An orthopaedic joint surgery fixation device

Abstract

The application discloses a sports medical joint operation fixing device, which comprises a supporting platform and a supporting assembly. The supporting assembly comprises an adjusting mechanism, a supporting plate and a horizontal plate. The adjusting mechanism is arranged on the supporting platform along a first direction. The output end of the adjusting mechanism moves along the first direction. The control end of the supporting plate is connected with the adjusting mechanism, and the supporting plate is driven to rotate around the horizontal plate. When the output end of the adjusting mechanism moves along the first direction, the distance between the two supporting plates close to one end of the supporting platform changes, the supporting plate deflects, the supporting plate rotates around the horizontal plate, the included angle between the two supporting plates changes, the knee bending angle of a patient is continuously adjusted, the rotation angle of the supporting plate around the horizontal plate corresponds to the displacement amount of the output end of the adjusting mechanism, the displacement amount of the output end of the adjusting mechanism is controlled, the included angle between the two supporting plates is continuously and accurately adjusted, and the knee bending angle of the patient is continuously and steplessly adjusted.

Description

Technical Field

[0001] This invention relates to the field of surgical fixation technology, and more specifically to a joint fixation device for sports medicine surgery. Background Technology

[0002] In sports medicine joint surgeries, procedures such as knee arthroscopy and ligament reconstruction require frequent intraoperative adjustments to the patient's knee flexion angle to allow the surgeon to fully expose the joint space and perform precise manipulations. Currently, commonly used knee joint fixation devices in clinical practice typically include a thigh support and a calf support, with the knee flexion angle changed by manually adjusting the angle between the two supports. However, existing devices have certain shortcomings in the adjustment process.

[0003] Most existing devices use independent adjustment of the thigh support and calf support, which requires operation of two locking mechanisms. The adjustment steps are cumbersome and it is difficult to achieve synchronous and continuous adjustment of the angle of the two supports. During the adjustment process, there is no clear correspondence between the rotation angle of the support and the input of the operation. The surgeon cannot accurately control the knee flexion angle and often needs to make repeated adjustments, which affects the efficiency of the operation.

[0004] The clamping mechanism of existing devices usually uses a fixed-direction moving arc-shaped clamp. When clamping, it can only apply pressure to the side of the leg and cannot adapt to the differences in leg thickness among different patients. For patients with thinner legs, the leg is clamped from the side by a fixed-size arc-shaped clamp, and the vertical movement of the leg cannot be limited. The leg may slip during the operation, affecting the stability of the operation. The device lacks the adaptive adjustment capability to match the leg diameter and cannot achieve the convenient operation of clamping the leg as soon as it is released.

[0005] Moreover, changes in the knee flexion angle will cause changes in the contact position and force state of the leg relative to the support plate. However, the clamping force of the existing device remains basically unchanged throughout the knee flexion and cannot be automatically increased or decreased according to the knee flexion angle, resulting in a contradiction between insufficient clamping in the straight position and excessive compression in the flexed position. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a sports medicine joint surgery fixation device that facilitates adjustment of the knee flexion angle, allows for simultaneous and continuous adjustment of two support plates, and can adaptively clamp legs of different diameters. It applies force to legs of different diameters from both the side and vertical directions, enabling convenient operation of clamping the leg as soon as it is released.

[0007] A sports medicine joint surgery fixation device, comprising:

[0008] Support platform;

[0009] The support assembly includes an adjustment mechanism, a tray, and a cross plate. The adjustment mechanism is disposed on the support platform along a first direction, and the output end of the adjustment mechanism moves along the first direction. The control end of the tray is connected to the adjustment mechanism and is used to drive the tray to rotate around the cross plate. The end of the cross plate is hinged to the surface of the tray.

[0010] An adaptive clamping assembly is disposed on a tray, and the adaptive clamping assembly includes a support mechanism, a clamping mechanism, an adaptive mechanism, and a direction conversion mechanism;

[0011] The support mechanism is disposed on the pallet along a third direction, the telescopic end of the support mechanism extends and retracts along a third direction, the clamping mechanism is disposed on the telescopic end of the support mechanism along a third direction, the clamping mechanism has a rotatable clamping end for clamping the leg, and the adaptive mechanism is disposed on the support mechanism along a third direction for driving the clamping end of the clamping mechanism to rotate.

[0012] The fixed end of the direction conversion mechanism is set on the support platform, and the input end of the direction conversion mechanism is connected to the support mechanism. It is used to convert the second-direction displacement of the support mechanism caused by the change of the pallet angle into the movement of the support mechanism along the third direction.

[0013] Preferably, the support assembly further includes a guide seat, which is fixed to the surface of the cross plate along the second direction and is slidably connected within the support platform along the second direction.

[0014] Preferably, the adjustment mechanism includes a hinge seat, a sliding plate, a screw cylinder, a bidirectional screw, a limiting seat, and a limiting pin;

[0015] The hinge seat is slidably connected to the surface of the support platform along the second direction in the first direction. The hinge seat and the support plate are hinged at the ends near the support platform. The slide plate is fixedly connected to the surface of the hinge seat facing the support platform. The screw barrel passes through the surface of the slide plate along the second direction. The bidirectional screw and the screw barrel are threaded together. The limiting seat is fixedly connected to the surface of the support platform along the second direction. The bidirectional screw passes through the surface of the limiting seat along the first direction. The surface of the bidirectional screw has an annular groove along the circumference. The limiting pin passes through the surface of the limiting seat along the second direction and is threaded together with the limiting seat. The end of the limiting pin is located in the annular groove.

[0016] Preferably, the support mechanism includes a support plate, a guide plate, and a limiting plate. The support plate is slidably connected to the surface of the support plate away from the support platform along a third direction. The guide plate is fixedly connected to the surface of the support plate facing the support plate. A spring is fixedly connected to the surface of the support plate along a third direction.

[0017] Preferably, the limiting plate is fixedly connected to the surface of the guide plate opposite to the support plate, and the limiting plate is slidably connected to the surface of the support plate opposite to the support plate.

[0018] Preferably, the clamping mechanism includes a receiving plate and an arc-shaped clamping plate, wherein the surface of the receiving plate along a third direction is fixedly connected to a spring, and the straight section of the arc-shaped clamping plate is hinged to the surface of the receiving plate along a third direction.

[0019] Preferably, the adaptive mechanism includes a top plate, a top block, and a mounting plate. The mounting plate is fixedly connected to the surface of the top plate facing the arc-shaped clamping plate. A guide pin is fixedly connected to the surface of the mounting plate. The top plate is slidably connected to the surface of the guide pin in a radial direction. A guide groove is formed on the surface of the top plate facing the mounting plate. The guide pin is slidably connected along the extension direction of the guide groove. The top plate is slidably connected between the arc-shaped clamping plate and the receiving plate. The top block passes through the surface of the receiving plate in a third direction. The inclined surfaces of the top block and the top plate are in contact. A rotating plate is fixedly connected to the surface of the arc-shaped clamping plate facing the receiving plate. The rotating plate abuts against the top plate.

[0020] Preferably, the direction conversion mechanism includes a sliding pin, a guide cylinder, and a guide rod. The sliding pin is fixedly connected to the surface of the support plate along a third direction. The guide cylinder passes through the surface of the support platform along a second direction. The guide rod is slidably connected inside the guide cylinder along the second direction. A guide rail is hinged to the end of the guide rod away from the support platform. An inclined groove is formed on the surface of the guide rail along a third direction. The end of the sliding pin is slidably connected inside the inclined groove.

[0021] Preferably, it further includes a fixing component, which includes a support rod and a locking pin. The support rod is fixedly connected to the surface of the support platform along the second direction, and a mounting bracket is fixedly connected to the end of the support rod. The locking pin passes through the surface of the mounting bracket along the third direction and is threadedly engaged with the mounting bracket. The locking pin is mounted in a fixing plate by a bearing, and the fixing plate is slidably connected to the surface of the mounting bracket along the second direction.

[0022] The beneficial effects of this invention are reflected in:

[0023] 1. When the output end of the adjustment mechanism moves along the first direction, it drives the distance between the two trays near the support platform to change, thereby causing the trays to deflect and rotate around the horizontal plate, thus changing the included angle between the two trays and realizing continuous adjustment of the patient's knee flexion angle. The rotation angle of the trays around the horizontal plate corresponds to the displacement of the output end of the adjustment mechanism. By controlling the displacement of the output end of the adjustment mechanism, the included angle between the two trays can be continuously and accurately adjusted, thereby realizing stepless continuous adjustment of the patient's knee flexion angle.

[0024] 2. The clamping mechanism is elastically supported by the telescopic end of the support mechanism. Furthermore, the clamping end of the clamping mechanism can adapt to different leg diameters by acting on the support mechanism, thus achieving elastic adaptive clamping. The elastic support of the telescopic end of the support mechanism and the rotation of the clamping end of the clamping mechanism work together to enable the clamping mechanism to automatically adapt to the differences in leg thickness among different patients without relying on manual adjustment, achieving an elastic adaptive clamping effect where the leg is clamped as soon as it is released.

[0025] 3. By changing the angle of the pallet, the distance between the support mechanism and the support platform changes, causing the sliding pin fixed on the support plate to move synchronously in the second direction. Under the reaction force of the spring in the support mechanism, the sliding pin preferentially drives the guide rail to move, thereby causing the guide rod to slide in the guide cylinder in the second direction until the guide rod slides to the extension limit of the guide cylinder and is limited. During this process, the sliding pin only moves in the second direction and does not produce a third-direction displacement. The spring preload is small, the clamping force is small, and it is easy to put in or take out the leg. When the guide rod is limited, the sliding pin continues to move and slides in the inclined groove of the guide rail. Due to the restriction of the inclined surface of the inclined groove, the sliding pin is forced to produce a third-direction movement component. The larger the knee flexion angle, the greater the movement of the sliding pin in the third-direction, the spring preload gradually increases, and the clamping force continues to increase. The clamping force increases monotonically with the increase of the knee flexion angle, realizing automatic compensation between the clamping force and the leg displacement, ensuring that the leg is always stably attached to the surface of the pallet without relative slippage. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a bottom view of the support platform structure of the present invention;

[0029] Figure 3 This is a cross-sectional view of the limiting seat structure of the present invention;

[0030] Figure 4 This is a perspective view of the pallet structure of the present invention;

[0031] Figure 5 This is a perspective view of the guide tube structure of the present invention;

[0032] Figure 6 This is a perspective view of the guide rail structure of the present invention;

[0033] Figure 7This is a schematic diagram of the top block structure of the present invention;

[0034] Figure 8 This is a cross-sectional view of the guide rail of the present invention;

[0035] Figure 9 This is a perspective view of the receiving plate of the present invention.

[0036] In the attached diagram, 100 is the support platform; 200 is the fixing component; 210 is the support rod; 220 is the mounting bracket; 230 is the locking pin; 240 is the fixing plate; 300 is the support assembly; 310 is the adjusting mechanism; 311 is the hinge seat; 312 is the sliding plate; 313 is the screw barrel; 314 is the double-acting screw; 315 is the limit seat; 316 is the annular groove; 317 is the limit pin; 320 is the support plate; 330 is the horizontal plate; 340 is the guide seat; 400 is the self-adaptive clamping assembly; 41 is the support plate. 0. Support mechanism; 411. Support plate; 412. Guide plate; 413. Limiting plate; 414. Spring; 420. Clamping mechanism; 421. Receiving plate; 422. Arc-shaped clamping plate; 430. Adaptive mechanism; 431. Top plate; 432. Top block; 433. Mounting plate; 434. Guide pin; 435. Guide groove; 436. Turning plate; 440. Direction conversion mechanism; 441. Sliding pin; 442. Guide cylinder; 443. Guide rod; 444. Guide rail; 445. Inclined groove. Detailed Implementation

[0037] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0038] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0039] like Figures 1-9 As shown, a sports medicine joint surgery fixation device includes:

[0040] Support platform 100;

[0041] The support assembly 300 includes an adjustment mechanism 310, a support plate 320, and a cross plate 330. The adjustment mechanism 310 is disposed on the support platform 100 along a first direction. The output end of the adjustment mechanism 310 moves along the first direction. The control end of the support plate 320 is connected to the adjustment mechanism 310 and is used to drive the support plate 320 to rotate around the cross plate 330. The end of the cross plate 330 is hinged to the surface of the support plate 320.

[0042] An adaptive clamping assembly 400 is disposed on a tray 320. The adaptive clamping assembly 400 includes a support mechanism 410, a clamping mechanism 420, an adaptive mechanism 430, and a direction conversion mechanism 440.

[0043] The support mechanism 410 is disposed on the pallet 320 along the third direction. The telescopic end of the support mechanism 410 extends and retracts along the third direction. The clamping mechanism 420 is disposed on the telescopic end of the support mechanism 410 along the third direction. The clamping mechanism 420 has a rotatable clamping end for clamping the legs. The adaptive mechanism 430 is disposed on the support mechanism 410 along the third direction for driving the clamping end of the clamping mechanism 420 to rotate.

[0044] The fixed end of the direction conversion mechanism 440 is set on the support platform 100, and the input end of the direction conversion mechanism 440 is connected to the support mechanism 410. It is used to convert the second direction displacement of the support mechanism 410 caused by the change of the angle of the pallet 320 into the movement of the support mechanism 410 along the third direction.

[0045] By setting up a support platform 100 as the mounting base for the entire device, it is used to support and fix the other components and provide a fixed support point for the direction conversion mechanism 440. By setting up an adjustment mechanism 310, it is used to drive the end of the support plate 320 near the support platform 100 to move along a first direction, thereby changing the distance between the bottom ends of the two support plates 320, so that the support plate 320 can rotate around the horizontal plate 330, realizing continuous adjustment of the patient's knee flexion angle. By setting up the support plate 320 as the bearing surface for the patient's thigh and calf, it is used to pitch and rotate around the horizontal plate 330 under the drive of the adjustment mechanism 310, and during the rotation, it drives the support mechanism 410 set on it to generate a height change relative to the support platform 100 along a second direction. By setting up the horizontal plate 330 as the common hinge axis of the two support plates 320, it is used to provide a stable rotation center for the support plates 320, ensuring that the two support plates During the adjustment process, the rotation center of 320 is consistent. By setting a support mechanism 410, it is used to provide elastic support for the clamping mechanism 420 and transmit the third-direction movement output by the direction conversion mechanism 440 to the clamping mechanism 420. At the same time, the spring 414 inside provides elastic reaction force for the sliding pin 441, so that the sliding pin 441 drives the guide rail 444 to translate first when the guide rod 443 is not limited. By setting a clamping mechanism 420, it is used to directly contact and clamp the patient's leg. Under the drive of the adaptive mechanism 430, it automatically fits the legs of different diameters. By setting an adaptive mechanism 430, it is used to make the clamping end adaptively fit the legs of different diameters to achieve elastic adaptive clamping. By setting a direction conversion mechanism 440, it is used to convert the displacement of the support mechanism 410 along the second direction caused by the change of the angle of the support plate 320 into the movement of the support mechanism 410 along the third direction.

[0046] The first direction, the second direction, and the third direction all refer to bidirectional directions, and do not specifically refer to a particular end.

[0047] Furthermore, the support assembly 300 also includes a guide seat 340, which is fixed to the surface of the horizontal plate 330 along the second direction. The guide seat 340 is slidably connected within the support platform 100 along the second direction. By setting the guide seat 340, the horizontal plate 330 is slidably connected to the support platform 100, providing guidance and support for the horizontal plate 330 along the second direction. This allows the horizontal plate 330 to adaptively move slightly along the second direction when the pallet 320 rotates to compensate for changes in geometric position. At the same time, it restricts the rotation of the horizontal plate 330 around its own axis and the degrees of freedom in other directions, ensuring the stability of the rotation plane of the pallet 320.

[0048] Furthermore, the adjustment mechanism 310 includes a hinge seat 311, a sliding plate 312, a screw barrel 313, a double-acting screw 314, a limit seat 315, and a limit pin 317;

[0049] The hinge seat 311 is slidably connected to the surface of the support platform 100 along the second direction in the first direction. The hinge seat 311 and the support plate 320 are hinged to the end near the support platform 100. The slide plate 312 is fixedly connected to the surface of the hinge seat 311 facing the support platform 100. The screw barrel 313 passes through the surface of the slide plate 312 along the second direction. The bidirectional screw 314 and the screw barrel 313 are threaded together. The limiting seat 315 is fixedly connected to the surface of the support platform 100 along the second direction. The bidirectional screw 314 passes through the surface of the limiting seat 315 along the first direction. The surface of the bidirectional screw 314 is provided with an annular groove 316 along the circumferential direction. The limiting pin 317 passes through the surface of the limiting seat 315 along the second direction and is threaded together with the limiting seat 315. The end of the limiting pin 317 is located in the annular groove 316.

[0050] By setting a hinge seat 311, the end of the pallet 320 near the support platform 100 is slidably connected to the support platform 100, allowing the bottom of the pallet 320 to move along the first direction with the hinge seat 311, thereby realizing the pitch rotation of the pallet 320 around the horizontal plate 330. By setting a sliding plate 312, the screw barrel 313 is supported and the rotational motion of the bidirectional screw 314 is converted into the linear movement of the hinge seat 311. By setting the screw barrel 313, it serves as a threaded engagement part of the bidirectional screw 314, converting the rotational motion of the bidirectional screw 314 into the linear movement of the sliding plate 312 and the hinge seat 311 along the first direction. By setting the bidirectional screw 314 and the screw barrel 313 to be threadedly engaged, it serves as the power input part of the adjusting mechanism 310, driving the two screw barrels 313 and the sliding plate 312 fixed thereto to move in opposite directions along the first direction through its own forward and reverse rotation. The two hinge seats 311 can move in opposite directions, thereby changing the distance between them and driving the bottom ends of the two support plates 320 to move closer or further apart, thus adjusting the knee angle. A limit seat 315 is provided to provide axial support and limit the bidirectional screw 314, preventing axial movement of the bidirectional screw 314 during rotation. An annular groove 316 is provided on the surface of the bidirectional screw 314 along the circumferential direction to cooperate with the limit pin 317 and limit the axial displacement of the bidirectional screw 314. The limit pin 317 passes through the surface of the limit seat 315 along the second direction and is threadedly engaged with the limit seat 315, with its end located in the annular groove 316, to lock the bidirectional screw 314 in the axial direction, so that it can only rotate around its own axis and cannot move along the first direction, thereby ensuring that the rotational motion of the bidirectional screw 314 is stably transmitted to the screw barrel 313.

[0051] Furthermore, the support mechanism 410 includes a support plate 411, a guide plate 412 and a limiting plate 413. The support plate 411 is slidably connected to the surface of the support plate 320 away from the support platform 100 along a third direction. The guide plate 412 is fixedly connected to the surface of the support plate 411 facing the support plate 320. A spring 414 is fixedly connected to the surface of the support plate 411 along a third direction.

[0052] By setting a support plate 411, which serves as the main load-bearing component of the support mechanism 410, it can reciprocate along a third direction to drive the clamping mechanism 420 to move as a whole, and transmit the third-direction displacement output by the direction conversion mechanism 440 to the clamping mechanism 420. By setting a guide plate 412, a reliable mounting base is provided for the limiting plate 413, and a sliding guide engagement is formed with the support plate 320. By setting a spring 414, elastic support is provided for the clamping mechanism 420 along a third direction, so that the clamping mechanism 420 maintains a certain clamping preload in the initial state. At the same time, the preload of the spring 414 acts on the sliding pin 441, providing elastic reaction force to the sliding pin 441, so that the sliding pin 441 prioritizes driving the guide rail 444 to translate when the guide rod 443 is not limited, thereby realizing the automatic path selection function of the direction conversion mechanism 440.

[0053] Furthermore, the limiting plate 413 is fixedly connected to the surface of the guide plate 412 opposite to the support plate 411, and the limiting plate 413 is slidably connected to the surface of the support plate 320 opposite to the support plate 411. By setting the limiting plate 413, the travel range of the support plate 411 sliding in a third direction is limited, preventing the support plate 411 from detaching from the support plate 320 during the sliding process, and ensuring the stability and safety of the sliding movement.

[0054] Furthermore, the clamping mechanism 420 includes a receiving plate 421 and an arc-shaped clamping plate 422. The receiving plate 421 is fixedly connected to the spring 414 along the third direction. The straight section of the arc-shaped clamping plate 422 is hinged to the surface of the receiving plate 421 along the third direction. By setting the receiving plate 421, it serves as the base of the clamping mechanism 420, transmitting the elastic support force of the spring 414 to the entire clamping mechanism 420, so that the clamping mechanism 420 has an elastic preload in the initial state. By setting the straight section of the arc-shaped clamping plate 422 to be hinged to the surface of the receiving plate 421 along the third direction, it serves as an actuator that directly contacts and clamps the patient's leg. The arc-shaped clamping plate 422 rotates in the horizontal plane around the hinge point, so that the arc-shaped section of the arc-shaped clamping plate 422 automatically fits legs of different diameters under the drive of the adaptive mechanism 430.

[0055] Furthermore, the adaptive mechanism 430 includes a top plate 431, a top block 432, and a mounting plate 433. The mounting plate 433 is fixedly connected to the surface of the top plate 431 facing the arc-shaped clamping plate 422. A guide pin 434 is fixedly connected to the surface of the mounting plate 433. The top plate 431 is slidably connected to the surface of the guide pin 434 in the radial direction. A guide groove 435 is opened on the surface of the top plate 431 facing the mounting plate 433. The guide pin 434 is slidably connected along the extension direction of the guide groove 435. The top plate 431 is slidably connected between the arc-shaped clamping plate 422 and the receiving plate 421. The top block 432 passes through the surface of the receiving plate 421 in the third direction. The inclined surfaces of the top block 432 and the top plate 431 are in contact. A rotating plate 436 is fixedly connected to the surface of the arc-shaped clamping plate 422 facing the receiving plate 421. The rotating plate 436 abuts against the top plate 431.

[0056] The mounting plate 433 provides a stable mounting base for the guide pin 434 and constrains the sliding movement of the top plate 431 along a predetermined path. The guide pin 434 acts as a sliding guide for the top plate 431, cooperating with the guide groove 435 on the top plate 431 to guide the top plate 431 to slide along the extension direction of the guide groove 435. The top plate 431 converts linear sliding into the opening movement of the arc-shaped clamping plate 422. The cooperation between the inclined surface of the top plate 431 and the top block 432 converts the movement of the top block 432 in a third direction into linear sliding of the top plate 431. The top block 432 controls the linear sliding of the top plate 431, thereby pushing the clamping end of the arc-shaped clamping plate 422 to rotate. The rotating plate 436 converts the linear sliding of the top plate 431 into the opening movement of the arc-shaped clamping plate 422.

[0057] Furthermore, the direction conversion mechanism 440 includes a sliding pin 441, a guide cylinder 442, and a guide rod 443. The sliding pin 441 is fixedly connected to the surface of the support plate 411 along the third direction. The guide cylinder 442 passes through the surface of the support platform 100 along the second direction. The guide rod 443 is slidably connected in the guide cylinder 442 along the second direction. The end of the guide rod 443 away from the support platform 100 is hinged to a guide rail 444. The guide rail 444 has a groove 445 on its surface along the third direction. The end of the sliding pin 441 is slidably connected in the groove 445.

[0058] By setting a sliding pin 441, which serves as both the input and output of the direction conversion mechanism 440, it moves synchronously with the support plate 411 and transmits the second-direction displacement of the support plate 411 to the inclined groove 445 of the guide rail 444. Simultaneously, the constraint of the inclined groove 445 converts the second-direction movement of the sliding pin 441 into a third-direction movement, thereby driving the support plate 411 to move along the third-direction. By setting a guide cylinder 442, which serves as a sliding guide and limiting member for the guide rod 443, it provides a sliding track for the guide rod 443 along the second direction and limits the guide rod 443 when it slides to its extension limit. By setting a guide rod 443, which serves as a load-bearing member of the guide rail 444, it can slide freely along the second direction when not limited, and after being limited by the guide cylinder 442, it provides a fixed hinge fulcrum for the guide rail 444. By setting a guide rail 44... 4 and the inclined groove 445 are used to convert the second-direction movement of the sliding pin 441 into a third-direction movement. When the guide rod 443 is not limited, the sliding pin 441 moves along the second direction and pushes the guide rail 444 and the guide rod 443 to slide synchronously along the second direction. The sliding pin 441 only moves along the second direction in the inclined groove 445 without generating a third-direction component. When the guide rod 443 is limited by the guide cylinder 442, the hinge end of the guide rail 444 is fixed. When the sliding pin 441 continues to move along the second direction, it is forced to generate a third-direction movement component under the restriction of the inclined groove 445, thereby driving the sliding pin 441 and the support plate 411 fixed thereto to move along the third direction. By setting the inclined groove 445 on the surface of the guide rail 444 along the third direction, it is used as a constraint surface for direction conversion. Its inclination angle determines the conversion ratio between the second-direction displacement and the third-direction displacement.

[0059] Furthermore, it also includes a fixing component 200, which includes a support rod 210 and a locking pin 230. The support rod 210 is fixedly connected to the surface of the support platform 100 along the second direction. The end of the support rod 210 is fixedly connected to a mounting bracket 220. The locking pin 230 passes through the surface of the mounting bracket 220 along the third direction and is threadedly engaged with the mounting bracket 220. The locking pin 230 is mounted in a fixing plate 240 by a bearing. The fixing plate 240 is slidably connected to the surface of the mounting bracket 220 along the second direction.

[0060] By setting up a support rod 210, which serves as the main support of the fixing component 200, the entire device is firmly connected to the support platform 100 and the load of the device is transferred to the mounting frame 220. By setting up a mounting frame 220, it serves as the mounting base for the locking pin 230 and the fixing plate 240 and provides a sliding guide for the fixing plate 240. By setting up a locking pin 230, it is possible to rotate the locking pin 230 to move it in a third direction, thereby driving the fixing plate 240 to slide in a second direction, realizing the action of clamping or releasing the edge of the operating table. By setting up a fixing plate 240, it is possible to slide smoothly in the second direction when the locking pin 230 rotates.

[0061] Working principle: When adjusting the knee flexion angle, the bidirectional screw 314 is rotated. Under the axial constraint of the limiting seat 315 and the limiting pin 317, the bidirectional screw 314 rotates around its own axis. The forward and reverse rotation of the bidirectional screw 314 drives the two screw cylinders 313 to move in opposite or opposite directions along the first direction through the threaded engagement. The screw cylinders 313 drive the slide plate 312 and the hinge seat 311 fixed to them to move synchronously. The hinge seat 311 drives the end of the support plate 320 close to the support platform 100 to move. When the two hinge seats 311 approach each other, the distance between the bottom ends of the two support plates 320 decreases. When the support plate 320 deflects outward around the transverse plate 330, the angle between the two support plates 320 increases, and the patient's knee joint changes from an extended state to a flexed state. Conversely, when the two hinge seats 311 move away from each other, the support plate 320 deflects inward around the transverse plate 330, the angle decreases, and the patient's knee joint changes from a flexed state to an extended state. During this process, the transverse plate 330 slides synchronously in the second direction within the support platform 100 through the guide seat 340 to compensate for changes in geometric position and ensure that the rotation centers of the two support plates 320 always remain consistent, thereby achieving stepless continuous adjustment of the knee flexion angle.

[0062] When the patient's leg is placed between the arc-shaped splints 422, the lateral pressure of the leg causes the arc-shaped splints 422 to open outward. At this time, the spring 414 acts elastically on the support plate 421, which in turn causes the support plate 421 to move the arc-shaped splints 422, so that the vertical section of the arc-shaped splints 422 contacts the side of the leg and clamps the leg. At the same time, after the vertical section of the arc-shaped splints 422 contacts the leg, the spring 414 is compressed. At this time, the inclined surface of the top plate 431 fits against the top block 432, converting the movement of the top block 432 in the third direction into the linear sliding of the top plate 431. The top plate 431 presses the rotating plate 436, driving the clamping end of the arc-shaped splints 422 to rotate around the hinge point, so that the inner arc surface of the arc-shaped splints 422 always fits against the circumferential surface of the leg.

[0063] When the pallet 320 rotates around the horizontal plate 330, the support mechanism 410 set on the pallet 320 generates a height change relative to the support platform 100 in the second direction. The sliding pin 441 fixed on the support plate 411 moves synchronously with the support plate 411 in the second direction. The end of the sliding pin 441 is slidably connected in the inclined groove 445 of the guide rail 444. Under the elastic reaction force of the spring 414, the sliding pin 441 preferentially drives the guide rail 444 to move, thereby causing the guide rod 443 to slide in the guide cylinder 442 in the second direction. In this stage, the sliding pin 441 only moves in the second direction without generating a third-direction displacement. The preload of the spring 414 is small, the clamping force is small, and it is convenient for the legs to be put in or taken out.

[0064] When the guide rod 443 slides to the extension limit of the guide cylinder 442 and is limited, the hinge end of the guide rail 444 is fixed. At this time, the sliding pin 441 continues to move in the second direction. Under the restriction of the inclined surface of the inclined groove 445, it is forced to generate a movement component in the third direction. The larger the knee flexion angle, the larger the angle between the support plate 320 and the support platform 100, the greater the height change of the support mechanism 410 in the second direction, and the greater the movement of the sliding pin 441 in the third direction. The preload of the spring 414 gradually increases, and the clamping force continues to increase. Thus, the clamping force increases monotonically with the increase of the knee flexion angle. The clamping force is smaller in the straight position, which makes it easier to put the leg in or take it out. The clamping force is larger in the flexed position, which ensures that the leg can still be firmly clamped in the state of the popliteal soft tissue piled up and the contact area reduced, and avoids relative slippage.

[0065] The operator rotates the bidirectional screw 314, which drives the two support plates 320 to rotate around the horizontal plate 330 through the adjustment mechanism 310, thereby achieving stepless continuous adjustment of the knee flexion angle. After the patient's leg is placed in the arc-shaped splint 422, the adaptive mechanism 430 automatically drives the clamping end of the arc-shaped splint 422 to rotate, conforming to legs of different diameters and achieving elastic adaptive clamping. During the knee flexion angle adjustment process, the direction conversion mechanism 440 converts the second-direction displacement of the support mechanism 410 caused by the change of the angle of the support plate 320 into the movement of the support mechanism 410 along the third direction, thereby changing the preload and clamping force of the spring 414, so that the clamping force increases monotonically with the increase of the knee flexion angle, achieving automatic compensation between the clamping force and the leg displacement, ensuring that the leg is always stably attached to the surface of the support plate 320 without relative slippage within the full range of knee flexion.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A sports medicine joint surgery fixation device, characterized in that: include: Support platform (100); The support assembly (300) includes an adjustment mechanism (310), a tray (320), and a cross plate (330). The adjustment mechanism (310) is disposed on the support platform (100) along a first direction. The output end of the adjustment mechanism (310) moves along the first direction. The control end of the tray (320) is connected to the adjustment mechanism (310) and is used to drive the tray (320) to rotate around the cross plate (330). The end of the cross plate (330) is hinged to the surface of the tray (320). An adaptive clamping assembly (400) is disposed on a tray (320), the adaptive clamping assembly (400) including a support mechanism (410), a clamping mechanism (420), an adaptive mechanism (430) and a direction conversion mechanism (440). The support mechanism (410) is disposed on the tray (320) along a third direction. The telescopic end of the support mechanism (410) extends and retracts along a third direction. The clamping mechanism (420) is disposed on the telescopic end of the support mechanism (410) along a third direction. The clamping mechanism (420) has a rotatable clamping end for clamping the leg. The adaptive mechanism (430) is disposed on the support mechanism (410) along a third direction for driving the clamping end of the clamping mechanism (420) to rotate. The fixed end of the direction conversion mechanism (440) is set on the support platform (100), and the input end of the direction conversion mechanism (440) is connected to the support mechanism (410) to convert the second direction displacement of the support mechanism (410) caused by the change of the angle of the pallet (320) into the movement of the support mechanism (410) along the third direction.

2. The sports medicine joint surgery fixation device according to claim 1, characterized in that: The support assembly (300) further includes a guide seat (340), which is fixed to the surface of the cross plate (330) along the second direction and is slidably connected within the support platform (100) along the second direction.

3. The sports medicine joint surgery fixation device according to claim 1, characterized in that: The adjustment mechanism (310) includes a hinge seat (311), a sliding plate (312), a screw barrel (313), a double-acting screw (314), a limiting seat (315), and a limiting pin (317). The hinge seat (311) is slidably connected to the surface of the support platform (100) along the second direction in the first direction. The hinge seat (311) and the support plate (320) are hinged near the end of the support platform (100). The sliding plate (312) is fixedly connected to the surface of the hinge seat (311) facing the support platform (100). The screw barrel (313) passes through the surface of the sliding plate (312) along the second direction. The bidirectional screw (314) and the screw barrel (313) are threaded together. The limiting seat (315) is fixedly connected to the surface of the support platform (100) along the second direction. The bidirectional screw (314) passes through the surface of the limiting seat (315) along the first direction. The surface of the bidirectional screw (314) is provided with an annular groove (316) along the circumferential direction. The limiting pin (317) passes through the surface of the limiting seat (315) along the second direction and is threadedly engaged with the limiting seat (315). The end of the limiting pin (317) is located in the annular groove (316).

4. The sports medicine joint surgery fixation device according to claim 1, characterized in that: The support mechanism (410) includes a support plate (411), a guide plate (412), and a limiting plate (413). The support plate (411) is slidably connected to the surface of the pallet (320) away from the support platform (100) along a third direction. The guide plate (412) is fixedly connected to the surface of the support plate (411) facing the pallet (320). A spring (414) is fixedly connected to the surface of the support plate (411) along a third direction.

5. The sports medicine joint surgery fixation device according to claim 4, characterized in that: The limiting plate (413) is fixedly connected to the surface of the guide plate (412) away from the support plate (411), and the limiting plate (413) is slidably connected to the surface of the support plate (320) away from the support plate (411).

6. The sports medicine joint surgery fixation device according to claim 1, characterized in that: The clamping mechanism (420) includes a receiving plate (421) and an arc-shaped clamping plate (422). The receiving plate (421) is fixedly connected to a spring (414) along a third direction surface. The straight section of the arc-shaped clamping plate (422) is hinged to the receiving plate (421) along a third direction surface.

7. The sports medicine joint surgery fixation device according to claim 1, characterized in that: The adaptive mechanism (430) includes a top plate (431), a top block (432), and a mounting plate (433). The mounting plate (433) is fixedly connected to the surface of the top plate (431) facing the arc-shaped clamp (422). A guide pin (434) is fixedly connected to the surface of the mounting plate (433). The top plate (431) is slidably connected to the surface of the guide pin (434) radially. A guide groove (435) is formed on the surface of the top plate (431) facing the mounting plate (433). The pin (434) is slidably connected along the extension direction of the guide groove (435). The top plate (431) is slidably connected between the arc-shaped clamping plate (422) and the receiving plate (421). The top block (432) passes through the surface of the receiving plate (421) in a third direction. The inclined surfaces of the top block (432) and the top plate (431) are in contact. A rotating plate (436) is fixedly connected to the surface of the arc-shaped clamping plate (422) facing the receiving plate (421). The rotating plate (436) and the top plate (431) abut against each other.

8. The sports medicine joint surgery fixation device according to claim 1, characterized in that: The direction conversion mechanism (440) includes a sliding pin (441), a guide cylinder (442), and a guide rod (443). The sliding pin (441) is fixedly connected to the surface of the support plate (411) along a third direction. The guide cylinder (442) passes through the surface of the support platform (100) along a second direction. The guide rod (443) is slidably connected in the guide cylinder (442) along the second direction. The end of the guide rod (443) away from the support platform (100) is hinged to a guide rail (444). The guide rail (444) has a groove (445) on its surface along a third direction. The end of the sliding pin (441) is slidably connected in the groove (445).

9. The sports medicine joint surgery fixation device according to claim 1, characterized in that: It also includes a fixing component (200), which includes a support rod (210) and a locking pin (230). The support rod (210) is fixedly connected to the surface of the support platform (100) along the second direction. The end of the support rod (210) is fixedly connected to a mounting bracket (220). The locking pin (230) passes through the surface of the mounting bracket (220) along the third direction and is threadedly engaged with the mounting bracket (220). The locking pin (230) is mounted in a fixing plate (240) by a bearing. The fixing plate (240) is slidably connected to the surface of the mounting bracket (220) along the second direction.

Images