Ankle joint osteotomy guide plate assembly

Abstract

The utility model discloses an ankle joint osteotomy guide plate assembly which comprises a guide plate, the bottom of the guide plate is fixedly connected with a connecting shaft, the circumferential outer wall of the connecting shaft is rotationally connected with a connecting shell, one end of the connecting shaft penetrates through the connecting shell and is fixedly connected with a worm gear, and the inner wall of one side of the connecting shell is rotationally connected with a worm. A worm is arranged in the connecting shell and meshed with the worm gear, one end of the worm penetrates through the connecting shell to be fixedly connected with a handle, a positioning cylinder is fixedly connected to the circumferential outer wall of the handle, a plurality of positioning holes are formed in the circumferential outer wall of the positioning cylinder, an installation shell is fixedly connected to the outer wall of one side of the connecting shell, and a rotating plate is rotationally connected between the inner walls of the two sides of the installation shell. The angle of the guide plate is adjusted by rotating the handle, the problem that the use requirements of people cannot be met is solved, the stability of the guide plate during use can be improved, and accurate control over the osteotomy depth can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ankle joint replacement, in particular to an ankle joint osteotomy guide plate assembly. Background Technique

[0002] Ankle joint replacement is for patients with ankle arthritis. Through minimally invasive surgery, only the surface of the diseased compartment on one side of the ankle joint is replaced, the diseased cartilage surface is replaced, and all ligament tissues and the articular cartilage of the remaining compartments are retained, so as to achieve rapid recovery after surgery. During osteotomy operation, the doctor first marks the osteotomy line above the tip of the medial malleolus, and then uses a medical oscillating saw along a certain angle to cut off the medial malleolus. To improve the accuracy of osteotomy operation, an osteotomy guide plate is needed to achieve precise osteotomy.

[0003] After retrieval, the Chinese patent with the publication number CN219250324U can accurately control the osteotomy depth by dynamically fine-tuning the position of the limiting frame during the operation, avoiding iatrogenic talar cartilage injury caused by over-deep osteotomy. However, there are still the following defects. When the osteotomy guide plate is used, it is difficult to adjust the angle according to the specific situation, which makes the operation difficult and does not meet the usage requirements of people. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose an ankle joint osteotomy guide plate assembly.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An ankle joint osteotomy guide plate assembly includes a guide plate. A connecting shaft is fixedly connected to the bottom of the guide plate. A connecting shell is rotatably connected to the circumferential outer wall of the connecting shaft. One end of the connecting shaft passes through the connecting shell and is fixedly connected to a worm gear. A worm is rotatably connected to one side inner wall of the connecting shell, and the worm is meshed with the worm gear. One end of the worm passes through the connecting shell and is fixedly connected to a handle. A positioning cylinder is fixedly connected to the circumferential outer wall of the handle. A plurality of positioning holes are formed in the circumferential outer wall of the positioning cylinder. An installation shell is fixedly connected to one side outer wall of the connecting shell. A rotating plate is rotatably connected between the two side inner walls of the installation shell. Two connecting blocks are slidably connected to one side of the installation shell. Square grooves are formed at one ends of the two connecting blocks. Pressing plates are fixedly connected to the tops of the two connecting blocks, and the pressing plates are slidable with respect to the installation shell. A first spring is fixedly connected to the bottom of the pressing plate. One end of the first spring is fixedly connected to a connecting rod. One end of the connecting rod is fixedly connected to a positioning rod, and the connecting rod is fixedly connected to a positioning rod, and the positioning rod is slidable with respect to the installation shell.

[0007] As a further solution of the present utility model, a threaded rod is rotatably connected to one side of the guide plate. A limit frame is threadedly connected to the circumferential outer wall of the threaded rod. Both sides of the limit frame are fixedly connected with sliders. Two guide rods are fixedly connected to one side of the guide plate, and the guide rods are slidable with the sliders.

[0008] As a further solution of the present utility model, scale lines are provided on the circumferential outer walls of both guide rods, and arrows are provided on one side of both sliders.

[0009] As a further solution of the present utility model, two positioning grooves are formed on one side of the installation shell. Slide rods are fixedly connected to the bottoms of both connecting blocks, and the slide rods are slidable with the positioning grooves.

[0010] As a further solution of the present utility model, installation grooves are formed on both sides of the connection shell. Second springs are fixedly connected in both installation grooves, and the second springs are fixed to the connecting blocks.

[0011] As a further solution of the present utility model, a positioning plate is fixedly connected to the bottom of the connection shell, and two installation holes are formed on one side of the positioning plate.

[0012] As a further solution of the present utility model, the rotating plate is in contact with the positioning rod and the connecting rod.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. By rotating the handle of the present utility model, the handle rotates to drive the worm to rotate. Under the action of the worm and the worm gear, the connecting shaft and the guide plate rotate, thereby adjusting the angle of the guide plate. When the bone conduction plate is in use, it is difficult to adjust the angle according to specific conditions and cannot meet the usage requirements of people.

[0015] 2. Through the combined use of the first spring, the positioning cylinder and the positioning rod of the present utility model, the operator operates the pressing plate. Under the action of the first spring, the positioning rod is inserted into the positioning cylinder, thereby positioning the guide plate and improving the stability of the guide plate during use.

[0016] 3. Through the combined use of the guide rod, the threaded rod and the limit frame of the present utility model, the limit frame contacts the outer shell of the oscillating saw to block the further penetration of the saw blade. Rotating the threaded rod makes the limit frame move, and the position of the limit frame can be adjusted to achieve precise control of the osteotomy depth. Description of the Drawings

[0017] Figure 1 It is a schematic front three-dimensional structure diagram of an ankle osteotomy guide plate assembly proposed by the present utility model;

[0018] Figure 2Partial enlarged schematic diagram of the positioning cylinder of an ankle osteotomy guide plate assembly proposed by the present utility model;

[0019] Figure 3 Internal schematic diagram of the connection shell of an ankle osteotomy guide plate assembly proposed by the present utility model;

[0020] Figure 4 Internal schematic diagram of the installation shell of an ankle osteotomy guide plate assembly proposed by the present utility model;

[0021] In the figure: 1. Limit frame; 2. Connection shell; 3. Positioning plate; 4. Threaded rod; 5. Guide plate; 6. Guide rod; 7. Slide block; 8. Connection shaft; 9. Installation shell; 10. Handle; 11. Positioning hole; 12. Positioning cylinder; 13. Positioning rod; 14. Pressure plate; 15. Worm gear; 16. Worm; 17. First spring; 18. Connecting rod; 19. Second spring; 20. Connecting block; 21. Positioning groove; 22. Rotating plate; 23. Square groove; 24. Installation groove. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Refer to Figures 1 - 4, an ankle osteotomy guide plate assembly, comprising a guide plate 5. A connecting shaft 8 is fixed to the bottom of the guide plate 5 by bolts. A connecting shell 2 is rotatably connected to the circumferential outer wall of the connecting shaft 8. One end of the connecting shaft 8 passes through the connecting shell 2 and is key-connected to a worm gear 15. A worm 16 is rotatably connected to one inner wall of the connecting shell 2, and the worm 16 meshes with the worm gear 15. One end of the worm 16 passes through the connecting shell 2 and is key-connected to a handle 10. A positioning cylinder 12 is fixed to the circumferential outer wall of the handle 10 by bolts. A plurality of positioning holes 11 are formed in the circumferential outer wall of the positioning cylinder 12. An installation shell 9 is fixed to one outer wall of the connecting shell 2 by bolts. A rotating plate 22 is rotatably connected between the two inner walls of the installation shell 9. Two connecting blocks 20 are slidably connected to one side of the installation shell 9. Square grooves 23 are formed at one ends of the two connecting blocks 20. Pressing plates 14 are welded to the tops of the two connecting blocks 20, and the pressing plates 14 slide relative to the installation shell 9. A first spring 17 is welded to the bottom of the pressing plate 14. A connecting rod 18 is welded to the bottom of the first spring 17. One end of the connecting rod 18 is fixed to a positioning rod 13 by bolts. One end of the connecting rod 18 is fixed to a positioning rod 13 by bolts, and the positioning rod 13 slides relative to the installation shell 9. When the angle of the guide plate 5 needs to be adjusted, the operator first squeezes the pressing plate 14, and the first spring 17 is compressed. The pressing plate 14 moves to drive the connecting block 20 to move. The connecting block 20 moves to drive the rotating plate 22 to rotate. The rotating plate 22 rotates to drive the positioning rod 13 to move. The positioning rod 13 moves to make the positioning rod 13 leave the positioning hole 11. Then the handle 10 is rotated. The handle 10 rotates to drive the worm 16 and the positioning cylinder 12 to rotate. The worm 16 rotates to drive the worm gear 15 to rotate. The worm gear 15 rotates to drive the connecting shaft 8 to rotate. The connecting shaft 8 rotates to drive the guide plate 5 to rotate, thereby adjusting the angle of the guide plate 5. After the adjustment is completed, the pressing plate 14 is released, and the first spring 17 resets to drive the connecting rod 18 and the positioning rod 13 to move. The positioning rod 13 is inserted into the positioning cylinder 12 to position the guide plate 5 with the adjusted angle.

[0024] One side of the guide plate 5 is rotatably connected with a threaded rod 4. The outer circumferential wall of the threaded rod 4 is threadedly connected with a limit frame 1. Both sides of the limit frame 1 are fixed with sliders 7 by bolts. One side of the guide plate 5 is fixed with two guide rods 6 by bolts, and the guide rods 6 are slidable with the sliders 7. The limit frame 1 contacts the housing of the swing saw and can block the deep penetration of the saw blade. The operator rotates the threaded rod 4 to make the limit frame 1 move along the guide rod 6, and can adjust the position of the limit frame 1, realizing the precise control of the osteotomy depth. Scale lines are provided on the outer circumferential walls of the two guide rods 6, and arrows are provided on one side of the two sliders 7. The operator can observe the scale lines and arrows to control the moving distance of the limit block each time, further improving the precise control of the osteotomy depth. Two positioning grooves 21 are opened on one side of the mounting shell 9. The bottoms of the two connecting blocks 20 are fixed with sliding rods by bolts, and the sliding rods are slidable with the positioning grooves 21. When the connecting block 20 moves, the sliding rod moves along the positioning groove 21, thereby guiding the connecting block 20 and improving the stability of the guide plate 5 during use. Mounting grooves 24 are opened on both sides of the connecting shell 2. Second springs 19 are welded in the two mounting grooves 24, and the second springs 19 are fixed with the connecting blocks 20. The two second springs 19 can share the elastic force of the first spring 17, thereby prolonging the service life of the guide plate 5. The bottom of the connecting shell 2 is fixed with a positioning plate 3 by bolts. Two mounting holes are opened on one side of the positioning plate 3. During osteotomy surgery, first use custom screws to implant into the medial tibia through the mounting holes, thereby fixing the positions of the positioning plate 3 and the guide plate 5. The rotating plate 22 contacts the positioning rod 13 and the connecting rod 18.

[0025] Working principle: During osteotomy surgery, first use custom screws to implant into the medial tibia through the mounting holes, thereby fixing the positions of the positioning plate 3 and the guide plate 5. When the angle of the guide plate 5 needs to be adjusted, the operator first squeezes the pressing plate 14, and the first spring 17 is compressed. The pressing plate 14 moves to drive the connecting block 20 to move. The connecting block 20 moves to drive the rotating plate 22 to rotate. The rotating plate 22 rotates to drive the positioning rod 13 to move. The positioning rod 13 moves to make the positioning rod 13 leave the positioning hole 11. Then rotate the handle 10. The handle 10 rotates to drive the worm 16 and the positioning cylinder 12 to rotate. The worm 16 rotates to drive the worm gear 15 to rotate. The worm gear 15 rotates to drive the connecting shaft 8 to rotate. The connecting shaft 8 rotates to drive the guide plate 5 to rotate, thereby adjusting the angle of the guide plate 5. After the adjustment is completed, release the pressing plate 14, and the first spring 17 resets to drive the connecting rod 18 and the positioning rod 13 to move. The positioning rod 13 abuts into the positioning cylinder 12, thereby positioning the guide plate 5 with the adjusted angle.

[0026] In addition, although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ankle osteotomy guide plate assembly, comprising a guide plate (5), characterized in that, A connecting shaft (8) is fixedly connected to the bottom of the guide plate (5). The outer circumferential wall of the connecting shaft (8) is rotatably connected to a connecting shell (2). One end of the connecting shaft (8) passes through the connecting shell (2) and is fixedly connected to a worm gear (15). A worm (16) is rotatably connected to one side inner wall of the connecting shell (2), and the worm (16) meshes with the worm gear (15). One end of the worm (16) passes through the connecting shell (2) and is fixedly connected to a handle (10). A positioning cylinder (12) is fixedly connected to the outer circumferential wall of the handle (10). A plurality of positioning holes (11) are formed in the outer circumferential wall of the positioning cylinder (12). An installation shell (9) is fixedly connected to one side outer wall of the connecting shell (2). A rotating plate (22) is rotatably connected between the two side inner walls of the installation shell (9). Two connecting blocks (20) are slidably connected to one side of the installation shell (9). Square grooves (23) are formed at one ends of the two connecting blocks (20). Pressing plates (14) are fixedly connected to the tops of the two connecting blocks (20), and the pressing plates (14) slide relative to the installation shell (9). A first spring (17) is fixedly connected to the bottom of the pressing plate (14). The bottom of the first spring (17) is fixedly connected to a connecting rod (18). One end of the connecting rod (18) is fixedly connected to a positioning rod (13), and the connecting rod (18) is fixedly connected to a positioning rod (13) at one end, and the positioning rod (13) slides relative to the installation shell (9).

2. The ankle osteotomy guide plate assembly according to claim 1, wherein A threaded rod (4) is rotatably connected to one side of the guide plate (5). A limiting frame (1) is threadedly connected to the outer circumferential wall of the threaded rod (4). Sliders (7) are fixedly connected to both sides of the limiting frame (1). Two guide rods (6) are fixedly connected to one side of the guide plate (5), and the guide rods (6) slide relative to the sliders (7).

3. The ankle osteotomy guide plate assembly according to claim 2, characterized in that, Scale lines are provided on the outer circumferential walls of the two guide rods (6). Arrows are provided on one side of each of the two sliders (7).

4. The ankle osteotomy guide plate assembly according to claim 1, wherein Two positioning grooves (21) are formed in one side of the installation shell (9). Slide rods are fixedly connected to the bottoms of the two connecting blocks (20), and the slide rods slide relative to the positioning grooves (21).

5. The ankle osteotomy guide plate assembly according to claim 1, wherein Installation grooves (24) are formed in both sides of the connecting shell (2). Second springs (19) are fixedly connected in the two installation grooves (24), and the second springs (19) are fixed to the connecting blocks (20).

6. The ankle osteotomy guide plate assembly according to claim 1, characterized in that, A positioning plate (3) is fixedly connected to the bottom of the connecting shell (2). Two installation holes are formed in one side of the positioning plate (3).

7. The ankle osteotomy guide plate assembly according to claim 6, characterized in that, The rotating plate (22) contacts the positioning rod (13) and the connecting rod (18).

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