Enhanced internal fixation steel plate for lower limb fracture

Abstract

The invention provides a lower limb fracture enhancing internal fixation steel plate, and belongs to the technical field of medical treatment. Comprising a steel plate body, a medicine carrying piece is arranged in the middle of the steel plate body, multiple sets of positioning pieces are arranged at the two ends of the steel plate body, the two ends of the steel plate body are connected with bone cortex at the two ends of a fracture through the positioning pieces respectively, and when the steel plate body is connected with a fracture surface, the medicine carrying piece is located at the fracture connecting position; each positioning piece comprises a first bolt and a second bolt, the first bolts, the second bolts and the steel plate body form a triangular locking structure, and the first bolts and the second bolts form a staggered inner locking structure in a bone, so that connection between the steel plate body and the bone is enhanced; in addition, through cooperation of a baffle, a guide rod and an administration elastic piece, the drug body can conduct administration according to the drug effect intensity stage, and therefore the treatment effect of fracture healing can be improved.

Description

Technical Field

[0001] The invention relates to the field of medical technology, and more particularly to a lower limb fracture enhanced internal fixation steel plate. Background Art

[0002] A fracture refers to a complete or partial break in the continuity of a bone structure. A fracture occurs when the force on a bone exceeds its maximum strength. Fractures can be divided into complete fractures and incomplete fractures. A complete fracture refers to a bone that is directly broken into two pieces. Internal fixation plates are often used clinically to treat complete fractures. The plates can effectively fix and connect the broken bones together, maintain the anatomical reduction of the fracture, and prevent the fracture ends from being displaced by shear force or movement. In addition, a firm internal fixation with a plate is beneficial to the protection of the blood supply to the muscles and soft tissues at the fracture ends, promotes primary healing of the fracture ends, and can create favorable conditions for fracture healing and repair.

[0003] The existing fixation plates are fixed with screws, and the connection method is simple. After the patient's surgical activities, the screws are easily unevenly stressed, which leads to loosening, which may cause fracture displacement and affect bone healing. In addition, in order to improve the fracture healing effect, the fixation plate will be provided with a drug loading function, but the current drug loading function usually only has a single release effect and cannot be administered in stages according to the progress of treatment. Therefore, an enhanced internal fixation plate for lower limb fractures is proposed. Summary of the invention

[0004] In view of the problems in the prior art that the fixing method of the steel plate is not firm, the drug-carrying function of the steel plate is only for single administration, and the drug cannot be administered in stages according to the progress of treatment, the purpose of the present invention is to provide an enhanced internal fixation steel plate for lower limb fractures.

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

[0006] A lower limb fracture enhanced internal fixation steel plate, comprising a steel plate body, a drug-carrying piece is arranged in the middle of the steel plate body, and multiple groups of positioning pieces are arranged at both ends of the steel plate body, and the two ends of the steel plate body are respectively connected to the fracture bone surface through the positioning pieces, and when the steel plate body is connected to the fracture, the drug-carrying piece is located at the fracture connection;

[0007] The positioning members each include a first bolt and a second bolt, and 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;

[0008] The drug-carrying part includes a plurality of drug-carrying holes opened on the surface of the steel plate body, the drug-carrying holes are connected vertically and arranged along the fracture connection, drug bodies are installed inside the drug-carrying holes, and the efficacy of the drug bodies is enhanced in sequence according to the arrangement order, and the drug bodies can be gradually administered according to the strength of the efficacy.

[0009] Optionally, the efficacy of the drug body increases from right to left, and a slide groove is provided in the steel plate body between the two groups of drug loading holes. A baffle is installed inside the slide groove, and the baffle is set to a U-shaped structure. The closed ends of the baffles are fixedly connected to guide rods, one end of the guide rod passes through one group of drug loading holes, and one end of the guide rod is against the surface of the drug body with low efficacy, and both sides of the open end of the baffle pass through the other group of drug loading holes, and the drug body with high efficacy is located inside the baffle, and the surface of the guide rod is sleeved with a drug delivery elastic member.

[0010] Optionally, the upper port and the lower port of the drug loading hole are both fixedly mounted with a degradable layer, and the drug body is located between the two groups of degradable layers.

[0011] Optionally, the positioning member also includes a first mounting hole and a second mounting hole opened 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, and 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 is contracted and adapted to the rod 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 is contracted and adapted to the rod of the second bolt.

[0012] Optionally, the rod of the first bolt is provided with a socket compatible with the second bolt, the top of the first bolt is hollow, and a connecting bolt is inserted inside the first bolt, the head of the connecting bolt is located in the hollow part of the top of the first bolt, and a positioning hole compatible with the connecting bolt is provided on the surface of the second bolt, and a positioning mechanism is provided between the first bolt and the first mounting hole and between the second bolt and the second mounting hole, and the positioning mechanism can align the 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 a cylindrical groove opened in the head of the first bolt and the second bolt, and a connecting plate is installed inside the cylindrical groove, and a positioning rod is fixedly connected to the surface of the connecting plate, and the movement direction of the cylindrical groove, the connecting plate and the positioning rod is 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 is contracted and adapted to the positioning rod, and a positioning elastic member is arranged inside the cylindrical groove, and the inner walls of the first mounting hole and the second mounting hole are provided with a positioning groove adapted to the positioning rod, and a blocking mechanism is arranged inside the cylindrical groove, and when the blocking mechanism contacts the positioning rod, the blocking mechanism forms a movement interference with the positioning rod, and when the blocking mechanism does not contact the positioning rod, the positioning elastic member can drive the positioning rod to move.

[0014] Optionally, the blocking mechanism includes vertical grooves opened inside the first bolt and the second bolt, the vertical grooves are connected to the positioning grooves, the lower ends of the vertical grooves are set to be open, and partitions are set inside the vertical grooves, and the surfaces of the partitions are provided with through grooves that are compatible with the cylindrical grooves. The partitions can move up and down in the vertical grooves, and in the initial state, the closed ends of the partitions are located inside the cylindrical grooves.

[0015] Optionally, movable grooves are opened inside the first bolt and the second bolt, and vertical rods are installed inside the movable grooves. The lower ends of the vertical rods pass through the first bolt or the second bolt and are fixedly connected to the bottom plate. The lower ends of the partitions are fixedly connected to the bottom plate, and the surfaces of the vertical rods are sleeved with connecting elastic parts.

[0016] Optionally, the heads of the first bolt and the second bolt are both provided with a reset mechanism, and the reset mechanism can move the positioning rod out of the positioning groove to facilitate the removal of the first bolt and the second bolt.

[0017] Optionally, the reset mechanism includes a first mounting groove and a second mounting groove opened inside the first bolt and the second bolt, and the size of the second mounting groove is smaller than the size of the first mounting groove, and a corresponding reset plate is provided inside the second mounting groove, a connecting rope is fixedly connected between the reset plate and the positioning rod, and an elastic support member is fixedly connected between the reset plate and the bottom surface of the second mounting groove.

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

[0019] In the above scheme, by arranging the baffle plate, the guide rod and the drug administration elastic member, when the drug administration of the drug body at the far right end is completed, the guide rod in contact with the drug body moves to the right under the action of the drug administration elastic member, thereby driving the baffle plate connected to the guide rod to move, and the drug body located inside the baffle plate is placed in the body fluid, and the drug body can continue to be administered. According to the above steps, the drug body can be administered according to the drug 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 passed through the insertion hole, and the first bolt and the second bolt are fixed by the connecting bolt, so that the first bolt and the second bolt form a staggered internal locking structure inside the bone body, thereby strengthening the connection between the steel plate body and the bone body, and effectively preventing the first bolt and the second bolt from falling off;

[0021] By setting a reset mechanism, when removing the first bolt and the second bolt, the disassembly tool is inserted into the second installation groove and the reset plate is pressed. The reset plate moves downward to drive the connecting rope to move, so that the connecting rope pulls 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 removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

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

[0026] Figure 4 A flow chart of drug delivery of the drug carrier of the present invention;

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

[0028] Figure 6 For the present invention Figure 5 Schematic diagram of the structure of the part;

[0029] Figure 7 It is a structural schematic diagram of the blocking mechanism of the present invention when blocking the positioning rod;

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

[0031] Fig. 9 For the present invention Figure 6 The enlarged view of point A in the middle;

[0032] Fig.10 For the present invention Figure 6 The enlarged view of point B in the middle;

[0033] Fig.11 For the present invention Figure 7 Enlarged view of point C in the middle.

[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. Insertion hole; 27. Positioning hole;

[0037] 3. drug-carrying member; 31. drug-carrying hole; 32. drug body; 33. degradable layer; 34. slideway; 35. guide rod; 36. drug-delivering elastic member; 37. baffle;

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

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

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

[0041] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0042] The following is a detailed description of a lower limb fracture reinforced internal fixation steel plate provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0043] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0044] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0045] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0046] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0047] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an enhanced internal fixation steel plate for lower limb fractures, including a steel plate body 1, a drug-carrying part 3 is arranged in the middle of the steel plate body 1, and multiple groups of positioning parts 2 are arranged at both ends of the steel plate body 1, and the two ends of the steel plate body 1 are respectively connected to the fracture bone surface through the positioning parts 2, and when the steel plate body 1 is connected to the fracture, the drug-carrying part 3 is located at the fracture connection; the positioning parts 2 include a first bolt 21 and a second bolt 22, and the first bolt 21, the second bolt 22 and the steel plate body 1 form a triangular locking structure to strengthen the connection between the steel plate body 1 and the bone surface.

[0048] like Figure 3 to Figure 4 As shown, the drug-carrying part 3 includes a plurality of drug-carrying holes 31 opened on the surface of the steel plate body 1. The drug-carrying holes 31 are connected vertically and arranged along the fracture connection. Drug bodies 32 are installed inside the drug-carrying holes 31. The efficacy of the drug bodies 32 is enhanced in sequence according to the arrangement order, and the drug bodies 32 can be gradually administered according to the strength of the efficacy.

[0049] The efficacy of the drug body 32 increases from right to left. A slide groove 34 is provided between the two groups of drug loading holes 31 in the steel plate body 1. A baffle 37 is installed inside the slide groove 34. The baffle 37 is set to a U-shaped structure. The closed end of the baffle 37 is fixedly connected to a guide rod 35. One end of the guide rod 35 passes through the inside of one group of drug loading holes 31, and one end of the guide rod 35 is against the surface of the drug body 32 with low efficacy. Both sides of the open end of the baffle 37 pass through the inside of the other group of drug loading holes 31, and the drug body 32 with high efficacy is located inside the baffle 37. The surface of the guide rod 35 is sleeved with a drug delivery elastic member 36.

[0050] The upper and lower ports of the drug loading hole 31 are fixedly mounted with a degradable layer 33, and the drug body 32 is located between the two groups of degradable layers 33. By providing the degradable layer 33, the drug body 32 can be protected to prevent oxidation of the drug body 32.

[0051] In this embodiment, by setting up the baffle 37, the guide rod 35 and the drug administration elastic member 36, when the drug administration of the drug body 32 at the far right is completed, the guide rod 35 in contact with the drug body 32 is moved to the right under the action of the drug administration elastic member 36, thereby driving the baffle 37 connected to the guide rod 35 to move, and the drug body 32 located inside the baffle 37 is placed in the body fluid, and the drug body 32 can continue to be administered. According to the above steps, the drug body 32 can be administered according to the drug efficacy intensity stage, thereby improving the treatment effect.

[0052] like Figures 5 and 6 As shown, the positioning member 2 also 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, and 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 is contracted and adapted to the rod 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 is contracted and adapted to the rod of the second bolt 22.

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

[0054] like Figure 5As shown, the rod of the first bolt 21 is provided with a socket 26 that is compatible with the second bolt 22, the top of the first bolt 21 is hollow, and a connecting bolt 25 is inserted inside the first bolt 21, the head of the connecting bolt 25 is located in the hollow top of the first bolt 21, and a positioning hole 27 that is compatible with 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 socket 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, the second bolt 22 can be screwed into the bone body and passed through the hole 26 through the surface of the first bolt 21, 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 interlaced internal locking structure inside the bone body, thereby strengthening the connection between the steel plate body 1 and the bone body, and can effectively prevent the first bolt 21 and the second bolt 22 from falling off.

[0056] like Figures 5 to 7 , Figures 9 to 11 As shown, the positioning mechanism 4 includes a cylindrical groove 43 opened in the head of the first bolt 21 and the second bolt 22, and a connecting plate 42 is installed inside the cylindrical groove 43. The surface of the connecting plate 42 is fixedly connected to the positioning rod 41. The moving directions of the cylindrical groove 43, the connecting plate 42 and the positioning rod 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 is contracted and matched with the positioning rod 41. A positioning elastic member 44 is arranged inside the cylindrical groove 43. The inner walls of the first mounting hole 23 and the second mounting hole 24 are provided with a positioning groove 45 matched with the positioning rod 41. A blocking mechanism 5 is arranged inside the cylindrical groove 43. When the blocking mechanism 5 contacts the positioning rod 41, the blocking mechanism 5 forms a moving interference with the positioning rod 41. When the blocking mechanism 5 does not contact the positioning rod 41, the positioning elastic member 44 can drive the positioning rod 41 to move.

[0057] The blocking mechanism 5 includes a vertical groove 51 opened inside the first bolt 21 and the second bolt 22. The vertical groove 51 is connected to the positioning groove 45. The lower end of the vertical groove 51 is set to be open, and a partition 52 is set inside the vertical groove 51. The surface of the partition 52 is provided with a through groove 53 adapted to the cylindrical groove 43. The partition 52 can move up and down in the vertical groove 51. In the initial state, the closed end of the partition 52 is located inside the cylindrical groove 43.

[0058] A movable groove 55 is provided inside the first bolt 21 and the second bolt 22, and a vertical rod 54 is installed inside the movable groove 55. The lower end of the vertical rod 54 passes 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 52 is fixedly connected to the bottom plate 57, and a connecting elastic member 56 is sleeved on the surface of the vertical rod 54.

[0059] In this embodiment, by setting the positioning mechanism 4 and the blocking mechanism 5 for use in conjunction, when installing the first bolt 21 and the second bolt 22, the insertion hole 26 and the positioning hole 27 can be automatically positioned, so that the insertion hole 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 mounting hole 23 or the head of the second bolt 22 is screwed into the second mounting hole 24, the blocking mechanism 5 first contacts the inner wall of the first mounting hole 23 or the second mounting hole 24. As the first bolt 21 and the second bolt 22 continue to be fed, the bottom plate 57 is hindered by the bottom of the first mounting hole 23 or the second mounting 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, and the partition plate 52 moves relative to the first bolt 21 or the second bolt 22. When the vertical slot 51 moves upward, when the through slot 53 on the partition 52 moves to be aligned with the cylindrical slot 43, the partition 52 no longer interferes with the movement of the positioning rod 41. Under the action of the positioning elastic member 44, one end of the positioning rod 41 can be against the inner surface of the first mounting hole 23 or the second mounting hole 24 through the through slot 53. When the head of the first bolt 21 is completely installed in the first mounting hole 23 or the head of the second bolt 22 is completely installed in the second mounting hole 24, the height of the positioning rod 41 is consistent with the height of the positioning slot 45. At this time, the first bolt 21 or the second bolt 22 can be rotated again. When the positioning rod 41 is rotated to align with the positioning slot 45, the positioning elastic member 44 can push the positioning rod 41 to insert into the positioning slot 45, thereby positioning the first bolt 21 or the second bolt 22, that is, the insertion hole 26 and the positioning hole 27 can be positioned.

[0060] like Figures 6 to 8 As shown, the first bolt 21 and the second bolt 22 are both provided with a reset mechanism 6 at their heads, and the reset mechanism 6 can move the positioning rod 41 out of the positioning groove 45 to facilitate the removal of the first bolt 21 and the second bolt 22 .

[0061] The reset mechanism 6 includes a first mounting groove 61 and a second mounting groove 62 which are opened inside the first bolt 21 and the second bolt 22, and the size of the second mounting groove 62 is smaller than that of the first mounting groove 61. A matching reset plate 63 is arranged inside the second mounting groove 62, a connecting rope 64 is fixedly connected between the reset plate 63 and the positioning rod 41, and an elastic support member 65 is fixedly connected between the reset plate 63 and the bottom surface of the second mounting groove 62.

[0062] In this embodiment, by setting a reset mechanism 6, when the first bolt 21 and the second bolt 22 are removed, the positioning rod 41 can be moved out from the positioning groove 45. Specifically, the first installation groove 61 and the second installation groove 62 are respectively used for installation and disassembly, wherein the shapes of the first installation groove 61 and the second installation groove 62 are both set to be regular hexagons. During installation and disassembly, it is necessary to equip installation and disassembly tools that are respectively adapted to the first installation groove 61 and the second installation groove 62. When the first bolt 21 and the second bolt 22 are removed, the disassembly tool is inserted into the second installation groove 62 and the reset plate 63 is pressed. The reset plate 63 moves downward, thereby 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, so that the first bolt 21 or the second bolt 22 can be removed.

[0063] The workflow 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 insertion hole 26 and the positioning hole 27 can be automatically positioned so that the insertion hole 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 mounting hole 23 or the head of the second bolt 22 is screwed into the second mounting hole 24, the blocking mechanism 5 first contacts the inner wall of the first mounting hole 23 or the second mounting hole 24. As the first bolt 21 and the second bolt 22 continue to be fed, the bottom plate 57 is hindered by the bottom of the first mounting hole 23 or the second mounting 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, and the partition plate 52 moves up relative to the vertical slot 51. When the partition plate 52 moves upward, the partition plate 52 moves upward relative to the vertical slot 51. When the through slot 53 on the plate 52 moves to be aligned with the cylindrical slot 43, the partition 52 no longer interferes with the movement of the positioning rod 41. Under the action of the positioning elastic member 44, one end of the positioning rod 41 can be against the inner surface of the first mounting hole 23 or the second mounting hole 24 through the through slot 53. When the head of the first bolt 21 is completely installed in the first mounting hole 23 or the head of the second bolt 22 is completely installed in the second mounting hole 24, the height of the positioning rod 41 is consistent with the height of the positioning slot 45. At this time, the first bolt 21 or the second bolt 22 can be rotated again. When the positioning rod 41 is rotated to align with the positioning slot 45, the positioning elastic member 44 can push the positioning rod 41 to insert into the positioning slot 45, thereby positioning the first bolt 21 or the second bolt 22, that is, the insertion hole 26 and the positioning hole 27 can be positioned.

[0065] By setting up the baffle 37, the guide rod 35 and the drug administration elastic member 36, when the drug administration of the drug body 32 at the far right is completed, the guide rod 35 in contact with the drug body 32 is moved to the right under the action of the drug administration elastic member 36, thereby driving the baffle 37 connected to the guide rod 35 to move, and the drug body 32 located inside the baffle 37 is placed in the body fluid, and the drug body 32 can continue to be administered. According to the above steps, the drug body 32 can be administered according to the stage of drug efficacy intensity, thereby improving the treatment effect.

[0066] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lower limb fracture enhanced internal fixation steel plate, comprising a steel plate body, characterized in that: A drug-carrying part is arranged in the middle of the steel plate body, and multiple groups of positioning parts are arranged 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 parts, and when the steel plate body is connected to the fracture, the drug-carrying part is located at the fracture connection; The positioning members each include a first bolt and a second bolt, and 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 part includes a plurality of drug-carrying holes opened on the surface of the steel plate body, the drug-carrying holes are connected vertically and arranged along the fracture connection, drug bodies are installed inside the drug-carrying holes, and the efficacy of the drug bodies is enhanced in sequence according to the arrangement order, and the drug bodies can be gradually administered according to the strength of the efficacy.

2. The lower limb fracture enhanced internal fixation steel plate according to claim 1, characterized in that: The efficacy of the drug body increases from right to left. A slide groove is provided in the steel plate body between the two groups of drug loading holes. A baffle is installed inside the slide groove. The baffle is set to a U-shaped structure. The closed ends of the baffles are fixedly connected with guide rods. One end of the guide rod passes through one group of drug loading holes, and one end of the guide rod is against the surface of the drug body with low efficacy. Both sides of the open end of the baffle pass through the other group of drug loading holes, and the drug body with high efficacy is located inside the baffle. The surface of the guide rod is sleeved with a drug delivery elastic member.

3. The lower limb fracture enhanced internal fixation steel plate according to claim 2, characterized in that: The upper port and the lower port of the drug loading hole are both fixedly mounted with a degradable layer, and the drug body is located between the two groups of degradable layers.

4. The lower limb fracture enhanced internal fixation steel plate according to claim 1, characterized in that: The positioning member also includes a first mounting hole and a second mounting hole opened 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, and 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 is contracted and adapted to the rod 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 is contracted and adapted to the rod of the second bolt.

5. The lower limb fracture enhanced internal fixation steel plate according to claim 4, characterized in that: The rod of the first bolt is provided with a socket matched with the second bolt, the top of the first bolt is hollow, and a connecting bolt is inserted inside the first bolt, the head of the connecting bolt is located in the hollow part of the top of the first bolt, and the surface of the second bolt is provided with a positioning hole matched with the connecting bolt, and positioning mechanisms are provided between the first bolt and the first mounting hole and between the second bolt and the second mounting hole, and the positioning mechanism can align the socket with the installation direction of the second bolt and the positioning hole with the installation direction of the connecting bolt.

6. The lower limb fracture enhanced internal fixation steel plate according to claim 5, characterized in that: The positioning mechanism includes a cylindrical groove opened in the head of the first bolt and the second bolt, and a connecting plate is installed inside the cylindrical groove, and a positioning rod is fixedly connected to the surface of the connecting plate. The moving direction of the cylindrical groove, the connecting plate and the positioning rod is 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 is contracted and adapted to the positioning rod. A positioning elastic part is arranged inside the cylindrical groove. The inner walls of the first mounting hole and the second mounting hole are provided with a positioning groove adapted to the positioning rod. A blocking mechanism is arranged inside the cylindrical groove. When the blocking mechanism contacts the positioning rod, the blocking mechanism forms a moving interference with the positioning rod. When the blocking mechanism does not contact the positioning rod, the positioning elastic part can drive the positioning rod to move.

7. The lower limb fracture enhanced internal fixation steel plate according to claim 6, characterized in that: The blocking mechanism includes vertical grooves opened inside the first bolt and the second bolt, the vertical grooves are connected to the positioning grooves, the lower ends of the vertical grooves are opened, and partitions are arranged inside the vertical grooves. The surfaces of the partitions are provided with through grooves matched with the cylindrical grooves. The partitions can move up and down in the vertical grooves. In the initial state, the closed end of the partition is located inside the cylindrical groove.

8. The lower limb fracture enhanced internal fixation steel plate according to claim 7, characterized in that: The first bolt and the second bolt are each provided with a movable groove, and a vertical rod is installed in the movable groove. The lower end of the vertical rod passes through the first bolt or the second bolt and is fixedly connected to the bottom plate. The lower end of the partition is fixedly connected to the bottom plate, and the surface of the vertical rod is provided with a connecting elastic member.

9. The lower limb fracture enhanced internal fixation steel plate according to claim 8, characterized in that: The first bolt and the second bolt heads are both provided with a reset mechanism, and the reset mechanism can move the positioning rod out of the positioning groove to facilitate the disassembly of the first bolt and the second bolt.

10. The lower limb fracture enhanced internal fixation steel plate according to claim 9, characterized in that: The reset mechanisms include a first mounting groove and a second mounting groove opened inside the first bolt and the second bolt, and the size of the second mounting groove is smaller than that of the first mounting groove. A matching reset plate is provided inside the second mounting groove, a connecting rope is fixedly connected between the reset plate and the positioning rod, and an elastic support member is fixedly connected between the reset plate and the bottom surface of the second mounting groove.

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