Ankle holding device for knee joint surgery

Abstract

The present application relates to the field of medical devices, and in particular to an ankle cradle for knee joint surgery, comprising a mounting seat and a bracket slidably connected to one end of the mounting seat, the bracket forming an embedding space for the ankle joint to be embedded on a side away from the mounting seat, two ankle cradle plates are hinged on a side of the bracket away from the mounting seat, the two ankle cradle plates are respectively located on opposite sides of the embedding space, and a pulling component for pulling the end of the ankle cradle away from the bracket to rotate toward the embedding space to clamp the human ankle joint is provided between each ankle cradle plate and the bracket. The present application has the effect of reducing the sliding of the ankle cradle on the human ankle joint and ensuring the stability of the ankle cradle installation.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an ankle cradle for knee joint surgery. Background Art

[0002] During knee replacement surgery, before tibial osteotomy, the tibial force line needs to be located first. Currently, there are two main methods for tibial force line location: intramedullary location and extramedullary location.

[0003] Among them, the instruments used for extramedullary positioning mainly include a nail handle, an ankle hugger, and a force line rod used to connect the nail handle and the ankle hugger. When in use, the ankle hugger is directly clamped at the human ankle joint, and then the length of the force line rod is adjusted, and the nail on the nail handle is locked in the position of the tibial osteotomy plate. The position of the tibial osteotomy plate can be fixed, which is convenient for subsequent osteotomy work.

[0004] However, during use, the ankle clamp is prone to loosen and slide on the human ankle joint, causing deviation in the osteotomy position. Summary of the invention

[0005] In order to reduce the sliding of the ankle cuff on the human ankle joint and ensure the installation stability of the ankle cuff, the present application provides an ankle cuff for knee joint surgery.

[0006] The present application provides an ankle cradle for knee surgery that adopts the following technical solution:

[0007] A knee joint surgery ankle cradle comprises a mounting seat and a bracket slidably connected to one end of the mounting seat, wherein an embedding space for the ankle joint to be embedded is formed on a side of the bracket away from the mounting seat, and two ankle cradle plates are hinged on a side of the bracket away from the mounting seat, and the two ankle cradle plates are respectively located on two opposite sides of the embedding space, and a pulling component is provided between each ankle cradle plate and the bracket for pulling the end of the ankle cradle plate away from the bracket to rotate toward the embedding space to clamp the human ankle joint.

[0008] By adopting the above technical solution, when in use, the human ankle joint is directly placed in the embedded space, and the position of the human ankle joint in the embedded space can be fixed by two ankle holding plates. The ankle holding device can be pulled by the pulling component to always rotate in the direction of the embedded space, so that the clamping force of the ankle holding device on the human ankle joint is more secure, which greatly reduces the probability of the ankle holding device sliding on the human ankle joint and ensures the installation stability of the ankle holding device.

[0009] Optionally, the pulling assembly includes a pulling spring fixed between the ankle holding plate and the bracket, and a connection point between the pulling spring and the ankle holding plate is located on a side of a connection point between the ankle holding plate and the bracket close to the embedded space.

[0010] By adopting the above technical solution, the pulling spring will give the ankle holding plate a force to always rotate in the direction of the bracket, so as to pull the ankle holding plate firmly against the human ankle joint, thereby fixing the position of the human ankle joint in the embedded space.

[0011] Optionally, an auxiliary spring is provided between each ankle-holding plate and the bracket, and the auxiliary spring is used to reduce the pulling force of the pulling spring on the ankle-holding plate or to increase the pulling force of the pulling spring on the ankle-holding plate.

[0012] By adopting the above technical solution, the auxiliary spring can increase the pulling force of the pulling spring on the ankle holding plate, so that the clamping effect of the ankle holding plate is better. Or when the ankle holding device needs to be removed from the ankle joint of the human body, the auxiliary spring is directly operated to reduce the pulling force of the pulling spring on the ankle holding plate, making it more convenient and labor-saving to operate the ankle holding plate to rotate in a direction away from the embedding space.

[0013] Optionally, an auxiliary groove is provided on the ankle holding plate, and the auxiliary groove is opened around the hinge axis of the ankle holding plate and the bracket. An auxiliary rod is slidably connected in the auxiliary groove, and one end of the auxiliary spring is fixed to the auxiliary rod. The two ends of the auxiliary groove are respectively located on a side of the bracket close to the embedded space and a side of the bracket away from the embedded space.

[0014] By adopting the above technical solution, when the auxiliary operation rod slides in the auxiliary groove to the end close to the embedded space, the auxiliary spring will pull the ankle holding plate to rotate in the direction of the embedded space, which can increase the pulling force of the pulling spring; when the auxiliary operation rod slides in the auxiliary groove to the end away from the embedded space, the auxiliary spring will pull the ankle holding plate to slide in the direction away from the embedded space, so as to reduce the force of the pulling spring pulling the ankle holding plate, which is convenient for the doctor to operate the ankle holding plate to slide in the direction away from the embedded space, so as to open the embedded space and place the human ankle joint into the embedded space or take the human ankle joint out of the embedded space.

[0015] Optionally, the bracket includes a mounting plate that slides with the mounting seat and two sliding plates fixed to the side of the mounting plate away from the mounting seat, the two sliding plates are arranged at an angle to form the embedded space, and the two ankle holding plates are respectively hinged on the opposite sides of the two sliding plates.

[0016] By adopting the above technical solution, the position of the embedding space can be changed by operating the mounting plate to slide on the mounting seat, and the embedding space can be formed by two sliding plates to facilitate the embedding of the ankle joint of the human body.

[0017] Optionally, the mounting seat includes a fixed plate that slides with the mounting plate and a connecting rod fixed to the side of the fixed plate away from the mounting plate, a slider is fixed to the side of the mounting plate away from the sliding plate, a sliding groove is provided on the fixed plate for the sliding of the slider, and the fixed plate is also provided with a fixing component for fixing the position of the slider in the sliding groove.

[0018] By adopting the above technical solution, the relative position between the mounting plate and the fixed plate can be changed by operating the slider to slide in the slide groove, and the position of the slider in the slide groove can be fixed by the fixing component to fix the position between the mounting plate and the fixed plate.

[0019] Optionally, a limit groove connected to the bottom of the slide groove is formed in the mounting plate, the fixing component includes a limit rod slidably connected to the limit groove, a limit hole for inserting the limit rod is formed on the side of the slider away from the mounting plate, and a plurality of limit holes are spaced apart along the length direction of the slider, and the fixing component also includes a limit member for driving the limit rod to slide in the limit groove so that the limit rod is inserted into the limit hole or slides out of the limit hole.

[0020] By adopting the above technical solution, the limiting member can drive the limiting rod to slide in the limiting groove, so that the end of the limiting rod is inserted into the limiting hole to fix the position of the slider in the sliding groove; when it is necessary to operate the slider to slide in the sliding groove, the limiting member can be directly used to operate the limiting rod to slide in the limiting groove, so that the end of the limiting rod slides out of the limiting hole, and the slider can be operated to slide in the sliding groove.

[0021] Optionally, the limiting member includes a limiting spring placed in the limiting groove, two ends of the limiting spring respectively abut against the bottom of the limiting groove and the end of the limiting rod, and the limiting rod extends out of the limiting groove and is inserted into the limiting hole under the action of the limiting spring.

[0022] By adopting the above technical solution, the limiting rod can be driven to slide out of the limiting groove and insert into the limiting hole under the elastic action of the limiting spring, so as to fix the position of the slider.

[0023] Optionally, the limiting member also includes a driving rod for driving the limiting rod to slide toward the bottom of the limiting groove, and a mounting hole connected to the limiting groove is opened on the side wall of the mounting plate. The driving rod is hinged on the inner wall of the mounting hole, and one end of the driving rod extends out of the mounting hole to be exposed to the outside, and the other end of the driving rod is engaged with the side wall of the limiting rod to drive the limiting rod to slide.

[0024] By adopting the above technical solution, under normal circumstances, one end of the driving rod is clamped with the side wall of the limiting rod, and the other end extends out of the mounting hole to be exposed to the outside. When it is necessary to operate the limiting rod to slide in the limiting groove, force is directly applied to the driving rod from the outside, and the end of the driving rod will drive the limiting rod to slide in the direction of the bottom of the limiting groove, thereby releasing the matching relationship between the limiting rod and the slider.

[0025] Optionally, an abutment rod is fixed to the side wall of the mounting plate, and the abutment rod is located on the side of the driving rod facing the bracket. When the end of the driving rod located outside the mounting plate approaches the abutment rod, the end of the driving rod facing the limit rod will drive the limit rod to retract into the limit groove.

[0026] By adopting the above technical solution, the limiting rod can be retracted into the limiting groove by operating the driving rod to move in the direction of the abutting rod, and the position of the abutting rod can also limit the extreme position of the driving rod, which is convenient for the doctor to apply force to operate the driving rod to rotate.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] The present application provides a pulling component to apply a force to the ankle holding plate to move in the direction of the embedding space, so that the ankle holding plate can firmly clamp the human ankle joint in the embedding space, reducing the probability of the ankle holding device sliding on the human ankle joint, and ensuring the installation stability of the ankle holding device;

[0029] The position of the slider in the slide groove can be fixed by the fixing component to fix the relative position between the mounting plate and the fixing plate, thereby fixing the position of the human ankle joint and the force line rod, and facilitating the positioning of the tibial force line;

[0030] The provision of the auxiliary spring makes it easier to save effort when operating the embedded space to open, and can increase the force of the ankle holding plate against the ankle joint of the human body, further increasing the installation stability of the ankle holding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of this application.

[0032] Figure 2 This is a schematic diagram designed to illustrate the structure of the limiter.

[0033] Figure 3 It is a structural diagram of this application from another perspective.

[0034] Explanation of the reference numerals in the accompanying drawings: 1. Mounting seat; 11. Fixing plate; 111. Slide groove; 112. Limiting groove; 113. Mounting hole; 12. Connecting rod; 2. Bracket; 21. Mounting plate; 211. Sliding block; 212. Limiting hole; 22. Sliding plate; 23. Embedding space; 3. Ankle holding plate; 31. Auxiliary groove; 32. Auxiliary rod; 33. Operating hole; 4. Pulling assembly; 41. Pulling spring; 411. First pin; 412. Second pin; 413. Embedding groove; 5. Fixing assembly; 51. Limiting rod; 511. Driving groove; 52. Limiting spring; 53. Limiting member; 531. Driving rod; 532. Abutting rod; 6. Auxiliary spring. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-3 This application is described in further detail.

[0036] The present application embodiment discloses an ankle cradle for knee joint surgery. Figure 1 The ankle clasper for knee surgery includes a mounting seat 1 for connecting with a force line rod and a bracket 2 slidably connected to one side of the mounting seat 1. The bracket 2 is located on a side of the mounting seat 1 away from the force line rod, and an embedding space 23 for a human ankle joint to be embedded is formed on the side of the bracket 2 away from the mounting seat 1 to achieve connection between the bracket 2 and the human ankle joint.

[0037] Reference Figure 1 and Figure 2 The bracket 2 includes a mounting plate 21 slidably connected to the mounting seat 1 and two sliding plates 22 fixed to the side of the mounting plate 21 away from the mounting seat 1. The two sliding plates 22 are respectively located at both ends of the mounting plate 21, and the distance between the two sliding plates 22 gradually increases from the side close to the mounting plate 21 to the side away from the mounting plate 21. The above-mentioned embedded space 23 is formed between the two mounting plates 21 and the mounting seat 1. An ankle holding plate 3 is hinged at one end of the two sliding plates 22 away from the mounting plate 21, and the ankle holding plate 3 is located between the two sliding plates 22. A pulling component 4 is provided between each ankle holding plate 3 and the corresponding sliding plate 22 for driving the end of the ankle holding plate 3 away from the sliding plate 22 to rotate in the direction of the embedding space 23. Driven by the pulling component 4, there is always a force for rotating the end of the ankle holding plate 3 away from the sliding plate 22 in the direction of the embedding space 23, so that the ankle holding plate 3 can be firmly abutted against the human ankle joint, fix the position of the human ankle joint in the embedding space 23, and reduce the probability of the ankle holding device sliding on the human ankle joint.

[0038] The pulling assembly 4 includes a pulling spring 41 fixedly connected between the ankle holding plate 3 and the mounting plate 21, and the connection point between the pulling spring 41 and the ankle holding plate 3 is located on the side of the connection point between the ankle holding plate 3 and the sliding plate 22 facing the embedding space 23, so that the ankle holding plate 3 can be driven to rotate in the direction of the embedding space 23 under the elastic force of the pulling spring 41. Of course, the end of the pulling spring 41 away from the ankle holding plate 3 can also be fixedly connected to the sliding plate 22, as long as a force can be applied to the ankle holding plate 3 to rotate in the direction of the embedding space 23.

[0039] Specifically, a first pin 411 is fixedly connected to each ankle plate 3, and a second pin 412 is fixedly connected to both ends of the mounting plate 21, and both ends of the pulling spring 41 are respectively sleeved on the first pin 411 and the second pin 412 to achieve the installation of the pulling spring 41. The first pin 411 is located at one end of the ankle plate 3 close to the sliding plate 22, and an embedding groove 413 for the pulling spring 41 to be embedded is provided on the side of the sliding plate 22 facing the embedding space 23. When the two ends of the pulling spring 41 are respectively sleeved on the first pin 411 and the second pin 412, the pulling spring 41 is also embedded in the embedding groove 413, so as to avoid the pulling spring 41 from hindering the placement of the human ankle joint in the embedding space 23.

[0040] Reference Figure 1 and Figure 2 The mounting seat 1 includes a fixing plate 11 slidably connected to the mounting plate 21 and a connecting rod 12 fixed to a side of the fixing plate 11 away from the mounting plate 21 , and an end of the connecting rod 12 away from the fixing plate 11 is used to be connected to the force line rod.

[0041] Among them, a slider 211 is fixedly connected to the side of the mounting plate 21 away from the sliding plate 22, and a slide groove 111 for the slider 211 to slide is provided on the side of the fixed plate 11 away from the connecting rod 12. The slide groove 111 runs through the two opposite sides of the fixed plate 11. By operating the slider 211 to slide in the slide groove 111, the position of the embedded space 23 relative to the fixed plate 11 can be changed to change the position between the human ankle joint placed in the embedded space 23 and the force line rod, so as to achieve the positioning of the tibial force line. At the same time, in order to prevent the slider 211 from sliding in the slide groove 111 during the operation and affecting the normal operation, a fixing component 5 for fixing the position of the slider 211 in the slide groove 111 is also provided.

[0042] Reference Figure 2A limiting groove 112 communicating with the bottom of the slide groove 111 is provided on the fixing plate 11. The fixing assembly 5 includes a limiting rod 51 slidably connected in the limiting groove 112 and a limiting spring 52 fixed between the limiting rod 51 and the bottom of the limiting groove 112. At the same time, a limiting hole 212 for inserting the limiting rod 51 is provided on one side of the slider 211 located in the slide groove 111. A plurality of limiting holes 212 are provided at intervals along the length direction of the slide groove 111. When the operating slider 211 slides to a suitable position in the slide groove 111, the limiting rod 51 can be inserted into the corresponding limiting hole 212 under the action of the limiting spring 52, thereby fixing the position of the slider 211 in the slide groove 111.

[0043] At the same time, a limiting member 53 is also provided on the fixed plate 11 for driving the limiting rod 51 to slide in the limiting groove 112 to release the fixed relationship between the limiting rod 51 and the slider 211. At the same time, a mounting hole 113 connected to the limiting groove 112 is opened on the outer wall of the fixed plate 11, and the limiting member 53 is installed in the mounting hole 113.

[0044] The limiting member 53 includes a driving rod 531 hinged on the hole wall of the mounting hole 113, the middle part of the driving rod 531 is hinged to the hole wall of the mounting hole 113, one end of the driving rod 531 is exposed to the outside for people to operate, the other end of the driving rod 531 is located in the limiting groove 112 and is engaged with the limiting rod 51, and a driving groove 511 is provided on the side wall of the limiting rod 51 for the driving rod 531 to be embedded. Under normal conditions, the driving rod 531 is located in the driving groove 511, and the limiting rod 51 is inserted into the limiting hole 212 under the elastic force of the limiting spring 52. When the position of the slider 211 in the slide groove 111 needs to be moved, the driving rod 531 is directly driven to rotate by one end of the driving rod 531 located outside the mounting hole 113, and the end of the driving rod 531 located in the driving groove 511 will drive the limiting rod 51 to slide into the limiting groove 112 through the side wall of the driving groove 511, so as to release the matching relationship between the limiting rod 51 and the slider 211.

[0045] There may be two mounting holes 113 , which are located at two opposite sides of the fixing plate 11 , and two driving rods 531 may be symmetrically arranged, so that the limiting rod 51 can be driven to slide more smoothly.

[0046] Reference Figure 2 and Figure 3, abutment rods 532 are fixedly connected to both sides of the mounting hole 113 of the fixing plate 11, and the abutment rods 532 are located on the side of the mounting hole 113 facing the mounting plate 21. When the end of the driving rod 531 located outside the mounting hole 113 is rotated in the direction of the abutment rod 532, the end of the driving rod 531 located in the driving groove 511 will drive the limiting rod 51 to slide toward the bottom of the limiting groove 112 until the driving rod 531 abuts against the abutment rod 532, and the limiting rod 51 will also slide into the limiting groove 112. The matching relationship between the limiting rod 51 and the slider 211 is released, and the doctor can directly operate the slider 211 to slide in the slide groove 111.

[0047] When in use, the doctor directly operates the ankle holding plate 3 to move in a direction away from the embedding space 23 to open the opening of the embedding space 23, making it easier to place the patient's ankle joint in the embedding space 23.

[0048] In order to facilitate the operation of the ankle embracing plate 3 to move in a direction away from the embedding space 23, an operation hole 33 is opened on the ankle embracing plate 3, so that the doctor can drive the ankle embracing device to rotate through the operation hole 33.

[0049] At the same time, an auxiliary spring 6 is also arranged between each ankle holding plate 3 and the sliding plate 22 connected thereto. The auxiliary spring 6 is used to reduce the pulling force of the pulling spring 41 on the ankle holding plate 3 so that the doctor can drive the ankle holding plate 3 to rotate away from the embedding space 23; the auxiliary spring 6 can also increase the pulling force of the pulling spring 41 on the ankle holding plate 3 so that the ankle holding plate 3 can clamp the human ankle joint more firmly.

[0050] Specifically, each ankle-holding plate 3 is provided with an arc-shaped auxiliary groove 31, the arc center of the auxiliary groove 31 coincides with the hinge axis of the ankle-holding plate 3 and the sliding plate 22, and the two ends of the auxiliary groove 31 are respectively located on the side of the sliding plate 22 close to the embedding space 23 and the side of the sliding plate 22 away from the embedding space 23. At the same time, an auxiliary rod 32 is slidably connected in the auxiliary groove 31, one end of the auxiliary spring 6 is fixed to the auxiliary rod 32, and the other end of the auxiliary spring 6 can be fixed to the sliding plate 22 or the mounting plate 21. This application takes the other end of the auxiliary spring 6 fixed to the sliding plate 22 as an example for explanation.

[0051] During use, when the auxiliary operation rod 32 slides in the auxiliary groove 31 to the end of the sliding plate 22 facing the embedded space 23, the auxiliary spring 6 will give the ankle holding board 3 a force to rotate toward the embedded space 23, so as to increase the pulling force of the pulling spring 41 on the ankle holding board 3, so that the fixation of the ankle holding board 3 and the human ankle joint is more firmly; when the auxiliary operation rod 32 slides in the auxiliary groove 31 to the end of the sliding plate 22 away from the embedded space 23, the auxiliary spring 6 will give the ankle holding board 3 a force to rotate away from the embedded space 23, and the force is opposite to the pulling direction of the pulling spring 41, so as to reduce the force of the pulling spring 41 on the ankle holding board 3, so that the doctor can drive the ankle holding board 3 to move in the direction away from the embedded space 23 with great effort.

[0052] At the same time, in order to facilitate holding the ankle holding board 3 to drive the ankle holding board 3 to rotate, an operation hole 33 is opened on each ankle holding board 3, and the doctor can directly drive the ankle holding board 3 to rotate through the operation hole 33.

[0053] The implementation principle of an ankle cradle for knee joint surgery in the embodiment of the present application is as follows: when in use, the ankle cradle is directly mounted on the force line rod, and then the ankle cradle plate 3 is driven to rotate around the hinge axis with the sliding plate 22 in a direction away from the embedding space 23 through the operating hole 33, and then the ankle cradle is operated to approach the patient's ankle joint so that the human ankle joint is located in the embedding space 23, and the ankle cradle plate 3 is operated to abut against the surface of the human ankle joint. The position of the ankle cradle plate 3 on the human ankle joint can be fixed under the elastic force of the pulling spring 41, and at the same time, the auxiliary rod 32 is operated to slide in the auxiliary groove 31, so that the auxiliary rod 32 slides to one end of the auxiliary groove 31 close to the embedding space 23, and the force of the ankle cradle plate 3 abutting against the human ankle joint is increased by the auxiliary spring 6. Then, the position of the slider 211 in the slide groove 111 is adjusted as needed to position the tibial force line. During adjustment, the end of the driving rod 531 located outside is directly operated to move closer to the abutting rod 532, so as to drive the limiting rod 51 into the limiting hole 212 through the driving rod 531, release the matching relationship between the limiting rod 51 and the slider 211, and the doctor can directly operate the slider 211 to slide in the slide groove 111. After adjusting the slider 211 to the appropriate position, the force applied to the driving rod 531 is directly released, and the end of the limiting rod 51 is pushed out of the limiting groove 112 and inserted into the limiting hole 212 on the slider 211 under the elastic force of the limiting spring 52, fixing the position of the slider 211 in the slide groove 111, and completing the adjustment of the ankle hugger. The doctor can then adjust the position of the nail handle on the extramedullary positioning instrument as needed.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ankle holding device for knee joint surgery, characterized in that: The invention comprises a mounting seat (1) and a bracket (2) slidably connected to one end of the mounting seat (1), the bracket (2) being located on a side of the mounting seat (1) away from a force line rod, the side of the bracket (2) away from the mounting seat (1) forming an embedding space (23) for embedding an ankle joint, two ankle-holding plates (3) being hingedly connected on the side of the bracket (2) away from the mounting seat (1), the two ankle-holding plates (3) being respectively located on two opposite sides of the embedding space (23), and a pulling component (4) being provided between each ankle-holding plate (3) and the bracket (2) for pulling an end of the ankle-holding plate (3) away from the bracket (2) to rotate toward the embedding space (23) to achieve clamping of the ankle joint of a human body; the pulling component (4) comprising a pulling spring (41) fixedly connected between the ankle-holding plate (3) and the bracket (2), the pulling spring (41) and the ankle-holding plate (3) being connected to each other. The connection point of the ankle-holding plate (3) and the bracket (2) is located on the side of the connection point of the ankle-holding plate (3) and the bracket (2) close to the embedding space (23); the bracket (2) comprises a mounting plate (21) which is slidably matched with the mounting seat (1) and two sliding plates (22) which are fixedly connected to the mounting plate (21) on the side away from the mounting seat (1), the two sliding plates (22) are arranged at an angle to form the embedding space (23), and the two ankle-holding plates (3) are respectively hinged on the opposite sides of the two sliding plates (22); an embedding groove (413) for embedding a pulling spring (41) is provided on the side of the sliding plate (22) facing the embedding space (23), so as to prevent the pulling spring (41) from hindering the placement of the human ankle joint in the embedding space (23); an operating hole (33) is provided on the ankle-holding plate (3) for driving the ankle-holding plate (3) to rotate in a direction away from the embedding space (23).

2. The ankle holding device for knee joint surgery according to claim 1, characterized in that: An auxiliary spring (6) is provided between each ankle-holding plate (3) and the bracket (2), and the auxiliary spring (6) is used to reduce the pulling force of the pulling spring (41) on the ankle-holding plate (3) or to increase the pulling force of the pulling spring (41) on the ankle-holding plate (3).

3. The ankle holding device for knee joint surgery according to claim 2, characterized in that: The ankle embracing plate (3) is provided with an auxiliary groove (31), and the auxiliary groove (31) is provided around the hinge axis of the ankle embracing plate (3) and the bracket (2). An auxiliary rod (32) is slidably connected in the auxiliary groove (31), and one end of the auxiliary spring (6) is fixed to the auxiliary rod (32). The two ends of the auxiliary groove (31) are respectively located on a side of the bracket (2) close to the embedding space (23) and a side of the bracket (2) away from the embedding space (23).

4. The ankle holding device for knee joint surgery according to claim 1, characterized in that: The mounting seat (1) comprises a fixed plate (11) slidably matched with the mounting plate (21) and a connecting rod (12) fixedly connected to a side of the fixed plate (11) away from the mounting plate (21); a sliding block (211) is fixedly connected to a side of the mounting plate (21) away from the sliding plate (22); a sliding groove (111) for the sliding block (211) to slide is provided on the fixed plate (11); and a fixing component (5) for fixing the position of the sliding block (211) in the sliding groove (111) is also provided on the fixed plate (11).

5. The ankle holding device for knee joint surgery according to claim 4, characterized in that: The mounting plate (21) is provided with a limiting groove (112) which is connected to the bottom of the slide groove (111); the fixing assembly (5) comprises a limiting rod (51) slidably connected to the limiting groove (112); a limiting hole (212) for inserting the limiting rod (51) is provided on a side of the sliding block (211) away from the mounting plate (21); a plurality of limiting holes (212) are provided at intervals along the length direction of the sliding block (211); the fixing assembly (5) further comprises a limiting member (53) for driving the limiting rod (51) to slide in the limiting groove (112) so that the limiting rod (51) is inserted into the limiting hole (212) or slides out of the limiting hole (212).

6. The ankle holding device for knee joint surgery according to claim 5, characterized in that: The limiting member (53) comprises a limiting spring (52) placed in the limiting groove (112), two ends of the limiting spring (52) respectively abut against the bottom of the limiting groove (112) and the end of the limiting rod (51), and the limiting rod (51) extends out of the limiting groove (112) and is inserted into the limiting hole (212) under the action of the limiting spring (52).

7. The ankle holding device for knee joint surgery according to claim 6, characterized in that: The limiting member (53) further comprises a driving rod (531) for driving the limiting rod (51) to slide toward the bottom of the limiting groove (112); a mounting hole (113) connected to the limiting groove (112) is provided on the side wall of the mounting plate (21); the driving rod (531) is hinged on the inner wall of the mounting hole (113); one end of the driving rod (531) extends out of the mounting hole (113) to be exposed to the outside; the other end of the driving rod (531) is engaged with the side wall of the limiting rod (51) to drive the limiting rod (51) to slide.

8. The ankle holding device for knee joint surgery according to claim 7, characterized in that: An abutment rod (532) is fixedly connected to the side wall of the mounting plate (21), and the abutment rod (532) is located on the side of the driving rod (531) facing the bracket (2). When the end of the driving rod (531) located outside the mounting plate (21) approaches the abutment rod (532), the end of the driving rod (531) facing the limiting rod (51) drives the limiting rod (51) to retract into the limiting groove (112).

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