Internal fixation device for long bone fracture

Abstract

The application provides a long bone fracture internal fixation device and belongs to the technical field of intramedullary fixation. The device comprises a whole assembly, and the whole assembly comprises a connecting cylinder. The first fixed clamping shaft and the second fixed clamping shaft are shrunk to the connecting cylinder by pressing the first circular shaft to descend, then the connecting cylinder is inserted into the bone to be connected, the broken bone can be effectively preliminarily fixed through the connecting cylinder, the first circular shaft is loosened, the first fixed clamping shaft and the second fixed clamping shaft are expanded under the reaction force of the spring, the first moving circular plate and the second moving circular plate are lifted by rotating the shaft, the first fixed clamping shaft and the second fixed clamping shaft can be embedded in the reserved hole in the bone, the fixing effect between the broken bones is further strengthened, the two broken bones can be effectively matched by moving the second circular shaft, the connecting effect of the broken part is effectively enhanced, and the healing speed after the fracture is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intramedullary fixation, in particular to an internal fixation device for long bone fracture. BACKGROUND

[0002] With the aggravation of population aging, the population of the elderly is increasing, and the elderly often have osteoporosis problems. The reaction ability of the elderly decreases, and the hip muscle protection is poor. Under the action of external force, fracture is prone to occur. Relevant documents report that the proportion of intertrochanteric fracture of femur accounts for as high as 50% of hip fracture. Due to the structural characteristics of the place, surgical treatment is currently recognized as the best treatment.

[0003] The main means for treating fracture in orthopedics is internal fixation, which is mainly metal bone plate. The bone plate is provided with a spherical compression hole, a locking threaded hole or a combination of a dynamic compression and a locking threaded hole. Different forms of bone screws are used to fix the fracture site, so as to achieve the purpose of treating bone fracture and disease. Among them: dynamic compression bone plate, the placement of compression screw completes the axial compression of the fracture area to form a strong internal fixation. Such products do not form bone callus during fracture healing, which may cause infection, nonunion and delayed fracture healing; locking bone plate, the bone plate is provided with a locking threaded hole, the threaded hole is a double thread structure, and a relatively stable bridging internal fixation is formed by a locking screw, which can produce secondary bone healing with bone callus.

[0004] The existing patent (publication number: CN115105180U) is a femoral intramedullary fixation device. The device can improve the early fixation effect of the femoral intramedullary fixation device, reduce the probability of rotation and movement of the tension screw in the femoral neck, and non-parallelly arrange the tension screw and the stable screw to effectively prevent the proximal femur from turning inward and other adverse effects.

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

[0006] The device fixes the bone by twisting a plurality of screws. However, if the screws are twisted too tightly, the pressure on the bone may increase, causing bone fracture. If the screws are twisted too loosely, the internal fixation effect may not be stable when the bone is fixed. SUMMARY

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

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

[0009] The utility model provides an internal fixation device for long bone fracture, including integral assembly, the integral assembly includes connecting cylinder, fixed assembly is connected with the inner wall of connecting cylinder slidingly, and connecting assembly is connected with the inner wall of fixed assembly slidingly, the fixed assembly includes the first round axle of sliding connection in the inner wall of connecting cylinder, the first round groove is established to the surface lower end of first round axle, and the both sides of the top of first round groove are fixedly connected with first connecting block, and the both ends of two groups first connecting block are fixedly connected with first fixed clamping shaft away from first round groove, the first moving round plate is pasted to the bottom of first round groove, and the both sides of first moving round plate inside are rotatably connected with the rotating shaft that penetrates first round axle, the connecting assembly includes movable axle that is slidingly connected in the inside of first round axle, the screw rod is fixedly connected with the bottom of movable axle, the second round axle is rotatably connected with the surface of screw rod, the second round groove is established to the surface of second round axle, and the inner wall top of second round groove is fixedly connected with second connecting block, and the both ends of second connecting block are fixedly connected with second fixed clamping shaft away from second round groove, and the second moving round plate is pasted to the bottom of second round groove, and the bottom of fixed plate is equipped with sleeve shaft, and the surface of sleeve shaft is equipped with spring.

[0010] Preferably, the connecting cylinder surface upper end both sides are provided with anastomosis first fixed clamping shaft first recess, and the connecting cylinder surface lower end both sides are provided with anastomosis second fixed clamping shaft's second recess, and the length of second recess is greater than the length of first recess.

[0011] Preferably, the connecting cylinder inner wall bottom is provided with the avoidance groove that anastomosis sleeve shaft.

[0012] Preferably, the rotating shaft top is equipped with knob, and rotating shaft penetrates and is rotatably connected with second round axle and second moving round plate.

[0013] Preferably, the first fixed clamping shaft and second fixed clamping shaft are inverted conical.

[0014] Preferably, the both sides of the top of first round groove are provided with first connecting block, the inner wall top of second round groove is provided with second connecting block, the second connecting rod is rotatably connected in second connecting block, and the both ends of second connecting rod are fixedly connected to the inner wall of connecting cylinder.

[0015] Preferably, the first moving round plate is slidingly connected with first round axle, and the second moving round plate is slidingly connected with second round axle.

[0016] Preferably, the spring top is pasted to the bottom of fixed plate, and the bottom of spring is fixedly connected to the inner wall bottom of connecting cylinder, and the sleeve shaft is slidingly connected with spring.

[0017] Preferably, the connecting cylinder surface lower end is conical, and the fixed plate is slidingly connected with connecting cylinder.

[0018] Preferably, the first and second fixed clamping shafts are closely fitted with the connecting cylinder in the closed state, and the angle of the first and second fixed clamping shafts in the open state is thirty degrees.

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

[0020] In the above scheme, the first fixed clamping shaft and the second fixed clamping shaft are contracted to the connecting cylinder by pressing the first circular shaft downward, and then the connecting cylinder is inserted into the bone to be connected, so that the broken bone can be effectively fixed initially. At this time, the first circular shaft is loosened, and the first fixed clamping shaft and the second fixed clamping shaft are expanded under the reaction force of the spring. Then, the two sets of rotating shafts are rotated to drive the first and second moving circular plates to rise, so that the first and second fixed clamping shafts can be embedded in the hole reserved in the bone, further enhancing the fixing effect between the broken bones. Then, the movable shaft is rotated to drive the second circular shaft to move, and the second fixed clamping shaft on the second circular shaft is fixed in the broken bone. Through the movement of the second circular shaft, the two broken bones can be effectively fitted together, and the connection effect at the broken part is effectively enhanced, improving the healing speed after the fracture. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute 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 a person skilled in the relevant art to implement and use the present disclosure.

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

[0023] Figure 2 It is a schematic diagram of the internal fixation device for long bone fracture;

[0024] Figure 3 It is a schematic diagram of the internal fixation device for long bone fracture;

[0025] Figure 4 It is a schematic diagram of the internal fixation device for long bone fracture;

[0026] Figure 5 It is a schematic diagram of the internal fixation device for long bone fracture;

[0027] Figure 6 It is a schematic diagram of the internal fixation device for long bone fracture Figure 5 It is a schematic diagram of the internal fixation device for long bone fracture

[0028] [Reference signs]

[0029] 100. Overall component; 110. Connecting cylinder; 111. First groove; 112. Second groove; 113. Clearance groove;

[0030] 200, Fixing component; 210, First circular shaft; 211, First circular groove; 220, First connecting block; 221, First connecting rod; 230, First fixing pin; 240, First moving circular plate; 250, Rotating shaft; 251, Knob;

[0031] 300. Connecting assembly; 310. Movable shaft; 320. Threaded screw; 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] like Figures 1-6 As shown, specific structures and devices are marked in the figures to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0033] The internal fixation device for long bone fractures provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, 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 the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0035] In general, the terminology can be understood at least in part from a context of a use of the language within a description. For example, the term“one or more” as used herein, depending at least in part upon a context of a usage, can be used to describe any feature, structure, or characteristic in a singular sense or can be used to describe combinations of features, structures or characteristics in a plural sense. Additionally, the term“based on” can be understood as not necessarily intended to convey an exclusive set of factors, but rather can, at least

[0036] It will be understood that the terms“on,”“over,” and“above,” in the disclosure, should be interpreted in the broadest context possible 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“over” or“above” not only means the meaning of being“over” or“above” something but also can include the meaning of being“over” or“above” something with no intervening features or layers therebetween.

[0037] In addition, spatially relative terms, such as“beneath,”“below,”“lower,”“above,”“upper” and the like, can be used herein for ease of description to describe one element or feature’s relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0038] In the present embodiment, as Figures 1-6As shown, the embodiment of the present application provides a long bone fracture internal fixation device, comprising a whole assembly 100, the whole assembly 100 comprises a connecting barrel 110, the inner wall of the connecting barrel 110 is slidably connected with a fixing assembly 200, and the inner wall of the fixing assembly 200 is slidably connected with a connecting assembly 300; the fixing assembly 200 comprises a first circular shaft 210 slidably connected with the inner wall of the connecting barrel 110, a first circular groove 211 is formed in the surface of the first circular shaft 210, the top end of the first circular groove 211 is fixedly connected with a first connecting block 220 on both sides, the end of the two groups of first connecting blocks 220 away from the first circular groove 211 is fixedly connected with a first fixed clamping shaft 230, the bottom end of the first circular groove 211 is attached with a first movable circular plate 240, the inside of the first movable circular plate 240 is rotatably connected with a rotating shaft 250 penetrating through the first circular shaft 210, the connecting assembly 300 comprises a movable shaft 310 movably arranged in the inside of the first circular shaft 210, the bottom end of the movable shaft 310 is fixedly connected with a threaded screw rod 320, the surface of the threaded screw rod 320 is rotatably connected with a second circular shaft 330, the surface of the second circular shaft 330 is provided with a second circular groove 331, the inner wall of the second circular groove 331 is fixedly connected with a second connecting block 340 on the top end, the end of the second connecting block 340 away from the second circular groove 331 is fixedly connected with a second fixed clamping shaft 350, the bottom end of the inner wall of the second circular groove 331 is attached with a second movable circular plate 360, the bottom end of the second circular shaft 330 is fixedly connected with a fixed plate 370, the bottom end of the fixed plate 370 is provided with a sleeve shaft 380, and the surface of the sleeve shaft 380 is sleeved with a spring 390.

[0039] Further, the first circular shaft 210 is lowered by pressing, the first circular shaft 210 drives the second circular shaft 330 to be lowered through the threaded screw rod 320, the second circular shaft 330 drives the fixed plate 370 to extrude the spring 390, so that the sleeve shaft 380 moves into the empty slot 113, the first circular shaft 210 and the second circular shaft 330 drive the first connecting block 220 and the second connecting block 340 to move, so that the first fixed clamping shaft 230 is retracted into the first groove 111 through the first connecting rod 221, and the second fixed clamping shaft 350 is retracted into the second groove 112 through the second connecting rod 341, then the connecting barrel 110 is inserted into the bone to be connected, the connecting barrel 110 can effectively fix the fractured bone, at this time, the first circular shaft 210 is loosened, the first fixed clamping shaft 230 and the second fixed clamping shaft 350 are expanded under the reaction force of the spring 390, then the two groups of rotating shafts 250 are rotated, the rotating shafts 250 drive the first moving circular plate 240 and the second moving circular plate 360 to rise, when the first moving circular plate 240 and the second moving circular plate 360 are attached to the first connecting block 220 and the second connecting block 340, the first connecting block 220 and the second connecting block 340 are driven to rise synchronously, so that the first fixed clamping shaft 230 and the second fixed clamping shaft 350 can be embedded in the hole reserved in the bone, and the fixing effect of the fractured bone is further enhanced, then the movable shaft 310 is rotated, the threaded screw rod 320 is driven to rotate, the second circular shaft 330 is driven to move, and 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 attached, and the connection effect of the fracture is effectively enhanced, and the healing speed after the fracture is improved.

[0040] In the embodiment, as shown in Figure 1 , Figure 3 and Figure 4 , the first groove 111 for accommodating the first fixed clamping shaft 230 is arranged on the upper end of the connecting barrel 110, the second groove 112 for accommodating the second fixed clamping shaft 350 is arranged on the lower end of the connecting barrel 110, the length of the second groove 112 is greater than that of the first groove 111, and the empty slot 113 for accommodating the sleeve shaft 380 is arranged on the inner wall of the connecting barrel 110.

[0041] Further, the length of the second groove 112 is greater than that of the first groove 111, so that the second fixed clamping shaft 350 has sufficient space when moving.

[0042] In the embodiment, as shown in Figure 5 and Figure 6As shown, the inner wall bottom end of the connecting cylinder 110 is provided with an empty slot 113 rotating shaft 250 top end is provided with a knob 251, and the rotating shaft 250 penetrates the second circular shaft 330 and the second moving circular plate 360 rotating connection, the first fixed clamping shaft 230 and the second fixed clamping shaft 350 are inverted conical, the top end of the first circular groove 211 is provided with a first connecting block 220, the inner wall top end of the second circular groove 331 is provided with a second connecting block 340, the second connecting block 340 is rotatably connected with a second connecting rod 341, the two ends of the second connecting rod 341 are fixedly connected to the inner wall of the connecting cylinder 110, the lower end of the surface of the connecting cylinder 110 is conical, the fixed plate 370 is slidably connected with the connecting cylinder 110, the first fixed clamping shaft 230 and the second fixed clamping shaft 350 are closed and tightly fitted with the connecting cylinder 110, and the angle of the first fixed clamping shaft 230 and the second fixed clamping shaft 350 in the open state is thirty 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, and the deviation during rehabilitation can be prevented, and at the same time, by setting the first fixed clamping shaft 230 and the second fixed clamping shaft 350 to be thirty degrees in the open state, the stability effect can be further enhanced.

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

[0045] It should be further explained that: by connecting the connecting cylinder 110, the fractured bone can be moved, calibrated and preliminarily fixed, so as to facilitate the next operation of the staff.

[0046] The technical scheme provided by the application, through pressing the first circular shaft to descend, the first circular shaft drives the second circular shaft to descend through the threaded screw rod, the second circular shaft descending drives the fixed plate to extrude the spring and moves the sleeve shaft into the air avoiding groove, the first circular shaft and the second circular shaft descending drive the first connecting block and the second connecting block to move, the first fixed clamping shaft is retracted into the first groove through the first connecting rod, the second fixed clamping shaft is retracted into the second groove through the second connecting rod, then the connecting barrel is inserted into the bone to be connected, the connecting barrel can effectively preliminarily fix the fractured bone, at this time, the first circular shaft is loosened, the first fixed clamping shaft and the second fixed clamping shaft are expanded under the reaction force of the spring, then the two groups of rotating shafts are rotated, the rotating shafts drive the first moving circular plate and the second moving circular plate to ascend, when the first connecting block and the second connecting block are attached, the first connecting block and the second connecting block are driven to ascend synchronously, the first fixed clamping shaft and the second fixed clamping shaft can be embedded in the reserved hole in the bone, the fixing effect of the fractured bone is further strengthened, then the movable shaft is rotated, the threaded screw rod is driven to rotate, the second circular shaft is driven to move, the second fixed clamping shaft on the second circular shaft is fixed in the fractured bone, through the movement of the second circular shaft, the two fractured bones can be effectively attached, and the connection effect of the fracture is effectively enhanced, the healing speed after the fracture is improved.

[0047] The present application encompasses any alternatives, modifications, equivalent methods and solutions made on the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0048] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can also be made, and these improvements and refinements should be regarded as the protection scope of the present application.

Claims

1. An internal fixation device for long bone fracture, characterized by comprising: Including whole assembly, the whole assembly includes connecting barrel, the connecting barrel inner wall is connected with fixed assembly, the fixed assembly inner wall is connected with connecting assembly; The fixed assembly includes a first circular shaft connected to the inner wall of the connecting barrel, 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 at the top end of the first circular groove, a first fixed clamping shaft is fixedly connected to the end of the first connecting block away from the first circular groove, a first movable circular plate is attached to the bottom end of the first circular groove, two rotating shafts are rotatably connected to the inside of the first movable circular plate, the connecting assembly includes a movable shaft connected to the inside of the first circular shaft, a threaded screw rod is fixedly connected to the bottom end of the movable shaft, a second circular shaft is rotatably connected to the surface of the threaded screw rod, a second circular groove is formed on the surface of the second circular shaft, a second connecting block is fixedly connected to the inner wall of the second circular groove, a second fixed clamping shaft is fixedly connected to the end of the second connecting block away from the second circular groove, a second movable circular plate is attached to the bottom end of the inner wall of the second circular groove, a fixed plate is fixedly connected to the bottom end of the second circular shaft, a sleeve shaft is provided at the bottom end of the fixed plate, and a spring is sleeved on the surface of the sleeve shaft. The first connecting block is provided at the top end of the first circular groove, the second connecting block is provided at the top end of the inner wall of the second circular groove, and the second connecting rod is rotatably connected in the second connecting block. The first movable circular plate is connected to the first circular shaft, and the second movable circular plate is connected to the second circular shaft. By pressing the first circular shaft down, the first circular shaft drives the second circular shaft down through the threaded screw rod, the second circular shaft drives the fixed plate to extrude the spring, the sleeve shaft moves into the empty groove, the first circular shaft and the second circular shaft drive the first connecting block and the second connecting block to move, the first fixed clamping shaft is retracted into the first groove through the first connecting rod, the second fixed clamping shaft is retracted into the second groove through the second connecting rod, the connecting barrel is inserted into the bone to be connected, the connecting barrel can effectively fix the broken bone, the first fixed clamping shaft and the second fixed clamping shaft are expanded under the action of the spring, the first movable circular plate and the second movable circular plate are raised by rotating the two rotating shafts, the first movable circular plate and the second movable circular plate are raised synchronously when they are attached to the first connecting block and the second connecting block, the first fixed clamping shaft and the second fixed clamping shaft can be embedded in the hole reserved in the bone, the fixing effect of the broken bone is further improved, the threaded screw rod is rotated by rotating the movable shaft, the second circular shaft is moved by the threaded screw rod, the second fixed clamping shaft on the second circular shaft is fixed in the broken bone, and the two broken bones can be effectively attached by moving the second circular shaft.

2. The internal fixation device for long bone fracture according to claim 1, wherein The connecting barrel surface upper end two sides are provided with first fixed clamping shaft first groove, and the connecting barrel surface lower end two sides are provided with second fixed clamping shaft second groove, and the length of the second groove is greater than the length of the first groove.

3. The internal fixation device for long bone fracture according to claim 1, wherein The connecting barrel inner wall bottom end is provided with an empty groove that matches the sleeve shaft.

4. The internal fixation device for long bone fracture according to claim 1, wherein The rotating shaft top is provided with a knob, and the rotating shaft penetrates the second circular shaft and is rotationally connected with the second moving circular plate.

5. The internal fixation device for long bone fracture according to claim 1, wherein The first and second fixed clamping shafts are reverse conical.

6. The internal fixation device for long bone fracture according to claim 1, wherein The spring top is attached to the bottom of the fixed plate, and the spring bottom is fixedly connected to the inner wall bottom of the connecting cylinder.

7. The internal fixation device for long bone fracture according to claim 1, wherein The surface lower end of the connecting cylinder is conical, and the fixed plate is slidingly connected with the connecting cylinder.

8. The internal fixation device for long bone fracture according to claim 1, wherein The first and second fixed clamping shafts are closely attached to the connecting cylinder in the closed state, and the angle of the first and second fixed clamping shafts in the open state is thirty degrees.

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