Femoral extramedullary positioning device for knee joint replacement

Abstract

The invention discloses a femoral extramedullary positioning device for knee joint replacement, and relates to the technical field of orthopedic appliances. The femoral extramedullary positioning device for knee joint replacement comprises a base, the top of the base is fixedly connected with a correction adjusting mechanism, the correction adjusting mechanism comprises a knee fixing sleeve, the top of the knee fixing sleeve is slidably connected with a knee fixing sliding plate, a trapezoidal sliding groove of the base is slidably connected with a leg fixing sleeve, and the leg fixing sleeve is slidably connected with a leg fixing sliding plate. And the top of the leg fixing sleeve is slidably connected with a leg fixing sliding plate, the top of the knee fixing sliding plate is fixedly connected with a knee joint fixing mechanism, and the top of the knee joint fixing mechanism is fixedly connected with an electromagnetic clamping mechanism. According to the femoral extramedullary positioning device for knee joint replacement, by arranging the electric adjusting mechanism, the electromagnetic clamping mechanism and the correction adjusting mechanism, accurate adjustment of the fixing force of the device is achieved, the stability and clamping reliability of the device are improved, and then the correction effect of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of orthopedic appliances, in particular to a femoral extramedullary positioning device for knee replacement. Background Art

[0002] The knee joint is an important weight-bearing joint of the lower limbs. Its structure and function are the most complex among human joints. Degenerative knee osteoarthritis is a common disease among the elderly. Severe knee osteoarthritis requires artificial knee replacement. In knee replacement, operations on the femur (such as osteotomy, prosthesis installation, etc.) require precise positioning and correction to ensure the optimal function and stability of the knee after replacement. The patent application with the publication number CN214259600U discloses a femoral extramedullary positioning device for knee replacement, comprising a base, a calf clamp is fixedly inlaid and installed in the center of the base, a clamp is installed on the upper end of the calf clamp through a connecting shaft, a snap is welded and installed on one end of the clamp, a medical insulation blanket is fixedly installed inside the calf clamp, and protective sponges are installed on the inner side walls of the medical insulation blanket and the clamp, a slide rod is welded and installed on the upper ends of both sides of the base, a support mounting seat is slidably inlaid on the upper end of the slide rod, and a knee clamp is welded and installed on the inner side of the support mounting seat; The patent provides a femoral extramedullary positioning device for knee replacement. The threaded rod of the knee clamp is tightened manually, and the tightening force is uneven, which can easily cause the fixation to loosen and affect the surgical effect. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a femoral extramedullary positioning device for knee replacement to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a femoral extramedullary positioning device for knee replacement, comprising a base, a trapezoidal slide groove is provided on the top of the base, a correction adjustment mechanism is fixedly connected to the top of the base, the correction adjustment mechanism comprises a knee fixing sleeve, a knee fixing slide plate is slidably connected to the top of the knee fixing sleeve, a leg fixing sleeve is slidably connected to the trapezoidal slide groove of the base, a leg fixing slide plate is slidably connected to the top of the leg fixing sleeve, a knee fixing mechanism is fixedly connected to the top of the knee fixing slide plate, an electric adjustment mechanism is fixedly connected to the top of the knee joint fixing mechanism, an electromagnetic clamping mechanism is fixedly connected to the top of the knee joint fixing mechanism, the top of the leg fixing slide plate is rotatably connected to a calf fixing mechanism, and the top of the base is fixedly connected to a driver; The electric adjustment mechanism comprises: A rotating base plate, which is rotatably connected to the top of the knee joint fixing mechanism and serves as the installation base of the entire electric adjustment mechanism; A power assembly, which is fixedly connected to the top of the electric adjustment mechanism and is the power source of the electric adjustment mechanism; A pressure sensor, the pressure sensor is fixedly connected to the inner side of the outer wall of the knee joint fixing mechanism, and is used to cooperate with the driver to adjust the power component; The screw rod is fixedly connected to the right side of the power assembly and is slidably connected to the electromagnetic clamping mechanism to achieve the fixation of the knee by the knee joint fixing mechanism.

[0005] Preferably, a circular through hole is provided at the bottom of the trapezoidal slide groove of the base, the knee fixing slide plate is located on the front side of the knee fixing sleeve, the knee fixing sleeve and the knee fixing slide plate are fixedly connected with reinforcing ribs on both the left and right sides, the bottom of the leg fixing sleeve is fixedly connected with the circular through hole of the trapezoidal slide groove of the base through a cylindrical pin, the knee fixing sleeve and the leg fixing sleeve are both connected with circular through holes on the left and right sides, the leg fixing sleeve and the leg fixing slide plate are both connected with circular through holes on the left and right sides, the knee fixing sleeve is fixedly connected to the knee fixing slide plate through a cylindrical pin, and the leg fixing sleeve is fixedly connected to the leg fixing slide plate through a cylindrical pin.

[0006] Preferably, the left and right sides of the leg-fixing slide are fixedly connected to a rotating shaft seat, a circular blind hole is opened on the top of the leg-fixing slide, and the leg-fixing slide is slidably connected to an adaptive sliding rod through the circular blind hole. The adaptive sliding rod includes a top connecting rod, the top of the top connecting rod is rotatably connected to the calf fixing mechanism, the bottom of the top connecting rod is fixedly connected to a bottom sliding rod, and the bottom of the bottom sliding rod is slidably connected to the blind hole at the top of the leg-fixing slide.

[0007] Preferably, the knee joint fixing mechanism includes a bottom pad, the bottom of the bottom pad is fixedly connected to the top of the knee fixing slide plate, the top of the bottom pad is fixedly connected to a bottom flexible pad, the left and right sides of the bottom pad are rotatably connected to side splints for fixing the knee from both sides, the inner side of the outer wall of the side splint is fixedly connected to a side flexible pad, and the bottom flexible pad and the side flexible pad are both made of foam rubber.

[0008] Preferably, the front cross-section of the rotating base plate is an inverted L-shape, a circular through hole is opened on the right side of the rotating base plate, the bottom of the rotating base plate is rotatably connected to the top of the side splint on the left, both sides of the side splint are connected with rectangular through holes, the side splint is fixedly connected with a pressure sensor through the rectangular through holes, the pressure sensor is used to detect pressure data when the side splint fixes the knee, and the pressure sensor is electrically connected to the driver through a wire.

[0009] Preferably, the power assembly includes a servo motor, the bottom of the servo motor is fixedly connected to the top of the rotating base plate through a bracket, the servo motor is electrically connected to the driver through a wire, the right side of the servo motor is fixedly connected to a coupling through a motor shaft, the right side of the coupling is rotatably connected to the right side of the rotating base plate, and the right side of the coupling is fixedly connected to a screw rod.

[0010] Preferably, the electromagnetic clamping mechanism includes a nut seat base plate, the front cross-section of the nut seat base plate is L-shaped, the bottom of the nut seat base plate is rotatably connected to the top of the side clamping plate on the right side, a nut seat is fixedly connected to the left side of the nut seat base plate, the nut seat base plate is slidably connected to the screw rod through the nut seat, a trapezoidal groove is provided on the top of the nut seat base plate, a locking clamp is fixedly connected to the right side of the screw rod, and an annular protrusion is fixedly connected to the surface of the locking clamp.

[0011] Preferably, the nut seat bottom plate is slidably connected with a passive clamp and an active clamp through a trapezoidal groove, the passive clamp includes a passive sliding seat, a circular blind hole is opened on the back of the passive sliding seat, the bottom of the passive sliding seat is slidably connected with the trapezoidal groove of the nut seat bottom plate, the top of the passive sliding seat is fixedly connected with a passive tooth plate, a semicircular groove is opened on one side of the passive tooth plate, a semi-annular protrusion is fixedly connected inside the semicircular groove of the passive tooth plate, the top of the passive tooth plate is fixedly connected with a passive sleeve, and the passive clamp is located on the front of the locking clamp.

[0012] Preferably, the active clamping block is located on the back of the locking clamping block, and the active clamping block includes an active sliding seat, the bottom of the active sliding seat is slidably connected to the trapezoidal sliding groove of the bottom plate of the nut seat, the top of the active sliding seat is fixedly connected to an active toothed plate, one side of the active toothed plate is provided with a semicircular groove, the semicircular groove of the active toothed plate is fixedly connected to a semi-annular protrusion, the top of the active toothed plate is fixedly connected to an active sleeve, an electromagnetic coil is arranged inside the active sleeve, a metal connecting rod is slidably connected inside the active sleeve, and the back of the metal connecting rod is fixedly connected to the back of the active sleeve through a spring. The metal connecting rod is slidably connected to the passive sleeve, the front and back sides of the active sleeve are fixedly connected with baffles, the top of the active sleeve is fixedly connected with an electromagnetic valve assembly, the electromagnetic valve assembly is electrically connected to the electromagnetic coil of the active sleeve, the electromagnetic valve assembly is electrically connected to the driver through a wire, the front side of the active sliding seat is fixedly connected with a reset slide rod, the reset slide rod is slidably connected to the circular blind hole on the back side of the passive sliding seat, the front side of the active sliding seat is fixedly connected to the back side of the passive sliding seat through a spring, the spring is slidably connected to the reset slide rod, and the front side of the active sleeve is fixedly connected with an elastic thin gasket.

[0013] Preferably, the calf fixing mechanism includes an elastic C-shaped splint, the bottom of the elastic C-shaped splint is rotatably connected to the top of the top connecting rod, the bottom of the elastic C-shaped splint is rotatably connected to the inner side of the outer wall of the rotating shaft seat, the front cross-section of the elastic C-shaped splint is U-shaped, the material of the elastic C-shaped splint is elastic plastic, the inner side of the outer wall of the elastic C-shaped splint is fixedly connected with a flexible lining, the material of the flexible lining is foam rubber, a temperature sensor is buried in the elastic C-shaped splint, the temperature sensor is electrically connected to the driver through a wire, and insulation pipe modules are fixedly connected on both sides of the elastic C-shaped splint, the insulation pipe module includes an electric heating pipe, and the insulation pipe module is electrically connected to the driver through a wire.

[0014] The present invention provides a femoral extramedullary positioning device for knee replacement, which has the following beneficial effects: 1. This kind of knee replacement femoral extramedullary positioning device can achieve precise adjustment of the fixing size of the knee joint fixing mechanism by setting an electric adjustment mechanism. Through the cooperation of the adjustment mechanism and the pressure sensor, the fixing force of the knee joint fixing mechanism of the device can be accurately adjusted, thereby improving the fixing and correction effect of the device and at the same time improving the stability of the device.

[0015] 2. This kind of knee replacement femoral extramedullary positioning device, by setting up an electromagnetic clamping mechanism, uses an electromagnet-driven sliding clamp block in conjunction with an electric adjustment mechanism to achieve size fixation after the electric adjustment mechanism adjusts the knee joint fixing mechanism, thereby improving the stability of the device and the reliability of clamping, and further improving the correction effect of the device.

[0016] 3. This femoral extramedullary positioning device for knee replacement, by providing a slidable correction and adjustment mechanism, enables the device to adapt to different leg positions and height requirements during knee replacement, improves the correction flexibility and application scope of the device, and further improves the correction application scope of the device by cooperating with the adjustment mechanism and the calf fixing mechanism.

[0017] 4. This kind of femoral extramedullary positioning device for knee replacement, by providing a calf fixing mechanism, uses an elastic splint to achieve adaptive clamping of the patient's calf area, thereby improving the flexibility of the correction clamping. At the same time, by providing a heat preservation mechanism and a flexible lining, the comfort of the correction process of the device is improved, thereby assisting in improving the correction effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the positional relationship between the knee joint fixing mechanism and the correction and adjustment mechanism of the present invention; Figure 3 It is a schematic diagram of the positional relationship between the calf fixing mechanism and the correction and adjustment mechanism of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement at point A; Figure 5 It is an overall schematic diagram of the knee joint fixation mechanism of the present invention; Figure 6 A cross-sectional view showing the positional relationship between the power assembly and the screw rod of the present invention; Figure 7 It is a schematic diagram of the positional relationship between the electric adjustment mechanism and the electromagnetic clamping mechanism of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the position relationship at B in FIG. Fig. 9 This is a schematic diagram of the position relationship between the active clamping block and the passive clamping block of the present invention; Fig.10 It is a schematic diagram of the overall structure of the calf fixing mechanism of the present invention.

[0019] In the figure: 1, base; 2, correction adjustment mechanism; 21, knee fixing sleeve; 22, leg fixing sleeve; 23, knee fixing slide plate; 24, leg fixing slide plate; 25, rotating shaft seat; 26, adaptive slide bar; 261, top connecting rod; 262, bottom slide bar; 3, knee joint fixing mechanism; 31, bottom pad; 32, bottom flexible pad; 33, side splint; 34, side flexible pad; 4, electric adjustment mechanism; 41, rotating bottom plate; 42, power assembly; 421, servo motor; 422, coupling; 43, pressure sensor; 4 4. Screw rod; 5. Electromagnetic clamping mechanism; 51. Nut seat bottom plate; 52. Locking clamp; 53. Passive clamp; 531. Passive sliding seat; 532. Passive tooth plate; 533. Passive sleeve; 54. Active clamp; 541. Active sliding seat; 542. Active tooth plate; 543. Active sleeve; 544. Metal connecting rod; 545. Solenoid valve assembly; 546. Reset slide rod; 547. Elastic thin washer; 6. Calf fixing mechanism; 61. Elastic C-shaped splint; 62. Flexible lining; 63. Insulation pipe module; 7. Driver. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Embodiment 1:

[0022] See also Figure 1-4 The present invention provides a technical solution: a femoral extramedullary positioning device for knee replacement, comprising a base 1, a trapezoidal slide groove is provided on the top of the base 1, and a circular through hole is provided at the bottom of the trapezoidal slide groove of the base 1. The top of the base 1 is fixedly connected with a correction adjustment mechanism 2, which includes a knee-fixed sleeve 21, and the top of the knee-fixed sleeve 21 is slidably connected with a knee-fixed slide plate 23, and the knee-fixed slide plate 23 is located on the front of the knee-fixed sleeve 21. The left and right sides of the knee-fixed sleeve 21 and the knee-fixed slide plate 23 are fixedly connected with reinforcing ribs. The trapezoidal slide groove of the base 1 is slidably connected with a leg-fixed sleeve 22, and the bottom of the leg-fixed sleeve 22 is fixedly connected with the circular through hole of the trapezoidal slide groove of the base 1 through a cylindrical pin. The top of the leg-fixed sleeve 22 is slidably connected with a leg-fixed slide plate 24, and the left and right sides of the knee-fixed sleeve 21 and the leg-fixed sleeve 22 are connected with circular through holes. The leg-fixed sleeve 22 and the leg-fixed slide plate 24 are connected with circular through holes. The left and right sides are both connected with circular through holes, the knee-fixing sleeve 21 is fixedly connected to the knee-fixing slide plate 23 through a cylindrical pin, the leg-fixing sleeve 22 is fixedly connected to the leg-fixing slide plate 24 through a cylindrical pin, the left and right sides of the leg-fixing slide plate 24 are both fixedly connected with a rotating shaft seat 25, a circular blind hole is provided on the top of the leg-fixing slide plate 24, the leg-fixing slide plate 24 is slidably connected with an adaptive slide bar 26 through the circular blind hole, the adaptive slide bar 26 includes a top connecting rod 261, the top of the top connecting rod 261 is rotatably connected to the calf fixing mechanism 6, the bottom of the top connecting rod 261 is fixedly connected with a bottom slide bar 262, and the bottom of the bottom slide bar 262 is slidably connected to the blind hole at the top of the leg-fixing slide plate 24; The top of the knee fixing slide plate 23 is fixedly connected to a knee joint fixing mechanism 3, the top of the knee joint fixing mechanism 3 is fixedly connected to an electric adjustment mechanism 4, the top of the knee joint fixing mechanism 3 is fixedly connected to an electromagnetic clamping mechanism 5, the top of the leg fixing slide plate 24 is rotatably connected to a calf fixing mechanism 6, and the top of the base 1 is fixedly connected to a driver 7.

[0023] When in use, before fixing the patient's legs, remove the cylindrical pins connecting the knee fixing sleeve 21 and the knee fixing slide plate 23, the leg fixing sleeve 22 and the leg fixing slide plate 24, and the leg fixing sleeve 22 and the base 1 respectively, adjust the positions of the leg fixing sleeve 22, the knee fixing slide plate 23, and the leg fixing slide plate 24 according to the angle that the patient needs to maintain during the replacement surgery, reinsert the fixing pins after the adjustment is completed to complete the fixation, and after the fixation is completed, let the patient's legs enter the device from the back of the knee joint fixing mechanism 3 until the knee part reaches the inside of the knee joint fixing mechanism 3, and the calf part reaches the calf fixing mechanism 6 at the same time, after the knee joint fixing mechanism 3 and the calf fixing mechanism 6 complete the fixation of the knee joint and the calf respectively, start the electric adjustment mechanism 4 and the electromagnetic clamping mechanism 5 through the driver 7, and perform the operation, after the operation is completed, the correction process is completed by the electric adjustment mechanism 4 and the electromagnetic clamping mechanism 5, after the correction is completed, turn off the electric adjustment mechanism 4 and the electromagnetic clamping mechanism 5, and move the patient's legs out of the device; When the patient's calf is fixed inside the calf fixing mechanism 6, the calf fixing mechanism 6 and the calf squeeze the adaptive sliding bar 26, the bottom of the calf fixing mechanism 6 rotates along the rotating shaft seat 25, and the adaptive sliding bar 26 slides downward along the circular blind hole on the top of the leg fixing slide plate 24, squeezing the spring at the same time. After the calf leaves the calf fixing mechanism 6, the calf fixing mechanism 6 is reset under the action of the adaptive sliding bar 26 and the spring. Embodiment 2:

[0024] See also Figure 1-7 On the basis of the first embodiment, the present invention provides a technical solution: the knee joint fixing mechanism 3 includes a bottom pad 31, the bottom of the bottom pad 31 is fixedly connected to the top of the knee fixing plate 23, the top of the bottom pad 31 is fixedly connected to a bottom flexible pad 32, the left and right sides of the bottom pad 31 are rotatably connected to side splints 33 for fixing the knee from both sides, both sides of the side splints 33 are connected to rectangular through holes, the inner side of the outer wall of the side splints 33 is fixedly connected to a side flexible pad 34, and the bottom flexible pad 32 and the side flexible pad 34 are made of foam rubber; The electric adjustment mechanism 4 comprises: The rotating base plate 41 is rotatably connected to the top of the knee joint fixing mechanism 3 and is the installation base of the entire electric adjustment mechanism 4. The front cross-section of the rotating base plate 41 is an inverted L-shape. A circular through hole is opened on the right side of the rotating base plate 41. The bottom of the rotating base plate 41 is rotatably connected to the top of the side clamping plate 33 on the left side. The power assembly 42 is fixedly connected to the top of the electric adjustment mechanism 4 and is the power source of the electric adjustment mechanism 4. The power assembly 42 includes a servo motor 421. The bottom of the servo motor 421 is fixedly connected to the top of the rotating base plate 41 through a bracket. The servo motor 421 is electrically connected to the driver 7 through a wire. The right side of the servo motor 421 is fixedly connected to a coupling 422 through a motor shaft. The right side of the coupling 422 is rotatably connected to the right side of the rotating base plate 41. The right side of the coupling 422 is fixedly connected to a screw rod 44; The pressure sensor 43 is fixedly connected to the inner side of the outer wall of the knee joint fixing mechanism 3, and is used to cooperate with the driver 7 to adjust the power assembly 42. The side splint 33 is fixedly connected with the pressure sensor 43 through a rectangular through hole. The pressure sensor 43 is used to detect the pressure data when the side splint 33 fixes the knee. The pressure sensor 43 is electrically connected to the driver 7 through a wire; The screw rod 44 is fixedly connected to the right side of the power assembly 42, and the right side of the coupling 422 is fixedly connected with the screw rod 44. The screw rod 44 is slidably connected to the electromagnetic clamping mechanism 5, and is used to realize the fixation of the knee by the knee joint fixing mechanism 3; During use, when the knee reaches the inside of the knee joint fixing mechanism 3, the servo motor 421 is started, and the servo motor 421 drives the screw rod 44 to rotate through the coupling 422. The screw rod 44 converts the rotation into the sliding of the electromagnetic clamping mechanism 5 on the surface of the screw rod 44, and then the electromagnetic clamping mechanism 5 slides in the direction close to the electric adjustment mechanism 4, and the electromagnetic clamping mechanism 5 drives the side splint 33 and the side flexible pad 34 below it to rotate together. The side flexible pad 34 is tightly attached to the knee and undergoes elastic deformation, thereby increasing the contact area with the skin outside the knee, thereby improving the stability and comfort of the correction clamping. When the side flexible pad 34 contacts the knee, the electric adjustment mechanism 4 drives the side splint 33 and the side flexible pad 34 below it to rotate under the action of the reaction force, and finally achieves a stable clamping of the knee. During the clamping process, the pressure sensor 43 transmits the clamping pressure data back to the driver 7. The driver 7 adjusts the working state of the servo motor 421 and the electromagnetic clamping mechanism 5 according to the pressure data of the side flexible pad 34. When the correction is completed, the servo motor 421 is turned off by the driver 7, and the servo motor 421 is reset, thereby realizing the separation of the knee joint fixing mechanism 3 and the knee. Embodiment three:

[0025] See also Figure 1-10 On the basis of the first and second embodiments, the present invention provides a technical solution: the nut seat bottom plate 51 is slidably connected with a passive clamping block 53 and an active clamping block 54 through a trapezoidal slide groove, the passive clamping block 53 includes a passive sliding seat 531, a circular blind hole is provided on the back of the passive sliding seat 531, the bottom of the passive sliding seat 531 is slidably connected with the trapezoidal slide groove of the nut seat bottom plate 51, a passive tooth plate 532 is fixedly connected to the top of the passive sliding seat 531, a semicircular groove is provided on one side of the passive tooth plate 532, a semi-circular protrusion is fixedly connected inside the semicircular groove of the passive tooth plate 532, a passive sleeve 533 is fixedly connected to the top of the passive tooth plate 532, and the passive clamping block 53 is located on the front of the locking clamping block 52; The active clamping block 54 is located on the back of the locking clamping block 52. The active clamping block 54 includes an active sliding seat 541. The bottom of the active sliding seat 541 is slidably connected to the trapezoidal sliding groove of the nut seat bottom plate 51. The top of the active sliding seat 541 is fixedly connected with an active tooth plate 542. A semicircular groove is opened on one side of the active tooth plate 542. A semi-annular protrusion is fixedly connected inside the semicircular groove of the active tooth plate 542. An active sleeve 543 is fixedly connected to the top of the active tooth plate 542. An electromagnetic coil is arranged inside the active sleeve 543. A metal connecting rod 544 is slidably connected inside the active sleeve 543. The back of the metal connecting rod 544 is fixedly connected to the back of the active sleeve 543 through a spring. The metal connecting rod 544 and The passive sleeve 533 is slidably connected, the front and back of the active sleeve 543 are fixedly connected with baffles, the top of the active sleeve 543 is fixedly connected with an electromagnetic valve assembly 545, the electromagnetic valve assembly 545 is electrically connected to the electromagnetic coil of the active sleeve 543, the electromagnetic valve assembly 545 is electrically connected to the driver 7 through a wire, the front of the active sliding seat 541 is fixedly connected with a reset slide rod 546, the reset slide rod 546 is slidably connected to the circular blind hole on the back of the passive sliding seat 531, the front of the active sliding seat 541 is fixedly connected to the back of the passive sliding seat 531 through a spring, the spring is slidably connected to the reset slide rod 546, and the front of the active sleeve 543 is fixedly connected with an elastic thin washer 547; The calf fixing mechanism 6 includes an elastic C-shaped splint 61, the bottom of the elastic C-shaped splint 61 is rotatably connected to the top of the top connecting rod 261, the bottom of the elastic C-shaped splint 61 is rotatably connected to the inner side of the outer wall of the rotating shaft seat 25, the front cross-section of the elastic C-shaped splint 61 is U-shaped, the material of the elastic C-shaped splint 61 is elastic plastic, the inner side of the outer wall of the elastic C-shaped splint 61 is fixedly connected with a flexible lining 62, the material of the flexible lining 62 is foam rubber, a temperature sensor is buried in the elastic C-shaped splint 61, the temperature sensor is electrically connected to the driver 7 through a wire, and both sides of the elastic C-shaped splint 61 are fixedly connected with an insulation pipe module 63, the insulation pipe module 63 includes an electric heating pipe, and the insulation pipe module 63 is electrically connected to the driver 7 through a wire.

[0026] When in use, the screw rod 44 rotates and drives the locking clamp 52 to rotate together, and moves laterally at the same time. When the electric adjustment mechanism 4 completes the rotation process, the driver 7 controls the electromagnetic valve assembly 545 to start. After the electromagnetic valve assembly 545 is started, an electromagnetic field is generated. The metal connecting rod 544 slides under the action of the electromagnetic force. After the metal connecting rod 544 slides, the passive clamp 53 is driven by the limit plate to slide together and approaches the surface of the locking clamp 52. When the passive tooth plate 532 is engaged with the locking clamp 52, the active clamp 54 starts to slide under the action of the reaction force until the active tooth plate 542 is engaged with the locking clamp 52. At this point, the clamping and fixing of the device during the correction process is realized. When the correction is completed and it needs to be released, the electromagnetic valve assembly 545 is powered off, and the active clamp 54 and the passive clamp 53 are separated and reset under the action of the spring on the surface of the reset slide bar 546. Before the calf part enters the calf fixing mechanism 6, the staff slightly bends the elastic C-shaped splint 61, and the elastic C-shaped splint 61 undergoes elastic deformation and the top opening expands. At this time, the patient's calf is placed in the elastic C-shaped splint 61 until the elastic C-shaped splint 61 contacts the flexible lining 62, and the elastic C-shaped splint 61 is released. The elastic C-shaped splint 61 drives the flexible lining 62 to clamp the calf part, and the flexible lining 62 undergoes elastic deformation to increase the contact area with the calf. After the device is started, the driver 7 controls the insulation tube module 63 to start. After the insulation tube module 63 is started, it generates heat, and the heat is transferred to the leg through the elastic C-shaped splint 61 and the flexible lining 62 to keep the leg warm and heated. During this period, the temperature sensor inside the elastic C-shaped splint 61 sends back temperature data in real time so that the driver 7 can adjust the heating power of the insulation tube module 63.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A femoral extramedullary positioning device for knee replacement, comprising a base (1), characterized in that: The top of the base (1) is provided with a trapezoidal slideway, the top of the base (1) is fixedly connected to a correction adjustment mechanism (2), the correction adjustment mechanism (2) comprises a knee fixing sleeve (21), the top of the knee fixing sleeve (21) is slidably connected to a knee fixing slide plate (23), the trapezoidal slideway of the base (1) is slidably connected to a leg fixing sleeve (22), the top of the leg fixing sleeve (22) is slidably connected to a leg fixing slide plate (24), the top of the knee fixing slide plate (23) is fixedly connected to a knee joint fixing mechanism (3), the top of the knee joint fixing mechanism (3) is fixedly connected to an electric adjustment mechanism (4), the top of the knee joint fixing mechanism (3) is fixedly connected to an electromagnetic clamping mechanism (5), the top of the leg fixing slide plate (24) is rotatably connected to a calf fixing mechanism (6), and the top of the base (1) is fixedly connected to a driver (7); The electric adjustment mechanism (4) comprises: A rotating base plate (41), the rotating base plate (41) being rotatably connected to the top of the knee joint fixing mechanism (3) and serving as a mounting base for the entire electric adjustment mechanism (4); A power assembly (42), wherein the power assembly (42) is fixedly connected to the top of the electric adjustment mechanism (4) and is a power source for the electric adjustment mechanism (4); A pressure sensor (43), the pressure sensor (43) being fixedly connected to the inner side of the outer wall of the knee joint fixing mechanism (3) and being used to cooperate with the driver (7) to regulate the power assembly (42); A screw rod (44) is fixedly connected to the right side of the power assembly (42), and the screw rod (44) is slidably connected to the electromagnetic clamping mechanism (5) to achieve fixation of the knee by the knee joint fixation mechanism (3).

2. The femoral extramedullary positioning device for knee replacement according to claim 1, characterized in that: A circular through hole is provided at the bottom of the trapezoidal slide groove of the base (1); the knee-fixing slide plate (23) is located at the front of the knee-fixing sleeve (21); the left and right sides of the knee-fixing sleeve (21) and the knee-fixing slide plate (23) are fixedly connected with reinforcing ribs; the bottom of the leg-fixing sleeve (22) is fixedly connected to the circular through hole of the trapezoidal slide groove of the base (1) via a cylindrical pin; the left and right sides of the knee-fixing sleeve (21) and the leg-fixing sleeve (22) are connected with circular through holes; the left and right sides of the leg-fixing sleeve (22) and the leg-fixing slide plate (24) are connected with circular through holes; the knee-fixing sleeve (21) is fixedly connected to the knee-fixing slide plate (23) via a cylindrical pin; and the leg-fixing sleeve (22) is fixedly connected to the leg-fixing slide plate (24) via a cylindrical pin.

3. The femoral extramedullary positioning device for knee replacement according to claim 2, characterized in that: The left and right sides of the leg-fixing slide plate (24) are fixedly connected to a rotating shaft seat (25); a circular blind hole is formed at the top of the leg-fixing slide plate (24); the leg-fixing slide plate (24) is slidably connected to an adaptive slide bar (26) through the circular blind hole; the adaptive slide bar (26) comprises a top connecting rod (261); the top of the top connecting rod (261) is rotatably connected to the calf fixing mechanism (6); the bottom of the top connecting rod (261) is fixedly connected to a bottom slide bar (262); the bottom of the bottom slide bar (262) is slidably connected to the blind hole at the top of the leg-fixing slide plate (24).

4. The femoral extramedullary positioning device for knee replacement according to claim 2, characterized in that: The knee joint fixing mechanism (3) comprises a bottom pad (31), the bottom of the bottom pad (31) is fixedly connected to the top of the knee fixing slide plate (23), the top of the bottom pad (31) is fixedly connected to a bottom flexible pad (32), the left and right sides of the bottom pad (31) are rotatably connected to side splints (33) for fixing the knee from both sides, the inner side of the outer wall of the side splint (33) is fixedly connected to a side flexible pad (34), and the bottom flexible pad (32) and the side flexible pad (34) are both made of foam rubber.

5. The femoral extramedullary positioning device for knee replacement according to claim 4, characterized in that: The front cross-section of the rotating base plate (41) is an inverted L-shape. A circular through hole is provided on the right side of the rotating base plate (41). The bottom of the rotating base plate (41) is rotatably connected to the top of the side clamp plate (33) on the left side. Rectangular through holes are connected to both sides of the side clamp plate (33). The side clamp plate (33) is fixedly connected to a pressure sensor (43) via the rectangular through hole. The pressure sensor (43) is used to detect pressure data when the side clamp plate (33) fixes the knee. The pressure sensor (43) is electrically connected to the driver (7) via a wire.

6. The femoral extramedullary positioning device for knee replacement according to claim 5, characterized in that: The power assembly (42) comprises a servo motor (421), the bottom of the servo motor (421) is fixedly connected to the top of the rotating base plate (41) via a bracket, the servo motor (421) is electrically connected to the driver (7) via a wire, the right side of the servo motor (421) is fixedly connected to a coupling (422) via a motor shaft, the right side of the coupling (422) is rotatably connected to the right side of the rotating base plate (41), and the right side of the coupling (422) is fixedly connected to a lead screw (44).

7. The femoral extramedullary positioning device for knee replacement according to claim 6, characterized in that: The electromagnetic clamping mechanism (5) comprises a nut seat base plate (51), the front cross-section of the nut seat base plate (51) is L-shaped, the bottom of the nut seat base plate (51) is rotatably connected to the top of the side clamping plate (33) on the right side, the left side of the nut seat base plate (51) is fixedly connected to a nut seat, the nut seat base plate (51) is slidably connected to the screw rod (44) through the nut seat, the top of the nut seat base plate (51) is provided with a trapezoidal slide groove, the right side of the screw rod (44) is fixedly connected to a locking clamp block (52), and the surface of the locking clamp block (52) is fixedly connected to an annular protrusion.

8. The femoral extramedullary positioning device for knee replacement according to claim 7, characterized in that: The nut seat bottom plate (51) is slidably connected to a passive clamping block (53) and an active clamping block (54) via a trapezoidal sliding groove. The passive clamping block (53) comprises a passive sliding seat (531). A circular blind hole is provided on the back of the passive sliding seat (531). The bottom of the passive sliding seat (531) is slidably connected to the trapezoidal sliding groove of the nut seat bottom plate (51). A passive tooth plate (532) is fixedly connected to the top of the passive sliding seat (531). A semicircular groove is provided on one side of the passive tooth plate (532). A semi-annular protrusion is fixedly connected inside the semicircular groove of the passive tooth plate (532). A passive sleeve (533) is fixedly connected to the top of the passive tooth plate (532). The passive clamping block (533) is located on the front of the locking clamping block (52).

9. The femoral extramedullary positioning device for knee replacement according to claim 8, characterized in that: The active clamping block (54) is located on the back of the locking clamping block (52), and the active clamping block (54) includes an active sliding seat (541). The bottom of the active sliding seat (541) is slidably connected to the trapezoidal sliding groove of the nut seat bottom plate (51). The top of the active sliding seat (541) is fixedly connected to an active toothed plate (542). A semicircular groove is provided on one side of the active toothed plate (542). A semi-annular protrusion is fixedly connected inside the semicircular groove of the active toothed plate (542). The top of the active toothed plate (542) is fixedly connected to an active sleeve (543). An electromagnetic coil is provided inside the active sleeve (543). A metal connecting rod (544) is slidably connected inside the active sleeve (543). The back of the metal connecting rod (544) is fixedly connected to the back of the active sleeve (543) through a spring. The metal connecting rod (544) is fixedly connected to the back of the active sleeve (543) through a spring. 44) is slidably connected to the passive sleeve (533), the front and back sides of the active sleeve (543) are fixedly connected to baffles, the top of the active sleeve (543) is fixedly connected to an electromagnetic valve assembly (545), the electromagnetic valve assembly (545) is electrically connected to the electromagnetic coil of the active sleeve (543), the electromagnetic valve assembly (545) is electrically connected to the driver (7) through a wire, the front side of the active sliding seat (541) is fixedly connected to a reset slide rod (546), the reset slide rod (546) is slidably connected to a circular blind hole on the back side of the passive sliding seat (531), the front side of the active sliding seat (541) is fixedly connected to the back side of the passive sliding seat (531) through a spring, the spring is slidably connected to the reset slide rod (546), and the front side of the active sleeve (543) is fixedly connected to an elastic thin washer (547).

10. The femoral extramedullary positioning device for knee replacement according to claim 3, characterized in that: The calf fixing mechanism (6) comprises an elastic C-shaped splint (61), the bottom of the elastic C-shaped splint (61) is rotatably connected to the top of the top connecting rod (261), the bottom of the elastic C-shaped splint (61) is rotatably connected to the inner side of the outer wall of the rotating shaft seat (25), the front cross-section of the elastic C-shaped splint (61) is U-shaped, the material of the elastic C-shaped splint (61) is elastic plastic, the inner side of the outer wall of the elastic C-shaped splint (61) is fixedly connected to a flexible lining (62), the material of the flexible lining (62) is foam rubber, a temperature sensor is embedded in the elastic C-shaped splint (61), the temperature sensor is electrically connected to the driver (7) via a wire, and both sides of the elastic C-shaped splint (61) are fixedly connected to a heat preservation pipe module (63), the heat preservation pipe module (63) comprises an electric heating pipe, and the heat preservation pipe module (63) is electrically connected to the driver (7) via a wire.

Images