A tibial external frame

Abstract

The present invention discloses a tibial external frame, including an ankle hugger, a rack is provided on one side of the ankle hugger, a sleeve is provided on the upper end of the rack, the rack and the sleeve are connected by a transverse locking mechanism, a vertical rod is provided in the sleeve, the upper end of the vertical rod passes through the sleeve, the sleeve and the vertical rod are fixed by a vertical locking mechanism, an osteotomy block locking mechanism is provided on the vertical rod, an osteotomy block is provided on one side of the osteotomy block locking mechanism, the tibial external frame disclosed by the present invention can be selected with or without a transverse bridge, and the transverse locking mechanism, the vertical locking mechanism and the osteotomy block locking mechanism cooperate with each other to position the osteotomy block at a fairly precise osteotomy position, and the amount of osteotomy can be accurately determined.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a tibial external frame. Background Art

[0002] Artificial knee replacement surgery has become one of the conventional treatment methods for knee joint diseases. Artificial knee replacement surgery is used to treat osteonecrosis, comminuted fractures and dislocations that cannot be reduced, pain and movement disorders. It has become one of the conventional treatment methods for knee joint diseases. In artificial knee replacement surgery, it is first necessary to perform osteotomy on the upper end of the tibia to obtain a tibial platform for installing an artificial prosthesis. The current method makes it impossible to accurately position the osteotomy block and is cumbersome to use. The present invention discloses a tibial external frame for solving the above problems. Summary of the invention

[0003] The object of the present invention is to provide a tibial external frame to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a tibial external frame, including an ankle hugger, which is used to hug the ankle and preliminarily fix the tibial external frame and the human tibia, which belongs to the prior art. A rack is provided on one side of the ankle hugger, and one end of the rack is fixedly connected to the ankle hugger. The teeth of the rack are located at the lower part, and a sleeve is provided at the upper end of the rack. The sleeve is hollow inside. The rack and the sleeve are connected by a transverse locking mechanism, and the transverse locking mechanism can also adjust the relative position of the rack and the sleeve, so as to adjust the position of the sleeve away from the tibia. A vertical rod is provided in the sleeve. The vertical rod can slide vertically up and down in the sleeve, and the upper end of the vertical rod passes through the sleeve. The sleeve and the vertical rod are fixed by a vertical locking mechanism. The vertical locking mechanism is also used to adjust the overall length of the sleeve and the vertical rod to adapt to tibias of different lengths. An osteotomy block locking mechanism is provided on the vertical rod, and the osteotomy block locking mechanism is used to lock the osteotomy block so that the osteotomy block is in the osteotomy position. An osteotomy block is provided on one side of the osteotomy block locking mechanism, and the osteotomy block is used to accurately determine the position of the osteotomy. After the position of the osteotomy block is determined, a tool can be inserted into the through hole of the osteotomy block to perform osteotomy.

[0005] Preferably, a cross bridge is provided at the upper end of the vertical rod, and the cross bridge is fixed on the tibia by knocking when in use, so as to improve the stability of the tibial external frame and assist in measuring the force line. A waist-shaped hole is provided on one side, and a cross bridge extractor is provided in the waist-shaped hole. After the osteotomy is completed, the waist-shaped hole and the cross bridge extractor are used to assist in removing the cross bridge.

[0006] Preferably, the transverse locking mechanism includes an adjusting block, a compression twist, a spring, a transverse pin, a waist-shaped hole, and a column pin. The rack is sleeved with an adjusting block, and the adjusting block can slide along the rack. The upper end of the adjusting block is provided with a compression twist, and the compression twist passes through the adjusting block. The middle part of the compression twist is sleeved with a spring, and the lower end of the compression twist is sleeved on the rack. The lower end of the compression twist is also provided with a transverse pin, and the teeth of the transverse pin and the rack are engaged. Under the bite of the transverse pin and the rack and the pressing action of the spring, the relative position of the rack and the sleeve is locked, and the side wall of the compression twist A waist-shaped hole is provided, and a pin is provided at the position corresponding to the adjusting block and the waist-shaped hole, and the pin is inserted into the waist-shaped hole. The waist-shaped hole and the pin are used to limit the downward displacement of the compression torsion and protect the spring from plastic deformation. One side of the upper end of the adjusting block is fixedly connected to the sleeve. When the relative position of the rack and the sleeve needs to be adjusted, the compression torsion is pressed, the spring is compressed, and the bite effect of the cross pin and the rack disappears. The rack can be pulled for adjustment. After the adjustment is completed, the compression torsion is reset by the spring, and the cross pin and the rack are re-engaged to lock the relative position of the rack and the sleeve.

[0007] Preferably, the vertical locking mechanism includes a solid block, a knob, and a screw. The solid block is sleeved on the vertical rod, the lower end of the solid block is fixedly connected to the sleeve, a knob is provided on one side of the solid block, and a screw is provided on the end of the knob close to the solid block. The knob and the screw are fixedly connected, and the screw penetrates into the solid block to contact the vertical rod. Under the pressing action of the screw, the relative position of the vertical rod and the sleeve is locked. When the relative position of the vertical rod and the sleeve needs to be adjusted, the spiral screw can be used.

[0008] Preferably, the osteotomy block locking mechanism comprises a compression block, a button buckle, a second spring, a hook, a connecting column, a slot, and a column hole. The vertical rod is provided with a compression block, the upper end of the compression block is provided with a button buckle, a second spring is provided at the lower end of one side of the button buckle, the second spring is fixed to the compression block, the lower middle end of the button buckle is hinged to the compression block, the other side of the button buckle is provided with a hook, the end of the compression block close to the osteotomy block is provided with a connecting column, the connecting column has two, and the osteotomy block A slot is provided at a position corresponding to the hook, and a column hole is provided at a position corresponding to the osteotomy block and the connecting column. The hook and the slot are engaged with each other, and the two connecting columns are inserted into the column holes to form a three-point fixation, which fixes the osteotomy block very firmly. When the osteotomy block needs to be removed after the osteotomy is completed, the button buckle is pressed, the No. 2 spring is compressed, the hook is tilted, the engaging effect of the hook and the slot disappears, and the locking effect of the osteotomy block locking mechanism on the osteotomy block disappears. After the osteotomy block is removed, the button buckle is reset under the rebound effect of the No. 2 spring.

[0009] Preferably, a vertical through hole is provided in the middle of the vertical rod, and the button buckle passes through the vertical through hole, and the osteotomy block locking mechanism can move up and down along the vertical through hole, and a No. 2 knob is provided on one side of the compression block, and a No. 2 screw is provided on the side of the No. 2 knob close to the compression block, and one end of the No. 2 screw is fixed on the No. 2 knob, and the No. 2 screw passes through the compression block and contacts the vertical rod, and under the pressing action of the No. 2 screw, the relative position of the osteotomy block locking mechanism and the vertical rod can be locked. When the relative position of the osteotomy block locking mechanism and the vertical rod needs to be adjusted, the No. 2 screw can be rotated, so that after the cross bridge is fixed to the tibia, the upper and lower positions of the osteotomy block can still be adjusted, and the osteotomy position is further accurately determined. At the same time, if an error occurs when fixing the cross bridge, the error can be adjusted.

[0010] Preferably, a slide groove is provided on the cross bridge, and a slider is provided on the upper end of the vertical rod, and the slider is located in the slide groove, and the slide groove has a certain pressing effect on the slider, so that the sliding of the slider and the slide groove relative to each other has a certain sliding resistance, and a knob handle is provided on the upper end of the slider, and the knob handle is fixed on the slider, and is used for holding to adjust the relative position of the cross bridge and the tibia, one end of the slide groove passes through the cross bridge, and the slide groove has a certain pressing force on the slider, and a pin is provided on the lower side of the end of the cross bridge away from the slide groove, and the pin is driven into the tibia to improve the stability of the tibial frame.

[0011] Preferably, a through groove is provided on the side wall of the cross bridge, the waist-shaped hole and the through groove are connected, and a waist-shaped protrusion is provided at the lower end of the cross bridge extractor. When the cross bridge needs to be removed, the cross bridge extractor is inserted into the waist-shaped hole, and then the cross bridge extractor is rotated at a certain angle so that the waist-shaped protrusion is inserted into the through groove, and an upward force is applied to the cross bridge extractor to pull the pin out of the tibia.

[0012] Preferably, the osteotomy block includes a left osteotomy block, a right osteotomy block and a symmetrical osteotomy block. During osteotomy, the left osteotomy block, the right osteotomy block or the symmetrical osteotomy block can be selected according to the amount of tibial defect.

[0013] Preferably, a positioning hole is provided at the lower part of the osteotomy block, and a positioning nail is passed through the positioning hole to fix the osteotomy block to the tibial osteotomy, thereby ensuring the posterior tilt angle of the osteotomy block, making the osteotomy conform to the force line angle, and making the bone setting amount more accurate.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0015] 1. The tibial external frame disclosed in the present invention has a lateral locking mechanism that can adjust the relative position of the rack and the sleeve, thereby adjusting the position of the sleeve from the tibia, a vertical locking mechanism that is used to adjust the overall length of the sleeve and the vertical rod to adapt to tibias of different lengths, and an osteotomy block locking mechanism that is used to lock the osteotomy block, and different osteotomy blocks can be replaced according to the amount of tibial defect, so that the osteotomy block is accurately located at the osteotomy position, and the amount of osteotomy is accurate;

[0016] 2. The tibial external frame disclosed in the present invention can be selected with or without a cross bridge, and the tibial external frame with a cross bridge is fixed on the tibia by knocking when in use, thereby improving the stability of the tibial external frame, and can assist in measuring the force line, and is equipped with an external frame extractor to facilitate the removal of the external frame;

[0017] 3. The hook and the slot disclosed in the present invention are connected to each other, and the two connecting columns are inserted into the column holes to form a three-point fixation, which can fix the osteotomy block very firmly;

[0018] 4. The tibial external frame with a cross bridge can still adjust the upper and lower positions of the osteotomy block after the cross bridge is fixed to the tibia, further accurately determining the osteotomy position. At the same time, if an error occurs when fixing the cross bridge, the error can be adjusted;

[0019] 5. A positioning hole is provided at the bottom of the osteotomy block, through which a positioning pin is inserted to fix the osteotomy block to the tibial osteotomy, ensuring a 3° posterior tilt angle of the osteotomy block, so that the osteotomy conforms to the force line and the amount of bone grafting is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a front view of a first embodiment of a tibial external frame of the present invention;

[0022] Figure 2 It is a front view of a second tibial external frame solution of the present invention;

[0023] Figure 3 is a cross-sectional view of the transverse locking mechanism of the present invention;

[0024] Figure 4 is a front view of the vertical locking mechanism of the present invention;

[0025] Figure 5 is a stereoscopic diagram of the osteotomy block locking mechanism of the present invention;

[0026] Figure 6 It is a stereoscopic diagram of the No. 2 knob, No. 2 screw, etc. of the present invention;

[0027] Figure 7 is a three-dimensional diagram of the cross bridge of the present invention;

[0028] Figure 8 is a front view of the cross-bridge extractor of the present invention;

[0029] Fig. 9 is a stereoscopic view of the left osteotomy block of the present invention;

[0030] Fig.10 is a stereoscopic view of the right osteotomy block of the present invention;

[0031] Fig.11 is a stereoscopic view of a symmetrical osteotomy block of the present invention;

[0032] In the figure: 1, ankle hugger; 2, rack; 3, sleeve; 4, horizontal locking mechanism; 5, vertical rod; 6, vertical locking mechanism; 7, osteotomy block locking mechanism; 8, osteotomy block; 9, cross bridge; 10, waist-shaped hole; 11, cross bridge extractor; 12, adjustment block; 13, compression and twisting; 14, spring; 15, cross pin; 16, waist-shaped hole; 17, column pin; 18, fixing block; 19, knob; 20, screw; 21, compression and fixing Block; 22, button buckle; 23, No. 2 spring; 24, hook; 25, connecting column; 26, slot; 27, column hole; 28, vertical through hole; 29, No. 2 knob; 30, No. 2 screw; 31, slide groove; 32, slider; 33, knob handle; 34, pin; 35, positioning hole; 36, through groove; 37, waist-shaped convex block; 38, left osteotomy block; 39, right osteotomy block; 40, symmetrical osteotomy block. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1: The present invention provides a solution 1 of a tibial external frame, such as Figure 1 , including an ankle hugger 1, which is used to hug the ankle and preliminarily fix the tibial frame and the human tibia, which belongs to the prior art. A rack 2 is arranged on one side of the ankle hugger 1, and one end of the rack 2 is fixedly connected to the ankle hugger 1. The teeth of the rack 2 are located at the lower part, and a sleeve 3 is arranged on the upper end of the rack 2. The sleeve 3 is hollow inside. The rack 2 and the sleeve 3 are connected by a transverse locking mechanism 4. The transverse locking mechanism 4 can also adjust the relative position of the rack 2 and the sleeve 3, so as to adjust the position of the sleeve 3 away from the tibia. A vertical rod 5 is arranged in the sleeve 3, and the vertical rod 5 can slide vertically up and down in the sleeve 3. The upper end of the vertical rod 5 passes through the sleeve 3, and the sleeve 3 and the vertical rod 5 are fixed by a vertical locking mechanism 6. The vertical locking mechanism 6 is also used to adjust the overall length of the sleeve 3 and the vertical rod 5 to adapt to tibias of different lengths. An osteotomy block locking mechanism 7 is provided on the vertical rod 5. The osteotomy block locking mechanism 7 is used to lock the osteotomy block 8 so that the osteotomy block 8 is in the osteotomy position. An osteotomy block 8 is provided on one side of the osteotomy block locking mechanism 7. The osteotomy block 8 is used to accurately determine the position of the osteotomy. After the position of the osteotomy block 8 is determined, a tool can be inserted into the through hole of the osteotomy block 8 to perform osteotomy.

[0035] like Figure 3 The lateral locking mechanism 4 includes an adjusting block 12, a compression twist 13, a spring 14, a transverse pin 15, a waist-shaped hole 16, and a column pin 17. The adjusting block 12 is sleeved on the rack 2, and the adjusting block 12 can slide along the rack 2. A compression twist 13 is provided at the upper end of the adjusting block 12, and the compression twist 13 passes through the adjusting block 12. A spring 14 is sleeved in the middle of the compression twist 13. The lower end of the compression twist 13 is sleeved on the rack 2. A transverse pin 15 is also provided at the lower end of the compression twist 13. The transverse pin 15 and the teeth of the rack 2 are engaged. Under the bite action of the transverse pin 15 and the rack 2 and the pressing action of the spring 14, the relative position of the rack 2 and the sleeve 3 is locked. The side wall of the compression twist 13 is provided with The waist-shaped hole 16, the adjustment block 12 and the waist-shaped hole 16 are provided with a pin 17 at the corresponding position, and the pin 17 is inserted into the waist-shaped hole 16. The waist-shaped hole 16 and the pin 17 are used to limit the downward displacement of the pressure twist 13 to protect the spring from plastic deformation. One side of the upper end of the adjustment block 12 is fixedly connected to the sleeve 3. When the relative position of the rack 2 and the sleeve 3 needs to be adjusted, the pressure twist 13 is pressed, the spring 14 is compressed, and the bite effect of the cross pin 15 and the rack 2 disappears. The rack 2 can be pulled for adjustment. After the adjustment is completed, the pressure twist 13 is reset by the spring 14, and the cross pin 15 and the rack 2 are re-engaged to lock the relative position of the rack 2 and the sleeve 3.

[0036] like Figure 4 The vertical locking mechanism 6 includes a solid block 18, a knob 19, and a screw 20. The solid block 18 is sleeved on the vertical rod 5. The lower end of the solid block 18 is fixedly connected to the sleeve 3. A knob 19 is provided on one side of the solid block 18. A screw 20 is provided on the end of the knob 19 close to the solid block 18. The knob 19 and the screw 20 are fixedly connected. The screw 20 penetrates into the solid block 18 and contacts the vertical rod 5. Under the pressing action of the screw 20, the relative position of the vertical rod 5 and the sleeve 3 is locked. When the relative position of the vertical rod 5 and the sleeve 3 needs to be adjusted, the spiral screw 20 can be used.

[0037] like Figure 5 , 911, the osteotomy block locking mechanism 7 includes a compression block 21, a button buckle 22, a second spring 23, a hook 24, a connecting column 25, a slot 26, and a column hole 27. The vertical rod 5 is provided with a compression block 21, the upper end of the compression block 21 is provided with a button buckle 22, and the lower end of one side of the button buckle 22 is provided with a second spring 23, and the second spring 23 is fixed to the compression block 21. The lower end of the middle part of the button buckle 22 is hinged to the compression block 21, and the other side of the button buckle 22 is provided with a hook 24. The end of the compression block 21 close to the osteotomy block 8 is provided with a connecting column 25, and the connecting column 25 has two, and the osteotomy block 8 and the hook A slot 26 is provided at the position corresponding to 24, and a column hole 27 is provided at the position corresponding to the osteotomy block 8 and the connecting column 25. The hook 24 and the slot 26 are engaged with each other, and the two connecting columns 25 are inserted into the column holes 27 to form a three-point fixation, which fixes the osteotomy block 8 very firmly. When the osteotomy block 8 needs to be removed after the osteotomy is completed, the button buckle 22 is pressed, the second spring 23 is compressed, the hook 24 is tilted, the engaging effect of the hook 24 and the slot 26 disappears, and the locking effect of the osteotomy block locking mechanism 7 on the osteotomy block 8 disappears. After the osteotomy block 8 is removed, the button buckle 22 is reset under the rebound effect of the second spring 23.

[0038] like Figures 9-11 The osteotomy block 8 includes a left osteotomy block 38, a right osteotomy block 39 and a symmetrical osteotomy block 40. During osteotomy, the left osteotomy block 38, the right osteotomy block 39 or the symmetrical osteotomy block 40 can be selected according to the amount of tibial defect.

[0039] like Figures 9-11 A positioning hole 35 is provided at the lower part of the osteotomy block 8, and a positioning nail is passed through the positioning hole 35 to fix the osteotomy block 8 to the tibial osteotomy, ensuring a 3° posterior tilt angle of the osteotomy block, so that the osteotomy conforms to the force line and the amount of bone setting is more accurate.

[0040] Embodiment 2: The present invention provides a second solution of a tibial external frame, such as Figure 2, including an ankle hugger 1, which is used to hug the ankle and preliminarily fix the tibial frame and the human tibia, which belongs to the prior art. A rack 2 is arranged on one side of the ankle hugger 1, and one end of the rack 2 is fixedly connected to the ankle hugger 1. The teeth of the rack 2 are located at the lower part, and a sleeve 3 is arranged on the upper end of the rack 2. The sleeve 3 is hollow inside. The rack 2 and the sleeve 3 are connected by a transverse locking mechanism 4. The transverse locking mechanism 4 can also adjust the relative position of the rack 2 and the sleeve 3, so as to adjust the position of the sleeve 3 away from the tibia. A vertical rod 5 is arranged in the sleeve 3, and the vertical rod 5 can slide vertically up and down in the sleeve 3. The upper end of the vertical rod 5 passes through the sleeve 3, and the sleeve 3 and the vertical rod 5 are fixed by a vertical locking mechanism 6. The vertical locking mechanism 6 is also used to adjust the overall length of the sleeve 3 and the vertical rod 5 to adapt to tibias of different lengths. An osteotomy block locking mechanism 7 is provided on the vertical rod 5. The osteotomy block locking mechanism 7 is used to lock the osteotomy block 8 so that the osteotomy block 8 is in the osteotomy position. An osteotomy block 8 is provided on one side of the osteotomy block locking mechanism 7. The osteotomy block 8 is used to accurately determine the position of the osteotomy. After the position of the osteotomy block 8 is determined, a tool can be inserted into the through hole of the osteotomy block 8 to perform osteotomy.

[0041] like Figure 2 , 7 A cross bridge 9 is provided at the upper end of the vertical rod 5. The cross bridge 9 is fixed on the tibia by knocking when in use, which is used to improve the stability of the tibial external frame and assist in measuring the force line. A waist-shaped hole 10 is provided on one side, and a cross bridge extractor 11 is provided in the waist-shaped hole 10. After the osteotomy is completed, the waist-shaped hole 10 and the cross bridge extractor 11 are used to assist in removing the cross bridge 9.

[0042] like Figure 3 The lateral locking mechanism 4 includes an adjusting block 12, a compression twist 13, a spring 14, a transverse pin 15, a waist-shaped hole 16, and a column pin 17. The adjusting block 12 is sleeved on the rack 2, and the adjusting block 12 can slide along the rack 2. A compression twist 13 is provided at the upper end of the adjusting block 12, and the compression twist 13 passes through the adjusting block 12. A spring 14 is sleeved in the middle of the compression twist 13. The lower end of the compression twist 13 is sleeved on the rack 2. A transverse pin 15 is also provided at the lower end of the compression twist 13. The transverse pin 15 and the teeth of the rack 2 are engaged. Under the bite action of the transverse pin 15 and the rack 2 and the pressing action of the spring 14, the relative position of the rack 2 and the sleeve 3 is locked. The side wall of the compression twist 13 is provided with The waist-shaped hole 16, the adjustment block 12 and the waist-shaped hole 16 are provided with a pin 17 at the corresponding position, and the pin 17 is inserted into the waist-shaped hole 16. The waist-shaped hole 16 and the pin 17 are used to limit the downward displacement of the pressure twist 13 to protect the spring from plastic deformation. One side of the upper end of the adjustment block 12 is fixedly connected to the sleeve 3. When the relative position of the rack 2 and the sleeve 3 needs to be adjusted, the pressure twist 13 is pressed, the spring 14 is compressed, and the bite effect of the cross pin 15 and the rack 2 disappears. The rack 2 can be pulled for adjustment. After the adjustment is completed, the pressure twist 13 is reset by the spring 14, and the cross pin 15 and the rack 2 are re-engaged to lock the relative position of the rack 2 and the sleeve 3.

[0043] like Figure 4 The vertical locking mechanism 6 includes a solid block 18, a knob 19, and a screw 20. The solid block 18 is sleeved on the vertical rod 5. The lower end of the solid block 18 is fixedly connected to the sleeve 3. A knob 19 is provided on one side of the solid block 18. A screw 20 is provided on the end of the knob 19 close to the solid block 18. The knob 19 and the screw 20 are fixedly connected. The screw 20 penetrates into the solid block 18 and contacts the vertical rod 5. Under the pressing action of the screw 20, the relative position of the vertical rod 5 and the sleeve 3 is locked. When the relative position of the vertical rod 5 and the sleeve 3 needs to be adjusted, the spiral screw 20 can be used.

[0044] like Figure 5 , 9 11, the osteotomy block locking mechanism 7 includes a compression block 21, a button buckle 22, a second spring 23, a hook 24, a connecting column 25, a slot 26, and a column hole 27. The vertical rod 5 is provided with a compression block 21, the upper end of the compression block 21 is provided with a button buckle 22, and the lower end of one side of the button buckle 22 is provided with a second spring 23, and the second spring 23 is fixed to the compression block 21. The lower end of the middle part of the button buckle 22 is hinged to the compression block 21, and the other side of the button buckle 22 is provided with a hook 24. The end of the compression block 21 close to the osteotomy block 8 is provided with a connecting column 25, and the connecting column 25 has two, and the osteotomy block 8 and the hook A slot 26 is provided at the position corresponding to 24, and a column hole 27 is provided at the position corresponding to the osteotomy block 8 and the connecting column 25. The hook 24 and the slot 26 are engaged with each other, and the two connecting columns 25 are inserted into the column holes 27 to form a three-point fixation, which fixes the osteotomy block 8 very firmly. When the osteotomy block 8 needs to be removed after the osteotomy is completed, the button buckle 22 is pressed, the second spring 23 is compressed, the hook 24 is tilted, the engaging effect of the hook 24 and the slot 26 disappears, and the locking effect of the osteotomy block locking mechanism 7 on the osteotomy block 8 disappears. After the osteotomy block 8 is removed, the button buckle 22 is reset under the rebound effect of the second spring 23.

[0045] like Figure 6 A vertical through hole 28 is provided in the middle of the vertical rod 5, and the button buckle 22 passes through the vertical through hole 28. The osteotomy block locking mechanism 7 can move up and down along the vertical through hole 28. A No. 2 knob 29 is provided on one side of the compression block 21, and a No. 2 screw 30 is provided on the side of the No. 2 knob 29 close to the compression block 21. One end of the No. 2 screw 30 is fixed on the No. 2 knob 29, and the No. 2 screw 30 passes through the compression block 21 and contacts the vertical rod 5. Under the pressing action of the No. 2 screw 30, the relative position of the osteotomy block locking mechanism 7 and the vertical rod 5 can be locked. When the relative position of the osteotomy block locking mechanism 7 and the vertical rod 5 needs to be adjusted, the No. 2 screw 30 can be rotated, so that after the cross bridge 9 is fixed to the tibia, the upper and lower positions of the osteotomy block 8 can still be adjusted, and the osteotomy position is further accurately determined. At the same time, if an error occurs when fixing the cross bridge 9, the error can be adjusted.

[0046] like Figure 7A slide groove 31 is provided on the cross bridge 9, and a slider 32 is provided on the upper end of the vertical rod 5. The slider 32 is located in the slide groove 31. The slide groove 31 has a certain pressing effect on the slider 32, so that the sliding of the slider 32 and the slide groove 31 relative to each other has a certain sliding resistance. A knob handle 33 is provided on the upper end of the slider 32, and the knob handle 33 is fixed on the slider 32 for holding and adjusting the relative position of the cross bridge 9 and the tibia, and at the same time can fix the relative position of the vertical rod 5 and the cross bridge 9. One end of the slide groove 31 passes through the cross bridge 9, so that the vertical rod 5 can be disassembled along the slide groove 31. The slide groove 31 has a certain pressing force on the slider 32, and a pin 34 is provided on the lower side of the end of the cross bridge 9 away from the slide groove 31. The pin 34 is driven into the tibia to improve the stability of the tibial frame.

[0047] like Figures 7-8 A through groove 36 is provided on the side wall of the cross bridge 9, and the waist-shaped hole 10 is connected to the through groove 36. A waist-shaped protrusion 37 is provided at the lower end of the cross bridge extractor 11. When the cross bridge 9 needs to be removed, the cross bridge extractor 11 is inserted into the waist-shaped hole 10, and then the cross bridge extractor 11 is rotated at a certain angle so that the waist-shaped protrusion 37 is inserted into the through groove 36, and an upward force is applied to the cross bridge extractor 11 to pull the pin 34 out of the tibia.

[0048] like Figures 9-11 The osteotomy block 8 includes a left osteotomy block 38, a right osteotomy block 39 and a symmetrical osteotomy block 40. During osteotomy, the left osteotomy block 38, the right osteotomy block 39 or the symmetrical osteotomy block 40 can be selected according to the amount of tibial defect.

[0049] like Figures 9-11 A positioning hole 35 is provided at the lower part of the osteotomy block 8, and a positioning nail is passed through the positioning hole 35 to fix the osteotomy block 8 to the tibial osteotomy, ensuring a 3° posterior tilt angle of the osteotomy block, so that the osteotomy conforms to the force line and the amount of bone setting is more accurate.

[0050] The working principle of scheme 1 is as follows: firstly, a suitable osteotomy block 8 is selected, and the osteotomy block locking mechanism 7 is used to lock the osteotomy block 8, and then the ankle is held with the ankle holding device 1 to preliminarily fix the tibial external frame and the human tibia, and then the relative position of the rack 2 and the sleeve 3 is adjusted using the transverse locking mechanism 4, that is, the position of the sleeve 3 from the tibia is adjusted, and then the overall length of the sleeve 3 and the vertical rod 5 is adjusted using the vertical locking mechanism 6, that is, to adapt to tibias of different lengths, and the osteotomy block 8 is placed in the accurate osteotomy position, and finally a tool is inserted into the through hole of the osteotomy block 8 to perform osteotomy;

[0051] The working principle of the scheme 1 is as follows: firstly, a suitable osteotomy block 8 is selected, and the osteotomy block locking mechanism 7 is used to lock the osteotomy block 8, and then the ankle is held with the ankle holding device 1 to preliminarily fix the tibial external frame and the human tibia, and then the relative position of the rack 2 and the sleeve 3 is adjusted using the transverse locking mechanism 4, that is, the position of the sleeve 3 from the tibia is adjusted, and then the vertical locking mechanism 6 is used to adjust the overall length of the sleeve 3 and the vertical rod 5, and the cross bridge 9 is fixed on the tibia, and then the second screw 30 is rotated to adjust the upper and lower positions of the osteotomy block 8, so that the osteotomy block 8 is placed in the accurate osteotomy position, and finally a tool is inserted into the through hole of the osteotomy block 8 to perform osteotomy;

[0052] The principle of the osteotomy block locking mechanism 7 is as follows: the hook 24 and the slot 26 are engaged with each other, and the two connecting columns 25 are inserted into the column holes 27 to form a three-point fixation, which fixes the osteotomy block 8 very firmly. When the osteotomy block 8 needs to be removed after the osteotomy is completed, the button buckle 22 is pressed, the No. 2 spring 23 is compressed, the hook 24 is tilted, the engaging effect of the hook 24 and the slot 26 disappears, and the locking effect of the osteotomy block locking mechanism 7 on the osteotomy block 8 disappears. After the osteotomy block 8 is removed, the button buckle 22 is reset under the rebound effect of the No. 2 spring 23.

[0053] The principle of the transverse locking mechanism 4 is: pressing the pressing knob 13, the spring 14 is compressed, the bite effect of the transverse pin 15 and the rack 2 disappears, and the rack 2 can be adjusted by pulling it. After the adjustment is completed, the pressing knob 13 is driven by the spring 14 to reset, the transverse pin 15 and the rack 2 are re-engaged, and the relative position of the rack 2 and the sleeve 3 is locked;

[0054] The principle of the vertical locking mechanism 6 is that the spiral screw 20 can adjust the relative position of the vertical rod 5 and the sleeve 3.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tibial external frame, characterized in that: The ankle embracing device (1) comprises an ankle embracing device (1), wherein a rack (2) is arranged on one side of the ankle embracing device (1), a sleeve (3) is arranged on the upper end of the rack (2), the rack (2) and the sleeve (3) are connected via a transverse locking mechanism (4), a vertical rod (5) is arranged inside the sleeve (3), the upper end of the vertical rod (5) passes through the sleeve (3), the sleeve (3) and the vertical rod (5) are fixed via a vertical locking mechanism (6), an osteotomy block locking mechanism (7) is arranged on the vertical rod (5), and an osteotomy block (8) is arranged on one side of the osteotomy block locking mechanism (7); The osteotomy block locking mechanism (7) comprises a compression block (21), a button buckle (22), a second spring (23), a hook (24), a connecting column (25), a slot (26), and a column hole (27). The vertical rod (5) is provided with a compression block (21), the upper end of the compression block (21) is provided with a button buckle (22), the lower end of one side of the button buckle (22) is provided with a second spring (23), the lower end of the middle part of the button buckle (22) is hinged to the compression block (21), the other side of the button buckle (22) is provided with a hook (24), the end of the compression block (21) close to the osteotomy block (8) is provided with a connecting column (25), the connecting column (25) has two, the positions of the osteotomy block (8) and the hook (24) are provided with a slot (26), and the positions of the osteotomy block (8) and the connecting column (25) are provided with a column hole (27); A cross bridge (9) is arranged at the upper end of the vertical rod (5), a waist-shaped hole (10) is arranged on one side of the cross bridge (9), a cross bridge extractor (11) is arranged in the waist-shaped hole (10), a through groove (36) is arranged on the side wall of the cross bridge (9), the waist-shaped hole (10) and the through groove (36) are connected, and a waist-shaped protrusion (37) is arranged at the lower end of the cross bridge extractor (11); The cross bridge (9) is provided with a slide groove (31), the upper end of the vertical rod (5) is provided with a slider (32), the slider (32) is located in the slide groove (31), the upper end of the slider (32) is provided with a knob handle (33), one end of the slide groove (31) passes through the cross bridge (9), and a pin (34) is provided on the lower side of one end of the cross bridge (9) away from the slide groove (31).

2. The tibial external frame according to claim 1, characterized in that: The transverse locking mechanism (4) comprises an adjusting block (12), a pressing twist (13), a spring (14), a transverse pin (15), a waist-shaped hole (16), and a column pin (17); the adjusting block (12) is sleeved on the rack (2); the adjusting block (12) can slide along the rack (2); a pressing twist (13) is arranged on the upper end of the adjusting block (12); the pressing twist (13) passes through the adjusting block (12); a spring (14) is sleeved in the middle of the pressing twist (13); The lower end of the pressing twist (13) is sleeved on the rack (2), and a transverse pin (15) is also provided at the lower end of the pressing twist (13). The transverse pin (15) and the teeth of the rack (2) are engaged with each other. A waist-shaped hole (16) is provided on the side wall of the pressing twist (13). A column pin (17) is provided at a position corresponding to the waist-shaped hole (16) of the adjusting block (12). The column pin (17) is inserted into the waist-shaped hole (16). One side of the upper end of the adjusting block (12) is fixedly connected to the sleeve (3).

3. The tibial external frame according to claim 1, characterized in that: The vertical locking mechanism (6) comprises a solid block (18), a knob (19), and a screw (20); the solid block (18) is sleeved on the vertical rod (5); the lower end of the solid block (18) is fixedly connected to the sleeve (3); a knob (19) is provided on one side of the solid block (18); a screw (20) is provided at one end of the knob (19) close to the solid block (18); the screw (20) penetrates into the solid block (18) and contacts the vertical rod (5).

4. The tibial external frame according to claim 1, characterized in that: A vertical through hole (28) is provided in the middle of the vertical rod (5), and the button buckle (22) passes through the vertical through hole (28). A second knob (29) is provided on one side of the compression block (21), and a second screw (30) is provided on the side of the second knob (29) close to the compression block (21), and the second screw (30) passes through the compression block (21) and contacts the vertical rod (5).

5. The tibial external frame according to claim 1, characterized in that: The osteotomy block (8) comprises a left osteotomy block (38), a right osteotomy block (39) and a symmetrical osteotomy block (40).

6. The tibial external frame according to claim 1, characterized in that: A positioning hole (35) is provided at the lower part of the osteotomy block (8).

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