An animal leg fixing device

Abstract

This invention belongs to the field of medical technology, specifically disclosing an animal leg fixation device, including a base assembly, a tibia fixation assembly, and a femoral fixation assembly. The base assembly includes an adjustable-spaced tibia mounting seat and a femoral mounting seat. The tibia fixation assembly includes a tibia support and a tibia fixation component. The tibia support is rotatably mounted on the tibia mounting seat, and the tibia fixation component is mounted to the tibia support with an adjustable distance between them. The tibia fixation component is used to fix the tibia of the animal leg. The femoral fixation assembly includes a femoral support and a femoral fixation component. The lower end of the femoral support is rotatably mounted on the femoral mounting seat, and the femoral fixation component is mounted to the femoral support with an adjustable distance between them. The femoral mounting seat is used to fix the femur of the animal leg. The animal leg fixation device provided by this invention can improve the reliability and stability of animal leg fixation, and enhance the flexibility and accuracy of animal experiments.

Description

Technical Field

[0001] This invention relates to the field of medical technology, and more particularly to an animal leg fixation device. Background Technology

[0002] With advancements in technology and the development of robotics, medical robots that assist surgeons in performing operations are becoming increasingly widely used in the medical field. While improving surgical precision and stability, they also reduce the workload and fatigue of surgeons, thereby enhancing surgical safety. Orthopedic surgical robots are a type of medical robot that can be applied to bone and joint surgeries such as joint replacement and repair surgeries.

[0003] Before orthopedic surgical robots can be applied in clinical surgery, animal trials are needed to validate their performance. This involves using the orthopedic surgical robot to perform joint surgery on the animal's leg. To ensure the precision of the orthopedic surgical robot's operation and excellent postoperative clinical outcomes, the knee joint of the animal undergoing surgery must be fixed on the operating table, and the angle between the femur and tibia must be adjustable to ensure the smooth execution of the surgery by the orthopedic robot.

[0004] In existing technologies, animal leg joints are usually fixed directly by straps or other binding structures during animal experiments. There are no special animal leg fixation devices for animal experiments, which makes animal experiment operations inconvenient, the fixation and adjustment of animal legs are not flexible and the fixation position is not accurate, affecting the normal and reliable conduct of animal experiments. Summary of the Invention

[0005] The purpose of this invention is to provide an animal leg fixation device for fixing and adjusting the animal leg during animal knee joint experimental surgery, thereby improving the convenience and flexibility of animal experiments and enhancing the accuracy of animal experiments.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An animal leg restraint device, the animal leg restraint device comprising:

[0008] The base assembly includes a fixed base and a tibia mount and a femoral mount spaced apart on the fixed base along the first direction, wherein the tibia mount and / or the femoral mount are slidably mounted on the fixed base along the first horizontal direction;

[0009] A tibial fixation assembly includes a tibial support and a tibial fixation component. The lower end of the tibial support is rotatably mounted on the tibial mount about a second horizontal direction, and the upper end extends obliquely upward toward the femoral mount. The tibial fixation component is mounted to the tibial support, and the distance between the component and the tibial mount is adjustable in the extending direction of the tibial support. The tibial fixation component is used to fix the tibia of an animal leg, and the second horizontal direction is perpendicular to the first horizontal direction.

[0010] A femoral fixation assembly includes a femoral support and a femoral fixation component. The lower end of the femoral support is rotatably mounted on the femoral mount about a second horizontal direction, and the upper end extends upward at an angle toward the tibia mount. The femoral fixation component is mounted on the femoral support and the distance between the component and the femoral mount is adjustable in the extending direction of the femoral support. The femoral fixation component is used to fix the femur of the animal leg.

[0011] As an optional technical solution for animal leg fixation device, the femoral support includes a first support rod, a second support rod, and a third support rod connected sequentially from bottom to top. The first support rod and the third support rod both extend upward at an angle away from the femoral mounting seat, and the first support rod and the third support rod are offset in the second horizontal direction. The length of the third support rod is greater than twice the length of the first support rod.

[0012] The femoral fixation component is mounted on the third support rod portion, and the femoral fixation component has a femoral clamping unit. The femoral clamping unit, the tibia fixation component, and the first support rod portion are arranged facing each other in the first horizontal direction.

[0013] As an optional technical solution for animal leg fixation devices, the installation position of the femoral fixation component on the tibial support can be adjusted in the extension direction of the tibial support;

[0014] And / or, the mounting position of the femoral fixation component on the femoral support is adjusted along a third direction, which is perpendicular to both the second horizontal direction and the extension of the femoral support.

[0015] As an optional technical solution for animal leg fixation devices, the femoral fixation assembly includes a femoral clamping seat and two femoral clamping plates. The two femoral clamping plates are spaced apart in the second horizontal direction and are used to clamp the femur. The femoral clamping seat is connected to the femoral support member, one femoral clamping plate is connected to the femoral clamping seat, and the other femoral clamping plate is movably disposed.

[0016] As an optional technical solution for animal leg fixation devices, the length of the tibial support can be adjusted, or the mounting position of the tibial fixation assembly on the tibial support can be adjusted in the extension direction of the tibial support.

[0017] As an optional technical solution for animal leg fixation device, the tibial support includes a fixed support and an adjustable support. The lower end of the fixed support is rotatably connected to the tibial mounting seat, and the adjustable support is slidably connected to the fixed support to adjust the length of the tibial support. The tibial fixation assembly is mounted on the adjustable support.

[0018] As an optional technical solution for animal leg fixation device, the adjusting support has a plate-like structure, and the upper width of the adjusting support is greater than the lower width of the adjusting support. The tibia fixation component is installed on the upper end of the adjusting support; and / or, the adjusting support has plate weight reduction holes.

[0019] As an optional technical solution for animal leg fixation device, the tibia fixation assembly includes a tibia clamping seat and two tibia clamping plates. The tibia clamping seat is installed on the tibia support, and the two tibia clamping plates are used to clamp the tibia. The distance between the two tibia clamping plates can be adjusted.

[0020] And / or, the mounting position of the tibial fixation assembly on the tibial support is adjustable in the second horizontal direction.

[0021] As an optional technical solution for animal leg fixation device, the two tibial clamping plates are a fixed clamping plate and a movable clamping plate, respectively. The fixed clamping plate is installed on the tibial clamping seat, and the tibial clamping seat has an adjustment seat portion that is opposite to and spaced apart from the fixed clamping plate.

[0022] The tibial fixation assembly also includes an adjustment unit, which is installed on the adjustment seat and connected to the movable clamping plate. The movable clamping plate is located between the fixed clamping plate and the adjustment seat, and the adjustment unit can drive the movable clamping plate to move away from or towards the fixed clamping plate.

[0023] As an optional technical solution for animal leg fixation device, the tibial clamping plate has an arc-shaped structure, and the opening of the arc-shaped structure faces the other tibial clamping plate;

[0024] And / or, the clamping surface of the tibial clamping plate is provided with a plurality of clamping teeth.

[0025] As an optional technical solution for an animal leg fixation device, the animal leg fixation device further includes a joint fixation component, which includes:

[0026] The bone pin seat is rotatably mounted on the upper end of the tibial support or the femoral support around the second horizontal direction;

[0027] A bone needle is mounted on the bone needle seat and extends along the second horizontal direction. The distance between the bone needle and the rotation axis of the bone needle seat is adjustable.

[0028] As an optional technical solution for an animal leg fixation device, the bone pin seat is mounted on the tibial support or the femoral support via a rotating shaft, the rotating shaft extending along the second horizontal direction;

[0029] The bone needle seat is elongated and has an adjustment hole along its extension direction. The rotating shaft slides through the adjustment hole, and the bone needle is installed on the upper end of the bone needle seat.

[0030] As an optional technical solution for animal leg fixation device, the tibia mounting base includes a slide and an extension seat. The slide is slidably mounted on the fixation base. One end of the extension seat is connected to the slide, and the other end of the extension seat extends obliquely upward in a direction away from the femoral mounting base. The lower end of the tibia support is rotatably connected to the upper end of the extension seat.

[0031] And / or, the femoral mount includes a slide and an extension, the slide being slidably mounted on the fixed base, one end of the extension being connected to the slide, the other end of the extension extending obliquely upward in a direction away from the tibial mount, and the lower end of the femoral support being rotatably connected to the upper end of the extension.

[0032] As an alternative technical solution for animal leg fixation devices, the base assembly further includes:

[0033] The adjusting rod includes an adjusting crossbar portion extending along the second horizontal direction and an adjusting longitudinal bar portion extending along the vertical direction, wherein the fixed base is slidably mounted on the adjusting crossbar portion along the second horizontal direction;

[0034] A beam fixing assembly is slidably installed on the adjusting longitudinal rod portion, and the beam fixing assembly is used to connect with the side crossbeam of the operating table.

[0035] As an optional technical solution for animal leg fixation device, the rotating connection ends of the tibial support and the femoral support are both rotatably connected to the corresponding tibial mounting seat or the femoral mounting seat through a rotation adjustment assembly;

[0036] The rotation adjustment assembly includes a rotating seat and a rotating mounting shaft. The rotating seat is mounted on the corresponding tibial mounting seat or femoral mounting seat. The rotating connecting end is mounted on the rotating seat through the rotating mounting shaft. The rotating seat is provided with n fixing holes evenly spaced around the rotating mounting shaft in the circumferential direction. The rotating connecting end is provided with N adjusting holes evenly spaced along the circumferential direction of the rotating mounting shaft, where 2N = 3n.

[0037] The rotation adjustment assembly also includes a pin that is inserted into the aligned adjustment hole and the fixing hole.

[0038] The beneficial effects of this invention are as follows:

[0039] The animal leg fixation device provided by this invention, by setting up a femoral fixation assembly and a tibial fixation assembly, can separately support and fix the femur and tibia of the animal leg, thereby ensuring that both the femur and tibia are reliably and stably supported on the operating table. This guarantees the fixation stability of the animal leg during the experiment, reduces the probability of leg swaying, and thus improves the reliability of the surgical experiment. Furthermore, by setting the distance between the lower ends of the femoral fixation assembly and the lower ends of the tibial fixation assembly to be adjustable in the first horizontal direction, it can be applied to animal experiments with animal legs of different lengths, improving the versatility of the animal leg fixation device and ensuring the fixation of the femur and tibia. Reliability: Since the lower ends of both the femoral and tibial supports can rotate around a second horizontal direction, the angle between the femoral and tibial supports can be adjusted, thereby adjusting the bending angle of the animal's knee joint. This meets the requirements of knee joint surgery in animals under different angle testing conditions, improving surgical flexibility and the reliability of surgical testing. By setting adjustable femoral and tibial fixation components, the fixation positions of both the femur and tibia can be adjusted, allowing the animal leg fixation device to meet the testing needs of animal legs of different sizes. This ensures the stable and secure fixation of the animal leg on the animal leg fixation device, further improving the reliability of animal testing. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the animal leg fixing device provided in Embodiment 1 of the present invention;

[0041] Figure 2 This is a schematic diagram of the base assembly provided in Embodiment 1 of the present invention from a first perspective.

[0042] Figure 3 This is a schematic diagram of the base assembly provided in Embodiment 1 of the present invention from a second perspective;

[0043] Figure 4 yes Figure 3 A magnified view of a section at point I;

[0044] Figure 5 This is a schematic diagram of the disassembled structure of the beam fixing assembly provided in Embodiment 1 of the present invention;

[0045] Figure 6 This is a cross-sectional view of the base assembly provided in Embodiment 1 of the present invention;

[0046] Figure 7 This is a schematic diagram of the disassembled structure of the rotating connection structure provided in Embodiment 1 of the present invention;

[0047] Figure 8 This is a cross-sectional view of the rotating connection structure provided in Embodiment 1 of the present invention;

[0048] Figure 9 This is a schematic diagram of the rotating connection structure provided in Embodiment 1 of the present invention when the adjusting hole is aligned with the first fixing hole;

[0049] Figure 10 This is a schematic diagram of the rotating connection structure provided in Embodiment 1 of the present invention when the adjusting hole and the second fixing hole are aligned;

[0050] Figure 11 This is a schematic diagram of the femoral fixation assembly and rotation adjustment component provided in Embodiment 1 of the present invention;

[0051] Figure 12 This is a partial structural schematic diagram of the femoral fixation assembly provided in Embodiment 1 of the present invention;

[0052] Figure 13 yes Figure 12 A schematic diagram of the split structure of the middle part;

[0053] Figure 14 This is a schematic diagram of the tibial fixation assembly provided in Embodiment 1 of the present invention from one perspective;

[0054] Figure 15 This is a schematic diagram of the tibial fixation assembly provided in Embodiment 1 of the present invention from another perspective;

[0055] Figure 16 This is a cross-sectional view of the tibial fixation assembly provided in Embodiment 1 of the present invention;

[0056] Figure 17 This is a cross-sectional view of the base assembly provided in Embodiment 2 of the present invention when the locking wrench is in the locking state;

[0057] Figure 18 This is a side view of the base assembly provided in Embodiment 2 of the present invention when the locking wrench is in the unlocked state.

[0058] The markings in the image are as follows:

[0059] 1. Base assembly; 11. Fixed base; 111. Base plate; 1111. Slide plate; 1112. End plate; 1113. Horizontal locking hole; 1114. Horizontal sliding groove; 112. Slide rail; 113. Sliding limit component; 114. Mounting hole; 12. Adjusting rod; 121. Adjusting crossbar; 1211. Horizontal adjusting threaded hole; 122. Adjusting longitudinal rod; 1221. Tooth; 1222. Rod weight reduction hole; 1223. Pressing groove; 13. Beam fixing assembly; 131. U-shaped seat; 1311. Seat side; 1312. Seat crossbar; 1313. Beam sliding groove; 1314. Rod through hole; 1315. First through hole; 1316. Second through hole; 13 2. Locking rod; 1321. Main rod part; 1322. Screw part; 1323. Round rod part; 1324. Locking threaded hole; 1325. Grip part; 133. Locking nut; 134. Beam locking component; 135. Beam slide groove; 14. Mounting seat; 14a. Femoral mounting seat; 14b. Tibial mounting seat; 141. Slide seat; 142. Extension seat; 15. Seat locking unit; 151. Locking threaded component; 152. Locking nut; 153. Adjusting wrench; 1531. Handle part; 1532. Rotating ear part; 154. Pressing seat; 1541. Pressing groove; 155. Hinge shaft; 156. Locking rod; 157. Locking head; 16. Horizontal adjustment fixing component;

[0060] 2. Femoral fixation assembly; 21. Femoral support component; 211. First support rod portion; 212. Second support rod portion; 213. Third support rod portion; 214. Adjustment hole; 215. Adjustment through hole; 2151. Round hole portion; 2152. Anti-rotation hole portion; 22. Femoral fixation component; 221. Femoral clamping seat; 2211. Locking through hole; 222. Femoral clamping plate; 2221. Pin hole; 23. Femoral locking component; 231. Locking threaded component; 232. Femoral locking knob;

[0061] 3. Tibial fixation assembly; 31. Tibial support; 311. Fixation support; 3111. Adjustment groove; 3112. Mounting elongated hole; 312. Adjustment support; 3121. Guide rail; 3122. Plate weight reduction hole; 3123. Lower through hole; 32. Tibial fixation component; 321. Tibial clamping seat; 3211. Connecting horizontal part; 3212. Connecting vertical part; 3213. Adjustment seat; 3214. Limiting boss; 3215. Upper through hole; 322. Tibial clamping plate; 322a. Fixing clamping plate; 322b. Movable clamping plate; 3221. Clamping teeth; 323. Spacing adjustment unit; 3231. Adjusting bolt; 3232. Fastening screw; 3233. Spacer ring; 33. Adjusting fastener;

[0062] 4. Joint fixation assembly; 41. Bone pin seat; 411. Adjustment elongated hole; 42. Bone pin sleeve; 43. Rotating shaft; 44. Fastening nut;

[0063] 5. Rotation adjustment assembly; 51. Rotation mounting shaft; 511. Smooth shaft part; 512. Threaded shaft part; 513. Pressing head; 514. Protruding post part; 52. Rotation limiter; 521. Insert post; 522. Connecting block part; 53. Rotation locking part; 531. Locking sleeve part; 532. Locking knob part; 54. Rotating seat; 541. Fixing hole; 541a. First fixing hole; 541b. Second fixing hole. Detailed Implementation

[0064] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0065] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0068] like Figure 1As shown, this embodiment provides an animal leg fixation device for supporting, fixing, and adjusting the angle of sheep legs or other animal legs used in knee joint surgery, thereby improving the convenience, flexibility, and reliability of animal experiments and reducing the difficulty of experiments.

[0069] The animal leg fixation device provided in this embodiment includes a base assembly 1, a tibia fixation assembly 3, and a femur fixation assembly 2. The base assembly 1 is used to mount the animal leg fixation device onto the operating table; the tibia fixation assembly 3 is used to support and fix the tibia of the animal leg; and the femur fixation assembly 2 is used to support and fix the femur of the animal leg, thereby ensuring that both the femur and tibia of the animal leg are reliably and stably supported on the operating table.

[0070] Specifically, the base assembly 1 includes a tibia mounting seat 14b and a femur mounting seat 14a spaced apart along a first horizontal direction, and the distance between the tibia mounting seat 14b and the femur mounting seat 14a is adjustable.

[0071] The tibial fixation assembly 3 includes a tibial support 31 and a tibial fixation component 32. The lower end of the tibial support 31 is rotatably mounted on the tibial mount 14b about a second horizontal direction, and the upper end extends upward at an angle toward the femoral mount 14a. The tibial fixation component 32 is mounted to the tibial support 31, and the distance between the tibial support 31 and the tibial mount 14b is adjustable in the extending direction of the tibial support 31. The tibial fixation component 32 is used to fix the tibia of the animal leg, and the second horizontal direction is perpendicular to the first horizontal direction.

[0072] The femoral fixation assembly 2 includes a femoral support 21 and a femoral fixation component 22. The lower end of the femoral support 21 is rotatably mounted on the femoral mounting seat 14a in a second horizontal direction, and the upper end extends upward at an angle toward the tibia mounting seat 14b. The femoral fixation component 22 is mounted on the femoral support 21, and the distance between the femoral support 21 and the femoral mounting seat 14a is adjustable in the extending direction of the femoral support 21. The femoral mounting seat 14a is used to fix the femur of the animal leg.

[0073] The animal leg fixation device provided in this embodiment, by setting up a femoral fixation assembly 2 and a tibial fixation assembly 3, can support and fix the femur and tibia of the animal leg separately, thereby ensuring that the femur and tibia of the animal leg are reliably and stably supported on the operating table, thus ensuring the fixation stability of the animal leg during the experiment, reducing the probability of the animal leg shaking, and thus improving the reliability of the surgical experiment; by setting the distance between the lower end of the femoral fixation assembly 2 and the lower end of the tibial fixation assembly 3 to be adjustable in the first horizontal direction, it can be applied to animal experiments of animal legs of different lengths, improving the versatility of the animal leg fixation device, and ensuring the fixation reliability of the femur and tibia of the animal leg; Since the lower ends of both the femoral support 21 and the tibial support 31 can rotate around the second horizontal direction, the angle between the femoral support 21 and the tibial support 31 can be adjusted, thereby adjusting the bending angle of the animal's knee joint. This meets the requirements of knee joint surgery for animals under different angle test conditions, improving surgical flexibility and the reliability of surgical tests. By setting the femoral fixation component 22 and the tibial fixation component 32, the fixation positions of the femur and tibia can be adjusted, so that the animal leg fixation device can meet the test requirements of animal legs of different sizes, ensuring the stability and secure fixation of the animal leg on the animal leg fixation device, further improving the reliability of animal tests.

[0074] like Figure 2 and Figure 3 As shown, the base assembly 1 includes a fixed base 11, mounting seats 14, and a bed beam connecting assembly. The fixed base 11 is laid on the operating table and extends along a first horizontal direction. Two mounting seats 14 are provided: a tibia mounting seat 14b and a femur mounting seat 14a, respectively. The tibia mounting seat 14b and femur mounting seat 14a are spaced apart on the fixed base 11 along the first horizontal direction, and at least one mounting seat 14 is slidably connected to the fixed base 11 to adjust the distance between the two mounting seats 14. The bed beam connecting assembly is used to mount the base assembly 1 onto the operating table. The bed beam connecting assembly can slide along the extension direction of the side beam of the operating table and lock relative to the side beam after sliding, thereby achieving position adjustment and fixation of the base assembly 1 on the operating table. This ensures that the installation position of the animal leg fixation device meets surgical requirements, improving the convenience and reliability of animal experimental surgeries.

[0075] Furthermore, the bed beam connection assembly includes an adjusting rod 12 and a beam fixing assembly 13. The adjusting rod 12 includes a vertically connected adjusting crossbar portion 121 and an adjusting longitudinal bar portion 122. The adjusting crossbar portion 121 extends along a second horizontal direction and is connected to a fixed base 11. The mounting position of the fixed base 11 on the adjusting crossbar portion 121 is adjustable in the second horizontal direction. The adjusting longitudinal bar portion 122 extends downward and its upper end is connected to the adjusting crossbar portion 121. The beam fixing assembly 13 is mounted on the adjusting longitudinal bar portion 122, and the mounting position of the beam fixing assembly 13 on the adjusting longitudinal bar portion 122 is adjustable in the vertical direction. The beam fixing assembly 13 is used for sliding connection with the bed side crossbeam.

[0076] By adjusting the installation position of the beam fixing assembly 13 on the adjusting longitudinal bar 122 in the vertical direction, the height between the beam fixing assembly 13 and the fixing base 11 can be adjusted. This allows the base assembly 1 to be adapted to the installation of surgical beds with different distances between the bed side crossbeam and the upper surface of the operating bed, ensuring that the base assembly 1 can be installed on different types of surgical beds and improving the flexibility and convenience of using the animal leg fixation device. By adjusting the installation position of the fixing base 11 on the adjusting crossbar 121 in the second horizontal direction, the position of the fixing base 11 in the width direction of the operating bed can be adjusted, thereby changing the horizontal distance between the fixing base 11 and the side of the operating bed. In other words, by adjusting the fixing base 11, the animal leg fixation device can be tested close to either side of the operating bed, improving the flexibility of the test and making it applicable to the use of surgical beds of different widths, thus improving the versatility of the animal leg fixation device and reducing the cost of using the animal leg fixation device.

[0077] To improve the installation stability of the fixed base 11, two bed beam connecting assemblies are spaced apart along the first horizontal direction. This increases the number of connection points between the bed beam connecting assemblies and the bed side beams and the fixed base 11, thereby improving the installation stability of the base assembly 1 on the operating table and the force balance of the fixed base 11. In other embodiments, only one bed beam connecting assembly may be provided, or multiple assemblies may be spaced apart along the first horizontal direction.

[0078] To improve the ease of connection between the fixed base 11 and the adjusting rod 12, the fixed base 11 includes a plate-shaped base portion 111. The base portion 111 includes a sliding plate portion 1111 and end plate portions 1112 disposed at both ends of the sliding plate portion 1111. The sliding plate portion 1111 extends along a first horizontal direction, and the width of the sliding plate portion 1111 in a second horizontal direction is smaller than the width of the end plate portion 1112 in the second horizontal direction. The two adjusting rods 12 are respectively connected to the two end plate portions 1112. This reduces the overall size of the fixed base 11 while increasing the contact area between the adjusting rod 12 and the fixed base 11, thereby improving the reliability and stability of the connection between the fixed base 11 and the adjusting rod 12.

[0079] A transverse sliding groove 1114 is provided on the lower surface of the end plate portion 1112. The transverse sliding groove 1114 extends along the second horizontal direction and passes through the end plate portion 1112. The adjusting crossbar portion 121 is slidably disposed in the transverse sliding groove 1114, thereby ensuring the accuracy of the adjustment direction of the fixed base 11 relative to the adjusting crossbar portion 121, preventing relative rotation between the fixed base 11 and the adjusting rod 12, and improving the assembly reliability of the base assembly 1. The groove depth of the transverse sliding groove 1114 is greater than or equal to the thickness of the adjusting crossbar portion 121 to prevent the adjusting crossbar portion 121 from protruding from the lower surface of the base plate portion 111.

[0080] To ensure the positional stability of the fixed base 11 and the adjusting rod 12 after adjustment, in this embodiment, the adjusting crossbar portion 121 has multiple horizontal adjusting threaded holes 1211 along its extension direction, and the end plate portion 1112 has a horizontal locking hole 1113, which can be aligned with any of the horizontal adjusting threaded holes 1211. The base assembly 1 also includes a horizontal adjusting fastener 16, which passes through the aligned horizontal locking holes 1113 and horizontal adjusting threaded holes 1211 from top to bottom to fasten the adjusted adjusting crossbar portion 121 and the fixed base 11. The horizontal adjusting fastener 16 is preferably a locking knob to improve the convenience of adjustment.

[0081] The end plate portion 1112 preferably has transverse locking holes 1113 at both ends along the second horizontal direction, thereby allowing the beam fixing assembly 13 to be disposed on either side of the fixing base 11 along the second horizontal direction.

[0082] Preferably, the fixed base 11 is symmetrically arranged with respect to the preset plane, and the preset plane is perpendicular to the second horizontal direction, thereby better ensuring that the fixed base 11 can be installed on either side of the operating table.

[0083] like Figure 4 and Figure 5 As shown, the beam fixing assembly 13 includes a beam sliding seat and a beam locking fastener 134. The beam sliding seat has a cavity extending along a second horizontal direction. The adjusting rod portion 122 slides through the upper and lower cavity walls. The adjusting rod portion 122 and the cavity wall together form a beam groove 1313, which is used to slide the bed side crossbeam. The beam locking fastener 134 is arranged along the second horizontal direction and threaded onto the beam sliding seat. The beam locking fastener 134 and the beam groove 1313 are located on opposite sides of the adjusting rod portion 122. The screw end of the beam locking fastener 134 can press against the adjusting rod portion 122, so that the adjusting rod portion 122 and the groove wall of the beam groove 1313 clamp the bed side crossbeam.

[0084] The structure of the beam fixing assembly 13 described above allows for the fastening of the adjusting longitudinal rod 122, the bed side crossbeam, and the beam sliding seat using a single beam locking fastener 134. This reduces the number of locking fasteners, simplifies the structure of the beam fixing assembly 13, and consequently simplifies the structure of the base assembly 1, reducing the cost of the base assembly 1 and the animal leg fixing device. In other embodiments, the beam sliding seat and the adjusting longitudinal rod 122 may have separate locking fasteners, with the beam locking fastener 134 only securing the beam fixing seat to the bed side crossbeam.

[0085] The beam sliding seat includes a U-shaped seat 131 and a locking rod 132. The U-shaped seat 131 has two seat sides 1311 spaced apart vertically and a seat cross section 1312 connected between the two seat sides 1311. An adjusting rod section 122 slides through the two seat sides 1311 and surrounds the U-shaped seat 131 to form a beam sliding groove 1313. The locking rod 132 passes through the two seat sides 1311 and is detachably connected to the U-shaped seat 131. The locking rod 132 is located on the side of the adjusting rod section 122 opposite to the seat cross section 1312. A beam locking fastener 134 is threaded onto the locking rod 132. By providing a detachably connected U-shaped seat 131 and locking rod 132, the ease of assembly and disassembly of the beam sliding seat from the bed side crossbeam and the adjusting rod section 122 can be improved, and the processing difficulty of the beam sliding seat can be reduced. In other embodiments, the beam sliding seat can also be U-shaped and integrally formed.

[0086] Both sides 1311 of the seat have rod through holes 1314, which are arranged vertically opposite each other. The adjusting rod part 122 slides through the two rod through holes 1314. The adjusting rod part 122 is preferably a plate-shaped structure and is perpendicular to the second horizontal direction. The shape of the rod through hole 1314 is the same as the shape of the adjusting rod part 122 to avoid the adjusting rod part 122 sliding relative to the U-shaped seat 131.

[0087] To ensure the reliability of the beam locking fastener 134's pressure against the adjusting longitudinal rod portion 122, preferably, a pressure groove 1223 is provided on the side of the adjusting longitudinal rod portion 122 facing the beam locking fastener 134. The pressure groove 1223 extends vertically, and the end of the beam locking fastener 134 presses against the bottom of the pressure groove 1223. This prevents the end of the beam locking fastener 134 from slipping off relative to the adjusting longitudinal rod portion 122, ensuring that the direction of the pressure applied is perpendicular to the adjusting longitudinal rod portion 122. The pressure groove 1223 is preferably an arc-shaped groove.

[0088] To improve the installation stability of the base assembly 1 and the bed side beam, at least one of the groove walls on opposite sides of the beam groove 1313 along the second horizontal direction is provided with a plurality of teeth 1221. The teeth 1221 are used to increase the contact friction with the bed side beam, thereby improving the fixing stability of the bed side beam in the beam groove 1313.

[0089] In this embodiment, the teeth 1221 are provided on the adjusting longitudinal rod portion 122. In other embodiments, the teeth 1221 may also be provided on the seat horizontal portion 1312, or the teeth 1221 may be provided on both the seat horizontal portion 1312 and the adjusting longitudinal rod portion 122. Preferably, the teeth 1221 extend along the first horizontal direction and are provided in multiples at intervals along the vertical direction.

[0090] The lower end of the adjusting rod portion 122 is preferably arc-shaped to improve the smoothness of insertion of the adjusting rod portion 122 into the rod through hole 1314. The adjusting rod portion 122 is preferably provided with rod weight-reducing holes 1222 to reduce the weight of the adjusting rod 12, thereby reducing the weight of the base assembly 1 and improving the ease of use and handling of the animal leg fixing device. Preferably, multiple rod weight-reducing holes 1222 are spaced apart along the extending direction of the adjusting rod portion 122.

[0091] The locking rod 132 includes a main rod portion 1321 and a threaded rod portion 1322 connected to one end of the main rod portion 1321. The main rod portion 1321 has a non-circular cross-section and a locking threaded hole 1324 is formed through it. The main rod portion 1321 is vertically inserted into at least one side portion 1311, and the threaded rod portion 1322...

[0092] The beam fixing assembly 13 extends outward from the U-shaped seat 131. It also includes a locking nut 133, located on the outside of the U-shaped seat 131 and threadedly connected to the screw portion 1322. The end face of the locking nut 133 abuts against the adjacent seat side portion 1311. By configuring the screw portion 1322 and the locking nut 133, a stable connection between the locking rod 132 and the U-shaped seat 131 can be achieved. Furthermore, by designing the cross-section of the main rod portion 1321 as a non-circular structure, rotation of the locking rod 132 relative to the U-shaped seat 131 can be prevented, ensuring the accurate orientation of the locking threaded hole 1324 on the main rod portion 1321. This improves the assembly efficiency and reliability of the beam fixing assembly 13 and the bed side beam.

[0093] Furthermore, a round rod portion 1323 is coaxially connected between the screw portion 1322 and the main rod portion 1321. One of the two seat side portions 1311 has a first through hole 1315, and the other has a second through hole 1316. The shape of the first through hole 1315 is the same as the cross-sectional shape of the main rod portion 1321, and the shape of the second through hole 1316 is the same as the shape of the round rod portion 1323. The main rod portion 1321 passes through the first through hole 1315, and the round rod portion 1323 passes through the second through hole 1316. The end faces of the main rod portion 1321 and the round rod portion 1323 abut against the inner surface of the seat side portion 1311. This enables the locking rod 132 to be inserted and positioned in a limited manner with the U-shaped seat 131, thereby improving assembly efficiency.

[0094] To improve the ease of assembly of the locking rod 132, a gripping part 1325 is connected to the end of the main rod portion 1321 away from the round rod portion 1323. The gripping part 1325 is located on the outside of the U-shaped seat 131 and is used to improve the ease of insertion and removal of the locking rod 132 by the user. Preferably, the gripping part 1325 is an arc ring structure, with both ends of the arc ring structure connected to the main rod portion 1321. The locking rod 132 is preferably integrally formed to reduce processing costs and improve the overall structural strength and rigidity of the locking rod 132.

[0095] like Figure 3 and Figure 6 As shown, in this embodiment, both mounting seats 14 are slidably connected to the fixing base 11, which improves the ease of adjustment of the mounting seats 14, thereby improving the flexibility of position adjustment of the tibial fixation assembly 3 and the femoral fixation assembly 2, and better meeting the position adjustment needs of animal experimental surgery.

[0096] To improve the smoothness of the sliding of the mounting base 14 on the fixed base 11, a slide rail portion 112 is provided on the upper surface of the base plate portion 111. The slide rail portion 112 extends along the first horizontal direction, and a guide groove is provided on the lower surface of the mounting base 14. The slide rail portion 112 is slidably disposed in the guide groove, thereby allowing the mounting base 14 to slide along the guide groove.

[0097] To prevent the mounting base 14 from detaching from the slide rail 112 in the vertical direction, the slide rail 112 has a trapezoidal cross-section with a larger upper end and a smaller lower end. The shape of the guide groove matches the cross-sectional shape of the slide rail 112, thereby limiting the mounting base 14 on the slide rail 112 and improving the stability of the mounting base 14 on the fixed base 11. Chamfers are provided on both sides of the upper end of the slide rail 112 along the second horizontal direction to reduce the scraping of the slide rail 112 against the mounting base 14.

[0098] To prevent the mounting base 14 from moving freely relative to the fixed base 11 after adjustment, the base assembly 1 also includes a base locking unit 15. The base locking unit 15 is detachably connected to both the fixed base 11 and the mounting base 14 to lock the adjusted mounting base 14 onto the fixed base 11.

[0099] In this embodiment, the fixed base 11 has a mounting hole 114 along the first horizontal direction, which extends from top to bottom through the slide rail portion 112 and the slide plate portion 1111. The base locking unit 15 includes a locking threaded component 151 and a locking nut 152. The locking threaded component 151 passes through the mounting hole 114 and the mounting base 14 from bottom to top. The locking nut 152 is screwed onto the threaded rod of the locking threaded component 151 and abuts against the upper end face of the mounting base 14. The threaded head of the locking threaded component 151 presses upward against the fixed base 11. This configuration allows the mounting base 14 and the fixed base 11 to be clamped between the locking nut 152 and the threaded head of the locking thread 151, improving the reliability of the fastening. At the same time, when it is necessary to slide the mounting base 14, tightening the locking nut 152 removes the downward pressure applied to the mounting base 14, thereby reducing the pressure between the mounting base 14 and the fixed base 11, which allows the mounting base 14 to slide without completely disassembling the mounting base locking unit 15. This improves the convenience of sliding adjustment and locking after adjustment, and reduces the probability of the mounting base locking unit 15 being lost.

[0100] In other embodiments, the seat locking unit 15 may also be a fastening screw, which is screwed onto the mounting base 14 from top to bottom, and the end of the fastening screw presses against the slide rail portion 112. The fastening force applied to the slide rail portion 112 by the fastening screw achieves the fastening between the slide rail portion 112 and the mounting base 14.

[0101] Furthermore, the mounting hole 114 is a stepped hole, comprising a small hole and a large hole that are connected vertically. The screw of the locking threaded component 151 passes through the small hole, and the screw head is located in the large hole and abuts against the stepped surface between the large and small holes. This achieves pressure of the screw head against the fixed base 11, while preventing the screw head from extending downwards out of the fixed base 11, ensuring the flatness of the lower surface of the fixed base 11. The screw head has two opposing limiting planes, which respectively fit against the two opposite side walls of the large hole in the second horizontal direction. This prevents the locking threaded component 151 from rotating relative to the fixed base 11, and prevents the locking threaded component 151 and the locking nut 152 from rotating and loosening.

[0102] The mounting base 14 is slidably mounted on the slide rail 112 along one side of the slide rail 112. To prevent the mounting base 14 from dislodging from the slide rail 112 in the first horizontal direction, a sliding limiting member 113 is provided at one end of the base plate 111. The sliding limiting member 113 is located outside one end of the slide rail 112, thereby restricting the mounting base 14 from dislodging from the slide rail 112. In this embodiment, one sliding limiting member 113 is provided and is integrally formed or welded to the base plate 111. In other embodiments, sliding limiting members 113 can be provided at both ends of the base plate 111, and at least one sliding limiting member 113 is detachably connected to the base plate 111.

[0103] In this embodiment, the tibia mounting base 14b includes a slide 141 and an extension 142. The slide 141 is slidably connected to the fixation base 11. One end of the extension 142 is connected to the side of the slide 141 away from the femoral mounting base 14a, and the other end of the extension 142 extends obliquely upward in a direction away from the femoral mounting base 14a. The lower end of the tibia fixation assembly 3 is rotatably connected to the upper end of the extension 142. This configuration can reduce the distance between the two mounting bases 14 while keeping the rotation adjustment range of the tibia fixation assembly 3 unchanged. This reduces the length requirement of the slide rail 112 while ensuring the sliding adjustment stroke of the slide 141, thereby reducing the length requirement of the fixation base 11 in the first horizontal direction, reducing the size and weight of the animal leg fixation device, and lowering the cost of the animal leg fixation device.

[0104] In other embodiments, the femoral mounting base 14a includes a slide 141 and an extension 142. The slide 141 is slidably mounted on the fixed base 11. One end of the extension 142 is connected to the slide 141, and the other end of the extension 142 extends obliquely upward in a direction away from the tibial mounting base 14b. The lower end of the femoral support 21 is rotatably connected to the upper end of the extension 142.

[0105] like Figure 1 As shown, the lower ends of the femoral fixation assembly 2 and the tibial fixation assembly 3 are both connected to the mounting base 14 via the rotation adjustment assembly 5, so as to realize the rotation adjustment of the femoral fixation assembly 2 and the tibial fixation assembly 3 around the second horizontal direction, respectively. Since the rotation adjustment structures of the femoral fixation assembly 2 and the tibial fixation assembly 3 are the same, for ease of description, the femoral support 21 and the tibial support 31 are collectively referred to as bone supports, and the bone supports and the rotation adjustment assembly 5 form a rotational connection structure.

[0106] Specifically, such as Figures 7 to 10 As shown, the rotation adjustment assembly 5 includes a rotation mounting shaft 51, a rotation seat 54, and a rotation limiting member 52. The rotational connection end of the bone support member is rotatably connected to the rotation seat 54 via the rotation mounting shaft 51. The rotation mounting shaft 51 extends along a second horizontal direction, and the rotation seat 54 is mounted on the corresponding mounting base 14. The rotation limiting member 52 is used to fix the rotation seat 54 and the rotational connection end after rotation adjustment. The rotational connection end of the bone support member is either the lower end of the tibial support member 31 or the lower end of the femoral support member 21.

[0107] The end face of the rotating connection end is provided with an adjustment hole 214 extending along the second horizontal direction. N adjustment holes 214 are evenly spaced around the circumference of the rotating mounting shaft 51. The rotating seat 54 is provided with two sets of fixing holes 541 extending along the second horizontal direction. The two sets of fixing holes 541 respectively include a first fixing hole 541a and a second fixing hole 541b. The first fixing hole 541a and the second fixing hole 541b are spaced apart circumferentially, and the central angle between the first fixing hole 541a and the adjacent second fixing hole 541b is α. Where α < π and m is a natural number. The rotating connection end can rotate about the rotating mounting shaft 51 so that the adjusting hole 214 can be selectively aligned with the first fixing hole 541a or the second fixing hole 541b. The rotating limiting member 52 includes a post 521, which can be inserted into the aligned fixing hole 541 and adjusting hole 214.

[0108] Depend on Figure 10 and Figure 11 As shown, since N adjusting holes 214 are evenly spaced along the circumference at the rotating connection end, the central angle between two adjacent adjusting holes 214 is β, where β = π / N. The central angles corresponding to the first fixing hole 541a and the second fixing hole 541b are also related. This ensures that the first fixing hole 541a and the second fixing hole 541b are not simultaneously aligned with the adjusting hole 214. When the adjusting hole 214 is aligned with the first fixing hole 541a, the number of adjusting holes 214 between the first fixing hole 541a and the adjacent second fixing hole 541b is m, and the central angle between the second fixing hole 541b and the adjacent adjusting hole 214 is Φ, where Φ = α - mβ = π / N. That is, after rotating the connecting end by another angle Φ, the adjusting hole 214 is aligned with the second fixing hole 541b. Similarly, when the adjusting hole 214 is aligned with the second fixing hole 541b, after rotating the connecting end by another angle Φ, the adjusting hole 214 is aligned with the first fixing hole 541a.

[0109] As can be seen from the above, by setting the first fixing hole 541a and the second fixing hole 541b, and making the central angle between adjacent first fixing holes 541a and second fixing holes 541b α, This design allows the minimum adjustable angle of the rotating connection end to be Φ = π / N with each rotation. In contrast, the conventional method, which only aligns one set of fixing holes 541 with the adjusting holes 214, results in a minimum adjustable angle of β = 2π / N for the rotating connection end. Therefore, the above design allows for a smaller minimum adjustable angle without increasing the number of adjusting holes 214, thus increasing the precision of the rotation adjustment. Furthermore, compared to conventional stepless adjustment, after adjustment, the rotating connection end and the rotating seat 54 can be fixed by inserting a pin 521 through the aligned fixing holes 541 and adjusting holes 214, preventing the rotating connection end from rotating relative to the rotating seat 54. This improves the stability of the rotating connection structure after adjustment, ensuring the rotating connection end reliably maintains the adjusted angle and enhancing the reliability and flexibility of the rotating connection structure.

[0110] To simplify the machining of the rotating seat 54, in this embodiment, n fixing holes 541 are evenly spaced along the circumference of the rotating mounting shaft 51, and the first fixing holes 541a and the second fixing holes 541b are staggered along the circumference of the rotating mounting shaft 51, 3n = 2N. This ensures that the fixing holes 541 on the rotating seat 54 are evenly distributed, reducing the machining requirements of the rotating seat 54. At the same time, this arrangement increases the number of first fixing holes 541a and second fixing holes 541b that are simultaneously aligned with the adjustment hole 214, thereby increasing the number of insertion pins 521 or the flexibility of the insertion position of the insertion pins 521, and improving the stability and flexibility of the locking of the rotating connection end and the rotating seat 54 after adjustment. In other embodiments, multiple first fixing holes 541a may be provided at intervals along the circumference, and the number of second fixing holes 541b and first fixing holes 541a may be the same and staggered in the circumference. As long as multiple first fixing holes 541a can be aligned with multiple adjusting holes 214 at the same time, or multiple second fixing holes 541b can be aligned with multiple adjusting holes 214.

[0111] Furthermore, the number of insertion pins 521 is the same as the number of first fixing holes 541a, and multiple insertion pins 521 can be inserted one-to-one into the first fixing hole 541a or the second fixing hole 541b. This ensures that after the angle adjustment is completed, the rotating connection end and the rotating seat 54 are simultaneously inserted by multiple insertion pins 521, increasing the number of fixed positions of the rotating connection end and the rotating seat 54, thereby improving the connection stability and reliability of the rotating connection end and the rotating seat 54.

[0112] In this embodiment, there are 12 adjustment holes 214 and a total of 8 fixing holes 541, i.e., N=12, n=8, α=45°, β=30°, Φ=15°. This can increase the adjustment accuracy while reducing the size requirements of the rotating connection end and improving the processing convenience of the rotating connection end.

[0113] like Figure 7and Figure 8 As shown, to improve the ease of insertion and removal of the insertion post 521, the rotation limiting member 52 further includes a connecting block portion 522. The insertion post 521 is perpendicularly connected to the connecting block portion 522, and the connecting block portion 522 abuts against the side of the rotating seat 54 away from the rotating connection end. That is, during adjustment, the insertion post 521 can be pulled out by removing the connecting block portion 522, and the abutment between the connecting block portion 522 and the rotating seat 54 limits the depth of insertion of the insertion post 521 into the adjustment hole 214 and the fixing hole 541, improving the ease of insertion. In this embodiment, all insertion posts 521 are perpendicularly connected to the connecting block portion 522, and multiple insertion posts 521 are evenly spaced around the circumference of the rotating mounting shaft 51.

[0114] Four insertion posts 521 are provided, and the connecting block portion 522 is preferably provided with a rectangular block structure to ensure the installation and positioning of the four insertion posts 521 while reducing the size of the connecting block portion 522. In other embodiments, the connecting block portion 522 may also be a cylindrical structure.

[0115] The first end of the rotating mounting shaft 51 has a pressing head 513, and the second end of the rotating mounting shaft 51 is detachably connected to a rotating locking member 53. The rotating seat 54, the rotating connecting end, and the rotating limiting member 52 are clamped between the pressing head 513 and the rotating locking member 53. This arrangement allows the rotating seat 54, the rotating connecting end, and the rotating limiting member 52 to be stably clamped between the pressing head 513 and the rotating locking member 53, thereby pressing against the rotating limiting member 52 and preventing the insert 521 of the rotating limiting member 52 from coming out of the fixing hole 541. This eliminates the need for a connecting structure between the rotating limiting member 52 and the mounting seat 14, ensuring the stability of the rotating limiting member 52 and thus the stability between the rotating connecting end and the mounting seat 14. When a rotating connection is required, the rotating locking member 53 can be removed from the rotating mounting shaft 51, allowing the insert 521 to be pulled out of the fixing hole 541, thereby enabling adjustment of the rotating connecting end.

[0116] In this embodiment, the second end of the rotating mounting shaft 51 has a threaded shaft portion 512, and the end face of the rotating locking member 53 has an internal threaded hole, with the threaded shaft portion 512 screwed into the internal threaded hole. This improves the ease of connection and disassembly of the rotating mounting shaft 51 and the rotating locking member 53, and allows adjustment of the resistance applied by the rotating locking member 53 to the rotating limiting member 52 by screwing the rotating locking member 53 relative to the threaded shaft portion 512.

[0117] The rotating mounting shaft 51 also has a smooth shaft portion 511 connected between the pressing head 513 and the threaded shaft portion 512. The smooth shaft portion 511 is coaxially connected to the threaded shaft portion 512 and passes through the rotating seat 54 and the rotating connection end, thereby preventing the rotating connection end and the rotating seat 54 from rubbing against the external threads on the rotating mounting shaft 51. Preferably, the rotating mounting shaft 51 has a through-hole to reduce its weight, thereby reducing the weight of the rotating structure. In other embodiments, the rotating mounting shaft 51 may also be a solid shaft.

[0118] The end of the rotating locking member 53 away from the rotating limiting member 52 is provided with a clearance hole. The clearance hole is connected to the internal thread hole, and the threaded shaft part 512 can extend into the clearance hole to avoid the threaded shaft part 512 and the rotating locking member 53 from being squeezed and interfered, thereby improving the reliability of the rotating locking member 53 and the rotating mounting shaft 51.

[0119] The rotating locking member 53 preferably includes a locking sleeve portion 531 and a locking knob portion 532. The locking sleeve portion 531 is connected to the end of the locking knob portion 532 facing the rotation limiting member 52. The locking sleeve portion 531 has the aforementioned internal threaded hole and its end abuts against the end face of the connecting block portion 522. The rotating knob portion has the aforementioned clearance hole, and the cross-sectional area of ​​the rotating knob portion is larger than the connecting area of ​​the locking sleeve portion 531, so as to improve the convenience and comfort of the user in rotating the locking member 53. Preferably, the outer peripheral surface of the locking knob portion 532 has multiple grooves along the circumferential direction to increase the friction between the user's hand and the locking knob portion 532, thereby improving the reliability of rotation; at the same time, the grooves also facilitate the use of tools such as wrenches to rotate the locking member 53.

[0120] In this embodiment, two rotating seats 54 are spaced apart along the second horizontal direction, and the rotating connecting end is sandwiched between the two rotating seats 54. The rotating mounting shaft 51 passes through the two rotating seats 54. This allows the rotating connecting end to be located between the two rotating seats 54, improving the installation reliability of the rotating connecting end on the rotating seats 54 and improving the force balance of the rotating connecting end. In other embodiments, only one rotating seat 54 may be provided.

[0121] In this embodiment, the pressing head 513 abuts against a rotating seat 54, and the rotation limiting member 52 is clamped between the rotation locking member 53 and another rotating seat 54. Thus, by rotating the rotation locking member 53 out of the threaded shaft portion 512, the rotation limiting member 52 can be removed without removing the rotating mounting shaft 51 from the rotating seat 54 and the rotating connection end, improving the convenience of adjusting the rotation and locking after adjustment.

[0122] Furthermore, the end of the pressing head 513 facing the rotating seat 54 has a protruding post 514, which is inserted into the fixing hole 541 of the adjacent rotating seat 54. This allows the rotating mounting shaft 51 to remain fixed relative to the rotating seat 54 after the rotating connection structure is assembled, thereby preventing the rotating mounting shaft 51 from being driven to rotate when the rotating locking member 53 is screwed on, and improving the convenience of screwing, installing and disassembling the rotating locking member 53.

[0123] In this embodiment, four protruding pillars 514 are provided, and the four protruding pillars 514 are evenly spaced along the circumference of the rotating mounting shaft 51. The four protruding pillars 514 can be inserted into four fixing holes 541, improving the connection reliability between the rotating mounting shaft 51 and the rotating seat 54. In other embodiments, two, three, or other numbers of protruding pillars 514 may be provided, as long as all protruding pillars 514 can be inserted into the fixing holes 541 simultaneously.

[0124] In this embodiment, adjustment holes 214 are provided on both sides of the rotating connection end along the second horizontal direction. The adjustment holes 214 are blind holes, and the adjustment holes 214 on both sides are provided one-to-one. This arrangement allows the rotating connection end to be aligned with the fixing hole 541 of the rotating seat 54 on either side, thereby adjusting the installation position of the rotating limit member 52 according to the usage requirements of the rotating connection structure, which improves the convenience and flexibility of the rotating connection structure.

[0125] In other embodiments, the adjustment hole 214 passes through the rotating connection end in the second horizontal direction, which can also enable the adjustment hole 214 to cooperate with the mounting base 14 on either side.

[0126] In this embodiment, the rotating seat 54 is generally plate-shaped and perpendicular to the second horizontal direction to simplify its structure. The rotating seat 54 can be connected to the corresponding mounting seat 14 by welding or integral molding. In other embodiments, the two rotating seats 54 can also be connected by a connecting part, which is welded to or detachably connected to the corresponding mounting seat 14.

[0127] like Figure 11As shown, the femoral support 21 preferably adopts a rod-like structure to simplify its structure, reduce its weight, and lower costs while providing support for the animal's femur. In animal knee joint experiments, sheep legs are typically used. The sheep femur is smaller on the side closer to the knee joint and larger and heavier on the side farther from it, with the center of gravity shifting outwards on the side furthest from the knee joint. To improve the stability of the sheep femur support, the femoral support 21 includes a first support rod 211, a second support rod 212, and a third support rod 213 connected sequentially from bottom to top. Both the first and third support rods 211 extend upwards at an angle away from the femoral mounting base 14a, and are staggered in the second horizontal direction. The length of the third support rod 213 is greater than twice the length of the first support rod 211. The femoral fixation component 22 is installed on the third support rod portion 213, and the femoral fixation component 22 has a femoral clamping unit. The femoral clamping unit, the tibia fixation component 32 and the first support rod portion 211 are arranged facing each other in the first horizontal direction.

[0128] The above configuration allows the lower and upper ends of the femoral support 21 to be offset in the second horizontal direction, thereby enhancing the support of the lower end of the femoral support 21 and allowing the support position of the lower end to deviate from the knee joint fixation position, thus improving the reliability and stability of the support for the femur of the sheep leg. At the same time, this configuration avoids changing the position of the femoral mounting seat 14a, allowing the two rotation adjustment components 5 to adopt the same structure, thus improving the versatility of the rotation adjustment components 5. Furthermore, the femoral clamping unit and the tibial fixation component 32 are both positioned opposite each other in the first horizontal direction, ensuring stable clamping near the knee joint of the sheep leg and preventing the clamping position from shifting.

[0129] Preferably, the second support rod portion 212 is connected to the first support rod portion 211 and the third support rod portion 213 by a rounded transition to reduce stress concentration and improve the structural reliability of the femoral support member 21. The cross-section of the femoral support member 21 is preferably rectangular, and one side of the rectangle is perpendicular to the second horizontal direction to improve the ease and reliability of installing the femoral fixation assembly 22 on the femoral support member 21.

[0130] In this embodiment, the mounting position of the femoral fixation component 22 on the femoral support 21 is adjustable in the extending direction of the femoral support 21. This allows for adjustment of the distance between the femoral fixation component 22 and the femoral mounting base 14a, while also simplifying the structure of the femoral support 21. In other embodiments, the extending length of the femoral support 21 may also be adjustable, thereby adjusting the distance between the femoral fixation component 22 and the femoral mounting base 14a by adjusting the length of the femoral support 21.

[0131] like Figure 12 and Figure 13 As shown, the third support rod portion 213 extends along its extension direction and is provided with a plurality of adjustment through holes 215 at intervals. The femoral fixation assembly 22 has a fastening through hole, which can be aligned with any of the adjustment through holes 215. The femoral fixation assembly 2 also includes a femoral locking member 23, which passes through the aligned fastening through holes and adjustment through holes 215 to fasten the adjusted femoral fixation assembly 22 and femoral support member 21. Specifically, the femoral fixation assembly 22 includes a femoral clamping seat 221, on which a femoral clamping unit is mounted. The femoral clamping seat 221 has the aforementioned locking through hole 2211.

[0132] The femoral locking component 23 includes a locking threaded component 231 and a femoral locking knob 232. The screw of the locking threaded component 231 passes through the aligned adjustment through hole 215 and the locking through hole 2211, and the screw head abuts against the femoral clamping seat 221. The femoral locking knob 232 is located on the side of the femoral support component 21 away from the clamping seat, and the femoral locking knob 232 is threadedly connected to the end of the screw of the locking threaded component 231. The femoral locking knob 232 abuts against the femoral support component 21, so that the femoral support component 21 and the femoral clamping seat 221 are clamped between the screw head and the femoral locking knob 232.

[0133] The adjusting through hole 215 is a stepped hole and includes a connected circular hole portion 2151 and an anti-rotation hole portion 2152. The circular hole portion 2151 is located on the side of the anti-rotation hole portion 2152 facing the femoral locking knob 232. The shape of the locking through hole 2211 is adapted to the anti-rotation hole portion 2152. The locking threaded component 231 includes an anti-rotation rod portion located between the thread at the end of the screw and the screw head. The cross-section of the anti-rotation rod portion is larger than the cross-section of the screw and is non-circular. The shape of the anti-rotation hole portion 2152 is the same as the shape of the anti-rotation rod portion. The anti-rotation rod portion is inserted between the aligned fastening through hole and the anti-rotation hole portion 2152, and the end of the anti-rotation rod portion abuts against the bottom of the hole in the anti-rotation hole portion 2152. The locking threaded component 231 passes through the circular hole portion 2151, exits the femoral support component 21, and connects to the femoral locking knob 232. Therefore, the relative rotation of the locking threaded part 231 with the femoral support 21 and the femoral clamp 221 can be avoided, and the rotation of the locking threaded part 231 when the femoral locking knob 232 is turned can be avoided, thus improving the ease of turning the femoral locking knob 232. At the same time, this arrangement can prevent the relative rotation of the femoral support 21 and the femoral clamp 221, ensuring the reliability of the installation angle of the femoral clamp 221 on the femoral support 21.

[0134] In this embodiment, the cross-section of the anti-rotation rod is oblong. In other embodiments, the cross-section of the anti-rotation rod can also be rectangular, D-shaped, or other shapes.

[0135] Preferably, the installation position of the femoral fixation component 22 on the femoral support 21 is adjustable along a third direction, which is perpendicular to both the second horizontal direction and the extension direction of the femoral support 21. This allows adjustment of the position of the femoral clamping unit from the femoral support 21, improving the adaptability and flexibility of femoral clamping.

[0136] Specifically, at least two locking through holes 2211 are provided at intervals along a third direction, so as to adjust the position of the femoral clamping unit relative to the femoral support member 21 by selecting the locking through hole 2211 aligned with the adjustment through hole 215.

[0137] The femoral clamping unit includes femoral clamping plates 222, which are arranged opposite to each other and spaced apart along a second horizontal direction. At least one femoral clamping plate 222 is mounted on a femoral clamping seat 221. The femur of the animal leg is clamped on the femoral clamping plates 222, and the two femoral clamping plates 222 are detachably connected by clamping fasteners. The clamping fasteners are preferably bone pins. Specifically, the femoral clamping plates 222 are provided with a plurality of needle holes 2221, and the needle holes 2221 of the two femoral clamping plates 222 are arranged opposite to each other, with bone pins passing through the needle holes 2221 of the two femoral clamping plates 222.

[0138] In this embodiment, the femoral clamping seat 221 is L-shaped and includes a rod connecting part and a plate connecting part. The rod connecting part is in close contact with the femoral support member 21, and the rod connecting part is provided with the aforementioned locking through hole 2211. The plate connecting part extends away from the femoral support member 21 along the second horizontal direction, so that the femoral clamping plate 222 is directly opposite to the lower end of the femoral support member 21 in the first horizontal direction, ensuring the fixation stability of the animal's knee joint and preventing the femoral clamping position of the animal's leg from deviating from the position of the knee joint.

[0139] In this embodiment, one femoral clamping plate 222 is fixed to the femoral clamping seat 221, while the other femoral clamping plate 222 is separated from the femoral clamping seat 221 and is in a free state. This simplifies the structure of the femoral fixation assembly 2 and reduces the overall cost of the animal leg fixation device.

[0140] like Figure 14 and Figure 15 As shown, in this embodiment, the length of the tibial support 31 is adjustable, thereby adjusting the distance between the tibial fixation assembly 32 and the tibial mount 14b. In other embodiments, the mounting position of the tibial fixation assembly 32 on the tibial support 31 may also be adjustable in the extending direction of the tibial support 31.

[0141] The tibial support 31 includes a fixed support 311 and an adjusting support 312. The lower end of the fixed support 311 is rotatably connected to the mounting base 14. The fixed support 311 extends obliquely upward in the direction toward the femoral fixation assembly 2. The adjusting support 312 is slidably disposed on the fixed support 311. The tibial fixation assembly 32 is mounted on the adjusting support 312. That is, in this embodiment, by adjusting the sliding of the adjusting support 312 on the fixed support 311, the position of the tibial fixation assembly 32 is changed, thereby simplifying the connection structure between the tibial fixation assembly 32 and the tibial support 31.

[0142] One of the fixed support 311 and the adjusting support 312 is provided with an adjusting groove 3111, and the other is provided with a guide rail 3121. The guide rail 3121 and the adjusting groove 3111 extend in the same direction, and the guide rail 3121 is slidably inserted into the adjusting groove 3111. The adjusting groove 3111 is preferably a dovetail groove, and the shape of the guide rail 3121 is adapted to the shape of the adjusting groove 3111 to prevent the guide rail 3121 from dislodging from the adjusting groove 3111, thus ensuring the smoothness and reliability of the sliding of the fixed support 311 and the adjusting support 312.

[0143] The tibial fixation assembly 3 also includes fasteners for securing the adjusted fixation support 311 and adjustment support 312. Preferably, the bottom of the adjustment groove 3111 has a fastening through hole, and the adjustment support 312 has a fastening connection hole. The fastening through hole extends along the extension direction of the fixation support 311, and the fastener passes through the aligned fastening connection hole and the fastening through hole, and the fastener can slide along the fastening through hole.

[0144] The adjusting support 312 is generally plate-shaped. The upper width of the adjusting support 312 is preferably greater than the lower width. The tibial fixation component 32 is installed on the upper end of the adjusting support 312. This allows for convenient installation of the femoral fixation component 22 while reducing the overall size and weight of the adjusting support 312. At the same time, this design can also reduce the width of the fixing support 311 while increasing the support area of ​​the tibial support 31 on the animal leg, improving support performance, and better conforming to the characteristic of the animal leg being smaller at the lower end and larger at the upper end.

[0145] The tibial fixation assembly 32 includes a tibial clamping seat 321 and a tibial clamping plate 322. Two tibial clamping plates 322 are arranged opposite each other and spaced apart along a second horizontal direction. The tibial clamping plates 322 are used to clamp the tibia of the animal's leg. The tibial clamping plates 322 are mounted on the tibial clamping seat 321, and the tibial clamping seat 321 is mounted on the adjusting support 312.

[0146] Preferably, the mounting position of the tibia clamp 321 on the adjusting support 312 is adjustable along the second horizontal direction, thereby changing the clamping position of the tibia and thus providing more reliable clamping for animal legs of different leg types. Specifically, the tibia clamp 321 has an upper through hole 3215 extending along the second horizontal direction, and the adjusting support 312 has a lower through hole 3123. At least one of the upper through hole 3215 and the lower through hole 3123 is an elongated hole extending along the second horizontal direction. The femoral clamp 221 and the adjusting support 312 are securely connected to the adjusting fastener 33 passing through the upper through hole 3215 and the lower through hole 3123, and the adjusting fastener 33 can slide along the elongated hole. The structure of the adjusting fastener 33 can refer to the structure of the seat locking unit 15, and will not be described again here.

[0147] The tibial clamp 321 has an inverted T-shaped structure, including a connecting horizontal portion 3211 and a connecting vertical portion 3212. The connecting horizontal portion 3211 extends along a second horizontal direction and has an upper through hole 3215. The connecting vertical portion 3212 is vertically connected to the upper side of the connecting horizontal portion 3211 and is connected to the tibial clamp plate 322. Preferably, one upper through hole 3215 is provided on each of the opposite sides of the connecting vertical portion 3212 to improve the installation stability and reliability of the tibial clamp 321 on the adjusting support 312.

[0148] like Figure 16 As shown, in this embodiment, to enable the animal leg fixation device to be applicable to the fixation of animal legs of different widths, the distance between the two tibial clamping plates 322 is adjustable. Specifically, in this embodiment, the two tibial clamping plates 322 are a fixed clamping plate 322a and a movable clamping plate 322b, respectively. The fixed clamping plate 322a is fixedly connected to the tibial clamping seat 321. The tibial fixation assembly 32 also includes a distance adjustment unit 323, which is installed on the tibial clamping seat 321 and connected to the movable clamping plate 322b. The distance adjustment unit 323 can drive the movable clamping plate 322b to move in a direction closer to or farther from the fixed clamping plate 322a, thereby changing the distance between the two tibial clamping plates 322.

[0149] To improve the ease of installation of the adjustment unit, the tibial clamp 321 includes an adjustment seat 3213 that is opposite to and spaced apart from the fixed clamping plate 322a. The spacing adjustment unit 323 is installed on the adjustment seat 3213, and the movable clamping plate 322b is located between the adjustment seat 3213 and the fixed clamping plate 322a.

[0150] The spacing adjustment unit 323 includes an adjusting bolt 3231, which is threaded onto the adjusting seat 3213, and the end of the bolt 3231 is rotatably connected to the movable clamping plate 322b. That is, by turning the adjusting bolt 3231, the depth to which the end of the adjusting bolt 3231 penetrates the adjusting seat 3213 can be changed, thereby moving the movable clamping plate 322b along the extension direction of the adjusting bolt 3231, thus adjusting the spacing between the movable clamping plate 322b and the fixed clamping plate 322a.

[0151] To improve the ease of connection between the adjusting bolt 3231 and the movable clamping plate 322b, the spacing adjustment unit 323 also includes a fastening screw 3232. The fastening screw 3232 passes through the movable clamping plate 322b and is connected to the end face of the adjusting bolt 3231. The movable clamping plate 322b can rotate relative to the fastening screw 3232. Thus, while ensuring the rotation of the adjusting bolt 3231, the movable clamping plate 322b can move with the adjusting bolt 3231 without rotating with the adjusting bolt 3231.

[0152] The movable clamping plate 322b has a stepped through hole along the second horizontal direction. The end face of the screw of the adjusting bolt 3231 has an internal thread hole. The fastening screw 3232 passes through the adjusting through hole 215 and is threadedly connected to the internal thread hole. The screw head of the fastening screw 3232 abuts against the stepped surface of the stepped through hole, thereby preventing the fastening screw 3232 from protruding from the clamping surface of the movable clamping plate 322b.

[0153] The spacing adjustment unit 323 also includes a spacer ring 3233, which is rotatably sleeved on the outside of the fastening screw 3232. The movable clamping plate 322b and the adjusting bolt 3231 are located on opposite sides of the spacer ring 3233. The spacer ring 3233 prevents the movable clamping plate 322b from being driven to rotate or experiencing excessive wear due to direct contact between the end face of the adjusting bolt 3231 and the movable clamping plate 322b.

[0154] The tibial clamping plate 322 is preferably an arc-shaped plate, with its opening facing the other femoral clamping plate 222. By designing the arc-shaped tibial clamping plate 322, its shape can better match the shape of the animal's leg, improving clamping stability and reliability. To further enhance the clamping stability of the animal's leg, clamping teeth 3221 are protruding from the clamping surface of the tibial clamping plate 322. These teeth are elongated and spaced apart, increasing the tightness of the clamping grip of the tibial clamping plate 322 on the animal's leg and improving the reliability of clamping.

[0155] like Figure 1 , Figure 14 and Figure 15As shown, to improve the fixation stability of the knee joint of the animal leg, the animal leg fixation device also includes a joint fixation component 4, which is used to fix the knee joint. In this embodiment, the joint fixation component 4 includes a bone pin seat 41 and a bone pin. The bone pin seat 41 is rotatably mounted on the tibial support 31 around a second horizontal direction; the bone pin is mounted on the bone pin seat 41 and extends along the second horizontal direction, and the distance between the bone pin and the rotation axis of the bone pin seat 41 can be adjusted. By setting the joint fixation component 4, the knee joint of the animal leg can be fixed relative to the animal leg fixation device on the basis of fixing the femur and tibia of the animal leg, thereby avoiding displacement or shaking of the knee joint during surgery and further ensuring the reliability of the knee joint surgery test; at the same time, the above setting can adjust the position of the bone pin relative to the tibial fixation assembly 3 by rotating the bone pin seat 41 relative to the tibial fixation assembly 3 and adjusting the distance between the bone pin and the rotation axis, so that the bone pin can be better adjusted to be directly opposite the knee joint of the animal leg, improving the fixation accuracy and reliability of the knee joint. In other embodiments, the joint fixation component 4 may also be mounted on the upper end of the femoral fixation assembly 2.

[0156] The bone pin seat 41 has an elongated structure with an adjustment elongated hole 411 along its extension direction. The joint fixation assembly 4 also includes a rotating shaft 43, which extends along a second horizontal direction and is installed at the upper end of the tibial fixation assembly 3. The end of the rotating shaft 43 passes through the adjustment elongated hole 411 and can slide along the adjustment elongated hole 411. A locking nut 152 is threaded to the end of the rotating shaft 43. The locking nut 152 is located on the side of the bone pin seat 41 away from the tibial fixation assembly 3, and the locking nut 152 can press the bone pin seat 41 onto the tibial fixation assembly 3 by screwing, thereby realizing the connection between the tibial fixation assembly 3 and the bone pin seat 41.

[0157] To improve the ease of bone pin installation, the joint fixation assembly 4 also includes a bone pin sleeve 42, which extends along a second horizontal direction and is connected to the bone pin seat 41. The bone pin passes through the bone pin sleeve 42. The bone pin sleeve 42 has a set screw hole in the radial direction, which communicates with the inner cavity of the bone pin sleeve 42. The bone pin and the bone pin seat 41 are fastened together by a set screw passing through the set screw hole.

[0158] Example 2

[0159] like Figure 17 and Figure 18 As shown, this embodiment provides an animal leg fixing device, and the structure of the animal leg fixing device provided in this embodiment is basically the same as that in Embodiment 1, except that the setting of the seat locking unit 15 is different. This embodiment will not repeat the same content as in Embodiment 1.

[0160] In this embodiment, the seat locking unit 15 adopts a locking wrench structure. Specifically, the seat locking unit 15 includes a locking rod 156 and a locking head 157 connected to the lower end of the locking rod 156; the locking rod 156 passes through the small hole of the mounting hole 114 and extends upward out of the mounting seat 14, and the locking head 157 is located in the large hole of the mounting hole 114 and abuts against the bottom of the large hole. The seat locking unit 15 also includes a pressing seat 154, a hinge shaft 155, and an adjusting wrench 153. The pressing seat 154 is slidably sleeved on the outside of the locking rod 156 and located at the upper end of the mounting seat 14. The hinge shaft 155 passes horizontally through the upper end of the locking rod 156 and is located on the upper side of the pressing seat 154. The adjusting wrench 153 is sleeved on the hinge shaft 155 so that the adjusting wrench 153 can rotate around the axis of the hinge shaft 155, so that the adjusting wrench 153 can selectively press or release the pressing seat 154.

[0161] In this embodiment, the adjusting wrench 153 has a locked state where it presses down on the pressing seat 154 and an unlocked state where it is separated from the pressing seat 154. When the adjusting wrench 153 is in the locked state, it presses down on the pressing seat 154, causing the pressing seat 154 to press down on the mounting seat 14 and the fixed base 11, so that the fixed base 11 and the mounting seat 14 are clamped between the locking head 157 and the pressing seat 154, thereby ensuring the relative fixation between the fixed base 11 and the mounting seat 14. When the adjusting wrench 153 is in the unlocked state, the pressure applied by the adjusting wrench 153 to the pressing seat 154 is removed, thereby reducing the pressure applied by the pressing seat 154 to the mounting seat 14. The contact pressure between the mounting seat 14 and the fixed base 11 is smaller, and the mounting seat 14 can slide relative to the fixed base 11.

[0162] The adjusting wrench 153 includes a handle portion 1531 and a rotating ear portion 1532 disposed at one end of the handle portion 1531. Two rotating ears portion 1532 are spaced apart along the axial direction of the hinge shaft 155. The two rotating ears portion 1532 are respectively sleeved on both ends of the hinge shaft 155 and located on opposite sides of the locking rod 156. The upper end of the locking rod 156 is preferably set as a plane on opposite sides along the second horizontal direction to increase the contact area between the locking rod 156 and the rotating ear portion 1532 and improve the rotational reliability of the adjusting wrench 153.

[0163] The rotating lug 1532 can selectively press against the pressing seat 154 during rotation around the axis of the hinge shaft 155, so that the adjusting wrench 153 is in a locked or unlocked state. Preferably, the rotating lug 1532 is crank-shaped, that is, the distance between its outer periphery and the axis of the hinge shaft 155 gradually increases along the set rotation direction, thereby ensuring that the rotating lug 1532 can contact or disengage from the pressing seat 154 as it rotates.

[0164] Furthermore, the pressing seat 154 has an arc-shaped pressing groove 1541 corresponding to the rotating ear 1532. The arc-shaped opening of the pressing groove 1541 faces upward, and the center of the pressing groove 1541 is located on the rotation axis 43 of the hinge shaft 155. The radius of the arc corresponding to the pressing groove 1541 is r. The minimum distance between the outer periphery of the rotating ear 1532 and the rotation axis 43 is less than r, and the maximum distance between the outer periphery of the rotating ear 1532 and the rotation axis is greater than r.

[0165] Preferably, when the adjusting wrench 153 is rotated to abut against the bottom of the pressing groove 1541, the adjusting wrench 153 is in a locked state, and the adjusting wrench 153 is set approximately horizontally, which can reduce the probability of the user accidentally touching the adjusting wrench 153 and causing it to rotate to the unlocked position. When the adjusting wrench 153 is pulled upward from the horizontal position, the adjusting wrench 153 rotates to the unlocked position, disengaging from the pressing seat 154.

[0166] In this embodiment, the locking rod 156 and the locking head 157 are threaded together to improve the ease of assembly and disassembly of the seat locking unit 15. In other embodiments, the locking rod 156 and the locking head 157 can also be welded or integrally formed. Preferably, the opposite sides of the locking head 157 along the second horizontal direction are set as planes, and the planes abut against the opposite side walls of the large hole to better restrict the rotation of the locking head 157, thereby restricting the rotation of the locking rod 156, and improving the smoothness and stability of the sliding of the locking head 157 in the large hole.

[0167] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An animal leg fixing device, characterized in that, The animal leg fixing device includes: The base assembly (1) includes a fixed base (11) and a tibia mounting seat (14b) and a femoral mounting seat (14a) spaced apart on the fixed base (11) along a first horizontal direction, wherein the tibia mounting seat (14b) and / or the femoral mounting seat (14a) are slidably mounted on the fixed base (11) along the first horizontal direction. Tibial fixation assembly (3) includes a tibial support (31) and a tibial fixation component (32). The lower end of the tibial support (31) is rotatably mounted on the tibial mount (14b) about a second horizontal direction, and the upper end extends upward at an angle toward the femoral mount (14a). The tibial fixation component (32) is mounted to the tibial support (31), and the distance between the component and the tibial mount (14b) is adjustable in the extending direction of the tibial support (31). The tibial fixation component (32) is used to fix the tibia of an animal leg. The second horizontal direction is perpendicular to the first horizontal direction. The femoral fixation assembly (2) includes a femoral support (21) and a femoral fixation component (22). The lower end of the femoral support (21) is rotatably mounted on the femoral mounting seat (14a) about the second horizontal direction, and the upper end extends obliquely upward in the direction toward the tibia mounting seat (14b). The femoral fixation component (22) is mounted on the femoral support (21), and the distance between the femoral support (21) and the femoral mounting seat (14a) is adjustable in the extending direction of the femoral support (21). The femoral fixation component (22) is used to fix the femur of the animal leg. The mounting position of the femoral fixation component (22) on the femoral support (21) can be adjusted in the extension direction of the femoral support (21); And / or, the mounting position of the femoral fixation component (22) on the femoral support (21) is adjusted along a third direction, which is perpendicular to the second horizontal direction and the extension of the femoral support (21).

2. The animal leg fixing device according to claim 1, characterized in that, The femoral support member (21) includes a first support rod (211), a second support rod (212), and a third support rod (213) connected sequentially from bottom to top. The first support rod (211) and the third support rod (213) both extend upward at an angle away from the femoral mounting base (14a), and the first support rod (211) and the third support rod (213) are offset in the second horizontal direction. The length of the third support rod (213) is greater than twice the length of the first support rod (211). The femoral fixation component (22) is mounted on the third support rod (213), and the femoral fixation component (22) has a femoral clamping unit. The femoral clamping unit, the tibia fixation component (32) and the first support rod (211) are arranged facing each other in the first horizontal direction.

3. The animal leg fixing device according to claim 1, characterized in that, The femoral fixation assembly (22) includes a femoral clamping seat (221) and two femoral clamping plates (222). The two femoral clamping plates (222) are spaced apart in the second horizontal direction and are used to clamp the femur. The femoral clamping seat (221) is connected to the femoral support (21). One femoral clamping plate (222) is connected to the femoral clamping seat (221), and the other femoral clamping plate (222) is movably disposed.

4. The animal leg fixing device according to claim 1, characterized in that, The length of the tibial support (31) is adjustable, or the mounting position of the tibial fixation assembly (32) on the tibial support (31) is adjustable in the extension direction of the tibial support (31).

5. The animal leg fixing device according to claim 4, characterized in that, The tibial support (31) includes a fixed support (311) and an adjustable support (312). The lower end of the fixed support (311) is rotatably connected to the tibial mounting base (14b). The adjustable support (312) is slidably connected to the fixed support (311) to adjust the length of the tibial support (31). The tibial fixation assembly (32) is mounted on the adjustable support (312).

6. The animal leg fixing device according to claim 5, characterized in that, The adjusting support (312) has a plate-like structure, and the upper width of the adjusting support (312) is greater than the lower width of the adjusting support (312). The tibial fixation component (32) is installed on the upper end of the adjusting support (312); and / or, the adjusting support (312) is provided with a plate weight reduction hole (3122).

7. The animal leg fixing device according to claim 1, characterized in that, The tibial fixation assembly (32) includes a tibial clamping seat (321) and two tibial clamping plates (322). The tibial clamping seat (321) is mounted on the tibial support (31). The two tibial clamping plates (322) are used to clamp the tibia. The distance between the two tibial clamping plates (322) is adjustable. And / or, the mounting position of the tibial fixation assembly (32) on the tibial support (31) is adjustable in the second horizontal direction.

8. The animal leg fixing device according to claim 7, characterized in that, The two tibial clamping plates (322) are a fixed clamping plate (322a) and a movable clamping plate (322b), respectively. The fixed clamping plate (322a) is installed on the tibial clamping seat (321), and the tibial clamping seat (321) has an adjustment seat (3213) that is opposite to and spaced apart from the fixed clamping plate (322a). The tibial fixation assembly (32) further includes an adjustment unit (323), which is installed on the adjustment seat (3213) and connected to the movable clamping plate (322b). The movable clamping plate (322b) is located between the fixed clamping plate (322a) and the adjustment seat (3213). The adjustment unit (323) can drive the movable clamping plate (322b) to move away from or closer to the fixed clamping plate (322a).

9. The animal leg fixing device according to claim 7, characterized in that, The tibial clamp plate (322) has an arc-shaped structure, and the opening of the arc-shaped structure faces the other tibial clamp plate (322). And / or, the clamping surface of the tibial clamping plate (322) is provided with a plurality of clamping teeth (3221).

10. The animal leg fixing device according to any one of claims 1-9, characterized in that, The animal leg fixation device further includes a joint fixation component (4), which includes: The bone pin seat (41) is rotatably mounted on the upper end of the tibial support (31) or the femoral support (21) about the second horizontal direction; The bone needle is mounted on the bone needle seat (41) and extends along the second horizontal direction. The distance between the bone needle and the rotation axis of the bone needle seat (41) can be adjusted.

11. The animal leg fixing device according to claim 10, characterized in that, The bone pin seat (41) is mounted on the tibial support (31) or the femoral support (21) via a rotating shaft (43) that extends along the second horizontal direction; The bone needle seat (41) is elongated and has an adjustment hole (411) along its extension direction. The rotating shaft (43) slides through the adjustment hole (411) and the bone needle is installed at the upper end of the bone needle seat (41).

12. The animal leg fixing device according to any one of claims 1-9, characterized in that, The tibial mount (14b) includes a slide (141) and an extension (142). The slide (141) is slidably mounted on the fixed base (11). One end of the extension (142) is connected to the slide (141), and the other end of the extension (142) extends obliquely upward in a direction away from the femoral mount (14a). The lower end of the tibial support (31) is rotatably connected to the upper end of the extension (142). And / or, the femoral mount (14a) includes a slide (141) and an extension (142), the slide (141) being slidably mounted on the fixed base (11), one end of the extension (142) being connected to the slide (141), the other end of the extension (142) extending obliquely upward in a direction away from the tibial mount (14b), and the lower end of the femoral support (21) being rotatably connected to the upper end of the extension (142).

13. The animal leg fixing device according to any one of claims 1-9, characterized in that, The base assembly (1) also includes: The adjusting rod (12) includes an adjusting crossbar portion (121) extending along the second horizontal direction and an adjusting longitudinal bar portion (122) extending along the vertical direction. The fixed base (11) is slidably mounted on the adjusting crossbar portion (121) along the second horizontal direction. The beam fixing assembly (13) is slidably installed on the adjusting longitudinal rod (122), and the beam fixing assembly (13) is used to connect with the side beam of the operating table.

14. The animal leg fixing device according to any one of claims 1-9, characterized in that, The rotatable connection ends of the tibial support (31) and the femoral support (21) are rotatably connected to the corresponding tibial mount (14b) or femoral mount (14a) through the rotation adjustment assembly (5). The rotation adjustment assembly (5) includes a rotating seat (54) and a rotating mounting shaft (51). The rotating seat (54) is mounted on the corresponding tibial mounting seat (14b) or femoral mounting seat (14a). The rotating connection end is mounted on the rotating seat (54) through the rotating mounting shaft (51). The rotating seat (54) is provided with n fixing holes (541) evenly spaced around the rotating mounting shaft (51). The rotating connection end is provided with N adjusting holes evenly spaced along the circumference of the rotating mounting shaft (51), where 2N=3n. The rotation adjustment assembly (5) further includes a pin (521) inserted into the aligned adjustment hole and the fixing hole (541).

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