An enhanced internal fixation plate for lower limb fractures

Abstract

The present invention provides a lower limb fracture enhanced internal fixation plate, belonging to the field of medical technology. It includes a plate body, a drug-carrying member is arranged in the middle of the plate body, multiple groups of positioning members are arranged at both ends of the plate body, both ends of the plate body are respectively connected to the bone cortices at both ends of the fracture through the positioning members, and when the plate body is connected to the fracture surface, the drug-carrying member is located at the fracture connection; the positioning members all include a first bolt and a second bolt, and the first bolt, the second bolt and the plate body form a triangular locking structure. In the present invention, the first bolt and the second bolt are arranged to form an intersecting internal locking structure inside the bone, so as to enhance the connection between the plate body and the bone, and can effectively avoid the loosening of the first bolt and the second bolt. In addition, through the cooperation of the baffle, the guide rod and the drug delivery elastic member, the drug body can be administered according to the drug efficacy intensity stage, thereby improving the treatment effect of fracture healing.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and more particularly, to a reinforced internal fixation plate for lower limb fractures. Background Art

[0002] A fracture refers to a complete or partial break in the continuity of the bone structure. When the force exerted on the bone exceeds the maximum strength it can bear, a fracture occurs. Fractures can be classified into complete fractures and incomplete fractures. A complete fracture means that the bone is directly broken into two segments. Clinically, internal fixation plates are often used to treat complete fractures. The plate can effectively fix and connect the broken bones together, maintain the anatomical reduction of the fracture, and prevent the fracture ends from being sheared again or displaced due to movement. In addition, a firm internal fixation with a plate is beneficial to protecting the blood supply of the muscles and soft tissues at the fracture site, promoting primary healing of the fracture ends, and creating favorable conditions for fracture healing and repair.

[0003] Existing fixation plates are fixed using screws. The connection method is simple. After the patient's surgical activity, it is easy for the screws to be unevenly stressed, and then become loose, which may cause fracture displacement and affect bone healing. In addition, in order to improve the fracture healing effect, the fixation plate is provided with a drug-loading function. However, the current drug-loading function usually only has a single-release effect and cannot administer drugs stage by stage according to the treatment progress. Therefore, a reinforced internal fixation plate for lower limb fractures is proposed. Summary of the Invention

[0004] Aiming at the problems in the prior art that the fixation method of the plate is not firm and the drug-loading function of the plate only has single-dose administration and cannot administer drugs stage by stage according to the treatment progress, the purpose of the present invention is to provide a reinforced internal fixation plate for lower limb fractures.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A reinforced internal fixation plate for lower limb fractures, including a plate body. A drug-loading member is arranged in the middle of the plate body. A plurality of groups of positioning members are arranged at both ends of the plate body. The two ends of the plate body are respectively connected to the fracture bone surface through the positioning members. When the plate body is connected to the fracture, the drug-loading member is located at the fracture connection.

[0007] Each of the positioning members includes a first bolt and a second bolt. The first bolt, the second bolt, and the plate body form a triangular locking structure to strengthen the connection between the plate body and the bone surface.

[0008] The drug-loading member includes a plurality of groups of drug-loading holes opened on the surface of the plate body. The drug-loading holes penetrate up and down and are arranged along the fracture connection. Drug bodies are installed inside each of the drug-loading holes. The drug effects of the drug bodies increase in sequence according to the arrangement order, and the drug bodies can administer drugs gradually according to the drug effect intensity.

[0009] Optionally, the efficacy of the drug body increases sequentially from right to left. A chute is provided between two sets of drug-loading holes in the steel plate body. A baffle is fitted inside each chute. The baffle is in a U-shaped structure. Guide rods are fixedly connected to the closed ends of the baffles. One end of each guide rod penetrates into one set of drug-loading holes, and one end of the guide rod abuts against the surface of the drug body with lower efficacy. Both sides of the open end of the baffle penetrate into the other set of drug-loading holes, and the drug body with higher efficacy is located inside the baffle. Elastic dosing members are sleeved on the surfaces of the guide rods.

[0010] Optionally, degradable layers are fixedly installed at both the upper and lower ports of the drug-loading holes, and the drug body is located between the two degradable layers.

[0011] Optionally, the positioning member further includes a first mounting hole and a second mounting hole provided on the surface of the steel plate body. The first mounting hole is vertically arranged. The second mounting hole is inclined relative to the first mounting hole. The upper port of the first mounting hole is adapted to the head of the first bolt, and the lower port of the first mounting hole contracts and is adapted to the rod portion of the first bolt; the upper port of the second mounting hole is adapted to the head of the second bolt, and the lower port of the second mounting hole contracts and is adapted to the rod portion of the second bolt.

[0012] Optionally, a jack socket adapted to the second bolt is provided on the rod portion of the first bolt. The inner top of the first bolt is hollow, and a connecting bolt is inserted into the first bolt. The head of the connecting bolt is located in the hollow inner top of the first bolt. A positioning hole adapted to the connecting bolt is provided on the surface of the second bolt. A positioning mechanism is provided between the first bolt and the first mounting hole and between the second bolt and the second mounting hole. The positioning mechanism can align the jack socket with the installation direction of the second bolt and align the positioning hole with the installation direction of the connecting bolt.

[0013] Optionally, the positioning mechanism includes cylindrical grooves provided in the heads of the first bolt and the second bolt. Connecting plates are fitted inside the cylindrical grooves. Positioning rods are fixedly connected to the surfaces of the connecting plates. The moving directions of the cylindrical grooves, the connecting plates, and the positioning rods are all arranged along the radial direction of the first bolt or the second bolt. One end of the cylindrical groove is open, and the opening of the cylindrical groove contracts and is adapted to the positioning rod. Positioning elastic members are provided inside the cylindrical grooves. Positioning grooves adapted to the positioning rods are provided on the inner walls of the first mounting hole and the second mounting hole. A blocking mechanism is provided inside each cylindrical groove. When the blocking mechanism contacts the positioning rod, the blocking mechanism forms a movement interference on the positioning rod. When the blocking mechanism does not contact the positioning rod, the positioning elastic member can drive the positioning rod to move.

[0014] Optionally, the partition mechanism includes vertical grooves opened inside the first bolt and the second bolt. The vertical grooves are communicated with the positioning grooves. The lower ends of the vertical grooves are both open, and partition plates are arranged inside the vertical grooves. Through grooves adapted to the cylindrical grooves are opened on the surfaces of the partition plates. The partition plates can move up and down in the vertical grooves. In the initial state, the closed ends of the partition plates are located inside the cylindrical grooves.

[0015] Optionally, moving grooves are opened inside the first bolt and the second bolt. Vertical rods are fitted and installed inside the moving grooves. The lower ends of the vertical rods penetrate through the first bolt or the second bolt and are fixedly connected to a bottom plate. The lower ends of the partition plates are fixedly connected to the bottom plate. Connecting elastic members are sleeved on the surfaces of the vertical rods.

[0016] Optionally, reset mechanisms are arranged at the heads of the first bolt and the second bolt. The reset mechanisms can move the positioning rods out of the positioning grooves to facilitate the disassembly of the first bolt and the second bolt.

[0017] Optionally, the reset mechanisms both include a first installation groove and a second installation groove opened inside the first bolt and the second bolt, and the size of the second installation groove is smaller than that of the first installation groove. Reset plates adapted thereto are arranged inside the second installation grooves. Connecting ropes are fixedly connected between the reset plates and the positioning rods. Elastic support members are fixedly connected between the reset plates and the bottom surfaces of the second installation grooves.

[0018] The technical solution provided by the present invention has at least the following beneficial effects compared with the prior art:

[0019] In the above solution, by setting the baffle, the guide rod and the drug delivery elastic member in cooperation, when the drug body at the rightmost end has completed drug delivery, the guide rod in contact with the drug body moves to the right under the action of the drug delivery elastic member, thereby driving the baffle connected to the guide rod to move. The drug body located inside the baffle is thus placed in the body fluid, and the drug body can thus continue to deliver drugs. According to the above steps, the drug body can deliver drugs according to the efficacy intensity stage, thereby improving the treatment effect;

[0020] By inserting a hole in the surface of the first bolt, the second bolt can be screwed into the bone body and pass through the hole, and the first bolt and the second bolt are fixed by a connecting bolt, so that the first bolt and the second bolt form an intersecting internal locking structure inside the bone body, thereby enhancing the connection between the steel plate body and the bone body and effectively avoiding the situation of the first bolt and the second bolt falling off;

[0021] By providing a reset mechanism, when disassembling the first bolt and the second bolt, the disassembly tool is inserted into the interior of the second installation groove and presses against the reset plate. The reset plate moves downward, thereby driving the connecting rope to move, causing the connecting rope to pull the positioning rod out of the positioning groove. The positioning rod no longer restricts the first bolt or the second bolt, so that the first bolt or the second bolt can be disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is a cross-sectional view of the present invention;

[0025] Figure 3 is a cross-sectional view of the drug-carrying member of the present invention;

[0026] Figure 4 is a flowchart of drug delivery of the drug-carrying member of the present invention;

[0027] Figure 5 is a cross-sectional view of the first bolt of the present invention;

[0028] Figure 6 For the present invention Figure 5 is a schematic diagram of a partial structure in;

[0029] Figure 7 is a schematic diagram of the structure of the present invention when the partition mechanism blocks the positioning rod;

[0030] Figure 8 is a schematic diagram of the structure of the present invention when the reset mechanism acts on the positioning rod;

[0031] Figure 9 For the present invention Figure 6 is an enlarged view of part A in;

[0032] Figure 10 For the present invention Figure 6 is an enlarged view of part B in;

[0033] Figure 11 For the present invention Figure 7 is an enlarged view of part C in.

[0034] [Reference Signs]

[0035] 1. Steel plate body;

[0036] 2. Positioning member; 21. First bolt; 22. Second bolt; 23. First mounting hole; 24. Second mounting hole; 25. Connecting bolt; 26. Jack; 27. Positioning hole;

[0037] 3. Drug-carrying member; 31. Drug-carrying hole; 32. Drug body; 33. Degradable layer; 34. Chute; 35. Guide rod; 36. Drug delivery elastic member; 37. Baffle;

[0038] 4. Positioning mechanism; 41. Positioning rod; 42. Connecting plate; 43. Cylindrical groove; 44. Positioning elastic member; 45. Positioning groove;

[0039] 5. Partitioning mechanism; 51. Vertical groove; 52. Partition; 53. Through groove; 54. Vertical rod; 55. Moving groove; 56. Connecting elastic member; 57. Bottom plate;

[0040] 6. Reset mechanism; 61. First mounting groove; 62. Second mounting groove; 63. Reset plate; 64. Connecting rope; 65. Elastic support member.

[0041] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed Embodiment

[0042] The following describes in detail a lower limb fracture enhanced internal fixation plate 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; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0043] It should be noted that in the specification, when referring to "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc., it indicates that the described embodiment may include specific features, structures or characteristics, but not every embodiment necessarily includes the specific feature, structure or characteristic. Additionally, when combining an embodiment to describe a specific feature, structure or characteristic, implementing such feature, structure or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0044] 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 property in the singular sense, or can be used to describe a combination of features, structures, or properties in the plural sense. Additionally, the term "based on" can be understood as not necessarily 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 explicitly described.

[0045] It can be understood that the meanings of "on", "above", and "over" in the present invention should be interpreted 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 can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0046] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. can be 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 accompanying drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive words used herein can be correspondingly interpreted similarly.

[0047] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a lower limb fracture enhanced internal fixation plate, including a plate body 1. A medicine-carrying member 3 is arranged in the middle of the plate body 1. A plurality of groups of positioning members 2 are arranged at both ends of the plate body 1. The two ends of the plate body 1 are respectively connected to the fracture bone surface through the positioning members 2. When the plate body 1 is connected to the fracture, the medicine-carrying member 3 is located at the fracture connection. The positioning members 2 each include a first bolt 21 and a second bolt 22. The first bolt 21, the second bolt 22, and the plate body 1 form a triangular locking structure to strengthen the connection between the plate body 1 and the bone surface.

[0048] As Figures 3 to 4 shown, the medicine-carrying member 3 includes a plurality of groups of medicine-carrying holes 31 opened on the surface of the plate body 1. The medicine-carrying holes 31 penetrate through up and down and are arranged along the fracture connection. Medicine bodies 32 are installed inside the medicine-carrying holes 31, and the medicinal effects of the medicine bodies 32 increase in sequence according to the arrangement order, and the medicine bodies 32 can gradually administer medicine according to the medicinal effect intensity.

[0049] The drug efficacy of the drug body 32 increases sequentially from right to left. A chute 34 is provided between two groups of drug loading holes 31 in the steel plate body 1. A baffle 37 is installed in cooperation with the inside of each chute 34. The baffle 37 is arranged in a U-shaped structure. The closed ends of the baffle 37 are fixedly connected with guide rods 35. One end of the guide rod 35 penetrates into one group of drug loading holes 31, and one end of the guide rod 35 abuts against the surface of the drug body 32 with low efficacy. Both sides of the open end of the baffle 37 penetrate into the other group of drug loading holes 31, and the drug body 32 with high efficacy is located inside the baffle 37. A drug delivery elastic member 36 is sleeved on the surface of each guide rod 35.

[0050] Degradable layers 33 are fixedly installed at both the upper port and the lower port of the drug loading hole 31, and the drug body 32 is located between the two degradable layers 33. By providing the degradable layers 33, the drug body 32 can be protected to prevent the drug body 32 from oxidizing.

[0051] In this embodiment, by providing the cooperation of the baffle 37, the guide rod 35 and the drug delivery elastic member 36, when the drug delivery of the rightmost drug body 32 is completed, the guide rod 35 in contact with the drug body 32 moves to the right under the action of the drug delivery elastic member 36, thereby driving the baffle 37 connected to the guide rod 35 to move. The drug body 32 located inside the baffle 37 is thus placed in the body fluid, and the drug body 32 can thus continue to deliver drugs. According to the above steps, the drug body 32 can deliver drugs in stages according to the drug efficacy intensity, thereby improving the treatment effect.

[0052] As Figures 5 to 6 shown, the positioning member 2 further includes a first mounting hole 23 and a second mounting hole 24 opened on the surface of the steel plate body 1. The first mounting hole 23 is vertically arranged, the second mounting hole 24 is inclined relative to the first mounting hole 23, and the upper port of the first mounting hole 23 is adapted to the head of the first bolt 21, and the lower port of the first mounting hole 23 contracts and is adapted to the rod portion of the first bolt 21; the upper port of the second mounting hole 24 is adapted to the head of the second bolt 22, and the lower port of the second mounting hole 24 contracts and is adapted to the rod portion of the second bolt 22.

[0053] In this embodiment, the first mounting hole 23 and the second mounting hole 24 respectively provide guiding functions for the first bolt 21 and the second bolt 22, so that the first bolt 21 and the second bolt 22 are screwed into the bone body in a fixed direction.

[0054] As Figure 5As shown, a jacking hole 26 adapted to the second bolt 22 is provided in the rod portion of the first bolt 21. The inner top of the first bolt 21 is hollow, and a connecting bolt 25 is inserted into the first bolt 21. The head of the connecting bolt 25 is located in the hollow part at the inner top of the first bolt 21. A positioning hole 27 adapted to the connecting bolt 25 is provided on the surface of the second bolt 22. A positioning mechanism 4 is provided between the first bolt 21 and the first mounting hole 23 and between the second bolt 22 and the second mounting hole 24. The positioning mechanism 4 can align the jacking hole 26 with the installation direction of the second bolt 22 and align the positioning hole 27 with the installation direction of the connecting bolt 25.

[0055] In this embodiment, by jacking the hole 26 on the surface of the first bolt 21, the second bolt 22 can be screwed into the bone body and pass through the jacking hole 26, and the first bolt 21 and the second bolt 22 are fixed by the connecting bolt 25, so that the first bolt 21 and the second bolt 22 form an intersecting internal locking structure inside the bone body, thereby enhancing the connection between the steel plate body 1 and the bone body, and effectively avoiding the situation of the first bolt 21 and the second bolt 22 falling off.

[0056] As Figures 5 to 7 , Figures 9 to 11 As shown, the positioning mechanism 4 includes cylindrical grooves 43 opened in the heads of the first bolt 21 and the second bolt 22. Connecting plates 42 are fitted and installed inside the cylindrical grooves 43. Positioning rods 41 are fixedly connected to the surfaces of the connecting plates 42. The moving directions of the cylindrical grooves 43, the connecting plates 42, and the positioning rods 41 are all arranged along the radial direction of the first bolt 21 or the second bolt 22. One end of the cylindrical groove 43 is open, and the opening of the cylindrical groove 43 shrinks and is adapted to the positioning rod 41. Positioning elastic members 44 are provided inside the cylindrical grooves 43. Positioning grooves 45 adapted to the positioning rods 41 are opened on the inner walls of the first mounting hole 23 and the second mounting hole 24. Partition mechanisms 5 are provided inside the cylindrical grooves 43. When the partition mechanisms 5 contact the positioning rods 41, the partition mechanisms 5 form a moving interference on the positioning rods 41. When the partition mechanisms 5 do not contact the positioning rods 41, the positioning elastic members 44 can drive the positioning rods 41 to move.

[0057] The partition mechanism 5 includes vertical grooves 51 opened in the first bolt 21 and the second bolt 22. The vertical grooves 51 are communicated with the positioning grooves 45. The lower ends of the vertical grooves 51 are all open, and partition plates 52 are provided inside the vertical grooves 51. Through grooves 53 adapted to the cylindrical grooves 43 are opened on the surfaces of the partition plates 52. The partition plates 52 can move up and down in the vertical grooves 51. In the initial state, the closed ends of the partition plates 52 are located inside the cylindrical grooves 43.

[0058] A moving groove 55 is formed inside each of the first bolt 21 and the second bolt 22. A vertical rod 54 is fitted inside each of the moving grooves 55. The lower end of the vertical rod 54 penetrates through the first bolt 21 or the second bolt 22 and is fixedly connected to a bottom plate 57. The lower end of the partition plate 52 is fixedly connected to the bottom plate 57. Connecting elastic members 56 are sleeved on the surfaces of the vertical rods 54.

[0059] In this embodiment, by setting the positioning mechanism 4 and the partition mechanism 5 to cooperate with each other, when installing the first bolt 21 and the second bolt 22, the jack 26 and the positioning hole 27 can be automatically positioned, so that the jack 26 is aligned with the installation direction of the second bolt 22, and the positioning hole 27 is aligned with the installation direction of the connecting bolt 25. Specifically, when the head of the first bolt 21 is screwed into the first installation hole 23 or the head of the second bolt 22 is screwed into the second installation hole 24, the partition mechanism 5 first contacts the inner wall of the first installation hole 23 or the second installation hole 24. As the first bolt 21 and the second bolt 22 continue to feed, the bottom plate 57 will stop moving due to the blocking effect of the bottom of the first installation hole 23 or the second installation hole 24. Therefore, the bottom plate 57 and the partition plate 52 can move relative to the first bolt 21 or the second bolt 22. The partition plate 52 moves upward relative to the vertical groove 51. When the through groove 53 on the partition plate 52 moves to align with the cylindrical groove 43, the partition plate 52 no longer forms a moving interference on the positioning rod 41. Under the action of the positioning elastic member 44, one end of the positioning rod 41 can abut against the inner surface of the first installation hole 23 or the second installation hole 24 through the through groove 53. When the head of the first bolt 21 is completely installed inside the first installation hole 23 or the head of the second bolt 22 is completely installed inside the second installation hole 24, the height of the positioning rod 41 is the same as the height of the positioning groove 45. At this time, the first bolt 21 or the second bolt 22 can be rotated again. When the positioning rod 41 rotates to align with the positioning groove 45, the positioning elastic member 44 can push the positioning rod 41 into the positioning groove 45, thereby positioning the first bolt 21 or the second bolt 22, that is, the jack 26 and the positioning hole 27 can be positioned.

[0060] As Figures 6 to 8 shown, a reset mechanism 6 is provided at the head of each of the first bolt 21 and the second bolt 22. The reset mechanism 6 can move the positioning rod 41 out of the positioning groove 45 to facilitate the disassembly of the first bolt 21 and the second bolt 22.

[0061] The reset mechanism 6 includes a first installation groove 61 and a second installation groove 62 formed inside the first bolt 21 and the second bolt 22 respectively. The size of the second installation groove 62 is smaller than that of the first installation groove 61. A reset plate 63 adapted to the second installation groove 62 is provided inside each of the second installation grooves 62. A connecting rope 64 is fixedly connected between the reset plate 63 and the positioning rod 41. An elastic support member 65 is fixedly connected between the reset plate 63 and the bottom surface of the second installation groove 62.

[0062] In this embodiment, by providing a reset mechanism 6, when removing the first bolt 21 and the second bolt 22, the positioning rod 41 can be moved out of the positioning groove 45. Specifically, the first installation groove 61 and the second installation groove 62 are provided for installation and removal respectively. The shapes of the first installation groove 61 and the second installation groove 62 are both set as regular hexagons. When installing and removing, installation and removal tools respectively adapted to the first installation groove 61 and the second installation groove 62 need to be equipped. When removing the first bolt 21 and the second bolt 22, the removal tool is inserted into the second installation groove 62 and presses the reset plate 63. The reset plate 63 moves downward, driving the connecting rope 64 to move, so that the connecting rope 64 pulls the positioning rod 41 out of the positioning groove 45. The positioning rod 41 no longer restricts the first bolt 21 or the second bolt 22, and thus the first bolt 21 or the second bolt 22 can be removed.

[0063] The working process of the technical solution of the present invention is as follows:

[0064] When in use, first, when installing the first bolt 21 and the second bolt 22, the jack 26 and the positioning hole 27 can be automatically positioned, so that the jack 26 is aligned with the installation direction of the second bolt 22, and the positioning hole 27 is aligned with the installation direction of the connecting bolt 25. Specifically, when the head of the first bolt 21 is screwed into the first installation hole 23 or the head of the second bolt 22 is screwed into the second installation hole 24, the blocking mechanism 5 first contacts the inner wall of the first installation hole 23 or the second installation hole 24. As the first bolt 21 and the second bolt 22 continue to feed, the bottom plate 57 is blocked by the bottom of the first installation hole 23 or the second installation hole 24 and stops moving. Therefore, the bottom plate 57 and the partition plate 52 can move relative to the first bolt 21 or the second bolt 22. The partition plate 52 moves upward relative to the vertical groove 51. When the through groove 53 on the partition plate 52 moves to align with the cylindrical groove 43, the partition plate 52 no longer forms a moving interference with the positioning rod 41. Under the action of the positioning elastic member 44, one end of the positioning rod 41 can abut against the inner surface of the first installation hole 23 or the second installation hole 24 through the through groove 53. When the head of the first bolt 21 is completely installed in the first installation hole 23 or the head of the second bolt 22 is completely installed in the second installation hole 24, the height of the positioning rod 41 is the same as the height of the positioning groove 45. At this time, the first bolt 21 or the second bolt 22 can be rotated again. When the positioning rod 41 rotates to align with the positioning groove 45, the positioning elastic member 44 can push the positioning rod 41 into the positioning groove 45, thereby positioning the first bolt 21 or the second bolt 22, that is, the jack 26 and the positioning hole 27 can be positioned.

[0065] By setting up the cooperation of the baffle 37, the guide rod 35 and the drug elastic member 36, when the drug body 32 at the rightmost end finishes drug administration, the guide rod 35 in contact with the drug body 32 moves to the right under the action of the drug elastic member 36, thereby driving the baffle 37 connected to the guide rod 35 to move. The drug body 32 located inside the baffle 37 is thus placed in the body fluid, and the drug body 32 can thus continue to administer drugs. According to the above steps, the drug body 32 can administer drugs according to the stages of drug efficacy intensity, thereby improving the treatment effect.

[0066] The present invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit and scope of the present invention. For 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. In addition, well-known methods, processes, procedures, components and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0067] 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. A lower limb fracture enhanced internal fixation plate, comprising a plate body, characterized in that, A drug-carrying member is provided in the middle of the steel plate body. A plurality of positioning members are provided at both ends of the steel plate body. The two ends of the steel plate body are respectively connected to the fracture bone surface through the positioning members. When the steel plate body is connected to the fracture, the drug-carrying member is located at the fracture connection. The positioning members each include a first bolt and a second bolt. The first bolt, the second bolt, and the steel plate body form a triangular locking structure to strengthen the connection between the steel plate body and the bone surface. The drug-carrying member includes a plurality of drug-carrying holes opened on the surface of the steel plate body. The drug-carrying holes penetrate up and down and are arranged along the fracture connection. A drug body is installed inside each drug-carrying hole. The efficacy of the drug bodies increases sequentially according to the arrangement order, and the drug bodies can gradually administer drugs according to the efficacy intensity. The efficacy of the drug bodies increases sequentially from right to left. A chute is opened between two groups of drug-carrying holes inside the steel plate body. A baffle is installed in cooperation with each chute. The baffle is set in a U-shaped structure. The closed ends of the baffle are fixedly connected with guide rods. One end of the guide rod penetrates into one of the drug-carrying holes, and one end of the guide rod abuts against the surface of the drug body with low efficacy. Both sides of the open end of the baffle penetrate into the other drug-carrying hole, and the drug body with high efficacy is located inside the baffle. A drug-administering elastic member is sleeved on the surface of each guide rod.

2. The enhanced internal fixation plate for lower limb fractures according to claim 1, characterized in that, Degradable layers are fixedly installed at both the upper port and the lower port of the drug-carrying hole, and the drug body is located between the two degradable layers.

3. The enhanced internal fixation plate for lower limb fractures according to claim 1, wherein, The positioning member further includes a first installation hole and a second installation hole opened on the surface of the steel plate body. The first installation hole is vertically arranged, and the second installation hole is inclined relative to the first installation hole. The upper port of the first installation hole is adapted to the head of the first bolt, and the lower port of the first installation hole contracts and is adapted to the rod portion of the first bolt; the upper port of the second installation hole is adapted to the head of the second bolt, and the lower port of the second installation hole contracts and is adapted to the rod portion of the second bolt.

4. The lower limb fracture enhanced internal fixation plate according to claim 3, wherein A jack adapted to the second bolt is opened on the rod portion of the first bolt. The inner top of the first bolt is hollow, and a connecting bolt is inserted into the first bolt. The head of the connecting bolt is located in the hollow part of the inner top of the first bolt. A positioning hole adapted to the connecting bolt is opened on the surface of the second bolt. A positioning mechanism is provided between the first bolt and the first installation hole and between the second bolt and the second installation hole. The positioning mechanism can align the jack with the installation direction of the second bolt and align the positioning hole with the installation direction of the connecting bolt.

5. The enhanced internal fixation plate for lower limb fractures according to claim 4, wherein The positioning mechanism includes cylindrical grooves formed in the heads of the first bolt and the second bolt. Connecting plates are fitted inside the cylindrical grooves. Positioning rods are fixedly connected to the surfaces of the connecting plates. The moving directions of the cylindrical grooves, the connecting plates, and the positioning rods are all arranged along the radial direction of the first bolt or the second bolt. One end of the cylindrical groove is open, and the opening of the cylindrical groove shrinks and is adapted to the positioning rod. Positioning elastic members are arranged inside the cylindrical grooves. Positioning grooves adapted to the positioning rods are formed in the inner walls of the first mounting hole and the second mounting hole. Partition mechanisms are arranged inside the cylindrical grooves. When the partition mechanism contacts the positioning rod, the partition mechanism forms a moving interference on the positioning rod. When the partition mechanism does not contact the positioning rod, the positioning elastic member can drive the positioning rod to move.

6. The lower limb fracture enhanced internal fixation plate according to claim 5, characterized in that, The partition mechanism includes vertical grooves formed in the first bolt and the second bolt. The vertical grooves are communicated with the positioning grooves. The lower ends of the vertical grooves are all open, and partition plates are arranged inside the vertical grooves. Through grooves adapted to the cylindrical grooves are formed on the surfaces of the partition plates. The partition plates can move up and down in the vertical grooves. In the initial state, the closed ends of the partition plates are located inside the cylindrical grooves.

7. The enhanced internal fixation plate for lower limb fractures according to claim 6, wherein Moving grooves are formed in the first bolt and the second bolt. Vertical rods are fitted inside the moving grooves. The lower ends of the vertical rods penetrate through the first bolt or the second bolt and are fixedly connected to the bottom plates. The lower ends of the partition plates are fixedly connected to the bottom plates. Connecting elastic members are sleeved on the surfaces of the vertical rods.

8. The lower limb fracture enhanced internal fixation plate according to claim 7, wherein, Reset mechanisms are arranged at the heads of the first bolt and the second bolt. The reset mechanisms can move the positioning rods out of the positioning grooves to facilitate the disassembly of the first bolt and the second bolt.

9. The enhanced internal fixation plate for lower limb fractures according to claim 8, wherein, The reset mechanisms each include a first mounting groove and a second mounting groove formed in the first bolt and the second bolt. The size of the second mounting groove is smaller than that of the first mounting groove. Reset plates adapted to each other are arranged inside the second mounting grooves. Connecting ropes are fixedly connected between the reset plates and the positioning rods. Elastic support members are fixedly connected between the reset plates and the bottom surfaces of the second mounting grooves.

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