Splicing type bone fracture plate suitable for multi-angle connection

Abstract

The invention relates to the field of medical instruments, in particular to a splicing type bone fracture plate suitable for multi-angle connection, which comprises a main plate and a connecting mechanism. When the bone fracture plate is used, according to the angle needed by the bone fracture plate, the adjacent first lug seats and second lug seats on the two main plates are overlapped together, the meshing teeth are embedded into the meshing grooves, at the moment, the adjacent first connecting holes in the two main plates are aligned with the second connecting holes, and the lower connecting pipe and the upper connecting pipe are inserted into the first connecting holes and the second connecting holes respectively; and the upper connecting pipe and the lower connecting pipe are screwed until the first protrusion and the second protrusion abut against the first lug seat and the second lug seat correspondingly, and therefore the two spliced main plates are fixedly connected for use. According to the bone fracture plate, the multiple main plates of the same shape are spliced to form the bone fracture plate, the length and angle of the bone fracture plate can be adjusted, the bone fracture plate can be flexibly adjusted according to individual differences of different patients, and universality is high. And the specifications and sizes are uniform, so that various specifications of stock, disinfection, selection and search are avoided.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a spliced ​​bone plate suitable for connection at various angles. Background Art

[0002] Plate and screw osteosynthesis is a common method for fracture treatment. The plate is combined with screws, which are connected to the fractured bone fragments to achieve stable fixation of the fracture fragments. However, due to the different fracture conditions of each patient, the existing plate structure is fixed and has many length specifications. All of them often need to be stocked to meet the needs of surgery, which will lead to a large workload for inventory and acceptance, high disinfection costs, slow selection and search, and the standard model of plate cannot be flexibly adjusted according to the individual differences of different patients, and has poor versatility. Summary of the invention

[0003] In view of the deficiencies of the above background technology, the present invention provides a spliced ​​bone plate suitable for connection at various angles.

[0004] The present invention adopts the following technical solution: A spliced ​​bone fracture plate suitable for connection at various angles, the bone fracture plate comprising: A main board, wherein the end surfaces at both ends of the main board are respectively provided with a first ear seat and a second ear seat, the circumferential surfaces of the first ear seat and the second ear seat are arc surface structures, the upper surface of the first ear seat is provided with a plurality of meshing teeth, the number of the meshing teeth is at least twenty, and the meshing teeth are arranged in a circumferential array, the lower surface of the second ear seat is provided with a plurality of meshing grooves matched with the meshing teeth, the meshing grooves are arranged in a circumferential array, and a first connecting hole penetrating to the lower surface of the first ear seat is provided at the center of the meshing teeth, a second connecting hole penetrating to the upper surface of the second ear seat is provided at the center of the meshing groove, and the aperture of the first connecting hole is equal to the aperture of the second connecting hole; A connecting mechanism, the connecting mechanism comprising a lower connecting tube and an upper connecting tube, the outer tube diameter of the lower connecting tube being equal to the hole diameter of the first connecting hole, the lower connecting tube being detachably sleeved on the outer side of the upper connecting tube, and the lower connecting tube and the upper connecting tube being threadedly connected, the tube wall of the bottom tube opening of the lower connecting tube protrudes outward to form a first protrusion, the tube wall of the top tube opening of the upper connecting tube protrudes outward to form a second protrusion, and the cross-sectional areas of the first protrusion and the second protrusion are both larger than the hole area of ​​the first connecting hole; Wherein, the lower connecting tube and the upper connecting tube act in the first connecting hole and the second connecting hole to fix the two spliced ​​main boards.

[0005] As a further improvement, at least one fixing hole is provided on the upper surface of the mainboard, and the fixing hole runs through the mainboard.

[0006] As a further improvement, a second groove is provided on the upper surface of the second ear seat, and the second groove is provided on the circumference of the second connecting hole. The second groove is used to place the second protrusion, and the second groove can accommodate the rotating second protrusion.

[0007] As a further improvement, a first groove is provided on the lower surface of the first ear seat. The first groove is provided on the circumference of the first connecting hole, and the first groove is used to fix and place the first protrusion.

[0008] As a further improvement, when the cross-section of the first protrusion is circular, a blocking block is provided on the upper surface of the first protrusion, and a blocking groove matching the blocking block is provided at the bottom of the first groove, and when the first protrusion is placed in the first groove, the blocking block is embedded in the blocking groove.

[0009] As a further improvement, when the cross section of the first protrusion is non-circular, the first groove is matched with the first protrusion.

[0010] As a further improvement, the bone plate further comprises a screw-on portion, which comprises a screw-on plate, and the screw-on plate is detachably arranged on the second protrusion, and the screw-on portion is used to operate and tighten the lower connecting tube and the upper connecting tube.

[0011] As a further improvement, the upper surface of the second protrusion is provided with a plurality of limit grooves, and the lower surface of the screw-on plate is provided with a plurality of limit blocks matching the limit grooves. When the screw-on plate covers the upper surface of the second protrusion, the limit blocks are respectively embedded in the limit grooves.

[0012] As a further improvement, a cross groove is provided on the upper surface of the screw-on plate.

[0013] As a further improvement, a guide column is provided on the lower surface of the screw-in plate, the diameter of the guide column is smaller than the inner tube diameter of the upper connecting tube, and the bottom end of the guide column is a conical structure. When the screw-in plate covers the upper surface of the second protrusion, the guide column is inserted into the upper connecting tube.

[0014] It can be seen from the above description of the structure of the present invention that compared with the prior art, the present invention has the following advantages: when in use, according to the angle required by the bone plate, the adjacent first ear seat and the second ear seat on the two main boards are overlapped together, so that the meshing teeth are embedded in the meshing groove. At this time, the adjacent first connecting holes on the two main boards are aligned with the second connecting holes, and the lower connecting tube and the upper connecting tube are respectively inserted into the first connecting hole and the second connecting hole, so that the upper connecting tube and the lower connecting tube are screwed together until the first protrusion and the second protrusion respectively abut against the first ear seat and the second ear seat, thereby fixing the two spliced ​​main boards for use. The present invention splices a plurality of main boards of the same shape to form a bone plate, so that the bone plate can be adjusted in length and angle, can be flexibly adjusted according to the individual differences of different patients, and has strong versatility. And the specifications and sizes are unified, avoiding the need for stocking, disinfection, and selection and searching of multiple specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the motherboard.

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the motherboard from another perspective.

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the connecting mechanism.

[0019] Figure 5 Schematic diagram of the exploded structure of the connection mechanism.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting mechanism and the screw-on part.

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the screw-on part.

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of another splicing shape of two main boards.

[0023] Fig. 9 It is a schematic diagram of the exploded structure of the two main boards and the connecting board.

[0024] Fig.10 It is a schematic diagram of the three-dimensional structure after the two main boards and the connecting board are spliced ​​together.

[0025] Fig.11 It is a schematic diagram of the three-dimensional structure when the cross section of the first protrusion is non-circular.

[0026] Fig.12 A schematic diagram of the three-dimensional structure of a hexagonal countersunk hole provided on the upper connecting pipe. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] As attached Figure 1 and Figure 2 As shown, a spliced ​​bone plate suitable for connection at various angles includes a main plate 1 and a connection mechanism 2.

[0029] As attached Figures 1 to 3 As shown, the end surfaces of both ends of the main board 1 are respectively provided with a first ear seat 11 and a second ear seat 14, the upper surface of the first ear seat 11 is provided with a plurality of meshing teeth 12, the number of the meshing teeth 12 is at least twenty, and the meshing teeth 12 are arranged in a circumferential array, and the lower surface of the second ear seat 14 is provided with a plurality of meshing grooves 15 that match the meshing teeth 12, and the meshing grooves 15 are arranged in a circumferential array. When splicing the two main boards 1, according to the angle required by the bone plate, the adjacent first ear seats 11 and second ear seats 14 on the two main boards 1 are overlapped together, so that the meshing teeth 12 are respectively embedded in the meshing grooves 15 that are closest to them. While ensuring the accuracy of the angle of the bone plate to the greatest extent, the inner wall of the meshing groove 15 is used to limit the outer surface of the meshing teeth 12, so as to enhance the connection stability between the two main boards 1 and reduce the risk of the two main boards 1 being skewed and affecting the use when they are installed and fixed. In addition, the surfaces of the two spliced ​​main boards 1 are flat to avoid discomfort caused by the bone plate when in use. The more the number of meshing teeth 12 and meshing grooves 15 is, the wider the adjustable angle range between the two main boards 1 is, and the more accurate the angle adjustment is.

[0030] Preferably, the peripheral surfaces of the first ear seat 11 and the second ear seat 14 are arc surface structures, which can maximize the rotation angle of the two main boards 1 and avoid the protrusion of the first ear seat 11 or the second ear seat 14 on the two spliced ​​main boards 1, which affects the comfort of the bone plate.

[0031] The connecting mechanism 2 is used to fix and splice the two main boards 1. Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8As shown, the center of the meshing tooth 12 is provided with a first connection hole 13 penetrating to the lower surface of the first ear seat 11, the center of the meshing groove 15 is provided with a second connection hole 16 penetrating to the upper surface of the second ear seat 14, and the aperture of the first connection hole 13 is equal to the aperture of the second connection hole 16, wherein the connection mechanism 2 includes a lower connection tube 21 and an upper connection tube 22, the outer tube diameter of the lower connection tube 21 is equal to the aperture of the first connection hole 13, the inner tube wall of the lower connection tube 21 is provided with an internal thread, and the outer tube wall of the upper connection tube 22 is provided with an internal thread. When in use, the lower connection tube 21 and the upper connection tube 22 are threadedly connected, so that the lower connection tube 21 can be detachably sleeved on the outer side of the upper connection tube 22. In addition, since the tube wall of the bottom tube opening of the lower connecting tube 21 protrudes outward to form the first protrusion 211, the tube wall of the top tube opening of the upper connecting tube 22 protrudes outward to form the second protrusion 221, and the cross-sectional areas of the first protrusion 211 and the second protrusion 221 are both larger than the hole area of ​​the first connecting hole 13. In the two spliced ​​main boards 1, the adjacent first connecting holes 13 on the two main boards 1 are aligned with the second connecting holes 16, and then the lower connecting tube 21 is inserted into the first connecting hole 13, and the upper connecting tube 22 is inserted from the second connecting hole 16. During the process, the upper connecting tube 22 or the lower connecting tube 21 is rotated to make the upper connecting tube 22 and the lower connecting tube 21 screwed together until the first protrusion 211 presses the first ear seat 11, and the second protrusion 221 presses the second ear seat 14 and then stops. At this time, the first protrusion 211 and the second protrusion 221 clamp and fix the first ear seat 11 and the second ear seat 14, so as to fix the two spliced ​​main boards 1, and prevent the spliced ​​bone plate from loosening or shifting during the movement or fixation process, which affects the use. And when it is found that there is an error or mistake in the splicing of the main board 1, the lower connecting tube 21 and the upper connecting tube 22 can be loosened or unscrewed, and the main board 1 can be adjusted at this time, and can be fixed and used again after adjustment, without discarding the main board 1, saving resources. The structure of screwing the lower connecting tube 21 and the upper connecting tube 22 together can be the following embodiments: Embodiment 1: As shown in the attached Figures 5 to 7 As shown, the lower connecting tube 21 and the upper connecting tube 22 are screwed together and fixed by the screwing part 3. Specifically, the screwing part 3 includes a screwing plate 31, which is detachably arranged on the second protrusion 221, wherein the upper surface of the second protrusion 221 is provided with a plurality of limit grooves 222, and the lower surface of the screwing plate 31 is provided with a plurality of limit blocks 32 that match the limit grooves 222. When the screwing plate 31 covers the upper surface of the second protrusion 221, the limit blocks 32 are respectively embedded in the limit grooves 222, and the inner wall of the limit groove 222 is used to limit the outer surface of the limit block 32, so that when the screwing plate 31 is rotated, the second protrusion 221 can drive the upper connecting tube 22 to rotate accordingly.

[0032] Embodiment 2: As shown in the attached Fig.12As shown, the upper surface of the second protrusion 221 is provided with a downwardly sunken countersunk hole 223, which is arranged around the pipe opening of the upper connecting pipe 22, and the cross section of the countersunk hole 223 is a regular hexagon, forming a hexagonal hole. When in use, the upper connecting pipe 22 is directly rotated by a manual or electric hexagonal wrench.

[0033] After adopting the above structure, when the upper connecting tube 22 is rotated, the screwing and fixing of the lower connecting tube 21 and the upper connecting tube 22 can be completed, so that the two spliced ​​main boards 1 are fixedly connected to form a bone plate. Among them, in embodiment 1, after the screwing of the lower connecting tube 21 and the upper connecting tube 22 is completed, the screwing part 3 can be removed from the second protrusion 221 to expose the diameter of the upper connecting tube 22, and in embodiment 2, the diameter of the upper connecting tube 22 can also be exposed by removing the hexagonal wrench. When the spliced ​​bone plate is fixed on the fractured bone block, the screw is passed through the diameter of the upper connecting tube 22 and connected to the fractured bone block to complete the installation of the bone plate. Among them, the bone plate is fixed to the fractured bone block at the connection points at both ends of the main board 1. On the one hand, it can enhance the connection stability at the connection points on the spliced ​​main board 1, further reduce the risk of loosening of the spliced ​​bone plate during use, and on the other hand, it can make the main board 1 more firmly fixed on the fractured bone block, thereby playing a good supporting and connecting role for the fractured bone block.

[0034] Preferably, a countersunk hole 223 can also be provided at the tube opening of the upper connecting tube 22 on the upper surface of the second protrusion 221 in the first embodiment, so that the head of the screw for fixing the bone plate is placed in the countersunk hole 223 to prevent the screw head from protruding from the surface of the bone plate, thereby reducing the foreign body sensation of the bone plate in the body. Figure 2 As shown, at least one fixing hole 17 can be provided on the upper surface of the main board 1, and the fixing hole 17 is provided through the main board 1. The fixing hole 17 is used to pass a screw, so as to help the main board 1 to be more firmly fixed on the fractured bone block. At the same time, a countersunk hole 223 can also be provided at the opening of the fixing hole 17 on the surface of the main board 1 to place the head of the screw.

[0035] Further, as attached Figure 5 and Figure 7 As shown, the upper surface of the screwing plate 31 in the first embodiment can be provided with a cross groove 3a, so that the screwing plate 31 can be rotated by tools such as a cross screwdriver and a flat screwdriver, thereby driving the upper connecting tube 22 to rotate, and facilitating the splicing of the bone plate. In addition, a guide column 33 is provided on the lower surface of the screwing plate 31, and the diameter of the guide column 33 is smaller than the inner diameter of the upper connecting tube 22, and the bottom end of the guide column 33 is a conical structure. When the screwing plate 31 covers the upper surface of the second protrusion 221, the guide column 33 is inserted into the upper connecting tube 22, and the guide column 33 can play a good guiding role in the placement of the screwing plate 31, and it is convenient and quick to align the limit block 32 with the limit groove 222.

[0036] In addition, if attached Figure 1 and Figure 2 As shown, the first ear seat 11 or the second ear seat 14 far away from the splicing point on the main board 1 of the spliced ​​bone plate can be selected to be connected and fixed by a separate second ear seat 14 or first ear seat 11 that is compatible with it through a connecting mechanism 2, and the main board 1 is filled with a separate second ear seat 14 or first ear seat 11, so that the surface of the spliced ​​bone plate can be flat, avoiding discomfort during use.

[0037] It is worth mentioning that Figures 3 to 5 As shown, when the lower connecting tube 21 and the upper connecting tube 22 are screwed together, the lower connecting tube 21 is fixed on the first ear seat 11, wherein the lower surface of the first ear seat 11 is provided with a first groove 131, and the first groove 131 is arranged on the circumference of the first connecting hole 13, and the first groove 131 is used to fix the first protrusion 211. Specifically, when the cross-section of the first protrusion 211 is circular, a clamping block 212 is provided on the upper surface of the first protrusion 211, and a clamping groove 132 matching the clamping block 212 is provided at the bottom of the first groove 131. When screwing the lower connecting tube 21 and the upper connecting tube 22 together, the first protrusion 211 of the lower connecting tube 21 is pushed into the first groove 131, so that the clamping block 212 is embedded in the clamping groove 132. The inner wall of the clamping groove 132 restricts the side of the clamping block 212, so that the lower connecting tube 21 can be prevented from rotating during the screwing process, thereby ensuring that the lower connecting tube 21 and the upper connecting tube 22 can be screwed together. At the same time, the first protrusion 211 is placed in the first groove 131 to prevent the first protrusion 211 from protruding and causing discomfort during use. In addition, as shown in the attached Fig.11 As shown, when the cross section of the first protrusion 211 is non-circular, the first groove 131 is adapted to the first protrusion 211. When the lower connecting tube 21 and the upper connecting tube 22 are screwed together, the first protrusion 211 of the lower connecting tube 21 is pushed into the first groove 131, and the inner wall of the first groove 131 restricts the side of the first protrusion 211, so that the lower connecting tube 21 can be prevented from rotating during the screwing process, thereby ensuring that the lower connecting tube 21 and the upper connecting tube 22 can be screwed together.

[0038] In addition, as attached Figure 2 and Figure 5 As shown, the upper surface of the second ear seat 14 is provided with a second groove 161, and the second groove 161 is arranged on the circumference of the second connecting hole 16. The second groove 161 is used to place the second protrusion 221, and the second groove 161 can accommodate the rotating second protrusion 221. After the lower connecting tube 21 and the upper connecting tube 22 are screwed together, the second protrusion 221 is placed in the first groove 131 to avoid the second protrusion 221 from protruding and causing discomfort during use.

[0039] In summary, when the present invention is used, the number of main boards 1 is selected according to the actual situation of the fractured bone block, and the adjacent first ear seats 11 and second ear seats 14 on the two main boards 1 are overlapped according to the angle required by the bone plate, so that the meshing teeth 12 are respectively embedded in the meshing grooves 15 closest thereto, at this time, the adjacent first connecting holes 13 on the two main boards 1 are aligned with the second connecting holes 16, and then the lower connecting tube 21 is inserted into the first connecting hole 13, and the upper connecting tube 22 is inserted from the second connecting hole 16, and the upper connecting tube 22 is rotated during the process, so that the upper connecting tube 22 and the lower connecting tube 21 are screwed together until the first protrusion 211 abuts against the first ear seat 11, and the second protrusion 221 abuts against the second ear seat 14, so that the two spliced ​​main boards 1 are fixedly connected, and the spliced ​​bone plate is prevented from loosening and shifting during the movement or fixation process, which affects the use. The present invention splices a plurality of main boards 1 of the same shape to form a bone plate, so that the bone plate can be adjusted in length and angle, and can be flexibly adjusted according to the individual differences of different patients, and has strong versatility. The specifications and sizes are unified, which avoids the need to stock, sterilize and select and search for multiple specifications.

[0040] In addition, if attached Fig. 9 and Fig.10 As shown, when a "T"-shaped or "Y"-shaped bone plate needs to be spliced, the main board 1 can be spliced ​​with the connecting board 4, wherein the middle part of the end surface of both ends of the connecting board 4 is provided with a third ear seat 41, and the upper and lower surfaces of the third ear seat 41 are respectively provided with a meshing groove 15 and a meshing tooth 12 that match the meshing tooth 12 and the meshing groove 15 on the main board 1, and the third ear seat 41 is provided with a third connecting hole 42 that penetrates the meshing groove 15 and the meshing tooth 12. When splicing, the third ear seat 41 at one end of the connecting board 4 is inserted between the connecting points of the two overlapping main boards 1, so that the meshing groove 15 and the meshing tooth 12 on the third ear seat 41 are meshed with the meshing teeth 12 and the meshing groove 15 on the two main boards 1, and the first connecting hole 13 and the second connecting hole 16 are aligned with the third connecting hole 42, and then the two main boards 1 and the connecting board 4 are fixedly connected by the connecting mechanism 2 to complete the splicing of the "T"-shaped and "Y"-shaped bone plates. Among them, only the thickness of the first ear seat 11 and the second ear seat 14 needs to be reduced to make the surface of the main board 1 and the connecting board 4 flush after the splicing is completed, and the first ear seat 11, the second ear seat 14 or the third ear seat 41 on the main board 1 and the connecting board 4 away from the splicing point can be filled with a second ear seat 14 or a first ear seat 11 that matches them. Therefore, when in use, only the connecting board 4, two specifications of the main board 1 and the second ear seat 14 or the first ear seat 11 are needed, which can ensure the use and reduce the difficulty of finding.

[0041] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A spliced ​​bone plate suitable for connection at various angles, characterized in that: The bone plate includes: A main board, wherein the end surfaces at both ends of the main board are respectively provided with a first ear seat and a second ear seat, the circumferential surfaces of the first ear seat and the second ear seat are arc surface structures, the upper surface of the first ear seat is provided with a plurality of meshing teeth, the number of the meshing teeth is at least twenty, and the meshing teeth are arranged in a circumferential array, the lower surface of the second ear seat is provided with a plurality of meshing grooves matched with the meshing teeth, the meshing grooves are arranged in a circumferential array, and a first connecting hole penetrating to the lower surface of the first ear seat is provided at the center of the meshing teeth, a second connecting hole penetrating to the upper surface of the second ear seat is provided at the center of the meshing groove, and the aperture of the first connecting hole is equal to the aperture of the second connecting hole; A connecting mechanism, the connecting mechanism comprising a lower connecting tube and an upper connecting tube, the outer tube diameter of the lower connecting tube being equal to the hole diameter of the first connecting hole, the lower connecting tube being detachably sleeved on the outer side of the upper connecting tube, and the lower connecting tube and the upper connecting tube being threadedly connected, the tube wall of the bottom tube opening of the lower connecting tube protrudes outward to form a first protrusion, the tube wall of the top tube opening of the upper connecting tube protrudes outward to form a second protrusion, and the cross-sectional areas of the first protrusion and the second protrusion are both larger than the hole area of ​​the first connecting hole; Wherein, the lower connecting tube and the upper connecting tube act in the first connecting hole and the second connecting hole to fix the two spliced ​​main boards.

2. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 1, characterized in that: At least one fixing hole is disposed on the upper surface of the mainboard, and the fixing hole penetrates the mainboard.

3. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 1, characterized in that: A second groove is provided on the upper surface of the second ear seat. The second groove is provided on the circumference of the second connecting hole. The second groove is used to place the second protrusion, and the second groove can accommodate the rotating second protrusion.

4. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 1, characterized in that: A first groove is provided on the lower surface of the first ear seat. The first groove is provided on the circumference of the first connecting hole and is used for fixing and placing the first protrusion.

5. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 4, characterized in that: When the cross section of the first protrusion is circular, a block is provided on the upper surface of the first protrusion, and a groove matching the block is provided at the bottom of the first groove. When the first protrusion is placed in the first groove, the block is embedded in the groove.

6. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 4, characterized in that: When the cross section of the first protrusion is non-circular, the first groove is matched with the first protrusion.

7. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 1, characterized in that: The bone fracture plate further comprises a screw-on portion, which comprises a screw-on plate. The screw-on plate is detachably arranged on the second protrusion, and the screw-on portion is used for operating and tightening the lower connecting tube and the upper connecting tube.

8. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 7, characterized in that: The upper surface of the second protrusion is provided with a plurality of limiting grooves, and the lower surface of the screwing plate is provided with a plurality of limiting blocks matched with the limiting grooves. When the screwing plate covers the upper surface of the second protrusion, the limiting blocks are respectively embedded in the limiting grooves.

9. A spliced ​​bone plate suitable for connection at various angles as claimed in claim 7, characterized in that: The upper surface of the screwing plate is provided with a cross groove.

10. The spliced ​​bone plate suitable for connection at various angles as claimed in claim 7, characterized in that: A guide column is provided on the lower surface of the screw-on plate, the diameter of which is smaller than the inner diameter of the upper connecting tube, and the bottom end of the guide column is a conical structure. When the screw-on plate covers the upper surface of the second protrusion, the guide column is inserted into the upper connecting tube.

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