower end of the surface of the connecting cylinder is conical, and the fixing plate is slidably connected to the connecting cylinder.

10. The internal fixation device for long bone fracture according to claim 1, characterized in that: The first fixed clamping shaft and the second fixed clamping shaft are tightly fitted with the connecting tube in the closed state, and the angle of the first fixed clamping shaft and the second fixed clamping shaft in the open state is thirty degrees.

Images